diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap_hwmod.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap_hwmod.c | 3265 |
1 files changed, 2716 insertions, 549 deletions
diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index 5a30658444d..6c074f37cdd 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1,7 +1,8 @@ /* * omap_hwmod implementation for OMAP2/3/4 * - * Copyright (C) 2009-2010 Nokia Corporation + * Copyright (C) 2009-2011 Nokia Corporation + * Copyright (C) 2011-2012 Texas Instruments, Inc. * * Paul Walmsley, Benoît Cousson, Kevin Hilman * @@ -71,7 +72,7 @@ * | (../mach-omap2/omap_hwmod*) | * +-------------------------------+ * | OMAP clock/PRCM/register fns | - * | (__raw_{read,write}l, clk*) | + * | ({read,write}l_relaxed, clk*) | * +-------------------------------+ * * Device drivers should not contain any OMAP-specific code or data in @@ -116,7 +117,6 @@ * - Open Core Protocol Specification 2.2 * * To do: - * - pin mux handling * - handle IO mapping * - bus throughput & module latency measurement code * @@ -130,44 +130,127 @@ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/io.h> -#include <linux/clk.h> +#include <linux/clk-provider.h> #include <linux/delay.h> #include <linux/err.h> #include <linux/list.h> #include <linux/mutex.h> - -#include <plat/common.h> -#include <plat/cpu.h> -#include <plat/clockdomain.h> -#include <plat/powerdomain.h> -#include <plat/clock.h> -#include <plat/omap_hwmod.h> -#include <plat/prcm.h> - -#include "cm.h" +#include <linux/spinlock.h> +#include <linux/slab.h> +#include <linux/bootmem.h> +#include <linux/cpu.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include <asm/system_misc.h> + +#include "clock.h" +#include "omap_hwmod.h" + +#include "soc.h" +#include "common.h" +#include "clockdomain.h" +#include "powerdomain.h" +#include "cm2xxx.h" +#include "cm3xxx.h" +#include "cminst44xx.h" +#include "cm33xx.h" #include "prm.h" - -/* Maximum microseconds to wait for OMAP module to softreset */ -#define MAX_MODULE_SOFTRESET_WAIT 10000 +#include "prm3xxx.h" +#include "prm44xx.h" +#include "prm33xx.h" +#include "prminst44xx.h" +#include "mux.h" +#include "pm.h" /* Name of the OMAP hwmod for the MPU */ #define MPU_INITIATOR_NAME "mpu" +/* + * Number of struct omap_hwmod_link records per struct + * omap_hwmod_ocp_if record (master->slave and slave->master) + */ +#define LINKS_PER_OCP_IF 2 + +/** + * struct omap_hwmod_soc_ops - fn ptrs for some SoC-specific operations + * @enable_module: function to enable a module (via MODULEMODE) + * @disable_module: function to disable a module (via MODULEMODE) + * + * XXX Eventually this functionality will be hidden inside the PRM/CM + * device drivers. Until then, this should avoid huge blocks of cpu_is_*() + * conditionals in this code. + */ +struct omap_hwmod_soc_ops { + void (*enable_module)(struct omap_hwmod *oh); + int (*disable_module)(struct omap_hwmod *oh); + int (*wait_target_ready)(struct omap_hwmod *oh); + int (*assert_hardreset)(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri); + int (*deassert_hardreset)(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri); + int (*is_hardreset_asserted)(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri); + int (*init_clkdm)(struct omap_hwmod *oh); + void (*update_context_lost)(struct omap_hwmod *oh); + int (*get_context_lost)(struct omap_hwmod *oh); +}; + +/* soc_ops: adapts the omap_hwmod code to the currently-booted SoC */ +static struct omap_hwmod_soc_ops soc_ops; + /* omap_hwmod_list contains all registered struct omap_hwmods */ static LIST_HEAD(omap_hwmod_list); -static DEFINE_MUTEX(omap_hwmod_mutex); - /* mpu_oh: used to add/remove MPU initiator from sleepdep list */ static struct omap_hwmod *mpu_oh; -/* inited: 0 if omap_hwmod_init() has not yet been called; 1 otherwise */ -static u8 inited; +/* io_chain_lock: used to serialize reconfigurations of the I/O chain */ +static DEFINE_SPINLOCK(io_chain_lock); +/* + * linkspace: ptr to a buffer that struct omap_hwmod_link records are + * allocated from - used to reduce the number of small memory + * allocations, which has a significant impact on performance + */ +static struct omap_hwmod_link *linkspace; + +/* + * free_ls, max_ls: array indexes into linkspace; representing the + * next free struct omap_hwmod_link index, and the maximum number of + * struct omap_hwmod_link records allocated (respectively) + */ +static unsigned short free_ls, max_ls, ls_supp; + +/* inited: set to true once the hwmod code is initialized */ +static bool inited; /* Private functions */ /** + * _fetch_next_ocp_if - return the next OCP interface in a list + * @p: ptr to a ptr to the list_head inside the ocp_if to return + * @i: pointer to the index of the element pointed to by @p in the list + * + * Return a pointer to the struct omap_hwmod_ocp_if record + * containing the struct list_head pointed to by @p, and increment + * @p such that a future call to this routine will return the next + * record. + */ +static struct omap_hwmod_ocp_if *_fetch_next_ocp_if(struct list_head **p, + int *i) +{ + struct omap_hwmod_ocp_if *oi; + + oi = list_entry(*p, struct omap_hwmod_link, node)->ocp_if; + *p = (*p)->next; + + *i = *i + 1; + + return oi; +} + +/** * _update_sysc_cache - return the module OCP_SYSCONFIG register, keep copy * @oh: struct omap_hwmod * * @@ -209,10 +292,9 @@ static void _write_sysconfig(u32 v, struct omap_hwmod *oh) /* XXX ensure module interface clock is up */ - if (oh->_sysc_cache != v) { - oh->_sysc_cache = v; - omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); - } + /* Module might have lost context, always update cache and register */ + oh->_sysc_cache = v; + omap_hwmod_write(v, oh, oh->class->sysc->sysc_offs); } /** @@ -317,7 +399,7 @@ static int _set_clockactivity(struct omap_hwmod *oh, u8 clockact, u32 *v) } /** - * _set_softreset: set OCP_SYSCONFIG.CLOCKACTIVITY bits in @v + * _set_softreset: set OCP_SYSCONFIG.SOFTRESET bit in @v * @oh: struct omap_hwmod * * @v: pointer to register contents to modify * @@ -345,6 +427,111 @@ static int _set_softreset(struct omap_hwmod *oh, u32 *v) } /** + * _clear_softreset: clear OCP_SYSCONFIG.SOFTRESET bit in @v + * @oh: struct omap_hwmod * + * @v: pointer to register contents to modify + * + * Clear the SOFTRESET bit in @v for hwmod @oh. Returns -EINVAL upon + * error or 0 upon success. + */ +static int _clear_softreset(struct omap_hwmod *oh, u32 *v) +{ + u32 softrst_mask; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, + "omap_hwmod: %s: sysc_fields absent for sysconfig class\n", + oh->name); + return -EINVAL; + } + + softrst_mask = (0x1 << oh->class->sysc->sysc_fields->srst_shift); + + *v &= ~softrst_mask; + + return 0; +} + +/** + * _wait_softreset_complete - wait for an OCP softreset to complete + * @oh: struct omap_hwmod * to wait on + * + * Wait until the IP block represented by @oh reports that its OCP + * softreset is complete. This can be triggered by software (see + * _ocp_softreset()) or by hardware upon returning from off-mode (one + * example is HSMMC). Waits for up to MAX_MODULE_SOFTRESET_WAIT + * microseconds. Returns the number of microseconds waited. + */ +static int _wait_softreset_complete(struct omap_hwmod *oh) +{ + struct omap_hwmod_class_sysconfig *sysc; + u32 softrst_mask; + int c = 0; + + sysc = oh->class->sysc; + + if (sysc->sysc_flags & SYSS_HAS_RESET_STATUS) + omap_test_timeout((omap_hwmod_read(oh, sysc->syss_offs) + & SYSS_RESETDONE_MASK), + MAX_MODULE_SOFTRESET_WAIT, c); + else if (sysc->sysc_flags & SYSC_HAS_RESET_STATUS) { + softrst_mask = (0x1 << sysc->sysc_fields->srst_shift); + omap_test_timeout(!(omap_hwmod_read(oh, sysc->sysc_offs) + & softrst_mask), + MAX_MODULE_SOFTRESET_WAIT, c); + } + + return c; +} + +/** + * _set_dmadisable: set OCP_SYSCONFIG.DMADISABLE bit in @v + * @oh: struct omap_hwmod * + * + * The DMADISABLE bit is a semi-automatic bit present in sysconfig register + * of some modules. When the DMA must perform read/write accesses, the + * DMADISABLE bit is cleared by the hardware. But when the DMA must stop + * for power management, software must set the DMADISABLE bit back to 1. + * + * Set the DMADISABLE bit in @v for hwmod @oh. Returns -EINVAL upon + * error or 0 upon success. + */ +static int _set_dmadisable(struct omap_hwmod *oh) +{ + u32 v; + u32 dmadisable_mask; + + if (!oh->class->sysc || + !(oh->class->sysc->sysc_flags & SYSC_HAS_DMADISABLE)) + return -EINVAL; + + if (!oh->class->sysc->sysc_fields) { + WARN(1, "omap_hwmod: %s: offset struct for sysconfig not provided in class\n", oh->name); + return -EINVAL; + } + + /* clocks must be on for this operation */ + if (oh->_state != _HWMOD_STATE_ENABLED) { + pr_warn("omap_hwmod: %s: dma can be disabled only from enabled state\n", oh->name); + return -EINVAL; + } + + pr_debug("omap_hwmod: %s: setting DMADISABLE\n", oh->name); + + v = oh->_sysc_cache; + dmadisable_mask = + (0x1 << oh->class->sysc->sysc_fields->dmadisable_shift); + v |= dmadisable_mask; + _write_sysconfig(v, oh); + + return 0; +} + +/** * _set_module_autoidle: set the OCP_SYSCONFIG AUTOIDLE field in @v * @oh: struct omap_hwmod * * @autoidle: desired AUTOIDLE bitfield value (0 or 1) @@ -373,7 +560,7 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, } autoidle_shift = oh->class->sysc->sysc_fields->autoidle_shift; - autoidle_mask = (0x3 << autoidle_shift); + autoidle_mask = (0x1 << autoidle_shift); *v &= ~autoidle_mask; *v |= autoidle << autoidle_shift; @@ -382,18 +569,63 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle, } /** + * _set_idle_ioring_wakeup - enable/disable IO pad wakeup on hwmod idle for mux + * @oh: struct omap_hwmod * + * @set_wake: bool value indicating to set (true) or clear (false) wakeup enable + * + * Set or clear the I/O pad wakeup flag in the mux entries for the + * hwmod @oh. This function changes the @oh->mux->pads_dynamic array + * in memory. If the hwmod is currently idled, and the new idle + * values don't match the previous ones, this function will also + * update the SCM PADCTRL registers. Otherwise, if the hwmod is not + * currently idled, this function won't touch the hardware: the new + * mux settings are written to the SCM PADCTRL registers when the + * hwmod is idled. No return value. + */ +static void _set_idle_ioring_wakeup(struct omap_hwmod *oh, bool set_wake) +{ + struct omap_device_pad *pad; + bool change = false; + u16 prev_idle; + int j; + + if (!oh->mux || !oh->mux->enabled) + return; + + for (j = 0; j < oh->mux->nr_pads_dynamic; j++) { + pad = oh->mux->pads_dynamic[j]; + + if (!(pad->flags & OMAP_DEVICE_PAD_WAKEUP)) + continue; + + prev_idle = pad->idle; + + if (set_wake) + pad->idle |= OMAP_WAKEUP_EN; + else + pad->idle &= ~OMAP_WAKEUP_EN; + + if (prev_idle != pad->idle) + change = true; + } + + if (change && oh->_state == _HWMOD_STATE_IDLE) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); +} + +/** * _enable_wakeup: set OCP_SYSCONFIG.ENAWAKEUP bit in the hardware * @oh: struct omap_hwmod * * * Allow the hardware module @oh to send wakeups. Returns -EINVAL * upon error or 0 upon success. */ -static int _enable_wakeup(struct omap_hwmod *oh) +static int _enable_wakeup(struct omap_hwmod *oh, u32 *v) { - u32 v, wakeup_mask; - if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) + !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || + (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) || + (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP))) return -EINVAL; if (!oh->class->sysc->sysc_fields) { @@ -401,16 +633,16 @@ static int _enable_wakeup(struct omap_hwmod *oh) return -EINVAL; } - wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); + if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) + *v |= 0x1 << oh->class->sysc->sysc_fields->enwkup_shift; - v = oh->_sysc_cache; - v |= wakeup_mask; - _write_sysconfig(v, oh); + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); + if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) + _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ - oh->_int_flags |= _HWMOD_WAKEUP_ENABLED; - return 0; } @@ -421,12 +653,12 @@ static int _enable_wakeup(struct omap_hwmod *oh) * Prevent the hardware module @oh to send wakeups. Returns -EINVAL * upon error or 0 upon success. */ -static int _disable_wakeup(struct omap_hwmod *oh) +static int _disable_wakeup(struct omap_hwmod *oh, u32 *v) { - u32 v, wakeup_mask; - if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) + !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) || + (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) || + (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP))) return -EINVAL; if (!oh->class->sysc->sysc_fields) { @@ -434,19 +666,34 @@ static int _disable_wakeup(struct omap_hwmod *oh) return -EINVAL; } - wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift); + if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) + *v &= ~(0x1 << oh->class->sysc->sysc_fields->enwkup_shift); - v = oh->_sysc_cache; - v &= ~wakeup_mask; - _write_sysconfig(v, oh); + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + _set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v); + if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) + _set_master_standbymode(oh, HWMOD_IDLEMODE_SMART, v); /* XXX test pwrdm_get_wken for this hwmod's subsystem */ - oh->_int_flags &= ~_HWMOD_WAKEUP_ENABLED; - return 0; } +static struct clockdomain *_get_clkdm(struct omap_hwmod *oh) +{ + struct clk_hw_omap *clk; + + if (oh->clkdm) { + return oh->clkdm; + } else if (oh->_clk) { + if (__clk_get_flags(oh->_clk) & CLK_IS_BASIC) + return NULL; + clk = to_clk_hw_omap(__clk_get_hw(oh->_clk)); + return clk->clkdm; + } + return NULL; +} + /** * _add_initiator_dep: prevent @oh from smart-idling while @init_oh is active * @oh: struct omap_hwmod * @@ -456,15 +703,24 @@ static int _disable_wakeup(struct omap_hwmod *oh) * will be accessed by a particular initiator (e.g., if a module will * be accessed by the IVA, there should be a sleepdep between the IVA * initiator and the module). Only applies to modules in smart-idle - * mode. Returns -EINVAL upon error or passes along - * clkdm_add_sleepdep() value upon success. + * mode. If the clockdomain is marked as not needing autodeps, return + * 0 without doing anything. Otherwise, returns -EINVAL upon error or + * passes along clkdm_add_sleepdep() value upon success. */ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { - if (!oh->_clk) + struct clockdomain *clkdm, *init_clkdm; + + clkdm = _get_clkdm(oh); + init_clkdm = _get_clkdm(init_oh); + + if (!clkdm || !init_clkdm) return -EINVAL; - return clkdm_add_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); + if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS) + return 0; + + return clkdm_add_sleepdep(clkdm, init_clkdm); } /** @@ -476,15 +732,24 @@ static int _add_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) * be accessed by a particular initiator (e.g., if a module will not * be accessed by the IVA, there should be no sleepdep between the IVA * initiator and the module). Only applies to modules in smart-idle - * mode. Returns -EINVAL upon error or passes along - * clkdm_del_sleepdep() value upon success. + * mode. If the clockdomain is marked as not needing autodeps, return + * 0 without doing anything. Returns -EINVAL upon error or passes + * along clkdm_del_sleepdep() value upon success. */ static int _del_initiator_dep(struct omap_hwmod *oh, struct omap_hwmod *init_oh) { - if (!oh->_clk) + struct clockdomain *clkdm, *init_clkdm; + + clkdm = _get_clkdm(oh); + init_clkdm = _get_clkdm(init_oh); + + if (!clkdm || !init_clkdm) return -EINVAL; - return clkdm_del_sleepdep(oh->_clk->clkdm, init_oh->_clk->clkdm); + if (clkdm && clkdm->flags & CLKDM_NO_AUTODEPS) + return 0; + + return clkdm_del_sleepdep(clkdm, init_clkdm); } /** @@ -502,16 +767,25 @@ static int _init_main_clk(struct omap_hwmod *oh) if (!oh->main_clk) return 0; - oh->_clk = omap_clk_get_by_name(oh->main_clk); - if (!oh->_clk) { + oh->_clk = clk_get(NULL, oh->main_clk); + if (IS_ERR(oh->_clk)) { pr_warning("omap_hwmod: %s: cannot clk_get main_clk %s\n", oh->name, oh->main_clk); return -EINVAL; } + /* + * HACK: This needs a re-visit once clk_prepare() is implemented + * to do something meaningful. Today its just a no-op. + * If clk_prepare() is used at some point to do things like + * voltage scaling etc, then this would have to be moved to + * some point where subsystems like i2c and pmic become + * available. + */ + clk_prepare(oh->_clk); - if (!oh->_clk->clkdm) - pr_warning("omap_hwmod: %s: missing clockdomain for %s.\n", - oh->main_clk, oh->_clk->name); + if (!_get_clkdm(oh)) + pr_debug("omap_hwmod: %s: missing clockdomain for %s.\n", + oh->name, oh->main_clk); return ret; } @@ -525,26 +799,36 @@ static int _init_main_clk(struct omap_hwmod *oh) */ static int _init_interface_clks(struct omap_hwmod *oh) { + struct omap_hwmod_ocp_if *os; + struct list_head *p; struct clk *c; - int i; + int i = 0; int ret = 0; - if (oh->slaves_cnt == 0) - return 0; - - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os = oh->slaves[i]; + p = oh->slave_ports.next; + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); if (!os->clk) continue; - c = omap_clk_get_by_name(os->clk); - if (!c) { + c = clk_get(NULL, os->clk); + if (IS_ERR(c)) { pr_warning("omap_hwmod: %s: cannot clk_get interface_clk %s\n", oh->name, os->clk); ret = -EINVAL; + continue; } os->_clk = c; + /* + * HACK: This needs a re-visit once clk_prepare() is implemented + * to do something meaningful. Today its just a no-op. + * If clk_prepare() is used at some point to do things like + * voltage scaling etc, then this would have to be moved to + * some point where subsystems like i2c and pmic become + * available. + */ + clk_prepare(os->_clk); } return ret; @@ -565,13 +849,23 @@ static int _init_opt_clks(struct omap_hwmod *oh) int ret = 0; for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) { - c = omap_clk_get_by_name(oc->clk); - if (!c) { + c = clk_get(NULL, oc->clk); + if (IS_ERR(c)) { pr_warning("omap_hwmod: %s: cannot clk_get opt_clk %s\n", oh->name, oc->clk); ret = -EINVAL; + continue; } oc->_clk = c; + /* + * HACK: This needs a re-visit once clk_prepare() is implemented + * to do something meaningful. Today its just a no-op. + * If clk_prepare() is used at some point to do things like + * voltage scaling etc, then this would have to be moved to + * some point where subsystems like i2c and pmic become + * available. + */ + clk_prepare(oc->_clk); } return ret; @@ -586,21 +880,22 @@ static int _init_opt_clks(struct omap_hwmod *oh) */ static int _enable_clocks(struct omap_hwmod *oh) { - int i; + struct omap_hwmod_ocp_if *os; + struct list_head *p; + int i = 0; pr_debug("omap_hwmod: %s: enabling clocks\n", oh->name); if (oh->_clk) clk_enable(oh->_clk); - if (oh->slaves_cnt > 0) { - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os = oh->slaves[i]; - struct clk *c = os->_clk; + p = oh->slave_ports.next; - if (c && (os->flags & OCPIF_SWSUP_IDLE)) - clk_enable(c); - } + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + + if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) + clk_enable(os->_clk); } /* The opt clocks are controlled by the device driver. */ @@ -616,21 +911,22 @@ static int _enable_clocks(struct omap_hwmod *oh) */ static int _disable_clocks(struct omap_hwmod *oh) { - int i; + struct omap_hwmod_ocp_if *os; + struct list_head *p; + int i = 0; pr_debug("omap_hwmod: %s: disabling clocks\n", oh->name); if (oh->_clk) clk_disable(oh->_clk); - if (oh->slaves_cnt > 0) { - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os = oh->slaves[i]; - struct clk *c = os->_clk; + p = oh->slave_ports.next; - if (c && (os->flags & OCPIF_SWSUP_IDLE)) - clk_disable(c); - } + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + + if (os->_clk && (os->flags & OCPIF_SWSUP_IDLE)) + clk_disable(os->_clk); } /* The opt clocks are controlled by the device driver. */ @@ -648,7 +944,7 @@ static void _enable_optional_clocks(struct omap_hwmod *oh) for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) if (oc->_clk) { pr_debug("omap_hwmod: enable %s:%s\n", oc->role, - oc->_clk->name); + __clk_get_name(oc->_clk)); clk_enable(oc->_clk); } } @@ -663,117 +959,474 @@ static void _disable_optional_clocks(struct omap_hwmod *oh) for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) if (oc->_clk) { pr_debug("omap_hwmod: disable %s:%s\n", oc->role, - oc->_clk->name); + __clk_get_name(oc->_clk)); clk_disable(oc->_clk); } } /** - * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use + * _omap4_enable_module - enable CLKCTRL modulemode on OMAP4 * @oh: struct omap_hwmod * * - * Returns the array index of the OCP slave port that the MPU - * addresses the device on, or -EINVAL upon error or not found. + * Enables the PRCM module mode related to the hwmod @oh. + * No return value. */ -static int _find_mpu_port_index(struct omap_hwmod *oh) +static void _omap4_enable_module(struct omap_hwmod *oh) { - int i; - int found = 0; + if (!oh->clkdm || !oh->prcm.omap4.modulemode) + return; + + pr_debug("omap_hwmod: %s: %s: %d\n", + oh->name, __func__, oh->prcm.omap4.modulemode); + + omap4_cminst_module_enable(oh->prcm.omap4.modulemode, + oh->clkdm->prcm_partition, + oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _am33xx_enable_module - enable CLKCTRL modulemode on AM33XX + * @oh: struct omap_hwmod * + * + * Enables the PRCM module mode related to the hwmod @oh. + * No return value. + */ +static void _am33xx_enable_module(struct omap_hwmod *oh) +{ + if (!oh->clkdm || !oh->prcm.omap4.modulemode) + return; - if (!oh || oh->slaves_cnt == 0) + pr_debug("omap_hwmod: %s: %s: %d\n", + oh->name, __func__, oh->prcm.omap4.modulemode); + + am33xx_cm_module_enable(oh->prcm.omap4.modulemode, oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _omap4_wait_target_disable - wait for a module to be disabled on OMAP4 + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to enter slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully enters + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_idle() function. + */ +static int _omap4_wait_target_disable(struct omap_hwmod *oh) +{ + if (!oh) return -EINVAL; - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os = oh->slaves[i]; + if (oh->_int_flags & _HWMOD_NO_MPU_PORT || !oh->clkdm) + return 0; - if (os->user & OCP_USER_MPU) { - found = 1; + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition, + oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _am33xx_wait_target_disable - wait for a module to be disabled on AM33XX + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to enter slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully enters + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_idle() function. + */ +static int _am33xx_wait_target_disable(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + return 0; + + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + return am33xx_cm_wait_module_idle(oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh + * @oh: struct omap_hwmod *oh + * + * Count and return the number of MPU IRQs associated with the hwmod + * @oh. Used to allocate struct resource data. Returns 0 if @oh is + * NULL. + */ +static int _count_mpu_irqs(struct omap_hwmod *oh) +{ + struct omap_hwmod_irq_info *ohii; + int i = 0; + + if (!oh || !oh->mpu_irqs) + return 0; + + do { + ohii = &oh->mpu_irqs[i++]; + } while (ohii->irq != -1); + + return i-1; +} + +/** + * _count_sdma_reqs - count the number of SDMA request lines associated with @oh + * @oh: struct omap_hwmod *oh + * + * Count and return the number of SDMA request lines associated with + * the hwmod @oh. Used to allocate struct resource data. Returns 0 + * if @oh is NULL. + */ +static int _count_sdma_reqs(struct omap_hwmod *oh) +{ + struct omap_hwmod_dma_info *ohdi; + int i = 0; + + if (!oh || !oh->sdma_reqs) + return 0; + + do { + ohdi = &oh->sdma_reqs[i++]; + } while (ohdi->dma_req != -1); + + return i-1; +} + +/** + * _count_ocp_if_addr_spaces - count the number of address space entries for @oh + * @oh: struct omap_hwmod *oh + * + * Count and return the number of address space ranges associated with + * the hwmod @oh. Used to allocate struct resource data. Returns 0 + * if @oh is NULL. + */ +static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os) +{ + struct omap_hwmod_addr_space *mem; + int i = 0; + + if (!os || !os->addr) + return 0; + + do { + mem = &os->addr[i++]; + } while (mem->pa_start != mem->pa_end); + + return i-1; +} + +/** + * _get_mpu_irq_by_name - fetch MPU interrupt line number by name + * @oh: struct omap_hwmod * to operate on + * @name: pointer to the name of the MPU interrupt number to fetch (optional) + * @irq: pointer to an unsigned int to store the MPU IRQ number to + * + * Retrieve a MPU hardware IRQ line number named by @name associated + * with the IP block pointed to by @oh. The IRQ number will be filled + * into the address pointed to by @dma. When @name is non-null, the + * IRQ line number associated with the named entry will be returned. + * If @name is null, the first matching entry will be returned. Data + * order is not meaningful in hwmod data, so callers are strongly + * encouraged to use a non-null @name whenever possible to avoid + * unpredictable effects if hwmod data is later added that causes data + * ordering to change. Returns 0 upon success or a negative error + * code upon error. + */ +static int _get_mpu_irq_by_name(struct omap_hwmod *oh, const char *name, + unsigned int *irq) +{ + int i; + bool found = false; + + if (!oh->mpu_irqs) + return -ENOENT; + + i = 0; + while (oh->mpu_irqs[i].irq != -1) { + if (name == oh->mpu_irqs[i].name || + !strcmp(name, oh->mpu_irqs[i].name)) { + found = true; break; } + i++; } - if (found) - pr_debug("omap_hwmod: %s: MPU OCP slave port ID %d\n", - oh->name, i); - else - pr_debug("omap_hwmod: %s: no MPU OCP slave port found\n", - oh->name); + if (!found) + return -ENOENT; + + *irq = oh->mpu_irqs[i].irq; - return (found) ? i : -EINVAL; + return 0; } /** - * _find_mpu_rt_base - find hwmod register target base addr accessible by MPU - * @oh: struct omap_hwmod * + * _get_sdma_req_by_name - fetch SDMA request line ID by name + * @oh: struct omap_hwmod * to operate on + * @name: pointer to the name of the SDMA request line to fetch (optional) + * @dma: pointer to an unsigned int to store the request line ID to * - * Return the virtual address of the base of the register target of - * device @oh, or NULL on error. + * Retrieve an SDMA request line ID named by @name on the IP block + * pointed to by @oh. The ID will be filled into the address pointed + * to by @dma. When @name is non-null, the request line ID associated + * with the named entry will be returned. If @name is null, the first + * matching entry will be returned. Data order is not meaningful in + * hwmod data, so callers are strongly encouraged to use a non-null + * @name whenever possible to avoid unpredictable effects if hwmod + * data is later added that causes data ordering to change. Returns 0 + * upon success or a negative error code upon error. */ -static void __iomem *_find_mpu_rt_base(struct omap_hwmod *oh, u8 index) +static int _get_sdma_req_by_name(struct omap_hwmod *oh, const char *name, + unsigned int *dma) { - struct omap_hwmod_ocp_if *os; - struct omap_hwmod_addr_space *mem; int i; - int found = 0; - void __iomem *va_start; - - if (!oh || oh->slaves_cnt == 0) - return NULL; + bool found = false; - os = oh->slaves[index]; + if (!oh->sdma_reqs) + return -ENOENT; - for (i = 0, mem = os->addr; i < os->addr_cnt; i++, mem++) { - if (mem->flags & ADDR_TYPE_RT) { - found = 1; + i = 0; + while (oh->sdma_reqs[i].dma_req != -1) { + if (name == oh->sdma_reqs[i].name || + !strcmp(name, oh->sdma_reqs[i].name)) { + found = true; break; } + i++; } - if (found) { - va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start); - if (!va_start) { - pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name); - return NULL; + if (!found) + return -ENOENT; + + *dma = oh->sdma_reqs[i].dma_req; + + return 0; +} + +/** + * _get_addr_space_by_name - fetch address space start & end by name + * @oh: struct omap_hwmod * to operate on + * @name: pointer to the name of the address space to fetch (optional) + * @pa_start: pointer to a u32 to store the starting address to + * @pa_end: pointer to a u32 to store the ending address to + * + * Retrieve address space start and end addresses for the IP block + * pointed to by @oh. The data will be filled into the addresses + * pointed to by @pa_start and @pa_end. When @name is non-null, the + * address space data associated with the named entry will be + * returned. If @name is null, the first matching entry will be + * returned. Data order is not meaningful in hwmod data, so callers + * are strongly encouraged to use a non-null @name whenever possible + * to avoid unpredictable effects if hwmod data is later added that + * causes data ordering to change. Returns 0 upon success or a + * negative error code upon error. + */ +static int _get_addr_space_by_name(struct omap_hwmod *oh, const char *name, + u32 *pa_start, u32 *pa_end) +{ + int i, j; + struct omap_hwmod_ocp_if *os; + struct list_head *p = NULL; + bool found = false; + + p = oh->slave_ports.next; + + i = 0; + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + + if (!os->addr) + return -ENOENT; + + j = 0; + while (os->addr[j].pa_start != os->addr[j].pa_end) { + if (name == os->addr[j].name || + !strcmp(name, os->addr[j].name)) { + found = true; + break; + } + j++; + } + + if (found) + break; + } + + if (!found) + return -ENOENT; + + *pa_start = os->addr[j].pa_start; + *pa_end = os->addr[j].pa_end; + + return 0; +} + +/** + * _save_mpu_port_index - find and save the index to @oh's MPU port + * @oh: struct omap_hwmod * + * + * Determines the array index of the OCP slave port that the MPU uses + * to address the device, and saves it into the struct omap_hwmod. + * Intended to be called during hwmod registration only. No return + * value. + */ +static void __init _save_mpu_port_index(struct omap_hwmod *oh) +{ + struct omap_hwmod_ocp_if *os = NULL; + struct list_head *p; + int i = 0; + + if (!oh) + return; + + oh->_int_flags |= _HWMOD_NO_MPU_PORT; + + p = oh->slave_ports.next; + + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + if (os->user & OCP_USER_MPU) { + oh->_mpu_port = os; + oh->_int_flags &= ~_HWMOD_NO_MPU_PORT; + break; } - pr_debug("omap_hwmod: %s: MPU register target at va %p\n", - oh->name, va_start); - } else { - pr_debug("omap_hwmod: %s: no MPU register target found\n", - oh->name); } - return (found) ? va_start : NULL; + return; +} + +/** + * _find_mpu_rt_port - return omap_hwmod_ocp_if accessible by the MPU + * @oh: struct omap_hwmod * + * + * Given a pointer to a struct omap_hwmod record @oh, return a pointer + * to the struct omap_hwmod_ocp_if record that is used by the MPU to + * communicate with the IP block. This interface need not be directly + * connected to the MPU (and almost certainly is not), but is directly + * connected to the IP block represented by @oh. Returns a pointer + * to the struct omap_hwmod_ocp_if * upon success, or returns NULL upon + * error or if there does not appear to be a path from the MPU to this + * IP block. + */ +static struct omap_hwmod_ocp_if *_find_mpu_rt_port(struct omap_hwmod *oh) +{ + if (!oh || oh->_int_flags & _HWMOD_NO_MPU_PORT || oh->slaves_cnt == 0) + return NULL; + + return oh->_mpu_port; +}; + +/** + * _find_mpu_rt_addr_space - return MPU register target address space for @oh + * @oh: struct omap_hwmod * + * + * Returns a pointer to the struct omap_hwmod_addr_space record representing + * the register target MPU address space; or returns NULL upon error. + */ +static struct omap_hwmod_addr_space * __init _find_mpu_rt_addr_space(struct omap_hwmod *oh) +{ + struct omap_hwmod_ocp_if *os; + struct omap_hwmod_addr_space *mem; + int found = 0, i = 0; + + os = _find_mpu_rt_port(oh); + if (!os || !os->addr) + return NULL; + + do { + mem = &os->addr[i++]; + if (mem->flags & ADDR_TYPE_RT) + found = 1; + } while (!found && mem->pa_start != mem->pa_end); + + return (found) ? mem : NULL; } /** * _enable_sysc - try to bring a module out of idle via OCP_SYSCONFIG * @oh: struct omap_hwmod * * - * If module is marked as SWSUP_SIDLE, force the module out of slave - * idle; otherwise, configure it for smart-idle. If module is marked - * as SWSUP_MSUSPEND, force the module out of master standby; - * otherwise, configure it for smart-standby. No return value. + * Ensure that the OCP_SYSCONFIG register for the IP block represented + * by @oh is set to indicate to the PRCM that the IP block is active. + * Usually this means placing the module into smart-idle mode and + * smart-standby, but if there is a bug in the automatic idle handling + * for the IP block, it may need to be placed into the force-idle or + * no-idle variants of these modes. No return value. */ static void _enable_sysc(struct omap_hwmod *oh) { u8 idlemode, sf; u32 v; + bool clkdm_act; + struct clockdomain *clkdm; if (!oh->class->sysc) return; + /* + * Wait until reset has completed, this is needed as the IP + * block is reset automatically by hardware in some cases + * (off-mode for example), and the drivers require the + * IP to be ready when they access it + */ + if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) + _enable_optional_clocks(oh); + _wait_softreset_complete(oh); + if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) + _disable_optional_clocks(oh); + v = oh->_sysc_cache; sf = oh->class->sysc->sysc_flags; + clkdm = _get_clkdm(oh); if (sf & SYSC_HAS_SIDLEMODE) { - idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? - HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART; + if (oh->flags & HWMOD_SWSUP_SIDLE || + oh->flags & HWMOD_SWSUP_SIDLE_ACT) { + idlemode = HWMOD_IDLEMODE_NO; + } else { + if (sf & SYSC_HAS_ENAWAKEUP) + _enable_wakeup(oh, &v); + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + idlemode = HWMOD_IDLEMODE_SMART_WKUP; + else + idlemode = HWMOD_IDLEMODE_SMART; + } + + /* + * This is special handling for some IPs like + * 32k sync timer. Force them to idle! + */ + clkdm_act = (clkdm && clkdm->flags & CLKDM_ACTIVE_WITH_MPU); + if (clkdm_act && !(oh->class->sysc->idlemodes & + (SIDLE_SMART | SIDLE_SMART_WKUP))) + idlemode = HWMOD_IDLEMODE_FORCE; + _set_slave_idlemode(oh, idlemode, &v); } if (sf & SYSC_HAS_MIDLEMODE) { - idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ? - HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART; + if (oh->flags & HWMOD_FORCE_MSTANDBY) { + idlemode = HWMOD_IDLEMODE_FORCE; + } else if (oh->flags & HWMOD_SWSUP_MSTANDBY) { + idlemode = HWMOD_IDLEMODE_NO; + } else { + if (sf & SYSC_HAS_ENAWAKEUP) + _enable_wakeup(oh, &v); + if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) + idlemode = HWMOD_IDLEMODE_SMART_WKUP; + else + idlemode = HWMOD_IDLEMODE_SMART; + } _set_master_standbymode(oh, idlemode, &v); } @@ -786,11 +1439,9 @@ static void _enable_sysc(struct omap_hwmod *oh) (sf & SYSC_HAS_CLOCKACTIVITY)) _set_clockactivity(oh, oh->class->sysc->clockact, &v); - _write_sysconfig(v, oh); - - /* If slave is in SMARTIDLE, also enable wakeup */ - if ((sf & SYSC_HAS_SIDLEMODE) && !(oh->flags & HWMOD_SWSUP_SIDLE)) - _enable_wakeup(oh); + /* If the cached value is the same as the new value, skip the write */ + if (oh->_sysc_cache != v) + _write_sysconfig(v, oh); /* * Set the autoidle bit only after setting the smartidle bit @@ -825,14 +1476,31 @@ static void _idle_sysc(struct omap_hwmod *oh) sf = oh->class->sysc->sysc_flags; if (sf & SYSC_HAS_SIDLEMODE) { - idlemode = (oh->flags & HWMOD_SWSUP_SIDLE) ? - HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART; + if (oh->flags & HWMOD_SWSUP_SIDLE) { + idlemode = HWMOD_IDLEMODE_FORCE; + } else { + if (sf & SYSC_HAS_ENAWAKEUP) + _enable_wakeup(oh, &v); + if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) + idlemode = HWMOD_IDLEMODE_SMART_WKUP; + else + idlemode = HWMOD_IDLEMODE_SMART; + } _set_slave_idlemode(oh, idlemode, &v); } if (sf & SYSC_HAS_MIDLEMODE) { - idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ? - HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART; + if ((oh->flags & HWMOD_SWSUP_MSTANDBY) || + (oh->flags & HWMOD_FORCE_MSTANDBY)) { + idlemode = HWMOD_IDLEMODE_FORCE; + } else { + if (sf & SYSC_HAS_ENAWAKEUP) + _enable_wakeup(oh, &v); + if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP) + idlemode = HWMOD_IDLEMODE_SMART_WKUP; + else + idlemode = HWMOD_IDLEMODE_SMART; + } _set_master_standbymode(oh, idlemode, &v); } @@ -874,7 +1542,6 @@ static void _shutdown_sysc(struct omap_hwmod *oh) * @name: find an omap_hwmod by name * * Return a pointer to an omap_hwmod by name, or NULL if not found. - * Caller must hold omap_hwmod_mutex. */ static struct omap_hwmod *_lookup(const char *name) { @@ -893,97 +1560,91 @@ static struct omap_hwmod *_lookup(const char *name) } /** - * _init_clocks - clk_get() all clocks associated with this hwmod + * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod * @oh: struct omap_hwmod * - * @data: not used; pass NULL * - * Called by omap_hwmod_late_init() (after omap2_clk_init()). - * Resolves all clock names embedded in the hwmod. Returns -EINVAL if - * the omap_hwmod has not yet been registered or if the clocks have - * already been initialized, 0 on success, or a non-zero error on - * failure. + * Convert a clockdomain name stored in a struct omap_hwmod into a + * clockdomain pointer, and save it into the struct omap_hwmod. + * Return -EINVAL if the clkdm_name lookup failed. */ -static int _init_clocks(struct omap_hwmod *oh, void *data) +static int _init_clkdm(struct omap_hwmod *oh) { - int ret = 0; - - if (!oh || (oh->_state != _HWMOD_STATE_REGISTERED)) - return -EINVAL; - - pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name); + if (!oh->clkdm_name) { + pr_debug("omap_hwmod: %s: missing clockdomain\n", oh->name); + return 0; + } - ret |= _init_main_clk(oh); - ret |= _init_interface_clks(oh); - ret |= _init_opt_clks(oh); + oh->clkdm = clkdm_lookup(oh->clkdm_name); + if (!oh->clkdm) { + pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n", + oh->name, oh->clkdm_name); + return 0; + } - if (!ret) - oh->_state = _HWMOD_STATE_CLKS_INITED; + pr_debug("omap_hwmod: %s: associated to clkdm %s\n", + oh->name, oh->clkdm_name); return 0; } /** - * _wait_target_ready - wait for a module to leave slave idle + * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as + * well the clockdomain. * @oh: struct omap_hwmod * + * @data: not used; pass NULL * - * Wait for a module @oh to leave slave idle. Returns 0 if the module - * does not have an IDLEST bit or if the module successfully leaves - * slave idle; otherwise, pass along the return value of the - * appropriate *_cm_wait_module_ready() function. + * Called by omap_hwmod_setup_*() (after omap2_clk_init()). + * Resolves all clock names embedded in the hwmod. Returns 0 on + * success, or a negative error code on failure. */ -static int _wait_target_ready(struct omap_hwmod *oh) +static int _init_clocks(struct omap_hwmod *oh, void *data) { - struct omap_hwmod_ocp_if *os; - int ret; - - if (!oh) - return -EINVAL; + int ret = 0; - if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + if (oh->_state != _HWMOD_STATE_REGISTERED) return 0; - os = oh->slaves[oh->_mpu_port_index]; - - if (oh->flags & HWMOD_NO_IDLEST) - return 0; + pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name); - /* XXX check module SIDLEMODE */ + if (soc_ops.init_clkdm) + ret |= soc_ops.init_clkdm(oh); - /* XXX check clock enable states */ + ret |= _init_main_clk(oh); + ret |= _init_interface_clks(oh); + ret |= _init_opt_clks(oh); - if (cpu_is_omap24xx() || cpu_is_omap34xx()) { - ret = omap2_cm_wait_module_ready(oh->prcm.omap2.module_offs, - oh->prcm.omap2.idlest_reg_id, - oh->prcm.omap2.idlest_idle_bit); - } else if (cpu_is_omap44xx()) { - ret = omap4_cm_wait_module_ready(oh->prcm.omap4.clkctrl_reg); - } else { - BUG(); - }; + if (!ret) + oh->_state = _HWMOD_STATE_CLKS_INITED; + else + pr_warning("omap_hwmod: %s: cannot _init_clocks\n", oh->name); return ret; } /** - * _lookup_hardreset - return the register bit shift for this hwmod/reset line + * _lookup_hardreset - fill register bit info for this hwmod/reset line * @oh: struct omap_hwmod * * @name: name of the reset line in the context of this hwmod + * @ohri: struct omap_hwmod_rst_info * that this function will fill in * * Return the bit position of the reset line that match the * input name. Return -ENOENT if not found. */ -static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name) +static int _lookup_hardreset(struct omap_hwmod *oh, const char *name, + struct omap_hwmod_rst_info *ohri) { int i; for (i = 0; i < oh->rst_lines_cnt; i++) { const char *rst_line = oh->rst_lines[i].name; if (!strcmp(rst_line, name)) { - u8 shift = oh->rst_lines[i].rst_shift; - pr_debug("omap_hwmod: %s: _lookup_hardreset: %s: %d\n", - oh->name, rst_line, shift); + ohri->rst_shift = oh->rst_lines[i].rst_shift; + ohri->st_shift = oh->rst_lines[i].st_shift; + pr_debug("omap_hwmod: %s: %s: %s: rst %d st %d\n", + oh->name, __func__, rst_line, ohri->rst_shift, + ohri->st_shift); - return shift; + return 0; } } @@ -996,29 +1657,31 @@ static u8 _lookup_hardreset(struct omap_hwmod *oh, const char *name) * @oh: struct omap_hwmod * * @name: name of the reset line to lookup and assert * - * Some IP like dsp, ipu or iva contain processor that require - * an HW reset line to be assert / deassert in order to enable fully - * the IP. + * Some IP like dsp, ipu or iva contain processor that require an HW + * reset line to be assert / deassert in order to enable fully the IP. + * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of + * asserting the hardreset line on the currently-booted SoC, or passes + * along the return value from _lookup_hardreset() or the SoC's + * assert_hardreset code. */ static int _assert_hardreset(struct omap_hwmod *oh, const char *name) { - u8 shift; + struct omap_hwmod_rst_info ohri; + int ret = -EINVAL; if (!oh) return -EINVAL; - shift = _lookup_hardreset(oh, name); - if (IS_ERR_VALUE(shift)) - return shift; + if (!soc_ops.assert_hardreset) + return -ENOSYS; - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs, - shift); - else if (cpu_is_omap44xx()) - return omap4_prm_assert_hardreset(oh->prcm.omap4.rstctrl_reg, - shift); - else - return -EINVAL; + ret = _lookup_hardreset(oh, name, &ohri); + if (ret < 0) + return ret; + + ret = soc_ops.assert_hardreset(oh, &ohri); + + return ret; } /** @@ -1027,35 +1690,70 @@ static int _assert_hardreset(struct omap_hwmod *oh, const char *name) * @oh: struct omap_hwmod * * @name: name of the reset line to look up and deassert * - * Some IP like dsp, ipu or iva contain processor that require - * an HW reset line to be assert / deassert in order to enable fully - * the IP. + * Some IP like dsp, ipu or iva contain processor that require an HW + * reset line to be assert / deassert in order to enable fully the IP. + * Returns -EINVAL if @oh is null, -ENOSYS if we have no way of + * deasserting the hardreset line on the currently-booted SoC, or passes + * along the return value from _lookup_hardreset() or the SoC's + * deassert_hardreset code. */ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) { - u8 shift; - int r; + struct omap_hwmod_rst_info ohri; + int ret = -EINVAL; + int hwsup = 0; if (!oh) return -EINVAL; - shift = _lookup_hardreset(oh, name); - if (IS_ERR_VALUE(shift)) - return shift; + if (!soc_ops.deassert_hardreset) + return -ENOSYS; - if (cpu_is_omap24xx() || cpu_is_omap34xx()) - r = omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs, - shift); - else if (cpu_is_omap44xx()) - r = omap4_prm_deassert_hardreset(oh->prcm.omap4.rstctrl_reg, - shift); - else - return -EINVAL; + ret = _lookup_hardreset(oh, name, &ohri); + if (ret < 0) + return ret; - if (r == -EBUSY) + if (oh->clkdm) { + /* + * A clockdomain must be in SW_SUP otherwise reset + * might not be completed. The clockdomain can be set + * in HW_AUTO only when the module become ready. + */ + hwsup = clkdm_in_hwsup(oh->clkdm); + ret = clkdm_hwmod_enable(oh->clkdm, oh); + if (ret) { + WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n", + oh->name, oh->clkdm->name, ret); + return ret; + } + } + + _enable_clocks(oh); + if (soc_ops.enable_module) + soc_ops.enable_module(oh); + + ret = soc_ops.deassert_hardreset(oh, &ohri); + + if (soc_ops.disable_module) + soc_ops.disable_module(oh); + _disable_clocks(oh); + + if (ret == -EBUSY) pr_warning("omap_hwmod: %s: failed to hardreset\n", oh->name); - return r; + if (!ret) { + /* + * Set the clockdomain to HW_AUTO, assuming that the + * previous state was HW_AUTO. + */ + if (oh->clkdm && hwsup) + clkdm_allow_idle(oh->clkdm); + } else { + if (oh->clkdm) + clkdm_hwmod_disable(oh->clkdm, oh); + } + + return ret; } /** @@ -1064,46 +1762,163 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name) * @oh: struct omap_hwmod * * @name: name of the reset line to look up and read * - * Return the state of the reset line. + * Return the state of the reset line. Returns -EINVAL if @oh is + * null, -ENOSYS if we have no way of reading the hardreset line + * status on the currently-booted SoC, or passes along the return + * value from _lookup_hardreset() or the SoC's is_hardreset_asserted + * code. */ static int _read_hardreset(struct omap_hwmod *oh, const char *name) { - u8 shift; + struct omap_hwmod_rst_info ohri; + int ret = -EINVAL; if (!oh) return -EINVAL; - shift = _lookup_hardreset(oh, name); - if (IS_ERR_VALUE(shift)) - return shift; + if (!soc_ops.is_hardreset_asserted) + return -ENOSYS; - if (cpu_is_omap24xx() || cpu_is_omap34xx()) { - return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs, - shift); - } else if (cpu_is_omap44xx()) { - return omap4_prm_is_hardreset_asserted(oh->prcm.omap4.rstctrl_reg, - shift); - } else { + ret = _lookup_hardreset(oh, name, &ohri); + if (ret < 0) + return ret; + + return soc_ops.is_hardreset_asserted(oh, &ohri); +} + +/** + * _are_all_hardreset_lines_asserted - return true if the @oh is hard-reset + * @oh: struct omap_hwmod * + * + * If all hardreset lines associated with @oh are asserted, then return true. + * Otherwise, if part of @oh is out hardreset or if no hardreset lines + * associated with @oh are asserted, then return false. + * This function is used to avoid executing some parts of the IP block + * enable/disable sequence if its hardreset line is set. + */ +static bool _are_all_hardreset_lines_asserted(struct omap_hwmod *oh) +{ + int i, rst_cnt = 0; + + if (oh->rst_lines_cnt == 0) + return false; + + for (i = 0; i < oh->rst_lines_cnt; i++) + if (_read_hardreset(oh, oh->rst_lines[i].name) > 0) + rst_cnt++; + + if (oh->rst_lines_cnt == rst_cnt) + return true; + + return false; +} + +/** + * _are_any_hardreset_lines_asserted - return true if any part of @oh is + * hard-reset + * @oh: struct omap_hwmod * + * + * If any hardreset lines associated with @oh are asserted, then + * return true. Otherwise, if no hardreset lines associated with @oh + * are asserted, or if @oh has no hardreset lines, then return false. + * This function is used to avoid executing some parts of the IP block + * enable/disable sequence if any hardreset line is set. + */ +static bool _are_any_hardreset_lines_asserted(struct omap_hwmod *oh) +{ + int rst_cnt = 0; + int i; + + for (i = 0; i < oh->rst_lines_cnt && rst_cnt == 0; i++) + if (_read_hardreset(oh, oh->rst_lines[i].name) > 0) + rst_cnt++; + + return (rst_cnt) ? true : false; +} + +/** + * _omap4_disable_module - enable CLKCTRL modulemode on OMAP4 + * @oh: struct omap_hwmod * + * + * Disable the PRCM module mode related to the hwmod @oh. + * Return EINVAL if the modulemode is not supported and 0 in case of success. + */ +static int _omap4_disable_module(struct omap_hwmod *oh) +{ + int v; + + if (!oh->clkdm || !oh->prcm.omap4.modulemode) return -EINVAL; - } + + /* + * Since integration code might still be doing something, only + * disable if all lines are under hardreset. + */ + if (_are_any_hardreset_lines_asserted(oh)) + return 0; + + pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__); + + omap4_cminst_module_disable(oh->clkdm->prcm_partition, + oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); + + v = _omap4_wait_target_disable(oh); + if (v) + pr_warn("omap_hwmod: %s: _wait_target_disable failed\n", + oh->name); + + return 0; } /** - * _reset - reset an omap_hwmod + * _am33xx_disable_module - enable CLKCTRL modulemode on AM33XX + * @oh: struct omap_hwmod * + * + * Disable the PRCM module mode related to the hwmod @oh. + * Return EINVAL if the modulemode is not supported and 0 in case of success. + */ +static int _am33xx_disable_module(struct omap_hwmod *oh) +{ + int v; + + if (!oh->clkdm || !oh->prcm.omap4.modulemode) + return -EINVAL; + + pr_debug("omap_hwmod: %s: %s\n", oh->name, __func__); + + if (_are_any_hardreset_lines_asserted(oh)) + return 0; + + am33xx_cm_module_disable(oh->clkdm->cm_inst, oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); + + v = _am33xx_wait_target_disable(oh); + if (v) + pr_warn("omap_hwmod: %s: _wait_target_disable failed\n", + oh->name); + + return 0; +} + +/** + * _ocp_softreset - reset an omap_hwmod via the OCP_SYSCONFIG bit * @oh: struct omap_hwmod * * * Resets an omap_hwmod @oh via the OCP_SYSCONFIG bit. hwmod must be - * enabled for this to work. Returns -EINVAL if the hwmod cannot be - * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if - * the module did not reset in time, or 0 upon success. + * enabled for this to work. Returns -ENOENT if the hwmod cannot be + * reset this way, -EINVAL if the hwmod is in the wrong state, + * -ETIMEDOUT if the module did not reset in time, or 0 upon success. * * In OMAP3 a specific SYSSTATUS register is used to get the reset status. - * Starting in OMAP4, some IPs does not have SYSSTATUS register and instead + * Starting in OMAP4, some IPs do not have SYSSTATUS registers and instead * use the SYSCONFIG softreset bit to provide the status. * - * Note that some IP like McBSP does have a reset control but no reset status. + * Note that some IP like McBSP do have reset control but don't have + * reset status. */ -static int _reset(struct omap_hwmod *oh) +static int _ocp_softreset(struct omap_hwmod *oh) { u32 v; int c = 0; @@ -1111,12 +1926,12 @@ static int _reset(struct omap_hwmod *oh) if (!oh->class->sysc || !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET)) - return -EINVAL; + return -ENOENT; /* clocks must be on for this operation */ if (oh->_state != _HWMOD_STATE_ENABLED) { - pr_warning("omap_hwmod: %s: reset can only be entered from " - "enabled state\n", oh->name); + pr_warn("omap_hwmod: %s: reset can only be entered from enabled state\n", + oh->name); return -EINVAL; } @@ -1124,38 +1939,39 @@ static int _reset(struct omap_hwmod *oh) if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) _enable_optional_clocks(oh); - pr_debug("omap_hwmod: %s: resetting\n", oh->name); + pr_debug("omap_hwmod: %s: resetting via OCP SOFTRESET\n", oh->name); v = oh->_sysc_cache; ret = _set_softreset(oh, &v); if (ret) goto dis_opt_clks; + _write_sysconfig(v, oh); - if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS) - omap_test_timeout((omap_hwmod_read(oh, - oh->class->sysc->syss_offs) - & SYSS_RESETDONE_MASK), - MAX_MODULE_SOFTRESET_WAIT, c); - else if (oh->class->sysc->sysc_flags & SYSC_HAS_RESET_STATUS) - omap_test_timeout(!(omap_hwmod_read(oh, - oh->class->sysc->sysc_offs) - & SYSC_TYPE2_SOFTRESET_MASK), - MAX_MODULE_SOFTRESET_WAIT, c); + if (oh->class->sysc->srst_udelay) + udelay(oh->class->sysc->srst_udelay); - if (c == MAX_MODULE_SOFTRESET_WAIT) + c = _wait_softreset_complete(oh); + if (c == MAX_MODULE_SOFTRESET_WAIT) { pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n", oh->name, MAX_MODULE_SOFTRESET_WAIT); - else + ret = -ETIMEDOUT; + goto dis_opt_clks; + } else { pr_debug("omap_hwmod: %s: softreset in %d usec\n", oh->name, c); + } + + ret = _clear_softreset(oh, &v); + if (ret) + goto dis_opt_clks; + + _write_sysconfig(v, oh); /* * XXX add _HWMOD_STATE_WEDGED for modules that don't come back from * _wait_target_ready() or _reset() */ - ret = (c == MAX_MODULE_SOFTRESET_WAIT) ? -ETIMEDOUT : 0; - dis_opt_clks: if (oh->flags & HWMOD_CONTROL_OPT_CLKS_IN_RESET) _disable_optional_clocks(oh); @@ -1164,46 +1980,250 @@ dis_opt_clks: } /** - * _omap_hwmod_enable - enable an omap_hwmod + * _reset - reset an omap_hwmod + * @oh: struct omap_hwmod * + * + * Resets an omap_hwmod @oh. If the module has a custom reset + * function pointer defined, then call it to reset the IP block, and + * pass along its return value to the caller. Otherwise, if the IP + * block has an OCP_SYSCONFIG register with a SOFTRESET bitfield + * associated with it, call a function to reset the IP block via that + * method, and pass along the return value to the caller. Finally, if + * the IP block has some hardreset lines associated with it, assert + * all of those, but do _not_ deassert them. (This is because driver + * authors have expressed an apparent requirement to control the + * deassertion of the hardreset lines themselves.) + * + * The default software reset mechanism for most OMAP IP blocks is + * triggered via the OCP_SYSCONFIG.SOFTRESET bit. However, some + * hwmods cannot be reset via this method. Some are not targets and + * therefore have no OCP header registers to access. Others (like the + * IVA) have idiosyncratic reset sequences. So for these relatively + * rare cases, custom reset code can be supplied in the struct + * omap_hwmod_class .reset function pointer. + * + * _set_dmadisable() is called to set the DMADISABLE bit so that it + * does not prevent idling of the system. This is necessary for cases + * where ROMCODE/BOOTLOADER uses dma and transfers control to the + * kernel without disabling dma. + * + * Passes along the return value from either _ocp_softreset() or the + * custom reset function - these must return -EINVAL if the hwmod + * cannot be reset this way or if the hwmod is in the wrong state, + * -ETIMEDOUT if the module did not reset in time, or 0 upon success. + */ +static int _reset(struct omap_hwmod *oh) +{ + int i, r; + + pr_debug("omap_hwmod: %s: resetting\n", oh->name); + + if (oh->class->reset) { + r = oh->class->reset(oh); + } else { + if (oh->rst_lines_cnt > 0) { + for (i = 0; i < oh->rst_lines_cnt; i++) + _assert_hardreset(oh, oh->rst_lines[i].name); + return 0; + } else { + r = _ocp_softreset(oh); + if (r == -ENOENT) + r = 0; + } + } + + _set_dmadisable(oh); + + /* + * OCP_SYSCONFIG bits need to be reprogrammed after a + * softreset. The _enable() function should be split to avoid + * the rewrite of the OCP_SYSCONFIG register. + */ + if (oh->class->sysc) { + _update_sysc_cache(oh); + _enable_sysc(oh); + } + + return r; +} + +/** + * _reconfigure_io_chain - clear any I/O chain wakeups and reconfigure chain + * + * Call the appropriate PRM function to clear any logged I/O chain + * wakeups and to reconfigure the chain. This apparently needs to be + * done upon every mux change. Since hwmods can be concurrently + * enabled and idled, hold a spinlock around the I/O chain + * reconfiguration sequence. No return value. + * + * XXX When the PRM code is moved to drivers, this function can be removed, + * as the PRM infrastructure should abstract this. + */ +static void _reconfigure_io_chain(void) +{ + unsigned long flags; + + spin_lock_irqsave(&io_chain_lock, flags); + + if (cpu_is_omap34xx() && omap3_has_io_chain_ctrl()) + omap3xxx_prm_reconfigure_io_chain(); + else if (cpu_is_omap44xx()) + omap44xx_prm_reconfigure_io_chain(); + + spin_unlock_irqrestore(&io_chain_lock, flags); +} + +/** + * _omap4_update_context_lost - increment hwmod context loss counter if + * hwmod context was lost, and clear hardware context loss reg + * @oh: hwmod to check for context loss + * + * If the PRCM indicates that the hwmod @oh lost context, increment + * our in-memory context loss counter, and clear the RM_*_CONTEXT + * bits. No return value. + */ +static void _omap4_update_context_lost(struct omap_hwmod *oh) +{ + if (oh->prcm.omap4.flags & HWMOD_OMAP4_NO_CONTEXT_LOSS_BIT) + return; + + if (!prm_was_any_context_lost_old(oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.context_offs)) + return; + + oh->prcm.omap4.context_lost_counter++; + prm_clear_context_loss_flags_old(oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.context_offs); +} + +/** + * _omap4_get_context_lost - get context loss counter for a hwmod + * @oh: hwmod to get context loss counter for + * + * Returns the in-memory context loss counter for a hwmod. + */ +static int _omap4_get_context_lost(struct omap_hwmod *oh) +{ + return oh->prcm.omap4.context_lost_counter; +} + +/** + * _enable_preprogram - Pre-program an IP block during the _enable() process + * @oh: struct omap_hwmod * + * + * Some IP blocks (such as AESS) require some additional programming + * after enable before they can enter idle. If a function pointer to + * do so is present in the hwmod data, then call it and pass along the + * return value; otherwise, return 0. + */ +static int _enable_preprogram(struct omap_hwmod *oh) +{ + if (!oh->class->enable_preprogram) + return 0; + + return oh->class->enable_preprogram(oh); +} + +/** + * _enable - enable an omap_hwmod * @oh: struct omap_hwmod * * * Enables an omap_hwmod @oh such that the MPU can access the hwmod's - * register target. (This function has a full name -- - * _omap_hwmod_enable() rather than simply _enable() -- because it is - * currently required by the pm34xx.c idle loop.) Returns -EINVAL if - * the hwmod is in the wrong state or passes along the return value of - * _wait_target_ready(). + * register target. Returns -EINVAL if the hwmod is in the wrong + * state or passes along the return value of _wait_target_ready(). */ -int _omap_hwmod_enable(struct omap_hwmod *oh) +static int _enable(struct omap_hwmod *oh) { int r; + int hwsup = 0; + + pr_debug("omap_hwmod: %s: enabling\n", oh->name); + + /* + * hwmods with HWMOD_INIT_NO_IDLE flag set are left in enabled + * state at init. Now that someone is really trying to enable + * them, just ensure that the hwmod mux is set. + */ + if (oh->_int_flags & _HWMOD_SKIP_ENABLE) { + /* + * If the caller has mux data populated, do the mux'ing + * which wouldn't have been done as part of the _enable() + * done during setup. + */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); + + oh->_int_flags &= ~_HWMOD_SKIP_ENABLE; + return 0; + } if (oh->_state != _HWMOD_STATE_INITIALIZED && oh->_state != _HWMOD_STATE_IDLE && oh->_state != _HWMOD_STATE_DISABLED) { - WARN(1, "omap_hwmod: %s: enabled state can only be entered " - "from initialized, idle, or disabled state\n", oh->name); + WARN(1, "omap_hwmod: %s: enabled state can only be entered from initialized, idle, or disabled state\n", + oh->name); return -EINVAL; } - pr_debug("omap_hwmod: %s: enabling\n", oh->name); - /* - * If an IP contains only one HW reset line, then de-assert it in order - * to allow to enable the clocks. Otherwise the PRCM will return - * Intransition status, and the init will failed. + * If an IP block contains HW reset lines and all of them are + * asserted, we let integration code associated with that + * block handle the enable. We've received very little + * information on what those driver authors need, and until + * detailed information is provided and the driver code is + * posted to the public lists, this is probably the best we + * can do. */ - if ((oh->_state == _HWMOD_STATE_INITIALIZED || - oh->_state == _HWMOD_STATE_DISABLED) && oh->rst_lines_cnt == 1) - _deassert_hardreset(oh, oh->rst_lines[0].name); + if (_are_all_hardreset_lines_asserted(oh)) + return 0; - /* XXX mux balls */ + /* Mux pins for device runtime if populated */ + if (oh->mux && (!oh->mux->enabled || + ((oh->_state == _HWMOD_STATE_IDLE) && + oh->mux->pads_dynamic))) { + omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED); + _reconfigure_io_chain(); + } _add_initiator_dep(oh, mpu_oh); + + if (oh->clkdm) { + /* + * A clockdomain must be in SW_SUP before enabling + * completely the module. The clockdomain can be set + * in HW_AUTO only when the module become ready. + */ + hwsup = clkdm_in_hwsup(oh->clkdm) && + !clkdm_missing_idle_reporting(oh->clkdm); + r = clkdm_hwmod_enable(oh->clkdm, oh); + if (r) { + WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n", + oh->name, oh->clkdm->name, r); + return r; + } + } + _enable_clocks(oh); + if (soc_ops.enable_module) + soc_ops.enable_module(oh); + if (oh->flags & HWMOD_BLOCK_WFI) + cpu_idle_poll_ctrl(true); - r = _wait_target_ready(oh); + if (soc_ops.update_context_lost) + soc_ops.update_context_lost(oh); + + r = (soc_ops.wait_target_ready) ? soc_ops.wait_target_ready(oh) : + -EINVAL; if (!r) { + /* + * Set the clockdomain to HW_AUTO only if the target is ready, + * assuming that the previous state was HW_AUTO + */ + if (oh->clkdm && hwsup) + clkdm_allow_idle(oh->clkdm); + oh->_state = _HWMOD_STATE_ENABLED; /* Access the sysconfig only if the target is ready */ @@ -1212,38 +2232,66 @@ int _omap_hwmod_enable(struct omap_hwmod *oh) _update_sysc_cache(oh); _enable_sysc(oh); } + r = _enable_preprogram(oh); } else { + if (soc_ops.disable_module) + soc_ops.disable_module(oh); + _disable_clocks(oh); pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n", oh->name, r); + + if (oh->clkdm) + clkdm_hwmod_disable(oh->clkdm, oh); } return r; } /** - * _omap_hwmod_idle - idle an omap_hwmod + * _idle - idle an omap_hwmod * @oh: struct omap_hwmod * * * Idles an omap_hwmod @oh. This should be called once the hwmod has - * no further work. (This function has a full name -- - * _omap_hwmod_idle() rather than simply _idle() -- because it is - * currently required by the pm34xx.c idle loop.) Returns -EINVAL if - * the hwmod is in the wrong state or returns 0. + * no further work. Returns -EINVAL if the hwmod is in the wrong + * state or returns 0. */ -int _omap_hwmod_idle(struct omap_hwmod *oh) +static int _idle(struct omap_hwmod *oh) { + pr_debug("omap_hwmod: %s: idling\n", oh->name); + if (oh->_state != _HWMOD_STATE_ENABLED) { - WARN(1, "omap_hwmod: %s: idle state can only be entered from " - "enabled state\n", oh->name); + WARN(1, "omap_hwmod: %s: idle state can only be entered from enabled state\n", + oh->name); return -EINVAL; } - pr_debug("omap_hwmod: %s: idling\n", oh->name); + if (_are_all_hardreset_lines_asserted(oh)) + return 0; if (oh->class->sysc) _idle_sysc(oh); _del_initiator_dep(oh, mpu_oh); + + if (oh->flags & HWMOD_BLOCK_WFI) + cpu_idle_poll_ctrl(false); + if (soc_ops.disable_module) + soc_ops.disable_module(oh); + + /* + * The module must be in idle mode before disabling any parents + * clocks. Otherwise, the parent clock might be disabled before + * the module transition is done, and thus will prevent the + * transition to complete properly. + */ _disable_clocks(oh); + if (oh->clkdm) + clkdm_hwmod_disable(oh->clkdm, oh); + + /* Mux pins for device idle if populated */ + if (oh->mux && oh->mux->pads_dynamic) { + omap_hwmod_mux(oh->mux, _HWMOD_STATE_IDLE); + _reconfigure_io_chain(); + } oh->_state = _HWMOD_STATE_IDLE; @@ -1261,173 +2309,422 @@ int _omap_hwmod_idle(struct omap_hwmod *oh) */ static int _shutdown(struct omap_hwmod *oh) { + int ret, i; + u8 prev_state; + if (oh->_state != _HWMOD_STATE_IDLE && oh->_state != _HWMOD_STATE_ENABLED) { - WARN(1, "omap_hwmod: %s: disabled state can only be entered " - "from idle, or enabled state\n", oh->name); + WARN(1, "omap_hwmod: %s: disabled state can only be entered from idle, or enabled state\n", + oh->name); return -EINVAL; } + if (_are_all_hardreset_lines_asserted(oh)) + return 0; + pr_debug("omap_hwmod: %s: disabling\n", oh->name); - if (oh->class->sysc) - _shutdown_sysc(oh); + if (oh->class->pre_shutdown) { + prev_state = oh->_state; + if (oh->_state == _HWMOD_STATE_IDLE) + _enable(oh); + ret = oh->class->pre_shutdown(oh); + if (ret) { + if (prev_state == _HWMOD_STATE_IDLE) + _idle(oh); + return ret; + } + } - /* - * If an IP contains only one HW reset line, then assert it - * before disabling the clocks and shutting down the IP. - */ - if (oh->rst_lines_cnt == 1) - _assert_hardreset(oh, oh->rst_lines[0].name); + if (oh->class->sysc) { + if (oh->_state == _HWMOD_STATE_IDLE) + _enable(oh); + _shutdown_sysc(oh); + } /* clocks and deps are already disabled in idle */ if (oh->_state == _HWMOD_STATE_ENABLED) { _del_initiator_dep(oh, mpu_oh); /* XXX what about the other system initiators here? dma, dsp */ + if (oh->flags & HWMOD_BLOCK_WFI) + cpu_idle_poll_ctrl(false); + if (soc_ops.disable_module) + soc_ops.disable_module(oh); _disable_clocks(oh); + if (oh->clkdm) + clkdm_hwmod_disable(oh->clkdm, oh); } /* XXX Should this code also force-disable the optional clocks? */ - /* XXX mux any associated balls to safe mode */ + for (i = 0; i < oh->rst_lines_cnt; i++) + _assert_hardreset(oh, oh->rst_lines[i].name); + + /* Mux pins to safe mode or use populated off mode values */ + if (oh->mux) + omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED); oh->_state = _HWMOD_STATE_DISABLED; return 0; } +static int of_dev_find_hwmod(struct device_node *np, + struct omap_hwmod *oh) +{ + int count, i, res; + const char *p; + + count = of_property_count_strings(np, "ti,hwmods"); + if (count < 1) + return -ENODEV; + + for (i = 0; i < count; i++) { + res = of_property_read_string_index(np, "ti,hwmods", + i, &p); + if (res) + continue; + if (!strcmp(p, oh->name)) { + pr_debug("omap_hwmod: dt %s[%i] uses hwmod %s\n", + np->name, i, oh->name); + return i; + } + } + + return -ENODEV; +} + /** - * _setup - do initial configuration of omap_hwmod + * of_dev_hwmod_lookup - look up needed hwmod from dt blob + * @np: struct device_node * * @oh: struct omap_hwmod * - * @skip_setup_idle_p: do not idle hwmods at the end of the fn if 1 + * @index: index of the entry found + * @found: struct device_node * found or NULL * - * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh - * OCP_SYSCONFIG register. @skip_setup_idle is intended to be used on - * a system that will not call omap_hwmod_enable() to enable devices - * (e.g., a system without PM runtime). Returns -EINVAL if the hwmod - * is in the wrong state or returns 0. + * Parse the dt blob and find out needed hwmod. Recursive function is + * implemented to take care hierarchical dt blob parsing. + * Return: Returns 0 on success, -ENODEV when not found. */ -static int _setup(struct omap_hwmod *oh, void *data) +static int of_dev_hwmod_lookup(struct device_node *np, + struct omap_hwmod *oh, + int *index, + struct device_node **found) { - int i, r; - u8 skip_setup_idle; + struct device_node *np0 = NULL; + int res; - if (!oh || !data) + res = of_dev_find_hwmod(np, oh); + if (res >= 0) { + *found = np; + *index = res; + return 0; + } + + for_each_child_of_node(np, np0) { + struct device_node *fc; + int i; + + res = of_dev_hwmod_lookup(np0, oh, &i, &fc); + if (res == 0) { + *found = fc; + *index = i; + return 0; + } + } + + *found = NULL; + *index = 0; + + return -ENODEV; +} + +/** + * _init_mpu_rt_base - populate the virtual address for a hwmod + * @oh: struct omap_hwmod * to locate the virtual address + * @data: (unused, caller should pass NULL) + * @index: index of the reg entry iospace in device tree + * @np: struct device_node * of the IP block's device node in the DT data + * + * Cache the virtual address used by the MPU to access this IP block's + * registers. This address is needed early so the OCP registers that + * are part of the device's address space can be ioremapped properly. + * + * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and + * -ENXIO on absent or invalid register target address space. + */ +static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data, + int index, struct device_node *np) +{ + struct omap_hwmod_addr_space *mem; + void __iomem *va_start = NULL; + + if (!oh) return -EINVAL; - skip_setup_idle = *(u8 *)data; + _save_mpu_port_index(oh); - /* Set iclk autoidle mode */ - if (oh->slaves_cnt > 0) { - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os = oh->slaves[i]; - struct clk *c = os->_clk; + if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + return -ENXIO; - if (!c) - continue; + mem = _find_mpu_rt_addr_space(oh); + if (!mem) { + pr_debug("omap_hwmod: %s: no MPU register target found\n", + oh->name); - if (os->flags & OCPIF_SWSUP_IDLE) { - /* XXX omap_iclk_deny_idle(c); */ - } else { - /* XXX omap_iclk_allow_idle(c); */ - clk_enable(c); - } - } + /* Extract the IO space from device tree blob */ + if (!np) + return -ENXIO; + + va_start = of_iomap(np, index + oh->mpu_rt_idx); + } else { + va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start); } - mutex_init(&oh->_mutex); - oh->_state = _HWMOD_STATE_INITIALIZED; + if (!va_start) { + if (mem) + pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name); + else + pr_err("omap_hwmod: %s: Missing dt reg%i for %s\n", + oh->name, index, np->full_name); + return -ENXIO; + } - /* - * In the case of hwmod with hardreset that should not be - * de-assert at boot time, we have to keep the module - * initialized, because we cannot enable it properly with the - * reset asserted. Exit without warning because that behavior is - * expected. - */ - if ((oh->flags & HWMOD_INIT_NO_RESET) && oh->rst_lines_cnt == 1) - return 0; + pr_debug("omap_hwmod: %s: MPU register target at va %p\n", + oh->name, va_start); - r = _omap_hwmod_enable(oh); - if (r) { - pr_warning("omap_hwmod: %s: cannot be enabled (%d)\n", - oh->name, oh->_state); + oh->_mpu_rt_va = va_start; + return 0; +} + +/** + * _init - initialize internal data for the hwmod @oh + * @oh: struct omap_hwmod * + * @n: (unused) + * + * Look up the clocks and the address space used by the MPU to access + * registers belonging to the hwmod @oh. @oh must already be + * registered at this point. This is the first of two phases for + * hwmod initialization. Code called here does not touch any hardware + * registers, it simply prepares internal data structures. Returns 0 + * upon success or if the hwmod isn't registered or if the hwmod's + * address space is not defined, or -EINVAL upon failure. + */ +static int __init _init(struct omap_hwmod *oh, void *data) +{ + int r, index; + struct device_node *np = NULL; + + if (oh->_state != _HWMOD_STATE_REGISTERED) return 0; - } - if (!(oh->flags & HWMOD_INIT_NO_RESET)) { - _reset(oh); + if (of_have_populated_dt()) { + struct device_node *bus; - /* - * OCP_SYSCONFIG bits need to be reprogrammed after a softreset. - * The _omap_hwmod_enable() function should be split to - * avoid the rewrite of the OCP_SYSCONFIG register. - */ - if (oh->class->sysc) { - _update_sysc_cache(oh); - _enable_sysc(oh); + bus = of_find_node_by_name(NULL, "ocp"); + if (!bus) + return -ENODEV; + + r = of_dev_hwmod_lookup(bus, oh, &index, &np); + if (r) + pr_debug("omap_hwmod: %s missing dt data\n", oh->name); + else if (np && index) + pr_warn("omap_hwmod: %s using broken dt data from %s\n", + oh->name, np->name); + } + + if (oh->class->sysc) { + r = _init_mpu_rt_base(oh, NULL, index, np); + if (r < 0) { + WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n", + oh->name); + return 0; } } - if (!(oh->flags & HWMOD_INIT_NO_IDLE) && !skip_setup_idle) - _omap_hwmod_idle(oh); + r = _init_clocks(oh, NULL); + if (r < 0) { + WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh->name); + return -EINVAL; + } + + if (np) { + if (of_find_property(np, "ti,no-reset-on-init", NULL)) + oh->flags |= HWMOD_INIT_NO_RESET; + if (of_find_property(np, "ti,no-idle-on-init", NULL)) + oh->flags |= HWMOD_INIT_NO_IDLE; + } + + oh->_state = _HWMOD_STATE_INITIALIZED; return 0; } +/** + * _setup_iclk_autoidle - configure an IP block's interface clocks + * @oh: struct omap_hwmod * + * + * Set up the module's interface clocks. XXX This function is still mostly + * a stub; implementing this properly requires iclk autoidle usecounting in + * the clock code. No return value. + */ +static void __init _setup_iclk_autoidle(struct omap_hwmod *oh) +{ + struct omap_hwmod_ocp_if *os; + struct list_head *p; + int i = 0; + if (oh->_state != _HWMOD_STATE_INITIALIZED) + return; + p = oh->slave_ports.next; -/* Public functions */ + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + if (!os->_clk) + continue; -u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs) -{ - if (oh->flags & HWMOD_16BIT_REG) - return __raw_readw(oh->_mpu_rt_va + reg_offs); - else - return __raw_readl(oh->_mpu_rt_va + reg_offs); + if (os->flags & OCPIF_SWSUP_IDLE) { + /* XXX omap_iclk_deny_idle(c); */ + } else { + /* XXX omap_iclk_allow_idle(c); */ + clk_enable(os->_clk); + } + } + + return; } -void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs) +/** + * _setup_reset - reset an IP block during the setup process + * @oh: struct omap_hwmod * + * + * Reset the IP block corresponding to the hwmod @oh during the setup + * process. The IP block is first enabled so it can be successfully + * reset. Returns 0 upon success or a negative error code upon + * failure. + */ +static int __init _setup_reset(struct omap_hwmod *oh) { - if (oh->flags & HWMOD_16BIT_REG) - __raw_writew(v, oh->_mpu_rt_va + reg_offs); - else - __raw_writel(v, oh->_mpu_rt_va + reg_offs); + int r; + + if (oh->_state != _HWMOD_STATE_INITIALIZED) + return -EINVAL; + + if (oh->flags & HWMOD_EXT_OPT_MAIN_CLK) + return -EPERM; + + if (oh->rst_lines_cnt == 0) { + r = _enable(oh); + if (r) { + pr_warning("omap_hwmod: %s: cannot be enabled for reset (%d)\n", + oh->name, oh->_state); + return -EINVAL; + } + } + + if (!(oh->flags & HWMOD_INIT_NO_RESET)) + r = _reset(oh); + + return r; } /** - * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode + * _setup_postsetup - transition to the appropriate state after _setup * @oh: struct omap_hwmod * - * @idlemode: SIDLEMODE field bits (shifted to bit 0) * - * Sets the IP block's OCP slave idlemode in hardware, and updates our - * local copy. Intended to be used by drivers that have some erratum - * that requires direct manipulation of the SIDLEMODE bits. Returns - * -EINVAL if @oh is null, or passes along the return value from - * _set_slave_idlemode(). + * Place an IP block represented by @oh into a "post-setup" state -- + * either IDLE, ENABLED, or DISABLED. ("post-setup" simply means that + * this function is called at the end of _setup().) The postsetup + * state for an IP block can be changed by calling + * omap_hwmod_enter_postsetup_state() early in the boot process, + * before one of the omap_hwmod_setup*() functions are called for the + * IP block. + * + * The IP block stays in this state until a PM runtime-based driver is + * loaded for that IP block. A post-setup state of IDLE is + * appropriate for almost all IP blocks with runtime PM-enabled + * drivers, since those drivers are able to enable the IP block. A + * post-setup state of ENABLED is appropriate for kernels with PM + * runtime disabled. The DISABLED state is appropriate for unusual IP + * blocks such as the MPU WDTIMER on kernels without WDTIMER drivers + * included, since the WDTIMER starts running on reset and will reset + * the MPU if left active. * - * XXX Does this function have any current users? If not, we should - * remove it; it is better to let the rest of the hwmod code handle this. - * Any users of this function should be scrutinized carefully. + * This post-setup mechanism is deprecated. Once all of the OMAP + * drivers have been converted to use PM runtime, and all of the IP + * block data and interconnect data is available to the hwmod code, it + * should be possible to replace this mechanism with a "lazy reset" + * arrangement. In a "lazy reset" setup, each IP block is enabled + * when the driver first probes, then all remaining IP blocks without + * drivers are either shut down or enabled after the drivers have + * loaded. However, this cannot take place until the above + * preconditions have been met, since otherwise the late reset code + * has no way of knowing which IP blocks are in use by drivers, and + * which ones are unused. + * + * No return value. */ -int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) +static void __init _setup_postsetup(struct omap_hwmod *oh) { - u32 v; - int retval = 0; + u8 postsetup_state; - if (!oh) - return -EINVAL; + if (oh->rst_lines_cnt > 0) + return; - v = oh->_sysc_cache; + postsetup_state = oh->_postsetup_state; + if (postsetup_state == _HWMOD_STATE_UNKNOWN) + postsetup_state = _HWMOD_STATE_ENABLED; - retval = _set_slave_idlemode(oh, idlemode, &v); - if (!retval) - _write_sysconfig(v, oh); + /* + * XXX HWMOD_INIT_NO_IDLE does not belong in hwmod data - + * it should be set by the core code as a runtime flag during startup + */ + if ((oh->flags & HWMOD_INIT_NO_IDLE) && + (postsetup_state == _HWMOD_STATE_IDLE)) { + oh->_int_flags |= _HWMOD_SKIP_ENABLE; + postsetup_state = _HWMOD_STATE_ENABLED; + } + + if (postsetup_state == _HWMOD_STATE_IDLE) + _idle(oh); + else if (postsetup_state == _HWMOD_STATE_DISABLED) + _shutdown(oh); + else if (postsetup_state != _HWMOD_STATE_ENABLED) + WARN(1, "hwmod: %s: unknown postsetup state %d! defaulting to enabled\n", + oh->name, postsetup_state); + + return; +} + +/** + * _setup - prepare IP block hardware for use + * @oh: struct omap_hwmod * + * @n: (unused, pass NULL) + * + * Configure the IP block represented by @oh. This may include + * enabling the IP block, resetting it, and placing it into a + * post-setup state, depending on the type of IP block and applicable + * flags. IP blocks are reset to prevent any previous configuration + * by the bootloader or previous operating system from interfering + * with power management or other parts of the system. The reset can + * be avoided; see omap_hwmod_no_setup_reset(). This is the second of + * two phases for hwmod initialization. Code called here generally + * affects the IP block hardware, or system integration hardware + * associated with the IP block. Returns 0. + */ +static int __init _setup(struct omap_hwmod *oh, void *data) +{ + if (oh->_state != _HWMOD_STATE_INITIALIZED) + return 0; + + _setup_iclk_autoidle(oh); + + if (!_setup_reset(oh)) + _setup_postsetup(oh); - return retval; + return 0; } /** - * omap_hwmod_register - register a struct omap_hwmod + * _register - register a struct omap_hwmod * @oh: struct omap_hwmod * * * Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod @@ -1443,39 +2740,538 @@ int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) * that the copy process would be relatively complex due to the large number * of substructures. */ -int omap_hwmod_register(struct omap_hwmod *oh) +static int __init _register(struct omap_hwmod *oh) { - int ret, ms_id; - if (!oh || !oh->name || !oh->class || !oh->class->name || (oh->_state != _HWMOD_STATE_UNKNOWN)) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); - pr_debug("omap_hwmod: %s: registering\n", oh->name); - if (_lookup(oh->name)) { - ret = -EEXIST; - goto ohr_unlock; + if (_lookup(oh->name)) + return -EEXIST; + + list_add_tail(&oh->node, &omap_hwmod_list); + + INIT_LIST_HEAD(&oh->master_ports); + INIT_LIST_HEAD(&oh->slave_ports); + spin_lock_init(&oh->_lock); + + oh->_state = _HWMOD_STATE_REGISTERED; + + /* + * XXX Rather than doing a strcmp(), this should test a flag + * set in the hwmod data, inserted by the autogenerator code. + */ + if (!strcmp(oh->name, MPU_INITIATOR_NAME)) + mpu_oh = oh; + + return 0; +} + +/** + * _alloc_links - return allocated memory for hwmod links + * @ml: pointer to a struct omap_hwmod_link * for the master link + * @sl: pointer to a struct omap_hwmod_link * for the slave link + * + * Return pointers to two struct omap_hwmod_link records, via the + * addresses pointed to by @ml and @sl. Will first attempt to return + * memory allocated as part of a large initial block, but if that has + * been exhausted, will allocate memory itself. Since ideally this + * second allocation path will never occur, the number of these + * 'supplemental' allocations will be logged when debugging is + * enabled. Returns 0. + */ +static int __init _alloc_links(struct omap_hwmod_link **ml, + struct omap_hwmod_link **sl) +{ + unsigned int sz; + + if ((free_ls + LINKS_PER_OCP_IF) <= max_ls) { + *ml = &linkspace[free_ls++]; + *sl = &linkspace[free_ls++]; + return 0; } - ms_id = _find_mpu_port_index(oh); - if (!IS_ERR_VALUE(ms_id)) { - oh->_mpu_port_index = ms_id; - oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); - } else { - oh->_int_flags |= _HWMOD_NO_MPU_PORT; + sz = sizeof(struct omap_hwmod_link) * LINKS_PER_OCP_IF; + + *sl = NULL; + *ml = memblock_virt_alloc(sz, 0); + + *sl = (void *)(*ml) + sizeof(struct omap_hwmod_link); + + ls_supp++; + pr_debug("omap_hwmod: supplemental link allocations needed: %d\n", + ls_supp * LINKS_PER_OCP_IF); + + return 0; +}; + +/** + * _add_link - add an interconnect between two IP blocks + * @oi: pointer to a struct omap_hwmod_ocp_if record + * + * Add struct omap_hwmod_link records connecting the master IP block + * specified in @oi->master to @oi, and connecting the slave IP block + * specified in @oi->slave to @oi. This code is assumed to run before + * preemption or SMP has been enabled, thus avoiding the need for + * locking in this code. Changes to this assumption will require + * additional locking. Returns 0. + */ +static int __init _add_link(struct omap_hwmod_ocp_if *oi) +{ + struct omap_hwmod_link *ml, *sl; + + pr_debug("omap_hwmod: %s -> %s: adding link\n", oi->master->name, + oi->slave->name); + + _alloc_links(&ml, &sl); + + ml->ocp_if = oi; + INIT_LIST_HEAD(&ml->node); + list_add(&ml->node, &oi->master->master_ports); + oi->master->masters_cnt++; + + sl->ocp_if = oi; + INIT_LIST_HEAD(&sl->node); + list_add(&sl->node, &oi->slave->slave_ports); + oi->slave->slaves_cnt++; + + return 0; +} + +/** + * _register_link - register a struct omap_hwmod_ocp_if + * @oi: struct omap_hwmod_ocp_if * + * + * Registers the omap_hwmod_ocp_if record @oi. Returns -EEXIST if it + * has already been registered; -EINVAL if @oi is NULL or if the + * record pointed to by @oi is missing required fields; or 0 upon + * success. + * + * XXX The data should be copied into bootmem, so the original data + * should be marked __initdata and freed after init. This would allow + * unneeded omap_hwmods to be freed on multi-OMAP configurations. + */ +static int __init _register_link(struct omap_hwmod_ocp_if *oi) +{ + if (!oi || !oi->master || !oi->slave || !oi->user) + return -EINVAL; + + if (oi->_int_flags & _OCPIF_INT_FLAGS_REGISTERED) + return -EEXIST; + + pr_debug("omap_hwmod: registering link from %s to %s\n", + oi->master->name, oi->slave->name); + + /* + * Register the connected hwmods, if they haven't been + * registered already + */ + if (oi->master->_state != _HWMOD_STATE_REGISTERED) + _register(oi->master); + + if (oi->slave->_state != _HWMOD_STATE_REGISTERED) + _register(oi->slave); + + _add_link(oi); + + oi->_int_flags |= _OCPIF_INT_FLAGS_REGISTERED; + + return 0; +} + +/** + * _alloc_linkspace - allocate large block of hwmod links + * @ois: pointer to an array of struct omap_hwmod_ocp_if records to count + * + * Allocate a large block of struct omap_hwmod_link records. This + * improves boot time significantly by avoiding the need to allocate + * individual records one by one. If the number of records to + * allocate in the block hasn't been manually specified, this function + * will count the number of struct omap_hwmod_ocp_if records in @ois + * and use that to determine the allocation size. For SoC families + * that require multiple list registrations, such as OMAP3xxx, this + * estimation process isn't optimal, so manual estimation is advised + * in those cases. Returns -EEXIST if the allocation has already occurred + * or 0 upon success. + */ +static int __init _alloc_linkspace(struct omap_hwmod_ocp_if **ois) +{ + unsigned int i = 0; + unsigned int sz; + + if (linkspace) { + WARN(1, "linkspace already allocated\n"); + return -EEXIST; } - list_add_tail(&oh->node, &omap_hwmod_list); + if (max_ls == 0) + while (ois[i++]) + max_ls += LINKS_PER_OCP_IF; - oh->_state = _HWMOD_STATE_REGISTERED; + sz = sizeof(struct omap_hwmod_link) * max_ls; - ret = 0; + pr_debug("omap_hwmod: %s: allocating %d byte linkspace (%d links)\n", + __func__, sz, max_ls); + + linkspace = memblock_virt_alloc(sz, 0); + + return 0; +} + +/* Static functions intended only for use in soc_ops field function pointers */ + +/** + * _omap2xxx_wait_target_ready - wait for a module to leave slave idle + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to leave slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully leaves + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_ready() function. + */ +static int _omap2xxx_wait_target_ready(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + if (!_find_mpu_rt_port(oh)) + return 0; + + /* XXX check module SIDLEMODE, hardreset status, enabled clocks */ + + return omap2xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs, + oh->prcm.omap2.idlest_reg_id, + oh->prcm.omap2.idlest_idle_bit); +} -ohr_unlock: - mutex_unlock(&omap_hwmod_mutex); +/** + * _omap3xxx_wait_target_ready - wait for a module to leave slave idle + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to leave slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully leaves + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_ready() function. + */ +static int _omap3xxx_wait_target_ready(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + if (!_find_mpu_rt_port(oh)) + return 0; + + /* XXX check module SIDLEMODE, hardreset status, enabled clocks */ + + return omap3xxx_cm_wait_module_ready(oh->prcm.omap2.module_offs, + oh->prcm.omap2.idlest_reg_id, + oh->prcm.omap2.idlest_idle_bit); +} + +/** + * _omap4_wait_target_ready - wait for a module to leave slave idle + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to leave slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully leaves + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_ready() function. + */ +static int _omap4_wait_target_ready(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->flags & HWMOD_NO_IDLEST || !oh->clkdm) + return 0; + + if (!_find_mpu_rt_port(oh)) + return 0; + + /* XXX check module SIDLEMODE, hardreset status */ + + return omap4_cminst_wait_module_ready(oh->clkdm->prcm_partition, + oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _am33xx_wait_target_ready - wait for a module to leave slave idle + * @oh: struct omap_hwmod * + * + * Wait for a module @oh to leave slave idle. Returns 0 if the module + * does not have an IDLEST bit or if the module successfully leaves + * slave idle; otherwise, pass along the return value of the + * appropriate *_cm*_wait_module_ready() function. + */ +static int _am33xx_wait_target_ready(struct omap_hwmod *oh) +{ + if (!oh || !oh->clkdm) + return -EINVAL; + + if (oh->flags & HWMOD_NO_IDLEST) + return 0; + + if (!_find_mpu_rt_port(oh)) + return 0; + + /* XXX check module SIDLEMODE, hardreset status */ + + return am33xx_cm_wait_module_ready(oh->clkdm->cm_inst, + oh->clkdm->clkdm_offs, + oh->prcm.omap4.clkctrl_offs); +} + +/** + * _omap2_assert_hardreset - call OMAP2 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to assert hardreset + * @ohri: hardreset line data + * + * Call omap2_prm_assert_hardreset() with parameters extracted from + * the hwmod @oh and the hardreset line data @ohri. Only intended for + * use as an soc_ops function pointer. Passes along the return value + * from omap2_prm_assert_hardreset(). XXX This function is scheduled + * for removal when the PRM code is moved into drivers/. + */ +static int _omap2_assert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs, + ohri->rst_shift); +} + +/** + * _omap2_deassert_hardreset - call OMAP2 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to deassert hardreset + * @ohri: hardreset line data + * + * Call omap2_prm_deassert_hardreset() with parameters extracted from + * the hwmod @oh and the hardreset line data @ohri. Only intended for + * use as an soc_ops function pointer. Passes along the return value + * from omap2_prm_deassert_hardreset(). XXX This function is + * scheduled for removal when the PRM code is moved into drivers/. + */ +static int _omap2_deassert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + return omap2_prm_deassert_hardreset(oh->prcm.omap2.module_offs, + ohri->rst_shift, + ohri->st_shift); +} + +/** + * _omap2_is_hardreset_asserted - call OMAP2 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to test hardreset + * @ohri: hardreset line data + * + * Call omap2_prm_is_hardreset_asserted() with parameters extracted + * from the hwmod @oh and the hardreset line data @ohri. Only + * intended for use as an soc_ops function pointer. Passes along the + * return value from omap2_prm_is_hardreset_asserted(). XXX This + * function is scheduled for removal when the PRM code is moved into + * drivers/. + */ +static int _omap2_is_hardreset_asserted(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs, + ohri->st_shift); +} + +/** + * _omap4_assert_hardreset - call OMAP4 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to assert hardreset + * @ohri: hardreset line data + * + * Call omap4_prminst_assert_hardreset() with parameters extracted + * from the hwmod @oh and the hardreset line data @ohri. Only + * intended for use as an soc_ops function pointer. Passes along the + * return value from omap4_prminst_assert_hardreset(). XXX This + * function is scheduled for removal when the PRM code is moved into + * drivers/. + */ +static int _omap4_assert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + if (!oh->clkdm) + return -EINVAL; + + return omap4_prminst_assert_hardreset(ohri->rst_shift, + oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); +} + +/** + * _omap4_deassert_hardreset - call OMAP4 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to deassert hardreset + * @ohri: hardreset line data + * + * Call omap4_prminst_deassert_hardreset() with parameters extracted + * from the hwmod @oh and the hardreset line data @ohri. Only + * intended for use as an soc_ops function pointer. Passes along the + * return value from omap4_prminst_deassert_hardreset(). XXX This + * function is scheduled for removal when the PRM code is moved into + * drivers/. + */ +static int _omap4_deassert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + if (!oh->clkdm) + return -EINVAL; + + if (ohri->st_shift) + pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n", + oh->name, ohri->name); + return omap4_prminst_deassert_hardreset(ohri->rst_shift, + oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); +} + +/** + * _omap4_is_hardreset_asserted - call OMAP4 PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to test hardreset + * @ohri: hardreset line data + * + * Call omap4_prminst_is_hardreset_asserted() with parameters + * extracted from the hwmod @oh and the hardreset line data @ohri. + * Only intended for use as an soc_ops function pointer. Passes along + * the return value from omap4_prminst_is_hardreset_asserted(). XXX + * This function is scheduled for removal when the PRM code is moved + * into drivers/. + */ +static int _omap4_is_hardreset_asserted(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + if (!oh->clkdm) + return -EINVAL; + + return omap4_prminst_is_hardreset_asserted(ohri->rst_shift, + oh->clkdm->pwrdm.ptr->prcm_partition, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); +} + +/** + * _am33xx_assert_hardreset - call AM33XX PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to assert hardreset + * @ohri: hardreset line data + * + * Call am33xx_prminst_assert_hardreset() with parameters extracted + * from the hwmod @oh and the hardreset line data @ohri. Only + * intended for use as an soc_ops function pointer. Passes along the + * return value from am33xx_prminst_assert_hardreset(). XXX This + * function is scheduled for removal when the PRM code is moved into + * drivers/. + */ +static int _am33xx_assert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) + +{ + return am33xx_prm_assert_hardreset(ohri->rst_shift, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); +} + +/** + * _am33xx_deassert_hardreset - call AM33XX PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to deassert hardreset + * @ohri: hardreset line data + * + * Call am33xx_prminst_deassert_hardreset() with parameters extracted + * from the hwmod @oh and the hardreset line data @ohri. Only + * intended for use as an soc_ops function pointer. Passes along the + * return value from am33xx_prminst_deassert_hardreset(). XXX This + * function is scheduled for removal when the PRM code is moved into + * drivers/. + */ +static int _am33xx_deassert_hardreset(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + return am33xx_prm_deassert_hardreset(ohri->rst_shift, + ohri->st_shift, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs, + oh->prcm.omap4.rstst_offs); +} + +/** + * _am33xx_is_hardreset_asserted - call AM33XX PRM hardreset fn with hwmod args + * @oh: struct omap_hwmod * to test hardreset + * @ohri: hardreset line data + * + * Call am33xx_prminst_is_hardreset_asserted() with parameters + * extracted from the hwmod @oh and the hardreset line data @ohri. + * Only intended for use as an soc_ops function pointer. Passes along + * the return value from am33xx_prminst_is_hardreset_asserted(). XXX + * This function is scheduled for removal when the PRM code is moved + * into drivers/. + */ +static int _am33xx_is_hardreset_asserted(struct omap_hwmod *oh, + struct omap_hwmod_rst_info *ohri) +{ + return am33xx_prm_is_hardreset_asserted(ohri->rst_shift, + oh->clkdm->pwrdm.ptr->prcm_offs, + oh->prcm.omap4.rstctrl_offs); +} + +/* Public functions */ + +u32 omap_hwmod_read(struct omap_hwmod *oh, u16 reg_offs) +{ + if (oh->flags & HWMOD_16BIT_REG) + return readw_relaxed(oh->_mpu_rt_va + reg_offs); + else + return readl_relaxed(oh->_mpu_rt_va + reg_offs); +} + +void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs) +{ + if (oh->flags & HWMOD_16BIT_REG) + writew_relaxed(v, oh->_mpu_rt_va + reg_offs); + else + writel_relaxed(v, oh->_mpu_rt_va + reg_offs); +} + +/** + * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit + * @oh: struct omap_hwmod * + * + * This is a public function exposed to drivers. Some drivers may need to do + * some settings before and after resetting the device. Those drivers after + * doing the necessary settings could use this function to start a reset by + * setting the SYSCONFIG.SOFTRESET bit. + */ +int omap_hwmod_softreset(struct omap_hwmod *oh) +{ + u32 v; + int ret; + + if (!oh || !(oh->_sysc_cache)) + return -EINVAL; + + v = oh->_sysc_cache; + ret = _set_softreset(oh, &v); + if (ret) + goto error; + _write_sysconfig(v, oh); + + ret = _clear_softreset(oh, &v); + if (ret) + goto error; + _write_sysconfig(v, oh); + +error: return ret; } @@ -1493,9 +3289,7 @@ struct omap_hwmod *omap_hwmod_lookup(const char *name) if (!name) return NULL; - mutex_lock(&omap_hwmod_mutex); oh = _lookup(name); - mutex_unlock(&omap_hwmod_mutex); return oh; } @@ -1516,111 +3310,127 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data), void *data) { struct omap_hwmod *temp_oh; - int ret; + int ret = 0; if (!fn) return -EINVAL; - mutex_lock(&omap_hwmod_mutex); list_for_each_entry(temp_oh, &omap_hwmod_list, node) { ret = (*fn)(temp_oh, data); if (ret) break; } - mutex_unlock(&omap_hwmod_mutex); return ret; } - /** - * omap_hwmod_init - init omap_hwmod code and register hwmods - * @ohs: pointer to an array of omap_hwmods to register + * omap_hwmod_register_links - register an array of hwmod links + * @ois: pointer to an array of omap_hwmod_ocp_if to register * * Intended to be called early in boot before the clock framework is - * initialized. If @ohs is not null, will register all omap_hwmods - * listed in @ohs that are valid for this chip. Returns -EINVAL if - * omap_hwmod_init() has already been called or 0 otherwise. + * initialized. If @ois is not null, will register all omap_hwmods + * listed in @ois that are valid for this chip. Returns -EINVAL if + * omap_hwmod_init() hasn't been called before calling this function, + * -ENOMEM if the link memory area can't be allocated, or 0 upon + * success. */ -int omap_hwmod_init(struct omap_hwmod **ohs) +int __init omap_hwmod_register_links(struct omap_hwmod_ocp_if **ois) { - struct omap_hwmod *oh; - int r; + int r, i; - if (inited) + if (!inited) return -EINVAL; - inited = 1; - - if (!ohs) + if (!ois) return 0; - oh = *ohs; - while (oh) { - if (omap_chip_is(oh->omap_chip)) { - r = omap_hwmod_register(oh); - WARN(r, "omap_hwmod: %s: omap_hwmod_register returned " - "%d\n", oh->name, r); + if (!linkspace) { + if (_alloc_linkspace(ois)) { + pr_err("omap_hwmod: could not allocate link space\n"); + return -ENOMEM; } - oh = *++ohs; } + i = 0; + do { + r = _register_link(ois[i]); + WARN(r && r != -EEXIST, + "omap_hwmod: _register_link(%s -> %s) returned %d\n", + ois[i]->master->name, ois[i]->slave->name, r); + } while (ois[++i]); + return 0; } /** - * omap_hwmod_late_init - do some post-clock framework initialization - * @skip_setup_idle: if 1, do not idle hwmods in _setup() + * _ensure_mpu_hwmod_is_setup - ensure the MPU SS hwmod is init'ed and set up + * @oh: pointer to the hwmod currently being set up (usually not the MPU) * - * Must be called after omap2_clk_init(). Resolves the struct clk names - * to struct clk pointers for each registered omap_hwmod. Also calls - * _setup() on each hwmod. Returns 0. + * If the hwmod data corresponding to the MPU subsystem IP block + * hasn't been initialized and set up yet, do so now. This must be + * done first since sleep dependencies may be added from other hwmods + * to the MPU. Intended to be called only by omap_hwmod_setup*(). No + * return value. */ -int omap_hwmod_late_init(u8 skip_setup_idle) +static void __init _ensure_mpu_hwmod_is_setup(struct omap_hwmod *oh) { - int r; + if (!mpu_oh || mpu_oh->_state == _HWMOD_STATE_UNKNOWN) + pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n", + __func__, MPU_INITIATOR_NAME); + else if (mpu_oh->_state == _HWMOD_STATE_REGISTERED && oh != mpu_oh) + omap_hwmod_setup_one(MPU_INITIATOR_NAME); +} + +/** + * omap_hwmod_setup_one - set up a single hwmod + * @oh_name: const char * name of the already-registered hwmod to set up + * + * Initialize and set up a single hwmod. Intended to be used for a + * small number of early devices, such as the timer IP blocks used for + * the scheduler clock. Must be called after omap2_clk_init(). + * Resolves the struct clk names to struct clk pointers for each + * registered omap_hwmod. Also calls _setup() on each hwmod. Returns + * -EINVAL upon error or 0 upon success. + */ +int __init omap_hwmod_setup_one(const char *oh_name) +{ + struct omap_hwmod *oh; - /* XXX check return value */ - r = omap_hwmod_for_each(_init_clocks, NULL); - WARN(r, "omap_hwmod: omap_hwmod_late_init(): _init_clocks failed\n"); + pr_debug("omap_hwmod: %s: %s\n", oh_name, __func__); - mpu_oh = omap_hwmod_lookup(MPU_INITIATOR_NAME); - WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n", - MPU_INITIATOR_NAME); + oh = _lookup(oh_name); + if (!oh) { + WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name); + return -EINVAL; + } - if (skip_setup_idle) - pr_debug("omap_hwmod: will leave hwmods enabled during setup\n"); + _ensure_mpu_hwmod_is_setup(oh); - omap_hwmod_for_each(_setup, &skip_setup_idle); + _init(oh, NULL); + _setup(oh, NULL); return 0; } /** - * omap_hwmod_unregister - unregister an omap_hwmod - * @oh: struct omap_hwmod * - * - * Unregisters a previously-registered omap_hwmod @oh. There's probably - * no use case for this, so it is likely to be removed in a later version. + * omap_hwmod_setup_all - set up all registered IP blocks * - * XXX Free all of the bootmem-allocated structures here when that is - * implemented. Make it clear that core code is the only code that is - * expected to unregister modules. + * Initialize and set up all IP blocks registered with the hwmod code. + * Must be called after omap2_clk_init(). Resolves the struct clk + * names to struct clk pointers for each registered omap_hwmod. Also + * calls _setup() on each hwmod. Returns 0 upon success. */ -int omap_hwmod_unregister(struct omap_hwmod *oh) +static int __init omap_hwmod_setup_all(void) { - if (!oh) - return -EINVAL; + _ensure_mpu_hwmod_is_setup(NULL); - pr_debug("omap_hwmod: %s: unregistering\n", oh->name); - - mutex_lock(&omap_hwmod_mutex); - iounmap(oh->_mpu_rt_va); - list_del(&oh->node); - mutex_unlock(&omap_hwmod_mutex); + omap_hwmod_for_each(_init, NULL); + omap_hwmod_for_each(_setup, NULL); return 0; } +omap_core_initcall(omap_hwmod_setup_all); /** * omap_hwmod_enable - enable an omap_hwmod @@ -1632,18 +3442,18 @@ int omap_hwmod_unregister(struct omap_hwmod *oh) int omap_hwmod_enable(struct omap_hwmod *oh) { int r; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); - r = _omap_hwmod_enable(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + r = _enable(oh); + spin_unlock_irqrestore(&oh->_lock, flags); return r; } - /** * omap_hwmod_idle - idle an omap_hwmod * @oh: struct omap_hwmod * @@ -1653,12 +3463,14 @@ int omap_hwmod_enable(struct omap_hwmod *oh) */ int omap_hwmod_idle(struct omap_hwmod *oh) { + unsigned long flags; + if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); - _omap_hwmod_idle(oh); - mutex_unlock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); + _idle(oh); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1673,12 +3485,14 @@ int omap_hwmod_idle(struct omap_hwmod *oh) */ int omap_hwmod_shutdown(struct omap_hwmod *oh) { + unsigned long flags; + if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); _shutdown(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1691,9 +3505,11 @@ int omap_hwmod_shutdown(struct omap_hwmod *oh) */ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) { - mutex_lock(&oh->_mutex); + unsigned long flags; + + spin_lock_irqsave(&oh->_lock, flags); _enable_clocks(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1706,9 +3522,11 @@ int omap_hwmod_enable_clocks(struct omap_hwmod *oh) */ int omap_hwmod_disable_clocks(struct omap_hwmod *oh) { - mutex_lock(&oh->_mutex); + unsigned long flags; + + spin_lock_irqsave(&oh->_lock, flags); _disable_clocks(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1729,8 +3547,8 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) BUG_ON(!oh); if (!oh->class->sysc || !oh->class->sysc->sysc_flags) { - WARN(1, "omap_device: %s: OCP barrier impossible due to " - "device configuration\n", oh->name); + WARN(1, "omap_device: %s: OCP barrier impossible due to device configuration\n", + oh->name); return; } @@ -1752,21 +3570,26 @@ void omap_hwmod_ocp_barrier(struct omap_hwmod *oh) int omap_hwmod_reset(struct omap_hwmod *oh) { int r; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); r = _reset(oh); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return r; } +/* + * IP block data retrieval functions + */ + /** * omap_hwmod_count_resources - count number of struct resources needed by hwmod * @oh: struct omap_hwmod * - * @res: pointer to the first element of an array of struct resource to fill + * @flags: Type of resources to include when counting (IRQ/DMA/MEM) * * Count the number of struct resource array elements necessary to * contain omap_hwmod @oh resources. Intended to be called by code @@ -1779,14 +3602,26 @@ int omap_hwmod_reset(struct omap_hwmod *oh) * resource IDs. * */ -int omap_hwmod_count_resources(struct omap_hwmod *oh) +int omap_hwmod_count_resources(struct omap_hwmod *oh, unsigned long flags) { - int ret, i; + int ret = 0; + + if (flags & IORESOURCE_IRQ) + ret += _count_mpu_irqs(oh); - ret = oh->mpu_irqs_cnt + oh->sdma_reqs_cnt; + if (flags & IORESOURCE_DMA) + ret += _count_sdma_reqs(oh); - for (i = 0; i < oh->slaves_cnt; i++) - ret += oh->slaves[i]->addr_cnt; + if (flags & IORESOURCE_MEM) { + int i = 0; + struct omap_hwmod_ocp_if *os; + struct list_head *p = oh->slave_ports.next; + + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + ret += _count_ocp_if_addr_spaces(os); + } + } return ret; } @@ -1803,12 +3638,15 @@ int omap_hwmod_count_resources(struct omap_hwmod *oh) */ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) { - int i, j; + struct omap_hwmod_ocp_if *os; + struct list_head *p; + int i, j, mpu_irqs_cnt, sdma_reqs_cnt, addr_cnt; int r = 0; /* For each IRQ, DMA, memory area, fill in array.*/ - for (i = 0; i < oh->mpu_irqs_cnt; i++) { + mpu_irqs_cnt = _count_mpu_irqs(oh); + for (i = 0; i < mpu_irqs_cnt; i++) { (res + r)->name = (oh->mpu_irqs + i)->name; (res + r)->start = (oh->mpu_irqs + i)->irq; (res + r)->end = (oh->mpu_irqs + i)->irq; @@ -1816,7 +3654,8 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) r++; } - for (i = 0; i < oh->sdma_reqs_cnt; i++) { + sdma_reqs_cnt = _count_sdma_reqs(oh); + for (i = 0; i < sdma_reqs_cnt; i++) { (res + r)->name = (oh->sdma_reqs + i)->name; (res + r)->start = (oh->sdma_reqs + i)->dma_req; (res + r)->end = (oh->sdma_reqs + i)->dma_req; @@ -1824,12 +3663,15 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) r++; } - for (i = 0; i < oh->slaves_cnt; i++) { - struct omap_hwmod_ocp_if *os; + p = oh->slave_ports.next; - os = oh->slaves[i]; + i = 0; + while (i < oh->slaves_cnt) { + os = _fetch_next_ocp_if(&p, &i); + addr_cnt = _count_ocp_if_addr_spaces(os); - for (j = 0; j < os->addr_cnt; j++) { + for (j = 0; j < addr_cnt; j++) { + (res + r)->name = (os->addr + j)->name; (res + r)->start = (os->addr + j)->pa_start; (res + r)->end = (os->addr + j)->pa_end; (res + r)->flags = IORESOURCE_MEM; @@ -1841,6 +3683,96 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) } /** + * omap_hwmod_fill_dma_resources - fill struct resource array with dma data + * @oh: struct omap_hwmod * + * @res: pointer to the array of struct resource to fill + * + * Fill the struct resource array @res with dma resource data from the + * omap_hwmod @oh. Intended to be called by code that registers + * omap_devices. See also omap_hwmod_count_resources(). Returns the + * number of array elements filled. + */ +int omap_hwmod_fill_dma_resources(struct omap_hwmod *oh, struct resource *res) +{ + int i, sdma_reqs_cnt; + int r = 0; + + sdma_reqs_cnt = _count_sdma_reqs(oh); + for (i = 0; i < sdma_reqs_cnt; i++) { + (res + r)->name = (oh->sdma_reqs + i)->name; + (res + r)->start = (oh->sdma_reqs + i)->dma_req; + (res + r)->end = (oh->sdma_reqs + i)->dma_req; + (res + r)->flags = IORESOURCE_DMA; + r++; + } + + return r; +} + +/** + * omap_hwmod_get_resource_byname - fetch IP block integration data by name + * @oh: struct omap_hwmod * to operate on + * @type: one of the IORESOURCE_* constants from include/linux/ioport.h + * @name: pointer to the name of the data to fetch (optional) + * @rsrc: pointer to a struct resource, allocated by the caller + * + * Retrieve MPU IRQ, SDMA request line, or address space start/end + * data for the IP block pointed to by @oh. The data will be filled + * into a struct resource record pointed to by @rsrc. The struct + * resource must be allocated by the caller. When @name is non-null, + * the data associated with the matching entry in the IRQ/SDMA/address + * space hwmod data arrays will be returned. If @name is null, the + * first array entry will be returned. Data order is not meaningful + * in hwmod data, so callers are strongly encouraged to use a non-null + * @name whenever possible to avoid unpredictable effects if hwmod + * data is later added that causes data ordering to change. This + * function is only intended for use by OMAP core code. Device + * drivers should not call this function - the appropriate bus-related + * data accessor functions should be used instead. Returns 0 upon + * success or a negative error code upon error. + */ +int omap_hwmod_get_resource_byname(struct omap_hwmod *oh, unsigned int type, + const char *name, struct resource *rsrc) +{ + int r; + unsigned int irq, dma; + u32 pa_start, pa_end; + + if (!oh || !rsrc) + return -EINVAL; + + if (type == IORESOURCE_IRQ) { + r = _get_mpu_irq_by_name(oh, name, &irq); + if (r) + return r; + + rsrc->start = irq; + rsrc->end = irq; + } else if (type == IORESOURCE_DMA) { + r = _get_sdma_req_by_name(oh, name, &dma); + if (r) + return r; + + rsrc->start = dma; + rsrc->end = dma; + } else if (type == IORESOURCE_MEM) { + r = _get_addr_space_by_name(oh, name, &pa_start, &pa_end); + if (r) + return r; + + rsrc->start = pa_start; + rsrc->end = pa_end; + } else { + return -EINVAL; + } + + rsrc->flags = type; + rsrc->name = name; + + return 0; +} + +/** * omap_hwmod_get_pwrdm - return pointer to this module's main powerdomain * @oh: struct omap_hwmod * * @@ -1854,23 +3786,31 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res) struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) { struct clk *c; + struct omap_hwmod_ocp_if *oi; + struct clockdomain *clkdm; + struct clk_hw_omap *clk; if (!oh) return NULL; + if (oh->clkdm) + return oh->clkdm->pwrdm.ptr; + if (oh->_clk) { c = oh->_clk; } else { - if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + oi = _find_mpu_rt_port(oh); + if (!oi) return NULL; - c = oh->slaves[oh->_mpu_port_index]->_clk; + c = oi->_clk; } - if (!c->clkdm) + clk = to_clk_hw_omap(__clk_get_hw(c)); + clkdm = clk->clkdm; + if (!clkdm) return NULL; - return c->clkdm->pwrdm.ptr; - + return clkdm->pwrdm.ptr; } /** @@ -1946,22 +3886,30 @@ int omap_hwmod_del_initiator_dep(struct omap_hwmod *oh, * @oh: struct omap_hwmod * * * Sets the module OCP socket ENAWAKEUP bit to allow the module to - * send wakeups to the PRCM. Eventually this should sets PRCM wakeup - * registers to cause the PRCM to receive wakeup events from the - * module. Does not set any wakeup routing registers beyond this - * point - if the module is to wake up any other module or subsystem, - * that must be set separately. Called by omap_device code. Returns - * -EINVAL on error or 0 upon success. + * send wakeups to the PRCM, and enable I/O ring wakeup events for + * this IP block if it has dynamic mux entries. Eventually this + * should set PRCM wakeup registers to cause the PRCM to receive + * wakeup events from the module. Does not set any wakeup routing + * registers beyond this point - if the module is to wake up any other + * module or subsystem, that must be set separately. Called by + * omap_device code. Returns -EINVAL on error or 0 upon success. */ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) { - if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) - return -EINVAL; + unsigned long flags; + u32 v; + + spin_lock_irqsave(&oh->_lock, flags); - mutex_lock(&oh->_mutex); - _enable_wakeup(oh); - mutex_unlock(&oh->_mutex); + if (oh->class->sysc && + (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) { + v = oh->_sysc_cache; + _enable_wakeup(oh, &v); + _write_sysconfig(v, oh); + } + + _set_idle_ioring_wakeup(oh, true); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -1971,22 +3919,30 @@ int omap_hwmod_enable_wakeup(struct omap_hwmod *oh) * @oh: struct omap_hwmod * * * Clears the module OCP socket ENAWAKEUP bit to prevent the module - * from sending wakeups to the PRCM. Eventually this should clear - * PRCM wakeup registers to cause the PRCM to ignore wakeup events - * from the module. Does not set any wakeup routing registers beyond - * this point - if the module is to wake up any other module or - * subsystem, that must be set separately. Called by omap_device - * code. Returns -EINVAL on error or 0 upon success. + * from sending wakeups to the PRCM, and disable I/O ring wakeup + * events for this IP block if it has dynamic mux entries. Eventually + * this should clear PRCM wakeup registers to cause the PRCM to ignore + * wakeup events from the module. Does not set any wakeup routing + * registers beyond this point - if the module is to wake up any other + * module or subsystem, that must be set separately. Called by + * omap_device code. Returns -EINVAL on error or 0 upon success. */ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) { - if (!oh->class->sysc || - !(oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) - return -EINVAL; + unsigned long flags; + u32 v; + + spin_lock_irqsave(&oh->_lock, flags); - mutex_lock(&oh->_mutex); - _disable_wakeup(oh); - mutex_unlock(&oh->_mutex); + if (oh->class->sysc && + (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)) { + v = oh->_sysc_cache; + _disable_wakeup(oh, &v); + _write_sysconfig(v, oh); + } + + _set_idle_ioring_wakeup(oh, false); + spin_unlock_irqrestore(&oh->_lock, flags); return 0; } @@ -2006,13 +3962,14 @@ int omap_hwmod_disable_wakeup(struct omap_hwmod *oh) int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _assert_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2032,13 +3989,14 @@ int omap_hwmod_assert_hardreset(struct omap_hwmod *oh, const char *name) int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _deassert_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2057,13 +4015,14 @@ int omap_hwmod_deassert_hardreset(struct omap_hwmod *oh, const char *name) int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) { int ret; + unsigned long flags; if (!oh) return -EINVAL; - mutex_lock(&oh->_mutex); + spin_lock_irqsave(&oh->_lock, flags); ret = _read_hardreset(oh, name); - mutex_unlock(&oh->_mutex); + spin_unlock_irqrestore(&oh->_lock, flags); return ret; } @@ -2075,9 +4034,8 @@ int omap_hwmod_read_hardreset(struct omap_hwmod *oh, const char *name) * @fn: callback function pointer to call for each hwmod in class @classname * @user: arbitrary context data to pass to the callback function * - * For each omap_hwmod of class @classname, call @fn. Takes - * omap_hwmod_mutex to prevent the hwmod list from changing during the - * iteration. If the callback function returns something other than + * For each omap_hwmod of class @classname, call @fn. + * If the callback function returns something other than * zero, the iterator is terminated, and the callback function's return * value is passed back to the caller. Returns 0 upon success, -EINVAL * if @classname or @fn are NULL, or passes back the error code from @fn. @@ -2096,8 +4054,6 @@ int omap_hwmod_for_each_by_class(const char *classname, pr_debug("omap_hwmod: %s: looking for modules of class %s\n", __func__, classname); - mutex_lock(&omap_hwmod_mutex); - list_for_each_entry(temp_oh, &omap_hwmod_list, node) { if (!strcmp(temp_oh->class->name, classname)) { pr_debug("omap_hwmod: %s: %s: calling callback fn\n", @@ -2108,8 +4064,6 @@ int omap_hwmod_for_each_by_class(const char *classname, } } - mutex_unlock(&omap_hwmod_mutex); - if (ret) pr_debug("omap_hwmod: %s: iterator terminated early: %d\n", __func__, ret); @@ -2117,3 +4071,216 @@ int omap_hwmod_for_each_by_class(const char *classname, return ret; } +/** + * omap_hwmod_set_postsetup_state - set the post-_setup() state for this hwmod + * @oh: struct omap_hwmod * + * @state: state that _setup() should leave the hwmod in + * + * Sets the hwmod state that @oh will enter at the end of _setup() + * (called by omap_hwmod_setup_*()). See also the documentation + * for _setup_postsetup(), above. Returns 0 upon success or + * -EINVAL if there is a problem with the arguments or if the hwmod is + * in the wrong state. + */ +int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state) +{ + int ret; + unsigned long flags; + + if (!oh) + return -EINVAL; + + if (state != _HWMOD_STATE_DISABLED && + state != _HWMOD_STATE_ENABLED && + state != _HWMOD_STATE_IDLE) + return -EINVAL; + + spin_lock_irqsave(&oh->_lock, flags); + + if (oh->_state != _HWMOD_STATE_REGISTERED) { + ret = -EINVAL; + goto ohsps_unlock; + } + + oh->_postsetup_state = state; + ret = 0; + +ohsps_unlock: + spin_unlock_irqrestore(&oh->_lock, flags); + + return ret; +} + +/** + * omap_hwmod_get_context_loss_count - get lost context count + * @oh: struct omap_hwmod * + * + * Returns the context loss count of associated @oh + * upon success, or zero if no context loss data is available. + * + * On OMAP4, this queries the per-hwmod context loss register, + * assuming one exists. If not, or on OMAP2/3, this queries the + * enclosing powerdomain context loss count. + */ +int omap_hwmod_get_context_loss_count(struct omap_hwmod *oh) +{ + struct powerdomain *pwrdm; + int ret = 0; + + if (soc_ops.get_context_lost) + return soc_ops.get_context_lost(oh); + + pwrdm = omap_hwmod_get_pwrdm(oh); + if (pwrdm) + ret = pwrdm_get_context_loss_count(pwrdm); + + return ret; +} + +/** + * omap_hwmod_no_setup_reset - prevent a hwmod from being reset upon setup + * @oh: struct omap_hwmod * + * + * Prevent the hwmod @oh from being reset during the setup process. + * Intended for use by board-*.c files on boards with devices that + * cannot tolerate being reset. Must be called before the hwmod has + * been set up. Returns 0 upon success or negative error code upon + * failure. + */ +int omap_hwmod_no_setup_reset(struct omap_hwmod *oh) +{ + if (!oh) + return -EINVAL; + + if (oh->_state != _HWMOD_STATE_REGISTERED) { + pr_err("omap_hwmod: %s: cannot prevent setup reset; in wrong state\n", + oh->name); + return -EINVAL; + } + + oh->flags |= HWMOD_INIT_NO_RESET; + + return 0; +} + +/** + * omap_hwmod_pad_route_irq - route an I/O pad wakeup to a particular MPU IRQ + * @oh: struct omap_hwmod * containing hwmod mux entries + * @pad_idx: array index in oh->mux of the hwmod mux entry to route wakeup + * @irq_idx: the hwmod mpu_irqs array index of the IRQ to trigger on wakeup + * + * When an I/O pad wakeup arrives for the dynamic or wakeup hwmod mux + * entry number @pad_idx for the hwmod @oh, trigger the interrupt + * service routine for the hwmod's mpu_irqs array index @irq_idx. If + * this function is not called for a given pad_idx, then the ISR + * associated with @oh's first MPU IRQ will be triggered when an I/O + * pad wakeup occurs on that pad. Note that @pad_idx is the index of + * the _dynamic or wakeup_ entry: if there are other entries not + * marked with OMAP_DEVICE_PAD_WAKEUP or OMAP_DEVICE_PAD_REMUX, these + * entries are NOT COUNTED in the dynamic pad index. This function + * must be called separately for each pad that requires its interrupt + * to be re-routed this way. Returns -EINVAL if there is an argument + * problem or if @oh does not have hwmod mux entries or MPU IRQs; + * returns -ENOMEM if memory cannot be allocated; or 0 upon success. + * + * XXX This function interface is fragile. Rather than using array + * indexes, which are subject to unpredictable change, it should be + * using hwmod IRQ names, and some other stable key for the hwmod mux + * pad records. + */ +int omap_hwmod_pad_route_irq(struct omap_hwmod *oh, int pad_idx, int irq_idx) +{ + int nr_irqs; + + might_sleep(); + + if (!oh || !oh->mux || !oh->mpu_irqs || pad_idx < 0 || + pad_idx >= oh->mux->nr_pads_dynamic) + return -EINVAL; + + /* Check the number of available mpu_irqs */ + for (nr_irqs = 0; oh->mpu_irqs[nr_irqs].irq >= 0; nr_irqs++) + ; + + if (irq_idx >= nr_irqs) + return -EINVAL; + + if (!oh->mux->irqs) { + /* XXX What frees this? */ + oh->mux->irqs = kzalloc(sizeof(int) * oh->mux->nr_pads_dynamic, + GFP_KERNEL); + if (!oh->mux->irqs) + return -ENOMEM; + } + oh->mux->irqs[pad_idx] = irq_idx; + + return 0; +} + +/** + * omap_hwmod_init - initialize the hwmod code + * + * Sets up some function pointers needed by the hwmod code to operate on the + * currently-booted SoC. Intended to be called once during kernel init + * before any hwmods are registered. No return value. + */ +void __init omap_hwmod_init(void) +{ + if (cpu_is_omap24xx()) { + soc_ops.wait_target_ready = _omap2xxx_wait_target_ready; + soc_ops.assert_hardreset = _omap2_assert_hardreset; + soc_ops.deassert_hardreset = _omap2_deassert_hardreset; + soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted; + } else if (cpu_is_omap34xx()) { + soc_ops.wait_target_ready = _omap3xxx_wait_target_ready; + soc_ops.assert_hardreset = _omap2_assert_hardreset; + soc_ops.deassert_hardreset = _omap2_deassert_hardreset; + soc_ops.is_hardreset_asserted = _omap2_is_hardreset_asserted; + soc_ops.init_clkdm = _init_clkdm; + } else if (cpu_is_omap44xx() || soc_is_omap54xx() || soc_is_dra7xx()) { + soc_ops.enable_module = _omap4_enable_module; + soc_ops.disable_module = _omap4_disable_module; + soc_ops.wait_target_ready = _omap4_wait_target_ready; + soc_ops.assert_hardreset = _omap4_assert_hardreset; + soc_ops.deassert_hardreset = _omap4_deassert_hardreset; + soc_ops.is_hardreset_asserted = _omap4_is_hardreset_asserted; + soc_ops.init_clkdm = _init_clkdm; + soc_ops.update_context_lost = _omap4_update_context_lost; + soc_ops.get_context_lost = _omap4_get_context_lost; + } else if (soc_is_am43xx()) { + soc_ops.enable_module = _omap4_enable_module; + soc_ops.disable_module = _omap4_disable_module; + soc_ops.wait_target_ready = _omap4_wait_target_ready; + soc_ops.assert_hardreset = _am33xx_assert_hardreset; + soc_ops.deassert_hardreset = _am33xx_deassert_hardreset; + soc_ops.is_hardreset_asserted = _am33xx_is_hardreset_asserted; + soc_ops.init_clkdm = _init_clkdm; + } else if (soc_is_am33xx()) { + soc_ops.enable_module = _am33xx_enable_module; + soc_ops.disable_module = _am33xx_disable_module; + soc_ops.wait_target_ready = _am33xx_wait_target_ready; + soc_ops.assert_hardreset = _am33xx_assert_hardreset; + soc_ops.deassert_hardreset = _am33xx_deassert_hardreset; + soc_ops.is_hardreset_asserted = _am33xx_is_hardreset_asserted; + soc_ops.init_clkdm = _init_clkdm; + } else { + WARN(1, "omap_hwmod: unknown SoC type\n"); + } + + inited = true; +} + +/** + * omap_hwmod_get_main_clk - get pointer to main clock name + * @oh: struct omap_hwmod * + * + * Returns the main clock name assocated with @oh upon success, + * or NULL if @oh is NULL. + */ +const char *omap_hwmod_get_main_clk(struct omap_hwmod *oh) +{ + if (!oh) + return NULL; + + return oh->main_clk; +} |