diff options
Diffstat (limited to 'drivers/ssb/main.c')
| -rw-r--r-- | drivers/ssb/main.c | 274 |
1 files changed, 198 insertions, 76 deletions
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c index c68b3dc19e1..2fead382084 100644 --- a/drivers/ssb/main.c +++ b/drivers/ssb/main.c @@ -3,7 +3,7 @@ * Subsystem core * * Copyright 2005, Broadcom Corporation - * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de> + * Copyright 2006, 2007, Michael Buesch <m@bues.ch> * * Licensed under the GNU/GPL. See COPYING for details. */ @@ -12,6 +12,8 @@ #include <linux/delay.h> #include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include <linux/ssb/ssb.h> #include <linux/ssb/ssb_regs.h> #include <linux/ssb/ssb_driver_gige.h> @@ -139,19 +141,6 @@ static void ssb_device_put(struct ssb_device *dev) put_device(dev->dev); } -static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv) -{ - if (drv) - get_driver(&drv->drv); - return drv; -} - -static inline void ssb_driver_put(struct ssb_driver *drv) -{ - if (drv) - put_driver(&drv->drv); -} - static int ssb_device_resume(struct device *dev) { struct ssb_device *ssb_dev = dev_to_ssb_dev(dev); @@ -249,11 +238,9 @@ int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx) ssb_device_put(sdev); continue; } - sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver)); - if (!sdrv || SSB_WARN_ON(!sdrv->remove)) { - ssb_device_put(sdev); + sdrv = drv_to_ssb_drv(sdev->dev->driver); + if (SSB_WARN_ON(!sdrv->remove)) continue; - } sdrv->remove(sdev); ctx->device_frozen[i] = 1; } @@ -288,11 +275,10 @@ int ssb_devices_thaw(struct ssb_freeze_context *ctx) err = sdrv->probe(sdev, &sdev->id); if (err) { - ssb_printk(KERN_ERR PFX "Failed to thaw device %s\n", - dev_name(sdev->dev)); + ssb_err("Failed to thaw device %s\n", + dev_name(sdev->dev)); result = err; } - ssb_driver_put(sdrv); ssb_device_put(sdev); } @@ -383,6 +369,38 @@ static int ssb_device_uevent(struct device *dev, struct kobj_uevent_env *env) ssb_dev->id.revision); } +#define ssb_config_attr(attrib, field, format_string) \ +static ssize_t \ +attrib##_show(struct device *dev, struct device_attribute *attr, char *buf) \ +{ \ + return sprintf(buf, format_string, dev_to_ssb_dev(dev)->field); \ +} \ +static DEVICE_ATTR_RO(attrib); + +ssb_config_attr(core_num, core_index, "%u\n") +ssb_config_attr(coreid, id.coreid, "0x%04x\n") +ssb_config_attr(vendor, id.vendor, "0x%04x\n") +ssb_config_attr(revision, id.revision, "%u\n") +ssb_config_attr(irq, irq, "%u\n") +static ssize_t +name_show(struct device *dev, struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%s\n", + ssb_core_name(dev_to_ssb_dev(dev)->id.coreid)); +} +static DEVICE_ATTR_RO(name); + +static struct attribute *ssb_device_attrs[] = { + &dev_attr_name.attr, + &dev_attr_core_num.attr, + &dev_attr_coreid.attr, + &dev_attr_vendor.attr, + &dev_attr_revision.attr, + &dev_attr_irq.attr, + NULL, +}; +ATTRIBUTE_GROUPS(ssb_device); + static struct bus_type ssb_bustype = { .name = "ssb", .match = ssb_bus_match, @@ -392,6 +410,7 @@ static struct bus_type ssb_bustype = { .suspend = ssb_device_suspend, .resume = ssb_device_resume, .uevent = ssb_device_uevent, + .dev_groups = ssb_device_groups, }; static void ssb_buses_lock(void) @@ -418,10 +437,23 @@ static void ssb_devices_unregister(struct ssb_bus *bus) if (sdev->dev) device_unregister(sdev->dev); } + +#ifdef CONFIG_SSB_EMBEDDED + if (bus->bustype == SSB_BUSTYPE_SSB) + platform_device_unregister(bus->watchdog); +#endif } void ssb_bus_unregister(struct ssb_bus *bus) { + int err; + + err = ssb_gpio_unregister(bus); + if (err == -EBUSY) + ssb_dbg("Some GPIOs are still in use\n"); + else if (err) + ssb_dbg("Can not unregister GPIO driver: %i\n", err); + ssb_buses_lock(); ssb_devices_unregister(bus); list_del(&bus->list); @@ -467,8 +499,7 @@ static int ssb_devices_register(struct ssb_bus *bus) devwrap = kzalloc(sizeof(*devwrap), GFP_KERNEL); if (!devwrap) { - ssb_printk(KERN_ERR PFX - "Could not allocate device\n"); + ssb_err("Could not allocate device\n"); err = -ENOMEM; goto error; } @@ -507,9 +538,7 @@ static int ssb_devices_register(struct ssb_bus *bus) sdev->dev = dev; err = device_register(dev); if (err) { - ssb_printk(KERN_ERR PFX - "Could not register %s\n", - dev_name(dev)); + ssb_err("Could not register %s\n", dev_name(dev)); /* Set dev to NULL to not unregister * dev on error unwinding. */ sdev->dev = NULL; @@ -519,6 +548,22 @@ static int ssb_devices_register(struct ssb_bus *bus) dev_idx++; } +#ifdef CONFIG_SSB_DRIVER_MIPS + if (bus->mipscore.pflash.present) { + err = platform_device_register(&ssb_pflash_dev); + if (err) + pr_err("Error registering parallel flash\n"); + } +#endif + +#ifdef CONFIG_SSB_SFLASH + if (bus->mipscore.sflash.present) { + err = platform_device_register(&ssb_sflash_dev); + if (err) + pr_err("Error registering serial flash\n"); + } +#endif + return 0; error: /* Unwind the already registered devices. */ @@ -546,6 +591,15 @@ static int ssb_attach_queued_buses(void) if (err) goto error; ssb_pcicore_init(&bus->pcicore); + if (bus->bustype == SSB_BUSTYPE_SSB) + ssb_watchdog_register(bus); + + err = ssb_gpio_init(bus); + if (err == -ENOTSUPP) + ssb_dbg("GPIO driver not activated\n"); + else if (err) + ssb_dbg("Error registering GPIO driver: %i\n", err); + ssb_bus_may_powerdown(bus); err = ssb_devices_register(bus); @@ -781,6 +835,7 @@ static int ssb_bus_register(struct ssb_bus *bus, if (err) goto err_pcmcia_exit; ssb_chipcommon_init(&bus->chipco); + ssb_extif_init(&bus->extif); ssb_mipscore_init(&bus->mipscore); err = ssb_fetch_invariants(bus, get_invariants); if (err) { @@ -821,8 +876,7 @@ err_disable_xtal: } #ifdef CONFIG_SSB_PCIHOST -int ssb_bus_pcibus_register(struct ssb_bus *bus, - struct pci_dev *host_pci) +int ssb_bus_pcibus_register(struct ssb_bus *bus, struct pci_dev *host_pci) { int err; @@ -832,11 +886,11 @@ int ssb_bus_pcibus_register(struct ssb_bus *bus, err = ssb_bus_register(bus, ssb_pci_get_invariants, 0); if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on " - "PCI device %s\n", dev_name(&host_pci->dev)); + ssb_info("Sonics Silicon Backplane found on PCI device %s\n", + dev_name(&host_pci->dev)); } else { - ssb_printk(KERN_ERR PFX "Failed to register PCI version" - " of SSB with error %d\n", err); + ssb_err("Failed to register PCI version of SSB with error %d\n", + err); } return err; @@ -857,8 +911,8 @@ int ssb_bus_pcmciabus_register(struct ssb_bus *bus, err = ssb_bus_register(bus, ssb_pcmcia_get_invariants, baseaddr); if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on " - "PCMCIA device %s\n", pcmcia_dev->devname); + ssb_info("Sonics Silicon Backplane found on PCMCIA device %s\n", + pcmcia_dev->devname); } return err; @@ -879,8 +933,8 @@ int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func, err = ssb_bus_register(bus, ssb_sdio_get_invariants, ~0); if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found on " - "SDIO device %s\n", sdio_func_id(func)); + ssb_info("Sonics Silicon Backplane found on SDIO device %s\n", + sdio_func_id(func)); } return err; @@ -888,8 +942,7 @@ int ssb_bus_sdiobus_register(struct ssb_bus *bus, struct sdio_func *func, EXPORT_SYMBOL(ssb_bus_sdiobus_register); #endif /* CONFIG_SSB_PCMCIAHOST */ -int ssb_bus_ssbbus_register(struct ssb_bus *bus, - unsigned long baseaddr, +int ssb_bus_ssbbus_register(struct ssb_bus *bus, unsigned long baseaddr, ssb_invariants_func_t get_invariants) { int err; @@ -899,8 +952,8 @@ int ssb_bus_ssbbus_register(struct ssb_bus *bus, err = ssb_bus_register(bus, get_invariants, baseaddr); if (!err) { - ssb_printk(KERN_INFO PFX "Sonics Silicon Backplane found at " - "address 0x%08lX\n", baseaddr); + ssb_info("Sonics Silicon Backplane found at address 0x%08lX\n", + baseaddr); } return err; @@ -971,8 +1024,8 @@ u32 ssb_calc_clock_rate(u32 plltype, u32 n, u32 m) switch (plltype) { case SSB_PLLTYPE_6: /* 100/200 or 120/240 only */ if (m & SSB_CHIPCO_CLK_T6_MMASK) - return SSB_CHIPCO_CLK_T6_M0; - return SSB_CHIPCO_CLK_T6_M1; + return SSB_CHIPCO_CLK_T6_M1; + return SSB_CHIPCO_CLK_T6_M0; case SSB_PLLTYPE_1: /* 48Mhz base, 3 dividers */ case SSB_PLLTYPE_3: /* 25Mhz, 2 dividers */ case SSB_PLLTYPE_4: /* 48Mhz, 4 dividers */ @@ -1062,6 +1115,9 @@ u32 ssb_clockspeed(struct ssb_bus *bus) u32 plltype; u32 clkctl_n, clkctl_m; + if (bus->chipco.capabilities & SSB_CHIPCO_CAP_PMU) + return ssb_pmu_get_controlclock(&bus->chipco); + if (ssb_extif_available(&bus->extif)) ssb_extif_get_clockcontrol(&bus->extif, &plltype, &clkctl_n, &clkctl_m); @@ -1087,23 +1143,21 @@ static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev) { u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV; - /* The REJECT bit changed position in TMSLOW between - * Backplane revisions. */ + /* The REJECT bit seems to be different for Backplane rev 2.3 */ switch (rev) { case SSB_IDLOW_SSBREV_22: - return SSB_TMSLOW_REJECT_22; + case SSB_IDLOW_SSBREV_24: + case SSB_IDLOW_SSBREV_26: + return SSB_TMSLOW_REJECT; case SSB_IDLOW_SSBREV_23: return SSB_TMSLOW_REJECT_23; - case SSB_IDLOW_SSBREV_24: /* TODO - find the proper REJECT bits */ - case SSB_IDLOW_SSBREV_25: /* same here */ - case SSB_IDLOW_SSBREV_26: /* same here */ + case SSB_IDLOW_SSBREV_25: /* TODO - find the proper REJECT bit */ case SSB_IDLOW_SSBREV_27: /* same here */ - return SSB_TMSLOW_REJECT_23; /* this is a guess */ + return SSB_TMSLOW_REJECT; /* this is a guess */ default: - printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev); - WARN_ON(1); + WARN(1, KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev); } - return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23); + return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23); } int ssb_device_is_enabled(struct ssb_device *dev) @@ -1162,10 +1216,10 @@ void ssb_device_enable(struct ssb_device *dev, u32 core_specific_flags) } EXPORT_SYMBOL(ssb_device_enable); -/* Wait for a bit in a register to get set or unset. +/* Wait for bitmask in a register to get set or cleared. * timeout is in units of ten-microseconds */ -static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask, - int timeout, int set) +static int ssb_wait_bits(struct ssb_device *dev, u16 reg, u32 bitmask, + int timeout, int set) { int i; u32 val; @@ -1173,7 +1227,7 @@ static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask, for (i = 0; i < timeout; i++) { val = ssb_read32(dev, reg); if (set) { - if (val & bitmask) + if ((val & bitmask) == bitmask) return 0; } else { if (!(val & bitmask)) @@ -1190,20 +1244,38 @@ static int ssb_wait_bit(struct ssb_device *dev, u16 reg, u32 bitmask, void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) { - u32 reject; + u32 reject, val; if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_RESET) return; reject = ssb_tmslow_reject_bitmask(dev); - ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); - ssb_wait_bit(dev, SSB_TMSLOW, reject, 1000, 1); - ssb_wait_bit(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); - ssb_write32(dev, SSB_TMSLOW, - SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | - reject | SSB_TMSLOW_RESET | - core_specific_flags); - ssb_flush_tmslow(dev); + + if (ssb_read32(dev, SSB_TMSLOW) & SSB_TMSLOW_CLOCK) { + ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_CLOCK); + ssb_wait_bits(dev, SSB_TMSLOW, reject, 1000, 1); + ssb_wait_bits(dev, SSB_TMSHIGH, SSB_TMSHIGH_BUSY, 1000, 0); + + if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { + val = ssb_read32(dev, SSB_IMSTATE); + val |= SSB_IMSTATE_REJECT; + ssb_write32(dev, SSB_IMSTATE, val); + ssb_wait_bits(dev, SSB_IMSTATE, SSB_IMSTATE_BUSY, 1000, + 0); + } + + ssb_write32(dev, SSB_TMSLOW, + SSB_TMSLOW_FGC | SSB_TMSLOW_CLOCK | + reject | SSB_TMSLOW_RESET | + core_specific_flags); + ssb_flush_tmslow(dev); + + if (ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_INITIATOR) { + val = ssb_read32(dev, SSB_IMSTATE); + val &= ~SSB_IMSTATE_REJECT; + ssb_write32(dev, SSB_IMSTATE, val); + } + } ssb_write32(dev, SSB_TMSLOW, reject | SSB_TMSLOW_RESET | @@ -1212,13 +1284,34 @@ void ssb_device_disable(struct ssb_device *dev, u32 core_specific_flags) } EXPORT_SYMBOL(ssb_device_disable); +/* Some chipsets need routing known for PCIe and 64-bit DMA */ +static bool ssb_dma_translation_special_bit(struct ssb_device *dev) +{ + u16 chip_id = dev->bus->chip_id; + + if (dev->id.coreid == SSB_DEV_80211) { + return (chip_id == 0x4322 || chip_id == 43221 || + chip_id == 43231 || chip_id == 43222); + } + + return 0; +} + u32 ssb_dma_translation(struct ssb_device *dev) { switch (dev->bus->bustype) { case SSB_BUSTYPE_SSB: return 0; case SSB_BUSTYPE_PCI: - return SSB_PCI_DMA; + if (pci_is_pcie(dev->bus->host_pci) && + ssb_read32(dev, SSB_TMSHIGH) & SSB_TMSHIGH_DMA64) { + return SSB_PCIE_DMA_H32; + } else { + if (ssb_dma_translation_special_bit(dev)) + return SSB_PCIE_DMA_H32; + else + return SSB_PCI_DMA; + } default: __ssb_dma_not_implemented(dev); } @@ -1254,34 +1347,65 @@ out: #endif return err; error: - ssb_printk(KERN_ERR PFX "Bus powerdown failed\n"); + ssb_err("Bus powerdown failed\n"); goto out; } EXPORT_SYMBOL(ssb_bus_may_powerdown); int ssb_bus_powerup(struct ssb_bus *bus, bool dynamic_pctl) { - struct ssb_chipcommon *cc; int err; enum ssb_clkmode mode; err = ssb_pci_xtal(bus, SSB_GPIO_XTAL | SSB_GPIO_PLL, 1); if (err) goto error; - cc = &bus->chipco; - mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST; - ssb_chipco_set_clockmode(cc, mode); #ifdef CONFIG_SSB_DEBUG bus->powered_up = 1; #endif + + mode = dynamic_pctl ? SSB_CLKMODE_DYNAMIC : SSB_CLKMODE_FAST; + ssb_chipco_set_clockmode(&bus->chipco, mode); + return 0; error: - ssb_printk(KERN_ERR PFX "Bus powerup failed\n"); + ssb_err("Bus powerup failed\n"); return err; } EXPORT_SYMBOL(ssb_bus_powerup); +static void ssb_broadcast_value(struct ssb_device *dev, + u32 address, u32 data) +{ +#ifdef CONFIG_SSB_DRIVER_PCICORE + /* This is used for both, PCI and ChipCommon core, so be careful. */ + BUILD_BUG_ON(SSB_PCICORE_BCAST_ADDR != SSB_CHIPCO_BCAST_ADDR); + BUILD_BUG_ON(SSB_PCICORE_BCAST_DATA != SSB_CHIPCO_BCAST_DATA); +#endif + + ssb_write32(dev, SSB_CHIPCO_BCAST_ADDR, address); + ssb_read32(dev, SSB_CHIPCO_BCAST_ADDR); /* flush */ + ssb_write32(dev, SSB_CHIPCO_BCAST_DATA, data); + ssb_read32(dev, SSB_CHIPCO_BCAST_DATA); /* flush */ +} + +void ssb_commit_settings(struct ssb_bus *bus) +{ + struct ssb_device *dev; + +#ifdef CONFIG_SSB_DRIVER_PCICORE + dev = bus->chipco.dev ? bus->chipco.dev : bus->pcicore.dev; +#else + dev = bus->chipco.dev; +#endif + if (WARN_ON(!dev)) + return; + /* This forces an update of the cached registers. */ + ssb_broadcast_value(dev, 0xFD8, 0); +} +EXPORT_SYMBOL(ssb_commit_settings); + u32 ssb_admatch_base(u32 adm) { u32 base = 0; @@ -1354,15 +1478,13 @@ static int __init ssb_modinit(void) err = b43_pci_ssb_bridge_init(); if (err) { - ssb_printk(KERN_ERR "Broadcom 43xx PCI-SSB-bridge " - "initialization failed\n"); + ssb_err("Broadcom 43xx PCI-SSB-bridge initialization failed\n"); /* don't fail SSB init because of this */ err = 0; } err = ssb_gige_init(); if (err) { - ssb_printk(KERN_ERR "SSB Broadcom Gigabit Ethernet " - "driver initialization failed\n"); + ssb_err("SSB Broadcom Gigabit Ethernet driver initialization failed\n"); /* don't fail SSB init because of this */ err = 0; } |