diff options
Diffstat (limited to 'arch/arm/mach-imx/mach-imx6q.c')
| -rw-r--r-- | arch/arm/mach-imx/mach-imx6q.c | 415 |
1 files changed, 343 insertions, 72 deletions
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index c2572810691..e60456d85c9 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -1,5 +1,5 @@ /* - * Copyright 2011 Freescale Semiconductor, Inc. + * Copyright 2011-2013 Freescale Semiconductor, Inc. * Copyright 2011 Linaro Ltd. * * The code contained herein is licensed under the GNU General Public @@ -10,133 +10,404 @@ * http://www.gnu.org/copyleft/gpl.html */ +#include <linux/clk.h> +#include <linux/clkdev.h> +#include <linux/cpu.h> #include <linux/delay.h> +#include <linux/export.h> #include <linux/init.h> #include <linux/io.h> #include <linux/irq.h> -#include <linux/irqdomain.h> +#include <linux/irqchip.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> +#include <linux/pm_opp.h> +#include <linux/pci.h> #include <linux/phy.h> +#include <linux/reboot.h> +#include <linux/regmap.h> #include <linux/micrel_phy.h> -#include <asm/hardware/cache-l2x0.h> -#include <asm/hardware/gic.h> +#include <linux/mfd/syscon.h> +#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> #include <asm/mach/arch.h> -#include <asm/mach/time.h> -#include <mach/common.h> -#include <mach/hardware.h> +#include <asm/mach/map.h> +#include <asm/system_misc.h> -void imx6q_restart(char mode, const char *cmd) +#include "common.h" +#include "cpuidle.h" +#include "hardware.h" + +/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */ +static int ksz9021rn_phy_fixup(struct phy_device *phydev) { - struct device_node *np; - void __iomem *wdog_base; + if (IS_BUILTIN(CONFIG_PHYLIB)) { + /* min rx data delay */ + phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL, + 0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW); + phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000); - np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt"); - wdog_base = of_iomap(np, 0); - if (!wdog_base) - goto soft; + /* max rx/tx clock delay, min rx/tx control delay */ + phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL, + 0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW); + phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0); + phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL, + MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW); + } - imx_src_prepare_restart(); + return 0; +} - /* enable wdog */ - writew_relaxed(1 << 2, wdog_base); - /* write twice to ensure the request will not get ignored */ - writew_relaxed(1 << 2, wdog_base); +static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val) +{ + phy_write(dev, 0x0d, device); + phy_write(dev, 0x0e, reg); + phy_write(dev, 0x0d, (1 << 14) | device); + phy_write(dev, 0x0e, val); +} - /* wait for reset to assert ... */ - mdelay(500); +static int ksz9031rn_phy_fixup(struct phy_device *dev) +{ + /* + * min rx data delay, max rx/tx clock delay, + * min rx/tx control delay + */ + mmd_write_reg(dev, 2, 4, 0); + mmd_write_reg(dev, 2, 5, 0); + mmd_write_reg(dev, 2, 8, 0x003ff); - pr_err("Watchdog reset failed to assert reset\n"); + return 0; +} - /* delay to allow the serial port to show the message */ - mdelay(50); +/* + * fixup for PLX PEX8909 bridge to configure GPIO1-7 as output High + * as they are used for slots1-7 PERST# + */ +static void ventana_pciesw_early_fixup(struct pci_dev *dev) +{ + u32 dw; + + if (!of_machine_is_compatible("gw,ventana")) + return; + + if (dev->devfn != 0) + return; -soft: - /* we'll take a jump through zero as a poor second */ - soft_restart(0); + pci_read_config_dword(dev, 0x62c, &dw); + dw |= 0xaaa8; // GPIO1-7 outputs + pci_write_config_dword(dev, 0x62c, dw); + + pci_read_config_dword(dev, 0x644, &dw); + dw |= 0xfe; // GPIO1-7 output high + pci_write_config_dword(dev, 0x644, dw); + + msleep(100); } +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8609, ventana_pciesw_early_fixup); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8606, ventana_pciesw_early_fixup); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_PLX, 0x8604, ventana_pciesw_early_fixup); -/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */ -static int ksz9021rn_phy_fixup(struct phy_device *phydev) +static int ar8031_phy_fixup(struct phy_device *dev) { - /* min rx data delay */ - phy_write(phydev, 0x0b, 0x8105); - phy_write(phydev, 0x0c, 0x0000); + u16 val; + + /* To enable AR8031 output a 125MHz clk from CLK_25M */ + phy_write(dev, 0xd, 0x7); + phy_write(dev, 0xe, 0x8016); + phy_write(dev, 0xd, 0x4007); - /* max rx/tx clock delay, min rx/tx control delay */ - phy_write(phydev, 0x0b, 0x8104); - phy_write(phydev, 0x0c, 0xf0f0); - phy_write(phydev, 0x0b, 0x104); + val = phy_read(dev, 0xe); + val &= 0xffe3; + val |= 0x18; + phy_write(dev, 0xe, val); + + /* introduce tx clock delay */ + phy_write(dev, 0x1d, 0x5); + val = phy_read(dev, 0x1e); + val |= 0x0100; + phy_write(dev, 0x1e, val); return 0; } -static void __init imx6q_init_machine(void) +#define PHY_ID_AR8031 0x004dd074 + +static int ar8035_phy_fixup(struct phy_device *dev) +{ + u16 val; + + /* Ar803x phy SmartEEE feature cause link status generates glitch, + * which cause ethernet link down/up issue, so disable SmartEEE + */ + phy_write(dev, 0xd, 0x3); + phy_write(dev, 0xe, 0x805d); + phy_write(dev, 0xd, 0x4003); + + val = phy_read(dev, 0xe); + phy_write(dev, 0xe, val & ~(1 << 8)); + + /* + * Enable 125MHz clock from CLK_25M on the AR8031. This + * is fed in to the IMX6 on the ENET_REF_CLK (V22) pad. + * Also, introduce a tx clock delay. + * + * This is the same as is the AR8031 fixup. + */ + ar8031_phy_fixup(dev); + + /*check phy power*/ + val = phy_read(dev, 0x0); + if (val & BMCR_PDOWN) + phy_write(dev, 0x0, val & ~BMCR_PDOWN); + + return 0; +} + +#define PHY_ID_AR8035 0x004dd072 + +static void __init imx6q_enet_phy_init(void) { - if (of_machine_is_compatible("fsl,imx6q-sabrelite")) + if (IS_BUILTIN(CONFIG_PHYLIB)) { phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK, - ksz9021rn_phy_fixup); + ksz9021rn_phy_fixup); + phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK, + ksz9031rn_phy_fixup); + phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff, + ar8031_phy_fixup); + phy_register_fixup_for_uid(PHY_ID_AR8035, 0xffffffef, + ar8035_phy_fixup); + } +} + +static void __init imx6q_1588_init(void) +{ + struct device_node *np; + struct clk *ptp_clk; + struct clk *enet_ref; + struct regmap *gpr; + u32 clksel; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-fec"); + if (!np) { + pr_warn("%s: failed to find fec node\n", __func__); + return; + } + + ptp_clk = of_clk_get(np, 2); + if (IS_ERR(ptp_clk)) { + pr_warn("%s: failed to get ptp clock\n", __func__); + goto put_node; + } + + enet_ref = clk_get_sys(NULL, "enet_ref"); + if (IS_ERR(enet_ref)) { + pr_warn("%s: failed to get enet clock\n", __func__); + goto put_ptp_clk; + } - of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); + /* + * If enet_ref from ANATOP/CCM is the PTP clock source, we need to + * set bit IOMUXC_GPR1[21]. Or the PTP clock must be from pad + * (external OSC), and we need to clear the bit. + */ + clksel = ptp_clk == enet_ref ? IMX6Q_GPR1_ENET_CLK_SEL_ANATOP : + IMX6Q_GPR1_ENET_CLK_SEL_PAD; + gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + if (!IS_ERR(gpr)) + regmap_update_bits(gpr, IOMUXC_GPR1, + IMX6Q_GPR1_ENET_CLK_SEL_MASK, + clksel); + else + pr_err("failed to find fsl,imx6q-iomux-gpr regmap\n"); - imx6q_pm_init(); + clk_put(enet_ref); +put_ptp_clk: + clk_put(ptp_clk); +put_node: + of_node_put(np); } -static void __init imx6q_map_io(void) +static void __init imx6q_axi_init(void) { - imx_lluart_map_io(); - imx_scu_map_io(); - imx6q_clock_map_io(); + struct regmap *gpr; + unsigned int mask; + + gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr"); + if (!IS_ERR(gpr)) { + /* + * Enable the cacheable attribute of VPU and IPU + * AXI transactions. + */ + mask = IMX6Q_GPR4_VPU_WR_CACHE_SEL | + IMX6Q_GPR4_VPU_RD_CACHE_SEL | + IMX6Q_GPR4_VPU_P_WR_CACHE_VAL | + IMX6Q_GPR4_VPU_P_RD_CACHE_VAL_MASK | + IMX6Q_GPR4_IPU_WR_CACHE_CTL | + IMX6Q_GPR4_IPU_RD_CACHE_CTL; + regmap_update_bits(gpr, IOMUXC_GPR4, mask, mask); + + /* Increase IPU read QoS priority */ + regmap_update_bits(gpr, IOMUXC_GPR6, + IMX6Q_GPR6_IPU1_ID00_RD_QOS_MASK | + IMX6Q_GPR6_IPU1_ID01_RD_QOS_MASK, + (0xf << 16) | (0x7 << 20)); + regmap_update_bits(gpr, IOMUXC_GPR7, + IMX6Q_GPR7_IPU2_ID00_RD_QOS_MASK | + IMX6Q_GPR7_IPU2_ID01_RD_QOS_MASK, + (0xf << 16) | (0x7 << 20)); + } else { + pr_warn("failed to find fsl,imx6q-iomuxc-gpr regmap\n"); + } } -static int __init imx6q_gpio_add_irq_domain(struct device_node *np, - struct device_node *interrupt_parent) +static void __init imx6q_init_machine(void) { - static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS; + struct device *parent; - gpio_irq_base -= 32; - irq_domain_add_simple(np, gpio_irq_base); + imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q", + imx_get_soc_revision()); - return 0; + mxc_arch_reset_init_dt(); + + parent = imx_soc_device_init(); + if (parent == NULL) + pr_warn("failed to initialize soc device\n"); + + imx6q_enet_phy_init(); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, parent); + + imx_anatop_init(); + cpu_is_imx6q() ? imx6q_pm_init() : imx6dl_pm_init(); + imx6q_1588_init(); + imx6q_axi_init(); } -static const struct of_device_id imx6q_irq_match[] __initconst = { - { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, }, - { .compatible = "fsl,imx6q-gpio", .data = imx6q_gpio_add_irq_domain, }, - { /* sentinel */ } -}; +#define OCOTP_CFG3 0x440 +#define OCOTP_CFG3_SPEED_SHIFT 16 +#define OCOTP_CFG3_SPEED_1P2GHZ 0x3 +#define OCOTP_CFG3_SPEED_996MHZ 0x2 +#define OCOTP_CFG3_SPEED_852MHZ 0x1 -static void __init imx6q_init_irq(void) +static void __init imx6q_opp_check_speed_grading(struct device *cpu_dev) { - l2x0_of_init(0, ~0UL); - imx_src_init(); - imx_gpc_init(); - of_irq_init(imx6q_irq_match); + struct device_node *np; + void __iomem *base; + u32 val; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp"); + if (!np) { + pr_warn("failed to find ocotp node\n"); + return; + } + + base = of_iomap(np, 0); + if (!base) { + pr_warn("failed to map ocotp\n"); + goto put_node; + } + + /* + * SPEED_GRADING[1:0] defines the max speed of ARM: + * 2b'11: 1200000000Hz; + * 2b'10: 996000000Hz; + * 2b'01: 852000000Hz; -- i.MX6Q Only, exclusive with 996MHz. + * 2b'00: 792000000Hz; + * We need to set the max speed of ARM according to fuse map. + */ + val = readl_relaxed(base + OCOTP_CFG3); + val >>= OCOTP_CFG3_SPEED_SHIFT; + val &= 0x3; + + if (val != OCOTP_CFG3_SPEED_1P2GHZ) + if (dev_pm_opp_disable(cpu_dev, 1200000000)) + pr_warn("failed to disable 1.2 GHz OPP\n"); + if (val < OCOTP_CFG3_SPEED_996MHZ) + if (dev_pm_opp_disable(cpu_dev, 996000000)) + pr_warn("failed to disable 996 MHz OPP\n"); + if (cpu_is_imx6q()) { + if (val != OCOTP_CFG3_SPEED_852MHZ) + if (dev_pm_opp_disable(cpu_dev, 852000000)) + pr_warn("failed to disable 852 MHz OPP\n"); + } + +put_node: + of_node_put(np); } -static void __init imx6q_timer_init(void) +static void __init imx6q_opp_init(void) { - mx6q_clocks_init(); + struct device_node *np; + struct device *cpu_dev = get_cpu_device(0); + + if (!cpu_dev) { + pr_warn("failed to get cpu0 device\n"); + return; + } + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_warn("failed to find cpu0 node\n"); + return; + } + + if (of_init_opp_table(cpu_dev)) { + pr_warn("failed to init OPP table\n"); + goto put_node; + } + + imx6q_opp_check_speed_grading(cpu_dev); + +put_node: + of_node_put(np); } -static struct sys_timer imx6q_timer = { - .init = imx6q_timer_init, +static struct platform_device imx6q_cpufreq_pdev = { + .name = "imx6q-cpufreq", }; -static const char *imx6q_dt_compat[] __initdata = { - "fsl,imx6q-arm2", - "fsl,imx6q-sabrelite", +static void __init imx6q_init_late(void) +{ + /* + * WAIT mode is broken on TO 1.0 and 1.1, so there is no point + * to run cpuidle on them. + */ + if (imx_get_soc_revision() > IMX_CHIP_REVISION_1_1) + imx6q_cpuidle_init(); + + if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) { + imx6q_opp_init(); + platform_device_register(&imx6q_cpufreq_pdev); + } +} + +static void __init imx6q_map_io(void) +{ + debug_ll_io_init(); + imx_scu_map_io(); +} + +static void __init imx6q_init_irq(void) +{ + imx_init_revision_from_anatop(); + imx_init_l2cache(); + imx_src_init(); + imx_gpc_init(); + irqchip_init(); +} + +static const char *imx6q_dt_compat[] __initconst = { + "fsl,imx6dl", + "fsl,imx6q", NULL, }; -DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)") +DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)") + .smp = smp_ops(imx_smp_ops), .map_io = imx6q_map_io, .init_irq = imx6q_init_irq, - .handle_irq = imx6q_handle_irq, - .timer = &imx6q_timer, .init_machine = imx6q_init_machine, + .init_late = imx6q_init_late, .dt_compat = imx6q_dt_compat, - .restart = imx6q_restart, + .restart = mxc_restart, MACHINE_END |