diff options
Diffstat (limited to 'arch/arm/mach-tegra/pinmux.c')
| -rw-r--r-- | arch/arm/mach-tegra/pinmux.c | 987 |
1 files changed, 987 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/pinmux.c b/arch/arm/mach-tegra/pinmux.c new file mode 100644 index 00000000..ac35d2b7 --- /dev/null +++ b/arch/arm/mach-tegra/pinmux.c @@ -0,0 +1,987 @@ +/* + * linux/arch/arm/mach-tegra/pinmux.c + * + * Copyright (C) 2010 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/spinlock.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/of_device.h> + +#include <mach/iomap.h> +#include <mach/pinmux.h> + +#define HSM_EN(reg) (((reg) >> 2) & 0x1) +#define SCHMT_EN(reg) (((reg) >> 3) & 0x1) +#define LPMD(reg) (((reg) >> 4) & 0x3) +#define DRVDN(reg) (((reg) >> 12) & 0x1f) +#define DRVUP(reg) (((reg) >> 20) & 0x1f) +#define SLWR(reg) (((reg) >> 28) & 0x3) +#define SLWF(reg) (((reg) >> 30) & 0x3) + +static const struct tegra_pingroup_desc *pingroups; +static const struct tegra_drive_pingroup_desc *drive_pingroups; +static int pingroup_max; +static int drive_max; + +static char *tegra_mux_names[TEGRA_MAX_MUX] = { + [TEGRA_MUX_AHB_CLK] = "AHB_CLK", + [TEGRA_MUX_APB_CLK] = "APB_CLK", + [TEGRA_MUX_AUDIO_SYNC] = "AUDIO_SYNC", + [TEGRA_MUX_CRT] = "CRT", + [TEGRA_MUX_DAP1] = "DAP1", + [TEGRA_MUX_DAP2] = "DAP2", + [TEGRA_MUX_DAP3] = "DAP3", + [TEGRA_MUX_DAP4] = "DAP4", + [TEGRA_MUX_DAP5] = "DAP5", + [TEGRA_MUX_DISPLAYA] = "DISPLAYA", + [TEGRA_MUX_DISPLAYB] = "DISPLAYB", + [TEGRA_MUX_EMC_TEST0_DLL] = "EMC_TEST0_DLL", + [TEGRA_MUX_EMC_TEST1_DLL] = "EMC_TEST1_DLL", + [TEGRA_MUX_GMI] = "GMI", + [TEGRA_MUX_GMI_INT] = "GMI_INT", + [TEGRA_MUX_HDMI] = "HDMI", + [TEGRA_MUX_I2C] = "I2C", + [TEGRA_MUX_I2C2] = "I2C2", + [TEGRA_MUX_I2C3] = "I2C3", + [TEGRA_MUX_IDE] = "IDE", + [TEGRA_MUX_IRDA] = "IRDA", + [TEGRA_MUX_KBC] = "KBC", + [TEGRA_MUX_MIO] = "MIO", + [TEGRA_MUX_MIPI_HS] = "MIPI_HS", + [TEGRA_MUX_NAND] = "NAND", + [TEGRA_MUX_OSC] = "OSC", + [TEGRA_MUX_OWR] = "OWR", + [TEGRA_MUX_PCIE] = "PCIE", + [TEGRA_MUX_PLLA_OUT] = "PLLA_OUT", + [TEGRA_MUX_PLLC_OUT1] = "PLLC_OUT1", + [TEGRA_MUX_PLLM_OUT1] = "PLLM_OUT1", + [TEGRA_MUX_PLLP_OUT2] = "PLLP_OUT2", + [TEGRA_MUX_PLLP_OUT3] = "PLLP_OUT3", + [TEGRA_MUX_PLLP_OUT4] = "PLLP_OUT4", + [TEGRA_MUX_PWM] = "PWM", + [TEGRA_MUX_PWR_INTR] = "PWR_INTR", + [TEGRA_MUX_PWR_ON] = "PWR_ON", + [TEGRA_MUX_RTCK] = "RTCK", + [TEGRA_MUX_SDIO1] = "SDIO1", + [TEGRA_MUX_SDIO2] = "SDIO2", + [TEGRA_MUX_SDIO3] = "SDIO3", + [TEGRA_MUX_SDIO4] = "SDIO4", + [TEGRA_MUX_SFLASH] = "SFLASH", + [TEGRA_MUX_SPDIF] = "SPDIF", + [TEGRA_MUX_SPI1] = "SPI1", + [TEGRA_MUX_SPI2] = "SPI2", + [TEGRA_MUX_SPI2_ALT] = "SPI2_ALT", + [TEGRA_MUX_SPI3] = "SPI3", + [TEGRA_MUX_SPI4] = "SPI4", + [TEGRA_MUX_TRACE] = "TRACE", + [TEGRA_MUX_TWC] = "TWC", + [TEGRA_MUX_UARTA] = "UARTA", + [TEGRA_MUX_UARTB] = "UARTB", + [TEGRA_MUX_UARTC] = "UARTC", + [TEGRA_MUX_UARTD] = "UARTD", + [TEGRA_MUX_UARTE] = "UARTE", + [TEGRA_MUX_ULPI] = "ULPI", + [TEGRA_MUX_VI] = "VI", + [TEGRA_MUX_VI_SENSOR_CLK] = "VI_SENSOR_CLK", + [TEGRA_MUX_XIO] = "XIO", + [TEGRA_MUX_BLINK] = "BLINK", + [TEGRA_MUX_CEC] = "CEC", + [TEGRA_MUX_CLK12] = "CLK12", + [TEGRA_MUX_DAP] = "DAP", + [TEGRA_MUX_DAPSDMMC2] = "DAPSDMMC2", + [TEGRA_MUX_DDR] = "DDR", + [TEGRA_MUX_DEV3] = "DEV3", + [TEGRA_MUX_DTV] = "DTV", + [TEGRA_MUX_VI_ALT1] = "VI_ALT1", + [TEGRA_MUX_VI_ALT2] = "VI_ALT2", + [TEGRA_MUX_VI_ALT3] = "VI_ALT3", + [TEGRA_MUX_EMC_DLL] = "EMC_DLL", + [TEGRA_MUX_EXTPERIPH1] = "EXTPERIPH1", + [TEGRA_MUX_EXTPERIPH2] = "EXTPERIPH2", + [TEGRA_MUX_EXTPERIPH3] = "EXTPERIPH3", + [TEGRA_MUX_GMI_ALT] = "GMI_ALT", + [TEGRA_MUX_HDA] = "HDA", + [TEGRA_MUX_HSI] = "HSI", + [TEGRA_MUX_I2C4] = "I2C4", + [TEGRA_MUX_I2C5] = "I2C5", + [TEGRA_MUX_I2CPWR] = "I2CPWR", + [TEGRA_MUX_I2S0] = "I2S0", + [TEGRA_MUX_I2S1] = "I2S1", + [TEGRA_MUX_I2S2] = "I2S2", + [TEGRA_MUX_I2S3] = "I2S3", + [TEGRA_MUX_I2S4] = "I2S4", + [TEGRA_MUX_NAND_ALT] = "NAND_ALT", + [TEGRA_MUX_POPSDIO4] = "POPSDIO4", + [TEGRA_MUX_POPSDMMC4] = "POPSDMMC4", + [TEGRA_MUX_PWM0] = "PWM0", + [TEGRA_MUX_PWM1] = "PWM2", + [TEGRA_MUX_PWM2] = "PWM2", + [TEGRA_MUX_PWM3] = "PWM3", + [TEGRA_MUX_SATA] = "SATA", + [TEGRA_MUX_SPI5] = "SPI5", + [TEGRA_MUX_SPI6] = "SPI6", + [TEGRA_MUX_SYSCLK] = "SYSCLK", + [TEGRA_MUX_VGP1] = "VGP1", + [TEGRA_MUX_VGP2] = "VGP2", + [TEGRA_MUX_VGP3] = "VGP3", + [TEGRA_MUX_VGP4] = "VGP4", + [TEGRA_MUX_VGP5] = "VGP5", + [TEGRA_MUX_VGP6] = "VGP6", + [TEGRA_MUX_SAFE] = "<safe>", +}; + +static const char *tegra_drive_names[TEGRA_MAX_DRIVE] = { + [TEGRA_DRIVE_DIV_8] = "DIV_8", + [TEGRA_DRIVE_DIV_4] = "DIV_4", + [TEGRA_DRIVE_DIV_2] = "DIV_2", + [TEGRA_DRIVE_DIV_1] = "DIV_1", +}; + +static const char *tegra_slew_names[TEGRA_MAX_SLEW] = { + [TEGRA_SLEW_FASTEST] = "FASTEST", + [TEGRA_SLEW_FAST] = "FAST", + [TEGRA_SLEW_SLOW] = "SLOW", + [TEGRA_SLEW_SLOWEST] = "SLOWEST", +}; + +static DEFINE_SPINLOCK(mux_lock); + +static const char *pingroup_name(int pg) +{ + if (pg < 0 || pg >= pingroup_max) + return "<UNKNOWN>"; + + return pingroups[pg].name; +} + +static const char *func_name(enum tegra_mux_func func) +{ + if (func == TEGRA_MUX_RSVD1) + return "RSVD1"; + + if (func == TEGRA_MUX_RSVD2) + return "RSVD2"; + + if (func == TEGRA_MUX_RSVD3) + return "RSVD3"; + + if (func == TEGRA_MUX_RSVD4) + return "RSVD4"; + + if (func == TEGRA_MUX_NONE) + return "NONE"; + + if (func < 0 || func >= TEGRA_MAX_MUX) + return "<UNKNOWN>"; + + return tegra_mux_names[func]; +} + + +static const char *tri_name(unsigned long val) +{ + return val ? "TRISTATE" : "NORMAL"; +} + +static const char *pupd_name(unsigned long val) +{ + switch (val) { + case 0: + return "NORMAL"; + + case 1: + return "PULL_DOWN"; + + case 2: + return "PULL_UP"; + + default: + return "RSVD"; + } +} + +static int nbanks; +static void __iomem **regs; + +static inline u32 pg_readl(u32 bank, u32 reg) +{ + return readl(regs[bank] + reg); +} + +static inline void pg_writel(u32 val, u32 bank, u32 reg) +{ + writel(val, regs[bank] + reg); +} + +static int tegra_pinmux_set_func(const struct tegra_pingroup_config *config) +{ + int mux = -1; + int i; + unsigned long reg; + unsigned long flags; + int pg = config->pingroup; + enum tegra_mux_func func = config->func; + + if (pg < 0 || pg >= pingroup_max) + return -ERANGE; + + if (pingroups[pg].mux_reg < 0) + return -EINVAL; + + if (func < 0) + return -ERANGE; + + if (func == TEGRA_MUX_SAFE) + func = pingroups[pg].func_safe; + + if (func & TEGRA_MUX_RSVD) { + mux = func & 0x3; + } else { + for (i = 0; i < 4; i++) { + if (pingroups[pg].funcs[i] == func) { + mux = i; + break; + } + } + } + + if (mux < 0) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(pingroups[pg].mux_bank, pingroups[pg].mux_reg); + reg &= ~(0x3 << pingroups[pg].mux_bit); + reg |= mux << pingroups[pg].mux_bit; + pg_writel(reg, pingroups[pg].mux_bank, pingroups[pg].mux_reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +int tegra_pinmux_set_tristate(int pg, enum tegra_tristate tristate) +{ + unsigned long reg; + unsigned long flags; + + if (pg < 0 || pg >= pingroup_max) + return -ERANGE; + + if (pingroups[pg].tri_reg < 0) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(pingroups[pg].tri_bank, pingroups[pg].tri_reg); + reg &= ~(0x1 << pingroups[pg].tri_bit); + if (tristate) + reg |= 1 << pingroups[pg].tri_bit; + pg_writel(reg, pingroups[pg].tri_bank, pingroups[pg].tri_reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +int tegra_pinmux_set_pullupdown(int pg, enum tegra_pullupdown pupd) +{ + unsigned long reg; + unsigned long flags; + + if (pg < 0 || pg >= pingroup_max) + return -ERANGE; + + if (pingroups[pg].pupd_reg < 0) + return -EINVAL; + + if (pupd != TEGRA_PUPD_NORMAL && + pupd != TEGRA_PUPD_PULL_DOWN && + pupd != TEGRA_PUPD_PULL_UP) + return -EINVAL; + + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(pingroups[pg].pupd_bank, pingroups[pg].pupd_reg); + reg &= ~(0x3 << pingroups[pg].pupd_bit); + reg |= pupd << pingroups[pg].pupd_bit; + pg_writel(reg, pingroups[pg].pupd_bank, pingroups[pg].pupd_reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static void tegra_pinmux_config_pingroup(const struct tegra_pingroup_config *config) +{ + int pingroup = config->pingroup; + enum tegra_mux_func func = config->func; + enum tegra_pullupdown pupd = config->pupd; + enum tegra_tristate tristate = config->tristate; + int err; + + if (pingroups[pingroup].mux_reg >= 0) { + err = tegra_pinmux_set_func(config); + if (err < 0) + pr_err("pinmux: can't set pingroup %s func to %s: %d\n", + pingroup_name(pingroup), func_name(func), err); + } + + if (pingroups[pingroup].pupd_reg >= 0) { + err = tegra_pinmux_set_pullupdown(pingroup, pupd); + if (err < 0) + pr_err("pinmux: can't set pingroup %s pullupdown to %s: %d\n", + pingroup_name(pingroup), pupd_name(pupd), err); + } + + if (pingroups[pingroup].tri_reg >= 0) { + err = tegra_pinmux_set_tristate(pingroup, tristate); + if (err < 0) + pr_err("pinmux: can't set pingroup %s tristate to %s: %d\n", + pingroup_name(pingroup), tri_name(func), err); + } +} + +void tegra_pinmux_config_table(const struct tegra_pingroup_config *config, int len) +{ + int i; + + for (i = 0; i < len; i++) + tegra_pinmux_config_pingroup(&config[i]); +} + +static const char *drive_pinmux_name(int pg) +{ + if (pg < 0 || pg >= drive_max) + return "<UNKNOWN>"; + + return drive_pingroups[pg].name; +} + +static const char *enable_name(unsigned long val) +{ + return val ? "ENABLE" : "DISABLE"; +} + +static const char *drive_name(unsigned long val) +{ + if (val >= TEGRA_MAX_DRIVE) + return "<UNKNOWN>"; + + return tegra_drive_names[val]; +} + +static const char *slew_name(unsigned long val) +{ + if (val >= TEGRA_MAX_SLEW) + return "<UNKNOWN>"; + + return tegra_slew_names[val]; +} + +static int tegra_drive_pinmux_set_hsm(int pg, enum tegra_hsm hsm) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (hsm != TEGRA_HSM_ENABLE && hsm != TEGRA_HSM_DISABLE) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + if (hsm == TEGRA_HSM_ENABLE) + reg |= (1 << 2); + else + reg &= ~(1 << 2); + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_schmitt(int pg, enum tegra_schmitt schmitt) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (schmitt != TEGRA_SCHMITT_ENABLE && schmitt != TEGRA_SCHMITT_DISABLE) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + if (schmitt == TEGRA_SCHMITT_ENABLE) + reg |= (1 << 3); + else + reg &= ~(1 << 3); + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_drive(int pg, enum tegra_drive drive) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (drive < 0 || drive >= TEGRA_MAX_DRIVE) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + reg &= ~(0x3 << 4); + reg |= drive << 4; + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_pull_down(int pg, + enum tegra_pull_strength pull_down) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (pull_down < 0 || pull_down >= TEGRA_MAX_PULL) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + reg &= ~(0x1f << 12); + reg |= pull_down << 12; + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_pull_up(int pg, + enum tegra_pull_strength pull_up) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (pull_up < 0 || pull_up >= TEGRA_MAX_PULL) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + reg &= ~(0x1f << 12); + reg |= pull_up << 12; + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_slew_rising(int pg, + enum tegra_slew slew_rising) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (slew_rising < 0 || slew_rising >= TEGRA_MAX_SLEW) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + reg &= ~(0x3 << 28); + reg |= slew_rising << 28; + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static int tegra_drive_pinmux_set_slew_falling(int pg, + enum tegra_slew slew_falling) +{ + unsigned long flags; + u32 reg; + if (pg < 0 || pg >= drive_max) + return -ERANGE; + + if (slew_falling < 0 || slew_falling >= TEGRA_MAX_SLEW) + return -EINVAL; + + spin_lock_irqsave(&mux_lock, flags); + + reg = pg_readl(drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + reg &= ~(0x3 << 30); + reg |= slew_falling << 30; + pg_writel(reg, drive_pingroups[pg].reg_bank, drive_pingroups[pg].reg); + + spin_unlock_irqrestore(&mux_lock, flags); + + return 0; +} + +static void tegra_drive_pinmux_config_pingroup(int pingroup, + enum tegra_hsm hsm, + enum tegra_schmitt schmitt, + enum tegra_drive drive, + enum tegra_pull_strength pull_down, + enum tegra_pull_strength pull_up, + enum tegra_slew slew_rising, + enum tegra_slew slew_falling) +{ + int err; + + err = tegra_drive_pinmux_set_hsm(pingroup, hsm); + if (err < 0) + pr_err("pinmux: can't set pingroup %s hsm to %s: %d\n", + drive_pinmux_name(pingroup), + enable_name(hsm), err); + + err = tegra_drive_pinmux_set_schmitt(pingroup, schmitt); + if (err < 0) + pr_err("pinmux: can't set pingroup %s schmitt to %s: %d\n", + drive_pinmux_name(pingroup), + enable_name(schmitt), err); + + err = tegra_drive_pinmux_set_drive(pingroup, drive); + if (err < 0) + pr_err("pinmux: can't set pingroup %s drive to %s: %d\n", + drive_pinmux_name(pingroup), + drive_name(drive), err); + + err = tegra_drive_pinmux_set_pull_down(pingroup, pull_down); + if (err < 0) + pr_err("pinmux: can't set pingroup %s pull down to %d: %d\n", + drive_pinmux_name(pingroup), + pull_down, err); + + err = tegra_drive_pinmux_set_pull_up(pingroup, pull_up); + if (err < 0) + pr_err("pinmux: can't set pingroup %s pull up to %d: %d\n", + drive_pinmux_name(pingroup), + pull_up, err); + + err = tegra_drive_pinmux_set_slew_rising(pingroup, slew_rising); + if (err < 0) + pr_err("pinmux: can't set pingroup %s rising slew to %s: %d\n", + drive_pinmux_name(pingroup), + slew_name(slew_rising), err); + + err = tegra_drive_pinmux_set_slew_falling(pingroup, slew_falling); + if (err < 0) + pr_err("pinmux: can't set pingroup %s falling slew to %s: %d\n", + drive_pinmux_name(pingroup), + slew_name(slew_falling), err); +} + +void tegra_drive_pinmux_config_table(struct tegra_drive_pingroup_config *config, + int len) +{ + int i; + + for (i = 0; i < len; i++) + tegra_drive_pinmux_config_pingroup(config[i].pingroup, + config[i].hsm, + config[i].schmitt, + config[i].drive, + config[i].pull_down, + config[i].pull_up, + config[i].slew_rising, + config[i].slew_falling); +} + +void tegra_pinmux_set_safe_pinmux_table(const struct tegra_pingroup_config *config, + int len) +{ + int i; + struct tegra_pingroup_config c; + + for (i = 0; i < len; i++) { + int err; + c = config[i]; + if (c.pingroup < 0 || c.pingroup >= pingroup_max) { + WARN_ON(1); + continue; + } + c.func = pingroups[c.pingroup].func_safe; + err = tegra_pinmux_set_func(&c); + if (err < 0) + pr_err("%s: tegra_pinmux_set_func returned %d setting " + "%s to %s\n", __func__, err, + pingroup_name(c.pingroup), func_name(c.func)); + } +} + +void tegra_pinmux_config_pinmux_table(const struct tegra_pingroup_config *config, + int len) +{ + int i; + + for (i = 0; i < len; i++) { + int err; + if (config[i].pingroup < 0 || + config[i].pingroup >= pingroup_max) { + WARN_ON(1); + continue; + } + err = tegra_pinmux_set_func(&config[i]); + if (err < 0) + pr_err("%s: tegra_pinmux_set_func returned %d setting " + "%s to %s\n", __func__, err, + pingroup_name(config[i].pingroup), + func_name(config[i].func)); + } +} + +void tegra_pinmux_config_tristate_table(const struct tegra_pingroup_config *config, + int len, enum tegra_tristate tristate) +{ + int i; + int err; + int pingroup; + + for (i = 0; i < len; i++) { + pingroup = config[i].pingroup; + if (pingroups[pingroup].tri_reg >= 0) { + err = tegra_pinmux_set_tristate(pingroup, tristate); + if (err < 0) + pr_err("pinmux: can't set pingroup %s tristate" + " to %s: %d\n", pingroup_name(pingroup), + tri_name(tristate), err); + } + } +} + +void tegra_pinmux_config_pullupdown_table(const struct tegra_pingroup_config *config, + int len, enum tegra_pullupdown pupd) +{ + int i; + int err; + int pingroup; + + for (i = 0; i < len; i++) { + pingroup = config[i].pingroup; + if (pingroups[pingroup].pupd_reg >= 0) { + err = tegra_pinmux_set_pullupdown(pingroup, pupd); + if (err < 0) + pr_err("pinmux: can't set pingroup %s pullupdown" + " to %s: %d\n", pingroup_name(pingroup), + pupd_name(pupd), err); + } + } +} + +static struct of_device_id tegra_pinmux_of_match[] __devinitdata = { +#ifdef CONFIG_ARCH_TEGRA_2x_SOC + { .compatible = "nvidia,tegra20-pinmux", tegra20_pinmux_init }, +#endif +#ifdef CONFIG_ARCH_TEGRA_3x_SOC + { .compatible = "nvidia,tegra30-pinmux", tegra30_pinmux_init }, +#endif + { }, +}; + +static int __devinit tegra_pinmux_probe(struct platform_device *pdev) +{ + struct resource *res; + int i; + int config_bad = 0; + const struct of_device_id *match; + + match = of_match_device(tegra_pinmux_of_match, &pdev->dev); + + if (match) + ((pinmux_init)(match->data))(&pingroups, &pingroup_max, + &drive_pingroups, &drive_max); +#ifdef CONFIG_ARCH_TEGRA_2x_SOC + else + /* no device tree available, so we must be on tegra20 */ + tegra20_pinmux_init(&pingroups, &pingroup_max, + &drive_pingroups, &drive_max); +#else + pr_warn("non Tegra20 platform requires pinmux devicetree node\n"); +#endif + + for (i = 0; ; i++) { + res = platform_get_resource(pdev, IORESOURCE_MEM, i); + if (!res) + break; + } + nbanks = i; + + for (i = 0; i < pingroup_max; i++) { + if (pingroups[i].tri_bank >= nbanks) { + dev_err(&pdev->dev, "pingroup %d: bad tri_bank\n", i); + config_bad = 1; + } + + if (pingroups[i].mux_bank >= nbanks) { + dev_err(&pdev->dev, "pingroup %d: bad mux_bank\n", i); + config_bad = 1; + } + + if (pingroups[i].pupd_bank >= nbanks) { + dev_err(&pdev->dev, "pingroup %d: bad pupd_bank\n", i); + config_bad = 1; + } + } + + for (i = 0; i < drive_max; i++) { + if (drive_pingroups[i].reg_bank >= nbanks) { + dev_err(&pdev->dev, + "drive pingroup %d: bad reg_bank\n", i); + config_bad = 1; + } + } + + if (config_bad) + return -ENODEV; + + regs = devm_kzalloc(&pdev->dev, nbanks * sizeof(*regs), GFP_KERNEL); + if (!regs) { + dev_err(&pdev->dev, "Can't alloc regs pointer\n"); + return -ENODEV; + } + + for (i = 0; i < nbanks; i++) { + res = platform_get_resource(pdev, IORESOURCE_MEM, i); + if (!res) { + dev_err(&pdev->dev, "Missing MEM resource\n"); + return -ENODEV; + } + + if (!devm_request_mem_region(&pdev->dev, res->start, + resource_size(res), + dev_name(&pdev->dev))) { + dev_err(&pdev->dev, + "Couldn't request MEM resource %d\n", i); + return -ENODEV; + } + + regs[i] = devm_ioremap(&pdev->dev, res->start, + resource_size(res)); + if (!regs) { + dev_err(&pdev->dev, "Couldn't ioremap regs %d\n", i); + return -ENODEV; + } + } + + return 0; +} + +static struct platform_driver tegra_pinmux_driver = { + .driver = { + .name = "tegra-pinmux", + .owner = THIS_MODULE, + .of_match_table = tegra_pinmux_of_match, + }, + .probe = tegra_pinmux_probe, +}; + +static int __init tegra_pinmux_init(void) +{ + return platform_driver_register(&tegra_pinmux_driver); +} +postcore_initcall(tegra_pinmux_init); + +#ifdef CONFIG_DEBUG_FS + +#include <linux/debugfs.h> +#include <linux/seq_file.h> + +static void dbg_pad_field(struct seq_file *s, int len) +{ + seq_putc(s, ','); + + while (len-- > -1) + seq_putc(s, ' '); +} + +static int dbg_pinmux_show(struct seq_file *s, void *unused) +{ + int i; + int len; + + for (i = 0; i < pingroup_max; i++) { + unsigned long reg; + unsigned long tri; + unsigned long mux; + unsigned long pupd; + + seq_printf(s, "\t{TEGRA_PINGROUP_%s", pingroups[i].name); + len = strlen(pingroups[i].name); + dbg_pad_field(s, 5 - len); + + if (pingroups[i].mux_reg < 0) { + seq_printf(s, "TEGRA_MUX_NONE"); + len = strlen("NONE"); + } else { + reg = pg_readl(pingroups[i].mux_bank, + pingroups[i].mux_reg); + mux = (reg >> pingroups[i].mux_bit) & 0x3; + if (pingroups[i].funcs[mux] == TEGRA_MUX_RSVD) { + seq_printf(s, "TEGRA_MUX_RSVD%1lu", mux+1); + len = 5; + } else { + seq_printf(s, "TEGRA_MUX_%s", + tegra_mux_names[pingroups[i].funcs[mux]]); + len = strlen(tegra_mux_names[pingroups[i].funcs[mux]]); + } + } + dbg_pad_field(s, 13-len); + + if (pingroups[i].pupd_reg < 0) { + seq_printf(s, "TEGRA_PUPD_NORMAL"); + len = strlen("NORMAL"); + } else { + reg = pg_readl(pingroups[i].pupd_bank, + pingroups[i].pupd_reg); + pupd = (reg >> pingroups[i].pupd_bit) & 0x3; + seq_printf(s, "TEGRA_PUPD_%s", pupd_name(pupd)); + len = strlen(pupd_name(pupd)); + } + dbg_pad_field(s, 9 - len); + + if (pingroups[i].tri_reg < 0) { + seq_printf(s, "TEGRA_TRI_NORMAL"); + } else { + reg = pg_readl(pingroups[i].tri_bank, + pingroups[i].tri_reg); + tri = (reg >> pingroups[i].tri_bit) & 0x1; + + seq_printf(s, "TEGRA_TRI_%s", tri_name(tri)); + } + seq_printf(s, "},\n"); + } + return 0; +} + +static int dbg_pinmux_open(struct inode *inode, struct file *file) +{ + return single_open(file, dbg_pinmux_show, &inode->i_private); +} + +static const struct file_operations debug_fops = { + .open = dbg_pinmux_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int dbg_drive_pinmux_show(struct seq_file *s, void *unused) +{ + int i; + int len; + + for (i = 0; i < drive_max; i++) { + u32 reg; + + seq_printf(s, "\t{TEGRA_DRIVE_PINGROUP_%s", + drive_pingroups[i].name); + len = strlen(drive_pingroups[i].name); + dbg_pad_field(s, 7 - len); + + + reg = pg_readl(drive_pingroups[i].reg_bank, + drive_pingroups[i].reg); + if (HSM_EN(reg)) { + seq_printf(s, "TEGRA_HSM_ENABLE"); + len = 16; + } else { + seq_printf(s, "TEGRA_HSM_DISABLE"); + len = 17; + } + dbg_pad_field(s, 17 - len); + + if (SCHMT_EN(reg)) { + seq_printf(s, "TEGRA_SCHMITT_ENABLE"); + len = 21; + } else { + seq_printf(s, "TEGRA_SCHMITT_DISABLE"); + len = 22; + } + dbg_pad_field(s, 22 - len); + + seq_printf(s, "TEGRA_DRIVE_%s", drive_name(LPMD(reg))); + len = strlen(drive_name(LPMD(reg))); + dbg_pad_field(s, 5 - len); + + seq_printf(s, "TEGRA_PULL_%d", DRVDN(reg)); + len = DRVDN(reg) < 10 ? 1 : 2; + dbg_pad_field(s, 2 - len); + + seq_printf(s, "TEGRA_PULL_%d", DRVUP(reg)); + len = DRVUP(reg) < 10 ? 1 : 2; + dbg_pad_field(s, 2 - len); + + seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWR(reg))); + len = strlen(slew_name(SLWR(reg))); + dbg_pad_field(s, 7 - len); + + seq_printf(s, "TEGRA_SLEW_%s", slew_name(SLWF(reg))); + + seq_printf(s, "},\n"); + } + return 0; +} + +static int dbg_drive_pinmux_open(struct inode *inode, struct file *file) +{ + return single_open(file, dbg_drive_pinmux_show, &inode->i_private); +} + +static const struct file_operations debug_drive_fops = { + .open = dbg_drive_pinmux_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static int __init tegra_pinmux_debuginit(void) +{ + (void) debugfs_create_file("tegra_pinmux", S_IRUGO, + NULL, NULL, &debug_fops); + (void) debugfs_create_file("tegra_pinmux_drive", S_IRUGO, + NULL, NULL, &debug_drive_fops); + return 0; +} +late_initcall(tegra_pinmux_debuginit); +#endif |