| /* |
| * 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 <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 *const pingroups = tegra_soc_pingroups; |
| static const struct tegra_drive_pingroup_desc *const drive_pingroups = tegra_soc_drive_pingroups; |
| |
| 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_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(enum tegra_pingroup pg) |
| { |
| if (pg < 0 || pg >= TEGRA_MAX_PINGROUP) |
| 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; |
| enum tegra_pingroup pg = config->pingroup; |
| enum tegra_mux_func func = config->func; |
| |
| if (pg < 0 || pg >= TEGRA_MAX_PINGROUP) |
| 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(enum tegra_pingroup pg, |
| enum tegra_tristate tristate) |
| { |
| unsigned long reg; |
| unsigned long flags; |
| |
| if (pg < 0 || pg >= TEGRA_MAX_PINGROUP) |
| 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(enum tegra_pingroup pg, |
| enum tegra_pullupdown pupd) |
| { |
| unsigned long reg; |
| unsigned long flags; |
| |
| if (pg < 0 || pg >= TEGRA_MAX_PINGROUP) |
| 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) |
| { |
| enum tegra_pingroup 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(enum tegra_drive_pingroup pg) |
| { |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_hsm hsm) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_schmitt schmitt) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_drive drive) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_pull_strength pull_down) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_pull_strength pull_up) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_slew slew_rising) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup pg, |
| enum tegra_slew slew_falling) |
| { |
| unsigned long flags; |
| u32 reg; |
| if (pg < 0 || pg >= TEGRA_MAX_DRIVE_PINGROUP) |
| 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(enum tegra_drive_pingroup 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 >= TEGRA_MAX_PINGROUP) { |
| 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 >= TEGRA_MAX_PINGROUP) { |
| 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; |
| enum tegra_pingroup 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; |
| enum tegra_pingroup 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 int __devinit tegra_pinmux_probe(struct platform_device *pdev) |
| { |
| struct resource *res; |
| int i; |
| int config_bad = 0; |
| |
| for (i = 0; ; i++) { |
| res = platform_get_resource(pdev, IORESOURCE_MEM, i); |
| if (!res) |
| break; |
| } |
| nbanks = i; |
| |
| for (i = 0; i < TEGRA_MAX_PINGROUP; 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 < TEGRA_MAX_DRIVE_PINGROUP; 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 of_device_id tegra_pinmux_of_match[] __devinitdata = { |
| { .compatible = "nvidia,tegra20-pinmux", }, |
| { }, |
| }; |
| |
| 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 < TEGRA_MAX_PINGROUP; 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 < TEGRA_MAX_DRIVE_PINGROUP; 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 |
