linux/arch/arm/mach-tegra/pinmux.c
Colin Cross c5f04b8d10 [ARM] tegra: pinmux: add safe values, move tegra2, add suspend
- the reset values for some pin groups in the tegra pin mux can result in
functional errors due to conflicting with actively-configured pin groups
muxing from the same controller. this change adds a known safe, non-
conflicting mux for every pin group, which can be used on platforms
where the pin group is not routed to any peripheral

- also add each pin group's I/O voltage rail, to enable platform code to
map from the pin groups used by each interface to the regulators used
for dynamic voltage control

- add routines to individually configure the tristate, pin mux and pull-
ups for a pingroup_config array, so that it is possible to program
individual values at run-time without modifying other values.
this allows driver power-management code to reprogram individual
interfaces into lower power states during idle / suspend, or to
reprogram the pin mux to support multiple physical busses per
internal controller (e.g., sharing a single I2C or SPI controller
across multiple pin groups)

- move chip-specific data like pingroups and drive-pingroups
out of the common code and into chip-specific code

- fix debug output for group with no pullups

- add a TEGRA_MUX_SAFE function.  Setting a pingroup to TEGRA_MUX_SAFE
will automatically select a mux setting that is guaranteed not to
conflict with any of the hardware blocks.

Signed-off-by: Gary King <gking@nvidia.com>
2010-10-21 18:11:41 -07:00

826 lines
19 KiB
C

/*
* 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 <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 inline unsigned long pg_readl(unsigned long offset)
{
return readl(IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
}
static inline void pg_writel(unsigned long value, unsigned long offset)
{
writel(value, IO_TO_VIRT(TEGRA_APB_MISC_BASE + offset));
}
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_reg);
reg &= ~(0x3 << pingroups[pg].mux_bit);
reg |= mux << pingroups[pg].mux_bit;
pg_writel(reg, 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_reg);
reg &= ~(0x1 << pingroups[pg].tri_bit);
if (tristate)
reg |= 1 << pingroups[pg].tri_bit;
pg_writel(reg, 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_reg);
reg &= ~(0x3 << pingroups[pg].pupd_bit);
reg |= pupd << pingroups[pg].pupd_bit;
pg_writel(reg, 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);
if (hsm == TEGRA_HSM_ENABLE)
reg |= (1 << 2);
else
reg &= ~(1 << 2);
pg_writel(reg, 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);
if (schmitt == TEGRA_SCHMITT_ENABLE)
reg |= (1 << 3);
else
reg &= ~(1 << 3);
pg_writel(reg, 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);
reg &= ~(0x3 << 4);
reg |= drive << 4;
pg_writel(reg, 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);
reg &= ~(0x1f << 12);
reg |= pull_down << 12;
pg_writel(reg, 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);
reg &= ~(0x1f << 12);
reg |= pull_up << 12;
pg_writel(reg, 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);
reg &= ~(0x3 << 28);
reg |= slew_rising << 28;
pg_writel(reg, 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);
reg &= ~(0x3 << 30);
reg |= slew_falling << 30;
pg_writel(reg, 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);
}
}
}
#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 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 {
mux = (pg_readl(pingroups[i].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 {
pupd = (pg_readl(pingroups[i].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 {
tri = (pg_readl(pingroups[i].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);
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