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Commit a18d7f96 authored by Paul Mundt's avatar Paul Mundt
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Merge branch 'common/pfc' into common/pinctrl

parents 2437fccf afae021a
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Showing with 953 additions and 18 deletions
drivers/sh/Kconfig
View file @ a18d7f96
menu "SuperH / SH-Mobile Driver Options"
source "drivers/sh/intc/Kconfig"
source "drivers/sh/pfc/Kconfig"
endmenu
drivers/sh/Makefile
View file @ a18d7f96
......@@ -5,6 +5,7 @@ obj-y := intc/
obj-$(CONFIG_HAVE_CLK) += clk/
obj-$(CONFIG_MAPLE) += maple/
obj-$(CONFIG_SH_PFC) += pfc/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-$(CONFIG_GENERIC_GPIO) += pfc.o
obj-y += pm_runtime.o
drivers/sh/pfc/Kconfig 0 → 100644
View file @ a18d7f96
comment "Pin function controller options"
config SH_PFC
# XXX move off the gpio dependency
depends on GENERIC_GPIO
select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
def_bool y
config GPIO_SH_PFC
tristate "SuperH PFC GPIO support"
depends on SH_PFC && GPIOLIB
help
This enables support for GPIOs within the SoC's pin function
controller.
drivers/sh/pfc/Makefile 0 → 100644
View file @ a18d7f96
obj-y += core.o
obj-$(CONFIG_GPIO_SH_PFC) += gpio.o
drivers/sh/pfc.c → drivers/sh/pfc/core.c
View file @ a18d7f96
/*
* Pinmuxed GPIO support for SuperH.
* SuperH Pin Function Controller support.
*
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2009 - 2012 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
......@@ -11,70 +12,74 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sh_pfc.h>
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/ioport.h>
static void pfc_iounmap(struct pinmux_info *pip)
static struct sh_pfc *sh_pfc __read_mostly;
static inline bool sh_pfc_initialized(void)
{
return !!sh_pfc;
}
static void pfc_iounmap(struct sh_pfc *pfc)
{
int k;
for (k = 0; k < pip->num_resources; k++)
if (pip->window[k].virt)
iounmap(pip->window[k].virt);
for (k = 0; k < pfc->num_resources; k++)
if (pfc->window[k].virt)
iounmap(pfc->window[k].virt);
kfree(pip->window);
pip->window = NULL;
kfree(pfc->window);
pfc->window = NULL;
}
static int pfc_ioremap(struct pinmux_info *pip)
static int pfc_ioremap(struct sh_pfc *pfc)
{
struct resource *res;
int k;
if (!pip->num_resources)
if (!pfc->num_resources)
return 0;
pip->window = kzalloc(pip->num_resources * sizeof(*pip->window),
pfc->window = kzalloc(pfc->num_resources * sizeof(*pfc->window),
GFP_NOWAIT);
if (!pip->window)
if (!pfc->window)
goto err1;
for (k = 0; k < pip->num_resources; k++) {
res = pip->resource + k;
for (k = 0; k < pfc->num_resources; k++) {
res = pfc->resource + k;
WARN_ON(resource_type(res) != IORESOURCE_MEM);
pip->window[k].phys = res->start;
pip->window[k].size = resource_size(res);
pip->window[k].virt = ioremap_nocache(res->start,
pfc->window[k].phys = res->start;
pfc->window[k].size = resource_size(res);
pfc->window[k].virt = ioremap_nocache(res->start,
resource_size(res));
if (!pip->window[k].virt)
if (!pfc->window[k].virt)
goto err2;
}
return 0;
err2:
pfc_iounmap(pip);
pfc_iounmap(pfc);
err1:
return -1;
}
static void __iomem *pfc_phys_to_virt(struct pinmux_info *pip,
static void __iomem *pfc_phys_to_virt(struct sh_pfc *pfc,
unsigned long address)
{
struct pfc_window *window;
int k;
/* scan through physical windows and convert address */
for (k = 0; k < pip->num_resources; k++) {
window = pip->window + k;
for (k = 0; k < pfc->num_resources; k++) {
window = pfc->window + k;
if (address < window->phys)
continue;
......@@ -135,8 +140,7 @@ static void gpio_write_raw_reg(void __iomem *mapped_reg,
BUG();
}
static int gpio_read_bit(struct pinmux_data_reg *dr,
unsigned long in_pos)
int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos)
{
unsigned long pos;
......@@ -147,9 +151,10 @@ static int gpio_read_bit(struct pinmux_data_reg *dr,
return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1;
}
EXPORT_SYMBOL_GPL(sh_pfc_read_bit);
static void gpio_write_bit(struct pinmux_data_reg *dr,
unsigned long in_pos, unsigned long value)
void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
unsigned long value)
{
unsigned long pos;
......@@ -166,8 +171,9 @@ static void gpio_write_bit(struct pinmux_data_reg *dr,
gpio_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow);
}
EXPORT_SYMBOL_GPL(sh_pfc_write_bit);
static void config_reg_helper(struct pinmux_info *gpioc,
static void config_reg_helper(struct sh_pfc *pfc,
struct pinmux_cfg_reg *crp,
unsigned long in_pos,
void __iomem **mapped_regp,
......@@ -176,7 +182,7 @@ static void config_reg_helper(struct pinmux_info *gpioc,
{
int k;
*mapped_regp = pfc_phys_to_virt(gpioc, crp->reg);
*mapped_regp = pfc_phys_to_virt(pfc, crp->reg);
if (crp->field_width) {
*maskp = (1 << crp->field_width) - 1;
......@@ -189,14 +195,14 @@ static void config_reg_helper(struct pinmux_info *gpioc,
}
}
static int read_config_reg(struct pinmux_info *gpioc,
static int read_config_reg(struct sh_pfc *pfc,
struct pinmux_cfg_reg *crp,
unsigned long field)
{
void __iomem *mapped_reg;
unsigned long mask, pos;
config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
pr_debug("read_reg: addr = %lx, field = %ld, "
"r_width = %ld, f_width = %ld\n",
......@@ -205,14 +211,14 @@ static int read_config_reg(struct pinmux_info *gpioc,
return (gpio_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask;
}
static void write_config_reg(struct pinmux_info *gpioc,
static void write_config_reg(struct sh_pfc *pfc,
struct pinmux_cfg_reg *crp,
unsigned long field, unsigned long value)
{
void __iomem *mapped_reg;
unsigned long mask, pos, data;
config_reg_helper(gpioc, crp, field, &mapped_reg, &mask, &pos);
config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos);
pr_debug("write_reg addr = %lx, value = %ld, field = %ld, "
"r_width = %ld, f_width = %ld\n",
......@@ -225,30 +231,30 @@ static void write_config_reg(struct pinmux_info *gpioc,
data &= mask;
data |= value;
if (gpioc->unlock_reg)
gpio_write_raw_reg(pfc_phys_to_virt(gpioc, gpioc->unlock_reg),
if (pfc->unlock_reg)
gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->unlock_reg),
32, ~data);
gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
}
static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)
static int setup_data_reg(struct sh_pfc *pfc, unsigned gpio)
{
struct pinmux_gpio *gpiop = &gpioc->gpios[gpio];
struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
struct pinmux_data_reg *data_reg;
int k, n;
if (!enum_in_range(gpiop->enum_id, &gpioc->data))
if (!enum_in_range(gpiop->enum_id, &pfc->data))
return -1;
k = 0;
while (1) {
data_reg = gpioc->data_regs + k;
data_reg = pfc->data_regs + k;
if (!data_reg->reg_width)
break;
data_reg->mapped_reg = pfc_phys_to_virt(gpioc, data_reg->reg);
data_reg->mapped_reg = pfc_phys_to_virt(pfc, data_reg->reg);
for (n = 0; n < data_reg->reg_width; n++) {
if (data_reg->enum_ids[n] == gpiop->enum_id) {
......@@ -267,17 +273,17 @@ static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio)
return -1;
}
static void setup_data_regs(struct pinmux_info *gpioc)
static void setup_data_regs(struct sh_pfc *pfc)
{
struct pinmux_data_reg *drp;
int k;
for (k = gpioc->first_gpio; k <= gpioc->last_gpio; k++)
setup_data_reg(gpioc, k);
for (k = pfc->first_gpio; k <= pfc->last_gpio; k++)
setup_data_reg(pfc, k);
k = 0;
while (1) {
drp = gpioc->data_regs + k;
drp = pfc->data_regs + k;
if (!drp->reg_width)
break;
......@@ -288,23 +294,24 @@ static void setup_data_regs(struct pinmux_info *gpioc)
}
}
static int get_data_reg(struct pinmux_info *gpioc, unsigned gpio,
int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
struct pinmux_data_reg **drp, int *bitp)
{
struct pinmux_gpio *gpiop = &gpioc->gpios[gpio];
struct pinmux_gpio *gpiop = &pfc->gpios[gpio];
int k, n;
if (!enum_in_range(gpiop->enum_id, &gpioc->data))
if (!enum_in_range(gpiop->enum_id, &pfc->data))
return -1;
k = (gpiop->flags & PINMUX_FLAG_DREG) >> PINMUX_FLAG_DREG_SHIFT;
n = (gpiop->flags & PINMUX_FLAG_DBIT) >> PINMUX_FLAG_DBIT_SHIFT;
*drp = gpioc->data_regs + k;
*drp = pfc->data_regs + k;
*bitp = n;
return 0;
}
EXPORT_SYMBOL_GPL(sh_pfc_get_data_reg);
static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id,
static int get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id,
struct pinmux_cfg_reg **crp,
int *fieldp, int *valuep,
unsigned long **cntp)
......@@ -315,7 +322,7 @@ static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id,
k = 0;
while (1) {
config_reg = gpioc->cfg_regs + k;
config_reg = pfc->cfg_regs + k;
r_width = config_reg->reg_width;
f_width = config_reg->field_width;
......@@ -350,15 +357,15 @@ static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id,
return -1;
}
static int get_gpio_enum_id(struct pinmux_info *gpioc, unsigned gpio,
int pos, pinmux_enum_t *enum_idp)
int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
pinmux_enum_t *enum_idp)
{
pinmux_enum_t enum_id = gpioc->gpios[gpio].enum_id;
pinmux_enum_t *data = gpioc->gpio_data;
pinmux_enum_t enum_id = pfc->gpios[gpio].enum_id;
pinmux_enum_t *data = pfc->gpio_data;
int k;
if (!enum_in_range(enum_id, &gpioc->data)) {
if (!enum_in_range(enum_id, &gpioc->mark)) {
if (!enum_in_range(enum_id, &pfc->data)) {
if (!enum_in_range(enum_id, &pfc->mark)) {
pr_err("non data/mark enum_id for gpio %d\n", gpio);
return -1;
}
......@@ -369,7 +376,7 @@ static int get_gpio_enum_id(struct pinmux_info *gpioc, unsigned gpio,
return pos + 1;
}
for (k = 0; k < gpioc->gpio_data_size; k++) {
for (k = 0; k < pfc->gpio_data_size; k++) {
if (data[k] == enum_id) {
*enum_idp = data[k + 1];
return k + 1;
......@@ -379,11 +386,10 @@ static int get_gpio_enum_id(struct pinmux_info *gpioc, unsigned gpio,
pr_err("cannot locate data/mark enum_id for gpio %d\n", gpio);
return -1;
}
EXPORT_SYMBOL_GPL(sh_pfc_gpio_to_enum);
enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE };
static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
int pinmux_type, int cfg_mode)
int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
int cfg_mode)
{
struct pinmux_cfg_reg *cr = NULL;
pinmux_enum_t enum_id;
......@@ -398,19 +404,19 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
break;
case PINMUX_TYPE_OUTPUT:
range = &gpioc->output;
range = &pfc->output;
break;
case PINMUX_TYPE_INPUT:
range = &gpioc->input;
range = &pfc->input;
break;
case PINMUX_TYPE_INPUT_PULLUP:
range = &gpioc->input_pu;
range = &pfc->input_pu;
break;
case PINMUX_TYPE_INPUT_PULLDOWN:
range = &gpioc->input_pd;
range = &pfc->input_pd;
break;
default:
......@@ -422,7 +428,7 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
field = 0;
value = 0;
while (1) {
pos = get_gpio_enum_id(gpioc, gpio, pos, &enum_id);
pos = sh_pfc_gpio_to_enum(pfc, gpio, pos, &enum_id);
if (pos <= 0)
goto out_err;
......@@ -430,7 +436,7 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
break;
/* first check if this is a function enum */
in_range = enum_in_range(enum_id, &gpioc->function);
in_range = enum_in_range(enum_id, &pfc->function);
if (!in_range) {
/* not a function enum */
if (range) {
......@@ -467,19 +473,19 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
if (!in_range)
continue;
if (get_config_reg(gpioc, enum_id, &cr,
if (get_config_reg(pfc, enum_id, &cr,
&field, &value, &cntp) != 0)
goto out_err;
switch (cfg_mode) {
case GPIO_CFG_DRYRUN:
if (!*cntp ||
(read_config_reg(gpioc, cr, field) != value))
(read_config_reg(pfc, cr, field) != value))
continue;
break;
case GPIO_CFG_REQ:
write_config_reg(gpioc, cr, field, value);
write_config_reg(pfc, cr, field, value);
*cntp = *cntp + 1;
break;
......@@ -493,89 +499,18 @@ static int pinmux_config_gpio(struct pinmux_info *gpioc, unsigned gpio,
out_err:
return -1;
}
EXPORT_SYMBOL_GPL(sh_pfc_config_gpio);
static DEFINE_SPINLOCK(gpio_lock);
static struct pinmux_info *chip_to_pinmux(struct gpio_chip *chip)
{
return container_of(chip, struct pinmux_info, chip);
}
static int sh_gpio_request(struct gpio_chip *chip, unsigned offset)
{
struct pinmux_info *gpioc = chip_to_pinmux(chip);
struct pinmux_data_reg *dummy;
unsigned long flags;
int i, ret, pinmux_type;
ret = -EINVAL;
if (!gpioc)
goto err_out;
spin_lock_irqsave(&gpio_lock, flags);
if ((gpioc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE)
goto err_unlock;
/* setup pin function here if no data is associated with pin */
if (get_data_reg(gpioc, offset, &dummy, &i) != 0)
pinmux_type = PINMUX_TYPE_FUNCTION;
else
pinmux_type = PINMUX_TYPE_GPIO;
if (pinmux_type == PINMUX_TYPE_FUNCTION) {
if (pinmux_config_gpio(gpioc, offset,
pinmux_type,
GPIO_CFG_DRYRUN) != 0)
goto err_unlock;
if (pinmux_config_gpio(gpioc, offset,
pinmux_type,
GPIO_CFG_REQ) != 0)
BUG();
}
gpioc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
gpioc->gpios[offset].flags |= pinmux_type;
ret = 0;
err_unlock:
spin_unlock_irqrestore(&gpio_lock, flags);
err_out:
return ret;
}
static void sh_gpio_free(struct gpio_chip *chip, unsigned offset)
{
struct pinmux_info *gpioc = chip_to_pinmux(chip);
unsigned long flags;
int pinmux_type;
if (!gpioc)
return;
spin_lock_irqsave(&gpio_lock, flags);
pinmux_type = gpioc->gpios[offset].flags & PINMUX_FLAG_TYPE;
pinmux_config_gpio(gpioc, offset, pinmux_type, GPIO_CFG_FREE);
gpioc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
gpioc->gpios[offset].flags |= PINMUX_TYPE_NONE;
spin_unlock_irqrestore(&gpio_lock, flags);
}
static int pinmux_direction(struct pinmux_info *gpioc,
unsigned gpio, int new_pinmux_type)
int sh_pfc_set_direction(struct sh_pfc *pfc, unsigned gpio,
int new_pinmux_type)
{
int pinmux_type;
int ret = -EINVAL;
if (!gpioc)
if (!pfc)
goto err_out;
pinmux_type = gpioc->gpios[gpio].flags & PINMUX_FLAG_TYPE;
pinmux_type = pfc->gpios[gpio].flags & PINMUX_FLAG_TYPE;
switch (pinmux_type) {
case PINMUX_TYPE_GPIO:
......@@ -584,156 +519,60 @@ static int pinmux_direction(struct pinmux_info *gpioc,
case PINMUX_TYPE_INPUT:
case PINMUX_TYPE_INPUT_PULLUP:
case PINMUX_TYPE_INPUT_PULLDOWN:
pinmux_config_gpio(gpioc, gpio, pinmux_type, GPIO_CFG_FREE);
sh_pfc_config_gpio(pfc, gpio, pinmux_type, GPIO_CFG_FREE);
break;
default:
goto err_out;
}
if (pinmux_config_gpio(gpioc, gpio,
if (sh_pfc_config_gpio(pfc, gpio,
new_pinmux_type,
GPIO_CFG_DRYRUN) != 0)
goto err_out;
if (pinmux_config_gpio(gpioc, gpio,
if (sh_pfc_config_gpio(pfc, gpio,
new_pinmux_type,
GPIO_CFG_REQ) != 0)
BUG();
gpioc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE;
gpioc->gpios[gpio].flags |= new_pinmux_type;
pfc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE;
pfc->gpios[gpio].flags |= new_pinmux_type;
ret = 0;
err_out:
return ret;
}
EXPORT_SYMBOL_GPL(sh_pfc_set_direction);
static int sh_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
struct pinmux_info *gpioc = chip_to_pinmux(chip);
unsigned long flags;
int ret;
spin_lock_irqsave(&gpio_lock, flags);
ret = pinmux_direction(gpioc, offset, PINMUX_TYPE_INPUT);
spin_unlock_irqrestore(&gpio_lock, flags);
return ret;
}
static void sh_gpio_set_value(struct pinmux_info *gpioc,
unsigned gpio, int value)
{
struct pinmux_data_reg *dr = NULL;
int bit = 0;
if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0)
BUG();
else
gpio_write_bit(dr, bit, value);
}
static int sh_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
int value)
int register_sh_pfc(struct sh_pfc *pfc)
{
struct pinmux_info *gpioc = chip_to_pinmux(chip);
unsigned long flags;
int (*initroutine)(struct sh_pfc *) = NULL;
int ret;
sh_gpio_set_value(gpioc, offset, value);
spin_lock_irqsave(&gpio_lock, flags);
ret = pinmux_direction(gpioc, offset, PINMUX_TYPE_OUTPUT);
spin_unlock_irqrestore(&gpio_lock, flags);
return ret;
}
static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio)
{
struct pinmux_data_reg *dr = NULL;
int bit = 0;
if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0)
return -EINVAL;
/*
* Ensure that the type encoding fits
*/
BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1));
return gpio_read_bit(dr, bit);
}
static int sh_gpio_get(struct gpio_chip *chip, unsigned offset)
{
return sh_gpio_get_value(chip_to_pinmux(chip), offset);
}
if (sh_pfc)
return -EBUSY;
static void sh_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
sh_gpio_set_value(chip_to_pinmux(chip), offset, value);
}
static int sh_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct pinmux_info *gpioc = chip_to_pinmux(chip);
pinmux_enum_t enum_id;
pinmux_enum_t *enum_ids;
int i, k, pos;
pos = 0;
enum_id = 0;
while (1) {
pos = get_gpio_enum_id(gpioc, offset, pos, &enum_id);
if (pos <= 0 || !enum_id)
break;
for (i = 0; i < gpioc->gpio_irq_size; i++) {
enum_ids = gpioc->gpio_irq[i].enum_ids;
for (k = 0; enum_ids[k]; k++) {
if (enum_ids[k] == enum_id)
return gpioc->gpio_irq[i].irq;
}
}
}
return -ENOSYS;
}
int register_pinmux(struct pinmux_info *pip)
{
struct gpio_chip *chip = &pip->chip;
int ret;
pr_info("%s handling gpio %d -> %d\n",
pip->name, pip->first_gpio, pip->last_gpio);
ret = pfc_ioremap(pip);
if (ret < 0)
ret = pfc_ioremap(pfc);
if (unlikely(ret < 0))
return ret;
setup_data_regs(pip);
chip->request = sh_gpio_request;
chip->free = sh_gpio_free;
chip->direction_input = sh_gpio_direction_input;
chip->get = sh_gpio_get;
chip->direction_output = sh_gpio_direction_output;
chip->set = sh_gpio_set;
chip->to_irq = sh_gpio_to_irq;
WARN_ON(pip->first_gpio != 0); /* needs testing */
spin_lock_init(&pfc->lock);
chip->label = pip->name;
chip->owner = THIS_MODULE;
chip->base = pip->first_gpio;
chip->ngpio = (pip->last_gpio - pip->first_gpio) + 1;
setup_data_regs(pfc);
ret = gpiochip_add(chip);
if (ret < 0)
pfc_iounmap(pip);
sh_pfc = pfc;
pr_info("%s support registered\n", pfc->name);
return ret;
}
initroutine = symbol_request(sh_pfc_register_gpiochip);
if (initroutine) {
(*initroutine)(pfc);
symbol_put_addr(initroutine);
}
int unregister_pinmux(struct pinmux_info *pip)
{
pr_info("%s deregistering\n", pip->name);
pfc_iounmap(pip);
return gpiochip_remove(&pip->chip);
return 0;
}
drivers/sh/pfc/gpio.c 0 → 100644
View file @ a18d7f96
/*
* SuperH Pin Function Controller GPIO driver.
*
* Copyright (C) 2008 Magnus Damm
* Copyright (C) 2009 - 2012 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/module.h>
#include <linux/platform_device.h>
struct sh_pfc_chip {
struct sh_pfc *pfc;
struct gpio_chip gpio_chip;
};
static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc)
{
return container_of(gc, struct sh_pfc_chip, gpio_chip);
}
static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc)
{
return gpio_to_pfc_chip(gc)->pfc;
}
static int sh_gpio_request(struct gpio_chip *gc, unsigned offset)
{
struct sh_pfc *pfc = gpio_to_pfc(gc);
struct pinmux_data_reg *dummy;
unsigned long flags;
int i, ret, pinmux_type;
ret = -EINVAL;
if (!pfc)
goto err_out;
spin_lock_irqsave(&pfc->lock, flags);
if ((pfc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE)
goto err_unlock;
/* setup pin function here if no data is associated with pin */
if (sh_pfc_get_data_reg(pfc, offset, &dummy, &i) != 0)
pinmux_type = PINMUX_TYPE_FUNCTION;
else
pinmux_type = PINMUX_TYPE_GPIO;
if (pinmux_type == PINMUX_TYPE_FUNCTION) {
if (sh_pfc_config_gpio(pfc, offset,
pinmux_type,
GPIO_CFG_DRYRUN) != 0)
goto err_unlock;
if (sh_pfc_config_gpio(pfc, offset,
pinmux_type,
GPIO_CFG_REQ) != 0)
BUG();
}
pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
pfc->gpios[offset].flags |= pinmux_type;
ret = 0;
err_unlock:
spin_unlock_irqrestore(&pfc->lock, flags);
err_out:
return ret;
}
static void sh_gpio_free(struct gpio_chip *gc, unsigned offset)
{
struct sh_pfc *pfc = gpio_to_pfc(gc);
unsigned long flags;
int pinmux_type;
if (!pfc)
return;
spin_lock_irqsave(&pfc->lock, flags);
pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE;
sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE);
pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
pfc->gpios[offset].flags |= PINMUX_TYPE_NONE;
spin_unlock_irqrestore(&pfc->lock, flags);
}
static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
struct sh_pfc *pfc = gpio_to_pfc(gc);
unsigned long flags;
int ret;
spin_lock_irqsave(&pfc->lock, flags);
ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_INPUT);
spin_unlock_irqrestore(&pfc->lock, flags);
return ret;
}
static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value)
{
struct pinmux_data_reg *dr = NULL;
int bit = 0;
if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
BUG();
else
sh_pfc_write_bit(dr, bit, value);
}
static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset,
int value)
{
struct sh_pfc *pfc = gpio_to_pfc(gc);
unsigned long flags;
int ret;
sh_gpio_set_value(pfc, offset, value);
spin_lock_irqsave(&pfc->lock, flags);
ret = sh_pfc_set_direction(pfc, offset, PINMUX_TYPE_OUTPUT);
spin_unlock_irqrestore(&pfc->lock, flags);
return ret;
}
static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio)
{
struct pinmux_data_reg *dr = NULL;
int bit = 0;
if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0)
return -EINVAL;
return sh_pfc_read_bit(dr, bit);
}
static int sh_gpio_get(struct gpio_chip *gc, unsigned offset)
{
return sh_gpio_get_value(gpio_to_pfc(gc), offset);
}
static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
{
sh_gpio_set_value(gpio_to_pfc(gc), offset, value);
}
static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct sh_pfc *pfc = gpio_to_pfc(gc);
pinmux_enum_t enum_id;
pinmux_enum_t *enum_ids;
int i, k, pos;
pos = 0;
enum_id = 0;
while (1) {
pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id);
if (pos <= 0 || !enum_id)
break;
for (i = 0; i < pfc->gpio_irq_size; i++) {
enum_ids = pfc->gpio_irq[i].enum_ids;
for (k = 0; enum_ids[k]; k++) {
if (enum_ids[k] == enum_id)
return pfc->gpio_irq[i].irq;
}
}
}
return -ENOSYS;
}
static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip)
{
struct sh_pfc *pfc = chip->pfc;
struct gpio_chip *gc = &chip->gpio_chip;
gc->request = sh_gpio_request;
gc->free = sh_gpio_free;
gc->direction_input = sh_gpio_direction_input;
gc->get = sh_gpio_get;
gc->direction_output = sh_gpio_direction_output;
gc->set = sh_gpio_set;
gc->to_irq = sh_gpio_to_irq;
WARN_ON(pfc->first_gpio != 0); /* needs testing */
gc->label = pfc->name;
gc->owner = THIS_MODULE;
gc->base = pfc->first_gpio;
gc->ngpio = (pfc->last_gpio - pfc->first_gpio) + 1;
}
int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
{
struct sh_pfc_chip *chip;
int ret;
chip = kzalloc(sizeof(struct sh_pfc_chip), GFP_KERNEL);
if (unlikely(!chip))
return -ENOMEM;
chip->pfc = pfc;
sh_pfc_gpio_setup(chip);
ret = gpiochip_add(&chip->gpio_chip);
if (unlikely(ret < 0))
kfree(chip);
pr_info("%s handling gpio %d -> %d\n",
pfc->name, pfc->first_gpio, pfc->last_gpio);
return ret;
}
EXPORT_SYMBOL_GPL(sh_pfc_register_gpiochip);
static int sh_pfc_gpio_match(struct gpio_chip *gc, void *data)
{
return !!strstr(gc->label, data);
}
static int __devinit sh_pfc_gpio_probe(struct platform_device *pdev)
{
struct sh_pfc_chip *chip;
struct gpio_chip *gc;
gc = gpiochip_find("_pfc", sh_pfc_gpio_match);
if (unlikely(!gc)) {
pr_err("Cant find gpio chip\n");
return -ENODEV;
}
chip = gpio_to_pfc_chip(gc);
platform_set_drvdata(pdev, chip);
pr_info("attaching to GPIO chip %s\n", chip->pfc->name);
return 0;
}
static int __devexit sh_pfc_gpio_remove(struct platform_device *pdev)
{
struct sh_pfc_chip *chip = platform_get_drvdata(pdev);
int ret;
ret = gpiochip_remove(&chip->gpio_chip);
if (unlikely(ret < 0))
return ret;
kfree(chip);
return 0;
}
static struct platform_driver sh_pfc_gpio_driver = {
.probe = sh_pfc_gpio_probe,
.remove = __devexit_p(sh_pfc_gpio_remove),
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
},
};
static struct platform_device sh_pfc_gpio_device = {
.name = KBUILD_MODNAME,
.id = -1,
};
static int __init sh_pfc_gpio_init(void)
{
int rc;
rc = platform_driver_register(&sh_pfc_gpio_driver);
if (likely(!rc)) {
rc = platform_device_register(&sh_pfc_gpio_device);
if (unlikely(rc))
platform_driver_unregister(&sh_pfc_gpio_driver);
}
return rc;
}
static void __exit sh_pfc_gpio_exit(void)
{
platform_device_unregister(&sh_pfc_gpio_device);
platform_driver_unregister(&sh_pfc_gpio_driver);
}
module_init(sh_pfc_gpio_init);
module_exit(sh_pfc_gpio_exit);
MODULE_AUTHOR("Magnus Damm, Paul Mundt");
MODULE_DESCRIPTION("GPIO driver for SuperH pin function controller");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:pfc-gpio");
include/linux/sh_pfc.h
View file @ a18d7f96
......@@ -16,17 +16,18 @@
typedef unsigned short pinmux_enum_t;
typedef unsigned short pinmux_flag_t;
#define PINMUX_TYPE_NONE 0
#define PINMUX_TYPE_FUNCTION 1
#define PINMUX_TYPE_GPIO 2
#define PINMUX_TYPE_OUTPUT 3
#define PINMUX_TYPE_INPUT 4
#define PINMUX_TYPE_INPUT_PULLUP 5
#define PINMUX_TYPE_INPUT_PULLDOWN 6
#define PINMUX_FLAG_TYPE (0x7)
#define PINMUX_FLAG_WANT_PULLUP (1 << 3)
#define PINMUX_FLAG_WANT_PULLDOWN (1 << 4)
enum {
PINMUX_TYPE_NONE,
PINMUX_TYPE_FUNCTION,
PINMUX_TYPE_GPIO,
PINMUX_TYPE_OUTPUT,
PINMUX_TYPE_INPUT,
PINMUX_TYPE_INPUT_PULLUP,
PINMUX_TYPE_INPUT_PULLDOWN,
PINMUX_FLAG_TYPE, /* must be last */
};
#define PINMUX_FLAG_DBIT_SHIFT 5
#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT)
......@@ -38,7 +39,9 @@ struct pinmux_gpio {
pinmux_flag_t flags;
};
#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark }
#define PINMUX_GPIO(gpio, data_or_mark) \
[gpio] = { .enum_id = data_or_mark, .flags = PINMUX_TYPE_NONE }
#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0
struct pinmux_cfg_reg {
......@@ -89,7 +92,7 @@ struct pfc_window {
unsigned long size;
};
struct pinmux_info {
struct sh_pfc {
char *name;
pinmux_enum_t reserved_id;
struct pinmux_range data;
......@@ -112,17 +115,44 @@ struct pinmux_info {
struct pinmux_irq *gpio_irq;
unsigned int gpio_irq_size;
spinlock_t lock;
struct resource *resource;
unsigned int num_resources;
struct pfc_window *window;
unsigned long unlock_reg;
struct gpio_chip chip;
};
int register_pinmux(struct pinmux_info *pip);
int unregister_pinmux(struct pinmux_info *pip);
/* XXX compat for now */
#define pinmux_info sh_pfc
/* drivers/sh/pfc/gpio.c */
int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
/* drivers/sh/pfc/core.c */
int register_sh_pfc(struct sh_pfc *pfc);
int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos);
void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
unsigned long value);
int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
struct pinmux_data_reg **drp, int *bitp);
int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
pinmux_enum_t *enum_idp);
int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
int cfg_mode);
int sh_pfc_set_direction(struct sh_pfc *pfc, unsigned gpio,
int new_pinmux_type);
/* xxx */
static inline int register_pinmux(struct pinmux_info *pip)
{
struct sh_pfc *pfc = pip;
return register_sh_pfc(pfc);
}
enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE };
/* helper macro for port */
#define PORT_1(fn, pfx, sfx) fn(pfx, sfx)
......
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