Commit a18d7f96 authored by Paul Mundt's avatar Paul Mundt

Merge branch 'common/pfc' into common/pinctrl

parents 2437fccf afae021a
menu "SuperH / SH-Mobile Driver Options"
source "drivers/sh/intc/Kconfig"
source "drivers/sh/pfc/Kconfig"
endmenu
......@@ -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-$(CONFIG_GENERIC_GPIO) += pfc.o
obj-y += pm_runtime.o
comment "Pin function controller options"
config SH_PFC
# XXX move off the gpio dependency
depends on GENERIC_GPIO
select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
def_bool y
config GPIO_SH_PFC
tristate "SuperH PFC GPIO support"
depends on SH_PFC && GPIOLIB
help
This enables support for GPIOs within the SoC's pin function
controller.
obj-y += core.o
obj-$(CONFIG_GPIO_SH_PFC) += gpio.o
This diff is collapsed.
/*
* 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");
......@@ -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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