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OF: pinctrl: MIPS: lantiq: implement lantiq/xway pinctrl support 

Implement support for pinctrl on lantiq/xway socs. The IO core found on these
socs has the registers for pinctrl, pinconf and gpio mixed up in the same
register range. As the gpio_chip handling is only a few lines, the driver also
implements the gpio functionality. This obseletes the old gpio driver that was
located in the arch/ folder.

Signed-off-by: John Crispin <blogic@openwrt.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
John Crispin 2012-08-28 12:44:59 +02:00
Родитель 30404aec4d
Коммит 3f8c50c9b1
9 изменённых файлов: 1334 добавлений и 184 удалений
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2
arch/mips/Kconfig
Просмотреть файл

@ -241,6 +241,8 @@ config LANTIQ
select HAVE_MACH_CLKDEV
select CLKDEV_LOOKUP
select USE_OF
select PINCTRL
select PINCTRL_LANTIQ
config LASAT
bool "LASAT Networks platforms"

1
arch/mips/lantiq/Kconfig
Просмотреть файл

@ -2,6 +2,7 @@ if LANTIQ
config SOC_TYPE_XWAY
bool
select PINCTRL_XWAY
default n
choice

2
arch/mips/lantiq/xway/Makefile
Просмотреть файл

@ -1 +1 @@
obj-y := prom.o sysctrl.o clk.o reset.o gpio.o dma.o gptu.o
obj-y := prom.o sysctrl.o clk.o reset.o dma.o gptu.o

183
arch/mips/lantiq/xway/gpio.c
Просмотреть файл

@ -1,183 +0,0 @@
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
* Copyright (C) 2010 John Crispin <blogic@openwrt.org>
*/
#include <linux/slab.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <lantiq_soc.h>
#define LTQ_GPIO_OUT 0x00
#define LTQ_GPIO_IN 0x04
#define LTQ_GPIO_DIR 0x08
#define LTQ_GPIO_ALTSEL0 0x0C
#define LTQ_GPIO_ALTSEL1 0x10
#define LTQ_GPIO_OD 0x14
#define PINS_PER_PORT 16
#define MAX_PORTS 3
#define ltq_gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & (1 << p)))
#define ltq_gpio_setbit(m, r, p) ltq_w32_mask(0, (1 << p), m + r)
#define ltq_gpio_clearbit(m, r, p) ltq_w32_mask((1 << p), 0, m + r)
struct ltq_gpio {
void __iomem *membase;
struct gpio_chip chip;
};
static struct ltq_gpio ltq_gpio_port[MAX_PORTS];
int ltq_gpio_request(unsigned int pin, unsigned int alt0,
unsigned int alt1, unsigned int dir, const char *name)
{
int id = 0;
if (pin >= (MAX_PORTS * PINS_PER_PORT))
return -EINVAL;
if (gpio_request(pin, name)) {
pr_err("failed to setup lantiq gpio: %s\n", name);
return -EBUSY;
}
if (dir)
gpio_direction_output(pin, 1);
else
gpio_direction_input(pin);
while (pin >= PINS_PER_PORT) {
pin -= PINS_PER_PORT;
id++;
}
if (alt0)
ltq_gpio_setbit(ltq_gpio_port[id].membase,
LTQ_GPIO_ALTSEL0, pin);
else
ltq_gpio_clearbit(ltq_gpio_port[id].membase,
LTQ_GPIO_ALTSEL0, pin);
if (alt1)
ltq_gpio_setbit(ltq_gpio_port[id].membase,
LTQ_GPIO_ALTSEL1, pin);
else
ltq_gpio_clearbit(ltq_gpio_port[id].membase,
LTQ_GPIO_ALTSEL1, pin);
return 0;
}
EXPORT_SYMBOL(ltq_gpio_request);
static void ltq_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip);
if (value)
ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OUT, offset);
else
ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OUT, offset);
}
static int ltq_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip);
return ltq_gpio_getbit(ltq_gpio->membase, LTQ_GPIO_IN, offset);
}
static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
{
struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip);
ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
return 0;
}
static int ltq_gpio_direction_output(struct gpio_chip *chip,
unsigned int offset, int value)
{
struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip);
ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
ltq_gpio_set(chip, offset, value);
return 0;
}
static int ltq_gpio_req(struct gpio_chip *chip, unsigned offset)
{
struct ltq_gpio *ltq_gpio = container_of(chip, struct ltq_gpio, chip);
ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL0, offset);
ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_ALTSEL1, offset);
return 0;
}
static int ltq_gpio_probe(struct platform_device *pdev)
{
struct resource *res;
if (pdev->id >= MAX_PORTS) {
dev_err(&pdev->dev, "invalid gpio port %d\n",
pdev->id);
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get memory for gpio port %d\n",
pdev->id);
return -ENOENT;
}
res = devm_request_mem_region(&pdev->dev, res->start,
resource_size(res), dev_name(&pdev->dev));
if (!res) {
dev_err(&pdev->dev,
"failed to request memory for gpio port %d\n",
pdev->id);
return -EBUSY;
}
ltq_gpio_port[pdev->id].membase = devm_ioremap_nocache(&pdev->dev,
res->start, resource_size(res));
if (!ltq_gpio_port[pdev->id].membase) {
dev_err(&pdev->dev, "failed to remap memory for gpio port %d\n",
pdev->id);
return -ENOMEM;
}
ltq_gpio_port[pdev->id].chip.label = "ltq_gpio";
ltq_gpio_port[pdev->id].chip.direction_input = ltq_gpio_direction_input;
ltq_gpio_port[pdev->id].chip.direction_output =
ltq_gpio_direction_output;
ltq_gpio_port[pdev->id].chip.get = ltq_gpio_get;
ltq_gpio_port[pdev->id].chip.set = ltq_gpio_set;
ltq_gpio_port[pdev->id].chip.request = ltq_gpio_req;
ltq_gpio_port[pdev->id].chip.base = PINS_PER_PORT * pdev->id;
ltq_gpio_port[pdev->id].chip.ngpio = PINS_PER_PORT;
platform_set_drvdata(pdev, &ltq_gpio_port[pdev->id]);
return gpiochip_add(&ltq_gpio_port[pdev->id].chip);
}
static struct platform_driver
ltq_gpio_driver = {
.probe = ltq_gpio_probe,
.driver = {
.name = "ltq_gpio",
.owner = THIS_MODULE,
},
};
int __init ltq_gpio_init(void)
{
int ret = platform_driver_register(&ltq_gpio_driver);
if (ret)
pr_info("ltq_gpio : Error registering platform driver!");
return ret;
}
postcore_initcall(ltq_gpio_init);

11
drivers/pinctrl/Kconfig
Просмотреть файл

@ -55,6 +55,12 @@ config PINCTRL_IMX6Q
help
Say Y here to enable the imx6q pinctrl driver
config PINCTRL_LANTIQ
bool
depends on LANTIQ
select PINMUX
select PINCONF
config PINCTRL_PXA3xx
bool
select PINMUX
@ -147,6 +153,11 @@ config PINCTRL_COH901
source "drivers/pinctrl/spear/Kconfig"
config PINCTRL_XWAY
bool
depends on SOC_TYPE_XWAY
depends on PINCTRL_LANTIQ
endmenu
endif

2
drivers/pinctrl/Makefile
Просмотреть файл

@ -29,5 +29,7 @@ obj-$(CONFIG_PINCTRL_TEGRA20) += pinctrl-tegra20.o
obj-$(CONFIG_PINCTRL_TEGRA30) += pinctrl-tegra30.o
obj-$(CONFIG_PINCTRL_U300) += pinctrl-u300.o
obj-$(CONFIG_PINCTRL_COH901) += pinctrl-coh901.o
obj-$(CONFIG_PINCTRL_XWAY) += pinctrl-xway.o
obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o
obj-$(CONFIG_PLAT_SPEAR) += spear/

342
drivers/pinctrl/pinctrl-lantiq.c Normal file
Просмотреть файл

@ -0,0 +1,342 @@
/*
* linux/drivers/pinctrl/pinctrl-lantiq.c
* based on linux/drivers/pinctrl/pinctrl-pxa3xx.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* publishhed by the Free Software Foundation.
*
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include "pinctrl-lantiq.h"
static int ltq_get_group_count(struct pinctrl_dev *pctrldev)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
return info->num_grps;
}
static const char *ltq_get_group_name(struct pinctrl_dev *pctrldev,
unsigned selector)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
if (selector >= info->num_grps)
return NULL;
return info->grps[selector].name;
}
static int ltq_get_group_pins(struct pinctrl_dev *pctrldev,
unsigned selector,
const unsigned **pins,
unsigned *num_pins)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
if (selector >= info->num_grps)
return -EINVAL;
*pins = info->grps[selector].pins;
*num_pins = info->grps[selector].npins;
return 0;
}
void ltq_pinctrl_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
int i;
for (i = 0; i < num_maps; i++)
if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
kfree(map[i].data.configs.configs);
kfree(map);
}
static void ltq_pinctrl_pin_dbg_show(struct pinctrl_dev *pctldev,
struct seq_file *s,
unsigned offset)
{
seq_printf(s, " %s", dev_name(pctldev->dev));
}
static int ltq_pinctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
unsigned long configs[3];
unsigned num_configs = 0;
struct property *prop;
const char *group, *pin;
const char *function;
int ret, i;
ret = of_property_read_string(np, "lantiq,function", &function);
if (!ret) {
of_property_for_each_string(np, "lantiq,groups", prop, group) {
(*map)->type = PIN_MAP_TYPE_MUX_GROUP;
(*map)->name = function;
(*map)->data.mux.group = group;
(*map)->data.mux.function = function;
(*map)++;
}
if (of_find_property(np, "lantiq,pins", NULL))
dev_err(pctldev->dev,
"%s mixes pins and groups settings\n",
np->name);
return 0;
}
for (i = 0; i < info->num_params; i++) {
u32 val;
int ret = of_property_read_u32(np,
info->params[i].property, &val);
if (!ret)
configs[num_configs++] =
LTQ_PINCONF_PACK(info->params[i].param,
val);
}
if (!num_configs)
return -EINVAL;
of_property_for_each_string(np, "lantiq,pins", prop, pin) {
(*map)->data.configs.configs = kmemdup(configs,
num_configs * sizeof(unsigned long),
GFP_KERNEL);
(*map)->type = PIN_MAP_TYPE_CONFIGS_PIN;
(*map)->name = pin;
(*map)->data.configs.group_or_pin = pin;
(*map)->data.configs.num_configs = num_configs;
(*map)++;
}
return 0;
}
static int ltq_pinctrl_dt_subnode_size(struct device_node *np)
{
int ret;
ret = of_property_count_strings(np, "lantiq,groups");
if (ret < 0)
ret = of_property_count_strings(np, "lantiq,pins");
return ret;
}
int ltq_pinctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map,
unsigned *num_maps)
{
struct pinctrl_map *tmp;
struct device_node *np;
int ret;
*num_maps = 0;
for_each_child_of_node(np_config, np)
*num_maps += ltq_pinctrl_dt_subnode_size(np);
*map = kzalloc(*num_maps * sizeof(struct pinctrl_map), GFP_KERNEL);
if (!*map)
return -ENOMEM;
tmp = *map;
for_each_child_of_node(np_config, np) {
ret = ltq_pinctrl_dt_subnode_to_map(pctldev, np, &tmp);
if (ret < 0) {
ltq_pinctrl_dt_free_map(pctldev, *map, *num_maps);
return ret;
}
}
return 0;
}
static struct pinctrl_ops ltq_pctrl_ops = {
.get_groups_count = ltq_get_group_count,
.get_group_name = ltq_get_group_name,
.get_group_pins = ltq_get_group_pins,
.pin_dbg_show = ltq_pinctrl_pin_dbg_show,
.dt_node_to_map = ltq_pinctrl_dt_node_to_map,
.dt_free_map = ltq_pinctrl_dt_free_map,
};
static int ltq_pmx_func_count(struct pinctrl_dev *pctrldev)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
return info->num_funcs;
}
static const char *ltq_pmx_func_name(struct pinctrl_dev *pctrldev,
unsigned selector)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
if (selector >= info->num_funcs)
return NULL;
return info->funcs[selector].name;
}
static int ltq_pmx_get_groups(struct pinctrl_dev *pctrldev,
unsigned func,
const char * const **groups,
unsigned * const num_groups)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
*groups = info->funcs[func].groups;
*num_groups = info->funcs[func].num_groups;
return 0;
}
/* Return function number. If failure, return negative value. */
static int match_mux(const struct ltq_mfp_pin *mfp, unsigned mux)
{
int i;
for (i = 0; i < LTQ_MAX_MUX; i++) {
if (mfp->func[i] == mux)
break;
}
if (i >= LTQ_MAX_MUX)
return -EINVAL;
return i;
}
/* dont assume .mfp is linearly mapped. find the mfp with the correct .pin */
static int match_mfp(const struct ltq_pinmux_info *info, int pin)
{
int i;
for (i = 0; i < info->num_mfp; i++) {
if (info->mfp[i].pin == pin)
return i;
}
return -1;
}
/* check whether current pin configuration is valid. Negative for failure */
static int match_group_mux(const struct ltq_pin_group *grp,
const struct ltq_pinmux_info *info,
unsigned mux)
{
int i, pin, ret = 0;
for (i = 0; i < grp->npins; i++) {
pin = match_mfp(info, grp->pins[i]);
if (pin < 0) {
dev_err(info->dev, "could not find mfp for pin %d\n",
grp->pins[i]);
return -EINVAL;
}
ret = match_mux(&info->mfp[pin], mux);
if (ret < 0) {
dev_err(info->dev, "Can't find mux %d on pin%d\n",
mux, pin);
break;
}
}
return ret;
}
static int ltq_pmx_enable(struct pinctrl_dev *pctrldev,
unsigned func,
unsigned group)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
const struct ltq_pin_group *pin_grp = &info->grps[group];
int i, pin, pin_func, ret;
if (!pin_grp->npins ||
(match_group_mux(pin_grp, info, pin_grp->mux) < 0)) {
dev_err(info->dev, "Failed to set the pin group: %s\n",
info->grps[group].name);
return -EINVAL;
}
for (i = 0; i < pin_grp->npins; i++) {
pin = match_mfp(info, pin_grp->pins[i]);
if (pin < 0) {
dev_err(info->dev, "could not find mfp for pin %d\n",
pin_grp->pins[i]);
return -EINVAL;
}
pin_func = match_mux(&info->mfp[pin], pin_grp->mux);
ret = info->apply_mux(pctrldev, pin, pin_func);
if (ret) {
dev_err(info->dev,
"failed to apply mux %d for pin %d\n",
pin_func, pin);
return ret;
}
}
return 0;
}
static void ltq_pmx_disable(struct pinctrl_dev *pctrldev,
unsigned func,
unsigned group)
{
/*
* Nothing to do here. However, pinconf_check_ops() requires this
* callback to be defined.
*/
}
static int ltq_pmx_gpio_request_enable(struct pinctrl_dev *pctrldev,
struct pinctrl_gpio_range *range,
unsigned pin)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
int mfp = match_mfp(info, pin + (range->id * 32));
int pin_func;
if (mfp < 0) {
dev_err(info->dev, "could not find mfp for pin %d\n", pin);
return -EINVAL;
}
pin_func = match_mux(&info->mfp[mfp], 0);
if (pin_func < 0) {
dev_err(info->dev, "No GPIO function on pin%d\n", mfp);
return -EINVAL;
}
return info->apply_mux(pctrldev, mfp, pin_func);
}
static struct pinmux_ops ltq_pmx_ops = {
.get_functions_count = ltq_pmx_func_count,
.get_function_name = ltq_pmx_func_name,
.get_function_groups = ltq_pmx_get_groups,
.enable = ltq_pmx_enable,
.disable = ltq_pmx_disable,
.gpio_request_enable = ltq_pmx_gpio_request_enable,
};
/*
* allow different socs to register with the generic part of the lanti
* pinctrl code
*/
int ltq_pinctrl_register(struct platform_device *pdev,
struct ltq_pinmux_info *info)
{
struct pinctrl_desc *desc;
if (!info)
return -EINVAL;
desc = info->desc;
desc->pctlops = &ltq_pctrl_ops;
desc->pmxops = &ltq_pmx_ops;
info->dev = &pdev->dev;
info->pctrl = pinctrl_register(desc, &pdev->dev, info);
if (!info->pctrl) {
dev_err(&pdev->dev, "failed to register LTQ pinmux driver\n");
return -EINVAL;
}
platform_set_drvdata(pdev, info);
return 0;
}

194
drivers/pinctrl/pinctrl-lantiq.h Normal file
Просмотреть файл

@ -0,0 +1,194 @@
/*
* linux/drivers/pinctrl/pinctrl-lantiq.h
* based on linux/drivers/pinctrl/pinctrl-pxa3xx.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* publishhed by the Free Software Foundation.
*
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#ifndef __PINCTRL_LANTIQ_H
#include <linux/clkdev.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include "core.h"
#define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x)
#define LTQ_MAX_MUX 4
#define MFPR_FUNC_MASK 0x3
#define LTQ_PINCONF_PACK(param, arg) ((param) << 16 | (arg))
#define LTQ_PINCONF_UNPACK_PARAM(conf) ((conf) >> 16)
#define LTQ_PINCONF_UNPACK_ARG(conf) ((conf) & 0xffff)
enum ltq_pinconf_param {
LTQ_PINCONF_PARAM_PULL,
LTQ_PINCONF_PARAM_OPEN_DRAIN,
LTQ_PINCONF_PARAM_DRIVE_CURRENT,
LTQ_PINCONF_PARAM_SLEW_RATE,
};
struct ltq_cfg_param {
const char *property;
enum ltq_pinconf_param param;
};
struct ltq_mfp_pin {
const char *name;
const unsigned int pin;
const unsigned short func[LTQ_MAX_MUX];
};
struct ltq_pin_group {
const char *name;
const unsigned mux;
const unsigned *pins;
const unsigned npins;
};
struct ltq_pmx_func {
const char *name;
const char * const *groups;
const unsigned num_groups;
};
struct ltq_pinmux_info {
struct device *dev;
struct pinctrl_dev *pctrl;
/* we need to manage up to 5 pad controllers */
void __iomem *membase[5];
/* the descriptor for the subsystem */
struct pinctrl_desc *desc;
/* we expose our pads to the subsystem */
struct pinctrl_pin_desc *pads;
/* the number of pads. this varies between socs */
unsigned int num_pads;
/* these are our multifunction pins */
const struct ltq_mfp_pin *mfp;
unsigned int num_mfp;
/* a number of multifunction pins can be grouped together */
const struct ltq_pin_group *grps;
unsigned int num_grps;
/* a mapping between function string and id */
const struct ltq_pmx_func *funcs;
unsigned int num_funcs;
/* the pinconf options that we are able to read from the DT */
const struct ltq_cfg_param *params;
unsigned int num_params;
/* the pad controller can have a irq mapping */
const unsigned *exin;
unsigned int num_exin;
/* we need 5 clocks max */
struct clk *clk[5];
/* soc specific callback used to apply muxing */
int (*apply_mux)(struct pinctrl_dev *pctrldev, int pin, int mux);
};
enum ltq_pin {
GPIO0 = 0,
GPIO1,
GPIO2,
GPIO3,
GPIO4,
GPIO5,
GPIO6,
GPIO7,
GPIO8,
GPIO9,
GPIO10, /* 10 */
GPIO11,
GPIO12,
GPIO13,
GPIO14,
GPIO15,
GPIO16,
GPIO17,
GPIO18,
GPIO19,
GPIO20, /* 20 */
GPIO21,
GPIO22,
GPIO23,
GPIO24,
GPIO25,
GPIO26,
GPIO27,
GPIO28,
GPIO29,
GPIO30, /* 30 */
GPIO31,
GPIO32,
GPIO33,
GPIO34,
GPIO35,
GPIO36,
GPIO37,
GPIO38,
GPIO39,
GPIO40, /* 40 */
GPIO41,
GPIO42,
GPIO43,
GPIO44,
GPIO45,
GPIO46,
GPIO47,
GPIO48,
GPIO49,
GPIO50, /* 50 */
GPIO51,
GPIO52,
GPIO53,
GPIO54,
GPIO55,
GPIO64,
GPIO65,
GPIO66,
GPIO67,
GPIO68,
GPIO69,
GPIO70,
GPIO71,
GPIO72,
GPIO73,
GPIO74,
GPIO75,
GPIO76,
GPIO77,
GPIO78,
GPIO79,
GPIO80,
GPIO81,
GPIO82,
GPIO83,
GPIO84,
GPIO85,
GPIO86,
GPIO87,
GPIO88,
};
extern int ltq_pinctrl_register(struct platform_device *pdev,
struct ltq_pinmux_info *info);
extern int ltq_pinctrl_unregister(struct platform_device *pdev);
#endif /* __PINCTRL_PXA3XX_H */

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drivers/pinctrl/pinctrl-xway.c Normal file
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/*
* linux/drivers/pinctrl/pinmux-xway.c
* based on linux/drivers/pinctrl/pinmux-pxa910.c
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* publishhed by the Free Software Foundation.
*
* Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_gpio.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/device.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include "pinctrl-lantiq.h"
#include <lantiq_soc.h>
/* we have 3 1/2 banks of 16 bit each */
#define PINS 16
#define PORT3 3
#define PORT(x) (x / PINS)
#define PORT_PIN(x) (x % PINS)
/* we have 2 mux bits that can be set for each pin */
#define MUX_ALT0 0x1
#define MUX_ALT1 0x2
/*
* each bank has this offset apart from the 1/2 bank that is mixed into the
* other 3 ranges
*/
#define REG_OFF 0x30
/* these are the offsets to our registers */
#define GPIO_BASE(p) (REG_OFF * PORT(p))
#define GPIO_OUT(p) GPIO_BASE(p)
#define GPIO_IN(p) (GPIO_BASE(p) + 0x04)
#define GPIO_DIR(p) (GPIO_BASE(p) + 0x08)
#define GPIO_ALT0(p) (GPIO_BASE(p) + 0x0C)
#define GPIO_ALT1(p) (GPIO_BASE(p) + 0x10)
#define GPIO_OD(p) (GPIO_BASE(p) + 0x14)
#define GPIO_PUDSEL(p) (GPIO_BASE(p) + 0x1c)
#define GPIO_PUDEN(p) (GPIO_BASE(p) + 0x20)
/* the 1/2 port needs special offsets for some registers */
#define GPIO3_OD (GPIO_BASE(0) + 0x24)
#define GPIO3_PUDSEL (GPIO_BASE(0) + 0x28)
#define GPIO3_PUDEN (GPIO_BASE(0) + 0x2C)
#define GPIO3_ALT1 (GPIO_BASE(PINS) + 0x24)
/* macros to help us access the registers */
#define gpio_getbit(m, r, p) (!!(ltq_r32(m + r) & BIT(p)))
#define gpio_setbit(m, r, p) ltq_w32_mask(0, BIT(p), m + r)
#define gpio_clearbit(m, r, p) ltq_w32_mask(BIT(p), 0, m + r)
#define MFP_XWAY(a, f0, f1, f2, f3) \
{ \
.name = #a, \
.pin = a, \
.func = { \
XWAY_MUX_##f0, \
XWAY_MUX_##f1, \
XWAY_MUX_##f2, \
XWAY_MUX_##f3, \
}, \
}
#define GRP_MUX(a, m, p) \
{ .name = a, .mux = XWAY_MUX_##m, .pins = p, .npins = ARRAY_SIZE(p), }
#define FUNC_MUX(f, m) \
{ .func = f, .mux = XWAY_MUX_##m, }
#define XWAY_MAX_PIN 32
#define XR9_MAX_PIN 56
enum xway_mux {
XWAY_MUX_GPIO = 0,
XWAY_MUX_SPI,
XWAY_MUX_ASC,
XWAY_MUX_PCI,
XWAY_MUX_CGU,
XWAY_MUX_EBU,
XWAY_MUX_JTAG,
XWAY_MUX_EXIN,
XWAY_MUX_TDM,
XWAY_MUX_STP,
XWAY_MUX_SIN,
XWAY_MUX_GPT,
XWAY_MUX_NMI,
XWAY_MUX_MDIO,
XWAY_MUX_MII,
XWAY_MUX_EPHY,
XWAY_MUX_DFE,
XWAY_MUX_SDIO,
XWAY_MUX_NONE = 0xffff,
};
static const struct ltq_mfp_pin xway_mfp[] = {
/* pin f0 f1 f2 f3 */
MFP_XWAY(GPIO0, GPIO, EXIN, NONE, TDM),
MFP_XWAY(GPIO1, GPIO, EXIN, NONE, NONE),
MFP_XWAY(GPIO2, GPIO, CGU, EXIN, NONE),
MFP_XWAY(GPIO3, GPIO, CGU, NONE, PCI),
MFP_XWAY(GPIO4, GPIO, STP, NONE, ASC),
MFP_XWAY(GPIO5, GPIO, STP, NONE, NONE),
MFP_XWAY(GPIO6, GPIO, STP, GPT, ASC),
MFP_XWAY(GPIO7, GPIO, CGU, PCI, NONE),
MFP_XWAY(GPIO8, GPIO, CGU, NMI, NONE),
MFP_XWAY(GPIO9, GPIO, ASC, SPI, EXIN),
MFP_XWAY(GPIO10, GPIO, ASC, SPI, NONE),
MFP_XWAY(GPIO11, GPIO, ASC, PCI, SPI),
MFP_XWAY(GPIO12, GPIO, ASC, NONE, NONE),
MFP_XWAY(GPIO13, GPIO, EBU, SPI, NONE),
MFP_XWAY(GPIO14, GPIO, CGU, PCI, NONE),
MFP_XWAY(GPIO15, GPIO, SPI, JTAG, NONE),
MFP_XWAY(GPIO16, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO17, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO18, GPIO, SPI, NONE, JTAG),
MFP_XWAY(GPIO19, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO20, GPIO, JTAG, NONE, NONE),
MFP_XWAY(GPIO21, GPIO, PCI, EBU, GPT),
MFP_XWAY(GPIO22, GPIO, SPI, NONE, NONE),
MFP_XWAY(GPIO23, GPIO, EBU, PCI, STP),
MFP_XWAY(GPIO24, GPIO, EBU, TDM, PCI),
MFP_XWAY(GPIO25, GPIO, TDM, NONE, ASC),
MFP_XWAY(GPIO26, GPIO, EBU, NONE, TDM),
MFP_XWAY(GPIO27, GPIO, TDM, NONE, ASC),
MFP_XWAY(GPIO28, GPIO, GPT, NONE, NONE),
MFP_XWAY(GPIO29, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO30, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO31, GPIO, EBU, PCI, NONE),
MFP_XWAY(GPIO32, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO33, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO34, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO35, GPIO, NONE, NONE, EBU),
MFP_XWAY(GPIO36, GPIO, SIN, NONE, EBU),
MFP_XWAY(GPIO37, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO38, GPIO, PCI, NONE, NONE),
MFP_XWAY(GPIO39, GPIO, EXIN, NONE, NONE),
MFP_XWAY(GPIO40, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO41, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO42, GPIO, MDIO, NONE, NONE),
MFP_XWAY(GPIO43, GPIO, MDIO, NONE, NONE),
MFP_XWAY(GPIO44, GPIO, NONE, NONE, SIN),
MFP_XWAY(GPIO45, GPIO, NONE, NONE, SIN),
MFP_XWAY(GPIO46, GPIO, NONE, NONE, EXIN),
MFP_XWAY(GPIO47, GPIO, NONE, NONE, SIN),
MFP_XWAY(GPIO48, GPIO, EBU, NONE, NONE),
MFP_XWAY(GPIO49, GPIO, EBU, NONE, NONE),
MFP_XWAY(GPIO50, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO51, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO52, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO53, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO54, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO55, GPIO, NONE, NONE, NONE),
};
static const struct ltq_mfp_pin ase_mfp[] = {
/* pin f0 f1 f2 f3 */
MFP_XWAY(GPIO0, GPIO, EXIN, MII, TDM),
MFP_XWAY(GPIO1, GPIO, STP, DFE, EBU),
MFP_XWAY(GPIO2, GPIO, STP, DFE, EPHY),
MFP_XWAY(GPIO3, GPIO, STP, EPHY, EBU),
MFP_XWAY(GPIO4, GPIO, GPT, EPHY, MII),
MFP_XWAY(GPIO5, GPIO, MII, ASC, GPT),
MFP_XWAY(GPIO6, GPIO, MII, ASC, EXIN),
MFP_XWAY(GPIO7, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO8, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO9, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO10, GPIO, SPI, MII, JTAG),
MFP_XWAY(GPIO11, GPIO, EBU, CGU, JTAG),
MFP_XWAY(GPIO12, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO13, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO14, GPIO, EBU, SPI, CGU),
MFP_XWAY(GPIO15, GPIO, EBU, SPI, SDIO),
MFP_XWAY(GPIO16, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO17, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO18, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO19, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO20, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO21, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO22, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO23, GPIO, EBU, MII, CGU),
MFP_XWAY(GPIO24, GPIO, EBU, NONE, MII),
MFP_XWAY(GPIO25, GPIO, EBU, MII, GPT),
MFP_XWAY(GPIO26, GPIO, EBU, MII, SDIO),
MFP_XWAY(GPIO27, GPIO, EBU, NONE, MII),
MFP_XWAY(GPIO28, GPIO, MII, EBU, SDIO),
MFP_XWAY(GPIO29, GPIO, EBU, MII, EXIN),
MFP_XWAY(GPIO30, GPIO, NONE, NONE, NONE),
MFP_XWAY(GPIO31, GPIO, NONE, NONE, NONE),
};
static const unsigned pins_jtag[] = {GPIO15, GPIO16, GPIO17, GPIO19, GPIO35};
static const unsigned pins_asc0[] = {GPIO11, GPIO12};
static const unsigned pins_asc0_cts_rts[] = {GPIO9, GPIO10};
static const unsigned pins_stp[] = {GPIO4, GPIO5, GPIO6};
static const unsigned pins_nmi[] = {GPIO8};
static const unsigned pins_mdio[] = {GPIO42, GPIO43};
static const unsigned pins_ebu_a24[] = {GPIO13};
static const unsigned pins_ebu_clk[] = {GPIO21};
static const unsigned pins_ebu_cs1[] = {GPIO23};
static const unsigned pins_ebu_a23[] = {GPIO24};
static const unsigned pins_ebu_wait[] = {GPIO26};
static const unsigned pins_ebu_a25[] = {GPIO31};
static const unsigned pins_ebu_rdy[] = {GPIO48};
static const unsigned pins_ebu_rd[] = {GPIO49};
static const unsigned pins_nand_ale[] = {GPIO13};
static const unsigned pins_nand_cs1[] = {GPIO23};
static const unsigned pins_nand_cle[] = {GPIO24};
static const unsigned pins_nand_rdy[] = {GPIO48};
static const unsigned pins_nand_rd[] = {GPIO49};
static const unsigned pins_exin0[] = {GPIO0};
static const unsigned pins_exin1[] = {GPIO1};
static const unsigned pins_exin2[] = {GPIO2};
static const unsigned pins_exin3[] = {GPIO39};
static const unsigned pins_exin4[] = {GPIO46};
static const unsigned pins_exin5[] = {GPIO9};
static const unsigned pins_spi[] = {GPIO16, GPIO17, GPIO18};
static const unsigned pins_spi_cs1[] = {GPIO15};
static const unsigned pins_spi_cs2[] = {GPIO21};
static const unsigned pins_spi_cs3[] = {GPIO13};
static const unsigned pins_spi_cs4[] = {GPIO10};
static const unsigned pins_spi_cs5[] = {GPIO9};
static const unsigned pins_spi_cs6[] = {GPIO11};
static const unsigned pins_gpt1[] = {GPIO28};
static const unsigned pins_gpt2[] = {GPIO21};
static const unsigned pins_gpt3[] = {GPIO6};
static const unsigned pins_clkout0[] = {GPIO8};
static const unsigned pins_clkout1[] = {GPIO7};
static const unsigned pins_clkout2[] = {GPIO3};
static const unsigned pins_clkout3[] = {GPIO2};
static const unsigned pins_pci_gnt1[] = {GPIO30};
static const unsigned pins_pci_gnt2[] = {GPIO23};
static const unsigned pins_pci_gnt3[] = {GPIO19};
static const unsigned pins_pci_gnt4[] = {GPIO38};
static const unsigned pins_pci_req1[] = {GPIO29};
static const unsigned pins_pci_req2[] = {GPIO31};
static const unsigned pins_pci_req3[] = {GPIO3};
static const unsigned pins_pci_req4[] = {GPIO37};
static const unsigned ase_pins_jtag[] = {GPIO7, GPIO8, GPIO9, GPIO10, GPIO11};
static const unsigned ase_pins_asc[] = {GPIO5, GPIO6};
static const unsigned ase_pins_stp[] = {GPIO1, GPIO2, GPIO3};
static const unsigned ase_pins_ephy[] = {GPIO2, GPIO3, GPIO4};
static const unsigned ase_pins_dfe[] = {GPIO1, GPIO2};
static const unsigned ase_pins_spi[] = {GPIO8, GPIO9, GPIO10};
static const unsigned ase_pins_spi_cs1[] = {GPIO7};
static const unsigned ase_pins_spi_cs2[] = {GPIO15};
static const unsigned ase_pins_spi_cs3[] = {GPIO14};
static const unsigned ase_pins_exin0[] = {GPIO6};
static const unsigned ase_pins_exin1[] = {GPIO29};
static const unsigned ase_pins_exin2[] = {GPIO0};
static const unsigned ase_pins_gpt1[] = {GPIO5};
static const unsigned ase_pins_gpt2[] = {GPIO4};
static const unsigned ase_pins_gpt3[] = {GPIO25};
static const struct ltq_pin_group xway_grps[] = {
GRP_MUX("exin0", EXIN, pins_exin0),
GRP_MUX("exin1", EXIN, pins_exin1),
GRP_MUX("exin2", EXIN, pins_exin2),
GRP_MUX("jtag", JTAG, pins_jtag),
GRP_MUX("ebu a23", EBU, pins_ebu_a23),
GRP_MUX("ebu a24", EBU, pins_ebu_a24),
GRP_MUX("ebu a25", EBU, pins_ebu_a25),
GRP_MUX("ebu clk", EBU, pins_ebu_clk),
GRP_MUX("ebu cs1", EBU, pins_ebu_cs1),
GRP_MUX("ebu wait", EBU, pins_ebu_wait),
GRP_MUX("nand ale", EBU, pins_nand_ale),
GRP_MUX("nand cs1", EBU, pins_nand_cs1),
GRP_MUX("nand cle", EBU, pins_nand_cle),
GRP_MUX("spi", SPI, pins_spi),
GRP_MUX("spi_cs1", SPI, pins_spi_cs1),
GRP_MUX("spi_cs2", SPI, pins_spi_cs2),
GRP_MUX("spi_cs3", SPI, pins_spi_cs3),
GRP_MUX("spi_cs4", SPI, pins_spi_cs4),
GRP_MUX("spi_cs5", SPI, pins_spi_cs5),
GRP_MUX("spi_cs6", SPI, pins_spi_cs6),
GRP_MUX("asc0", ASC, pins_asc0),
GRP_MUX("asc0 cts rts", ASC, pins_asc0_cts_rts),
GRP_MUX("stp", STP, pins_stp),
GRP_MUX("nmi", NMI, pins_nmi),
GRP_MUX("gpt1", GPT, pins_gpt1),
GRP_MUX("gpt2", GPT, pins_gpt2),
GRP_MUX("gpt3", GPT, pins_gpt3),
GRP_MUX("clkout0", CGU, pins_clkout0),
GRP_MUX("clkout1", CGU, pins_clkout1),
GRP_MUX("clkout2", CGU, pins_clkout2),
GRP_MUX("clkout3", CGU, pins_clkout3),
GRP_MUX("gnt1", PCI, pins_pci_gnt1),
GRP_MUX("gnt2", PCI, pins_pci_gnt2),
GRP_MUX("gnt3", PCI, pins_pci_gnt3),
GRP_MUX("req1", PCI, pins_pci_req1),
GRP_MUX("req2", PCI, pins_pci_req2),
GRP_MUX("req3", PCI, pins_pci_req3),
/* xrx only */
GRP_MUX("nand rdy", EBU, pins_nand_rdy),
GRP_MUX("nand rd", EBU, pins_nand_rd),
GRP_MUX("exin3", EXIN, pins_exin3),
GRP_MUX("exin4", EXIN, pins_exin4),
GRP_MUX("exin5", EXIN, pins_exin5),
GRP_MUX("gnt4", PCI, pins_pci_gnt4),
GRP_MUX("req4", PCI, pins_pci_gnt4),
GRP_MUX("mdio", MDIO, pins_mdio),
};
static const struct ltq_pin_group ase_grps[] = {
GRP_MUX("exin0", EXIN, ase_pins_exin0),
GRP_MUX("exin1", EXIN, ase_pins_exin1),
GRP_MUX("exin2", EXIN, ase_pins_exin2),
GRP_MUX("jtag", JTAG, ase_pins_jtag),
GRP_MUX("stp", STP, ase_pins_stp),
GRP_MUX("asc", ASC, ase_pins_asc),
GRP_MUX("gpt1", GPT, ase_pins_gpt1),
GRP_MUX("gpt2", GPT, ase_pins_gpt2),
GRP_MUX("gpt3", GPT, ase_pins_gpt3),
GRP_MUX("ephy", EPHY, ase_pins_ephy),
GRP_MUX("dfe", DFE, ase_pins_dfe),
GRP_MUX("spi", SPI, ase_pins_spi),
GRP_MUX("spi_cs1", SPI, ase_pins_spi_cs1),
GRP_MUX("spi_cs2", SPI, ase_pins_spi_cs2),
GRP_MUX("spi_cs3", SPI, ase_pins_spi_cs3),
};
static const char * const xway_pci_grps[] = {"gnt1", "gnt2",
"gnt3", "req1",
"req2", "req3"};
static const char * const xway_spi_grps[] = {"spi", "spi_cs1",
"spi_cs2", "spi_cs3",
"spi_cs4", "spi_cs5",
"spi_cs6"};
static const char * const xway_cgu_grps[] = {"clkout0", "clkout1",
"clkout2", "clkout3"};
static const char * const xway_ebu_grps[] = {"ebu a23", "ebu a24",
"ebu a25", "ebu cs1",
"ebu wait", "ebu clk",
"nand ale", "nand cs1",
"nand cle"};
static const char * const xway_exin_grps[] = {"exin0", "exin1", "exin2"};
static const char * const xway_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
static const char * const xway_asc_grps[] = {"asc0", "asc0 cts rts"};
static const char * const xway_jtag_grps[] = {"jtag"};
static const char * const xway_stp_grps[] = {"stp"};
static const char * const xway_nmi_grps[] = {"nmi"};
/* ar9/vr9/gr9 */
static const char * const xrx_mdio_grps[] = {"mdio"};
static const char * const xrx_ebu_grps[] = {"ebu a23", "ebu a24",
"ebu a25", "ebu cs1",
"ebu wait", "ebu clk",
"nand ale", "nand cs1",
"nand cle", "nand rdy",
"nand rd"};
static const char * const xrx_exin_grps[] = {"exin0", "exin1", "exin2",
"exin3", "exin4", "exin5"};
static const char * const xrx_pci_grps[] = {"gnt1", "gnt2",
"gnt3", "gnt4",
"req1", "req2",
"req3", "req4"};
/* ase */
static const char * const ase_exin_grps[] = {"exin0", "exin1", "exin2"};
static const char * const ase_gpt_grps[] = {"gpt1", "gpt2", "gpt3"};
static const char * const ase_dfe_grps[] = {"dfe"};
static const char * const ase_ephy_grps[] = {"ephy"};
static const char * const ase_asc_grps[] = {"asc"};
static const char * const ase_jtag_grps[] = {"jtag"};
static const char * const ase_stp_grps[] = {"stp"};
static const char * const ase_spi_grps[] = {"spi", "spi_cs1",
"spi_cs2", "spi_cs3"};
static const struct ltq_pmx_func danube_funcs[] = {
{"spi", ARRAY_AND_SIZE(xway_spi_grps)},
{"asc", ARRAY_AND_SIZE(xway_asc_grps)},
{"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
{"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
{"exin", ARRAY_AND_SIZE(xway_exin_grps)},
{"stp", ARRAY_AND_SIZE(xway_stp_grps)},
{"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
{"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
{"pci", ARRAY_AND_SIZE(xway_pci_grps)},
{"ebu", ARRAY_AND_SIZE(xway_ebu_grps)},
};
static const struct ltq_pmx_func xrx_funcs[] = {
{"spi", ARRAY_AND_SIZE(xway_spi_grps)},
{"asc", ARRAY_AND_SIZE(xway_asc_grps)},
{"cgu", ARRAY_AND_SIZE(xway_cgu_grps)},
{"jtag", ARRAY_AND_SIZE(xway_jtag_grps)},
{"exin", ARRAY_AND_SIZE(xrx_exin_grps)},
{"stp", ARRAY_AND_SIZE(xway_stp_grps)},
{"gpt", ARRAY_AND_SIZE(xway_gpt_grps)},
{"nmi", ARRAY_AND_SIZE(xway_nmi_grps)},
{"pci", ARRAY_AND_SIZE(xrx_pci_grps)},
{"ebu", ARRAY_AND_SIZE(xrx_ebu_grps)},
{"mdio", ARRAY_AND_SIZE(xrx_mdio_grps)},
};
static const struct ltq_pmx_func ase_funcs[] = {
{"spi", ARRAY_AND_SIZE(ase_spi_grps)},
{"asc", ARRAY_AND_SIZE(ase_asc_grps)},
{"jtag", ARRAY_AND_SIZE(ase_jtag_grps)},
{"exin", ARRAY_AND_SIZE(ase_exin_grps)},
{"stp", ARRAY_AND_SIZE(ase_stp_grps)},
{"gpt", ARRAY_AND_SIZE(ase_gpt_grps)},
{"ephy", ARRAY_AND_SIZE(ase_ephy_grps)},
{"dfe", ARRAY_AND_SIZE(ase_dfe_grps)},
};
/* --------- pinconf related code --------- */
static int xway_pinconf_get(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long *config)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(*config);
int port = PORT(pin);
u32 reg;
switch (param) {
case LTQ_PINCONF_PARAM_OPEN_DRAIN:
if (port == PORT3)
reg = GPIO3_OD;
else
reg = GPIO_OD(port);
*config = LTQ_PINCONF_PACK(param,
!!gpio_getbit(info->membase[0], reg, PORT_PIN(port)));
break;
case LTQ_PINCONF_PARAM_PULL:
if (port == PORT3)
reg = GPIO3_PUDEN;
else
reg = GPIO_PUDEN(port);
if (!gpio_getbit(info->membase[0], reg, PORT_PIN(port))) {
*config = LTQ_PINCONF_PACK(param, 0);
break;
}
if (port == PORT3)
reg = GPIO3_PUDSEL;
else
reg = GPIO_PUDSEL(port);
if (!gpio_getbit(info->membase[0], reg, PORT_PIN(port)))
*config = LTQ_PINCONF_PACK(param, 2);
else
*config = LTQ_PINCONF_PACK(param, 1);
break;
default:
dev_err(pctldev->dev, "Invalid config param %04x\n", param);
return -ENOTSUPP;
}
return 0;
}
static int xway_pinconf_set(struct pinctrl_dev *pctldev,
unsigned pin,
unsigned long config)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctldev);
enum ltq_pinconf_param param = LTQ_PINCONF_UNPACK_PARAM(config);
int arg = LTQ_PINCONF_UNPACK_ARG(config);
int port = PORT(pin);
u32 reg;
switch (param) {
case LTQ_PINCONF_PARAM_OPEN_DRAIN:
if (port == PORT3)
reg = GPIO3_OD;
else
reg = GPIO_OD(port);
gpio_setbit(info->membase[0], reg, PORT_PIN(port));
break;
case LTQ_PINCONF_PARAM_PULL:
if (port == PORT3)
reg = GPIO3_PUDEN;
else
reg = GPIO_PUDEN(port);
if (arg == 0) {
gpio_clearbit(info->membase[0], reg, PORT_PIN(port));
break;
}
gpio_setbit(info->membase[0], reg, PORT_PIN(port));
if (port == PORT3)
reg = GPIO3_PUDSEL;
else
reg = GPIO_PUDSEL(port);
if (arg == 1)
gpio_clearbit(info->membase[0], reg, PORT_PIN(port));
else if (arg == 2)
gpio_setbit(info->membase[0], reg, PORT_PIN(port));
else
dev_err(pctldev->dev, "Invalid pull value %d\n", arg);
break;
default:
dev_err(pctldev->dev, "Invalid config param %04x\n", param);
return -ENOTSUPP;
}
return 0;
}
struct pinconf_ops xway_pinconf_ops = {
.pin_config_get = xway_pinconf_get,
.pin_config_set = xway_pinconf_set,
};
static struct pinctrl_desc xway_pctrl_desc = {
.owner = THIS_MODULE,
.confops = &xway_pinconf_ops,
};
static inline int xway_mux_apply(struct pinctrl_dev *pctrldev,
int pin, int mux)
{
struct ltq_pinmux_info *info = pinctrl_dev_get_drvdata(pctrldev);
int port = PORT(pin);
u32 alt1_reg = GPIO_ALT1(pin);
if (port == PORT3)
alt1_reg = GPIO3_ALT1;
if (mux & MUX_ALT0)
gpio_setbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], GPIO_ALT0(pin), PORT_PIN(pin));
if (mux & MUX_ALT1)
gpio_setbit(info->membase[0], alt1_reg, PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], alt1_reg, PORT_PIN(pin));
return 0;
}
static const struct ltq_cfg_param xway_cfg_params[] = {
{"lantiq,pull", LTQ_PINCONF_PARAM_PULL},
{"lantiq,open-drain", LTQ_PINCONF_PARAM_OPEN_DRAIN},
};
static struct ltq_pinmux_info xway_info = {
.desc = &xway_pctrl_desc,
.apply_mux = xway_mux_apply,
.params = xway_cfg_params,
.num_params = ARRAY_SIZE(xway_cfg_params),
};
/* --------- gpio_chip related code --------- */
static void xway_gpio_set(struct gpio_chip *chip, unsigned int pin, int val)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
if (val)
gpio_setbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
else
gpio_clearbit(info->membase[0], GPIO_OUT(pin), PORT_PIN(pin));
}
static int xway_gpio_get(struct gpio_chip *chip, unsigned int pin)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
return gpio_getbit(info->membase[0], GPIO_IN(pin), PORT_PIN(pin));
}
static int xway_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
gpio_clearbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
return 0;
}
static int xway_gpio_dir_out(struct gpio_chip *chip, unsigned int pin, int val)
{
struct ltq_pinmux_info *info = dev_get_drvdata(chip->dev);
gpio_setbit(info->membase[0], GPIO_DIR(pin), PORT_PIN(pin));
xway_gpio_set(chip, pin, val);
return 0;
}
static int xway_gpio_req(struct gpio_chip *chip, unsigned offset)
{
int gpio = chip->base + offset;
return pinctrl_request_gpio(gpio);
}
static void xway_gpio_free(struct gpio_chip *chip, unsigned offset)
{
int gpio = chip->base + offset;
pinctrl_free_gpio(gpio);
}
static struct gpio_chip xway_chip = {
.label = "gpio-xway",
.direction_input = xway_gpio_dir_in,
.direction_output = xway_gpio_dir_out,
.get = xway_gpio_get,
.set = xway_gpio_set,
.request = xway_gpio_req,
.free = xway_gpio_free,
.base = -1,
};
/* --------- register the pinctrl layer --------- */
static const unsigned xway_exin_pin_map[] = {GPIO0, GPIO1, GPIO2, GPIO39, GPIO46, GPIO9};
static const unsigned ase_exin_pins_map[] = {GPIO6, GPIO29, GPIO0};
static struct pinctrl_xway_soc {
int pin_count;
const struct ltq_mfp_pin *mfp;
const struct ltq_pin_group *grps;
unsigned int num_grps;
const struct ltq_pmx_func *funcs;
unsigned int num_funcs;
const unsigned *exin;
unsigned int num_exin;
} soc_cfg[] = {
/* legacy xway */
{XWAY_MAX_PIN, xway_mfp,
xway_grps, ARRAY_SIZE(xway_grps),
danube_funcs, ARRAY_SIZE(danube_funcs),
xway_exin_pin_map, 3},
/* xway xr9 series */
{XR9_MAX_PIN, xway_mfp,
xway_grps, ARRAY_SIZE(xway_grps),
xrx_funcs, ARRAY_SIZE(xrx_funcs),
xway_exin_pin_map, 6},
/* xway ase series */
{XWAY_MAX_PIN, ase_mfp,
ase_grps, ARRAY_SIZE(ase_grps),
ase_funcs, ARRAY_SIZE(ase_funcs),
ase_exin_pins_map, 3},
};
static struct pinctrl_gpio_range xway_gpio_range = {
.name = "XWAY GPIO",
.gc = &xway_chip,
};
static const struct of_device_id xway_match[] = {
{ .compatible = "lantiq,pinctrl-xway", .data = &soc_cfg[0]},
{ .compatible = "lantiq,pinctrl-xr9", .data = &soc_cfg[1]},
{ .compatible = "lantiq,pinctrl-ase", .data = &soc_cfg[2]},
{},
};
MODULE_DEVICE_TABLE(of, xway_match);
static int __devinit pinmux_xway_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
const struct pinctrl_xway_soc *xway_soc;
struct resource *res;
int ret, i;
/* get and remap our register range */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Failed to get resource\n");
return -ENOENT;
}
xway_info.membase[0] = devm_request_and_ioremap(&pdev->dev, res);
if (!xway_info.membase[0]) {
dev_err(&pdev->dev, "Failed to remap resource\n");
return -ENOMEM;
}
match = of_match_device(xway_match, &pdev->dev);
if (match)
xway_soc = (const struct pinctrl_xway_soc *) match->data;
else
xway_soc = &soc_cfg[0];
/* find out how many pads we have */
xway_chip.ngpio = xway_soc->pin_count;
/* load our pad descriptors */
xway_info.pads = devm_kzalloc(&pdev->dev,
sizeof(struct pinctrl_pin_desc) * xway_chip.ngpio,
GFP_KERNEL);
if (!xway_info.pads) {
dev_err(&pdev->dev, "Failed to allocate pads\n");
return -ENOMEM;
}
for (i = 0; i < xway_chip.ngpio; i++) {
/* strlen("ioXY") + 1 = 5 */
char *name = devm_kzalloc(&pdev->dev, 5, GFP_KERNEL);
if (!name) {
dev_err(&pdev->dev, "Failed to allocate pad name\n");
return -ENOMEM;
}
snprintf(name, 5, "io%d", i);
xway_info.pads[i].number = GPIO0 + i;
xway_info.pads[i].name = name;
}
xway_pctrl_desc.pins = xway_info.pads;
/* load the gpio chip */
xway_chip.dev = &pdev->dev;
of_gpiochip_add(&xway_chip);
ret = gpiochip_add(&xway_chip);
if (ret) {
dev_err(&pdev->dev, "Failed to register gpio chip\n");
return ret;
}
/* setup the data needed by pinctrl */
xway_pctrl_desc.name = dev_name(&pdev->dev);
xway_pctrl_desc.npins = xway_chip.ngpio;
xway_info.num_pads = xway_chip.ngpio;
xway_info.num_mfp = xway_chip.ngpio;
xway_info.mfp = xway_soc->mfp;
xway_info.grps = xway_soc->grps;
xway_info.num_grps = xway_soc->num_grps;
xway_info.funcs = xway_soc->funcs;
xway_info.num_funcs = xway_soc->num_funcs;
xway_info.exin = xway_soc->exin;
xway_info.num_exin = xway_soc->num_exin;
/* register with the generic lantiq layer */
ret = ltq_pinctrl_register(pdev, &xway_info);
if (ret) {
dev_err(&pdev->dev, "Failed to register pinctrl driver\n");
return ret;
}
/* finish with registering the gpio range in pinctrl */
xway_gpio_range.npins = xway_chip.ngpio;
xway_gpio_range.base = xway_chip.base;
pinctrl_add_gpio_range(xway_info.pctrl, &xway_gpio_range);
dev_info(&pdev->dev, "Init done\n");
return 0;
}
static struct platform_driver pinmux_xway_driver = {
.probe = pinmux_xway_probe,
.driver = {
.name = "pinctrl-xway",
.owner = THIS_MODULE,
.of_match_table = xway_match,
},
};
static int __init pinmux_xway_init(void)
{
return platform_driver_register(&pinmux_xway_driver);
}
core_initcall_sync(pinmux_xway_init);