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|
/*
* mt65xx pinctrl driver based on Allwinner A1X pinctrl driver.
* Copyright (c) 2014 MediaTek Inc.
* Author: Hongzhou.Yang <hongzhou.yang@mediatek.com>
*
* 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.
*
* 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/io.h>
#include <linux/gpio/driver.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <dt-bindings/pinctrl/mt65xx.h>
#include "../core.h"
#include "../pinconf.h"
#include "../pinctrl-utils.h"
#include "mtk-eint.h"
#include "pinctrl-mtk-common.h"
#define MAX_GPIO_MODE_PER_REG 5
#define GPIO_MODE_BITS 3
#define GPIO_MODE_PREFIX "GPIO"
static const char * const mtk_gpio_functions[] = {
"func0", "func1", "func2", "func3",
"func4", "func5", "func6", "func7",
"func8", "func9", "func10", "func11",
"func12", "func13", "func14", "func15",
};
/*
* There are two base address for pull related configuration
* in mt8135, and different GPIO pins use different base address.
* When pin number greater than type1_start and less than type1_end,
* should use the second base address.
*/
static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl,
unsigned long pin)
{
if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end)
return pctl->regmap2;
return pctl->regmap1;
}
static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin)
{
/* Different SoC has different mask and port shift. */
return ((pin >> 4) & pctl->devdata->port_mask)
<< pctl->devdata->port_shf;
}
static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range, unsigned offset,
bool input)
{
unsigned int reg_addr;
unsigned int bit;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
bit = BIT(offset & 0xf);
if (pctl->devdata->spec_dir_set)
pctl->devdata->spec_dir_set(®_addr, offset);
if (input)
/* Different SoC has different alignment offset. */
reg_addr = CLR_ADDR(reg_addr, pctl);
else
reg_addr = SET_ADDR(reg_addr, pctl);
regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
return 0;
}
static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
unsigned int reg_addr;
unsigned int bit;
struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset;
bit = BIT(offset & 0xf);
if (value)
reg_addr = SET_ADDR(reg_addr, pctl);
else
reg_addr = CLR_ADDR(reg_addr, pctl);
regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit);
}
static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
int value, enum pin_config_param arg)
{
unsigned int reg_addr, offset;
unsigned int bit;
/**
* Due to some soc are not support ies/smt config, add this special
* control to handle it.
*/
if (!pctl->devdata->spec_ies_smt_set &&
pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT &&
arg == PIN_CONFIG_INPUT_ENABLE)
return -EINVAL;
if (!pctl->devdata->spec_ies_smt_set &&
pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT &&
arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE)
return -EINVAL;
/*
* Due to some pins are irregular, their input enable and smt
* control register are discontinuous, so we need this special handle.
*/
if (pctl->devdata->spec_ies_smt_set) {
return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
pin, pctl->devdata->port_align, value, arg);
}
bit = BIT(pin & 0xf);
if (arg == PIN_CONFIG_INPUT_ENABLE)
offset = pctl->devdata->ies_offset;
else
offset = pctl->devdata->smt_offset;
if (value)
reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
else
reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl);
regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit);
return 0;
}
int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap,
const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num,
unsigned int pin, unsigned char align, int value)
{
unsigned int i, reg_addr, bit;
for (i = 0; i < info_num; i++) {
if (pin >= ies_smt_infos[i].start &&
pin <= ies_smt_infos[i].end) {
break;
}
}
if (i == info_num)
return -EINVAL;
if (value)
reg_addr = ies_smt_infos[i].offset + align;
else
reg_addr = ies_smt_infos[i].offset + (align << 1);
bit = BIT(ies_smt_infos[i].bit);
regmap_write(regmap, reg_addr, bit);
return 0;
}
static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin(
struct mtk_pinctrl *pctl, unsigned long pin) {
int i;
for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) {
const struct mtk_pin_drv_grp *pin_drv =
pctl->devdata->pin_drv_grp + i;
if (pin == pin_drv->pin)
return pin_drv;
}
return NULL;
}
static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl,
unsigned int pin, unsigned char driving)
{
const struct mtk_pin_drv_grp *pin_drv;
unsigned int val;
unsigned int bits, mask, shift;
const struct mtk_drv_group_desc *drv_grp;
if (pin >= pctl->devdata->npins)
return -EINVAL;
pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin);
if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls)
return -EINVAL;
drv_grp = pctl->devdata->grp_desc + pin_drv->grp;
if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv
&& !(driving % drv_grp->step)) {
val = driving / drv_grp->step - 1;
bits = drv_grp->high_bit - drv_grp->low_bit + 1;
mask = BIT(bits) - 1;
shift = pin_drv->bit + drv_grp->low_bit;
mask <<= shift;
val <<= shift;
return regmap_update_bits(mtk_get_regmap(pctl, pin),
pin_drv->offset, mask, val);
}
return -EINVAL;
}
int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap,
const struct mtk_pin_spec_pupd_set_samereg *pupd_infos,
unsigned int info_num, unsigned int pin,
unsigned char align, bool isup, unsigned int r1r0)
{
unsigned int i;
unsigned int reg_pupd, reg_set, reg_rst;
unsigned int bit_pupd, bit_r0, bit_r1;
const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin;
bool find = false;
for (i = 0; i < info_num; i++) {
if (pin == pupd_infos[i].pin) {
find = true;
break;
}
}
if (!find)
return -EINVAL;
spec_pupd_pin = pupd_infos + i;
reg_set = spec_pupd_pin->offset + align;
reg_rst = spec_pupd_pin->offset + (align << 1);
if (isup)
reg_pupd = reg_rst;
else
reg_pupd = reg_set;
bit_pupd = BIT(spec_pupd_pin->pupd_bit);
regmap_write(regmap, reg_pupd, bit_pupd);
bit_r0 = BIT(spec_pupd_pin->r0_bit);
bit_r1 = BIT(spec_pupd_pin->r1_bit);
switch (r1r0) {
case MTK_PUPD_SET_R1R0_00:
regmap_write(regmap, reg_rst, bit_r0);
regmap_write(regmap, reg_rst, bit_r1);
break;
case MTK_PUPD_SET_R1R0_01:
regmap_write(regmap, reg_set, bit_r0);
regmap_write(regmap, reg_rst, bit_r1);
break;
case MTK_PUPD_SET_R1R0_10:
regmap_write(regmap, reg_rst, bit_r0);
regmap_write(regmap, reg_set, bit_r1);
break;
case MTK_PUPD_SET_R1R0_11:
regmap_write(regmap, reg_set, bit_r0);
regmap_write(regmap, reg_set, bit_r1);
break;
default:
return -EINVAL;
}
return 0;
}
static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl,
unsigned int pin, bool enable, bool isup, unsigned int arg)
{
unsigned int bit;
unsigned int reg_pullen, reg_pullsel, r1r0;
int ret;
/* Some pins' pull setting are very different,
* they have separate pull up/down bit, R0 and R1
* resistor bit, so we need this special handle.
*/
if (pctl->devdata->spec_pull_set) {
/* For special pins, bias-disable is set by R1R0,
* the parameter should be "MTK_PUPD_SET_R1R0_00".
*/
r1r0 = enable ? arg : MTK_PUPD_SET_R1R0_00;
ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
pin, pctl->devdata->port_align, isup, r1r0);
if (!ret)
return 0;
}
/* For generic pull config, default arg value should be 0 or 1. */
if (arg != 0 && arg != 1) {
dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n",
arg, pin);
return -EINVAL;
}
bit = BIT(pin & 0xf);
if (enable)
reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) +
pctl->devdata->pullen_offset, pctl);
else
reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) +
pctl->devdata->pullen_offset, pctl);
if (isup)
reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) +
pctl->devdata->pullsel_offset, pctl);
else
reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) +
pctl->devdata->pullsel_offset, pctl);
regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit);
regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit);
return 0;
}
static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev,
unsigned int pin, enum pin_config_param param,
enum pin_config_param arg)
{
int ret = 0;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg);
break;
case PIN_CONFIG_BIAS_PULL_UP:
ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
break;
case PIN_CONFIG_INPUT_ENABLE:
mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
break;
case PIN_CONFIG_OUTPUT:
mtk_gpio_set(pctl->chip, pin, arg);
ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
break;
case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true);
ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param);
break;
case PIN_CONFIG_DRIVE_STRENGTH:
ret = mtk_pconf_set_driving(pctl, pin, arg);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int mtk_pconf_group_get(struct pinctrl_dev *pctldev,
unsigned group,
unsigned long *config)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*config = pctl->groups[group].config;
return 0;
}
static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
unsigned long *configs, unsigned num_configs)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mtk_pinctrl_group *g = &pctl->groups[group];
int i, ret;
for (i = 0; i < num_configs; i++) {
ret = mtk_pconf_parse_conf(pctldev, g->pin,
pinconf_to_config_param(configs[i]),
pinconf_to_config_argument(configs[i]));
if (ret < 0)
return ret;
g->config = configs[i];
}
return 0;
}
static const struct pinconf_ops mtk_pconf_ops = {
.pin_config_group_get = mtk_pconf_group_get,
.pin_config_group_set = mtk_pconf_group_set,
};
static struct mtk_pinctrl_group *
mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin)
{
int i;
for (i = 0; i < pctl->ngroups; i++) {
struct mtk_pinctrl_group *grp = pctl->groups + i;
if (grp->pin == pin)
return grp;
}
return NULL;
}
static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin(
struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum)
{
const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num;
const struct mtk_desc_function *func = pin->functions;
while (func && func->name) {
if (func->muxval == fnum)
return func;
func++;
}
return NULL;
}
static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl,
u32 pin_num, u32 fnum)
{
int i;
for (i = 0; i < pctl->devdata->npins; i++) {
const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
if (pin->pin.number == pin_num) {
const struct mtk_desc_function *func =
pin->functions;
while (func && func->name) {
if (func->muxval == fnum)
return true;
func++;
}
break;
}
}
return false;
}
static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl,
u32 pin, u32 fnum, struct mtk_pinctrl_group *grp,
struct pinctrl_map **map, unsigned *reserved_maps,
unsigned *num_maps)
{
bool ret;
if (*num_maps == *reserved_maps)
return -ENOSPC;
(*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP;
(*map)[*num_maps].data.mux.group = grp->name;
ret = mtk_pctrl_is_function_valid(pctl, pin, fnum);
if (!ret) {
dev_err(pctl->dev, "invalid function %d on pin %d .\n",
fnum, pin);
return -EINVAL;
}
(*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum];
(*num_maps)++;
return 0;
}
static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev,
struct device_node *node,
struct pinctrl_map **map,
unsigned *reserved_maps,
unsigned *num_maps)
{
struct property *pins;
u32 pinfunc, pin, func;
int num_pins, num_funcs, maps_per_pin;
unsigned long *configs;
unsigned int num_configs;
bool has_config = false;
int i, err;
unsigned reserve = 0;
struct mtk_pinctrl_group *grp;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
pins = of_find_property(node, "pinmux", NULL);
if (!pins) {
dev_err(pctl->dev, "missing pins property in node %s .\n",
node->name);
return -EINVAL;
}
err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
&num_configs);
if (err)
return err;
if (num_configs)
has_config = true;
num_pins = pins->length / sizeof(u32);
num_funcs = num_pins;
maps_per_pin = 0;
if (num_funcs)
maps_per_pin++;
if (has_config && num_pins >= 1)
maps_per_pin++;
if (!num_pins || !maps_per_pin) {
err = -EINVAL;
goto exit;
}
reserve = num_pins * maps_per_pin;
err = pinctrl_utils_reserve_map(pctldev, map,
reserved_maps, num_maps, reserve);
if (err < 0)
goto exit;
for (i = 0; i < num_pins; i++) {
err = of_property_read_u32_index(node, "pinmux",
i, &pinfunc);
if (err)
goto exit;
pin = MTK_GET_PIN_NO(pinfunc);
func = MTK_GET_PIN_FUNC(pinfunc);
if (pin >= pctl->devdata->npins ||
func >= ARRAY_SIZE(mtk_gpio_functions)) {
dev_err(pctl->dev, "invalid pins value.\n");
err = -EINVAL;
goto exit;
}
grp = mtk_pctrl_find_group_by_pin(pctl, pin);
if (!grp) {
dev_err(pctl->dev, "unable to match pin %d to group\n",
pin);
err = -EINVAL;
goto exit;
}
err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
reserved_maps, num_maps);
if (err < 0)
goto exit;
if (has_config) {
err = pinctrl_utils_add_map_configs(pctldev, map,
reserved_maps, num_maps, grp->name,
configs, num_configs,
PIN_MAP_TYPE_CONFIGS_GROUP);
if (err < 0)
goto exit;
}
}
err = 0;
exit:
kfree(configs);
return err;
}
static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np_config,
struct pinctrl_map **map, unsigned *num_maps)
{
struct device_node *np;
unsigned reserved_maps;
int ret;
*map = NULL;
*num_maps = 0;
reserved_maps = 0;
for_each_child_of_node(np_config, np) {
ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map,
&reserved_maps, num_maps);
if (ret < 0) {
pinctrl_utils_free_map(pctldev, *map, *num_maps);
of_node_put(np);
return ret;
}
}
return 0;
}
static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->ngroups;
}
static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
return pctl->groups[group].name;
}
static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
unsigned group,
const unsigned **pins,
unsigned *num_pins)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*pins = (unsigned *)&pctl->groups[group].pin;
*num_pins = 1;
return 0;
}
static const struct pinctrl_ops mtk_pctrl_ops = {
.dt_node_to_map = mtk_pctrl_dt_node_to_map,
.dt_free_map = pinctrl_utils_free_map,
.get_groups_count = mtk_pctrl_get_groups_count,
.get_group_name = mtk_pctrl_get_group_name,
.get_group_pins = mtk_pctrl_get_group_pins,
};
static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
{
return ARRAY_SIZE(mtk_gpio_functions);
}
static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
return mtk_gpio_functions[selector];
}
static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char * const **groups,
unsigned * const num_groups)
{
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctl->grp_names;
*num_groups = pctl->ngroups;
return 0;
}
static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev,
unsigned long pin, unsigned long mode)
{
unsigned int reg_addr;
unsigned char bit;
unsigned int val;
unsigned int mask = (1L << GPIO_MODE_BITS) - 1;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
if (pctl->devdata->spec_pinmux_set)
pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin),
pin, mode);
reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf)
+ pctl->devdata->pinmux_offset;
mode &= mask;
bit = pin % MAX_GPIO_MODE_PER_REG;
mask <<= (GPIO_MODE_BITS * bit);
val = (mode << (GPIO_MODE_BITS * bit));
return regmap_update_bits(mtk_get_regmap(pctl, pin),
reg_addr, mask, val);
}
static const struct mtk_desc_pin *
mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num)
{
int i;
const struct mtk_desc_pin *pin;
for (i = 0; i < pctl->devdata->npins; i++) {
pin = pctl->devdata->pins + i;
if (pin->eint.eintnum == eint_num)
return pin;
}
return NULL;
}
static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev,
unsigned function,
unsigned group)
{
bool ret;
const struct mtk_desc_function *desc;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
struct mtk_pinctrl_group *g = pctl->groups + group;
ret = mtk_pctrl_is_function_valid(pctl, g->pin, function);
if (!ret) {
dev_err(pctl->dev, "invalid function %d on group %d .\n",
function, group);
return -EINVAL;
}
desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function);
if (!desc)
return -EINVAL;
mtk_pmx_set_mode(pctldev, g->pin, desc->muxval);
return 0;
}
static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl,
unsigned offset)
{
const struct mtk_desc_pin *pin = pctl->devdata->pins + offset;
const struct mtk_desc_function *func = pin->functions;
while (func && func->name) {
if (!strncmp(func->name, GPIO_MODE_PREFIX,
sizeof(GPIO_MODE_PREFIX)-1))
return func->muxval;
func++;
}
return -EINVAL;
}
static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
int muxval;
struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
muxval = mtk_pmx_find_gpio_mode(pctl, offset);
if (muxval < 0) {
dev_err(pctl->dev, "invalid gpio pin %d.\n", offset);
return -EINVAL;
}
mtk_pmx_set_mode(pctldev, offset, muxval);
mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE);
return 0;
}
static const struct pinmux_ops mtk_pmx_ops = {
.get_functions_count = mtk_pmx_get_funcs_cnt,
.get_function_name = mtk_pmx_get_func_name,
.get_function_groups = mtk_pmx_get_func_groups,
.set_mux = mtk_pmx_set_mux,
.gpio_set_direction = mtk_pmx_gpio_set_direction,
.gpio_request_enable = mtk_pmx_gpio_request_enable,
};
static int mtk_gpio_direction_input(struct gpio_chip *chip,
unsigned offset)
{
return pinctrl_gpio_direction_input(chip->base + offset);
}
static int mtk_gpio_direction_output(struct gpio_chip *chip,
unsigned offset, int value)
{
mtk_gpio_set(chip, offset, value);
return pinctrl_gpio_direction_output(chip->base + offset);
}
static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
unsigned int reg_addr;
unsigned int bit;
unsigned int read_val = 0;
struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
bit = BIT(offset & 0xf);
if (pctl->devdata->spec_dir_set)
pctl->devdata->spec_dir_set(®_addr, offset);
regmap_read(pctl->regmap1, reg_addr, &read_val);
return !(read_val & bit);
}
static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset)
{
unsigned int reg_addr;
unsigned int bit;
unsigned int read_val = 0;
struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
reg_addr = mtk_get_port(pctl, offset) +
pctl->devdata->din_offset;
bit = BIT(offset & 0xf);
regmap_read(pctl->regmap1, reg_addr, &read_val);
return !!(read_val & bit);
}
static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
{
struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
const struct mtk_desc_pin *pin;
unsigned long eint_n;
pin = pctl->devdata->pins + offset;
if (pin->eint.eintnum == NO_EINT_SUPPORT)
return -EINVAL;
eint_n = pin->eint.eintnum;
return mtk_eint_find_irq(pctl->eint, eint_n);
}
static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset,
unsigned long config)
{
struct mtk_pinctrl *pctl = gpiochip_get_data(chip);
const struct mtk_desc_pin *pin;
unsigned long eint_n;
u32 debounce;
if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
return -ENOTSUPP;
pin = pctl->devdata->pins + offset;
if (pin->eint.eintnum == NO_EINT_SUPPORT)
return -EINVAL;
debounce = pinconf_to_config_argument(config);
eint_n = pin->eint.eintnum;
return mtk_eint_set_debounce(pctl->eint, eint_n, debounce);
}
static const struct gpio_chip mtk_gpio_chip = {
.owner = THIS_MODULE,
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.get_direction = mtk_gpio_get_direction,
.direction_input = mtk_gpio_direction_input,
.direction_output = mtk_gpio_direction_output,
.get = mtk_gpio_get,
.set = mtk_gpio_set,
.to_irq = mtk_gpio_to_irq,
.set_config = mtk_gpio_set_config,
.of_gpio_n_cells = 2,
};
static int mtk_eint_suspend(struct device *device)
{
struct mtk_pinctrl *pctl = dev_get_drvdata(device);
return mtk_eint_do_suspend(pctl->eint);
}
static int mtk_eint_resume(struct device *device)
{
struct mtk_pinctrl *pctl = dev_get_drvdata(device);
return mtk_eint_do_resume(pctl->eint);
}
const struct dev_pm_ops mtk_eint_pm_ops = {
.suspend_noirq = mtk_eint_suspend,
.resume_noirq = mtk_eint_resume,
};
static int mtk_pctrl_build_state(struct platform_device *pdev)
{
struct mtk_pinctrl *pctl = platform_get_drvdata(pdev);
int i;
pctl->ngroups = pctl->devdata->npins;
/* Allocate groups */
pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups,
sizeof(*pctl->groups), GFP_KERNEL);
if (!pctl->groups)
return -ENOMEM;
/* We assume that one pin is one group, use pin name as group name. */
pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups,
sizeof(*pctl->grp_names), GFP_KERNEL);
if (!pctl->grp_names)
return -ENOMEM;
for (i = 0; i < pctl->devdata->npins; i++) {
const struct mtk_desc_pin *pin = pctl->devdata->pins + i;
struct mtk_pinctrl_group *group = pctl->groups + i;
group->name = pin->pin.name;
group->pin = pin->pin.number;
pctl->grp_names[i] = pin->pin.name;
}
return 0;
}
static int
mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n,
struct gpio_chip **gpio_chip)
{
struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data;
const struct mtk_desc_pin *pin;
pin = mtk_find_pin_by_eint_num(pctl, eint_n);
if (!pin)
return -EINVAL;
*gpio_chip = pctl->chip;
*gpio_n = pin->pin.number;
return 0;
}
static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n)
{
struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data;
const struct mtk_desc_pin *pin;
pin = mtk_find_pin_by_eint_num(pctl, eint_n);
if (!pin)
return -EINVAL;
return mtk_gpio_get(pctl->chip, pin->pin.number);
}
static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n)
{
struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data;
const struct mtk_desc_pin *pin;
pin = mtk_find_pin_by_eint_num(pctl, eint_n);
if (!pin)
return -EINVAL;
/* set mux to INT mode */
mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux);
/* set gpio direction to input */
mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number,
true);
/* set input-enable */
mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1,
PIN_CONFIG_INPUT_ENABLE);
return 0;
}
static const struct mtk_eint_xt mtk_eint_xt = {
.get_gpio_n = mtk_xt_get_gpio_n,
.get_gpio_state = mtk_xt_get_gpio_state,
.set_gpio_as_eint = mtk_xt_set_gpio_as_eint,
};
static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct resource *res;
if (!of_property_read_bool(np, "interrupt-controller"))
return -ENODEV;
pctl->eint = devm_kzalloc(pctl->dev, sizeof(*pctl->eint), GFP_KERNEL);
if (!pctl->eint)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "Unable to get eint resource\n");
return -ENODEV;
}
pctl->eint->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pctl->eint->base))
return PTR_ERR(pctl->eint->base);
pctl->eint->irq = irq_of_parse_and_map(np, 0);
if (!pctl->eint->irq)
return -EINVAL;
pctl->eint->dev = &pdev->dev;
/*
* If pctl->eint->regs == NULL, it would fall back into using a generic
* register map in mtk_eint_do_init calls.
*/
pctl->eint->regs = pctl->devdata->eint_regs;
pctl->eint->hw = &pctl->devdata->eint_hw;
pctl->eint->pctl = pctl;
pctl->eint->gpio_xlate = &mtk_eint_xt;
return mtk_eint_do_init(pctl->eint);
}
int mtk_pctrl_init(struct platform_device *pdev,
const struct mtk_pinctrl_devdata *data,
struct regmap *regmap)
{
struct pinctrl_pin_desc *pins;
struct mtk_pinctrl *pctl;
struct device_node *np = pdev->dev.of_node, *node;
struct property *prop;
int ret, i;
pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
if (!pctl)
return -ENOMEM;
platform_set_drvdata(pdev, pctl);
prop = of_find_property(np, "pins-are-numbered", NULL);
if (!prop) {
dev_err(&pdev->dev, "only support pins-are-numbered format\n");
return -EINVAL;
}
node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
if (node) {
pctl->regmap1 = syscon_node_to_regmap(node);
if (IS_ERR(pctl->regmap1))
return PTR_ERR(pctl->regmap1);
} else if (regmap) {
pctl->regmap1 = regmap;
} else {
dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n");
return -EINVAL;
}
/* Only 8135 has two base addr, other SoCs have only one. */
node = of_parse_phandle(np, "mediatek,pctl-regmap", 1);
if (node) {
pctl->regmap2 = syscon_node_to_regmap(node);
if (IS_ERR(pctl->regmap2))
return PTR_ERR(pctl->regmap2);
}
pctl->devdata = data;
ret = mtk_pctrl_build_state(pdev);
if (ret) {
dev_err(&pdev->dev, "build state failed: %d\n", ret);
return -EINVAL;
}
pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins),
GFP_KERNEL);
if (!pins)
return -ENOMEM;
for (i = 0; i < pctl->devdata->npins; i++)
pins[i] = pctl->devdata->pins[i].pin;
pctl->pctl_desc.name = dev_name(&pdev->dev);
pctl->pctl_desc.owner = THIS_MODULE;
pctl->pctl_desc.pins = pins;
pctl->pctl_desc.npins = pctl->devdata->npins;
pctl->pctl_desc.confops = &mtk_pconf_ops;
pctl->pctl_desc.pctlops = &mtk_pctrl_ops;
pctl->pctl_desc.pmxops = &mtk_pmx_ops;
pctl->dev = &pdev->dev;
pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
pctl);
if (IS_ERR(pctl->pctl_dev)) {
dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
return PTR_ERR(pctl->pctl_dev);
}
pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
if (!pctl->chip)
return -ENOMEM;
*pctl->chip = mtk_gpio_chip;
pctl->chip->ngpio = pctl->devdata->npins;
pctl->chip->label = dev_name(&pdev->dev);
pctl->chip->parent = &pdev->dev;
pctl->chip->base = -1;
ret = gpiochip_add_data(pctl->chip, pctl);
if (ret)
return -EINVAL;
/* Register the GPIO to pin mappings. */
ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev),
0, 0, pctl->devdata->npins);
if (ret) {
ret = -EINVAL;
goto chip_error;
}
ret = mtk_eint_init(pctl, pdev);
if (ret)
goto chip_error;
return 0;
chip_error:
gpiochip_remove(pctl->chip);
return ret;
}
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