// SPDX-License-Identifier: GPL-2.0
/*
* Renesas RZ/V2M Pin Control and GPIO driver core
*
* Based on:
* Renesas RZ/G2L Pin Control and GPIO driver core
*
* Copyright (C) 2022 Renesas Electronics Corporation.
*/
#include <linux/bitfield.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/gpio/driver.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <dt-bindings/pinctrl/rzv2m-pinctrl.h>
#include "../core.h"
#include "../pinconf.h"
#include "../pinmux.h"
#define DRV_NAME
"pinctrl-rzv2m"
/*
* Use 16 lower bits [15:0] for pin identifier
* Use 16 higher bits [31:16] for pin mux function
*/
#define MUX_PIN_ID_MASK GENMASK(15, 0)
#define MUX_FUNC_MASK GENMASK(31, 16)
#define MUX_FUNC(pinconf) FIELD_GET(MUX_FUNC_MASK, (pinconf))
/* PIN capabilities */
#define PIN_CFG_GRP_1_8V_2 1
#define PIN_CFG_GRP_1_8V_3 2
#define PIN_CFG_GRP_SWIO_1 3
#define PIN_CFG_GRP_SWIO_2 4
#define PIN_CFG_GRP_3_3V 5
#define PIN_CFG_GRP_MASK GENMASK(2, 0)
#define PIN_CFG_BIAS BIT(3)
#define PIN_CFG_DRV BIT(4)
#define PIN_CFG_SLEW BIT(5)
#define RZV2M_MPXED_PIN_FUNCS (PIN_CFG_BIAS | \
PIN_CFG_DRV | \
PIN_CFG_SLEW)
/*
* n indicates number of pins in the port, a is the register index
* and f is pin configuration capabilities supported.
*/
#define RZV2M_GPIO_PORT_PACK(n, a, f) (((n) << 24) | ((a) << 16) | (f))
#define RZV2M_GPIO_PORT_GET_PINCNT(x) FIELD_GET(GENMASK(31, 24), (x))
#define RZV2M_GPIO_PORT_GET_INDEX(x) FIELD_GET(GENMASK(23, 16), (x))
#define RZV2M_GPIO_PORT_GET_CFGS(x) FIELD_GET(GENMASK(15, 0), (x))
#define RZV2M_DEDICATED_PORT_IDX 22
/*
* BIT(31) indicates dedicated pin, b is the register bits (b * 16)
* and f is the pin configuration capabilities supported.
*/
#define RZV2M_SINGLE_PIN BIT(31)
#define RZV2M_SINGLE_PIN_PACK(b, f) (RZV2M_SINGLE_PIN | \
((RZV2M_DEDICATED_PORT_IDX) << 24) | \
((b) << 16) | (f))
#define RZV2M_SINGLE_PIN_GET_PORT(x) FIELD_GET(GENMASK(30, 24), (x))
#define RZV2M_SINGLE_PIN_GET_BIT(x) FIELD_GET(GENMASK(23, 16), (x))
#define RZV2M_SINGLE_PIN_GET_CFGS(x) FIELD_GET(GENMASK(15, 0), (x))
#define RZV2M_PIN_ID_TO_PORT(id) ((id) / RZV2M_PINS_PER_PORT)
#define RZV2M_PIN_ID_TO_PIN(id) ((id) % RZV2M_PINS_PER_PORT)
#define DO(n) (0x00 + (n) * 0x40)
#define OE(n) (0x04 + (n) * 0x40)
#define IE(n) (0x08 + (n) * 0x40)
#define PFSEL(n) (0x10 + (n) * 0x40)
#define DI(n) (0x20 + (n) * 0x40)
#define PUPD(n) (0x24 + (n) * 0x40)
#define DRV(n) ((n) < RZV2M_DEDICATED_PORT_IDX ? (0x28 + (n) * 0x40) \
: 0x590)
#define SR(n) ((n) < RZV2M_DEDICATED_PORT_IDX ? (0x2c + (n) * 0x40) \
: 0x594)
#define DI_MSK(n) (0x30 + (n) * 0x40)
#define EN_MSK(n) (0x34 + (n) * 0x40)
#define PFC_MASK 0x07
#define PUPD_MASK 0x03
#define DRV_MASK 0x03
struct rzv2m_dedicated_configs {
const char *name;
u32 config;
};
struct rzv2m_pinctrl_data {
const char *
const *port_pins;
const u32 *port_pin_configs;
const struct rzv2m_dedicated_configs *dedicated_pins;
unsigned int n_port_pins;
unsigned int n_dedicated_pins;
};
struct rzv2m_pinctrl {
struct pinctrl_dev *pctl;
struct pinctrl_desc desc;
struct pinctrl_pin_desc *pins;
const struct rzv2m_pinctrl_data *data;
void __iomem *base;
struct device *dev;
struct gpio_chip gpio_chip;
struct pinctrl_gpio_range gpio_range;
spinlock_t lock;
/* lock read/write registers */
struct mutex mutex;
/* serialize adding groups and functions */
};
static const unsigned int drv_1_8V_group2_uA[] = { 1800, 3800, 7800, 11000 };
static const unsigned int drv_1_8V_group3_uA[] = { 1600, 3200, 6400, 9600 };
static const unsigned int drv_SWIO_group2_3_3V_uA[] = { 9000, 11000, 13000, 18000 };
static const unsigned int drv_3_3V_group_uA[] = { 2000, 4000, 8000, 12000 };
/* Helper for registers that have a write enable bit in the upper word */
static void rzv2m_writel_we(
void __iomem *addr, u8 shift, u8 value)
{
writel((BIT(16) | value) << shift, addr);
}
static void rzv2m_pinctrl_set_pfc_mode(
struct rzv2m_pinctrl *pctrl,
u8 port, u8 pin, u8 func)
{
void __iomem *addr;
/* Mask input/output */
rzv2m_writel_we(pctrl->base + DI_MSK(port), pin, 1);
rzv2m_writel_we(pctrl->base + EN_MSK(port), pin, 1);
/* Select the function and set the write enable bits */
addr = pctrl->base + PFSEL(port) + (pin / 4) * 4;
writel(((PFC_MASK << 16) | func) << ((pin % 4) * 4), addr);
/* Unmask input/output */
rzv2m_writel_we(pctrl->base + EN_MSK(port), pin, 0);
rzv2m_writel_we(pctrl->base + DI_MSK(port), pin, 0);
};
static int rzv2m_pinctrl_set_mux(
struct pinctrl_dev *pctldev,
unsigned int func_selector,
unsigned int group_selector)
{
struct rzv2m_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct function_desc *func;
unsigned int i, *psel_val;
struct group_desc *group;
const unsigned int *pins;
func = pinmux_generic_get_function(pctldev, func_selector);
if (!func)
return -EINVAL;
group = pinctrl_generic_get_group(pctldev, group_selector);
if (!group)
return -EINVAL;
psel_val = func->data;
pins = group->grp.pins;
for (i = 0; i < group->grp.npins; i++) {
dev_dbg(pctrl->dev,
"port:%u pin: %u PSEL:%u\n",
RZV2M_PIN_ID_TO_PORT(pins[i]), RZV2M_PIN_ID_TO_PIN(pins[i]),
psel_val[i]);
rzv2m_pinctrl_set_pfc_mode(pctrl, RZV2M_PIN_ID_TO_PORT(pins[i]),
RZV2M_PIN_ID_TO_PIN(pins[i]), psel_val[i]);
}
return 0;
};
static int rzv2m_map_add_config(
struct pinctrl_map *map,
const char *group_or_pin,
enum pinctrl_map_type type,
unsigned long *configs,
unsigned int num_configs)
{
unsigned long *cfgs;
cfgs = kmemdup_array(configs, num_configs,
sizeof(*cfgs), GFP_KERNEL);
if (!cfgs)
return -ENOMEM;
map->type = type;
map->data.configs.group_or_pin = group_or_pin;
map->data.configs.configs = cfgs;
map->data.configs.num_configs = num_configs;
return 0;
}
static int rzv2m_dt_subnode_to_map(
struct pinctrl_dev *pctldev,
struct device_node *np,
struct device_node *parent,
struct pinctrl_map **map,
unsigned int *num_maps,
unsigned int *index)
{
struct rzv2m_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct pinctrl_map *maps = *map;
unsigned int nmaps = *num_maps;
unsigned long *configs = NULL;
unsigned int *pins, *psel_val;
unsigned int num_pinmux = 0;
unsigned int idx = *index;
unsigned int num_pins, i;
unsigned int num_configs;
struct property *pinmux;
struct property *prop;
int ret, gsel, fsel;
const char **pin_fn;
const char *name;
const char *pin;
pinmux = of_find_property(np,
"pinmux", NULL);
if (pinmux)
num_pinmux = pinmux->length /
sizeof(u32);
ret = of_property_count_strings(np,
"pins");
if (ret == -EINVAL) {
num_pins = 0;
}
else if (ret < 0) {
dev_err(pctrl->dev,
"Invalid pins list in DT\n");
return ret;
}
else {
num_pins = ret;
}
if (!num_pinmux && !num_pins)
return 0;
if (num_pinmux && num_pins) {
dev_err(pctrl->dev,
"DT node must contain either a pinmux or pins and not both\n");
return -EINVAL;
}
ret = pinconf_generic_parse_dt_config(np, NULL, &configs, &num_configs);
if (ret < 0)
return ret;
if (num_pins && !num_configs) {
dev_err(pctrl->dev,
"DT node must contain a config\n");
ret = -ENODEV;
goto done;
}
if (num_pinmux)
nmaps += 1;
if (num_pins)
nmaps += num_pins;
maps = krealloc_array(maps, nmaps,
sizeof(*maps), GFP_KERNEL);
if (!maps) {
ret = -ENOMEM;
goto done;
}
*map = maps;
*num_maps = nmaps;
if (num_pins) {
of_property_for_each_string(np,
"pins", prop, pin) {
ret = rzv2m_map_add_config(&maps[idx], pin,
PIN_MAP_TYPE_CONFIGS_PIN,
configs, num_configs);
if (ret < 0)
goto done;
idx++;
}
ret = 0;
goto done;
}
pins = devm_kcalloc(pctrl->dev, num_pinmux,
sizeof(*pins), GFP_KERNEL);
psel_val = devm_kcalloc(pctrl->dev, num_pinmux,
sizeof(*psel_val),
GFP_KERNEL);
pin_fn = devm_kzalloc(pctrl->dev,
sizeof(*pin_fn), GFP_KERNEL);
if (!pins || !psel_val || !pin_fn) {
ret = -ENOMEM;
goto done;
}
/* Collect pin locations and mux settings from DT properties */
for (i = 0; i < num_pinmux; ++i) {
u32 value;
ret = of_property_read_u32_index(np,
"pinmux", i, &value);
if (ret)
goto done;
pins[i] = value & MUX_PIN_ID_MASK;
psel_val[i] = MUX_FUNC(value);
}
if (parent) {
name = devm_kasprintf(pctrl->dev, GFP_KERNEL,
"%pOFn.%pOFn",
parent, np);
if (!name) {
ret = -ENOMEM;
goto done;
}
}
else {
name = np->name;
}
mutex_lock(&pctrl->mutex);
/* Register a single pin group listing all the pins we read from DT */
gsel = pinctrl_generic_add_group(pctldev, name, pins, num_pinmux, NULL);
if (gsel < 0) {
ret = gsel;
goto unlock;
}
/*
* Register a single group function where the 'data' is an array PSEL
* register values read from DT.
*/
pin_fn[0] = name;
fsel = pinmux_generic_add_function(pctldev, name, pin_fn, 1, psel_val);
if (fsel < 0) {
ret = fsel;
goto remove_group;
}
mutex_unlock(&pctrl->mutex);
maps[idx].type = PIN_MAP_TYPE_MUX_GROUP;
maps[idx].data.mux.group = name;
maps[idx].data.mux.function = name;
idx++;
dev_dbg(pctrl->dev,
"Parsed %pOF with %d pins\n", np, num_pinmux);
ret = 0;
goto done;
remove_group:
pinctrl_generic_remove_group(pctldev, gsel);
unlock:
mutex_unlock(&pctrl->mutex);
done:
*index = idx;
kfree(configs);
return ret;
}
static void rzv2m_dt_free_map(
struct pinctrl_dev *pctldev,
struct pinctrl_map *map,
unsigned int num_maps)
{
unsigned int i;
if (!map)
return;
for (i = 0; i < num_maps; ++i) {
if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP ||
map[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
kfree(map[i].data.configs.configs);
}
kfree(map);
}
static int rzv2m_dt_node_to_map(
struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map,
unsigned int *num_maps)
{
struct rzv2m_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
unsigned int index;
int ret;
*map = NULL;
*num_maps = 0;
index = 0;
for_each_child_of_node_scoped(np, child) {
ret = rzv2m_dt_subnode_to_map(pctldev, child, np, map,
num_maps, &index);
if (ret < 0)
goto done;
}
if (*num_maps == 0) {
ret = rzv2m_dt_subnode_to_map(pctldev, np, NULL, map,
num_maps, &index);
if (ret < 0)
goto done;
}
if (*num_maps)
return 0;
dev_err(pctrl->dev,
"no mapping found in node %pOF\n", np);
ret = -EINVAL;
done:
rzv2m_dt_free_map(pctldev, *map, *num_maps);
return ret;
}
static int rzv2m_validate_gpio_pin(
struct rzv2m_pinctrl *pctrl,
u32 cfg, u32 port, u8 bit)
{
u8 pincount = RZV2M_GPIO_PORT_GET_PINCNT(cfg);
u32 port_index = RZV2M_GPIO_PORT_GET_INDEX(cfg);
u32 data;
if (bit >= pincount || port >= pctrl->data->n_port_pins)
return -EINVAL;
data = pctrl->data->port_pin_configs[port];
if (port_index != RZV2M_GPIO_PORT_GET_INDEX(data))
return -EINVAL;
return 0;
}
static void rzv2m_rmw_pin_config(
struct rzv2m_pinctrl *pctrl, u32 offset,
u8 shift, u32 mask, u32 val)
{
void __iomem *addr = pctrl->base + offset;
unsigned long flags;
u32 reg;
spin_lock_irqsave(&pctrl->lock, flags);
reg = readl(addr) & ~(mask << shift);
writel(reg | (val << shift), addr);
spin_unlock_irqrestore(&pctrl->lock, flags);
}
static int rzv2m_pinctrl_pinconf_get(
struct pinctrl_dev *pctldev,
unsigned int _pin,
unsigned long *config)
{
struct rzv2m_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
const struct pinctrl_pin_desc *pin = &pctrl->desc.pins[_pin];
unsigned int *pin_data = pin->drv_data;
unsigned int arg = 0;
u32 port;
u32 cfg;
u8 bit;
u32 val;
if (!pin_data)
return -EINVAL;
if (*pin_data & RZV2M_SINGLE_PIN) {
port = RZV2M_SINGLE_PIN_GET_PORT(*pin_data);
cfg = RZV2M_SINGLE_PIN_GET_CFGS(*pin_data);
bit = RZV2M_SINGLE_PIN_GET_BIT(*pin_data);
}
else {
cfg = RZV2M_GPIO_PORT_GET_CFGS(*pin_data);
port = RZV2M_PIN_ID_TO_PORT(_pin);
bit = RZV2M_PIN_ID_TO_PIN(_pin);
if (rzv2m_validate_gpio_pin(pctrl, *pin_data, RZV2M_PIN_ID_TO_PORT(_pin), bit))
return -EINVAL;
}
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN: {
enum pin_config_param bias;
if (!(cfg & PIN_CFG_BIAS))
return -EINVAL;
/* PUPD uses 2-bits per pin */
bit *= 2;
switch ((readl(pctrl->base + PUPD(port)) >> bit) & PUPD_MASK) {
case 0:
bias = PIN_CONFIG_BIAS_PULL_DOWN;
break;
case 2:
bias = PIN_CONFIG_BIAS_PULL_UP;
break;
default:
bias = PIN_CONFIG_BIAS_DISABLE;
}
if (bias != param)
return -EINVAL;
break;
}
case PIN_CONFIG_DRIVE_STRENGTH_UA:
if (!(cfg & PIN_CFG_DRV))
return -EINVAL;
/* DRV uses 2-bits per pin */
bit *= 2;
val = (readl(pctrl->base + DRV(port)) >> bit) & DRV_MASK;
switch (cfg & PIN_CFG_GRP_MASK) {
case PIN_CFG_GRP_1_8V_2:
arg = drv_1_8V_group2_uA[val];
break;
case PIN_CFG_GRP_1_8V_3:
arg = drv_1_8V_group3_uA[val];
break;
case PIN_CFG_GRP_SWIO_2:
arg = drv_SWIO_group2_3_3V_uA[val];
break;
case PIN_CFG_GRP_SWIO_1:
case PIN_CFG_GRP_3_3V:
arg = drv_3_3V_group_uA[val];
break;
default:
return -EINVAL;
}
break;
case PIN_CONFIG_SLEW_RATE:
if (!(cfg & PIN_CFG_SLEW))
return -EINVAL;
arg = readl(pctrl->base + SR(port)) & BIT(bit);
break;
default:
return -ENOTSUPP;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
};
static int rzv2m_pinctrl_pinconf_set(
struct pinctrl_dev *pctldev,
unsigned int _pin,
unsigned long *_configs,
unsigned int num_configs)
{
struct rzv2m_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
const struct pinctrl_pin_desc *pin = &pctrl->desc.pins[_pin];
unsigned int *pin_data = pin->drv_data;
enum pin_config_param param;
u32 port;
unsigned int i;
u32 cfg;
u8 bit;
u32 val;
if (!pin_data)
return -EINVAL;
if (*pin_data & RZV2M_SINGLE_PIN) {
port = RZV2M_SINGLE_PIN_GET_PORT(*pin_data);
cfg = RZV2M_SINGLE_PIN_GET_CFGS(*pin_data);
bit = RZV2M_SINGLE_PIN_GET_BIT(*pin_data);
}
else {
cfg = RZV2M_GPIO_PORT_GET_CFGS(*pin_data);
port = RZV2M_PIN_ID_TO_PORT(_pin);
bit = RZV2M_PIN_ID_TO_PIN(_pin);
if (rzv2m_validate_gpio_pin(pctrl, *pin_data, RZV2M_PIN_ID_TO_PORT(_pin), bit))
return -EINVAL;
}
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(_configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
if (!(cfg & PIN_CFG_BIAS))
return -EINVAL;
/* PUPD uses 2-bits per pin */
bit *= 2;
switch (param) {
case PIN_CONFIG_BIAS_PULL_DOWN:
val = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
val = 2;
break;
default:
val = 1;
}
rzv2m_rmw_pin_config(pctrl, PUPD(port), bit, PUPD_MASK, val);
break;
case PIN_CONFIG_DRIVE_STRENGTH_UA: {
unsigned int arg = pinconf_to_config_argument(_configs[i]);
const unsigned int *drv_strengths;
unsigned int index;
if (!(cfg & PIN_CFG_DRV))
return -EINVAL;
switch (cfg & PIN_CFG_GRP_MASK) {
case PIN_CFG_GRP_1_8V_2:
drv_strengths = drv_1_8V_group2_uA;
break;
case PIN_CFG_GRP_1_8V_3:
drv_strengths = drv_1_8V_group3_uA;
break;
case PIN_CFG_GRP_SWIO_2:
drv_strengths = drv_SWIO_group2_3_3V_uA;
break;
case PIN_CFG_GRP_SWIO_1:
case PIN_CFG_GRP_3_3V:
drv_strengths = drv_3_3V_group_uA;
break;
default:
return -EINVAL;
}
for (index = 0; index < 4; index++) {
if (arg == drv_strengths[index])
break;
}
if (index >= 4)
return -EINVAL;
/* DRV uses 2-bits per pin */
bit *= 2;
rzv2m_rmw_pin_config(pctrl, DRV(port), bit, DRV_MASK, index);
break;
}
case PIN_CONFIG_SLEW_RATE: {
unsigned int arg = pinconf_to_config_argument(_configs[i]);
if (!(cfg & PIN_CFG_SLEW))
return -EINVAL;
rzv2m_writel_we(pctrl->base + SR(port), bit, !arg);
break;
}
default:
return -EOPNOTSUPP;
}
}
return 0;
}
static int rzv2m_pinctrl_pinconf_group_set(
struct pinctrl_dev *pctldev,
unsigned int group,
unsigned long *configs,
unsigned int num_configs)
{
const unsigned int *pins;
unsigned int i, npins;
int ret;
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
if (ret)
return ret;
for (i = 0; i < npins; i++) {
ret = rzv2m_pinctrl_pinconf_set(pctldev, pins[i], configs,
num_configs);
if (ret)
return ret;
}
return 0;
};
static int rzv2m_pinctrl_pinconf_group_get(
struct pinctrl_dev *pctldev,
unsigned int group,
unsigned long *config)
{
const unsigned int *pins;
unsigned int i, npins, prev_config = 0;
int ret;
ret = pinctrl_generic_get_group_pins(pctldev, group, &pins, &npins);
if (ret)
return ret;
for (i = 0; i < npins; i++) {
ret = rzv2m_pinctrl_pinconf_get(pctldev, pins[i], config);
if (ret)
return ret;
/* Check config matches previous pins */
if (i && prev_config != *config)
return -EOPNOTSUPP;
prev_config = *config;
}
return 0;
};
static const struct pinctrl_ops rzv2m_pinctrl_pctlops = {
.get_groups_count = pinctrl_generic_get_group_count,
.get_group_name = pinctrl_generic_get_group_name,
.get_group_pins = pinctrl_generic_get_group_pins,
.dt_node_to_map = rzv2m_dt_node_to_map,
.dt_free_map = rzv2m_dt_free_map,
};
static const struct pinmux_ops rzv2m_pinctrl_pmxops = {
.get_functions_count = pinmux_generic_get_function_count,
.get_function_name = pinmux_generic_get_function_name,
.get_function_groups = pinmux_generic_get_function_groups,
.set_mux = rzv2m_pinctrl_set_mux,
.strict =
true,
};
static const struct pinconf_ops rzv2m_pinctrl_confops = {
.is_generic =
true,
.pin_config_get = rzv2m_pinctrl_pinconf_get,
.pin_config_set = rzv2m_pinctrl_pinconf_set,
.pin_config_group_set = rzv2m_pinctrl_pinconf_group_set,
.pin_config_group_get = rzv2m_pinctrl_pinconf_group_get,
.pin_config_config_dbg_show = pinconf_generic_dump_config,
};
static int rzv2m_gpio_request(
struct gpio_chip *chip,
unsigned int offset)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
int ret;
ret = pinctrl_gpio_request(chip, offset);
if (ret)
return ret;
rzv2m_pinctrl_set_pfc_mode(pctrl, port, bit, 0);
return 0;
}
static void rzv2m_gpio_set_direction(
struct rzv2m_pinctrl *pctrl, u32 port,
u8 bit,
bool output)
{
rzv2m_writel_we(pctrl->base + OE(port), bit, output);
rzv2m_writel_we(pctrl->base + IE(port), bit, !output);
}
static int rzv2m_gpio_get_direction(
struct gpio_chip *chip,
unsigned int offset)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
if (!(readl(pctrl->base + IE(port)) & BIT(bit)))
return GPIO_LINE_DIRECTION_OUT;
return GPIO_LINE_DIRECTION_IN;
}
static int rzv2m_gpio_direction_input(
struct gpio_chip *chip,
unsigned int offset)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
rzv2m_gpio_set_direction(pctrl, port, bit,
false);
return 0;
}
static int rzv2m_gpio_set(
struct gpio_chip *chip,
unsigned int offset,
int value)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
rzv2m_writel_we(pctrl->base +
DO(port), bit, !!value);
return 0;
}
static int rzv2m_gpio_direction_output(
struct gpio_chip *chip,
unsigned int offset,
int value)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
rzv2m_gpio_set(chip, offset, value);
rzv2m_gpio_set_direction(pctrl, port, bit,
true);
return 0;
}
static int rzv2m_gpio_get(
struct gpio_chip *chip,
unsigned int offset)
{
struct rzv2m_pinctrl *pctrl = gpiochip_get_data(chip);
u32 port = RZV2M_PIN_ID_TO_PORT(offset);
u8 bit = RZV2M_PIN_ID_TO_PIN(offset);
int direction = rzv2m_gpio_get_direction(chip, offset);
if (direction == GPIO_LINE_DIRECTION_IN)
return !!(readl(pctrl->base + DI(port)) & BIT(bit));
else
return !!(readl(pctrl->base +
DO(port)) & BIT(bit));
}
static void rzv2m_gpio_free(
struct gpio_chip *chip,
unsigned int offset)
{
pinctrl_gpio_free(chip, offset);
/*
* Set the GPIO as an input to ensure that the next GPIO request won't
* drive the GPIO pin as an output.
*/
rzv2m_gpio_direction_input(chip, offset);
}
static const char *
const rzv2m_gpio_names[] = {
"P0_0",
"P0_1",
"P0_2",
"P0_3",
"P0_4",
"P0_5",
"P0_6",
"P0_7",
"P0_8",
"P0_9",
"P0_10",
"P0_11",
"P0_12",
"P0_13",
"P0_14",
"P0_15",
"P1_0",
"P1_1",
"P1_2",
"P1_3",
"P1_4",
"P1_5",
"P1_6",
"P1_7",
"P1_8",
"P1_9",
"P1_10",
"P1_11",
"P1_12",
"P1_13",
"P1_14",
"P1_15",
"P2_0",
"P2_1",
"P2_2",
"P2_3",
"P2_4",
"P2_5",
"P2_6",
"P2_7",
"P2_8",
"P2_9",
"P2_10",
"P2_11",
"P2_12",
"P2_13",
"P2_14",
"P2_15",
"P3_0",
"P3_1",
"P3_2",
"P3_3",
"P3_4",
"P3_5",
"P3_6",
"P3_7",
"P3_8",
"P3_9",
"P3_10",
"P3_11",
"P3_12",
"P3_13",
"P3_14",
"P3_15",
"P4_0",
"P4_1",
"P4_2",
"P4_3",
"P4_4",
"P4_5",
"P4_6",
"P4_7",
"P4_8",
"P4_9",
"P4_10",
"P4_11",
"P4_12",
"P4_13",
"P4_14",
"P4_15",
"P5_0",
"P5_1",
"P5_2",
"P5_3",
"P5_4",
"P5_5",
"P5_6",
"P5_7",
"P5_8",
"P5_9",
"P5_10",
"P5_11",
"P5_12",
"P5_13",
"P5_14",
"P5_15",
"P6_0",
"P6_1",
"P6_2",
"P6_3",
"P6_4",
"P6_5",
"P6_6",
"P6_7",
"P6_8",
"P6_9",
"P6_10",
"P6_11",
"P6_12",
"P6_13",
"P6_14",
"P6_15",
"P7_0",
"P7_1",
"P7_2",
"P7_3",
"P7_4",
"P7_5",
"P7_6",
"P7_7",
"P7_8",
"P7_9",
"P7_10",
"P7_11",
"P7_12",
"P7_13",
"P7_14",
"P7_15",
"P8_0",
"P8_1",
"P8_2",
"P8_3",
"P8_4",
"P8_5",
"P8_6",
"P8_7",
"P8_8",
"P8_9",
"P8_10",
"P8_11",
"P8_12",
"P8_13",
"P8_14",
"P8_15",
"P9_0",
"P9_1",
"P9_2",
"P9_3",
"P9_4",
"P9_5",
"P9_6",
"P9_7",
"P9_8",
"P9_9",
"P9_10",
"P9_11",
"P9_12",
"P9_13",
"P9_14",
"P9_15",
"P10_0",
"P10_1",
"P10_2",
"P10_3",
"P10_4",
"P10_5",
"P10_6",
"P10_7",
"P10_8",
"P10_9",
"P10_10",
"P10_11",
"P10_12",
"P10_13",
"P10_14",
"P10_15",
"P11_0",
"P11_1",
"P11_2",
"P11_3",
"P11_4",
"P11_5",
"P11_6",
"P11_7",
"P11_8",
"P11_9",
"P11_10",
"P11_11",
"P11_12",
"P11_13",
"P11_14",
"P11_15",
"P12_0",
"P12_1",
"P12_2",
"P12_3",
"P12_4",
"P12_5",
"P12_6",
"P12_7",
"P12_8",
"P12_9",
"P12_10",
"P12_11",
"P12_12",
"P12_13",
"P12_14",
"P12_15",
"P13_0",
"P13_1",
"P13_2",
"P13_3",
"P13_4",
"P13_5",
"P13_6",
"P13_7",
"P13_8",
"P13_9",
"P13_10",
"P13_11",
"P13_12",
"P13_13",
"P13_14",
"P13_15",
"P14_0",
"P14_1",
"P14_2",
"P14_3",
"P14_4",
"P14_5",
"P14_6",
"P14_7",
"P14_8",
"P14_9",
"P14_10",
"P14_11",
"P14_12",
"P14_13",
"P14_14",
"P14_15",
"P15_0",
"P15_1",
"P15_2",
"P15_3",
"P15_4",
"P15_5",
"P15_6",
"P15_7",
"P15_8",
"P15_9",
"P15_10",
"P15_11",
"P15_12",
"P15_13",
"P15_14",
"P15_15",
"P16_0",
"P16_1",
"P16_2",
"P16_3",
"P16_4",
"P16_5",
"P16_6",
"P16_7",
"P16_8",
"P16_9",
"P16_10",
"P16_11",
"P16_12",
"P16_13",
"P16_14",
"P16_15",
"P17_0",
"P17_1",
"P17_2",
"P17_3",
"P17_4",
"P17_5",
"P17_6",
"P17_7",
"P17_8",
"P17_9",
"P17_10",
"P17_11",
"P17_12",
"P17_13",
"P17_14",
"P17_15",
"P18_0",
"P18_1",
"P18_2",
"P18_3",
"P18_4",
"P18_5",
"P18_6",
"P18_7",
"P18_8",
"P18_9",
"P18_10",
"P18_11",
"P18_12",
"P18_13",
"P18_14",
"P18_15",
"P19_0",
"P19_1",
"P19_2",
"P19_3",
"P19_4",
"P19_5",
"P19_6",
"P19_7",
"P19_8",
"P19_9",
"P19_10",
"P19_11",
"P19_12",
"P19_13",
"P19_14",
"P19_15",
"P20_0",
"P20_1",
"P20_2",
"P20_3",
"P20_4",
"P20_5",
"P20_6",
"P20_7",
"P20_8",
"P20_9",
"P20_10",
"P20_11",
"P20_12",
"P20_13",
"P20_14",
"P20_15",
"P21_0",
"P21_1",
"P21_2",
"P21_3",
"P21_4",
"P21_5",
"P21_6",
"P21_7",
"P21_8",
"P21_9",
"P21_10",
"P21_11",
"P21_12",
"P21_13",
"P21_14",
"P21_15",
};
static const u32 rzv2m_gpio_configs[] = {
RZV2M_GPIO_PORT_PACK(14, 0, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(16, 1, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(8, 2, PIN_CFG_GRP_1_8V_3 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(16, 3, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(8, 4, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(4, 5, PIN_CFG_GRP_1_8V_3 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(12, 6, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(6, 7, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(8, 8, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(8, 9, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(9, 10, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(9, 11, PIN_CFG_GRP_SWIO_1 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(4, 12, PIN_CFG_GRP_3_3V | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(12, 13, PIN_CFG_GRP_3_3V | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(8, 14, PIN_CFG_GRP_3_3V | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(16, 15, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(14, 16, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(1, 17, PIN_CFG_GRP_SWIO_2 | RZV2M_MPXED_PIN_FUNCS),
RZV2M_GPIO_PORT_PACK(0, 18, 0),
RZV2M_GPIO_PORT_PACK(0, 19, 0),
RZV2M_GPIO_PORT_PACK(3, 20, PIN_CFG_GRP_1_8V_2 | PIN_CFG_DRV),
RZV2M_GPIO_PORT_PACK(1, 21, PIN_CFG_GRP_SWIO_1 | PIN_CFG_DRV | PIN_CFG_SLEW),
};
static const struct rzv2m_dedicated_configs rzv2m_dedicated_pins[] = {
{
"NAWPN", RZV2M_SINGLE_PIN_PACK(0,
(PIN_CFG_GRP_SWIO_2 | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"IM0CLK", RZV2M_SINGLE_PIN_PACK(1,
(PIN_CFG_GRP_SWIO_1 | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"IM1CLK", RZV2M_SINGLE_PIN_PACK(2,
(PIN_CFG_GRP_SWIO_1 | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"DETDO", RZV2M_SINGLE_PIN_PACK(5,
(PIN_CFG_GRP_1_8V_3 | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"DETMS", RZV2M_SINGLE_PIN_PACK(6,
(PIN_CFG_GRP_1_8V_3 | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"PCRSTOUTB", RZV2M_SINGLE_PIN_PACK(12,
(PIN_CFG_GRP_3_3V | PIN_CFG_DRV | PIN_CFG_SLEW)) },
{
"USPWEN", RZV2M_SINGLE_PIN_PACK(14,
(PIN_CFG_GRP_3_3V | PIN_CFG_DRV | PIN_CFG_SLEW)) },
};
static int rzv2m_gpio_register(
struct rzv2m_pinctrl *pctrl)
{
struct device_node *np = pctrl->dev->of_node;
struct gpio_chip *chip = &pctrl->gpio_chip;
const char *name = dev_name(pctrl->dev);
struct of_phandle_args of_args;
int ret;
ret = of_parse_phandle_with_fixed_args(np,
"gpio-ranges", 3, 0, &of_args);
if (ret) {
dev_err(pctrl->dev,
"Unable to parse gpio-ranges\n");
return ret;
}
of_node_put(of_args.np);
if (of_args.args[0] != 0 || of_args.args[1] != 0 ||
of_args.args[2] != pctrl->data->n_port_pins) {
dev_err(pctrl->dev,
"gpio-ranges does not match selected SOC\n");
return -EINVAL;
}
chip->names = pctrl->data->port_pins;
chip->request = rzv2m_gpio_request;
chip->free = rzv2m_gpio_free;
chip->get_direction = rzv2m_gpio_get_direction;
chip->direction_input = rzv2m_gpio_direction_input;
chip->direction_output = rzv2m_gpio_direction_output;
chip->get = rzv2m_gpio_get;
chip->set = rzv2m_gpio_set;
chip->label = name;
chip->parent = pctrl->dev;
chip->owner = THIS_MODULE;
chip->base = -1;
chip->ngpio = of_args.args[2];
pctrl->gpio_range.id = 0;
pctrl->gpio_range.pin_base = 0;
pctrl->gpio_range.base = 0;
pctrl->gpio_range.npins = chip->ngpio;
pctrl->gpio_range.name = chip->label;
pctrl->gpio_range.gc = chip;
ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
if (ret) {
dev_err(pctrl->dev,
"failed to add GPIO controller\n");
return ret;
}
dev_dbg(pctrl->dev,
"Registered gpio controller\n");
return 0;
}
static int rzv2m_pinctrl_register(
struct rzv2m_pinctrl *pctrl)
{
struct pinctrl_pin_desc *pins;
unsigned int i, j;
u32 *pin_data;
int ret;
pctrl->desc.name = DRV_NAME;
pctrl->desc.npins = pctrl->data->n_port_pins + pctrl->data->n_dedicated_pins;
pctrl->desc.pctlops = &rzv2m_pinctrl_pctlops;
pctrl->desc.pmxops = &rzv2m_pinctrl_pmxops;
pctrl->desc.confops = &rzv2m_pinctrl_confops;
pctrl->desc.owner = THIS_MODULE;
pins = devm_kcalloc(pctrl->dev, pctrl->desc.npins,
sizeof(*pins), GFP_KERNEL);
if (!pins)
return -ENOMEM;
pin_data = devm_kcalloc(pctrl->dev, pctrl->desc.npins,
sizeof(*pin_data), GFP_KERNEL);
if (!pin_data)
return -ENOMEM;
pctrl->pins = pins;
pctrl->desc.pins = pins;
for (i = 0, j = 0; i < pctrl->data->n_port_pins; i++) {
pins[i].number = i;
pins[i].name = pctrl->data->port_pins[i];
if (i && !(i % RZV2M_PINS_PER_PORT))
j++;
pin_data[i] = pctrl->data->port_pin_configs[j];
pins[i].drv_data = &pin_data[i];
}
for (i = 0; i < pctrl->data->n_dedicated_pins; i++) {
unsigned int index = pctrl->data->n_port_pins + i;
pins[index].number = index;
pins[index].name = pctrl->data->dedicated_pins[i].name;
pin_data[index] = pctrl->data->dedicated_pins[i].config;
pins[index].drv_data = &pin_data[index];
}
ret = devm_pinctrl_register_and_init(pctrl->dev, &pctrl->desc, pctrl,
&pctrl->pctl);
if (ret) {
dev_err(pctrl->dev,
"pinctrl registration failed\n");
return ret;
}
ret = pinctrl_enable(pctrl->pctl);
if (ret) {
dev_err(pctrl->dev,
"pinctrl enable failed\n");
return ret;
}
ret = rzv2m_gpio_register(pctrl);
if (ret) {
dev_err(pctrl->dev,
"failed to add GPIO chip: %i\n", ret);
return ret;
}
return 0;
}
static int rzv2m_pinctrl_probe(
struct platform_device *pdev)
{
struct rzv2m_pinctrl *pctrl;
struct clk *clk;
int ret;
pctrl = devm_kzalloc(&pdev->dev,
sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
pctrl->dev = &pdev->dev;
pctrl->data = of_device_get_match_data(&pdev->dev);
if (!pctrl->data)
return -EINVAL;
pctrl->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pctrl->base))
return PTR_ERR(pctrl->base);
clk = devm_clk_get_enabled(pctrl->dev, NULL);
if (IS_ERR(clk))
return dev_err_probe(pctrl->dev, PTR_ERR(clk),
"failed to enable GPIO clk\n");
spin_lock_init(&pctrl->lock);
mutex_init(&pctrl->mutex);
platform_set_drvdata(pdev, pctrl);
ret = rzv2m_pinctrl_register(pctrl);
if (ret)
return ret;
dev_info(pctrl->dev,
"%s support registered\n", DRV_NAME);
return 0;
}
static struct rzv2m_pinctrl_data r9a09g011_data = {
.port_pins = rzv2m_gpio_names,
.port_pin_configs = rzv2m_gpio_configs,
.dedicated_pins = rzv2m_dedicated_pins,
.n_port_pins = ARRAY_SIZE(rzv2m_gpio_configs) * RZV2M_PINS_PER_PORT,
.n_dedicated_pins = ARRAY_SIZE(rzv2m_dedicated_pins),
};
static const struct of_device_id rzv2m_pinctrl_of_table[] = {
{
.compatible =
"renesas,r9a09g011-pinctrl",
.data = &r9a09g011_data,
},
{
/* sentinel */ }
};
static struct platform_driver rzv2m_pinctrl_driver = {
.driver = {
.name = DRV_NAME,
.of_match_table = of_match_ptr(rzv2m_pinctrl_of_table),
},
.probe = rzv2m_pinctrl_probe,
};
static int __init rzv2m_pinctrl_init(
void)
{
return platform_driver_register(&rzv2m_pinctrl_driver);
}
core_initcall(rzv2m_pinctrl_init);
MODULE_AUTHOR(
"Phil Edworthy ");
MODULE_DESCRIPTION(
"Pin and gpio controller driver for RZ/V2M");