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linux/drivers/pinctrl/pinctrl-rockchip.c

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/*
* Pinctrl driver for Rockchip SoCs
*
* Copyright (c) 2013 MundoReader S.L.
* Author: Heiko Stuebner <heiko@sntech.de>
*
* With some ideas taken from pinctrl-samsung:
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
* http://www.samsung.com
* Copyright (c) 2012 Linaro Ltd
* http://www.linaro.org
*
* and pinctrl-at91:
* Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.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/module.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/machine.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/clk.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include <dt-bindings/pinctrl/rockchip.h>
#include "core.h"
#include "pinconf.h"
/* GPIO control registers */
#define GPIO_SWPORT_DR 0x00
#define GPIO_SWPORT_DDR 0x04
#define GPIO_INTEN 0x30
#define GPIO_INTMASK 0x34
#define GPIO_INTTYPE_LEVEL 0x38
#define GPIO_INT_POLARITY 0x3c
#define GPIO_INT_STATUS 0x40
#define GPIO_INT_RAWSTATUS 0x44
#define GPIO_DEBOUNCE 0x48
#define GPIO_PORTS_EOI 0x4c
#define GPIO_EXT_PORT 0x50
#define GPIO_LS_SYNC 0x60
enum rockchip_pinctrl_type {
RK2928,
RK3066B,
RK3188,
RK3288,
RK3368,
};
/**
* Encode variants of iomux registers into a type variable
*/
#define IOMUX_GPIO_ONLY BIT(0)
#define IOMUX_WIDTH_4BIT BIT(1)
#define IOMUX_SOURCE_PMU BIT(2)
#define IOMUX_UNROUTED BIT(3)
/**
* @type: iomux variant using IOMUX_* constants
* @offset: if initialized to -1 it will be autocalculated, by specifying
* an initial offset value the relevant source offset can be reset
* to a new value for autocalculating the following iomux registers.
*/
struct rockchip_iomux {
int type;
int offset;
};
/**
* @reg_base: register base of the gpio bank
* @reg_pull: optional separate register for additional pull settings
* @clk: clock of the gpio bank
* @irq: interrupt of the gpio bank
* @saved_masks: Saved content of GPIO_INTEN at suspend time.
* @pin_base: first pin number
* @nr_pins: number of pins in this bank
* @name: name of the bank
* @bank_num: number of the bank, to account for holes
* @iomux: array describing the 4 iomux sources of the bank
* @valid: are all necessary informations present
* @of_node: dt node of this bank
* @drvdata: common pinctrl basedata
* @domain: irqdomain of the gpio bank
* @gpio_chip: gpiolib chip
* @grange: gpio range
* @slock: spinlock for the gpio bank
*/
struct rockchip_pin_bank {
void __iomem *reg_base;
struct regmap *regmap_pull;
struct clk *clk;
int irq;
u32 saved_masks;
u32 pin_base;
u8 nr_pins;
char *name;
u8 bank_num;
struct rockchip_iomux iomux[4];
bool valid;
struct device_node *of_node;
struct rockchip_pinctrl *drvdata;
struct irq_domain *domain;
struct gpio_chip gpio_chip;
struct pinctrl_gpio_range grange;
spinlock_t slock;
u32 toggle_edge_mode;
};
#define PIN_BANK(id, pins, label) \
{ \
.bank_num = id, \
.nr_pins = pins, \
.name = label, \
.iomux = { \
{ .offset = -1 }, \
{ .offset = -1 }, \
{ .offset = -1 }, \
{ .offset = -1 }, \
}, \
}
#define PIN_BANK_IOMUX_FLAGS(id, pins, label, iom0, iom1, iom2, iom3) \
{ \
.bank_num = id, \
.nr_pins = pins, \
.name = label, \
.iomux = { \
{ .type = iom0, .offset = -1 }, \
{ .type = iom1, .offset = -1 }, \
{ .type = iom2, .offset = -1 }, \
{ .type = iom3, .offset = -1 }, \
}, \
}
/**
*/
struct rockchip_pin_ctrl {
struct rockchip_pin_bank *pin_banks;
u32 nr_banks;
u32 nr_pins;
char *label;
enum rockchip_pinctrl_type type;
int grf_mux_offset;
int pmu_mux_offset;
void (*pull_calc_reg)(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit);
void (*drv_calc_reg)(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit);
};
struct rockchip_pin_config {
unsigned int func;
unsigned long *configs;
unsigned int nconfigs;
};
/**
* struct rockchip_pin_group: represent group of pins of a pinmux function.
* @name: name of the pin group, used to lookup the group.
* @pins: the pins included in this group.
* @npins: number of pins included in this group.
* @func: the mux function number to be programmed when selected.
* @configs: the config values to be set for each pin
* @nconfigs: number of configs for each pin
*/
struct rockchip_pin_group {
const char *name;
unsigned int npins;
unsigned int *pins;
struct rockchip_pin_config *data;
};
/**
* struct rockchip_pmx_func: represent a pin function.
* @name: name of the pin function, used to lookup the function.
* @groups: one or more names of pin groups that provide this function.
* @num_groups: number of groups included in @groups.
*/
struct rockchip_pmx_func {
const char *name;
const char **groups;
u8 ngroups;
};
struct rockchip_pinctrl {
struct regmap *regmap_base;
int reg_size;
struct regmap *regmap_pull;
struct regmap *regmap_pmu;
struct device *dev;
struct rockchip_pin_ctrl *ctrl;
struct pinctrl_desc pctl;
struct pinctrl_dev *pctl_dev;
struct rockchip_pin_group *groups;
unsigned int ngroups;
struct rockchip_pmx_func *functions;
unsigned int nfunctions;
};
static struct regmap_config rockchip_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
static const inline struct rockchip_pin_group *pinctrl_name_to_group(
const struct rockchip_pinctrl *info,
const char *name)
{
int i;
for (i = 0; i < info->ngroups; i++) {
if (!strcmp(info->groups[i].name, name))
return &info->groups[i];
}
return NULL;
}
/*
* given a pin number that is local to a pin controller, find out the pin bank
* and the register base of the pin bank.
*/
static struct rockchip_pin_bank *pin_to_bank(struct rockchip_pinctrl *info,
unsigned pin)
{
struct rockchip_pin_bank *b = info->ctrl->pin_banks;
while (pin >= (b->pin_base + b->nr_pins))
b++;
return b;
}
static struct rockchip_pin_bank *bank_num_to_bank(
struct rockchip_pinctrl *info,
unsigned num)
{
struct rockchip_pin_bank *b = info->ctrl->pin_banks;
int i;
for (i = 0; i < info->ctrl->nr_banks; i++, b++) {
if (b->bank_num == num)
return b;
}
return ERR_PTR(-EINVAL);
}
/*
* Pinctrl_ops handling
*/
static int rockchip_get_groups_count(struct pinctrl_dev *pctldev)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->ngroups;
}
static const char *rockchip_get_group_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->groups[selector].name;
}
static int rockchip_get_group_pins(struct pinctrl_dev *pctldev,
unsigned selector, const unsigned **pins,
unsigned *npins)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
if (selector >= info->ngroups)
return -EINVAL;
*pins = info->groups[selector].pins;
*npins = info->groups[selector].npins;
return 0;
}
static int rockchip_dt_node_to_map(struct pinctrl_dev *pctldev,
struct device_node *np,
struct pinctrl_map **map, unsigned *num_maps)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
const struct rockchip_pin_group *grp;
struct pinctrl_map *new_map;
struct device_node *parent;
int map_num = 1;
int i;
/*
* first find the group of this node and check if we need to create
* config maps for pins
*/
grp = pinctrl_name_to_group(info, np->name);
if (!grp) {
dev_err(info->dev, "unable to find group for node %s\n",
np->name);
return -EINVAL;
}
map_num += grp->npins;
new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num,
GFP_KERNEL);
if (!new_map)
return -ENOMEM;
*map = new_map;
*num_maps = map_num;
/* create mux map */
parent = of_get_parent(np);
if (!parent) {
devm_kfree(pctldev->dev, new_map);
return -EINVAL;
}
new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
new_map[0].data.mux.function = parent->name;
new_map[0].data.mux.group = np->name;
of_node_put(parent);
/* create config map */
new_map++;
for (i = 0; i < grp->npins; i++) {
new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
new_map[i].data.configs.group_or_pin =
pin_get_name(pctldev, grp->pins[i]);
new_map[i].data.configs.configs = grp->data[i].configs;
new_map[i].data.configs.num_configs = grp->data[i].nconfigs;
}
dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
(*map)->data.mux.function, (*map)->data.mux.group, map_num);
return 0;
}
static void rockchip_dt_free_map(struct pinctrl_dev *pctldev,
struct pinctrl_map *map, unsigned num_maps)
{
}
static const struct pinctrl_ops rockchip_pctrl_ops = {
.get_groups_count = rockchip_get_groups_count,
.get_group_name = rockchip_get_group_name,
.get_group_pins = rockchip_get_group_pins,
.dt_node_to_map = rockchip_dt_node_to_map,
.dt_free_map = rockchip_dt_free_map,
};
/*
* Hardware access
*/
static int rockchip_get_mux(struct rockchip_pin_bank *bank, int pin)
{
struct rockchip_pinctrl *info = bank->drvdata;
int iomux_num = (pin / 8);
struct regmap *regmap;
unsigned int val;
int reg, ret, mask;
u8 bit;
if (iomux_num > 3)
return -EINVAL;
if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
dev_err(info->dev, "pin %d is unrouted\n", pin);
return -EINVAL;
}
if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY)
return RK_FUNC_GPIO;
regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
? info->regmap_pmu : info->regmap_base;
/* get basic quadrupel of mux registers and the correct reg inside */
mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
reg = bank->iomux[iomux_num].offset;
if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
if ((pin % 8) >= 4)
reg += 0x4;
bit = (pin % 4) * 4;
} else {
bit = (pin % 8) * 2;
}
ret = regmap_read(regmap, reg, &val);
if (ret)
return ret;
return ((val >> bit) & mask);
}
/*
* Set a new mux function for a pin.
*
* The register is divided into the upper and lower 16 bit. When changing
* a value, the previous register value is not read and changed. Instead
* it seems the changed bits are marked in the upper 16 bit, while the
* changed value gets set in the same offset in the lower 16 bit.
* All pin settings seem to be 2 bit wide in both the upper and lower
* parts.
* @bank: pin bank to change
* @pin: pin to change
* @mux: new mux function to set
*/
static int rockchip_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
{
struct rockchip_pinctrl *info = bank->drvdata;
int iomux_num = (pin / 8);
struct regmap *regmap;
int reg, ret, mask;
unsigned long flags;
u8 bit;
u32 data, rmask;
if (iomux_num > 3)
return -EINVAL;
if (bank->iomux[iomux_num].type & IOMUX_UNROUTED) {
dev_err(info->dev, "pin %d is unrouted\n", pin);
return -EINVAL;
}
if (bank->iomux[iomux_num].type & IOMUX_GPIO_ONLY) {
if (mux != RK_FUNC_GPIO) {
dev_err(info->dev,
"pin %d only supports a gpio mux\n", pin);
return -ENOTSUPP;
} else {
return 0;
}
}
dev_dbg(info->dev, "setting mux of GPIO%d-%d to %d\n",
bank->bank_num, pin, mux);
regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
? info->regmap_pmu : info->regmap_base;
/* get basic quadrupel of mux registers and the correct reg inside */
mask = (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) ? 0xf : 0x3;
reg = bank->iomux[iomux_num].offset;
if (bank->iomux[iomux_num].type & IOMUX_WIDTH_4BIT) {
if ((pin % 8) >= 4)
reg += 0x4;
bit = (pin % 4) * 4;
} else {
bit = (pin % 8) * 2;
}
spin_lock_irqsave(&bank->slock, flags);
data = (mask << (bit + 16));
rmask = data | (data >> 16);
data |= (mux & mask) << bit;
ret = regmap_update_bits(regmap, reg, rmask, data);
spin_unlock_irqrestore(&bank->slock, flags);
return ret;
}
#define RK2928_PULL_OFFSET 0x118
#define RK2928_PULL_PINS_PER_REG 16
#define RK2928_PULL_BANK_STRIDE 8
static void rk2928_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
*regmap = info->regmap_base;
*reg = RK2928_PULL_OFFSET;
*reg += bank->bank_num * RK2928_PULL_BANK_STRIDE;
*reg += (pin_num / RK2928_PULL_PINS_PER_REG) * 4;
*bit = pin_num % RK2928_PULL_PINS_PER_REG;
};
#define RK3188_PULL_OFFSET 0x164
#define RK3188_PULL_BITS_PER_PIN 2
#define RK3188_PULL_PINS_PER_REG 8
#define RK3188_PULL_BANK_STRIDE 16
#define RK3188_PULL_PMU_OFFSET 0x64
static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The first 12 pins of the first bank are located elsewhere */
if (bank->bank_num == 0 && pin_num < 12) {
*regmap = info->regmap_pmu ? info->regmap_pmu
: bank->regmap_pull;
*reg = info->regmap_pmu ? RK3188_PULL_PMU_OFFSET : 0;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = pin_num % RK3188_PULL_PINS_PER_REG;
*bit *= RK3188_PULL_BITS_PER_PIN;
} else {
*regmap = info->regmap_pull ? info->regmap_pull
: info->regmap_base;
*reg = info->regmap_pull ? 0 : RK3188_PULL_OFFSET;
/* correct the offset, as it is the 2nd pull register */
*reg -= 4;
*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
/*
* The bits in these registers have an inverse ordering
* with the lowest pin being in bits 15:14 and the highest
* pin in bits 1:0
*/
*bit = 7 - (pin_num % RK3188_PULL_PINS_PER_REG);
*bit *= RK3188_PULL_BITS_PER_PIN;
}
}
#define RK3288_PULL_OFFSET 0x140
static void rk3288_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The first 24 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = info->regmap_pmu;
*reg = RK3188_PULL_PMU_OFFSET;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = pin_num % RK3188_PULL_PINS_PER_REG;
*bit *= RK3188_PULL_BITS_PER_PIN;
} else {
*regmap = info->regmap_base;
*reg = RK3288_PULL_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = (pin_num % RK3188_PULL_PINS_PER_REG);
*bit *= RK3188_PULL_BITS_PER_PIN;
}
}
#define RK3288_DRV_PMU_OFFSET 0x70
#define RK3288_DRV_GRF_OFFSET 0x1c0
#define RK3288_DRV_BITS_PER_PIN 2
#define RK3288_DRV_PINS_PER_REG 8
#define RK3288_DRV_BANK_STRIDE 16
static void rk3288_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The first 24 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = info->regmap_pmu;
*reg = RK3288_DRV_PMU_OFFSET;
*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
*bit = pin_num % RK3288_DRV_PINS_PER_REG;
*bit *= RK3288_DRV_BITS_PER_PIN;
} else {
*regmap = info->regmap_base;
*reg = RK3288_DRV_GRF_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
*bit = (pin_num % RK3288_DRV_PINS_PER_REG);
*bit *= RK3288_DRV_BITS_PER_PIN;
}
}
#define RK3368_PULL_GRF_OFFSET 0x100
#define RK3368_PULL_PMU_OFFSET 0x10
static void rk3368_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The first 32 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = info->regmap_pmu;
*reg = RK3368_PULL_PMU_OFFSET;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = pin_num % RK3188_PULL_PINS_PER_REG;
*bit *= RK3188_PULL_BITS_PER_PIN;
} else {
*regmap = info->regmap_base;
*reg = RK3368_PULL_GRF_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * RK3188_PULL_BANK_STRIDE;
*reg += ((pin_num / RK3188_PULL_PINS_PER_REG) * 4);
*bit = (pin_num % RK3188_PULL_PINS_PER_REG);
*bit *= RK3188_PULL_BITS_PER_PIN;
}
}
#define RK3368_DRV_PMU_OFFSET 0x20
#define RK3368_DRV_GRF_OFFSET 0x200
static void rk3368_calc_drv_reg_and_bit(struct rockchip_pin_bank *bank,
int pin_num, struct regmap **regmap,
int *reg, u8 *bit)
{
struct rockchip_pinctrl *info = bank->drvdata;
/* The first 32 pins of the first bank are located in PMU */
if (bank->bank_num == 0) {
*regmap = info->regmap_pmu;
*reg = RK3368_DRV_PMU_OFFSET;
*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
*bit = pin_num % RK3288_DRV_PINS_PER_REG;
*bit *= RK3288_DRV_BITS_PER_PIN;
} else {
*regmap = info->regmap_base;
*reg = RK3368_DRV_GRF_OFFSET;
/* correct the offset, as we're starting with the 2nd bank */
*reg -= 0x10;
*reg += bank->bank_num * RK3288_DRV_BANK_STRIDE;
*reg += ((pin_num / RK3288_DRV_PINS_PER_REG) * 4);
*bit = (pin_num % RK3288_DRV_PINS_PER_REG);
*bit *= RK3288_DRV_BITS_PER_PIN;
}
}
static int rockchip_perpin_drv_list[] = { 2, 4, 8, 12 };
static int rockchip_get_drive_perpin(struct rockchip_pin_bank *bank,
int pin_num)
{
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
int reg, ret;
u32 data;
u8 bit;
ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
ret = regmap_read(regmap, reg, &data);
if (ret)
return ret;
data >>= bit;
data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1;
return rockchip_perpin_drv_list[data];
}
static int rockchip_set_drive_perpin(struct rockchip_pin_bank *bank,
int pin_num, int strength)
{
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
unsigned long flags;
int reg, ret, i;
u32 data, rmask;
u8 bit;
ctrl->drv_calc_reg(bank, pin_num, &regmap, &reg, &bit);
ret = -EINVAL;
for (i = 0; i < ARRAY_SIZE(rockchip_perpin_drv_list); i++) {
if (rockchip_perpin_drv_list[i] == strength) {
ret = i;
break;
}
}
if (ret < 0) {
dev_err(info->dev, "unsupported driver strength %d\n",
strength);
return ret;
}
spin_lock_irqsave(&bank->slock, flags);
/* enable the write to the equivalent lower bits */
data = ((1 << RK3288_DRV_BITS_PER_PIN) - 1) << (bit + 16);
rmask = data | (data >> 16);
data |= (ret << bit);
ret = regmap_update_bits(regmap, reg, rmask, data);
spin_unlock_irqrestore(&bank->slock, flags);
return ret;
}
static int rockchip_get_pull(struct rockchip_pin_bank *bank, int pin_num)
{
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
int reg, ret;
u8 bit;
u32 data;
/* rk3066b does support any pulls */
if (ctrl->type == RK3066B)
return PIN_CONFIG_BIAS_DISABLE;
ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
ret = regmap_read(regmap, reg, &data);
if (ret)
return ret;
switch (ctrl->type) {
case RK2928:
return !(data & BIT(bit))
? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT
: PIN_CONFIG_BIAS_DISABLE;
case RK3188:
case RK3288:
case RK3368:
data >>= bit;
data &= (1 << RK3188_PULL_BITS_PER_PIN) - 1;
switch (data) {
case 0:
return PIN_CONFIG_BIAS_DISABLE;
case 1:
return PIN_CONFIG_BIAS_PULL_UP;
case 2:
return PIN_CONFIG_BIAS_PULL_DOWN;
case 3:
return PIN_CONFIG_BIAS_BUS_HOLD;
}
dev_err(info->dev, "unknown pull setting\n");
return -EIO;
default:
dev_err(info->dev, "unsupported pinctrl type\n");
return -EINVAL;
};
}
static int rockchip_set_pull(struct rockchip_pin_bank *bank,
int pin_num, int pull)
{
struct rockchip_pinctrl *info = bank->drvdata;
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct regmap *regmap;
int reg, ret;
unsigned long flags;
u8 bit;
u32 data, rmask;
dev_dbg(info->dev, "setting pull of GPIO%d-%d to %d\n",
bank->bank_num, pin_num, pull);
/* rk3066b does support any pulls */
if (ctrl->type == RK3066B)
return pull ? -EINVAL : 0;
ctrl->pull_calc_reg(bank, pin_num, &regmap, &reg, &bit);
switch (ctrl->type) {
case RK2928:
spin_lock_irqsave(&bank->slock, flags);
data = BIT(bit + 16);
if (pull == PIN_CONFIG_BIAS_DISABLE)
data |= BIT(bit);
ret = regmap_write(regmap, reg, data);
spin_unlock_irqrestore(&bank->slock, flags);
break;
case RK3188:
case RK3288:
case RK3368:
spin_lock_irqsave(&bank->slock, flags);
/* enable the write to the equivalent lower bits */
data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 16);
rmask = data | (data >> 16);
switch (pull) {
case PIN_CONFIG_BIAS_DISABLE:
break;
case PIN_CONFIG_BIAS_PULL_UP:
data |= (1 << bit);
break;
case PIN_CONFIG_BIAS_PULL_DOWN:
data |= (2 << bit);
break;
case PIN_CONFIG_BIAS_BUS_HOLD:
data |= (3 << bit);
break;
default:
spin_unlock_irqrestore(&bank->slock, flags);
dev_err(info->dev, "unsupported pull setting %d\n",
pull);
return -EINVAL;
}
ret = regmap_update_bits(regmap, reg, rmask, data);
spin_unlock_irqrestore(&bank->slock, flags);
break;
default:
dev_err(info->dev, "unsupported pinctrl type\n");
return -EINVAL;
}
return ret;
}
/*
* Pinmux_ops handling
*/
static int rockchip_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->nfunctions;
}
static const char *rockchip_pmx_get_func_name(struct pinctrl_dev *pctldev,
unsigned selector)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
return info->functions[selector].name;
}
static int rockchip_pmx_get_groups(struct pinctrl_dev *pctldev,
unsigned selector, const char * const **groups,
unsigned * const num_groups)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
*groups = info->functions[selector].groups;
*num_groups = info->functions[selector].ngroups;
return 0;
}
static int rockchip_pmx_set(struct pinctrl_dev *pctldev, unsigned selector,
unsigned group)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
const unsigned int *pins = info->groups[group].pins;
const struct rockchip_pin_config *data = info->groups[group].data;
struct rockchip_pin_bank *bank;
int cnt, ret = 0;
dev_dbg(info->dev, "enable function %s group %s\n",
info->functions[selector].name, info->groups[group].name);
/*
* for each pin in the pin group selected, program the correspoding pin
* pin function number in the config register.
*/
for (cnt = 0; cnt < info->groups[group].npins; cnt++) {
bank = pin_to_bank(info, pins[cnt]);
ret = rockchip_set_mux(bank, pins[cnt] - bank->pin_base,
data[cnt].func);
if (ret)
break;
}
if (ret) {
/* revert the already done pin settings */
for (cnt--; cnt >= 0; cnt--)
rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 0);
return ret;
}
return 0;
}
/*
* The calls to gpio_direction_output() and gpio_direction_input()
* leads to this function call (via the pinctrl_gpio_direction_{input|output}()
* function called from the gpiolib interface).
*/
static int _rockchip_pmx_gpio_set_direction(struct gpio_chip *chip,
int pin, bool input)
{
struct rockchip_pin_bank *bank;
int ret;
unsigned long flags;
u32 data;
bank = gpiochip_get_data(chip);
ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO);
if (ret < 0)
return ret;
clk_enable(bank->clk);
spin_lock_irqsave(&bank->slock, flags);
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
/* set bit to 1 for output, 0 for input */
if (!input)
data |= BIT(pin);
else
data &= ~BIT(pin);
writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
spin_unlock_irqrestore(&bank->slock, flags);
clk_disable(bank->clk);
return 0;
}
static int rockchip_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset, bool input)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct gpio_chip *chip;
int pin;
chip = range->gc;
pin = offset - chip->base;
dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n",
offset, range->name, pin, input ? "input" : "output");
return _rockchip_pmx_gpio_set_direction(chip, offset - chip->base,
input);
}
static const struct pinmux_ops rockchip_pmx_ops = {
.get_functions_count = rockchip_pmx_get_funcs_count,
.get_function_name = rockchip_pmx_get_func_name,
.get_function_groups = rockchip_pmx_get_groups,
.set_mux = rockchip_pmx_set,
.gpio_set_direction = rockchip_pmx_gpio_set_direction,
};
/*
* Pinconf_ops handling
*/
static bool rockchip_pinconf_pull_valid(struct rockchip_pin_ctrl *ctrl,
enum pin_config_param pull)
{
switch (ctrl->type) {
case RK2928:
return (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT ||
pull == PIN_CONFIG_BIAS_DISABLE);
case RK3066B:
return pull ? false : true;
case RK3188:
case RK3288:
case RK3368:
return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT);
}
return false;
}
static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value);
static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset);
/* set the pin config settings for a specified pin */
static int rockchip_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *configs, unsigned num_configs)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
enum pin_config_param param;
u16 arg;
int i;
int rc;
for (i = 0; i < num_configs; i++) {
param = pinconf_to_config_param(configs[i]);
arg = pinconf_to_config_argument(configs[i]);
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
rc = rockchip_set_pull(bank, pin - bank->pin_base,
param);
if (rc)
return rc;
break;
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
case PIN_CONFIG_BIAS_BUS_HOLD:
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
return -ENOTSUPP;
if (!arg)
return -EINVAL;
rc = rockchip_set_pull(bank, pin - bank->pin_base,
param);
if (rc)
return rc;
break;
case PIN_CONFIG_OUTPUT:
rockchip_gpio_set(&bank->gpio_chip,
pin - bank->pin_base, arg);
rc = _rockchip_pmx_gpio_set_direction(&bank->gpio_chip,
pin - bank->pin_base, false);
if (rc)
return rc;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
/* rk3288 is the first with per-pin drive-strength */
if (!info->ctrl->drv_calc_reg)
return -ENOTSUPP;
rc = rockchip_set_drive_perpin(bank,
pin - bank->pin_base, arg);
if (rc < 0)
return rc;
break;
default:
return -ENOTSUPP;
break;
}
} /* for each config */
return 0;
}
/* get the pin config settings for a specified pin */
static int rockchip_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin,
unsigned long *config)
{
struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
struct rockchip_pin_bank *bank = pin_to_bank(info, pin);
enum pin_config_param param = pinconf_to_config_param(*config);
u16 arg;
int rc;
switch (param) {
case PIN_CONFIG_BIAS_DISABLE:
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
return -EINVAL;
arg = 0;
break;
case PIN_CONFIG_BIAS_PULL_UP:
case PIN_CONFIG_BIAS_PULL_DOWN:
case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
case PIN_CONFIG_BIAS_BUS_HOLD:
if (!rockchip_pinconf_pull_valid(info->ctrl, param))
return -ENOTSUPP;
if (rockchip_get_pull(bank, pin - bank->pin_base) != param)
return -EINVAL;
arg = 1;
break;
case PIN_CONFIG_OUTPUT:
rc = rockchip_get_mux(bank, pin - bank->pin_base);
if (rc != RK_FUNC_GPIO)
return -EINVAL;
rc = rockchip_gpio_get(&bank->gpio_chip, pin - bank->pin_base);
if (rc < 0)
return rc;
arg = rc ? 1 : 0;
break;
case PIN_CONFIG_DRIVE_STRENGTH:
/* rk3288 is the first with per-pin drive-strength */
if (!info->ctrl->drv_calc_reg)
return -ENOTSUPP;
rc = rockchip_get_drive_perpin(bank, pin - bank->pin_base);
if (rc < 0)
return rc;
arg = rc;
break;
default:
return -ENOTSUPP;
break;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static const struct pinconf_ops rockchip_pinconf_ops = {
.pin_config_get = rockchip_pinconf_get,
.pin_config_set = rockchip_pinconf_set,
.is_generic = true,
};
static const struct of_device_id rockchip_bank_match[] = {
{ .compatible = "rockchip,gpio-bank" },
{ .compatible = "rockchip,rk3188-gpio-bank0" },
{},
};
static void rockchip_pinctrl_child_count(struct rockchip_pinctrl *info,
struct device_node *np)
{
struct device_node *child;
for_each_child_of_node(np, child) {
if (of_match_node(rockchip_bank_match, child))
continue;
info->nfunctions++;
info->ngroups += of_get_child_count(child);
}
}
static int rockchip_pinctrl_parse_groups(struct device_node *np,
struct rockchip_pin_group *grp,
struct rockchip_pinctrl *info,
u32 index)
{
struct rockchip_pin_bank *bank;
int size;
const __be32 *list;
int num;
int i, j;
int ret;
dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
/* Initialise group */
grp->name = np->name;
/*
* the binding format is rockchip,pins = <bank pin mux CONFIG>,
* do sanity check and calculate pins number
*/
list = of_get_property(np, "rockchip,pins", &size);
/* we do not check return since it's safe node passed down */
size /= sizeof(*list);
if (!size || size % 4) {
dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
return -EINVAL;
}
grp->npins = size / 4;
grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
GFP_KERNEL);
grp->data = devm_kzalloc(info->dev, grp->npins *
sizeof(struct rockchip_pin_config),
GFP_KERNEL);
if (!grp->pins || !grp->data)
return -ENOMEM;
for (i = 0, j = 0; i < size; i += 4, j++) {
const __be32 *phandle;
struct device_node *np_config;
num = be32_to_cpu(*list++);
bank = bank_num_to_bank(info, num);
if (IS_ERR(bank))
return PTR_ERR(bank);
grp->pins[j] = bank->pin_base + be32_to_cpu(*list++);
grp->data[j].func = be32_to_cpu(*list++);
phandle = list++;
if (!phandle)
return -EINVAL;
np_config = of_find_node_by_phandle(be32_to_cpup(phandle));
ret = pinconf_generic_parse_dt_config(np_config, NULL,
&grp->data[j].configs, &grp->data[j].nconfigs);
if (ret)
return ret;
}
return 0;
}
static int rockchip_pinctrl_parse_functions(struct device_node *np,
struct rockchip_pinctrl *info,
u32 index)
{
struct device_node *child;
struct rockchip_pmx_func *func;
struct rockchip_pin_group *grp;
int ret;
static u32 grp_index;
u32 i = 0;
dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
func = &info->functions[index];
/* Initialise function */
func->name = np->name;
func->ngroups = of_get_child_count(np);
if (func->ngroups <= 0)
return 0;
func->groups = devm_kzalloc(info->dev,
func->ngroups * sizeof(char *), GFP_KERNEL);
if (!func->groups)
return -ENOMEM;
for_each_child_of_node(np, child) {
func->groups[i] = child->name;
grp = &info->groups[grp_index++];
ret = rockchip_pinctrl_parse_groups(child, grp, info, i++);
if (ret)
return ret;
}
return 0;
}
static int rockchip_pinctrl_parse_dt(struct platform_device *pdev,
struct rockchip_pinctrl *info)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct device_node *child;
int ret;
int i;
rockchip_pinctrl_child_count(info, np);
dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
info->functions = devm_kzalloc(dev, info->nfunctions *
sizeof(struct rockchip_pmx_func),
GFP_KERNEL);
if (!info->functions) {
dev_err(dev, "failed to allocate memory for function list\n");
return -EINVAL;
}
info->groups = devm_kzalloc(dev, info->ngroups *
sizeof(struct rockchip_pin_group),
GFP_KERNEL);
if (!info->groups) {
dev_err(dev, "failed allocate memory for ping group list\n");
return -EINVAL;
}
i = 0;
for_each_child_of_node(np, child) {
if (of_match_node(rockchip_bank_match, child))
continue;
ret = rockchip_pinctrl_parse_functions(child, info, i++);
if (ret) {
dev_err(&pdev->dev, "failed to parse function\n");
return ret;
}
}
return 0;
}
static int rockchip_pinctrl_register(struct platform_device *pdev,
struct rockchip_pinctrl *info)
{
struct pinctrl_desc *ctrldesc = &info->pctl;
struct pinctrl_pin_desc *pindesc, *pdesc;
struct rockchip_pin_bank *pin_bank;
int pin, bank, ret;
int k;
ctrldesc->name = "rockchip-pinctrl";
ctrldesc->owner = THIS_MODULE;
ctrldesc->pctlops = &rockchip_pctrl_ops;
ctrldesc->pmxops = &rockchip_pmx_ops;
ctrldesc->confops = &rockchip_pinconf_ops;
pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) *
info->ctrl->nr_pins, GFP_KERNEL);
if (!pindesc) {
dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n");
return -ENOMEM;
}
ctrldesc->pins = pindesc;
ctrldesc->npins = info->ctrl->nr_pins;
pdesc = pindesc;
for (bank = 0 , k = 0; bank < info->ctrl->nr_banks; bank++) {
pin_bank = &info->ctrl->pin_banks[bank];
for (pin = 0; pin < pin_bank->nr_pins; pin++, k++) {
pdesc->number = k;
pdesc->name = kasprintf(GFP_KERNEL, "%s-%d",
pin_bank->name, pin);
pdesc++;
}
}
ret = rockchip_pinctrl_parse_dt(pdev, info);
if (ret)
return ret;
info->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, info);
if (IS_ERR(info->pctl_dev)) {
dev_err(&pdev->dev, "could not register pinctrl driver\n");
return PTR_ERR(info->pctl_dev);
}
for (bank = 0; bank < info->ctrl->nr_banks; ++bank) {
pin_bank = &info->ctrl->pin_banks[bank];
pin_bank->grange.name = pin_bank->name;
pin_bank->grange.id = bank;
pin_bank->grange.pin_base = pin_bank->pin_base;
pin_bank->grange.base = pin_bank->gpio_chip.base;
pin_bank->grange.npins = pin_bank->gpio_chip.ngpio;
pin_bank->grange.gc = &pin_bank->gpio_chip;
pinctrl_add_gpio_range(info->pctl_dev, &pin_bank->grange);
}
return 0;
}
/*
* GPIO handling
*/
static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR;
unsigned long flags;
u32 data;
clk_enable(bank->clk);
spin_lock_irqsave(&bank->slock, flags);
data = readl(reg);
data &= ~BIT(offset);
if (value)
data |= BIT(offset);
writel(data, reg);
spin_unlock_irqrestore(&bank->slock, flags);
clk_disable(bank->clk);
}
/*
* Returns the level of the pin for input direction and setting of the DR
* register for output gpios.
*/
static int rockchip_gpio_get(struct gpio_chip *gc, unsigned offset)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
u32 data;
clk_enable(bank->clk);
data = readl(bank->reg_base + GPIO_EXT_PORT);
clk_disable(bank->clk);
data >>= offset;
data &= 1;
return data;
}
/*
* gpiolib gpio_direction_input callback function. The setting of the pin
* mux function as 'gpio input' will be handled by the pinctrl susbsystem
* interface.
*/
static int rockchip_gpio_direction_input(struct gpio_chip *gc, unsigned offset)
{
return pinctrl_gpio_direction_input(gc->base + offset);
}
/*
* gpiolib gpio_direction_output callback function. The setting of the pin
* mux function as 'gpio output' will be handled by the pinctrl susbsystem
* interface.
*/
static int rockchip_gpio_direction_output(struct gpio_chip *gc,
unsigned offset, int value)
{
rockchip_gpio_set(gc, offset, value);
return pinctrl_gpio_direction_output(gc->base + offset);
}
/*
* gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin
* and a virtual IRQ, if not already present.
*/
static int rockchip_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct rockchip_pin_bank *bank = gpiochip_get_data(gc);
unsigned int virq;
if (!bank->domain)
return -ENXIO;
virq = irq_create_mapping(bank->domain, offset);
return (virq) ? : -ENXIO;
}
static const struct gpio_chip rockchip_gpiolib_chip = {
.request = gpiochip_generic_request,
.free = gpiochip_generic_free,
.set = rockchip_gpio_set,
.get = rockchip_gpio_get,
.direction_input = rockchip_gpio_direction_input,
.direction_output = rockchip_gpio_direction_output,
.to_irq = rockchip_gpio_to_irq,
.owner = THIS_MODULE,
};
/*
* Interrupt handling
*/
static void rockchip_irq_demux(struct irq_desc *desc)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct rockchip_pin_bank *bank = irq_desc_get_handler_data(desc);
u32 pend;
dev_dbg(bank->drvdata->dev, "got irq for bank %s\n", bank->name);
chained_irq_enter(chip, desc);
pend = readl_relaxed(bank->reg_base + GPIO_INT_STATUS);
while (pend) {
unsigned int irq, virq;
irq = __ffs(pend);
pend &= ~BIT(irq);
virq = irq_linear_revmap(bank->domain, irq);
if (!virq) {
dev_err(bank->drvdata->dev, "unmapped irq %d\n", irq);
continue;
}
dev_dbg(bank->drvdata->dev, "handling irq %d\n", irq);
/*
* Triggering IRQ on both rising and falling edge
* needs manual intervention.
*/
if (bank->toggle_edge_mode & BIT(irq)) {
u32 data, data_old, polarity;
unsigned long flags;
data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT);
do {
spin_lock_irqsave(&bank->slock, flags);
polarity = readl_relaxed(bank->reg_base +
GPIO_INT_POLARITY);
if (data & BIT(irq))
polarity &= ~BIT(irq);
else
polarity |= BIT(irq);
writel(polarity,
bank->reg_base + GPIO_INT_POLARITY);
spin_unlock_irqrestore(&bank->slock, flags);
data_old = data;
data = readl_relaxed(bank->reg_base +
GPIO_EXT_PORT);
} while ((data & BIT(irq)) != (data_old & BIT(irq)));
}
generic_handle_irq(virq);
}
chained_irq_exit(chip, desc);
}
static int rockchip_irq_set_type(struct irq_data *d, unsigned int type)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct rockchip_pin_bank *bank = gc->private;
u32 mask = BIT(d->hwirq);
u32 polarity;
u32 level;
u32 data;
unsigned long flags;
int ret;
/* make sure the pin is configured as gpio input */
ret = rockchip_set_mux(bank, d->hwirq, RK_FUNC_GPIO);
if (ret < 0)
return ret;
clk_enable(bank->clk);
spin_lock_irqsave(&bank->slock, flags);
data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR);
data &= ~mask;
writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR);
spin_unlock_irqrestore(&bank->slock, flags);
if (type & IRQ_TYPE_EDGE_BOTH)
irq_set_handler_locked(d, handle_edge_irq);
else
irq_set_handler_locked(d, handle_level_irq);
spin_lock_irqsave(&bank->slock, flags);
irq_gc_lock(gc);
level = readl_relaxed(gc->reg_base + GPIO_INTTYPE_LEVEL);
polarity = readl_relaxed(gc->reg_base + GPIO_INT_POLARITY);
switch (type) {
case IRQ_TYPE_EDGE_BOTH:
bank->toggle_edge_mode |= mask;
level |= mask;
/*
* Determine gpio state. If 1 next interrupt should be falling
* otherwise rising.
*/
data = readl(bank->reg_base + GPIO_EXT_PORT);
if (data & mask)
polarity &= ~mask;
else
polarity |= mask;
break;
case IRQ_TYPE_EDGE_RISING:
bank->toggle_edge_mode &= ~mask;
level |= mask;
polarity |= mask;
break;
case IRQ_TYPE_EDGE_FALLING:
bank->toggle_edge_mode &= ~mask;
level |= mask;
polarity &= ~mask;
break;
case IRQ_TYPE_LEVEL_HIGH:
bank->toggle_edge_mode &= ~mask;
level &= ~mask;
polarity |= mask;
break;
case IRQ_TYPE_LEVEL_LOW:
bank->toggle_edge_mode &= ~mask;
level &= ~mask;
polarity &= ~mask;
break;
default:
irq_gc_unlock(gc);
spin_unlock_irqrestore(&bank->slock, flags);
clk_disable(bank->clk);
return -EINVAL;
}
writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL);
writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY);
irq_gc_unlock(gc);
spin_unlock_irqrestore(&bank->slock, flags);
clk_disable(bank->clk);
return 0;
}
static void rockchip_irq_suspend(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct rockchip_pin_bank *bank = gc->private;
clk_enable(bank->clk);
bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK);
irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK);
clk_disable(bank->clk);
}
static void rockchip_irq_resume(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct rockchip_pin_bank *bank = gc->private;
clk_enable(bank->clk);
irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK);
clk_disable(bank->clk);
}
static void rockchip_irq_gc_mask_clr_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct rockchip_pin_bank *bank = gc->private;
clk_enable(bank->clk);
irq_gc_mask_clr_bit(d);
}
void rockchip_irq_gc_mask_set_bit(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct rockchip_pin_bank *bank = gc->private;
irq_gc_mask_set_bit(d);
clk_disable(bank->clk);
}
static int rockchip_interrupts_register(struct platform_device *pdev,
struct rockchip_pinctrl *info)
{
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct rockchip_pin_bank *bank = ctrl->pin_banks;
unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
struct irq_chip_generic *gc;
int ret;
int i, j;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
if (!bank->valid) {
dev_warn(&pdev->dev, "bank %s is not valid\n",
bank->name);
continue;
}
ret = clk_enable(bank->clk);
if (ret) {
dev_err(&pdev->dev, "failed to enable clock for bank %s\n",
bank->name);
continue;
}
bank->domain = irq_domain_add_linear(bank->of_node, 32,
&irq_generic_chip_ops, NULL);
if (!bank->domain) {
dev_warn(&pdev->dev, "could not initialize irq domain for bank %s\n",
bank->name);
clk_disable(bank->clk);
continue;
}
ret = irq_alloc_domain_generic_chips(bank->domain, 32, 1,
"rockchip_gpio_irq", handle_level_irq,
clr, 0, IRQ_GC_INIT_MASK_CACHE);
if (ret) {
dev_err(&pdev->dev, "could not alloc generic chips for bank %s\n",
bank->name);
irq_domain_remove(bank->domain);
clk_disable(bank->clk);
continue;
}
/*
* Linux assumes that all interrupts start out disabled/masked.
* Our driver only uses the concept of masked and always keeps
* things enabled, so for us that's all masked and all enabled.
*/
writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTMASK);
writel_relaxed(0xffffffff, bank->reg_base + GPIO_INTEN);
gc = irq_get_domain_generic_chip(bank->domain, 0);
gc->reg_base = bank->reg_base;
gc->private = bank;
gc->chip_types[0].regs.mask = GPIO_INTMASK;
gc->chip_types[0].regs.ack = GPIO_PORTS_EOI;
gc->chip_types[0].chip.irq_ack = irq_gc_ack_set_bit;
gc->chip_types[0].chip.irq_mask = rockchip_irq_gc_mask_set_bit;
gc->chip_types[0].chip.irq_unmask =
rockchip_irq_gc_mask_clr_bit;
gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake;
gc->chip_types[0].chip.irq_suspend = rockchip_irq_suspend;
gc->chip_types[0].chip.irq_resume = rockchip_irq_resume;
gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type;
gc->wake_enabled = IRQ_MSK(bank->nr_pins);
irq_set_chained_handler_and_data(bank->irq,
rockchip_irq_demux, bank);
/* map the gpio irqs here, when the clock is still running */
for (j = 0 ; j < 32 ; j++)
irq_create_mapping(bank->domain, j);
clk_disable(bank->clk);
}
return 0;
}
static int rockchip_gpiolib_register(struct platform_device *pdev,
struct rockchip_pinctrl *info)
{
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct rockchip_pin_bank *bank = ctrl->pin_banks;
struct gpio_chip *gc;
int ret;
int i;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
if (!bank->valid) {
dev_warn(&pdev->dev, "bank %s is not valid\n",
bank->name);
continue;
}
bank->gpio_chip = rockchip_gpiolib_chip;
gc = &bank->gpio_chip;
gc->base = bank->pin_base;
gc->ngpio = bank->nr_pins;
gc->parent = &pdev->dev;
gc->of_node = bank->of_node;
gc->label = bank->name;
ret = gpiochip_add_data(gc, bank);
if (ret) {
dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n",
gc->label, ret);
goto fail;
}
}
rockchip_interrupts_register(pdev, info);
return 0;
fail:
for (--i, --bank; i >= 0; --i, --bank) {
if (!bank->valid)
continue;
gpiochip_remove(&bank->gpio_chip);
}
return ret;
}
static int rockchip_gpiolib_unregister(struct platform_device *pdev,
struct rockchip_pinctrl *info)
{
struct rockchip_pin_ctrl *ctrl = info->ctrl;
struct rockchip_pin_bank *bank = ctrl->pin_banks;
int i;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
if (!bank->valid)
continue;
gpiochip_remove(&bank->gpio_chip);
}
return 0;
}
static int rockchip_get_bank_data(struct rockchip_pin_bank *bank,
struct rockchip_pinctrl *info)
{
struct resource res;
void __iomem *base;
if (of_address_to_resource(bank->of_node, 0, &res)) {
dev_err(info->dev, "cannot find IO resource for bank\n");
return -ENOENT;
}
bank->reg_base = devm_ioremap_resource(info->dev, &res);
if (IS_ERR(bank->reg_base))
return PTR_ERR(bank->reg_base);
/*
* special case, where parts of the pull setting-registers are
* part of the PMU register space
*/
if (of_device_is_compatible(bank->of_node,
"rockchip,rk3188-gpio-bank0")) {
struct device_node *node;
node = of_parse_phandle(bank->of_node->parent,
"rockchip,pmu", 0);
if (!node) {
if (of_address_to_resource(bank->of_node, 1, &res)) {
dev_err(info->dev, "cannot find IO resource for bank\n");
return -ENOENT;
}
base = devm_ioremap_resource(info->dev, &res);
if (IS_ERR(base))
return PTR_ERR(base);
rockchip_regmap_config.max_register =
resource_size(&res) - 4;
rockchip_regmap_config.name =
"rockchip,rk3188-gpio-bank0-pull";
bank->regmap_pull = devm_regmap_init_mmio(info->dev,
base,
&rockchip_regmap_config);
}
}
bank->irq = irq_of_parse_and_map(bank->of_node, 0);
bank->clk = of_clk_get(bank->of_node, 0);
if (IS_ERR(bank->clk))
return PTR_ERR(bank->clk);
return clk_prepare(bank->clk);
}
static const struct of_device_id rockchip_pinctrl_dt_match[];
/* retrieve the soc specific data */
static struct rockchip_pin_ctrl *rockchip_pinctrl_get_soc_data(
struct rockchip_pinctrl *d,
struct platform_device *pdev)
{
const struct of_device_id *match;
struct device_node *node = pdev->dev.of_node;
struct device_node *np;
struct rockchip_pin_ctrl *ctrl;
struct rockchip_pin_bank *bank;
int grf_offs, pmu_offs, i, j;
match = of_match_node(rockchip_pinctrl_dt_match, node);
ctrl = (struct rockchip_pin_ctrl *)match->data;
for_each_child_of_node(node, np) {
if (!of_find_property(np, "gpio-controller", NULL))
continue;
bank = ctrl->pin_banks;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
if (!strcmp(bank->name, np->name)) {
bank->of_node = np;
if (!rockchip_get_bank_data(bank, d))
bank->valid = true;
break;
}
}
}
grf_offs = ctrl->grf_mux_offset;
pmu_offs = ctrl->pmu_mux_offset;
bank = ctrl->pin_banks;
for (i = 0; i < ctrl->nr_banks; ++i, ++bank) {
int bank_pins = 0;
spin_lock_init(&bank->slock);
bank->drvdata = d;
bank->pin_base = ctrl->nr_pins;
ctrl->nr_pins += bank->nr_pins;
/* calculate iomux offsets */
for (j = 0; j < 4; j++) {
struct rockchip_iomux *iom = &bank->iomux[j];
int inc;
if (bank_pins >= bank->nr_pins)
break;
/* preset offset value, set new start value */
if (iom->offset >= 0) {
if (iom->type & IOMUX_SOURCE_PMU)
pmu_offs = iom->offset;
else
grf_offs = iom->offset;
} else { /* set current offset */
iom->offset = (iom->type & IOMUX_SOURCE_PMU) ?
pmu_offs : grf_offs;
}
dev_dbg(d->dev, "bank %d, iomux %d has offset 0x%x\n",
i, j, iom->offset);
/*
* Increase offset according to iomux width.
* 4bit iomux'es are spread over two registers.
*/
inc = (iom->type & IOMUX_WIDTH_4BIT) ? 8 : 4;
if (iom->type & IOMUX_SOURCE_PMU)
pmu_offs += inc;
else
grf_offs += inc;
bank_pins += 8;
}
}
return ctrl;
}
#define RK3288_GRF_GPIO6C_IOMUX 0x64
#define GPIO6C6_SEL_WRITE_ENABLE BIT(28)
static u32 rk3288_grf_gpio6c_iomux;
static int __maybe_unused rockchip_pinctrl_suspend(struct device *dev)
{
struct rockchip_pinctrl *info = dev_get_drvdata(dev);
int ret = pinctrl_force_sleep(info->pctl_dev);
if (ret)
return ret;
/*
* RK3288 GPIO6_C6 mux would be modified by Maskrom when resume, so save
* the setting here, and restore it at resume.
*/
if (info->ctrl->type == RK3288) {
ret = regmap_read(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
&rk3288_grf_gpio6c_iomux);
if (ret) {
pinctrl_force_default(info->pctl_dev);
return ret;
}
}
return 0;
}
static int __maybe_unused rockchip_pinctrl_resume(struct device *dev)
{
struct rockchip_pinctrl *info = dev_get_drvdata(dev);
int ret = regmap_write(info->regmap_base, RK3288_GRF_GPIO6C_IOMUX,
rk3288_grf_gpio6c_iomux |
GPIO6C6_SEL_WRITE_ENABLE);
if (ret)
return ret;
return pinctrl_force_default(info->pctl_dev);
}
static SIMPLE_DEV_PM_OPS(rockchip_pinctrl_dev_pm_ops, rockchip_pinctrl_suspend,
rockchip_pinctrl_resume);
static int rockchip_pinctrl_probe(struct platform_device *pdev)
{
struct rockchip_pinctrl *info;
struct device *dev = &pdev->dev;
struct rockchip_pin_ctrl *ctrl;
struct device_node *np = pdev->dev.of_node, *node;
struct resource *res;
void __iomem *base;
int ret;
if (!dev->of_node) {
dev_err(dev, "device tree node not found\n");
return -ENODEV;
}
info = devm_kzalloc(dev, sizeof(struct rockchip_pinctrl), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->dev = dev;
ctrl = rockchip_pinctrl_get_soc_data(info, pdev);
if (!ctrl) {
dev_err(dev, "driver data not available\n");
return -EINVAL;
}
info->ctrl = ctrl;
node = of_parse_phandle(np, "rockchip,grf", 0);
if (node) {
info->regmap_base = syscon_node_to_regmap(node);
if (IS_ERR(info->regmap_base))
return PTR_ERR(info->regmap_base);
} else {
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
rockchip_regmap_config.max_register = resource_size(res) - 4;
rockchip_regmap_config.name = "rockchip,pinctrl";
info->regmap_base = devm_regmap_init_mmio(&pdev->dev, base,
&rockchip_regmap_config);
/* to check for the old dt-bindings */
info->reg_size = resource_size(res);
/* Honor the old binding, with pull registers as 2nd resource */
if (ctrl->type == RK3188 && info->reg_size < 0x200) {
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(base))
return PTR_ERR(base);
rockchip_regmap_config.max_register =
resource_size(res) - 4;
rockchip_regmap_config.name = "rockchip,pinctrl-pull";
info->regmap_pull = devm_regmap_init_mmio(&pdev->dev,
base,
&rockchip_regmap_config);
}
}
/* try to find the optional reference to the pmu syscon */
node = of_parse_phandle(np, "rockchip,pmu", 0);
if (node) {
info->regmap_pmu = syscon_node_to_regmap(node);
if (IS_ERR(info->regmap_pmu))
return PTR_ERR(info->regmap_pmu);
}
ret = rockchip_gpiolib_register(pdev, info);
if (ret)
return ret;
ret = rockchip_pinctrl_register(pdev, info);
if (ret) {
rockchip_gpiolib_unregister(pdev, info);
return ret;
}
platform_set_drvdata(pdev, info);
return 0;
}
static struct rockchip_pin_bank rk2928_pin_banks[] = {
PIN_BANK(0, 32, "gpio0"),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
PIN_BANK(3, 32, "gpio3"),
};
static struct rockchip_pin_ctrl rk2928_pin_ctrl = {
.pin_banks = rk2928_pin_banks,
.nr_banks = ARRAY_SIZE(rk2928_pin_banks),
.label = "RK2928-GPIO",
.type = RK2928,
.grf_mux_offset = 0xa8,
.pull_calc_reg = rk2928_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3036_pin_banks[] = {
PIN_BANK(0, 32, "gpio0"),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
};
static struct rockchip_pin_ctrl rk3036_pin_ctrl = {
.pin_banks = rk3036_pin_banks,
.nr_banks = ARRAY_SIZE(rk3036_pin_banks),
.label = "RK3036-GPIO",
.type = RK2928,
.grf_mux_offset = 0xa8,
.pull_calc_reg = rk2928_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3066a_pin_banks[] = {
PIN_BANK(0, 32, "gpio0"),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
PIN_BANK(3, 32, "gpio3"),
PIN_BANK(4, 32, "gpio4"),
PIN_BANK(6, 16, "gpio6"),
};
static struct rockchip_pin_ctrl rk3066a_pin_ctrl = {
.pin_banks = rk3066a_pin_banks,
.nr_banks = ARRAY_SIZE(rk3066a_pin_banks),
.label = "RK3066a-GPIO",
.type = RK2928,
.grf_mux_offset = 0xa8,
.pull_calc_reg = rk2928_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3066b_pin_banks[] = {
PIN_BANK(0, 32, "gpio0"),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
PIN_BANK(3, 32, "gpio3"),
};
static struct rockchip_pin_ctrl rk3066b_pin_ctrl = {
.pin_banks = rk3066b_pin_banks,
.nr_banks = ARRAY_SIZE(rk3066b_pin_banks),
.label = "RK3066b-GPIO",
.type = RK3066B,
.grf_mux_offset = 0x60,
};
static struct rockchip_pin_bank rk3188_pin_banks[] = {
PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_GPIO_ONLY, 0, 0, 0),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
PIN_BANK(3, 32, "gpio3"),
};
static struct rockchip_pin_ctrl rk3188_pin_ctrl = {
.pin_banks = rk3188_pin_banks,
.nr_banks = ARRAY_SIZE(rk3188_pin_banks),
.label = "RK3188-GPIO",
.type = RK3188,
.grf_mux_offset = 0x60,
.pull_calc_reg = rk3188_calc_pull_reg_and_bit,
};
static struct rockchip_pin_bank rk3288_pin_banks[] = {
PIN_BANK_IOMUX_FLAGS(0, 24, "gpio0", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_UNROUTED
),
PIN_BANK_IOMUX_FLAGS(1, 32, "gpio1", IOMUX_UNROUTED,
IOMUX_UNROUTED,
IOMUX_UNROUTED,
0
),
PIN_BANK_IOMUX_FLAGS(2, 32, "gpio2", 0, 0, 0, IOMUX_UNROUTED),
PIN_BANK_IOMUX_FLAGS(3, 32, "gpio3", 0, 0, 0, IOMUX_WIDTH_4BIT),
PIN_BANK_IOMUX_FLAGS(4, 32, "gpio4", IOMUX_WIDTH_4BIT,
IOMUX_WIDTH_4BIT,
0,
0
),
PIN_BANK_IOMUX_FLAGS(5, 32, "gpio5", IOMUX_UNROUTED,
0,
0,
IOMUX_UNROUTED
),
PIN_BANK_IOMUX_FLAGS(6, 32, "gpio6", 0, 0, 0, IOMUX_UNROUTED),
PIN_BANK_IOMUX_FLAGS(7, 32, "gpio7", 0,
0,
IOMUX_WIDTH_4BIT,
IOMUX_UNROUTED
),
PIN_BANK(8, 16, "gpio8"),
};
static struct rockchip_pin_ctrl rk3288_pin_ctrl = {
.pin_banks = rk3288_pin_banks,
.nr_banks = ARRAY_SIZE(rk3288_pin_banks),
.label = "RK3288-GPIO",
.type = RK3288,
.grf_mux_offset = 0x0,
.pmu_mux_offset = 0x84,
.pull_calc_reg = rk3288_calc_pull_reg_and_bit,
.drv_calc_reg = rk3288_calc_drv_reg_and_bit,
};
static struct rockchip_pin_bank rk3368_pin_banks[] = {
PIN_BANK_IOMUX_FLAGS(0, 32, "gpio0", IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU,
IOMUX_SOURCE_PMU
),
PIN_BANK(1, 32, "gpio1"),
PIN_BANK(2, 32, "gpio2"),
PIN_BANK(3, 32, "gpio3"),
};
static struct rockchip_pin_ctrl rk3368_pin_ctrl = {
.pin_banks = rk3368_pin_banks,
.nr_banks = ARRAY_SIZE(rk3368_pin_banks),
.label = "RK3368-GPIO",
.type = RK3368,
.grf_mux_offset = 0x0,
.pmu_mux_offset = 0x0,
.pull_calc_reg = rk3368_calc_pull_reg_and_bit,
.drv_calc_reg = rk3368_calc_drv_reg_and_bit,
};
static const struct of_device_id rockchip_pinctrl_dt_match[] = {
{ .compatible = "rockchip,rk2928-pinctrl",
.data = (void *)&rk2928_pin_ctrl },
{ .compatible = "rockchip,rk3036-pinctrl",
.data = (void *)&rk3036_pin_ctrl },
{ .compatible = "rockchip,rk3066a-pinctrl",
.data = (void *)&rk3066a_pin_ctrl },
{ .compatible = "rockchip,rk3066b-pinctrl",
.data = (void *)&rk3066b_pin_ctrl },
{ .compatible = "rockchip,rk3188-pinctrl",
.data = (void *)&rk3188_pin_ctrl },
{ .compatible = "rockchip,rk3288-pinctrl",
.data = (void *)&rk3288_pin_ctrl },
{ .compatible = "rockchip,rk3368-pinctrl",
.data = (void *)&rk3368_pin_ctrl },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match);
static struct platform_driver rockchip_pinctrl_driver = {
.probe = rockchip_pinctrl_probe,
.driver = {
.name = "rockchip-pinctrl",
.pm = &rockchip_pinctrl_dev_pm_ops,
.of_match_table = rockchip_pinctrl_dt_match,
},
};
static int __init rockchip_pinctrl_drv_register(void)
{
return platform_driver_register(&rockchip_pinctrl_driver);
}
postcore_initcall(rockchip_pinctrl_drv_register);
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
MODULE_DESCRIPTION("Rockchip pinctrl driver");
MODULE_LICENSE("GPL v2");
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