diff options
Diffstat (limited to 'kernel/drivers/pinctrl/pinctrl-rockchip.c')
| -rw-r--r-- | kernel/drivers/pinctrl/pinctrl-rockchip.c | 2093 |
1 files changed, 2093 insertions, 0 deletions
diff --git a/kernel/drivers/pinctrl/pinctrl-rockchip.c b/kernel/drivers/pinctrl/pinctrl-rockchip.c new file mode 100644 index 000000000..dee7d5f06 --- /dev/null +++ b/kernel/drivers/pinctrl/pinctrl-rockchip.c @@ -0,0 +1,2093 @@ +/* + * 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, +}; + +/** + * 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); +}; + +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 inline struct rockchip_pin_bank *gc_to_pin_bank(struct gpio_chip *gc) +{ + return container_of(gc, struct rockchip_pin_bank, gpio_chip); +} + +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 int rk3288_drv_list[] = { 2, 4, 8, 12 }; + +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; + } +} + +static int rk3288_get_drive(struct rockchip_pin_bank *bank, int pin_num) +{ + struct regmap *regmap; + int reg, ret; + u32 data; + u8 bit; + + rk3288_calc_drv_reg_and_bit(bank, pin_num, ®map, ®, &bit); + + ret = regmap_read(regmap, reg, &data); + if (ret) + return ret; + + data >>= bit; + data &= (1 << RK3288_DRV_BITS_PER_PIN) - 1; + + return rk3288_drv_list[data]; +} + +static int rk3288_set_drive(struct rockchip_pin_bank *bank, int pin_num, + int strength) +{ + struct rockchip_pinctrl *info = bank->drvdata; + struct regmap *regmap; + unsigned long flags; + int reg, ret, i; + u32 data, rmask; + u8 bit; + + rk3288_calc_drv_reg_and_bit(bank, pin_num, ®map, ®, &bit); + + ret = -EINVAL; + for (i = 0; i < ARRAY_SIZE(rk3288_drv_list); i++) { + if (rk3288_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, ®map, ®, &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: + 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, ®map, ®, &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: + 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 = gc_to_pin_bank(chip); + + ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO); + if (ret < 0) + return ret; + + 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); + + 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: + 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->type != RK3288) + return -ENOTSUPP; + + rc = rk3288_set_drive(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->type != RK3288) + return -ENOTSUPP; + + rc = rk3288_get_drive(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 (!info->pctl_dev) { + dev_err(&pdev->dev, "could not register pinctrl driver\n"); + return -EINVAL; + } + + 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 int rockchip_gpio_request(struct gpio_chip *chip, unsigned offset) +{ + return pinctrl_request_gpio(chip->base + offset); +} + +static void rockchip_gpio_free(struct gpio_chip *chip, unsigned offset) +{ + pinctrl_free_gpio(chip->base + offset); +} + +static void rockchip_gpio_set(struct gpio_chip *gc, unsigned offset, int value) +{ + struct rockchip_pin_bank *bank = gc_to_pin_bank(gc); + void __iomem *reg = bank->reg_base + GPIO_SWPORT_DR; + unsigned long flags; + u32 data; + + 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); +} + +/* + * 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 = gc_to_pin_bank(gc); + u32 data; + + data = readl(bank->reg_base + GPIO_EXT_PORT); + 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 = gc_to_pin_bank(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 = rockchip_gpio_request, + .free = rockchip_gpio_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(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_get_chip(irq); + struct rockchip_pin_bank *bank = irq_get_handler_data(irq); + 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 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; + + 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->irq, handle_edge_irq); + else + __irq_set_handler_locked(d->irq, 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); + 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); + + 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; + + bank->saved_masks = irq_reg_readl(gc, GPIO_INTMASK); + irq_reg_writel(gc, ~gc->wake_active, GPIO_INTMASK); +} + +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; + + irq_reg_writel(gc, bank->saved_masks, GPIO_INTMASK); +} + +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; + + 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->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); + 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); + 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 = irq_gc_mask_set_bit; + gc->chip_types[0].chip.irq_unmask = 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_handler_data(bank->irq, bank); + irq_set_chained_handler(bank->irq, rockchip_irq_demux); + } + + 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->dev = &pdev->dev; + gc->of_node = bank->of_node; + gc->label = bank->name; + + ret = gpiochip_add(gc); + 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_enable(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 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, +}; + +static const struct of_device_id rockchip_pinctrl_dt_match[] = { + { .compatible = "rockchip,rk2928-pinctrl", + .data = (void *)&rk2928_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 }, + {}, +}; +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"); |