/* * 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 <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, }; enum rockchip_pin_bank_type { COMMON_BANK, RK3188_BANK0, }; /** * @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 * @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 * @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; void __iomem *reg_pull; struct clk *clk; int irq; u32 pin_base; u8 nr_pins; char *name; u8 bank_num; enum rockchip_pin_bank_type bank_type; 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, \ } /** */ struct rockchip_pin_ctrl { struct rockchip_pin_bank *pin_banks; u32 nr_banks; u32 nr_pins; char *label; enum rockchip_pinctrl_type type; int mux_offset; void (*pull_calc_reg)(struct rockchip_pin_bank *bank, int pin_num, void __iomem **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 { void __iomem *reg_base; int reg_size; void __iomem *reg_pull; 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 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; void __iomem *reg = info->reg_base + info->ctrl->mux_offset; u8 bit; if (bank->bank_type == RK3188_BANK0 && pin < 16) return RK_FUNC_GPIO; /* get basic quadrupel of mux registers and the correct reg inside */ reg += bank->bank_num * 0x10; reg += (pin / 8) * 4; bit = (pin % 8) * 2; return ((readl(reg) >> bit) & 3); } /* * 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; void __iomem *reg = info->reg_base + info->ctrl->mux_offset; unsigned long flags; u8 bit; u32 data; /* * The first 16 pins of rk3188_bank0 are always gpios and do not have * a mux register at all. */ if (bank->bank_type == RK3188_BANK0 && pin < 16) { 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); /* get basic quadrupel of mux registers and the correct reg inside */ reg += bank->bank_num * 0x10; reg += (pin / 8) * 4; bit = (pin % 8) * 2; spin_lock_irqsave(&bank->slock, flags); data = (3 << (bit + 16)); data |= (mux & 3) << bit; writel(data, reg); spin_unlock_irqrestore(&bank->slock, flags); return 0; } #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, void __iomem **reg, u8 *bit) { struct rockchip_pinctrl *info = bank->drvdata; *reg = info->reg_base + 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 static void rk3188_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank, int pin_num, void __iomem **reg, u8 *bit) { struct rockchip_pinctrl *info = bank->drvdata; /* The first 12 pins of the first bank are located elsewhere */ if (bank->bank_type == RK3188_BANK0 && pin_num < 12) { *reg = bank->reg_pull + ((pin_num / RK3188_PULL_PINS_PER_REG) * 4); *bit = pin_num % RK3188_PULL_PINS_PER_REG; *bit *= RK3188_PULL_BITS_PER_PIN; } else { *reg = info->reg_pull ? info->reg_pull : info->reg_base + 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; } } 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; void __iomem *reg; 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, ®, &bit); switch (ctrl->type) { case RK2928: return !(readl_relaxed(reg) & BIT(bit)) ? PIN_CONFIG_BIAS_PULL_PIN_DEFAULT : PIN_CONFIG_BIAS_DISABLE; case RK3188: data = readl_relaxed(reg) >> 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; void __iomem *reg; unsigned long flags; u8 bit; u32 data; 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, ®, &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); writel(data, reg); spin_unlock_irqrestore(&bank->slock, flags); break; case RK3188: spin_lock_irqsave(&bank->slock, flags); /* enable the write to the equivalent lower bits */ data = ((1 << RK3188_PULL_BITS_PER_PIN) - 1) << (bit + 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; } writel(data, reg); spin_unlock_irqrestore(&bank->slock, flags); break; default: dev_err(info->dev, "unsupported pinctrl type\n"); return -EINVAL; } return 0; } /* * 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_enable(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; } static void rockchip_pmx_disable(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; struct rockchip_pin_bank *bank; int cnt; dev_dbg(info->dev, "disable function %s group %s\n", info->functions[selector].name, info->groups[group].name); for (cnt = 0; cnt < info->groups[group].npins; cnt++) { bank = pin_to_bank(info, pins[cnt]); rockchip_set_mux(bank, pins[cnt] - bank->pin_base, 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 pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned offset, bool input) { struct rockchip_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); struct rockchip_pin_bank *bank; struct gpio_chip *chip; int pin, ret; u32 data; chip = range->gc; bank = gc_to_pin_bank(chip); 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"); ret = rockchip_set_mux(bank, pin, RK_FUNC_GPIO); if (ret < 0) return ret; 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); return 0; } 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, .enable = rockchip_pmx_enable, .disable = rockchip_pmx_disable, .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: return (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT); } return false; } static int rockchip_gpio_direction_output(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: rc = rockchip_gpio_direction_output(&bank->gpio_chip, pin - bank->pin_base, arg); if (rc) 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; 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, }; 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, &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++; } } 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); } ret = rockchip_pinctrl_parse_dt(pdev, info); if (ret) { pinctrl_unregister(info->pctl_dev); return ret; } 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 polarity = 0, data = 0; u32 pend; bool edge_changed = false; 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); if (bank->toggle_edge_mode) { polarity = readl_relaxed(bank->reg_base + GPIO_INT_POLARITY); data = readl_relaxed(bank->reg_base + GPIO_EXT_PORT); } 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)) { if (data & BIT(irq)) polarity &= ~BIT(irq); else polarity |= BIT(irq); edge_changed = true; } generic_handle_irq(virq); } if (bank->toggle_edge_mode && edge_changed) { /* Interrupt params should only be set with ints disabled */ data = readl_relaxed(bank->reg_base + GPIO_INTEN); writel_relaxed(0, bank->reg_base + GPIO_INTEN); writel(polarity, bank->reg_base + GPIO_INT_POLARITY); writel(data, bank->reg_base + GPIO_INTEN); } 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; 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; data = readl_relaxed(bank->reg_base + GPIO_SWPORT_DDR); data &= ~mask; writel_relaxed(data, bank->reg_base + GPIO_SWPORT_DDR); 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); 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); return -EINVAL; } writel_relaxed(level, gc->reg_base + GPIO_INTTYPE_LEVEL); writel_relaxed(polarity, gc->reg_base + GPIO_INT_POLARITY); irq_gc_unlock(gc); return 0; } 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; } 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_INTEN; 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_clr_bit; gc->chip_types[0].chip.irq_unmask = irq_gc_mask_set_bit; gc->chip_types[0].chip.irq_set_wake = irq_gc_set_wake; gc->chip_types[0].chip.irq_set_type = rockchip_irq_set_type; 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; if (gpiochip_remove(&bank->gpio_chip)) dev_err(&pdev->dev, "gpio chip %s remove failed\n", bank->gpio_chip.label); } 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 ret = 0; int i; for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) { if (!bank->valid) continue; ret = gpiochip_remove(&bank->gpio_chip); } if (ret) dev_err(&pdev->dev, "gpio chip remove failed\n"); return ret; } static int rockchip_get_bank_data(struct rockchip_pin_bank *bank, struct device *dev) { struct resource res; if (of_address_to_resource(bank->of_node, 0, &res)) { dev_err(dev, "cannot find IO resource for bank\n"); return -ENOENT; } bank->reg_base = devm_ioremap_resource(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")) { bank->bank_type = RK3188_BANK0; if (of_address_to_resource(bank->of_node, 1, &res)) { dev_err(dev, "cannot find IO resource for bank\n"); return -ENOENT; } bank->reg_pull = devm_ioremap_resource(dev, &res); if (IS_ERR(bank->reg_pull)) return PTR_ERR(bank->reg_pull); } else { bank->bank_type = COMMON_BANK; } 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 i; 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, &pdev->dev)) bank->valid = true; break; } } } bank = ctrl->pin_banks; for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { spin_lock_init(&bank->slock); bank->drvdata = d; bank->pin_base = ctrl->nr_pins; ctrl->nr_pins += bank->nr_pins; } return ctrl; } static int rockchip_pinctrl_probe(struct platform_device *pdev) { struct rockchip_pinctrl *info; struct device *dev = &pdev->dev; struct rockchip_pin_ctrl *ctrl; struct resource *res; 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; ctrl = rockchip_pinctrl_get_soc_data(info, pdev); if (!ctrl) { dev_err(dev, "driver data not available\n"); return -EINVAL; } info->ctrl = ctrl; info->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); info->reg_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(info->reg_base)) return PTR_ERR(info->reg_base); /* 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); info->reg_pull = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(info->reg_pull)) return PTR_ERR(info->reg_pull); } 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, .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, .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, .mux_offset = 0x60, }; static struct rockchip_pin_bank rk3188_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 rk3188_pin_ctrl = { .pin_banks = rk3188_pin_banks, .nr_banks = ARRAY_SIZE(rk3188_pin_banks), .label = "RK3188-GPIO", .type = RK3188, .mux_offset = 0x60, .pull_calc_reg = rk3188_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 }, {}, }; MODULE_DEVICE_TABLE(of, rockchip_pinctrl_dt_match); static struct platform_driver rockchip_pinctrl_driver = { .probe = rockchip_pinctrl_probe, .driver = { .name = "rockchip-pinctrl", .owner = THIS_MODULE, .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");