// SPDX-License-Identifier: GPL-2.0 /* * MediaTek Pinctrl Paris Driver, which implement the vendor per-pin * bindings for MediaTek SoC. * * Copyright (C) 2018 MediaTek Inc. * Author: Sean Wang * Zhiyong Tao * Hongzhou.Yang */ #include #include #include #include #include "pinctrl-paris.h" #define PINCTRL_PINCTRL_DEV KBUILD_MODNAME /* Custom pinconf parameters */ #define MTK_PIN_CONFIG_TDSEL (PIN_CONFIG_END + 1) #define MTK_PIN_CONFIG_RDSEL (PIN_CONFIG_END + 2) #define MTK_PIN_CONFIG_PU_ADV (PIN_CONFIG_END + 3) #define MTK_PIN_CONFIG_PD_ADV (PIN_CONFIG_END + 4) #define MTK_PIN_CONFIG_DRV_ADV (PIN_CONFIG_END + 5) static const struct pinconf_generic_params mtk_custom_bindings[] = { {"mediatek,tdsel", MTK_PIN_CONFIG_TDSEL, 0}, {"mediatek,rdsel", MTK_PIN_CONFIG_RDSEL, 0}, {"mediatek,pull-up-adv", MTK_PIN_CONFIG_PU_ADV, 1}, {"mediatek,pull-down-adv", MTK_PIN_CONFIG_PD_ADV, 1}, {"mediatek,drive-strength-adv", MTK_PIN_CONFIG_DRV_ADV, 2}, }; #ifdef CONFIG_DEBUG_FS static const struct pin_config_item mtk_conf_items[] = { PCONFDUMP(MTK_PIN_CONFIG_TDSEL, "tdsel", NULL, true), PCONFDUMP(MTK_PIN_CONFIG_RDSEL, "rdsel", NULL, true), PCONFDUMP(MTK_PIN_CONFIG_PU_ADV, "pu-adv", NULL, true), PCONFDUMP(MTK_PIN_CONFIG_PD_ADV, "pd-adv", NULL, true), PCONFDUMP(MTK_PIN_CONFIG_DRV_ADV, "drive-strength-adv", NULL, true), }; #endif static const char * const mtk_gpio_functions[] = { "func0", "func1", "func2", "func3", "func4", "func5", "func6", "func7", "func8", "func9", "func10", "func11", "func12", "func13", "func14", "func15", }; static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int pin) { int err; struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); const struct mtk_pin_desc *desc; desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, hw->soc->gpio_m); if (err) return err; if (hw->soc->eh_pin_pinmux) mtk_eh_ctrl(hw, desc, hw->soc->gpio_m); return 0; } static int mtk_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev, struct pinctrl_gpio_range *range, unsigned int pin, bool input) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); const struct mtk_pin_desc *desc; desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; /* hardware would take 0 as input direction */ return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !input); } static int mtk_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, unsigned long *config) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); u32 param = pinconf_to_config_param(*config); int err, reg, ret = 1; int pullup; const struct mtk_pin_desc *desc; if (pin >= hw->soc->npins) { err = -EINVAL; goto out; } desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; switch (param) { case PIN_CONFIG_BIAS_DISABLE: case PIN_CONFIG_BIAS_PULL_UP: case PIN_CONFIG_BIAS_PULL_DOWN: if (hw->soc->bias_get_combo) { err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret); if (err) goto out; if (param == PIN_CONFIG_BIAS_DISABLE) { if (ret == MTK_PUPD_SET_R1R0_00) ret = MTK_DISABLE; } else if (param == PIN_CONFIG_BIAS_PULL_UP) { /* When desire to get pull-up value, return * error if current setting is pull-down */ if (!pullup) err = -EINVAL; } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) { /* When desire to get pull-down value, return * error if current setting is pull-up */ if (pullup) err = -EINVAL; } } else { err = -ENOTSUPP; } break; case PIN_CONFIG_SLEW_RATE: err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret); break; case PIN_CONFIG_INPUT_ENABLE: case PIN_CONFIG_OUTPUT_ENABLE: err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); if (err) goto out; /* CONFIG Current direction return value * ------------- ----------------- ---------------------- * OUTPUT_ENABLE output 1 (= HW value) * input 0 (= HW value) * INPUT_ENABLE output 0 (= reverse HW value) * input 1 (= reverse HW value) */ if (param == PIN_CONFIG_INPUT_ENABLE) ret = !ret; break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); if (err) goto out; /* return error when in output mode * because schmitt trigger only work in input mode */ if (ret) { err = -EINVAL; goto out; } err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret); break; case PIN_CONFIG_DRIVE_STRENGTH: if (hw->soc->drive_get) err = hw->soc->drive_get(hw, desc, &ret); else err = -ENOTSUPP; break; case MTK_PIN_CONFIG_TDSEL: case MTK_PIN_CONFIG_RDSEL: reg = (param == MTK_PIN_CONFIG_TDSEL) ? PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; err = mtk_hw_get_value(hw, desc, reg, &ret); break; case MTK_PIN_CONFIG_PU_ADV: case MTK_PIN_CONFIG_PD_ADV: if (hw->soc->adv_pull_get) { bool pullup; pullup = param == MTK_PIN_CONFIG_PU_ADV; err = hw->soc->adv_pull_get(hw, desc, pullup, &ret); } else err = -ENOTSUPP; break; case MTK_PIN_CONFIG_DRV_ADV: if (hw->soc->adv_drive_get) err = hw->soc->adv_drive_get(hw, desc, &ret); else err = -ENOTSUPP; break; default: err = -ENOTSUPP; } out: if (!err) *config = pinconf_to_config_packed(param, ret); return err; } static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, enum pin_config_param param, enum pin_config_param arg) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); const struct mtk_pin_desc *desc; int err = 0; u32 reg; if (pin >= hw->soc->npins) { err = -EINVAL; goto err; } desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; switch ((u32)param) { case PIN_CONFIG_BIAS_DISABLE: if (hw->soc->bias_set_combo) err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE); else err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_UP: if (hw->soc->bias_set_combo) err = hw->soc->bias_set_combo(hw, desc, 1, arg); else err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_DOWN: if (hw->soc->bias_set_combo) err = hw->soc->bias_set_combo(hw, desc, 0, arg); else err = -ENOTSUPP; break; case PIN_CONFIG_OUTPUT_ENABLE: err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_DISABLE); /* Keep set direction to consider the case that a GPIO pin * does not have SMT control */ if (err != -ENOTSUPP) goto err; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_OUTPUT); break; case PIN_CONFIG_INPUT_ENABLE: /* regard all non-zero value as enable */ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg); if (err) goto err; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_INPUT); break; case PIN_CONFIG_SLEW_RATE: /* regard all non-zero value as enable */ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg); break; case PIN_CONFIG_OUTPUT: err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_OUTPUT); if (err) goto err; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, arg); break; case PIN_CONFIG_INPUT_SCHMITT: case PIN_CONFIG_INPUT_SCHMITT_ENABLE: /* arg = 1: Input mode & SMT enable ; * arg = 0: Output mode & SMT disable */ err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg); if (err) goto err; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg); break; case PIN_CONFIG_DRIVE_STRENGTH: if (hw->soc->drive_set) err = hw->soc->drive_set(hw, desc, arg); else err = -ENOTSUPP; break; case MTK_PIN_CONFIG_TDSEL: case MTK_PIN_CONFIG_RDSEL: reg = (param == MTK_PIN_CONFIG_TDSEL) ? PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; err = mtk_hw_set_value(hw, desc, reg, arg); break; case MTK_PIN_CONFIG_PU_ADV: case MTK_PIN_CONFIG_PD_ADV: if (hw->soc->adv_pull_set) { bool pullup; pullup = param == MTK_PIN_CONFIG_PU_ADV; err = hw->soc->adv_pull_set(hw, desc, pullup, arg); } else err = -ENOTSUPP; break; case MTK_PIN_CONFIG_DRV_ADV: if (hw->soc->adv_drive_set) err = hw->soc->adv_drive_set(hw, desc, arg); else err = -ENOTSUPP; break; default: err = -ENOTSUPP; } err: return err; } static struct mtk_pinctrl_group * mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *hw, u32 pin) { int i; for (i = 0; i < hw->soc->ngrps; i++) { struct mtk_pinctrl_group *grp = hw->groups + i; if (grp->pin == pin) return grp; } return NULL; } static const struct mtk_func_desc * mtk_pctrl_find_function_by_pin(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum) { const struct mtk_pin_desc *pin = hw->soc->pins + pin_num; const struct mtk_func_desc *func = pin->funcs; while (func && func->name) { if (func->muxval == fnum) return func; func++; } return NULL; } static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *hw, u32 pin_num, u32 fnum) { int i; for (i = 0; i < hw->soc->npins; i++) { const struct mtk_pin_desc *pin = hw->soc->pins + i; if (pin->number == pin_num) { const struct mtk_func_desc *func = pin->funcs; while (func && func->name) { if (func->muxval == fnum) return true; func++; } break; } } return false; } static int mtk_pctrl_dt_node_to_map_func(struct mtk_pinctrl *pctl, u32 pin, u32 fnum, struct mtk_pinctrl_group *grp, struct pinctrl_map **map, unsigned *reserved_maps, unsigned *num_maps) { bool ret; if (*num_maps == *reserved_maps) return -ENOSPC; (*map)[*num_maps].type = PIN_MAP_TYPE_MUX_GROUP; (*map)[*num_maps].data.mux.group = grp->name; ret = mtk_pctrl_is_function_valid(pctl, pin, fnum); if (!ret) { dev_err(pctl->dev, "invalid function %d on pin %d .\n", fnum, pin); return -EINVAL; } (*map)[*num_maps].data.mux.function = mtk_gpio_functions[fnum]; (*num_maps)++; return 0; } static int mtk_pctrl_dt_subnode_to_map(struct pinctrl_dev *pctldev, struct device_node *node, struct pinctrl_map **map, unsigned *reserved_maps, unsigned *num_maps) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); int num_pins, num_funcs, maps_per_pin, i, err; struct mtk_pinctrl_group *grp; unsigned int num_configs; bool has_config = false; unsigned long *configs; u32 pinfunc, pin, func; struct property *pins; unsigned reserve = 0; pins = of_find_property(node, "pinmux", NULL); if (!pins) { dev_err(hw->dev, "missing pins property in node %pOFn .\n", node); return -EINVAL; } err = pinconf_generic_parse_dt_config(node, pctldev, &configs, &num_configs); if (err) return err; if (num_configs) has_config = true; num_pins = pins->length / sizeof(u32); num_funcs = num_pins; maps_per_pin = 0; if (num_funcs) maps_per_pin++; if (has_config && num_pins >= 1) maps_per_pin++; if (!num_pins || !maps_per_pin) { err = -EINVAL; goto exit; } reserve = num_pins * maps_per_pin; err = pinctrl_utils_reserve_map(pctldev, map, reserved_maps, num_maps, reserve); if (err < 0) goto exit; for (i = 0; i < num_pins; i++) { err = of_property_read_u32_index(node, "pinmux", i, &pinfunc); if (err) goto exit; pin = MTK_GET_PIN_NO(pinfunc); func = MTK_GET_PIN_FUNC(pinfunc); if (pin >= hw->soc->npins || func >= ARRAY_SIZE(mtk_gpio_functions)) { dev_err(hw->dev, "invalid pins value.\n"); err = -EINVAL; goto exit; } grp = mtk_pctrl_find_group_by_pin(hw, pin); if (!grp) { dev_err(hw->dev, "unable to match pin %d to group\n", pin); err = -EINVAL; goto exit; } err = mtk_pctrl_dt_node_to_map_func(hw, pin, func, grp, map, reserved_maps, num_maps); if (err < 0) goto exit; if (has_config) { err = pinctrl_utils_add_map_configs(pctldev, map, reserved_maps, num_maps, grp->name, configs, num_configs, PIN_MAP_TYPE_CONFIGS_GROUP); if (err < 0) goto exit; } } err = 0; exit: kfree(configs); return err; } static int mtk_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, struct device_node *np_config, struct pinctrl_map **map, unsigned *num_maps) { struct device_node *np; unsigned reserved_maps; int ret; *map = NULL; *num_maps = 0; reserved_maps = 0; for_each_child_of_node(np_config, np) { ret = mtk_pctrl_dt_subnode_to_map(pctldev, np, map, &reserved_maps, num_maps); if (ret < 0) { pinctrl_utils_free_map(pctldev, *map, *num_maps); of_node_put(np); return ret; } } return 0; } static int mtk_pctrl_get_groups_count(struct pinctrl_dev *pctldev) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); return hw->soc->ngrps; } static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, unsigned group) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); return hw->groups[group].name; } static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, const unsigned **pins, unsigned *num_pins) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); *pins = (unsigned *)&hw->groups[group].pin; *num_pins = 1; return 0; } static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field) { const struct mtk_pin_desc *desc; int value, err; if (gpio > hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; err = mtk_hw_get_value(hw, desc, field, &value); if (err) return err; return value; } #define mtk_pctrl_get_pinmux(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE) #define mtk_pctrl_get_direction(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR) #define mtk_pctrl_get_out(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO) #define mtk_pctrl_get_in(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI) #define mtk_pctrl_get_smt(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT) #define mtk_pctrl_get_ies(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES) #define mtk_pctrl_get_driving(hw, gpio) \ mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV) ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw, unsigned int gpio, char *buf, unsigned int bufLen) { const struct mtk_pin_desc *desc; int pinmux, pullup = 0, pullen = 0, r1 = -1, r0 = -1, len = 0, val; if (gpio > hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; if (desc->eint.eint_m != NO_EINT_SUPPORT && desc->funcs[desc->eint.eint_m].name == 0) return 0; pinmux = mtk_pctrl_get_pinmux(hw, gpio); if (pinmux >= hw->soc->nfuncs) pinmux -= hw->soc->nfuncs; mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen); if (pullen == MTK_PUPD_SET_R1R0_00) { pullen = 0; r1 = 0; r0 = 0; } else if (pullen == MTK_PUPD_SET_R1R0_01) { pullen = 1; r1 = 0; r0 = 1; } else if (pullen == MTK_PUPD_SET_R1R0_10) { pullen = 1; r1 = 1; r0 = 0; } else if (pullen == MTK_PUPD_SET_R1R0_11) { pullen = 1; r1 = 1; r0 = 1; } else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) { pullen = 0; } len += snprintf(buf + len, bufLen - len, "%03d: %1d%1d%1d%1d", gpio, pinmux, mtk_pctrl_get_direction(hw, gpio), mtk_pctrl_get_out(hw, gpio), mtk_pctrl_get_in(hw, gpio)); val = mtk_pctrl_get_driving(hw, gpio); if (val >= 0) len += snprintf(buf + len, bufLen - len, "%02d", val); else len += snprintf(buf + len, bufLen - len, "XX"); val = mtk_pctrl_get_smt(hw, gpio); if (val >= 0) len += snprintf(buf + len, bufLen - len, "%1d", val); else len += snprintf(buf + len, bufLen - len, "X"); val = mtk_pctrl_get_ies(hw, gpio); if (val >= 0) len += snprintf(buf + len, bufLen - len, "%1d", val); else len += snprintf(buf + len, bufLen - len, "X"); if (r1 != -1) len += snprintf(buf + len, bufLen - len, "%1d%1d (%1d %1d)\n", pullen, pullup, r1, r0); else len += snprintf(buf + len, bufLen - len, "%1d%1d\n", pullen, pullup); return len; } EXPORT_SYMBOL_GPL(mtk_pctrl_show_one_pin); #define PIN_DBG_BUF_SZ 96 static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, unsigned int gpio) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); char buf[PIN_DBG_BUF_SZ]; (void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ); seq_printf(s, "%s", buf); } static const struct pinctrl_ops mtk_pctlops = { .dt_node_to_map = mtk_pctrl_dt_node_to_map, .dt_free_map = pinctrl_utils_free_map, .get_groups_count = mtk_pctrl_get_groups_count, .get_group_name = mtk_pctrl_get_group_name, .get_group_pins = mtk_pctrl_get_group_pins, .pin_dbg_show = mtk_pctrl_dbg_show, }; static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); if (hw->soc->nfuncs) return (int)hw->soc->nfuncs; return ARRAY_SIZE(mtk_gpio_functions); } static const char *mtk_pmx_get_func_name(struct pinctrl_dev *pctldev, unsigned selector) { return mtk_gpio_functions[selector]; } static int mtk_pmx_get_func_groups(struct pinctrl_dev *pctldev, unsigned function, const char * const **groups, unsigned * const num_groups) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); *groups = hw->grp_names; *num_groups = hw->soc->ngrps; return 0; } static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, unsigned function, unsigned group) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); struct mtk_pinctrl_group *grp = hw->groups + group; const struct mtk_func_desc *desc_func; const struct mtk_pin_desc *desc; bool ret; int err; ret = mtk_pctrl_is_function_valid(hw, grp->pin, function); if (!ret) { dev_err(hw->dev, "invalid function %d on group %d .\n", function, group); return -EINVAL; } desc_func = mtk_pctrl_find_function_by_pin(hw, grp->pin, function); if (!desc_func) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[grp->pin]; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval); return err; } static const struct pinmux_ops mtk_pmxops = { .get_functions_count = mtk_pmx_get_funcs_cnt, .get_function_name = mtk_pmx_get_func_name, .get_function_groups = mtk_pmx_get_func_groups, .set_mux = mtk_pmx_set_mux, .gpio_set_direction = mtk_pinmux_gpio_set_direction, .gpio_request_enable = mtk_pinmux_gpio_request_enable, }; static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group, unsigned long *config) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); *config = hw->groups[group].config; return 0; } static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group, unsigned long *configs, unsigned num_configs) { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); struct mtk_pinctrl_group *grp = &hw->groups[group]; int i, ret; for (i = 0; i < num_configs; i++) { ret = mtk_pinconf_set(pctldev, grp->pin, pinconf_to_config_param(configs[i]), pinconf_to_config_argument(configs[i])); if (ret < 0) return ret; grp->config = configs[i]; } return 0; } static const struct pinconf_ops mtk_confops = { .pin_config_get = mtk_pinconf_get, .pin_config_group_get = mtk_pconf_group_get, .pin_config_group_set = mtk_pconf_group_set, .is_generic = true, }; static struct pinctrl_desc mtk_desc = { .name = PINCTRL_PINCTRL_DEV, .pctlops = &mtk_pctlops, .pmxops = &mtk_pmxops, .confops = &mtk_confops, .owner = THIS_MODULE, }; static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; int value, err; if (gpio > hw->soc->npins) return -EINVAL; if (mtk_is_virt_gpio(hw, gpio)) return 1; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value); if (err) return err; return !value; } static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; int value, err; if (gpio > hw->soc->npins) return -EINVAL; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value); if (err) return err; return !!value; } static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; if (gpio > hw->soc->npins) return; desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; (void)mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value); } static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); if (gpio > hw->soc->npins) return -EINVAL; return pinctrl_gpio_direction_input(chip->base + gpio); } static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio, int value) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); if (gpio > hw->soc->npins) return -EINVAL; mtk_gpio_set(chip, gpio, value); return pinctrl_gpio_direction_output(chip->base + gpio); } static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned int offset) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; if (!hw->eint) return -ENOTSUPP; desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; if (desc->eint.eint_n == EINT_NA) return -ENOTSUPP; return mtk_eint_find_irq(hw->eint, desc->eint.eint_n); } static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned int offset, unsigned long config) { struct mtk_pinctrl *hw = gpiochip_get_data(chip); const struct mtk_pin_desc *desc; u32 debounce; desc = (const struct mtk_pin_desc *)&hw->soc->pins[offset]; if (!hw->eint || pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE || desc->eint.eint_n == EINT_NA) return -ENOTSUPP; debounce = pinconf_to_config_argument(config); return mtk_eint_set_debounce(hw->eint, desc->eint.eint_n, debounce); } static int mtk_build_gpiochip(struct mtk_pinctrl *hw, struct device_node *np) { struct gpio_chip *chip = &hw->chip; int ret; chip->label = PINCTRL_PINCTRL_DEV; chip->parent = hw->dev; chip->request = gpiochip_generic_request; chip->free = gpiochip_generic_free; chip->get_direction = mtk_gpio_get_direction; chip->direction_input = mtk_gpio_direction_input; chip->direction_output = mtk_gpio_direction_output; chip->get = mtk_gpio_get; chip->set = mtk_gpio_set; chip->to_irq = mtk_gpio_to_irq, chip->set_config = mtk_gpio_set_config, chip->base = -1; chip->ngpio = hw->soc->npins; chip->of_node = np; chip->of_gpio_n_cells = 2; ret = gpiochip_add_data(chip, hw); if (ret < 0) return ret; return 0; } static int mtk_pctrl_build_state(struct platform_device *pdev) { struct mtk_pinctrl *hw = platform_get_drvdata(pdev); int i; /* Allocate groups */ hw->groups = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, sizeof(*hw->groups), GFP_KERNEL); if (!hw->groups) return -ENOMEM; /* We assume that one pin is one group, use pin name as group name. */ hw->grp_names = devm_kmalloc_array(&pdev->dev, hw->soc->ngrps, sizeof(*hw->grp_names), GFP_KERNEL); if (!hw->grp_names) return -ENOMEM; for (i = 0; i < hw->soc->npins; i++) { const struct mtk_pin_desc *pin = hw->soc->pins + i; struct mtk_pinctrl_group *group = hw->groups + i; group->name = pin->name; group->pin = pin->number; hw->grp_names[i] = pin->name; } return 0; } int mtk_paris_pinctrl_probe(struct platform_device *pdev, const struct mtk_pin_soc *soc) { struct device_node *np = pdev->dev.of_node, *node; struct pinctrl_pin_desc *pins; struct mtk_pinctrl *hw; struct property *prop; struct resource *res; int err, i; hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL); if (!hw) return -ENOMEM; platform_set_drvdata(pdev, hw); hw->soc = soc; hw->dev = &pdev->dev; if (hw->soc->nbase_names) { hw->base = devm_kmalloc_array(&pdev->dev, hw->soc->nbase_names, sizeof(*hw->base), GFP_KERNEL); if (!hw->base) return -ENOMEM; for (i = 0; i < hw->soc->nbase_names; i++) { res = platform_get_resource_byname(pdev, IORESOURCE_MEM, hw->soc->base_names[i]); if (!res) { dev_notice(&pdev->dev, "missing IO resource\n"); return -ENXIO; } hw->base[i] = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hw->base[i])) return PTR_ERR(hw->base[i]); } hw->nbase = hw->soc->nbase_names; } else { prop = of_find_property(np, "reg_bases", NULL); if (!prop) return -ENXIO; i = prop->length / sizeof(phandle); if (i < 1) return -EINVAL; hw->nbase = i; hw->base = devm_kmalloc_array(&pdev->dev, i, sizeof(*hw->base), GFP_KERNEL | __GFP_ZERO); if (IS_ERR(hw->base)) return PTR_ERR(hw->base); for (i = 0; i < hw->nbase; i++) { node = of_parse_phandle(np, "reg_bases", i); if (!node) return -EINVAL; hw->base[i] = of_iomap(node, 0); if (IS_ERR(hw->base[i])) return PTR_ERR(hw->base[i]); of_node_put(node); } } err = mtk_pctrl_build_state(pdev); if (err) { dev_err(&pdev->dev, "build state failed: %d\n", err); return -EINVAL; } /* Copy from internal struct mtk_pin_desc to register to the core */ pins = devm_kmalloc_array(&pdev->dev, hw->soc->npins, sizeof(*pins), GFP_KERNEL); if (!pins) return -ENOMEM; for (i = 0; i < hw->soc->npins; i++) { pins[i].number = hw->soc->pins[i].number; pins[i].name = hw->soc->pins[i].name; } /* Setup pins descriptions per SoC types */ mtk_desc.pins = (const struct pinctrl_pin_desc *)pins; mtk_desc.npins = hw->soc->npins; mtk_desc.num_custom_params = ARRAY_SIZE(mtk_custom_bindings); mtk_desc.custom_params = mtk_custom_bindings; #ifdef CONFIG_DEBUG_FS mtk_desc.custom_conf_items = mtk_conf_items; #endif err = devm_pinctrl_register_and_init(&pdev->dev, &mtk_desc, hw, &hw->pctrl); if (err) return err; err = pinctrl_enable(hw->pctrl); if (err) return err; err = mtk_build_eint(hw, pdev); if (err) dev_warn(&pdev->dev, "Failed to add EINT, but pinctrl still can work\n"); /* Build gpiochip should be after pinctrl_enable is done */ err = mtk_build_gpiochip(hw, pdev->dev.of_node); if (err) { dev_err(&pdev->dev, "Failed to add gpio_chip\n"); return err; } platform_set_drvdata(pdev, hw); return 0; } EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris");