diff options
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-paris.c')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-paris.c | 1138 |
1 files changed, 1138 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c new file mode 100644 index 000000000..ad873bd05 --- /dev/null +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -0,0 +1,1138 @@ +// 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 <sean.wang@mediatek.com> + * Zhiyong Tao <zhiyong.tao@mediatek.com> + * Hongzhou.Yang <hongzhou.yang@mediatek.com> + */ + +#include <linux/gpio/driver.h> +#include <linux/module.h> +#include <dt-bindings/pinctrl/mt65xx.h> +#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", +}; + +/* + * This section supports converting to/from custom MTK_PIN_CONFIG_DRV_ADV + * and standard PIN_CONFIG_DRIVE_STRENGTH_UA pin configs. + * + * The custom value encodes three hardware bits as follows: + * + * | Bits | + * | 2 (E1) | 1 (E0) | 0 (EN) | drive strength (uA) + * ------------------------------------------------ + * | x | x | 0 | disabled, use standard drive strength + * ------------------------------------- + * | 0 | 0 | 1 | 125 uA + * | 0 | 1 | 1 | 250 uA + * | 1 | 0 | 1 | 500 uA + * | 1 | 1 | 1 | 1000 uA + */ +static const int mtk_drv_adv_uA[] = { 125, 250, 500, 1000 }; + +static int mtk_drv_adv_to_uA(int val) +{ + /* This should never happen. */ + if (WARN_ON_ONCE(val < 0 || val > 7)) + return -EINVAL; + + /* Bit 0 simply enables this hardware part */ + if (!(val & BIT(0))) + return -EINVAL; + + return mtk_drv_adv_uA[(val >> 1)]; +} + +static int mtk_drv_uA_to_adv(int val) +{ + switch (val) { + case 125: + return 0x1; + case 250: + return 0x3; + case 500: + return 0x5; + case 1000: + return 0x7; + } + + return -EINVAL; +} + +static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int pin) +{ + 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]; + + return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, + hw->soc->gpio_m); +} + +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 pullup, reg, err = -ENOTSUPP, ret = 1; + const struct mtk_pin_desc *desc; + + if (pin >= hw->soc->npins) + return -EINVAL; + + 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) + break; + err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret); + if (err) + break; + if (ret == MTK_PUPD_SET_R1R0_00) + ret = MTK_DISABLE; + if (param == PIN_CONFIG_BIAS_DISABLE) { + if (ret != MTK_DISABLE) + err = -EINVAL; + } else if (param == PIN_CONFIG_BIAS_PULL_UP) { + if (!pullup || ret == MTK_DISABLE) + err = -EINVAL; + } else if (param == PIN_CONFIG_BIAS_PULL_DOWN) { + if (pullup || ret == MTK_DISABLE) + err = -EINVAL; + } + 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) + break; + /* 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) + break; + /* return error when in output mode + * because schmitt trigger only work in input mode + */ + if (ret) { + err = -EINVAL; + break; + } + + err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret); + break; + case PIN_CONFIG_DRIVE_STRENGTH: + if (!hw->soc->drive_get) + break; + + if (hw->soc->adv_drive_get) { + err = hw->soc->adv_drive_get(hw, desc, &ret); + if (!err) { + err = mtk_drv_adv_to_uA(ret); + if (err > 0) { + /* PIN_CONFIG_DRIVE_STRENGTH_UA used */ + err = -EINVAL; + break; + } + } + } + + err = hw->soc->drive_get(hw, desc, &ret); + break; + case PIN_CONFIG_DRIVE_STRENGTH_UA: + if (!hw->soc->adv_drive_get) + break; + + err = hw->soc->adv_drive_get(hw, desc, &ret); + if (err) + break; + err = mtk_drv_adv_to_uA(ret); + if (err < 0) + break; + + ret = err; + err = 0; + 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) + break; + pullup = param == MTK_PIN_CONFIG_PU_ADV; + err = hw->soc->adv_pull_get(hw, desc, pullup, &ret); + break; + case MTK_PIN_CONFIG_DRV_ADV: + if (!hw->soc->adv_drive_get) + break; + err = hw->soc->adv_drive_get(hw, desc, &ret); + break; + } + + 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, u32 arg) +{ + struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); + const struct mtk_pin_desc *desc; + int err = -ENOTSUPP; + u32 reg; + + if (pin >= hw->soc->npins) + return -EINVAL; + + desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin]; + + switch ((u32)param) { + case PIN_CONFIG_BIAS_DISABLE: + if (!hw->soc->bias_set_combo) + break; + err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE); + break; + case PIN_CONFIG_BIAS_PULL_UP: + if (!hw->soc->bias_set_combo) + break; + err = hw->soc->bias_set_combo(hw, desc, 1, arg); + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + if (!hw->soc->bias_set_combo) + break; + err = hw->soc->bias_set_combo(hw, desc, 0, arg); + 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) + break; + + 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) + break; + + 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_DO, + arg); + if (err) + break; + + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, + MTK_OUTPUT); + 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) + break; + + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg); + break; + case PIN_CONFIG_DRIVE_STRENGTH: + if (!hw->soc->drive_set) + break; + err = hw->soc->drive_set(hw, desc, arg); + break; + case PIN_CONFIG_DRIVE_STRENGTH_UA: + if (!hw->soc->adv_drive_set) + break; + + err = mtk_drv_uA_to_adv(arg); + if (err < 0) + break; + err = hw->soc->adv_drive_set(hw, desc, err); + 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) + break; + err = hw->soc->adv_pull_set(hw, desc, + (param == MTK_PIN_CONFIG_PU_ADV), + arg); + break; + case MTK_PIN_CONFIG_DRV_ADV: + if (!hw->soc->adv_drive_set) + break; + err = hw->soc->adv_drive_set(hw, desc, arg); + break; + } + + 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 buf_len) +{ + int pinmux, pullup = 0, pullen = 0, len = 0, r1 = -1, r0 = -1, rsel = -1; + const struct mtk_pin_desc *desc; + u32 try_all_type = 0; + + if (gpio >= hw->soc->npins) + return -EINVAL; + + if (mtk_is_virt_gpio(hw, gpio)) + return -EINVAL; + + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; + 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 (hw->soc->pull_type) + try_all_type = hw->soc->pull_type[desc->number]; + + if (hw->rsel_si_unit && (try_all_type & MTK_PULL_RSEL_TYPE)) { + rsel = pullen; + pullen = 1; + } else { + /* Case for: R1R0 */ + 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; + } + + /* Case for: RSEL */ + if (pullen >= MTK_PULL_SET_RSEL_000 && + pullen <= MTK_PULL_SET_RSEL_111) { + rsel = pullen - MTK_PULL_SET_RSEL_000; + pullen = 1; + } + } + len += scnprintf(buf + len, buf_len - len, + "%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d", + gpio, + pinmux, + mtk_pctrl_get_direction(hw, gpio), + mtk_pctrl_get_out(hw, gpio), + mtk_pctrl_get_in(hw, gpio), + mtk_pctrl_get_driving(hw, gpio), + mtk_pctrl_get_smt(hw, gpio), + mtk_pctrl_get_ies(hw, gpio), + pullen, + pullup); + + if (r1 != -1) + len += scnprintf(buf + len, buf_len - len, " (%1d %1d)", r1, r0); + else if (rsel != -1) + len += scnprintf(buf + len, buf_len - len, " (%1d)", rsel); + + 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] = { 0 }; + + (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) +{ + 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; + + 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]; + mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, desc_func->muxval); + + return 0; +} + +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); + struct mtk_pinctrl_group *grp = &hw->groups[group]; + + /* One pin per group only */ + return mtk_pinconf_get(pctldev, grp->pin, config); +} + +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]; + bool drive_strength_uA_found = false; + bool adv_drve_strength_found = false; + 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; + + if (pinconf_to_config_param(configs[i]) == PIN_CONFIG_DRIVE_STRENGTH_UA) + drive_strength_uA_found = true; + if (pinconf_to_config_param(configs[i]) == MTK_PIN_CONFIG_DRV_ADV) + adv_drve_strength_found = true; + } + + /* + * Disable advanced drive strength mode if drive-strength-microamp + * is not set. However, mediatek,drive-strength-adv takes precedence + * as its value can explicitly request the mode be enabled or not. + */ + if (hw->soc->adv_drive_set && !drive_strength_uA_found && + !adv_drve_strength_found) + hw->soc->adv_drive_set(hw, &hw->soc->pins[grp->pin], 0); + + 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; + + /* + * "Virtual" GPIOs are always and only used for interrupts + * Since they are only used for interrupts, they are always inputs + */ + 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; + + if (value) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +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]; + + 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 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_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) +{ + struct device *dev = &pdev->dev; + struct pinctrl_pin_desc *pins; + struct mtk_pinctrl *hw; + int err, i; + + hw = devm_kzalloc(&pdev->dev, sizeof(*hw), GFP_KERNEL); + if (!hw) + return -ENOMEM; + + platform_set_drvdata(pdev, hw); + + hw->soc = device_get_match_data(dev); + if (!hw->soc) + return -ENOENT; + + hw->dev = &pdev->dev; + + if (!hw->soc->nbase_names) + return dev_err_probe(dev, -EINVAL, + "SoC should be assigned at least one register base\n"); + + 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++) { + hw->base[i] = devm_platform_ioremap_resource_byname(pdev, + hw->soc->base_names[i]); + if (IS_ERR(hw->base[i])) + return PTR_ERR(hw->base[i]); + } + + hw->nbase = hw->soc->nbase_names; + + if (of_find_property(hw->dev->of_node, + "mediatek,rsel-resistance-in-si-unit", NULL)) + hw->rsel_si_unit = true; + else + hw->rsel_si_unit = false; + + spin_lock_init(&hw->lock); + + err = mtk_pctrl_build_state(pdev); + if (err) + return dev_err_probe(dev, err, "build state failed\n"); + + /* 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); + if (err) + return dev_err_probe(dev, err, "Failed to add gpio_chip\n"); + + platform_set_drvdata(pdev, hw); + + return 0; +} +EXPORT_SYMBOL_GPL(mtk_paris_pinctrl_probe); + +static int mtk_paris_pinctrl_suspend(struct device *device) +{ + struct mtk_pinctrl *pctl = dev_get_drvdata(device); + + return mtk_eint_do_suspend(pctl->eint); +} + +static int mtk_paris_pinctrl_resume(struct device *device) +{ + struct mtk_pinctrl *pctl = dev_get_drvdata(device); + + return mtk_eint_do_resume(pctl->eint); +} + +const struct dev_pm_ops mtk_paris_pinctrl_pm_ops = { + .suspend_noirq = mtk_paris_pinctrl_suspend, + .resume_noirq = mtk_paris_pinctrl_resume, +}; + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MediaTek Pinctrl Common Driver V2 Paris"); |