diff options
Diffstat (limited to 'drivers/pinctrl/mediatek/pinctrl-mtk-common.c')
| -rw-r--r-- | drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 1150 |
1 files changed, 1150 insertions, 0 deletions
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c new file mode 100644 index 000000000..f25b3e093 --- /dev/null +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c @@ -0,0 +1,1150 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver. + * Copyright (c) 2014 MediaTek Inc. + * Author: Hongzhou.Yang <hongzhou.yang@mediatek.com> + */ + +#include <linux/io.h> +#include <linux/gpio/driver.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_device.h> +#include <linux/of_irq.h> +#include <linux/pinctrl/consumer.h> +#include <linux/pinctrl/machine.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/bitops.h> +#include <linux/regmap.h> +#include <linux/mfd/syscon.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/pm.h> +#include <dt-bindings/pinctrl/mt65xx.h> + +#include "../core.h" +#include "../pinconf.h" +#include "../pinctrl-utils.h" +#include "mtk-eint.h" +#include "pinctrl-mtk-common.h" + +#define GPIO_MODE_BITS 3 +#define GPIO_MODE_PREFIX "GPIO" + +static const char * const mtk_gpio_functions[] = { + "func0", "func1", "func2", "func3", + "func4", "func5", "func6", "func7", + "func8", "func9", "func10", "func11", + "func12", "func13", "func14", "func15", +}; + +/* + * There are two base address for pull related configuration + * in mt8135, and different GPIO pins use different base address. + * When pin number greater than type1_start and less than type1_end, + * should use the second base address. + */ +static struct regmap *mtk_get_regmap(struct mtk_pinctrl *pctl, + unsigned long pin) +{ + if (pin >= pctl->devdata->type1_start && pin < pctl->devdata->type1_end) + return pctl->regmap2; + return pctl->regmap1; +} + +static unsigned int mtk_get_port(struct mtk_pinctrl *pctl, unsigned long pin) +{ + /* Different SoC has different mask and port shift. */ + return ((pin >> pctl->devdata->mode_shf) & pctl->devdata->port_mask) + << pctl->devdata->port_shf; +} + +static int mtk_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, unsigned offset, + bool input) +{ + unsigned int reg_addr; + unsigned int bit; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; + bit = BIT(offset & pctl->devdata->mode_mask); + + if (pctl->devdata->spec_dir_set) + pctl->devdata->spec_dir_set(®_addr, offset); + + if (input) + /* Different SoC has different alignment offset. */ + reg_addr = CLR_ADDR(reg_addr, pctl); + else + reg_addr = SET_ADDR(reg_addr, pctl); + + regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); + return 0; +} + +static void mtk_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + unsigned int reg_addr; + unsigned int bit; + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + + reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset; + bit = BIT(offset & pctl->devdata->mode_mask); + + if (value) + reg_addr = SET_ADDR(reg_addr, pctl); + else + reg_addr = CLR_ADDR(reg_addr, pctl); + + regmap_write(mtk_get_regmap(pctl, offset), reg_addr, bit); +} + +static int mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin, + int value, enum pin_config_param arg) +{ + unsigned int reg_addr, offset; + unsigned int bit; + + /** + * Due to some soc are not support ies/smt config, add this special + * control to handle it. + */ + if (!pctl->devdata->spec_ies_smt_set && + pctl->devdata->ies_offset == MTK_PINCTRL_NOT_SUPPORT && + arg == PIN_CONFIG_INPUT_ENABLE) + return -EINVAL; + + if (!pctl->devdata->spec_ies_smt_set && + pctl->devdata->smt_offset == MTK_PINCTRL_NOT_SUPPORT && + arg == PIN_CONFIG_INPUT_SCHMITT_ENABLE) + return -EINVAL; + + /* + * Due to some pins are irregular, their input enable and smt + * control register are discontinuous, so we need this special handle. + */ + if (pctl->devdata->spec_ies_smt_set) { + return pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin), + pctl->devdata, pin, value, arg); + } + + if (arg == PIN_CONFIG_INPUT_ENABLE) + offset = pctl->devdata->ies_offset; + else + offset = pctl->devdata->smt_offset; + + bit = BIT(offset & pctl->devdata->mode_mask); + + if (value) + reg_addr = SET_ADDR(mtk_get_port(pctl, pin) + offset, pctl); + else + reg_addr = CLR_ADDR(mtk_get_port(pctl, pin) + offset, pctl); + + regmap_write(mtk_get_regmap(pctl, pin), reg_addr, bit); + return 0; +} + +int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap, + const struct mtk_pinctrl_devdata *devdata, + unsigned int pin, int value, enum pin_config_param arg) +{ + const struct mtk_pin_ies_smt_set *ies_smt_infos = NULL; + unsigned int i, info_num, reg_addr, bit; + + switch (arg) { + case PIN_CONFIG_INPUT_ENABLE: + ies_smt_infos = devdata->spec_ies; + info_num = devdata->n_spec_ies; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + ies_smt_infos = devdata->spec_smt; + info_num = devdata->n_spec_smt; + break; + default: + break; + } + + if (!ies_smt_infos) + return -EINVAL; + + for (i = 0; i < info_num; i++) { + if (pin >= ies_smt_infos[i].start && + pin <= ies_smt_infos[i].end) { + break; + } + } + + if (i == info_num) + return -EINVAL; + + if (value) + reg_addr = ies_smt_infos[i].offset + devdata->port_align; + else + reg_addr = ies_smt_infos[i].offset + (devdata->port_align << 1); + + bit = BIT(ies_smt_infos[i].bit); + regmap_write(regmap, reg_addr, bit); + return 0; +} + +static const struct mtk_pin_drv_grp *mtk_find_pin_drv_grp_by_pin( + struct mtk_pinctrl *pctl, unsigned long pin) { + int i; + + for (i = 0; i < pctl->devdata->n_pin_drv_grps; i++) { + const struct mtk_pin_drv_grp *pin_drv = + pctl->devdata->pin_drv_grp + i; + if (pin == pin_drv->pin) + return pin_drv; + } + + return NULL; +} + +static int mtk_pconf_set_driving(struct mtk_pinctrl *pctl, + unsigned int pin, unsigned char driving) +{ + const struct mtk_pin_drv_grp *pin_drv; + unsigned int val; + unsigned int bits, mask, shift; + const struct mtk_drv_group_desc *drv_grp; + + if (pin >= pctl->devdata->npins) + return -EINVAL; + + pin_drv = mtk_find_pin_drv_grp_by_pin(pctl, pin); + if (!pin_drv || pin_drv->grp > pctl->devdata->n_grp_cls) + return -EINVAL; + + drv_grp = pctl->devdata->grp_desc + pin_drv->grp; + if (driving >= drv_grp->min_drv && driving <= drv_grp->max_drv + && !(driving % drv_grp->step)) { + val = driving / drv_grp->step - 1; + bits = drv_grp->high_bit - drv_grp->low_bit + 1; + mask = BIT(bits) - 1; + shift = pin_drv->bit + drv_grp->low_bit; + mask <<= shift; + val <<= shift; + return regmap_update_bits(mtk_get_regmap(pctl, pin), + pin_drv->offset, mask, val); + } + + return -EINVAL; +} + +int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap, + const struct mtk_pinctrl_devdata *devdata, + unsigned int pin, bool isup, unsigned int r1r0) +{ + unsigned int i; + unsigned int reg_pupd, reg_set, reg_rst; + unsigned int bit_pupd, bit_r0, bit_r1; + const struct mtk_pin_spec_pupd_set_samereg *spec_pupd_pin; + bool find = false; + + if (!devdata->spec_pupd) + return -EINVAL; + + for (i = 0; i < devdata->n_spec_pupd; i++) { + if (pin == devdata->spec_pupd[i].pin) { + find = true; + break; + } + } + + if (!find) + return -EINVAL; + + spec_pupd_pin = devdata->spec_pupd + i; + reg_set = spec_pupd_pin->offset + devdata->port_align; + reg_rst = spec_pupd_pin->offset + (devdata->port_align << 1); + + if (isup) + reg_pupd = reg_rst; + else + reg_pupd = reg_set; + + bit_pupd = BIT(spec_pupd_pin->pupd_bit); + regmap_write(regmap, reg_pupd, bit_pupd); + + bit_r0 = BIT(spec_pupd_pin->r0_bit); + bit_r1 = BIT(spec_pupd_pin->r1_bit); + + switch (r1r0) { + case MTK_PUPD_SET_R1R0_00: + regmap_write(regmap, reg_rst, bit_r0); + regmap_write(regmap, reg_rst, bit_r1); + break; + case MTK_PUPD_SET_R1R0_01: + regmap_write(regmap, reg_set, bit_r0); + regmap_write(regmap, reg_rst, bit_r1); + break; + case MTK_PUPD_SET_R1R0_10: + regmap_write(regmap, reg_rst, bit_r0); + regmap_write(regmap, reg_set, bit_r1); + break; + case MTK_PUPD_SET_R1R0_11: + regmap_write(regmap, reg_set, bit_r0); + regmap_write(regmap, reg_set, bit_r1); + break; + default: + return -EINVAL; + } + + return 0; +} + +static int mtk_pconf_set_pull_select(struct mtk_pinctrl *pctl, + unsigned int pin, bool enable, bool isup, unsigned int arg) +{ + unsigned int bit; + unsigned int reg_pullen, reg_pullsel, r1r0; + int ret; + + /* Some pins' pull setting are very different, + * they have separate pull up/down bit, R0 and R1 + * resistor bit, so we need this special handle. + */ + if (pctl->devdata->spec_pull_set) { + /* For special pins, bias-disable is set by R1R0, + * the parameter should be "MTK_PUPD_SET_R1R0_00". + */ + r1r0 = enable ? arg : MTK_PUPD_SET_R1R0_00; + ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin), + pctl->devdata, pin, isup, + r1r0); + if (!ret) + return 0; + } + + /* For generic pull config, default arg value should be 0 or 1. */ + if (arg != 0 && arg != 1) { + dev_err(pctl->dev, "invalid pull-up argument %d on pin %d .\n", + arg, pin); + return -EINVAL; + } + + bit = BIT(pin & pctl->devdata->mode_mask); + if (enable) + reg_pullen = SET_ADDR(mtk_get_port(pctl, pin) + + pctl->devdata->pullen_offset, pctl); + else + reg_pullen = CLR_ADDR(mtk_get_port(pctl, pin) + + pctl->devdata->pullen_offset, pctl); + + if (isup) + reg_pullsel = SET_ADDR(mtk_get_port(pctl, pin) + + pctl->devdata->pullsel_offset, pctl); + else + reg_pullsel = CLR_ADDR(mtk_get_port(pctl, pin) + + pctl->devdata->pullsel_offset, pctl); + + regmap_write(mtk_get_regmap(pctl, pin), reg_pullen, bit); + regmap_write(mtk_get_regmap(pctl, pin), reg_pullsel, bit); + return 0; +} + +static int mtk_pconf_parse_conf(struct pinctrl_dev *pctldev, + unsigned int pin, enum pin_config_param param, + enum pin_config_param arg) +{ + int ret = 0; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + ret = mtk_pconf_set_pull_select(pctl, pin, false, false, arg); + break; + case PIN_CONFIG_BIAS_PULL_UP: + ret = mtk_pconf_set_pull_select(pctl, pin, true, true, arg); + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = mtk_pconf_set_pull_select(pctl, pin, true, false, arg); + break; + case PIN_CONFIG_INPUT_ENABLE: + mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); + ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); + break; + case PIN_CONFIG_OUTPUT: + mtk_gpio_set(pctl->chip, pin, arg); + ret = mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false); + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + mtk_pmx_gpio_set_direction(pctldev, NULL, pin, true); + ret = mtk_pconf_set_ies_smt(pctl, pin, arg, param); + break; + case PIN_CONFIG_DRIVE_STRENGTH: + ret = mtk_pconf_set_driving(pctl, pin, arg); + break; + default: + ret = -EINVAL; + } + + return ret; +} + +static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, + unsigned group, + unsigned long *config) +{ + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + *config = pctl->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 *pctl = pinctrl_dev_get_drvdata(pctldev); + struct mtk_pinctrl_group *g = &pctl->groups[group]; + int i, ret; + + for (i = 0; i < num_configs; i++) { + ret = mtk_pconf_parse_conf(pctldev, g->pin, + pinconf_to_config_param(configs[i]), + pinconf_to_config_argument(configs[i])); + if (ret < 0) + return ret; + + g->config = configs[i]; + } + + return 0; +} + +static const struct pinconf_ops mtk_pconf_ops = { + .pin_config_group_get = mtk_pconf_group_get, + .pin_config_group_set = mtk_pconf_group_set, +}; + +static struct mtk_pinctrl_group * +mtk_pctrl_find_group_by_pin(struct mtk_pinctrl *pctl, u32 pin) +{ + int i; + + for (i = 0; i < pctl->ngroups; i++) { + struct mtk_pinctrl_group *grp = pctl->groups + i; + + if (grp->pin == pin) + return grp; + } + + return NULL; +} + +static const struct mtk_desc_function *mtk_pctrl_find_function_by_pin( + struct mtk_pinctrl *pctl, u32 pin_num, u32 fnum) +{ + const struct mtk_desc_pin *pin = pctl->devdata->pins + pin_num; + const struct mtk_desc_function *func = pin->functions; + + while (func && func->name) { + if (func->muxval == fnum) + return func; + func++; + } + + return NULL; +} + +static bool mtk_pctrl_is_function_valid(struct mtk_pinctrl *pctl, + u32 pin_num, u32 fnum) +{ + int i; + + for (i = 0; i < pctl->devdata->npins; i++) { + const struct mtk_desc_pin *pin = pctl->devdata->pins + i; + + if (pin->pin.number == pin_num) { + const struct mtk_desc_function *func = + pin->functions; + + 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 property *pins; + u32 pinfunc, pin, func; + int num_pins, num_funcs, maps_per_pin; + unsigned long *configs; + unsigned int num_configs; + bool has_config = false; + int i, err; + unsigned reserve = 0; + struct mtk_pinctrl_group *grp; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + pins = of_find_property(node, "pinmux", NULL); + if (!pins) { + dev_err(pctl->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 >= pctl->devdata->npins || + func >= ARRAY_SIZE(mtk_gpio_functions)) { + dev_err(pctl->dev, "invalid pins value.\n"); + err = -EINVAL; + goto exit; + } + + grp = mtk_pctrl_find_group_by_pin(pctl, pin); + if (!grp) { + dev_err(pctl->dev, "unable to match pin %d to group\n", + pin); + err = -EINVAL; + goto exit; + } + + err = mtk_pctrl_dt_node_to_map_func(pctl, 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 *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->ngroups; +} + +static const char *mtk_pctrl_get_group_name(struct pinctrl_dev *pctldev, + unsigned group) +{ + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + return pctl->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 *pctl = pinctrl_dev_get_drvdata(pctldev); + + *pins = (unsigned *)&pctl->groups[group].pin; + *num_pins = 1; + + return 0; +} + +static const struct pinctrl_ops mtk_pctrl_ops = { + .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, +}; + +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 *pctl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctl->grp_names; + *num_groups = pctl->ngroups; + + return 0; +} + +static int mtk_pmx_set_mode(struct pinctrl_dev *pctldev, + unsigned long pin, unsigned long mode) +{ + unsigned int reg_addr; + unsigned char bit; + unsigned int val; + unsigned int mask = (1L << GPIO_MODE_BITS) - 1; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + if (pctl->devdata->spec_pinmux_set) + pctl->devdata->spec_pinmux_set(mtk_get_regmap(pctl, pin), + pin, mode); + + reg_addr = ((pin / pctl->devdata->mode_per_reg) << pctl->devdata->port_shf) + + pctl->devdata->pinmux_offset; + + mode &= mask; + bit = pin % pctl->devdata->mode_per_reg; + mask <<= (GPIO_MODE_BITS * bit); + val = (mode << (GPIO_MODE_BITS * bit)); + return regmap_update_bits(mtk_get_regmap(pctl, pin), + reg_addr, mask, val); +} + +static const struct mtk_desc_pin * +mtk_find_pin_by_eint_num(struct mtk_pinctrl *pctl, unsigned int eint_num) +{ + int i; + const struct mtk_desc_pin *pin; + + for (i = 0; i < pctl->devdata->npins; i++) { + pin = pctl->devdata->pins + i; + if (pin->eint.eintnum == eint_num) + return pin; + } + + return NULL; +} + +static int mtk_pmx_set_mux(struct pinctrl_dev *pctldev, + unsigned function, + unsigned group) +{ + bool ret; + const struct mtk_desc_function *desc; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + struct mtk_pinctrl_group *g = pctl->groups + group; + + ret = mtk_pctrl_is_function_valid(pctl, g->pin, function); + if (!ret) { + dev_err(pctl->dev, "invalid function %d on group %d .\n", + function, group); + return -EINVAL; + } + + desc = mtk_pctrl_find_function_by_pin(pctl, g->pin, function); + if (!desc) + return -EINVAL; + mtk_pmx_set_mode(pctldev, g->pin, desc->muxval); + return 0; +} + +static int mtk_pmx_find_gpio_mode(struct mtk_pinctrl *pctl, + unsigned offset) +{ + const struct mtk_desc_pin *pin = pctl->devdata->pins + offset; + const struct mtk_desc_function *func = pin->functions; + + while (func && func->name) { + if (!strncmp(func->name, GPIO_MODE_PREFIX, + sizeof(GPIO_MODE_PREFIX)-1)) + return func->muxval; + func++; + } + return -EINVAL; +} + +static int mtk_pmx_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned offset) +{ + int muxval; + struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); + + muxval = mtk_pmx_find_gpio_mode(pctl, offset); + + if (muxval < 0) { + dev_err(pctl->dev, "invalid gpio pin %d.\n", offset); + return -EINVAL; + } + + mtk_pmx_set_mode(pctldev, offset, muxval); + mtk_pconf_set_ies_smt(pctl, offset, 1, PIN_CONFIG_INPUT_ENABLE); + + return 0; +} + +static const struct pinmux_ops mtk_pmx_ops = { + .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_pmx_gpio_set_direction, + .gpio_request_enable = mtk_pmx_gpio_request_enable, +}; + +static int mtk_gpio_direction_input(struct gpio_chip *chip, + unsigned offset) +{ + return pinctrl_gpio_direction_input(chip->base + offset); +} + +static int mtk_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + mtk_gpio_set(chip, offset, value); + return pinctrl_gpio_direction_output(chip->base + offset); +} + +static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + unsigned int reg_addr; + unsigned int bit; + unsigned int read_val = 0; + + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + + reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset; + bit = BIT(offset & pctl->devdata->mode_mask); + + if (pctl->devdata->spec_dir_set) + pctl->devdata->spec_dir_set(®_addr, offset); + + regmap_read(pctl->regmap1, reg_addr, &read_val); + if (read_val & bit) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +static int mtk_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + unsigned int reg_addr; + unsigned int bit; + unsigned int read_val = 0; + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + + reg_addr = mtk_get_port(pctl, offset) + + pctl->devdata->din_offset; + + bit = BIT(offset & pctl->devdata->mode_mask); + regmap_read(pctl->regmap1, reg_addr, &read_val); + return !!(read_val & bit); +} + +static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +{ + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + const struct mtk_desc_pin *pin; + unsigned long eint_n; + + pin = pctl->devdata->pins + offset; + if (pin->eint.eintnum == NO_EINT_SUPPORT) + return -EINVAL; + + eint_n = pin->eint.eintnum; + + return mtk_eint_find_irq(pctl->eint, eint_n); +} + +static int mtk_gpio_set_config(struct gpio_chip *chip, unsigned offset, + unsigned long config) +{ + struct mtk_pinctrl *pctl = gpiochip_get_data(chip); + const struct mtk_desc_pin *pin; + unsigned long eint_n; + u32 debounce; + + if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE) + return -ENOTSUPP; + + pin = pctl->devdata->pins + offset; + if (pin->eint.eintnum == NO_EINT_SUPPORT) + return -EINVAL; + + debounce = pinconf_to_config_argument(config); + eint_n = pin->eint.eintnum; + + return mtk_eint_set_debounce(pctl->eint, eint_n, debounce); +} + +static const struct gpio_chip mtk_gpio_chip = { + .owner = THIS_MODULE, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .get_direction = mtk_gpio_get_direction, + .direction_input = mtk_gpio_direction_input, + .direction_output = mtk_gpio_direction_output, + .get = mtk_gpio_get, + .set = mtk_gpio_set, + .to_irq = mtk_gpio_to_irq, + .set_config = mtk_gpio_set_config, + .of_gpio_n_cells = 2, +}; + +static int mtk_eint_suspend(struct device *device) +{ + struct mtk_pinctrl *pctl = dev_get_drvdata(device); + + return mtk_eint_do_suspend(pctl->eint); +} + +static int mtk_eint_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_eint_pm_ops = { + .suspend_noirq = mtk_eint_suspend, + .resume_noirq = mtk_eint_resume, +}; + +static int mtk_pctrl_build_state(struct platform_device *pdev) +{ + struct mtk_pinctrl *pctl = platform_get_drvdata(pdev); + int i; + + pctl->ngroups = pctl->devdata->npins; + + /* Allocate groups */ + pctl->groups = devm_kcalloc(&pdev->dev, pctl->ngroups, + sizeof(*pctl->groups), GFP_KERNEL); + if (!pctl->groups) + return -ENOMEM; + + /* We assume that one pin is one group, use pin name as group name. */ + pctl->grp_names = devm_kcalloc(&pdev->dev, pctl->ngroups, + sizeof(*pctl->grp_names), GFP_KERNEL); + if (!pctl->grp_names) + return -ENOMEM; + + for (i = 0; i < pctl->devdata->npins; i++) { + const struct mtk_desc_pin *pin = pctl->devdata->pins + i; + struct mtk_pinctrl_group *group = pctl->groups + i; + + group->name = pin->pin.name; + group->pin = pin->pin.number; + + pctl->grp_names[i] = pin->pin.name; + } + + return 0; +} + +static int +mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n, + struct gpio_chip **gpio_chip) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + *gpio_chip = pctl->chip; + *gpio_n = pin->pin.number; + + return 0; +} + +static int mtk_xt_get_gpio_state(void *data, unsigned long eint_n) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + return mtk_gpio_get(pctl->chip, pin->pin.number); +} + +static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n) +{ + struct mtk_pinctrl *pctl = (struct mtk_pinctrl *)data; + const struct mtk_desc_pin *pin; + + pin = mtk_find_pin_by_eint_num(pctl, eint_n); + if (!pin) + return -EINVAL; + + /* set mux to INT mode */ + mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux); + /* set gpio direction to input */ + mtk_pmx_gpio_set_direction(pctl->pctl_dev, NULL, pin->pin.number, + true); + /* set input-enable */ + mtk_pconf_set_ies_smt(pctl, pin->pin.number, 1, + PIN_CONFIG_INPUT_ENABLE); + + return 0; +} + +static const struct mtk_eint_xt mtk_eint_xt = { + .get_gpio_n = mtk_xt_get_gpio_n, + .get_gpio_state = mtk_xt_get_gpio_state, + .set_gpio_as_eint = mtk_xt_set_gpio_as_eint, +}; + +static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + + if (!of_property_read_bool(np, "interrupt-controller")) + return -ENODEV; + + pctl->eint = devm_kzalloc(pctl->dev, sizeof(*pctl->eint), GFP_KERNEL); + if (!pctl->eint) + return -ENOMEM; + + pctl->eint->base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pctl->eint->base)) + return PTR_ERR(pctl->eint->base); + + pctl->eint->irq = irq_of_parse_and_map(np, 0); + if (!pctl->eint->irq) + return -EINVAL; + + pctl->eint->dev = &pdev->dev; + /* + * If pctl->eint->regs == NULL, it would fall back into using a generic + * register map in mtk_eint_do_init calls. + */ + pctl->eint->regs = pctl->devdata->eint_regs; + pctl->eint->hw = &pctl->devdata->eint_hw; + pctl->eint->pctl = pctl; + pctl->eint->gpio_xlate = &mtk_eint_xt; + + return mtk_eint_do_init(pctl->eint); +} + +/* This is used as a common probe function */ +int mtk_pctrl_init(struct platform_device *pdev, + const struct mtk_pinctrl_devdata *data, + struct regmap *regmap) +{ + struct device *dev = &pdev->dev; + struct pinctrl_pin_desc *pins; + struct mtk_pinctrl *pctl; + struct device_node *np = pdev->dev.of_node, *node; + struct property *prop; + int ret, i; + + pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); + if (!pctl) + return -ENOMEM; + + platform_set_drvdata(pdev, pctl); + + prop = of_find_property(np, "pins-are-numbered", NULL); + if (!prop) + return dev_err_probe(dev, -EINVAL, + "only support pins-are-numbered format\n"); + + node = of_parse_phandle(np, "mediatek,pctl-regmap", 0); + if (node) { + pctl->regmap1 = syscon_node_to_regmap(node); + of_node_put(node); + if (IS_ERR(pctl->regmap1)) + return PTR_ERR(pctl->regmap1); + } else if (regmap) { + pctl->regmap1 = regmap; + } else { + return dev_err_probe(dev, -EINVAL, "Cannot find pinctrl regmap.\n"); + } + + /* Only 8135 has two base addr, other SoCs have only one. */ + node = of_parse_phandle(np, "mediatek,pctl-regmap", 1); + if (node) { + pctl->regmap2 = syscon_node_to_regmap(node); + of_node_put(node); + if (IS_ERR(pctl->regmap2)) + return PTR_ERR(pctl->regmap2); + } + + pctl->devdata = data; + ret = mtk_pctrl_build_state(pdev); + if (ret) + return dev_err_probe(dev, ret, "build state failed\n"); + + pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins), + GFP_KERNEL); + if (!pins) + return -ENOMEM; + + for (i = 0; i < pctl->devdata->npins; i++) + pins[i] = pctl->devdata->pins[i].pin; + + pctl->pctl_desc.name = dev_name(&pdev->dev); + pctl->pctl_desc.owner = THIS_MODULE; + pctl->pctl_desc.pins = pins; + pctl->pctl_desc.npins = pctl->devdata->npins; + pctl->pctl_desc.confops = &mtk_pconf_ops; + pctl->pctl_desc.pctlops = &mtk_pctrl_ops; + pctl->pctl_desc.pmxops = &mtk_pmx_ops; + pctl->dev = &pdev->dev; + + pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc, + pctl); + if (IS_ERR(pctl->pctl_dev)) + return dev_err_probe(dev, PTR_ERR(pctl->pctl_dev), + "Couldn't register pinctrl driver\n"); + + pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); + if (!pctl->chip) + return -ENOMEM; + + *pctl->chip = mtk_gpio_chip; + pctl->chip->ngpio = pctl->devdata->npins; + pctl->chip->label = dev_name(&pdev->dev); + pctl->chip->parent = &pdev->dev; + pctl->chip->base = -1; + + ret = gpiochip_add_data(pctl->chip, pctl); + if (ret) + return -EINVAL; + + /* Register the GPIO to pin mappings. */ + ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), + 0, 0, pctl->devdata->npins); + if (ret) { + ret = -EINVAL; + goto chip_error; + } + + ret = mtk_eint_init(pctl, pdev); + if (ret) + goto chip_error; + + return 0; + +chip_error: + gpiochip_remove(pctl->chip); + return ret; +} + +int mtk_pctrl_common_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct mtk_pinctrl_devdata *data = device_get_match_data(dev); + + if (!data) + return -ENODEV; + + return mtk_pctrl_init(pdev, data, NULL); +} |