--- /dev/null
+/*
+ * mt65xx pinctrl driver based on Allwinner A1X pinctrl driver.
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Hongzhou.Yang <hongzhou.yang@mediatek.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/io.h>
+#include <linux/gpio.h>
+#include <linux/module.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 <dt-bindings/pinctrl/mt65xx.h>
+
+#include "../core.h"
+#include "../pinconf.h"
+#include "../pinctrl-utils.h"
+#include "pinctrl-mtk-common.h"
+
+#define MAX_GPIO_MODE_PER_REG 5
+#define GPIO_MODE_BITS 3
+
+static const char * const mtk_gpio_functions[] = {
+ "func0", "func1", "func2", "func3",
+ "func4", "func5", "func6", "func7",
+};
+
+/*
+ * 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 >> 4) & 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 & 0xf);
+
+ 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 = dev_get_drvdata(chip->dev);
+
+ reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dout_offset;
+ bit = BIT(offset & 0xf);
+
+ 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 void mtk_pconf_set_ies_smt(struct mtk_pinctrl *pctl, unsigned pin,
+ int value, enum pin_config_param param)
+{
+ unsigned int reg_addr, offset;
+ unsigned int bit;
+ int ret;
+
+ /*
+ * Due to some pins are irregular, their input enable and smt
+ * control register are discontinuous, but they are mapping together.
+ * So we need this special handle.
+ */
+ if (pctl->devdata->spec_ies_smt_set) {
+ ret = pctl->devdata->spec_ies_smt_set(mtk_get_regmap(pctl, pin),
+ pin, pctl->devdata->port_align, value);
+ if (!ret)
+ return;
+ }
+
+ bit = BIT(pin & 0xf);
+
+ if (param == PIN_CONFIG_INPUT_ENABLE)
+ offset = pctl->devdata->ies_offset;
+ else
+ offset = pctl->devdata->smt_offset;
+
+ 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);
+}
+
+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;
+}
+
+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;
+ 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) {
+ ret = pctl->devdata->spec_pull_set(mtk_get_regmap(pctl, pin),
+ pin, pctl->devdata->port_align, isup, arg);
+ 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 & 0xf);
+ 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)
+{
+ struct mtk_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mtk_pconf_set_pull_select(pctl, pin, false, false, arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ mtk_pconf_set_pull_select(pctl, pin, true, true, arg);
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ mtk_pconf_set_pull_select(pctl, pin, true, false, arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mtk_pconf_set_ies_smt(pctl, pin, arg, param);
+ break;
+ case PIN_CONFIG_OUTPUT:
+ mtk_gpio_set(pctl->chip, pin, arg);
+ mtk_pmx_gpio_set_direction(pctldev, NULL, pin, false);
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mtk_pconf_set_ies_smt(pctl, pin, arg, param);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ mtk_pconf_set_driving(pctl, pin, arg);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+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;
+
+ for (i = 0; i < num_configs; i++) {
+ mtk_pconf_parse_conf(pctldev, g->pin,
+ pinconf_to_config_param(configs[i]),
+ pinconf_to_config_argument(configs[i]));
+
+ 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 = 0;
+ 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 %s .\n",
+ node->name);
+ return -EINVAL;
+ }
+
+ err = pinconf_generic_parse_dt_config(node, pctldev, &configs,
+ &num_configs);
+ if (num_configs)
+ has_config = 1;
+
+ 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)
+ return -EINVAL;
+
+ reserve = num_pins * maps_per_pin;
+
+ err = pinctrl_utils_reserve_map(pctldev, map,
+ reserved_maps, num_maps, reserve);
+ if (err < 0)
+ goto fail;
+
+ for (i = 0; i < num_pins; i++) {
+ err = of_property_read_u32_index(node, "pinmux",
+ i, &pinfunc);
+ if (err)
+ goto fail;
+
+ 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 fail;
+ }
+
+ grp = mtk_pctrl_find_group_by_pin(pctl, pin);
+ if (!grp) {
+ dev_err(pctl->dev, "unable to match pin %d to group\n",
+ pin);
+ return -EINVAL;
+ }
+
+ err = mtk_pctrl_dt_node_to_map_func(pctl, pin, func, grp, map,
+ reserved_maps, num_maps);
+ if (err < 0)
+ goto fail;
+
+ 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 fail;
+ }
+ }
+
+ return 0;
+
+fail:
+ 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_dt_free_map(pctldev, *map, *num_maps);
+ 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_dt_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);
+
+ reg_addr = ((pin / MAX_GPIO_MODE_PER_REG) << pctl->devdata->port_shf)
+ + pctl->devdata->pinmux_offset;
+
+ bit = pin % MAX_GPIO_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, "invaild 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 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,
+};
+
+static int mtk_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+ return pinctrl_request_gpio(chip->base + offset);
+}
+
+static void mtk_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+ pinctrl_free_gpio(chip->base + offset);
+}
+
+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 = dev_get_drvdata(chip->dev);
+
+ reg_addr = mtk_get_port(pctl, offset) + pctl->devdata->dir_offset;
+ bit = BIT(offset & 0xf);
+ regmap_read(pctl->regmap1, reg_addr, &read_val);
+ return !!(read_val & bit);
+}
+
+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 = dev_get_drvdata(chip->dev);
+
+ if (mtk_gpio_get_direction(chip, offset))
+ reg_addr = mtk_get_port(pctl, offset) +
+ pctl->devdata->dout_offset;
+ else
+ reg_addr = mtk_get_port(pctl, offset) +
+ pctl->devdata->din_offset;
+
+ bit = BIT(offset & 0xf);
+ regmap_read(pctl->regmap1, reg_addr, &read_val);
+ return !!(read_val & bit);
+}
+
+static int mtk_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+ const struct mtk_desc_pin *pin;
+ struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
+ int irq;
+
+ pin = pctl->devdata->pins + offset;
+ if (pin->eint.eintnum == NO_EINT_SUPPORT)
+ return -EINVAL;
+
+ irq = irq_find_mapping(pctl->domain, pin->eint.eintnum);
+ if (!irq)
+ return -EINVAL;
+
+ return irq;
+}
+
+static int mtk_pinctrl_irq_request_resources(struct irq_data *d)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_desc_pin *pin;
+ int ret;
+
+ pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
+
+ if (!pin) {
+ dev_err(pctl->dev, "Can not find pin\n");
+ return -EINVAL;
+ }
+
+ ret = gpiochip_lock_as_irq(pctl->chip, pin->pin.number);
+ if (ret) {
+ dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n",
+ irqd_to_hwirq(d));
+ return ret;
+ }
+
+ /* set mux to INT mode */
+ mtk_pmx_set_mode(pctl->pctl_dev, pin->pin.number, pin->eint.eintmux);
+
+ return 0;
+}
+
+static void mtk_pinctrl_irq_release_resources(struct irq_data *d)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_desc_pin *pin;
+
+ pin = mtk_find_pin_by_eint_num(pctl, d->hwirq);
+
+ if (!pin) {
+ dev_err(pctl->dev, "Can not find pin\n");
+ return;
+ }
+
+ gpiochip_unlock_as_irq(pctl->chip, pin->pin.number);
+}
+
+static void __iomem *mtk_eint_get_offset(struct mtk_pinctrl *pctl,
+ unsigned int eint_num, unsigned int offset)
+{
+ unsigned int eint_base = 0;
+ void __iomem *reg;
+
+ if (eint_num >= pctl->devdata->ap_num)
+ eint_base = pctl->devdata->ap_num;
+
+ reg = pctl->eint_reg_base + offset + ((eint_num - eint_base) / 32) * 4;
+
+ return reg;
+}
+
+/*
+ * mtk_can_en_debounce: Check the EINT number is able to enable debounce or not
+ * @eint_num: the EINT number to setmtk_pinctrl
+ */
+static unsigned int mtk_eint_can_en_debounce(struct mtk_pinctrl *pctl,
+ unsigned int eint_num)
+{
+ unsigned int sens;
+ unsigned int bit = BIT(eint_num % 32);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+
+ void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
+ eint_offsets->sens);
+
+ if (readl(reg) & bit)
+ sens = MT_LEVEL_SENSITIVE;
+ else
+ sens = MT_EDGE_SENSITIVE;
+
+ if ((eint_num < pctl->devdata->db_cnt) && (sens != MT_EDGE_SENSITIVE))
+ return 1;
+ else
+ return 0;
+}
+
+/*
+ * mtk_eint_get_mask: To get the eint mask
+ * @eint_num: the EINT number to get
+ */
+static unsigned int mtk_eint_get_mask(struct mtk_pinctrl *pctl,
+ unsigned int eint_num)
+{
+ unsigned int bit = BIT(eint_num % 32);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+
+ void __iomem *reg = mtk_eint_get_offset(pctl, eint_num,
+ eint_offsets->mask);
+
+ return !!(readl(reg) & bit);
+}
+
+static int mtk_eint_flip_edge(struct mtk_pinctrl *pctl, int hwirq)
+{
+ int start_level, curr_level;
+ unsigned int reg_offset;
+ const struct mtk_eint_offsets *eint_offsets = &(pctl->devdata->eint_offsets);
+ u32 mask = 1 << (hwirq & 0x1f);
+ u32 port = (hwirq >> 5) & eint_offsets->port_mask;
+ void __iomem *reg = pctl->eint_reg_base + (port << 2);
+ const struct mtk_desc_pin *pin;
+
+ pin = mtk_find_pin_by_eint_num(pctl, hwirq);
+ curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
+ do {
+ start_level = curr_level;
+ if (start_level)
+ reg_offset = eint_offsets->pol_clr;
+ else
+ reg_offset = eint_offsets->pol_set;
+ writel(mask, reg + reg_offset);
+
+ curr_level = mtk_gpio_get(pctl->chip, pin->pin.number);
+ } while (start_level != curr_level);
+
+ return start_level;
+}
+
+static void mtk_eint_mask(struct irq_data *d)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->mask_set);
+
+ writel(mask, reg);
+}
+
+static void mtk_eint_unmask(struct irq_data *d)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->mask_clr);
+
+ writel(mask, reg);
+
+ if (pctl->eint_dual_edges[d->hwirq])
+ mtk_eint_flip_edge(pctl, d->hwirq);
+}
+
+static int mtk_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
+ unsigned debounce)
+{
+ struct mtk_pinctrl *pctl = dev_get_drvdata(chip->dev);
+ int eint_num, virq, eint_offset;
+ unsigned int set_offset, bit, clr_bit, clr_offset, rst, i, unmask, dbnc;
+ static const unsigned int dbnc_arr[] = {0 , 1, 16, 32, 64, 128, 256};
+ const struct mtk_desc_pin *pin;
+ struct irq_data *d;
+
+ pin = pctl->devdata->pins + offset;
+ if (pin->eint.eintnum == NO_EINT_SUPPORT)
+ return -EINVAL;
+
+ eint_num = pin->eint.eintnum;
+ virq = irq_find_mapping(pctl->domain, eint_num);
+ eint_offset = (eint_num % 4) * 8;
+ d = irq_get_irq_data(virq);
+
+ set_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_set;
+ clr_offset = (eint_num / 4) * 4 + pctl->devdata->eint_offsets.dbnc_clr;
+ if (!mtk_eint_can_en_debounce(pctl, eint_num))
+ return -ENOSYS;
+
+ dbnc = ARRAY_SIZE(dbnc_arr);
+ for (i = 0; i < ARRAY_SIZE(dbnc_arr); i++) {
+ if (debounce <= dbnc_arr[i]) {
+ dbnc = i;
+ break;
+ }
+ }
+
+ if (!mtk_eint_get_mask(pctl, eint_num)) {
+ mtk_eint_mask(d);
+ unmask = 1;
+ } else {
+ unmask = 0;
+ }
+
+ clr_bit = 0xff << eint_offset;
+ writel(clr_bit, pctl->eint_reg_base + clr_offset);
+
+ bit = ((dbnc << EINT_DBNC_SET_DBNC_BITS) | EINT_DBNC_SET_EN) <<
+ eint_offset;
+ rst = EINT_DBNC_RST_BIT << eint_offset;
+ writel(rst | bit, pctl->eint_reg_base + set_offset);
+
+ /* Delay a while (more than 2T) to wait for hw debounce counter reset
+ work correctly */
+ udelay(1);
+ if (unmask == 1)
+ mtk_eint_unmask(d);
+
+ return 0;
+}
+
+static struct gpio_chip mtk_gpio_chip = {
+ .owner = THIS_MODULE,
+ .request = mtk_gpio_request,
+ .free = mtk_gpio_free,
+ .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_debounce = mtk_gpio_set_debounce,
+ .of_gpio_n_cells = 2,
+};
+
+static int mtk_eint_set_type(struct irq_data *d,
+ unsigned int type)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg;
+
+ if (((type & IRQ_TYPE_EDGE_BOTH) && (type & IRQ_TYPE_LEVEL_MASK)) ||
+ ((type & IRQ_TYPE_LEVEL_MASK) == IRQ_TYPE_LEVEL_MASK)) {
+ dev_err(pctl->dev, "Can't configure IRQ%d (EINT%lu) for type 0x%X\n",
+ d->irq, d->hwirq, type);
+ return -EINVAL;
+ }
+
+ if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
+ pctl->eint_dual_edges[d->hwirq] = 1;
+ else
+ pctl->eint_dual_edges[d->hwirq] = 0;
+
+ if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_EDGE_FALLING)) {
+ reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->pol_clr);
+ writel(mask, reg);
+ } else {
+ reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->pol_set);
+ writel(mask, reg);
+ }
+
+ if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+ reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->sens_clr);
+ writel(mask, reg);
+ } else {
+ reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->sens_set);
+ writel(mask, reg);
+ }
+
+ if (pctl->eint_dual_edges[d->hwirq])
+ mtk_eint_flip_edge(pctl, d->hwirq);
+
+ return 0;
+}
+
+static void mtk_eint_ack(struct irq_data *d)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ u32 mask = BIT(d->hwirq & 0x1f);
+ void __iomem *reg = mtk_eint_get_offset(pctl, d->hwirq,
+ eint_offsets->ack);
+
+ writel(mask, reg);
+}
+
+static struct irq_chip mtk_pinctrl_irq_chip = {
+ .name = "mt-eint",
+ .irq_mask = mtk_eint_mask,
+ .irq_unmask = mtk_eint_unmask,
+ .irq_ack = mtk_eint_ack,
+ .irq_set_type = mtk_eint_set_type,
+ .irq_request_resources = mtk_pinctrl_irq_request_resources,
+ .irq_release_resources = mtk_pinctrl_irq_release_resources,
+};
+
+static unsigned int mtk_eint_init(struct mtk_pinctrl *pctl)
+{
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ void __iomem *reg = pctl->eint_reg_base + eint_offsets->dom_en;
+ unsigned int i;
+
+ for (i = 0; i < pctl->devdata->ap_num; i += 32) {
+ writel(0xffffffff, reg);
+ reg += 4;
+ }
+ return 0;
+}
+
+static inline void
+mtk_eint_debounce_process(struct mtk_pinctrl *pctl, int index)
+{
+ unsigned int rst, ctrl_offset;
+ unsigned int bit, dbnc;
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+
+ ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_ctrl;
+ dbnc = readl(pctl->eint_reg_base + ctrl_offset);
+ bit = EINT_DBNC_SET_EN << ((index % 4) * 8);
+ if ((bit & dbnc) > 0) {
+ ctrl_offset = (index / 4) * 4 + eint_offsets->dbnc_set;
+ rst = EINT_DBNC_RST_BIT << ((index % 4) * 8);
+ writel(rst, pctl->eint_reg_base + ctrl_offset);
+ }
+}
+
+static void mtk_eint_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_get_chip(irq);
+ struct mtk_pinctrl *pctl = irq_get_handler_data(irq);
+ unsigned int status, eint_num;
+ int offset, index, virq;
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+ void __iomem *reg = mtk_eint_get_offset(pctl, 0, eint_offsets->stat);
+ int dual_edges, start_level, curr_level;
+ const struct mtk_desc_pin *pin;
+
+ chained_irq_enter(chip, desc);
+ for (eint_num = 0; eint_num < pctl->devdata->ap_num; eint_num += 32) {
+ status = readl(reg);
+ reg += 4;
+ while (status) {
+ offset = __ffs(status);
+ index = eint_num + offset;
+ virq = irq_find_mapping(pctl->domain, index);
+ status &= ~BIT(offset);
+
+ dual_edges = pctl->eint_dual_edges[index];
+ if (dual_edges) {
+ /* Clear soft-irq in case we raised it
+ last time */
+ writel(BIT(offset), reg - eint_offsets->stat +
+ eint_offsets->soft_clr);
+
+ pin = mtk_find_pin_by_eint_num(pctl, index);
+ start_level = mtk_gpio_get(pctl->chip,
+ pin->pin.number);
+ }
+
+ generic_handle_irq(virq);
+
+ if (dual_edges) {
+ curr_level = mtk_eint_flip_edge(pctl, index);
+
+ /* If level changed, we might lost one edge
+ interrupt, raised it through soft-irq */
+ if (start_level != curr_level)
+ writel(BIT(offset), reg -
+ eint_offsets->stat +
+ eint_offsets->soft_set);
+ }
+
+ if (index < pctl->devdata->db_cnt)
+ mtk_eint_debounce_process(pctl , index);
+ }
+ }
+ chained_irq_exit(chip, desc);
+}
+
+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 struct pinctrl_desc mtk_pctrl_desc = {
+ .confops = &mtk_pconf_ops,
+ .pctlops = &mtk_pctrl_ops,
+ .pmxops = &mtk_pmx_ops,
+};
+
+int mtk_pctrl_init(struct platform_device *pdev,
+ const struct mtk_pinctrl_devdata *data)
+{
+ struct pinctrl_pin_desc *pins;
+ struct mtk_pinctrl *pctl;
+ struct device_node *np = pdev->dev.of_node, *node;
+ struct property *prop;
+ struct resource *res;
+ int i, ret, irq;
+
+ 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) {
+ dev_err(&pdev->dev, "only support pins-are-numbered format\n");
+ return -EINVAL;
+ }
+
+ node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
+ if (node) {
+ pctl->regmap1 = syscon_node_to_regmap(node);
+ if (IS_ERR(pctl->regmap1))
+ return PTR_ERR(pctl->regmap1);
+ }
+
+ /* 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);
+ if (IS_ERR(pctl->regmap2))
+ return PTR_ERR(pctl->regmap2);
+ }
+
+ pctl->devdata = data;
+ ret = mtk_pctrl_build_state(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "build state failed: %d\n", ret);
+ return -EINVAL;
+ }
+
+ 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;
+ mtk_pctrl_desc.name = dev_name(&pdev->dev);
+ mtk_pctrl_desc.owner = THIS_MODULE;
+ mtk_pctrl_desc.pins = pins;
+ mtk_pctrl_desc.npins = pctl->devdata->npins;
+ pctl->dev = &pdev->dev;
+ pctl->pctl_dev = pinctrl_register(&mtk_pctrl_desc, &pdev->dev, pctl);
+ if (!pctl->pctl_dev) {
+ dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
+ return -EINVAL;
+ }
+
+ pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
+ if (!pctl->chip) {
+ ret = -ENOMEM;
+ goto pctrl_error;
+ }
+
+ pctl->chip = &mtk_gpio_chip;
+ pctl->chip->ngpio = pctl->devdata->npins;
+ pctl->chip->label = dev_name(&pdev->dev);
+ pctl->chip->dev = &pdev->dev;
+ pctl->chip->base = 0;
+
+ ret = gpiochip_add(pctl->chip);
+ if (ret) {
+ ret = -EINVAL;
+ goto pctrl_error;
+ }
+
+ /* 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;
+ }
+
+ /* Get EINT register base from dts. */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(&pdev->dev, "Unable to get Pinctrl resource\n");
+ ret = -EINVAL;
+ goto chip_error;
+ }
+
+ pctl->eint_reg_base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(pctl->eint_reg_base)) {
+ ret = -EINVAL;
+ goto chip_error;
+ }
+
+ pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num,
+ sizeof(int), GFP_KERNEL);
+ if (!pctl->eint_dual_edges) {
+ ret = -ENOMEM;
+ goto chip_error;
+ }
+
+ irq = irq_of_parse_and_map(np, 0);
+ if (!irq) {
+ dev_err(&pdev->dev, "couldn't parse and map irq\n");
+ ret = -EINVAL;
+ goto chip_error;
+ }
+
+ pctl->domain = irq_domain_add_linear(np,
+ pctl->devdata->ap_num, &irq_domain_simple_ops, NULL);
+ if (!pctl->domain) {
+ dev_err(&pdev->dev, "Couldn't register IRQ domain\n");
+ ret = -ENOMEM;
+ goto chip_error;
+ }
+
+ mtk_eint_init(pctl);
+ for (i = 0; i < pctl->devdata->ap_num; i++) {
+ int virq = irq_create_mapping(pctl->domain, i);
+
+ irq_set_chip_and_handler(virq, &mtk_pinctrl_irq_chip,
+ handle_level_irq);
+ irq_set_chip_data(virq, pctl);
+ set_irq_flags(virq, IRQF_VALID);
+ };
+
+ irq_set_chained_handler(irq, mtk_eint_irq_handler);
+ irq_set_handler_data(irq, pctl);
+ set_irq_flags(irq, IRQF_VALID);
+ return 0;
+
+chip_error:
+ gpiochip_remove(pctl->chip);
+pctrl_error:
+ pinctrl_unregister(pctl->pctl_dev);
+ return ret;
+}
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("MediaTek Pinctrl Driver");
+MODULE_AUTHOR("Hongzhou Yang <hongzhou.yang@mediatek.com>");
Code Review / kvmfornfv.git / blobdiff