| /* |
| * Allwinner A1X SoCs pinctrl driver. |
| * |
| * Copyright (C) 2012 Maxime Ripard |
| * |
| * Maxime Ripard <maxime.ripard@free-electrons.com> |
| * |
| * This file is licensed under the terms of the GNU General Public |
| * License version 2. This program is licensed "as is" without any |
| * warranty of any kind, whether express or implied. |
| */ |
| |
| #include <linux/io.h> |
| #include <linux/clk.h> |
| #include <linux/gpio.h> |
| #include <linux/irqdomain.h> |
| #include <linux/irqchip/chained_irq.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/pinctrl.h> |
| #include <linux/pinctrl/pinconf-generic.h> |
| #include <linux/pinctrl/pinmux.h> |
| #include <linux/platform_device.h> |
| #include <linux/slab.h> |
| |
| #include "../core.h" |
| #include "../../gpio/gpiolib.h" |
| #include "pinctrl-sunxi.h" |
| |
| static struct irq_chip sunxi_pinctrl_edge_irq_chip; |
| static struct irq_chip sunxi_pinctrl_level_irq_chip; |
| |
| static struct sunxi_pinctrl_group * |
| sunxi_pinctrl_find_group_by_name(struct sunxi_pinctrl *pctl, const char *group) |
| { |
| int i; |
| |
| for (i = 0; i < pctl->ngroups; i++) { |
| struct sunxi_pinctrl_group *grp = pctl->groups + i; |
| |
| if (!strcmp(grp->name, group)) |
| return grp; |
| } |
| |
| return NULL; |
| } |
| |
| static struct sunxi_pinctrl_function * |
| sunxi_pinctrl_find_function_by_name(struct sunxi_pinctrl *pctl, |
| const char *name) |
| { |
| struct sunxi_pinctrl_function *func = pctl->functions; |
| int i; |
| |
| for (i = 0; i < pctl->nfunctions; i++) { |
| if (!func[i].name) |
| break; |
| |
| if (!strcmp(func[i].name, name)) |
| return func + i; |
| } |
| |
| return NULL; |
| } |
| |
| static struct sunxi_desc_function * |
| sunxi_pinctrl_desc_find_function_by_name(struct sunxi_pinctrl *pctl, |
| const char *pin_name, |
| const char *func_name) |
| { |
| int i; |
| |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| |
| if (!strcmp(pin->pin.name, pin_name)) { |
| struct sunxi_desc_function *func = pin->functions; |
| |
| while (func->name) { |
| if (!strcmp(func->name, func_name)) |
| return func; |
| |
| func++; |
| } |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static struct sunxi_desc_function * |
| sunxi_pinctrl_desc_find_function_by_pin(struct sunxi_pinctrl *pctl, |
| const u16 pin_num, |
| const char *func_name) |
| { |
| int i; |
| |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| |
| if (pin->pin.number == pin_num) { |
| struct sunxi_desc_function *func = pin->functions; |
| |
| while (func->name) { |
| if (!strcmp(func->name, func_name)) |
| return func; |
| |
| func++; |
| } |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static int sunxi_pctrl_get_groups_count(struct pinctrl_dev *pctldev) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| return pctl->ngroups; |
| } |
| |
| static const char *sunxi_pctrl_get_group_name(struct pinctrl_dev *pctldev, |
| unsigned group) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| return pctl->groups[group].name; |
| } |
| |
| static int sunxi_pctrl_get_group_pins(struct pinctrl_dev *pctldev, |
| unsigned group, |
| const unsigned **pins, |
| unsigned *num_pins) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| *pins = (unsigned *)&pctl->groups[group].pin; |
| *num_pins = 1; |
| |
| return 0; |
| } |
| |
| static int sunxi_pctrl_dt_node_to_map(struct pinctrl_dev *pctldev, |
| struct device_node *node, |
| struct pinctrl_map **map, |
| unsigned *num_maps) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| unsigned long *pinconfig; |
| struct property *prop; |
| const char *function; |
| const char *group; |
| int ret, nmaps, i = 0; |
| u32 val; |
| |
| *map = NULL; |
| *num_maps = 0; |
| |
| ret = of_property_read_string(node, "allwinner,function", &function); |
| if (ret) { |
| dev_err(pctl->dev, |
| "missing allwinner,function property in node %s\n", |
| node->name); |
| return -EINVAL; |
| } |
| |
| nmaps = of_property_count_strings(node, "allwinner,pins") * 2; |
| if (nmaps < 0) { |
| dev_err(pctl->dev, |
| "missing allwinner,pins property in node %s\n", |
| node->name); |
| return -EINVAL; |
| } |
| |
| *map = kmalloc(nmaps * sizeof(struct pinctrl_map), GFP_KERNEL); |
| if (!*map) |
| return -ENOMEM; |
| |
| of_property_for_each_string(node, "allwinner,pins", prop, group) { |
| struct sunxi_pinctrl_group *grp = |
| sunxi_pinctrl_find_group_by_name(pctl, group); |
| int j = 0, configlen = 0; |
| |
| if (!grp) { |
| dev_err(pctl->dev, "unknown pin %s", group); |
| continue; |
| } |
| |
| if (!sunxi_pinctrl_desc_find_function_by_name(pctl, |
| grp->name, |
| function)) { |
| dev_err(pctl->dev, "unsupported function %s on pin %s", |
| function, group); |
| continue; |
| } |
| |
| (*map)[i].type = PIN_MAP_TYPE_MUX_GROUP; |
| (*map)[i].data.mux.group = group; |
| (*map)[i].data.mux.function = function; |
| |
| i++; |
| |
| (*map)[i].type = PIN_MAP_TYPE_CONFIGS_GROUP; |
| (*map)[i].data.configs.group_or_pin = group; |
| |
| if (of_find_property(node, "allwinner,drive", NULL)) |
| configlen++; |
| if (of_find_property(node, "allwinner,pull", NULL)) |
| configlen++; |
| |
| pinconfig = kzalloc(configlen * sizeof(*pinconfig), GFP_KERNEL); |
| if (!pinconfig) { |
| kfree(*map); |
| return -ENOMEM; |
| } |
| |
| if (!of_property_read_u32(node, "allwinner,drive", &val)) { |
| u16 strength = (val + 1) * 10; |
| pinconfig[j++] = |
| pinconf_to_config_packed(PIN_CONFIG_DRIVE_STRENGTH, |
| strength); |
| } |
| |
| if (!of_property_read_u32(node, "allwinner,pull", &val)) { |
| enum pin_config_param pull = PIN_CONFIG_END; |
| if (val == 1) |
| pull = PIN_CONFIG_BIAS_PULL_UP; |
| else if (val == 2) |
| pull = PIN_CONFIG_BIAS_PULL_DOWN; |
| pinconfig[j++] = pinconf_to_config_packed(pull, 0); |
| } |
| |
| (*map)[i].data.configs.configs = pinconfig; |
| (*map)[i].data.configs.num_configs = configlen; |
| |
| i++; |
| } |
| |
| *num_maps = nmaps; |
| |
| return 0; |
| } |
| |
| static void sunxi_pctrl_dt_free_map(struct pinctrl_dev *pctldev, |
| struct pinctrl_map *map, |
| unsigned num_maps) |
| { |
| int i; |
| |
| for (i = 0; i < num_maps; i++) { |
| if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP) |
| kfree(map[i].data.configs.configs); |
| } |
| |
| kfree(map); |
| } |
| |
| static const struct pinctrl_ops sunxi_pctrl_ops = { |
| .dt_node_to_map = sunxi_pctrl_dt_node_to_map, |
| .dt_free_map = sunxi_pctrl_dt_free_map, |
| .get_groups_count = sunxi_pctrl_get_groups_count, |
| .get_group_name = sunxi_pctrl_get_group_name, |
| .get_group_pins = sunxi_pctrl_get_group_pins, |
| }; |
| |
| static int sunxi_pconf_group_get(struct pinctrl_dev *pctldev, |
| unsigned group, |
| unsigned long *config) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| *config = pctl->groups[group].config; |
| |
| return 0; |
| } |
| |
| static int sunxi_pconf_group_set(struct pinctrl_dev *pctldev, |
| unsigned group, |
| unsigned long *configs, |
| unsigned num_configs) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| struct sunxi_pinctrl_group *g = &pctl->groups[group]; |
| unsigned long flags; |
| unsigned pin = g->pin - pctl->desc->pin_base; |
| u32 val, mask; |
| u16 strength; |
| u8 dlevel; |
| int i; |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| for (i = 0; i < num_configs; i++) { |
| switch (pinconf_to_config_param(configs[i])) { |
| case PIN_CONFIG_DRIVE_STRENGTH: |
| strength = pinconf_to_config_argument(configs[i]); |
| if (strength > 40) { |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| return -EINVAL; |
| } |
| /* |
| * We convert from mA to what the register expects: |
| * 0: 10mA |
| * 1: 20mA |
| * 2: 30mA |
| * 3: 40mA |
| */ |
| dlevel = strength / 10 - 1; |
| val = readl(pctl->membase + sunxi_dlevel_reg(pin)); |
| mask = DLEVEL_PINS_MASK << sunxi_dlevel_offset(pin); |
| writel((val & ~mask) |
| | dlevel << sunxi_dlevel_offset(pin), |
| pctl->membase + sunxi_dlevel_reg(pin)); |
| break; |
| case PIN_CONFIG_BIAS_PULL_UP: |
| val = readl(pctl->membase + sunxi_pull_reg(pin)); |
| mask = PULL_PINS_MASK << sunxi_pull_offset(pin); |
| writel((val & ~mask) | 1 << sunxi_pull_offset(pin), |
| pctl->membase + sunxi_pull_reg(pin)); |
| break; |
| case PIN_CONFIG_BIAS_PULL_DOWN: |
| val = readl(pctl->membase + sunxi_pull_reg(pin)); |
| mask = PULL_PINS_MASK << sunxi_pull_offset(pin); |
| writel((val & ~mask) | 2 << sunxi_pull_offset(pin), |
| pctl->membase + sunxi_pull_reg(pin)); |
| break; |
| default: |
| break; |
| } |
| /* cache the config value */ |
| g->config = configs[i]; |
| } /* for each config */ |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| |
| return 0; |
| } |
| |
| static const struct pinconf_ops sunxi_pconf_ops = { |
| .pin_config_group_get = sunxi_pconf_group_get, |
| .pin_config_group_set = sunxi_pconf_group_set, |
| }; |
| |
| static int sunxi_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| return pctl->nfunctions; |
| } |
| |
| static const char *sunxi_pmx_get_func_name(struct pinctrl_dev *pctldev, |
| unsigned function) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| return pctl->functions[function].name; |
| } |
| |
| static int sunxi_pmx_get_func_groups(struct pinctrl_dev *pctldev, |
| unsigned function, |
| const char * const **groups, |
| unsigned * const num_groups) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| |
| *groups = pctl->functions[function].groups; |
| *num_groups = pctl->functions[function].ngroups; |
| |
| return 0; |
| } |
| |
| static void sunxi_pmx_set(struct pinctrl_dev *pctldev, |
| unsigned pin, |
| u8 config) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| unsigned long flags; |
| u32 val, mask; |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| pin -= pctl->desc->pin_base; |
| val = readl(pctl->membase + sunxi_mux_reg(pin)); |
| mask = MUX_PINS_MASK << sunxi_mux_offset(pin); |
| writel((val & ~mask) | config << sunxi_mux_offset(pin), |
| pctl->membase + sunxi_mux_reg(pin)); |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| } |
| |
| static int sunxi_pmx_set_mux(struct pinctrl_dev *pctldev, |
| unsigned function, |
| unsigned group) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| struct sunxi_pinctrl_group *g = pctl->groups + group; |
| struct sunxi_pinctrl_function *func = pctl->functions + function; |
| struct sunxi_desc_function *desc = |
| sunxi_pinctrl_desc_find_function_by_name(pctl, |
| g->name, |
| func->name); |
| |
| if (!desc) |
| return -EINVAL; |
| |
| sunxi_pmx_set(pctldev, g->pin, desc->muxval); |
| |
| return 0; |
| } |
| |
| static int |
| sunxi_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, |
| struct pinctrl_gpio_range *range, |
| unsigned offset, |
| bool input) |
| { |
| struct sunxi_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev); |
| struct sunxi_desc_function *desc; |
| const char *func; |
| |
| if (input) |
| func = "gpio_in"; |
| else |
| func = "gpio_out"; |
| |
| desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, offset, func); |
| if (!desc) |
| return -EINVAL; |
| |
| sunxi_pmx_set(pctldev, offset, desc->muxval); |
| |
| return 0; |
| } |
| |
| static const struct pinmux_ops sunxi_pmx_ops = { |
| .get_functions_count = sunxi_pmx_get_funcs_cnt, |
| .get_function_name = sunxi_pmx_get_func_name, |
| .get_function_groups = sunxi_pmx_get_func_groups, |
| .set_mux = sunxi_pmx_set_mux, |
| .gpio_set_direction = sunxi_pmx_gpio_set_direction, |
| }; |
| |
| static int sunxi_pinctrl_gpio_request(struct gpio_chip *chip, unsigned offset) |
| { |
| return pinctrl_request_gpio(chip->base + offset); |
| } |
| |
| static void sunxi_pinctrl_gpio_free(struct gpio_chip *chip, unsigned offset) |
| { |
| pinctrl_free_gpio(chip->base + offset); |
| } |
| |
| static int sunxi_pinctrl_gpio_direction_input(struct gpio_chip *chip, |
| unsigned offset) |
| { |
| return pinctrl_gpio_direction_input(chip->base + offset); |
| } |
| |
| static int sunxi_pinctrl_gpio_get(struct gpio_chip *chip, unsigned offset) |
| { |
| struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); |
| u32 reg = sunxi_data_reg(offset); |
| u8 index = sunxi_data_offset(offset); |
| u32 set_mux = pctl->desc->irq_read_needs_mux && |
| test_bit(FLAG_USED_AS_IRQ, &chip->desc[offset].flags); |
| u32 val; |
| |
| if (set_mux) |
| sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_INPUT); |
| |
| val = (readl(pctl->membase + reg) >> index) & DATA_PINS_MASK; |
| |
| if (set_mux) |
| sunxi_pmx_set(pctl->pctl_dev, offset, SUN4I_FUNC_IRQ); |
| |
| return val; |
| } |
| |
| static void sunxi_pinctrl_gpio_set(struct gpio_chip *chip, |
| unsigned offset, int value) |
| { |
| struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); |
| u32 reg = sunxi_data_reg(offset); |
| u8 index = sunxi_data_offset(offset); |
| unsigned long flags; |
| u32 regval; |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| regval = readl(pctl->membase + reg); |
| |
| if (value) |
| regval |= BIT(index); |
| else |
| regval &= ~(BIT(index)); |
| |
| writel(regval, pctl->membase + reg); |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| } |
| |
| static int sunxi_pinctrl_gpio_direction_output(struct gpio_chip *chip, |
| unsigned offset, int value) |
| { |
| sunxi_pinctrl_gpio_set(chip, offset, value); |
| return pinctrl_gpio_direction_output(chip->base + offset); |
| } |
| |
| static int sunxi_pinctrl_gpio_of_xlate(struct gpio_chip *gc, |
| const struct of_phandle_args *gpiospec, |
| u32 *flags) |
| { |
| int pin, base; |
| |
| base = PINS_PER_BANK * gpiospec->args[0]; |
| pin = base + gpiospec->args[1]; |
| |
| if (pin > gc->ngpio) |
| return -EINVAL; |
| |
| if (flags) |
| *flags = gpiospec->args[2]; |
| |
| return pin; |
| } |
| |
| static int sunxi_pinctrl_gpio_to_irq(struct gpio_chip *chip, unsigned offset) |
| { |
| struct sunxi_pinctrl *pctl = dev_get_drvdata(chip->dev); |
| struct sunxi_desc_function *desc; |
| unsigned pinnum = pctl->desc->pin_base + offset; |
| unsigned irqnum; |
| |
| if (offset >= chip->ngpio) |
| return -ENXIO; |
| |
| desc = sunxi_pinctrl_desc_find_function_by_pin(pctl, pinnum, "irq"); |
| if (!desc) |
| return -EINVAL; |
| |
| irqnum = desc->irqbank * IRQ_PER_BANK + desc->irqnum; |
| |
| dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n", |
| chip->label, offset + chip->base, irqnum); |
| |
| return irq_find_mapping(pctl->domain, irqnum); |
| } |
| |
| static int sunxi_pinctrl_irq_request_resources(struct irq_data *d) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| struct sunxi_desc_function *func; |
| int ret; |
| |
| func = sunxi_pinctrl_desc_find_function_by_pin(pctl, |
| pctl->irq_array[d->hwirq], "irq"); |
| if (!func) |
| return -EINVAL; |
| |
| ret = gpiochip_lock_as_irq(pctl->chip, |
| pctl->irq_array[d->hwirq] - pctl->desc->pin_base); |
| if (ret) { |
| dev_err(pctl->dev, "unable to lock HW IRQ %lu for IRQ\n", |
| irqd_to_hwirq(d)); |
| return ret; |
| } |
| |
| /* Change muxing to INT mode */ |
| sunxi_pmx_set(pctl->pctl_dev, pctl->irq_array[d->hwirq], func->muxval); |
| |
| return 0; |
| } |
| |
| static void sunxi_pinctrl_irq_release_resources(struct irq_data *d) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| |
| gpiochip_unlock_as_irq(pctl->chip, |
| pctl->irq_array[d->hwirq] - pctl->desc->pin_base); |
| } |
| |
| static int sunxi_pinctrl_irq_set_type(struct irq_data *d, unsigned int type) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| u32 reg = sunxi_irq_cfg_reg(d->hwirq); |
| u8 index = sunxi_irq_cfg_offset(d->hwirq); |
| unsigned long flags; |
| u32 regval; |
| u8 mode; |
| |
| switch (type) { |
| case IRQ_TYPE_EDGE_RISING: |
| mode = IRQ_EDGE_RISING; |
| break; |
| case IRQ_TYPE_EDGE_FALLING: |
| mode = IRQ_EDGE_FALLING; |
| break; |
| case IRQ_TYPE_EDGE_BOTH: |
| mode = IRQ_EDGE_BOTH; |
| break; |
| case IRQ_TYPE_LEVEL_HIGH: |
| mode = IRQ_LEVEL_HIGH; |
| break; |
| case IRQ_TYPE_LEVEL_LOW: |
| mode = IRQ_LEVEL_LOW; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| if (type & IRQ_TYPE_LEVEL_MASK) |
| irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_level_irq_chip, |
| handle_fasteoi_irq, NULL); |
| else |
| irq_set_chip_handler_name_locked(d, &sunxi_pinctrl_edge_irq_chip, |
| handle_edge_irq, NULL); |
| |
| regval = readl(pctl->membase + reg); |
| regval &= ~(IRQ_CFG_IRQ_MASK << index); |
| writel(regval | (mode << index), pctl->membase + reg); |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| |
| return 0; |
| } |
| |
| static void sunxi_pinctrl_irq_ack(struct irq_data *d) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| u32 status_reg = sunxi_irq_status_reg(d->hwirq); |
| u8 status_idx = sunxi_irq_status_offset(d->hwirq); |
| |
| /* Clear the IRQ */ |
| writel(1 << status_idx, pctl->membase + status_reg); |
| } |
| |
| static void sunxi_pinctrl_irq_mask(struct irq_data *d) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| u32 reg = sunxi_irq_ctrl_reg(d->hwirq); |
| u8 idx = sunxi_irq_ctrl_offset(d->hwirq); |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| /* Mask the IRQ */ |
| val = readl(pctl->membase + reg); |
| writel(val & ~(1 << idx), pctl->membase + reg); |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| } |
| |
| static void sunxi_pinctrl_irq_unmask(struct irq_data *d) |
| { |
| struct sunxi_pinctrl *pctl = irq_data_get_irq_chip_data(d); |
| u32 reg = sunxi_irq_ctrl_reg(d->hwirq); |
| u8 idx = sunxi_irq_ctrl_offset(d->hwirq); |
| unsigned long flags; |
| u32 val; |
| |
| spin_lock_irqsave(&pctl->lock, flags); |
| |
| /* Unmask the IRQ */ |
| val = readl(pctl->membase + reg); |
| writel(val | (1 << idx), pctl->membase + reg); |
| |
| spin_unlock_irqrestore(&pctl->lock, flags); |
| } |
| |
| static void sunxi_pinctrl_irq_ack_unmask(struct irq_data *d) |
| { |
| sunxi_pinctrl_irq_ack(d); |
| sunxi_pinctrl_irq_unmask(d); |
| } |
| |
| static struct irq_chip sunxi_pinctrl_edge_irq_chip = { |
| .name = "sunxi_pio_edge", |
| .irq_ack = sunxi_pinctrl_irq_ack, |
| .irq_mask = sunxi_pinctrl_irq_mask, |
| .irq_unmask = sunxi_pinctrl_irq_unmask, |
| .irq_request_resources = sunxi_pinctrl_irq_request_resources, |
| .irq_release_resources = sunxi_pinctrl_irq_release_resources, |
| .irq_set_type = sunxi_pinctrl_irq_set_type, |
| .flags = IRQCHIP_SKIP_SET_WAKE, |
| }; |
| |
| static struct irq_chip sunxi_pinctrl_level_irq_chip = { |
| .name = "sunxi_pio_level", |
| .irq_eoi = sunxi_pinctrl_irq_ack, |
| .irq_mask = sunxi_pinctrl_irq_mask, |
| .irq_unmask = sunxi_pinctrl_irq_unmask, |
| /* Define irq_enable / disable to avoid spurious irqs for drivers |
| * using these to suppress irqs while they clear the irq source */ |
| .irq_enable = sunxi_pinctrl_irq_ack_unmask, |
| .irq_disable = sunxi_pinctrl_irq_mask, |
| .irq_request_resources = sunxi_pinctrl_irq_request_resources, |
| .irq_release_resources = sunxi_pinctrl_irq_release_resources, |
| .irq_set_type = sunxi_pinctrl_irq_set_type, |
| .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_EOI_THREADED | |
| IRQCHIP_EOI_IF_HANDLED, |
| }; |
| |
| static int sunxi_pinctrl_irq_of_xlate(struct irq_domain *d, |
| struct device_node *node, |
| const u32 *intspec, |
| unsigned int intsize, |
| unsigned long *out_hwirq, |
| unsigned int *out_type) |
| { |
| struct sunxi_desc_function *desc; |
| int pin, base; |
| |
| if (intsize < 3) |
| return -EINVAL; |
| |
| base = PINS_PER_BANK * intspec[0]; |
| pin = base + intspec[1]; |
| |
| desc = sunxi_pinctrl_desc_find_function_by_pin(d->host_data, |
| pin, "irq"); |
| if (!desc) |
| return -EINVAL; |
| |
| *out_hwirq = desc->irqbank * PINS_PER_BANK + desc->irqnum; |
| *out_type = intspec[2]; |
| |
| return 0; |
| } |
| |
| static struct irq_domain_ops sunxi_pinctrl_irq_domain_ops = { |
| .xlate = sunxi_pinctrl_irq_of_xlate, |
| }; |
| |
| static void sunxi_pinctrl_irq_handler(struct irq_desc *desc) |
| { |
| unsigned int irq = irq_desc_get_irq(desc); |
| struct irq_chip *chip = irq_desc_get_chip(desc); |
| struct sunxi_pinctrl *pctl = irq_desc_get_handler_data(desc); |
| unsigned long bank, reg, val; |
| |
| for (bank = 0; bank < pctl->desc->irq_banks; bank++) |
| if (irq == pctl->irq[bank]) |
| break; |
| |
| if (bank == pctl->desc->irq_banks) |
| return; |
| |
| reg = sunxi_irq_status_reg_from_bank(bank); |
| val = readl(pctl->membase + reg); |
| |
| if (val) { |
| int irqoffset; |
| |
| chained_irq_enter(chip, desc); |
| for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) { |
| int pin_irq = irq_find_mapping(pctl->domain, |
| bank * IRQ_PER_BANK + irqoffset); |
| generic_handle_irq(pin_irq); |
| } |
| chained_irq_exit(chip, desc); |
| } |
| } |
| |
| static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl, |
| const char *name) |
| { |
| struct sunxi_pinctrl_function *func = pctl->functions; |
| |
| while (func->name) { |
| /* function already there */ |
| if (strcmp(func->name, name) == 0) { |
| func->ngroups++; |
| return -EEXIST; |
| } |
| func++; |
| } |
| |
| func->name = name; |
| func->ngroups = 1; |
| |
| pctl->nfunctions++; |
| |
| return 0; |
| } |
| |
| static int sunxi_pinctrl_build_state(struct platform_device *pdev) |
| { |
| struct sunxi_pinctrl *pctl = platform_get_drvdata(pdev); |
| int i; |
| |
| pctl->ngroups = pctl->desc->npins; |
| |
| /* Allocate groups */ |
| pctl->groups = devm_kzalloc(&pdev->dev, |
| pctl->ngroups * sizeof(*pctl->groups), |
| GFP_KERNEL); |
| if (!pctl->groups) |
| return -ENOMEM; |
| |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| struct sunxi_pinctrl_group *group = pctl->groups + i; |
| |
| group->name = pin->pin.name; |
| group->pin = pin->pin.number; |
| } |
| |
| /* |
| * We suppose that we won't have any more functions than pins, |
| * we'll reallocate that later anyway |
| */ |
| pctl->functions = devm_kzalloc(&pdev->dev, |
| pctl->desc->npins * sizeof(*pctl->functions), |
| GFP_KERNEL); |
| if (!pctl->functions) |
| return -ENOMEM; |
| |
| /* Count functions and their associated groups */ |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| struct sunxi_desc_function *func = pin->functions; |
| |
| while (func->name) { |
| /* Create interrupt mapping while we're at it */ |
| if (!strcmp(func->name, "irq")) { |
| int irqnum = func->irqnum + func->irqbank * IRQ_PER_BANK; |
| pctl->irq_array[irqnum] = pin->pin.number; |
| } |
| |
| sunxi_pinctrl_add_function(pctl, func->name); |
| func++; |
| } |
| } |
| |
| pctl->functions = krealloc(pctl->functions, |
| pctl->nfunctions * sizeof(*pctl->functions), |
| GFP_KERNEL); |
| |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| struct sunxi_desc_function *func = pin->functions; |
| |
| while (func->name) { |
| struct sunxi_pinctrl_function *func_item; |
| const char **func_grp; |
| |
| func_item = sunxi_pinctrl_find_function_by_name(pctl, |
| func->name); |
| if (!func_item) |
| return -EINVAL; |
| |
| if (!func_item->groups) { |
| func_item->groups = |
| devm_kzalloc(&pdev->dev, |
| func_item->ngroups * sizeof(*func_item->groups), |
| GFP_KERNEL); |
| if (!func_item->groups) |
| return -ENOMEM; |
| } |
| |
| func_grp = func_item->groups; |
| while (*func_grp) |
| func_grp++; |
| |
| *func_grp = pin->pin.name; |
| func++; |
| } |
| } |
| |
| return 0; |
| } |
| |
| int sunxi_pinctrl_init(struct platform_device *pdev, |
| const struct sunxi_pinctrl_desc *desc) |
| { |
| struct device_node *node = pdev->dev.of_node; |
| struct pinctrl_desc *pctrl_desc; |
| struct pinctrl_pin_desc *pins; |
| struct sunxi_pinctrl *pctl; |
| struct resource *res; |
| int i, ret, last_pin; |
| struct clk *clk; |
| |
| pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL); |
| if (!pctl) |
| return -ENOMEM; |
| platform_set_drvdata(pdev, pctl); |
| |
| spin_lock_init(&pctl->lock); |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| pctl->membase = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(pctl->membase)) |
| return PTR_ERR(pctl->membase); |
| |
| pctl->dev = &pdev->dev; |
| pctl->desc = desc; |
| |
| pctl->irq_array = devm_kcalloc(&pdev->dev, |
| IRQ_PER_BANK * pctl->desc->irq_banks, |
| sizeof(*pctl->irq_array), |
| GFP_KERNEL); |
| if (!pctl->irq_array) |
| return -ENOMEM; |
| |
| ret = sunxi_pinctrl_build_state(pdev); |
| if (ret) { |
| dev_err(&pdev->dev, "dt probe failed: %d\n", ret); |
| return ret; |
| } |
| |
| pins = devm_kzalloc(&pdev->dev, |
| pctl->desc->npins * sizeof(*pins), |
| GFP_KERNEL); |
| if (!pins) |
| return -ENOMEM; |
| |
| for (i = 0; i < pctl->desc->npins; i++) |
| pins[i] = pctl->desc->pins[i].pin; |
| |
| pctrl_desc = devm_kzalloc(&pdev->dev, |
| sizeof(*pctrl_desc), |
| GFP_KERNEL); |
| if (!pctrl_desc) |
| return -ENOMEM; |
| |
| pctrl_desc->name = dev_name(&pdev->dev); |
| pctrl_desc->owner = THIS_MODULE; |
| pctrl_desc->pins = pins; |
| pctrl_desc->npins = pctl->desc->npins; |
| pctrl_desc->confops = &sunxi_pconf_ops; |
| pctrl_desc->pctlops = &sunxi_pctrl_ops; |
| pctrl_desc->pmxops = &sunxi_pmx_ops; |
| |
| pctl->pctl_dev = pinctrl_register(pctrl_desc, |
| &pdev->dev, pctl); |
| if (IS_ERR(pctl->pctl_dev)) { |
| dev_err(&pdev->dev, "couldn't register pinctrl driver\n"); |
| return PTR_ERR(pctl->pctl_dev); |
| } |
| |
| pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL); |
| if (!pctl->chip) { |
| ret = -ENOMEM; |
| goto pinctrl_error; |
| } |
| |
| last_pin = pctl->desc->pins[pctl->desc->npins - 1].pin.number; |
| pctl->chip->owner = THIS_MODULE; |
| pctl->chip->request = sunxi_pinctrl_gpio_request, |
| pctl->chip->free = sunxi_pinctrl_gpio_free, |
| pctl->chip->direction_input = sunxi_pinctrl_gpio_direction_input, |
| pctl->chip->direction_output = sunxi_pinctrl_gpio_direction_output, |
| pctl->chip->get = sunxi_pinctrl_gpio_get, |
| pctl->chip->set = sunxi_pinctrl_gpio_set, |
| pctl->chip->of_xlate = sunxi_pinctrl_gpio_of_xlate, |
| pctl->chip->to_irq = sunxi_pinctrl_gpio_to_irq, |
| pctl->chip->of_gpio_n_cells = 3, |
| pctl->chip->can_sleep = false, |
| pctl->chip->ngpio = round_up(last_pin, PINS_PER_BANK) - |
| pctl->desc->pin_base; |
| pctl->chip->label = dev_name(&pdev->dev); |
| pctl->chip->dev = &pdev->dev; |
| pctl->chip->base = pctl->desc->pin_base; |
| |
| ret = gpiochip_add(pctl->chip); |
| if (ret) |
| goto pinctrl_error; |
| |
| for (i = 0; i < pctl->desc->npins; i++) { |
| const struct sunxi_desc_pin *pin = pctl->desc->pins + i; |
| |
| ret = gpiochip_add_pin_range(pctl->chip, dev_name(&pdev->dev), |
| pin->pin.number - pctl->desc->pin_base, |
| pin->pin.number, 1); |
| if (ret) |
| goto gpiochip_error; |
| } |
| |
| clk = devm_clk_get(&pdev->dev, NULL); |
| if (IS_ERR(clk)) { |
| ret = PTR_ERR(clk); |
| goto gpiochip_error; |
| } |
| |
| ret = clk_prepare_enable(clk); |
| if (ret) |
| goto gpiochip_error; |
| |
| pctl->irq = devm_kcalloc(&pdev->dev, |
| pctl->desc->irq_banks, |
| sizeof(*pctl->irq), |
| GFP_KERNEL); |
| if (!pctl->irq) { |
| ret = -ENOMEM; |
| goto clk_error; |
| } |
| |
| for (i = 0; i < pctl->desc->irq_banks; i++) { |
| pctl->irq[i] = platform_get_irq(pdev, i); |
| if (pctl->irq[i] < 0) { |
| ret = pctl->irq[i]; |
| goto clk_error; |
| } |
| } |
| |
| pctl->domain = irq_domain_add_linear(node, |
| pctl->desc->irq_banks * IRQ_PER_BANK, |
| &sunxi_pinctrl_irq_domain_ops, |
| pctl); |
| if (!pctl->domain) { |
| dev_err(&pdev->dev, "Couldn't register IRQ domain\n"); |
| ret = -ENOMEM; |
| goto clk_error; |
| } |
| |
| for (i = 0; i < (pctl->desc->irq_banks * IRQ_PER_BANK); i++) { |
| int irqno = irq_create_mapping(pctl->domain, i); |
| |
| irq_set_chip_and_handler(irqno, &sunxi_pinctrl_edge_irq_chip, |
| handle_edge_irq); |
| irq_set_chip_data(irqno, pctl); |
| }; |
| |
| for (i = 0; i < pctl->desc->irq_banks; i++) { |
| /* Mask and clear all IRQs before registering a handler */ |
| writel(0, pctl->membase + sunxi_irq_ctrl_reg_from_bank(i)); |
| writel(0xffffffff, |
| pctl->membase + sunxi_irq_status_reg_from_bank(i)); |
| |
| irq_set_chained_handler_and_data(pctl->irq[i], |
| sunxi_pinctrl_irq_handler, |
| pctl); |
| } |
| |
| dev_info(&pdev->dev, "initialized sunXi PIO driver\n"); |
| |
| return 0; |
| |
| clk_error: |
| clk_disable_unprepare(clk); |
| gpiochip_error: |
| gpiochip_remove(pctl->chip); |
| pinctrl_error: |
| pinctrl_unregister(pctl->pctl_dev); |
| return ret; |
| } |