diff options
Diffstat (limited to 'drivers/pinctrl/sh-pfc/pinctrl.c')
| -rw-r--r-- | drivers/pinctrl/sh-pfc/pinctrl.c | 679 |
1 files changed, 0 insertions, 679 deletions
diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c deleted file mode 100644 index bc8b028bb5d2..000000000000 --- a/drivers/pinctrl/sh-pfc/pinctrl.c +++ /dev/null @@ -1,679 +0,0 @@ -/* - * SuperH Pin Function Controller pinmux support. - * - * Copyright (C) 2012 Paul Mundt - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#define DRV_NAME "sh-pfc" - -#include <linux/device.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/of.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/slab.h> -#include <linux/spinlock.h> - -#include "core.h" -#include "../core.h" -#include "../pinconf.h" - -struct sh_pfc_pin_config { - u32 type; -}; - -struct sh_pfc_pinctrl { - struct pinctrl_dev *pctl; - struct pinctrl_desc pctl_desc; - - struct sh_pfc *pfc; - - struct pinctrl_pin_desc *pins; - struct sh_pfc_pin_config *configs; -}; - -static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->pfc->info->nr_groups; -} - -static const char *sh_pfc_get_group_name(struct pinctrl_dev *pctldev, - unsigned selector) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->pfc->info->groups[selector].name; -} - -static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector, - const unsigned **pins, unsigned *num_pins) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - *pins = pmx->pfc->info->groups[selector].pins; - *num_pins = pmx->pfc->info->groups[selector].nr_pins; - - return 0; -} - -static void sh_pfc_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, - unsigned offset) -{ - seq_printf(s, "%s", DRV_NAME); -} - -#ifdef CONFIG_OF -static int sh_pfc_map_add_config(struct pinctrl_map *map, - const char *group_or_pin, - enum pinctrl_map_type type, - unsigned long *configs, - unsigned int num_configs) -{ - unsigned long *cfgs; - - cfgs = kmemdup(configs, num_configs * sizeof(*cfgs), - GFP_KERNEL); - if (cfgs == NULL) - return -ENOMEM; - - map->type = type; - map->data.configs.group_or_pin = group_or_pin; - map->data.configs.configs = cfgs; - map->data.configs.num_configs = num_configs; - - return 0; -} - -static int sh_pfc_dt_subnode_to_map(struct device *dev, struct device_node *np, - struct pinctrl_map **map, - unsigned int *num_maps, unsigned int *index) -{ - struct pinctrl_map *maps = *map; - unsigned int nmaps = *num_maps; - unsigned int idx = *index; - unsigned int num_configs; - const char *function = NULL; - unsigned long *configs; - struct property *prop; - unsigned int num_groups; - unsigned int num_pins; - const char *group; - const char *pin; - int ret; - - /* Parse the function and configuration properties. At least a function - * or one configuration must be specified. - */ - ret = of_property_read_string(np, "renesas,function", &function); - if (ret < 0 && ret != -EINVAL) { - dev_err(dev, "Invalid function in DT\n"); - return ret; - } - - ret = pinconf_generic_parse_dt_config(np, &configs, &num_configs); - if (ret < 0) - return ret; - - if (!function && num_configs == 0) { - dev_err(dev, - "DT node must contain at least a function or config\n"); - goto done; - } - - /* Count the number of pins and groups and reallocate mappings. */ - ret = of_property_count_strings(np, "renesas,pins"); - if (ret == -EINVAL) { - num_pins = 0; - } else if (ret < 0) { - dev_err(dev, "Invalid pins list in DT\n"); - goto done; - } else { - num_pins = ret; - } - - ret = of_property_count_strings(np, "renesas,groups"); - if (ret == -EINVAL) { - num_groups = 0; - } else if (ret < 0) { - dev_err(dev, "Invalid pin groups list in DT\n"); - goto done; - } else { - num_groups = ret; - } - - if (!num_pins && !num_groups) { - dev_err(dev, "No pin or group provided in DT node\n"); - ret = -ENODEV; - goto done; - } - - if (function) - nmaps += num_groups; - if (configs) - nmaps += num_pins + num_groups; - - maps = krealloc(maps, sizeof(*maps) * nmaps, GFP_KERNEL); - if (maps == NULL) { - ret = -ENOMEM; - goto done; - } - - *map = maps; - *num_maps = nmaps; - - /* Iterate over pins and groups and create the mappings. */ - of_property_for_each_string(np, "renesas,groups", prop, group) { - if (function) { - maps[idx].type = PIN_MAP_TYPE_MUX_GROUP; - maps[idx].data.mux.group = group; - maps[idx].data.mux.function = function; - idx++; - } - - if (configs) { - ret = sh_pfc_map_add_config(&maps[idx], group, - PIN_MAP_TYPE_CONFIGS_GROUP, - configs, num_configs); - if (ret < 0) - goto done; - - idx++; - } - } - - if (!configs) { - ret = 0; - goto done; - } - - of_property_for_each_string(np, "renesas,pins", prop, pin) { - ret = sh_pfc_map_add_config(&maps[idx], pin, - PIN_MAP_TYPE_CONFIGS_PIN, - configs, num_configs); - if (ret < 0) - goto done; - - idx++; - } - -done: - *index = idx; - kfree(configs); - return ret; -} - -static void sh_pfc_dt_free_map(struct pinctrl_dev *pctldev, - struct pinctrl_map *map, unsigned num_maps) -{ - unsigned int i; - - if (map == NULL) - return; - - for (i = 0; i < num_maps; ++i) { - if (map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP || - map[i].type == PIN_MAP_TYPE_CONFIGS_PIN) - kfree(map[i].data.configs.configs); - } - - kfree(map); -} - -static int sh_pfc_dt_node_to_map(struct pinctrl_dev *pctldev, - struct device_node *np, - struct pinctrl_map **map, unsigned *num_maps) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct device *dev = pmx->pfc->dev; - struct device_node *child; - unsigned int index; - int ret; - - *map = NULL; - *num_maps = 0; - index = 0; - - for_each_child_of_node(np, child) { - ret = sh_pfc_dt_subnode_to_map(dev, child, map, num_maps, - &index); - if (ret < 0) - goto done; - } - - /* If no mapping has been found in child nodes try the config node. */ - if (*num_maps == 0) { - ret = sh_pfc_dt_subnode_to_map(dev, np, map, num_maps, &index); - if (ret < 0) - goto done; - } - - if (*num_maps) - return 0; - - dev_err(dev, "no mapping found in node %s\n", np->full_name); - ret = -EINVAL; - -done: - if (ret < 0) - sh_pfc_dt_free_map(pctldev, *map, *num_maps); - - return ret; -} -#endif /* CONFIG_OF */ - -static const struct pinctrl_ops sh_pfc_pinctrl_ops = { - .get_groups_count = sh_pfc_get_groups_count, - .get_group_name = sh_pfc_get_group_name, - .get_group_pins = sh_pfc_get_group_pins, - .pin_dbg_show = sh_pfc_pin_dbg_show, -#ifdef CONFIG_OF - .dt_node_to_map = sh_pfc_dt_node_to_map, - .dt_free_map = sh_pfc_dt_free_map, -#endif -}; - -static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->pfc->info->nr_functions; -} - -static const char *sh_pfc_get_function_name(struct pinctrl_dev *pctldev, - unsigned selector) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->pfc->info->functions[selector].name; -} - -static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, - unsigned selector, - const char * const **groups, - unsigned * const num_groups) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - *groups = pmx->pfc->info->functions[selector].groups; - *num_groups = pmx->pfc->info->functions[selector].nr_groups; - - return 0; -} - -static int sh_pfc_func_enable(struct pinctrl_dev *pctldev, unsigned selector, - unsigned group) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - const struct sh_pfc_pin_group *grp = &pfc->info->groups[group]; - unsigned long flags; - unsigned int i; - int ret = 0; - - spin_lock_irqsave(&pfc->lock, flags); - - for (i = 0; i < grp->nr_pins; ++i) { - int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]); - struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; - - if (cfg->type != PINMUX_TYPE_NONE) { - ret = -EBUSY; - goto done; - } - } - - for (i = 0; i < grp->nr_pins; ++i) { - ret = sh_pfc_config_mux(pfc, grp->mux[i], PINMUX_TYPE_FUNCTION); - if (ret < 0) - break; - } - -done: - spin_unlock_irqrestore(&pfc->lock, flags); - return ret; -} - -static void sh_pfc_func_disable(struct pinctrl_dev *pctldev, unsigned selector, - unsigned group) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - const struct sh_pfc_pin_group *grp = &pfc->info->groups[group]; - unsigned long flags; - unsigned int i; - - spin_lock_irqsave(&pfc->lock, flags); - - for (i = 0; i < grp->nr_pins; ++i) { - int idx = sh_pfc_get_pin_index(pfc, grp->pins[i]); - struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; - - cfg->type = PINMUX_TYPE_NONE; - } - - spin_unlock_irqrestore(&pfc->lock, flags); -} - -static int sh_pfc_gpio_request_enable(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, - unsigned offset) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - int idx = sh_pfc_get_pin_index(pfc, offset); - struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; - unsigned long flags; - int ret; - - spin_lock_irqsave(&pfc->lock, flags); - - if (cfg->type != PINMUX_TYPE_NONE) { - dev_err(pfc->dev, - "Pin %u is busy, can't configure it as GPIO.\n", - offset); - ret = -EBUSY; - goto done; - } - - if (!pfc->gpio) { - /* If GPIOs are handled externally the pin mux type need to be - * set to GPIO here. - */ - const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; - - ret = sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO); - if (ret < 0) - goto done; - } - - cfg->type = PINMUX_TYPE_GPIO; - - ret = 0; - -done: - spin_unlock_irqrestore(&pfc->lock, flags); - - return ret; -} - -static void sh_pfc_gpio_disable_free(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, - unsigned offset) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - int idx = sh_pfc_get_pin_index(pfc, offset); - struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; - unsigned long flags; - - spin_lock_irqsave(&pfc->lock, flags); - cfg->type = PINMUX_TYPE_NONE; - spin_unlock_irqrestore(&pfc->lock, flags); -} - -static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, - unsigned offset, bool input) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - int new_type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; - int idx = sh_pfc_get_pin_index(pfc, offset); - const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; - struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; - unsigned long flags; - unsigned int dir; - int ret; - - /* Check if the requested direction is supported by the pin. Not all SoC - * provide pin config data, so perform the check conditionally. - */ - if (pin->configs) { - dir = input ? SH_PFC_PIN_CFG_INPUT : SH_PFC_PIN_CFG_OUTPUT; - if (!(pin->configs & dir)) - return -EINVAL; - } - - spin_lock_irqsave(&pfc->lock, flags); - - ret = sh_pfc_config_mux(pfc, pin->enum_id, new_type); - if (ret < 0) - goto done; - - cfg->type = new_type; - -done: - spin_unlock_irqrestore(&pfc->lock, flags); - return ret; -} - -static const struct pinmux_ops sh_pfc_pinmux_ops = { - .get_functions_count = sh_pfc_get_functions_count, - .get_function_name = sh_pfc_get_function_name, - .get_function_groups = sh_pfc_get_function_groups, - .enable = sh_pfc_func_enable, - .disable = sh_pfc_func_disable, - .gpio_request_enable = sh_pfc_gpio_request_enable, - .gpio_disable_free = sh_pfc_gpio_disable_free, - .gpio_set_direction = sh_pfc_gpio_set_direction, -}; - -/* Check whether the requested parameter is supported for a pin. */ -static bool sh_pfc_pinconf_validate(struct sh_pfc *pfc, unsigned int _pin, - enum pin_config_param param) -{ - int idx = sh_pfc_get_pin_index(pfc, _pin); - const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; - - switch (param) { - case PIN_CONFIG_BIAS_DISABLE: - return true; - - case PIN_CONFIG_BIAS_PULL_UP: - return pin->configs & SH_PFC_PIN_CFG_PULL_UP; - - case PIN_CONFIG_BIAS_PULL_DOWN: - return pin->configs & SH_PFC_PIN_CFG_PULL_DOWN; - - default: - return false; - } -} - -static int sh_pfc_pinconf_get(struct pinctrl_dev *pctldev, unsigned _pin, - unsigned long *config) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - enum pin_config_param param = pinconf_to_config_param(*config); - unsigned long flags; - unsigned int bias; - - if (!sh_pfc_pinconf_validate(pfc, _pin, param)) - return -ENOTSUPP; - - switch (param) { - case PIN_CONFIG_BIAS_DISABLE: - case PIN_CONFIG_BIAS_PULL_UP: - case PIN_CONFIG_BIAS_PULL_DOWN: - if (!pfc->info->ops || !pfc->info->ops->get_bias) - return -ENOTSUPP; - - spin_lock_irqsave(&pfc->lock, flags); - bias = pfc->info->ops->get_bias(pfc, _pin); - spin_unlock_irqrestore(&pfc->lock, flags); - - if (bias != param) - return -EINVAL; - - *config = 0; - break; - - default: - return -ENOTSUPP; - } - - return 0; -} - -static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned _pin, - unsigned long config) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - struct sh_pfc *pfc = pmx->pfc; - enum pin_config_param param = pinconf_to_config_param(config); - unsigned long flags; - - if (!sh_pfc_pinconf_validate(pfc, _pin, param)) - return -ENOTSUPP; - - switch (param) { - case PIN_CONFIG_BIAS_PULL_UP: - case PIN_CONFIG_BIAS_PULL_DOWN: - case PIN_CONFIG_BIAS_DISABLE: - if (!pfc->info->ops || !pfc->info->ops->set_bias) - return -ENOTSUPP; - - spin_lock_irqsave(&pfc->lock, flags); - pfc->info->ops->set_bias(pfc, _pin, param); - spin_unlock_irqrestore(&pfc->lock, flags); - - break; - - default: - return -ENOTSUPP; - } - - return 0; -} - -static int sh_pfc_pinconf_group_set(struct pinctrl_dev *pctldev, unsigned group, - unsigned long config) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - const unsigned int *pins; - unsigned int num_pins; - unsigned int i; - - pins = pmx->pfc->info->groups[group].pins; - num_pins = pmx->pfc->info->groups[group].nr_pins; - - for (i = 0; i < num_pins; ++i) - sh_pfc_pinconf_set(pctldev, pins[i], config); - - return 0; -} - -static const struct pinconf_ops sh_pfc_pinconf_ops = { - .is_generic = true, - .pin_config_get = sh_pfc_pinconf_get, - .pin_config_set = sh_pfc_pinconf_set, - .pin_config_group_set = sh_pfc_pinconf_group_set, - .pin_config_config_dbg_show = pinconf_generic_dump_config, -}; - -/* PFC ranges -> pinctrl pin descs */ -static int sh_pfc_map_pins(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) -{ - const struct pinmux_range *ranges; - struct pinmux_range def_range; - unsigned int nr_ranges; - unsigned int nr_pins; - unsigned int i; - - if (pfc->info->ranges == NULL) { - def_range.begin = 0; - def_range.end = pfc->info->nr_pins - 1; - ranges = &def_range; - nr_ranges = 1; - } else { - ranges = pfc->info->ranges; - nr_ranges = pfc->info->nr_ranges; - } - - pmx->pins = devm_kzalloc(pfc->dev, - sizeof(*pmx->pins) * pfc->info->nr_pins, - GFP_KERNEL); - if (unlikely(!pmx->pins)) - return -ENOMEM; - - pmx->configs = devm_kzalloc(pfc->dev, - sizeof(*pmx->configs) * pfc->info->nr_pins, - GFP_KERNEL); - if (unlikely(!pmx->configs)) - return -ENOMEM; - - for (i = 0, nr_pins = 0; i < nr_ranges; ++i) { - const struct pinmux_range *range = &ranges[i]; - unsigned int number; - - for (number = range->begin; number <= range->end; - number++, nr_pins++) { - struct sh_pfc_pin_config *cfg = &pmx->configs[nr_pins]; - struct pinctrl_pin_desc *pin = &pmx->pins[nr_pins]; - const struct sh_pfc_pin *info = - &pfc->info->pins[nr_pins]; - - pin->number = number; - pin->name = info->name; - cfg->type = PINMUX_TYPE_NONE; - } - } - - pfc->nr_pins = ranges[nr_ranges-1].end + 1; - - return nr_ranges; -} - -int sh_pfc_register_pinctrl(struct sh_pfc *pfc) -{ - struct sh_pfc_pinctrl *pmx; - int nr_ranges; - - pmx = devm_kzalloc(pfc->dev, sizeof(*pmx), GFP_KERNEL); - if (unlikely(!pmx)) - return -ENOMEM; - - pmx->pfc = pfc; - pfc->pinctrl = pmx; - - nr_ranges = sh_pfc_map_pins(pfc, pmx); - if (unlikely(nr_ranges < 0)) - return nr_ranges; - - pmx->pctl_desc.name = DRV_NAME; - pmx->pctl_desc.owner = THIS_MODULE; - pmx->pctl_desc.pctlops = &sh_pfc_pinctrl_ops; - pmx->pctl_desc.pmxops = &sh_pfc_pinmux_ops; - pmx->pctl_desc.confops = &sh_pfc_pinconf_ops; - pmx->pctl_desc.pins = pmx->pins; - pmx->pctl_desc.npins = pfc->info->nr_pins; - - pmx->pctl = pinctrl_register(&pmx->pctl_desc, pfc->dev, pmx); - if (pmx->pctl == NULL) - return -EINVAL; - - return 0; -} - -int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc) -{ - struct sh_pfc_pinctrl *pmx = pfc->pinctrl; - - pinctrl_unregister(pmx->pctl); - - pfc->pinctrl = NULL; - return 0; -} |