diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-samsung.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-samsung.c | 1168 |
1 files changed, 0 insertions, 1168 deletions
diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c deleted file mode 100644 index a7fa9e2d4751..000000000000 --- a/drivers/pinctrl/pinctrl-samsung.c +++ /dev/null @@ -1,1168 +0,0 @@ -/* - * pin-controller/pin-mux/pin-config/gpio-driver for Samsung's SoC's. - * - * Copyright (c) 2012 Samsung Electronics Co., Ltd. - * http://www.samsung.com - * Copyright (c) 2012 Linaro Ltd - * http://www.linaro.org - * - * Author: Thomas Abraham <thomas.ab@samsung.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This driver implements the Samsung pinctrl driver. It supports setting up of - * pinmux and pinconf configurations. The gpiolib interface is also included. - * External interrupt (gpio and wakeup) support are not included in this driver - * but provides extensions to which platform specific implementation of the gpio - * and wakeup interrupts can be hooked to. - */ - -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/gpio.h> -#include <linux/irqdomain.h> -#include <linux/spinlock.h> -#include <linux/syscore_ops.h> - -#include "core.h" -#include "pinctrl-samsung.h" - -#define GROUP_SUFFIX "-grp" -#define GSUFFIX_LEN sizeof(GROUP_SUFFIX) -#define FUNCTION_SUFFIX "-mux" -#define FSUFFIX_LEN sizeof(FUNCTION_SUFFIX) - -/* list of all possible config options supported */ -static struct pin_config { - char *prop_cfg; - unsigned int cfg_type; -} pcfgs[] = { - { "samsung,pin-pud", PINCFG_TYPE_PUD }, - { "samsung,pin-drv", PINCFG_TYPE_DRV }, - { "samsung,pin-con-pdn", PINCFG_TYPE_CON_PDN }, - { "samsung,pin-pud-pdn", PINCFG_TYPE_PUD_PDN }, -}; - -/* Global list of devices (struct samsung_pinctrl_drv_data) */ -static LIST_HEAD(drvdata_list); - -static unsigned int pin_base; - -static inline struct samsung_pin_bank *gc_to_pin_bank(struct gpio_chip *gc) -{ - return container_of(gc, struct samsung_pin_bank, gpio_chip); -} - -/* check if the selector is a valid pin group selector */ -static int samsung_get_group_count(struct pinctrl_dev *pctldev) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - return drvdata->nr_groups; -} - -/* return the name of the group selected by the group selector */ -static const char *samsung_get_group_name(struct pinctrl_dev *pctldev, - unsigned selector) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - return drvdata->pin_groups[selector].name; -} - -/* return the pin numbers associated with the specified group */ -static int samsung_get_group_pins(struct pinctrl_dev *pctldev, - unsigned selector, const unsigned **pins, unsigned *num_pins) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - *pins = drvdata->pin_groups[selector].pins; - *num_pins = drvdata->pin_groups[selector].num_pins; - return 0; -} - -/* create pinctrl_map entries by parsing device tree nodes */ -static int samsung_dt_node_to_map(struct pinctrl_dev *pctldev, - struct device_node *np, struct pinctrl_map **maps, - unsigned *nmaps) -{ - struct device *dev = pctldev->dev; - struct pinctrl_map *map; - unsigned long *cfg = NULL; - char *gname, *fname; - int cfg_cnt = 0, map_cnt = 0, idx = 0; - - /* count the number of config options specfied in the node */ - for (idx = 0; idx < ARRAY_SIZE(pcfgs); idx++) { - if (of_find_property(np, pcfgs[idx].prop_cfg, NULL)) - cfg_cnt++; - } - - /* - * Find out the number of map entries to create. All the config options - * can be accomadated into a single config map entry. - */ - if (cfg_cnt) - map_cnt = 1; - if (of_find_property(np, "samsung,pin-function", NULL)) - map_cnt++; - if (!map_cnt) { - dev_err(dev, "node %s does not have either config or function " - "configurations\n", np->name); - return -EINVAL; - } - - /* Allocate memory for pin-map entries */ - map = kzalloc(sizeof(*map) * map_cnt, GFP_KERNEL); - if (!map) { - dev_err(dev, "could not alloc memory for pin-maps\n"); - return -ENOMEM; - } - *nmaps = 0; - - /* - * Allocate memory for pin group name. The pin group name is derived - * from the node name from which these map entries are be created. - */ - gname = kzalloc(strlen(np->name) + GSUFFIX_LEN, GFP_KERNEL); - if (!gname) { - dev_err(dev, "failed to alloc memory for group name\n"); - goto free_map; - } - sprintf(gname, "%s%s", np->name, GROUP_SUFFIX); - - /* - * don't have config options? then skip over to creating function - * map entries. - */ - if (!cfg_cnt) - goto skip_cfgs; - - /* Allocate memory for config entries */ - cfg = kzalloc(sizeof(*cfg) * cfg_cnt, GFP_KERNEL); - if (!cfg) { - dev_err(dev, "failed to alloc memory for configs\n"); - goto free_gname; - } - - /* Prepare a list of config settings */ - for (idx = 0, cfg_cnt = 0; idx < ARRAY_SIZE(pcfgs); idx++) { - u32 value; - if (!of_property_read_u32(np, pcfgs[idx].prop_cfg, &value)) - cfg[cfg_cnt++] = - PINCFG_PACK(pcfgs[idx].cfg_type, value); - } - - /* create the config map entry */ - map[*nmaps].data.configs.group_or_pin = gname; - map[*nmaps].data.configs.configs = cfg; - map[*nmaps].data.configs.num_configs = cfg_cnt; - map[*nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP; - *nmaps += 1; - -skip_cfgs: - /* create the function map entry */ - if (of_find_property(np, "samsung,pin-function", NULL)) { - fname = kzalloc(strlen(np->name) + FSUFFIX_LEN, GFP_KERNEL); - if (!fname) { - dev_err(dev, "failed to alloc memory for func name\n"); - goto free_cfg; - } - sprintf(fname, "%s%s", np->name, FUNCTION_SUFFIX); - - map[*nmaps].data.mux.group = gname; - map[*nmaps].data.mux.function = fname; - map[*nmaps].type = PIN_MAP_TYPE_MUX_GROUP; - *nmaps += 1; - } - - *maps = map; - return 0; - -free_cfg: - kfree(cfg); -free_gname: - kfree(gname); -free_map: - kfree(map); - return -ENOMEM; -} - -/* free the memory allocated to hold the pin-map table */ -static void samsung_dt_free_map(struct pinctrl_dev *pctldev, - struct pinctrl_map *map, unsigned num_maps) -{ - int idx; - - for (idx = 0; idx < num_maps; idx++) { - if (map[idx].type == PIN_MAP_TYPE_MUX_GROUP) { - kfree(map[idx].data.mux.function); - if (!idx) - kfree(map[idx].data.mux.group); - } else if (map->type == PIN_MAP_TYPE_CONFIGS_GROUP) { - kfree(map[idx].data.configs.configs); - if (!idx) - kfree(map[idx].data.configs.group_or_pin); - } - }; - - kfree(map); -} - -/* list of pinctrl callbacks for the pinctrl core */ -static const struct pinctrl_ops samsung_pctrl_ops = { - .get_groups_count = samsung_get_group_count, - .get_group_name = samsung_get_group_name, - .get_group_pins = samsung_get_group_pins, - .dt_node_to_map = samsung_dt_node_to_map, - .dt_free_map = samsung_dt_free_map, -}; - -/* check if the selector is a valid pin function selector */ -static int samsung_get_functions_count(struct pinctrl_dev *pctldev) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - return drvdata->nr_functions; -} - -/* return the name of the pin function specified */ -static const char *samsung_pinmux_get_fname(struct pinctrl_dev *pctldev, - unsigned selector) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - return drvdata->pmx_functions[selector].name; -} - -/* return the groups associated for the specified function selector */ -static int samsung_pinmux_get_groups(struct pinctrl_dev *pctldev, - unsigned selector, const char * const **groups, - unsigned * const num_groups) -{ - struct samsung_pinctrl_drv_data *drvdata; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - *groups = drvdata->pmx_functions[selector].groups; - *num_groups = drvdata->pmx_functions[selector].num_groups; - return 0; -} - -/* - * given a pin number that is local to a pin controller, find out the pin bank - * and the register base of the pin bank. - */ -static void pin_to_reg_bank(struct samsung_pinctrl_drv_data *drvdata, - unsigned pin, void __iomem **reg, u32 *offset, - struct samsung_pin_bank **bank) -{ - struct samsung_pin_bank *b; - - b = drvdata->ctrl->pin_banks; - - while ((pin >= b->pin_base) && - ((b->pin_base + b->nr_pins - 1) < pin)) - b++; - - *reg = drvdata->virt_base + b->pctl_offset; - *offset = pin - b->pin_base; - if (bank) - *bank = b; -} - -/* enable or disable a pinmux function */ -static void samsung_pinmux_setup(struct pinctrl_dev *pctldev, unsigned selector, - unsigned group, bool enable) -{ - struct samsung_pinctrl_drv_data *drvdata; - const unsigned int *pins; - struct samsung_pin_bank *bank; - void __iomem *reg; - u32 mask, shift, data, pin_offset, cnt; - unsigned long flags; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - pins = drvdata->pin_groups[group].pins; - - /* - * for each pin in the pin group selected, program the correspoding pin - * pin function number in the config register. - */ - for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++) { - struct samsung_pin_bank_type *type; - - pin_to_reg_bank(drvdata, pins[cnt] - drvdata->ctrl->base, - ®, &pin_offset, &bank); - type = bank->type; - mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1; - shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC]; - if (shift >= 32) { - /* Some banks have two config registers */ - shift -= 32; - reg += 4; - } - - spin_lock_irqsave(&bank->slock, flags); - - data = readl(reg + type->reg_offset[PINCFG_TYPE_FUNC]); - data &= ~(mask << shift); - if (enable) - data |= drvdata->pin_groups[group].func << shift; - writel(data, reg + type->reg_offset[PINCFG_TYPE_FUNC]); - - spin_unlock_irqrestore(&bank->slock, flags); - } -} - -/* enable a specified pinmux by writing to registers */ -static int samsung_pinmux_enable(struct pinctrl_dev *pctldev, unsigned selector, - unsigned group) -{ - samsung_pinmux_setup(pctldev, selector, group, true); - return 0; -} - -/* disable a specified pinmux by writing to registers */ -static void samsung_pinmux_disable(struct pinctrl_dev *pctldev, - unsigned selector, unsigned group) -{ - samsung_pinmux_setup(pctldev, selector, group, false); -} - -/* - * The calls to gpio_direction_output() and gpio_direction_input() - * leads to this function call (via the pinctrl_gpio_direction_{input|output}() - * function called from the gpiolib interface). - */ -static int samsung_pinmux_gpio_set_direction(struct pinctrl_dev *pctldev, - struct pinctrl_gpio_range *range, unsigned offset, bool input) -{ - struct samsung_pin_bank_type *type; - struct samsung_pin_bank *bank; - struct samsung_pinctrl_drv_data *drvdata; - void __iomem *reg; - u32 data, pin_offset, mask, shift; - unsigned long flags; - - bank = gc_to_pin_bank(range->gc); - type = bank->type; - drvdata = pinctrl_dev_get_drvdata(pctldev); - - pin_offset = offset - bank->pin_base; - reg = drvdata->virt_base + bank->pctl_offset + - type->reg_offset[PINCFG_TYPE_FUNC]; - - mask = (1 << type->fld_width[PINCFG_TYPE_FUNC]) - 1; - shift = pin_offset * type->fld_width[PINCFG_TYPE_FUNC]; - if (shift >= 32) { - /* Some banks have two config registers */ - shift -= 32; - reg += 4; - } - - spin_lock_irqsave(&bank->slock, flags); - - data = readl(reg); - data &= ~(mask << shift); - if (!input) - data |= FUNC_OUTPUT << shift; - writel(data, reg); - - spin_unlock_irqrestore(&bank->slock, flags); - - return 0; -} - -/* list of pinmux callbacks for the pinmux vertical in pinctrl core */ -static const struct pinmux_ops samsung_pinmux_ops = { - .get_functions_count = samsung_get_functions_count, - .get_function_name = samsung_pinmux_get_fname, - .get_function_groups = samsung_pinmux_get_groups, - .enable = samsung_pinmux_enable, - .disable = samsung_pinmux_disable, - .gpio_set_direction = samsung_pinmux_gpio_set_direction, -}; - -/* set or get the pin config settings for a specified pin */ -static int samsung_pinconf_rw(struct pinctrl_dev *pctldev, unsigned int pin, - unsigned long *config, bool set) -{ - struct samsung_pinctrl_drv_data *drvdata; - struct samsung_pin_bank_type *type; - struct samsung_pin_bank *bank; - void __iomem *reg_base; - enum pincfg_type cfg_type = PINCFG_UNPACK_TYPE(*config); - u32 data, width, pin_offset, mask, shift; - u32 cfg_value, cfg_reg; - unsigned long flags; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - pin_to_reg_bank(drvdata, pin - drvdata->ctrl->base, ®_base, - &pin_offset, &bank); - type = bank->type; - - if (cfg_type >= PINCFG_TYPE_NUM || !type->fld_width[cfg_type]) - return -EINVAL; - - width = type->fld_width[cfg_type]; - cfg_reg = type->reg_offset[cfg_type]; - - spin_lock_irqsave(&bank->slock, flags); - - mask = (1 << width) - 1; - shift = pin_offset * width; - data = readl(reg_base + cfg_reg); - - if (set) { - cfg_value = PINCFG_UNPACK_VALUE(*config); - data &= ~(mask << shift); - data |= (cfg_value << shift); - writel(data, reg_base + cfg_reg); - } else { - data >>= shift; - data &= mask; - *config = PINCFG_PACK(cfg_type, data); - } - - spin_unlock_irqrestore(&bank->slock, flags); - - return 0; -} - -/* set the pin config settings for a specified pin */ -static int samsung_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, - unsigned long config) -{ - return samsung_pinconf_rw(pctldev, pin, &config, true); -} - -/* get the pin config settings for a specified pin */ -static int samsung_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin, - unsigned long *config) -{ - return samsung_pinconf_rw(pctldev, pin, config, false); -} - -/* set the pin config settings for a specified pin group */ -static int samsung_pinconf_group_set(struct pinctrl_dev *pctldev, - unsigned group, unsigned long config) -{ - struct samsung_pinctrl_drv_data *drvdata; - const unsigned int *pins; - unsigned int cnt; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - pins = drvdata->pin_groups[group].pins; - - for (cnt = 0; cnt < drvdata->pin_groups[group].num_pins; cnt++) - samsung_pinconf_set(pctldev, pins[cnt], config); - - return 0; -} - -/* get the pin config settings for a specified pin group */ -static int samsung_pinconf_group_get(struct pinctrl_dev *pctldev, - unsigned int group, unsigned long *config) -{ - struct samsung_pinctrl_drv_data *drvdata; - const unsigned int *pins; - - drvdata = pinctrl_dev_get_drvdata(pctldev); - pins = drvdata->pin_groups[group].pins; - samsung_pinconf_get(pctldev, pins[0], config); - return 0; -} - -/* list of pinconfig callbacks for pinconfig vertical in the pinctrl code */ -static const struct pinconf_ops samsung_pinconf_ops = { - .pin_config_get = samsung_pinconf_get, - .pin_config_set = samsung_pinconf_set, - .pin_config_group_get = samsung_pinconf_group_get, - .pin_config_group_set = samsung_pinconf_group_set, -}; - -/* gpiolib gpio_set callback function */ -static void samsung_gpio_set(struct gpio_chip *gc, unsigned offset, int value) -{ - struct samsung_pin_bank *bank = gc_to_pin_bank(gc); - struct samsung_pin_bank_type *type = bank->type; - unsigned long flags; - void __iomem *reg; - u32 data; - - reg = bank->drvdata->virt_base + bank->pctl_offset; - - spin_lock_irqsave(&bank->slock, flags); - - data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); - data &= ~(1 << offset); - if (value) - data |= 1 << offset; - writel(data, reg + type->reg_offset[PINCFG_TYPE_DAT]); - - spin_unlock_irqrestore(&bank->slock, flags); -} - -/* gpiolib gpio_get callback function */ -static int samsung_gpio_get(struct gpio_chip *gc, unsigned offset) -{ - void __iomem *reg; - u32 data; - struct samsung_pin_bank *bank = gc_to_pin_bank(gc); - struct samsung_pin_bank_type *type = bank->type; - - reg = bank->drvdata->virt_base + bank->pctl_offset; - - data = readl(reg + type->reg_offset[PINCFG_TYPE_DAT]); - data >>= offset; - data &= 1; - return data; -} - -/* - * gpiolib gpio_direction_input callback function. The setting of the pin - * mux function as 'gpio input' will be handled by the pinctrl susbsystem - * interface. - */ -static int samsung_gpio_direction_input(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_gpio_direction_input(gc->base + offset); -} - -/* - * gpiolib gpio_direction_output callback function. The setting of the pin - * mux function as 'gpio output' will be handled by the pinctrl susbsystem - * interface. - */ -static int samsung_gpio_direction_output(struct gpio_chip *gc, unsigned offset, - int value) -{ - samsung_gpio_set(gc, offset, value); - return pinctrl_gpio_direction_output(gc->base + offset); -} - -/* - * gpiolib gpio_to_irq callback function. Creates a mapping between a GPIO pin - * and a virtual IRQ, if not already present. - */ -static int samsung_gpio_to_irq(struct gpio_chip *gc, unsigned offset) -{ - struct samsung_pin_bank *bank = gc_to_pin_bank(gc); - unsigned int virq; - - if (!bank->irq_domain) - return -ENXIO; - - virq = irq_create_mapping(bank->irq_domain, offset); - - return (virq) ? : -ENXIO; -} - -/* - * Parse the pin names listed in the 'samsung,pins' property and convert it - * into a list of gpio numbers are create a pin group from it. - */ -static int samsung_pinctrl_parse_dt_pins(struct platform_device *pdev, - struct device_node *cfg_np, - struct pinctrl_desc *pctl, - unsigned int **pin_list, - unsigned int *npins) -{ - struct device *dev = &pdev->dev; - struct property *prop; - struct pinctrl_pin_desc const *pdesc = pctl->pins; - unsigned int idx = 0, cnt; - const char *pin_name; - - *npins = of_property_count_strings(cfg_np, "samsung,pins"); - if (IS_ERR_VALUE(*npins)) { - dev_err(dev, "invalid pin list in %s node", cfg_np->name); - return -EINVAL; - } - - *pin_list = devm_kzalloc(dev, *npins * sizeof(**pin_list), GFP_KERNEL); - if (!*pin_list) { - dev_err(dev, "failed to allocate memory for pin list\n"); - return -ENOMEM; - } - - of_property_for_each_string(cfg_np, "samsung,pins", prop, pin_name) { - for (cnt = 0; cnt < pctl->npins; cnt++) { - if (pdesc[cnt].name) { - if (!strcmp(pin_name, pdesc[cnt].name)) { - (*pin_list)[idx++] = pdesc[cnt].number; - break; - } - } - } - if (cnt == pctl->npins) { - dev_err(dev, "pin %s not valid in %s node\n", - pin_name, cfg_np->name); - devm_kfree(dev, *pin_list); - return -EINVAL; - } - } - - return 0; -} - -/* - * Parse the information about all the available pin groups and pin functions - * from device node of the pin-controller. A pin group is formed with all - * the pins listed in the "samsung,pins" property. - */ -static int samsung_pinctrl_parse_dt(struct platform_device *pdev, - struct samsung_pinctrl_drv_data *drvdata) -{ - struct device *dev = &pdev->dev; - struct device_node *dev_np = dev->of_node; - struct device_node *cfg_np; - struct samsung_pin_group *groups, *grp; - struct samsung_pmx_func *functions, *func; - unsigned *pin_list; - unsigned int npins, grp_cnt, func_idx = 0; - char *gname, *fname; - int ret; - - grp_cnt = of_get_child_count(dev_np); - if (!grp_cnt) - return -EINVAL; - - groups = devm_kzalloc(dev, grp_cnt * sizeof(*groups), GFP_KERNEL); - if (!groups) { - dev_err(dev, "failed allocate memory for ping group list\n"); - return -EINVAL; - } - grp = groups; - - functions = devm_kzalloc(dev, grp_cnt * sizeof(*functions), GFP_KERNEL); - if (!functions) { - dev_err(dev, "failed to allocate memory for function list\n"); - return -EINVAL; - } - func = functions; - - /* - * Iterate over all the child nodes of the pin controller node - * and create pin groups and pin function lists. - */ - for_each_child_of_node(dev_np, cfg_np) { - u32 function; - if (!of_find_property(cfg_np, "samsung,pins", NULL)) - continue; - - ret = samsung_pinctrl_parse_dt_pins(pdev, cfg_np, - &drvdata->pctl, &pin_list, &npins); - if (ret) - return ret; - - /* derive pin group name from the node name */ - gname = devm_kzalloc(dev, strlen(cfg_np->name) + GSUFFIX_LEN, - GFP_KERNEL); - if (!gname) { - dev_err(dev, "failed to alloc memory for group name\n"); - return -ENOMEM; - } - sprintf(gname, "%s%s", cfg_np->name, GROUP_SUFFIX); - - grp->name = gname; - grp->pins = pin_list; - grp->num_pins = npins; - of_property_read_u32(cfg_np, "samsung,pin-function", &function); - grp->func = function; - grp++; - - if (!of_find_property(cfg_np, "samsung,pin-function", NULL)) - continue; - - /* derive function name from the node name */ - fname = devm_kzalloc(dev, strlen(cfg_np->name) + FSUFFIX_LEN, - GFP_KERNEL); - if (!fname) { - dev_err(dev, "failed to alloc memory for func name\n"); - return -ENOMEM; - } - sprintf(fname, "%s%s", cfg_np->name, FUNCTION_SUFFIX); - - func->name = fname; - func->groups = devm_kzalloc(dev, sizeof(char *), GFP_KERNEL); - if (!func->groups) { - dev_err(dev, "failed to alloc memory for group list " - "in pin function"); - return -ENOMEM; - } - func->groups[0] = gname; - func->num_groups = 1; - func++; - func_idx++; - } - - drvdata->pin_groups = groups; - drvdata->nr_groups = grp_cnt; - drvdata->pmx_functions = functions; - drvdata->nr_functions = func_idx; - - return 0; -} - -/* register the pinctrl interface with the pinctrl subsystem */ -static int samsung_pinctrl_register(struct platform_device *pdev, - struct samsung_pinctrl_drv_data *drvdata) -{ - struct pinctrl_desc *ctrldesc = &drvdata->pctl; - struct pinctrl_pin_desc *pindesc, *pdesc; - struct samsung_pin_bank *pin_bank; - char *pin_names; - int pin, bank, ret; - - ctrldesc->name = "samsung-pinctrl"; - ctrldesc->owner = THIS_MODULE; - ctrldesc->pctlops = &samsung_pctrl_ops; - ctrldesc->pmxops = &samsung_pinmux_ops; - ctrldesc->confops = &samsung_pinconf_ops; - - pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) * - drvdata->ctrl->nr_pins, GFP_KERNEL); - if (!pindesc) { - dev_err(&pdev->dev, "mem alloc for pin descriptors failed\n"); - return -ENOMEM; - } - ctrldesc->pins = pindesc; - ctrldesc->npins = drvdata->ctrl->nr_pins; - - /* dynamically populate the pin number and pin name for pindesc */ - for (pin = 0, pdesc = pindesc; pin < ctrldesc->npins; pin++, pdesc++) - pdesc->number = pin + drvdata->ctrl->base; - - /* - * allocate space for storing the dynamically generated names for all - * the pins which belong to this pin-controller. - */ - pin_names = devm_kzalloc(&pdev->dev, sizeof(char) * PIN_NAME_LENGTH * - drvdata->ctrl->nr_pins, GFP_KERNEL); - if (!pin_names) { - dev_err(&pdev->dev, "mem alloc for pin names failed\n"); - return -ENOMEM; - } - - /* for each pin, the name of the pin is pin-bank name + pin number */ - for (bank = 0; bank < drvdata->ctrl->nr_banks; bank++) { - pin_bank = &drvdata->ctrl->pin_banks[bank]; - for (pin = 0; pin < pin_bank->nr_pins; pin++) { - sprintf(pin_names, "%s-%d", pin_bank->name, pin); - pdesc = pindesc + pin_bank->pin_base + pin; - pdesc->name = pin_names; - pin_names += PIN_NAME_LENGTH; - } - } - - drvdata->pctl_dev = pinctrl_register(ctrldesc, &pdev->dev, drvdata); - if (!drvdata->pctl_dev) { - dev_err(&pdev->dev, "could not register pinctrl driver\n"); - return -EINVAL; - } - - for (bank = 0; bank < drvdata->ctrl->nr_banks; ++bank) { - pin_bank = &drvdata->ctrl->pin_banks[bank]; - pin_bank->grange.name = pin_bank->name; - pin_bank->grange.id = bank; - pin_bank->grange.pin_base = pin_bank->pin_base; - pin_bank->grange.base = pin_bank->gpio_chip.base; - pin_bank->grange.npins = pin_bank->gpio_chip.ngpio; - pin_bank->grange.gc = &pin_bank->gpio_chip; - pinctrl_add_gpio_range(drvdata->pctl_dev, &pin_bank->grange); - } - - ret = samsung_pinctrl_parse_dt(pdev, drvdata); - if (ret) { - pinctrl_unregister(drvdata->pctl_dev); - return ret; - } - - return 0; -} - -static const struct gpio_chip samsung_gpiolib_chip = { - .set = samsung_gpio_set, - .get = samsung_gpio_get, - .direction_input = samsung_gpio_direction_input, - .direction_output = samsung_gpio_direction_output, - .to_irq = samsung_gpio_to_irq, - .owner = THIS_MODULE, -}; - -/* register the gpiolib interface with the gpiolib subsystem */ -static int samsung_gpiolib_register(struct platform_device *pdev, - struct samsung_pinctrl_drv_data *drvdata) -{ - struct samsung_pin_ctrl *ctrl = drvdata->ctrl; - struct samsung_pin_bank *bank = ctrl->pin_banks; - struct gpio_chip *gc; - int ret; - int i; - - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - bank->gpio_chip = samsung_gpiolib_chip; - - gc = &bank->gpio_chip; - gc->base = ctrl->base + bank->pin_base; - gc->ngpio = bank->nr_pins; - gc->dev = &pdev->dev; - gc->of_node = bank->of_node; - gc->label = bank->name; - - ret = gpiochip_add(gc); - if (ret) { - dev_err(&pdev->dev, "failed to register gpio_chip %s, error code: %d\n", - gc->label, ret); - goto fail; - } - } - - return 0; - -fail: - for (--i, --bank; i >= 0; --i, --bank) - if (gpiochip_remove(&bank->gpio_chip)) - dev_err(&pdev->dev, "gpio chip %s remove failed\n", - bank->gpio_chip.label); - return ret; -} - -/* unregister the gpiolib interface with the gpiolib subsystem */ -static int samsung_gpiolib_unregister(struct platform_device *pdev, - struct samsung_pinctrl_drv_data *drvdata) -{ - struct samsung_pin_ctrl *ctrl = drvdata->ctrl; - struct samsung_pin_bank *bank = ctrl->pin_banks; - int ret = 0; - int i; - - for (i = 0; !ret && i < ctrl->nr_banks; ++i, ++bank) - ret = gpiochip_remove(&bank->gpio_chip); - - if (ret) - dev_err(&pdev->dev, "gpio chip remove failed\n"); - - return ret; -} - -static const struct of_device_id samsung_pinctrl_dt_match[]; - -/* retrieve the soc specific data */ -static struct samsung_pin_ctrl *samsung_pinctrl_get_soc_data( - struct samsung_pinctrl_drv_data *d, - struct platform_device *pdev) -{ - int id; - const struct of_device_id *match; - struct device_node *node = pdev->dev.of_node; - struct device_node *np; - struct samsung_pin_ctrl *ctrl; - struct samsung_pin_bank *bank; - int i; - - id = of_alias_get_id(node, "pinctrl"); - if (id < 0) { - dev_err(&pdev->dev, "failed to get alias id\n"); - return NULL; - } - match = of_match_node(samsung_pinctrl_dt_match, node); - ctrl = (struct samsung_pin_ctrl *)match->data + id; - - bank = ctrl->pin_banks; - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - spin_lock_init(&bank->slock); - bank->drvdata = d; - bank->pin_base = ctrl->nr_pins; - ctrl->nr_pins += bank->nr_pins; - } - - for_each_child_of_node(node, np) { - if (!of_find_property(np, "gpio-controller", NULL)) - continue; - bank = ctrl->pin_banks; - for (i = 0; i < ctrl->nr_banks; ++i, ++bank) { - if (!strcmp(bank->name, np->name)) { - bank->of_node = np; - break; - } - } - } - - ctrl->base = pin_base; - pin_base += ctrl->nr_pins; - - return ctrl; -} - -static int samsung_pinctrl_probe(struct platform_device *pdev) -{ - struct samsung_pinctrl_drv_data *drvdata; - struct device *dev = &pdev->dev; - struct samsung_pin_ctrl *ctrl; - struct resource *res; - int ret; - - if (!dev->of_node) { - dev_err(dev, "device tree node not found\n"); - return -ENODEV; - } - - drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL); - if (!drvdata) { - dev_err(dev, "failed to allocate memory for driver's " - "private data\n"); - return -ENOMEM; - } - - ctrl = samsung_pinctrl_get_soc_data(drvdata, pdev); - if (!ctrl) { - dev_err(&pdev->dev, "driver data not available\n"); - return -EINVAL; - } - drvdata->ctrl = ctrl; - drvdata->dev = dev; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(drvdata->virt_base)) - return PTR_ERR(drvdata->virt_base); - - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (res) - drvdata->irq = res->start; - - ret = samsung_gpiolib_register(pdev, drvdata); - if (ret) - return ret; - - ret = samsung_pinctrl_register(pdev, drvdata); - if (ret) { - samsung_gpiolib_unregister(pdev, drvdata); - return ret; - } - - if (ctrl->eint_gpio_init) - ctrl->eint_gpio_init(drvdata); - if (ctrl->eint_wkup_init) - ctrl->eint_wkup_init(drvdata); - - platform_set_drvdata(pdev, drvdata); - - /* Add to the global list */ - list_add_tail(&drvdata->node, &drvdata_list); - - return 0; -} - -#ifdef CONFIG_PM - -/** - * samsung_pinctrl_suspend_dev - save pinctrl state for suspend for a device - * - * Save data for all banks handled by this device. - */ -static void samsung_pinctrl_suspend_dev( - struct samsung_pinctrl_drv_data *drvdata) -{ - struct samsung_pin_ctrl *ctrl = drvdata->ctrl; - void __iomem *virt_base = drvdata->virt_base; - int i; - - for (i = 0; i < ctrl->nr_banks; i++) { - struct samsung_pin_bank *bank = &ctrl->pin_banks[i]; - void __iomem *reg = virt_base + bank->pctl_offset; - - u8 *offs = bank->type->reg_offset; - u8 *widths = bank->type->fld_width; - enum pincfg_type type; - - /* Registers without a powerdown config aren't lost */ - if (!widths[PINCFG_TYPE_CON_PDN]) - continue; - - for (type = 0; type < PINCFG_TYPE_NUM; type++) - if (widths[type]) - bank->pm_save[type] = readl(reg + offs[type]); - - if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) { - /* Some banks have two config registers */ - bank->pm_save[PINCFG_TYPE_NUM] = - readl(reg + offs[PINCFG_TYPE_FUNC] + 4); - pr_debug("Save %s @ %p (con %#010x %08x)\n", - bank->name, reg, - bank->pm_save[PINCFG_TYPE_FUNC], - bank->pm_save[PINCFG_TYPE_NUM]); - } else { - pr_debug("Save %s @ %p (con %#010x)\n", bank->name, - reg, bank->pm_save[PINCFG_TYPE_FUNC]); - } - } - - if (ctrl->suspend) - ctrl->suspend(drvdata); -} - -/** - * samsung_pinctrl_resume_dev - restore pinctrl state from suspend for a device - * - * Restore one of the banks that was saved during suspend. - * - * We don't bother doing anything complicated to avoid glitching lines since - * we're called before pad retention is turned off. - */ -static void samsung_pinctrl_resume_dev(struct samsung_pinctrl_drv_data *drvdata) -{ - struct samsung_pin_ctrl *ctrl = drvdata->ctrl; - void __iomem *virt_base = drvdata->virt_base; - int i; - - if (ctrl->resume) - ctrl->resume(drvdata); - - for (i = 0; i < ctrl->nr_banks; i++) { - struct samsung_pin_bank *bank = &ctrl->pin_banks[i]; - void __iomem *reg = virt_base + bank->pctl_offset; - - u8 *offs = bank->type->reg_offset; - u8 *widths = bank->type->fld_width; - enum pincfg_type type; - - /* Registers without a powerdown config aren't lost */ - if (!widths[PINCFG_TYPE_CON_PDN]) - continue; - - if (widths[PINCFG_TYPE_FUNC] * bank->nr_pins > 32) { - /* Some banks have two config registers */ - pr_debug("%s @ %p (con %#010x %08x => %#010x %08x)\n", - bank->name, reg, - readl(reg + offs[PINCFG_TYPE_FUNC]), - readl(reg + offs[PINCFG_TYPE_FUNC] + 4), - bank->pm_save[PINCFG_TYPE_FUNC], - bank->pm_save[PINCFG_TYPE_NUM]); - writel(bank->pm_save[PINCFG_TYPE_NUM], - reg + offs[PINCFG_TYPE_FUNC] + 4); - } else { - pr_debug("%s @ %p (con %#010x => %#010x)\n", bank->name, - reg, readl(reg + offs[PINCFG_TYPE_FUNC]), - bank->pm_save[PINCFG_TYPE_FUNC]); - } - for (type = 0; type < PINCFG_TYPE_NUM; type++) - if (widths[type]) - writel(bank->pm_save[type], reg + offs[type]); - } -} - -/** - * samsung_pinctrl_suspend - save pinctrl state for suspend - * - * Save data for all banks across all devices. - */ -static int samsung_pinctrl_suspend(void) -{ - struct samsung_pinctrl_drv_data *drvdata; - - list_for_each_entry(drvdata, &drvdata_list, node) { - samsung_pinctrl_suspend_dev(drvdata); - } - - return 0; -} - -/** - * samsung_pinctrl_resume - restore pinctrl state for suspend - * - * Restore data for all banks across all devices. - */ -static void samsung_pinctrl_resume(void) -{ - struct samsung_pinctrl_drv_data *drvdata; - - list_for_each_entry_reverse(drvdata, &drvdata_list, node) { - samsung_pinctrl_resume_dev(drvdata); - } -} - -#else -#define samsung_pinctrl_suspend NULL -#define samsung_pinctrl_resume NULL -#endif - -static struct syscore_ops samsung_pinctrl_syscore_ops = { - .suspend = samsung_pinctrl_suspend, - .resume = samsung_pinctrl_resume, -}; - -static const struct of_device_id samsung_pinctrl_dt_match[] = { -#ifdef CONFIG_PINCTRL_EXYNOS - { .compatible = "samsung,exynos4210-pinctrl", - .data = (void *)exynos4210_pin_ctrl }, - { .compatible = "samsung,exynos4x12-pinctrl", - .data = (void *)exynos4x12_pin_ctrl }, - { .compatible = "samsung,exynos5250-pinctrl", - .data = (void *)exynos5250_pin_ctrl }, - { .compatible = "samsung,exynos5420-pinctrl", - .data = (void *)exynos5420_pin_ctrl }, -#endif -#ifdef CONFIG_PINCTRL_S3C64XX - { .compatible = "samsung,s3c64xx-pinctrl", - .data = s3c64xx_pin_ctrl }, -#endif -#ifdef CONFIG_PINCTRL_S3C24XX - { .compatible = "samsung,s3c2412-pinctrl", - .data = s3c2412_pin_ctrl }, - { .compatible = "samsung,s3c2416-pinctrl", - .data = s3c2416_pin_ctrl }, - { .compatible = "samsung,s3c2440-pinctrl", - .data = s3c2440_pin_ctrl }, - { .compatible = "samsung,s3c2450-pinctrl", - .data = s3c2450_pin_ctrl }, -#endif - {}, -}; -MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match); - -static struct platform_driver samsung_pinctrl_driver = { - .probe = samsung_pinctrl_probe, - .driver = { - .name = "samsung-pinctrl", - .owner = THIS_MODULE, - .of_match_table = of_match_ptr(samsung_pinctrl_dt_match), - }, -}; - -static int __init samsung_pinctrl_drv_register(void) -{ - /* - * Register syscore ops for save/restore of registers across suspend. - * It's important to ensure that this driver is running at an earlier - * initcall level than any arch-specific init calls that install syscore - * ops that turn off pad retention (like exynos_pm_resume). - */ - register_syscore_ops(&samsung_pinctrl_syscore_ops); - - return platform_driver_register(&samsung_pinctrl_driver); -} -postcore_initcall(samsung_pinctrl_drv_register); - -static void __exit samsung_pinctrl_drv_unregister(void) -{ - platform_driver_unregister(&samsung_pinctrl_driver); -} -module_exit(samsung_pinctrl_drv_unregister); - -MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>"); -MODULE_DESCRIPTION("Samsung pinctrl driver"); -MODULE_LICENSE("GPL v2"); |