diff options
Diffstat (limited to 'drivers/sh/pfc')
| -rw-r--r-- | drivers/sh/pfc/Kconfig | 26 | ||||
| -rw-r--r-- | drivers/sh/pfc/Makefile | 3 | ||||
| -rw-r--r-- | drivers/sh/pfc/core.c | 572 | ||||
| -rw-r--r-- | drivers/sh/pfc/gpio.c | 240 | ||||
| -rw-r--r-- | drivers/sh/pfc/pinctrl.c | 527 |
5 files changed, 0 insertions, 1368 deletions
diff --git a/drivers/sh/pfc/Kconfig b/drivers/sh/pfc/Kconfig deleted file mode 100644 index 804f9ad1bf4a..000000000000 --- a/drivers/sh/pfc/Kconfig +++ /dev/null @@ -1,26 +0,0 @@ -comment "Pin function controller options" - -config SH_PFC - # XXX move off the gpio dependency - depends on GENERIC_GPIO - select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB - select PINCTRL_SH_PFC - def_bool y - -# -# Placeholder for now, rehome to drivers/pinctrl once the PFC APIs -# have settled. -# -config PINCTRL_SH_PFC - tristate "SuperH PFC pin controller driver" - depends on SH_PFC - select PINCTRL - select PINMUX - select PINCONF - -config GPIO_SH_PFC - tristate "SuperH PFC GPIO support" - depends on SH_PFC && GPIOLIB - help - This enables support for GPIOs within the SoC's pin function - controller. diff --git a/drivers/sh/pfc/Makefile b/drivers/sh/pfc/Makefile deleted file mode 100644 index 7916027cce37..000000000000 --- a/drivers/sh/pfc/Makefile +++ /dev/null @@ -1,3 +0,0 @@ -obj-y += core.o -obj-$(CONFIG_PINCTRL_SH_PFC) += pinctrl.o -obj-$(CONFIG_GPIO_SH_PFC) += gpio.o diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c deleted file mode 100644 index 68169373c98b..000000000000 --- a/drivers/sh/pfc/core.c +++ /dev/null @@ -1,572 +0,0 @@ -/* - * SuperH Pin Function Controller support. - * - * Copyright (C) 2008 Magnus Damm - * Copyright (C) 2009 - 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 pr_fmt(fmt) "sh_pfc " KBUILD_MODNAME ": " fmt - -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/sh_pfc.h> -#include <linux/module.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/bitops.h> -#include <linux/slab.h> -#include <linux/ioport.h> -#include <linux/pinctrl/machine.h> - -static struct sh_pfc *sh_pfc __read_mostly; - -static inline bool sh_pfc_initialized(void) -{ - return !!sh_pfc; -} - -static void pfc_iounmap(struct sh_pfc *pfc) -{ - int k; - - for (k = 0; k < pfc->num_resources; k++) - if (pfc->window[k].virt) - iounmap(pfc->window[k].virt); - - kfree(pfc->window); - pfc->window = NULL; -} - -static int pfc_ioremap(struct sh_pfc *pfc) -{ - struct resource *res; - int k; - - if (!pfc->num_resources) - return 0; - - pfc->window = kzalloc(pfc->num_resources * sizeof(*pfc->window), - GFP_NOWAIT); - if (!pfc->window) - goto err1; - - for (k = 0; k < pfc->num_resources; k++) { - res = pfc->resource + k; - WARN_ON(resource_type(res) != IORESOURCE_MEM); - pfc->window[k].phys = res->start; - pfc->window[k].size = resource_size(res); - pfc->window[k].virt = ioremap_nocache(res->start, - resource_size(res)); - if (!pfc->window[k].virt) - goto err2; - } - - return 0; - -err2: - pfc_iounmap(pfc); -err1: - return -1; -} - -static void __iomem *pfc_phys_to_virt(struct sh_pfc *pfc, - unsigned long address) -{ - struct pfc_window *window; - int k; - - /* scan through physical windows and convert address */ - for (k = 0; k < pfc->num_resources; k++) { - window = pfc->window + k; - - if (address < window->phys) - continue; - - if (address >= (window->phys + window->size)) - continue; - - return window->virt + (address - window->phys); - } - - /* no windows defined, register must be 1:1 mapped virt:phys */ - return (void __iomem *)address; -} - -static int enum_in_range(pinmux_enum_t enum_id, struct pinmux_range *r) -{ - if (enum_id < r->begin) - return 0; - - if (enum_id > r->end) - return 0; - - return 1; -} - -static unsigned long gpio_read_raw_reg(void __iomem *mapped_reg, - unsigned long reg_width) -{ - switch (reg_width) { - case 8: - return ioread8(mapped_reg); - case 16: - return ioread16(mapped_reg); - case 32: - return ioread32(mapped_reg); - } - - BUG(); - return 0; -} - -static void gpio_write_raw_reg(void __iomem *mapped_reg, - unsigned long reg_width, - unsigned long data) -{ - switch (reg_width) { - case 8: - iowrite8(data, mapped_reg); - return; - case 16: - iowrite16(data, mapped_reg); - return; - case 32: - iowrite32(data, mapped_reg); - return; - } - - BUG(); -} - -int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos) -{ - unsigned long pos; - - pos = dr->reg_width - (in_pos + 1); - - pr_debug("read_bit: addr = %lx, pos = %ld, " - "r_width = %ld\n", dr->reg, pos, dr->reg_width); - - return (gpio_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1; -} -EXPORT_SYMBOL_GPL(sh_pfc_read_bit); - -void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos, - unsigned long value) -{ - unsigned long pos; - - pos = dr->reg_width - (in_pos + 1); - - pr_debug("write_bit addr = %lx, value = %d, pos = %ld, " - "r_width = %ld\n", - dr->reg, !!value, pos, dr->reg_width); - - if (value) - set_bit(pos, &dr->reg_shadow); - else - clear_bit(pos, &dr->reg_shadow); - - gpio_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow); -} -EXPORT_SYMBOL_GPL(sh_pfc_write_bit); - -static void config_reg_helper(struct sh_pfc *pfc, - struct pinmux_cfg_reg *crp, - unsigned long in_pos, - void __iomem **mapped_regp, - unsigned long *maskp, - unsigned long *posp) -{ - int k; - - *mapped_regp = pfc_phys_to_virt(pfc, crp->reg); - - if (crp->field_width) { - *maskp = (1 << crp->field_width) - 1; - *posp = crp->reg_width - ((in_pos + 1) * crp->field_width); - } else { - *maskp = (1 << crp->var_field_width[in_pos]) - 1; - *posp = crp->reg_width; - for (k = 0; k <= in_pos; k++) - *posp -= crp->var_field_width[k]; - } -} - -static int read_config_reg(struct sh_pfc *pfc, - struct pinmux_cfg_reg *crp, - unsigned long field) -{ - void __iomem *mapped_reg; - unsigned long mask, pos; - - config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos); - - pr_debug("read_reg: addr = %lx, field = %ld, " - "r_width = %ld, f_width = %ld\n", - crp->reg, field, crp->reg_width, crp->field_width); - - return (gpio_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask; -} - -static void write_config_reg(struct sh_pfc *pfc, - struct pinmux_cfg_reg *crp, - unsigned long field, unsigned long value) -{ - void __iomem *mapped_reg; - unsigned long mask, pos, data; - - config_reg_helper(pfc, crp, field, &mapped_reg, &mask, &pos); - - pr_debug("write_reg addr = %lx, value = %ld, field = %ld, " - "r_width = %ld, f_width = %ld\n", - crp->reg, value, field, crp->reg_width, crp->field_width); - - mask = ~(mask << pos); - value = value << pos; - - data = gpio_read_raw_reg(mapped_reg, crp->reg_width); - data &= mask; - data |= value; - - if (pfc->unlock_reg) - gpio_write_raw_reg(pfc_phys_to_virt(pfc, pfc->unlock_reg), - 32, ~data); - - gpio_write_raw_reg(mapped_reg, crp->reg_width, data); -} - -static int setup_data_reg(struct sh_pfc *pfc, unsigned gpio) -{ - struct pinmux_gpio *gpiop = &pfc->gpios[gpio]; - struct pinmux_data_reg *data_reg; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &pfc->data)) - return -1; - - k = 0; - while (1) { - data_reg = pfc->data_regs + k; - - if (!data_reg->reg_width) - break; - - data_reg->mapped_reg = pfc_phys_to_virt(pfc, data_reg->reg); - - for (n = 0; n < data_reg->reg_width; n++) { - if (data_reg->enum_ids[n] == gpiop->enum_id) { - gpiop->flags &= ~PINMUX_FLAG_DREG; - gpiop->flags |= (k << PINMUX_FLAG_DREG_SHIFT); - gpiop->flags &= ~PINMUX_FLAG_DBIT; - gpiop->flags |= (n << PINMUX_FLAG_DBIT_SHIFT); - return 0; - } - } - k++; - } - - BUG(); - - return -1; -} - -static void setup_data_regs(struct sh_pfc *pfc) -{ - struct pinmux_data_reg *drp; - int k; - - for (k = pfc->first_gpio; k <= pfc->last_gpio; k++) - setup_data_reg(pfc, k); - - k = 0; - while (1) { - drp = pfc->data_regs + k; - - if (!drp->reg_width) - break; - - drp->reg_shadow = gpio_read_raw_reg(drp->mapped_reg, - drp->reg_width); - k++; - } -} - -int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio, - struct pinmux_data_reg **drp, int *bitp) -{ - struct pinmux_gpio *gpiop = &pfc->gpios[gpio]; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &pfc->data)) - return -1; - - k = (gpiop->flags & PINMUX_FLAG_DREG) >> PINMUX_FLAG_DREG_SHIFT; - n = (gpiop->flags & PINMUX_FLAG_DBIT) >> PINMUX_FLAG_DBIT_SHIFT; - *drp = pfc->data_regs + k; - *bitp = n; - return 0; -} -EXPORT_SYMBOL_GPL(sh_pfc_get_data_reg); - -static int get_config_reg(struct sh_pfc *pfc, pinmux_enum_t enum_id, - struct pinmux_cfg_reg **crp, - int *fieldp, int *valuep, - unsigned long **cntp) -{ - struct pinmux_cfg_reg *config_reg; - unsigned long r_width, f_width, curr_width, ncomb; - int k, m, n, pos, bit_pos; - - k = 0; - while (1) { - config_reg = pfc->cfg_regs + k; - - r_width = config_reg->reg_width; - f_width = config_reg->field_width; - - if (!r_width) - break; - - pos = 0; - m = 0; - for (bit_pos = 0; bit_pos < r_width; bit_pos += curr_width) { - if (f_width) - curr_width = f_width; - else - curr_width = config_reg->var_field_width[m]; - - ncomb = 1 << curr_width; - for (n = 0; n < ncomb; n++) { - if (config_reg->enum_ids[pos + n] == enum_id) { - *crp = config_reg; - *fieldp = m; - *valuep = n; - *cntp = &config_reg->cnt[m]; - return 0; - } - } - pos += ncomb; - m++; - } - k++; - } - - return -1; -} - -int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos, - pinmux_enum_t *enum_idp) -{ - pinmux_enum_t enum_id = pfc->gpios[gpio].enum_id; - pinmux_enum_t *data = pfc->gpio_data; - int k; - - if (!enum_in_range(enum_id, &pfc->data)) { - if (!enum_in_range(enum_id, &pfc->mark)) { - pr_err("non data/mark enum_id for gpio %d\n", gpio); - return -1; - } - } - - if (pos) { - *enum_idp = data[pos + 1]; - return pos + 1; - } - - for (k = 0; k < pfc->gpio_data_size; k++) { - if (data[k] == enum_id) { - *enum_idp = data[k + 1]; - return k + 1; - } - } - - pr_err("cannot locate data/mark enum_id for gpio %d\n", gpio); - return -1; -} -EXPORT_SYMBOL_GPL(sh_pfc_gpio_to_enum); - -int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type, - int cfg_mode) -{ - struct pinmux_cfg_reg *cr = NULL; - pinmux_enum_t enum_id; - struct pinmux_range *range; - int in_range, pos, field, value; - unsigned long *cntp; - - switch (pinmux_type) { - - case PINMUX_TYPE_FUNCTION: - range = NULL; - break; - - case PINMUX_TYPE_OUTPUT: - range = &pfc->output; - break; - - case PINMUX_TYPE_INPUT: - range = &pfc->input; - break; - - case PINMUX_TYPE_INPUT_PULLUP: - range = &pfc->input_pu; - break; - - case PINMUX_TYPE_INPUT_PULLDOWN: - range = &pfc->input_pd; - break; - - default: - goto out_err; - } - - pos = 0; - enum_id = 0; - field = 0; - value = 0; - while (1) { - pos = sh_pfc_gpio_to_enum(pfc, gpio, pos, &enum_id); - if (pos <= 0) - goto out_err; - - if (!enum_id) - break; - - /* first check if this is a function enum */ - in_range = enum_in_range(enum_id, &pfc->function); - if (!in_range) { - /* not a function enum */ - if (range) { - /* - * other range exists, so this pin is - * a regular GPIO pin that now is being - * bound to a specific direction. - * - * for this case we only allow function enums - * and the enums that match the other range. - */ - in_range = enum_in_range(enum_id, range); - - /* - * special case pass through for fixed - * input-only or output-only pins without - * function enum register association. - */ - if (in_range && enum_id == range->force) - continue; - } else { - /* - * no other range exists, so this pin - * must then be of the function type. - * - * allow function type pins to select - * any combination of function/in/out - * in their MARK lists. - */ - in_range = 1; - } - } - - if (!in_range) - continue; - - if (get_config_reg(pfc, enum_id, &cr, - &field, &value, &cntp) != 0) - goto out_err; - - switch (cfg_mode) { - case GPIO_CFG_DRYRUN: - if (!*cntp || - (read_config_reg(pfc, cr, field) != value)) - continue; - break; - - case GPIO_CFG_REQ: - write_config_reg(pfc, cr, field, value); - *cntp = *cntp + 1; - break; - - case GPIO_CFG_FREE: - *cntp = *cntp - 1; - break; - } - } - - return 0; - out_err: - return -1; -} -EXPORT_SYMBOL_GPL(sh_pfc_config_gpio); - -int register_sh_pfc(struct sh_pfc *pfc) -{ - int (*initroutine)(struct sh_pfc *) = NULL; - int ret; - - /* - * Ensure that the type encoding fits - */ - BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1)); - - if (sh_pfc) - return -EBUSY; - - ret = pfc_ioremap(pfc); - if (unlikely(ret < 0)) - return ret; - - spin_lock_init(&pfc->lock); - - pinctrl_provide_dummies(); - setup_data_regs(pfc); - - sh_pfc = pfc; - - /* - * Initialize pinctrl bindings first - */ - initroutine = symbol_request(sh_pfc_register_pinctrl); - if (initroutine) { - ret = (*initroutine)(pfc); - symbol_put_addr(initroutine); - - if (unlikely(ret != 0)) - goto err; - } else { - pr_err("failed to initialize pinctrl bindings\n"); - goto err; - } - - /* - * Then the GPIO chip - */ - initroutine = symbol_request(sh_pfc_register_gpiochip); - if (initroutine) { - ret = (*initroutine)(pfc); - symbol_put_addr(initroutine); - - /* - * If the GPIO chip fails to come up we still leave the - * PFC state as it is, given that there are already - * extant users of it that have succeeded by this point. - */ - if (unlikely(ret != 0)) { - pr_notice("failed to init GPIO chip, ignoring...\n"); - ret = 0; - } - } - - pr_info("%s support registered\n", pfc->name); - - return 0; - -err: - pfc_iounmap(pfc); - sh_pfc = NULL; - - return ret; -} diff --git a/drivers/sh/pfc/gpio.c b/drivers/sh/pfc/gpio.c deleted file mode 100644 index 6a24f07c2013..000000000000 --- a/drivers/sh/pfc/gpio.c +++ /dev/null @@ -1,240 +0,0 @@ -/* - * SuperH Pin Function Controller GPIO driver. - * - * Copyright (C) 2008 Magnus Damm - * Copyright (C) 2009 - 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 pr_fmt(fmt) "sh_pfc " KBUILD_MODNAME ": " fmt - -#include <linux/init.h> -#include <linux/gpio.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/pinctrl/consumer.h> -#include <linux/sh_pfc.h> - -struct sh_pfc_chip { - struct sh_pfc *pfc; - struct gpio_chip gpio_chip; -}; - -static struct sh_pfc_chip *gpio_to_pfc_chip(struct gpio_chip *gc) -{ - return container_of(gc, struct sh_pfc_chip, gpio_chip); -} - -static struct sh_pfc *gpio_to_pfc(struct gpio_chip *gc) -{ - return gpio_to_pfc_chip(gc)->pfc; -} - -static int sh_gpio_request(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_request_gpio(offset); -} - -static void sh_gpio_free(struct gpio_chip *gc, unsigned offset) -{ - pinctrl_free_gpio(offset); -} - -static void sh_gpio_set_value(struct sh_pfc *pfc, unsigned gpio, int value) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) - BUG(); - else - sh_pfc_write_bit(dr, bit, value); -} - -static int sh_gpio_get_value(struct sh_pfc *pfc, unsigned gpio) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (!pfc || sh_pfc_get_data_reg(pfc, gpio, &dr, &bit) != 0) - return -EINVAL; - - return sh_pfc_read_bit(dr, bit); -} - -static int sh_gpio_direction_input(struct gpio_chip *gc, unsigned offset) -{ - return pinctrl_gpio_direction_input(offset); -} - -static int sh_gpio_direction_output(struct gpio_chip *gc, unsigned offset, - int value) -{ - sh_gpio_set_value(gpio_to_pfc(gc), offset, value); - - return pinctrl_gpio_direction_output(offset); -} - -static int sh_gpio_get(struct gpio_chip *gc, unsigned offset) -{ - return sh_gpio_get_value(gpio_to_pfc(gc), offset); -} - -static void sh_gpio_set(struct gpio_chip *gc, unsigned offset, int value) -{ - sh_gpio_set_value(gpio_to_pfc(gc), offset, value); -} - -static int sh_gpio_to_irq(struct gpio_chip *gc, unsigned offset) -{ - struct sh_pfc *pfc = gpio_to_pfc(gc); - pinmux_enum_t enum_id; - pinmux_enum_t *enum_ids; - int i, k, pos; - - pos = 0; - enum_id = 0; - while (1) { - pos = sh_pfc_gpio_to_enum(pfc, offset, pos, &enum_id); - if (pos <= 0 || !enum_id) - break; - - for (i = 0; i < pfc->gpio_irq_size; i++) { - enum_ids = pfc->gpio_irq[i].enum_ids; - for (k = 0; enum_ids[k]; k++) { - if (enum_ids[k] == enum_id) - return pfc->gpio_irq[i].irq; - } - } - } - - return -ENOSYS; -} - -static void sh_pfc_gpio_setup(struct sh_pfc_chip *chip) -{ - struct sh_pfc *pfc = chip->pfc; - struct gpio_chip *gc = &chip->gpio_chip; - - gc->request = sh_gpio_request; - gc->free = sh_gpio_free; - gc->direction_input = sh_gpio_direction_input; - gc->get = sh_gpio_get; - gc->direction_output = sh_gpio_direction_output; - gc->set = sh_gpio_set; - gc->to_irq = sh_gpio_to_irq; - - WARN_ON(pfc->first_gpio != 0); /* needs testing */ - - gc->label = pfc->name; - gc->owner = THIS_MODULE; - gc->base = pfc->first_gpio; - gc->ngpio = (pfc->last_gpio - pfc->first_gpio) + 1; -} - -int sh_pfc_register_gpiochip(struct sh_pfc *pfc) -{ - struct sh_pfc_chip *chip; - int ret; - - chip = kzalloc(sizeof(struct sh_pfc_chip), GFP_KERNEL); - if (unlikely(!chip)) - return -ENOMEM; - - chip->pfc = pfc; - - sh_pfc_gpio_setup(chip); - - ret = gpiochip_add(&chip->gpio_chip); - if (unlikely(ret < 0)) - kfree(chip); - - pr_info("%s handling gpio %d -> %d\n", - pfc->name, pfc->first_gpio, pfc->last_gpio); - - return ret; -} -EXPORT_SYMBOL_GPL(sh_pfc_register_gpiochip); - -static int sh_pfc_gpio_match(struct gpio_chip *gc, void *data) -{ - return !!strstr(gc->label, data); -} - -static int sh_pfc_gpio_probe(struct platform_device *pdev) -{ - struct sh_pfc_chip *chip; - struct gpio_chip *gc; - - gc = gpiochip_find("_pfc", sh_pfc_gpio_match); - if (unlikely(!gc)) { - pr_err("Cant find gpio chip\n"); - return -ENODEV; - } - - chip = gpio_to_pfc_chip(gc); - platform_set_drvdata(pdev, chip); - - pr_info("attaching to GPIO chip %s\n", chip->pfc->name); - - return 0; -} - -static int sh_pfc_gpio_remove(struct platform_device *pdev) -{ - struct sh_pfc_chip *chip = platform_get_drvdata(pdev); - int ret; - - ret = gpiochip_remove(&chip->gpio_chip); - if (unlikely(ret < 0)) - return ret; - - kfree(chip); - return 0; -} - -static struct platform_driver sh_pfc_gpio_driver = { - .probe = sh_pfc_gpio_probe, - .remove = sh_pfc_gpio_remove, - .driver = { - .name = KBUILD_MODNAME, - .owner = THIS_MODULE, - }, -}; - -static struct platform_device sh_pfc_gpio_device = { - .name = KBUILD_MODNAME, - .id = -1, -}; - -static int __init sh_pfc_gpio_init(void) -{ - int rc; - - rc = platform_driver_register(&sh_pfc_gpio_driver); - if (likely(!rc)) { - rc = platform_device_register(&sh_pfc_gpio_device); - if (unlikely(rc)) - platform_driver_unregister(&sh_pfc_gpio_driver); - } - - return rc; -} - -static void __exit sh_pfc_gpio_exit(void) -{ - platform_device_unregister(&sh_pfc_gpio_device); - platform_driver_unregister(&sh_pfc_gpio_driver); -} - -module_init(sh_pfc_gpio_init); -module_exit(sh_pfc_gpio_exit); - -MODULE_AUTHOR("Magnus Damm, Paul Mundt"); -MODULE_DESCRIPTION("GPIO driver for SuperH pin function controller"); -MODULE_LICENSE("GPL v2"); -MODULE_ALIAS("platform:pfc-gpio"); diff --git a/drivers/sh/pfc/pinctrl.c b/drivers/sh/pfc/pinctrl.c deleted file mode 100644 index 4109b769eac0..000000000000 --- a/drivers/sh/pfc/pinctrl.c +++ /dev/null @@ -1,527 +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 "pinctrl-sh_pfc" - -#define pr_fmt(fmt) DRV_NAME " " KBUILD_MODNAME ": " fmt - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/sh_pfc.h> -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/spinlock.h> -#include <linux/platform_device.h> -#include <linux/pinctrl/consumer.h> -#include <linux/pinctrl/pinctrl.h> -#include <linux/pinctrl/pinconf.h> -#include <linux/pinctrl/pinmux.h> -#include <linux/pinctrl/pinconf-generic.h> - -struct sh_pfc_pinctrl { - struct pinctrl_dev *pctl; - struct sh_pfc *pfc; - - struct pinmux_gpio **functions; - unsigned int nr_functions; - - struct pinctrl_pin_desc *pads; - unsigned int nr_pads; - - spinlock_t lock; -}; - -static struct sh_pfc_pinctrl *sh_pfc_pmx; - -static int sh_pfc_get_groups_count(struct pinctrl_dev *pctldev) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->nr_pads; -} - -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->pads[selector].name; -} - -static int sh_pfc_get_group_pins(struct pinctrl_dev *pctldev, unsigned group, - const unsigned **pins, unsigned *num_pins) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - *pins = &pmx->pads[group].number; - *num_pins = 1; - - 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); -} - -static 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, -}; - -static int sh_pfc_get_functions_count(struct pinctrl_dev *pctldev) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - return pmx->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->functions[selector]->name; -} - -static int sh_pfc_get_function_groups(struct pinctrl_dev *pctldev, unsigned func, - const char * const **groups, - unsigned * const num_groups) -{ - struct sh_pfc_pinctrl *pmx = pinctrl_dev_get_drvdata(pctldev); - - *groups = &pmx->functions[func]->name; - *num_groups = 1; - - return 0; -} - -static int sh_pfc_noop_enable(struct pinctrl_dev *pctldev, unsigned func, - unsigned group) -{ - return 0; -} - -static void sh_pfc_noop_disable(struct pinctrl_dev *pctldev, unsigned func, - unsigned group) -{ -} - -static inline int sh_pfc_config_function(struct sh_pfc *pfc, unsigned offset) -{ - if (sh_pfc_config_gpio(pfc, offset, - PINMUX_TYPE_FUNCTION, - GPIO_CFG_DRYRUN) != 0) - return -EINVAL; - - if (sh_pfc_config_gpio(pfc, offset, - PINMUX_TYPE_FUNCTION, - GPIO_CFG_REQ) != 0) - return -EINVAL; - - return 0; -} - -static int sh_pfc_reconfig_pin(struct sh_pfc *pfc, unsigned offset, - int new_type) -{ - unsigned long flags; - int pinmux_type; - int ret = -EINVAL; - - spin_lock_irqsave(&pfc->lock, flags); - - pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; - - /* - * See if the present config needs to first be de-configured. - */ - switch (pinmux_type) { - case PINMUX_TYPE_GPIO: - break; - case PINMUX_TYPE_OUTPUT: - case PINMUX_TYPE_INPUT: - case PINMUX_TYPE_INPUT_PULLUP: - case PINMUX_TYPE_INPUT_PULLDOWN: - sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); - break; - default: - goto err; - } - - /* - * Dry run - */ - if (sh_pfc_config_gpio(pfc, offset, new_type, - GPIO_CFG_DRYRUN) != 0) - goto err; - - /* - * Request - */ - if (sh_pfc_config_gpio(pfc, offset, new_type, - GPIO_CFG_REQ) != 0) - goto err; - - pfc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; - pfc->gpios[offset].flags |= new_type; - - ret = 0; - -err: - spin_unlock_irqrestore(&pfc->lock, flags); - - return ret; -} - - -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; - unsigned long flags; - int ret, pinmux_type; - - spin_lock_irqsave(&pfc->lock, flags); - - pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; - - switch (pinmux_type) { - case PINMUX_TYPE_FUNCTION: - pr_notice_once("Use of GPIO API for function requests is " - "deprecated, convert to pinctrl\n"); - /* handle for now */ - ret = sh_pfc_config_function(pfc, offset); - if (unlikely(ret < 0)) - goto err; - - break; - case PINMUX_TYPE_GPIO: - case PINMUX_TYPE_INPUT: - case PINMUX_TYPE_OUTPUT: - break; - default: - pr_err("Unsupported mux type (%d), bailing...\n", pinmux_type); - ret = -ENOTSUPP; - goto err; - } - - ret = 0; - -err: - 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; - unsigned long flags; - int pinmux_type; - - spin_lock_irqsave(&pfc->lock, flags); - - pinmux_type = pfc->gpios[offset].flags & PINMUX_FLAG_TYPE; - - sh_pfc_config_gpio(pfc, offset, pinmux_type, GPIO_CFG_FREE); - - 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); - int type = input ? PINMUX_TYPE_INPUT : PINMUX_TYPE_OUTPUT; - - return sh_pfc_reconfig_pin(pmx->pfc, offset, type); -} - -static 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_noop_enable, - .disable = sh_pfc_noop_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, -}; - -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; - - *config = pfc->gpios[pin].flags & PINMUX_FLAG_TYPE; - - 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); - - /* Validate the new type */ - if (config >= PINMUX_FLAG_TYPE) - return -EINVAL; - - return sh_pfc_reconfig_pin(pmx->pfc, pin, config); -} - -static void sh_pfc_pinconf_dbg_show(struct pinctrl_dev *pctldev, - struct seq_file *s, unsigned pin) -{ - const char *pinmux_type_str[] = { - [PINMUX_TYPE_NONE] = "none", - [PINMUX_TYPE_FUNCTION] = "function", - [PINMUX_TYPE_GPIO] = "gpio", - [PINMUX_TYPE_OUTPUT] = "output", - [PINMUX_TYPE_INPUT] = "input", - [PINMUX_TYPE_INPUT_PULLUP] = "input bias pull up", - [PINMUX_TYPE_INPUT_PULLDOWN] = "input bias pull down", - }; - unsigned long config; - int rc; - - rc = sh_pfc_pinconf_get(pctldev, pin, &config); - if (unlikely(rc != 0)) - return; - - seq_printf(s, " %s", pinmux_type_str[config]); -} - -static struct pinconf_ops sh_pfc_pinconf_ops = { - .pin_config_get = sh_pfc_pinconf_get, - .pin_config_set = sh_pfc_pinconf_set, - .pin_config_dbg_show = sh_pfc_pinconf_dbg_show, -}; - -static struct pinctrl_gpio_range sh_pfc_gpio_range = { - .name = DRV_NAME, - .id = 0, -}; - -static struct pinctrl_desc sh_pfc_pinctrl_desc = { - .name = DRV_NAME, - .owner = THIS_MODULE, - .pctlops = &sh_pfc_pinctrl_ops, - .pmxops = &sh_pfc_pinmux_ops, - .confops = &sh_pfc_pinconf_ops, -}; - -static inline void sh_pfc_map_one_gpio(struct sh_pfc *pfc, - struct sh_pfc_pinctrl *pmx, - struct pinmux_gpio *gpio, - unsigned offset) -{ - struct pinmux_data_reg *dummy; - unsigned long flags; - int bit; - - gpio->flags &= ~PINMUX_FLAG_TYPE; - - if (sh_pfc_get_data_reg(pfc, offset, &dummy, &bit) == 0) - gpio->flags |= PINMUX_TYPE_GPIO; - else { - gpio->flags |= PINMUX_TYPE_FUNCTION; - - spin_lock_irqsave(&pmx->lock, flags); - pmx->nr_functions++; - spin_unlock_irqrestore(&pmx->lock, flags); - } -} - -/* pinmux ranges -> pinctrl pin descs */ -static int sh_pfc_map_gpios(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) -{ - unsigned long flags; - int i; - - pmx->nr_pads = pfc->last_gpio - pfc->first_gpio + 1; - - pmx->pads = kmalloc(sizeof(struct pinctrl_pin_desc) * pmx->nr_pads, - GFP_KERNEL); - if (unlikely(!pmx->pads)) { - pmx->nr_pads = 0; - return -ENOMEM; - } - - spin_lock_irqsave(&pfc->lock, flags); - - /* - * We don't necessarily have a 1:1 mapping between pin and linux - * GPIO number, as the latter maps to the associated enum_id. - * Care needs to be taken to translate back to pin space when - * dealing with any pin configurations. - */ - for (i = 0; i < pmx->nr_pads; i++) { - struct pinctrl_pin_desc *pin = pmx->pads + i; - struct pinmux_gpio *gpio = pfc->gpios + i; - - pin->number = pfc->first_gpio + i; - pin->name = gpio->name; - - /* XXX */ - if (unlikely(!gpio->enum_id)) - continue; - - sh_pfc_map_one_gpio(pfc, pmx, gpio, i); - } - - spin_unlock_irqrestore(&pfc->lock, flags); - - sh_pfc_pinctrl_desc.pins = pmx->pads; - sh_pfc_pinctrl_desc.npins = pmx->nr_pads; - - return 0; -} - -static int sh_pfc_map_functions(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx) -{ - unsigned long flags; - int i, fn; - - pmx->functions = kzalloc(pmx->nr_functions * sizeof(void *), - GFP_KERNEL); - if (unlikely(!pmx->functions)) - return -ENOMEM; - - spin_lock_irqsave(&pmx->lock, flags); - - for (i = fn = 0; i < pmx->nr_pads; i++) { - struct pinmux_gpio *gpio = pfc->gpios + i; - - if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION) - pmx->functions[fn++] = gpio; - } - - spin_unlock_irqrestore(&pmx->lock, flags); - - return 0; -} - -static int sh_pfc_pinctrl_probe(struct platform_device *pdev) -{ - struct sh_pfc *pfc; - int ret; - - if (unlikely(!sh_pfc_pmx)) - return -ENODEV; - - pfc = sh_pfc_pmx->pfc; - - ret = sh_pfc_map_gpios(pfc, sh_pfc_pmx); - if (unlikely(ret != 0)) - return ret; - - ret = sh_pfc_map_functions(pfc, sh_pfc_pmx); - if (unlikely(ret != 0)) - goto free_pads; - - sh_pfc_pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, &pdev->dev, - sh_pfc_pmx); - if (IS_ERR(sh_pfc_pmx->pctl)) { - ret = PTR_ERR(sh_pfc_pmx->pctl); - goto free_functions; - } - - sh_pfc_gpio_range.npins = pfc->last_gpio - pfc->first_gpio + 1; - sh_pfc_gpio_range.base = pfc->first_gpio; - sh_pfc_gpio_range.pin_base = pfc->first_gpio; - - pinctrl_add_gpio_range(sh_pfc_pmx->pctl, &sh_pfc_gpio_range); - - platform_set_drvdata(pdev, sh_pfc_pmx); - - return 0; - -free_functions: - kfree(sh_pfc_pmx->functions); -free_pads: - kfree(sh_pfc_pmx->pads); - kfree(sh_pfc_pmx); - - return ret; -} - -static int sh_pfc_pinctrl_remove(struct platform_device *pdev) -{ - struct sh_pfc_pinctrl *pmx = platform_get_drvdata(pdev); - - pinctrl_unregister(pmx->pctl); - - platform_set_drvdata(pdev, NULL); - - kfree(sh_pfc_pmx->functions); - kfree(sh_pfc_pmx->pads); - kfree(sh_pfc_pmx); - - return 0; -} - -static struct platform_driver sh_pfc_pinctrl_driver = { - .probe = sh_pfc_pinctrl_probe, - .remove = sh_pfc_pinctrl_remove, - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, -}; - -static struct platform_device sh_pfc_pinctrl_device = { - .name = DRV_NAME, - .id = -1, -}; - -static int sh_pfc_pinctrl_init(void) -{ - int rc; - - rc = platform_driver_register(&sh_pfc_pinctrl_driver); - if (likely(!rc)) { - rc = platform_device_register(&sh_pfc_pinctrl_device); - if (unlikely(rc)) - platform_driver_unregister(&sh_pfc_pinctrl_driver); - } - - return rc; -} - -int sh_pfc_register_pinctrl(struct sh_pfc *pfc) -{ - sh_pfc_pmx = kzalloc(sizeof(struct sh_pfc_pinctrl), GFP_KERNEL); - if (unlikely(!sh_pfc_pmx)) - return -ENOMEM; - - spin_lock_init(&sh_pfc_pmx->lock); - - sh_pfc_pmx->pfc = pfc; - - return sh_pfc_pinctrl_init(); -} -EXPORT_SYMBOL_GPL(sh_pfc_register_pinctrl); - -static void __exit sh_pfc_pinctrl_exit(void) -{ - platform_driver_unregister(&sh_pfc_pinctrl_driver); -} -module_exit(sh_pfc_pinctrl_exit); |