diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/sh/include/asm/gpio.h | 82 | ||||
-rw-r--r-- | arch/sh/kernel/Makefile | 1 | ||||
-rw-r--r-- | arch/sh/kernel/gpio.c | 584 |
3 files changed, 1 insertions, 666 deletions
diff --git a/arch/sh/include/asm/gpio.h b/arch/sh/include/asm/gpio.h index 61f93da..f8d9a73 100644 --- a/arch/sh/include/asm/gpio.h +++ b/arch/sh/include/asm/gpio.h @@ -20,7 +20,7 @@ #endif #define ARCH_NR_GPIOS 512 -#include <asm-generic/gpio.h> +#include <linux/sh_pfc.h> #ifdef CONFIG_GPIOLIB @@ -53,84 +53,4 @@ static inline int irq_to_gpio(unsigned int irq) #endif /* CONFIG_GPIOLIB */ -typedef unsigned short pinmux_enum_t; -typedef unsigned short pinmux_flag_t; - -#define PINMUX_TYPE_NONE 0 -#define PINMUX_TYPE_FUNCTION 1 -#define PINMUX_TYPE_GPIO 2 -#define PINMUX_TYPE_OUTPUT 3 -#define PINMUX_TYPE_INPUT 4 -#define PINMUX_TYPE_INPUT_PULLUP 5 -#define PINMUX_TYPE_INPUT_PULLDOWN 6 - -#define PINMUX_FLAG_TYPE (0x7) -#define PINMUX_FLAG_WANT_PULLUP (1 << 3) -#define PINMUX_FLAG_WANT_PULLDOWN (1 << 4) - -#define PINMUX_FLAG_DBIT_SHIFT 5 -#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT) -#define PINMUX_FLAG_DREG_SHIFT 10 -#define PINMUX_FLAG_DREG (0x3f << PINMUX_FLAG_DREG_SHIFT) - -struct pinmux_gpio { - pinmux_enum_t enum_id; - pinmux_flag_t flags; -}; - -#define PINMUX_GPIO(gpio, data_or_mark) [gpio] = { data_or_mark } -#define PINMUX_DATA(data_or_mark, ids...) data_or_mark, ids, 0 - -struct pinmux_cfg_reg { - unsigned long reg, reg_width, field_width; - unsigned long *cnt; - pinmux_enum_t *enum_ids; -}; - -#define PINMUX_CFG_REG(name, r, r_width, f_width) \ - .reg = r, .reg_width = r_width, .field_width = f_width, \ - .cnt = (unsigned long [r_width / f_width]) {}, \ - .enum_ids = (pinmux_enum_t [(r_width / f_width) * (1 << f_width)]) \ - -struct pinmux_data_reg { - unsigned long reg, reg_width, reg_shadow; - pinmux_enum_t *enum_ids; -}; - -#define PINMUX_DATA_REG(name, r, r_width) \ - .reg = r, .reg_width = r_width, \ - .enum_ids = (pinmux_enum_t [r_width]) \ - -struct pinmux_range { - pinmux_enum_t begin; - pinmux_enum_t end; - pinmux_enum_t force; -}; - -struct pinmux_info { - char *name; - pinmux_enum_t reserved_id; - struct pinmux_range data; - struct pinmux_range input; - struct pinmux_range input_pd; - struct pinmux_range input_pu; - struct pinmux_range output; - struct pinmux_range mark; - struct pinmux_range function; - - unsigned first_gpio, last_gpio; - - struct pinmux_gpio *gpios; - struct pinmux_cfg_reg *cfg_regs; - struct pinmux_data_reg *data_regs; - - pinmux_enum_t *gpio_data; - unsigned int gpio_data_size; - - unsigned long *gpio_in_use; - struct gpio_chip chip; -}; - -int register_pinmux(struct pinmux_info *pip); - #endif /* __ASM_SH_GPIO_H */ diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile index 8edb927..0471a3e 100644 --- a/arch/sh/kernel/Makefile +++ b/arch/sh/kernel/Makefile @@ -32,7 +32,6 @@ obj-$(CONFIG_CRASH_DUMP) += crash_dump.o obj-$(CONFIG_STACKTRACE) += stacktrace.o obj-$(CONFIG_IO_TRAPPED) += io_trapped.o obj-$(CONFIG_KPROBES) += kprobes.o -obj-$(CONFIG_GENERIC_GPIO) += gpio.o obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o diff --git a/arch/sh/kernel/gpio.c b/arch/sh/kernel/gpio.c deleted file mode 100644 index d22e5af..0000000 --- a/arch/sh/kernel/gpio.c +++ /dev/null @@ -1,584 +0,0 @@ -/* - * Pinmuxed GPIO support for SuperH. - * - * Copyright (C) 2008 Magnus Damm - * - * 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. - */ - -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/module.h> -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/bitops.h> -#include <linux/gpio.h> - -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(unsigned long reg, - unsigned long reg_width) -{ - switch (reg_width) { - case 8: - return ctrl_inb(reg); - case 16: - return ctrl_inw(reg); - case 32: - return ctrl_inl(reg); - } - - BUG(); - return 0; -} - -static void gpio_write_raw_reg(unsigned long reg, - unsigned long reg_width, - unsigned long data) -{ - switch (reg_width) { - case 8: - ctrl_outb(data, reg); - return; - case 16: - ctrl_outw(data, reg); - return; - case 32: - ctrl_outl(data, reg); - return; - } - - BUG(); -} - -static void gpio_write_bit(struct pinmux_data_reg *dr, - unsigned long in_pos, unsigned long value) -{ - unsigned long pos; - - pos = dr->reg_width - (in_pos + 1); - -#ifdef DEBUG - pr_info("write_bit addr = %lx, value = %ld, pos = %ld, " - "r_width = %ld\n", - dr->reg, !!value, pos, dr->reg_width); -#endif - - if (value) - set_bit(pos, &dr->reg_shadow); - else - clear_bit(pos, &dr->reg_shadow); - - gpio_write_raw_reg(dr->reg, dr->reg_width, dr->reg_shadow); -} - -static int gpio_read_reg(unsigned long reg, unsigned long reg_width, - unsigned long field_width, unsigned long in_pos) -{ - unsigned long data, mask, pos; - - data = 0; - mask = (1 << field_width) - 1; - pos = reg_width - ((in_pos + 1) * field_width); - -#ifdef DEBUG - pr_info("read_reg: addr = %lx, pos = %ld, " - "r_width = %ld, f_width = %ld\n", - reg, pos, reg_width, field_width); -#endif - - data = gpio_read_raw_reg(reg, reg_width); - return (data >> pos) & mask; -} - -static void gpio_write_reg(unsigned long reg, unsigned long reg_width, - unsigned long field_width, unsigned long in_pos, - unsigned long value) -{ - unsigned long mask, pos; - - mask = (1 << field_width) - 1; - pos = reg_width - ((in_pos + 1) * field_width); - -#ifdef DEBUG - pr_info("write_reg addr = %lx, value = %ld, pos = %ld, " - "r_width = %ld, f_width = %ld\n", - reg, value, pos, reg_width, field_width); -#endif - - mask = ~(mask << pos); - value = value << pos; - - switch (reg_width) { - case 8: - ctrl_outb((ctrl_inb(reg) & mask) | value, reg); - break; - case 16: - ctrl_outw((ctrl_inw(reg) & mask) | value, reg); - break; - case 32: - ctrl_outl((ctrl_inl(reg) & mask) | value, reg); - break; - } -} - -static int setup_data_reg(struct pinmux_info *gpioc, unsigned gpio) -{ - struct pinmux_gpio *gpiop = &gpioc->gpios[gpio]; - struct pinmux_data_reg *data_reg; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &gpioc->data)) - return -1; - - k = 0; - while (1) { - data_reg = gpioc->data_regs + k; - - if (!data_reg->reg_width) - break; - - 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 pinmux_info *gpioc) -{ - struct pinmux_data_reg *drp; - int k; - - for (k = gpioc->first_gpio; k <= gpioc->last_gpio; k++) - setup_data_reg(gpioc, k); - - k = 0; - while (1) { - drp = gpioc->data_regs + k; - - if (!drp->reg_width) - break; - - drp->reg_shadow = gpio_read_raw_reg(drp->reg, drp->reg_width); - k++; - } -} - -static int get_data_reg(struct pinmux_info *gpioc, unsigned gpio, - struct pinmux_data_reg **drp, int *bitp) -{ - struct pinmux_gpio *gpiop = &gpioc->gpios[gpio]; - int k, n; - - if (!enum_in_range(gpiop->enum_id, &gpioc->data)) - return -1; - - k = (gpiop->flags & PINMUX_FLAG_DREG) >> PINMUX_FLAG_DREG_SHIFT; - n = (gpiop->flags & PINMUX_FLAG_DBIT) >> PINMUX_FLAG_DBIT_SHIFT; - *drp = gpioc->data_regs + k; - *bitp = n; - return 0; -} - -static int get_config_reg(struct pinmux_info *gpioc, pinmux_enum_t enum_id, - struct pinmux_cfg_reg **crp, int *indexp, - unsigned long **cntp) -{ - struct pinmux_cfg_reg *config_reg; - unsigned long r_width, f_width; - int k, n; - - k = 0; - while (1) { - config_reg = gpioc->cfg_regs + k; - - r_width = config_reg->reg_width; - f_width = config_reg->field_width; - - if (!r_width) - break; - for (n = 0; n < (r_width / f_width) * 1 << f_width; n++) { - if (config_reg->enum_ids[n] == enum_id) { - *crp = config_reg; - *indexp = n; - *cntp = &config_reg->cnt[n / (1 << f_width)]; - return 0; - } - } - k++; - } - - return -1; -} - -static int get_gpio_enum_id(struct pinmux_info *gpioc, unsigned gpio, - int pos, pinmux_enum_t *enum_idp) -{ - pinmux_enum_t enum_id = gpioc->gpios[gpio].enum_id; - pinmux_enum_t *data = gpioc->gpio_data; - int k; - - if (!enum_in_range(enum_id, &gpioc->data)) { - if (!enum_in_range(enum_id, &gpioc->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 < gpioc->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; -} - -static void write_config_reg(struct pinmux_info *gpioc, - struct pinmux_cfg_reg *crp, - int index) -{ - unsigned long ncomb, pos, value; - - ncomb = 1 << crp->field_width; - pos = index / ncomb; - value = index % ncomb; - - gpio_write_reg(crp->reg, crp->reg_width, crp->field_width, pos, value); -} - -static int check_config_reg(struct pinmux_info *gpioc, - struct pinmux_cfg_reg *crp, - int index) -{ - unsigned long ncomb, pos, value; - - ncomb = 1 << crp->field_width; - pos = index / ncomb; - value = index % ncomb; - - if (gpio_read_reg(crp->reg, crp->reg_width, - crp->field_width, pos) == value) - return 0; - - return -1; -} - -enum { GPIO_CFG_DRYRUN, GPIO_CFG_REQ, GPIO_CFG_FREE }; - -static int pinmux_config_gpio(struct pinmux_info *gpioc, 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, index; - unsigned long *cntp; - - switch (pinmux_type) { - - case PINMUX_TYPE_FUNCTION: - range = NULL; - break; - - case PINMUX_TYPE_OUTPUT: - range = &gpioc->output; - break; - - case PINMUX_TYPE_INPUT: - range = &gpioc->input; - break; - - case PINMUX_TYPE_INPUT_PULLUP: - range = &gpioc->input_pu; - break; - - case PINMUX_TYPE_INPUT_PULLDOWN: - range = &gpioc->input_pd; - break; - - default: - goto out_err; - } - - pos = 0; - enum_id = 0; - index = 0; - while (1) { - pos = get_gpio_enum_id(gpioc, gpio, pos, &enum_id); - if (pos <= 0) - goto out_err; - - if (!enum_id) - break; - - in_range = enum_in_range(enum_id, &gpioc->function); - if (!in_range && range) { - in_range = enum_in_range(enum_id, range); - - if (in_range && enum_id == range->force) - continue; - } - - if (!in_range) - continue; - - if (get_config_reg(gpioc, enum_id, &cr, &index, &cntp) != 0) - goto out_err; - - switch (cfg_mode) { - case GPIO_CFG_DRYRUN: - if (!*cntp || !check_config_reg(gpioc, cr, index)) - continue; - break; - - case GPIO_CFG_REQ: - write_config_reg(gpioc, cr, index); - *cntp = *cntp + 1; - break; - - case GPIO_CFG_FREE: - *cntp = *cntp - 1; - break; - } - } - - return 0; - out_err: - return -1; -} - -static DEFINE_SPINLOCK(gpio_lock); - -static struct pinmux_info *chip_to_pinmux(struct gpio_chip *chip) -{ - return container_of(chip, struct pinmux_info, chip); -} - -static int sh_gpio_request(struct gpio_chip *chip, unsigned offset) -{ - struct pinmux_info *gpioc = chip_to_pinmux(chip); - struct pinmux_data_reg *dummy; - unsigned long flags; - int i, ret, pinmux_type; - - ret = -EINVAL; - - if (!gpioc) - goto err_out; - - spin_lock_irqsave(&gpio_lock, flags); - - if ((gpioc->gpios[offset].flags & PINMUX_FLAG_TYPE) != PINMUX_TYPE_NONE) - goto err_unlock; - - /* setup pin function here if no data is associated with pin */ - - if (get_data_reg(gpioc, offset, &dummy, &i) != 0) - pinmux_type = PINMUX_TYPE_FUNCTION; - else - pinmux_type = PINMUX_TYPE_GPIO; - - if (pinmux_type == PINMUX_TYPE_FUNCTION) { - if (pinmux_config_gpio(gpioc, offset, - pinmux_type, - GPIO_CFG_DRYRUN) != 0) - goto err_unlock; - - if (pinmux_config_gpio(gpioc, offset, - pinmux_type, - GPIO_CFG_REQ) != 0) - BUG(); - } - - gpioc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; - gpioc->gpios[offset].flags |= pinmux_type; - - ret = 0; - err_unlock: - spin_unlock_irqrestore(&gpio_lock, flags); - err_out: - return ret; -} - -static void sh_gpio_free(struct gpio_chip *chip, unsigned offset) -{ - struct pinmux_info *gpioc = chip_to_pinmux(chip); - unsigned long flags; - int pinmux_type; - - if (!gpioc) - return; - - spin_lock_irqsave(&gpio_lock, flags); - - pinmux_type = gpioc->gpios[offset].flags & PINMUX_FLAG_TYPE; - pinmux_config_gpio(gpioc, offset, pinmux_type, GPIO_CFG_FREE); - gpioc->gpios[offset].flags &= ~PINMUX_FLAG_TYPE; - gpioc->gpios[offset].flags |= PINMUX_TYPE_NONE; - - spin_unlock_irqrestore(&gpio_lock, flags); -} - -static int pinmux_direction(struct pinmux_info *gpioc, - unsigned gpio, int new_pinmux_type) -{ - int pinmux_type; - int ret = -EINVAL; - - if (!gpioc) - goto err_out; - - pinmux_type = gpioc->gpios[gpio].flags & PINMUX_FLAG_TYPE; - - 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: - pinmux_config_gpio(gpioc, gpio, pinmux_type, GPIO_CFG_FREE); - break; - default: - goto err_out; - } - - if (pinmux_config_gpio(gpioc, gpio, - new_pinmux_type, - GPIO_CFG_DRYRUN) != 0) - goto err_out; - - if (pinmux_config_gpio(gpioc, gpio, - new_pinmux_type, - GPIO_CFG_REQ) != 0) - BUG(); - - gpioc->gpios[gpio].flags &= ~PINMUX_FLAG_TYPE; - gpioc->gpios[gpio].flags |= new_pinmux_type; - - ret = 0; - err_out: - return ret; -} - -static int sh_gpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct pinmux_info *gpioc = chip_to_pinmux(chip); - unsigned long flags; - int ret; - - spin_lock_irqsave(&gpio_lock, flags); - ret = pinmux_direction(gpioc, offset, PINMUX_TYPE_INPUT); - spin_unlock_irqrestore(&gpio_lock, flags); - - return ret; -} - -static void sh_gpio_set_value(struct pinmux_info *gpioc, - unsigned gpio, int value) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0) - BUG(); - else - gpio_write_bit(dr, bit, value); -} - -static int sh_gpio_direction_output(struct gpio_chip *chip, unsigned offset, - int value) -{ - struct pinmux_info *gpioc = chip_to_pinmux(chip); - unsigned long flags; - int ret; - - sh_gpio_set_value(gpioc, offset, value); - spin_lock_irqsave(&gpio_lock, flags); - ret = pinmux_direction(gpioc, offset, PINMUX_TYPE_OUTPUT); - spin_unlock_irqrestore(&gpio_lock, flags); - - return ret; -} - -static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio) -{ - struct pinmux_data_reg *dr = NULL; - int bit = 0; - - if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0) { - BUG(); - return 0; - } - - return gpio_read_reg(dr->reg, dr->reg_width, 1, bit); -} - -static int sh_gpio_get(struct gpio_chip *chip, unsigned offset) -{ - return sh_gpio_get_value(chip_to_pinmux(chip), offset); -} - -static void sh_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - sh_gpio_set_value(chip_to_pinmux(chip), offset, value); -} - -int register_pinmux(struct pinmux_info *pip) -{ - struct gpio_chip *chip = &pip->chip; - - pr_info("sh pinmux: %s handling gpio %d -> %d\n", - pip->name, pip->first_gpio, pip->last_gpio); - - setup_data_regs(pip); - - chip->request = sh_gpio_request; - chip->free = sh_gpio_free; - chip->direction_input = sh_gpio_direction_input; - chip->get = sh_gpio_get; - chip->direction_output = sh_gpio_direction_output; - chip->set = sh_gpio_set; - - WARN_ON(pip->first_gpio != 0); /* needs testing */ - - chip->label = pip->name; - chip->owner = THIS_MODULE; - chip->base = pip->first_gpio; - chip->ngpio = (pip->last_gpio - pip->first_gpio) + 1; - - return gpiochip_add(chip); -} |