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path: root/drivers/sh/pfc.c
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Diffstat (limited to 'drivers/sh/pfc.c')
-rw-r--r--drivers/sh/pfc.c739
1 files changed, 0 insertions, 739 deletions
diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
deleted file mode 100644
index 522c6c46d1be..000000000000
--- a/drivers/sh/pfc.c
+++ /dev/null
@@ -1,739 +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.
- */
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#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>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-
-static void pfc_iounmap(struct pinmux_info *pip)
-{
- int k;
-
- for (k = 0; k < pip->num_resources; k++)
- if (pip->window[k].virt)
- iounmap(pip->window[k].virt);
-
- kfree(pip->window);
- pip->window = NULL;
-}
-
-static int pfc_ioremap(struct pinmux_info *pip)
-{
- struct resource *res;
- int k;
-
- if (!pip->num_resources)
- return 0;
-
- pip->window = kzalloc(pip->num_resources * sizeof(*pip->window),
- GFP_NOWAIT);
- if (!pip->window)
- goto err1;
-
- for (k = 0; k < pip->num_resources; k++) {
- res = pip->resource + k;
- WARN_ON(resource_type(res) != IORESOURCE_MEM);
- pip->window[k].phys = res->start;
- pip->window[k].size = resource_size(res);
- pip->window[k].virt = ioremap_nocache(res->start,
- resource_size(res));
- if (!pip->window[k].virt)
- goto err2;
- }
-
- return 0;
-
-err2:
- pfc_iounmap(pip);
-err1:
- return -1;
-}
-
-static void __iomem *pfc_phys_to_virt(struct pinmux_info *pip,
- unsigned long address)
-{
- struct pfc_window *window;
- int k;
-
- /* scan through physical windows and convert address */
- for (k = 0; k < pip->num_resources; k++) {
- window = pip->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();
-}
-
-static int gpio_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;
-}
-
-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);
-
- 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);
-}
-
-static void config_reg_helper(struct pinmux_info *gpioc,
- 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(gpioc, 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 pinmux_info *gpioc,
- struct pinmux_cfg_reg *crp,
- unsigned long field)
-{
- void __iomem *mapped_reg;
- unsigned long mask, pos;
-
- config_reg_helper(gpioc, 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 pinmux_info *gpioc,
- struct pinmux_cfg_reg *crp,
- unsigned long field, unsigned long value)
-{
- void __iomem *mapped_reg;
- unsigned long mask, pos, data;
-
- config_reg_helper(gpioc, 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 (gpioc->unlock_reg)
- gpio_write_raw_reg(pfc_phys_to_virt(gpioc, gpioc->unlock_reg),
- 32, ~data);
-
- gpio_write_raw_reg(mapped_reg, crp->reg_width, data);
-}
-
-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;
-
- data_reg->mapped_reg = pfc_phys_to_virt(gpioc, 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 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->mapped_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 *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 = gpioc->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;
-}
-
-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;
-}
-
-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, field, value;
- 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;
- field = 0;
- value = 0;
- while (1) {
- pos = get_gpio_enum_id(gpioc, 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, &gpioc->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(gpioc, enum_id, &cr,
- &field, &value, &cntp) != 0)
- goto out_err;
-
- switch (cfg_mode) {
- case GPIO_CFG_DRYRUN:
- if (!*cntp ||
- (read_config_reg(gpioc, cr, field) != value))
- continue;
- break;
-
- case GPIO_CFG_REQ:
- write_config_reg(gpioc, cr, field, value);
- *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)
- return -EINVAL;
-
- return gpio_read_bit(dr, 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);
-}
-
-static int sh_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
- struct pinmux_info *gpioc = chip_to_pinmux(chip);
- pinmux_enum_t enum_id;
- pinmux_enum_t *enum_ids;
- int i, k, pos;
-
- pos = 0;
- enum_id = 0;
- while (1) {
- pos = get_gpio_enum_id(gpioc, offset, pos, &enum_id);
- if (pos <= 0 || !enum_id)
- break;
-
- for (i = 0; i < gpioc->gpio_irq_size; i++) {
- enum_ids = gpioc->gpio_irq[i].enum_ids;
- for (k = 0; enum_ids[k]; k++) {
- if (enum_ids[k] == enum_id)
- return gpioc->gpio_irq[i].irq;
- }
- }
- }
-
- return -ENOSYS;
-}
-
-int register_pinmux(struct pinmux_info *pip)
-{
- struct gpio_chip *chip = &pip->chip;
- int ret;
-
- pr_info("%s handling gpio %d -> %d\n",
- pip->name, pip->first_gpio, pip->last_gpio);
-
- ret = pfc_ioremap(pip);
- if (ret < 0)
- return ret;
-
- 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;
- chip->to_irq = sh_gpio_to_irq;
-
- 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;
-
- ret = gpiochip_add(chip);
- if (ret < 0)
- pfc_iounmap(pip);
-
- return ret;
-}
-
-int unregister_pinmux(struct pinmux_info *pip)
-{
- pr_info("%s deregistering\n", pip->name);
- pfc_iounmap(pip);
- return gpiochip_remove(&pip->chip);
-}