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Diffstat (limited to 'drivers/sh/pfc/core.c')
-rw-r--r--drivers/sh/pfc/core.c586
1 files changed, 0 insertions, 586 deletions
diff --git a/drivers/sh/pfc/core.c b/drivers/sh/pfc/core.c
deleted file mode 100644
index 8e7818b..0000000
--- a/drivers/sh/pfc/core.c
+++ /dev/null
@@ -1,586 +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 DRV_NAME "sh-pfc"
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/bitops.h>
-#include <linux/err.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/ioport.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/pinctrl/machine.h>
-#include <linux/platform_device.h>
-#include <linux/sh_pfc.h>
-#include <linux/slab.h>
-
-#include "core.h"
-
-static int sh_pfc_ioremap(struct sh_pfc *pfc, struct platform_device *pdev)
-{
- struct resource *res;
- int k;
-
- if (pdev->num_resources == 0) {
- pfc->num_windows = 0;
- return 0;
- }
-
- pfc->window = devm_kzalloc(pfc->dev, pdev->num_resources *
- sizeof(*pfc->window), GFP_NOWAIT);
- if (!pfc->window)
- return -ENOMEM;
-
- pfc->num_windows = pdev->num_resources;
-
- for (k = 0, res = pdev->resource; k < pdev->num_resources; k++, res++) {
- WARN_ON(resource_type(res) != IORESOURCE_MEM);
- pfc->window[k].phys = res->start;
- pfc->window[k].size = resource_size(res);
- pfc->window[k].virt = devm_ioremap_nocache(pfc->dev, res->start,
- resource_size(res));
- if (!pfc->window[k].virt)
- return -ENOMEM;
- }
-
- return 0;
-}
-
-static void __iomem *sh_pfc_phys_to_virt(struct sh_pfc *pfc,
- unsigned long address)
-{
- struct sh_pfc_window *window;
- int k;
-
- /* scan through physical windows and convert address */
- for (k = 0; k < pfc->num_windows; 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 sh_pfc_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 sh_pfc_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 sh_pfc_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 (sh_pfc_read_raw_reg(dr->mapped_reg, dr->reg_width) >> pos) & 1;
-}
-
-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);
-
- sh_pfc_write_raw_reg(dr->mapped_reg, dr->reg_width, dr->reg_shadow);
-}
-
-static void sh_pfc_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 = sh_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 sh_pfc_read_config_reg(struct sh_pfc *pfc,
- struct pinmux_cfg_reg *crp,
- unsigned long field)
-{
- void __iomem *mapped_reg;
- unsigned long mask, pos;
-
- sh_pfc_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 (sh_pfc_read_raw_reg(mapped_reg, crp->reg_width) >> pos) & mask;
-}
-
-static void sh_pfc_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;
-
- sh_pfc_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 = sh_pfc_read_raw_reg(mapped_reg, crp->reg_width);
- data &= mask;
- data |= value;
-
- if (pfc->pdata->unlock_reg)
- sh_pfc_write_raw_reg(
- sh_pfc_phys_to_virt(pfc, pfc->pdata->unlock_reg), 32,
- ~data);
-
- sh_pfc_write_raw_reg(mapped_reg, crp->reg_width, data);
-}
-
-static int sh_pfc_setup_data_reg(struct sh_pfc *pfc, unsigned gpio)
-{
- struct pinmux_gpio *gpiop = &pfc->pdata->gpios[gpio];
- struct pinmux_data_reg *data_reg;
- int k, n;
-
- if (!sh_pfc_enum_in_range(gpiop->enum_id, &pfc->pdata->data))
- return -1;
-
- k = 0;
- while (1) {
- data_reg = pfc->pdata->data_regs + k;
-
- if (!data_reg->reg_width)
- break;
-
- data_reg->mapped_reg = sh_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 sh_pfc_setup_data_regs(struct sh_pfc *pfc)
-{
- struct pinmux_data_reg *drp;
- int k;
-
- for (k = pfc->pdata->first_gpio; k <= pfc->pdata->last_gpio; k++)
- sh_pfc_setup_data_reg(pfc, k);
-
- k = 0;
- while (1) {
- drp = pfc->pdata->data_regs + k;
-
- if (!drp->reg_width)
- break;
-
- drp->reg_shadow = sh_pfc_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->pdata->gpios[gpio];
- int k, n;
-
- if (!sh_pfc_enum_in_range(gpiop->enum_id, &pfc->pdata->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->pdata->data_regs + k;
- *bitp = n;
- return 0;
-}
-
-static int sh_pfc_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->pdata->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->pdata->gpios[gpio].enum_id;
- pinmux_enum_t *data = pfc->pdata->gpio_data;
- int k;
-
- if (!sh_pfc_enum_in_range(enum_id, &pfc->pdata->data)) {
- if (!sh_pfc_enum_in_range(enum_id, &pfc->pdata->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->pdata->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;
-}
-
-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->pdata->output;
- break;
-
- case PINMUX_TYPE_INPUT:
- range = &pfc->pdata->input;
- break;
-
- case PINMUX_TYPE_INPUT_PULLUP:
- range = &pfc->pdata->input_pu;
- break;
-
- case PINMUX_TYPE_INPUT_PULLDOWN:
- range = &pfc->pdata->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 = sh_pfc_enum_in_range(enum_id, &pfc->pdata->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 = sh_pfc_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 (sh_pfc_get_config_reg(pfc, enum_id, &cr,
- &field, &value, &cntp) != 0)
- goto out_err;
-
- switch (cfg_mode) {
- case GPIO_CFG_DRYRUN:
- if (!*cntp ||
- (sh_pfc_read_config_reg(pfc, cr, field) != value))
- continue;
- break;
-
- case GPIO_CFG_REQ:
- sh_pfc_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;
-}
-
-static int sh_pfc_probe(struct platform_device *pdev)
-{
- struct sh_pfc_platform_data *pdata = pdev->dev.platform_data;
- struct sh_pfc *pfc;
- int ret;
-
- /*
- * Ensure that the type encoding fits
- */
- BUILD_BUG_ON(PINMUX_FLAG_TYPE > ((1 << PINMUX_FLAG_DBIT_SHIFT) - 1));
-
- if (pdata == NULL)
- return -ENODEV;
-
- pfc = devm_kzalloc(&pdev->dev, sizeof(pfc), GFP_KERNEL);
- if (pfc == NULL)
- return -ENOMEM;
-
- pfc->pdata = pdata;
- pfc->dev = &pdev->dev;
-
- ret = sh_pfc_ioremap(pfc, pdev);
- if (unlikely(ret < 0))
- return ret;
-
- spin_lock_init(&pfc->lock);
-
- pinctrl_provide_dummies();
- sh_pfc_setup_data_regs(pfc);
-
- /*
- * Initialize pinctrl bindings first
- */
- ret = sh_pfc_register_pinctrl(pfc);
- if (unlikely(ret != 0))
- return ret;
-
-#ifdef CONFIG_GPIO_SH_PFC
- /*
- * Then the GPIO chip
- */
- ret = sh_pfc_register_gpiochip(pfc);
- if (unlikely(ret != 0)) {
- /*
- * 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.
- */
- pr_notice("failed to init GPIO chip, ignoring...\n");
- }
-#endif
-
- platform_set_drvdata(pdev, pfc);
-
- pr_info("%s support registered\n", pdata->name);
-
- return 0;
-}
-
-static int sh_pfc_remove(struct platform_device *pdev)
-{
- struct sh_pfc *pfc = platform_get_drvdata(pdev);
-
-#ifdef CONFIG_GPIO_SH_PFC
- sh_pfc_unregister_gpiochip(pfc);
-#endif
- sh_pfc_unregister_pinctrl(pfc);
-
- platform_set_drvdata(pdev, NULL);
-
- return 0;
-}
-
-static const struct platform_device_id sh_pfc_id_table[] = {
- { "sh-pfc", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(platform, sh_pfc_id_table);
-
-static struct platform_driver sh_pfc_driver = {
- .probe = sh_pfc_probe,
- .remove = sh_pfc_remove,
- .id_table = sh_pfc_id_table,
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init sh_pfc_init(void)
-{
- return platform_driver_register(&sh_pfc_driver);
-}
-postcore_initcall(sh_pfc_init);
-
-static void __exit sh_pfc_exit(void)
-{
- platform_driver_unregister(&sh_pfc_driver);
-}
-module_exit(sh_pfc_exit);
-
-MODULE_AUTHOR("Magnus Damm, Paul Mundt, Laurent Pinchart");
-MODULE_DESCRIPTION("Pin Control and GPIO driver for SuperH pin function controller");
-MODULE_LICENSE("GPL v2");
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