select PINCONF
source "drivers/pinctrl/mvebu/Kconfig"
-
+source "drivers/pinctrl/sh-pfc/Kconfig"
source "drivers/pinctrl/spear/Kconfig"
config PINCTRL_XWAY
obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o
obj-$(CONFIG_PLAT_ORION) += mvebu/
+obj-$(CONFIG_ARCH_SHMOBILE) += sh-pfc/
+obj-$(CONFIG_SUPERH) += sh-pfc/
obj-$(CONFIG_PLAT_SPEAR) += spear/
--- /dev/null
+#
+# Renesas SH and SH Mobile PINCTRL drivers
+#
+
+if ARCH_SHMOBILE || SUPERH
+
+config PINCTRL_SH_PFC
+ # XXX move off the gpio dependency
+ depends on GENERIC_GPIO
+ select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
+ select PINMUX
+ select PINCONF
+ def_bool y
+ help
+ This enables pin control drivers for SH and SH Mobile platforms
+
+config GPIO_SH_PFC
+ bool "SuperH PFC GPIO support"
+ depends on PINCTRL_SH_PFC && GPIOLIB
+ help
+ This enables support for GPIOs within the SoC's pin function
+ controller.
+
+endif
--- /dev/null
+sh-pfc-objs = core.o pinctrl.o
+ifeq ($(CONFIG_GPIO_SH_PFC),y)
+sh-pfc-objs += gpio.o
+endif
+obj-$(CONFIG_PINCTRL_SH_PFC) += sh-pfc.o
--- /dev/null
+/*
+ * 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");
--- /dev/null
+/*
+ * SuperH Pin Function Controller support.
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * 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.
+ */
+#ifndef __SH_PFC_CORE_H__
+#define __SH_PFC_CORE_H__
+
+#include <linux/compiler.h>
+#include <linux/sh_pfc.h>
+#include <linux/types.h>
+
+struct sh_pfc_window {
+ phys_addr_t phys;
+ void __iomem *virt;
+ unsigned long size;
+};
+
+struct sh_pfc_chip;
+struct sh_pfc_pinctrl;
+
+struct sh_pfc {
+ struct device *dev;
+ struct sh_pfc_platform_data *pdata;
+ spinlock_t lock;
+
+ unsigned int num_windows;
+ struct sh_pfc_window *window;
+
+ struct sh_pfc_chip *gpio;
+ struct sh_pfc_pinctrl *pinctrl;
+};
+
+int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
+int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc);
+
+int sh_pfc_register_pinctrl(struct sh_pfc *pfc);
+int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc);
+
+int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos);
+void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
+ unsigned long value);
+int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
+ struct pinmux_data_reg **drp, int *bitp);
+int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
+ pinmux_enum_t *enum_idp);
+int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
+ int cfg_mode);
+
+#endif /* __SH_PFC_CORE_H__ */
--- /dev/null
+/*
+ * 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) KBUILD_MODNAME " gpio: " fmt
+
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/sh_pfc.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "core.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 (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 (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->pdata->gpio_irq_size; i++) {
+ enum_ids = pfc->pdata->gpio_irq[i].enum_ids;
+ for (k = 0; enum_ids[k]; k++) {
+ if (enum_ids[k] == enum_id)
+ return pfc->pdata->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->pdata->first_gpio != 0); /* needs testing */
+
+ gc->label = pfc->pdata->name;
+ gc->owner = THIS_MODULE;
+ gc->base = pfc->pdata->first_gpio;
+ gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1;
+}
+
+int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
+{
+ struct sh_pfc_chip *chip;
+ int ret;
+
+ chip = devm_kzalloc(pfc->dev, sizeof(*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))
+ return ret;
+
+ pfc->gpio = chip;
+
+ pr_info("%s handling gpio %d -> %d\n",
+ pfc->pdata->name, pfc->pdata->first_gpio,
+ pfc->pdata->last_gpio);
+
+ return 0;
+}
+
+int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc)
+{
+ struct sh_pfc_chip *chip = pfc->gpio;
+ int ret;
+
+ ret = gpiochip_remove(&chip->gpio_chip);
+ if (unlikely(ret < 0))
+ return ret;
+
+ pfc->gpio = NULL;
+ return 0;
+}
--- /dev/null
+/*
+ * 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 "sh-pfc"
+#define pr_fmt(fmt) KBUILD_MODNAME " pinctrl: " fmt
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/sh_pfc.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+
+#include "core.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 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 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->pdata->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->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
+ pfc->pdata->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->pdata->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->pdata->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->pdata->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 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->pdata->last_gpio - pfc->pdata->first_gpio + 1;
+
+ pmx->pads = devm_kzalloc(pfc->dev, sizeof(*pmx->pads) * 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->pdata->gpios + i;
+
+ pin->number = pfc->pdata->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 = devm_kzalloc(pfc->dev, pmx->nr_functions *
+ sizeof(*pmx->functions), 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->pdata->gpios + i;
+
+ if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
+ pmx->functions[fn++] = gpio;
+ }
+
+ spin_unlock_irqrestore(&pmx->lock, flags);
+
+ return 0;
+}
+
+int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
+{
+ struct sh_pfc_pinctrl *pmx;
+ int ret;
+
+ pmx = devm_kzalloc(pfc->dev, sizeof(*pmx), GFP_KERNEL);
+ if (unlikely(!pmx))
+ return -ENOMEM;
+
+ spin_lock_init(&pmx->lock);
+
+ pmx->pfc = pfc;
+ pfc->pinctrl = pmx;
+
+ ret = sh_pfc_map_gpios(pfc, pmx);
+ if (unlikely(ret != 0))
+ return ret;
+
+ ret = sh_pfc_map_functions(pfc, pmx);
+ if (unlikely(ret != 0))
+ return ret;
+
+ pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, pfc->dev, pmx);
+ if (IS_ERR(pmx->pctl))
+ return PTR_ERR(pmx->pctl);
+
+ sh_pfc_gpio_range.npins = pfc->pdata->last_gpio
+ - pfc->pdata->first_gpio + 1;
+ sh_pfc_gpio_range.base = pfc->pdata->first_gpio;
+ sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio;
+
+ pinctrl_add_gpio_range(pmx->pctl, &sh_pfc_gpio_range);
+
+ return 0;
+}
+
+int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc)
+{
+ struct sh_pfc_pinctrl *pmx = pfc->pinctrl;
+
+ pinctrl_unregister(pmx->pctl);
+
+ pfc->pinctrl = NULL;
+ return 0;
+}
menu "SuperH / SH-Mobile Driver Options"
source "drivers/sh/intc/Kconfig"
-source "drivers/sh/pfc/Kconfig"
endmenu
obj-$(CONFIG_HAVE_CLK) += clk/
obj-$(CONFIG_MAPLE) += maple/
-obj-$(CONFIG_SH_PFC) += pfc/
obj-$(CONFIG_SUPERHYWAY) += superhyway/
obj-y += pm_runtime.o
+++ /dev/null
-comment "Pin function controller options"
-
-config SH_PFC
- # XXX move off the gpio dependency
- depends on GENERIC_GPIO
- select GPIO_SH_PFC if ARCH_REQUIRE_GPIOLIB
- select PINCTRL_SH_PFC
- select PINCTRL
- select PINMUX
- select PINCONF
- def_bool y
-
-config GPIO_SH_PFC
- bool "SuperH PFC GPIO support"
- depends on SH_PFC && GPIOLIB
- help
- This enables support for GPIOs within the SoC's pin function
- controller.
+++ /dev/null
-sh-pfc-objs = core.o pinctrl.o
-ifeq ($(CONFIG_GPIO_SH_PFC),y)
-sh-pfc-objs += gpio.o
-endif
-obj-y += sh-pfc.o
+++ /dev/null
-/*
- * 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");
+++ /dev/null
-/*
- * SuperH Pin Function Controller support.
- *
- * Copyright (C) 2012 Renesas Solutions Corp.
- *
- * 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.
- */
-#ifndef __SH_PFC_CORE_H__
-#define __SH_PFC_CORE_H__
-
-#include <linux/compiler.h>
-#include <linux/sh_pfc.h>
-#include <linux/types.h>
-
-struct sh_pfc_window {
- phys_addr_t phys;
- void __iomem *virt;
- unsigned long size;
-};
-
-struct sh_pfc_chip;
-struct sh_pfc_pinctrl;
-
-struct sh_pfc {
- struct device *dev;
- struct sh_pfc_platform_data *pdata;
- spinlock_t lock;
-
- unsigned int num_windows;
- struct sh_pfc_window *window;
-
- struct sh_pfc_chip *gpio;
- struct sh_pfc_pinctrl *pinctrl;
-};
-
-int sh_pfc_register_gpiochip(struct sh_pfc *pfc);
-int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc);
-
-int sh_pfc_register_pinctrl(struct sh_pfc *pfc);
-int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc);
-
-int sh_pfc_read_bit(struct pinmux_data_reg *dr, unsigned long in_pos);
-void sh_pfc_write_bit(struct pinmux_data_reg *dr, unsigned long in_pos,
- unsigned long value);
-int sh_pfc_get_data_reg(struct sh_pfc *pfc, unsigned gpio,
- struct pinmux_data_reg **drp, int *bitp);
-int sh_pfc_gpio_to_enum(struct sh_pfc *pfc, unsigned gpio, int pos,
- pinmux_enum_t *enum_idp);
-int sh_pfc_config_gpio(struct sh_pfc *pfc, unsigned gpio, int pinmux_type,
- int cfg_mode);
-
-#endif /* __SH_PFC_CORE_H__ */
+++ /dev/null
-/*
- * 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) KBUILD_MODNAME " gpio: " fmt
-
-#include <linux/device.h>
-#include <linux/gpio.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/sh_pfc.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include "core.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 (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 (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->pdata->gpio_irq_size; i++) {
- enum_ids = pfc->pdata->gpio_irq[i].enum_ids;
- for (k = 0; enum_ids[k]; k++) {
- if (enum_ids[k] == enum_id)
- return pfc->pdata->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->pdata->first_gpio != 0); /* needs testing */
-
- gc->label = pfc->pdata->name;
- gc->owner = THIS_MODULE;
- gc->base = pfc->pdata->first_gpio;
- gc->ngpio = (pfc->pdata->last_gpio - pfc->pdata->first_gpio) + 1;
-}
-
-int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
-{
- struct sh_pfc_chip *chip;
- int ret;
-
- chip = devm_kzalloc(pfc->dev, sizeof(*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))
- return ret;
-
- pfc->gpio = chip;
-
- pr_info("%s handling gpio %d -> %d\n",
- pfc->pdata->name, pfc->pdata->first_gpio,
- pfc->pdata->last_gpio);
-
- return 0;
-}
-
-int sh_pfc_unregister_gpiochip(struct sh_pfc *pfc)
-{
- struct sh_pfc_chip *chip = pfc->gpio;
- int ret;
-
- ret = gpiochip_remove(&chip->gpio_chip);
- if (unlikely(ret < 0))
- return ret;
-
- pfc->gpio = NULL;
- return 0;
-}
+++ /dev/null
-/*
- * 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 "sh-pfc"
-#define pr_fmt(fmt) KBUILD_MODNAME " pinctrl: " fmt
-
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/pinctrl/consumer.h>
-#include <linux/pinctrl/pinconf.h>
-#include <linux/pinctrl/pinconf-generic.h>
-#include <linux/pinctrl/pinctrl.h>
-#include <linux/pinctrl/pinmux.h>
-#include <linux/sh_pfc.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include "core.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 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 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->pdata->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->pdata->gpios[offset].flags &= ~PINMUX_FLAG_TYPE;
- pfc->pdata->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->pdata->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->pdata->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->pdata->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 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->pdata->last_gpio - pfc->pdata->first_gpio + 1;
-
- pmx->pads = devm_kzalloc(pfc->dev, sizeof(*pmx->pads) * 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->pdata->gpios + i;
-
- pin->number = pfc->pdata->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 = devm_kzalloc(pfc->dev, pmx->nr_functions *
- sizeof(*pmx->functions), 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->pdata->gpios + i;
-
- if ((gpio->flags & PINMUX_FLAG_TYPE) == PINMUX_TYPE_FUNCTION)
- pmx->functions[fn++] = gpio;
- }
-
- spin_unlock_irqrestore(&pmx->lock, flags);
-
- return 0;
-}
-
-int sh_pfc_register_pinctrl(struct sh_pfc *pfc)
-{
- struct sh_pfc_pinctrl *pmx;
- int ret;
-
- pmx = devm_kzalloc(pfc->dev, sizeof(*pmx), GFP_KERNEL);
- if (unlikely(!pmx))
- return -ENOMEM;
-
- spin_lock_init(&pmx->lock);
-
- pmx->pfc = pfc;
- pfc->pinctrl = pmx;
-
- ret = sh_pfc_map_gpios(pfc, pmx);
- if (unlikely(ret != 0))
- return ret;
-
- ret = sh_pfc_map_functions(pfc, pmx);
- if (unlikely(ret != 0))
- return ret;
-
- pmx->pctl = pinctrl_register(&sh_pfc_pinctrl_desc, pfc->dev, pmx);
- if (IS_ERR(pmx->pctl))
- return PTR_ERR(pmx->pctl);
-
- sh_pfc_gpio_range.npins = pfc->pdata->last_gpio
- - pfc->pdata->first_gpio + 1;
- sh_pfc_gpio_range.base = pfc->pdata->first_gpio;
- sh_pfc_gpio_range.pin_base = pfc->pdata->first_gpio;
-
- pinctrl_add_gpio_range(pmx->pctl, &sh_pfc_gpio_range);
-
- return 0;
-}
-
-int sh_pfc_unregister_pinctrl(struct sh_pfc *pfc)
-{
- struct sh_pfc_pinctrl *pmx = pfc->pinctrl;
-
- pinctrl_unregister(pmx->pctl);
-
- pfc->pinctrl = NULL;
- return 0;
-}
projects / linux-block.git / commitdiff