[PATCH v2 1/7] pinctrl: UniPhier: add UniPhier pinctrl core support
Masahiro Yamada
yamada.masahiro at socionext.com
Mon Jul 13 19:40:01 PDT 2015
The core support for the pinctrl drivers for all the UniPhier SoCs.
Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
---
Changes in v2:
- drop vogus THIS_MODULE because this file is always built-in
- drop vogus "include <linux/module.h> because this file is
always built-in
drivers/pinctrl/Kconfig | 1 +
drivers/pinctrl/Makefile | 1 +
drivers/pinctrl/uniphier/Kconfig | 8 +
drivers/pinctrl/uniphier/Makefile | 1 +
drivers/pinctrl/uniphier/pinctrl-uniphier-core.c | 684 +++++++++++++++++++++++
drivers/pinctrl/uniphier/pinctrl-uniphier.h | 217 +++++++
6 files changed, 912 insertions(+)
create mode 100644 drivers/pinctrl/uniphier/Kconfig
create mode 100644 drivers/pinctrl/uniphier/Makefile
create mode 100644 drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
create mode 100644 drivers/pinctrl/uniphier/pinctrl-uniphier.h
diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 100d9ac..e6362c6 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -240,6 +240,7 @@ source "drivers/pinctrl/samsung/Kconfig"
source "drivers/pinctrl/sh-pfc/Kconfig"
source "drivers/pinctrl/spear/Kconfig"
source "drivers/pinctrl/sunxi/Kconfig"
+source "drivers/pinctrl/uniphier/Kconfig"
source "drivers/pinctrl/vt8500/Kconfig"
source "drivers/pinctrl/mediatek/Kconfig"
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index f4216d9..f6710a8 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -51,5 +51,6 @@ obj-$(CONFIG_PINCTRL_SAMSUNG) += samsung/
obj-$(CONFIG_PINCTRL_SH_PFC) += sh-pfc/
obj-$(CONFIG_PLAT_SPEAR) += spear/
obj-$(CONFIG_ARCH_SUNXI) += sunxi/
+obj-$(CONFIG_ARCH_UNIPHIER) += uniphier/
obj-$(CONFIG_ARCH_VT8500) += vt8500/
obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
diff --git a/drivers/pinctrl/uniphier/Kconfig b/drivers/pinctrl/uniphier/Kconfig
new file mode 100644
index 0000000..37e39c8
--- /dev/null
+++ b/drivers/pinctrl/uniphier/Kconfig
@@ -0,0 +1,8 @@
+if ARCH_UNIPHIER
+
+config PINCTRL_UNIPHIER_CORE
+ bool
+ select PINMUX
+ select GENERIC_PINCONF
+
+endif
diff --git a/drivers/pinctrl/uniphier/Makefile b/drivers/pinctrl/uniphier/Makefile
new file mode 100644
index 0000000..748aa1b
--- /dev/null
+++ b/drivers/pinctrl/uniphier/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PINCTRL_UNIPHIER_CORE) += pinctrl-uniphier-core.o
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
new file mode 100644
index 0000000..918f3b6
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier-core.c
@@ -0,0 +1,684 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro at socionext.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/export.h>
+#include <linux/mfd/syscon.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "pinctrl-uniphier.h"
+
+struct uniphier_pinctrl_priv {
+ struct pinctrl_dev *pctldev;
+ struct regmap *regmap;
+ struct uniphier_pinctrl_socdata *socdata;
+};
+
+static int uniphier_pctl_get_groups_count(struct pinctrl_dev *pctldev)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ return priv->socdata->groups_count;
+}
+
+static const char *uniphier_pctl_get_group_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ return priv->socdata->groups[selector].name;
+}
+
+static int uniphier_pctl_get_group_pins(struct pinctrl_dev *pctldev,
+ unsigned selector,
+ const unsigned **pins,
+ unsigned *num_pins)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ *pins = priv->socdata->groups[selector].pins;
+ *num_pins = priv->socdata->groups[selector].num_pins;
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void uniphier_pctl_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned offset)
+{
+ const struct pinctrl_pin_desc *pin = &pctldev->desc->pins[offset];
+ const char *pull_dir, *drv_str;
+
+ switch (uniphier_pin_get_pull_dir(pin->drv_data)) {
+ case UNIPHIER_PIN_PULL_UP:
+ pull_dir = "UP";
+ break;
+ case UNIPHIER_PIN_PULL_DOWN:
+ pull_dir = "DOWN";
+ break;
+ case UNIPHIER_PIN_PULL_NONE:
+ pull_dir = "NONE";
+ break;
+ default:
+ BUG();
+ }
+
+ switch (uniphier_pin_get_drv_str(pin->drv_data)) {
+ case UNIPHIER_PIN_DRV_4_8:
+ drv_str = "4/8(mA)";
+ break;
+ case UNIPHIER_PIN_DRV_8_12_16_20:
+ drv_str = "8/12/16/20(mA)";
+ break;
+ case UNIPHIER_PIN_DRV_FIXED_4:
+ drv_str = "4(mA)";
+ break;
+ case UNIPHIER_PIN_DRV_FIXED_5:
+ drv_str = "5(mA)";
+ break;
+ case UNIPHIER_PIN_DRV_FIXED_8:
+ drv_str = "8(mA)";
+ break;
+ case UNIPHIER_PIN_DRV_NONE:
+ drv_str = "NONE";
+ break;
+ default:
+ BUG();
+ }
+
+ seq_printf(s, " PULL_DIR=%s DRV_STR=%s", pull_dir, drv_str);
+}
+#endif
+
+static const struct pinctrl_ops uniphier_pctlops = {
+ .get_groups_count = uniphier_pctl_get_groups_count,
+ .get_group_name = uniphier_pctl_get_group_name,
+ .get_group_pins = uniphier_pctl_get_group_pins,
+#ifdef CONFIG_DEBUG_FS
+ .pin_dbg_show = uniphier_pctl_pin_dbg_show,
+#endif
+ .dt_node_to_map = pinconf_generic_dt_node_to_map_all,
+ .dt_free_map = pinctrl_utils_dt_free_map,
+};
+
+static int uniphier_conf_pin_bias_get(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin,
+ enum pin_config_param param)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ enum uniphier_pin_pull_dir pull_dir =
+ uniphier_pin_get_pull_dir(pin->drv_data);
+ unsigned int pupdctrl, reg, shift, val;
+ unsigned int expected = 1;
+ int ret;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (pull_dir == UNIPHIER_PIN_PULL_NONE)
+ return 0;
+ if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
+ pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
+ return -EINVAL;
+ expected = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED)
+ return 0;
+ if (pull_dir != UNIPHIER_PIN_PULL_UP)
+ return -EINVAL;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED)
+ return 0;
+ if (pull_dir != UNIPHIER_PIN_PULL_DOWN)
+ return -EINVAL;
+ break;
+ default:
+ BUG();
+ }
+
+ pupdctrl = uniphier_pin_get_pupdctrl(pin->drv_data);
+
+ reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
+ shift = pupdctrl % 32;
+
+ ret = regmap_read(priv->regmap, reg, &val);
+ if (ret)
+ return ret;
+
+ val = (val >> shift) & 1;
+
+ return (val == expected) ? 0 : -EINVAL;
+}
+
+static int uniphier_conf_pin_drive_get(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin,
+ u16 *strength)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ enum uniphier_pin_drv_str drv_str =
+ uniphier_pin_get_drv_str(pin->drv_data);
+ const unsigned int strength_4_8[] = {4, 8};
+ const unsigned int strength_8_12_16_20[] = {8, 12, 16, 20};
+ const unsigned int *supported_strength;
+ unsigned int drvctrl, reg, shift, mask, width, val;
+ int ret;
+
+ switch (drv_str) {
+ case UNIPHIER_PIN_DRV_4_8:
+ supported_strength = strength_4_8;
+ width = 1;
+ break;
+ case UNIPHIER_PIN_DRV_8_12_16_20:
+ supported_strength = strength_8_12_16_20;
+ width = 2;
+ break;
+ case UNIPHIER_PIN_DRV_FIXED_4:
+ *strength = 4;
+ return 0;
+ case UNIPHIER_PIN_DRV_FIXED_5:
+ *strength = 5;
+ return 0;
+ case UNIPHIER_PIN_DRV_FIXED_8:
+ *strength = 8;
+ return 0;
+ default:
+ /* drive strength control is not supported for this pin */
+ return -EINVAL;
+ }
+
+ drvctrl = uniphier_pin_get_drvctrl(pin->drv_data);
+ drvctrl *= width;
+
+ reg = (width == 2) ? UNIPHIER_PINCTRL_DRV2CTRL_BASE :
+ UNIPHIER_PINCTRL_DRVCTRL_BASE;
+
+ reg += drvctrl / 32 * 4;
+ shift = drvctrl % 32;
+ mask = (1U << width) - 1;
+
+ ret = regmap_read(priv->regmap, reg, &val);
+ if (ret)
+ return ret;
+
+ *strength = supported_strength[(val >> shift) & mask];
+
+ return 0;
+}
+
+static int uniphier_conf_pin_input_enable_get(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int iectrl = uniphier_pin_get_iectrl(pin->drv_data);
+ unsigned int val;
+ int ret;
+
+ if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
+ /* This pin is always input-enabled. */
+ return 0;
+
+ ret = regmap_read(priv->regmap, UNIPHIER_PINCTRL_IECTRL, &val);
+ if (ret)
+ return ret;
+
+ return val & BIT(iectrl) ? 0 : -EINVAL;
+}
+
+static int uniphier_conf_pin_config_get(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long *configs)
+{
+ const struct pinctrl_pin_desc *pin_desc = &pctldev->desc->pins[pin];
+ enum pin_config_param param = pinconf_to_config_param(*configs);
+ bool has_arg = false;
+ u16 arg;
+ int ret;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ ret = uniphier_conf_pin_bias_get(pctldev, pin_desc, param);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ ret = uniphier_conf_pin_drive_get(pctldev, pin_desc, &arg);
+ has_arg = true;
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ ret = uniphier_conf_pin_input_enable_get(pctldev, pin_desc);
+ break;
+ default:
+ /* unsupported parameter */
+ ret = -EINVAL;
+ break;
+ }
+
+ if (ret == 0 && has_arg)
+ *configs = pinconf_to_config_packed(param, arg);
+
+ return ret;
+}
+
+static int uniphier_conf_pin_bias_set(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin,
+ enum pin_config_param param,
+ u16 arg)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ enum uniphier_pin_pull_dir pull_dir =
+ uniphier_pin_get_pull_dir(pin->drv_data);
+ unsigned int pupdctrl, reg, shift;
+ unsigned int val = 1;
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ if (pull_dir == UNIPHIER_PIN_PULL_NONE)
+ return 0;
+ if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED ||
+ pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED) {
+ dev_err(pctldev->dev,
+ "can not disable pull register for pin %u (%s)\n",
+ pin->number, pin->name);
+ return -EINVAL;
+ }
+ val = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (pull_dir == UNIPHIER_PIN_PULL_UP_FIXED && arg != 0)
+ return 0;
+ if (pull_dir != UNIPHIER_PIN_PULL_UP) {
+ dev_err(pctldev->dev,
+ "pull-up is unsupported for pin %u (%s)\n",
+ pin->number, pin->name);
+ return -EINVAL;
+ }
+ if (arg == 0) {
+ dev_err(pctldev->dev, "pull-up can not be total\n");
+ return -EINVAL;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (pull_dir == UNIPHIER_PIN_PULL_DOWN_FIXED && arg != 0)
+ return 0;
+ if (pull_dir != UNIPHIER_PIN_PULL_DOWN) {
+ dev_err(pctldev->dev,
+ "pull-down is unsupported for pin %u (%s)\n",
+ pin->number, pin->name);
+ return -EINVAL;
+ }
+ if (arg == 0) {
+ dev_err(pctldev->dev, "pull-down can not be total\n");
+ return -EINVAL;
+ }
+ break;
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ if (pull_dir == UNIPHIER_PIN_PULL_NONE) {
+ dev_err(pctldev->dev,
+ "pull-up/down is unsupported for pin %u (%s)\n",
+ pin->number, pin->name);
+ return -EINVAL;
+ }
+
+ if (arg == 0)
+ return 0; /* configuration ingored */
+ break;
+ default:
+ BUG();
+ }
+
+ pupdctrl = uniphier_pin_get_pupdctrl(pin->drv_data);
+
+ reg = UNIPHIER_PINCTRL_PUPDCTRL_BASE + pupdctrl / 32 * 4;
+ shift = pupdctrl % 32;
+
+ return regmap_update_bits(priv->regmap, reg, 1 << shift, val << shift);
+}
+
+static int uniphier_conf_pin_drive_set(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin,
+ u16 strength)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ enum uniphier_pin_drv_str drv_str =
+ uniphier_pin_get_drv_str(pin->drv_data);
+ const unsigned int strength_4_8[] = {4, 8, -1};
+ const unsigned int strength_8_12_16_20[] = {8, 12, 16, 20, -1};
+ const unsigned int *supported_strength;
+ unsigned int drvctrl, reg, shift, mask, width, val;
+
+ switch (drv_str) {
+ case UNIPHIER_PIN_DRV_4_8:
+ supported_strength = strength_4_8;
+ width = 1;
+ break;
+ case UNIPHIER_PIN_DRV_8_12_16_20:
+ supported_strength = strength_8_12_16_20;
+ width = 2;
+ break;
+ default:
+ dev_err(pctldev->dev,
+ "cannot change drive strength for pin %u (%s)\n",
+ pin->number, pin->name);
+ return -EINVAL;
+ }
+
+ for (val = 0; supported_strength[val] > 0; val++) {
+ if (supported_strength[val] > strength)
+ break;
+ }
+
+ if (val == 0) {
+ dev_err(pctldev->dev,
+ "unsupported drive strength %u mA for pin %u (%s)\n",
+ strength, pin->number, pin->name);
+ return -EINVAL;
+ }
+
+ val--;
+
+ drvctrl = uniphier_pin_get_drvctrl(pin->drv_data);
+ drvctrl *= width;
+
+ reg = (width == 2) ? UNIPHIER_PINCTRL_DRV2CTRL_BASE :
+ UNIPHIER_PINCTRL_DRVCTRL_BASE;
+
+ reg += drvctrl / 32 * 4;
+ shift = drvctrl % 32;
+ mask = (1U << width) - 1;
+
+ return regmap_update_bits(priv->regmap, reg,
+ mask << shift, val << shift);
+}
+
+static int uniphier_conf_pin_input_enable(struct pinctrl_dev *pctldev,
+ const struct pinctrl_pin_desc *pin,
+ u16 enable)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ unsigned int iectrl = uniphier_pin_get_iectrl(pin->drv_data);
+
+ if (enable == 0) {
+ /*
+ * Multiple pins share one input enable, so per-pin disabling
+ * is impossible.
+ */
+ dev_err(pctldev->dev, "unable to disable input\n");
+ return -EINVAL;
+ }
+
+ if (iectrl == UNIPHIER_PIN_IECTRL_NONE)
+ /* This pin is always input-enabled. nothing to do. */
+ return 0;
+
+ return regmap_update_bits(priv->regmap, UNIPHIER_PINCTRL_IECTRL,
+ BIT(iectrl), BIT(iectrl));
+}
+
+static int uniphier_conf_pin_config_set(struct pinctrl_dev *pctldev,
+ unsigned pin,
+ unsigned long *configs,
+ unsigned num_configs)
+{
+ const struct pinctrl_pin_desc *pin_desc = &pctldev->desc->pins[pin];
+ int i, ret;
+
+ for (i = 0; i < num_configs; i++) {
+ enum pin_config_param param =
+ pinconf_to_config_param(configs[i]);
+ u16 arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ case PIN_CONFIG_BIAS_PULL_UP:
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
+ ret = uniphier_conf_pin_bias_set(pctldev, pin_desc,
+ param, arg);
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ ret = uniphier_conf_pin_drive_set(pctldev, pin_desc,
+ arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ ret = uniphier_conf_pin_input_enable(pctldev,
+ pin_desc, arg);
+ break;
+ default:
+ dev_err(pctldev->dev,
+ "unsupported configuration parameter %u\n",
+ param);
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int uniphier_conf_pin_config_group_set(struct pinctrl_dev *pctldev,
+ unsigned selector,
+ unsigned long *configs,
+ unsigned num_configs)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ const unsigned *pins = priv->socdata->groups[selector].pins;
+ unsigned num_pins = priv->socdata->groups[selector].num_pins;
+ int i, ret;
+
+ for (i = 0; i < num_pins; i++) {
+ ret = uniphier_conf_pin_config_set(pctldev, pins[i],
+ configs, num_configs);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct pinconf_ops uniphier_confops = {
+ .is_generic = true,
+ .pin_config_get = uniphier_conf_pin_config_get,
+ .pin_config_set = uniphier_conf_pin_config_set,
+ .pin_config_group_set = uniphier_conf_pin_config_group_set,
+};
+
+static int uniphier_pmx_get_functions_count(struct pinctrl_dev *pctldev)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ return priv->socdata->functions_count;
+}
+
+static const char *uniphier_pmx_get_function_name(struct pinctrl_dev *pctldev,
+ unsigned selector)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ return priv->socdata->functions[selector].name;
+}
+
+static int uniphier_pmx_get_function_groups(struct pinctrl_dev *pctldev,
+ unsigned selector,
+ const char * const **groups,
+ unsigned *num_groups)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+
+ *groups = priv->socdata->functions[selector].groups;
+ *num_groups = priv->socdata->functions[selector].num_groups;
+
+ return 0;
+}
+
+static int uniphier_pmx_set_one_mux(struct pinctrl_dev *pctldev, unsigned pin,
+ unsigned muxval)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ unsigned mux_bits = priv->socdata->mux_bits;
+ unsigned reg_stride = priv->socdata->reg_stride;
+ unsigned reg, reg_end, shift, mask;
+ int ret;
+
+ reg = UNIPHIER_PINCTRL_PINMUX_BASE + pin * mux_bits / 32 * reg_stride;
+ reg_end = reg + reg_stride;
+ shift = pin * mux_bits % 32;
+ mask = (1U << mux_bits) - 1;
+
+ /*
+ * If reg_stride is greater than 4, the MSB of each pinsel shall be
+ * stored in the offset+4.
+ */
+ for (; reg < reg_end; reg += 4) {
+ ret = regmap_update_bits(priv->regmap, reg,
+ mask << shift, muxval << shift);
+ if (ret)
+ return ret;
+ muxval >>= mux_bits;
+ }
+
+ if (priv->socdata->load_pinctrl) {
+ ret = regmap_write(priv->regmap,
+ UNIPHIER_PINCTRL_LOAD_PINMUX, 1);
+ if (ret)
+ return ret;
+ }
+
+ /* some pins need input-enabling */
+ return uniphier_conf_pin_input_enable(pctldev,
+ &pctldev->desc->pins[pin], 1);
+}
+
+static int uniphier_pmx_set_mux(struct pinctrl_dev *pctldev,
+ unsigned func_selector,
+ unsigned group_selector)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ const struct uniphier_pinctrl_group *grp =
+ &priv->socdata->groups[group_selector];
+ int i;
+ int ret;
+
+ for (i = 0; i < grp->num_pins; i++) {
+ ret = uniphier_pmx_set_one_mux(pctldev, grp->pins[i],
+ grp->muxvals[i]);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int uniphier_pmx_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct uniphier_pinctrl_priv *priv = pinctrl_dev_get_drvdata(pctldev);
+ const struct uniphier_pinctrl_group *groups = priv->socdata->groups;
+ int groups_count = priv->socdata->groups_count;
+ enum uniphier_pinmux_gpio_range_type range_type;
+ int i, j;
+
+ if (strstr(range->name, "irq"))
+ range_type = UNIPHIER_PINMUX_GPIO_RANGE_IRQ;
+ else
+ range_type = UNIPHIER_PINMUX_GPIO_RANGE_PORT;
+
+ for (i = 0; i < groups_count; i++) {
+ if (groups[i].range_type != range_type)
+ continue;
+
+ for (j = 0; j < groups[i].num_pins; j++)
+ if (groups[i].pins[j] == offset)
+ goto found;
+ }
+
+ dev_err(pctldev->dev, "pin %u does not support GPIO\n", offset);
+ return -EINVAL;
+
+found:
+ return uniphier_pmx_set_one_mux(pctldev, offset, groups[i].muxvals[j]);
+}
+
+static const struct pinmux_ops uniphier_pmxops = {
+ .get_functions_count = uniphier_pmx_get_functions_count,
+ .get_function_name = uniphier_pmx_get_function_name,
+ .get_function_groups = uniphier_pmx_get_function_groups,
+ .set_mux = uniphier_pmx_set_mux,
+ .gpio_request_enable = uniphier_pmx_gpio_request_enable,
+ .strict = true,
+};
+
+int uniphier_pinctrl_probe(struct platform_device *pdev,
+ struct pinctrl_desc *desc,
+ struct uniphier_pinctrl_socdata *socdata)
+{
+ struct device *dev = &pdev->dev;
+ struct uniphier_pinctrl_priv *priv;
+
+ if (!socdata ||
+ !socdata->groups ||
+ !socdata->groups_count ||
+ !socdata->functions ||
+ !socdata->functions_count ||
+ !socdata->mux_bits ||
+ !socdata->reg_stride) {
+ dev_err(dev, "pinctrl socdata lacks necessary members\n");
+ return -EINVAL;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = syscon_node_to_regmap(dev->of_node);
+ if (IS_ERR(priv->regmap)) {
+ dev_err(dev, "failed to get regmap\n");
+ return PTR_ERR(priv->regmap);
+ }
+
+ priv->socdata = socdata;
+ desc->pctlops = &uniphier_pctlops;
+ desc->pmxops = &uniphier_pmxops;
+ desc->confops = &uniphier_confops;
+
+ priv->pctldev = pinctrl_register(desc, dev, priv);
+ if (IS_ERR(priv->pctldev)) {
+ dev_err(dev, "failed to register UniPhier pinctrl driver\n");
+ return PTR_ERR(priv->pctldev);
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_pinctrl_probe);
+
+int uniphier_pinctrl_remove(struct platform_device *pdev)
+{
+ struct uniphier_pinctrl_priv *priv = platform_get_drvdata(pdev);
+
+ pinctrl_unregister(priv->pctldev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(uniphier_pinctrl_remove);
diff --git a/drivers/pinctrl/uniphier/pinctrl-uniphier.h b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
new file mode 100644
index 0000000..e1e98b8
--- /dev/null
+++ b/drivers/pinctrl/uniphier/pinctrl-uniphier.h
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro at socionext.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __PINCTRL_UNIPHIER_H__
+#define __PINCTRL_UNIPHIER_H__
+
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+
+#define UNIPHIER_PINCTRL_PINMUX_BASE 0x0
+#define UNIPHIER_PINCTRL_LOAD_PINMUX 0x700
+#define UNIPHIER_PINCTRL_DRVCTRL_BASE 0x800
+#define UNIPHIER_PINCTRL_DRV2CTRL_BASE 0x900
+#define UNIPHIER_PINCTRL_PUPDCTRL_BASE 0xa00
+#define UNIPHIER_PINCTRL_IECTRL 0xd00
+
+/* input enable control register bit */
+#define UNIPHIER_PIN_IECTRL_SHIFT 0
+#define UNIPHIER_PIN_IECTRL_BITS 8
+#define UNIPHIER_PIN_IECTRL_MASK ((1UL << (UNIPHIER_PIN_IECTRL_BITS)) \
+ - 1)
+
+/* drive strength control register number */
+#define UNIPHIER_PIN_DRVCTRL_SHIFT ((UNIPHIER_PIN_IECTRL_SHIFT) + \
+ (UNIPHIER_PIN_IECTRL_BITS))
+#define UNIPHIER_PIN_DRVCTRL_BITS 9
+#define UNIPHIER_PIN_DRVCTRL_MASK ((1UL << (UNIPHIER_PIN_DRVCTRL_BITS)) \
+ - 1)
+
+/* supported drive strength (mA) */
+#define UNIPHIER_PIN_DRV_STR_SHIFT ((UNIPHIER_PIN_DRVCTRL_SHIFT) + \
+ (UNIPHIER_PIN_DRVCTRL_BITS))
+#define UNIPHIER_PIN_DRV_STR_BITS 3
+#define UNIPHIER_PIN_DRV_STR_MASK ((1UL << (UNIPHIER_PIN_DRV_STR_BITS)) \
+ - 1)
+
+/* pull-up / pull-down register number */
+#define UNIPHIER_PIN_PUPDCTRL_SHIFT ((UNIPHIER_PIN_DRV_STR_SHIFT) + \
+ (UNIPHIER_PIN_DRV_STR_BITS))
+#define UNIPHIER_PIN_PUPDCTRL_BITS 9
+#define UNIPHIER_PIN_PUPDCTRL_MASK ((1UL << (UNIPHIER_PIN_PUPDCTRL_BITS))\
+ - 1)
+
+/* direction of pull register */
+#define UNIPHIER_PIN_PULL_DIR_SHIFT ((UNIPHIER_PIN_PUPDCTRL_SHIFT) + \
+ (UNIPHIER_PIN_PUPDCTRL_BITS))
+#define UNIPHIER_PIN_PULL_DIR_BITS 3
+#define UNIPHIER_PIN_PULL_DIR_MASK ((1UL << (UNIPHIER_PIN_PULL_DIR_BITS))\
+ - 1)
+
+#if UNIPHIER_PIN_PULL_DIR_SHIFT + UNIPHIER_PIN_PULL_DIR_BITS > BITS_PER_LONG
+#error "unable to pack pin attributes."
+#endif
+
+#define UNIPHIER_PIN_IECTRL_NONE (UNIPHIER_PIN_IECTRL_MASK)
+
+/* selectable drive strength */
+enum uniphier_pin_drv_str {
+ UNIPHIER_PIN_DRV_4_8, /* 2 level control: 4/8 mA */
+ UNIPHIER_PIN_DRV_8_12_16_20, /* 4 level control: 8/12/16/20 mA */
+ UNIPHIER_PIN_DRV_FIXED_4, /* fixed to 4mA */
+ UNIPHIER_PIN_DRV_FIXED_5, /* fixed to 5mA */
+ UNIPHIER_PIN_DRV_FIXED_8, /* fixed to 8mA */
+ UNIPHIER_PIN_DRV_NONE, /* no support (input only pin) */
+};
+
+/* direction of pull register (no pin supports bi-directional pull biasing) */
+enum uniphier_pin_pull_dir {
+ UNIPHIER_PIN_PULL_UP, /* pull-up or disabled */
+ UNIPHIER_PIN_PULL_DOWN, /* pull-down or disabled */
+ UNIPHIER_PIN_PULL_UP_FIXED, /* always pull-up */
+ UNIPHIER_PIN_PULL_DOWN_FIXED, /* always pull-down */
+ UNIPHIER_PIN_PULL_NONE, /* no pull register */
+};
+
+#define UNIPHIER_PIN_IECTRL(x) \
+ (((x) & (UNIPHIER_PIN_IECTRL_MASK)) << (UNIPHIER_PIN_IECTRL_SHIFT))
+#define UNIPHIER_PIN_DRVCTRL(x) \
+ (((x) & (UNIPHIER_PIN_DRVCTRL_MASK)) << (UNIPHIER_PIN_DRVCTRL_SHIFT))
+#define UNIPHIER_PIN_DRV_STR(x) \
+ (((x) & (UNIPHIER_PIN_DRV_STR_MASK)) << (UNIPHIER_PIN_DRV_STR_SHIFT))
+#define UNIPHIER_PIN_PUPDCTRL(x) \
+ (((x) & (UNIPHIER_PIN_PUPDCTRL_MASK)) << (UNIPHIER_PIN_PUPDCTRL_SHIFT))
+#define UNIPHIER_PIN_PULL_DIR(x) \
+ (((x) & (UNIPHIER_PIN_PULL_DIR_MASK)) << (UNIPHIER_PIN_PULL_DIR_SHIFT))
+
+#define UNIPHIER_PIN_ATTR_PACKED(iectrl, drvctrl, drv_str, pupdctrl, pull_dir)\
+ (UNIPHIER_PIN_IECTRL(iectrl) | \
+ UNIPHIER_PIN_DRVCTRL(drvctrl) | \
+ UNIPHIER_PIN_DRV_STR(drv_str) | \
+ UNIPHIER_PIN_PUPDCTRL(pupdctrl) | \
+ UNIPHIER_PIN_PULL_DIR(pull_dir))
+
+static inline unsigned int uniphier_pin_get_iectrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_IECTRL_SHIFT) &
+ UNIPHIER_PIN_IECTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_drvctrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_DRVCTRL_SHIFT) &
+ UNIPHIER_PIN_DRVCTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_drv_str(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_DRV_STR_SHIFT) &
+ UNIPHIER_PIN_DRV_STR_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_pupdctrl(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_PUPDCTRL_SHIFT) &
+ UNIPHIER_PIN_PUPDCTRL_MASK;
+}
+
+static inline unsigned int uniphier_pin_get_pull_dir(void *drv_data)
+{
+ return ((unsigned long)drv_data >> UNIPHIER_PIN_PULL_DIR_SHIFT) &
+ UNIPHIER_PIN_PULL_DIR_MASK;
+}
+
+enum uniphier_pinmux_gpio_range_type {
+ UNIPHIER_PINMUX_GPIO_RANGE_PORT,
+ UNIPHIER_PINMUX_GPIO_RANGE_IRQ,
+ UNIPHIER_PINMUX_GPIO_RANGE_NONE,
+};
+
+struct uniphier_pinctrl_group {
+ const char *name;
+ const unsigned *pins;
+ unsigned num_pins;
+ const unsigned *muxvals;
+ enum uniphier_pinmux_gpio_range_type range_type;
+};
+
+struct uniphier_pinmux_function {
+ const char *name;
+ const char * const *groups;
+ unsigned num_groups;
+};
+
+struct uniphier_pinctrl_socdata {
+ const struct uniphier_pinctrl_group *groups;
+ int groups_count;
+ const struct uniphier_pinmux_function *functions;
+ int functions_count;
+ unsigned mux_bits;
+ unsigned reg_stride;
+ bool load_pinctrl;
+};
+
+#define UNIPHIER_PINCTRL_PIN(a, b, c, d, e, f, g) \
+{ \
+ .number = a, \
+ .name = b, \
+ .drv_data = (void *)UNIPHIER_PIN_ATTR_PACKED(c, d, e, f, g), \
+}
+
+#define __UNIPHIER_PINCTRL_GROUP(grp, type) \
+ { \
+ .name = #grp, \
+ .pins = grp##_pins, \
+ .num_pins = ARRAY_SIZE(grp##_pins), \
+ .muxvals = grp##_muxvals + \
+ BUILD_BUG_ON_ZERO(ARRAY_SIZE(grp##_pins) != \
+ ARRAY_SIZE(grp##_muxvals)), \
+ .range_type = type, \
+ }
+
+#define UNIPHIER_PINCTRL_GROUP(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_NONE)
+
+#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_PORT(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_PORT)
+
+#define UNIPHIER_PINCTRL_GROUP_GPIO_RANGE_IRQ(grp) \
+ __UNIPHIER_PINCTRL_GROUP(grp, UNIPHIER_PINMUX_GPIO_RANGE_IRQ)
+
+#define UNIPHIER_PINCTRL_GROUP_SINGLE(grp, array, ofst) \
+ { \
+ .name = #grp, \
+ .pins = array##_pins + ofst, \
+ .num_pins = 1, \
+ .muxvals = array##_muxvals + ofst, \
+ }
+
+#define UNIPHIER_PINMUX_FUNCTION(func) \
+ { \
+ .name = #func, \
+ .groups = func##_groups, \
+ .num_groups = ARRAY_SIZE(func##_groups), \
+ }
+
+struct platform_device;
+struct pinctrl_desc;
+
+int uniphier_pinctrl_probe(struct platform_device *pdev,
+ struct pinctrl_desc *desc,
+ struct uniphier_pinctrl_socdata *socdata);
+
+int uniphier_pinctrl_remove(struct platform_device *pdev);
+
+#endif /* __PINCTRL_UNIPHIER_H__ */
--
1.9.1
More information about the linux-arm-kernel
mailing list