--- /dev/null
+/*
+ * U-Boot Marvell 37xx SoC pinctrl driver
+ *
+ * Copyright (C) 2017 Stefan Roese <sr@denx.de>
+ *
+ * This driver is based on the Linux driver version, which is:
+ * Copyright (C) 2017 Marvell
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ *
+ * Additionally parts are derived from the Meson U-Boot pinctrl driver,
+ * which is:
+ * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
+ * Based on code from Linux kernel:
+ * Copyright (C) 2016 Endless Mobile, Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ * https://spdx.org/licenses
+ */
+
+#include <common.h>
+#include <config.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/pinctrl.h>
+#include <dm/root.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <regmap.h>
+#include <asm/gpio.h>
+#include <asm/system.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define OUTPUT_EN 0x0
+#define INPUT_VAL 0x10
+#define OUTPUT_VAL 0x18
+#define OUTPUT_CTL 0x20
+#define SELECTION 0x30
+
+#define IRQ_EN 0x0
+#define IRQ_POL 0x08
+#define IRQ_STATUS 0x10
+#define IRQ_WKUP 0x18
+
+#define NB_FUNCS 2
+#define GPIO_PER_REG 32
+
+/**
+ * struct armada_37xx_pin_group: represents group of pins of a pinmux function.
+ * The pins of a pinmux groups are composed of one or two groups of contiguous
+ * pins.
+ * @name: Name of the pin group, used to lookup the group.
+ * @start_pins: Index of the first pin of the main range of pins belonging to
+ * the group
+ * @npins: Number of pins included in the first range
+ * @reg_mask: Bit mask matching the group in the selection register
+ * @extra_pins: Index of the first pin of the optional second range of pins
+ * belonging to the group
+ * @npins: Number of pins included in the second optional range
+ * @funcs: A list of pinmux functions that can be selected for this group.
+ * @pins: List of the pins included in the group
+ */
+struct armada_37xx_pin_group {
+ const char *name;
+ unsigned int start_pin;
+ unsigned int npins;
+ u32 reg_mask;
+ u32 val[NB_FUNCS];
+ unsigned int extra_pin;
+ unsigned int extra_npins;
+ const char *funcs[NB_FUNCS];
+ unsigned int *pins;
+};
+
+struct armada_37xx_pin_data {
+ u8 nr_pins;
+ char *name;
+ struct armada_37xx_pin_group *groups;
+ int ngroups;
+};
+
+struct armada_37xx_pmx_func {
+ const char *name;
+ const char **groups;
+ unsigned int ngroups;
+};
+
+struct armada_37xx_pinctrl {
+ void __iomem *base;
+ const struct armada_37xx_pin_data *data;
+ struct udevice *dev;
+ struct pinctrl_dev *pctl_dev;
+ struct armada_37xx_pin_group *groups;
+ unsigned int ngroups;
+ struct armada_37xx_pmx_func *funcs;
+ unsigned int nfuncs;
+};
+
+#define PIN_GRP(_name, _start, _nr, _mask, _func1, _func2) \
+ { \
+ .name = _name, \
+ .start_pin = _start, \
+ .npins = _nr, \
+ .reg_mask = _mask, \
+ .val = {0, _mask}, \
+ .funcs = {_func1, _func2} \
+ }
+
+#define PIN_GRP_GPIO(_name, _start, _nr, _mask, _func1) \
+ { \
+ .name = _name, \
+ .start_pin = _start, \
+ .npins = _nr, \
+ .reg_mask = _mask, \
+ .val = {0, _mask}, \
+ .funcs = {_func1, "gpio"} \
+ }
+
+#define PIN_GRP_GPIO_2(_name, _start, _nr, _mask, _val1, _val2, _func1) \
+ { \
+ .name = _name, \
+ .start_pin = _start, \
+ .npins = _nr, \
+ .reg_mask = _mask, \
+ .val = {_val1, _val2}, \
+ .funcs = {_func1, "gpio"} \
+ }
+
+#define PIN_GRP_EXTRA(_name, _start, _nr, _mask, _v1, _v2, _start2, _nr2, \
+ _f1, _f2) \
+ { \
+ .name = _name, \
+ .start_pin = _start, \
+ .npins = _nr, \
+ .reg_mask = _mask, \
+ .val = {_v1, _v2}, \
+ .extra_pin = _start2, \
+ .extra_npins = _nr2, \
+ .funcs = {_f1, _f2} \
+ }
+
+static struct armada_37xx_pin_group armada_37xx_nb_groups[] = {
+ PIN_GRP_GPIO("jtag", 20, 5, BIT(0), "jtag"),
+ PIN_GRP_GPIO("sdio0", 8, 3, BIT(1), "sdio"),
+ PIN_GRP_GPIO("emmc_nb", 27, 9, BIT(2), "emmc"),
+ PIN_GRP_GPIO("pwm0", 11, 1, BIT(3), "pwm"),
+ PIN_GRP_GPIO("pwm1", 12, 1, BIT(4), "pwm"),
+ PIN_GRP_GPIO("pwm2", 13, 1, BIT(5), "pwm"),
+ PIN_GRP_GPIO("pwm3", 14, 1, BIT(6), "pwm"),
+ PIN_GRP_GPIO("pmic1", 17, 1, BIT(7), "pmic"),
+ PIN_GRP_GPIO("pmic0", 16, 1, BIT(8), "pmic"),
+ PIN_GRP_GPIO("i2c2", 2, 2, BIT(9), "i2c"),
+ PIN_GRP_GPIO("i2c1", 0, 2, BIT(10), "i2c"),
+ PIN_GRP_GPIO("spi_cs1", 17, 1, BIT(12), "spi"),
+ PIN_GRP_GPIO_2("spi_cs2", 18, 1, BIT(13) | BIT(19), 0, BIT(13), "spi"),
+ PIN_GRP_GPIO_2("spi_cs3", 19, 1, BIT(14) | BIT(19), 0, BIT(14), "spi"),
+ PIN_GRP_GPIO("onewire", 4, 1, BIT(16), "onewire"),
+ PIN_GRP_GPIO("uart1", 25, 2, BIT(17), "uart"),
+ PIN_GRP_GPIO("spi_quad", 15, 2, BIT(18), "spi"),
+ PIN_GRP_EXTRA("uart2", 9, 2, BIT(13) | BIT(14) | BIT(19),
+ BIT(13) | BIT(14), BIT(19), 18, 2, "gpio", "uart"),
+ PIN_GRP_GPIO("led0_od", 11, 1, BIT(20), "led"),
+ PIN_GRP_GPIO("led1_od", 12, 1, BIT(21), "led"),
+ PIN_GRP_GPIO("led2_od", 13, 1, BIT(22), "led"),
+ PIN_GRP_GPIO("led3_od", 14, 1, BIT(23), "led"),
+
+};
+
+static struct armada_37xx_pin_group armada_37xx_sb_groups[] = {
+ PIN_GRP_GPIO("usb32_drvvbus0", 0, 1, BIT(0), "drvbus"),
+ PIN_GRP_GPIO("usb2_drvvbus1", 1, 1, BIT(1), "drvbus"),
+ PIN_GRP_GPIO("sdio_sb", 24, 5, BIT(2), "sdio"),
+ PIN_GRP_EXTRA("rgmii", 6, 14, BIT(3), 0, BIT(3), 23, 1, "mii", "gpio"),
+ PIN_GRP_GPIO("pcie1", 3, 2, BIT(4), "pcie"),
+ PIN_GRP_GPIO("ptp", 20, 3, BIT(5), "ptp"),
+ PIN_GRP("ptp_clk", 21, 1, BIT(6), "ptp", "mii"),
+ PIN_GRP("ptp_trig", 22, 1, BIT(7), "ptp", "mii"),
+ PIN_GRP("mii_col", 23, 1, BIT(8), "mii", "mii_err"),
+};
+
+const struct armada_37xx_pin_data armada_37xx_pin_nb = {
+ .nr_pins = 36,
+ .name = "GPIO1",
+ .groups = armada_37xx_nb_groups,
+ .ngroups = ARRAY_SIZE(armada_37xx_nb_groups),
+};
+
+const struct armada_37xx_pin_data armada_37xx_pin_sb = {
+ .nr_pins = 29,
+ .name = "GPIO2",
+ .groups = armada_37xx_sb_groups,
+ .ngroups = ARRAY_SIZE(armada_37xx_sb_groups),
+};
+
+static inline void armada_37xx_update_reg(unsigned int *reg,
+ unsigned int offset)
+{
+ /* We never have more than 2 registers */
+ if (offset >= GPIO_PER_REG) {
+ offset -= GPIO_PER_REG;
+ *reg += sizeof(u32);
+ }
+}
+
+static int armada_37xx_get_func_reg(struct armada_37xx_pin_group *grp,
+ const char *func)
+{
+ int f;
+
+ for (f = 0; f < NB_FUNCS; f++)
+ if (!strcmp(grp->funcs[f], func))
+ return f;
+
+ return -ENOTSUPP;
+}
+
+static int armada_37xx_pmx_get_groups_count(struct udevice *dev)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+
+ return info->ngroups;
+}
+
+static const char *armada_37xx_pmx_dummy_name = "_dummy";
+
+static const char *armada_37xx_pmx_get_group_name(struct udevice *dev,
+ unsigned selector)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+
+ if (!info->groups[selector].name)
+ return armada_37xx_pmx_dummy_name;
+
+ return info->groups[selector].name;
+}
+
+static int armada_37xx_pmx_get_funcs_count(struct udevice *dev)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+
+ return info->nfuncs;
+}
+
+static const char *armada_37xx_pmx_get_func_name(struct udevice *dev,
+ unsigned selector)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+
+ return info->funcs[selector].name;
+}
+
+static int armada_37xx_pmx_set_by_name(struct udevice *dev,
+ const char *name,
+ struct armada_37xx_pin_group *grp)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+ unsigned int reg = SELECTION;
+ unsigned int mask = grp->reg_mask;
+ int func, val;
+
+ dev_dbg(info->dev, "enable function %s group %s\n",
+ name, grp->name);
+
+ func = armada_37xx_get_func_reg(grp, name);
+
+ if (func < 0)
+ return func;
+
+ val = grp->val[func];
+
+ clrsetbits_le32(info->base + reg, mask, val);
+
+ return 0;
+}
+
+static int armada_37xx_pmx_group_set(struct udevice *dev,
+ unsigned group_selector,
+ unsigned func_selector)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+ struct armada_37xx_pin_group *grp = &info->groups[group_selector];
+ const char *name = info->funcs[func_selector].name;
+
+ return armada_37xx_pmx_set_by_name(dev, name, grp);
+}
+
+/**
+ * armada_37xx_add_function() - Add a new function to the list
+ * @funcs: array of function to add the new one
+ * @funcsize: size of the remaining space for the function
+ * @name: name of the function to add
+ *
+ * If it is a new function then create it by adding its name else
+ * increment the number of group associated to this function.
+ */
+static int armada_37xx_add_function(struct armada_37xx_pmx_func *funcs,
+ int *funcsize, const char *name)
+{
+ int i = 0;
+
+ if (*funcsize <= 0)
+ return -EOVERFLOW;
+
+ while (funcs->ngroups) {
+ /* function already there */
+ if (strcmp(funcs->name, name) == 0) {
+ funcs->ngroups++;
+
+ return -EEXIST;
+ }
+ funcs++;
+ i++;
+ }
+
+ /* append new unique function */
+ funcs->name = name;
+ funcs->ngroups = 1;
+ (*funcsize)--;
+
+ return 0;
+}
+
+/**
+ * armada_37xx_fill_group() - complete the group array
+ * @info: info driver instance
+ *
+ * Based on the data available from the armada_37xx_pin_group array
+ * completes the last member of the struct for each function: the list
+ * of the groups associated to this function.
+ *
+ */
+static int armada_37xx_fill_group(struct armada_37xx_pinctrl *info)
+{
+ int n, num = 0, funcsize = info->data->nr_pins;
+
+ for (n = 0; n < info->ngroups; n++) {
+ struct armada_37xx_pin_group *grp = &info->groups[n];
+ int i, j, f;
+
+ grp->pins = devm_kzalloc(info->dev,
+ (grp->npins + grp->extra_npins) *
+ sizeof(*grp->pins), GFP_KERNEL);
+ if (!grp->pins)
+ return -ENOMEM;
+
+ for (i = 0; i < grp->npins; i++)
+ grp->pins[i] = grp->start_pin + i;
+
+ for (j = 0; j < grp->extra_npins; j++)
+ grp->pins[i+j] = grp->extra_pin + j;
+
+ for (f = 0; f < NB_FUNCS; f++) {
+ int ret;
+ /* check for unique functions and count groups */
+ ret = armada_37xx_add_function(info->funcs, &funcsize,
+ grp->funcs[f]);
+ if (ret == -EOVERFLOW)
+ dev_err(info->dev,
+ "More functions than pins(%d)\n",
+ info->data->nr_pins);
+ if (ret < 0)
+ continue;
+ num++;
+ }
+ }
+
+ info->nfuncs = num;
+
+ return 0;
+}
+
+/**
+ * armada_37xx_fill_funcs() - complete the funcs array
+ * @info: info driver instance
+ *
+ * Based on the data available from the armada_37xx_pin_group array
+ * completes the last two member of the struct for each group:
+ * - the list of the pins included in the group
+ * - the list of pinmux functions that can be selected for this group
+ *
+ */
+static int armada_37xx_fill_func(struct armada_37xx_pinctrl *info)
+{
+ struct armada_37xx_pmx_func *funcs = info->funcs;
+ int n;
+
+ for (n = 0; n < info->nfuncs; n++) {
+ const char *name = funcs[n].name;
+ const char **groups;
+ int g;
+
+ funcs[n].groups = devm_kzalloc(info->dev, funcs[n].ngroups *
+ sizeof(*(funcs[n].groups)),
+ GFP_KERNEL);
+ if (!funcs[n].groups)
+ return -ENOMEM;
+
+ groups = funcs[n].groups;
+
+ for (g = 0; g < info->ngroups; g++) {
+ struct armada_37xx_pin_group *gp = &info->groups[g];
+ int f;
+
+ for (f = 0; f < NB_FUNCS; f++) {
+ if (strcmp(gp->funcs[f], name) == 0) {
+ *groups = gp->name;
+ groups++;
+ }
+ }
+ }
+ }
+ return 0;
+}
+
+static int armada_37xx_gpio_get(struct udevice *dev, unsigned int offset)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ unsigned int reg = INPUT_VAL;
+ unsigned int val, mask;
+
+ armada_37xx_update_reg(®, offset);
+ mask = BIT(offset);
+
+ val = readl(info->base + reg);
+
+ return (val & mask) != 0;
+}
+
+static int armada_37xx_gpio_set(struct udevice *dev, unsigned int offset,
+ int value)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ unsigned int reg = OUTPUT_VAL;
+ unsigned int mask, val;
+
+ armada_37xx_update_reg(®, offset);
+ mask = BIT(offset);
+ val = value ? mask : 0;
+
+ clrsetbits_le32(info->base + reg, mask, val);
+
+ return 0;
+}
+
+static int armada_37xx_gpio_get_direction(struct udevice *dev,
+ unsigned int offset)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ unsigned int reg = OUTPUT_EN;
+ unsigned int val, mask;
+
+ armada_37xx_update_reg(®, offset);
+ mask = BIT(offset);
+ val = readl(info->base + reg);
+
+ if (val & mask)
+ return GPIOF_OUTPUT;
+ else
+ return GPIOF_INPUT;
+}
+
+static int armada_37xx_gpio_direction_input(struct udevice *dev,
+ unsigned int offset)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ unsigned int reg = OUTPUT_EN;
+ unsigned int mask;
+
+ armada_37xx_update_reg(®, offset);
+ mask = BIT(offset);
+
+ clrbits_le32(info->base + reg, mask);
+
+ return 0;
+}
+
+static int armada_37xx_gpio_direction_output(struct udevice *dev,
+ unsigned int offset, int value)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ unsigned int reg = OUTPUT_EN;
+ unsigned int mask;
+
+ armada_37xx_update_reg(®, offset);
+ mask = BIT(offset);
+
+ setbits_le32(info->base + reg, mask);
+
+ /* And set the requested value */
+ return armada_37xx_gpio_set(dev, offset, value);
+}
+
+static int armada_37xx_gpio_probe(struct udevice *dev)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev->parent);
+ struct gpio_dev_priv *uc_priv;
+
+ uc_priv = dev_get_uclass_priv(dev);
+ uc_priv->bank_name = info->data->name;
+ uc_priv->gpio_count = info->data->nr_pins;
+
+ return 0;
+}
+
+static const struct dm_gpio_ops armada_37xx_gpio_ops = {
+ .set_value = armada_37xx_gpio_set,
+ .get_value = armada_37xx_gpio_get,
+ .get_function = armada_37xx_gpio_get_direction,
+ .direction_input = armada_37xx_gpio_direction_input,
+ .direction_output = armada_37xx_gpio_direction_output,
+};
+
+static struct driver armada_37xx_gpio_driver = {
+ .name = "armada-37xx-gpio",
+ .id = UCLASS_GPIO,
+ .probe = armada_37xx_gpio_probe,
+ .ops = &armada_37xx_gpio_ops,
+};
+
+static int armada_37xx_gpiochip_register(struct udevice *parent,
+ struct armada_37xx_pinctrl *info)
+{
+ const void *blob = gd->fdt_blob;
+ int node = dev_of_offset(parent);
+ struct uclass_driver *drv;
+ struct udevice *dev;
+ int ret = -ENODEV;
+ int subnode;
+ char *name;
+
+ /* Lookup GPIO driver */
+ drv = lists_uclass_lookup(UCLASS_GPIO);
+ if (!drv) {
+ puts("Cannot find GPIO driver\n");
+ return -ENOENT;
+ }
+
+ fdt_for_each_subnode(subnode, blob, node) {
+ if (!fdtdec_get_bool(blob, subnode, "gpio-controller")) {
+ ret = 0;
+ break;
+ }
+ };
+ if (ret)
+ return ret;
+
+ name = calloc(1, 32);
+ sprintf(name, "armada-37xx-gpio");
+
+ /* Create child device UCLASS_GPIO and bind it */
+ device_bind(parent, &armada_37xx_gpio_driver, name, NULL, subnode,
+ &dev);
+ dev_set_of_offset(dev, subnode);
+
+ return 0;
+}
+
+const struct pinctrl_ops armada_37xx_pinctrl_ops = {
+ .get_groups_count = armada_37xx_pmx_get_groups_count,
+ .get_group_name = armada_37xx_pmx_get_group_name,
+ .get_functions_count = armada_37xx_pmx_get_funcs_count,
+ .get_function_name = armada_37xx_pmx_get_func_name,
+ .pinmux_group_set = armada_37xx_pmx_group_set,
+ .set_state = pinctrl_generic_set_state,
+};
+
+int armada_37xx_pinctrl_probe(struct udevice *dev)
+{
+ struct armada_37xx_pinctrl *info = dev_get_priv(dev);
+ const struct armada_37xx_pin_data *pin_data;
+ int ret;
+
+ info->data = (struct armada_37xx_pin_data *)dev_get_driver_data(dev);
+ pin_data = info->data;
+
+ info->base = (void __iomem *)dev_get_addr(dev);
+ if (!info->base) {
+ error("unable to find regmap\n");
+ return -ENODEV;
+ }
+
+ info->groups = pin_data->groups;
+ info->ngroups = pin_data->ngroups;
+
+ /*
+ * we allocate functions for number of pins and hope there are
+ * fewer unique functions than pins available
+ */
+ info->funcs = devm_kzalloc(info->dev, pin_data->nr_pins *
+ sizeof(struct armada_37xx_pmx_func), GFP_KERNEL);
+ if (!info->funcs)
+ return -ENOMEM;
+
+
+ ret = armada_37xx_fill_group(info);
+ if (ret)
+ return ret;
+
+ ret = armada_37xx_fill_func(info);
+ if (ret)
+ return ret;
+
+ ret = armada_37xx_gpiochip_register(dev, info);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct udevice_id armada_37xx_pinctrl_of_match[] = {
+ {
+ .compatible = "marvell,armada3710-sb-pinctrl",
+ .data = (ulong)&armada_37xx_pin_sb,
+ },
+ {
+ .compatible = "marvell,armada3710-nb-pinctrl",
+ .data = (ulong)&armada_37xx_pin_nb,
+ },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(armada_37xx_pinctrl) = {
+ .name = "armada-37xx-pinctrl",
+ .id = UCLASS_PINCTRL,
+ .of_match = of_match_ptr(armada_37xx_pinctrl_of_match),
+ .probe = armada_37xx_pinctrl_probe,
+ .priv_auto_alloc_size = sizeof(struct armada_37xx_pinctrl),
+ .ops = &armada_37xx_pinctrl_ops,
+};
projects / oweals / u-boot.git / commitdiff