diff options
Diffstat (limited to 'drivers/pinctrl/cirrus/pinctrl-madera-core.c')
| -rw-r--r-- | drivers/pinctrl/cirrus/pinctrl-madera-core.c | 1076 |
1 files changed, 1076 insertions, 0 deletions
diff --git a/drivers/pinctrl/cirrus/pinctrl-madera-core.c b/drivers/pinctrl/cirrus/pinctrl-madera-core.c new file mode 100644 index 000000000000..ece41fb2848f --- /dev/null +++ b/drivers/pinctrl/cirrus/pinctrl-madera-core.c @@ -0,0 +1,1076 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Pinctrl for Cirrus Logic Madera codecs + * + * Copyright (C) 2016-2018 Cirrus Logic + * + * 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; version 2. + */ + +#include <linux/err.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> + +#include <linux/mfd/madera/core.h> +#include <linux/mfd/madera/registers.h> + +#include "../pinctrl-utils.h" + +#include "pinctrl-madera.h" + +/* + * Use pin GPIO names for consistency + * NOTE: IDs are zero-indexed for coding convenience + */ +static const struct pinctrl_pin_desc madera_pins[] = { + PINCTRL_PIN(0, "gpio1"), + PINCTRL_PIN(1, "gpio2"), + PINCTRL_PIN(2, "gpio3"), + PINCTRL_PIN(3, "gpio4"), + PINCTRL_PIN(4, "gpio5"), + PINCTRL_PIN(5, "gpio6"), + PINCTRL_PIN(6, "gpio7"), + PINCTRL_PIN(7, "gpio8"), + PINCTRL_PIN(8, "gpio9"), + PINCTRL_PIN(9, "gpio10"), + PINCTRL_PIN(10, "gpio11"), + PINCTRL_PIN(11, "gpio12"), + PINCTRL_PIN(12, "gpio13"), + PINCTRL_PIN(13, "gpio14"), + PINCTRL_PIN(14, "gpio15"), + PINCTRL_PIN(15, "gpio16"), + PINCTRL_PIN(16, "gpio17"), + PINCTRL_PIN(17, "gpio18"), + PINCTRL_PIN(18, "gpio19"), + PINCTRL_PIN(19, "gpio20"), + PINCTRL_PIN(20, "gpio21"), + PINCTRL_PIN(21, "gpio22"), + PINCTRL_PIN(22, "gpio23"), + PINCTRL_PIN(23, "gpio24"), + PINCTRL_PIN(24, "gpio25"), + PINCTRL_PIN(25, "gpio26"), + PINCTRL_PIN(26, "gpio27"), + PINCTRL_PIN(27, "gpio28"), + PINCTRL_PIN(28, "gpio29"), + PINCTRL_PIN(29, "gpio30"), + PINCTRL_PIN(30, "gpio31"), + PINCTRL_PIN(31, "gpio32"), + PINCTRL_PIN(32, "gpio33"), + PINCTRL_PIN(33, "gpio34"), + PINCTRL_PIN(34, "gpio35"), + PINCTRL_PIN(35, "gpio36"), + PINCTRL_PIN(36, "gpio37"), + PINCTRL_PIN(37, "gpio38"), + PINCTRL_PIN(38, "gpio39"), + PINCTRL_PIN(39, "gpio40"), +}; + +/* + * All single-pin functions can be mapped to any GPIO, however pinmux applies + * functions to pin groups and only those groups declared as supporting that + * function. To make this work we must put each pin in its own dummy group so + * that the functions can be described as applying to all pins. + * Since these do not correspond to anything in the actual hardware - they are + * merely an adaptation to pinctrl's view of the world - we use the same name + * as the pin to avoid confusion when comparing with datasheet instructions + */ +static const char * const madera_pin_single_group_names[] = { + "gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", + "gpio8", "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", + "gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", + "gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", + "gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", + "gpio36", "gpio37", "gpio38", "gpio39", "gpio40", +}; + +/* set of pin numbers for single-pin groups, zero-indexed */ +static const unsigned int madera_pin_single_group_pins[] = { + 0, 1, 2, 3, 4, 5, 6, + 7, 8, 9, 10, 11, 12, 13, + 14, 15, 16, 17, 18, 19, 20, + 21, 22, 23, 24, 25, 26, 27, + 28, 29, 30, 31, 32, 33, 34, + 35, 36, 37, 38, 39, +}; + +static const char * const madera_aif1_group_names[] = { "aif1" }; +static const char * const madera_aif2_group_names[] = { "aif2" }; +static const char * const madera_aif3_group_names[] = { "aif3" }; +static const char * const madera_aif4_group_names[] = { "aif4" }; +static const char * const madera_mif1_group_names[] = { "mif1" }; +static const char * const madera_mif2_group_names[] = { "mif2" }; +static const char * const madera_mif3_group_names[] = { "mif3" }; +static const char * const madera_dmic3_group_names[] = { "dmic3" }; +static const char * const madera_dmic4_group_names[] = { "dmic4" }; +static const char * const madera_dmic5_group_names[] = { "dmic5" }; +static const char * const madera_dmic6_group_names[] = { "dmic6" }; +static const char * const madera_spk1_group_names[] = { "pdmspk1" }; +static const char * const madera_spk2_group_names[] = { "pdmspk2" }; + +/* + * alt-functions always apply to a single pin group, other functions always + * apply to all pins + */ +static const struct { + const char *name; + const char * const *group_names; + u32 func; +} madera_mux_funcs[] = { + { + .name = "aif1", + .group_names = madera_aif1_group_names, + .func = 0x000 + }, + { + .name = "aif2", + .group_names = madera_aif2_group_names, + .func = 0x000 + }, + { + .name = "aif3", + .group_names = madera_aif3_group_names, + .func = 0x000 + }, + { + .name = "aif4", + .group_names = madera_aif4_group_names, + .func = 0x000 + }, + { + .name = "mif1", + .group_names = madera_mif1_group_names, + .func = 0x000 + }, + { + .name = "mif2", + .group_names = madera_mif2_group_names, + .func = 0x000 + }, + { + .name = "mif3", + .group_names = madera_mif3_group_names, + .func = 0x000 + }, + { + .name = "dmic3", + .group_names = madera_dmic3_group_names, + .func = 0x000 + }, + { + .name = "dmic4", + .group_names = madera_dmic4_group_names, + .func = 0x000 + }, + { + .name = "dmic5", + .group_names = madera_dmic5_group_names, + .func = 0x000 + }, + { + .name = "dmic6", + .group_names = madera_dmic6_group_names, + .func = 0x000 + }, + { + .name = "pdmspk1", + .group_names = madera_spk1_group_names, + .func = 0x000 + }, + { + .name = "pdmspk2", + .group_names = madera_spk2_group_names, + .func = 0x000 + }, + { + .name = "io", + .group_names = madera_pin_single_group_names, + .func = 0x001 + }, + { + .name = "dsp-gpio", + .group_names = madera_pin_single_group_names, + .func = 0x002 + }, + { + .name = "irq1", + .group_names = madera_pin_single_group_names, + .func = 0x003 + }, + { + .name = "irq2", + .group_names = madera_pin_single_group_names, + .func = 0x004 + }, + { + .name = "fll1-clk", + .group_names = madera_pin_single_group_names, + .func = 0x010 + }, + { + .name = "fll2-clk", + .group_names = madera_pin_single_group_names, + .func = 0x011 + }, + { + .name = "fll3-clk", + .group_names = madera_pin_single_group_names, + .func = 0x012 + }, + { + .name = "fllao-clk", + .group_names = madera_pin_single_group_names, + .func = 0x013 + }, + { + .name = "fll1-lock", + .group_names = madera_pin_single_group_names, + .func = 0x018 + }, + { + .name = "fll2-lock", + .group_names = madera_pin_single_group_names, + .func = 0x019 + }, + { + .name = "fll3-lock", + .group_names = madera_pin_single_group_names, + .func = 0x01a + }, + { + .name = "fllao-lock", + .group_names = madera_pin_single_group_names, + .func = 0x01b + }, + { + .name = "opclk", + .group_names = madera_pin_single_group_names, + .func = 0x040 + }, + { + .name = "opclk-async", + .group_names = madera_pin_single_group_names, + .func = 0x041 + }, + { + .name = "pwm1", + .group_names = madera_pin_single_group_names, + .func = 0x048 + }, + { + .name = "pwm2", + .group_names = madera_pin_single_group_names, + .func = 0x049 + }, + { + .name = "spdif", + .group_names = madera_pin_single_group_names, + .func = 0x04c + }, + { + .name = "asrc1-in1-lock", + .group_names = madera_pin_single_group_names, + .func = 0x088 + }, + { + .name = "asrc1-in2-lock", + .group_names = madera_pin_single_group_names, + .func = 0x089 + }, + { + .name = "asrc2-in1-lock", + .group_names = madera_pin_single_group_names, + .func = 0x08a + }, + { + .name = "asrc2-in2-lock", + .group_names = madera_pin_single_group_names, + .func = 0x08b + }, + { + .name = "spkl-short-circuit", + .group_names = madera_pin_single_group_names, + .func = 0x0b6 + }, + { + .name = "spkr-short-circuit", + .group_names = madera_pin_single_group_names, + .func = 0x0b7 + }, + { + .name = "spk-shutdown", + .group_names = madera_pin_single_group_names, + .func = 0x0e0 + }, + { + .name = "spk-overheat-shutdown", + .group_names = madera_pin_single_group_names, + .func = 0x0e1 + }, + { + .name = "spk-overheat-warn", + .group_names = madera_pin_single_group_names, + .func = 0x0e2 + }, + { + .name = "timer1-sts", + .group_names = madera_pin_single_group_names, + .func = 0x140 + }, + { + .name = "timer2-sts", + .group_names = madera_pin_single_group_names, + .func = 0x141 + }, + { + .name = "timer3-sts", + .group_names = madera_pin_single_group_names, + .func = 0x142 + }, + { + .name = "timer4-sts", + .group_names = madera_pin_single_group_names, + .func = 0x143 + }, + { + .name = "timer5-sts", + .group_names = madera_pin_single_group_names, + .func = 0x144 + }, + { + .name = "timer6-sts", + .group_names = madera_pin_single_group_names, + .func = 0x145 + }, + { + .name = "timer7-sts", + .group_names = madera_pin_single_group_names, + .func = 0x146 + }, + { + .name = "timer8-sts", + .group_names = madera_pin_single_group_names, + .func = 0x147 + }, + { + .name = "log1-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x150 + }, + { + .name = "log2-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x151 + }, + { + .name = "log3-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x152 + }, + { + .name = "log4-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x153 + }, + { + .name = "log5-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x154 + }, + { + .name = "log6-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x155 + }, + { + .name = "log7-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x156 + }, + { + .name = "log8-fifo-ne", + .group_names = madera_pin_single_group_names, + .func = 0x157 + }, +}; + +static u16 madera_pin_make_drv_str(struct madera_pin_private *priv, + unsigned int milliamps) +{ + switch (milliamps) { + case 4: + return 0; + case 8: + return 2 << MADERA_GP1_DRV_STR_SHIFT; + default: + break; + } + + dev_warn(priv->dev, "%u mA not a valid drive strength", milliamps); + + return 0; +} + +static unsigned int madera_pin_unmake_drv_str(struct madera_pin_private *priv, + u16 regval) +{ + regval = (regval & MADERA_GP1_DRV_STR_MASK) >> MADERA_GP1_DRV_STR_SHIFT; + + switch (regval) { + case 0: + return 4; + case 2: + return 8; + default: + return 0; + } +} + +static int madera_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + + /* Number of alt function groups plus number of single-pin groups */ + return priv->chip->n_pin_groups + priv->chip->n_pins; +} + +static const char *madera_get_group_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + + if (selector < priv->chip->n_pin_groups) + return priv->chip->pin_groups[selector].name; + + selector -= priv->chip->n_pin_groups; + return madera_pin_single_group_names[selector]; +} + +static int madera_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int selector, + const unsigned int **pins, + unsigned int *num_pins) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + + if (selector < priv->chip->n_pin_groups) { + *pins = priv->chip->pin_groups[selector].pins; + *num_pins = priv->chip->pin_groups[selector].n_pins; + } else { + /* return the dummy group for a single pin */ + selector -= priv->chip->n_pin_groups; + *pins = &madera_pin_single_group_pins[selector]; + *num_pins = 1; + } + return 0; +} + +static void madera_pin_dbg_show_fn(struct madera_pin_private *priv, + struct seq_file *s, + unsigned int pin, unsigned int fn) +{ + const struct madera_pin_chip *chip = priv->chip; + int i, g_pin; + + if (fn != 0) { + for (i = 0; i < ARRAY_SIZE(madera_mux_funcs); ++i) { + if (madera_mux_funcs[i].func == fn) { + seq_printf(s, " FN=%s", + madera_mux_funcs[i].name); + return; + } + } + return; /* ignore unknown function values */ + } + + /* alt function */ + for (i = 0; i < chip->n_pin_groups; ++i) { + for (g_pin = 0; g_pin < chip->pin_groups[i].n_pins; ++g_pin) { + if (chip->pin_groups[i].pins[g_pin] == pin) { + seq_printf(s, " FN=%s", + chip->pin_groups[i].name); + return; + } + } + } +} + +static void __maybe_unused madera_pin_dbg_show(struct pinctrl_dev *pctldev, + struct seq_file *s, + unsigned int pin) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + unsigned int conf[2]; + unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); + unsigned int fn; + int ret; + + ret = regmap_read(priv->madera->regmap, reg, &conf[0]); + if (ret) + return; + + ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); + if (ret) + return; + + seq_printf(s, "%04x:%04x", conf[0], conf[1]); + + fn = (conf[0] & MADERA_GP1_FN_MASK) >> MADERA_GP1_FN_SHIFT; + madera_pin_dbg_show_fn(priv, s, pin, fn); + + /* State of direction bit is only relevant if function==1 */ + if (fn == 1) { + if (conf[1] & MADERA_GP1_DIR_MASK) + seq_puts(s, " IN"); + else + seq_puts(s, " OUT"); + } + + if (conf[1] & MADERA_GP1_PU_MASK) + seq_puts(s, " PU"); + + if (conf[1] & MADERA_GP1_PD_MASK) + seq_puts(s, " PD"); + + if (conf[0] & MADERA_GP1_DB_MASK) + seq_puts(s, " DB"); + + if (conf[0] & MADERA_GP1_OP_CFG_MASK) + seq_puts(s, " OD"); + else + seq_puts(s, " CMOS"); + + seq_printf(s, " DRV=%umA", madera_pin_unmake_drv_str(priv, conf[1])); + + if (conf[0] & MADERA_GP1_IP_CFG_MASK) + seq_puts(s, "SCHMITT"); +} + + +static const struct pinctrl_ops madera_pin_group_ops = { + .get_groups_count = madera_get_groups_count, + .get_group_name = madera_get_group_name, + .get_group_pins = madera_get_group_pins, +#if IS_ENABLED(CONFIG_OF) + .dt_node_to_map = pinconf_generic_dt_node_to_map_all, + .dt_free_map = pinctrl_utils_free_map, +#endif +#if IS_ENABLED(CONFIG_DEBUG_FS) + .pin_dbg_show = madera_pin_dbg_show, +#endif +}; + +static int madera_mux_get_funcs_count(struct pinctrl_dev *pctldev) +{ + return ARRAY_SIZE(madera_mux_funcs); +} + +static const char *madera_mux_get_func_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + return madera_mux_funcs[selector].name; +} + +static int madera_mux_get_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **groups, + unsigned int * const num_groups) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + + *groups = madera_mux_funcs[selector].group_names; + + if (madera_mux_funcs[selector].func == 0) { + /* alt func always maps to a single group */ + *num_groups = 1; + } else { + /* other funcs map to all available gpio pins */ + *num_groups = priv->chip->n_pins; + } + + return 0; +} + +static int madera_mux_set_mux(struct pinctrl_dev *pctldev, + unsigned int selector, + unsigned int group) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + struct madera *madera = priv->madera; + const struct madera_pin_groups *pin_group = priv->chip->pin_groups; + unsigned int n_chip_groups = priv->chip->n_pin_groups; + const char *func_name = madera_mux_funcs[selector].name; + unsigned int reg; + int i, ret; + + dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n", + __func__, selector, func_name, group, + madera_get_group_name(pctldev, group)); + + if (madera_mux_funcs[selector].func == 0) { + /* alt func pin assignments are codec-specific */ + for (i = 0; i < n_chip_groups; ++i) { + if (strcmp(func_name, pin_group->name) == 0) + break; + + ++pin_group; + } + + if (i == n_chip_groups) + return -EINVAL; + + for (i = 0; i < pin_group->n_pins; ++i) { + reg = MADERA_GPIO1_CTRL_1 + (2 * pin_group->pins[i]); + + dev_dbg(priv->dev, "%s setting 0x%x func bits to 0\n", + __func__, reg); + + ret = regmap_update_bits(madera->regmap, reg, + MADERA_GP1_FN_MASK, 0); + if (ret) + break; + + } + } else { + /* + * for other funcs the group will be the gpio number and will + * be offset by the number of chip-specific functions at the + * start of the group list + */ + group -= n_chip_groups; + reg = MADERA_GPIO1_CTRL_1 + (2 * group); + + dev_dbg(priv->dev, "%s setting 0x%x func bits to 0x%x\n", + __func__, reg, madera_mux_funcs[selector].func); + + ret = regmap_update_bits(madera->regmap, + reg, + MADERA_GP1_FN_MASK, + madera_mux_funcs[selector].func); + } + + if (ret) + dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); + + return ret; +} + +static int madera_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset, + bool input) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + struct madera *madera = priv->madera; + unsigned int reg = MADERA_GPIO1_CTRL_2 + (2 * offset); + unsigned int val; + int ret; + + if (input) + val = MADERA_GP1_DIR; + else + val = 0; + + ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_DIR_MASK, val); + if (ret) + dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); + + return ret; +} + +static int madera_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + struct madera *madera = priv->madera; + unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); + int ret; + + /* put the pin into GPIO mode */ + ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); + if (ret) + dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); + + return ret; +} + +static void madera_gpio_disable_free(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + struct madera *madera = priv->madera; + unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); + int ret; + + /* disable GPIO by setting to GPIO IN */ + madera_gpio_set_direction(pctldev, range, offset, true); + + ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); + if (ret) + dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); +} + +static const struct pinmux_ops madera_pin_mux_ops = { + .get_functions_count = madera_mux_get_funcs_count, + .get_function_name = madera_mux_get_func_name, + .get_function_groups = madera_mux_get_groups, + .set_mux = madera_mux_set_mux, + .gpio_request_enable = madera_gpio_request_enable, + .gpio_disable_free = madera_gpio_disable_free, + .gpio_set_direction = madera_gpio_set_direction, + .strict = true, /* GPIO and other functions are exclusive */ +}; + +static int madera_pin_conf_get(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *config) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + unsigned int param = pinconf_to_config_param(*config); + unsigned int result = 0; + unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); + unsigned int conf[2]; + int ret; + + ret = regmap_read(priv->madera->regmap, reg, &conf[0]); + if (!ret) + ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); + + if (ret) { + dev_err(priv->dev, "Failed to read GP%d conf (%d)\n", + pin + 1, ret); + return ret; + } + + switch (param) { + case PIN_CONFIG_BIAS_BUS_HOLD: + conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + if (conf[1] == (MADERA_GP1_PU | MADERA_GP1_PD)) + result = 1; + break; + case PIN_CONFIG_BIAS_DISABLE: + conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + if (!conf[1]) + result = 1; + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + if (conf[1] == MADERA_GP1_PD_MASK) + result = 1; + break; + case PIN_CONFIG_BIAS_PULL_UP: + conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + if (conf[1] == MADERA_GP1_PU_MASK) + result = 1; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + if (conf[0] & MADERA_GP1_OP_CFG_MASK) + result = 1; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + if (!(conf[0] & MADERA_GP1_OP_CFG_MASK)) + result = 1; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + result = madera_pin_unmake_drv_str(priv, conf[1]); + break; + case PIN_CONFIG_INPUT_DEBOUNCE: + if (conf[0] & MADERA_GP1_DB_MASK) + result = 1; + break; + case PIN_CONFIG_INPUT_ENABLE: + if (conf[0] & MADERA_GP1_DIR_MASK) + result = 1; + break; + case PIN_CONFIG_INPUT_SCHMITT: + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + if (conf[0] & MADERA_GP1_IP_CFG_MASK) + result = 1; + break; + case PIN_CONFIG_OUTPUT: + if ((conf[1] & MADERA_GP1_DIR_MASK) && + (conf[0] & MADERA_GP1_LVL_MASK)) + result = 1; + break; + default: + break; + } + + *config = pinconf_to_config_packed(param, result); + + return 0; +} + +static int madera_pin_conf_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int num_configs) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + u16 conf[2] = {0, 0}; + u16 mask[2] = {0, 0}; + unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); + unsigned int val; + int ret; + + while (num_configs) { + dev_dbg(priv->dev, "%s config 0x%lx\n", __func__, *configs); + + switch (pinconf_to_config_param(*configs)) { + case PIN_CONFIG_BIAS_BUS_HOLD: + mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + conf[1] |= MADERA_GP1_PU | MADERA_GP1_PD; + break; + case PIN_CONFIG_BIAS_DISABLE: + mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + conf[1] &= ~(MADERA_GP1_PU | MADERA_GP1_PD); + break; + case PIN_CONFIG_BIAS_PULL_DOWN: + mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + conf[1] |= MADERA_GP1_PD; + conf[1] &= ~MADERA_GP1_PU; + break; + case PIN_CONFIG_BIAS_PULL_UP: + mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; + conf[1] |= MADERA_GP1_PU; + conf[1] &= ~MADERA_GP1_PD; + break; + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + mask[0] |= MADERA_GP1_OP_CFG_MASK; + conf[0] |= MADERA_GP1_OP_CFG; + break; + case PIN_CONFIG_DRIVE_PUSH_PULL: + mask[0] |= MADERA_GP1_OP_CFG_MASK; + conf[0] &= ~MADERA_GP1_OP_CFG; + break; + case PIN_CONFIG_DRIVE_STRENGTH: + val = pinconf_to_config_argument(*configs); + mask[1] |= MADERA_GP1_DRV_STR_MASK; + conf[1] &= ~MADERA_GP1_DRV_STR_MASK; + conf[1] |= madera_pin_make_drv_str(priv, val); + break; + case PIN_CONFIG_INPUT_DEBOUNCE: + mask[0] |= MADERA_GP1_DB_MASK; + + /* + * we can't configure debounce time per-pin so value + * is just a flag + */ + val = pinconf_to_config_argument(*configs); + if (val) + conf[0] |= MADERA_GP1_DB; + else + conf[0] &= ~MADERA_GP1_DB; + break; + case PIN_CONFIG_INPUT_ENABLE: + val = pinconf_to_config_argument(*configs); + mask[1] |= MADERA_GP1_DIR_MASK; + if (val) + conf[1] |= MADERA_GP1_DIR; + else + conf[1] &= ~MADERA_GP1_DIR; + break; + case PIN_CONFIG_INPUT_SCHMITT: + val = pinconf_to_config_argument(*configs); + mask[0] |= MADERA_GP1_IP_CFG; + if (val) + conf[0] |= MADERA_GP1_IP_CFG; + else + conf[0] &= ~MADERA_GP1_IP_CFG; + + mask[1] |= MADERA_GP1_DIR_MASK; + conf[1] |= MADERA_GP1_DIR; + break; + case PIN_CONFIG_INPUT_SCHMITT_ENABLE: + mask[0] |= MADERA_GP1_IP_CFG; + conf[0] |= MADERA_GP1_IP_CFG; + mask[1] |= MADERA_GP1_DIR_MASK; + conf[1] |= MADERA_GP1_DIR; + break; + case PIN_CONFIG_OUTPUT: + val = pinconf_to_config_argument(*configs); + mask[0] |= MADERA_GP1_LVL_MASK; + if (val) + conf[0] |= MADERA_GP1_LVL; + else + conf[0] &= ~MADERA_GP1_LVL; + + mask[1] |= MADERA_GP1_DIR_MASK; + conf[1] &= ~MADERA_GP1_DIR; + break; + default: + break; + } + + ++configs; + --num_configs; + } + + dev_dbg(priv->dev, + "%s gpio%d 0x%x:0x%x 0x%x:0x%x\n", + __func__, pin + 1, reg, conf[0], reg + 1, conf[1]); + + ret = regmap_update_bits(priv->madera->regmap, reg, mask[0], conf[0]); + if (ret) + goto err; + + ++reg; + ret = regmap_update_bits(priv->madera->regmap, reg, mask[1], conf[1]); + if (ret) + goto err; + + return 0; + +err: + dev_err(priv->dev, + "Failed to write GPIO%d conf (%d) reg 0x%x\n", + pin + 1, ret, reg); + + return ret; +} + +static int madera_pin_conf_group_set(struct pinctrl_dev *pctldev, + unsigned int selector, + unsigned long *configs, + unsigned int num_configs) +{ + struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); + const struct madera_pin_groups *pin_group; + unsigned int n_groups = priv->chip->n_pin_groups; + int i, ret; + + dev_dbg(priv->dev, "%s setting group %s\n", __func__, + madera_get_group_name(pctldev, selector)); + + if (selector >= n_groups) { + /* group is a single pin, convert to pin number and set */ + return madera_pin_conf_set(pctldev, + selector - n_groups, + configs, + num_configs); + } else { + pin_group = &priv->chip->pin_groups[selector]; + + for (i = 0; i < pin_group->n_pins; ++i) { + ret = madera_pin_conf_set(pctldev, + pin_group->pins[i], + configs, + num_configs); + if (ret) + return ret; + } + } + + return 0; +} + +static const struct pinconf_ops madera_pin_conf_ops = { + .pin_config_get = madera_pin_conf_get, + .pin_config_set = madera_pin_conf_set, + .pin_config_group_set = madera_pin_conf_group_set, + +}; + +static struct pinctrl_desc madera_pin_desc = { + .name = "madera-pinctrl", + .pins = madera_pins, + .pctlops = &madera_pin_group_ops, + .pmxops = &madera_pin_mux_ops, + .confops = &madera_pin_conf_ops, + .owner = THIS_MODULE, +}; + +static int madera_pin_probe(struct platform_device *pdev) +{ + struct madera *madera = dev_get_drvdata(pdev->dev.parent); + const struct madera_pdata *pdata = dev_get_platdata(madera->dev); + struct madera_pin_private *priv; + int ret; + + BUILD_BUG_ON(ARRAY_SIZE(madera_pin_single_group_names) != + ARRAY_SIZE(madera_pin_single_group_pins)); + + dev_dbg(&pdev->dev, "%s\n", __func__); + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + priv->madera = madera; + pdev->dev.of_node = madera->dev->of_node; + + switch (madera->type) { + case CS47L35: + if (IS_ENABLED(CONFIG_PINCTRL_CS47L35)) + priv->chip = &cs47l35_pin_chip; + break; + case CS47L85: + case WM1840: + if (IS_ENABLED(CONFIG_PINCTRL_CS47L85)) + priv->chip = &cs47l85_pin_chip; + break; + case CS47L90: + case CS47L91: + if (IS_ENABLED(CONFIG_PINCTRL_CS47L90)) + priv->chip = &cs47l90_pin_chip; + break; + default: + break; + } + + if (!priv->chip) + return -ENODEV; + + madera_pin_desc.npins = priv->chip->n_pins; + + ret = devm_pinctrl_register_and_init(&pdev->dev, + &madera_pin_desc, + priv, + &priv->pctl); + if (ret) { + dev_err(priv->dev, "Failed pinctrl register (%d)\n", ret); + return ret; + } + + /* if the configuration is provided through pdata, apply it */ + if (pdata) { + ret = pinctrl_register_mappings(pdata->gpio_configs, + pdata->n_gpio_configs); + if (ret) { + dev_err(priv->dev, + "Failed to register pdata mappings (%d)\n", + ret); + return ret; + } + } + + ret = pinctrl_enable(priv->pctl); + if (ret) { + dev_err(priv->dev, "Failed to enable pinctrl (%d)\n", ret); + return ret; + } + + dev_dbg(priv->dev, "pinctrl probed ok\n"); + + return 0; +} + +static struct platform_driver madera_pin_driver = { + .probe = madera_pin_probe, + .driver = { + .name = "madera-pinctrl", + }, +}; + +module_platform_driver(madera_pin_driver); + +MODULE_DESCRIPTION("Madera pinctrl driver"); +MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); +MODULE_LICENSE("GPL v2"); |