diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/pinctrl/Makefile | 2 | ||||
| -rw-r--r-- | drivers/pinctrl/mvebu/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/pinctrl/mvebu/Makefile | 3 | ||||
| -rw-r--r-- | drivers/pinctrl/mvebu/pinctrl-armada-37xx.c | 648 |
4 files changed, 658 insertions, 2 deletions
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 5fc3c1ddd86f..0e9b2226a7c2 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -45,7 +45,7 @@ obj-y += bcm/ obj-$(CONFIG_PINCTRL_BERLIN) += berlin/ obj-y += freescale/ obj-$(CONFIG_X86) += intel/ -obj-$(CONFIG_PINCTRL_MVEBU) += mvebu/ +obj-y += mvebu/ obj-y += nomadik/ obj-$(CONFIG_PINCTRL_PXA) += pxa/ obj-$(CONFIG_ARCH_QCOM) += qcom/ diff --git a/drivers/pinctrl/mvebu/Kconfig b/drivers/pinctrl/mvebu/Kconfig index 170602407c0d..5bade32d3089 100644 --- a/drivers/pinctrl/mvebu/Kconfig +++ b/drivers/pinctrl/mvebu/Kconfig @@ -39,3 +39,10 @@ config PINCTRL_ORION select PINCTRL_MVEBU endif + +config PINCTRL_ARMADA_37XX + bool + select GENERIC_PINCONF + select MFD_SYSCON + select PINCONF + select PINMUX diff --git a/drivers/pinctrl/mvebu/Makefile b/drivers/pinctrl/mvebu/Makefile index 18270cd5ea43..60c245a60f39 100644 --- a/drivers/pinctrl/mvebu/Makefile +++ b/drivers/pinctrl/mvebu/Makefile @@ -1,4 +1,4 @@ -obj-y += pinctrl-mvebu.o +obj-$(CONFIG_PINCTRL_MVEBU) += pinctrl-mvebu.o obj-$(CONFIG_PINCTRL_DOVE) += pinctrl-dove.o obj-$(CONFIG_PINCTRL_KIRKWOOD) += pinctrl-kirkwood.o obj-$(CONFIG_PINCTRL_ARMADA_370) += pinctrl-armada-370.o @@ -6,4 +6,5 @@ obj-$(CONFIG_PINCTRL_ARMADA_375) += pinctrl-armada-375.o obj-$(CONFIG_PINCTRL_ARMADA_38X) += pinctrl-armada-38x.o obj-$(CONFIG_PINCTRL_ARMADA_39X) += pinctrl-armada-39x.o obj-$(CONFIG_PINCTRL_ARMADA_XP) += pinctrl-armada-xp.o +obj-$(CONFIG_PINCTRL_ARMADA_37XX) += pinctrl-armada-37xx.o obj-$(CONFIG_PINCTRL_ORION) += pinctrl-orion.o diff --git a/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c new file mode 100644 index 000000000000..8b769d77db22 --- /dev/null +++ b/drivers/pinctrl/mvebu/pinctrl-armada-37xx.c @@ -0,0 +1,648 @@ +/* + * Marvell 37xx SoC pinctrl driver + * + * Copyright (C) 2017 Marvell + * + * Gregory CLEMENT <gregory.clement@free-electrons.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2 or later. This program is licensed "as is" + * without any warranty of any kind, whether express or implied. + */ + +#include <linux/mfd/syscon.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/pinctrl/pinconf-generic.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> +#include <linux/slab.h> + +#include "../pinctrl-utils.h" + +#define OUTPUT_EN 0x0 +#define OUTPUT_CTL 0x20 +#define SELECTION 0x30 + +#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 { + struct regmap *regmap; + const struct armada_37xx_pin_data *data; + struct device *dev; + struct pinctrl_desc pctl; + 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 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 struct armada_37xx_pin_group *armada_37xx_find_next_grp_by_pin( + struct armada_37xx_pinctrl *info, int pin, int *grp) +{ + while (*grp < info->ngroups) { + struct armada_37xx_pin_group *group = &info->groups[*grp]; + int j; + + *grp = *grp + 1; + for (j = 0; j < (group->npins + group->extra_npins); j++) + if (group->pins[j] == pin) + return group; + } + return NULL; +} + +static int armada_37xx_pin_config_group_get(struct pinctrl_dev *pctldev, + unsigned int selector, unsigned long *config) +{ + return -ENOTSUPP; +} + +static int armada_37xx_pin_config_group_set(struct pinctrl_dev *pctldev, + unsigned int selector, unsigned long *configs, + unsigned int num_configs) +{ + return -ENOTSUPP; +} + +static struct pinconf_ops armada_37xx_pinconf_ops = { + .is_generic = true, + .pin_config_group_get = armada_37xx_pin_config_group_get, + .pin_config_group_set = armada_37xx_pin_config_group_set, +}; + +static int armada_37xx_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->ngroups; +} + +static const char *armada_37xx_get_group_name(struct pinctrl_dev *pctldev, + unsigned int group) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->groups[group].name; +} + +static int armada_37xx_get_group_pins(struct pinctrl_dev *pctldev, + unsigned int selector, + const unsigned int **pins, + unsigned int *npins) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + if (selector >= info->ngroups) + return -EINVAL; + + *pins = info->groups[selector].pins; + *npins = info->groups[selector].npins + + info->groups[selector].extra_npins; + + return 0; +} + +static const struct pinctrl_ops armada_37xx_pctrl_ops = { + .get_groups_count = armada_37xx_get_groups_count, + .get_group_name = armada_37xx_get_group_name, + .get_group_pins = armada_37xx_get_group_pins, + .dt_node_to_map = pinconf_generic_dt_node_to_map_group, + .dt_free_map = pinctrl_utils_free_map, +}; + +/* + * Pinmux_ops handling + */ + +static int armada_37xx_pmx_get_funcs_count(struct pinctrl_dev *pctldev) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->nfuncs; +} + +static const char *armada_37xx_pmx_get_func_name(struct pinctrl_dev *pctldev, + unsigned int selector) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + return info->funcs[selector].name; +} + +static int armada_37xx_pmx_get_groups(struct pinctrl_dev *pctldev, + unsigned int selector, + const char * const **groups, + unsigned int * const num_groups) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + *groups = info->funcs[selector].groups; + *num_groups = info->funcs[selector].ngroups; + + return 0; +} + +static int armada_37xx_pmx_set_by_name(struct pinctrl_dev *pctldev, + const char *name, + struct armada_37xx_pin_group *grp) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + 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]; + + regmap_update_bits(info->regmap, reg, mask, val); + + return 0; +} + +static int armada_37xx_pmx_set(struct pinctrl_dev *pctldev, + unsigned int selector, + unsigned int group) +{ + + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct armada_37xx_pin_group *grp = &info->groups[group]; + const char *name = info->funcs[selector].name; + + return armada_37xx_pmx_set_by_name(pctldev, name, grp); +} + +static int armada_37xx_pmx_direction_input(struct armada_37xx_pinctrl *info, + unsigned int offset) +{ + unsigned int reg = OUTPUT_EN; + unsigned int mask; + + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + reg += sizeof(u32); + } + mask = BIT(offset); + + return regmap_update_bits(info->regmap, reg, mask, 0); +} + +static int armada_37xx_pmx_direction_output(struct armada_37xx_pinctrl *info, + unsigned int offset, int value) +{ + unsigned int reg = OUTPUT_EN; + unsigned int mask; + + if (offset >= GPIO_PER_REG) { + offset -= GPIO_PER_REG; + reg += sizeof(u32); + } + mask = BIT(offset); + + return regmap_update_bits(info->regmap, reg, mask, mask); +} + +static int armada_37xx_pmx_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset, bool input) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + + dev_dbg(info->dev, "gpio_direction for pin %u as %s-%d to %s\n", + offset, range->name, offset, input ? "input" : "output"); + + if (input) + armada_37xx_pmx_direction_input(info, offset); + else + armada_37xx_pmx_direction_output(info, offset, 0); + + return 0; +} + +static int armada_37xx_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct armada_37xx_pinctrl *info = pinctrl_dev_get_drvdata(pctldev); + struct armada_37xx_pin_group *group; + int grp = 0; + + dev_dbg(info->dev, "requesting gpio %d\n", offset); + + while ((group = armada_37xx_find_next_grp_by_pin(info, offset, &grp))) + armada_37xx_pmx_set_by_name(pctldev, "gpio", group); + + return 0; +} + +static const struct pinmux_ops armada_37xx_pmx_ops = { + .get_functions_count = armada_37xx_pmx_get_funcs_count, + .get_function_name = armada_37xx_pmx_get_func_name, + .get_function_groups = armada_37xx_pmx_get_groups, + .set_mux = armada_37xx_pmx_set, + .gpio_request_enable = armada_37xx_gpio_request_enable, + .gpio_set_direction = armada_37xx_pmx_gpio_set_direction, +}; + +/** + * 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_pinctrl_register(struct platform_device *pdev, + struct armada_37xx_pinctrl *info) +{ + const struct armada_37xx_pin_data *pin_data = info->data; + struct pinctrl_desc *ctrldesc = &info->pctl; + struct pinctrl_pin_desc *pindesc, *pdesc; + int pin, ret; + + info->groups = pin_data->groups; + info->ngroups = pin_data->ngroups; + + ctrldesc->name = "armada_37xx-pinctrl"; + ctrldesc->owner = THIS_MODULE; + ctrldesc->pctlops = &armada_37xx_pctrl_ops; + ctrldesc->pmxops = &armada_37xx_pmx_ops; + ctrldesc->confops = &armada_37xx_pinconf_ops; + + pindesc = devm_kzalloc(&pdev->dev, sizeof(*pindesc) * + pin_data->nr_pins, GFP_KERNEL); + if (!pindesc) + return -ENOMEM; + + ctrldesc->pins = pindesc; + ctrldesc->npins = pin_data->nr_pins; + + pdesc = pindesc; + for (pin = 0; pin < pin_data->nr_pins; pin++) { + pdesc->number = pin; + pdesc->name = kasprintf(GFP_KERNEL, "%s-%d", + pin_data->name, pin); + pdesc++; + } + + /* + * we allocate functions for number of pins and hope there are + * fewer unique functions than pins available + */ + info->funcs = devm_kzalloc(&pdev->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; + + info->pctl_dev = devm_pinctrl_register(&pdev->dev, ctrldesc, info); + if (IS_ERR(info->pctl_dev)) { + dev_err(&pdev->dev, "could not register pinctrl driver\n"); + return PTR_ERR(info->pctl_dev); + } + + return 0; +} + +static const struct of_device_id armada_37xx_pinctrl_of_match[] = { + { + .compatible = "marvell,armada3710-sb-pinctrl", + .data = (void *)&armada_37xx_pin_sb, + }, + { + .compatible = "marvell,armada3710-nb-pinctrl", + .data = (void *)&armada_37xx_pin_nb, + }, + { }, +}; + +static int __init armada_37xx_pinctrl_probe(struct platform_device *pdev) +{ + struct armada_37xx_pinctrl *info; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct regmap *regmap; + int ret; + + info = devm_kzalloc(dev, sizeof(struct armada_37xx_pinctrl), + GFP_KERNEL); + if (!info) + return -ENOMEM; + + info->dev = dev; + + regmap = syscon_node_to_regmap(np); + if (IS_ERR(regmap)) { + dev_err(&pdev->dev, "cannot get regmap\n"); + return PTR_ERR(regmap); + } + info->regmap = regmap; + + info->data = of_device_get_match_data(dev); + + ret = armada_37xx_pinctrl_register(pdev, info); + if (ret) + return ret; + + platform_set_drvdata(pdev, info); + + return 0; +} + +static struct platform_driver armada_37xx_pinctrl_driver = { + .driver = { + .name = "armada-37xx-pinctrl", + .of_match_table = armada_37xx_pinctrl_of_match, + }, +}; + +builtin_platform_driver_probe(armada_37xx_pinctrl_driver, + armada_37xx_pinctrl_probe); |