299 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (C) 2018 Rafał Miłecki <rafal@milecki.pl>4 */5 6#include <linux/err.h>7#include <linux/io.h>8#include <linux/module.h>9#include <linux/of.h>10#include <linux/pinctrl/pinconf-generic.h>11#include <linux/pinctrl/pinctrl.h>12#include <linux/pinctrl/pinmux.h>13#include <linux/platform_device.h>14#include <linux/property.h>15#include <linux/slab.h>16 17#include "../core.h"18#include "../pinmux.h"19 20#define FLAG_BCM4708 BIT(1)21#define FLAG_BCM4709 BIT(2)22#define FLAG_BCM53012 BIT(3)23 24struct ns_pinctrl {25 struct device *dev;26 unsigned int chipset_flag;27 struct pinctrl_dev *pctldev;28 void __iomem *base;29 30 struct pinctrl_desc pctldesc;31};32 33/*34 * Pins35 */36 37static const struct pinctrl_pin_desc ns_pinctrl_pins[] = {38 { 0, "spi_clk", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },39 { 1, "spi_ss", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },40 { 2, "spi_mosi", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },41 { 3, "spi_miso", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },42 { 4, "i2c_scl", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },43 { 5, "i2c_sda", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },44 { 6, "mdc", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },45 { 7, "mdio", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },46 { 8, "pwm0", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },47 { 9, "pwm1", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },48 { 10, "pwm2", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },49 { 11, "pwm3", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },50 { 12, "uart1_rx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },51 { 13, "uart1_tx", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },52 { 14, "uart1_cts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },53 { 15, "uart1_rts", (void *)(FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012) },54 { 16, "uart2_rx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },55 { 17, "uart2_tx", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },56/* TODO { ??, "xtal_out", (void *)(FLAG_BCM4709) }, */57 { 22, "sdio_pwr", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },58 { 23, "sdio_en_1p8v", (void *)(FLAG_BCM4709 | FLAG_BCM53012) },59};60 61/*62 * Groups63 */64 65struct ns_pinctrl_group {66 const char *name;67 unsigned int *pins;68 const unsigned int num_pins;69 unsigned int chipsets;70};71 72static unsigned int spi_pins[] = { 0, 1, 2, 3 };73static unsigned int i2c_pins[] = { 4, 5 };74static unsigned int mdio_pins[] = { 6, 7 };75static unsigned int pwm0_pins[] = { 8 };76static unsigned int pwm1_pins[] = { 9 };77static unsigned int pwm2_pins[] = { 10 };78static unsigned int pwm3_pins[] = { 11 };79static unsigned int uart1_pins[] = { 12, 13, 14, 15 };80static unsigned int uart2_pins[] = { 16, 17 };81static unsigned int sdio_pwr_pins[] = { 22 };82static unsigned int sdio_1p8v_pins[] = { 23 };83 84#define NS_GROUP(_name, _pins, _chipsets) \85{ \86 .name = _name, \87 .pins = _pins, \88 .num_pins = ARRAY_SIZE(_pins), \89 .chipsets = _chipsets, \90}91 92static const struct ns_pinctrl_group ns_pinctrl_groups[] = {93 NS_GROUP("spi_grp", spi_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),94 NS_GROUP("i2c_grp", i2c_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),95 NS_GROUP("mdio_grp", mdio_pins, FLAG_BCM4709 | FLAG_BCM53012),96 NS_GROUP("pwm0_grp", pwm0_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),97 NS_GROUP("pwm1_grp", pwm1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),98 NS_GROUP("pwm2_grp", pwm2_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),99 NS_GROUP("pwm3_grp", pwm3_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),100 NS_GROUP("uart1_grp", uart1_pins, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),101 NS_GROUP("uart2_grp", uart2_pins, FLAG_BCM4709 | FLAG_BCM53012),102 NS_GROUP("sdio_pwr_grp", sdio_pwr_pins, FLAG_BCM4709 | FLAG_BCM53012),103 NS_GROUP("sdio_1p8v_grp", sdio_1p8v_pins, FLAG_BCM4709 | FLAG_BCM53012),104};105 106/*107 * Functions108 */109 110struct ns_pinctrl_function {111 const char *name;112 const char * const *groups;113 const unsigned int num_groups;114 unsigned int chipsets;115};116 117static const char * const spi_groups[] = { "spi_grp" };118static const char * const i2c_groups[] = { "i2c_grp" };119static const char * const mdio_groups[] = { "mdio_grp" };120static const char * const pwm_groups[] = { "pwm0_grp", "pwm1_grp", "pwm2_grp",121 "pwm3_grp" };122static const char * const uart1_groups[] = { "uart1_grp" };123static const char * const uart2_groups[] = { "uart2_grp" };124static const char * const sdio_groups[] = { "sdio_pwr_grp", "sdio_1p8v_grp" };125 126#define NS_FUNCTION(_name, _groups, _chipsets) \127{ \128 .name = _name, \129 .groups = _groups, \130 .num_groups = ARRAY_SIZE(_groups), \131 .chipsets = _chipsets, \132}133 134static const struct ns_pinctrl_function ns_pinctrl_functions[] = {135 NS_FUNCTION("spi", spi_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),136 NS_FUNCTION("i2c", i2c_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),137 NS_FUNCTION("mdio", mdio_groups, FLAG_BCM4709 | FLAG_BCM53012),138 NS_FUNCTION("pwm", pwm_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),139 NS_FUNCTION("uart1", uart1_groups, FLAG_BCM4708 | FLAG_BCM4709 | FLAG_BCM53012),140 NS_FUNCTION("uart2", uart2_groups, FLAG_BCM4709 | FLAG_BCM53012),141 NS_FUNCTION("sdio", sdio_groups, FLAG_BCM4709 | FLAG_BCM53012),142};143 144/*145 * Groups code146 */147 148static const struct pinctrl_ops ns_pinctrl_ops = {149 .get_groups_count = pinctrl_generic_get_group_count,150 .get_group_name = pinctrl_generic_get_group_name,151 .get_group_pins = pinctrl_generic_get_group_pins,152 .dt_node_to_map = pinconf_generic_dt_node_to_map_group,153 .dt_free_map = pinconf_generic_dt_free_map,154};155 156/*157 * Functions code158 */159 160static int ns_pinctrl_set_mux(struct pinctrl_dev *pctrl_dev,161 unsigned int func_select,162 unsigned int group_selector)163{164 struct ns_pinctrl *ns_pinctrl = pinctrl_dev_get_drvdata(pctrl_dev);165 struct group_desc *group;166 u32 unset = 0;167 u32 tmp;168 int i;169 170 group = pinctrl_generic_get_group(pctrl_dev, group_selector);171 if (!group)172 return -EINVAL;173 174 for (i = 0; i < group->grp.npins; i++)175 unset |= BIT(group->grp.pins[i]);176 177 tmp = readl(ns_pinctrl->base);178 tmp &= ~unset;179 writel(tmp, ns_pinctrl->base);180 181 return 0;182}183 184static const struct pinmux_ops ns_pinctrl_pmxops = {185 .get_functions_count = pinmux_generic_get_function_count,186 .get_function_name = pinmux_generic_get_function_name,187 .get_function_groups = pinmux_generic_get_function_groups,188 .set_mux = ns_pinctrl_set_mux,189};190 191/*192 * Controller code193 */194 195static struct pinctrl_desc ns_pinctrl_desc = {196 .name = "pinctrl-ns",197 .pctlops = &ns_pinctrl_ops,198 .pmxops = &ns_pinctrl_pmxops,199};200 201static const struct of_device_id ns_pinctrl_of_match_table[] = {202 { .compatible = "brcm,bcm4708-pinmux", .data = (void *)FLAG_BCM4708, },203 { .compatible = "brcm,bcm4709-pinmux", .data = (void *)FLAG_BCM4709, },204 { .compatible = "brcm,bcm53012-pinmux", .data = (void *)FLAG_BCM53012, },205 { }206};207 208static int ns_pinctrl_probe(struct platform_device *pdev)209{210 struct device *dev = &pdev->dev;211 struct ns_pinctrl *ns_pinctrl;212 struct pinctrl_desc *pctldesc;213 struct pinctrl_pin_desc *pin;214 struct resource *res;215 int i;216 217 ns_pinctrl = devm_kzalloc(dev, sizeof(*ns_pinctrl), GFP_KERNEL);218 if (!ns_pinctrl)219 return -ENOMEM;220 pctldesc = &ns_pinctrl->pctldesc;221 platform_set_drvdata(pdev, ns_pinctrl);222 223 /* Set basic properties */224 225 ns_pinctrl->dev = dev;226 227 ns_pinctrl->chipset_flag = (uintptr_t)device_get_match_data(dev);228 229 res = platform_get_resource_byname(pdev, IORESOURCE_MEM,230 "cru_gpio_control");231 ns_pinctrl->base = devm_ioremap_resource(dev, res);232 if (IS_ERR(ns_pinctrl->base))233 return PTR_ERR(ns_pinctrl->base);234 235 memcpy(pctldesc, &ns_pinctrl_desc, sizeof(*pctldesc));236 237 /* Set pinctrl properties */238 239 pctldesc->pins = devm_kcalloc(dev, ARRAY_SIZE(ns_pinctrl_pins),240 sizeof(struct pinctrl_pin_desc),241 GFP_KERNEL);242 if (!pctldesc->pins)243 return -ENOMEM;244 for (i = 0, pin = (struct pinctrl_pin_desc *)&pctldesc->pins[0];245 i < ARRAY_SIZE(ns_pinctrl_pins); i++) {246 const struct pinctrl_pin_desc *src = &ns_pinctrl_pins[i];247 unsigned int chipsets = (uintptr_t)src->drv_data;248 249 if (chipsets & ns_pinctrl->chipset_flag) {250 memcpy(pin++, src, sizeof(*src));251 pctldesc->npins++;252 }253 }254 255 /* Register */256 257 ns_pinctrl->pctldev = devm_pinctrl_register(dev, pctldesc, ns_pinctrl);258 if (IS_ERR(ns_pinctrl->pctldev)) {259 dev_err(dev, "Failed to register pinctrl\n");260 return PTR_ERR(ns_pinctrl->pctldev);261 }262 263 for (i = 0; i < ARRAY_SIZE(ns_pinctrl_groups); i++) {264 const struct ns_pinctrl_group *group = &ns_pinctrl_groups[i];265 266 if (!(group->chipsets & ns_pinctrl->chipset_flag))267 continue;268 269 pinctrl_generic_add_group(ns_pinctrl->pctldev, group->name,270 group->pins, group->num_pins, NULL);271 }272 273 for (i = 0; i < ARRAY_SIZE(ns_pinctrl_functions); i++) {274 const struct ns_pinctrl_function *function = &ns_pinctrl_functions[i];275 276 if (!(function->chipsets & ns_pinctrl->chipset_flag))277 continue;278 279 pinmux_generic_add_function(ns_pinctrl->pctldev, function->name,280 function->groups,281 function->num_groups, NULL);282 }283 284 return 0;285}286 287static struct platform_driver ns_pinctrl_driver = {288 .probe = ns_pinctrl_probe,289 .driver = {290 .name = "ns-pinmux",291 .of_match_table = ns_pinctrl_of_match_table,292 },293};294 295module_platform_driver(ns_pinctrl_driver);296 297MODULE_AUTHOR("Rafał Miłecki");298MODULE_DEVICE_TABLE(of, ns_pinctrl_of_match_table);299