| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Author: zhanghongchen <zhanghongchen@loongson.cn> |
| * Yinbo Zhu <zhuyinbo@loongson.cn> |
| * Copyright (C) 2022-2023 Loongson Technology Corporation Limited |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/mod_devicetable.h> |
| #include <linux/pinctrl/pinmux.h> |
| #include <linux/pinctrl/pinconf-generic.h> |
| #include <linux/pinctrl/pinctrl.h> |
| #include <linux/bitops.h> |
| #include <linux/io.h> |
| #include <linux/seq_file.h> |
| |
| #include "core.h" |
| #include "pinctrl-utils.h" |
| |
| #define PMX_GROUP(name, offset, bitv) \ |
| { \ |
| .grp = PINCTRL_PINGROUP((#name), (name ## _pins), \ |
| ARRAY_SIZE((name ## _pins))), \ |
| .reg = offset, \ |
| .bit = bitv, \ |
| } |
| |
| #define SPECIFIC_GROUP(group) \ |
| static const char * const group##_groups[] = { \ |
| #group \ |
| } |
| |
| #define FUNCTION(fn) \ |
| { \ |
| .name = #fn, \ |
| .groups = fn ## _groups, \ |
| .num_groups = ARRAY_SIZE(fn ## _groups), \ |
| } |
| |
| struct loongson2_pinctrl { |
| struct device *dev; |
| struct pinctrl_dev *pcdev; |
| struct pinctrl_desc desc; |
| struct device_node *of_node; |
| spinlock_t lock; |
| void __iomem *reg_base; |
| }; |
| |
| struct loongson2_pmx_group { |
| struct pingroup grp; |
| unsigned int reg; |
| unsigned int bit; |
| }; |
| |
| struct loongson2_pmx_func { |
| const char *name; |
| const char * const *groups; |
| unsigned int num_groups; |
| }; |
| |
| #define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x) |
| static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = { |
| LOONGSON2_PIN(0), LOONGSON2_PIN(1), LOONGSON2_PIN(2), LOONGSON2_PIN(3), |
| LOONGSON2_PIN(4), LOONGSON2_PIN(5), LOONGSON2_PIN(6), LOONGSON2_PIN(7), |
| LOONGSON2_PIN(8), LOONGSON2_PIN(9), LOONGSON2_PIN(10), LOONGSON2_PIN(11), |
| LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14), |
| LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19), |
| LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23), |
| LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27), |
| LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30), |
| LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35), |
| LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39), |
| LOONGSON2_PIN(40), LOONGSON2_PIN(41), |
| LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47), |
| LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51), |
| LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55), |
| LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59), |
| LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63), |
| }; |
| |
| static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, |
| 8, 9, 10, 11, 12, 13, 14, |
| 16, 17, 18, 19, 20, 21, 22, 23, |
| 24, 25, 26, 27, 28, 29, 30, |
| 32, 33, 34, 35, 36, 37, 38, 39, |
| 40, 43, 44, 45, 46, 47, |
| 48, 49, 50, 51, 52, 53, 46, 55, |
| 56, 57, 58, 59, 60, 61, 62, 63}; |
| static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41}; |
| static const unsigned int can1_pins[] = {34, 35}; |
| static const unsigned int can0_pins[] = {32, 33}; |
| static const unsigned int pwm3_pins[] = {23}; |
| static const unsigned int pwm2_pins[] = {22}; |
| static const unsigned int pwm1_pins[] = {21}; |
| static const unsigned int pwm0_pins[] = {20}; |
| static const unsigned int i2c1_pins[] = {18, 19}; |
| static const unsigned int i2c0_pins[] = {16, 17}; |
| static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51, |
| 52, 53, 54, 55, 56, 57, 58, 59, 60, |
| 61, 62, 63}; |
| static const unsigned int sata_led_pins[] = {14}; |
| static const unsigned int i2s_pins[] = {24, 25, 26, 27, 28}; |
| static const unsigned int hda_pins[] = {24, 25, 26, 27, 28, 29, 30}; |
| |
| static struct loongson2_pmx_group loongson2_pmx_groups[] = { |
| PMX_GROUP(gpio, 0x0, 64), |
| PMX_GROUP(sdio, 0x0, 20), |
| PMX_GROUP(can1, 0x0, 17), |
| PMX_GROUP(can0, 0x0, 16), |
| PMX_GROUP(pwm3, 0x0, 15), |
| PMX_GROUP(pwm2, 0x0, 14), |
| PMX_GROUP(pwm1, 0x0, 13), |
| PMX_GROUP(pwm0, 0x0, 12), |
| PMX_GROUP(i2c1, 0x0, 11), |
| PMX_GROUP(i2c0, 0x0, 10), |
| PMX_GROUP(nand, 0x0, 9), |
| PMX_GROUP(sata_led, 0x0, 8), |
| PMX_GROUP(i2s, 0x0, 6), |
| PMX_GROUP(hda, 0x0, 4), |
| }; |
| |
| SPECIFIC_GROUP(sdio); |
| SPECIFIC_GROUP(can1); |
| SPECIFIC_GROUP(can0); |
| SPECIFIC_GROUP(pwm3); |
| SPECIFIC_GROUP(pwm2); |
| SPECIFIC_GROUP(pwm1); |
| SPECIFIC_GROUP(pwm0); |
| SPECIFIC_GROUP(i2c1); |
| SPECIFIC_GROUP(i2c0); |
| SPECIFIC_GROUP(nand); |
| SPECIFIC_GROUP(sata_led); |
| SPECIFIC_GROUP(i2s); |
| SPECIFIC_GROUP(hda); |
| |
| static const char * const gpio_groups[] = { |
| "sdio", |
| "can1", "can0", |
| "pwm3", "pwm2", "pwm1", "pwm0", |
| "i2c1", "i2c0", |
| "nand", |
| "sata_led", |
| "i2s", |
| "hda", |
| }; |
| |
| static const struct loongson2_pmx_func loongson2_pmx_functions[] = { |
| FUNCTION(gpio), |
| FUNCTION(sdio), |
| FUNCTION(can1), |
| FUNCTION(can0), |
| FUNCTION(pwm3), |
| FUNCTION(pwm2), |
| FUNCTION(pwm1), |
| FUNCTION(pwm0), |
| FUNCTION(i2c1), |
| FUNCTION(i2c0), |
| FUNCTION(nand), |
| FUNCTION(sata_led), |
| FUNCTION(i2s), |
| FUNCTION(hda), |
| }; |
| |
| static int loongson2_get_groups_count(struct pinctrl_dev *pcdev) |
| { |
| return ARRAY_SIZE(loongson2_pmx_groups); |
| } |
| |
| static const char *loongson2_get_group_name(struct pinctrl_dev *pcdev, |
| unsigned int selector) |
| { |
| return loongson2_pmx_groups[selector].grp.name; |
| } |
| |
| static int loongson2_get_group_pins(struct pinctrl_dev *pcdev, unsigned int selector, |
| const unsigned int **pins, unsigned int *num_pins) |
| { |
| *pins = loongson2_pmx_groups[selector].grp.pins; |
| *num_pins = loongson2_pmx_groups[selector].grp.npins; |
| |
| return 0; |
| } |
| |
| static void loongson2_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s, |
| unsigned int offset) |
| { |
| seq_printf(s, " %s", dev_name(pcdev->dev)); |
| } |
| |
| static const struct pinctrl_ops loongson2_pctrl_ops = { |
| .get_groups_count = loongson2_get_groups_count, |
| .get_group_name = loongson2_get_group_name, |
| .get_group_pins = loongson2_get_group_pins, |
| .dt_node_to_map = pinconf_generic_dt_node_to_map_all, |
| .dt_free_map = pinctrl_utils_free_map, |
| .pin_dbg_show = loongson2_pin_dbg_show, |
| }; |
| |
| static int loongson2_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned int func_num, |
| unsigned int group_num) |
| { |
| struct loongson2_pinctrl *pctrl = pinctrl_dev_get_drvdata(pcdev); |
| void __iomem *reg = pctrl->reg_base + |
| loongson2_pmx_groups[group_num].reg; |
| unsigned int mux_bit = loongson2_pmx_groups[group_num].bit; |
| unsigned int val; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&pctrl->lock, flags); |
| val = readl(reg); |
| if (func_num == 0) |
| val &= ~BIT(mux_bit); |
| else |
| val |= BIT(mux_bit); |
| writel(val, reg); |
| spin_unlock_irqrestore(&pctrl->lock, flags); |
| |
| return 0; |
| } |
| |
| static int loongson2_pmx_get_funcs_count(struct pinctrl_dev *pcdev) |
| { |
| return ARRAY_SIZE(loongson2_pmx_functions); |
| } |
| |
| static const char *loongson2_pmx_get_func_name(struct pinctrl_dev *pcdev, |
| unsigned int selector) |
| { |
| return loongson2_pmx_functions[selector].name; |
| } |
| |
| static int loongson2_pmx_get_groups(struct pinctrl_dev *pcdev, |
| unsigned int selector, |
| const char * const **groups, |
| unsigned int * const num_groups) |
| { |
| *groups = loongson2_pmx_functions[selector].groups; |
| *num_groups = loongson2_pmx_functions[selector].num_groups; |
| |
| return 0; |
| } |
| |
| static const struct pinmux_ops loongson2_pmx_ops = { |
| .set_mux = loongson2_pmx_set_mux, |
| .get_functions_count = loongson2_pmx_get_funcs_count, |
| .get_function_name = loongson2_pmx_get_func_name, |
| .get_function_groups = loongson2_pmx_get_groups, |
| }; |
| |
| static int loongson2_pinctrl_probe(struct platform_device *pdev) |
| { |
| struct device *dev = &pdev->dev; |
| struct loongson2_pinctrl *pctrl; |
| |
| pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); |
| if (!pctrl) |
| return -ENOMEM; |
| |
| pctrl->reg_base = devm_platform_ioremap_resource(pdev, 0); |
| if (IS_ERR(pctrl->reg_base)) |
| return PTR_ERR(pctrl->reg_base); |
| |
| spin_lock_init(&pctrl->lock); |
| |
| pctrl->dev = dev; |
| pctrl->desc.name = "pinctrl-loongson2"; |
| pctrl->desc.owner = THIS_MODULE; |
| pctrl->desc.pctlops = &loongson2_pctrl_ops; |
| pctrl->desc.pmxops = &loongson2_pmx_ops; |
| pctrl->desc.pins = loongson2_pctrl_pins; |
| pctrl->desc.npins = ARRAY_SIZE(loongson2_pctrl_pins); |
| |
| pctrl->pcdev = devm_pinctrl_register(pctrl->dev, &pctrl->desc, pctrl); |
| if (IS_ERR(pctrl->pcdev)) |
| return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->pcdev), |
| "can't register pinctrl device"); |
| |
| return 0; |
| } |
| |
| static const struct of_device_id loongson2_pinctrl_dt_match[] = { |
| { |
| .compatible = "loongson,ls2k-pinctrl", |
| }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, loongson2_pinctrl_dt_match); |
| |
| static struct platform_driver loongson2_pinctrl_driver = { |
| .probe = loongson2_pinctrl_probe, |
| .driver = { |
| .name = "loongson2-pinctrl", |
| .of_match_table = loongson2_pinctrl_dt_match, |
| }, |
| }; |
| |
| static int __init loongson2_pinctrl_init(void) |
| { |
| return platform_driver_register(&loongson2_pinctrl_driver); |
| } |
| arch_initcall(loongson2_pinctrl_init); |
| |
| static void __exit loongson2_pinctrl_exit(void) |
| { |
| platform_driver_unregister(&loongson2_pinctrl_driver); |
| } |
| module_exit(loongson2_pinctrl_exit); |
| |
| MODULE_DESCRIPTION("Loongson2 Pinctrl driver"); |
| MODULE_LICENSE("GPL"); |
