1*f73f88acSzhanghongchen // SPDX-License-Identifier: GPL-2.0+ 2*f73f88acSzhanghongchen /* 3*f73f88acSzhanghongchen * Author: zhanghongchen <zhanghongchen@loongson.cn> 4*f73f88acSzhanghongchen * Yinbo Zhu <zhuyinbo@loongson.cn> 5*f73f88acSzhanghongchen * Copyright (C) 2022-2023 Loongson Technology Corporation Limited 6*f73f88acSzhanghongchen */ 7*f73f88acSzhanghongchen 8*f73f88acSzhanghongchen #include <linux/init.h> 9*f73f88acSzhanghongchen #include <linux/module.h> 10*f73f88acSzhanghongchen #include <linux/platform_device.h> 11*f73f88acSzhanghongchen #include <linux/mod_devicetable.h> 12*f73f88acSzhanghongchen #include <linux/pinctrl/pinmux.h> 13*f73f88acSzhanghongchen #include <linux/pinctrl/pinconf-generic.h> 14*f73f88acSzhanghongchen #include <linux/pinctrl/pinctrl.h> 15*f73f88acSzhanghongchen #include <linux/bitops.h> 16*f73f88acSzhanghongchen #include <linux/io.h> 17*f73f88acSzhanghongchen #include <linux/seq_file.h> 18*f73f88acSzhanghongchen 19*f73f88acSzhanghongchen #include "core.h" 20*f73f88acSzhanghongchen #include "pinctrl-utils.h" 21*f73f88acSzhanghongchen 22*f73f88acSzhanghongchen #define PMX_GROUP(name, offset, bitv) \ 23*f73f88acSzhanghongchen { \ 24*f73f88acSzhanghongchen .grp = PINCTRL_PINGROUP((#name), (name ## _pins), \ 25*f73f88acSzhanghongchen ARRAY_SIZE((name ## _pins))), \ 26*f73f88acSzhanghongchen .reg = offset, \ 27*f73f88acSzhanghongchen .bit = bitv, \ 28*f73f88acSzhanghongchen } 29*f73f88acSzhanghongchen 30*f73f88acSzhanghongchen #define SPECIFIC_GROUP(group) \ 31*f73f88acSzhanghongchen static const char * const group##_groups[] = { \ 32*f73f88acSzhanghongchen #group \ 33*f73f88acSzhanghongchen } 34*f73f88acSzhanghongchen 35*f73f88acSzhanghongchen #define FUNCTION(fn) \ 36*f73f88acSzhanghongchen { \ 37*f73f88acSzhanghongchen .name = #fn, \ 38*f73f88acSzhanghongchen .groups = fn ## _groups, \ 39*f73f88acSzhanghongchen .num_groups = ARRAY_SIZE(fn ## _groups), \ 40*f73f88acSzhanghongchen } 41*f73f88acSzhanghongchen 42*f73f88acSzhanghongchen struct loongson2_pinctrl { 43*f73f88acSzhanghongchen struct device *dev; 44*f73f88acSzhanghongchen struct pinctrl_dev *pcdev; 45*f73f88acSzhanghongchen struct pinctrl_desc desc; 46*f73f88acSzhanghongchen struct device_node *of_node; 47*f73f88acSzhanghongchen spinlock_t lock; 48*f73f88acSzhanghongchen void * __iomem reg_base; 49*f73f88acSzhanghongchen }; 50*f73f88acSzhanghongchen 51*f73f88acSzhanghongchen struct loongson2_pmx_group { 52*f73f88acSzhanghongchen struct pingroup grp; 53*f73f88acSzhanghongchen unsigned int reg; 54*f73f88acSzhanghongchen unsigned int bit; 55*f73f88acSzhanghongchen }; 56*f73f88acSzhanghongchen 57*f73f88acSzhanghongchen struct loongson2_pmx_func { 58*f73f88acSzhanghongchen const char *name; 59*f73f88acSzhanghongchen const char * const *groups; 60*f73f88acSzhanghongchen unsigned int num_groups; 61*f73f88acSzhanghongchen }; 62*f73f88acSzhanghongchen 63*f73f88acSzhanghongchen #define LOONGSON2_PIN(x) PINCTRL_PIN(x, "gpio"#x) 64*f73f88acSzhanghongchen static const struct pinctrl_pin_desc loongson2_pctrl_pins[] = { 65*f73f88acSzhanghongchen LOONGSON2_PIN(0), LOONGSON2_PIN(1), LOONGSON2_PIN(2), LOONGSON2_PIN(3), 66*f73f88acSzhanghongchen LOONGSON2_PIN(4), LOONGSON2_PIN(5), LOONGSON2_PIN(6), LOONGSON2_PIN(7), 67*f73f88acSzhanghongchen LOONGSON2_PIN(8), LOONGSON2_PIN(9), LOONGSON2_PIN(10), LOONGSON2_PIN(11), 68*f73f88acSzhanghongchen LOONGSON2_PIN(12), LOONGSON2_PIN(13), LOONGSON2_PIN(14), 69*f73f88acSzhanghongchen LOONGSON2_PIN(16), LOONGSON2_PIN(17), LOONGSON2_PIN(18), LOONGSON2_PIN(19), 70*f73f88acSzhanghongchen LOONGSON2_PIN(20), LOONGSON2_PIN(21), LOONGSON2_PIN(22), LOONGSON2_PIN(23), 71*f73f88acSzhanghongchen LOONGSON2_PIN(24), LOONGSON2_PIN(25), LOONGSON2_PIN(26), LOONGSON2_PIN(27), 72*f73f88acSzhanghongchen LOONGSON2_PIN(28), LOONGSON2_PIN(29), LOONGSON2_PIN(30), 73*f73f88acSzhanghongchen LOONGSON2_PIN(32), LOONGSON2_PIN(33), LOONGSON2_PIN(34), LOONGSON2_PIN(35), 74*f73f88acSzhanghongchen LOONGSON2_PIN(36), LOONGSON2_PIN(37), LOONGSON2_PIN(38), LOONGSON2_PIN(39), 75*f73f88acSzhanghongchen LOONGSON2_PIN(40), LOONGSON2_PIN(41), 76*f73f88acSzhanghongchen LOONGSON2_PIN(44), LOONGSON2_PIN(45), LOONGSON2_PIN(46), LOONGSON2_PIN(47), 77*f73f88acSzhanghongchen LOONGSON2_PIN(48), LOONGSON2_PIN(49), LOONGSON2_PIN(50), LOONGSON2_PIN(51), 78*f73f88acSzhanghongchen LOONGSON2_PIN(52), LOONGSON2_PIN(53), LOONGSON2_PIN(54), LOONGSON2_PIN(55), 79*f73f88acSzhanghongchen LOONGSON2_PIN(56), LOONGSON2_PIN(57), LOONGSON2_PIN(58), LOONGSON2_PIN(59), 80*f73f88acSzhanghongchen LOONGSON2_PIN(60), LOONGSON2_PIN(61), LOONGSON2_PIN(62), LOONGSON2_PIN(63), 81*f73f88acSzhanghongchen }; 82*f73f88acSzhanghongchen 83*f73f88acSzhanghongchen static const unsigned int gpio_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, 84*f73f88acSzhanghongchen 8, 9, 10, 11, 12, 13, 14, 85*f73f88acSzhanghongchen 16, 17, 18, 19, 20, 21, 22, 23, 86*f73f88acSzhanghongchen 24, 25, 26, 27, 28, 29, 30, 87*f73f88acSzhanghongchen 32, 33, 34, 35, 36, 37, 38, 39, 88*f73f88acSzhanghongchen 40, 43, 44, 45, 46, 47, 89*f73f88acSzhanghongchen 48, 49, 50, 51, 52, 53, 46, 55, 90*f73f88acSzhanghongchen 56, 57, 58, 59, 60, 61, 62, 63}; 91*f73f88acSzhanghongchen static const unsigned int sdio_pins[] = {36, 37, 38, 39, 40, 41}; 92*f73f88acSzhanghongchen static const unsigned int can1_pins[] = {34, 35}; 93*f73f88acSzhanghongchen static const unsigned int can0_pins[] = {32, 33}; 94*f73f88acSzhanghongchen static const unsigned int pwm3_pins[] = {23}; 95*f73f88acSzhanghongchen static const unsigned int pwm2_pins[] = {22}; 96*f73f88acSzhanghongchen static const unsigned int pwm1_pins[] = {21}; 97*f73f88acSzhanghongchen static const unsigned int pwm0_pins[] = {20}; 98*f73f88acSzhanghongchen static const unsigned int i2c1_pins[] = {18, 19}; 99*f73f88acSzhanghongchen static const unsigned int i2c0_pins[] = {16, 17}; 100*f73f88acSzhanghongchen static const unsigned int nand_pins[] = {44, 45, 46, 47, 48, 49, 50, 51, 101*f73f88acSzhanghongchen 52, 53, 54, 55, 56, 57, 58, 59, 60, 102*f73f88acSzhanghongchen 61, 62, 63}; 103*f73f88acSzhanghongchen static const unsigned int sata_led_pins[] = {14}; 104*f73f88acSzhanghongchen static const unsigned int i2s_pins[] = {24, 25, 26, 27, 28}; 105*f73f88acSzhanghongchen static const unsigned int hda_pins[] = {24, 25, 26, 27, 28, 29, 30}; 106*f73f88acSzhanghongchen 107*f73f88acSzhanghongchen static struct loongson2_pmx_group loongson2_pmx_groups[] = { 108*f73f88acSzhanghongchen PMX_GROUP(gpio, 0x0, 64), 109*f73f88acSzhanghongchen PMX_GROUP(sdio, 0x0, 20), 110*f73f88acSzhanghongchen PMX_GROUP(can1, 0x0, 17), 111*f73f88acSzhanghongchen PMX_GROUP(can0, 0x0, 16), 112*f73f88acSzhanghongchen PMX_GROUP(pwm3, 0x0, 15), 113*f73f88acSzhanghongchen PMX_GROUP(pwm2, 0x0, 14), 114*f73f88acSzhanghongchen PMX_GROUP(pwm1, 0x0, 13), 115*f73f88acSzhanghongchen PMX_GROUP(pwm0, 0x0, 12), 116*f73f88acSzhanghongchen PMX_GROUP(i2c1, 0x0, 11), 117*f73f88acSzhanghongchen PMX_GROUP(i2c0, 0x0, 10), 118*f73f88acSzhanghongchen PMX_GROUP(nand, 0x0, 9), 119*f73f88acSzhanghongchen PMX_GROUP(sata_led, 0x0, 8), 120*f73f88acSzhanghongchen PMX_GROUP(i2s, 0x0, 6), 121*f73f88acSzhanghongchen PMX_GROUP(hda, 0x0, 4), 122*f73f88acSzhanghongchen }; 123*f73f88acSzhanghongchen 124*f73f88acSzhanghongchen SPECIFIC_GROUP(sdio); 125*f73f88acSzhanghongchen SPECIFIC_GROUP(can1); 126*f73f88acSzhanghongchen SPECIFIC_GROUP(can0); 127*f73f88acSzhanghongchen SPECIFIC_GROUP(pwm3); 128*f73f88acSzhanghongchen SPECIFIC_GROUP(pwm2); 129*f73f88acSzhanghongchen SPECIFIC_GROUP(pwm1); 130*f73f88acSzhanghongchen SPECIFIC_GROUP(pwm0); 131*f73f88acSzhanghongchen SPECIFIC_GROUP(i2c1); 132*f73f88acSzhanghongchen SPECIFIC_GROUP(i2c0); 133*f73f88acSzhanghongchen SPECIFIC_GROUP(nand); 134*f73f88acSzhanghongchen SPECIFIC_GROUP(sata_led); 135*f73f88acSzhanghongchen SPECIFIC_GROUP(i2s); 136*f73f88acSzhanghongchen SPECIFIC_GROUP(hda); 137*f73f88acSzhanghongchen 138*f73f88acSzhanghongchen static const char * const gpio_groups[] = { 139*f73f88acSzhanghongchen "sdio", 140*f73f88acSzhanghongchen "can1", "can0", 141*f73f88acSzhanghongchen "pwm3", "pwm2", "pwm1", "pwm0", 142*f73f88acSzhanghongchen "i2c1", "i2c0", 143*f73f88acSzhanghongchen "nand", 144*f73f88acSzhanghongchen "sata_led", 145*f73f88acSzhanghongchen "i2s", 146*f73f88acSzhanghongchen "hda", 147*f73f88acSzhanghongchen }; 148*f73f88acSzhanghongchen 149*f73f88acSzhanghongchen static const struct loongson2_pmx_func loongson2_pmx_functions[] = { 150*f73f88acSzhanghongchen FUNCTION(gpio), 151*f73f88acSzhanghongchen FUNCTION(sdio), 152*f73f88acSzhanghongchen FUNCTION(can1), 153*f73f88acSzhanghongchen FUNCTION(can0), 154*f73f88acSzhanghongchen FUNCTION(pwm3), 155*f73f88acSzhanghongchen FUNCTION(pwm2), 156*f73f88acSzhanghongchen FUNCTION(pwm1), 157*f73f88acSzhanghongchen FUNCTION(pwm0), 158*f73f88acSzhanghongchen FUNCTION(i2c1), 159*f73f88acSzhanghongchen FUNCTION(i2c0), 160*f73f88acSzhanghongchen FUNCTION(nand), 161*f73f88acSzhanghongchen FUNCTION(sata_led), 162*f73f88acSzhanghongchen FUNCTION(i2s), 163*f73f88acSzhanghongchen FUNCTION(hda), 164*f73f88acSzhanghongchen }; 165*f73f88acSzhanghongchen 166*f73f88acSzhanghongchen static int loongson2_get_groups_count(struct pinctrl_dev *pcdev) 167*f73f88acSzhanghongchen { 168*f73f88acSzhanghongchen return ARRAY_SIZE(loongson2_pmx_groups); 169*f73f88acSzhanghongchen } 170*f73f88acSzhanghongchen 171*f73f88acSzhanghongchen static const char *loongson2_get_group_name(struct pinctrl_dev *pcdev, 172*f73f88acSzhanghongchen unsigned int selector) 173*f73f88acSzhanghongchen { 174*f73f88acSzhanghongchen return loongson2_pmx_groups[selector].grp.name; 175*f73f88acSzhanghongchen } 176*f73f88acSzhanghongchen 177*f73f88acSzhanghongchen static int loongson2_get_group_pins(struct pinctrl_dev *pcdev, unsigned int selector, 178*f73f88acSzhanghongchen const unsigned int **pins, unsigned int *num_pins) 179*f73f88acSzhanghongchen { 180*f73f88acSzhanghongchen *pins = loongson2_pmx_groups[selector].grp.pins; 181*f73f88acSzhanghongchen *num_pins = loongson2_pmx_groups[selector].grp.npins; 182*f73f88acSzhanghongchen 183*f73f88acSzhanghongchen return 0; 184*f73f88acSzhanghongchen } 185*f73f88acSzhanghongchen 186*f73f88acSzhanghongchen static void loongson2_pin_dbg_show(struct pinctrl_dev *pcdev, struct seq_file *s, 187*f73f88acSzhanghongchen unsigned int offset) 188*f73f88acSzhanghongchen { 189*f73f88acSzhanghongchen seq_printf(s, " %s", dev_name(pcdev->dev)); 190*f73f88acSzhanghongchen } 191*f73f88acSzhanghongchen 192*f73f88acSzhanghongchen static const struct pinctrl_ops loongson2_pctrl_ops = { 193*f73f88acSzhanghongchen .get_groups_count = loongson2_get_groups_count, 194*f73f88acSzhanghongchen .get_group_name = loongson2_get_group_name, 195*f73f88acSzhanghongchen .get_group_pins = loongson2_get_group_pins, 196*f73f88acSzhanghongchen .dt_node_to_map = pinconf_generic_dt_node_to_map_all, 197*f73f88acSzhanghongchen .dt_free_map = pinctrl_utils_free_map, 198*f73f88acSzhanghongchen .pin_dbg_show = loongson2_pin_dbg_show, 199*f73f88acSzhanghongchen }; 200*f73f88acSzhanghongchen 201*f73f88acSzhanghongchen static int loongson2_pmx_set_mux(struct pinctrl_dev *pcdev, unsigned int func_num, 202*f73f88acSzhanghongchen unsigned int group_num) 203*f73f88acSzhanghongchen { 204*f73f88acSzhanghongchen struct loongson2_pinctrl *pctrl = pinctrl_dev_get_drvdata(pcdev); 205*f73f88acSzhanghongchen void * __iomem reg = pctrl->reg_base + 206*f73f88acSzhanghongchen loongson2_pmx_groups[group_num].reg; 207*f73f88acSzhanghongchen unsigned int mux_bit = loongson2_pmx_groups[group_num].bit; 208*f73f88acSzhanghongchen unsigned int val; 209*f73f88acSzhanghongchen unsigned long flags; 210*f73f88acSzhanghongchen 211*f73f88acSzhanghongchen spin_lock_irqsave(&pctrl->lock, flags); 212*f73f88acSzhanghongchen val = readl(reg); 213*f73f88acSzhanghongchen if (func_num == 0) 214*f73f88acSzhanghongchen val &= ~BIT(mux_bit); 215*f73f88acSzhanghongchen else 216*f73f88acSzhanghongchen val |= BIT(mux_bit); 217*f73f88acSzhanghongchen writel(val, reg); 218*f73f88acSzhanghongchen spin_unlock_irqrestore(&pctrl->lock, flags); 219*f73f88acSzhanghongchen 220*f73f88acSzhanghongchen return 0; 221*f73f88acSzhanghongchen } 222*f73f88acSzhanghongchen 223*f73f88acSzhanghongchen static int loongson2_pmx_get_funcs_count(struct pinctrl_dev *pcdev) 224*f73f88acSzhanghongchen { 225*f73f88acSzhanghongchen return ARRAY_SIZE(loongson2_pmx_functions); 226*f73f88acSzhanghongchen } 227*f73f88acSzhanghongchen 228*f73f88acSzhanghongchen static const char *loongson2_pmx_get_func_name(struct pinctrl_dev *pcdev, 229*f73f88acSzhanghongchen unsigned int selector) 230*f73f88acSzhanghongchen { 231*f73f88acSzhanghongchen return loongson2_pmx_functions[selector].name; 232*f73f88acSzhanghongchen } 233*f73f88acSzhanghongchen 234*f73f88acSzhanghongchen static int loongson2_pmx_get_groups(struct pinctrl_dev *pcdev, 235*f73f88acSzhanghongchen unsigned int selector, 236*f73f88acSzhanghongchen const char * const **groups, 237*f73f88acSzhanghongchen unsigned int * const num_groups) 238*f73f88acSzhanghongchen { 239*f73f88acSzhanghongchen *groups = loongson2_pmx_functions[selector].groups; 240*f73f88acSzhanghongchen *num_groups = loongson2_pmx_functions[selector].num_groups; 241*f73f88acSzhanghongchen 242*f73f88acSzhanghongchen return 0; 243*f73f88acSzhanghongchen } 244*f73f88acSzhanghongchen 245*f73f88acSzhanghongchen static const struct pinmux_ops loongson2_pmx_ops = { 246*f73f88acSzhanghongchen .set_mux = loongson2_pmx_set_mux, 247*f73f88acSzhanghongchen .get_functions_count = loongson2_pmx_get_funcs_count, 248*f73f88acSzhanghongchen .get_function_name = loongson2_pmx_get_func_name, 249*f73f88acSzhanghongchen .get_function_groups = loongson2_pmx_get_groups, 250*f73f88acSzhanghongchen }; 251*f73f88acSzhanghongchen 252*f73f88acSzhanghongchen static int loongson2_pinctrl_probe(struct platform_device *pdev) 253*f73f88acSzhanghongchen { 254*f73f88acSzhanghongchen struct device *dev = &pdev->dev; 255*f73f88acSzhanghongchen struct loongson2_pinctrl *pctrl; 256*f73f88acSzhanghongchen 257*f73f88acSzhanghongchen pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); 258*f73f88acSzhanghongchen if (!pctrl) 259*f73f88acSzhanghongchen return -ENOMEM; 260*f73f88acSzhanghongchen 261*f73f88acSzhanghongchen pctrl->reg_base = devm_platform_ioremap_resource(pdev, 0); 262*f73f88acSzhanghongchen if (IS_ERR(pctrl->reg_base)) 263*f73f88acSzhanghongchen return PTR_ERR(pctrl->reg_base); 264*f73f88acSzhanghongchen 265*f73f88acSzhanghongchen spin_lock_init(&pctrl->lock); 266*f73f88acSzhanghongchen 267*f73f88acSzhanghongchen pctrl->dev = dev; 268*f73f88acSzhanghongchen pctrl->desc.name = "pinctrl-loongson2"; 269*f73f88acSzhanghongchen pctrl->desc.owner = THIS_MODULE; 270*f73f88acSzhanghongchen pctrl->desc.pctlops = &loongson2_pctrl_ops; 271*f73f88acSzhanghongchen pctrl->desc.pmxops = &loongson2_pmx_ops; 272*f73f88acSzhanghongchen pctrl->desc.pins = loongson2_pctrl_pins; 273*f73f88acSzhanghongchen pctrl->desc.npins = ARRAY_SIZE(loongson2_pctrl_pins); 274*f73f88acSzhanghongchen 275*f73f88acSzhanghongchen pctrl->pcdev = devm_pinctrl_register(pctrl->dev, &pctrl->desc, pctrl); 276*f73f88acSzhanghongchen if (IS_ERR(pctrl->pcdev)) 277*f73f88acSzhanghongchen return dev_err_probe(pctrl->dev, PTR_ERR(pctrl->pcdev), 278*f73f88acSzhanghongchen "can't register pinctrl device"); 279*f73f88acSzhanghongchen 280*f73f88acSzhanghongchen return 0; 281*f73f88acSzhanghongchen } 282*f73f88acSzhanghongchen 283*f73f88acSzhanghongchen static const struct of_device_id loongson2_pinctrl_dt_match[] = { 284*f73f88acSzhanghongchen { 285*f73f88acSzhanghongchen .compatible = "loongson,ls2k-pinctrl", 286*f73f88acSzhanghongchen }, 287*f73f88acSzhanghongchen { } 288*f73f88acSzhanghongchen }; 289*f73f88acSzhanghongchen 290*f73f88acSzhanghongchen static struct platform_driver loongson2_pinctrl_driver = { 291*f73f88acSzhanghongchen .probe = loongson2_pinctrl_probe, 292*f73f88acSzhanghongchen .driver = { 293*f73f88acSzhanghongchen .name = "loongson2-pinctrl", 294*f73f88acSzhanghongchen .of_match_table = loongson2_pinctrl_dt_match, 295*f73f88acSzhanghongchen }, 296*f73f88acSzhanghongchen }; 297*f73f88acSzhanghongchen 298*f73f88acSzhanghongchen static int __init loongson2_pinctrl_init(void) 299*f73f88acSzhanghongchen { 300*f73f88acSzhanghongchen return platform_driver_register(&loongson2_pinctrl_driver); 301*f73f88acSzhanghongchen } 302*f73f88acSzhanghongchen arch_initcall(loongson2_pinctrl_init); 303*f73f88acSzhanghongchen 304*f73f88acSzhanghongchen static void __exit loongson2_pinctrl_exit(void) 305*f73f88acSzhanghongchen { 306*f73f88acSzhanghongchen platform_driver_unregister(&loongson2_pinctrl_driver); 307*f73f88acSzhanghongchen } 308*f73f88acSzhanghongchen module_exit(loongson2_pinctrl_exit); 309*f73f88acSzhanghongchen 310*f73f88acSzhanghongchen MODULE_DESCRIPTION("Loongson2 Pinctrl driver"); 311*f73f88acSzhanghongchen MODULE_LICENSE("GPL"); 312