1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2016 Broadcom Corporation 3 * 4 * This file contains the Northstar2 IOMUX driver that supports group 5 * based PINMUX configuration. The PWM is functional only when the 6 * corresponding mfio pin group is selected as gpio. 7 */ 8 9 #include <linux/err.h> 10 #include <linux/io.h> 11 #include <linux/of.h> 12 #include <linux/platform_device.h> 13 #include <linux/seq_file.h> 14 #include <linux/slab.h> 15 16 #include <linux/pinctrl/pinconf-generic.h> 17 #include <linux/pinctrl/pinconf.h> 18 #include <linux/pinctrl/pinctrl.h> 19 #include <linux/pinctrl/pinmux.h> 20 21 #include "../core.h" 22 #include "../pinctrl-utils.h" 23 24 #define NS2_NUM_IOMUX 19 25 #define NS2_NUM_PWM_MUX 4 26 27 #define NS2_PIN_MUX_BASE0 0x00 28 #define NS2_PIN_MUX_BASE1 0x01 29 #define NS2_PIN_CONF_BASE 0x02 30 #define NS2_MUX_PAD_FUNC1_OFFSET 0x04 31 32 #define NS2_PIN_SRC_MASK 0x01 33 #define NS2_PIN_PULL_MASK 0x03 34 #define NS2_PIN_DRIVE_STRENGTH_MASK 0x07 35 36 #define NS2_PIN_PULL_UP 0x01 37 #define NS2_PIN_PULL_DOWN 0x02 38 39 #define NS2_PIN_INPUT_EN_MASK 0x01 40 41 /* 42 * Northstar2 IOMUX register description 43 * 44 * @base: base address number 45 * @offset: register offset for mux configuration of a group 46 * @shift: bit shift for mux configuration of a group 47 * @mask: mask bits 48 * @alt: alternate function to set to 49 */ 50 struct ns2_mux { 51 unsigned int base; 52 unsigned int offset; 53 unsigned int shift; 54 unsigned int mask; 55 unsigned int alt; 56 }; 57 58 /* 59 * Keep track of Northstar2 IOMUX configuration and prevent double 60 * configuration 61 * 62 * @ns2_mux: Northstar2 IOMUX register description 63 * @is_configured: flag to indicate whether a mux setting has already 64 * been configured 65 */ 66 struct ns2_mux_log { 67 struct ns2_mux mux; 68 bool is_configured; 69 }; 70 71 /* 72 * Group based IOMUX configuration 73 * 74 * @name: name of the group 75 * @pins: array of pins used by this group 76 * @num_pins: total number of pins used by this group 77 * @mux: Northstar2 group based IOMUX configuration 78 */ 79 struct ns2_pin_group { 80 const char *name; 81 const unsigned int *pins; 82 const unsigned int num_pins; 83 const struct ns2_mux mux; 84 }; 85 86 /* 87 * Northstar2 mux function and supported pin groups 88 * 89 * @name: name of the function 90 * @groups: array of groups that can be supported by this function 91 * @num_groups: total number of groups that can be supported by function 92 */ 93 struct ns2_pin_function { 94 const char *name; 95 const char * const *groups; 96 const unsigned int num_groups; 97 }; 98 99 /* 100 * Northstar2 IOMUX pinctrl core 101 * 102 * @pctl: pointer to pinctrl_dev 103 * @dev: pointer to device 104 * @base0: first IOMUX register base 105 * @base1: second IOMUX register base 106 * @pinconf_base: configuration register base 107 * @groups: pointer to array of groups 108 * @num_groups: total number of groups 109 * @functions: pointer to array of functions 110 * @num_functions: total number of functions 111 * @mux_log: pointer to the array of mux logs 112 * @lock: lock to protect register access 113 */ 114 struct ns2_pinctrl { 115 struct pinctrl_dev *pctl; 116 struct device *dev; 117 void __iomem *base0; 118 void __iomem *base1; 119 void __iomem *pinconf_base; 120 121 const struct ns2_pin_group *groups; 122 unsigned int num_groups; 123 124 const struct ns2_pin_function *functions; 125 unsigned int num_functions; 126 127 struct ns2_mux_log *mux_log; 128 129 spinlock_t lock; 130 }; 131 132 /* 133 * Pin configuration info 134 * 135 * @base: base address number 136 * @offset: register offset from base 137 * @src_shift: slew rate control bit shift in the register 138 * @input_en: input enable control bit shift 139 * @pull_shift: pull-up/pull-down control bit shift in the register 140 * @drive_shift: drive strength control bit shift in the register 141 */ 142 struct ns2_pinconf { 143 unsigned int base; 144 unsigned int offset; 145 unsigned int src_shift; 146 unsigned int input_en; 147 unsigned int pull_shift; 148 unsigned int drive_shift; 149 }; 150 151 /* 152 * Description of a pin in Northstar2 153 * 154 * @pin: pin number 155 * @name: pin name 156 * @pin_conf: pin configuration structure 157 */ 158 struct ns2_pin { 159 unsigned int pin; 160 char *name; 161 struct ns2_pinconf pin_conf; 162 }; 163 164 #define NS2_PIN_DESC(p, n, b, o, s, i, pu, d) \ 165 { \ 166 .pin = p, \ 167 .name = n, \ 168 .pin_conf = { \ 169 .base = b, \ 170 .offset = o, \ 171 .src_shift = s, \ 172 .input_en = i, \ 173 .pull_shift = pu, \ 174 .drive_shift = d, \ 175 } \ 176 } 177 178 /* 179 * List of pins in Northstar2 180 */ 181 static struct ns2_pin ns2_pins[] = { 182 NS2_PIN_DESC(0, "mfio_0", -1, 0, 0, 0, 0, 0), 183 NS2_PIN_DESC(1, "mfio_1", -1, 0, 0, 0, 0, 0), 184 NS2_PIN_DESC(2, "mfio_2", -1, 0, 0, 0, 0, 0), 185 NS2_PIN_DESC(3, "mfio_3", -1, 0, 0, 0, 0, 0), 186 NS2_PIN_DESC(4, "mfio_4", -1, 0, 0, 0, 0, 0), 187 NS2_PIN_DESC(5, "mfio_5", -1, 0, 0, 0, 0, 0), 188 NS2_PIN_DESC(6, "mfio_6", -1, 0, 0, 0, 0, 0), 189 NS2_PIN_DESC(7, "mfio_7", -1, 0, 0, 0, 0, 0), 190 NS2_PIN_DESC(8, "mfio_8", -1, 0, 0, 0, 0, 0), 191 NS2_PIN_DESC(9, "mfio_9", -1, 0, 0, 0, 0, 0), 192 NS2_PIN_DESC(10, "mfio_10", -1, 0, 0, 0, 0, 0), 193 NS2_PIN_DESC(11, "mfio_11", -1, 0, 0, 0, 0, 0), 194 NS2_PIN_DESC(12, "mfio_12", -1, 0, 0, 0, 0, 0), 195 NS2_PIN_DESC(13, "mfio_13", -1, 0, 0, 0, 0, 0), 196 NS2_PIN_DESC(14, "mfio_14", -1, 0, 0, 0, 0, 0), 197 NS2_PIN_DESC(15, "mfio_15", -1, 0, 0, 0, 0, 0), 198 NS2_PIN_DESC(16, "mfio_16", -1, 0, 0, 0, 0, 0), 199 NS2_PIN_DESC(17, "mfio_17", -1, 0, 0, 0, 0, 0), 200 NS2_PIN_DESC(18, "mfio_18", -1, 0, 0, 0, 0, 0), 201 NS2_PIN_DESC(19, "mfio_19", -1, 0, 0, 0, 0, 0), 202 NS2_PIN_DESC(20, "mfio_20", -1, 0, 0, 0, 0, 0), 203 NS2_PIN_DESC(21, "mfio_21", -1, 0, 0, 0, 0, 0), 204 NS2_PIN_DESC(22, "mfio_22", -1, 0, 0, 0, 0, 0), 205 NS2_PIN_DESC(23, "mfio_23", -1, 0, 0, 0, 0, 0), 206 NS2_PIN_DESC(24, "mfio_24", -1, 0, 0, 0, 0, 0), 207 NS2_PIN_DESC(25, "mfio_25", -1, 0, 0, 0, 0, 0), 208 NS2_PIN_DESC(26, "mfio_26", -1, 0, 0, 0, 0, 0), 209 NS2_PIN_DESC(27, "mfio_27", -1, 0, 0, 0, 0, 0), 210 NS2_PIN_DESC(28, "mfio_28", -1, 0, 0, 0, 0, 0), 211 NS2_PIN_DESC(29, "mfio_29", -1, 0, 0, 0, 0, 0), 212 NS2_PIN_DESC(30, "mfio_30", -1, 0, 0, 0, 0, 0), 213 NS2_PIN_DESC(31, "mfio_31", -1, 0, 0, 0, 0, 0), 214 NS2_PIN_DESC(32, "mfio_32", -1, 0, 0, 0, 0, 0), 215 NS2_PIN_DESC(33, "mfio_33", -1, 0, 0, 0, 0, 0), 216 NS2_PIN_DESC(34, "mfio_34", -1, 0, 0, 0, 0, 0), 217 NS2_PIN_DESC(35, "mfio_35", -1, 0, 0, 0, 0, 0), 218 NS2_PIN_DESC(36, "mfio_36", -1, 0, 0, 0, 0, 0), 219 NS2_PIN_DESC(37, "mfio_37", -1, 0, 0, 0, 0, 0), 220 NS2_PIN_DESC(38, "mfio_38", -1, 0, 0, 0, 0, 0), 221 NS2_PIN_DESC(39, "mfio_39", -1, 0, 0, 0, 0, 0), 222 NS2_PIN_DESC(40, "mfio_40", -1, 0, 0, 0, 0, 0), 223 NS2_PIN_DESC(41, "mfio_41", -1, 0, 0, 0, 0, 0), 224 NS2_PIN_DESC(42, "mfio_42", -1, 0, 0, 0, 0, 0), 225 NS2_PIN_DESC(43, "mfio_43", -1, 0, 0, 0, 0, 0), 226 NS2_PIN_DESC(44, "mfio_44", -1, 0, 0, 0, 0, 0), 227 NS2_PIN_DESC(45, "mfio_45", -1, 0, 0, 0, 0, 0), 228 NS2_PIN_DESC(46, "mfio_46", -1, 0, 0, 0, 0, 0), 229 NS2_PIN_DESC(47, "mfio_47", -1, 0, 0, 0, 0, 0), 230 NS2_PIN_DESC(48, "mfio_48", -1, 0, 0, 0, 0, 0), 231 NS2_PIN_DESC(49, "mfio_49", -1, 0, 0, 0, 0, 0), 232 NS2_PIN_DESC(50, "mfio_50", -1, 0, 0, 0, 0, 0), 233 NS2_PIN_DESC(51, "mfio_51", -1, 0, 0, 0, 0, 0), 234 NS2_PIN_DESC(52, "mfio_52", -1, 0, 0, 0, 0, 0), 235 NS2_PIN_DESC(53, "mfio_53", -1, 0, 0, 0, 0, 0), 236 NS2_PIN_DESC(54, "mfio_54", -1, 0, 0, 0, 0, 0), 237 NS2_PIN_DESC(55, "mfio_55", -1, 0, 0, 0, 0, 0), 238 NS2_PIN_DESC(56, "mfio_56", -1, 0, 0, 0, 0, 0), 239 NS2_PIN_DESC(57, "mfio_57", -1, 0, 0, 0, 0, 0), 240 NS2_PIN_DESC(58, "mfio_58", -1, 0, 0, 0, 0, 0), 241 NS2_PIN_DESC(59, "mfio_59", -1, 0, 0, 0, 0, 0), 242 NS2_PIN_DESC(60, "mfio_60", -1, 0, 0, 0, 0, 0), 243 NS2_PIN_DESC(61, "mfio_61", -1, 0, 0, 0, 0, 0), 244 NS2_PIN_DESC(62, "mfio_62", -1, 0, 0, 0, 0, 0), 245 NS2_PIN_DESC(63, "qspi_wp", 2, 0x0, 31, 30, 27, 24), 246 NS2_PIN_DESC(64, "qspi_hold", 2, 0x0, 23, 22, 19, 16), 247 NS2_PIN_DESC(65, "qspi_cs", 2, 0x0, 15, 14, 11, 8), 248 NS2_PIN_DESC(66, "qspi_sck", 2, 0x0, 7, 6, 3, 0), 249 NS2_PIN_DESC(67, "uart3_sin", 2, 0x04, 31, 30, 27, 24), 250 NS2_PIN_DESC(68, "uart3_sout", 2, 0x04, 23, 22, 19, 16), 251 NS2_PIN_DESC(69, "qspi_mosi", 2, 0x04, 15, 14, 11, 8), 252 NS2_PIN_DESC(70, "qspi_miso", 2, 0x04, 7, 6, 3, 0), 253 NS2_PIN_DESC(71, "spi0_fss", 2, 0x08, 31, 30, 27, 24), 254 NS2_PIN_DESC(72, "spi0_rxd", 2, 0x08, 23, 22, 19, 16), 255 NS2_PIN_DESC(73, "spi0_txd", 2, 0x08, 15, 14, 11, 8), 256 NS2_PIN_DESC(74, "spi0_sck", 2, 0x08, 7, 6, 3, 0), 257 NS2_PIN_DESC(75, "spi1_fss", 2, 0x0c, 31, 30, 27, 24), 258 NS2_PIN_DESC(76, "spi1_rxd", 2, 0x0c, 23, 22, 19, 16), 259 NS2_PIN_DESC(77, "spi1_txd", 2, 0x0c, 15, 14, 11, 8), 260 NS2_PIN_DESC(78, "spi1_sck", 2, 0x0c, 7, 6, 3, 0), 261 NS2_PIN_DESC(79, "sdio0_data7", 2, 0x10, 31, 30, 27, 24), 262 NS2_PIN_DESC(80, "sdio0_emmc_rst", 2, 0x10, 23, 22, 19, 16), 263 NS2_PIN_DESC(81, "sdio0_led_on", 2, 0x10, 15, 14, 11, 8), 264 NS2_PIN_DESC(82, "sdio0_wp", 2, 0x10, 7, 6, 3, 0), 265 NS2_PIN_DESC(83, "sdio0_data3", 2, 0x14, 31, 30, 27, 24), 266 NS2_PIN_DESC(84, "sdio0_data4", 2, 0x14, 23, 22, 19, 16), 267 NS2_PIN_DESC(85, "sdio0_data5", 2, 0x14, 15, 14, 11, 8), 268 NS2_PIN_DESC(86, "sdio0_data6", 2, 0x14, 7, 6, 3, 0), 269 NS2_PIN_DESC(87, "sdio0_cmd", 2, 0x18, 31, 30, 27, 24), 270 NS2_PIN_DESC(88, "sdio0_data0", 2, 0x18, 23, 22, 19, 16), 271 NS2_PIN_DESC(89, "sdio0_data1", 2, 0x18, 15, 14, 11, 8), 272 NS2_PIN_DESC(90, "sdio0_data2", 2, 0x18, 7, 6, 3, 0), 273 NS2_PIN_DESC(91, "sdio1_led_on", 2, 0x1c, 31, 30, 27, 24), 274 NS2_PIN_DESC(92, "sdio1_wp", 2, 0x1c, 23, 22, 19, 16), 275 NS2_PIN_DESC(93, "sdio0_cd_l", 2, 0x1c, 15, 14, 11, 8), 276 NS2_PIN_DESC(94, "sdio0_clk", 2, 0x1c, 7, 6, 3, 0), 277 NS2_PIN_DESC(95, "sdio1_data5", 2, 0x20, 31, 30, 27, 24), 278 NS2_PIN_DESC(96, "sdio1_data6", 2, 0x20, 23, 22, 19, 16), 279 NS2_PIN_DESC(97, "sdio1_data7", 2, 0x20, 15, 14, 11, 8), 280 NS2_PIN_DESC(98, "sdio1_emmc_rst", 2, 0x20, 7, 6, 3, 0), 281 NS2_PIN_DESC(99, "sdio1_data1", 2, 0x24, 31, 30, 27, 24), 282 NS2_PIN_DESC(100, "sdio1_data2", 2, 0x24, 23, 22, 19, 16), 283 NS2_PIN_DESC(101, "sdio1_data3", 2, 0x24, 15, 14, 11, 8), 284 NS2_PIN_DESC(102, "sdio1_data4", 2, 0x24, 7, 6, 3, 0), 285 NS2_PIN_DESC(103, "sdio1_cd_l", 2, 0x28, 31, 30, 27, 24), 286 NS2_PIN_DESC(104, "sdio1_clk", 2, 0x28, 23, 22, 19, 16), 287 NS2_PIN_DESC(105, "sdio1_cmd", 2, 0x28, 15, 14, 11, 8), 288 NS2_PIN_DESC(106, "sdio1_data0", 2, 0x28, 7, 6, 3, 0), 289 NS2_PIN_DESC(107, "ext_mdio_0", 2, 0x2c, 15, 14, 11, 8), 290 NS2_PIN_DESC(108, "ext_mdc_0", 2, 0x2c, 7, 6, 3, 0), 291 NS2_PIN_DESC(109, "usb3_p1_vbus_ppc", 2, 0x34, 31, 30, 27, 24), 292 NS2_PIN_DESC(110, "usb3_p1_overcurrent", 2, 0x34, 23, 22, 19, 16), 293 NS2_PIN_DESC(111, "usb3_p0_vbus_ppc", 2, 0x34, 15, 14, 11, 8), 294 NS2_PIN_DESC(112, "usb3_p0_overcurrent", 2, 0x34, 7, 6, 3, 0), 295 NS2_PIN_DESC(113, "usb2_presence_indication", 2, 0x38, 31, 30, 27, 24), 296 NS2_PIN_DESC(114, "usb2_vbus_present", 2, 0x38, 23, 22, 19, 16), 297 NS2_PIN_DESC(115, "usb2_vbus_ppc", 2, 0x38, 15, 14, 11, 8), 298 NS2_PIN_DESC(116, "usb2_overcurrent", 2, 0x38, 7, 6, 3, 0), 299 NS2_PIN_DESC(117, "sata_led1", 2, 0x3c, 15, 14, 11, 8), 300 NS2_PIN_DESC(118, "sata_led0", 2, 0x3c, 7, 6, 3, 0), 301 }; 302 303 /* 304 * List of groups of pins 305 */ 306 307 static const unsigned int nand_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 308 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23}; 309 static const unsigned int nor_data_pins[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 310 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25}; 311 312 static const unsigned int gpio_0_1_pins[] = {24, 25}; 313 static const unsigned int pwm_0_pins[] = {24}; 314 static const unsigned int pwm_1_pins[] = {25}; 315 316 static const unsigned int uart1_ext_clk_pins[] = {26}; 317 static const unsigned int nor_adv_pins[] = {26}; 318 319 static const unsigned int gpio_2_5_pins[] = {27, 28, 29, 30}; 320 static const unsigned int pcie_ab1_clk_wak_pins[] = {27, 28, 29, 30}; 321 static const unsigned int nor_addr_0_3_pins[] = {27, 28, 29, 30}; 322 static const unsigned int pwm_2_pins[] = {27}; 323 static const unsigned int pwm_3_pins[] = {28}; 324 325 static const unsigned int gpio_6_7_pins[] = {31, 32}; 326 static const unsigned int pcie_a3_clk_wak_pins[] = {31, 32}; 327 static const unsigned int nor_addr_4_5_pins[] = {31, 32}; 328 329 static const unsigned int gpio_8_9_pins[] = {33, 34}; 330 static const unsigned int pcie_b3_clk_wak_pins[] = {33, 34}; 331 static const unsigned int nor_addr_6_7_pins[] = {33, 34}; 332 333 static const unsigned int gpio_10_11_pins[] = {35, 36}; 334 static const unsigned int pcie_b2_clk_wak_pins[] = {35, 36}; 335 static const unsigned int nor_addr_8_9_pins[] = {35, 36}; 336 337 static const unsigned int gpio_12_13_pins[] = {37, 38}; 338 static const unsigned int pcie_a2_clk_wak_pins[] = {37, 38}; 339 static const unsigned int nor_addr_10_11_pins[] = {37, 38}; 340 341 static const unsigned int gpio_14_17_pins[] = {39, 40, 41, 42}; 342 static const unsigned int uart0_modem_pins[] = {39, 40, 41, 42}; 343 static const unsigned int nor_addr_12_15_pins[] = {39, 40, 41, 42}; 344 345 static const unsigned int gpio_18_19_pins[] = {43, 44}; 346 static const unsigned int uart0_rts_cts_pins[] = {43, 44}; 347 348 static const unsigned int gpio_20_21_pins[] = {45, 46}; 349 static const unsigned int uart0_in_out_pins[] = {45, 46}; 350 351 static const unsigned int gpio_22_23_pins[] = {47, 48}; 352 static const unsigned int uart1_dcd_dsr_pins[] = {47, 48}; 353 354 static const unsigned int gpio_24_25_pins[] = {49, 50}; 355 static const unsigned int uart1_ri_dtr_pins[] = {49, 50}; 356 357 static const unsigned int gpio_26_27_pins[] = {51, 52}; 358 static const unsigned int uart1_rts_cts_pins[] = {51, 52}; 359 360 static const unsigned int gpio_28_29_pins[] = {53, 54}; 361 static const unsigned int uart1_in_out_pins[] = {53, 54}; 362 363 static const unsigned int gpio_30_31_pins[] = {55, 56}; 364 static const unsigned int uart2_rts_cts_pins[] = {55, 56}; 365 366 #define NS2_PIN_GROUP(group_name, ba, off, sh, ma, al) \ 367 { \ 368 .name = __stringify(group_name) "_grp", \ 369 .pins = group_name ## _pins, \ 370 .num_pins = ARRAY_SIZE(group_name ## _pins), \ 371 .mux = { \ 372 .base = ba, \ 373 .offset = off, \ 374 .shift = sh, \ 375 .mask = ma, \ 376 .alt = al, \ 377 } \ 378 } 379 380 /* 381 * List of Northstar2 pin groups 382 */ 383 static const struct ns2_pin_group ns2_pin_groups[] = { 384 NS2_PIN_GROUP(nand, 0, 0, 31, 1, 0), 385 NS2_PIN_GROUP(nor_data, 0, 0, 31, 1, 1), 386 NS2_PIN_GROUP(gpio_0_1, 0, 0, 31, 1, 0), 387 388 NS2_PIN_GROUP(uart1_ext_clk, 0, 4, 30, 3, 1), 389 NS2_PIN_GROUP(nor_adv, 0, 4, 30, 3, 2), 390 391 NS2_PIN_GROUP(gpio_2_5, 0, 4, 28, 3, 0), 392 NS2_PIN_GROUP(pcie_ab1_clk_wak, 0, 4, 28, 3, 1), 393 NS2_PIN_GROUP(nor_addr_0_3, 0, 4, 28, 3, 2), 394 395 NS2_PIN_GROUP(gpio_6_7, 0, 4, 26, 3, 0), 396 NS2_PIN_GROUP(pcie_a3_clk_wak, 0, 4, 26, 3, 1), 397 NS2_PIN_GROUP(nor_addr_4_5, 0, 4, 26, 3, 2), 398 399 NS2_PIN_GROUP(gpio_8_9, 0, 4, 24, 3, 0), 400 NS2_PIN_GROUP(pcie_b3_clk_wak, 0, 4, 24, 3, 1), 401 NS2_PIN_GROUP(nor_addr_6_7, 0, 4, 24, 3, 2), 402 403 NS2_PIN_GROUP(gpio_10_11, 0, 4, 22, 3, 0), 404 NS2_PIN_GROUP(pcie_b2_clk_wak, 0, 4, 22, 3, 1), 405 NS2_PIN_GROUP(nor_addr_8_9, 0, 4, 22, 3, 2), 406 407 NS2_PIN_GROUP(gpio_12_13, 0, 4, 20, 3, 0), 408 NS2_PIN_GROUP(pcie_a2_clk_wak, 0, 4, 20, 3, 1), 409 NS2_PIN_GROUP(nor_addr_10_11, 0, 4, 20, 3, 2), 410 411 NS2_PIN_GROUP(gpio_14_17, 0, 4, 18, 3, 0), 412 NS2_PIN_GROUP(uart0_modem, 0, 4, 18, 3, 1), 413 NS2_PIN_GROUP(nor_addr_12_15, 0, 4, 18, 3, 2), 414 415 NS2_PIN_GROUP(gpio_18_19, 0, 4, 16, 3, 0), 416 NS2_PIN_GROUP(uart0_rts_cts, 0, 4, 16, 3, 1), 417 418 NS2_PIN_GROUP(gpio_20_21, 0, 4, 14, 3, 0), 419 NS2_PIN_GROUP(uart0_in_out, 0, 4, 14, 3, 1), 420 421 NS2_PIN_GROUP(gpio_22_23, 0, 4, 12, 3, 0), 422 NS2_PIN_GROUP(uart1_dcd_dsr, 0, 4, 12, 3, 1), 423 424 NS2_PIN_GROUP(gpio_24_25, 0, 4, 10, 3, 0), 425 NS2_PIN_GROUP(uart1_ri_dtr, 0, 4, 10, 3, 1), 426 427 NS2_PIN_GROUP(gpio_26_27, 0, 4, 8, 3, 0), 428 NS2_PIN_GROUP(uart1_rts_cts, 0, 4, 8, 3, 1), 429 430 NS2_PIN_GROUP(gpio_28_29, 0, 4, 6, 3, 0), 431 NS2_PIN_GROUP(uart1_in_out, 0, 4, 6, 3, 1), 432 433 NS2_PIN_GROUP(gpio_30_31, 0, 4, 4, 3, 0), 434 NS2_PIN_GROUP(uart2_rts_cts, 0, 4, 4, 3, 1), 435 436 NS2_PIN_GROUP(pwm_0, 1, 0, 0, 1, 1), 437 NS2_PIN_GROUP(pwm_1, 1, 0, 1, 1, 1), 438 NS2_PIN_GROUP(pwm_2, 1, 0, 2, 1, 1), 439 NS2_PIN_GROUP(pwm_3, 1, 0, 3, 1, 1), 440 }; 441 442 /* 443 * List of groups supported by functions 444 */ 445 446 static const char * const nand_grps[] = {"nand_grp"}; 447 448 static const char * const nor_grps[] = {"nor_data_grp", "nor_adv_grp", 449 "nor_addr_0_3_grp", "nor_addr_4_5_grp", "nor_addr_6_7_grp", 450 "nor_addr_8_9_grp", "nor_addr_10_11_grp", "nor_addr_12_15_grp"}; 451 452 static const char * const gpio_grps[] = {"gpio_0_1_grp", "gpio_2_5_grp", 453 "gpio_6_7_grp", "gpio_8_9_grp", "gpio_10_11_grp", "gpio_12_13_grp", 454 "gpio_14_17_grp", "gpio_18_19_grp", "gpio_20_21_grp", "gpio_22_23_grp", 455 "gpio_24_25_grp", "gpio_26_27_grp", "gpio_28_29_grp", 456 "gpio_30_31_grp"}; 457 458 static const char * const pcie_grps[] = {"pcie_ab1_clk_wak_grp", 459 "pcie_a3_clk_wak_grp", "pcie_b3_clk_wak_grp", "pcie_b2_clk_wak_grp", 460 "pcie_a2_clk_wak_grp"}; 461 462 static const char * const uart0_grps[] = {"uart0_modem_grp", 463 "uart0_rts_cts_grp", "uart0_in_out_grp"}; 464 465 static const char * const uart1_grps[] = {"uart1_ext_clk_grp", 466 "uart1_dcd_dsr_grp", "uart1_ri_dtr_grp", "uart1_rts_cts_grp", 467 "uart1_in_out_grp"}; 468 469 static const char * const uart2_grps[] = {"uart2_rts_cts_grp"}; 470 471 static const char * const pwm_grps[] = {"pwm_0_grp", "pwm_1_grp", 472 "pwm_2_grp", "pwm_3_grp"}; 473 474 #define NS2_PIN_FUNCTION(func) \ 475 { \ 476 .name = #func, \ 477 .groups = func ## _grps, \ 478 .num_groups = ARRAY_SIZE(func ## _grps), \ 479 } 480 481 /* 482 * List of supported functions 483 */ 484 static const struct ns2_pin_function ns2_pin_functions[] = { 485 NS2_PIN_FUNCTION(nand), 486 NS2_PIN_FUNCTION(nor), 487 NS2_PIN_FUNCTION(gpio), 488 NS2_PIN_FUNCTION(pcie), 489 NS2_PIN_FUNCTION(uart0), 490 NS2_PIN_FUNCTION(uart1), 491 NS2_PIN_FUNCTION(uart2), 492 NS2_PIN_FUNCTION(pwm), 493 }; 494 ns2_get_groups_count(struct pinctrl_dev * pctrl_dev)495 static int ns2_get_groups_count(struct pinctrl_dev *pctrl_dev) 496 { 497 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 498 499 return pinctrl->num_groups; 500 } 501 ns2_get_group_name(struct pinctrl_dev * pctrl_dev,unsigned int selector)502 static const char *ns2_get_group_name(struct pinctrl_dev *pctrl_dev, 503 unsigned int selector) 504 { 505 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 506 507 return pinctrl->groups[selector].name; 508 } 509 ns2_get_group_pins(struct pinctrl_dev * pctrl_dev,unsigned int selector,const unsigned int ** pins,unsigned int * num_pins)510 static int ns2_get_group_pins(struct pinctrl_dev *pctrl_dev, 511 unsigned int selector, const unsigned int **pins, 512 unsigned int *num_pins) 513 { 514 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 515 516 *pins = pinctrl->groups[selector].pins; 517 *num_pins = pinctrl->groups[selector].num_pins; 518 519 return 0; 520 } 521 ns2_pin_dbg_show(struct pinctrl_dev * pctrl_dev,struct seq_file * s,unsigned int offset)522 static void ns2_pin_dbg_show(struct pinctrl_dev *pctrl_dev, 523 struct seq_file *s, unsigned int offset) 524 { 525 seq_printf(s, " %s", dev_name(pctrl_dev->dev)); 526 } 527 528 static const struct pinctrl_ops ns2_pinctrl_ops = { 529 .get_groups_count = ns2_get_groups_count, 530 .get_group_name = ns2_get_group_name, 531 .get_group_pins = ns2_get_group_pins, 532 .pin_dbg_show = ns2_pin_dbg_show, 533 .dt_node_to_map = pinconf_generic_dt_node_to_map_pin, 534 .dt_free_map = pinctrl_utils_free_map, 535 }; 536 ns2_get_functions_count(struct pinctrl_dev * pctrl_dev)537 static int ns2_get_functions_count(struct pinctrl_dev *pctrl_dev) 538 { 539 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 540 541 return pinctrl->num_functions; 542 } 543 ns2_get_function_name(struct pinctrl_dev * pctrl_dev,unsigned int selector)544 static const char *ns2_get_function_name(struct pinctrl_dev *pctrl_dev, 545 unsigned int selector) 546 { 547 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 548 549 return pinctrl->functions[selector].name; 550 } 551 ns2_get_function_groups(struct pinctrl_dev * pctrl_dev,unsigned int selector,const char * const ** groups,unsigned int * const num_groups)552 static int ns2_get_function_groups(struct pinctrl_dev *pctrl_dev, 553 unsigned int selector, 554 const char * const **groups, 555 unsigned int * const num_groups) 556 { 557 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 558 559 *groups = pinctrl->functions[selector].groups; 560 *num_groups = pinctrl->functions[selector].num_groups; 561 562 return 0; 563 } 564 ns2_pinmux_set(struct ns2_pinctrl * pinctrl,const struct ns2_pin_function * func,const struct ns2_pin_group * grp,struct ns2_mux_log * mux_log)565 static int ns2_pinmux_set(struct ns2_pinctrl *pinctrl, 566 const struct ns2_pin_function *func, 567 const struct ns2_pin_group *grp, 568 struct ns2_mux_log *mux_log) 569 { 570 const struct ns2_mux *mux = &grp->mux; 571 int i; 572 u32 val, mask; 573 unsigned long flags; 574 void __iomem *base_address; 575 576 for (i = 0; i < NS2_NUM_IOMUX; i++) { 577 if ((mux->shift != mux_log[i].mux.shift) || 578 (mux->base != mux_log[i].mux.base) || 579 (mux->offset != mux_log[i].mux.offset)) 580 continue; 581 582 /* if this is a new configuration, just do it! */ 583 if (!mux_log[i].is_configured) 584 break; 585 586 /* 587 * IOMUX has been configured previously and one is trying to 588 * configure it to a different function 589 */ 590 if (mux_log[i].mux.alt != mux->alt) { 591 dev_err(pinctrl->dev, 592 "double configuration error detected!\n"); 593 dev_err(pinctrl->dev, "func:%s grp:%s\n", 594 func->name, grp->name); 595 return -EINVAL; 596 } 597 598 return 0; 599 } 600 if (i == NS2_NUM_IOMUX) 601 return -EINVAL; 602 603 mask = mux->mask; 604 mux_log[i].mux.alt = mux->alt; 605 mux_log[i].is_configured = true; 606 607 switch (mux->base) { 608 case NS2_PIN_MUX_BASE0: 609 base_address = pinctrl->base0; 610 break; 611 612 case NS2_PIN_MUX_BASE1: 613 base_address = pinctrl->base1; 614 break; 615 616 default: 617 return -EINVAL; 618 } 619 620 spin_lock_irqsave(&pinctrl->lock, flags); 621 val = readl(base_address + grp->mux.offset); 622 val &= ~(mask << grp->mux.shift); 623 val |= grp->mux.alt << grp->mux.shift; 624 writel(val, (base_address + grp->mux.offset)); 625 spin_unlock_irqrestore(&pinctrl->lock, flags); 626 627 return 0; 628 } 629 ns2_pinmux_enable(struct pinctrl_dev * pctrl_dev,unsigned int func_select,unsigned int grp_select)630 static int ns2_pinmux_enable(struct pinctrl_dev *pctrl_dev, 631 unsigned int func_select, unsigned int grp_select) 632 { 633 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrl_dev); 634 const struct ns2_pin_function *func; 635 const struct ns2_pin_group *grp; 636 637 if (grp_select >= pinctrl->num_groups || 638 func_select >= pinctrl->num_functions) 639 return -EINVAL; 640 641 func = &pinctrl->functions[func_select]; 642 grp = &pinctrl->groups[grp_select]; 643 644 dev_dbg(pctrl_dev->dev, "func:%u name:%s grp:%u name:%s\n", 645 func_select, func->name, grp_select, grp->name); 646 647 dev_dbg(pctrl_dev->dev, "offset:0x%08x shift:%u alt:%u\n", 648 grp->mux.offset, grp->mux.shift, grp->mux.alt); 649 650 return ns2_pinmux_set(pinctrl, func, grp, pinctrl->mux_log); 651 } 652 ns2_pin_set_enable(struct pinctrl_dev * pctrldev,unsigned int pin,u16 enable)653 static int ns2_pin_set_enable(struct pinctrl_dev *pctrldev, unsigned int pin, 654 u16 enable) 655 { 656 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 657 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 658 unsigned long flags; 659 u32 val; 660 void __iomem *base_address; 661 662 base_address = pinctrl->pinconf_base; 663 spin_lock_irqsave(&pinctrl->lock, flags); 664 val = readl(base_address + pin_data->pin_conf.offset); 665 val &= ~(NS2_PIN_SRC_MASK << pin_data->pin_conf.input_en); 666 667 if (!enable) 668 val |= NS2_PIN_INPUT_EN_MASK << pin_data->pin_conf.input_en; 669 670 writel(val, (base_address + pin_data->pin_conf.offset)); 671 spin_unlock_irqrestore(&pinctrl->lock, flags); 672 673 dev_dbg(pctrldev->dev, "pin:%u set enable:%d\n", pin, enable); 674 return 0; 675 } 676 ns2_pin_get_enable(struct pinctrl_dev * pctrldev,unsigned int pin)677 static int ns2_pin_get_enable(struct pinctrl_dev *pctrldev, unsigned int pin) 678 { 679 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 680 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 681 unsigned long flags; 682 int enable; 683 684 spin_lock_irqsave(&pinctrl->lock, flags); 685 enable = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset); 686 enable = (enable >> pin_data->pin_conf.input_en) & 687 NS2_PIN_INPUT_EN_MASK; 688 spin_unlock_irqrestore(&pinctrl->lock, flags); 689 690 if (!enable) 691 enable = NS2_PIN_INPUT_EN_MASK; 692 else 693 enable = 0; 694 695 dev_dbg(pctrldev->dev, "pin:%u get disable:%d\n", pin, enable); 696 return enable; 697 } 698 ns2_pin_set_slew(struct pinctrl_dev * pctrldev,unsigned int pin,u32 slew)699 static int ns2_pin_set_slew(struct pinctrl_dev *pctrldev, unsigned int pin, 700 u32 slew) 701 { 702 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 703 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 704 unsigned long flags; 705 u32 val; 706 void __iomem *base_address; 707 708 base_address = pinctrl->pinconf_base; 709 spin_lock_irqsave(&pinctrl->lock, flags); 710 val = readl(base_address + pin_data->pin_conf.offset); 711 val &= ~(NS2_PIN_SRC_MASK << pin_data->pin_conf.src_shift); 712 713 if (slew) 714 val |= NS2_PIN_SRC_MASK << pin_data->pin_conf.src_shift; 715 716 writel(val, (base_address + pin_data->pin_conf.offset)); 717 spin_unlock_irqrestore(&pinctrl->lock, flags); 718 719 dev_dbg(pctrldev->dev, "pin:%u set slew:%d\n", pin, slew); 720 return 0; 721 } 722 ns2_pin_get_slew(struct pinctrl_dev * pctrldev,unsigned int pin,u16 * slew)723 static int ns2_pin_get_slew(struct pinctrl_dev *pctrldev, unsigned int pin, 724 u16 *slew) 725 { 726 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 727 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 728 unsigned long flags; 729 u32 val; 730 731 spin_lock_irqsave(&pinctrl->lock, flags); 732 val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset); 733 *slew = (val >> pin_data->pin_conf.src_shift) & NS2_PIN_SRC_MASK; 734 spin_unlock_irqrestore(&pinctrl->lock, flags); 735 736 dev_dbg(pctrldev->dev, "pin:%u get slew:%d\n", pin, *slew); 737 return 0; 738 } 739 ns2_pin_set_pull(struct pinctrl_dev * pctrldev,unsigned int pin,bool pull_up,bool pull_down)740 static int ns2_pin_set_pull(struct pinctrl_dev *pctrldev, unsigned int pin, 741 bool pull_up, bool pull_down) 742 { 743 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 744 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 745 unsigned long flags; 746 u32 val; 747 void __iomem *base_address; 748 749 base_address = pinctrl->pinconf_base; 750 spin_lock_irqsave(&pinctrl->lock, flags); 751 val = readl(base_address + pin_data->pin_conf.offset); 752 val &= ~(NS2_PIN_PULL_MASK << pin_data->pin_conf.pull_shift); 753 754 if (pull_up == true) 755 val |= NS2_PIN_PULL_UP << pin_data->pin_conf.pull_shift; 756 if (pull_down == true) 757 val |= NS2_PIN_PULL_DOWN << pin_data->pin_conf.pull_shift; 758 writel(val, (base_address + pin_data->pin_conf.offset)); 759 spin_unlock_irqrestore(&pinctrl->lock, flags); 760 761 dev_dbg(pctrldev->dev, "pin:%u set pullup:%d pulldown: %d\n", 762 pin, pull_up, pull_down); 763 return 0; 764 } 765 ns2_pin_get_pull(struct pinctrl_dev * pctrldev,unsigned int pin,bool * pull_up,bool * pull_down)766 static void ns2_pin_get_pull(struct pinctrl_dev *pctrldev, 767 unsigned int pin, bool *pull_up, 768 bool *pull_down) 769 { 770 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 771 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 772 unsigned long flags; 773 u32 val; 774 775 spin_lock_irqsave(&pinctrl->lock, flags); 776 val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset); 777 val = (val >> pin_data->pin_conf.pull_shift) & NS2_PIN_PULL_MASK; 778 *pull_up = false; 779 *pull_down = false; 780 781 if (val == NS2_PIN_PULL_UP) 782 *pull_up = true; 783 784 if (val == NS2_PIN_PULL_DOWN) 785 *pull_down = true; 786 spin_unlock_irqrestore(&pinctrl->lock, flags); 787 } 788 ns2_pin_set_strength(struct pinctrl_dev * pctrldev,unsigned int pin,u32 strength)789 static int ns2_pin_set_strength(struct pinctrl_dev *pctrldev, unsigned int pin, 790 u32 strength) 791 { 792 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 793 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 794 u32 val; 795 unsigned long flags; 796 void __iomem *base_address; 797 798 /* make sure drive strength is supported */ 799 if (strength < 2 || strength > 16 || (strength % 2)) 800 return -ENOTSUPP; 801 802 base_address = pinctrl->pinconf_base; 803 spin_lock_irqsave(&pinctrl->lock, flags); 804 val = readl(base_address + pin_data->pin_conf.offset); 805 val &= ~(NS2_PIN_DRIVE_STRENGTH_MASK << pin_data->pin_conf.drive_shift); 806 val |= ((strength / 2) - 1) << pin_data->pin_conf.drive_shift; 807 writel(val, (base_address + pin_data->pin_conf.offset)); 808 spin_unlock_irqrestore(&pinctrl->lock, flags); 809 810 dev_dbg(pctrldev->dev, "pin:%u set drive strength:%d mA\n", 811 pin, strength); 812 return 0; 813 } 814 ns2_pin_get_strength(struct pinctrl_dev * pctrldev,unsigned int pin,u16 * strength)815 static int ns2_pin_get_strength(struct pinctrl_dev *pctrldev, unsigned int pin, 816 u16 *strength) 817 { 818 struct ns2_pinctrl *pinctrl = pinctrl_dev_get_drvdata(pctrldev); 819 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 820 u32 val; 821 unsigned long flags; 822 823 spin_lock_irqsave(&pinctrl->lock, flags); 824 val = readl(pinctrl->pinconf_base + pin_data->pin_conf.offset); 825 *strength = (val >> pin_data->pin_conf.drive_shift) & 826 NS2_PIN_DRIVE_STRENGTH_MASK; 827 *strength = (*strength + 1) * 2; 828 spin_unlock_irqrestore(&pinctrl->lock, flags); 829 830 dev_dbg(pctrldev->dev, "pin:%u get drive strength:%d mA\n", 831 pin, *strength); 832 return 0; 833 } 834 ns2_pin_config_get(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * config)835 static int ns2_pin_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 836 unsigned long *config) 837 { 838 struct ns2_pin *pin_data = pctldev->desc->pins[pin].drv_data; 839 enum pin_config_param param = pinconf_to_config_param(*config); 840 bool pull_up, pull_down; 841 u16 arg = 0; 842 int ret; 843 844 if (pin_data->pin_conf.base == -1) 845 return -ENOTSUPP; 846 847 switch (param) { 848 case PIN_CONFIG_BIAS_DISABLE: 849 ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down); 850 if (!pull_up && !pull_down) 851 return 0; 852 else 853 return -EINVAL; 854 855 case PIN_CONFIG_BIAS_PULL_UP: 856 ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down); 857 if (pull_up) 858 return 0; 859 else 860 return -EINVAL; 861 862 case PIN_CONFIG_BIAS_PULL_DOWN: 863 ns2_pin_get_pull(pctldev, pin, &pull_up, &pull_down); 864 if (pull_down) 865 return 0; 866 else 867 return -EINVAL; 868 869 case PIN_CONFIG_DRIVE_STRENGTH: 870 ret = ns2_pin_get_strength(pctldev, pin, &arg); 871 if (ret) 872 return ret; 873 *config = pinconf_to_config_packed(param, arg); 874 return 0; 875 876 case PIN_CONFIG_SLEW_RATE: 877 ret = ns2_pin_get_slew(pctldev, pin, &arg); 878 if (ret) 879 return ret; 880 *config = pinconf_to_config_packed(param, arg); 881 return 0; 882 883 case PIN_CONFIG_INPUT_ENABLE: 884 ret = ns2_pin_get_enable(pctldev, pin); 885 if (ret) 886 return 0; 887 else 888 return -EINVAL; 889 890 default: 891 return -ENOTSUPP; 892 } 893 } 894 ns2_pin_config_set(struct pinctrl_dev * pctrldev,unsigned int pin,unsigned long * configs,unsigned int num_configs)895 static int ns2_pin_config_set(struct pinctrl_dev *pctrldev, unsigned int pin, 896 unsigned long *configs, unsigned int num_configs) 897 { 898 struct ns2_pin *pin_data = pctrldev->desc->pins[pin].drv_data; 899 enum pin_config_param param; 900 unsigned int i; 901 u32 arg; 902 int ret = -ENOTSUPP; 903 904 if (pin_data->pin_conf.base == -1) 905 return -ENOTSUPP; 906 907 for (i = 0; i < num_configs; i++) { 908 param = pinconf_to_config_param(configs[i]); 909 arg = pinconf_to_config_argument(configs[i]); 910 911 switch (param) { 912 case PIN_CONFIG_BIAS_DISABLE: 913 ret = ns2_pin_set_pull(pctrldev, pin, false, false); 914 if (ret < 0) 915 goto out; 916 break; 917 918 case PIN_CONFIG_BIAS_PULL_UP: 919 ret = ns2_pin_set_pull(pctrldev, pin, true, false); 920 if (ret < 0) 921 goto out; 922 break; 923 924 case PIN_CONFIG_BIAS_PULL_DOWN: 925 ret = ns2_pin_set_pull(pctrldev, pin, false, true); 926 if (ret < 0) 927 goto out; 928 break; 929 930 case PIN_CONFIG_DRIVE_STRENGTH: 931 ret = ns2_pin_set_strength(pctrldev, pin, arg); 932 if (ret < 0) 933 goto out; 934 break; 935 936 case PIN_CONFIG_SLEW_RATE: 937 ret = ns2_pin_set_slew(pctrldev, pin, arg); 938 if (ret < 0) 939 goto out; 940 break; 941 942 case PIN_CONFIG_INPUT_ENABLE: 943 ret = ns2_pin_set_enable(pctrldev, pin, arg); 944 if (ret < 0) 945 goto out; 946 break; 947 948 default: 949 dev_err(pctrldev->dev, "invalid configuration\n"); 950 return -ENOTSUPP; 951 } 952 } 953 out: 954 return ret; 955 } 956 static const struct pinmux_ops ns2_pinmux_ops = { 957 .get_functions_count = ns2_get_functions_count, 958 .get_function_name = ns2_get_function_name, 959 .get_function_groups = ns2_get_function_groups, 960 .set_mux = ns2_pinmux_enable, 961 }; 962 963 static const struct pinconf_ops ns2_pinconf_ops = { 964 .is_generic = true, 965 .pin_config_get = ns2_pin_config_get, 966 .pin_config_set = ns2_pin_config_set, 967 }; 968 969 static struct pinctrl_desc ns2_pinctrl_desc = { 970 .name = "ns2-pinmux", 971 .pctlops = &ns2_pinctrl_ops, 972 .pmxops = &ns2_pinmux_ops, 973 .confops = &ns2_pinconf_ops, 974 }; 975 ns2_mux_log_init(struct ns2_pinctrl * pinctrl)976 static int ns2_mux_log_init(struct ns2_pinctrl *pinctrl) 977 { 978 struct ns2_mux_log *log; 979 unsigned int i; 980 981 pinctrl->mux_log = devm_kcalloc(pinctrl->dev, NS2_NUM_IOMUX, 982 sizeof(struct ns2_mux_log), 983 GFP_KERNEL); 984 if (!pinctrl->mux_log) 985 return -ENOMEM; 986 987 for (i = 0; i < NS2_NUM_IOMUX; i++) 988 pinctrl->mux_log[i].is_configured = false; 989 /* Group 0 uses bit 31 in the IOMUX_PAD_FUNCTION_0 register */ 990 log = &pinctrl->mux_log[0]; 991 log->mux.base = NS2_PIN_MUX_BASE0; 992 log->mux.offset = 0; 993 log->mux.shift = 31; 994 log->mux.alt = 0; 995 996 /* 997 * Groups 1 through 14 use two bits each in the 998 * IOMUX_PAD_FUNCTION_1 register starting with 999 * bit position 30. 1000 */ 1001 for (i = 1; i < (NS2_NUM_IOMUX - NS2_NUM_PWM_MUX); i++) { 1002 log = &pinctrl->mux_log[i]; 1003 log->mux.base = NS2_PIN_MUX_BASE0; 1004 log->mux.offset = NS2_MUX_PAD_FUNC1_OFFSET; 1005 log->mux.shift = 32 - (i * 2); 1006 log->mux.alt = 0; 1007 } 1008 1009 /* 1010 * Groups 15 through 18 use one bit each in the 1011 * AUX_SEL register. 1012 */ 1013 for (i = 0; i < NS2_NUM_PWM_MUX; i++) { 1014 log = &pinctrl->mux_log[(NS2_NUM_IOMUX - NS2_NUM_PWM_MUX) + i]; 1015 log->mux.base = NS2_PIN_MUX_BASE1; 1016 log->mux.offset = 0; 1017 log->mux.shift = i; 1018 log->mux.alt = 0; 1019 } 1020 return 0; 1021 } 1022 ns2_pinmux_probe(struct platform_device * pdev)1023 static int ns2_pinmux_probe(struct platform_device *pdev) 1024 { 1025 struct ns2_pinctrl *pinctrl; 1026 struct resource *res; 1027 int i, ret; 1028 struct pinctrl_pin_desc *pins; 1029 unsigned int num_pins = ARRAY_SIZE(ns2_pins); 1030 1031 pinctrl = devm_kzalloc(&pdev->dev, sizeof(*pinctrl), GFP_KERNEL); 1032 if (!pinctrl) 1033 return -ENOMEM; 1034 1035 pinctrl->dev = &pdev->dev; 1036 platform_set_drvdata(pdev, pinctrl); 1037 spin_lock_init(&pinctrl->lock); 1038 1039 pinctrl->base0 = devm_platform_ioremap_resource(pdev, 0); 1040 if (IS_ERR(pinctrl->base0)) 1041 return PTR_ERR(pinctrl->base0); 1042 1043 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 1044 if (!res) 1045 return -EINVAL; 1046 pinctrl->base1 = devm_ioremap(&pdev->dev, res->start, 1047 resource_size(res)); 1048 if (!pinctrl->base1) { 1049 dev_err(&pdev->dev, "unable to map I/O space\n"); 1050 return -ENOMEM; 1051 } 1052 1053 pinctrl->pinconf_base = devm_platform_ioremap_resource(pdev, 2); 1054 if (IS_ERR(pinctrl->pinconf_base)) 1055 return PTR_ERR(pinctrl->pinconf_base); 1056 1057 ret = ns2_mux_log_init(pinctrl); 1058 if (ret) { 1059 dev_err(&pdev->dev, "unable to initialize IOMUX log\n"); 1060 return ret; 1061 } 1062 1063 pins = devm_kcalloc(&pdev->dev, num_pins, sizeof(*pins), GFP_KERNEL); 1064 if (!pins) 1065 return -ENOMEM; 1066 1067 for (i = 0; i < num_pins; i++) { 1068 pins[i].number = ns2_pins[i].pin; 1069 pins[i].name = ns2_pins[i].name; 1070 pins[i].drv_data = &ns2_pins[i]; 1071 } 1072 1073 pinctrl->groups = ns2_pin_groups; 1074 pinctrl->num_groups = ARRAY_SIZE(ns2_pin_groups); 1075 pinctrl->functions = ns2_pin_functions; 1076 pinctrl->num_functions = ARRAY_SIZE(ns2_pin_functions); 1077 ns2_pinctrl_desc.pins = pins; 1078 ns2_pinctrl_desc.npins = num_pins; 1079 1080 pinctrl->pctl = pinctrl_register(&ns2_pinctrl_desc, &pdev->dev, 1081 pinctrl); 1082 if (IS_ERR(pinctrl->pctl)) { 1083 dev_err(&pdev->dev, "unable to register IOMUX pinctrl\n"); 1084 return PTR_ERR(pinctrl->pctl); 1085 } 1086 1087 return 0; 1088 } 1089 1090 static const struct of_device_id ns2_pinmux_of_match[] = { 1091 {.compatible = "brcm,ns2-pinmux"}, 1092 { } 1093 }; 1094 1095 static struct platform_driver ns2_pinmux_driver = { 1096 .driver = { 1097 .name = "ns2-pinmux", 1098 .of_match_table = ns2_pinmux_of_match, 1099 }, 1100 .probe = ns2_pinmux_probe, 1101 }; 1102 ns2_pinmux_init(void)1103 static int __init ns2_pinmux_init(void) 1104 { 1105 return platform_driver_register(&ns2_pinmux_driver); 1106 } 1107 arch_initcall(ns2_pinmux_init); 1108