1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/arch/arm/mach-omap2/board-n8x0.c 4 * 5 * Copyright (C) 2005-2009 Nokia Corporation 6 * Author: Juha Yrjola <juha.yrjola@nokia.com> 7 * 8 * Modified from mach-omap2/board-generic.c 9 */ 10 11 #include <linux/clk.h> 12 #include <linux/delay.h> 13 #include <linux/gpio.h> 14 #include <linux/gpio/machine.h> 15 #include <linux/init.h> 16 #include <linux/io.h> 17 #include <linux/irq.h> 18 #include <linux/stddef.h> 19 #include <linux/i2c.h> 20 #include <linux/spi/spi.h> 21 #include <linux/usb/musb.h> 22 #include <linux/mmc/host.h> 23 #include <linux/platform_data/spi-omap2-mcspi.h> 24 #include <linux/platform_data/mmc-omap.h> 25 #include <linux/mfd/menelaus.h> 26 27 #include <asm/mach/arch.h> 28 #include <asm/mach-types.h> 29 30 #include "common.h" 31 #include "mmc.h" 32 #include "soc.h" 33 #include "common-board-devices.h" 34 35 #define TUSB6010_ASYNC_CS 1 36 #define TUSB6010_SYNC_CS 4 37 #define TUSB6010_GPIO_INT 58 38 #define TUSB6010_GPIO_ENABLE 0 39 #define TUSB6010_DMACHAN 0x3f 40 41 #define NOKIA_N810_WIMAX (1 << 2) 42 #define NOKIA_N810 (1 << 1) 43 #define NOKIA_N800 (1 << 0) 44 45 static u32 board_caps; 46 47 #define board_is_n800() (board_caps & NOKIA_N800) 48 #define board_is_n810() (board_caps & NOKIA_N810) 49 #define board_is_n810_wimax() (board_caps & NOKIA_N810_WIMAX) 50 51 static void board_check_revision(void) 52 { 53 if (of_machine_is_compatible("nokia,n800")) 54 board_caps = NOKIA_N800; 55 else if (of_machine_is_compatible("nokia,n810")) 56 board_caps = NOKIA_N810; 57 else if (of_machine_is_compatible("nokia,n810-wimax")) 58 board_caps = NOKIA_N810_WIMAX; 59 60 if (!board_caps) 61 pr_err("Unknown board\n"); 62 } 63 64 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010) 65 /* 66 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and 67 * 1.5 V voltage regulators of PM companion chip. Companion chip will then 68 * provide then PGOOD signal to TUSB6010 which will release it from reset. 69 */ 70 static int tusb_set_power(int state) 71 { 72 int i, retval = 0; 73 74 if (state) { 75 gpio_set_value(TUSB6010_GPIO_ENABLE, 1); 76 msleep(1); 77 78 /* Wait until TUSB6010 pulls INT pin down */ 79 i = 100; 80 while (i && gpio_get_value(TUSB6010_GPIO_INT)) { 81 msleep(1); 82 i--; 83 } 84 85 if (!i) { 86 printk(KERN_ERR "tusb: powerup failed\n"); 87 retval = -ENODEV; 88 } 89 } else { 90 gpio_set_value(TUSB6010_GPIO_ENABLE, 0); 91 msleep(10); 92 } 93 94 return retval; 95 } 96 97 static struct musb_hdrc_config musb_config = { 98 .multipoint = 1, 99 .dyn_fifo = 1, 100 .num_eps = 16, 101 .ram_bits = 12, 102 }; 103 104 static struct musb_hdrc_platform_data tusb_data = { 105 .mode = MUSB_OTG, 106 .set_power = tusb_set_power, 107 .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */ 108 .power = 100, /* Max 100 mA VBUS for host mode */ 109 .config = &musb_config, 110 }; 111 112 static void __init n8x0_usb_init(void) 113 { 114 int ret = 0; 115 static const char announce[] __initconst = KERN_INFO "TUSB 6010\n"; 116 117 /* PM companion chip power control pin */ 118 ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW, 119 "TUSB6010 enable"); 120 if (ret != 0) { 121 printk(KERN_ERR "Could not get TUSB power GPIO%i\n", 122 TUSB6010_GPIO_ENABLE); 123 return; 124 } 125 tusb_set_power(0); 126 127 ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2, 128 TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS, 129 TUSB6010_GPIO_INT, TUSB6010_DMACHAN); 130 if (ret != 0) 131 goto err; 132 133 printk(announce); 134 135 return; 136 137 err: 138 gpio_free(TUSB6010_GPIO_ENABLE); 139 } 140 #else 141 142 static void __init n8x0_usb_init(void) {} 143 144 #endif /*CONFIG_USB_MUSB_TUSB6010 */ 145 146 147 static struct omap2_mcspi_device_config p54spi_mcspi_config = { 148 .turbo_mode = 0, 149 }; 150 151 static struct spi_board_info n800_spi_board_info[] __initdata = { 152 { 153 .modalias = "p54spi", 154 .bus_num = 2, 155 .chip_select = 0, 156 .max_speed_hz = 48000000, 157 .controller_data = &p54spi_mcspi_config, 158 }, 159 }; 160 161 #if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP) 162 163 /* 164 * On both N800 and N810, only the first of the two MMC controllers is in use. 165 * The two MMC slots are multiplexed via Menelaus companion chip over I2C. 166 * On N800, both slots are powered via Menelaus. On N810, only one of the 167 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO. 168 * 169 * VMMC slot 1 on both N800 and N810 170 * VDCDC3_APE and VMCS2_APE slot 2 on N800 171 * GPIO23 and GPIO9 slot 2 EMMC on N810 172 * 173 */ 174 static int slot1_cover_open; 175 static int slot2_cover_open; 176 static struct device *mmc_device; 177 178 static struct gpiod_lookup_table nokia8xx_mmc_gpio_table = { 179 .dev_id = "mmci-omap.0", 180 .table = { 181 /* Slot switch, GPIO 96 */ 182 GPIO_LOOKUP("gpio-80-111", 16, 183 "switch", GPIO_ACTIVE_HIGH), 184 { } 185 }, 186 }; 187 188 static struct gpiod_lookup_table nokia810_mmc_gpio_table = { 189 .dev_id = "mmci-omap.0", 190 .table = { 191 /* Slot index 1, VSD power, GPIO 23 */ 192 GPIO_LOOKUP_IDX("gpio-16-31", 7, 193 "vsd", 1, GPIO_ACTIVE_HIGH), 194 /* Slot index 1, VIO power, GPIO 9 */ 195 GPIO_LOOKUP_IDX("gpio-0-15", 9, 196 "vsd", 1, GPIO_ACTIVE_HIGH), 197 { } 198 }, 199 }; 200 201 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot, 202 int power_on, int vdd) 203 { 204 int mV; 205 206 #ifdef CONFIG_MMC_DEBUG 207 dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1, 208 power_on ? "on" : "off", vdd); 209 #endif 210 if (slot == 0) { 211 if (!power_on) 212 return menelaus_set_vmmc(0); 213 switch (1 << vdd) { 214 case MMC_VDD_33_34: 215 case MMC_VDD_32_33: 216 case MMC_VDD_31_32: 217 mV = 3100; 218 break; 219 case MMC_VDD_30_31: 220 mV = 3000; 221 break; 222 case MMC_VDD_28_29: 223 mV = 2800; 224 break; 225 case MMC_VDD_165_195: 226 mV = 1850; 227 break; 228 default: 229 BUG(); 230 } 231 return menelaus_set_vmmc(mV); 232 } else { 233 if (!power_on) 234 return menelaus_set_vdcdc(3, 0); 235 switch (1 << vdd) { 236 case MMC_VDD_33_34: 237 case MMC_VDD_32_33: 238 mV = 3300; 239 break; 240 case MMC_VDD_30_31: 241 case MMC_VDD_29_30: 242 mV = 3000; 243 break; 244 case MMC_VDD_28_29: 245 case MMC_VDD_27_28: 246 mV = 2800; 247 break; 248 case MMC_VDD_24_25: 249 case MMC_VDD_23_24: 250 mV = 2400; 251 break; 252 case MMC_VDD_22_23: 253 case MMC_VDD_21_22: 254 mV = 2200; 255 break; 256 case MMC_VDD_20_21: 257 mV = 2000; 258 break; 259 case MMC_VDD_165_195: 260 mV = 1800; 261 break; 262 default: 263 BUG(); 264 } 265 return menelaus_set_vdcdc(3, mV); 266 } 267 return 0; 268 } 269 270 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on, 271 int vdd) 272 { 273 if (board_is_n800() || slot == 0) 274 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd); 275 276 /* The n810 power will be handled by GPIO code in the driver */ 277 278 return 0; 279 } 280 281 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode) 282 { 283 int r; 284 285 dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1, 286 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull"); 287 BUG_ON(slot != 0 && slot != 1); 288 slot++; 289 switch (bus_mode) { 290 case MMC_BUSMODE_OPENDRAIN: 291 r = menelaus_set_mmc_opendrain(slot, 1); 292 break; 293 case MMC_BUSMODE_PUSHPULL: 294 r = menelaus_set_mmc_opendrain(slot, 0); 295 break; 296 default: 297 BUG(); 298 } 299 if (r != 0 && printk_ratelimit()) 300 dev_err(dev, "MMC: unable to set bus mode for slot %d\n", 301 slot); 302 return r; 303 } 304 305 static int n8x0_mmc_get_cover_state(struct device *dev, int slot) 306 { 307 slot++; 308 BUG_ON(slot != 1 && slot != 2); 309 if (slot == 1) 310 return slot1_cover_open; 311 else 312 return slot2_cover_open; 313 } 314 315 static void n8x0_mmc_callback(void *data, u8 card_mask) 316 { 317 #ifdef CONFIG_MMC_OMAP 318 int bit, *openp, index; 319 320 if (board_is_n800()) { 321 bit = 1 << 1; 322 openp = &slot2_cover_open; 323 index = 1; 324 } else { 325 bit = 1; 326 openp = &slot1_cover_open; 327 index = 0; 328 } 329 330 if (card_mask & bit) 331 *openp = 1; 332 else 333 *openp = 0; 334 335 omap_mmc_notify_cover_event(mmc_device, index, *openp); 336 #else 337 pr_warn("MMC: notify cover event not available\n"); 338 #endif 339 } 340 341 static int n8x0_mmc_late_init(struct device *dev) 342 { 343 int r, bit, *openp; 344 int vs2sel; 345 346 mmc_device = dev; 347 348 r = menelaus_set_slot_sel(1); 349 if (r < 0) 350 return r; 351 352 if (board_is_n800()) 353 vs2sel = 0; 354 else 355 vs2sel = 2; 356 357 r = menelaus_set_mmc_slot(2, 0, vs2sel, 1); 358 if (r < 0) 359 return r; 360 361 n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */ 362 n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16); 363 364 r = menelaus_set_mmc_slot(1, 1, 0, 1); 365 if (r < 0) 366 return r; 367 r = menelaus_set_mmc_slot(2, 1, vs2sel, 1); 368 if (r < 0) 369 return r; 370 371 r = menelaus_get_slot_pin_states(); 372 if (r < 0) 373 return r; 374 375 if (board_is_n800()) { 376 bit = 1 << 1; 377 openp = &slot2_cover_open; 378 } else { 379 bit = 1; 380 openp = &slot1_cover_open; 381 slot2_cover_open = 0; 382 } 383 384 /* All slot pin bits seem to be inversed until first switch change */ 385 if (r == 0xf || r == (0xf & ~bit)) 386 r = ~r; 387 388 if (r & bit) 389 *openp = 1; 390 else 391 *openp = 0; 392 393 r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL); 394 395 return r; 396 } 397 398 static void n8x0_mmc_shutdown(struct device *dev) 399 { 400 int vs2sel; 401 402 if (board_is_n800()) 403 vs2sel = 0; 404 else 405 vs2sel = 2; 406 407 menelaus_set_mmc_slot(1, 0, 0, 0); 408 menelaus_set_mmc_slot(2, 0, vs2sel, 0); 409 } 410 411 static void n8x0_mmc_cleanup(struct device *dev) 412 { 413 menelaus_unregister_mmc_callback(); 414 } 415 416 /* 417 * MMC controller1 has two slots that are multiplexed via I2C. 418 * MMC controller2 is not in use. 419 */ 420 static struct omap_mmc_platform_data mmc1_data = { 421 .nr_slots = 0, 422 .init = n8x0_mmc_late_init, 423 .cleanup = n8x0_mmc_cleanup, 424 .shutdown = n8x0_mmc_shutdown, 425 .max_freq = 24000000, 426 .slots[0] = { 427 .wires = 4, 428 .set_power = n8x0_mmc_set_power, 429 .set_bus_mode = n8x0_mmc_set_bus_mode, 430 .get_cover_state = n8x0_mmc_get_cover_state, 431 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 | 432 MMC_VDD_32_33 | MMC_VDD_33_34, 433 .name = "internal", 434 }, 435 .slots[1] = { 436 .set_power = n8x0_mmc_set_power, 437 .set_bus_mode = n8x0_mmc_set_bus_mode, 438 .get_cover_state = n8x0_mmc_get_cover_state, 439 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 | 440 MMC_VDD_21_22 | MMC_VDD_22_23 | 441 MMC_VDD_23_24 | MMC_VDD_24_25 | 442 MMC_VDD_27_28 | MMC_VDD_28_29 | 443 MMC_VDD_29_30 | MMC_VDD_30_31 | 444 MMC_VDD_32_33 | MMC_VDD_33_34, 445 .name = "external", 446 }, 447 }; 448 449 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC]; 450 451 static void __init n8x0_mmc_init(void) 452 { 453 gpiod_add_lookup_table(&nokia8xx_mmc_gpio_table); 454 455 if (board_is_n810()) { 456 mmc1_data.slots[0].name = "external"; 457 458 /* 459 * Some Samsung Movinand chips do not like open-ended 460 * multi-block reads and fall to braind-dead state 461 * while doing so. Reducing the number of blocks in 462 * the transfer or delays in clock disable do not help 463 */ 464 mmc1_data.slots[1].name = "internal"; 465 mmc1_data.slots[1].ban_openended = 1; 466 gpiod_add_lookup_table(&nokia810_mmc_gpio_table); 467 } 468 469 mmc1_data.nr_slots = 2; 470 mmc_data[0] = &mmc1_data; 471 } 472 #else 473 static struct omap_mmc_platform_data mmc1_data; 474 static void __init n8x0_mmc_init(void) 475 { 476 } 477 #endif /* CONFIG_MMC_OMAP */ 478 479 #ifdef CONFIG_MENELAUS 480 481 static int n8x0_auto_sleep_regulators(void) 482 { 483 u32 val; 484 int ret; 485 486 val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \ 487 | EN_VAUX_SLEEP | EN_VIO_SLEEP \ 488 | EN_VMEM_SLEEP | EN_DC3_SLEEP \ 489 | EN_VC_SLEEP | EN_DC2_SLEEP; 490 491 ret = menelaus_set_regulator_sleep(1, val); 492 if (ret < 0) { 493 pr_err("Could not set regulators to sleep on menelaus: %u\n", 494 ret); 495 return ret; 496 } 497 return 0; 498 } 499 500 static int n8x0_auto_voltage_scale(void) 501 { 502 int ret; 503 504 ret = menelaus_set_vcore_hw(1400, 1050); 505 if (ret < 0) { 506 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret); 507 return ret; 508 } 509 return 0; 510 } 511 512 static int n8x0_menelaus_late_init(struct device *dev) 513 { 514 int ret; 515 516 ret = n8x0_auto_voltage_scale(); 517 if (ret < 0) 518 return ret; 519 ret = n8x0_auto_sleep_regulators(); 520 if (ret < 0) 521 return ret; 522 return 0; 523 } 524 525 #else 526 static int n8x0_menelaus_late_init(struct device *dev) 527 { 528 return 0; 529 } 530 #endif 531 532 struct menelaus_platform_data n8x0_menelaus_platform_data = { 533 .late_init = n8x0_menelaus_late_init, 534 }; 535 536 static int __init n8x0_late_initcall(void) 537 { 538 if (!board_caps) 539 return -ENODEV; 540 541 n8x0_mmc_init(); 542 n8x0_usb_init(); 543 544 return 0; 545 } 546 omap_late_initcall(n8x0_late_initcall); 547 548 /* 549 * Legacy init pdata init for n8x0. Note that we want to follow the 550 * I2C bus numbering starting at 0 for device tree like other omaps. 551 */ 552 void * __init n8x0_legacy_init(void) 553 { 554 board_check_revision(); 555 spi_register_board_info(n800_spi_board_info, 556 ARRAY_SIZE(n800_spi_board_info)); 557 return &mmc1_data; 558 } 559