1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/arch/arm/mach-sa1100/assabet.c 4 * 5 * Author: Nicolas Pitre 6 * 7 * This file contains all Assabet-specific tweaks. 8 */ 9 #include <linux/init.h> 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/errno.h> 13 #include <linux/gpio/gpio-reg.h> 14 #include <linux/gpio/machine.h> 15 #include <linux/gpio_keys.h> 16 #include <linux/ioport.h> 17 #include <linux/platform_data/sa11x0-serial.h> 18 #include <linux/regulator/fixed.h> 19 #include <linux/regulator/machine.h> 20 #include <linux/serial_core.h> 21 #include <linux/platform_device.h> 22 #include <linux/mfd/ucb1x00.h> 23 #include <linux/mtd/mtd.h> 24 #include <linux/mtd/partitions.h> 25 #include <linux/delay.h> 26 #include <linux/mm.h> 27 #include <linux/leds.h> 28 #include <linux/slab.h> 29 30 #include <video/sa1100fb.h> 31 32 #include <mach/hardware.h> 33 #include <asm/mach-types.h> 34 #include <asm/setup.h> 35 #include <asm/page.h> 36 #include <asm/pgtable-hwdef.h> 37 #include <asm/tlbflush.h> 38 39 #include <asm/mach/arch.h> 40 #include <asm/mach/flash.h> 41 #include <linux/platform_data/irda-sa11x0.h> 42 #include <asm/mach/map.h> 43 #include <mach/assabet.h> 44 #include <linux/platform_data/mfd-mcp-sa11x0.h> 45 #include <mach/irqs.h> 46 47 #include "generic.h" 48 49 #define ASSABET_BCR_DB1110 \ 50 (ASSABET_BCR_SPK_OFF | \ 51 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \ 52 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \ 53 ASSABET_BCR_IRDA_MD0) 54 55 #define ASSABET_BCR_DB1111 \ 56 (ASSABET_BCR_SPK_OFF | \ 57 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \ 58 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \ 59 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \ 60 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST) 61 62 unsigned long SCR_value = ASSABET_SCR_INIT; 63 EXPORT_SYMBOL(SCR_value); 64 65 static struct gpio_chip *assabet_bcr_gc; 66 67 static const char *assabet_names[] = { 68 "cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel", 69 "irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on", 70 "audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on", 71 "rs232_on", "nred_led", "ngreen_led", "vib_on", 72 "com_dtr", "com_rts", "radio_wake_mod", "i2c_enab", 73 "tvir_enab", "qmute", "radio_pwr_on", "spkr_off", 74 "rs232_valid", "com_dcd", "com_cts", "com_dsr", 75 "radio_cts", "radio_dsr", "radio_dcd", "radio_ri", 76 }; 77 78 /* The old deprecated interface */ 79 void ASSABET_BCR_frob(unsigned int mask, unsigned int val) 80 { 81 unsigned long m = mask, v = val; 82 83 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v); 84 } 85 EXPORT_SYMBOL(ASSABET_BCR_frob); 86 87 static void __init assabet_init_gpio(void __iomem *reg, u32 def_val) 88 { 89 struct gpio_chip *gc; 90 91 writel_relaxed(def_val, reg); 92 93 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val, 94 assabet_names, NULL, NULL); 95 96 if (IS_ERR(gc)) 97 return; 98 99 assabet_bcr_gc = gc; 100 } 101 102 /* 103 * The codec reset goes to three devices, so we need to release 104 * the rest when any one of these requests it. However, that 105 * causes the ADV7171 to consume around 100mA - more than half 106 * the LCD-blanked power. 107 * 108 * With the ADV7171, LCD and backlight enabled, we go over 109 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery 110 * is connected, the Assabet crashes. 111 */ 112 #define RST_UCB1X00 (1 << 0) 113 #define RST_UDA1341 (1 << 1) 114 #define RST_ADV7171 (1 << 2) 115 116 #define SDA GPIO_GPIO(15) 117 #define SCK GPIO_GPIO(18) 118 #define MOD GPIO_GPIO(17) 119 120 static void adv7171_start(void) 121 { 122 GPSR = SCK; 123 udelay(1); 124 GPSR = SDA; 125 udelay(2); 126 GPCR = SDA; 127 } 128 129 static void adv7171_stop(void) 130 { 131 GPSR = SCK; 132 udelay(2); 133 GPSR = SDA; 134 udelay(1); 135 } 136 137 static void adv7171_send(unsigned byte) 138 { 139 unsigned i; 140 141 for (i = 0; i < 8; i++, byte <<= 1) { 142 GPCR = SCK; 143 udelay(1); 144 if (byte & 0x80) 145 GPSR = SDA; 146 else 147 GPCR = SDA; 148 udelay(1); 149 GPSR = SCK; 150 udelay(1); 151 } 152 GPCR = SCK; 153 udelay(1); 154 GPSR = SDA; 155 udelay(1); 156 GPDR &= ~SDA; 157 GPSR = SCK; 158 udelay(1); 159 if (GPLR & SDA) 160 printk(KERN_WARNING "No ACK from ADV7171\n"); 161 udelay(1); 162 GPCR = SCK | SDA; 163 udelay(1); 164 GPDR |= SDA; 165 udelay(1); 166 } 167 168 static void adv7171_write(unsigned reg, unsigned val) 169 { 170 unsigned gpdr = GPDR; 171 unsigned gplr = GPLR; 172 173 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON); 174 udelay(100); 175 176 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */ 177 GPDR = (GPDR | SCK | MOD) & ~SDA; 178 udelay(10); 179 if (!(GPLR & SDA)) 180 printk(KERN_WARNING "Something dragging SDA down?\n"); 181 GPDR |= SDA; 182 183 adv7171_start(); 184 adv7171_send(0x54); 185 adv7171_send(reg); 186 adv7171_send(val); 187 adv7171_stop(); 188 189 /* Restore GPIO state for L3 bus */ 190 GPSR = gplr & (SDA | SCK | MOD); 191 GPCR = (~gplr) & (SDA | SCK | MOD); 192 GPDR = gpdr; 193 } 194 195 static void adv7171_sleep(void) 196 { 197 /* Put the ADV7171 into sleep mode */ 198 adv7171_write(0x04, 0x40); 199 } 200 201 static unsigned codec_nreset; 202 203 static void assabet_codec_reset(unsigned mask, int set) 204 { 205 unsigned long flags; 206 bool old; 207 208 local_irq_save(flags); 209 old = !codec_nreset; 210 if (set) 211 codec_nreset &= ~mask; 212 else 213 codec_nreset |= mask; 214 215 if (old != !codec_nreset) { 216 if (codec_nreset) { 217 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST); 218 adv7171_sleep(); 219 } else { 220 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST); 221 } 222 } 223 local_irq_restore(flags); 224 } 225 226 static void assabet_ucb1x00_reset(enum ucb1x00_reset state) 227 { 228 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND || 229 state == UCB_RST_PROBE_FAIL; 230 assabet_codec_reset(RST_UCB1X00, set); 231 } 232 233 void assabet_uda1341_reset(int set) 234 { 235 assabet_codec_reset(RST_UDA1341, set); 236 } 237 EXPORT_SYMBOL(assabet_uda1341_reset); 238 239 240 /* 241 * Assabet flash support code. 242 */ 243 244 #ifdef ASSABET_REV_4 245 /* 246 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0: 247 */ 248 static struct mtd_partition assabet_partitions[] = { 249 { 250 .name = "bootloader", 251 .size = 0x00020000, 252 .offset = 0, 253 .mask_flags = MTD_WRITEABLE, 254 }, { 255 .name = "bootloader params", 256 .size = 0x00020000, 257 .offset = MTDPART_OFS_APPEND, 258 .mask_flags = MTD_WRITEABLE, 259 }, { 260 .name = "jffs", 261 .size = MTDPART_SIZ_FULL, 262 .offset = MTDPART_OFS_APPEND, 263 } 264 }; 265 #else 266 /* 267 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0: 268 */ 269 static struct mtd_partition assabet_partitions[] = { 270 { 271 .name = "bootloader", 272 .size = 0x00040000, 273 .offset = 0, 274 .mask_flags = MTD_WRITEABLE, 275 }, { 276 .name = "bootloader params", 277 .size = 0x00040000, 278 .offset = MTDPART_OFS_APPEND, 279 .mask_flags = MTD_WRITEABLE, 280 }, { 281 .name = "jffs", 282 .size = MTDPART_SIZ_FULL, 283 .offset = MTDPART_OFS_APPEND, 284 } 285 }; 286 #endif 287 288 static struct flash_platform_data assabet_flash_data = { 289 .map_name = "cfi_probe", 290 .parts = assabet_partitions, 291 .nr_parts = ARRAY_SIZE(assabet_partitions), 292 }; 293 294 static struct resource assabet_flash_resources[] = { 295 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M), 296 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M), 297 }; 298 299 300 /* 301 * Assabet IrDA support code. 302 */ 303 304 static int assabet_irda_set_power(struct device *dev, unsigned int state) 305 { 306 static unsigned int bcr_state[4] = { 307 ASSABET_BCR_IRDA_MD0, 308 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0, 309 ASSABET_BCR_IRDA_MD1, 310 0 311 }; 312 313 if (state < 4) 314 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0, 315 bcr_state[state]); 316 return 0; 317 } 318 319 static void assabet_irda_set_speed(struct device *dev, unsigned int speed) 320 { 321 if (speed < 4000000) 322 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL); 323 else 324 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL); 325 } 326 327 static struct irda_platform_data assabet_irda_data = { 328 .set_power = assabet_irda_set_power, 329 .set_speed = assabet_irda_set_speed, 330 }; 331 332 static struct ucb1x00_plat_data assabet_ucb1x00_data = { 333 .reset = assabet_ucb1x00_reset, 334 .gpio_base = -1, 335 .can_wakeup = 1, 336 }; 337 338 static struct mcp_plat_data assabet_mcp_data = { 339 .mccr0 = MCCR0_ADM, 340 .sclk_rate = 11981000, 341 .codec_pdata = &assabet_ucb1x00_data, 342 }; 343 344 static void assabet_lcd_set_visual(u32 visual) 345 { 346 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR; 347 348 if (machine_is_assabet()) { 349 #if 1 // phase 4 or newer Assabet's 350 if (is_true_color) 351 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB); 352 else 353 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB); 354 #else 355 // older Assabet's 356 if (is_true_color) 357 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB); 358 else 359 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB); 360 #endif 361 } 362 } 363 364 #ifndef ASSABET_PAL_VIDEO 365 static void assabet_lcd_backlight_power(int on) 366 { 367 if (on) 368 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON); 369 else 370 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON); 371 } 372 373 /* 374 * Turn on/off the backlight. When turning the backlight on, we wait 375 * 500us after turning it on so we don't cause the supplies to droop 376 * when we enable the LCD controller (and cause a hard reset.) 377 */ 378 static void assabet_lcd_power(int on) 379 { 380 if (on) { 381 ASSABET_BCR_set(ASSABET_BCR_LCD_ON); 382 udelay(500); 383 } else 384 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON); 385 } 386 387 /* 388 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually 389 * takes an RGB666 signal, but we provide it with an RGB565 signal 390 * instead (def_rgb_16). 391 */ 392 static struct sa1100fb_mach_info lq039q2ds54_info = { 393 .pixclock = 171521, .bpp = 16, 394 .xres = 320, .yres = 240, 395 396 .hsync_len = 5, .vsync_len = 1, 397 .left_margin = 61, .upper_margin = 3, 398 .right_margin = 9, .lower_margin = 0, 399 400 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 401 402 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act, 403 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2), 404 405 .backlight_power = assabet_lcd_backlight_power, 406 .lcd_power = assabet_lcd_power, 407 .set_visual = assabet_lcd_set_visual, 408 }; 409 #else 410 static void assabet_pal_backlight_power(int on) 411 { 412 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON); 413 } 414 415 static void assabet_pal_power(int on) 416 { 417 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON); 418 } 419 420 static struct sa1100fb_mach_info pal_info = { 421 .pixclock = 67797, .bpp = 16, 422 .xres = 640, .yres = 512, 423 424 .hsync_len = 64, .vsync_len = 6, 425 .left_margin = 125, .upper_margin = 70, 426 .right_margin = 115, .lower_margin = 36, 427 428 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act, 429 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512), 430 431 .backlight_power = assabet_pal_backlight_power, 432 .lcd_power = assabet_pal_power, 433 .set_visual = assabet_lcd_set_visual, 434 }; 435 #endif 436 437 #ifdef CONFIG_ASSABET_NEPONSET 438 static struct resource neponset_resources[] = { 439 DEFINE_RES_MEM(0x10000000, 0x08000000), 440 DEFINE_RES_MEM(0x18000000, 0x04000000), 441 DEFINE_RES_MEM(0x40000000, SZ_8K), 442 DEFINE_RES_IRQ(IRQ_GPIO25), 443 }; 444 #endif 445 446 static struct gpiod_lookup_table assabet_cf_gpio_table = { 447 .dev_id = "sa11x0-pcmcia.1", 448 .table = { 449 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH), 450 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW), 451 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH), 452 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH), 453 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH), 454 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW), 455 { }, 456 }, 457 }; 458 459 static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = { 460 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"), 461 }; 462 463 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = { 464 .supply_name = "cf-power", 465 .microvolts = 3300000, 466 }; 467 468 static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = { 469 .dev_id = "reg-fixed-voltage.0", 470 .table = { 471 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH), 472 { }, 473 }, 474 }; 475 476 static struct gpiod_lookup_table assabet_leds_gpio_table = { 477 .dev_id = "leds-gpio", 478 .table = { 479 GPIO_LOOKUP("assabet", 13, NULL, GPIO_ACTIVE_LOW), 480 GPIO_LOOKUP("assabet", 14, NULL, GPIO_ACTIVE_LOW), 481 { }, 482 }, 483 }; 484 485 static struct gpio_led assabet_leds[] __initdata = { 486 { 487 .name = "assabet:red", 488 .default_trigger = "cpu0", 489 .default_state = LEDS_GPIO_DEFSTATE_KEEP, 490 }, { 491 .name = "assabet:green", 492 .default_trigger = "heartbeat", 493 .default_state = LEDS_GPIO_DEFSTATE_KEEP, 494 }, 495 }; 496 497 static const struct gpio_led_platform_data assabet_leds_pdata __initconst = { 498 .num_leds = ARRAY_SIZE(assabet_leds), 499 .leds = assabet_leds, 500 }; 501 502 static struct gpio_keys_button assabet_keys_buttons[] = { 503 { 504 .gpio = 0, 505 .irq = IRQ_GPIO0, 506 .desc = "gpio0", 507 .wakeup = 1, 508 .can_disable = 1, 509 .debounce_interval = 5, 510 }, { 511 .gpio = 1, 512 .irq = IRQ_GPIO1, 513 .desc = "gpio1", 514 .wakeup = 1, 515 .can_disable = 1, 516 .debounce_interval = 5, 517 }, 518 }; 519 520 static const struct gpio_keys_platform_data assabet_keys_pdata = { 521 .buttons = assabet_keys_buttons, 522 .nbuttons = ARRAY_SIZE(assabet_keys_buttons), 523 .rep = 0, 524 }; 525 526 static struct gpiod_lookup_table assabet_uart1_gpio_table = { 527 .dev_id = "sa11x0-uart.1", 528 .table = { 529 GPIO_LOOKUP("assabet", 16, "dtr", GPIO_ACTIVE_LOW), 530 GPIO_LOOKUP("assabet", 17, "rts", GPIO_ACTIVE_LOW), 531 GPIO_LOOKUP("assabet", 25, "dcd", GPIO_ACTIVE_LOW), 532 GPIO_LOOKUP("assabet", 26, "cts", GPIO_ACTIVE_LOW), 533 GPIO_LOOKUP("assabet", 27, "dsr", GPIO_ACTIVE_LOW), 534 { }, 535 }, 536 }; 537 538 static struct gpiod_lookup_table assabet_uart3_gpio_table = { 539 .dev_id = "sa11x0-uart.3", 540 .table = { 541 GPIO_LOOKUP("assabet", 28, "cts", GPIO_ACTIVE_LOW), 542 GPIO_LOOKUP("assabet", 29, "dsr", GPIO_ACTIVE_LOW), 543 GPIO_LOOKUP("assabet", 30, "dcd", GPIO_ACTIVE_LOW), 544 GPIO_LOOKUP("assabet", 31, "rng", GPIO_ACTIVE_LOW), 545 { }, 546 }, 547 }; 548 549 static void __init assabet_init(void) 550 { 551 /* 552 * Ensure that the power supply is in "high power" mode. 553 */ 554 GPSR = GPIO_GPIO16; 555 GPDR |= GPIO_GPIO16; 556 557 /* 558 * Ensure that these pins are set as outputs and are driving 559 * logic 0. This ensures that we won't inadvertently toggle 560 * the WS latch in the CPLD, and we don't float causing 561 * excessive power drain. --rmk 562 */ 563 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; 564 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; 565 566 /* 567 * Also set GPIO27 as an output; this is used to clock UART3 568 * via the FPGA and as otherwise has no pullups or pulldowns, 569 * so stop it floating. 570 */ 571 GPCR = GPIO_GPIO27; 572 GPDR |= GPIO_GPIO27; 573 574 /* 575 * Set up registers for sleep mode. 576 */ 577 PWER = PWER_GPIO0; 578 PGSR = 0; 579 PCFR = 0; 580 PSDR = 0; 581 PPDR |= PPC_TXD3 | PPC_TXD1; 582 PPSR |= PPC_TXD3 | PPC_TXD1; 583 584 sa11x0_ppc_configure_mcp(); 585 586 if (machine_has_neponset()) { 587 #ifndef CONFIG_ASSABET_NEPONSET 588 printk( "Warning: Neponset detected but full support " 589 "hasn't been configured in the kernel\n" ); 590 #else 591 platform_device_register_simple("neponset", 0, 592 neponset_resources, ARRAY_SIZE(neponset_resources)); 593 #endif 594 } else { 595 gpiod_add_lookup_table(&assabet_uart1_gpio_table); 596 gpiod_add_lookup_table(&assabet_uart3_gpio_table); 597 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table); 598 599 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata, 600 assabet_cf_vcc_consumers, 601 ARRAY_SIZE(assabet_cf_vcc_consumers), 602 true); 603 604 } 605 606 platform_device_register_resndata(NULL, "gpio-keys", 0, 607 NULL, 0, 608 &assabet_keys_pdata, 609 sizeof(assabet_keys_pdata)); 610 611 gpiod_add_lookup_table(&assabet_leds_gpio_table); 612 gpio_led_register_device(-1, &assabet_leds_pdata); 613 614 #ifndef ASSABET_PAL_VIDEO 615 sa11x0_register_lcd(&lq039q2ds54_info); 616 #else 617 sa11x0_register_lcd(&pal_video); 618 #endif 619 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources, 620 ARRAY_SIZE(assabet_flash_resources)); 621 sa11x0_register_irda(&assabet_irda_data); 622 sa11x0_register_mcp(&assabet_mcp_data); 623 624 if (!machine_has_neponset()) 625 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table); 626 } 627 628 /* 629 * On Assabet, we must probe for the Neponset board _before_ 630 * paging_init() has occurred to actually determine the amount 631 * of RAM available. To do so, we map the appropriate IO section 632 * in the page table here in order to access GPIO registers. 633 */ 634 static void __init map_sa1100_gpio_regs( void ) 635 { 636 unsigned long phys = __PREG(GPLR) & PMD_MASK; 637 unsigned long virt = (unsigned long)io_p2v(phys); 638 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO); 639 pmd_t *pmd; 640 641 pmd = pmd_off_k(virt); 642 *pmd = __pmd(phys | prot); 643 flush_pmd_entry(pmd); 644 } 645 646 /* 647 * Read System Configuration "Register" 648 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board 649 * User's Guide", section 4.4.1) 650 * 651 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S 652 * to set up the serial port for decompression status messages. We 653 * repeat it here because the kernel may not be loaded as a zImage, and 654 * also because it's a hassle to communicate the SCR value to the kernel 655 * from the decompressor. 656 * 657 * Note that IRQs are guaranteed to be disabled. 658 */ 659 static void __init get_assabet_scr(void) 660 { 661 unsigned long scr, i; 662 663 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */ 664 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */ 665 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */ 666 for(i = 100; i--; ) /* Read GPIO 9:2 */ 667 scr = GPLR; 668 GPDR |= 0x3fc; /* restore correct pin direction */ 669 scr &= 0x3fc; /* save as system configuration byte. */ 670 SCR_value = scr; 671 } 672 673 static void __init 674 fixup_assabet(struct tag *tags, char **cmdline) 675 { 676 /* This must be done before any call to machine_has_neponset() */ 677 map_sa1100_gpio_regs(); 678 get_assabet_scr(); 679 680 if (machine_has_neponset()) 681 printk("Neponset expansion board detected\n"); 682 } 683 684 685 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 686 { 687 if (port->mapbase == _Ser1UTCR0) { 688 if (state) 689 ASSABET_BCR_clear(ASSABET_BCR_RS232EN); 690 else 691 ASSABET_BCR_set(ASSABET_BCR_RS232EN); 692 } 693 } 694 695 static struct sa1100_port_fns assabet_port_fns __initdata = { 696 .pm = assabet_uart_pm, 697 }; 698 699 static struct map_desc assabet_io_desc[] __initdata = { 700 { /* Board Control Register */ 701 .virtual = 0xf1000000, 702 .pfn = __phys_to_pfn(0x12000000), 703 .length = 0x00100000, 704 .type = MT_DEVICE 705 }, { /* MQ200 */ 706 .virtual = 0xf2800000, 707 .pfn = __phys_to_pfn(0x4b800000), 708 .length = 0x00800000, 709 .type = MT_DEVICE 710 } 711 }; 712 713 static void __init assabet_map_io(void) 714 { 715 sa1100_map_io(); 716 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc)); 717 718 /* 719 * Set SUS bit in SDCR0 so serial port 1 functions. 720 * Its called GPCLKR0 in my SA1110 manual. 721 */ 722 Ser1SDCR0 |= SDCR0_SUS; 723 MSC1 = (MSC1 & ~0xffff) | 724 MSC_NonBrst | MSC_32BitStMem | 725 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0); 726 727 if (!machine_has_neponset()) 728 sa1100_register_uart_fns(&assabet_port_fns); 729 730 /* 731 * When Neponset is attached, the first UART should be 732 * UART3. That's what Angel is doing and many documents 733 * are stating this. 734 * 735 * We do the Neponset mapping even if Neponset support 736 * isn't compiled in so the user will still get something on 737 * the expected physical serial port. 738 * 739 * We no longer do this; not all boot loaders support it, 740 * and UART3 appears to be somewhat unreliable with blob. 741 */ 742 sa1100_register_uart(0, 1); 743 sa1100_register_uart(2, 3); 744 } 745 746 void __init assabet_init_irq(void) 747 { 748 u32 def_val; 749 750 sa1100_init_irq(); 751 752 if (machine_has_neponset()) 753 def_val = ASSABET_BCR_DB1111; 754 else 755 def_val = ASSABET_BCR_DB1110; 756 757 /* 758 * Angel sets this, but other bootloaders may not. 759 * 760 * This must precede any driver calls to BCR_set() or BCR_clear(). 761 */ 762 assabet_init_gpio((void *)&ASSABET_BCR, def_val); 763 } 764 765 MACHINE_START(ASSABET, "Intel-Assabet") 766 .atag_offset = 0x100, 767 .fixup = fixup_assabet, 768 .map_io = assabet_map_io, 769 .nr_irqs = SA1100_NR_IRQS, 770 .init_irq = assabet_init_irq, 771 .init_time = sa1100_timer_init, 772 .init_machine = assabet_init, 773 .init_late = sa11x0_init_late, 774 #ifdef CONFIG_SA1111 775 .dma_zone_size = SZ_1M, 776 #endif 777 .restart = sa11x0_restart, 778 MACHINE_END 779