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/pgtable.h> 38 #include <asm/tlbflush.h> 39 40 #include <asm/mach/arch.h> 41 #include <asm/mach/flash.h> 42 #include <linux/platform_data/irda-sa11x0.h> 43 #include <asm/mach/map.h> 44 #include <mach/assabet.h> 45 #include <linux/platform_data/mfd-mcp-sa11x0.h> 46 #include <mach/irqs.h> 47 48 #include "generic.h" 49 50 #define ASSABET_BCR_DB1110 \ 51 (ASSABET_BCR_SPK_OFF | \ 52 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \ 53 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \ 54 ASSABET_BCR_IRDA_MD0) 55 56 #define ASSABET_BCR_DB1111 \ 57 (ASSABET_BCR_SPK_OFF | \ 58 ASSABET_BCR_LED_GREEN | ASSABET_BCR_LED_RED | \ 59 ASSABET_BCR_RS232EN | ASSABET_BCR_LCD_12RGB | \ 60 ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_STEREO_LB | \ 61 ASSABET_BCR_IRDA_MD0 | ASSABET_BCR_CF_RST) 62 63 unsigned long SCR_value = ASSABET_SCR_INIT; 64 EXPORT_SYMBOL(SCR_value); 65 66 static struct gpio_chip *assabet_bcr_gc; 67 68 static const char *assabet_names[] = { 69 "cf_pwr", "cf_gfx_reset", "nsoft_reset", "irda_fsel", 70 "irda_md0", "irda_md1", "stereo_loopback", "ncf_bus_on", 71 "audio_pwr_on", "light_pwr_on", "lcd16data", "lcd_pwr_on", 72 "rs232_on", "nred_led", "ngreen_led", "vib_on", 73 "com_dtr", "com_rts", "radio_wake_mod", "i2c_enab", 74 "tvir_enab", "qmute", "radio_pwr_on", "spkr_off", 75 "rs232_valid", "com_dcd", "com_cts", "com_dsr", 76 "radio_cts", "radio_dsr", "radio_dcd", "radio_ri", 77 }; 78 79 /* The old deprecated interface */ 80 void ASSABET_BCR_frob(unsigned int mask, unsigned int val) 81 { 82 unsigned long m = mask, v = val; 83 84 assabet_bcr_gc->set_multiple(assabet_bcr_gc, &m, &v); 85 } 86 EXPORT_SYMBOL(ASSABET_BCR_frob); 87 88 static int __init assabet_init_gpio(void __iomem *reg, u32 def_val) 89 { 90 struct gpio_chip *gc; 91 92 writel_relaxed(def_val, reg); 93 94 gc = gpio_reg_init(NULL, reg, -1, 32, "assabet", 0xff000000, def_val, 95 assabet_names, NULL, NULL); 96 97 if (IS_ERR(gc)) 98 return PTR_ERR(gc); 99 100 assabet_bcr_gc = gc; 101 102 return gc->base; 103 } 104 105 /* 106 * The codec reset goes to three devices, so we need to release 107 * the rest when any one of these requests it. However, that 108 * causes the ADV7171 to consume around 100mA - more than half 109 * the LCD-blanked power. 110 * 111 * With the ADV7171, LCD and backlight enabled, we go over 112 * budget on the MAX846 Li-Ion charger, and if no Li-Ion battery 113 * is connected, the Assabet crashes. 114 */ 115 #define RST_UCB1X00 (1 << 0) 116 #define RST_UDA1341 (1 << 1) 117 #define RST_ADV7171 (1 << 2) 118 119 #define SDA GPIO_GPIO(15) 120 #define SCK GPIO_GPIO(18) 121 #define MOD GPIO_GPIO(17) 122 123 static void adv7171_start(void) 124 { 125 GPSR = SCK; 126 udelay(1); 127 GPSR = SDA; 128 udelay(2); 129 GPCR = SDA; 130 } 131 132 static void adv7171_stop(void) 133 { 134 GPSR = SCK; 135 udelay(2); 136 GPSR = SDA; 137 udelay(1); 138 } 139 140 static void adv7171_send(unsigned byte) 141 { 142 unsigned i; 143 144 for (i = 0; i < 8; i++, byte <<= 1) { 145 GPCR = SCK; 146 udelay(1); 147 if (byte & 0x80) 148 GPSR = SDA; 149 else 150 GPCR = SDA; 151 udelay(1); 152 GPSR = SCK; 153 udelay(1); 154 } 155 GPCR = SCK; 156 udelay(1); 157 GPSR = SDA; 158 udelay(1); 159 GPDR &= ~SDA; 160 GPSR = SCK; 161 udelay(1); 162 if (GPLR & SDA) 163 printk(KERN_WARNING "No ACK from ADV7171\n"); 164 udelay(1); 165 GPCR = SCK | SDA; 166 udelay(1); 167 GPDR |= SDA; 168 udelay(1); 169 } 170 171 static void adv7171_write(unsigned reg, unsigned val) 172 { 173 unsigned gpdr = GPDR; 174 unsigned gplr = GPLR; 175 176 ASSABET_BCR_frob(ASSABET_BCR_AUDIO_ON, ASSABET_BCR_AUDIO_ON); 177 udelay(100); 178 179 GPCR = SDA | SCK | MOD; /* clear L3 mode to ensure UDA1341 doesn't respond */ 180 GPDR = (GPDR | SCK | MOD) & ~SDA; 181 udelay(10); 182 if (!(GPLR & SDA)) 183 printk(KERN_WARNING "Something dragging SDA down?\n"); 184 GPDR |= SDA; 185 186 adv7171_start(); 187 adv7171_send(0x54); 188 adv7171_send(reg); 189 adv7171_send(val); 190 adv7171_stop(); 191 192 /* Restore GPIO state for L3 bus */ 193 GPSR = gplr & (SDA | SCK | MOD); 194 GPCR = (~gplr) & (SDA | SCK | MOD); 195 GPDR = gpdr; 196 } 197 198 static void adv7171_sleep(void) 199 { 200 /* Put the ADV7171 into sleep mode */ 201 adv7171_write(0x04, 0x40); 202 } 203 204 static unsigned codec_nreset; 205 206 static void assabet_codec_reset(unsigned mask, int set) 207 { 208 unsigned long flags; 209 bool old; 210 211 local_irq_save(flags); 212 old = !codec_nreset; 213 if (set) 214 codec_nreset &= ~mask; 215 else 216 codec_nreset |= mask; 217 218 if (old != !codec_nreset) { 219 if (codec_nreset) { 220 ASSABET_BCR_set(ASSABET_BCR_NCODEC_RST); 221 adv7171_sleep(); 222 } else { 223 ASSABET_BCR_clear(ASSABET_BCR_NCODEC_RST); 224 } 225 } 226 local_irq_restore(flags); 227 } 228 229 static void assabet_ucb1x00_reset(enum ucb1x00_reset state) 230 { 231 int set = state == UCB_RST_REMOVE || state == UCB_RST_SUSPEND || 232 state == UCB_RST_PROBE_FAIL; 233 assabet_codec_reset(RST_UCB1X00, set); 234 } 235 236 void assabet_uda1341_reset(int set) 237 { 238 assabet_codec_reset(RST_UDA1341, set); 239 } 240 EXPORT_SYMBOL(assabet_uda1341_reset); 241 242 243 /* 244 * Assabet flash support code. 245 */ 246 247 #ifdef ASSABET_REV_4 248 /* 249 * Phase 4 Assabet has two 28F160B3 flash parts in bank 0: 250 */ 251 static struct mtd_partition assabet_partitions[] = { 252 { 253 .name = "bootloader", 254 .size = 0x00020000, 255 .offset = 0, 256 .mask_flags = MTD_WRITEABLE, 257 }, { 258 .name = "bootloader params", 259 .size = 0x00020000, 260 .offset = MTDPART_OFS_APPEND, 261 .mask_flags = MTD_WRITEABLE, 262 }, { 263 .name = "jffs", 264 .size = MTDPART_SIZ_FULL, 265 .offset = MTDPART_OFS_APPEND, 266 } 267 }; 268 #else 269 /* 270 * Phase 5 Assabet has two 28F128J3A flash parts in bank 0: 271 */ 272 static struct mtd_partition assabet_partitions[] = { 273 { 274 .name = "bootloader", 275 .size = 0x00040000, 276 .offset = 0, 277 .mask_flags = MTD_WRITEABLE, 278 }, { 279 .name = "bootloader params", 280 .size = 0x00040000, 281 .offset = MTDPART_OFS_APPEND, 282 .mask_flags = MTD_WRITEABLE, 283 }, { 284 .name = "jffs", 285 .size = MTDPART_SIZ_FULL, 286 .offset = MTDPART_OFS_APPEND, 287 } 288 }; 289 #endif 290 291 static struct flash_platform_data assabet_flash_data = { 292 .map_name = "cfi_probe", 293 .parts = assabet_partitions, 294 .nr_parts = ARRAY_SIZE(assabet_partitions), 295 }; 296 297 static struct resource assabet_flash_resources[] = { 298 DEFINE_RES_MEM(SA1100_CS0_PHYS, SZ_32M), 299 DEFINE_RES_MEM(SA1100_CS1_PHYS, SZ_32M), 300 }; 301 302 303 /* 304 * Assabet IrDA support code. 305 */ 306 307 static int assabet_irda_set_power(struct device *dev, unsigned int state) 308 { 309 static unsigned int bcr_state[4] = { 310 ASSABET_BCR_IRDA_MD0, 311 ASSABET_BCR_IRDA_MD1|ASSABET_BCR_IRDA_MD0, 312 ASSABET_BCR_IRDA_MD1, 313 0 314 }; 315 316 if (state < 4) 317 ASSABET_BCR_frob(ASSABET_BCR_IRDA_MD1 | ASSABET_BCR_IRDA_MD0, 318 bcr_state[state]); 319 return 0; 320 } 321 322 static void assabet_irda_set_speed(struct device *dev, unsigned int speed) 323 { 324 if (speed < 4000000) 325 ASSABET_BCR_clear(ASSABET_BCR_IRDA_FSEL); 326 else 327 ASSABET_BCR_set(ASSABET_BCR_IRDA_FSEL); 328 } 329 330 static struct irda_platform_data assabet_irda_data = { 331 .set_power = assabet_irda_set_power, 332 .set_speed = assabet_irda_set_speed, 333 }; 334 335 static struct ucb1x00_plat_data assabet_ucb1x00_data = { 336 .reset = assabet_ucb1x00_reset, 337 .gpio_base = -1, 338 .can_wakeup = 1, 339 }; 340 341 static struct mcp_plat_data assabet_mcp_data = { 342 .mccr0 = MCCR0_ADM, 343 .sclk_rate = 11981000, 344 .codec_pdata = &assabet_ucb1x00_data, 345 }; 346 347 static void assabet_lcd_set_visual(u32 visual) 348 { 349 u_int is_true_color = visual == FB_VISUAL_TRUECOLOR; 350 351 if (machine_is_assabet()) { 352 #if 1 // phase 4 or newer Assabet's 353 if (is_true_color) 354 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB); 355 else 356 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB); 357 #else 358 // older Assabet's 359 if (is_true_color) 360 ASSABET_BCR_clear(ASSABET_BCR_LCD_12RGB); 361 else 362 ASSABET_BCR_set(ASSABET_BCR_LCD_12RGB); 363 #endif 364 } 365 } 366 367 #ifndef ASSABET_PAL_VIDEO 368 static void assabet_lcd_backlight_power(int on) 369 { 370 if (on) 371 ASSABET_BCR_set(ASSABET_BCR_LIGHT_ON); 372 else 373 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON); 374 } 375 376 /* 377 * Turn on/off the backlight. When turning the backlight on, we wait 378 * 500us after turning it on so we don't cause the supplies to droop 379 * when we enable the LCD controller (and cause a hard reset.) 380 */ 381 static void assabet_lcd_power(int on) 382 { 383 if (on) { 384 ASSABET_BCR_set(ASSABET_BCR_LCD_ON); 385 udelay(500); 386 } else 387 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON); 388 } 389 390 /* 391 * The assabet uses a sharp LQ039Q2DS54 LCD module. It is actually 392 * takes an RGB666 signal, but we provide it with an RGB565 signal 393 * instead (def_rgb_16). 394 */ 395 static struct sa1100fb_mach_info lq039q2ds54_info = { 396 .pixclock = 171521, .bpp = 16, 397 .xres = 320, .yres = 240, 398 399 .hsync_len = 5, .vsync_len = 1, 400 .left_margin = 61, .upper_margin = 3, 401 .right_margin = 9, .lower_margin = 0, 402 403 .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT, 404 405 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act, 406 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(2), 407 408 .backlight_power = assabet_lcd_backlight_power, 409 .lcd_power = assabet_lcd_power, 410 .set_visual = assabet_lcd_set_visual, 411 }; 412 #else 413 static void assabet_pal_backlight_power(int on) 414 { 415 ASSABET_BCR_clear(ASSABET_BCR_LIGHT_ON); 416 } 417 418 static void assabet_pal_power(int on) 419 { 420 ASSABET_BCR_clear(ASSABET_BCR_LCD_ON); 421 } 422 423 static struct sa1100fb_mach_info pal_info = { 424 .pixclock = 67797, .bpp = 16, 425 .xres = 640, .yres = 512, 426 427 .hsync_len = 64, .vsync_len = 6, 428 .left_margin = 125, .upper_margin = 70, 429 .right_margin = 115, .lower_margin = 36, 430 431 .lccr0 = LCCR0_Color | LCCR0_Sngl | LCCR0_Act, 432 .lccr3 = LCCR3_OutEnH | LCCR3_PixRsEdg | LCCR3_ACBsDiv(512), 433 434 .backlight_power = assabet_pal_backlight_power, 435 .lcd_power = assabet_pal_power, 436 .set_visual = assabet_lcd_set_visual, 437 }; 438 #endif 439 440 #ifdef CONFIG_ASSABET_NEPONSET 441 static struct resource neponset_resources[] = { 442 DEFINE_RES_MEM(0x10000000, 0x08000000), 443 DEFINE_RES_MEM(0x18000000, 0x04000000), 444 DEFINE_RES_MEM(0x40000000, SZ_8K), 445 DEFINE_RES_IRQ(IRQ_GPIO25), 446 }; 447 #endif 448 449 static struct gpiod_lookup_table assabet_cf_gpio_table = { 450 .dev_id = "sa11x0-pcmcia.1", 451 .table = { 452 GPIO_LOOKUP("gpio", 21, "ready", GPIO_ACTIVE_HIGH), 453 GPIO_LOOKUP("gpio", 22, "detect", GPIO_ACTIVE_LOW), 454 GPIO_LOOKUP("gpio", 24, "bvd2", GPIO_ACTIVE_HIGH), 455 GPIO_LOOKUP("gpio", 25, "bvd1", GPIO_ACTIVE_HIGH), 456 GPIO_LOOKUP("assabet", 1, "reset", GPIO_ACTIVE_HIGH), 457 GPIO_LOOKUP("assabet", 7, "bus-enable", GPIO_ACTIVE_LOW), 458 { }, 459 }, 460 }; 461 462 static struct regulator_consumer_supply assabet_cf_vcc_consumers[] = { 463 REGULATOR_SUPPLY("vcc", "sa11x0-pcmcia.1"), 464 }; 465 466 static struct fixed_voltage_config assabet_cf_vcc_pdata __initdata = { 467 .supply_name = "cf-power", 468 .microvolts = 3300000, 469 }; 470 471 static struct gpiod_lookup_table assabet_cf_vcc_gpio_table = { 472 .dev_id = "reg-fixed-voltage.0", 473 .table = { 474 GPIO_LOOKUP("assabet", 0, NULL, GPIO_ACTIVE_HIGH), 475 { }, 476 }, 477 }; 478 479 static struct gpio_led assabet_leds[] __initdata = { 480 { 481 .name = "assabet:red", 482 .default_trigger = "cpu0", 483 .active_low = 1, 484 .default_state = LEDS_GPIO_DEFSTATE_KEEP, 485 }, { 486 .name = "assabet:green", 487 .default_trigger = "heartbeat", 488 .active_low = 1, 489 .default_state = LEDS_GPIO_DEFSTATE_KEEP, 490 }, 491 }; 492 493 static const struct gpio_led_platform_data assabet_leds_pdata __initconst = { 494 .num_leds = ARRAY_SIZE(assabet_leds), 495 .leds = assabet_leds, 496 }; 497 498 static struct gpio_keys_button assabet_keys_buttons[] = { 499 { 500 .gpio = 0, 501 .irq = IRQ_GPIO0, 502 .desc = "gpio0", 503 .wakeup = 1, 504 .can_disable = 1, 505 .debounce_interval = 5, 506 }, { 507 .gpio = 1, 508 .irq = IRQ_GPIO1, 509 .desc = "gpio1", 510 .wakeup = 1, 511 .can_disable = 1, 512 .debounce_interval = 5, 513 }, 514 }; 515 516 static const struct gpio_keys_platform_data assabet_keys_pdata = { 517 .buttons = assabet_keys_buttons, 518 .nbuttons = ARRAY_SIZE(assabet_keys_buttons), 519 .rep = 0, 520 }; 521 522 static void __init assabet_init(void) 523 { 524 /* 525 * Ensure that the power supply is in "high power" mode. 526 */ 527 GPSR = GPIO_GPIO16; 528 GPDR |= GPIO_GPIO16; 529 530 /* 531 * Ensure that these pins are set as outputs and are driving 532 * logic 0. This ensures that we won't inadvertently toggle 533 * the WS latch in the CPLD, and we don't float causing 534 * excessive power drain. --rmk 535 */ 536 GPCR = GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; 537 GPDR |= GPIO_SSP_TXD | GPIO_SSP_SCLK | GPIO_SSP_SFRM; 538 539 /* 540 * Also set GPIO27 as an output; this is used to clock UART3 541 * via the FPGA and as otherwise has no pullups or pulldowns, 542 * so stop it floating. 543 */ 544 GPCR = GPIO_GPIO27; 545 GPDR |= GPIO_GPIO27; 546 547 /* 548 * Set up registers for sleep mode. 549 */ 550 PWER = PWER_GPIO0; 551 PGSR = 0; 552 PCFR = 0; 553 PSDR = 0; 554 PPDR |= PPC_TXD3 | PPC_TXD1; 555 PPSR |= PPC_TXD3 | PPC_TXD1; 556 557 sa11x0_ppc_configure_mcp(); 558 559 if (machine_has_neponset()) { 560 #ifndef CONFIG_ASSABET_NEPONSET 561 printk( "Warning: Neponset detected but full support " 562 "hasn't been configured in the kernel\n" ); 563 #else 564 platform_device_register_simple("neponset", 0, 565 neponset_resources, ARRAY_SIZE(neponset_resources)); 566 #endif 567 } else { 568 gpiod_add_lookup_table(&assabet_cf_vcc_gpio_table); 569 sa11x0_register_fixed_regulator(0, &assabet_cf_vcc_pdata, 570 assabet_cf_vcc_consumers, 571 ARRAY_SIZE(assabet_cf_vcc_consumers), 572 true); 573 574 } 575 576 platform_device_register_resndata(NULL, "gpio-keys", 0, 577 NULL, 0, 578 &assabet_keys_pdata, 579 sizeof(assabet_keys_pdata)); 580 581 gpio_led_register_device(-1, &assabet_leds_pdata); 582 583 #ifndef ASSABET_PAL_VIDEO 584 sa11x0_register_lcd(&lq039q2ds54_info); 585 #else 586 sa11x0_register_lcd(&pal_video); 587 #endif 588 sa11x0_register_mtd(&assabet_flash_data, assabet_flash_resources, 589 ARRAY_SIZE(assabet_flash_resources)); 590 sa11x0_register_irda(&assabet_irda_data); 591 sa11x0_register_mcp(&assabet_mcp_data); 592 593 if (!machine_has_neponset()) 594 sa11x0_register_pcmcia(1, &assabet_cf_gpio_table); 595 } 596 597 /* 598 * On Assabet, we must probe for the Neponset board _before_ 599 * paging_init() has occurred to actually determine the amount 600 * of RAM available. To do so, we map the appropriate IO section 601 * in the page table here in order to access GPIO registers. 602 */ 603 static void __init map_sa1100_gpio_regs( void ) 604 { 605 unsigned long phys = __PREG(GPLR) & PMD_MASK; 606 unsigned long virt = (unsigned long)io_p2v(phys); 607 int prot = PMD_TYPE_SECT | PMD_SECT_AP_WRITE | PMD_DOMAIN(DOMAIN_IO); 608 pmd_t *pmd; 609 610 pmd = pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt); 611 *pmd = __pmd(phys | prot); 612 flush_pmd_entry(pmd); 613 } 614 615 /* 616 * Read System Configuration "Register" 617 * (taken from "Intel StrongARM SA-1110 Microprocessor Development Board 618 * User's Guide", section 4.4.1) 619 * 620 * This same scan is performed in arch/arm/boot/compressed/head-sa1100.S 621 * to set up the serial port for decompression status messages. We 622 * repeat it here because the kernel may not be loaded as a zImage, and 623 * also because it's a hassle to communicate the SCR value to the kernel 624 * from the decompressor. 625 * 626 * Note that IRQs are guaranteed to be disabled. 627 */ 628 static void __init get_assabet_scr(void) 629 { 630 unsigned long uninitialized_var(scr), i; 631 632 GPDR |= 0x3fc; /* Configure GPIO 9:2 as outputs */ 633 GPSR = 0x3fc; /* Write 0xFF to GPIO 9:2 */ 634 GPDR &= ~(0x3fc); /* Configure GPIO 9:2 as inputs */ 635 for(i = 100; i--; ) /* Read GPIO 9:2 */ 636 scr = GPLR; 637 GPDR |= 0x3fc; /* restore correct pin direction */ 638 scr &= 0x3fc; /* save as system configuration byte. */ 639 SCR_value = scr; 640 } 641 642 static void __init 643 fixup_assabet(struct tag *tags, char **cmdline) 644 { 645 /* This must be done before any call to machine_has_neponset() */ 646 map_sa1100_gpio_regs(); 647 get_assabet_scr(); 648 649 if (machine_has_neponset()) 650 printk("Neponset expansion board detected\n"); 651 } 652 653 654 static void assabet_uart_pm(struct uart_port *port, u_int state, u_int oldstate) 655 { 656 if (port->mapbase == _Ser1UTCR0) { 657 if (state) 658 ASSABET_BCR_clear(ASSABET_BCR_RS232EN | 659 ASSABET_BCR_COM_RTS | 660 ASSABET_BCR_COM_DTR); 661 else 662 ASSABET_BCR_set(ASSABET_BCR_RS232EN | 663 ASSABET_BCR_COM_RTS | 664 ASSABET_BCR_COM_DTR); 665 } 666 } 667 668 /* 669 * Assabet uses COM_RTS and COM_DTR for both UART1 (com port) 670 * and UART3 (radio module). We only handle them for UART1 here. 671 */ 672 static void assabet_set_mctrl(struct uart_port *port, u_int mctrl) 673 { 674 if (port->mapbase == _Ser1UTCR0) { 675 u_int set = 0, clear = 0; 676 677 if (mctrl & TIOCM_RTS) 678 clear |= ASSABET_BCR_COM_RTS; 679 else 680 set |= ASSABET_BCR_COM_RTS; 681 682 if (mctrl & TIOCM_DTR) 683 clear |= ASSABET_BCR_COM_DTR; 684 else 685 set |= ASSABET_BCR_COM_DTR; 686 687 ASSABET_BCR_clear(clear); 688 ASSABET_BCR_set(set); 689 } 690 } 691 692 static u_int assabet_get_mctrl(struct uart_port *port) 693 { 694 u_int ret = 0; 695 u_int bsr = ASSABET_BSR; 696 697 /* need 2 reads to read current value */ 698 bsr = ASSABET_BSR; 699 700 if (port->mapbase == _Ser1UTCR0) { 701 if (bsr & ASSABET_BSR_COM_DCD) 702 ret |= TIOCM_CD; 703 if (bsr & ASSABET_BSR_COM_CTS) 704 ret |= TIOCM_CTS; 705 if (bsr & ASSABET_BSR_COM_DSR) 706 ret |= TIOCM_DSR; 707 } else if (port->mapbase == _Ser3UTCR0) { 708 if (bsr & ASSABET_BSR_RAD_DCD) 709 ret |= TIOCM_CD; 710 if (bsr & ASSABET_BSR_RAD_CTS) 711 ret |= TIOCM_CTS; 712 if (bsr & ASSABET_BSR_RAD_DSR) 713 ret |= TIOCM_DSR; 714 if (bsr & ASSABET_BSR_RAD_RI) 715 ret |= TIOCM_RI; 716 } else { 717 ret = TIOCM_CD | TIOCM_CTS | TIOCM_DSR; 718 } 719 720 return ret; 721 } 722 723 static struct sa1100_port_fns assabet_port_fns __initdata = { 724 .set_mctrl = assabet_set_mctrl, 725 .get_mctrl = assabet_get_mctrl, 726 .pm = assabet_uart_pm, 727 }; 728 729 static struct map_desc assabet_io_desc[] __initdata = { 730 { /* Board Control Register */ 731 .virtual = 0xf1000000, 732 .pfn = __phys_to_pfn(0x12000000), 733 .length = 0x00100000, 734 .type = MT_DEVICE 735 }, { /* MQ200 */ 736 .virtual = 0xf2800000, 737 .pfn = __phys_to_pfn(0x4b800000), 738 .length = 0x00800000, 739 .type = MT_DEVICE 740 } 741 }; 742 743 static void __init assabet_map_io(void) 744 { 745 sa1100_map_io(); 746 iotable_init(assabet_io_desc, ARRAY_SIZE(assabet_io_desc)); 747 748 /* 749 * Set SUS bit in SDCR0 so serial port 1 functions. 750 * Its called GPCLKR0 in my SA1110 manual. 751 */ 752 Ser1SDCR0 |= SDCR0_SUS; 753 MSC1 = (MSC1 & ~0xffff) | 754 MSC_NonBrst | MSC_32BitStMem | 755 MSC_RdAcc(2) | MSC_WrAcc(2) | MSC_Rec(0); 756 757 if (!machine_has_neponset()) 758 sa1100_register_uart_fns(&assabet_port_fns); 759 760 /* 761 * When Neponset is attached, the first UART should be 762 * UART3. That's what Angel is doing and many documents 763 * are stating this. 764 * 765 * We do the Neponset mapping even if Neponset support 766 * isn't compiled in so the user will still get something on 767 * the expected physical serial port. 768 * 769 * We no longer do this; not all boot loaders support it, 770 * and UART3 appears to be somewhat unreliable with blob. 771 */ 772 sa1100_register_uart(0, 1); 773 sa1100_register_uart(2, 3); 774 } 775 776 void __init assabet_init_irq(void) 777 { 778 unsigned int assabet_gpio_base; 779 u32 def_val; 780 781 sa1100_init_irq(); 782 783 if (machine_has_neponset()) 784 def_val = ASSABET_BCR_DB1111; 785 else 786 def_val = ASSABET_BCR_DB1110; 787 788 /* 789 * Angel sets this, but other bootloaders may not. 790 * 791 * This must precede any driver calls to BCR_set() or BCR_clear(). 792 */ 793 assabet_gpio_base = assabet_init_gpio((void *)&ASSABET_BCR, def_val); 794 795 assabet_leds[0].gpio = assabet_gpio_base + 13; 796 assabet_leds[1].gpio = assabet_gpio_base + 14; 797 } 798 799 MACHINE_START(ASSABET, "Intel-Assabet") 800 .atag_offset = 0x100, 801 .fixup = fixup_assabet, 802 .map_io = assabet_map_io, 803 .nr_irqs = SA1100_NR_IRQS, 804 .init_irq = assabet_init_irq, 805 .init_time = sa1100_timer_init, 806 .init_machine = assabet_init, 807 .init_late = sa11x0_init_late, 808 #ifdef CONFIG_SA1111 809 .dma_zone_size = SZ_1M, 810 #endif 811 .restart = sa11x0_restart, 812 MACHINE_END 813