1 /* 2 * linux/arch/arm/common/locomo.c 3 * 4 * Sharp LoCoMo support 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This file contains all generic LoCoMo support. 11 * 12 * All initialization functions provided here are intended to be called 13 * from machine specific code with proper arguments when required. 14 * 15 * Based on sa1111.c 16 */ 17 18 #include <linux/config.h> 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/kernel.h> 22 #include <linux/delay.h> 23 #include <linux/errno.h> 24 #include <linux/ioport.h> 25 #include <linux/device.h> 26 #include <linux/slab.h> 27 #include <linux/spinlock.h> 28 29 #include <asm/hardware.h> 30 #include <asm/mach-types.h> 31 #include <asm/io.h> 32 #include <asm/irq.h> 33 #include <asm/mach/irq.h> 34 35 #include <asm/hardware/locomo.h> 36 37 /* M62332 output channel selection */ 38 #define M62332_EVR_CH 1 /* M62332 volume channel number */ 39 /* 0 : CH.1 , 1 : CH. 2 */ 40 /* DAC send data */ 41 #define M62332_SLAVE_ADDR 0x4e /* Slave address */ 42 #define M62332_W_BIT 0x00 /* W bit (0 only) */ 43 #define M62332_SUB_ADDR 0x00 /* Sub address */ 44 #define M62332_A_BIT 0x00 /* A bit (0 only) */ 45 46 /* DAC setup and hold times (expressed in us) */ 47 #define DAC_BUS_FREE_TIME 5 /* 4.7 us */ 48 #define DAC_START_SETUP_TIME 5 /* 4.7 us */ 49 #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */ 50 #define DAC_START_HOLD_TIME 5 /* 4.7 us */ 51 #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */ 52 #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */ 53 #define DAC_DATA_SETUP_TIME 1 /* 250 ns */ 54 #define DAC_DATA_HOLD_TIME 1 /* 300 ns */ 55 #define DAC_LOW_SETUP_TIME 1 /* 300 ns */ 56 #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */ 57 58 /* the following is the overall data for the locomo chip */ 59 struct locomo { 60 struct device *dev; 61 unsigned long phys; 62 unsigned int irq; 63 spinlock_t lock; 64 void *base; 65 }; 66 67 struct locomo_dev_info { 68 unsigned long offset; 69 unsigned long length; 70 unsigned int devid; 71 unsigned int irq[1]; 72 const char * name; 73 }; 74 75 /* All the locomo devices. If offset is non-zero, the mapbase for the 76 * locomo_dev will be set to the chip base plus offset. If offset is 77 * zero, then the mapbase for the locomo_dev will be set to zero. An 78 * offset of zero means the device only uses GPIOs or other helper 79 * functions inside this file */ 80 static struct locomo_dev_info locomo_devices[] = { 81 { 82 .devid = LOCOMO_DEVID_KEYBOARD, 83 .irq = { 84 IRQ_LOCOMO_KEY, 85 }, 86 .name = "locomo-keyboard", 87 .offset = LOCOMO_KEYBOARD, 88 .length = 16, 89 }, 90 { 91 .devid = LOCOMO_DEVID_FRONTLIGHT, 92 .irq = {}, 93 .name = "locomo-frontlight", 94 .offset = LOCOMO_FRONTLIGHT, 95 .length = 8, 96 97 }, 98 { 99 .devid = LOCOMO_DEVID_BACKLIGHT, 100 .irq = {}, 101 .name = "locomo-backlight", 102 .offset = LOCOMO_BACKLIGHT, 103 .length = 8, 104 }, 105 { 106 .devid = LOCOMO_DEVID_AUDIO, 107 .irq = {}, 108 .name = "locomo-audio", 109 .offset = LOCOMO_AUDIO, 110 .length = 4, 111 }, 112 { 113 .devid = LOCOMO_DEVID_LED, 114 .irq = {}, 115 .name = "locomo-led", 116 .offset = LOCOMO_LED, 117 .length = 8, 118 }, 119 { 120 .devid = LOCOMO_DEVID_UART, 121 .irq = {}, 122 .name = "locomo-uart", 123 .offset = 0, 124 .length = 0, 125 }, 126 }; 127 128 129 /** LoCoMo interrupt handling stuff. 130 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs. 131 * that is, there is only one real hardware interrupt 132 * we determine which interrupt it is by reading some IO memory. 133 * We have two levels of expansion, first in the handler for the 134 * hardware interrupt we generate an interrupt 135 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts 136 * 137 * hardware irq reads LOCOMO_ICR & 0x0f00 138 * IRQ_LOCOMO_KEY_BASE 139 * IRQ_LOCOMO_GPIO_BASE 140 * IRQ_LOCOMO_LT_BASE 141 * IRQ_LOCOMO_SPI_BASE 142 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001 143 * IRQ_LOCOMO_KEY 144 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff 145 * IRQ_LOCOMO_GPIO[0-15] 146 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001 147 * IRQ_LOCOMO_LT 148 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F 149 * IRQ_LOCOMO_SPI_RFR 150 * IRQ_LOCOMO_SPI_RFW 151 * IRQ_LOCOMO_SPI_OVRN 152 * IRQ_LOCOMO_SPI_TEND 153 */ 154 155 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE) 156 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY) 157 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0) 158 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT) 159 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR) 160 161 static void locomo_handler(unsigned int irq, struct irqdesc *desc, 162 struct pt_regs *regs) 163 { 164 int req, i; 165 struct irqdesc *d; 166 void *mapbase = get_irq_chipdata(irq); 167 168 /* Acknowledge the parent IRQ */ 169 desc->chip->ack(irq); 170 171 /* check why this interrupt was generated */ 172 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00; 173 174 if (req) { 175 /* generate the next interrupt(s) */ 176 irq = LOCOMO_IRQ_START; 177 d = irq_desc + irq; 178 for (i = 0; i <= 3; i++, d++, irq++) { 179 if (req & (0x0100 << i)) { 180 d->handle(irq, d, regs); 181 } 182 183 } 184 } 185 } 186 187 static void locomo_ack_irq(unsigned int irq) 188 { 189 } 190 191 static void locomo_mask_irq(unsigned int irq) 192 { 193 void *mapbase = get_irq_chipdata(irq); 194 unsigned int r; 195 r = locomo_readl(mapbase + LOCOMO_ICR); 196 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START)); 197 locomo_writel(r, mapbase + LOCOMO_ICR); 198 } 199 200 static void locomo_unmask_irq(unsigned int irq) 201 { 202 void *mapbase = get_irq_chipdata(irq); 203 unsigned int r; 204 r = locomo_readl(mapbase + LOCOMO_ICR); 205 r |= (0x0010 << (irq - LOCOMO_IRQ_START)); 206 locomo_writel(r, mapbase + LOCOMO_ICR); 207 } 208 209 static struct irqchip locomo_chip = { 210 .ack = locomo_ack_irq, 211 .mask = locomo_mask_irq, 212 .unmask = locomo_unmask_irq, 213 }; 214 215 static void locomo_key_handler(unsigned int irq, struct irqdesc *desc, 216 struct pt_regs *regs) 217 { 218 struct irqdesc *d; 219 void *mapbase = get_irq_chipdata(irq); 220 221 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) { 222 d = irq_desc + LOCOMO_IRQ_KEY_START; 223 d->handle(LOCOMO_IRQ_KEY_START, d, regs); 224 } 225 } 226 227 static void locomo_key_ack_irq(unsigned int irq) 228 { 229 void *mapbase = get_irq_chipdata(irq); 230 unsigned int r; 231 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 232 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START)); 233 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 234 } 235 236 static void locomo_key_mask_irq(unsigned int irq) 237 { 238 void *mapbase = get_irq_chipdata(irq); 239 unsigned int r; 240 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 241 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 242 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 243 } 244 245 static void locomo_key_unmask_irq(unsigned int irq) 246 { 247 void *mapbase = get_irq_chipdata(irq); 248 unsigned int r; 249 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 250 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 251 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 252 } 253 254 static struct irqchip locomo_key_chip = { 255 .ack = locomo_key_ack_irq, 256 .mask = locomo_key_mask_irq, 257 .unmask = locomo_key_unmask_irq, 258 }; 259 260 static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc, 261 struct pt_regs *regs) 262 { 263 int req, i; 264 struct irqdesc *d; 265 void *mapbase = get_irq_chipdata(irq); 266 267 req = locomo_readl(mapbase + LOCOMO_GIR) & 268 locomo_readl(mapbase + LOCOMO_GPD) & 269 0xffff; 270 271 if (req) { 272 irq = LOCOMO_IRQ_GPIO_START; 273 d = irq_desc + LOCOMO_IRQ_GPIO_START; 274 for (i = 0; i <= 15; i++, irq++, d++) { 275 if (req & (0x0001 << i)) { 276 d->handle(irq, d, regs); 277 } 278 } 279 } 280 } 281 282 static void locomo_gpio_ack_irq(unsigned int irq) 283 { 284 void *mapbase = get_irq_chipdata(irq); 285 unsigned int r; 286 r = locomo_readl(mapbase + LOCOMO_GWE); 287 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 288 locomo_writel(r, mapbase + LOCOMO_GWE); 289 290 r = locomo_readl(mapbase + LOCOMO_GIS); 291 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 292 locomo_writel(r, mapbase + LOCOMO_GIS); 293 294 r = locomo_readl(mapbase + LOCOMO_GWE); 295 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 296 locomo_writel(r, mapbase + LOCOMO_GWE); 297 } 298 299 static void locomo_gpio_mask_irq(unsigned int irq) 300 { 301 void *mapbase = get_irq_chipdata(irq); 302 unsigned int r; 303 r = locomo_readl(mapbase + LOCOMO_GIE); 304 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 305 locomo_writel(r, mapbase + LOCOMO_GIE); 306 } 307 308 static void locomo_gpio_unmask_irq(unsigned int irq) 309 { 310 void *mapbase = get_irq_chipdata(irq); 311 unsigned int r; 312 r = locomo_readl(mapbase + LOCOMO_GIE); 313 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 314 locomo_writel(r, mapbase + LOCOMO_GIE); 315 } 316 317 static struct irqchip locomo_gpio_chip = { 318 .ack = locomo_gpio_ack_irq, 319 .mask = locomo_gpio_mask_irq, 320 .unmask = locomo_gpio_unmask_irq, 321 }; 322 323 static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc, 324 struct pt_regs *regs) 325 { 326 struct irqdesc *d; 327 void *mapbase = get_irq_chipdata(irq); 328 329 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) { 330 d = irq_desc + LOCOMO_IRQ_LT_START; 331 d->handle(LOCOMO_IRQ_LT_START, d, regs); 332 } 333 } 334 335 static void locomo_lt_ack_irq(unsigned int irq) 336 { 337 void *mapbase = get_irq_chipdata(irq); 338 unsigned int r; 339 r = locomo_readl(mapbase + LOCOMO_LTINT); 340 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START)); 341 locomo_writel(r, mapbase + LOCOMO_LTINT); 342 } 343 344 static void locomo_lt_mask_irq(unsigned int irq) 345 { 346 void *mapbase = get_irq_chipdata(irq); 347 unsigned int r; 348 r = locomo_readl(mapbase + LOCOMO_LTINT); 349 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START)); 350 locomo_writel(r, mapbase + LOCOMO_LTINT); 351 } 352 353 static void locomo_lt_unmask_irq(unsigned int irq) 354 { 355 void *mapbase = get_irq_chipdata(irq); 356 unsigned int r; 357 r = locomo_readl(mapbase + LOCOMO_LTINT); 358 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START)); 359 locomo_writel(r, mapbase + LOCOMO_LTINT); 360 } 361 362 static struct irqchip locomo_lt_chip = { 363 .ack = locomo_lt_ack_irq, 364 .mask = locomo_lt_mask_irq, 365 .unmask = locomo_lt_unmask_irq, 366 }; 367 368 static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc, 369 struct pt_regs *regs) 370 { 371 int req, i; 372 struct irqdesc *d; 373 void *mapbase = get_irq_chipdata(irq); 374 375 req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F; 376 if (req) { 377 irq = LOCOMO_IRQ_SPI_START; 378 d = irq_desc + irq; 379 380 for (i = 0; i <= 3; i++, irq++, d++) { 381 if (req & (0x0001 << i)) { 382 d->handle(irq, d, regs); 383 } 384 } 385 } 386 } 387 388 static void locomo_spi_ack_irq(unsigned int irq) 389 { 390 void *mapbase = get_irq_chipdata(irq); 391 unsigned int r; 392 r = locomo_readl(mapbase + LOCOMO_SPIWE); 393 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 394 locomo_writel(r, mapbase + LOCOMO_SPIWE); 395 396 r = locomo_readl(mapbase + LOCOMO_SPIIS); 397 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 398 locomo_writel(r, mapbase + LOCOMO_SPIIS); 399 400 r = locomo_readl(mapbase + LOCOMO_SPIWE); 401 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 402 locomo_writel(r, mapbase + LOCOMO_SPIWE); 403 } 404 405 static void locomo_spi_mask_irq(unsigned int irq) 406 { 407 void *mapbase = get_irq_chipdata(irq); 408 unsigned int r; 409 r = locomo_readl(mapbase + LOCOMO_SPIIE); 410 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 411 locomo_writel(r, mapbase + LOCOMO_SPIIE); 412 } 413 414 static void locomo_spi_unmask_irq(unsigned int irq) 415 { 416 void *mapbase = get_irq_chipdata(irq); 417 unsigned int r; 418 r = locomo_readl(mapbase + LOCOMO_SPIIE); 419 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 420 locomo_writel(r, mapbase + LOCOMO_SPIIE); 421 } 422 423 static struct irqchip locomo_spi_chip = { 424 .ack = locomo_spi_ack_irq, 425 .mask = locomo_spi_mask_irq, 426 .unmask = locomo_spi_unmask_irq, 427 }; 428 429 static void locomo_setup_irq(struct locomo *lchip) 430 { 431 int irq; 432 void *irqbase = lchip->base; 433 434 /* 435 * Install handler for IRQ_LOCOMO_HW. 436 */ 437 set_irq_type(lchip->irq, IRQT_FALLING); 438 set_irq_chipdata(lchip->irq, irqbase); 439 set_irq_chained_handler(lchip->irq, locomo_handler); 440 441 /* Install handlers for IRQ_LOCOMO_*_BASE */ 442 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip); 443 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase); 444 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler); 445 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE); 446 447 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip); 448 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase); 449 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler); 450 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE); 451 452 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip); 453 set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase); 454 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler); 455 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE); 456 457 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip); 458 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase); 459 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler); 460 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE); 461 462 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */ 463 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip); 464 set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase); 465 set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ); 466 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE); 467 468 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */ 469 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) { 470 set_irq_chip(irq, &locomo_gpio_chip); 471 set_irq_chipdata(irq, irqbase); 472 set_irq_handler(irq, do_edge_IRQ); 473 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 474 } 475 476 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */ 477 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip); 478 set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase); 479 set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ); 480 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE); 481 482 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */ 483 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) { 484 set_irq_chip(irq, &locomo_spi_chip); 485 set_irq_chipdata(irq, irqbase); 486 set_irq_handler(irq, do_edge_IRQ); 487 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 488 } 489 } 490 491 492 static void locomo_dev_release(struct device *_dev) 493 { 494 struct locomo_dev *dev = LOCOMO_DEV(_dev); 495 496 kfree(dev); 497 } 498 499 static int 500 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) 501 { 502 struct locomo_dev *dev; 503 int ret; 504 505 dev = kmalloc(sizeof(struct locomo_dev), GFP_KERNEL); 506 if (!dev) { 507 ret = -ENOMEM; 508 goto out; 509 } 510 memset(dev, 0, sizeof(struct locomo_dev)); 511 512 strncpy(dev->dev.bus_id,info->name,sizeof(dev->dev.bus_id)); 513 /* 514 * If the parent device has a DMA mask associated with it, 515 * propagate it down to the children. 516 */ 517 if (lchip->dev->dma_mask) { 518 dev->dma_mask = *lchip->dev->dma_mask; 519 dev->dev.dma_mask = &dev->dma_mask; 520 } 521 522 dev->devid = info->devid; 523 dev->dev.parent = lchip->dev; 524 dev->dev.bus = &locomo_bus_type; 525 dev->dev.release = locomo_dev_release; 526 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; 527 528 if (info->offset) 529 dev->mapbase = lchip->base + info->offset; 530 else 531 dev->mapbase = 0; 532 dev->length = info->length; 533 534 memmove(dev->irq, info->irq, sizeof(dev->irq)); 535 536 ret = device_register(&dev->dev); 537 if (ret) { 538 out: 539 kfree(dev); 540 } 541 return ret; 542 } 543 544 /** 545 * locomo_probe - probe for a single LoCoMo chip. 546 * @phys_addr: physical address of device. 547 * 548 * Probe for a LoCoMo chip. This must be called 549 * before any other locomo-specific code. 550 * 551 * Returns: 552 * %-ENODEV device not found. 553 * %-EBUSY physical address already marked in-use. 554 * %0 successful. 555 */ 556 static int 557 __locomo_probe(struct device *me, struct resource *mem, int irq) 558 { 559 struct locomo *lchip; 560 unsigned long r; 561 int i, ret = -ENODEV; 562 563 lchip = kmalloc(sizeof(struct locomo), GFP_KERNEL); 564 if (!lchip) 565 return -ENOMEM; 566 567 memset(lchip, 0, sizeof(struct locomo)); 568 569 spin_lock_init(&lchip->lock); 570 571 lchip->dev = me; 572 dev_set_drvdata(lchip->dev, lchip); 573 574 lchip->phys = mem->start; 575 lchip->irq = irq; 576 577 /* 578 * Map the whole region. This also maps the 579 * registers for our children. 580 */ 581 lchip->base = ioremap(mem->start, PAGE_SIZE); 582 if (!lchip->base) { 583 ret = -ENOMEM; 584 goto out; 585 } 586 587 /* locomo initialize */ 588 locomo_writel(0, lchip->base + LOCOMO_ICR); 589 /* KEYBOARD */ 590 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 591 592 /* GPIO */ 593 locomo_writel(0, lchip->base + LOCOMO_GPO); 594 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 595 , lchip->base + LOCOMO_GPE); 596 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 597 , lchip->base + LOCOMO_GPD); 598 locomo_writel(0, lchip->base + LOCOMO_GIE); 599 600 /* FrontLight */ 601 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); 602 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); 603 /* Longtime timer */ 604 locomo_writel(0, lchip->base + LOCOMO_LTINT); 605 /* SPI */ 606 locomo_writel(0, lchip->base + LOCOMO_SPIIE); 607 608 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); 609 r = locomo_readl(lchip->base + LOCOMO_ASD); 610 r |= 0x8000; 611 locomo_writel(r, lchip->base + LOCOMO_ASD); 612 613 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); 614 r = locomo_readl(lchip->base + LOCOMO_HSD); 615 r |= 0x8000; 616 locomo_writel(r, lchip->base + LOCOMO_HSD); 617 618 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); 619 620 /* XON */ 621 locomo_writel(0x80, lchip->base + LOCOMO_TADC); 622 udelay(1000); 623 /* CLK9MEN */ 624 r = locomo_readl(lchip->base + LOCOMO_TADC); 625 r |= 0x10; 626 locomo_writel(r, lchip->base + LOCOMO_TADC); 627 udelay(100); 628 629 /* init DAC */ 630 r = locomo_readl(lchip->base + LOCOMO_DAC); 631 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 632 locomo_writel(r, lchip->base + LOCOMO_DAC); 633 634 r = locomo_readl(lchip->base + LOCOMO_VER); 635 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); 636 637 /* 638 * The interrupt controller must be initialised before any 639 * other device to ensure that the interrupts are available. 640 */ 641 if (lchip->irq != NO_IRQ) 642 locomo_setup_irq(lchip); 643 644 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) 645 locomo_init_one_child(lchip, &locomo_devices[i]); 646 647 return 0; 648 649 out: 650 kfree(lchip); 651 return ret; 652 } 653 654 static void __locomo_remove(struct locomo *lchip) 655 { 656 struct list_head *l, *n; 657 658 list_for_each_safe(l, n, &lchip->dev->children) { 659 struct device *d = list_to_dev(l); 660 661 device_unregister(d); 662 } 663 664 if (lchip->irq != NO_IRQ) { 665 set_irq_chained_handler(lchip->irq, NULL); 666 set_irq_data(lchip->irq, NULL); 667 } 668 669 iounmap(lchip->base); 670 kfree(lchip); 671 } 672 673 static int locomo_probe(struct device *dev) 674 { 675 struct platform_device *pdev = to_platform_device(dev); 676 struct resource *mem; 677 int irq; 678 679 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 680 if (!mem) 681 return -EINVAL; 682 irq = platform_get_irq(pdev, 0); 683 684 return __locomo_probe(dev, mem, irq); 685 } 686 687 static int locomo_remove(struct device *dev) 688 { 689 struct locomo *lchip = dev_get_drvdata(dev); 690 691 if (lchip) { 692 __locomo_remove(lchip); 693 dev_set_drvdata(dev, NULL); 694 } 695 696 return 0; 697 } 698 699 /* 700 * Not sure if this should be on the system bus or not yet. 701 * We really want some way to register a system device at 702 * the per-machine level, and then have this driver pick 703 * up the registered devices. 704 */ 705 static struct device_driver locomo_device_driver = { 706 .name = "locomo", 707 .bus = &platform_bus_type, 708 .probe = locomo_probe, 709 .remove = locomo_remove, 710 }; 711 712 /* 713 * Get the parent device driver (us) structure 714 * from a child function device 715 */ 716 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) 717 { 718 return (struct locomo *)dev_get_drvdata(ldev->dev.parent); 719 } 720 721 void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir) 722 { 723 struct locomo *lchip = locomo_chip_driver(ldev); 724 unsigned long flags; 725 unsigned int r; 726 727 spin_lock_irqsave(&lchip->lock, flags); 728 729 r = locomo_readl(lchip->base + LOCOMO_GPD); 730 r &= ~bits; 731 locomo_writel(r, lchip->base + LOCOMO_GPD); 732 733 r = locomo_readl(lchip->base + LOCOMO_GPE); 734 if (dir) 735 r |= bits; 736 else 737 r &= ~bits; 738 locomo_writel(r, lchip->base + LOCOMO_GPE); 739 740 spin_unlock_irqrestore(&lchip->lock, flags); 741 } 742 743 unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits) 744 { 745 struct locomo *lchip = locomo_chip_driver(ldev); 746 unsigned long flags; 747 unsigned int ret; 748 749 spin_lock_irqsave(&lchip->lock, flags); 750 ret = locomo_readl(lchip->base + LOCOMO_GPL); 751 spin_unlock_irqrestore(&lchip->lock, flags); 752 753 ret &= bits; 754 return ret; 755 } 756 757 unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits) 758 { 759 struct locomo *lchip = locomo_chip_driver(ldev); 760 unsigned long flags; 761 unsigned int ret; 762 763 spin_lock_irqsave(&lchip->lock, flags); 764 ret = locomo_readl(lchip->base + LOCOMO_GPO); 765 spin_unlock_irqrestore(&lchip->lock, flags); 766 767 ret &= bits; 768 return ret; 769 } 770 771 void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set) 772 { 773 struct locomo *lchip = locomo_chip_driver(ldev); 774 unsigned long flags; 775 unsigned int r; 776 777 spin_lock_irqsave(&lchip->lock, flags); 778 779 r = locomo_readl(lchip->base + LOCOMO_GPO); 780 if (set) 781 r |= bits; 782 else 783 r &= ~bits; 784 locomo_writel(r, lchip->base + LOCOMO_GPO); 785 786 spin_unlock_irqrestore(&lchip->lock, flags); 787 } 788 789 static void locomo_m62332_sendbit(void *mapbase, int bit) 790 { 791 unsigned int r; 792 793 r = locomo_readl(mapbase + LOCOMO_DAC); 794 r &= ~(LOCOMO_DAC_SCLOEB); 795 locomo_writel(r, mapbase + LOCOMO_DAC); 796 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 797 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 798 r = locomo_readl(mapbase + LOCOMO_DAC); 799 r &= ~(LOCOMO_DAC_SCLOEB); 800 locomo_writel(r, mapbase + LOCOMO_DAC); 801 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 802 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 803 804 if (bit & 1) { 805 r = locomo_readl(mapbase + LOCOMO_DAC); 806 r |= LOCOMO_DAC_SDAOEB; 807 locomo_writel(r, mapbase + LOCOMO_DAC); 808 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 809 } else { 810 r = locomo_readl(mapbase + LOCOMO_DAC); 811 r &= ~(LOCOMO_DAC_SDAOEB); 812 locomo_writel(r, mapbase + LOCOMO_DAC); 813 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 814 } 815 816 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ 817 r = locomo_readl(mapbase + LOCOMO_DAC); 818 r |= LOCOMO_DAC_SCLOEB; 819 locomo_writel(r, mapbase + LOCOMO_DAC); 820 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 821 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 822 } 823 824 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) 825 { 826 struct locomo *lchip = locomo_chip_driver(ldev); 827 int i; 828 unsigned char data; 829 unsigned int r; 830 void *mapbase = lchip->base; 831 unsigned long flags; 832 833 spin_lock_irqsave(&lchip->lock, flags); 834 835 /* Start */ 836 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ 837 r = locomo_readl(mapbase + LOCOMO_DAC); 838 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 839 locomo_writel(r, mapbase + LOCOMO_DAC); 840 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 841 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 842 r = locomo_readl(mapbase + LOCOMO_DAC); 843 r &= ~(LOCOMO_DAC_SDAOEB); 844 locomo_writel(r, mapbase + LOCOMO_DAC); 845 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ 846 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 847 848 /* Send slave address and W bit (LSB is W bit) */ 849 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; 850 for (i = 1; i <= 8; i++) { 851 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 852 } 853 854 /* Check A bit */ 855 r = locomo_readl(mapbase + LOCOMO_DAC); 856 r &= ~(LOCOMO_DAC_SCLOEB); 857 locomo_writel(r, mapbase + LOCOMO_DAC); 858 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 859 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 860 r = locomo_readl(mapbase + LOCOMO_DAC); 861 r &= ~(LOCOMO_DAC_SDAOEB); 862 locomo_writel(r, mapbase + LOCOMO_DAC); 863 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 864 r = locomo_readl(mapbase + LOCOMO_DAC); 865 r |= LOCOMO_DAC_SCLOEB; 866 locomo_writel(r, mapbase + LOCOMO_DAC); 867 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 868 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 869 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 870 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); 871 return; 872 } 873 874 /* Send Sub address (LSB is channel select) */ 875 /* channel = 0 : ch1 select */ 876 /* = 1 : ch2 select */ 877 data = M62332_SUB_ADDR + channel; 878 for (i = 1; i <= 8; i++) { 879 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 880 } 881 882 /* Check A bit */ 883 r = locomo_readl(mapbase + LOCOMO_DAC); 884 r &= ~(LOCOMO_DAC_SCLOEB); 885 locomo_writel(r, mapbase + LOCOMO_DAC); 886 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 887 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 888 r = locomo_readl(mapbase + LOCOMO_DAC); 889 r &= ~(LOCOMO_DAC_SDAOEB); 890 locomo_writel(r, mapbase + LOCOMO_DAC); 891 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 892 r = locomo_readl(mapbase + LOCOMO_DAC); 893 r |= LOCOMO_DAC_SCLOEB; 894 locomo_writel(r, mapbase + LOCOMO_DAC); 895 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 896 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 897 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 898 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); 899 return; 900 } 901 902 /* Send DAC data */ 903 for (i = 1; i <= 8; i++) { 904 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); 905 } 906 907 /* Check A bit */ 908 r = locomo_readl(mapbase + LOCOMO_DAC); 909 r &= ~(LOCOMO_DAC_SCLOEB); 910 locomo_writel(r, mapbase + LOCOMO_DAC); 911 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 912 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 913 r = locomo_readl(mapbase + LOCOMO_DAC); 914 r &= ~(LOCOMO_DAC_SDAOEB); 915 locomo_writel(r, mapbase + LOCOMO_DAC); 916 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 917 r = locomo_readl(mapbase + LOCOMO_DAC); 918 r |= LOCOMO_DAC_SCLOEB; 919 locomo_writel(r, mapbase + LOCOMO_DAC); 920 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 921 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 922 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 923 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); 924 return; 925 } 926 927 /* stop */ 928 r = locomo_readl(mapbase + LOCOMO_DAC); 929 r &= ~(LOCOMO_DAC_SCLOEB); 930 locomo_writel(r, mapbase + LOCOMO_DAC); 931 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 932 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 933 r = locomo_readl(mapbase + LOCOMO_DAC); 934 r |= LOCOMO_DAC_SCLOEB; 935 locomo_writel(r, mapbase + LOCOMO_DAC); 936 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 937 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 938 r = locomo_readl(mapbase + LOCOMO_DAC); 939 r |= LOCOMO_DAC_SDAOEB; 940 locomo_writel(r, mapbase + LOCOMO_DAC); 941 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 942 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 943 944 r = locomo_readl(mapbase + LOCOMO_DAC); 945 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 946 locomo_writel(r, mapbase + LOCOMO_DAC); 947 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ 948 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 949 950 spin_unlock_irqrestore(&lchip->lock, flags); 951 } 952 953 /* 954 * LoCoMo "Register Access Bus." 955 * 956 * We model this as a regular bus type, and hang devices directly 957 * off this. 958 */ 959 static int locomo_match(struct device *_dev, struct device_driver *_drv) 960 { 961 struct locomo_dev *dev = LOCOMO_DEV(_dev); 962 struct locomo_driver *drv = LOCOMO_DRV(_drv); 963 964 return dev->devid == drv->devid; 965 } 966 967 static int locomo_bus_suspend(struct device *dev, pm_message_t state) 968 { 969 struct locomo_dev *ldev = LOCOMO_DEV(dev); 970 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 971 int ret = 0; 972 973 if (drv && drv->suspend) 974 ret = drv->suspend(ldev, state); 975 return ret; 976 } 977 978 static int locomo_bus_resume(struct device *dev) 979 { 980 struct locomo_dev *ldev = LOCOMO_DEV(dev); 981 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 982 int ret = 0; 983 984 if (drv && drv->resume) 985 ret = drv->resume(ldev); 986 return ret; 987 } 988 989 static int locomo_bus_probe(struct device *dev) 990 { 991 struct locomo_dev *ldev = LOCOMO_DEV(dev); 992 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 993 int ret = -ENODEV; 994 995 if (drv->probe) 996 ret = drv->probe(ldev); 997 return ret; 998 } 999 1000 static int locomo_bus_remove(struct device *dev) 1001 { 1002 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1003 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1004 int ret = 0; 1005 1006 if (drv->remove) 1007 ret = drv->remove(ldev); 1008 return ret; 1009 } 1010 1011 struct bus_type locomo_bus_type = { 1012 .name = "locomo-bus", 1013 .match = locomo_match, 1014 .suspend = locomo_bus_suspend, 1015 .resume = locomo_bus_resume, 1016 }; 1017 1018 int locomo_driver_register(struct locomo_driver *driver) 1019 { 1020 driver->drv.probe = locomo_bus_probe; 1021 driver->drv.remove = locomo_bus_remove; 1022 driver->drv.bus = &locomo_bus_type; 1023 return driver_register(&driver->drv); 1024 } 1025 1026 void locomo_driver_unregister(struct locomo_driver *driver) 1027 { 1028 driver_unregister(&driver->drv); 1029 } 1030 1031 static int __init locomo_init(void) 1032 { 1033 int ret = bus_register(&locomo_bus_type); 1034 if (ret == 0) 1035 driver_register(&locomo_device_driver); 1036 return ret; 1037 } 1038 1039 static void __exit locomo_exit(void) 1040 { 1041 driver_unregister(&locomo_device_driver); 1042 bus_unregister(&locomo_bus_type); 1043 } 1044 1045 module_init(locomo_init); 1046 module_exit(locomo_exit); 1047 1048 MODULE_DESCRIPTION("Sharp LoCoMo core driver"); 1049 MODULE_LICENSE("GPL"); 1050 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); 1051 1052 EXPORT_SYMBOL(locomo_driver_register); 1053 EXPORT_SYMBOL(locomo_driver_unregister); 1054 EXPORT_SYMBOL(locomo_gpio_set_dir); 1055 EXPORT_SYMBOL(locomo_gpio_read_level); 1056 EXPORT_SYMBOL(locomo_gpio_read_output); 1057 EXPORT_SYMBOL(locomo_gpio_write); 1058 EXPORT_SYMBOL(locomo_m62332_senddata); 1059