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/io.h> 31 #include <asm/irq.h> 32 #include <asm/mach/irq.h> 33 34 #include <asm/hardware/locomo.h> 35 36 /* M62332 output channel selection */ 37 #define M62332_EVR_CH 1 /* M62332 volume channel number */ 38 /* 0 : CH.1 , 1 : CH. 2 */ 39 /* DAC send data */ 40 #define M62332_SLAVE_ADDR 0x4e /* Slave address */ 41 #define M62332_W_BIT 0x00 /* W bit (0 only) */ 42 #define M62332_SUB_ADDR 0x00 /* Sub address */ 43 #define M62332_A_BIT 0x00 /* A bit (0 only) */ 44 45 /* DAC setup and hold times (expressed in us) */ 46 #define DAC_BUS_FREE_TIME 5 /* 4.7 us */ 47 #define DAC_START_SETUP_TIME 5 /* 4.7 us */ 48 #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */ 49 #define DAC_START_HOLD_TIME 5 /* 4.7 us */ 50 #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */ 51 #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */ 52 #define DAC_DATA_SETUP_TIME 1 /* 250 ns */ 53 #define DAC_DATA_HOLD_TIME 1 /* 300 ns */ 54 #define DAC_LOW_SETUP_TIME 1 /* 300 ns */ 55 #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */ 56 57 /* the following is the overall data for the locomo chip */ 58 struct locomo { 59 struct device *dev; 60 unsigned long phys; 61 unsigned int irq; 62 spinlock_t lock; 63 void *base; 64 }; 65 66 struct locomo_dev_info { 67 unsigned long offset; 68 unsigned long length; 69 unsigned int devid; 70 unsigned int irq[1]; 71 const char * name; 72 }; 73 74 /* All the locomo devices. If offset is non-zero, the mapbase for the 75 * locomo_dev will be set to the chip base plus offset. If offset is 76 * zero, then the mapbase for the locomo_dev will be set to zero. An 77 * offset of zero means the device only uses GPIOs or other helper 78 * functions inside this file */ 79 static struct locomo_dev_info locomo_devices[] = { 80 { 81 .devid = LOCOMO_DEVID_KEYBOARD, 82 .irq = { 83 IRQ_LOCOMO_KEY, 84 }, 85 .name = "locomo-keyboard", 86 .offset = LOCOMO_KEYBOARD, 87 .length = 16, 88 }, 89 { 90 .devid = LOCOMO_DEVID_FRONTLIGHT, 91 .irq = {}, 92 .name = "locomo-frontlight", 93 .offset = LOCOMO_FRONTLIGHT, 94 .length = 8, 95 96 }, 97 { 98 .devid = LOCOMO_DEVID_BACKLIGHT, 99 .irq = {}, 100 .name = "locomo-backlight", 101 .offset = LOCOMO_BACKLIGHT, 102 .length = 8, 103 }, 104 { 105 .devid = LOCOMO_DEVID_AUDIO, 106 .irq = {}, 107 .name = "locomo-audio", 108 .offset = LOCOMO_AUDIO, 109 .length = 4, 110 }, 111 { 112 .devid = LOCOMO_DEVID_LED, 113 .irq = {}, 114 .name = "locomo-led", 115 .offset = LOCOMO_LED, 116 .length = 8, 117 }, 118 { 119 .devid = LOCOMO_DEVID_UART, 120 .irq = {}, 121 .name = "locomo-uart", 122 .offset = 0, 123 .length = 0, 124 }, 125 }; 126 127 128 /** LoCoMo interrupt handling stuff. 129 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs. 130 * that is, there is only one real hardware interrupt 131 * we determine which interrupt it is by reading some IO memory. 132 * We have two levels of expansion, first in the handler for the 133 * hardware interrupt we generate an interrupt 134 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts 135 * 136 * hardware irq reads LOCOMO_ICR & 0x0f00 137 * IRQ_LOCOMO_KEY_BASE 138 * IRQ_LOCOMO_GPIO_BASE 139 * IRQ_LOCOMO_LT_BASE 140 * IRQ_LOCOMO_SPI_BASE 141 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001 142 * IRQ_LOCOMO_KEY 143 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff 144 * IRQ_LOCOMO_GPIO[0-15] 145 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001 146 * IRQ_LOCOMO_LT 147 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F 148 * IRQ_LOCOMO_SPI_RFR 149 * IRQ_LOCOMO_SPI_RFW 150 * IRQ_LOCOMO_SPI_OVRN 151 * IRQ_LOCOMO_SPI_TEND 152 */ 153 154 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE) 155 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY) 156 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0) 157 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT) 158 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR) 159 160 static void locomo_handler(unsigned int irq, struct irqdesc *desc, 161 struct pt_regs *regs) 162 { 163 int req, i; 164 struct irqdesc *d; 165 void *mapbase = get_irq_chipdata(irq); 166 167 /* Acknowledge the parent IRQ */ 168 desc->chip->ack(irq); 169 170 /* check why this interrupt was generated */ 171 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00; 172 173 if (req) { 174 /* generate the next interrupt(s) */ 175 irq = LOCOMO_IRQ_START; 176 d = irq_desc + irq; 177 for (i = 0; i <= 3; i++, d++, irq++) { 178 if (req & (0x0100 << i)) { 179 desc_handle_irq(irq, d, regs); 180 } 181 182 } 183 } 184 } 185 186 static void locomo_ack_irq(unsigned int irq) 187 { 188 } 189 190 static void locomo_mask_irq(unsigned int irq) 191 { 192 void *mapbase = get_irq_chipdata(irq); 193 unsigned int r; 194 r = locomo_readl(mapbase + LOCOMO_ICR); 195 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START)); 196 locomo_writel(r, mapbase + LOCOMO_ICR); 197 } 198 199 static void locomo_unmask_irq(unsigned int irq) 200 { 201 void *mapbase = get_irq_chipdata(irq); 202 unsigned int r; 203 r = locomo_readl(mapbase + LOCOMO_ICR); 204 r |= (0x0010 << (irq - LOCOMO_IRQ_START)); 205 locomo_writel(r, mapbase + LOCOMO_ICR); 206 } 207 208 static struct irqchip locomo_chip = { 209 .ack = locomo_ack_irq, 210 .mask = locomo_mask_irq, 211 .unmask = locomo_unmask_irq, 212 }; 213 214 static void locomo_key_handler(unsigned int irq, struct irqdesc *desc, 215 struct pt_regs *regs) 216 { 217 struct irqdesc *d; 218 void *mapbase = get_irq_chipdata(irq); 219 220 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) { 221 d = irq_desc + LOCOMO_IRQ_KEY_START; 222 desc_handle_irq(LOCOMO_IRQ_KEY_START, d, regs); 223 } 224 } 225 226 static void locomo_key_ack_irq(unsigned int irq) 227 { 228 void *mapbase = get_irq_chipdata(irq); 229 unsigned int r; 230 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 231 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START)); 232 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 233 } 234 235 static void locomo_key_mask_irq(unsigned int irq) 236 { 237 void *mapbase = get_irq_chipdata(irq); 238 unsigned int r; 239 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 240 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 241 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 242 } 243 244 static void locomo_key_unmask_irq(unsigned int irq) 245 { 246 void *mapbase = get_irq_chipdata(irq); 247 unsigned int r; 248 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 249 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 250 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 251 } 252 253 static struct irqchip locomo_key_chip = { 254 .ack = locomo_key_ack_irq, 255 .mask = locomo_key_mask_irq, 256 .unmask = locomo_key_unmask_irq, 257 }; 258 259 static void locomo_gpio_handler(unsigned int irq, struct irqdesc *desc, 260 struct pt_regs *regs) 261 { 262 int req, i; 263 struct irqdesc *d; 264 void *mapbase = get_irq_chipdata(irq); 265 266 req = locomo_readl(mapbase + LOCOMO_GIR) & 267 locomo_readl(mapbase + LOCOMO_GPD) & 268 0xffff; 269 270 if (req) { 271 irq = LOCOMO_IRQ_GPIO_START; 272 d = irq_desc + LOCOMO_IRQ_GPIO_START; 273 for (i = 0; i <= 15; i++, irq++, d++) { 274 if (req & (0x0001 << i)) { 275 desc_handle_irq(irq, d, regs); 276 } 277 } 278 } 279 } 280 281 static void locomo_gpio_ack_irq(unsigned int irq) 282 { 283 void *mapbase = get_irq_chipdata(irq); 284 unsigned int r; 285 r = locomo_readl(mapbase + LOCOMO_GWE); 286 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 287 locomo_writel(r, mapbase + LOCOMO_GWE); 288 289 r = locomo_readl(mapbase + LOCOMO_GIS); 290 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 291 locomo_writel(r, mapbase + LOCOMO_GIS); 292 293 r = locomo_readl(mapbase + LOCOMO_GWE); 294 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 295 locomo_writel(r, mapbase + LOCOMO_GWE); 296 } 297 298 static void locomo_gpio_mask_irq(unsigned int irq) 299 { 300 void *mapbase = get_irq_chipdata(irq); 301 unsigned int r; 302 r = locomo_readl(mapbase + LOCOMO_GIE); 303 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 304 locomo_writel(r, mapbase + LOCOMO_GIE); 305 } 306 307 static void locomo_gpio_unmask_irq(unsigned int irq) 308 { 309 void *mapbase = get_irq_chipdata(irq); 310 unsigned int r; 311 r = locomo_readl(mapbase + LOCOMO_GIE); 312 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 313 locomo_writel(r, mapbase + LOCOMO_GIE); 314 } 315 316 static struct irqchip locomo_gpio_chip = { 317 .ack = locomo_gpio_ack_irq, 318 .mask = locomo_gpio_mask_irq, 319 .unmask = locomo_gpio_unmask_irq, 320 }; 321 322 static void locomo_lt_handler(unsigned int irq, struct irqdesc *desc, 323 struct pt_regs *regs) 324 { 325 struct irqdesc *d; 326 void *mapbase = get_irq_chipdata(irq); 327 328 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) { 329 d = irq_desc + LOCOMO_IRQ_LT_START; 330 desc_handle_irq(LOCOMO_IRQ_LT_START, d, regs); 331 } 332 } 333 334 static void locomo_lt_ack_irq(unsigned int irq) 335 { 336 void *mapbase = get_irq_chipdata(irq); 337 unsigned int r; 338 r = locomo_readl(mapbase + LOCOMO_LTINT); 339 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START)); 340 locomo_writel(r, mapbase + LOCOMO_LTINT); 341 } 342 343 static void locomo_lt_mask_irq(unsigned int irq) 344 { 345 void *mapbase = get_irq_chipdata(irq); 346 unsigned int r; 347 r = locomo_readl(mapbase + LOCOMO_LTINT); 348 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START)); 349 locomo_writel(r, mapbase + LOCOMO_LTINT); 350 } 351 352 static void locomo_lt_unmask_irq(unsigned int irq) 353 { 354 void *mapbase = get_irq_chipdata(irq); 355 unsigned int r; 356 r = locomo_readl(mapbase + LOCOMO_LTINT); 357 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START)); 358 locomo_writel(r, mapbase + LOCOMO_LTINT); 359 } 360 361 static struct irqchip locomo_lt_chip = { 362 .ack = locomo_lt_ack_irq, 363 .mask = locomo_lt_mask_irq, 364 .unmask = locomo_lt_unmask_irq, 365 }; 366 367 static void locomo_spi_handler(unsigned int irq, struct irqdesc *desc, 368 struct pt_regs *regs) 369 { 370 int req, i; 371 struct irqdesc *d; 372 void *mapbase = get_irq_chipdata(irq); 373 374 req = locomo_readl(mapbase + LOCOMO_SPIIR) & 0x000F; 375 if (req) { 376 irq = LOCOMO_IRQ_SPI_START; 377 d = irq_desc + irq; 378 379 for (i = 0; i <= 3; i++, irq++, d++) { 380 if (req & (0x0001 << i)) { 381 desc_handle_irq(irq, d, regs); 382 } 383 } 384 } 385 } 386 387 static void locomo_spi_ack_irq(unsigned int irq) 388 { 389 void *mapbase = get_irq_chipdata(irq); 390 unsigned int r; 391 r = locomo_readl(mapbase + LOCOMO_SPIWE); 392 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 393 locomo_writel(r, mapbase + LOCOMO_SPIWE); 394 395 r = locomo_readl(mapbase + LOCOMO_SPIIS); 396 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 397 locomo_writel(r, mapbase + LOCOMO_SPIIS); 398 399 r = locomo_readl(mapbase + LOCOMO_SPIWE); 400 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 401 locomo_writel(r, mapbase + LOCOMO_SPIWE); 402 } 403 404 static void locomo_spi_mask_irq(unsigned int irq) 405 { 406 void *mapbase = get_irq_chipdata(irq); 407 unsigned int r; 408 r = locomo_readl(mapbase + LOCOMO_SPIIE); 409 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 410 locomo_writel(r, mapbase + LOCOMO_SPIIE); 411 } 412 413 static void locomo_spi_unmask_irq(unsigned int irq) 414 { 415 void *mapbase = get_irq_chipdata(irq); 416 unsigned int r; 417 r = locomo_readl(mapbase + LOCOMO_SPIIE); 418 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 419 locomo_writel(r, mapbase + LOCOMO_SPIIE); 420 } 421 422 static struct irqchip locomo_spi_chip = { 423 .ack = locomo_spi_ack_irq, 424 .mask = locomo_spi_mask_irq, 425 .unmask = locomo_spi_unmask_irq, 426 }; 427 428 static void locomo_setup_irq(struct locomo *lchip) 429 { 430 int irq; 431 void *irqbase = lchip->base; 432 433 /* 434 * Install handler for IRQ_LOCOMO_HW. 435 */ 436 set_irq_type(lchip->irq, IRQT_FALLING); 437 set_irq_chipdata(lchip->irq, irqbase); 438 set_irq_chained_handler(lchip->irq, locomo_handler); 439 440 /* Install handlers for IRQ_LOCOMO_*_BASE */ 441 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip); 442 set_irq_chipdata(IRQ_LOCOMO_KEY_BASE, irqbase); 443 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler); 444 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE); 445 446 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip); 447 set_irq_chipdata(IRQ_LOCOMO_GPIO_BASE, irqbase); 448 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler); 449 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE); 450 451 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip); 452 set_irq_chipdata(IRQ_LOCOMO_LT_BASE, irqbase); 453 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler); 454 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE); 455 456 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip); 457 set_irq_chipdata(IRQ_LOCOMO_SPI_BASE, irqbase); 458 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler); 459 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE); 460 461 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */ 462 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip); 463 set_irq_chipdata(LOCOMO_IRQ_KEY_START, irqbase); 464 set_irq_handler(LOCOMO_IRQ_KEY_START, do_edge_IRQ); 465 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE); 466 467 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */ 468 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) { 469 set_irq_chip(irq, &locomo_gpio_chip); 470 set_irq_chipdata(irq, irqbase); 471 set_irq_handler(irq, do_edge_IRQ); 472 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 473 } 474 475 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */ 476 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip); 477 set_irq_chipdata(LOCOMO_IRQ_LT_START, irqbase); 478 set_irq_handler(LOCOMO_IRQ_LT_START, do_edge_IRQ); 479 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE); 480 481 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */ 482 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) { 483 set_irq_chip(irq, &locomo_spi_chip); 484 set_irq_chipdata(irq, irqbase); 485 set_irq_handler(irq, do_edge_IRQ); 486 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 487 } 488 } 489 490 491 static void locomo_dev_release(struct device *_dev) 492 { 493 struct locomo_dev *dev = LOCOMO_DEV(_dev); 494 495 kfree(dev); 496 } 497 498 static int 499 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) 500 { 501 struct locomo_dev *dev; 502 int ret; 503 504 dev = kmalloc(sizeof(struct locomo_dev), GFP_KERNEL); 505 if (!dev) { 506 ret = -ENOMEM; 507 goto out; 508 } 509 memset(dev, 0, sizeof(struct locomo_dev)); 510 511 strncpy(dev->dev.bus_id,info->name,sizeof(dev->dev.bus_id)); 512 /* 513 * If the parent device has a DMA mask associated with it, 514 * propagate it down to the children. 515 */ 516 if (lchip->dev->dma_mask) { 517 dev->dma_mask = *lchip->dev->dma_mask; 518 dev->dev.dma_mask = &dev->dma_mask; 519 } 520 521 dev->devid = info->devid; 522 dev->dev.parent = lchip->dev; 523 dev->dev.bus = &locomo_bus_type; 524 dev->dev.release = locomo_dev_release; 525 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; 526 527 if (info->offset) 528 dev->mapbase = lchip->base + info->offset; 529 else 530 dev->mapbase = 0; 531 dev->length = info->length; 532 533 memmove(dev->irq, info->irq, sizeof(dev->irq)); 534 535 ret = device_register(&dev->dev); 536 if (ret) { 537 out: 538 kfree(dev); 539 } 540 return ret; 541 } 542 543 #ifdef CONFIG_PM 544 545 struct locomo_save_data { 546 u16 LCM_GPO; 547 u16 LCM_SPICT; 548 u16 LCM_GPE; 549 u16 LCM_ASD; 550 u16 LCM_SPIMD; 551 }; 552 553 static int locomo_suspend(struct device *dev, pm_message_t state, u32 level) 554 { 555 struct locomo *lchip = dev_get_drvdata(dev); 556 struct locomo_save_data *save; 557 unsigned long flags; 558 559 if (level != SUSPEND_DISABLE) 560 return 0; 561 562 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL); 563 if (!save) 564 return -ENOMEM; 565 566 dev->power.saved_state = (void *) save; 567 568 spin_lock_irqsave(&lchip->lock, flags); 569 570 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */ 571 locomo_writel(0x00, lchip->base + LOCOMO_GPO); 572 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */ 573 locomo_writel(0x40, lchip->base + LOCOMO_SPICT); 574 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */ 575 locomo_writel(0x00, lchip->base + LOCOMO_GPE); 576 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */ 577 locomo_writel(0x00, lchip->base + LOCOMO_ASD); 578 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */ 579 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD); 580 581 locomo_writel(0x00, lchip->base + LOCOMO_PAIF); 582 locomo_writel(0x00, lchip->base + LOCOMO_DAC); 583 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC); 584 585 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) ) 586 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */ 587 else 588 /* 18MHz already enabled, so no wait */ 589 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */ 590 591 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/ 592 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */ 593 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */ 594 595 spin_unlock_irqrestore(&lchip->lock, flags); 596 597 return 0; 598 } 599 600 static int locomo_resume(struct device *dev, u32 level) 601 { 602 struct locomo *lchip = dev_get_drvdata(dev); 603 struct locomo_save_data *save; 604 unsigned long r; 605 unsigned long flags; 606 607 if (level != RESUME_ENABLE) 608 return 0; 609 610 save = (struct locomo_save_data *) dev->power.saved_state; 611 if (!save) 612 return 0; 613 614 spin_lock_irqsave(&lchip->lock, flags); 615 616 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO); 617 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT); 618 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE); 619 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD); 620 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD); 621 622 locomo_writel(0x00, lchip->base + LOCOMO_C32K); 623 locomo_writel(0x90, lchip->base + LOCOMO_TADC); 624 625 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC); 626 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 627 r &= 0xFEFF; 628 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 629 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD); 630 631 spin_unlock_irqrestore(&lchip->lock, flags); 632 633 dev->power.saved_state = NULL; 634 kfree(save); 635 636 return 0; 637 } 638 #endif 639 640 /** 641 * locomo_probe - probe for a single LoCoMo chip. 642 * @phys_addr: physical address of device. 643 * 644 * Probe for a LoCoMo chip. This must be called 645 * before any other locomo-specific code. 646 * 647 * Returns: 648 * %-ENODEV device not found. 649 * %-EBUSY physical address already marked in-use. 650 * %0 successful. 651 */ 652 static int 653 __locomo_probe(struct device *me, struct resource *mem, int irq) 654 { 655 struct locomo *lchip; 656 unsigned long r; 657 int i, ret = -ENODEV; 658 659 lchip = kmalloc(sizeof(struct locomo), GFP_KERNEL); 660 if (!lchip) 661 return -ENOMEM; 662 663 memset(lchip, 0, sizeof(struct locomo)); 664 665 spin_lock_init(&lchip->lock); 666 667 lchip->dev = me; 668 dev_set_drvdata(lchip->dev, lchip); 669 670 lchip->phys = mem->start; 671 lchip->irq = irq; 672 673 /* 674 * Map the whole region. This also maps the 675 * registers for our children. 676 */ 677 lchip->base = ioremap(mem->start, PAGE_SIZE); 678 if (!lchip->base) { 679 ret = -ENOMEM; 680 goto out; 681 } 682 683 /* locomo initialize */ 684 locomo_writel(0, lchip->base + LOCOMO_ICR); 685 /* KEYBOARD */ 686 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 687 688 /* GPIO */ 689 locomo_writel(0, lchip->base + LOCOMO_GPO); 690 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 691 , lchip->base + LOCOMO_GPE); 692 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 693 , lchip->base + LOCOMO_GPD); 694 locomo_writel(0, lchip->base + LOCOMO_GIE); 695 696 /* FrontLight */ 697 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); 698 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); 699 /* Longtime timer */ 700 locomo_writel(0, lchip->base + LOCOMO_LTINT); 701 /* SPI */ 702 locomo_writel(0, lchip->base + LOCOMO_SPIIE); 703 704 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); 705 r = locomo_readl(lchip->base + LOCOMO_ASD); 706 r |= 0x8000; 707 locomo_writel(r, lchip->base + LOCOMO_ASD); 708 709 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); 710 r = locomo_readl(lchip->base + LOCOMO_HSD); 711 r |= 0x8000; 712 locomo_writel(r, lchip->base + LOCOMO_HSD); 713 714 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); 715 716 /* XON */ 717 locomo_writel(0x80, lchip->base + LOCOMO_TADC); 718 udelay(1000); 719 /* CLK9MEN */ 720 r = locomo_readl(lchip->base + LOCOMO_TADC); 721 r |= 0x10; 722 locomo_writel(r, lchip->base + LOCOMO_TADC); 723 udelay(100); 724 725 /* init DAC */ 726 r = locomo_readl(lchip->base + LOCOMO_DAC); 727 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 728 locomo_writel(r, lchip->base + LOCOMO_DAC); 729 730 r = locomo_readl(lchip->base + LOCOMO_VER); 731 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); 732 733 /* 734 * The interrupt controller must be initialised before any 735 * other device to ensure that the interrupts are available. 736 */ 737 if (lchip->irq != NO_IRQ) 738 locomo_setup_irq(lchip); 739 740 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) 741 locomo_init_one_child(lchip, &locomo_devices[i]); 742 743 return 0; 744 745 out: 746 kfree(lchip); 747 return ret; 748 } 749 750 static int locomo_remove_child(struct device *dev, void *data) 751 { 752 device_unregister(dev); 753 return 0; 754 } 755 756 static void __locomo_remove(struct locomo *lchip) 757 { 758 device_for_each_child(lchip->dev, NULL, locomo_remove_child); 759 760 if (lchip->irq != NO_IRQ) { 761 set_irq_chained_handler(lchip->irq, NULL); 762 set_irq_data(lchip->irq, NULL); 763 } 764 765 iounmap(lchip->base); 766 kfree(lchip); 767 } 768 769 static int locomo_probe(struct device *dev) 770 { 771 struct platform_device *pdev = to_platform_device(dev); 772 struct resource *mem; 773 int irq; 774 775 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 776 if (!mem) 777 return -EINVAL; 778 irq = platform_get_irq(pdev, 0); 779 780 return __locomo_probe(dev, mem, irq); 781 } 782 783 static int locomo_remove(struct device *dev) 784 { 785 struct locomo *lchip = dev_get_drvdata(dev); 786 787 if (lchip) { 788 __locomo_remove(lchip); 789 dev_set_drvdata(dev, NULL); 790 } 791 792 return 0; 793 } 794 795 /* 796 * Not sure if this should be on the system bus or not yet. 797 * We really want some way to register a system device at 798 * the per-machine level, and then have this driver pick 799 * up the registered devices. 800 */ 801 static struct device_driver locomo_device_driver = { 802 .name = "locomo", 803 .bus = &platform_bus_type, 804 .probe = locomo_probe, 805 .remove = locomo_remove, 806 #ifdef CONFIG_PM 807 .suspend = locomo_suspend, 808 .resume = locomo_resume, 809 #endif 810 }; 811 812 /* 813 * Get the parent device driver (us) structure 814 * from a child function device 815 */ 816 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) 817 { 818 return (struct locomo *)dev_get_drvdata(ldev->dev.parent); 819 } 820 821 void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir) 822 { 823 struct locomo *lchip = locomo_chip_driver(ldev); 824 unsigned long flags; 825 unsigned int r; 826 827 spin_lock_irqsave(&lchip->lock, flags); 828 829 r = locomo_readl(lchip->base + LOCOMO_GPD); 830 r &= ~bits; 831 locomo_writel(r, lchip->base + LOCOMO_GPD); 832 833 r = locomo_readl(lchip->base + LOCOMO_GPE); 834 if (dir) 835 r |= bits; 836 else 837 r &= ~bits; 838 locomo_writel(r, lchip->base + LOCOMO_GPE); 839 840 spin_unlock_irqrestore(&lchip->lock, flags); 841 } 842 843 unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits) 844 { 845 struct locomo *lchip = locomo_chip_driver(ldev); 846 unsigned long flags; 847 unsigned int ret; 848 849 spin_lock_irqsave(&lchip->lock, flags); 850 ret = locomo_readl(lchip->base + LOCOMO_GPL); 851 spin_unlock_irqrestore(&lchip->lock, flags); 852 853 ret &= bits; 854 return ret; 855 } 856 857 unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits) 858 { 859 struct locomo *lchip = locomo_chip_driver(ldev); 860 unsigned long flags; 861 unsigned int ret; 862 863 spin_lock_irqsave(&lchip->lock, flags); 864 ret = locomo_readl(lchip->base + LOCOMO_GPO); 865 spin_unlock_irqrestore(&lchip->lock, flags); 866 867 ret &= bits; 868 return ret; 869 } 870 871 void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set) 872 { 873 struct locomo *lchip = locomo_chip_driver(ldev); 874 unsigned long flags; 875 unsigned int r; 876 877 spin_lock_irqsave(&lchip->lock, flags); 878 879 r = locomo_readl(lchip->base + LOCOMO_GPO); 880 if (set) 881 r |= bits; 882 else 883 r &= ~bits; 884 locomo_writel(r, lchip->base + LOCOMO_GPO); 885 886 spin_unlock_irqrestore(&lchip->lock, flags); 887 } 888 889 static void locomo_m62332_sendbit(void *mapbase, int bit) 890 { 891 unsigned int r; 892 893 r = locomo_readl(mapbase + LOCOMO_DAC); 894 r &= ~(LOCOMO_DAC_SCLOEB); 895 locomo_writel(r, mapbase + LOCOMO_DAC); 896 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 897 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 898 r = locomo_readl(mapbase + LOCOMO_DAC); 899 r &= ~(LOCOMO_DAC_SCLOEB); 900 locomo_writel(r, mapbase + LOCOMO_DAC); 901 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 902 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 903 904 if (bit & 1) { 905 r = locomo_readl(mapbase + LOCOMO_DAC); 906 r |= LOCOMO_DAC_SDAOEB; 907 locomo_writel(r, mapbase + LOCOMO_DAC); 908 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 909 } else { 910 r = locomo_readl(mapbase + LOCOMO_DAC); 911 r &= ~(LOCOMO_DAC_SDAOEB); 912 locomo_writel(r, mapbase + LOCOMO_DAC); 913 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 914 } 915 916 udelay(DAC_DATA_SETUP_TIME); /* 250 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); /* 4.0 usec */ 922 } 923 924 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) 925 { 926 struct locomo *lchip = locomo_chip_driver(ldev); 927 int i; 928 unsigned char data; 929 unsigned int r; 930 void *mapbase = lchip->base; 931 unsigned long flags; 932 933 spin_lock_irqsave(&lchip->lock, flags); 934 935 /* Start */ 936 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ 937 r = locomo_readl(mapbase + LOCOMO_DAC); 938 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 939 locomo_writel(r, mapbase + LOCOMO_DAC); 940 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 941 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 942 r = locomo_readl(mapbase + LOCOMO_DAC); 943 r &= ~(LOCOMO_DAC_SDAOEB); 944 locomo_writel(r, mapbase + LOCOMO_DAC); 945 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ 946 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 947 948 /* Send slave address and W bit (LSB is W bit) */ 949 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; 950 for (i = 1; i <= 8; i++) { 951 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 952 } 953 954 /* Check A bit */ 955 r = locomo_readl(mapbase + LOCOMO_DAC); 956 r &= ~(LOCOMO_DAC_SCLOEB); 957 locomo_writel(r, mapbase + LOCOMO_DAC); 958 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 959 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 960 r = locomo_readl(mapbase + LOCOMO_DAC); 961 r &= ~(LOCOMO_DAC_SDAOEB); 962 locomo_writel(r, mapbase + LOCOMO_DAC); 963 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 964 r = locomo_readl(mapbase + LOCOMO_DAC); 965 r |= LOCOMO_DAC_SCLOEB; 966 locomo_writel(r, mapbase + LOCOMO_DAC); 967 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 968 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 969 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 970 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); 971 return; 972 } 973 974 /* Send Sub address (LSB is channel select) */ 975 /* channel = 0 : ch1 select */ 976 /* = 1 : ch2 select */ 977 data = M62332_SUB_ADDR + channel; 978 for (i = 1; i <= 8; i++) { 979 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 980 } 981 982 /* Check A bit */ 983 r = locomo_readl(mapbase + LOCOMO_DAC); 984 r &= ~(LOCOMO_DAC_SCLOEB); 985 locomo_writel(r, mapbase + LOCOMO_DAC); 986 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 987 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 988 r = locomo_readl(mapbase + LOCOMO_DAC); 989 r &= ~(LOCOMO_DAC_SDAOEB); 990 locomo_writel(r, mapbase + LOCOMO_DAC); 991 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 992 r = locomo_readl(mapbase + LOCOMO_DAC); 993 r |= LOCOMO_DAC_SCLOEB; 994 locomo_writel(r, mapbase + LOCOMO_DAC); 995 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 996 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 997 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 998 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); 999 return; 1000 } 1001 1002 /* Send DAC data */ 1003 for (i = 1; i <= 8; i++) { 1004 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); 1005 } 1006 1007 /* Check A bit */ 1008 r = locomo_readl(mapbase + LOCOMO_DAC); 1009 r &= ~(LOCOMO_DAC_SCLOEB); 1010 locomo_writel(r, mapbase + LOCOMO_DAC); 1011 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1012 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1013 r = locomo_readl(mapbase + LOCOMO_DAC); 1014 r &= ~(LOCOMO_DAC_SDAOEB); 1015 locomo_writel(r, mapbase + LOCOMO_DAC); 1016 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1017 r = locomo_readl(mapbase + LOCOMO_DAC); 1018 r |= LOCOMO_DAC_SCLOEB; 1019 locomo_writel(r, mapbase + LOCOMO_DAC); 1020 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1021 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 1022 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 1023 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); 1024 return; 1025 } 1026 1027 /* stop */ 1028 r = locomo_readl(mapbase + LOCOMO_DAC); 1029 r &= ~(LOCOMO_DAC_SCLOEB); 1030 locomo_writel(r, mapbase + LOCOMO_DAC); 1031 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1032 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1033 r = locomo_readl(mapbase + LOCOMO_DAC); 1034 r |= LOCOMO_DAC_SCLOEB; 1035 locomo_writel(r, mapbase + LOCOMO_DAC); 1036 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1037 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1038 r = locomo_readl(mapbase + LOCOMO_DAC); 1039 r |= LOCOMO_DAC_SDAOEB; 1040 locomo_writel(r, mapbase + LOCOMO_DAC); 1041 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1042 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1043 1044 r = locomo_readl(mapbase + LOCOMO_DAC); 1045 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 1046 locomo_writel(r, mapbase + LOCOMO_DAC); 1047 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ 1048 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1049 1050 spin_unlock_irqrestore(&lchip->lock, flags); 1051 } 1052 1053 /* 1054 * LoCoMo "Register Access Bus." 1055 * 1056 * We model this as a regular bus type, and hang devices directly 1057 * off this. 1058 */ 1059 static int locomo_match(struct device *_dev, struct device_driver *_drv) 1060 { 1061 struct locomo_dev *dev = LOCOMO_DEV(_dev); 1062 struct locomo_driver *drv = LOCOMO_DRV(_drv); 1063 1064 return dev->devid == drv->devid; 1065 } 1066 1067 static int locomo_bus_suspend(struct device *dev, pm_message_t state) 1068 { 1069 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1070 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1071 int ret = 0; 1072 1073 if (drv && drv->suspend) 1074 ret = drv->suspend(ldev, state); 1075 return ret; 1076 } 1077 1078 static int locomo_bus_resume(struct device *dev) 1079 { 1080 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1081 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1082 int ret = 0; 1083 1084 if (drv && drv->resume) 1085 ret = drv->resume(ldev); 1086 return ret; 1087 } 1088 1089 static int locomo_bus_probe(struct device *dev) 1090 { 1091 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1092 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1093 int ret = -ENODEV; 1094 1095 if (drv->probe) 1096 ret = drv->probe(ldev); 1097 return ret; 1098 } 1099 1100 static int locomo_bus_remove(struct device *dev) 1101 { 1102 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1103 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1104 int ret = 0; 1105 1106 if (drv->remove) 1107 ret = drv->remove(ldev); 1108 return ret; 1109 } 1110 1111 struct bus_type locomo_bus_type = { 1112 .name = "locomo-bus", 1113 .match = locomo_match, 1114 .suspend = locomo_bus_suspend, 1115 .resume = locomo_bus_resume, 1116 }; 1117 1118 int locomo_driver_register(struct locomo_driver *driver) 1119 { 1120 driver->drv.probe = locomo_bus_probe; 1121 driver->drv.remove = locomo_bus_remove; 1122 driver->drv.bus = &locomo_bus_type; 1123 return driver_register(&driver->drv); 1124 } 1125 1126 void locomo_driver_unregister(struct locomo_driver *driver) 1127 { 1128 driver_unregister(&driver->drv); 1129 } 1130 1131 static int __init locomo_init(void) 1132 { 1133 int ret = bus_register(&locomo_bus_type); 1134 if (ret == 0) 1135 driver_register(&locomo_device_driver); 1136 return ret; 1137 } 1138 1139 static void __exit locomo_exit(void) 1140 { 1141 driver_unregister(&locomo_device_driver); 1142 bus_unregister(&locomo_bus_type); 1143 } 1144 1145 module_init(locomo_init); 1146 module_exit(locomo_exit); 1147 1148 MODULE_DESCRIPTION("Sharp LoCoMo core driver"); 1149 MODULE_LICENSE("GPL"); 1150 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); 1151 1152 EXPORT_SYMBOL(locomo_driver_register); 1153 EXPORT_SYMBOL(locomo_driver_unregister); 1154 EXPORT_SYMBOL(locomo_gpio_set_dir); 1155 EXPORT_SYMBOL(locomo_gpio_read_level); 1156 EXPORT_SYMBOL(locomo_gpio_read_output); 1157 EXPORT_SYMBOL(locomo_gpio_write); 1158 EXPORT_SYMBOL(locomo_m62332_senddata); 1159