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 desc_handle_irq(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 desc_handle_irq(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 desc_handle_irq(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 desc_handle_irq(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 desc_handle_irq(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 #ifdef CONFIG_PM 545 546 struct locomo_save_data { 547 u16 LCM_GPO; 548 u16 LCM_SPICT; 549 u16 LCM_GPE; 550 u16 LCM_ASD; 551 u16 LCM_SPIMD; 552 }; 553 554 static int locomo_suspend(struct device *dev, pm_message_t state, u32 level) 555 { 556 struct locomo *lchip = dev_get_drvdata(dev); 557 struct locomo_save_data *save; 558 unsigned long flags; 559 560 if (level != SUSPEND_DISABLE) 561 return 0; 562 563 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL); 564 if (!save) 565 return -ENOMEM; 566 567 dev->power.saved_state = (void *) save; 568 569 spin_lock_irqsave(&lchip->lock, flags); 570 571 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */ 572 locomo_writel(0x00, lchip->base + LOCOMO_GPO); 573 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */ 574 locomo_writel(0x40, lchip->base + LOCOMO_SPICT); 575 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */ 576 locomo_writel(0x00, lchip->base + LOCOMO_GPE); 577 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */ 578 locomo_writel(0x00, lchip->base + LOCOMO_ASD); 579 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */ 580 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD); 581 582 locomo_writel(0x00, lchip->base + LOCOMO_PAIF); 583 locomo_writel(0x00, lchip->base + LOCOMO_DAC); 584 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC); 585 586 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) ) 587 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */ 588 else 589 /* 18MHz already enabled, so no wait */ 590 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */ 591 592 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/ 593 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */ 594 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */ 595 596 spin_unlock_irqrestore(&lchip->lock, flags); 597 598 return 0; 599 } 600 601 static int locomo_resume(struct device *dev, u32 level) 602 { 603 struct locomo *lchip = dev_get_drvdata(dev); 604 struct locomo_save_data *save; 605 unsigned long r; 606 unsigned long flags; 607 608 if (level != RESUME_ENABLE) 609 return 0; 610 611 save = (struct locomo_save_data *) dev->power.saved_state; 612 if (!save) 613 return 0; 614 615 spin_lock_irqsave(&lchip->lock, flags); 616 617 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO); 618 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT); 619 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE); 620 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD); 621 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD); 622 623 locomo_writel(0x00, lchip->base + LOCOMO_C32K); 624 locomo_writel(0x90, lchip->base + LOCOMO_TADC); 625 626 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC); 627 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 628 r &= 0xFEFF; 629 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 630 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD); 631 632 spin_unlock_irqrestore(&lchip->lock, flags); 633 634 dev->power.saved_state = NULL; 635 kfree(save); 636 637 return 0; 638 } 639 #endif 640 641 /** 642 * locomo_probe - probe for a single LoCoMo chip. 643 * @phys_addr: physical address of device. 644 * 645 * Probe for a LoCoMo chip. This must be called 646 * before any other locomo-specific code. 647 * 648 * Returns: 649 * %-ENODEV device not found. 650 * %-EBUSY physical address already marked in-use. 651 * %0 successful. 652 */ 653 static int 654 __locomo_probe(struct device *me, struct resource *mem, int irq) 655 { 656 struct locomo *lchip; 657 unsigned long r; 658 int i, ret = -ENODEV; 659 660 lchip = kmalloc(sizeof(struct locomo), GFP_KERNEL); 661 if (!lchip) 662 return -ENOMEM; 663 664 memset(lchip, 0, sizeof(struct locomo)); 665 666 spin_lock_init(&lchip->lock); 667 668 lchip->dev = me; 669 dev_set_drvdata(lchip->dev, lchip); 670 671 lchip->phys = mem->start; 672 lchip->irq = irq; 673 674 /* 675 * Map the whole region. This also maps the 676 * registers for our children. 677 */ 678 lchip->base = ioremap(mem->start, PAGE_SIZE); 679 if (!lchip->base) { 680 ret = -ENOMEM; 681 goto out; 682 } 683 684 /* locomo initialize */ 685 locomo_writel(0, lchip->base + LOCOMO_ICR); 686 /* KEYBOARD */ 687 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 688 689 /* GPIO */ 690 locomo_writel(0, lchip->base + LOCOMO_GPO); 691 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 692 , lchip->base + LOCOMO_GPE); 693 locomo_writel( (LOCOMO_GPIO(2) | LOCOMO_GPIO(3) | LOCOMO_GPIO(13) | LOCOMO_GPIO(14)) 694 , lchip->base + LOCOMO_GPD); 695 locomo_writel(0, lchip->base + LOCOMO_GIE); 696 697 /* FrontLight */ 698 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); 699 locomo_writel(0, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); 700 /* Longtime timer */ 701 locomo_writel(0, lchip->base + LOCOMO_LTINT); 702 /* SPI */ 703 locomo_writel(0, lchip->base + LOCOMO_SPIIE); 704 705 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); 706 r = locomo_readl(lchip->base + LOCOMO_ASD); 707 r |= 0x8000; 708 locomo_writel(r, lchip->base + LOCOMO_ASD); 709 710 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); 711 r = locomo_readl(lchip->base + LOCOMO_HSD); 712 r |= 0x8000; 713 locomo_writel(r, lchip->base + LOCOMO_HSD); 714 715 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); 716 717 /* XON */ 718 locomo_writel(0x80, lchip->base + LOCOMO_TADC); 719 udelay(1000); 720 /* CLK9MEN */ 721 r = locomo_readl(lchip->base + LOCOMO_TADC); 722 r |= 0x10; 723 locomo_writel(r, lchip->base + LOCOMO_TADC); 724 udelay(100); 725 726 /* init DAC */ 727 r = locomo_readl(lchip->base + LOCOMO_DAC); 728 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 729 locomo_writel(r, lchip->base + LOCOMO_DAC); 730 731 r = locomo_readl(lchip->base + LOCOMO_VER); 732 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); 733 734 /* 735 * The interrupt controller must be initialised before any 736 * other device to ensure that the interrupts are available. 737 */ 738 if (lchip->irq != NO_IRQ) 739 locomo_setup_irq(lchip); 740 741 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) 742 locomo_init_one_child(lchip, &locomo_devices[i]); 743 744 return 0; 745 746 out: 747 kfree(lchip); 748 return ret; 749 } 750 751 static int locomo_remove_child(struct device *dev, void *data) 752 { 753 device_unregister(dev); 754 return 0; 755 } 756 757 static void __locomo_remove(struct locomo *lchip) 758 { 759 device_for_each_child(lchip->dev, NULL, locomo_remove_child); 760 761 if (lchip->irq != NO_IRQ) { 762 set_irq_chained_handler(lchip->irq, NULL); 763 set_irq_data(lchip->irq, NULL); 764 } 765 766 iounmap(lchip->base); 767 kfree(lchip); 768 } 769 770 static int locomo_probe(struct device *dev) 771 { 772 struct platform_device *pdev = to_platform_device(dev); 773 struct resource *mem; 774 int irq; 775 776 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 777 if (!mem) 778 return -EINVAL; 779 irq = platform_get_irq(pdev, 0); 780 781 return __locomo_probe(dev, mem, irq); 782 } 783 784 static int locomo_remove(struct device *dev) 785 { 786 struct locomo *lchip = dev_get_drvdata(dev); 787 788 if (lchip) { 789 __locomo_remove(lchip); 790 dev_set_drvdata(dev, NULL); 791 } 792 793 return 0; 794 } 795 796 /* 797 * Not sure if this should be on the system bus or not yet. 798 * We really want some way to register a system device at 799 * the per-machine level, and then have this driver pick 800 * up the registered devices. 801 */ 802 static struct device_driver locomo_device_driver = { 803 .name = "locomo", 804 .bus = &platform_bus_type, 805 .probe = locomo_probe, 806 .remove = locomo_remove, 807 #ifdef CONFIG_PM 808 .suspend = locomo_suspend, 809 .resume = locomo_resume, 810 #endif 811 }; 812 813 /* 814 * Get the parent device driver (us) structure 815 * from a child function device 816 */ 817 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) 818 { 819 return (struct locomo *)dev_get_drvdata(ldev->dev.parent); 820 } 821 822 void locomo_gpio_set_dir(struct locomo_dev *ldev, unsigned int bits, unsigned int dir) 823 { 824 struct locomo *lchip = locomo_chip_driver(ldev); 825 unsigned long flags; 826 unsigned int r; 827 828 spin_lock_irqsave(&lchip->lock, flags); 829 830 r = locomo_readl(lchip->base + LOCOMO_GPD); 831 r &= ~bits; 832 locomo_writel(r, lchip->base + LOCOMO_GPD); 833 834 r = locomo_readl(lchip->base + LOCOMO_GPE); 835 if (dir) 836 r |= bits; 837 else 838 r &= ~bits; 839 locomo_writel(r, lchip->base + LOCOMO_GPE); 840 841 spin_unlock_irqrestore(&lchip->lock, flags); 842 } 843 844 unsigned int locomo_gpio_read_level(struct locomo_dev *ldev, unsigned int bits) 845 { 846 struct locomo *lchip = locomo_chip_driver(ldev); 847 unsigned long flags; 848 unsigned int ret; 849 850 spin_lock_irqsave(&lchip->lock, flags); 851 ret = locomo_readl(lchip->base + LOCOMO_GPL); 852 spin_unlock_irqrestore(&lchip->lock, flags); 853 854 ret &= bits; 855 return ret; 856 } 857 858 unsigned int locomo_gpio_read_output(struct locomo_dev *ldev, unsigned int bits) 859 { 860 struct locomo *lchip = locomo_chip_driver(ldev); 861 unsigned long flags; 862 unsigned int ret; 863 864 spin_lock_irqsave(&lchip->lock, flags); 865 ret = locomo_readl(lchip->base + LOCOMO_GPO); 866 spin_unlock_irqrestore(&lchip->lock, flags); 867 868 ret &= bits; 869 return ret; 870 } 871 872 void locomo_gpio_write(struct locomo_dev *ldev, unsigned int bits, unsigned int set) 873 { 874 struct locomo *lchip = locomo_chip_driver(ldev); 875 unsigned long flags; 876 unsigned int r; 877 878 spin_lock_irqsave(&lchip->lock, flags); 879 880 r = locomo_readl(lchip->base + LOCOMO_GPO); 881 if (set) 882 r |= bits; 883 else 884 r &= ~bits; 885 locomo_writel(r, lchip->base + LOCOMO_GPO); 886 887 spin_unlock_irqrestore(&lchip->lock, flags); 888 } 889 890 static void locomo_m62332_sendbit(void *mapbase, int bit) 891 { 892 unsigned int r; 893 894 r = locomo_readl(mapbase + LOCOMO_DAC); 895 r &= ~(LOCOMO_DAC_SCLOEB); 896 locomo_writel(r, mapbase + LOCOMO_DAC); 897 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 898 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 899 r = locomo_readl(mapbase + LOCOMO_DAC); 900 r &= ~(LOCOMO_DAC_SCLOEB); 901 locomo_writel(r, mapbase + LOCOMO_DAC); 902 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 903 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 904 905 if (bit & 1) { 906 r = locomo_readl(mapbase + LOCOMO_DAC); 907 r |= LOCOMO_DAC_SDAOEB; 908 locomo_writel(r, mapbase + LOCOMO_DAC); 909 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 910 } else { 911 r = locomo_readl(mapbase + LOCOMO_DAC); 912 r &= ~(LOCOMO_DAC_SDAOEB); 913 locomo_writel(r, mapbase + LOCOMO_DAC); 914 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 915 } 916 917 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ 918 r = locomo_readl(mapbase + LOCOMO_DAC); 919 r |= LOCOMO_DAC_SCLOEB; 920 locomo_writel(r, mapbase + LOCOMO_DAC); 921 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 922 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 923 } 924 925 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) 926 { 927 struct locomo *lchip = locomo_chip_driver(ldev); 928 int i; 929 unsigned char data; 930 unsigned int r; 931 void *mapbase = lchip->base; 932 unsigned long flags; 933 934 spin_lock_irqsave(&lchip->lock, flags); 935 936 /* Start */ 937 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ 938 r = locomo_readl(mapbase + LOCOMO_DAC); 939 r |= LOCOMO_DAC_SCLOEB | 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); /* 4.0 usec */ 943 r = locomo_readl(mapbase + LOCOMO_DAC); 944 r &= ~(LOCOMO_DAC_SDAOEB); 945 locomo_writel(r, mapbase + LOCOMO_DAC); 946 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ 947 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 948 949 /* Send slave address and W bit (LSB is W bit) */ 950 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; 951 for (i = 1; i <= 8; i++) { 952 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 953 } 954 955 /* Check A bit */ 956 r = locomo_readl(mapbase + LOCOMO_DAC); 957 r &= ~(LOCOMO_DAC_SCLOEB); 958 locomo_writel(r, mapbase + LOCOMO_DAC); 959 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 960 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 961 r = locomo_readl(mapbase + LOCOMO_DAC); 962 r &= ~(LOCOMO_DAC_SDAOEB); 963 locomo_writel(r, mapbase + LOCOMO_DAC); 964 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 965 r = locomo_readl(mapbase + LOCOMO_DAC); 966 r |= LOCOMO_DAC_SCLOEB; 967 locomo_writel(r, mapbase + LOCOMO_DAC); 968 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 969 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 970 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 971 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); 972 return; 973 } 974 975 /* Send Sub address (LSB is channel select) */ 976 /* channel = 0 : ch1 select */ 977 /* = 1 : ch2 select */ 978 data = M62332_SUB_ADDR + channel; 979 for (i = 1; i <= 8; i++) { 980 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 981 } 982 983 /* Check A bit */ 984 r = locomo_readl(mapbase + LOCOMO_DAC); 985 r &= ~(LOCOMO_DAC_SCLOEB); 986 locomo_writel(r, mapbase + LOCOMO_DAC); 987 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 988 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 989 r = locomo_readl(mapbase + LOCOMO_DAC); 990 r &= ~(LOCOMO_DAC_SDAOEB); 991 locomo_writel(r, mapbase + LOCOMO_DAC); 992 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 993 r = locomo_readl(mapbase + LOCOMO_DAC); 994 r |= LOCOMO_DAC_SCLOEB; 995 locomo_writel(r, mapbase + LOCOMO_DAC); 996 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 997 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 998 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 999 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); 1000 return; 1001 } 1002 1003 /* Send DAC data */ 1004 for (i = 1; i <= 8; i++) { 1005 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); 1006 } 1007 1008 /* Check A bit */ 1009 r = locomo_readl(mapbase + LOCOMO_DAC); 1010 r &= ~(LOCOMO_DAC_SCLOEB); 1011 locomo_writel(r, mapbase + LOCOMO_DAC); 1012 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1013 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1014 r = locomo_readl(mapbase + LOCOMO_DAC); 1015 r &= ~(LOCOMO_DAC_SDAOEB); 1016 locomo_writel(r, mapbase + LOCOMO_DAC); 1017 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1018 r = locomo_readl(mapbase + LOCOMO_DAC); 1019 r |= LOCOMO_DAC_SCLOEB; 1020 locomo_writel(r, mapbase + LOCOMO_DAC); 1021 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1022 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 1023 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 1024 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); 1025 return; 1026 } 1027 1028 /* stop */ 1029 r = locomo_readl(mapbase + LOCOMO_DAC); 1030 r &= ~(LOCOMO_DAC_SCLOEB); 1031 locomo_writel(r, mapbase + LOCOMO_DAC); 1032 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1033 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1034 r = locomo_readl(mapbase + LOCOMO_DAC); 1035 r |= LOCOMO_DAC_SCLOEB; 1036 locomo_writel(r, mapbase + LOCOMO_DAC); 1037 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1038 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1039 r = locomo_readl(mapbase + LOCOMO_DAC); 1040 r |= LOCOMO_DAC_SDAOEB; 1041 locomo_writel(r, mapbase + LOCOMO_DAC); 1042 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1043 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1044 1045 r = locomo_readl(mapbase + LOCOMO_DAC); 1046 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 1047 locomo_writel(r, mapbase + LOCOMO_DAC); 1048 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ 1049 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1050 1051 spin_unlock_irqrestore(&lchip->lock, flags); 1052 } 1053 1054 /* 1055 * LoCoMo "Register Access Bus." 1056 * 1057 * We model this as a regular bus type, and hang devices directly 1058 * off this. 1059 */ 1060 static int locomo_match(struct device *_dev, struct device_driver *_drv) 1061 { 1062 struct locomo_dev *dev = LOCOMO_DEV(_dev); 1063 struct locomo_driver *drv = LOCOMO_DRV(_drv); 1064 1065 return dev->devid == drv->devid; 1066 } 1067 1068 static int locomo_bus_suspend(struct device *dev, pm_message_t state) 1069 { 1070 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1071 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1072 int ret = 0; 1073 1074 if (drv && drv->suspend) 1075 ret = drv->suspend(ldev, state); 1076 return ret; 1077 } 1078 1079 static int locomo_bus_resume(struct device *dev) 1080 { 1081 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1082 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1083 int ret = 0; 1084 1085 if (drv && drv->resume) 1086 ret = drv->resume(ldev); 1087 return ret; 1088 } 1089 1090 static int locomo_bus_probe(struct device *dev) 1091 { 1092 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1093 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1094 int ret = -ENODEV; 1095 1096 if (drv->probe) 1097 ret = drv->probe(ldev); 1098 return ret; 1099 } 1100 1101 static int locomo_bus_remove(struct device *dev) 1102 { 1103 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1104 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1105 int ret = 0; 1106 1107 if (drv->remove) 1108 ret = drv->remove(ldev); 1109 return ret; 1110 } 1111 1112 struct bus_type locomo_bus_type = { 1113 .name = "locomo-bus", 1114 .match = locomo_match, 1115 .suspend = locomo_bus_suspend, 1116 .resume = locomo_bus_resume, 1117 }; 1118 1119 int locomo_driver_register(struct locomo_driver *driver) 1120 { 1121 driver->drv.probe = locomo_bus_probe; 1122 driver->drv.remove = locomo_bus_remove; 1123 driver->drv.bus = &locomo_bus_type; 1124 return driver_register(&driver->drv); 1125 } 1126 1127 void locomo_driver_unregister(struct locomo_driver *driver) 1128 { 1129 driver_unregister(&driver->drv); 1130 } 1131 1132 static int __init locomo_init(void) 1133 { 1134 int ret = bus_register(&locomo_bus_type); 1135 if (ret == 0) 1136 driver_register(&locomo_device_driver); 1137 return ret; 1138 } 1139 1140 static void __exit locomo_exit(void) 1141 { 1142 driver_unregister(&locomo_device_driver); 1143 bus_unregister(&locomo_bus_type); 1144 } 1145 1146 module_init(locomo_init); 1147 module_exit(locomo_exit); 1148 1149 MODULE_DESCRIPTION("Sharp LoCoMo core driver"); 1150 MODULE_LICENSE("GPL"); 1151 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); 1152 1153 EXPORT_SYMBOL(locomo_driver_register); 1154 EXPORT_SYMBOL(locomo_driver_unregister); 1155 EXPORT_SYMBOL(locomo_gpio_set_dir); 1156 EXPORT_SYMBOL(locomo_gpio_read_level); 1157 EXPORT_SYMBOL(locomo_gpio_read_output); 1158 EXPORT_SYMBOL(locomo_gpio_write); 1159 EXPORT_SYMBOL(locomo_m62332_senddata); 1160