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/module.h> 19 #include <linux/init.h> 20 #include <linux/kernel.h> 21 #include <linux/delay.h> 22 #include <linux/errno.h> 23 #include <linux/ioport.h> 24 #include <linux/platform_device.h> 25 #include <linux/slab.h> 26 #include <linux/spinlock.h> 27 28 #include <asm/hardware.h> 29 #include <asm/io.h> 30 #include <asm/irq.h> 31 #include <asm/mach/irq.h> 32 33 #include <asm/hardware/locomo.h> 34 35 /* M62332 output channel selection */ 36 #define M62332_EVR_CH 1 /* M62332 volume channel number */ 37 /* 0 : CH.1 , 1 : CH. 2 */ 38 /* DAC send data */ 39 #define M62332_SLAVE_ADDR 0x4e /* Slave address */ 40 #define M62332_W_BIT 0x00 /* W bit (0 only) */ 41 #define M62332_SUB_ADDR 0x00 /* Sub address */ 42 #define M62332_A_BIT 0x00 /* A bit (0 only) */ 43 44 /* DAC setup and hold times (expressed in us) */ 45 #define DAC_BUS_FREE_TIME 5 /* 4.7 us */ 46 #define DAC_START_SETUP_TIME 5 /* 4.7 us */ 47 #define DAC_STOP_SETUP_TIME 4 /* 4.0 us */ 48 #define DAC_START_HOLD_TIME 5 /* 4.7 us */ 49 #define DAC_SCL_LOW_HOLD_TIME 5 /* 4.7 us */ 50 #define DAC_SCL_HIGH_HOLD_TIME 4 /* 4.0 us */ 51 #define DAC_DATA_SETUP_TIME 1 /* 250 ns */ 52 #define DAC_DATA_HOLD_TIME 1 /* 300 ns */ 53 #define DAC_LOW_SETUP_TIME 1 /* 300 ns */ 54 #define DAC_HIGH_SETUP_TIME 1 /* 1000 ns */ 55 56 /* the following is the overall data for the locomo chip */ 57 struct locomo { 58 struct device *dev; 59 unsigned long phys; 60 unsigned int irq; 61 spinlock_t lock; 62 void __iomem *base; 63 #ifdef CONFIG_PM 64 void *saved_state; 65 #endif 66 }; 67 68 struct locomo_dev_info { 69 unsigned long offset; 70 unsigned long length; 71 unsigned int devid; 72 unsigned int irq[1]; 73 const char * name; 74 }; 75 76 /* All the locomo devices. If offset is non-zero, the mapbase for the 77 * locomo_dev will be set to the chip base plus offset. If offset is 78 * zero, then the mapbase for the locomo_dev will be set to zero. An 79 * offset of zero means the device only uses GPIOs or other helper 80 * functions inside this file */ 81 static struct locomo_dev_info locomo_devices[] = { 82 { 83 .devid = LOCOMO_DEVID_KEYBOARD, 84 .irq = { 85 IRQ_LOCOMO_KEY, 86 }, 87 .name = "locomo-keyboard", 88 .offset = LOCOMO_KEYBOARD, 89 .length = 16, 90 }, 91 { 92 .devid = LOCOMO_DEVID_FRONTLIGHT, 93 .irq = {}, 94 .name = "locomo-frontlight", 95 .offset = LOCOMO_FRONTLIGHT, 96 .length = 8, 97 98 }, 99 { 100 .devid = LOCOMO_DEVID_BACKLIGHT, 101 .irq = {}, 102 .name = "locomo-backlight", 103 .offset = LOCOMO_BACKLIGHT, 104 .length = 8, 105 }, 106 { 107 .devid = LOCOMO_DEVID_AUDIO, 108 .irq = {}, 109 .name = "locomo-audio", 110 .offset = LOCOMO_AUDIO, 111 .length = 4, 112 }, 113 { 114 .devid = LOCOMO_DEVID_LED, 115 .irq = {}, 116 .name = "locomo-led", 117 .offset = LOCOMO_LED, 118 .length = 8, 119 }, 120 { 121 .devid = LOCOMO_DEVID_UART, 122 .irq = {}, 123 .name = "locomo-uart", 124 .offset = 0, 125 .length = 0, 126 }, 127 { 128 .devid = LOCOMO_DEVID_SPI, 129 .irq = {}, 130 .name = "locomo-spi", 131 .offset = LOCOMO_SPI, 132 .length = 0x30, 133 }, 134 }; 135 136 137 /** LoCoMo interrupt handling stuff. 138 * NOTE: LoCoMo has a 1 to many mapping on all of its IRQs. 139 * that is, there is only one real hardware interrupt 140 * we determine which interrupt it is by reading some IO memory. 141 * We have two levels of expansion, first in the handler for the 142 * hardware interrupt we generate an interrupt 143 * IRQ_LOCOMO_*_BASE and those handlers generate more interrupts 144 * 145 * hardware irq reads LOCOMO_ICR & 0x0f00 146 * IRQ_LOCOMO_KEY_BASE 147 * IRQ_LOCOMO_GPIO_BASE 148 * IRQ_LOCOMO_LT_BASE 149 * IRQ_LOCOMO_SPI_BASE 150 * IRQ_LOCOMO_KEY_BASE reads LOCOMO_KIC & 0x0001 151 * IRQ_LOCOMO_KEY 152 * IRQ_LOCOMO_GPIO_BASE reads LOCOMO_GIR & LOCOMO_GPD & 0xffff 153 * IRQ_LOCOMO_GPIO[0-15] 154 * IRQ_LOCOMO_LT_BASE reads LOCOMO_LTINT & 0x0001 155 * IRQ_LOCOMO_LT 156 * IRQ_LOCOMO_SPI_BASE reads LOCOMO_SPIIR & 0x000F 157 * IRQ_LOCOMO_SPI_RFR 158 * IRQ_LOCOMO_SPI_RFW 159 * IRQ_LOCOMO_SPI_OVRN 160 * IRQ_LOCOMO_SPI_TEND 161 */ 162 163 #define LOCOMO_IRQ_START (IRQ_LOCOMO_KEY_BASE) 164 #define LOCOMO_IRQ_KEY_START (IRQ_LOCOMO_KEY) 165 #define LOCOMO_IRQ_GPIO_START (IRQ_LOCOMO_GPIO0) 166 #define LOCOMO_IRQ_LT_START (IRQ_LOCOMO_LT) 167 #define LOCOMO_IRQ_SPI_START (IRQ_LOCOMO_SPI_RFR) 168 169 static void locomo_handler(unsigned int irq, struct irq_desc *desc) 170 { 171 int req, i; 172 struct irq_desc *d; 173 void __iomem *mapbase = get_irq_chip_data(irq); 174 175 /* Acknowledge the parent IRQ */ 176 desc->chip->ack(irq); 177 178 /* check why this interrupt was generated */ 179 req = locomo_readl(mapbase + LOCOMO_ICR) & 0x0f00; 180 181 if (req) { 182 /* generate the next interrupt(s) */ 183 irq = LOCOMO_IRQ_START; 184 d = irq_desc + irq; 185 for (i = 0; i <= 3; i++, d++, irq++) { 186 if (req & (0x0100 << i)) { 187 desc_handle_irq(irq, d); 188 } 189 190 } 191 } 192 } 193 194 static void locomo_ack_irq(unsigned int irq) 195 { 196 } 197 198 static void locomo_mask_irq(unsigned int irq) 199 { 200 void __iomem *mapbase = get_irq_chip_data(irq); 201 unsigned int r; 202 r = locomo_readl(mapbase + LOCOMO_ICR); 203 r &= ~(0x0010 << (irq - LOCOMO_IRQ_START)); 204 locomo_writel(r, mapbase + LOCOMO_ICR); 205 } 206 207 static void locomo_unmask_irq(unsigned int irq) 208 { 209 void __iomem *mapbase = get_irq_chip_data(irq); 210 unsigned int r; 211 r = locomo_readl(mapbase + LOCOMO_ICR); 212 r |= (0x0010 << (irq - LOCOMO_IRQ_START)); 213 locomo_writel(r, mapbase + LOCOMO_ICR); 214 } 215 216 static struct irq_chip locomo_chip = { 217 .name = "LOCOMO", 218 .ack = locomo_ack_irq, 219 .mask = locomo_mask_irq, 220 .unmask = locomo_unmask_irq, 221 }; 222 223 static void locomo_key_handler(unsigned int irq, struct irq_desc *desc) 224 { 225 struct irq_desc *d; 226 void __iomem *mapbase = get_irq_chip_data(irq); 227 228 if (locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC) & 0x0001) { 229 d = irq_desc + LOCOMO_IRQ_KEY_START; 230 desc_handle_irq(LOCOMO_IRQ_KEY_START, d); 231 } 232 } 233 234 static void locomo_key_ack_irq(unsigned int irq) 235 { 236 void __iomem *mapbase = get_irq_chip_data(irq); 237 unsigned int r; 238 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 239 r &= ~(0x0100 << (irq - LOCOMO_IRQ_KEY_START)); 240 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 241 } 242 243 static void locomo_key_mask_irq(unsigned int irq) 244 { 245 void __iomem *mapbase = get_irq_chip_data(irq); 246 unsigned int r; 247 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 248 r &= ~(0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 249 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 250 } 251 252 static void locomo_key_unmask_irq(unsigned int irq) 253 { 254 void __iomem *mapbase = get_irq_chip_data(irq); 255 unsigned int r; 256 r = locomo_readl(mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 257 r |= (0x0010 << (irq - LOCOMO_IRQ_KEY_START)); 258 locomo_writel(r, mapbase + LOCOMO_KEYBOARD + LOCOMO_KIC); 259 } 260 261 static struct irq_chip locomo_key_chip = { 262 .name = "LOCOMO-key", 263 .ack = locomo_key_ack_irq, 264 .mask = locomo_key_mask_irq, 265 .unmask = locomo_key_unmask_irq, 266 }; 267 268 static void locomo_gpio_handler(unsigned int irq, struct irq_desc *desc) 269 { 270 int req, i; 271 struct irq_desc *d; 272 void __iomem *mapbase = get_irq_chip_data(irq); 273 274 req = locomo_readl(mapbase + LOCOMO_GIR) & 275 locomo_readl(mapbase + LOCOMO_GPD) & 276 0xffff; 277 278 if (req) { 279 irq = LOCOMO_IRQ_GPIO_START; 280 d = irq_desc + LOCOMO_IRQ_GPIO_START; 281 for (i = 0; i <= 15; i++, irq++, d++) { 282 if (req & (0x0001 << i)) { 283 desc_handle_irq(irq, d); 284 } 285 } 286 } 287 } 288 289 static void locomo_gpio_ack_irq(unsigned int irq) 290 { 291 void __iomem *mapbase = get_irq_chip_data(irq); 292 unsigned int r; 293 r = locomo_readl(mapbase + LOCOMO_GWE); 294 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 295 locomo_writel(r, mapbase + LOCOMO_GWE); 296 297 r = locomo_readl(mapbase + LOCOMO_GIS); 298 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 299 locomo_writel(r, mapbase + LOCOMO_GIS); 300 301 r = locomo_readl(mapbase + LOCOMO_GWE); 302 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 303 locomo_writel(r, mapbase + LOCOMO_GWE); 304 } 305 306 static void locomo_gpio_mask_irq(unsigned int irq) 307 { 308 void __iomem *mapbase = get_irq_chip_data(irq); 309 unsigned int r; 310 r = locomo_readl(mapbase + LOCOMO_GIE); 311 r &= ~(0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 312 locomo_writel(r, mapbase + LOCOMO_GIE); 313 } 314 315 static void locomo_gpio_unmask_irq(unsigned int irq) 316 { 317 void __iomem *mapbase = get_irq_chip_data(irq); 318 unsigned int r; 319 r = locomo_readl(mapbase + LOCOMO_GIE); 320 r |= (0x0001 << (irq - LOCOMO_IRQ_GPIO_START)); 321 locomo_writel(r, mapbase + LOCOMO_GIE); 322 } 323 324 static struct irq_chip locomo_gpio_chip = { 325 .name = "LOCOMO-gpio", 326 .ack = locomo_gpio_ack_irq, 327 .mask = locomo_gpio_mask_irq, 328 .unmask = locomo_gpio_unmask_irq, 329 }; 330 331 static void locomo_lt_handler(unsigned int irq, struct irq_desc *desc) 332 { 333 struct irq_desc *d; 334 void __iomem *mapbase = get_irq_chip_data(irq); 335 336 if (locomo_readl(mapbase + LOCOMO_LTINT) & 0x0001) { 337 d = irq_desc + LOCOMO_IRQ_LT_START; 338 desc_handle_irq(LOCOMO_IRQ_LT_START, d); 339 } 340 } 341 342 static void locomo_lt_ack_irq(unsigned int irq) 343 { 344 void __iomem *mapbase = get_irq_chip_data(irq); 345 unsigned int r; 346 r = locomo_readl(mapbase + LOCOMO_LTINT); 347 r &= ~(0x0100 << (irq - LOCOMO_IRQ_LT_START)); 348 locomo_writel(r, mapbase + LOCOMO_LTINT); 349 } 350 351 static void locomo_lt_mask_irq(unsigned int irq) 352 { 353 void __iomem *mapbase = get_irq_chip_data(irq); 354 unsigned int r; 355 r = locomo_readl(mapbase + LOCOMO_LTINT); 356 r &= ~(0x0010 << (irq - LOCOMO_IRQ_LT_START)); 357 locomo_writel(r, mapbase + LOCOMO_LTINT); 358 } 359 360 static void locomo_lt_unmask_irq(unsigned int irq) 361 { 362 void __iomem *mapbase = get_irq_chip_data(irq); 363 unsigned int r; 364 r = locomo_readl(mapbase + LOCOMO_LTINT); 365 r |= (0x0010 << (irq - LOCOMO_IRQ_LT_START)); 366 locomo_writel(r, mapbase + LOCOMO_LTINT); 367 } 368 369 static struct irq_chip locomo_lt_chip = { 370 .name = "LOCOMO-lt", 371 .ack = locomo_lt_ack_irq, 372 .mask = locomo_lt_mask_irq, 373 .unmask = locomo_lt_unmask_irq, 374 }; 375 376 static void locomo_spi_handler(unsigned int irq, struct irq_desc *desc) 377 { 378 int req, i; 379 struct irq_desc *d; 380 void __iomem *mapbase = get_irq_chip_data(irq); 381 382 req = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIR) & 0x000F; 383 if (req) { 384 irq = LOCOMO_IRQ_SPI_START; 385 d = irq_desc + irq; 386 387 for (i = 0; i <= 3; i++, irq++, d++) { 388 if (req & (0x0001 << i)) { 389 desc_handle_irq(irq, d); 390 } 391 } 392 } 393 } 394 395 static void locomo_spi_ack_irq(unsigned int irq) 396 { 397 void __iomem *mapbase = get_irq_chip_data(irq); 398 unsigned int r; 399 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE); 400 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 401 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE); 402 403 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIS); 404 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 405 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIS); 406 407 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIWE); 408 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 409 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIWE); 410 } 411 412 static void locomo_spi_mask_irq(unsigned int irq) 413 { 414 void __iomem *mapbase = get_irq_chip_data(irq); 415 unsigned int r; 416 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE); 417 r &= ~(0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 418 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE); 419 } 420 421 static void locomo_spi_unmask_irq(unsigned int irq) 422 { 423 void __iomem *mapbase = get_irq_chip_data(irq); 424 unsigned int r; 425 r = locomo_readl(mapbase + LOCOMO_SPI + LOCOMO_SPIIE); 426 r |= (0x0001 << (irq - LOCOMO_IRQ_SPI_START)); 427 locomo_writel(r, mapbase + LOCOMO_SPI + LOCOMO_SPIIE); 428 } 429 430 static struct irq_chip locomo_spi_chip = { 431 .name = "LOCOMO-spi", 432 .ack = locomo_spi_ack_irq, 433 .mask = locomo_spi_mask_irq, 434 .unmask = locomo_spi_unmask_irq, 435 }; 436 437 static void locomo_setup_irq(struct locomo *lchip) 438 { 439 int irq; 440 void __iomem *irqbase = lchip->base; 441 442 /* 443 * Install handler for IRQ_LOCOMO_HW. 444 */ 445 set_irq_type(lchip->irq, IRQT_FALLING); 446 set_irq_chip_data(lchip->irq, irqbase); 447 set_irq_chained_handler(lchip->irq, locomo_handler); 448 449 /* Install handlers for IRQ_LOCOMO_*_BASE */ 450 set_irq_chip(IRQ_LOCOMO_KEY_BASE, &locomo_chip); 451 set_irq_chip_data(IRQ_LOCOMO_KEY_BASE, irqbase); 452 set_irq_chained_handler(IRQ_LOCOMO_KEY_BASE, locomo_key_handler); 453 set_irq_flags(IRQ_LOCOMO_KEY_BASE, IRQF_VALID | IRQF_PROBE); 454 455 set_irq_chip(IRQ_LOCOMO_GPIO_BASE, &locomo_chip); 456 set_irq_chip_data(IRQ_LOCOMO_GPIO_BASE, irqbase); 457 set_irq_chained_handler(IRQ_LOCOMO_GPIO_BASE, locomo_gpio_handler); 458 set_irq_flags(IRQ_LOCOMO_GPIO_BASE, IRQF_VALID | IRQF_PROBE); 459 460 set_irq_chip(IRQ_LOCOMO_LT_BASE, &locomo_chip); 461 set_irq_chip_data(IRQ_LOCOMO_LT_BASE, irqbase); 462 set_irq_chained_handler(IRQ_LOCOMO_LT_BASE, locomo_lt_handler); 463 set_irq_flags(IRQ_LOCOMO_LT_BASE, IRQF_VALID | IRQF_PROBE); 464 465 set_irq_chip(IRQ_LOCOMO_SPI_BASE, &locomo_chip); 466 set_irq_chip_data(IRQ_LOCOMO_SPI_BASE, irqbase); 467 set_irq_chained_handler(IRQ_LOCOMO_SPI_BASE, locomo_spi_handler); 468 set_irq_flags(IRQ_LOCOMO_SPI_BASE, IRQF_VALID | IRQF_PROBE); 469 470 /* install handlers for IRQ_LOCOMO_KEY_BASE generated interrupts */ 471 set_irq_chip(LOCOMO_IRQ_KEY_START, &locomo_key_chip); 472 set_irq_chip_data(LOCOMO_IRQ_KEY_START, irqbase); 473 set_irq_handler(LOCOMO_IRQ_KEY_START, handle_edge_irq); 474 set_irq_flags(LOCOMO_IRQ_KEY_START, IRQF_VALID | IRQF_PROBE); 475 476 /* install handlers for IRQ_LOCOMO_GPIO_BASE generated interrupts */ 477 for (irq = LOCOMO_IRQ_GPIO_START; irq < LOCOMO_IRQ_GPIO_START + 16; irq++) { 478 set_irq_chip(irq, &locomo_gpio_chip); 479 set_irq_chip_data(irq, irqbase); 480 set_irq_handler(irq, handle_edge_irq); 481 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 482 } 483 484 /* install handlers for IRQ_LOCOMO_LT_BASE generated interrupts */ 485 set_irq_chip(LOCOMO_IRQ_LT_START, &locomo_lt_chip); 486 set_irq_chip_data(LOCOMO_IRQ_LT_START, irqbase); 487 set_irq_handler(LOCOMO_IRQ_LT_START, handle_edge_irq); 488 set_irq_flags(LOCOMO_IRQ_LT_START, IRQF_VALID | IRQF_PROBE); 489 490 /* install handlers for IRQ_LOCOMO_SPI_BASE generated interrupts */ 491 for (irq = LOCOMO_IRQ_SPI_START; irq < LOCOMO_IRQ_SPI_START + 3; irq++) { 492 set_irq_chip(irq, &locomo_spi_chip); 493 set_irq_chip_data(irq, irqbase); 494 set_irq_handler(irq, handle_edge_irq); 495 set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 496 } 497 } 498 499 500 static void locomo_dev_release(struct device *_dev) 501 { 502 struct locomo_dev *dev = LOCOMO_DEV(_dev); 503 504 kfree(dev); 505 } 506 507 static int 508 locomo_init_one_child(struct locomo *lchip, struct locomo_dev_info *info) 509 { 510 struct locomo_dev *dev; 511 int ret; 512 513 dev = kzalloc(sizeof(struct locomo_dev), GFP_KERNEL); 514 if (!dev) { 515 ret = -ENOMEM; 516 goto out; 517 } 518 519 strncpy(dev->dev.bus_id, info->name, sizeof(dev->dev.bus_id)); 520 /* 521 * If the parent device has a DMA mask associated with it, 522 * propagate it down to the children. 523 */ 524 if (lchip->dev->dma_mask) { 525 dev->dma_mask = *lchip->dev->dma_mask; 526 dev->dev.dma_mask = &dev->dma_mask; 527 } 528 529 dev->devid = info->devid; 530 dev->dev.parent = lchip->dev; 531 dev->dev.bus = &locomo_bus_type; 532 dev->dev.release = locomo_dev_release; 533 dev->dev.coherent_dma_mask = lchip->dev->coherent_dma_mask; 534 535 if (info->offset) 536 dev->mapbase = lchip->base + info->offset; 537 else 538 dev->mapbase = 0; 539 dev->length = info->length; 540 541 memmove(dev->irq, info->irq, sizeof(dev->irq)); 542 543 ret = device_register(&dev->dev); 544 if (ret) { 545 out: 546 kfree(dev); 547 } 548 return ret; 549 } 550 551 #ifdef CONFIG_PM 552 553 struct locomo_save_data { 554 u16 LCM_GPO; 555 u16 LCM_SPICT; 556 u16 LCM_GPE; 557 u16 LCM_ASD; 558 u16 LCM_SPIMD; 559 }; 560 561 static int locomo_suspend(struct platform_device *dev, pm_message_t state) 562 { 563 struct locomo *lchip = platform_get_drvdata(dev); 564 struct locomo_save_data *save; 565 unsigned long flags; 566 567 save = kmalloc(sizeof(struct locomo_save_data), GFP_KERNEL); 568 if (!save) 569 return -ENOMEM; 570 571 lchip->saved_state = save; 572 573 spin_lock_irqsave(&lchip->lock, flags); 574 575 save->LCM_GPO = locomo_readl(lchip->base + LOCOMO_GPO); /* GPIO */ 576 locomo_writel(0x00, lchip->base + LOCOMO_GPO); 577 save->LCM_SPICT = locomo_readl(lchip->base + LOCOMO_SPICT); /* SPI */ 578 locomo_writel(0x40, lchip->base + LOCOMO_SPICT); 579 save->LCM_GPE = locomo_readl(lchip->base + LOCOMO_GPE); /* GPIO */ 580 locomo_writel(0x00, lchip->base + LOCOMO_GPE); 581 save->LCM_ASD = locomo_readl(lchip->base + LOCOMO_ASD); /* ADSTART */ 582 locomo_writel(0x00, lchip->base + LOCOMO_ASD); 583 save->LCM_SPIMD = locomo_readl(lchip->base + LOCOMO_SPIMD); /* SPI */ 584 locomo_writel(0x3C14, lchip->base + LOCOMO_SPIMD); 585 586 locomo_writel(0x00, lchip->base + LOCOMO_PAIF); 587 locomo_writel(0x00, lchip->base + LOCOMO_DAC); 588 locomo_writel(0x00, lchip->base + LOCOMO_BACKLIGHT + LOCOMO_TC); 589 590 if ( (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT0) & 0x88) && (locomo_readl(lchip->base + LOCOMO_LED + LOCOMO_LPT1) & 0x88) ) 591 locomo_writel(0x00, lchip->base + LOCOMO_C32K); /* CLK32 off */ 592 else 593 /* 18MHz already enabled, so no wait */ 594 locomo_writel(0xc1, lchip->base + LOCOMO_C32K); /* CLK32 on */ 595 596 locomo_writel(0x00, lchip->base + LOCOMO_TADC); /* 18MHz clock off*/ 597 locomo_writel(0x00, lchip->base + LOCOMO_AUDIO + LOCOMO_ACC); /* 22MHz/24MHz clock off */ 598 locomo_writel(0x00, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); /* FL */ 599 600 spin_unlock_irqrestore(&lchip->lock, flags); 601 602 return 0; 603 } 604 605 static int locomo_resume(struct platform_device *dev) 606 { 607 struct locomo *lchip = platform_get_drvdata(dev); 608 struct locomo_save_data *save; 609 unsigned long r; 610 unsigned long flags; 611 612 save = lchip->saved_state; 613 if (!save) 614 return 0; 615 616 spin_lock_irqsave(&lchip->lock, flags); 617 618 locomo_writel(save->LCM_GPO, lchip->base + LOCOMO_GPO); 619 locomo_writel(save->LCM_SPICT, lchip->base + LOCOMO_SPICT); 620 locomo_writel(save->LCM_GPE, lchip->base + LOCOMO_GPE); 621 locomo_writel(save->LCM_ASD, lchip->base + LOCOMO_ASD); 622 locomo_writel(save->LCM_SPIMD, lchip->base + LOCOMO_SPIMD); 623 624 locomo_writel(0x00, lchip->base + LOCOMO_C32K); 625 locomo_writel(0x90, lchip->base + LOCOMO_TADC); 626 627 locomo_writel(0, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KSC); 628 r = locomo_readl(lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 629 r &= 0xFEFF; 630 locomo_writel(r, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KIC); 631 locomo_writel(0x1, lchip->base + LOCOMO_KEYBOARD + LOCOMO_KCMD); 632 633 spin_unlock_irqrestore(&lchip->lock, flags); 634 635 lchip->saved_state = NULL; 636 kfree(save); 637 638 return 0; 639 } 640 #endif 641 642 643 /** 644 * locomo_probe - probe for a single LoCoMo chip. 645 * @phys_addr: physical address of device. 646 * 647 * Probe for a LoCoMo chip. This must be called 648 * before any other locomo-specific code. 649 * 650 * Returns: 651 * %-ENODEV device not found. 652 * %-EBUSY physical address already marked in-use. 653 * %0 successful. 654 */ 655 static int 656 __locomo_probe(struct device *me, struct resource *mem, int irq) 657 { 658 struct locomo *lchip; 659 unsigned long r; 660 int i, ret = -ENODEV; 661 662 lchip = kzalloc(sizeof(struct locomo), GFP_KERNEL); 663 if (!lchip) 664 return -ENOMEM; 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); 700 701 /* Longtime timer */ 702 locomo_writel(0, lchip->base + LOCOMO_LTINT); 703 /* SPI */ 704 locomo_writel(0, lchip->base + LOCOMO_SPIIE); 705 706 locomo_writel(6 + 8 + 320 + 30 - 10, lchip->base + LOCOMO_ASD); 707 r = locomo_readl(lchip->base + LOCOMO_ASD); 708 r |= 0x8000; 709 locomo_writel(r, lchip->base + LOCOMO_ASD); 710 711 locomo_writel(6 + 8 + 320 + 30 - 10 - 128 + 4, lchip->base + LOCOMO_HSD); 712 r = locomo_readl(lchip->base + LOCOMO_HSD); 713 r |= 0x8000; 714 locomo_writel(r, lchip->base + LOCOMO_HSD); 715 716 locomo_writel(128 / 8, lchip->base + LOCOMO_HSC); 717 718 /* XON */ 719 locomo_writel(0x80, lchip->base + LOCOMO_TADC); 720 udelay(1000); 721 /* CLK9MEN */ 722 r = locomo_readl(lchip->base + LOCOMO_TADC); 723 r |= 0x10; 724 locomo_writel(r, lchip->base + LOCOMO_TADC); 725 udelay(100); 726 727 /* init DAC */ 728 r = locomo_readl(lchip->base + LOCOMO_DAC); 729 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 730 locomo_writel(r, lchip->base + LOCOMO_DAC); 731 732 r = locomo_readl(lchip->base + LOCOMO_VER); 733 printk(KERN_INFO "LoCoMo Chip: %lu%lu\n", (r >> 8), (r & 0xff)); 734 735 /* 736 * The interrupt controller must be initialised before any 737 * other device to ensure that the interrupts are available. 738 */ 739 if (lchip->irq != NO_IRQ) 740 locomo_setup_irq(lchip); 741 742 for (i = 0; i < ARRAY_SIZE(locomo_devices); i++) 743 locomo_init_one_child(lchip, &locomo_devices[i]); 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 platform_device *dev) 771 { 772 struct resource *mem; 773 int irq; 774 775 mem = platform_get_resource(dev, IORESOURCE_MEM, 0); 776 if (!mem) 777 return -EINVAL; 778 irq = platform_get_irq(dev, 0); 779 if (irq < 0) 780 return -ENXIO; 781 782 return __locomo_probe(&dev->dev, mem, irq); 783 } 784 785 static int locomo_remove(struct platform_device *dev) 786 { 787 struct locomo *lchip = platform_get_drvdata(dev); 788 789 if (lchip) { 790 __locomo_remove(lchip); 791 platform_set_drvdata(dev, NULL); 792 } 793 794 return 0; 795 } 796 797 /* 798 * Not sure if this should be on the system bus or not yet. 799 * We really want some way to register a system device at 800 * the per-machine level, and then have this driver pick 801 * up the registered devices. 802 */ 803 static struct platform_driver locomo_device_driver = { 804 .probe = locomo_probe, 805 .remove = locomo_remove, 806 #ifdef CONFIG_PM 807 .suspend = locomo_suspend, 808 .resume = locomo_resume, 809 #endif 810 .driver = { 811 .name = "locomo", 812 }, 813 }; 814 815 /* 816 * Get the parent device driver (us) structure 817 * from a child function device 818 */ 819 static inline struct locomo *locomo_chip_driver(struct locomo_dev *ldev) 820 { 821 return (struct locomo *)dev_get_drvdata(ldev->dev.parent); 822 } 823 824 void locomo_gpio_set_dir(struct device *dev, unsigned int bits, unsigned int dir) 825 { 826 struct locomo *lchip = dev_get_drvdata(dev); 827 unsigned long flags; 828 unsigned int r; 829 830 if (!lchip) 831 return; 832 833 spin_lock_irqsave(&lchip->lock, flags); 834 835 r = locomo_readl(lchip->base + LOCOMO_GPD); 836 r &= ~bits; 837 locomo_writel(r, lchip->base + LOCOMO_GPD); 838 839 r = locomo_readl(lchip->base + LOCOMO_GPE); 840 if (dir) 841 r |= bits; 842 else 843 r &= ~bits; 844 locomo_writel(r, lchip->base + LOCOMO_GPE); 845 846 spin_unlock_irqrestore(&lchip->lock, flags); 847 } 848 849 int locomo_gpio_read_level(struct device *dev, unsigned int bits) 850 { 851 struct locomo *lchip = dev_get_drvdata(dev); 852 unsigned long flags; 853 unsigned int ret; 854 855 if (!lchip) 856 return -ENODEV; 857 858 spin_lock_irqsave(&lchip->lock, flags); 859 ret = locomo_readl(lchip->base + LOCOMO_GPL); 860 spin_unlock_irqrestore(&lchip->lock, flags); 861 862 ret &= bits; 863 return ret; 864 } 865 866 int locomo_gpio_read_output(struct device *dev, unsigned int bits) 867 { 868 struct locomo *lchip = dev_get_drvdata(dev); 869 unsigned long flags; 870 unsigned int ret; 871 872 if (!lchip) 873 return -ENODEV; 874 875 spin_lock_irqsave(&lchip->lock, flags); 876 ret = locomo_readl(lchip->base + LOCOMO_GPO); 877 spin_unlock_irqrestore(&lchip->lock, flags); 878 879 ret &= bits; 880 return ret; 881 } 882 883 void locomo_gpio_write(struct device *dev, unsigned int bits, unsigned int set) 884 { 885 struct locomo *lchip = dev_get_drvdata(dev); 886 unsigned long flags; 887 unsigned int r; 888 889 if (!lchip) 890 return; 891 892 spin_lock_irqsave(&lchip->lock, flags); 893 894 r = locomo_readl(lchip->base + LOCOMO_GPO); 895 if (set) 896 r |= bits; 897 else 898 r &= ~bits; 899 locomo_writel(r, lchip->base + LOCOMO_GPO); 900 901 spin_unlock_irqrestore(&lchip->lock, flags); 902 } 903 904 static void locomo_m62332_sendbit(void *mapbase, int bit) 905 { 906 unsigned int r; 907 908 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_DATA_HOLD_TIME); /* 300 nsec */ 913 r = locomo_readl(mapbase + LOCOMO_DAC); 914 r &= ~(LOCOMO_DAC_SCLOEB); 915 locomo_writel(r, mapbase + LOCOMO_DAC); 916 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 917 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 918 919 if (bit & 1) { 920 r = locomo_readl(mapbase + LOCOMO_DAC); 921 r |= LOCOMO_DAC_SDAOEB; 922 locomo_writel(r, mapbase + LOCOMO_DAC); 923 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 924 } else { 925 r = locomo_readl(mapbase + LOCOMO_DAC); 926 r &= ~(LOCOMO_DAC_SDAOEB); 927 locomo_writel(r, mapbase + LOCOMO_DAC); 928 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 929 } 930 931 udelay(DAC_DATA_SETUP_TIME); /* 250 nsec */ 932 r = locomo_readl(mapbase + LOCOMO_DAC); 933 r |= LOCOMO_DAC_SCLOEB; 934 locomo_writel(r, mapbase + LOCOMO_DAC); 935 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 936 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 937 } 938 939 void locomo_m62332_senddata(struct locomo_dev *ldev, unsigned int dac_data, int channel) 940 { 941 struct locomo *lchip = locomo_chip_driver(ldev); 942 int i; 943 unsigned char data; 944 unsigned int r; 945 void *mapbase = lchip->base; 946 unsigned long flags; 947 948 spin_lock_irqsave(&lchip->lock, flags); 949 950 /* Start */ 951 udelay(DAC_BUS_FREE_TIME); /* 5.0 usec */ 952 r = locomo_readl(mapbase + LOCOMO_DAC); 953 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 954 locomo_writel(r, mapbase + LOCOMO_DAC); 955 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 956 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.0 usec */ 957 r = locomo_readl(mapbase + LOCOMO_DAC); 958 r &= ~(LOCOMO_DAC_SDAOEB); 959 locomo_writel(r, mapbase + LOCOMO_DAC); 960 udelay(DAC_START_HOLD_TIME); /* 5.0 usec */ 961 udelay(DAC_DATA_HOLD_TIME); /* 300 nsec */ 962 963 /* Send slave address and W bit (LSB is W bit) */ 964 data = (M62332_SLAVE_ADDR << 1) | M62332_W_BIT; 965 for (i = 1; i <= 8; i++) { 966 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 967 } 968 969 /* Check A bit */ 970 r = locomo_readl(mapbase + LOCOMO_DAC); 971 r &= ~(LOCOMO_DAC_SCLOEB); 972 locomo_writel(r, mapbase + LOCOMO_DAC); 973 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 974 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 975 r = locomo_readl(mapbase + LOCOMO_DAC); 976 r &= ~(LOCOMO_DAC_SDAOEB); 977 locomo_writel(r, mapbase + LOCOMO_DAC); 978 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 979 r = locomo_readl(mapbase + LOCOMO_DAC); 980 r |= LOCOMO_DAC_SCLOEB; 981 locomo_writel(r, mapbase + LOCOMO_DAC); 982 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 983 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 984 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 985 printk(KERN_WARNING "locomo: m62332_senddata Error 1\n"); 986 return; 987 } 988 989 /* Send Sub address (LSB is channel select) */ 990 /* channel = 0 : ch1 select */ 991 /* = 1 : ch2 select */ 992 data = M62332_SUB_ADDR + channel; 993 for (i = 1; i <= 8; i++) { 994 locomo_m62332_sendbit(mapbase, data >> (8 - i)); 995 } 996 997 /* Check A bit */ 998 r = locomo_readl(mapbase + LOCOMO_DAC); 999 r &= ~(LOCOMO_DAC_SCLOEB); 1000 locomo_writel(r, mapbase + LOCOMO_DAC); 1001 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1002 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1003 r = locomo_readl(mapbase + LOCOMO_DAC); 1004 r &= ~(LOCOMO_DAC_SDAOEB); 1005 locomo_writel(r, mapbase + LOCOMO_DAC); 1006 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1007 r = locomo_readl(mapbase + LOCOMO_DAC); 1008 r |= LOCOMO_DAC_SCLOEB; 1009 locomo_writel(r, mapbase + LOCOMO_DAC); 1010 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1011 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 1012 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 1013 printk(KERN_WARNING "locomo: m62332_senddata Error 2\n"); 1014 return; 1015 } 1016 1017 /* Send DAC data */ 1018 for (i = 1; i <= 8; i++) { 1019 locomo_m62332_sendbit(mapbase, dac_data >> (8 - i)); 1020 } 1021 1022 /* Check A bit */ 1023 r = locomo_readl(mapbase + LOCOMO_DAC); 1024 r &= ~(LOCOMO_DAC_SCLOEB); 1025 locomo_writel(r, mapbase + LOCOMO_DAC); 1026 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1027 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1028 r = locomo_readl(mapbase + LOCOMO_DAC); 1029 r &= ~(LOCOMO_DAC_SDAOEB); 1030 locomo_writel(r, mapbase + LOCOMO_DAC); 1031 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1032 r = locomo_readl(mapbase + LOCOMO_DAC); 1033 r |= LOCOMO_DAC_SCLOEB; 1034 locomo_writel(r, mapbase + LOCOMO_DAC); 1035 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1036 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4.7 usec */ 1037 if (locomo_readl(mapbase + LOCOMO_DAC) & LOCOMO_DAC_SDAOEB) { /* High is error */ 1038 printk(KERN_WARNING "locomo: m62332_senddata Error 3\n"); 1039 return; 1040 } 1041 1042 /* stop */ 1043 r = locomo_readl(mapbase + LOCOMO_DAC); 1044 r &= ~(LOCOMO_DAC_SCLOEB); 1045 locomo_writel(r, mapbase + LOCOMO_DAC); 1046 udelay(DAC_LOW_SETUP_TIME); /* 300 nsec */ 1047 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1048 r = locomo_readl(mapbase + LOCOMO_DAC); 1049 r |= LOCOMO_DAC_SCLOEB; 1050 locomo_writel(r, mapbase + LOCOMO_DAC); 1051 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1052 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1053 r = locomo_readl(mapbase + LOCOMO_DAC); 1054 r |= LOCOMO_DAC_SDAOEB; 1055 locomo_writel(r, mapbase + LOCOMO_DAC); 1056 udelay(DAC_HIGH_SETUP_TIME); /* 1000 nsec */ 1057 udelay(DAC_SCL_HIGH_HOLD_TIME); /* 4 usec */ 1058 1059 r = locomo_readl(mapbase + LOCOMO_DAC); 1060 r |= LOCOMO_DAC_SCLOEB | LOCOMO_DAC_SDAOEB; 1061 locomo_writel(r, mapbase + LOCOMO_DAC); 1062 udelay(DAC_LOW_SETUP_TIME); /* 1000 nsec */ 1063 udelay(DAC_SCL_LOW_HOLD_TIME); /* 4.7 usec */ 1064 1065 spin_unlock_irqrestore(&lchip->lock, flags); 1066 } 1067 1068 /* 1069 * Frontlight control 1070 */ 1071 1072 static struct locomo *locomo_chip_driver(struct locomo_dev *ldev); 1073 1074 void locomo_frontlight_set(struct locomo_dev *dev, int duty, int vr, int bpwf) 1075 { 1076 unsigned long flags; 1077 struct locomo *lchip = locomo_chip_driver(dev); 1078 1079 if (vr) 1080 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 1); 1081 else 1082 locomo_gpio_write(dev->dev.parent, LOCOMO_GPIO_FL_VR, 0); 1083 1084 spin_lock_irqsave(&lchip->lock, flags); 1085 locomo_writel(bpwf, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); 1086 udelay(100); 1087 locomo_writel(duty, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALD); 1088 locomo_writel(bpwf | LOCOMO_ALC_EN, lchip->base + LOCOMO_FRONTLIGHT + LOCOMO_ALS); 1089 spin_unlock_irqrestore(&lchip->lock, flags); 1090 } 1091 1092 /* 1093 * LoCoMo "Register Access Bus." 1094 * 1095 * We model this as a regular bus type, and hang devices directly 1096 * off this. 1097 */ 1098 static int locomo_match(struct device *_dev, struct device_driver *_drv) 1099 { 1100 struct locomo_dev *dev = LOCOMO_DEV(_dev); 1101 struct locomo_driver *drv = LOCOMO_DRV(_drv); 1102 1103 return dev->devid == drv->devid; 1104 } 1105 1106 static int locomo_bus_suspend(struct device *dev, pm_message_t state) 1107 { 1108 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1109 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1110 int ret = 0; 1111 1112 if (drv && drv->suspend) 1113 ret = drv->suspend(ldev, state); 1114 return ret; 1115 } 1116 1117 static int locomo_bus_resume(struct device *dev) 1118 { 1119 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1120 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1121 int ret = 0; 1122 1123 if (drv && drv->resume) 1124 ret = drv->resume(ldev); 1125 return ret; 1126 } 1127 1128 static int locomo_bus_probe(struct device *dev) 1129 { 1130 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1131 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1132 int ret = -ENODEV; 1133 1134 if (drv->probe) 1135 ret = drv->probe(ldev); 1136 return ret; 1137 } 1138 1139 static int locomo_bus_remove(struct device *dev) 1140 { 1141 struct locomo_dev *ldev = LOCOMO_DEV(dev); 1142 struct locomo_driver *drv = LOCOMO_DRV(dev->driver); 1143 int ret = 0; 1144 1145 if (drv->remove) 1146 ret = drv->remove(ldev); 1147 return ret; 1148 } 1149 1150 struct bus_type locomo_bus_type = { 1151 .name = "locomo-bus", 1152 .match = locomo_match, 1153 .probe = locomo_bus_probe, 1154 .remove = locomo_bus_remove, 1155 .suspend = locomo_bus_suspend, 1156 .resume = locomo_bus_resume, 1157 }; 1158 1159 int locomo_driver_register(struct locomo_driver *driver) 1160 { 1161 driver->drv.bus = &locomo_bus_type; 1162 return driver_register(&driver->drv); 1163 } 1164 1165 void locomo_driver_unregister(struct locomo_driver *driver) 1166 { 1167 driver_unregister(&driver->drv); 1168 } 1169 1170 static int __init locomo_init(void) 1171 { 1172 int ret = bus_register(&locomo_bus_type); 1173 if (ret == 0) 1174 platform_driver_register(&locomo_device_driver); 1175 return ret; 1176 } 1177 1178 static void __exit locomo_exit(void) 1179 { 1180 platform_driver_unregister(&locomo_device_driver); 1181 bus_unregister(&locomo_bus_type); 1182 } 1183 1184 module_init(locomo_init); 1185 module_exit(locomo_exit); 1186 1187 MODULE_DESCRIPTION("Sharp LoCoMo core driver"); 1188 MODULE_LICENSE("GPL"); 1189 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); 1190 1191 EXPORT_SYMBOL(locomo_driver_register); 1192 EXPORT_SYMBOL(locomo_driver_unregister); 1193 EXPORT_SYMBOL(locomo_gpio_set_dir); 1194 EXPORT_SYMBOL(locomo_gpio_read_level); 1195 EXPORT_SYMBOL(locomo_gpio_read_output); 1196 EXPORT_SYMBOL(locomo_gpio_write); 1197 EXPORT_SYMBOL(locomo_m62332_senddata); 1198