Jack Lee | 9c6712c | 2007-02-07 18:19:09 +0100 | [diff] [blame^] | 1 | #include <linux/kernel.h> |
| 2 | #include <linux/types.h> |
| 3 | #include <linux/module.h> |
| 4 | #include <linux/pci.h> |
| 5 | #include <linux/delay.h> |
| 6 | #include <linux/hdreg.h> |
| 7 | #include <linux/ide.h> |
| 8 | #include <linux/init.h> |
| 9 | |
| 10 | #include <asm/io.h> |
| 11 | |
| 12 | /* |
| 13 | * it8213_ratemask - Compute available modes |
| 14 | * @drive: IDE drive |
| 15 | * |
| 16 | * Compute the available speeds for the devices on the interface. This |
| 17 | * is all modes to ATA100 clipped by drive cable setup. |
| 18 | */ |
| 19 | |
| 20 | static u8 it8213_ratemask (ide_drive_t *drive) |
| 21 | { |
| 22 | u8 mode = 4; |
| 23 | if (!eighty_ninty_three(drive)) |
| 24 | mode = min(mode, (u8)1); |
| 25 | return mode; |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * it8213_dma_2_pio - return the PIO mode matching DMA |
| 30 | * @xfer_rate: transfer speed |
| 31 | * |
| 32 | * Returns the nearest equivalent PIO timing for the PIO or DMA |
| 33 | * mode requested by the controller. |
| 34 | */ |
| 35 | |
| 36 | static u8 it8213_dma_2_pio (u8 xfer_rate) { |
| 37 | switch(xfer_rate) { |
| 38 | case XFER_UDMA_6: |
| 39 | case XFER_UDMA_5: |
| 40 | case XFER_UDMA_4: |
| 41 | case XFER_UDMA_3: |
| 42 | case XFER_UDMA_2: |
| 43 | case XFER_UDMA_1: |
| 44 | case XFER_UDMA_0: |
| 45 | case XFER_MW_DMA_2: |
| 46 | case XFER_PIO_4: |
| 47 | return 4; |
| 48 | case XFER_MW_DMA_1: |
| 49 | case XFER_PIO_3: |
| 50 | return 3; |
| 51 | case XFER_SW_DMA_2: |
| 52 | case XFER_PIO_2: |
| 53 | return 2; |
| 54 | case XFER_MW_DMA_0: |
| 55 | case XFER_SW_DMA_1: |
| 56 | case XFER_SW_DMA_0: |
| 57 | case XFER_PIO_1: |
| 58 | case XFER_PIO_0: |
| 59 | case XFER_PIO_SLOW: |
| 60 | default: |
| 61 | return 0; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | static spinlock_t tune_lock = SPIN_LOCK_UNLOCKED; |
| 66 | |
| 67 | /* |
| 68 | * it8213_tuneproc - tune a drive |
| 69 | * @drive: drive to tune |
| 70 | * @mode_wanted: the target operating mode |
| 71 | * |
| 72 | * Load the timing settings for this device mode into the |
| 73 | * controller. By the time we are called the mode has been |
| 74 | * modified as neccessary to handle the absence of seperate |
| 75 | * master/slave timers for MWDMA/PIO. |
| 76 | * |
| 77 | * This code is only used in pass through mode. |
| 78 | */ |
| 79 | |
| 80 | static void it8213_tuneproc (ide_drive_t *drive, u8 pio) |
| 81 | { |
| 82 | ide_hwif_t *hwif = HWIF(drive); |
| 83 | struct pci_dev *dev = hwif->pci_dev; |
| 84 | int is_slave = (&hwif->drives[1] == drive); |
| 85 | int master_port = 0x40; |
| 86 | int slave_port = 0x44; |
| 87 | unsigned long flags; |
| 88 | u16 master_data; |
| 89 | u8 slave_data; |
| 90 | |
| 91 | u8 timings[][2] = { { 0, 0 }, |
| 92 | { 0, 0 }, |
| 93 | { 1, 0 }, |
| 94 | { 2, 1 }, |
| 95 | { 2, 3 }, }; |
| 96 | |
| 97 | pio = ide_get_best_pio_mode(drive, pio, 5, NULL); |
| 98 | |
| 99 | spin_lock_irqsave(&tune_lock, flags); |
| 100 | pci_read_config_word(dev, master_port, &master_data); |
| 101 | if (is_slave) { |
| 102 | master_data = master_data | 0x4000; |
| 103 | if (pio > 1) |
| 104 | |
| 105 | master_data = master_data | 0x0070; |
| 106 | pci_read_config_byte(dev, slave_port, &slave_data); |
| 107 | slave_data = slave_data & 0xf0; |
| 108 | slave_data = slave_data | (((timings[pio][0] << 2) | (timings[pio][1]) << 0)); |
| 109 | } else { |
| 110 | master_data = master_data & 0xccf8; |
| 111 | if (pio > 1) |
| 112 | |
| 113 | master_data = master_data | 0x0007; |
| 114 | master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8); |
| 115 | } |
| 116 | pci_write_config_word(dev, master_port, master_data); |
| 117 | if (is_slave) |
| 118 | pci_write_config_byte(dev, slave_port, slave_data); |
| 119 | spin_unlock_irqrestore(&tune_lock, flags); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | /** |
| 124 | * it8213_tune_chipset - set controller timings |
| 125 | * @drive: Drive to set up |
| 126 | * @xferspeed: speed we want to achieve |
| 127 | * |
| 128 | * Tune the ITE chipset for the desired mode. If we can't achieve |
| 129 | * the desired mode then tune for a lower one, but ultimately |
| 130 | * make the thing work. |
| 131 | */ |
| 132 | |
| 133 | static int it8213_tune_chipset (ide_drive_t *drive, byte xferspeed) |
| 134 | { |
| 135 | |
| 136 | ide_hwif_t *hwif = HWIF(drive); |
| 137 | struct pci_dev *dev = hwif->pci_dev; |
| 138 | u8 maslave = 0x40; |
| 139 | u8 speed = ide_rate_filter(it8213_ratemask(drive), xferspeed); |
| 140 | int a_speed = 3 << (drive->dn * 4); |
| 141 | int u_flag = 1 << drive->dn; |
| 142 | int v_flag = 0x01 << drive->dn; |
| 143 | int w_flag = 0x10 << drive->dn; |
| 144 | int u_speed = 0; |
| 145 | u16 reg4042, reg4a; |
| 146 | u8 reg48, reg54, reg55; |
| 147 | |
| 148 | pci_read_config_word(dev, maslave, ®4042); |
| 149 | pci_read_config_byte(dev, 0x48, ®48); |
| 150 | pci_read_config_word(dev, 0x4a, ®4a); |
| 151 | pci_read_config_byte(dev, 0x54, ®54); |
| 152 | pci_read_config_byte(dev, 0x55, ®55); |
| 153 | |
| 154 | switch(speed) { |
| 155 | case XFER_UDMA_6: |
| 156 | case XFER_UDMA_4: |
| 157 | case XFER_UDMA_2:u_speed = 2 << (drive->dn * 4); break; |
| 158 | case XFER_UDMA_5: |
| 159 | case XFER_UDMA_3: |
| 160 | case XFER_UDMA_1:u_speed = 1 << (drive->dn * 4); break; |
| 161 | case XFER_UDMA_0:u_speed = 0 << (drive->dn * 4); break; |
| 162 | break; |
| 163 | case XFER_MW_DMA_2: |
| 164 | case XFER_MW_DMA_1: |
| 165 | case XFER_MW_DMA_0: |
| 166 | break; |
| 167 | case XFER_PIO_4: |
| 168 | case XFER_PIO_3: |
| 169 | case XFER_PIO_2: |
| 170 | case XFER_PIO_1: |
| 171 | case XFER_PIO_0: |
| 172 | break; |
| 173 | default: |
| 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | if (speed >= XFER_UDMA_0) |
| 178 | { |
| 179 | if (!(reg48 & u_flag)) |
| 180 | pci_write_config_byte(dev, 0x48, reg48 | u_flag); |
| 181 | if (speed >= XFER_UDMA_5) { |
| 182 | pci_write_config_byte(dev, 0x55, (u8) reg55|w_flag); |
| 183 | } else { |
| 184 | pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); |
| 185 | } |
| 186 | |
| 187 | if ((reg4a & a_speed) != u_speed) |
| 188 | pci_write_config_word(dev, 0x4a, (reg4a & ~a_speed) | u_speed); |
| 189 | if (speed > XFER_UDMA_2) |
| 190 | { |
| 191 | if (!(reg54 & v_flag)) |
| 192 | pci_write_config_byte(dev, 0x54, reg54 | v_flag); |
| 193 | } else |
| 194 | pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); |
| 195 | } else /*if(speed >= XFER_UDMA_0)*/ |
| 196 | { |
| 197 | if (reg48 & u_flag) |
| 198 | pci_write_config_byte(dev, 0x48, reg48 & ~u_flag); |
| 199 | if (reg4a & a_speed) |
| 200 | pci_write_config_word(dev, 0x4a, reg4a & ~a_speed); |
| 201 | if (reg54 & v_flag) |
| 202 | pci_write_config_byte(dev, 0x54, reg54 & ~v_flag); |
| 203 | if (reg55 & w_flag) |
| 204 | pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag); |
| 205 | } |
| 206 | it8213_tuneproc(drive, it8213_dma_2_pio(speed)); |
| 207 | return ide_config_drive_speed(drive, speed); |
| 208 | } |
| 209 | |
| 210 | |
| 211 | /* |
| 212 | * config_chipset_for_dma - configure for DMA |
| 213 | * @drive: drive to configure |
| 214 | * |
| 215 | * Called by the IDE layer when it wants the timings set up. |
| 216 | */ |
| 217 | |
| 218 | static int config_chipset_for_dma (ide_drive_t *drive) |
| 219 | { |
| 220 | u8 speed = ide_dma_speed(drive, it8213_ratemask(drive)); |
| 221 | if (!speed) |
| 222 | { |
| 223 | u8 tspeed = ide_get_best_pio_mode(drive, 255, 5, NULL); |
| 224 | speed = it8213_dma_2_pio(XFER_PIO_0 + tspeed); |
| 225 | } |
| 226 | // config_it8213_chipset_for_pio(drive, !speed); |
| 227 | it8213_tune_chipset(drive, speed); |
| 228 | return ide_dma_enable(drive); |
| 229 | } |
| 230 | |
| 231 | /** |
| 232 | * config_it8213_chipset_for_pio - set drive timings |
| 233 | * @drive: drive to tune |
| 234 | * @speed we want |
| 235 | * |
| 236 | * Compute the best pio mode we can for a given device. We must |
| 237 | * pick a speed that does not cause problems with the other device |
| 238 | * on the cable. |
| 239 | */ |
| 240 | /* |
| 241 | static void config_it8213_chipset_for_pio (ide_drive_t *drive, byte set_speed) |
| 242 | { |
| 243 | ide_hwif_t *hwif = HWIF(drive); |
| 244 | // u8 unit = drive->select.b.unit; |
| 245 | ide_hwif_t *hwif = drive->hwif; |
| 246 | ide_drive_t *pair = &hwif->drives[1-unit]; |
| 247 | u8 speed = 0, set_pio = ide_get_best_pio_mode(drive, 255, 5, NULL); |
| 248 | u8 pair_pio; |
| 249 | |
| 250 | if(pair != NULL) { |
| 251 | pair_pio = ide_get_best_pio_mode(pair, 255, 5, NULL); |
| 252 | if(pair_pio < set_pio) |
| 253 | set_pio = pair_pio; |
| 254 | } |
| 255 | it8213_tuneproc(drive, set_pio); |
| 256 | speed = XFER_PIO_0 + set_pio; |
| 257 | if (set_speed) |
| 258 | (void) ide_config_drive_speed(drive, speed); |
| 259 | } |
| 260 | */ |
| 261 | /** |
| 262 | * it8213_configure_drive_for_dma - set up for DMA transfers |
| 263 | * @drive: drive we are going to set up |
| 264 | * |
| 265 | * Set up the drive for DMA, tune the controller and drive as |
| 266 | * required. If the drive isn't suitable for DMA or we hit |
| 267 | * other problems then we will drop down to PIO and set up |
| 268 | * PIO appropriately |
| 269 | */ |
| 270 | |
| 271 | static int it8213_config_drive_for_dma (ide_drive_t *drive) |
| 272 | { |
| 273 | // ide_hwif_t *hwif = drive->hwif; |
| 274 | // struct hd_driveid *id = drive->id; |
| 275 | ide_hwif_t *hwif = HWIF(drive); |
| 276 | if (ide_use_dma(drive)) { |
| 277 | if (config_chipset_for_dma(drive)) |
| 278 | return hwif->ide_dma_on(drive); |
| 279 | } |
| 280 | // config_it8213_chipset_for_pio(drive, 1); |
| 281 | hwif->tuneproc(drive, 255); |
| 282 | return hwif->ide_dma_off_quietly(drive); |
| 283 | } |
| 284 | |
| 285 | |
| 286 | static unsigned int __devinit init_chipset_it8213(struct pci_dev *dev, const char *name) |
| 287 | { |
| 288 | printk(KERN_INFO "it8213: controller in IDE mode.\n"); |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | |
| 293 | /** |
| 294 | * init_hwif_it8213 - set up hwif structs |
| 295 | * @hwif: interface to set up |
| 296 | * |
| 297 | * We do the basic set up of the interface structure. The IT8212 |
| 298 | * requires several custom handlers so we override the default |
| 299 | * ide DMA handlers appropriately |
| 300 | */ |
| 301 | |
| 302 | static void __devinit init_hwif_it8213(ide_hwif_t *hwif) |
| 303 | { |
| 304 | u8 reg42h = 0, ata66 = 0; |
| 305 | u8 mask = 0x02; |
| 306 | |
| 307 | hwif->atapi_dma = 1; |
| 308 | |
| 309 | hwif->speedproc = &it8213_tune_chipset; |
| 310 | hwif->tuneproc = &it8213_tuneproc; |
| 311 | |
| 312 | hwif->autodma = 0; |
| 313 | |
| 314 | hwif->drives[0].autotune = 1; |
| 315 | hwif->drives[1].autotune = 1; |
| 316 | |
| 317 | if (!hwif->dma_base) |
| 318 | goto fallback; |
| 319 | hwif->atapi_dma = 1; |
| 320 | hwif->ultra_mask = 0x7f; |
| 321 | hwif->mwdma_mask = 0x07; |
| 322 | hwif->swdma_mask = 0x07; |
| 323 | |
| 324 | pci_read_config_byte(hwif->pci_dev, 0x42, ®42h); |
| 325 | ata66 = (reg42h & mask) ? 0 : 1; |
| 326 | |
| 327 | hwif->ide_dma_check = &it8213_config_drive_for_dma; |
| 328 | if (!(hwif->udma_four)) |
| 329 | hwif->udma_four = ata66; |
| 330 | // hwif->udma_four = 0; |
| 331 | |
| 332 | /* |
| 333 | * The BIOS often doesn't set up DMA on this controller |
| 334 | * so we always do it. |
| 335 | */ |
| 336 | if (!noautodma) |
| 337 | hwif->autodma = 1; |
| 338 | |
| 339 | hwif->drives[0].autodma = hwif->autodma; |
| 340 | hwif->drives[1].autodma = hwif->autodma; |
| 341 | return; |
| 342 | fallback: |
| 343 | hwif->autodma = 0; |
| 344 | return; |
| 345 | } |
| 346 | |
| 347 | |
| 348 | #define DECLARE_ITE_DEV(name_str) \ |
| 349 | { \ |
| 350 | .name = name_str, \ |
| 351 | .init_chipset = init_chipset_it8213, \ |
| 352 | .init_hwif = init_hwif_it8213, \ |
| 353 | .channels = 1, \ |
| 354 | .autodma = AUTODMA, \ |
| 355 | .enablebits = {{0x41,0x80,0x80}}, \ |
| 356 | .bootable = ON_BOARD, \ |
| 357 | } |
| 358 | |
| 359 | static ide_pci_device_t it8213_chipsets[] __devinitdata = { |
| 360 | /* 0 */ DECLARE_ITE_DEV("IT8213"), |
| 361 | }; |
| 362 | |
| 363 | |
| 364 | /** |
| 365 | * it8213_init_one - pci layer discovery entry |
| 366 | * @dev: PCI device |
| 367 | * @id: ident table entry |
| 368 | * |
| 369 | * Called by the PCI code when it finds an ITE8213 controller. As |
| 370 | * this device follows the standard interfaces we can use the |
| 371 | * standard helper functions to do almost all the work for us. |
| 372 | */ |
| 373 | |
| 374 | static int __devinit it8213_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 375 | { |
| 376 | ide_setup_pci_device(dev, &it8213_chipsets[id->driver_data]); |
| 377 | return 0; |
| 378 | } |
| 379 | |
| 380 | |
| 381 | static struct pci_device_id it8213_pci_tbl[] = { |
| 382 | { PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8213, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, |
| 383 | { 0, }, |
| 384 | }; |
| 385 | |
| 386 | MODULE_DEVICE_TABLE(pci, it8213_pci_tbl); |
| 387 | |
| 388 | static struct pci_driver driver = { |
| 389 | .name = "ITE8213_IDE", |
| 390 | .id_table = it8213_pci_tbl, |
| 391 | .probe = it8213_init_one, |
| 392 | }; |
| 393 | |
| 394 | static int __init it8213_ide_init(void) |
| 395 | { |
| 396 | return ide_pci_register_driver(&driver); } |
| 397 | |
| 398 | module_init(it8213_ide_init); |
| 399 | |
| 400 | MODULE_AUTHOR("Jack and Alan Cox"); /* Update this */ |
| 401 | MODULE_DESCRIPTION("PCI driver module for the ITE 8213"); |
| 402 | MODULE_LICENSE("GPL"); |