Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 1 | /* |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 2 | * Copyright (C) 2004 Red Hat <alan@redhat.com> |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 3 | * Copyright (C) 2007 Bartlomiej Zolnierkiewicz |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 4 | * |
| 5 | * May be copied or modified under the terms of the GNU General Public License |
| 6 | * Based in part on the ITE vendor provided SCSI driver. |
| 7 | * |
| 8 | * Documentation available from |
| 9 | * http://www.ite.com.tw/pc/IT8212F_V04.pdf |
| 10 | * Some other documents are NDA. |
| 11 | * |
| 12 | * The ITE8212 isn't exactly a standard IDE controller. It has two |
| 13 | * modes. In pass through mode then it is an IDE controller. In its smart |
| 14 | * mode its actually quite a capable hardware raid controller disguised |
| 15 | * as an IDE controller. Smart mode only understands DMA read/write and |
| 16 | * identify, none of the fancier commands apply. The IT8211 is identical |
| 17 | * in other respects but lacks the raid mode. |
| 18 | * |
| 19 | * Errata: |
| 20 | * o Rev 0x10 also requires master/slave hold the same DMA timings and |
| 21 | * cannot do ATAPI MWDMA. |
| 22 | * o The identify data for raid volumes lacks CHS info (technically ok) |
| 23 | * but also fails to set the LBA28 and other bits. We fix these in |
| 24 | * the IDE probe quirk code. |
| 25 | * o If you write LBA48 sized I/O's (ie > 256 sector) in smart mode |
| 26 | * raid then the controller firmware dies |
| 27 | * o Smart mode without RAID doesn't clear all the necessary identify |
| 28 | * bits to reduce the command set to the one used |
| 29 | * |
| 30 | * This has a few impacts on the driver |
| 31 | * - In pass through mode we do all the work you would expect |
| 32 | * - In smart mode the clocking set up is done by the controller generally |
| 33 | * but we must watch the other limits and filter. |
| 34 | * - There are a few extra vendor commands that actually talk to the |
| 35 | * controller but only work PIO with no IRQ. |
| 36 | * |
| 37 | * Vendor areas of the identify block in smart mode are used for the |
| 38 | * timing and policy set up. Each HDD in raid mode also has a serial |
| 39 | * block on the disk. The hardware extra commands are get/set chip status, |
| 40 | * rebuild, get rebuild status. |
| 41 | * |
| 42 | * In Linux the driver supports pass through mode as if the device was |
| 43 | * just another IDE controller. If the smart mode is running then |
| 44 | * volumes are managed by the controller firmware and each IDE "disk" |
| 45 | * is a raid volume. Even more cute - the controller can do automated |
| 46 | * hotplug and rebuild. |
| 47 | * |
| 48 | * The pass through controller itself is a little demented. It has a |
| 49 | * flaw that it has a single set of PIO/MWDMA timings per channel so |
| 50 | * non UDMA devices restrict each others performance. It also has a |
| 51 | * single clock source per channel so mixed UDMA100/133 performance |
| 52 | * isn't perfect and we have to pick a clock. Thankfully none of this |
| 53 | * matters in smart mode. ATAPI DMA is not currently supported. |
| 54 | * |
| 55 | * It seems the smart mode is a win for RAID1/RAID10 but otherwise not. |
| 56 | * |
| 57 | * TODO |
| 58 | * - ATAPI UDMA is ok but not MWDMA it seems |
| 59 | * - RAID configuration ioctls |
| 60 | * - Move to libata once it grows up |
| 61 | */ |
| 62 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 63 | #include <linux/types.h> |
| 64 | #include <linux/module.h> |
| 65 | #include <linux/pci.h> |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 66 | #include <linux/ide.h> |
| 67 | #include <linux/init.h> |
| 68 | |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 69 | #define DRV_NAME "it821x" |
| 70 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 71 | struct it821x_dev |
| 72 | { |
| 73 | unsigned int smart:1, /* Are we in smart raid mode */ |
| 74 | timing10:1; /* Rev 0x10 */ |
| 75 | u8 clock_mode; /* 0, ATA_50 or ATA_66 */ |
| 76 | u8 want[2][2]; /* Mode/Pri log for master slave */ |
| 77 | /* We need these for switching the clock when DMA goes on/off |
| 78 | The high byte is the 66Mhz timing */ |
| 79 | u16 pio[2]; /* Cached PIO values */ |
| 80 | u16 mwdma[2]; /* Cached MWDMA values */ |
| 81 | u16 udma[2]; /* Cached UDMA values (per drive) */ |
| 82 | }; |
| 83 | |
| 84 | #define ATA_66 0 |
| 85 | #define ATA_50 1 |
| 86 | #define ATA_ANY 2 |
| 87 | |
| 88 | #define UDMA_OFF 0 |
| 89 | #define MWDMA_OFF 0 |
| 90 | |
| 91 | /* |
| 92 | * We allow users to force the card into non raid mode without |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 93 | * flashing the alternative BIOS. This is also necessary right now |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 94 | * for embedded platforms that cannot run a PC BIOS but are using this |
| 95 | * device. |
| 96 | */ |
| 97 | |
| 98 | static int it8212_noraid; |
| 99 | |
| 100 | /** |
| 101 | * it821x_program - program the PIO/MWDMA registers |
| 102 | * @drive: drive to tune |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 103 | * @timing: timing info |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 104 | * |
| 105 | * Program the PIO/MWDMA timing for this channel according to the |
| 106 | * current clock. |
| 107 | */ |
| 108 | |
| 109 | static void it821x_program(ide_drive_t *drive, u16 timing) |
| 110 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 111 | ide_hwif_t *hwif = drive->hwif; |
| 112 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 113 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 114 | int channel = hwif->channel; |
| 115 | u8 conf; |
| 116 | |
| 117 | /* Program PIO/MWDMA timing bits */ |
| 118 | if(itdev->clock_mode == ATA_66) |
| 119 | conf = timing >> 8; |
| 120 | else |
| 121 | conf = timing & 0xFF; |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 122 | |
| 123 | pci_write_config_byte(dev, 0x54 + 4 * channel, conf); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /** |
| 127 | * it821x_program_udma - program the UDMA registers |
| 128 | * @drive: drive to tune |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 129 | * @timing: timing info |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 130 | * |
| 131 | * Program the UDMA timing for this drive according to the |
| 132 | * current clock. |
| 133 | */ |
| 134 | |
| 135 | static void it821x_program_udma(ide_drive_t *drive, u16 timing) |
| 136 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 137 | ide_hwif_t *hwif = drive->hwif; |
| 138 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 139 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 140 | int channel = hwif->channel; |
| 141 | int unit = drive->select.b.unit; |
| 142 | u8 conf; |
| 143 | |
| 144 | /* Program UDMA timing bits */ |
| 145 | if(itdev->clock_mode == ATA_66) |
| 146 | conf = timing >> 8; |
| 147 | else |
| 148 | conf = timing & 0xFF; |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 149 | |
| 150 | if (itdev->timing10 == 0) |
| 151 | pci_write_config_byte(dev, 0x56 + 4 * channel + unit, conf); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 152 | else { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 153 | pci_write_config_byte(dev, 0x56 + 4 * channel, conf); |
| 154 | pci_write_config_byte(dev, 0x56 + 4 * channel + 1, conf); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 155 | } |
| 156 | } |
| 157 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 158 | /** |
| 159 | * it821x_clock_strategy |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 160 | * @drive: drive to set up |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 161 | * |
| 162 | * Select between the 50 and 66Mhz base clocks to get the best |
| 163 | * results for this interface. |
| 164 | */ |
| 165 | |
| 166 | static void it821x_clock_strategy(ide_drive_t *drive) |
| 167 | { |
| 168 | ide_hwif_t *hwif = drive->hwif; |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 169 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 170 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 171 | |
| 172 | u8 unit = drive->select.b.unit; |
| 173 | ide_drive_t *pair = &hwif->drives[1-unit]; |
| 174 | |
| 175 | int clock, altclock; |
| 176 | u8 v; |
| 177 | int sel = 0; |
| 178 | |
| 179 | if(itdev->want[0][0] > itdev->want[1][0]) { |
| 180 | clock = itdev->want[0][1]; |
| 181 | altclock = itdev->want[1][1]; |
| 182 | } else { |
| 183 | clock = itdev->want[1][1]; |
| 184 | altclock = itdev->want[0][1]; |
| 185 | } |
| 186 | |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 187 | /* |
| 188 | * if both clocks can be used for the mode with the higher priority |
| 189 | * use the clock needed by the mode with the lower priority |
| 190 | */ |
| 191 | if (clock == ATA_ANY) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 192 | clock = altclock; |
| 193 | |
| 194 | /* Nobody cares - keep the same clock */ |
| 195 | if(clock == ATA_ANY) |
| 196 | return; |
| 197 | /* No change */ |
| 198 | if(clock == itdev->clock_mode) |
| 199 | return; |
| 200 | |
| 201 | /* Load this into the controller ? */ |
| 202 | if(clock == ATA_66) |
| 203 | itdev->clock_mode = ATA_66; |
| 204 | else { |
| 205 | itdev->clock_mode = ATA_50; |
| 206 | sel = 1; |
| 207 | } |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 208 | |
| 209 | pci_read_config_byte(dev, 0x50, &v); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 210 | v &= ~(1 << (1 + hwif->channel)); |
| 211 | v |= sel << (1 + hwif->channel); |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 212 | pci_write_config_byte(dev, 0x50, v); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 213 | |
| 214 | /* |
| 215 | * Reprogram the UDMA/PIO of the pair drive for the switch |
| 216 | * MWDMA will be dealt with by the dma switcher |
| 217 | */ |
| 218 | if(pair && itdev->udma[1-unit] != UDMA_OFF) { |
| 219 | it821x_program_udma(pair, itdev->udma[1-unit]); |
| 220 | it821x_program(pair, itdev->pio[1-unit]); |
| 221 | } |
| 222 | /* |
| 223 | * Reprogram the UDMA/PIO of our drive for the switch. |
| 224 | * MWDMA will be dealt with by the dma switcher |
| 225 | */ |
| 226 | if(itdev->udma[unit] != UDMA_OFF) { |
| 227 | it821x_program_udma(drive, itdev->udma[unit]); |
| 228 | it821x_program(drive, itdev->pio[unit]); |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | /** |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 233 | * it821x_set_pio_mode - set host controller for PIO mode |
| 234 | * @drive: drive |
| 235 | * @pio: PIO mode number |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 236 | * |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 237 | * Tune the host to the desired PIO mode taking into the consideration |
| 238 | * the maximum PIO mode supported by the other device on the cable. |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 239 | */ |
| 240 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 241 | static void it821x_set_pio_mode(ide_drive_t *drive, const u8 pio) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 242 | { |
| 243 | ide_hwif_t *hwif = drive->hwif; |
| 244 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 245 | int unit = drive->select.b.unit; |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 246 | ide_drive_t *pair = &hwif->drives[1 - unit]; |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 247 | u8 set_pio = pio; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 248 | |
| 249 | /* Spec says 89 ref driver uses 88 */ |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 250 | static u16 pio_timings[]= { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 }; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 251 | static u8 pio_want[] = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY }; |
| 252 | |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 253 | /* |
| 254 | * Compute the best PIO mode we can for a given device. We must |
| 255 | * pick a speed that does not cause problems with the other device |
| 256 | * on the cable. |
| 257 | */ |
| 258 | if (pair) { |
Bartlomiej Zolnierkiewicz | 2134758 | 2007-07-20 01:11:58 +0200 | [diff] [blame] | 259 | u8 pair_pio = ide_get_best_pio_mode(pair, 255, 4); |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 260 | /* trim PIO to the slowest of the master/slave */ |
| 261 | if (pair_pio < set_pio) |
| 262 | set_pio = pair_pio; |
| 263 | } |
| 264 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 265 | /* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */ |
Bartlomiej Zolnierkiewicz | 0e9b4e5 | 2007-05-05 22:03:50 +0200 | [diff] [blame] | 266 | itdev->want[unit][1] = pio_want[set_pio]; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 267 | itdev->want[unit][0] = 1; /* PIO is lowest priority */ |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 268 | itdev->pio[unit] = pio_timings[set_pio]; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 269 | it821x_clock_strategy(drive); |
| 270 | it821x_program(drive, itdev->pio[unit]); |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * it821x_tune_mwdma - tune a channel for MWDMA |
| 275 | * @drive: drive to set up |
| 276 | * @mode_wanted: the target operating mode |
| 277 | * |
| 278 | * Load the timing settings for this device mode into the |
| 279 | * controller when doing MWDMA in pass through mode. The caller |
| 280 | * must manage the whole lack of per device MWDMA/PIO timings and |
| 281 | * the shared MWDMA/PIO timing register. |
| 282 | */ |
| 283 | |
| 284 | static void it821x_tune_mwdma (ide_drive_t *drive, byte mode_wanted) |
| 285 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 286 | ide_hwif_t *hwif = drive->hwif; |
| 287 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 288 | struct it821x_dev *itdev = (void *)ide_get_hwifdata(hwif); |
| 289 | int unit = drive->select.b.unit; |
| 290 | int channel = hwif->channel; |
| 291 | u8 conf; |
| 292 | |
| 293 | static u16 dma[] = { 0x8866, 0x3222, 0x3121 }; |
| 294 | static u8 mwdma_want[] = { ATA_ANY, ATA_66, ATA_ANY }; |
| 295 | |
| 296 | itdev->want[unit][1] = mwdma_want[mode_wanted]; |
| 297 | itdev->want[unit][0] = 2; /* MWDMA is low priority */ |
| 298 | itdev->mwdma[unit] = dma[mode_wanted]; |
| 299 | itdev->udma[unit] = UDMA_OFF; |
| 300 | |
| 301 | /* UDMA bits off - Revision 0x10 do them in pairs */ |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 302 | pci_read_config_byte(dev, 0x50, &conf); |
| 303 | if (itdev->timing10) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 304 | conf |= channel ? 0x60: 0x18; |
| 305 | else |
| 306 | conf |= 1 << (3 + 2 * channel + unit); |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 307 | pci_write_config_byte(dev, 0x50, conf); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 308 | |
| 309 | it821x_clock_strategy(drive); |
| 310 | /* FIXME: do we need to program this ? */ |
| 311 | /* it821x_program(drive, itdev->mwdma[unit]); */ |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * it821x_tune_udma - tune a channel for UDMA |
| 316 | * @drive: drive to set up |
| 317 | * @mode_wanted: the target operating mode |
| 318 | * |
| 319 | * Load the timing settings for this device mode into the |
| 320 | * controller when doing UDMA modes in pass through. |
| 321 | */ |
| 322 | |
| 323 | static void it821x_tune_udma (ide_drive_t *drive, byte mode_wanted) |
| 324 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 325 | ide_hwif_t *hwif = drive->hwif; |
| 326 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 327 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 328 | int unit = drive->select.b.unit; |
| 329 | int channel = hwif->channel; |
| 330 | u8 conf; |
| 331 | |
| 332 | static u16 udma[] = { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 }; |
| 333 | static u8 udma_want[] = { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 }; |
| 334 | |
| 335 | itdev->want[unit][1] = udma_want[mode_wanted]; |
| 336 | itdev->want[unit][0] = 3; /* UDMA is high priority */ |
| 337 | itdev->mwdma[unit] = MWDMA_OFF; |
| 338 | itdev->udma[unit] = udma[mode_wanted]; |
| 339 | if(mode_wanted >= 5) |
| 340 | itdev->udma[unit] |= 0x8080; /* UDMA 5/6 select on */ |
| 341 | |
| 342 | /* UDMA on. Again revision 0x10 must do the pair */ |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 343 | pci_read_config_byte(dev, 0x50, &conf); |
| 344 | if (itdev->timing10) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 345 | conf &= channel ? 0x9F: 0xE7; |
| 346 | else |
| 347 | conf &= ~ (1 << (3 + 2 * channel + unit)); |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 348 | pci_write_config_byte(dev, 0x50, conf); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 349 | |
| 350 | it821x_clock_strategy(drive); |
| 351 | it821x_program_udma(drive, itdev->udma[unit]); |
| 352 | |
| 353 | } |
| 354 | |
| 355 | /** |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 356 | * it821x_dma_read - DMA hook |
| 357 | * @drive: drive for DMA |
| 358 | * |
| 359 | * The IT821x has a single timing register for MWDMA and for PIO |
| 360 | * operations. As we flip back and forth we have to reload the |
| 361 | * clock. In addition the rev 0x10 device only works if the same |
| 362 | * timing value is loaded into the master and slave UDMA clock |
| 363 | * so we must also reload that. |
| 364 | * |
| 365 | * FIXME: we could figure out in advance if we need to do reloads |
| 366 | */ |
| 367 | |
| 368 | static void it821x_dma_start(ide_drive_t *drive) |
| 369 | { |
| 370 | ide_hwif_t *hwif = drive->hwif; |
| 371 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 372 | int unit = drive->select.b.unit; |
| 373 | if(itdev->mwdma[unit] != MWDMA_OFF) |
| 374 | it821x_program(drive, itdev->mwdma[unit]); |
| 375 | else if(itdev->udma[unit] != UDMA_OFF && itdev->timing10) |
| 376 | it821x_program_udma(drive, itdev->udma[unit]); |
| 377 | ide_dma_start(drive); |
| 378 | } |
| 379 | |
| 380 | /** |
| 381 | * it821x_dma_write - DMA hook |
| 382 | * @drive: drive for DMA stop |
| 383 | * |
| 384 | * The IT821x has a single timing register for MWDMA and for PIO |
| 385 | * operations. As we flip back and forth we have to reload the |
| 386 | * clock. |
| 387 | */ |
| 388 | |
| 389 | static int it821x_dma_end(ide_drive_t *drive) |
| 390 | { |
| 391 | ide_hwif_t *hwif = drive->hwif; |
| 392 | int unit = drive->select.b.unit; |
| 393 | struct it821x_dev *itdev = ide_get_hwifdata(hwif); |
| 394 | int ret = __ide_dma_end(drive); |
| 395 | if(itdev->mwdma[unit] != MWDMA_OFF) |
| 396 | it821x_program(drive, itdev->pio[unit]); |
| 397 | return ret; |
| 398 | } |
| 399 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 400 | /** |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 401 | * it821x_set_dma_mode - set host controller for DMA mode |
| 402 | * @drive: drive |
| 403 | * @speed: DMA mode |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 404 | * |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 405 | * Tune the ITE chipset for the desired DMA mode. |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 406 | */ |
| 407 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 408 | static void it821x_set_dma_mode(ide_drive_t *drive, const u8 speed) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 409 | { |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 410 | /* |
| 411 | * MWDMA tuning is really hard because our MWDMA and PIO |
| 412 | * timings are kept in the same place. We can switch in the |
| 413 | * host dma on/off callbacks. |
| 414 | */ |
| 415 | if (speed >= XFER_UDMA_0 && speed <= XFER_UDMA_6) |
| 416 | it821x_tune_udma(drive, speed - XFER_UDMA_0); |
| 417 | else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) |
| 418 | it821x_tune_mwdma(drive, speed - XFER_MW_DMA_0); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 419 | } |
| 420 | |
| 421 | /** |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 422 | * it821x_cable_detect - cable detection |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 423 | * @hwif: interface to check |
| 424 | * |
| 425 | * Check for the presence of an ATA66 capable cable on the |
| 426 | * interface. Problematic as it seems some cards don't have |
| 427 | * the needed logic onboard. |
| 428 | */ |
| 429 | |
Bartlomiej Zolnierkiewicz | f454cbe | 2008-08-05 18:17:04 +0200 | [diff] [blame] | 430 | static u8 it821x_cable_detect(ide_hwif_t *hwif) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 431 | { |
| 432 | /* The reference driver also only does disk side */ |
Bartlomiej Zolnierkiewicz | 49521f9 | 2007-07-09 23:17:58 +0200 | [diff] [blame] | 433 | return ATA_CBL_PATA80; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | /** |
Bartlomiej Zolnierkiewicz | f01393e | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 437 | * it821x_quirkproc - post init callback |
| 438 | * @drive: drive |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 439 | * |
Bartlomiej Zolnierkiewicz | f01393e | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 440 | * This callback is run after the drive has been probed but |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 441 | * before anything gets attached. It allows drivers to do any |
| 442 | * final tuning that is needed, or fixups to work around bugs. |
| 443 | */ |
| 444 | |
Bartlomiej Zolnierkiewicz | 36de994 | 2008-08-05 18:17:03 +0200 | [diff] [blame] | 445 | static void it821x_quirkproc(ide_drive_t *drive) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 446 | { |
Bartlomiej Zolnierkiewicz | f01393e | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 447 | struct it821x_dev *itdev = ide_get_hwifdata(drive->hwif); |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 448 | u16 *id = drive->id; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 449 | |
Bartlomiej Zolnierkiewicz | f01393e | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 450 | if (!itdev->smart) { |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 451 | /* |
| 452 | * If we are in pass through mode then not much |
| 453 | * needs to be done, but we do bother to clear the |
| 454 | * IRQ mask as we may well be in PIO (eg rev 0x10) |
| 455 | * for now and we know unmasking is safe on this chipset. |
| 456 | */ |
Bartlomiej Zolnierkiewicz | 97100fc | 2008-10-13 21:39:36 +0200 | [diff] [blame^] | 457 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
Bartlomiej Zolnierkiewicz | f01393e | 2008-01-26 20:13:03 +0100 | [diff] [blame] | 458 | } else { |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 459 | /* |
| 460 | * Perform fixups on smart mode. We need to "lose" some |
| 461 | * capabilities the firmware lacks but does not filter, and |
| 462 | * also patch up some capability bits that it forgets to set |
| 463 | * in RAID mode. |
| 464 | */ |
| 465 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 466 | /* Check for RAID v native */ |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 467 | if (strstr((char *)&id[ATA_ID_PROD], |
| 468 | "Integrated Technology Express")) { |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 469 | /* In raid mode the ident block is slightly buggy |
| 470 | We need to set the bits so that the IDE layer knows |
| 471 | LBA28. LBA48 and DMA ar valid */ |
Bartlomiej Zolnierkiewicz | 48fb268 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 472 | id[ATA_ID_CAPABILITY] |= (3 << 8); /* LBA28, DMA */ |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 473 | id[ATA_ID_COMMAND_SET_2] |= 0x0400; /* LBA48 valid */ |
| 474 | id[ATA_ID_CFS_ENABLE_2] |= 0x0400; /* LBA48 on */ |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 475 | /* Reporting logic */ |
| 476 | printk(KERN_INFO "%s: IT8212 %sRAID %d volume", |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 477 | drive->name, id[147] ? "Bootable " : "", |
| 478 | id[ATA_ID_CSFO]); |
| 479 | if (id[ATA_ID_CSFO] != 1) |
| 480 | printk(KERN_CONT "(%dK stripe)", id[146]); |
| 481 | printk(KERN_CONT ".\n"); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 482 | } else { |
| 483 | /* Non RAID volume. Fixups to stop the core code |
| 484 | doing unsupported things */ |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 485 | id[ATA_ID_FIELD_VALID] &= 3; |
| 486 | id[ATA_ID_QUEUE_DEPTH] = 0; |
| 487 | id[ATA_ID_COMMAND_SET_1] = 0; |
| 488 | id[ATA_ID_COMMAND_SET_2] &= 0xC400; |
| 489 | id[ATA_ID_CFSSE] &= 0xC000; |
| 490 | id[ATA_ID_CFS_ENABLE_1] = 0; |
| 491 | id[ATA_ID_CFS_ENABLE_2] &= 0xC400; |
| 492 | id[ATA_ID_CSF_DEFAULT] &= 0xC000; |
| 493 | id[127] = 0; |
| 494 | id[ATA_ID_DLF] = 0; |
| 495 | id[ATA_ID_CSFO] = 0; |
| 496 | id[ATA_ID_CFA_POWER] = 0; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 497 | printk(KERN_INFO "%s: Performing identify fixups.\n", |
| 498 | drive->name); |
| 499 | } |
Bartlomiej Zolnierkiewicz | 0380dad | 2007-06-08 15:14:29 +0200 | [diff] [blame] | 500 | |
| 501 | /* |
| 502 | * Set MWDMA0 mode as enabled/support - just to tell |
| 503 | * IDE core that DMA is supported (it821x hardware |
| 504 | * takes care of DMA mode programming). |
| 505 | */ |
Bartlomiej Zolnierkiewicz | 48fb268 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 506 | if (ata_id_has_dma(id)) { |
Bartlomiej Zolnierkiewicz | 4dde449 | 2008-10-10 22:39:19 +0200 | [diff] [blame] | 507 | id[ATA_ID_MWDMA_MODES] |= 0x0101; |
Bartlomiej Zolnierkiewicz | 0380dad | 2007-06-08 15:14:29 +0200 | [diff] [blame] | 508 | drive->current_speed = XFER_MW_DMA_0; |
| 509 | } |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 510 | } |
| 511 | |
| 512 | } |
| 513 | |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 514 | static struct ide_dma_ops it821x_pass_through_dma_ops = { |
Dimitri Gorokhovik | 84e0f3f | 2008-07-16 20:33:34 +0200 | [diff] [blame] | 515 | .dma_host_set = ide_dma_host_set, |
| 516 | .dma_setup = ide_dma_setup, |
| 517 | .dma_exec_cmd = ide_dma_exec_cmd, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 518 | .dma_start = it821x_dma_start, |
| 519 | .dma_end = it821x_dma_end, |
Dimitri Gorokhovik | 84e0f3f | 2008-07-16 20:33:34 +0200 | [diff] [blame] | 520 | .dma_test_irq = ide_dma_test_irq, |
| 521 | .dma_timeout = ide_dma_timeout, |
| 522 | .dma_lost_irq = ide_dma_lost_irq, |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 523 | }; |
| 524 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 525 | /** |
| 526 | * init_hwif_it821x - set up hwif structs |
| 527 | * @hwif: interface to set up |
| 528 | * |
| 529 | * We do the basic set up of the interface structure. The IT8212 |
| 530 | * requires several custom handlers so we override the default |
| 531 | * ide DMA handlers appropriately |
| 532 | */ |
| 533 | |
| 534 | static void __devinit init_hwif_it821x(ide_hwif_t *hwif) |
| 535 | { |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 536 | struct pci_dev *dev = to_pci_dev(hwif->dev); |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 537 | struct ide_host *host = pci_get_drvdata(dev); |
| 538 | struct it821x_dev *itdevs = host->host_priv; |
| 539 | struct it821x_dev *idev = itdevs + hwif->channel; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 540 | u8 conf; |
| 541 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 542 | ide_set_hwifdata(hwif, idev); |
| 543 | |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 544 | pci_read_config_byte(dev, 0x50, &conf); |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 545 | if (conf & 1) { |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 546 | idev->smart = 1; |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 547 | hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 548 | /* Long I/O's although allowed in LBA48 space cause the |
| 549 | onboard firmware to enter the twighlight zone */ |
| 550 | hwif->rqsize = 256; |
| 551 | } |
| 552 | |
| 553 | /* Pull the current clocks from 0x50 also */ |
| 554 | if (conf & (1 << (1 + hwif->channel))) |
| 555 | idev->clock_mode = ATA_50; |
| 556 | else |
| 557 | idev->clock_mode = ATA_66; |
| 558 | |
| 559 | idev->want[0][1] = ATA_ANY; |
| 560 | idev->want[1][1] = ATA_ANY; |
| 561 | |
| 562 | /* |
| 563 | * Not in the docs but according to the reference driver |
Robert P. J. Day | 3a4fa0a | 2007-10-19 23:10:43 +0200 | [diff] [blame] | 564 | * this is necessary. |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 565 | */ |
| 566 | |
Bartlomiej Zolnierkiewicz | 3650165 | 2008-02-01 23:09:31 +0100 | [diff] [blame] | 567 | pci_read_config_byte(dev, 0x08, &conf); |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 568 | if (conf == 0x10) { |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 569 | idev->timing10 = 1; |
Bartlomiej Zolnierkiewicz | 33c1002 | 2007-10-19 00:30:06 +0200 | [diff] [blame] | 570 | hwif->host_flags |= IDE_HFLAG_NO_ATAPI_DMA; |
| 571 | if (idev->smart == 0) |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 572 | printk(KERN_WARNING DRV_NAME " %s: revision 0x10, " |
Bartlomiej Zolnierkiewicz | 28cfd8a | 2008-07-24 22:53:31 +0200 | [diff] [blame] | 573 | "workarounds activated\n", pci_name(dev)); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 574 | } |
| 575 | |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 576 | if (idev->smart == 0) { |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 577 | /* MWDMA/PIO clock switching for pass through mode */ |
Bartlomiej Zolnierkiewicz | 5e37bdc | 2008-04-26 22:25:24 +0200 | [diff] [blame] | 578 | hwif->dma_ops = &it821x_pass_through_dma_ops; |
Bartlomiej Zolnierkiewicz | 88b2b32 | 2007-10-13 17:47:51 +0200 | [diff] [blame] | 579 | } else |
| 580 | hwif->host_flags |= IDE_HFLAG_NO_SET_MODE; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 581 | |
Bartlomiej Zolnierkiewicz | 9ff6f72 | 2007-10-16 22:29:58 +0200 | [diff] [blame] | 582 | if (hwif->dma_base == 0) |
| 583 | return; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 584 | |
Bartlomiej Zolnierkiewicz | 5f8b6c3 | 2007-10-19 00:30:07 +0200 | [diff] [blame] | 585 | hwif->ultra_mask = ATA_UDMA6; |
| 586 | hwif->mwdma_mask = ATA_MWDMA2; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 587 | } |
| 588 | |
Bartlomiej Zolnierkiewicz | feb22b7 | 2008-10-10 22:39:32 +0200 | [diff] [blame] | 589 | static void it8212_disable_raid(struct pci_dev *dev) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 590 | { |
| 591 | /* Reset local CPU, and set BIOS not ready */ |
| 592 | pci_write_config_byte(dev, 0x5E, 0x01); |
| 593 | |
| 594 | /* Set to bypass mode, and reset PCI bus */ |
| 595 | pci_write_config_byte(dev, 0x50, 0x00); |
| 596 | pci_write_config_word(dev, PCI_COMMAND, |
| 597 | PCI_COMMAND_PARITY | PCI_COMMAND_IO | |
| 598 | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); |
| 599 | pci_write_config_word(dev, 0x40, 0xA0F3); |
| 600 | |
| 601 | pci_write_config_dword(dev,0x4C, 0x02040204); |
| 602 | pci_write_config_byte(dev, 0x42, 0x36); |
Alan Cox | 0c866b5 | 2006-02-03 03:04:58 -0800 | [diff] [blame] | 603 | pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x20); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 604 | } |
| 605 | |
Bartlomiej Zolnierkiewicz | feb22b7 | 2008-10-10 22:39:32 +0200 | [diff] [blame] | 606 | static unsigned int init_chipset_it821x(struct pci_dev *dev) |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 607 | { |
| 608 | u8 conf; |
| 609 | static char *mode[2] = { "pass through", "smart" }; |
| 610 | |
| 611 | /* Force the card into bypass mode if so requested */ |
| 612 | if (it8212_noraid) { |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 613 | printk(KERN_INFO DRV_NAME " %s: forcing bypass mode\n", |
Bartlomiej Zolnierkiewicz | 28cfd8a | 2008-07-24 22:53:31 +0200 | [diff] [blame] | 614 | pci_name(dev)); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 615 | it8212_disable_raid(dev); |
| 616 | } |
| 617 | pci_read_config_byte(dev, 0x50, &conf); |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 618 | printk(KERN_INFO DRV_NAME " %s: controller in %s mode\n", |
Bartlomiej Zolnierkiewicz | 28cfd8a | 2008-07-24 22:53:31 +0200 | [diff] [blame] | 619 | pci_name(dev), mode[conf & 1]); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 620 | return 0; |
| 621 | } |
| 622 | |
Bartlomiej Zolnierkiewicz | ac95bee | 2008-04-26 22:25:14 +0200 | [diff] [blame] | 623 | static const struct ide_port_ops it821x_port_ops = { |
| 624 | /* it821x_set_{pio,dma}_mode() are only used in pass-through mode */ |
| 625 | .set_pio_mode = it821x_set_pio_mode, |
| 626 | .set_dma_mode = it821x_set_dma_mode, |
| 627 | .quirkproc = it821x_quirkproc, |
| 628 | .cable_detect = it821x_cable_detect, |
| 629 | }; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 630 | |
Bartlomiej Zolnierkiewicz | 04ba6e7 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 631 | static const struct ide_port_info it821x_chipset __devinitdata = { |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 632 | .name = DRV_NAME, |
Bartlomiej Zolnierkiewicz | 04ba6e7 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 633 | .init_chipset = init_chipset_it821x, |
| 634 | .init_hwif = init_hwif_it821x, |
| 635 | .port_ops = &it821x_port_ops, |
| 636 | .pio_mask = ATA_PIO4, |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 637 | }; |
| 638 | |
| 639 | /** |
| 640 | * it821x_init_one - pci layer discovery entry |
| 641 | * @dev: PCI device |
| 642 | * @id: ident table entry |
| 643 | * |
| 644 | * Called by the PCI code when it finds an ITE821x controller. |
| 645 | * We then use the IDE PCI generic helper to do most of the work. |
| 646 | */ |
| 647 | |
| 648 | static int __devinit it821x_init_one(struct pci_dev *dev, const struct pci_device_id *id) |
| 649 | { |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 650 | struct it821x_dev *itdevs; |
| 651 | int rc; |
Bartlomiej Zolnierkiewicz | eb7a07e | 2008-04-26 17:36:42 +0200 | [diff] [blame] | 652 | |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 653 | itdevs = kzalloc(2 * sizeof(*itdevs), GFP_KERNEL); |
| 654 | if (itdevs == NULL) { |
Bartlomiej Zolnierkiewicz | ced3ec8 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 655 | printk(KERN_ERR DRV_NAME " %s: out of memory\n", pci_name(dev)); |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 656 | return -ENOMEM; |
Bartlomiej Zolnierkiewicz | eb7a07e | 2008-04-26 17:36:42 +0200 | [diff] [blame] | 657 | } |
| 658 | |
Bartlomiej Zolnierkiewicz | 04ba6e7 | 2008-07-24 22:53:32 +0200 | [diff] [blame] | 659 | rc = ide_pci_init_one(dev, &it821x_chipset, itdevs); |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 660 | if (rc) |
| 661 | kfree(itdevs); |
Bartlomiej Zolnierkiewicz | eb7a07e | 2008-04-26 17:36:42 +0200 | [diff] [blame] | 662 | |
Bartlomiej Zolnierkiewicz | 1d76d9d | 2008-07-24 22:53:16 +0200 | [diff] [blame] | 663 | return rc; |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 664 | } |
| 665 | |
Bartlomiej Zolnierkiewicz | 87d8b61 | 2008-07-24 22:53:22 +0200 | [diff] [blame] | 666 | static void __devexit it821x_remove(struct pci_dev *dev) |
| 667 | { |
| 668 | struct ide_host *host = pci_get_drvdata(dev); |
| 669 | struct it821x_dev *itdevs = host->host_priv; |
| 670 | |
| 671 | ide_pci_remove(dev); |
| 672 | kfree(itdevs); |
| 673 | } |
| 674 | |
Bartlomiej Zolnierkiewicz | 9cbcc5e | 2007-10-16 22:29:56 +0200 | [diff] [blame] | 675 | static const struct pci_device_id it821x_pci_tbl[] = { |
| 676 | { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), 0 }, |
| 677 | { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), 0 }, |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 678 | { 0, }, |
| 679 | }; |
| 680 | |
| 681 | MODULE_DEVICE_TABLE(pci, it821x_pci_tbl); |
| 682 | |
| 683 | static struct pci_driver driver = { |
| 684 | .name = "ITE821x IDE", |
| 685 | .id_table = it821x_pci_tbl, |
| 686 | .probe = it821x_init_one, |
Adrian Bunk | a69999e | 2008-08-18 21:40:03 +0200 | [diff] [blame] | 687 | .remove = __devexit_p(it821x_remove), |
Bartlomiej Zolnierkiewicz | feb22b7 | 2008-10-10 22:39:32 +0200 | [diff] [blame] | 688 | .suspend = ide_pci_suspend, |
| 689 | .resume = ide_pci_resume, |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 690 | }; |
| 691 | |
| 692 | static int __init it821x_ide_init(void) |
| 693 | { |
| 694 | return ide_pci_register_driver(&driver); |
| 695 | } |
| 696 | |
Bartlomiej Zolnierkiewicz | 87d8b61 | 2008-07-24 22:53:22 +0200 | [diff] [blame] | 697 | static void __exit it821x_ide_exit(void) |
| 698 | { |
| 699 | pci_unregister_driver(&driver); |
| 700 | } |
| 701 | |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 702 | module_init(it821x_ide_init); |
Bartlomiej Zolnierkiewicz | 87d8b61 | 2008-07-24 22:53:22 +0200 | [diff] [blame] | 703 | module_exit(it821x_ide_exit); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 704 | |
| 705 | module_param_named(noraid, it8212_noraid, int, S_IRUGO); |
Paul Bolle | da19566 | 2008-04-17 01:14:33 +0200 | [diff] [blame] | 706 | MODULE_PARM_DESC(noraid, "Force card into bypass mode"); |
Alan Cox | da9091e | 2005-06-27 15:24:30 -0700 | [diff] [blame] | 707 | |
| 708 | MODULE_AUTHOR("Alan Cox"); |
| 709 | MODULE_DESCRIPTION("PCI driver module for the ITE 821x"); |
| 710 | MODULE_LICENSE("GPL"); |