2 * pata_it821x.c - IT821x PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
10 * linux/drivers/ide/pci/it821x.c Version 0.09 December 2004
12 * Copyright (C) 2004 Red Hat <alan@redhat.com>
14 * May be copied or modified under the terms of the GNU General Public License
15 * Based in part on the ITE vendor provided SCSI driver.
17 * Documentation available from
18 * http://www.ite.com.tw/pc/IT8212F_V04.pdf
19 * Some other documents are NDA.
21 * The ITE8212 isn't exactly a standard IDE controller. It has two
22 * modes. In pass through mode then it is an IDE controller. In its smart
23 * mode its actually quite a capable hardware raid controller disguised
24 * as an IDE controller. Smart mode only understands DMA read/write and
25 * identify, none of the fancier commands apply. The IT8211 is identical
26 * in other respects but lacks the raid mode.
29 * o Rev 0x10 also requires master/slave hold the same DMA timings and
30 * cannot do ATAPI MWDMA.
31 * o The identify data for raid volumes lacks CHS info (technically ok)
32 * but also fails to set the LBA28 and other bits. We fix these in
33 * the IDE probe quirk code.
34 * o If you write LBA48 sized I/O's (ie > 256 sector) in smart mode
35 * raid then the controller firmware dies
36 * o Smart mode without RAID doesn't clear all the necessary identify
37 * bits to reduce the command set to the one used
39 * This has a few impacts on the driver
40 * - In pass through mode we do all the work you would expect
41 * - In smart mode the clocking set up is done by the controller generally
42 * but we must watch the other limits and filter.
43 * - There are a few extra vendor commands that actually talk to the
44 * controller but only work PIO with no IRQ.
46 * Vendor areas of the identify block in smart mode are used for the
47 * timing and policy set up. Each HDD in raid mode also has a serial
48 * block on the disk. The hardware extra commands are get/set chip status,
49 * rebuild, get rebuild status.
51 * In Linux the driver supports pass through mode as if the device was
52 * just another IDE controller. If the smart mode is running then
53 * volumes are managed by the controller firmware and each IDE "disk"
54 * is a raid volume. Even more cute - the controller can do automated
55 * hotplug and rebuild.
57 * The pass through controller itself is a little demented. It has a
58 * flaw that it has a single set of PIO/MWDMA timings per channel so
59 * non UDMA devices restrict each others performance. It also has a
60 * single clock source per channel so mixed UDMA100/133 performance
61 * isn't perfect and we have to pick a clock. Thankfully none of this
62 * matters in smart mode. ATAPI DMA is not currently supported.
64 * It seems the smart mode is a win for RAID1/RAID10 but otherwise not.
67 * - ATAPI and other speed filtering
68 * - RAID configuration ioctls
71 #include <linux/kernel.h>
72 #include <linux/module.h>
73 #include <linux/pci.h>
74 #include <linux/init.h>
75 #include <linux/blkdev.h>
76 #include <linux/delay.h>
77 #include <scsi/scsi_host.h>
78 #include <linux/libata.h>
81 #define DRV_NAME "pata_it821x"
82 #define DRV_VERSION "0.3.6"
86 unsigned int smart:1, /* Are we in smart raid mode */
87 timing10:1; /* Rev 0x10 */
88 u8 clock_mode; /* 0, ATA_50 or ATA_66 */
89 u8 want[2][2]; /* Mode/Pri log for master slave */
90 /* We need these for switching the clock when DMA goes on/off
91 The high byte is the 66Mhz timing */
92 u16 pio[2]; /* Cached PIO values */
93 u16 mwdma[2]; /* Cached MWDMA values */
94 u16 udma[2]; /* Cached UDMA values (per drive) */
95 u16 last_device; /* Master or slave loaded ? */
106 * We allow users to force the card into non raid mode without
107 * flashing the alternative BIOS. This is also neccessary right now
108 * for embedded platforms that cannot run a PC BIOS but are using this
112 static int it8212_noraid;
115 * it821x_program - program the PIO/MWDMA registers
117 * @adev: Device to program
118 * @timing: Timing value (66Mhz in top 8bits, 50 in the low 8)
120 * Program the PIO/MWDMA timing for this channel according to the
121 * current clock. These share the same register so are managed by
122 * the DMA start/stop sequence as with the old driver.
125 static void it821x_program(struct ata_port *ap, struct ata_device *adev, u16 timing)
127 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
128 struct it821x_dev *itdev = ap->private_data;
129 int channel = ap->port_no;
132 /* Program PIO/MWDMA timing bits */
133 if (itdev->clock_mode == ATA_66)
136 conf = timing & 0xFF;
137 pci_write_config_byte(pdev, 0x54 + 4 * channel, conf);
142 * it821x_program_udma - program the UDMA registers
144 * @adev: ATA device to update
145 * @timing: Timing bits. Top 8 are for 66Mhz bottom for 50Mhz
147 * Program the UDMA timing for this drive according to the
148 * current clock. Handles the dual clocks and also knows about
149 * the errata on the 0x10 revision. The UDMA errata is partly handled
150 * here and partly in start_dma.
153 static void it821x_program_udma(struct ata_port *ap, struct ata_device *adev, u16 timing)
155 struct it821x_dev *itdev = ap->private_data;
156 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
157 int channel = ap->port_no;
158 int unit = adev->devno;
161 /* Program UDMA timing bits */
162 if (itdev->clock_mode == ATA_66)
165 conf = timing & 0xFF;
166 if (itdev->timing10 == 0)
167 pci_write_config_byte(pdev, 0x56 + 4 * channel + unit, conf);
169 /* Early revision must be programmed for both together */
170 pci_write_config_byte(pdev, 0x56 + 4 * channel, conf);
171 pci_write_config_byte(pdev, 0x56 + 4 * channel + 1, conf);
176 * it821x_clock_strategy
178 * @adev: ATA device being updated
180 * Select between the 50 and 66Mhz base clocks to get the best
181 * results for this interface.
184 static void it821x_clock_strategy(struct ata_port *ap, struct ata_device *adev)
186 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
187 struct it821x_dev *itdev = ap->private_data;
188 u8 unit = adev->devno;
189 struct ata_device *pair = ata_dev_pair(adev);
195 /* Look for the most wanted clocking */
196 if (itdev->want[0][0] > itdev->want[1][0]) {
197 clock = itdev->want[0][1];
198 altclock = itdev->want[1][1];
200 clock = itdev->want[1][1];
201 altclock = itdev->want[0][1];
204 /* Master doesn't care does the slave ? */
205 if (clock == ATA_ANY)
208 /* Nobody cares - keep the same clock */
209 if (clock == ATA_ANY)
212 if (clock == itdev->clock_mode)
215 /* Load this into the controller */
217 itdev->clock_mode = ATA_66;
219 itdev->clock_mode = ATA_50;
222 pci_read_config_byte(pdev, 0x50, &v);
223 v &= ~(1 << (1 + ap->port_no));
224 v |= sel << (1 + ap->port_no);
225 pci_write_config_byte(pdev, 0x50, v);
228 * Reprogram the UDMA/PIO of the pair drive for the switch
229 * MWDMA will be dealt with by the dma switcher
231 if (pair && itdev->udma[1-unit] != UDMA_OFF) {
232 it821x_program_udma(ap, pair, itdev->udma[1-unit]);
233 it821x_program(ap, pair, itdev->pio[1-unit]);
236 * Reprogram the UDMA/PIO of our drive for the switch.
237 * MWDMA will be dealt with by the dma switcher
239 if (itdev->udma[unit] != UDMA_OFF) {
240 it821x_program_udma(ap, adev, itdev->udma[unit]);
241 it821x_program(ap, adev, itdev->pio[unit]);
246 * it821x_passthru_set_piomode - set PIO mode data
250 * Configure for PIO mode. This is complicated as the register is
251 * shared by PIO and MWDMA and for both channels.
254 static void it821x_passthru_set_piomode(struct ata_port *ap, struct ata_device *adev)
256 /* Spec says 89 ref driver uses 88 */
257 static const u16 pio[] = { 0xAA88, 0xA382, 0xA181, 0x3332, 0x3121 };
258 static const u8 pio_want[] = { ATA_66, ATA_66, ATA_66, ATA_66, ATA_ANY };
260 struct it821x_dev *itdev = ap->private_data;
261 int unit = adev->devno;
262 int mode_wanted = adev->pio_mode - XFER_PIO_0;
264 /* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */
265 itdev->want[unit][1] = pio_want[mode_wanted];
266 itdev->want[unit][0] = 1; /* PIO is lowest priority */
267 itdev->pio[unit] = pio[mode_wanted];
268 it821x_clock_strategy(ap, adev);
269 it821x_program(ap, adev, itdev->pio[unit]);
273 * it821x_passthru_set_dmamode - set initial DMA mode data
277 * Set up the DMA modes. The actions taken depend heavily on the mode
278 * to use. If UDMA is used as is hopefully the usual case then the
279 * timing register is private and we need only consider the clock. If
280 * we are using MWDMA then we have to manage the setting ourself as
281 * we switch devices and mode.
284 static void it821x_passthru_set_dmamode(struct ata_port *ap, struct ata_device *adev)
286 static const u16 dma[] = { 0x8866, 0x3222, 0x3121 };
287 static const u8 mwdma_want[] = { ATA_ANY, ATA_66, ATA_ANY };
288 static const u16 udma[] = { 0x4433, 0x4231, 0x3121, 0x2121, 0x1111, 0x2211, 0x1111 };
289 static const u8 udma_want[] = { ATA_ANY, ATA_50, ATA_ANY, ATA_66, ATA_66, ATA_50, ATA_66 };
291 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
292 struct it821x_dev *itdev = ap->private_data;
293 int channel = ap->port_no;
294 int unit = adev->devno;
297 if (adev->dma_mode >= XFER_UDMA_0) {
298 int mode_wanted = adev->dma_mode - XFER_UDMA_0;
300 itdev->want[unit][1] = udma_want[mode_wanted];
301 itdev->want[unit][0] = 3; /* UDMA is high priority */
302 itdev->mwdma[unit] = MWDMA_OFF;
303 itdev->udma[unit] = udma[mode_wanted];
304 if (mode_wanted >= 5)
305 itdev->udma[unit] |= 0x8080; /* UDMA 5/6 select on */
307 /* UDMA on. Again revision 0x10 must do the pair */
308 pci_read_config_byte(pdev, 0x50, &conf);
310 conf &= channel ? 0x9F: 0xE7;
312 conf &= ~ (1 << (3 + 2 * channel + unit));
313 pci_write_config_byte(pdev, 0x50, conf);
314 it821x_clock_strategy(ap, adev);
315 it821x_program_udma(ap, adev, itdev->udma[unit]);
317 int mode_wanted = adev->dma_mode - XFER_MW_DMA_0;
319 itdev->want[unit][1] = mwdma_want[mode_wanted];
320 itdev->want[unit][0] = 2; /* MWDMA is low priority */
321 itdev->mwdma[unit] = dma[mode_wanted];
322 itdev->udma[unit] = UDMA_OFF;
324 /* UDMA bits off - Revision 0x10 do them in pairs */
325 pci_read_config_byte(pdev, 0x50, &conf);
327 conf |= channel ? 0x60: 0x18;
329 conf |= 1 << (3 + 2 * channel + unit);
330 pci_write_config_byte(pdev, 0x50, conf);
331 it821x_clock_strategy(ap, adev);
336 * it821x_passthru_dma_start - DMA start callback
337 * @qc: Command in progress
339 * Usually drivers set the DMA timing at the point the set_dmamode call
340 * is made. IT821x however requires we load new timings on the
341 * transitions in some cases.
344 static void it821x_passthru_bmdma_start(struct ata_queued_cmd *qc)
346 struct ata_port *ap = qc->ap;
347 struct ata_device *adev = qc->dev;
348 struct it821x_dev *itdev = ap->private_data;
349 int unit = adev->devno;
351 if (itdev->mwdma[unit] != MWDMA_OFF)
352 it821x_program(ap, adev, itdev->mwdma[unit]);
353 else if (itdev->udma[unit] != UDMA_OFF && itdev->timing10)
354 it821x_program_udma(ap, adev, itdev->udma[unit]);
359 * it821x_passthru_dma_stop - DMA stop callback
362 * We loaded new timings in dma_start, as a result we need to restore
363 * the PIO timings in dma_stop so that the next command issue gets the
364 * right clock values.
367 static void it821x_passthru_bmdma_stop(struct ata_queued_cmd *qc)
369 struct ata_port *ap = qc->ap;
370 struct ata_device *adev = qc->dev;
371 struct it821x_dev *itdev = ap->private_data;
372 int unit = adev->devno;
375 if (itdev->mwdma[unit] != MWDMA_OFF)
376 it821x_program(ap, adev, itdev->pio[unit]);
381 * it821x_passthru_dev_select - Select master/slave
383 * @device: Device number (not pointer)
385 * Device selection hook. If neccessary perform clock switching
388 static void it821x_passthru_dev_select(struct ata_port *ap,
391 struct it821x_dev *itdev = ap->private_data;
392 if (itdev && device != itdev->last_device) {
393 struct ata_device *adev = &ap->device[device];
394 it821x_program(ap, adev, itdev->pio[adev->devno]);
395 itdev->last_device = device;
397 ata_std_dev_select(ap, device);
401 * it821x_smart_qc_issue_prot - wrap qc issue prot
404 * Wrap the command issue sequence for the IT821x. We need to
405 * perform out own device selection timing loads before the
406 * usual happenings kick off
409 static unsigned int it821x_smart_qc_issue_prot(struct ata_queued_cmd *qc)
411 switch(qc->tf.command)
413 /* Commands the firmware supports */
415 case ATA_CMD_READ_EXT:
417 case ATA_CMD_WRITE_EXT:
418 case ATA_CMD_PIO_READ:
419 case ATA_CMD_PIO_READ_EXT:
420 case ATA_CMD_PIO_WRITE:
421 case ATA_CMD_PIO_WRITE_EXT:
422 case ATA_CMD_READ_MULTI:
423 case ATA_CMD_READ_MULTI_EXT:
424 case ATA_CMD_WRITE_MULTI:
425 case ATA_CMD_WRITE_MULTI_EXT:
427 /* Arguably should just no-op this one */
428 case ATA_CMD_SET_FEATURES:
429 return ata_qc_issue_prot(qc);
431 printk(KERN_DEBUG "it821x: can't process command 0x%02X\n", qc->tf.command);
432 return AC_ERR_INVALID;
436 * it821x_passthru_qc_issue_prot - wrap qc issue prot
439 * Wrap the command issue sequence for the IT821x. We need to
440 * perform out own device selection timing loads before the
441 * usual happenings kick off
444 static unsigned int it821x_passthru_qc_issue_prot(struct ata_queued_cmd *qc)
446 it821x_passthru_dev_select(qc->ap, qc->dev->devno);
447 return ata_qc_issue_prot(qc);
451 * it821x_smart_set_mode - mode setting
452 * @ap: interface to set up
453 * @unused: device that failed (error only)
455 * Use a non standard set_mode function. We don't want to be tuned.
456 * The BIOS configured everything. Our job is not to fiddle. We
457 * read the dma enabled bits from the PCI configuration of the device
461 static int it821x_smart_set_mode(struct ata_port *ap, struct ata_device **unused)
466 /* Bits 5 and 6 indicate if DMA is active on master/slave */
467 /* It is possible that BMDMA isn't allocated */
468 if (ap->ioaddr.bmdma_addr)
469 dma_enabled = ioread8(ap->ioaddr.bmdma_addr + ATA_DMA_CMD);
471 for (i = 0; i < ATA_MAX_DEVICES; i++) {
472 struct ata_device *dev = &ap->device[i];
473 if (ata_dev_enabled(dev)) {
474 /* We don't really care */
475 dev->pio_mode = XFER_PIO_0;
476 dev->dma_mode = XFER_MW_DMA_0;
477 /* We do need the right mode information for DMA or PIO
478 and this comes from the current configuration flags */
479 if (dma_enabled & (1 << (5 + i))) {
480 ata_dev_printk(dev, KERN_INFO, "configured for DMA\n");
481 dev->xfer_mode = XFER_MW_DMA_0;
482 dev->xfer_shift = ATA_SHIFT_MWDMA;
483 dev->flags &= ~ATA_DFLAG_PIO;
485 ata_dev_printk(dev, KERN_INFO, "configured for PIO\n");
486 dev->xfer_mode = XFER_PIO_0;
487 dev->xfer_shift = ATA_SHIFT_PIO;
488 dev->flags |= ATA_DFLAG_PIO;
496 * it821x_dev_config - Called each device identify
497 * @adev: Device that has just been identified
499 * Perform the initial setup needed for each device that is chip
500 * special. In our case we need to lock the sector count to avoid
501 * blowing the brains out of the firmware with large LBA48 requests
503 * FIXME: When FUA appears we need to block FUA too. And SMART and
504 * basically we need to filter commands for this chip.
507 static void it821x_dev_config(struct ata_device *adev)
509 unsigned char model_num[ATA_ID_PROD_LEN + 1];
511 ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));
513 if (adev->max_sectors > 255)
514 adev->max_sectors = 255;
516 if (strstr(model_num, "Integrated Technology Express")) {
518 printk(KERN_INFO "IT821x %sRAID%d volume",
519 adev->id[147]?"Bootable ":"",
521 if (adev->id[129] != 1)
522 printk("(%dK stripe)", adev->id[146]);
529 * it821x_check_atapi_dma - ATAPI DMA handler
530 * @qc: Command we are about to issue
532 * Decide if this ATAPI command can be issued by DMA on this
533 * controller. Return 0 if it can be.
536 static int it821x_check_atapi_dma(struct ata_queued_cmd *qc)
538 struct ata_port *ap = qc->ap;
539 struct it821x_dev *itdev = ap->private_data;
541 /* No ATAPI DMA in smart mode */
544 /* No ATAPI DMA on rev 10 */
553 * it821x_port_start - port setup
554 * @ap: ATA port being set up
556 * The it821x needs to maintain private data structures and also to
557 * use the standard PCI interface which lacks support for this
558 * functionality. We instead set up the private data on the port
559 * start hook, and tear it down on port stop
562 static int it821x_port_start(struct ata_port *ap)
564 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
565 struct it821x_dev *itdev;
568 int ret = ata_port_start(ap);
572 itdev = devm_kzalloc(&pdev->dev, sizeof(struct it821x_dev), GFP_KERNEL);
575 ap->private_data = itdev;
577 pci_read_config_byte(pdev, 0x50, &conf);
581 /* Long I/O's although allowed in LBA48 space cause the
582 onboard firmware to enter the twighlight zone */
583 /* No ATAPI DMA in this mode either */
585 /* Pull the current clocks from 0x50 */
586 if (conf & (1 << (1 + ap->port_no)))
587 itdev->clock_mode = ATA_50;
589 itdev->clock_mode = ATA_66;
591 itdev->want[0][1] = ATA_ANY;
592 itdev->want[1][1] = ATA_ANY;
593 itdev->last_device = -1;
595 pci_read_config_byte(pdev, PCI_REVISION_ID, &conf);
598 /* Need to disable ATAPI DMA for this case */
600 printk(KERN_WARNING DRV_NAME": Revision 0x10, workarounds activated.\n");
606 static struct scsi_host_template it821x_sht = {
607 .module = THIS_MODULE,
609 .ioctl = ata_scsi_ioctl,
610 .queuecommand = ata_scsi_queuecmd,
611 .can_queue = ATA_DEF_QUEUE,
612 .this_id = ATA_SHT_THIS_ID,
613 .sg_tablesize = LIBATA_MAX_PRD,
614 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
615 .emulated = ATA_SHT_EMULATED,
616 .use_clustering = ATA_SHT_USE_CLUSTERING,
617 .proc_name = DRV_NAME,
618 .dma_boundary = ATA_DMA_BOUNDARY,
619 .slave_configure = ata_scsi_slave_config,
620 .slave_destroy = ata_scsi_slave_destroy,
621 .bios_param = ata_std_bios_param,
624 static struct ata_port_operations it821x_smart_port_ops = {
625 .set_mode = it821x_smart_set_mode,
626 .port_disable = ata_port_disable,
627 .tf_load = ata_tf_load,
628 .tf_read = ata_tf_read,
629 .mode_filter = ata_pci_default_filter,
631 .check_status = ata_check_status,
632 .check_atapi_dma= it821x_check_atapi_dma,
633 .exec_command = ata_exec_command,
634 .dev_select = ata_std_dev_select,
635 .dev_config = it821x_dev_config,
637 .freeze = ata_bmdma_freeze,
638 .thaw = ata_bmdma_thaw,
639 .error_handler = ata_bmdma_error_handler,
640 .post_internal_cmd = ata_bmdma_post_internal_cmd,
641 .cable_detect = ata_cable_unknown,
643 .bmdma_setup = ata_bmdma_setup,
644 .bmdma_start = ata_bmdma_start,
645 .bmdma_stop = ata_bmdma_stop,
646 .bmdma_status = ata_bmdma_status,
648 .qc_prep = ata_qc_prep,
649 .qc_issue = it821x_smart_qc_issue_prot,
651 .data_xfer = ata_data_xfer,
653 .irq_handler = ata_interrupt,
654 .irq_clear = ata_bmdma_irq_clear,
655 .irq_on = ata_irq_on,
656 .irq_ack = ata_irq_ack,
658 .port_start = it821x_port_start,
661 static struct ata_port_operations it821x_passthru_port_ops = {
662 .port_disable = ata_port_disable,
663 .set_piomode = it821x_passthru_set_piomode,
664 .set_dmamode = it821x_passthru_set_dmamode,
665 .mode_filter = ata_pci_default_filter,
667 .tf_load = ata_tf_load,
668 .tf_read = ata_tf_read,
669 .check_status = ata_check_status,
670 .exec_command = ata_exec_command,
671 .check_atapi_dma= it821x_check_atapi_dma,
672 .dev_select = it821x_passthru_dev_select,
674 .freeze = ata_bmdma_freeze,
675 .thaw = ata_bmdma_thaw,
676 .error_handler = ata_bmdma_error_handler,
677 .post_internal_cmd = ata_bmdma_post_internal_cmd,
678 .cable_detect = ata_cable_unknown,
680 .bmdma_setup = ata_bmdma_setup,
681 .bmdma_start = it821x_passthru_bmdma_start,
682 .bmdma_stop = it821x_passthru_bmdma_stop,
683 .bmdma_status = ata_bmdma_status,
685 .qc_prep = ata_qc_prep,
686 .qc_issue = it821x_passthru_qc_issue_prot,
688 .data_xfer = ata_data_xfer,
690 .irq_clear = ata_bmdma_irq_clear,
691 .irq_handler = ata_interrupt,
692 .irq_on = ata_irq_on,
693 .irq_ack = ata_irq_ack,
695 .port_start = it821x_port_start,
698 static void __devinit it821x_disable_raid(struct pci_dev *pdev)
700 /* Reset local CPU, and set BIOS not ready */
701 pci_write_config_byte(pdev, 0x5E, 0x01);
703 /* Set to bypass mode, and reset PCI bus */
704 pci_write_config_byte(pdev, 0x50, 0x00);
705 pci_write_config_word(pdev, PCI_COMMAND,
706 PCI_COMMAND_PARITY | PCI_COMMAND_IO |
707 PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
708 pci_write_config_word(pdev, 0x40, 0xA0F3);
710 pci_write_config_dword(pdev,0x4C, 0x02040204);
711 pci_write_config_byte(pdev, 0x42, 0x36);
712 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x20);
716 static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
720 static const struct ata_port_info info_smart = {
722 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
725 .port_ops = &it821x_smart_port_ops
727 static const struct ata_port_info info_passthru = {
729 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
733 .port_ops = &it821x_passthru_port_ops
736 const struct ata_port_info *ppi[] = { NULL, NULL };
737 static char *mode[2] = { "pass through", "smart" };
739 /* Force the card into bypass mode if so requested */
741 printk(KERN_INFO DRV_NAME ": forcing bypass mode.\n");
742 it821x_disable_raid(pdev);
744 pci_read_config_byte(pdev, 0x50, &conf);
747 printk(KERN_INFO DRV_NAME ": controller in %s mode.\n", mode[conf]);
749 ppi[0] = &info_passthru;
751 ppi[0] = &info_smart;
753 return ata_pci_init_one(pdev, ppi);
757 static int it821x_reinit_one(struct pci_dev *pdev)
759 /* Resume - turn raid back off if need be */
761 it821x_disable_raid(pdev);
762 return ata_pci_device_resume(pdev);
766 static const struct pci_device_id it821x[] = {
767 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), },
768 { PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), },
773 static struct pci_driver it821x_pci_driver = {
776 .probe = it821x_init_one,
777 .remove = ata_pci_remove_one,
779 .suspend = ata_pci_device_suspend,
780 .resume = it821x_reinit_one,
784 static int __init it821x_init(void)
786 return pci_register_driver(&it821x_pci_driver);
789 static void __exit it821x_exit(void)
791 pci_unregister_driver(&it821x_pci_driver);
794 MODULE_AUTHOR("Alan Cox");
795 MODULE_DESCRIPTION("low-level driver for the IT8211/IT8212 IDE RAID controller");
796 MODULE_LICENSE("GPL");
797 MODULE_DEVICE_TABLE(pci, it821x);
798 MODULE_VERSION(DRV_VERSION);
801 module_param_named(noraid, it8212_noraid, int, S_IRUGO);
802 MODULE_PARM_DESC(it8212_noraid, "Force card into bypass mode");
804 module_init(it821x_init);
805 module_exit(it821x_exit);