2  * pata_it821x.c 	- IT821x PATA for new ATA layer
35  *  o	If you write LBA48 sized I/O's (ie > 256 sector) in smart mode
41  *  - In pass through mode we do all the work you would expect
42  *  - In smart mode the clocking set up is done by the controller generally
44  *  - There are a few extra vendor commands that actually talk to the
55  *  is a raid volume. Even more cute - the controller can do automated
68  *	-	ATAPI and other speed filtering
69  *	-	RAID configuration ioctls
116  *	it821x_program	-	program the PIO/MWDMA registers
128 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_program()
129 	struct it821x_dev *itdev = ap->private_data;  in it821x_program()
130 	int channel = ap->port_no;  in it821x_program()
134 	if (itdev->clock_mode == ATA_66)  in it821x_program()
143  *	it821x_program_udma	-	program the UDMA registers
156 	struct it821x_dev *itdev = ap->private_data;  in it821x_program_udma()
157 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_program_udma()
158 	int channel = ap->port_no;  in it821x_program_udma()
159 	int unit = adev->devno;  in it821x_program_udma()
163 	if (itdev->clock_mode == ATA_66)  in it821x_program_udma()
167 	if (itdev->timing10 == 0)  in it821x_program_udma()
187 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_clock_strategy()
188 	struct it821x_dev *itdev = ap->private_data;  in it821x_clock_strategy()
189 	u8 unit = adev->devno;  in it821x_clock_strategy()
197 	if (itdev->want[0][0] > itdev->want[1][0]) {  in it821x_clock_strategy()
198 		clock = itdev->want[0][1];  in it821x_clock_strategy()
199 		altclock = itdev->want[1][1];  in it821x_clock_strategy()
201 		clock = itdev->want[1][1];  in it821x_clock_strategy()
202 		altclock = itdev->want[0][1];  in it821x_clock_strategy()
209 	/* Nobody cares - keep the same clock */  in it821x_clock_strategy()
213 	if (clock == itdev->clock_mode)  in it821x_clock_strategy()
218 		itdev->clock_mode = ATA_66;  in it821x_clock_strategy()
220 		itdev->clock_mode = ATA_50;  in it821x_clock_strategy()
224 	v &= ~(1 << (1 + ap->port_no));  in it821x_clock_strategy()
225 	v |= sel << (1 + ap->port_no);  in it821x_clock_strategy()
232 	if (pair && itdev->udma[1-unit] != UDMA_OFF) {  in it821x_clock_strategy()
233 		it821x_program_udma(ap, pair, itdev->udma[1-unit]);  in it821x_clock_strategy()
234 		it821x_program(ap, pair, itdev->pio[1-unit]);  in it821x_clock_strategy()
240 	if (itdev->udma[unit] != UDMA_OFF) {  in it821x_clock_strategy()
241 		it821x_program_udma(ap, adev, itdev->udma[unit]);  in it821x_clock_strategy()
242 		it821x_program(ap, adev, itdev->pio[unit]);  in it821x_clock_strategy()
247  *	it821x_passthru_set_piomode	-	set PIO mode data
261 	struct it821x_dev *itdev = ap->private_data;  in it821x_passthru_set_piomode()
262 	int unit = adev->devno;  in it821x_passthru_set_piomode()
263 	int mode_wanted = adev->pio_mode - XFER_PIO_0;  in it821x_passthru_set_piomode()
265 	/* We prefer 66Mhz clock for PIO 0-3, don't care for PIO4 */  in it821x_passthru_set_piomode()
266 	itdev->want[unit][1] = pio_want[mode_wanted];  in it821x_passthru_set_piomode()
267 	itdev->want[unit][0] = 1;	/* PIO is lowest priority */  in it821x_passthru_set_piomode()
268 	itdev->pio[unit] = pio[mode_wanted];  in it821x_passthru_set_piomode()
270 	it821x_program(ap, adev, itdev->pio[unit]);  in it821x_passthru_set_piomode()
274  *	it821x_passthru_set_dmamode	-	set initial DMA mode data
292 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_passthru_set_dmamode()
293 	struct it821x_dev *itdev = ap->private_data;  in it821x_passthru_set_dmamode()
294 	int channel = ap->port_no;  in it821x_passthru_set_dmamode()
295 	int unit = adev->devno;  in it821x_passthru_set_dmamode()
298 	if (adev->dma_mode >= XFER_UDMA_0) {  in it821x_passthru_set_dmamode()
299 		int mode_wanted = adev->dma_mode - XFER_UDMA_0;  in it821x_passthru_set_dmamode()
301 		itdev->want[unit][1] = udma_want[mode_wanted];  in it821x_passthru_set_dmamode()
302 		itdev->want[unit][0] = 3;	/* UDMA is high priority */  in it821x_passthru_set_dmamode()
303 		itdev->mwdma[unit] = MWDMA_OFF;  in it821x_passthru_set_dmamode()
304 		itdev->udma[unit] = udma[mode_wanted];  in it821x_passthru_set_dmamode()
306 			itdev->udma[unit] |= 0x8080;	/* UDMA 5/6 select on */  in it821x_passthru_set_dmamode()
310 		if (itdev->timing10)  in it821x_passthru_set_dmamode()
316 		it821x_program_udma(ap, adev, itdev->udma[unit]);  in it821x_passthru_set_dmamode()
318 		int mode_wanted = adev->dma_mode - XFER_MW_DMA_0;  in it821x_passthru_set_dmamode()
320 		itdev->want[unit][1] = mwdma_want[mode_wanted];  in it821x_passthru_set_dmamode()
321 		itdev->want[unit][0] = 2;	/* MWDMA is low priority */  in it821x_passthru_set_dmamode()
322 		itdev->mwdma[unit] = dma[mode_wanted];  in it821x_passthru_set_dmamode()
323 		itdev->udma[unit] = UDMA_OFF;  in it821x_passthru_set_dmamode()
325 		/* UDMA bits off - Revision 0x10 do them in pairs */  in it821x_passthru_set_dmamode()
327 		if (itdev->timing10)  in it821x_passthru_set_dmamode()
337  *	it821x_passthru_bmdma_start	-	DMA start callback
347 	struct ata_port *ap = qc->ap;  in it821x_passthru_bmdma_start()
348 	struct ata_device *adev = qc->dev;  in it821x_passthru_bmdma_start()
349 	struct it821x_dev *itdev = ap->private_data;  in it821x_passthru_bmdma_start()
350 	int unit = adev->devno;  in it821x_passthru_bmdma_start()
352 	if (itdev->mwdma[unit] != MWDMA_OFF)  in it821x_passthru_bmdma_start()
353 		it821x_program(ap, adev, itdev->mwdma[unit]);  in it821x_passthru_bmdma_start()
354 	else if (itdev->udma[unit] != UDMA_OFF && itdev->timing10)  in it821x_passthru_bmdma_start()
355 		it821x_program_udma(ap, adev, itdev->udma[unit]);  in it821x_passthru_bmdma_start()
360  *	it821x_passthru_bmdma_stop	-	DMA stop callback
370 	struct ata_port *ap = qc->ap;  in it821x_passthru_bmdma_stop()
371 	struct ata_device *adev = qc->dev;  in it821x_passthru_bmdma_stop()
372 	struct it821x_dev *itdev = ap->private_data;  in it821x_passthru_bmdma_stop()
373 	int unit = adev->devno;  in it821x_passthru_bmdma_stop()
376 	if (itdev->mwdma[unit] != MWDMA_OFF)  in it821x_passthru_bmdma_stop()
377 		it821x_program(ap, adev, itdev->pio[unit]);  in it821x_passthru_bmdma_stop()
382  *	it821x_passthru_dev_select	-	Select master/slave
392 	struct it821x_dev *itdev = ap->private_data;  in it821x_passthru_dev_select()
393 	if (itdev && device != itdev->last_device) {  in it821x_passthru_dev_select()
394 		struct ata_device *adev = &ap->link.device[device];  in it821x_passthru_dev_select()
395 		it821x_program(ap, adev, itdev->pio[adev->devno]);  in it821x_passthru_dev_select()
396 		itdev->last_device = device;  in it821x_passthru_dev_select()
402  *	it821x_smart_qc_issue		-	wrap qc issue prot
412 	switch(qc->tf.command)  in it821x_smart_qc_issue()
430 		/* Arguably should just no-op this one */  in it821x_smart_qc_issue()
434 	ata_dev_dbg(qc->dev, "it821x: can't process command 0x%02X\n",  in it821x_smart_qc_issue()
435 		    qc->tf.command);  in it821x_smart_qc_issue()
440  *	it821x_passthru_qc_issue	-	wrap qc issue prot
450 	it821x_passthru_dev_select(qc->ap, qc->dev->devno);  in it821x_passthru_qc_issue()
455  *	it821x_smart_set_mode	-	mode setting
471 		dev->pio_mode = XFER_PIO_0;  in it821x_smart_set_mode()
472 		dev->dma_mode = XFER_MW_DMA_0;  in it821x_smart_set_mode()
475 		if (ata_id_has_dma(dev->id)) {  in it821x_smart_set_mode()
477 			dev->xfer_mode = XFER_MW_DMA_0;  in it821x_smart_set_mode()
478 			dev->xfer_shift = ATA_SHIFT_MWDMA;  in it821x_smart_set_mode()
479 			dev->flags &= ~ATA_DFLAG_PIO;  in it821x_smart_set_mode()
482 			dev->xfer_mode = XFER_PIO_0;  in it821x_smart_set_mode()
483 			dev->xfer_shift = ATA_SHIFT_PIO;  in it821x_smart_set_mode()
484 			dev->flags |= ATA_DFLAG_PIO;  in it821x_smart_set_mode()
491  *	it821x_dev_config	-	Called each device identify
504 	ata_id_c_string(adev->id, model_num, ATA_ID_PROD, sizeof(model_num));  in it821x_dev_config()
506 	if (adev->max_sectors > 255)  in it821x_dev_config()
507 		adev->max_sectors = 255;  in it821x_dev_config()
511 		if (adev->id[129] == 1)  in it821x_dev_config()
513 				     adev->id[147] ? "Bootable " : "",  in it821x_dev_config()
514 				     adev->id[129]);  in it821x_dev_config()
517 				     adev->id[147] ? "Bootable " : "",  in it821x_dev_config()
518 				     adev->id[129], adev->id[146]);  in it821x_dev_config()
522 	adev->quirks &= ~ATA_QUIRK_DIAGNOSTIC;  in it821x_dev_config()
524 	adev->quirks |= ATA_QUIRK_BROKEN_HPA;  in it821x_dev_config()
528  *	it821x_read_id	-	Hack identify data up
570  *	it821x_check_atapi_dma	-	ATAPI DMA handler
579 	struct ata_port *ap = qc->ap;  in it821x_check_atapi_dma()
580 	struct it821x_dev *itdev = ap->private_data;  in it821x_check_atapi_dma()
584 		return -EOPNOTSUPP;  in it821x_check_atapi_dma()
587 	if (itdev->smart)  in it821x_check_atapi_dma()
588 		return -EOPNOTSUPP;  in it821x_check_atapi_dma()
590 	if (itdev->timing10)  in it821x_check_atapi_dma()
591 		return -EOPNOTSUPP;  in it821x_check_atapi_dma()
597  *	it821x_display_disk	-	display disk setup
612 	const char *cbl = "(40 wire cable)";  in it821x_display_disk()
635 		snprintf(mbuf, 8, "%5s%d", mtype, mode - 1);  in it821x_display_disk()
639 		ata_port_info(ap, "%d: %-6s %-8s          %s %s\n",  in it821x_display_disk()
642 		ata_port_info(ap, "%d: %-6s %-8s Volume: %1d %s %s\n",  in it821x_display_disk()
649  *	it821x_firmware_command		-	issue firmware command
670 	ap->ctl |= ATA_NIEN;  in it821x_firmware_command()
671 	iowrite8(ap->ctl, ap->ioaddr.ctl_addr);  in it821x_firmware_command()
673 	iowrite8(ATA_DEVICE_OBS, ap->ioaddr.device_addr);  in it821x_firmware_command()
674 	iowrite8(cmd, ap->ioaddr.command_addr);  in it821x_firmware_command()
679 		status = ioread8(ap->ioaddr.status_addr);  in it821x_firmware_command()
686 			ioread16_rep(ap->ioaddr.data_addr, buf, len/2);  in it821x_firmware_command()
697  *	it821x_probe_firmware	-	firmware reporting/setup
729  *	it821x_port_start	-	port setup
740 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_port_start()
748 	itdev = devm_kzalloc(&pdev->dev, sizeof(struct it821x_dev), GFP_KERNEL);  in it821x_port_start()
750 		return -ENOMEM;  in it821x_port_start()
751 	ap->private_data = itdev;  in it821x_port_start()
756 		itdev->smart = 1;  in it821x_port_start()
760 		if (ap->port_no == 0)  in it821x_port_start()
764 	if (conf & (1 << (1 + ap->port_no)))  in it821x_port_start()
765 		itdev->clock_mode = ATA_50;  in it821x_port_start()
767 		itdev->clock_mode = ATA_66;  in it821x_port_start()
769 	itdev->want[0][1] = ATA_ANY;  in it821x_port_start()
770 	itdev->want[1][1] = ATA_ANY;  in it821x_port_start()
771 	itdev->last_device = -1;  in it821x_port_start()
773 	if (pdev->revision == 0x10) {  in it821x_port_start()
774 		itdev->timing10 = 1;  in it821x_port_start()
776 		if (!itdev->smart)  in it821x_port_start()
777 			dev_warn(&pdev->dev,  in it821x_port_start()
785  *	it821x_rdc_cable	-	Cable detect for RDC1010
795 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in it821x_rdc_cable()
798 	if (r40 & (1 << (2 + ap->port_no)))  in it821x_rdc_cable()
856 	if (pdev->vendor != PCI_VENDOR_ID_ITE ||  in it821x_disable_raid()
857 			pdev->device != PCI_DEVICE_ID_ITE_8212)  in it821x_disable_raid()
917 	if (pdev->vendor == PCI_VENDOR_ID_RDC) {  in it821x_init_one()
919 		if (pdev->revision == 0x11)  in it821x_init_one()
926 			dev_info(&pdev->dev, "forcing bypass mode.\n");  in it821x_init_one()
932 		dev_info(&pdev->dev, "controller in %s mode.\n", mode[conf]);  in it821x_init_one()
951 	/* Resume - turn raid back off if need be */  in it821x_reinit_one()
981 MODULE_DESCRIPTION("low-level driver for the IT8211/IT8212 IDE RAID controller");