2  *  Copyright (C) 1998-1999 Andrzej Krzysztofowicz, Author and Maintainer
3  *  Copyright (C) 1998-2000 Andre Hedrick <andre@linux-ide.org>
4  *  Copyright (C) 2003 Red Hat
5  *  Copyright (C) 2006-2007 MontaVista Software, Inc. <source@mvista.com>
19  *	PIIX4    errata #9	- Only on ultra obscure hw
20  *	ICH3	 errata #13     - Not observed to affect real hw
24  *	PIIX4	errata #10	- BM IDE hang with non UDMA
26  *	440MX   errata #15	- As PIIX4 errata #10
27  *	PIIX4	errata #15	- Must not read control registers
29  *	440MX   errata #13	- As PIIX4 errata #15
30  *	ICH2	errata #21	- DMA mode 0 doesn't work right
31  *	ICH0/1  errata #55	- As ICH2 errata #21
32  *	ICH2	spec c #9	- Extra operations needed to handle
34  *	ICH2    spec c #20	- IDE PRD must not cross a 64K boundary
36  *	ICH2    spec c #24	- UDMA mode 4,5 t85/86 should be 6ns not 3.3
39  *	450NX:	errata #19	- DMA hangs on old 450NX
40  *	450NX:  errata #20	- DMA hangs on old 450NX
41  *	450NX:  errata #25	- Corruption with DMA on old 450NX
42  *	ICH3    errata #15      - IDE deadlock under high load
44  *	ICH3	errata #18	- Don't use native mode
61  *	piix_set_pio_mode	-	set host controller for PIO mode
70 	struct pci_dev *dev	= to_pci_dev(hwif->dev);  in piix_set_pio_mode()
71 	int is_slave		= drive->dn & 1;  in piix_set_pio_mode()
72 	int master_port		= hwif->channel ? 0x42 : 0x40;  in piix_set_pio_mode()
79 	const u8 pio = drive->pio_mode - XFER_PIO_0;  in piix_set_pio_mode()
99 	if (drive->media == ide_disk)  in piix_set_pio_mode()
111 		slave_data &= hwif->channel ? 0x0f : 0xf0;  in piix_set_pio_mode()
113 			       (hwif->channel ? 4 : 0);  in piix_set_pio_mode()
129  *	piix_set_dma_mode	-	set host controller for DMA mode
139 	struct pci_dev *dev	= to_pci_dev(hwif->dev);  in piix_set_dma_mode()
140 	u8 maslave		= hwif->channel ? 0x42 : 0x40;  in piix_set_dma_mode()
141 	int a_speed		= 3 << (drive->dn * 4);  in piix_set_dma_mode()
142 	int u_flag		= 1 << drive->dn;  in piix_set_dma_mode()
143 	int v_flag		= 0x01 << drive->dn;  in piix_set_dma_mode()
144 	int w_flag		= 0x10 << drive->dn;  in piix_set_dma_mode()
149 	const u8 speed		= drive->dma_mode;  in piix_set_dma_mode()
159 		u8 udma = speed - XFER_UDMA_0;  in piix_set_dma_mode()  local
161 		u_speed = min_t(u8, 2 - (udma & 1), udma) << (drive->dn * 4);  in piix_set_dma_mode()
190 			drive->pio_mode =  in piix_set_dma_mode()
191 				mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;  in piix_set_dma_mode()
193 			drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */  in piix_set_dma_mode()
200  *	init_chipset_ich	-	set up the ICH chipset
218  *	ich_clear_irq	-	clear BMDMA status
227 	ide_hwif_t *hwif = drive->hwif;  in ich_clear_irq()
235 	if (drive->waiting_for_dma || hwif->dma_base == 0)  in ich_clear_irq()
239 	dma_stat = inb(hwif->dma_base + ATA_DMA_STATUS);  in ich_clear_irq()
241 	outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);  in ich_clear_irq()
261 	{ 0x27DF, 0x1071, 0xD221 },	/* ICH7 on Hercules EC-900 */
266 	{ 0x27df, 0x104d, 0x900e },	/* ICH7 on Sony TZ-90 */
273 	struct pci_dev *pdev = to_pci_dev(hwif->dev);  in piix_cable_detect()
275 	u8 reg54h = 0, mask = hwif->channel ? 0xc0 : 0x30;  in piix_cable_detect()
278 	while (lap->device) {  in piix_cable_detect()
279 		if (lap->device == pdev->device &&  in piix_cable_detect()
280 		    lap->subvendor == pdev->subsystem_vendor &&  in piix_cable_detect()
281 		    lap->subdevice == pdev->subsystem_device) {  in piix_cable_detect()
293  *	init_hwif_piix		-	fill in the hwif for the PIIX
302 	if (!hwif->dma_base)  in init_hwif_piix()
306 		hwif->ultra_mask = hwif->mwdma_mask = hwif->swdma_mask = 0;  in init_hwif_piix()
322 #define DECLARE_PIIX_DEV(udma) \  argument
331 		.udma_mask	= udma,			\
334 #define DECLARE_ICH_DEV(mwdma, udma) \  argument
344 		.udma_mask	= udma, \
361 	DECLARE_PIIX_DEV(0x00), /* no udma */
370 	/* 6: ICH[2-6]/ICH[2-3]M/C-ICH/ICH5-SATA/ESB2/ICH8M */
372 	/* 7: ICH7/7-R, no MWDMA1 */
377  *	piix_init_one	-	called when a PIIX is found
387 	return ide_pci_init_one(dev, &piix_pci_info[id->driver_data], NULL);  in piix_init_one()
391  *	piix_check_450nx	-	Check for problem 450NX setup
407 		if (pdev->revision == 0x00)  in piix_check_450nx()
410 		else if (cfg & (1<<14) && pdev->revision < 5)  in piix_check_450nx()