1 // SPDX-License-Identifier: GPL-2.0-only
3  * pata_amd.c 	- AMD PATA for new ATA layer
4  *			  (C) 2005-2006 Red Hat Inc
6  *  Based on pata-sil680. Errata information is taken from data sheets
7  *  and the amd74xx.c driver by Vojtech Pavlik. Nvidia SATA devices are
8  *  claimed by sata-nv.c.
30  *	timing_setup		-	shared timing computation and load
49 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in timing_setup()
51 	int dn = ap->port_no * 2 + adev->devno;  in timing_setup()
63 		dev_err(&pdev->dev, "unknown mode %d\n", speed);  in timing_setup()
69 		if (peer->dma_mode) {  in timing_setup()
70 			ata_timing_compute(peer, peer->dma_mode, &apeer, T, UT);  in timing_setup()
73 		ata_timing_compute(peer, peer->pio_mode, &apeer, T, UT);  in timing_setup()
77 	if (speed == XFER_UDMA_5 && amd_clock <= 33333) at.udma = 1;  in timing_setup()
78 	if (speed == XFER_UDMA_6 && amd_clock <= 33333) at.udma = 15;  in timing_setup()
86 	t = (t & ~(3 << ((3 - dn) << 1))) | ((clamp_val(at.setup, 1, 4) - 1) << ((3 - dn) << 1));  in timing_setup()
90 	pci_write_config_byte(pdev, offset + 0x0E + (1 - (dn >> 1)),  in timing_setup()
91 		((clamp_val(at.act8b, 1, 16) - 1) << 4) | (clamp_val(at.rec8b, 1, 16) - 1));  in timing_setup()
94 	pci_write_config_byte(pdev, offset + 0x08 + (3 - dn),  in timing_setup()
95 		((clamp_val(at.active, 1, 16) - 1) << 4) | (clamp_val(at.recover, 1, 16) - 1));  in timing_setup()
99 		t = at.udma ? (0xc0 | (clamp_val(at.udma, 2, 5) - 2)) : 0x03;  in timing_setup()
103 		t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 2, 10)]) : 0x03;  in timing_setup()
107 		t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 1, 10)]) : 0x03;  in timing_setup()
111 		t = at.udma ? (0xc0 | amd_cyc2udma[clamp_val(at.udma, 1, 15)]) : 0x03;  in timing_setup()
118 	/* UDMA timing */  in timing_setup()
119 	if (at.udma)  in timing_setup()
120 		pci_write_config_byte(pdev, offset + 0x10 + (3 - dn), t);  in timing_setup()
124  *	amd_pre_reset		-	perform reset handling
139 	struct ata_port *ap = link->ap;  in amd_pre_reset()
140 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in amd_pre_reset()
142 	if (!pci_test_config_bits(pdev, &amd_enable_bits[ap->port_no]))  in amd_pre_reset()
143 		return -ENOENT;  in amd_pre_reset()
149  *	amd_cable_detect	-	report cable type
158 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in amd_cable_detect()
162 	if (ata66 & bitmask[ap->port_no])  in amd_cable_detect()
168  *	amd_fifo_setup		-	set the PIO FIFO for ATA/ATAPI
181 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in amd_fifo_setup()
183 	u8 fifo = fifobit[ap->port_no];  in amd_fifo_setup()
187 	ata_for_each_dev(adev, &ap->link, ENABLED) {  in amd_fifo_setup()
188 		if (adev->class == ATA_DEV_ATAPI)  in amd_fifo_setup()
191 	if (pdev->device == PCI_DEVICE_ID_AMD_VIPER_7411) /* FIFO is broken */  in amd_fifo_setup()
194 	/* On the later chips the read prefetch bits become no-op bits */  in amd_fifo_setup()
196 	r &= ~fifobit[ap->port_no];  in amd_fifo_setup()
202  *	amd33_set_piomode	-	set initial PIO mode data
212 	timing_setup(ap, adev, 0x40, adev->pio_mode, 1);  in amd33_set_piomode()
218 	timing_setup(ap, adev, 0x40, adev->pio_mode, 2);  in amd66_set_piomode()
224 	timing_setup(ap, adev, 0x40, adev->pio_mode, 3);  in amd100_set_piomode()
230 	timing_setup(ap, adev, 0x40, adev->pio_mode, 4);  in amd133_set_piomode()
234  *	amd33_set_dmamode	-	set initial DMA mode data
238  *	Program the MWDMA/UDMA modes for the AMD and Nvidia
244 	timing_setup(ap, adev, 0x40, adev->dma_mode, 1);  in amd33_set_dmamode()
249 	timing_setup(ap, adev, 0x40, adev->dma_mode, 2);  in amd66_set_dmamode()
254 	timing_setup(ap, adev, 0x40, adev->dma_mode, 3);  in amd100_set_dmamode()
259 	timing_setup(ap, adev, 0x40, adev->dma_mode, 4);  in amd133_set_dmamode()
262 /* Both host-side and drive-side detection results are worthless on NV
274 	struct ata_port *ap = dev->link->ap;  in nv_mode_filter()
276 	u32 saved_udma, udma;  in nv_mode_filter()  local
281 	udma = saved_udma = (unsigned long)ap->host->private_data;  in nv_mode_filter()
283 	if (ap->port_no == 0)  in nv_mode_filter()
284 		udma >>= 16;  in nv_mode_filter()
285 	if (dev->devno == 0)  in nv_mode_filter()
286 		udma >>= 8;  in nv_mode_filter()
288 	if ((udma & 0xc0) == 0xc0)  in nv_mode_filter()
289 		bios_limit = ata_pack_xfermask(0, 0, udma_mask_map[udma & 0x7]);  in nv_mode_filter()
297 			 gtm->drive[0].dma, gtm->drive[1].dma, gtm->flags);  in nv_mode_filter()
314 	ata_port_dbg(ap, "nv_mode_filter: 0x%lx&0x%lx->0x%lx, "  in nv_mode_filter()
323  *	nv_probe_init	-	cable detection
337 	struct ata_port *ap = link->ap;  in nv_pre_reset()
338 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);  in nv_pre_reset()
340 	if (!pci_test_config_bits(pdev, &nv_enable_bits[ap->port_no]))  in nv_pre_reset()
341 		return -ENOENT;  in nv_pre_reset()
347  *	nv100_set_piomode	-	set initial PIO mode data
356 	timing_setup(ap, adev, 0x50, adev->pio_mode, 3);  in nv100_set_piomode()
361 	timing_setup(ap, adev, 0x50, adev->pio_mode, 4);  in nv133_set_piomode()
365  *	nv100_set_dmamode	-	set initial DMA mode data
369  *	Program the MWDMA/UDMA modes for the AMD and Nvidia
375 	timing_setup(ap, adev, 0x50, adev->dma_mode, 3);  in nv100_set_dmamode()
380 	timing_setup(ap, adev, 0x50, adev->dma_mode, 4);  in nv133_set_dmamode()
385 	u32 udma = (unsigned long)host->private_data;  in nv_host_stop()  local
388 	pci_write_config_dword(to_pci_dev(host->dev), 0x60, udma);  in nv_host_stop()
451 	/* Disable the FIFO, the FIFO logic will re-enable it as  in amd_clear_fifo()
461 		{	/* 0: AMD 7401 - no swdma */  in amd_init_one()
468 		{	/* 1: Early AMD7409 - no swdma */  in amd_init_one()
496 		{	/* 5: AMD 8111 - no swdma */  in amd_init_one()
503 		{	/* 6: AMD 8111 UDMA 100 (Serenade) - no swdma */  in amd_init_one()
517 		{	/* 8: Nvidia Nforce2 and later - no swdma */  in amd_init_one()
533 	int type = id->driver_data;  in amd_init_one()
538 	ata_print_version_once(&pdev->dev, DRV_VERSION);  in amd_init_one()
547 	if (type == 1 && pdev->revision > 0x7)  in amd_init_one()
551 	if (type == 5 && pdev->subsystem_vendor == PCI_VENDOR_ID_AMD &&  in amd_init_one()
552 			 pdev->subsystem_device == PCI_DEVICE_ID_AMD_SERENADE)  in amd_init_one()
553 		type = 6;	/* UDMA 100 only */  in amd_init_one()
556 	 * Okay, type is determined now.  Apply type-specific workarounds.  in amd_init_one()
562 	if (pdev->vendor == PCI_VENDOR_ID_AMD)  in amd_init_one()
565 	 * cache BIOS programmed UDMA mode.  in amd_init_one()
568 		u32 udma;  in amd_init_one()  local
570 		pci_read_config_dword(pdev, 0x60, &udma);  in amd_init_one()
571 		hpriv = (void *)(unsigned long)udma;  in amd_init_one()
588 	if (pdev->vendor == PCI_VENDOR_ID_AMD) {  in amd_reinit_one()
590 		if (pdev->device == PCI_DEVICE_ID_AMD_VIPER_7409 ||  in amd_reinit_one()
591 		    pdev->device == PCI_DEVICE_ID_AMD_COBRA_7401)  in amd_reinit_one()
639 MODULE_DESCRIPTION("low-level driver for AMD and Nvidia PATA IDE");