2 * pata_atiixp.c - ATI PATA for new ATA layer
4 * Alan Cox <alan@redhat.com>
8 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
10 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
11 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
15 #include <linux/kernel.h>
16 #include <linux/module.h>
17 #include <linux/pci.h>
18 #include <linux/init.h>
19 #include <linux/blkdev.h>
20 #include <linux/delay.h>
21 #include <scsi/scsi_host.h>
22 #include <linux/libata.h>
24 #define DRV_NAME "pata_atiixp"
25 #define DRV_VERSION "0.4.6"
28 ATIIXP_IDE_PIO_TIMING = 0x40,
29 ATIIXP_IDE_MWDMA_TIMING = 0x44,
30 ATIIXP_IDE_PIO_CONTROL = 0x48,
31 ATIIXP_IDE_PIO_MODE = 0x4a,
32 ATIIXP_IDE_UDMA_CONTROL = 0x54,
33 ATIIXP_IDE_UDMA_MODE = 0x56
36 static int atiixp_pre_reset(struct ata_link *link, unsigned long deadline)
38 struct ata_port *ap = link->ap;
39 static const struct pci_bits atiixp_enable_bits[] = {
40 { 0x48, 1, 0x01, 0x00 },
41 { 0x48, 1, 0x08, 0x00 }
43 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
45 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
48 return ata_sff_prereset(link, deadline);
51 static int atiixp_cable_detect(struct ata_port *ap)
53 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
56 /* Hack from drivers/ide/pci. Really we want to know how to do the
57 raw detection not play follow the bios mode guess */
58 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
59 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
60 return ATA_CBL_PATA80;
61 return ATA_CBL_PATA40;
65 * atiixp_set_pio_timing - set initial PIO mode data
69 * Called by both the pio and dma setup functions to set the controller
70 * timings for PIO transfers. We must load both the mode number and
71 * timing values into the controller.
74 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
76 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
78 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
79 int dn = 2 * ap->port_no + adev->devno;
81 /* Check this is correct - the order is odd in both drivers */
82 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
83 u16 pio_mode_data, pio_timing_data;
85 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
86 pio_mode_data &= ~(0x7 << (4 * dn));
87 pio_mode_data |= pio << (4 * dn);
88 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
90 pci_read_config_word(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
91 pio_mode_data &= ~(0xFF << timing_shift);
92 pio_mode_data |= (pio_timings[pio] << timing_shift);
93 pci_write_config_word(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
97 * atiixp_set_piomode - set initial PIO mode data
101 * Called to do the PIO mode setup. We use a shared helper for this
102 * as the DMA setup must also adjust the PIO timing information.
105 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
107 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
111 * atiixp_set_dmamode - set initial DMA mode data
115 * Called to do the DMA mode setup. We use timing tables for most
116 * modes but must tune an appropriate PIO mode to match.
119 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
121 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
123 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
124 int dma = adev->dma_mode;
125 int dn = 2 * ap->port_no + adev->devno;
128 if (adev->dma_mode >= XFER_UDMA_0) {
133 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
134 udma_mode_data &= ~(0x7 << (4 * dn));
135 udma_mode_data |= dma << (4 * dn);
136 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
138 u16 mwdma_timing_data;
139 /* Check this is correct - the order is odd in both drivers */
140 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
142 dma -= XFER_MW_DMA_0;
144 pci_read_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, &mwdma_timing_data);
145 mwdma_timing_data &= ~(0xFF << timing_shift);
146 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
147 pci_write_config_word(pdev, ATIIXP_IDE_MWDMA_TIMING, mwdma_timing_data);
150 * We must now look at the PIO mode situation. We may need to
151 * adjust the PIO mode to keep the timings acceptable
153 if (adev->dma_mode >= XFER_MW_DMA_2)
155 else if (adev->dma_mode == XFER_MW_DMA_1)
157 else if (adev->dma_mode == XFER_MW_DMA_0)
161 if (adev->pio_mode != wanted_pio)
162 atiixp_set_pio_timing(ap, adev, wanted_pio);
166 * atiixp_bmdma_start - DMA start callback
167 * @qc: Command in progress
169 * When DMA begins we need to ensure that the UDMA control
170 * register for the channel is correctly set.
172 * Note: The host lock held by the libata layer protects
173 * us from two channels both trying to set DMA bits at once
176 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
178 struct ata_port *ap = qc->ap;
179 struct ata_device *adev = qc->dev;
181 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
182 int dn = (2 * ap->port_no) + adev->devno;
185 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
186 if (adev->dma_mode >= XFER_UDMA_0)
190 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
195 * atiixp_dma_stop - DMA stop callback
196 * @qc: Command in progress
198 * DMA has completed. Clear the UDMA flag as the next operations will
199 * be PIO ones not UDMA data transfer.
201 * Note: The host lock held by the libata layer protects
202 * us from two channels both trying to set DMA bits at once
205 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
207 struct ata_port *ap = qc->ap;
208 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
209 int dn = (2 * ap->port_no) + qc->dev->devno;
212 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
214 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
218 static struct scsi_host_template atiixp_sht = {
219 ATA_BMDMA_SHT(DRV_NAME),
220 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
223 static struct ata_port_operations atiixp_port_ops = {
224 .inherits = &ata_bmdma_port_ops,
226 .qc_prep = ata_sff_dumb_qc_prep,
227 .bmdma_start = atiixp_bmdma_start,
228 .bmdma_stop = atiixp_bmdma_stop,
230 .cable_detect = atiixp_cable_detect,
231 .set_piomode = atiixp_set_piomode,
232 .set_dmamode = atiixp_set_dmamode,
233 .prereset = atiixp_pre_reset,
236 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
238 static const struct ata_port_info info = {
239 .flags = ATA_FLAG_SLAVE_POSS,
241 .mwdma_mask = 0x06, /* No MWDMA0 support */
243 .port_ops = &atiixp_port_ops
245 const struct ata_port_info *ppi[] = { &info, NULL };
246 return ata_pci_sff_init_one(dev, ppi, &atiixp_sht, NULL);
249 static const struct pci_device_id atiixp[] = {
250 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
251 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
252 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
253 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
254 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
259 static struct pci_driver atiixp_pci_driver = {
262 .probe = atiixp_init_one,
263 .remove = ata_pci_remove_one,
265 .resume = ata_pci_device_resume,
266 .suspend = ata_pci_device_suspend,
270 static int __init atiixp_init(void)
272 return pci_register_driver(&atiixp_pci_driver);
276 static void __exit atiixp_exit(void)
278 pci_unregister_driver(&atiixp_pci_driver);
281 MODULE_AUTHOR("Alan Cox");
282 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
283 MODULE_LICENSE("GPL");
284 MODULE_DEVICE_TABLE(pci, atiixp);
285 MODULE_VERSION(DRV_VERSION);
287 module_init(atiixp_init);
288 module_exit(atiixp_exit);