2 * pata_atiixp.c - ATI PATA for new ATA layer
4 * (C) 2009-2010 Bartlomiej Zolnierkiewicz
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>
23 #include <linux/dmi.h>
25 #define DRV_NAME "pata_atiixp"
26 #define DRV_VERSION "0.4.6"
29 ATIIXP_IDE_PIO_TIMING = 0x40,
30 ATIIXP_IDE_MWDMA_TIMING = 0x44,
31 ATIIXP_IDE_PIO_CONTROL = 0x48,
32 ATIIXP_IDE_PIO_MODE = 0x4a,
33 ATIIXP_IDE_UDMA_CONTROL = 0x54,
34 ATIIXP_IDE_UDMA_MODE = 0x56
37 static const struct dmi_system_id attixp_cable_override_dmi_table[] = {
39 /* Board has onboard PATA<->SATA converters */
40 .ident = "MSI E350DM-E33",
42 DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
43 DMI_MATCH(DMI_BOARD_NAME, "E350DM-E33(MS-7720)"),
49 static int atiixp_cable_detect(struct ata_port *ap)
51 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
54 if (dmi_check_system(attixp_cable_override_dmi_table))
55 return ATA_CBL_PATA40_SHORT;
57 /* Hack from drivers/ide/pci. Really we want to know how to do the
58 raw detection not play follow the bios mode guess */
59 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
60 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
61 return ATA_CBL_PATA80;
62 return ATA_CBL_PATA40;
65 static DEFINE_SPINLOCK(atiixp_lock);
68 * atiixp_prereset - perform reset handling
70 * @deadline: deadline jiffies for the operation
72 * Reset sequence checking enable bits to see which ports are
76 static int atiixp_prereset(struct ata_link *link, unsigned long deadline)
78 static const struct pci_bits atiixp_enable_bits[] = {
79 { 0x48, 1, 0x01, 0x00 },
80 { 0x48, 1, 0x08, 0x00 }
83 struct ata_port *ap = link->ap;
84 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
86 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
89 return ata_sff_prereset(link, deadline);
93 * atiixp_set_pio_timing - set initial PIO mode data
97 * Called by both the pio and dma setup functions to set the controller
98 * timings for PIO transfers. We must load both the mode number and
99 * timing values into the controller.
102 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
104 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
106 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
107 int dn = 2 * ap->port_no + adev->devno;
108 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
112 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
113 pio_mode_data &= ~(0x7 << (4 * dn));
114 pio_mode_data |= pio << (4 * dn);
115 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
117 pci_read_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
118 pio_timing_data &= ~(0xFF << timing_shift);
119 pio_timing_data |= (pio_timings[pio] << timing_shift);
120 pci_write_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
124 * atiixp_set_piomode - set initial PIO mode data
128 * Called to do the PIO mode setup. We use a shared helper for this
129 * as the DMA setup must also adjust the PIO timing information.
132 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
135 spin_lock_irqsave(&atiixp_lock, flags);
136 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
137 spin_unlock_irqrestore(&atiixp_lock, flags);
141 * atiixp_set_dmamode - set initial DMA mode data
145 * Called to do the DMA mode setup. We use timing tables for most
146 * modes but must tune an appropriate PIO mode to match.
149 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
151 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
153 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
154 int dma = adev->dma_mode;
155 int dn = 2 * ap->port_no + adev->devno;
159 spin_lock_irqsave(&atiixp_lock, flags);
161 if (adev->dma_mode >= XFER_UDMA_0) {
166 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
167 udma_mode_data &= ~(0x7 << (4 * dn));
168 udma_mode_data |= dma << (4 * dn);
169 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
171 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
172 u32 mwdma_timing_data;
174 dma -= XFER_MW_DMA_0;
176 pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
178 mwdma_timing_data &= ~(0xFF << timing_shift);
179 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
180 pci_write_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
184 * We must now look at the PIO mode situation. We may need to
185 * adjust the PIO mode to keep the timings acceptable
187 if (adev->dma_mode >= XFER_MW_DMA_2)
189 else if (adev->dma_mode == XFER_MW_DMA_1)
191 else if (adev->dma_mode == XFER_MW_DMA_0)
195 if (adev->pio_mode != wanted_pio)
196 atiixp_set_pio_timing(ap, adev, wanted_pio);
197 spin_unlock_irqrestore(&atiixp_lock, flags);
201 * atiixp_bmdma_start - DMA start callback
202 * @qc: Command in progress
204 * When DMA begins we need to ensure that the UDMA control
205 * register for the channel is correctly set.
207 * Note: The host lock held by the libata layer protects
208 * us from two channels both trying to set DMA bits at once
211 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
213 struct ata_port *ap = qc->ap;
214 struct ata_device *adev = qc->dev;
216 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
217 int dn = (2 * ap->port_no) + adev->devno;
220 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
221 if (ata_using_udma(adev))
225 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
230 * atiixp_dma_stop - DMA stop callback
231 * @qc: Command in progress
233 * DMA has completed. Clear the UDMA flag as the next operations will
234 * be PIO ones not UDMA data transfer.
236 * Note: The host lock held by the libata layer protects
237 * us from two channels both trying to set DMA bits at once
240 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
242 struct ata_port *ap = qc->ap;
243 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
244 int dn = (2 * ap->port_no) + qc->dev->devno;
247 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
249 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
253 static struct scsi_host_template atiixp_sht = {
254 ATA_BMDMA_SHT(DRV_NAME),
255 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
258 static struct ata_port_operations atiixp_port_ops = {
259 .inherits = &ata_bmdma_port_ops,
261 .qc_prep = ata_bmdma_dumb_qc_prep,
262 .bmdma_start = atiixp_bmdma_start,
263 .bmdma_stop = atiixp_bmdma_stop,
265 .prereset = atiixp_prereset,
266 .cable_detect = atiixp_cable_detect,
267 .set_piomode = atiixp_set_piomode,
268 .set_dmamode = atiixp_set_dmamode,
271 static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
273 static const struct ata_port_info info = {
274 .flags = ATA_FLAG_SLAVE_POSS,
275 .pio_mask = ATA_PIO4,
276 .mwdma_mask = ATA_MWDMA12_ONLY,
277 .udma_mask = ATA_UDMA5,
278 .port_ops = &atiixp_port_ops
280 const struct ata_port_info *ppi[] = { &info, &info };
282 return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
283 ATA_HOST_PARALLEL_SCAN);
286 static const struct pci_device_id atiixp[] = {
287 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
288 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
289 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
290 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
291 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
292 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), },
297 static struct pci_driver atiixp_pci_driver = {
300 .probe = atiixp_init_one,
301 .remove = ata_pci_remove_one,
303 .resume = ata_pci_device_resume,
304 .suspend = ata_pci_device_suspend,
308 module_pci_driver(atiixp_pci_driver);
310 MODULE_AUTHOR("Alan Cox");
311 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
312 MODULE_LICENSE("GPL");
313 MODULE_DEVICE_TABLE(pci, atiixp);
314 MODULE_VERSION(DRV_VERSION);