blob: 43755616dc5ac619ecfd873ce0e5f48b99c2ba17 [file] [log] [blame]
Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_atiixp.c - ATI PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +00004 * (C) 2009-2010 Bartlomiej Zolnierkiewicz
Jeff Garzik669a5db2006-08-29 18:12:40 -04005 *
6 * Based on
7 *
8 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
9 *
10 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
11 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
12 *
13 */
14
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
24#define DRV_NAME "pata_atiixp"
Jeff Garzik2a3103c2007-08-31 04:54:06 -040025#define DRV_VERSION "0.4.6"
Jeff Garzik669a5db2006-08-29 18:12:40 -040026
27enum {
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
34};
35
Alan Cox84708602007-03-08 19:27:31 +000036static int atiixp_cable_detect(struct ata_port *ap)
37{
38 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
39 u8 udma;
40
41 /* Hack from drivers/ide/pci. Really we want to know how to do the
42 raw detection not play follow the bios mode guess */
43 pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ap->port_no, &udma);
44 if ((udma & 0x07) >= 0x04 || (udma & 0x70) >= 0x40)
45 return ATA_CBL_PATA80;
46 return ATA_CBL_PATA40;
47}
48
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +000049static DEFINE_SPINLOCK(atiixp_lock);
50
Jeff Garzik669a5db2006-08-29 18:12:40 -040051/**
52 * atiixp_set_pio_timing - set initial PIO mode data
53 * @ap: ATA interface
54 * @adev: ATA device
55 *
56 * Called by both the pio and dma setup functions to set the controller
57 * timings for PIO transfers. We must load both the mode number and
58 * timing values into the controller.
59 */
60
61static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
62{
63 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
64
65 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
66 int dn = 2 * ap->port_no + adev->devno;
Jeff Garzik669a5db2006-08-29 18:12:40 -040067 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +020068 u32 pio_timing_data;
69 u16 pio_mode_data;
Jeff Garzik669a5db2006-08-29 18:12:40 -040070
71 pci_read_config_word(pdev, ATIIXP_IDE_PIO_MODE, &pio_mode_data);
72 pio_mode_data &= ~(0x7 << (4 * dn));
73 pio_mode_data |= pio << (4 * dn);
74 pci_write_config_word(pdev, ATIIXP_IDE_PIO_MODE, pio_mode_data);
75
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +020076 pci_read_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, &pio_timing_data);
Jeff Garzikd7b5a232008-04-29 17:39:45 -040077 pio_timing_data &= ~(0xFF << timing_shift);
78 pio_timing_data |= (pio_timings[pio] << timing_shift);
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +020079 pci_write_config_dword(pdev, ATIIXP_IDE_PIO_TIMING, pio_timing_data);
Jeff Garzik669a5db2006-08-29 18:12:40 -040080}
81
82/**
83 * atiixp_set_piomode - set initial PIO mode data
84 * @ap: ATA interface
85 * @adev: ATA device
86 *
87 * Called to do the PIO mode setup. We use a shared helper for this
88 * as the DMA setup must also adjust the PIO timing information.
89 */
90
91static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
92{
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +000093 unsigned long flags;
94 spin_lock_irqsave(&atiixp_lock, flags);
Jeff Garzik669a5db2006-08-29 18:12:40 -040095 atiixp_set_pio_timing(ap, adev, adev->pio_mode - XFER_PIO_0);
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +000096 spin_unlock_irqrestore(&atiixp_lock, flags);
Jeff Garzik669a5db2006-08-29 18:12:40 -040097}
98
99/**
100 * atiixp_set_dmamode - set initial DMA mode data
101 * @ap: ATA interface
102 * @adev: ATA device
103 *
104 * Called to do the DMA mode setup. We use timing tables for most
105 * modes but must tune an appropriate PIO mode to match.
106 */
107
108static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
109{
110 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
111
112 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
113 int dma = adev->dma_mode;
114 int dn = 2 * ap->port_no + adev->devno;
115 int wanted_pio;
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +0000116 unsigned long flags;
117
118 spin_lock_irqsave(&atiixp_lock, flags);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400119
120 if (adev->dma_mode >= XFER_UDMA_0) {
121 u16 udma_mode_data;
122
123 dma -= XFER_UDMA_0;
124
125 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_MODE, &udma_mode_data);
126 udma_mode_data &= ~(0x7 << (4 * dn));
127 udma_mode_data |= dma << (4 * dn);
128 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_MODE, udma_mode_data);
129 } else {
Jeff Garzik669a5db2006-08-29 18:12:40 -0400130 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +0200131 u32 mwdma_timing_data;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400132
133 dma -= XFER_MW_DMA_0;
134
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +0200135 pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
136 &mwdma_timing_data);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400137 mwdma_timing_data &= ~(0xFF << timing_shift);
138 mwdma_timing_data |= (mwdma_timings[dma] << timing_shift);
Bartlomiej Zolnierkiewicz1fd4bbe2009-08-06 17:47:05 +0200139 pci_write_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
140 mwdma_timing_data);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400141 }
142 /*
143 * We must now look at the PIO mode situation. We may need to
144 * adjust the PIO mode to keep the timings acceptable
145 */
146 if (adev->dma_mode >= XFER_MW_DMA_2)
147 wanted_pio = 4;
148 else if (adev->dma_mode == XFER_MW_DMA_1)
149 wanted_pio = 3;
150 else if (adev->dma_mode == XFER_MW_DMA_0)
151 wanted_pio = 0;
152 else BUG();
153
154 if (adev->pio_mode != wanted_pio)
155 atiixp_set_pio_timing(ap, adev, wanted_pio);
Bartlomiej Zolnierkiewicze99846f2010-02-17 13:17:31 +0000156 spin_unlock_irqrestore(&atiixp_lock, flags);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400157}
158
159/**
160 * atiixp_bmdma_start - DMA start callback
161 * @qc: Command in progress
162 *
163 * When DMA begins we need to ensure that the UDMA control
164 * register for the channel is correctly set.
Alan Cox21d2c922007-09-26 23:02:52 +0100165 *
166 * Note: The host lock held by the libata layer protects
167 * us from two channels both trying to set DMA bits at once
Jeff Garzik669a5db2006-08-29 18:12:40 -0400168 */
169
170static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
171{
172 struct ata_port *ap = qc->ap;
173 struct ata_device *adev = qc->dev;
174
175 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
176 int dn = (2 * ap->port_no) + adev->devno;
177 u16 tmp16;
178
179 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
Alan Coxb15b3eb2008-08-01 09:18:34 +0100180 if (ata_using_udma(adev))
Jeff Garzik669a5db2006-08-29 18:12:40 -0400181 tmp16 |= (1 << dn);
182 else
183 tmp16 &= ~(1 << dn);
184 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
185 ata_bmdma_start(qc);
186}
187
188/**
189 * atiixp_dma_stop - DMA stop callback
190 * @qc: Command in progress
191 *
192 * DMA has completed. Clear the UDMA flag as the next operations will
193 * be PIO ones not UDMA data transfer.
Alan Cox21d2c922007-09-26 23:02:52 +0100194 *
195 * Note: The host lock held by the libata layer protects
196 * us from two channels both trying to set DMA bits at once
Jeff Garzik669a5db2006-08-29 18:12:40 -0400197 */
198
199static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
200{
201 struct ata_port *ap = qc->ap;
202 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
203 int dn = (2 * ap->port_no) + qc->dev->devno;
204 u16 tmp16;
205
206 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
207 tmp16 &= ~(1 << dn);
208 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
209 ata_bmdma_stop(qc);
210}
211
212static struct scsi_host_template atiixp_sht = {
Tejun Heo68d1d072008-03-25 12:22:49 +0900213 ATA_BMDMA_SHT(DRV_NAME),
Alan Cox635adc22008-02-20 20:09:23 +0000214 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400215};
216
217static struct ata_port_operations atiixp_port_ops = {
Tejun Heo029cfd62008-03-25 12:22:49 +0900218 .inherits = &ata_bmdma_port_ops,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400219
Tejun Heof47451c2010-05-10 21:41:40 +0200220 .qc_prep = ata_bmdma_dumb_qc_prep,
Tejun Heo029cfd62008-03-25 12:22:49 +0900221 .bmdma_start = atiixp_bmdma_start,
222 .bmdma_stop = atiixp_bmdma_stop,
Jeff Garzikbda30282006-09-27 05:41:13 -0400223
Tejun Heo029cfd62008-03-25 12:22:49 +0900224 .cable_detect = atiixp_cable_detect,
225 .set_piomode = atiixp_set_piomode,
226 .set_dmamode = atiixp_set_dmamode,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400227};
228
Tejun Heo16028232009-01-16 15:27:27 +0900229static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
Jeff Garzik669a5db2006-08-29 18:12:40 -0400230{
Tejun Heo1626aeb2007-05-04 12:43:58 +0200231 static const struct ata_port_info info = {
Jeff Garzik1d2808f2007-05-28 06:59:48 -0400232 .flags = ATA_FLAG_SLAVE_POSS,
Erik Inge Bolsø14bdef92009-03-14 21:38:24 +0100233 .pio_mask = ATA_PIO4,
234 .mwdma_mask = ATA_MWDMA12_ONLY,
235 .udma_mask = ATA_UDMA5,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400236 .port_ops = &atiixp_port_ops
237 };
Tejun Heo16028232009-01-16 15:27:27 +0900238 static const struct pci_bits atiixp_enable_bits[] = {
239 { 0x48, 1, 0x01, 0x00 },
240 { 0x48, 1, 0x08, 0x00 }
241 };
242 const struct ata_port_info *ppi[] = { &info, &info };
243 int i;
244
245 for (i = 0; i < 2; i++)
246 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[i]))
247 ppi[i] = &ata_dummy_port_info;
248
Tejun Heo1c5afdf2010-05-19 22:10:22 +0200249 return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
250 ATA_HOST_PARALLEL_SCAN);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400251}
252
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400253static const struct pci_device_id atiixp[] = {
254 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
255 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
256 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
257 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
Jeff Garzik1ca972c2007-05-24 23:05:25 -0400258 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
Shane Huang5deab532009-10-13 11:14:00 +0800259 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), },
Jeff Garzik2d2744f2006-09-28 20:21:59 -0400260
261 { },
Jeff Garzik669a5db2006-08-29 18:12:40 -0400262};
263
264static struct pci_driver atiixp_pci_driver = {
265 .name = DRV_NAME,
266 .id_table = atiixp,
267 .probe = atiixp_init_one,
Alan30ced0f2006-11-22 16:57:36 +0000268 .remove = ata_pci_remove_one,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900269#ifdef CONFIG_PM
Alan30ced0f2006-11-22 16:57:36 +0000270 .resume = ata_pci_device_resume,
271 .suspend = ata_pci_device_suspend,
Tejun Heo438ac6d2007-03-02 17:31:26 +0900272#endif
Jeff Garzik669a5db2006-08-29 18:12:40 -0400273};
274
275static int __init atiixp_init(void)
276{
277 return pci_register_driver(&atiixp_pci_driver);
278}
279
280
281static void __exit atiixp_exit(void)
282{
283 pci_unregister_driver(&atiixp_pci_driver);
284}
285
Jeff Garzik669a5db2006-08-29 18:12:40 -0400286MODULE_AUTHOR("Alan Cox");
287MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
288MODULE_LICENSE("GPL");
289MODULE_DEVICE_TABLE(pci, atiixp);
290MODULE_VERSION(DRV_VERSION);
291
292module_init(atiixp_init);
293module_exit(atiixp_exit);