1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * pata_atiixp.c - ATI PATA for new ATA layer
4 * (C) 2005 Red Hat Inc
5 * (C) 2009-2010 Bartlomiej Zolnierkiewicz
6 *
7 * Based on
8 *
9 * linux/drivers/ide/pci/atiixp.c Version 0.01-bart2 Feb. 26, 2004
10 *
11 * Copyright (C) 2003 ATI Inc. <hyu@ati.com>
12 * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
13 *
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/module.h>
18 #include <linux/pci.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>
24
25 #define DRV_NAME "pata_atiixp"
26 #define DRV_VERSION "0.4.6"
27
28 enum {
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
35 };
36
37 static const struct dmi_system_id attixp_cable_override_dmi_table[] = {
38 {
39 /* Board has onboard PATA<->SATA converters */
40 .ident = "MSI E350DM-E33",
41 .matches = {
42 DMI_MATCH(DMI_BOARD_VENDOR, "MSI"),
43 DMI_MATCH(DMI_BOARD_NAME, "E350DM-E33(MS-7720)"),
44 },
45 },
46 { }
47 };
48
atiixp_cable_detect(struct ata_port * ap)49 static int atiixp_cable_detect(struct ata_port *ap)
50 {
51 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
52 u8 udma;
53
54 if (dmi_check_system(attixp_cable_override_dmi_table))
55 return ATA_CBL_PATA40_SHORT;
56
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;
63 }
64
65 static DEFINE_SPINLOCK(atiixp_lock);
66
67 /**
68 * atiixp_prereset - perform reset handling
69 * @link: ATA link
70 * @deadline: deadline jiffies for the operation
71 *
72 * Reset sequence checking enable bits to see which ports are
73 * active.
74 */
75
atiixp_prereset(struct ata_link * link,unsigned long deadline)76 static int atiixp_prereset(struct ata_link *link, unsigned long deadline)
77 {
78 static const struct pci_bits atiixp_enable_bits[] = {
79 { 0x48, 1, 0x01, 0x00 },
80 { 0x48, 1, 0x08, 0x00 }
81 };
82
83 struct ata_port *ap = link->ap;
84 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
85
86 if (!pci_test_config_bits(pdev, &atiixp_enable_bits[ap->port_no]))
87 return -ENOENT;
88
89 return ata_sff_prereset(link, deadline);
90 }
91
92 /**
93 * atiixp_set_pio_timing - set initial PIO mode data
94 * @ap: ATA interface
95 * @adev: ATA device
96 *
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.
100 */
101
atiixp_set_pio_timing(struct ata_port * ap,struct ata_device * adev,int pio)102 static void atiixp_set_pio_timing(struct ata_port *ap, struct ata_device *adev, int pio)
103 {
104 static u8 pio_timings[5] = { 0x5D, 0x47, 0x34, 0x22, 0x20 };
105
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);
109 u32 pio_timing_data;
110 u16 pio_mode_data;
111
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);
116
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);
121 }
122
123 /**
124 * atiixp_set_piomode - set initial PIO mode data
125 * @ap: ATA interface
126 * @adev: ATA device
127 *
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.
130 */
131
atiixp_set_piomode(struct ata_port * ap,struct ata_device * adev)132 static void atiixp_set_piomode(struct ata_port *ap, struct ata_device *adev)
133 {
134 unsigned long flags;
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);
138 }
139
140 /**
141 * atiixp_set_dmamode - set initial DMA mode data
142 * @ap: ATA interface
143 * @adev: ATA device
144 *
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.
147 */
148
atiixp_set_dmamode(struct ata_port * ap,struct ata_device * adev)149 static void atiixp_set_dmamode(struct ata_port *ap, struct ata_device *adev)
150 {
151 static u8 mwdma_timings[5] = { 0x77, 0x21, 0x20 };
152
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;
156 int wanted_pio;
157 unsigned long flags;
158
159 spin_lock_irqsave(&atiixp_lock, flags);
160
161 if (adev->dma_mode >= XFER_UDMA_0) {
162 u16 udma_mode_data;
163
164 dma -= XFER_UDMA_0;
165
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);
170 } else {
171 int timing_shift = (16 * ap->port_no) + 8 * (adev->devno ^ 1);
172 u32 mwdma_timing_data;
173
174 dma -= XFER_MW_DMA_0;
175
176 pci_read_config_dword(pdev, ATIIXP_IDE_MWDMA_TIMING,
177 &mwdma_timing_data);
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,
181 mwdma_timing_data);
182 }
183 /*
184 * We must now look at the PIO mode situation. We may need to
185 * adjust the PIO mode to keep the timings acceptable
186 */
187 if (adev->dma_mode >= XFER_MW_DMA_2)
188 wanted_pio = 4;
189 else if (adev->dma_mode == XFER_MW_DMA_1)
190 wanted_pio = 3;
191 else if (adev->dma_mode == XFER_MW_DMA_0)
192 wanted_pio = 0;
193 else BUG();
194
195 if (adev->pio_mode != wanted_pio)
196 atiixp_set_pio_timing(ap, adev, wanted_pio);
197 spin_unlock_irqrestore(&atiixp_lock, flags);
198 }
199
200 /**
201 * atiixp_bmdma_start - DMA start callback
202 * @qc: Command in progress
203 *
204 * When DMA begins we need to ensure that the UDMA control
205 * register for the channel is correctly set.
206 *
207 * Note: The host lock held by the libata layer protects
208 * us from two channels both trying to set DMA bits at once
209 */
210
atiixp_bmdma_start(struct ata_queued_cmd * qc)211 static void atiixp_bmdma_start(struct ata_queued_cmd *qc)
212 {
213 struct ata_port *ap = qc->ap;
214 struct ata_device *adev = qc->dev;
215
216 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
217 int dn = (2 * ap->port_no) + adev->devno;
218 u16 tmp16;
219
220 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
221 if (ata_using_udma(adev))
222 tmp16 |= (1 << dn);
223 else
224 tmp16 &= ~(1 << dn);
225 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
226 ata_bmdma_start(qc);
227 }
228
229 /**
230 * atiixp_dma_stop - DMA stop callback
231 * @qc: Command in progress
232 *
233 * DMA has completed. Clear the UDMA flag as the next operations will
234 * be PIO ones not UDMA data transfer.
235 *
236 * Note: The host lock held by the libata layer protects
237 * us from two channels both trying to set DMA bits at once
238 */
239
atiixp_bmdma_stop(struct ata_queued_cmd * qc)240 static void atiixp_bmdma_stop(struct ata_queued_cmd *qc)
241 {
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;
245 u16 tmp16;
246
247 pci_read_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, &tmp16);
248 tmp16 &= ~(1 << dn);
249 pci_write_config_word(pdev, ATIIXP_IDE_UDMA_CONTROL, tmp16);
250 ata_bmdma_stop(qc);
251 }
252
253 static struct scsi_host_template atiixp_sht = {
254 ATA_BMDMA_SHT(DRV_NAME),
255 .sg_tablesize = LIBATA_DUMB_MAX_PRD,
256 };
257
258 static struct ata_port_operations atiixp_port_ops = {
259 .inherits = &ata_bmdma_port_ops,
260
261 .qc_prep = ata_bmdma_dumb_qc_prep,
262 .bmdma_start = atiixp_bmdma_start,
263 .bmdma_stop = atiixp_bmdma_stop,
264
265 .prereset = atiixp_prereset,
266 .cable_detect = atiixp_cable_detect,
267 .set_piomode = atiixp_set_piomode,
268 .set_dmamode = atiixp_set_dmamode,
269 };
270
atiixp_init_one(struct pci_dev * pdev,const struct pci_device_id * id)271 static int atiixp_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
272 {
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
279 };
280 const struct ata_port_info *ppi[] = { &info, &info };
281
282 /* SB600 doesn't have secondary port wired */
283 if (pdev->device == PCI_DEVICE_ID_ATI_IXP600_IDE)
284 ppi[1] = &ata_dummy_port_info;
285
286 return ata_pci_bmdma_init_one(pdev, ppi, &atiixp_sht, NULL,
287 ATA_HOST_PARALLEL_SCAN);
288 }
289
290 static const struct pci_device_id atiixp[] = {
291 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP200_IDE), },
292 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP300_IDE), },
293 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP400_IDE), },
294 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP600_IDE), },
295 { PCI_VDEVICE(ATI, PCI_DEVICE_ID_ATI_IXP700_IDE), },
296 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_HUDSON2_IDE), },
297
298 { },
299 };
300
301 static struct pci_driver atiixp_pci_driver = {
302 .name = DRV_NAME,
303 .id_table = atiixp,
304 .probe = atiixp_init_one,
305 .remove = ata_pci_remove_one,
306 #ifdef CONFIG_PM_SLEEP
307 .resume = ata_pci_device_resume,
308 .suspend = ata_pci_device_suspend,
309 #endif
310 };
311
312 module_pci_driver(atiixp_pci_driver);
313
314 MODULE_AUTHOR("Alan Cox");
315 MODULE_DESCRIPTION("low-level driver for ATI IXP200/300/400");
316 MODULE_LICENSE("GPL");
317 MODULE_DEVICE_TABLE(pci, atiixp);
318 MODULE_VERSION(DRV_VERSION);
319