Commit | Line | Data |
---|---|---|
025621f9 AC |
1 | /* |
2 | * ACPI PATA driver | |
3 | * | |
4 | * (c) 2007 Red Hat <alan@redhat.com> | |
5 | */ | |
6 | ||
7 | #include <linux/kernel.h> | |
8 | #include <linux/module.h> | |
9 | #include <linux/pci.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/blkdev.h> | |
12 | #include <linux/delay.h> | |
13 | #include <linux/device.h> | |
14 | #include <scsi/scsi_host.h> | |
15 | #include <acpi/acpi_bus.h> | |
16 | #include <acpi/acnames.h> | |
17 | #include <acpi/acnamesp.h> | |
18 | #include <acpi/acparser.h> | |
19 | #include <acpi/acexcep.h> | |
20 | #include <acpi/acmacros.h> | |
21 | #include <acpi/actypes.h> | |
22 | ||
23 | #include <linux/libata.h> | |
24 | #include <linux/ata.h> | |
25 | ||
26 | #define DRV_NAME "pata_acpi" | |
27 | #define DRV_VERSION "0.2.3" | |
28 | ||
29 | struct pata_acpi { | |
30 | struct ata_acpi_gtm gtm; | |
31 | void *last; | |
32 | unsigned long mask[2]; | |
33 | }; | |
34 | ||
35 | /** | |
36 | * pacpi_pre_reset - check for 40/80 pin | |
37 | * @ap: Port | |
38 | * @deadline: deadline jiffies for the operation | |
39 | * | |
40 | * Perform the PATA port setup we need. | |
41 | */ | |
42 | ||
43 | static int pacpi_pre_reset(struct ata_link *link, unsigned long deadline) | |
44 | { | |
45 | struct ata_port *ap = link->ap; | |
46 | struct pata_acpi *acpi = ap->private_data; | |
47 | if (ap->acpi_handle == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0) | |
48 | return -ENODEV; | |
49 | ||
9363c382 | 50 | return ata_sff_prereset(link, deadline); |
025621f9 AC |
51 | } |
52 | ||
53 | /** | |
54 | * pacpi_cable_detect - cable type detection | |
55 | * @ap: port to detect | |
56 | * | |
57 | * Perform device specific cable detection | |
58 | */ | |
59 | ||
60 | static int pacpi_cable_detect(struct ata_port *ap) | |
61 | { | |
62 | struct pata_acpi *acpi = ap->private_data; | |
63 | ||
64 | if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA)) | |
65 | return ATA_CBL_PATA80; | |
66 | else | |
67 | return ATA_CBL_PATA40; | |
68 | } | |
69 | ||
025621f9 AC |
70 | /** |
71 | * pacpi_discover_modes - filter non ACPI modes | |
72 | * @adev: ATA device | |
73 | * @mask: proposed modes | |
74 | * | |
75 | * Try the modes available and see which ones the ACPI method will | |
76 | * set up sensibly. From this we get a mask of ACPI modes we can use | |
77 | */ | |
78 | ||
79 | static unsigned long pacpi_discover_modes(struct ata_port *ap, struct ata_device *adev) | |
80 | { | |
025621f9 | 81 | struct pata_acpi *acpi = ap->private_data; |
025621f9 | 82 | struct ata_acpi_gtm probe; |
7c77fa4d | 83 | unsigned int xfer_mask; |
025621f9 AC |
84 | |
85 | probe = acpi->gtm; | |
86 | ||
025621f9 AC |
87 | ata_acpi_gtm(ap, &probe); |
88 | ||
7c77fa4d | 89 | xfer_mask = ata_acpi_gtm_xfermask(adev, &probe); |
025621f9 | 90 | |
7c77fa4d | 91 | if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA)) |
025621f9 | 92 | ap->cbl = ATA_CBL_PATA80; |
7c77fa4d TH |
93 | |
94 | return xfer_mask; | |
025621f9 AC |
95 | } |
96 | ||
97 | /** | |
98 | * pacpi_mode_filter - mode filter for ACPI | |
99 | * @adev: device | |
100 | * @mask: mask of valid modes | |
101 | * | |
102 | * Filter the valid mode list according to our own specific rules, in | |
103 | * this case the list of discovered valid modes obtained by ACPI probing | |
104 | */ | |
105 | ||
106 | static unsigned long pacpi_mode_filter(struct ata_device *adev, unsigned long mask) | |
107 | { | |
108 | struct pata_acpi *acpi = adev->link->ap->private_data; | |
9363c382 | 109 | return ata_bmdma_mode_filter(adev, mask & acpi->mask[adev->devno]); |
025621f9 AC |
110 | } |
111 | ||
112 | /** | |
113 | * pacpi_set_piomode - set initial PIO mode data | |
114 | * @ap: ATA interface | |
115 | * @adev: ATA device | |
116 | */ | |
117 | ||
118 | static void pacpi_set_piomode(struct ata_port *ap, struct ata_device *adev) | |
119 | { | |
120 | int unit = adev->devno; | |
121 | struct pata_acpi *acpi = ap->private_data; | |
a0f79b92 | 122 | const struct ata_timing *t; |
025621f9 | 123 | |
b447916e | 124 | if (!(acpi->gtm.flags & 0x10)) |
025621f9 AC |
125 | unit = 0; |
126 | ||
127 | /* Now stuff the nS values into the structure */ | |
a0f79b92 TH |
128 | t = ata_timing_find_mode(adev->pio_mode); |
129 | acpi->gtm.drive[unit].pio = t->cycle; | |
025621f9 AC |
130 | ata_acpi_stm(ap, &acpi->gtm); |
131 | /* See what mode we actually got */ | |
132 | ata_acpi_gtm(ap, &acpi->gtm); | |
133 | } | |
134 | ||
135 | /** | |
136 | * pacpi_set_dmamode - set initial DMA mode data | |
137 | * @ap: ATA interface | |
138 | * @adev: ATA device | |
139 | */ | |
140 | ||
141 | static void pacpi_set_dmamode(struct ata_port *ap, struct ata_device *adev) | |
142 | { | |
143 | int unit = adev->devno; | |
144 | struct pata_acpi *acpi = ap->private_data; | |
a0f79b92 | 145 | const struct ata_timing *t; |
025621f9 | 146 | |
b447916e | 147 | if (!(acpi->gtm.flags & 0x10)) |
025621f9 AC |
148 | unit = 0; |
149 | ||
150 | /* Now stuff the nS values into the structure */ | |
a0f79b92 | 151 | t = ata_timing_find_mode(adev->dma_mode); |
025621f9 | 152 | if (adev->dma_mode >= XFER_UDMA_0) { |
a0f79b92 | 153 | acpi->gtm.drive[unit].dma = t->udma; |
025621f9 AC |
154 | acpi->gtm.flags |= (1 << (2 * unit)); |
155 | } else { | |
a0f79b92 | 156 | acpi->gtm.drive[unit].dma = t->cycle; |
025621f9 AC |
157 | acpi->gtm.flags &= ~(1 << (2 * unit)); |
158 | } | |
159 | ata_acpi_stm(ap, &acpi->gtm); | |
160 | /* See what mode we actually got */ | |
161 | ata_acpi_gtm(ap, &acpi->gtm); | |
162 | } | |
163 | ||
164 | /** | |
9363c382 | 165 | * pacpi_qc_issue - command issue |
025621f9 AC |
166 | * @qc: command pending |
167 | * | |
168 | * Called when the libata layer is about to issue a command. We wrap | |
169 | * this interface so that we can load the correct ATA timings if | |
170 | * neccessary. | |
171 | */ | |
172 | ||
9363c382 | 173 | static unsigned int pacpi_qc_issue(struct ata_queued_cmd *qc) |
025621f9 AC |
174 | { |
175 | struct ata_port *ap = qc->ap; | |
176 | struct ata_device *adev = qc->dev; | |
177 | struct pata_acpi *acpi = ap->private_data; | |
178 | ||
179 | if (acpi->gtm.flags & 0x10) | |
9363c382 | 180 | return ata_sff_qc_issue(qc); |
025621f9 AC |
181 | |
182 | if (adev != acpi->last) { | |
183 | pacpi_set_piomode(ap, adev); | |
184 | if (adev->dma_mode) | |
185 | pacpi_set_dmamode(ap, adev); | |
186 | acpi->last = adev; | |
187 | } | |
9363c382 | 188 | return ata_sff_qc_issue(qc); |
025621f9 AC |
189 | } |
190 | ||
191 | /** | |
192 | * pacpi_port_start - port setup | |
193 | * @ap: ATA port being set up | |
194 | * | |
195 | * Use the port_start hook to maintain private control structures | |
196 | */ | |
197 | ||
198 | static int pacpi_port_start(struct ata_port *ap) | |
199 | { | |
200 | struct pci_dev *pdev = to_pci_dev(ap->host->dev); | |
201 | struct pata_acpi *acpi; | |
202 | ||
203 | int ret; | |
204 | ||
205 | if (ap->acpi_handle == NULL) | |
206 | return -ENODEV; | |
207 | ||
208 | acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL); | |
209 | if (ap->private_data == NULL) | |
210 | return -ENOMEM; | |
211 | acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]); | |
212 | acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]); | |
213 | ret = ata_sff_port_start(ap); | |
214 | if (ret < 0) | |
215 | return ret; | |
216 | ||
217 | return ret; | |
218 | } | |
219 | ||
220 | static struct scsi_host_template pacpi_sht = { | |
68d1d07b | 221 | ATA_BMDMA_SHT(DRV_NAME), |
025621f9 AC |
222 | }; |
223 | ||
029cfd6b TH |
224 | static struct ata_port_operations pacpi_ops = { |
225 | .inherits = &ata_bmdma_port_ops, | |
9363c382 | 226 | .qc_issue = pacpi_qc_issue, |
029cfd6b TH |
227 | .cable_detect = pacpi_cable_detect, |
228 | .mode_filter = pacpi_mode_filter, | |
025621f9 AC |
229 | .set_piomode = pacpi_set_piomode, |
230 | .set_dmamode = pacpi_set_dmamode, | |
887125e3 | 231 | .prereset = pacpi_pre_reset, |
025621f9 AC |
232 | .port_start = pacpi_port_start, |
233 | }; | |
234 | ||
235 | ||
236 | /** | |
237 | * pacpi_init_one - Register ACPI ATA PCI device with kernel services | |
238 | * @pdev: PCI device to register | |
239 | * @ent: Entry in pacpi_pci_tbl matching with @pdev | |
240 | * | |
241 | * Called from kernel PCI layer. | |
242 | * | |
243 | * LOCKING: | |
244 | * Inherited from PCI layer (may sleep). | |
245 | * | |
246 | * RETURNS: | |
247 | * Zero on success, or -ERRNO value. | |
248 | */ | |
249 | ||
250 | static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id) | |
251 | { | |
252 | static const struct ata_port_info info = { | |
025621f9 AC |
253 | .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST, |
254 | ||
255 | .pio_mask = 0x1f, | |
256 | .mwdma_mask = 0x07, | |
257 | .udma_mask = 0x7f, | |
258 | ||
259 | .port_ops = &pacpi_ops, | |
260 | }; | |
261 | const struct ata_port_info *ppi[] = { &info, NULL }; | |
9363c382 | 262 | return ata_pci_sff_init_one(pdev, ppi, &pacpi_sht, NULL); |
025621f9 AC |
263 | } |
264 | ||
265 | static const struct pci_device_id pacpi_pci_tbl[] = { | |
266 | { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1}, | |
267 | { } /* terminate list */ | |
268 | }; | |
269 | ||
270 | static struct pci_driver pacpi_pci_driver = { | |
271 | .name = DRV_NAME, | |
272 | .id_table = pacpi_pci_tbl, | |
273 | .probe = pacpi_init_one, | |
274 | .remove = ata_pci_remove_one, | |
8e2840e0 | 275 | #ifdef CONFIG_PM |
025621f9 AC |
276 | .suspend = ata_pci_device_suspend, |
277 | .resume = ata_pci_device_resume, | |
8e2840e0 | 278 | #endif |
025621f9 AC |
279 | }; |
280 | ||
281 | static int __init pacpi_init(void) | |
282 | { | |
283 | return pci_register_driver(&pacpi_pci_driver); | |
284 | } | |
285 | ||
286 | static void __exit pacpi_exit(void) | |
287 | { | |
288 | pci_unregister_driver(&pacpi_pci_driver); | |
289 | } | |
290 | ||
291 | module_init(pacpi_init); | |
292 | module_exit(pacpi_exit); | |
293 | ||
294 | MODULE_AUTHOR("Alan Cox"); | |
295 | MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode"); | |
296 | MODULE_LICENSE("GPL"); | |
297 | MODULE_DEVICE_TABLE(pci, pacpi_pci_tbl); | |
298 | MODULE_VERSION(DRV_VERSION); | |
299 |