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1/*
2 * ACPI PATA driver
3 *
4 * (c) 2007 Red Hat
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 <linux/gfp.h>
15#include <scsi/scsi_host.h>
16#include <acpi/acpi_bus.h>
17
18#include <linux/libata.h>
19#include <linux/ata.h>
20
21#define DRV_NAME "pata_acpi"
22#define DRV_VERSION "0.2.3"
23
24struct pata_acpi {
25 struct ata_acpi_gtm gtm;
26 void *last;
27 unsigned long mask[2];
28};
29
30/**
31 * pacpi_pre_reset - check for 40/80 pin
32 * @ap: Port
33 * @deadline: deadline jiffies for the operation
34 *
35 * Perform the PATA port setup we need.
36 */
37
38static int pacpi_pre_reset(struct ata_link *link, unsigned long deadline)
39{
40 struct ata_port *ap = link->ap;
41 struct pata_acpi *acpi = ap->private_data;
42 if (ap->acpi_handle == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0)
43 return -ENODEV;
44
45 return ata_sff_prereset(link, deadline);
46}
47
48/**
49 * pacpi_cable_detect - cable type detection
50 * @ap: port to detect
51 *
52 * Perform device specific cable detection
53 */
54
55static int pacpi_cable_detect(struct ata_port *ap)
56{
57 struct pata_acpi *acpi = ap->private_data;
58
59 if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA))
60 return ATA_CBL_PATA80;
61 else
62 return ATA_CBL_PATA40;
63}
64
65/**
66 * pacpi_discover_modes - filter non ACPI modes
67 * @adev: ATA device
68 * @mask: proposed modes
69 *
70 * Try the modes available and see which ones the ACPI method will
71 * set up sensibly. From this we get a mask of ACPI modes we can use
72 */
73
74static unsigned long pacpi_discover_modes(struct ata_port *ap, struct ata_device *adev)
75{
76 struct pata_acpi *acpi = ap->private_data;
77 struct ata_acpi_gtm probe;
78 unsigned int xfer_mask;
79
80 probe = acpi->gtm;
81
82 ata_acpi_gtm(ap, &probe);
83
84 xfer_mask = ata_acpi_gtm_xfermask(adev, &probe);
85
86 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
87 ap->cbl = ATA_CBL_PATA80;
88
89 return xfer_mask;
90}
91
92/**
93 * pacpi_mode_filter - mode filter for ACPI
94 * @adev: device
95 * @mask: mask of valid modes
96 *
97 * Filter the valid mode list according to our own specific rules, in
98 * this case the list of discovered valid modes obtained by ACPI probing
99 */
100
101static unsigned long pacpi_mode_filter(struct ata_device *adev, unsigned long mask)
102{
103 struct pata_acpi *acpi = adev->link->ap->private_data;
104 return mask & acpi->mask[adev->devno];
105}
106
107/**
108 * pacpi_set_piomode - set initial PIO mode data
109 * @ap: ATA interface
110 * @adev: ATA device
111 */
112
113static void pacpi_set_piomode(struct ata_port *ap, struct ata_device *adev)
114{
115 int unit = adev->devno;
116 struct pata_acpi *acpi = ap->private_data;
117 const struct ata_timing *t;
118
119 if (!(acpi->gtm.flags & 0x10))
120 unit = 0;
121
122 /* Now stuff the nS values into the structure */
123 t = ata_timing_find_mode(adev->pio_mode);
124 acpi->gtm.drive[unit].pio = t->cycle;
125 ata_acpi_stm(ap, &acpi->gtm);
126 /* See what mode we actually got */
127 ata_acpi_gtm(ap, &acpi->gtm);
128}
129
130/**
131 * pacpi_set_dmamode - set initial DMA mode data
132 * @ap: ATA interface
133 * @adev: ATA device
134 */
135
136static void pacpi_set_dmamode(struct ata_port *ap, struct ata_device *adev)
137{
138 int unit = adev->devno;
139 struct pata_acpi *acpi = ap->private_data;
140 const struct ata_timing *t;
141
142 if (!(acpi->gtm.flags & 0x10))
143 unit = 0;
144
145 /* Now stuff the nS values into the structure */
146 t = ata_timing_find_mode(adev->dma_mode);
147 if (adev->dma_mode >= XFER_UDMA_0) {
148 acpi->gtm.drive[unit].dma = t->udma;
149 acpi->gtm.flags |= (1 << (2 * unit));
150 } else {
151 acpi->gtm.drive[unit].dma = t->cycle;
152 acpi->gtm.flags &= ~(1 << (2 * unit));
153 }
154 ata_acpi_stm(ap, &acpi->gtm);
155 /* See what mode we actually got */
156 ata_acpi_gtm(ap, &acpi->gtm);
157}
158
159/**
160 * pacpi_qc_issue - command issue
161 * @qc: command pending
162 *
163 * Called when the libata layer is about to issue a command. We wrap
164 * this interface so that we can load the correct ATA timings if
165 * necessary.
166 */
167
168static unsigned int pacpi_qc_issue(struct ata_queued_cmd *qc)
169{
170 struct ata_port *ap = qc->ap;
171 struct ata_device *adev = qc->dev;
172 struct pata_acpi *acpi = ap->private_data;
173
174 if (acpi->gtm.flags & 0x10)
175 return ata_bmdma_qc_issue(qc);
176
177 if (adev != acpi->last) {
178 pacpi_set_piomode(ap, adev);
179 if (ata_dma_enabled(adev))
180 pacpi_set_dmamode(ap, adev);
181 acpi->last = adev;
182 }
183 return ata_bmdma_qc_issue(qc);
184}
185
186/**
187 * pacpi_port_start - port setup
188 * @ap: ATA port being set up
189 *
190 * Use the port_start hook to maintain private control structures
191 */
192
193static int pacpi_port_start(struct ata_port *ap)
194{
195 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
196 struct pata_acpi *acpi;
197
198 if (ap->acpi_handle == NULL)
199 return -ENODEV;
200
201 acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL);
202 if (ap->private_data == NULL)
203 return -ENOMEM;
204 acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]);
205 acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]);
206 return ata_bmdma_port_start(ap);
207}
208
209static struct scsi_host_template pacpi_sht = {
210 ATA_BMDMA_SHT(DRV_NAME),
211};
212
213static struct ata_port_operations pacpi_ops = {
214 .inherits = &ata_bmdma_port_ops,
215 .qc_issue = pacpi_qc_issue,
216 .cable_detect = pacpi_cable_detect,
217 .mode_filter = pacpi_mode_filter,
218 .set_piomode = pacpi_set_piomode,
219 .set_dmamode = pacpi_set_dmamode,
220 .prereset = pacpi_pre_reset,
221 .port_start = pacpi_port_start,
222};
223
224
225/**
226 * pacpi_init_one - Register ACPI ATA PCI device with kernel services
227 * @pdev: PCI device to register
228 * @ent: Entry in pacpi_pci_tbl matching with @pdev
229 *
230 * Called from kernel PCI layer.
231 *
232 * LOCKING:
233 * Inherited from PCI layer (may sleep).
234 *
235 * RETURNS:
236 * Zero on success, or -ERRNO value.
237 */
238
239static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
240{
241 static const struct ata_port_info info = {
242 .flags = ATA_FLAG_SLAVE_POSS,
243
244 .pio_mask = ATA_PIO4,
245 .mwdma_mask = ATA_MWDMA2,
246 .udma_mask = ATA_UDMA6,
247
248 .port_ops = &pacpi_ops,
249 };
250 const struct ata_port_info *ppi[] = { &info, NULL };
251 if (pdev->vendor == PCI_VENDOR_ID_ATI) {
252 int rc = pcim_enable_device(pdev);
253 if (rc < 0)
254 return rc;
255 pcim_pin_device(pdev);
256 }
257 return ata_pci_bmdma_init_one(pdev, ppi, &pacpi_sht, NULL, 0);
258}
259
260static const struct pci_device_id pacpi_pci_tbl[] = {
261 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
262 { } /* terminate list */
263};
264
265static struct pci_driver pacpi_pci_driver = {
266 .name = DRV_NAME,
267 .id_table = pacpi_pci_tbl,
268 .probe = pacpi_init_one,
269 .remove = ata_pci_remove_one,
270#ifdef CONFIG_PM
271 .suspend = ata_pci_device_suspend,
272 .resume = ata_pci_device_resume,
273#endif
274};
275
276static int __init pacpi_init(void)
277{
278 return pci_register_driver(&pacpi_pci_driver);
279}
280
281static void __exit pacpi_exit(void)
282{
283 pci_unregister_driver(&pacpi_pci_driver);
284}
285
286module_init(pacpi_init);
287module_exit(pacpi_exit);
288
289MODULE_AUTHOR("Alan Cox");
290MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode");
291MODULE_LICENSE("GPL");
292MODULE_DEVICE_TABLE(pci, pacpi_pci_tbl);
293MODULE_VERSION(DRV_VERSION);
294
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ACPI PATA driver
4 *
5 * (c) 2007 Red Hat
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/blkdev.h>
12#include <linux/delay.h>
13#include <linux/device.h>
14#include <linux/gfp.h>
15#include <linux/acpi.h>
16#include <linux/libata.h>
17#include <linux/ata.h>
18#include <scsi/scsi_host.h>
19
20#define DRV_NAME "pata_acpi"
21#define DRV_VERSION "0.2.3"
22
23struct pata_acpi {
24 struct ata_acpi_gtm gtm;
25 void *last;
26 unsigned long mask[2];
27};
28
29/**
30 * pacpi_pre_reset - check for 40/80 pin
31 * @link: ATA link
32 * @deadline: deadline jiffies for the operation
33 *
34 * Perform the PATA port setup we need.
35 */
36
37static int pacpi_pre_reset(struct ata_link *link, unsigned long deadline)
38{
39 struct ata_port *ap = link->ap;
40 struct pata_acpi *acpi = ap->private_data;
41 if (ACPI_HANDLE(&ap->tdev) == NULL || ata_acpi_gtm(ap, &acpi->gtm) < 0)
42 return -ENODEV;
43
44 return ata_sff_prereset(link, deadline);
45}
46
47/**
48 * pacpi_cable_detect - cable type detection
49 * @ap: port to detect
50 *
51 * Perform device specific cable detection
52 */
53
54static int pacpi_cable_detect(struct ata_port *ap)
55{
56 struct pata_acpi *acpi = ap->private_data;
57
58 if ((acpi->mask[0] | acpi->mask[1]) & (0xF8 << ATA_SHIFT_UDMA))
59 return ATA_CBL_PATA80;
60 else
61 return ATA_CBL_PATA40;
62}
63
64/**
65 * pacpi_discover_modes - filter non ACPI modes
66 * @ap: ATA port
67 * @adev: ATA device
68 *
69 * Try the modes available and see which ones the ACPI method will
70 * set up sensibly. From this we get a mask of ACPI modes we can use
71 */
72
73static unsigned long pacpi_discover_modes(struct ata_port *ap, struct ata_device *adev)
74{
75 struct pata_acpi *acpi = ap->private_data;
76 struct ata_acpi_gtm probe;
77 unsigned int xfer_mask;
78
79 probe = acpi->gtm;
80
81 ata_acpi_gtm(ap, &probe);
82
83 xfer_mask = ata_acpi_gtm_xfermask(adev, &probe);
84
85 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
86 ap->cbl = ATA_CBL_PATA80;
87
88 return xfer_mask;
89}
90
91/**
92 * pacpi_mode_filter - mode filter for ACPI
93 * @adev: device
94 * @mask: mask of valid modes
95 *
96 * Filter the valid mode list according to our own specific rules, in
97 * this case the list of discovered valid modes obtained by ACPI probing
98 */
99
100static unsigned int pacpi_mode_filter(struct ata_device *adev, unsigned int mask)
101{
102 struct pata_acpi *acpi = adev->link->ap->private_data;
103 return mask & acpi->mask[adev->devno];
104}
105
106/**
107 * pacpi_set_piomode - set initial PIO mode data
108 * @ap: ATA interface
109 * @adev: ATA device
110 */
111
112static void pacpi_set_piomode(struct ata_port *ap, struct ata_device *adev)
113{
114 int unit = adev->devno;
115 struct pata_acpi *acpi = ap->private_data;
116 const struct ata_timing *t;
117
118 if (!(acpi->gtm.flags & 0x10))
119 unit = 0;
120
121 /* Now stuff the nS values into the structure */
122 t = ata_timing_find_mode(adev->pio_mode);
123 acpi->gtm.drive[unit].pio = t->cycle;
124 ata_acpi_stm(ap, &acpi->gtm);
125 /* See what mode we actually got */
126 ata_acpi_gtm(ap, &acpi->gtm);
127}
128
129/**
130 * pacpi_set_dmamode - set initial DMA mode data
131 * @ap: ATA interface
132 * @adev: ATA device
133 */
134
135static void pacpi_set_dmamode(struct ata_port *ap, struct ata_device *adev)
136{
137 int unit = adev->devno;
138 struct pata_acpi *acpi = ap->private_data;
139 const struct ata_timing *t;
140
141 if (!(acpi->gtm.flags & 0x10))
142 unit = 0;
143
144 /* Now stuff the nS values into the structure */
145 t = ata_timing_find_mode(adev->dma_mode);
146 if (adev->dma_mode >= XFER_UDMA_0) {
147 acpi->gtm.drive[unit].dma = t->udma;
148 acpi->gtm.flags |= (1 << (2 * unit));
149 } else {
150 acpi->gtm.drive[unit].dma = t->cycle;
151 acpi->gtm.flags &= ~(1 << (2 * unit));
152 }
153 ata_acpi_stm(ap, &acpi->gtm);
154 /* See what mode we actually got */
155 ata_acpi_gtm(ap, &acpi->gtm);
156}
157
158/**
159 * pacpi_qc_issue - command issue
160 * @qc: command pending
161 *
162 * Called when the libata layer is about to issue a command. We wrap
163 * this interface so that we can load the correct ATA timings if
164 * necessary.
165 */
166
167static unsigned int pacpi_qc_issue(struct ata_queued_cmd *qc)
168{
169 struct ata_port *ap = qc->ap;
170 struct ata_device *adev = qc->dev;
171 struct pata_acpi *acpi = ap->private_data;
172
173 if (acpi->gtm.flags & 0x10)
174 return ata_bmdma_qc_issue(qc);
175
176 if (adev != acpi->last) {
177 pacpi_set_piomode(ap, adev);
178 if (ata_dma_enabled(adev))
179 pacpi_set_dmamode(ap, adev);
180 acpi->last = adev;
181 }
182 return ata_bmdma_qc_issue(qc);
183}
184
185/**
186 * pacpi_port_start - port setup
187 * @ap: ATA port being set up
188 *
189 * Use the port_start hook to maintain private control structures
190 */
191
192static int pacpi_port_start(struct ata_port *ap)
193{
194 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
195 struct pata_acpi *acpi;
196
197 if (ACPI_HANDLE(&ap->tdev) == NULL)
198 return -ENODEV;
199
200 acpi = ap->private_data = devm_kzalloc(&pdev->dev, sizeof(struct pata_acpi), GFP_KERNEL);
201 if (ap->private_data == NULL)
202 return -ENOMEM;
203 acpi->mask[0] = pacpi_discover_modes(ap, &ap->link.device[0]);
204 acpi->mask[1] = pacpi_discover_modes(ap, &ap->link.device[1]);
205 return ata_bmdma_port_start(ap);
206}
207
208static const struct scsi_host_template pacpi_sht = {
209 ATA_BMDMA_SHT(DRV_NAME),
210};
211
212static struct ata_port_operations pacpi_ops = {
213 .inherits = &ata_bmdma_port_ops,
214 .qc_issue = pacpi_qc_issue,
215 .cable_detect = pacpi_cable_detect,
216 .mode_filter = pacpi_mode_filter,
217 .set_piomode = pacpi_set_piomode,
218 .set_dmamode = pacpi_set_dmamode,
219 .prereset = pacpi_pre_reset,
220 .port_start = pacpi_port_start,
221};
222
223
224/**
225 * pacpi_init_one - Register ACPI ATA PCI device with kernel services
226 * @pdev: PCI device to register
227 * @id: PCI device ID
228 *
229 * Called from kernel PCI layer.
230 *
231 * LOCKING:
232 * Inherited from PCI layer (may sleep).
233 *
234 * RETURNS:
235 * Zero on success, or -ERRNO value.
236 */
237
238static int pacpi_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
239{
240 static const struct ata_port_info info = {
241 .flags = ATA_FLAG_SLAVE_POSS,
242
243 .pio_mask = ATA_PIO4,
244 .mwdma_mask = ATA_MWDMA2,
245 .udma_mask = ATA_UDMA6,
246
247 .port_ops = &pacpi_ops,
248 };
249 const struct ata_port_info *ppi[] = { &info, NULL };
250 if (pdev->vendor == PCI_VENDOR_ID_ATI) {
251 int rc = pcim_enable_device(pdev);
252 if (rc < 0)
253 return rc;
254 pcim_pin_device(pdev);
255 }
256 return ata_pci_bmdma_init_one(pdev, ppi, &pacpi_sht, NULL, 0);
257}
258
259static const struct pci_device_id pacpi_pci_tbl[] = {
260 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE << 8, 0xFFFFFF00UL, 1},
261 { } /* terminate list */
262};
263
264static struct pci_driver pacpi_pci_driver = {
265 .name = DRV_NAME,
266 .id_table = pacpi_pci_tbl,
267 .probe = pacpi_init_one,
268 .remove = ata_pci_remove_one,
269#ifdef CONFIG_PM_SLEEP
270 .suspend = ata_pci_device_suspend,
271 .resume = ata_pci_device_resume,
272#endif
273};
274
275module_pci_driver(pacpi_pci_driver);
276
277MODULE_AUTHOR("Alan Cox");
278MODULE_DESCRIPTION("SCSI low-level driver for ATA in ACPI mode");
279MODULE_LICENSE("GPL");
280MODULE_DEVICE_TABLE(pci, pacpi_pci_tbl);
281MODULE_VERSION(DRV_VERSION);