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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * pata_triflex.c - Compaq PATA for new ATA layer
4 * (C) 2005 Red Hat Inc
5 * Alan Cox <alan@lxorguk.ukuu.org.uk>
6 *
7 * based upon
8 *
9 * triflex.c
10 *
11 * IDE Chipset driver for the Compaq TriFlex IDE controller.
12 *
13 * Known to work with the Compaq Workstation 5x00 series.
14 *
15 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
16 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
17 *
18 * Loosely based on the piix & svwks drivers.
19 *
20 * Documentation:
21 * Not publicly available.
22 */
23
24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/pci.h>
27#include <linux/blkdev.h>
28#include <linux/delay.h>
29#include <scsi/scsi_host.h>
30#include <linux/libata.h>
31
32#define DRV_NAME "pata_triflex"
33#define DRV_VERSION "0.2.8"
34
35/**
36 * triflex_prereset - probe begin
37 * @link: ATA link
38 * @deadline: deadline jiffies for the operation
39 *
40 * Set up cable type and use generic probe init
41 */
42
43static int triflex_prereset(struct ata_link *link, unsigned long deadline)
44{
45 static const struct pci_bits triflex_enable_bits[] = {
46 { 0x80, 1, 0x01, 0x01 },
47 { 0x80, 1, 0x02, 0x02 }
48 };
49
50 struct ata_port *ap = link->ap;
51 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
52
53 if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
54 return -ENOENT;
55
56 return ata_sff_prereset(link, deadline);
57}
58
59
60
61/**
62 * triflex_load_timing - timing configuration
63 * @ap: ATA interface
64 * @adev: Device on the bus
65 * @speed: speed to configure
66 *
67 * The Triflex has one set of timings per device per channel. This
68 * means we must do some switching. As the PIO and DMA timings don't
69 * match we have to do some reloading unlike PIIX devices where tuning
70 * tricks can avoid it.
71 */
72
73static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed)
74{
75 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
76 u32 timing = 0;
77 u32 triflex_timing, old_triflex_timing;
78 int channel_offset = ap->port_no ? 0x74: 0x70;
79 unsigned int is_slave = (adev->devno != 0);
80
81
82 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
83 triflex_timing = old_triflex_timing;
84
85 switch(speed)
86 {
87 case XFER_MW_DMA_2:
88 timing = 0x0103;break;
89 case XFER_MW_DMA_1:
90 timing = 0x0203;break;
91 case XFER_MW_DMA_0:
92 timing = 0x0808;break;
93 case XFER_SW_DMA_2:
94 case XFER_SW_DMA_1:
95 case XFER_SW_DMA_0:
96 timing = 0x0F0F;break;
97 case XFER_PIO_4:
98 timing = 0x0202;break;
99 case XFER_PIO_3:
100 timing = 0x0204;break;
101 case XFER_PIO_2:
102 timing = 0x0404;break;
103 case XFER_PIO_1:
104 timing = 0x0508;break;
105 case XFER_PIO_0:
106 timing = 0x0808;break;
107 default:
108 BUG();
109 }
110 triflex_timing &= ~ (0xFFFF << (16 * is_slave));
111 triflex_timing |= (timing << (16 * is_slave));
112
113 if (triflex_timing != old_triflex_timing)
114 pci_write_config_dword(pdev, channel_offset, triflex_timing);
115}
116
117/**
118 * triflex_set_piomode - set initial PIO mode data
119 * @ap: ATA interface
120 * @adev: ATA device
121 *
122 * Use the timing loader to set up the PIO mode. We have to do this
123 * because DMA start/stop will only be called once DMA occurs. If there
124 * has been no DMA then the PIO timings are still needed.
125 */
126static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev)
127{
128 triflex_load_timing(ap, adev, adev->pio_mode);
129}
130
131/**
132 * triflex_bmdma_start - DMA start callback
133 * @qc: Command in progress
134 *
135 * Usually drivers set the DMA timing at the point the set_dmamode call
136 * is made. Triflex however requires we load new timings on the
137 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
138 * We load the DMA timings just before starting DMA and then restore
139 * the PIO timing when the DMA is finished.
140 */
141
142static void triflex_bmdma_start(struct ata_queued_cmd *qc)
143{
144 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
145 ata_bmdma_start(qc);
146}
147
148/**
149 * triflex_bmdma_stop - DMA stop callback
150 * @qc: ATA command
151 *
152 * We loaded new timings in dma_start, as a result we need to restore
153 * the PIO timings in dma_stop so that the next command issue gets the
154 * right clock values.
155 */
156
157static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
158{
159 ata_bmdma_stop(qc);
160 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
161}
162
163static const struct scsi_host_template triflex_sht = {
164 ATA_BMDMA_SHT(DRV_NAME),
165};
166
167static struct ata_port_operations triflex_port_ops = {
168 .inherits = &ata_bmdma_port_ops,
169 .bmdma_start = triflex_bmdma_start,
170 .bmdma_stop = triflex_bmdma_stop,
171 .cable_detect = ata_cable_40wire,
172 .set_piomode = triflex_set_piomode,
173 .prereset = triflex_prereset,
174};
175
176static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
177{
178 static const struct ata_port_info info = {
179 .flags = ATA_FLAG_SLAVE_POSS,
180 .pio_mask = ATA_PIO4,
181 .mwdma_mask = ATA_MWDMA2,
182 .port_ops = &triflex_port_ops
183 };
184 const struct ata_port_info *ppi[] = { &info, NULL };
185
186 ata_print_version_once(&dev->dev, DRV_VERSION);
187
188 return ata_pci_bmdma_init_one(dev, ppi, &triflex_sht, NULL, 0);
189}
190
191static const struct pci_device_id triflex[] = {
192 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },
193
194 { },
195};
196
197#ifdef CONFIG_PM_SLEEP
198static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
199{
200 struct ata_host *host = pci_get_drvdata(pdev);
201
202 ata_host_suspend(host, mesg);
203
204 /*
205 * We must not disable or powerdown the device.
206 * APM bios refuses to suspend if IDE is not accessible.
207 */
208 pci_save_state(pdev);
209
210 return 0;
211}
212
213#endif
214
215static struct pci_driver triflex_pci_driver = {
216 .name = DRV_NAME,
217 .id_table = triflex,
218 .probe = triflex_init_one,
219 .remove = ata_pci_remove_one,
220#ifdef CONFIG_PM_SLEEP
221 .suspend = triflex_ata_pci_device_suspend,
222 .resume = ata_pci_device_resume,
223#endif
224};
225
226module_pci_driver(triflex_pci_driver);
227
228MODULE_AUTHOR("Alan Cox");
229MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
230MODULE_LICENSE("GPL");
231MODULE_DEVICE_TABLE(pci, triflex);
232MODULE_VERSION(DRV_VERSION);
1/*
2 * pata_triflex.c - Compaq PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@lxorguk.ukuu.org.uk>
5 *
6 * based upon
7 *
8 * triflex.c
9 *
10 * IDE Chipset driver for the Compaq TriFlex IDE controller.
11 *
12 * Known to work with the Compaq Workstation 5x00 series.
13 *
14 * Copyright (C) 2002 Hewlett-Packard Development Group, L.P.
15 * Author: Torben Mathiasen <torben.mathiasen@hp.com>
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 *
30 * Loosely based on the piix & svwks drivers.
31 *
32 * Documentation:
33 * Not publicly available.
34 */
35
36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/pci.h>
39#include <linux/init.h>
40#include <linux/blkdev.h>
41#include <linux/delay.h>
42#include <scsi/scsi_host.h>
43#include <linux/libata.h>
44
45#define DRV_NAME "pata_triflex"
46#define DRV_VERSION "0.2.8"
47
48/**
49 * triflex_prereset - probe begin
50 * @link: ATA link
51 * @deadline: deadline jiffies for the operation
52 *
53 * Set up cable type and use generic probe init
54 */
55
56static int triflex_prereset(struct ata_link *link, unsigned long deadline)
57{
58 static const struct pci_bits triflex_enable_bits[] = {
59 { 0x80, 1, 0x01, 0x01 },
60 { 0x80, 1, 0x02, 0x02 }
61 };
62
63 struct ata_port *ap = link->ap;
64 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
65
66 if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no]))
67 return -ENOENT;
68
69 return ata_sff_prereset(link, deadline);
70}
71
72
73
74/**
75 * triflex_load_timing - timing configuration
76 * @ap: ATA interface
77 * @adev: Device on the bus
78 * @speed: speed to configure
79 *
80 * The Triflex has one set of timings per device per channel. This
81 * means we must do some switching. As the PIO and DMA timings don't
82 * match we have to do some reloading unlike PIIX devices where tuning
83 * tricks can avoid it.
84 */
85
86static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed)
87{
88 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
89 u32 timing = 0;
90 u32 triflex_timing, old_triflex_timing;
91 int channel_offset = ap->port_no ? 0x74: 0x70;
92 unsigned int is_slave = (adev->devno != 0);
93
94
95 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
96 triflex_timing = old_triflex_timing;
97
98 switch(speed)
99 {
100 case XFER_MW_DMA_2:
101 timing = 0x0103;break;
102 case XFER_MW_DMA_1:
103 timing = 0x0203;break;
104 case XFER_MW_DMA_0:
105 timing = 0x0808;break;
106 case XFER_SW_DMA_2:
107 case XFER_SW_DMA_1:
108 case XFER_SW_DMA_0:
109 timing = 0x0F0F;break;
110 case XFER_PIO_4:
111 timing = 0x0202;break;
112 case XFER_PIO_3:
113 timing = 0x0204;break;
114 case XFER_PIO_2:
115 timing = 0x0404;break;
116 case XFER_PIO_1:
117 timing = 0x0508;break;
118 case XFER_PIO_0:
119 timing = 0x0808;break;
120 default:
121 BUG();
122 }
123 triflex_timing &= ~ (0xFFFF << (16 * is_slave));
124 triflex_timing |= (timing << (16 * is_slave));
125
126 if (triflex_timing != old_triflex_timing)
127 pci_write_config_dword(pdev, channel_offset, triflex_timing);
128}
129
130/**
131 * triflex_set_piomode - set initial PIO mode data
132 * @ap: ATA interface
133 * @adev: ATA device
134 *
135 * Use the timing loader to set up the PIO mode. We have to do this
136 * because DMA start/stop will only be called once DMA occurs. If there
137 * has been no DMA then the PIO timings are still needed.
138 */
139static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev)
140{
141 triflex_load_timing(ap, adev, adev->pio_mode);
142}
143
144/**
145 * triflex_dma_start - DMA start callback
146 * @qc: Command in progress
147 *
148 * Usually drivers set the DMA timing at the point the set_dmamode call
149 * is made. Triflex however requires we load new timings on the
150 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
151 * We load the DMA timings just before starting DMA and then restore
152 * the PIO timing when the DMA is finished.
153 */
154
155static void triflex_bmdma_start(struct ata_queued_cmd *qc)
156{
157 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
158 ata_bmdma_start(qc);
159}
160
161/**
162 * triflex_dma_stop - DMA stop callback
163 * @ap: ATA interface
164 * @adev: ATA device
165 *
166 * We loaded new timings in dma_start, as a result we need to restore
167 * the PIO timings in dma_stop so that the next command issue gets the
168 * right clock values.
169 */
170
171static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
172{
173 ata_bmdma_stop(qc);
174 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
175}
176
177static struct scsi_host_template triflex_sht = {
178 ATA_BMDMA_SHT(DRV_NAME),
179};
180
181static struct ata_port_operations triflex_port_ops = {
182 .inherits = &ata_bmdma_port_ops,
183 .bmdma_start = triflex_bmdma_start,
184 .bmdma_stop = triflex_bmdma_stop,
185 .cable_detect = ata_cable_40wire,
186 .set_piomode = triflex_set_piomode,
187 .prereset = triflex_prereset,
188};
189
190static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
191{
192 static const struct ata_port_info info = {
193 .flags = ATA_FLAG_SLAVE_POSS,
194 .pio_mask = ATA_PIO4,
195 .mwdma_mask = ATA_MWDMA2,
196 .port_ops = &triflex_port_ops
197 };
198 const struct ata_port_info *ppi[] = { &info, NULL };
199
200 ata_print_version_once(&dev->dev, DRV_VERSION);
201
202 return ata_pci_bmdma_init_one(dev, ppi, &triflex_sht, NULL, 0);
203}
204
205static const struct pci_device_id triflex[] = {
206 { PCI_VDEVICE(COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE), },
207
208 { },
209};
210
211#ifdef CONFIG_PM
212static int triflex_ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
213{
214 struct ata_host *host = dev_get_drvdata(&pdev->dev);
215 int rc = 0;
216
217 rc = ata_host_suspend(host, mesg);
218 if (rc)
219 return rc;
220
221 /*
222 * We must not disable or powerdown the device.
223 * APM bios refuses to suspend if IDE is not accessible.
224 */
225 pci_save_state(pdev);
226
227 return 0;
228}
229
230#endif
231
232static struct pci_driver triflex_pci_driver = {
233 .name = DRV_NAME,
234 .id_table = triflex,
235 .probe = triflex_init_one,
236 .remove = ata_pci_remove_one,
237#ifdef CONFIG_PM
238 .suspend = triflex_ata_pci_device_suspend,
239 .resume = ata_pci_device_resume,
240#endif
241};
242
243static int __init triflex_init(void)
244{
245 return pci_register_driver(&triflex_pci_driver);
246}
247
248static void __exit triflex_exit(void)
249{
250 pci_unregister_driver(&triflex_pci_driver);
251}
252
253MODULE_AUTHOR("Alan Cox");
254MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
255MODULE_LICENSE("GPL");
256MODULE_DEVICE_TABLE(pci, triflex);
257MODULE_VERSION(DRV_VERSION);
258
259module_init(triflex_init);
260module_exit(triflex_exit);