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