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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
2 * pata_triflex.c - Compaq PATA for new ATA layer
3 * (C) 2005 Red Hat Inc
4 * Alan Cox <alan@redhat.com>
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 publically 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 "0.2.5"
47
48/**
49 * triflex_probe_init - probe begin
50 * @ap: ATA port
51 *
52 * Set up cable type and use generic probe init
53 */
54
55static int triflex_probe_init(struct ata_port *ap)
56{
57 static const struct pci_bits triflex_enable_bits[] = {
58 { 0x80, 1, 0x01, 0x01 },
59 { 0x80, 1, 0x02, 0x02 }
60 };
61
62 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -040063
Jeff Garzik669a5db2006-08-29 18:12:40 -040064 if (!pci_test_config_bits(pdev, &triflex_enable_bits[ap->port_no])) {
65 ata_port_disable(ap);
66 printk(KERN_INFO "ata%u: port disabled. ignoring.\n", ap->id);
67 return 0;
68 }
69 ap->cbl = ATA_CBL_PATA40;
70 return ata_std_prereset(ap);
71}
72
73
74
75static void triflex_error_handler(struct ata_port *ap)
76{
77 ata_bmdma_drive_eh(ap, triflex_probe_init, ata_std_softreset, NULL, ata_std_postreset);
78}
79
80/**
81 * triflex_load_timing - timing configuration
82 * @ap: ATA interface
83 * @adev: Device on the bus
84 * @speed: speed to configure
85 *
86 * The Triflex has one set of timings per device per channel. This
87 * means we must do some switching. As the PIO and DMA timings don't
88 * match we have to do some reloading unlike PIIX devices where tuning
89 * tricks can avoid it.
90 */
91
92static void triflex_load_timing(struct ata_port *ap, struct ata_device *adev, int speed)
93{
94 struct pci_dev *pdev = to_pci_dev(ap->host->dev);
95 u32 timing = 0;
96 u32 triflex_timing, old_triflex_timing;
97 int channel_offset = ap->port_no ? 0x74: 0x70;
98 unsigned int is_slave = (adev->devno != 0);
99
100
101 pci_read_config_dword(pdev, channel_offset, &old_triflex_timing);
102 triflex_timing = old_triflex_timing;
103
104 switch(speed)
105 {
106 case XFER_MW_DMA_2:
107 timing = 0x0103;break;
108 case XFER_MW_DMA_1:
109 timing = 0x0203;break;
110 case XFER_MW_DMA_0:
111 timing = 0x0808;break;
112 case XFER_SW_DMA_2:
113 case XFER_SW_DMA_1:
114 case XFER_SW_DMA_0:
115 timing = 0x0F0F;break;
116 case XFER_PIO_4:
117 timing = 0x0202;break;
118 case XFER_PIO_3:
119 timing = 0x0204;break;
120 case XFER_PIO_2:
121 timing = 0x0404;break;
122 case XFER_PIO_1:
123 timing = 0x0508;break;
124 case XFER_PIO_0:
125 timing = 0x0808;break;
126 default:
127 BUG();
128 }
129 triflex_timing &= ~ (0xFFFF << (16 * is_slave));
130 triflex_timing |= (timing << (16 * is_slave));
131
132 if (triflex_timing != old_triflex_timing)
133 pci_write_config_dword(pdev, channel_offset, triflex_timing);
134}
135
136/**
137 * triflex_set_piomode - set initial PIO mode data
138 * @ap: ATA interface
139 * @adev: ATA device
140 *
141 * Use the timing loader to set up the PIO mode. We have to do this
142 * because DMA start/stop will only be called once DMA occurs. If there
143 * has been no DMA then the PIO timings are still needed.
144 */
145static void triflex_set_piomode(struct ata_port *ap, struct ata_device *adev)
146{
147 triflex_load_timing(ap, adev, adev->pio_mode);
148}
149
150/**
151 * triflex_dma_start - DMA start callback
152 * @qc: Command in progress
153 *
154 * Usually drivers set the DMA timing at the point the set_dmamode call
155 * is made. Triflex however requires we load new timings on the
156 * transition or keep matching PIO/DMA pairs (ie MWDMA2/PIO4 etc).
157 * We load the DMA timings just before starting DMA and then restore
158 * the PIO timing when the DMA is finished.
159 */
160
161static void triflex_bmdma_start(struct ata_queued_cmd *qc)
162{
163 triflex_load_timing(qc->ap, qc->dev, qc->dev->dma_mode);
164 ata_bmdma_start(qc);
165}
166
167/**
168 * triflex_dma_stop - DMA stop callback
169 * @ap: ATA interface
170 * @adev: ATA device
171 *
172 * We loaded new timings in dma_start, as a result we need to restore
173 * the PIO timings in dma_stop so that the next command issue gets the
174 * right clock values.
175 */
176
177static void triflex_bmdma_stop(struct ata_queued_cmd *qc)
178{
179 ata_bmdma_stop(qc);
180 triflex_load_timing(qc->ap, qc->dev, qc->dev->pio_mode);
181}
182
183static struct scsi_host_template triflex_sht = {
184 .module = THIS_MODULE,
185 .name = DRV_NAME,
186 .ioctl = ata_scsi_ioctl,
187 .queuecommand = ata_scsi_queuecmd,
188 .can_queue = ATA_DEF_QUEUE,
189 .this_id = ATA_SHT_THIS_ID,
190 .sg_tablesize = LIBATA_MAX_PRD,
191 .max_sectors = ATA_MAX_SECTORS,
192 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
193 .emulated = ATA_SHT_EMULATED,
194 .use_clustering = ATA_SHT_USE_CLUSTERING,
195 .proc_name = DRV_NAME,
196 .dma_boundary = ATA_DMA_BOUNDARY,
197 .slave_configure = ata_scsi_slave_config,
198 .bios_param = ata_std_bios_param,
199};
200
201static struct ata_port_operations triflex_port_ops = {
202 .port_disable = ata_port_disable,
203 .set_piomode = triflex_set_piomode,
204 .mode_filter = ata_pci_default_filter,
205
206 .tf_load = ata_tf_load,
207 .tf_read = ata_tf_read,
208 .check_status = ata_check_status,
209 .exec_command = ata_exec_command,
210 .dev_select = ata_std_dev_select,
211
212 .freeze = ata_bmdma_freeze,
213 .thaw = ata_bmdma_thaw,
214 .error_handler = triflex_error_handler,
215 .post_internal_cmd = ata_bmdma_post_internal_cmd,
216
217 .bmdma_setup = ata_bmdma_setup,
218 .bmdma_start = triflex_bmdma_start,
219 .bmdma_stop = triflex_bmdma_stop,
220 .bmdma_status = ata_bmdma_status,
221
222 .qc_prep = ata_qc_prep,
223 .qc_issue = ata_qc_issue_prot,
224 .eng_timeout = ata_eng_timeout,
225 .data_xfer = ata_pio_data_xfer,
226
227 .irq_handler = ata_interrupt,
228 .irq_clear = ata_bmdma_irq_clear,
229
230 .port_start = ata_port_start,
231 .port_stop = ata_port_stop,
232 .host_stop = ata_host_stop
233};
234
235static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
236{
237 static struct ata_port_info info = {
238 .sht = &triflex_sht,
239 .flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
240 .pio_mask = 0x1f,
241 .mwdma_mask = 0x07,
242 .port_ops = &triflex_port_ops
243 };
244 static struct ata_port_info *port_info[2] = { &info, &info };
245 static int printed_version;
246
247 if (!printed_version++)
248 dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
249
250 return ata_pci_init_one(dev, port_info, 2);
251}
252
253static const struct pci_device_id triflex[] = {
254 { PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_TRIFLEX_IDE,
255 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
256 { 0, },
257};
258
259static struct pci_driver triflex_pci_driver = {
260 .name = DRV_NAME,
261 .id_table = triflex,
262 .probe = triflex_init_one,
263 .remove = ata_pci_remove_one
264};
265
266static int __init triflex_init(void)
267{
268 return pci_register_driver(&triflex_pci_driver);
269}
270
271
272static void __exit triflex_exit(void)
273{
274 pci_unregister_driver(&triflex_pci_driver);
275}
276
277
278MODULE_AUTHOR("Alan Cox");
279MODULE_DESCRIPTION("low-level driver for Compaq Triflex");
280MODULE_LICENSE("GPL");
281MODULE_DEVICE_TABLE(pci, triflex);
282MODULE_VERSION(DRV_VERSION);
283
284module_init(triflex_init);
285module_exit(triflex_exit);