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Diffstat (limited to 'drivers/ata/pata_qdi.c')
-rw-r--r--drivers/ata/pata_qdi.c366
1 files changed, 0 insertions, 366 deletions
diff --git a/drivers/ata/pata_qdi.c b/drivers/ata/pata_qdi.c
deleted file mode 100644
index 45879dc6fa41..000000000000
--- a/drivers/ata/pata_qdi.c
+++ /dev/null
@@ -1,366 +0,0 @@
1/*
2 * pata_qdi.c - QDI VLB ATA controllers
3 * (C) 2006 Red Hat
4 *
5 * This driver mostly exists as a proof of concept for non PCI devices under
6 * libata. While the QDI6580 was 'neat' in 1993 it is no longer terribly
7 * useful.
8 *
9 * Tuning code written from the documentation at
10 * http://www.ryston.cz/petr/vlb/qd6500.html
11 * http://www.ryston.cz/petr/vlb/qd6580.html
12 *
13 * Probe code based on drivers/ide/legacy/qd65xx.c
14 * Rewritten from the work of Colten Edwards <pje120@cs.usask.ca> by
15 * Samuel Thibault <samuel.thibault@ens-lyon.org>
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/pci.h>
21#include <linux/init.h>
22#include <linux/blkdev.h>
23#include <linux/delay.h>
24#include <scsi/scsi_host.h>
25#include <linux/libata.h>
26#include <linux/platform_device.h>
27
28#define DRV_NAME "pata_qdi"
29#define DRV_VERSION "0.3.1"
30
31#define NR_HOST 4 /* Two 6580s */
32
33struct qdi_data {
34 unsigned long timing;
35 u8 clock[2];
36 u8 last;
37 int fast;
38 struct platform_device *platform_dev;
39
40};
41
42static struct ata_host *qdi_host[NR_HOST];
43static struct qdi_data qdi_data[NR_HOST];
44static int nr_qdi_host;
45
46#ifdef MODULE
47static int probe_qdi = 1;
48#else
49static int probe_qdi;
50#endif
51
52static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
53{
54 struct ata_timing t;
55 struct qdi_data *qdi = ap->host->private_data;
56 int active, recovery;
57 u8 timing;
58
59 /* Get the timing data in cycles */
60 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
61
62 if (qdi->fast) {
63 active = 8 - clamp_val(t.active, 1, 8);
64 recovery = 18 - clamp_val(t.recover, 3, 18);
65 } else {
66 active = 9 - clamp_val(t.active, 2, 9);
67 recovery = 15 - clamp_val(t.recover, 0, 15);
68 }
69 timing = (recovery << 4) | active | 0x08;
70
71 qdi->clock[adev->devno] = timing;
72
73 outb(timing, qdi->timing);
74}
75
76static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
77{
78 struct ata_timing t;
79 struct qdi_data *qdi = ap->host->private_data;
80 int active, recovery;
81 u8 timing;
82
83 /* Get the timing data in cycles */
84 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
85
86 if (qdi->fast) {
87 active = 8 - clamp_val(t.active, 1, 8);
88 recovery = 18 - clamp_val(t.recover, 3, 18);
89 } else {
90 active = 9 - clamp_val(t.active, 2, 9);
91 recovery = 15 - clamp_val(t.recover, 0, 15);
92 }
93 timing = (recovery << 4) | active | 0x08;
94
95 qdi->clock[adev->devno] = timing;
96
97 outb(timing, qdi->timing);
98
99 /* Clear the FIFO */
100 if (adev->class != ATA_DEV_ATA)
101 outb(0x5F, (qdi->timing & 0xFFF0) + 3);
102}
103
104/**
105 * qdi_qc_issue - command issue
106 * @qc: command pending
107 *
108 * Called when the libata layer is about to issue a command. We wrap
109 * this interface so that we can load the correct ATA timings.
110 */
111
112static unsigned int qdi_qc_issue(struct ata_queued_cmd *qc)
113{
114 struct ata_port *ap = qc->ap;
115 struct ata_device *adev = qc->dev;
116 struct qdi_data *qdi = ap->host->private_data;
117
118 if (qdi->clock[adev->devno] != qdi->last) {
119 if (adev->pio_mode) {
120 qdi->last = qdi->clock[adev->devno];
121 outb(qdi->clock[adev->devno], qdi->timing);
122 }
123 }
124 return ata_sff_qc_issue(qc);
125}
126
127static unsigned int qdi_data_xfer(struct ata_device *dev, unsigned char *buf,
128 unsigned int buflen, int rw)
129{
130 if (ata_id_has_dword_io(dev->id)) {
131 struct ata_port *ap = dev->link->ap;
132 int slop = buflen & 3;
133
134 if (rw == READ)
135 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
136 else
137 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
138
139 if (unlikely(slop)) {
140 __le32 pad;
141 if (rw == READ) {
142 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
143 memcpy(buf + buflen - slop, &pad, slop);
144 } else {
145 memcpy(&pad, buf + buflen - slop, slop);
146 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
147 }
148 buflen += 4 - slop;
149 }
150 } else
151 buflen = ata_sff_data_xfer(dev, buf, buflen, rw);
152
153 return buflen;
154}
155
156static struct scsi_host_template qdi_sht = {
157 ATA_PIO_SHT(DRV_NAME),
158};
159
160static struct ata_port_operations qdi6500_port_ops = {
161 .inherits = &ata_sff_port_ops,
162 .qc_issue = qdi_qc_issue,
163 .sff_data_xfer = qdi_data_xfer,
164 .cable_detect = ata_cable_40wire,
165 .set_piomode = qdi6500_set_piomode,
166};
167
168static struct ata_port_operations qdi6580_port_ops = {
169 .inherits = &qdi6500_port_ops,
170 .set_piomode = qdi6580_set_piomode,
171};
172
173/**
174 * qdi_init_one - attach a qdi interface
175 * @type: Type to display
176 * @io: I/O port start
177 * @irq: interrupt line
178 * @fast: True if on a > 33Mhz VLB
179 *
180 * Register an ISA bus IDE interface. Such interfaces are PIO and we
181 * assume do not support IRQ sharing.
182 */
183
184static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
185{
186 unsigned long ctl = io + 0x206;
187 struct platform_device *pdev;
188 struct ata_host *host;
189 struct ata_port *ap;
190 void __iomem *io_addr, *ctl_addr;
191 int ret;
192
193 /*
194 * Fill in a probe structure first of all
195 */
196
197 pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
198 if (IS_ERR(pdev))
199 return PTR_ERR(pdev);
200
201 ret = -ENOMEM;
202 io_addr = devm_ioport_map(&pdev->dev, io, 8);
203 ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
204 if (!io_addr || !ctl_addr)
205 goto fail;
206
207 ret = -ENOMEM;
208 host = ata_host_alloc(&pdev->dev, 1);
209 if (!host)
210 goto fail;
211 ap = host->ports[0];
212
213 if (type == 6580) {
214 ap->ops = &qdi6580_port_ops;
215 ap->pio_mask = ATA_PIO4;
216 ap->flags |= ATA_FLAG_SLAVE_POSS;
217 } else {
218 ap->ops = &qdi6500_port_ops;
219 ap->pio_mask = ATA_PIO2; /* Actually PIO3 !IORDY is possible */
220 ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
221 }
222
223 ap->ioaddr.cmd_addr = io_addr;
224 ap->ioaddr.altstatus_addr = ctl_addr;
225 ap->ioaddr.ctl_addr = ctl_addr;
226 ata_sff_std_ports(&ap->ioaddr);
227
228 ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);
229
230 /*
231 * Hook in a private data structure per channel
232 */
233 ap->private_data = &qdi_data[nr_qdi_host];
234
235 qdi_data[nr_qdi_host].timing = port;
236 qdi_data[nr_qdi_host].fast = fast;
237 qdi_data[nr_qdi_host].platform_dev = pdev;
238
239 printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
240
241 /* activate */
242 ret = ata_host_activate(host, irq, ata_sff_interrupt, 0, &qdi_sht);
243 if (ret)
244 goto fail;
245
246 qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
247 return 0;
248
249 fail:
250 platform_device_unregister(pdev);
251 return ret;
252}
253
254/**
255 * qdi_init - attach qdi interfaces
256 *
257 * Attach qdi IDE interfaces by scanning the ports it may occupy.
258 */
259
260static __init int qdi_init(void)
261{
262 unsigned long flags;
263 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
264 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
265 static const int ide_irq[2] = { 14, 15 };
266
267 int ct = 0;
268 int i;
269
270 if (probe_qdi == 0)
271 return -ENODEV;
272
273 /*
274 * Check each possible QD65xx base address
275 */
276
277 for (i = 0; i < 2; i++) {
278 unsigned long port = qd_port[i];
279 u8 r, res;
280
281
282 if (request_region(port, 2, "pata_qdi")) {
283 /* Check for a card */
284 local_irq_save(flags);
285 r = inb_p(port);
286 outb_p(0x19, port);
287 res = inb_p(port);
288 outb_p(r, port);
289 local_irq_restore(flags);
290
291 /* Fail */
292 if (res == 0x19)
293 {
294 release_region(port, 2);
295 continue;
296 }
297
298 /* Passes the presence test */
299 r = inb_p(port + 1); /* Check port agrees with port set */
300 if ((r & 2) >> 1 != i) {
301 release_region(port, 2);
302 continue;
303 }
304
305 /* Check card type */
306 if ((r & 0xF0) == 0xC0) {
307 /* QD6500: single channel */
308 if (r & 8) {
309 /* Disabled ? */
310 release_region(port, 2);
311 continue;
312 }
313 if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
314 ct++;
315 }
316 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
317 /* QD6580: dual channel */
318 if (!request_region(port + 2 , 2, "pata_qdi"))
319 {
320 release_region(port, 2);
321 continue;
322 }
323 res = inb(port + 3);
324 if (res & 1) {
325 /* Single channel mode */
326 if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
327 ct++;
328 } else {
329 /* Dual channel mode */
330 if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
331 ct++;
332 if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
333 ct++;
334 }
335 }
336 }
337 }
338 if (ct != 0)
339 return 0;
340 return -ENODEV;
341}
342
343static __exit void qdi_exit(void)
344{
345 int i;
346
347 for (i = 0; i < nr_qdi_host; i++) {
348 ata_host_detach(qdi_host[i]);
349 /* Free the control resource. The 6580 dual channel has the resources
350 * claimed as a pair of 2 byte resources so we need no special cases...
351 */
352 release_region(qdi_data[i].timing, 2);
353 platform_device_unregister(qdi_data[i].platform_dev);
354 }
355}
356
357MODULE_AUTHOR("Alan Cox");
358MODULE_DESCRIPTION("low-level driver for qdi ATA");
359MODULE_LICENSE("GPL");
360MODULE_VERSION(DRV_VERSION);
361
362module_init(qdi_init);
363module_exit(qdi_exit);
364
365module_param(probe_qdi, int, 0);
366
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