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[IA64] update sn2_defconfig
[deliverable/linux.git] / drivers / ata / pata_qdi.c
1 /*
2 * pata_qdi.c - QDI VLB ATA controllers
3 * (C) 2006 Red Hat <alan@redhat.com>
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@fnac.net>
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
33 struct 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
42 static struct ata_host *qdi_host[NR_HOST];
43 static struct qdi_data qdi_data[NR_HOST];
44 static int nr_qdi_host;
45
46 #ifdef MODULE
47 static int probe_qdi = 1;
48 #else
49 static int probe_qdi;
50 #endif
51
52 static 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 - FIT(t.active, 1, 8);
64 recovery = 18 - FIT(t.recover, 3, 18);
65 } else {
66 active = 9 - FIT(t.active, 2, 9);
67 recovery = 15 - FIT(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
76 static 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 - FIT(t.active, 1, 8);
88 recovery = 18 - FIT(t.recover, 3, 18);
89 } else {
90 active = 9 - FIT(t.active, 2, 9);
91 recovery = 15 - FIT(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_prot - 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
112 static unsigned int qdi_qc_issue_prot(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_qc_issue_prot(qc);
125 }
126
127 static void qdi_data_xfer(struct ata_device *adev, unsigned char *buf, unsigned int buflen, int write_data)
128 {
129 struct ata_port *ap = adev->ap;
130 int slop = buflen & 3;
131
132 if (ata_id_has_dword_io(adev->id)) {
133 if (write_data)
134 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
135 else
136 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
137
138 if (unlikely(slop)) {
139 u32 pad;
140 if (write_data) {
141 memcpy(&pad, buf + buflen - slop, slop);
142 pad = le32_to_cpu(pad);
143 iowrite32(pad, ap->ioaddr.data_addr);
144 } else {
145 pad = ioread32(ap->ioaddr.data_addr);
146 pad = cpu_to_le32(pad);
147 memcpy(buf + buflen - slop, &pad, slop);
148 }
149 }
150 } else
151 ata_data_xfer(adev, buf, buflen, write_data);
152 }
153
154 static struct scsi_host_template qdi_sht = {
155 .module = THIS_MODULE,
156 .name = DRV_NAME,
157 .ioctl = ata_scsi_ioctl,
158 .queuecommand = ata_scsi_queuecmd,
159 .can_queue = ATA_DEF_QUEUE,
160 .this_id = ATA_SHT_THIS_ID,
161 .sg_tablesize = LIBATA_MAX_PRD,
162 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
163 .emulated = ATA_SHT_EMULATED,
164 .use_clustering = ATA_SHT_USE_CLUSTERING,
165 .proc_name = DRV_NAME,
166 .dma_boundary = ATA_DMA_BOUNDARY,
167 .slave_configure = ata_scsi_slave_config,
168 .slave_destroy = ata_scsi_slave_destroy,
169 .bios_param = ata_std_bios_param,
170 };
171
172 static struct ata_port_operations qdi6500_port_ops = {
173 .port_disable = ata_port_disable,
174 .set_piomode = qdi6500_set_piomode,
175
176 .tf_load = ata_tf_load,
177 .tf_read = ata_tf_read,
178 .check_status = ata_check_status,
179 .exec_command = ata_exec_command,
180 .dev_select = ata_std_dev_select,
181
182 .freeze = ata_bmdma_freeze,
183 .thaw = ata_bmdma_thaw,
184 .error_handler = ata_bmdma_error_handler,
185 .post_internal_cmd = ata_bmdma_post_internal_cmd,
186 .cable_detect = ata_cable_40wire,
187
188 .qc_prep = ata_qc_prep,
189 .qc_issue = qdi_qc_issue_prot,
190
191 .data_xfer = qdi_data_xfer,
192
193 .irq_clear = ata_bmdma_irq_clear,
194 .irq_on = ata_irq_on,
195 .irq_ack = ata_irq_ack,
196
197 .port_start = ata_port_start,
198 };
199
200 static struct ata_port_operations qdi6580_port_ops = {
201 .port_disable = ata_port_disable,
202 .set_piomode = qdi6580_set_piomode,
203
204 .tf_load = ata_tf_load,
205 .tf_read = ata_tf_read,
206 .check_status = ata_check_status,
207 .exec_command = ata_exec_command,
208 .dev_select = ata_std_dev_select,
209
210 .freeze = ata_bmdma_freeze,
211 .thaw = ata_bmdma_thaw,
212 .error_handler = ata_bmdma_error_handler,
213 .post_internal_cmd = ata_bmdma_post_internal_cmd,
214 .cable_detect = ata_cable_40wire,
215
216 .qc_prep = ata_qc_prep,
217 .qc_issue = qdi_qc_issue_prot,
218
219 .data_xfer = qdi_data_xfer,
220
221 .irq_clear = ata_bmdma_irq_clear,
222 .irq_on = ata_irq_on,
223 .irq_ack = ata_irq_ack,
224
225 .port_start = ata_port_start,
226 };
227
228 /**
229 * qdi_init_one - attach a qdi interface
230 * @type: Type to display
231 * @io: I/O port start
232 * @irq: interrupt line
233 * @fast: True if on a > 33Mhz VLB
234 *
235 * Register an ISA bus IDE interface. Such interfaces are PIO and we
236 * assume do not support IRQ sharing.
237 */
238
239 static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
240 {
241 struct platform_device *pdev;
242 struct ata_host *host;
243 struct ata_port *ap;
244 void __iomem *io_addr, *ctl_addr;
245 int ret;
246
247 /*
248 * Fill in a probe structure first of all
249 */
250
251 pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
252 if (IS_ERR(pdev))
253 return PTR_ERR(pdev);
254
255 ret = -ENOMEM;
256 io_addr = devm_ioport_map(&pdev->dev, io, 8);
257 ctl_addr = devm_ioport_map(&pdev->dev, io + 0x206, 1);
258 if (!io_addr || !ctl_addr)
259 goto fail;
260
261 ret = -ENOMEM;
262 host = ata_host_alloc(&pdev->dev, 1);
263 if (!host)
264 goto fail;
265 ap = host->ports[0];
266
267 if (type == 6580) {
268 ap->ops = &qdi6580_port_ops;
269 ap->pio_mask = 0x1F;
270 ap->flags |= ATA_FLAG_SLAVE_POSS;
271 } else {
272 ap->ops = &qdi6500_port_ops;
273 ap->pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */
274 ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
275 }
276
277 ap->ioaddr.cmd_addr = io_addr;
278 ap->ioaddr.altstatus_addr = ctl_addr;
279 ap->ioaddr.ctl_addr = ctl_addr;
280 ata_std_ports(&ap->ioaddr);
281
282 /*
283 * Hook in a private data structure per channel
284 */
285 ap->private_data = &qdi_data[nr_qdi_host];
286
287 qdi_data[nr_qdi_host].timing = port;
288 qdi_data[nr_qdi_host].fast = fast;
289 qdi_data[nr_qdi_host].platform_dev = pdev;
290
291 printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
292
293 /* activate */
294 ret = ata_host_activate(host, irq, ata_interrupt, 0, &qdi_sht);
295 if (ret)
296 goto fail;
297
298 qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
299 return 0;
300
301 fail:
302 platform_device_unregister(pdev);
303 return ret;
304 }
305
306 /**
307 * qdi_init - attach qdi interfaces
308 *
309 * Attach qdi IDE interfaces by scanning the ports it may occupy.
310 */
311
312 static __init int qdi_init(void)
313 {
314 unsigned long flags;
315 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
316 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
317 static const int ide_irq[2] = { 14, 15 };
318
319 int ct = 0;
320 int i;
321
322 if (probe_qdi == 0)
323 return -ENODEV;
324
325 /*
326 * Check each possible QD65xx base address
327 */
328
329 for (i = 0; i < 2; i++) {
330 unsigned long port = qd_port[i];
331 u8 r, res;
332
333
334 if (request_region(port, 2, "pata_qdi")) {
335 /* Check for a card */
336 local_irq_save(flags);
337 r = inb_p(port);
338 outb_p(0x19, port);
339 res = inb_p(port);
340 outb_p(r, port);
341 local_irq_restore(flags);
342
343 /* Fail */
344 if (res == 0x19)
345 {
346 release_region(port, 2);
347 continue;
348 }
349
350 /* Passes the presence test */
351 r = inb_p(port + 1); /* Check port agrees with port set */
352 if ((r & 2) >> 1 != i) {
353 release_region(port, 2);
354 continue;
355 }
356
357 /* Check card type */
358 if ((r & 0xF0) == 0xC0) {
359 /* QD6500: single channel */
360 if (r & 8) {
361 /* Disabled ? */
362 release_region(port, 2);
363 continue;
364 }
365 if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
366 ct++;
367 }
368 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
369 /* QD6580: dual channel */
370 if (!request_region(port + 2 , 2, "pata_qdi"))
371 {
372 release_region(port, 2);
373 continue;
374 }
375 res = inb(port + 3);
376 if (res & 1) {
377 /* Single channel mode */
378 if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
379 ct++;
380 } else {
381 /* Dual channel mode */
382 if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
383 ct++;
384 if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
385 ct++;
386 }
387 }
388 }
389 }
390 if (ct != 0)
391 return 0;
392 return -ENODEV;
393 }
394
395 static __exit void qdi_exit(void)
396 {
397 int i;
398
399 for (i = 0; i < nr_qdi_host; i++) {
400 ata_host_detach(qdi_host[i]);
401 /* Free the control resource. The 6580 dual channel has the resources
402 * claimed as a pair of 2 byte resources so we need no special cases...
403 */
404 release_region(qdi_data[i].timing, 2);
405 platform_device_unregister(qdi_data[i].platform_dev);
406 }
407 }
408
409 MODULE_AUTHOR("Alan Cox");
410 MODULE_DESCRIPTION("low-level driver for qdi ATA");
411 MODULE_LICENSE("GPL");
412 MODULE_VERSION(DRV_VERSION);
413
414 module_init(qdi_init);
415 module_exit(qdi_exit);
416
417 module_param(probe_qdi, int, 0);
418
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