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Jeff Garzik669a5db2006-08-29 18:12:40 -04001/*
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 "0.2.4"
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;
Jeff Garzik85cd7252006-08-31 00:03:49 -040039
Jeff Garzik669a5db2006-08-29 18:12:40 -040040};
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);
Jeff Garzik85cd7252006-08-31 00:03:49 -040061
Jeff Garzik669a5db2006-08-29 18:12:40 -040062 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;
Jeff Garzik85cd7252006-08-31 00:03:49 -040070
Jeff Garzik669a5db2006-08-29 18:12:40 -040071 qdi->clock[adev->devno] = timing;
72
Jeff Garzik85cd7252006-08-31 00:03:49 -040073 outb(timing, qdi->timing);
Jeff Garzik669a5db2006-08-29 18:12:40 -040074}
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);
Jeff Garzik85cd7252006-08-31 00:03:49 -040085
Jeff Garzik669a5db2006-08-29 18:12:40 -040086 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;
Jeff Garzik85cd7252006-08-31 00:03:49 -040094
Jeff Garzik669a5db2006-08-29 18:12:40 -040095 qdi->clock[adev->devno] = timing;
96
97 outb(timing, qdi->timing);
Jeff Garzik85cd7252006-08-31 00:03:49 -040098
Jeff Garzik669a5db2006-08-29 18:12:40 -040099 /* 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
112static 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
127static 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;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400131
Jeff Garzik669a5db2006-08-29 18:12:40 -0400132 if (ata_id_has_dword_io(adev->id)) {
133 if (write_data)
Tejun Heo0d5ff562007-02-01 15:06:36 +0900134 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400135 else
Tejun Heo0d5ff562007-02-01 15:06:36 +0900136 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400137
Jeff Garzik669a5db2006-08-29 18:12:40 -0400138 if (unlikely(slop)) {
139 u32 pad;
140 if (write_data) {
141 memcpy(&pad, buf + buflen - slop, slop);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900142 pad = le32_to_cpu(pad);
143 iowrite32(pad, ap->ioaddr.data_addr);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400144 } else {
Tejun Heo0d5ff562007-02-01 15:06:36 +0900145 pad = ioread32(ap->ioaddr.data_addr);
146 pad = cpu_to_le32(pad);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400147 memcpy(buf + buflen - slop, &pad, slop);
148 }
149 }
150 } else
Tejun Heo0d5ff562007-02-01 15:06:36 +0900151 ata_data_xfer(adev, buf, buflen, write_data);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400152}
153
154static 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,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400162 .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,
Tejun Heoafdfe892006-11-29 11:26:47 +0900168 .slave_destroy = ata_scsi_slave_destroy,
Jeff Garzik669a5db2006-08-29 18:12:40 -0400169 .bios_param = ata_std_bios_param,
170};
171
172static 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,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400186
Jeff Garzik669a5db2006-08-29 18:12:40 -0400187 .qc_prep = ata_qc_prep,
188 .qc_issue = qdi_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400189
Jeff Garzik669a5db2006-08-29 18:12:40 -0400190 .data_xfer = qdi_data_xfer,
191
192 .irq_handler = ata_interrupt,
193 .irq_clear = ata_bmdma_irq_clear,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400194
Jeff Garzik669a5db2006-08-29 18:12:40 -0400195 .port_start = ata_port_start,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400196};
Jeff Garzik669a5db2006-08-29 18:12:40 -0400197
198static struct ata_port_operations qdi6580_port_ops = {
199 .port_disable = ata_port_disable,
200 .set_piomode = qdi6580_set_piomode,
201
202 .tf_load = ata_tf_load,
203 .tf_read = ata_tf_read,
204 .check_status = ata_check_status,
205 .exec_command = ata_exec_command,
206 .dev_select = ata_std_dev_select,
207
208 .freeze = ata_bmdma_freeze,
209 .thaw = ata_bmdma_thaw,
210 .error_handler = ata_bmdma_error_handler,
211 .post_internal_cmd = ata_bmdma_post_internal_cmd,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400212
Jeff Garzik669a5db2006-08-29 18:12:40 -0400213 .qc_prep = ata_qc_prep,
214 .qc_issue = qdi_qc_issue_prot,
Jeff Garzikbda30282006-09-27 05:41:13 -0400215
Jeff Garzik669a5db2006-08-29 18:12:40 -0400216 .data_xfer = qdi_data_xfer,
217
218 .irq_handler = ata_interrupt,
219 .irq_clear = ata_bmdma_irq_clear,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400220
Jeff Garzik669a5db2006-08-29 18:12:40 -0400221 .port_start = ata_port_start,
Jeff Garzik85cd7252006-08-31 00:03:49 -0400222};
Jeff Garzik669a5db2006-08-29 18:12:40 -0400223
224/**
225 * qdi_init_one - attach a qdi interface
226 * @type: Type to display
227 * @io: I/O port start
228 * @irq: interrupt line
229 * @fast: True if on a > 33Mhz VLB
230 *
231 * Register an ISA bus IDE interface. Such interfaces are PIO and we
232 * assume do not support IRQ sharing.
233 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400234
Jeff Garzik669a5db2006-08-29 18:12:40 -0400235static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
236{
237 struct ata_probe_ent ae;
238 struct platform_device *pdev;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900239 void __iomem *io_addr, *ctl_addr;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400240 int ret;
241
Jeff Garzik669a5db2006-08-29 18:12:40 -0400242 /*
243 * Fill in a probe structure first of all
244 */
245
246 pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
Akinobu Mita9825d732006-12-15 13:08:51 -0800247 if (IS_ERR(pdev))
248 return PTR_ERR(pdev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400249
Tejun Heo0d5ff562007-02-01 15:06:36 +0900250 ret = -ENOMEM;
251 io_addr = devm_ioport_map(&pdev->dev, io, 8);
252 ctl_addr = devm_ioport_map(&pdev->dev, io + 0x206, 1);
253 if (!io_addr || !ctl_addr)
254 goto fail;
255
Jeff Garzik669a5db2006-08-29 18:12:40 -0400256 memset(&ae, 0, sizeof(struct ata_probe_ent));
257 INIT_LIST_HEAD(&ae.node);
258 ae.dev = &pdev->dev;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400259
Jeff Garzik669a5db2006-08-29 18:12:40 -0400260 if (type == 6580) {
261 ae.port_ops = &qdi6580_port_ops;
262 ae.pio_mask = 0x1F;
263 } else {
264 ae.port_ops = &qdi6500_port_ops;
265 ae.pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */
266 }
Jeff Garzik85cd7252006-08-31 00:03:49 -0400267
Jeff Garzik669a5db2006-08-29 18:12:40 -0400268 ae.sht = &qdi_sht;
269 ae.n_ports = 1;
270 ae.irq = irq;
271 ae.irq_flags = 0;
272 ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900273 ae.port[0].cmd_addr = io_addr;
274 ae.port[0].altstatus_addr = ctl_addr;
275 ae.port[0].ctl_addr = ctl_addr;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400276 ata_std_ports(&ae.port[0]);
277
278 /*
279 * Hook in a private data structure per channel
280 */
281 ae.private_data = &qdi_data[nr_qdi_host];
282
283 qdi_data[nr_qdi_host].timing = port;
284 qdi_data[nr_qdi_host].fast = fast;
285 qdi_data[nr_qdi_host].platform_dev = pdev;
286
287 printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
Tejun Heo0d5ff562007-02-01 15:06:36 +0900288
289 ret = -ENODEV;
290 if (!ata_device_add(&ae))
291 goto fail;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400292
Jeff Garzik669a5db2006-08-29 18:12:40 -0400293 qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400294 return 0;
Tejun Heo0d5ff562007-02-01 15:06:36 +0900295
296 fail:
297 platform_device_unregister(pdev);
298 return ret;
Jeff Garzik669a5db2006-08-29 18:12:40 -0400299}
300
301/**
302 * qdi_init - attach qdi interfaces
303 *
304 * Attach qdi IDE interfaces by scanning the ports it may occupy.
305 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400306
Jeff Garzik669a5db2006-08-29 18:12:40 -0400307static __init int qdi_init(void)
308{
309 unsigned long flags;
310 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
311 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
312 static const int ide_irq[2] = { 14, 15 };
Jeff Garzik85cd7252006-08-31 00:03:49 -0400313
Jeff Garzik669a5db2006-08-29 18:12:40 -0400314 int ct = 0;
315 int i;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400316
Jeff Garzik669a5db2006-08-29 18:12:40 -0400317 if (probe_qdi == 0)
318 return -ENODEV;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400319
Jeff Garzik669a5db2006-08-29 18:12:40 -0400320 /*
321 * Check each possible QD65xx base address
322 */
Jeff Garzik85cd7252006-08-31 00:03:49 -0400323
Jeff Garzik669a5db2006-08-29 18:12:40 -0400324 for (i = 0; i < 2; i++) {
325 unsigned long port = qd_port[i];
326 u8 r, res;
Jeff Garzik85cd7252006-08-31 00:03:49 -0400327
328
Jeff Garzik669a5db2006-08-29 18:12:40 -0400329 if (request_region(port, 2, "pata_qdi")) {
330 /* Check for a card */
331 local_irq_save(flags);
332 r = inb_p(port);
333 outb_p(0x19, port);
334 res = inb_p(port);
335 outb_p(r, port);
336 local_irq_restore(flags);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400337
Jeff Garzik669a5db2006-08-29 18:12:40 -0400338 /* Fail */
339 if (res == 0x19)
340 {
341 release_region(port, 2);
342 continue;
343 }
Jeff Garzik85cd7252006-08-31 00:03:49 -0400344
Jeff Garzik669a5db2006-08-29 18:12:40 -0400345 /* Passes the presence test */
346 r = inb_p(port + 1); /* Check port agrees with port set */
347 if ((r & 2) >> 1 != i) {
348 release_region(port, 2);
349 continue;
350 }
351
Jeff Garzik85cd7252006-08-31 00:03:49 -0400352 /* Check card type */
Jeff Garzik669a5db2006-08-29 18:12:40 -0400353 if ((r & 0xF0) == 0xC0) {
354 /* QD6500: single channel */
355 if (r & 8) {
356 /* Disabled ? */
357 release_region(port, 2);
358 continue;
359 }
360 ct += qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
361 }
362 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
363 /* QD6580: dual channel */
364 if (!request_region(port + 2 , 2, "pata_qdi"))
365 {
366 release_region(port, 2);
367 continue;
368 }
369 res = inb(port + 3);
370 if (res & 1) {
371 /* Single channel mode */
372 ct += qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04);
373 } else {
374 /* Dual channel mode */
375 ct += qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04);
376 ct += qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04);
377 }
378 }
379 }
380 }
381 if (ct != 0)
382 return 0;
383 return -ENODEV;
384}
385
386static __exit void qdi_exit(void)
387{
388 int i;
389
390 for (i = 0; i < nr_qdi_host; i++) {
Tejun Heo24dc5f32007-01-20 16:00:28 +0900391 ata_host_detach(qdi_host[i]);
Jeff Garzik669a5db2006-08-29 18:12:40 -0400392 /* Free the control resource. The 6580 dual channel has the resources
393 * claimed as a pair of 2 byte resources so we need no special cases...
394 */
395 release_region(qdi_data[i].timing, 2);
396 platform_device_unregister(qdi_data[i].platform_dev);
Jeff Garzik85cd7252006-08-31 00:03:49 -0400397 }
Jeff Garzik669a5db2006-08-29 18:12:40 -0400398}
399
400MODULE_AUTHOR("Alan Cox");
401MODULE_DESCRIPTION("low-level driver for qdi ATA");
402MODULE_LICENSE("GPL");
403MODULE_VERSION(DRV_VERSION);
404
405module_init(qdi_init);
406module_exit(qdi_exit);
407
408module_param(probe_qdi, int, 0);
409