2 * pata_qdi.c - QDI VLB ATA controllers
3 * (C) 2006 Red Hat <alan@redhat.com>
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
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
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>
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>
28 #define DRV_NAME "pata_qdi"
29 #define DRV_VERSION "0.3.1"
31 #define NR_HOST 4 /* Two 6580s */
38 struct platform_device *platform_dev;
42 static struct ata_host *qdi_host[NR_HOST];
43 static struct qdi_data qdi_data[NR_HOST];
44 static int nr_qdi_host;
47 static int probe_qdi = 1;
52 static void qdi6500_set_piomode(struct ata_port *ap, struct ata_device *adev)
55 struct qdi_data *qdi = ap->host->private_data;
59 /* Get the timing data in cycles */
60 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
63 active = 8 - FIT(t.active, 1, 8);
64 recovery = 18 - FIT(t.recover, 3, 18);
66 active = 9 - FIT(t.active, 2, 9);
67 recovery = 15 - FIT(t.recover, 0, 15);
69 timing = (recovery << 4) | active | 0x08;
71 qdi->clock[adev->devno] = timing;
73 outb(timing, qdi->timing);
76 static void qdi6580_set_piomode(struct ata_port *ap, struct ata_device *adev)
79 struct qdi_data *qdi = ap->host->private_data;
83 /* Get the timing data in cycles */
84 ata_timing_compute(adev, adev->pio_mode, &t, 30303, 1000);
87 active = 8 - FIT(t.active, 1, 8);
88 recovery = 18 - FIT(t.recover, 3, 18);
90 active = 9 - FIT(t.active, 2, 9);
91 recovery = 15 - FIT(t.recover, 0, 15);
93 timing = (recovery << 4) | active | 0x08;
95 qdi->clock[adev->devno] = timing;
97 outb(timing, qdi->timing);
100 if (adev->class != ATA_DEV_ATA)
101 outb(0x5F, (qdi->timing & 0xFFF0) + 3);
105 * qdi_qc_issue_prot - command issue
106 * @qc: command pending
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.
112 static unsigned int qdi_qc_issue_prot(struct ata_queued_cmd *qc)
114 struct ata_port *ap = qc->ap;
115 struct ata_device *adev = qc->dev;
116 struct qdi_data *qdi = ap->host->private_data;
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);
124 return ata_qc_issue_prot(qc);
127 static unsigned int qdi_data_xfer(struct ata_device *dev, unsigned char *buf,
128 unsigned int buflen, int rw)
130 if (ata_id_has_dword_io(dev->id)) {
131 struct ata_port *ap = dev->link->ap;
132 int slop = buflen & 3;
135 ioread32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
137 iowrite32_rep(ap->ioaddr.data_addr, buf, buflen >> 2);
139 if (unlikely(slop)) {
142 pad = cpu_to_le32(ioread32(ap->ioaddr.data_addr));
143 memcpy(buf + buflen - slop, &pad, slop);
145 memcpy(&pad, buf + buflen - slop, slop);
146 iowrite32(le32_to_cpu(pad), ap->ioaddr.data_addr);
151 buflen = ata_data_xfer(dev, buf, buflen, rw);
156 static struct scsi_host_template qdi_sht = {
157 ATA_PIO_SHT(DRV_NAME),
160 static struct ata_port_operations qdi6500_port_ops = {
161 .set_piomode = qdi6500_set_piomode,
163 .tf_load = ata_tf_load,
164 .tf_read = ata_tf_read,
165 .check_status = ata_check_status,
166 .exec_command = ata_exec_command,
167 .dev_select = ata_std_dev_select,
169 .freeze = ata_bmdma_freeze,
170 .thaw = ata_bmdma_thaw,
171 .error_handler = ata_bmdma_error_handler,
172 .post_internal_cmd = ata_bmdma_post_internal_cmd,
173 .cable_detect = ata_cable_40wire,
175 .qc_prep = ata_qc_prep,
176 .qc_issue = qdi_qc_issue_prot,
178 .data_xfer = qdi_data_xfer,
180 .irq_clear = ata_noop_irq_clear,
181 .irq_on = ata_irq_on,
183 .port_start = ata_sff_port_start,
186 static struct ata_port_operations qdi6580_port_ops = {
187 .set_piomode = qdi6580_set_piomode,
189 .tf_load = ata_tf_load,
190 .tf_read = ata_tf_read,
191 .check_status = ata_check_status,
192 .exec_command = ata_exec_command,
193 .dev_select = ata_std_dev_select,
195 .freeze = ata_bmdma_freeze,
196 .thaw = ata_bmdma_thaw,
197 .error_handler = ata_bmdma_error_handler,
198 .post_internal_cmd = ata_bmdma_post_internal_cmd,
199 .cable_detect = ata_cable_40wire,
201 .qc_prep = ata_qc_prep,
202 .qc_issue = qdi_qc_issue_prot,
204 .data_xfer = qdi_data_xfer,
206 .irq_clear = ata_noop_irq_clear,
207 .irq_on = ata_irq_on,
209 .port_start = ata_sff_port_start,
213 * qdi_init_one - attach a qdi interface
214 * @type: Type to display
215 * @io: I/O port start
216 * @irq: interrupt line
217 * @fast: True if on a > 33Mhz VLB
219 * Register an ISA bus IDE interface. Such interfaces are PIO and we
220 * assume do not support IRQ sharing.
223 static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast)
225 unsigned long ctl = io + 0x206;
226 struct platform_device *pdev;
227 struct ata_host *host;
229 void __iomem *io_addr, *ctl_addr;
233 * Fill in a probe structure first of all
236 pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0);
238 return PTR_ERR(pdev);
241 io_addr = devm_ioport_map(&pdev->dev, io, 8);
242 ctl_addr = devm_ioport_map(&pdev->dev, ctl, 1);
243 if (!io_addr || !ctl_addr)
247 host = ata_host_alloc(&pdev->dev, 1);
253 ap->ops = &qdi6580_port_ops;
255 ap->flags |= ATA_FLAG_SLAVE_POSS;
257 ap->ops = &qdi6500_port_ops;
258 ap->pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */
259 ap->flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_NO_IORDY;
262 ap->ioaddr.cmd_addr = io_addr;
263 ap->ioaddr.altstatus_addr = ctl_addr;
264 ap->ioaddr.ctl_addr = ctl_addr;
265 ata_std_ports(&ap->ioaddr);
267 ata_port_desc(ap, "cmd %lx ctl %lx", io, ctl);
270 * Hook in a private data structure per channel
272 ap->private_data = &qdi_data[nr_qdi_host];
274 qdi_data[nr_qdi_host].timing = port;
275 qdi_data[nr_qdi_host].fast = fast;
276 qdi_data[nr_qdi_host].platform_dev = pdev;
278 printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io);
281 ret = ata_host_activate(host, irq, ata_interrupt, 0, &qdi_sht);
285 qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev);
289 platform_device_unregister(pdev);
294 * qdi_init - attach qdi interfaces
296 * Attach qdi IDE interfaces by scanning the ports it may occupy.
299 static __init int qdi_init(void)
302 static const unsigned long qd_port[2] = { 0x30, 0xB0 };
303 static const unsigned long ide_port[2] = { 0x170, 0x1F0 };
304 static const int ide_irq[2] = { 14, 15 };
313 * Check each possible QD65xx base address
316 for (i = 0; i < 2; i++) {
317 unsigned long port = qd_port[i];
321 if (request_region(port, 2, "pata_qdi")) {
322 /* Check for a card */
323 local_irq_save(flags);
328 local_irq_restore(flags);
333 release_region(port, 2);
337 /* Passes the presence test */
338 r = inb_p(port + 1); /* Check port agrees with port set */
339 if ((r & 2) >> 1 != i) {
340 release_region(port, 2);
344 /* Check card type */
345 if ((r & 0xF0) == 0xC0) {
346 /* QD6500: single channel */
349 release_region(port, 2);
352 if (qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
355 if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) {
356 /* QD6580: dual channel */
357 if (!request_region(port + 2 , 2, "pata_qdi"))
359 release_region(port, 2);
364 /* Single channel mode */
365 if (qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04) == 0)
368 /* Dual channel mode */
369 if (qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04) == 0)
371 if (qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04) == 0)
382 static __exit void qdi_exit(void)
386 for (i = 0; i < nr_qdi_host; i++) {
387 ata_host_detach(qdi_host[i]);
388 /* Free the control resource. The 6580 dual channel has the resources
389 * claimed as a pair of 2 byte resources so we need no special cases...
391 release_region(qdi_data[i].timing, 2);
392 platform_device_unregister(qdi_data[i].platform_dev);
396 MODULE_AUTHOR("Alan Cox");
397 MODULE_DESCRIPTION("low-level driver for qdi ATA");
398 MODULE_LICENSE("GPL");
399 MODULE_VERSION(DRV_VERSION);
401 module_init(qdi_init);
402 module_exit(qdi_exit);
404 module_param(probe_qdi, int, 0);