Commit | Line | Data |
---|---|---|
669a5db4 JG |
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 "0.2.4" | |
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; | |
85cd7251 | 39 | |
669a5db4 JG |
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); | |
85cd7251 | 61 | |
669a5db4 JG |
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; | |
85cd7251 | 70 | |
669a5db4 JG |
71 | qdi->clock[adev->devno] = timing; |
72 | ||
85cd7251 | 73 | outb(timing, qdi->timing); |
669a5db4 JG |
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); | |
85cd7251 | 85 | |
669a5db4 JG |
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; | |
85cd7251 | 94 | |
669a5db4 JG |
95 | qdi->clock[adev->devno] = timing; |
96 | ||
97 | outb(timing, qdi->timing); | |
85cd7251 | 98 | |
669a5db4 JG |
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; | |
85cd7251 | 131 | |
669a5db4 JG |
132 | if (ata_id_has_dword_io(adev->id)) { |
133 | if (write_data) | |
134 | outsl(ap->ioaddr.data_addr, buf, buflen >> 2); | |
135 | else | |
136 | insl(ap->ioaddr.data_addr, buf, buflen >> 2); | |
85cd7251 | 137 | |
669a5db4 JG |
138 | if (unlikely(slop)) { |
139 | u32 pad; | |
140 | if (write_data) { | |
141 | memcpy(&pad, buf + buflen - slop, slop); | |
142 | outl(le32_to_cpu(pad), ap->ioaddr.data_addr); | |
143 | } else { | |
144 | pad = cpu_to_le16(inl(ap->ioaddr.data_addr)); | |
145 | memcpy(buf + buflen - slop, &pad, slop); | |
146 | } | |
147 | } | |
148 | } else | |
149 | ata_pio_data_xfer(adev, buf, buflen, write_data); | |
150 | } | |
151 | ||
152 | static struct scsi_host_template qdi_sht = { | |
153 | .module = THIS_MODULE, | |
154 | .name = DRV_NAME, | |
155 | .ioctl = ata_scsi_ioctl, | |
156 | .queuecommand = ata_scsi_queuecmd, | |
157 | .can_queue = ATA_DEF_QUEUE, | |
158 | .this_id = ATA_SHT_THIS_ID, | |
159 | .sg_tablesize = LIBATA_MAX_PRD, | |
160 | .max_sectors = ATA_MAX_SECTORS, | |
161 | .cmd_per_lun = ATA_SHT_CMD_PER_LUN, | |
162 | .emulated = ATA_SHT_EMULATED, | |
163 | .use_clustering = ATA_SHT_USE_CLUSTERING, | |
164 | .proc_name = DRV_NAME, | |
165 | .dma_boundary = ATA_DMA_BOUNDARY, | |
166 | .slave_configure = ata_scsi_slave_config, | |
167 | .bios_param = ata_std_bios_param, | |
168 | }; | |
169 | ||
170 | static struct ata_port_operations qdi6500_port_ops = { | |
171 | .port_disable = ata_port_disable, | |
172 | .set_piomode = qdi6500_set_piomode, | |
173 | ||
174 | .tf_load = ata_tf_load, | |
175 | .tf_read = ata_tf_read, | |
176 | .check_status = ata_check_status, | |
177 | .exec_command = ata_exec_command, | |
178 | .dev_select = ata_std_dev_select, | |
179 | ||
180 | .freeze = ata_bmdma_freeze, | |
181 | .thaw = ata_bmdma_thaw, | |
182 | .error_handler = ata_bmdma_error_handler, | |
183 | .post_internal_cmd = ata_bmdma_post_internal_cmd, | |
85cd7251 | 184 | |
669a5db4 JG |
185 | .qc_prep = ata_qc_prep, |
186 | .qc_issue = qdi_qc_issue_prot, | |
187 | .eng_timeout = ata_eng_timeout, | |
188 | .data_xfer = qdi_data_xfer, | |
189 | ||
190 | .irq_handler = ata_interrupt, | |
191 | .irq_clear = ata_bmdma_irq_clear, | |
85cd7251 | 192 | |
669a5db4 JG |
193 | .port_start = ata_port_start, |
194 | .port_stop = ata_port_stop, | |
195 | .host_stop = ata_host_stop | |
85cd7251 | 196 | }; |
669a5db4 JG |
197 | |
198 | static 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, | |
85cd7251 | 212 | |
669a5db4 JG |
213 | .qc_prep = ata_qc_prep, |
214 | .qc_issue = qdi_qc_issue_prot, | |
215 | .eng_timeout = ata_eng_timeout, | |
216 | .data_xfer = qdi_data_xfer, | |
217 | ||
218 | .irq_handler = ata_interrupt, | |
219 | .irq_clear = ata_bmdma_irq_clear, | |
85cd7251 | 220 | |
669a5db4 JG |
221 | .port_start = ata_port_start, |
222 | .port_stop = ata_port_stop, | |
223 | .host_stop = ata_host_stop | |
85cd7251 | 224 | }; |
669a5db4 JG |
225 | |
226 | /** | |
227 | * qdi_init_one - attach a qdi interface | |
228 | * @type: Type to display | |
229 | * @io: I/O port start | |
230 | * @irq: interrupt line | |
231 | * @fast: True if on a > 33Mhz VLB | |
232 | * | |
233 | * Register an ISA bus IDE interface. Such interfaces are PIO and we | |
234 | * assume do not support IRQ sharing. | |
235 | */ | |
85cd7251 | 236 | |
669a5db4 JG |
237 | static __init int qdi_init_one(unsigned long port, int type, unsigned long io, int irq, int fast) |
238 | { | |
239 | struct ata_probe_ent ae; | |
240 | struct platform_device *pdev; | |
241 | int ret; | |
242 | ||
243 | unsigned long ctrl = io + 0x206; | |
244 | ||
245 | /* | |
246 | * Fill in a probe structure first of all | |
247 | */ | |
248 | ||
249 | pdev = platform_device_register_simple(DRV_NAME, nr_qdi_host, NULL, 0); | |
250 | if (pdev == NULL) | |
251 | return -ENOMEM; | |
85cd7251 | 252 | |
669a5db4 JG |
253 | memset(&ae, 0, sizeof(struct ata_probe_ent)); |
254 | INIT_LIST_HEAD(&ae.node); | |
255 | ae.dev = &pdev->dev; | |
85cd7251 | 256 | |
669a5db4 JG |
257 | if (type == 6580) { |
258 | ae.port_ops = &qdi6580_port_ops; | |
259 | ae.pio_mask = 0x1F; | |
260 | } else { | |
261 | ae.port_ops = &qdi6500_port_ops; | |
262 | ae.pio_mask = 0x07; /* Actually PIO3 !IORDY is possible */ | |
263 | } | |
85cd7251 | 264 | |
669a5db4 JG |
265 | ae.sht = &qdi_sht; |
266 | ae.n_ports = 1; | |
267 | ae.irq = irq; | |
268 | ae.irq_flags = 0; | |
269 | ae.port_flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST; | |
270 | ae.port[0].cmd_addr = io; | |
271 | ae.port[0].altstatus_addr = ctrl; | |
272 | ae.port[0].ctl_addr = ctrl; | |
273 | ata_std_ports(&ae.port[0]); | |
274 | ||
275 | /* | |
276 | * Hook in a private data structure per channel | |
277 | */ | |
278 | ae.private_data = &qdi_data[nr_qdi_host]; | |
279 | ||
280 | qdi_data[nr_qdi_host].timing = port; | |
281 | qdi_data[nr_qdi_host].fast = fast; | |
282 | qdi_data[nr_qdi_host].platform_dev = pdev; | |
283 | ||
284 | printk(KERN_INFO DRV_NAME": qd%d at 0x%lx.\n", type, io); | |
285 | ret = ata_device_add(&ae); | |
286 | if (ret == 0) { | |
287 | platform_device_unregister(pdev); | |
288 | return -ENODEV; | |
289 | } | |
85cd7251 | 290 | |
669a5db4 | 291 | qdi_host[nr_qdi_host++] = dev_get_drvdata(&pdev->dev); |
85cd7251 | 292 | return 0; |
669a5db4 JG |
293 | } |
294 | ||
295 | /** | |
296 | * qdi_init - attach qdi interfaces | |
297 | * | |
298 | * Attach qdi IDE interfaces by scanning the ports it may occupy. | |
299 | */ | |
85cd7251 | 300 | |
669a5db4 JG |
301 | static __init int qdi_init(void) |
302 | { | |
303 | unsigned long flags; | |
304 | static const unsigned long qd_port[2] = { 0x30, 0xB0 }; | |
305 | static const unsigned long ide_port[2] = { 0x170, 0x1F0 }; | |
306 | static const int ide_irq[2] = { 14, 15 }; | |
85cd7251 | 307 | |
669a5db4 JG |
308 | int ct = 0; |
309 | int i; | |
85cd7251 | 310 | |
669a5db4 JG |
311 | if (probe_qdi == 0) |
312 | return -ENODEV; | |
85cd7251 | 313 | |
669a5db4 JG |
314 | /* |
315 | * Check each possible QD65xx base address | |
316 | */ | |
85cd7251 | 317 | |
669a5db4 JG |
318 | for (i = 0; i < 2; i++) { |
319 | unsigned long port = qd_port[i]; | |
320 | u8 r, res; | |
85cd7251 JG |
321 | |
322 | ||
669a5db4 JG |
323 | if (request_region(port, 2, "pata_qdi")) { |
324 | /* Check for a card */ | |
325 | local_irq_save(flags); | |
326 | r = inb_p(port); | |
327 | outb_p(0x19, port); | |
328 | res = inb_p(port); | |
329 | outb_p(r, port); | |
330 | local_irq_restore(flags); | |
85cd7251 | 331 | |
669a5db4 JG |
332 | /* Fail */ |
333 | if (res == 0x19) | |
334 | { | |
335 | release_region(port, 2); | |
336 | continue; | |
337 | } | |
85cd7251 | 338 | |
669a5db4 JG |
339 | /* Passes the presence test */ |
340 | r = inb_p(port + 1); /* Check port agrees with port set */ | |
341 | if ((r & 2) >> 1 != i) { | |
342 | release_region(port, 2); | |
343 | continue; | |
344 | } | |
345 | ||
85cd7251 | 346 | /* Check card type */ |
669a5db4 JG |
347 | if ((r & 0xF0) == 0xC0) { |
348 | /* QD6500: single channel */ | |
349 | if (r & 8) { | |
350 | /* Disabled ? */ | |
351 | release_region(port, 2); | |
352 | continue; | |
353 | } | |
354 | ct += qdi_init_one(port, 6500, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04); | |
355 | } | |
356 | if (((r & 0xF0) == 0xA0) || (r & 0xF0) == 0x50) { | |
357 | /* QD6580: dual channel */ | |
358 | if (!request_region(port + 2 , 2, "pata_qdi")) | |
359 | { | |
360 | release_region(port, 2); | |
361 | continue; | |
362 | } | |
363 | res = inb(port + 3); | |
364 | if (res & 1) { | |
365 | /* Single channel mode */ | |
366 | ct += qdi_init_one(port, 6580, ide_port[r & 0x01], ide_irq[r & 0x01], r & 0x04); | |
367 | } else { | |
368 | /* Dual channel mode */ | |
369 | ct += qdi_init_one(port, 6580, 0x1F0, 14, r & 0x04); | |
370 | ct += qdi_init_one(port + 2, 6580, 0x170, 15, r & 0x04); | |
371 | } | |
372 | } | |
373 | } | |
374 | } | |
375 | if (ct != 0) | |
376 | return 0; | |
377 | return -ENODEV; | |
378 | } | |
379 | ||
380 | static __exit void qdi_exit(void) | |
381 | { | |
382 | int i; | |
383 | ||
384 | for (i = 0; i < nr_qdi_host; i++) { | |
385 | ata_host_remove(qdi_host[i]); | |
386 | /* Free the control resource. The 6580 dual channel has the resources | |
387 | * claimed as a pair of 2 byte resources so we need no special cases... | |
388 | */ | |
389 | release_region(qdi_data[i].timing, 2); | |
390 | platform_device_unregister(qdi_data[i].platform_dev); | |
85cd7251 | 391 | } |
669a5db4 JG |
392 | } |
393 | ||
394 | MODULE_AUTHOR("Alan Cox"); | |
395 | MODULE_DESCRIPTION("low-level driver for qdi ATA"); | |
396 | MODULE_LICENSE("GPL"); | |
397 | MODULE_VERSION(DRV_VERSION); | |
398 | ||
399 | module_init(qdi_init); | |
400 | module_exit(qdi_exit); | |
401 | ||
402 | module_param(probe_qdi, int, 0); | |
403 |