1 #include <linux/kernel.h>
2 #include <linux/module.h>
3 #include <linux/init.h>
4 #include <linux/blkdev.h>
5 #include <scsi/scsi_host.h>
7 #include <linux/libata.h>
10 #include <asm/ecard.h>
12 #define DRV_NAME "pata_icside"
14 #define ICS_IDENT_OFFSET 0x2280
16 #define ICS_ARCIN_V5_INTRSTAT 0x0000
17 #define ICS_ARCIN_V5_INTROFFSET 0x0004
19 #define ICS_ARCIN_V6_INTROFFSET_1 0x2200
20 #define ICS_ARCIN_V6_INTRSTAT_1 0x2290
21 #define ICS_ARCIN_V6_INTROFFSET_2 0x3200
22 #define ICS_ARCIN_V6_INTRSTAT_2 0x3290
25 unsigned int dataoffset;
26 unsigned int ctrloffset;
27 unsigned int stepping;
30 static const struct portinfo pata_icside_portinfo_v5 = {
36 static const struct portinfo pata_icside_portinfo_v6_1 = {
42 static const struct portinfo pata_icside_portinfo_v6_2 = {
48 #define PATA_ICSIDE_MAX_SG 128
50 struct pata_icside_state {
51 void __iomem *irq_port;
52 void __iomem *ioc_base;
58 unsigned int speed[ATA_MAX_DEVICES];
60 struct scatterlist sg[PATA_ICSIDE_MAX_SG];
63 struct pata_icside_info {
64 struct pata_icside_state *state;
65 struct expansion_card *ec;
67 void __iomem *irqaddr;
69 const expansioncard_ops_t *irqops;
70 unsigned int mwdma_mask;
71 unsigned int nr_ports;
72 const struct portinfo *port[2];
75 #define ICS_TYPE_A3IN 0
76 #define ICS_TYPE_A3USER 1
78 #define ICS_TYPE_V5 15
79 #define ICS_TYPE_NOTYPE ((unsigned int)-1)
81 /* ---------------- Version 5 PCB Support Functions --------------------- */
82 /* Prototype: pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
83 * Purpose : enable interrupts from card
85 static void pata_icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
87 struct pata_icside_state *state = ec->irq_data;
89 writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
92 /* Prototype: pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
93 * Purpose : disable interrupts from card
95 static void pata_icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
97 struct pata_icside_state *state = ec->irq_data;
99 readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
102 static const expansioncard_ops_t pata_icside_ops_arcin_v5 = {
103 .irqenable = pata_icside_irqenable_arcin_v5,
104 .irqdisable = pata_icside_irqdisable_arcin_v5,
108 /* ---------------- Version 6 PCB Support Functions --------------------- */
109 /* Prototype: pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
110 * Purpose : enable interrupts from card
112 static void pata_icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
114 struct pata_icside_state *state = ec->irq_data;
115 void __iomem *base = state->irq_port;
117 if (!state->port[0].disabled)
118 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
119 if (!state->port[1].disabled)
120 writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
123 /* Prototype: pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
124 * Purpose : disable interrupts from card
126 static void pata_icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
128 struct pata_icside_state *state = ec->irq_data;
130 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
131 readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
134 /* Prototype: pata_icside_irqprobe(struct expansion_card *ec)
135 * Purpose : detect an active interrupt from card
137 static int pata_icside_irqpending_arcin_v6(struct expansion_card *ec)
139 struct pata_icside_state *state = ec->irq_data;
141 return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
142 readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
145 static const expansioncard_ops_t pata_icside_ops_arcin_v6 = {
146 .irqenable = pata_icside_irqenable_arcin_v6,
147 .irqdisable = pata_icside_irqdisable_arcin_v6,
148 .irqpending = pata_icside_irqpending_arcin_v6,
155 * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
156 * There is only one DMA controller per card, which means that only
157 * one drive can be accessed at one time. NOTE! We do not enforce that
158 * here, but we rely on the main IDE driver spotting that both
159 * interfaces use the same IRQ, which should guarantee this.
163 * Configure the IOMD to give the appropriate timings for the transfer
164 * mode being requested. We take the advice of the ATA standards, and
165 * calculate the cycle time based on the transfer mode, and the EIDE
166 * MW DMA specs that the drive provides in the IDENTIFY command.
168 * We have the following IOMD DMA modes to choose from:
170 * Type Active Recovery Cycle
171 * A 250 (250) 312 (550) 562 (800)
172 * B 187 (200) 250 (550) 437 (750)
173 * C 125 (125) 125 (375) 250 (500)
174 * D 62 (50) 125 (375) 187 (425)
176 * (figures in brackets are actual measured timings on DIOR/DIOW)
178 * However, we also need to take care of the read/write active and
182 * Mode Active -- Recovery -- Cycle IOMD type
183 * MW0 215 50 215 480 A
187 static void pata_icside_set_dmamode(struct ata_port *ap, struct ata_device *adev)
189 struct pata_icside_state *state = ap->host->private_data;
195 * DMA is based on a 16MHz clock
197 if (ata_timing_compute(adev, adev->dma_mode, &t, 1000, 1))
201 * Choose the IOMD cycle timing which ensure that the interface
202 * satisfies the measured active, recovery and cycle times.
204 if (t.active <= 50 && t.recover <= 375 && t.cycle <= 425)
205 iomd_type = 'D', cycle = 187;
206 else if (t.active <= 125 && t.recover <= 375 && t.cycle <= 500)
207 iomd_type = 'C', cycle = 250;
208 else if (t.active <= 200 && t.recover <= 550 && t.cycle <= 750)
209 iomd_type = 'B', cycle = 437;
211 iomd_type = 'A', cycle = 562;
213 ata_dev_printk(adev, KERN_INFO, "timings: act %dns rec %dns cyc %dns (%c)\n",
214 t.active, t.recover, t.cycle, iomd_type);
216 state->port[ap->port_no].speed[adev->devno] = cycle;
219 static void pata_icside_bmdma_setup(struct ata_queued_cmd *qc)
221 struct ata_port *ap = qc->ap;
222 struct pata_icside_state *state = ap->host->private_data;
223 struct scatterlist *sg, *rsg = state->sg;
224 unsigned int write = qc->tf.flags & ATA_TFLAG_WRITE;
227 * We are simplex; BUG if we try to fiddle with DMA
230 BUG_ON(dma_channel_active(state->dma));
233 * Copy ATAs scattered sg list into a contiguous array of sg
235 ata_for_each_sg(sg, qc) {
236 memcpy(rsg, sg, sizeof(*sg));
241 * Route the DMA signals to the correct interface
243 writeb(state->port[ap->port_no].port_sel, state->ioc_base);
245 set_dma_speed(state->dma, state->port[ap->port_no].speed[qc->dev->devno]);
246 set_dma_sg(state->dma, state->sg, rsg - state->sg);
247 set_dma_mode(state->dma, write ? DMA_MODE_WRITE : DMA_MODE_READ);
249 /* issue r/w command */
250 ap->ops->exec_command(ap, &qc->tf);
253 static void pata_icside_bmdma_start(struct ata_queued_cmd *qc)
255 struct ata_port *ap = qc->ap;
256 struct pata_icside_state *state = ap->host->private_data;
258 BUG_ON(dma_channel_active(state->dma));
259 enable_dma(state->dma);
262 static void pata_icside_bmdma_stop(struct ata_queued_cmd *qc)
264 struct ata_port *ap = qc->ap;
265 struct pata_icside_state *state = ap->host->private_data;
267 disable_dma(state->dma);
269 /* see ata_bmdma_stop */
273 static u8 pata_icside_bmdma_status(struct ata_port *ap)
275 struct pata_icside_state *state = ap->host->private_data;
276 void __iomem *irq_port;
278 irq_port = state->irq_port + (ap->port_no ? ICS_ARCIN_V6_INTRSTAT_2 :
279 ICS_ARCIN_V6_INTRSTAT_1);
281 return readb(irq_port) & 1 ? ATA_DMA_INTR : 0;
284 static int icside_dma_init(struct pata_icside_info *info)
286 struct pata_icside_state *state = info->state;
287 struct expansion_card *ec = info->ec;
290 for (i = 0; i < ATA_MAX_DEVICES; i++) {
291 state->port[0].speed[i] = 480;
292 state->port[1].speed[i] = 480;
295 if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
296 state->dma = ec->dma;
297 info->mwdma_mask = 0x07; /* MW0..2 */
304 static int pata_icside_port_start(struct ata_port *ap)
306 /* No PRD to alloc */
307 return ata_pad_alloc(ap, ap->dev);
310 static struct scsi_host_template pata_icside_sht = {
311 .module = THIS_MODULE,
313 .ioctl = ata_scsi_ioctl,
314 .queuecommand = ata_scsi_queuecmd,
315 .can_queue = ATA_DEF_QUEUE,
316 .this_id = ATA_SHT_THIS_ID,
317 .sg_tablesize = PATA_ICSIDE_MAX_SG,
318 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
319 .emulated = ATA_SHT_EMULATED,
320 .use_clustering = ATA_SHT_USE_CLUSTERING,
321 .proc_name = DRV_NAME,
322 .dma_boundary = ~0, /* no dma boundaries */
323 .slave_configure = ata_scsi_slave_config,
324 .slave_destroy = ata_scsi_slave_destroy,
325 .bios_param = ata_std_bios_param,
328 /* wish this was exported from libata-core */
329 static void ata_dummy_noret(struct ata_port *port)
334 * We need to shut down unused ports to prevent spurious interrupts.
335 * FIXME: the libata core doesn't call this function for PATA interfaces.
337 static void pata_icside_port_disable(struct ata_port *ap)
339 struct pata_icside_state *state = ap->host->private_data;
341 ata_port_printk(ap, KERN_ERR, "disabling icside port\n");
343 ata_port_disable(ap);
345 state->port[ap->port_no].disabled = 1;
347 if (state->type == ICS_TYPE_V6) {
349 * Disable interrupts from this port, otherwise we
350 * receive spurious interrupts from the floating
353 void __iomem *irq_port = state->irq_port +
354 (ap->port_no ? ICS_ARCIN_V6_INTROFFSET_2 : ICS_ARCIN_V6_INTROFFSET_1);
359 static u8 pata_icside_irq_ack(struct ata_port *ap, unsigned int chk_drq)
361 unsigned int bits = chk_drq ? ATA_BUSY | ATA_DRQ : ATA_BUSY;
364 status = ata_busy_wait(ap, bits, 1000);
367 printk(KERN_ERR "abnormal status 0x%X\n", status);
369 if (ata_msg_intr(ap))
370 printk(KERN_INFO "%s: irq ack: drv_stat 0x%X\n",
371 __FUNCTION__, status);
376 static struct ata_port_operations pata_icside_port_ops = {
377 .port_disable = pata_icside_port_disable,
379 .set_dmamode = pata_icside_set_dmamode,
381 .tf_load = ata_tf_load,
382 .tf_read = ata_tf_read,
383 .exec_command = ata_exec_command,
384 .check_status = ata_check_status,
385 .dev_select = ata_std_dev_select,
387 .cable_detect = ata_cable_40wire,
389 .bmdma_setup = pata_icside_bmdma_setup,
390 .bmdma_start = pata_icside_bmdma_start,
392 .data_xfer = ata_data_xfer_noirq,
394 /* no need to build any PRD tables for DMA */
395 .qc_prep = ata_noop_qc_prep,
396 .qc_issue = ata_qc_issue_prot,
398 .freeze = ata_bmdma_freeze,
399 .thaw = ata_bmdma_thaw,
400 .error_handler = ata_bmdma_error_handler,
401 .post_internal_cmd = pata_icside_bmdma_stop,
403 .irq_clear = ata_dummy_noret,
404 .irq_on = ata_irq_on,
405 .irq_ack = pata_icside_irq_ack,
407 .port_start = pata_icside_port_start,
409 .bmdma_stop = pata_icside_bmdma_stop,
410 .bmdma_status = pata_icside_bmdma_status,
413 static void __devinit
414 pata_icside_setup_ioaddr(struct ata_ioports *ioaddr, void __iomem *base,
415 const struct portinfo *info)
417 void __iomem *cmd = base + info->dataoffset;
419 ioaddr->cmd_addr = cmd;
420 ioaddr->data_addr = cmd + (ATA_REG_DATA << info->stepping);
421 ioaddr->error_addr = cmd + (ATA_REG_ERR << info->stepping);
422 ioaddr->feature_addr = cmd + (ATA_REG_FEATURE << info->stepping);
423 ioaddr->nsect_addr = cmd + (ATA_REG_NSECT << info->stepping);
424 ioaddr->lbal_addr = cmd + (ATA_REG_LBAL << info->stepping);
425 ioaddr->lbam_addr = cmd + (ATA_REG_LBAM << info->stepping);
426 ioaddr->lbah_addr = cmd + (ATA_REG_LBAH << info->stepping);
427 ioaddr->device_addr = cmd + (ATA_REG_DEVICE << info->stepping);
428 ioaddr->status_addr = cmd + (ATA_REG_STATUS << info->stepping);
429 ioaddr->command_addr = cmd + (ATA_REG_CMD << info->stepping);
431 ioaddr->ctl_addr = base + info->ctrloffset;
432 ioaddr->altstatus_addr = ioaddr->ctl_addr;
435 static int __devinit pata_icside_register_v5(struct pata_icside_info *info)
437 struct pata_icside_state *state = info->state;
440 base = ecardm_iomap(info->ec, ECARD_RES_MEMC, 0, 0);
444 state->irq_port = base;
447 info->irqaddr = base + ICS_ARCIN_V5_INTRSTAT;
449 info->irqops = &pata_icside_ops_arcin_v5;
451 info->port[0] = &pata_icside_portinfo_v5;
456 static int __devinit pata_icside_register_v6(struct pata_icside_info *info)
458 struct pata_icside_state *state = info->state;
459 struct expansion_card *ec = info->ec;
460 void __iomem *ioc_base, *easi_base;
461 unsigned int sel = 0;
463 ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
467 easi_base = ioc_base;
469 if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
470 easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
475 * Enable access to the EASI region.
480 writeb(sel, ioc_base);
482 state->irq_port = easi_base;
483 state->ioc_base = ioc_base;
484 state->port[0].port_sel = sel;
485 state->port[1].port_sel = sel | 1;
488 * FIXME: work around libata's aversion to calling port_disable.
489 * This permanently disables interrupts on port 0 - bad luck if
490 * you have a drive on that port.
492 state->port[0].disabled = 1;
494 info->base = easi_base;
495 info->irqops = &pata_icside_ops_arcin_v6;
497 info->port[0] = &pata_icside_portinfo_v6_1;
498 info->port[1] = &pata_icside_portinfo_v6_2;
500 return icside_dma_init(info);
503 static int __devinit pata_icside_add_ports(struct pata_icside_info *info)
505 struct expansion_card *ec = info->ec;
506 struct ata_host *host;
510 ec->irqaddr = info->irqaddr;
511 ec->irqmask = info->irqmask;
514 ecard_setirq(ec, info->irqops, info->state);
517 * Be on the safe side - disable interrupts
519 ec->ops->irqdisable(ec, ec->irq);
521 host = ata_host_alloc(&ec->dev, info->nr_ports);
525 host->private_data = info->state;
526 host->flags = ATA_HOST_SIMPLEX;
528 for (i = 0; i < info->nr_ports; i++) {
529 struct ata_port *ap = host->ports[i];
532 ap->mwdma_mask = info->mwdma_mask;
533 ap->flags |= ATA_FLAG_SLAVE_POSS;
534 ap->ops = &pata_icside_port_ops;
536 pata_icside_setup_ioaddr(&ap->ioaddr, info->base, info->port[i]);
539 return ata_host_activate(host, ec->irq, ata_interrupt, 0,
544 pata_icside_probe(struct expansion_card *ec, const struct ecard_id *id)
546 struct pata_icside_state *state;
547 struct pata_icside_info info;
551 ret = ecard_request_resources(ec);
555 state = devm_kzalloc(&ec->dev, sizeof(*state), GFP_KERNEL);
561 state->type = ICS_TYPE_NOTYPE;
564 idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
568 type = readb(idmem + ICS_IDENT_OFFSET) & 1;
569 type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
570 type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
571 type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
572 ecardm_iounmap(ec, idmem);
577 memset(&info, 0, sizeof(info));
581 switch (state->type) {
583 dev_warn(&ec->dev, "A3IN unsupported\n");
587 case ICS_TYPE_A3USER:
588 dev_warn(&ec->dev, "A3USER unsupported\n");
593 ret = pata_icside_register_v5(&info);
597 ret = pata_icside_register_v6(&info);
601 dev_warn(&ec->dev, "unknown interface type\n");
607 ret = pata_icside_add_ports(&info);
613 ecard_release_resources(ec);
618 static void pata_icside_shutdown(struct expansion_card *ec)
620 struct ata_host *host = ecard_get_drvdata(ec);
624 * Disable interrupts from this card. We need to do
625 * this before disabling EASI since we may be accessing
626 * this register via that region.
628 local_irq_save(flags);
629 ec->ops->irqdisable(ec, ec->irq);
630 local_irq_restore(flags);
633 * Reset the ROM pointer so that we can read the ROM
634 * after a soft reboot. This also disables access to
635 * the IDE taskfile via the EASI region.
638 struct pata_icside_state *state = host->private_data;
640 writeb(0, state->ioc_base);
644 static void __devexit pata_icside_remove(struct expansion_card *ec)
646 struct ata_host *host = ecard_get_drvdata(ec);
647 struct pata_icside_state *state = host->private_data;
649 ata_host_detach(host);
651 pata_icside_shutdown(ec);
654 * don't NULL out the drvdata - devres/libata wants it
655 * to free the ata_host structure.
657 if (state->dma != NO_DMA)
658 free_dma(state->dma);
660 ecard_release_resources(ec);
663 static const struct ecard_id pata_icside_ids[] = {
664 { MANU_ICS, PROD_ICS_IDE },
665 { MANU_ICS2, PROD_ICS2_IDE },
669 static struct ecard_driver pata_icside_driver = {
670 .probe = pata_icside_probe,
671 .remove = __devexit_p(pata_icside_remove),
672 .shutdown = pata_icside_shutdown,
673 .id_table = pata_icside_ids,
679 static int __init pata_icside_init(void)
681 return ecard_register_driver(&pata_icside_driver);
684 static void __exit pata_icside_exit(void)
686 ecard_remove_driver(&pata_icside_driver);
689 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
690 MODULE_LICENSE("GPL");
691 MODULE_DESCRIPTION("ICS PATA driver");
693 module_init(pata_icside_init);
694 module_exit(pata_icside_exit);