1 /*
2  * Copyright (c) 1996-2004 Russell King.
3  *
4  * Please note that this platform does not support 32-bit IDE IO.
5  */
6 
7 #include <linux/string.h>
8 #include <linux/module.h>
9 #include <linux/ioport.h>
10 #include <linux/slab.h>
11 #include <linux/blkdev.h>
12 #include <linux/errno.h>
13 #include <linux/ide.h>
14 #include <linux/dma-mapping.h>
15 #include <linux/device.h>
16 #include <linux/init.h>
17 #include <linux/scatterlist.h>
18 #include <linux/io.h>
19 
20 #include <asm/dma.h>
21 #include <asm/ecard.h>
22 
23 #define DRV_NAME "icside"
24 
25 #define ICS_IDENT_OFFSET		0x2280
26 
27 #define ICS_ARCIN_V5_INTRSTAT		0x0000
28 #define ICS_ARCIN_V5_INTROFFSET		0x0004
29 #define ICS_ARCIN_V5_IDEOFFSET		0x2800
30 #define ICS_ARCIN_V5_IDEALTOFFSET	0x2b80
31 #define ICS_ARCIN_V5_IDESTEPPING	6
32 
33 #define ICS_ARCIN_V6_IDEOFFSET_1	0x2000
34 #define ICS_ARCIN_V6_INTROFFSET_1	0x2200
35 #define ICS_ARCIN_V6_INTRSTAT_1		0x2290
36 #define ICS_ARCIN_V6_IDEALTOFFSET_1	0x2380
37 #define ICS_ARCIN_V6_IDEOFFSET_2	0x3000
38 #define ICS_ARCIN_V6_INTROFFSET_2	0x3200
39 #define ICS_ARCIN_V6_INTRSTAT_2		0x3290
40 #define ICS_ARCIN_V6_IDEALTOFFSET_2	0x3380
41 #define ICS_ARCIN_V6_IDESTEPPING	6
42 
43 struct cardinfo {
44 	unsigned int dataoffset;
45 	unsigned int ctrloffset;
46 	unsigned int stepping;
47 };
48 
49 static struct cardinfo icside_cardinfo_v5 = {
50 	.dataoffset	= ICS_ARCIN_V5_IDEOFFSET,
51 	.ctrloffset	= ICS_ARCIN_V5_IDEALTOFFSET,
52 	.stepping	= ICS_ARCIN_V5_IDESTEPPING,
53 };
54 
55 static struct cardinfo icside_cardinfo_v6_1 = {
56 	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_1,
57 	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_1,
58 	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
59 };
60 
61 static struct cardinfo icside_cardinfo_v6_2 = {
62 	.dataoffset	= ICS_ARCIN_V6_IDEOFFSET_2,
63 	.ctrloffset	= ICS_ARCIN_V6_IDEALTOFFSET_2,
64 	.stepping	= ICS_ARCIN_V6_IDESTEPPING,
65 };
66 
67 struct icside_state {
68 	unsigned int channel;
69 	unsigned int enabled;
70 	void __iomem *irq_port;
71 	void __iomem *ioc_base;
72 	unsigned int sel;
73 	unsigned int type;
74 	struct ide_host *host;
75 };
76 
77 #define ICS_TYPE_A3IN	0
78 #define ICS_TYPE_A3USER	1
79 #define ICS_TYPE_V6	3
80 #define ICS_TYPE_V5	15
81 #define ICS_TYPE_NOTYPE	((unsigned int)-1)
82 
83 /* ---------------- Version 5 PCB Support Functions --------------------- */
84 /* Prototype: icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
85  * Purpose  : enable interrupts from card
86  */
icside_irqenable_arcin_v5(struct expansion_card * ec,int irqnr)87 static void icside_irqenable_arcin_v5 (struct expansion_card *ec, int irqnr)
88 {
89 	struct icside_state *state = ec->irq_data;
90 
91 	writeb(0, state->irq_port + ICS_ARCIN_V5_INTROFFSET);
92 }
93 
94 /* Prototype: icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
95  * Purpose  : disable interrupts from card
96  */
icside_irqdisable_arcin_v5(struct expansion_card * ec,int irqnr)97 static void icside_irqdisable_arcin_v5 (struct expansion_card *ec, int irqnr)
98 {
99 	struct icside_state *state = ec->irq_data;
100 
101 	readb(state->irq_port + ICS_ARCIN_V5_INTROFFSET);
102 }
103 
104 static const expansioncard_ops_t icside_ops_arcin_v5 = {
105 	.irqenable	= icside_irqenable_arcin_v5,
106 	.irqdisable	= icside_irqdisable_arcin_v5,
107 };
108 
109 
110 /* ---------------- Version 6 PCB Support Functions --------------------- */
111 /* Prototype: icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
112  * Purpose  : enable interrupts from card
113  */
icside_irqenable_arcin_v6(struct expansion_card * ec,int irqnr)114 static void icside_irqenable_arcin_v6 (struct expansion_card *ec, int irqnr)
115 {
116 	struct icside_state *state = ec->irq_data;
117 	void __iomem *base = state->irq_port;
118 
119 	state->enabled = 1;
120 
121 	switch (state->channel) {
122 	case 0:
123 		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_1);
124 		readb(base + ICS_ARCIN_V6_INTROFFSET_2);
125 		break;
126 	case 1:
127 		writeb(0, base + ICS_ARCIN_V6_INTROFFSET_2);
128 		readb(base + ICS_ARCIN_V6_INTROFFSET_1);
129 		break;
130 	}
131 }
132 
133 /* Prototype: icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
134  * Purpose  : disable interrupts from card
135  */
icside_irqdisable_arcin_v6(struct expansion_card * ec,int irqnr)136 static void icside_irqdisable_arcin_v6 (struct expansion_card *ec, int irqnr)
137 {
138 	struct icside_state *state = ec->irq_data;
139 
140 	state->enabled = 0;
141 
142 	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
143 	readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
144 }
145 
146 /* Prototype: icside_irqprobe(struct expansion_card *ec)
147  * Purpose  : detect an active interrupt from card
148  */
icside_irqpending_arcin_v6(struct expansion_card * ec)149 static int icside_irqpending_arcin_v6(struct expansion_card *ec)
150 {
151 	struct icside_state *state = ec->irq_data;
152 
153 	return readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_1) & 1 ||
154 	       readb(state->irq_port + ICS_ARCIN_V6_INTRSTAT_2) & 1;
155 }
156 
157 static const expansioncard_ops_t icside_ops_arcin_v6 = {
158 	.irqenable	= icside_irqenable_arcin_v6,
159 	.irqdisable	= icside_irqdisable_arcin_v6,
160 	.irqpending	= icside_irqpending_arcin_v6,
161 };
162 
163 /*
164  * Handle routing of interrupts.  This is called before
165  * we write the command to the drive.
166  */
icside_maskproc(ide_drive_t * drive,int mask)167 static void icside_maskproc(ide_drive_t *drive, int mask)
168 {
169 	ide_hwif_t *hwif = drive->hwif;
170 	struct expansion_card *ec = ECARD_DEV(hwif->dev);
171 	struct icside_state *state = ecard_get_drvdata(ec);
172 	unsigned long flags;
173 
174 	local_irq_save(flags);
175 
176 	state->channel = hwif->channel;
177 
178 	if (state->enabled && !mask) {
179 		switch (hwif->channel) {
180 		case 0:
181 			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
182 			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
183 			break;
184 		case 1:
185 			writeb(0, state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
186 			readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
187 			break;
188 		}
189 	} else {
190 		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_2);
191 		readb(state->irq_port + ICS_ARCIN_V6_INTROFFSET_1);
192 	}
193 
194 	local_irq_restore(flags);
195 }
196 
197 static const struct ide_port_ops icside_v6_no_dma_port_ops = {
198 	.maskproc		= icside_maskproc,
199 };
200 
201 #ifdef CONFIG_BLK_DEV_IDEDMA_ICS
202 /*
203  * SG-DMA support.
204  *
205  * Similar to the BM-DMA, but we use the RiscPCs IOMD DMA controllers.
206  * There is only one DMA controller per card, which means that only
207  * one drive can be accessed at one time.  NOTE! We do not enforce that
208  * here, but we rely on the main IDE driver spotting that both
209  * interfaces use the same IRQ, which should guarantee this.
210  */
211 
212 /*
213  * Configure the IOMD to give the appropriate timings for the transfer
214  * mode being requested.  We take the advice of the ATA standards, and
215  * calculate the cycle time based on the transfer mode, and the EIDE
216  * MW DMA specs that the drive provides in the IDENTIFY command.
217  *
218  * We have the following IOMD DMA modes to choose from:
219  *
220  *	Type	Active		Recovery	Cycle
221  *	A	250 (250)	312 (550)	562 (800)
222  *	B	187		250		437
223  *	C	125 (125)	125 (375)	250 (500)
224  *	D	62		125		187
225  *
226  * (figures in brackets are actual measured timings)
227  *
228  * However, we also need to take care of the read/write active and
229  * recovery timings:
230  *
231  *			Read	Write
232  *  	Mode	Active	-- Recovery --	Cycle	IOMD type
233  *	MW0	215	50	215	480	A
234  *	MW1	80	50	50	150	C
235  *	MW2	70	25	25	120	C
236  */
icside_set_dma_mode(ide_hwif_t * hwif,ide_drive_t * drive)237 static void icside_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
238 {
239 	unsigned long cycle_time;
240 	int use_dma_info = 0;
241 	const u8 xfer_mode = drive->dma_mode;
242 
243 	switch (xfer_mode) {
244 	case XFER_MW_DMA_2:
245 		cycle_time = 250;
246 		use_dma_info = 1;
247 		break;
248 
249 	case XFER_MW_DMA_1:
250 		cycle_time = 250;
251 		use_dma_info = 1;
252 		break;
253 
254 	case XFER_MW_DMA_0:
255 		cycle_time = 480;
256 		break;
257 
258 	case XFER_SW_DMA_2:
259 	case XFER_SW_DMA_1:
260 	case XFER_SW_DMA_0:
261 		cycle_time = 480;
262 		break;
263 	}
264 
265 	/*
266 	 * If we're going to be doing MW_DMA_1 or MW_DMA_2, we should
267 	 * take care to note the values in the ID...
268 	 */
269 	if (use_dma_info && drive->id[ATA_ID_EIDE_DMA_TIME] > cycle_time)
270 		cycle_time = drive->id[ATA_ID_EIDE_DMA_TIME];
271 
272 	ide_set_drivedata(drive, (void *)cycle_time);
273 
274 	printk("%s: %s selected (peak %dMB/s)\n", drive->name,
275 		ide_xfer_verbose(xfer_mode),
276 		2000 / (unsigned long)ide_get_drivedata(drive));
277 }
278 
279 static const struct ide_port_ops icside_v6_port_ops = {
280 	.set_dma_mode		= icside_set_dma_mode,
281 	.maskproc		= icside_maskproc,
282 };
283 
icside_dma_host_set(ide_drive_t * drive,int on)284 static void icside_dma_host_set(ide_drive_t *drive, int on)
285 {
286 }
287 
icside_dma_end(ide_drive_t * drive)288 static int icside_dma_end(ide_drive_t *drive)
289 {
290 	ide_hwif_t *hwif = drive->hwif;
291 	struct expansion_card *ec = ECARD_DEV(hwif->dev);
292 
293 	disable_dma(ec->dma);
294 
295 	return get_dma_residue(ec->dma) != 0;
296 }
297 
icside_dma_start(ide_drive_t * drive)298 static void icside_dma_start(ide_drive_t *drive)
299 {
300 	ide_hwif_t *hwif = drive->hwif;
301 	struct expansion_card *ec = ECARD_DEV(hwif->dev);
302 
303 	/* We can not enable DMA on both channels simultaneously. */
304 	BUG_ON(dma_channel_active(ec->dma));
305 	enable_dma(ec->dma);
306 }
307 
icside_dma_setup(ide_drive_t * drive,struct ide_cmd * cmd)308 static int icside_dma_setup(ide_drive_t *drive, struct ide_cmd *cmd)
309 {
310 	ide_hwif_t *hwif = drive->hwif;
311 	struct expansion_card *ec = ECARD_DEV(hwif->dev);
312 	struct icside_state *state = ecard_get_drvdata(ec);
313 	unsigned int dma_mode;
314 
315 	if (cmd->tf_flags & IDE_TFLAG_WRITE)
316 		dma_mode = DMA_MODE_WRITE;
317 	else
318 		dma_mode = DMA_MODE_READ;
319 
320 	/*
321 	 * We can not enable DMA on both channels.
322 	 */
323 	BUG_ON(dma_channel_active(ec->dma));
324 
325 	/*
326 	 * Ensure that we have the right interrupt routed.
327 	 */
328 	icside_maskproc(drive, 0);
329 
330 	/*
331 	 * Route the DMA signals to the correct interface.
332 	 */
333 	writeb(state->sel | hwif->channel, state->ioc_base);
334 
335 	/*
336 	 * Select the correct timing for this drive.
337 	 */
338 	set_dma_speed(ec->dma, (unsigned long)ide_get_drivedata(drive));
339 
340 	/*
341 	 * Tell the DMA engine about the SG table and
342 	 * data direction.
343 	 */
344 	set_dma_sg(ec->dma, hwif->sg_table, cmd->sg_nents);
345 	set_dma_mode(ec->dma, dma_mode);
346 
347 	return 0;
348 }
349 
icside_dma_test_irq(ide_drive_t * drive)350 static int icside_dma_test_irq(ide_drive_t *drive)
351 {
352 	ide_hwif_t *hwif = drive->hwif;
353 	struct expansion_card *ec = ECARD_DEV(hwif->dev);
354 	struct icside_state *state = ecard_get_drvdata(ec);
355 
356 	return readb(state->irq_port +
357 		     (hwif->channel ?
358 			ICS_ARCIN_V6_INTRSTAT_2 :
359 			ICS_ARCIN_V6_INTRSTAT_1)) & 1;
360 }
361 
icside_dma_init(ide_hwif_t * hwif,const struct ide_port_info * d)362 static int icside_dma_init(ide_hwif_t *hwif, const struct ide_port_info *d)
363 {
364 	hwif->dmatable_cpu	= NULL;
365 	hwif->dmatable_dma	= 0;
366 
367 	return 0;
368 }
369 
370 static const struct ide_dma_ops icside_v6_dma_ops = {
371 	.dma_host_set		= icside_dma_host_set,
372 	.dma_setup		= icside_dma_setup,
373 	.dma_start		= icside_dma_start,
374 	.dma_end		= icside_dma_end,
375 	.dma_test_irq		= icside_dma_test_irq,
376 	.dma_lost_irq		= ide_dma_lost_irq,
377 };
378 #else
379 #define icside_v6_dma_ops NULL
380 #endif
381 
icside_dma_off_init(ide_hwif_t * hwif,const struct ide_port_info * d)382 static int icside_dma_off_init(ide_hwif_t *hwif, const struct ide_port_info *d)
383 {
384 	return -EOPNOTSUPP;
385 }
386 
icside_setup_ports(struct ide_hw * hw,void __iomem * base,struct cardinfo * info,struct expansion_card * ec)387 static void icside_setup_ports(struct ide_hw *hw, void __iomem *base,
388 			       struct cardinfo *info, struct expansion_card *ec)
389 {
390 	unsigned long port = (unsigned long)base + info->dataoffset;
391 
392 	hw->io_ports.data_addr	 = port;
393 	hw->io_ports.error_addr	 = port + (1 << info->stepping);
394 	hw->io_ports.nsect_addr	 = port + (2 << info->stepping);
395 	hw->io_ports.lbal_addr	 = port + (3 << info->stepping);
396 	hw->io_ports.lbam_addr	 = port + (4 << info->stepping);
397 	hw->io_ports.lbah_addr	 = port + (5 << info->stepping);
398 	hw->io_ports.device_addr = port + (6 << info->stepping);
399 	hw->io_ports.status_addr = port + (7 << info->stepping);
400 	hw->io_ports.ctl_addr	 = (unsigned long)base + info->ctrloffset;
401 
402 	hw->irq = ec->irq;
403 	hw->dev = &ec->dev;
404 }
405 
406 static const struct ide_port_info icside_v5_port_info = {
407 	.host_flags		= IDE_HFLAG_NO_DMA,
408 	.chipset		= ide_acorn,
409 };
410 
411 static int __devinit
icside_register_v5(struct icside_state * state,struct expansion_card * ec)412 icside_register_v5(struct icside_state *state, struct expansion_card *ec)
413 {
414 	void __iomem *base;
415 	struct ide_host *host;
416 	struct ide_hw hw, *hws[] = { &hw };
417 	int ret;
418 
419 	base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0);
420 	if (!base)
421 		return -ENOMEM;
422 
423 	state->irq_port = base;
424 
425 	ec->irqaddr  = base + ICS_ARCIN_V5_INTRSTAT;
426 	ec->irqmask  = 1;
427 
428 	ecard_setirq(ec, &icside_ops_arcin_v5, state);
429 
430 	/*
431 	 * Be on the safe side - disable interrupts
432 	 */
433 	icside_irqdisable_arcin_v5(ec, 0);
434 
435 	icside_setup_ports(&hw, base, &icside_cardinfo_v5, ec);
436 
437 	host = ide_host_alloc(&icside_v5_port_info, hws, 1);
438 	if (host == NULL)
439 		return -ENODEV;
440 
441 	state->host = host;
442 
443 	ecard_set_drvdata(ec, state);
444 
445 	ret = ide_host_register(host, &icside_v5_port_info, hws);
446 	if (ret)
447 		goto err_free;
448 
449 	return 0;
450 err_free:
451 	ide_host_free(host);
452 	ecard_set_drvdata(ec, NULL);
453 	return ret;
454 }
455 
456 static const struct ide_port_info icside_v6_port_info __initdata = {
457 	.init_dma		= icside_dma_off_init,
458 	.port_ops		= &icside_v6_no_dma_port_ops,
459 	.dma_ops		= &icside_v6_dma_ops,
460 	.host_flags		= IDE_HFLAG_SERIALIZE | IDE_HFLAG_MMIO,
461 	.mwdma_mask		= ATA_MWDMA2,
462 	.swdma_mask		= ATA_SWDMA2,
463 	.chipset		= ide_acorn,
464 };
465 
466 static int __devinit
icside_register_v6(struct icside_state * state,struct expansion_card * ec)467 icside_register_v6(struct icside_state *state, struct expansion_card *ec)
468 {
469 	void __iomem *ioc_base, *easi_base;
470 	struct ide_host *host;
471 	unsigned int sel = 0;
472 	int ret;
473 	struct ide_hw hw[2], *hws[] = { &hw[0], &hw[1] };
474 	struct ide_port_info d = icside_v6_port_info;
475 
476 	ioc_base = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
477 	if (!ioc_base) {
478 		ret = -ENOMEM;
479 		goto out;
480 	}
481 
482 	easi_base = ioc_base;
483 
484 	if (ecard_resource_flags(ec, ECARD_RES_EASI)) {
485 		easi_base = ecardm_iomap(ec, ECARD_RES_EASI, 0, 0);
486 		if (!easi_base) {
487 			ret = -ENOMEM;
488 			goto out;
489 		}
490 
491 		/*
492 		 * Enable access to the EASI region.
493 		 */
494 		sel = 1 << 5;
495 	}
496 
497 	writeb(sel, ioc_base);
498 
499 	ecard_setirq(ec, &icside_ops_arcin_v6, state);
500 
501 	state->irq_port   = easi_base;
502 	state->ioc_base   = ioc_base;
503 	state->sel	  = sel;
504 
505 	/*
506 	 * Be on the safe side - disable interrupts
507 	 */
508 	icside_irqdisable_arcin_v6(ec, 0);
509 
510 	icside_setup_ports(&hw[0], easi_base, &icside_cardinfo_v6_1, ec);
511 	icside_setup_ports(&hw[1], easi_base, &icside_cardinfo_v6_2, ec);
512 
513 	host = ide_host_alloc(&d, hws, 2);
514 	if (host == NULL)
515 		return -ENODEV;
516 
517 	state->host = host;
518 
519 	ecard_set_drvdata(ec, state);
520 
521 	if (ec->dma != NO_DMA && !request_dma(ec->dma, DRV_NAME)) {
522 		d.init_dma = icside_dma_init;
523 		d.port_ops = &icside_v6_port_ops;
524 	} else
525 		d.dma_ops = NULL;
526 
527 	ret = ide_host_register(host, &d, hws);
528 	if (ret)
529 		goto err_free;
530 
531 	return 0;
532 err_free:
533 	ide_host_free(host);
534 	if (d.dma_ops)
535 		free_dma(ec->dma);
536 	ecard_set_drvdata(ec, NULL);
537 out:
538 	return ret;
539 }
540 
541 static int __devinit
icside_probe(struct expansion_card * ec,const struct ecard_id * id)542 icside_probe(struct expansion_card *ec, const struct ecard_id *id)
543 {
544 	struct icside_state *state;
545 	void __iomem *idmem;
546 	int ret;
547 
548 	ret = ecard_request_resources(ec);
549 	if (ret)
550 		goto out;
551 
552 	state = kzalloc(sizeof(struct icside_state), GFP_KERNEL);
553 	if (!state) {
554 		ret = -ENOMEM;
555 		goto release;
556 	}
557 
558 	state->type	= ICS_TYPE_NOTYPE;
559 
560 	idmem = ecardm_iomap(ec, ECARD_RES_IOCFAST, 0, 0);
561 	if (idmem) {
562 		unsigned int type;
563 
564 		type = readb(idmem + ICS_IDENT_OFFSET) & 1;
565 		type |= (readb(idmem + ICS_IDENT_OFFSET + 4) & 1) << 1;
566 		type |= (readb(idmem + ICS_IDENT_OFFSET + 8) & 1) << 2;
567 		type |= (readb(idmem + ICS_IDENT_OFFSET + 12) & 1) << 3;
568 		ecardm_iounmap(ec, idmem);
569 
570 		state->type = type;
571 	}
572 
573 	switch (state->type) {
574 	case ICS_TYPE_A3IN:
575 		dev_warn(&ec->dev, "A3IN unsupported\n");
576 		ret = -ENODEV;
577 		break;
578 
579 	case ICS_TYPE_A3USER:
580 		dev_warn(&ec->dev, "A3USER unsupported\n");
581 		ret = -ENODEV;
582 		break;
583 
584 	case ICS_TYPE_V5:
585 		ret = icside_register_v5(state, ec);
586 		break;
587 
588 	case ICS_TYPE_V6:
589 		ret = icside_register_v6(state, ec);
590 		break;
591 
592 	default:
593 		dev_warn(&ec->dev, "unknown interface type\n");
594 		ret = -ENODEV;
595 		break;
596 	}
597 
598 	if (ret == 0)
599 		goto out;
600 
601 	kfree(state);
602  release:
603 	ecard_release_resources(ec);
604  out:
605 	return ret;
606 }
607 
icside_remove(struct expansion_card * ec)608 static void __devexit icside_remove(struct expansion_card *ec)
609 {
610 	struct icside_state *state = ecard_get_drvdata(ec);
611 
612 	switch (state->type) {
613 	case ICS_TYPE_V5:
614 		/* FIXME: tell IDE to stop using the interface */
615 
616 		/* Disable interrupts */
617 		icside_irqdisable_arcin_v5(ec, 0);
618 		break;
619 
620 	case ICS_TYPE_V6:
621 		/* FIXME: tell IDE to stop using the interface */
622 		if (ec->dma != NO_DMA)
623 			free_dma(ec->dma);
624 
625 		/* Disable interrupts */
626 		icside_irqdisable_arcin_v6(ec, 0);
627 
628 		/* Reset the ROM pointer/EASI selection */
629 		writeb(0, state->ioc_base);
630 		break;
631 	}
632 
633 	ecard_set_drvdata(ec, NULL);
634 
635 	kfree(state);
636 	ecard_release_resources(ec);
637 }
638 
icside_shutdown(struct expansion_card * ec)639 static void icside_shutdown(struct expansion_card *ec)
640 {
641 	struct icside_state *state = ecard_get_drvdata(ec);
642 	unsigned long flags;
643 
644 	/*
645 	 * Disable interrupts from this card.  We need to do
646 	 * this before disabling EASI since we may be accessing
647 	 * this register via that region.
648 	 */
649 	local_irq_save(flags);
650 	ec->ops->irqdisable(ec, 0);
651 	local_irq_restore(flags);
652 
653 	/*
654 	 * Reset the ROM pointer so that we can read the ROM
655 	 * after a soft reboot.  This also disables access to
656 	 * the IDE taskfile via the EASI region.
657 	 */
658 	if (state->ioc_base)
659 		writeb(0, state->ioc_base);
660 }
661 
662 static const struct ecard_id icside_ids[] = {
663 	{ MANU_ICS,  PROD_ICS_IDE  },
664 	{ MANU_ICS2, PROD_ICS2_IDE },
665 	{ 0xffff, 0xffff }
666 };
667 
668 static struct ecard_driver icside_driver = {
669 	.probe		= icside_probe,
670 	.remove		= __devexit_p(icside_remove),
671 	.shutdown	= icside_shutdown,
672 	.id_table	= icside_ids,
673 	.drv = {
674 		.name	= "icside",
675 	},
676 };
677 
icside_init(void)678 static int __init icside_init(void)
679 {
680 	return ecard_register_driver(&icside_driver);
681 }
682 
icside_exit(void)683 static void __exit icside_exit(void)
684 {
685 	ecard_remove_driver(&icside_driver);
686 }
687 
688 MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
689 MODULE_LICENSE("GPL");
690 MODULE_DESCRIPTION("ICS IDE driver");
691 
692 module_init(icside_init);
693 module_exit(icside_exit);
694