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[ARM] Remove clk_use()/clk_unuse()
[linux-2.6/kvm.git] / drivers / mtd / nand / s3c2410.c
blobb796a9a6b924ac842bc8f13687049ec3f8ac1dfd
1 /* linux/drivers/mtd/nand/s3c2410.c
2 *
3 * Copyright (c) 2004,2005 Simtec Electronics
4 * http://www.simtec.co.uk/products/SWLINUX/
5 * Ben Dooks <ben@simtec.co.uk>
6 *
7 * Samsung S3C2410/S3C240 NAND driver
8 *
9 * Changelog:
10 * 21-Sep-2004 BJD Initial version
11 * 23-Sep-2004 BJD Mulitple device support
12 * 28-Sep-2004 BJD Fixed ECC placement for Hardware mode
13 * 12-Oct-2004 BJD Fixed errors in use of platform data
14 * 18-Feb-2005 BJD Fix sparse errors
15 * 14-Mar-2005 BJD Applied tglx's code reduction patch
16 * 02-May-2005 BJD Fixed s3c2440 support
17 * 02-May-2005 BJD Reduced hwcontrol decode
18 * 20-Jun-2005 BJD Updated s3c2440 support, fixed timing bug
19 * 08-Jul-2005 BJD Fix OOPS when no platform data supplied
20 * 20-Oct-2005 BJD Fix timing calculation bug
21 *
22 * $Id: s3c2410.c,v 1.20 2005/11/07 11:14:31 gleixner Exp $
23 *
24 * This program is free software; you can redistribute it and/or modify
25 * it under the terms of the GNU General Public License as published by
26 * the Free Software Foundation; either version 2 of the License, or
27 * (at your option) any later version.
28 *
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 * GNU General Public License for more details.
33 *
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
37 */
38
39 #include <config/mtd/nand/s3c2410/hwecc.h>
40 #include <config/mtd/nand/s3c2410/debug.h>
41
42 #ifdef CONFIG_MTD_NAND_S3C2410_DEBUG
43 #define DEBUG
44 #endif
45
46 #include <linux/module.h>
47 #include <linux/types.h>
48 #include <linux/init.h>
49 #include <linux/kernel.h>
50 #include <linux/string.h>
51 #include <linux/ioport.h>
52 #include <linux/platform_device.h>
53 #include <linux/delay.h>
54 #include <linux/err.h>
55 #include <linux/slab.h>
56
57 #include <linux/mtd/mtd.h>
58 #include <linux/mtd/nand.h>
59 #include <linux/mtd/nand_ecc.h>
60 #include <linux/mtd/partitions.h>
61
62 #include <asm/io.h>
63 #include <asm/hardware/clock.h>
64
65 #include <asm/arch/regs-nand.h>
66 #include <asm/arch/nand.h>
67
68 #define PFX "s3c2410-nand: "
69
70 #ifdef CONFIG_MTD_NAND_S3C2410_HWECC
71 static int hardware_ecc = 1;
72 #else
73 static int hardware_ecc = 0;
74 #endif
75
76 /* new oob placement block for use with hardware ecc generation
77 */
78
79 static struct nand_oobinfo nand_hw_eccoob = {
80 .useecc = MTD_NANDECC_AUTOPLACE,
81 .eccbytes = 3,
82 .eccpos = {0, 1, 2 },
83 .oobfree = { {8, 8} }
84 };
85
86 /* controller and mtd information */
87
88 struct s3c2410_nand_info;
89
90 struct s3c2410_nand_mtd {
91 struct mtd_info mtd;
92 struct nand_chip chip;
93 struct s3c2410_nand_set *set;
94 struct s3c2410_nand_info *info;
95 int scan_res;
96 };
97
98 /* overview of the s3c2410 nand state */
99
100 struct s3c2410_nand_info {
101 /* mtd info */
102 struct nand_hw_control controller;
103 struct s3c2410_nand_mtd *mtds;
104 struct s3c2410_platform_nand *platform;
105
106 /* device info */
107 struct device *device;
108 struct resource *area;
109 struct clk *clk;
110 void __iomem *regs;
111 int mtd_count;
112
113 unsigned char is_s3c2440;
114 };
115
116 /* conversion functions */
117
118 static struct s3c2410_nand_mtd *s3c2410_nand_mtd_toours(struct mtd_info *mtd)
119 {
120 return container_of(mtd, struct s3c2410_nand_mtd, mtd);
121 }
122
123 static struct s3c2410_nand_info *s3c2410_nand_mtd_toinfo(struct mtd_info *mtd)
124 {
125 return s3c2410_nand_mtd_toours(mtd)->info;
126 }
127
128 static struct s3c2410_nand_info *to_nand_info(struct platform_device *dev)
129 {
130 return platform_get_drvdata(dev);
131 }
132
133 static struct s3c2410_platform_nand *to_nand_plat(struct platform_device *dev)
134 {
135 return dev->dev.platform_data;
136 }
137
138 /* timing calculations */
139
140 #define NS_IN_KHZ 1000000
141
142 static int s3c2410_nand_calc_rate(int wanted, unsigned long clk, int max)
143 {
144 int result;
145
146 result = (wanted * clk) / NS_IN_KHZ;
147 result++;
148
149 pr_debug("result %d from %ld, %d\n", result, clk, wanted);
150
151 if (result > max) {
152 printk("%d ns is too big for current clock rate %ld\n",
153 wanted, clk);
154 return -1;
155 }
156
157 if (result < 1)
158 result = 1;
159
160 return result;
161 }
162
163 #define to_ns(ticks,clk) (((ticks) * NS_IN_KHZ) / (unsigned int)(clk))
164
165 /* controller setup */
166
167 static int s3c2410_nand_inithw(struct s3c2410_nand_info *info,
168 struct platform_device *pdev)
169 {
170 struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
171 unsigned long clkrate = clk_get_rate(info->clk);
172 int tacls, twrph0, twrph1;
173 unsigned long cfg;
174
175 /* calculate the timing information for the controller */
176
177 clkrate /= 1000; /* turn clock into kHz for ease of use */
178
179 if (plat != NULL) {
180 tacls = s3c2410_nand_calc_rate(plat->tacls, clkrate, 4);
181 twrph0 = s3c2410_nand_calc_rate(plat->twrph0, clkrate, 8);
182 twrph1 = s3c2410_nand_calc_rate(plat->twrph1, clkrate, 8);
183 } else {
184 /* default timings */
185 tacls = 4;
186 twrph0 = 8;
187 twrph1 = 8;
188 }
189
190 if (tacls < 0 || twrph0 < 0 || twrph1 < 0) {
191 printk(KERN_ERR PFX "cannot get timings suitable for board\n");
192 return -EINVAL;
193 }
194
195 printk(KERN_INFO PFX "Tacls=%d, %dns Twrph0=%d %dns, Twrph1=%d %dns\n",
196 tacls, to_ns(tacls, clkrate),
197 twrph0, to_ns(twrph0, clkrate),
198 twrph1, to_ns(twrph1, clkrate));
199
200 if (!info->is_s3c2440) {
201 cfg = S3C2410_NFCONF_EN;
202 cfg |= S3C2410_NFCONF_TACLS(tacls-1);
203 cfg |= S3C2410_NFCONF_TWRPH0(twrph0-1);
204 cfg |= S3C2410_NFCONF_TWRPH1(twrph1-1);
205 } else {
206 cfg = S3C2440_NFCONF_TACLS(tacls-1);
207 cfg |= S3C2440_NFCONF_TWRPH0(twrph0-1);
208 cfg |= S3C2440_NFCONF_TWRPH1(twrph1-1);
209 }
210
211 pr_debug(PFX "NF_CONF is 0x%lx\n", cfg);
212
213 writel(cfg, info->regs + S3C2410_NFCONF);
214 return 0;
215 }
216
217 /* select chip */
218
219 static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
220 {
221 struct s3c2410_nand_info *info;
222 struct s3c2410_nand_mtd *nmtd;
223 struct nand_chip *this = mtd->priv;
224 void __iomem *reg;
225 unsigned long cur;
226 unsigned long bit;
227
228 nmtd = this->priv;
229 info = nmtd->info;
230
231 bit = (info->is_s3c2440) ? S3C2440_NFCONT_nFCE : S3C2410_NFCONF_nFCE;
232 reg = info->regs+((info->is_s3c2440) ? S3C2440_NFCONT:S3C2410_NFCONF);
233
234 cur = readl(reg);
235
236 if (chip == -1) {
237 cur |= bit;
238 } else {
239 if (nmtd->set != NULL && chip > nmtd->set->nr_chips) {
240 printk(KERN_ERR PFX "chip %d out of range\n", chip);
241 return;
242 }
243
244 if (info->platform != NULL) {
245 if (info->platform->select_chip != NULL)
246 (info->platform->select_chip)(nmtd->set, chip);
247 }
248
249 cur &= ~bit;
250 }
251
252 writel(cur, reg);
253 }
254
255 /* command and control functions
256 *
257 * Note, these all use tglx's method of changing the IO_ADDR_W field
258 * to make the code simpler, and use the nand layer's code to issue the
259 * command and address sequences via the proper IO ports.
260 *
261 */
262
263 static void s3c2410_nand_hwcontrol(struct mtd_info *mtd, int cmd)
264 {
265 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
266 struct nand_chip *chip = mtd->priv;
267
268 switch (cmd) {
269 case NAND_CTL_SETNCE:
270 case NAND_CTL_CLRNCE:
271 printk(KERN_ERR "%s: called for NCE\n", __FUNCTION__);
272 break;
273
274 case NAND_CTL_SETCLE:
275 chip->IO_ADDR_W = info->regs + S3C2410_NFCMD;
276 break;
277
278 case NAND_CTL_SETALE:
279 chip->IO_ADDR_W = info->regs + S3C2410_NFADDR;
280 break;
281
282 /* NAND_CTL_CLRCLE: */
283 /* NAND_CTL_CLRALE: */
284 default:
285 chip->IO_ADDR_W = info->regs + S3C2410_NFDATA;
286 break;
287 }
288 }
289
290 /* command and control functions */
291
292 static void s3c2440_nand_hwcontrol(struct mtd_info *mtd, int cmd)
293 {
294 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
295 struct nand_chip *chip = mtd->priv;
296
297 switch (cmd) {
298 case NAND_CTL_SETNCE:
299 case NAND_CTL_CLRNCE:
300 printk(KERN_ERR "%s: called for NCE\n", __FUNCTION__);
301 break;
302
303 case NAND_CTL_SETCLE:
304 chip->IO_ADDR_W = info->regs + S3C2440_NFCMD;
305 break;
306
307 case NAND_CTL_SETALE:
308 chip->IO_ADDR_W = info->regs + S3C2440_NFADDR;
309 break;
310
311 /* NAND_CTL_CLRCLE: */
312 /* NAND_CTL_CLRALE: */
313 default:
314 chip->IO_ADDR_W = info->regs + S3C2440_NFDATA;
315 break;
316 }
317 }
318
319 /* s3c2410_nand_devready()
320 *
321 * returns 0 if the nand is busy, 1 if it is ready
322 */
323
324 static int s3c2410_nand_devready(struct mtd_info *mtd)
325 {
326 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
327
328 if (info->is_s3c2440)
329 return readb(info->regs + S3C2440_NFSTAT) & S3C2440_NFSTAT_READY;
330 return readb(info->regs + S3C2410_NFSTAT) & S3C2410_NFSTAT_BUSY;
331 }
332
333
334 /* ECC handling functions */
335
336 static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
337 u_char *read_ecc, u_char *calc_ecc)
338 {
339 pr_debug("s3c2410_nand_correct_data(%p,%p,%p,%p)\n",
340 mtd, dat, read_ecc, calc_ecc);
341
342 pr_debug("eccs: read %02x,%02x,%02x vs calc %02x,%02x,%02x\n",
343 read_ecc[0], read_ecc[1], read_ecc[2],
344 calc_ecc[0], calc_ecc[1], calc_ecc[2]);
345
346 if (read_ecc[0] == calc_ecc[0] &&
347 read_ecc[1] == calc_ecc[1] &&
348 read_ecc[2] == calc_ecc[2])
349 return 0;
350
351 /* we curently have no method for correcting the error */
352
353 return -1;
354 }
355
356 /* ECC functions
357 *
358 * These allow the s3c2410 and s3c2440 to use the controller's ECC
359 * generator block to ECC the data as it passes through]
360 */
361
362 static void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
363 {
364 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
365 unsigned long ctrl;
366
367 ctrl = readl(info->regs + S3C2410_NFCONF);
368 ctrl |= S3C2410_NFCONF_INITECC;
369 writel(ctrl, info->regs + S3C2410_NFCONF);
370 }
371
372 static void s3c2440_nand_enable_hwecc(struct mtd_info *mtd, int mode)
373 {
374 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
375 unsigned long ctrl;
376
377 ctrl = readl(info->regs + S3C2440_NFCONT);
378 writel(ctrl | S3C2440_NFCONT_INITECC, info->regs + S3C2440_NFCONT);
379 }
380
381 static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd,
382 const u_char *dat, u_char *ecc_code)
383 {
384 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
385
386 ecc_code[0] = readb(info->regs + S3C2410_NFECC + 0);
387 ecc_code[1] = readb(info->regs + S3C2410_NFECC + 1);
388 ecc_code[2] = readb(info->regs + S3C2410_NFECC + 2);
389
390 pr_debug("calculate_ecc: returning ecc %02x,%02x,%02x\n",
391 ecc_code[0], ecc_code[1], ecc_code[2]);
392
393 return 0;
394 }
395
396
397 static int s3c2440_nand_calculate_ecc(struct mtd_info *mtd,
398 const u_char *dat, u_char *ecc_code)
399 {
400 struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
401 unsigned long ecc = readl(info->regs + S3C2440_NFMECC0);
402
403 ecc_code[0] = ecc;
404 ecc_code[1] = ecc >> 8;
405 ecc_code[2] = ecc >> 16;
406
407 pr_debug("calculate_ecc: returning ecc %02x,%02x,%02x\n",
408 ecc_code[0], ecc_code[1], ecc_code[2]);
409
410 return 0;
411 }
412
413
414 /* over-ride the standard functions for a little more speed. We can
415 * use read/write block to move the data buffers to/from the controller
416 */
417
418 static void s3c2410_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
419 {
420 struct nand_chip *this = mtd->priv;
421 readsb(this->IO_ADDR_R, buf, len);
422 }
423
424 static void s3c2410_nand_write_buf(struct mtd_info *mtd,
425 const u_char *buf, int len)
426 {
427 struct nand_chip *this = mtd->priv;
428 writesb(this->IO_ADDR_W, buf, len);
429 }
430
431 /* device management functions */
432
433 static int s3c2410_nand_remove(struct platform_device *pdev)
434 {
435 struct s3c2410_nand_info *info = to_nand_info(pdev);
436
437 platform_set_drvdata(pdev, NULL);
438
439 if (info == NULL)
440 return 0;
441
442 /* first thing we need to do is release all our mtds
443 * and their partitions, then go through freeing the
444 * resources used
445 */
446
447 if (info->mtds != NULL) {
448 struct s3c2410_nand_mtd *ptr = info->mtds;
449 int mtdno;
450
451 for (mtdno = 0; mtdno < info->mtd_count; mtdno++, ptr++) {
452 pr_debug("releasing mtd %d (%p)\n", mtdno, ptr);
453 nand_release(&ptr->mtd);
454 }
455
456 kfree(info->mtds);
457 }
458
459 /* free the common resources */
460
461 if (info->clk != NULL && !IS_ERR(info->clk)) {
462 clk_disable(info->clk);
463 clk_put(info->clk);
464 }
465
466 if (info->regs != NULL) {
467 iounmap(info->regs);
468 info->regs = NULL;
469 }
470
471 if (info->area != NULL) {
472 release_resource(info->area);
473 kfree(info->area);
474 info->area = NULL;
475 }
476
477 kfree(info);
478
479 return 0;
480 }
481
482 #ifdef CONFIG_MTD_PARTITIONS
483 static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
484 struct s3c2410_nand_mtd *mtd,
485 struct s3c2410_nand_set *set)
486 {
487 if (set == NULL)
488 return add_mtd_device(&mtd->mtd);
489
490 if (set->nr_partitions > 0 && set->partitions != NULL) {
491 return add_mtd_partitions(&mtd->mtd,
492 set->partitions,
493 set->nr_partitions);
494 }
495
496 return add_mtd_device(&mtd->mtd);
497 }
498 #else
499 static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
500 struct s3c2410_nand_mtd *mtd,
501 struct s3c2410_nand_set *set)
502 {
503 return add_mtd_device(&mtd->mtd);
504 }
505 #endif
506
507 /* s3c2410_nand_init_chip
508 *
509 * init a single instance of an chip
510 */
511
512 static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
513 struct s3c2410_nand_mtd *nmtd,
514 struct s3c2410_nand_set *set)
515 {
516 struct nand_chip *chip = &nmtd->chip;
517
518 chip->IO_ADDR_R = info->regs + S3C2410_NFDATA;
519 chip->IO_ADDR_W = info->regs + S3C2410_NFDATA;
520 chip->hwcontrol = s3c2410_nand_hwcontrol;
521 chip->dev_ready = s3c2410_nand_devready;
522 chip->write_buf = s3c2410_nand_write_buf;
523 chip->read_buf = s3c2410_nand_read_buf;
524 chip->select_chip = s3c2410_nand_select_chip;
525 chip->chip_delay = 50;
526 chip->priv = nmtd;
527 chip->options = 0;
528 chip->controller = &info->controller;
529
530 if (info->is_s3c2440) {
531 chip->IO_ADDR_R = info->regs + S3C2440_NFDATA;
532 chip->IO_ADDR_W = info->regs + S3C2440_NFDATA;
533 chip->hwcontrol = s3c2440_nand_hwcontrol;
534 }
535
536 nmtd->info = info;
537 nmtd->mtd.priv = chip;
538 nmtd->set = set;
539
540 if (hardware_ecc) {
541 chip->correct_data = s3c2410_nand_correct_data;
542 chip->enable_hwecc = s3c2410_nand_enable_hwecc;
543 chip->calculate_ecc = s3c2410_nand_calculate_ecc;
544 chip->eccmode = NAND_ECC_HW3_512;
545 chip->autooob = &nand_hw_eccoob;
546
547 if (info->is_s3c2440) {
548 chip->enable_hwecc = s3c2440_nand_enable_hwecc;
549 chip->calculate_ecc = s3c2440_nand_calculate_ecc;
550 }
551 } else {
552 chip->eccmode = NAND_ECC_SOFT;
553 }
554 }
555
556 /* s3c2410_nand_probe
557 *
558 * called by device layer when it finds a device matching
559 * one our driver can handled. This code checks to see if
560 * it can allocate all necessary resources then calls the
561 * nand layer to look for devices
562 */
563
564 static int s3c24xx_nand_probe(struct platform_device *pdev, int is_s3c2440)
565 {
566 struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
567 struct s3c2410_nand_info *info;
568 struct s3c2410_nand_mtd *nmtd;
569 struct s3c2410_nand_set *sets;
570 struct resource *res;
571 int err = 0;
572 int size;
573 int nr_sets;
574 int setno;
575
576 pr_debug("s3c2410_nand_probe(%p)\n", pdev);
577
578 info = kmalloc(sizeof(*info), GFP_KERNEL);
579 if (info == NULL) {
580 dev_err(&pdev->dev, "no memory for flash info\n");
581 err = -ENOMEM;
582 goto exit_error;
583 }
584
585 memzero(info, sizeof(*info));
586 platform_set_drvdata(pdev, info);
587
588 spin_lock_init(&info->controller.lock);
589 init_waitqueue_head(&info->controller.wq);
590
591 /* get the clock source and enable it */
592
593 info->clk = clk_get(&pdev->dev, "nand");
594 if (IS_ERR(info->clk)) {
595 dev_err(&pdev->dev, "failed to get clock");
596 err = -ENOENT;
597 goto exit_error;
598 }
599
600 clk_enable(info->clk);
601
602 /* allocate and map the resource */
603
604 /* currently we assume we have the one resource */
605 res = pdev->resource;
606 size = res->end - res->start + 1;
607
608 info->area = request_mem_region(res->start, size, pdev->name);
609
610 if (info->area == NULL) {
611 dev_err(&pdev->dev, "cannot reserve register region\n");
612 err = -ENOENT;
613 goto exit_error;
614 }
615
616 info->device = &pdev->dev;
617 info->platform = plat;
618 info->regs = ioremap(res->start, size);
619 info->is_s3c2440 = is_s3c2440;
620
621 if (info->regs == NULL) {
622 dev_err(&pdev->dev, "cannot reserve register region\n");
623 err = -EIO;
624 goto exit_error;
625 }
626
627 dev_dbg(&pdev->dev, "mapped registers at %p\n", info->regs);
628
629 /* initialise the hardware */
630
631 err = s3c2410_nand_inithw(info, pdev);
632 if (err != 0)
633 goto exit_error;
634
635 sets = (plat != NULL) ? plat->sets : NULL;
636 nr_sets = (plat != NULL) ? plat->nr_sets : 1;
637
638 info->mtd_count = nr_sets;
639
640 /* allocate our information */
641
642 size = nr_sets * sizeof(*info->mtds);
643 info->mtds = kmalloc(size, GFP_KERNEL);
644 if (info->mtds == NULL) {
645 dev_err(&pdev->dev, "failed to allocate mtd storage\n");
646 err = -ENOMEM;
647 goto exit_error;
648 }
649
650 memzero(info->mtds, size);
651
652 /* initialise all possible chips */
653
654 nmtd = info->mtds;
655
656 for (setno = 0; setno < nr_sets; setno++, nmtd++) {
657 pr_debug("initialising set %d (%p, info %p)\n",
658 setno, nmtd, info);
659
660 s3c2410_nand_init_chip(info, nmtd, sets);
661
662 nmtd->scan_res = nand_scan(&nmtd->mtd,
663 (sets) ? sets->nr_chips : 1);
664
665 if (nmtd->scan_res == 0) {
666 s3c2410_nand_add_partition(info, nmtd, sets);
667 }
668
669 if (sets != NULL)
670 sets++;
671 }
672
673 pr_debug("initialised ok\n");
674 return 0;
675
676 exit_error:
677 s3c2410_nand_remove(pdev);
678
679 if (err == 0)
680 err = -EINVAL;
681 return err;
682 }
683
684 /* driver device registration */
685
686 static int s3c2410_nand_probe(struct platform_device *dev)
687 {
688 return s3c24xx_nand_probe(dev, 0);
689 }
690
691 static int s3c2440_nand_probe(struct platform_device *dev)
692 {
693 return s3c24xx_nand_probe(dev, 1);
694 }
695
696 static struct platform_driver s3c2410_nand_driver = {
697 .probe = s3c2410_nand_probe,
698 .remove = s3c2410_nand_remove,
699 .driver = {
700 .name = "s3c2410-nand",
701 .owner = THIS_MODULE,
702 },
703 };
704
705 static struct platform_driver s3c2440_nand_driver = {
706 .probe = s3c2440_nand_probe,
707 .remove = s3c2410_nand_remove,
708 .driver = {
709 .name = "s3c2440-nand",
710 .owner = THIS_MODULE,
711 },
712 };
713
714 static int __init s3c2410_nand_init(void)
715 {
716 printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");
717
718 platform_driver_register(&s3c2440_nand_driver);
719 return platform_driver_register(&s3c2410_nand_driver);
720 }
721
722 static void __exit s3c2410_nand_exit(void)
723 {
724 platform_driver_unregister(&s3c2440_nand_driver);
725 platform_driver_unregister(&s3c2410_nand_driver);
726 }
727
728 module_init(s3c2410_nand_init);
729 module_exit(s3c2410_nand_exit);
730
731 MODULE_LICENSE("GPL");
732 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
733 MODULE_DESCRIPTION("S3C24XX MTD NAND driver");
kernel-based virtual machine