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-rw-r--r--drivers/mtd/nand/Kconfig14
-rw-r--r--drivers/mtd/nand/Makefile2
-rw-r--r--drivers/mtd/nand/tx4925ndfmc.c416
-rw-r--r--drivers/mtd/nand/tx4938ndfmc.c406
4 files changed, 0 insertions, 838 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 94b1d0e3ec85..36d34e5e5a5a 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -58,20 +58,6 @@ config MTD_NAND_TOTO
58config MTD_NAND_IDS 58config MTD_NAND_IDS
59 tristate 59 tristate
60 60
61config MTD_NAND_TX4925NDFMC
62 tristate "SmartMedia Card on Toshiba RBTX4925 reference board"
63 depends on TOSHIBA_RBTX4925 && MTD_NAND && TOSHIBA_RBTX4925_MPLEX_NAND
64 help
65 This enables the driver for the NAND flash device found on the
66 Toshiba RBTX4925 reference board, which is a SmartMediaCard.
67
68config MTD_NAND_TX4938NDFMC
69 tristate "NAND Flash device on Toshiba RBTX4938 reference board"
70 depends on TOSHIBA_RBTX4938 && MTD_NAND && TOSHIBA_RBTX4938_MPLEX_NAND
71 help
72 This enables the driver for the NAND flash device found on the
73 Toshiba RBTX4938 reference board.
74
75config MTD_NAND_AU1550 61config MTD_NAND_AU1550
76 tristate "Au1550 NAND support" 62 tristate "Au1550 NAND support"
77 depends on SOC_AU1550 && MTD_NAND 63 depends on SOC_AU1550 && MTD_NAND
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index d9dc8cc2da8c..41742026a52e 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -10,8 +10,6 @@ obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
10obj-$(CONFIG_MTD_NAND_TOTO) += toto.o 10obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
11obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o 11obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
12obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o 12obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
13obj-$(CONFIG_MTD_NAND_TX4925NDFMC) += tx4925ndfmc.o
14obj-$(CONFIG_MTD_NAND_TX4938NDFMC) += tx4938ndfmc.o
15obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o 13obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
16obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB) += ppchameleonevb.o 14obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB) += ppchameleonevb.o
17obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o 15obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o
diff --git a/drivers/mtd/nand/tx4925ndfmc.c b/drivers/mtd/nand/tx4925ndfmc.c
deleted file mode 100644
index bba688830c9b..000000000000
--- a/drivers/mtd/nand/tx4925ndfmc.c
+++ /dev/null
@@ -1,416 +0,0 @@
1/*
2 * drivers/mtd/tx4925ndfmc.c
3 *
4 * Overview:
5 * This is a device driver for the NAND flash device found on the
6 * Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports
7 * 16MiB, 32MiB and 64MiB cards.
8 *
9 * Author: MontaVista Software, Inc. source@mvista.com
10 *
11 * Derived from drivers/mtd/autcpu12.c
12 * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
13 *
14 * $Id: tx4925ndfmc.c,v 1.5 2004/10/05 13:50:20 gleixner Exp $
15 *
16 * Copyright (C) 2001 Toshiba Corporation
17 *
18 * 2003 (c) MontaVista Software, Inc. This file is licensed under
19 * the terms of the GNU General Public License version 2. This program
20 * is licensed "as is" without any warranty of any kind, whether express
21 * or implied.
22 *
23 */
24
25#include <linux/slab.h>
26#include <linux/init.h>
27#include <linux/module.h>
28#include <linux/mtd/mtd.h>
29#include <linux/mtd/nand.h>
30#include <linux/mtd/partitions.h>
31#include <linux/delay.h>
32#include <asm/io.h>
33#include <asm/tx4925/tx4925_nand.h>
34
35extern struct nand_oobinfo jffs2_oobinfo;
36
37/*
38 * MTD structure for RBTX4925 board
39 */
40static struct mtd_info *tx4925ndfmc_mtd = NULL;
41
42/*
43 * Define partitions for flash devices
44 */
45
46static struct mtd_partition partition_info16k[] = {
47 { .name = "RBTX4925 flash partition 1",
48 .offset = 0,
49 .size = 8 * 0x00100000 },
50 { .name = "RBTX4925 flash partition 2",
51 .offset = 8 * 0x00100000,
52 .size = 8 * 0x00100000 },
53};
54
55static struct mtd_partition partition_info32k[] = {
56 { .name = "RBTX4925 flash partition 1",
57 .offset = 0,
58 .size = 8 * 0x00100000 },
59 { .name = "RBTX4925 flash partition 2",
60 .offset = 8 * 0x00100000,
61 .size = 24 * 0x00100000 },
62};
63
64static struct mtd_partition partition_info64k[] = {
65 { .name = "User FS",
66 .offset = 0,
67 .size = 16 * 0x00100000 },
68 { .name = "RBTX4925 flash partition 2",
69 .offset = 16 * 0x00100000,
70 .size = 48 * 0x00100000},
71};
72
73static struct mtd_partition partition_info128k[] = {
74 { .name = "Skip bad section",
75 .offset = 0,
76 .size = 16 * 0x00100000 },
77 { .name = "User FS",
78 .offset = 16 * 0x00100000,
79 .size = 112 * 0x00100000 },
80};
81#define NUM_PARTITIONS16K 2
82#define NUM_PARTITIONS32K 2
83#define NUM_PARTITIONS64K 2
84#define NUM_PARTITIONS128K 2
85
86/*
87 * hardware specific access to control-lines
88*/
89static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
90{
91
92 switch(cmd){
93
94 case NAND_CTL_SETCLE:
95 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE;
96 break;
97 case NAND_CTL_CLRCLE:
98 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE;
99 break;
100 case NAND_CTL_SETALE:
101 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE;
102 break;
103 case NAND_CTL_CLRALE:
104 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE;
105 break;
106 case NAND_CTL_SETNCE:
107 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE;
108 break;
109 case NAND_CTL_CLRNCE:
110 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE;
111 break;
112 case NAND_CTL_SETWP:
113 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE;
114 break;
115 case NAND_CTL_CLRWP:
116 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE;
117 break;
118 }
119}
120
121/*
122* read device ready pin
123*/
124static int tx4925ndfmc_device_ready(struct mtd_info *mtd)
125{
126 int ready;
127 ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1;
128 return ready;
129}
130void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
131{
132 /* reset first */
133 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK;
134 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
135 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB;
136}
137static void tx4925ndfmc_disable_ecc(void)
138{
139 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
140}
141static void tx4925ndfmc_enable_read_ecc(void)
142{
143 tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
144 tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ;
145}
146void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){
147 int i;
148 u_char *ecc = ecc_code;
149 tx4925ndfmc_enable_read_ecc();
150 for (i = 0;i < 6;i++,ecc++)
151 *ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr));
152 tx4925ndfmc_disable_ecc();
153}
154void tx4925ndfmc_device_setup(void)
155{
156
157 *(unsigned char *)0xbb005000 &= ~0x08;
158
159 /* reset NDFMC */
160 tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST;
161 while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST);
162
163 /* setup BusSeparete, Hold Time, Strobe Pulse Width */
164 tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0;
165 tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW;
166}
167static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd)
168{
169 struct nand_chip *this = mtd->priv;
170 return tx4925_read_nfmc(this->IO_ADDR_R);
171}
172
173static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
174{
175 struct nand_chip *this = mtd->priv;
176 tx4925_write_nfmc(byte, this->IO_ADDR_W);
177}
178
179static void tx4925ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
180{
181 int i;
182 struct nand_chip *this = mtd->priv;
183
184 for (i=0; i<len; i++)
185 tx4925_write_nfmc(buf[i], this->IO_ADDR_W);
186}
187
188static void tx4925ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
189{
190 int i;
191 struct nand_chip *this = mtd->priv;
192
193 for (i=0; i<len; i++)
194 buf[i] = tx4925_read_nfmc(this->IO_ADDR_R);
195}
196
197static int tx4925ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
198{
199 int i;
200 struct nand_chip *this = mtd->priv;
201
202 for (i=0; i<len; i++)
203 if (buf[i] != tx4925_read_nfmc(this->IO_ADDR_R))
204 return -EFAULT;
205
206 return 0;
207}
208
209/*
210 * Send command to NAND device
211 */
212static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
213{
214 register struct nand_chip *this = mtd->priv;
215
216 /* Begin command latch cycle */
217 this->hwcontrol(mtd, NAND_CTL_SETCLE);
218 /*
219 * Write out the command to the device.
220 */
221 if (command == NAND_CMD_SEQIN) {
222 int readcmd;
223
224 if (column >= mtd->oobblock) {
225 /* OOB area */
226 column -= mtd->oobblock;
227 readcmd = NAND_CMD_READOOB;
228 } else if (column < 256) {
229 /* First 256 bytes --> READ0 */
230 readcmd = NAND_CMD_READ0;
231 } else {
232 column -= 256;
233 readcmd = NAND_CMD_READ1;
234 }
235 this->write_byte(mtd, readcmd);
236 }
237 this->write_byte(mtd, command);
238
239 /* Set ALE and clear CLE to start address cycle */
240 this->hwcontrol(mtd, NAND_CTL_CLRCLE);
241
242 if (column != -1 || page_addr != -1) {
243 this->hwcontrol(mtd, NAND_CTL_SETALE);
244
245 /* Serially input address */
246 if (column != -1)
247 this->write_byte(mtd, column);
248 if (page_addr != -1) {
249 this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
250 this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
251 /* One more address cycle for higher density devices */
252 if (mtd->size & 0x0c000000)
253 this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
254 }
255 /* Latch in address */
256 this->hwcontrol(mtd, NAND_CTL_CLRALE);
257 }
258
259 /*
260 * program and erase have their own busy handlers
261 * status and sequential in needs no delay
262 */
263 switch (command) {
264
265 case NAND_CMD_PAGEPROG:
266 /* Turn off WE */
267 this->hwcontrol (mtd, NAND_CTL_CLRWP);
268 return;
269
270 case NAND_CMD_SEQIN:
271 /* Turn on WE */
272 this->hwcontrol (mtd, NAND_CTL_SETWP);
273 return;
274
275 case NAND_CMD_ERASE1:
276 case NAND_CMD_ERASE2:
277 case NAND_CMD_STATUS:
278 return;
279
280 case NAND_CMD_RESET:
281 if (this->dev_ready)
282 break;
283 this->hwcontrol(mtd, NAND_CTL_SETCLE);
284 this->write_byte(mtd, NAND_CMD_STATUS);
285 this->hwcontrol(mtd, NAND_CTL_CLRCLE);
286 while ( !(this->read_byte(mtd) & 0x40));
287 return;
288
289 /* This applies to read commands */
290 default:
291 /*
292 * If we don't have access to the busy pin, we apply the given
293 * command delay
294 */
295 if (!this->dev_ready) {
296 udelay (this->chip_delay);
297 return;
298 }
299 }
300
301 /* wait until command is processed */
302 while (!this->dev_ready(mtd));
303}
304
305#ifdef CONFIG_MTD_CMDLINE_PARTS
306extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
307n **pparts, char *);
308#endif
309
310/*
311 * Main initialization routine
312 */
313extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
314int __init tx4925ndfmc_init (void)
315{
316 struct nand_chip *this;
317 int err = 0;
318
319 /* Allocate memory for MTD device structure and private data */
320 tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
321 GFP_KERNEL);
322 if (!tx4925ndfmc_mtd) {
323 printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n");
324 err = -ENOMEM;
325 goto out;
326 }
327
328 tx4925ndfmc_device_setup();
329
330 /* io is indirect via a register so don't need to ioremap address */
331
332 /* Get pointer to private data */
333 this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]);
334
335 /* Initialize structures */
336 memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info));
337 memset((char *) this, 0, sizeof(struct nand_chip));
338
339 /* Link the private data with the MTD structure */
340 tx4925ndfmc_mtd->priv = this;
341
342 /* Set address of NAND IO lines */
343 this->IO_ADDR_R = (void __iomem *)&(tx4925_ndfmcptr->dtr);
344 this->IO_ADDR_W = (void __iomem *)&(tx4925_ndfmcptr->dtr);
345 this->hwcontrol = tx4925ndfmc_hwcontrol;
346 this->enable_hwecc = tx4925ndfmc_enable_hwecc;
347 this->calculate_ecc = tx4925ndfmc_readecc;
348 this->correct_data = nand_correct_data;
349 this->eccmode = NAND_ECC_HW6_512;
350 this->dev_ready = tx4925ndfmc_device_ready;
351 /* 20 us command delay time */
352 this->chip_delay = 20;
353 this->read_byte = tx4925ndfmc_nand_read_byte;
354 this->write_byte = tx4925ndfmc_nand_write_byte;
355 this->cmdfunc = tx4925ndfmc_nand_command;
356 this->write_buf = tx4925ndfmc_nand_write_buf;
357 this->read_buf = tx4925ndfmc_nand_read_buf;
358 this->verify_buf = tx4925ndfmc_nand_verify_buf;
359
360 /* Scan to find existance of the device */
361 if (nand_scan (tx4925ndfmc_mtd, 1)) {
362 err = -ENXIO;
363 goto out_ior;
364 }
365
366 /* Register the partitions */
367#ifdef CONFIG_MTD_CMDLINE_PARTS
368 {
369 int mtd_parts_nb = 0;
370 struct mtd_partition *mtd_parts = 0;
371 mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc");
372 if (mtd_parts_nb > 0)
373 add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb);
374 else
375 add_mtd_device(tx4925ndfmc_mtd);
376 }
377#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */
378 switch(tx4925ndfmc_mtd->size){
379 case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break;
380 case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break;
381 case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break;
382 case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break;
383 default: {
384 printk ("Unsupported SmartMedia device\n");
385 err = -ENXIO;
386 goto out_ior;
387 }
388 }
389#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
390 goto out;
391
392out_ior:
393out:
394 return err;
395}
396
397module_init(tx4925ndfmc_init);
398
399/*
400 * Clean up routine
401 */
402#ifdef MODULE
403static void __exit tx4925ndfmc_cleanup (void)
404{
405 /* Release resources, unregister device */
406 nand_release (tx4925ndfmc_mtd);
407
408 /* Free the MTD device structure */
409 kfree (tx4925ndfmc_mtd);
410}
411module_exit(tx4925ndfmc_cleanup);
412#endif
413
414MODULE_LICENSE("GPL");
415MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
416MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925");
diff --git a/drivers/mtd/nand/tx4938ndfmc.c b/drivers/mtd/nand/tx4938ndfmc.c
deleted file mode 100644
index df26e58820b3..000000000000
--- a/drivers/mtd/nand/tx4938ndfmc.c
+++ /dev/null
@@ -1,406 +0,0 @@
1/*
2 * drivers/mtd/nand/tx4938ndfmc.c
3 *
4 * Overview:
5 * This is a device driver for the NAND flash device connected to
6 * TX4938 internal NAND Memory Controller.
7 * TX4938 NDFMC is almost same as TX4925 NDFMC, but register size are 64 bit.
8 *
9 * Author: source@mvista.com
10 *
11 * Based on spia.c by Steven J. Hill
12 *
13 * $Id: tx4938ndfmc.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
14 *
15 * Copyright (C) 2000-2001 Toshiba Corporation
16 *
17 * 2003 (c) MontaVista Software, Inc. This file is licensed under the
18 * terms of the GNU General Public License version 2. This program is
19 * licensed "as is" without any warranty of any kind, whether express
20 * or implied.
21 */
22#include <linux/config.h>
23#include <linux/slab.h>
24#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/mtd/mtd.h>
27#include <linux/mtd/nand.h>
28#include <linux/mtd/nand_ecc.h>
29#include <linux/mtd/partitions.h>
30#include <asm/io.h>
31#include <asm/bootinfo.h>
32#include <linux/delay.h>
33#include <asm/tx4938/rbtx4938.h>
34
35extern struct nand_oobinfo jffs2_oobinfo;
36
37/*
38 * MTD structure for TX4938 NDFMC
39 */
40static struct mtd_info *tx4938ndfmc_mtd;
41
42/*
43 * Define partitions for flash device
44 */
45#define flush_wb() (void)tx4938_ndfmcptr->mcr;
46
47#define NUM_PARTITIONS 3
48#define NUMBER_OF_CIS_BLOCKS 24
49#define SIZE_OF_BLOCK 0x00004000
50#define NUMBER_OF_BLOCK_PER_ZONE 1024
51#define SIZE_OF_ZONE (NUMBER_OF_BLOCK_PER_ZONE * SIZE_OF_BLOCK)
52#ifndef CONFIG_MTD_CMDLINE_PARTS
53/*
54 * You can use the following sample of MTD partitions
55 * on the NAND Flash Memory 32MB or more.
56 *
57 * The following figure shows the image of the sample partition on
58 * the 32MB NAND Flash Memory.
59 *
60 * Block No.
61 * 0 +-----------------------------+ ------
62 * | CIS | ^
63 * 24 +-----------------------------+ |
64 * | kernel image | | Zone 0
65 * | | |
66 * +-----------------------------+ |
67 * 1023 | unused area | v
68 * +-----------------------------+ ------
69 * 1024 | JFFS2 | ^
70 * | | |
71 * | | | Zone 1
72 * | | |
73 * | | |
74 * | | v
75 * 2047 +-----------------------------+ ------
76 *
77 */
78static struct mtd_partition partition_info[NUM_PARTITIONS] = {
79 {
80 .name = "RBTX4938 CIS Area",
81 .offset = 0,
82 .size = (NUMBER_OF_CIS_BLOCKS * SIZE_OF_BLOCK),
83 .mask_flags = MTD_WRITEABLE /* This partition is NOT writable */
84 },
85 {
86 .name = "RBTX4938 kernel image",
87 .offset = MTDPART_OFS_APPEND,
88 .size = 8 * 0x00100000, /* 8MB (Depends on size of kernel image) */
89 .mask_flags = MTD_WRITEABLE /* This partition is NOT writable */
90 },
91 {
92 .name = "Root FS (JFFS2)",
93 .offset = (0 + SIZE_OF_ZONE), /* start address of next zone */
94 .size = MTDPART_SIZ_FULL
95 },
96};
97#endif
98
99static void tx4938ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
100{
101 switch (cmd) {
102 case NAND_CTL_SETCLE:
103 tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CLE;
104 break;
105 case NAND_CTL_CLRCLE:
106 tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CLE;
107 break;
108 case NAND_CTL_SETALE:
109 tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_ALE;
110 break;
111 case NAND_CTL_CLRALE:
112 tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_ALE;
113 break;
114 /* TX4938_NDFMCR_CE bit is 0:high 1:low */
115 case NAND_CTL_SETNCE:
116 tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CE;
117 break;
118 case NAND_CTL_CLRNCE:
119 tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CE;
120 break;
121 case NAND_CTL_SETWP:
122 tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_WE;
123 break;
124 case NAND_CTL_CLRWP:
125 tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_WE;
126 break;
127 }
128}
129static int tx4938ndfmc_dev_ready(struct mtd_info *mtd)
130{
131 flush_wb();
132 return !(tx4938_ndfmcptr->sr & TX4938_NDFSR_BUSY);
133}
134static void tx4938ndfmc_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
135{
136 u32 mcr = tx4938_ndfmcptr->mcr;
137 mcr &= ~TX4938_NDFMCR_ECC_ALL;
138 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
139 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_READ;
140 ecc_code[1] = tx4938_ndfmcptr->dtr;
141 ecc_code[0] = tx4938_ndfmcptr->dtr;
142 ecc_code[2] = tx4938_ndfmcptr->dtr;
143 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
144}
145static void tx4938ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
146{
147 u32 mcr = tx4938_ndfmcptr->mcr;
148 mcr &= ~TX4938_NDFMCR_ECC_ALL;
149 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_RESET;
150 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
151 tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_ON;
152}
153
154static u_char tx4938ndfmc_nand_read_byte(struct mtd_info *mtd)
155{
156 struct nand_chip *this = mtd->priv;
157 return tx4938_read_nfmc(this->IO_ADDR_R);
158}
159
160static void tx4938ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
161{
162 struct nand_chip *this = mtd->priv;
163 tx4938_write_nfmc(byte, this->IO_ADDR_W);
164}
165
166static void tx4938ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
167{
168 int i;
169 struct nand_chip *this = mtd->priv;
170
171 for (i=0; i<len; i++)
172 tx4938_write_nfmc(buf[i], this->IO_ADDR_W);
173}
174
175static void tx4938ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
176{
177 int i;
178 struct nand_chip *this = mtd->priv;
179
180 for (i=0; i<len; i++)
181 buf[i] = tx4938_read_nfmc(this->IO_ADDR_R);
182}
183
184static int tx4938ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
185{
186 int i;
187 struct nand_chip *this = mtd->priv;
188
189 for (i=0; i<len; i++)
190 if (buf[i] != tx4938_read_nfmc(this->IO_ADDR_R))
191 return -EFAULT;
192
193 return 0;
194}
195
196/*
197 * Send command to NAND device
198 */
199static void tx4938ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
200{
201 register struct nand_chip *this = mtd->priv;
202
203 /* Begin command latch cycle */
204 this->hwcontrol(mtd, NAND_CTL_SETCLE);
205 /*
206 * Write out the command to the device.
207 */
208 if (command == NAND_CMD_SEQIN) {
209 int readcmd;
210
211 if (column >= mtd->oobblock) {
212 /* OOB area */
213 column -= mtd->oobblock;
214 readcmd = NAND_CMD_READOOB;
215 } else if (column < 256) {
216 /* First 256 bytes --> READ0 */
217 readcmd = NAND_CMD_READ0;
218 } else {
219 column -= 256;
220 readcmd = NAND_CMD_READ1;
221 }
222 this->write_byte(mtd, readcmd);
223 }
224 this->write_byte(mtd, command);
225
226 /* Set ALE and clear CLE to start address cycle */
227 this->hwcontrol(mtd, NAND_CTL_CLRCLE);
228
229 if (column != -1 || page_addr != -1) {
230 this->hwcontrol(mtd, NAND_CTL_SETALE);
231
232 /* Serially input address */
233 if (column != -1)
234 this->write_byte(mtd, column);
235 if (page_addr != -1) {
236 this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
237 this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
238 /* One more address cycle for higher density devices */
239 if (mtd->size & 0x0c000000)
240 this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
241 }
242 /* Latch in address */
243 this->hwcontrol(mtd, NAND_CTL_CLRALE);
244 }
245
246 /*
247 * program and erase have their own busy handlers
248 * status and sequential in needs no delay
249 */
250 switch (command) {
251
252 case NAND_CMD_PAGEPROG:
253 /* Turn off WE */
254 this->hwcontrol (mtd, NAND_CTL_CLRWP);
255 return;
256
257 case NAND_CMD_SEQIN:
258 /* Turn on WE */
259 this->hwcontrol (mtd, NAND_CTL_SETWP);
260 return;
261
262 case NAND_CMD_ERASE1:
263 case NAND_CMD_ERASE2:
264 case NAND_CMD_STATUS:
265 return;
266
267 case NAND_CMD_RESET:
268 if (this->dev_ready)
269 break;
270 this->hwcontrol(mtd, NAND_CTL_SETCLE);
271 this->write_byte(mtd, NAND_CMD_STATUS);
272 this->hwcontrol(mtd, NAND_CTL_CLRCLE);
273 while ( !(this->read_byte(mtd) & 0x40));
274 return;
275
276 /* This applies to read commands */
277 default:
278 /*
279 * If we don't have access to the busy pin, we apply the given
280 * command delay
281 */
282 if (!this->dev_ready) {
283 udelay (this->chip_delay);
284 return;
285 }
286 }
287
288 /* wait until command is processed */
289 while (!this->dev_ready(mtd));
290}
291
292#ifdef CONFIG_MTD_CMDLINE_PARTS
293extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, char *);
294#endif
295/*
296 * Main initialization routine
297 */
298int __init tx4938ndfmc_init (void)
299{
300 struct nand_chip *this;
301 int bsprt = 0, hold = 0xf, spw = 0xf;
302 int protected = 0;
303
304 if ((*rbtx4938_piosel_ptr & 0x0c) != 0x08) {
305 printk("TX4938 NDFMC: disabled by IOC PIOSEL\n");
306 return -ENODEV;
307 }
308 bsprt = 1;
309 hold = 2;
310 spw = 9 - 1; /* 8 GBUSCLK = 80ns (@ GBUSCLK 100MHz) */
311
312 if ((tx4938_ccfgptr->pcfg &
313 (TX4938_PCFG_ATA_SEL|TX4938_PCFG_ISA_SEL|TX4938_PCFG_NDF_SEL))
314 != TX4938_PCFG_NDF_SEL) {
315 printk("TX4938 NDFMC: disabled by PCFG.\n");
316 return -ENODEV;
317 }
318
319 /* reset NDFMC */
320 tx4938_ndfmcptr->rstr |= TX4938_NDFRSTR_RST;
321 while (tx4938_ndfmcptr->rstr & TX4938_NDFRSTR_RST)
322 ;
323 /* setup BusSeparete, Hold Time, Strobe Pulse Width */
324 tx4938_ndfmcptr->mcr = bsprt ? TX4938_NDFMCR_BSPRT : 0;
325 tx4938_ndfmcptr->spr = hold << 4 | spw;
326
327 /* Allocate memory for MTD device structure and private data */
328 tx4938ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
329 GFP_KERNEL);
330 if (!tx4938ndfmc_mtd) {
331 printk ("Unable to allocate TX4938 NDFMC MTD device structure.\n");
332 return -ENOMEM;
333 }
334
335 /* Get pointer to private data */
336 this = (struct nand_chip *) (&tx4938ndfmc_mtd[1]);
337
338 /* Initialize structures */
339 memset((char *) tx4938ndfmc_mtd, 0, sizeof(struct mtd_info));
340 memset((char *) this, 0, sizeof(struct nand_chip));
341
342 /* Link the private data with the MTD structure */
343 tx4938ndfmc_mtd->priv = this;
344
345 /* Set address of NAND IO lines */
346 this->IO_ADDR_R = (unsigned long)&tx4938_ndfmcptr->dtr;
347 this->IO_ADDR_W = (unsigned long)&tx4938_ndfmcptr->dtr;
348 this->hwcontrol = tx4938ndfmc_hwcontrol;
349 this->dev_ready = tx4938ndfmc_dev_ready;
350 this->calculate_ecc = tx4938ndfmc_calculate_ecc;
351 this->correct_data = nand_correct_data;
352 this->enable_hwecc = tx4938ndfmc_enable_hwecc;
353 this->eccmode = NAND_ECC_HW3_256;
354 this->chip_delay = 100;
355 this->read_byte = tx4938ndfmc_nand_read_byte;
356 this->write_byte = tx4938ndfmc_nand_write_byte;
357 this->cmdfunc = tx4938ndfmc_nand_command;
358 this->write_buf = tx4938ndfmc_nand_write_buf;
359 this->read_buf = tx4938ndfmc_nand_read_buf;
360 this->verify_buf = tx4938ndfmc_nand_verify_buf;
361
362 /* Scan to find existance of the device */
363 if (nand_scan (tx4938ndfmc_mtd, 1)) {
364 kfree (tx4938ndfmc_mtd);
365 return -ENXIO;
366 }
367
368 if (protected) {
369 printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
370 tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
371 }
372
373#ifdef CONFIG_MTD_CMDLINE_PARTS
374 {
375 int mtd_parts_nb = 0;
376 struct mtd_partition *mtd_parts = 0;
377 mtd_parts_nb = parse_cmdline_partitions(tx4938ndfmc_mtd, &mtd_parts, "tx4938ndfmc");
378 if (mtd_parts_nb > 0)
379 add_mtd_partitions(tx4938ndfmc_mtd, mtd_parts, mtd_parts_nb);
380 else
381 add_mtd_device(tx4938ndfmc_mtd);
382 }
383#else
384 add_mtd_partitions(tx4938ndfmc_mtd, partition_info, NUM_PARTITIONS );
385#endif
386
387 return 0;
388}
389module_init(tx4938ndfmc_init);
390
391/*
392 * Clean up routine
393 */
394static void __exit tx4938ndfmc_cleanup (void)
395{
396 /* Release resources, unregister device */
397 nand_release (tx4938ndfmc_mtd);
398
399 /* Free the MTD device structure */
400 kfree (tx4938ndfmc_mtd);
401}
402module_exit(tx4938ndfmc_cleanup);
403
404MODULE_LICENSE("GPL");
405MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
406MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on TX4938 NDFMC");
generated by cgit v1.2.2 (git 2.25.0) at 2025-11-26 11:21:48 -0500