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authorMarian Balakowicz <m8@semihalf.com>2005-11-07 03:33:38 -0500
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-07 04:46:22 -0500
commitbe30c10fd8015a00c97c9b473263fe3c581389de (patch)
tree3c27213e30636701f6e454050996e988c3b14471 /drivers
parentea17629f3e6f64591a98a9049a0d725d2672509c (diff)
[MTD] maps: Add support for the "TQM834x" Boards
The following patch adds support for the TQ Systems TQM834x Boards. Verified on TQM8349L. This is a resubmit after integrating the suggested changes. Signed-off-by: Marian Balakowicz <m8@semihalf.com> Signed-off-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/maps/Kconfig10
-rw-r--r--drivers/mtd/maps/Makefile3
-rw-r--r--drivers/mtd/maps/tqm834x.c291
3 files changed, 302 insertions, 2 deletions
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index 94a693f4bea7..e12e36a003dc 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -1,5 +1,5 @@
1# drivers/mtd/maps/Kconfig 1# drivers/mtd/maps/Kconfig
2# $Id: Kconfig,v 1.59 2005/09/18 10:46:41 joern Exp $ 2# $Id: Kconfig,v 1.60 2005/11/07 08:33:35 gleixner Exp $
3 3
4menu "Mapping drivers for chip access" 4menu "Mapping drivers for chip access"
5 depends on MTD!=n 5 depends on MTD!=n
@@ -347,6 +347,14 @@ config MTD_REDWOOD
347 Redwood board. If you have one of these boards and would like to 347 Redwood board. If you have one of these boards and would like to
348 use the flash chips on it, say 'Y'. 348 use the flash chips on it, say 'Y'.
349 349
350config MTD_TQM834x
351 tristate "Flash device mapped on TQ Components TQM834x Boards"
352 depends on MTD_CFI && TQM834x
353 help
354 This enables access routines for the flash chips on the
355 TQ Components TQM834x boards. If you have one of these boards
356 and would like to use the flash chips on it, say 'Y'.
357
350config MTD_CSTM_MIPS_IXX 358config MTD_CSTM_MIPS_IXX
351 tristate "Flash chip mapping on ITE QED-4N-S01B, Globespan IVR or custom board" 359 tristate "Flash chip mapping on ITE QED-4N-S01B, Globespan IVR or custom board"
352 depends on MIPS && MTD_CFI && MTD_JEDECPROBE && MTD_PARTITIONS 360 depends on MIPS && MTD_CFI && MTD_JEDECPROBE && MTD_PARTITIONS
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index 2afa80678d53..81f97c60e0c8 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -1,7 +1,7 @@
1# 1#
2# linux/drivers/maps/Makefile 2# linux/drivers/maps/Makefile
3# 3#
4# $Id: Makefile.common,v 1.32 2005/09/18 10:46:41 joern Exp $ 4# $Id: Makefile.common,v 1.33 2005/11/07 08:33:35 gleixner Exp $
5 5
6ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y) 6ifeq ($(CONFIG_MTD_COMPLEX_MAPPINGS),y)
7obj-$(CONFIG_MTD) += map_funcs.o 7obj-$(CONFIG_MTD) += map_funcs.o
@@ -72,3 +72,4 @@ obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
72obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o 72obj-$(CONFIG_MTD_OMAP_NOR) += omap_nor.o
73obj-$(CONFIG_MTD_PQ2FADS) += pq2fads.o 73obj-$(CONFIG_MTD_PQ2FADS) += pq2fads.o
74obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o 74obj-$(CONFIG_MTD_MTX1) += mtx-1_flash.o
75obj-$(CONFIG_MTD_TQM834x) += tqm834x.o
diff --git a/drivers/mtd/maps/tqm834x.c b/drivers/mtd/maps/tqm834x.c
new file mode 100644
index 000000000000..d0bc9593cb4d
--- /dev/null
+++ b/drivers/mtd/maps/tqm834x.c
@@ -0,0 +1,291 @@
1/*
2 * drivers/mtd/maps/tqm834x.c
3 *
4 * MTD mapping driver for TQM834x boards
5 *
6 * Copyright 2005 Wolfgang Denk, DENX Software Engineering, <wd@denx.de>.
7 *
8 * This file is licensed under the terms of the GNU General Public License
9 * version 2. This program is licensed "as is" without any warranty of any
10 * kind, whether express or implied.
11 *
12 */
13
14#include <linux/config.h>
15#include <linux/init.h>
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/slab.h>
20#include <asm/io.h>
21#include <asm/ppcboot.h>
22
23#include <linux/mtd/mtd.h>
24#include <linux/mtd/map.h>
25#include <linux/mtd/partitions.h>
26
27#define FLASH_BANK_MAX 2
28
29extern unsigned char __res[];
30
31/* trivial struct to describe partition information */
32struct mtd_part_def
33{
34 int nums;
35 unsigned char *type;
36 struct mtd_partition* mtd_part;
37};
38
39static struct mtd_info* mtd_banks[FLASH_BANK_MAX];
40static struct map_info* map_banks[FLASH_BANK_MAX];
41static struct mtd_part_def part_banks[FLASH_BANK_MAX];
42
43static unsigned long num_banks;
44static unsigned long start_scan_addr;
45
46#ifdef CONFIG_MTD_PARTITIONS
47/*
48 * The following defines the partition layout of TQM834x boards.
49 *
50 * See include/linux/mtd/partitions.h for definition of the
51 * mtd_partition structure.
52 *
53 * Assume minimal initial size of 4 MiB per bank, will be updated
54 * later in init_tqm834x_mtd() routine.
55 */
56
57/* Partition definition for the first flash bank which is always present. */
58static struct mtd_partition tqm834x_partitions_bank1[] = {
59 {
60 .name = "u-boot", /* u-boot firmware */
61 .offset = 0x00000000,
62 .size = 0x00040000, /* 256 KiB */
63 /*mask_flags: MTD_WRITEABLE, * force read-only */
64 },
65 {
66 .name = "env", /* u-boot environment */
67 .offset = 0x00040000,
68 .size = 0x00020000, /* 128 KiB */
69 /*mask_flags: MTD_WRITEABLE, * force read-only */
70 },
71 {
72 .name = "kernel", /* linux kernel image */
73 .offset = 0x00060000,
74 .size = 0x00100000, /* 1 MiB */
75 /*mask_flags: MTD_WRITEABLE, * force read-only */
76 },
77 {
78 .name = "initrd", /* ramdisk image */
79 .offset = 0x00160000,
80 .size = 0x00200000, /* 2 MiB */
81 },
82 {
83 .name = "user", /* user data */
84 .offset = 0x00360000,
85 .size = 0x000a0000, /* remaining space */
86 /* NOTE: this parttion size is re-calcated in */
87 /* init_tqm834x_mtd() to cover actual remaining space. */
88 },
89};
90
91/* Partition definition for the second flash bank which may be present on some
92 * TQM834x boards.
93 */
94static struct mtd_partition tqm834x_partitions_bank2[] = {
95 {
96 .name = "jffs2", /* jffs2 filesystem */
97 .offset = 0x00000000,
98 .size = 0x00400000, /* whole device */
99 /* NOTE: this parttion size is re-calcated in */
100 /* init_tqm834x_mtd() to cover actual device size. */
101 },
102};
103
104#endif /* CONFIG_MTD_PARTITIONS */
105
106static int __init init_tqm834x_mtd(void)
107{
108 int idx = 0, ret = 0;
109 unsigned long flash_addr, flash_size, mtd_size = 0;
110
111 /* pointer to TQM834x board info data */
112 bd_t *bd = (bd_t *)__res;
113#ifdef CONFIG_MTD_CMDLINE_PARTS
114 int n;
115 char mtdid[4];
116 const char *part_probes[] = { "cmdlinepart", NULL };
117#endif
118
119 flash_addr = bd->bi_flashstart;
120 flash_size = bd->bi_flashsize;
121
122 /* request maximum flash size address space */
123 start_scan_addr = (unsigned long)ioremap(flash_addr, flash_size);
124 if (!start_scan_addr) {
125 printk("%s: Failed to ioremap address: 0x%lx\n",
126 __FUNCTION__, flash_addr);
127 return -EIO;
128 }
129
130 for(idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
131 if (mtd_size >= flash_size)
132 break;
133
134 pr_debug("%s: chip probing count %d\n", __FUNCTION__, idx);
135
136 map_banks[idx] =
137 (struct map_info *)kmalloc(sizeof(struct map_info),
138 GFP_KERNEL);
139 if (map_banks[idx] == NULL) {
140 ret = -ENOMEM;
141 goto error_mem;
142 }
143 memset((void *)map_banks[idx], 0, sizeof(struct map_info));
144 map_banks[idx]->name = (char *)kmalloc(16, GFP_KERNEL);
145 if (map_banks[idx]->name == NULL) {
146 ret = -ENOMEM;
147 goto error_mem;
148 }
149 memset((void *)map_banks[idx]->name, 0, 16);
150
151 sprintf(map_banks[idx]->name, "TQM834x-%d", idx);
152 map_banks[idx]->size = flash_size;
153 map_banks[idx]->bankwidth = 4;
154
155 simple_map_init(map_banks[idx]);
156
157 map_banks[idx]->virt = (void __iomem *)
158 (start_scan_addr + ((idx > 0) ?
159 (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0));
160 map_banks[idx]->phys =
161 flash_addr + ((idx > 0) ?
162 (mtd_banks[idx-1] ? mtd_banks[idx-1]->size : 0) : 0);
163
164 /* start to probe flash chips */
165 mtd_banks[idx] = do_map_probe("cfi_probe", map_banks[idx]);
166 if (mtd_banks[idx]) {
167 mtd_banks[idx]->owner = THIS_MODULE;
168 mtd_size += mtd_banks[idx]->size;
169 num_banks++;
170 pr_debug("%s: bank %ld, name: %s, size: %d bytes \n",
171 __FUNCTION__, num_banks,
172 mtd_banks[idx]->name, mtd_banks[idx]->size);
173 }
174 }
175
176 /* no supported flash chips found */
177 if (!num_banks) {
178 printk("TQM834x: No supported flash chips found!\n");
179 ret = -ENXIO;
180 goto error_mem;
181 }
182
183#ifdef CONFIG_MTD_PARTITIONS
184 /*
185 * Select static partition definitions
186 */
187 n = ARRAY_SIZE(tqm834x_partitions_bank1);
188 part_banks[0].mtd_part = tqm834x_partitions_bank1;
189 part_banks[0].type = "static image bank1";
190 part_banks[0].nums = n;
191
192 /* update last partition size to cover actual remaining space */
193 tqm834x_partitions_bank1[n - 1].size =
194 mtd_banks[0]->size -
195 tqm834x_partitions_bank1[n - 1].offset;
196
197 /* check if we have second bank? */
198 if (num_banks == 2) {
199 n = ARRAY_SIZE(tqm834x_partitions_bank2);
200 part_banks[1].mtd_part = tqm834x_partitions_bank2;
201 part_banks[1].type = "static image bank2";
202 part_banks[1].nums = n;
203
204 /* update last partition size to cover actual remaining space */
205 tqm834x_partitions_bank2[n - 1].size =
206 mtd_banks[1]->size -
207 tqm834x_partitions_bank2[n - 1].offset;
208 }
209
210 for(idx = 0; idx < num_banks ; idx++) {
211#ifdef CONFIG_MTD_CMDLINE_PARTS
212 sprintf(mtdid, "%d", idx);
213 n = parse_mtd_partitions(mtd_banks[idx],
214 part_probes,
215 &part_banks[idx].mtd_part,
216 0);
217 pr_debug("%s: %d command line partitions on bank %s\n",
218 __FUNCTION__, n, mtdid);
219 if (n > 0) {
220 part_banks[idx].type = "command line";
221 part_banks[idx].nums = n;
222 }
223#endif /* CONFIG_MTD_CMDLINE_PARTS */
224 if (part_banks[idx].nums == 0) {
225 printk(KERN_NOTICE
226 "TQM834x flash bank %d: no partition info "
227 "available, registering whole device\n", idx);
228 add_mtd_device(mtd_banks[idx]);
229 } else {
230 printk(KERN_NOTICE
231 "TQM834x flash bank %d: Using %s partition "
232 "definition\n", idx, part_banks[idx].type);
233 add_mtd_partitions(mtd_banks[idx],
234 part_banks[idx].mtd_part,
235 part_banks[idx].nums);
236 }
237 }
238#else /* ! CONFIG_MTD_PARTITIONS */
239 printk(KERN_NOTICE "TQM834x flash: registering %d flash banks "
240 "at once\n", num_banks);
241
242 for(idx = 0 ; idx < num_banks ; idx++)
243 add_mtd_device(mtd_banks[idx]);
244
245#endif /* CONFIG_MTD_PARTITIONS */
246
247 return 0;
248error_mem:
249 for (idx = 0 ; idx < FLASH_BANK_MAX ; idx++) {
250 if (map_banks[idx] != NULL) {
251 if (map_banks[idx]->name != NULL) {
252 kfree(map_banks[idx]->name);
253 map_banks[idx]->name = NULL;
254 }
255 kfree(map_banks[idx]);
256 map_banks[idx] = NULL;
257 }
258 }
259
260 iounmap((void *)start_scan_addr);
261
262 return ret;
263}
264
265static void __exit cleanup_tqm834x_mtd(void)
266{
267 unsigned int idx = 0;
268 for(idx = 0 ; idx < num_banks ; idx++) {
269 /* destroy mtd_info previously allocated */
270 if (mtd_banks[idx]) {
271 del_mtd_partitions(mtd_banks[idx]);
272 map_destroy(mtd_banks[idx]);
273 }
274
275 /* release map_info not used anymore */
276 kfree(map_banks[idx]->name);
277 kfree(map_banks[idx]);
278 }
279
280 if (start_scan_addr) {
281 iounmap((void *)start_scan_addr);
282 start_scan_addr = 0;
283 }
284}
285
286module_init(init_tqm834x_mtd);
287module_exit(cleanup_tqm834x_mtd);
288
289MODULE_LICENSE("GPL");
290MODULE_AUTHOR("Wolfgang Denk <wd@denx.de>");
291MODULE_DESCRIPTION("MTD map driver for TQM834x boards");