summaryrefslogtreecommitdiff
path: root/packages/linux/linux-2.6.24/gesbc-9302/0001-gesbc-nand.patch
blob: 399bc43d31e2d17275e828be28d0b97b8f4beca7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
From 30026f5e13ac18daeeea1a3fd4ab06aa2961ef23 Mon Sep 17 00:00:00 2001
From: Cliff Brake <cbrake@happy.(none)>
Date: Mon, 17 Dec 2007 16:45:47 -0500
Subject: [PATCH] gesbc-nand

---
 drivers/mtd/nand/Kconfig  |    7 ++
 drivers/mtd/nand/Makefile |    1 +
 drivers/mtd/nand/gesbc.c  |  255 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 263 insertions(+), 0 deletions(-)
 create mode 100644 drivers/mtd/nand/gesbc.c

diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 246d451..cde3146 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -51,6 +51,13 @@ config MTD_NAND_EDB7312
 	  This enables the driver for the Cirrus Logic EBD7312 evaluation
 	  board to access the onboard NAND Flash.
 
+config MTD_NAND_GESBC
+	tristate "Support for Glomation GESBC-93xx board"
+	depends on MTD_NAND && MACH_EDB9302
+	help
+	  This enables the driver for the Glomation GESBC-93xx
+	  board to access the onboard NAND Flash.
+
 config MTD_NAND_H1900
 	tristate "iPAQ H1900 flash"
 	depends on ARCH_PXA && MTD_PARTITIONS
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 3ad6c01..58c1961 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_MTD_NAND_AMS_DELTA)	+= ams-delta.o
 obj-$(CONFIG_MTD_NAND_TOTO)		+= toto.o
 obj-$(CONFIG_MTD_NAND_AUTCPU12)		+= autcpu12.o
 obj-$(CONFIG_MTD_NAND_EDB7312)		+= edb7312.o
+obj-$(CONFIG_MTD_NAND_GESBC)		+= gesbc.o
 obj-$(CONFIG_MTD_NAND_AU1550)		+= au1550nd.o
 obj-$(CONFIG_MTD_NAND_BF5XX)		+= bf5xx_nand.o
 obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB)	+= ppchameleonevb.o
diff --git a/drivers/mtd/nand/gesbc.c b/drivers/mtd/nand/gesbc.c
new file mode 100644
index 0000000..a5844b1
--- /dev/null
+++ b/drivers/mtd/nand/gesbc.c
@@ -0,0 +1,255 @@
+/*
+ *  drivers/mtd/nand/gesbc-9302.c
+ *
+ *  Copyright (C) 2004 Glomation (support@glomationinc.com)
+ *
+ *  Derived from drivers/mtd/nand/edb7312.c
+ *       Copyright (C) 2004 Marius Grer (mag@sysgo.de)
+ *
+ *  Derived from drivers/mtd/nand/autcpu12.c
+ *       Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ *  Overview:
+ *   This is a device driver for the NAND flash device found on the
+ *   GESBC-93xx board with Samsung 128/256/512 Mbyte part.
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+#include <asm/arch/hardware.h>
+#include <asm/sizes.h>
+
+#define GESBC_NAND_FLASH_DATA 0x10000000
+
+#define GPIO_PADR	EP93XX_GPIO_REG(0x0)
+#define GPIO_PADDR	EP93XX_GPIO_REG(0x10)
+#define SMCBCR1		(EP93XX_AHB_VIRT_BASE + 0x00082000 + 0x04)
+
+/*
+ * MTD structure for GESBC-93xx board
+ */
+static struct mtd_info *gesbc_mtd = NULL;
+
+
+/*
+ * Module stuff
+ */
+static unsigned long gesbc_fio_pbase = GESBC_NAND_FLASH_DATA;
+
+#ifdef CONFIG_MTD_PARTITIONS
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info32[] = {
+	{ .name= "GESBC NAND FLASH",
+		  .offset= 0,
+		  .size= 128*1024*1024 },
+};
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info128[] = {
+	{ .name= "GESBC NAND FLASH",
+		  .offset= 0,
+		  .size= 128*1024*1024 },
+};
+
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info256[] = {
+	{ .name= "GESBC NAND FLASH",
+		  .offset= 0,
+		  .size= 256*1024*1024 },
+};
+
+/*
+ * Define static partitions for flash device
+ */
+static struct mtd_partition partition_info512[] = {
+	{ .name= "GESBC NAND FLASH",
+		  .offset= 0,
+		  .size= 512*1024*1024 },
+};
+
+#define NUM_PARTITIONS 1
+#endif
+
+
+/* 
+ *	hardware specific access to control-lines
+ *      NAND_NCE: bit 0 -> bit 3
+ *      NAND_CLE: bit 1 -> bit 4
+ *      NAND_ALE: bit 2 -> bit 6
+ */
+static void gesbc_hwcontrol(struct mtd_info *mtd, int cmd, int ctrl) 
+{
+	unsigned long flags;
+        struct nand_chip *chip = mtd->priv;
+
+	/* Disbale interrupt to avoid race condition */
+	local_irq_save(flags);
+
+        if (ctrl & NAND_CTRL_CHANGE) {
+                unsigned char bits;
+
+                bits = (ctrl & NAND_CLE) << 3;
+                bits |= (ctrl & NAND_ALE) << 4;
+		if (ctrl & NAND_NCE)
+			bits &= ~0x08;
+		else
+			bits |= 0x08;
+
+		__raw_writel( (__raw_readl(GPIO_PADR) & ~0x58 )| bits, GPIO_PADR);
+        }
+        if (cmd != NAND_CMD_NONE)
+                writeb(cmd, chip->IO_ADDR_W);
+	/* Restore interrupt state */
+	local_irq_restore(flags);
+}
+
+/*
+ *	read device ready pin
+ */
+static int gesbc_device_ready(struct mtd_info *mtd)
+{
+	return  (__raw_readl(GPIO_PADR) & 0x80) >> 7;
+}
+
+#define MTDID      "s3c2440-nand"
+
+static const char *probes[] = { "cmdlinepart", NULL };
+
+
+
+/*
+ * Main initialization routine
+ */
+static int __init gesbc_nand_init (void)
+{
+	struct nand_chip *this;
+	const char *part_type = 0;
+	int mtd_parts_nb = 0;
+	struct mtd_partition *mtd_parts = 0;
+	unsigned long flags;
+	void * gesbc_fio_base;
+
+	/* Allocate memory for MTD device structure and private data */
+	gesbc_mtd = kmalloc(sizeof(struct mtd_info) + 
+			     sizeof(struct nand_chip),
+			     GFP_KERNEL);
+	if (!gesbc_mtd) {
+		printk("Unable to allocate GESBC NAND MTD device structure.\n");
+		return -ENOMEM;
+	}
+
+	/* map physical adress */
+	gesbc_fio_base = ioremap(gesbc_fio_pbase, SZ_1K);
+	if(!gesbc_fio_base) {
+		printk("ioremap GESBC-93xx NAND flash failed\n");
+		kfree(gesbc_mtd);
+		return -EIO;
+	}
+
+	
+	/* Get pointer to private data */
+	this = (struct nand_chip *) (&gesbc_mtd[1]);
+	
+	/* Initialize structures */
+	memset((char *) gesbc_mtd, 0, sizeof(struct mtd_info));
+	memset((char *) this, 0, sizeof(struct nand_chip));
+
+	/* Link the private data with the MTD structure */
+	gesbc_mtd->priv = this;
+
+	/* Disbale interrupt to avoid race condition */
+	local_irq_save(flags);
+
+	/*
+	 * Set GPIO Port A control register so that the pins are configured
+	 * to be outputs for controlling the NAND flash.
+	 */
+	__raw_writel((__raw_readl(GPIO_PADDR) | 0x58) & ~0x80, GPIO_PADDR);
+	/* Clear NCE, clear CLE, clear ALE */
+	__raw_writel( (__raw_readl(GPIO_PADR) | 0x08 ) & ~0x50, GPIO_PADR);
+	/* Set SRAM controller to 32 bit (8 bit just doesn't work, don't know why) bus width and 7 CLK wait state */
+	__raw_writel(0x10003ce0, SMCBCR1);
+	local_irq_restore(flags);
+
+	
+	/* insert callbacks */
+	this->IO_ADDR_R = (void *) gesbc_fio_base;
+	this->IO_ADDR_W = (void *) gesbc_fio_base;
+	this->cmd_ctrl = (void *) gesbc_hwcontrol;
+	this->dev_ready = gesbc_device_ready;
+	this->chip_delay = 25;
+	this->ecc.mode = NAND_ECC_SOFT;
+	
+	__raw_writel(0xffffffff, gesbc_fio_base);
+	printk("Searching for NAND flash...\n");
+	/* Scan to find existence of the device */
+	if (nand_scan (gesbc_mtd, 1)) {
+		iounmap((void *)gesbc_fio_base);
+		kfree (gesbc_mtd);
+		return -ENXIO;
+	}
+
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+        gesbc_mtd->name="GESBC-NAND";
+        mtd_parts_nb = parse_mtd_partitions(gesbc_mtd,  probes, &mtd_parts, 0);
+        if (mtd_parts_nb > 0)
+                part_type = "command line";
+        else
+                mtd_parts_nb = 0;
+#endif
+
+	if (mtd_parts_nb == 0)
+	{
+		mtd_parts_nb = NUM_PARTITIONS;
+		mtd_parts = partition_info32;
+		if (gesbc_mtd->size >= (128 * 0x100000))
+			mtd_parts = partition_info128;
+		if (gesbc_mtd->size >= (256 * 0x100000))
+			mtd_parts = partition_info256;
+		if (gesbc_mtd->size >= (512 * 0x100000))
+			mtd_parts = partition_info512;
+		part_type = "static";
+	}
+	
+	/* Register the partitions */
+	printk(KERN_NOTICE "Using %s partition definition\n", part_type);
+	add_mtd_partitions(gesbc_mtd, mtd_parts, mtd_parts_nb);
+	
+	/* Return happy */
+	return 0;
+}
+module_init(gesbc_nand_init);
+
+/*
+ * Clean up routine
+ */
+static void __exit gesbc_nand_cleanup (void)
+{
+/*	struct nand_chip *this = (struct nand_chip *) &gesbc_mtd[1]; */
+	
+	/* Unregister the device */
+	del_mtd_device (gesbc_mtd);
+	
+	/* Free the MTD device structure */
+	kfree (gesbc_mtd);
+}
+module_exit(gesbc_nand_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("zql@glomationinc.com");
+MODULE_DESCRIPTION("MTD map driver for Glomation GESBC-93xx board");
+
-- 
1.5.4.rc4