1 /*
2 * drivers/mtd/autcpu12.c
3 *
4 * Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
5 *
6 * Derived from drivers/mtd/spia.c
7 * Copyright (C) 2000 Steven J. Hill (sjhill@cotw.com)
8 *
9 * $Id: autcpu12.c,v 1.6 2002/11/11 15:47:56 gleixner Exp $
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * Overview:
16 * This is a device driver for the NAND flash device found on the
17 * autronix autcpu12 board, which is a SmartMediaCard. It supports
18 * 16MB, 32MB and 64MB cards.
19 *
20 *
21 * 02-12-2002 TG Cleanup of module params
22 *
23 * 02-20-2002 TG adjusted for different rd/wr adress support
24 * added support for read device ready/busy line
25 * added page_cache
26 *
27 * 10-06-2002 TG 128K card support added
28 *
29 */
30
31 #include <linux/slab.h>
32 #include <linux/module.h>
33 #include <linux/mtd/mtd.h>
34 #include <linux/mtd/nand.h>
35 #include <linux/mtd/partitions.h>
36 #include <asm/io.h>
37 #include <asm/arch/hardware.h>
38 #include <asm/sizes.h>
39 #include <asm/arch/autcpu12.h>
40
41 /*
42 * MTD structure for AUTCPU12 board
43 */
44 static struct mtd_info *autcpu12_mtd = NULL;
45
46 /*
47 * Module stuff
48 */
49 #if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
50 #define autcpu12_init init_module
51 #define autcpu12_cleanup cleanup_module
52 #endif
53
54 static int autcpu12_io_base = CS89712_VIRT_BASE;
55 static int autcpu12_fio_pbase = AUTCPU12_PHYS_SMC;
56 static int autcpu12_fio_ctrl = AUTCPU12_SMC_SELECT_OFFSET;
57 static int autcpu12_pedr = AUTCPU12_SMC_PORT_OFFSET;
58 static int autcpu12_fio_base;
59
60 #ifdef MODULE
61 MODULE_PARM(autcpu12_fio_pbase, "i");
62 MODULE_PARM(autcpu12_fio_ctrl, "i");
63 MODULE_PARM(autcpu12_pedr, "i");
64
65 __setup("autcpu12_fio_pbase=",autcpu12_fio_pbase);
66 __setup("autcpu12_fio_ctrl=",autcpu12_fio_ctrl);
67 __setup("autcpu12_pedr=",autcpu12_pedr);
68 #endif
69
70 /*
71 * Define partitions for flash devices
72 */
73
74 static struct mtd_partition partition_info16k[] = {
75 { name: "AUTCPU12 flash partition 1",
76 offset: 0,
77 size: 8 * SZ_1M },
78 { name: "AUTCPU12 flash partition 2",
79 offset: 8 * SZ_1M,
80 size: 8 * SZ_1M },
81 };
82
83 static struct mtd_partition partition_info32k[] = {
84 { name: "AUTCPU12 flash partition 1",
85 offset: 0,
86 size: 8 * SZ_1M },
87 { name: "AUTCPU12 flash partition 2",
88 offset: 8 * SZ_1M,
89 size: 24 * SZ_1M },
90 };
91
92 static struct mtd_partition partition_info64k[] = {
93 { name: "AUTCPU12 flash partition 1",
94 offset: 0,
95 size: 16 * SZ_1M },
96 { name: "AUTCPU12 flash partition 2",
97 offset: 16 * SZ_1M,
98 size: 48 * SZ_1M},
99 };
100
101 static struct mtd_partition partition_info128k[] = {
102 { name: "AUTCPU12 flash partition 1",
103 offset: 0,
104 size: 16 * SZ_1M },
105 { name: "AUTCPU12 flash partition 2",
106 offset: 16 * SZ_1M,
107 size: 112 * SZ_1M},
108 };
109
110 #define NUM_PARTITIONS16K 2
111 #define NUM_PARTITIONS32K 2
112 #define NUM_PARTITIONS64K 2
113 #define NUM_PARTITIONS128K 2
114 /*
115 * hardware specific access to control-lines
116 */
autcpu12_hwcontrol(int cmd)117 void autcpu12_hwcontrol(int cmd)
118 {
119
120 switch(cmd){
121
122 case NAND_CTL_SETCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_CLE; break;
123 case NAND_CTL_CLRCLE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_CLE; break;
124
125 case NAND_CTL_SETALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) |= AUTCPU12_SMC_ALE; break;
126 case NAND_CTL_CLRALE: (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) &= ~AUTCPU12_SMC_ALE; break;
127
128 case NAND_CTL_SETNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x01; break;
129 case NAND_CTL_CLRNCE: (*(volatile unsigned char *) (autcpu12_fio_base + autcpu12_fio_ctrl)) = 0x00; break;
130 }
131 }
132
133 /*
134 * read device ready pin
135 */
autcpu12_device_ready(void)136 int autcpu12_device_ready(void)
137 {
138
139 return ( (*(volatile unsigned char *) (autcpu12_io_base + autcpu12_pedr)) & AUTCPU12_SMC_RDY) ? 1 : 0;
140
141 }
142 /*
143 * Main initialization routine
144 */
autcpu12_init(void)145 int __init autcpu12_init (void)
146 {
147 struct nand_chip *this;
148 int err = 0;
149
150 /* Allocate memory for MTD device structure and private data */
151 autcpu12_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
152 GFP_KERNEL);
153 if (!autcpu12_mtd) {
154 printk ("Unable to allocate AUTCPU12 NAND MTD device structure.\n");
155 err = -ENOMEM;
156 goto out;
157 }
158
159 /* map physical adress */
160 autcpu12_fio_base=(unsigned long)ioremap(autcpu12_fio_pbase,SZ_1K);
161 if(!autcpu12_fio_base){
162 printk("Ioremap autcpu12 SmartMedia Card failed\n");
163 err = -EIO;
164 goto out_mtd;
165 }
166
167 /* Get pointer to private data */
168 this = (struct nand_chip *) (&autcpu12_mtd[1]);
169
170 /* Initialize structures */
171 memset((char *) autcpu12_mtd, 0, sizeof(struct mtd_info));
172 memset((char *) this, 0, sizeof(struct nand_chip));
173
174 /* Link the private data with the MTD structure */
175 autcpu12_mtd->priv = this;
176
177 /* Set address of NAND IO lines */
178 this->IO_ADDR_R = autcpu12_fio_base;
179 this->IO_ADDR_W = autcpu12_fio_base;
180 this->hwcontrol = autcpu12_hwcontrol;
181 this->dev_ready = autcpu12_device_ready;
182 /* 20 us command delay time */
183 this->chip_delay = 20;
184 this->eccmode = NAND_ECC_SOFT;
185
186 /* Scan to find existance of the device */
187 if (nand_scan (autcpu12_mtd)) {
188 err = -ENXIO;
189 goto out_ior;
190 }
191
192 /* Allocate memory for internal data buffer */
193 this->data_buf = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
194 if (!this->data_buf) {
195 printk ("Unable to allocate NAND data buffer for AUTCPU12.\n");
196 err = -ENOMEM;
197 goto out_ior;
198 }
199
200 /* Allocate memory for internal data buffer */
201 this->data_cache = kmalloc (sizeof(u_char) * (autcpu12_mtd->oobblock + autcpu12_mtd->oobsize), GFP_KERNEL);
202 if (!this->data_cache) {
203 printk ("Unable to allocate NAND data cache for AUTCPU12.\n");
204 err = -ENOMEM;
205 goto out_buf;
206 }
207 this->cache_page = -1;
208
209 /* Register the partitions */
210 switch(autcpu12_mtd->size){
211 case SZ_16M: add_mtd_partitions(autcpu12_mtd, partition_info16k, NUM_PARTITIONS16K); break;
212 case SZ_32M: add_mtd_partitions(autcpu12_mtd, partition_info32k, NUM_PARTITIONS32K); break;
213 case SZ_64M: add_mtd_partitions(autcpu12_mtd, partition_info64k, NUM_PARTITIONS64K); break;
214 case SZ_128M: add_mtd_partitions(autcpu12_mtd, partition_info128k, NUM_PARTITIONS128K); break;
215 default: {
216 printk ("Unsupported SmartMedia device\n");
217 err = -ENXIO;
218 goto out_cac;
219 }
220 }
221 goto out;
222
223 out_cac:
224 kfree (this->data_cache);
225 out_buf:
226 kfree (this->data_buf);
227 out_ior:
228 iounmap((void *)autcpu12_fio_base);
229 out_mtd:
230 kfree (autcpu12_mtd);
231 out:
232 return err;
233 }
234
235 module_init(autcpu12_init);
236
237 /*
238 * Clean up routine
239 */
240 #ifdef MODULE
autcpu12_cleanup(void)241 static void __exit autcpu12_cleanup (void)
242 {
243 struct nand_chip *this = (struct nand_chip *) &autcpu12_mtd[1];
244
245 /* Unregister partitions */
246 del_mtd_partitions(autcpu12_mtd);
247
248 /* Unregister the device */
249 del_mtd_device (autcpu12_mtd);
250
251 /* Free internal data buffers */
252 kfree (this->data_buf);
253 kfree (this->data_cache);
254
255 /* unmap physical adress */
256 iounmap((void *)autcpu12_fio_base);
257
258 /* Free the MTD device structure */
259 kfree (autcpu12_mtd);
260 }
261 module_exit(autcpu12_cleanup);
262 #endif
263
264 MODULE_LICENSE("GPL");
265 MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
266 MODULE_DESCRIPTION("Glue layer for SmartMediaCard on autronix autcpu12");
267