Merge branch 'master'
[linux-2.6] / drivers / mtd / maps / cstm_mips_ixx.c
1 /*
2  * $Id: cstm_mips_ixx.c,v 1.14 2005/11/07 11:14:26 gleixner Exp $
3  *
4  * Mapping of a custom board with both AMD CFI and JEDEC flash in partitions.
5  * Config with both CFI and JEDEC device support.
6  *
7  * Basically physmap.c with the addition of partitions and
8  * an array of mapping info to accomodate more than one flash type per board.
9  *
10  * Copyright 2000 MontaVista Software Inc.
11  *
12  *  This program is free software; you can redistribute  it and/or modify it
13  *  under  the terms of  the GNU General  Public License as published by the
14  *  Free Software Foundation;  either version 2 of the  License, or (at your
15  *  option) any later version.
16  *
17  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
18  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
19  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
20  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
21  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
23  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
25  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27  *
28  *  You should have received a copy of the  GNU General Public License along
29  *  with this program; if not, write  to the Free Software Foundation, Inc.,
30  *  675 Mass Ave, Cambridge, MA 02139, USA.
31  */
32
33 #include <linux/module.h>
34 #include <linux/types.h>
35 #include <linux/kernel.h>
36 #include <linux/init.h>
37 #include <asm/io.h>
38 #include <linux/mtd/mtd.h>
39 #include <linux/mtd/map.h>
40 #include <linux/mtd/partitions.h>
41 #include <linux/config.h>
42 #include <linux/delay.h>
43
44 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
45 #define CC_GCR             0xB4013818
46 #define CC_GPBCR           0xB401380A
47 #define CC_GPBDR           0xB4013808
48 #define CC_M68K_DEVICE     1
49 #define CC_M68K_FUNCTION   6
50 #define CC_CONFADDR        0xB8004000
51 #define CC_CONFDATA        0xB8004004
52 #define CC_FC_FCR          0xB8002004
53 #define CC_FC_DCR          0xB8002008
54 #define CC_GPACR           0xB4013802
55 #define CC_GPAICR          0xB4013804
56 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
57
58 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
59 void cstm_mips_ixx_set_vpp(struct map_info *map,int vpp)
60 {
61         static DEFINE_SPINLOCK(vpp_lock);
62         static int vpp_count = 0;
63         unsigned long flags;
64
65         spin_lock_irqsave(&vpp_lock, flags);
66
67         if (vpp) {
68                 if (!vpp_count++) {
69                         __u16   data;
70                         __u8    data1;
71                         static u8 first = 1;
72
73                         // Set GPIO port B pin3 to high
74                         data = *(__u16 *)(CC_GPBCR);
75                         data = (data & 0xff0f) | 0x0040;
76                         *(__u16 *)CC_GPBCR = data;
77                         *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) | 0x08;
78                         if (first) {
79                                 first = 0;
80                                 /* need to have this delay for first
81                                    enabling vpp after powerup */
82                                 udelay(40);
83                         }
84                 }
85         } else {
86                 if (!--vpp_count) {
87                         __u16   data;
88
89                         // Set GPIO port B pin3 to high
90                         data = *(__u16 *)(CC_GPBCR);
91                         data = (data & 0xff3f) | 0x0040;
92                         *(__u16 *)CC_GPBCR = data;
93                         *(__u8 *)CC_GPBDR = (*(__u8*)CC_GPBDR) & 0xf7;
94                 }
95         }
96         spin_unlock_irqrestore(&vpp_lock, flags);
97 }
98 #endif
99
100 /* board and partition description */
101
102 #define MAX_PHYSMAP_PARTITIONS    8
103 struct cstm_mips_ixx_info {
104         char *name;
105         unsigned long window_addr;
106         unsigned long window_size;
107         int bankwidth;
108         int num_partitions;
109 };
110
111 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
112 #define PHYSMAP_NUMBER  1  // number of board desc structs needed, one per contiguous flash type
113 const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
114 {
115     {   // 28F128J3A in 2x16 configuration
116         "big flash",     // name
117         0x08000000,      // window_addr
118         0x02000000,      // window_size
119         4,               // bankwidth
120         1,               // num_partitions
121     }
122
123 };
124 static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
125 {   // 28F128J3A in 2x16 configuration
126         {
127                 .name = "main partition ",
128                 .size = 0x02000000, // 128 x 2 x 128k byte sectors
129                 .offset = 0,
130         },
131 },
132 };
133 #else /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
134 #define PHYSMAP_NUMBER  1  // number of board desc structs needed, one per contiguous flash type
135 const struct cstm_mips_ixx_info cstm_mips_ixx_board_desc[PHYSMAP_NUMBER] =
136 {
137     {
138         "MTD flash",                   // name
139         CONFIG_MTD_CSTM_MIPS_IXX_START,      // window_addr
140         CONFIG_MTD_CSTM_MIPS_IXX_LEN,        // window_size
141         CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH,   // bankwidth
142         1,                             // num_partitions
143     },
144
145 };
146 static struct mtd_partition cstm_mips_ixx_partitions[PHYSMAP_NUMBER][MAX_PHYSMAP_PARTITIONS] = {
147 {
148         {
149                 .name = "main partition",
150                 .size =  CONFIG_MTD_CSTM_MIPS_IXX_LEN,
151                 .offset = 0,
152         },
153 },
154 };
155 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
156
157 struct map_info cstm_mips_ixx_map[PHYSMAP_NUMBER];
158
159 int __init init_cstm_mips_ixx(void)
160 {
161         int i;
162         int jedec;
163         struct mtd_info *mymtd;
164         struct mtd_partition *parts;
165
166         /* Initialize mapping */
167         for (i=0;i<PHYSMAP_NUMBER;i++) {
168                 printk(KERN_NOTICE "cstm_mips_ixx flash device: 0x%lx at 0x%lx\n",
169                        cstm_mips_ixx_board_desc[i].window_size, cstm_mips_ixx_board_desc[i].window_addr);
170
171
172                 cstm_mips_ixx_map[i].phys = cstm_mips_ixx_board_desc[i].window_addr;
173                 cstm_mips_ixx_map[i].virt = ioremap(cstm_mips_ixx_board_desc[i].window_addr, cstm_mips_ixx_board_desc[i].window_size);
174                 if (!cstm_mips_ixx_map[i].virt) {
175                         printk(KERN_WARNING "Failed to ioremap\n");
176                         return -EIO;
177                 }
178                 cstm_mips_ixx_map[i].name = cstm_mips_ixx_board_desc[i].name;
179                 cstm_mips_ixx_map[i].size = cstm_mips_ixx_board_desc[i].window_size;
180                 cstm_mips_ixx_map[i].bankwidth = cstm_mips_ixx_board_desc[i].bankwidth;
181 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
182                 cstm_mips_ixx_map[i].set_vpp = cstm_mips_ixx_set_vpp;
183 #endif
184                 simple_map_init(&cstm_mips_ixx_map[i]);
185                 //printk(KERN_NOTICE "cstm_mips_ixx: ioremap is %x\n",(unsigned int)(cstm_mips_ixx_map[i].virt));
186         }
187
188 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
189         setup_ITE_IVR_flash();
190 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
191
192         for (i=0;i<PHYSMAP_NUMBER;i++) {
193                 parts = &cstm_mips_ixx_partitions[i][0];
194                 jedec = 0;
195                 mymtd = (struct mtd_info *)do_map_probe("cfi_probe", &cstm_mips_ixx_map[i]);
196                 //printk(KERN_NOTICE "phymap %d cfi_probe: mymtd is %x\n",i,(unsigned int)mymtd);
197                 if (!mymtd) {
198                         jedec = 1;
199                         mymtd = (struct mtd_info *)do_map_probe("jedec", &cstm_mips_ixx_map[i]);
200                         printk(KERN_NOTICE "cstm_mips_ixx %d jedec: mymtd is %x\n",i,(unsigned int)mymtd);
201                 }
202                 if (mymtd) {
203                         mymtd->owner = THIS_MODULE;
204
205                         cstm_mips_ixx_map[i].map_priv_2 = (unsigned long)mymtd;
206                         add_mtd_partitions(mymtd, parts, cstm_mips_ixx_board_desc[i].num_partitions);
207                 }
208                 else
209                    return -ENXIO;
210         }
211         return 0;
212 }
213
214 static void __exit cleanup_cstm_mips_ixx(void)
215 {
216         int i;
217         struct mtd_info *mymtd;
218
219         for (i=0;i<PHYSMAP_NUMBER;i++) {
220                 mymtd = (struct mtd_info *)cstm_mips_ixx_map[i].map_priv_2;
221                 if (mymtd) {
222                         del_mtd_partitions(mymtd);
223                         map_destroy(mymtd);
224                 }
225                 if (cstm_mips_ixx_map[i].virt) {
226                         iounmap((void *)cstm_mips_ixx_map[i].virt);
227                         cstm_mips_ixx_map[i].virt = 0;
228                 }
229         }
230 }
231 #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR)
232 void PCISetULongByOffset(__u32 DevNumber, __u32 FuncNumber, __u32 Offset, __u32 data)
233 {
234         __u32   offset;
235
236         offset = ( unsigned long )( 0x80000000 | ( DevNumber << 11 ) + ( FuncNumber << 8 ) + Offset) ;
237
238         *(__u32 *)CC_CONFADDR = offset;
239         *(__u32 *)CC_CONFDATA = data;
240 }
241 void setup_ITE_IVR_flash()
242 {
243                 __u32   size, base;
244
245                 size = 0x0e000000;              // 32MiB
246                 base = (0x08000000) >> 8 >>1; // Bug: we must shift one more bit
247
248                 /* need to set ITE flash to 32 bits instead of default 8 */
249 #ifdef CONFIG_MIPS_IVR
250                 *(__u32 *)CC_FC_FCR = 0x55;
251                 *(__u32 *)CC_GPACR = 0xfffc;
252 #else
253                 *(__u32 *)CC_FC_FCR = 0x77;
254 #endif
255                 /* turn bursting off */
256                 *(__u32 *)CC_FC_DCR = 0x0;
257
258                 /* setup for one chip 4 byte PCI access */
259                 PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x60, size | base);
260                 PCISetULongByOffset(CC_M68K_DEVICE, CC_M68K_FUNCTION, 0x64, 0x02);
261 }
262 #endif /* defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) */
263
264 module_init(init_cstm_mips_ixx);
265 module_exit(cleanup_cstm_mips_ixx);
266
267
268 MODULE_LICENSE("GPL");
269 MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
270 MODULE_DESCRIPTION("MTD map driver for ITE 8172G and Globespan IVR boards");