Merge branches 'sched-core-for-linus' and 'sched-urgent-for-linus' of git://git.kerne...
[linux-2.6.git] / arch / mips / lasat / lasat_board.c
1 /*
2  * Thomas Horsten <thh@lasat.com>
3  * Copyright (C) 2000 LASAT Networks A/S.
4  *
5  *  This program is free software; you can distribute it and/or modify it
6  *  under the terms of the GNU General Public License (Version 2) as
7  *  published by the Free Software Foundation.
8  *
9  *  This program is distributed in the hope it will be useful, but WITHOUT
10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  *  for more details.
13  *
14  *  You should have received a copy of the GNU General Public License along
15  *  with this program; if not, write to the Free Software Foundation, Inc.,
16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
17  *
18  * Routines specific to the LASAT boards
19  */
20 #include <linux/types.h>
21 #include <linux/crc32.h>
22 #include <asm/lasat/lasat.h>
23 #include <linux/kernel.h>
24 #include <linux/string.h>
25 #include <linux/ctype.h>
26 #include <linux/mutex.h>
27 #include <asm/addrspace.h>
28 #include "at93c.h"
29 /* New model description table */
30 #include "lasat_models.h"
31
32 static DEFINE_MUTEX(lasat_eeprom_mutex);
33
34 #define EEPROM_CRC(data, len) (~crc32(~0, data, len))
35
36 struct lasat_info lasat_board_info;
37
38 int EEPROMRead(unsigned int pos, unsigned char *data, int len)
39 {
40         int i;
41
42         for (i = 0; i < len; i++)
43                 *data++ = at93c_read(pos++);
44
45         return 0;
46 }
47
48 int EEPROMWrite(unsigned int pos, unsigned char *data, int len)
49 {
50         int i;
51
52         for (i = 0; i < len; i++)
53                 at93c_write(pos++, *data++);
54
55         return 0;
56 }
57
58 static void init_flash_sizes(void)
59 {
60         unsigned long *lb = lasat_board_info.li_flashpart_base;
61         unsigned long *ls = lasat_board_info.li_flashpart_size;
62         int i;
63
64         ls[LASAT_MTD_BOOTLOADER] = 0x40000;
65         ls[LASAT_MTD_SERVICE] = 0xC0000;
66         ls[LASAT_MTD_NORMAL] = 0x100000;
67
68         if (!IS_LASAT_200()) {
69                 lasat_board_info.li_flash_base = 0x1e000000;
70
71                 lb[LASAT_MTD_BOOTLOADER] = 0x1e400000;
72
73                 if (lasat_board_info.li_flash_size > 0x200000) {
74                         ls[LASAT_MTD_CONFIG] = 0x100000;
75                         ls[LASAT_MTD_FS] = 0x500000;
76                 }
77         } else {
78                 lasat_board_info.li_flash_base = 0x10000000;
79
80                 if (lasat_board_info.li_flash_size < 0x1000000) {
81                         lb[LASAT_MTD_BOOTLOADER] = 0x10000000;
82                         ls[LASAT_MTD_CONFIG] = 0x100000;
83                         if (lasat_board_info.li_flash_size >= 0x400000)
84                                 ls[LASAT_MTD_FS] =
85                                      lasat_board_info.li_flash_size - 0x300000;
86                 }
87         }
88
89         for (i = 1; i < LASAT_MTD_LAST; i++)
90                 lb[i] = lb[i-1] + ls[i-1];
91 }
92
93 int lasat_init_board_info(void)
94 {
95         int c;
96         unsigned long crc;
97         unsigned long cfg0, cfg1;
98         const struct product_info   *ppi;
99         int i_n_base_models = N_BASE_MODELS;
100         const char * const * i_txt_base_models = txt_base_models;
101         int i_n_prids = N_PRIDS;
102
103         memset(&lasat_board_info, 0, sizeof(lasat_board_info));
104
105         /* First read the EEPROM info */
106         EEPROMRead(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
107                    sizeof(struct lasat_eeprom_struct));
108
109         /* Check the CRC */
110         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
111                     sizeof(struct lasat_eeprom_struct) - 4);
112
113         if (crc != lasat_board_info.li_eeprom_info.crc32) {
114                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM CRC does "
115                        "not match calculated, attempting to soldier on...\n");
116         }
117
118         if (lasat_board_info.li_eeprom_info.version != LASAT_EEPROM_VERSION) {
119                 printk(KERN_WARNING "WARNING...\nWARNING...\nEEPROM version "
120                        "%d, wanted version %d, attempting to soldier on...\n",
121                        (unsigned int)lasat_board_info.li_eeprom_info.version,
122                        LASAT_EEPROM_VERSION);
123         }
124
125         cfg0 = lasat_board_info.li_eeprom_info.cfg[0];
126         cfg1 = lasat_board_info.li_eeprom_info.cfg[1];
127
128         if (LASAT_W0_DSCTYPE(cfg0) != 1) {
129                 printk(KERN_WARNING "WARNING...\nWARNING...\n"
130                        "Invalid configuration read from EEPROM, attempting to "
131                        "soldier on...");
132         }
133         /* We have a valid configuration */
134
135         switch (LASAT_W0_SDRAMBANKSZ(cfg0)) {
136         case 0:
137                 lasat_board_info.li_memsize = 0x0800000;
138                 break;
139         case 1:
140                 lasat_board_info.li_memsize = 0x1000000;
141                 break;
142         case 2:
143                 lasat_board_info.li_memsize = 0x2000000;
144                 break;
145         case 3:
146                 lasat_board_info.li_memsize = 0x4000000;
147                 break;
148         case 4:
149                 lasat_board_info.li_memsize = 0x8000000;
150                 break;
151         default:
152                 lasat_board_info.li_memsize = 0;
153         }
154
155         switch (LASAT_W0_SDRAMBANKS(cfg0)) {
156         case 0:
157                 break;
158         case 1:
159                 lasat_board_info.li_memsize *= 2;
160                 break;
161         default:
162                 break;
163         }
164
165         switch (LASAT_W0_BUSSPEED(cfg0)) {
166         case 0x0:
167                 lasat_board_info.li_bus_hz = 60000000;
168                 break;
169         case 0x1:
170                 lasat_board_info.li_bus_hz = 66000000;
171                 break;
172         case 0x2:
173                 lasat_board_info.li_bus_hz = 66666667;
174                 break;
175         case 0x3:
176                 lasat_board_info.li_bus_hz = 80000000;
177                 break;
178         case 0x4:
179                 lasat_board_info.li_bus_hz = 83333333;
180                 break;
181         case 0x5:
182                 lasat_board_info.li_bus_hz = 100000000;
183                 break;
184         }
185
186         switch (LASAT_W0_CPUCLK(cfg0)) {
187         case 0x0:
188                 lasat_board_info.li_cpu_hz =
189                         lasat_board_info.li_bus_hz;
190                 break;
191         case 0x1:
192                 lasat_board_info.li_cpu_hz =
193                         lasat_board_info.li_bus_hz +
194                         (lasat_board_info.li_bus_hz >> 1);
195                 break;
196         case 0x2:
197                 lasat_board_info.li_cpu_hz =
198                         lasat_board_info.li_bus_hz +
199                         lasat_board_info.li_bus_hz;
200                 break;
201         case 0x3:
202                 lasat_board_info.li_cpu_hz =
203                         lasat_board_info.li_bus_hz +
204                         lasat_board_info.li_bus_hz +
205                         (lasat_board_info.li_bus_hz >> 1);
206                 break;
207         case 0x4:
208                 lasat_board_info.li_cpu_hz =
209                         lasat_board_info.li_bus_hz +
210                         lasat_board_info.li_bus_hz +
211                         lasat_board_info.li_bus_hz;
212                 break;
213         }
214
215         /* Flash size */
216         switch (LASAT_W1_FLASHSIZE(cfg1)) {
217         case 0:
218                 lasat_board_info.li_flash_size = 0x200000;
219                 break;
220         case 1:
221                 lasat_board_info.li_flash_size = 0x400000;
222                 break;
223         case 2:
224                 lasat_board_info.li_flash_size = 0x800000;
225                 break;
226         case 3:
227                 lasat_board_info.li_flash_size = 0x1000000;
228                 break;
229         case 4:
230                 lasat_board_info.li_flash_size = 0x2000000;
231                 break;
232         }
233
234         init_flash_sizes();
235
236         lasat_board_info.li_bmid = LASAT_W0_BMID(cfg0);
237         lasat_board_info.li_prid = lasat_board_info.li_eeprom_info.prid;
238         if (lasat_board_info.li_prid == 0xffff || lasat_board_info.li_prid == 0)
239                 lasat_board_info.li_prid = lasat_board_info.li_bmid;
240
241         /* Base model stuff */
242         if (lasat_board_info.li_bmid > i_n_base_models)
243                 lasat_board_info.li_bmid = i_n_base_models;
244         strcpy(lasat_board_info.li_bmstr,
245                i_txt_base_models[lasat_board_info.li_bmid]);
246
247         /* Product ID dependent values */
248         c = lasat_board_info.li_prid;
249         if (c >= i_n_prids) {
250                 strcpy(lasat_board_info.li_namestr, "Unknown Model");
251                 strcpy(lasat_board_info.li_typestr, "Unknown Type");
252         } else {
253                 ppi = &vendor_info_table[0].vi_product_info[c];
254                 strcpy(lasat_board_info.li_namestr, ppi->pi_name);
255                 if (ppi->pi_type)
256                         strcpy(lasat_board_info.li_typestr, ppi->pi_type);
257                 else
258                         sprintf(lasat_board_info.li_typestr, "%d", 10 * c);
259         }
260
261         return 0;
262 }
263
264 void lasat_write_eeprom_info(void)
265 {
266         unsigned long crc;
267
268         mutex_lock(&lasat_eeprom_mutex);
269
270         /* Generate the CRC */
271         crc = EEPROM_CRC((unsigned char *)(&lasat_board_info.li_eeprom_info),
272                     sizeof(struct lasat_eeprom_struct) - 4);
273         lasat_board_info.li_eeprom_info.crc32 = crc;
274
275         /* Write the EEPROM info */
276         EEPROMWrite(0, (unsigned char *)&lasat_board_info.li_eeprom_info,
277                     sizeof(struct lasat_eeprom_struct));
278
279         mutex_unlock(&lasat_eeprom_mutex);
280 }