source: SVN/rincon/u-boot/board/scb9328/flash.c @ 55

Last change on this file since 55 was 55, checked in by Tim Harvey, 2 years ago

rincon: added latest u-boot source

restored form server backup

Signed-off-by: Tim Harvey <tharvey@…>

File size: 8.1 KB
Line 
1/*
2 * Copyright (C) 2003 ETC s.r.o.
3 *
4 * This code was inspired by Marius Groeger and Kyle Harris code
5 * available in other board ports for U-Boot
6 *
7 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 *
25 * Written by Peter Figuli <peposh@etc.sk>, 2003.
26 *
27 */
28
29#include <common.h>
30#include "intel.h"
31
32
33/*
34 * This code should handle CFI FLASH memory device. This code is very
35 * minimalistic approach without many essential error handling code as well.
36 * Because U-Boot actually is missing smart handling of FLASH device,
37 * we just set flash_id to anything else to FLASH_UNKNOW, so common code
38 * can call us without any restrictions.
39 * TODO: Add CFI Query, to be able to determine FLASH device.
40 * TODO: Add error handling code
41 * NOTE: This code was tested with BUS_WIDTH 4 and ITERLEAVE 2 only, but
42 *       hopefully may work with other configurations.
43 */
44
45#if ( SCB9328_FLASH_BUS_WIDTH == 1 )
46#  define FLASH_BUS vu_char
47#  define FLASH_BUS_RET u_char
48#  if ( SCB9328_FLASH_INTERLEAVE == 1 )
49#    define FLASH_CMD( x ) x
50#  else
51#    error "With 8bit bus only one chip is allowed"
52#  endif
53
54
55#elif ( SCB9328_FLASH_BUS_WIDTH == 2 )
56#  define FLASH_BUS vu_short
57#  define FLASH_BUS_RET u_short
58#  if ( SCB9328_FLASH_INTERLEAVE == 1 )
59#    define FLASH_CMD( x ) x
60#  elif ( SCB9328_FLASH_INTERLEAVE == 2 )
61#    define FLASH_CMD( x ) (( x << 8 )| x )
62#  else
63#    error "With 16bit bus only 1 or 2 chip(s) are allowed"
64#  endif
65
66
67#elif ( SCB9328_FLASH_BUS_WIDTH == 4 )
68#  define FLASH_BUS vu_long
69#  define FLASH_BUS_RET u_long
70#  if ( SCB9328_FLASH_INTERLEAVE == 1 )
71#    define FLASH_CMD( x ) x
72#  elif ( SCB9328_FLASH_INTERLEAVE == 2 )
73#    define FLASH_CMD( x ) (( x << 16 )| x )
74#  elif ( SCB9328_FLASH_INTERLEAVE == 4 )
75#    define FLASH_CMD( x ) (( x << 24 )|( x << 16 ) ( x << 8 )| x )
76#  else
77#    error "With 32bit bus only 1,2 or 4 chip(s) are allowed"
78#  endif
79
80#else
81#  error "Flash bus width might be 1,2,4 for 8,16,32 bit configuration"
82#endif
83
84
85flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
86
87static FLASH_BUS_RET flash_status_reg (void)
88{
89
90        FLASH_BUS *addr = (FLASH_BUS *) 0;
91
92        *addr = FLASH_CMD (CFI_INTEL_CMD_READ_STATUS_REGISTER);
93
94        return *addr;
95}
96
97static int flash_ready (ulong timeout)
98{
99        int ok = 1;
100
101        reset_timer_masked ();
102        while ((flash_status_reg () & FLASH_CMD (CFI_INTEL_SR_READY)) !=
103                   FLASH_CMD (CFI_INTEL_SR_READY)) {
104                if (get_timer_masked () > timeout && timeout != 0) {
105                        ok = 0;
106                        break;
107                }
108        }
109        return ok;
110}
111
112#if ( CFG_MAX_FLASH_BANKS != 1 )
113#  error "SCB9328 platform has only one flash bank!"
114#endif
115
116
117ulong flash_init (void)
118{
119        int i;
120        unsigned long address = SCB9328_FLASH_BASE;
121
122        flash_info[0].size = SCB9328_FLASH_BANK_SIZE;
123        flash_info[0].sector_count = CFG_MAX_FLASH_SECT;
124        flash_info[0].flash_id = INTEL_MANUFACT;
125        memset (flash_info[0].protect, 0, CFG_MAX_FLASH_SECT);
126
127        for (i = 0; i < CFG_MAX_FLASH_SECT; i++) {
128                flash_info[0].start[i] = address;
129#ifdef SCB9328_FLASH_UNLOCK
130                /* Some devices are hw locked after start. */
131                *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_LOCK_SETUP);
132                *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_UNLOCK_BLOCK);
133                flash_ready (0);
134                *((FLASH_BUS *) address) = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
135#endif
136                address += SCB9328_FLASH_SECT_SIZE;
137        }
138
139        flash_protect (FLAG_PROTECT_SET,
140                                   CFG_FLASH_BASE,
141                                   CFG_FLASH_BASE + monitor_flash_len - 1,
142                                   &flash_info[0]);
143
144        flash_protect (FLAG_PROTECT_SET,
145                                   CONFIG_ENV_ADDR,
146                                   CONFIG_ENV_ADDR + CONFIG_ENV_SIZE - 1, &flash_info[0]);
147
148        return SCB9328_FLASH_BANK_SIZE;
149}
150
151void flash_print_info (flash_info_t * info)
152{
153        int i;
154
155        printf (" Intel vendor\n");
156        printf ("  Size: %ld MB in %d Sectors\n",
157                        info->size >> 20, info->sector_count);
158
159        printf ("  Sector Start Addresses:");
160        for (i = 0; i < info->sector_count; i++) {
161                if (!(i % 5)) {
162                        printf ("\n");
163                }
164
165                printf (" %08lX%s", info->start[i],
166                                info->protect[i] ? " (RO)" : "     ");
167        }
168        printf ("\n");
169}
170
171
172int flash_erase (flash_info_t * info, int s_first, int s_last)
173{
174        int flag, non_protected = 0, sector;
175        int rc = ERR_OK;
176
177        FLASH_BUS *address;
178
179        for (sector = s_first; sector <= s_last; sector++) {
180                if (!info->protect[sector]) {
181                        non_protected++;
182                }
183        }
184
185        if (!non_protected) {
186                return ERR_PROTECTED;
187        }
188
189        /*
190         * Disable interrupts which might cause a timeout
191         * here. Remember that our exception vectors are
192         * at address 0 in the flash, and we don't want a
193         * (ticker) exception to happen while the flash
194         * chip is in programming mode.
195         */
196        flag = disable_interrupts ();
197
198
199        /* Start erase on unprotected sectors */
200        for (sector = s_first; sector <= s_last && !ctrlc (); sector++) {
201                if (info->protect[sector]) {
202                        printf ("Protected sector %2d skipping...\n", sector);
203                        continue;
204                } else {
205                        printf ("Erasing sector %2d ... ", sector);
206                }
207
208                address = (FLASH_BUS *) (info->start[sector]);
209
210                *address = FLASH_CMD (CFI_INTEL_CMD_BLOCK_ERASE);
211                *address = FLASH_CMD (CFI_INTEL_CMD_CONFIRM);
212                if (flash_ready (CFG_FLASH_ERASE_TOUT)) {
213                        *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
214                        printf ("ok.\n");
215                } else {
216                        *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
217                        rc = ERR_TIMOUT;
218                        printf ("timeout! Aborting...\n");
219                        break;
220                }
221                *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
222        }
223        if (ctrlc ())
224                printf ("User Interrupt!\n");
225
226        /* allow flash to settle - wait 10 ms */
227        udelay_masked (10000);
228        if (flag) {
229                enable_interrupts ();
230        }
231
232        return rc;
233}
234
235static int write_data (flash_info_t * info, ulong dest, FLASH_BUS data)
236{
237        FLASH_BUS *address = (FLASH_BUS *) dest;
238        int rc = ERR_OK;
239        int flag;
240
241        /* Check if Flash is (sufficiently) erased */
242        if ((*address & data) != data) {
243                return ERR_NOT_ERASED;
244        }
245
246        /*
247         * Disable interrupts which might cause a timeout
248         * here. Remember that our exception vectors are
249         * at address 0 in the flash, and we don't want a
250         * (ticker) exception to happen while the flash
251         * chip is in programming mode.
252         */
253
254        flag = disable_interrupts ();
255
256        *address = FLASH_CMD (CFI_INTEL_CMD_CLEAR_STATUS_REGISTER);
257        *address = FLASH_CMD (CFI_INTEL_CMD_PROGRAM1);
258        *address = data;
259
260        if (!flash_ready (CFG_FLASH_WRITE_TOUT)) {
261                *address = FLASH_CMD (CFI_INTEL_CMD_SUSPEND);
262                rc = ERR_TIMOUT;
263                printf ("timeout! Aborting...\n");
264        }
265
266        *address = FLASH_CMD (CFI_INTEL_CMD_READ_ARRAY);
267        if (flag) {
268                enable_interrupts ();
269        }
270
271        return rc;
272}
273
274int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
275{
276        ulong read_addr, write_addr;
277        FLASH_BUS data;
278        int i, result = ERR_OK;
279
280
281        read_addr = addr & ~(sizeof (FLASH_BUS) - 1);
282        write_addr = read_addr;
283        if (read_addr != addr) {
284                data = 0;
285                for (i = 0; i < sizeof (FLASH_BUS); i++) {
286                        if (read_addr < addr || cnt == 0) {
287                                data |= *((uchar *) read_addr) << i * 8;
288                        } else {
289                                data |= (*src++) << i * 8;
290                                cnt--;
291                        }
292                        read_addr++;
293                }
294                if ((result = write_data (info, write_addr, data)) != ERR_OK) {
295                        return result;
296                }
297                write_addr += sizeof (FLASH_BUS);
298        }
299        for (; cnt >= sizeof (FLASH_BUS); cnt -= sizeof (FLASH_BUS)) {
300                if ((result = write_data (info, write_addr,
301                                                                  *((FLASH_BUS *) src))) != ERR_OK) {
302                        return result;
303                }
304                write_addr += sizeof (FLASH_BUS);
305                src += sizeof (FLASH_BUS);
306        }
307        if (cnt > 0) {
308                read_addr = write_addr;
309                data = 0;
310                for (i = 0; i < sizeof (FLASH_BUS); i++) {
311                        if (cnt > 0) {
312                                data |= (*src++) << i * 8;
313                                cnt--;
314                        } else {
315                                data |= *((uchar *) read_addr) << i * 8;
316                        }
317                        read_addr++;
318                }
319                if ((result = write_data (info, write_addr, data)) != 0) {
320                        return result;
321                }
322        }
323        return ERR_OK;
324}
Note: See TracBrowser for help on using the repository browser.