1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 /***************************************************************************
4 * Copyright (C) 2007 by Pavel Chromy *
6 ***************************************************************************/
9 #include <flash/nor/ocl.h>
14 #define BUFSIZE 1024 /* words, i.e. 4 KiB */
17 void cmd_flash(uint32 cmd)
22 unsigned int bi; /* buffer index */
23 unsigned int bi_start; /* receive start mark */
24 unsigned int bi_end; /* receive end mark */
31 ofs = adr%flash_page_size;
33 bi_end = (ofs + len + 3)/4;
35 if (bi_end > BUFSIZE) {
36 dcc_wr(OCL_BUFF_OVER);
40 chksum = OCL_CHKS_INIT;
41 for (bi = 0; bi < bi_end; bi++) chksum^=buffer[bi]=dcc_rd();
43 if (dcc_rd() != chksum) {
44 dcc_wr(OCL_CHKS_FAIL);
48 /* fill in unused positions with unprogrammed values */
49 for (bi = 0; bi < bi_start; bi++) buffer[bi]=0xffffffff;
50 for (bi = bi_end; bi%flash_page_size; bi++) buffer[bi]=0xffffffff;
53 pagenum = adr/flash_page_size;
54 for (bi = 0; bi < bi_end; bi += flash_page_size/4) {
55 result = flash_page_program(buffer + bi, pagenum++);
59 /* verify written data */
60 if (!result) result = flash_verify(adr, len, ((uint8 *)buffer) + ofs);
62 dcc_wr(OCL_CMD_DONE | result);
72 switch (cmd&OCL_CMD_MASK) {
74 dcc_wr(OCL_CMD_DONE | flash_init());
75 dcc_wr(0x100000); /* base */
76 dcc_wr(flash_page_count*flash_page_size); /* size */
77 dcc_wr(1); /* num_sectors */
78 dcc_wr(4096 | ((unsigned long) flash_page_size << 16)); /* buflen and bufalign */
81 dcc_wr(OCL_CMD_DONE | flash_erase_all());
93 return 0; /* we shall never get here, just to suppress compiler warning */