/* * $Id$ * * Flash driver for AMD Am29LV640D, Am29LV641D, Am29LV642D * Copyright (C) 2003 AH * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA * 02111-1307, USA. * * Written by August Hörandl * * Documentation: * [1] Advanced Micro Devices, "Am29LV640D/Am29LV641D", * September 20, 2002 Rev B, 22366b8.pdf * [2] Advanced Micro Devices, "Am29LV642D", * August 14, 2001 Rev A, 25022.pdf * */ #include #include #include #include #include #include #include "flash.h" static int dbg = 0; static int amd_flash_erase_block( parts *ps, uint32_t adr ); static int amd_flash_unlock_block( parts *ps, uint32_t adr ); static int amd_flash_program( parts *ps, uint32_t adr, uint32_t data ); static void amd_flash_read_array( parts *ps); /* autodetect, we can handle this chip */ static int amd_flash_autodetect( parts *ps, cfi_query_structure_t *cfi ) { return (cfi->identification_string.pri_id_code == CFI_VENDOR_AMD_SCS); } /* * check device status * 1/true PASS * 0/false FAIL */ /* * first implementation: see [1], page 29 */ static int amdstatus29( parts *ps, uint32_t adr, uint32_t data ) { int o = 2; int timeout; uint32_t dq7mask = ((1 << 7) << 16) + (1 << 7); uint32_t dq5mask = ((1 << 5) << 16) + (1 << 5); uint32_t bit7 = (data & (1 << 7)) != 0; uint32_t data1; for (timeout = 0; timeout < 100; timeout++) { data1 = bus_read( ps, adr << o ); data1 = bus_read( ps, adr << o ); if (dbg) printf( "amdstatus %d: %04X (%04X) = %04X\n", timeout, data1, (data1 & dq7mask), bit7 ); if (((data1 & dq7mask) == dq7mask) == bit7) /* FIXME: This looks non-portable */ return 1; if ((data1 & dq5mask) == dq5mask) break; usleep( 100 ); } data1 = bus_read( ps, adr << o ); if (((data1 & dq7mask) == dq7mask) == bit7) /* FIXME: This looks non-portable */ return 1; return 0; } /* * second implementation: see [1], page 30 */ static int amdstatus( parts *ps, uint32_t adr, int data ) { int timeout; uint32_t togglemask = ((1 << 6) << 16) + (1 << 6); /* DQ 6 */ /* int dq5mask = ((1 << 5) << 16) + (1 << 5); DQ5 */ for (timeout = 0; timeout < 100; timeout++) { uint32_t data1 = bus_read( ps, adr ); uint32_t data2 = bus_read( ps, adr ); /*printf("amdstatus %d: %04X/%04X %04X/%04X \n", */ /* timeout, data1, data2, (data1 & togglemask), (data2 & togglemask)); */ if ( (data1 & togglemask) == (data2 & togglemask)) /* no toggle */ return 1; /* if ( (data1 & dq5mask) != 0 ) TODO */ /* return 0; */ if (dbg) printf( "amdstatus %d: %04X/%04X\n", timeout, data1, data2 ); else printf( "." ); usleep( 100 ); } return 0; } static int amdisprotected( parts *ps, uint32_t adr ) { uint32_t data; int o = 2; bus_write( ps, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, sector erase */ bus_write( ps, 0x02aa << o, 0x00550055 ); bus_write( ps, 0x0555 << o, 0x00900090 ); data = bus_read( ps, adr + (0x0002 << 2) ); /* Read Array */ amd_flash_read_array( ps ); /* AMD reset */ return ((data & 0x00ff00ff) != 0); } static void amd_flash_print_info( parts *ps ) { int o = 2; int mid, cid, prot; bus_write( ps, 0x0555 << o, 0x00aa00aa ); /* autoselect p29 */ bus_write( ps, 0x02aa << o, 0x00550055 ); bus_write( ps, 0x0555 << o, 0x00900090 ); mid = bus_read( ps, 0x00 << o ) & 0xFFFF; cid = bus_read( ps, 0x01 << o ) & 0xFFFF; prot = bus_read( ps, 0x02 << o ) & 0xFF; amd_flash_read_array(ps); /* AMD reset */ printf( "Chip: AMD Flash\n\tManufacturer: " ); switch (mid) { case 0x0001: printf( "AMD" ); break; default: printf( "Unknown manufacturer (ID 0x%04x)", mid ); break; } printf( "\n\tChip: " ); switch (cid) { case 0x22D7: printf( "Am29LV640D/Am29LV641D/Am29LV642D" ); break; default: printf ( "Unknown (ID 0x%04x)", cid ); break; } printf( "\n\tProtected: %04x\n", prot ); } static int amd_flash_erase_block( parts *ps, uint32_t adr ) { int o = 2; printf("flash_erase_block 0x%08X\n", adr); /* printf("protected: %d\n", amdisprotected(ps, adr)); */ bus_write( ps, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, sector erase */ bus_write( ps, 0x02aa << o, 0x00550055 ); bus_write( ps, 0x0555 << o, 0x00800080 ); bus_write( ps, 0x0555 << o, 0x00aa00aa ); bus_write( ps, 0x02aa << o, 0x00550055 ); bus_write( ps, adr, 0x00300030 ); if (amdstatus(ps, adr, 0xffff)) { printf( "flash_erase_block 0x%08X DONE\n", adr ); amd_flash_read_array( ps ); /* AMD reset */ return 0; } printf( "flash_erase_block 0x%08X FAILED\n", adr ); /* Read Array */ amd_flash_read_array( ps ); /* AMD reset */ return CFI_INTEL_ERROR_UNKNOWN; } static int amd_flash_unlock_block( parts *ps, uint32_t adr ) { printf( "flash_unlock_block 0x%08X IGNORE\n", adr ); return 0; } static int amd_flash_program( parts *ps, uint32_t adr, uint32_t data ) { int o = 2; int status; if (dbg) printf("\nflash_program 0x%08X = 0x%08X\n", adr, data); bus_write( ps, 0x0555 << o, 0x00aa00aa ); /* autoselect p29, program */ bus_write( ps, 0x02aa << o, 0x00550055 ); bus_write( ps, 0x0555 << o, 0x00A000A0 ); bus_write( ps, adr, data ); status = amdstatus( ps, adr, data ); /* amd_flash_read_array(ps); */ return !status; } static void amd_flash_read_array( parts *ps) { /* Read Array */ bus_write( ps, 0x0, 0x00F000F0 ); /* AMD reset */ } flash_driver_t amd_32_flash_driver = { 4, /* buswidth */ "AMD/Fujitsu Standard Command Set", "supported: AMD 29LV640D, 29LV641D, 29LV642D; 2x16 Bit", amd_flash_autodetect, amd_flash_print_info, amd_flash_erase_block, amd_flash_unlock_block, amd_flash_program, amd_flash_read_array, };