/* * This file is part of the flashrom project. * * Copyright (C) 2000 Silicon Integrated System Corporation * * 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. */ /* * Datasheet: * - Name: Intel 82802AB/82802AC Firmware Hub (FWH) * - URL: http://www.intel.com/design/chipsets/datashts/290658.htm * - PDF: http://download.intel.com/design/chipsets/datashts/29065804.pdf * - Order number: 290658-004 */ #include #include "flash.h" #include "chipdrivers.h" void print_status_82802ab(uint8_t status) { msg_cdbg("%s", status & 0x80 ? "Ready:" : "Busy:"); msg_cdbg("%s", status & 0x40 ? "BE SUSPEND:" : "BE RUN/FINISH:"); msg_cdbg("%s", status & 0x20 ? "BE ERROR:" : "BE OK:"); msg_cdbg("%s", status & 0x10 ? "PROG ERR:" : "PROG OK:"); msg_cdbg("%s", status & 0x8 ? "VP ERR:" : "VPP OK:"); msg_cdbg("%s", status & 0x4 ? "PROG SUSPEND:" : "PROG RUN/FINISH:"); msg_cdbg("%s", status & 0x2 ? "WP|TBL#|WP#,ABORT:" : "UNLOCK:"); } int probe_82802ab(struct flashctx *flash) { chipaddr bios = flash->virtual_memory; uint8_t id1, id2, flashcontent1, flashcontent2; int shifted = (flash->chip->feature_bits & FEATURE_ADDR_SHIFTED) ? 1 : 0; /* Reset to get a clean state */ chip_writeb(flash, 0xFF, bios); programmer_delay(flash, 10); /* Enter ID mode */ chip_writeb(flash, 0x90, bios); programmer_delay(flash, 10); id1 = chip_readb(flash, bios + (0x00 << shifted)); id2 = chip_readb(flash, bios + (0x01 << shifted)); /* Leave ID mode */ chip_writeb(flash, 0xFF, bios); programmer_delay(flash, 10); msg_cdbg("%s: id1 0x%02x, id2 0x%02x", __func__, id1, id2); if (!oddparity(id1)) msg_cdbg(", id1 parity violation"); /* * Read the product ID location again. We should now see normal * flash contents. */ flashcontent1 = chip_readb(flash, bios + (0x00 << shifted)); flashcontent2 = chip_readb(flash, bios + (0x01 << shifted)); if (id1 == flashcontent1) msg_cdbg(", id1 is normal flash content"); if (id2 == flashcontent2) msg_cdbg(", id2 is normal flash content"); msg_cdbg("\n"); if (id1 != flash->chip->manufacture_id || id2 != flash->chip->model_id) return 0; return 1; } /* FIXME: needs timeout */ uint8_t wait_82802ab(struct flashctx *flash) { uint8_t status; chipaddr bios = flash->virtual_memory; chip_writeb(flash, 0x70, bios); while ((chip_readb(flash, bios) & 0x80) == 0) // it's busy ; status = chip_readb(flash, bios); /* Reset to get a clean state */ chip_writeb(flash, 0xFF, bios); return status; } int erase_block_82802ab(struct flashctx *flash, unsigned int page, unsigned int pagesize) { chipaddr bios = flash->virtual_memory; uint8_t status; // clear status register chip_writeb(flash, 0x50, bios + page); // now start it chip_writeb(flash, 0x20, bios + page); chip_writeb(flash, 0xd0, bios + page); programmer_delay(flash, 10); // now let's see what the register is status = wait_82802ab(flash); print_status_82802ab(status); /* FIXME: Check the status register for errors. */ return 0; } /* chunksize is 1 */ int write_82802ab(struct flashctx *flash, const uint8_t *src, unsigned int start, unsigned int len) { unsigned int i; chipaddr dst = flash->virtual_memory + start; for (i = 0; i < len; i++) { /* transfer data from source to destination */ chip_writeb(flash, 0x40, dst); chip_writeb(flash, *src++, dst++); wait_82802ab(flash); update_progress(flash, FLASHROM_PROGRESS_WRITE, i + 1, len); } /* FIXME: Ignore errors for now. */ return 0; } static int unlock_28f004s5(struct flashctx *flash) { chipaddr bios = flash->virtual_memory; uint8_t mcfg, bcfg; bool need_unlock = false, can_unlock = false; unsigned int i; /* Clear status register */ chip_writeb(flash, 0x50, bios); /* Read identifier codes */ chip_writeb(flash, 0x90, bios); /* Read master lock-bit */ mcfg = chip_readb(flash, bios + 0x3); msg_cdbg("master lock is "); if (mcfg) { msg_cdbg("locked!\n"); } else { msg_cdbg("unlocked!\n"); can_unlock = true; } /* Read block lock-bits */ for (i = 0; i < flash->chip->total_size * 1024; i+= (64 * 1024)) { bcfg = chip_readb(flash, bios + i + 2); // read block lock config msg_cdbg("block lock at %06x is %slocked!\n", i, bcfg ? "" : "un"); if (bcfg) { need_unlock = true; } } /* Reset chip */ chip_writeb(flash, 0xFF, bios); /* Unlock: clear block lock-bits, if needed */ if (can_unlock && need_unlock) { msg_cdbg("Unlock: "); chip_writeb(flash, 0x60, bios); chip_writeb(flash, 0xD0, bios); chip_writeb(flash, 0xFF, bios); msg_cdbg("Done!\n"); } /* Error: master locked or a block is locked */ if (!can_unlock && need_unlock) { msg_cerr("At least one block is locked and lockdown is active!\n"); return -1; } return 0; } static int unlock_lh28f008bjt(struct flashctx *flash) { chipaddr bios = flash->virtual_memory; uint8_t mcfg, bcfg; bool need_unlock = false, can_unlock = false; unsigned int i; /* Wait if chip is busy */ wait_82802ab(flash); /* Read identifier codes */ chip_writeb(flash, 0x90, bios); /* Read master lock-bit */ mcfg = chip_readb(flash, bios + 0x3); msg_cdbg("master lock is "); if (mcfg) { msg_cdbg("locked!\n"); } else { msg_cdbg("unlocked!\n"); can_unlock = true; } /* Read block lock-bits, 8 * 8 KB + 15 * 64 KB */ for (i = 0; i < flash->chip->total_size * 1024; i += (i >= (64 * 1024) ? 64 * 1024 : 8 * 1024)) { bcfg = chip_readb(flash, bios + i + 2); /* read block lock config */ msg_cdbg("block lock at %06x is %slocked!\n", i, bcfg ? "" : "un"); if (bcfg) need_unlock = true; } /* Reset chip */ chip_writeb(flash, 0xFF, bios); /* Unlock: clear block lock-bits, if needed */ if (can_unlock && need_unlock) { msg_cdbg("Unlock: "); chip_writeb(flash, 0x60, bios); chip_writeb(flash, 0xD0, bios); chip_writeb(flash, 0xFF, bios); wait_82802ab(flash); msg_cdbg("Done!\n"); } /* Error: master locked or a block is locked */ if (!can_unlock && need_unlock) { msg_cerr("At least one block is 
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