Author: mhm Date: Mon Sep 13 21:39:25 2010 New Revision: 1161 URL: http://flashrom.org/trac/flashrom/changeset/1161
Log: Add board enable for ASUS P4SC-E.
I does this by setting bits 3..2 of register 0x24 on the ITE IT8707F, while keeping bit 3 of register 0x23 set while manipulating the first register.
AFAIK, there is no public datasheet available for this super i/o chip, but the above is how the vendor BIOS does it. Also, registers 0x23 and 0x24 seem to have the same meaning as on the ITE IT8710F.
Matching on NB/SB.
Tested on a P4SC-E with SST 39SF020A flash. Probe, read, erase, write all work.
lspci/superio output: http://www.flashrom.org/pipermail/flashrom/2010-July/004090.html
flashrom output: http://www.flashrom.org/pipermail/flashrom/2010-August/004566.html
Many thanks to Reinder de Haan for help with reverse engineering this!
Signed-off-by: Mattias Mattsson vitplister@gmail.com Acked-by: Uwe Hermann uwe@hermann-uwe.de
Modified: trunk/board_enable.c trunk/print.c
Modified: trunk/board_enable.c ============================================================================== --- trunk/board_enable.c Mon Sep 13 20:22:36 2010 (r1160) +++ trunk/board_enable.c Mon Sep 13 21:39:25 2010 (r1161) @@ -498,6 +498,48 @@ return ret; }
+/* + * The ITE IT8707F is a custom chip made by ITE exclusively for ASUS. + * It uses the Winbond command sequence to enter extended configuration + * mode and the ITE sequence to exit. + * + * Registers seems similar to the ones on ITE IT8710F. + */ +static int it8707f_write_enable(uint8_t port) +{ + uint8_t tmp; + + w836xx_ext_enter(port); + + /* Set bit 3 (GLB_REG_WE) of reg 0x23: Makes reg 0x24-0x2A rw */ + tmp = sio_read(port, 0x23); + tmp |= (1 << 3); + sio_write(port, 0x23, tmp); + + /* Set bit 2 (FLASH_WE) and bit 3 (FLASH_IF_EN) of reg 0x24 */ + tmp = sio_read(port, 0x24); + tmp |= (1 << 2) | (1 << 3); + sio_write(port, 0x24, tmp); + + /* Clear bit 3 (GLB_REG_WE) of reg 0x23: Makes reg 0x24-0x2A ro */ + tmp = sio_read(port, 0x23); + tmp &= ~(1 << 3); + sio_write(port, 0x23, tmp); + + exit_conf_mode_ite(port); + + return 0; +} + +/* + * Suited for: + * - ASUS P4SC-E: SiS 651 + 962 + ITE IT8707F + */ +static int it8707f_write_enable_2e(void) +{ + return it8707f_write_enable(0x2e); +} + static int pc87360_gpio_set(uint8_t gpio, int raise) { static const int bankbase[] = {0, 4, 8, 10, 12}; @@ -1818,6 +1860,7 @@ {0x8086, 0x24D3, 0x1043, 0x80A6, 0x8086, 0x2578, 0x1043, 0x80F6, NULL, NULL, NULL, "ASUS", "P4C800-E Deluxe", 0, OK, intel_ich_gpio21_raise}, {0x8086, 0x2570, 0x1043, 0x80F2, 0x8086, 0x24D5, 0x1043, 0x80F3, NULL, NULL, NULL, "ASUS", "P4P800", 0, NT, intel_ich_gpio21_raise}, {0x8086, 0x2570, 0x1043, 0x80F2, 0x105A, 0x3373, 0x1043, 0x80F5, NULL, NULL, NULL, "ASUS", "P4P800-E Deluxe", 0, OK, intel_ich_gpio21_raise}, + {0x1039, 0x0651, 0x1043, 0x8081, 0x1039, 0x0962, 0, 0, NULL, NULL, NULL, "ASUS", "P4SC-E", 0, OK, it8707f_write_enable_2e}, {0x8086, 0x2570, 0x1043, 0x80A5, 0x105A, 0x24D3, 0x1043, 0x80A6, NULL, NULL, NULL, "ASUS", "P4SD-LA", 0, NT, intel_ich_gpio32_raise}, {0x1039, 0x0661, 0x1043, 0x8113, 0x1039, 0x5513, 0x1043, 0x8087, NULL, NULL, NULL, "ASUS", "P4S800-MX", 512, OK, w836xx_memw_enable_2e}, {0x10B9, 0x1541, 0, 0, 0x10B9, 0x1533, 0, 0, "^P5A$", "asus", "p5a", "ASUS", "P5A", 0, OK, board_asus_p5a},
Modified: trunk/print.c ============================================================================== --- trunk/print.c Mon Sep 13 20:22:36 2010 (r1160) +++ trunk/print.c Mon Sep 13 21:39:25 2010 (r1161) @@ -363,6 +363,7 @@ B("ASUS", "P4C800-E Deluxe", 1, "http://www.asus.com/product.aspx?P_ID=cFuVCr9bXXCckmcK", NULL), B("ASUS", "P4P800", 1, "http://www.asus.com/product.aspx?P_ID=DYt1Et9MlBChqzLb", NULL), B("ASUS", "P4P800-E Deluxe", 1, "http://www.asus.com/product.aspx?P_ID=INIJUvLlif7LHp3g", NULL), + B("ASUS", "P4SC-E", 1, "ftp://ftp.asus.com.tw/pub/ASUS/mb/sock478/p4sc-e/", "Part of ASUS Terminator P4 533 barebone system"), B("ASUS", "P4SD-LA", 1, "http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00022505", NULL), B("ASUS", "P4S800-MX", 1, "http://www.asus.com/product.aspx?P_ID=Bb57zoJhmO1Qkcrh", NULL), B("ASUS", "P5A", 1, "ftp://ftp.asus.com.tw/pub/ASUS/mb/sock7/ali/p5a/", NULL),