/* * This file is part of the flashrom project. * * Copyright (C) 2007, 2008 Carl-Daniel Hailfinger * Copyright (C) 2008 Ronald Hoogenboom * Copyright (C) 2008 coresystems GmbH * * 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; version 2 of the License. * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* * Contains the ITE IT87* SPI specific routines */ #include #include #include #include #include "flash.h" #include "spi.h" #define ITE_SUPERIO_PORT1 0x2e #define ITE_SUPERIO_PORT2 0x4e uint16_t it8716f_flashport = 0; /* use fast 33MHz SPI (<>0) or slow 16MHz (0) */ int fast_spi = 1; /* Generic Super I/O helper functions */ uint8_t regval(uint16_t port, uint8_t reg) { OUTB(reg, port); return INB(port + 1); } void regwrite(uint16_t port, uint8_t reg, uint8_t val) { OUTB(reg, port); OUTB(val, port + 1); } /* Helper functions for most recent ITE IT87xx Super I/O chips */ #define CHIP_ID_BYTE1_REG 0x20 #define CHIP_ID_BYTE2_REG 0x21 static void enter_conf_mode_ite(uint16_t port) { OUTB(0x87, port); OUTB(0x01, port); OUTB(0x55, port); if (port == ITE_SUPERIO_PORT1) OUTB(0x55, port); else OUTB(0xaa, port); } static void exit_conf_mode_ite(uint16_t port) { regwrite(port, 0x02, 0x02); } static uint16_t find_ite_spi_flash_port(uint16_t port) { uint8_t tmp = 0; uint16_t id, flashport = 0; enter_conf_mode_ite(port); id = regval(port, CHIP_ID_BYTE1_REG) << 8; id |= regval(port, CHIP_ID_BYTE2_REG); /* TODO: Handle more IT87xx if they support flash translation */ if (0x8716 == id || 0x8718 == id) { /* NOLDN, reg 0x24, mask out lowest bit (suspend) */ tmp = regval(port, 0x24) & 0xFE; printf("Serial flash segment 0x%08x-0x%08x %sabled\n", 0xFFFE0000, 0xFFFFFFFF, (tmp & 1 << 1) ? "en" : "dis"); printf("Serial flash segment 0x%08x-0x%08x %sabled\n", 0x000E0000, 0x000FFFFF, (tmp & 1 << 1) ? "en" : "dis"); printf("Serial flash segment 0x%08x-0x%08x %sabled\n", 0xFFEE0000, 0xFFEFFFFF, (tmp & 1 << 2) ? "en" : "dis"); printf("Serial flash segment 0x%08x-0x%08x %sabled\n", 0xFFF80000, 0xFFFEFFFF, (tmp & 1 << 3) ? "en" : "dis"); printf("LPC write to serial flash %sabled\n", (tmp & 1 << 4) ? "en" : "dis"); /* If any serial flash segment is enabled, enable writing. */ if ((tmp & 0xe) && (!(tmp & 1 << 4))) { printf("Enabling LPC write to serial flash\n"); tmp |= 1 << 4; regwrite(port, 0x24, tmp); } printf("serial flash pin %i\n", (tmp & 1 << 5) ? 87 : 29); /* LDN 0x7, reg 0x64/0x65 */ regwrite(port, 0x07, 0x7); flashport = regval(port, 0x64) << 8; flashport |= regval(port, 0x65); } exit_conf_mode_ite(port); return flashport; } int it87xx_probe_spi_flash(const char *name) { it8716f_flashport = find_ite_spi_flash_port(ITE_SUPERIO_PORT1); if (!it8716f_flashport) it8716f_flashport = find_ite_spi_flash_port(ITE_SUPERIO_PORT2); if (it8716f_flashport) flashbus = BUS_TYPE_IT87XX_SPI; return (!it8716f_flashport); } /* * The IT8716F only supports commands with length 1,2,4,5 bytes including * command byte and can not read more than 3 bytes from the device. * * This function expects writearr[0] to be the first byte sent to the device, * whereas the IT8716F splits commands internally into address and non-address * commands with the address in inverse wire order. That's why the register * ordering in case 4 and 5 may seem strange. */ int it8716f_spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr) { uint8_t busy, writeenc; int i; do { busy = INB(it8716f_flashport) & 0x80; } while (busy); if (readcnt > 3) { printf("%s called with unsupported readcnt %i.\n", __FUNCTION__, readcnt); return 1; } switch (writecnt) { case 1: OUTB(writearr[0], it8716f_flashport + 1); writeenc = 0x0; break; case 2: OUTB(writearr[0], it8716f_flashport + 1); OUTB(writearr[1], it8716f_flashport + 7); writeenc = 0x1; break; case 4: OUTB(writearr[0], it8716f_flashport + 1); OUTB(writearr[1], it8716f_flashport + 4); OUTB(writearr[2], it8716f_flashport + 3); OUTB(writearr[3], it8716f_flashport + 2); writeenc = 0x2; break; case 5: OUTB(writearr[0], it8716f_flashport + 1); OUTB(writearr[1], it8716f_flashport + 4); OUTB(writearr[2], it8716f_flashport + 3); OUTB(writearr[3], it8716f_flashport + 2); OUTB(writearr[4], it8716f_flashport + 7); writeenc = 0x3; break; default: printf("%s called with unsupported writecnt %i.\n", __FUNCTION__, writecnt); return 1; } /* * Start IO, 33 or 16 MHz, readcnt input bytes, writecnt output bytes. * Note: * We can't use writecnt directly, but have to use a strange encoding. */ OUTB(((0x4 + (fast_spi ? 1 : 0)) << 4) | ((readcnt & 0x3) << 2) | (writeenc), it8716f_flashport); if (readcnt > 0) { do { busy = INB(it8716f_flashport) & 0x80; } while (busy); for (i = 0; i < readcnt; i++) readarr[i] = INB(it8716f_flashport + 5 + i); } return 0; } /* Page size is usually 256 bytes */ static void it8716f_spi_page_program(int block, uint8_t *buf, uint8_t *bios) { int i; spi_write_enable(); OUTB(0x06, it8716f_flashport + 1); OUTB(((2 + (fast_spi ? 1 : 0)) << 4), it8716f_flashport); for (i = 0; i < 256; i++) { bios[256 * block + i] = buf[256 * block + i]; } OUTB(0, it8716f_flashport); /* Wait until the Write-In-Progress bit is cleared. * This usually takes 1-10 ms, so wait in 1 ms steps. */ while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) usleep(1000); } /* * IT8716F only allows maximum of 512 kb SPI mapped to LPC memory cycles * Program chip using firmware cycle byte programming. (SLOW!) */ int it8716f_over512k_spi_chip_write(struct flashchip *flash, uint8_t *buf) { int total_size = 1024 * flash->total_size; int i; fast_spi = 0; spi_disable_blockprotect(); for (i = 0; i < total_size; i++) { spi_write_enable(); spi_byte_program(i, buf[i]); while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) myusec_delay(10); } /* resume normal ops... */ OUTB(0x20, it8716f_flashport); return 0; } /* * IT8716F only allows maximum of 512 kb SPI mapped to LPC memory cycles * Need to read this big flash using firmware cycles 3 byte at a time. */ int it8716f_spi_chip_read(struct flashchip *flash, uint8_t *buf) { int total_size = 1024 * flash->total_size; int i; fast_spi = 0; if (total_size > 512 * 1024) { for (i = 0; i < total_size; i += 3) { int toread = 3; if (total_size - i < toread) toread = total_size - i; spi_nbyte_read(i, buf + i, toread); } } else { memcpy(buf, (const char *)flash->virtual_memory, total_size); } return 0; } int it8716f_spi_chip_write(struct flashchip *flash, uint8_t *buf) { int total_size = 1024 * flash->total_size; int i; if (total_size > 512 * 1024) { it8716f_over512k_spi_chip_write(flash, buf); } else { for (i = 0; i < total_size / 256; i++) { it8716f_spi_page_program(i, buf, (uint8_t *)flash->virtual_memory); } } return 0; }