diff options
Diffstat (limited to 'util/flashrom/wbsio_spi.c')
| -rw-r--r-- | util/flashrom/wbsio_spi.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/util/flashrom/wbsio_spi.c b/util/flashrom/wbsio_spi.c new file mode 100644 index 0000000000..5ad945549d --- /dev/null +++ b/util/flashrom/wbsio_spi.c @@ -0,0 +1,201 @@ +/* + * This file is part of the flashrom project. + * + * Copyright (C) 2008 Peter Stuge <peter@stuge.se> + * + * 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 + */ + +#include <stdio.h> +#include <pci/pci.h> +#include <stdint.h> +#include <string.h> +#include "flash.h" +#include "spi.h" + +#define WBSIO_PORT1 0x2e +#define WBSIO_PORT2 0x4e + +static uint16_t wbsio_spibase = 0; + +static uint16_t wbsio_get_spibase(uint16_t port) { + uint8_t id; + uint16_t flashport = 0; + + w836xx_ext_enter(port); + id = wbsio_read(port, 0x20); + if(id != 0xa0) { + fprintf(stderr, "\nW83627 not found at 0x%x, id=0x%02x want=0xa0.\n", port, id); + goto done; + } + + if (0 == (wbsio_read(port, 0x24) & 2)) { + fprintf(stderr, "\nW83627 found at 0x%x, but SPI pins are not enabled. (CR[0x24] bit 1=0)\n", port); + goto done; + } + + wbsio_write(port, 0x07, 0x06); + if (0 == (wbsio_read(port, 0x30) & 1)) { + fprintf(stderr, "\nW83627 found at 0x%x, but SPI is not enabled. (LDN6[0x30] bit 0=0)\n", port); + goto done; + } + + flashport = (wbsio_read(port, 0x62) << 8) | wbsio_read(port, 0x63); + +done: + w836xx_ext_leave(port); + return flashport; +} + +int wbsio_check_for_spi(const char *name) { + if (0 == (wbsio_spibase = wbsio_get_spibase(WBSIO_PORT1))) + if (0 == (wbsio_spibase = wbsio_get_spibase(WBSIO_PORT2))) + return 1; + + printf_debug("\nwbsio_spibase = 0x%x\n", wbsio_spibase); + flashbus = BUS_TYPE_WBSIO_SPI; + return 0; +} + +/* W83627DHG has 11 command modes: + * 1=1 command only + * 2=1 command+1 data write + * 3=1 command+2 data read + * 4=1 command+3 address + * 5=1 command+3 address+1 data write + * 6=1 command+3 address+4 data write + * 7=1 command+3 address+1 dummy address inserted by wbsio+4 data read + * 8=1 command+3 address+1 data read + * 9=1 command+3 address+2 data read + * a=1 command+3 address+3 data read + * b=1 command+3 address+4 data read + * + * mode[7:4] holds the command mode + * mode[3:0] holds SPI address bits [19:16] + * + * The Winbond SPI master only supports 20 bit addresses on the SPI bus. :\ + * Would one more byte of RAM in the chip (to get all 24 bits) really make + * such a big difference? + */ +int wbsio_spi_command(unsigned int writecnt, unsigned int readcnt, const unsigned char *writearr, unsigned char *readarr) { + int i; + uint8_t mode = 0; + + printf_debug("%s:", __func__); + + if (1 == writecnt && 0 == readcnt) { + mode = 0x10; + } else if (2 == writecnt && 0 == readcnt) { + OUTB(writearr[1], wbsio_spibase + 4); + printf_debug(" data=0x%02x", writearr[1]); + mode = 0x20; + } else if (1 == writecnt && 2 == readcnt) { + mode = 0x30; + } else if (4 == writecnt && 0 == readcnt) { + printf_debug(" addr=0x%02x", (writearr[1] & 0x0f)); + for (i = 2; i < writecnt; i++) { + OUTB(writearr[i], wbsio_spibase + i); + printf_debug("%02x", writearr[i]); + } + mode = 0x40 | (writearr[1] & 0x0f); + } else if (5 == writecnt && 0 == readcnt) { + printf_debug(" addr=0x%02x", (writearr[1] & 0x0f)); + for (i = 2; i < 4; i++) { + OUTB(writearr[i], wbsio_spibase + i); + printf_debug("%02x", writearr[i]); + } + OUTB(writearr[i], wbsio_spibase + i); + printf_debug(" data=0x%02x", writearr[i]); + mode = 0x50 | (writearr[1] & 0x0f); + } else if (8 == writecnt && 0 == readcnt) { + printf_debug(" addr=0x%02x", (writearr[1] & 0x0f)); + for (i = 2; i < 4; i++) { + OUTB(writearr[i], wbsio_spibase + i); + printf_debug("%02x", writearr[i]); + } + printf_debug(" data=0x"); + for (; i < writecnt; i++) { + OUTB(writearr[i], wbsio_spibase + i); + printf_debug("%02x", writearr[i]); + } + mode = 0x60 | (writearr[1] & 0x0f); + } else if (5 == writecnt && 4 == readcnt) { + /* XXX: TODO not supported by flashrom infrastructure! + * This mode, 7, discards the fifth byte in writecnt, + * but since we can not express that in flashrom, fail + * the operation for now. + */ + ; + } else if (4 == writecnt && readcnt >= 1 && readcnt <= 4) { + printf_debug(" addr=0x%02x", (writearr[1] & 0x0f)); + for (i = 2; i < writecnt; i++) { + OUTB(writearr[i], wbsio_spibase + i); + printf_debug("%02x", writearr[i]); + } + mode = ((7 + readcnt) << 4) | (writearr[1] & 0x0f); + } + printf_debug(" cmd=%02x mode=%02x\n", writearr[0], mode); + + if (!mode) { + fprintf(stderr, "%s: unsupported command type wr=%d rd=%d\n", + __func__, writecnt, readcnt); + return 1; + } + + OUTB(writearr[0], wbsio_spibase); + OUTB(mode, wbsio_spibase + 1); + myusec_delay(10); + + if (!readcnt) + return 0; + + printf_debug("%s: returning data =", __func__); + for (i = 0; i < readcnt; i++) { + readarr[i] = INB(wbsio_spibase + 4 + i); + printf_debug(" 0x%02x", readarr[i]); + } + printf_debug("\n"); + return 0; +} + +int wbsio_spi_read(struct flashchip *flash, uint8_t *buf) { + int size = flash->total_size * 1024; + + if (flash->total_size > 1024) { + fprintf(stderr, "%s: Winbond saved on 4 register bits so max chip size is 1024 KB!\n", __func__); + return 1; + } + + memcpy(buf, (const char *)flash->virtual_memory, size); + return 0; +} + +int wbsio_spi_write(struct flashchip *flash, uint8_t *buf) { + int pos, size = flash->total_size * 1024; + + if (flash->total_size > 1024) { + fprintf(stderr, "%s: Winbond saved on 4 register bits so max chip size is 1024 KB!\n", __func__); + return 1; + } + + flash->erase(flash); + spi_write_enable(); + for (pos = 0; pos < size; pos++) { + spi_byte_program(pos, buf[pos]); + while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP) + myusec_delay(10); + } + spi_write_disable(); + return 0; +} |