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This patch aims to restructure SPI flash support in a more reasonable

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way. It introduces a generic SPI host driver for the IT8716F Super I/O
which will enable easy SPI programming without having to care for the
peculiarities of the SPI host.

To activate probing for the IT8716F, you have to use the gigabyte:m57sli
mainboard override. SPI support will then use the gathered SPI host data
to access the SPI flash.

This has been tested sucessfully by Ward Vandewege <ward@gnu.org> on the
GA-M57SLI v2.0, which has a MX25L4005 SPI flash part.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Ward Vandewege <ward@gnu.org>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2817 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Carl-Daniel Hailfinger
2007-10-02 15:49:25 +00:00
committed by Ward Vandewege
parent 3617103cc7
commit 0de6f0a36f
3 changed files with 119 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
util/flashrom/board_enable.c
View File

@ -30,6 +30,15 @@
#include <string.h>
#include "flash.h"
#define ITE_SUPERIO_PORT1 0x2e
#define ITE_SUPERIO_PORT2 0x4e
#define JEDEC_RDID {0x9f}
#define JEDEC_RDID_OUTSIZE 0x01
#define JEDEC_RDID_INSIZE 0x03
static uint16_t it8716f_flashport = 0;
/* Generic Super I/O helper functions */
uint8_t regval(uint16_t port, uint8_t reg)
{
@ -51,7 +60,7 @@ static void enter_conf_mode_ite(uint16_t port)
outb(0x87, port);
outb(0x01, port);
outb(0x55, port);
if (port == 0x2e)
if (port == ITE_SUPERIO_PORT1)
outb(0x55, port);
else
outb(0xaa, port);
@ -96,35 +105,97 @@ static uint16_t find_ite_serial_flash_port(uint16_t port)
return flashport;
}
static void it8716_serial_rdid(uint16_t port)
/* 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. */
static int it8716f_spi_command(uint16_t port, unsigned char writecnt, unsigned char readcnt, const unsigned char *writearr, unsigned char *readarr)
{
uint8_t busy, data0, data1, data2;
uint8_t busy, writeenc;
do {
busy = inb(port) & 0x80;
} while (busy);
/* RDID */
outb(0x9f, port + 1);
/* Start IO, 33MHz, 3 input bytes, 0 output bytes*/
outb((0x5<<4)|(0x3<<2)|(0x0), port);
if (readcnt > 3) {
printf("%s called with unsupported readcnt %i\n",
__FUNCTION__, readcnt);
return 1;
}
switch (writecnt) {
case 1:
outb(writearr[0], port + 1);
writeenc = 0x0;
break;
case 2:
outb(writearr[0], port + 1);
outb(writearr[1], port + 7);
writeenc = 0x1;
break;
case 4:
outb(writearr[0], port + 1);
outb(writearr[1], port + 4);
outb(writearr[2], port + 3);
outb(writearr[3], port + 2);
writeenc = 0x2;
break;
case 5:
outb(writearr[0], port + 1);
outb(writearr[1], port + 4);
outb(writearr[2], port + 3);
outb(writearr[3], port + 2);
outb(writearr[4], port + 7);
writeenc = 0x3;
break;
default:
printf("%s called with unsupported writecnt %i\n",
__FUNCTION__, writecnt);
return 1;
}
/* Start IO, 33MHz, readcnt input bytes, writecnt output bytes. Note:
We can't use writecnt directly, but have to use a strange encoding */
outb((0x5 << 4) | ((readcnt & 0x3) << 2) | (writeenc), port);
do {
busy = inb(port) & 0x80;
} while (busy);
data0 = inb(port + 5);
data1 = inb(port + 6);
data2 = inb(port + 7);
printf("RDID returned %02x %02x %02x\n", data0, data1, data2);
return;
readarr[0] = inb(port + 5);
readarr[1] = inb(port + 6);
readarr[2] = inb(port + 7);
return 0;
}
static int it8716f_serial_rdid(uint16_t port, unsigned char *readarr)
{
const unsigned char cmd[] = JEDEC_RDID;
if (it8716f_spi_command(port, JEDEC_RDID_OUTSIZE, JEDEC_RDID_INSIZE, cmd, readarr))
return 1;
printf("RDID returned %02x %02x %02x\n", readarr[0], readarr[1], readarr[2]);
return 0;
}
static int it87xx_probe_serial_flash(const char *name)
{
uint16_t flashport;
flashport = find_ite_serial_flash_port(0x2e);
if (flashport)
it8716_serial_rdid(flashport);
flashport = find_ite_serial_flash_port(0x4e);
if (flashport)
it8716_serial_rdid(flashport);
it8716f_flashport = find_ite_serial_flash_port(ITE_SUPERIO_PORT1);
if (!it8716f_flashport)
it8716f_flashport = find_ite_serial_flash_port(ITE_SUPERIO_PORT2);
return (!it8716f_flashport);
}
int probe_spi(struct flashchip *flash)
{
unsigned char readarr[3];
uint8_t manuf_id;
uint16_t model_id;
if (it8716f_flashport) {
it8716f_serial_rdid(it8716f_flashport, readarr);
manuf_id = readarr[0];
model_id = (readarr[1] << 8) | readarr[2];
printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, manuf_id, model_id);
if (manuf_id == flash->manufacture_id && model_id == flash->model_id)
return 1;
}
return 0;
}