diff options
Diffstat (limited to 'board_enable.c')
| -rw-r--r-- | board_enable.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/board_enable.c b/board_enable.c index 84c6e3af..243251a6 100644 --- a/board_enable.c +++ b/board_enable.c @@ -30,176 +30,6 @@ #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) -{ - 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_serial_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 (id == 0x8716) { - /* 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"); - 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; -} - -/* 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, writeenc; - do { - busy = inb(port) & 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], 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); - 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) -{ - 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; -} - /* * Helper functions for many Winbond Super I/Os of the W836xx range. */ |