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imx: ventana: split read_eeprom into standalone file 

Split the read_eeprom function out so that it can be shared (ie with SPL)

Cc: Stefan Roese <sr@denx.de>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Andy Ng <andreas2025@gmail.com>
Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Tapani Utriainen <tapani@technexion.com>
Cc: Tom Rini <trini@ti.com>

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
This commit is contained in:
Tim Harvey 2014-06-02 16:13:25 -07:00 committed by Stefano Babic
parent 5bf497e3fd
commit 1badf2f47c
4 changed files with 102 additions and 89 deletions
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2
board/gateworks/gw_ventana/Makefile
View File

@ -6,5 +6,5 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-y := gw_ventana.o gsc.o
obj-y := gw_ventana.o gsc.o eeprom.o

89
board/gateworks/gw_ventana/eeprom.c Normal file
View File

@ -0,0 +1,89 @@
/*
* Copyright (C) 2014 Gateworks Corporation
* Author: Tim Harvey <tharvey@gateworks.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include "gsc.h"
#include "ventana_eeprom.h"
/* read ventana EEPROM, check for validity, and return baseboard type */
int
read_eeprom(int bus, struct ventana_board_info *info)
{
int i;
int chksum;
char baseboard;
int type;
unsigned char *buf = (unsigned char *)info;
memset(info, 0, sizeof(*info));
/*
* On a board with a missing/depleted backup battery for GSC, the
* board may be ready to probe the GSC before its firmware is
* running. We will wait here indefinately for the GSC/EEPROM.
*/
while (1) {
if (0 == i2c_set_bus_num(bus) &&
0 == i2c_probe(GSC_EEPROM_ADDR))
break;
mdelay(1);
}
/* read eeprom config section */
if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
puts("EEPROM: Failed to read EEPROM\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* sanity checks */
if (info->model[0] != 'G' || info->model[1] != 'W') {
puts("EEPROM: Invalid Model in EEPROM\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* validate checksum */
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
if ((info->chksum[0] != chksum>>8) ||
(info->chksum[1] != (chksum&0xff))) {
puts("EEPROM: Failed EEPROM checksum\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* original GW5400-A prototype */
baseboard = info->model[3];
if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
baseboard = '0';
switch (baseboard) {
case '0': /* original GW5400-A prototype */
type = GW54proto;
break;
case '1':
type = GW51xx;
break;
case '2':
type = GW52xx;
break;
case '3':
type = GW53xx;
break;
case '4':
type = GW54xx;
break;
default:
printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
type = GW_UNKNOWN;
break;
}
return type;
}

89
board/gateworks/gw_ventana/gw_ventana.c
View File

@ -84,15 +84,6 @@ DECLARE_GLOBAL_DATA_PTR;
*/
static struct ventana_board_info ventana_info;
enum {
GW54proto, /* original GW5400-A prototype */
GW51xx,
GW52xx,
GW53xx,
GW54xx,
GW_UNKNOWN,
};
int board_type;
/* UART1: Function varies per baseboard */
@ -499,84 +490,6 @@ static void setup_display(void)
}
#endif /* CONFIG_VIDEO_IPUV3 */
/* read ventana EEPROM, check for validity, and return baseboard type */
static int
read_eeprom(void)
{
int i;
int chksum;
char baseboard;
int type;
struct ventana_board_info *info = &ventana_info;
unsigned char *buf = (unsigned char *)&ventana_info;
memset(info, 0, sizeof(ventana_info));
/*
* On a board with a missing/depleted backup battery for GSC, the
* board may be ready to probe the GSC before its firmware is
* running. We will wait here indefinately for the GSC/EEPROM.
*/
while (1) {
if (0 == i2c_set_bus_num(I2C_GSC) &&
0 == i2c_probe(GSC_EEPROM_ADDR))
break;
mdelay(1);
}
/* read eeprom config section */
if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(ventana_info))) {
puts("EEPROM: Failed to read EEPROM\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* sanity checks */
if (info->model[0] != 'G' || info->model[1] != 'W') {
puts("EEPROM: Invalid Model in EEPROM\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* validate checksum */
for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
chksum += buf[i];
if ((info->chksum[0] != chksum>>8) ||
(info->chksum[1] != (chksum&0xff))) {
puts("EEPROM: Failed EEPROM checksum\n");
info->model[0] = 0;
return GW_UNKNOWN;
}
/* original GW5400-A prototype */
baseboard = info->model[3];
if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
baseboard = '0';
switch (baseboard) {
case '0': /* original GW5400-A prototype */
type = GW54proto;
break;
case '1':
type = GW51xx;
break;
case '2':
type = GW52xx;
break;
case '3':
type = GW53xx;
break;
case '4':
type = GW54xx;
break;
default:
printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
type = GW_UNKNOWN;
break;
}
return type;
}
/*
* Baseboard specific GPIO
*/
@ -1114,7 +1027,7 @@ int board_init(void)
setup_sata();
#endif
/* read Gateworks EEPROM into global struct (used later) */
board_type = read_eeprom();
board_type = read_eeprom(I2C_GSC, &ventana_info);
/* board-specifc GPIO iomux */
if (board_type < GW_UNKNOWN) {

11
board/gateworks/gw_ventana/ventana_eeprom.h
View File

@ -103,4 +103,15 @@ enum {
EECONFIG_RES15,
};
enum {
GW54proto, /* original GW5400-A prototype */
GW51xx,
GW52xx,
GW53xx,
GW54xx,
GW_UNKNOWN,
};
int read_eeprom(int bus, struct ventana_board_info *);
#endif