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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
Stefano Babic
parent
5bf497e3fd
commit
1badf2f47c
4 changed files with 102 additions and 89 deletions
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@ -6,5 +6,5 @@
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# SPDX-License-Identifier: GPL-2.0+
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# SPDX-License-Identifier: GPL-2.0+
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#
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#
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obj-y := gw_ventana.o gsc.o
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obj-y := gw_ventana.o gsc.o eeprom.o
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89
board/gateworks/gw_ventana/eeprom.c
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89
board/gateworks/gw_ventana/eeprom.c
Normal file
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@ -0,0 +1,89 @@
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/*
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* Copyright (C) 2014 Gateworks Corporation
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* Author: Tim Harvey <tharvey@gateworks.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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#include "gsc.h"
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#include "ventana_eeprom.h"
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/* read ventana EEPROM, check for validity, and return baseboard type */
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int
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read_eeprom(int bus, struct ventana_board_info *info)
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{
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int i;
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int chksum;
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char baseboard;
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int type;
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unsigned char *buf = (unsigned char *)info;
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memset(info, 0, sizeof(*info));
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/*
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* On a board with a missing/depleted backup battery for GSC, the
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* board may be ready to probe the GSC before its firmware is
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* running. We will wait here indefinately for the GSC/EEPROM.
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*/
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while (1) {
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if (0 == i2c_set_bus_num(bus) &&
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0 == i2c_probe(GSC_EEPROM_ADDR))
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break;
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mdelay(1);
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}
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/* read eeprom config section */
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if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) {
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puts("EEPROM: Failed to read EEPROM\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* sanity checks */
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if (info->model[0] != 'G' || info->model[1] != 'W') {
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puts("EEPROM: Invalid Model in EEPROM\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* validate checksum */
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for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
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chksum += buf[i];
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if ((info->chksum[0] != chksum>>8) ||
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(info->chksum[1] != (chksum&0xff))) {
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puts("EEPROM: Failed EEPROM checksum\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* original GW5400-A prototype */
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baseboard = info->model[3];
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if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
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baseboard = '0';
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switch (baseboard) {
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case '0': /* original GW5400-A prototype */
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type = GW54proto;
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break;
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case '1':
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type = GW51xx;
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break;
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case '2':
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type = GW52xx;
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break;
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case '3':
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type = GW53xx;
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break;
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case '4':
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type = GW54xx;
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break;
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default:
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printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
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type = GW_UNKNOWN;
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break;
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}
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return type;
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}
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@ -84,15 +84,6 @@ DECLARE_GLOBAL_DATA_PTR;
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*/
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*/
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static struct ventana_board_info ventana_info;
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static struct ventana_board_info ventana_info;
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enum {
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GW54proto, /* original GW5400-A prototype */
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GW51xx,
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GW52xx,
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GW53xx,
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GW54xx,
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GW_UNKNOWN,
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};
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int board_type;
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int board_type;
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/* UART1: Function varies per baseboard */
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/* UART1: Function varies per baseboard */
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@ -499,84 +490,6 @@ static void setup_display(void)
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}
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}
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#endif /* CONFIG_VIDEO_IPUV3 */
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#endif /* CONFIG_VIDEO_IPUV3 */
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/* read ventana EEPROM, check for validity, and return baseboard type */
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static int
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read_eeprom(void)
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{
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int i;
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int chksum;
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char baseboard;
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int type;
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struct ventana_board_info *info = &ventana_info;
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unsigned char *buf = (unsigned char *)&ventana_info;
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memset(info, 0, sizeof(ventana_info));
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/*
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* On a board with a missing/depleted backup battery for GSC, the
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* board may be ready to probe the GSC before its firmware is
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* running. We will wait here indefinately for the GSC/EEPROM.
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*/
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while (1) {
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if (0 == i2c_set_bus_num(I2C_GSC) &&
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0 == i2c_probe(GSC_EEPROM_ADDR))
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break;
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mdelay(1);
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}
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/* read eeprom config section */
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if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(ventana_info))) {
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puts("EEPROM: Failed to read EEPROM\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* sanity checks */
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if (info->model[0] != 'G' || info->model[1] != 'W') {
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puts("EEPROM: Invalid Model in EEPROM\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* validate checksum */
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for (chksum = 0, i = 0; i < sizeof(*info)-2; i++)
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chksum += buf[i];
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if ((info->chksum[0] != chksum>>8) ||
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(info->chksum[1] != (chksum&0xff))) {
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puts("EEPROM: Failed EEPROM checksum\n");
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info->model[0] = 0;
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return GW_UNKNOWN;
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}
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/* original GW5400-A prototype */
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baseboard = info->model[3];
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if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0)
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baseboard = '0';
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switch (baseboard) {
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case '0': /* original GW5400-A prototype */
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type = GW54proto;
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break;
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case '1':
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type = GW51xx;
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break;
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case '2':
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type = GW52xx;
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break;
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case '3':
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type = GW53xx;
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break;
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case '4':
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type = GW54xx;
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break;
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default:
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printf("EEPROM: Unknown model in EEPROM: %s\n", info->model);
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type = GW_UNKNOWN;
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break;
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}
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return type;
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}
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/*
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/*
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* Baseboard specific GPIO
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* Baseboard specific GPIO
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*/
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*/
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@ -1114,7 +1027,7 @@ int board_init(void)
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setup_sata();
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setup_sata();
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#endif
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#endif
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/* read Gateworks EEPROM into global struct (used later) */
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/* read Gateworks EEPROM into global struct (used later) */
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board_type = read_eeprom();
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board_type = read_eeprom(I2C_GSC, &ventana_info);
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/* board-specifc GPIO iomux */
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/* board-specifc GPIO iomux */
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if (board_type < GW_UNKNOWN) {
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if (board_type < GW_UNKNOWN) {
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@ -103,4 +103,15 @@ enum {
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EECONFIG_RES15,
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EECONFIG_RES15,
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};
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};
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enum {
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GW54proto, /* original GW5400-A prototype */
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GW51xx,
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GW52xx,
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GW53xx,
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GW54xx,
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GW_UNKNOWN,
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};
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int read_eeprom(int bus, struct ventana_board_info *);
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#endif
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#endif
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