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https://github.com/brain-hackers/u-boot-brain
synced 2024-08-15 06:33:45 +09:00
![Jean-Jacques Hiblot](/assets/img/avatar_default.png)
DM_I2C_COMPAT is a compatibility layer that allows using the non-DM I2C API when DM_I2C is used. The goal is to eventually remove DM_I2C_COMPAT when all I2C "clients" have been migrated to use the DM API. This a step in that direction for the TI based platforms. Build tested with buildman: buildman -dle am33xx ti omap3 omap4 omap5 davinci keystone boot tested with: am335x_evm, am335x_boneblack, am335x_boneblack_vboot (DM version), am57xx_evm, dra7xx_evm, k2g_evm, am437x_evm Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Heiko Schocher <hs@denx.de>
465 lines
10 KiB
C
465 lines
10 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Library to support early TI EVM EEPROM handling
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*
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* Copyright (C) 2015-2016 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla
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* Steve Kipisz
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*/
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#include <common.h>
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#include <asm/omap_common.h>
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#include <dm/uclass.h>
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#include <i2c.h>
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#include "board_detect.h"
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#if !defined(CONFIG_DM_I2C)
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/**
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* ti_i2c_eeprom_init - Initialize an i2c bus and probe for a device
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* @i2c_bus: i2c bus number to initialize
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* @dev_addr: Device address to probe for
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*
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* Return: 0 on success or corresponding error on failure.
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*/
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static int __maybe_unused ti_i2c_eeprom_init(int i2c_bus, int dev_addr)
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{
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int rc;
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if (i2c_bus >= 0) {
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rc = i2c_set_bus_num(i2c_bus);
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if (rc)
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return rc;
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}
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return i2c_probe(dev_addr);
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}
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/**
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* ti_i2c_eeprom_read - Read data from an EEPROM
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* @dev_addr: The device address of the EEPROM
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* @offset: Offset to start reading in the EEPROM
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* @ep: Pointer to a buffer to read into
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* @epsize: Size of buffer
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*
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* Return: 0 on success or corresponding result of i2c_read
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*/
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static int __maybe_unused ti_i2c_eeprom_read(int dev_addr, int offset,
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uchar *ep, int epsize)
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{
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return i2c_read(dev_addr, offset, 2, ep, epsize);
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}
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#endif
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/**
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* ti_eeprom_string_cleanup() - Handle eeprom programming errors
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* @s: eeprom string (should be NULL terminated)
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*
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* Some Board manufacturers do not add a NULL termination at the
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* end of string, instead some binary information is kludged in, hence
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* convert the string to just printable characters of ASCII chart.
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*/
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static void __maybe_unused ti_eeprom_string_cleanup(char *s)
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{
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int i, l;
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l = strlen(s);
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for (i = 0; i < l; i++, s++)
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if (*s < ' ' || *s > '~') {
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*s = 0;
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break;
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}
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}
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__weak void gpi2c_init(void)
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{
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}
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static int __maybe_unused ti_i2c_eeprom_get(int bus_addr, int dev_addr,
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u32 header, u32 size, uint8_t *ep)
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{
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u32 hdr_read;
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int rc;
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#if defined(CONFIG_DM_I2C)
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struct udevice *dev;
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struct udevice *bus;
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rc = uclass_get_device_by_seq(UCLASS_I2C, bus_addr, &bus);
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if (rc)
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return rc;
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rc = i2c_get_chip(bus, dev_addr, 1, &dev);
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if (rc)
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return rc;
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/*
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* Read the header first then only read the other contents.
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*/
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rc = i2c_set_chip_offset_len(dev, 2);
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if (rc)
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return rc;
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rc = dm_i2c_read(dev, 0, (uint8_t *)&hdr_read, 4);
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if (rc)
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return rc;
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/* Corrupted data??? */
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if (hdr_read != header) {
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rc = dm_i2c_read(dev, 0, (uint8_t *)&hdr_read, 4);
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/*
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* read the eeprom header using i2c again, but use only a
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* 1 byte address (some legacy boards need this..)
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*/
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if (rc) {
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rc = i2c_set_chip_offset_len(dev, 1);
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if (rc)
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return rc;
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rc = dm_i2c_read(dev, 0, (uint8_t *)&hdr_read, 4);
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}
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if (rc)
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return rc;
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}
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if (hdr_read != header)
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return -1;
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rc = dm_i2c_read(dev, 0, ep, size);
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if (rc)
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return rc;
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#else
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u32 byte;
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gpi2c_init();
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rc = ti_i2c_eeprom_init(bus_addr, dev_addr);
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if (rc)
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return rc;
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/*
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* Read the header first then only read the other contents.
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*/
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byte = 2;
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rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read, 4);
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if (rc)
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return rc;
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/* Corrupted data??? */
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if (hdr_read != header) {
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rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read, 4);
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/*
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* read the eeprom header using i2c again, but use only a
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* 1 byte address (some legacy boards need this..)
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*/
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byte = 1;
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if (rc) {
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rc = i2c_read(dev_addr, 0x0, byte, (uint8_t *)&hdr_read,
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4);
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}
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if (rc)
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return rc;
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}
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if (hdr_read != header)
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return -1;
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rc = i2c_read(dev_addr, 0x0, byte, ep, size);
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if (rc)
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return rc;
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#endif
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return 0;
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}
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int __maybe_unused ti_i2c_eeprom_am_set(const char *name, const char *rev)
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{
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struct ti_common_eeprom *ep;
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if (!name || !rev)
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return -1;
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ep = TI_EEPROM_DATA;
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if (ep->header == TI_EEPROM_HEADER_MAGIC)
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goto already_set;
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/* Set to 0 all fields */
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memset(ep, 0, sizeof(*ep));
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strncpy(ep->name, name, TI_EEPROM_HDR_NAME_LEN);
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strncpy(ep->version, rev, TI_EEPROM_HDR_REV_LEN);
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/* Some dummy serial number to identify the platform */
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strncpy(ep->serial, "0000", TI_EEPROM_HDR_SERIAL_LEN);
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/* Mark it with a valid header */
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ep->header = TI_EEPROM_HEADER_MAGIC;
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already_set:
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return 0;
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}
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int __maybe_unused ti_i2c_eeprom_am_get(int bus_addr, int dev_addr)
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{
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int rc;
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struct ti_am_eeprom am_ep;
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struct ti_common_eeprom *ep;
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ep = TI_EEPROM_DATA;
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#ifndef CONFIG_SPL_BUILD
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if (ep->header == TI_EEPROM_HEADER_MAGIC)
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return 0; /* EEPROM has already been read */
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#endif
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/* Initialize with a known bad marker for i2c fails.. */
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ep->header = TI_DEAD_EEPROM_MAGIC;
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ep->name[0] = 0x0;
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ep->version[0] = 0x0;
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ep->serial[0] = 0x0;
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ep->config[0] = 0x0;
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rc = ti_i2c_eeprom_get(bus_addr, dev_addr, TI_EEPROM_HEADER_MAGIC,
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sizeof(am_ep), (uint8_t *)&am_ep);
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if (rc)
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return rc;
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ep->header = am_ep.header;
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strlcpy(ep->name, am_ep.name, TI_EEPROM_HDR_NAME_LEN + 1);
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ti_eeprom_string_cleanup(ep->name);
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/* BeagleBone Green '1' eeprom, board_rev: 0x1a 0x00 0x00 0x00 */
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if (am_ep.version[0] == 0x1a && am_ep.version[1] == 0x00 &&
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am_ep.version[2] == 0x00 && am_ep.version[3] == 0x00)
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strlcpy(ep->version, "BBG1", TI_EEPROM_HDR_REV_LEN + 1);
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else
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strlcpy(ep->version, am_ep.version, TI_EEPROM_HDR_REV_LEN + 1);
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ti_eeprom_string_cleanup(ep->version);
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strlcpy(ep->serial, am_ep.serial, TI_EEPROM_HDR_SERIAL_LEN + 1);
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ti_eeprom_string_cleanup(ep->serial);
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strlcpy(ep->config, am_ep.config, TI_EEPROM_HDR_CONFIG_LEN + 1);
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ti_eeprom_string_cleanup(ep->config);
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memcpy(ep->mac_addr, am_ep.mac_addr,
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TI_EEPROM_HDR_NO_OF_MAC_ADDR * TI_EEPROM_HDR_ETH_ALEN);
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return 0;
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}
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int __maybe_unused ti_i2c_eeprom_dra7_get(int bus_addr, int dev_addr)
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{
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int rc, offset = 0;
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struct dra7_eeprom dra7_ep;
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struct ti_common_eeprom *ep;
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ep = TI_EEPROM_DATA;
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#ifndef CONFIG_SPL_BUILD
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if (ep->header == DRA7_EEPROM_HEADER_MAGIC)
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return 0; /* EEPROM has already been read */
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#endif
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/* Initialize with a known bad marker for i2c fails.. */
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ep->header = TI_DEAD_EEPROM_MAGIC;
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ep->name[0] = 0x0;
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ep->version[0] = 0x0;
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ep->serial[0] = 0x0;
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ep->config[0] = 0x0;
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ep->emif1_size = 0;
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ep->emif2_size = 0;
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rc = ti_i2c_eeprom_get(bus_addr, dev_addr, DRA7_EEPROM_HEADER_MAGIC,
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sizeof(dra7_ep), (uint8_t *)&dra7_ep);
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if (rc)
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return rc;
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ep->header = dra7_ep.header;
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strlcpy(ep->name, dra7_ep.name, TI_EEPROM_HDR_NAME_LEN + 1);
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ti_eeprom_string_cleanup(ep->name);
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offset = dra7_ep.version_major - 1;
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/* Rev F is skipped */
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if (offset >= 5)
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offset = offset + 1;
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snprintf(ep->version, TI_EEPROM_HDR_REV_LEN + 1, "%c.%d",
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'A' + offset, dra7_ep.version_minor);
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ti_eeprom_string_cleanup(ep->version);
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ep->emif1_size = (u64)dra7_ep.emif1_size;
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ep->emif2_size = (u64)dra7_ep.emif2_size;
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strlcpy(ep->config, dra7_ep.config, TI_EEPROM_HDR_CONFIG_LEN + 1);
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ti_eeprom_string_cleanup(ep->config);
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return 0;
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}
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bool __maybe_unused board_ti_is(char *name_tag)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (ep->header == TI_DEAD_EEPROM_MAGIC)
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return false;
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return !strncmp(ep->name, name_tag, TI_EEPROM_HDR_NAME_LEN);
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}
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bool __maybe_unused board_ti_rev_is(char *rev_tag, int cmp_len)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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int l;
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if (ep->header == TI_DEAD_EEPROM_MAGIC)
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return false;
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l = cmp_len > TI_EEPROM_HDR_REV_LEN ? TI_EEPROM_HDR_REV_LEN : cmp_len;
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return !strncmp(ep->version, rev_tag, l);
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}
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char * __maybe_unused board_ti_get_rev(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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/* if ep->header == TI_DEAD_EEPROM_MAGIC, this is empty already */
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return ep->version;
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}
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char * __maybe_unused board_ti_get_config(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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/* if ep->header == TI_DEAD_EEPROM_MAGIC, this is empty already */
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return ep->config;
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}
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char * __maybe_unused board_ti_get_name(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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/* if ep->header == TI_DEAD_EEPROM_MAGIC, this is empty already */
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return ep->name;
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}
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void __maybe_unused
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board_ti_get_eth_mac_addr(int index,
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u8 mac_addr[TI_EEPROM_HDR_ETH_ALEN])
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (ep->header == TI_DEAD_EEPROM_MAGIC)
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goto fail;
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if (index < 0 || index >= TI_EEPROM_HDR_NO_OF_MAC_ADDR)
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goto fail;
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memcpy(mac_addr, ep->mac_addr[index], TI_EEPROM_HDR_ETH_ALEN);
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return;
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fail:
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memset(mac_addr, 0, TI_EEPROM_HDR_ETH_ALEN);
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}
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u64 __maybe_unused board_ti_get_emif1_size(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (ep->header != DRA7_EEPROM_HEADER_MAGIC)
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return 0;
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return ep->emif1_size;
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}
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u64 __maybe_unused board_ti_get_emif2_size(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (ep->header != DRA7_EEPROM_HEADER_MAGIC)
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return 0;
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return ep->emif2_size;
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}
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void __maybe_unused set_board_info_env(char *name)
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{
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char *unknown = "unknown";
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (name)
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env_set("board_name", name);
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else if (ep->name)
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env_set("board_name", ep->name);
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else
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env_set("board_name", unknown);
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if (ep->version)
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env_set("board_rev", ep->version);
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else
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env_set("board_rev", unknown);
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if (ep->serial)
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env_set("board_serial", ep->serial);
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else
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env_set("board_serial", unknown);
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}
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static u64 mac_to_u64(u8 mac[6])
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{
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int i;
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u64 addr = 0;
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for (i = 0; i < 6; i++) {
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addr <<= 8;
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addr |= mac[i];
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}
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return addr;
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}
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static void u64_to_mac(u64 addr, u8 mac[6])
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{
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mac[5] = addr;
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mac[4] = addr >> 8;
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mac[3] = addr >> 16;
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mac[2] = addr >> 24;
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mac[1] = addr >> 32;
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mac[0] = addr >> 40;
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}
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void board_ti_set_ethaddr(int index)
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{
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uint8_t mac_addr[6];
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int i;
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u64 mac1, mac2;
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u8 mac_addr1[6], mac_addr2[6];
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int num_macs;
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/*
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* Export any Ethernet MAC addresses from EEPROM.
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* The 2 MAC addresses in EEPROM define the address range.
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*/
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board_ti_get_eth_mac_addr(0, mac_addr1);
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board_ti_get_eth_mac_addr(1, mac_addr2);
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if (is_valid_ethaddr(mac_addr1) && is_valid_ethaddr(mac_addr2)) {
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mac1 = mac_to_u64(mac_addr1);
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mac2 = mac_to_u64(mac_addr2);
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/* must contain an address range */
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num_macs = mac2 - mac1 + 1;
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if (num_macs <= 0)
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return;
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if (num_macs > 50) {
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printf("%s: Too many MAC addresses: %d. Limiting to 50\n",
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__func__, num_macs);
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num_macs = 50;
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}
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for (i = 0; i < num_macs; i++) {
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u64_to_mac(mac1 + i, mac_addr);
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if (is_valid_ethaddr(mac_addr)) {
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eth_env_set_enetaddr_by_index("eth", i + index,
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mac_addr);
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}
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}
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}
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}
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bool __maybe_unused board_ti_was_eeprom_read(void)
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{
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struct ti_common_eeprom *ep = TI_EEPROM_DATA;
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if (ep->header == TI_EEPROM_HEADER_MAGIC)
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return true;
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else
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return false;
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}
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