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u-boot/board/overo/overo.c
Steve Sakoman d64b5b8915 ARMV7: OMAP3: Add expansion board detection for Overo 
Overo expansion boards contain an i2c eeprom to identify themselves.
This patch adds code to read and parse the eeprom contents.  It prints
the expansion board name and revision and modifies environment variables
as appropriate.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-11-04 15:27:06 -04:00

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/*
* Maintainer : Steve Sakoman <steve@sakoman.com>
*
* Derived from Beagle Board, 3430 SDP, and OMAP3EVM code by
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@ti.com>
* Sunil Kumar <sunilsaini05@gmail.com>
* Shashi Ranjan <shashiranjanmca05@gmail.com>
*
* (C) Copyright 2004-2008
* Texas Instruments, <www.ti.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <netdev.h>
#include <twl4030.h>
#include <asm/io.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/mux.h>
#include <asm/arch/mem.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>
#include <asm/mach-types.h>
#include "overo.h"
#define TWL4030_I2C_BUS 0
#define EXPANSION_EEPROM_I2C_BUS 2
#define EXPANSION_EEPROM_I2C_ADDRESS 0x51
#define GUMSTIX_SUMMIT 0x01000200
#define GUMSTIX_TOBI 0x02000200
#define GUMSTIX_TOBI_DUO 0x03000200
#define GUMSTIX_PALO35 0x04000200
#define GUMSTIX_PALO43 0x05000200
#define GUMSTIX_CHESTNUT43 0x06000200
#define GUMSTIX_PINTO 0x07000200
#define GUMSTIX_GALLOP43 0x08000200
#define ETTUS_USRP_E 0x01000300
#define GUMSTIX_NO_EEPROM 0xffffffff
static struct {
unsigned int device_vendor;
unsigned char revision;
unsigned char content;
char fab_revision[8];
char env_var[16];
char env_setting[64];
} expansion_config;
#if defined(CONFIG_CMD_NET)
static void setup_net_chip(void);
#endif
/* GPMC definitions for LAN9221 chips on Tobi expansion boards */
static const u32 gpmc_lan_config[] = {
NET_LAN9221_GPMC_CONFIG1,
NET_LAN9221_GPMC_CONFIG2,
NET_LAN9221_GPMC_CONFIG3,
NET_LAN9221_GPMC_CONFIG4,
NET_LAN9221_GPMC_CONFIG5,
NET_LAN9221_GPMC_CONFIG6,
/*CONFIG7- computed as params */
};
/*
* Routine: board_init
* Description: Early hardware init.
*/
int board_init(void)
{
DECLARE_GLOBAL_DATA_PTR;
gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
/* board id for Linux */
gd->bd->bi_arch_number = MACH_TYPE_OVERO;
/* boot param addr */
gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
return 0;
}
/*
* Routine: get_board_revision
* Description: Returns the board revision
*/
int get_board_revision(void)
{
int revision;
if (!omap_request_gpio(112) &&
!omap_request_gpio(113) &&
!omap_request_gpio(115)) {
omap_set_gpio_direction(112, 1);
omap_set_gpio_direction(113, 1);
omap_set_gpio_direction(115, 1);
revision = omap_get_gpio_datain(115) << 2 |
omap_get_gpio_datain(113) << 1 |
omap_get_gpio_datain(112);
omap_free_gpio(112);
omap_free_gpio(113);
omap_free_gpio(115);
} else {
printf("Error: unable to acquire board revision GPIOs\n");
revision = -1;
}
return revision;
}
/*
* Routine: get_sdio2_config
* Description: Return information about the wifi module connection
* Returns 0 if the module connects though a level translator
* Returns 1 if the module connects directly
*/
int get_sdio2_config(void)
{
int sdio_direct;
if (!omap_request_gpio(130) && !omap_request_gpio(139)) {
omap_set_gpio_direction(130, 0);
omap_set_gpio_direction(139, 1);
sdio_direct = 1;
omap_set_gpio_dataout(130, 0);
if (omap_get_gpio_datain(139) == 0) {
omap_set_gpio_dataout(130, 1);
if (omap_get_gpio_datain(139) == 1)
sdio_direct = 0;
}
omap_free_gpio(130);
omap_free_gpio(139);
} else {
printf("Error: unable to acquire sdio2 clk GPIOs\n");
sdio_direct = -1;
}
return sdio_direct;
}
/*
* Routine: get_expansion_id
* Description: This function checks for expansion board by checking I2C
* bus 2 for the availability of an AT24C01B serial EEPROM.
* returns the device_vendor field from the EEPROM
*/
unsigned int get_expansion_id(void)
{
i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
/* return GUMSTIX_NO_EEPROM if eeprom doesn't respond */
if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
i2c_set_bus_num(TWL4030_I2C_BUS);
return GUMSTIX_NO_EEPROM;
}
/* read configuration data */
i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
sizeof(expansion_config));
i2c_set_bus_num(TWL4030_I2C_BUS);
return expansion_config.device_vendor;
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
int misc_init_r(void)
{
twl4030_power_init();
twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
#if defined(CONFIG_CMD_NET)
setup_net_chip();
#endif
printf("Board revision: %d\n", get_board_revision());
switch (get_sdio2_config()) {
case 0:
printf("Tranceiver detected on mmc2\n");
MUX_OVERO_SDIO2_TRANSCEIVER();
break;
case 1:
printf("Direct connection on mmc2\n");
MUX_OVERO_SDIO2_DIRECT();
break;
default:
printf("Unable to detect mmc2 connection type\n");
}
switch (get_expansion_id()) {
case GUMSTIX_SUMMIT:
printf("Recognized Summit expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "dvi");
break;
case GUMSTIX_TOBI:
printf("Recognized Tobi expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "dvi");
break;
case GUMSTIX_TOBI_DUO:
printf("Recognized Tobi Duo expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
break;
case GUMSTIX_PALO35:
printf("Recognized Palo35 expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "lcd35");
break;
case GUMSTIX_PALO43:
printf("Recognized Palo43 expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "lcd43");
break;
case GUMSTIX_CHESTNUT43:
printf("Recognized Chestnut43 expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "lcd43");
break;
case GUMSTIX_PINTO:
printf("Recognized Pinto expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
break;
case GUMSTIX_GALLOP43:
printf("Recognized Gallop43 expansion board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
setenv("defaultdisplay", "lcd43");
break;
case ETTUS_USRP_E:
printf("Recognized Ettus Research USRP-E (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
MUX_USRP_E();
setenv("defaultdisplay", "dvi");
break;
case GUMSTIX_NO_EEPROM:
printf("No EEPROM on expansion board\n");
break;
default:
printf("Unrecognized expansion board\n");
}
if (expansion_config.content == 1)
setenv(expansion_config.env_var, expansion_config.env_setting);
dieid_num_r();
return 0;
}
/*
* Routine: set_muxconf_regs
* Description: Setting up the configuration Mux registers specific to the
* hardware. Many pins need to be moved from protect to primary
* mode.
*/
void set_muxconf_regs(void)
{
MUX_OVERO();
}
#if defined(CONFIG_CMD_NET)
/*
* Routine: setup_net_chip
* Description: Setting up the configuration GPMC registers specific to the
* Ethernet hardware.
*/
static void setup_net_chip(void)
{
struct ctrl *ctrl_base = (struct ctrl *)OMAP34XX_CTRL_BASE;
/* first lan chip */
enable_gpmc_cs_config(gpmc_lan_config, &gpmc_cfg->cs[5], 0x2C000000,
GPMC_SIZE_16M);
/* second lan chip */
enable_gpmc_cs_config(gpmc_lan_config, &gpmc_cfg->cs[4], 0x2B000000,
GPMC_SIZE_16M);
/* Enable off mode for NWE in PADCONF_GPMC_NWE register */
writew(readw(&ctrl_base ->gpmc_nwe) | 0x0E00, &ctrl_base->gpmc_nwe);
/* Enable off mode for NOE in PADCONF_GPMC_NADV_ALE register */
writew(readw(&ctrl_base->gpmc_noe) | 0x0E00, &ctrl_base->gpmc_noe);
/* Enable off mode for ALE in PADCONF_GPMC_NADV_ALE register */
writew(readw(&ctrl_base->gpmc_nadv_ale) | 0x0E00,
&ctrl_base->gpmc_nadv_ale);
/* Make GPIO 64 as output pin and send a magic pulse through it */
if (!omap_request_gpio(64)) {
omap_set_gpio_direction(64, 0);
omap_set_gpio_dataout(64, 1);
udelay(1);
omap_set_gpio_dataout(64, 0);
udelay(1);
omap_set_gpio_dataout(64, 1);
}
}
#endif
int board_eth_init(bd_t *bis)
{
int rc = 0;
#ifdef CONFIG_SMC911X
rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
#endif
return rc;
}
#ifdef CONFIG_GENERIC_MMC
int board_mmc_init(bd_t *bis)
{
omap_mmc_init(0);
return 0;
}
#endif
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