u-boot/board/overo/overo.c
Steve Sakoman a06e1629f4 ARMV7: OMAP: Overo: Autodetect presence/absence of transceiver on mmc2
An upcoming version of Overo uses a Wifi/BT module with 1.8V signaling,
eliminating the need for an external transceiver to handle the level
shifting.  This patch detects whether an external transceiver is present
and adjusts the pinmux settings as appropriate.

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2010-09-08 14:51:45 -04:00

227 lines
5.5 KiB
C

/*
* 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/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"
#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: 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");
}
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;
}