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![Koen Kooi](/assets/img/avatar_default.png)
Beagle 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. This patch is based on the Overo expansion board code. Signed-off-by: Koen Kooi <k-kooi@ti.com> Signed-off-by: Steve Sakoman <steve.sakoman@linaro.org> Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
276 lines
7.4 KiB
C
276 lines
7.4 KiB
C
/*
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* (C) Copyright 2004-2008
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Sunil Kumar <sunilsaini05@gmail.com>
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* Shashi Ranjan <shashiranjanmca05@gmail.com>
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*
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* Derived from Beagle Board and 3430 SDP code by
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* Richard Woodruff <r-woodruff2@ti.com>
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* Syed Mohammed Khasim <khasim@ti.com>
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*
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <twl4030.h>
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#include <asm/io.h>
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#include <asm/arch/mmc_host_def.h>
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#include <asm/arch/mux.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/gpio.h>
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#include <asm/mach-types.h>
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#include "beagle.h"
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#define TWL4030_I2C_BUS 0
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#define EXPANSION_EEPROM_I2C_BUS 1
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#define EXPANSION_EEPROM_I2C_ADDRESS 0x50
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#define TINCANTOOLS_ZIPPY 0x01000100
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#define TINCANTOOLS_ZIPPY2 0x02000100
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#define TINCANTOOLS_TRAINER 0x04000100
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#define TINCANTOOLS_SHOWDOG 0x03000100
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#define KBADC_BEAGLEFPGA 0x01000600
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#define BEAGLE_NO_EEPROM 0xffffffff
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static struct {
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unsigned int device_vendor;
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unsigned char revision;
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unsigned char content;
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char fab_revision[8];
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char env_var[16];
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char env_setting[64];
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} expansion_config;
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/*
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* Routine: board_init
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* Description: Early hardware init.
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*/
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int board_init(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
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/* board id for Linux */
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gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
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/* boot param addr */
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gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
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return 0;
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}
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/*
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* Routine: get_board_revision
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* Description: Detect if we are running on a Beagle revision Ax/Bx,
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* C1/2/3, C4 or xM. This can be done by reading
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* the level of GPIO173, GPIO172 and GPIO171. This should
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* result in
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* GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
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* GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
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* GPIO173, GPIO172, GPIO171: 1 0 1 => C4
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* GPIO173, GPIO172, GPIO171: 0 0 0 => xM
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*/
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int get_board_revision(void)
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{
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int revision;
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if (!omap_request_gpio(171) &&
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!omap_request_gpio(172) &&
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!omap_request_gpio(173)) {
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omap_set_gpio_direction(171, 1);
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omap_set_gpio_direction(172, 1);
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omap_set_gpio_direction(173, 1);
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revision = omap_get_gpio_datain(173) << 2 |
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omap_get_gpio_datain(172) << 1 |
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omap_get_gpio_datain(171);
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omap_free_gpio(171);
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omap_free_gpio(172);
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omap_free_gpio(173);
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} else {
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printf("Error: unable to acquire board revision GPIOs\n");
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revision = -1;
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}
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return revision;
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}
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/*
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* Routine: get_expansion_id
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* Description: This function checks for expansion board by checking I2C
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* bus 1 for the availability of an AT24C01B serial EEPROM.
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* returns the device_vendor field from the EEPROM
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*/
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unsigned int get_expansion_id(void)
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{
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i2c_set_bus_num(EXPANSION_EEPROM_I2C_BUS);
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/* return BEAGLE_NO_EEPROM if eeprom doesn't respond */
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if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
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i2c_set_bus_num(TWL4030_I2C_BUS);
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return BEAGLE_NO_EEPROM;
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}
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/* read configuration data */
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i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 1, (u8 *)&expansion_config,
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sizeof(expansion_config));
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i2c_set_bus_num(TWL4030_I2C_BUS);
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return expansion_config.device_vendor;
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}
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/*
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* Routine: misc_init_r
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* Description: Configure board specific parts
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*/
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int misc_init_r(void)
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{
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struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
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struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
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switch (get_board_revision()) {
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case REVISION_AXBX:
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printf("Beagle Rev Ax/Bx\n");
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setenv("beaglerev", "AxBx");
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setenv("mpurate", "600");
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break;
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case REVISION_CX:
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printf("Beagle Rev C1/C2/C3\n");
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setenv("beaglerev", "Cx");
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setenv("mpurate", "600");
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MUX_BEAGLE_C();
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break;
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case REVISION_C4:
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printf("Beagle Rev C4\n");
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setenv("beaglerev", "C4");
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setenv("mpurate", "720");
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MUX_BEAGLE_C();
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/* Set VAUX2 to 1.8V for EHCI PHY */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
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TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
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TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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break;
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case REVISION_XM:
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printf("Beagle xM Rev A\n");
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setenv("beaglerev", "xMA");
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setenv("mpurate", "1000");
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MUX_BEAGLE_XM();
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/* Set VAUX2 to 1.8V for EHCI PHY */
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twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
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TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
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TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
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TWL4030_PM_RECEIVER_DEV_GRP_P1);
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break;
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default:
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printf("Beagle unknown 0x%02x\n", get_board_revision());
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}
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switch (get_expansion_id()) {
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case TINCANTOOLS_ZIPPY:
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printf("Recognized Tincantools Zippy board (rev %d %s)\n",
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expansion_config.revision,
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expansion_config.fab_revision);
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MUX_TINCANTOOLS_ZIPPY();
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setenv("buddy", "zippy");
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break;
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case TINCANTOOLS_ZIPPY2:
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printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
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expansion_config.revision,
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expansion_config.fab_revision);
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MUX_TINCANTOOLS_ZIPPY();
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setenv("buddy", "zippy2");
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break;
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case TINCANTOOLS_TRAINER:
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printf("Recognized Tincantools Trainer board (rev %d %s)\n",
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expansion_config.revision,
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expansion_config.fab_revision);
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MUX_TINCANTOOLS_ZIPPY();
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MUX_TINCANTOOLS_TRAINER();
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setenv("buddy", "trainer");
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break;
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case TINCANTOOLS_SHOWDOG:
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printf("Recognized Tincantools Showdow board (rev %d %s)\n",
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expansion_config.revision,
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expansion_config.fab_revision);
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/* Place holder for DSS2 definition for showdog lcd */
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setenv("defaultdisplay", "showdoglcd");
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setenv("buddy", "showdog");
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break;
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case KBADC_BEAGLEFPGA:
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printf("Recognized KBADC Beagle FPGA board\n");
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MUX_KBADC_BEAGLEFPGA();
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setenv("buddy", "beaglefpga");
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break;
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case BEAGLE_NO_EEPROM:
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printf("No EEPROM on expansion board\n");
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setenv("buddy", "none");
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break;
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default:
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printf("Unrecognized expansion board: %x\n",
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expansion_config.device_vendor);
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setenv("buddy", "unknown");
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}
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if (expansion_config.content == 1)
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setenv(expansion_config.env_var, expansion_config.env_setting);
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twl4030_power_init();
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twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
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/* Configure GPIOs to output */
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writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
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writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
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GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
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/* Set GPIOs */
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writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
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&gpio6_base->setdataout);
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writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
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GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
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dieid_num_r();
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return 0;
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}
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/*
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* Routine: set_muxconf_regs
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* Description: Setting up the configuration Mux registers specific to the
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* hardware. Many pins need to be moved from protect to primary
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* mode.
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*/
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void set_muxconf_regs(void)
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{
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MUX_BEAGLE();
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}
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#ifdef CONFIG_GENERIC_MMC
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int board_mmc_init(bd_t *bis)
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{
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omap_mmc_init(0);
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return 0;
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}
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#endif
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