u-boot/board/ti/beagle/beagle.c
Joe Hershberger b5db0a068a omap: Don't use gpio_free to change direction to input
gpio_free() should not have the side effect of setting the line to input since this prevents the gpio command from being able to set a line as output.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Joe Hershberger <joe.hershberger@gmail.com>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
2011-10-27 21:56:35 +02:00

530 lines
14 KiB
C

/*
* (C) Copyright 2004-2008
* Texas Instruments, <www.ti.com>
*
* Author :
* Sunil Kumar <sunilsaini05@gmail.com>
* Shashi Ranjan <shashiranjanmca05@gmail.com>
*
* Derived from Beagle Board and 3430 SDP code by
* Richard Woodruff <r-woodruff2@ti.com>
* Syed Mohammed Khasim <khasim@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>
#ifdef CONFIG_STATUS_LED
#include <status_led.h>
#endif
#include <twl4030.h>
#include <asm/io.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/mux.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/mach-types.h>
#ifdef CONFIG_USB_EHCI
#include <usb.h>
#include <asm/arch/clocks.h>
#include <asm/arch/clocks_omap3.h>
#include <asm/arch/ehci_omap3.h>
/* from drivers/usb/host/ehci-core.h */
extern struct ehci_hccr *hccr;
extern volatile struct ehci_hcor *hcor;
#endif
#include "beagle.h"
#include <command.h>
#define pr_debug(fmt, args...) debug(fmt, ##args)
#define TWL4030_I2C_BUS 0
#define EXPANSION_EEPROM_I2C_BUS 1
#define EXPANSION_EEPROM_I2C_ADDRESS 0x50
#define TINCANTOOLS_ZIPPY 0x01000100
#define TINCANTOOLS_ZIPPY2 0x02000100
#define TINCANTOOLS_TRAINER 0x04000100
#define TINCANTOOLS_SHOWDOG 0x03000100
#define KBADC_BEAGLEFPGA 0x01000600
#define LW_BEAGLETOUCH 0x01000700
#define BRAINMUX_LCDOG 0x01000800
#define BRAINMUX_LCDOGTOUCH 0x02000800
#define BBTOYS_WIFI 0x01000B00
#define BBTOYS_VGA 0x02000B00
#define BBTOYS_LCD 0x03000B00
#define BEAGLE_NO_EEPROM 0xffffffff
DECLARE_GLOBAL_DATA_PTR;
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;
/*
* Routine: board_init
* Description: Early hardware init.
*/
int board_init(void)
{
gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
/* board id for Linux */
gd->bd->bi_arch_number = MACH_TYPE_OMAP3_BEAGLE;
/* boot param addr */
gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
status_led_set (STATUS_LED_BOOT, STATUS_LED_ON);
#endif
return 0;
}
/*
* Routine: get_board_revision
* Description: Detect if we are running on a Beagle revision Ax/Bx,
* C1/2/3, C4 or xM. This can be done by reading
* the level of GPIO173, GPIO172 and GPIO171. This should
* result in
* GPIO173, GPIO172, GPIO171: 1 1 1 => Ax/Bx
* GPIO173, GPIO172, GPIO171: 1 1 0 => C1/2/3
* GPIO173, GPIO172, GPIO171: 1 0 1 => C4
* GPIO173, GPIO172, GPIO171: 0 0 0 => xM
*/
int get_board_revision(void)
{
int revision;
if (!gpio_request(171, "") &&
!gpio_request(172, "") &&
!gpio_request(173, "")) {
gpio_direction_input(171);
gpio_direction_input(172);
gpio_direction_input(173);
revision = gpio_get_value(173) << 2 |
gpio_get_value(172) << 1 |
gpio_get_value(171);
} else {
printf("Error: unable to acquire board revision GPIOs\n");
revision = -1;
}
return revision;
}
/*
* Routine: get_expansion_id
* Description: This function checks for expansion board by checking I2C
* bus 1 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 BEAGLE_NO_EEPROM if eeprom doesn't respond */
if (i2c_probe(EXPANSION_EEPROM_I2C_ADDRESS) == 1) {
i2c_set_bus_num(TWL4030_I2C_BUS);
return BEAGLE_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;
}
/*
* Configure DSS to display background color on DVID
* Configure VENC to display color bar on S-Video
*/
void beagle_display_init(void)
{
omap3_dss_venc_config(&venc_config_std_tv, VENC_HEIGHT, VENC_WIDTH);
switch (get_board_revision()) {
case REVISION_AXBX:
case REVISION_CX:
case REVISION_C4:
omap3_dss_panel_config(&dvid_cfg);
break;
case REVISION_XM_A:
case REVISION_XM_B:
case REVISION_XM_C:
default:
omap3_dss_panel_config(&dvid_cfg_xm);
break;
}
}
/*
* Routine: misc_init_r
* Description: Configure board specific parts
*/
int misc_init_r(void)
{
struct gpio *gpio5_base = (struct gpio *)OMAP34XX_GPIO5_BASE;
struct gpio *gpio6_base = (struct gpio *)OMAP34XX_GPIO6_BASE;
struct control_prog_io *prog_io_base = (struct control_prog_io *)OMAP34XX_CTRL_BASE;
/* Enable i2c2 pullup resisters */
writel(~(PRG_I2C2_PULLUPRESX), &prog_io_base->io1);
switch (get_board_revision()) {
case REVISION_AXBX:
printf("Beagle Rev Ax/Bx\n");
setenv("beaglerev", "AxBx");
break;
case REVISION_CX:
printf("Beagle Rev C1/C2/C3\n");
setenv("beaglerev", "Cx");
MUX_BEAGLE_C();
break;
case REVISION_C4:
printf("Beagle Rev C4\n");
setenv("beaglerev", "C4");
MUX_BEAGLE_C();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
break;
case REVISION_XM_A:
printf("Beagle xM Rev A\n");
setenv("beaglerev", "xMA");
MUX_BEAGLE_XM();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
break;
case REVISION_XM_B:
printf("Beagle xM Rev B\n");
setenv("beaglerev", "xMB");
MUX_BEAGLE_XM();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
break;
case REVISION_XM_C:
printf("Beagle xM Rev C\n");
setenv("beaglerev", "xMC");
MUX_BEAGLE_XM();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
break;
default:
printf("Beagle unknown 0x%02x\n", get_board_revision());
MUX_BEAGLE_XM();
/* Set VAUX2 to 1.8V for EHCI PHY */
twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
TWL4030_PM_RECEIVER_DEV_GRP_P1);
}
switch (get_expansion_id()) {
case TINCANTOOLS_ZIPPY:
printf("Recognized Tincantools Zippy board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
MUX_TINCANTOOLS_ZIPPY();
setenv("buddy", "zippy");
break;
case TINCANTOOLS_ZIPPY2:
printf("Recognized Tincantools Zippy2 board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
MUX_TINCANTOOLS_ZIPPY();
setenv("buddy", "zippy2");
break;
case TINCANTOOLS_TRAINER:
printf("Recognized Tincantools Trainer board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
MUX_TINCANTOOLS_ZIPPY();
MUX_TINCANTOOLS_TRAINER();
setenv("buddy", "trainer");
break;
case TINCANTOOLS_SHOWDOG:
printf("Recognized Tincantools Showdow board (rev %d %s)\n",
expansion_config.revision,
expansion_config.fab_revision);
/* Place holder for DSS2 definition for showdog lcd */
setenv("defaultdisplay", "showdoglcd");
setenv("buddy", "showdog");
break;
case KBADC_BEAGLEFPGA:
printf("Recognized KBADC Beagle FPGA board\n");
MUX_KBADC_BEAGLEFPGA();
setenv("buddy", "beaglefpga");
break;
case LW_BEAGLETOUCH:
printf("Recognized Liquidware BeagleTouch board\n");
setenv("buddy", "beagletouch");
break;
case BRAINMUX_LCDOG:
printf("Recognized Brainmux LCDog board\n");
setenv("buddy", "lcdog");
break;
case BRAINMUX_LCDOGTOUCH:
printf("Recognized Brainmux LCDog Touch board\n");
setenv("buddy", "lcdogtouch");
break;
case BBTOYS_WIFI:
printf("Recognized BeagleBoardToys WiFi board\n");
MUX_BBTOYS_WIFI()
setenv("buddy", "bbtoys-wifi");
break;;
case BBTOYS_VGA:
printf("Recognized BeagleBoardToys VGA board\n");
break;;
case BBTOYS_LCD:
printf("Recognized BeagleBoardToys LCD board\n");
break;;
case BEAGLE_NO_EEPROM:
printf("No EEPROM on expansion board\n");
setenv("buddy", "none");
break;
default:
printf("Unrecognized expansion board: %x\n",
expansion_config.device_vendor);
setenv("buddy", "unknown");
}
if (expansion_config.content == 1)
setenv(expansion_config.env_var, expansion_config.env_setting);
twl4030_power_init();
switch (get_board_revision()) {
case REVISION_XM_A:
case REVISION_XM_B:
twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
break;
default:
twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
break;
}
/* Set GPIO states before they are made outputs */
writel(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1,
&gpio6_base->setdataout);
writel(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12, &gpio5_base->setdataout);
/* Configure GPIOs to output */
writel(~(GPIO23 | GPIO10 | GPIO8 | GPIO2 | GPIO1), &gpio6_base->oe);
writel(~(GPIO31 | GPIO30 | GPIO29 | GPIO28 | GPIO22 | GPIO21 |
GPIO15 | GPIO14 | GPIO13 | GPIO12), &gpio5_base->oe);
dieid_num_r();
beagle_display_init();
omap3_dss_enable();
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_BEAGLE();
}
#ifdef CONFIG_GENERIC_MMC
int board_mmc_init(bd_t *bis)
{
omap_mmc_init(0);
return 0;
}
#endif
#ifdef CONFIG_USB_EHCI
#define GPIO_PHY_RESET 147
/* Reset is needed otherwise the kernel-driver will throw an error. */
int ehci_hcd_stop(void)
{
pr_debug("Resetting OMAP3 EHCI\n");
gpio_set_value(GPIO_PHY_RESET, 0);
writel(OMAP_UHH_SYSCONFIG_SOFTRESET, OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
/* disable USB clocks */
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
sr32(&prcm_base->iclken_usbhost, 0, 1, 0);
sr32(&prcm_base->fclken_usbhost, 0, 2, 0);
sr32(&prcm_base->iclken3_core, 2, 1, 0);
sr32(&prcm_base->fclken3_core, 2, 1, 0);
return 0;
}
/* Call usb_stop() before starting the kernel */
void show_boot_progress(int val)
{
if(val == 15)
usb_stop();
}
/*
* Initialize the OMAP3 EHCI controller and PHY on the BeagleBoard.
* Based on "drivers/usb/host/ehci-omap.c" from Linux 2.6.37.
* See there for additional Copyrights.
*/
int ehci_hcd_init(void)
{
pr_debug("Initializing OMAP3 ECHI\n");
/* Put the PHY in RESET */
gpio_request(GPIO_PHY_RESET, "");
gpio_direction_output(GPIO_PHY_RESET, 0);
gpio_set_value(GPIO_PHY_RESET, 0);
/* Hold the PHY in RESET for enough time till DIR is high */
/* Refer: ISSUE1 */
udelay(10);
struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
/* Enable USBHOST_L3_ICLK (USBHOST_MICLK) */
sr32(&prcm_base->iclken_usbhost, 0, 1, 1);
/*
* Enable USBHOST_48M_FCLK (USBHOST_FCLK1)
* and USBHOST_120M_FCLK (USBHOST_FCLK2)
*/
sr32(&prcm_base->fclken_usbhost, 0, 2, 3);
/* Enable USBTTL_ICLK */
sr32(&prcm_base->iclken3_core, 2, 1, 1);
/* Enable USBTTL_FCLK */
sr32(&prcm_base->fclken3_core, 2, 1, 1);
pr_debug("USB clocks enabled\n");
/* perform TLL soft reset, and wait until reset is complete */
writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET,
OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
/* Wait for TLL reset to complete */
while (!(readl(OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSSTATUS)
& OMAP_USBTLL_SYSSTATUS_RESETDONE));
pr_debug("TLL reset done\n");
writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
OMAP_USBTLL_SYSCONFIG_CACTIVITY,
OMAP3_USBTLL_BASE + OMAP_USBTLL_SYSCONFIG);
/* Put UHH in NoIdle/NoStandby mode */
writel(OMAP_UHH_SYSCONFIG_ENAWAKEUP
| OMAP_UHH_SYSCONFIG_SIDLEMODE
| OMAP_UHH_SYSCONFIG_CACTIVITY
| OMAP_UHH_SYSCONFIG_MIDLEMODE,
OMAP3_UHH_BASE + OMAP_UHH_SYSCONFIG);
/* setup burst configurations */
writel(OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN
| OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN
| OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN,
OMAP3_UHH_BASE + OMAP_UHH_HOSTCONFIG);
/*
* Refer ISSUE1:
* Hold the PHY in RESET for enough time till
* PHY is settled and ready
*/
udelay(10);
gpio_set_value(GPIO_PHY_RESET, 1);
hccr = (struct ehci_hccr *)(OMAP3_EHCI_BASE);
hcor = (struct ehci_hcor *)(OMAP3_EHCI_BASE + 0x10);
pr_debug("OMAP3 EHCI init done\n");
return 0;
}
#endif /* CONFIG_USB_EHCI */
/*
* This command returns the status of the user button on beagle xM
* Input - none
* Returns - 1 if button is held down
* 0 if button is not held down
*/
int do_userbutton(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
int button = 0;
int gpio;
/*
* pass address parameter as argv[0] (aka command name),
* and all remaining args
*/
switch (get_board_revision()) {
case REVISION_AXBX:
case REVISION_CX:
case REVISION_C4:
gpio = 7;
break;
case REVISION_XM_A:
case REVISION_XM_B:
case REVISION_XM_C:
default:
gpio = 4;
break;
}
gpio_request(gpio, "");
gpio_direction_input(gpio);
printf("The user button is currently ");
if (gpio_get_value(gpio))
{
button = 1;
printf("PRESSED.\n");
}
else
{
button = 0;
printf("NOT pressed.\n");
}
return !button;
}
/* -------------------------------------------------------------------- */
U_BOOT_CMD(
userbutton, CONFIG_SYS_MAXARGS, 1, do_userbutton,
"Return the status of the BeagleBoard USER button",
""
);