board/ti/beagle/beagle.c

/*
 * (C) Copyright 2004-2011
 * 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>
 *
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#include <common.h>
#include <dm.h>
#include <ns16550.h>
#ifdef CONFIG_LED_STATUS
#include <status_led.h>
#endif
#include <twl4030.h>
#include <linux/mtd/rawnand.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/gpio.h>
#include <asm/mach-types.h>
#include <asm/omap_musb.h>
#include <linux/errno.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <linux/usb/musb.h>
#include "beagle.h"
#include <command.h>

#ifdef CONFIG_USB_EHCI_HCD
#include <usb.h>
#include <asm/ehci-omap.h>
#endif

#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 BCT_BRETTL3			0x01000F00
#define BCT_BRETTL4			0x02000F00
#define LSR_COM6L_ADPT			0x01001300
#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;

static const struct ns16550_platdata beagle_serial = {
	.base = OMAP34XX_UART3,
	.reg_shift = 2,
	.clock = V_NS16550_CLK,
	.fcr = UART_FCR_DEFVAL,
};

U_BOOT_DEVICE(beagle_uart) = {
	"ns16550_serial",
	&beagle_serial
};

/*
 * 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_LED_STATUS) && defined(CONFIG_LED_STATUS_BOOT_ENABLE)
	status_led_set(CONFIG_LED_STATUS_BOOT, CONFIG_LED_STATUS_ON);
#endif

	return 0;
}

#if defined(CONFIG_SPL_OS_BOOT)
int spl_start_uboot(void)
{
	/* break into full u-boot on 'c' */
	if (serial_tstc() && serial_getc() == 'c')
		return 1;

	return 0;
}
#endif /* CONFIG_SPL_OS_BOOT */

/*
 * Routine: get_board_revision
 * Description: Detect if we are running on a Beagle revision Ax/Bx,
 *		C1/2/3, C4, xM Ax/Bx or xM Cx. 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 1 0 => xM Cx
 *		GPIO173, GPIO172, GPIO171: 0 0 0 => xM Ax/Bx
 */
static int get_board_revision(void)
{
	static int revision = -1;

	if (revision == -1) {
		if (!gpio_request(171, "rev0") &&
		    !gpio_request(172, "rev1") &&
		    !gpio_request(173, "rev2")) {
			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");
		}
	}

	return revision;
}

#ifdef CONFIG_SPL_BUILD
/*
 * Routine: get_board_mem_timings
 * Description: If we use SPL then there is no x-loader nor config header
 * so we have to setup the DDR timings ourself on both banks.
 */
void get_board_mem_timings(struct board_sdrc_timings *timings)
{
	int pop_mfr, pop_id;

	/*
	 * We need to identify what PoP memory is on the board so that
	 * we know what timings to use.  If we can't identify it then
	 * we know it's an xM.  To map the ID values please see nand_ids.c
	 */
	identify_nand_chip(&pop_mfr, &pop_id);

	timings->mr = MICRON_V_MR_165;
	switch (get_board_revision()) {
	case REVISION_C4:
		if (pop_mfr == NAND_MFR_STMICRO && pop_id == 0xba) {
			/* 512MB DDR */
			timings->mcfg = NUMONYX_V_MCFG_165(512 << 20);
			timings->ctrla = NUMONYX_V_ACTIMA_165;
			timings->ctrlb = NUMONYX_V_ACTIMB_165;
			timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
			break;
		} else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xba) {
			/* Beagleboard Rev C4, 512MB Nand/256MB DDR*/
			timings->mcfg = MICRON_V_MCFG_165(128 << 20);
			timings->ctrla = MICRON_V_ACTIMA_165;
			timings->ctrlb = MICRON_V_ACTIMB_165;
			timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
			break;
		} else if (pop_mfr == NAND_MFR_MICRON && pop_id == 0xbc) {
			/* Beagleboard Rev C5, 256MB DDR */
			timings->mcfg = MICRON_V_MCFG_200(256 << 20);
			timings->ctrla = MICRON_V_ACTIMA_200;
			timings->ctrlb = MICRON_V_ACTIMB_200;
			timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
			break;
		}
	case REVISION_XM_AB:
	case REVISION_XM_C:
		if (pop_mfr == 0) {
			/* 256MB DDR */
			timings->mcfg = MICRON_V_MCFG_200(256 << 20);
			timings->ctrla = MICRON_V_ACTIMA_200;
			timings->ctrlb = MICRON_V_ACTIMB_200;
			timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
		} else {
			/* 512MB DDR */
			timings->mcfg = NUMONYX_V_MCFG_165(512 << 20);
			timings->ctrla = NUMONYX_V_ACTIMA_165;
			timings->ctrlb = NUMONYX_V_ACTIMB_165;
			timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
		}
		break;
	default:
		/* Assume 128MB and Micron/165MHz timings to be safe */
		timings->mcfg = MICRON_V_MCFG_165(128 << 20);
		timings->ctrla = MICRON_V_ACTIMA_165;
		timings->ctrlb = MICRON_V_ACTIMB_165;
		timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
	}
}
#endif

/*
 * 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
 */
static 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));

	/* retry reading configuration data with 16bit addressing */
	if ((expansion_config.device_vendor == 0xFFFFFF00) ||
	    (expansion_config.device_vendor == 0xFFFFFFFF)) {
		printf("EEPROM is blank or 8bit addressing failed: retrying with 16bit:\n");
		i2c_read(EXPANSION_EEPROM_I2C_ADDRESS, 0, 2, (u8 *)&expansion_config,
			 sizeof(expansion_config));
	}

	i2c_set_bus_num(TWL4030_I2C_BUS);

	return expansion_config.device_vendor;
}

#ifdef CONFIG_VIDEO_OMAP3
/*
 * Configure DSS to display background color on DVID
 * Configure VENC to display color bar on S-Video
 */
static 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_AB:
	case REVISION_XM_C:
	default:
		omap3_dss_panel_config(&dvid_cfg_xm);
		break;
	}
}

/*
 * Enable DVI power
 */
static void beagle_dvi_pup(void)
{
	uchar val;

	switch (get_board_revision()) {
	case REVISION_AXBX:
	case REVISION_CX:
	case REVISION_C4:
		gpio_request(170, "dvi");
		gpio_direction_output(170, 0);
		gpio_set_value(170, 1);
		break;
	case REVISION_XM_AB:
	case REVISION_XM_C:
	default:
		#define GPIODATADIR1 (TWL4030_BASEADD_GPIO+3)
		#define GPIODATAOUT1 (TWL4030_BASEADD_GPIO+6)

		i2c_read(TWL4030_CHIP_GPIO, GPIODATADIR1, 1, &val, 1);
		val |= 4;
		i2c_write(TWL4030_CHIP_GPIO, GPIODATADIR1, 1, &val, 1);

		i2c_read(TWL4030_CHIP_GPIO, GPIODATAOUT1, 1, &val, 1);
		val |= 4;
		i2c_write(TWL4030_CHIP_GPIO, GPIODATAOUT1, 1, &val, 1);
		break;
	}
}
#endif

#ifdef CONFIG_USB_MUSB_OMAP2PLUS
static struct musb_hdrc_config musb_config = {
	.multipoint     = 1,
	.dyn_fifo       = 1,
	.num_eps        = 16,
	.ram_bits       = 12,
};

static struct omap_musb_board_data musb_board_data = {
	.interface_type	= MUSB_INTERFACE_ULPI,
};

static struct musb_hdrc_platform_data musb_plat = {
#if defined(CONFIG_USB_MUSB_HOST)
	.mode           = MUSB_HOST,
#elif defined(CONFIG_USB_MUSB_GADGET)
	.mode		= MUSB_PERIPHERAL,
#else
#error "Please define either CONFIG_USB_MUSB_HOST or CONFIG_USB_MUSB_GADGET"
#endif
	.config         = &musb_config,
	.power          = 100,
	.platform_ops	= &omap2430_ops,
	.board_data	= &musb_board_data,
};
#endif

/*
 * 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;
	bool generate_fake_mac = false;
	u32 value;

	/* Enable i2c2 pullup resisters */
	value = readl(&prog_io_base->io1);
	value &= ~(PRG_I2C2_PULLUPRESX);
	writel(value, &prog_io_base->io1);

	switch (get_board_revision()) {
	case REVISION_AXBX:
		printf("Beagle Rev Ax/Bx\n");
		env_set("beaglerev", "AxBx");
		break;
	case REVISION_CX:
		printf("Beagle Rev C1/C2/C3\n");
		env_set("beaglerev", "Cx");
		MUX_BEAGLE_C();
		break;
	case REVISION_C4:
		printf("Beagle Rev C4\n");
		env_set("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_AB:
		printf("Beagle xM Rev A/B\n");
		env_set("beaglerev", "xMAB");
		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);
		generate_fake_mac = true;
		break;
	case REVISION_XM_C:
		printf("Beagle xM Rev C\n");
		env_set("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);
		generate_fake_mac = true;
		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);
		generate_fake_mac = true;
	}

	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();
		env_set("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();
		env_set("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();
		env_set("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 */
		env_set("defaultdisplay", "showdoglcd");
		env_set("buddy", "showdog");
		break;
	case KBADC_BEAGLEFPGA:
		printf("Recognized KBADC Beagle FPGA board\n");
		MUX_KBADC_BEAGLEFPGA();
		env_set("buddy", "beaglefpga");
		break;
	case LW_BEAGLETOUCH:
		printf("Recognized Liquidware BeagleTouch board\n");
		env_set("buddy", "beagletouch");
		break;
	case BRAINMUX_LCDOG:
		printf("Recognized Brainmux LCDog board\n");
		env_set("buddy", "lcdog");
		break;
	case BRAINMUX_LCDOGTOUCH:
		printf("Recognized Brainmux LCDog Touch board\n");
		env_set("buddy", "lcdogtouch");
		break;
	case BBTOYS_WIFI:
		printf("Recognized BeagleBoardToys WiFi board\n");
		MUX_BBTOYS_WIFI()
		env_set("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 BCT_BRETTL3:
		printf("Recognized bct electronic GmbH brettl3 board\n");
		break;
	case BCT_BRETTL4:
		printf("Recognized bct electronic GmbH brettl4 board\n");
		break;
	case LSR_COM6L_ADPT:
		printf("Recognized LSR COM6L Adapter Board\n");
		MUX_BBTOYS_WIFI()
		env_set("buddy", "lsr-com6l-adpt");
		break;
	case BEAGLE_NO_EEPROM:
		printf("No EEPROM on expansion board\n");
		env_set("buddy", "none");
		break;
	default:
		printf("Unrecognized expansion board: %x\n",
			expansion_config.device_vendor);
		env_set("buddy", "unknown");
	}

	if (expansion_config.content == 1)
		env_set(expansion_config.env_var, expansion_config.env_setting);

	twl4030_power_init();
	switch (get_board_revision()) {
	case REVISION_XM_AB:
		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);

	omap_die_id_display();

#ifdef CONFIG_VIDEO_OMAP3
	beagle_dvi_pup();
	beagle_display_init();
	omap3_dss_enable();
#endif

#ifdef CONFIG_USB_MUSB_OMAP2PLUS
	musb_register(&musb_plat, &musb_board_data, (void *)MUSB_BASE);
#endif

	if (generate_fake_mac)
		omap_die_id_usbethaddr();

#if defined(CONFIG_MTDIDS_DEFAULT) && defined(CONFIG_MTDPARTS_DEFAULT)
	if (strlen(CONFIG_MTDIDS_DEFAULT))
		env_set("mtdids", CONFIG_MTDIDS_DEFAULT);

	if (strlen(CONFIG_MTDPARTS_DEFAULT))
		env_set("mtdparts", CONFIG_MTDPARTS_DEFAULT);
#endif

	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();
}

#if defined(CONFIG_MMC)
int board_mmc_init(bd_t *bis)
{
	return omap_mmc_init(0, 0, 0, -1, -1);
}
#endif

#if defined(CONFIG_MMC)
void board_mmc_power_init(void)
{
	twl4030_power_mmc_init(0);
}
#endif

#if defined(CONFIG_USB_EHCI_HCD) && !defined(CONFIG_SPL_BUILD)
/* Call usb_stop() before starting the kernel */
void show_boot_progress(int val)
{
	if (val == BOOTSTAGE_ID_RUN_OS)
		usb_stop();
}

static struct omap_usbhs_board_data usbhs_bdata = {
	.port_mode[0] = OMAP_EHCI_PORT_MODE_PHY,
	.port_mode[1] = OMAP_EHCI_PORT_MODE_PHY,
	.port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED
};

int ehci_hcd_init(int index, enum usb_init_type init,
		struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
	return omap_ehci_hcd_init(index, &usbhs_bdata, hccr, hcor);
}

int ehci_hcd_stop(int index)
{
	return omap_ehci_hcd_stop();
}

#endif /* CONFIG_USB_EHCI_HCD */

#if defined(CONFIG_USB_ETHER) && defined(CONFIG_USB_MUSB_GADGET)
int board_eth_init(bd_t *bis)
{
	return usb_eth_initialize(bis);
}
#endif