text: /*
   * 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>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  #include <common.h>
  #include <dm.h>
  #include <ns16550.h>
  #include <netdev.h>
  #include <twl4030.h>
  #include <linux/mtd/nand.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 "overo.h"
  
  #ifdef CONFIG_USB_EHCI
  #include <usb.h>
  #include <asm/ehci-omap.h>
  #endif
  
  DECLARE_GLOBAL_DATA_PTR;
  
  #define TWL4030_I2C_BUS			0
  #define EXPANSION_EEPROM_I2C_BUS	2
  #define EXPANSION_EEPROM_I2C_ADDRESS	0x51
  
  #define GUMSTIX_EMPTY_EEPROM		0x0
  
  #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 GUMSTIX_ALTO35			0x09000200
  #define GUMSTIX_STAGECOACH		0x0A000200
  #define GUMSTIX_THUMBO			0x0B000200
  #define GUMSTIX_TURTLECORE		0x0C000200
  #define GUMSTIX_ARBOR43C		0x0D000200
  
  #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 = {0x0};
  
  static const struct ns16550_platdata overo_serial = {
  	OMAP34XX_UART3,
  	2,
  	V_NS16550_CLK
  };
  
  U_BOOT_DEVICE(overo_uart) = {
  	"serial_omap",
  	&overo_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_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;
  
  #ifdef CONFIG_SYS_I2C_OMAP34XX
  	unsigned char data;
  
  	/* board revisions <= R2410 connect 4030 irq_1 to gpio112             */
  	/* these boards should return a revision number of 0                  */
  	/* the code below forces a 4030 RTC irq to ensure that gpio112 is low */
  	i2c_set_bus_num(TWL4030_I2C_BUS);
  	data = 0x01;
  	i2c_write(0x4B, 0x29, 1, &data, 1);
  	data = 0x0c;
  	i2c_write(0x4B, 0x2b, 1, &data, 1);
  	i2c_read(0x4B, 0x2a, 1, &data, 1);
  #endif
  
  	if (!gpio_request(112, "") &&
  	    !gpio_request(113, "") &&
  	    !gpio_request(115, "")) {
  
  		gpio_direction_input(112);
  		gpio_direction_input(113);
  		gpio_direction_input(115);
  
  		revision = gpio_get_value(115) << 2 |
  			   gpio_get_value(113) << 1 |
  			   gpio_get_value(112);
  	} else {
  		puts("Error: unable to acquire board revision GPIOs\n");
  		revision = -1;
  	}
  
  	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)
  {
  	timings->mr = MICRON_V_MR_165;
  	switch (get_board_revision()) {
  	case REVISION_0: /* Micron 1286MB/256MB, 1/2 banks of 128MB */
  		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;
  	case REVISION_1: /* Micron 256MB/512MB, 1/2 banks of 256MB */
  	case REVISION_4:
  		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_2: /* Hynix 256MB/512MB, 1/2 banks of 256MB */
  		timings->mcfg = HYNIX_V_MCFG_200(256 << 20);
  		timings->ctrla = HYNIX_V_ACTIMA_200;
  		timings->ctrlb = HYNIX_V_ACTIMB_200;
  		timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
  		break;
  	case REVISION_3: /* Micron 512MB/1024MB, 1/2 banks of 512MB */
  		timings->mcfg = MCFG(512 << 20, 15);
  		timings->ctrla = MICRON_V_ACTIMA_200;
  		timings->ctrlb = MICRON_V_ACTIMB_200;
  		timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_200MHz;
  		break;
  	default:
  		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_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 (!gpio_request(130, "") && !gpio_request(139, "")) {
  
  		gpio_direction_output(130, 0);
  		gpio_direction_input(139);
  
  		sdio_direct = 1;
  		gpio_set_value(130, 0);
  		if (gpio_get_value(139) == 0) {
  			gpio_set_value(130, 1);
  			if (gpio_get_value(139) == 1)
  				sdio_direct = 0;
  		}
  
  		gpio_direction_input(130);
  	} else {
  		puts("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)
  {
  	if (expansion_config.device_vendor != 0x0)
  		return expansion_config.device_vendor;
  
  	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)
  {
  	unsigned int expansion_id;
  
  	twl4030_power_init();
  	twl4030_led_init(TWL4030_LED_LEDEN_LEDAON | TWL4030_LED_LEDEN_LEDBON);
  
  	printf("Board revision: %d\n", get_board_revision());
  
  	switch (get_sdio2_config()) {
  	case 0:
  		puts("Tranceiver detected on mmc2\n");
  		MUX_OVERO_SDIO2_TRANSCEIVER();
  		break;
  	case 1:
  		puts("Direct connection on mmc2\n");
  		MUX_OVERO_SDIO2_DIRECT();
  		break;
  	default:
  		puts("Unable to detect mmc2 connection type\n");
  	}
  
  	expansion_id = get_expansion_id();
  	switch (expansion_id) {
  	case GUMSTIX_SUMMIT:
  		printf("Recognized Summit expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "dvi");
  		setenv("expansionname", "summit");
  		break;
  	case GUMSTIX_TOBI:
  		printf("Recognized Tobi expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "dvi");
  		setenv("expansionname", "tobi");
  		break;
  	case GUMSTIX_TOBI_DUO:
  		printf("Recognized Tobi Duo expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		break;
  	case GUMSTIX_PALO35:
  		printf("Recognized Palo35 expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "lcd35");
  		break;
  	case GUMSTIX_PALO43:
  		printf("Recognized Palo43 expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "lcd43");
  		setenv("expansionname", "palo43");
  		break;
  	case GUMSTIX_CHESTNUT43:
  		printf("Recognized Chestnut43 expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "lcd43");
  		setenv("expansionname", "chestnut43");
  		break;
  	case GUMSTIX_PINTO:
  		printf("Recognized Pinto expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		break;
  	case GUMSTIX_GALLOP43:
  		printf("Recognized Gallop43 expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		setenv("defaultdisplay", "lcd43");
  		setenv("expansionname", "gallop43");
  		break;
  	case GUMSTIX_ALTO35:
  		printf("Recognized Alto35 expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		MUX_ALTO35();
  		setenv("defaultdisplay", "lcd35");
  		setenv("expansionname", "alto35");
  		break;
  	case GUMSTIX_STAGECOACH:
  		printf("Recognized Stagecoach expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		break;
  	case GUMSTIX_THUMBO:
  		printf("Recognized Thumbo expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		break;
  	case GUMSTIX_TURTLECORE:
  		printf("Recognized Turtlecore expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		break;
  	case GUMSTIX_ARBOR43C:
  		printf("Recognized Arbor43C expansion board (rev %d %s)\n",
  			expansion_config.revision,
  			expansion_config.fab_revision);
  		MUX_GUMSTIX();
  		MUX_ARBOR43C();
  		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_GUMSTIX();
  		MUX_USRP_E();
  		setenv("defaultdisplay", "dvi");
  		break;
  	case GUMSTIX_NO_EEPROM:
  	case GUMSTIX_EMPTY_EEPROM:
  		puts("No or empty EEPROM on expansion board\n");
  		MUX_GUMSTIX();
  		setenv("expansionname", "tobi");
  		break;
  	default:
  		printf("Unrecognized expansion board 0x%08x\n", expansion_id);
  		break;
  	}
  
  	if (expansion_config.content == 1)
  		setenv(expansion_config.env_var, expansion_config.env_setting);
  
  	dieid_num_r();
  
  	if (get_cpu_family() == CPU_OMAP34XX)
  		setenv("boardname", "overo");
  	else
  		setenv("boardname", "overo-storm");
  
  	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) && !defined(CONFIG_SPL_BUILD)
  /* 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: 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;
  
  	/* 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);
  }
  
  /*
   * Routine: reset_net_chip
   * Description: Reset the Ethernet hardware.
   */
  static void reset_net_chip(void)
  {
  	/* Make GPIO 64 as output pin and send a magic pulse through it */
  	if (!gpio_request(64, "")) {
  		gpio_direction_output(64, 0);
  		gpio_set_value(64, 1);
  		udelay(1);
  		gpio_set_value(64, 0);
  		udelay(1);
  		gpio_set_value(64, 1);
  	}
  }
  
  int board_eth_init(bd_t *bis)
  {
  	unsigned int expansion_id;
  	int rc = 0;
  
  #ifdef CONFIG_SMC911X
  	expansion_id = get_expansion_id();
  	switch (expansion_id) {
  	case GUMSTIX_TOBI_DUO:
  		/* second lan chip */
  		enable_gpmc_cs_config(gpmc_lan_config, &gpmc_cfg->cs[4],
  				      0x2B000000, GPMC_SIZE_16M);
  		/* no break */
  	case GUMSTIX_TOBI:
  	case GUMSTIX_CHESTNUT43:
  	case GUMSTIX_STAGECOACH:
  	case GUMSTIX_NO_EEPROM:
  	case GUMSTIX_EMPTY_EEPROM:
  		/* first lan chip */
  		enable_gpmc_cs_config(gpmc_lan_config, &gpmc_cfg->cs[5],
  				      0x2C000000, GPMC_SIZE_16M);
  
  		setup_net_chip();
  		reset_net_chip();
  
  		rc = smc911x_initialize(0, CONFIG_SMC911X_BASE);
  		break;
  	default:
  		break;
  	}
  #endif
  
  	return rc;
  }
  #endif
  
  #if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
  int board_mmc_init(bd_t *bis)
  {
  	return omap_mmc_init(0, 0, 0, -1, -1);
  }
  #endif
  
  #if defined(CONFIG_GENERIC_MMC)
  void board_mmc_power_init(void)
  {
  	twl4030_power_mmc_init(0);
  }
  #endif
  
  #if defined(CONFIG_USB_EHCI) &&  !defined(CONFIG_SPL_BUILD)
  static struct omap_usbhs_board_data usbhs_bdata = {
  	.port_mode[0] = OMAP_USBHS_PORT_MODE_UNUSED,
  	.port_mode[1] = OMAP_EHCI_PORT_MODE_PHY,
  	.port_mode[2] = OMAP_USBHS_PORT_MODE_UNUSED
  };
  
  #define GUMSTIX_GPIO_USBH_CPEN		168
  int ehci_hcd_init(int index, enum usb_init_type init,
  		  struct ehci_hccr **hccr, struct ehci_hcor **hcor)
  {
  	/* Enable USB power */
  	if (!gpio_request(GUMSTIX_GPIO_USBH_CPEN, "usbh_cpen"))
  		gpio_direction_output(GUMSTIX_GPIO_USBH_CPEN, 1);
  
  	return omap_ehci_hcd_init(index, &usbhs_bdata, hccr, hcor);
  }
  
  int ehci_hcd_stop(void)
  {
  	/* Disable USB power */
  	gpio_set_value(GUMSTIX_GPIO_USBH_CPEN, 0);
  	gpio_free(GUMSTIX_GPIO_USBH_CPEN);
  
  	return omap_ehci_hcd_stop();
  }
  
  #endif /* CONFIG_USB_EHCI */
  