arch/arm/boards/optimus/optimus.c

/*
 * Copyright (C) 2011 Mindspeed Technologies Pvt Ltd.
 *
 * 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
 *
 */

/**
 * @file
 * @brief Comcerto 2000 Specific Board Initialization routines
 *
 */


#include <common.h>
#include <init.h>
#include <driver.h>
#include <partition.h>
#include <fs.h>
#include <asm/io.h>
#include <asm/types.h>
#include <asm/hardware.h>
#include <mach/comcerto-2000.h>
#include <mach/exp-bus.h>
#include <generated/mach-types.h>
#include <sizes.h>
#include <c2000_eth_pdata.h>
#include <config.h>
#include <spi/spi.h>
#include <mach/comcerto_spi.h>
#include <mach/gpio.h>
#include <miidev.h>
#include <asm/armlinux.h>
#include <fast_uart.h>
#include <i2c/i2c.h>
#include <mach/i2c.h>
#include <mach/otp.h>
#include <mach/ddr.h>
#include "optimus.h"

#define PHY_DEVICE      "phy0"

#define OPTIMUS_BOARD_ID		0
#define SIDESWIPE_BOARD_ID		1
#define SPACECAST_BOARD_ID		2
#define SPACECAST_EMAC1_PHY_ADDR	1

#ifdef CONFIG_SPI
//Legacy spi

static int c2k_spi_cs[4] = {0};

static struct c2k_spi_master c2k_spi_1_data = {
        .chipselect = c2k_spi_cs,
        .num_chipselect = ARRAY_SIZE(c2k_spi_cs),
};

static struct spi_board_info c2k_spi_dev_1[] = {
        {
                .name = "S25FL064A", /* device name */
                .max_speed_hz = 4000000, /* max freq this device can work with */
                .bus_num = 0, /* which driver to attach this device to */
                .chip_select = 0, /* which chip select this device is connected to */
                .mode = SPI_CPOL | SPI_CPHA, /* operating modes */
        },
        {
                .name = "comcerto_spi1", /* device name */
                .max_speed_hz = 4000000, /* max freq this device can work with */
                .bus_num = 0, /* which driver to attach this device to */
                .chip_select = 1, /* which chip select this device is connected to */
                .mode = SPI_CPOL | SPI_CPHA, /* operating modes */
        },
        {
                .name = "comcerto_spi2", /* device name */
                .max_speed_hz = 4000000, /* max freq this device can work with */
                .bus_num = 0, /* which driver to attach this device to */
                .chip_select = 2, /* which chip select this device is connected to */
                .mode = SPI_CPOL | SPI_CPHA, /* operating modes */
        },
        {
                .name = "legerity", /* device name */
                .max_speed_hz = 4000000, /* max freq this device can work with */
                .bus_num = 0, /* which driver to attach this device to */
                .chip_select = 3, /* which chip select this device is connected to */
                .mode = SPI_CPOL | SPI_CPHA, /* operating modes */
        },
};

static struct device_d device_spi = {
        .id = -1,
        .name = "c2k_spi",
        .map_base = SPI_BASEADDR,
        .platform_data = &c2k_spi_1_data,
};
#endif


#if defined(CONFIG_NET_COMCERTO_2000)
struct c2000_eth_platform_data eth0_pdata = {
	.gemac_port = 0,
	.mac_addr = 0,
	.phy_addr = EMAC0_PHY_ADDR,
};

struct device_d c2000_eth0 = {
	.id = 0,
	.name = "c2000_eth",
	.map_base = COMCERTO_AXI_HFE_CFG_BASE,
	/* .size  = 16M, */
	.platform_data = &eth0_pdata,
};

struct c2000_eth_platform_data eth1_pdata = {
	.gemac_port = 1,
	.mac_addr = 0,
	.phy_addr = EMAC1_PHY_ADDR,
};

struct device_d c2000_eth1 = {
	.id = 1,
	.name = "c2000_eth",
	.map_base = COMCERTO_AXI_HFE_CFG_BASE,
	/* .size  = 16M, */
	.platform_data = &eth1_pdata,
};

struct c2000_eth_platform_data eth2_pdata = {
	.gemac_port = 2,
	.mac_addr = 0,
	.phy_addr = 0,
};

struct device_d c2000_eth2 = {
	.id = 2,
	.name = "c2000_eth",
	.map_base = COMCERTO_AXI_HFE_CFG_BASE,
	/* .size  = 16M, */
	.platform_data = &eth2_pdata,
};
#endif

static struct memory_platform_data sdram_pdata = {
	.name = "ram0",
	.flags = DEVFS_RDWR,
};

static struct device_d sdram_dev = {
	.id = -1,
	.name = "mem",
	.map_base = 0x00000000,
	.size = 0, /* Will be set in c2000_device_init() depending on h/w
		      strapping. */
	.platform_data = &sdram_pdata,
};

static struct fast_uart_plat serial_plat = {
	.clock = 200000000,      /* 200MHz  */
};

static struct device_d fast_uart_device = {
	.id       = -1,
	.name     = "fast_uart",
	.map_base = UART_BASEADDR,
	.platform_data = (void *)&serial_plat,
};

#ifdef CONFIG_I2C_C2K
struct i2c_platform_data pdata = {
	.bitrate = 0x40000
};

struct device_d c2k_i2c_dev = {
	.id       = -1,
	.name     = "c2k_i2c",
	.map_base = COMCERTO_I2C_BASE,
	.platform_data = &pdata,
};

static struct i2c_board_info i2c_devices[] = {
	{
		I2C_BOARD_INFO("eeprom", CFG_I2C_EEPROM0_ADDR),
	},
};
#endif

#ifdef CONFIG_OTP
struct device_d c2k_otp_dev = {
	.name     = "c2k_otp",
	.map_base = COMCERTO_OTP_BASE,
	.size     = OTP_SIZE,
};
#endif

struct device_d c2k_nor_dev = {
	.id	  = -1,
	.name     = "cfi_flash",
	.map_base = COMCERTO_AXI_EXP_BASE,
	.size     = 0, /* auto-detected by cfi_flash driver */
};

struct device_d csi_flash_dev = {
	.id	  = -1,
	.name     = "csi_flash",
	.size     = SPI_FLASH_SIZE,
};

/* This variable is for debugging purposes. A developer can get its address
 * with "grep optimus_board_id System.map" and then examine it later with "md
 * 0x<address>" from barebox. */
int optimus_board_id = 0x9999999;

int get_board_id(void) {
	int board_id;
	/* We determine the type of board by reading GPIO pins 57, 56 and 55
	 * The bit patterns are defined as follows:
	 * Optimus=000
	 * Sideswipe=001
	 * SpaceCast=010
	*/

	/* We usually set up GPIO pins in c2000_device_init(), but the latter
	 * runs only after this function. */

	/* GPIO[55-57] and CORESIGHT_D[11-13] are muxed on the same pins. Set
	 * pin Select Register to select GPIO[55-57].  Pin Output Register is 0
	 * by default. */
	writel(readl(COMCERTO_GPIO_63_32_PIN_SELECT_REG) | 7<<(55-32), COMCERTO_GPIO_63_32_PIN_SELECT_REG);

	/* Set GPIO[55-57] to input */
	writel(readl(COMCERTO_GPIO_63_32_OE_REG) | 7<<(55-32), COMCERTO_GPIO_63_32_OE_REG);

	/* Read 3 bit board id */
	board_id = (readl(COMCERTO_GPIO_63_32_INPUT_REG) >> (55-32)) & 7;

	optimus_board_id = board_id | 0xabcd0000;

	return board_id;
}
EXPORT_SYMBOL(get_board_id)

static int c2000_device_init(void)
{
#ifdef	CONFIG_COMCERTO_BOOTLOADER
	u32 bootopt;
#endif
	int clk = HAL_get_axi_clk(); // Get AXI bus freq in MHz
	serial_plat.clock = clk * 1000 * 1000;
	register_device(&fast_uart_device);

#ifdef CONFIG_I2C_C2K
	i2c_register_board_info(0, i2c_devices, ARRAY_SIZE(i2c_devices));
	register_device(&c2k_i2c_dev);
#endif

#ifdef CONFIG_SPI
	spi_register_board_info(c2k_spi_dev_1, ARRAY_SIZE(c2k_spi_dev_1));
	register_device(&device_spi);
#endif

#ifdef CONFIG_OTP
	register_device(&c2k_otp_dev);
#endif

#if defined(CONFIG_NET_COMCERTO_2000)
	if (get_board_id() == SPACECAST_BOARD_ID) {
		/* In SpaceCast GEMAC1 is connected to PHY address 0 */
		struct c2000_eth_platform_data *pdata =
						c2000_eth1.platform_data;
		pdata->phy_addr = SPACECAST_EMAC1_PHY_ADDR;
	}
	register_device(&c2000_eth0);
	register_device(&c2000_eth1);
	register_device(&c2000_eth2);
#endif
	register_device(&c2k_nor_dev);
	register_device(&csi_flash_dev);

	//Exp bus soft reset
	writel (0x1, EXP_SWRST_REG);
	while(readl(EXP_SWRST_REG) & 0x1);

	//16-bit NOR bus is used on C2K EVM board
	writel(((0x1) << 1), EXP_CS0_CFG_REG);

	/* IBR, when booting from NOR, is changing expansion bus CS0 Mem Segment size to 1MiB
	instead of the default reset value of 128MiB. Put back the reset default value */
	writel(EXP_CS0_SEG_END_VAL, EXP_CS0_SEG_REG);

	writel(EXP_CS1_BASE_VAL, EXP_CS1_BASE_REG);
	writel(EXP_CS1_SEG_END_VAL, EXP_CS1_SEG_REG);

	writel(EXP_CS2_BASE_VAL, EXP_CS2_BASE_REG);
	writel(EXP_CS2_SEG_END_VAL, EXP_CS2_SEG_REG);

	writel(EXP_CS3_BASE_VAL, EXP_CS3_BASE_REG);
	writel(EXP_CS3_SEG_END_VAL, EXP_CS3_SEG_REG);

#ifdef CONFIG_COMCERTO_NAND
        writel(EXP_CS4_BASE_VAL, EXP_CS4_BASE_REG);
	writel(EXP_CS4_SEG_END_VAL, EXP_CS4_SEG_REG);
	//MLC NAND on EVM is 8-bit. Enable 8-bit bus
        writel((readl(EXP_CS4_CFG_REG) & (~0x6)), EXP_CS4_CFG_REG);

#endif

	//CS0 EXP bus Timing tune. It reduces the time to flash NOR
	writel(0x03034007, EXP_CS0_TMG1_REG);
	writel(0x04040502, EXP_CS0_TMG2_REG);

	//CS4 EXP bus Timing tune. It reduces the time to flash NAND
	writel(0x01010001, EXP_CS4_TMG1_REG);
	writel(0x01010101, EXP_CS4_TMG2_REG);
	writel(0x00000001, EXP_CS4_TMG3_REG);

	/* External reset to PCIe devices, Atheros Switch and FXS block, GPIO27 is used for TM_EXT_RESET*/
	/*It seems some pcie wifi card has problem with the way external reset was being
	  done (reset line high/delay/low/delay/high sequence) earlier. Instead simple
	  reset pulse works for fine for these card and all the cards and it includes atheros
	  switch*/
	writel(readl(COMCERTO_GPIO_OUTPUT_REG) & ~GPIO_27, COMCERTO_GPIO_OUTPUT_REG);
	writel( readl(COMCERTO_GPIO_OE_REG) | GPIO_27, COMCERTO_GPIO_OE_REG);
	writel(readl(COMCERTO_GPIO_OUTPUT_REG) | GPIO_27, COMCERTO_GPIO_OUTPUT_REG);

#ifdef	CONFIG_COMCERTO_ULOADER
	/*
	 * GPIO 12: system blue LED
	 * GPIO 13: system red LED
	 * GPIO 14: AR8337 reset, active low
	 * GPIO 15: USB power switch enable, active high
	 * GPIO 44: Power Over Ethernet, needs to be set low
	 * GPIO 48: Power enable for high power wifi 11AC 4.2V PA, needs to be
	 *          set high
	 */
	comcerto_gpio_enable_output(GPIO_12|GPIO_13);
	/* Turn blue LED off, red LED on, to indicate the uloader is running. */
	comcerto_gpio_set_0(GPIO_12);
	comcerto_gpio_set_1(GPIO_13);

	comcerto_gpio_enable_output(GPIO_14|GPIO_15);
	comcerto_gpio_set_1(GPIO_14|GPIO_15);
	comcerto_gpio_set_0(GPIO_14|GPIO_15);
	/* AR8337 requires 10ms reset pulse. */
	mdelay(10);
	comcerto_gpio_set_1(GPIO_14|GPIO_15);

	/* Misc Pin Select Register[5:4]: TDM interface Muxing
	 * ‘00’ – TDM block is selected (default)
	 * ‘10’ – GPIO[63:60] signals are selected
	 *
	 * For Optimus, we need GPIO[62].
	 */
	writel(readl(COMCERTO_GPIO_MISC_PIN_SELECT_REG) | 2 << 4, COMCERTO_GPIO_MISC_PIN_SELECT_REG);

	/* GPIO[44] and CORESIGHT_D[0] are muxed on the same pin. Set pin
	 * Select Register to select GPIO[44].  Pin Output Register is 0 by
	 * default. */
	writel(readl(COMCERTO_GPIO_63_32_PIN_SELECT_REG) | 1<<(44-32), COMCERTO_GPIO_63_32_PIN_SELECT_REG);
	/* GPIO[48] and CORESIGHT_D[4] are muxed on the same pin. Set pin
	 * Select Register to select GPIO[48]. */
	writel(readl(COMCERTO_GPIO_63_32_PIN_SELECT_REG) | 1<<(48-32), COMCERTO_GPIO_63_32_PIN_SELECT_REG);
	/* Set GPIO[48] to high */
	writel(readl(COMCERTO_GPIO_63_32_OUTPUT_REG) | 1<<(48-32), COMCERTO_GPIO_63_32_OUTPUT_REG);
#endif
#ifdef	CONFIG_COMCERTO_BOOTLOADER
	/* Turn blue LED off, red LED on, to indicate the bootloader is running. */
	comcerto_gpio_set_0(GPIO_12);
	comcerto_gpio_set_1(GPIO_13);
#endif

	sdram_dev.size = get_ddr_config_size();
	if (!sdram_dev.size) {
		printf("Bad DDRC configuration\n");
		hang();
	}
	//For 16bit ddr, reduce the size to half 
	if (is_16bitDDR_config())
		sdram_dev.size >>= 1;
	printf("Memory size: %s\n", size_human_readable(sdram_dev.size));

#ifdef	CONFIG_COMCERTO_BOOTLOADER
	armlinux_add_dram(&sdram_dev);
	armlinux_set_bootparams((void *)0x100);
	armlinux_set_architecture(MACH_TYPE_COMCERTO);

	bootopt = ((readl(COMCERTO_GPIO_SYSTEM_CONFIG) >>  BOOTSTRAP_BOOT_OPT_SHIFT) & BOOTSTRAP_BOOT_OPT_MASK);
	if(!bootopt){
		/* ENV for SPI */
		printf("Using ENV from SPI Flash.\n");
		devfs_add_partition("spi0", 0x120000, 0x20000, PARTITION_FIXED, "env0");
		protect_file("/dev/env0", 1);
	}else{
		/* ENV for NOR */
		printf("Using ENV from NOR Flash.\n");
		devfs_add_partition("nor0", 0x120000, 0x20000, PARTITION_FIXED, "env0");
		protect_file("/dev/env0", 1);
	}
#endif
	return 0;
}

int c2000_eth_board_init(int gemac_port)
{
        struct mii_device *mdev;
        struct cdev *cdev;

        cdev = cdev_by_name(PHY_DEVICE);
	if(!cdev)
	{
		printf("No MII Device registered !!\n");
		return -1;
	}

        mdev = cdev->priv;

        //eth0 port is chosen as criteria for bringingup out of reset because
        //all MDIO access can happen through EMAC0 and without bringing eth0 first
        //no Switch/PHY configuration can happen and no point in removing reset without eth0
	if (get_board_id() != SPACECAST_BOARD_ID) {
		if(gemac_port == 0)
		{
				//AR8327 Switch init
				athrs17_init(mdev);

				//AR8327 WAN PHY4 init
				athrs17_phy_setup(mdev,EMAC0_PHY_ADDR);
		}
		else
		{
			//AR8327 LAN PHYs init
			athrs17_phy_setup(mdev,EMAC1_PHY_ADDR);
		}
	}
	return 0;
}

device_initcall(c2000_device_init);