arch/arm/boards/eukrea_cpuimx35/eukrea_cpuimx35.c

/*
 * Copyright (C) 2007 Sascha Hauer, Pengutronix
 *               2009 Marc Kleine-Budde, Pengutronix
 * (c) 2010 Eukrea Electromatique, Eric Bénard <eric@eukrea.com>
 *
 * 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
 *
 * Derived from:
 *
 * * mx35_3stack.c - board file for uboot-v1
 *   Copyright (C) 2007, Guennadi Liakhovetski <lg@denx.de>
 *   (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
 *
 */

#include <common.h>
#include <command.h>
#include <environment.h>
#include <errno.h>
#include <fcntl.h>
#include <fec.h>
#include <fs.h>
#include <init.h>
#include <nand.h>
#include <net.h>
#include <partition.h>

#include <asm/armlinux.h>
#include <asm/io.h>
#include <generated/mach-types.h>
#include <asm/mmu.h>

#include <mach/gpio.h>
#include <mach/imx-nand.h>
#include <mach/imx-regs.h>
#include <mach/iomux-mx35.h>
#include <mach/iomux-v3.h>
#include <mach/pmic.h>
#include <mach/imx-ipu-fb.h>
#include <mach/imx-pll.h>
#include <i2c/i2c.h>
#include <usb/fsl_usb2.h>
#include <mach/usb.h>
#include <mach/devices-imx35.h>

static struct fec_platform_data fec_info = {
	.xcv_type	= MII100,
	.phy_addr	= 0x1F,
};

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

static struct device_d sdram_dev = {
	.id		= -1,
	.name		= "mem",
	.map_base	= IMX_SDRAM_CS0,
	.size		= 128 * 1024 * 1024,
	.platform_data	= &sdram_pdata,
};

struct imx_nand_platform_data nand_info = {
	.width		= 1,
	.hw_ecc		= 1,
	.flash_bbt	= 1,
};

static struct fb_videomode imxfb_mode = {
	.name		= "CMO_QVGA",
	.refresh	= 60,
	.xres		= 320,
	.yres		= 240,
	.pixclock	= KHZ2PICOS(7000),
	.left_margin	= 68,
	.right_margin	= 20,
	.upper_margin	= 15,
	.lower_margin	= 4,
	.hsync_len	= 30,
	.vsync_len	= 3,
	.sync		= 0,
	.vmode		= FB_VMODE_NONINTERLACED,
	.flag		= 0,
};

static void eukrea_cpuimx35_enable_display(int enable)
{
	gpio_direction_output(4, enable);
}

static struct imx_ipu_fb_platform_data ipu_fb_data = {
	.mode		= &imxfb_mode,
	.bpp		= 16,
	.enable		= eukrea_cpuimx35_enable_display,
};

#ifdef CONFIG_USB
static void imx35_usb_init(void)
{
	unsigned int tmp;

	/* Host 1 */
	tmp = readl(IMX_OTG_BASE + 0x600);
	tmp &= ~(MX35_H1_SIC_MASK | MX35_H1_PM_BIT | MX35_H1_TLL_BIT |
		MX35_H1_USBTE_BIT | MX35_H1_IPPUE_DOWN_BIT | MX35_H1_IPPUE_UP_BIT);
	tmp |= (MXC_EHCI_INTERFACE_SINGLE_UNI) << MX35_H1_SIC_SHIFT;
	tmp |= MX35_H1_USBTE_BIT;
	tmp |= MX35_H1_IPPUE_DOWN_BIT;
	writel(tmp, IMX_OTG_BASE + 0x600);

	tmp = readl(IMX_OTG_BASE + 0x584);
	tmp |= 3 << 30;
	writel(tmp, IMX_OTG_BASE + 0x584);

	/* Set to Host mode */
	tmp = readl(IMX_OTG_BASE + 0x5a8);
	writel(tmp | 0x3, IMX_OTG_BASE + 0x5a8);
}

static struct device_d usbh2_dev = {
	.id	  = -1,
	.name     = "ehci",
	.map_base = IMX_OTG_BASE + 0x400,
	.size     = 0x200,
};
#endif

static struct fsl_usb2_platform_data usb_pdata = {
	.operating_mode	= FSL_USB2_DR_DEVICE,
	.phy_mode	= FSL_USB2_PHY_UTMI,
};

static struct device_d usbotg_dev = {
	.name     = "fsl-udc",
	.map_base = IMX_OTG_BASE,
	.size     = 0x200,
	.platform_data = &usb_pdata,
};

#ifdef CONFIG_MMU
static int eukrea_cpuimx35_mmu_init(void)
{
	mmu_init();

	arm_create_section(0x80000000, 0x80000000, 128, PMD_SECT_DEF_CACHED);
	arm_create_section(0x90000000, 0x80000000, 128, PMD_SECT_DEF_UNCACHED);

	setup_dma_coherent(0x10000000);

	mmu_enable();

#ifdef CONFIG_CACHE_L2X0
	l2x0_init((void __iomem *)0x30000000, 0x00030024, 0x00000000);
#endif
	return 0;
}
postcore_initcall(eukrea_cpuimx35_mmu_init);
#endif

static int eukrea_cpuimx35_devices_init(void)
{
	imx35_add_nand(&nand_info);

	devfs_add_partition("nand0", 0x00000, 0x40000, PARTITION_FIXED, "self_raw");
	dev_add_bb_dev("self_raw", "self0");
	devfs_add_partition("nand0", 0x40000, 0x20000, PARTITION_FIXED, "env_raw");
	dev_add_bb_dev("env_raw", "env0");

	imx35_add_fec(&fec_info);

	register_device(&sdram_dev);
	imx35_add_fb(&ipu_fb_data);

	imx35_add_i2c0(NULL);
	imx35_add_mmc0(NULL);

#ifdef CONFIG_USB
	imx35_usb_init();
	register_device(&usbh2_dev);
#endif
#ifdef CONFIG_USB_GADGET
	/* Workaround ENGcm09152 */
	tmp = readl(IMX_OTG_BASE + 0x608);
	writel(tmp | (1 << 23), IMX_OTG_BASE + 0x608);
	register_device(&usbotg_dev);
#endif
	armlinux_add_dram(&sdram_dev);
	armlinux_set_bootparams((void *)0x80000100);
	armlinux_set_architecture(MACH_TYPE_EUKREA_CPUIMX35);

	return 0;
}

device_initcall(eukrea_cpuimx35_devices_init);

static struct pad_desc eukrea_cpuimx35_pads[] = {
	MX35_PAD_FEC_TX_CLK__FEC_TX_CLK,
	MX35_PAD_FEC_RX_CLK__FEC_RX_CLK,
	MX35_PAD_FEC_RX_DV__FEC_RX_DV,
	MX35_PAD_FEC_COL__FEC_COL,
	MX35_PAD_FEC_RDATA0__FEC_RDATA_0,
	MX35_PAD_FEC_TDATA0__FEC_TDATA_0,
	MX35_PAD_FEC_TX_EN__FEC_TX_EN,
	MX35_PAD_FEC_MDC__FEC_MDC,
	MX35_PAD_FEC_MDIO__FEC_MDIO,
	MX35_PAD_FEC_TX_ERR__FEC_TX_ERR,
	MX35_PAD_FEC_RX_ERR__FEC_RX_ERR,
	MX35_PAD_FEC_CRS__FEC_CRS,
	MX35_PAD_FEC_RDATA0__FEC_RDATA_0,
	MX35_PAD_FEC_TDATA0__FEC_TDATA_0,
	MX35_PAD_FEC_RDATA1__FEC_RDATA_1,
	MX35_PAD_FEC_TDATA1__FEC_TDATA_1,
	MX35_PAD_FEC_RDATA2__FEC_RDATA_2,
	MX35_PAD_FEC_TDATA2__FEC_TDATA_2,
	MX35_PAD_FEC_RDATA3__FEC_RDATA_3,
	MX35_PAD_FEC_TDATA3__FEC_TDATA_3,

	MX35_PAD_RXD1__UART1_RXD_MUX,
	MX35_PAD_TXD1__UART1_TXD_MUX,
	MX35_PAD_RTS1__UART1_RTS,
	MX35_PAD_CTS1__UART1_CTS,

	MX35_PAD_LD23__GPIO3_29,
	MX35_PAD_CONTRAST__GPIO1_1,
	MX35_PAD_D3_CLS__GPIO1_4,

	MX35_PAD_I2C1_CLK__I2C1_SCL,
	MX35_PAD_I2C1_DAT__I2C1_SDA,

	MX35_PAD_SD1_CMD__ESDHC1_CMD,
	MX35_PAD_SD1_CLK__ESDHC1_CLK,
	MX35_PAD_SD1_DATA0__ESDHC1_DAT0,
	MX35_PAD_SD1_DATA1__ESDHC1_DAT1,
	MX35_PAD_SD1_DATA2__ESDHC1_DAT2,
	MX35_PAD_SD1_DATA3__ESDHC1_DAT3,
};

static int eukrea_cpuimx35_console_init(void)
{
	mxc_iomux_v3_setup_multiple_pads(eukrea_cpuimx35_pads,
		ARRAY_SIZE(eukrea_cpuimx35_pads));

	/* screen default on to prevent flicker */
	gpio_direction_output(4, 0);
	/* backlight default off */
	gpio_direction_output(1, 0);
	/* led default off */
	gpio_direction_output(32 * 2 + 29, 1);

	imx35_add_uart0();
	return 0;
}

console_initcall(eukrea_cpuimx35_console_init);

static int eukrea_cpuimx35_core_init(void)
{
	u32 reg;

	/* enable clock for I2C1, SDHC1, USB and FEC */
	reg = readl(IMX_CCM_BASE + CCM_CGR1);
	reg |= 0x3 << CCM_CGR1_FEC_SHIFT;
	reg |= 0x3 << CCM_CGR1_SDHC1_SHIFT;
	reg |= 0x3 << CCM_CGR1_I2C1_SHIFT,
	reg = writel(reg, IMX_CCM_BASE + CCM_CGR1);
	reg = readl(IMX_CCM_BASE + CCM_CGR2);
	reg |= 0x3 << CCM_CGR2_USB_SHIFT;
	reg = writel(reg, IMX_CCM_BASE + CCM_CGR2);

	/* AIPS setup - Only setup MPROTx registers. The PACR default values are good.*/
	/*
	 * Set all MPROTx to be non-bufferable, trusted for R/W,
	 * not forced to user-mode.
	 */
	writel(0x77777777, IMX_AIPS1_BASE);
	writel(0x77777777, IMX_AIPS1_BASE + 0x4);
	writel(0x77777777, IMX_AIPS2_BASE);
	writel(0x77777777, IMX_AIPS2_BASE + 0x4);

	/*
	 * Clear the on and off peripheral modules Supervisor Protect bit
	 * for SDMA to access them. Did not change the AIPS control registers
	 * (offset 0x20) access type
	 */
	writel(0x0, IMX_AIPS1_BASE + 0x40);
	writel(0x0, IMX_AIPS1_BASE + 0x44);
	writel(0x0, IMX_AIPS1_BASE + 0x48);
	writel(0x0, IMX_AIPS1_BASE + 0x4C);
	reg = readl(IMX_AIPS1_BASE + 0x50);
	reg &= 0x00FFFFFF;
	writel(reg, IMX_AIPS1_BASE + 0x50);

	writel(0x0, IMX_AIPS2_BASE + 0x40);
	writel(0x0, IMX_AIPS2_BASE + 0x44);
	writel(0x0, IMX_AIPS2_BASE + 0x48);
	writel(0x0, IMX_AIPS2_BASE + 0x4C);
	reg = readl(IMX_AIPS2_BASE + 0x50);
	reg &= 0x00FFFFFF;
	writel(reg, IMX_AIPS2_BASE + 0x50);

	/* MAX (Multi-Layer AHB Crossbar Switch) setup */

	/* MPR - priority is M4 > M2 > M3 > M5 > M0 > M1 */
#define MAX_PARAM1 0x00302154
	writel(MAX_PARAM1, IMX_MAX_BASE + 0x000); /* for S0 */
	writel(MAX_PARAM1, IMX_MAX_BASE + 0x100); /* for S1 */
	writel(MAX_PARAM1, IMX_MAX_BASE + 0x200); /* for S2 */
	writel(MAX_PARAM1, IMX_MAX_BASE + 0x300); /* for S3 */
	writel(MAX_PARAM1, IMX_MAX_BASE + 0x400); /* for S4 */

	/* SGPCR - always park on last master */
	writel(0x10, IMX_MAX_BASE + 0x10);	/* for S0 */
	writel(0x10, IMX_MAX_BASE + 0x110);	/* for S1 */
	writel(0x10, IMX_MAX_BASE + 0x210);	/* for S2 */
	writel(0x10, IMX_MAX_BASE + 0x310);	/* for S3 */
	writel(0x10, IMX_MAX_BASE + 0x410);	/* for S4 */

	/* MGPCR - restore default values */
	writel(0x0, IMX_MAX_BASE + 0x800);	/* for M0 */
	writel(0x0, IMX_MAX_BASE + 0x900);	/* for M1 */
	writel(0x0, IMX_MAX_BASE + 0xa00);	/* for M2 */
	writel(0x0, IMX_MAX_BASE + 0xb00);	/* for M3 */
	writel(0x0, IMX_MAX_BASE + 0xc00);	/* for M4 */
	writel(0x0, IMX_MAX_BASE + 0xd00);	/* for M5 */

	/*
	 * M3IF Control Register (M3IFCTL)
	 * MRRP[0] = L2CC0 not on priority list (0 << 0)	= 0x00000000
	 * MRRP[1] = MAX1 not on priority list (0 << 0)		= 0x00000000
	 * MRRP[2] = L2CC1 not on priority list (0 << 0)	= 0x00000000
	 * MRRP[3] = USB  not on priority list (0 << 0)		= 0x00000000
	 * MRRP[4] = SDMA not on priority list (0 << 0)		= 0x00000000
	 * MRRP[5] = GPU not on priority list (0 << 0)		= 0x00000000
	 * MRRP[6] = IPU1 on priority list (1 << 6)		= 0x00000040
	 * MRRP[7] = IPU2 not on priority list (0 << 0)		= 0x00000000
	 *                                                       ------------
	 *                                                        0x00000040
	 */
	writel(0x40, IMX_M3IF_BASE);

	return 0;
}

core_initcall(eukrea_cpuimx35_core_init);

#define MPCTL_PARAM_399     (IMX_PLL_PD(0) | IMX_PLL_MFD(15) | IMX_PLL_MFI(8) | IMX_PLL_MFN(5))
#define MPCTL_PARAM_532     ((1 << 31) | IMX_PLL_PD(0) | IMX_PLL_MFD(11) | IMX_PLL_MFI(11) | IMX_PLL_MFN(1))

static int do_cpufreq(struct command *cmdtp, int argc, char *argv[])
{
	unsigned long freq;

	if (argc != 2)
		return COMMAND_ERROR_USAGE;

	freq = simple_strtoul(argv[1], NULL, 0);

	switch (freq) {
	case 399:
		writel(MPCTL_PARAM_399, IMX_CCM_BASE + CCM_MPCTL);
		break;
	case 532:
		writel(MPCTL_PARAM_532, IMX_CCM_BASE + CCM_MPCTL);
		break;
	default:
		return COMMAND_ERROR_USAGE;
	}

	printf("Switched CPU frequency to %ldMHz\n", freq);

	return 0;
}

static const __maybe_unused char cmd_cpufreq_help[] =
"Usage: cpufreq 399|532\n"
"\n"
"Set CPU frequency to <freq> MHz\n";

BAREBOX_CMD_START(cpufreq)
	.cmd            = do_cpufreq,
	.usage          = "adjust CPU frequency",
	BAREBOX_CMD_HELP(cmd_cpufreq_help)
BAREBOX_CMD_END