uboot-vybrid_public/arch/arm/cpu/armv7/vf610/generic.c

/*
 * Copyright 2013 Freescale Semiconductor, Inc.
 *
 * 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>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <usb/regs-usbphy-mx6.h>
#include <netdev.h>
#ifdef CONFIG_FSL_ESDHC
#include <fsl_esdhc.h>
#endif

#ifdef CONFIG_FSL_ESDHC
DECLARE_GLOBAL_DATA_PTR;
#endif

#ifdef CONFIG_MXC_OCOTP
void enable_ocotp_clk(unsigned char enable)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 reg;

	reg = readl(&ccm->ccgr6);
	if (enable)
		reg |= CCM_CCGR6_OCOTP_CTRL_MASK;
	else
		reg &= ~CCM_CCGR6_OCOTP_CTRL_MASK;
	writel(reg, &ccm->ccgr6);
}
#endif

static u32 get_mcu_main_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 ccm_ccsr, ccm_cacrr, armclk_div;
	u32 sysclk_sel, pll_pfd_sel = 0;
	u32 freq = 0;

	ccm_ccsr = readl(&ccm->ccsr);
	sysclk_sel = ccm_ccsr & CCM_CCSR_SYS_CLK_SEL_MASK;
	sysclk_sel >>= CCM_CCSR_SYS_CLK_SEL_OFFSET;

	ccm_cacrr = readl(&ccm->cacrr);
	armclk_div = ccm_cacrr & CCM_CACRR_ARM_CLK_DIV_MASK;
	armclk_div >>= CCM_CACRR_ARM_CLK_DIV_OFFSET;
	armclk_div += 1;

	switch (sysclk_sel) {
	case 0:
		freq = FASE_CLK_FREQ;
		break;
	case 1:
		freq = SLOW_CLK_FREQ;
		break;
	case 2:
		pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL2_PFD_CLK_SEL_MASK;
		pll_pfd_sel >>= CCM_CCSR_PLL2_PFD_CLK_SEL_OFFSET;
		if (pll_pfd_sel == 0)
			freq = PLL2_MAIN_FREQ;
		else if (pll_pfd_sel == 1)
			freq = PLL2_PFD1_FREQ;
		else if (pll_pfd_sel == 2)
			freq = PLL2_PFD2_FREQ;
		else if (pll_pfd_sel == 3)
			freq = PLL2_PFD3_FREQ;
		else if (pll_pfd_sel == 4)
			freq = PLL2_PFD4_FREQ;
		break;
	case 3:
		freq = PLL2_MAIN_FREQ;
		break;
	case 4:
		pll_pfd_sel = ccm_ccsr & CCM_CCSR_PLL1_PFD_CLK_SEL_MASK;
		pll_pfd_sel >>= CCM_CCSR_PLL1_PFD_CLK_SEL_OFFSET;
		if (pll_pfd_sel == 0)
			freq = PLL1_MAIN_FREQ;
		else if (pll_pfd_sel == 1)
			freq = PLL1_PFD1_FREQ;
		else if (pll_pfd_sel == 2)
			freq = PLL1_PFD2_FREQ;
		else if (pll_pfd_sel == 3)
			freq = PLL1_PFD3_FREQ;
		else if (pll_pfd_sel == 4)
			freq = PLL1_PFD4_FREQ;
		break;
	case 5:
		freq = PLL3_MAIN_FREQ;
		break;
	default:
		printf("unsupported system clock select\n");
	}

	return freq / armclk_div;
}

static u32 get_bus_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 ccm_cacrr, busclk_div;

	ccm_cacrr = readl(&ccm->cacrr);

	busclk_div = ccm_cacrr & CCM_CACRR_BUS_CLK_DIV_MASK;
	busclk_div >>= CCM_CACRR_BUS_CLK_DIV_OFFSET;
	busclk_div += 1;

	return get_mcu_main_clk() / busclk_div;
}

static u32 get_ipg_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 ccm_cacrr, ipgclk_div;

	ccm_cacrr = readl(&ccm->cacrr);

	ipgclk_div = ccm_cacrr & CCM_CACRR_IPG_CLK_DIV_MASK;
	ipgclk_div >>= CCM_CACRR_IPG_CLK_DIV_OFFSET;
	ipgclk_div += 1;

	return get_bus_clk() / ipgclk_div;
}

static u32 get_uart_clk(void)
{
	return get_ipg_clk();
}

static u32 get_sdhc_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 ccm_cscmr1, ccm_cscdr2, sdhc_clk_sel, sdhc_clk_div;
	u32 freq = 0;

	ccm_cscmr1 = readl(&ccm->cscmr1);
	sdhc_clk_sel = ccm_cscmr1 & CCM_CSCMR1_ESDHC1_CLK_SEL_MASK;
	sdhc_clk_sel >>= CCM_CSCMR1_ESDHC1_CLK_SEL_OFFSET;

	ccm_cscdr2 = readl(&ccm->cscdr2);
	sdhc_clk_div = ccm_cscdr2 & CCM_CSCDR2_ESDHC1_CLK_DIV_MASK;
	sdhc_clk_div >>= CCM_CSCDR2_ESDHC1_CLK_DIV_OFFSET;
	sdhc_clk_div += 1;

	switch (sdhc_clk_sel) {
	case 0:
		freq = PLL3_MAIN_FREQ;
		break;
	case 1:
		freq = PLL3_PFD3_FREQ;
		break;
	case 2:
		freq = PLL1_PFD3_FREQ;
		break;
	case 3:
		freq = get_bus_clk();
		break;
	}

	return freq / sdhc_clk_div;
}

u32 get_fec_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	u32 ccm_cscmr2, rmii_clk_sel;
	u32 freq = 0;

	ccm_cscmr2 = readl(&ccm->cscmr2);
	rmii_clk_sel = ccm_cscmr2 & CCM_CSCMR2_RMII_CLK_SEL_MASK;
	rmii_clk_sel >>= CCM_CSCMR2_RMII_CLK_SEL_OFFSET;

	switch (rmii_clk_sel) {
	case 0:
		freq = ENET_EXTERNAL_CLK;
		break;
	case 1:
		freq = AUDIO_EXTERNAL_CLK;
		break;
	case 2:
		freq = PLL5_MAIN_FREQ;
		break;
	case 3:
		freq = PLL5_MAIN_FREQ / 2;
		break;
	}

	return freq;
}

unsigned int mxc_get_clock(enum mxc_clock clk)
{
	switch (clk) {
	case MXC_ARM_CLK:
		return get_mcu_main_clk();
	case MXC_BUS_CLK:
		return get_bus_clk();
	case MXC_IPG_CLK:
		return get_ipg_clk();
	case MXC_UART_CLK:
		return get_uart_clk();
	case MXC_ESDHC_CLK:
		return get_sdhc_clk();
	case MXC_FEC_CLK:
		return get_fec_clk();
	default:
		break;
	}
	return -1;
}

/* Dump some core clocks */
int do_vf610_showclocks(cmd_tbl_t *cmdtp, int flag, int argc,
			 char * const argv[])
{
	printf("\n");
	printf("cpu clock : %8d MHz\n", mxc_get_clock(MXC_ARM_CLK) / 1000000);
	printf("bus clock : %8d MHz\n", mxc_get_clock(MXC_BUS_CLK) / 1000000);
	printf("ipg clock : %8d MHz\n", mxc_get_clock(MXC_IPG_CLK) / 1000000);

	return 0;
}

U_BOOT_CMD(
	clocks, CONFIG_SYS_MAXARGS, 1, do_vf610_showclocks,
	"display clocks",
	""
);

#ifdef CONFIG_FEC_MXC
void imx_get_mac_from_fuse(int dev_id, unsigned char *mac)
{
	struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
	struct fuse_bank *bank = &ocotp->bank[4];
	struct fuse_bank4_regs *fuse =
		(struct fuse_bank4_regs *)bank->fuse_regs;

	u32 value = readl(&fuse->mac_addr0);
	mac[0] = (value >> 8);
	mac[1] = value;

	value = readl(&fuse->mac_addr1);
	mac[2] = value >> 24;
	mac[3] = value >> 16;
	mac[4] = value >> 8;
	mac[5] = value;
}
#endif

#if defined(CONFIG_DISPLAY_CPUINFO)
static char *get_reset_cause(void)
{
	u32 cause;
	struct src *src_regs = (struct src *)SRC_BASE_ADDR;

	cause = readl(&src_regs->srsr);
	writel(cause, &src_regs->srsr);
	cause &= 0xff;

	switch (cause) {
	case 0x08:
		return "WDOG";
	case 0x20:
		return "JTAG HIGH-Z";
	case 0x80:
		return "EXTERNAL RESET";
	case 0xfd:
		return "POR";
	default:
		return "unknown reset";
	}
}

int print_cpuinfo(void)
{
	printf("CPU:   Freescale Vybrid VF610 at %d MHz\n",
		mxc_get_clock(MXC_ARM_CLK) / 1000000);
	printf("Reset cause: %s\n", get_reset_cause());

	return 0;
}
#endif

int cpu_eth_init(bd_t *bis)
{
	int rc = -ENODEV;

#if defined(CONFIG_FEC_MXC)
	rc = fecmxc_initialize(bis);
#endif

	return rc;
}

#ifdef CONFIG_FSL_ESDHC
int cpu_mmc_init(bd_t *bis)
{
	return fsl_esdhc_mmc_init(bis);
}
#endif

int get_clocks(void)
{
#ifdef CONFIG_FSL_ESDHC
	gd->arch.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
#endif
	return 0;
}

void set_usboh3_clk(void)
{
        udc_pins_setting();
}

void set_usb_phy1_clk(void)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	struct anadig_reg *anadig = (struct anadig_reg *)ANADIG_BASE_ADDR;
    u32 reg;
    /*setup clocking and PLL*/
    reg = readl(&ccm->clpcr);
    reg &= ~CCM_CLPCR_SBYOS_MASK;
    writel(reg, &ccm->clpcr);

    /*setup 3v0 regulator*/
    reg = readl(&anadig->reg_3p0);
    reg |= ANADIG_3P0_EN_BO_MASK;
    reg |= ANADIG_3P0_EN_LINREG_MASK;
    writel(reg, &anadig->reg_3p0);
    while(!(readl(&anadig->reg_3p0)& ANADIG_3P0_OK_VDD3P0_MASK));


    reg = readl(&anadig->pll3_ctrl);
    reg &= ~ANADIG_PLL3_CTRL_BYPASS_CLK_SRC;
    reg &= ~ANADIG_PLL3_CTRL_BYPASS;
    reg |= ANADIG_PLL3_CTRL_POWERDOWN;
    reg |= ANADIG_PLL3_CTRL_ENUSBCLK;
    writel(reg, &anadig->pll3_ctrl);
}

void enable_usboh3_clk(unsigned char enable)
{
	struct ccm_reg *ccm = (struct ccm_reg *)CCM_BASE_ADDR;
	struct anadig_reg *anadig = (struct anadig_reg *)ANADIG_BASE_ADDR;
    u32 reg;
    reg = readl(&ccm->ccgr1);
    if (enable)
            reg |= CCM_CCGR1_USBC0_CTRL_MASK ;
    else
            reg &= ~CCM_CCGR1_USBC0_CTRL_MASK;
    writel(reg, &ccm->ccgr1);

    reg = readl(&anadig->pll3_ctrl);
    reg &= ~ANADIG_PLL3_CTRL_BYPASS_CLK_SRC;
    reg &= ~ANADIG_PLL3_CTRL_BYPASS;
    reg |= ANADIG_PLL3_CTRL_POWERDOWN;
    reg |= ANADIG_PLL3_CTRL_ENUSBCLK;
    writel(reg, &anadig->pll3_ctrl);
}

void enable_usb_phy1_clk(unsigned char enable)
{
    u32 reg;
    void* usb_reg = (void *)0x40035800;
    if (enable) {
        writel(BM_USBPHY_CTRL_SFTRST | BM_USBPHY_CTRL_CLKGATE, USB_PHY0_BASE_ADDR + HW_USBPHY_CTRL_CLR);
        writel(BM_USBPHY_DEBUG_CLKGATE, USB_PHY0_BASE_ADDR + HW_USBPHY_DEBUG_CLR);
        writel(BM_USBPHY_CTRL_ENUTMILEVEL3 | BM_USBPHY_CTRL_ENUTMILEVEL2, USB_PHY0_BASE_ADDR + HW_USBPHY_CTRL_SET);
        writel(0, USB_PHY0_BASE_ADDR + HW_USBPHY_PWD);
        reg = readl(&usb_reg);
        reg |= 1<<9;
        writel(reg, &usb_reg);
    } else {
        writel(BM_USBPHY_CTRL_CLKGATE, USB_PHY0_BASE_ADDR + HW_USBPHY_CTRL_SET);
    }
}

#define USB_USBCMD		(OTG_BASE_ADDR + 0x0140)
#define USB_CMD_RUN_STOP	(0x00000001)
#define USB_CMD_CTRL_RESET	(0x00000002)
#define PORTSC_PHCD		(1 << 23)
#define USB_PORTSC1		(OTG_BASE_ADDR + 0x0184)
void usb_phy_enable(void)
{
	u32 tmp;
	void *phy_reg = USB_PHY0_BASE_ADDR;
	void *phy_ctrl;

	/* Stop then Reset */
	writel(readl(USB_USBCMD) & ~USB_CMD_RUN_STOP, USB_USBCMD);
	writel(readl(USB_USBCMD) | USB_CMD_CTRL_RESET, USB_USBCMD);

	/* Reset USBPHY module */
	phy_ctrl = HW_USBPHY_CTRL;
	writel(readl(phy_ctrl) | BM_USBPHY_CTRL_SFTRST, phy_ctrl);
	udelay(10);

	/* Remove CLKGATE and SFTRST */
	tmp = readl(phy_ctrl);
	tmp &= ~(BM_USBPHY_CTRL_CLKGATE | BM_USBPHY_CTRL_SFTRST);
	writel(tmp, phy_ctrl);
	udelay(10);

	/* Power up the PHY */
	writel(0, phy_reg + HW_USBPHY_PWD);
	/* enable FS/LS device */
	tmp = readl(phy_reg + HW_USBPHY_CTRL);
	tmp |= (BM_USBPHY_CTRL_ENUTMILEVEL2 | BM_USBPHY_CTRL_ENUTMILEVEL3);
	writel(tmp, phy_reg + HW_USBPHY_CTRL);

	if(readl(USB_PORTSC1) & PORTSC_PHCD) {
		writel(readl(USB_PORTSC1) & ~PORTSC_PHCD, USB_PORTSC1);
		mdelay(1);
	}
	writel(BM_USBPHY_CTRL_CLKGATE, phy_reg + HW_USBPHY_CTRL_CLR);
	tmp = (BM_USBPHY_PWD_TXPWDFS
		| BM_USBPHY_PWD_TXPWDIBIAS
		| BM_USBPHY_PWD_TXPWDV2I
		| BM_USBPHY_PWD_RXPWDENV
		| BM_USBPHY_PWD_RXPWD1PT1
		| BM_USBPHY_PWD_RXPWDDIFF
		| BM_USBPHY_PWD_RXPWDRX);
	writel(tmp, phy_reg + HW_USBPHY_PWD_CLR);

	mdelay(3);
}