imx:mx6sxsabresd board spl support

Add board level spl support for mx6sxsabresd board.
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>

board/freescale/mx6sxsabresd/MAINTAINERS

@@ -4,3 +4,4 @@ S:	Maintained
 F:	board/freescale/mx6sxsabresd/
 F:	include/configs/mx6sxsabresd.h
 F:	configs/mx6sxsabresd_defconfig
+F:	configs/mx6sxsabresd_spl_defconfig

board/freescale/mx6sxsabresd/mx6sxsabresd.c

@@ -326,6 +326,7 @@ int board_mmc_getcd(struct mmc *mmc)
 
 int board_mmc_init(bd_t *bis)
 {
+#ifndef CONFIG_SPL_BUILD
 	int i, ret;
 
 	/*
@@ -369,6 +370,47 @@ int board_mmc_init(bd_t *bis)
 	}
 
 	return 0;
+#else
+	struct src *src_regs = (struct src *)SRC_BASE_ADDR;
+	u32 val;
+	u32 port;
+
+	val = readl(&src_regs->sbmr1);
+
+	if ((val & 0xc0) != 0x40) {
+		printf("Not boot from USDHC!\n");
+		return -EINVAL;
+	}
+
+	port = (val >> 11) & 0x3;
+	printf("port %d\n", port);
+	switch (port) {
+	case 1:
+		imx_iomux_v3_setup_multiple_pads(
+			usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+		usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+		usdhc_cfg[0].esdhc_base = USDHC2_BASE_ADDR;
+		break;
+	case 2:
+		imx_iomux_v3_setup_multiple_pads(
+			usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+		gpio_direction_input(USDHC3_CD_GPIO);
+		gpio_direction_output(USDHC3_PWR_GPIO, 1);
+		usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+		usdhc_cfg[0].esdhc_base = USDHC3_BASE_ADDR;
+		break;
+	case 3:
+		imx_iomux_v3_setup_multiple_pads(
+			usdhc4_pads, ARRAY_SIZE(usdhc4_pads));
+		gpio_direction_input(USDHC4_CD_GPIO);
+		usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
+		usdhc_cfg[0].esdhc_base = USDHC4_BASE_ADDR;
+		break;
+	}
+
+	gd->arch.sdhc_clk = usdhc_cfg[0].sdhc_clk;
+	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
+#endif
 }
 
 #ifdef CONFIG_FSL_QSPI
@@ -429,3 +471,129 @@ int checkboard(void)
 
 	return 0;
 }
+
+#ifdef CONFIG_SPL_BUILD
+#include <libfdt.h>
+#include <spl.h>
+#include <asm/arch/mx6-ddr.h>
+
+const struct mx6sx_iomux_ddr_regs mx6_ddr_ioregs = {
+	.dram_dqm0 = 0x00000028,
+	.dram_dqm1 = 0x00000028,
+	.dram_dqm2 = 0x00000028,
+	.dram_dqm3 = 0x00000028,
+	.dram_ras = 0x00000020,
+	.dram_cas = 0x00000020,
+	.dram_odt0 = 0x00000020,
+	.dram_odt1 = 0x00000020,
+	.dram_sdba2 = 0x00000000,
+	.dram_sdcke0 = 0x00003000,
+	.dram_sdcke1 = 0x00003000,
+	.dram_sdclk_0 = 0x00000030,
+	.dram_sdqs0 = 0x00000028,
+	.dram_sdqs1 = 0x00000028,
+	.dram_sdqs2 = 0x00000028,
+	.dram_sdqs3 = 0x00000028,
+	.dram_reset = 0x00000020,
+};
+
+const struct mx6sx_iomux_grp_regs mx6_grp_ioregs = {
+	.grp_addds = 0x00000020,
+	.grp_ddrmode_ctl = 0x00020000,
+	.grp_ddrpke = 0x00000000,
+	.grp_ddrmode = 0x00020000,
+	.grp_b0ds = 0x00000028,
+	.grp_b1ds = 0x00000028,
+	.grp_ctlds = 0x00000020,
+	.grp_ddr_type = 0x000c0000,
+	.grp_b2ds = 0x00000028,
+	.grp_b3ds = 0x00000028,
+};
+
+const struct mx6_mmdc_calibration mx6_mmcd_calib = {
+	.p0_mpwldectrl0 = 0x00290025,
+	.p0_mpwldectrl1 = 0x00220022,
+	.p0_mpdgctrl0 = 0x41480144,
+	.p0_mpdgctrl1 = 0x01340130,
+	.p0_mprddlctl = 0x3C3E4244,
+	.p0_mpwrdlctl = 0x34363638,
+};
+
+static struct mx6_ddr3_cfg mem_ddr = {
+	.mem_speed = 1600,
+	.density = 4,
+	.width = 32,
+	.banks = 8,
+	.rowaddr = 15,
+	.coladdr = 10,
+	.pagesz = 2,
+	.trcd = 1375,
+	.trcmin = 4875,
+	.trasmin = 3500,
+};
+
+static void ccgr_init(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	writel(0xFFFFFFFF, &ccm->CCGR0);
+	writel(0xFFFFFFFF, &ccm->CCGR1);
+	writel(0xFFFFFFFF, &ccm->CCGR2);
+	writel(0xFFFFFFFF, &ccm->CCGR3);
+	writel(0xFFFFFFFF, &ccm->CCGR4);
+	writel(0xFFFFFFFF, &ccm->CCGR5);
+	writel(0xFFFFFFFF, &ccm->CCGR6);
+	writel(0xFFFFFFFF, &ccm->CCGR7);
+}
+
+static void spl_dram_init(void)
+{
+	struct mx6_ddr_sysinfo sysinfo = {
+		.dsize = mem_ddr.width/32,
+		.cs_density = 24,
+		.ncs = 1,
+		.cs1_mirror = 0,
+		.rtt_wr = 2,
+		.rtt_nom = 2,		/* RTT_Nom = RZQ/2 */
+		.walat = 1,		/* Write additional latency */
+		.ralat = 5,		/* Read additional latency */
+		.mif3_mode = 3,		/* Command prediction working mode */
+		.bi_on = 1,		/* Bank interleaving enabled */
+		.sde_to_rst = 0x10,	/* 14 cycles, 200us (JEDEC default) */
+		.rst_to_cke = 0x23,	/* 33 cycles, 500us (JEDEC default) */
+	};
+
+	mx6sx_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
+	mx6_dram_cfg(&sysinfo, &mx6_mmcd_calib, &mem_ddr);
+}
+
+void board_init_f(ulong dummy)
+{
+	/* setup AIPS and disable watchdog */
+	arch_cpu_init();
+
+	ccgr_init();
+
+	/* iomux and setup of i2c */
+	board_early_init_f();
+
+	/* setup GP timer */
+	timer_init();
+
+	/* UART clocks enabled and gd valid - init serial console */
+	preloader_console_init();
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	/* load/boot image from boot device */
+	board_init_r(NULL, 0);
+}
+
+void reset_cpu(ulong addr)
+{
+}
+#endif