This file will enable the support for SPL on iMX6 Sabrex families.
It tested on SD2 and SD3 mmc port.
---
board/freescale/mx6sabresd/mx6sabresd_spl.c | 277 ++++++++++++++++++++++++++++
1 file changed, 277 insertions(+)
create mode 100644 board/freescale/mx6sabresd/mx6sabresd_spl.c
diff --git a/board/freescale/mx6sabresd/mx6sabresd_spl.c
b/board/freescale/mx6sabresd/mx6sabresd_spl.c
new file mode 100644
index 0000000..1d9ec6e
--- /dev/null
+++ b/board/freescale/mx6sabresd/mx6sabresd_spl.c
@@ -0,0 +1,277 @@
+/*
+ * Author: John Tobias <john.tobias...@gmail.com>
+ *
+ * Derived from EDM_CF_IMX6 code by TechNexion,Inc
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#if defined(CONFIG_SPL_BUILD)
+#include <asm/arch/clock.h>
+#include <asm/arch/mx6-pins.h>
+#include <fsl_esdhc.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <spl.h>
+#include <libfdt.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define BOOT_CFG 0x20D8004
+
+#define __REG(x) (*((volatile u32 *)(x)))
+
+#define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP | \
+ PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \
+ PAD_CTL_SRE_FAST | PAD_CTL_HYS)
+
+struct fsl_esdhc_cfg spl_usdhc_cfg;
+
+iomux_v3_cfg_t const spl_usdhc2_pads[] = {
+ MX6_PAD_SD2_CLK__SD2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD2_CMD__SD2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D4__SD2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D5__SD2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D6__SD2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D7__SD2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D2__GPIO2_IO02 | MUX_PAD_CTRL(NO_PAD_CTRL), /* CD */
+};
+
+iomux_v3_cfg_t const spl_usdhc3_pads[] = {
+ MX6_PAD_SD3_CLK__SD3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_CMD__SD3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT0__SD3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT4__SD3_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT5__SD3_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT6__SD3_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD3_DAT7__SD3_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_NANDF_D0__GPIO2_IO00 | MUX_PAD_CTRL(NO_PAD_CTRL), /* CD */
+};
+
+iomux_v3_cfg_t const spl_usdhc4_pads[] = {
+ MX6_PAD_SD4_CLK__SD4_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_CMD__SD4_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT0__SD4_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT1__SD4_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT2__SD4_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT3__SD4_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT4__SD4_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT5__SD4_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT6__SD4_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ MX6_PAD_SD4_DAT7__SD4_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+};
+
+/*
+ * Got it from mx6q_4x_mt41j128.cfg file
+ */
+void set_mt41j128_ddr(void)
+{
+ __REG(0x020e05a8) = 0x00000028;
+ __REG(0x020e05b0) = 0x00000028;
+ __REG(0x020e0524) = 0x00000028;
+ __REG(0x020e051c) = 0x00000028;
+
+ __REG(0x020e0518) = 0x00000028;
+ __REG(0x020e050c) = 0x00000028;
+ __REG(0x020e05b8) = 0x00000028;
+ __REG(0x020e05c0) = 0x00000028;
+
+ __REG(0x020e05ac) = 0x00000028;
+ __REG(0x020e05b4) = 0x00000028;
+ __REG(0x020e0528) = 0x00000028;
+ __REG(0x020e0520) = 0x00000028;
+
+ __REG(0x020e0514) = 0x00000028;
+ __REG(0x020e0510) = 0x00000028;
+ __REG(0x020e05bc) = 0x00000028;
+ __REG(0x020e05c4) = 0x00000028;
+
+ __REG(0x020e056c) = 0x00000030;
+ __REG(0x020e0578) = 0x00000030;
+ __REG(0x020e0588) = 0x00000030;
+ __REG(0x020e0594) = 0x00000030;
+
+ __REG(0x020e057c) = 0x00000030;
+ __REG(0x020e0590) = 0x00000030;
+ __REG(0x020e0598) = 0x00000030;
+ __REG(0x020e058c) = 0x00000000;
+
+ __REG(0x020e059c) = 0x00003030;
+ __REG(0x020e05a0) = 0x00003030;
+ __REG(0x020e0784) = 0x00000028;
+ __REG(0x020e0788) = 0x00000028;
+
+ __REG(0x020e0794) = 0x00000028;
+ __REG(0x020e079c) = 0x00000028;
+ __REG(0x020e07a0) = 0x00000028;
+ __REG(0x020e07a4) = 0x00000028;
+
+ __REG(0x020e07a8) = 0x00000028;
+ __REG(0x020e0748) = 0x00000028;
+ __REG(0x020e074c) = 0x00000030;
+ __REG(0x020e0750) = 0x00020000;
+
+ __REG(0x020e0758) = 0x00000000;
+ __REG(0x020e0774) = 0x00020000;
+ __REG(0x020e078c) = 0x00000030;
+ __REG(0x020e0798) = 0x000C0000;
+
+ __REG(0x021b081c) = 0x33333333;
+ __REG(0x021b0820) = 0x33333333;
+ __REG(0x021b0824) = 0x33333333;
+ __REG(0x021b0828) = 0x33333333;
+
+ __REG(0x021b481c) = 0x33333333;
+ __REG(0x021b4820) = 0x33333333;
+ __REG(0x021b4824) = 0x33333333;
+ __REG(0x021b4828) = 0x33333333;
+
+ __REG(0x021b0018) = 0x00001740;
+
+ __REG(0x021b001c) = 0x00008000;
+ __REG(0x021b000c) = 0x8A8F7975;
+ __REG(0x021b0010) = 0xFF538E64;
+ __REG(0x021b0014) = 0x01FF00DB;
+ __REG(0x021b002c) = 0x000026D2;
+
+ __REG(0x021b0030) = 0x008F0E21;
+ __REG(0x021b0008) = 0x09444040;
+ __REG(0x021b0004) = 0x00020036;
+ __REG(0x021b0040) = 0x00000047;
+ __REG(0x021b0000) = 0x841A0000;
+
+ __REG(0x021b001c) = 0x04088032;
+ __REG(0x021b001c) = 0x00008033;
+ __REG(0x021b001c) = 0x00428031;
+ __REG(0x021b001c) = 0x09408030;
+
+ __REG(0x021b001c) = 0x04008040;
+ __REG(0x021b0800) = 0xA1380003;
+ __REG(0x021b0020) = 0x00005800;
+ __REG(0x021b0818) = 0x00000007;
+ __REG(0x021b4818) = 0x00000007;
+
+ /* Calibration values based on ARD and 528MHz */
+ __REG(0x021b083c) = 0x434B0358;
+ __REG(0x021b0840) = 0x033D033C;
+ __REG(0x021b483c) = 0x03520362;
+ __REG(0x021b4840) = 0x03480318;
+ __REG(0x021b0848) = 0x41383A3C;
+ __REG(0x021b4848) = 0x3F3C374A;
+ __REG(0x021b0850) = 0x42434444;
+ __REG(0x021b4850) = 0x4932473A;
+
+ __REG(0x021b080c) = 0x001F001F;
+ __REG(0x021b0810) = 0x001F001F;
+
+ __REG(0x021b480c) = 0x001F001F;
+ __REG(0x021b4810) = 0x001F001F;
+
+ __REG(0x021b08b8) = 0x00000800;
+ __REG(0x021b48b8) = 0x00000800;
+
+ __REG(0x021b0404) = 0x00011006;
+ __REG(0x021b0004) = 0x00025576;
+
+ __REG(0x021b001c) = 0x00000000;
+
+ __REG(0x020c4068) = 0x00C03F3F;
+ __REG(0x020c406c) = 0x0030FC00;
+ __REG(0x020c4070) = 0x0FFFC000;
+ __REG(0x020c4074) = 0x3FF00000;
+ __REG(0x020c4078) = 0x00FFF300;
+ __REG(0x020c407c) = 0x0F0000C3;
+ __REG(0x020c4080) = 0x000003FF;
+}
+
+/*
+ * This section require the differentiation
+ * between iMX6 Sabre Families.
+ * But for now, it will configure only for
+ * SabreSD.
+ */
+static u32 spl_dram_init(void)
+{
+ u32 ddr_size;
+
+ set_mt41j128_ddr();
+ ddr_size = 0x40000000;
+
+ return ddr_size;
+}
+
+int spl_board_mmc_init(bd_t *bis)
+{
+ unsigned reg = readl(BOOT_CFG);
+ /*
+ * Upon reading BOOT_CFG register the following map is done:
+ * (U-boot device node) (Physical Port)
+ * 0x840 SD2
+ * 0x1040 SD3
+ * 0x1840 eMMC
+ */
+ switch (reg) {
+ case 0x840:
+ imx_iomux_v3_setup_multiple_pads(
+ spl_usdhc2_pads, ARRAY_SIZE(spl_usdhc2_pads));
+ spl_usdhc_cfg.esdhc_base = USDHC2_BASE_ADDR;
+ spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+ gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk;
+ break;
+ case 0x1040:
+ imx_iomux_v3_setup_multiple_pads(
+ spl_usdhc3_pads, ARRAY_SIZE(spl_usdhc3_pads));
+ spl_usdhc_cfg.esdhc_base = USDHC3_BASE_ADDR;
+ spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+ gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk;
+ break;
+ case 0x1840:
+ imx_iomux_v3_setup_multiple_pads(
+ spl_usdhc4_pads, ARRAY_SIZE(spl_usdhc4_pads));
+ spl_usdhc_cfg.esdhc_base = USDHC4_BASE_ADDR;
+ spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
+ gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk;
+ break;
+ }
+
+ return fsl_esdhc_initialize(bis, &spl_usdhc_cfg);
+}
+
+void board_init_f(ulong dummy)
+{
+ u32 ram_size;
+
+ /* Set the stack pointer. */
+ asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK));
+
+ ram_size = spl_dram_init();
+
+ arch_cpu_init();
+
+ /* Clear the BSS. */
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ /* Set global data pointer. */
+ gd = &gdata;
+ gd->ram_size = ram_size;
+
+ board_early_init_f();
+
+ timer_init();
+
+ preloader_console_init();
+
+ board_init_r(NULL, 0);
+}
+
+void reset_cpu(ulong addr)
+{
+}
+#endif
+
--
1.9.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
