1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/net/fsl_mc/mc.c b/drivers/net/fsl_mc/mc.c
new file mode 100644
index 0000000..df84568
--- /dev/null
+++ b/drivers/net/fsl_mc/mc.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#include <errno.h>
+#include <asm/io.h>
+#include <fsl_mc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+static int mc_boot_status;
+
+/**
+ * Copying MC firmware or DPL image to DDR
+ */
+static int mc_copy_image(const char *title,
+		    u64 image_addr, u32 image_size, u64 mc_ram_addr)
+{
+	debug("%s copied to address %p\n", title, (void *)mc_ram_addr);
+	memcpy((void *)mc_ram_addr, (void *)image_addr, image_size);
+	return 0;
+}
+
+/**
+ * MC firmware FIT image parser checks if the image is in FIT
+ * format, verifies integrity of the image and calculates
+ * raw image address and size values.
+ * Returns 0 if success and 1 if any of the above mentioned
+ * task fail.
+ **/
+
+int parse_mc_firmware_fit_image(const void **raw_image_addr,
+				size_t *raw_image_size)
+{
+	int format;
+	void *fit_hdr;
+	int node_offset;
+	const void *data;
+	size_t size;
+	const char *uname = "firmware";
+
+	/* Check if the image is in NOR flash*/
+#ifdef CONFIG_SYS_LS_MC_FW_IN_NOR
+	fit_hdr = (void *)CONFIG_SYS_LS_MC_FW_ADDR;
+#else
+#error "No CONFIG_SYS_LS_MC_FW_IN_xxx defined"
+#endif
+
+	/* Check if Image is in FIT format */
+	format = genimg_get_format(fit_hdr);
+
+	if (format != IMAGE_FORMAT_FIT) {
+		debug("Not a FIT image\n");
+		return 1;
+	}
+
+	if (!fit_check_format(fit_hdr)) {
+		debug("Bad FIT image format\n");
+		return 1;
+	}
+
+	node_offset = fit_image_get_node(fit_hdr, uname);
+
+	if (node_offset < 0) {
+		debug("Can not find %s subimage\n", uname);
+		return 1;
+	}
+
+	/* Verify MC firmware image */
+	if (!(fit_image_verify(fit_hdr, node_offset))) {
+		debug("Bad MC firmware hash");
+		return 1;
+	}
+
+	/* Get address and size of raw image */
+	fit_image_get_data(fit_hdr, node_offset, &data, &size);
+
+	*raw_image_addr = data;
+	*raw_image_size = size;
+
+	return 0;
+}
+
+int mc_init(bd_t *bis)
+{
+	int error = 0;
+	int timeout = 200000;
+	struct mc_ccsr_registers __iomem *mc_ccsr_regs = MC_CCSR_BASE_ADDR;
+	u64 mc_ram_addr;
+	u64 mc_dpl_offset;
+	u32 reg_gsr;
+	u32 mc_fw_boot_status;
+	void *fdt_hdr;
+	int dpl_size;
+	const void *raw_image_addr;
+	size_t raw_image_size = 0;
+
+	BUILD_BUG_ON(CONFIG_SYS_LS_MC_FW_LENGTH % 4 != 0);
+
+	/*
+	 * The MC private DRAM block was already carved at the end of DRAM
+	 * by board_init_f() using CONFIG_SYS_MEM_TOP_HIDE:
+	 */
+	if (gd->bd->bi_dram[1].start) {
+		mc_ram_addr =
+			gd->bd->bi_dram[1].start + gd->bd->bi_dram[1].size;
+	} else {
+		mc_ram_addr =
+			gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size;
+	}
+
+	/*
+	 * Management Complex cores should be held at reset out of POR.
+	 * U-boot should be the first software to touch MC. To be safe,
+	 * we reset all cores again by setting GCR1 to 0. It doesn't do
+	 * anything if they are held at reset. After we setup the firmware
+	 * we kick off MC by deasserting the reset bit for core 0, and
+	 * deasserting the reset bits for Command Portal Managers.
+	 * The stop bits are not touched here. They are used to stop the
+	 * cores when they are active. Setting stop bits doesn't stop the
+	 * cores from fetching instructions when they are released from
+	 * reset.
+	 */
+	out_le32(&mc_ccsr_regs->reg_gcr1, 0);
+	dmb();
+
+	error = parse_mc_firmware_fit_image(&raw_image_addr, &raw_image_size);
+	if (error != 0)
+		goto out;
+	/*
+	 * Load the MC FW at the beginning of the MC private DRAM block:
+	 */
+	mc_copy_image(
+		"MC Firmware",
+		(u64)raw_image_addr,
+		raw_image_size,
+		mc_ram_addr);
+
+	/*
+	 * Calculate offset in the MC private DRAM block at which the MC DPL
+	 * blob is to be placed:
+	 */
+#ifdef CONFIG_SYS_LS_MC_DRAM_DPL_OFFSET
+	BUILD_BUG_ON(
+		(CONFIG_SYS_LS_MC_DRAM_DPL_OFFSET & 0x3) != 0 ||
+		CONFIG_SYS_LS_MC_DRAM_DPL_OFFSET > 0xffffffff);
+
+	mc_dpl_offset = CONFIG_SYS_LS_MC_DRAM_DPL_OFFSET;
+#else
+	mc_dpl_offset = mc_get_dram_block_size() -
+			roundup(CONFIG_SYS_LS_MC_DPL_LENGTH, 4096);
+
+	if ((mc_dpl_offset & 0x3) != 0 || mc_dpl_offset > 0xffffffff) {
+		printf("%s: Invalid MC DPL offset: %llu\n",
+		       __func__, mc_dpl_offset);
+		error = -EINVAL;
+		goto out;
+	}
+#endif
+
+	/* Check if DPL image is in NOR flash */
+#ifdef CONFIG_SYS_LS_MC_DPL_IN_NOR
+	fdt_hdr = (void *)CONFIG_SYS_LS_MC_DPL_ADDR;
+#else
+#error "No CONFIG_SYS_LS_MC_DPL_IN_xxx defined"
+#endif
+
+	dpl_size = fdt_totalsize(fdt_hdr);
+
+	/*
+	 * Load the MC DPL blob at the far end of the MC private DRAM block:
+	 */
+	mc_copy_image(
+		"MC DPL blob",
+		(u64)fdt_hdr,
+		dpl_size,
+		mc_ram_addr + mc_dpl_offset);
+
+	debug("mc_ccsr_regs %p\n", mc_ccsr_regs);
+
+	/*
+	 * Tell MC where the MC Firmware image was loaded in DDR:
+	 */
+	out_le32(&mc_ccsr_regs->reg_mcfbalr, (u32)mc_ram_addr);
+	out_le32(&mc_ccsr_regs->reg_mcfbahr, (u32)((u64)mc_ram_addr >> 32));
+	out_le32(&mc_ccsr_regs->reg_mcfapr, MCFAPR_BYPASS_ICID_MASK);
+
+	/*
+	 * Tell MC where the DPL blob was loaded in DDR, by indicating
+	 * its offset relative to the beginning of the DDR block
+	 * allocated to the MC firmware. The MC firmware is responsible
+	 * for checking that there is no overlap between the DPL blob
+	 * and the runtime heap and stack of the MC firmware itself.
+	 *
+	 * NOTE: bits [31:2] of this offset need to be stored in bits [29:0] of
+	 * the GSR MC CCSR register. So, this offset is assumed to be 4-byte
+	 * aligned.
+	 * Care must be taken not to write 1s into bits 31 and 30 of the GSR in
+	 * this case as the SoC COP or PIC will be signaled.
+	 */
+	out_le32(&mc_ccsr_regs->reg_gsr, (u32)(mc_dpl_offset >> 2));
+
+	/*
+	 * Deassert reset and release MC core 0 to run
+	 */
+	out_le32(&mc_ccsr_regs->reg_gcr1, GCR1_P1_DE_RST | GCR1_M_ALL_DE_RST);
+	dmb();
+	debug("Polling mc_ccsr_regs->reg_gsr ...\n");
+
+	for (;;) {
+		reg_gsr = in_le32(&mc_ccsr_regs->reg_gsr);
+		mc_fw_boot_status = (reg_gsr & GSR_FS_MASK);
+		if (mc_fw_boot_status & 0x1)
+			break;
+
+		udelay(1000);	/* throttle polling */
+		if (timeout-- <= 0)
+			break;
+	}
+
+	if (timeout <= 0) {
+		printf("%s: timeout booting management complex firmware\n",
+		       __func__);
+
+		/* TODO: Get an error status from an MC CCSR register */
+		error = -ETIMEDOUT;
+		goto out;
+	}
+
+	printf("Management complex booted (boot status: %#x)\n",
+	       mc_fw_boot_status);
+
+	if (mc_fw_boot_status != 0x1) {
+		/*
+		 * TODO: Identify critical errors from the GSR register's FS
+		 * field and for those errors, set error to -ENODEV or other
+		 * appropriate errno, so that the status property is set to
+		 * failure in the fsl,dprc device tree node.
+		 */
+	}
+
+out:
+	if (error != 0)
+		mc_boot_status = -error;
+	else
+		mc_boot_status = 0;
+
+	return error;
+}
+
+int get_mc_boot_status(void)
+{
+	return mc_boot_status;
+}
+
+/**
+ * Return the actual size of the MC private DRAM block.
+ *
+ * NOTE: For now this function always returns the minimum required size,
+ * However, in the future, the actual size may be obtained from an environment
+ * variable.
+ */
+unsigned long mc_get_dram_block_size(void)
+{
+	return CONFIG_SYS_LS_MC_DRAM_BLOCK_MIN_SIZE;
+}