1 files changed, 68 insertions, 13 deletions

diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
index eb69aed..8076761 100644
--- a/drivers/mmc/socfpga_dw_mmc.c
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -6,6 +6,8 @@
 
 #include <common.h>
 #include <malloc.h>
+#include <fdtdec.h>
+#include <libfdt.h>
 #include <dwmmc.h>
 #include <errno.h>
 #include <asm/arch/dwmmc.h>
@@ -42,34 +44,87 @@ static void socfpga_dwmci_clksel(struct dwmci_host *host)
 		CLKMGR_PERPLLGRP_EN_SDMMCCLK_MASK);
 }
 
-int socfpga_dwmmc_init(u32 regbase, int bus_width, int index)
+static int socfpga_dwmci_of_probe(const void *blob, int node, const int idx)
 {
+	/* FIXME: probe from DT eventually too/ */
+	const unsigned long clk = cm_get_mmc_controller_clk_hz();
+
 	struct dwmci_host *host;
-	unsigned long clk = cm_get_mmc_controller_clk_hz();
+	fdt_addr_t reg_base;
+	int bus_width, fifo_depth;
 
 	if (clk == 0) {
-		printf("%s: MMC clock is zero!", __func__);
+		printf("DWMMC%d: MMC clock is zero!", idx);
 		return -EINVAL;
 	}
 
-	/* calloc for zero init */
-	host = calloc(1, sizeof(struct dwmci_host));
-	if (!host) {
-		printf("%s: calloc() failed!\n", __func__);
-		return -ENOMEM;
+	/* Get the register address from the device node */
+	reg_base = fdtdec_get_addr(blob, node, "reg");
+	if (!reg_base) {
+		printf("DWMMC%d: Can't get base address\n", idx);
+		return -EINVAL;
+	}
+
+	/* Get the bus width from the device node */
+	bus_width = fdtdec_get_int(blob, node, "bus-width", 0);
+	if (bus_width <= 0) {
+		printf("DWMMC%d: Can't get bus-width\n", idx);
+		return -EINVAL;
 	}
 
+	fifo_depth = fdtdec_get_int(blob, node, "fifo-depth", 0);
+	if (fifo_depth < 0) {
+		printf("DWMMC%d: Can't get FIFO depth\n", idx);
+		return -EINVAL;
+	}
+
+	/* Allocate the host */
+	host = calloc(1, sizeof(*host));
+	if (!host)
+		return -ENOMEM;
+
 	host->name = "SOCFPGA DWMMC";
-	host->ioaddr = (void *)regbase;
+	host->ioaddr = (void *)reg_base;
 	host->buswidth = bus_width;
 	host->clksel = socfpga_dwmci_clksel;
-	host->dev_index = index;
-	/* fixed clock divide by 4 which due to the SDMMC wrapper */
+	host->dev_index = idx;
+	/* Fixed clock divide by 4 which due to the SDMMC wrapper */
 	host->bus_hz = clk;
 	host->fifoth_val = MSIZE(0x2) |
-		RX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2 - 1) |
-		TX_WMARK(CONFIG_SOCFPGA_DWMMC_FIFO_DEPTH / 2);
+		RX_WMARK(fifo_depth / 2 - 1) | TX_WMARK(fifo_depth / 2);
 
 	return add_dwmci(host, host->bus_hz, 400000);
 }
 
+static int socfpga_dwmci_process_node(const void *blob, int nodes[],
+				      int count)
+{
+	int i, node, ret;
+
+	for (i = 0; i < count; i++) {
+		node = nodes[i];
+		if (node <= 0)
+			continue;
+
+		ret = socfpga_dwmci_of_probe(blob, node, i);
+		if (ret) {
+			printf("%s: failed to decode dev %d\n", __func__, i);
+			return ret;
+		}
+	}
+	return 0;
+}
+
+int socfpga_dwmmc_init(const void *blob)
+{
+	int nodes[2];	/* Max. two controllers. */
+	int ret, count;
+
+	count = fdtdec_find_aliases_for_id(blob, "mmc",
+					   COMPAT_ALTERA_SOCFPGA_DWMMC,
+					   nodes, ARRAY_SIZE(nodes));
+
+	ret = socfpga_dwmci_process_node(blob, nodes, count);
+
+	return ret;
+}