Add MMC Framework

Here's a new framework (based roughly off the linux one) for managing
MMC controllers.  It handles all of the standard SD/MMC transactions,
leaving the host drivers to implement only what is necessary to
deal with their specific hardware.

This also hooks the infrastructure into the PowerPC board code
(similar to how the ethernet infrastructure now hooks in)

Some of this code was contributed by Dave Liu <daveliu@freescale.com>

Signed-off-by: Andy Fleming <afleming@freescale.com>

1 files changed, 132 insertions, 0 deletions

diff --git a/common/cmd_mmc.c b/common/cmd_mmc.c
index 75a75e52e..71f4971f4 100644
--- a/common/cmd_mmc.c
+++ b/common/cmd_mmc.c
@@ -25,6 +25,7 @@
 #include <command.h>
 #include <mmc.h>
 
+#ifndef CONFIG_GENERIC_MMC
 int do_mmc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 {
 	if (mmc_legacy_init (1) != 0) {
@@ -39,3 +40,134 @@ U_BOOT_CMD(
 	"init mmc card",
 	NULL
 );
+#endif /* !CONFIG_GENERIC_MMC */
+
+static void print_mmcinfo(struct mmc *mmc)
+{
+	printf("Device: %s\n", mmc->name);
+	printf("Manufacturer ID: %x\n", mmc->cid[0] >> 24);
+	printf("OEM: %x\n", (mmc->cid[0] >> 8) & 0xffff);
+	printf("Name: %c%c%c%c%c \n", mmc->cid[0] & 0xff,
+			(mmc->cid[1] >> 24), (mmc->cid[1] >> 16) & 0xff,
+			(mmc->cid[1] >> 8) & 0xff, mmc->cid[1] & 0xff);
+
+	printf("Tran Speed: %d\n", mmc->tran_speed);
+	printf("Rd Block Len: %d\n", mmc->read_bl_len);
+
+	printf("%s version %d.%d\n", IS_SD(mmc) ? "SD" : "MMC",
+			(mmc->version >> 4) & 0xf, mmc->version & 0xf);
+
+	printf("High Capacity: %s\n", mmc->high_capacity ? "Yes" : "No");
+	printf("Capacity: %lld\n", mmc->capacity);
+
+	printf("Bus Width: %d-bit\n", mmc->bus_width);
+}
+
+int do_mmcinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	struct mmc *mmc;
+	int dev_num;
+
+	if (argc < 2)
+		dev_num = 0;
+	else
+		dev_num = simple_strtoul(argv[1], NULL, 0);
+
+	mmc = find_mmc_device(dev_num);
+
+	if (mmc) {
+		mmc_init(mmc);
+
+		print_mmcinfo(mmc);
+	}
+
+	return 0;
+}
+
+U_BOOT_CMD(mmcinfo, 2, 0, do_mmcinfo, "mmcinfo <dev num>-- display MMC info\n",
+		NULL);
+
+int do_mmcops(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+	int rc = 0;
+
+	switch (argc) {
+	case 3:
+		if (strcmp(argv[1], "rescan") == 0) {
+			int dev = simple_strtoul(argv[2], NULL, 10);
+			struct mmc *mmc = find_mmc_device(dev);
+
+			mmc_init(mmc);
+
+			return 0;
+		}
+
+	case 0:
+	case 1:
+	case 4:
+		printf("Usage:\n%s\n", cmdtp->usage);
+		return 1;
+
+	case 2:
+		if (!strcmp(argv[1], "list")) {
+			print_mmc_devices('\n');
+			return 0;
+		}
+		return 1;
+	default: /* at least 5 args */
+		if (strcmp(argv[1], "read") == 0) {
+			int dev = simple_strtoul(argv[2], NULL, 10);
+			void *addr = (void *)simple_strtoul(argv[3], NULL, 16);
+			u32 cnt = simple_strtoul(argv[5], NULL, 16);
+			u32 n;
+			u32 blk = simple_strtoul(argv[4], NULL, 16);
+			struct mmc *mmc = find_mmc_device(dev);
+
+			printf("\nMMC read: dev # %d, block # %d, count %d ... ",
+				dev, blk, cnt);
+
+			mmc_init(mmc);
+
+			n = mmc->block_dev.block_read(dev, blk, cnt, addr);
+
+			/* flush cache after read */
+			flush_cache((ulong)addr, cnt * 512); //FIXME
+
+			printf("%d blocks read: %s\n",
+				n, (n==cnt) ? "OK" : "ERROR");
+			return (n == cnt) ? 0 : 1;
+		} else if (strcmp(argv[1], "write") == 0) {
+			int dev = simple_strtoul(argv[2], NULL, 10);
+			void *addr = (void *)simple_strtoul(argv[3], NULL, 16);
+			u32 cnt = simple_strtoul(argv[5], NULL, 16);
+			u32 n;
+			struct mmc *mmc = find_mmc_device(dev);
+
+			int blk = simple_strtoul(argv[4], NULL, 16);
+
+			printf("\nMMC write: dev # %d, block # %d, count %d ... ",
+				dev, blk, cnt);
+
+			mmc_init(mmc);
+
+			n = mmc->block_dev.block_write(dev, blk, cnt, addr);
+
+			printf("%d blocks written: %s\n",
+				n, (n == cnt) ? "OK" : "ERROR");
+			return (n == cnt) ? 0 : 1;
+		} else {
+			printf("Usage:\n%s\n", cmdtp->usage);
+			rc = 1;
+		}
+
+		return rc;
+	}
+}
+
+U_BOOT_CMD(
+	mmc, 6, 1, do_mmcops,
+	"mmc	- MMC sub system\n",
+	"mmc read <device num> addr blk# cnt\n"
+	"mmc write <device num> addr blk# cnt\n"
+	"mmc rescan <device num>\n"
+	"mmc list - lists available devices\n");