Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / common / cmd_mmc_spi.c

diff --git a/qemu/roms/u-boot/common/cmd_mmc_spi.c b/qemu/roms/u-boot/common/cmd_mmc_spi.c
new file mode 100644 (file)
index 0000000..a2138b8
--- /dev/null
+++ b/qemu/roms/u-boot/common/cmd_mmc_spi.c
@@ -0,0 +1,88 @@
+/*
+ * Command for mmc_spi setup.
+ *
+ * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <spi.h>
+
+#ifndef CONFIG_MMC_SPI_BUS
+# define CONFIG_MMC_SPI_BUS 0
+#endif
+#ifndef CONFIG_MMC_SPI_CS
+# define CONFIG_MMC_SPI_CS 1
+#endif
+/* in SPI mode, MMC speed limit is 20MHz, while SD speed limit is 25MHz */
+#ifndef CONFIG_MMC_SPI_SPEED
+# define CONFIG_MMC_SPI_SPEED 25000000
+#endif
+/* MMC and SD specs only seem to care that sampling is on the
+ * rising edge ... meaning SPI modes 0 or 3.  So either SPI mode
+ * should be legit.  We'll use mode 0 since the steady state is 0,
+ * which is appropriate for hotplugging, unless the platform data
+ * specify mode 3 (if hardware is not compatible to mode 0).
+ */
+#ifndef CONFIG_MMC_SPI_MODE
+# define CONFIG_MMC_SPI_MODE SPI_MODE_0
+#endif
+
+static int do_mmc_spi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+       uint bus = CONFIG_MMC_SPI_BUS;
+       uint cs = CONFIG_MMC_SPI_CS;
+       uint speed = CONFIG_MMC_SPI_SPEED;
+       uint mode = CONFIG_MMC_SPI_MODE;
+       char *endp;
+       struct mmc *mmc;
+
+       if (argc < 2)
+               goto usage;
+
+       cs = simple_strtoul(argv[1], &endp, 0);
+       if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
+               goto usage;
+       if (*endp == ':') {
+               if (endp[1] == 0)
+                       goto usage;
+               bus = cs;
+               cs = simple_strtoul(endp + 1, &endp, 0);
+               if (*endp != 0)
+                       goto usage;
+       }
+       if (argc >= 3) {
+               speed = simple_strtoul(argv[2], &endp, 0);
+               if (*argv[2] == 0 || *endp != 0)
+                       goto usage;
+       }
+       if (argc >= 4) {
+               mode = simple_strtoul(argv[3], &endp, 16);
+               if (*argv[3] == 0 || *endp != 0)
+                       goto usage;
+       }
+       if (!spi_cs_is_valid(bus, cs)) {
+               printf("Invalid SPI bus %u cs %u\n", bus, cs);
+               return 1;
+       }
+
+       mmc = mmc_spi_init(bus, cs, speed, mode);
+       if (!mmc) {
+               printf("Failed to create MMC Device\n");
+               return 1;
+       }
+       printf("%s: %d at %u:%u hz %u mode %u\n", mmc->cfg->name, mmc->block_dev.dev,
+              bus, cs, speed, mode);
+       mmc_init(mmc);
+       return 0;
+
+usage:
+       return CMD_RET_USAGE;
+}
+
+U_BOOT_CMD(
+       mmc_spi,        4,      0,      do_mmc_spi,
+       "mmc_spi setup",
+       "[bus:]cs [hz] [mode]   - setup mmc_spi device"
+);