summaryrefslogtreecommitdiff
path: root/drivers/mmc/hi6220_dw_mmc.c
diff options
context:
space:
mode:
authorPeter Griffin <peter.griffin@linaro.org>2015-07-30 18:55:22 +0100
committerTom Rini <trini@konsulko.com>2015-08-12 20:48:01 -0400
commit447da58b576db418080867183f31a6957ccbbd7a (patch)
treed72ac4bba1f12ec6be3f94c2f9c085edf1e95776 /drivers/mmc/hi6220_dw_mmc.c
parent242b2f0c7adc932196e91e922ce4980d31800b0c (diff)
mmc: hi6220_dw_mmc: Add hi6220 glue code for dw_mmc controller.
This patch adds the glue code for hi6220 SoC which has 2x synopsis dw_mmc controllers. This will be used by the hikey board support in subsequent patches. Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/mmc/hi6220_dw_mmc.c')
-rw-r--r--drivers/mmc/hi6220_dw_mmc.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/mmc/hi6220_dw_mmc.c b/drivers/mmc/hi6220_dw_mmc.c
new file mode 100644
index 0000000000..731458c18c
--- /dev/null
+++ b/drivers/mmc/hi6220_dw_mmc.c
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2015 Linaro
+ * peter.griffin <peter.griffin@linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dwmmc.h>
+#include <malloc.h>
+#include <asm-generic/errno.h>
+
+#define DWMMC_MAX_CH_NUM 4
+
+#define DWMMC_MAX_FREQ 50000000
+#define DWMMC_MIN_FREQ 400000
+
+/* Source clock is configured to 100MHz by ATF bl1*/
+#define MMC0_DEFAULT_FREQ 100000000
+
+static int hi6220_dwmci_core_init(struct dwmci_host *host, int index)
+{
+ host->name = "HiKey DWMMC";
+
+ host->dev_index = index;
+
+ /* Add the mmc channel to be registered with mmc core */
+ if (add_dwmci(host, DWMMC_MAX_FREQ, DWMMC_MIN_FREQ)) {
+ printf("DWMMC%d registration failed\n", index);
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * This function adds the mmc channel to be registered with mmc core.
+ * index - mmc channel number.
+ * regbase - register base address of mmc channel specified in 'index'.
+ * bus_width - operating bus width of mmc channel specified in 'index'.
+ */
+int hi6220_dwmci_add_port(int index, u32 regbase, int bus_width)
+{
+ struct dwmci_host *host = NULL;
+
+ host = calloc(1, sizeof(struct dwmci_host));
+ if (!host) {
+ error("dwmci_host calloc failed!\n");
+ return -ENOMEM;
+ }
+
+ host->ioaddr = (void *)regbase;
+ host->buswidth = bus_width;
+ host->bus_hz = MMC0_DEFAULT_FREQ;
+
+ return hi6220_dwmci_core_init(host, index);
+}