Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@xxxxxxxxxxxx>
---
drivers/mci/atmel_mci.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c
index 21c314c..b9b0668 100644
--- a/drivers/mci/atmel_mci.c
+++ b/drivers/mci/atmel_mci.c
@@ -37,6 +37,7 @@ struct atmel_mci {
struct mci_cmd *cmd;
struct mci_data *data;
unsigned slot_b;
+ int version;
};
#define to_mci_host(mci) container_of(mci, struct atmel_mci, mci)
@@ -426,6 +427,34 @@ static void atmci_info(struct device_d *mci_dev)
}
#endif /* CONFIG_MCI_INFO */
+/*
+ * HSMCI (High Speed MCI) module is not fully compatible with MCI module.
+ * HSMCI provides DMA support and a new config register but no more supports
+ * PDC.
+ */
+static void atmci_get_cap(struct atmel_mci *host)
+{
+ unsigned int version;
+
+ version = atmci_readl(host, ATMCI_VERSION) & 0x00000fff;
+ host->version = version;
+
+ dev_info(host->hw_dev, "version: 0x%x\n", version);
+
+ switch (version & 0xf00) {
+ case 0x500:
+ case 0x400:
+ case 0x300:
+ case 0x200:
+ case 0x100:
+ case 0x0:
+ break;
+ default:
+ dev_warn(host->hw_dev,
+ "Unmanaged mci version, set minimum capabilities\n");
+ break;
+ }
+}
static int atmci_probe(struct device_d *hw_dev)
{
@@ -438,6 +467,7 @@ static int atmci_probe(struct device_d *hw_dev)
return -EINVAL;
}
+
host = xzalloc(sizeof(*host));
host->mci.send_cmd = atmci_request;
host->mci.set_ios = atmci_set_ios;
@@ -467,6 +497,8 @@ static int atmci_probe(struct device_d *hw_dev)
host->mci.f_min = clk_rate >> 9;
host->mci.f_max = clk_rate >> 1;
+ atmci_get_cap(host);
+
mci_register(&host->mci);
return 0;
--
1.7.10.4
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