Changeset 9991c47 in mainline for uspace/lib/c/generic/device/hw_res.c

Timestamp:

2011-11-13T22:18:58Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

8a5962f

Parents:

e6def65

Message:

libc, libdrv: Add support for DMA channel handling.

File:

• uspace/lib/c/generic/device/hw_res.c (modified) (1 diff)

uspace/lib/c/generic/device/hw_res.c

@@ -84 +84 @@
 }
 
+int hw_res_dma_channel_setup(async_sess_t *sess,
+    unsigned channel, uint32_t pa, uint16_t size, uint8_t mode)
+{
+        async_exch_t *exch = async_exchange_begin(sess);
+        if (exch == NULL)
+                return ENOMEM;
+        uint32_t packed = size | (mode << 16);
+        int ret = async_req_4_0(exch, DEV_IFACE_ID(HW_RES_DEV_IFACE),
+            HW_RES_DMA_CHANNEL_SETUP, channel, pa, packed);
+        async_exchange_end(exch);
+        
+        return ret;
+}
+
 /** @}
  */