Changeset 9991c47 in mainline for uspace/lib/c

Timestamp:

2011-11-13T22:18:58Z (14 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.

Location:

uspace/lib/c

Files:

• generic/device/hw_res.c (modified) (1 diff)
• include/device/hw_res.h (modified) (2 diffs)

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;
+}
+
 /** @}
  */

uspace/lib/c/include/device/hw_res.h

@@ -43 +43 @@
 typedef enum {
         HW_RES_GET_RESOURCE_LIST = 0,
-        HW_RES_ENABLE_INTERRUPT
+        HW_RES_ENABLE_INTERRUPT,
+        HW_RES_DMA_CHANNEL_SETUP,
 } hw_res_method_t;
 
@@ -105 +106 @@
 extern bool hw_res_enable_interrupt(async_sess_t *);
 
+#define DMA_MODE_WRITE (1 << 2)
+#define DMA_MODE_READ (1 << 3)
+#define DMA_MODE_AUTO (1 << 4)
+#define DMA_MODE_DOWN (1 << 5)
+#define DMA_MODE_SINGLE (1 << 6)
+#define DMA_MODE_BLOCK (1 << 7)
+#define DMA_MODE_ON_DEMAND (0)
+
+extern int hw_res_dma_channel_setup(async_sess_t *,
+    unsigned, uint32_t, uint16_t, uint8_t);
+
 #endif