Changeset 1864948 in mainline for uspace/drv/bus/isa/isa.c

Timestamp:

2012-08-18T14:24:40Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

b28dabe

Parents:

6fd365d

Message:

isa: Implement DMA remain size query.

File:

• uspace/drv/bus/isa/isa.c (modified) (1 diff)

uspace/drv/bus/isa/isa.c

@@ -169 +169 @@
 }
 
+static int isa_fun_remain_dma(ddf_fun_t *fnode,
+    unsigned channel, uint16_t *size)
+{
+        assert(size);
+        assert(fnode);
+        isa_fun_t *isa_fun = fnode->driver_data;
+        assert(isa_fun);
+        const hw_resource_list_t *res = &isa_fun->hw_resources;
+        assert(res);
+        
+        for (size_t i = 0; i < res->count; ++i) {
+                /* Check for assigned channel */
+                if (((res->resources[i].type == DMA_CHANNEL_16) &&
+                    (res->resources[i].res.dma_channel.dma16 == channel)) ||
+                    ((res->resources[i].type == DMA_CHANNEL_8) &&
+                    (res->resources[i].res.dma_channel.dma8 == channel))) {
+                        return dma_channel_remain(channel, size);
+                }
+        }
+        
+        return EINVAL;
+}
+
 static hw_res_ops_t isa_fun_hw_res_ops = {
         .get_resource_list = isa_fun_get_resources,
         .enable_interrupt = isa_fun_enable_interrupt,
         .dma_channel_setup = isa_fun_setup_dma,
+        .dma_channel_remain = isa_fun_remain_dma,
 };