common:gn4124: Allow dma items to pages 0 to 254 (was only page 0).

common/gn4124.py

@@ -191,17 +191,18 @@ class CGN4124:
             self.dma_csr.wr_reg(self.R_DMA_ATTRIB, attrib)
         else:
             # write nexy DMA item(s) in host memory
-            # uses page 0 to store DMA items
+            # uses 255 pages (out of 256) to store DMA items
             # current and next item addresses are automatically set
-            if (self.dma_item_cnt*0x20) > self.PAGE_SIZE:
+            if (self.dma_item_cnt*0x20) > self.PAGE_SIZE * 255:
                 raise GN4124OperationError('Maximum number of DMA items exceeded!')
             current_item_addr = (self.dma_item_cnt-1)*0x20
             next_item_addr = (self.dma_item_cnt)*0x20
+            next_item_page = ((self.dma_item_cnt)*0x20)/0x1000
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_CARRIER_START_ADDR + current_item_addr, carrier_addr)
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_HOST_START_ADDR_L + current_item_addr, host_addr)
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_HOST_START_ADDR_H + current_item_addr, 0x0)
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_LENGTH + current_item_addr, length)
-            self.wr_reg(self.HOST_BAR, self.HOST_DMA_NEXT_ITEM_ADDR_L + current_item_addr, self.pages[0] + next_item_addr)
+            self.wr_reg(self.HOST_BAR, self.HOST_DMA_NEXT_ITEM_ADDR_L + current_item_addr, self.pages[next_item_page] + (next_item_addr & 0xFFF))
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_NEXT_ITEM_ADDR_H + current_item_addr, 0x0)
             attrib = (dma_dir << self.DMA_ATTRIB_DIR) + (last_item << self.DMA_ATTRIB_LAST)
             self.wr_reg(self.HOST_BAR, self.HOST_DMA_ATTRIB + current_item_addr, attrib)
@@ -218,7 +219,7 @@ class CGN4124:
             print("0x%02X: 0x%08X"%(addr, self.dma_csr.rd_reg(addr)))
 
         print("Items in host memory:")
-        for item in range(self.PAGE_SIZE/0x20):
+        for item in range(self.dma_item_cnt*0x20):
             print("Item %d:"%item)
             for addr in range(0x0, 0x20, 0x4):
                 print("0x%02X: 0x%08X"%(item*0x20 + addr, self.rd_reg(self.HOST_BAR, item*0x20 + addr)))