hla: move memory read/write functionality to driver

[openocd.git] / src / jtag / drivers / ti_icdi_usb.c

diff --git a/src/jtag/drivers/ti_icdi_usb.c b/src/jtag/drivers/ti_icdi_usb.c
index ae2f240fc58e9053d687c7efbae839b841439dc8..0d7d943bede0ed04734930860b4c3bb152d34b68 100644 (file)
--- a/src/jtag/drivers/ti_icdi_usb.c
+++ b/src/jtag/drivers/ti_icdi_usb.c
@@ -53,6 +53,7 @@ struct icdi_usb_handle_s {
        char *write_buffer;
        int max_packet;
        int read_count;
+       uint32_t max_rw_packet; /* max X packet (read/write memory) transfers */
 };
 
 static int icdi_usb_read_mem(void *handle, uint32_t addr, uint32_t size,
@@ -592,17 +593,57 @@ static int icdi_usb_write_mem_int(void *handle, uint32_t addr, uint32_t len, con
 static int icdi_usb_read_mem(void *handle, uint32_t addr, uint32_t size,
                uint32_t count, uint8_t *buffer)
 {
-       if (size == 4)
-               count *= size;
-       return icdi_usb_read_mem_int(handle, addr, count, buffer);
+       int retval = ERROR_OK;
+       struct icdi_usb_handle_s *h = (struct icdi_usb_handle_s *)handle;
+       uint32_t bytes_remaining;
+
+       /* calculate byte count */
+       count *= size;
+
+       while (count) {
+
+               bytes_remaining = h->max_rw_packet;
+               if (count < bytes_remaining)
+                       bytes_remaining = count;
+
+               retval = icdi_usb_read_mem_int(handle, addr, bytes_remaining, buffer);
+               if (retval != ERROR_OK)
+                       return retval;
+
+               buffer += bytes_remaining;
+               addr += bytes_remaining;
+               count -= bytes_remaining;
+       }
+
+       return retval;
 }
 
 static int icdi_usb_write_mem(void *handle, uint32_t addr, uint32_t size,
                uint32_t count, const uint8_t *buffer)
 {
-       if (size == 4)
-               count *= size;
-       return icdi_usb_write_mem_int(handle, addr, count, buffer);
+       int retval = ERROR_OK;
+       struct icdi_usb_handle_s *h = (struct icdi_usb_handle_s *)handle;
+       uint32_t bytes_remaining;
+
+       /* calculate byte count */
+       count *= size;
+
+       while (count) {
+
+               bytes_remaining = h->max_rw_packet;
+               if (count < bytes_remaining)
+                       bytes_remaining = count;
+
+               retval = icdi_usb_write_mem_int(handle, addr, bytes_remaining, buffer);
+               if (retval != ERROR_OK)
+                       return retval;
+
+               buffer += bytes_remaining;
+               addr += bytes_remaining;
+               count -= bytes_remaining;
+       }
+
+       return retval;
 }
 
 static int icdi_usb_close(void *handle)
@@ -707,7 +748,7 @@ static int icdi_usb_open(struct hl_interface_param_s *param, void **fd)
         * as we are using gdb binary packets to transfer memory we have to
         * reserve half the buffer for any possible escape chars plus
         * at least 64 bytes for the gdb packet header */
-       param->max_buffer = (((h->max_packet - 64) / 4) * 4) / 2;
+       h->max_rw_packet = (((h->max_packet - 64) / 4) * 4) / 2;
 
        return ERROR_OK;