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authorGareth McMullin2011-02-10 15:24:54 +1300
committerGareth McMullin2011-02-10 15:24:54 +1300
commitf293cc4bc19409ac77287f0e7298801d55e42b11 (patch)
tree9ba934556c5de1fea4568d2186869c8a6ae0879d /src/linux/platform.c
parentd1cf80db33340b7004c02b37148127b8b58c687c (diff)
Improved Linux/libftdi platform support.
Tested with Floss-JTAG. SWD working.
Diffstat (limited to 'src/linux/platform.c')
-rw-r--r--src/linux/platform.c88
1 files changed, 87 insertions, 1 deletions
diff --git a/src/linux/platform.c b/src/linux/platform.c
index c18d8a6..e526578 100644
--- a/src/linux/platform.c
+++ b/src/linux/platform.c
@@ -18,6 +18,92 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "platform.h"
+#include "gdb_if.h"
+#include "jtag_scan.h"
-int platform_init(void) { return 0; }
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+struct ftdi_context *ftdic;
+
+#define BUF_SIZE 4096
+static uint8_t outbuf[BUF_SIZE];
+static uint16_t bufptr = 0;
+
+int platform_init(void)
+{
+ int err;
+
+ if(ftdic) {
+ ftdi_usb_close(ftdic);
+ ftdi_free(ftdic);
+ ftdic = NULL;
+ }
+ if((ftdic = ftdi_new()) == NULL) {
+ fprintf(stderr, "ftdi_new: %s\n",
+ ftdi_get_error_string(ftdic));
+ abort();
+ }
+ if((err = ftdi_set_interface(ftdic, INTERFACE_A)) != 0) {
+ fprintf(stderr, "ftdi_set_interface: %d: %s\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+ if((err = ftdi_usb_open(ftdic, FT2232_VID, FT2232_PID)) != 0) {
+ fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+
+ if((err = ftdi_set_latency_timer(ftdic, 1)) != 0) {
+ fprintf(stderr, "ftdi_set_latency_timer: %d: %s\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+ if((err = ftdi_set_baudrate(ftdic, 1000000)) != 0) {
+ fprintf(stderr, "ftdi_set_baudrate: %d: %s\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+ if((err = ftdi_usb_purge_buffers(ftdic)) != 0) {
+ fprintf(stderr, "ftdi_set_baudrate: %d: %s\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+ if((err = ftdi_write_data_set_chunksize(ftdic, BUF_SIZE)) != 0) {
+ fprintf(stderr, "ftdi_write_data_set_chunksize: %d: %s\n",
+ err, ftdi_get_error_string(ftdic));
+ abort();
+ }
+
+ assert(gdb_if_init() == 0);
+
+ jtag_scan();
+
+ return 0;
+}
+
+void platform_buffer_flush(void)
+{
+ assert(ftdi_write_data(ftdic, outbuf, bufptr) == bufptr);
+// printf("FT2232 platform_buffer flush: %d bytes\n", bufptr);
+ bufptr = 0;
+}
+
+int platform_buffer_write(const uint8_t *data, int size)
+{
+ if((bufptr + size) / BUF_SIZE > 0) platform_buffer_flush();
+ memcpy(outbuf + bufptr, data, size);
+ bufptr += size;
+ return size;
+}
+
+int platform_buffer_read(uint8_t *data, int size)
+{
+ int index = 0;
+ platform_buffer_flush();
+ while((index += ftdi_read_data(ftdic, data + index, size-index)) != size);
+ return size;
+}