drivers/am335xgpio: Add AM335x driver for bitbang support on BeagleBones

[fw/openocd] / src / jtag / drivers / ep93xx.c

diff --git a/src/jtag/drivers/ep93xx.c b/src/jtag/drivers/ep93xx.c
index 7e3b4568be8a8c553f20d716a155bea1413e8eb8..94d65505f95546274c13faeb316d9707b80044f2 100644 (file)
--- a/src/jtag/drivers/ep93xx.c
+++ b/src/jtag/drivers/ep93xx.c
@@ -13,10 +13,9 @@
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
- *   along with this program; if not, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -34,7 +33,7 @@
 
 #include <sys/mman.h>
 
-static uint8_t output_value = 0x0;
+static uint8_t output_value;
 static int dev_mem_fd;
 static void *gpio_controller;
 static volatile uint8_t *gpio_data_register;
@@ -42,42 +41,43 @@ static volatile uint8_t *gpio_data_direction_register;
 
 /* low level command set
  */
-static int ep93xx_read(void);
-static void ep93xx_write(int tck, int tms, int tdi);
-static void ep93xx_reset(int trst, int srst);
+static bb_value_t ep93xx_read(void);
+static int ep93xx_write(int tck, int tms, int tdi);
+static int ep93xx_reset(int trst, int srst);
 
-static int ep93xx_speed(int speed);
 static int ep93xx_init(void);
 static int ep93xx_quit(void);
 
 struct timespec ep93xx_zzzz;
 
-struct jtag_interface ep93xx_interface =
-{
-       .name = "ep93xx",
-
+static struct jtag_interface ep93xx_interface = {
        .supported = DEBUG_CAP_TMS_SEQ,
        .execute_queue = bitbang_execute_queue,
+};
+
+struct adapter_driver ep93xx_adapter_driver = {
+       .name = "ep93xx",
+       .transports = jtag_only,
 
-       .speed = ep93xx_speed,
        .init = ep93xx_init,
        .quit = ep93xx_quit,
+       .reset = ep93xx_reset,
+
+       .jtag_ops = &ep93xx_interface,
 };
 
-static struct bitbang_interface ep93xx_bitbang =
-{
+static struct bitbang_interface ep93xx_bitbang = {
        .read = ep93xx_read,
        .write = ep93xx_write,
-       .reset = ep93xx_reset,
        .blink = 0,
 };
 
-static int ep93xx_read(void)
+static bb_value_t ep93xx_read(void)
 {
-       return !!(*gpio_data_register & TDO_BIT);
+       return (*gpio_data_register & TDO_BIT) ? BB_HIGH : BB_LOW;
 }
 
-static void ep93xx_write(int tck, int tms, int tdi)
+static int ep93xx_write(int tck, int tms, int tdi)
 {
        if (tck)
                output_value |= TCK_BIT;
@@ -96,10 +96,12 @@ static void ep93xx_write(int tck, int tms, int tdi)
 
        *gpio_data_register = output_value;
        nanosleep(&ep93xx_zzzz, NULL);
+
+       return ERROR_OK;
 }
 
 /* (1) assert or (0) deassert reset lines */
-static void ep93xx_reset(int trst, int srst)
+static int ep93xx_reset(int trst, int srst)
 {
        if (trst == 0)
                output_value |= TRST_BIT;
@@ -113,10 +115,6 @@ static void ep93xx_reset(int trst, int srst)
 
        *gpio_data_register = output_value;
        nanosleep(&ep93xx_zzzz, NULL);
-}
-
-static int ep93xx_speed(int speed)
-{
 
        return ERROR_OK;
 }
@@ -129,7 +127,7 @@ static int set_gonk_mode(void)
        syscon = mmap(NULL, 4096, PROT_READ | PROT_WRITE,
                        MAP_SHARED, dev_mem_fd, 0x80930000);
        if (syscon == MAP_FAILED) {
-               perror("mmap");
+               LOG_ERROR("mmap: %s", strerror(errno));
                return ERROR_JTAG_INIT_FAILED;
        }
 
@@ -153,14 +151,14 @@ static int ep93xx_init(void)
 
        dev_mem_fd = open("/dev/mem", O_RDWR | O_SYNC);
        if (dev_mem_fd < 0) {
-               perror("open");
+               LOG_ERROR("open: %s", strerror(errno));
                return ERROR_JTAG_INIT_FAILED;
        }
 
        gpio_controller = mmap(NULL, 4096, PROT_READ | PROT_WRITE,
                                MAP_SHARED, dev_mem_fd, 0x80840000);
        if (gpio_controller == MAP_FAILED) {
-               perror("mmap");
+               LOG_ERROR("mmap: %s", strerror(errno));
                close(dev_mem_fd);
                return ERROR_JTAG_INIT_FAILED;
        }