stlink: add STLINK_F_HAS_SWD_SET_FREQ

Change-Id: Ibba786c7e18bf15a04b85a2071c79f631a252ccf
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4709
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
Tested-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/jtag/drivers/stlink_usb.c b/src/jtag/drivers/stlink_usb.c
index a0ee44c44ac7cc369bc3479f56e64dc1d3cabb21..566c3bdbd647c3ddb127bf03e6173ef2da50602a 100644 (file)
--- a/src/jtag/drivers/stlink_usb.c
+++ b/src/jtag/drivers/stlink_usb.c
@@ -278,6 +278,7 @@ enum stlink_mode {
  * version of stlink
  */
 #define STLINK_F_HAS_TRACE              (1UL << 0)
+#define STLINK_F_HAS_SWD_SET_FREQ       (1UL << 1)
 
 /* aliases */
 #define STLINK_F_HAS_TARGET_VOLT        STLINK_F_HAS_TRACE
@@ -674,6 +675,10 @@ static int stlink_usb_version(void *handle)
                if (h->version.jtag >= 13)
                        flags |= STLINK_F_HAS_TRACE;
 
+               /* API to set SWD frequency from J22 */
+               if (h->version.jtag >= 22)
+                       flags |= STLINK_F_HAS_SWD_SET_FREQ;
+
                break;
        default:
                break;
@@ -729,8 +734,7 @@ static int stlink_usb_set_swdclk(void *handle, uint16_t clk_divisor)
 
        assert(handle != NULL);
 
-       /* only supported by stlink/v2 and for firmware >= 22 */
-       if (h->version.stlink == 1 || h->version.jtag < 22)
+       if (!(h->version.flags & STLINK_F_HAS_SWD_SET_FREQ))
                return ERROR_COMMAND_NOTFOUND;
 
        stlink_usb_init_buffer(handle, h->rx_ep, 2);
@@ -2115,8 +2119,8 @@ static int stlink_speed_swd(void *handle, int khz, bool query)
        int speed_index;
        struct stlink_usb_handle_s *h = handle;
 
-       /* only supported by stlink/v2 and for firmware >= 22 */
-       if (h->version.stlink == 1 || h->version.jtag < 22)
+       /* old firmware cannot change it */
+       if (!(h->version.flags & STLINK_F_HAS_SWD_SET_FREQ))
                return khz;
 
        speed_index = stlink_match_speed_map(stlink_khz_to_speed_map_swd,
@@ -2397,8 +2401,7 @@ static int stlink_usb_open(struct hl_interface_param_s *param, void **fd)
                        stlink_speed(h, param->initial_interface_speed, false);
                }
        } else if (h->transport == HL_TRANSPORT_SWD) {
-               /* clock speed only supported by stlink/v2 and for firmware >= 22 */
-               if (h->version.stlink >= 2 && h->version.jtag >= 22) {
+               if (h->version.flags & STLINK_F_HAS_SWD_SET_FREQ) {
                        stlink_dump_speed_map(stlink_khz_to_speed_map_swd, ARRAY_SIZE(stlink_khz_to_speed_map_swd));
                        stlink_speed(h, param->initial_interface_speed, false);
                }