fc-shell TCH DL handler: add support for CSD modes TCH DL capture mechanism in FC Tourmaline firmware has been extended to support CSD modes in addition to speech - add the necessary support on the host tools side. It needs to be noted that this mechanism in its present state does NOT provide the debug utility value that was sought: as we learned only after the code was implemented, TI's DSP has a misfeature in that the buffer we are reading (a_dd_0[]) is zeroed out when the IDS block is enabled, i.e., we are reading all zeros and not the real DL bits we were after. But since the code has already been written, we are keeping it - perhaps we can do some tests with IDS disabled.

/*
 * This libpwon module implements -Petmoff mode: set the baud rate to 115200
 * and send out ETM command doing Iota poweroff, triggering a VRPC reboot cycle
 * on the USB-charging phone.  The "wakeup shot" logic is a copy of what we do
 * in rvinterf.
 */

#include <sys/types.h>
#include <unistd.h>

extern int target_fd;

static u_char wakeup_shot[64];
static u_char etm_devoff_pkt[9] =
		{0x02, 0x14, 0x01, 0x67, 0x1E, 0x01, 0x00, 0x79, 0x02};

void
bootctrl_do_etmoff()
{
	set_fixed_baudrate("115200");
	set_serial_nonblock(0);
	write(target_fd, wakeup_shot, sizeof wakeup_shot);
	usleep(100000);
	write(target_fd, etm_devoff_pkt, sizeof etm_devoff_pkt);
}