X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fstlink-usb.c;h=ec4053ac7bd050bd3d4f0f91b750084902e7a94a;hb=3652f98a5d6c8bbe4707c5764b10e5bb9a13c370;hp=f0a469511d9772c8b7b6955f6b813bb3641b057e;hpb=5eda4566d617fedd2a9d3020ddae06b394d08a5f;p=fw%2Fstlink

diff --git a/src/stlink-usb.c b/src/stlink-usb.c
index f0a4695..ec4053a 100644
--- a/src/stlink-usb.c
+++ b/src/stlink-usb.c
@@ -2,9 +2,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <time.h>
+#include <sys/time.h>
 #include <sys/types.h>
-#include <libusb-1.0/libusb.h>
+#include <libusb.h>
 
 #include "stlink-common.h"
 #include "stlink-usb.h"
@@ -16,6 +16,19 @@
 #define WLOG(format, args...)         ugly_log(UWARN, LOG_TAG, format, ## args)
 #define fatal(format, args...)        ugly_log(UFATAL, LOG_TAG, format, ## args)
 
+/* code from bsd timersub.h 
+http://www.gnu-darwin.org/www001/src/ports/net/libevnet/work/libevnet-0.3.8/libnostd/bsd/sys/time/timersub.h.html
+*/
+#if !defined timersub
+#define	timersub(a, b, r) do {					\
+	(r)->tv_sec	= (a)->tv_sec - (b)->tv_sec;		\
+	(r)->tv_usec	= (a)->tv_usec - (b)->tv_usec;		\
+	if ((r)->tv_usec < 0) {					\
+		--(r)->tv_sec;					\
+		(r)->tv_usec += 1000000;			\
+	}							\
+} while (0)
+#endif
 
 enum SCSI_Generic_Direction {SG_DXFER_TO_DEV=0, SG_DXFER_FROM_DEV=0x80};
 
@@ -45,7 +58,11 @@ struct trans_ctx {
     volatile unsigned long flags;
 };
 
-static void on_trans_done(struct libusb_transfer * trans) {
+#ifndef LIBUSB_CALL
+# define LIBUSB_CALL
+#endif
+
+static void LIBUSB_CALL on_trans_done(struct libusb_transfer * trans) {
     struct trans_ctx * const ctx = trans->user_data;
 
     if (trans->status != LIBUSB_TRANSFER_COMPLETED)
@@ -127,8 +144,6 @@ ssize_t send_recv(struct stlink_libusb* handle, int terminate,
     }
     
     if ((handle->protocoll == 1) && terminate) {
-        fprintf(stderr, "This is never used....\n");
-        exit(EXIT_FAILURE);
         /* Read the SG reply */
         unsigned char sg_buf[13];
         libusb_fill_bulk_transfer
@@ -157,7 +172,6 @@ static int fill_command
     int i = 0;
     memset(cmd, 0, sizeof (sl->c_buf));
     if(slu->protocoll == 1) {
-        fprintf(stderr, "This is never used....\n");
         cmd[i++] = 'U';
         cmd[i++] = 'S';
         cmd[i++] = 'B';
@@ -189,6 +203,34 @@ void _stlink_usb_version(stlink_t *sl) {
     }
 }
 
+int32_t _stlink_usb_target_voltage(stlink_t *sl) {
+    struct stlink_libusb * const slu = sl->backend_data;
+    unsigned char* const rdata = sl->q_buf;
+    unsigned char* const cmd  = sl->c_buf;
+    ssize_t size;
+    uint32_t rep_len = 8;
+    int i = fill_command(sl, SG_DXFER_FROM_DEV, rep_len);
+    uint32_t factor, reading;
+    int voltage;
+
+    cmd[i++] = STLINK_GET_TARGET_VOLTAGE;
+
+    size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
+    if (size == -1) {
+        printf("[!] send_recv\n");
+        return -1;
+    } else if (size != 8) {
+        printf("[!] wrong length\n");
+        return -1;
+    }
+
+    factor = (rdata[3] << 24) | (rdata[2] << 16) | (rdata[1] << 8) | (rdata[0] << 0);
+    reading = (rdata[7] << 24) | (rdata[6] << 16) | (rdata[5] << 8) | (rdata[4] << 0);
+    voltage = 2400 * reading / factor;
+
+    return voltage;
+}
+
 uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
     struct stlink_libusb * const slu = sl->backend_data;
     unsigned char* const rdata = sl->q_buf;
@@ -203,7 +245,7 @@ uint32_t _stlink_usb_read_debug32(stlink_t *sl, uint32_t addr) {
     size = send_recv(slu, 1, cmd, slu->cmd_len, rdata, rep_len);
     if (size == -1) {
         printf("[!] send_recv\n");
-        return;
+        return 0;
     }
     return read_uint32(rdata, 4);
 }
@@ -562,6 +604,84 @@ void _stlink_usb_read_reg(stlink_t *sl, int r_idx, reg *regp) {
     }
 }
 
+/* See section C1.6 of the ARMv7-M Architecture Reference Manual */
+void _stlink_usb_read_unsupported_reg(stlink_t *sl, int r_idx, reg *regp) {
+    uint32_t r;
+
+    sl->q_buf[0] = (unsigned char) r_idx;
+    for (int i = 1; i < 4; i++) {
+        sl->q_buf[i] = 0;
+    }
+
+    _stlink_usb_write_mem32(sl, DCRSR, 4);
+    _stlink_usb_read_mem32(sl, DCRDR, 4);
+
+    r = read_uint32(sl->q_buf, 0);
+    DLOG("r_idx (%2d) = 0x%08x\n", r_idx, r);
+
+    switch (r_idx) {
+        case 0x14:
+            regp->primask = (uint8_t) (r & 0xFF);
+            regp->basepri = (uint8_t) ((r>>8) & 0xFF);
+            regp->faultmask = (uint8_t) ((r>>16) & 0xFF);
+            regp->control = (uint8_t) ((r>>24) & 0xFF);
+            break;
+        case 0x21:
+            regp->fpscr = r;
+            break;
+        default:
+            regp->s[r_idx - 0x40] = r;
+            break;
+    }
+}
+
+void _stlink_usb_read_all_unsupported_regs(stlink_t *sl, reg *regp) {
+    _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
+    _stlink_usb_read_unsupported_reg(sl, 0x21, regp);
+
+    for (int i = 0; i < 32; i++) {
+        _stlink_usb_read_unsupported_reg(sl, 0x40+i, regp);
+    }
+}
+
+/* See section C1.6 of the ARMv7-M Architecture Reference Manual */
+void _stlink_usb_write_unsupported_reg(stlink_t *sl, uint32_t val, int r_idx, reg *regp) {
+    if (r_idx >= 0x1C && r_idx <= 0x1F) { /* primask, basepri, faultmask, or control */
+        /* These are held in the same register */
+        _stlink_usb_read_unsupported_reg(sl, 0x14, regp);
+
+        val = (uint8_t) (val>>24);
+
+        switch (r_idx) {
+            case 0x1C:  /* control */
+                val = (((uint32_t) val) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
+                break;
+            case 0x1D:  /* faultmask */
+                val = (((uint32_t) regp->control) << 24) | (((uint32_t) val) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) regp->primask);
+                break;
+            case 0x1E:  /* basepri */
+                val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) val) << 8) | ((uint32_t) regp->primask);
+                break;
+            case 0x1F:  /* primask */
+                val = (((uint32_t) regp->control) << 24) | (((uint32_t) regp->faultmask) << 16) | (((uint32_t) regp->basepri) << 8) | ((uint32_t) val);
+                break;
+        }
+
+        r_idx = 0x14;
+    }
+
+    write_uint32(sl->q_buf, val);
+
+    _stlink_usb_write_mem32(sl, DCRDR, 4);
+
+    sl->q_buf[0] = (unsigned char) r_idx;
+    sl->q_buf[1] = 0;
+    sl->q_buf[2] = 0x01;
+    sl->q_buf[3] = 0;
+
+    _stlink_usb_write_mem32(sl, DCRSR, 4);
+}
+
 void _stlink_usb_write_reg(stlink_t *sl, uint32_t reg, int idx) {
     struct stlink_libusb * const slu = sl->backend_data;
     unsigned char* const data = sl->q_buf;
@@ -602,14 +722,18 @@ stlink_backend_t _stlink_usb_backend = {
     _stlink_usb_write_mem8,
     _stlink_usb_read_all_regs,
     _stlink_usb_read_reg,
+    _stlink_usb_read_all_unsupported_regs,
+    _stlink_usb_read_unsupported_reg,
+    _stlink_usb_write_unsupported_reg,
     _stlink_usb_write_reg,
     _stlink_usb_step,
     _stlink_usb_current_mode,
-    _stlink_usb_force_debug
+    _stlink_usb_force_debug,
+    _stlink_usb_target_voltage
 };
 
 
-stlink_t* stlink_open_usb(const int verbose) {
+stlink_t* stlink_open_usb(const int verbose, int reset) {
     stlink_t* sl = NULL;
     struct stlink_libusb* slu = NULL;
     int error = -1;
@@ -634,13 +758,50 @@ stlink_t* stlink_open_usb(const int verbose) {
         goto on_error;
     }
     
-    slu->usb_handle = libusb_open_device_with_vid_pid(slu->libusb_ctx, USB_ST_VID, USB_STLINK_32L_PID);
-    if (slu->usb_handle == NULL) {
-		// TODO - free usb context too...
-		WLOG("Couldn't find any ST-Link/V2 devices");
-        goto on_error;
+    libusb_device **list;
+    int cnt = libusb_get_device_list(slu->libusb_ctx, &list);
+    struct libusb_device_descriptor desc;
+    int devBus =0;
+    int devAddr=0;
+    
+    char *device = getenv("STLINK_DEVICE");
+    if (device) {
+	char *c = strchr(device,':');
+	if (c==NULL) {
+	    WLOG("STLINK_DEVICE must be <USB_BUS>:<USB_ADDR> format\n");
+	    goto on_error;
+	}
+	devBus=atoi(device);
+	*c++=0;
+	devAddr=atoi(c);
+	ILOG("bus %03d dev %03d\n",devBus, devAddr);
+    }
+    while (cnt){
+	cnt--;
+        libusb_get_device_descriptor( list[cnt], &desc );
+        if (desc.idVendor!=USB_ST_VID) continue;
+        if (devBus && devAddr)
+            if ((libusb_get_bus_number(list[cnt])!=devBus) || (libusb_get_device_address(list[cnt])!=devAddr)) continue;
+        if (desc.idProduct == USB_STLINK_32L_PID) break;
+        if (desc.idProduct == USB_STLINK_PID) {
+            slu->protocoll = 1;
+            break;
+        }
+    }
+    
+    if (cnt < 0) {
+	    WLOG ("Couldn't find %s ST-Link/V2 devices\n",(devBus && devAddr)?"matched":"any");
+	    goto on_error;
+    } else {
+	if( libusb_open(list[cnt], &slu->usb_handle) !=0){
+	    WLOG("Couldn't open ST-Link/V2 device %03d:%03d\n",libusb_get_bus_number(list[cnt]), libusb_get_device_address(list[cnt]));
+    	    goto on_error;
+    	}
     }
     
+    libusb_free_device_list(list, 1);
+    
+
     if (libusb_kernel_driver_active(slu->usb_handle, 0) == 1) {
         int r;
         
@@ -701,6 +862,10 @@ stlink_t* stlink_open_usb(const int verbose) {
       stlink_enter_swd_mode(sl);
     }
 
+    if (reset) {
+        stlink_reset(sl);
+    }
+    stlink_load_device_params(sl);
     stlink_version(sl);
 
     error = 0;