The stlink related constants kindly provided by Oliver Spencer (OpenOCD)
for use in a GPL compatible license.
- Code format ~ TAB = 8, K&R, linux kernel source, golang oriented
Tested compatibility: linux, gcc >= 4.3.3
The communication is based on standard USB mass storage device
CBW - Command Block Wrapper
CSW - Command Status Wrapper
RFU - Reserved for Future Use
- scsi_pt - SCSI pass-through
- sg - SCSI generic
- * usb-storage.quirks
+ Originally, this driver used scsi pass through commands, which required the
+ usb-storage module to be loaded, providing the /dev/sgX links. The USB mass
+ storage implementation on the STLinkv1 is however terribly broken, and it can
+ take many minutes for the kernel to give up.
+
+ However, in Nov 2011, the scsi pass through was replaced by raw libusb, so
+ instead of having to let usb-storage struggle with the device, and also greatly
+ limiting the portability of the driver, you can now tell usb-storage to simply
+ ignore this device completely.
+
+ usb-storage.quirks
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=Documentation/kernel-parameters.txt
Each entry has the form VID:PID:Flags where VID and PID are Vendor and Product
ID values (4-digit hex numbers) and Flags is a set of characters, each corresponding
Example: quirks=0419:aaf5:rl,0421:0433:rc
http://permalink.gmane.org/gmane.linux.usb.general/35053
+
+ For the stlinkv1, you just want the following
- modprobe -r usb-storage && modprobe usb-storage quirks=483:3744:l
+ modprobe -r usb-storage && modprobe usb-storage quirks=483:3744:i
Equivalently, you can add a line saying
- options usb-storage quirks=483:3744:l
+ options usb-storage quirks=483:3744:i
to your /etc/modprobe.conf or /etc/modprobe.d/local.conf (or add the "quirks=..."
part to an existing options line for usb-storage).
-
- https://wiki.kubuntu.org/Kernel/Debugging/USB explains the protocoll and
- would allow to replace the sg access to pure libusb access
*/
void _stlink_sg_read_all_regs(stlink_t *sl, reg *regp) {
struct stlink_libsg *sg = sl->backend_data;
- /* unused */
- regp = regp;
-
clear_cdb(sg);
sg->cdb_cmd_blk[1] = STLINK_DEBUG_READALLREGS;
sl->q_len = 84;
// 0-3 | 4-7 | ... | 60-63 | 64-67 | 68-71 | 72-75 | 76-79 | 80-83
// r0 | r1 | ... | r15 | xpsr | main_sp | process_sp | rw | rw2
for (int i = 0; i < 16; i++) {
- sg->reg.r[i] = read_uint32(sl->q_buf, 4 * i);
+ regp->r[i] = read_uint32(sl->q_buf, 4 * i);
if (sl->verbose > 1)
- DLOG("r%2d = 0x%08x\n", i, sg->reg.r[i]);
+ DLOG("r%2d = 0x%08x\n", i, regp->r[i]);
}
- sg->reg.xpsr = read_uint32(sl->q_buf, 64);
- sg->reg.main_sp = read_uint32(sl->q_buf, 68);
- sg->reg.process_sp = read_uint32(sl->q_buf, 72);
- sg->reg.rw = read_uint32(sl->q_buf, 76);
- sg->reg.rw2 = read_uint32(sl->q_buf, 80);
+ regp->xpsr = read_uint32(sl->q_buf, 64);
+ regp->main_sp = read_uint32(sl->q_buf, 68);
+ regp->process_sp = read_uint32(sl->q_buf, 72);
+ regp->rw = read_uint32(sl->q_buf, 76);
+ regp->rw2 = read_uint32(sl->q_buf, 80);
if (sl->verbose < 2)
return;
- DLOG("xpsr = 0x%08x\n", sg->reg.xpsr);
- DLOG("main_sp = 0x%08x\n", sg->reg.main_sp);
- DLOG("process_sp = 0x%08x\n", sg->reg.process_sp);
- DLOG("rw = 0x%08x\n", sg->reg.rw);
- DLOG("rw2 = 0x%08x\n", sg->reg.rw2);
+ DLOG("xpsr = 0x%08x\n", regp->xpsr);
+ DLOG("main_sp = 0x%08x\n", regp->main_sp);
+ DLOG("process_sp = 0x%08x\n", regp->process_sp);
+ DLOG("rw = 0x%08x\n", regp->rw);
+ DLOG("rw2 = 0x%08x\n", regp->rw2);
}
// Read an arm-core register, the index must be in the range 0..20.
sl->core_stat = STLINK_CORE_STAT_UNKNOWN;
slsg->q_addr = 0;
- /* flash memory settings */
- sl->flash_base = STM32_FLASH_BASE;
- sl->flash_size = STM32_FLASH_SIZE;
- sl->flash_pgsz = STM32_FLASH_PGSZ;
-
- /* system memory */
- sl->sys_base = STM32_SYSTEM_BASE;
- sl->sys_size = STM32_SYSTEM_SIZE;
-
- /* sram memory settings */
- sl->sram_base = STM32_SRAM_BASE;
- sl->sram_size = STM32_SRAM_SIZE;
-
return sl;
}
-
-stlink_t* stlink_v1_open(const int verbose) {
+stlink_t* stlink_v1_open_inner(const int verbose) {
ugly_init(verbose);
stlink_t *sl = stlink_open(verbose);
if (sl == NULL) {
}
stlink_version(sl);
-
if ((sl->version.st_vid != USB_ST_VID) || (sl->version.stlink_pid != USB_STLINK_PID)) {
ugly_log(UERROR, LOG_TAG,
"WTF? successfully opened, but unable to read version details. BROKEN!\n");
DLOG("Reading current mode...\n");
switch (stlink_current_mode(sl)) {
- case STLINK_DEV_MASS_MODE:
- return sl;
- case STLINK_DEV_DEBUG_MODE:
- // TODO go to mass?
+ case STLINK_DEV_MASS_MODE:
return sl;
+ case STLINK_DEV_DEBUG_MODE:
+ // TODO go to mass?
+ return sl;
+ default:
+ ILOG("Current mode unusable, trying to get back to a useful state...\n");
+ break;
}
DLOG("Attempting to exit DFU mode\n");
fputs("Error: could not open stlink device\n", stderr);
return NULL;
}
- // re-query device info
+ // re-query device info (and retest)
stlink_version(sl);
+ if ((sl->version.st_vid != USB_ST_VID) || (sl->version.stlink_pid != USB_STLINK_PID)) {
+ ugly_log(UERROR, LOG_TAG,
+ "WTF? successfully opened, but unable to read version details. BROKEN!\n");
+ return NULL;
+ }
+ return sl;
+}
+
+stlink_t* stlink_v1_open(const int verbose) {
+ stlink_t *sl = stlink_v1_open_inner(verbose);
+ if (sl == NULL) {
+ fputs("Error: could not open stlink device\n", stderr);
+ return NULL;
+ }
+ // by now, it _must_ be fully open and in a useful mode....
+ stlink_enter_swd_mode(sl);
+ stlink_load_device_params(sl);
+ ILOG("Successfully opened a stlink v1 debugger\n");
return sl;
}
projects / fw / stlink / blobdiff