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usb_linux.c
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usb_linux.c
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/*
Copyright 2023 Quectel Wireless Solutions Co.,Ltd
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "qlog.h"
#include "getopt.h"
#include <sys/statfs.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
extern char g_platform_choice[16];
extern int qlog_ignore_exx00u_ap;
extern char modem_name_para[32];
extern int qlog_read_nmea_log;
extern int secboot_debug_mode;
struct ql_usb_device_info s_usb_device_info[MAX_USB_DEV];
struct usbfs_getdriver
{
unsigned int interface;
char driver[256];
};
struct usbfs_ioctl
{
int ifno; /* interface 0..N ; negative numbers reserved */
int ioctl_code; /* MUST encode size + direction of data so the
* macros in <asm/ioctl.h> give correct values */
void *data; /* param buffer (in, or out) */
};
#define IOCTL_USBFS_DISCONNECT _IO('U', 22)
#define IOCTL_USBFS_CONNECT _IO('U', 23)
static int usbfs_is_kernel_driver_alive(int fd, int ifnum)
{
struct usbfs_getdriver getdrv;
getdrv.interface = ifnum;
if (ioctl(fd, USBDEVFS_GETDRIVER, &getdrv) < 0)
{
if (errno != ENODATA)
qlog_dbg("%s ioctl USBDEVFS_GETDRIVER on interface %d failed, kernel driver may be inactive\n", __func__, ifnum);
return 0;
}
qlog_dbg("%s find interface %d has match the driver %s\n", __func__, ifnum, getdrv.driver);
return 1;
}
static void usbfs_detach_kernel_driver(int fd, int ifnum)
{
struct usbfs_ioctl operate;
operate.data = NULL;
operate.ifno = ifnum;
operate.ioctl_code = IOCTL_USBFS_DISCONNECT;
if (ioctl(fd, USBDEVFS_IOCTL, &operate) < 0)
qlog_dbg("%s detach kernel driver failed\n", __func__);
else
qlog_dbg("%s detach kernel driver success\n", __func__);
}
static int get_value_from_file(const char *fname, int base)
{
char buff[64] = {'\0'};
int fd = open(fname, O_RDONLY);
if (fd < 0)
{
if (errno != ENOENT)
qlog_dbg("Fail to open %s, errno: %d (%s)\n", fname, errno, strerror(errno));
return -1;
}
if (read(fd, buff, sizeof(buff)) == -1)
{
}
close(fd);
return strtoul(buff, NULL, base);
}
static int strStartsWith(const char *line, const char *prefix)
{
for (; *line != '\0' && *prefix != '\0'; line++, prefix++)
{
if (*line != *prefix)
{
return 0;
}
}
return *prefix == '\0';
}
static const char *get_value_from_uevent(const char *uevent, const char *key)
{
FILE *fp;
static char line[256];
fp = fopen(uevent, "r");
if (fp == NULL)
{
qlog_dbg("fail to fopen %s, errno: %d (%s)\n", uevent, errno, strerror(errno));
return "-1";
}
// dbg_time("%s\n", uevent);
while (fgets(line, sizeof(line), fp))
{
if (line[strlen(line) - 1] == '\n' || line[strlen(line) - 1] == '\r')
{
line[strlen(line) - 1] = '\0';
}
// dbg_time("%s\n", line);
if (strStartsWith(line, key) && line[strlen(key)] == '=')
{
fclose(fp);
return &line[strlen(key) + 1];
}
}
fclose(fp);
return "-1";
}
static void ql_get_dm_major_and_minor(const char *devname, struct ql_usb_device_info *ql_dev)
{
char devpath[256];
if (devname[0] == '\0')
return;
snprintf(devpath, sizeof(devpath), "/sys/class/tty/%.27s/uevent", devname + strlen("/dev/"));
if (access(devpath, F_OK) && errno == ENOENT)
return;
ql_dev->dm_major = atoi(get_value_from_uevent(devpath, "MAJOR"));
ql_dev->dm_minor = atoi(get_value_from_uevent(devpath, "MINOR"));
}
int ql_match_dm_device(const char *devname, struct ql_usb_device_info *ql_dev)
{
struct stat buf;
if (!stat(devname, &buf) && (int)major(buf.st_rdev) == ql_dev->dm_major && (int)minor(buf.st_rdev) == ql_dev->dm_minor)
{
snprintf(ql_dev->ttyDM, sizeof(ql_dev->ttyDM), "%.31s", devname);
return 0;
}
return 1;
}
static void ql_find_usb_interface_info(const char *intfpath, struct ql_usb_interface_info *pIntf)
{
DIR *dev_dir = NULL;
struct dirent *dev = NULL;
char devpath[256 + 32];
dev_dir = opendir(intfpath);
if (!dev_dir)
{
qlog_dbg("fail to opendir('%s'), errno: %d (%s)\n", intfpath, errno, strerror(errno));
return;
}
while (NULL != (dev = readdir(dev_dir)))
{
if (!strncasecmp(dev->d_name, "ep_", 3))
{
int ep = strtoul(&dev->d_name[3], NULL, 16);
if (ep & 0x80)
pIntf->ep_in = ep;
else
pIntf->ep_out = ep;
}
}
closedir(dev_dir);
snprintf(devpath, sizeof(devpath), "%.256s/bInterfaceClass", intfpath);
pIntf->bInterfaceClass = get_value_from_file(devpath, 16);
snprintf(devpath, sizeof(devpath), "%.256s/bInterfaceSubClass", intfpath);
pIntf->bInterfaceSubClass = get_value_from_file(devpath, 16);
snprintf(devpath, sizeof(devpath), "%.256s/bInterfaceProtocol", intfpath);
pIntf->bInterfaceProtocol = get_value_from_file(devpath, 16);
snprintf(devpath, sizeof(devpath), "%.256s/bNumEndpoints", intfpath);
pIntf->bNumEndpoints = get_value_from_file(devpath, 16);
}
static void ql_find_tty_info(const char *intfpath, char *ttyport, size_t len)
{
DIR *dev_dir = NULL;
struct dirent *dev = NULL;
char devpath[256];
int wait_tty_register = 10;
ttyport[0] = '\0';
_scan_tty:
// find tty device
dev_dir = opendir(intfpath);
if (!dev_dir)
{
qlog_dbg("fail to opendir('%s'), errno: %d (%s)\n", intfpath, errno, strerror(errno));
return;
}
while (NULL != (dev = readdir(dev_dir)))
{
if (!strncasecmp(dev->d_name, "tty", 3))
{
snprintf(ttyport, len, "/dev/%.16s", dev->d_name);
break;
}
}
closedir(dev_dir);
if (!strcmp(ttyport, "/dev/tty"))
{ // find tty not ttyUSBx or ttyACMx
snprintf(devpath, sizeof(devpath), "%.128s/tty", intfpath);
dev_dir = opendir(devpath);
if (dev_dir)
{
while (NULL != (dev = readdir(dev_dir)))
{
if (!strncasecmp(dev->d_name, "tty", 3))
{
snprintf(ttyport, len, "/dev/%.16s", dev->d_name);
break;
}
}
closedir(dev_dir);
}
}
if (ttyport[0] == '\0' && wait_tty_register)
{
usleep(100 * 1000); // maybe other files not ready
wait_tty_register--;
goto _scan_tty;
}
}
int ql_find_quectel_modules(void)
{
DIR *usb_dir = NULL;
struct dirent *usb = NULL;
const char *usbpath = "/sys/bus/usb/devices";
struct ql_usb_device_info ql_dev;
int modules_num = 0;
usb_dir = opendir(usbpath);
if (NULL == usb_dir)
return modules_num;
while (NULL != (usb = readdir(usb_dir)))
{
char devpath[256] = {'\0'};
if (usb->d_name[0] == '.' || usb->d_name[0] == 'u')
continue;
memset(&ql_dev, 0, sizeof(struct ql_usb_device_info));
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/idVendor", usbpath, usb->d_name);
ql_dev.idVendor = get_value_from_file(devpath, 16);
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/idProduct", usbpath, usb->d_name);
ql_dev.idProduct = get_value_from_file(devpath, 16);
if ((ql_dev.idVendor == 0x3763 && ql_dev.idProduct == 0x3c93) || (ql_dev.idVendor == 0x3c93 && ql_dev.idProduct == 0xffff))
{
if (!modem_name_para[0])
{
printf("The state grid module needs to specify the module, like -g EC200T\n");
closedir(usb_dir);
return modules_num;
}
}
if ( !((ql_dev.idVendor == 0x05c6 && ql_dev.idProduct == 0x9003) // UC15
|| (ql_dev.idVendor == 0x05c6 && ql_dev.idProduct == 0x9090) // UC20
|| (ql_dev.idVendor == 0x05c6 && ql_dev.idProduct == 0x9215) // EC20
|| (ql_dev.idVendor == 0x05c6 && ql_dev.idProduct == 0x90db) // sdx12
|| (ql_dev.idVendor == 0x3763 && ql_dev.idProduct == 0x3c93) // GW qualcomm
|| (ql_dev.idVendor == 0x3c93 && ql_dev.idProduct == 0xffff) // GW qualcomm
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x6008) // SDX12-EM061KGL
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x6009) // SDX12-EM061KGL
|| (ql_dev.idVendor == 0x3731 && ql_dev.idProduct == 0x0100) // NetPrisma LCUK54-WWD
|| (ql_dev.idVendor == 0x2c7c && (ql_dev.idProduct & 0xF000) == 0x0000)))
{
continue;
}
usleep(100 * 1000); // maybe other files not ready
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/bNumInterfaces", usbpath, usb->d_name);
ql_dev.bNumInterfaces = get_value_from_file(devpath, 10);
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/uevent", usbpath, usb->d_name);
ql_dev.major = atoi(get_value_from_uevent(devpath, "MAJOR"));
ql_dev.minor = atoi(get_value_from_uevent(devpath, "MINOR"));
ql_dev.busnum = atoi(get_value_from_uevent(devpath, "BUSNUM"));
ql_dev.devnum = atoi(get_value_from_uevent(devpath, "DEVNUM"));
strncpy(ql_dev.devname, get_value_from_uevent(devpath, "DEVNAME"), sizeof(ql_dev.devname) - 1);
snprintf(devpath, sizeof(devpath), "%s/%.16s/bcdDevice", usbpath, usb->d_name);
ql_dev.bcdDevice = get_value_from_file(devpath, 10);
memset(&ql_dev.dm_intf, 0xff, sizeof(struct ql_usb_interface_info));
memset(&ql_dev.general_intf, 0xff, sizeof(struct ql_usb_interface_info));
memset(&ql_dev.third_intf, 0xff, sizeof(struct ql_usb_interface_info));
ql_dev.general_type = -1;
ql_dev.third_type = -1;
ql_dev.dm_intf.bInterfaceNumber = 0; // include EC20 GW
if (ql_dev.bNumInterfaces > 1)
{
if (ql_dev.idVendor == 0x05c6 && ql_dev.idProduct == 0x90db)
{
ql_dev.general_intf.bInterfaceNumber = 4; // qdss_intf
ql_dev.general_type = MDM_QDSS;
g_is_qualcomm_chip = 1; // USB qdss log to pc
}
else if ((ql_dev.idVendor == 0x3731 && ql_dev.idProduct == 0x0100)
||(ql_dev.idVendor == 0x2c7c && (ql_dev.idProduct & 0xF000) == 0x0000))
{ // mdm
ql_dev.general_intf.bInterfaceNumber = 12; // qdss_intf
ql_dev.general_type = MDM_QDSS;
ql_dev.third_intf.bInterfaceNumber = 13; // third_intf
ql_dev.third_type = 1;
g_is_qualcomm_chip = 1; // USB qdss and adpl log to pc
}
else if (!strncasecmp(modem_name_para, "EC20", 4) && strlen(modem_name_para) <= 4)
{
if (ql_dev.idVendor == 0x3763 && ql_dev.idProduct == 0x3c93)
{
ql_dev.dm_intf.bInterfaceNumber = 0; // dm_intf EC20 GW
}
else if (ql_dev.idVendor == 0x3c93 && ql_dev.idProduct == 0xffff)
{
ql_dev.dm_intf.bInterfaceNumber = 8; // dm_intf EC20 GW
}
}
}
// Adapt to capture dump(ql_dev.bNumInterfaces == 1) and capture log(ql_dev.bNumInterfaces > 1) to specify DM port
if ((ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x0127) // EM05CEFC-LNV Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x0128) // EM060KGL Google Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x0310) // EM05-CN Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x030a) // EM05-G Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x0309) // EM05E-EDU Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x6008) // SDX12-EM061KGL Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x6009) // SDX12-EM061KGL Laptop
|| (ql_dev.idVendor == 0x2c7c && ql_dev.idProduct == 0x030d) // EM05G-FCCL Laptop
|| (ql_dev.idVendor == 0x3731 && ql_dev.idProduct == 0x0100)) // NetPrisma LCUK54-WWD
{
ql_dev.dm_intf.bInterfaceNumber = 3;
if (ql_dev.idProduct == 0x0128 ||
ql_dev.idProduct == 0x6008 ||
ql_dev.idProduct == 0x6009 ||
ql_dev.idProduct == 0x0100)
{
if (ql_dev.bNumInterfaces > 7)
{
/*
* These products are secureboot enabled since 2023/10.
* Secureboot disables log captured through QDSS and APDL interface.
* if `secboot_debug_mode` is not set, just remove the settings of QDSS and APDL,
* all logs are captured through DM interface.
*/
if (secboot_debug_mode) // false by default
{
ql_dev.general_intf.bInterfaceNumber = 6; // qdss_intf
ql_dev.general_type = MDM_QDSS;
ql_dev.third_intf.bInterfaceNumber = 7; // third_intf
ql_dev.third_type = 1;
}
}
else if (ql_dev.bNumInterfaces == 4)
ql_dev.is_dump = 1;
}
}
_rescan_dm:
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/%.16s:1.%d", usbpath, usb->d_name, usb->d_name, ql_dev.dm_intf.bInterfaceNumber);
if (access(devpath, F_OK))
continue;
ql_find_usb_interface_info(devpath, &ql_dev.dm_intf);
if (ql_dev.dm_intf.bInterfaceNumber == 0 && ql_dev.dm_intf.bInterfaceClass == 0x02 && ql_dev.dm_intf.bInterfaceSubClass == 0x0e)
{ // EM05-G 's interface 0 is MBIM
ql_dev.dm_intf.bInterfaceNumber = 3;
goto _rescan_dm;
}
ql_find_tty_info(devpath, ql_dev.ttyDM, sizeof(ql_dev.ttyDM));
if (ql_dev.ttyDM[0])
{
ql_get_dm_major_and_minor(ql_dev.ttyDM, &ql_dev);
}
if (ql_dev.general_intf.bInterfaceNumber != 0xFF && (ql_dev.general_type == EC200U_AP || ql_dev.general_type == RG500U_LOG))
{
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/%.16s:1.%d", usbpath, usb->d_name, usb->d_name, ql_dev.general_intf.bInterfaceNumber);
if (access(devpath, F_OK))
continue;
ql_find_usb_interface_info(devpath, &ql_dev.general_intf);
ql_find_tty_info(devpath, ql_dev.ttyGENERAL, sizeof(ql_dev.ttyGENERAL));
}
else if (ql_dev.general_intf.bInterfaceNumber != 0xFF && ql_dev.general_type == MDM_QDSS)
{
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/%.16s:1.%d", usbpath, usb->d_name, usb->d_name, ql_dev.general_intf.bInterfaceNumber);
if (!access(devpath, F_OK))
{
ql_find_usb_interface_info(devpath, &ql_dev.general_intf);
if (ql_dev.general_intf.bInterfaceClass != 0xff || ql_dev.general_intf.bInterfaceSubClass != 0xff || ql_dev.general_intf.bInterfaceProtocol != 0x70 || ql_dev.general_intf.bNumEndpoints != 1 || ql_dev.general_intf.ep_out != 0xff || ql_dev.general_intf.ep_in == 0xff)
{
qlog_dbg("not a vaild qdss usb interface!\n");
memset(&ql_dev.general_intf, 0xff, sizeof(struct ql_usb_interface_info));
ql_dev.general_type = -1;
}
}
else
{
memset(&ql_dev.general_intf, 0xff, sizeof(struct ql_usb_interface_info));
ql_dev.general_type = -1;
}
}
if (ql_dev.third_intf.bInterfaceNumber != 0xFF && ql_dev.third_type == 2)
{
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/%.16s:1.%d", usbpath, usb->d_name, usb->d_name, ql_dev.third_intf.bInterfaceNumber);
if (access(devpath, F_OK))
continue;
ql_find_usb_interface_info(devpath, &ql_dev.third_intf);
ql_find_tty_info(devpath, ql_dev.ttyTHIRD, sizeof(ql_dev.ttyTHIRD));
}
else if (ql_dev.third_intf.bInterfaceNumber != 0xFF && ql_dev.third_type == 1)
{
snprintf(devpath, sizeof(devpath), "%.24s/%.16s/%.16s:1.%d", usbpath, usb->d_name, usb->d_name, ql_dev.third_intf.bInterfaceNumber);
if (!access(devpath, F_OK))
{
ql_find_usb_interface_info(devpath, &ql_dev.third_intf);
if (ql_dev.third_intf.bInterfaceClass != 0xff || ql_dev.third_intf.bInterfaceSubClass != 0xff || ql_dev.third_intf.bInterfaceProtocol != 0x80 || ql_dev.third_intf.bNumEndpoints != 1 || ql_dev.third_intf.ep_out != 0xff || ql_dev.third_intf.ep_in == 0xff)
{
qlog_dbg("not a vaild DPL usb interface!\n");
memset(&ql_dev.third_intf, 0xff, sizeof(struct ql_usb_interface_info));
ql_dev.third_type = -1;
}
}
else
{
memset(&ql_dev.third_intf, 0xff, sizeof(struct ql_usb_interface_info));
ql_dev.third_type = -1;
}
}
snprintf(ql_dev.usbdevice_pah, sizeof(ql_dev.usbdevice_pah), "%.24s/%.16s", usbpath, usb->d_name);
qlog_dbg("Find [%d] idVendor=%04x, idProduct=%04x, bNumInterfaces=%d, ttyDM=%s, ttyGENERAL=%s, ttyTHIRD=%s, busnum=%03d, dev=%03d, usbdevice_pah=%s\n",
modules_num, ql_dev.idVendor, ql_dev.idProduct, ql_dev.bNumInterfaces, ql_dev.ttyDM,
ql_dev.ttyGENERAL, ql_dev.ttyTHIRD, ql_dev.busnum, ql_dev.devnum, ql_dev.usbdevice_pah);
if (modules_num < MAX_USB_DEV)
s_usb_device_info[modules_num++] = ql_dev;
}
closedir(usb_dir);
return modules_num;
}
int ql_usbfs_open_interface(const struct ql_usb_device_info *usb_dev, int intf)
{
char devname[64];
int dev_mknod_and_delete_after_use = 0;
int usbfd = -1;
int ret;
snprintf(devname, sizeof(devname), "/dev/%s", usb_dev->devname);
if (access(devname, F_OK) && errno == ENOENT)
{
char *p = strstr(devname + strlen("/dev/"), "/");
while (p)
{
p[0] = '_';
p = strstr(p, "/");
}
#define MKDEV(__ma, __mi) (((__ma & 0xfff) << 8) | (__mi & 0xff) | ((__mi & 0xfff00) << 12))
// coverity[fs_check_call:FALSE]
if (mknod(devname, S_IFCHR | 0666, MKDEV(usb_dev->major, usb_dev->minor)))
{
devname[1] = 't';
devname[2] = 'm';
devname[3] = 'p';
if (mknod(devname, S_IFCHR | 0666, MKDEV(usb_dev->major, usb_dev->minor)))
{
qlog_dbg("Fail to mknod %s, errno : %d (%s)\n", devname, errno, strerror(errno));
}
}
dev_mknod_and_delete_after_use = 1;
}
usbfd = open(devname, O_RDWR | O_NDELAY);
if (dev_mknod_and_delete_after_use)
{
if (remove(devname))
{
// TODO
}
}
if (usbfd == -1)
{
qlog_dbg("usbfs open %s failed, errno: %d (%s)\n", devname, errno, strerror(errno));
return -1;
}
if (usbfs_is_kernel_driver_alive(usbfd, intf))
usbfs_detach_kernel_driver(usbfd, intf);
ret = ioctl(usbfd, USBDEVFS_CLAIMINTERFACE, &intf); // attach usbfs driver
if (ret != 0)
{
qlog_dbg("ioctl USBDEVFS_CLAIMINTERFACE failed, errno = %d(%s)\n", errno, strerror(errno));
close(usbfd);
return -1;
}
return usbfd;
}
int ql_usbfs_read(int usbfd, int ep_in, void *pbuf, unsigned len)
{
struct usbdevfs_bulktransfer bulk;
int n = 0;
bulk.ep = ep_in;
bulk.len = len;
bulk.data = (void *)pbuf;
bulk.timeout = 0; // keep waiting
n = ioctl(usbfd, USBDEVFS_BULK, &bulk);
if (n < 0)
{
qlog_dbg("%s n = %d, errno: %d (%s)\n", __func__, n, errno, strerror(errno));
}
return n;
}
int ql_usbfs_write(int usbfd, int ep_out, const void *pbuf, unsigned len)
{
struct usbdevfs_urb bulk;
struct usbdevfs_urb *urb = &bulk;
int n = 0;
memset(urb, 0, sizeof(struct usbdevfs_urb));
urb->type = USBDEVFS_URB_TYPE_BULK;
urb->endpoint = ep_out;
urb->status = -1;
urb->buffer = (void *)pbuf;
urb->buffer_length = len;
urb->usercontext = urb;
urb->flags = 0;
n = ioctl(usbfd, USBDEVFS_SUBMITURB, urb);
if (n < 0)
{
qlog_dbg("%s submit n = %d, errno: %d (%s)\n", __func__, n, errno, strerror(errno));
return 0;
}
urb = NULL;
n = ioctl(usbfd, USBDEVFS_REAPURB, &urb);
if (n < 0)
{
qlog_dbg("%s reap n = %d, errno: %d (%s)\n", __func__, n, errno, strerror(errno));
return 0;
}
if (urb && urb->status == 0 && urb->actual_length)
{
return urb->actual_length;
}
return 0;
}