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-rw-r--r--payloads/libpayload/drivers/usb/usb.c23
-rw-r--r--payloads/libpayload/drivers/usb/usbmsc.c151
-rw-r--r--payloads/libpayload/include/usb/usb.h2
3 files changed, 116 insertions, 60 deletions
diff --git a/payloads/libpayload/drivers/usb/usb.c b/payloads/libpayload/drivers/usb/usb.c
index 42c73f345e..99b65e03f2 100644
--- a/payloads/libpayload/drivers/usb/usb.c
+++ b/payloads/libpayload/drivers/usb/usb.c
@@ -206,7 +206,7 @@ set_configuration (usbdev_t *dev)
dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
}
-void
+int
clear_feature (usbdev_t *dev, int endp, int feature, int rtype)
{
dev_req_t dr;
@@ -217,7 +217,7 @@ clear_feature (usbdev_t *dev, int endp, int feature, int rtype)
dr.wValue = feature;
dr.wIndex = endp;
dr.wLength = 0;
- dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
+ return dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
}
int
@@ -228,9 +228,9 @@ clear_stall (endpoint_t *ep)
int rtype = gen_bmRequestType (host_to_device, standard_type,
endp ? endp_recp : dev_recp);
- clear_feature (dev, endp, ENDPOINT_HALT, rtype);
+ int ret = clear_feature (dev, endp, ENDPOINT_HALT, rtype);
ep->toggle = 0;
- return 0;
+ return ret;
}
/* returns free address or -1 */
@@ -459,12 +459,21 @@ set_address (hci_t *controller, int speed, int hubport, int hubaddr)
return adr;
}
+/*
+ * Should be called by the hub drivers whenever a physical detach occurs
+ * and can be called by usb class drivers if they are unsatisfied with a
+ * malfunctioning device.
+ */
void
usb_detach_device(hci_t *controller, int devno)
{
- controller->devices[devno]->destroy (controller->devices[devno]);
- free(controller->devices[devno]);
- controller->devices[devno] = 0;
+ /* check if device exists, as we may have
+ been called yet by the usb class driver */
+ if (controller->devices[devno]) {
+ controller->devices[devno]->destroy (controller->devices[devno]);
+ free(controller->devices[devno]);
+ controller->devices[devno] = NULL;
+ }
}
int
diff --git a/payloads/libpayload/drivers/usb/usbmsc.c b/payloads/libpayload/drivers/usb/usbmsc.c
index fd6517a5e3..d1e33022c3 100644
--- a/payloads/libpayload/drivers/usb/usbmsc.c
+++ b/payloads/libpayload/drivers/usb/usbmsc.c
@@ -106,10 +106,22 @@ typedef struct {
unsigned char bCSWStatus;
} __attribute__ ((packed)) csw_t;
+enum {
+ /*
+ * MSC commands can be
+ * successful,
+ * fail with proper response or
+ * fail totally, which results in detaching of the usb device.
+ * In the latter case the caller has to make sure, that he won't
+ * use the device any more.
+ */
+ MSC_COMMAND_OK = 0, MSC_COMMAND_FAIL, MSC_COMMAND_DETACHED
+};
+
static int
request_sense (usbdev_t *dev);
-static void
+static int
reset_transport (usbdev_t *dev)
{
dev_req_t dr;
@@ -124,9 +136,17 @@ reset_transport (usbdev_t *dev)
dr.wValue = 0;
dr.wIndex = 0;
dr.wLength = 0;
- dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0);
- clear_stall (MSC_INST (dev)->bulk_in);
- clear_stall (MSC_INST (dev)->bulk_out);
+
+ /* if any of these fails, detach device, as we are lost */
+ if (dev->controller->control (dev, OUT, sizeof (dr), &dr, 0, 0) ||
+ clear_stall (MSC_INST (dev)->bulk_in) ||
+ clear_stall (MSC_INST (dev)->bulk_out)) {
+ printf ("Detaching unresponsive device.\n");
+ usb_detach_device (dev->controller, dev->address);
+ return MSC_COMMAND_DETACHED;
+ }
+ /* return fail as we are only called in case of failure */
+ return MSC_COMMAND_FAIL;
}
/* device may stall this command, so beware! */
@@ -177,20 +197,18 @@ get_csw (endpoint_t *ep, csw_t *csw)
clear_stall (ep);
if (ep->dev->controller->bulk
(ep, sizeof (csw_t), (u8 *) csw, 1)) {
- reset_transport (ep->dev);
- return 1;
+ return reset_transport (ep->dev);
}
}
if (csw->dCSWTag != tag) {
- reset_transport (ep->dev);
- return 1;
+ return reset_transport (ep->dev);
}
- return 0;
+ return MSC_COMMAND_OK;
}
static int
execute_command (usbdev_t *dev, cbw_direction dir, const u8 *cb, int cblen,
- u8 *buf, int buflen)
+ u8 *buf, int buflen, int residue_ok)
{
cbw_t cbw;
csw_t csw;
@@ -202,43 +220,48 @@ execute_command (usbdev_t *dev, cbw_direction dir, const u8 *cb, int cblen,
wrap_cbw (&cbw, buflen, dir, cb, cblen);
if (dev->controller->
bulk (MSC_INST (dev)->bulk_out, sizeof (cbw), (u8 *) &cbw, 0)) {
- reset_transport (dev);
- return 1;
+ return reset_transport (dev);
}
if (buflen > 0) {
if (dir == cbw_direction_data_in) {
if (dev->controller->
bulk (MSC_INST (dev)->bulk_in, buflen, buf, 0)) {
clear_stall (MSC_INST (dev)->bulk_in);
- return 1;
+ return MSC_COMMAND_FAIL;
}
} else {
if (dev->controller->
bulk (MSC_INST (dev)->bulk_out, buflen, buf, 0)) {
clear_stall (MSC_INST (dev)->bulk_out);
- return 1;
+ return MSC_COMMAND_FAIL;
}
}
}
- if (get_csw (MSC_INST (dev)->bulk_in, &csw))
- return 1;
- if (always_succeed == 1) {
- // return success, regardless of message
- return 0;
- }
- if (csw.bCSWStatus == 2) {
- // phase error, reset transport
- reset_transport (dev);
- return 1;
- }
- if (csw.bCSWStatus == 0) {
- // no error, exit
- return 0;
+ int ret = get_csw (MSC_INST (dev)->bulk_in, &csw);
+ if (ret) {
+ return ret;
+ } else if (always_succeed == 1) {
+ /* return success, regardless of message */
+ return MSC_COMMAND_OK;
+ } else if (csw.bCSWStatus == 2) {
+ /* phase error, reset transport */
+ return reset_transport (dev);
+ } else if (csw.bCSWStatus == 0) {
+ if ((csw.dCSWDataResidue == 0) || residue_ok)
+ /* no error, exit */
+ return MSC_COMMAND_OK;
+ else
+ /* missed some bytes */
+ return MSC_COMMAND_FAIL;
+ } else {
+ if (cb[0] == 0x03)
+ /* requesting sense failed, that's bad */
+ return MSC_COMMAND_FAIL;
+ /* error "check condition" or reserved error */
+ ret = request_sense (dev);
+ /* return fail or the status of request_sense if it's worse */
+ return ret ? ret : MSC_COMMAND_FAIL;
}
- if (cb[0] != 0x03) /* 0x03 == request sense */
- // error "check condition" or reserved error
- request_sense (dev);
- return 1;
}
typedef struct {
@@ -309,7 +332,8 @@ readwrite_blocks (usbdev_t *dev, int start, int n, cbw_direction dir, u8 *buf)
cb.numblocks = htonw (n);
return execute_command (dev, dir, (u8 *) &cb, sizeof (cb), buf,
- n * MSC_INST(dev)->blocksize);
+ n * MSC_INST(dev)->blocksize, 0)
+ != MSC_COMMAND_OK ? 1 : 0;
}
/* Only request it, we don't interpret it.
@@ -324,7 +348,7 @@ request_sense (usbdev_t *dev)
cb.command = 0x3;
return execute_command (dev, cbw_direction_data_in, (u8 *) &cb,
- sizeof (cb), buf, 19);
+ sizeof (cb), buf, 19, 1);
}
static int
@@ -333,7 +357,7 @@ test_unit_ready (usbdev_t *dev)
cmdblock6_t cb;
memset (&cb, 0, sizeof (cb)); // full initialization for T-U-R
return execute_command (dev, cbw_direction_data_out, (u8 *) &cb,
- sizeof (cb), 0, 0);
+ sizeof (cb), 0, 0, 0);
}
static int
@@ -344,10 +368,10 @@ spin_up (usbdev_t *dev)
cb.command = 0x1b;
cb.lun = 1;
return execute_command (dev, cbw_direction_data_out, (u8 *) &cb,
- sizeof (cb), 0, 0);
+ sizeof (cb), 0, 0, 0);
}
-static void
+static int
read_capacity (usbdev_t *dev)
{
cmdblock_t cb;
@@ -356,12 +380,20 @@ read_capacity (usbdev_t *dev)
u8 buf[8];
debug ("Reading capacity of mass storage device.\n");
- int count = 0;
- while ((count++ < 20)
- &&
- (execute_command
- (dev, cbw_direction_data_in, (u8 *) &cb, sizeof (cb), buf,
- 8) == 1));
+ int count = 0, ret;
+ while (count++ < 20) {
+ switch (ret = execute_command
+ (dev, cbw_direction_data_in, (u8 *) &cb,
+ sizeof (cb), buf, 8, 0)) {
+ case MSC_COMMAND_OK:
+ break;
+ case MSC_COMMAND_FAIL:
+ continue;
+ default: /* if it's worse return */
+ return ret;
+ }
+ break;
+ }
if (count >= 20) {
// still not successful, assume 2tb in 512byte sectors, which is just the same garbage as any other number, but probably more usable.
printf (" assuming 2 TB with 512-byte sectors as READ CAPACITY didn't answer.\n");
@@ -377,6 +409,7 @@ read_capacity (usbdev_t *dev)
MSC_INST (dev)->numblocks > 1000000
? (MSC_INST (dev)->numblocks / 1000) * MSC_INST (dev)->blocksize / 1000 :
MSC_INST (dev)->numblocks * MSC_INST (dev)->blocksize / 1000 / 1000);
+ return MSC_COMMAND_OK;
}
void
@@ -444,12 +477,21 @@ usb_msc_init (usbdev_t *dev)
printf (" Waiting for device to become ready...");
timeout = 30 * 10; /* SCSI/ATA specs say we have to wait up to 30s. Ugh */
- while (test_unit_ready (dev) && --timeout) {
- mdelay (100);
- if (!(timeout % 10))
- printf (".");
+ while (timeout--) {
+ switch (test_unit_ready (dev)) {
+ case MSC_COMMAND_OK:
+ break;
+ case MSC_COMMAND_FAIL:
+ mdelay (100);
+ if (!(timeout % 10))
+ printf (".");
+ continue;
+ default: /* if it's worse return */
+ return;
+ }
+ break;
}
- if (test_unit_ready (dev)) {
+ if (timeout < 0) {
printf ("timeout. Device not ready. Still trying...\n");
} else {
printf ("ok.\n");
@@ -458,15 +500,20 @@ usb_msc_init (usbdev_t *dev)
debug (" spin up");
for (i = 0; i < 30; i++) {
debug (".");
- if (!spin_up (dev)) {
+ switch (spin_up (dev)) {
+ case MSC_COMMAND_OK:
debug (" OK.");
break;
+ case MSC_COMMAND_FAIL:
+ mdelay (100);
+ continue;
+ default: /* if it's worse return */
+ return;
}
- mdelay (100);
+ break;
}
debug ("\n");
- read_capacity (dev);
- if (usbdisk_create)
+ if ((read_capacity (dev) == MSC_COMMAND_OK) && usbdisk_create)
usbdisk_create (dev);
}
diff --git a/payloads/libpayload/include/usb/usb.h b/payloads/libpayload/include/usb/usb.h
index ee9c50bb85..ecfee54551 100644
--- a/payloads/libpayload/include/usb/usb.h
+++ b/payloads/libpayload/include/usb/usb.h
@@ -215,7 +215,7 @@ void init_device_entry (hci_t *controller, int num);
void set_feature (usbdev_t *dev, int endp, int feature, int rtype);
void get_status (usbdev_t *dev, int endp, int rtype, int len, void *data);
-void clear_feature (usbdev_t *dev, int endp, int feature, int rtype);
+int clear_feature (usbdev_t *dev, int endp, int feature, int rtype);
int clear_stall (endpoint_t *ep);
void usb_nop_init (usbdev_t *dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-19 08:55:04 +0000