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Diffstat (limited to 'common/usb.c')
-rw-r--r--common/usb.c254
1 files changed, 190 insertions, 64 deletions
diff --git a/common/usb.c b/common/usb.c
index 4136f8d..1738d95 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -37,6 +37,7 @@
#include <common.h>
#include <command.h>
#include <asm/processor.h>
+#include <linux/ctype.h>
#if (CONFIG_COMMANDS & CFG_CMD_USB)
@@ -46,7 +47,7 @@
#endif
-/* #define USB_DEBUG */
+#undef USB_DEBUG
#ifdef USB_DEBUG
#define USB_PRINTF(fmt,args...) printf (fmt ,##args)
@@ -70,6 +71,7 @@ void usb_scan_devices(void);
int usb_hub_probe(struct usb_device *dev, int ifnum);
void usb_hub_reset(void);
+
/***********************************************************************
* wait_ms
*/
@@ -157,6 +159,7 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe,
{
if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
return -1;
+
/* set setup command */
setup_packet.requesttype = requesttype;
setup_packet.request = request;
@@ -330,8 +333,7 @@ int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
int usb_clear_halt(struct usb_device *dev, int pipe)
{
int result;
- unsigned short status;
- int endp=usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
+ int endp = usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
@@ -339,15 +341,14 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
/* don't clear if failed */
if (result < 0)
return result;
- result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_STATUS, USB_DIR_IN | USB_RECIP_ENDPOINT, 0, endp,
- &status, sizeof(status), USB_CNTL_TIMEOUT * 3);
- if (result < 0)
- return result;
- USB_PRINTF("usb_clear_halt: status 0x%x\n",status);
- if (status & 1)
- return -1; /* still halted */
+
+ /*
+ * NOTE: we do not get status and verify reset was successful
+ * as some devices are reported to lock up upon this check..
+ */
+
usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+
/* toggle is reset on clear */
usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
return 0;
@@ -423,7 +424,7 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
struct usb_interface_descriptor *if_face = NULL;
int ret, i;
- for (i=0; i<dev->config.bNumInterfaces; i++) {
+ for (i = 0; i < dev->config.bNumInterfaces; i++) {
if (dev->config.if_desc[i].bInterfaceNumber == interface) {
if_face = &dev->config.if_desc[i];
break;
@@ -439,8 +440,6 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
return ret;
- if_face->act_altsetting = (unsigned char)alternate;
- usb_set_maxpacket(dev);
return 0;
}
@@ -511,11 +510,74 @@ int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
*/
int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
- (USB_DT_STRING << 8) + index, langid, buf, size, USB_CNTL_TIMEOUT);
+ int i;
+ int result;
+
+ for (i = 0; i < 3; ++i) {
+ /* some devices are flaky */
+ result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
+ (USB_DT_STRING << 8) + index, langid, buf, size,
+ USB_CNTL_TIMEOUT);
+
+ if (result > 0)
+ break;
+ }
+
+ return result;
+}
+
+
+static void usb_try_string_workarounds(unsigned char *buf, int *length)
+{
+ int newlength, oldlength = *length;
+
+ for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
+ if (!isprint(buf[newlength]) || buf[newlength + 1])
+ break;
+
+ if (newlength > 2) {
+ buf[0] = newlength;
+ *length = newlength;
+ }
}
+
+static int usb_string_sub(struct usb_device *dev, unsigned int langid,
+ unsigned int index, unsigned char *buf)
+{
+ int rc;
+
+ /* Try to read the string descriptor by asking for the maximum
+ * possible number of bytes */
+ rc = usb_get_string(dev, langid, index, buf, 255);
+
+ /* If that failed try to read the descriptor length, then
+ * ask for just that many bytes */
+ if (rc < 2) {
+ rc = usb_get_string(dev, langid, index, buf, 2);
+ if (rc == 2)
+ rc = usb_get_string(dev, langid, index, buf, buf[0]);
+ }
+
+ if (rc >= 2) {
+ if (!buf[0] && !buf[1])
+ usb_try_string_workarounds(buf, &rc);
+
+ /* There might be extra junk at the end of the descriptor */
+ if (buf[0] < rc)
+ rc = buf[0];
+
+ rc = rc - (rc & 1); /* force a multiple of two */
+ }
+
+ if (rc < 2)
+ rc = -1;
+
+ return rc;
+}
+
+
/********************************************************************
* usb_string:
* Get string index and translate it to ascii.
@@ -535,7 +597,7 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
/* get langid for strings if it's not yet known */
if (!dev->have_langid) {
- err = usb_get_string(dev, 0, 0, tbuf, 4);
+ err = usb_string_sub(dev, 0, 0, tbuf);
if (err < 0) {
USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
return -1;
@@ -550,22 +612,11 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
dev->devnum, dev->string_langid);
}
}
- /* Just ask for a maximum length string and then take the length
- * that was returned. */
- err = usb_get_string(dev, dev->string_langid, index, tbuf, 4);
- if (err < 0)
- return err;
- u=tbuf[0];
- USB_PRINTF("Strn Len %d, index %d\n",u,index);
- if (u > USB_BUFSIZ) {
- USB_PRINTF("usb_string: failed to get string - too long: %d\n", u);
- return -1;
- }
-
- err = usb_get_string(dev, dev->string_langid, index, tbuf, u);
+ err = usb_string_sub(dev, dev->string_langid, index, tbuf);
if (err < 0)
return err;
+
size--; /* leave room for trailing NULL char in output buffer */
for (idx = 0, u = 2; u < err; u += 2) {
if (idx >= size)
@@ -641,11 +692,66 @@ int usb_new_device(struct usb_device *dev)
/* We still haven't set the Address yet */
addr = dev->devnum;
dev->devnum = 0;
+
+#undef NEW_INIT_SEQ
+#ifdef NEW_INIT_SEQ
+ /* this is a Windows scheme of initialization sequence, with double
+ * reset of the device. Some equipment is said to work only with such
+ * init sequence; this patch is based on the work by Alan Stern:
+ * http://sourceforge.net/mailarchive/forum.php?thread_id=5729457&forum_id=5398
+ */
+ int j;
+ struct usb_device_descriptor *desc;
+ int port = -1;
+ struct usb_device *parent = dev->parent;
+ unsigned short portstatus;
+
+ /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
+ * only 18 bytes long, this will terminate with a short packet. But if
+ * the maxpacket size is 8 or 16 the device may be waiting to transmit
+ * some more. */
+
+ desc = (struct usb_device_descriptor *)tmpbuf;
+ desc->bMaxPacketSize0 = 0;
+ for (j = 0; j < 3; ++j) {
+ err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
+ if (err < 0) {
+ USB_PRINTF("usb_new_device: 64 byte descr\n");
+ break;
+ }
+ }
+ dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
+
+ /* find the port number we're at */
+ if (parent) {
+
+ for (j = 0; j < parent->maxchild; j++) {
+ if (parent->children[j] == dev) {
+ port = j;
+ break;
+ }
+ }
+ if (port < 0) {
+ printf("usb_new_device: cannot locate device's port..\n");
+ return 1;
+ }
+
+ /* reset the port for the second time */
+ err = hub_port_reset(dev->parent, port, &portstatus);
+ if (err < 0) {
+ printf("\n Couldn't reset port %i\n", port);
+ return 1;
+ }
+ }
+#else
+ /* and this is the old and known way of initializing devices */
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
if (err < 8) {
printf("\n USB device not responding, giving up (status=%lX)\n",dev->status);
return 1;
}
+#endif
+
dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
switch (dev->descriptor.bMaxPacketSize0) {
@@ -723,7 +829,7 @@ void usb_scan_devices(void)
/* device 0 is always present (root hub, so let it analyze) */
dev=usb_alloc_new_device();
usb_new_device(dev);
- printf("%d USB Devices found\n",dev_index);
+ printf("%d USB Device(s) found\n",dev_index);
/* insert "driver" if possible */
#ifdef CONFIG_USB_KEYBOARD
drv_usb_kbd_init();
@@ -821,39 +927,15 @@ struct usb_hub_device *usb_hub_allocate(void)
#define MAX_TRIES 5
-void usb_hub_port_connect_change(struct usb_device *dev, int port)
+static int hub_port_reset(struct usb_device *dev, int port,
+ unsigned short *portstat)
{
- struct usb_device *usb;
+ int tries;
struct usb_port_status portsts;
unsigned short portstatus, portchange;
- int tries;
- /* Check status */
- if (usb_get_port_status(dev, port + 1, &portsts)<0) {
- USB_HUB_PRINTF("get_port_status failed\n");
- return;
- }
-
- portstatus = swap_16(portsts.wPortStatus);
- portchange = swap_16(portsts.wPortChange);
- USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
- portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
-
- /* Clear the connection change status */
- usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
-
- /* Disconnect any existing devices under this port */
- if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
- (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
- USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
- /* Return now if nothing is connected */
- if (!(portstatus & USB_PORT_STAT_CONNECTION))
- return;
- }
- wait_ms(200);
-
- /* Reset the port */
+ USB_HUB_PRINTF("hub_port_reset: resetting port %d...\n", port);
for(tries=0;tries<MAX_TRIES;tries++) {
usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
@@ -861,7 +943,7 @@ void usb_hub_port_connect_change(struct usb_device *dev, int port)
if (usb_get_port_status(dev, port + 1, &portsts)<0) {
USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
- return;
+ return -1;
}
portstatus = swap_16(portsts.wPortStatus);
portchange = swap_16(portsts.wPortChange);
@@ -873,10 +955,12 @@ void usb_hub_port_connect_change(struct usb_device *dev, int port)
(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
!(portstatus & USB_PORT_STAT_CONNECTION))
- return;
+ return -1;
- if (portstatus & USB_PORT_STAT_ENABLE)
+ if (portstatus & USB_PORT_STAT_ENABLE) {
+
break;
+ }
wait_ms(200);
}
@@ -884,10 +968,52 @@ void usb_hub_port_connect_change(struct usb_device *dev, int port)
if (tries==MAX_TRIES) {
USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
- return;
+ return -1;
}
usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
+ *portstat = portstatus;
+ return 0;
+
+}
+
+
+void usb_hub_port_connect_change(struct usb_device *dev, int port)
+{
+ struct usb_device *usb;
+ struct usb_port_status portsts;
+ unsigned short portstatus, portchange;
+
+ /* Check status */
+ if (usb_get_port_status(dev, port + 1, &portsts)<0) {
+ USB_HUB_PRINTF("get_port_status failed\n");
+ return;
+ }
+
+ portstatus = swap_16(portsts.wPortStatus);
+ portchange = swap_16(portsts.wPortChange);
+ USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
+ portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
+
+ /* Clear the connection change status */
+ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
+
+ /* Disconnect any existing devices under this port */
+ if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
+ (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
+ USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
+ /* Return now if nothing is connected */
+ if (!(portstatus & USB_PORT_STAT_CONNECTION))
+ return;
+ }
+ wait_ms(200);
+
+ /* Reset the port */
+ if (hub_port_reset(dev, port, &portstatus) < 0) {
+ printf("cannot reset port %i!?\n", port + 1);
+ return;
+ }
+
wait_ms(200);
/* Allocate a new device struct for it */
generated by cgit v1.1 at 2024-11-23 18:30:26 +0000