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Diffstat (limited to 'common/usb.c')
-rw-r--r--common/usb.c324
1 files changed, 199 insertions, 125 deletions
diff --git a/common/usb.c b/common/usb.c
index d94640a99e..a4820d3e94 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -28,6 +28,7 @@
*/
#include <common.h>
#include <command.h>
+#include <dm.h>
#include <asm/processor.h>
#include <linux/compiler.h>
#include <linux/ctype.h>
@@ -41,12 +42,13 @@
#define USB_BUFSIZ 512
-static struct usb_device usb_dev[USB_MAX_DEVICE];
-static int dev_index;
static int asynch_allowed;
-
char usb_started; /* flag for the started/stopped USB status */
+#ifndef CONFIG_DM_USB
+static struct usb_device usb_dev[USB_MAX_DEVICE];
+static int dev_index;
+
#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
#define CONFIG_USB_MAX_CONTROLLER_COUNT 1
#endif
@@ -94,8 +96,8 @@ int usb_init(void)
controllers_initialized++;
start_index = dev_index;
printf("scanning bus %d for devices... ", i);
- dev = usb_alloc_new_device(ctrl);
- if (!dev)
+ ret = usb_alloc_new_device(ctrl, &dev);
+ if (ret)
break;
/*
@@ -104,7 +106,7 @@ int usb_init(void)
*/
ret = usb_new_device(dev);
if (ret)
- usb_free_device();
+ usb_free_device(dev->controller);
if (start_index == dev_index) {
puts("No USB Device found\n");
@@ -158,6 +160,7 @@ int usb_disable_asynch(int disable)
asynch_allowed = !disable;
return old_value;
}
+#endif /* !CONFIG_DM_USB */
/*-------------------------------------------------------------------
@@ -821,6 +824,7 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
* the USB device are static allocated [USB_MAX_DEVICE].
*/
+#ifndef CONFIG_DM_USB
/* returns a pointer to the device with the index [index].
* if the device is not assigned (dev->devnum==-1) returns NULL
@@ -833,16 +837,13 @@ struct usb_device *usb_get_dev_index(int index)
return &usb_dev[index];
}
-/* returns a pointer of a new device structure or NULL, if
- * no device struct is available
- */
-struct usb_device *usb_alloc_new_device(void *controller)
+int usb_alloc_new_device(struct udevice *controller, struct usb_device **devp)
{
int i;
debug("New Device %d\n", dev_index);
if (dev_index == USB_MAX_DEVICE) {
printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
- return NULL;
+ return -ENOSPC;
}
/* default Address is 0, real addresses start with 1 */
usb_dev[dev_index].devnum = dev_index + 1;
@@ -852,7 +853,9 @@ struct usb_device *usb_alloc_new_device(void *controller)
usb_dev[dev_index].parent = NULL;
usb_dev[dev_index].controller = controller;
dev_index++;
- return &usb_dev[dev_index - 1];
+ *devp = &usb_dev[dev_index - 1];
+
+ return 0;
}
/*
@@ -860,7 +863,7 @@ struct usb_device *usb_alloc_new_device(void *controller)
* Called in error cases where configuring a newly attached
* device fails for some reason.
*/
-void usb_free_device(void)
+void usb_free_device(struct udevice *controller)
{
dev_index--;
debug("Freeing device node: %d\n", dev_index);
@@ -878,123 +881,101 @@ __weak int usb_alloc_device(struct usb_device *udev)
{
return 0;
}
-/*
- * By the time we get here, the device has gotten a new device ID
- * and is in the default state. We need to identify the thing and
- * get the ball rolling..
- *
- * Returns 0 for success, != 0 for error.
- */
-int usb_new_device(struct usb_device *dev)
+#endif /* !CONFIG_DM_USB */
+
+#ifndef CONFIG_DM_USB
+int usb_legacy_port_reset(struct usb_device *hub, int portnr)
{
- int addr, err;
- int tmp;
- ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
+ if (hub) {
+ unsigned short portstatus;
+ int err;
- /*
- * Allocate usb 3.0 device context.
- * USB 3.0 (xHCI) protocol tries to allocate device slot
- * and related data structures first. This call does that.
- * Refer to sec 4.3.2 in xHCI spec rev1.0
- */
- if (usb_alloc_device(dev)) {
- printf("Cannot allocate device context to get SLOT_ID\n");
- return -EINVAL;
+ /* reset the port for the second time */
+ err = legacy_hub_port_reset(hub, portnr - 1, &portstatus);
+ if (err < 0) {
+ printf("\n Couldn't reset port %i\n", portnr);
+ return err;
+ }
+ } else {
+ usb_reset_root_port();
}
- /* We still haven't set the Address yet */
- addr = dev->devnum;
- dev->devnum = 0;
+ return 0;
+}
+#endif
-#ifdef CONFIG_LEGACY_USB_INIT_SEQ
- /* this is the old and known way of initializing devices, it is
- * different than what Windows and Linux are doing. Windows and Linux
- * both retrieve 64 bytes while reading the device descriptor
- * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
- * invalid header while reading 8 bytes as device descriptor. */
- dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
- dev->maxpacketsize = PACKET_SIZE_8;
- dev->epmaxpacketin[0] = 8;
- dev->epmaxpacketout[0] = 8;
-
- err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8);
- if (err < 8) {
- printf("\n USB device not responding, " \
- "giving up (status=%lX)\n", dev->status);
- return -EIO;
+static int get_descriptor_len(struct usb_device *dev, int len, int expect_len)
+{
+ __maybe_unused struct usb_device_descriptor *desc;
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
+ int err;
+
+ desc = (struct usb_device_descriptor *)tmpbuf;
+
+ err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, len);
+ if (err < expect_len) {
+ if (err < 0) {
+ printf("unable to get device descriptor (error=%d)\n",
+ err);
+ return err;
+ } else {
+ printf("USB device descriptor short read (expected %i, got %i)\n",
+ expect_len, err);
+ return -EIO;
+ }
}
- memcpy(&dev->descriptor, tmpbuf, 8);
-#else
- /* This is a Windows scheme of initialization sequence, with double
+ memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
+
+ return 0;
+}
+
+static int usb_setup_descriptor(struct usb_device *dev, bool do_read)
+{
+ __maybe_unused struct usb_device_descriptor *desc;
+
+ /*
+ * This is a Windows scheme of initialization sequence, with double
* reset of the device (Linux uses the same sequence)
* 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
*/
- __maybe_unused struct usb_device_descriptor *desc;
- struct usb_device *parent = dev->parent;
- unsigned short portstatus;
- /* send 64-byte GET-DEVICE-DESCRIPTOR request. Since the descriptor is
+ /*
+ * 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, or keeps on retransmitting the 8 byte header. */
- desc = (struct usb_device_descriptor *)tmpbuf;
dev->descriptor.bMaxPacketSize0 = 64; /* Start off at 64 bytes */
/* Default to 64 byte max packet size */
dev->maxpacketsize = PACKET_SIZE_64;
dev->epmaxpacketin[0] = 64;
dev->epmaxpacketout[0] = 64;
- /*
- * XHCI needs to issue a Address device command to setup
- * proper device context structures, before it can interact
- * with the device. So a get_descriptor will fail before any
- * of that is done for XHCI unlike EHCI.
- */
-#ifndef CONFIG_USB_XHCI
- err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
- /*
- * Validate we've received only at least 8 bytes, not that we've
- * received the entire descriptor. The reasoning is:
- * - The code only uses fields in the first 8 bytes, so that's all we
- * need to have fetched at this stage.
- * - The smallest maxpacket size is 8 bytes. Before we know the actual
- * maxpacket the device uses, the USB controller may only accept a
- * single packet. Consequently we are only guaranteed to receive 1
- * packet (at least 8 bytes) even in a non-error case.
- *
- * At least the DWC2 controller needs to be programmed with the number
- * of packets in addition to the number of bytes. A request for 64
- * bytes of data with the maxpacket guessed as 64 (above) yields a
- * request for 1 packet.
- */
- if (err < 8) {
- debug("usb_new_device: usb_get_descriptor() failed\n");
- return -EIO;
- }
-
- dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
- /*
- * Fetch the device class, driver can use this info
- * to differentiate between HUB and DEVICE.
- */
- dev->descriptor.bDeviceClass = desc->bDeviceClass;
-#endif
+ if (do_read) {
+ int err;
- if (parent) {
- /* reset the port for the second time */
- err = hub_port_reset(dev->parent, dev->portnr - 1, &portstatus);
- if (err < 0) {
- printf("\n Couldn't reset port %i\n", dev->portnr);
- return -EIO;
- }
- } else {
- usb_reset_root_port();
+ /*
+ * Validate we've received only at least 8 bytes, not that we've
+ * received the entire descriptor. The reasoning is:
+ * - The code only uses fields in the first 8 bytes, so that's all we
+ * need to have fetched at this stage.
+ * - The smallest maxpacket size is 8 bytes. Before we know the actual
+ * maxpacket the device uses, the USB controller may only accept a
+ * single packet. Consequently we are only guaranteed to receive 1
+ * packet (at least 8 bytes) even in a non-error case.
+ *
+ * At least the DWC2 controller needs to be programmed with the number
+ * of packets in addition to the number of bytes. A request for 64
+ * bytes of data with the maxpacket guessed as 64 (above) yields a
+ * request for 1 packet.
+ */
+ err = get_descriptor_len(dev, 64, 8);
+ if (err)
+ return err;
}
-#endif
dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
@@ -1015,6 +996,33 @@ int usb_new_device(struct usb_device *dev)
printf("usb_new_device: invalid max packet size\n");
return -EIO;
}
+
+ return 0;
+}
+
+static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read,
+ struct usb_device *parent, int portnr)
+{
+ int err;
+
+ /*
+ * Allocate usb 3.0 device context.
+ * USB 3.0 (xHCI) protocol tries to allocate device slot
+ * and related data structures first. This call does that.
+ * Refer to sec 4.3.2 in xHCI spec rev1.0
+ */
+ err = usb_alloc_device(dev);
+ if (err) {
+ printf("Cannot allocate device context to get SLOT_ID\n");
+ return err;
+ }
+ err = usb_setup_descriptor(dev, do_read);
+ if (err)
+ return err;
+ err = usb_legacy_port_reset(parent, portnr);
+ if (err)
+ return err;
+
dev->devnum = addr;
err = usb_set_address(dev); /* set address */
@@ -1022,45 +1030,49 @@ int usb_new_device(struct usb_device *dev)
if (err < 0) {
printf("\n USB device not accepting new address " \
"(error=%lX)\n", dev->status);
- return -EIO;
+ return err;
}
mdelay(10); /* Let the SET_ADDRESS settle */
- tmp = sizeof(dev->descriptor);
+ return 0;
+}
+
+int usb_select_config(struct usb_device *dev)
+{
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
+ int err;
+
+ err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE);
+ if (err)
+ return err;
- err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
- tmpbuf, sizeof(dev->descriptor));
- if (err < tmp) {
- if (err < 0)
- printf("unable to get device descriptor (error=%d)\n",
- err);
- else
- printf("USB device descriptor short read " \
- "(expected %i, got %i)\n", tmp, err);
- return -EIO;
- }
- memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
/* correct le values */
le16_to_cpus(&dev->descriptor.bcdUSB);
le16_to_cpus(&dev->descriptor.idVendor);
le16_to_cpus(&dev->descriptor.idProduct);
le16_to_cpus(&dev->descriptor.bcdDevice);
+
/* only support for one config for now */
err = usb_get_configuration_no(dev, tmpbuf, 0);
if (err < 0) {
printf("usb_new_device: Cannot read configuration, " \
"skipping device %04x:%04x\n",
dev->descriptor.idVendor, dev->descriptor.idProduct);
- return -EIO;
+ return err;
}
usb_parse_config(dev, tmpbuf, 0);
usb_set_maxpacket(dev);
- /* we set the default configuration here */
- if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
+ /*
+ * we set the default configuration here
+ * This seems premature. If the driver wants a different configuration
+ * it will need to select itself.
+ */
+ err = usb_set_configuration(dev, dev->config.desc.bConfigurationValue);
+ if (err < 0) {
printf("failed to set default configuration " \
"len %d, status %lX\n", dev->act_len, dev->status);
- return -EIO;
+ return err;
}
debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
dev->descriptor.iManufacturer, dev->descriptor.iProduct,
@@ -1080,11 +1092,63 @@ int usb_new_device(struct usb_device *dev)
debug("Manufacturer %s\n", dev->mf);
debug("Product %s\n", dev->prod);
debug("SerialNumber %s\n", dev->serial);
- /* now prode if the device is a hub */
- usb_hub_probe(dev, 0);
+
return 0;
}
+int usb_setup_device(struct usb_device *dev, bool do_read,
+ struct usb_device *parent, int portnr)
+{
+ int addr;
+ int ret;
+
+ /* We still haven't set the Address yet */
+ addr = dev->devnum;
+ dev->devnum = 0;
+
+ ret = usb_prepare_device(dev, addr, do_read, parent, portnr);
+ if (ret)
+ return ret;
+ ret = usb_select_config(dev);
+
+ return ret;
+}
+
+#ifndef CONFIG_DM_USB
+/*
+ * By the time we get here, the device has gotten a new device ID
+ * and is in the default state. We need to identify the thing and
+ * get the ball rolling..
+ *
+ * Returns 0 for success, != 0 for error.
+ */
+int usb_new_device(struct usb_device *dev)
+{
+ bool do_read = true;
+ int err;
+
+ /*
+ * XHCI needs to issue a Address device command to setup
+ * proper device context structures, before it can interact
+ * with the device. So a get_descriptor will fail before any
+ * of that is done for XHCI unlike EHCI.
+ */
+#ifdef CONFIG_USB_XHCI
+ do_read = false;
+#endif
+ err = usb_setup_device(dev, do_read, dev->parent, dev->portnr);
+ if (err)
+ return err;
+
+ /* Now probe if the device is a hub */
+ err = usb_hub_probe(dev, 0);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+#endif
+
__weak
int board_usb_init(int index, enum usb_init_type init)
{
@@ -1096,4 +1160,14 @@ int board_usb_cleanup(int index, enum usb_init_type init)
{
return 0;
}
+
+bool usb_device_has_child_on_port(struct usb_device *parent, int port)
+{
+#ifdef CONFIG_DM_USB
+ return false;
+#else
+ return parent->children[port] != NULL;
+#endif
+}
+
/* EOF */
generated by cgit v1.2.3 (git 2.39.1) at 2025-05-18 08:15:58 +0000