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authorSascha Hauer <s.hauer@pengutronix.de>2014-07-10 13:48:41 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2014-07-18 14:50:20 +0200
commit16e1d3899cfab2d1d5883372b0c5563dd5697b4b (patch)
treeb8914e8cdee6a1966780eb88ba3610467b8c3d0e
parent7c8c7e5ff344ffb4df21853101731f7d939a2fdd (diff)
downloadbarebox-16e1d3899cfab2d1d5883372b0c5563dd5697b4b.tar.gz
barebox-16e1d3899cfab2d1d5883372b0c5563dd5697b4b.tar.xz
USB: host: hub: Turn into a driver
Since we have a driver model we can make the hub driver a real driver model driver. Put it into a new file to separate the hub from the USB core stuff. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--drivers/usb/core/Makefile3
-rw-r--r--drivers/usb/core/hub.c434
-rw-r--r--drivers/usb/core/hub.h7
-rw-r--r--drivers/usb/core/usb.c424
-rw-r--r--drivers/usb/core/usb.h7
5 files changed, 460 insertions, 415 deletions
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index a74f141db4..dc7e635b0e 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -1,3 +1,2 @@
-
-obj-$(CONFIG_USB_HOST) += usb.o
+obj-$(CONFIG_USB_HOST) += usb.o hub.o
obj-$(CONFIG_OFDEVICE) += of.o
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
new file mode 100644
index 0000000000..0f43955862
--- /dev/null
+++ b/drivers/usb/core/hub.c
@@ -0,0 +1,434 @@
+/*
+ * hub.c - USB hub support
+ *
+ * Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <malloc.h>
+#include <errno.h>
+#include <scsi.h>
+#include <usb/usb.h>
+#include <usb/usb_defs.h>
+
+#include "usb.h"
+#include "hub.h"
+
+#undef USB_HUB_DEBUG
+
+#ifdef USB_HUB_DEBUG
+#define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
+#else
+#define USB_HUB_PRINTF(fmt, args...)
+#endif
+
+#define USB_BUFSIZ 512
+
+static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
+{
+ return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
+ USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
+}
+
+static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
+{
+ return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
+ port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
+{
+ return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
+ port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+static int usb_get_hub_status(struct usb_device *dev, void *data)
+{
+ return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
+ data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+static int usb_get_port_status(struct usb_device *dev, int port, void *data)
+{
+ return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
+ data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+
+static void usb_hub_power_on(struct usb_hub_device *hub)
+{
+ int i;
+ struct usb_device *dev;
+
+ dev = hub->pusb_dev;
+ /* Enable power to the ports */
+ USB_HUB_PRINTF("enabling power on all ports\n");
+ for (i = 0; i < dev->maxchild; i++) {
+ usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
+ USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
+ }
+ /* power on is encoded in 2ms increments -> times 2 for the actual delay */
+ mdelay(hub->desc.bPwrOn2PwrGood*2);
+}
+
+#define MAX_TRIES 5
+
+static inline char *portspeed(int portstatus)
+{
+ if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
+ return "480 Mb/s";
+ else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
+ return "1.5 Mb/s";
+ else
+ return "12 Mb/s";
+}
+
+int hub_port_reset(struct usb_device *dev, int port,
+ unsigned short *portstat)
+{
+ int tries;
+ struct usb_port_status portsts;
+ unsigned short portstatus, portchange;
+
+ 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);
+ wait_ms(200);
+
+ if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
+ USB_HUB_PRINTF("get_port_status failed status %lX\n",
+ dev->status);
+ return -1;
+ }
+ portstatus = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
+
+ USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
+ portstatus, portchange,
+ portspeed(portstatus));
+
+ USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
+ " USB_PORT_STAT_ENABLE %d\n",
+ (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
+ (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
+ (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
+
+ if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
+ !(portstatus & USB_PORT_STAT_CONNECTION))
+ return -1;
+
+ if (portstatus & USB_PORT_STAT_ENABLE)
+ break;
+
+ wait_ms(200);
+ }
+
+ 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 -1;
+ }
+
+ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
+ *portstat = portstatus;
+ return 0;
+}
+
+
+static 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 = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
+ USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
+ portstatus, portchange, portspeed(portstatus));
+
+ /* 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 */
+ usb = usb_alloc_new_device();
+ usb->host = dev->host;
+
+ if (portstatus & USB_PORT_STAT_HIGH_SPEED)
+ usb->speed = USB_SPEED_HIGH;
+ else if (portstatus & USB_PORT_STAT_LOW_SPEED)
+ usb->speed = USB_SPEED_LOW;
+ else
+ usb->speed = USB_SPEED_FULL;
+
+ dev->children[port] = usb;
+ usb->parent = dev;
+ usb->portnr = port + 1;
+
+ /* Run it through the hoops (find a driver, etc) */
+ if (usb_new_device(usb)) {
+ /* Woops, disable the port */
+ USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
+ usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
+ }
+}
+
+static int usb_hub_configure(struct usb_device *dev)
+{
+ unsigned char buffer[USB_BUFSIZ], *bitmap;
+ struct usb_hub_descriptor *descriptor;
+ struct usb_hub_status *hubsts;
+ int i;
+ struct usb_hub_device *hub;
+
+ hub = xzalloc(sizeof (*hub));
+ dev->hub = hub;
+
+ hub->pusb_dev = dev;
+ /* Get the the hub descriptor */
+ if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
+ USB_HUB_PRINTF("%s: failed to get hub " \
+ "descriptor, giving up %lX\n", __func__, dev->status);
+ return -1;
+ }
+ descriptor = (struct usb_hub_descriptor *)buffer;
+
+ /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
+ i = descriptor->bLength;
+ if (i > USB_BUFSIZ) {
+ USB_HUB_PRINTF("%s: failed to get hub " \
+ "descriptor - too long: %d\n", __func__,
+ descriptor->bLength);
+ return -1;
+ }
+
+ if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
+ USB_HUB_PRINTF("%s: failed to get hub " \
+ "descriptor 2nd giving up %lX\n", __func__, dev->status);
+ return -1;
+ }
+ memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
+ /* adjust 16bit values */
+ hub->desc.wHubCharacteristics =
+ le16_to_cpu(descriptor->wHubCharacteristics);
+ /* set the bitmap */
+ bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
+ /* devices not removable by default */
+ memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
+ bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
+ memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
+
+ for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
+ hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
+
+ for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
+ hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
+
+ dev->maxchild = descriptor->bNbrPorts;
+ USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
+
+ switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
+ case 0x00:
+ USB_HUB_PRINTF("ganged power switching\n");
+ break;
+ case 0x01:
+ USB_HUB_PRINTF("individual port power switching\n");
+ break;
+ case 0x02:
+ case 0x03:
+ USB_HUB_PRINTF("unknown reserved power switching mode\n");
+ break;
+ }
+
+ if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
+ USB_HUB_PRINTF("part of a compound device\n");
+ else
+ USB_HUB_PRINTF("standalone hub\n");
+
+ switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
+ case 0x00:
+ USB_HUB_PRINTF("global over-current protection\n");
+ break;
+ case 0x08:
+ USB_HUB_PRINTF("individual port over-current protection\n");
+ break;
+ case 0x10:
+ case 0x18:
+ USB_HUB_PRINTF("no over-current protection\n");
+ break;
+ }
+
+ USB_HUB_PRINTF("power on to power good time: %dms\n",
+ descriptor->bPwrOn2PwrGood * 2);
+ USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
+ descriptor->bHubContrCurrent);
+
+ for (i = 0; i < dev->maxchild; i++)
+ USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
+ hub->desc.DeviceRemovable[(i + 1) / 8] & \
+ (1 << ((i + 1) % 8)) ? " not" : "");
+
+ if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
+ USB_HUB_PRINTF("%s: failed to get Status - " \
+ "too long: %d\n", __func__, descriptor->bLength);
+ return -1;
+ }
+
+ if (usb_get_hub_status(dev, buffer) < 0) {
+ USB_HUB_PRINTF("%s: failed to get Status %lX\n", __func__,
+ dev->status);
+ return -1;
+ }
+
+ hubsts = (struct usb_hub_status *)buffer;
+ USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
+ le16_to_cpu(hubsts->wHubStatus),
+ le16_to_cpu(hubsts->wHubChange));
+ USB_HUB_PRINTF("local power source is %s\n",
+ (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
+ "lost (inactive)" : "good");
+ USB_HUB_PRINTF("%sover-current condition exists\n",
+ (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
+ "" : "no ");
+ usb_hub_power_on(hub);
+
+ for (i = 0; i < dev->maxchild; i++) {
+ struct usb_port_status portsts;
+ unsigned short portstatus, portchange;
+
+ if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
+ USB_HUB_PRINTF("get_port_status failed\n");
+ continue;
+ }
+
+ portstatus = le16_to_cpu(portsts.wPortStatus);
+ portchange = le16_to_cpu(portsts.wPortChange);
+ USB_HUB_PRINTF("Port %d Status %X Change %X\n",
+ i + 1, portstatus, portchange);
+
+ if (portchange & USB_PORT_STAT_C_CONNECTION) {
+ USB_HUB_PRINTF("port %d connection change\n", i + 1);
+ usb_hub_port_connect_change(dev, i);
+ }
+ if (portchange & USB_PORT_STAT_C_ENABLE) {
+ USB_HUB_PRINTF("port %d enable change, status %x\n",
+ i + 1, portstatus);
+ usb_clear_port_feature(dev, i + 1,
+ USB_PORT_FEAT_C_ENABLE);
+
+ /* EM interference sometimes causes bad shielded USB
+ * devices to be shutdown by the hub, this hack enables
+ * them again. Works at least with mouse driver */
+ if (!(portstatus & USB_PORT_STAT_ENABLE) &&
+ (portstatus & USB_PORT_STAT_CONNECTION) &&
+ ((dev->children[i]))) {
+ USB_HUB_PRINTF("already running port %i " \
+ "disabled by hub (EMI?), " \
+ "re-enabling...\n", i + 1);
+ usb_hub_port_connect_change(dev, i);
+ }
+ }
+ if (portstatus & USB_PORT_STAT_SUSPEND) {
+ USB_HUB_PRINTF("port %d suspend change\n", i + 1);
+ usb_clear_port_feature(dev, i + 1,
+ USB_PORT_FEAT_SUSPEND);
+ }
+
+ if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
+ USB_HUB_PRINTF("port %d over-current change\n", i + 1);
+ usb_clear_port_feature(dev, i + 1,
+ USB_PORT_FEAT_C_OVER_CURRENT);
+ usb_hub_power_on(hub);
+ }
+
+ if (portchange & USB_PORT_STAT_C_RESET) {
+ USB_HUB_PRINTF("port %d reset change\n", i + 1);
+ usb_clear_port_feature(dev, i + 1,
+ USB_PORT_FEAT_C_RESET);
+ }
+ } /* end for i all ports */
+
+ return 0;
+}
+
+static int usb_hub_probe(struct usb_device *usbdev,
+ const struct usb_device_id *id)
+{
+ return usb_hub_configure(usbdev);
+}
+
+static void usb_hub_disconnect(struct usb_device *usbdev)
+{
+ free(usbdev->hub);
+}
+
+/* Table with supported devices, most specific first. */
+static struct usb_device_id usb_hubage_usb_ids[] = {
+ {
+ .match_flags = USB_DEVICE_ID_MATCH_INT_CLASS,
+ .bInterfaceClass = USB_CLASS_HUB,
+ },
+ { }
+};
+
+
+/***********************************************************************
+ * USB Storage driver initialization and registration
+ ***********************************************************************/
+
+static struct usb_driver usb_hubage_driver = {
+ .name = "usb-hub",
+ .id_table = usb_hubage_usb_ids,
+ .probe = usb_hub_probe,
+ .disconnect = usb_hub_disconnect,
+};
+
+static int __init usb_hub_init(void)
+{
+ return usb_driver_register(&usb_hubage_driver);
+}
+device_initcall(usb_hub_init);
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
new file mode 100644
index 0000000000..fcf1f0c18a
--- /dev/null
+++ b/drivers/usb/core/hub.h
@@ -0,0 +1,7 @@
+#ifndef __CORE_HUB_H
+#define __CORE_HUB_H
+
+int hub_port_reset(struct usb_device *dev, int port,
+ unsigned short *portstat);
+
+#endif /* __CORE_HUB_H */
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 4f5c0edded..c289bbbc7d 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -52,6 +52,9 @@
#include <usb/usb.h>
+#include "usb.h"
+#include "hub.h"
+
/* #define USB_DEBUG */
#ifdef USB_DEBUG
@@ -65,10 +68,6 @@
static int dev_index;
static int asynch_allowed;
-static int usb_hub_probe(struct usb_device *dev, int ifnum);
-static int hub_port_reset(struct usb_device *dev, int port,
- unsigned short *portstat);
-
static LIST_HEAD(host_list);
LIST_HEAD(usb_device_list);
@@ -291,7 +290,7 @@ static int usb_get_descriptor(struct usb_device *dev, unsigned char type,
*
* Returns 0 for success, != 0 for error.
*/
-static int usb_new_device(struct usb_device *dev)
+int usb_new_device(struct usb_device *dev)
{
int addr, err;
int tmp;
@@ -427,13 +426,14 @@ static int usb_new_device(struct usb_device *dev)
if (dev->host->hw_dev)
dev->dev.parent = dev->host->hw_dev;
- register_device(&dev->dev);
-
- /* now prode if the device is a hub */
- usb_hub_probe(dev, 0);
-
print_usb_device(dev);
+ err = register_device(&dev->dev);
+ if (err) {
+ printf("Failed to register device: %s\n", strerror(-err));
+ return err;
+ }
+
dev_add_param_int_ro(&dev->dev, "iManufacturer",
dev->descriptor->iManufacturer, "%d");
dev_add_param_int_ro(&dev->dev, "iProduct",
@@ -457,7 +457,7 @@ err_out:
return err;
}
-static struct usb_device *usb_alloc_new_device(void)
+struct usb_device *usb_alloc_new_device(void)
{
struct usb_device *usbdev = xzalloc(sizeof (*usbdev));
@@ -911,408 +911,6 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
return err;
}
-/****************************************************************************
- * HUB "Driver"
- * Probes device for being a hub and configurate it
- */
-
-#undef USB_HUB_DEBUG
-
-#ifdef USB_HUB_DEBUG
-#define USB_HUB_PRINTF(fmt, args...) printf(fmt , ##args)
-#else
-#define USB_HUB_PRINTF(fmt, args...)
-#endif
-
-static int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
- USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
-}
-
-static int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
-{
- return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature,
- port, NULL, 0, USB_CNTL_TIMEOUT);
-}
-
-static int usb_set_port_feature(struct usb_device *dev, int port, int feature)
-{
- return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
- USB_REQ_SET_FEATURE, USB_RT_PORT, feature,
- port, NULL, 0, USB_CNTL_TIMEOUT);
-}
-
-static int usb_get_hub_status(struct usb_device *dev, void *data)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
- data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
-}
-
-static int usb_get_port_status(struct usb_device *dev, int port, void *data)
-{
- return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
- USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
- data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
-}
-
-
-static void usb_hub_power_on(struct usb_hub_device *hub)
-{
- int i;
- struct usb_device *dev;
-
- dev = hub->pusb_dev;
- /* Enable power to the ports */
- USB_HUB_PRINTF("enabling power on all ports\n");
- for (i = 0; i < dev->maxchild; i++) {
- usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
- USB_HUB_PRINTF("port %d returns %lX\n", i + 1, dev->status);
- }
- /* power on is encoded in 2ms increments -> times 2 for the actual delay */
- mdelay(hub->desc.bPwrOn2PwrGood*2);
-}
-
-#define MAX_TRIES 5
-
-static inline char *portspeed(int portstatus)
-{
- if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
- return "480 Mb/s";
- else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
- return "1.5 Mb/s";
- else
- return "12 Mb/s";
-}
-
-static int hub_port_reset(struct usb_device *dev, int port,
- unsigned short *portstat)
-{
- int tries;
- struct usb_port_status portsts;
- unsigned short portstatus, portchange;
-
- 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);
- wait_ms(200);
-
- if (usb_get_port_status(dev, port + 1, &portsts) < 0) {
- USB_HUB_PRINTF("get_port_status failed status %lX\n",
- dev->status);
- return -1;
- }
- portstatus = le16_to_cpu(portsts.wPortStatus);
- portchange = le16_to_cpu(portsts.wPortChange);
-
- USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
- portstatus, portchange,
- portspeed(portstatus));
-
- USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d" \
- " USB_PORT_STAT_ENABLE %d\n",
- (portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
- (portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
- (portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
-
- if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
- !(portstatus & USB_PORT_STAT_CONNECTION))
- return -1;
-
- if (portstatus & USB_PORT_STAT_ENABLE)
- break;
-
- wait_ms(200);
- }
-
- 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 -1;
- }
-
- usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
- *portstat = portstatus;
- return 0;
-}
-
-
-static 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 = le16_to_cpu(portsts.wPortStatus);
- portchange = le16_to_cpu(portsts.wPortChange);
- USB_HUB_PRINTF("portstatus %x, change %x, %s\n",
- portstatus, portchange, portspeed(portstatus));
-
- /* 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 */
- usb = usb_alloc_new_device();
- usb->host = dev->host;
-
- if (portstatus & USB_PORT_STAT_HIGH_SPEED)
- usb->speed = USB_SPEED_HIGH;
- else if (portstatus & USB_PORT_STAT_LOW_SPEED)
- usb->speed = USB_SPEED_LOW;
- else
- usb->speed = USB_SPEED_FULL;
-
- dev->children[port] = usb;
- usb->parent = dev;
- usb->portnr = port + 1;
-
- /* Run it through the hoops (find a driver, etc) */
- if (usb_new_device(usb)) {
- /* Woops, disable the port */
- USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
- usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
- }
-}
-
-
-static int usb_hub_configure(struct usb_device *dev)
-{
- unsigned char buffer[USB_BUFSIZ], *bitmap;
- struct usb_hub_descriptor *descriptor;
- struct usb_hub_status *hubsts;
- int i;
- struct usb_hub_device *hub;
-
- hub = xzalloc(sizeof (*hub));
- dev->hub = hub;
-
- hub->pusb_dev = dev;
- /* Get the the hub descriptor */
- if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
- USB_HUB_PRINTF("%s: failed to get hub " \
- "descriptor, giving up %lX\n", __func__, dev->status);
- return -1;
- }
- descriptor = (struct usb_hub_descriptor *)buffer;
-
- /* silence compiler warning if USB_BUFSIZ is > 256 [= sizeof(char)] */
- i = descriptor->bLength;
- if (i > USB_BUFSIZ) {
- USB_HUB_PRINTF("%s: failed to get hub " \
- "descriptor - too long: %d\n", __func__,
- descriptor->bLength);
- return -1;
- }
-
- if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
- USB_HUB_PRINTF("%s: failed to get hub " \
- "descriptor 2nd giving up %lX\n", __func__, dev->status);
- return -1;
- }
- memcpy((unsigned char *)&hub->desc, buffer, descriptor->bLength);
- /* adjust 16bit values */
- hub->desc.wHubCharacteristics =
- le16_to_cpu(descriptor->wHubCharacteristics);
- /* set the bitmap */
- bitmap = (unsigned char *)&hub->desc.DeviceRemovable[0];
- /* devices not removable by default */
- memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8);
- bitmap = (unsigned char *)&hub->desc.PortPowerCtrlMask[0];
- memset(bitmap, 0xff, (USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
-
- for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
- hub->desc.DeviceRemovable[i] = descriptor->DeviceRemovable[i];
-
- for (i = 0; i < ((hub->desc.bNbrPorts + 1 + 7)/8); i++)
- hub->desc.DeviceRemovable[i] = descriptor->PortPowerCtrlMask[i];
-
- dev->maxchild = descriptor->bNbrPorts;
- USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
-
- switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
- case 0x00:
- USB_HUB_PRINTF("ganged power switching\n");
- break;
- case 0x01:
- USB_HUB_PRINTF("individual port power switching\n");
- break;
- case 0x02:
- case 0x03:
- USB_HUB_PRINTF("unknown reserved power switching mode\n");
- break;
- }
-
- if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
- USB_HUB_PRINTF("part of a compound device\n");
- else
- USB_HUB_PRINTF("standalone hub\n");
-
- switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
- case 0x00:
- USB_HUB_PRINTF("global over-current protection\n");
- break;
- case 0x08:
- USB_HUB_PRINTF("individual port over-current protection\n");
- break;
- case 0x10:
- case 0x18:
- USB_HUB_PRINTF("no over-current protection\n");
- break;
- }
-
- USB_HUB_PRINTF("power on to power good time: %dms\n",
- descriptor->bPwrOn2PwrGood * 2);
- USB_HUB_PRINTF("hub controller current requirement: %dmA\n",
- descriptor->bHubContrCurrent);
-
- for (i = 0; i < dev->maxchild; i++)
- USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
- hub->desc.DeviceRemovable[(i + 1) / 8] & \
- (1 << ((i + 1) % 8)) ? " not" : "");
-
- if (sizeof(struct usb_hub_status) > USB_BUFSIZ) {
- USB_HUB_PRINTF("%s: failed to get Status - " \
- "too long: %d\n", __func__, descriptor->bLength);
- return -1;
- }
-
- if (usb_get_hub_status(dev, buffer) < 0) {
- USB_HUB_PRINTF("%s: failed to get Status %lX\n", __func__,
- dev->status);
- return -1;
- }
-
- hubsts = (struct usb_hub_status *)buffer;
- USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
- le16_to_cpu(hubsts->wHubStatus),
- le16_to_cpu(hubsts->wHubChange));
- USB_HUB_PRINTF("local power source is %s\n",
- (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? \
- "lost (inactive)" : "good");
- USB_HUB_PRINTF("%sover-current condition exists\n",
- (le16_to_cpu(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? \
- "" : "no ");
- usb_hub_power_on(hub);
-
- for (i = 0; i < dev->maxchild; i++) {
- struct usb_port_status portsts;
- unsigned short portstatus, portchange;
-
- if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
- USB_HUB_PRINTF("get_port_status failed\n");
- continue;
- }
-
- portstatus = le16_to_cpu(portsts.wPortStatus);
- portchange = le16_to_cpu(portsts.wPortChange);
- USB_HUB_PRINTF("Port %d Status %X Change %X\n",
- i + 1, portstatus, portchange);
-
- if (portchange & USB_PORT_STAT_C_CONNECTION) {
- USB_HUB_PRINTF("port %d connection change\n", i + 1);
- usb_hub_port_connect_change(dev, i);
- }
- if (portchange & USB_PORT_STAT_C_ENABLE) {
- USB_HUB_PRINTF("port %d enable change, status %x\n",
- i + 1, portstatus);
- usb_clear_port_feature(dev, i + 1,
- USB_PORT_FEAT_C_ENABLE);
-
- /* EM interference sometimes causes bad shielded USB
- * devices to be shutdown by the hub, this hack enables
- * them again. Works at least with mouse driver */
- if (!(portstatus & USB_PORT_STAT_ENABLE) &&
- (portstatus & USB_PORT_STAT_CONNECTION) &&
- ((dev->children[i]))) {
- USB_HUB_PRINTF("already running port %i " \
- "disabled by hub (EMI?), " \
- "re-enabling...\n", i + 1);
- usb_hub_port_connect_change(dev, i);
- }
- }
- if (portstatus & USB_PORT_STAT_SUSPEND) {
- USB_HUB_PRINTF("port %d suspend change\n", i + 1);
- usb_clear_port_feature(dev, i + 1,
- USB_PORT_FEAT_SUSPEND);
- }
-
- if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
- USB_HUB_PRINTF("port %d over-current change\n", i + 1);
- usb_clear_port_feature(dev, i + 1,
- USB_PORT_FEAT_C_OVER_CURRENT);
- usb_hub_power_on(hub);
- }
-
- if (portchange & USB_PORT_STAT_C_RESET) {
- USB_HUB_PRINTF("port %d reset change\n", i + 1);
- usb_clear_port_feature(dev, i + 1,
- USB_PORT_FEAT_C_RESET);
- }
- } /* end for i all ports */
-
- return 0;
-}
-
-static int usb_hub_probe(struct usb_device *dev, int ifnum)
-{
- struct usb_interface *iface;
- struct usb_endpoint_descriptor *ep;
- int ret;
-
- iface = &dev->config.interface[ifnum];
- /* Is it a hub? */
- if (iface->desc.bInterfaceClass != USB_CLASS_HUB)
- return 0;
- /* Some hubs have a subclass of 1, which AFAICT according to the */
- /* specs is not defined, but it works */
- if ((iface->desc.bInterfaceSubClass != 0) &&
- (iface->desc.bInterfaceSubClass != 1))
- return 0;
- /* Multiple endpoints? What kind of mutant ninja-hub is this? */
- if (iface->desc.bNumEndpoints != 1)
- return 0;
- ep = &iface->ep_desc[0];
- /* Output endpoint? Curiousier and curiousier.. */
- if (!(ep->bEndpointAddress & USB_DIR_IN))
- return 0;
- /* If it's not an interrupt endpoint, we'd better punt! */
- if ((ep->bmAttributes & 3) != 3)
- return 0;
- /* We found a hub */
- USB_HUB_PRINTF("USB hub found\n");
- ret = usb_hub_configure(dev);
- return ret;
-}
-
int usb_driver_register(struct usb_driver *drv)
{
drv->driver.name = drv->name;
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
new file mode 100644
index 0000000000..3e79407d78
--- /dev/null
+++ b/drivers/usb/core/usb.h
@@ -0,0 +1,7 @@
+#ifndef __CORE_USB_H
+#define __CORE_USB_H
+
+struct usb_device *usb_alloc_new_device(void);
+int usb_new_device(struct usb_device *dev);
+
+#endif /* __CORE_USB_H */