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1281 lines
34 KiB
1281 lines
34 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Most of this source has been derived from the Linux USB |
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* project: |
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* (C) Copyright Linus Torvalds 1999 |
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* (C) Copyright Johannes Erdfelt 1999-2001 |
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* (C) Copyright Andreas Gal 1999 |
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* (C) Copyright Gregory P. Smith 1999 |
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* (C) Copyright Deti Fliegl 1999 (new USB architecture) |
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* (C) Copyright Randy Dunlap 2000 |
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* (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id) |
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* (C) Copyright Yggdrasil Computing, Inc. 2000 |
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* (usb_device_id matching changes by Adam J. Richter) |
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* |
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* Adapted for U-Boot: |
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* (C) Copyright 2001 Denis Peter, MPL AG Switzerland |
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*/ |
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|
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/* |
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* How it works: |
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* |
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* Since this is a bootloader, the devices will not be automatic |
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* (re)configured on hotplug, but after a restart of the USB the |
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* device should work. |
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* |
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* For each transfer (except "Interrupt") we wait for completion. |
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*/ |
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#include <common.h> |
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#include <command.h> |
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#include <dm.h> |
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#include <memalign.h> |
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#include <asm/processor.h> |
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#include <linux/compiler.h> |
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#include <linux/ctype.h> |
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#include <asm/byteorder.h> |
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#include <asm/unaligned.h> |
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#include <errno.h> |
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#include <usb.h> |
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|
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#define USB_BUFSIZ 512 |
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|
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static int asynch_allowed; |
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char usb_started; /* flag for the started/stopped USB status */ |
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|
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#ifndef CONFIG_DM_USB |
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static struct usb_device usb_dev[USB_MAX_DEVICE]; |
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static int dev_index; |
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|
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#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT |
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#define CONFIG_USB_MAX_CONTROLLER_COUNT 1 |
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#endif |
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|
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/*************************************************************************** |
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* Init USB Device |
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*/ |
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int usb_init(void) |
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{ |
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void *ctrl; |
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struct usb_device *dev; |
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int i, start_index = 0; |
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int controllers_initialized = 0; |
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int ret; |
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|
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dev_index = 0; |
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asynch_allowed = 1; |
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usb_hub_reset(); |
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|
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/* first make all devices unknown */ |
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for (i = 0; i < USB_MAX_DEVICE; i++) { |
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memset(&usb_dev[i], 0, sizeof(struct usb_device)); |
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usb_dev[i].devnum = -1; |
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} |
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|
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/* init low_level USB */ |
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for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { |
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/* init low_level USB */ |
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printf("USB%d: ", i); |
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ret = usb_lowlevel_init(i, USB_INIT_HOST, &ctrl); |
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if (ret == -ENODEV) { /* No such device. */ |
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puts("Port not available.\n"); |
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controllers_initialized++; |
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continue; |
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} |
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|
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if (ret) { /* Other error. */ |
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puts("lowlevel init failed\n"); |
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continue; |
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} |
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/* |
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* lowlevel init is OK, now scan the bus for devices |
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* i.e. search HUBs and configure them |
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*/ |
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controllers_initialized++; |
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start_index = dev_index; |
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printf("scanning bus %d for devices... ", i); |
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ret = usb_alloc_new_device(ctrl, &dev); |
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if (ret) |
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break; |
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|
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/* |
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* device 0 is always present |
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* (root hub, so let it analyze) |
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*/ |
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ret = usb_new_device(dev); |
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if (ret) |
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usb_free_device(dev->controller); |
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|
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if (start_index == dev_index) { |
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puts("No USB Device found\n"); |
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continue; |
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} else { |
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printf("%d USB Device(s) found\n", |
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dev_index - start_index); |
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} |
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usb_started = 1; |
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} |
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debug("scan end\n"); |
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/* if we were not able to find at least one working bus, bail out */ |
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if (controllers_initialized == 0) |
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puts("USB error: all controllers failed lowlevel init\n"); |
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|
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return usb_started ? 0 : -ENODEV; |
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} |
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|
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/****************************************************************************** |
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* Stop USB this stops the LowLevel Part and deregisters USB devices. |
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*/ |
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int usb_stop(void) |
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{ |
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int i; |
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|
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if (usb_started) { |
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asynch_allowed = 1; |
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usb_started = 0; |
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usb_hub_reset(); |
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|
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for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) { |
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if (usb_lowlevel_stop(i)) |
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printf("failed to stop USB controller %d\n", i); |
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} |
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} |
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|
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return 0; |
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} |
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|
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/****************************************************************************** |
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* Detect if a USB device has been plugged or unplugged. |
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*/ |
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int usb_detect_change(void) |
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{ |
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int i, j; |
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int change = 0; |
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|
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for (j = 0; j < USB_MAX_DEVICE; j++) { |
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for (i = 0; i < usb_dev[j].maxchild; i++) { |
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struct usb_port_status status; |
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|
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if (usb_get_port_status(&usb_dev[j], i + 1, |
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&status) < 0) |
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/* USB request failed */ |
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continue; |
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|
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if (le16_to_cpu(status.wPortChange) & |
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USB_PORT_STAT_C_CONNECTION) |
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change++; |
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} |
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} |
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return change; |
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} |
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|
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/* |
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* disables the asynch behaviour of the control message. This is used for data |
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* transfers that uses the exclusiv access to the control and bulk messages. |
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* Returns the old value so it can be restored later. |
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*/ |
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int usb_disable_asynch(int disable) |
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{ |
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int old_value = asynch_allowed; |
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|
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asynch_allowed = !disable; |
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return old_value; |
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} |
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#endif /* !CONFIG_DM_USB */ |
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|
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/*------------------------------------------------------------------- |
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* Message wrappers. |
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* |
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*/ |
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|
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/* |
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* submits an Interrupt Message |
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*/ |
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int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe, |
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void *buffer, int transfer_len, int interval) |
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{ |
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return submit_int_msg(dev, pipe, buffer, transfer_len, interval); |
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} |
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|
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/* |
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* submits a control message and waits for comletion (at least timeout * 1ms) |
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* If timeout is 0, we don't wait for completion (used as example to set and |
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* clear keyboards LEDs). For data transfers, (storage transfers) we don't |
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* allow control messages with 0 timeout, by previousely resetting the flag |
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* asynch_allowed (usb_disable_asynch(1)). |
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* returns the transferred length if OK or -1 if error. The transferred length |
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* and the current status are stored in the dev->act_len and dev->status. |
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*/ |
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int usb_control_msg(struct usb_device *dev, unsigned int pipe, |
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unsigned char request, unsigned char requesttype, |
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unsigned short value, unsigned short index, |
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void *data, unsigned short size, int timeout) |
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{ |
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ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1); |
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int err; |
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|
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if ((timeout == 0) && (!asynch_allowed)) { |
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/* request for a asynch control pipe is not allowed */ |
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return -EINVAL; |
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} |
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|
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/* set setup command */ |
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setup_packet->requesttype = requesttype; |
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setup_packet->request = request; |
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setup_packet->value = cpu_to_le16(value); |
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setup_packet->index = cpu_to_le16(index); |
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setup_packet->length = cpu_to_le16(size); |
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debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \ |
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"value 0x%X index 0x%X length 0x%X\n", |
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request, requesttype, value, index, size); |
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dev->status = USB_ST_NOT_PROC; /*not yet processed */ |
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|
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err = submit_control_msg(dev, pipe, data, size, setup_packet); |
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if (err < 0) |
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return err; |
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if (timeout == 0) |
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return (int)size; |
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|
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/* |
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* Wait for status to update until timeout expires, USB driver |
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* interrupt handler may set the status when the USB operation has |
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* been completed. |
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*/ |
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while (timeout--) { |
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if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) |
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break; |
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mdelay(1); |
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} |
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if (dev->status) |
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return -1; |
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|
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return dev->act_len; |
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|
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} |
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|
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/*------------------------------------------------------------------- |
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* submits bulk message, and waits for completion. returns 0 if Ok or |
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* negative if Error. |
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* synchronous behavior |
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*/ |
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int usb_bulk_msg(struct usb_device *dev, unsigned int pipe, |
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void *data, int len, int *actual_length, int timeout) |
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{ |
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if (len < 0) |
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return -EINVAL; |
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dev->status = USB_ST_NOT_PROC; /*not yet processed */ |
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if (submit_bulk_msg(dev, pipe, data, len) < 0) |
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return -EIO; |
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while (timeout--) { |
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if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC)) |
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break; |
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mdelay(1); |
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} |
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*actual_length = dev->act_len; |
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if (dev->status == 0) |
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return 0; |
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else |
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return -EIO; |
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} |
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|
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/*------------------------------------------------------------------- |
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* Max Packet stuff |
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*/ |
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|
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/* |
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* returns the max packet size, depending on the pipe direction and |
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* the configurations values |
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*/ |
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int usb_maxpacket(struct usb_device *dev, unsigned long pipe) |
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{ |
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/* direction is out -> use emaxpacket out */ |
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if ((pipe & USB_DIR_IN) == 0) |
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return dev->epmaxpacketout[((pipe>>15) & 0xf)]; |
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else |
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return dev->epmaxpacketin[((pipe>>15) & 0xf)]; |
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} |
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|
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/* |
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* The routine usb_set_maxpacket_ep() is extracted from the loop of routine |
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* usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine |
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* when it is inlined in 1 single routine. What happens is that the register r3 |
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* is used as loop-count 'i', but gets overwritten later on. |
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* This is clearly a compiler bug, but it is easier to workaround it here than |
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* to update the compiler (Occurs with at least several GCC 4.{1,2},x |
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* CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM) |
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* |
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* NOTE: Similar behaviour was observed with GCC4.6 on ARMv5. |
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*/ |
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static void noinline |
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usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx) |
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{ |
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int b; |
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struct usb_endpoint_descriptor *ep; |
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u16 ep_wMaxPacketSize; |
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|
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ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx]; |
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b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK; |
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ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize); |
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|
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if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == |
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USB_ENDPOINT_XFER_CONTROL) { |
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/* Control => bidirectional */ |
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dev->epmaxpacketout[b] = ep_wMaxPacketSize; |
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dev->epmaxpacketin[b] = ep_wMaxPacketSize; |
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debug("##Control EP epmaxpacketout/in[%d] = %d\n", |
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b, dev->epmaxpacketin[b]); |
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} else { |
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if ((ep->bEndpointAddress & 0x80) == 0) { |
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/* OUT Endpoint */ |
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if (ep_wMaxPacketSize > dev->epmaxpacketout[b]) { |
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dev->epmaxpacketout[b] = ep_wMaxPacketSize; |
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debug("##EP epmaxpacketout[%d] = %d\n", |
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b, dev->epmaxpacketout[b]); |
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} |
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} else { |
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/* IN Endpoint */ |
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if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) { |
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dev->epmaxpacketin[b] = ep_wMaxPacketSize; |
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debug("##EP epmaxpacketin[%d] = %d\n", |
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b, dev->epmaxpacketin[b]); |
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} |
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} /* if out */ |
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} /* if control */ |
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} |
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|
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/* |
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* set the max packed value of all endpoints in the given configuration |
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*/ |
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static int usb_set_maxpacket(struct usb_device *dev) |
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{ |
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int i, ii; |
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|
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for (i = 0; i < dev->config.desc.bNumInterfaces; i++) |
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for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++) |
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usb_set_maxpacket_ep(dev, i, ii); |
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|
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return 0; |
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} |
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|
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/******************************************************************************* |
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* Parse the config, located in buffer, and fills the dev->config structure. |
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* Note that all little/big endian swapping are done automatically. |
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* (wTotalLength has already been swapped and sanitized when it was read.) |
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*/ |
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static int usb_parse_config(struct usb_device *dev, |
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unsigned char *buffer, int cfgno) |
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{ |
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struct usb_descriptor_header *head; |
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int index, ifno, epno, curr_if_num; |
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u16 ep_wMaxPacketSize; |
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struct usb_interface *if_desc = NULL; |
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|
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ifno = -1; |
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epno = -1; |
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curr_if_num = -1; |
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|
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dev->configno = cfgno; |
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head = (struct usb_descriptor_header *) &buffer[0]; |
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if (head->bDescriptorType != USB_DT_CONFIG) { |
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printf(" ERROR: NOT USB_CONFIG_DESC %x\n", |
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head->bDescriptorType); |
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return -EINVAL; |
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} |
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if (head->bLength != USB_DT_CONFIG_SIZE) { |
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printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength); |
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return -EINVAL; |
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} |
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memcpy(&dev->config, head, USB_DT_CONFIG_SIZE); |
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dev->config.no_of_if = 0; |
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|
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index = dev->config.desc.bLength; |
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/* Ok the first entry must be a configuration entry, |
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* now process the others */ |
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head = (struct usb_descriptor_header *) &buffer[index]; |
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while (index + 1 < dev->config.desc.wTotalLength && head->bLength) { |
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switch (head->bDescriptorType) { |
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case USB_DT_INTERFACE: |
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if (head->bLength != USB_DT_INTERFACE_SIZE) { |
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printf("ERROR: Invalid USB IF length (%d)\n", |
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head->bLength); |
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break; |
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} |
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if (index + USB_DT_INTERFACE_SIZE > |
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dev->config.desc.wTotalLength) { |
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puts("USB IF descriptor overflowed buffer!\n"); |
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break; |
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} |
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if (((struct usb_interface_descriptor *) \ |
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head)->bInterfaceNumber != curr_if_num) { |
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/* this is a new interface, copy new desc */ |
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ifno = dev->config.no_of_if; |
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if (ifno >= USB_MAXINTERFACES) { |
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puts("Too many USB interfaces!\n"); |
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/* try to go on with what we have */ |
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return -EINVAL; |
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} |
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if_desc = &dev->config.if_desc[ifno]; |
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dev->config.no_of_if++; |
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memcpy(if_desc, head, |
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USB_DT_INTERFACE_SIZE); |
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if_desc->no_of_ep = 0; |
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if_desc->num_altsetting = 1; |
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curr_if_num = |
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if_desc->desc.bInterfaceNumber; |
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} else { |
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/* found alternate setting for the interface */ |
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if (ifno >= 0) { |
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if_desc = &dev->config.if_desc[ifno]; |
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if_desc->num_altsetting++; |
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} |
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} |
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break; |
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case USB_DT_ENDPOINT: |
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if (head->bLength != USB_DT_ENDPOINT_SIZE && |
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head->bLength != USB_DT_ENDPOINT_AUDIO_SIZE) { |
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printf("ERROR: Invalid USB EP length (%d)\n", |
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head->bLength); |
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break; |
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} |
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if (index + head->bLength > |
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dev->config.desc.wTotalLength) { |
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puts("USB EP descriptor overflowed buffer!\n"); |
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break; |
|
} |
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if (ifno < 0) { |
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puts("Endpoint descriptor out of order!\n"); |
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break; |
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} |
|
epno = dev->config.if_desc[ifno].no_of_ep; |
|
if_desc = &dev->config.if_desc[ifno]; |
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if (epno >= USB_MAXENDPOINTS) { |
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printf("Interface %d has too many endpoints!\n", |
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if_desc->desc.bInterfaceNumber); |
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return -EINVAL; |
|
} |
|
/* found an endpoint */ |
|
if_desc->no_of_ep++; |
|
memcpy(&if_desc->ep_desc[epno], head, |
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USB_DT_ENDPOINT_SIZE); |
|
ep_wMaxPacketSize = get_unaligned(&dev->config.\ |
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if_desc[ifno].\ |
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ep_desc[epno].\ |
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wMaxPacketSize); |
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put_unaligned(le16_to_cpu(ep_wMaxPacketSize), |
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&dev->config.\ |
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if_desc[ifno].\ |
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ep_desc[epno].\ |
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wMaxPacketSize); |
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debug("if %d, ep %d\n", ifno, epno); |
|
break; |
|
case USB_DT_SS_ENDPOINT_COMP: |
|
if (head->bLength != USB_DT_SS_EP_COMP_SIZE) { |
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printf("ERROR: Invalid USB EPC length (%d)\n", |
|
head->bLength); |
|
break; |
|
} |
|
if (index + USB_DT_SS_EP_COMP_SIZE > |
|
dev->config.desc.wTotalLength) { |
|
puts("USB EPC descriptor overflowed buffer!\n"); |
|
break; |
|
} |
|
if (ifno < 0 || epno < 0) { |
|
puts("EPC descriptor out of order!\n"); |
|
break; |
|
} |
|
if_desc = &dev->config.if_desc[ifno]; |
|
memcpy(&if_desc->ss_ep_comp_desc[epno], head, |
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USB_DT_SS_EP_COMP_SIZE); |
|
break; |
|
default: |
|
if (head->bLength == 0) |
|
return -EINVAL; |
|
|
|
debug("unknown Description Type : %x\n", |
|
head->bDescriptorType); |
|
|
|
#ifdef DEBUG |
|
{ |
|
unsigned char *ch = (unsigned char *)head; |
|
int i; |
|
|
|
for (i = 0; i < head->bLength; i++) |
|
debug("%02X ", *ch++); |
|
debug("\n\n\n"); |
|
} |
|
#endif |
|
break; |
|
} |
|
index += head->bLength; |
|
head = (struct usb_descriptor_header *)&buffer[index]; |
|
} |
|
return 0; |
|
} |
|
|
|
/*********************************************************************** |
|
* Clears an endpoint |
|
* endp: endpoint number in bits 0-3; |
|
* direction flag in bit 7 (1 = IN, 0 = OUT) |
|
*/ |
|
int usb_clear_halt(struct usb_device *dev, int pipe) |
|
{ |
|
int result; |
|
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); |
|
|
|
/* don't clear if failed */ |
|
if (result < 0) |
|
return result; |
|
|
|
/* |
|
* 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; |
|
} |
|
|
|
|
|
/********************************************************************** |
|
* get_descriptor type |
|
*/ |
|
static int usb_get_descriptor(struct usb_device *dev, unsigned char type, |
|
unsigned char index, void *buf, int size) |
|
{ |
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN, |
|
(type << 8) + index, 0, buf, size, |
|
USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/********************************************************************** |
|
* gets len of configuration cfgno |
|
*/ |
|
int usb_get_configuration_len(struct usb_device *dev, int cfgno) |
|
{ |
|
int result; |
|
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, 9); |
|
struct usb_config_descriptor *config; |
|
|
|
config = (struct usb_config_descriptor *)&buffer[0]; |
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9); |
|
if (result < 9) { |
|
if (result < 0) |
|
printf("unable to get descriptor, error %lX\n", |
|
dev->status); |
|
else |
|
printf("config descriptor too short " \ |
|
"(expected %i, got %i)\n", 9, result); |
|
return -EIO; |
|
} |
|
return le16_to_cpu(config->wTotalLength); |
|
} |
|
|
|
/********************************************************************** |
|
* gets configuration cfgno and store it in the buffer |
|
*/ |
|
int usb_get_configuration_no(struct usb_device *dev, int cfgno, |
|
unsigned char *buffer, int length) |
|
{ |
|
int result; |
|
struct usb_config_descriptor *config; |
|
|
|
config = (struct usb_config_descriptor *)&buffer[0]; |
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length); |
|
debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result, |
|
le16_to_cpu(config->wTotalLength)); |
|
config->wTotalLength = result; /* validated, with CPU byte order */ |
|
|
|
return result; |
|
} |
|
|
|
/******************************************************************** |
|
* set address of a device to the value in dev->devnum. |
|
* This can only be done by addressing the device via the default address (0) |
|
*/ |
|
static int usb_set_address(struct usb_device *dev) |
|
{ |
|
debug("set address %d\n", dev->devnum); |
|
|
|
return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS, |
|
0, (dev->devnum), 0, NULL, 0, USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/******************************************************************** |
|
* set interface number to interface |
|
*/ |
|
int usb_set_interface(struct usb_device *dev, int interface, int alternate) |
|
{ |
|
struct usb_interface *if_face = NULL; |
|
int ret, i; |
|
|
|
for (i = 0; i < dev->config.desc.bNumInterfaces; i++) { |
|
if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) { |
|
if_face = &dev->config.if_desc[i]; |
|
break; |
|
} |
|
} |
|
if (!if_face) { |
|
printf("selecting invalid interface %d", interface); |
|
return -EINVAL; |
|
} |
|
/* |
|
* We should return now for devices with only one alternate setting. |
|
* According to 9.4.10 of the Universal Serial Bus Specification |
|
* Revision 2.0 such devices can return with a STALL. This results in |
|
* some USB sticks timeouting during initialization and then being |
|
* unusable in U-Boot. |
|
*/ |
|
if (if_face->num_altsetting == 1) |
|
return 0; |
|
|
|
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
|
USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, |
|
alternate, interface, NULL, 0, |
|
USB_CNTL_TIMEOUT * 5); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
/******************************************************************** |
|
* set configuration number to configuration |
|
*/ |
|
static int usb_set_configuration(struct usb_device *dev, int configuration) |
|
{ |
|
int res; |
|
debug("set configuration %d\n", configuration); |
|
/* set setup command */ |
|
res = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
|
USB_REQ_SET_CONFIGURATION, 0, |
|
configuration, 0, |
|
NULL, 0, USB_CNTL_TIMEOUT); |
|
if (res == 0) { |
|
dev->toggle[0] = 0; |
|
dev->toggle[1] = 0; |
|
return 0; |
|
} else |
|
return -EIO; |
|
} |
|
|
|
/******************************************************************** |
|
* set protocol to protocol |
|
*/ |
|
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol) |
|
{ |
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
|
USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
|
protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/******************************************************************** |
|
* set idle |
|
*/ |
|
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id) |
|
{ |
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
|
USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
|
(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/******************************************************************** |
|
* get report |
|
*/ |
|
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, |
|
unsigned char id, void *buf, int size) |
|
{ |
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
|
USB_REQ_GET_REPORT, |
|
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE, |
|
(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/******************************************************************** |
|
* get class descriptor |
|
*/ |
|
int usb_get_class_descriptor(struct usb_device *dev, int ifnum, |
|
unsigned char type, unsigned char id, void *buf, int size) |
|
{ |
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), |
|
USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN, |
|
(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT); |
|
} |
|
|
|
/******************************************************************** |
|
* get string index in buffer |
|
*/ |
|
static int usb_get_string(struct usb_device *dev, unsigned short langid, |
|
unsigned char index, void *buf, int size) |
|
{ |
|
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 = -EINVAL; |
|
|
|
return rc; |
|
} |
|
|
|
|
|
/******************************************************************** |
|
* usb_string: |
|
* Get string index and translate it to ascii. |
|
* returns string length (> 0) or error (< 0) |
|
*/ |
|
int usb_string(struct usb_device *dev, int index, char *buf, size_t size) |
|
{ |
|
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ); |
|
unsigned char *tbuf; |
|
int err; |
|
unsigned int u, idx; |
|
|
|
if (size <= 0 || !buf || !index) |
|
return -EINVAL; |
|
buf[0] = 0; |
|
tbuf = &mybuf[0]; |
|
|
|
/* get langid for strings if it's not yet known */ |
|
if (!dev->have_langid) { |
|
err = usb_string_sub(dev, 0, 0, tbuf); |
|
if (err < 0) { |
|
debug("error getting string descriptor 0 " \ |
|
"(error=%lx)\n", dev->status); |
|
return -EIO; |
|
} else if (tbuf[0] < 4) { |
|
debug("string descriptor 0 too short\n"); |
|
return -EIO; |
|
} else { |
|
dev->have_langid = -1; |
|
dev->string_langid = tbuf[2] | (tbuf[3] << 8); |
|
/* always use the first langid listed */ |
|
debug("USB device number %d default " \ |
|
"language ID 0x%x\n", |
|
dev->devnum, dev->string_langid); |
|
} |
|
} |
|
|
|
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) |
|
break; |
|
if (tbuf[u+1]) /* high byte */ |
|
buf[idx++] = '?'; /* non-ASCII character */ |
|
else |
|
buf[idx++] = tbuf[u]; |
|
} |
|
buf[idx] = 0; |
|
err = idx; |
|
return err; |
|
} |
|
|
|
|
|
/******************************************************************** |
|
* USB device handling: |
|
* 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 |
|
*/ |
|
struct usb_device *usb_get_dev_index(int index) |
|
{ |
|
if (usb_dev[index].devnum == -1) |
|
return NULL; |
|
else |
|
return &usb_dev[index]; |
|
} |
|
|
|
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 -ENOSPC; |
|
} |
|
/* default Address is 0, real addresses start with 1 */ |
|
usb_dev[dev_index].devnum = dev_index + 1; |
|
usb_dev[dev_index].maxchild = 0; |
|
for (i = 0; i < USB_MAXCHILDREN; i++) |
|
usb_dev[dev_index].children[i] = NULL; |
|
usb_dev[dev_index].parent = NULL; |
|
usb_dev[dev_index].controller = controller; |
|
dev_index++; |
|
*devp = &usb_dev[dev_index - 1]; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Free the newly created device node. |
|
* Called in error cases where configuring a newly attached |
|
* device fails for some reason. |
|
*/ |
|
void usb_free_device(struct udevice *controller) |
|
{ |
|
dev_index--; |
|
debug("Freeing device node: %d\n", dev_index); |
|
memset(&usb_dev[dev_index], 0, sizeof(struct usb_device)); |
|
usb_dev[dev_index].devnum = -1; |
|
} |
|
|
|
/* |
|
* XHCI issues Enable Slot command and thereafter |
|
* allocates device contexts. Provide a weak alias |
|
* function for the purpose, so that XHCI overrides it |
|
* and EHCI/OHCI just work out of the box. |
|
*/ |
|
__weak int usb_alloc_device(struct usb_device *udev) |
|
{ |
|
return 0; |
|
} |
|
#endif /* !CONFIG_DM_USB */ |
|
|
|
static int usb_hub_port_reset(struct usb_device *dev, struct usb_device *hub) |
|
{ |
|
if (!hub) |
|
usb_reset_root_port(dev); |
|
|
|
return 0; |
|
} |
|
|
|
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, sizeof(dev->descriptor)); |
|
|
|
return 0; |
|
} |
|
|
|
static int usb_setup_descriptor(struct usb_device *dev, bool do_read) |
|
{ |
|
/* |
|
* 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 |
|
*/ |
|
|
|
/* |
|
* 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. |
|
*/ |
|
|
|
if (dev->speed == USB_SPEED_LOW) { |
|
dev->descriptor.bMaxPacketSize0 = 8; |
|
dev->maxpacketsize = PACKET_SIZE_8; |
|
} else { |
|
dev->descriptor.bMaxPacketSize0 = 64; |
|
dev->maxpacketsize = PACKET_SIZE_64; |
|
} |
|
dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; |
|
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0; |
|
|
|
if (do_read && dev->speed == USB_SPEED_FULL) { |
|
int err; |
|
|
|
/* |
|
* 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; |
|
} |
|
|
|
dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0; |
|
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0; |
|
switch (dev->descriptor.bMaxPacketSize0) { |
|
case 8: |
|
dev->maxpacketsize = PACKET_SIZE_8; |
|
break; |
|
case 16: |
|
dev->maxpacketsize = PACKET_SIZE_16; |
|
break; |
|
case 32: |
|
dev->maxpacketsize = PACKET_SIZE_32; |
|
break; |
|
case 64: |
|
dev->maxpacketsize = PACKET_SIZE_64; |
|
break; |
|
default: |
|
printf("%s: invalid max packet size\n", __func__); |
|
return -EIO; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int usb_prepare_device(struct usb_device *dev, int addr, bool do_read, |
|
struct usb_device *parent) |
|
{ |
|
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_hub_port_reset(dev, parent); |
|
if (err) |
|
return err; |
|
|
|
dev->devnum = addr; |
|
|
|
err = usb_set_address(dev); /* set address */ |
|
|
|
if (err < 0) { |
|
printf("\n USB device not accepting new address " \ |
|
"(error=%lX)\n", dev->status); |
|
return err; |
|
} |
|
|
|
mdelay(10); /* Let the SET_ADDRESS settle */ |
|
|
|
/* |
|
* If we haven't read device descriptor before, read it here |
|
* after device is assigned an address. This is only applicable |
|
* to xHCI so far. |
|
*/ |
|
if (!do_read) { |
|
err = usb_setup_descriptor(dev, true); |
|
if (err) |
|
return err; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int usb_select_config(struct usb_device *dev) |
|
{ |
|
unsigned char *tmpbuf = NULL; |
|
int err; |
|
|
|
err = get_descriptor_len(dev, USB_DT_DEVICE_SIZE, USB_DT_DEVICE_SIZE); |
|
if (err) |
|
return err; |
|
|
|
/* 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); |
|
|
|
/* |
|
* Kingston DT Ultimate 32GB USB 3.0 seems to be extremely sensitive |
|
* about this first Get Descriptor request. If there are any other |
|
* requests in the first microframe, the stick crashes. Wait about |
|
* one microframe duration here (1mS for USB 1.x , 125uS for USB 2.0). |
|
*/ |
|
mdelay(1); |
|
|
|
/* only support for one config for now */ |
|
err = usb_get_configuration_len(dev, 0); |
|
if (err >= 0) { |
|
tmpbuf = (unsigned char *)malloc_cache_aligned(err); |
|
if (!tmpbuf) |
|
err = -ENOMEM; |
|
else |
|
err = usb_get_configuration_no(dev, 0, tmpbuf, err); |
|
} |
|
if (err < 0) { |
|
printf("usb_new_device: Cannot read configuration, " \ |
|
"skipping device %04x:%04x\n", |
|
dev->descriptor.idVendor, dev->descriptor.idProduct); |
|
free(tmpbuf); |
|
return err; |
|
} |
|
usb_parse_config(dev, tmpbuf, 0); |
|
free(tmpbuf); |
|
usb_set_maxpacket(dev); |
|
/* |
|
* 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 err; |
|
} |
|
|
|
/* |
|
* Wait until the Set Configuration request gets processed by the |
|
* device. This is required by at least SanDisk Cruzer Pop USB 2.0 |
|
* and Kingston DT Ultimate 32GB USB 3.0 on DWC2 OTG controller. |
|
*/ |
|
mdelay(10); |
|
|
|
debug("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n", |
|
dev->descriptor.iManufacturer, dev->descriptor.iProduct, |
|
dev->descriptor.iSerialNumber); |
|
memset(dev->mf, 0, sizeof(dev->mf)); |
|
memset(dev->prod, 0, sizeof(dev->prod)); |
|
memset(dev->serial, 0, sizeof(dev->serial)); |
|
if (dev->descriptor.iManufacturer) |
|
usb_string(dev, dev->descriptor.iManufacturer, |
|
dev->mf, sizeof(dev->mf)); |
|
if (dev->descriptor.iProduct) |
|
usb_string(dev, dev->descriptor.iProduct, |
|
dev->prod, sizeof(dev->prod)); |
|
if (dev->descriptor.iSerialNumber) |
|
usb_string(dev, dev->descriptor.iSerialNumber, |
|
dev->serial, sizeof(dev->serial)); |
|
debug("Manufacturer %s\n", dev->mf); |
|
debug("Product %s\n", dev->prod); |
|
debug("SerialNumber %s\n", dev->serial); |
|
|
|
return 0; |
|
} |
|
|
|
int usb_setup_device(struct usb_device *dev, bool do_read, |
|
struct usb_device *parent) |
|
{ |
|
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); |
|
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_HCD |
|
do_read = false; |
|
#endif |
|
err = usb_setup_device(dev, do_read, dev->parent); |
|
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) |
|
{ |
|
return 0; |
|
} |
|
|
|
__weak |
|
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 |
|
} |
|
|
|
#ifdef CONFIG_DM_USB |
|
void usb_find_usb2_hub_address_port(struct usb_device *udev, |
|
uint8_t *hub_address, uint8_t *hub_port) |
|
{ |
|
struct udevice *parent; |
|
struct usb_device *uparent, *ttdev; |
|
|
|
/* |
|
* When called from usb-uclass.c: usb_scan_device() udev->dev points |
|
* to the parent udevice, not the actual udevice belonging to the |
|
* udev as the device is not instantiated yet. So when searching |
|
* for the first usb-2 parent start with udev->dev not |
|
* udev->dev->parent . |
|
*/ |
|
ttdev = udev; |
|
parent = udev->dev; |
|
uparent = dev_get_parent_priv(parent); |
|
|
|
while (uparent->speed != USB_SPEED_HIGH) { |
|
struct udevice *dev = parent; |
|
|
|
if (device_get_uclass_id(dev->parent) != UCLASS_USB_HUB) { |
|
printf("Error: Cannot find high speed parent of usb-1 device\n"); |
|
*hub_address = 0; |
|
*hub_port = 0; |
|
return; |
|
} |
|
|
|
ttdev = dev_get_parent_priv(dev); |
|
parent = dev->parent; |
|
uparent = dev_get_parent_priv(parent); |
|
} |
|
*hub_address = uparent->devnum; |
|
*hub_port = ttdev->portnr; |
|
} |
|
#else |
|
void usb_find_usb2_hub_address_port(struct usb_device *udev, |
|
uint8_t *hub_address, uint8_t *hub_port) |
|
{ |
|
/* Find out the nearest parent which is high speed */ |
|
while (udev->parent->parent != NULL) |
|
if (udev->parent->speed != USB_SPEED_HIGH) { |
|
udev = udev->parent; |
|
} else { |
|
*hub_address = udev->parent->devnum; |
|
*hub_port = udev->portnr; |
|
return; |
|
} |
|
|
|
printf("Error: Cannot find high speed parent of usb-1 device\n"); |
|
*hub_address = 0; |
|
*hub_port = 0; |
|
} |
|
#endif |
|
|
|
|
|
/* EOF */
|
|
|