mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 00:18:51 +09:00
![Hans de Goede](/assets/img/avatar_default.png)
This commit fixes a number of issues with the reset sequence of musb-new in host mode: 1) Our usb device probe relies on a second device reset being done after the first descriptors read. Factor the musb reset code into a usb_reset_root_port function (and add this as an empty define for other controllers), and call this when a device has no parent. 2) Just like with normal usb controllers there needs to be a delay after reset, for normal usb controllers, this is handled in hub_port_reset, add a delay to usb_reset_root_port. 3) Sync the musb reset sequence with the upstream kernel, clear all bits of power except bits 4-7, and increase the time reset is asserted to 50 ms. With these fixes an usb keyboard I have now always enumerates properly, where as earlier it would only enumerare properly once every 5 tries. Signed-off-by: Hans de Goede <hdegoede@redhat.com>
1070 lines
29 KiB
C
1070 lines
29 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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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 <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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#ifdef CONFIG_4xx
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#include <asm/4xx_pci.h>
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#endif
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#define USB_BUFSIZ 512
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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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static int asynch_allowed;
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char usb_started; /* flag for the started/stopped USB status */
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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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* 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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dev_index = 0;
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asynch_allowed = 1;
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usb_hub_reset();
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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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/* 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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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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dev = usb_alloc_new_device(ctrl);
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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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if (dev)
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usb_new_device(dev);
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if (start_index == dev_index)
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puts("No USB Device found\n");
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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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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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return usb_started ? 0 : -1;
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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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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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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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return 0;
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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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asynch_allowed = !disable;
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return old_value;
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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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* 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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* 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 transfered length if OK or -1 if error. The transfered 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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if ((timeout == 0) && (!asynch_allowed)) {
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/* request for a asynch control pipe is not allowed */
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return -1;
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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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if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0)
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return -1;
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if (timeout == 0)
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return (int)size;
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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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return dev->act_len;
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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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* -1 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 -1;
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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 -1;
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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 -1;
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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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* 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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* 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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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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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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* 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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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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return 0;
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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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ifno = -1;
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epno = -1;
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curr_if_num = -1;
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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 -1;
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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 -1;
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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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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 1;
|
|
}
|
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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);
|
|
if_desc->no_of_ep = 0;
|
|
if_desc->num_altsetting = 1;
|
|
curr_if_num =
|
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if_desc->desc.bInterfaceNumber;
|
|
} else {
|
|
/* found alternate setting for the interface */
|
|
if (ifno >= 0) {
|
|
if_desc = &dev->config.if_desc[ifno];
|
|
if_desc->num_altsetting++;
|
|
}
|
|
}
|
|
break;
|
|
case USB_DT_ENDPOINT:
|
|
if (head->bLength != USB_DT_ENDPOINT_SIZE) {
|
|
printf("ERROR: Invalid USB EP length (%d)\n",
|
|
head->bLength);
|
|
break;
|
|
}
|
|
if (index + USB_DT_ENDPOINT_SIZE >
|
|
dev->config.desc.wTotalLength) {
|
|
puts("USB EP descriptor overflowed buffer!\n");
|
|
break;
|
|
}
|
|
if (ifno < 0) {
|
|
puts("Endpoint descriptor out of order!\n");
|
|
break;
|
|
}
|
|
epno = dev->config.if_desc[ifno].no_of_ep;
|
|
if_desc = &dev->config.if_desc[ifno];
|
|
if (epno > USB_MAXENDPOINTS) {
|
|
printf("Interface %d has too many endpoints!\n",
|
|
if_desc->desc.bInterfaceNumber);
|
|
return 1;
|
|
}
|
|
/* found an endpoint */
|
|
if_desc->no_of_ep++;
|
|
memcpy(&if_desc->ep_desc[epno], head,
|
|
USB_DT_ENDPOINT_SIZE);
|
|
ep_wMaxPacketSize = get_unaligned(&dev->config.\
|
|
if_desc[ifno].\
|
|
ep_desc[epno].\
|
|
wMaxPacketSize);
|
|
put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
|
|
&dev->config.\
|
|
if_desc[ifno].\
|
|
ep_desc[epno].\
|
|
wMaxPacketSize);
|
|
debug("if %d, ep %d\n", ifno, epno);
|
|
break;
|
|
case USB_DT_SS_ENDPOINT_COMP:
|
|
if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
|
|
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,
|
|
USB_DT_SS_EP_COMP_SIZE);
|
|
break;
|
|
default:
|
|
if (head->bLength == 0)
|
|
return 1;
|
|
|
|
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 1;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* 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)
|
|
{
|
|
int res;
|
|
res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
|
|
(type << 8) + index, 0,
|
|
buf, size, USB_CNTL_TIMEOUT);
|
|
return res;
|
|
}
|
|
|
|
/**********************************************************************
|
|
* gets configuration cfgno and store it in the buffer
|
|
*/
|
|
int usb_get_configuration_no(struct usb_device *dev,
|
|
unsigned char *buffer, int cfgno)
|
|
{
|
|
int result;
|
|
unsigned int length;
|
|
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 -1;
|
|
}
|
|
length = le16_to_cpu(config->wTotalLength);
|
|
|
|
if (length > USB_BUFSIZ) {
|
|
printf("%s: failed to get descriptor - too long: %d\n",
|
|
__func__, length);
|
|
return -1;
|
|
}
|
|
|
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
|
|
debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result, length);
|
|
config->wTotalLength = length; /* 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)
|
|
{
|
|
int res;
|
|
|
|
debug("set address %d\n", dev->devnum);
|
|
res = usb_control_msg(dev, usb_snddefctrl(dev),
|
|
USB_REQ_SET_ADDRESS, 0,
|
|
(dev->devnum), 0,
|
|
NULL, 0, USB_CNTL_TIMEOUT);
|
|
return res;
|
|
}
|
|
|
|
/********************************************************************
|
|
* 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 -1;
|
|
}
|
|
/*
|
|
* 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 -1;
|
|
}
|
|
|
|
/********************************************************************
|
|
* 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 = -1;
|
|
|
|
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 -1;
|
|
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 -1;
|
|
} else if (tbuf[0] < 4) {
|
|
debug("string descriptor 0 too short\n");
|
|
return -1;
|
|
} 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].
|
|
*/
|
|
|
|
|
|
/* 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];
|
|
}
|
|
|
|
/* 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 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;
|
|
}
|
|
/* 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++;
|
|
return &usb_dev[dev_index - 1];
|
|
}
|
|
|
|
/*
|
|
* Free the newly created device node.
|
|
* Called in error cases where configuring a newly attached
|
|
* device fails for some reason.
|
|
*/
|
|
void usb_free_device(void)
|
|
{
|
|
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;
|
|
}
|
|
/*
|
|
* 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)
|
|
{
|
|
int addr, err;
|
|
int tmp;
|
|
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
|
|
|
|
/*
|
|
* 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 -1;
|
|
}
|
|
|
|
/* We still haven't set the Address yet */
|
|
addr = dev->devnum;
|
|
dev->devnum = 0;
|
|
|
|
#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 1;
|
|
}
|
|
memcpy(&dev->descriptor, tmpbuf, 8);
|
|
#else
|
|
/* 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
|
|
* 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);
|
|
if (err < 0) {
|
|
debug("usb_new_device: usb_get_descriptor() failed\n");
|
|
return 1;
|
|
}
|
|
|
|
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 (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 1;
|
|
}
|
|
} else {
|
|
usb_reset_root_port();
|
|
}
|
|
#endif
|
|
|
|
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;
|
|
}
|
|
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 1;
|
|
}
|
|
|
|
mdelay(10); /* Let the SET_ADDRESS settle */
|
|
|
|
tmp = sizeof(dev->descriptor);
|
|
|
|
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 1;
|
|
}
|
|
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 -1;
|
|
}
|
|
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)) {
|
|
printf("failed to set default configuration " \
|
|
"len %d, status %lX\n", dev->act_len, dev->status);
|
|
return -1;
|
|
}
|
|
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);
|
|
/* now prode if the device is a hub */
|
|
usb_hub_probe(dev, 0);
|
|
return 0;
|
|
}
|
|
|
|
__weak
|
|
int board_usb_init(int index, enum usb_init_type init)
|
|
{
|
|
return 0;
|
|
}
|
|
/* EOF */
|