| 1 | /*
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| 2 | * Copyright (c) 2010 Vojtech Horky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libusb usb
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | * @brief USB driver - standard USB requests (implementation).
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| 34 | */
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| 35 | #include <usb/usbdrv.h>
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| 36 | #include <errno.h>
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| 37 |
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| 38 | /** Change address of connected device.
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| 39 | *
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| 40 | * @see usb_drv_reserve_default_address
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| 41 | * @see usb_drv_release_default_address
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| 42 | * @see usb_drv_request_address
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| 43 | * @see usb_drv_release_address
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| 44 | * @see usb_drv_bind_address
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| 45 | *
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| 46 | * @param phone Open phone to HC driver.
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| 47 | * @param old_address Current address.
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| 48 | * @param address Address to be set.
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| 49 | * @return Error code.
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| 50 | */
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| 51 | int usb_drv_req_set_address(int phone, usb_address_t old_address,
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| 52 | usb_address_t new_address)
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| 53 | {
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| 54 | /* Prepare the target. */
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| 55 | usb_target_t target = {
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| 56 | .address = old_address,
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| 57 | .endpoint = 0
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| 58 | };
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| 59 |
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| 60 | /* Prepare the setup packet. */
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| 61 | usb_device_request_setup_packet_t setup_packet = {
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| 62 | .request_type = 0,
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| 63 | .request = USB_DEVREQ_SET_ADDRESS,
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| 64 | .index = 0,
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| 65 | .length = 0,
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| 66 | };
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| 67 | setup_packet.value = new_address;
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| 68 |
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| 69 | int rc = usb_drv_psync_control_write(phone, target,
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| 70 | &setup_packet, sizeof(setup_packet), NULL, 0);
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| 71 |
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| 72 | return rc;
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| 73 | }
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| 74 |
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| 75 | /** Retrieve device descriptor of connected USB device.
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| 76 | *
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| 77 | * @param[in] phone Open phone to HC driver.
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| 78 | * @param[in] address Device USB address.
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| 79 | * @param[out] descriptor Storage for the device descriptor.
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| 80 | * @return Error code.
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| 81 | * @retval EBADMEM @p descriptor is NULL.
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| 82 | */
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| 83 | int usb_drv_req_get_device_descriptor(int phone, usb_address_t address,
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| 84 | usb_standard_device_descriptor_t *descriptor)
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| 85 | {
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| 86 | if (descriptor == NULL) {
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| 87 | return EBADMEM;
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| 88 | }
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| 89 |
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| 90 | /* Prepare the target. */
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| 91 | usb_target_t target = {
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| 92 | .address = address,
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| 93 | .endpoint = 0
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| 94 | };
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| 95 |
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| 96 | /* Prepare the setup packet. */
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| 97 | usb_device_request_setup_packet_t setup_packet = {
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| 98 | .request_type = 128,
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| 99 | .request = USB_DEVREQ_GET_DESCRIPTOR,
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| 100 | .index = 0,
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| 101 | .length = sizeof(usb_standard_device_descriptor_t)
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| 102 | };
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| 103 | setup_packet.value_high = USB_DESCTYPE_DEVICE;
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| 104 | setup_packet.value_low = 0;
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| 105 |
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| 106 | /* Prepare local descriptor. */
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| 107 | size_t actually_transferred = 0;
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| 108 | usb_standard_device_descriptor_t descriptor_tmp;
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| 109 |
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| 110 | /* Perform the control read transaction. */
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| 111 | int rc = usb_drv_psync_control_read(phone, target,
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| 112 | &setup_packet, sizeof(setup_packet),
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| 113 | &descriptor_tmp, sizeof(descriptor_tmp), &actually_transferred);
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| 114 |
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| 115 | if (rc != EOK) {
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| 116 | return rc;
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| 117 | }
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| 118 |
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| 119 | /* Verify that all data has been transferred. */
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| 120 | if (actually_transferred < sizeof(descriptor_tmp)) {
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| 121 | return ELIMIT;
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| 122 | }
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| 123 |
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| 124 | /* Everything is okay, copy the descriptor. */
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| 125 | memcpy(descriptor, &descriptor_tmp,
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| 126 | sizeof(descriptor_tmp));
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| 127 |
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| 128 | return EOK;
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| 129 | }
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| 130 |
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| 131 |
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| 132 |
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| 133 | /**
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| 134 | * @}
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| 135 | */
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