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11237d5e91
First, libpayload expects the keyboard interface index to be 0.
Then, hid_iface_request needs to reply to USB_HID_DT_HID request
with the content of struct usb_hid_descriptor. With current code,
the variable name is generated (and therefore hard to guess), so
we create a new set of macros so that we can use a specific
variable name.
Also, add support for HID Get_Protocol and Set_Protocol, as they
are compulsory for devices supporting boot protocol, even though
those are mostly no-op for now.
Finally, add a note regarding USB HID keyboard boot protocol, to
make sure that we do not accidentally change the report format.
BRANCH=none
BUG=b:36538963
TEST=Keyboard works in FW screen, both trackpad and keyboard
still work when AP has booted.
TEST=hammer/staff can still be updated (both RO from RW, and RW
from RO)
Change-Id: Ibea4888385909c9ce3b430464e5805c039d4b9ed
Reviewed-on: https://chromium-review.googlesource.com/505796
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "clock.h"
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#include "common.h"
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#include "config.h"
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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "link_defs.h"
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#include "registers.h"
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#include "task.h"
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#include "timer.h"
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#include "util.h"
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#include "usb_descriptor.h"
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#include "usb_hw.h"
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#include "usb_hid.h"
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#include "usb_hid_hw.h"
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/* Console output macro */
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#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
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void hid_tx(int ep)
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{
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/* clear IT */
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STM32_USB_EP(ep) = (STM32_USB_EP(ep) & EP_MASK);
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}
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void hid_reset(int ep, usb_uint *hid_ep_buf, int len)
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{
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int i;
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/* HID interrupt endpoint 1 */
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btable_ep[ep].tx_addr = usb_sram_addr(hid_ep_buf);
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btable_ep[ep].tx_count = len;
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for (i = 0; i < (len+1)/2; i++)
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hid_ep_buf[i] = 0;
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STM32_USB_EP(ep) = (ep << 0) /* Endpoint Address */ |
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(3 << 4) /* TX Valid */ |
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(3 << 9) /* interrupt EP */ |
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(0 << 12) /* RX Disabled */;
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}
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/*
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* Keep track of state in case we need to be called multiple times,
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* if the report length is bigger than 64 bytes.
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*/
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static int report_left;
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static const uint8_t *report_ptr;
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int hid_iface_request(usb_uint *ep0_buf_rx, usb_uint *ep0_buf_tx,
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const uint8_t *report_desc, int report_size,
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const struct usb_hid_descriptor *hid_desc)
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{
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if (!ep0_buf_rx) {
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/*
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* Continue previous transfer. We ignore report_desc/size here,
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* which is fine as only one GET_DESCRIPTOR command comes at a
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* time.
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*/
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if (report_left == 0)
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return -1;
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report_size = MIN(USB_MAX_PACKET_SIZE, report_left);
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memcpy_to_usbram((void *) usb_sram_addr(ep0_buf_tx),
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report_ptr, report_size);
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btable_ep[0].tx_count = report_size;
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report_left -= report_size;
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report_ptr += report_size;
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STM32_TOGGLE_EP(0, EP_TX_MASK, EP_TX_VALID,
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report_left ? 0 : EP_STATUS_OUT);
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return report_left ? 1 : 0;
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} else if (ep0_buf_rx[0] == (USB_DIR_IN | USB_RECIP_INTERFACE |
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(USB_REQ_GET_DESCRIPTOR << 8))) {
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if (ep0_buf_rx[1] == (USB_HID_DT_REPORT << 8)) {
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/* Setup : HID specific : Get Report descriptor */
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report_size = MIN(ep0_buf_rx[3], report_size);
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if (report_size > USB_MAX_PACKET_SIZE) {
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/* Report descriptor doesn't fit in 1 packet. */
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report_left = report_size - USB_MAX_PACKET_SIZE;
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report_ptr = report_desc + USB_MAX_PACKET_SIZE;
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report_size = USB_MAX_PACKET_SIZE;
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} else {
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report_left = 0;
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}
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memcpy_to_usbram((void *) usb_sram_addr(ep0_buf_tx),
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report_desc, report_size);
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btable_ep[0].tx_count = report_size;
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STM32_TOGGLE_EP(0, EP_TX_RX_MASK, EP_TX_RX_VALID,
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report_left ? 0 : EP_STATUS_OUT);
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return report_left ? 1 : 0;
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} else if (ep0_buf_rx[1] == (USB_HID_DT_HID << 8)) {
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/* Setup : HID specific : Get HID descriptor */
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memcpy_to_usbram((void *) usb_sram_addr(ep0_buf_tx),
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hid_desc, sizeof(*hid_desc));
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btable_ep[0].tx_count = sizeof(*hid_desc);
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STM32_TOGGLE_EP(0, EP_TX_RX_MASK, EP_TX_RX_VALID,
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EP_STATUS_OUT);
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return 0;
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}
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}
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return -1;
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}
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