mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2026-01-05 22:41:44 +00:00
e3c1e2265c
In some cases, we want to be able to dynamically modify a few bytes in the USB descriptor (in our case, length of referenced items), but it could also be other things like flags. These 2 new functions allow to keep all the USB descriptor in flash, and modify these few bytes before writing them in the USB buffer. BRANCH=none BUG=b:37447752 TEST=Flash hammer, USB descriptors are valid. Change-Id: I8624255fa43f52a0aaa21d20e963f3974f236912 Signed-off-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/771057 Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/* Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#include "clock.h"
|
|
#include "common.h"
|
|
#include "config.h"
|
|
#include "console.h"
|
|
#include "gpio.h"
|
|
#include "hooks.h"
|
|
#include "link_defs.h"
|
|
#include "registers.h"
|
|
#include "task.h"
|
|
#include "timer.h"
|
|
#include "util.h"
|
|
#include "usb_descriptor.h"
|
|
#include "usb_hw.h"
|
|
#include "usb_hid.h"
|
|
#include "usb_hid_hw.h"
|
|
|
|
/* Console output macro */
|
|
#define CPRINTF(format, args...) cprintf(CC_USB, format, ## args)
|
|
|
|
void hid_tx(int ep)
|
|
{
|
|
/* clear IT */
|
|
STM32_USB_EP(ep) = (STM32_USB_EP(ep) & EP_MASK);
|
|
}
|
|
|
|
void hid_reset(int ep, usb_uint *hid_ep_tx_buf, int tx_len,
|
|
usb_uint *hid_ep_rx_buf, int rx_len)
|
|
{
|
|
int i;
|
|
uint16_t ep_reg;
|
|
|
|
btable_ep[ep].tx_addr = usb_sram_addr(hid_ep_tx_buf);
|
|
btable_ep[ep].tx_count = tx_len;
|
|
|
|
/* STM32 USB SRAM needs to be accessed one U16 at a time */
|
|
for (i = 0; i < DIV_ROUND_UP(tx_len, 2); i++)
|
|
hid_ep_tx_buf[i] = 0;
|
|
|
|
ep_reg = (ep << 0) /* Endpoint Address */ |
|
|
EP_TX_VALID |
|
|
(3 << 9) /* interrupt EP */ |
|
|
EP_RX_DISAB;
|
|
|
|
/* Enable RX for output reports */
|
|
if (hid_ep_rx_buf && rx_len > 0) {
|
|
btable_ep[ep].rx_addr = usb_sram_addr(hid_ep_rx_buf);
|
|
btable_ep[ep].rx_count = ((rx_len + 1) / 2) << 10;
|
|
|
|
ep_reg |= EP_RX_VALID; /* RX Valid */
|
|
}
|
|
|
|
STM32_USB_EP(ep) = ep_reg;
|
|
}
|
|
|
|
/*
|
|
* Keep track of state in case we need to be called multiple times,
|
|
* if the report length is bigger than 64 bytes.
|
|
*/
|
|
static int report_left;
|
|
static const uint8_t *report_ptr;
|
|
|
|
int hid_iface_request(usb_uint *ep0_buf_rx, usb_uint *ep0_buf_tx,
|
|
const uint8_t *report_desc, int report_size,
|
|
const struct usb_hid_descriptor *hid_desc)
|
|
{
|
|
if (!ep0_buf_rx) {
|
|
/*
|
|
* Continue previous transfer. We ignore report_desc/size here,
|
|
* which is fine as only one GET_DESCRIPTOR command comes at a
|
|
* time.
|
|
*/
|
|
if (report_left == 0)
|
|
return -1;
|
|
report_size = MIN(USB_MAX_PACKET_SIZE, report_left);
|
|
memcpy_to_usbram((void *) usb_sram_addr(ep0_buf_tx),
|
|
report_ptr, report_size);
|
|
btable_ep[0].tx_count = report_size;
|
|
report_left -= report_size;
|
|
report_ptr += report_size;
|
|
STM32_TOGGLE_EP(0, EP_TX_MASK, EP_TX_VALID,
|
|
report_left ? 0 : EP_STATUS_OUT);
|
|
return report_left ? 1 : 0;
|
|
} else if (ep0_buf_rx[0] == (USB_DIR_IN | USB_RECIP_INTERFACE |
|
|
(USB_REQ_GET_DESCRIPTOR << 8))) {
|
|
if (ep0_buf_rx[1] == (USB_HID_DT_REPORT << 8)) {
|
|
/* Setup : HID specific : Get Report descriptor */
|
|
report_size = MIN(ep0_buf_rx[3], report_size);
|
|
|
|
if (report_size > USB_MAX_PACKET_SIZE) {
|
|
/* Report descriptor doesn't fit in 1 packet. */
|
|
report_left = report_size - USB_MAX_PACKET_SIZE;
|
|
report_ptr = report_desc + USB_MAX_PACKET_SIZE;
|
|
report_size = USB_MAX_PACKET_SIZE;
|
|
} else {
|
|
report_left = 0;
|
|
}
|
|
memcpy_to_usbram((void *) usb_sram_addr(ep0_buf_tx),
|
|
report_desc, report_size);
|
|
btable_ep[0].tx_count = report_size;
|
|
STM32_TOGGLE_EP(0, EP_TX_RX_MASK, EP_TX_RX_VALID,
|
|
report_left ? 0 : EP_STATUS_OUT);
|
|
return report_left ? 1 : 0;
|
|
} else if (ep0_buf_rx[1] == (USB_HID_DT_HID << 8)) {
|
|
/* Setup : HID specific : Get HID descriptor */
|
|
memcpy_to_usbram_ep0_patch(hid_desc, sizeof(*hid_desc));
|
|
btable_ep[0].tx_count = sizeof(*hid_desc);
|
|
STM32_TOGGLE_EP(0, EP_TX_RX_MASK, EP_TX_RX_VALID,
|
|
EP_STATUS_OUT);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|