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/* 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_buf, int len)
{
int i;
/* HID interrupt endpoint 1 */
btable_ep[ep].tx_addr = usb_sram_addr(hid_ep_buf);
btable_ep[ep].tx_count = len;
for (i = 0; i < (len+1)/2; i++)
hid_ep_buf[i] = 0;
STM32_USB_EP(ep) = (ep << 0) /* Endpoint Address */ |
(3 << 4) /* TX Valid */ |
(3 << 9) /* interrupt EP */ |
(0 << 12) /* RX Disabled */;
}
/*
* 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((void *) usb_sram_addr(ep0_buf_tx),
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;
}
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