112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
|
/*
|
||
|
|
* This file is part of the libopencm3 project.
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 Gareth McMullin <gareth@blacksphere.co.nz>
|
||
|
|
* Copyright (C) 2014 Kuldeep Singh Dhaka <kuldeepdhaka9@gmail.com>
|
||
|
|
*
|
||
|
|
* This library is free software: you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This library is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public License
|
||
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <libopencm3/cm3/common.h>
|
||
|
|
#include <libopencm3/stm32/rcc.h>
|
||
|
|
#include <libopencm3/stm32/tools.h>
|
||
|
|
#include <libopencm3/stm32/st_usbfs.h>
|
||
|
|
#include <libopencm3/usb/usbd.h>
|
||
|
|
#include "../usb/usb_private.h"
|
||
|
|
#include "common/st_usbfs_core.h"
|
||
|
|
|
||
|
|
/** Initialize the USB device controller hardware of the STM32. */
|
||
|
|
static usbd_device *st_usbfs_v2_usbd_init(void)
|
||
|
|
{
|
||
|
|
rcc_periph_clock_enable(RCC_USB);
|
||
|
|
SET_REG(USB_CNTR_REG, 0);
|
||
|
|
SET_REG(USB_BTABLE_REG, 0);
|
||
|
|
SET_REG(USB_ISTR_REG, 0);
|
||
|
|
|
||
|
|
/* Enable RESET, SUSPEND, RESUME and CTR interrupts. */
|
||
|
|
SET_REG(USB_CNTR_REG, USB_CNTR_RESETM | USB_CNTR_CTRM |
|
||
|
|
USB_CNTR_SUSPM | USB_CNTR_WKUPM);
|
||
|
|
SET_REG(USB_BCDR_REG, USB_BCDR_DPPU);
|
||
|
|
return &st_usbfs_dev;
|
||
|
|
}
|
||
|
|
|
||
|
|
void st_usbfs_copy_to_pm(volatile void *vPM, const void *buf, uint16_t len)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* This is a bytewise copy, so it always works, even on CM0(+)
|
||
|
|
* that don't support unaligned accesses.
|
||
|
|
*/
|
||
|
|
const uint8_t *lbuf = buf;
|
||
|
|
volatile uint16_t *PM = vPM;
|
||
|
|
uint32_t i;
|
||
|
|
for (i = 0; i < len; i += 2) {
|
||
|
|
*PM++ = (uint16_t)lbuf[i+1] << 8 | lbuf[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Copy a data buffer from packet memory.
|
||
|
|
*
|
||
|
|
* @param buf Destination pointer for data buffer.
|
||
|
|
* @param vPM Source pointer into packet memory.
|
||
|
|
* @param len Number of bytes to copy.
|
||
|
|
*/
|
||
|
|
void st_usbfs_copy_from_pm(void *buf, const volatile void *vPM, uint16_t len)
|
||
|
|
{
|
||
|
|
const volatile uint16_t *PM = vPM;
|
||
|
|
uint8_t odd = len & 1;
|
||
|
|
len >>= 1;
|
||
|
|
|
||
|
|
if (((uintptr_t) buf) & 0x01) {
|
||
|
|
for (; len; PM++, len--) {
|
||
|
|
uint16_t value = *PM;
|
||
|
|
*(uint8_t *) buf++ = value;
|
||
|
|
*(uint8_t *) buf++ = value >> 8;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
for (; len; PM++, buf += 2, len--) {
|
||
|
|
*(uint16_t *) buf = *PM;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (odd) {
|
||
|
|
*(uint8_t *) buf = *(uint8_t *) PM;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void st_usbfs_v2_disconnect(usbd_device *usbd_dev, bool disconnected)
|
||
|
|
{
|
||
|
|
(void)usbd_dev;
|
||
|
|
uint16_t reg = GET_REG(USB_BCDR_REG);
|
||
|
|
if (disconnected) {
|
||
|
|
SET_REG(USB_BCDR_REG, reg | USB_BCDR_DPPU);
|
||
|
|
} else {
|
||
|
|
SET_REG(USB_BCDR_REG, reg & ~USB_BCDR_DPPU);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct _usbd_driver st_usbfs_v2_usb_driver = {
|
||
|
|
.init = st_usbfs_v2_usbd_init,
|
||
|
|
.set_address = st_usbfs_set_address,
|
||
|
|
.ep_setup = st_usbfs_ep_setup,
|
||
|
|
.ep_reset = st_usbfs_endpoints_reset,
|
||
|
|
.ep_stall_set = st_usbfs_ep_stall_set,
|
||
|
|
.ep_stall_get = st_usbfs_ep_stall_get,
|
||
|
|
.ep_nak_set = st_usbfs_ep_nak_set,
|
||
|
|
.ep_write_packet = st_usbfs_ep_write_packet,
|
||
|
|
.ep_read_packet = st_usbfs_ep_read_packet,
|
||
|
|
.disconnect = st_usbfs_v2_disconnect,
|
||
|
|
.poll = st_usbfs_poll,
|
||
|
|
};
|