164 lines
4.0 KiB
C
164 lines
4.0 KiB
C
/*
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* This file is part of the libopencm3 project.
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*
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* Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libopencm3/cm3/common.h>
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#include <libopencm3/stm32/tools.h>
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#include <libopencm3/stm32/otg_fs.h>
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#include <libopencm3/usb/usbd.h>
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#include "usb_private.h"
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static void stm32f107_usbd_init(void);
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static void stm32f107_set_address(u8 addr);
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static void stm32f107_ep_setup(u8 addr, u8 type, u16 max_size,
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void (*callback) (u8 ep));
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static void stm32f107_endpoints_reset(void);
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static void stm32f107_ep_stall_set(u8 addr, u8 stall);
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static u8 stm32f107_ep_stall_get(u8 addr);
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static u16 stm32f107_ep_write_packet(u8 addr, const void *buf, u16 len);
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static u16 stm32f107_ep_read_packet(u8 addr, void *buf, u16 len);
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static void stm32f107_poll(void);
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const struct _usbd_driver stm32f107_usb_driver = {
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.init = stm32f107_usbd_init,
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.set_address = stm32f107_set_address,
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.ep_setup = stm32f107_ep_setup,
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.ep_reset = stm32f107_endpoints_reset,
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.ep_stall_set = stm32f107_ep_stall_set,
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.ep_stall_get = stm32f107_ep_stall_get,
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.ep_write_packet = stm32f107_ep_write_packet,
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.ep_read_packet = stm32f107_ep_read_packet,
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.poll = stm32f107_poll,
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};
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/** Initialize the USB device controller hardware of the STM32. */
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static void stm32f107_usbd_init(void)
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{
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/* TODO: Enable interrupts on Reset, Transfer, Suspend and Resume */
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}
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static void stm32f107_set_address(u8 addr)
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{
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(void)addr;
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/* TODO: Set device address and enable. */
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}
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static void stm32f107_ep_setup(u8 addr, u8 type, u16 max_size,
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void (*callback) (u8 ep))
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{
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/* TODO: Configure endpoint address and type.
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* Allocate FIFO memory for endpoint.
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* Install callback funciton.
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*/
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(void)type; (void)max_size;
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u8 dir = addr & 0x80;
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addr &= 0x7f;
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if (dir || (addr == 0)) {
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if (callback) {
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_usbd_device.
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user_callback_ctr[addr][USB_TRANSACTION_IN] =
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(void *)callback;
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}
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}
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if (!dir) {
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if (callback) {
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_usbd_device.
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user_callback_ctr[addr][USB_TRANSACTION_OUT] =
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(void *)callback;
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}
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}
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}
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static void stm32f107_endpoints_reset(void)
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{
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/* TODO: Reset all endpoints. */
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}
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static void stm32f107_ep_stall_set(u8 addr, u8 stall)
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{
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/* TODO: set or clear stall condition */
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(void)addr; (void)stall;
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}
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static u8 stm32f107_ep_stall_get(u8 addr)
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{
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/* TODO: return 1 if STALL set. */
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(void)addr;
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return 0;
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}
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static u16 stm32f107_ep_write_packet(u8 addr, const void *buf, u16 len)
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{
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addr &= 0x7F;
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/* TODO: Send packet on endpoint */
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(void)buf;
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return len;
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}
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static u16 stm32f107_ep_read_packet(u8 addr, void *buf, u16 len)
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{
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/* TODO: Read packet from endpoint */
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(void)addr; (void)buf; (void)len;
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return len;
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}
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static void stm32f107_poll(void)
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{
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/* TODO: Read interrupt status register */
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/* TODO: Handle USB RESET condition */
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if (0) {
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_usbd_reset();
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return;
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}
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/* TODO: Handle transfer complete condition */
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if (0) {
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u8 ep;
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u8 type;
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if (_usbd_device.user_callback_ctr[ep][type])
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_usbd_device.user_callback_ctr[ep][type] (ep);
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/* TODO: clear any interrupt flag */
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}
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/* TODO: Handle suspend condition */
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if (0) {
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/* TODO: Clear suspend interrupt flag */
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if (_usbd_device.user_callback_suspend)
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_usbd_device.user_callback_suspend();
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}
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/* TODO: Handle wakeup condition */
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if (0) {
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/* TODO: Clear wakeup interrupt flag */
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if (_usbd_device.user_callback_resume)
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_usbd_device.user_callback_resume();
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}
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/* TODO: Handle SOF condition */
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}
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