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authorGareth McMullin2011-02-10 19:58:51 +1300
committerGareth McMullin2011-02-10 19:58:51 +1300
commite64a9d2bf9751e505d344eb5024da4772c3f4e50 (patch)
treeb0511f18b10607411502f54a358572a006f77cea /lib/usb/usb_f107.c
parentdfa9145a34453750c7f67c187b23911c3c0e44c9 (diff)
Minor cleanup of usb. Template driver for STM32F107 added.
Diffstat (limited to 'lib/usb/usb_f107.c')
-rw-r--r--lib/usb/usb_f107.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/lib/usb/usb_f107.c b/lib/usb/usb_f107.c
new file mode 100644
index 0000000..338735a
--- /dev/null
+++ b/lib/usb/usb_f107.c
@@ -0,0 +1,163 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2011 Gareth McMullin <gareth@blacksphere.co.nz>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/common.h>
+#include <libopencm3/stm32/tools.h>
+#include <libopencm3/stm32/otg_fs.h>
+#include <libopencm3/usb/usbd.h>
+#include "usb_private.h"
+
+static void stm32f107_usbd_init(void);
+static void stm32f107_set_address(u8 addr);
+static void stm32f107_ep_setup(u8 addr, u8 type, u16 max_size,
+ void (*callback) (u8 ep));
+static void stm32f107_endpoints_reset(void);
+static void stm32f107_ep_stall_set(u8 addr, u8 stall);
+static u8 stm32f107_ep_stall_get(u8 addr);
+static u16 stm32f107_ep_write_packet(u8 addr, const void *buf, u16 len);
+static u16 stm32f107_ep_read_packet(u8 addr, void *buf, u16 len);
+static void stm32f107_poll(void);
+
+const struct _usbd_driver stm32f107_usb_driver = {
+ .init = stm32f107_usbd_init,
+ .set_address = stm32f107_set_address,
+ .ep_setup = stm32f107_ep_setup,
+ .ep_reset = stm32f107_endpoints_reset,
+ .ep_stall_set = stm32f107_ep_stall_set,
+ .ep_stall_get = stm32f107_ep_stall_get,
+ .ep_write_packet = stm32f107_ep_write_packet,
+ .ep_read_packet = stm32f107_ep_read_packet,
+ .poll = stm32f107_poll,
+};
+
+/** Initialize the USB device controller hardware of the STM32. */
+static void stm32f107_usbd_init(void)
+{
+ /* TODO: Enable interrupts on Reset, Transfer, Suspend and Resume */
+}
+
+static void stm32f107_set_address(u8 addr)
+{
+ (void)addr;
+ /* TODO: Set device address and enable. */
+}
+
+static void stm32f107_ep_setup(u8 addr, u8 type, u16 max_size,
+ void (*callback) (u8 ep))
+{
+ /* TODO: Configure endpoint address and type.
+ * Allocate FIFO memory for endpoint.
+ * Install callback funciton.
+ */
+ (void)type; (void)max_size;
+
+ u8 dir = addr & 0x80;
+ addr &= 0x7f;
+
+ if (dir || (addr == 0)) {
+ if (callback) {
+ _usbd_device.
+ user_callback_ctr[addr][USB_TRANSACTION_IN] =
+ (void *)callback;
+ }
+ }
+
+ if (!dir) {
+ if (callback) {
+ _usbd_device.
+ user_callback_ctr[addr][USB_TRANSACTION_OUT] =
+ (void *)callback;
+ }
+ }
+}
+
+static void stm32f107_endpoints_reset(void)
+{
+ /* TODO: Reset all endpoints. */
+}
+
+static void stm32f107_ep_stall_set(u8 addr, u8 stall)
+{
+ /* TODO: set or clear stall condition */
+ (void)addr; (void)stall;
+}
+
+static u8 stm32f107_ep_stall_get(u8 addr)
+{
+ /* TODO: return 1 if STALL set. */
+ (void)addr;
+
+ return 0;
+}
+
+static u16 stm32f107_ep_write_packet(u8 addr, const void *buf, u16 len)
+{
+ addr &= 0x7F;
+
+ /* TODO: Send packet on endpoint */
+ (void)buf;
+
+ return len;
+}
+
+static u16 stm32f107_ep_read_packet(u8 addr, void *buf, u16 len)
+{
+ /* TODO: Read packet from endpoint */
+ (void)addr; (void)buf; (void)len;
+
+ return len;
+}
+
+static void stm32f107_poll(void)
+{
+ /* TODO: Read interrupt status register */
+
+ /* TODO: Handle USB RESET condition */
+ if (0) {
+ _usbd_reset();
+ return;
+ }
+
+ /* TODO: Handle transfer complete condition */
+ if (0) {
+ u8 ep;
+ u8 type;
+
+ if (_usbd_device.user_callback_ctr[ep][type])
+ _usbd_device.user_callback_ctr[ep][type] (ep);
+ /* TODO: clear any interrupt flag */
+ }
+
+ /* TODO: Handle suspend condition */
+ if (0) {
+ /* TODO: Clear suspend interrupt flag */
+ if (_usbd_device.user_callback_suspend)
+ _usbd_device.user_callback_suspend();
+ }
+
+ /* TODO: Handle wakeup condition */
+ if (0) {
+ /* TODO: Clear wakeup interrupt flag */
+ if (_usbd_device.user_callback_resume)
+ _usbd_device.user_callback_resume();
+ }
+
+ /* TODO: Handle SOF condition */
+}
+