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#include <stdint.h>
#include <memory.h>
#include "CH58x_common.h"
#include "../utils.h"
#include "../debug.h"
#define EP_NUM (1)
#define IF_NUM (0)
static __attribute__((aligned(4))) uint8_t ep_buf[64 + 64];
static uint8_t *const ep_out = ep_buf;
static uint8_t *const ep_in = ep_buf + 64;
static void (*on_write)(uint8_t *buf, uint16_t len);
static USB_ITF_DESCR if_desc = {
.bLength = sizeof(USB_ITF_DESCR),
.bDescriptorType = USB_DESCR_TYP_INTERF,
.bInterfaceNumber = IF_NUM,
.bAlternateSetting = 0,
.bNumEndpoints = 2, /* One for read, one for write */
.bInterfaceClass = 0x03, /* HID class */
.bInterfaceSubClass = 0, /* No subclass */
.bInterfaceProtocol = 0, /* Not a Mouse nor Keyboard */
.iInterface = 0 /* Index of string descriptor */
};
static USB_HID_DESCR hid_desc = {
.bLength = sizeof(USB_HID_DESCR),
.bDescriptorType = USB_DESCR_TYP_HID,
.bcdHID = 0x0100,
.bCountryCode = 0x00,
.bNumDescriptors = 0x01,
.bDescriptorTypeX = 0x22,
.wDescriptorLengthL = 0x22,
.wDescriptorLengthH = 0x00
};
static USB_ENDP_DESCR read_ep_desc = {
.bLength = sizeof(USB_ENDP_DESCR),
.bDescriptorType = USB_DESCR_TYP_ENDP,
.bEndpointAddress = 0x80 | EP_NUM, /* IN endpoint */
.bmAttributes = 0x03, /* exchange data over Interrupt */
.wMaxPacketSize = MAX_PACKET_SIZE, /* bytes */
.bInterval = 0xff /* polling interval */
};
static USB_ENDP_DESCR write_ep_desc = {
.bLength = sizeof(USB_ENDP_DESCR),
.bDescriptorType = USB_DESCR_TYP_ENDP,
.bEndpointAddress = EP_NUM, /* IN endpoint */
.bmAttributes = 0x03, /* exchange data over Interrupt */
.wMaxPacketSize = MAX_PACKET_SIZE, /* bytes */
.bInterval = 8 /* polling interval */
};
static const uint8_t report_desc[] = {
0x06, 0x00, 0xFF, // Usage Page (Vendor Defined 0xFF00)
0x09, 0x01, // Usage (0x01)
0xA1, 0x01, // Collection (Application)
/* IN */
0x09, 0x02, // Usage (0x02)
0x15, 0x00, // Logical Minimum (0)
0x26, 0x00, 0xFF, // Logical Maximum (-256)
0x75, 0x08, // Report Size (8)
0x95, 0x40, // Report Count (64)
0x81, 0x06, // INPUT
/* OUT */
0x09, 0x02, // Usage (0x02)
0x15, 0x00, // Logical Minimum (0)
0x26, 0x00, 0xFF, // Logical Maximum (-256)
0x75, 0x08, // Report Size (8)
0x95, 0x40, // Report Count (64)
0x91, 0x06, // OUTPUT
0xC0, // End Collection
};
static void hid_request_handler(USB_SETUP_REQ * request)
{
_TRACE();
static uint8_t report_val, idle_val;
uint8_t req = request->bRequest;
uint16_t type = request->wValue >> 8;
switch(req) {
case USB_GET_DESCRIPTOR:
PRINT("- USB_GET_DESCRIPTOR\n");
PRINT("bDescriptorType: 0x%02x\n", type);
switch (type)
{
case USB_DESCR_TYP_REPORT:
PRINT("- USB_DESCR_TYP_REPORT\n");
ctrl_start_load_block(report_desc, sizeof(report_desc));
break;
default:
break;
}
break;
case HID_GET_REPORT:
PRINT("- HID_GET_REPORT\n");
break;
case HID_GET_IDLE:
PRINT("- HID_GET_IDLE\n");
ctrl_start_load_block(&idle_val, 1);
break;
case HID_GET_PROTOCOL:
PRINT("- HID_GET_PROTOCOL\n");
ctrl_start_load_block(&report_val, 1);
break;
case HID_SET_REPORT:
PRINT("- HID_SET_REPORT\n");
ctrl_ack();
break;
case HID_SET_IDLE:
PRINT("- HID_SET_IDLE\n");
ctrl_ack();
break;
case HID_SET_PROTOCOL:
PRINT("- HID_SET_PROTOCOL\n");
break;
default:
break;
}
}
static volatile uint16_t transferred;
static void ep_handler()
{
_TRACE();
static int tog;
uint8_t token = R8_USB_INT_ST & MASK_UIS_TOKEN;
switch(token) {
case UIS_TOKEN_OUT:
if (on_write)
on_write(ep_out, R8_USB_RX_LEN);
set_handshake(EP_NUM, USB_ACK, tog, 0);
tog = !tog;
break;
case UIS_TOKEN_IN:
if (transferred == 0) {
transferred = 1;
} else {
set_handshake(EP_NUM, USB_NAK, 1, 0);
}
break;
break;
default:
break;
}
}
// In case we want to send something to the host,
// or want to see the log over hidraw by `cat /dev/hidrawX`
void hiddev_fill_IN(uint8_t *buf, uint8_t len)
{
if (len > read_ep_desc.wMaxPacketSize)
return;
static int tog;
memcpy(ep_in, buf, len);
set_handshake(EP_NUM, USB_ACK, tog, len);
tog = !tog;
transferred = 0;
}
static int wait_until_sent(uint16_t timeout_ms)
{
while(timeout_ms--) {
if (transferred) {
return 0;
}
DelayMs(1);
}
return -1;
}
int hiddev_tx_poll(uint8_t *buf, int len, uint16_t timeout_ms)
{
int i = 0;
while (len > read_ep_desc.wMaxPacketSize) {
hiddev_fill_IN(buf + i, read_ep_desc.wMaxPacketSize);
if (wait_until_sent(timeout_ms))
return -1;
i += read_ep_desc.wMaxPacketSize;
len -= read_ep_desc.wMaxPacketSize;
}
hiddev_fill_IN(buf + i, len);
if (wait_until_sent(timeout_ms))
return -1;
return 0;
}
void hiddev_onWrite(void (*cb)(uint8_t *buf, uint16_t len))
{
on_write = cb;
}
void hiddev_init()
{
cfg_desc_append(&if_desc);
cfg_desc_append(&hid_desc);
cfg_desc_append(&read_ep_desc);
cfg_desc_append(&write_ep_desc);
if_cb_register(IF_NUM, hid_request_handler);
ep_cb_register(EP_NUM, ep_handler);
dma_register(EP_NUM, ep_out);
}
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