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#include "usbh_hubbed.h"
#include "driver/usbh_device_driver.h"
#include "usbh_driver_hid_kbd.h"
#include "usart_helpers.h"
#include <libopencm3/usb/usbstd.h>
enum STATES {
STATE_INACTIVE,
STATE_READING_COMPLETE,
STATE_READING_REQUEST,
STATE_SET_CONFIGURATION_REQUEST,
STATE_SET_CONFIGURATION_EMPTY_READ,
STATE_SET_CONFIGURATION_COMPLETE
};
struct _hid_kbd_device {
usbh_device_t *usbh_device;
uint8_t buffer[USBH_HID_MOUSE_BUFFER];
uint16_t endpoint_in_maxpacketsize;
uint8_t endpoint_in_address;
enum STATES state_next;
uint8_t endpoint_in_toggle;
uint8_t device_id;
uint8_t configuration_value;
};
typedef struct _hid_kbd_device hid_kbd_device_t;
static hid_kbd_device_t kbd_device[USBH_HID_MOUSE_MAX_DEVICES];
static const hid_kbd_config_t *kbd_config;
#include <stdint.h>
static bool initialized = false;
void hid_kbd_driver_init(const hid_kbd_config_t *config)
{
uint32_t i;
initialized = true;
kbd_config = config;
for (i = 0; i < USBH_HID_MOUSE_MAX_DEVICES; i++) {
kbd_device[i].state_next = STATE_INACTIVE;
}
}
static void *init(void *usbh_dev)
{
if (!initialized) {
LOG_PRINTF("\n%s/%d : driver not initialized\r\n", __FILE__, __LINE__);
return (0);
}
uint32_t i;
hid_kbd_device_t *drvdata = 0;
// find free data space for mouse device
for (i = 0; i < USBH_HID_MOUSE_MAX_DEVICES; i++) {
if (kbd_device[i].state_next == STATE_INACTIVE) {
drvdata = &kbd_device[i];
drvdata->device_id = i;
drvdata->endpoint_in_address = 0;
drvdata->endpoint_in_toggle = 0;
drvdata->usbh_device = (usbh_device_t *)usbh_dev;
break;
}
}
return (drvdata);
}
static bool analyze_descriptor(void *drvdata, void *descriptor)
{
hid_kbd_device_t *kbd = (hid_kbd_device_t *)drvdata;
uint8_t desc_type = ((uint8_t *)descriptor)[1];
switch (desc_type) {
case USB_DT_CONFIGURATION:
{
struct usb_config_descriptor *cfg = (struct usb_config_descriptor*)descriptor;
kbd->configuration_value = cfg->bConfigurationValue;
}
break;
case USB_DT_DEVICE:
break;
case USB_DT_INTERFACE:
break;
case USB_DT_ENDPOINT:
{
struct usb_endpoint_descriptor *ep = (struct usb_endpoint_descriptor*)descriptor;
if ((ep->bmAttributes&0x03) == USB_ENDPOINT_ATTR_INTERRUPT) {
uint8_t epaddr = ep->bEndpointAddress;
if (epaddr & (1<<7)) {
kbd->endpoint_in_address = epaddr&0x7f;
if (ep->wMaxPacketSize < USBH_HID_MOUSE_BUFFER) {
kbd->endpoint_in_maxpacketsize = ep->wMaxPacketSize;
} else {
kbd->endpoint_in_maxpacketsize = USBH_HID_MOUSE_BUFFER;
}
}
if (kbd->endpoint_in_address) {
kbd->state_next = STATE_SET_CONFIGURATION_REQUEST;
return (true);
}
}
}
break;
// TODO Class Specific descriptors
default:
break;
}
return (false);
}
static void event(usbh_device_t *dev, usbh_packet_callback_data_t cb_data)
{
hid_kbd_device_t *kbd = (hid_kbd_device_t *)dev->drvdata;
switch (kbd->state_next) {
case STATE_READING_COMPLETE:
{
switch (cb_data.status) {
case USBH_PACKET_CALLBACK_STATUS_OK:
case USBH_PACKET_CALLBACK_STATUS_ERRSIZ:
kbd->state_next = STATE_READING_REQUEST;
break;
case USBH_PACKET_CALLBACK_STATUS_EFATAL:
case USBH_PACKET_CALLBACK_STATUS_EAGAIN:
ERROR(cb_data.status);
kbd->state_next = STATE_INACTIVE;
break;
}
}
break;
case STATE_SET_CONFIGURATION_EMPTY_READ:
{
LOG_PRINTF("|empty packet read|");
switch (cb_data.status) {
case USBH_PACKET_CALLBACK_STATUS_OK:
kbd->state_next = STATE_SET_CONFIGURATION_COMPLETE;
device_xfer_control_read(0, 0, event, dev);
break;
case USBH_PACKET_CALLBACK_STATUS_ERRSIZ:
case USBH_PACKET_CALLBACK_STATUS_EFATAL:
case USBH_PACKET_CALLBACK_STATUS_EAGAIN:
ERROR(cb_data.status);
kbd->state_next = STATE_INACTIVE;
break;
}
}
break;
case STATE_SET_CONFIGURATION_COMPLETE: // Configured
{
switch (cb_data.status) {
case USBH_PACKET_CALLBACK_STATUS_OK:
kbd->state_next = STATE_READING_REQUEST;
kbd->endpoint_in_toggle = 0;
LOG_PRINTF("\nKEYBOARD CONFIGURED\n");
break;
case USBH_PACKET_CALLBACK_STATUS_ERRSIZ:
case USBH_PACKET_CALLBACK_STATUS_EFATAL:
case USBH_PACKET_CALLBACK_STATUS_EAGAIN:
ERROR(cb_data.status);
kbd->state_next = STATE_INACTIVE;
break;
}
}
break;
default:
break;
}
}
static void read_kbd_in(void *drvdata)
{
hid_kbd_device_t *kbd = (hid_kbd_device_t *)drvdata;
usbh_packet_t packet;
packet.address = kbd->usbh_device->address;
packet.data = &kbd->buffer[0];
packet.datalen = kbd->endpoint_in_maxpacketsize;
packet.endpoint_address = kbd->endpoint_in_address;
packet.endpoint_size_max = kbd->endpoint_in_maxpacketsize;
packet.endpoint_type = USBH_EPTYP_INTERRUPT;
packet.speed = kbd->usbh_device->speed;
packet.callback = event;
packet.callback_arg = kbd->usbh_device;
packet.toggle = &kbd->endpoint_in_toggle;
kbd->state_next = STATE_READING_COMPLETE;
usbh_read(kbd->usbh_device, &packet);
kbd_config->kbd_in_message_handler(packet.datalen, packet.data);
}
static void poll(void *drvdata, uint32_t time_curr_us)
{
(void)time_curr_us;
hid_kbd_device_t *kbd = (hid_kbd_device_t *)drvdata;
usbh_device_t *dev = kbd->usbh_device;
switch (kbd->state_next) {
case STATE_READING_REQUEST:
{
read_kbd_in(drvdata);
}
break;
case STATE_SET_CONFIGURATION_REQUEST:
{
struct usb_setup_data setup_data;
setup_data.bmRequestType = 0b00000000;
setup_data.bRequest = USB_REQ_SET_CONFIGURATION;
setup_data.wValue = kbd->configuration_value;
setup_data.wIndex = 0;
setup_data.wLength = 0;
kbd->state_next = STATE_SET_CONFIGURATION_EMPTY_READ;
device_xfer_control_write(&setup_data, sizeof(setup_data), event, dev);
}
break;
default:
// do nothing - probably transfer is in progress
break;
}
}
static void remove(void *drvdata)
{
hid_kbd_device_t *kbd = (hid_kbd_device_t *)drvdata;
kbd->state_next = STATE_INACTIVE;
kbd->endpoint_in_address = 0;
}
static const usbh_dev_driver_info_t driver_info = {
.deviceClass = -1,
.deviceSubClass = -1,
.deviceProtocol = -1,
.idVendor = -1,
.idProduct = -1,
.ifaceClass = 0x03,
.ifaceSubClass = 1, //-1
.ifaceProtocol = 0x01 //0x02
};
const usbh_dev_driver_t usbh_hid_kbd_driver = {
.init = init,
.analyze_descriptor = analyze_descriptor,
.poll = poll,
.remove = remove,
.info = &driver_info
};
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