nes-proj/cpu/cc253x/usb/common/cdc-acm/cdc-acm.c
2012-11-01 17:42:04 +00:00

158 lines
3.7 KiB
C

#include "cdc-acm.h"
#include "cdc.h"
#include "usb-api.h"
#include "usb-core.h"
#include <stdio.h>
#ifdef DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
static uint8_t usb_ctrl_data_buffer[32];
static struct usb_cdc_line_coding usb_line_coding = { 9600, 0x00, 0x00, 0x08 }; // 9600 baud, 8N1
static uint8_t line_state;
static uint8_t events;
static struct process *cdc_event_process = NULL;
static void
notify_user(uint8_t e)
{
events |= e;
if(cdc_event_process) {
process_poll(cdc_event_process);
}
}
static void
encapsulated_command(uint8_t *data, unsigned int length)
{
PRINTF("Got CDC command: length %d\n", length);
usb_send_ctrl_status();
}
static void
set_line_encoding(uint8_t *data, unsigned int length)
{
if(length == 7) {
#ifdef DEBUG
static const char parity_char[] = { 'N', 'O', 'E', 'M', 'S' };
static const char *stop_bits_str[] = { "1", "1.5", "2" };
const struct usb_cdc_line_coding *coding =
(const struct usb_cdc_line_coding *)usb_ctrl_data_buffer;
char parity = ((coding->bParityType > 4)
? '?' : parity_char[coding->bParityType]);
const char *stop_bits = ((coding->bCharFormat > 2)
? "?" : stop_bits_str[coding->bCharFormat]);
PRINTF("Got CDC line coding: %ld/%d/%c/%s\n",
coding->dwDTERate, coding->bDataBits, parity, stop_bits);
#endif
memcpy(&usb_line_coding, data, sizeof(usb_line_coding));
notify_user(USB_CDC_ACM_LINE_CODING);
usb_send_ctrl_status();
} else {
usb_error_stall();
}
}
static unsigned int
handle_cdc_acm_requests()
{
PRINTF("CDC request %02x %02x\n", usb_setup_buffer.bmRequestType,
usb_setup_buffer.bRequest);
switch (usb_setup_buffer.bmRequestType) {
case 0x21: /* CDC interface OUT requests */
/* Check if it's the right interface */
if(usb_setup_buffer.wIndex != 0)
return 0;
switch (usb_setup_buffer.bRequest) {
case SET_CONTROL_LINE_STATE:
line_state = usb_setup_buffer.wValue;
notify_user(USB_CDC_ACM_LINE_STATE);
usb_send_ctrl_status();
return 1;
case SEND_ENCAPSULATED_COMMAND:
{
unsigned int len = usb_setup_buffer.wLength;
if(len > sizeof(usb_ctrl_data_buffer))
len = sizeof(usb_ctrl_data_buffer);
usb_get_ctrl_data(usb_ctrl_data_buffer, len, encapsulated_command);
}
return 1;
case SET_LINE_CODING:
{
unsigned int len = usb_setup_buffer.wLength;
if(len > sizeof(usb_ctrl_data_buffer))
len = sizeof(usb_ctrl_data_buffer);
usb_get_ctrl_data(usb_ctrl_data_buffer, len, set_line_encoding);
}
return 1;
}
break;
case 0xa1: /* CDC interface IN requests */
if(usb_setup_buffer.wIndex != 0)
return 0;
switch (usb_setup_buffer.bRequest) {
case GET_ENCAPSULATED_RESPONSE:
PRINTF("CDC response");
usb_send_ctrl_status();
return 1;
case GET_LINE_CODING:
usb_send_ctrl_response((uint8_t *) & usb_line_coding, 7);
return 1;
}
}
return 0;
}
static const struct USBRequestHandler cdc_acm_request_handler = {
0x21, 0x7f,
0x00, 0x00,
handle_cdc_acm_requests
};
static struct USBRequestHandlerHook cdc_acm_request_hook = {
NULL,
&cdc_acm_request_handler
};
void
usb_cdc_acm_setup()
{
usb_register_request_handler(&cdc_acm_request_hook);
}
uint8_t
usb_cdc_acm_get_events(void)
{
uint8_t r = events;
events = 0;
return r;
}
uint8_t
usb_cdc_acm_get_line_state(void)
{
return line_state;
}
const struct usb_cdc_line_coding *
usb_cdc_acm_get_line_coding(void)
{
return &usb_line_coding;
}
void
usb_cdc_acm_set_event_process(struct process *p)
{
cdc_event_process = p;
}