425 lines
10 KiB
C
425 lines
10 KiB
C
#include <AT91SAM7S64.h>
|
|
#include <interrupt-utils.h>
|
|
#include <usb-interrupt.h>
|
|
#include <usb-proto.h>
|
|
#include <usb-api.h>
|
|
#include <stdio.h>
|
|
#include <sys/process.h>
|
|
#include <stdio.h>
|
|
#include <descriptors.h>
|
|
#include <string-descriptors.h>
|
|
|
|
#define USB_PULLUP_PIN AT91C_PIO_PA16
|
|
|
|
static unsigned short usb_device_status;
|
|
static unsigned char usb_configuration_value;
|
|
|
|
static struct process * user_process = NULL;
|
|
|
|
static struct USBRequestHandlerHook *usb_request_handler_hooks = NULL;
|
|
|
|
static const unsigned char zero_byte = 0;
|
|
static const unsigned short zero_word = 0;
|
|
|
|
static void
|
|
notify_user(struct usb_user_msg* msg)
|
|
{
|
|
if (user_process) {
|
|
process_post(user_process, PROCESS_EVENT_MSG, msg);
|
|
}
|
|
}
|
|
|
|
void
|
|
usb_set_user_process(struct process *p)
|
|
{
|
|
user_process = p;
|
|
}
|
|
|
|
static void
|
|
get_device_descriptor()
|
|
{
|
|
usb_send_ctrl_response((unsigned char*)&device_descriptor, sizeof(device_descriptor));
|
|
}
|
|
|
|
static void
|
|
get_string_descriptor()
|
|
{
|
|
if (LOW_BYTE(usb_setup_buffer.wValue) == 0) {
|
|
usb_send_ctrl_response((const unsigned char*)string_languages->lang_descr,
|
|
string_languages->lang_descr->bLength);
|
|
} else {
|
|
unsigned char l;
|
|
const struct usb_st_string_descriptor *descriptor;
|
|
const struct usb_st_string_descriptor * const *table;
|
|
const struct usb_st_string_language_map *map;
|
|
if (LOW_BYTE(usb_setup_buffer.wValue) > string_languages->max_index) {
|
|
usb_error_stall();
|
|
return;
|
|
}
|
|
l = string_languages->num_lang;
|
|
map = string_languages->map;
|
|
table = map->descriptors; /* Use first table if language not found */
|
|
while (l > 0) {
|
|
if (map->lang_id == usb_setup_buffer.wIndex) {
|
|
table = map->descriptors;
|
|
break;
|
|
}
|
|
map++;
|
|
l--;
|
|
}
|
|
printf("Lang id %04x = table %p\n", usb_setup_buffer.wIndex, (void*)table);
|
|
descriptor = table[LOW_BYTE(usb_setup_buffer.wValue) - 1];
|
|
usb_send_ctrl_response((const unsigned char*)descriptor,
|
|
descriptor->bLength);
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_configuration_descriptor()
|
|
{
|
|
usb_send_ctrl_response((unsigned char*)configuration_head,
|
|
configuration_head->wTotalLength);
|
|
}
|
|
|
|
static void
|
|
get_configuration()
|
|
{
|
|
usb_send_ctrl_response((unsigned char*)&usb_configuration_value,
|
|
sizeof(usb_configuration_value));
|
|
}
|
|
|
|
/* Returns true if the configuration value changed */
|
|
static int
|
|
set_configuration()
|
|
{
|
|
if (usb_configuration_value != LOW_BYTE(usb_setup_buffer.wValue)) {
|
|
usb_configuration_value = LOW_BYTE(usb_setup_buffer.wValue);
|
|
if (usb_configuration_value > 0) {
|
|
*AT91C_UDP_GLBSTATE |= AT91C_UDP_CONFG;
|
|
} else {
|
|
*AT91C_UDP_GLBSTATE &= ~AT91C_UDP_CONFG;
|
|
}
|
|
usb_send_ctrl_status();
|
|
return 1;
|
|
} else {
|
|
usb_send_ctrl_status();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_device_status()
|
|
{
|
|
puts("get_device_status");
|
|
usb_send_ctrl_response((const unsigned char*)&usb_device_status,
|
|
sizeof(usb_device_status));
|
|
}
|
|
|
|
static void
|
|
get_endpoint_status()
|
|
{
|
|
puts("get_endpoint_status");
|
|
if ((usb_setup_buffer.wIndex & 0x7f) == 0) {
|
|
usb_send_ctrl_response((const unsigned char*)&zero_word,
|
|
sizeof(zero_word));
|
|
} else {
|
|
volatile USBEndpoint *ec;
|
|
ec = usb_find_endpoint(usb_setup_buffer.wIndex);
|
|
if (ec) {
|
|
usb_send_ctrl_response((const unsigned char*)&ec->status, sizeof(ec->status));
|
|
} else {
|
|
usb_error_stall();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_interface_status()
|
|
{
|
|
puts("get_interface_status");
|
|
usb_send_ctrl_response((const unsigned char*)&zero_word,
|
|
sizeof(zero_word));
|
|
}
|
|
|
|
static void
|
|
get_interface()
|
|
{
|
|
puts("get_interface");
|
|
if (usb_configuration_value == 0) usb_error_stall();
|
|
else {
|
|
usb_send_ctrl_response(&zero_byte,
|
|
sizeof(zero_byte));
|
|
}
|
|
}
|
|
|
|
static struct usb_user_msg config_msg = {USB_USER_MSG_TYPE_CONFIG};
|
|
static struct usb_user_msg io_msg[3];
|
|
|
|
static unsigned int
|
|
handle_standard_requests()
|
|
{
|
|
switch(usb_setup_buffer.bmRequestType) {
|
|
case 0x80: /* standard device IN requests */
|
|
switch(usb_setup_buffer.bRequest) {
|
|
case GET_DESCRIPTOR:
|
|
switch (HIGH_BYTE(usb_setup_buffer.wValue)) {
|
|
case DEVICE:
|
|
get_device_descriptor();
|
|
break;
|
|
case CONFIGURATION:
|
|
get_configuration_descriptor();
|
|
break;
|
|
case STRING:
|
|
get_string_descriptor();
|
|
break;
|
|
default:
|
|
/* Unknown descriptor */
|
|
return 0;
|
|
}
|
|
break;
|
|
case GET_CONFIGURATION:
|
|
get_configuration();
|
|
break;
|
|
case GET_STATUS:
|
|
get_device_status();
|
|
break;
|
|
case GET_INTERFACE:
|
|
get_interface();
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case 0x81: /* standard interface IN requests */
|
|
switch(usb_setup_buffer.bRequest) {
|
|
case GET_STATUS:
|
|
get_interface_status();
|
|
break;
|
|
#ifdef HID_ENABLED
|
|
case GET_DESCRIPTOR:
|
|
switch (USB_setup_buffer.wValue.byte.high) {
|
|
case REPORT:
|
|
get_report_descriptor();
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case 0x82: /* standard endpoint IN requests */
|
|
switch(usb_setup_buffer.bRequest) {
|
|
case GET_STATUS:
|
|
get_endpoint_status();
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case 0x00: /* standard device OUT requests */
|
|
switch(usb_setup_buffer.bRequest) {
|
|
case SET_ADDRESS:
|
|
printf("Address: %d\n", LOW_BYTE(usb_setup_buffer.wValue));
|
|
usb_set_address();
|
|
usb_send_ctrl_status();
|
|
break;
|
|
#if SETABLE_STRING_DESCRIPTORS > 0
|
|
case SET_DESCRIPTOR:
|
|
if (usb_setup_buffer.wValue.byte.high == STRING) {
|
|
set_string_descriptor();
|
|
} else {
|
|
return 0;
|
|
}
|
|
break;
|
|
#endif
|
|
case SET_CONFIGURATION:
|
|
if (set_configuration()) {
|
|
config_msg.data.config = LOW_BYTE(usb_setup_buffer.wValue);
|
|
notify_user(&config_msg);
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case 0x02:
|
|
switch(usb_setup_buffer.bRequest) {
|
|
case SET_FEATURE:
|
|
case CLEAR_FEATURE:
|
|
if (usb_setup_buffer.wValue == ENDPOINT_HALT_FEATURE) {
|
|
volatile USBEndpoint *ep = usb_find_endpoint(usb_setup_buffer.wIndex);
|
|
if (ep) {
|
|
usb_halt_endpoint(ep->addr, usb_setup_buffer.bRequest== SET_FEATURE);
|
|
usb_send_ctrl_status();
|
|
} else {
|
|
usb_error_stall();
|
|
}
|
|
} else {
|
|
usb_error_stall();
|
|
}
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
#ifdef HID_ENABLED
|
|
case 0xa1: /* class specific interface IN request*/
|
|
switch(USB_setup_buffer.bRequest) {
|
|
case GET_HID_REPORT:
|
|
puts("Get report\n");
|
|
send_ctrl_response((code u_int8_t*)&zero_byte,
|
|
sizeof(zero_byte));
|
|
break;
|
|
case GET_HID_IDLE:
|
|
puts("Get idle\n");
|
|
send_ctrl_response((code u_int8_t*)&zero_byte,
|
|
sizeof(zero_byte));
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
case 0x21: /* class specific interface OUT request*/
|
|
switch(USB_setup_buffer.bRequest) {
|
|
case SET_HID_IDLE:
|
|
puts("Set idle\n");
|
|
send_ctrl_status();
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static const struct USBRequestHandler standard_request_handler =
|
|
{
|
|
0x00, 0x60,
|
|
0x00, 0x00,
|
|
handle_standard_requests
|
|
};
|
|
|
|
static struct USBRequestHandlerHook standard_request_hook =
|
|
{
|
|
NULL,
|
|
&standard_request_handler
|
|
};
|
|
|
|
PROCESS(usb_process, "USB process");
|
|
|
|
PROCESS_THREAD(usb_process, ev , data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
puts("USB process started");
|
|
while(1) {
|
|
PROCESS_WAIT_EVENT();
|
|
if (ev == PROCESS_EVENT_EXIT) break;
|
|
if (ev == PROCESS_EVENT_POLL) {
|
|
if (usb_events & USB_EVENT_RESET) {
|
|
printf("Reset\n");
|
|
usb_clear_events(USB_EVENT_RESET);
|
|
}
|
|
if (usb_events & USB_EVENT_EP(0)) {
|
|
/* puts("Endpoint 0"); */
|
|
if (usb_endpoint_events[0] & USB_EP_EVENT_SETUP) {
|
|
struct USBRequestHandlerHook *hook = usb_request_handler_hooks;
|
|
#if 0
|
|
puts("Setup");
|
|
{
|
|
unsigned int i;
|
|
for (i = 0; i< 8; i++) printf(" %02x", ((unsigned char*)&usb_setup_buffer)[i]);
|
|
putchar('\n');
|
|
}
|
|
#endif
|
|
while(hook) {
|
|
const struct USBRequestHandler *handler = hook->handler;
|
|
/* Check if the handler matches the request */
|
|
if (((handler->request_type ^ usb_setup_buffer.bmRequestType)
|
|
& handler->request_type_mask) == 0
|
|
&& ((handler->request ^ usb_setup_buffer.bRequest)
|
|
& handler->request_mask) == 0) {
|
|
if (handler->handler_func()) break;
|
|
}
|
|
hook = hook->next;
|
|
}
|
|
if (!hook) {
|
|
/* No handler found */
|
|
usb_error_stall();
|
|
}
|
|
usb_clear_ep_events(0, USB_EP_EVENT_SETUP);
|
|
}
|
|
usb_clear_events(USB_EVENT_EP(0));
|
|
}
|
|
|
|
{
|
|
unsigned int e;
|
|
for (e = 1; e <= 3; e++) {
|
|
if (usb_events & USB_EVENT_EP(e)) {
|
|
if (usb_endpoint_events[e] & (USB_EP_EVENT_OUT|USB_EP_EVENT_IN)) {
|
|
volatile USBEndpoint *ep = usb_find_endpoint(e);
|
|
struct usb_user_msg *msg = &io_msg[e-1];
|
|
if (usb_endpoint_events[e] & USB_EP_EVENT_OUT) {
|
|
msg->type = USB_USER_MSG_TYPE_EP_OUT(e);
|
|
msg->data.length = ep->buf_len;
|
|
} else {
|
|
msg->type = USB_USER_MSG_TYPE_EP_IN(e);
|
|
msg->data.length = ep->buf_size_mask + 1 - ep->buf_len;
|
|
}
|
|
notify_user(msg);
|
|
usb_clear_ep_events(e, USB_EP_EVENT_OUT|USB_EP_EVENT_IN);
|
|
usb_clear_events(USB_EVENT_EP(ep->addr));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
PROCESS_END();
|
|
}
|
|
|
|
|
|
void
|
|
usb_setup(void)
|
|
{
|
|
/* Assume 96MHz PLL frequency */
|
|
*AT91C_CKGR_PLLR = ((*AT91C_CKGR_PLLR & ~AT91C_CKGR_USBDIV)
|
|
| AT91C_CKGR_USBDIV_1);
|
|
/* Enable 48MHz USB clock */
|
|
*AT91C_PMC_SCER = AT91C_PMC_UDP;
|
|
/* Enable USB main clock */
|
|
*AT91C_PMC_PCER = (1 << AT91C_ID_UDP);
|
|
|
|
/* Enable pullup */
|
|
*AT91C_PIOA_PER = USB_PULLUP_PIN;
|
|
*AT91C_PIOA_OER = USB_PULLUP_PIN;
|
|
*AT91C_PIOA_CODR = USB_PULLUP_PIN;
|
|
|
|
usb_register_request_handler(&standard_request_hook);
|
|
process_start(&usb_process, NULL);
|
|
usb_handler_process = &usb_process;
|
|
|
|
/* Enable usb_interrupt */
|
|
AT91C_AIC_SMR[AT91C_ID_UDP] = AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL | 4;
|
|
AT91C_AIC_SVR[AT91C_ID_UDP] = (unsigned long) usb_int;
|
|
*AT91C_AIC_IECR = (1 << AT91C_ID_UDP);
|
|
usb_init_endpoints();
|
|
}
|
|
|
|
void
|
|
usb_register_request_handler(struct USBRequestHandlerHook *hook)
|
|
{
|
|
struct USBRequestHandlerHook **prevp = &usb_request_handler_hooks;
|
|
/* Find last hook */
|
|
while(*prevp) {
|
|
prevp = &(*prevp)->next;
|
|
}
|
|
/* Add last */
|
|
*prevp = hook;
|
|
hook->next = NULL;
|
|
}
|