usbtty.lst

OMAP1510的USB驱动程序

              #include <devices.h>
              #include "usbtty.h"
              
              #if 0
              #define TTYDBG(fmt,args...) serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
              #else
              #define TTYDBG(fmt,args...) do{}while(0)
              #endif
              
              #if 0
              #define TTYERR(fmt,args...) serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
              #else
              #define TTYERR(fmt,args...) do{}while(0)
              #endif
              
              /*
               * Buffers to hold input and output data
               */
              #define USBTTY_BUFFER_SIZE 256
              static circbuf_t usbtty_input;
              static circbuf_t usbtty_output;
              
              
              /*
               * Instance variables
               */
              static device_t usbttydev;
              static struct usb_device_instance        device_instance[1];
              static struct usb_bus_instance           bus_instance[1];
              static struct usb_configuration_instance config_instance[NUM_CONFIGS];
              static struct usb_interface_instance     interface_instance[NUM_INTERFACES];
              static struct usb_alternate_instance     alternate_instance[NUM_INTERFACES];
              static struct usb_endpoint_instance      endpoint_instance[NUM_ENDPOINTS+1]; /* one extra for control endpoint
             - */
C51 COMPILER V8.09   USBTTY                                                                05/05/2008 19:48:27 PAGE 5   

              
              /*
               * Static allocation of urbs
               */
              #define RECV_ENDPOINT 1
              #define TX_ENDPOINT 2
              
              /*
               * Global flag
               */
              int usbtty_configured_flag = 0;
              
              
              /*
               * Serial number
               */
              static char serial_number[16];
              
              /*
               * Descriptors
               */
              static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4};
              static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)];
              static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)];
              static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)];
              static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)];
              static u8 wstrInterface[2 + 2*(sizeof(CONFIG_USBD_INTERFACE_STR)-1)];
              
              static struct usb_string_descriptor *usbtty_string_table[] = {
                (struct usb_string_descriptor*)wstrLang,
                (struct usb_string_descriptor*)wstrManufacturer,
                (struct usb_string_descriptor*)wstrProduct,
                (struct usb_string_descriptor*)wstrSerial,
                (struct usb_string_descriptor*)wstrConfiguration,
                (struct usb_string_descriptor*)wstrInterface
              };
              extern struct usb_string_descriptor **usb_strings; /* defined and used by omap1510_ep0.c */
              
              static struct usb_device_descriptor device_descriptor = {
                bLength:            sizeof(struct usb_device_descriptor),
                bDescriptorType:    USB_DT_DEVICE,
                bcdUSB:             USB_BCD_VERSION,
                bDeviceClass:       USBTTY_DEVICE_CLASS,
                bDeviceSubClass:    USBTTY_DEVICE_SUBCLASS,
                bDeviceProtocol:    USBTTY_DEVICE_PROTOCOL,
                bMaxPacketSize0:    EP0_MAX_PACKET_SIZE,
                idVendor:           CONFIG_USBD_VENDORID,
                idProduct:          CONFIG_USBD_PRODUCTID,
                bcdDevice:          USBTTY_BCD_DEVICE,
                iManufacturer:      STR_MANUFACTURER,
                iProduct:           STR_PRODUCT,
                iSerialNumber:      STR_SERIAL,
                bNumConfigurations: NUM_CONFIGS
                };
              static struct usb_configuration_descriptor config_descriptors[NUM_CONFIGS] = {
                {
                  bLength:             sizeof(struct usb_configuration_descriptor),
                  bDescriptorType:     USB_DT_CONFIG,
                  wTotalLength:        (sizeof(struct usb_configuration_descriptor)*NUM_CONFIGS) +
                                       (sizeof(struct usb_interface_descriptor)*NUM_INTERFACES) +
                                       (sizeof(struct usb_endpoint_descriptor)*NUM_ENDPOINTS),
                  bNumInterfaces:      NUM_INTERFACES,
C51 COMPILER V8.09   USBTTY                                                                05/05/2008 19:48:27 PAGE 6   

                  bConfigurationValue: 1,
                  iConfiguration:      STR_CONFIG,
                  bmAttributes:        BMATTRIBUTE_SELF_POWERED | BMATTRIBUTE_RESERVED,
                  bMaxPower:           USBTTY_MAXPOWER
                },
              };
              static struct usb_interface_descriptor interface_descriptors[NUM_INTERFACES] = {
                {
                  bLength:             sizeof(struct usb_interface_descriptor),
                  bDescriptorType:     USB_DT_INTERFACE,
                  bInterfaceNumber:    0,
                  bAlternateSetting:   0,
                  bNumEndpoints:       NUM_ENDPOINTS,
                  bInterfaceClass:     USBTTY_INTERFACE_CLASS,
                  bInterfaceSubClass:  USBTTY_INTERFACE_SUBCLASS,
                  bInterfaceProtocol:  USBTTY_INTERFACE_PROTOCOL,
                  iInterface:          STR_INTERFACE
                },
              };
              static struct usb_endpoint_descriptor ep_descriptors[NUM_ENDPOINTS] = {
                {
                  bLength:             sizeof(struct usb_endpoint_descriptor),
                  bDescriptorType:     USB_DT_ENDPOINT,
                  bEndpointAddress:    CONFIG_USBD_SERIAL_OUT_ENDPOINT | USB_DIR_OUT,
                  bmAttributes:        USB_ENDPOINT_XFER_BULK,
                  wMaxPacketSize:      CONFIG_USBD_SERIAL_OUT_PKTSIZE,
                  bInterval:           0
                },
                {
                  bLength:             sizeof(struct usb_endpoint_descriptor),
                  bDescriptorType:     USB_DT_ENDPOINT,
                  bEndpointAddress:    CONFIG_USBD_SERIAL_IN_ENDPOINT | USB_DIR_IN,
                  bmAttributes:        USB_ENDPOINT_XFER_BULK,
                  wMaxPacketSize:      CONFIG_USBD_SERIAL_IN_PKTSIZE,
                  bInterval:           0
                },
                {
                  bLength:             sizeof(struct usb_endpoint_descriptor),
                  bDescriptorType:     USB_DT_ENDPOINT,
                  bEndpointAddress:    CONFIG_USBD_SERIAL_INT_ENDPOINT | USB_DIR_IN,
                  bmAttributes:        USB_ENDPOINT_XFER_INT,
                  wMaxPacketSize:      CONFIG_USBD_SERIAL_INT_PKTSIZE,
                  bInterval:           0
                },
              };
              static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS] = {
                &(ep_descriptors[0]),
                &(ep_descriptors[1]),
                &(ep_descriptors[2]),
              };
              
              /* utility function for converting char* to wide string used by USB */
              static void str2wide (char *str, u16 * wide)
              {
                      int i;
              
                      for (i = 0; i < strlen (str) && str[i]; i++)
                              wide[i] = (u16) str[i];
              }
              
              /*
               * Prototypes
C51 COMPILER V8.09   USBTTY                                                                05/05/2008 19:48:27 PAGE 7   

               */
              static void usbtty_init_strings (void);
              static void usbtty_init_instances (void);
              static void usbtty_init_endpoints (void);
              
              static void usbtty_event_handler (struct usb_device_instance *device,
                                                usb_device_event_t event, int data);
              static int usbtty_configured (void);
              
              static int write_buffer (circbuf_t * buf);
              static int fill_buffer (circbuf_t * buf);
              
              void usbtty_poll (void);
              static void pretend_interrupts (void);
              
              
              /*
               * Test whether a character is in the RX buffer
               */
              int usbtty_tstc (void)
              {
                      usbtty_poll ();
                      return (usbtty_input.size > 0);
              }
              
              /*
               * Read a single byte from the usb client port. Returns 1 on success, 0
               * otherwise. When the function is succesfull, the character read is
               * written into its argument c.
               */
              int usbtty_getc (void)
              {
                      char c;
              
                      while (usbtty_input.size <= 0) {
                              usbtty_poll ();
                      }
              
                      buf_pop (&usbtty_input, &c, 1);
                      return c;
              }
              
              /*
               * Output a single byte to the usb client port.
               */
              void usbtty_putc (const char c)
              {
                      buf_push (&usbtty_output, &c, 1);
                      /* If \n, also do \r */
                      if (c == '\n')
                              buf_push (&usbtty_output, "\r", 1);
              
                      /* Poll at end to handle new data... */
                      if ((usbtty_output.size + 2) >= usbtty_output.totalsize) {
                              usbtty_poll ();
                      }
              }