u-boot/drivers/serial/usbtty.c
Vipin KUMAR f9da0f8943 Enable high speed support for USB device framework and usbtty
This patch adds the support for high speed in usb device framework and usbtty
driver. This feature has been kept within a macro CONFIG_USBD_HS, so the board
configuration files have to define this macro to enable high speed support.

Along with that specific peripheral drivers also need to define a function to
let the framework know that the enumeration has happened at high speed.
This function prototype is "int is_usbd_high_speed(void)"

Signed-off-by: Vipin Kumar <vipin.kumar@st.com>
Signed-off-by: Amit Virdi <amit.virdi@st.com>
2012-03-28 16:31:08 +02:00

1060 lines
28 KiB
C

/*
* (C) Copyright 2003
* Gerry Hamel, geh@ti.com, Texas Instruments
*
* (C) Copyright 2006
* Bryan O'Donoghue, bodonoghue@codehermit.ie
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <common.h>
#include <config.h>
#include <circbuf.h>
#include <stdio_dev.h>
#include <asm/unaligned.h>
#include "usbtty.h"
#include "usb_cdc_acm.h"
#include "usbdescriptors.h"
#ifdef DEBUG
#define TTYDBG(fmt,args...)\
serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
#else
#define TTYDBG(fmt,args...) do{}while(0)
#endif
#if 1
#define TTYERR(fmt,args...)\
serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,\
__LINE__,##args)
#else
#define TTYERR(fmt,args...) do{}while(0)
#endif
/*
* Defines
*/
#define NUM_CONFIGS 1
#define MAX_INTERFACES 2
#define NUM_ENDPOINTS 3
#define ACM_TX_ENDPOINT 3
#define ACM_RX_ENDPOINT 2
#define GSERIAL_TX_ENDPOINT 2
#define GSERIAL_RX_ENDPOINT 1
#define NUM_ACM_INTERFACES 2
#define NUM_GSERIAL_INTERFACES 1
#define CONFIG_USBD_DATA_INTERFACE_STR "Bulk Data Interface"
#define CONFIG_USBD_CTRL_INTERFACE_STR "Control Interface"
/*
* 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 struct stdio_dev 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[MAX_INTERFACES];
static struct usb_alternate_instance alternate_instance[MAX_INTERFACES];
/* one extra for control endpoint */
static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1];
/*
* Global flag
*/
int usbtty_configured_flag = 0;
/*
* Serial number
*/
static char serial_number[16];
/*
* Descriptors, Strings, Local variables.
*/
/* defined and used by gadget/ep0.c */
extern struct usb_string_descriptor **usb_strings;
/* Indicies, References */
static unsigned short rx_endpoint = 0;
static unsigned short tx_endpoint = 0;
static unsigned short interface_count = 0;
static struct usb_string_descriptor *usbtty_string_table[STR_COUNT];
/* USB Descriptor Strings */
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 wstrDataInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)];
static u8 wstrCtrlInterface[2 + 2*(sizeof(CONFIG_USBD_DATA_INTERFACE_STR)-1)];
/* Standard USB Data Structures */
static struct usb_interface_descriptor interface_descriptors[MAX_INTERFACES];
static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS];
static struct usb_configuration_descriptor *configuration_descriptor = 0;
static struct usb_device_descriptor device_descriptor = {
.bLength = sizeof(struct usb_device_descriptor),
.bDescriptorType = USB_DT_DEVICE,
.bcdUSB = cpu_to_le16(USB_BCD_VERSION),
.bDeviceSubClass = 0x00,
.bDeviceProtocol = 0x00,
.bMaxPacketSize0 = EP0_MAX_PACKET_SIZE,
.idVendor = cpu_to_le16(CONFIG_USBD_VENDORID),
.bcdDevice = cpu_to_le16(USBTTY_BCD_DEVICE),
.iManufacturer = STR_MANUFACTURER,
.iProduct = STR_PRODUCT,
.iSerialNumber = STR_SERIAL,
.bNumConfigurations = NUM_CONFIGS
};
#if defined(CONFIG_USBD_HS)
static struct usb_qualifier_descriptor qualifier_descriptor = {
.bLength = sizeof(struct usb_qualifier_descriptor),
.bDescriptorType = USB_DT_QUAL,
.bcdUSB = cpu_to_le16(USB_BCD_VERSION),
.bDeviceClass = COMMUNICATIONS_DEVICE_CLASS,
.bDeviceSubClass = 0x00,
.bDeviceProtocol = 0x00,
.bMaxPacketSize0 = EP0_MAX_PACKET_SIZE,
.bNumConfigurations = NUM_CONFIGS
};
#endif
/*
* Static CDC ACM specific descriptors
*/
struct acm_config_desc {
struct usb_configuration_descriptor configuration_desc;
/* Master Interface */
struct usb_interface_descriptor interface_desc;
struct usb_class_header_function_descriptor usb_class_header;
struct usb_class_call_management_descriptor usb_class_call_mgt;
struct usb_class_abstract_control_descriptor usb_class_acm;
struct usb_class_union_function_descriptor usb_class_union;
struct usb_endpoint_descriptor notification_endpoint;
/* Slave Interface */
struct usb_interface_descriptor data_class_interface;
struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS-1];
} __attribute__((packed));
static struct acm_config_desc acm_configuration_descriptors[NUM_CONFIGS] = {
{
.configuration_desc ={
.bLength =
sizeof(struct usb_configuration_descriptor),
.bDescriptorType = USB_DT_CONFIG,
.wTotalLength =
cpu_to_le16(sizeof(struct acm_config_desc)),
.bNumInterfaces = NUM_ACM_INTERFACES,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG,
.bmAttributes =
BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
.bMaxPower = USBTTY_MAXPOWER
},
/* Interface 1 */
.interface_desc = {
.bLength = sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = 0x01,
.bInterfaceClass =
COMMUNICATIONS_INTERFACE_CLASS_CONTROL,
.bInterfaceSubClass = COMMUNICATIONS_ACM_SUBCLASS,
.bInterfaceProtocol = COMMUNICATIONS_V25TER_PROTOCOL,
.iInterface = STR_CTRL_INTERFACE,
},
.usb_class_header = {
.bFunctionLength =
sizeof(struct usb_class_header_function_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_ST_HEADER,
.bcdCDC = cpu_to_le16(110),
},
.usb_class_call_mgt = {
.bFunctionLength =
sizeof(struct usb_class_call_management_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_ST_CMF,
.bmCapabilities = 0x00,
.bDataInterface = 0x01,
},
.usb_class_acm = {
.bFunctionLength =
sizeof(struct usb_class_abstract_control_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_ST_ACMF,
.bmCapabilities = 0x00,
},
.usb_class_union = {
.bFunctionLength =
sizeof(struct usb_class_union_function_descriptor),
.bDescriptorType = CS_INTERFACE,
.bDescriptorSubtype = USB_ST_UF,
.bMasterInterface = 0x00,
.bSlaveInterface0 = 0x01,
},
.notification_endpoint = {
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize
= cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE),
.bInterval = 0xFF,
},
/* Interface 2 */
.data_class_interface = {
.bLength =
sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0x01,
.bAlternateSetting = 0x00,
.bNumEndpoints = 0x02,
.bInterfaceClass =
COMMUNICATIONS_INTERFACE_CLASS_DATA,
.bInterfaceSubClass = DATA_INTERFACE_SUBCLASS_NONE,
.bInterfaceProtocol = DATA_INTERFACE_PROTOCOL_NONE,
.iInterface = STR_DATA_INTERFACE,
},
.data_endpoints = {
{
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT,
.bmAttributes =
USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize =
cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE),
.bInterval = 0xFF,
},
{
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN,
.bmAttributes =
USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize =
cpu_to_le16(CONFIG_USBD_SERIAL_BULK_PKTSIZE),
.bInterval = 0xFF,
},
},
},
};
static struct rs232_emu rs232_desc={
.dter = 115200,
.stop_bits = 0x00,
.parity = 0x00,
.data_bits = 0x08
};
/*
* Static Generic Serial specific data
*/
struct gserial_config_desc {
struct usb_configuration_descriptor configuration_desc;
struct usb_interface_descriptor interface_desc[NUM_GSERIAL_INTERFACES];
struct usb_endpoint_descriptor data_endpoints[NUM_ENDPOINTS];
} __attribute__((packed));
static struct gserial_config_desc
gserial_configuration_descriptors[NUM_CONFIGS] ={
{
.configuration_desc ={
.bLength = sizeof(struct usb_configuration_descriptor),
.bDescriptorType = USB_DT_CONFIG,
.wTotalLength =
cpu_to_le16(sizeof(struct gserial_config_desc)),
.bNumInterfaces = NUM_GSERIAL_INTERFACES,
.bConfigurationValue = 1,
.iConfiguration = STR_CONFIG,
.bmAttributes =
BMATTRIBUTE_SELF_POWERED|BMATTRIBUTE_RESERVED,
.bMaxPower = USBTTY_MAXPOWER
},
.interface_desc = {
{
.bLength =
sizeof(struct usb_interface_descriptor),
.bDescriptorType = USB_DT_INTERFACE,
.bInterfaceNumber = 0,
.bAlternateSetting = 0,
.bNumEndpoints = NUM_ENDPOINTS,
.bInterfaceClass =
COMMUNICATIONS_INTERFACE_CLASS_VENDOR,
.bInterfaceSubClass =
COMMUNICATIONS_NO_SUBCLASS,
.bInterfaceProtocol =
COMMUNICATIONS_NO_PROTOCOL,
.iInterface = STR_DATA_INTERFACE
},
},
.data_endpoints = {
{
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_OUT_ENDPOINT | USB_DIR_OUT,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize =
cpu_to_le16(CONFIG_USBD_SERIAL_OUT_PKTSIZE),
.bInterval= 0xFF,
},
{
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_IN_ENDPOINT | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.wMaxPacketSize =
cpu_to_le16(CONFIG_USBD_SERIAL_IN_PKTSIZE),
.bInterval = 0xFF,
},
{
.bLength =
sizeof(struct usb_endpoint_descriptor),
.bDescriptorType = USB_DT_ENDPOINT,
.bEndpointAddress = UDC_INT_ENDPOINT | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.wMaxPacketSize =
cpu_to_le16(CONFIG_USBD_SERIAL_INT_PKTSIZE),
.bInterval = 0xFF,
},
},
},
};
/*
* Static Function Prototypes
*/
static void usbtty_init_strings (void);
static void usbtty_init_instances (void);
static void usbtty_init_endpoints (void);
static void usbtty_init_terminal_type(short type);
static void usbtty_event_handler (struct usb_device_instance *device,
usb_device_event_t event, int data);
static int usbtty_cdc_setup(struct usb_device_request *request,
struct urb *urb);
static int usbtty_configured (void);
static int write_buffer (circbuf_t * buf);
static int fill_buffer (circbuf_t * buf);
void usbtty_poll (void);
/* 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++){
#if defined(__LITTLE_ENDIAN)
wide[i] = (u16) str[i];
#elif defined(__BIG_ENDIAN)
wide[i] = ((u16)(str[i])<<8);
#else
#error "__LITTLE_ENDIAN or __BIG_ENDIAN undefined"
#endif
}
}
/*
* Test whether a character is in the RX buffer
*/
int usbtty_tstc (void)
{
struct usb_endpoint_instance *endpoint =
&endpoint_instance[rx_endpoint];
/* If no input data exists, allow more RX to be accepted */
if(usbtty_input.size <= 0){
udc_unset_nak(endpoint->endpoint_address&0x03);
}
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;
struct usb_endpoint_instance *endpoint =
&endpoint_instance[rx_endpoint];
while (usbtty_input.size <= 0) {
udc_unset_nak(endpoint->endpoint_address&0x03);
usbtty_poll ();
}
buf_pop (&usbtty_input, &c, 1);
udc_set_nak(endpoint->endpoint_address&0x03);
return c;
}
/*
* Output a single byte to the usb client port.
*/
void usbtty_putc (const char c)
{
if (!usbtty_configured ())
return;
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 ();
}
}
/* usbtty_puts() helper function for finding the next '\n' in a string */
static int next_nl_pos (const char *s)
{
int i;
for (i = 0; s[i] != '\0'; i++) {
if (s[i] == '\n')
return i;
}
return i;
}
/*
* Output a string to the usb client port - implementing flow control
*/
static void __usbtty_puts (const char *str, int len)
{
int maxlen = usbtty_output.totalsize;
int space, n;
/* break str into chunks < buffer size, if needed */
while (len > 0) {
usbtty_poll ();
space = maxlen - usbtty_output.size;
/* Empty buffer here, if needed, to ensure space... */
if (space) {
write_buffer (&usbtty_output);
n = MIN (space, MIN (len, maxlen));
buf_push (&usbtty_output, str, n);
str += n;
len -= n;
}
}
}
void usbtty_puts (const char *str)
{
int n;
int len;
if (!usbtty_configured ())
return;
len = strlen (str);
/* add '\r' for each '\n' */
while (len > 0) {
n = next_nl_pos (str);
if (str[n] == '\n') {
__usbtty_puts (str, n + 1);
__usbtty_puts ("\r", 1);
str += (n + 1);
len -= (n + 1);
} else {
/* No \n found. All done. */
__usbtty_puts (str, n);
break;
}
}
/* Poll at end to handle new data... */
usbtty_poll ();
}
/*
* Initialize the usb client port.
*
*/
int drv_usbtty_init (void)
{
int rc;
char * sn;
char * tt;
int snlen;
/* Ger seiral number */
if (!(sn = getenv("serial#"))) {
sn = "000000000000";
}
snlen = strlen(sn);
if (snlen > sizeof(serial_number) - 1) {
printf ("Warning: serial number %s is too long (%d > %lu)\n",
sn, snlen, (ulong)(sizeof(serial_number) - 1));
snlen = sizeof(serial_number) - 1;
}
memcpy (serial_number, sn, snlen);
serial_number[snlen] = '\0';
/* Decide on which type of UDC device to be.
*/
if(!(tt = getenv("usbtty"))) {
tt = "generic";
}
usbtty_init_terminal_type(strcmp(tt,"cdc_acm"));
/* prepare buffers... */
buf_init (&usbtty_input, USBTTY_BUFFER_SIZE);
buf_init (&usbtty_output, USBTTY_BUFFER_SIZE);
/* Now, set up USB controller and infrastructure */
udc_init (); /* Basic USB initialization */
usbtty_init_strings ();
usbtty_init_instances ();
usbtty_init_endpoints ();
udc_startup_events (device_instance);/* Enable dev, init udc pointers */
udc_connect (); /* Enable pullup for host detection */
/* Device initialization */
memset (&usbttydev, 0, sizeof (usbttydev));
strcpy (usbttydev.name, "usbtty");
usbttydev.ext = 0; /* No extensions */
usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
usbttydev.tstc = usbtty_tstc; /* 'tstc' function */
usbttydev.getc = usbtty_getc; /* 'getc' function */
usbttydev.putc = usbtty_putc; /* 'putc' function */
usbttydev.puts = usbtty_puts; /* 'puts' function */
rc = stdio_register (&usbttydev);
return (rc == 0) ? 1 : rc;
}
static void usbtty_init_strings (void)
{
struct usb_string_descriptor *string;
usbtty_string_table[STR_LANG] =
(struct usb_string_descriptor*)wstrLang;
string = (struct usb_string_descriptor *) wstrManufacturer;
string->bLength = sizeof(wstrManufacturer);
string->bDescriptorType = USB_DT_STRING;
str2wide (CONFIG_USBD_MANUFACTURER, string->wData);
usbtty_string_table[STR_MANUFACTURER]=string;
string = (struct usb_string_descriptor *) wstrProduct;
string->bLength = sizeof(wstrProduct);
string->bDescriptorType = USB_DT_STRING;
str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData);
usbtty_string_table[STR_PRODUCT]=string;
string = (struct usb_string_descriptor *) wstrSerial;
string->bLength = sizeof(serial_number);
string->bDescriptorType = USB_DT_STRING;
str2wide (serial_number, string->wData);
usbtty_string_table[STR_SERIAL]=string;
string = (struct usb_string_descriptor *) wstrConfiguration;
string->bLength = sizeof(wstrConfiguration);
string->bDescriptorType = USB_DT_STRING;
str2wide (CONFIG_USBD_CONFIGURATION_STR, string->wData);
usbtty_string_table[STR_CONFIG]=string;
string = (struct usb_string_descriptor *) wstrDataInterface;
string->bLength = sizeof(wstrDataInterface);
string->bDescriptorType = USB_DT_STRING;
str2wide (CONFIG_USBD_DATA_INTERFACE_STR, string->wData);
usbtty_string_table[STR_DATA_INTERFACE]=string;
string = (struct usb_string_descriptor *) wstrCtrlInterface;
string->bLength = sizeof(wstrCtrlInterface);
string->bDescriptorType = USB_DT_STRING;
str2wide (CONFIG_USBD_CTRL_INTERFACE_STR, string->wData);
usbtty_string_table[STR_CTRL_INTERFACE]=string;
/* Now, initialize the string table for ep0 handling */
usb_strings = usbtty_string_table;
}
#define init_wMaxPacketSize(x) le16_to_cpu(get_unaligned(\
&ep_descriptor_ptrs[(x) - 1]->wMaxPacketSize));
static void usbtty_init_instances (void)
{
int i;
/* initialize device instance */
memset (device_instance, 0, sizeof (struct usb_device_instance));
device_instance->device_state = STATE_INIT;
device_instance->device_descriptor = &device_descriptor;
#if defined(CONFIG_USBD_HS)
device_instance->qualifier_descriptor = &qualifier_descriptor;
#endif
device_instance->event = usbtty_event_handler;
device_instance->cdc_recv_setup = usbtty_cdc_setup;
device_instance->bus = bus_instance;
device_instance->configurations = NUM_CONFIGS;
device_instance->configuration_instance_array = config_instance;
/* initialize bus instance */
memset (bus_instance, 0, sizeof (struct usb_bus_instance));
bus_instance->device = device_instance;
bus_instance->endpoint_array = endpoint_instance;
bus_instance->max_endpoints = 1;
bus_instance->maxpacketsize = 64;
bus_instance->serial_number_str = serial_number;
/* configuration instance */
memset (config_instance, 0,
sizeof (struct usb_configuration_instance));
config_instance->interfaces = interface_count;
config_instance->configuration_descriptor = configuration_descriptor;
config_instance->interface_instance_array = interface_instance;
/* interface instance */
memset (interface_instance, 0,
sizeof (struct usb_interface_instance));
interface_instance->alternates = 1;
interface_instance->alternates_instance_array = alternate_instance;
/* alternates instance */
memset (alternate_instance, 0,
sizeof (struct usb_alternate_instance));
alternate_instance->interface_descriptor = interface_descriptors;
alternate_instance->endpoints = NUM_ENDPOINTS;
alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs;
/* endpoint instances */
memset (&endpoint_instance[0], 0,
sizeof (struct usb_endpoint_instance));
endpoint_instance[0].endpoint_address = 0;
endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE;
endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL;
endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE;
endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL;
udc_setup_ep (device_instance, 0, &endpoint_instance[0]);
for (i = 1; i <= NUM_ENDPOINTS; i++) {
memset (&endpoint_instance[i], 0,
sizeof (struct usb_endpoint_instance));
endpoint_instance[i].endpoint_address =
ep_descriptor_ptrs[i - 1]->bEndpointAddress;
endpoint_instance[i].rcv_attributes =
ep_descriptor_ptrs[i - 1]->bmAttributes;
endpoint_instance[i].rcv_packetSize = init_wMaxPacketSize(i);
endpoint_instance[i].tx_attributes =
ep_descriptor_ptrs[i - 1]->bmAttributes;
endpoint_instance[i].tx_packetSize = init_wMaxPacketSize(i);
endpoint_instance[i].tx_attributes =
ep_descriptor_ptrs[i - 1]->bmAttributes;
urb_link_init (&endpoint_instance[i].rcv);
urb_link_init (&endpoint_instance[i].rdy);
urb_link_init (&endpoint_instance[i].tx);
urb_link_init (&endpoint_instance[i].done);
if (endpoint_instance[i].endpoint_address & USB_DIR_IN)
endpoint_instance[i].tx_urb =
usbd_alloc_urb (device_instance,
&endpoint_instance[i]);
else
endpoint_instance[i].rcv_urb =
usbd_alloc_urb (device_instance,
&endpoint_instance[i]);
}
}
static void usbtty_init_endpoints (void)
{
int i;
bus_instance->max_endpoints = NUM_ENDPOINTS + 1;
for (i = 1; i <= NUM_ENDPOINTS; i++) {
udc_setup_ep (device_instance, i, &endpoint_instance[i]);
}
}
/* usbtty_init_terminal_type
*
* Do some late binding for our device type.
*/
static void usbtty_init_terminal_type(short type)
{
switch(type){
/* CDC ACM */
case 0:
/* Assign endpoint descriptors */
ep_descriptor_ptrs[0] =
&acm_configuration_descriptors[0].notification_endpoint;
ep_descriptor_ptrs[1] =
&acm_configuration_descriptors[0].data_endpoints[0];
ep_descriptor_ptrs[2] =
&acm_configuration_descriptors[0].data_endpoints[1];
/* Enumerate Device Descriptor */
device_descriptor.bDeviceClass =
COMMUNICATIONS_DEVICE_CLASS;
device_descriptor.idProduct =
cpu_to_le16(CONFIG_USBD_PRODUCTID_CDCACM);
#if defined(CONFIG_USBD_HS)
qualifier_descriptor.bDeviceClass =
COMMUNICATIONS_DEVICE_CLASS;
#endif
/* Assign endpoint indices */
tx_endpoint = ACM_TX_ENDPOINT;
rx_endpoint = ACM_RX_ENDPOINT;
/* Configuration Descriptor */
configuration_descriptor =
(struct usb_configuration_descriptor*)
&acm_configuration_descriptors;
/* Interface count */
interface_count = NUM_ACM_INTERFACES;
break;
/* BULK IN/OUT & Default */
case 1:
default:
/* Assign endpoint descriptors */
ep_descriptor_ptrs[0] =
&gserial_configuration_descriptors[0].data_endpoints[0];
ep_descriptor_ptrs[1] =
&gserial_configuration_descriptors[0].data_endpoints[1];
ep_descriptor_ptrs[2] =
&gserial_configuration_descriptors[0].data_endpoints[2];
/* Enumerate Device Descriptor */
device_descriptor.bDeviceClass = 0xFF;
device_descriptor.idProduct =
cpu_to_le16(CONFIG_USBD_PRODUCTID_GSERIAL);
#if defined(CONFIG_USBD_HS)
qualifier_descriptor.bDeviceClass = 0xFF;
#endif
/* Assign endpoint indices */
tx_endpoint = GSERIAL_TX_ENDPOINT;
rx_endpoint = GSERIAL_RX_ENDPOINT;
/* Configuration Descriptor */
configuration_descriptor =
(struct usb_configuration_descriptor*)
&gserial_configuration_descriptors;
/* Interface count */
interface_count = NUM_GSERIAL_INTERFACES;
break;
}
}
/******************************************************************************/
static struct urb *next_urb (struct usb_device_instance *device,
struct usb_endpoint_instance *endpoint)
{
struct urb *current_urb = NULL;
int space;
/* If there's a queue, then we should add to the last urb */
if (!endpoint->tx_queue) {
current_urb = endpoint->tx_urb;
} else {
/* Last urb from tx chain */
current_urb =
p2surround (struct urb, link, endpoint->tx.prev);
}
/* Make sure this one has enough room */
space = current_urb->buffer_length - current_urb->actual_length;
if (space > 0) {
return current_urb;
} else { /* No space here */
/* First look at done list */
current_urb = first_urb_detached (&endpoint->done);
if (!current_urb) {
current_urb = usbd_alloc_urb (device, endpoint);
}
urb_append (&endpoint->tx, current_urb);
endpoint->tx_queue++;
}
return current_urb;
}
static int write_buffer (circbuf_t * buf)
{
if (!usbtty_configured ()) {
return 0;
}
struct usb_endpoint_instance *endpoint =
&endpoint_instance[tx_endpoint];
struct urb *current_urb = NULL;
current_urb = next_urb (device_instance, endpoint);
/* TX data still exists - send it now
*/
if(endpoint->sent < current_urb->actual_length){
if(udc_endpoint_write (endpoint)){
/* Write pre-empted by RX */
return -1;
}
}
if (buf->size) {
char *dest;
int space_avail;
int popnum, popped;
int total = 0;
/* Break buffer into urb sized pieces,
* and link each to the endpoint
*/
while (buf->size > 0) {
if (!current_urb) {
TTYERR ("current_urb is NULL, buf->size %d\n",
buf->size);
return total;
}
dest = (char*)current_urb->buffer +
current_urb->actual_length;
space_avail =
current_urb->buffer_length -
current_urb->actual_length;
popnum = MIN (space_avail, buf->size);
if (popnum == 0)
break;
popped = buf_pop (buf, dest, popnum);
if (popped == 0)
break;
current_urb->actual_length += popped;
total += popped;
/* If endpoint->last == 0, then transfers have
* not started on this endpoint
*/
if (endpoint->last == 0) {
if(udc_endpoint_write (endpoint)){
/* Write pre-empted by RX */
return -1;
}
}
}/* end while */
return total;
}
return 0;
}
static int fill_buffer (circbuf_t * buf)
{
struct usb_endpoint_instance *endpoint =
&endpoint_instance[rx_endpoint];
if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) {
unsigned int nb = 0;
char *src = (char *) endpoint->rcv_urb->buffer;
unsigned int rx_avail = buf->totalsize - buf->size;
if(rx_avail >= endpoint->rcv_urb->actual_length){
nb = endpoint->rcv_urb->actual_length;
buf_push (buf, src, nb);
endpoint->rcv_urb->actual_length = 0;
}
return nb;
}
return 0;
}
static int usbtty_configured (void)
{
return usbtty_configured_flag;
}
/******************************************************************************/
static void usbtty_event_handler (struct usb_device_instance *device,
usb_device_event_t event, int data)
{
#if defined(CONFIG_USBD_HS)
int i;
#endif
switch (event) {
case DEVICE_RESET:
case DEVICE_BUS_INACTIVE:
usbtty_configured_flag = 0;
break;
case DEVICE_CONFIGURED:
usbtty_configured_flag = 1;
break;
case DEVICE_ADDRESS_ASSIGNED:
#if defined(CONFIG_USBD_HS)
/*
* is_usbd_high_speed routine needs to be defined by
* specific gadget driver
* It returns TRUE if device enumerates at High speed
* Retuns FALSE otherwise
*/
for (i = 0; i < NUM_ENDPOINTS; i++) {
if (((ep_descriptor_ptrs[i]->bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) ==
USB_ENDPOINT_XFER_BULK)
&& is_usbd_high_speed()) {
ep_descriptor_ptrs[i]->wMaxPacketSize =
CONFIG_USBD_SERIAL_BULK_HS_PKTSIZE;
}
endpoint_instance[i + 1].tx_packetSize =
ep_descriptor_ptrs[i]->wMaxPacketSize;
endpoint_instance[i + 1].rcv_packetSize =
ep_descriptor_ptrs[i]->wMaxPacketSize;
}
#endif
usbtty_init_endpoints ();
default:
break;
}
}
/******************************************************************************/
int usbtty_cdc_setup(struct usb_device_request *request, struct urb *urb)
{
switch (request->bRequest){
case ACM_SET_CONTROL_LINE_STATE: /* Implies DTE ready */
break;
case ACM_SEND_ENCAPSULATED_COMMAND : /* Required */
break;
case ACM_SET_LINE_ENCODING : /* DTE stop/parity bits
* per character */
break;
case ACM_GET_ENCAPSULATED_RESPONSE : /* request response */
break;
case ACM_GET_LINE_ENCODING : /* request DTE rate,
* stop/parity bits */
memcpy (urb->buffer , &rs232_desc, sizeof(rs232_desc));
urb->actual_length = sizeof(rs232_desc);
break;
default:
return 1;
}
return 0;
}
/******************************************************************************/
/*
* Since interrupt handling has not yet been implemented, we use this function
* to handle polling. This is called by the tstc,getc,putc,puts routines to
* update the USB state.
*/
void usbtty_poll (void)
{
/* New interrupts? */
udc_irq();
/* Write any output data to host buffer
* (do this before checking interrupts to avoid missing one)
*/
if (usbtty_configured ()) {
write_buffer (&usbtty_output);
}
/* New interrupts? */
udc_irq();
/* Check for new data from host..
* (do this after checking interrupts to get latest data)
*/
if (usbtty_configured ()) {
fill_buffer (&usbtty_input);
}
/* New interrupts? */
udc_irq();
}