mirror of
https://github.com/brain-hackers/u-boot-brain
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666 lines
18 KiB
C
666 lines
18 KiB
C
/*
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* (C) Copyright 2003
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* Gerry Hamel, geh@ti.com, Texas Instruments
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#ifdef CONFIG_USB_TTY
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#include <circbuf.h>
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#include <devices.h>
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#include "usbtty.h"
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#if 0
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#define TTYDBG(fmt,args...) serial_printf("[%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
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#else
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#define TTYDBG(fmt,args...) do{}while(0)
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#endif
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#if 0
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#define TTYERR(fmt,args...) serial_printf("ERROR![%s] %s %d: "fmt, __FILE__,__FUNCTION__,__LINE__,##args)
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#else
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#define TTYERR(fmt,args...) do{}while(0)
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#endif
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/*
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* Buffers to hold input and output data
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*/
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#define USBTTY_BUFFER_SIZE 256
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static circbuf_t usbtty_input;
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static circbuf_t usbtty_output;
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/*
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* Instance variables
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*/
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static device_t usbttydev;
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static struct usb_device_instance device_instance[1];
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static struct usb_bus_instance bus_instance[1];
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static struct usb_configuration_instance config_instance[NUM_CONFIGS];
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static struct usb_interface_instance interface_instance[NUM_INTERFACES];
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static struct usb_alternate_instance alternate_instance[NUM_INTERFACES];
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static struct usb_endpoint_instance endpoint_instance[NUM_ENDPOINTS+1]; /* one extra for control endpoint */
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/*
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* Static allocation of urbs
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*/
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#define RECV_ENDPOINT 1
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#define TX_ENDPOINT 2
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/*
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* Global flag
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*/
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int usbtty_configured_flag = 0;
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/*
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* Serial number
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*/
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static char serial_number[16];
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/*
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* Descriptors
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*/
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static u8 wstrLang[4] = {4,USB_DT_STRING,0x9,0x4};
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static u8 wstrManufacturer[2 + 2*(sizeof(CONFIG_USBD_MANUFACTURER)-1)];
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static u8 wstrProduct[2 + 2*(sizeof(CONFIG_USBD_PRODUCT_NAME)-1)];
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static u8 wstrSerial[2 + 2*(sizeof(serial_number) - 1)];
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static u8 wstrConfiguration[2 + 2*(sizeof(CONFIG_USBD_CONFIGURATION_STR)-1)];
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static u8 wstrInterface[2 + 2*(sizeof(CONFIG_USBD_INTERFACE_STR)-1)];
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static struct usb_string_descriptor *usbtty_string_table[] = {
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(struct usb_string_descriptor*)wstrLang,
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(struct usb_string_descriptor*)wstrManufacturer,
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(struct usb_string_descriptor*)wstrProduct,
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(struct usb_string_descriptor*)wstrSerial,
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(struct usb_string_descriptor*)wstrConfiguration,
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(struct usb_string_descriptor*)wstrInterface
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};
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extern struct usb_string_descriptor **usb_strings; /* defined and used by omap1510_ep0.c */
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static struct usb_device_descriptor device_descriptor = {
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bLength: sizeof(struct usb_device_descriptor),
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bDescriptorType: USB_DT_DEVICE,
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bcdUSB: USB_BCD_VERSION,
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bDeviceClass: USBTTY_DEVICE_CLASS,
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bDeviceSubClass: USBTTY_DEVICE_SUBCLASS,
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bDeviceProtocol: USBTTY_DEVICE_PROTOCOL,
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bMaxPacketSize0: EP0_MAX_PACKET_SIZE,
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idVendor: CONFIG_USBD_VENDORID,
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idProduct: CONFIG_USBD_PRODUCTID,
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bcdDevice: USBTTY_BCD_DEVICE,
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iManufacturer: STR_MANUFACTURER,
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iProduct: STR_PRODUCT,
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iSerialNumber: STR_SERIAL,
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bNumConfigurations: NUM_CONFIGS
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};
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static struct usb_configuration_descriptor config_descriptors[NUM_CONFIGS] = {
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{
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bLength: sizeof(struct usb_configuration_descriptor),
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bDescriptorType: USB_DT_CONFIG,
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wTotalLength: (sizeof(struct usb_configuration_descriptor)*NUM_CONFIGS) +
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(sizeof(struct usb_interface_descriptor)*NUM_INTERFACES) +
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(sizeof(struct usb_endpoint_descriptor)*NUM_ENDPOINTS),
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bNumInterfaces: NUM_INTERFACES,
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bConfigurationValue: 1,
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iConfiguration: STR_CONFIG,
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bmAttributes: BMATTRIBUTE_SELF_POWERED | BMATTRIBUTE_RESERVED,
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bMaxPower: USBTTY_MAXPOWER
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},
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};
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static struct usb_interface_descriptor interface_descriptors[NUM_INTERFACES] = {
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{
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bLength: sizeof(struct usb_interface_descriptor),
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bDescriptorType: USB_DT_INTERFACE,
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bInterfaceNumber: 0,
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bAlternateSetting: 0,
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bNumEndpoints: NUM_ENDPOINTS,
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bInterfaceClass: USBTTY_INTERFACE_CLASS,
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bInterfaceSubClass: USBTTY_INTERFACE_SUBCLASS,
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bInterfaceProtocol: USBTTY_INTERFACE_PROTOCOL,
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iInterface: STR_INTERFACE
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},
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};
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static struct usb_endpoint_descriptor ep_descriptors[NUM_ENDPOINTS] = {
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{
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bLength: sizeof(struct usb_endpoint_descriptor),
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bDescriptorType: USB_DT_ENDPOINT,
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bEndpointAddress: CONFIG_USBD_SERIAL_OUT_ENDPOINT | USB_DIR_OUT,
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bmAttributes: USB_ENDPOINT_XFER_BULK,
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wMaxPacketSize: CONFIG_USBD_SERIAL_OUT_PKTSIZE,
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bInterval: 0
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},
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{
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bLength: sizeof(struct usb_endpoint_descriptor),
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bDescriptorType: USB_DT_ENDPOINT,
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bEndpointAddress: CONFIG_USBD_SERIAL_IN_ENDPOINT | USB_DIR_IN,
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bmAttributes: USB_ENDPOINT_XFER_BULK,
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wMaxPacketSize: CONFIG_USBD_SERIAL_IN_PKTSIZE,
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bInterval: 0
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},
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{
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bLength: sizeof(struct usb_endpoint_descriptor),
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bDescriptorType: USB_DT_ENDPOINT,
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bEndpointAddress: CONFIG_USBD_SERIAL_INT_ENDPOINT | USB_DIR_IN,
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bmAttributes: USB_ENDPOINT_XFER_INT,
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wMaxPacketSize: CONFIG_USBD_SERIAL_INT_PKTSIZE,
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bInterval: 0
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},
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};
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static struct usb_endpoint_descriptor *ep_descriptor_ptrs[NUM_ENDPOINTS] = {
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&(ep_descriptors[0]),
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&(ep_descriptors[1]),
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&(ep_descriptors[2]),
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};
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/* utility function for converting char* to wide string used by USB */
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static void str2wide (char *str, u16 * wide)
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{
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int i;
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for (i = 0; i < strlen (str) && str[i]; i++)
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wide[i] = (u16) str[i];
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}
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/*
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* Prototypes
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*/
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static void usbtty_init_strings (void);
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static void usbtty_init_instances (void);
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static void usbtty_init_endpoints (void);
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static void usbtty_event_handler (struct usb_device_instance *device,
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usb_device_event_t event, int data);
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static int usbtty_configured (void);
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static int write_buffer (circbuf_t * buf);
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static int fill_buffer (circbuf_t * buf);
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void usbtty_poll (void);
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static void pretend_interrupts (void);
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/*
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* Test whether a character is in the RX buffer
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*/
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int usbtty_tstc (void)
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{
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usbtty_poll ();
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return (usbtty_input.size > 0);
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}
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/*
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* Read a single byte from the usb client port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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int usbtty_getc (void)
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{
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char c;
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while (usbtty_input.size <= 0) {
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usbtty_poll ();
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}
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buf_pop (&usbtty_input, &c, 1);
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return c;
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}
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/*
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* Output a single byte to the usb client port.
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*/
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void usbtty_putc (const char c)
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{
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buf_push (&usbtty_output, &c, 1);
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/* If \n, also do \r */
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if (c == '\n')
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buf_push (&usbtty_output, "\r", 1);
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/* Poll at end to handle new data... */
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if ((usbtty_output.size + 2) >= usbtty_output.totalsize) {
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usbtty_poll ();
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}
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}
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/* usbtty_puts() helper function for finding the next '\n' in a string */
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static int next_nl_pos (const char *s)
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{
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int i;
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for (i = 0; s[i] != '\0'; i++) {
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if (s[i] == '\n')
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return i;
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}
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return i;
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}
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/*
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* Output a string to the usb client port.
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*/
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static void __usbtty_puts (const char *str, int len)
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{
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int maxlen = usbtty_output.totalsize;
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int space, n;
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/* break str into chunks < buffer size, if needed */
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while (len > 0) {
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space = maxlen - usbtty_output.size;
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/* Empty buffer here, if needed, to ensure space... */
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if (space <= 0) {
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write_buffer (&usbtty_output);
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space = maxlen - usbtty_output.size;
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if (space <= 0) {
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space = len; /* allow old data to be overwritten. */
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}
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}
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n = MIN (space, MIN (len, maxlen));
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buf_push (&usbtty_output, str, n);
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str += n;
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len -= n;
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}
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}
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void usbtty_puts (const char *str)
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{
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int n;
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int len = strlen (str);
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/* add '\r' for each '\n' */
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while (len > 0) {
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n = next_nl_pos (str);
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if (str[n] == '\n') {
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__usbtty_puts (str, n + 1);
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__usbtty_puts ("\r", 1);
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str += (n + 1);
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len -= (n + 1);
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} else {
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/* No \n found. All done. */
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__usbtty_puts (str, n);
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break;
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}
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}
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/* Poll at end to handle new data... */
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usbtty_poll ();
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}
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/*
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* Initialize the usb client port.
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*
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*/
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int drv_usbtty_init (void)
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{
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int rc;
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char * sn;
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int snlen;
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if (!(sn = getenv("serial#"))) {
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sn = "000000000000";
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}
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snlen = strlen(sn);
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if (snlen > sizeof(serial_number) - 1) {
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printf ("Warning: serial number %s is too long (%d > %d)\n",
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sn, snlen, sizeof(serial_number) - 1);
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snlen = sizeof(serial_number) - 1;
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}
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memcpy (serial_number, sn, snlen);
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serial_number[snlen] = '\0';
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/* prepare buffers... */
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buf_init (&usbtty_input, USBTTY_BUFFER_SIZE);
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buf_init (&usbtty_output, USBTTY_BUFFER_SIZE);
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/* Now, set up USB controller and infrastructure */
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udc_init (); /* Basic USB initialization */
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usbtty_init_strings ();
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usbtty_init_instances ();
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udc_startup_events (device_instance); /* Enable our device, initialize udc pointers */
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udc_connect (); /* Enable pullup for host detection */
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usbtty_init_endpoints ();
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/* Device initialization */
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memset (&usbttydev, 0, sizeof (usbttydev));
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strcpy (usbttydev.name, "usbtty");
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usbttydev.ext = 0; /* No extensions */
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usbttydev.flags = DEV_FLAGS_INPUT | DEV_FLAGS_OUTPUT;
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usbttydev.tstc = usbtty_tstc; /* 'tstc' function */
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usbttydev.getc = usbtty_getc; /* 'getc' function */
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usbttydev.putc = usbtty_putc; /* 'putc' function */
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usbttydev.puts = usbtty_puts; /* 'puts' function */
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rc = device_register (&usbttydev);
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return (rc == 0) ? 1 : rc;
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}
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static void usbtty_init_strings (void)
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{
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struct usb_string_descriptor *string;
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string = (struct usb_string_descriptor *) wstrManufacturer;
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string->bLength = sizeof (wstrManufacturer);
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string->bDescriptorType = USB_DT_STRING;
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str2wide (CONFIG_USBD_MANUFACTURER, string->wData);
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string = (struct usb_string_descriptor *) wstrProduct;
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string->bLength = sizeof (wstrProduct);
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string->bDescriptorType = USB_DT_STRING;
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str2wide (CONFIG_USBD_PRODUCT_NAME, string->wData);
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string = (struct usb_string_descriptor *) wstrSerial;
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string->bLength = 2 + 2*strlen(serial_number);
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string->bDescriptorType = USB_DT_STRING;
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str2wide (serial_number, string->wData);
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string = (struct usb_string_descriptor *) wstrConfiguration;
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string->bLength = sizeof (wstrConfiguration);
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string->bDescriptorType = USB_DT_STRING;
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str2wide (CONFIG_USBD_CONFIGURATION_STR, string->wData);
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string = (struct usb_string_descriptor *) wstrInterface;
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string->bLength = sizeof (wstrInterface);
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string->bDescriptorType = USB_DT_STRING;
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str2wide (CONFIG_USBD_INTERFACE_STR, string->wData);
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/* Now, initialize the string table for ep0 handling */
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usb_strings = usbtty_string_table;
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}
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static void usbtty_init_instances (void)
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{
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int i;
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/* initialize device instance */
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memset (device_instance, 0, sizeof (struct usb_device_instance));
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device_instance->device_state = STATE_INIT;
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device_instance->device_descriptor = &device_descriptor;
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device_instance->event = usbtty_event_handler;
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device_instance->bus = bus_instance;
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device_instance->configurations = NUM_CONFIGS;
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device_instance->configuration_instance_array = config_instance;
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/* initialize bus instance */
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memset (bus_instance, 0, sizeof (struct usb_bus_instance));
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bus_instance->device = device_instance;
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bus_instance->endpoint_array = endpoint_instance;
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bus_instance->max_endpoints = 1;
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bus_instance->maxpacketsize = 64;
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bus_instance->serial_number_str = serial_number;
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/* configuration instance */
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memset (config_instance, 0,
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sizeof (struct usb_configuration_instance));
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config_instance->interfaces = NUM_INTERFACES;
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config_instance->configuration_descriptor = config_descriptors;
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config_instance->interface_instance_array = interface_instance;
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/* interface instance */
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memset (interface_instance, 0,
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sizeof (struct usb_interface_instance));
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interface_instance->alternates = 1;
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interface_instance->alternates_instance_array = alternate_instance;
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/* alternates instance */
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memset (alternate_instance, 0,
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sizeof (struct usb_alternate_instance));
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alternate_instance->interface_descriptor = interface_descriptors;
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alternate_instance->endpoints = NUM_ENDPOINTS;
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alternate_instance->endpoints_descriptor_array = ep_descriptor_ptrs;
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/* endpoint instances */
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memset (&endpoint_instance[0], 0,
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sizeof (struct usb_endpoint_instance));
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endpoint_instance[0].endpoint_address = 0;
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endpoint_instance[0].rcv_packetSize = EP0_MAX_PACKET_SIZE;
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endpoint_instance[0].rcv_attributes = USB_ENDPOINT_XFER_CONTROL;
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endpoint_instance[0].tx_packetSize = EP0_MAX_PACKET_SIZE;
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endpoint_instance[0].tx_attributes = USB_ENDPOINT_XFER_CONTROL;
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udc_setup_ep (device_instance, 0, &endpoint_instance[0]);
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for (i = 1; i <= NUM_ENDPOINTS; i++) {
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memset (&endpoint_instance[i], 0,
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sizeof (struct usb_endpoint_instance));
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endpoint_instance[i].endpoint_address =
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ep_descriptors[i - 1].bEndpointAddress;
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endpoint_instance[i].rcv_packetSize =
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ep_descriptors[i - 1].wMaxPacketSize;
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endpoint_instance[i].rcv_attributes =
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ep_descriptors[i - 1].bmAttributes;
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endpoint_instance[i].tx_packetSize =
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ep_descriptors[i - 1].wMaxPacketSize;
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endpoint_instance[i].tx_attributes =
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ep_descriptors[i - 1].bmAttributes;
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urb_link_init (&endpoint_instance[i].rcv);
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urb_link_init (&endpoint_instance[i].rdy);
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urb_link_init (&endpoint_instance[i].tx);
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urb_link_init (&endpoint_instance[i].done);
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if (endpoint_instance[i].endpoint_address & USB_DIR_IN)
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endpoint_instance[i].tx_urb =
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usbd_alloc_urb (device_instance,
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&endpoint_instance[i]);
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else
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endpoint_instance[i].rcv_urb =
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usbd_alloc_urb (device_instance,
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&endpoint_instance[i]);
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}
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}
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static void usbtty_init_endpoints (void)
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{
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int i;
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bus_instance->max_endpoints = NUM_ENDPOINTS + 1;
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for (i = 0; i <= NUM_ENDPOINTS; i++) {
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udc_setup_ep (device_instance, i, &endpoint_instance[i]);
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}
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}
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/*********************************************************************************/
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static struct urb *next_urb (struct usb_device_instance *device,
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struct usb_endpoint_instance *endpoint)
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{
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struct urb *current_urb = NULL;
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int space;
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/* If there's a queue, then we should add to the last urb */
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if (!endpoint->tx_queue) {
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current_urb = endpoint->tx_urb;
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} else {
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/* Last urb from tx chain */
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current_urb =
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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;
|
|
}
|
|
|
|
if (buf->size) {
|
|
|
|
struct usb_endpoint_instance *endpoint =
|
|
&endpoint_instance[TX_ENDPOINT];
|
|
struct urb *current_urb = NULL;
|
|
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) {
|
|
current_urb = next_urb (device_instance, endpoint);
|
|
if (!current_urb) {
|
|
TTYERR ("current_urb is NULL, buf->size %d\n",
|
|
buf->size);
|
|
return total;
|
|
}
|
|
|
|
dest = 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) {
|
|
udc_endpoint_write (endpoint);
|
|
}
|
|
|
|
} /* end while */
|
|
return total;
|
|
} /* end if tx_urb */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fill_buffer (circbuf_t * buf)
|
|
{
|
|
struct usb_endpoint_instance *endpoint =
|
|
&endpoint_instance[RECV_ENDPOINT];
|
|
|
|
if (endpoint->rcv_urb && endpoint->rcv_urb->actual_length) {
|
|
unsigned int nb = endpoint->rcv_urb->actual_length;
|
|
char *src = (char *) endpoint->rcv_urb->buffer;
|
|
|
|
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)
|
|
{
|
|
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:
|
|
usbtty_init_endpoints ();
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*********************************************************************************/
|
|
|
|
|
|
/*
|
|
* 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? */
|
|
pretend_interrupts ();
|
|
|
|
/* 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? */
|
|
pretend_interrupts ();
|
|
|
|
/* Check for new data from host.. (do this after checking interrupts to get latest data) */
|
|
if (usbtty_configured ()) {
|
|
fill_buffer (&usbtty_input);
|
|
}
|
|
|
|
/* New interrupts? */
|
|
pretend_interrupts ();
|
|
}
|
|
|
|
static void pretend_interrupts (void)
|
|
{
|
|
/* Loop while we have interrupts.
|
|
* If we don't do this, the input chain
|
|
* polling delay is likely to miss
|
|
* host requests.
|
|
*/
|
|
while (inw (UDC_IRQ_SRC) & ~UDC_SOF_Flg) {
|
|
/* Handle any new IRQs */
|
|
omap1510_udc_irq ();
|
|
omap1510_udc_noniso_irq ();
|
|
}
|
|
}
|
|
#endif
|