drivers/usb/serial/digi_acceleport.c

Source file repositories/reference/linux-study-clean/drivers/usb/serial/digi_acceleport.c

File Facts

System
Linux kernel
Corpus path
drivers/usb/serial/digi_acceleport.c
Extension
.c
Size
43771 bytes
Lines
1553
Domain
Driver Families
Bucket
drivers/usb
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct digi_serial {
	spinlock_t ds_serial_lock;
	struct usb_serial_port *ds_oob_port;	/* out-of-band port */
	int ds_oob_port_num;			/* index of out-of-band port */
	int ds_device_started;
};

struct digi_port {
	spinlock_t dp_port_lock;
	int dp_port_num;
	int dp_out_buf_len;
	unsigned char dp_out_buf[DIGI_OUT_BUF_SIZE];
	int dp_write_urb_in_use;
	unsigned int dp_modem_signals;
	int dp_transmit_idle;
	wait_queue_head_t dp_transmit_idle_wait;
	int dp_throttled;
	int dp_throttle_restart;
	wait_queue_head_t dp_flush_wait;
	wait_queue_head_t dp_close_wait;	/* wait queue for close */
	wait_queue_head_t write_wait;
	struct usb_serial_port *dp_port;
};


/* Local Function Declarations */

static int digi_write_oob_command(struct usb_serial_port *port,
	unsigned char *buf, int count, int interruptible);
static int digi_write_inb_command(struct usb_serial_port *port,
	unsigned char *buf, int count, unsigned long timeout);
static int digi_set_modem_signals(struct usb_serial_port *port,
	unsigned int modem_signals, int interruptible);
static int digi_transmit_idle(struct usb_serial_port *port,
	unsigned long timeout);
static void digi_rx_throttle(struct tty_struct *tty);
static void digi_rx_unthrottle(struct tty_struct *tty);
static void digi_set_termios(struct tty_struct *tty,
			     struct usb_serial_port *port,
			     const struct ktermios *old_termios);
static int digi_break_ctl(struct tty_struct *tty, int break_state);
static int digi_tiocmget(struct tty_struct *tty);
static int digi_tiocmset(struct tty_struct *tty, unsigned int set,
		unsigned int clear);
static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
		const unsigned char *buf, int count);
static void digi_write_bulk_callback(struct urb *urb);
static unsigned int digi_write_room(struct tty_struct *tty);
static unsigned int digi_chars_in_buffer(struct tty_struct *tty);
static int digi_open(struct tty_struct *tty, struct usb_serial_port *port);
static void digi_close(struct usb_serial_port *port);
static void digi_dtr_rts(struct usb_serial_port *port, int on);
static int digi_startup_device(struct usb_serial *serial);
static int digi_startup(struct usb_serial *serial);
static void digi_disconnect(struct usb_serial *serial);
static void digi_release(struct usb_serial *serial);
static int digi_port_probe(struct usb_serial_port *port);
static void digi_port_remove(struct usb_serial_port *port);
static void digi_read_bulk_callback(struct urb *urb);
static int digi_read_inb_callback(struct urb *urb);
static int digi_read_oob_callback(struct urb *urb);


static const struct usb_device_id id_table_combined[] = {
	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
	{ }						/* Terminating entry */
};

static const struct usb_device_id id_table_2[] = {
	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_2_ID) },
	{ }						/* Terminating entry */
};

static const struct usb_device_id id_table_4[] = {
	{ USB_DEVICE(DIGI_VENDOR_ID, DIGI_4_ID) },
	{ }						/* Terminating entry */
};

MODULE_DEVICE_TABLE(usb, id_table_combined);

/* device info needed for the Digi serial converter */

static struct usb_serial_driver digi_acceleport_2_device = {
	.driver = {
		.name =			"digi_2",
	},
	.description =			"Digi 2 port USB adapter",
	.id_table =			id_table_2,
	.num_ports =			3,

Annotation

Implementation Notes