USB: option: Use generic USB wwan code (8b4c6a3a) · Commits · 方亚芬 / linux

drivers/usb/serial/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -581,6 +581,7 @@ config USB_SERIAL_WWAN

		config USB_SERIAL_OPTION
		tristate "USB driver for GSM and CDMA modems"
		select USB_SERIAL_WWAN
		help
		Say Y here if you have a GSM or CDMA modem that's connected to USB.

drivers/usb/serial/option.c

+26 −646

Original line number	Diff line number	Diff line
		@@ -42,34 +42,13 @@
		#include <linux/bitops.h>
		#include <linux/usb.h>
		#include <linux/usb/serial.h>
		#include "usb-wwan.h"

		/* Function prototypes */
		static int option_probe(struct usb_serial *serial,
		const struct usb_device_id *id);
		static int option_open(struct tty_struct tty, struct usb_serial_port port);
		static void option_close(struct usb_serial_port *port);
		static void option_dtr_rts(struct usb_serial_port *port, int on);

		static int option_startup(struct usb_serial *serial);
		static void option_disconnect(struct usb_serial *serial);
		static void option_release(struct usb_serial *serial);
		static int option_write_room(struct tty_struct *tty);

		static void option_instat_callback(struct urb *urb);

		static int option_write(struct tty_struct tty, struct usb_serial_port port,
		const unsigned char *buf, int count);
		static int option_chars_in_buffer(struct tty_struct *tty);
		static void option_set_termios(struct tty_struct *tty,
		struct usb_serial_port port, struct ktermios old);
		static int option_tiocmget(struct tty_struct tty, struct file file);
		static int option_tiocmset(struct tty_struct tty, struct file file,
		unsigned int set, unsigned int clear);
		static int option_send_setup(struct usb_serial_port *port);
		#ifdef CONFIG_PM
		static int option_suspend(struct usb_serial *serial, pm_message_t message);
		static int option_resume(struct usb_serial *serial);
		#endif
		static void option_instat_callback(struct urb *urb);

		/* Vendor and product IDs */
		#define OPTION_VENDOR_ID 0x0AF0
		@@ -757,22 +736,22 @@ static struct usb_serial_driver option_1port_device = {
		.id_table = option_ids,
		.num_ports = 1,
		.probe = option_probe,
		.open = option_open,
		.close = option_close,
		.dtr_rts = option_dtr_rts,
		.write = option_write,
		.write_room = option_write_room,
		.chars_in_buffer = option_chars_in_buffer,
		.set_termios = option_set_termios,
		.tiocmget = option_tiocmget,
		.tiocmset = option_tiocmset,
		.attach = option_startup,
		.disconnect = option_disconnect,
		.release = option_release,
		.open = usb_wwan_open,
		.close = usb_wwan_close,
		.dtr_rts = usb_wwan_dtr_rts,
		.write = usb_wwan_write,
		.write_room = usb_wwan_write_room,
		.chars_in_buffer = usb_wwan_chars_in_buffer,
		.set_termios = usb_wwan_set_termios,
		.tiocmget = usb_wwan_tiocmget,
		.tiocmset = usb_wwan_tiocmset,
		.attach = usb_wwan_startup,
		.disconnect = usb_wwan_disconnect,
		.release = usb_wwan_release,
		.read_int_callback = option_instat_callback,
		#ifdef CONFIG_PM
		.suspend = option_suspend,
		.resume = option_resume,
		.suspend = usb_wwan_suspend,
		.resume = usb_wwan_resume,
		#endif
		};

		@@ -785,13 +764,6 @@ static int debug;
		#define IN_BUFLEN 4096
		#define OUT_BUFLEN 4096

		struct option_intf_private {
		spinlock_t susp_lock;
		unsigned int suspended:1;
		int in_flight;
		struct option_blacklist_info *blacklist_info;
		};

		struct option_port_private {
		/* Input endpoints and buffer for this port */
		struct urb *in_urbs[N_IN_URB];
		@@ -848,8 +820,7 @@ module_exit(option_exit);
		static int option_probe(struct usb_serial *serial,
		const struct usb_device_id *id)
		{
		struct option_intf_private *data;

		struct usb_wwan_intf_private *data;
		/* D-Link DWM 652 still exposes CD-Rom emulation interface in modem mode */
		if (serial->dev->descriptor.idVendor == DLINK_VENDOR_ID &&
		serial->dev->descriptor.idProduct == DLINK_PRODUCT_DWM_652 &&
		@@ -862,11 +833,13 @@ static int option_probe(struct usb_serial *serial,
		serial->interface->cur_altsetting->desc.bInterfaceClass != 0xff)
		return -ENODEV;

		data = serial->private = kzalloc(sizeof(struct option_intf_private), GFP_KERNEL);
		data = serial->private = kzalloc(sizeof(struct usb_wwan_intf_private), GFP_KERNEL);

		if (!data)
		return -ENOMEM;
		data->send_setup = option_send_setup;
		spin_lock_init(&data->susp_lock);
		data->blacklist_info = (struct option_blacklist_info*) id->driver_info;
		data->private = (void *)id->driver_info;
		return 0;
		}

		@@ -887,205 +860,6 @@ static enum option_blacklist_reason is_blacklisted(const u8 ifnum,
		return OPTION_BLACKLIST_NONE;
		}

		static void option_set_termios(struct tty_struct *tty,
		struct usb_serial_port port, struct ktermios old_termios)
		{
		dbg("%s", __func__);
		/* Doesn't support option setting */
		tty_termios_copy_hw(tty->termios, old_termios);
		option_send_setup(port);
		}

		static int option_tiocmget(struct tty_struct tty, struct file file)
		{
		struct usb_serial_port *port = tty->driver_data;
		unsigned int value;
		struct option_port_private *portdata;

		portdata = usb_get_serial_port_data(port);

		value = ((portdata->rts_state) ? TIOCM_RTS : 0) \|
		((portdata->dtr_state) ? TIOCM_DTR : 0) \|
		((portdata->cts_state) ? TIOCM_CTS : 0) \|
		((portdata->dsr_state) ? TIOCM_DSR : 0) \|
		((portdata->dcd_state) ? TIOCM_CAR : 0) \|
		((portdata->ri_state) ? TIOCM_RNG : 0);

		return value;
		}

		static int option_tiocmset(struct tty_struct tty, struct file file,
		unsigned int set, unsigned int clear)
		{
		struct usb_serial_port *port = tty->driver_data;
		struct option_port_private *portdata;

		portdata = usb_get_serial_port_data(port);

		/* FIXME: what locks portdata fields ? */
		if (set & TIOCM_RTS)
		portdata->rts_state = 1;
		if (set & TIOCM_DTR)
		portdata->dtr_state = 1;

		if (clear & TIOCM_RTS)
		portdata->rts_state = 0;
		if (clear & TIOCM_DTR)
		portdata->dtr_state = 0;
		return option_send_setup(port);
		}

		/* Write */
		static int option_write(struct tty_struct tty, struct usb_serial_port port,
		const unsigned char *buf, int count)
		{
		struct option_port_private *portdata;
		struct option_intf_private *intfdata;
		int i;
		int left, todo;
		struct urb this_urb = NULL; / spurious */
		int err;
		unsigned long flags;

		portdata = usb_get_serial_port_data(port);
		intfdata = port->serial->private;

		dbg("%s: write (%d chars)", __func__, count);

		i = 0;
		left = count;
		for (i = 0; left > 0 && i < N_OUT_URB; i++) {
		todo = left;
		if (todo > OUT_BUFLEN)
		todo = OUT_BUFLEN;

		this_urb = portdata->out_urbs[i];
		if (test_and_set_bit(i, &portdata->out_busy)) {
		if (time_before(jiffies,
		portdata->tx_start_time[i] + 10 * HZ))
		continue;
		usb_unlink_urb(this_urb);
		continue;
		}
		dbg("%s: endpoint %d buf %d", __func__,
		usb_pipeendpoint(this_urb->pipe), i);

		err = usb_autopm_get_interface_async(port->serial->interface);
		if (err < 0)
		break;

		/* send the data */
		memcpy(this_urb->transfer_buffer, buf, todo);
		this_urb->transfer_buffer_length = todo;

		spin_lock_irqsave(&intfdata->susp_lock, flags);
		if (intfdata->suspended) {
		usb_anchor_urb(this_urb, &portdata->delayed);
		spin_unlock_irqrestore(&intfdata->susp_lock, flags);
		} else {
		intfdata->in_flight++;
		spin_unlock_irqrestore(&intfdata->susp_lock, flags);
		err = usb_submit_urb(this_urb, GFP_ATOMIC);
		if (err) {
		dbg("usb_submit_urb %p (write bulk) failed "
		"(%d)", this_urb, err);
		clear_bit(i, &portdata->out_busy);
		spin_lock_irqsave(&intfdata->susp_lock, flags);
		intfdata->in_flight--;
		spin_unlock_irqrestore(&intfdata->susp_lock, flags);
		continue;
		}
		}

		portdata->tx_start_time[i] = jiffies;
		buf += todo;
		left -= todo;
		}

		count -= left;
		dbg("%s: wrote (did %d)", __func__, count);
		return count;
		}

		static void option_indat_callback(struct urb *urb)
		{
		int err;
		int endpoint;
		struct usb_serial_port *port;
		struct tty_struct *tty;
		unsigned char *data = urb->transfer_buffer;
		int status = urb->status;

		dbg("%s: %p", __func__, urb);

		endpoint = usb_pipeendpoint(urb->pipe);
		port = urb->context;

		switch (status) {
		case 0:
		/* success */
		break;
		case -ECONNRESET:
		case -ENOENT:
		case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dbg("%s: urb shutting down with status: %d on endpoint %02x.",
		__func__, status, endpoint);
		return;
		default:
		dbg("%s: nonzero status: %d on endpoint %02x.",
		__func__, status, endpoint);
		goto exit;
		}

		if (urb->actual_length) {
		tty = tty_port_tty_get(&port->port);
		tty_insert_flip_string(tty, data, urb->actual_length);
		tty_flip_buffer_push(tty);
		tty_kref_put(tty);
		} else
		dbg("%s: empty read urb received", __func__);

		exit:
		/* Resubmit urb so we continue receiving */
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err && err != -EPERM)
		printk(KERN_ERR "%s: resubmit read urb failed. "
		"(%d)", __func__, err);
		else
		usb_mark_last_busy(port->serial->dev);

		return;
		}

		static void option_outdat_callback(struct urb *urb)
		{
		struct usb_serial_port *port;
		struct option_port_private *portdata;
		struct option_intf_private *intfdata;
		int i;

		dbg("%s", __func__);

		port = urb->context;
		intfdata = port->serial->private;

		usb_serial_port_softint(port);
		usb_autopm_put_interface_async(port->serial->interface);
		portdata = usb_get_serial_port_data(port);
		spin_lock(&intfdata->susp_lock);
		intfdata->in_flight--;
		spin_unlock(&intfdata->susp_lock);

		for (i = 0; i < N_OUT_URB; ++i) {
		if (portdata->out_urbs[i] == urb) {
		smp_mb__before_clear_bit();
		clear_bit(i, &portdata->out_busy);
		break;
		}
		}
		}

		static void option_instat_callback(struct urb *urb)
		{
		int err;
		@@ -1142,183 +916,6 @@ static void option_instat_callback(struct urb *urb)
		}
		}

		static int option_write_room(struct tty_struct *tty)
		{
		struct usb_serial_port *port = tty->driver_data;
		struct option_port_private *portdata;
		int i;
		int data_len = 0;
		struct urb *this_urb;

		portdata = usb_get_serial_port_data(port);

		for (i = 0; i < N_OUT_URB; i++) {
		this_urb = portdata->out_urbs[i];
		if (this_urb && !test_bit(i, &portdata->out_busy))
		data_len += OUT_BUFLEN;
		}

		dbg("%s: %d", __func__, data_len);
		return data_len;
		}

		static int option_chars_in_buffer(struct tty_struct *tty)
		{
		struct usb_serial_port *port = tty->driver_data;
		struct option_port_private *portdata;
		int i;
		int data_len = 0;
		struct urb *this_urb;

		portdata = usb_get_serial_port_data(port);

		for (i = 0; i < N_OUT_URB; i++) {
		this_urb = portdata->out_urbs[i];
		/* FIXME: This locking is insufficient as this_urb may
		go unused during the test */
		if (this_urb && test_bit(i, &portdata->out_busy))
		data_len += this_urb->transfer_buffer_length;
		}
		dbg("%s: %d", __func__, data_len);
		return data_len;
		}

		static int option_open(struct tty_struct tty, struct usb_serial_port port)
		{
		struct option_port_private *portdata;
		struct option_intf_private *intfdata;
		struct usb_serial *serial = port->serial;
		int i, err;
		struct urb *urb;

		portdata = usb_get_serial_port_data(port);
		intfdata = serial->private;

		dbg("%s", __func__);

		/* Start reading from the IN endpoint */
		for (i = 0; i < N_IN_URB; i++) {
		urb = portdata->in_urbs[i];
		if (!urb)
		continue;
		err = usb_submit_urb(urb, GFP_KERNEL);
		if (err) {
		dbg("%s: submit urb %d failed (%d) %d",
		__func__, i, err,
		urb->transfer_buffer_length);
		}
		}

		option_send_setup(port);

		serial->interface->needs_remote_wakeup = 1;
		spin_lock_irq(&intfdata->susp_lock);
		portdata->opened = 1;
		spin_unlock_irq(&intfdata->susp_lock);
		usb_autopm_put_interface(serial->interface);

		return 0;
		}

		static void option_dtr_rts(struct usb_serial_port *port, int on)
		{
		struct usb_serial *serial = port->serial;
		struct option_port_private *portdata;

		dbg("%s", __func__);
		portdata = usb_get_serial_port_data(port);
		mutex_lock(&serial->disc_mutex);
		portdata->rts_state = on;
		portdata->dtr_state = on;
		if (serial->dev)
		option_send_setup(port);
		mutex_unlock(&serial->disc_mutex);
		}


		static void option_close(struct usb_serial_port *port)
		{
		int i;
		struct usb_serial *serial = port->serial;
		struct option_port_private *portdata;
		struct option_intf_private *intfdata = port->serial->private;

		dbg("%s", __func__);
		portdata = usb_get_serial_port_data(port);

		if (serial->dev) {
		/* Stop reading/writing urbs */
		spin_lock_irq(&intfdata->susp_lock);
		portdata->opened = 0;
		spin_unlock_irq(&intfdata->susp_lock);

		for (i = 0; i < N_IN_URB; i++)
		usb_kill_urb(portdata->in_urbs[i]);
		for (i = 0; i < N_OUT_URB; i++)
		usb_kill_urb(portdata->out_urbs[i]);
		usb_autopm_get_interface(serial->interface);
		serial->interface->needs_remote_wakeup = 0;
		}
		}

		/* Helper functions used by option_setup_urbs */
		static struct urb option_setup_urb(struct usb_serial serial, int endpoint,
		int dir, void ctx, char buf, int len,
		void (callback)(struct urb ))
		{
		struct urb *urb;

		if (endpoint == -1)
		return NULL; /* endpoint not needed */

		urb = usb_alloc_urb(0, GFP_KERNEL); /* No ISO */
		if (urb == NULL) {
		dbg("%s: alloc for endpoint %d failed.", __func__, endpoint);
		return NULL;
		}

		/* Fill URB using supplied data. */
		usb_fill_bulk_urb(urb, serial->dev,
		usb_sndbulkpipe(serial->dev, endpoint) \| dir,
		buf, len, callback, ctx);

		return urb;
		}

		/* Setup urbs */
		static void option_setup_urbs(struct usb_serial *serial)
		{
		int i, j;
		struct usb_serial_port *port;
		struct option_port_private *portdata;

		dbg("%s", __func__);

		for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);

		/* Do indat endpoints first */
		for (j = 0; j < N_IN_URB; ++j) {
		portdata->in_urbs[j] = option_setup_urb(serial,
		port->bulk_in_endpointAddress,
		USB_DIR_IN, port,
		portdata->in_buffer[j],
		IN_BUFLEN, option_indat_callback);
		}

		/* outdat endpoints */
		for (j = 0; j < N_OUT_URB; ++j) {
		portdata->out_urbs[j] = option_setup_urb(serial,
		port->bulk_out_endpointAddress,
		USB_DIR_OUT, port,
		portdata->out_buffer[j],
		OUT_BUFLEN, option_outdat_callback);
		}
		}
		}


		/** send RTS/DTR state to the port.
		*
		* This is exactly the same as SET_CONTROL_LINE_STATE from the PSTN
		@@ -1327,15 +924,16 @@ static void option_setup_urbs(struct usb_serial *serial)
		static int option_send_setup(struct usb_serial_port *port)
		{
		struct usb_serial *serial = port->serial;
		struct option_intf_private *intfdata =
		(struct option_intf_private *) serial->private;
		struct usb_wwan_intf_private *intfdata =
		(struct usb_wwan_intf_private *) serial->private;
		struct option_port_private *portdata;
		int ifNum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
		int val = 0;
		dbg("%s", __func__);

		if (is_blacklisted(ifNum, intfdata->blacklist_info) ==
		OPTION_BLACKLIST_SENDSETUP) {
		if (is_blacklisted(ifNum,
		(struct option_blacklist_info *) intfdata->private)
		== OPTION_BLACKLIST_SENDSETUP) {
		dbg("No send_setup on blacklisted interface #%d\n", ifNum);
		return -EIO;
		}
		@@ -1352,224 +950,6 @@ static int option_send_setup(struct usb_serial_port *port)
		0x22, 0x21, val, ifNum, NULL, 0, USB_CTRL_SET_TIMEOUT);
		}

		static int option_startup(struct usb_serial *serial)
		{
		int i, j, err;
		struct usb_serial_port *port;
		struct option_port_private *portdata;
		u8 *buffer;

		dbg("%s", __func__);

		/* Now setup per port private data */
		for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
		if (!portdata) {
		dbg("%s: kmalloc for option_port_private (%d) failed!.",
		__func__, i);
		return 1;
		}
		init_usb_anchor(&portdata->delayed);

		for (j = 0; j < N_IN_URB; j++) {
		buffer = (u8 *)__get_free_page(GFP_KERNEL);
		if (!buffer)
		goto bail_out_error;
		portdata->in_buffer[j] = buffer;
		}

		for (j = 0; j < N_OUT_URB; j++) {
		buffer = kmalloc(OUT_BUFLEN, GFP_KERNEL);
		if (!buffer)
		goto bail_out_error2;
		portdata->out_buffer[j] = buffer;
		}

		usb_set_serial_port_data(port, portdata);

		if (!port->interrupt_in_urb)
		continue;
		err = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
		if (err)
		dbg("%s: submit irq_in urb failed %d",
		__func__, err);
		}
		option_setup_urbs(serial);
		return 0;

		bail_out_error2:
		for (j = 0; j < N_OUT_URB; j++)
		kfree(portdata->out_buffer[j]);
		bail_out_error:
		for (j = 0; j < N_IN_URB; j++)
		if (portdata->in_buffer[j])
		free_page((unsigned long)portdata->in_buffer[j]);
		kfree(portdata);
		return 1;
		}

		static void stop_read_write_urbs(struct usb_serial *serial)
		{
		int i, j;
		struct usb_serial_port *port;
		struct option_port_private *portdata;

		/* Stop reading/writing urbs */
		for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);
		for (j = 0; j < N_IN_URB; j++)
		usb_kill_urb(portdata->in_urbs[j]);
		for (j = 0; j < N_OUT_URB; j++)
		usb_kill_urb(portdata->out_urbs[j]);
		}
		}

		static void option_disconnect(struct usb_serial *serial)
		{
		dbg("%s", __func__);

		stop_read_write_urbs(serial);
		}

		static void option_release(struct usb_serial *serial)
		{
		int i, j;
		struct usb_serial_port *port;
		struct option_port_private *portdata;

		dbg("%s", __func__);

		/* Now free them */
		for (i = 0; i < serial->num_ports; ++i) {
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);

		for (j = 0; j < N_IN_URB; j++) {
		if (portdata->in_urbs[j]) {
		usb_free_urb(portdata->in_urbs[j]);
		free_page((unsigned long)
		portdata->in_buffer[j]);
		portdata->in_urbs[j] = NULL;
		}
		}
		for (j = 0; j < N_OUT_URB; j++) {
		if (portdata->out_urbs[j]) {
		usb_free_urb(portdata->out_urbs[j]);
		kfree(portdata->out_buffer[j]);
		portdata->out_urbs[j] = NULL;
		}
		}
		}

		/* Now free per port private data */
		for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		kfree(usb_get_serial_port_data(port));
		}
		}

		#ifdef CONFIG_PM
		static int option_suspend(struct usb_serial *serial, pm_message_t message)
		{
		struct option_intf_private *intfdata = serial->private;
		int b;

		dbg("%s entered", __func__);

		if (message.event & PM_EVENT_AUTO) {
		spin_lock_irq(&intfdata->susp_lock);
		b = intfdata->in_flight;
		spin_unlock_irq(&intfdata->susp_lock);

		if (b)
		return -EBUSY;
		}

		spin_lock_irq(&intfdata->susp_lock);
		intfdata->suspended = 1;
		spin_unlock_irq(&intfdata->susp_lock);
		stop_read_write_urbs(serial);

		return 0;
		}

		static void play_delayed(struct usb_serial_port *port)
		{
		struct option_intf_private *data;
		struct option_port_private *portdata;
		struct urb *urb;
		int err;

		portdata = usb_get_serial_port_data(port);
		data = port->serial->private;
		while ((urb = usb_get_from_anchor(&portdata->delayed))) {
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (!err)
		data->in_flight++;
		}
		}

		static int option_resume(struct usb_serial *serial)
		{
		int i, j;
		struct usb_serial_port *port;
		struct option_intf_private *intfdata = serial->private;
		struct option_port_private *portdata;
		struct urb *urb;
		int err = 0;

		dbg("%s entered", __func__);
		/* get the interrupt URBs resubmitted unconditionally */
		for (i = 0; i < serial->num_ports; i++) {
		port = serial->port[i];
		if (!port->interrupt_in_urb) {
		dbg("%s: No interrupt URB for port %d", __func__, i);
		continue;
		}
		err = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
		dbg("Submitted interrupt URB for port %d (result %d)", i, err);
		if (err < 0) {
		err("%s: Error %d for interrupt URB of port%d",
		__func__, err, i);
		goto err_out;
		}
		}

		for (i = 0; i < serial->num_ports; i++) {
		/* walk all ports */
		port = serial->port[i];
		portdata = usb_get_serial_port_data(port);

		/* skip closed ports */
		spin_lock_irq(&intfdata->susp_lock);
		if (!portdata->opened) {
		spin_unlock_irq(&intfdata->susp_lock);
		continue;
		}

		for (j = 0; j < N_IN_URB; j++) {
		urb = portdata->in_urbs[j];
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err < 0) {
		err("%s: Error %d for bulk URB %d",
		__func__, err, i);
		spin_unlock_irq(&intfdata->susp_lock);
		goto err_out;
		}
		}
		play_delayed(port);
		spin_unlock_irq(&intfdata->susp_lock);
		}
		spin_lock_irq(&intfdata->susp_lock);
		intfdata->suspended = 0;
		spin_unlock_irq(&intfdata->susp_lock);
		err_out:
		return err;
		}
		#endif

		MODULE_AUTHOR(DRIVER_AUTHOR);
		MODULE_DESCRIPTION(DRIVER_DESC);
		MODULE_VERSION(DRIVER_VERSION);