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Commit 0eafe4de authored by Donald's avatar Donald Committed by Greg Kroah-Hartman
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USB: serial: mos7840: add support for MCS7810 devices 



This patch added the support of MCS7810 device for the mos7840 driver.
The MCS7810 device supports single USB2.0-to-Serial port with
a LED indicator for reflecting transmission or reception activity.

Signed-off-by: default avatarDonald Lee <donald@asix.com.tw>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent c256667f

drivers/usb/serial/mos7840.c

+188 −14
Original line number Diff line number Diff line
@@ -114,6 +114,7 @@ 
#define USB_VENDOR_ID_MOSCHIP           0x9710

#define MOSCHIP_DEVICE_ID_7840          0x7840

#define MOSCHIP_DEVICE_ID_7820          0x7820

#define MOSCHIP_DEVICE_ID_7810          0x7810

/* The native component can have its vendor/device id's overridden

 * in vendor-specific implementations.  Such devices can be handled

 * by making a change here, in moschip_port_id_table, and in
@@ -184,10 +185,16 @@ 
#define NUM_URBS                        16	/* URB Count */

#define URB_TRANSFER_BUFFER_SIZE        32	/* URB Size  */



/* LED on/off milliseconds*/

#define LED_ON_MS	500

#define LED_OFF_MS	500



static int device_type;



static const struct usb_device_id moschip_port_id_table[] = {

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
@@ -209,6 +216,7 @@ static const struct usb_device_id moschip_port_id_table[] = { 
static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},

	{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},

	{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
@@ -261,8 +269,13 @@ struct moschip_port { 
	struct urb *write_urb_pool[NUM_URBS];

	char busy[NUM_URBS];

	bool read_urb_busy;

};



	/* For device(s) with LED indicator */

	bool has_led;

	bool led_flag;

	struct timer_list led_timer1;	/* Timer for LED on */

	struct timer_list led_timer2;	/* Timer for LED off */

};



static bool debug;
@@ -572,6 +585,69 @@ static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg, 
	return ret;

}



static void mos7840_set_led_callback(struct urb *urb)

{

	switch (urb->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", __func__,

			urb->status);

		break;

	default:

		dbg("%s - nonzero urb status received: %d", __func__,

			urb->status);

	}

}



static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,

				__u16 reg)

{

	struct usb_device *dev = mcs->port->serial->dev;

	struct usb_ctrlrequest *dr = mcs->dr;



	dr->bRequestType = MCS_WR_RTYPE;

	dr->bRequest = MCS_WRREQ;

	dr->wValue = cpu_to_le16(wval);

	dr->wIndex = cpu_to_le16(reg);

	dr->wLength = cpu_to_le16(0);



	usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),

		(unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);



	usb_submit_urb(mcs->control_urb, GFP_ATOMIC);

}



static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,

				__u16 val)

{

	struct usb_device *dev = port->serial->dev;



	usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,

			val, reg, NULL, 0, MOS_WDR_TIMEOUT);

}



static void mos7840_led_off(unsigned long arg)

{

	struct moschip_port *mcs = (struct moschip_port *) arg;



	/* Turn off LED */

	mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);

	mod_timer(&mcs->led_timer2,

				jiffies + msecs_to_jiffies(LED_OFF_MS));

}



static void mos7840_led_flag_off(unsigned long arg)

{

	struct moschip_port *mcs = (struct moschip_port *) arg;



	mcs->led_flag = false;

}



/*****************************************************************************

 * mos7840_interrupt_callback

 *	this is the callback function for when we have received data on the
@@ -792,6 +868,14 @@ static void mos7840_bulk_in_callback(struct urb *urb) 
		return;

	}



	/* Turn on LED */

	if (mos7840_port->has_led && !mos7840_port->led_flag) {

		mos7840_port->led_flag = true;

		mos7840_set_led_async(mos7840_port, 0x0301,

					MODEM_CONTROL_REGISTER);

		mod_timer(&mos7840_port->led_timer1,

				jiffies + msecs_to_jiffies(LED_ON_MS));

	}



	mos7840_port->read_urb_busy = true;

	retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
@@ -1554,6 +1638,14 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port, 
	data1 = urb->transfer_buffer;

	dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);



	/* Turn on LED */

	if (mos7840_port->has_led && !mos7840_port->led_flag) {

		mos7840_port->led_flag = true;

		mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);

		mod_timer(&mos7840_port->led_timer1,

				jiffies + msecs_to_jiffies(LED_ON_MS));

	}



	/* send it down the pipe */

	status = usb_submit_urb(urb, GFP_ATOMIC);
@@ -2327,28 +2419,74 @@ static int mos7840_ioctl(struct tty_struct *tty, 
	return -ENOIOCTLCMD;

}



static int mos7810_check(struct usb_serial *serial)

{

	int i, pass_count = 0;

	__u16 data = 0, mcr_data = 0;

	__u16 test_pattern = 0x55AA;



	/* Store MCR setting */

	usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),

		MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,

		&mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);



	for (i = 0; i < 16; i++) {

		/* Send the 1-bit test pattern out to MCS7810 test pin */

		usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),

			MCS_WRREQ, MCS_WR_RTYPE,

			(0x0300 | (((test_pattern >> i) & 0x0001) << 1)),

			MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);



		/* Read the test pattern back */

		usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),

			MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,

			VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);



		/* If this is a MCS7810 device, both test patterns must match */

		if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)

			break;



		pass_count++;

	}



	/* Restore MCR setting */

	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,

		MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,

		0, MOS_WDR_TIMEOUT);



	if (pass_count == 16)

		return 1;



	return 0;

}



static int mos7840_calc_num_ports(struct usb_serial *serial)

{

	__u16 Data = 0x00;

	int ret = 0;

	__u16 data = 0x00;

	int mos7840_num_ports;



	ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),

		MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,

	usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),

		MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,

		VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);



	if ((Data & 0x01) == 0) {

		mos7840_num_ports = 2;

		serial->num_bulk_in = 2;

		serial->num_bulk_out = 2;

		serial->num_ports = 2;

	if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||

		serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {

		device_type = serial->dev->descriptor.idProduct;

	} else {

		mos7840_num_ports = 4;

		serial->num_bulk_in = 4;

		serial->num_bulk_out = 4;

		serial->num_ports = 4;

		/* For a MCS7840 device GPIO0 must be set to 1 */

		if ((data & 0x01) == 1)

			device_type = MOSCHIP_DEVICE_ID_7840;

		else if (mos7810_check(serial))

			device_type = MOSCHIP_DEVICE_ID_7810;

		else

			device_type = MOSCHIP_DEVICE_ID_7820;

	}



	mos7840_num_ports = (device_type >> 4) & 0x000F;

	serial->num_bulk_in = mos7840_num_ports;

	serial->num_bulk_out = mos7840_num_ports;

	serial->num_ports = mos7840_num_ports;



	return mos7840_num_ports;

}
@@ -2563,6 +2701,34 @@ static int mos7840_startup(struct usb_serial *serial) 
			status = -ENOMEM;

			goto error;

		}



		mos7840_port->has_led = false;



		/* Initialize LED timers */

		if (device_type == MOSCHIP_DEVICE_ID_7810) {

			mos7840_port->has_led = true;



			init_timer(&mos7840_port->led_timer1);

			mos7840_port->led_timer1.function = mos7840_led_off;

			mos7840_port->led_timer1.expires =

					jiffies + msecs_to_jiffies(LED_ON_MS);

			mos7840_port->led_timer1.data =

						(unsigned long)mos7840_port;



			init_timer(&mos7840_port->led_timer2);

			mos7840_port->led_timer2.function =

						mos7840_led_flag_off;

			mos7840_port->led_timer2.expires =

					jiffies + msecs_to_jiffies(LED_OFF_MS);

			mos7840_port->led_timer2.data =

						(unsigned long)mos7840_port;



			mos7840_port->led_flag = false;



			/* Turn off LED */

			mos7840_set_led_sync(serial->port[i],

						MODEM_CONTROL_REGISTER, 0x0300);

		}

	}

	dbg ("mos7840_startup: all ports configured...........");
@@ -2654,6 +2820,14 @@ static void mos7840_release(struct usb_serial *serial) 
		mos7840_port = mos7840_get_port_private(serial->port[i]);

		dbg("mos7840_port %d = %p", i, mos7840_port);

		if (mos7840_port) {

			if (mos7840_port->has_led) {

				/* Turn off LED */

				mos7840_set_led_sync(mos7840_port->port,

						MODEM_CONTROL_REGISTER, 0x0300);



				del_timer_sync(&mos7840_port->led_timer1);

				del_timer_sync(&mos7840_port->led_timer2);

			}

			kfree(mos7840_port->ctrl_buf);

			kfree(mos7840_port->dr);

			kfree(mos7840_port);