linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * USB Cypress M8 driver

 *

 *  Copyright (C) 2004

 *      Lonnie Mendez (dignome@gmail.com)

 *  Copyright (C) 2003,2004

 *      Neil Whelchel (koyama@firstlight.net)

 *

 * See Documentation/usb/usb-serial.txt for more information on using this

 * driver

 *

 * See http://geocities.com/i0xox0i for information on this driver and the

 * earthmate usb device.

 */

​

/* Thanks to Neil Whelchel for writing the first cypress m8 implementation

   for linux. */

/* Thanks to cypress for providing references for the hid reports. */

/* Thanks to Jiang Zhang for providing links and for general help. */

/* Code originates and was built up from ftdi_sio, belkin, pl2303 and others.*/

​

​

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/slab.h>

#include <linux/tty.h>

#include <linux/tty_driver.h>

#include <linux/tty_flip.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/spinlock.h>

#include <linux/usb.h>

#include <linux/usb/serial.h>

#include <linux/serial.h>

#include <linux/kfifo.h>

#include <linux/delay.h>

#include <linux/uaccess.h>

#include <asm/unaligned.h>

​

#include "cypress_m8.h"

​

​

static bool stats;

static int interval;

static bool unstable_bauds;

​

#define DRIVER_AUTHOR "Lonnie Mendez <dignome@gmail.com>, Neil Whelchel <koyama@firstlight.net>"

#define DRIVER_DESC "Cypress USB to Serial Driver"

​

/* write buffer size defines */

#define CYPRESS_BUF_SIZE    1024

​

static const struct usb_device_id id_table_earthmate[] = {

    { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },

    { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },

    { }                     /* Terminating entry */

};

​

static const struct usb_device_id id_table_cyphidcomrs232[] = {

    { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },

    { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },

    { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },

    { }                     /* Terminating entry */

};

​

static const struct usb_device_id id_table_nokiaca42v2[] = {

    { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },

    { }                     /* Terminating entry */

};

​

static const struct usb_device_id id_table_combined[] = {

    { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB) },

    { USB_DEVICE(VENDOR_ID_DELORME, PRODUCT_ID_EARTHMATEUSB_LT20) },

    { USB_DEVICE(VENDOR_ID_CYPRESS, PRODUCT_ID_CYPHIDCOM) },

    { USB_DEVICE(VENDOR_ID_POWERCOM, PRODUCT_ID_UPS) },

    { USB_DEVICE(VENDOR_ID_FRWD, PRODUCT_ID_CYPHIDCOM_FRWD) },

    { USB_DEVICE(VENDOR_ID_DAZZLE, PRODUCT_ID_CA42) },

    { }                     /* Terminating entry */

};

​

MODULE_DEVICE_TABLE(usb, id_table_combined);

​

enum packet_format {

    packet_format_1,  /* b0:status, b1:payload count */

    packet_format_2   /* b0[7:3]:status, b0[2:0]:payload count */

};

​

struct cypress_private {

    spinlock_t lock;           /* private lock */

    int chiptype;              /* identifier of device, for quirks/etc */

    int bytes_in;              /* used for statistics */