^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This program is largely derived from the Belkin USB Serial Adapter Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * (see belkin_sa.[ch]). All of the information about the device was acquired
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * by using SniffUSB on Windows98. For technical details see mct_u232.h.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * William G. Greathouse and Greg Kroah-Hartman provided great help on how to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * do the reverse engineering and how to write a USB serial device driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * TO BE DONE, TO BE CHECKED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * DTR/RTS signal handling may be incomplete or incorrect. I have mainly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * implemented what I have seen with SniffUSB or found in belkin_sa.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * For further TODOs check also belkin_sa.c.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/tty_driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/tty_flip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <asm/unaligned.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/usb/serial.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/serial.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include "mct_u232.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * Function prototypes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static int mct_u232_port_probe(struct usb_serial_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static int mct_u232_port_remove(struct usb_serial_port *remove);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void mct_u232_close(struct usb_serial_port *port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static void mct_u232_dtr_rts(struct usb_serial_port *port, int on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static void mct_u232_read_int_callback(struct urb *urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static void mct_u232_set_termios(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct usb_serial_port *port, struct ktermios *old);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void mct_u232_break_ctl(struct tty_struct *tty, int break_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static int mct_u232_tiocmget(struct tty_struct *tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static int mct_u232_tiocmset(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) unsigned int set, unsigned int clear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static void mct_u232_throttle(struct tty_struct *tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void mct_u232_unthrottle(struct tty_struct *tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * All of the device info needed for the MCT USB-RS232 converter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static const struct usb_device_id id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) { } /* Terminating entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) MODULE_DEVICE_TABLE(usb, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static struct usb_serial_driver mct_u232_device = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .name = "mct_u232",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .description = "MCT U232",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .id_table = id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .num_ports = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) .open = mct_u232_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .close = mct_u232_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .dtr_rts = mct_u232_dtr_rts,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) .throttle = mct_u232_throttle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .unthrottle = mct_u232_unthrottle,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .read_int_callback = mct_u232_read_int_callback,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .set_termios = mct_u232_set_termios,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .break_ctl = mct_u232_break_ctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .tiocmget = mct_u232_tiocmget,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) .tiocmset = mct_u232_tiocmset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .tiocmiwait = usb_serial_generic_tiocmiwait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .port_probe = mct_u232_port_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .port_remove = mct_u232_port_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .get_icount = usb_serial_generic_get_icount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static struct usb_serial_driver * const serial_drivers[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) &mct_u232_device, NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct mct_u232_private {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) struct urb *read_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) unsigned int control_state; /* Modem Line Setting (TIOCM) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) unsigned char last_lcr; /* Line Control Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) unsigned char last_lsr; /* Line Status Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned char last_msr; /* Modem Status Register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned int rx_flags; /* Throttling flags */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define THROTTLED 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * Handle vendor specific USB requests
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define WDR_TIMEOUT 5000 /* default urb timeout */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * Later day 2.6.0-test kernels have new baud rates like B230400 which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * we do not know how to support. We ignore them for the moment.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static int mct_u232_calculate_baud_rate(struct usb_serial *serial,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) speed_t value, speed_t *result)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) *result = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) switch (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) case 300:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return 0x01;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) case 600:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 0x02; /* this one not tested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) case 1200:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return 0x03;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) case 2400:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0x04;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) case 4800:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0x06;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) case 9600:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 0x08;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) case 19200:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0x09;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) case 38400:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return 0x0a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) case 57600:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return 0x0b;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) case 115200:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return 0x0c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) *result = 9600;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return 0x08;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) /* FIXME: Can we use any divider - should we do
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) divider = 115200/value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) real baud = 115200/divider */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) switch (value) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) case 300: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) case 600: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) case 1200: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) case 2400: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) case 4800: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) case 9600: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) case 19200: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) case 38400: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) case 57600: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) case 115200: break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) value = 9600;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) *result = 9600;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) return 115200/value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static int mct_u232_set_baud_rate(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) struct usb_serial *serial, struct usb_serial_port *port, speed_t value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) unsigned int divisor;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) unsigned char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) unsigned char cts_enable_byte = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) speed_t speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (buf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) divisor = mct_u232_calculate_baud_rate(serial, value, &speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) put_unaligned_le32(divisor, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) MCT_U232_SET_BAUD_RATE_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) MCT_U232_SET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 0, 0, buf, MCT_U232_SET_BAUD_RATE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (rc < 0) /*FIXME: What value speed results */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) dev_err(&port->dev, "Set BAUD RATE %d failed (error = %d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) value, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) tty_encode_baud_rate(tty, speed, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) dev_dbg(&port->dev, "set_baud_rate: value: 0x%x, divisor: 0x%x\n", value, divisor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) always sends two extra USB 'device request' messages after the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 'baud rate change' message. The actual functionality of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) request codes in these messages is not fully understood but these
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) particular codes are never seen in any operation besides a baud
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) rate change. Both of these messages send a single byte of data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) In the first message, the value of this byte is always zero.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) The second message has been determined experimentally to control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) whether data will be transmitted to a device which is not asserting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) the 'CTS' signal. If the second message's data byte is zero, data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) will be transmitted even if 'CTS' is not asserted (i.e. no hardware
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) flow control). if the second message's data byte is nonzero (a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) value of 1 is used by this driver), data will not be transmitted to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) a device which is not asserting 'CTS'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) buf[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) MCT_U232_SET_UNKNOWN1_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) MCT_U232_SET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 0, 0, buf, MCT_U232_SET_UNKNOWN1_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) dev_err(&port->dev, "Sending USB device request code %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) "failed (error = %d)\n", MCT_U232_SET_UNKNOWN1_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (port && C_CRTSCTS(tty))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) cts_enable_byte = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) dev_dbg(&port->dev, "set_baud_rate: send second control message, data = %02X\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) cts_enable_byte);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) buf[0] = cts_enable_byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) MCT_U232_SET_CTS_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) MCT_U232_SET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 0, 0, buf, MCT_U232_SET_CTS_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) dev_err(&port->dev, "Sending USB device request code %d "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) "failed (error = %d)\n", MCT_U232_SET_CTS_REQUEST, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) } /* mct_u232_set_baud_rate */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) static int mct_u232_set_line_ctrl(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) unsigned char lcr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) unsigned char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (buf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) buf[0] = lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) MCT_U232_SET_LINE_CTRL_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) MCT_U232_SET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 0, 0, buf, MCT_U232_SET_LINE_CTRL_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) dev_err(&port->dev, "Set LINE CTRL 0x%x failed (error = %d)\n", lcr, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) dev_dbg(&port->dev, "set_line_ctrl: 0x%x\n", lcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) } /* mct_u232_set_line_ctrl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int mct_u232_set_modem_ctrl(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) unsigned int control_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) unsigned char mcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) unsigned char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) if (buf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) mcr = MCT_U232_MCR_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (control_state & TIOCM_DTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) mcr |= MCT_U232_MCR_DTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) if (control_state & TIOCM_RTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) mcr |= MCT_U232_MCR_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) buf[0] = mcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) rc = usb_control_msg(port->serial->dev, usb_sndctrlpipe(port->serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) MCT_U232_SET_MODEM_CTRL_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) MCT_U232_SET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 0, 0, buf, MCT_U232_SET_MODEM_CTRL_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) dev_dbg(&port->dev, "set_modem_ctrl: state=0x%x ==> mcr=0x%x\n", control_state, mcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (rc < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) dev_err(&port->dev, "Set MODEM CTRL 0x%x failed (error = %d)\n", mcr, rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) } /* mct_u232_set_modem_ctrl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) static int mct_u232_get_modem_stat(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) unsigned char *msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) unsigned char *buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) buf = kmalloc(MCT_U232_MAX_SIZE, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) if (buf == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) *msr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) rc = usb_control_msg(port->serial->dev, usb_rcvctrlpipe(port->serial->dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) MCT_U232_GET_MODEM_STAT_REQUEST,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) MCT_U232_GET_REQUEST_TYPE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 0, 0, buf, MCT_U232_GET_MODEM_STAT_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) WDR_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (rc < MCT_U232_GET_MODEM_STAT_SIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) dev_err(&port->dev, "Get MODEM STATus failed (error = %d)\n", rc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) if (rc >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) rc = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) *msr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) *msr = buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) dev_dbg(&port->dev, "get_modem_stat: 0x%x\n", *msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) kfree(buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) } /* mct_u232_get_modem_stat */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) static void mct_u232_msr_to_icount(struct async_icount *icount,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) unsigned char msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) /* Translate Control Line states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (msr & MCT_U232_MSR_DDSR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) icount->dsr++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) if (msr & MCT_U232_MSR_DCTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) icount->cts++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (msr & MCT_U232_MSR_DRI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) icount->rng++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (msr & MCT_U232_MSR_DCD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) icount->dcd++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) } /* mct_u232_msr_to_icount */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static void mct_u232_msr_to_state(struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) unsigned int *control_state, unsigned char msr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) /* Translate Control Line states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (msr & MCT_U232_MSR_DSR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) *control_state |= TIOCM_DSR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) *control_state &= ~TIOCM_DSR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (msr & MCT_U232_MSR_CTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *control_state |= TIOCM_CTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) *control_state &= ~TIOCM_CTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (msr & MCT_U232_MSR_RI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *control_state |= TIOCM_RI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) *control_state &= ~TIOCM_RI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) if (msr & MCT_U232_MSR_CD)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) *control_state |= TIOCM_CD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) *control_state &= ~TIOCM_CD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) dev_dbg(&port->dev, "msr_to_state: msr=0x%x ==> state=0x%x\n", msr, *control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) } /* mct_u232_msr_to_state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) * Driver's tty interface functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) static int mct_u232_port_probe(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) struct usb_serial *serial = port->serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) struct mct_u232_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) /* check first to simplify error handling */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) if (!serial->port[1] || !serial->port[1]->interrupt_in_urb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) dev_err(&port->dev, "expected endpoint missing\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) priv = kzalloc(sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) /* Use second interrupt-in endpoint for reading. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) priv->read_urb = serial->port[1]->interrupt_in_urb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) priv->read_urb->context = port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) spin_lock_init(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) usb_set_serial_port_data(port, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) static int mct_u232_port_remove(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) struct mct_u232_private *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) kfree(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) struct usb_serial *serial = port->serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) int retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) unsigned char last_lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) unsigned char last_msr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) /* Compensate for a hardware bug: although the Sitecom U232-P25
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) * device reports a maximum output packet size of 32 bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) * it seems to be able to accept only 16 bytes (and that's what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) * SniffUSB says too...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (le16_to_cpu(serial->dev->descriptor.idProduct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) == MCT_U232_SITECOM_PID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) port->bulk_out_size = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) /* Do a defined restart: the normal serial device seems to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * always turn on DTR and RTS here, so do the same. I'm not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) * sure if this is really necessary. But it should not harm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) * either.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (tty && C_BAUD(tty))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) priv->control_state = TIOCM_DTR | TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) priv->control_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) priv->last_lcr = (MCT_U232_DATA_BITS_8 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) MCT_U232_PARITY_NONE |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) MCT_U232_STOP_BITS_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) last_lcr = priv->last_lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) mct_u232_set_line_ctrl(port, last_lcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* Read modem status and update control state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) mct_u232_get_modem_stat(port, &last_msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) priv->last_msr = last_msr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) retval = usb_submit_urb(priv->read_urb, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) "usb_submit_urb(read) failed pipe 0x%x err %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) port->read_urb->pipe, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) if (retval) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) usb_kill_urb(priv->read_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) "usb_submit_urb(read int) failed pipe 0x%x err %d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) port->interrupt_in_urb->pipe, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) } /* mct_u232_open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) static void mct_u232_dtr_rts(struct usb_serial_port *port, int on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) spin_lock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if (on)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) priv->control_state |= TIOCM_DTR | TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) spin_unlock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) static void mct_u232_close(struct usb_serial_port *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) usb_kill_urb(priv->read_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) usb_kill_urb(port->interrupt_in_urb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) usb_serial_generic_close(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) } /* mct_u232_close */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) static void mct_u232_read_int_callback(struct urb *urb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) struct usb_serial_port *port = urb->context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) unsigned char *data = urb->transfer_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) int status = urb->status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) switch (status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) /* success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) case -ECONNRESET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) case -ENOENT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) case -ESHUTDOWN:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) /* this urb is terminated, clean up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * Work-a-round: handle the 'usual' bulk-in pipe here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (urb->transfer_buffer_length > 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) if (urb->actual_length) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) tty_insert_flip_string(&port->port, data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) urb->actual_length);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) tty_flip_buffer_push(&port->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) goto exit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) * The interrupt-in pipe signals exceptional conditions (modem line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * signal changes and errors). data[0] holds MSR, data[1] holds LSR.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) priv->last_msr = data[MCT_U232_MSR_INDEX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) /* Record Control Line states */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) mct_u232_msr_to_state(port, &priv->control_state, priv->last_msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) mct_u232_msr_to_icount(&port->icount, priv->last_msr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* Not yet handled. See belkin_sa.c for further information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) /* Now to report any errors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) priv->last_lsr = data[MCT_U232_LSR_INDEX];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) * fill in the flip buffer here, but I do not know the relation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) * to the current/next receive buffer or characters. I need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) * to look in to this before committing any code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) if (priv->last_lsr & MCT_U232_LSR_ERR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) tty = tty_port_tty_get(&port->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) /* Overrun Error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (priv->last_lsr & MCT_U232_LSR_OE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) /* Parity Error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (priv->last_lsr & MCT_U232_LSR_PE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) /* Framing Error */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (priv->last_lsr & MCT_U232_LSR_FE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) /* Break Indicator */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (priv->last_lsr & MCT_U232_LSR_BI) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) tty_kref_put(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) wake_up_interruptible(&port->port.delta_msr_wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) exit:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) retval = usb_submit_urb(urb, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) "%s - usb_submit_urb failed with result %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) __func__, retval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) } /* mct_u232_read_int_callback */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) static void mct_u232_set_termios(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) struct usb_serial_port *port,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) struct ktermios *old_termios)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) struct usb_serial *serial = port->serial;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) struct ktermios *termios = &tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) unsigned int cflag = termios->c_cflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) unsigned int old_cflag = old_termios->c_cflag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) unsigned char last_lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) /* get a local copy of the current port settings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) last_lcr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) * Update baud rate.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) * Do not attempt to cache old rates and skip settings,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) * disconnects screw such tricks up completely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) * Premature optimization is the root of all evil.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) /* reassert DTR and RTS on transition from B0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if ((old_cflag & CBAUD) == B0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) dev_dbg(&port->dev, "%s: baud was B0\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) control_state |= TIOCM_DTR | TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) if ((cflag & CBAUD) == B0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) dev_dbg(&port->dev, "%s: baud is B0\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) /* Drop RTS and DTR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) control_state &= ~(TIOCM_DTR | TIOCM_RTS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) * Update line control register (LCR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) /* set the parity */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (cflag & PARENB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) last_lcr |= (cflag & PARODD) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) last_lcr |= MCT_U232_PARITY_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) /* set the number of data bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) switch (cflag & CSIZE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) case CS5:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) last_lcr |= MCT_U232_DATA_BITS_5; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) case CS6:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) last_lcr |= MCT_U232_DATA_BITS_6; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) case CS7:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) last_lcr |= MCT_U232_DATA_BITS_7; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) case CS8:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) last_lcr |= MCT_U232_DATA_BITS_8; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) dev_err(&port->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) "CSIZE was not CS5-CS8, using default of 8\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) last_lcr |= MCT_U232_DATA_BITS_8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) termios->c_cflag &= ~CMSPAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) /* set the number of stop bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) last_lcr |= (cflag & CSTOPB) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) mct_u232_set_line_ctrl(port, last_lcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) /* save off the modified port settings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) priv->control_state = control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) priv->last_lcr = last_lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) } /* mct_u232_set_termios */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) static void mct_u232_break_ctl(struct tty_struct *tty, int break_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) unsigned char lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) lcr = priv->last_lcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) if (break_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) lcr |= MCT_U232_SET_BREAK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) mct_u232_set_line_ctrl(port, lcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) } /* mct_u232_break_ctl */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) static int mct_u232_tiocmget(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) return control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) static int mct_u232_tiocmset(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) unsigned int set, unsigned int clear)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) spin_lock_irqsave(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) if (set & TIOCM_RTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) control_state |= TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (set & TIOCM_DTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) control_state |= TIOCM_DTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) if (clear & TIOCM_RTS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) control_state &= ~TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (clear & TIOCM_DTR)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) control_state &= ~TIOCM_DTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) priv->control_state = control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) spin_unlock_irqrestore(&priv->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) return mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) static void mct_u232_throttle(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) spin_lock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) priv->rx_flags |= THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) if (C_CRTSCTS(tty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) priv->control_state &= ~TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) spin_unlock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) spin_unlock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) static void mct_u232_unthrottle(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) struct usb_serial_port *port = tty->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) struct mct_u232_private *priv = usb_get_serial_port_data(port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) unsigned int control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) spin_lock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) if ((priv->rx_flags & THROTTLED) && C_CRTSCTS(tty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) priv->rx_flags &= ~THROTTLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) priv->control_state |= TIOCM_RTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) control_state = priv->control_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) spin_unlock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) mct_u232_set_modem_ctrl(port, control_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) spin_unlock_irq(&priv->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) module_usb_serial_driver(serial_drivers, id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) MODULE_AUTHOR(DRIVER_AUTHOR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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