--- /dev/null
+/*
+ * ark3116
+ * - implements a driver for the arkmicro ark3116 chipset (vendor=0x6547,
+ * productid=0x0232) (used in a datacable called KQ-U8A)
+ *
+ * - based on code by krisfx -> thanks !!
+ * (see http://www.linuxquestions.org/questions/showthread.php?p=2184457#post2184457)
+ *
+ * - based on logs created by usbsnoopy
+ *
+ * Author : Simon Schulz [ark3116_driver<AT>auctionant.de]
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/tty.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include "usb-serial.h"
+
+
+static int debug;
+
+static struct usb_device_id id_table [] = {
+ { USB_DEVICE(0x6547, 0x0232) },
+ { },
+};
+MODULE_DEVICE_TABLE(usb, id_table);
+
+struct ark3116_private {
+ spinlock_t lock;
+ u8 termios_initialized;
+};
+
+static inline void ARK3116_SND(struct usb_serial *serial, int seq,
+ __u8 request, __u8 requesttype,
+ __u16 value, __u16 index)
+{
+ int result;
+ result = usb_control_msg(serial->dev,
+ usb_sndctrlpipe(serial->dev,0),
+ request, requesttype, value, index,
+ NULL,0x00, 1000);
+ dbg("%03d > ok",seq);
+}
+
+static inline void ARK3116_RCV(struct usb_serial *serial, int seq,
+ __u8 request, __u8 requesttype,
+ __u16 value, __u16 index, __u8 expected,
+ char *buf)
+{
+ int result;
+ result = usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev,0),
+ request, requesttype, value, index,
+ buf, 0x0000001, 1000);
+ if (result)
+ dbg("%03d < %d bytes [0x%02X]",seq, result, buf[0]);
+ else
+ dbg("%03d < 0 bytes", seq);
+}
+
+
+static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
+ __u8 request, __u8 requesttype,
+ __u16 value, __u16 index, char *buf)
+{
+ usb_control_msg(serial->dev,
+ usb_rcvctrlpipe(serial->dev,0),
+ request, requesttype, value, index,
+ buf, 0x0000001, 1000);
+}
+
+
+static int ark3116_attach(struct usb_serial *serial)
+{
+ char *buf;
+ struct ark3116_private *priv;
+ int i;
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ priv = kmalloc (sizeof (struct ark3116_private), GFP_KERNEL);
+ if (!priv)
+ goto cleanup;
+ memset (priv, 0x00, sizeof (struct ark3116_private));
+ spin_lock_init(&priv->lock);
+
+ usb_set_serial_port_data(serial->port[i], priv);
+ }
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf) {
+ dbg("error kmalloc -> out of mem ?");
+ goto cleanup;
+ }
+
+ /* 3 */
+ ARK3116_SND(serial, 3,0xFE,0x40,0x0008,0x0002);
+ ARK3116_SND(serial, 4,0xFE,0x40,0x0008,0x0001);
+ ARK3116_SND(serial, 5,0xFE,0x40,0x0000,0x0008);
+ ARK3116_SND(serial, 6,0xFE,0x40,0x0000,0x000B);
+
+ /* <-- seq7 */
+ ARK3116_RCV(serial, 7,0xFE,0xC0,0x0000,0x0003, 0x00, buf);
+ ARK3116_SND(serial, 8,0xFE,0x40,0x0080,0x0003);
+ ARK3116_SND(serial, 9,0xFE,0x40,0x001A,0x0000);
+ ARK3116_SND(serial,10,0xFE,0x40,0x0000,0x0001);
+ ARK3116_SND(serial,11,0xFE,0x40,0x0000,0x0003);
+
+ /* <-- seq12 */
+ ARK3116_RCV(serial,12,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
+ ARK3116_SND(serial,13,0xFE,0x40,0x0000,0x0004);
+
+ /* 14 */
+ ARK3116_RCV(serial,14,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
+ ARK3116_SND(serial,15,0xFE,0x40,0x0000,0x0004);
+
+ /* 16 */
+ ARK3116_RCV(serial,16,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
+ /* --> seq17 */
+ ARK3116_SND(serial,17,0xFE,0x40,0x0001,0x0004);
+
+ /* <-- seq18 */
+ ARK3116_RCV(serial,18,0xFE,0xC0,0x0000,0x0004, 0x01, buf);
+
+ /* --> seq19 */
+ ARK3116_SND(serial,19,0xFE,0x40,0x0003,0x0004);
+
+
+ /* <-- seq20 */
+ /* seems like serial port status info (RTS, CTS,...) */
+ /* returns modem control line status ?! */
+ ARK3116_RCV(serial,20,0xFE,0xC0,0x0000,0x0006, 0xFF, buf);
+
+ /* set 9600 baud & do some init ?! */
+ ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
+ ARK3116_SND(serial,148,0xFE,0x40,0x0038,0x0000);
+ ARK3116_SND(serial,149,0xFE,0x40,0x0001,0x0001);
+ ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);
+ ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
+ ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);
+ ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
+ ARK3116_SND(serial,154,0xFE,0x40,0x0003,0x0003);
+
+ kfree(buf);
+ return(0);
+
+cleanup:
+ for (--i; i>=0; --i)
+ usb_set_serial_port_data(serial->port[i], NULL);
+ return -ENOMEM;
+}
+
+static void ark3116_set_termios(struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ struct usb_serial *serial = port->serial;
+ struct ark3116_private *priv = usb_get_serial_port_data(port);
+ unsigned int cflag = port->tty->termios->c_cflag;
+ unsigned long flags;
+ int baud;
+ int ark3116_baud;
+ char *buf;
+ char config;
+
+ config = 0;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if ((!port->tty) || (!port->tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+
+ spin_lock_irqsave(&priv->lock, flags);
+ if (!priv->termios_initialized) {
+ *(port->tty->termios) = tty_std_termios;
+ port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ priv->termios_initialized = 1;
+ }
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ cflag = port->tty->termios->c_cflag;
+
+ /* check that they really want us to change something: */
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(port->tty->termios->c_iflag) ==
+ RELEVANT_IFLAG(old_termios->c_iflag))) {
+ dbg("%s - nothing to change...", __FUNCTION__);
+ return;
+ }
+ }
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf) {
+ dbg("error kmalloc");
+ return;
+ }
+
+ /* set data bit count (8/7/6/5) */
+ if (cflag & CSIZE){
+ switch (cflag & CSIZE){
+ case CS5:
+ config |= 0x00;
+ dbg("setting CS5");
+ break;
+ case CS6:
+ config |= 0x01;
+ dbg("setting CS6");
+ break;
+ case CS7:
+ config |= 0x02;
+ dbg("setting CS7");
+ break;
+ default:
+ err ("CSIZE was set but not CS5-CS8, using CS8!");
+ case CS8:
+ config |= 0x03;
+ dbg("setting CS8");
+ break;
+ }
+ }
+
+ /* set parity (NONE,EVEN,ODD) */
+ if (cflag & PARENB){
+ if (cflag & PARODD) {
+ config |= 0x08;
+ dbg("setting parity to ODD");
+ } else {
+ config |= 0x18;
+ dbg("setting parity to EVEN");
+ }
+ } else {
+ dbg("setting parity to NONE");
+ }
+
+ /* SET STOPBIT (1/2) */
+ if (cflag & CSTOPB) {
+ config |= 0x04;
+ dbg ("setting 2 stop bits");
+ } else {
+ dbg ("setting 1 stop bit");
+ }
+
+
+ /* set baudrate: */
+ baud = 0;
+ switch (cflag & CBAUD){
+ case B0:
+ err("can't set 0baud, using 9600 instead");
+ break;
+ case B75: baud = 75; break;
+ case B150: baud = 150; break;
+ case B300: baud = 300; break;
+ case B600: baud = 600; break;
+ case B1200: baud = 1200; break;
+ case B1800: baud = 1800; break;
+ case B2400: baud = 2400; break;
+ case B4800: baud = 4800; break;
+ case B9600: baud = 9600; break;
+ case B19200: baud = 19200; break;
+ case B38400: baud = 38400; break;
+ case B57600: baud = 57600; break;
+ case B115200: baud = 115200; break;
+ case B230400: baud = 230400; break;
+ case B460800: baud = 460800; break;
+ default:
+ dbg("does not support the baudrate requested (fix it)");
+ break;
+ }
+
+ /* set 9600 as default (if given baudrate is invalid for example) */
+ if (baud == 0)
+ baud = 9600;
+
+ /*
+ * found by try'n'error, be careful, maybe there are other options
+ * for multiplicator etc!
+ */
+ if (baud == 460800)
+ /* strange, for 460800 the formula is wrong
+ * (dont use round(), then 9600baud is wrong) */
+ ark3116_baud = 7;
+ else
+ ark3116_baud = 3000000 / baud;
+
+ /* ? */
+ ARK3116_RCV(serial,0,0xFE,0xC0,0x0000,0x0003, 0x03, buf);
+ /* offset = buf[0]; */
+ /* offset = 0x03; */
+ /* dbg("using 0x%04X as target for 0x0003:",0x0080+offset); */
+
+
+ /* set baudrate */
+ dbg("setting baudrate to %d (->reg=%d)",baud,ark3116_baud);
+ ARK3116_SND(serial,147,0xFE,0x40,0x0083,0x0003);
+ ARK3116_SND(serial,148,0xFE,0x40,(ark3116_baud & 0x00FF) ,0x0000);
+ ARK3116_SND(serial,149,0xFE,0x40,(ark3116_baud & 0xFF00)>>8,0x0001);
+ ARK3116_SND(serial,150,0xFE,0x40,0x0003,0x0003);
+
+ /* ? */
+ ARK3116_RCV(serial,151,0xFE,0xC0,0x0000,0x0004,0x03, buf);
+ ARK3116_SND(serial,152,0xFE,0x40,0x0000,0x0003);
+
+ /* set data bit count, stop bit count & parity: */
+ dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
+ ARK3116_RCV(serial,153,0xFE,0xC0,0x0000,0x0003,0x00, buf);
+ ARK3116_SND(serial,154,0xFE,0x40,config,0x0003);
+
+ if (cflag & CRTSCTS)
+ dbg("CRTSCTS not supported by chipset ?!");
+
+ /* TEST ARK3116_SND(154,0xFE,0x40,0xFFFF, 0x0006); */
+
+ kfree(buf);
+ return;
+}
+
+static int ark3116_open(struct usb_serial_port *port, struct file *filp)
+{
+ struct termios tmp_termios;
+ struct usb_serial *serial = port->serial;
+ char *buf;
+ int result = 0;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf) {
+ dbg("error kmalloc -> out of mem ?");
+ return -ENOMEM;
+ }
+
+ result = usb_serial_generic_open(port, filp);
+ if (result)
+ return result;
+
+ /* open */
+ ARK3116_RCV(serial,111,0xFE,0xC0,0x0000,0x0003, 0x02, buf);
+
+ ARK3116_SND(serial,112,0xFE,0x40,0x0082,0x0003);
+ ARK3116_SND(serial,113,0xFE,0x40,0x001A,0x0000);
+ ARK3116_SND(serial,114,0xFE,0x40,0x0000,0x0001);
+ ARK3116_SND(serial,115,0xFE,0x40,0x0002,0x0003);
+
+ ARK3116_RCV(serial,116,0xFE,0xC0,0x0000,0x0004, 0x03, buf);
+ ARK3116_SND(serial,117,0xFE,0x40,0x0002,0x0004);
+
+ ARK3116_RCV(serial,118,0xFE,0xC0,0x0000,0x0004, 0x02, buf);
+ ARK3116_SND(serial,119,0xFE,0x40,0x0000,0x0004);
+
+ ARK3116_RCV(serial,120,0xFE,0xC0,0x0000,0x0004, 0x00, buf);
+
+ ARK3116_SND(serial,121,0xFE,0x40,0x0001,0x0004);
+
+ ARK3116_RCV(serial,122,0xFE,0xC0,0x0000,0x0004, 0x01, buf);
+
+ ARK3116_SND(serial,123,0xFE,0x40,0x0003,0x0004);
+
+ /* returns different values (control lines ?!) */
+ ARK3116_RCV(serial,124,0xFE,0xC0,0x0000,0x0006, 0xFF, buf);
+
+ /* initialise termios: */
+ if (port->tty)
+ ark3116_set_termios(port, &tmp_termios);
+
+ kfree(buf);
+
+ return result;
+
+}
+
+static int ark3116_ioctl(struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ dbg("ioctl not supported yet...");
+ return -ENOIOCTLCMD;
+}
+
+static int ark3116_tiocmget(struct usb_serial_port *port, struct file *file)
+{
+ struct usb_serial *serial = port->serial;
+ char *buf;
+ char temp;
+
+ /* seems like serial port status info (RTS, CTS,...) is stored
+ * in reg(?) 0x0006
+ * pcb connection point 11 = GND -> sets bit4 of response
+ * pcb connection point 7 = GND -> sets bit6 of response
+ */
+
+ buf = kmalloc(1, GFP_KERNEL);
+ if (!buf) {
+ dbg("error kmalloc");
+ return -ENOMEM;
+ }
+
+ /* read register: */
+ ARK3116_RCV_QUIET(serial,0xFE,0xC0,0x0000,0x0006,buf);
+ temp = buf[0];
+ kfree(buf);
+
+ /* i do not really know if bit4=CTS and bit6=DSR... was just a
+ * quick guess !!
+ */
+ return (temp & (1<<4) ? TIOCM_CTS : 0) |
+ (temp & (1<<6) ? TIOCM_DSR : 0);
+}
+
+static struct usb_driver ark3116_driver = {
+ .name = "ark3116",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = id_table,
+};
+
+static struct usb_serial_driver ark3116_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "ark3116",
+ },
+ .id_table = id_table,
+ .num_interrupt_in = 1,
+ .num_bulk_in = 1,
+ .num_bulk_out = 1,
+ .num_ports = 1,
+ .attach = ark3116_attach,
+ .set_termios = ark3116_set_termios,
+ .ioctl = ark3116_ioctl,
+ .tiocmget = ark3116_tiocmget,
+ .open = ark3116_open,
+};
+
+static int __init ark3116_init(void)
+{
+ int retval;
+
+ retval = usb_serial_register(&ark3116_device);
+ if (retval)
+ return retval;
+ retval = usb_register(&ark3116_driver);
+ if (retval)
+ usb_serial_deregister(&ark3116_device);
+ return retval;
+}
+
+static void __exit ark3116_exit(void)
+{
+ usb_deregister(&ark3116_driver);
+ usb_serial_deregister(&ark3116_device);
+}
+
+module_init(ark3116_init);
+module_exit(ark3116_exit);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
+
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff