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USB: ark3116: Make existing functions 16450-aware and add close and release functions.
Signed-off-by: Bart Hartgers <bart.hartgers@gmail.com> Cc: Mike McCormack <mikem@ring3k.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
bart.hartgers@gmail.com
Greg Kroah-Hartman
parent
149fc791a4
commit
f4c1e8d597
@ -152,79 +152,105 @@ static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
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buf, 0x0000001, 1000);
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}
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static inline int calc_divisor(int bps)
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{
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/* Original ark3116 made some exceptions in rounding here
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* because windows did the same. Assume that is not really
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* necessary.
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* Crystal is 12MHz, probably because of USB, but we divide by 4?
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*/
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return (12000000 + 2*bps) / (4*bps);
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}
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static int ark3116_attach(struct usb_serial *serial)
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{
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char *buf;
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struct usb_serial_port *port = serial->port[0];
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struct ark3116_private *priv;
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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dbg("error kmalloc -> out of mem?");
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/* make sure we have our end-points */
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if ((serial->num_bulk_in == 0) ||
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(serial->num_bulk_out == 0) ||
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(serial->num_interrupt_in == 0)) {
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dev_err(&serial->dev->dev,
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"%s - missing endpoint - "
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"bulk in: %d, bulk out: %d, int in %d\n",
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KBUILD_MODNAME,
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serial->num_bulk_in,
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serial->num_bulk_out,
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serial->num_interrupt_in);
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return -EINVAL;
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}
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priv = kzalloc(sizeof(struct ark3116_private),
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GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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init_waitqueue_head(&priv->delta_msr_wait);
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mutex_init(&priv->hw_lock);
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spin_lock_init(&priv->status_lock);
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priv->irda = is_irda(serial);
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usb_set_serial_port_data(port, priv);
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/* setup the hardware */
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ark3116_write_reg(serial, UART_IER, 0);
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/* disable DMA */
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ark3116_write_reg(serial, UART_FCR, 0);
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/* handshake control */
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priv->hcr = 0;
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ark3116_write_reg(serial, 0x8 , 0);
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/* modem control */
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priv->mcr = 0;
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ark3116_write_reg(serial, UART_MCR, 0);
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if (!(priv->irda)) {
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ark3116_write_reg(serial, 0xb , 0);
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} else {
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ark3116_write_reg(serial, 0xb , 1);
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ark3116_write_reg(serial, 0xc , 0);
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ark3116_write_reg(serial, 0xd , 0x41);
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ark3116_write_reg(serial, 0xa , 1);
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}
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if (is_irda(serial))
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dbg("IrDA mode");
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/* setup baudrate */
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ark3116_write_reg(serial, UART_LCR, UART_LCR_DLAB);
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/* 3 */
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ARK3116_SND(serial, 3, 0xFE, 0x40, 0x0008, 0x0002);
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ARK3116_SND(serial, 4, 0xFE, 0x40, 0x0008, 0x0001);
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ARK3116_SND(serial, 5, 0xFE, 0x40, 0x0000, 0x0008);
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ARK3116_SND(serial, 6, 0xFE, 0x40, is_irda(serial) ? 0x0001 : 0x0000,
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0x000B);
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/* setup for 9600 8N1 */
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priv->quot = calc_divisor(9600);
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ark3116_write_reg(serial, UART_DLL, priv->quot & 0xff);
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ark3116_write_reg(serial, UART_DLM, (priv->quot>>8) & 0xff);
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if (is_irda(serial)) {
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ARK3116_SND(serial, 1001, 0xFE, 0x40, 0x0000, 0x000C);
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ARK3116_SND(serial, 1002, 0xFE, 0x40, 0x0041, 0x000D);
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ARK3116_SND(serial, 1003, 0xFE, 0x40, 0x0001, 0x000A);
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}
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priv->lcr = UART_LCR_WLEN8;
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ark3116_write_reg(serial, UART_LCR, UART_LCR_WLEN8);
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/* <-- seq7 */
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ARK3116_RCV(serial, 7, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
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ARK3116_SND(serial, 8, 0xFE, 0x40, 0x0080, 0x0003);
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ARK3116_SND(serial, 9, 0xFE, 0x40, 0x001A, 0x0000);
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ARK3116_SND(serial, 10, 0xFE, 0x40, 0x0000, 0x0001);
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ARK3116_SND(serial, 11, 0xFE, 0x40, 0x0000, 0x0003);
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ark3116_write_reg(serial, 0xe, 0);
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/* <-- seq12 */
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ARK3116_RCV(serial, 12, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
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ARK3116_SND(serial, 13, 0xFE, 0x40, 0x0000, 0x0004);
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if (priv->irda)
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ark3116_write_reg(serial, 0x9, 0);
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/* 14 */
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ARK3116_RCV(serial, 14, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
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ARK3116_SND(serial, 15, 0xFE, 0x40, 0x0000, 0x0004);
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/* 16 */
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ARK3116_RCV(serial, 16, 0xFE, 0xC0, 0x0000, 0x0004, 0x00, buf);
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/* --> seq17 */
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ARK3116_SND(serial, 17, 0xFE, 0x40, 0x0001, 0x0004);
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/* <-- seq18 */
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ARK3116_RCV(serial, 18, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, buf);
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/* --> seq19 */
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ARK3116_SND(serial, 19, 0xFE, 0x40, 0x0003, 0x0004);
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/* <-- seq20 */
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/* seems like serial port status info (RTS, CTS, ...) */
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/* returns modem control line status?! */
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ARK3116_RCV(serial, 20, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
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/* set 9600 baud & do some init?! */
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ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
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ARK3116_SND(serial, 148, 0xFE, 0x40, 0x0038, 0x0000);
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ARK3116_SND(serial, 149, 0xFE, 0x40, 0x0001, 0x0001);
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if (is_irda(serial))
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ARK3116_SND(serial, 1004, 0xFE, 0x40, 0x0000, 0x0009);
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ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
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ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
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ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
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ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
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ARK3116_SND(serial, 154, 0xFE, 0x40, 0x0003, 0x0003);
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kfree(buf);
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dev_info(&serial->dev->dev,
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"%s using %s mode\n",
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KBUILD_MODNAME,
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priv->irda ? "IrDA" : "RS232");
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return 0;
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}
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static void ark3116_release(struct usb_serial *serial)
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{
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struct usb_serial_port *port = serial->port[0];
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struct ark3116_private *priv = usb_get_serial_port_data(port);
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/* device is closed, so URBs and DMA should be down */
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usb_set_serial_port_data(port, NULL);
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mutex_destroy(&priv->hw_lock);
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kfree(priv);
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}
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static void ark3116_init_termios(struct tty_struct *tty)
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{
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struct ktermios *termios = tty->termios;
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@ -240,200 +266,189 @@ static void ark3116_set_termios(struct tty_struct *tty,
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struct ktermios *old_termios)
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{
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struct usb_serial *serial = port->serial;
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struct ark3116_private *priv = usb_get_serial_port_data(port);
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struct ktermios *termios = tty->termios;
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unsigned int cflag = termios->c_cflag;
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int baud;
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int ark3116_baud;
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char *buf;
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char config;
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int bps = tty_get_baud_rate(tty);
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int quot;
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__u8 lcr, hcr, eval;
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config = 0;
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dbg("%s - port %d", __func__, port->number);
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cflag = termios->c_cflag;
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termios->c_cflag &= ~(CMSPAR|CRTSCTS);
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buf = kmalloc(1, GFP_KERNEL);
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if (!buf) {
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dbg("error kmalloc");
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*termios = *old_termios;
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return;
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}
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/* set data bit count (8/7/6/5) */
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if (cflag & CSIZE) {
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switch (cflag & CSIZE) {
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case CS5:
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config |= 0x00;
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dbg("setting CS5");
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break;
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case CS6:
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config |= 0x01;
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dbg("setting CS6");
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break;
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case CS7:
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config |= 0x02;
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dbg("setting CS7");
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break;
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default:
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dbg("CSIZE was set but not CS5-CS8, using CS8!");
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/* fall through */
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case CS8:
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config |= 0x03;
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dbg("setting CS8");
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break;
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}
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}
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/* set parity (NONE/EVEN/ODD) */
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if (cflag & PARENB) {
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if (cflag & PARODD) {
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config |= 0x08;
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dbg("setting parity to ODD");
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} else {
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config |= 0x18;
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dbg("setting parity to EVEN");
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}
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} else {
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dbg("setting parity to NONE");
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}
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/* set stop bit (1/2) */
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if (cflag & CSTOPB) {
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config |= 0x04;
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dbg("setting 2 stop bits");
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} else {
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dbg("setting 1 stop bit");
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}
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/* set baudrate */
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baud = tty_get_baud_rate(tty);
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switch (baud) {
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case 75:
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case 150:
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case 300:
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case 600:
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case 1200:
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case 1800:
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case 2400:
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case 4800:
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case 9600:
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case 19200:
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case 38400:
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case 57600:
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case 115200:
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case 230400:
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case 460800:
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/* Report the resulting rate back to the caller */
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tty_encode_baud_rate(tty, baud, baud);
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/* set data bit count */
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switch (cflag & CSIZE) {
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case CS5:
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lcr = UART_LCR_WLEN5;
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break;
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case CS6:
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lcr = UART_LCR_WLEN6;
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break;
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case CS7:
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lcr = UART_LCR_WLEN7;
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break;
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/* set 9600 as default (if given baudrate is invalid for example) */
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default:
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tty_encode_baud_rate(tty, 9600, 9600);
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case CS8:
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lcr = UART_LCR_WLEN8;
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break;
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}
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if (cflag & CSTOPB)
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lcr |= UART_LCR_STOP;
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if (cflag & PARENB)
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lcr |= UART_LCR_PARITY;
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if (!(cflag & PARODD))
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lcr |= UART_LCR_EPAR;
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#ifdef CMSPAR
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if (cflag & CMSPAR)
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lcr |= UART_LCR_SPAR;
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#endif
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/* handshake control */
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hcr = (cflag & CRTSCTS) ? 0x03 : 0x00;
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/* calc baudrate */
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dbg("%s - setting bps to %d", __func__, bps);
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eval = 0;
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switch (bps) {
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case 0:
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baud = 9600;
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quot = calc_divisor(9600);
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break;
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default:
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if ((bps < 75) || (bps > 3000000))
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bps = 9600;
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quot = calc_divisor(bps);
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break;
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case 460800:
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eval = 1;
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quot = calc_divisor(bps);
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break;
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case 921600:
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eval = 2;
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quot = calc_divisor(bps);
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break;
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}
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/*
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* found by try'n'error, be careful, maybe there are other options
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* for multiplicator etc! (3.5 for example)
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*/
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if (baud == 460800)
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/* strange, for 460800 the formula is wrong
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* if using round() then 9600baud is wrong) */
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ark3116_baud = 7;
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else
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ark3116_baud = 3000000 / baud;
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/* Update state: synchronize */
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mutex_lock(&priv->hw_lock);
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/* ? */
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ARK3116_RCV(serial, 0, 0xFE, 0xC0, 0x0000, 0x0003, 0x03, buf);
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/* keep old LCR_SBC bit */
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lcr |= (priv->lcr & UART_LCR_SBC);
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/* offset = buf[0]; */
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/* offset = 0x03; */
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/* dbg("using 0x%04X as target for 0x0003:", 0x0080 + offset); */
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dbg("%s - setting hcr:0x%02x,lcr:0x%02x,quot:%d",
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__func__, hcr, lcr, quot);
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/* set baudrate */
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dbg("setting baudrate to %d (->reg=%d)", baud, ark3116_baud);
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ARK3116_SND(serial, 147, 0xFE, 0x40, 0x0083, 0x0003);
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ARK3116_SND(serial, 148, 0xFE, 0x40,
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(ark3116_baud & 0x00FF), 0x0000);
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ARK3116_SND(serial, 149, 0xFE, 0x40,
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(ark3116_baud & 0xFF00) >> 8, 0x0001);
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ARK3116_SND(serial, 150, 0xFE, 0x40, 0x0003, 0x0003);
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/* handshake control */
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if (priv->hcr != hcr) {
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priv->hcr = hcr;
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ark3116_write_reg(serial, 0x8, hcr);
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}
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/* ? */
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ARK3116_RCV(serial, 151, 0xFE, 0xC0, 0x0000, 0x0004, 0x03, buf);
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ARK3116_SND(serial, 152, 0xFE, 0x40, 0x0000, 0x0003);
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/* baudrate */
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if (priv->quot != quot) {
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priv->quot = quot;
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priv->lcr = lcr; /* need to write lcr anyway */
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/* set data bit count, stop bit count & parity: */
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dbg("updating bit count, stop bit or parity (cfg=0x%02X)", config);
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ARK3116_RCV(serial, 153, 0xFE, 0xC0, 0x0000, 0x0003, 0x00, buf);
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ARK3116_SND(serial, 154, 0xFE, 0x40, config, 0x0003);
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/* disable DMA since transmit/receive is
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* shadowed by UART_DLL
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*/
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ark3116_write_reg(serial, UART_FCR, 0);
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if (cflag & CRTSCTS)
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dbg("CRTSCTS not supported by chipset?!");
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ark3116_write_reg(serial, UART_LCR,
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lcr|UART_LCR_DLAB);
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ark3116_write_reg(serial, UART_DLL, quot & 0xff);
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ark3116_write_reg(serial, UART_DLM, (quot>>8) & 0xff);
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/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
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/* restore lcr */
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ark3116_write_reg(serial, UART_LCR, lcr);
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/* magic baudrate thingy: not sure what it does,
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* but windows does this as well.
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*/
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ark3116_write_reg(serial, 0xe, eval);
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kfree(buf);
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/* enable DMA */
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ark3116_write_reg(serial, UART_FCR, UART_FCR_DMA_SELECT);
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} else if (priv->lcr != lcr) {
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priv->lcr = lcr;
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ark3116_write_reg(serial, UART_LCR, lcr);
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}
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return;
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mutex_unlock(&priv->hw_lock);
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/* check for software flow control */
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if (I_IXOFF(tty) || I_IXON(tty)) {
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dev_warn(&serial->dev->dev,
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"%s: don't know how to do software flow control\n",
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KBUILD_MODNAME);
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}
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/* Don't rewrite B0 */
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if (tty_termios_baud_rate(termios))
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tty_termios_encode_baud_rate(termios, bps, bps);
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}
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static void ark3116_close(struct usb_serial_port *port)
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{
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struct usb_serial *serial = port->serial;
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if (serial->dev) {
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/* disable DMA */
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ark3116_write_reg(serial, UART_FCR, 0);
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/* deactivate interrupts */
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ark3116_write_reg(serial, UART_IER, 0);
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/* shutdown any bulk reads that might be going on */
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if (serial->num_bulk_out)
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usb_kill_urb(port->write_urb);
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if (serial->num_bulk_in)
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usb_kill_urb(port->read_urb);
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if (serial->num_interrupt_in)
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usb_kill_urb(port->interrupt_in_urb);
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}
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}
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static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
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{
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struct ktermios tmp_termios;
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struct ark3116_private *priv = usb_get_serial_port_data(port);
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struct usb_serial *serial = port->serial;
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char *buf;
|
||||
int result = 0;
|
||||
|
||||
dbg("%s - port %d", __func__, port->number);
|
||||
unsigned char *buf;
|
||||
int result;
|
||||
|
||||
buf = kmalloc(1, GFP_KERNEL);
|
||||
if (!buf) {
|
||||
dbg("error kmalloc -> out of mem?");
|
||||
if (buf == NULL)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
result = usb_serial_generic_open(tty, port);
|
||||
if (result)
|
||||
if (result) {
|
||||
dbg("%s - usb_serial_generic_open failed: %d",
|
||||
__func__, result);
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
/* 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 */
|
||||
/* setup termios */
|
||||
if (tty)
|
||||
ark3116_set_termios(tty, port, &tmp_termios);
|
||||
ark3116_set_termios(tty, port, NULL);
|
||||
|
||||
/* remove any data still left: also clears error state */
|
||||
ark3116_read_reg(serial, UART_RX, buf);
|
||||
|
||||
/* read modem status */
|
||||
priv->msr = ark3116_read_reg(serial, UART_MSR, buf);
|
||||
/* read line status */
|
||||
priv->lsr = ark3116_read_reg(serial, UART_LSR, buf);
|
||||
|
||||
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
||||
if (result) {
|
||||
dev_err(&port->dev, "submit irq_in urb failed %d\n",
|
||||
result);
|
||||
ark3116_close(port);
|
||||
goto err_out;
|
||||
}
|
||||
|
||||
/* activate interrupts */
|
||||
ark3116_write_reg(port->serial, UART_IER, UART_IER_MSI|UART_IER_RLSI);
|
||||
|
||||
/* enable DMA */
|
||||
ark3116_write_reg(port->serial, UART_FCR, UART_FCR_DMA_SELECT);
|
||||
|
||||
err_out:
|
||||
kfree(buf);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
@ -441,6 +456,7 @@ static int ark3116_ioctl(struct tty_struct *tty, struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct usb_serial_port *port = tty->driver_data;
|
||||
struct ark3116_private *priv = usb_get_serial_port_data(port);
|
||||
struct serial_struct serstruct;
|
||||
void __user *user_arg = (void __user *)arg;
|
||||
|
||||
@ -462,9 +478,48 @@ static int ark3116_ioctl(struct tty_struct *tty, struct file *file,
|
||||
if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
default:
|
||||
dbg("%s cmd 0x%04x not supported", __func__, cmd);
|
||||
case TIOCMIWAIT:
|
||||
for (;;) {
|
||||
struct async_icount prev = priv->icount;
|
||||
interruptible_sleep_on(&priv->delta_msr_wait);
|
||||
/* see if a signal did it */
|
||||
if (signal_pending(current))
|
||||
return -ERESTARTSYS;
|
||||
if ((prev.rng == priv->icount.rng) &&
|
||||
(prev.dsr == priv->icount.dsr) &&
|
||||
(prev.dcd == priv->icount.dcd) &&
|
||||
(prev.cts == priv->icount.cts))
|
||||
return -EIO;
|
||||
if ((arg & TIOCM_RNG &&
|
||||
(prev.rng != priv->icount.rng)) ||
|
||||
(arg & TIOCM_DSR &&
|
||||
(prev.dsr != priv->icount.dsr)) ||
|
||||
(arg & TIOCM_CD &&
|
||||
(prev.dcd != priv->icount.dcd)) ||
|
||||
(arg & TIOCM_CTS &&
|
||||
(prev.cts != priv->icount.cts)))
|
||||
return 0;
|
||||
}
|
||||
break;
|
||||
case TIOCGICOUNT: {
|
||||
struct serial_icounter_struct icount;
|
||||
struct async_icount cnow = priv->icount;
|
||||
memset(&icount, 0, sizeof(icount));
|
||||
icount.cts = cnow.cts;
|
||||
icount.dsr = cnow.dsr;
|
||||
icount.rng = cnow.rng;
|
||||
icount.dcd = cnow.dcd;
|
||||
icount.rx = cnow.rx;
|
||||
icount.tx = cnow.tx;
|
||||
icount.frame = cnow.frame;
|
||||
icount.overrun = cnow.overrun;
|
||||
icount.parity = cnow.parity;
|
||||
icount.brk = cnow.brk;
|
||||
icount.buf_overrun = cnow.buf_overrun;
|
||||
if (copy_to_user(user_arg, &icount, sizeof(icount)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
return -ENOIOCTLCMD;
|
||||
@ -518,11 +573,13 @@ static struct usb_serial_driver ark3116_device = {
|
||||
.usb_driver = &ark3116_driver,
|
||||
.num_ports = 1,
|
||||
.attach = ark3116_attach,
|
||||
.release = ark3116_release,
|
||||
.set_termios = ark3116_set_termios,
|
||||
.init_termios = ark3116_init_termios,
|
||||
.ioctl = ark3116_ioctl,
|
||||
.tiocmget = ark3116_tiocmget,
|
||||
.open = ark3116_open,
|
||||
.close = ark3116_close,
|
||||
};
|
||||
|
||||
static int __init ark3116_init(void)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user