Skip to content

L
linux
Commit f4c1e8d5 authored by bart.hartgers@gmail.com's avatar bart.hartgers@gmail.com Committed by Greg Kroah-Hartman
2 Browse files
Options

USB: ark3116: Make existing functions 16450-aware and add close and release functions. 

Signed-off-by: default avatarBart Hartgers <bart.hartgers@gmail.com>
Cc: Mike McCormack <mikem@ring3k.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 149fc791
Hide whitespace changes
Inline Side-by-side
Showing with 276 additions and 219 deletions
drivers/usb/serial/ark3116.c
View file @ f4c1e8d5
......@@ -152,79 +152,105 @@ static inline void ARK3116_RCV_QUIET(struct usb_serial *serial,
buf, 0x0000001, 1000);
}
static inline int calc_divisor(int bps)
{
/* Original ark3116 made some exceptions in rounding here
* because windows did the same. Assume that is not really
* necessary.
* Crystal is 12MHz, probably because of USB, but we divide by 4?
*/
return (12000000 + 2*bps) / (4*bps);
}
static int ark3116_attach(struct usb_serial *serial)
{
char *buf;
struct usb_serial_port *port = serial->port[0];
struct ark3116_private *priv;
/* make sure we have our end-points */
if ((serial->num_bulk_in == 0) ||
(serial->num_bulk_out == 0) ||
(serial->num_interrupt_in == 0)) {
dev_err(&serial->dev->dev,
"%s - missing endpoint - "
"bulk in: %d, bulk out: %d, int in %d\n",
KBUILD_MODNAME,
serial->num_bulk_in,
serial->num_bulk_out,
serial->num_interrupt_in);
return -EINVAL;
}
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc -> out of mem?");
priv = kzalloc(sizeof(struct ark3116_private),
GFP_KERNEL);
if (!priv)
return -ENOMEM;
}
if (is_irda(serial))
dbg("IrDA mode");
init_waitqueue_head(&priv->delta_msr_wait);
mutex_init(&priv->hw_lock);
spin_lock_init(&priv->status_lock);
priv->irda = is_irda(serial);
usb_set_serial_port_data(port, priv);
/* 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, is_irda(serial) ? 0x0001 : 0x0000,
0x000B);
/* setup the hardware */
ark3116_write_reg(serial, UART_IER, 0);
/* disable DMA */
ark3116_write_reg(serial, UART_FCR, 0);
/* handshake control */
priv->hcr = 0;
ark3116_write_reg(serial, 0x8 , 0);
/* modem control */
priv->mcr = 0;
ark3116_write_reg(serial, UART_MCR, 0);
if (is_irda(serial)) {
ARK3116_SND(serial, 1001, 0xFE, 0x40, 0x0000, 0x000C);
ARK3116_SND(serial, 1002, 0xFE, 0x40, 0x0041, 0x000D);
ARK3116_SND(serial, 1003, 0xFE, 0x40, 0x0001, 0x000A);
if (!(priv->irda)) {
ark3116_write_reg(serial, 0xb , 0);
} else {
ark3116_write_reg(serial, 0xb , 1);
ark3116_write_reg(serial, 0xc , 0);
ark3116_write_reg(serial, 0xd , 0x41);
ark3116_write_reg(serial, 0xa , 1);
}
/* <-- 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);
if (is_irda(serial))
ARK3116_SND(serial, 1004, 0xFE, 0x40, 0x0000, 0x0009);
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);
/* setup baudrate */
ark3116_write_reg(serial, UART_LCR, UART_LCR_DLAB);
kfree(buf);
/* setup for 9600 8N1 */
priv->quot = calc_divisor(9600);
ark3116_write_reg(serial, UART_DLL, priv->quot & 0xff);
ark3116_write_reg(serial, UART_DLM, (priv->quot>>8) & 0xff);
priv->lcr = UART_LCR_WLEN8;
ark3116_write_reg(serial, UART_LCR, UART_LCR_WLEN8);
ark3116_write_reg(serial, 0xe, 0);
if (priv->irda)
ark3116_write_reg(serial, 0x9, 0);
dev_info(&serial->dev->dev,
"%s using %s mode\n",
KBUILD_MODNAME,
priv->irda ? "IrDA" : "RS232");
return 0;
}
static void ark3116_release(struct usb_serial *serial)
{
struct usb_serial_port *port = serial->port[0];
struct ark3116_private *priv = usb_get_serial_port_data(port);
/* device is closed, so URBs and DMA should be down */
usb_set_serial_port_data(port, NULL);
mutex_destroy(&priv->hw_lock);
kfree(priv);
}
static void ark3116_init_termios(struct tty_struct *tty)
{
struct ktermios *termios = tty->termios;
......@@ -240,200 +266,189 @@ static void ark3116_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct ark3116_private *priv = usb_get_serial_port_data(port);
struct ktermios *termios = tty->termios;
unsigned int cflag = termios->c_cflag;
int baud;
int ark3116_baud;
char *buf;
char config;
config = 0;
int bps = tty_get_baud_rate(tty);
int quot;
__u8 lcr, hcr, eval;
/* set data bit count */
switch (cflag & CSIZE) {
case CS5:
lcr = UART_LCR_WLEN5;
break;
case CS6:
lcr = UART_LCR_WLEN6;
break;
case CS7:
lcr = UART_LCR_WLEN7;
break;
default:
case CS8:
lcr = UART_LCR_WLEN8;
break;
}
if (cflag & CSTOPB)
lcr |= UART_LCR_STOP;
if (cflag & PARENB)
lcr |= UART_LCR_PARITY;
if (!(cflag & PARODD))
lcr |= UART_LCR_EPAR;
#ifdef CMSPAR
if (cflag & CMSPAR)
lcr |= UART_LCR_SPAR;
#endif
/* handshake control */
hcr = (cflag & CRTSCTS) ? 0x03 : 0x00;
/* calc baudrate */
dbg("%s - setting bps to %d", __func__, bps);
eval = 0;
switch (bps) {
case 0:
quot = calc_divisor(9600);
break;
default:
if ((bps < 75) || (bps > 3000000))
bps = 9600;
quot = calc_divisor(bps);
break;
case 460800:
eval = 1;
quot = calc_divisor(bps);
break;
case 921600:
eval = 2;
quot = calc_divisor(bps);
break;
}
dbg("%s - port %d", __func__, port->number);
/* Update state: synchronize */
mutex_lock(&priv->hw_lock);
/* keep old LCR_SBC bit */
lcr |= (priv->lcr & UART_LCR_SBC);
cflag = termios->c_cflag;
termios->c_cflag &= ~(CMSPAR|CRTSCTS);
dbg("%s - setting hcr:0x%02x,lcr:0x%02x,quot:%d",
__func__, hcr, lcr, quot);
buf = kmalloc(1, GFP_KERNEL);
if (!buf) {
dbg("error kmalloc");
*termios = *old_termios;
return;
/* handshake control */
if (priv->hcr != hcr) {
priv->hcr = hcr;
ark3116_write_reg(serial, 0x8, hcr);
}
/* 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:
dbg("CSIZE was set but not CS5-CS8, using CS8!");
/* fall through */
case CS8:
config |= 0x03;
dbg("setting CS8");
break;
}
/* baudrate */
if (priv->quot != quot) {
priv->quot = quot;
priv->lcr = lcr; /* need to write lcr anyway */
/* disable DMA since transmit/receive is
* shadowed by UART_DLL
*/
ark3116_write_reg(serial, UART_FCR, 0);
ark3116_write_reg(serial, UART_LCR,
lcr|UART_LCR_DLAB);
ark3116_write_reg(serial, UART_DLL, quot & 0xff);
ark3116_write_reg(serial, UART_DLM, (quot>>8) & 0xff);
/* restore lcr */
ark3116_write_reg(serial, UART_LCR, lcr);
/* magic baudrate thingy: not sure what it does,
* but windows does this as well.
*/
ark3116_write_reg(serial, 0xe, eval);
/* enable DMA */
ark3116_write_reg(serial, UART_FCR, UART_FCR_DMA_SELECT);
} else if (priv->lcr != lcr) {
priv->lcr = lcr;
ark3116_write_reg(serial, UART_LCR, lcr);
}
/* 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");
}
mutex_unlock(&priv->hw_lock);
/* set stop bit (1/2) */
if (cflag & CSTOPB) {
config |= 0x04;
dbg("setting 2 stop bits");
} else {
dbg("setting 1 stop bit");
/* check for software flow control */
if (I_IXOFF(tty) || I_IXON(tty)) {
dev_warn(&serial->dev->dev,
"%s: don't know how to do software flow control\n",
KBUILD_MODNAME);
}
/* set baudrate */
baud = tty_get_baud_rate(tty);
switch (baud) {
case 75:
case 150:
case 300:
case 600:
case 1200:
case 1800:
case 2400:
case 4800:
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
case 230400:
case 460800:
/* Report the resulting rate back to the caller */
tty_encode_baud_rate(tty, baud, baud);
break;
/* set 9600 as default (if given baudrate is invalid for example) */
default:
tty_encode_baud_rate(tty, 9600, 9600);
case 0:
baud = 9600;
}
/*
* found by try'n'error, be careful, maybe there are other options
* for multiplicator etc! (3.5 for example)
*/
if (baud == 460800)
/* strange, for 460800 the formula is wrong
* if using 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);
/* Don't rewrite B0 */
if (tty_termios_baud_rate(termios))
tty_termios_encode_baud_rate(termios, bps, bps);
}
if (cflag & CRTSCTS)
dbg("CRTSCTS not supported by chipset?!");
static void ark3116_close(struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
/* TEST ARK3116_SND(154, 0xFE, 0x40, 0xFFFF, 0x0006); */
if (serial->dev) {
/* disable DMA */
ark3116_write_reg(serial, UART_FCR, 0);
kfree(buf);
/* deactivate interrupts */
ark3116_write_reg(serial, UART_IER, 0);
return;
/* shutdown any bulk reads that might be going on */
if (serial->num_bulk_out)
usb_kill_urb(port->write_urb);
if (serial->num_bulk_in)
usb_kill_urb(port->read_urb);
if (serial->num_interrupt_in)
usb_kill_urb(port->interrupt_in_urb);
}
}
static int ark3116_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct ktermios tmp_termios;
struct ark3116_private *priv = usb_get_serial_port_data(port);
struct usb_serial *serial = port->serial;
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);
/* setup termios */
if (tty)
ark3116_set_termios(tty, port, NULL);
ARK3116_SND(serial, 121, 0xFE, 0x40, 0x0001, 0x0004);
/* remove any data still left: also clears error state */
ark3116_read_reg(serial, UART_RX, buf);
ARK3116_RCV(serial, 122, 0xFE, 0xC0, 0x0000, 0x0004, 0x01, 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);
ARK3116_SND(serial, 123, 0xFE, 0x40, 0x0003, 0x0004);
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;
}
/* returns different values (control lines?!) */
ARK3116_RCV(serial, 124, 0xFE, 0xC0, 0x0000, 0x0006, 0xFF, buf);
/* activate interrupts */
ark3116_write_reg(port->serial, UART_IER, UART_IER_MSI|UART_IER_RLSI);
/* initialise termios */
if (tty)
ark3116_set_termios(tty, port, &tmp_termios);
/* 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)
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment
GitLab Nexedi Edition | About GitLab | About Nexedi | 沪ICP备2021021310号-2 | 沪ICP备2021021310号-7