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path: root/drivers/usb/serial/mos7720.c
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Diffstat (limited to 'drivers/usb/serial/mos7720.c')
-rw-r--r--drivers/usb/serial/mos7720.c123
1 files changed, 80 insertions, 43 deletions
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index ccd4dd340d2c..763e32a44be0 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -85,7 +85,7 @@ static int debug;
#define MOSCHIP_DEVICE_ID_7720 0x7720
#define MOSCHIP_DEVICE_ID_7715 0x7715
-static struct usb_device_id moschip_port_id_table [] = {
+static struct usb_device_id moschip_port_id_table[] = {
{ USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7720) },
{ } /* terminating entry */
};
@@ -319,8 +319,7 @@ static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
return status;
}
-static int mos7720_open(struct tty_struct *tty,
- struct usb_serial_port *port, struct file *filp)
+static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct usb_serial *serial;
struct usb_serial_port *port0;
@@ -378,10 +377,14 @@ static int mos7720_open(struct tty_struct *tty,
/* Initialize MCS7720 -- Write Init values to corresponding Registers
*
* Register Index
+ * 0 : THR/RHR
* 1 : IER
* 2 : FCR
* 3 : LCR
* 4 : MCR
+ * 5 : LSR
+ * 6 : MSR
+ * 7 : SPR
*
* 0x08 : SP1/2 Control Reg
*/
@@ -1250,20 +1253,88 @@ static void mos7720_set_termios(struct tty_struct *tty,
static int get_lsr_info(struct tty_struct *tty,
struct moschip_port *mos7720_port, unsigned int __user *value)
{
- int count;
+ struct usb_serial_port *port = tty->driver_data;
unsigned int result = 0;
+ unsigned char data = 0;
+ int port_number = port->number - port->serial->minor;
+ int count;
count = mos7720_chars_in_buffer(tty);
if (count == 0) {
- dbg("%s -- Empty", __func__);
- result = TIOCSER_TEMT;
+ send_mos_cmd(port->serial, MOS_READ, port_number,
+ UART_LSR, &data);
+ if ((data & (UART_LSR_TEMT | UART_LSR_THRE))
+ == (UART_LSR_TEMT | UART_LSR_THRE)) {
+ dbg("%s -- Empty", __func__);
+ result = TIOCSER_TEMT;
+ }
}
-
if (copy_to_user(value, &result, sizeof(int)))
return -EFAULT;
return 0;
}
+static int mos7720_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+ unsigned int result = 0;
+ unsigned int mcr ;
+ unsigned int msr ;
+
+ dbg("%s - port %d", __func__, port->number);
+
+ mcr = mos7720_port->shadowMCR;
+ msr = mos7720_port->shadowMSR;
+
+ result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
+ | ((mcr & UART_MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
+ | ((msr & UART_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
+ | ((msr & UART_MSR_DCD) ? TIOCM_CAR : 0) /* 0x040 */
+ | ((msr & UART_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
+ | ((msr & UART_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
+
+ dbg("%s -- %x", __func__, result);
+
+ return result;
+}
+
+static int mos7720_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+ unsigned int mcr ;
+ unsigned char lmcr;
+
+ dbg("%s - port %d", __func__, port->number);
+ dbg("he was at tiocmget");
+
+ mcr = mos7720_port->shadowMCR;
+
+ if (set & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (set & TIOCM_DTR)
+ mcr |= UART_MCR_DTR;
+ if (set & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+
+ if (clear & TIOCM_RTS)
+ mcr &= ~UART_MCR_RTS;
+ if (clear & TIOCM_DTR)
+ mcr &= ~UART_MCR_DTR;
+ if (clear & TIOCM_LOOP)
+ mcr &= ~UART_MCR_LOOP;
+
+ mos7720_port->shadowMCR = mcr;
+ lmcr = mos7720_port->shadowMCR;
+
+ send_mos_cmd(port->serial, MOS_WRITE,
+ port->number - port->serial->minor, UART_MCR, &lmcr);
+
+ return 0;
+}
+
static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
unsigned int __user *value)
{
@@ -1301,14 +1372,6 @@ static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
mcr &= ~UART_MCR_LOOP;
break;
- case TIOCMSET:
- /* turn off the RTS and DTR and LOOPBACK
- * and then only turn on what was asked to */
- mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
- mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
- mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
- mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
- break;
}
mos7720_port->shadowMCR = mcr;
@@ -1320,28 +1383,6 @@ static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
return 0;
}
-static int get_modem_info(struct moschip_port *mos7720_port,
- unsigned int __user *value)
-{
- unsigned int result = 0;
- unsigned int msr = mos7720_port->shadowMSR;
- unsigned int mcr = mos7720_port->shadowMCR;
-
- result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
- | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
- | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
- | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
- | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
- | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
-
-
- dbg("%s -- %x", __func__, result);
-
- if (copy_to_user(value, &result, sizeof(int)))
- return -EFAULT;
- return 0;
-}
-
static int get_serial_info(struct moschip_port *mos7720_port,
struct serial_struct __user *retinfo)
{
@@ -1392,17 +1433,11 @@ static int mos7720_ioctl(struct tty_struct *tty, struct file *file,
/* FIXME: These should be using the mode methods */
case TIOCMBIS:
case TIOCMBIC:
- case TIOCMSET:
dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET",
__func__, port->number);
return set_modem_info(mos7720_port, cmd,
(unsigned int __user *)arg);
- case TIOCMGET:
- dbg("%s (%d) TIOCMGET", __func__, port->number);
- return get_modem_info(mos7720_port,
- (unsigned int __user *)arg);
-
case TIOCGSERIAL:
dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
return get_serial_info(mos7720_port,
@@ -1557,6 +1592,8 @@ static struct usb_serial_driver moschip7720_2port_driver = {
.attach = mos7720_startup,
.release = mos7720_release,
.ioctl = mos7720_ioctl,
+ .tiocmget = mos7720_tiocmget,
+ .tiocmset = mos7720_tiocmset,
.set_termios = mos7720_set_termios,
.write = mos7720_write,
.write_room = mos7720_write_room,
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 23:12:44 +0300