Re: [PATCH V8 05/10] USB: f81232: implement MCR/MSR function
On Thu, Feb 26, 2015 at 06:02:11PM +0800, Peter Hung wrote:
> This patch implement relative MCR/MSR function, such like
> tiocmget()/tiocmset()/dtr_rts()/carrier_raised()
>
> original f81232_carrier_raised() compared with wrong value UART_DCD.
> It's should compared with UART_MSR_DCD.
>
> Signed-off-by: Peter Hung
> ---
> drivers/usb/serial/f81232.c | 139
> +---
> 1 file changed, 117 insertions(+), 22 deletions(-)
> +static int f81232_set_mctrl(struct usb_serial_port *port,
> +unsigned int set, unsigned int clear)
> +{
> + u8 urb_value;
Minor nit: could you just call this "val" as it's unrelated to any urb.
Also looks good otherwise.
Johan
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Re: [PATCH V8 05/10] USB: f81232: implement MCR/MSR function
On Thu, Feb 26, 2015 at 06:02:11PM +0800, Peter Hung wrote:
This patch implement relative MCR/MSR function, such like
tiocmget()/tiocmset()/dtr_rts()/carrier_raised()
original f81232_carrier_raised() compared with wrong value UART_DCD.
It's should compared with UART_MSR_DCD.
Signed-off-by: Peter Hung hpeter+linux_ker...@gmail.com
---
drivers/usb/serial/f81232.c | 139
+---
1 file changed, 117 insertions(+), 22 deletions(-)
+static int f81232_set_mctrl(struct usb_serial_port *port,
+unsigned int set, unsigned int clear)
+{
+ u8 urb_value;
Minor nit: could you just call this val as it's unrelated to any urb.
Also looks good otherwise.
Johan
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the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[PATCH V8 05/10] USB: f81232: implement MCR/MSR function
This patch implement relative MCR/MSR function, such like
tiocmget()/tiocmset()/dtr_rts()/carrier_raised()
original f81232_carrier_raised() compared with wrong value UART_DCD.
It's should compared with UART_MSR_DCD.
Signed-off-by: Peter Hung
---
drivers/usb/serial/f81232.c | 139 +---
1 file changed, 117 insertions(+), 22 deletions(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 46a81ef..b70f9b9 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -34,8 +34,10 @@ MODULE_DEVICE_TABLE(usb, id_table);
/* USB Control EP parameter */
#define F81232_REGISTER_REQUEST0xa0
#define F81232_GET_REGISTER0xc0
+#define F81232_SET_REGISTER0x40
#define SERIAL_BASE_ADDRESS0x0120
+#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
#define CONTROL_DTR0x01
@@ -54,7 +56,7 @@ MODULE_DEVICE_TABLE(usb, id_table);
struct f81232_private {
struct mutex lock;
- u8 line_control;
+ u8 modem_control;
u8 modem_status;
struct work_struct interrupt_work;
struct usb_serial_port *port;
@@ -95,6 +97,42 @@ static int f81232_get_register(struct usb_serial_port *port,
u16 reg, u8 *val)
return status;
}
+static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
+{
+ int status;
+ u8 *tmp;
+ struct usb_device *dev = port->serial->dev;
+
+ tmp = kmalloc(sizeof(val), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ *tmp = val;
+
+ status = usb_control_msg(dev,
+ usb_sndctrlpipe(dev, 0),
+ F81232_REGISTER_REQUEST,
+ F81232_SET_REGISTER,
+ reg,
+ 0,
+ tmp,
+ sizeof(u8),
+ USB_CTRL_SET_TIMEOUT);
+ if (status != sizeof(val)) {
+ dev_err(>dev, "%s failed status: %d\n", __func__, status);
+
+ if (status == 0)
+ status = -EIO;
+ else
+ status = usb_translate_errors(status);
+ } else {
+ status = 0;
+ }
+
+ kfree(tmp);
+ return status;
+}
+
static void f81232_read_msr(struct usb_serial_port *port)
{
int status;
@@ -139,6 +177,51 @@ static void f81232_read_msr(struct usb_serial_port *port)
mutex_unlock(>lock);
}
+static int f81232_set_mctrl(struct usb_serial_port *port,
+ unsigned int set, unsigned int clear)
+{
+ u8 urb_value;
+ int status;
+ struct f81232_private *priv = usb_get_serial_port_data(port);
+
+ if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0)
+ return 0; /* no change */
+
+ /* 'set' takes precedence over 'clear' */
+ clear &= ~set;
+
+ /* force enable interrupt with OUT2 */
+ mutex_lock(>lock);
+ urb_value = UART_MCR_OUT2 | priv->modem_control;
+
+ if (clear & TIOCM_DTR)
+ urb_value &= ~UART_MCR_DTR;
+
+ if (clear & TIOCM_RTS)
+ urb_value &= ~UART_MCR_RTS;
+
+ if (set & TIOCM_DTR)
+ urb_value |= UART_MCR_DTR;
+
+ if (set & TIOCM_RTS)
+ urb_value |= UART_MCR_RTS;
+
+ dev_dbg(>dev, "%s new:%02x old:%02x\n", __func__,
+ urb_value, priv->modem_control);
+
+ status = f81232_set_register(port, MODEM_CONTROL_REGISTER, urb_value);
+ if (status) {
+ dev_err(>dev, "%s set MCR status < 0\n", __func__);
+ mutex_unlock(>lock);
+ return status;
+ }
+
+ priv->modem_control = urb_value;
+ mutex_unlock(>lock);
+
+ return 0;
+}
+
static void f81232_update_line_status(struct usb_serial_port *port,
unsigned char *data,
size_t actual_length)
@@ -250,12 +333,6 @@ static void f81232_process_read_urb(struct urb *urb)
tty_flip_buffer_push(>port);
}
-static int set_control_lines(struct usb_device *dev, u8 value)
-{
- /* FIXME - Stubbed out for now */
- return 0;
-}
-
static void f81232_break_ctl(struct tty_struct *tty, int break_state)
{
/* FIXME - Stubbed out for now */
@@ -283,15 +360,35 @@ static void f81232_set_termios(struct tty_struct *tty,
static int f81232_tiocmget(struct tty_struct *tty)
{
- /* FIXME - Stubbed out for now */
- return 0;
+ int r;
+ struct usb_serial_port *port = tty->driver_data;
+ struct f81232_private *port_priv = usb_get_serial_port_data(port);
+ u8 mcr, msr;
+
+ /* force get current MSR changed state */
+ f81232_read_msr(port);
+
+
[PATCH V8 05/10] USB: f81232: implement MCR/MSR function
This patch implement relative MCR/MSR function, such like
tiocmget()/tiocmset()/dtr_rts()/carrier_raised()
original f81232_carrier_raised() compared with wrong value UART_DCD.
It's should compared with UART_MSR_DCD.
Signed-off-by: Peter Hung hpeter+linux_ker...@gmail.com
---
drivers/usb/serial/f81232.c | 139 +---
1 file changed, 117 insertions(+), 22 deletions(-)
diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c
index 46a81ef..b70f9b9 100644
--- a/drivers/usb/serial/f81232.c
+++ b/drivers/usb/serial/f81232.c
@@ -34,8 +34,10 @@ MODULE_DEVICE_TABLE(usb, id_table);
/* USB Control EP parameter */
#define F81232_REGISTER_REQUEST0xa0
#define F81232_GET_REGISTER0xc0
+#define F81232_SET_REGISTER0x40
#define SERIAL_BASE_ADDRESS0x0120
+#define MODEM_CONTROL_REGISTER (0x04 + SERIAL_BASE_ADDRESS)
#define MODEM_STATUS_REGISTER (0x06 + SERIAL_BASE_ADDRESS)
#define CONTROL_DTR0x01
@@ -54,7 +56,7 @@ MODULE_DEVICE_TABLE(usb, id_table);
struct f81232_private {
struct mutex lock;
- u8 line_control;
+ u8 modem_control;
u8 modem_status;
struct work_struct interrupt_work;
struct usb_serial_port *port;
@@ -95,6 +97,42 @@ static int f81232_get_register(struct usb_serial_port *port,
u16 reg, u8 *val)
return status;
}
+static int f81232_set_register(struct usb_serial_port *port, u16 reg, u8 val)
+{
+ int status;
+ u8 *tmp;
+ struct usb_device *dev = port-serial-dev;
+
+ tmp = kmalloc(sizeof(val), GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
+
+ *tmp = val;
+
+ status = usb_control_msg(dev,
+ usb_sndctrlpipe(dev, 0),
+ F81232_REGISTER_REQUEST,
+ F81232_SET_REGISTER,
+ reg,
+ 0,
+ tmp,
+ sizeof(u8),
+ USB_CTRL_SET_TIMEOUT);
+ if (status != sizeof(val)) {
+ dev_err(port-dev, %s failed status: %d\n, __func__, status);
+
+ if (status == 0)
+ status = -EIO;
+ else
+ status = usb_translate_errors(status);
+ } else {
+ status = 0;
+ }
+
+ kfree(tmp);
+ return status;
+}
+
static void f81232_read_msr(struct usb_serial_port *port)
{
int status;
@@ -139,6 +177,51 @@ static void f81232_read_msr(struct usb_serial_port *port)
mutex_unlock(priv-lock);
}
+static int f81232_set_mctrl(struct usb_serial_port *port,
+ unsigned int set, unsigned int clear)
+{
+ u8 urb_value;
+ int status;
+ struct f81232_private *priv = usb_get_serial_port_data(port);
+
+ if (((set | clear) (TIOCM_DTR | TIOCM_RTS)) == 0)
+ return 0; /* no change */
+
+ /* 'set' takes precedence over 'clear' */
+ clear = ~set;
+
+ /* force enable interrupt with OUT2 */
+ mutex_lock(priv-lock);
+ urb_value = UART_MCR_OUT2 | priv-modem_control;
+
+ if (clear TIOCM_DTR)
+ urb_value = ~UART_MCR_DTR;
+
+ if (clear TIOCM_RTS)
+ urb_value = ~UART_MCR_RTS;
+
+ if (set TIOCM_DTR)
+ urb_value |= UART_MCR_DTR;
+
+ if (set TIOCM_RTS)
+ urb_value |= UART_MCR_RTS;
+
+ dev_dbg(port-dev, %s new:%02x old:%02x\n, __func__,
+ urb_value, priv-modem_control);
+
+ status = f81232_set_register(port, MODEM_CONTROL_REGISTER, urb_value);
+ if (status) {
+ dev_err(port-dev, %s set MCR status 0\n, __func__);
+ mutex_unlock(priv-lock);
+ return status;
+ }
+
+ priv-modem_control = urb_value;
+ mutex_unlock(priv-lock);
+
+ return 0;
+}
+
static void f81232_update_line_status(struct usb_serial_port *port,
unsigned char *data,
size_t actual_length)
@@ -250,12 +333,6 @@ static void f81232_process_read_urb(struct urb *urb)
tty_flip_buffer_push(port-port);
}
-static int set_control_lines(struct usb_device *dev, u8 value)
-{
- /* FIXME - Stubbed out for now */
- return 0;
-}
-
static void f81232_break_ctl(struct tty_struct *tty, int break_state)
{
/* FIXME - Stubbed out for now */
@@ -283,15 +360,35 @@ static void f81232_set_termios(struct tty_struct *tty,
static int f81232_tiocmget(struct tty_struct *tty)
{
- /* FIXME - Stubbed out for now */
- return 0;
+ int r;
+ struct usb_serial_port *port = tty-driver_data;
+ struct f81232_private *port_priv = usb_get_serial_port_data(port);
+ u8 mcr, msr;
+
+ /* force get current MSR changed state */
+
