kernel/linux.git/drivers/usb/serial/f81232.c, branch v4.9.331

USB: serial: f81232: fix interrupt worker not stop

2019-05-10T15:52:10+00:00

commit 804dbee1e49774918339c1e5a87400988c0819e8 upstream. The F81232 will use interrupt worker to handle MSR change. This patch will fix the issue that interrupt work should stop in close() and suspend(). This also fixes line-status events being disabled after a suspend cycle until the port is re-opened. Signed-off-by: Ji-Ze Hong (Peter Hong) [ johan: amend commit message ] Fixes: 87fe5adcd8de ("USB: f81232: implement read IIR/MSR with endpoint") Cc: stable # 4.1 Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman

USB: f81232: fix some minor style issues

2015-03-27T16:36:29+00:00

Fix some really minor coding-style issues. Signed-off-by: Johan Hovold

USB: f81232: modify/add author

2015-03-27T16:29:28+00:00

Add me to co-author and fix no '>' in greg kh's email Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: cleanup non-used define

2015-03-27T16:29:28+00:00

We remove non-used define in this patch to avoid wrong usage. Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: clarify f81232_ioctl() and fix

2015-03-27T16:29:27+00:00

We extract TIOCGSERIAL section in f81232_ioctl() to f81232_get_serial_info() to make it clarify. Also we fix device type from 16654 to 16550A, and set it's baud_base to 115200 (1.8432MHz/16). Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: implement set_termios()

2015-03-27T16:29:27+00:00

The original driver had do not any h/w change in driver. This patch implements with configure H/W for baud/parity/word length/stop bits functional in f81232_set_termios(). This patch also implement DTR/RTS control when baudrate B0. We drop DTR/RTS when B0, otherwise enable it. We are checking baudrate in set_termios() too, If baudrate larger then 115200, it will be changed to 115200 and use tty_encode_baud_rate() to encode into tty Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: implement port enable/disable method

2015-03-27T16:29:27+00:00

We put FCR/IER initial step to f81232_port_enable()/f81232_port_disable(). When port is open, it set MSR interrupt on. Otherwise set it off. Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: implement MCR/MSR function

2015-03-27T16:29:26+00:00

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 Signed-off-by: Johan Hovold

USB: f81232: implement read IIR/MSR with endpoint

2015-03-27T16:29:26+00:00

The interrupt endpoint will report current IIR. If we got IIR with MSR changed , We will do read MSR with interrupt_work worker to do f81232_read_msr() function. Signed-off-by: Peter Hung Signed-off-by: Johan Hovold

USB: f81232: change lock mechanism

2015-03-27T16:29:26+00:00

The original driver lock with spin_lock_irqsave()/spin_unlock_irqrestore() because of it's maybe used in interrupt context f81232_process_read_urb(). We had remove it from previous patch "implement RX bulk-in EP", so we can change it from busying loop spin_lock to sleepable mutex_lock. Signed-off-by: Peter Hung Signed-off-by: Johan Hovold