[PATCH V9 00/10] usb: serial: F81232 V9 patches

[Peter Hung]

This series patch V9 is changed from V8 as following:

1. add comments for read URB 1byte LSR when port open.
2. change error handle flow of set_register()/get_register()

V8 (old change):
1. The V7 MSR strange delta value is checked with locking problem. We changed
   f81232_set_mctrl() & f81232_read_msr() lock mechanism, the old version is
   only locked with variable protection, new version will lock from start to
   end with these 2 function.   
2. f81232_set_baudrate() add error handling and no longer handle with baudrate
   B0, change to handle with f81232_set_termios()
3. When user set baudrate larger then 115200, we will change it with 115200
   and tty_encode_baud_rate() in f81232_set_termios().
4. V7 f81232_set_baudrate() divisor declared with type u8, it will make 
   baudrate set failed with smaller then B600 (115200/300=384 overflow :Q).
   We changed it with integer type for divisor larger then 256.
   
V7 (old change):

1. The buffer of usb_control_msg() in set_register()/get_register() are change
   from local variable to kmalloc(). (PATCH V7 02/11)
2. Change all set_register()/get_register() return value 0 is success, 
   otherwise are failed. ( return 0 of usb_control_msg() treat as -EIO, 
   PATCH V7 02/11)
3. tty_port_tty_get() called only when DCD has changed. (PATCH V7 05/11)  
4. remove likely()/unlikely() branch prediction.
5. Implement DTR/RTS control when baudrate B0. We drop DTR/RTS when B0, 
   otherwise enable it. (PATCH V7 08/11)
6. Change private struct line_control to modem_control with meanful. 
   (PATCH V7 06/11)
7. We confirmd MSR strange delta value is not locking-issue. The issue
   maybe reproduce with set MCR & get MSR before IIR notice with MSR changed.
   
V6 (old change):

1. transform all function not to use private data as parameter, using
   usb_serial_port instead.
2. process_read_urb() add process of Break/FrameError/ParityError/OE.
   (patch: 03/10)
3. fix calc_baud_divisor() will cause divide by zero with B0. (patch: 04/10)
4. Some init step we extract it from set_termios() to f81232_port_init()
   and run it when open port only. (patch: 04/10)
5. We'll force re-read msr in tiocmget() because the IIR with MSR change
   maybe delay received. (patch: 05/10)
6. fix MSR status bits changed but delta bits is 0 will cause read serial port
   malfunctional with update port status. (patch: 08/10)
7. Add MSR change statistic when MSR has been read. (patch: 09/10)   
8. clarify a lot of code about Johan suggested.

Peter Hung (10):
  USB: f81232: rename private struct member name
  USB: f81232: implement RX bulk-in EP
  USB: f81232: change lock mechanism
  USB: f81232: implement read IIR/MSR with endpoint
  USB: f81232: implement MCR/MSR function
  USB: f81232: implement port enable/disable method
  USB: f81232: implement set_termios()
  USB: f81232: clarify f81232_ioctl() and fix
  USB: f81232: cleanup non-used define
  USB: f81232: modify/add author

 drivers/usb/serial/f81232.c | 555 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 457 insertions(+), 98 deletions(-)

-- 
1.9.1

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