mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 12:26:41 +07:00
1bc3c9e1e4
Get rid of a bunch of redundant NULL pointer checks in drivers/usb/*, there's no need to check a pointer for NULL before calling kfree() on it. Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> Index: gregkh-2.6/drivers/usb/class/audio.c ===================================================================
1222 lines
32 KiB
C
1222 lines
32 KiB
C
/*
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* Prolific PL2303 USB to serial adaptor driver
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*
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* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2003 IBM Corp.
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*
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* Original driver for 2.2.x by anonymous
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this driver
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*
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* 2002_Mar_26 gkh
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* allowed driver to work properly if there is no tty assigned to a port
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* (this happens for serial console devices.)
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*
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* 2001_Oct_06 gkh
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* Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it.
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*
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* 2001_Sep_19 gkh
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* Added break support.
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*
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* 2001_Aug_30 gkh
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* fixed oops in write_bulk_callback.
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*
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* 2001_Aug_28 gkh
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* reworked buffer logic to be like other usb-serial drivers. Hopefully
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* removing some reported problems.
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*
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* 2001_Jun_06 gkh
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* finished porting to 2.4 format.
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/spinlock.h>
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#include <asm/uaccess.h>
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#include <linux/usb.h>
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#include "usb-serial.h"
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#include "pl2303.h"
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.12"
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#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
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static int debug;
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#define PL2303_CLOSING_WAIT (30*HZ)
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#define PL2303_BUF_SIZE 1024
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#define PL2303_TMP_BUF_SIZE 1024
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static DECLARE_MUTEX(pl2303_tmp_buf_sem);
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struct pl2303_buf {
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unsigned int buf_size;
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char *buf_buf;
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char *buf_get;
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char *buf_put;
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};
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
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{ USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
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{ USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
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{ USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
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{ USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
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{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
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{ USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
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{ USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
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{ USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
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{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
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{ USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
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{ USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
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{ USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
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{ USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
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{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
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{ USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
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{ USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
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{ USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, id_table);
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static struct usb_driver pl2303_driver = {
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.owner = THIS_MODULE,
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.name = "pl2303",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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};
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#define SET_LINE_REQUEST_TYPE 0x21
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#define SET_LINE_REQUEST 0x20
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#define SET_CONTROL_REQUEST_TYPE 0x21
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#define SET_CONTROL_REQUEST 0x22
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#define CONTROL_DTR 0x01
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#define CONTROL_RTS 0x02
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#define BREAK_REQUEST_TYPE 0x21
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#define BREAK_REQUEST 0x23
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#define BREAK_ON 0xffff
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#define BREAK_OFF 0x0000
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#define GET_LINE_REQUEST_TYPE 0xa1
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#define GET_LINE_REQUEST 0x21
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#define VENDOR_WRITE_REQUEST_TYPE 0x40
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#define VENDOR_WRITE_REQUEST 0x01
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#define VENDOR_READ_REQUEST_TYPE 0xc0
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#define VENDOR_READ_REQUEST 0x01
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#define UART_STATE 0x08
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#define UART_STATE_TRANSIENT_MASK 0x74
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#define UART_DCD 0x01
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#define UART_DSR 0x02
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#define UART_BREAK_ERROR 0x04
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#define UART_RING 0x08
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#define UART_FRAME_ERROR 0x10
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#define UART_PARITY_ERROR 0x20
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#define UART_OVERRUN_ERROR 0x40
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#define UART_CTS 0x80
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/* function prototypes for a PL2303 serial converter */
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static int pl2303_open (struct usb_serial_port *port, struct file *filp);
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static void pl2303_close (struct usb_serial_port *port, struct file *filp);
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static void pl2303_set_termios (struct usb_serial_port *port,
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struct termios *old);
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static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg);
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static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
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static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
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static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
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static int pl2303_write (struct usb_serial_port *port,
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const unsigned char *buf, int count);
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static void pl2303_send (struct usb_serial_port *port);
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static int pl2303_write_room(struct usb_serial_port *port);
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static int pl2303_chars_in_buffer(struct usb_serial_port *port);
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static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
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static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
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static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
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unsigned int set, unsigned int clear);
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static int pl2303_startup (struct usb_serial *serial);
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static void pl2303_shutdown (struct usb_serial *serial);
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static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
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static void pl2303_buf_free(struct pl2303_buf *pb);
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static void pl2303_buf_clear(struct pl2303_buf *pb);
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static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
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static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
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static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
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unsigned int count);
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static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
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unsigned int count);
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/* All of the device info needed for the PL2303 SIO serial converter */
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static struct usb_serial_device_type pl2303_device = {
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.owner = THIS_MODULE,
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.name = "PL-2303",
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.id_table = id_table,
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.num_interrupt_in = NUM_DONT_CARE,
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.num_bulk_in = 1,
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.num_bulk_out = 1,
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.num_ports = 1,
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.open = pl2303_open,
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.close = pl2303_close,
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.write = pl2303_write,
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.ioctl = pl2303_ioctl,
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.break_ctl = pl2303_break_ctl,
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.set_termios = pl2303_set_termios,
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.tiocmget = pl2303_tiocmget,
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.tiocmset = pl2303_tiocmset,
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.read_bulk_callback = pl2303_read_bulk_callback,
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.read_int_callback = pl2303_read_int_callback,
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.write_bulk_callback = pl2303_write_bulk_callback,
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.write_room = pl2303_write_room,
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.chars_in_buffer = pl2303_chars_in_buffer,
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.attach = pl2303_startup,
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.shutdown = pl2303_shutdown,
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};
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enum pl2303_type {
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type_0, /* don't know the difference between type 0 and */
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type_1, /* type 1, until someone from prolific tells us... */
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HX, /* HX version of the pl2303 chip */
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};
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struct pl2303_private {
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spinlock_t lock;
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struct pl2303_buf *buf;
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int write_urb_in_use;
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wait_queue_head_t delta_msr_wait;
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u8 line_control;
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u8 line_status;
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u8 termios_initialized;
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enum pl2303_type type;
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};
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static int pl2303_startup (struct usb_serial *serial)
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{
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struct pl2303_private *priv;
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enum pl2303_type type = type_0;
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int i;
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if (serial->dev->descriptor.bDeviceClass == 0x02)
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type = type_0;
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else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
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type = HX;
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else if (serial->dev->descriptor.bDeviceClass == 0x00)
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type = type_1;
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else if (serial->dev->descriptor.bDeviceClass == 0xFF)
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type = type_1;
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dbg("device type: %d", type);
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for (i = 0; i < serial->num_ports; ++i) {
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priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
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if (!priv)
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goto cleanup;
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memset (priv, 0x00, sizeof (struct pl2303_private));
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spin_lock_init(&priv->lock);
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priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
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if (priv->buf == NULL) {
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kfree(priv);
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goto cleanup;
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}
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init_waitqueue_head(&priv->delta_msr_wait);
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priv->type = type;
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usb_set_serial_port_data(serial->port[i], priv);
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}
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return 0;
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cleanup:
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for (--i; i>=0; --i) {
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priv = usb_get_serial_port_data(serial->port[i]);
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pl2303_buf_free(priv->buf);
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kfree(priv);
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usb_set_serial_port_data(serial->port[i], NULL);
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}
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return -ENOMEM;
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}
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static int set_control_lines (struct usb_device *dev, u8 value)
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{
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int retval;
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retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
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SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
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value, 0, NULL, 0, 100);
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dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
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return retval;
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}
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static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count)
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{
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
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if (!count)
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return count;
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spin_lock_irqsave(&priv->lock, flags);
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count = pl2303_buf_put(priv->buf, buf, count);
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spin_unlock_irqrestore(&priv->lock, flags);
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pl2303_send(port);
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return count;
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}
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static void pl2303_send(struct usb_serial_port *port)
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{
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int count, result;
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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dbg("%s - port %d", __FUNCTION__, port->number);
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spin_lock_irqsave(&priv->lock, flags);
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if (priv->write_urb_in_use) {
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spin_unlock_irqrestore(&priv->lock, flags);
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return;
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}
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count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
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port->bulk_out_size);
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if (count == 0) {
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spin_unlock_irqrestore(&priv->lock, flags);
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return;
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}
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priv->write_urb_in_use = 1;
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spin_unlock_irqrestore(&priv->lock, flags);
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usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
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port->write_urb->transfer_buffer_length = count;
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port->write_urb->dev = port->serial->dev;
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result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
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if (result) {
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dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
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priv->write_urb_in_use = 0;
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// TODO: reschedule pl2303_send
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}
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schedule_work(&port->work);
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}
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static int pl2303_write_room(struct usb_serial_port *port)
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{
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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int room = 0;
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unsigned long flags;
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dbg("%s - port %d", __FUNCTION__, port->number);
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spin_lock_irqsave(&priv->lock, flags);
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room = pl2303_buf_space_avail(priv->buf);
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spin_unlock_irqrestore(&priv->lock, flags);
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dbg("%s - returns %d", __FUNCTION__, room);
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return room;
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}
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static int pl2303_chars_in_buffer(struct usb_serial_port *port)
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{
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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int chars = 0;
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unsigned long flags;
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dbg("%s - port %d", __FUNCTION__, port->number);
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spin_lock_irqsave(&priv->lock, flags);
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chars = pl2303_buf_data_avail(priv->buf);
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spin_unlock_irqrestore(&priv->lock, flags);
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dbg("%s - returns %d", __FUNCTION__, chars);
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return chars;
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}
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static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
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{
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struct usb_serial *serial = port->serial;
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struct pl2303_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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unsigned int cflag;
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unsigned char *buf;
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int baud;
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int i;
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u8 control;
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dbg("%s - port %d", __FUNCTION__, port->number);
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if ((!port->tty) || (!port->tty->termios)) {
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dbg("%s - no tty structures", __FUNCTION__);
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return;
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}
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spin_lock_irqsave(&priv->lock, flags);
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if (!priv->termios_initialized) {
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*(port->tty->termios) = tty_std_termios;
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port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
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priv->termios_initialized = 1;
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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cflag = port->tty->termios->c_cflag;
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/* check that they really want us to change something */
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if (old_termios) {
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if ((cflag == old_termios->c_cflag) &&
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(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
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dbg("%s - nothing to change...", __FUNCTION__);
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return;
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}
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}
|
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|
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buf = kmalloc (7, GFP_KERNEL);
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if (!buf) {
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dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
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return;
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}
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memset (buf, 0x00, 0x07);
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i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
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GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
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0, 0, buf, 7, 100);
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dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
|
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|
|
|
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if (cflag & CSIZE) {
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switch (cflag & CSIZE) {
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case CS5: buf[6] = 5; break;
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case CS6: buf[6] = 6; break;
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case CS7: buf[6] = 7; break;
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default:
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case CS8: buf[6] = 8; break;
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}
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dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
|
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}
|
|
|
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baud = 0;
|
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switch (cflag & CBAUD) {
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case B0: baud = 0; break;
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case B75: baud = 75; break;
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case B150: baud = 150; break;
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case B300: baud = 300; break;
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case B600: baud = 600; break;
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case B1200: baud = 1200; break;
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case B1800: baud = 1800; break;
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case B2400: baud = 2400; break;
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case B4800: baud = 4800; break;
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case B9600: baud = 9600; break;
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case B19200: baud = 19200; break;
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case B38400: baud = 38400; break;
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case B57600: baud = 57600; break;
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case B115200: baud = 115200; break;
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case B230400: baud = 230400; break;
|
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case B460800: baud = 460800; break;
|
|
default:
|
|
dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
|
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break;
|
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}
|
|
dbg("%s - baud = %d", __FUNCTION__, baud);
|
|
if (baud) {
|
|
buf[0] = baud & 0xff;
|
|
buf[1] = (baud >> 8) & 0xff;
|
|
buf[2] = (baud >> 16) & 0xff;
|
|
buf[3] = (baud >> 24) & 0xff;
|
|
}
|
|
|
|
/* For reference buf[4]=0 is 1 stop bits */
|
|
/* For reference buf[4]=1 is 1.5 stop bits */
|
|
/* For reference buf[4]=2 is 2 stop bits */
|
|
if (cflag & CSTOPB) {
|
|
buf[4] = 2;
|
|
dbg("%s - stop bits = 2", __FUNCTION__);
|
|
} else {
|
|
buf[4] = 0;
|
|
dbg("%s - stop bits = 1", __FUNCTION__);
|
|
}
|
|
|
|
if (cflag & PARENB) {
|
|
/* For reference buf[5]=0 is none parity */
|
|
/* For reference buf[5]=1 is odd parity */
|
|
/* For reference buf[5]=2 is even parity */
|
|
/* For reference buf[5]=3 is mark parity */
|
|
/* For reference buf[5]=4 is space parity */
|
|
if (cflag & PARODD) {
|
|
buf[5] = 1;
|
|
dbg("%s - parity = odd", __FUNCTION__);
|
|
} else {
|
|
buf[5] = 2;
|
|
dbg("%s - parity = even", __FUNCTION__);
|
|
}
|
|
} else {
|
|
buf[5] = 0;
|
|
dbg("%s - parity = none", __FUNCTION__);
|
|
}
|
|
|
|
i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
|
|
SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
|
|
0, 0, buf, 7, 100);
|
|
dbg ("0x21:0x20:0:0 %d", i);
|
|
|
|
/* change control lines if we are switching to or from B0 */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control = priv->line_control;
|
|
if ((cflag & CBAUD) == B0)
|
|
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
|
|
else
|
|
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
|
|
if (control != priv->line_control) {
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
set_control_lines(serial->dev, control);
|
|
} else {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
|
|
|
|
i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
|
|
GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
|
|
0, 0, buf, 7, 100);
|
|
dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
|
|
buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
|
|
|
|
if (cflag & CRTSCTS) {
|
|
__u16 index;
|
|
if (priv->type == HX)
|
|
index = 0x61;
|
|
else
|
|
index = 0x41;
|
|
i = usb_control_msg(serial->dev,
|
|
usb_sndctrlpipe(serial->dev, 0),
|
|
VENDOR_WRITE_REQUEST,
|
|
VENDOR_WRITE_REQUEST_TYPE,
|
|
0x0, index, NULL, 0, 100);
|
|
dbg ("0x40:0x1:0x0:0x%x %d", index, i);
|
|
}
|
|
|
|
kfree (buf);
|
|
}
|
|
|
|
static int pl2303_open (struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
struct termios tmp_termios;
|
|
struct usb_serial *serial = port->serial;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char *buf;
|
|
int result;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
usb_clear_halt(serial->dev, port->write_urb->pipe);
|
|
usb_clear_halt(serial->dev, port->read_urb->pipe);
|
|
|
|
buf = kmalloc(10, GFP_KERNEL);
|
|
if (buf==NULL)
|
|
return -ENOMEM;
|
|
|
|
#define FISH(a,b,c,d) \
|
|
result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \
|
|
b, a, c, d, buf, 1, 100); \
|
|
dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]);
|
|
|
|
#define SOUP(a,b,c,d) \
|
|
result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \
|
|
b, a, c, d, NULL, 0, 100); \
|
|
dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result);
|
|
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
|
|
FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
|
|
|
|
if (priv->type == HX) {
|
|
/* HX chip */
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
|
|
/* reset upstream data pipes */
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
|
|
} else {
|
|
SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
|
|
}
|
|
|
|
kfree(buf);
|
|
|
|
/* Setup termios */
|
|
if (port->tty) {
|
|
pl2303_set_termios (port, &tmp_termios);
|
|
}
|
|
|
|
//FIXME: need to assert RTS and DTR if CRTSCTS off
|
|
|
|
dbg("%s - submitting read urb", __FUNCTION__);
|
|
port->read_urb->dev = serial->dev;
|
|
result = usb_submit_urb (port->read_urb, GFP_KERNEL);
|
|
if (result) {
|
|
dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
|
|
pl2303_close (port, NULL);
|
|
return -EPROTO;
|
|
}
|
|
|
|
dbg("%s - submitting interrupt urb", __FUNCTION__);
|
|
port->interrupt_in_urb->dev = serial->dev;
|
|
result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
|
|
if (result) {
|
|
dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
|
|
pl2303_close (port, NULL);
|
|
return -EPROTO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void pl2303_close (struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned int c_cflag;
|
|
int bps;
|
|
long timeout;
|
|
wait_queue_t wait; \
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
/* wait for data to drain from the buffer */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
timeout = PL2303_CLOSING_WAIT;
|
|
init_waitqueue_entry(&wait, current);
|
|
add_wait_queue(&port->tty->write_wait, &wait);
|
|
for (;;) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (pl2303_buf_data_avail(priv->buf) == 0
|
|
|| timeout == 0 || signal_pending(current)
|
|
|| !usb_get_intfdata(port->serial->interface)) /* disconnect */
|
|
break;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
timeout = schedule_timeout(timeout);
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&port->tty->write_wait, &wait);
|
|
/* clear out any remaining data in the buffer */
|
|
pl2303_buf_clear(priv->buf);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
/* wait for characters to drain from the device */
|
|
/* (this is long enough for the entire 256 byte */
|
|
/* pl2303 hardware buffer to drain with no flow */
|
|
/* control for data rates of 1200 bps or more, */
|
|
/* for lower rates we should really know how much */
|
|
/* data is in the buffer to compute a delay */
|
|
/* that is not unnecessarily long) */
|
|
bps = tty_get_baud_rate(port->tty);
|
|
if (bps > 1200)
|
|
timeout = max((HZ*2560)/bps,HZ/10);
|
|
else
|
|
timeout = 2*HZ;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
schedule_timeout(timeout);
|
|
|
|
/* shutdown our urbs */
|
|
dbg("%s - shutting down urbs", __FUNCTION__);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
|
|
if (port->tty) {
|
|
c_cflag = port->tty->termios->c_cflag;
|
|
if (c_cflag & HUPCL) {
|
|
/* drop DTR and RTS */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_control = 0;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
set_control_lines (port->serial->dev, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 control;
|
|
|
|
if (!usb_get_intfdata(port->serial->interface))
|
|
return -ENODEV;
|
|
|
|
spin_lock_irqsave (&priv->lock, flags);
|
|
if (set & TIOCM_RTS)
|
|
priv->line_control |= CONTROL_RTS;
|
|
if (set & TIOCM_DTR)
|
|
priv->line_control |= CONTROL_DTR;
|
|
if (clear & TIOCM_RTS)
|
|
priv->line_control &= ~CONTROL_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
priv->line_control &= ~CONTROL_DTR;
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
|
|
return set_control_lines (port->serial->dev, control);
|
|
}
|
|
|
|
static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned int mcr;
|
|
unsigned int status;
|
|
unsigned int result;
|
|
|
|
dbg("%s (%d)", __FUNCTION__, port->number);
|
|
|
|
if (!usb_get_intfdata(port->serial->interface))
|
|
return -ENODEV;
|
|
|
|
spin_lock_irqsave (&priv->lock, flags);
|
|
mcr = priv->line_control;
|
|
status = priv->line_status;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
|
|
result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
|
|
| ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
|
|
| ((status & UART_CTS) ? TIOCM_CTS : 0)
|
|
| ((status & UART_DSR) ? TIOCM_DSR : 0)
|
|
| ((status & UART_RING) ? TIOCM_RI : 0)
|
|
| ((status & UART_DCD) ? TIOCM_CD : 0);
|
|
|
|
dbg("%s - result = %x", __FUNCTION__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
|
|
{
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned int prevstatus;
|
|
unsigned int status;
|
|
unsigned int changed;
|
|
|
|
spin_lock_irqsave (&priv->lock, flags);
|
|
prevstatus = priv->line_status;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
|
|
while (1) {
|
|
interruptible_sleep_on(&priv->delta_msr_wait);
|
|
/* see if a signal did it */
|
|
if (signal_pending(current))
|
|
return -ERESTARTSYS;
|
|
|
|
spin_lock_irqsave (&priv->lock, flags);
|
|
status = priv->line_status;
|
|
spin_unlock_irqrestore (&priv->lock, flags);
|
|
|
|
changed=prevstatus^status;
|
|
|
|
if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
|
|
((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
|
|
((arg & TIOCM_CD) && (changed & UART_DCD)) ||
|
|
((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
|
|
return 0;
|
|
}
|
|
prevstatus = status;
|
|
}
|
|
/* NOTREACHED */
|
|
return 0;
|
|
}
|
|
|
|
static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCMIWAIT:
|
|
dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
|
|
return wait_modem_info(port, arg);
|
|
|
|
default:
|
|
dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
|
|
break;
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
u16 state;
|
|
int result;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (break_state == 0)
|
|
state = BREAK_OFF;
|
|
else
|
|
state = BREAK_ON;
|
|
dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
|
|
|
|
result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
|
|
BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
|
|
0, NULL, 0, 100);
|
|
if (result)
|
|
dbg("%s - error sending break = %d", __FUNCTION__, result);
|
|
}
|
|
|
|
|
|
static void pl2303_shutdown (struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
struct pl2303_private *priv;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
for (i = 0; i < serial->num_ports; ++i) {
|
|
priv = usb_get_serial_port_data(serial->port[i]);
|
|
if (priv) {
|
|
pl2303_buf_free(priv->buf);
|
|
kfree(priv);
|
|
usb_set_serial_port_data(serial->port[i], NULL);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void pl2303_update_line_status(struct usb_serial_port *port,
|
|
unsigned char *data,
|
|
unsigned int actual_length)
|
|
{
|
|
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 status_idx = UART_STATE;
|
|
u8 length = UART_STATE;
|
|
|
|
if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
|
|
(le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
|
|
length = 1;
|
|
status_idx = 0;
|
|
}
|
|
|
|
if (actual_length < length)
|
|
goto exit;
|
|
|
|
/* Save off the uart status for others to look at */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->line_status = data[status_idx];
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
exit:
|
|
return;
|
|
}
|
|
|
|
static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
unsigned int actual_length = urb->actual_length;
|
|
int status;
|
|
|
|
dbg("%s (%d)", __FUNCTION__, port->number);
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
|
|
goto exit;
|
|
}
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
|
|
pl2303_update_line_status(port, data, actual_length);
|
|
|
|
exit:
|
|
status = usb_submit_urb (urb, GFP_ATOMIC);
|
|
if (status)
|
|
dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
|
|
__FUNCTION__, status);
|
|
}
|
|
|
|
|
|
static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
struct tty_struct *tty;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
unsigned long flags;
|
|
int i;
|
|
int result;
|
|
u8 status;
|
|
char tty_flag;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (urb->status) {
|
|
dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
|
|
if (!port->open_count) {
|
|
dbg("%s - port is closed, exiting.", __FUNCTION__);
|
|
return;
|
|
}
|
|
if (urb->status == -EPROTO) {
|
|
/* PL2303 mysteriously fails with -EPROTO reschedule the read */
|
|
dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
|
|
urb->status = 0;
|
|
urb->dev = port->serial->dev;
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result)
|
|
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
|
|
return;
|
|
}
|
|
dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
|
|
|
|
/* get tty_flag from status */
|
|
tty_flag = TTY_NORMAL;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
status = priv->line_status;
|
|
priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
wake_up_interruptible (&priv->delta_msr_wait);
|
|
|
|
/* break takes precedence over parity, */
|
|
/* which takes precedence over framing errors */
|
|
if (status & UART_BREAK_ERROR )
|
|
tty_flag = TTY_BREAK;
|
|
else if (status & UART_PARITY_ERROR)
|
|
tty_flag = TTY_PARITY;
|
|
else if (status & UART_FRAME_ERROR)
|
|
tty_flag = TTY_FRAME;
|
|
dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
|
|
|
|
tty = port->tty;
|
|
if (tty && urb->actual_length) {
|
|
/* overrun is special, not associated with a char */
|
|
if (status & UART_OVERRUN_ERROR)
|
|
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
|
|
|
|
for (i = 0; i < urb->actual_length; ++i) {
|
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
tty_insert_flip_char (tty, data[i], tty_flag);
|
|
}
|
|
tty_flip_buffer_push (tty);
|
|
}
|
|
|
|
/* Schedule the next read _if_ we are still open */
|
|
if (port->open_count) {
|
|
urb->dev = port->serial->dev;
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result)
|
|
dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
|
|
struct pl2303_private *priv = usb_get_serial_port_data(port);
|
|
int result;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
switch (urb->status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
|
|
priv->write_urb_in_use = 0;
|
|
return;
|
|
default:
|
|
/* error in the urb, so we have to resubmit it */
|
|
dbg("%s - Overflow in write", __FUNCTION__);
|
|
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
|
|
port->write_urb->transfer_buffer_length = 1;
|
|
port->write_urb->dev = port->serial->dev;
|
|
result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
|
|
if (result)
|
|
dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
|
|
else
|
|
return;
|
|
}
|
|
|
|
priv->write_urb_in_use = 0;
|
|
|
|
/* send any buffered data */
|
|
pl2303_send(port);
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_alloc
|
|
*
|
|
* Allocate a circular buffer and all associated memory.
|
|
*/
|
|
|
|
static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
|
|
{
|
|
|
|
struct pl2303_buf *pb;
|
|
|
|
|
|
if (size == 0)
|
|
return NULL;
|
|
|
|
pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
|
|
if (pb == NULL)
|
|
return NULL;
|
|
|
|
pb->buf_buf = kmalloc(size, GFP_KERNEL);
|
|
if (pb->buf_buf == NULL) {
|
|
kfree(pb);
|
|
return NULL;
|
|
}
|
|
|
|
pb->buf_size = size;
|
|
pb->buf_get = pb->buf_put = pb->buf_buf;
|
|
|
|
return pb;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_free
|
|
*
|
|
* Free the buffer and all associated memory.
|
|
*/
|
|
|
|
static void pl2303_buf_free(struct pl2303_buf *pb)
|
|
{
|
|
if (pb) {
|
|
kfree(pb->buf_buf);
|
|
kfree(pb);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_clear
|
|
*
|
|
* Clear out all data in the circular buffer.
|
|
*/
|
|
|
|
static void pl2303_buf_clear(struct pl2303_buf *pb)
|
|
{
|
|
if (pb != NULL)
|
|
pb->buf_get = pb->buf_put;
|
|
/* equivalent to a get of all data available */
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_data_avail
|
|
*
|
|
* Return the number of bytes of data available in the circular
|
|
* buffer.
|
|
*/
|
|
|
|
static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
|
|
{
|
|
if (pb != NULL)
|
|
return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_space_avail
|
|
*
|
|
* Return the number of bytes of space available in the circular
|
|
* buffer.
|
|
*/
|
|
|
|
static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
|
|
{
|
|
if (pb != NULL)
|
|
return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_put
|
|
*
|
|
* Copy data data from a user buffer and put it into the circular buffer.
|
|
* Restrict to the amount of space available.
|
|
*
|
|
* Return the number of bytes copied.
|
|
*/
|
|
|
|
static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
|
|
unsigned int count)
|
|
{
|
|
|
|
unsigned int len;
|
|
|
|
|
|
if (pb == NULL)
|
|
return 0;
|
|
|
|
len = pl2303_buf_space_avail(pb);
|
|
if (count > len)
|
|
count = len;
|
|
|
|
if (count == 0)
|
|
return 0;
|
|
|
|
len = pb->buf_buf + pb->buf_size - pb->buf_put;
|
|
if (count > len) {
|
|
memcpy(pb->buf_put, buf, len);
|
|
memcpy(pb->buf_buf, buf+len, count - len);
|
|
pb->buf_put = pb->buf_buf + count - len;
|
|
} else {
|
|
memcpy(pb->buf_put, buf, count);
|
|
if (count < len)
|
|
pb->buf_put += count;
|
|
else /* count == len */
|
|
pb->buf_put = pb->buf_buf;
|
|
}
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* pl2303_buf_get
|
|
*
|
|
* Get data from the circular buffer and copy to the given buffer.
|
|
* Restrict to the amount of data available.
|
|
*
|
|
* Return the number of bytes copied.
|
|
*/
|
|
|
|
static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
|
|
unsigned int count)
|
|
{
|
|
|
|
unsigned int len;
|
|
|
|
|
|
if (pb == NULL)
|
|
return 0;
|
|
|
|
len = pl2303_buf_data_avail(pb);
|
|
if (count > len)
|
|
count = len;
|
|
|
|
if (count == 0)
|
|
return 0;
|
|
|
|
len = pb->buf_buf + pb->buf_size - pb->buf_get;
|
|
if (count > len) {
|
|
memcpy(buf, pb->buf_get, len);
|
|
memcpy(buf+len, pb->buf_buf, count - len);
|
|
pb->buf_get = pb->buf_buf + count - len;
|
|
} else {
|
|
memcpy(buf, pb->buf_get, count);
|
|
if (count < len)
|
|
pb->buf_get += count;
|
|
else /* count == len */
|
|
pb->buf_get = pb->buf_buf;
|
|
}
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
static int __init pl2303_init (void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&pl2303_device);
|
|
if (retval)
|
|
goto failed_usb_serial_register;
|
|
retval = usb_register(&pl2303_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
info(DRIVER_DESC " " DRIVER_VERSION);
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&pl2303_device);
|
|
failed_usb_serial_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit pl2303_exit (void)
|
|
{
|
|
usb_deregister (&pl2303_driver);
|
|
usb_serial_deregister (&pl2303_device);
|
|
}
|
|
|
|
|
|
module_init(pl2303_init);
|
|
module_exit(pl2303_exit);
|
|
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_VERSION(DRIVER_VERSION);
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|
|
|