| /* |
| * Prolific PL2303 USB to serial adaptor driver |
| * |
| * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com) |
| * Copyright (C) 2003 IBM Corp. |
| * |
| * Original driver for 2.2.x by anonymous |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License version |
| * 2 as published by the Free Software Foundation. |
| * |
| * See Documentation/usb/usb-serial.txt for more information on using this |
| * driver |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/tty.h> |
| #include <linux/tty_driver.h> |
| #include <linux/tty_flip.h> |
| #include <linux/serial.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/spinlock.h> |
| #include <linux/uaccess.h> |
| #include <linux/usb.h> |
| #include <linux/usb/serial.h> |
| #include "pl2303.h" |
| |
| /* |
| * Version Information |
| */ |
| #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
| |
| static int debug; |
| |
| #define PL2303_CLOSING_WAIT (30*HZ) |
| |
| #define PL2303_BUF_SIZE 1024 |
| #define PL2303_TMP_BUF_SIZE 1024 |
| |
| struct pl2303_buf { |
| unsigned int buf_size; |
| char *buf_buf; |
| char *buf_get; |
| char *buf_put; |
| }; |
| |
| static const struct usb_device_id id_table[] = { |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, |
| { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, |
| { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
| { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, |
| { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
| { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, |
| { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, |
| { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, |
| { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, |
| { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, |
| { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
| { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, |
| { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, |
| { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, |
| { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, |
| { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, |
| { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, |
| { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, |
| { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, |
| { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, |
| { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, |
| { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, |
| { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ |
| { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, |
| { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, |
| { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, |
| { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, |
| { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, |
| { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, |
| { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, |
| { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, |
| { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, |
| { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, |
| { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, |
| { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, |
| { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, |
| { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, |
| { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, |
| { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, |
| { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, |
| { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, |
| { } /* Terminating entry */ |
| }; |
| |
| MODULE_DEVICE_TABLE(usb, id_table); |
| |
| static struct usb_driver pl2303_driver = { |
| .name = "pl2303", |
| .probe = usb_serial_probe, |
| .disconnect = usb_serial_disconnect, |
| .id_table = id_table, |
| .suspend = usb_serial_suspend, |
| .resume = usb_serial_resume, |
| .no_dynamic_id = 1, |
| .supports_autosuspend = 1, |
| }; |
| |
| #define SET_LINE_REQUEST_TYPE 0x21 |
| #define SET_LINE_REQUEST 0x20 |
| |
| #define SET_CONTROL_REQUEST_TYPE 0x21 |
| #define SET_CONTROL_REQUEST 0x22 |
| #define CONTROL_DTR 0x01 |
| #define CONTROL_RTS 0x02 |
| |
| #define BREAK_REQUEST_TYPE 0x21 |
| #define BREAK_REQUEST 0x23 |
| #define BREAK_ON 0xffff |
| #define BREAK_OFF 0x0000 |
| |
| #define GET_LINE_REQUEST_TYPE 0xa1 |
| #define GET_LINE_REQUEST 0x21 |
| |
| #define VENDOR_WRITE_REQUEST_TYPE 0x40 |
| #define VENDOR_WRITE_REQUEST 0x01 |
| |
| #define VENDOR_READ_REQUEST_TYPE 0xc0 |
| #define VENDOR_READ_REQUEST 0x01 |
| |
| #define UART_STATE 0x08 |
| #define UART_STATE_TRANSIENT_MASK 0x74 |
| #define UART_DCD 0x01 |
| #define UART_DSR 0x02 |
| #define UART_BREAK_ERROR 0x04 |
| #define UART_RING 0x08 |
| #define UART_FRAME_ERROR 0x10 |
| #define UART_PARITY_ERROR 0x20 |
| #define UART_OVERRUN_ERROR 0x40 |
| #define UART_CTS 0x80 |
| |
| |
| enum pl2303_type { |
| type_0, /* don't know the difference between type 0 and */ |
| type_1, /* type 1, until someone from prolific tells us... */ |
| HX, /* HX version of the pl2303 chip */ |
| }; |
| |
| struct pl2303_private { |
| spinlock_t lock; |
| struct pl2303_buf *buf; |
| int write_urb_in_use; |
| wait_queue_head_t delta_msr_wait; |
| u8 line_control; |
| u8 line_status; |
| enum pl2303_type type; |
| }; |
| |
| /* |
| * 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 = 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 0; |
| |
| return (pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size; |
| } |
| |
| /* |
| * 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 0; |
| |
| return (pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size; |
| } |
| |
| /* |
| * 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 pl2303_vendor_read(__u16 value, __u16 index, |
| struct usb_serial *serial, unsigned char *buf) |
| { |
| int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), |
| VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, |
| value, index, buf, 1, 100); |
| dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE, |
| VENDOR_READ_REQUEST, value, index, res, buf[0]); |
| return res; |
| } |
| |
| static int pl2303_vendor_write(__u16 value, __u16 index, |
| struct usb_serial *serial) |
| { |
| int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), |
| VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
| value, index, NULL, 0, 100); |
| dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE, |
| VENDOR_WRITE_REQUEST, value, index, res); |
| return res; |
| } |
| |
| static int pl2303_startup(struct usb_serial *serial) |
| { |
| struct pl2303_private *priv; |
| enum pl2303_type type = type_0; |
| unsigned char *buf; |
| int i; |
| |
| buf = kmalloc(10, GFP_KERNEL); |
| if (buf == NULL) |
| return -ENOMEM; |
| |
| if (serial->dev->descriptor.bDeviceClass == 0x02) |
| type = type_0; |
| else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) |
| type = HX; |
| else if (serial->dev->descriptor.bDeviceClass == 0x00) |
| type = type_1; |
| else if (serial->dev->descriptor.bDeviceClass == 0xFF) |
| type = type_1; |
| dbg("device type: %d", type); |
| |
| for (i = 0; i < serial->num_ports; ++i) { |
| priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); |
| if (!priv) |
| goto cleanup; |
| spin_lock_init(&priv->lock); |
| priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); |
| if (priv->buf == NULL) { |
| kfree(priv); |
| goto cleanup; |
| } |
| init_waitqueue_head(&priv->delta_msr_wait); |
| priv->type = type; |
| usb_set_serial_port_data(serial->port[i], priv); |
| } |
| |
| pl2303_vendor_read(0x8484, 0, serial, buf); |
| pl2303_vendor_write(0x0404, 0, serial); |
| pl2303_vendor_read(0x8484, 0, serial, buf); |
| pl2303_vendor_read(0x8383, 0, serial, buf); |
| pl2303_vendor_read(0x8484, 0, serial, buf); |
| pl2303_vendor_write(0x0404, 1, serial); |
| pl2303_vendor_read(0x8484, 0, serial, buf); |
| pl2303_vendor_read(0x8383, 0, serial, buf); |
| pl2303_vendor_write(0, 1, serial); |
| pl2303_vendor_write(1, 0, serial); |
| if (type == HX) |
| pl2303_vendor_write(2, 0x44, serial); |
| else |
| pl2303_vendor_write(2, 0x24, serial); |
| |
| kfree(buf); |
| return 0; |
| |
| cleanup: |
| kfree(buf); |
| for (--i; i >= 0; --i) { |
| priv = usb_get_serial_port_data(serial->port[i]); |
| pl2303_buf_free(priv->buf); |
| kfree(priv); |
| usb_set_serial_port_data(serial->port[i], NULL); |
| } |
| return -ENOMEM; |
| } |
| |
| static int set_control_lines(struct usb_device *dev, u8 value) |
| { |
| int retval; |
| |
| retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), |
| SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, |
| value, 0, NULL, 0, 100); |
| dbg("%s - value = %d, retval = %d", __func__, value, retval); |
| return retval; |
| } |
| |
| static void pl2303_send(struct usb_serial_port *port) |
| { |
| int count, result; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| |
| if (priv->write_urb_in_use) { |
| spin_unlock_irqrestore(&priv->lock, flags); |
| return; |
| } |
| |
| count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, |
| port->bulk_out_size); |
| |
| if (count == 0) { |
| spin_unlock_irqrestore(&priv->lock, flags); |
| return; |
| } |
| |
| priv->write_urb_in_use = 1; |
| |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| usb_serial_debug_data(debug, &port->dev, __func__, count, |
| port->write_urb->transfer_buffer); |
| |
| port->write_urb->transfer_buffer_length = count; |
| result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| if (result) { |
| dev_err(&port->dev, "%s - failed submitting write urb," |
| " error %d\n", __func__, result); |
| priv->write_urb_in_use = 0; |
| /* TODO: reschedule pl2303_send */ |
| } |
| |
| usb_serial_port_softint(port); |
| } |
| |
| static int pl2303_write(struct tty_struct *tty, struct usb_serial_port *port, |
| const unsigned char *buf, int count) |
| { |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| |
| dbg("%s - port %d, %d bytes", __func__, port->number, count); |
| |
| if (!count) |
| return count; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| count = pl2303_buf_put(priv->buf, buf, count); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| pl2303_send(port); |
| |
| return count; |
| } |
| |
| static int pl2303_write_room(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| int room = 0; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| room = pl2303_buf_space_avail(priv->buf); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| dbg("%s - returns %d", __func__, room); |
| return room; |
| } |
| |
| static int pl2303_chars_in_buffer(struct tty_struct *tty) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| int chars = 0; |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| chars = pl2303_buf_data_avail(priv->buf); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| dbg("%s - returns %d", __func__, chars); |
| return chars; |
| } |
| |
| static void pl2303_set_termios(struct tty_struct *tty, |
| struct usb_serial_port *port, struct ktermios *old_termios) |
| { |
| struct usb_serial *serial = port->serial; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| unsigned int cflag; |
| unsigned char *buf; |
| int baud; |
| int i; |
| u8 control; |
| const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600, |
| 4800, 7200, 9600, 14400, 19200, 28800, 38400, |
| 57600, 115200, 230400, 460800, 614400, |
| 921600, 1228800, 2457600, 3000000, 6000000 }; |
| int baud_floor, baud_ceil; |
| int k; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| /* The PL2303 is reported to lose bytes if you change |
| serial settings even to the same values as before. Thus |
| we actually need to filter in this specific case */ |
| |
| if (!tty_termios_hw_change(tty->termios, old_termios)) |
| return; |
| |
| cflag = tty->termios->c_cflag; |
| |
| buf = kzalloc(7, GFP_KERNEL); |
| if (!buf) { |
| dev_err(&port->dev, "%s - out of memory.\n", __func__); |
| /* Report back no change occurred */ |
| *tty->termios = *old_termios; |
| return; |
| } |
| |
| 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 & CSIZE) { |
| switch (cflag & CSIZE) { |
| case CS5: |
| buf[6] = 5; |
| break; |
| case CS6: |
| buf[6] = 6; |
| break; |
| case CS7: |
| buf[6] = 7; |
| break; |
| default: |
| case CS8: |
| buf[6] = 8; |
| break; |
| } |
| dbg("%s - data bits = %d", __func__, buf[6]); |
| } |
| |
| /* For reference buf[0]:buf[3] baud rate value */ |
| /* NOTE: Only the values defined in baud_sup are supported ! |
| * => if unsupported values are set, the PL2303 seems to use |
| * 9600 baud (at least my PL2303X always does) |
| */ |
| baud = tty_get_baud_rate(tty); |
| dbg("%s - baud requested = %d", __func__, baud); |
| if (baud) { |
| /* Set baudrate to nearest supported value */ |
| for (k=0; k<ARRAY_SIZE(baud_sup); k++) { |
| if (baud_sup[k] / baud) { |
| baud_ceil = baud_sup[k]; |
| if (k==0) { |
| baud = baud_ceil; |
| } else { |
| baud_floor = baud_sup[k-1]; |
| if ((baud_ceil % baud) |
| > (baud % baud_floor)) |
| baud = baud_floor; |
| else |
| baud = baud_ceil; |
| } |
| break; |
| } |
| } |
| if (baud > 1228800) { |
| /* type_0, type_1 only support up to 1228800 baud */ |
| if (priv->type != HX) |
| baud = 1228800; |
| else if (baud > 6000000) |
| baud = 6000000; |
| } |
| dbg("%s - baud set = %d", __func__, 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) { |
| /* NOTE: Comply with "real" UARTs / RS232: |
| * use 1.5 instead of 2 stop bits with 5 data bits |
| */ |
| if ((cflag & CSIZE) == CS5) { |
| buf[4] = 1; |
| dbg("%s - stop bits = 1.5", __func__); |
| } else { |
| buf[4] = 2; |
| dbg("%s - stop bits = 2", __func__); |
| } |
| } else { |
| buf[4] = 0; |
| dbg("%s - stop bits = 1", __func__); |
| } |
| |
| 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) { |
| if (cflag & CMSPAR) { |
| buf[5] = 3; |
| dbg("%s - parity = mark", __func__); |
| } else { |
| buf[5] = 1; |
| dbg("%s - parity = odd", __func__); |
| } |
| } else { |
| if (cflag & CMSPAR) { |
| buf[5] = 4; |
| dbg("%s - parity = space", __func__); |
| } else { |
| buf[5] = 2; |
| dbg("%s - parity = even", __func__); |
| } |
| } |
| } else { |
| buf[5] = 0; |
| dbg("%s - parity = none", __func__); |
| } |
| |
| 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) { |
| if (priv->type == HX) |
| pl2303_vendor_write(0x0, 0x61, serial); |
| else |
| pl2303_vendor_write(0x0, 0x41, serial); |
| } else { |
| pl2303_vendor_write(0x0, 0x0, serial); |
| } |
| |
| /* Save resulting baud rate */ |
| if (baud) |
| tty_encode_baud_rate(tty, baud, baud); |
| |
| kfree(buf); |
| } |
| |
| static void pl2303_dtr_rts(struct usb_serial_port *port, int on) |
| { |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| u8 control; |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| /* Change DTR and RTS */ |
| if (on) |
| priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
| else |
| priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
| control = priv->line_control; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| set_control_lines(port->serial->dev, control); |
| } |
| |
| static void pl2303_close(struct usb_serial_port *port) |
| { |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| unsigned long flags; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| /* clear out any remaining data in the buffer */ |
| pl2303_buf_clear(priv->buf); |
| spin_unlock_irqrestore(&priv->lock, flags); |
| |
| /* shutdown our urbs */ |
| dbg("%s - shutting down urbs", __func__); |
| usb_kill_urb(port->write_urb); |
| usb_kill_urb(port->read_urb); |
| usb_kill_urb(port->interrupt_in_urb); |
| |
| } |
| |
| static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) |
| { |
| struct ktermios tmp_termios; |
| struct usb_serial *serial = port->serial; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| int result; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (priv->type != HX) { |
| usb_clear_halt(serial->dev, port->write_urb->pipe); |
| usb_clear_halt(serial->dev, port->read_urb->pipe); |
| } else { |
| /* reset upstream data pipes */ |
| pl2303_vendor_write(8, 0, serial); |
| pl2303_vendor_write(9, 0, serial); |
| } |
| |
| /* Setup termios */ |
| if (tty) |
| pl2303_set_termios(tty, port, &tmp_termios); |
| |
| dbg("%s - submitting read urb", __func__); |
| result = usb_submit_urb(port->read_urb, GFP_KERNEL); |
| if (result) { |
| dev_err(&port->dev, "%s - failed submitting read urb," |
| " error %d\n", __func__, result); |
| pl2303_close(port); |
| return -EPROTO; |
| } |
| |
| dbg("%s - submitting interrupt urb", __func__); |
| result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); |
| if (result) { |
| dev_err(&port->dev, "%s - failed submitting interrupt urb," |
| " error %d\n", __func__, result); |
| pl2303_close(port); |
| return -EPROTO; |
| } |
| port->port.drain_delay = 256; |
| return 0; |
| } |
| |
| static int pl2303_tiocmset(struct tty_struct *tty, struct file *file, |
| unsigned int set, unsigned int clear) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| 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 tty_struct *tty, struct file *file) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| 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)", __func__, 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", __func__, result); |
| |
| return result; |
| } |
| |
| static int pl2303_carrier_raised(struct usb_serial_port *port) |
| { |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| if (priv->line_status & UART_DCD) |
| return 1; |
| return 0; |
| } |
| |
| 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 tty_struct *tty, struct file *file, |
| unsigned int cmd, unsigned long arg) |
| { |
| struct serial_struct ser; |
| struct usb_serial_port *port = tty->driver_data; |
| dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd); |
| |
| switch (cmd) { |
| case TIOCGSERIAL: |
| memset(&ser, 0, sizeof ser); |
| ser.type = PORT_16654; |
| ser.line = port->serial->minor; |
| ser.port = port->number; |
| ser.baud_base = 460800; |
| |
| if (copy_to_user((void __user *)arg, &ser, sizeof ser)) |
| return -EFAULT; |
| |
| return 0; |
| |
| case TIOCMIWAIT: |
| dbg("%s (%d) TIOCMIWAIT", __func__, port->number); |
| return wait_modem_info(port, arg); |
| default: |
| dbg("%s not supported = 0x%04x", __func__, cmd); |
| break; |
| } |
| return -ENOIOCTLCMD; |
| } |
| |
| static void pl2303_break_ctl(struct tty_struct *tty, int break_state) |
| { |
| struct usb_serial_port *port = tty->driver_data; |
| struct usb_serial *serial = port->serial; |
| u16 state; |
| int result; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (break_state == 0) |
| state = BREAK_OFF; |
| else |
| state = BREAK_ON; |
| dbg("%s - turning break %s", __func__, |
| 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", __func__, result); |
| } |
| |
| static void pl2303_release(struct usb_serial *serial) |
| { |
| int i; |
| struct pl2303_private *priv; |
| |
| dbg("%s", __func__); |
| |
| 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); |
| } |
| } |
| } |
| |
| 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 + 1; |
| u16 idv, idp; |
| |
| idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); |
| idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); |
| |
| |
| if (idv == SIEMENS_VENDOR_ID) { |
| if (idp == SIEMENS_PRODUCT_ID_X65 || |
| idp == SIEMENS_PRODUCT_ID_SX1 || |
| idp == SIEMENS_PRODUCT_ID_X75) { |
| |
| length = 1; |
| status_idx = 0; |
| } |
| } |
| |
| if (actual_length < length) |
| return; |
| |
| /* 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); |
| if (priv->line_status & UART_BREAK_ERROR) |
| usb_serial_handle_break(port); |
| wake_up_interruptible(&priv->delta_msr_wait); |
| } |
| |
| static void pl2303_read_int_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| unsigned char *data = urb->transfer_buffer; |
| unsigned int actual_length = urb->actual_length; |
| int status = urb->status; |
| int retval; |
| |
| dbg("%s (%d)", __func__, port->number); |
| |
| switch (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", __func__, |
| status); |
| return; |
| default: |
| dbg("%s - nonzero urb status received: %d", __func__, |
| status); |
| goto exit; |
| } |
| |
| usb_serial_debug_data(debug, &port->dev, __func__, |
| urb->actual_length, urb->transfer_buffer); |
| |
| pl2303_update_line_status(port, data, actual_length); |
| |
| exit: |
| retval = usb_submit_urb(urb, GFP_ATOMIC); |
| if (retval) |
| dev_err(&urb->dev->dev, |
| "%s - usb_submit_urb failed with result %d\n", |
| __func__, retval); |
| } |
| |
| static void pl2303_push_data(struct tty_struct *tty, |
| struct usb_serial_port *port, struct urb *urb, |
| u8 line_status) |
| { |
| unsigned char *data = urb->transfer_buffer; |
| /* get tty_flag from status */ |
| char tty_flag = TTY_NORMAL; |
| /* break takes precedence over parity, */ |
| /* which takes precedence over framing errors */ |
| if (line_status & UART_BREAK_ERROR) |
| tty_flag = TTY_BREAK; |
| else if (line_status & UART_PARITY_ERROR) |
| tty_flag = TTY_PARITY; |
| else if (line_status & UART_FRAME_ERROR) |
| tty_flag = TTY_FRAME; |
| dbg("%s - tty_flag = %d", __func__, tty_flag); |
| |
| /* overrun is special, not associated with a char */ |
| if (line_status & UART_OVERRUN_ERROR) |
| tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
| |
| if (tty_flag == TTY_NORMAL && !(port->console && port->sysrq)) |
| tty_insert_flip_string(tty, data, urb->actual_length); |
| else { |
| int i; |
| for (i = 0; i < urb->actual_length; ++i) |
| if (!usb_serial_handle_sysrq_char(tty, port, data[i])) |
| tty_insert_flip_char(tty, data[i], tty_flag); |
| } |
| tty_flip_buffer_push(tty); |
| } |
| |
| static void pl2303_read_bulk_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| struct tty_struct *tty; |
| unsigned long flags; |
| int result; |
| int status = urb->status; |
| u8 line_status; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| if (status) { |
| dbg("%s - urb status = %d", __func__, status); |
| if (status == -EPROTO) { |
| /* PL2303 mysteriously fails with -EPROTO reschedule |
| * the read */ |
| dbg("%s - caught -EPROTO, resubmitting the urb", |
| __func__); |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result) |
| dev_err(&urb->dev->dev, "%s - failed" |
| " resubmitting read urb, error %d\n", |
| __func__, result); |
| return; |
| } |
| dbg("%s - unable to handle the error, exiting.", __func__); |
| return; |
| } |
| |
| usb_serial_debug_data(debug, &port->dev, __func__, |
| urb->actual_length, urb->transfer_buffer); |
| |
| spin_lock_irqsave(&priv->lock, flags); |
| line_status = priv->line_status; |
| priv->line_status &= ~UART_STATE_TRANSIENT_MASK; |
| spin_unlock_irqrestore(&priv->lock, flags); |
| wake_up_interruptible(&priv->delta_msr_wait); |
| |
| tty = tty_port_tty_get(&port->port); |
| if (tty && urb->actual_length) { |
| pl2303_push_data(tty, port, urb, line_status); |
| } |
| tty_kref_put(tty); |
| /* Schedule the next read _if_ we are still open */ |
| result = usb_submit_urb(urb, GFP_ATOMIC); |
| if (result && result != -EPERM) |
| dev_err(&urb->dev->dev, "%s - failed resubmitting" |
| " read urb, error %d\n", __func__, result); |
| } |
| |
| static void pl2303_write_bulk_callback(struct urb *urb) |
| { |
| struct usb_serial_port *port = urb->context; |
| struct pl2303_private *priv = usb_get_serial_port_data(port); |
| int result; |
| int status = urb->status; |
| |
| dbg("%s - port %d", __func__, port->number); |
| |
| switch (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", __func__, |
| status); |
| priv->write_urb_in_use = 0; |
| return; |
| default: |
| /* error in the urb, so we have to resubmit it */ |
| dbg("%s - Overflow in write", __func__); |
| dbg("%s - nonzero write bulk status received: %d", __func__, |
| status); |
| port->write_urb->transfer_buffer_length = 1; |
| result = usb_submit_urb(port->write_urb, GFP_ATOMIC); |
| if (result) |
| dev_err(&urb->dev->dev, "%s - failed resubmitting write" |
| " urb, error %d\n", __func__, result); |
| else |
| return; |
| } |
| |
| priv->write_urb_in_use = 0; |
| |
| /* send any buffered data */ |
| pl2303_send(port); |
| } |
| |
| /* All of the device info needed for the PL2303 SIO serial converter */ |
| static struct usb_serial_driver pl2303_device = { |
| .driver = { |
| .owner = THIS_MODULE, |
| .name = "pl2303", |
| }, |
| .id_table = id_table, |
| .usb_driver = &pl2303_driver, |
| .num_ports = 1, |
| .open = pl2303_open, |
| .close = pl2303_close, |
| .dtr_rts = pl2303_dtr_rts, |
| .carrier_raised = pl2303_carrier_raised, |
| .write = pl2303_write, |
| .ioctl = pl2303_ioctl, |
| .break_ctl = pl2303_break_ctl, |
| .set_termios = pl2303_set_termios, |
| .tiocmget = pl2303_tiocmget, |
| .tiocmset = pl2303_tiocmset, |
| .read_bulk_callback = pl2303_read_bulk_callback, |
| .read_int_callback = pl2303_read_int_callback, |
| .write_bulk_callback = pl2303_write_bulk_callback, |
| .write_room = pl2303_write_room, |
| .chars_in_buffer = pl2303_chars_in_buffer, |
| .attach = pl2303_startup, |
| .release = pl2303_release, |
| }; |
| |
| 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; |
| printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); |
| 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_LICENSE("GPL"); |
| |
| module_param(debug, bool, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(debug, "Debug enabled or not"); |
| |