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Rev | Author | Line No. | Line |
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1049 | mauro | 1 | /* |
2 | * Prolific PL2303 USB to serial adaptor driver |
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3 | * |
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4 | * Copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com) |
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5 | * Copyright (C) 2003 IBM Corp. |
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6 | * |
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7 | * Original driver for 2.2.x by anonymous |
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8 | * |
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9 | * This program is free software; you can redistribute it and/or modify |
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10 | * it under the terms of the GNU General Public License as published by |
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11 | * the Free Software Foundation; either version 2 of the License, or |
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12 | * (at your option) any later version. |
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13 | * |
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14 | * See Documentation/usb/usb-serial.txt for more information on using this driver |
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15 | * |
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16 | * 2002_Mar_26 gkh |
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17 | * allowed driver to work properly if there is no tty assigned to a port |
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18 | * (this happens for serial console devices.) |
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19 | * |
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20 | * 2001_Oct_06 gkh |
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21 | * Added RTS and DTR line control. Thanks to joe@bndlg.de for parts of it. |
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22 | * |
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23 | * 2001_Sep_19 gkh |
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24 | * Added break support. |
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25 | * |
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26 | * 2001_Aug_30 gkh |
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27 | * fixed oops in write_bulk_callback. |
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28 | * |
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29 | * 2001_Aug_28 gkh |
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30 | * reworked buffer logic to be like other usb-serial drivers. Hopefully |
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31 | * removing some reported problems. |
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32 | * |
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33 | * 2001_Jun_06 gkh |
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34 | * finished porting to 2.4 format. |
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35 | * |
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36 | */ |
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37 | |||
38 | #include <linuxcomp.h> |
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39 | |||
40 | #include <linux/config.h> |
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41 | #include <linux/kernel.h> |
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42 | #include <linux/errno.h> |
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43 | #include <linux/init.h> |
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44 | #include <linux/slab.h> |
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45 | #include <linux/tty.h> |
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46 | #include <linux/tty_driver.h> |
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47 | #include <linux/tty_flip.h> |
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48 | #include <linux/serial.h> |
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49 | #include <linux/module.h> |
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50 | #include <linux/spinlock.h> |
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51 | #include <asm/uaccess.h> |
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52 | #include <linux/usb.h> |
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53 | |||
54 | #ifdef CONFIG_USB_SERIAL_DEBUG |
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55 | static int debug = 1; |
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56 | #else |
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57 | static int debug; |
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58 | #endif |
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59 | |||
60 | #include "usb-serial.h" |
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61 | #include "pl2303.h" |
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62 | |||
63 | /* |
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64 | * Version Information |
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65 | */ |
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66 | #define DRIVER_VERSION "v0.10" |
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67 | #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" |
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68 | |||
69 | |||
70 | |||
71 | static struct usb_device_id id_table [] = { |
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72 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, |
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73 | { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, |
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74 | { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, |
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75 | { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, |
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76 | { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, |
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77 | { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, |
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78 | { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, |
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79 | { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, |
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80 | { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, |
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81 | { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, |
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82 | { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, |
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83 | { } /* Terminating entry */ |
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84 | }; |
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85 | |||
86 | MODULE_DEVICE_TABLE (usb, id_table); |
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87 | |||
88 | static struct usb_driver pl2303_driver = { |
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89 | .owner = THIS_MODULE, |
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90 | .name = "pl2303", |
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91 | .probe = usb_serial_probe, |
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92 | .disconnect = usb_serial_disconnect, |
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93 | .id_table = id_table, |
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94 | }; |
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95 | |||
96 | #define SET_LINE_REQUEST_TYPE 0x21 |
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97 | #define SET_LINE_REQUEST 0x20 |
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98 | |||
99 | #define SET_CONTROL_REQUEST_TYPE 0x21 |
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100 | #define SET_CONTROL_REQUEST 0x22 |
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101 | #define CONTROL_DTR 0x01 |
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102 | #define CONTROL_RTS 0x02 |
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103 | |||
104 | #define BREAK_REQUEST_TYPE 0x21 |
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105 | #define BREAK_REQUEST 0x23 |
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106 | #define BREAK_ON 0xffff |
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107 | #define BREAK_OFF 0x0000 |
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108 | |||
109 | #define GET_LINE_REQUEST_TYPE 0xa1 |
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110 | #define GET_LINE_REQUEST 0x21 |
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111 | |||
112 | #define VENDOR_WRITE_REQUEST_TYPE 0x40 |
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113 | #define VENDOR_WRITE_REQUEST 0x01 |
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114 | |||
115 | #define VENDOR_READ_REQUEST_TYPE 0xc0 |
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116 | #define VENDOR_READ_REQUEST 0x01 |
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117 | |||
118 | #define UART_STATE 0x08 |
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119 | #define UART_DCD 0x01 |
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120 | #define UART_DSR 0x02 |
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121 | #define UART_BREAK_ERROR 0x04 |
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122 | #define UART_RING 0x08 |
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123 | #define UART_FRAME_ERROR 0x10 |
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124 | #define UART_PARITY_ERROR 0x20 |
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125 | #define UART_OVERRUN_ERROR 0x40 |
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126 | #define UART_CTS 0x80 |
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127 | |||
128 | /* function prototypes for a PL2303 serial converter */ |
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129 | static int pl2303_open (struct usb_serial_port *port, struct file *filp); |
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130 | static void pl2303_close (struct usb_serial_port *port, struct file *filp); |
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131 | static void pl2303_set_termios (struct usb_serial_port *port, |
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132 | struct termios *old); |
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133 | static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, |
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134 | unsigned int cmd, unsigned long arg); |
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135 | static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); |
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136 | static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); |
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137 | static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); |
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138 | static int pl2303_write (struct usb_serial_port *port, int from_user, |
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139 | const unsigned char *buf, int count); |
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140 | static void pl2303_break_ctl(struct usb_serial_port *port,int break_state); |
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141 | static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); |
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142 | static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
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143 | unsigned int set, unsigned int clear); |
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144 | static int pl2303_startup (struct usb_serial *serial); |
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145 | static void pl2303_shutdown (struct usb_serial *serial); |
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146 | |||
147 | |||
148 | /* All of the device info needed for the PL2303 SIO serial converter */ |
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149 | static struct usb_serial_device_type pl2303_device = { |
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150 | .owner = THIS_MODULE, |
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151 | .name = "PL-2303", |
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152 | .id_table = id_table, |
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153 | .num_interrupt_in = NUM_DONT_CARE, |
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154 | .num_bulk_in = 1, |
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155 | .num_bulk_out = 1, |
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156 | .num_ports = 1, |
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157 | .open = pl2303_open, |
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158 | .close = pl2303_close, |
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159 | .write = pl2303_write, |
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160 | .ioctl = pl2303_ioctl, |
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161 | .break_ctl = pl2303_break_ctl, |
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162 | .set_termios = pl2303_set_termios, |
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163 | .tiocmget = pl2303_tiocmget, |
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164 | .tiocmset = pl2303_tiocmset, |
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165 | .read_bulk_callback = pl2303_read_bulk_callback, |
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166 | .read_int_callback = pl2303_read_int_callback, |
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167 | .write_bulk_callback = pl2303_write_bulk_callback, |
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168 | .attach = pl2303_startup, |
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169 | .shutdown = pl2303_shutdown, |
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170 | }; |
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171 | |||
172 | struct pl2303_private { |
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173 | spinlock_t lock; |
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174 | u8 line_control; |
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175 | u8 line_status; |
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176 | u8 termios_initialized; |
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177 | }; |
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178 | |||
179 | |||
180 | static int pl2303_startup (struct usb_serial *serial) |
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181 | { |
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182 | struct pl2303_private *priv; |
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183 | int i; |
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184 | |||
185 | for (i = 0; i < serial->num_ports; ++i) { |
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186 | priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL); |
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187 | if (!priv) |
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188 | return -ENOMEM; |
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189 | memset (priv, 0x00, sizeof (struct pl2303_private)); |
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190 | spin_lock_init(&priv->lock); |
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191 | usb_set_serial_port_data(serial->port[i], priv); |
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192 | } |
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193 | return 0; |
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194 | } |
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195 | |||
196 | static int set_control_lines (struct usb_device *dev, u8 value) |
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197 | { |
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198 | int retval; |
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199 | |||
200 | retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0), |
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201 | SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, |
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202 | value, 0, NULL, 0, 100); |
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203 | dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval); |
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204 | return retval; |
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205 | } |
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206 | |||
207 | static int pl2303_write (struct usb_serial_port *port, int from_user, const unsigned char *buf, int count) |
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208 | { |
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209 | int result; |
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210 | |||
211 | dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); |
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212 | |||
213 | if (port->write_urb->status == -EINPROGRESS) { |
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214 | dbg("%s - already writing", __FUNCTION__); |
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215 | return 0; |
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216 | } |
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217 | |||
218 | count = (count > port->bulk_out_size) ? port->bulk_out_size : count; |
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219 | if (from_user) { |
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220 | if (copy_from_user (port->write_urb->transfer_buffer, buf, count)) |
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221 | return -EFAULT; |
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222 | } else { |
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223 | memcpy (port->write_urb->transfer_buffer, buf, count); |
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224 | } |
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225 | |||
226 | usb_serial_debug_data (__FILE__, __FUNCTION__, count, port->write_urb->transfer_buffer); |
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227 | |||
228 | port->write_urb->transfer_buffer_length = count; |
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229 | port->write_urb->dev = port->serial->dev; |
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230 | result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
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231 | if (result) |
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232 | dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); |
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233 | else |
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234 | result = count; |
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235 | |||
236 | return result; |
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237 | } |
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238 | |||
239 | |||
240 | |||
241 | static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) |
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242 | { |
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243 | struct usb_serial *serial = port->serial; |
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244 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
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245 | unsigned long flags; |
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246 | unsigned int cflag; |
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247 | unsigned char *buf; |
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248 | int baud; |
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249 | int i; |
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250 | u8 control; |
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251 | |||
252 | dbg("%s - port %d", __FUNCTION__, port->number); |
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253 | |||
254 | if ((!port->tty) || (!port->tty->termios)) { |
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255 | dbg("%s - no tty structures", __FUNCTION__); |
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256 | return; |
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257 | } |
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258 | |||
259 | spin_lock_irqsave(&priv->lock, flags); |
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260 | |||
261 | if (!priv->termios_initialized) { |
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262 | *(port->tty->termios) = tty_std_termios; |
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263 | port->tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; |
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264 | priv->termios_initialized = 1; |
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265 | } |
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266 | |||
267 | spin_unlock_irqrestore(&priv->lock, flags); |
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268 | |||
269 | cflag = port->tty->termios->c_cflag; |
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270 | /* check that they really want us to change something */ |
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271 | if (old_termios) { |
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272 | if ((cflag == old_termios->c_cflag) && |
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273 | (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { |
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274 | dbg("%s - nothing to change...", __FUNCTION__); |
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275 | return; |
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276 | } |
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277 | } |
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278 | |||
279 | buf = kmalloc (7, GFP_KERNEL); |
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280 | if (!buf) { |
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281 | dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); |
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282 | return; |
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283 | } |
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284 | memset (buf, 0x00, 0x07); |
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285 | |||
286 | i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), |
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287 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, |
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288 | 0, 0, buf, 7, 100); |
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289 | dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, |
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290 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
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291 | |||
292 | |||
293 | if (cflag & CSIZE) { |
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294 | switch (cflag & CSIZE) { |
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295 | case CS5: buf[6] = 5; break; |
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296 | case CS6: buf[6] = 6; break; |
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297 | case CS7: buf[6] = 7; break; |
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298 | default: |
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299 | case CS8: buf[6] = 8; break; |
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300 | } |
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301 | dbg("%s - data bits = %d", __FUNCTION__, buf[6]); |
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302 | } |
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303 | |||
304 | baud = 0; |
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305 | switch (cflag & CBAUD) { |
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306 | case B0: baud = 0; break; |
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307 | case B75: baud = 75; break; |
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308 | case B150: baud = 150; break; |
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309 | case B300: baud = 300; break; |
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310 | case B600: baud = 600; break; |
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311 | case B1200: baud = 1200; break; |
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312 | case B1800: baud = 1800; break; |
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313 | case B2400: baud = 2400; break; |
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314 | case B4800: baud = 4800; break; |
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315 | case B9600: baud = 9600; break; |
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316 | case B19200: baud = 19200; break; |
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317 | case B38400: baud = 38400; break; |
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318 | case B57600: baud = 57600; break; |
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319 | case B115200: baud = 115200; break; |
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320 | case B230400: baud = 230400; break; |
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321 | case B460800: baud = 460800; break; |
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322 | default: |
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323 | dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); |
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324 | break; |
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325 | } |
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326 | dbg("%s - baud = %d", __FUNCTION__, baud); |
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327 | if (baud) { |
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328 | buf[0] = baud & 0xff; |
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329 | buf[1] = (baud >> 8) & 0xff; |
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330 | buf[2] = (baud >> 16) & 0xff; |
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331 | buf[3] = (baud >> 24) & 0xff; |
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332 | } |
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333 | |||
334 | /* For reference buf[4]=0 is 1 stop bits */ |
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335 | /* For reference buf[4]=1 is 1.5 stop bits */ |
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336 | /* For reference buf[4]=2 is 2 stop bits */ |
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337 | if (cflag & CSTOPB) { |
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338 | buf[4] = 2; |
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339 | dbg("%s - stop bits = 2", __FUNCTION__); |
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340 | } else { |
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341 | buf[4] = 0; |
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342 | dbg("%s - stop bits = 1", __FUNCTION__); |
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343 | } |
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344 | |||
345 | if (cflag & PARENB) { |
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346 | /* For reference buf[5]=0 is none parity */ |
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347 | /* For reference buf[5]=1 is odd parity */ |
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348 | /* For reference buf[5]=2 is even parity */ |
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349 | /* For reference buf[5]=3 is mark parity */ |
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350 | /* For reference buf[5]=4 is space parity */ |
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351 | if (cflag & PARODD) { |
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352 | buf[5] = 1; |
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353 | dbg("%s - parity = odd", __FUNCTION__); |
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354 | } else { |
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355 | buf[5] = 2; |
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356 | dbg("%s - parity = even", __FUNCTION__); |
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357 | } |
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358 | } else { |
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359 | buf[5] = 0; |
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360 | dbg("%s - parity = none", __FUNCTION__); |
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361 | } |
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362 | |||
363 | i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
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364 | SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, |
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365 | 0, 0, buf, 7, 100); |
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366 | dbg ("0x21:0x20:0:0 %d", i); |
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367 | |||
368 | /* change control lines if we are switching to or from B0 */ |
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369 | spin_lock_irqsave(&priv->lock, flags); |
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370 | control = priv->line_control; |
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371 | if ((cflag & CBAUD) == B0) |
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372 | priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); |
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373 | else |
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374 | priv->line_control |= (CONTROL_DTR | CONTROL_RTS); |
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375 | if (control != priv->line_control) { |
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376 | control = priv->line_control; |
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377 | spin_unlock_irqrestore(&priv->lock, flags); |
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378 | set_control_lines(serial->dev, control); |
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379 | } else { |
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380 | spin_unlock_irqrestore(&priv->lock, flags); |
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381 | } |
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382 | |||
383 | buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; |
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384 | |||
385 | i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), |
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386 | GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, |
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387 | 0, 0, buf, 7, 100); |
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388 | dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, |
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389 | buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); |
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390 | |||
391 | if (cflag & CRTSCTS) { |
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392 | i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
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393 | VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, |
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394 | 0x0, 0x41, NULL, 0, 100); |
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395 | dbg ("0x40:0x1:0x0:0x41 %d", i); |
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396 | } |
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397 | |||
398 | kfree (buf); |
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399 | } |
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400 | |||
401 | |||
402 | static int pl2303_open (struct usb_serial_port *port, struct file *filp) |
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403 | { |
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404 | struct termios tmp_termios; |
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405 | struct usb_serial *serial = port->serial; |
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406 | unsigned char buf[10]; |
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407 | int result; |
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408 | |||
409 | if (port_paranoia_check (port, __FUNCTION__)) |
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410 | return -ENODEV; |
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411 | |||
412 | dbg("%s - port %d", __FUNCTION__, port->number); |
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413 | |||
414 | usb_clear_halt(serial->dev, port->write_urb->pipe); |
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415 | usb_clear_halt(serial->dev, port->read_urb->pipe); |
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416 | |||
417 | #define FISH(a,b,c,d) \ |
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418 | result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ |
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419 | b, a, c, d, buf, 1, 100); \ |
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420 | dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); |
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421 | |||
422 | #define SOUP(a,b,c,d) \ |
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423 | result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ |
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424 | b, a, c, d, NULL, 0, 100); \ |
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425 | dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); |
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426 | |||
427 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
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428 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); |
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429 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
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430 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
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431 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
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432 | SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); |
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433 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); |
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434 | FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); |
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435 | |||
436 | /* Setup termios */ |
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437 | if (port->tty) { |
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438 | pl2303_set_termios (port, &tmp_termios); |
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439 | } |
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440 | |||
441 | //FIXME: need to assert RTS and DTR if CRTSCTS off |
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442 | |||
443 | dbg("%s - submitting read urb", __FUNCTION__); |
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444 | port->read_urb->dev = serial->dev; |
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445 | result = usb_submit_urb (port->read_urb, GFP_KERNEL); |
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446 | if (result) { |
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447 | dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); |
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448 | pl2303_close (port, NULL); |
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449 | return -EPROTO; |
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450 | } |
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451 | |||
452 | dbg("%s - submitting interrupt urb", __FUNCTION__); |
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453 | port->interrupt_in_urb->dev = serial->dev; |
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454 | result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); |
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455 | if (result) { |
||
456 | dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); |
||
457 | pl2303_close (port, NULL); |
||
458 | return -EPROTO; |
||
459 | } |
||
460 | return 0; |
||
461 | } |
||
462 | |||
463 | |||
464 | static void pl2303_close (struct usb_serial_port *port, struct file *filp) |
||
465 | { |
||
466 | struct usb_serial *serial; |
||
467 | struct pl2303_private *priv; |
||
468 | unsigned long flags; |
||
469 | unsigned int c_cflag; |
||
470 | int result; |
||
471 | |||
472 | if (port_paranoia_check (port, __FUNCTION__)) |
||
473 | return; |
||
474 | serial = get_usb_serial (port, __FUNCTION__); |
||
475 | if (!serial) |
||
476 | return; |
||
477 | |||
478 | dbg("%s - port %d", __FUNCTION__, port->number); |
||
479 | |||
480 | /* shutdown our urbs */ |
||
481 | dbg("%s - shutting down urbs", __FUNCTION__); |
||
482 | result = usb_unlink_urb (port->write_urb); |
||
483 | if (result) |
||
484 | dbg("%s - usb_unlink_urb (write_urb)" |
||
485 | " failed with reason: %d", __FUNCTION__, |
||
486 | result); |
||
487 | |||
488 | result = usb_unlink_urb (port->read_urb); |
||
489 | if (result) |
||
490 | dbg("%s - usb_unlink_urb (read_urb) " |
||
491 | "failed with reason: %d", __FUNCTION__, |
||
492 | result); |
||
493 | |||
494 | result = usb_unlink_urb (port->interrupt_in_urb); |
||
495 | if (result) |
||
496 | dbg("%s - usb_unlink_urb (interrupt_in_urb)" |
||
497 | " failed with reason: %d", __FUNCTION__, |
||
498 | result); |
||
499 | |||
500 | if (port->tty) { |
||
501 | c_cflag = port->tty->termios->c_cflag; |
||
502 | if (c_cflag & HUPCL) { |
||
503 | /* drop DTR and RTS */ |
||
504 | priv = usb_get_serial_port_data(port); |
||
505 | spin_lock_irqsave(&priv->lock, flags); |
||
506 | priv->line_control = 0; |
||
507 | spin_unlock_irqrestore (&priv->lock, flags); |
||
508 | set_control_lines (port->serial->dev, 0); |
||
509 | } |
||
510 | } |
||
511 | |||
512 | } |
||
513 | |||
514 | static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, |
||
515 | unsigned int set, unsigned int clear) |
||
516 | { |
||
517 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
||
518 | unsigned long flags; |
||
519 | u8 control; |
||
520 | |||
521 | spin_lock_irqsave (&priv->lock, flags); |
||
522 | if (set & TIOCM_RTS) |
||
523 | priv->line_control |= CONTROL_RTS; |
||
524 | if (set & TIOCM_DTR) |
||
525 | priv->line_control |= CONTROL_DTR; |
||
526 | if (clear & TIOCM_RTS) |
||
527 | priv->line_control &= ~CONTROL_RTS; |
||
528 | if (clear & TIOCM_DTR) |
||
529 | priv->line_control &= ~CONTROL_DTR; |
||
530 | control = priv->line_control; |
||
531 | spin_unlock_irqrestore (&priv->lock, flags); |
||
532 | |||
533 | return set_control_lines (port->serial->dev, control); |
||
534 | } |
||
535 | |||
536 | static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) |
||
537 | { |
||
538 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
||
539 | unsigned long flags; |
||
540 | unsigned int mcr; |
||
541 | unsigned int status; |
||
542 | unsigned int result; |
||
543 | |||
544 | dbg("%s (%d)", __FUNCTION__, port->number); |
||
545 | |||
546 | spin_lock_irqsave (&priv->lock, flags); |
||
547 | mcr = priv->line_control; |
||
548 | status = priv->line_status; |
||
549 | spin_unlock_irqrestore (&priv->lock, flags); |
||
550 | |||
551 | result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) |
||
552 | | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) |
||
553 | | ((status & UART_CTS) ? TIOCM_CTS : 0) |
||
554 | | ((status & UART_DSR) ? TIOCM_DSR : 0) |
||
555 | | ((status & UART_RING) ? TIOCM_RI : 0) |
||
556 | | ((status & UART_DCD) ? TIOCM_CD : 0); |
||
557 | |||
558 | dbg("%s - result = %x", __FUNCTION__, result); |
||
559 | |||
560 | return result; |
||
561 | } |
||
562 | |||
563 | static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) |
||
564 | { |
||
565 | dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); |
||
566 | |||
567 | switch (cmd) { |
||
568 | default: |
||
569 | dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); |
||
570 | break; |
||
571 | } |
||
572 | |||
573 | return -ENOIOCTLCMD; |
||
574 | } |
||
575 | |||
576 | static void pl2303_break_ctl (struct usb_serial_port *port, int break_state) |
||
577 | { |
||
578 | struct usb_serial *serial = port->serial; |
||
579 | u16 state; |
||
580 | int result; |
||
581 | |||
582 | dbg("%s - port %d", __FUNCTION__, port->number); |
||
583 | |||
584 | if (break_state == 0) |
||
585 | state = BREAK_OFF; |
||
586 | else |
||
587 | state = BREAK_ON; |
||
588 | dbg("%s - turning break %s", state==BREAK_OFF ? "off" : "on", __FUNCTION__); |
||
589 | |||
590 | result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), |
||
591 | BREAK_REQUEST, BREAK_REQUEST_TYPE, state, |
||
592 | 0, NULL, 0, 100); |
||
593 | if (result) |
||
594 | dbg("%s - error sending break = %d", __FUNCTION__, result); |
||
595 | } |
||
596 | |||
597 | |||
598 | static void pl2303_shutdown (struct usb_serial *serial) |
||
599 | { |
||
600 | int i; |
||
601 | |||
602 | dbg("%s", __FUNCTION__); |
||
603 | |||
604 | for (i = 0; i < serial->num_ports; ++i) { |
||
605 | kfree (usb_get_serial_port_data(serial->port[i])); |
||
606 | usb_set_serial_port_data(serial->port[i], NULL); |
||
607 | } |
||
608 | } |
||
609 | |||
610 | |||
611 | static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) |
||
612 | { |
||
613 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
||
614 | struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
||
615 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
||
616 | unsigned char *data = urb->transfer_buffer; |
||
617 | unsigned long flags; |
||
618 | int status; |
||
619 | |||
620 | dbg("%s (%d)", __FUNCTION__, port->number); |
||
621 | |||
622 | switch (urb->status) { |
||
623 | case 0: |
||
624 | /* success */ |
||
625 | break; |
||
626 | case -ECONNRESET: |
||
627 | case -ENOENT: |
||
628 | case -ESHUTDOWN: |
||
629 | /* this urb is terminated, clean up */ |
||
630 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); |
||
631 | return; |
||
632 | default: |
||
633 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); |
||
634 | goto exit; |
||
635 | } |
||
636 | |||
637 | if (!serial) { |
||
638 | return; |
||
639 | } |
||
640 | |||
641 | usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, urb->transfer_buffer); |
||
642 | |||
643 | if (urb->actual_length < UART_STATE) |
||
644 | goto exit; |
||
645 | |||
646 | /* Save off the uart status for others to look at */ |
||
647 | spin_lock_irqsave(&priv->lock, flags); |
||
648 | priv->line_status = data[UART_STATE]; |
||
649 | spin_unlock_irqrestore(&priv->lock, flags); |
||
650 | |||
651 | exit: |
||
652 | status = usb_submit_urb (urb, GFP_ATOMIC); |
||
653 | if (status) |
||
654 | dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", |
||
655 | __FUNCTION__, status); |
||
656 | } |
||
657 | |||
658 | |||
659 | static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) |
||
660 | { |
||
661 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
||
662 | struct usb_serial *serial = get_usb_serial (port, __FUNCTION__); |
||
663 | struct pl2303_private *priv = usb_get_serial_port_data(port); |
||
664 | struct tty_struct *tty; |
||
665 | unsigned char *data = urb->transfer_buffer; |
||
666 | unsigned long flags; |
||
667 | int i; |
||
668 | int result; |
||
669 | u8 status; |
||
670 | char tty_flag; |
||
671 | |||
672 | if (port_paranoia_check (port, __FUNCTION__)) |
||
673 | return; |
||
674 | |||
675 | dbg("%s - port %d", __FUNCTION__, port->number); |
||
676 | |||
677 | if (!serial) { |
||
678 | dbg("%s - bad serial pointer, exiting", __FUNCTION__); |
||
679 | return; |
||
680 | } |
||
681 | |||
682 | |||
683 | if (urb->status) { |
||
684 | dbg("%s - urb->status = %d", __FUNCTION__, urb->status); |
||
685 | if (!port->open_count) { |
||
686 | dbg("%s - port is closed, exiting.", __FUNCTION__); |
||
687 | return; |
||
688 | } |
||
689 | if (urb->status == -EPROTO) { |
||
690 | /* PL2303 mysteriously fails with -EPROTO reschedule the read */ |
||
691 | dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); |
||
692 | urb->status = 0; |
||
693 | urb->dev = serial->dev; |
||
694 | result = usb_submit_urb(urb, GFP_ATOMIC); |
||
695 | if (result) |
||
696 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
||
697 | return; |
||
698 | } |
||
699 | dbg("%s - unable to handle the error, exiting.", __FUNCTION__); |
||
700 | return; |
||
701 | } |
||
702 | |||
703 | usb_serial_debug_data (__FILE__, __FUNCTION__, urb->actual_length, data); |
||
704 | |||
705 | /* get tty_flag from status */ |
||
706 | tty_flag = TTY_NORMAL; |
||
707 | |||
708 | spin_lock_irqsave(&priv->lock, flags); |
||
709 | status = priv->line_status; |
||
710 | spin_unlock_irqrestore(&priv->lock, flags); |
||
711 | |||
712 | /* break takes precedence over parity, */ |
||
713 | /* which takes precedence over framing errors */ |
||
714 | if (status & UART_BREAK_ERROR ) |
||
715 | tty_flag = TTY_BREAK; |
||
716 | else if (status & UART_PARITY_ERROR) |
||
717 | tty_flag = TTY_PARITY; |
||
718 | else if (status & UART_FRAME_ERROR) |
||
719 | tty_flag = TTY_FRAME; |
||
720 | dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); |
||
721 | |||
722 | tty = port->tty; |
||
723 | if (tty && urb->actual_length) { |
||
724 | /* overrun is special, not associated with a char */ |
||
725 | if (status & UART_OVERRUN_ERROR) |
||
726 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
||
727 | for (i = 0; i < urb->actual_length; ++i) { |
||
728 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { |
||
729 | tty_flip_buffer_push(tty); |
||
730 | } |
||
731 | //**#ifdef DEBUG_ME |
||
732 | tty_insert_flip_char (tty, data[i], tty_flag); |
||
733 | //**#endif /* DEBUG_ME */ |
||
734 | } |
||
735 | tty_flip_buffer_push (tty); |
||
736 | } |
||
737 | |||
738 | |||
739 | /* Schedule the next read _if_ we are still open */ |
||
740 | if (port->open_count) { |
||
741 | urb->dev = serial->dev; |
||
742 | result = usb_submit_urb(urb, GFP_ATOMIC); |
||
743 | if (result) |
||
744 | dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); |
||
745 | } |
||
746 | |||
747 | |||
748 | return; |
||
749 | } |
||
750 | |||
751 | |||
752 | |||
753 | static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) |
||
754 | { |
||
755 | struct usb_serial_port *port = (struct usb_serial_port *) urb->context; |
||
756 | int result; |
||
757 | |||
758 | if (port_paranoia_check (port, __FUNCTION__)) |
||
759 | return; |
||
760 | |||
761 | dbg("%s - port %d", __FUNCTION__, port->number); |
||
762 | |||
763 | if (urb->status) { |
||
764 | /* error in the urb, so we have to resubmit it */ |
||
765 | if (serial_paranoia_check (port->serial, __FUNCTION__)) { |
||
766 | return; |
||
767 | } |
||
768 | dbg("%s - Overflow in write", __FUNCTION__); |
||
769 | dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); |
||
770 | port->write_urb->transfer_buffer_length = 1; |
||
771 | port->write_urb->dev = port->serial->dev; |
||
772 | result = usb_submit_urb (port->write_urb, GFP_ATOMIC); |
||
773 | if (result) |
||
774 | dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); |
||
775 | |||
776 | return; |
||
777 | } |
||
778 | |||
779 | schedule_work(&port->work); |
||
780 | } |
||
781 | |||
782 | |||
783 | /*static*/ int __init pl2303_init (void) |
||
784 | { |
||
785 | int retval; |
||
786 | retval = usb_serial_register(&pl2303_device); |
||
787 | if (retval) |
||
788 | goto failed_usb_serial_register; |
||
789 | retval = usb_register(&pl2303_driver); |
||
790 | if (retval) |
||
791 | goto failed_usb_register; |
||
792 | info(DRIVER_DESC " " DRIVER_VERSION); |
||
793 | return 0; |
||
794 | failed_usb_register: |
||
795 | usb_serial_deregister(&pl2303_device); |
||
796 | failed_usb_serial_register: |
||
797 | return retval; |
||
798 | } |
||
799 | |||
800 | |||
801 | /*static*/ void __exit pl2303_exit (void) |
||
802 | { |
||
803 | usb_deregister (&pl2303_driver); |
||
804 | usb_serial_deregister (&pl2303_device); |
||
805 | } |
||
806 | |||
807 | |||
808 | module_init(pl2303_init); |
||
809 | module_exit(pl2303_exit); |
||
810 | |||
811 | MODULE_DESCRIPTION(DRIVER_DESC); |
||
812 | MODULE_LICENSE("GPL"); |
||
813 | |||
814 | MODULE_PARM(debug, "i"); |
||
815 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |
||
816 |