1 | #include <machine/rtems-bsd-kernel-space.h> |
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2 | |
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3 | /*- |
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4 | * Copyright (c) 2004 Bernd Walter <ticso@FreeBSD.org> |
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5 | * |
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6 | * $URL: https://devel.bwct.de/svn/projects/ubser/ubser.c $ |
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7 | * $Date: 2004-02-29 01:53:10 +0100 (Sun, 29 Feb 2004) $ |
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8 | * $Author: ticso $ |
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9 | * $Rev: 1127 $ |
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10 | */ |
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11 | |
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12 | /*- |
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13 | * Copyright (c) 2001-2002, Shunsuke Akiyama <akiyama@jp.FreeBSD.org>. |
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14 | * All rights reserved. |
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15 | * |
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16 | * Redistribution and use in source and binary forms, with or without |
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17 | * modification, are permitted provided that the following conditions |
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18 | * are met: |
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19 | * 1. Redistributions of source code must retain the above copyright |
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20 | * notice, this list of conditions and the following disclaimer. |
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21 | * 2. Redistributions in binary form must reproduce the above copyright |
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22 | * notice, this list of conditions and the following disclaimer in the |
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23 | * documentation and/or other materials provided with the distribution. |
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24 | * |
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25 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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27 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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28 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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29 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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30 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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31 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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32 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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33 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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34 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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35 | * SUCH DAMAGE. |
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36 | */ |
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37 | |
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38 | /*- |
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39 | * Copyright (c) 2000 The NetBSD Foundation, Inc. |
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40 | * All rights reserved. |
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41 | * |
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42 | * This code is derived from software contributed to The NetBSD Foundation |
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43 | * by Lennart Augustsson (lennart@augustsson.net). |
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44 | * |
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45 | * Redistribution and use in source and binary forms, with or without |
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46 | * modification, are permitted provided that the following conditions |
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47 | * are met: |
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48 | * 1. Redistributions of source code must retain the above copyright |
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49 | * notice, this list of conditions and the following disclaimer. |
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50 | * 2. Redistributions in binary form must reproduce the above copyright |
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51 | * notice, this list of conditions and the following disclaimer in the |
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52 | * documentation and/or other materials provided with the distribution. |
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53 | * |
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54 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
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55 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
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56 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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57 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
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58 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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59 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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60 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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61 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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62 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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63 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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64 | * POSSIBILITY OF SUCH DAMAGE. |
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65 | */ |
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66 | |
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67 | #include <sys/cdefs.h> |
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68 | __FBSDID("$FreeBSD$"); |
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69 | |
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70 | /* |
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71 | * BWCT serial adapter driver |
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72 | */ |
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73 | |
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74 | #include <sys/stdint.h> |
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75 | #include <sys/stddef.h> |
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76 | #include <rtems/bsd/sys/param.h> |
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77 | #include <sys/queue.h> |
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78 | #include <sys/types.h> |
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79 | #include <sys/systm.h> |
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80 | #include <sys/kernel.h> |
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81 | #include <sys/bus.h> |
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82 | #include <sys/module.h> |
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83 | #include <rtems/bsd/sys/lock.h> |
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84 | #include <sys/mutex.h> |
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85 | #include <sys/condvar.h> |
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86 | #include <sys/sysctl.h> |
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87 | #include <sys/sx.h> |
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88 | #include <rtems/bsd/sys/unistd.h> |
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89 | #include <sys/callout.h> |
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90 | #include <sys/malloc.h> |
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91 | #include <sys/priv.h> |
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92 | |
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93 | #include <dev/usb/usb.h> |
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94 | #include <dev/usb/usbdi.h> |
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95 | #include <dev/usb/usbdi_util.h> |
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96 | #include <rtems/bsd/local/usbdevs.h> |
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97 | |
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98 | #define USB_DEBUG_VAR ubser_debug |
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99 | #include <dev/usb/usb_debug.h> |
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100 | #include <dev/usb/usb_process.h> |
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101 | |
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102 | #include <dev/usb/serial/usb_serial.h> |
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103 | |
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104 | #define UBSER_UNIT_MAX 32 |
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105 | |
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106 | /* Vendor Interface Requests */ |
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107 | #define VENDOR_GET_NUMSER 0x01 |
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108 | #define VENDOR_SET_BREAK 0x02 |
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109 | #define VENDOR_CLEAR_BREAK 0x03 |
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110 | |
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111 | #ifdef USB_DEBUG |
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112 | static int ubser_debug = 0; |
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113 | |
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114 | static SYSCTL_NODE(_hw_usb, OID_AUTO, ubser, CTLFLAG_RW, 0, "USB ubser"); |
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115 | SYSCTL_INT(_hw_usb_ubser, OID_AUTO, debug, CTLFLAG_RWTUN, |
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116 | &ubser_debug, 0, "ubser debug level"); |
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117 | #endif |
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118 | |
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119 | enum { |
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120 | UBSER_BULK_DT_WR, |
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121 | UBSER_BULK_DT_RD, |
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122 | UBSER_N_TRANSFER, |
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123 | }; |
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124 | |
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125 | struct ubser_softc { |
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126 | struct ucom_super_softc sc_super_ucom; |
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127 | struct ucom_softc sc_ucom[UBSER_UNIT_MAX]; |
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128 | |
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129 | struct usb_xfer *sc_xfer[UBSER_N_TRANSFER]; |
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130 | struct usb_device *sc_udev; |
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131 | struct mtx sc_mtx; |
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132 | |
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133 | uint16_t sc_tx_size; |
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134 | |
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135 | uint8_t sc_numser; |
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136 | uint8_t sc_iface_no; |
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137 | uint8_t sc_iface_index; |
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138 | uint8_t sc_curr_tx_unit; |
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139 | }; |
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140 | |
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141 | /* prototypes */ |
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142 | |
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143 | static device_probe_t ubser_probe; |
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144 | static device_attach_t ubser_attach; |
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145 | static device_detach_t ubser_detach; |
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146 | static void ubser_free_softc(struct ubser_softc *); |
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147 | |
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148 | static usb_callback_t ubser_write_callback; |
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149 | static usb_callback_t ubser_read_callback; |
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150 | |
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151 | static void ubser_free(struct ucom_softc *); |
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152 | static int ubser_pre_param(struct ucom_softc *, struct termios *); |
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153 | static void ubser_cfg_set_break(struct ucom_softc *, uint8_t); |
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154 | static void ubser_cfg_get_status(struct ucom_softc *, uint8_t *, |
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155 | uint8_t *); |
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156 | static void ubser_start_read(struct ucom_softc *); |
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157 | static void ubser_stop_read(struct ucom_softc *); |
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158 | static void ubser_start_write(struct ucom_softc *); |
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159 | static void ubser_stop_write(struct ucom_softc *); |
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160 | static void ubser_poll(struct ucom_softc *ucom); |
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161 | |
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162 | static const struct usb_config ubser_config[UBSER_N_TRANSFER] = { |
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163 | |
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164 | [UBSER_BULK_DT_WR] = { |
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165 | .type = UE_BULK, |
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166 | .endpoint = UE_ADDR_ANY, |
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167 | .direction = UE_DIR_OUT, |
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168 | .bufsize = 0, /* use wMaxPacketSize */ |
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169 | .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, |
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170 | .callback = &ubser_write_callback, |
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171 | }, |
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172 | |
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173 | [UBSER_BULK_DT_RD] = { |
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174 | .type = UE_BULK, |
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175 | .endpoint = UE_ADDR_ANY, |
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176 | .direction = UE_DIR_IN, |
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177 | .bufsize = 0, /* use wMaxPacketSize */ |
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178 | .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, |
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179 | .callback = &ubser_read_callback, |
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180 | }, |
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181 | }; |
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182 | |
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183 | static const struct ucom_callback ubser_callback = { |
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184 | .ucom_cfg_set_break = &ubser_cfg_set_break, |
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185 | .ucom_cfg_get_status = &ubser_cfg_get_status, |
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186 | .ucom_pre_param = &ubser_pre_param, |
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187 | .ucom_start_read = &ubser_start_read, |
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188 | .ucom_stop_read = &ubser_stop_read, |
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189 | .ucom_start_write = &ubser_start_write, |
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190 | .ucom_stop_write = &ubser_stop_write, |
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191 | .ucom_poll = &ubser_poll, |
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192 | .ucom_free = &ubser_free, |
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193 | }; |
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194 | |
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195 | static device_method_t ubser_methods[] = { |
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196 | DEVMETHOD(device_probe, ubser_probe), |
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197 | DEVMETHOD(device_attach, ubser_attach), |
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198 | DEVMETHOD(device_detach, ubser_detach), |
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199 | DEVMETHOD_END |
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200 | }; |
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201 | |
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202 | static devclass_t ubser_devclass; |
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203 | |
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204 | static driver_t ubser_driver = { |
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205 | .name = "ubser", |
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206 | .methods = ubser_methods, |
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207 | .size = sizeof(struct ubser_softc), |
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208 | }; |
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209 | |
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210 | DRIVER_MODULE(ubser, uhub, ubser_driver, ubser_devclass, NULL, 0); |
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211 | MODULE_DEPEND(ubser, ucom, 1, 1, 1); |
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212 | MODULE_DEPEND(ubser, usb, 1, 1, 1); |
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213 | MODULE_VERSION(ubser, 1); |
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214 | |
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215 | static int |
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216 | ubser_probe(device_t dev) |
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217 | { |
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218 | struct usb_attach_arg *uaa = device_get_ivars(dev); |
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219 | |
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220 | if (uaa->usb_mode != USB_MODE_HOST) { |
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221 | return (ENXIO); |
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222 | } |
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223 | /* check if this is a BWCT vendor specific ubser interface */ |
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224 | if ((strcmp(usb_get_manufacturer(uaa->device), "BWCT") == 0) && |
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225 | (uaa->info.bInterfaceClass == 0xff) && |
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226 | (uaa->info.bInterfaceSubClass == 0x00)) |
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227 | return (0); |
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228 | |
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229 | return (ENXIO); |
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230 | } |
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231 | |
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232 | static int |
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233 | ubser_attach(device_t dev) |
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234 | { |
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235 | struct usb_attach_arg *uaa = device_get_ivars(dev); |
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236 | struct ubser_softc *sc = device_get_softc(dev); |
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237 | struct usb_device_request req; |
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238 | uint8_t n; |
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239 | int error; |
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240 | |
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241 | device_set_usb_desc(dev); |
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242 | mtx_init(&sc->sc_mtx, "ubser", NULL, MTX_DEF); |
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243 | ucom_ref(&sc->sc_super_ucom); |
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244 | |
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245 | sc->sc_iface_no = uaa->info.bIfaceNum; |
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246 | sc->sc_iface_index = uaa->info.bIfaceIndex; |
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247 | sc->sc_udev = uaa->device; |
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248 | |
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249 | /* get number of serials */ |
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250 | req.bmRequestType = UT_READ_VENDOR_INTERFACE; |
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251 | req.bRequest = VENDOR_GET_NUMSER; |
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252 | USETW(req.wValue, 0); |
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253 | req.wIndex[0] = sc->sc_iface_no; |
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254 | req.wIndex[1] = 0; |
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255 | USETW(req.wLength, 1); |
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256 | error = usbd_do_request_flags(uaa->device, NULL, |
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257 | &req, &sc->sc_numser, |
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258 | 0, NULL, USB_DEFAULT_TIMEOUT); |
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259 | |
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260 | if (error || (sc->sc_numser == 0)) { |
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261 | device_printf(dev, "failed to get number " |
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262 | "of serial ports: %s\n", |
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263 | usbd_errstr(error)); |
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264 | goto detach; |
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265 | } |
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266 | if (sc->sc_numser > UBSER_UNIT_MAX) |
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267 | sc->sc_numser = UBSER_UNIT_MAX; |
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268 | |
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269 | device_printf(dev, "found %i serials\n", sc->sc_numser); |
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270 | |
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271 | error = usbd_transfer_setup(uaa->device, &sc->sc_iface_index, |
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272 | sc->sc_xfer, ubser_config, UBSER_N_TRANSFER, sc, &sc->sc_mtx); |
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273 | if (error) { |
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274 | goto detach; |
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275 | } |
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276 | sc->sc_tx_size = usbd_xfer_max_len(sc->sc_xfer[UBSER_BULK_DT_WR]); |
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277 | |
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278 | if (sc->sc_tx_size == 0) { |
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279 | DPRINTFN(0, "invalid tx_size\n"); |
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280 | goto detach; |
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281 | } |
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282 | /* initialize port numbers */ |
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283 | |
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284 | for (n = 0; n < sc->sc_numser; n++) { |
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285 | sc->sc_ucom[n].sc_portno = n; |
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286 | } |
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287 | |
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288 | error = ucom_attach(&sc->sc_super_ucom, sc->sc_ucom, |
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289 | sc->sc_numser, sc, &ubser_callback, &sc->sc_mtx); |
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290 | if (error) { |
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291 | goto detach; |
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292 | } |
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293 | ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); |
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294 | |
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295 | mtx_lock(&sc->sc_mtx); |
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296 | usbd_xfer_set_stall(sc->sc_xfer[UBSER_BULK_DT_WR]); |
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297 | usbd_xfer_set_stall(sc->sc_xfer[UBSER_BULK_DT_RD]); |
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298 | usbd_transfer_start(sc->sc_xfer[UBSER_BULK_DT_RD]); |
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299 | mtx_unlock(&sc->sc_mtx); |
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300 | |
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301 | return (0); /* success */ |
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302 | |
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303 | detach: |
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304 | ubser_detach(dev); |
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305 | return (ENXIO); /* failure */ |
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306 | } |
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307 | |
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308 | static int |
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309 | ubser_detach(device_t dev) |
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310 | { |
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311 | struct ubser_softc *sc = device_get_softc(dev); |
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312 | |
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313 | DPRINTF("\n"); |
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314 | |
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315 | ucom_detach(&sc->sc_super_ucom, sc->sc_ucom); |
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316 | usbd_transfer_unsetup(sc->sc_xfer, UBSER_N_TRANSFER); |
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317 | |
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318 | device_claim_softc(dev); |
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319 | |
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320 | ubser_free_softc(sc); |
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321 | |
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322 | return (0); |
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323 | } |
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324 | |
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325 | UCOM_UNLOAD_DRAIN(ubser); |
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326 | |
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327 | static void |
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328 | ubser_free_softc(struct ubser_softc *sc) |
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329 | { |
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330 | if (ucom_unref(&sc->sc_super_ucom)) { |
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331 | mtx_destroy(&sc->sc_mtx); |
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332 | device_free_softc(sc); |
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333 | } |
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334 | } |
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335 | |
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336 | static void |
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337 | ubser_free(struct ucom_softc *ucom) |
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338 | { |
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339 | ubser_free_softc(ucom->sc_parent); |
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340 | } |
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341 | |
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342 | static int |
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343 | ubser_pre_param(struct ucom_softc *ucom, struct termios *t) |
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344 | { |
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345 | DPRINTF("\n"); |
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346 | |
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347 | /* |
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348 | * The firmware on our devices can only do 8n1@9600bps |
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349 | * without handshake. |
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350 | * We refuse to accept other configurations. |
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351 | */ |
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352 | |
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353 | /* ensure 9600bps */ |
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354 | switch (t->c_ospeed) { |
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355 | case 9600: |
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356 | break; |
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357 | default: |
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358 | return (EINVAL); |
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359 | } |
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360 | |
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361 | /* 2 stop bits not possible */ |
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362 | if (t->c_cflag & CSTOPB) |
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363 | return (EINVAL); |
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364 | |
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365 | /* XXX parity handling not possible with current firmware */ |
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366 | if (t->c_cflag & PARENB) |
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367 | return (EINVAL); |
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368 | |
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369 | /* we can only do 8 data bits */ |
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370 | switch (t->c_cflag & CSIZE) { |
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371 | case CS8: |
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372 | break; |
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373 | default: |
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374 | return (EINVAL); |
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375 | } |
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376 | |
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377 | /* we can't do any kind of hardware handshaking */ |
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378 | if ((t->c_cflag & |
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379 | (CRTS_IFLOW | CDTR_IFLOW | CDSR_OFLOW | CCAR_OFLOW)) != 0) |
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380 | return (EINVAL); |
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381 | |
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382 | /* |
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383 | * XXX xon/xoff not supported by the firmware! |
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384 | * This is handled within FreeBSD only and may overflow buffers |
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385 | * because of delayed reaction due to device buffering. |
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386 | */ |
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387 | |
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388 | return (0); |
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389 | } |
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390 | |
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391 | static __inline void |
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392 | ubser_inc_tx_unit(struct ubser_softc *sc) |
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393 | { |
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394 | sc->sc_curr_tx_unit++; |
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395 | if (sc->sc_curr_tx_unit >= sc->sc_numser) { |
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396 | sc->sc_curr_tx_unit = 0; |
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397 | } |
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398 | } |
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399 | |
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400 | static void |
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401 | ubser_write_callback(struct usb_xfer *xfer, usb_error_t error) |
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402 | { |
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403 | struct ubser_softc *sc = usbd_xfer_softc(xfer); |
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404 | struct usb_page_cache *pc; |
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405 | uint8_t buf[1]; |
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406 | uint8_t first_unit = sc->sc_curr_tx_unit; |
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407 | uint32_t actlen; |
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408 | |
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409 | switch (USB_GET_STATE(xfer)) { |
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410 | case USB_ST_SETUP: |
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411 | case USB_ST_TRANSFERRED: |
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412 | tr_setup: |
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413 | pc = usbd_xfer_get_frame(xfer, 0); |
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414 | do { |
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415 | if (ucom_get_data(sc->sc_ucom + sc->sc_curr_tx_unit, |
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416 | pc, 1, sc->sc_tx_size - 1, |
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417 | &actlen)) { |
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418 | |
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419 | buf[0] = sc->sc_curr_tx_unit; |
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420 | |
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421 | usbd_copy_in(pc, 0, buf, 1); |
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422 | |
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423 | usbd_xfer_set_frame_len(xfer, 0, actlen + 1); |
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424 | usbd_transfer_submit(xfer); |
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425 | |
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426 | ubser_inc_tx_unit(sc); /* round robin */ |
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427 | |
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428 | break; |
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429 | } |
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430 | ubser_inc_tx_unit(sc); |
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431 | |
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432 | } while (sc->sc_curr_tx_unit != first_unit); |
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433 | |
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434 | return; |
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435 | |
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436 | default: /* Error */ |
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437 | if (error != USB_ERR_CANCELLED) { |
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438 | /* try to clear stall first */ |
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439 | usbd_xfer_set_stall(xfer); |
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440 | goto tr_setup; |
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441 | } |
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442 | return; |
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443 | |
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444 | } |
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445 | } |
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446 | |
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447 | static void |
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448 | ubser_read_callback(struct usb_xfer *xfer, usb_error_t error) |
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449 | { |
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450 | struct ubser_softc *sc = usbd_xfer_softc(xfer); |
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451 | struct usb_page_cache *pc; |
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452 | uint8_t buf[1]; |
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453 | int actlen; |
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454 | |
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455 | usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); |
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456 | |
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457 | switch (USB_GET_STATE(xfer)) { |
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458 | case USB_ST_TRANSFERRED: |
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459 | if (actlen < 1) { |
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460 | DPRINTF("invalid actlen=0!\n"); |
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461 | goto tr_setup; |
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462 | } |
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463 | pc = usbd_xfer_get_frame(xfer, 0); |
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464 | usbd_copy_out(pc, 0, buf, 1); |
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465 | |
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466 | if (buf[0] >= sc->sc_numser) { |
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467 | DPRINTF("invalid serial number!\n"); |
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468 | goto tr_setup; |
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469 | } |
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470 | ucom_put_data(sc->sc_ucom + buf[0], pc, 1, actlen - 1); |
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471 | |
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472 | case USB_ST_SETUP: |
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473 | tr_setup: |
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474 | usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); |
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475 | usbd_transfer_submit(xfer); |
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476 | return; |
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477 | |
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478 | default: /* Error */ |
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479 | if (error != USB_ERR_CANCELLED) { |
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480 | /* try to clear stall first */ |
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481 | usbd_xfer_set_stall(xfer); |
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482 | goto tr_setup; |
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483 | } |
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484 | return; |
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485 | |
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486 | } |
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487 | } |
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488 | |
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489 | static void |
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490 | ubser_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) |
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491 | { |
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492 | struct ubser_softc *sc = ucom->sc_parent; |
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493 | uint8_t x = ucom->sc_portno; |
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494 | struct usb_device_request req; |
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495 | usb_error_t err; |
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496 | |
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497 | if (onoff) { |
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498 | |
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499 | req.bmRequestType = UT_READ_VENDOR_INTERFACE; |
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500 | req.bRequest = VENDOR_SET_BREAK; |
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501 | req.wValue[0] = x; |
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502 | req.wValue[1] = 0; |
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503 | req.wIndex[0] = sc->sc_iface_no; |
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504 | req.wIndex[1] = 0; |
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505 | USETW(req.wLength, 0); |
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506 | |
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507 | err = ucom_cfg_do_request(sc->sc_udev, ucom, |
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508 | &req, NULL, 0, 1000); |
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509 | if (err) { |
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510 | DPRINTFN(0, "send break failed, error=%s\n", |
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511 | usbd_errstr(err)); |
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512 | } |
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513 | } |
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514 | } |
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515 | |
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516 | static void |
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517 | ubser_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) |
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518 | { |
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519 | /* fake status bits */ |
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520 | *lsr = 0; |
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521 | *msr = SER_DCD; |
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522 | } |
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523 | |
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524 | static void |
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525 | ubser_start_read(struct ucom_softc *ucom) |
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526 | { |
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527 | struct ubser_softc *sc = ucom->sc_parent; |
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528 | |
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529 | usbd_transfer_start(sc->sc_xfer[UBSER_BULK_DT_RD]); |
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530 | } |
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531 | |
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532 | static void |
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533 | ubser_stop_read(struct ucom_softc *ucom) |
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534 | { |
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535 | struct ubser_softc *sc = ucom->sc_parent; |
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536 | |
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537 | usbd_transfer_stop(sc->sc_xfer[UBSER_BULK_DT_RD]); |
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538 | } |
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539 | |
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540 | static void |
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541 | ubser_start_write(struct ucom_softc *ucom) |
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542 | { |
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543 | struct ubser_softc *sc = ucom->sc_parent; |
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544 | |
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545 | usbd_transfer_start(sc->sc_xfer[UBSER_BULK_DT_WR]); |
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546 | } |
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547 | |
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548 | static void |
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549 | ubser_stop_write(struct ucom_softc *ucom) |
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550 | { |
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551 | struct ubser_softc *sc = ucom->sc_parent; |
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552 | |
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553 | usbd_transfer_stop(sc->sc_xfer[UBSER_BULK_DT_WR]); |
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554 | } |
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555 | |
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556 | static void |
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557 | ubser_poll(struct ucom_softc *ucom) |
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558 | { |
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559 | struct ubser_softc *sc = ucom->sc_parent; |
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560 | usbd_transfer_poll(sc->sc_xfer, UBSER_N_TRANSFER); |
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561 | } |
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