1 | /* CrO2 datassette emulator
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2 | * Copyright 2013, Adrien Destugues <pulkomandy@pulkomandy.tk>
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3 | *
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4 | * Distributed under the terms of the MIT licence.
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5 | *
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6 | * Handles device communication through libusb
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7 | */
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8 |
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9 | #include "device_bekit.h"
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10 | #include "k5.h"
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11 |
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12 | #include <typeinfo>
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13 | #include <USBKit.h>
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14 |
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15 | class DeviceScanner: public BUSBRoster
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16 | {
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17 | public:
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18 | DeviceScanner(uint32_t vid, uint32_t pid, const char* vendor, const char* product);
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19 |
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20 | // BUSBRoster
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21 | status_t DeviceAdded(BUSBDevice* device);
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22 | void DeviceRemoved(BUSBDevice* device);
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23 |
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24 | BUSBDevice* handle;
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25 | private:
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26 | uint32_t vid, pid;
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27 | const char* vendor, *product;
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28 | };
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29 |
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30 | // Gets the device instance. Throws an error message if something bad happens.
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31 | Device& Device::getDevice() throw(const char*)
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32 | {
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33 | if (instance == NULL) {
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34 | DeviceScanner* scanner = new DeviceScanner(vid, pid, vendor, product);
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35 |
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36 | while(scanner->handle == NULL); // FIXME don't hog CPU, and timeout
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37 | //throw "Device not found. Is the USB cable plugged correctly?";
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38 |
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39 | // We have our device, don't need the roster anymore.
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40 | delete scanner;
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41 |
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42 | instance = new HaikuDevice(scanner->handle);
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43 | }
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44 |
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45 | return *instance;
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46 | }
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47 |
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48 |
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49 | HaikuDevice::HaikuDevice(BUSBDevice* handle) throw(const char*)
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50 | {
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51 | this->handle = handle;
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52 | }
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53 |
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54 |
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55 | HaikuDevice::~HaikuDevice()
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56 | {
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57 | delete handle;
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58 | }
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59 |
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60 |
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61 | int HaikuDevice::read(uint8_t* buffer, size_t max)
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62 | {
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63 | return handle->ControlTransfer(USB_REQTYPE_VENDOR | USB_REQTYPE_ENDPOINT_IN,
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64 | PSCMD_GET, 0,0, max, (char*)buffer);
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65 |
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66 | }
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67 |
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68 |
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69 | int HaikuDevice::write(const uint8_t* buffer, size_t size, int blktype)
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70 | {
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71 | int rqtype = (size == 0) ? USB_REQTYPE_ENDPOINT_IN:USB_REQTYPE_ENDPOINT_OUT;
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72 | return handle->ControlTransfer(USB_REQTYPE_VENDOR | rqtype,
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73 | PSCMD_PUT, blktype,0 /*checksum*/, size, (char*)buffer);
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74 |
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75 | }
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76 |
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77 |
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78 | uint8_t HaikuDevice::getStatus()
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79 | {
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80 | uint8_t status;
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81 | handle->ControlTransfer(USB_REQTYPE_VENDOR | USB_REQTYPE_ENDPOINT_IN,
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82 | PSCMD_STATUS, 0,0, 1, (char*)&status);
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83 | // TODO handle errors (return value)
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84 | return status;
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85 | }
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86 |
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87 |
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88 | DeviceScanner::DeviceScanner(uint32_t vid, uint32_t pid, const char* vendor, const char* product)
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89 | : vid(vid)
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90 | , pid(pid)
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91 | , vendor(vendor)
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92 | , product(product)
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93 | {
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94 | }
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95 |
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96 |
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97 | status_t DeviceScanner::DeviceAdded(BUSBDevice* device)
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98 | {
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99 | if (handle != NULL) {
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100 | // We already have a device !
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101 | return B_ERROR;
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102 | }
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103 |
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104 | // Check if the device matches what we can handle
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105 |
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106 | if (device->VendorID() != vid && device->ProductID() != pid)
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107 | return B_ERROR;
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108 |
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109 | // Since we use V-USB shared vid/pid pair, we also have to check the
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110 | // manufacturer and product strings to actually identify the device amongst
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111 | // other users of the pair.
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112 | if (strcmp(device->ManufacturerString(), vendor) != 0)
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113 | return B_ERROR;
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114 |
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115 | if (strcmp(device->ProductString(), product) != 0)
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116 | return B_ERROR;
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117 |
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118 | // Ok, we have found our device !
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119 | handle = device;
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120 | return B_OK;
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121 | }
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122 |
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123 |
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124 | void DeviceScanner::DeviceRemoved(BUSBDevice* device)
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125 | {
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126 | // This is only called for devices we accepted in DeviceAdded. We accept
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127 | // only one, so we can safely remove it.
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128 | handle = NULL;
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129 | }
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130 |
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