diff options
Diffstat (limited to 'rmidevice/hiddevice.cpp')
| -rw-r--r-- | rmidevice/hiddevice.cpp | 90 |
1 files changed, 86 insertions, 4 deletions
diff --git a/rmidevice/hiddevice.cpp b/rmidevice/hiddevice.cpp index 8b99d75..1345db2 100644 --- a/rmidevice/hiddevice.cpp +++ b/rmidevice/hiddevice.cpp @@ -45,6 +45,13 @@ enum rmi_hid_mode_type { HID_RMI4_MODE_NO_PACKED_ATTN_REPORTS = 2, }; +enum hid_report_type { + HID_REPORT_TYPE_UNKNOWN = 0x0, + HID_REPORT_TYPE_INPUT = 0x81, + HID_REPORT_TYPE_OUTPUT = 0x91, + HID_REPORT_TYPE_FEATURE = 0xb1, +}; + #define HID_RMI4_REPORT_ID 0 #define HID_RMI4_READ_INPUT_COUNT 1 #define HID_RMI4_READ_INPUT_DATA 2 @@ -85,10 +92,7 @@ int HIDDevice::Open(const char * filename) if (rc < 0) return rc; - /* FIXME: get there from the report descriptor */ - m_inputReportSize = 30; - m_outputReportSize = 25; - m_featureReportSize = 2; + ParseReportSizes(); m_inputReport = new unsigned char[m_inputReportSize](); if (!m_inputReport) @@ -115,6 +119,84 @@ int HIDDevice::Open(const char * filename) return 0; } +void HIDDevice::ParseReportSizes() +{ + bool isVendorSpecific = false; + bool isReport = false; + int totalReportSize = 0; + int reportSize = 0; + int reportCount = 0; + enum hid_report_type hidReportType = HID_REPORT_TYPE_UNKNOWN; + + for (unsigned int i = 0; i < m_rptDesc.size; ++i) { + if (isVendorSpecific) { + if (m_rptDesc.value[i] == 0x85 || m_rptDesc.value[i] == 0xc0) { + if (isReport) { + // finish up data on the previous report + totalReportSize = (reportSize * reportCount) >> 3; + + switch (hidReportType) { + case HID_REPORT_TYPE_INPUT: + m_inputReportSize = totalReportSize + 1; + break; + case HID_REPORT_TYPE_OUTPUT: + m_outputReportSize = totalReportSize + 1; + break; + case HID_REPORT_TYPE_FEATURE: + m_featureReportSize = totalReportSize + 1; + break; + case HID_REPORT_TYPE_UNKNOWN: + default: + break; + } + } + + // reset values for the new report + totalReportSize = 0; + reportSize = 0; + reportCount = 0; + hidReportType = HID_REPORT_TYPE_UNKNOWN; + + if (m_rptDesc.value[i] == 0x85) + isReport = true; + else + isReport = false; + + if (m_rptDesc.value[i] == 0xc0) + isVendorSpecific = false; + } + + if (isReport) { + if (m_rptDesc.value[i] == 0x75) { + reportSize = m_rptDesc.value[++i]; + continue; + } + + if (m_rptDesc.value[i] == 0x95) { + reportCount = m_rptDesc.value[++i]; + continue; + } + + if (m_rptDesc.value[i] == HID_REPORT_TYPE_INPUT) + hidReportType = HID_REPORT_TYPE_INPUT; + + if (m_rptDesc.value[i] == HID_REPORT_TYPE_OUTPUT) + hidReportType = HID_REPORT_TYPE_OUTPUT; + + if (m_rptDesc.value[i] == HID_REPORT_TYPE_FEATURE) { + hidReportType = HID_REPORT_TYPE_FEATURE; + } + } + } + + if (m_rptDesc.value[i] == 0x06 && m_rptDesc.value[i + 1] == 0x00 + && m_rptDesc.value[i + 2] == 0xFF) { + isVendorSpecific = true; + i += 2; + } + } +} + int HIDDevice::Read(unsigned short addr, unsigned char *buf, unsigned short len) { size_t count; |