Return-Path: From: =?UTF-8?q?Jo=C3=A3o=20Paulo=20Rechi=20Vita?= To: linux-bluetooth@vger.kernel.org Cc: dh.herrmann@googlemail.com, chen.ganir@ti.com, =?UTF-8?q?Jo=C3=A3o=20Paulo=20Rechi=20Vita?= Subject: [RFC 8/8] HoG: HID I/O driver Date: Tue, 27 Mar 2012 19:31:27 -0300 Message-Id: <1332887487-13601-9-git-send-email-jprvita@openbossa.org> In-Reply-To: <1332887487-13601-1-git-send-email-jprvita@openbossa.org> References: <1332887487-13601-1-git-send-email-jprvita@openbossa.org> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: UHID is HID I/O driver that makes possible to implement HID I/O drivers in user-space. It works similar to the uinput but it is initialized with a HID descriptor and deals with raw HID reports. This commit uses UHID to create a HID device for the remote HoG device and to tranfers HID reports to HID subsystem. --- input/hog_device.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 51 insertions(+), 0 deletions(-) diff --git a/input/hog_device.c b/input/hog_device.c index 7a757f4..183da22 100644 --- a/input/hog_device.c +++ b/input/hog_device.c @@ -29,6 +29,10 @@ #include #include #include +#include +#include +#include +#include #include #include @@ -48,6 +52,7 @@ #include "gatt.h" #define HOG_REPORT_UUID 0x2A4D +#define UHID_DEVICE_FILE "/dev/uhid" struct hog_device { char *path; @@ -56,13 +61,17 @@ struct hog_device { guint attioid; struct gatt_primary *hog_primary; struct gatt_char *report; + int uhid_fd; }; static GSList *devices = NULL; static void report_value_cb(const uint8_t *pdu, uint16_t len, gpointer user_data) { + struct hog_device *hogdev = user_data; + struct uhid_event ev; uint16_t handle; + uint16_t report_size = len - 2; if (len < 3) { error("Malformed ATT notification"); @@ -74,6 +83,14 @@ static void report_value_cb(const uint8_t *pdu, uint16_t len, gpointer user_data DBG("Report(0x%04x): 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x " "0x%02x", handle, pdu[2], pdu[3], pdu[4], pdu[5], pdu[6], pdu[7], pdu[8], pdu[9]); + + memset(&ev, 0, sizeof(ev)); + ev.type = UHID_INPUT; + ev.u.input.size = report_size; + memcpy(ev.u.input.data, &pdu[2], report_size); + + if (write(hogdev->uhid_fd, &ev, sizeof(ev)) < 0) + error("UHID write failed: %s", strerror(errno)); } static void report_ccc_written_cb(guint8 status, const guint8 *pdu, @@ -96,6 +113,8 @@ static void report_ccc_written_cb(guint8 status, const guint8 *pdu, static void report_map_read_cb(guint8 status, const guint8 *pdu, guint16 plen, gpointer user_data) { + struct hog_device *hogdev = user_data; + struct uhid_event ev; uint8_t value[ATT_MAX_MTU]; int vlen, i; @@ -116,6 +135,22 @@ static void report_map_read_cb(guint8 status, const guint8 *pdu, guint16 plen, else DBG("\t %02x %02x", value[i], value[i + 1]); } + + /* create UHID device */ + memset(&ev, 0, sizeof(ev)); + ev.type = UHID_CREATE; + /* TODO: get info from DIS */ + strcpy((char*)ev.u.create.name, "bluez-hog-device"); + ev.u.create.vendor = 0xBEBA; + ev.u.create.product = 0xCAFE; + ev.u.create.version = 0; + ev.u.create.country = 0; + ev.u.create.bus = BUS_USB; /* BUS_BLUETOOTH doesn't work here */ + ev.u.create.rd_data = value; + ev.u.create.rd_size = vlen; + + if (write(hogdev->uhid_fd, &ev, sizeof(ev)) < 0) + error("Failed to create UHID device: %s", strerror(errno)); } static void char_discovered_cb(GSList *chars, guint8 status, gpointer user_data) @@ -162,11 +197,27 @@ static void attio_connected_cb(GAttrib *attrib, gpointer user_data) gatt_discover_char(hogdev->attrib, prim->range.start, prim->range.end, NULL, char_discovered_cb, hogdev); + + if (hogdev->uhid_fd > 0) + return; + + hogdev->uhid_fd = open(UHID_DEVICE_FILE, O_RDWR, 0666); + if (hogdev->uhid_fd < 0) + error("Failed to open UHID device: %s", strerror(errno)); } static void attio_disconnected_cb(gpointer user_data) { struct hog_device *hogdev = user_data; + struct uhid_event ev; + + memset(&ev, 0, sizeof(ev)); + ev.type = UHID_DESTROY; + if (write(hogdev->uhid_fd, &ev, sizeof(ev)) < 0) + error("Failed to destroy UHID device: %s", strerror(errno)); + + close(hogdev->uhid_fd); + hogdev->uhid_fd = -1; g_attrib_unref(hogdev->attrib); hogdev->attrib = NULL; -- 1.7.7.6