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[76.87.77.78]) by smtp.gmail.com with ESMTPSA id r20sm49537931pgb.3.2021.01.02.14.31.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Jan 2021 14:31:40 -0800 (PST) From: Roderick Colenbrander To: Jiri Kosina , Benjamin Tissoires Cc: linux-input@vger.kernel.org, Chris Ye , Roderick Colenbrander Subject: [PATCH v2 07/13] HID: playstation: add DualSense Bluetooth support. Date: Sat, 2 Jan 2021 14:31:03 -0800 Message-Id: <20210102223109.996781-8-roderick@gaikai.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210102223109.996781-1-roderick@gaikai.com> References: <20210102223109.996781-1-roderick@gaikai.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Roderick Colenbrander This patch adds support for the DualSense when operating in Bluetooth mode. The device has the same behavior as the DualShock 4 in that by default it sends a limited input report (0x1), but after requesting calibration data, it switches to an extended input report (report 49), which adds data for touchpad, motion sensors, battery and more. Signed-off-by: Roderick Colenbrander --- drivers/hid/hid-playstation.c | 35 +++++++++++++++++++++++++++++++++++ drivers/hid/hid-quirks.c | 1 + 2 files changed, 36 insertions(+) diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c index 91f3ed005fce..552a52a50b78 100644 --- a/drivers/hid/hid-playstation.c +++ b/drivers/hid/hid-playstation.c @@ -47,6 +47,7 @@ struct ps_calibration_data { }; #define DS_INPUT_REPORT_USB 0x01 +#define DS_INPUT_REPORT_BT 0x31 #define DS_FEATURE_REPORT_CALIBRATION 5 #define DS_FEATURE_REPORT_CALIBRATION_SIZE 41 @@ -285,6 +286,17 @@ static int ps_device_register_battery(struct ps_device *dev) return 0; } +/* Compute crc32 of HID data and compare against expected CRC. */ +static bool ps_check_crc32(uint8_t seed, uint8_t *data, size_t len, uint32_t report_crc) +{ + uint32_t crc; + + crc = crc32_le(0xFFFFFFFF, &seed, 1); + crc = ~crc32_le(crc, data, len); + + return crc == report_crc; +} + static struct input_dev *ps_gamepad_create(struct hid_device *hdev) { struct input_dev *gamepad; @@ -406,6 +418,18 @@ static int dualsense_get_calibration_data(struct dualsense *ds) goto err_free; } + if (ds->base.hdev->bus == BUS_BLUETOOTH) { + /* Last 4 bytes contains crc32 */ + uint8_t crc_offset = DS_FEATURE_REPORT_CALIBRATION_SIZE - 4; + uint32_t report_crc = get_unaligned_le32(&buf[crc_offset]); + + if (!ps_check_crc32(0xa3, buf, crc_offset, report_crc)) { + hid_err(ds->base.hdev, "DualSense calibration report CRC's check failed\n"); + ret = -EILSEQ; + goto err_free; + } + } + gyro_pitch_bias = get_unaligned_le16(&buf[1]); gyro_yaw_bias = get_unaligned_le16(&buf[3]); gyro_roll_bias = get_unaligned_le16(&buf[5]); @@ -515,6 +539,16 @@ static int dualsense_parse_report(struct ps_device *ps_dev, struct hid_report *r */ if (report->id == DS_INPUT_REPORT_USB && hdev->bus == BUS_USB) { ds_report = (struct dualsense_input_report *)&data[1]; + } else if (report->id == DS_INPUT_REPORT_BT && hdev->bus == BUS_BLUETOOTH) { + /* Last 4 bytes of input report contain crc32 */ + uint32_t report_crc = get_unaligned_le32(&data[size - 4]); + + if (!ps_check_crc32(0xa1, data, size - 4, report_crc)) { + hid_err(hdev, "DualSense input CRC's check failed, size=%d\n", size); + return -EILSEQ; + } + + ds_report = (struct dualsense_input_report *)&data[2]; } else { hid_err(hdev, "Unhandled reportID=%d\n", report->id); return -1; @@ -774,6 +808,7 @@ static void ps_remove(struct hid_device *hdev) } static const struct hid_device_id ps_devices[] = { + { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) }, { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) }, { } }; diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c index 1ca46cb445be..541c8837debd 100644 --- a/drivers/hid/hid-quirks.c +++ b/drivers/hid/hid-quirks.c @@ -567,6 +567,7 @@ static const struct hid_device_id hid_have_special_driver[] = { #endif #if IS_ENABLED(CONFIG_HID_PLAYSTATION) { HID_USB_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) }, ++ { HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_SONY, USB_DEVICE_ID_SONY_PS5_CONTROLLER) }, #endif #if IS_ENABLED(CONFIG_HID_PRIMAX) { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_KEYBOARD) }, -- 2.26.2