HID: wacom: OLEDs control over sysfs for Intuos4
Thsi patch adds ability to control OLED micro displays on Wacom Intuos4 Wireless. The OLEDS are exposed as /sys/class/hidraw/hidraw*/device/oled{No]_img where No. is 0 to 7 Setting an image: dd bs=256 if=img_file of=/sys/class/hidraw/hidraw{No}/device/oled0_img The image has to contain 256 bytes (64x32px 1 bit). More detailed description in Documentation/ABI/testing/sysfs-driver-wacom Signed-off-by: Przemo Firszt <przemo@firszt.eu> Acked-by: Ping Cheng <pingc@wacom.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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@ -1,3 +1,16 @@
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WWhat: /sys/class/hidraw/hidraw*/device/oled*_img
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Date: June 2012
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Contact: linux-bluetooth@vger.kernel.org
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Description:
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The /sys/class/hidraw/hidraw*/device/oled*_img files control
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OLED mocro displays on Intuos4 Wireless tablet. Accepted image
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has to contain 256 bytes (64x32 px 1 bit colour). The format
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is the same as PBM image 62x32px without header (64 bits per
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horizontal line, 32 lines). An example of setting OLED No. 0:
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dd bs=256 count=1 if=img_file of=[path to oled0_img]/oled0_img
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The attribute is read only and no local copy of the image is
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stored.
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What: /sys/class/hidraw/hidraw*/device/speed
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Date: April 2010
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Kernel Version: 2.6.35
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@ -33,6 +33,8 @@
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#define PAD_DEVICE_ID 0x0F
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#define WAC_CMD_LED_CONTROL 0x20
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#define WAC_CMD_ICON_START_STOP 0x21
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#define WAC_CMD_ICON_TRANSFER 0x26
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struct wacom_data {
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__u16 tool;
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@ -69,6 +71,91 @@ static enum power_supply_property wacom_ac_props[] = {
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POWER_SUPPLY_PROP_SCOPE,
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};
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static void wacom_scramble(__u8 *image)
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{
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__u16 mask;
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__u16 s1;
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__u16 s2;
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__u16 r1 ;
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__u16 r2 ;
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__u16 r;
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__u8 buf[256];
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int i, w, x, y, z;
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for (x = 0; x < 32; x++) {
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for (y = 0; y < 8; y++)
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buf[(8 * x) + (7 - y)] = image[(8 * x) + y];
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}
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/* Change 76543210 into GECA6420 as required by Intuos4 WL
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* HGFEDCBA HFDB7531
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*/
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for (x = 0; x < 4; x++) {
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for (y = 0; y < 4; y++) {
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for (z = 0; z < 8; z++) {
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mask = 0x0001;
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r1 = 0;
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r2 = 0;
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i = (x << 6) + (y << 4) + z;
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s1 = buf[i];
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s2 = buf[i+8];
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for (w = 0; w < 8; w++) {
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r1 |= (s1 & mask);
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r2 |= (s2 & mask);
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s1 <<= 1;
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s2 <<= 1;
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mask <<= 2;
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}
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r = r1 | (r2 << 1);
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i = (x << 6) + (y << 4) + (z << 1);
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image[i] = 0xFF & r;
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image[i+1] = (0xFF00 & r) >> 8;
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}
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}
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}
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}
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static void wacom_set_image(struct hid_device *hdev, const char *image,
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__u8 icon_no)
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{
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__u8 rep_data[68];
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__u8 p[256];
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int ret, i, j;
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for (i = 0; i < 256; i++)
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p[i] = image[i];
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rep_data[0] = WAC_CMD_ICON_START_STOP;
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rep_data[1] = 0;
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ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
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HID_FEATURE_REPORT);
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if (ret < 0)
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goto err;
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rep_data[0] = WAC_CMD_ICON_TRANSFER;
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rep_data[1] = icon_no & 0x07;
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wacom_scramble(p);
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for (i = 0; i < 4; i++) {
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for (j = 0; j < 64; j++)
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rep_data[j + 3] = p[(i << 6) + j];
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rep_data[2] = i;
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ret = hdev->hid_output_raw_report(hdev, rep_data, 67,
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HID_FEATURE_REPORT);
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}
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rep_data[0] = WAC_CMD_ICON_START_STOP;
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rep_data[1] = 0;
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ret = hdev->hid_output_raw_report(hdev, rep_data, 2,
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HID_FEATURE_REPORT);
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err:
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return;
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}
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static void wacom_leds_set_brightness(struct led_classdev *led_dev,
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enum led_brightness value)
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{
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@ -93,6 +180,8 @@ static void wacom_leds_set_brightness(struct led_classdev *led_dev,
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buf[1] = led;
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buf[2] = value >> 2;
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buf[3] = value;
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/* use fixed brightness for OLEDs */
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buf[4] = 0x08;
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hdev->hid_output_raw_report(hdev, buf, 9, HID_FEATURE_REPORT);
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kfree(buf);
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}
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@ -318,6 +407,34 @@ static ssize_t wacom_store_speed(struct device *dev,
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static DEVICE_ATTR(speed, S_IRUGO | S_IWUSR | S_IWGRP,
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wacom_show_speed, wacom_store_speed);
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#define WACOM_STORE(OLED_ID) \
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static ssize_t wacom_oled##OLED_ID##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct hid_device *hdev = container_of(dev, struct hid_device, \
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dev); \
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\
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if (count != 256) \
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return -EINVAL; \
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\
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wacom_set_image(hdev, buf, OLED_ID); \
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\
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return count; \
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} \
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\
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static DEVICE_ATTR(oled##OLED_ID##_img, S_IWUSR | S_IWGRP, NULL, \
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wacom_oled##OLED_ID##_store)
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WACOM_STORE(0);
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WACOM_STORE(1);
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WACOM_STORE(2);
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WACOM_STORE(3);
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WACOM_STORE(4);
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WACOM_STORE(5);
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WACOM_STORE(6);
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WACOM_STORE(7);
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static int wacom_gr_parse_report(struct hid_device *hdev,
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struct wacom_data *wdata,
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struct input_dev *input, unsigned char *data)
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@ -718,6 +835,24 @@ static int wacom_probe(struct hid_device *hdev,
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hid_warn(hdev,
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"can't create sysfs speed attribute err: %d\n", ret);
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#define OLED_INIT(OLED_ID) \
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do { \
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ret = device_create_file(&hdev->dev, \
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&dev_attr_oled##OLED_ID##_img); \
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if (ret) \
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hid_warn(hdev, \
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"can't create sysfs oled attribute, err: %d\n", ret);\
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} while (0)
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OLED_INIT(0);
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OLED_INIT(1);
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OLED_INIT(2);
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OLED_INIT(3);
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OLED_INIT(4);
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OLED_INIT(5);
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OLED_INIT(6);
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OLED_INIT(7);
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wdata->features = 0;
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wacom_set_features(hdev, 1);
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@ -782,6 +917,14 @@ static void wacom_remove(struct hid_device *hdev)
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struct wacom_data *wdata = hid_get_drvdata(hdev);
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wacom_destroy_leds(hdev);
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device_remove_file(&hdev->dev, &dev_attr_oled0_img);
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device_remove_file(&hdev->dev, &dev_attr_oled1_img);
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device_remove_file(&hdev->dev, &dev_attr_oled2_img);
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device_remove_file(&hdev->dev, &dev_attr_oled3_img);
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device_remove_file(&hdev->dev, &dev_attr_oled4_img);
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device_remove_file(&hdev->dev, &dev_attr_oled5_img);
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device_remove_file(&hdev->dev, &dev_attr_oled6_img);
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device_remove_file(&hdev->dev, &dev_attr_oled7_img);
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device_remove_file(&hdev->dev, &dev_attr_speed);
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hid_hw_stop(hdev);
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