diff mbox

[3/5] add video control register handlers

Message ID 1517840981-12280-4-git-send-email-floe@butterbrot.org (mailing list archive)
State New, archived
Headers show

Commit Message

Florian Echtler Feb. 5, 2018, 2:29 p.m. UTC 
Signed-off-by: Florian Echtler <floe@butterbrot.org>
---
 drivers/input/touchscreen/sur40.c | 70 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
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Patch

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 0dbb004..63c7264b 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -247,6 +255,80 @@  static int sur40_command(struct sur40_state *dev,
 			       0x00, index, buffer, size, 1000);
 }
 
+/* poke a byte in the panel register space */
+static int sur40_poke(struct sur40_state *dev, u8 offset, u8 value)
+{
+	int result;
+	u8 index = 0x96; // 0xae for permanent write
+
+	result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
+		SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+		0x32, index, NULL, 0, 1000);
+	if (result < 0)
+		goto error;
+	msleep(5);
+
+	result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
+		SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+		0x72, offset, NULL, 0, 1000);
+	if (result < 0)
+		goto error;
+	msleep(5);
+
+	result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
+		SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+		0xb2, value, NULL, 0, 1000);
+	if (result < 0)
+		goto error;
+	msleep(5);
+
+error:
+	return result;
+}
+
+static int sur40_set_preprocessor(struct sur40_state *dev, u8 value)
+{
+	u8 setting_07[2] = { 0x01, 0x00 };
+	u8 setting_17[2] = { 0x85, 0x80 };
+	int result;
+
+	if (value > 1)
+		return -ERANGE;
+
+	result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
+		SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+		0x07, setting_07[value], NULL, 0, 1000);
+	if (result < 0)
+		goto error;
+	msleep(5);
+
+	result = usb_control_msg(dev->usbdev, usb_sndctrlpipe(dev->usbdev, 0),
+		SUR40_POKE, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
+		0x17, setting_17[value], NULL, 0, 1000);
+	if (result < 0)
+		goto error;
+	msleep(5);
+
+error:
+	return result;
+}
+
+static void sur40_set_vsvideo(struct sur40_state *handle, u8 value)
+{
+	int i;
+
+	for (i = 0; i < 4; i++)
+		sur40_poke(handle, 0x1c+i, value);
+}
+
+static void sur40_set_irlevel(struct sur40_state *handle, u8 value)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		sur40_poke(handle, 0x08+(2*i), value);
+}
+
 /* Initialization routine, called from sur40_open */
 static int sur40_init(struct sur40_state *dev)
 {