Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * HID driver for ELO usb touchscreen 4000/4500
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2013 Jiri Slaby
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Data parsing taken from elousb driver by Vojtech Pavlik.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/hid.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "hid-ids.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #define ELO_PERIODIC_READ_INTERVAL	HZ
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #define ELO_SMARTSET_CMD_TIMEOUT	2000 /* msec */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) /* Elo SmartSet commands */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define ELO_FLUSH_SMARTSET_RESPONSES	0x02 /* Flush all pending smartset responses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define ELO_SEND_SMARTSET_COMMAND	0x05 /* Send a smartset command */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define ELO_GET_SMARTSET_RESPONSE	0x06 /* Get a smartset response */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ELO_DIAG			0x64 /* Diagnostics command */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define ELO_SMARTSET_PACKET_SIZE	8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) struct elo_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct usb_device *usbdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	struct delayed_work work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	unsigned char buffer[ELO_SMARTSET_PACKET_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) static struct workqueue_struct *wq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static bool use_fw_quirk = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) module_param(use_fw_quirk, bool, S_IRUGO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) MODULE_PARM_DESC(use_fw_quirk, "Do periodic pokes for broken M firmwares (default = true)");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static int elo_input_configured(struct hid_device *hdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 		struct hid_input *hidinput)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct input_dev *input = hidinput->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	 * ELO devices have one Button usage in GenDesk field, which makes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	 * hid-input map it to BTN_LEFT; that confuses userspace, which then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	 * considers the device to be a mouse/touchpad instead of touchscreen.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	clear_bit(BTN_LEFT, input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	set_bit(BTN_TOUCH, input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	set_bit(ABS_PRESSURE, input->absbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	input_set_abs_params(input, ABS_PRESSURE, 0, 256, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) static void elo_process_data(struct input_dev *input, const u8 *data, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	int press;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	input_report_abs(input, ABS_X, (data[3] << 8) | data[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	input_report_abs(input, ABS_Y, (data[5] << 8) | data[4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	press = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	if (data[1] & 0x80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		press = (data[7] << 8) | data[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	input_report_abs(input, ABS_PRESSURE, press);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (data[1] & 0x03) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		input_report_key(input, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	if (data[1] & 0x04)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		input_report_key(input, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static int elo_raw_event(struct hid_device *hdev, struct hid_report *report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	 u8 *data, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	struct hid_input *hidinput;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (!(hdev->claimed & HID_CLAIMED_INPUT) || list_empty(&hdev->inputs))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	hidinput = list_first_entry(&hdev->inputs, struct hid_input, list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	switch (report->id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		if (data[0] == 'T') {	/* Mandatory ELO packet marker */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 			elo_process_data(hidinput->input, data, size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 			return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	default:	/* unknown report */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		/* Unknown report type; pass upstream */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		hid_info(hdev, "unknown report type %d\n", report->id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static int elo_smartset_send_get(struct usb_device *dev, u8 command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 		void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	unsigned int pipe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	u8 dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	if (command == ELO_SEND_SMARTSET_COMMAND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		pipe = usb_sndctrlpipe(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 		dir = USB_DIR_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	} else if (command == ELO_GET_SMARTSET_RESPONSE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 		pipe = usb_rcvctrlpipe(dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 		dir = USB_DIR_IN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return usb_control_msg(dev, pipe, command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 			dir | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			0, 0, data, ELO_SMARTSET_PACKET_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 			ELO_SMARTSET_CMD_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int elo_flush_smartset_responses(struct usb_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			ELO_FLUSH_SMARTSET_RESPONSES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 			USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 			0, 0, NULL, 0, USB_CTRL_SET_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static void elo_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct elo_priv *priv = container_of(work, struct elo_priv, work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct usb_device *dev = priv->usbdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	unsigned char *buffer = priv->buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	ret = elo_flush_smartset_responses(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		dev_err(&dev->dev, "initial FLUSH_SMARTSET_RESPONSES failed, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 				ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	/* send Diagnostics command */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	*buffer = ELO_DIAG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	ret = elo_smartset_send_get(dev, ELO_SEND_SMARTSET_COMMAND, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		dev_err(&dev->dev, "send Diagnostics Command failed, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 				ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	/* get the result */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	ret = elo_smartset_send_get(dev, ELO_GET_SMARTSET_RESPONSE, buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		dev_err(&dev->dev, "get Diagnostics Command response failed, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 				ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	/* read the ack */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	if (*buffer != 'A') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		ret = elo_smartset_send_get(dev, ELO_GET_SMARTSET_RESPONSE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 				buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 		if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 			dev_err(&dev->dev, "get acknowledge response failed, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 					ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 			goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	ret = elo_flush_smartset_responses(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		dev_err(&dev->dev, "final FLUSH_SMARTSET_RESPONSES failed, error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 				ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	queue_delayed_work(wq, &priv->work, ELO_PERIODIC_READ_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)  * Not all Elo devices need the periodic HID descriptor reads.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)  * Only firmware version M needs this.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static bool elo_broken_firmware(struct usb_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	struct usb_device *hub = dev->parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct usb_device *child = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	u16 fw_lvl = le16_to_cpu(dev->descriptor.bcdDevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	u16 child_vid, child_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)     
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (!use_fw_quirk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	if (fw_lvl != 0x10d)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	/* iterate sibling devices of the touch controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	usb_hub_for_each_child(hub, i, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		child_vid = le16_to_cpu(child->descriptor.idVendor);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		child_pid = le16_to_cpu(child->descriptor.idProduct);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		 * If one of the devices below is present attached as a sibling of 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		 * the touch controller then  this is a newer IBM 4820 monitor that 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		 * does not need the IBM-requested workaround if fw level is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		 * 0x010d - aka 'M'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		 * No other HW can have this combination.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		if (child_vid==0x04b3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 			switch (child_pid) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 			case 0x4676: /* 4820 21x Video */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 			case 0x4677: /* 4820 51x Video */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 			case 0x4678: /* 4820 2Lx Video */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 			case 0x4679: /* 4820 5Lx Video */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 				return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static int elo_probe(struct hid_device *hdev, const struct hid_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct elo_priv *priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (!hid_is_usb(hdev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (!priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	INIT_DELAYED_WORK(&priv->work, elo_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	priv->usbdev = interface_to_usbdev(to_usb_interface(hdev->dev.parent));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	hid_set_drvdata(hdev, priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	ret = hid_parse(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		hid_err(hdev, "parse failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 		hid_err(hdev, "hw start failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 		goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (elo_broken_firmware(priv->usbdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		hid_info(hdev, "broken firmware found, installing workaround\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		queue_delayed_work(wq, &priv->work, ELO_PERIODIC_READ_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	kfree(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static void elo_remove(struct hid_device *hdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	struct elo_priv *priv = hid_get_drvdata(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	hid_hw_stop(hdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	cancel_delayed_work_sync(&priv->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	kfree(priv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) static const struct hid_device_id elo_devices[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0009), },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	{ HID_USB_DEVICE(USB_VENDOR_ID_ELO, 0x0030), },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	{ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) MODULE_DEVICE_TABLE(hid, elo_devices);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) static struct hid_driver elo_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	.name = "elo",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	.id_table = elo_devices,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	.probe = elo_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	.remove = elo_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	.raw_event = elo_raw_event,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	.input_configured = elo_input_configured,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) static int __init elo_driver_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	wq = create_singlethread_workqueue("elousb");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	if (!wq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	ret = hid_register_driver(&elo_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		destroy_workqueue(wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) module_init(elo_driver_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) static void __exit elo_driver_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	hid_unregister_driver(&elo_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	destroy_workqueue(wq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) module_exit(elo_driver_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) MODULE_AUTHOR("Jiri Slaby <jslaby@suse.cz>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) MODULE_LICENSE("GPL");