text: // SPDX-License-Identifier: GPL-2.0-only
  /*
   * drivers/input/keyboard/jornada720_kbd.c
   *
   * HP Jornada 720 keyboard platform driver
   *
   * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
   *
   *    Copyright (C) 2006 jornada 720 kbd driver by
  		Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
   *     based on (C) 2004 jornada 720 kbd driver by
  		Alex Lange <chicken@handhelds.org>
   */
  #include <linux/device.h>
  #include <linux/errno.h>
  #include <linux/interrupt.h>
  #include <linux/input.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/platform_device.h>
  #include <linux/slab.h>
  
  #include <mach/jornada720.h>
  
  MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
  MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
  MODULE_LICENSE("GPL v2");
  
  static unsigned short jornada_std_keymap[128] = {					/* ROW */
  	0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,		/* #1  */
  	KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,	/*  -> */
  	0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,		/* #2  */
  	KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,						/*  -> */
  	0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,		/* #3  */
  	KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,					/*  -> */
  	0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,		/* #4  */
  	KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,				/*  -> */
  	0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,			/* #5  */
  	KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,			/*  -> */
  	0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,			/* #6  */
  	KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,	/*  -> */
  	0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,		/*  -> */
  	KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,		/*  -> */
  	0, 0, 0, KEY_POWER,								/*  -> */
  };
  
  struct jornadakbd {
  	unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
  	struct input_dev *input;
  };
  
  static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
  {
  	struct platform_device *pdev = dev_id;
  	struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
  	struct input_dev *input = jornadakbd->input;
  	u8 count, kbd_data, scan_code;
  
  	/* startup ssp with spinlock */
  	jornada_ssp_start();
  
  	if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
  		dev_dbg(&pdev->dev,
  			"GetKeycode command failed with ETIMEDOUT, flushed bus\n");
  	} else {
  		/* How many keycodes are waiting for us? */
  		count = jornada_ssp_byte(TXDUMMY);
  
  		/* Lets drag them out one at a time */
  		while (count--) {
  			/* Exchange TxDummy for location (keymap[kbddata]) */
  			kbd_data = jornada_ssp_byte(TXDUMMY);
  			scan_code = kbd_data & 0x7f;
  
  			input_event(input, EV_MSC, MSC_SCAN, scan_code);
  			input_report_key(input, jornadakbd->keymap[scan_code],
  					 !(kbd_data & 0x80));
  			input_sync(input);
  		}
  	}
  
  	/* release spinlock and turn off ssp */
  	jornada_ssp_end();
  
  	return IRQ_HANDLED;
  };
  
  static int jornada720_kbd_probe(struct platform_device *pdev)
  {
  	struct jornadakbd *jornadakbd;
  	struct input_dev *input_dev;
  	int i, err, irq;
  
  	irq = platform_get_irq(pdev, 0);
  	if (irq <= 0)
  		return irq < 0 ? irq : -EINVAL;
  
  	jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL);
  	input_dev = devm_input_allocate_device(&pdev->dev);
  	if (!jornadakbd || !input_dev)
  		return -ENOMEM;
  
  	platform_set_drvdata(pdev, jornadakbd);
  
  	memcpy(jornadakbd->keymap, jornada_std_keymap,
  		sizeof(jornada_std_keymap));
  	jornadakbd->input = input_dev;
  
  	input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
  	input_dev->name = "HP Jornada 720 keyboard";
  	input_dev->phys = "jornadakbd/input0";
  	input_dev->keycode = jornadakbd->keymap;
  	input_dev->keycodesize = sizeof(unsigned short);
  	input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
  	input_dev->id.bustype = BUS_HOST;
  	input_dev->dev.parent = &pdev->dev;
  
  	for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
  		__set_bit(jornadakbd->keymap[i], input_dev->keybit);
  	__clear_bit(KEY_RESERVED, input_dev->keybit);
  
  	input_set_capability(input_dev, EV_MSC, MSC_SCAN);
  
  	err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt,
  			       IRQF_TRIGGER_FALLING, "jornadakbd", pdev);
  	if (err) {
  		dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err);
  		return err;
  	}
  
  	return input_register_device(jornadakbd->input);
  };
  
  /* work with hotplug and coldplug */
  MODULE_ALIAS("platform:jornada720_kbd");
  
  static struct platform_driver jornada720_kbd_driver = {
  	.driver  = {
  		.name    = "jornada720_kbd",
  	 },
  	.probe   = jornada720_kbd_probe,
  };
  module_platform_driver(jornada720_kbd_driver);
  