input/keyboard/jornada720_kbd.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * drivers/input/keyboard/jornada720_kbd.c
0004  *
0005  * HP Jornada 720 keyboard platform driver
0006  *
0007  * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@Gmail.com>
0008  *
0009  *    Copyright (C) 2006 jornada 720 kbd driver by
0010         Filip Zyzniewsk <Filip.Zyzniewski@tefnet.plX
0011  *     based on (C) 2004 jornada 720 kbd driver by
0012         Alex Lange <chicken@handhelds.org>
0013  */
0014 #include <linux/device.h>
0015 #include <linux/errno.h>
0016 #include <linux/interrupt.h>
0017 #include <linux/input.h>
0018 #include <linux/kernel.h>
0019 #include <linux/module.h>
0020 #include <linux/platform_device.h>
0021 #include <linux/slab.h>
0022
0023 #include <mach/jornada720.h>
0024
0025 MODULE_AUTHOR("Kristoffer Ericson <Kristoffer.Ericson@gmail.com>");
0026 MODULE_DESCRIPTION("HP Jornada 710/720/728 keyboard driver");
0027 MODULE_LICENSE("GPL v2");
0028
0029 static unsigned short jornada_std_keymap[128] = {                   /* ROW */
0030     0, KEY_ESC, KEY_F1, KEY_F2, KEY_F3, KEY_F4, KEY_F5, KEY_F6, KEY_F7,     /* #1  */
0031     KEY_F8, KEY_F9, KEY_F10, KEY_F11, KEY_VOLUMEUP, KEY_VOLUMEDOWN, KEY_MUTE,   /*  -> */
0032     0, KEY_1, KEY_2, KEY_3, KEY_4, KEY_5, KEY_6, KEY_7, KEY_8, KEY_9,       /* #2  */
0033     KEY_0, KEY_MINUS, KEY_EQUAL,0, 0, 0,                        /*  -> */
0034     0, KEY_Q, KEY_W, KEY_E, KEY_R, KEY_T, KEY_Y, KEY_U, KEY_I, KEY_O,       /* #3  */
0035     KEY_P, KEY_BACKSLASH, KEY_BACKSPACE, 0, 0, 0,                   /*  -> */
0036     0, KEY_A, KEY_S, KEY_D, KEY_F, KEY_G, KEY_H, KEY_J, KEY_K, KEY_L,       /* #4  */
0037     KEY_SEMICOLON, KEY_LEFTBRACE, KEY_RIGHTBRACE, 0, 0, 0,              /*  -> */
0038     0, KEY_Z, KEY_X, KEY_C, KEY_V, KEY_B, KEY_N, KEY_M, KEY_COMMA,          /* #5  */
0039     KEY_DOT, KEY_KPMINUS, KEY_APOSTROPHE, KEY_ENTER, 0, 0,0,            /*  -> */
0040     0, KEY_TAB, 0, KEY_LEFTSHIFT, 0, KEY_APOSTROPHE, 0, 0, 0, 0,            /* #6  */
0041     KEY_UP, 0, KEY_RIGHTSHIFT, 0, 0, 0,0, 0, 0, 0, 0, KEY_LEFTALT, KEY_GRAVE,   /*  -> */
0042     0, 0, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0,0, KEY_KPASTERISK,      /*  -> */
0043     KEY_LEFTCTRL, 0, KEY_SPACE, 0, 0, 0, KEY_SLASH, KEY_DELETE, 0, 0,       /*  -> */
0044     0, 0, 0, KEY_POWER,                             /*  -> */
0045 };
0046
0047 struct jornadakbd {
0048     unsigned short keymap[ARRAY_SIZE(jornada_std_keymap)];
0049     struct input_dev *input;
0050 };
0051
0052 static irqreturn_t jornada720_kbd_interrupt(int irq, void *dev_id)
0053 {
0054     struct platform_device *pdev = dev_id;
0055     struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
0056     struct input_dev *input = jornadakbd->input;
0057     u8 count, kbd_data, scan_code;
0058
0059     /* startup ssp with spinlock */
0060     jornada_ssp_start();
0061
0062     if (jornada_ssp_inout(GETSCANKEYCODE) != TXDUMMY) {
0063         dev_dbg(&pdev->dev,
0064             "GetKeycode command failed with ETIMEDOUT, flushed bus\n");
0065     } else {
0066         /* How many keycodes are waiting for us? */
0067         count = jornada_ssp_byte(TXDUMMY);
0068
0069         /* Lets drag them out one at a time */
0070         while (count--) {
0071             /* Exchange TxDummy for location (keymap[kbddata]) */
0072             kbd_data = jornada_ssp_byte(TXDUMMY);
0073             scan_code = kbd_data & 0x7f;
0074
0075             input_event(input, EV_MSC, MSC_SCAN, scan_code);
0076             input_report_key(input, jornadakbd->keymap[scan_code],
0077                      !(kbd_data & 0x80));
0078             input_sync(input);
0079         }
0080     }
0081
0082     /* release spinlock and turn off ssp */
0083     jornada_ssp_end();
0084
0085     return IRQ_HANDLED;
0086 };
0087
0088 static int jornada720_kbd_probe(struct platform_device *pdev)
0089 {
0090     struct jornadakbd *jornadakbd;
0091     struct input_dev *input_dev;
0092     int i, err, irq;
0093
0094     irq = platform_get_irq(pdev, 0);
0095     if (irq <= 0)
0096         return irq < 0 ? irq : -EINVAL;
0097
0098     jornadakbd = devm_kzalloc(&pdev->dev, sizeof(*jornadakbd), GFP_KERNEL);
0099     input_dev = devm_input_allocate_device(&pdev->dev);
0100     if (!jornadakbd || !input_dev)
0101         return -ENOMEM;
0102
0103     platform_set_drvdata(pdev, jornadakbd);
0104
0105     memcpy(jornadakbd->keymap, jornada_std_keymap,
0106         sizeof(jornada_std_keymap));
0107     jornadakbd->input = input_dev;
0108
0109     input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
0110     input_dev->name = "HP Jornada 720 keyboard";
0111     input_dev->phys = "jornadakbd/input0";
0112     input_dev->keycode = jornadakbd->keymap;
0113     input_dev->keycodesize = sizeof(unsigned short);
0114     input_dev->keycodemax = ARRAY_SIZE(jornada_std_keymap);
0115     input_dev->id.bustype = BUS_HOST;
0116     input_dev->dev.parent = &pdev->dev;
0117
0118     for (i = 0; i < ARRAY_SIZE(jornadakbd->keymap); i++)
0119         __set_bit(jornadakbd->keymap[i], input_dev->keybit);
0120     __clear_bit(KEY_RESERVED, input_dev->keybit);
0121
0122     input_set_capability(input_dev, EV_MSC, MSC_SCAN);
0123
0124     err = devm_request_irq(&pdev->dev, irq, jornada720_kbd_interrupt,
0125                    IRQF_TRIGGER_FALLING, "jornadakbd", pdev);
0126     if (err) {
0127         dev_err(&pdev->dev, "unable to grab IRQ%d: %d\n", irq, err);
0128         return err;
0129     }
0130
0131     return input_register_device(jornadakbd->input);
0132 };
0133
0134 /* work with hotplug and coldplug */
0135 MODULE_ALIAS("platform:jornada720_kbd");
0136
0137 static struct platform_driver jornada720_kbd_driver = {
0138     .driver  = {
0139         .name    = "jornada720_kbd",
0140      },
0141     .probe   = jornada720_kbd_probe,
0142 };
0143 module_platform_driver(jornada720_kbd_driver);