drivers/staging/nvec/nvec_kbd.c

   1 #include <linux/slab.h>
   2 #include <linux/input.h>
   3 #include <linux/delay.h>
   4 #include "nvec-keytable.h"
   5 #include "nvec.h"
   6
   7 #define ACK_KBD_EVENT {'\x05','\xed','\x01'}
   8
   9 static unsigned char keycodes[ARRAY_SIZE(code_tab_102us)
  10                         + ARRAY_SIZE(extcode_tab_us102)];
  11
  12 struct nvec_keys {
  13         struct input_dev *input;
  14         struct notifier_block notifier;
  15         struct nvec_chip *nvec;
  16 };
  17
  18 static struct nvec_keys keys_dev;
  19
  20 static int nvec_keys_notifier(struct notifier_block *nb,
  21                                 unsigned long event_type, void *data)
  22 {
  23         int code, state;
  24         unsigned char *msg = (unsigned char *)data;
  25
  26         if (event_type == NVEC_KB_EVT) {
  27                 nvec_size _size = (msg[0] & (3 << 5)) >> 5;
  28
  29 /* power on/off button */
  30                 if(_size == NVEC_VAR_SIZE)
  31                         return NOTIFY_STOP;
  32
  33                 if(_size == NVEC_3BYTES)
  34                         msg++;
  35
  36                 code = msg[1] & 0x7f;
  37                 state = msg[1] & 0x80;
  38
  39                 input_report_key(keys_dev.input, code_tabs[_size][code], !state);
  40                 input_sync(keys_dev.input);
  41
  42                 return NOTIFY_STOP;
  43         }
  44
  45         return NOTIFY_DONE;
  46 }
  47
  48 static int nvec_kbd_event(struct input_dev *dev, unsigned int type,
  49                                 unsigned int code, int value)
  50 {
  51         unsigned char buf[] = ACK_KBD_EVENT;
  52         struct nvec_chip *nvec = keys_dev.nvec;
  53
  54         if(type==EV_REP)
  55                 return 0;
  56
  57         if(type!=EV_LED)
  58                 return -1;
  59
  60         if(code!=LED_CAPSL)
  61                 return -1;
  62
  63         buf[2] = !!value;
  64         nvec_write_async(nvec, buf, sizeof(buf));
  65
  66         return 0;
  67 }
  68
  69 int __init nvec_kbd_init(struct nvec_chip *nvec)
  70 {
  71         int i, j, err;
  72         struct input_dev *idev;
  73
  74         j = 0;
  75
  76         for(i = 0; i < ARRAY_SIZE(code_tab_102us); ++i)
  77                 keycodes[j++] = code_tab_102us[i];
  78
  79         for(i = 0; i < ARRAY_SIZE(extcode_tab_us102); ++i)
  80                 keycodes[j++]=extcode_tab_us102[i];
  81
  82         idev = input_allocate_device();
  83         idev->name = "Tegra nvec keyboard";
  84         idev->phys = "i2c3_slave/nvec";
  85         idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_LED);
  86         idev->ledbit[0] = BIT_MASK(LED_CAPSL);
  87         idev->event = nvec_kbd_event;
  88         idev->keycode = keycodes;
  89         idev->keycodesize = sizeof(unsigned char);
  90         idev->keycodemax = ARRAY_SIZE(keycodes);
  91
  92         for( i = 0; i < ARRAY_SIZE(keycodes); ++i)
  93                 set_bit(keycodes[i], idev->keybit);
  94
  95         clear_bit(0, idev->keybit);
  96         err = input_register_device(idev);
  97         if(err)
  98                 goto fail;
  99
 100         keys_dev.input = idev;
 101         keys_dev.notifier.notifier_call = nvec_keys_notifier;
 102         keys_dev.nvec = nvec;
 103         nvec_register_notifier(nvec, &keys_dev.notifier, 0);
 104
 105         /* Enable keyboard */
 106         nvec_write_async(nvec, "\x05\xf4", 2);
 107
 108         /* keyboard reset? */
 109         nvec_write_async(nvec, "\x05\x03\x01\x01", 4);
 110         nvec_write_async(nvec, "\x05\x04\x01", 3);
 111         nvec_write_async(nvec, "\x06\x01\xff\x03", 4);
 112 /*      FIXME
 113         wait until keyboard reset is finished
 114         or until we have a sync write */
 115         mdelay(1000);
 116
 117         return 0;
 118
 119 fail:
 120         input_free_device(idev);
 121         return err;
 122 }