Polling structure used by em28xx IR's
**********************************************************/
+struct em28xx_ir_poll_result {
+ unsigned int toggle_bit:1;
+ unsigned int read_count:7;
+ u8 rc_address;
+ u8 rc_data[4]; /* 1 byte on em2860/2880, 4 on em2874 */
+};
+
struct em28xx_IR {
struct em28xx *dev;
struct input_dev *input;
int polling;
struct work_struct work;
struct timer_list timer;
- u32 last_gpio;
- u32 mask_keycode;
- u32 mask_keydown;
- u32 mask_keyup;
- u32 mask_repeat;
+ unsigned int last_toggle:1;
+ unsigned int last_readcount;
+ unsigned int repeat_interval;
- int (*get_key)(struct em28xx_IR *);
+ int (*get_key)(struct em28xx_IR *, struct em28xx_ir_poll_result *);
};
/**********************************************************
Poll based get keycode functions
**********************************************************/
-static int default_polling_getkey(struct em28xx_IR *ir)
+/* This is for the em2860/em2880 */
+static int default_polling_getkey(struct em28xx_IR *ir,
+ struct em28xx_ir_poll_result *poll_result)
{
struct em28xx *dev = ir->dev;
int rc;
- u8 msg[4] = { 0, 0, 0, 0 };
+ u8 msg[3] = { 0, 0, 0 };
/* Read key toggle, brand, and key code
on registers 0x45, 0x46 and 0x47
if (rc < 0)
return rc;
- return (int)(le32_to_cpu(*(u32 *)msg));
+ /* Infrared toggle (Reg 0x45[7]) */
+ poll_result->toggle_bit = (msg[0] >> 7);
+
+ /* Infrared read count (Reg 0x45[6:0] */
+ poll_result->read_count = (msg[0] & 0x7f);
+
+ /* Remote Control Address (Reg 0x46) */
+ poll_result->rc_address = msg[1];
+
+ /* Remote Control Data (Reg 0x47) */
+ poll_result->rc_data[0] = msg[2];
+
+ return 0;
+}
+
+static int em2874_polling_getkey(struct em28xx_IR *ir,
+ struct em28xx_ir_poll_result *poll_result)
+{
+ struct em28xx *dev = ir->dev;
+ int rc;
+ u8 msg[5] = { 0, 0, 0, 0, 0 };
+
+ /* Read key toggle, brand, and key code
+ on registers 0x51-55
+ */
+ rc = dev->em28xx_read_reg_req_len(dev, 0, EM2874_R51_IR,
+ msg, sizeof(msg));
+ if (rc < 0)
+ return rc;
+
+ /* Infrared toggle (Reg 0x51[7]) */
+ poll_result->toggle_bit = (msg[0] >> 7);
+
+ /* Infrared read count (Reg 0x51[6:0] */
+ poll_result->read_count = (msg[0] & 0x7f);
+
+ /* Remote Control Address (Reg 0x52) */
+ poll_result->rc_address = msg[1];
+
+ /* Remote Control Data (Reg 0x53-55) */
+ poll_result->rc_data[0] = msg[2];
+ poll_result->rc_data[1] = msg[3];
+ poll_result->rc_data[2] = msg[4];
+
+ return 0;
}
/**********************************************************
static void em28xx_ir_handle_key(struct em28xx_IR *ir)
{
- int gpio;
- u32 data;
-
- /* read gpio value */
- gpio = ir->get_key(ir);
- if (gpio < 0)
+ int result;
+ int do_sendkey = 0;
+ struct em28xx_ir_poll_result poll_result;
+
+ /* read the registers containing the IR status */
+ result = ir->get_key(ir, &poll_result);
+ if (result < 0) {
+ dprintk("ir->get_key() failed %d\n", result);
return;
+ }
- if (gpio == ir->last_gpio)
- return;
+ dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x\n",
+ poll_result.toggle_bit, poll_result.read_count,
+ ir->last_readcount, poll_result.rc_data[0]);
+
+ if (ir->dev->chip_id == CHIP_ID_EM2874) {
+ /* The em2874 clears the readcount field every time the
+ register is read. The em2860/2880 datasheet says that it
+ is supposed to clear the readcount, but it doesn't. So with
+ the em2874, we are looking for a non-zero read count as
+ opposed to a readcount that is incrementing */
+ ir->last_readcount = 0;
+ }
- ir->last_gpio = gpio;
-
- /* extract data */
- data = ir_extract_bits(gpio, ir->mask_keycode);
- dprintk("irq gpio=0x%x code=%d | poll%s%s\n",
- gpio, data,
- (gpio & ir->mask_keydown) ? " down" : "",
- (gpio & ir->mask_keyup) ? " up" : "");
-
- /* Generate keyup/keydown events */
- if (ir->mask_keydown) {
- /* bit set on keydown */
- if (gpio & ir->mask_keydown)
- ir_input_keydown(ir->input, &ir->ir, data, data);
- else
- ir_input_nokey(ir->input, &ir->ir);
- } else if (ir->mask_keyup) {
- /* bit cleared on keydown */
- if (!(gpio & ir->mask_keyup))
- ir_input_keydown(ir->input, &ir->ir, data, data);
- else
- ir_input_nokey(ir->input, &ir->ir);
- } else if (ir->mask_repeat) {
- int count = ir->mask_repeat & gpio;
-
- /* Avoid keyboard bouncing */
- if ((count == 1) || (count >= 5)) {
- ir_input_keydown(ir->input, &ir->ir, data, data);
- ir_input_nokey(ir->input, &ir->ir);
+ if (poll_result.read_count == 0) {
+ /* The button has not been pressed since the last read */
+ } else if (ir->last_toggle != poll_result.toggle_bit) {
+ /* A button has been pressed */
+ dprintk("button has been pressed\n");
+ ir->last_toggle = poll_result.toggle_bit;
+ ir->repeat_interval = 0;
+ do_sendkey = 1;
+ } else if (poll_result.toggle_bit == ir->last_toggle &&
+ poll_result.read_count > 0 &&
+ poll_result.read_count != ir->last_readcount) {
+ /* The button is still being held down */
+ dprintk("button being held down\n");
+
+ /* Debouncer for first keypress */
+ if (ir->repeat_interval++ > 9) {
+ /* Start repeating after 1 second */
+ do_sendkey = 1;
}
- } else {
- /* can't distinguish keydown/up :-/ */
- ir_input_keydown(ir->input, &ir->ir, data, data);
+ }
+
+ if (do_sendkey) {
+ dprintk("sending keypress\n");
+ ir_input_keydown(ir->input, &ir->ir, poll_result.rc_data[0],
+ poll_result.rc_data[0]);
ir_input_nokey(ir->input, &ir->ir);
}
+
+ ir->last_readcount = poll_result.read_count;
+ return;
}
static void ir_timer(unsigned long data)
{
struct em28xx_IR *ir;
struct input_dev *input_dev;
- IR_KEYTAB_TYPE *ir_codes = NULL;
- int ir_type = IR_TYPE_OTHER;
+ u8 ir_config;
int err = -ENOMEM;
+ if (dev->ir_codes == NULL) {
+ /* No remote control support */
+ return 0;
+ }
+
ir = kzalloc(sizeof(*ir), GFP_KERNEL);
input_dev = input_allocate_device();
if (!ir || !input_dev)
ir->input = input_dev;
- /* */
- ir->get_key = default_polling_getkey;
- ir->polling = 50; /* ms */
-
- /* detect & configure */
- switch (dev->model) {
- case EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950:
- ir_type = IR_TYPE_OTHER;
- ir_codes = ir_codes_hauppauge_new;
- ir->mask_keycode = 0x007f0000;
- ir->mask_repeat = 0x0000007f;
+ /* Setup the proper handler based on the chip */
+ switch (dev->chip_id) {
+ case CHIP_ID_EM2860:
+ case CHIP_ID_EM2883:
+ ir->get_key = default_polling_getkey;
break;
- }
-
- if (NULL == ir_codes) {
- err = -ENODEV;
+ case CHIP_ID_EM2874:
+ ir->get_key = em2874_polling_getkey;
+ /* For now we only support RC5, so enable it */
+ ir_config = EM2874_IR_RC5;
+ em28xx_write_regs(dev, EM2874_R50_IR_CONFIG, &ir_config, 1);
+ break;
+ default:
+ printk("Unrecognized em28xx chip id: IR not supported\n");
goto err_out_free;
}
+ /* This is how often we ask the chip for IR information */
+ ir->polling = 100; /* ms */
+
/* init input device */
snprintf(ir->name, sizeof(ir->name), "em28xx IR (%s)",
dev->name);
usb_make_path(dev->udev, ir->phys, sizeof(ir->phys));
strlcat(ir->phys, "/input0", sizeof(ir->phys));
- ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
+ ir_input_init(input_dev, &ir->ir, IR_TYPE_OTHER, dev->ir_codes);
input_dev->name = ir->name;
input_dev->phys = ir->phys;
input_dev->id.bustype = BUS_USB;
ir->dev = dev;
dev->ir = ir;
- /* Get the current key status, to avoid adding an
- unexistent key code */
- ir->last_gpio = ir->get_key(ir);
-
em28xx_ir_start(ir);
/* all done */
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff