5  * SPDX-License-Identifier:	GPL-2.0+
8 /* i8042.c - Intel 8042 keyboard driver routines */
15 #include <keyboard.h>
58 	while ((in8(I8042_STS_REG) & STATUS_IBF) && kbd_timeout--)  in kbd_input_empty()
61 	return kbd_timeout != -1;  in kbd_input_empty()
68 	while (((in8(I8042_STS_REG) & STATUS_OBF) == 0) && kbd_timeout--)  in kbd_output_full()
71 	return kbd_timeout != -1;  in kbd_output_full()
75  * check_leds() - Check the keyboard LEDs and update them it needed
93 		return -1;  in kbd_write()
102 		return -1;  in kbd_read()
110 		return -1;  in kbd_cmd_read()
118 		return -1;  in kbd_cmd_write()
127 	/* controller self test */  in kbd_reset()
131 	/* keyboard reset */  in kbd_reset()
143 	if (config == -1)  in kbd_reset()
155 	/* enable keyboard */  in kbd_reset()
162 	debug("%s: Keyboard failure\n", __func__);  in kbd_reset()
163 	return -1;  in kbd_reset()
188 	 * The delay is to give the keyboard controller some time  in i8042_flush()
195 			timeout--;  in i8042_flush()
209 		return -1;  in i8042_disable()
211 	/* Disable keyboard */  in i8042_disable()
215 		return -1;  in i8042_disable()
222 	struct i8042_kbd_priv *priv = dev_get_priv(input->dev);  in i8042_kbd_check()
235 			priv->extended = true;  in i8042_kbd_check()
242 		if (priv->extended) {  in i8042_kbd_check()
243 			priv->extended = false;  in i8042_kbd_check()
260 /* i8042_kbd_init - reset keyboard and init state flags */
265 	struct input_config *input = &uc_priv->input;  in i8042_start()
271 		debug("i8042 keyboard controller is not present\n");  in i8042_start()
272 		return -ENOENT;  in i8042_start()
275 	/* Init keyboard device (default US layout) */  in i8042_start()
283 	for (try = 0; kbd_reset(priv->quirks) != 0; try++) {  in i8042_start()
285 			return -1;  in i8042_start()
299  * Set up the i8042 keyboard. This is called by the stdio device handler
301  * We want to do this init when the keyboard is actually used rather than
302  * at start-up, since keyboard input may not currently be selected.
304  * Once the keyboard starts there will be a period during which we must
305  * wait for the keyboard to init. We do this only when a key is first
306  * read - see kbd_wait_for_fifo_init().
308  * @return 0 if ok, -ve on error
314 	struct stdio_dev *sdev = &uc_priv->sdev;  in i8042_kbd_probe()
315 	struct input_config *input = &uc_priv->input;  in i8042_kbd_probe()
318 	if (fdtdec_get_bool(gd->fdt_blob, dev_of_offset(dev),  in i8042_kbd_probe()
319 			    "intel,duplicate-por"))  in i8042_kbd_probe()
320 		priv->quirks |= QUIRK_DUP_POR;  in i8042_kbd_probe()
323 	input->dev = dev;  in i8042_kbd_probe()
324 	input->read_keys = i8042_kbd_check;  in i8042_kbd_probe()
326 	strcpy(sdev->name, "i8042-kbd");  in i8042_kbd_probe()
343 	{ .compatible = "intel,i8042-keyboard" },