4  *  Derived from ivtv-gpio.c
20 #include "cx18-driver.h"
21 #include "cx18-io.h"
22 #include "cx18-cards.h"
23 #include "cx18-gpio.h"
24 #include "tuner-xc2028.h"
36  * HVR-1600 GPIO pins, courtesy of Hauppauge:
38  * gpio0: zilog ir process reset pin
40  * gpio12: cx24227 reset pin
41  * gpio13: cs5345 reset pin
49 	u32 dir_lo = cx->gpio_dir & 0xffff;  in gpio_write()
50 	u32 val_lo = cx->gpio_val & 0xffff;  in gpio_write()
51 	u32 dir_hi = cx->gpio_dir >> 16;  in gpio_write()
52 	u32 val_hi = cx->gpio_val >> 16;  in gpio_write()
64 static void gpio_update(struct cx18 *cx, u32 mask, u32 data)  in gpio_update()  argument
66 	if (mask == 0)  in gpio_update()
69 	mutex_lock(&cx->gpio_lock);  in gpio_update()
70 	cx->gpio_val = (cx->gpio_val & ~mask) | (data & mask);  in gpio_update()
72 	mutex_unlock(&cx->gpio_lock);  in gpio_update()
79 	u32 mask;  in gpio_reset_seq()  local
81 	mask = active_lo | active_hi;  in gpio_reset_seq()
82 	if (mask == 0)  in gpio_reset_seq()
92 	gpio_update(cx, mask, ~active_lo);  in gpio_reset_seq()
96 	gpio_update(cx, mask, ~active_hi);  in gpio_reset_seq()
101  * GPIO Multiplexer - logical device
107 	mutex_lock(&cx->gpio_lock);  in gpiomux_log_status()
109 		      cx->gpio_dir, cx->gpio_val);  in gpiomux_log_status()
110 	mutex_unlock(&cx->gpio_lock);  in gpiomux_log_status()
119 	 * FIXME - work out the cx->active/audio_input mess - this is  in gpiomux_s_radio()
123 	gpio_update(cx, cx->card->gpio_audio_input.mask,  in gpiomux_s_radio()
124 			cx->card->gpio_audio_input.radio);  in gpiomux_s_radio()
133 	switch (cx->card->audio_inputs[cx->audio_input].muxer_input) {  in gpiomux_s_std()
135 		data = cx->card->gpio_audio_input.linein;  in gpiomux_s_std()
138 		data = cx->card->gpio_audio_input.tuner;  in gpiomux_s_std()
142 		 * FIXME - work out the cx->active/audio_input mess - this is  in gpiomux_s_std()
146 		data = cx->card->gpio_audio_input.tuner;  in gpiomux_s_std()
149 	gpio_update(cx, cx->card->gpio_audio_input.mask, data);  in gpiomux_s_std()
161 		data = cx->card->gpio_audio_input.tuner;  in gpiomux_s_audio_routing()
164 		data = cx->card->gpio_audio_input.linein;  in gpiomux_s_audio_routing()
167 		data = cx->card->gpio_audio_input.radio;  in gpiomux_s_audio_routing()
170 		return -EINVAL;  in gpiomux_s_audio_routing()
172 	gpio_update(cx, cx->card->gpio_audio_input.mask, data);  in gpiomux_s_audio_routing()
200  * GPIO Reset Controller - logical device
206 	mutex_lock(&cx->gpio_lock);  in resetctrl_log_status()
208 		      cx->gpio_dir, cx->gpio_val);  in resetctrl_log_status()
209 	mutex_unlock(&cx->gpio_lock);  in resetctrl_log_status()
218 	p = &cx->card->gpio_i2c_slave_reset;  in resetctrl_reset()
221 		gpio_reset_seq(cx, p->active_lo_mask, p->active_hi_mask,  in resetctrl_reset()
222 			       p->msecs_asserted, p->msecs_recovery);  in resetctrl_reset()
226 		 * Assert timing for the Z8F0811 on HVR-1600 boards:  in resetctrl_reset()
227 		 * 1. Assert RESET for min of 4 clock cycles at 18.432 MHz to  in resetctrl_reset()
229 		 * 2. Reset then takes 66 WDT cycles at 10 kHz + 16 xtal clock  in resetctrl_reset()
231 		 * 3. DBG pin must be high before chip exits reset for normal  in resetctrl_reset()
234 		 *    HVR-1600  in resetctrl_reset()
235 		 * 4. Z8F0811 won't exit reset until RESET is deasserted  in resetctrl_reset()
236 		 * 5. Zilog comes out of reset, loads reset vector address and  in resetctrl_reset()
239 		gpio_reset_seq(cx, p->ir_reset_mask, 0,  in resetctrl_reset()
240 			       p->msecs_asserted, p->msecs_recovery);  in resetctrl_reset()
243 		if (cx->card->tuners[0].tuner == TUNER_XC2028)  in resetctrl_reset()
244 			gpio_reset_seq(cx, (1 << cx->card->xceive_pin), 0,  in resetctrl_reset()
253 	.reset = resetctrl_reset,
265 	mutex_lock(&cx->gpio_lock);  in cx18_gpio_init()
266 	cx->gpio_dir = cx->card->gpio_init.direction;  in cx18_gpio_init()
267 	cx->gpio_val = cx->card->gpio_init.initial_value;  in cx18_gpio_init()
269 	if (cx->card->tuners[0].tuner == TUNER_XC2028) {  in cx18_gpio_init()
270 		cx->gpio_dir |= 1 << cx->card->xceive_pin;  in cx18_gpio_init()
271 		cx->gpio_val |= 1 << cx->card->xceive_pin;  in cx18_gpio_init()
274 	if (cx->gpio_dir == 0) {  in cx18_gpio_init()
275 		mutex_unlock(&cx->gpio_lock);  in cx18_gpio_init()
286 	mutex_unlock(&cx->gpio_lock);  in cx18_gpio_init()
297 		sd = &cx->sd_gpiomux;  in cx18_gpio_register()
299 		str = "gpio-mux";  in cx18_gpio_register()
302 		sd = &cx->sd_resetctrl;  in cx18_gpio_register()
304 		str = "gpio-reset-ctrl";  in cx18_gpio_register()
307 		return -EINVAL;  in cx18_gpio_register()
312 	snprintf(sd->name, sizeof(sd->name), "%s %s", cx->v4l2_dev.name, str);  in cx18_gpio_register()
313 	sd->grp_id = hw;  in cx18_gpio_register()
314 	return v4l2_device_register_subdev(&cx->v4l2_dev, sd);  in cx18_gpio_register()
321 	if (cx->card->gpio_i2c_slave_reset.ir_reset_mask == 0)  in cx18_reset_ir_gpio()
326 	v4l2_subdev_call(&cx->sd_resetctrl,  in cx18_reset_ir_gpio()
327 			 core, reset, CX18_GPIO_RESET_Z8F0811);  in cx18_reset_ir_gpio()
330 /* This symbol is exported for use by lirc_pvr150 for the IR-blaster */
332 /* Xceive tuner reset function */
336 	struct cx18_i2c_algo_callback_data *cb_data = algo->data;  in cx18_reset_tuner_gpio()
337 	struct cx18 *cx = cb_data->cx;  in cx18_reset_tuner_gpio()
340 	    cx->card->tuners[0].tuner != TUNER_XC2028)  in cx18_reset_tuner_gpio()
344 	return v4l2_subdev_call(&cx->sd_resetctrl,  in cx18_reset_tuner_gpio()
345 				core, reset, CX18_GPIO_RESET_XC2028);  in cx18_reset_tuner_gpio()