1 // SPDX-License-Identifier: GPL-2.0-or-later
4     Copyright (C) 2003-2004  Kevin Thayer <nufan_wfk at yahoo.com>
5     Copyright (C) 2005-2007  Hans Verkuil <hverkuil@xs4all.nl>
11     from the Hauppauge windows driver.  Older ivtv versions used i2c-algo-bit,
13     CPU on the PVR-150 which handles IR functions (occasional inability to
17     The implementation is very similar to i2c-algo-bit, but there are enough
19     employed by i2c-algo-bit is to use udelay() to implement the timing
28     i2c-algo-bit would be to try to make it follow the same code path.
30     provide a generic benefit to i2c-algo-bit.  Therefore consider this
31     an engineering solution -- not pretty, but it works.
50 #include "ivtv-driver.h"
51 #include "ivtv-cards.h"
52 #include "ivtv-gpio.h"
53 #include "ivtv-i2c.h"
54 #include <media/drv-intf/cx25840.h>
129 	"gpio",
137 static int get_key_adaptec(struct IR_i2c *ir, enum rc_proto *protocol,  in get_key_adaptec()  argument
143 	i2c_master_send(ir->c, keybuf, 1);  in get_key_adaptec()
144 	/* poll IR chip */  in get_key_adaptec()
145 	if (i2c_master_recv(ir->c, keybuf, sizeof(keybuf)) != sizeof(keybuf)) {  in get_key_adaptec()
166 	struct i2c_adapter *adap = &itv->i2c_adap;  in ivtv_i2c_new_ir()
167 	struct IR_i2c_init_data *init_data = &itv->ir_i2c_init_data;  in ivtv_i2c_new_ir()
170 	/* Only allow one IR receiver to be registered per board */  in ivtv_i2c_new_ir()
171 	if (itv->hw_flags & IVTV_HW_IR_ANY)  in ivtv_i2c_new_ir()
172 		return -1;  in ivtv_i2c_new_ir()
174 	/* Our default information for ir-kbd-i2c.c to use */  in ivtv_i2c_new_ir()
177 		init_data->ir_codes = RC_MAP_AVERMEDIA_CARDBUS;  in ivtv_i2c_new_ir()
178 		init_data->internal_get_key_func =  in ivtv_i2c_new_ir()
180 		init_data->type = RC_PROTO_BIT_OTHER;  in ivtv_i2c_new_ir()
181 		init_data->name = "AVerMedia AVerTV card";  in ivtv_i2c_new_ir()
185 		init_data->ir_codes = RC_MAP_HAUPPAUGE;  in ivtv_i2c_new_ir()
186 		init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP;  in ivtv_i2c_new_ir()
187 		init_data->type = RC_PROTO_BIT_RC5;  in ivtv_i2c_new_ir()
188 		init_data->name = itv->card_name;  in ivtv_i2c_new_ir()
192 		init_data->ir_codes = RC_MAP_HAUPPAUGE;  in ivtv_i2c_new_ir()
193 		init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;  in ivtv_i2c_new_ir()
194 		init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE |  in ivtv_i2c_new_ir()
196 		init_data->name = itv->card_name;  in ivtv_i2c_new_ir()
199 		init_data->get_key = get_key_adaptec;  in ivtv_i2c_new_ir()
200 		init_data->name = itv->card_name;  in ivtv_i2c_new_ir()
202 		init_data->ir_codes = RC_MAP_EMPTY;  in ivtv_i2c_new_ir()
203 		init_data->type = RC_PROTO_BIT_UNKNOWN;  in ivtv_i2c_new_ir()
212 	       -1 : 0;  in ivtv_i2c_new_ir()
215 /* Instantiate the IR receiver device using probing -- undesirable */
220 	 * The external IR receiver is at i2c address 0x34.  in ivtv_i2c_new_ir_legacy()
221 	 * The internal IR receiver is at i2c address 0x30.  in ivtv_i2c_new_ir_legacy()
231 		0x1a,	/* Hauppauge IR external - collides with WM8739 */  in ivtv_i2c_new_ir_legacy()
232 		0x18,	/* Hauppauge IR internal */  in ivtv_i2c_new_ir_legacy()
238 	i2c_new_scanned_device(&itv->i2c_adap, &info, addr_list, NULL);  in ivtv_i2c_new_ir_legacy()
243 	struct i2c_adapter *adap = &itv->i2c_adap;  in ivtv_i2c_register()
249 		return -ENODEV;  in ivtv_i2c_register()
256 		sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0,  in ivtv_i2c_register()
257 				itv->card_i2c->radio);  in ivtv_i2c_register()
259 			sd->grp_id = 1 << idx;  in ivtv_i2c_register()
260 		sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0,  in ivtv_i2c_register()
261 				itv->card_i2c->demod);  in ivtv_i2c_register()
263 			sd->grp_id = 1 << idx;  in ivtv_i2c_register()
264 		sd = v4l2_i2c_new_subdev(&itv->v4l2_dev, adap, type, 0,  in ivtv_i2c_register()
265 				itv->card_i2c->tv);  in ivtv_i2c_register()
267 			sd->grp_id = 1 << idx;  in ivtv_i2c_register()
268 		return sd ? 0 : -1;  in ivtv_i2c_register()
276 		return -1;  in ivtv_i2c_register()
278 	/* It's an I2C device other than an analog tuner or IR chip */  in ivtv_i2c_register()
280 		sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,  in ivtv_i2c_register()
291 		pdata.pvr150_workaround = itv->pvr150_workaround;  in ivtv_i2c_register()
292 		sd = v4l2_i2c_new_subdev_board(&itv->v4l2_dev, adap,  in ivtv_i2c_register()
295 		sd = v4l2_i2c_new_subdev(&itv->v4l2_dev,  in ivtv_i2c_register()
299 		sd->grp_id = 1 << idx;  in ivtv_i2c_register()
300 	return sd ? 0 : -1;  in ivtv_i2c_register()
308 	spin_lock(&itv->v4l2_dev.lock);  in ivtv_find_hw()
309 	v4l2_device_for_each_subdev(sd, &itv->v4l2_dev) {  in ivtv_find_hw()
310 		if (sd->grp_id == hw) {  in ivtv_find_hw()
315 	spin_unlock(&itv->v4l2_dev.lock);  in ivtv_find_hw()
392 			return -EREMOTEIO;  in ivtv_ack()
400 		ret = -EREMOTEIO;  in ivtv_ack()
405 		ret = -EREMOTEIO;  in ivtv_ack()
420 			return -EREMOTEIO;  in ivtv_sendbyte()
426 			return -EREMOTEIO;  in ivtv_sendbyte()
431 			return -EREMOTEIO;  in ivtv_sendbyte()
437 		return -EREMOTEIO;  in ivtv_sendbyte()
458 			return -EREMOTEIO;  in ivtv_readbyte()
486 			return -EREMOTEIO;  in ivtv_start()
493 			return -EREMOTEIO;  in ivtv_start()
518 		return -EREMOTEIO;  in ivtv_stop()
532 		return -EREMOTEIO;  in ivtv_stop()
541 	int retry, ret = -EREMOTEIO;  in ivtv_write()
564 	int retry, ret = -EREMOTEIO;  in ivtv_read()
572 			ret = ivtv_readbyte(itv, &data[i], i == len - 1);  in ivtv_read()
591 	mutex_lock(&itv->i2c_bus_lock);  in ivtv_xfer()
602 	mutex_unlock(&itv->i2c_bus_lock);  in ivtv_xfer()
617 /* template for our-bit banger */
630 		itv->i2c_state |= 0x01;  in ivtv_setscl_old()
632 		itv->i2c_state &= ~0x01;  in ivtv_setscl_old()
636 	write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSCL_OFFSET);  in ivtv_setscl_old()
644 		itv->i2c_state |= 0x01;  in ivtv_setsda_old()
646 		itv->i2c_state &= ~0x01;  in ivtv_setsda_old()
650 	write_reg(~itv->i2c_state, IVTV_REG_I2C_SETSDA_OFFSET);  in ivtv_setsda_old()
667 /* template for i2c-bit-algo */
670 	.algo = NULL,                   /* set by i2c-algo-bit */
702 		return -ENODEV;  in init_ivtv_i2c()
704 	if (itv->options.newi2c > 0) {  in init_ivtv_i2c()
705 		itv->i2c_adap = ivtv_i2c_adap_hw_template;  in init_ivtv_i2c()
707 		itv->i2c_adap = ivtv_i2c_adap_template;  in init_ivtv_i2c()
708 		itv->i2c_algo = ivtv_i2c_algo_template;  in init_ivtv_i2c()
710 	itv->i2c_algo.udelay = itv->options.i2c_clock_period / 2;  in init_ivtv_i2c()
711 	itv->i2c_algo.data = itv;  in init_ivtv_i2c()
712 	itv->i2c_adap.algo_data = &itv->i2c_algo;  in init_ivtv_i2c()
714 	sprintf(itv->i2c_adap.name + strlen(itv->i2c_adap.name), " #%d",  in init_ivtv_i2c()
715 		itv->instance);  in init_ivtv_i2c()
716 	i2c_set_adapdata(&itv->i2c_adap, &itv->v4l2_dev);  in init_ivtv_i2c()
718 	itv->i2c_client = ivtv_i2c_client_template;  in init_ivtv_i2c()
719 	itv->i2c_client.adapter = &itv->i2c_adap;  in init_ivtv_i2c()
720 	itv->i2c_adap.dev.parent = &itv->pdev->dev;  in init_ivtv_i2c()
726 	if (itv->options.newi2c > 0)  in init_ivtv_i2c()
727 		retval = i2c_add_adapter(&itv->i2c_adap);  in init_ivtv_i2c()
729 		retval = i2c_bit_add_bus(&itv->i2c_adap);  in init_ivtv_i2c()
738 	i2c_del_adapter(&itv->i2c_adap);  in exit_ivtv_i2c()