[deliverable/linux.git] / drivers / gpu / drm / nouveau / core / subdev / i2c / base.c

/*
 * Copyright 2013 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include <core/option.h>

#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/bios/i2c.h>
#include <subdev/vga.h>

#include "priv.h"

/******************************************************************************
 * interface to linux i2c bit-banging algorithm
 *****************************************************************************/

#ifdef CONFIG_NOUVEAU_I2C_INTERNAL_DEFAULT
#define CSTMSEL true
#else
#define CSTMSEL false
#endif

static int
nouveau_i2c_pre_xfer(struct i2c_adapter *adap)
{
	struct i2c_algo_bit_data *bit = adap->algo_data;
	struct nouveau_i2c_port *port = bit->data;
	if (port->func->acquire)
		port->func->acquire(port);
	return 0;
}

static void
nouveau_i2c_setscl(void *data, int state)
{
	struct nouveau_i2c_port *port = data;
	port->func->drive_scl(port, state);
}

static void
nouveau_i2c_setsda(void *data, int state)
{
	struct nouveau_i2c_port *port = data;
	port->func->drive_sda(port, state);
}

static int
nouveau_i2c_getscl(void *data)
{
	struct nouveau_i2c_port *port = data;
	return port->func->sense_scl(port);
}

static int
nouveau_i2c_getsda(void *data)
{
	struct nouveau_i2c_port *port = data;
	return port->func->sense_sda(port);
}

/******************************************************************************
 * base i2c "port" class implementation
 *****************************************************************************/

void
_nouveau_i2c_port_dtor(struct nouveau_object *object)
{
	struct nouveau_i2c_port *port = (void *)object;
	i2c_del_adapter(&port->adapter);
	nouveau_object_destroy(&port->base);
}

int
nouveau_i2c_port_create_(struct nouveau_object *parent,
			 struct nouveau_object *engine,
			 struct nouveau_oclass *oclass, u8 index,
			 const struct i2c_algorithm *algo,
			 const struct nouveau_i2c_func *func,
			 int size, void **pobject)
{
	struct nouveau_device *device = nv_device(parent);
	struct nouveau_i2c *i2c = (void *)engine;
	struct nouveau_i2c_port *port;
	int ret;

	ret = nouveau_object_create_(parent, engine, oclass, 0, size, pobject);
	port = *pobject;
	if (ret)
		return ret;

	snprintf(port->adapter.name, sizeof(port->adapter.name),
		 "nouveau-%s-%d", device->name, index);
	port->adapter.owner = THIS_MODULE;
	port->adapter.dev.parent = nv_device_base(device);
	port->index = index;
	port->func = func;

	if ( algo == &nouveau_i2c_bit_algo &&
	    !nouveau_boolopt(device->cfgopt, "NvI2C", CSTMSEL)) {
		struct i2c_algo_bit_data *bit;

		bit = kzalloc(sizeof(*bit), GFP_KERNEL);
		if (!bit)
			return -ENOMEM;

		bit->udelay = 10;
		bit->timeout = usecs_to_jiffies(2200);
		bit->data = port;
		bit->pre_xfer = nouveau_i2c_pre_xfer;
		bit->setsda = nouveau_i2c_setsda;
		bit->setscl = nouveau_i2c_setscl;
		bit->getsda = nouveau_i2c_getsda;
		bit->getscl = nouveau_i2c_getscl;

		port->adapter.algo_data = bit;
		ret = i2c_bit_add_bus(&port->adapter);
	} else {
		port->adapter.algo_data = port;
		port->adapter.algo = algo;
		ret = i2c_add_adapter(&port->adapter);
	}

	if (ret == 0)
		list_add_tail(&port->head, &i2c->ports);
	return ret;
}

/******************************************************************************
 * base i2c subdev class implementation
 *****************************************************************************/

static struct nouveau_i2c_port *
nouveau_i2c_find(struct nouveau_i2c *i2c, u8 index)
{
	struct nouveau_bios *bios = nouveau_bios(i2c);
	struct nouveau_i2c_port *port;

	if (index == NV_I2C_DEFAULT(0) ||
	    index == NV_I2C_DEFAULT(1)) {
		u8  ver, hdr, cnt, len;
		u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len);
		if (i2c && ver >= 0x30) {
			u8 auxidx = nv_ro08(bios, i2c + 4);
			if (index == NV_I2C_DEFAULT(0))
				index = (auxidx & 0x0f) >> 0;
			else
				index = (auxidx & 0xf0) >> 4;
		} else {
			index = 2;
		}
	}

	list_for_each_entry(port, &i2c->ports, head) {
		if (port->index == index)
			return port;
	}

	return NULL;
}

static struct nouveau_i2c_port *
nouveau_i2c_find_type(struct nouveau_i2c *i2c, u16 type)
{
	struct nouveau_i2c_port *port;

	list_for_each_entry(port, &i2c->ports, head) {
		if (nv_hclass(port) == type)
			return port;
	}

	return NULL;
}

static int
nouveau_i2c_identify(struct nouveau_i2c *i2c, int index, const char *what,
		     struct nouveau_i2c_board_info *info,
		     bool (*match)(struct nouveau_i2c_port *,
				   struct i2c_board_info *, void *), void *data)
{
	struct nouveau_i2c_port *port = nouveau_i2c_find(i2c, index);
	int i;

	if (!port) {
		nv_debug(i2c, "no bus when probing %s on %d\n", what, index);
		return -ENODEV;
	}

	nv_debug(i2c, "probing %ss on bus: %d\n", what, port->index);
	for (i = 0; info[i].dev.addr; i++) {
		u8 orig_udelay = 0;

		if ((port->adapter.algo == &i2c_bit_algo) &&
		    (info[i].udelay != 0)) {
			struct i2c_algo_bit_data *algo = port->adapter.algo_data;
			nv_debug(i2c, "using custom udelay %d instead of %d\n",
			         info[i].udelay, algo->udelay);
			orig_udelay = algo->udelay;
			algo->udelay = info[i].udelay;
		}

		if (nv_probe_i2c(port, info[i].dev.addr) &&
		    (!match || match(port, &info[i].dev, data))) {
			nv_info(i2c, "detected %s: %s\n", what,
				info[i].dev.type);
			return i;
		}

		if (orig_udelay) {
			struct i2c_algo_bit_data *algo = port->adapter.algo_data;
			algo->udelay = orig_udelay;
		}
	}

	nv_debug(i2c, "no devices found.\n");
	return -ENODEV;
}

int
_nouveau_i2c_fini(struct nouveau_object *object, bool suspend)
{
	struct nouveau_i2c *i2c = (void *)object;
	struct nouveau_i2c_port *port;
	int ret;

	list_for_each_entry(port, &i2c->ports, head) {
		ret = nv_ofuncs(port)->fini(nv_object(port), suspend);
		if (ret && suspend)
			goto fail;
	}

	return nouveau_subdev_fini(&i2c->base, suspend);
fail:
	list_for_each_entry_continue_reverse(port, &i2c->ports, head) {
		nv_ofuncs(port)->init(nv_object(port));
	}

	return ret;
}

int
_nouveau_i2c_init(struct nouveau_object *object)
{
	struct nouveau_i2c *i2c = (void *)object;
	struct nouveau_i2c_port *port;
	int ret;

	ret = nouveau_subdev_init(&i2c->base);
	if (ret == 0) {
		list_for_each_entry(port, &i2c->ports, head) {
			ret = nv_ofuncs(port)->init(nv_object(port));
			if (ret)
				goto fail;
		}
	}

	return ret;
fail:
	list_for_each_entry_continue_reverse(port, &i2c->ports, head) {
		nv_ofuncs(port)->fini(nv_object(port), false);
	}

	return ret;
}

void
_nouveau_i2c_dtor(struct nouveau_object *object)
{
	struct nouveau_i2c *i2c = (void *)object;
	struct nouveau_i2c_port *port, *temp;

	list_for_each_entry_safe(port, temp, &i2c->ports, head) {
		nouveau_object_ref(NULL, (struct nouveau_object **)&port);
	}

	nouveau_subdev_destroy(&i2c->base);
}

static struct nouveau_oclass *
nouveau_i2c_extdev_sclass[] = {
	nouveau_anx9805_sclass,
};

int
nouveau_i2c_create_(struct nouveau_object *parent,
		    struct nouveau_object *engine,
		    struct nouveau_oclass *oclass,
		    int length, void **pobject)
{
	const struct nouveau_i2c_impl *impl = (void *)oclass;
	struct nouveau_bios *bios = nouveau_bios(parent);
	struct nouveau_i2c *i2c;
	struct nouveau_object *object;
	struct dcb_i2c_entry info;
	int ret, i, j, index = -1;
	struct dcb_output outp;
	u8  ver, hdr;
	u32 data;

	ret = nouveau_subdev_create(parent, engine, oclass, 0,
				    "I2C", "i2c", &i2c);
	*pobject = nv_object(i2c);
	if (ret)
		return ret;

	i2c->find = nouveau_i2c_find;
	i2c->find_type = nouveau_i2c_find_type;
	i2c->identify = nouveau_i2c_identify;
	INIT_LIST_HEAD(&i2c->ports);

	while (!dcb_i2c_parse(bios, ++index, &info)) {
		if (info.type == DCB_I2C_UNUSED)
			continue;

		oclass = impl->sclass;
		do {
			ret = -EINVAL;
			if (oclass->handle == info.type) {
				ret = nouveau_object_ctor(*pobject, *pobject,
							  oclass, &info,
							  index, &object);
			}
		} while (ret && (++oclass)->handle);
	}

	/* in addition to the busses specified in the i2c table, there
	 * may be ddc/aux channels hiding behind external tmds/dp/etc
	 * transmitters.
	 */
	index = ((index + 0x0f) / 0x10) * 0x10;
	i = -1;
	while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &outp))) {
		if (!outp.location || !outp.extdev)
			continue;

		switch (outp.type) {
		case DCB_OUTPUT_TMDS:
			info.type = NV_I2C_TYPE_EXTDDC(outp.extdev);
			break;
		case DCB_OUTPUT_DP:
			info.type = NV_I2C_TYPE_EXTAUX(outp.extdev);
			break;
		default:
			continue;
		}

		ret = -ENODEV;
		j = -1;
		while (ret && ++j < ARRAY_SIZE(nouveau_i2c_extdev_sclass)) {
			parent = nv_object(i2c->find(i2c, outp.i2c_index));
			oclass = nouveau_i2c_extdev_sclass[j];
			do {
				if (oclass->handle != info.type)
					continue;
				ret = nouveau_object_ctor(parent, *pobject,
							  oclass, NULL,
							  index++, &object);
			} while (ret && (++oclass)->handle);
		}
	}

	return 0;
}

int
_nouveau_i2c_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
		  struct nouveau_oclass *oclass, void *data, u32 size,
		  struct nouveau_object **pobject)
{
	struct nouveau_i2c *i2c;
	int ret;

	ret = nouveau_i2c_create(parent, engine, oclass, &i2c);
	*pobject = nv_object(i2c);
	if (ret)
		return ret;

	return 0;
}
Commit	Line	Data
6ee73861	1	/*
7dcd060c	2	* Copyright 2013 Red Hat Inc.
6ee73861 BS	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	* Authors: Ben Skeggs
	23	*/
	24
7dcd060c	25	#include <core/option.h>
e0cd3608	26
5effecd4 BS	27	#include <subdev/bios.h>
	28	#include <subdev/bios/dcb.h>
	29	#include <subdev/bios/i2c.h>
7dcd060c	30	#include <subdev/vga.h>
6ee73861	31
c26fe843 BS	32	#include "priv.h"
c26fe843 BS	33
7dcd060c BS	34	/******************************************************************************
	35	* interface to linux i2c bit-banging algorithm
	36	*****************************************************************************/
	37
	38	#ifdef CONFIG_NOUVEAU_I2C_INTERNAL_DEFAULT
	39	#define CSTMSEL true
	40	#else
	41	#define CSTMSEL false
	42	#endif
	43
	44	static int
	45	nouveau_i2c_pre_xfer(struct i2c_adapter *adap)
4196faa8	46	{
7dcd060c BS	47	struct i2c_algo_bit_data *bit = adap->algo_data;
	48	struct nouveau_i2c_port *port = bit->data;
	49	if (port->func->acquire)
	50	port->func->acquire(port);
	51	return 0;
	52	}
4196faa8	53
7dcd060c BS	54	static void
	55	nouveau_i2c_setscl(void *data, int state)
	56	{
	57	struct nouveau_i2c_port *port = data;
	58	port->func->drive_scl(port, state);
	59	}
4196faa8	60
7dcd060c BS	61	static void
	62	nouveau_i2c_setsda(void *data, int state)
	63	{
	64	struct nouveau_i2c_port *port = data;
	65	port->func->drive_sda(port, state);
4196faa8 BS	66	}
4196faa8 BS	67
7dcd060c BS	68	static int
7dcd060c BS	69	nouveau_i2c_getscl(void *data)
4196faa8	70	{
7dcd060c BS	71	struct nouveau_i2c_port *port = data;
	72	return port->func->sense_scl(port);
	73	}
4196faa8	74
7dcd060c BS	75	static int
	76	nouveau_i2c_getsda(void *data)
	77	{
	78	struct nouveau_i2c_port *port = data;
	79	return port->func->sense_sda(port);
	80	}
4196faa8	81
7dcd060c BS	82	/******************************************************************************
	83	* base i2c "port" class implementation
	84	*****************************************************************************/
	85
	86	void
	87	_nouveau_i2c_port_dtor(struct nouveau_object *object)
	88	{
	89	struct nouveau_i2c_port port = (void )object;
	90	i2c_del_adapter(&port->adapter);
	91	nouveau_object_destroy(&port->base);
4196faa8 BS	92	}
4196faa8 BS	93
7dcd060c BS	94	int
	95	nouveau_i2c_port_create_(struct nouveau_object *parent,
	96	struct nouveau_object *engine,
	97	struct nouveau_oclass *oclass, u8 index,
	98	const struct i2c_algorithm *algo,
c865534f	99	const struct nouveau_i2c_func *func,
7dcd060c	100	int size, void **pobject)
4196faa8	101	{
7dcd060c BS	102	struct nouveau_device *device = nv_device(parent);
	103	struct nouveau_i2c i2c = (void )engine;
	104	struct nouveau_i2c_port *port;
	105	int ret;
	106
	107	ret = nouveau_object_create_(parent, engine, oclass, 0, size, pobject);
	108	port = *pobject;
	109	if (ret)
	110	return ret;
	111
	112	snprintf(port->adapter.name, sizeof(port->adapter.name),
	113	"nouveau-%s-%d", device->name, index);
	114	port->adapter.owner = THIS_MODULE;
420b9469	115	port->adapter.dev.parent = nv_device_base(device);
7dcd060c	116	port->index = index;
c865534f	117	port->func = func;
7dcd060c BS	118
	119	if ( algo == &nouveau_i2c_bit_algo &&
	120	!nouveau_boolopt(device->cfgopt, "NvI2C", CSTMSEL)) {
	121	struct i2c_algo_bit_data *bit;
	122
	123	bit = kzalloc(sizeof(*bit), GFP_KERNEL);
	124	if (!bit)
	125	return -ENOMEM;
	126
	127	bit->udelay = 10;
	128	bit->timeout = usecs_to_jiffies(2200);
	129	bit->data = port;
	130	bit->pre_xfer = nouveau_i2c_pre_xfer;
	131	bit->setsda = nouveau_i2c_setsda;
	132	bit->setscl = nouveau_i2c_setscl;
	133	bit->getsda = nouveau_i2c_getsda;
	134	bit->getscl = nouveau_i2c_getscl;
	135
	136	port->adapter.algo_data = bit;
	137	ret = i2c_bit_add_bus(&port->adapter);
	138	} else {
	139	port->adapter.algo_data = port;
	140	port->adapter.algo = algo;
	141	ret = i2c_add_adapter(&port->adapter);
	142	}
	143
d395f1e4	144	if (ret == 0)
7dcd060c	145	list_add_tail(&port->head, &i2c->ports);
7dcd060c	146	return ret;
4196faa8 BS	147	}
4196faa8 BS	148
7dcd060c BS	149	/******************************************************************************
	150	* base i2c subdev class implementation
	151	*****************************************************************************/
	152
4196faa8 BS	153	static struct nouveau_i2c_port *
	154	nouveau_i2c_find(struct nouveau_i2c *i2c, u8 index)
	155	{
	156	struct nouveau_bios *bios = nouveau_bios(i2c);
	157	struct nouveau_i2c_port *port;
	158
	159	if (index == NV_I2C_DEFAULT(0) \|\|
	160	index == NV_I2C_DEFAULT(1)) {
	161	u8 ver, hdr, cnt, len;
	162	u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len);
	163	if (i2c && ver >= 0x30) {
	164	u8 auxidx = nv_ro08(bios, i2c + 4);
	165	if (index == NV_I2C_DEFAULT(0))
	166	index = (auxidx & 0x0f) >> 0;
	167	else
	168	index = (auxidx & 0xf0) >> 4;
	169	} else {
	170	index = 2;
	171	}
	172	}
	173
	174	list_for_each_entry(port, &i2c->ports, head) {
	175	if (port->index == index)
df3ef6a1	176	return port;
4196faa8 BS	177	}
4196faa8 BS	178
df3ef6a1	179	return NULL;
4196faa8 BS	180	}
4196faa8 BS	181
548ddb6d BS	182	static struct nouveau_i2c_port *
	183	nouveau_i2c_find_type(struct nouveau_i2c *i2c, u16 type)
	184	{
	185	struct nouveau_i2c_port *port;
	186
	187	list_for_each_entry(port, &i2c->ports, head) {
7dcd060c	188	if (nv_hclass(port) == type)
548ddb6d BS	189	return port;
	190	}
	191
	192	return NULL;
	193	}
	194
4196faa8 BS	195	static int
4196faa8 BS	196	nouveau_i2c_identify(struct nouveau_i2c i2c, int index, const char what,
9e2b734f	197	struct nouveau_i2c_board_info *info,
4196faa8	198	bool (match)(struct nouveau_i2c_port ,
fdd239ac	199	struct i2c_board_info , void ), void *data)
6ee73861	200	{
4196faa8 BS	201	struct nouveau_i2c_port *port = nouveau_i2c_find(i2c, index);
	202	int i;
	203
	204	if (!port) {
	205	nv_debug(i2c, "no bus when probing %s on %d\n", what, index);
	206	return -ENODEV;
	207	}
	208
	209	nv_debug(i2c, "probing %ss on bus: %d\n", what, port->index);
9e2b734f MP	210	for (i = 0; info[i].dev.addr; i++) {
	211	u8 orig_udelay = 0;
	212
	213	if ((port->adapter.algo == &i2c_bit_algo) &&
	214	(info[i].udelay != 0)) {
	215	struct i2c_algo_bit_data *algo = port->adapter.algo_data;
	216	nv_debug(i2c, "using custom udelay %d instead of %d\n",
	217	info[i].udelay, algo->udelay);
	218	orig_udelay = algo->udelay;
	219	algo->udelay = info[i].udelay;
	220	}
	221
	222	if (nv_probe_i2c(port, info[i].dev.addr) &&
fdd239ac	223	(!match \|\| match(port, &info[i].dev, data))) {
9e2b734f MP	224	nv_info(i2c, "detected %s: %s\n", what,
9e2b734f MP	225	info[i].dev.type);
4196faa8 BS	226	return i;
4196faa8 BS	227	}
9e2b734f MP	228
	229	if (orig_udelay) {
	230	struct i2c_algo_bit_data *algo = port->adapter.algo_data;
	231	algo->udelay = orig_udelay;
	232	}
4196faa8 BS	233	}
	234
	235	nv_debug(i2c, "no devices found.\n");
	236	return -ENODEV;
	237	}
	238
7dcd060c BS	239	int
7dcd060c BS	240	_nouveau_i2c_fini(struct nouveau_object *object, bool suspend)
4196faa8	241	{
7dcd060c BS	242	struct nouveau_i2c i2c = (void )object;
	243	struct nouveau_i2c_port *port;
	244	int ret;
4196faa8	245
7dcd060c BS	246	list_for_each_entry(port, &i2c->ports, head) {
	247	ret = nv_ofuncs(port)->fini(nv_object(port), suspend);
	248	if (ret && suspend)
	249	goto fail;
2bdb06e3	250	}
4196faa8	251
7dcd060c BS	252	return nouveau_subdev_fini(&i2c->base, suspend);
	253	fail:
	254	list_for_each_entry_continue_reverse(port, &i2c->ports, head) {
	255	nv_ofuncs(port)->init(nv_object(port));
2bdb06e3	256	}
7dcd060c BS	257
7dcd060c BS	258	return ret;
6ee73861 BS	259	}
6ee73861 BS	260
4196faa8	261	int
7dcd060c	262	_nouveau_i2c_init(struct nouveau_object *object)
eeb3ca12	263	{
7dcd060c BS	264	struct nouveau_i2c i2c = (void )object;
	265	struct nouveau_i2c_port *port;
	266	int ret;
	267
	268	ret = nouveau_subdev_init(&i2c->base);
	269	if (ret == 0) {
	270	list_for_each_entry(port, &i2c->ports, head) {
	271	ret = nv_ofuncs(port)->init(nv_object(port));
	272	if (ret)
	273	goto fail;
	274	}
2bdb06e3	275	}
4196faa8	276
7dcd060c BS	277	return ret;
	278	fail:
	279	list_for_each_entry_continue_reverse(port, &i2c->ports, head) {
	280	nv_ofuncs(port)->fini(nv_object(port), false);
2bdb06e3	281	}
4196faa8	282
7dcd060c	283	return ret;
eeb3ca12	284	}
6ee73861	285
7dcd060c BS	286	void
7dcd060c BS	287	_nouveau_i2c_dtor(struct nouveau_object *object)
df3ef6a1	288	{
7dcd060c BS	289	struct nouveau_i2c i2c = (void )object;
	290	struct nouveau_i2c_port port, temp;
	291
	292	list_for_each_entry_safe(port, temp, &i2c->ports, head) {
	293	nouveau_object_ref(NULL, (struct nouveau_object **)&port);
df3ef6a1 BS	294	}
df3ef6a1 BS	295
7dcd060c	296	nouveau_subdev_destroy(&i2c->base);
df3ef6a1 BS	297	}
df3ef6a1 BS	298
5effecd4 BS	299	static struct nouveau_oclass *
	300	nouveau_i2c_extdev_sclass[] = {
	301	nouveau_anx9805_sclass,
	302	};
	303
7dcd060c BS	304	int
	305	nouveau_i2c_create_(struct nouveau_object *parent,
	306	struct nouveau_object *engine,
	307	struct nouveau_oclass *oclass,
7dcd060c	308	int length, void **pobject)
6ee73861	309	{
c26fe843	310	const struct nouveau_i2c_impl impl = (void )oclass;
4196faa8	311	struct nouveau_bios *bios = nouveau_bios(parent);
4196faa8	312	struct nouveau_i2c *i2c;
7dcd060c	313	struct nouveau_object *object;
4196faa8	314	struct dcb_i2c_entry info;
5effecd4 BS	315	int ret, i, j, index = -1;
	316	struct dcb_output outp;
	317	u8 ver, hdr;
	318	u32 data;
4196faa8 BS	319
	320	ret = nouveau_subdev_create(parent, engine, oclass, 0,
	321	"I2C", "i2c", &i2c);
	322	*pobject = nv_object(i2c);
	323	if (ret)
	324	return ret;
	325
	326	i2c->find = nouveau_i2c_find;
548ddb6d	327	i2c->find_type = nouveau_i2c_find_type;
4196faa8 BS	328	i2c->identify = nouveau_i2c_identify;
	329	INIT_LIST_HEAD(&i2c->ports);
	330
7dcd060c	331	while (!dcb_i2c_parse(bios, ++index, &info)) {
4196faa8 BS	332	if (info.type == DCB_I2C_UNUSED)
4196faa8 BS	333	continue;
6ee73861	334
c26fe843	335	oclass = impl->sclass;
7dcd060c BS	336	do {
	337	ret = -EINVAL;
	338	if (oclass->handle == info.type) {
	339	ret = nouveau_object_ctor(pobject, pobject,
	340	oclass, &info,
	341	index, &object);
4196faa8	342	}
7dcd060c	343	} while (ret && (++oclass)->handle);
6ee73861 BS	344	}
6ee73861 BS	345
5effecd4 BS	346	/* in addition to the busses specified in the i2c table, there
	347	* may be ddc/aux channels hiding behind external tmds/dp/etc
	348	* transmitters.
	349	*/
	350	index = ((index + 0x0f) / 0x10) * 0x10;
	351	i = -1;
	352	while ((data = dcb_outp_parse(bios, ++i, &ver, &hdr, &outp))) {
	353	if (!outp.location \|\| !outp.extdev)
	354	continue;
	355
	356	switch (outp.type) {
	357	case DCB_OUTPUT_TMDS:
	358	info.type = NV_I2C_TYPE_EXTDDC(outp.extdev);
	359	break;
	360	case DCB_OUTPUT_DP:
	361	info.type = NV_I2C_TYPE_EXTAUX(outp.extdev);
	362	break;
	363	default:
	364	continue;
	365	}
	366
	367	ret = -ENODEV;
	368	j = -1;
	369	while (ret && ++j < ARRAY_SIZE(nouveau_i2c_extdev_sclass)) {
	370	parent = nv_object(i2c->find(i2c, outp.i2c_index));
	371	oclass = nouveau_i2c_extdev_sclass[j];
	372	do {
	373	if (oclass->handle != info.type)
	374	continue;
	375	ret = nouveau_object_ctor(parent, *pobject,
	376	oclass, NULL,
	377	index++, &object);
	378	} while (ret && (++oclass)->handle);
	379	}
	380	}
	381
6ee73861 BS	382	return 0;
6ee73861 BS	383	}
c26fe843 BS	384
	385	int
	386	_nouveau_i2c_ctor(struct nouveau_object parent, struct nouveau_object engine,
	387	struct nouveau_oclass oclass, void data, u32 size,
	388	struct nouveau_object **pobject)
	389	{
	390	struct nouveau_i2c *i2c;
	391	int ret;
	392
	393	ret = nouveau_i2c_create(parent, engine, oclass, &i2c);
	394	*pobject = nv_object(i2c);
	395	if (ret)
	396	return ret;
	397
	398	return 0;
	399	}