[deliverable/linux.git] / drivers / gpu / drm / nouveau / core / subdev / i2c / nv4e.c

/*
 * Copyright 2012 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 <subdev/vga.h>

#include "priv.h"

struct nv4e_i2c_priv {
	struct nouveau_i2c base;
};

struct nv4e_i2c_port {
	struct nouveau_i2c_port base;
	u32 addr;
};

static void
nv4e_i2c_drive_scl(struct nouveau_i2c_port *base, int state)
{
	struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine;
	struct nv4e_i2c_port *port = (void *)base;
	nv_mask(priv, port->addr, 0x2f, state ? 0x21 : 0x01);
}

static void
nv4e_i2c_drive_sda(struct nouveau_i2c_port *base, int state)
{
	struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine;
	struct nv4e_i2c_port *port = (void *)base;
	nv_mask(priv, port->addr, 0x1f, state ? 0x11 : 0x01);
}

static int
nv4e_i2c_sense_scl(struct nouveau_i2c_port *base)
{
	struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine;
	struct nv4e_i2c_port *port = (void *)base;
	return !!(nv_rd32(priv, port->addr) & 0x00040000);
}

static int
nv4e_i2c_sense_sda(struct nouveau_i2c_port *base)
{
	struct nv4e_i2c_priv *priv = (void *)nv_object(base)->engine;
	struct nv4e_i2c_port *port = (void *)base;
	return !!(nv_rd32(priv, port->addr) & 0x00080000);
}

static const struct nouveau_i2c_func
nv4e_i2c_func = {
	.drive_scl = nv4e_i2c_drive_scl,
	.drive_sda = nv4e_i2c_drive_sda,
	.sense_scl = nv4e_i2c_sense_scl,
	.sense_sda = nv4e_i2c_sense_sda,
};

static int
nv4e_i2c_port_ctor(struct nouveau_object *parent, struct nouveau_object *engine,
		   struct nouveau_oclass *oclass, void *data, u32 index,
		   struct nouveau_object **pobject)
{
	struct dcb_i2c_entry *info = data;
	struct nv4e_i2c_port *port;
	int ret;

	ret = nouveau_i2c_port_create(parent, engine, oclass, index,
				      &nouveau_i2c_bit_algo, &nv4e_i2c_func,
				      &port);
	*pobject = nv_object(port);
	if (ret)
		return ret;

	port->addr = 0x600800 + info->drive;
	return 0;
}

static struct nouveau_oclass
nv4e_i2c_sclass[] = {
	{ .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NV4E_BIT),
	  .ofuncs = &(struct nouveau_ofuncs) {
		  .ctor = nv4e_i2c_port_ctor,
		  .dtor = _nouveau_i2c_port_dtor,
		  .init = _nouveau_i2c_port_init,
		  .fini = _nouveau_i2c_port_fini,
	  },
	},
	{}
};

struct nouveau_oclass *
nv4e_i2c_oclass = &(struct nouveau_i2c_impl) {
	.base.handle = NV_SUBDEV(I2C, 0x4e),
	.base.ofuncs = &(struct nouveau_ofuncs) {
		.ctor = _nouveau_i2c_ctor,
		.dtor = _nouveau_i2c_dtor,
		.init = _nouveau_i2c_init,
		.fini = _nouveau_i2c_fini,
	},
	.sclass = nv4e_i2c_sclass,
}.base;
Commit	Line	Data
7dcd060c BS	1	/*
	2	* Copyright 2012 Red Hat Inc.
	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 BS	25	#include <subdev/vga.h>
7dcd060c BS	26
c26fe843 BS	27	#include "priv.h"
c26fe843 BS	28
7dcd060c BS	29	struct nv4e_i2c_priv {
	30	struct nouveau_i2c base;
	31	};
	32
	33	struct nv4e_i2c_port {
	34	struct nouveau_i2c_port base;
	35	u32 addr;
	36	};
	37
	38	static void
	39	nv4e_i2c_drive_scl(struct nouveau_i2c_port *base, int state)
	40	{
	41	struct nv4e_i2c_priv priv = (void )nv_object(base)->engine;
	42	struct nv4e_i2c_port port = (void )base;
	43	nv_mask(priv, port->addr, 0x2f, state ? 0x21 : 0x01);
	44	}
	45
	46	static void
	47	nv4e_i2c_drive_sda(struct nouveau_i2c_port *base, int state)
	48	{
	49	struct nv4e_i2c_priv priv = (void )nv_object(base)->engine;
	50	struct nv4e_i2c_port port = (void )base;
	51	nv_mask(priv, port->addr, 0x1f, state ? 0x11 : 0x01);
	52	}
	53
	54	static int
	55	nv4e_i2c_sense_scl(struct nouveau_i2c_port *base)
	56	{
	57	struct nv4e_i2c_priv priv = (void )nv_object(base)->engine;
	58	struct nv4e_i2c_port port = (void )base;
	59	return !!(nv_rd32(priv, port->addr) & 0x00040000);
	60	}
	61
	62	static int
	63	nv4e_i2c_sense_sda(struct nouveau_i2c_port *base)
	64	{
	65	struct nv4e_i2c_priv priv = (void )nv_object(base)->engine;
	66	struct nv4e_i2c_port port = (void )base;
	67	return !!(nv_rd32(priv, port->addr) & 0x00080000);
	68	}
	69
	70	static const struct nouveau_i2c_func
	71	nv4e_i2c_func = {
	72	.drive_scl = nv4e_i2c_drive_scl,
	73	.drive_sda = nv4e_i2c_drive_sda,
	74	.sense_scl = nv4e_i2c_sense_scl,
	75	.sense_sda = nv4e_i2c_sense_sda,
	76	};
	77
	78	static int
	79	nv4e_i2c_port_ctor(struct nouveau_object parent, struct nouveau_object engine,
	80	struct nouveau_oclass oclass, void data, u32 index,
	81	struct nouveau_object **pobject)
	82	{
	83	struct dcb_i2c_entry *info = data;
	84	struct nv4e_i2c_port *port;
	85	int ret;
	86
	87	ret = nouveau_i2c_port_create(parent, engine, oclass, index,
c865534f IM	88	&nouveau_i2c_bit_algo, &nv4e_i2c_func,
c865534f IM	89	&port);
7dcd060c BS	90	*pobject = nv_object(port);
	91	if (ret)
	92	return ret;
	93
7dcd060c BS	94	port->addr = 0x600800 + info->drive;
	95	return 0;
	96	}
	97
	98	static struct nouveau_oclass
	99	nv4e_i2c_sclass[] = {
	100	{ .handle = NV_I2C_TYPE_DCBI2C(DCB_I2C_NV4E_BIT),
	101	.ofuncs = &(struct nouveau_ofuncs) {
	102	.ctor = nv4e_i2c_port_ctor,
	103	.dtor = _nouveau_i2c_port_dtor,
	104	.init = _nouveau_i2c_port_init,
	105	.fini = _nouveau_i2c_port_fini,
	106	},
	107	},
	108	{}
	109	};
	110
c26fe843 BS	111	struct nouveau_oclass *
	112	nv4e_i2c_oclass = &(struct nouveau_i2c_impl) {
	113	.base.handle = NV_SUBDEV(I2C, 0x4e),
	114	.base.ofuncs = &(struct nouveau_ofuncs) {
	115	.ctor = _nouveau_i2c_ctor,
7dcd060c BS	116	.dtor = _nouveau_i2c_dtor,
	117	.init = _nouveau_i2c_init,
	118	.fini = _nouveau_i2c_fini,
	119	},
c26fe843 BS	120	.sclass = nv4e_i2c_sclass,
c26fe843 BS	121	}.base;