[deliverable/linux.git] / drivers / gpu / drm / nouveau / nvkm / subdev / iccsense / base.c

/*
 * Copyright 2015 Martin Peres
 *
 * 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: Martin Peres
 */
#include "priv.h"

#include <subdev/bios.h>
#include <subdev/bios/extdev.h>
#include <subdev/bios/iccsense.h>
#include <subdev/i2c.h>

static bool
nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
			      enum nvbios_extdev_type type, u8 rail)
{
	switch (type) {
	case NVBIOS_EXTDEV_INA209:
	case NVBIOS_EXTDEV_INA219:
		return rail == 0 && nv_rd16i2cr(i2c, addr, 0x0) >= 0;
	case NVBIOS_EXTDEV_INA3221:
		return rail <= 3 &&
		       nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
		       nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
	default:
		return false;
	}
}

static int
nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
			u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
			u16 lsb)
{
	int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
	int vbus = nv_rd16i2cr(i2c, addr, bus_reg);

	if (vshunt < 0 || vbus < 0)
		return -EINVAL;

	vshunt >>= shunt_shift;
	vbus >>= bus_shift;

	return vbus * vshunt * lsb / shunt;
}

static int
nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
                          struct nvkm_iccsense_rail *rail,
			  u8 shunt_reg, u8 bus_reg)
{
	return nvkm_iccsense_poll_lane(rail->i2c, rail->addr, shunt_reg, 0,
				       bus_reg, 3, rail->mohm, 10 * 4);
}

static int
nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
			  struct nvkm_iccsense_rail *rail)
{
	return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
}

static int
nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
			  struct nvkm_iccsense_rail *rail)
{
	return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
}

static int
nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
			   struct nvkm_iccsense_rail *rail)
{
	return nvkm_iccsense_poll_lane(rail->i2c, rail->addr,
				       1 + (rail->rail * 2), 3,
				       2 + (rail->rail * 2), 3, rail->mohm,
				       40 * 8);
}

int
nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
{
	int result = 0;
	struct nvkm_iccsense_rail *rail;

	if (!iccsense)
		return -EINVAL;

	list_for_each_entry(rail, &iccsense->rails, head) {
		int res;
		if (!rail->read)
			return -ENODEV;

		res = rail->read(iccsense, rail);
		if (res < 0)
			return res;
		result += res;
	}
	return result;
}

static void *
nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
{
	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
	struct nvkm_iccsense_rail *rail, *tmp;

	list_for_each_entry_safe(rail, tmp, &iccsense->rails, head) {
		list_del(&rail->head);
		kfree(rail);
	}

	return iccsense;
}

static int
nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
{
	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
	struct nvkm_bios *bios = subdev->device->bios;
	struct nvkm_i2c *i2c = subdev->device->i2c;
	struct nvbios_iccsense stbl;
	int i;

	if (!i2c || !bios || nvbios_iccsense_parse(bios, &stbl)
	    || !stbl.nr_entry)
		return 0;

	iccsense->data_valid = true;
	for (i = 0; i < stbl.nr_entry; ++i) {
		struct pwr_rail_t *r = &stbl.rail[i];
		struct nvbios_extdev_func extdev;
		struct nvkm_iccsense_rail *rail;
		struct nvkm_i2c_bus *i2c_bus;
		u8 addr;

		if (!r->mode || r->resistor_mohm == 0)
			continue;

		if (nvbios_extdev_parse(bios, r->extdev_id, &extdev))
			continue;

		if (extdev.type == 0xff)
			continue;

		if (extdev.bus)
			i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
		else
			i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
		if (!i2c_bus)
			continue;

		addr = extdev.addr >> 1;
		if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
						   extdev.type, r->rail)) {
			iccsense->data_valid = false;
			nvkm_warn(subdev, "found unknown or invalid rail entry"
				  " type 0x%x rail %i, power reading might be"
				  " invalid\n", extdev.type, r->rail);
			continue;
		}

		rail = kmalloc(sizeof(*rail), GFP_KERNEL);
		if (!rail)
			return -ENOMEM;

		switch (extdev.type) {
		case NVBIOS_EXTDEV_INA209:
			rail->read = nvkm_iccsense_ina209_read;
			break;
		case NVBIOS_EXTDEV_INA219:
			rail->read = nvkm_iccsense_ina219_read;
			break;
		case NVBIOS_EXTDEV_INA3221:
			rail->read = nvkm_iccsense_ina3221_read;
			break;
		}

		rail->addr = addr;
		rail->rail = r->rail;
		rail->mohm = r->resistor_mohm;
		rail->i2c = &i2c_bus->i2c;
		list_add_tail(&rail->head, &iccsense->rails);
	}
	return 0;
}

struct nvkm_subdev_func iccsense_func = {
	.oneinit = nvkm_iccsense_oneinit,
	.dtor = nvkm_iccsense_dtor,
};

void
nvkm_iccsense_ctor(struct nvkm_device *device, int index,
		   struct nvkm_iccsense *iccsense)
{
	nvkm_subdev_ctor(&iccsense_func, device, index, 0, &iccsense->subdev);
}

int
nvkm_iccsense_new_(struct nvkm_device *device, int index,
		   struct nvkm_iccsense **iccsense)
{
	if (!(*iccsense = kzalloc(sizeof(**iccsense), GFP_KERNEL)))
		return -ENOMEM;
	INIT_LIST_HEAD(&(*iccsense)->rails);
	nvkm_iccsense_ctor(device, index, *iccsense);
	return 0;
}
Commit	Line	Data
dc06e366 MP	1	/*
	2	* Copyright 2015 Martin Peres
	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: Martin Peres
	23	*/
	24	#include "priv.h"
	25
b71c0892 KH	26	#include <subdev/bios.h>
	27	#include <subdev/bios/extdev.h>
	28	#include <subdev/bios/iccsense.h>
	29	#include <subdev/i2c.h>
	30
	31	static bool
	32	nvkm_iccsense_validate_device(struct i2c_adapter *i2c, u8 addr,
	33	enum nvbios_extdev_type type, u8 rail)
	34	{
	35	switch (type) {
	36	case NVBIOS_EXTDEV_INA209:
	37	case NVBIOS_EXTDEV_INA219:
	38	return rail == 0 && nv_rd16i2cr(i2c, addr, 0x0) >= 0;
	39	case NVBIOS_EXTDEV_INA3221:
	40	return rail <= 3 &&
	41	nv_rd16i2cr(i2c, addr, 0xff) == 0x3220 &&
	42	nv_rd16i2cr(i2c, addr, 0xfe) == 0x5449;
	43	default:
	44	return false;
	45	}
	46	}
	47
	48	static int
	49	nvkm_iccsense_poll_lane(struct i2c_adapter *i2c, u8 addr, u8 shunt_reg,
	50	u8 shunt_shift, u8 bus_reg, u8 bus_shift, u8 shunt,
	51	u16 lsb)
	52	{
	53	int vshunt = nv_rd16i2cr(i2c, addr, shunt_reg);
	54	int vbus = nv_rd16i2cr(i2c, addr, bus_reg);
	55
	56	if (vshunt < 0 \|\| vbus < 0)
	57	return -EINVAL;
	58
	59	vshunt >>= shunt_shift;
	60	vbus >>= bus_shift;
	61
	62	return vbus * vshunt * lsb / shunt;
	63	}
	64
	65	static int
	66	nvkm_iccsense_ina2x9_read(struct nvkm_iccsense *iccsense,
	67	struct nvkm_iccsense_rail *rail,
	68	u8 shunt_reg, u8 bus_reg)
	69	{
	70	return nvkm_iccsense_poll_lane(rail->i2c, rail->addr, shunt_reg, 0,
	71	bus_reg, 3, rail->mohm, 10 * 4);
	72	}
	73
	74	static int
	75	nvkm_iccsense_ina209_read(struct nvkm_iccsense *iccsense,
	76	struct nvkm_iccsense_rail *rail)
	77	{
	78	return nvkm_iccsense_ina2x9_read(iccsense, rail, 3, 4);
	79	}
	80
	81	static int
	82	nvkm_iccsense_ina219_read(struct nvkm_iccsense *iccsense,
	83	struct nvkm_iccsense_rail *rail)
	84	{
	85	return nvkm_iccsense_ina2x9_read(iccsense, rail, 1, 2);
	86	}
	87
	88	static int
	89	nvkm_iccsense_ina3221_read(struct nvkm_iccsense *iccsense,
90	struct nvkm_iccsense_rail *rail)
91	{
92	return nvkm_iccsense_poll_lane(rail->i2c, rail->addr,
93	1 + (rail->rail * 2), 3,
94	2 + (rail->rail * 2), 3, rail->mohm,
95	40 * 8);
96	}
97
98	int
d03e0f27	99	nvkm_iccsense_read_all(struct nvkm_iccsense *iccsense)
b71c0892	100	{
92224e75 KH	101	int result = 0;
92224e75 KH	102	struct nvkm_iccsense_rail *rail;
b71c0892	103
d03e0f27	104	if (!iccsense)
b71c0892 KH	105	return -EINVAL;
b71c0892 KH	106
92224e75	107	list_for_each_entry(rail, &iccsense->rails, head) {
d03e0f27	108	int res;
d03e0f27 KH	109	if (!rail->read)
	110	return -ENODEV;
	111
	112	res = rail->read(iccsense, rail);
92224e75	113	if (res < 0)
b71c0892	114	return res;
92224e75	115	result += res;
b71c0892 KH	116	}
	117	return result;
	118	}
	119
	120	static void *
	121	nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
	122	{
	123	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
92224e75	124	struct nvkm_iccsense_rail rail, tmp;
b71c0892	125
92224e75 KH	126	list_for_each_entry_safe(rail, tmp, &iccsense->rails, head) {
	127	list_del(&rail->head);
	128	kfree(rail);
	129	}
b71c0892 KH	130
	131	return iccsense;
	132	}
	133
	134	static int
	135	nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
	136	{
	137	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
	138	struct nvkm_bios *bios = subdev->device->bios;
	139	struct nvkm_i2c *i2c = subdev->device->i2c;
	140	struct nvbios_iccsense stbl;
	141	int i;
	142
	143	if (!i2c \|\| !bios \|\| nvbios_iccsense_parse(bios, &stbl)
	144	\|\| !stbl.nr_entry)
	145	return 0;
	146
b71c0892 KH	147	iccsense->data_valid = true;
	148	for (i = 0; i < stbl.nr_entry; ++i) {
	149	struct pwr_rail_t *r = &stbl.rail[i];
	150	struct nvbios_extdev_func extdev;
	151	struct nvkm_iccsense_rail *rail;
	152	struct nvkm_i2c_bus *i2c_bus;
	153	u8 addr;
	154
	155	if (!r->mode \|\| r->resistor_mohm == 0)
	156	continue;
	157
	158	if (nvbios_extdev_parse(bios, r->extdev_id, &extdev))
	159	continue;
	160
	161	if (extdev.type == 0xff)
	162	continue;
	163
	164	if (extdev.bus)
	165	i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
	166	else
	167	i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
	168	if (!i2c_bus)
	169	continue;
	170
	171	addr = extdev.addr >> 1;
	172	if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
	173	extdev.type, r->rail)) {
	174	iccsense->data_valid = false;
	175	nvkm_warn(subdev, "found unknown or invalid rail entry"
	176	" type 0x%x rail %i, power reading might be"
	177	" invalid\n", extdev.type, r->rail);
	178	continue;
	179	}
	180
92224e75 KH	181	rail = kmalloc(sizeof(*rail), GFP_KERNEL);
	182	if (!rail)
	183	return -ENOMEM;
	184
b71c0892 KH	185	switch (extdev.type) {
	186	case NVBIOS_EXTDEV_INA209:
	187	rail->read = nvkm_iccsense_ina209_read;
	188	break;
	189	case NVBIOS_EXTDEV_INA219:
	190	rail->read = nvkm_iccsense_ina219_read;
	191	break;
	192	case NVBIOS_EXTDEV_INA3221:
	193	rail->read = nvkm_iccsense_ina3221_read;
	194	break;
	195	}
	196
	197	rail->addr = addr;
	198	rail->rail = r->rail;
	199	rail->mohm = r->resistor_mohm;
	200	rail->i2c = &i2c_bus->i2c;
92224e75	201	list_add_tail(&rail->head, &iccsense->rails);
b71c0892 KH	202	}
	203	return 0;
	204	}
	205
	206	struct nvkm_subdev_func iccsense_func = {
	207	.oneinit = nvkm_iccsense_oneinit,
	208	.dtor = nvkm_iccsense_dtor,
	209	};
dc06e366 MP	210
	211	void
	212	nvkm_iccsense_ctor(struct nvkm_device *device, int index,
	213	struct nvkm_iccsense *iccsense)
	214	{
	215	nvkm_subdev_ctor(&iccsense_func, device, index, 0, &iccsense->subdev);
	216	}
	217
	218	int
	219	nvkm_iccsense_new_(struct nvkm_device *device, int index,
	220	struct nvkm_iccsense **iccsense)
	221	{
	222	if (!(iccsense = kzalloc(sizeof(*iccsense), GFP_KERNEL)))
	223	return -ENOMEM;
92224e75	224	INIT_LIST_HEAD(&(*iccsense)->rails);
dc06e366 MP	225	nvkm_iccsense_ctor(device, index, *iccsense);
	226	return 0;
	227	}