[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, i;

	if (!iccsense)
		return -EINVAL;

	if (iccsense->rail_count == 0)
		return -ENODEV;

	for (i = 0; i < iccsense->rail_count; ++i) {
		int res;
		struct nvkm_iccsense_rail *rail = &iccsense->rails[i];
		if (!rail->read)
			return -ENODEV;

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

static void *
nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
{
	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);

	if (iccsense->rails)
		kfree(iccsense->rails);

	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->rails = kmalloc(sizeof(*iccsense->rails) * stbl.nr_entry,
	                          GFP_KERNEL);
	if (!iccsense->rails)
		return -ENOMEM;

	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 = &iccsense->rails[iccsense->rail_count];
		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;
		++iccsense->rail_count;
	}
	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;
	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	{
d03e0f27	101	int result = 0, i;
b71c0892	102
d03e0f27	103	if (!iccsense)
b71c0892 KH	104	return -EINVAL;
b71c0892 KH	105
d03e0f27	106	if (iccsense->rail_count == 0)
b71c0892 KH	107	return -ENODEV;
b71c0892 KH	108
b71c0892	109	for (i = 0; i < iccsense->rail_count; ++i) {
d03e0f27 KH	110	int res;
	111	struct nvkm_iccsense_rail *rail = &iccsense->rails[i];
	112	if (!rail->read)
	113	return -ENODEV;
	114
	115	res = rail->read(iccsense, rail);
b71c0892 KH	116	if (res >= 0)
	117	result += res;
	118	else
	119	return res;
	120	}
	121	return result;
	122	}
	123
	124	static void *
	125	nvkm_iccsense_dtor(struct nvkm_subdev *subdev)
	126	{
	127	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
	128
	129	if (iccsense->rails)
	130	kfree(iccsense->rails);
	131
	132	return iccsense;
	133	}
	134
	135	static int
	136	nvkm_iccsense_oneinit(struct nvkm_subdev *subdev)
	137	{
	138	struct nvkm_iccsense *iccsense = nvkm_iccsense(subdev);
	139	struct nvkm_bios *bios = subdev->device->bios;
	140	struct nvkm_i2c *i2c = subdev->device->i2c;
	141	struct nvbios_iccsense stbl;
	142	int i;
	143
	144	if (!i2c \|\| !bios \|\| nvbios_iccsense_parse(bios, &stbl)
	145	\|\| !stbl.nr_entry)
	146	return 0;
	147
	148	iccsense->rails = kmalloc(sizeof(iccsense->rails) stbl.nr_entry,
	149	GFP_KERNEL);
	150	if (!iccsense->rails)
	151	return -ENOMEM;
	152
	153	iccsense->data_valid = true;
	154	for (i = 0; i < stbl.nr_entry; ++i) {
	155	struct pwr_rail_t *r = &stbl.rail[i];
	156	struct nvbios_extdev_func extdev;
	157	struct nvkm_iccsense_rail *rail;
	158	struct nvkm_i2c_bus *i2c_bus;
	159	u8 addr;
	160
	161	if (!r->mode \|\| r->resistor_mohm == 0)
	162	continue;
	163
	164	if (nvbios_extdev_parse(bios, r->extdev_id, &extdev))
	165	continue;
	166
	167	if (extdev.type == 0xff)
	168	continue;
	169
	170	if (extdev.bus)
	171	i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_SEC);
	172	else
	173	i2c_bus = nvkm_i2c_bus_find(i2c, NVKM_I2C_BUS_PRI);
	174	if (!i2c_bus)
	175	continue;
	176
	177	addr = extdev.addr >> 1;
	178	if (!nvkm_iccsense_validate_device(&i2c_bus->i2c, addr,
	179	extdev.type, r->rail)) {
180	iccsense->data_valid = false;
181	nvkm_warn(subdev, "found unknown or invalid rail entry"
182	" type 0x%x rail %i, power reading might be"
183	" invalid\n", extdev.type, r->rail);
184	continue;
185	}
186
187	rail = &iccsense->rails[iccsense->rail_count];
188	switch (extdev.type) {
189	case NVBIOS_EXTDEV_INA209:
190	rail->read = nvkm_iccsense_ina209_read;
191	break;
192	case NVBIOS_EXTDEV_INA219:
193	rail->read = nvkm_iccsense_ina219_read;
194	break;
195	case NVBIOS_EXTDEV_INA3221:
196	rail->read = nvkm_iccsense_ina3221_read;
197	break;
198	}
199
200	rail->addr = addr;
201	rail->rail = r->rail;
202	rail->mohm = r->resistor_mohm;
203	rail->i2c = &i2c_bus->i2c;
204	++iccsense->rail_count;
205	}
206	return 0;
207	}
208
209	struct nvkm_subdev_func iccsense_func = {
210	.oneinit = nvkm_iccsense_oneinit,
211	.dtor = nvkm_iccsense_dtor,
212	};
dc06e366 MP	213
	214	void
	215	nvkm_iccsense_ctor(struct nvkm_device *device, int index,
	216	struct nvkm_iccsense *iccsense)
	217	{
	218	nvkm_subdev_ctor(&iccsense_func, device, index, 0, &iccsense->subdev);
	219	}
	220
	221	int
	222	nvkm_iccsense_new_(struct nvkm_device *device, int index,
	223	struct nvkm_iccsense **iccsense)
	224	{
	225	if (!(iccsense = kzalloc(sizeof(*iccsense), GFP_KERNEL)))
	226	return -ENOMEM;
	227	nvkm_iccsense_ctor(device, index, *iccsense);
	228	return 0;
	229	}