/*
* 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 "priv.h"
#include "aux.h"
#include "bus.h"
#include "pad.h"
#include <core/option.h>
#include <subdev/bios.h>
#include <subdev/bios/dcb.h>
#include <subdev/bios/i2c.h>
static struct nvkm_i2c_pad *
nvkm_i2c_pad_find(struct nvkm_i2c *i2c, int id)
{
struct nvkm_i2c_pad *pad;
list_for_each_entry(pad, &i2c->pad, head) {
if (pad->id == id)
return pad;
}
return NULL;
}
struct nvkm_i2c_bus *
nvkm_i2c_bus_find(struct nvkm_i2c *i2c, int id)
{
struct nvkm_bios *bios = i2c->subdev.device->bios;
struct nvkm_i2c_bus *bus;
if (id == NVKM_I2C_BUS_PRI || id == NVKM_I2C_BUS_SEC) {
u8 ver, hdr, cnt, len;
u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len);
if (i2c && ver >= 0x30) {
u8 auxidx = nvbios_rd08(bios, i2c + 4);
if (id == NVKM_I2C_BUS_PRI)
id = NVKM_I2C_BUS_CCB((auxidx & 0x0f) >> 0);
else
id = NVKM_I2C_BUS_CCB((auxidx & 0xf0) >> 4);
} else {
id = NVKM_I2C_BUS_CCB(2);
}
}
list_for_each_entry(bus, &i2c->bus, head) {
if (bus->id == id)
return bus;
}
return NULL;
}
struct nvkm_i2c_aux *
nvkm_i2c_aux_find(struct nvkm_i2c *i2c, int id)
{
struct nvkm_i2c_aux *aux;
list_for_each_entry(aux, &i2c->aux, head) {
if (aux->id == id)
return aux;
}
return NULL;
}
static void
nvkm_i2c_intr_fini(struct nvkm_event *event, int type, int id)
{
struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
if (aux)
i2c->func->aux_mask(i2c, type, aux->intr, 0);
}
static void
nvkm_i2c_intr_init(struct nvkm_event *event, int type, int id)
{
struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
if (aux)
i2c->func->aux_mask(i2c, type, aux->intr, aux->intr);
}
static const struct nvkm_event_func
nvkm_i2c_intr_func = {
.init = nvkm_i2c_intr_init,
.fini = nvkm_i2c_intr_fini,
};
static void
nvkm_i2c_intr(struct nvkm_subdev *subdev)
{
struct nvkm_i2c *i2c = nvkm_i2c(subdev);
struct nvkm_i2c_aux *aux;
u32 hi, lo, rq, tx;
if (!i2c->func->aux_stat)
return;
i2c->func->aux_stat(i2c, &hi, &lo, &rq, &tx);
if (!hi && !lo && !rq && !tx)
return;
list_for_each_entry(aux, &i2c->aux, head) {
u32 mask = 0;
if (hi & aux->intr) mask |= NVKM_I2C_PLUG;
if (lo & aux->intr) mask |= NVKM_I2C_UNPLUG;
if (rq & aux->intr) mask |= NVKM_I2C_IRQ;
if (tx & aux->intr) mask |= NVKM_I2C_DONE;
if (mask)
nvkm_event_ntfy(&i2c->event, aux->id, mask);
}
}
static int
nvkm_i2c_fini(struct nvkm_subdev *subdev, bool suspend)
{
struct nvkm_i2c *i2c = nvkm_i2c(subdev);
struct nvkm_i2c_pad *pad;
struct nvkm_i2c_bus *bus;
struct nvkm_i2c_aux *aux;
u32 mask;
list_for_each_entry(aux, &i2c->aux, head) {
nvkm_i2c_aux_fini(aux);
}
list_for_each_entry(bus, &i2c->bus, head) {
nvkm_i2c_bus_fini(bus);
}
if ((mask = (1 << i2c->func->aux) - 1), i2c->func->aux_stat) {
i2c->func->aux_mask(i2c, NVKM_I2C_ANY, mask, 0);
i2c->func->aux_stat(i2c, &mask, &mask, &mask, &mask);
}
list_for_each_entry(pad, &i2c->pad, head) {
nvkm_i2c_pad_fini(pad);
}
return 0;
}
static int
nvkm_i2c_preinit(struct nvkm_subdev *subdev)
{
struct nvkm_i2c *i2c = nvkm_i2c(subdev);
struct nvkm_i2c_bus *bus;
struct nvkm_i2c_pad *pad;
/*
* We init our i2c busses as early as possible, since they may be
* needed by the vbios init scripts on some cards
*/
list_for_each_entry(pad, &i2c->pad, head)
nvkm_i2c_pad_init(pad);
list_for_each_entry(bus, &i2c->bus, head)
nvkm_i2c_bus_init(bus);
return 0;
}
static int
nvkm_i2c_init(struct nvkm_subdev *subdev)
{
struct nvkm_i2c *i2c = nvkm_i2c(subdev);
struct nvkm_i2c_bus *bus;
struct nvkm_i2c_pad *pad;
struct nvkm_i2c_aux *aux;
list_for_each_entry(pad, &i2c->pad, head) {
nvkm_i2c_pad_init(pad);
}
list_for_each_entry(bus, &i2c->bus, head) {
nvkm_i2c_bus_init(bus);
}
list_for_each_entry(aux, &i2c->aux, head) {
nvkm_i2c_aux_init(aux);
}
return 0;
}
static void *
nvkm_i2c_dtor(struct nvkm_subdev *subdev)
{
struct nvkm_i2c *i2c = nvkm_i2c(subdev);
nvkm_event_fini(&i2c->event);
while (!list_empty(&i2c->aux)) {
struct nvkm_i2c_aux *aux =
list_first_entry(&i2c->aux, typeof(*aux), head);
nvkm_i2c_aux_del(&aux);
}
while (!list_empty(&i2c->bus)) {
struct nvkm_i2c_bus *bus =
list_first_entry(&i2c->bus, typeof(*bus), head);
nvkm_i2c_bus_del(&bus);
}
while (!list_empty(&i2c->pad)) {
struct nvkm_i2c_pad *pad =
list_first_entry(&i2c->pad, typeof(*pad), head);
nvkm_i2c_pad_del(&pad);
}
return i2c;
}
static const struct nvkm_subdev_func
nvkm_i2c = {
.dtor = nvkm_i2c_dtor,
.preinit = nvkm_i2c_preinit,
.init = nvkm_i2c_init,
.fini = nvkm_i2c_fini,
.intr = nvkm_i2c_intr,
};
static const struct nvkm_i2c_drv {
u8 bios;
u8 addr;
int (*pad_new)(struct nvkm_i2c_bus *, int id, u8 addr,
struct nvkm_i2c_pad **);
}
nvkm_i2c_drv[] = {
{ 0x0d, 0x39, anx9805_pad_new },
{ 0x0e, 0x3b, anx9805_pad_new },
{}
};
int
nvkm_i2c_new_(const struct nvkm_i2c_func *func, struct nvkm_device *device,
enum nvkm_subdev_type type, int inst, struct nvkm_i2c **pi2c)
{
struct nvkm_bios *bios = device->bios;
struct nvkm_i2c *i2c;
struct nvkm_i2c_aux *aux;
struct dcb_i2c_entry ccbE;
struct dcb_output dcbE;
u8 ver, hdr;
int ret, i, ids;
if (!(i2c = *pi2c = kzalloc(sizeof(*i2c), GFP_KERNEL)))
return -ENOMEM;
nvkm_subdev_ctor(&nvkm_i2c, device, type, inst, &i2c->subdev);
i2c->func = func;
INIT_LIST_HEAD(&i2c->pad);
INIT_LIST_HEAD(&i2c->bus);
INIT_LIST_HEAD(&i2c->aux);
i = -1;
while (!dcb_i2c_parse(bios, ++i, &ccbE)) {
struct nvkm_i2c_pad *pad = NULL;
struct nvkm_i2c_bus *bus = NULL;
struct nvkm_i2c_aux *aux = NULL;
nvkm_debug(&i2c->subdev, "ccb %02x: type %02x drive %02x "
"sense %02x share %02x auxch %02x\n", i, ccbE.type,
ccbE.drive, ccbE.sense, ccbE.share, ccbE.auxch);
if (ccbE.share != DCB_I2C_UNUSED) {
const int id = NVKM_I2C_PAD_HYBRID(ccbE.share);
if (!(pad = nvkm_i2c_pad_find(i2c, id)))
ret = func->pad_s_new(i2c, id, &pad);
else
ret = 0;
} else {
ret = func->pad_x_new(i2c, NVKM_I2C_PAD_CCB(i), &pad);
}
if (ret) {
nvkm_error(&i2c->subdev, "ccb %02x pad, %d\n", i, ret);
nvkm_i2c_pad_del(&pad);
continue;
}
if (pad->func->bus_new_0 && ccbE.type == DCB_I2C_NV04_BIT) {
ret = pad->func->bus_new_0(pad, NVKM_I2C_BUS_CCB(i),
ccbE.drive,
ccbE.sense, &bus);
} else
if (pad->func->bus_new_4 &&
( ccbE.type == DCB_I2C_NV4E_BIT ||
ccbE.type == DCB_I2C_NVIO_BIT ||
(ccbE.type == DCB_I2C_PMGR &&
ccbE.drive != DCB_I2C_UNUSED))) {
ret = pad->func->bus_new_4(pad, NVKM_I2C_BUS_CCB(i),
ccbE.drive, &bus);
}
if (ret) {
nvkm_error(&i2c->subdev, "ccb %02x bus, %d\n", i, ret);
nvkm_i2c_bus_del(&bus);
}
if (pad->func->aux_new_6 &&
( ccbE.type == DCB_I2C_NVIO_AUX ||
(ccbE.type == DCB_I2C_PMGR &&
ccbE.auxch != DCB_I2C_UNUSED))) {
ret = pad->func->aux_new_6(pad, NVKM_I2C_BUS_CCB(i),
ccbE.auxch, &aux);
} else {
ret = 0;
}
if (ret) {
nvkm_error(&i2c->subdev, "ccb %02x aux, %d\n", i, ret);
nvkm_i2c_aux_del(&aux);
}
if (ccbE.type != DCB_I2C_UNUSED && !bus && !aux) {
nvkm_warn(&i2c->subdev, "ccb %02x was ignored\n", i);
continue;
}
}
i = -1;
while (dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE)) {
const struct nvkm_i2c_drv *drv = nvkm_i2c_drv;
struct nvkm_i2c_bus *bus;
struct nvkm_i2c_pad *pad;
/* internal outputs handled by native i2c busses (above) */
if (!dcbE.location)
continue;
/* we need an i2c bus to talk to the external encoder */
bus = nvkm_i2c_bus_find(i2c, dcbE.i2c_index);
if (!bus) {
nvkm_debug(&i2c->subdev, "dcb %02x no bus\n", i);
continue;
}
/* ... and a driver for it */
while (drv->pad_new) {
if (drv->bios == dcbE.extdev)
break;
drv++;
}
if (!drv->pad_new) {
nvkm_debug(&i2c->subdev, "dcb %02x drv %02x unknown\n",
i, dcbE.extdev);
continue;
}
/* find/create an instance of the driver */
pad = nvkm_i2c_pad_find(i2c, NVKM_I2C_PAD_EXT(dcbE.extdev));
if (!pad) {
const int id = NVKM_I2C_PAD_EXT(dcbE.extdev);
ret = drv->pad_new(bus, id, drv->addr, &pad);
if (ret) {
nvkm_error(&i2c->subdev, "dcb %02x pad, %d\n",
i, ret);
nvkm_i2c_pad_del(&pad);
continue;
}
}
/* create any i2c bus / aux channel required by the output */
if (pad->func->aux_new_6 && dcbE.type == DCB_OUTPUT_DP) {
const int id = NVKM_I2C_AUX_EXT(dcbE.extdev);
struct nvkm_i2c_aux *aux = NULL;
ret = pad->func->aux_new_6(pad, id, 0, &aux);
if (ret) {
nvkm_error(&i2c->subdev, "dcb %02x aux, %d\n",
i, ret);
nvkm_i2c_aux_del(&aux);
}
} else
if (pad->func->bus_new_4) {
const int id = NVKM_I2C_BUS_EXT(dcbE.extdev);
struct nvkm_i2c_bus *bus = NULL;
ret = pad->func->bus_new_4(pad, id, 0, &bus);
if (ret) {
nvkm_error(&i2c->subdev, "dcb %02x bus, %d\n",
i, ret);
nvkm_i2c_bus_del(&bus);
}
}
}
ids = 0;
list_for_each_entry(aux, &i2c->aux, head)
ids = max(ids, aux->id + 1);
if (!ids)
return 0;
return nvkm_event_init(&nvkm_i2c_intr_func, &i2c->subdev, 4, ids, &i2c->event);
}
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