418 lines
10 KiB
C
418 lines
10 KiB
C
/*
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* Copyright 2013 Red Hat Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Ben Skeggs
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*/
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#include "priv.h"
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#include "aux.h"
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#include "bus.h"
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#include "pad.h"
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#include <core/option.h>
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#include <subdev/bios.h>
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#include <subdev/bios/dcb.h>
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#include <subdev/bios/i2c.h>
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static struct nvkm_i2c_pad *
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nvkm_i2c_pad_find(struct nvkm_i2c *i2c, int id)
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{
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struct nvkm_i2c_pad *pad;
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list_for_each_entry(pad, &i2c->pad, head) {
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if (pad->id == id)
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return pad;
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}
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return NULL;
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}
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struct nvkm_i2c_bus *
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nvkm_i2c_bus_find(struct nvkm_i2c *i2c, int id)
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{
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struct nvkm_bios *bios = i2c->subdev.device->bios;
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struct nvkm_i2c_bus *bus;
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if (id == NVKM_I2C_BUS_PRI || id == NVKM_I2C_BUS_SEC) {
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u8 ver, hdr, cnt, len;
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u16 i2c = dcb_i2c_table(bios, &ver, &hdr, &cnt, &len);
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if (i2c && ver >= 0x30) {
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u8 auxidx = nvbios_rd08(bios, i2c + 4);
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if (id == NVKM_I2C_BUS_PRI)
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id = NVKM_I2C_BUS_CCB((auxidx & 0x0f) >> 0);
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else
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id = NVKM_I2C_BUS_CCB((auxidx & 0xf0) >> 4);
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} else {
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id = NVKM_I2C_BUS_CCB(2);
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}
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}
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list_for_each_entry(bus, &i2c->bus, head) {
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if (bus->id == id)
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return bus;
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}
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return NULL;
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}
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struct nvkm_i2c_aux *
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nvkm_i2c_aux_find(struct nvkm_i2c *i2c, int id)
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{
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struct nvkm_i2c_aux *aux;
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list_for_each_entry(aux, &i2c->aux, head) {
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if (aux->id == id)
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return aux;
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}
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return NULL;
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}
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static void
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nvkm_i2c_intr_fini(struct nvkm_event *event, int type, int id)
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{
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struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
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struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
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if (aux)
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i2c->func->aux_mask(i2c, type, aux->intr, 0);
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}
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static void
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nvkm_i2c_intr_init(struct nvkm_event *event, int type, int id)
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{
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struct nvkm_i2c *i2c = container_of(event, typeof(*i2c), event);
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struct nvkm_i2c_aux *aux = nvkm_i2c_aux_find(i2c, id);
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if (aux)
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i2c->func->aux_mask(i2c, type, aux->intr, aux->intr);
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}
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static const struct nvkm_event_func
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nvkm_i2c_intr_func = {
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.init = nvkm_i2c_intr_init,
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.fini = nvkm_i2c_intr_fini,
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};
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static void
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nvkm_i2c_intr(struct nvkm_subdev *subdev)
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{
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struct nvkm_i2c *i2c = nvkm_i2c(subdev);
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struct nvkm_i2c_aux *aux;
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u32 hi, lo, rq, tx;
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if (!i2c->func->aux_stat)
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return;
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i2c->func->aux_stat(i2c, &hi, &lo, &rq, &tx);
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if (!hi && !lo && !rq && !tx)
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return;
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list_for_each_entry(aux, &i2c->aux, head) {
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u32 mask = 0;
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if (hi & aux->intr) mask |= NVKM_I2C_PLUG;
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if (lo & aux->intr) mask |= NVKM_I2C_UNPLUG;
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if (rq & aux->intr) mask |= NVKM_I2C_IRQ;
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if (tx & aux->intr) mask |= NVKM_I2C_DONE;
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if (mask)
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nvkm_event_ntfy(&i2c->event, aux->id, mask);
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}
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}
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static int
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nvkm_i2c_fini(struct nvkm_subdev *subdev, bool suspend)
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{
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struct nvkm_i2c *i2c = nvkm_i2c(subdev);
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struct nvkm_i2c_pad *pad;
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struct nvkm_i2c_bus *bus;
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struct nvkm_i2c_aux *aux;
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u32 mask;
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list_for_each_entry(aux, &i2c->aux, head) {
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nvkm_i2c_aux_fini(aux);
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}
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list_for_each_entry(bus, &i2c->bus, head) {
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nvkm_i2c_bus_fini(bus);
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}
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if ((mask = (1 << i2c->func->aux) - 1), i2c->func->aux_stat) {
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i2c->func->aux_mask(i2c, NVKM_I2C_ANY, mask, 0);
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i2c->func->aux_stat(i2c, &mask, &mask, &mask, &mask);
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}
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list_for_each_entry(pad, &i2c->pad, head) {
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nvkm_i2c_pad_fini(pad);
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}
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return 0;
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}
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static int
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nvkm_i2c_preinit(struct nvkm_subdev *subdev)
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{
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struct nvkm_i2c *i2c = nvkm_i2c(subdev);
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struct nvkm_i2c_bus *bus;
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struct nvkm_i2c_pad *pad;
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/*
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* We init our i2c busses as early as possible, since they may be
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* needed by the vbios init scripts on some cards
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*/
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list_for_each_entry(pad, &i2c->pad, head)
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nvkm_i2c_pad_init(pad);
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list_for_each_entry(bus, &i2c->bus, head)
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nvkm_i2c_bus_init(bus);
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return 0;
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}
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static int
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nvkm_i2c_init(struct nvkm_subdev *subdev)
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{
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struct nvkm_i2c *i2c = nvkm_i2c(subdev);
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struct nvkm_i2c_bus *bus;
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struct nvkm_i2c_pad *pad;
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struct nvkm_i2c_aux *aux;
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list_for_each_entry(pad, &i2c->pad, head) {
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nvkm_i2c_pad_init(pad);
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}
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list_for_each_entry(bus, &i2c->bus, head) {
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nvkm_i2c_bus_init(bus);
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}
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list_for_each_entry(aux, &i2c->aux, head) {
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nvkm_i2c_aux_init(aux);
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}
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return 0;
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}
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static void *
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nvkm_i2c_dtor(struct nvkm_subdev *subdev)
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{
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struct nvkm_i2c *i2c = nvkm_i2c(subdev);
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nvkm_event_fini(&i2c->event);
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while (!list_empty(&i2c->aux)) {
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struct nvkm_i2c_aux *aux =
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list_first_entry(&i2c->aux, typeof(*aux), head);
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nvkm_i2c_aux_del(&aux);
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}
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while (!list_empty(&i2c->bus)) {
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struct nvkm_i2c_bus *bus =
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list_first_entry(&i2c->bus, typeof(*bus), head);
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nvkm_i2c_bus_del(&bus);
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}
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while (!list_empty(&i2c->pad)) {
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struct nvkm_i2c_pad *pad =
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list_first_entry(&i2c->pad, typeof(*pad), head);
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nvkm_i2c_pad_del(&pad);
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}
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return i2c;
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}
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static const struct nvkm_subdev_func
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nvkm_i2c = {
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.dtor = nvkm_i2c_dtor,
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.preinit = nvkm_i2c_preinit,
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.init = nvkm_i2c_init,
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.fini = nvkm_i2c_fini,
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.intr = nvkm_i2c_intr,
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};
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static const struct nvkm_i2c_drv {
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u8 bios;
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u8 addr;
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int (*pad_new)(struct nvkm_i2c_bus *, int id, u8 addr,
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struct nvkm_i2c_pad **);
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}
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nvkm_i2c_drv[] = {
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{ 0x0d, 0x39, anx9805_pad_new },
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{ 0x0e, 0x3b, anx9805_pad_new },
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{}
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};
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int
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nvkm_i2c_new_(const struct nvkm_i2c_func *func, struct nvkm_device *device,
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enum nvkm_subdev_type type, int inst, struct nvkm_i2c **pi2c)
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{
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struct nvkm_bios *bios = device->bios;
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struct nvkm_i2c *i2c;
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struct nvkm_i2c_aux *aux;
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struct dcb_i2c_entry ccbE;
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struct dcb_output dcbE;
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u8 ver, hdr;
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int ret, i, ids;
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if (!(i2c = *pi2c = kzalloc(sizeof(*i2c), GFP_KERNEL)))
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return -ENOMEM;
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nvkm_subdev_ctor(&nvkm_i2c, device, type, inst, &i2c->subdev);
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i2c->func = func;
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INIT_LIST_HEAD(&i2c->pad);
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INIT_LIST_HEAD(&i2c->bus);
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INIT_LIST_HEAD(&i2c->aux);
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i = -1;
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while (!dcb_i2c_parse(bios, ++i, &ccbE)) {
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struct nvkm_i2c_pad *pad = NULL;
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struct nvkm_i2c_bus *bus = NULL;
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struct nvkm_i2c_aux *aux = NULL;
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nvkm_debug(&i2c->subdev, "ccb %02x: type %02x drive %02x "
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"sense %02x share %02x auxch %02x\n", i, ccbE.type,
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ccbE.drive, ccbE.sense, ccbE.share, ccbE.auxch);
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if (ccbE.share != DCB_I2C_UNUSED) {
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const int id = NVKM_I2C_PAD_HYBRID(ccbE.share);
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if (!(pad = nvkm_i2c_pad_find(i2c, id)))
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ret = func->pad_s_new(i2c, id, &pad);
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else
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ret = 0;
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} else {
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ret = func->pad_x_new(i2c, NVKM_I2C_PAD_CCB(i), &pad);
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}
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if (ret) {
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nvkm_error(&i2c->subdev, "ccb %02x pad, %d\n", i, ret);
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nvkm_i2c_pad_del(&pad);
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continue;
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}
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if (pad->func->bus_new_0 && ccbE.type == DCB_I2C_NV04_BIT) {
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ret = pad->func->bus_new_0(pad, NVKM_I2C_BUS_CCB(i),
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ccbE.drive,
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ccbE.sense, &bus);
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} else
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if (pad->func->bus_new_4 &&
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( ccbE.type == DCB_I2C_NV4E_BIT ||
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ccbE.type == DCB_I2C_NVIO_BIT ||
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(ccbE.type == DCB_I2C_PMGR &&
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ccbE.drive != DCB_I2C_UNUSED))) {
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ret = pad->func->bus_new_4(pad, NVKM_I2C_BUS_CCB(i),
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ccbE.drive, &bus);
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}
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if (ret) {
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nvkm_error(&i2c->subdev, "ccb %02x bus, %d\n", i, ret);
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nvkm_i2c_bus_del(&bus);
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}
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if (pad->func->aux_new_6 &&
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( ccbE.type == DCB_I2C_NVIO_AUX ||
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(ccbE.type == DCB_I2C_PMGR &&
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ccbE.auxch != DCB_I2C_UNUSED))) {
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ret = pad->func->aux_new_6(pad, NVKM_I2C_BUS_CCB(i),
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ccbE.auxch, &aux);
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} else {
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ret = 0;
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}
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if (ret) {
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nvkm_error(&i2c->subdev, "ccb %02x aux, %d\n", i, ret);
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nvkm_i2c_aux_del(&aux);
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}
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if (ccbE.type != DCB_I2C_UNUSED && !bus && !aux) {
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nvkm_warn(&i2c->subdev, "ccb %02x was ignored\n", i);
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continue;
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}
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}
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i = -1;
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while (dcb_outp_parse(bios, ++i, &ver, &hdr, &dcbE)) {
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const struct nvkm_i2c_drv *drv = nvkm_i2c_drv;
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struct nvkm_i2c_bus *bus;
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struct nvkm_i2c_pad *pad;
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/* internal outputs handled by native i2c busses (above) */
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if (!dcbE.location)
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continue;
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/* we need an i2c bus to talk to the external encoder */
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bus = nvkm_i2c_bus_find(i2c, dcbE.i2c_index);
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if (!bus) {
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nvkm_debug(&i2c->subdev, "dcb %02x no bus\n", i);
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continue;
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}
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/* ... and a driver for it */
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while (drv->pad_new) {
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if (drv->bios == dcbE.extdev)
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break;
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drv++;
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}
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if (!drv->pad_new) {
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nvkm_debug(&i2c->subdev, "dcb %02x drv %02x unknown\n",
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i, dcbE.extdev);
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continue;
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}
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/* find/create an instance of the driver */
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pad = nvkm_i2c_pad_find(i2c, NVKM_I2C_PAD_EXT(dcbE.extdev));
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if (!pad) {
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const int id = NVKM_I2C_PAD_EXT(dcbE.extdev);
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ret = drv->pad_new(bus, id, drv->addr, &pad);
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if (ret) {
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nvkm_error(&i2c->subdev, "dcb %02x pad, %d\n",
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i, ret);
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nvkm_i2c_pad_del(&pad);
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continue;
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}
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}
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/* create any i2c bus / aux channel required by the output */
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if (pad->func->aux_new_6 && dcbE.type == DCB_OUTPUT_DP) {
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const int id = NVKM_I2C_AUX_EXT(dcbE.extdev);
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struct nvkm_i2c_aux *aux = NULL;
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ret = pad->func->aux_new_6(pad, id, 0, &aux);
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if (ret) {
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nvkm_error(&i2c->subdev, "dcb %02x aux, %d\n",
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i, ret);
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nvkm_i2c_aux_del(&aux);
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}
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} else
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if (pad->func->bus_new_4) {
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const int id = NVKM_I2C_BUS_EXT(dcbE.extdev);
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struct nvkm_i2c_bus *bus = NULL;
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ret = pad->func->bus_new_4(pad, id, 0, &bus);
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if (ret) {
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nvkm_error(&i2c->subdev, "dcb %02x bus, %d\n",
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i, ret);
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nvkm_i2c_bus_del(&bus);
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}
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}
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}
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ids = 0;
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list_for_each_entry(aux, &i2c->aux, head)
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ids = max(ids, aux->id + 1);
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if (!ids)
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return 0;
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return nvkm_event_init(&nvkm_i2c_intr_func, &i2c->subdev, 4, ids, &i2c->event);
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}
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