summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c')
-rw-r--r--drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c431
1 files changed, 431 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
new file mode 100644
index 000000000..cb5cb533d
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/base.c
@@ -0,0 +1,431 @@
+/*
+ * 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/notify.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 int
+nvkm_i2c_intr_ctor(struct nvkm_object *object, void *data, u32 size,
+ struct nvkm_notify *notify)
+{
+ struct nvkm_i2c_ntfy_req *req = data;
+ if (!WARN_ON(size != sizeof(*req))) {
+ notify->size = sizeof(struct nvkm_i2c_ntfy_rep);
+ notify->types = req->mask;
+ notify->index = req->port;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static const struct nvkm_event_func
+nvkm_i2c_intr_func = {
+ .ctor = nvkm_i2c_intr_ctor,
+ .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) {
+ struct nvkm_i2c_ntfy_rep rep = {
+ .mask = mask,
+ };
+ nvkm_event_send(&i2c->event, rep.mask, aux->id,
+ &rep, sizeof(rep));
+ }
+ }
+}
+
+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 dcb_i2c_entry ccbE;
+ struct dcb_output dcbE;
+ u8 ver, hdr;
+ int ret, i;
+
+ 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);
+ }
+ }
+ }
+
+ return nvkm_event_init(&nvkm_i2c_intr_func, 4, i, &i2c->event);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 02:33:24 +0000