Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 215 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c
new file mode 100644
index 000000000..d063d0dc1
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/i2c/aux.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright 2009 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 <linux/string_helpers.h>
+
+#include "aux.h"
+#include "pad.h"
+
+static int
+nvkm_i2c_aux_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
+{
+	struct nvkm_i2c_aux *aux = container_of(adap, typeof(*aux), i2c);
+	struct i2c_msg *msg = msgs;
+	int ret, mcnt = num;
+
+	ret = nvkm_i2c_aux_acquire(aux);
+	if (ret)
+		return ret;
+
+	while (mcnt--) {
+		u8 remaining = msg->len;
+		u8 *ptr = msg->buf;
+
+		while (remaining) {
+			u8 cnt, retries, cmd;
+
+			if (msg->flags & I2C_M_RD)
+				cmd = 1;
+			else
+				cmd = 0;
+
+			if (mcnt || remaining > 16)
+				cmd |= 4; /* MOT */
+
+			for (retries = 0, cnt = 0;
+			     retries < 32 && !cnt;
+			     retries++) {
+				cnt = min_t(u8, remaining, 16);
+				ret = aux->func->xfer(aux, true, cmd,
+						      msg->addr, ptr, &cnt);
+				if (ret < 0)
+					goto out;
+			}
+			if (!cnt) {
+				AUX_TRACE(aux, "no data after 32 retries");
+				ret = -EIO;
+				goto out;
+			}
+
+			ptr += cnt;
+			remaining -= cnt;
+		}
+
+		msg++;
+	}
+
+	ret = num;
+out:
+	nvkm_i2c_aux_release(aux);
+	return ret;
+}
+
+static u32
+nvkm_i2c_aux_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm
+nvkm_i2c_aux_i2c_algo = {
+	.master_xfer = nvkm_i2c_aux_i2c_xfer,
+	.functionality = nvkm_i2c_aux_i2c_func
+};
+
+void
+nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *aux, bool monitor)
+{
+	struct nvkm_i2c_pad *pad = aux->pad;
+	AUX_TRACE(aux, "monitor: %s", str_yes_no(monitor));
+	if (monitor)
+		nvkm_i2c_pad_mode(pad, NVKM_I2C_PAD_AUX);
+	else
+		nvkm_i2c_pad_mode(pad, NVKM_I2C_PAD_OFF);
+}
+
+void
+nvkm_i2c_aux_release(struct nvkm_i2c_aux *aux)
+{
+	struct nvkm_i2c_pad *pad = aux->pad;
+	AUX_TRACE(aux, "release");
+	nvkm_i2c_pad_release(pad);
+	mutex_unlock(&aux->mutex);
+}
+
+int
+nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *aux)
+{
+	struct nvkm_i2c_pad *pad = aux->pad;
+	int ret;
+
+	AUX_TRACE(aux, "acquire");
+	mutex_lock(&aux->mutex);
+
+	if (aux->enabled)
+		ret = nvkm_i2c_pad_acquire(pad, NVKM_I2C_PAD_AUX);
+	else
+		ret = -EIO;
+
+	if (ret)
+		mutex_unlock(&aux->mutex);
+	return ret;
+}
+
+int
+nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *aux, bool retry, u8 type,
+		  u32 addr, u8 *data, u8 *size)
+{
+	if (!*size && !aux->func->address_only) {
+		AUX_ERR(aux, "address-only transaction dropped");
+		return -ENOSYS;
+	}
+	return aux->func->xfer(aux, retry, type, addr, data, size);
+}
+
+int
+nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *aux, int nr, int bw, bool ef)
+{
+	if (aux->func->lnk_ctl)
+		return aux->func->lnk_ctl(aux, nr, bw, ef);
+	return -ENODEV;
+}
+
+void
+nvkm_i2c_aux_del(struct nvkm_i2c_aux **paux)
+{
+	struct nvkm_i2c_aux *aux = *paux;
+	if (aux && !WARN_ON(!aux->func)) {
+		AUX_TRACE(aux, "dtor");
+		list_del(&aux->head);
+		i2c_del_adapter(&aux->i2c);
+		kfree(*paux);
+		*paux = NULL;
+	}
+}
+
+void
+nvkm_i2c_aux_init(struct nvkm_i2c_aux *aux)
+{
+	AUX_TRACE(aux, "init");
+	mutex_lock(&aux->mutex);
+	aux->enabled = true;
+	mutex_unlock(&aux->mutex);
+}
+
+void
+nvkm_i2c_aux_fini(struct nvkm_i2c_aux *aux)
+{
+	AUX_TRACE(aux, "fini");
+	mutex_lock(&aux->mutex);
+	aux->enabled = false;
+	mutex_unlock(&aux->mutex);
+}
+
+int
+nvkm_i2c_aux_ctor(const struct nvkm_i2c_aux_func *func,
+		  struct nvkm_i2c_pad *pad, int id,
+		  struct nvkm_i2c_aux *aux)
+{
+	struct nvkm_device *device = pad->i2c->subdev.device;
+
+	aux->func = func;
+	aux->pad = pad;
+	aux->id = id;
+	mutex_init(&aux->mutex);
+	list_add_tail(&aux->head, &pad->i2c->aux);
+	AUX_TRACE(aux, "ctor");
+
+	snprintf(aux->i2c.name, sizeof(aux->i2c.name), "nvkm-%s-aux-%04x",
+		 dev_name(device->dev), id);
+	aux->i2c.owner = THIS_MODULE;
+	aux->i2c.dev.parent = device->dev;
+	aux->i2c.algo = &nvkm_i2c_aux_i2c_algo;
+	return i2c_add_adapter(&aux->i2c);
+}
+
+int
+nvkm_i2c_aux_new_(const struct nvkm_i2c_aux_func *func,
+		  struct nvkm_i2c_pad *pad, int id,
+		  struct nvkm_i2c_aux **paux)
+{
+	if (!(*paux = kzalloc(sizeof(**paux), GFP_KERNEL)))
+		return -ENOMEM;
+	return nvkm_i2c_aux_ctor(func, pad, id, *paux);
+}