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/*
* Copyright (c) 2012-2013, NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include "drm.h"
#include "gem.h"
#include "gr2d.h"
struct gr2d {
struct tegra_drm_client client;
struct host1x_channel *channel;
struct clk *clk;
DECLARE_BITMAP(addr_regs, GR2D_NUM_REGS);
};
static inline struct gr2d *to_gr2d(struct tegra_drm_client *client)
{
return container_of(client, struct gr2d, client);
}
static int gr2d_init(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct tegra_drm *tegra = dev_get_drvdata(client->parent);
unsigned long flags = HOST1X_SYNCPT_HAS_BASE;
struct gr2d *gr2d = to_gr2d(drm);
gr2d->channel = host1x_channel_request(client->dev);
if (!gr2d->channel)
return -ENOMEM;
client->syncpts[0] = host1x_syncpt_request(client->dev, flags);
if (!client->syncpts[0]) {
host1x_channel_free(gr2d->channel);
return -ENOMEM;
}
return tegra_drm_register_client(tegra, drm);
}
static int gr2d_exit(struct host1x_client *client)
{
struct tegra_drm_client *drm = host1x_to_drm_client(client);
struct tegra_drm *tegra = dev_get_drvdata(client->parent);
struct gr2d *gr2d = to_gr2d(drm);
int err;
err = tegra_drm_unregister_client(tegra, drm);
if (err < 0)
return err;
host1x_syncpt_free(client->syncpts[0]);
host1x_channel_free(gr2d->channel);
return 0;
}
static const struct host1x_client_ops gr2d_client_ops = {
.init = gr2d_init,
.exit = gr2d_exit,
};
static int gr2d_open_channel(struct tegra_drm_client *client,
struct tegra_drm_context *context)
{
struct gr2d *gr2d = to_gr2d(client);
context->channel = host1x_channel_get(gr2d->channel);
if (!context->channel)
return -ENOMEM;
return 0;
}
static void gr2d_close_channel(struct tegra_drm_context *context)
{
host1x_channel_put(context->channel);
}
static int gr2d_is_addr_reg(struct device *dev, u32 class, u32 offset)
{
struct gr2d *gr2d = dev_get_drvdata(dev);
switch (class) {
case HOST1X_CLASS_HOST1X:
if (offset == 0x2b)
return 1;
break;
case HOST1X_CLASS_GR2D:
case HOST1X_CLASS_GR2D_SB:
if (offset >= GR2D_NUM_REGS)
break;
if (test_bit(offset, gr2d->addr_regs))
return 1;
break;
}
return 0;
}
static const struct tegra_drm_client_ops gr2d_ops = {
.open_channel = gr2d_open_channel,
.close_channel = gr2d_close_channel,
.is_addr_reg = gr2d_is_addr_reg,
.submit = tegra_drm_submit,
};
static const struct of_device_id gr2d_match[] = {
{ .compatible = "nvidia,tegra30-gr2d" },
{ .compatible = "nvidia,tegra20-gr2d" },
{ },
};
static const u32 gr2d_addr_regs[] = {
GR2D_UA_BASE_ADDR,
GR2D_VA_BASE_ADDR,
GR2D_PAT_BASE_ADDR,
GR2D_DSTA_BASE_ADDR,
GR2D_DSTB_BASE_ADDR,
GR2D_DSTC_BASE_ADDR,
GR2D_SRCA_BASE_ADDR,
GR2D_SRCB_BASE_ADDR,
GR2D_SRC_BASE_ADDR_SB,
GR2D_DSTA_BASE_ADDR_SB,
GR2D_DSTB_BASE_ADDR_SB,
GR2D_UA_BASE_ADDR_SB,
GR2D_VA_BASE_ADDR_SB,
};
static int gr2d_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct host1x_syncpt **syncpts;
struct gr2d *gr2d;
unsigned int i;
int err;
gr2d = devm_kzalloc(dev, sizeof(*gr2d), GFP_KERNEL);
if (!gr2d)
return -ENOMEM;
syncpts = devm_kzalloc(dev, sizeof(*syncpts), GFP_KERNEL);
if (!syncpts)
return -ENOMEM;
gr2d->clk = devm_clk_get(dev, NULL);
if (IS_ERR(gr2d->clk)) {
dev_err(dev, "cannot get clock\n");
return PTR_ERR(gr2d->clk);
}
err = clk_prepare_enable(gr2d->clk);
if (err) {
dev_err(dev, "cannot turn on clock\n");
return err;
}
INIT_LIST_HEAD(&gr2d->client.base.list);
gr2d->client.base.ops = &gr2d_client_ops;
gr2d->client.base.dev = dev;
gr2d->client.base.class = HOST1X_CLASS_GR2D;
gr2d->client.base.syncpts = syncpts;
gr2d->client.base.num_syncpts = 1;
INIT_LIST_HEAD(&gr2d->client.list);
gr2d->client.ops = &gr2d_ops;
err = host1x_client_register(&gr2d->client.base);
if (err < 0) {
dev_err(dev, "failed to register host1x client: %d\n", err);
clk_disable_unprepare(gr2d->clk);
return err;
}
/* initialize address register map */
for (i = 0; i < ARRAY_SIZE(gr2d_addr_regs); i++)
set_bit(gr2d_addr_regs[i], gr2d->addr_regs);
platform_set_drvdata(pdev, gr2d);
return 0;
}
static int gr2d_remove(struct platform_device *pdev)
{
struct gr2d *gr2d = platform_get_drvdata(pdev);
int err;
err = host1x_client_unregister(&gr2d->client.base);
if (err < 0) {
dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
err);
return err;
}
clk_disable_unprepare(gr2d->clk);
return 0;
}
struct platform_driver tegra_gr2d_driver = {
.driver = {
.name = "tegra-gr2d",
.of_match_table = gr2d_match,
},
.probe = gr2d_probe,
.remove = gr2d_remove,
};
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