diff options
Diffstat (limited to 'drivers/gpu/host1x/dev.c')
| -rw-r--r-- | drivers/gpu/host1x/dev.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/dev.c b/drivers/gpu/host1x/dev.c new file mode 100644 index 00000000000..0d6002cb67c --- /dev/null +++ b/drivers/gpu/host1x/dev.c @@ -0,0 +1,153 @@ +/* + * Tegra host1x driver + * + * Copyright (c) 2010-2013, 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/module.h> +#include <linux/list.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/clk.h> +#include <linux/io.h> + +#define CREATE_TRACE_POINTS +#include <trace/events/host1x.h> + +#include "dev.h" +#include "hw/host1x01.h" + +void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r) +{ + void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset; + + writel(v, sync_regs + r); +} + +u32 host1x_sync_readl(struct host1x *host1x, u32 r) +{ + void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset; + + return readl(sync_regs + r); +} + +static const struct host1x_info host1x01_info = { + .nb_channels = 8, + .nb_pts = 32, + .nb_mlocks = 16, + .nb_bases = 8, + .init = host1x01_init, + .sync_offset = 0x3000, +}; + +static struct of_device_id host1x_of_match[] = { + { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, }, + { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, }, + { }, +}; +MODULE_DEVICE_TABLE(of, host1x_of_match); + +static int host1x_probe(struct platform_device *pdev) +{ + const struct of_device_id *id; + struct host1x *host; + struct resource *regs; + int syncpt_irq; + int err; + + id = of_match_device(host1x_of_match, &pdev->dev); + if (!id) + return -EINVAL; + + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(&pdev->dev, "failed to get registers\n"); + return -ENXIO; + } + + syncpt_irq = platform_get_irq(pdev, 0); + if (syncpt_irq < 0) { + dev_err(&pdev->dev, "failed to get IRQ\n"); + return -ENXIO; + } + + host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL); + if (!host) + return -ENOMEM; + + host->dev = &pdev->dev; + host->info = id->data; + + /* set common host1x device data */ + platform_set_drvdata(pdev, host); + + host->regs = devm_ioremap_resource(&pdev->dev, regs); + if (IS_ERR(host->regs)) + return PTR_ERR(host->regs); + + if (host->info->init) { + err = host->info->init(host); + if (err) + return err; + } + + host->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(host->clk)) { + dev_err(&pdev->dev, "failed to get clock\n"); + err = PTR_ERR(host->clk); + return err; + } + + err = clk_prepare_enable(host->clk); + if (err < 0) { + dev_err(&pdev->dev, "failed to enable clock\n"); + return err; + } + + err = host1x_syncpt_init(host); + if (err) { + dev_err(&pdev->dev, "failed to initialize syncpts\n"); + return err; + } + + return 0; +} + +static int __exit host1x_remove(struct platform_device *pdev) +{ + struct host1x *host = platform_get_drvdata(pdev); + + host1x_syncpt_deinit(host); + clk_disable_unprepare(host->clk); + + return 0; +} + +static struct platform_driver platform_driver = { + .probe = host1x_probe, + .remove = __exit_p(host1x_remove), + .driver = { + .owner = THIS_MODULE, + .name = "tegra-host1x", + .of_match_table = host1x_of_match, + }, +}; + +module_platform_driver(platform_driver); + +MODULE_AUTHOR("Terje Bergstrom <tbergstrom@nvidia.com>"); +MODULE_DESCRIPTION("Host1x driver for Tegra products"); +MODULE_LICENSE("GPL"); |