drivers/gpu/host1x/dev.c

   1 /*
   2  * Tegra host1x driver
   3  *
   4  * Copyright (c) 2010-2013, NVIDIA Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/list.h>
  21 #include <linux/slab.h>
  22 #include <linux/of.h>
  23 #include <linux/of_device.h>
  24 #include <linux/clk.h>
  25 #include <linux/io.h>
  26
  27 #define CREATE_TRACE_POINTS
  28 #include <trace/events/host1x.h>
  29
  30 #include "dev.h"
  31 #include "intr.h"
  32 #include "channel.h"
  33 #include "debug.h"
  34 #include "hw/host1x01.h"
  35 #include "host1x_client.h"
  36
  37 void host1x_set_drm_data(struct device *dev, void *data)
  38 {
  39         struct host1x *host1x = dev_get_drvdata(dev);
  40         host1x->drm_data = data;
  41 }
  42
  43 void *host1x_get_drm_data(struct device *dev)
  44 {
  45         struct host1x *host1x = dev_get_drvdata(dev);
  46         return host1x->drm_data;
  47 }
  48
  49 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
  50 {
  51         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  52
  53         writel(v, sync_regs + r);
  54 }
  55
  56 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
  57 {
  58         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  59
  60         return readl(sync_regs + r);
  61 }
  62
  63 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
  64 {
  65         writel(v, ch->regs + r);
  66 }
  67
  68 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
  69 {
  70         return readl(ch->regs + r);
  71 }
  72
  73 static const struct host1x_info host1x01_info = {
  74         .nb_channels    = 8,
  75         .nb_pts         = 32,
  76         .nb_mlocks      = 16,
  77         .nb_bases       = 8,
  78         .init           = host1x01_init,
  79         .sync_offset    = 0x3000,
  80 };
  81
  82 static struct of_device_id host1x_of_match[] = {
  83         { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
  84         { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
  85         { },
  86 };
  87 MODULE_DEVICE_TABLE(of, host1x_of_match);
  88
  89 static int host1x_probe(struct platform_device *pdev)
  90 {
  91         const struct of_device_id *id;
  92         struct host1x *host;
  93         struct resource *regs;
  94         int syncpt_irq;
  95         int err;
  96
  97         id = of_match_device(host1x_of_match, &pdev->dev);
  98         if (!id)
  99                 return -EINVAL;
 100
 101         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 102         if (!regs) {
 103                 dev_err(&pdev->dev, "failed to get registers\n");
 104                 return -ENXIO;
 105         }
 106
 107         syncpt_irq = platform_get_irq(pdev, 0);
 108         if (syncpt_irq < 0) {
 109                 dev_err(&pdev->dev, "failed to get IRQ\n");
 110                 return -ENXIO;
 111         }
 112
 113         host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 114         if (!host)
 115                 return -ENOMEM;
 116
 117         host->dev = &pdev->dev;
 118         host->info = id->data;
 119
 120         /* set common host1x device data */
 121         platform_set_drvdata(pdev, host);
 122
 123         host->regs = devm_ioremap_resource(&pdev->dev, regs);
 124         if (IS_ERR(host->regs))
 125                 return PTR_ERR(host->regs);
 126
 127         if (host->info->init) {
 128                 err = host->info->init(host);
 129                 if (err)
 130                         return err;
 131         }
 132
 133         host->clk = devm_clk_get(&pdev->dev, NULL);
 134         if (IS_ERR(host->clk)) {
 135                 dev_err(&pdev->dev, "failed to get clock\n");
 136                 err = PTR_ERR(host->clk);
 137                 return err;
 138         }
 139
 140         err = host1x_channel_list_init(host);
 141         if (err) {
 142                 dev_err(&pdev->dev, "failed to initialize channel list\n");
 143                 return err;
 144         }
 145
 146         err = clk_prepare_enable(host->clk);
 147         if (err < 0) {
 148                 dev_err(&pdev->dev, "failed to enable clock\n");
 149                 return err;
 150         }
 151
 152         err = host1x_syncpt_init(host);
 153         if (err) {
 154                 dev_err(&pdev->dev, "failed to initialize syncpts\n");
 155                 return err;
 156         }
 157
 158         err = host1x_intr_init(host, syncpt_irq);
 159         if (err) {
 160                 dev_err(&pdev->dev, "failed to initialize interrupts\n");
 161                 goto fail_deinit_syncpt;
 162         }
 163
 164         host1x_debug_init(host);
 165
 166         host1x_drm_alloc(pdev);
 167
 168         return 0;
 169
 170 fail_deinit_syncpt:
 171         host1x_syncpt_deinit(host);
 172         return err;
 173 }
 174
 175 static int __exit host1x_remove(struct platform_device *pdev)
 176 {
 177         struct host1x *host = platform_get_drvdata(pdev);
 178
 179         host1x_intr_deinit(host);
 180         host1x_syncpt_deinit(host);
 181         clk_disable_unprepare(host->clk);
 182
 183         return 0;
 184 }
 185
 186 static struct platform_driver tegra_host1x_driver = {
 187         .probe = host1x_probe,
 188         .remove = __exit_p(host1x_remove),
 189         .driver = {
 190                 .owner = THIS_MODULE,
 191                 .name = "tegra-host1x",
 192                 .of_match_table = host1x_of_match,
 193         },
 194 };
 195
 196 static int __init tegra_host1x_init(void)
 197 {
 198         int err;
 199
 200         err = platform_driver_register(&tegra_host1x_driver);
 201         if (err < 0)
 202                 return err;
 203
 204 #ifdef CONFIG_DRM_TEGRA
 205         err = platform_driver_register(&tegra_dc_driver);
 206         if (err < 0)
 207                 goto unregister_host1x;
 208
 209         err = platform_driver_register(&tegra_hdmi_driver);
 210         if (err < 0)
 211                 goto unregister_dc;
 212
 213         err = platform_driver_register(&tegra_gr2d_driver);
 214         if (err < 0)
 215                 goto unregister_hdmi;
 216 #endif
 217
 218         return 0;
 219
 220 #ifdef CONFIG_DRM_TEGRA
 221 unregister_hdmi:
 222         platform_driver_unregister(&tegra_hdmi_driver);
 223 unregister_dc:
 224         platform_driver_unregister(&tegra_dc_driver);
 225 unregister_host1x:
 226         platform_driver_unregister(&tegra_host1x_driver);
 227         return err;
 228 #endif
 229 }
 230 module_init(tegra_host1x_init);
 231
 232 static void __exit tegra_host1x_exit(void)
 233 {
 234 #ifdef CONFIG_DRM_TEGRA
 235         platform_driver_unregister(&tegra_gr2d_driver);
 236         platform_driver_unregister(&tegra_hdmi_driver);
 237         platform_driver_unregister(&tegra_dc_driver);
 238 #endif
 239         platform_driver_unregister(&tegra_host1x_driver);
 240 }
 241 module_exit(tegra_host1x_exit);
 242
 243 MODULE_AUTHOR("Thierry Reding <[email protected]>");
 244 MODULE_AUTHOR("Terje Bergstrom <[email protected]>");
 245 MODULE_DESCRIPTION("Host1x driver for Tegra products");
 246 MODULE_LICENSE("GPL");