kernel/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 "bus.h"
  31 #include "dev.h"
  32 #include "intr.h"
  33 #include "channel.h"
  34 #include "debug.h"
  35 #include "hw/host1x01.h"
  36 #include "hw/host1x02.h"
  37 #include "hw/host1x04.h"
  38
  39 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
  40 {
  41         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  42
  43         writel(v, sync_regs + r);
  44 }
  45
  46 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
  47 {
  48         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  49
  50         return readl(sync_regs + r);
  51 }
  52
  53 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
  54 {
  55         writel(v, ch->regs + r);
  56 }
  57
  58 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
  59 {
  60         return readl(ch->regs + r);
  61 }
  62
  63 static const struct host1x_info host1x01_info = {
  64         .nb_channels    = 8,
  65         .nb_pts         = 32,
  66         .nb_mlocks      = 16,
  67         .nb_bases       = 8,
  68         .init           = host1x01_init,
  69         .sync_offset    = 0x3000,
  70 };
  71
  72 static const struct host1x_info host1x02_info = {
  73         .nb_channels = 9,
  74         .nb_pts = 32,
  75         .nb_mlocks = 16,
  76         .nb_bases = 12,
  77         .init = host1x02_init,
  78         .sync_offset = 0x3000,
  79 };
  80
  81 static const struct host1x_info host1x04_info = {
  82         .nb_channels = 12,
  83         .nb_pts = 192,
  84         .nb_mlocks = 16,
  85         .nb_bases = 64,
  86         .init = host1x04_init,
  87         .sync_offset = 0x2100,
  88 };
  89
  90 static struct of_device_id host1x_of_match[] = {
  91         { .compatible = "nvidia,tegra124-host1x", .data = &host1x04_info, },
  92         { .compatible = "nvidia,tegra114-host1x", .data = &host1x02_info, },
  93         { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
  94         { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
  95         { },
  96 };
  97 MODULE_DEVICE_TABLE(of, host1x_of_match);
  98
  99 static int host1x_probe(struct platform_device *pdev)
 100 {
 101         const struct of_device_id *id;
 102         struct host1x *host;
 103         struct resource *regs;
 104         int syncpt_irq;
 105         int err;
 106
 107         id = of_match_device(host1x_of_match, &pdev->dev);
 108         if (!id)
 109                 return -EINVAL;
 110
 111         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 112         if (!regs) {
 113                 dev_err(&pdev->dev, "failed to get registers\n");
 114                 return -ENXIO;
 115         }
 116
 117         syncpt_irq = platform_get_irq(pdev, 0);
 118         if (syncpt_irq < 0) {
 119                 dev_err(&pdev->dev, "failed to get IRQ\n");
 120                 return -ENXIO;
 121         }
 122
 123         host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 124         if (!host)
 125                 return -ENOMEM;
 126
 127         mutex_init(&host->devices_lock);
 128         INIT_LIST_HEAD(&host->devices);
 129         INIT_LIST_HEAD(&host->list);
 130         host->dev = &pdev->dev;
 131         host->info = id->data;
 132
 133         /* set common host1x device data */
 134         platform_set_drvdata(pdev, host);
 135
 136         host->regs = devm_ioremap_resource(&pdev->dev, regs);
 137         if (IS_ERR(host->regs))
 138                 return PTR_ERR(host->regs);
 139
 140         if (host->info->init) {
 141                 err = host->info->init(host);
 142                 if (err)
 143                         return err;
 144         }
 145
 146         host->clk = devm_clk_get(&pdev->dev, NULL);
 147         if (IS_ERR(host->clk)) {
 148                 dev_err(&pdev->dev, "failed to get clock\n");
 149                 err = PTR_ERR(host->clk);
 150                 return err;
 151         }
 152
 153         err = host1x_channel_list_init(host);
 154         if (err) {
 155                 dev_err(&pdev->dev, "failed to initialize channel list\n");
 156                 return err;
 157         }
 158
 159         err = clk_prepare_enable(host->clk);
 160         if (err < 0) {
 161                 dev_err(&pdev->dev, "failed to enable clock\n");
 162                 return err;
 163         }
 164
 165         err = host1x_syncpt_init(host);
 166         if (err) {
 167                 dev_err(&pdev->dev, "failed to initialize syncpts\n");
 168                 goto fail_unprepare_disable;
 169         }
 170
 171         err = host1x_intr_init(host, syncpt_irq);
 172         if (err) {
 173                 dev_err(&pdev->dev, "failed to initialize interrupts\n");
 174                 goto fail_deinit_syncpt;
 175         }
 176
 177         host1x_debug_init(host);
 178
 179         err = host1x_register(host);
 180         if (err < 0)
 181                 goto fail_deinit_intr;
 182
 183         return 0;
 184
 185 fail_deinit_intr:
 186         host1x_intr_deinit(host);
 187 fail_deinit_syncpt:
 188         host1x_syncpt_deinit(host);
 189 fail_unprepare_disable:
 190         clk_disable_unprepare(host->clk);
 191         return err;
 192 }
 193
 194 static int host1x_remove(struct platform_device *pdev)
 195 {
 196         struct host1x *host = platform_get_drvdata(pdev);
 197
 198         host1x_unregister(host);
 199         host1x_intr_deinit(host);
 200         host1x_syncpt_deinit(host);
 201         clk_disable_unprepare(host->clk);
 202
 203         return 0;
 204 }
 205
 206 static struct platform_driver tegra_host1x_driver = {
 207         .driver = {
 208                 .name = "tegra-host1x",
 209                 .of_match_table = host1x_of_match,
 210         },
 211         .probe = host1x_probe,
 212         .remove = host1x_remove,
 213 };
 214
 215 static int __init tegra_host1x_init(void)
 216 {
 217         int err;
 218
 219         err = bus_register(&host1x_bus_type);
 220         if (err < 0)
 221                 return err;
 222
 223         err = platform_driver_register(&tegra_host1x_driver);
 224         if (err < 0)
 225                 goto unregister_bus;
 226
 227         err = platform_driver_register(&tegra_mipi_driver);
 228         if (err < 0)
 229                 goto unregister_host1x;
 230
 231         return 0;
 232
 233 unregister_host1x:
 234         platform_driver_unregister(&tegra_host1x_driver);
 235 unregister_bus:
 236         bus_unregister(&host1x_bus_type);
 237         return err;
 238 }
 239 module_init(tegra_host1x_init);
 240
 241 static void __exit tegra_host1x_exit(void)
 242 {
 243         platform_driver_unregister(&tegra_mipi_driver);
 244         platform_driver_unregister(&tegra_host1x_driver);
 245         bus_unregister(&host1x_bus_type);
 246 }
 247 module_exit(tegra_host1x_exit);
 248
 249 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
 250 MODULE_AUTHOR("Terje Bergstrom <tbergstrom@nvidia.com>");
 251 MODULE_DESCRIPTION("Host1x driver for Tegra products");
 252 MODULE_LICENSE("GPL");