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
  37 void host1x_sync_writel(struct host1x *host1x, u32 v, u32 r)
  38 {
  39         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  40
  41         writel(v, sync_regs + r);
  42 }
  43
  44 u32 host1x_sync_readl(struct host1x *host1x, u32 r)
  45 {
  46         void __iomem *sync_regs = host1x->regs + host1x->info->sync_offset;
  47
  48         return readl(sync_regs + r);
  49 }
  50
  51 void host1x_ch_writel(struct host1x_channel *ch, u32 v, u32 r)
  52 {
  53         writel(v, ch->regs + r);
  54 }
  55
  56 u32 host1x_ch_readl(struct host1x_channel *ch, u32 r)
  57 {
  58         return readl(ch->regs + r);
  59 }
  60
  61 static const struct host1x_info host1x01_info = {
  62         .nb_channels    = 8,
  63         .nb_pts         = 32,
  64         .nb_mlocks      = 16,
  65         .nb_bases       = 8,
  66         .init           = host1x01_init,
  67         .sync_offset    = 0x3000,
  68 };
  69
  70 static struct of_device_id host1x_of_match[] = {
  71         { .compatible = "nvidia,tegra30-host1x", .data = &host1x01_info, },
  72         { .compatible = "nvidia,tegra20-host1x", .data = &host1x01_info, },
  73         { },
  74 };
  75 MODULE_DEVICE_TABLE(of, host1x_of_match);
  76
  77 static int host1x_probe(struct platform_device *pdev)
  78 {
  79         const struct of_device_id *id;
  80         struct host1x *host;
  81         struct resource *regs;
  82         int syncpt_irq;
  83         int err;
  84
  85         id = of_match_device(host1x_of_match, &pdev->dev);
  86         if (!id)
  87                 return -EINVAL;
  88
  89         regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  90         if (!regs) {
  91                 dev_err(&pdev->dev, "failed to get registers\n");
  92                 return -ENXIO;
  93         }
  94
  95         syncpt_irq = platform_get_irq(pdev, 0);
  96         if (syncpt_irq < 0) {
  97                 dev_err(&pdev->dev, "failed to get IRQ\n");
  98                 return -ENXIO;
  99         }
 100
 101         host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
 102         if (!host)
 103                 return -ENOMEM;
 104
 105         mutex_init(&host->devices_lock);
 106         INIT_LIST_HEAD(&host->devices);
 107         INIT_LIST_HEAD(&host->list);
 108         host->dev = &pdev->dev;
 109         host->info = id->data;
 110
 111         /* set common host1x device data */
 112         platform_set_drvdata(pdev, host);
 113
 114         host->regs = devm_ioremap_resource(&pdev->dev, regs);
 115         if (IS_ERR(host->regs))
 116                 return PTR_ERR(host->regs);
 117
 118         if (host->info->init) {
 119                 err = host->info->init(host);
 120                 if (err)
 121                         return err;
 122         }
 123
 124         host->clk = devm_clk_get(&pdev->dev, NULL);
 125         if (IS_ERR(host->clk)) {
 126                 dev_err(&pdev->dev, "failed to get clock\n");
 127                 err = PTR_ERR(host->clk);
 128                 return err;
 129         }
 130
 131         err = host1x_channel_list_init(host);
 132         if (err) {
 133                 dev_err(&pdev->dev, "failed to initialize channel list\n");
 134                 return err;
 135         }
 136
 137         err = clk_prepare_enable(host->clk);
 138         if (err < 0) {
 139                 dev_err(&pdev->dev, "failed to enable clock\n");
 140                 return err;
 141         }
 142
 143         err = host1x_syncpt_init(host);
 144         if (err) {
 145                 dev_err(&pdev->dev, "failed to initialize syncpts\n");
 146                 return err;
 147         }
 148
 149         err = host1x_intr_init(host, syncpt_irq);
 150         if (err) {
 151                 dev_err(&pdev->dev, "failed to initialize interrupts\n");
 152                 goto fail_deinit_syncpt;
 153         }
 154
 155         host1x_debug_init(host);
 156
 157         err = host1x_register(host);
 158         if (err < 0)
 159                 goto fail_deinit_intr;
 160
 161         return 0;
 162
 163 fail_deinit_intr:
 164         host1x_intr_deinit(host);
 165 fail_deinit_syncpt:
 166         host1x_syncpt_deinit(host);
 167         return err;
 168 }
 169
 170 static int host1x_remove(struct platform_device *pdev)
 171 {
 172         struct host1x *host = platform_get_drvdata(pdev);
 173
 174         host1x_unregister(host);
 175         host1x_intr_deinit(host);
 176         host1x_syncpt_deinit(host);
 177         clk_disable_unprepare(host->clk);
 178
 179         return 0;
 180 }
 181
 182 static struct platform_driver tegra_host1x_driver = {
 183         .driver = {
 184                 .name = "tegra-host1x",
 185                 .of_match_table = host1x_of_match,
 186         },
 187         .probe = host1x_probe,
 188         .remove = host1x_remove,
 189 };
 190
 191 static int __init tegra_host1x_init(void)
 192 {
 193         int err;
 194
 195         err = host1x_bus_init();
 196         if (err < 0)
 197                 return err;
 198
 199         err = platform_driver_register(&tegra_host1x_driver);
 200         if (err < 0) {
 201                 host1x_bus_exit();
 202                 return err;
 203         }
 204
 205         return 0;
 206 }
 207 module_init(tegra_host1x_init);
 208
 209 static void __exit tegra_host1x_exit(void)
 210 {
 211         platform_driver_unregister(&tegra_host1x_driver);
 212         host1x_bus_exit();
 213 }
 214 module_exit(tegra_host1x_exit);
 215
 216 MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
 217 MODULE_AUTHOR("Terje Bergstrom <tbergstrom@nvidia.com>");
 218 MODULE_DESCRIPTION("Host1x driver for Tegra products");
 219 MODULE_LICENSE("GPL");