arch/arm/mach-omap2/dsp.c

   1 /*
   2  * TI's OMAP DSP platform device registration
   3  *
   4  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   5  * Copyright (C) 2009 Nokia Corporation
   6  *
   7  * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 /*
  15  * XXX The function pointers to the PRM/CM functions are incorrect and
  16  * should be removed.  No device driver should be changing PRM/CM bits
  17  * directly; that's a layering violation -- those bits are the responsibility
  18  * of the OMAP PM core code.
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/platform_device.h>
  23 #include "cm2xxx_3xxx.h"
  24 #include "prm2xxx_3xxx.h"
  25 #ifdef CONFIG_BRIDGE_DVFS
  26 #include <plat/omap-pm.h>
  27 #endif
  28
  29 #include <plat/dsp.h>
  30
  31 static struct platform_device *omap_dsp_pdev;
  32
  33 static struct omap_dsp_platform_data omap_dsp_pdata __initdata = {
  34 #ifdef CONFIG_BRIDGE_DVFS
  35         .dsp_set_min_opp = omap_pm_dsp_set_min_opp,
  36         .dsp_get_opp = omap_pm_dsp_get_opp,
  37         .cpu_set_freq = omap_pm_cpu_set_freq,
  38         .cpu_get_freq = omap_pm_cpu_get_freq,
  39 #endif
  40         .dsp_prm_read = omap2_prm_read_mod_reg,
  41         .dsp_prm_write = omap2_prm_write_mod_reg,
  42         .dsp_prm_rmw_bits = omap2_prm_rmw_mod_reg_bits,
  43         .dsp_cm_read = omap2_cm_read_mod_reg,
  44         .dsp_cm_write = omap2_cm_write_mod_reg,
  45         .dsp_cm_rmw_bits = omap2_cm_rmw_mod_reg_bits,
  46 };
  47
  48 static phys_addr_t omap_dsp_phys_mempool_base;
  49
  50 void __init omap_dsp_reserve_sdram_memblock(void)
  51 {
  52         phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  53         phys_addr_t paddr;
  54
  55         if (!size)
  56                 return;
  57
  58         paddr = arm_memblock_steal(size, SZ_1M);
  59         if (!paddr) {
  60                 pr_err("%s: failed to reserve %llx bytes\n",
  61                                 __func__, (unsigned long long)size);
  62                 return;
  63         }
  64
  65         omap_dsp_phys_mempool_base = paddr;
  66 }
  67
  68 static phys_addr_t omap_dsp_get_mempool_base(void)
  69 {
  70         return omap_dsp_phys_mempool_base;
  71 }
  72
  73 static int __init omap_dsp_init(void)
  74 {
  75         struct platform_device *pdev;
  76         int err = -ENOMEM;
  77         struct omap_dsp_platform_data *pdata = &omap_dsp_pdata;
  78
  79         pdata->phys_mempool_base = omap_dsp_get_mempool_base();
  80
  81         if (pdata->phys_mempool_base) {
  82                 pdata->phys_mempool_size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  83                 pr_info("%s: %llx bytes @ %llx\n", __func__,
  84                         (unsigned long long)pdata->phys_mempool_size,
  85                         (unsigned long long)pdata->phys_mempool_base);
  86         }
  87
  88         pdev = platform_device_alloc("omap-dsp", -1);
  89         if (!pdev)
  90                 goto err_out;
  91
  92         err = platform_device_add_data(pdev, pdata, sizeof(*pdata));
  93         if (err)
  94                 goto err_out;
  95
  96         err = platform_device_add(pdev);
  97         if (err)
  98                 goto err_out;
  99
 100         omap_dsp_pdev = pdev;
 101         return 0;
 102
 103 err_out:
 104         platform_device_put(pdev);
 105         return err;
 106 }
 107 module_init(omap_dsp_init);
 108
 109 static void __exit omap_dsp_exit(void)
 110 {
 111         platform_device_unregister(omap_dsp_pdev);
 112 }
 113 module_exit(omap_dsp_exit);
 114
 115 MODULE_AUTHOR("Hiroshi DOYU");
 116 MODULE_DESCRIPTION("TI's OMAP DSP platform device registration");
 117 MODULE_LICENSE("GPL");