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
  24 #include <asm/memblock.h>
  25
  26 #include "cm2xxx_3xxx.h"
  27 #include "prm2xxx_3xxx.h"
  28 #ifdef CONFIG_BRIDGE_DVFS
  29 #include <plat/omap-pm.h>
  30 #endif
  31
  32 #include <plat/dsp.h>
  33
  34 static struct platform_device *omap_dsp_pdev;
  35
  36 static struct omap_dsp_platform_data omap_dsp_pdata __initdata = {
  37 #ifdef CONFIG_BRIDGE_DVFS
  38         .dsp_set_min_opp = omap_pm_dsp_set_min_opp,
  39         .dsp_get_opp = omap_pm_dsp_get_opp,
  40         .cpu_set_freq = omap_pm_cpu_set_freq,
  41         .cpu_get_freq = omap_pm_cpu_get_freq,
  42 #endif
  43         .dsp_prm_read = omap2_prm_read_mod_reg,
  44         .dsp_prm_write = omap2_prm_write_mod_reg,
  45         .dsp_prm_rmw_bits = omap2_prm_rmw_mod_reg_bits,
  46         .dsp_cm_read = omap2_cm_read_mod_reg,
  47         .dsp_cm_write = omap2_cm_write_mod_reg,
  48         .dsp_cm_rmw_bits = omap2_cm_rmw_mod_reg_bits,
  49 };
  50
  51 static phys_addr_t omap_dsp_phys_mempool_base;
  52
  53 void __init omap_dsp_reserve_sdram_memblock(void)
  54 {
  55         phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  56         phys_addr_t paddr;
  57
  58         if (!size)
  59                 return;
  60
  61         paddr = arm_memblock_steal(size, SZ_1M);
  62         if (!paddr) {
  63                 pr_err("%s: failed to reserve %llx bytes\n",
  64                                 __func__, (unsigned long long)size);
  65                 return;
  66         }
  67
  68         omap_dsp_phys_mempool_base = paddr;
  69 }
  70
  71 static phys_addr_t omap_dsp_get_mempool_base(void)
  72 {
  73         return omap_dsp_phys_mempool_base;
  74 }
  75
  76 static int __init omap_dsp_init(void)
  77 {
  78         struct platform_device *pdev;
  79         int err = -ENOMEM;
  80         struct omap_dsp_platform_data *pdata = &omap_dsp_pdata;
  81
  82         pdata->phys_mempool_base = omap_dsp_get_mempool_base();
  83
  84         if (pdata->phys_mempool_base) {
  85                 pdata->phys_mempool_size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  86                 pr_info("%s: %llx bytes @ %llx\n", __func__,
  87                         (unsigned long long)pdata->phys_mempool_size,
  88                         (unsigned long long)pdata->phys_mempool_base);
  89         }
  90
  91         pdev = platform_device_alloc("omap-dsp", -1);
  92         if (!pdev)
  93                 goto err_out;
  94
  95         err = platform_device_add_data(pdev, pdata, sizeof(*pdata));
  96         if (err)
  97                 goto err_out;
  98
  99         err = platform_device_add(pdev);
 100         if (err)
 101                 goto err_out;
 102
 103         omap_dsp_pdev = pdev;
 104         return 0;
 105
 106 err_out:
 107         platform_device_put(pdev);
 108         return err;
 109 }
 110 module_init(omap_dsp_init);
 111
 112 static void __exit omap_dsp_exit(void)
 113 {
 114         platform_device_unregister(omap_dsp_pdev);
 115 }
 116 module_exit(omap_dsp_exit);
 117
 118 MODULE_AUTHOR("Hiroshi DOYU");
 119 MODULE_DESCRIPTION("TI's OMAP DSP platform device registration");
 120 MODULE_LICENSE("GPL");