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 "control.h"
  27 #include "cm2xxx_3xxx.h"
  28 #include "prm2xxx_3xxx.h"
  29 #ifdef CONFIG_TIDSPBRIDGE_DVFS
  30 #include "omap-pm.h"
  31 #endif
  32
  33 #include <linux/platform_data/dsp-omap.h>
  34
  35 static struct platform_device *omap_dsp_pdev;
  36
  37 static struct omap_dsp_platform_data omap_dsp_pdata __initdata = {
  38 #ifdef CONFIG_TIDSPBRIDGE_DVFS
  39         .dsp_set_min_opp = omap_pm_dsp_set_min_opp,
  40         .dsp_get_opp = omap_pm_dsp_get_opp,
  41         .cpu_set_freq = omap_pm_cpu_set_freq,
  42         .cpu_get_freq = omap_pm_cpu_get_freq,
  43 #endif
  44         .dsp_prm_read = omap2_prm_read_mod_reg,
  45         .dsp_prm_write = omap2_prm_write_mod_reg,
  46         .dsp_prm_rmw_bits = omap2_prm_rmw_mod_reg_bits,
  47         .dsp_cm_read = omap2_cm_read_mod_reg,
  48         .dsp_cm_write = omap2_cm_write_mod_reg,
  49         .dsp_cm_rmw_bits = omap2_cm_rmw_mod_reg_bits,
  50
  51         .set_bootaddr = omap_ctrl_write_dsp_boot_addr,
  52         .set_bootmode = omap_ctrl_write_dsp_boot_mode,
  53 };
  54
  55 static phys_addr_t omap_dsp_phys_mempool_base;
  56
  57 void __init omap_dsp_reserve_sdram_memblock(void)
  58 {
  59         phys_addr_t size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  60         phys_addr_t paddr;
  61
  62         if (!size)
  63                 return;
  64
  65         paddr = arm_memblock_steal(size, SZ_1M);
  66         if (!paddr) {
  67                 pr_err("%s: failed to reserve %llx bytes\n",
  68                                 __func__, (unsigned long long)size);
  69                 return;
  70         }
  71
  72         omap_dsp_phys_mempool_base = paddr;
  73 }
  74
  75 static phys_addr_t omap_dsp_get_mempool_base(void)
  76 {
  77         return omap_dsp_phys_mempool_base;
  78 }
  79
  80 static int __init omap_dsp_init(void)
  81 {
  82         struct platform_device *pdev;
  83         int err = -ENOMEM;
  84         struct omap_dsp_platform_data *pdata = &omap_dsp_pdata;
  85
  86         pdata->phys_mempool_base = omap_dsp_get_mempool_base();
  87
  88         if (pdata->phys_mempool_base) {
  89                 pdata->phys_mempool_size = CONFIG_TIDSPBRIDGE_MEMPOOL_SIZE;
  90                 pr_info("%s: %llx bytes @ %llx\n", __func__,
  91                         (unsigned long long)pdata->phys_mempool_size,
  92                         (unsigned long long)pdata->phys_mempool_base);
  93         }
  94
  95         pdev = platform_device_alloc("omap-dsp", -1);
  96         if (!pdev)
  97                 goto err_out;
  98
  99         err = platform_device_add_data(pdev, pdata, sizeof(*pdata));
 100         if (err)
 101                 goto err_out;
 102
 103         err = platform_device_add(pdev);
 104         if (err)
 105                 goto err_out;
 106
 107         omap_dsp_pdev = pdev;
 108         return 0;
 109
 110 err_out:
 111         platform_device_put(pdev);
 112         return err;
 113 }
 114 module_init(omap_dsp_init);
 115
 116 static void __exit omap_dsp_exit(void)
 117 {
 118         platform_device_unregister(omap_dsp_pdev);
 119 }
 120 module_exit(omap_dsp_exit);
 121
 122 MODULE_AUTHOR("Hiroshi DOYU");
 123 MODULE_DESCRIPTION("TI's OMAP DSP platform device registration");
 124 MODULE_LICENSE("GPL");