arch/arm/mach-omap2/devices.c

   1 /*
   2  * linux/arch/arm/mach-omap2/devices.c
   3  *
   4  * OMAP2 platform device setup/initialization
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11 #include <linux/gpio.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/io.h>
  16 #include <linux/clk.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/of.h>
  20 #include <linux/pinctrl/machine.h>
  21 #include <linux/platform_data/mailbox-omap.h>
  22
  23 #include <asm/mach-types.h>
  24 #include <asm/mach/map.h>
  25
  26 #include <linux/omap-dma.h>
  27
  28 #include "iomap.h"
  29 #include "omap_hwmod.h"
  30 #include "omap_device.h"
  31
  32 #include "soc.h"
  33 #include "common.h"
  34 #include "mux.h"
  35 #include "control.h"
  36 #include "display.h"
  37
  38 #define L3_MODULES_MAX_LEN 12
  39 #define L3_MODULES 3
  40
  41 static int __init omap3_l3_init(void)
  42 {
  43         struct omap_hwmod *oh;
  44         struct platform_device *pdev;
  45         char oh_name[L3_MODULES_MAX_LEN];
  46
  47         /*
  48          * To avoid code running on other OMAPs in
  49          * multi-omap builds
  50          */
  51         if (!(cpu_is_omap34xx()) || of_have_populated_dt())
  52                 return -ENODEV;
  53
  54         snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main");
  55
  56         oh = omap_hwmod_lookup(oh_name);
  57
  58         if (!oh)
  59                 pr_err("could not look up %s\n", oh_name);
  60
  61         pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0);
  62
  63         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
  64
  65         return PTR_ERR_OR_ZERO(pdev);
  66 }
  67 omap_postcore_initcall(omap3_l3_init);
  68
  69 #if defined(CONFIG_OMAP2PLUS_MBOX) || defined(CONFIG_OMAP2PLUS_MBOX_MODULE)
  70 static inline void __init omap_init_mbox(void)
  71 {
  72         struct omap_hwmod *oh;
  73         struct platform_device *pdev;
  74         struct omap_mbox_pdata *pdata;
  75
  76         oh = omap_hwmod_lookup("mailbox");
  77         if (!oh) {
  78                 pr_err("%s: unable to find hwmod\n", __func__);
  79                 return;
  80         }
  81         if (!oh->dev_attr) {
  82                 pr_err("%s: hwmod doesn't have valid attrs\n", __func__);
  83                 return;
  84         }
  85
  86         pdata = (struct omap_mbox_pdata *)oh->dev_attr;
  87         pdev = omap_device_build("omap-mailbox", -1, oh, pdata, sizeof(*pdata));
  88         WARN(IS_ERR(pdev), "%s: could not build device, err %ld\n",
  89                                                 __func__, PTR_ERR(pdev));
  90 }
  91 #else
  92 static inline void omap_init_mbox(void) { }
  93 #endif /* CONFIG_OMAP2PLUS_MBOX */
  94
  95 static inline void omap_init_sti(void) {}
  96
  97 #if defined(CONFIG_SPI_OMAP24XX) || defined(CONFIG_SPI_OMAP24XX_MODULE)
  98
  99 #include <linux/platform_data/spi-omap2-mcspi.h>
 100
 101 static int __init omap_mcspi_init(struct omap_hwmod *oh, void *unused)
 102 {
 103         struct platform_device *pdev;
 104         char *name = "omap2_mcspi";
 105         struct omap2_mcspi_platform_config *pdata;
 106         static int spi_num;
 107         struct omap2_mcspi_dev_attr *mcspi_attrib = oh->dev_attr;
 108
 109         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
 110         if (!pdata) {
 111                 pr_err("Memory allocation for McSPI device failed\n");
 112                 return -ENOMEM;
 113         }
 114
 115         pdata->num_cs = mcspi_attrib->num_chipselect;
 116         switch (oh->class->rev) {
 117         case OMAP2_MCSPI_REV:
 118         case OMAP3_MCSPI_REV:
 119                         pdata->regs_offset = 0;
 120                         break;
 121         case OMAP4_MCSPI_REV:
 122                         pdata->regs_offset = OMAP4_MCSPI_REG_OFFSET;
 123                         break;
 124         default:
 125                         pr_err("Invalid McSPI Revision value\n");
 126                         kfree(pdata);
 127                         return -EINVAL;
 128         }
 129
 130         spi_num++;
 131         pdev = omap_device_build(name, spi_num, oh, pdata, sizeof(*pdata));
 132         WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s\n",
 133                                 name, oh->name);
 134         kfree(pdata);
 135         return 0;
 136 }
 137
 138 static void omap_init_mcspi(void)
 139 {
 140         omap_hwmod_for_each_by_class("mcspi", omap_mcspi_init, NULL);
 141 }
 142
 143 #else
 144 static inline void omap_init_mcspi(void) {}
 145 #endif
 146
 147 /**
 148  * omap_init_rng - bind the RNG hwmod to the RNG omap_device
 149  *
 150  * Bind the RNG hwmod to the RNG omap_device.  No return value.
 151  */
 152 static void omap_init_rng(void)
 153 {
 154         struct omap_hwmod *oh;
 155         struct platform_device *pdev;
 156
 157         oh = omap_hwmod_lookup("rng");
 158         if (!oh)
 159                 return;
 160
 161         pdev = omap_device_build("omap_rng", -1, oh, NULL, 0);
 162         WARN(IS_ERR(pdev), "Can't build omap_device for omap_rng\n");
 163 }
 164
 165 static void __init omap_init_sham(void)
 166 {
 167         struct omap_hwmod *oh;
 168         struct platform_device *pdev;
 169
 170         oh = omap_hwmod_lookup("sham");
 171         if (!oh)
 172                 return;
 173
 174         pdev = omap_device_build("omap-sham", -1, oh, NULL, 0);
 175         WARN(IS_ERR(pdev), "Can't build omap_device for omap-sham\n");
 176 }
 177
 178 static void __init omap_init_aes(void)
 179 {
 180         struct omap_hwmod *oh;
 181         struct platform_device *pdev;
 182
 183         oh = omap_hwmod_lookup("aes");
 184         if (!oh)
 185                 return;
 186
 187         pdev = omap_device_build("omap-aes", -1, oh, NULL, 0);
 188         WARN(IS_ERR(pdev), "Can't build omap_device for omap-aes\n");
 189 }
 190
 191 /*-------------------------------------------------------------------------*/
 192
 193 #if defined(CONFIG_VIDEO_OMAP2_VOUT) || \
 194         defined(CONFIG_VIDEO_OMAP2_VOUT_MODULE)
 195 #if defined(CONFIG_FB_OMAP2) || defined(CONFIG_FB_OMAP2_MODULE)
 196 static struct resource omap_vout_resource[3 - CONFIG_FB_OMAP2_NUM_FBS] = {
 197 };
 198 #else
 199 static struct resource omap_vout_resource[2] = {
 200 };
 201 #endif
 202
 203 static struct platform_device omap_vout_device = {
 204         .name           = "omap_vout",
 205         .num_resources  = ARRAY_SIZE(omap_vout_resource),
 206         .resource       = &omap_vout_resource[0],
 207         .id             = -1,
 208 };
 209
 210 int __init omap_init_vout(void)
 211 {
 212         return platform_device_register(&omap_vout_device);
 213 }
 214 #else
 215 int __init omap_init_vout(void) { return 0; }
 216 #endif
 217
 218 /*-------------------------------------------------------------------------*/
 219
 220 static int __init omap2_init_devices(void)
 221 {
 222         /* Enable dummy states for those platforms without pinctrl support */
 223         if (!of_have_populated_dt())
 224                 pinctrl_provide_dummies();
 225
 226         /* If dtb is there, the devices will be created dynamically */
 227         if (!of_have_populated_dt()) {
 228                 /*
 229                  * please keep these calls, and their implementations above,
 230                  * in alphabetical order so they're easier to sort through.
 231                  */
 232                 omap_init_mbox();
 233                 omap_init_mcspi();
 234                 omap_init_sham();
 235                 omap_init_aes();
 236                 omap_init_rng();
 237         }
 238         omap_init_sti();
 239
 240         return 0;
 241 }
 242 omap_arch_initcall(omap2_init_devices);
 243
 244 static int __init omap_gpmc_init(void)
 245 {
 246         struct omap_hwmod *oh;
 247         struct platform_device *pdev;
 248         char *oh_name = "gpmc";
 249
 250         /*
 251          * if the board boots up with a populated DT, do not
 252          * manually add the device from this initcall
 253          */
 254         if (of_have_populated_dt())
 255                 return -ENODEV;
 256
 257         oh = omap_hwmod_lookup(oh_name);
 258         if (!oh) {
 259                 pr_err("Could not look up %s\n", oh_name);
 260                 return -ENODEV;
 261         }
 262
 263         pdev = omap_device_build("omap-gpmc", -1, oh, NULL, 0);
 264         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
 265
 266         return PTR_ERR_OR_ZERO(pdev);
 267 }
 268 omap_postcore_initcall(omap_gpmc_init);