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); 269