arch/powerpc/sysdev/fsl_soc.c

   1 /*
   2  * FSL SoC setup code
   3  *
   4  * Maintained by Kumar Gala (see MAINTAINERS for contact information)
   5  *
   6  * 2006 (c) MontaVista Software, Inc.
   7  * Vitaly Bordug <vbordug@ru.mvista.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <linux/stddef.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/major.h>
  20 #include <linux/delay.h>
  21 #include <linux/irq.h>
  22 #include <linux/export.h>
  23 #include <linux/device.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/of.h>
  26 #include <linux/of_platform.h>
  27 #include <linux/phy.h>
  28 #include <linux/phy_fixed.h>
  29 #include <linux/spi/spi.h>
  30 #include <linux/fsl_devices.h>
  31 #include <linux/fs_enet_pd.h>
  32 #include <linux/fs_uart_pd.h>
  33
  34 #include <linux/atomic.h>
  35 #include <asm/io.h>
  36 #include <asm/irq.h>
  37 #include <asm/time.h>
  38 #include <asm/prom.h>
  39 #include <asm/machdep.h>
  40 #include <sysdev/fsl_soc.h>
  41 #include <mm/mmu_decl.h>
  42 #include <asm/cpm2.h>
  43 #include <asm/fsl_hcalls.h>     /* For the Freescale hypervisor */
  44
  45 extern void init_fcc_ioports(struct fs_platform_info*);
  46 extern void init_fec_ioports(struct fs_platform_info*);
  47 extern void init_smc_ioports(struct fs_uart_platform_info*);
  48 static phys_addr_t immrbase = -1;
  49
  50 phys_addr_t get_immrbase(void)
  51 {
  52         struct device_node *soc;
  53
  54         if (immrbase != -1)
  55                 return immrbase;
  56
  57         soc = of_find_node_by_type(NULL, "soc");
  58         if (soc) {
  59                 int size;
  60                 u32 naddr;
  61                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
  62
  63                 if (prop && size == 4)
  64                         naddr = *prop;
  65                 else
  66                         naddr = 2;
  67
  68                 prop = of_get_property(soc, "ranges", &size);
  69                 if (prop)
  70                         immrbase = of_translate_address(soc, prop + naddr);
  71
  72                 of_node_put(soc);
  73         }
  74
  75         return immrbase;
  76 }
  77
  78 EXPORT_SYMBOL(get_immrbase);
  79
  80 static u32 sysfreq = -1;
  81
  82 u32 fsl_get_sys_freq(void)
  83 {
  84         struct device_node *soc;
  85         const u32 *prop;
  86         int size;
  87
  88         if (sysfreq != -1)
  89                 return sysfreq;
  90
  91         soc = of_find_node_by_type(NULL, "soc");
  92         if (!soc)
  93                 return -1;
  94
  95         prop = of_get_property(soc, "clock-frequency", &size);
  96         if (!prop || size != sizeof(*prop) || *prop == 0)
  97                 prop = of_get_property(soc, "bus-frequency", &size);
  98
  99         if (prop && size == sizeof(*prop))
 100                 sysfreq = *prop;
 101
 102         of_node_put(soc);
 103         return sysfreq;
 104 }
 105 EXPORT_SYMBOL(fsl_get_sys_freq);
 106
 107 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 108
 109 static u32 brgfreq = -1;
 110
 111 u32 get_brgfreq(void)
 112 {
 113         struct device_node *node;
 114         const unsigned int *prop;
 115         int size;
 116
 117         if (brgfreq != -1)
 118                 return brgfreq;
 119
 120         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 121         if (node) {
 122                 prop = of_get_property(node, "clock-frequency", &size);
 123                 if (prop && size == 4)
 124                         brgfreq = *prop;
 125
 126                 of_node_put(node);
 127                 return brgfreq;
 128         }
 129
 130         /* Legacy device binding -- will go away when no users are left. */
 131         node = of_find_node_by_type(NULL, "cpm");
 132         if (!node)
 133                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 134         if (!node)
 135                 node = of_find_node_by_type(NULL, "qe");
 136
 137         if (node) {
 138                 prop = of_get_property(node, "brg-frequency", &size);
 139                 if (prop && size == 4)
 140                         brgfreq = *prop;
 141
 142                 if (brgfreq == -1 || brgfreq == 0) {
 143                         prop = of_get_property(node, "bus-frequency", &size);
 144                         if (prop && size == 4)
 145                                 brgfreq = *prop / 2;
 146                 }
 147                 of_node_put(node);
 148         }
 149
 150         return brgfreq;
 151 }
 152
 153 EXPORT_SYMBOL(get_brgfreq);
 154
 155 static u32 fs_baudrate = -1;
 156
 157 u32 get_baudrate(void)
 158 {
 159         struct device_node *node;
 160
 161         if (fs_baudrate != -1)
 162                 return fs_baudrate;
 163
 164         node = of_find_node_by_type(NULL, "serial");
 165         if (node) {
 166                 int size;
 167                 const unsigned int *prop = of_get_property(node,
 168                                 "current-speed", &size);
 169
 170                 if (prop)
 171                         fs_baudrate = *prop;
 172                 of_node_put(node);
 173         }
 174
 175         return fs_baudrate;
 176 }
 177
 178 EXPORT_SYMBOL(get_baudrate);
 179 #endif /* CONFIG_CPM2 */
 180
 181 #ifdef CONFIG_FIXED_PHY
 182 static int __init of_add_fixed_phys(void)
 183 {
 184         int ret;
 185         struct device_node *np;
 186         u32 *fixed_link;
 187         struct fixed_phy_status status = {};
 188
 189         for_each_node_by_name(np, "ethernet") {
 190                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 191                 if (!fixed_link)
 192                         continue;
 193
 194                 status.link = 1;
 195                 status.duplex = fixed_link[1];
 196                 status.speed = fixed_link[2];
 197                 status.pause = fixed_link[3];
 198                 status.asym_pause = fixed_link[4];
 199
 200                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 201                 if (ret) {
 202                         of_node_put(np);
 203                         return ret;
 204                 }
 205         }
 206
 207         return 0;
 208 }
 209 arch_initcall(of_add_fixed_phys);
 210 #endif /* CONFIG_FIXED_PHY */
 211
 212 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
 213 static __be32 __iomem *rstcr;
 214
 215 static int __init setup_rstcr(void)
 216 {
 217         struct device_node *np;
 218
 219         for_each_node_by_name(np, "global-utilities") {
 220                 if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
 221                         rstcr = of_iomap(np, 0) + 0xb0;
 222                         if (!rstcr)
 223                                 printk (KERN_ERR "Error: reset control "
 224                                                 "register not mapped!\n");
 225                         break;
 226                 }
 227         }
 228
 229         if (!rstcr && ppc_md.restart == fsl_rstcr_restart)
 230                 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
 231
 232         if (np)
 233                 of_node_put(np);
 234
 235         return 0;
 236 }
 237
 238 arch_initcall(setup_rstcr);
 239
 240 void fsl_rstcr_restart(char *cmd)
 241 {
 242         local_irq_disable();
 243         if (rstcr)
 244                 /* set reset control register */
 245                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
 246
 247         while (1) ;
 248 }
 249 #endif
 250
 251 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 252 struct platform_diu_data_ops diu_ops;
 253 EXPORT_SYMBOL(diu_ops);
 254 #endif
 255
 256 #ifdef CONFIG_EPAPR_PARAVIRT
 257 /*
 258  * Restart the current partition
 259  *
 260  * This function should be assigned to the ppc_md.restart function pointer,
 261  * to initiate a partition restart when we're running under the Freescale
 262  * hypervisor.
 263  */
 264 void fsl_hv_restart(char *cmd)
 265 {
 266         pr_info("hv restart\n");
 267         fh_partition_restart(-1);
 268 }
 269
 270 /*
 271  * Halt the current partition
 272  *
 273  * This function should be assigned to the ppc_md.power_off and ppc_md.halt
 274  * function pointers, to shut down the partition when we're running under
 275  * the Freescale hypervisor.
 276  */
 277 void fsl_hv_halt(void)
 278 {
 279         pr_info("hv exit\n");
 280         fh_partition_stop(-1);
 281 }
 282 #endif