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 <asm/system.h>
  35 #include <linux/atomic.h>
  36 #include <asm/io.h>
  37 #include <asm/irq.h>
  38 #include <asm/time.h>
  39 #include <asm/prom.h>
  40 #include <asm/machdep.h>
  41 #include <sysdev/fsl_soc.h>
  42 #include <mm/mmu_decl.h>
  43 #include <asm/cpm2.h>
  44 #include <asm/fsl_hcalls.h>     /* For the Freescale hypervisor */
  45
  46 extern void init_fcc_ioports(struct fs_platform_info*);
  47 extern void init_fec_ioports(struct fs_platform_info*);
  48 extern void init_smc_ioports(struct fs_uart_platform_info*);
  49 static phys_addr_t immrbase = -1;
  50
  51 phys_addr_t get_immrbase(void)
  52 {
  53         struct device_node *soc;
  54
  55         if (immrbase != -1)
  56                 return immrbase;
  57
  58         soc = of_find_node_by_type(NULL, "soc");
  59         if (soc) {
  60                 int size;
  61                 u32 naddr;
  62                 const u32 *prop = of_get_property(soc, "#address-cells", &size);
  63
  64                 if (prop && size == 4)
  65                         naddr = *prop;
  66                 else
  67                         naddr = 2;
  68
  69                 prop = of_get_property(soc, "ranges", &size);
  70                 if (prop)
  71                         immrbase = of_translate_address(soc, prop + naddr);
  72
  73                 of_node_put(soc);
  74         }
  75
  76         return immrbase;
  77 }
  78
  79 EXPORT_SYMBOL(get_immrbase);
  80
  81 static u32 sysfreq = -1;
  82
  83 u32 fsl_get_sys_freq(void)
  84 {
  85         struct device_node *soc;
  86         const u32 *prop;
  87         int size;
  88
  89         if (sysfreq != -1)
  90                 return sysfreq;
  91
  92         soc = of_find_node_by_type(NULL, "soc");
  93         if (!soc)
  94                 return -1;
  95
  96         prop = of_get_property(soc, "clock-frequency", &size);
  97         if (!prop || size != sizeof(*prop) || *prop == 0)
  98                 prop = of_get_property(soc, "bus-frequency", &size);
  99
 100         if (prop && size == sizeof(*prop))
 101                 sysfreq = *prop;
 102
 103         of_node_put(soc);
 104         return sysfreq;
 105 }
 106 EXPORT_SYMBOL(fsl_get_sys_freq);
 107
 108 #if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
 109
 110 static u32 brgfreq = -1;
 111
 112 u32 get_brgfreq(void)
 113 {
 114         struct device_node *node;
 115         const unsigned int *prop;
 116         int size;
 117
 118         if (brgfreq != -1)
 119                 return brgfreq;
 120
 121         node = of_find_compatible_node(NULL, NULL, "fsl,cpm-brg");
 122         if (node) {
 123                 prop = of_get_property(node, "clock-frequency", &size);
 124                 if (prop && size == 4)
 125                         brgfreq = *prop;
 126
 127                 of_node_put(node);
 128                 return brgfreq;
 129         }
 130
 131         /* Legacy device binding -- will go away when no users are left. */
 132         node = of_find_node_by_type(NULL, "cpm");
 133         if (!node)
 134                 node = of_find_compatible_node(NULL, NULL, "fsl,qe");
 135         if (!node)
 136                 node = of_find_node_by_type(NULL, "qe");
 137
 138         if (node) {
 139                 prop = of_get_property(node, "brg-frequency", &size);
 140                 if (prop && size == 4)
 141                         brgfreq = *prop;
 142
 143                 if (brgfreq == -1 || brgfreq == 0) {
 144                         prop = of_get_property(node, "bus-frequency", &size);
 145                         if (prop && size == 4)
 146                                 brgfreq = *prop / 2;
 147                 }
 148                 of_node_put(node);
 149         }
 150
 151         return brgfreq;
 152 }
 153
 154 EXPORT_SYMBOL(get_brgfreq);
 155
 156 static u32 fs_baudrate = -1;
 157
 158 u32 get_baudrate(void)
 159 {
 160         struct device_node *node;
 161
 162         if (fs_baudrate != -1)
 163                 return fs_baudrate;
 164
 165         node = of_find_node_by_type(NULL, "serial");
 166         if (node) {
 167                 int size;
 168                 const unsigned int *prop = of_get_property(node,
 169                                 "current-speed", &size);
 170
 171                 if (prop)
 172                         fs_baudrate = *prop;
 173                 of_node_put(node);
 174         }
 175
 176         return fs_baudrate;
 177 }
 178
 179 EXPORT_SYMBOL(get_baudrate);
 180 #endif /* CONFIG_CPM2 */
 181
 182 #ifdef CONFIG_FIXED_PHY
 183 static int __init of_add_fixed_phys(void)
 184 {
 185         int ret;
 186         struct device_node *np;
 187         u32 *fixed_link;
 188         struct fixed_phy_status status = {};
 189
 190         for_each_node_by_name(np, "ethernet") {
 191                 fixed_link  = (u32 *)of_get_property(np, "fixed-link", NULL);
 192                 if (!fixed_link)
 193                         continue;
 194
 195                 status.link = 1;
 196                 status.duplex = fixed_link[1];
 197                 status.speed = fixed_link[2];
 198                 status.pause = fixed_link[3];
 199                 status.asym_pause = fixed_link[4];
 200
 201                 ret = fixed_phy_add(PHY_POLL, fixed_link[0], &status);
 202                 if (ret) {
 203                         of_node_put(np);
 204                         return ret;
 205                 }
 206         }
 207
 208         return 0;
 209 }
 210 arch_initcall(of_add_fixed_phys);
 211 #endif /* CONFIG_FIXED_PHY */
 212
 213 #if defined(CONFIG_FSL_SOC_BOOKE) || defined(CONFIG_PPC_86xx)
 214 static __be32 __iomem *rstcr;
 215
 216 static int __init setup_rstcr(void)
 217 {
 218         struct device_node *np;
 219
 220         for_each_node_by_name(np, "global-utilities") {
 221                 if ((of_get_property(np, "fsl,has-rstcr", NULL))) {
 222                         rstcr = of_iomap(np, 0) + 0xb0;
 223                         if (!rstcr)
 224                                 printk (KERN_ERR "Error: reset control "
 225                                                 "register not mapped!\n");
 226                         break;
 227                 }
 228         }
 229
 230         if (!rstcr && ppc_md.restart == fsl_rstcr_restart)
 231                 printk(KERN_ERR "No RSTCR register, warm reboot won't work\n");
 232
 233         if (np)
 234                 of_node_put(np);
 235
 236         return 0;
 237 }
 238
 239 arch_initcall(setup_rstcr);
 240
 241 void fsl_rstcr_restart(char *cmd)
 242 {
 243         local_irq_disable();
 244         if (rstcr)
 245                 /* set reset control register */
 246                 out_be32(rstcr, 0x2);   /* HRESET_REQ */
 247
 248         while (1) ;
 249 }
 250 #endif
 251
 252 #if defined(CONFIG_FB_FSL_DIU) || defined(CONFIG_FB_FSL_DIU_MODULE)
 253 struct platform_diu_data_ops diu_ops;
 254 EXPORT_SYMBOL(diu_ops);
 255 #endif
 256
 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 }