arch/mips/pmc-sierra/msp71xx/msp_setup.c

   1 /*
   2  * The generic setup file for PMC-Sierra MSP processors
   3  *
   4  * Copyright 2005-2007 PMC-Sierra, Inc,
   5  * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <asm/bootinfo.h>
  14 #include <asm/cacheflush.h>
  15 #include <asm/r4kcache.h>
  16 #include <asm/reboot.h>
  17 #include <asm/time.h>
  18
  19 #include <msp_prom.h>
  20 #include <msp_regs.h>
  21
  22 #if defined(CONFIG_PMC_MSP7120_GW)
  23 #include <msp_regops.h>
  24 #define MSP_BOARD_RESET_GPIO    9
  25 #endif
  26
  27 extern void msp_serial_setup(void);
  28 extern void pmctwiled_setup(void);
  29
  30 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
  31     defined(CONFIG_PMC_MSP7120_GW) || \
  32     defined(CONFIG_PMC_MSP7120_FPGA)
  33 /*
  34  * Performs the reset for MSP7120-based boards
  35  */
  36 void msp7120_reset(void)
  37 {
  38         void *start, *end, *iptr;
  39         register int i;
  40
  41         /* Diasble all interrupts */
  42         local_irq_disable();
  43 #ifdef CONFIG_SYS_SUPPORTS_MULTITHREADING
  44         dvpe();
  45 #endif
  46
  47         /* Cache the reset code of this function */
  48         __asm__ __volatile__ (
  49                 "       .set    push                            \n"
  50                 "       .set    mips3                           \n"
  51                 "       la      %0,startpoint                   \n"
  52                 "       la      %1,endpoint                     \n"
  53                 "       .set    pop                             \n"
  54                 : "=r" (start), "=r" (end)
  55                 :
  56         );
  57
  58         for (iptr = (void *)((unsigned int)start & ~(L1_CACHE_BYTES - 1));
  59              iptr < end; iptr += L1_CACHE_BYTES)
  60                 cache_op(Fill, iptr);
  61
  62         __asm__ __volatile__ (
  63                 "startpoint:                                    \n"
  64         );
  65
  66         /* Put the DDRC into self-refresh mode */
  67         DDRC_INDIRECT_WRITE(DDRC_CTL(10), 0xb, 1 << 16);
  68
  69         /*
  70          * IMPORTANT!
  71          * DO NOT do anything from here on out that might even
  72          * think about fetching from RAM - i.e., don't call any
  73          * non-inlined functions, and be VERY sure that any inline
  74          * functions you do call do NOT access any sort of RAM
  75          * anywhere!
  76          */
  77
  78         /* Wait a bit for the DDRC to settle */
  79         for (i = 0; i < 100000000; i++);
  80
  81 #if defined(CONFIG_PMC_MSP7120_GW)
  82         /*
  83          * Set GPIO 9 HI, (tied to board reset logic)
  84          * GPIO 9 is the 4th GPIO of register 3
  85          *
  86          * NOTE: We cannot use the higher-level msp_gpio_mode()/out()
  87          * as GPIO char driver may not be enabled and it would look up
  88          * data inRAM!
  89          */
  90         set_value_reg32(GPIO_CFG3_REG, 0xf000, 0x8000);
  91         set_reg32(GPIO_DATA3_REG, 8);
  92
  93         /*
  94          * In case GPIO9 doesn't reset the board (jumper configurable!)
  95          * fallback to device reset below.
  96          */
  97 #endif
  98         /* Set bit 1 of the MSP7120 reset register */
  99         *RST_SET_REG = 0x00000001;
 100
 101         __asm__ __volatile__ (
 102                 "endpoint:                                      \n"
 103         );
 104 }
 105 #endif
 106
 107 void msp_restart(char *command)
 108 {
 109         printk(KERN_WARNING "Now rebooting .......\n");
 110
 111 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
 112     defined(CONFIG_PMC_MSP7120_GW) || \
 113     defined(CONFIG_PMC_MSP7120_FPGA)
 114         msp7120_reset();
 115 #else
 116         /* No chip-specific reset code, just jump to the ROM reset vector */
 117         set_c0_status(ST0_BEV | ST0_ERL);
 118         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
 119         flush_cache_all();
 120         write_c0_wired(0);
 121
 122         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
 123 #endif
 124 }
 125
 126 void msp_halt(void)
 127 {
 128         printk(KERN_WARNING "\n** You can safely turn off the power\n");
 129         while (1)
 130                 /* If possible call official function to get CPU WARs */
 131                 if (cpu_wait)
 132                         (*cpu_wait)();
 133                 else
 134                         __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
 135 }
 136
 137 void msp_power_off(void)
 138 {
 139         msp_halt();
 140 }
 141
 142 void __init plat_mem_setup(void)
 143 {
 144         _machine_restart = msp_restart;
 145         _machine_halt = msp_halt;
 146         pm_power_off = msp_power_off;
 147 }
 148
 149 void __init prom_init(void)
 150 {
 151         unsigned long family;
 152         unsigned long revision;
 153
 154         prom_argc = fw_arg0;
 155         prom_argv = (char **)fw_arg1;
 156         prom_envp = (char **)fw_arg2;
 157
 158         /*
 159          * Someday we can use this with PMON2000 to get a
 160          * platform call prom routines for output etc. without
 161          * having to use grody hacks.  For now it's unused.
 162          *
 163          * struct callvectors *cv = (struct callvectors *) fw_arg3;
 164          */
 165         family = identify_family();
 166         revision = identify_revision();
 167
 168         switch (family) {
 169         case FAMILY_FPGA:
 170                 if (FPGA_IS_MSP4200(revision)) {
 171                         /* Old-style revision ID */
 172                         mips_machtype = MACH_MSP4200_FPGA;
 173                 } else {
 174                         mips_machtype = MACH_MSP_OTHER;
 175                 }
 176                 break;
 177
 178         case FAMILY_MSP4200:
 179 #if defined(CONFIG_PMC_MSP4200_EVAL)
 180                 mips_machtype  = MACH_MSP4200_EVAL;
 181 #elif defined(CONFIG_PMC_MSP4200_GW)
 182                 mips_machtype  = MACH_MSP4200_GW;
 183 #else
 184                 mips_machtype = MACH_MSP_OTHER;
 185 #endif
 186                 break;
 187
 188         case FAMILY_MSP4200_FPGA:
 189                 mips_machtype  = MACH_MSP4200_FPGA;
 190                 break;
 191
 192         case FAMILY_MSP7100:
 193 #if defined(CONFIG_PMC_MSP7120_EVAL)
 194                 mips_machtype = MACH_MSP7120_EVAL;
 195 #elif defined(CONFIG_PMC_MSP7120_GW)
 196                 mips_machtype = MACH_MSP7120_GW;
 197 #else
 198                 mips_machtype = MACH_MSP_OTHER;
 199 #endif
 200                 break;
 201
 202         case FAMILY_MSP7100_FPGA:
 203                 mips_machtype  = MACH_MSP7120_FPGA;
 204                 break;
 205
 206         default:
 207                 /* we don't recognize the machine */
 208                 mips_machtype  = MACH_UNKNOWN;
 209                 panic("***Bogosity factor five***, exiting\n");
 210                 break;
 211         }
 212
 213         prom_init_cmdline();
 214
 215         prom_meminit();
 216
 217         /*
 218          * Sub-system setup follows.
 219          * Setup functions can  either be called here or using the
 220          * subsys_initcall mechanism (i.e. see msp_pci_setup). The
 221          * order in which they are called can be changed by using the
 222          * link order in arch/mips/pmc-sierra/msp71xx/Makefile.
 223          *
 224          * NOTE: Please keep sub-system specific initialization code
 225          * in separate specific files.
 226          */
 227         msp_serial_setup();
 228
 229 #ifdef CONFIG_PMCTWILED
 230         /*
 231          * Setup LED states before the subsys_initcall loads other
 232          * dependant drivers/modules.
 233          */
 234         pmctwiled_setup();
 235 #endif
 236 }