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 #include <msp_gpio.h>
  25 #define MSP_BOARD_RESET_GPIO    9
  26 #endif
  27
  28 extern void msp_serial_setup(void);
  29 extern void pmctwiled_setup(void);
  30
  31 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
  32     defined(CONFIG_PMC_MSP7120_GW) || \
  33     defined(CONFIG_PMC_MSP7120_FPGA)
  34 /*
  35  * Performs the reset for MSP7120-based boards
  36  */
  37 void msp7120_reset(void)
  38 {
  39         void *start, *end, *iptr;
  40         register int i;
  41
  42         /* Diasble all interrupts */
  43         local_irq_disable();
  44 #ifdef CONFIG_SYS_SUPPORTS_MULTITHREADING
  45         dvpe();
  46 #endif
  47
  48         /* Cache the reset code of this function */
  49         __asm__ __volatile__ (
  50                 "       .set    push                            \n"
  51                 "       .set    mips3                           \n"
  52                 "       la      %0,startpoint                   \n"
  53                 "       la      %1,endpoint                     \n"
  54                 "       .set    pop                             \n"
  55                 : "=r" (start), "=r" (end)
  56                 :
  57         );
  58
  59         for (iptr = (void *)((unsigned int)start & ~(L1_CACHE_BYTES - 1));
  60              iptr < end; iptr += L1_CACHE_BYTES)
  61                 cache_op(Fill, iptr);
  62
  63         __asm__ __volatile__ (
  64                 "startpoint:                                    \n"
  65         );
  66
  67         /* Put the DDRC into self-refresh mode */
  68         DDRC_INDIRECT_WRITE(DDRC_CTL(10), 0xb, 1 << 16);
  69
  70         /*
  71          * IMPORTANT!
  72          * DO NOT do anything from here on out that might even
  73          * think about fetching from RAM - i.e., don't call any
  74          * non-inlined functions, and be VERY sure that any inline
  75          * functions you do call do NOT access any sort of RAM
  76          * anywhere!
  77          */
  78
  79         /* Wait a bit for the DDRC to settle */
  80         for (i = 0; i < 100000000; i++);
  81
  82 #if defined(CONFIG_PMC_MSP7120_GW)
  83         /*
  84          * Set GPIO 9 HI, (tied to board reset logic)
  85          * GPIO 9 is the 4th GPIO of register 3
  86          *
  87          * NOTE: We cannot use the higher-level msp_gpio_mode()/out()
  88          * as GPIO char driver may not be enabled and it would look up
  89          * data inRAM!
  90          */
  91         set_value_reg32(GPIO_CFG3_REG,
  92                         basic_mode_mask(MSP_BOARD_RESET_GPIO),
  93                         basic_mode(MSP_GPIO_OUTPUT, MSP_BOARD_RESET_GPIO));
  94         set_reg32(GPIO_DATA3_REG,
  95                         basic_data_mask(MSP_BOARD_RESET_GPIO));
  96
  97         /*
  98          * In case GPIO9 doesn't reset the board (jumper configurable!)
  99          * fallback to device reset below.
 100          */
 101 #endif
 102         /* Set bit 1 of the MSP7120 reset register */
 103         *RST_SET_REG = 0x00000001;
 104
 105         __asm__ __volatile__ (
 106                 "endpoint:                                      \n"
 107         );
 108 }
 109 #endif
 110
 111 void msp_restart(char *command)
 112 {
 113         printk(KERN_WARNING "Now rebooting .......\n");
 114
 115 #if defined(CONFIG_PMC_MSP7120_EVAL) || \
 116     defined(CONFIG_PMC_MSP7120_GW) || \
 117     defined(CONFIG_PMC_MSP7120_FPGA)
 118         msp7120_reset();
 119 #else
 120         /* No chip-specific reset code, just jump to the ROM reset vector */
 121         set_c0_status(ST0_BEV | ST0_ERL);
 122         change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
 123         flush_cache_all();
 124         write_c0_wired(0);
 125
 126         __asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
 127 #endif
 128 }
 129
 130 void msp_halt(void)
 131 {
 132         printk(KERN_WARNING "\n** You can safely turn off the power\n");
 133         while (1)
 134                 /* If possible call official function to get CPU WARs */
 135                 if (cpu_wait)
 136                         (*cpu_wait)();
 137                 else
 138                         __asm__(".set\tmips3\n\t" "wait\n\t" ".set\tmips0");
 139 }
 140
 141 void msp_power_off(void)
 142 {
 143         msp_halt();
 144 }
 145
 146 void __init plat_mem_setup(void)
 147 {
 148         _machine_restart = msp_restart;
 149         _machine_halt = msp_halt;
 150         pm_power_off = msp_power_off;
 151 }
 152
 153 void __init prom_init(void)
 154 {
 155         unsigned long family;
 156         unsigned long revision;
 157
 158         prom_argc = fw_arg0;
 159         prom_argv = (char **)fw_arg1;
 160         prom_envp = (char **)fw_arg2;
 161
 162         /*
 163          * Someday we can use this with PMON2000 to get a
 164          * platform call prom routines for output etc. without
 165          * having to use grody hacks.  For now it's unused.
 166          *
 167          * struct callvectors *cv = (struct callvectors *) fw_arg3;
 168          */
 169         family = identify_family();
 170         revision = identify_revision();
 171
 172         switch (family) {
 173         case FAMILY_FPGA:
 174                 if (FPGA_IS_MSP4200(revision)) {
 175                         /* Old-style revision ID */
 176                         mips_machtype = MACH_MSP4200_FPGA;
 177                 } else {
 178                         mips_machtype = MACH_MSP_OTHER;
 179                 }
 180                 break;
 181
 182         case FAMILY_MSP4200:
 183 #if defined(CONFIG_PMC_MSP4200_EVAL)
 184                 mips_machtype  = MACH_MSP4200_EVAL;
 185 #elif defined(CONFIG_PMC_MSP4200_GW)
 186                 mips_machtype  = MACH_MSP4200_GW;
 187 #else
 188                 mips_machtype = MACH_MSP_OTHER;
 189 #endif
 190                 break;
 191
 192         case FAMILY_MSP4200_FPGA:
 193                 mips_machtype  = MACH_MSP4200_FPGA;
 194                 break;
 195
 196         case FAMILY_MSP7100:
 197 #if defined(CONFIG_PMC_MSP7120_EVAL)
 198                 mips_machtype = MACH_MSP7120_EVAL;
 199 #elif defined(CONFIG_PMC_MSP7120_GW)
 200                 mips_machtype = MACH_MSP7120_GW;
 201 #else
 202                 mips_machtype = MACH_MSP_OTHER;
 203 #endif
 204                 break;
 205
 206         case FAMILY_MSP7100_FPGA:
 207                 mips_machtype  = MACH_MSP7120_FPGA;
 208                 break;
 209
 210         default:
 211                 /* we don't recognize the machine */
 212                 mips_machtype  = MACH_UNKNOWN;
 213                 panic("***Bogosity factor five***, exiting\n");
 214                 break;
 215         }
 216
 217         prom_init_cmdline();
 218
 219         prom_meminit();
 220
 221         /*
 222          * Sub-system setup follows.
 223          * Setup functions can  either be called here or using the
 224          * subsys_initcall mechanism (i.e. see msp_pci_setup). The
 225          * order in which they are called can be changed by using the
 226          * link order in arch/mips/pmc-sierra/msp71xx/Makefile.
 227          *
 228          * NOTE: Please keep sub-system specific initialization code
 229          * in separate specific files.
 230          */
 231         msp_serial_setup();
 232
 233 #ifdef CONFIG_PMCTWILED
 234         /*
 235          * Setup LED states before the subsys_initcall loads other
 236          * dependant drivers/modules.
 237          */
 238         pmctwiled_setup();
 239 #endif
 240 }