arch/ppc/platforms/sbc82xx.c

   1 /*
   2  * arch/ppc/platforms/sbc82xx.c
   3  *
   4  * SBC82XX platform support
   5  *
   6  * Author: Guy Streeter <streeter@redhat.com>
   7  *
   8  * Derived from: est8260_setup.c by Allen Curtis, ONZ
   9  *
  10  * Copyright 2004 Red Hat, Inc.
  11  *
  12  * This program is free software; you can redistribute  it and/or modify it
  13  * under  the terms of  the GNU General  Public License as published by the
  14  * Free Software Foundation;  either version 2 of the  License, or (at your
  15  * option) any later version.
  16  */
  17
  18 #include <linux/config.h>
  19 #include <linux/seq_file.h>
  20 #include <linux/stddef.h>
  21
  22 #include <asm/mpc8260.h>
  23 #include <asm/machdep.h>
  24 #include <asm/io.h>
  25 #include <asm/todc.h>
  26 #include <asm/immap_8260.h>
  27
  28 static void (*callback_setup_arch)(void);
  29
  30 extern unsigned char __res[sizeof(bd_t)];
  31
  32 extern void m8260_init(unsigned long r3, unsigned long r4,
  33         unsigned long r5, unsigned long r6, unsigned long r7);
  34
  35 extern void (*late_time_init)(void);
  36
  37 static int
  38 sbc82xx_show_cpuinfo(struct seq_file *m)
  39 {
  40         bd_t    *binfo = (bd_t *)__res;
  41
  42         seq_printf(m, "vendor\t\t: Wind River\n"
  43                       "machine\t\t: SBC PowerQUICC II\n"
  44                       "\n"
  45                       "mem size\t\t: 0x%08lx\n"
  46                       "console baud\t\t: %ld\n"
  47                       "\n",
  48                       binfo->bi_memsize,
  49                       binfo->bi_baudrate);
  50         return 0;
  51 }
  52
  53 static void __init
  54 sbc82xx_setup_arch(void)
  55 {
  56         printk("SBC PowerQUICC II Port\n");
  57         callback_setup_arch();
  58 }
  59
  60 TODC_ALLOC();
  61
  62 /*
  63  * Timer init happens before mem_init but after paging init, so we cannot
  64  * directly use ioremap() at that time.
  65  * late_time_init() is call after paging init.
  66  */
  67 #ifdef CONFIG_GEN_RTC
  68 static void sbc82xx_time_init(void)
  69 {
  70         volatile memctl8260_t *mc = &immr->im_memctl;
  71         TODC_INIT(TODC_TYPE_MK48T59, 0, 0, SBC82xx_TODC_NVRAM_ADDR, 0);
  72
  73         /* Set up CS11 for RTC chip */
  74         mc->memc_br11=0;
  75         mc->memc_or11=0xffff0836;
  76         mc->memc_br11=0x80000801;
  77
  78         todc_info->nvram_data =
  79                 (unsigned int)ioremap(todc_info->nvram_data, 0x2000);
  80         BUG_ON(!todc_info->nvram_data);
  81         ppc_md.get_rtc_time     = todc_get_rtc_time;
  82         ppc_md.set_rtc_time     = todc_set_rtc_time;
  83         ppc_md.nvram_read_val   = todc_direct_read_val;
  84         ppc_md.nvram_write_val  = todc_direct_write_val;
  85         todc_time_init();
  86 }
  87 #endif /* CONFIG_GEN_RTC */
  88
  89 void __init
  90 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
  91               unsigned long r6, unsigned long r7)
  92 {
  93         /* Generic 8260 platform initialization */
  94         m8260_init(r3, r4, r5, r6, r7);
  95
  96         /* u-boot may be using one of the FCC Ethernet devices.
  97            Use the MAC address to the SCC. */
  98         __res[offsetof(bd_t, bi_enetaddr[5])] &= ~3;
  99
 100         /* Anything special for this platform */
 101         ppc_md.show_cpuinfo     = sbc82xx_show_cpuinfo;
 102
 103         callback_setup_arch     = ppc_md.setup_arch;
 104         ppc_md.setup_arch       = sbc82xx_setup_arch;
 105 #ifdef CONFIG_GEN_RTC
 106         ppc_md.time_init        = NULL;
 107         ppc_md.get_rtc_time     = NULL;
 108         ppc_md.set_rtc_time     = NULL;
 109         ppc_md.nvram_read_val   = NULL;
 110         ppc_md.nvram_write_val  = NULL;
 111         late_time_init          = sbc82xx_time_init;
 112 #endif /* CONFIG_GEN_RTC */
 113 }