arch/mips/mti-malta/malta-setup.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 2000 MIPS Technologies, Inc.  All rights reserved.
   4  * Copyright (C) 2008 Dmitri Vorobiev
   5  *
   6  *  This program is free software; you can distribute it and/or modify it
   7  *  under the terms of the GNU General Public License (Version 2) as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope it will be useful, but WITHOUT
  11  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  *  for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  18  */
  19 #include <linux/cpu.h>
  20 #include <linux/init.h>
  21 #include <linux/sched.h>
  22 #include <linux/ioport.h>
  23 #include <linux/irq.h>
  24 #include <linux/pci.h>
  25 #include <linux/screen_info.h>
  26 #include <linux/time.h>
  27
  28 #include <asm/bootinfo.h>
  29 #include <asm/mips-boards/generic.h>
  30 #include <asm/mips-boards/prom.h>
  31 #include <asm/mips-boards/malta.h>
  32 #include <asm/mips-boards/maltaint.h>
  33 #include <asm/dma.h>
  34 #include <asm/traps.h>
  35 #ifdef CONFIG_VT
  36 #include <linux/console.h>
  37 #endif
  38
  39 extern void malta_be_init(void);
  40 extern int malta_be_handler(struct pt_regs *regs, int is_fixup);
  41
  42 static struct resource standard_io_resources[] = {
  43         {
  44                 .name = "dma1",
  45                 .start = 0x00,
  46                 .end = 0x1f,
  47                 .flags = IORESOURCE_BUSY
  48         },
  49         {
  50                 .name = "timer",
  51                 .start = 0x40,
  52                 .end = 0x5f,
  53                 .flags = IORESOURCE_BUSY
  54         },
  55         {
  56                 .name = "keyboard",
  57                 .start = 0x60,
  58                 .end = 0x6f,
  59                 .flags = IORESOURCE_BUSY
  60         },
  61         {
  62                 .name = "dma page reg",
  63                 .start = 0x80,
  64                 .end = 0x8f,
  65                 .flags = IORESOURCE_BUSY
  66         },
  67         {
  68                 .name = "dma2",
  69                 .start = 0xc0,
  70                 .end = 0xdf,
  71                 .flags = IORESOURCE_BUSY
  72         },
  73 };
  74
  75 const char *get_system_type(void)
  76 {
  77         return "MIPS Malta";
  78 }
  79
  80 #if defined(CONFIG_MIPS_MT_SMTC)
  81 const char display_string[] = "       SMTC LINUX ON MALTA       ";
  82 #else
  83 const char display_string[] = "        LINUX ON MALTA       ";
  84 #endif /* CONFIG_MIPS_MT_SMTC */
  85
  86 #ifdef CONFIG_BLK_DEV_FD
  87 static void __init fd_activate(void)
  88 {
  89         /*
  90          * Activate Floppy Controller in the SMSC FDC37M817 Super I/O
  91          * Controller.
  92          * Done by YAMON 2.00 onwards
  93          */
  94         /* Entering config state. */
  95         SMSC_WRITE(SMSC_CONFIG_ENTER, SMSC_CONFIG_REG);
  96
  97         /* Activate floppy controller. */
  98         SMSC_WRITE(SMSC_CONFIG_DEVNUM, SMSC_CONFIG_REG);
  99         SMSC_WRITE(SMSC_CONFIG_DEVNUM_FLOPPY, SMSC_DATA_REG);
 100         SMSC_WRITE(SMSC_CONFIG_ACTIVATE, SMSC_CONFIG_REG);
 101         SMSC_WRITE(SMSC_CONFIG_ACTIVATE_ENABLE, SMSC_DATA_REG);
 102
 103         /* Exit config state. */
 104         SMSC_WRITE(SMSC_CONFIG_EXIT, SMSC_CONFIG_REG);
 105 }
 106 #endif
 107
 108 #ifdef CONFIG_BLK_DEV_IDE
 109 static void __init pci_clock_check(void)
 110 {
 111         unsigned int __iomem *jmpr_p =
 112                 (unsigned int *) ioremap(MALTA_JMPRS_REG, sizeof(unsigned int));
 113         int jmpr = (__raw_readl(jmpr_p) >> 2) & 0x07;
 114         static const int pciclocks[] __initconst = {
 115                 33, 20, 25, 30, 12, 16, 37, 10
 116         };
 117         int pciclock = pciclocks[jmpr];
 118         char *argptr = prom_getcmdline();
 119
 120         if (pciclock != 33 && !strstr(argptr, "idebus=")) {
 121                 printk(KERN_WARNING "WARNING: PCI clock is %dMHz, "
 122                                 "setting idebus\n", pciclock);
 123                 argptr += strlen(argptr);
 124                 sprintf(argptr, " idebus=%d", pciclock);
 125                 if (pciclock < 20 || pciclock > 66)
 126                         printk(KERN_WARNING "WARNING: IDE timing "
 127                                         "calculations will be incorrect\n");
 128         }
 129 }
 130 #endif
 131
 132 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
 133 static void __init screen_info_setup(void)
 134 {
 135         screen_info = (struct screen_info) {
 136                 .orig_x = 0,
 137                 .orig_y = 25,
 138                 .ext_mem_k = 0,
 139                 .orig_video_page = 0,
 140                 .orig_video_mode = 0,
 141                 .orig_video_cols = 80,
 142                 .unused2 = 0,
 143                 .orig_video_ega_bx = 0,
 144                 .unused3 = 0,
 145                 .orig_video_lines = 25,
 146                 .orig_video_isVGA = VIDEO_TYPE_VGAC,
 147                 .orig_video_points = 16
 148         };
 149 }
 150 #endif
 151
 152 static void __init bonito_quirks_setup(void)
 153 {
 154         char *argptr;
 155
 156         argptr = prom_getcmdline();
 157         if (strstr(argptr, "debug")) {
 158                 BONITO_BONGENCFG |= BONITO_BONGENCFG_DEBUGMODE;
 159                 printk(KERN_INFO "Enabled Bonito debug mode\n");
 160         } else
 161                 BONITO_BONGENCFG &= ~BONITO_BONGENCFG_DEBUGMODE;
 162
 163 #ifdef CONFIG_DMA_COHERENT
 164         if (BONITO_PCICACHECTRL & BONITO_PCICACHECTRL_CPUCOH_PRES) {
 165                 BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_CPUCOH_EN;
 166                 printk(KERN_INFO "Enabled Bonito CPU coherency\n");
 167
 168                 argptr = prom_getcmdline();
 169                 if (strstr(argptr, "iobcuncached")) {
 170                         BONITO_PCICACHECTRL &= ~BONITO_PCICACHECTRL_IOBCCOH_EN;
 171                         BONITO_PCIMEMBASECFG = BONITO_PCIMEMBASECFG &
 172                                 ~(BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
 173                                         BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
 174                         printk(KERN_INFO "Disabled Bonito IOBC coherency\n");
 175                 } else {
 176                         BONITO_PCICACHECTRL |= BONITO_PCICACHECTRL_IOBCCOH_EN;
 177                         BONITO_PCIMEMBASECFG |=
 178                                 (BONITO_PCIMEMBASECFG_MEMBASE0_CACHED |
 179                                         BONITO_PCIMEMBASECFG_MEMBASE1_CACHED);
 180                         printk(KERN_INFO "Enabled Bonito IOBC coherency\n");
 181                 }
 182         } else
 183                 panic("Hardware DMA cache coherency not supported");
 184 #endif
 185 }
 186
 187 void __init plat_mem_setup(void)
 188 {
 189         unsigned int i;
 190
 191         mips_pcibios_init();
 192
 193         /* Request I/O space for devices used on the Malta board. */
 194         for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
 195                 request_resource(&ioport_resource, standard_io_resources+i);
 196
 197         /*
 198          * Enable DMA channel 4 (cascade channel) in the PIIX4 south bridge.
 199          */
 200         enable_dma(4);
 201
 202 #ifdef CONFIG_DMA_COHERENT
 203         if (mips_revision_sconid != MIPS_REVISION_SCON_BONITO)
 204                 panic("Hardware DMA cache coherency not supported");
 205 #endif
 206
 207         if (mips_revision_sconid == MIPS_REVISION_SCON_BONITO)
 208                 bonito_quirks_setup();
 209
 210 #ifdef CONFIG_BLK_DEV_IDE
 211         pci_clock_check();
 212 #endif
 213
 214 #ifdef CONFIG_BLK_DEV_FD
 215         fd_activate();
 216 #endif
 217
 218 #if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
 219         screen_info_setup();
 220 #endif
 221
 222         board_be_init = malta_be_init;
 223         board_be_handler = malta_be_handler;
 224 }