git.oblomov.eu Git - linux-2.6/blob - arch/mips/momentum/ocelot_c/setup.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  * Momentum Computer Ocelot-C and -CS board dependent boot routines
   4  *
   5  * Copyright (C) 1996, 1997, 2001  Ralf Baechle
   6  * Copyright (C) 2000 RidgeRun, Inc.
   7  * Copyright (C) 2001 Red Hat, Inc.
   8  * Copyright (C) 2002 Momentum Computer
   9  *
  10  * Author: Matthew Dharm, Momentum Computer
  11  *   mdharm@momenco.com
  12  *
  13  * Louis Hamilton, Red Hat, Inc.
  14  *   hamilton@redhat.com  [MIPS64 modifications]
  15  *
  16  * Author: RidgeRun, Inc.
  17  *   glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
  18  *
  19  * Copyright 2001 MontaVista Software Inc.
  20  * Author: jsun@mvista.com or jsun@junsun.net
  21  *
  22  *  This program is free software; you can redistribute  it and/or modify it
  23  *  under  the terms of  the GNU General  Public License as published by the
  24  *  Free Software Foundation;  either version 2 of the  License, or (at your
  25  *  option) any later version.
  26  *
  27  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  28  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  29  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  30  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  31  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  32  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  33  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  34  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  35  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  36  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  *
  38  *  You should have received a copy of the  GNU General Public License along
  39  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  40  *  675 Mass Ave, Cambridge, MA 02139, USA.
  41  *
  42  */
  43 #include <linux/config.h>
  44 #include <linux/bcd.h>
  45 #include <linux/init.h>
  46 #include <linux/kernel.h>
  47 #include <linux/types.h>
  48 #include <linux/mm.h>
  49 #include <linux/swap.h>
  50 #include <linux/ioport.h>
  51 #include <linux/sched.h>
  52 #include <linux/interrupt.h>
  53 #include <linux/pci.h>
  54 #include <linux/pm.h>
  55 #include <linux/timex.h>
  56 #include <linux/vmalloc.h>
  57 #include <linux/mv643xx.h>
  58
  59 #include <asm/time.h>
  60 #include <asm/bootinfo.h>
  61 #include <asm/page.h>
  62 #include <asm/io.h>
  63 #include <asm/irq.h>
  64 #include <asm/pci.h>
  65 #include <asm/processor.h>
  66 #include <asm/ptrace.h>
  67 #include <asm/reboot.h>
  68 #include <asm/marvell.h>
  69 #include <linux/bootmem.h>
  70 #include <linux/blkdev.h>
  71 #include "ocelot_c_fpga.h"
  72
  73 unsigned long marvell_base;
  74 extern unsigned long mv64340_sram_base;
  75 unsigned long cpu_clock;
  76
  77 /* These functions are used for rebooting or halting the machine*/
  78 extern void momenco_ocelot_restart(char *command);
  79 extern void momenco_ocelot_halt(void);
  80 extern void momenco_ocelot_power_off(void);
  81
  82 void momenco_time_init(void);
  83
  84 static char reset_reason;
  85
  86 void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, unsigned long entryhi, unsigned long pagemask);
  87
  88 static unsigned long ENTRYLO(unsigned long paddr)
  89 {
  90         return ((paddr & PAGE_MASK) |
  91                (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
  92                 _CACHE_UNCACHED)) >> 6;
  93 }
  94
  95 /* setup code for a handoff from a version 2 PMON 2000 PROM */
  96 void PMON_v2_setup(void)
  97 {
  98         /* Some wired TLB entries for the MV64340 and perhiperals. The
  99            MV64340 is going to be hit on every IRQ anyway - there's
 100            absolutely no point in letting it be a random TLB entry, as
 101            it'll just cause needless churning of the TLB. And we use
 102            the other half for the serial port, which is just a PITA
 103            otherwise :)
 104
 105                 Device                  Physical        Virtual
 106                 MV64340 Internal Regs   0xf4000000      0xf4000000
 107                 Ocelot-C[S] PLD (CS0)   0xfc000000      0xfc000000
 108                 NVRAM (CS1)             0xfc800000      0xfc800000
 109                 UARTs (CS2)             0xfd000000      0xfd000000
 110                 Internal SRAM           0xfe000000      0xfe000000
 111                 M-Systems DOC (CS3)     0xff000000      0xff000000
 112         */
 113   printk("PMON_v2_setup\n");
 114
 115 #ifdef CONFIG_64BIT
 116         /* marvell and extra space */
 117         add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xfffffffff4000000, PM_64K);
 118         /* fpga, rtc, and uart */
 119         add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfffffffffc000000, PM_16M);
 120         /* m-sys and internal SRAM */
 121         add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfffffffffe000000, PM_16M);
 122
 123         marvell_base = 0xfffffffff4000000;
 124         mv64340_sram_base = 0xfffffffffe000000;
 125 #else
 126         /* marvell and extra space */
 127         add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
 128         /* fpga, rtc, and uart */
 129         add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfc000000, PM_16M);
 130         /* m-sys and internal SRAM */
 131         add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfe000000, PM_16M);
 132
 133         marvell_base = 0xf4000000;
 134         mv64340_sram_base = 0xfe000000;
 135 #endif
 136 }
 137
 138 unsigned long m48t37y_get_time(void)
 139 {
 140 #ifdef CONFIG_64BIT
 141         unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
 142 #else
 143         unsigned char* rtc_base = (unsigned char*)0xfc800000;
 144 #endif
 145         unsigned int year, month, day, hour, min, sec;
 146         unsigned long flags;
 147
 148         spin_lock_irqsave(&rtc_lock, flags);
 149         /* stop the update */
 150         rtc_base[0x7ff8] = 0x40;
 151
 152         year = BCD2BIN(rtc_base[0x7fff]);
 153         year += BCD2BIN(rtc_base[0x7ff1]) * 100;
 154
 155         month = BCD2BIN(rtc_base[0x7ffe]);
 156
 157         day = BCD2BIN(rtc_base[0x7ffd]);
 158
 159         hour = BCD2BIN(rtc_base[0x7ffb]);
 160         min = BCD2BIN(rtc_base[0x7ffa]);
 161         sec = BCD2BIN(rtc_base[0x7ff9]);
 162
 163         /* start the update */
 164         rtc_base[0x7ff8] = 0x00;
 165         spin_unlock_irqrestore(&rtc_lock, flags);
 166
 167         return mktime(year, month, day, hour, min, sec);
 168 }
 169
 170 int m48t37y_set_time(unsigned long sec)
 171 {
 172 #ifdef CONFIG_64BIT
 173         unsigned char* rtc_base = (unsigned char*)0xfffffffffc800000;
 174 #else
 175         unsigned char* rtc_base = (unsigned char*)0xfc800000;
 176 #endif
 177         struct rtc_time tm;
 178         unsigned long flags;
 179
 180         /* convert to a more useful format -- note months count from 0 */
 181         to_tm(sec, &tm);
 182         tm.tm_mon += 1;
 183
 184         spin_lock_irqsave(&rtc_lock, flags);
 185         /* enable writing */
 186         rtc_base[0x7ff8] = 0x80;
 187
 188         /* year */
 189         rtc_base[0x7fff] = BIN2BCD(tm.tm_year % 100);
 190         rtc_base[0x7ff1] = BIN2BCD(tm.tm_year / 100);
 191
 192         /* month */
 193         rtc_base[0x7ffe] = BIN2BCD(tm.tm_mon);
 194
 195         /* day */
 196         rtc_base[0x7ffd] = BIN2BCD(tm.tm_mday);
 197
 198         /* hour/min/sec */
 199         rtc_base[0x7ffb] = BIN2BCD(tm.tm_hour);
 200         rtc_base[0x7ffa] = BIN2BCD(tm.tm_min);
 201         rtc_base[0x7ff9] = BIN2BCD(tm.tm_sec);
 202
 203         /* day of week -- not really used, but let's keep it up-to-date */
 204         rtc_base[0x7ffc] = BIN2BCD(tm.tm_wday + 1);
 205
 206         /* disable writing */
 207         rtc_base[0x7ff8] = 0x00;
 208         spin_unlock_irqrestore(&rtc_lock, flags);
 209
 210         return 0;
 211 }
 212
 213 void momenco_timer_setup(struct irqaction *irq)
 214 {
 215         setup_irq(7, irq);
 216 }
 217
 218 void momenco_time_init(void)
 219 {
 220 #ifdef CONFIG_CPU_SR71000
 221         mips_hpt_frequency = cpu_clock;
 222 #elif defined(CONFIG_CPU_RM7000)
 223         mips_hpt_frequency = cpu_clock / 2;
 224 #else
 225 #error Unknown CPU for this board
 226 #endif
 227         printk("momenco_time_init cpu_clock=%d\n", cpu_clock);
 228         board_timer_setup = momenco_timer_setup;
 229
 230         rtc_get_time = m48t37y_get_time;
 231         rtc_set_time = m48t37y_set_time;
 232 }
 233
 234 void __init plat_setup(void)
 235 {
 236         unsigned int tmpword;
 237
 238         board_time_init = momenco_time_init;
 239
 240         _machine_restart = momenco_ocelot_restart;
 241         _machine_halt = momenco_ocelot_halt;
 242         pm_power_off = momenco_ocelot_power_off;
 243
 244         /*
 245          * initrd_start = (ulong)ocelot_initrd_start;
 246          * initrd_end = (ulong)ocelot_initrd_start + (ulong)ocelot_initrd_size;
 247          * initrd_below_start_ok = 1;
 248          */
 249
 250         /* do handoff reconfiguration */
 251         PMON_v2_setup();
 252
 253         /* shut down ethernet ports, just to be sure our memory doesn't get
 254          * corrupted by random ethernet traffic.
 255          */
 256         MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
 257         MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
 258         MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
 259         MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
 260         do {}
 261           while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
 262         do {}
 263           while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
 264         do {}
 265           while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
 266         do {}
 267           while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
 268         MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0),
 269                  MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
 270         MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1),
 271                  MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
 272
 273         /* Turn off the Bit-Error LED */
 274         OCELOT_FPGA_WRITE(0x80, CLR);
 275
 276         tmpword = OCELOT_FPGA_READ(BOARDREV);
 277 #ifdef CONFIG_CPU_SR71000
 278         if (tmpword < 26)
 279                 printk("Momenco Ocelot-CS: Board Assembly Rev. %c\n",
 280                         'A'+tmpword);
 281         else
 282                 printk("Momenco Ocelot-CS: Board Assembly Revision #0x%x\n",
 283                         tmpword);
 284 #else
 285         if (tmpword < 26)
 286                 printk("Momenco Ocelot-C: Board Assembly Rev. %c\n",
 287                         'A'+tmpword);
 288         else
 289                 printk("Momenco Ocelot-C: Board Assembly Revision #0x%x\n",
 290                         tmpword);
 291 #endif
 292
 293         tmpword = OCELOT_FPGA_READ(FPGA_REV);
 294         printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
 295         tmpword = OCELOT_FPGA_READ(RESET_STATUS);
 296         printk("Reset reason: 0x%x\n", tmpword);
 297         switch (tmpword) {
 298                 case 0x1:
 299                         printk("  - Power-up reset\n");
 300                         break;
 301                 case 0x2:
 302                         printk("  - Push-button reset\n");
 303                         break;
 304                 case 0x4:
 305                         printk("  - cPCI bus reset\n");
 306                         break;
 307                 case 0x8:
 308                         printk("  - Watchdog reset\n");
 309                         break;
 310                 case 0x10:
 311                         printk("  - Software reset\n");
 312                         break;
 313                 default:
 314                         printk("  - Unknown reset cause\n");
 315         }
 316         reset_reason = tmpword;
 317         OCELOT_FPGA_WRITE(0xff, RESET_STATUS);
 318
 319         tmpword = OCELOT_FPGA_READ(CPCI_ID);
 320         printk("cPCI ID register: 0x%02x\n", tmpword);
 321         printk("  - Slot number: %d\n", tmpword & 0x1f);
 322         printk("  - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
 323         printk("  - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");
 324
 325         tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
 326         printk("Board Status register: 0x%02x\n", tmpword);
 327         printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
 328         printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
 329         printk("  - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
 330         printk("  - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
 331
 332         switch(tmpword &3) {
 333         case 3:
 334                 /* 512MiB */
 335                 add_memory_region(0x0, 0x200<<20, BOOT_MEM_RAM);
 336                 break;
 337         case 2:
 338                 /* 256MiB */
 339                 add_memory_region(0x0, 0x100<<20, BOOT_MEM_RAM);
 340                 break;
 341         case 1:
 342                 /* 128MiB */
 343                 add_memory_region(0x0,  0x80<<20, BOOT_MEM_RAM);
 344                 break;
 345         case 0:
 346                 /* 1GiB -- needs CONFIG_HIGHMEM */
 347                 add_memory_region(0x0, 0x400<<20, BOOT_MEM_RAM);
 348                 break;
 349         }
 350 }
 351
 352 #ifndef CONFIG_64BIT
 353 /* This needs to be one of the first initcalls, because no I/O port access
 354    can work before this */
 355 static int io_base_ioremap(void)
 356 {
 357         /* we're mapping PCI accesses from 0xc0000000 to 0xf0000000 */
 358         void *io_remap_range = ioremap(0xc0000000, 0x30000000);
 359
 360         if (!io_remap_range) {
 361                 panic("Could not ioremap I/O port range");
 362         }
 363         printk("io_remap_range set at 0x%08x\n", (uint32_t)io_remap_range);
 364         set_io_port_base(io_remap_range - 0xc0000000);
 365
 366         return 0;
 367 }
 368
 369 module_init(io_base_ioremap);
 370 #endif