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/bcd.h>
  44 #include <linux/init.h>
  45 #include <linux/kernel.h>
  46 #include <linux/types.h>
  47 #include <linux/mm.h>
  48 #include <linux/swap.h>
  49 #include <linux/ioport.h>
  50 #include <linux/sched.h>
  51 #include <linux/interrupt.h>
  52 #include <linux/pci.h>
  53 #include <linux/pm.h>
  54 #include <linux/timex.h>
  55 #include <linux/vmalloc.h>
  56 #include <linux/mv643xx.h>
  57
  58 #include <asm/time.h>
  59 #include <asm/bootinfo.h>
  60 #include <asm/page.h>
  61 #include <asm/io.h>
  62 #include <asm/irq.h>
  63 #include <asm/pci.h>
  64 #include <asm/processor.h>
  65 #include <asm/reboot.h>
  66 #include <asm/marvell.h>
  67 #include <linux/bootmem.h>
  68 #include <linux/blkdev.h>
  69 #include "ocelot_c_fpga.h"
  70
  71 unsigned long marvell_base;
  72 unsigned int cpu_clock;
  73
  74 /* These functions are used for rebooting or halting the machine*/
  75 extern void momenco_ocelot_restart(char *command);
  76 extern void momenco_ocelot_halt(void);
  77 extern void momenco_ocelot_power_off(void);
  78
  79 void momenco_time_init(void);
  80
  81 static char reset_reason;
  82
  83 void add_wired_entry(unsigned long entrylo0, unsigned long entrylo1, unsigned long entryhi, unsigned long pagemask);
  84
  85 static unsigned long ENTRYLO(unsigned long paddr)
  86 {
  87         return ((paddr & PAGE_MASK) |
  88                (_PAGE_PRESENT | __READABLE | __WRITEABLE | _PAGE_GLOBAL |
  89                 _CACHE_UNCACHED)) >> 6;
  90 }
  91
  92 /* setup code for a handoff from a version 2 PMON 2000 PROM */
  93 void PMON_v2_setup(void)
  94 {
  95         /* Some wired TLB entries for the MV64340 and perhiperals. The
  96            MV64340 is going to be hit on every IRQ anyway - there's
  97            absolutely no point in letting it be a random TLB entry, as
  98            it'll just cause needless churning of the TLB. And we use
  99            the other half for the serial port, which is just a PITA
 100            otherwise :)
 101
 102                 Device                  Physical        Virtual
 103                 MV64340 Internal Regs   0xf4000000      0xf4000000
 104                 Ocelot-C[S] PLD (CS0)   0xfc000000      0xfc000000
 105                 NVRAM (CS1)             0xfc800000      0xfc800000
 106                 UARTs (CS2)             0xfd000000      0xfd000000
 107                 Internal SRAM           0xfe000000      0xfe000000
 108                 M-Systems DOC (CS3)     0xff000000      0xff000000
 109         */
 110   printk("PMON_v2_setup\n");
 111
 112 #ifdef CONFIG_64BIT
 113         /* marvell and extra space */
 114         add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xfffffffff4000000, PM_64K);
 115         /* fpga, rtc, and uart */
 116         add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfffffffffc000000, PM_16M);
 117         /* m-sys and internal SRAM */
 118         add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfffffffffe000000, PM_16M);
 119
 120         marvell_base = 0xfffffffff4000000;
 121 #else
 122         /* marvell and extra space */
 123         add_wired_entry(ENTRYLO(0xf4000000), ENTRYLO(0xf4010000), 0xf4000000, PM_64K);
 124         /* fpga, rtc, and uart */
 125         add_wired_entry(ENTRYLO(0xfc000000), ENTRYLO(0xfd000000), 0xfc000000, PM_16M);
 126         /* m-sys and internal SRAM */
 127         add_wired_entry(ENTRYLO(0xfe000000), ENTRYLO(0xff000000), 0xfe000000, PM_16M);
 128
 129         marvell_base = 0xf4000000;
 130 #endif
 131 }
 132
 133 unsigned long m48t37y_get_time(void)
 134 {
 135 #ifdef CONFIG_64BIT
 136         unsigned char *rtc_base = (unsigned char*)0xfffffffffc800000;
 137 #else
 138         unsigned char* rtc_base = (unsigned char*)0xfc800000;
 139 #endif
 140         unsigned int year, month, day, hour, min, sec;
 141         unsigned long flags;
 142
 143         spin_lock_irqsave(&rtc_lock, flags);
 144         /* stop the update */
 145         rtc_base[0x7ff8] = 0x40;
 146
 147         year = BCD2BIN(rtc_base[0x7fff]);
 148         year += BCD2BIN(rtc_base[0x7ff1]) * 100;
 149
 150         month = BCD2BIN(rtc_base[0x7ffe]);
 151
 152         day = BCD2BIN(rtc_base[0x7ffd]);
 153
 154         hour = BCD2BIN(rtc_base[0x7ffb]);
 155         min = BCD2BIN(rtc_base[0x7ffa]);
 156         sec = BCD2BIN(rtc_base[0x7ff9]);
 157
 158         /* start the update */
 159         rtc_base[0x7ff8] = 0x00;
 160         spin_unlock_irqrestore(&rtc_lock, flags);
 161
 162         return mktime(year, month, day, hour, min, sec);
 163 }
 164
 165 int m48t37y_set_time(unsigned long sec)
 166 {
 167 #ifdef CONFIG_64BIT
 168         unsigned char* rtc_base = (unsigned char*)0xfffffffffc800000;
 169 #else
 170         unsigned char* rtc_base = (unsigned char*)0xfc800000;
 171 #endif
 172         struct rtc_time tm;
 173         unsigned long flags;
 174
 175         /* convert to a more useful format -- note months count from 0 */
 176         to_tm(sec, &tm);
 177         tm.tm_mon += 1;
 178
 179         spin_lock_irqsave(&rtc_lock, flags);
 180         /* enable writing */
 181         rtc_base[0x7ff8] = 0x80;
 182
 183         /* year */
 184         rtc_base[0x7fff] = BIN2BCD(tm.tm_year % 100);
 185         rtc_base[0x7ff1] = BIN2BCD(tm.tm_year / 100);
 186
 187         /* month */
 188         rtc_base[0x7ffe] = BIN2BCD(tm.tm_mon);
 189
 190         /* day */
 191         rtc_base[0x7ffd] = BIN2BCD(tm.tm_mday);
 192
 193         /* hour/min/sec */
 194         rtc_base[0x7ffb] = BIN2BCD(tm.tm_hour);
 195         rtc_base[0x7ffa] = BIN2BCD(tm.tm_min);
 196         rtc_base[0x7ff9] = BIN2BCD(tm.tm_sec);
 197
 198         /* day of week -- not really used, but let's keep it up-to-date */
 199         rtc_base[0x7ffc] = BIN2BCD(tm.tm_wday + 1);
 200
 201         /* disable writing */
 202         rtc_base[0x7ff8] = 0x00;
 203         spin_unlock_irqrestore(&rtc_lock, flags);
 204
 205         return 0;
 206 }
 207
 208 void __init plat_timer_setup(struct irqaction *irq)
 209 {
 210         setup_irq(7, irq);
 211 }
 212
 213 void momenco_time_init(void)
 214 {
 215 #ifdef CONFIG_CPU_SR71000
 216         mips_hpt_frequency = cpu_clock;
 217 #elif defined(CONFIG_CPU_RM7000)
 218         mips_hpt_frequency = cpu_clock / 2;
 219 #else
 220 #error Unknown CPU for this board
 221 #endif
 222         printk("momenco_time_init cpu_clock=%d\n", cpu_clock);
 223
 224         rtc_mips_get_time = m48t37y_get_time;
 225         rtc_mips_set_time = m48t37y_set_time;
 226 }
 227
 228 void __init plat_mem_setup(void)
 229 {
 230         unsigned int tmpword;
 231
 232         board_time_init = momenco_time_init;
 233
 234         _machine_restart = momenco_ocelot_restart;
 235         _machine_halt = momenco_ocelot_halt;
 236         pm_power_off = momenco_ocelot_power_off;
 237
 238         /*
 239          * initrd_start = (unsigned long)ocelot_initrd_start;
 240          * initrd_end = (unsigned long)ocelot_initrd_start + (ulong)ocelot_initrd_size;
 241          * initrd_below_start_ok = 1;
 242          */
 243
 244         /* do handoff reconfiguration */
 245         PMON_v2_setup();
 246
 247         /* shut down ethernet ports, just to be sure our memory doesn't get
 248          * corrupted by random ethernet traffic.
 249          */
 250         MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0), 0xff << 8);
 251         MV_WRITE(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1), 0xff << 8);
 252         MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0), 0xff << 8);
 253         MV_WRITE(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1), 0xff << 8);
 254         do {}
 255           while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(0)) & 0xff);
 256         do {}
 257           while (MV_READ(MV643XX_ETH_RECEIVE_QUEUE_COMMAND_REG(1)) & 0xff);
 258         do {}
 259           while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(0)) & 0xff);
 260         do {}
 261           while (MV_READ(MV643XX_ETH_TRANSMIT_QUEUE_COMMAND_REG(1)) & 0xff);
 262         MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0),
 263                  MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(0)) & ~1);
 264         MV_WRITE(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1),
 265                  MV_READ(MV643XX_ETH_PORT_SERIAL_CONTROL_REG(1)) & ~1);
 266
 267         /* Turn off the Bit-Error LED */
 268         OCELOT_FPGA_WRITE(0x80, CLR);
 269
 270         tmpword = OCELOT_FPGA_READ(BOARDREV);
 271 #ifdef CONFIG_CPU_SR71000
 272         if (tmpword < 26)
 273                 printk("Momenco Ocelot-CS: Board Assembly Rev. %c\n",
 274                         'A'+tmpword);
 275         else
 276                 printk("Momenco Ocelot-CS: Board Assembly Revision #0x%x\n",
 277                         tmpword);
 278 #else
 279         if (tmpword < 26)
 280                 printk("Momenco Ocelot-C: Board Assembly Rev. %c\n",
 281                         'A'+tmpword);
 282         else
 283                 printk("Momenco Ocelot-C: Board Assembly Revision #0x%x\n",
 284                         tmpword);
 285 #endif
 286
 287         tmpword = OCELOT_FPGA_READ(FPGA_REV);
 288         printk("FPGA Rev: %d.%d\n", tmpword>>4, tmpword&15);
 289         tmpword = OCELOT_FPGA_READ(RESET_STATUS);
 290         printk("Reset reason: 0x%x\n", tmpword);
 291         switch (tmpword) {
 292                 case 0x1:
 293                         printk("  - Power-up reset\n");
 294                         break;
 295                 case 0x2:
 296                         printk("  - Push-button reset\n");
 297                         break;
 298                 case 0x4:
 299                         printk("  - cPCI bus reset\n");
 300                         break;
 301                 case 0x8:
 302                         printk("  - Watchdog reset\n");
 303                         break;
 304                 case 0x10:
 305                         printk("  - Software reset\n");
 306                         break;
 307                 default:
 308                         printk("  - Unknown reset cause\n");
 309         }
 310         reset_reason = tmpword;
 311         OCELOT_FPGA_WRITE(0xff, RESET_STATUS);
 312
 313         tmpword = OCELOT_FPGA_READ(CPCI_ID);
 314         printk("cPCI ID register: 0x%02x\n", tmpword);
 315         printk("  - Slot number: %d\n", tmpword & 0x1f);
 316         printk("  - PCI bus present: %s\n", tmpword & 0x40 ? "yes" : "no");
 317         printk("  - System Slot: %s\n", tmpword & 0x20 ? "yes" : "no");
 318
 319         tmpword = OCELOT_FPGA_READ(BOARD_STATUS);
 320         printk("Board Status register: 0x%02x\n", tmpword);
 321         printk("  - User jumper: %s\n", (tmpword & 0x80)?"installed":"absent");
 322         printk("  - Boot flash write jumper: %s\n", (tmpword&0x40)?"installed":"absent");
 323         printk("  - L3 Cache size: %d MiB\n", (1<<((tmpword&12) >> 2))&~1);
 324         printk("  - SDRAM size: %d MiB\n", 1<<(6+(tmpword&3)));
 325
 326         switch(tmpword &3) {
 327         case 3:
 328                 /* 512MiB */
 329                 add_memory_region(0x0, 0x200<<20, BOOT_MEM_RAM);
 330                 break;
 331         case 2:
 332                 /* 256MiB */
 333                 add_memory_region(0x0, 0x100<<20, BOOT_MEM_RAM);
 334                 break;
 335         case 1:
 336                 /* 128MiB */
 337                 add_memory_region(0x0,  0x80<<20, BOOT_MEM_RAM);
 338                 break;
 339         case 0:
 340                 /* 1GiB -- needs CONFIG_HIGHMEM */
 341                 add_memory_region(0x0, 0x400<<20, BOOT_MEM_RAM);
 342                 break;
 343         }
 344 }
 345
 346 /*
 347  * This needs to be one of the first initcalls, because no I/O port access
 348  * can work before this
 349  */
 350 static int io_base_ioremap(void)
 351 {
 352         void __iomem * io_remap_range = ioremap(0xc0000000UL, 0x10000);
 353
 354         if (!io_remap_range)
 355                 panic("Could not ioremap I/O port range");
 356
 357         set_io_port_base((unsigned long) io_remap_range);
 358
 359         return 0;
 360 }
 361
 362 module_init(io_base_ioremap);