arch/powerpc/boot/cuboot-c2k.c

   1 /*
   2  * GEFanuc C2K platform code.
   3  *
   4  * Author: Remi Machet <rmachet@slac.stanford.edu>
   5  *
   6  * Originated from prpmc2800.c
   7  *
   8  * 2008 (c) Stanford University
   9  * 2007 (c) MontaVista, Software, Inc.
  10  *
  11  * This program is free software; you can redistribute it and/or modify it
  12  * under the terms of the GNU General Public License version 2 as published
  13  * by the Free Software Foundation.
  14  */
  15
  16 #include "types.h"
  17 #include "stdio.h"
  18 #include "io.h"
  19 #include "ops.h"
  20 #include "elf.h"
  21 #include "mv64x60.h"
  22 #include "cuboot.h"
  23 #include "ppcboot.h"
  24
  25 static u8 *bridge_base;
  26
  27 static void c2k_bridge_setup(u32 mem_size)
  28 {
  29         u32 i, v[30], enables, acc_bits;
  30         u32 pci_base_hi, pci_base_lo, size, buf[2];
  31         unsigned long cpu_base;
  32         int rc;
  33         void *devp, *mv64x60_devp;
  34         u8 *bridge_pbase, is_coherent;
  35         struct mv64x60_cpu2pci_win *tbl;
  36         int bus;
  37
  38         bridge_pbase = mv64x60_get_bridge_pbase();
  39         is_coherent = mv64x60_is_coherent();
  40
  41         if (is_coherent)
  42                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_WB
  43                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
  44                         | MV64x60_PCI_ACC_CNTL_MBURST_32_BYTES
  45                         | MV64x60_PCI_ACC_CNTL_RDSIZE_32_BYTES;
  46         else
  47                 acc_bits = MV64x60_PCI_ACC_CNTL_SNOOP_NONE
  48                         | MV64x60_PCI_ACC_CNTL_SWAP_NONE
  49                         | MV64x60_PCI_ACC_CNTL_MBURST_128_BYTES
  50                         | MV64x60_PCI_ACC_CNTL_RDSIZE_256_BYTES;
  51
  52         mv64x60_config_ctlr_windows(bridge_base, bridge_pbase, is_coherent);
  53         mv64x60_devp = find_node_by_compatible(NULL, "marvell,mv64360");
  54         if (mv64x60_devp == NULL)
  55                 fatal("Error: Missing marvell,mv64360 device tree node\n\r");
  56
  57         enables = in_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE));
  58         enables |= 0x007ffe00; /* Disable all cpu->pci windows */
  59         out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE), enables);
  60
  61         /* Get the cpu -> pci i/o & mem mappings from the device tree */
  62         devp = NULL;
  63         for (bus = 0; ; bus++) {
  64                 char name[] = "pci ";
  65
  66                 name[strlen(name)-1] = bus+'0';
  67
  68                 devp = find_node_by_alias(name);
  69                 if (devp == NULL)
  70                         break;
  71
  72                 if (bus >= 2)
  73                         fatal("Error: Only 2 PCI controllers are supported at" \
  74                                 " this time.\n");
  75
  76                 mv64x60_config_pci_windows(bridge_base, bridge_pbase, bus, 0,
  77                                 mem_size, acc_bits);
  78
  79                 rc = getprop(devp, "ranges", v, sizeof(v));
  80                 if (rc == 0)
  81                         fatal("Error: Can't find marvell,mv64360-pci ranges"
  82                                 " property\n\r");
  83
  84                 /* Get the cpu -> pci i/o & mem mappings from the device tree */
  85
  86                 for (i = 0; i < rc; i += 6) {
  87                         switch (v[i] & 0xff000000) {
  88                         case 0x01000000: /* PCI I/O Space */
  89                                 tbl = mv64x60_cpu2pci_io;
  90                                 break;
  91                         case 0x02000000: /* PCI MEM Space */
  92                                 tbl = mv64x60_cpu2pci_mem;
  93                                 break;
  94                         default:
  95                                 continue;
  96                         }
  97
  98                         pci_base_hi = v[i+1];
  99                         pci_base_lo = v[i+2];
 100                         cpu_base = v[i+3];
 101                         size = v[i+5];
 102
 103                         buf[0] = cpu_base;
 104                         buf[1] = size;
 105
 106                         if (!dt_xlate_addr(devp, buf, sizeof(buf), &cpu_base))
 107                                 fatal("Error: Can't translate PCI address " \
 108                                                 "0x%x\n\r", (u32)cpu_base);
 109
 110                         mv64x60_config_cpu2pci_window(bridge_base, bus,
 111                                 pci_base_hi, pci_base_lo, cpu_base, size, tbl);
 112                 }
 113
 114                 enables &= ~(3<<(9+bus*5)); /* Enable cpu->pci<bus> i/o,
 115                                                 cpu->pci<bus> mem0 */
 116                 out_le32((u32 *)(bridge_base + MV64x60_CPU_BAR_ENABLE),
 117                         enables);
 118         };
 119 }
 120
 121 static void c2k_fixups(void)
 122 {
 123         u32 mem_size;
 124
 125         mem_size = mv64x60_get_mem_size(bridge_base);
 126         c2k_bridge_setup(mem_size); /* Do necessary bridge setup */
 127 }
 128
 129 #define MV64x60_MPP_CNTL_0      0xf000
 130 #define MV64x60_MPP_CNTL_2      0xf008
 131 #define MV64x60_GPP_IO_CNTL     0xf100
 132 #define MV64x60_GPP_LEVEL_CNTL  0xf110
 133 #define MV64x60_GPP_VALUE_SET   0xf118
 134
 135 static void c2k_reset(void)
 136 {
 137         u32 temp;
 138
 139         udelay(5000000);
 140
 141         if (bridge_base != 0) {
 142                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0));
 143                 temp &= 0xFFFF0FFF;
 144                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_0), temp);
 145
 146                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 147                 temp |= 0x00000004;
 148                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 149
 150                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 151                 temp |= 0x00000004;
 152                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 153
 154                 temp = in_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2));
 155                 temp &= 0xFFFF0FFF;
 156                 out_le32((u32 *)(bridge_base + MV64x60_MPP_CNTL_2), temp);
 157
 158                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL));
 159                 temp |= 0x00080000;
 160                 out_le32((u32 *)(bridge_base + MV64x60_GPP_LEVEL_CNTL), temp);
 161
 162                 temp = in_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL));
 163                 temp |= 0x00080000;
 164                 out_le32((u32 *)(bridge_base + MV64x60_GPP_IO_CNTL), temp);
 165
 166                 out_le32((u32 *)(bridge_base + MV64x60_GPP_VALUE_SET),
 167                                 0x00080004);
 168         }
 169
 170         for (;;);
 171 }
 172
 173 static bd_t bd;
 174
 175 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 176                         unsigned long r6, unsigned long r7)
 177 {
 178         CUBOOT_INIT();
 179
 180         fdt_init(_dtb_start);
 181
 182         bridge_base = mv64x60_get_bridge_base();
 183
 184         platform_ops.fixups = c2k_fixups;
 185         platform_ops.exit = c2k_reset;
 186
 187         if (serial_console_init() < 0)
 188                 exit();
 189 }