cpu/mpc85xx/pci.c

   1 /*
   2  * Copyright 2004 Freescale Semiconductor.
   3  * Copyright (C) 2003 Motorola Inc.
   4  * Xianghua Xiao (x.xiao@motorola.com)
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 /*
  26  * PCI Configuration space access support for MPC85xx PCI Bridge
  27  */
  28 #include <common.h>
  29 #include <asm/cpm_85xx.h>
  30 #include <pci.h>
  31
  32
  33 #if defined(CONFIG_PCI)
  34
  35 static struct pci_controller *pci_hose;
  36
  37 void
  38 pci_mpc85xx_init(struct pci_controller *board_hose)
  39 {
  40         u16 reg16;
  41         u32 dev;
  42
  43         volatile immap_t    *immap = (immap_t *)CFG_CCSRBAR;
  44         volatile ccsr_pcix_t *pcix = &immap->im_pcix;
  45         volatile ccsr_pcix_t *pcix2 = &immap->im_pcix2;
  46         volatile ccsr_gur_t *gur = &immap->im_gur;
  47         struct pci_controller * hose;
  48
  49         pci_hose = board_hose;
  50
  51         hose = &pci_hose[0];
  52
  53         hose->first_busno = 0;
  54         hose->last_busno = 0xff;
  55
  56         pci_setup_indirect(hose,
  57                            (CFG_IMMR+0x8000),
  58                            (CFG_IMMR+0x8004));
  59
  60         /*
  61          * Hose scan.
  62          */
  63         dev = PCI_BDF(hose->first_busno, 0, 0);
  64         pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
  65         reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
  66         pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
  67
  68         /*
  69          * Clear non-reserved bits in status register.
  70          */
  71         pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
  72
  73         if (!(gur->pordevsr & PORDEVSR_PCI)) {
  74                 /* PCI-X init */
  75                 if (CONFIG_SYS_CLK_FREQ < 66000000)
  76                         printf("PCI-X will only work at 66 MHz\n");
  77
  78                 reg16 = PCI_X_CMD_MAX_SPLIT | PCI_X_CMD_MAX_READ
  79                         | PCI_X_CMD_ERO | PCI_X_CMD_DPERR_E;
  80                 pci_hose_write_config_word(hose, dev, PCIX_COMMAND, reg16);
  81         }
  82
  83         pcix->potar1   = (CFG_PCI1_MEM_BASE >> 12) & 0x000fffff;
  84         pcix->potear1  = 0x00000000;
  85         pcix->powbar1  = (CFG_PCI1_MEM_PHYS >> 12) & 0x000fffff;
  86         pcix->powbear1 = 0x00000000;
  87         pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
  88                         POWAR_MEM_WRITE | POWAR_MEM_512M);
  89
  90         pcix->potar2  = (CFG_PCI1_IO_BASE >> 12) & 0x000fffff;
  91         pcix->potear2  = 0x00000000;
  92         pcix->powbar2  = (CFG_PCI1_IO_PHYS >> 12) & 0x000fffff;
  93         pcix->powbear2 = 0x00000000;
  94         pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
  95                         POWAR_IO_WRITE | POWAR_IO_1M);
  96
  97         pcix->pitar1 = 0x00000000;
  98         pcix->piwbar1 = 0x00000000;
  99         pcix->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
 100                         PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
 101
 102         pcix->powar3 = 0;
 103         pcix->powar4 = 0;
 104         pcix->piwar2 = 0;
 105         pcix->piwar3 = 0;
 106
 107         pci_set_region(hose->regions + 0,
 108                        CFG_PCI1_MEM_BASE,
 109                        CFG_PCI1_MEM_PHYS,
 110                        CFG_PCI1_MEM_SIZE,
 111                        PCI_REGION_MEM);
 112
 113         pci_set_region(hose->regions + 1,
 114                        CFG_PCI1_IO_BASE,
 115                        CFG_PCI1_IO_PHYS,
 116                        CFG_PCI1_IO_SIZE,
 117                        PCI_REGION_IO);
 118
 119         hose->region_count = 2;
 120
 121         pci_register_hose(hose);
 122
 123 #if defined(CONFIG_MPC8555CDS) || defined(CONFIG_MPC8541CDS)
 124         /*
 125          * This is a SW workaround for an apparent HW problem
 126          * in the PCI controller on the MPC85555/41 CDS boards.
 127          * The first config cycle must be to a valid, known
 128          * device on the PCI bus in order to trick the PCI
 129          * controller state machine into a known valid state.
 130          * Without this, the first config cycle has the chance
 131          * of hanging the controller permanently, just leaving
 132          * it in a semi-working state, or leaving it working.
 133          *
 134          * Pick on the Tundra, Device 17, to get it right.
 135          */
 136         {
 137                 u8 header_type;
 138
 139                 pci_hose_read_config_byte(hose,
 140                                           PCI_BDF(0,17,0),
 141                                           PCI_HEADER_TYPE,
 142                                           &header_type);
 143         }
 144 #endif
 145
 146         hose->last_busno = pci_hose_scan(hose);
 147
 148 #ifdef CONFIG_MPC85XX_PCI2
 149         hose = &pci_hose[1];
 150
 151         hose->first_busno = pci_hose[0].last_busno + 1;
 152         hose->last_busno = 0xff;
 153
 154         pci_setup_indirect(hose,
 155                            (CFG_IMMR+0x9000),
 156                            (CFG_IMMR+0x9004));
 157
 158         dev = PCI_BDF(hose->first_busno, 0, 0);
 159         pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
 160         reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
 161         pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
 162
 163         /*
 164          * Clear non-reserved bits in status register.
 165          */
 166         pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
 167
 168         pcix2->potar1   = (CFG_PCI2_MEM_BASE >> 12) & 0x000fffff;
 169         pcix2->potear1  = 0x00000000;
 170         pcix2->powbar1  = (CFG_PCI2_MEM_PHYS >> 12) & 0x000fffff;
 171         pcix2->powbear1 = 0x00000000;
 172         pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
 173                         POWAR_MEM_WRITE | POWAR_MEM_512M);
 174
 175         pcix2->potar2  = (CFG_PCI2_IO_BASE >> 12) & 0x000fffff;
 176         pcix2->potear2  = 0x00000000;
 177         pcix2->powbar2  = (CFG_PCI2_IO_PHYS >> 12) & 0x000fffff;
 178         pcix2->powbear2 = 0x00000000;
 179         pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
 180                         POWAR_IO_WRITE | POWAR_IO_1M);
 181
 182         pcix2->pitar1 = 0x00000000;
 183         pcix2->piwbar1 = 0x00000000;
 184         pcix2->piwar1 = (PIWAR_EN | PIWAR_PF | PIWAR_LOCAL |
 185                         PIWAR_READ_SNOOP | PIWAR_WRITE_SNOOP | PIWAR_MEM_2G);
 186
 187         pcix2->powar3 = 0;
 188         pcix2->powar4 = 0;
 189         pcix2->piwar2 = 0;
 190         pcix2->piwar3 = 0;
 191
 192         pci_set_region(hose->regions + 0,
 193                        CFG_PCI2_MEM_BASE,
 194                        CFG_PCI2_MEM_PHYS,
 195                        CFG_PCI2_MEM_SIZE,
 196                        PCI_REGION_MEM);
 197
 198         pci_set_region(hose->regions + 1,
 199                        CFG_PCI2_IO_BASE,
 200                        CFG_PCI2_IO_PHYS,
 201                        CFG_PCI2_IO_SIZE,
 202                        PCI_REGION_IO);
 203
 204         hose->region_count = 2;
 205
 206         /*
 207          * Hose scan.
 208          */
 209         pci_register_hose(hose);
 210
 211         hose->last_busno = pci_hose_scan(hose);
 212 #endif
 213 }
 214
 215 #ifdef CONFIG_OF_FLAT_TREE
 216 void
 217 ft_pci_setup(void *blob, bd_t *bd)
 218 {
 219         u32 *p;
 220         int len;
 221
 222         p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@8000/bus-range", &len);
 223         if (p != NULL) {
 224                 p[0] = pci_hose[0].first_busno;
 225                 p[1] = pci_hose[0].last_busno;
 226         }
 227
 228 #ifdef CONFIG_MPC85XX_PCI2
 229         p = (u32 *)ft_get_prop(blob, "/" OF_SOC "/pci@9000/bus-range", &len);
 230         if (p != NULL) {
 231                 p[0] = pci_hose[1].first_busno;
 232                 p[1] = pci_hose[1].last_busno;
 233         }
 234 #endif
 235 }
 236 #endif /* CONFIG_OF_FLAT_TREE */
 237 #endif /* CONFIG_PCI */