arch/powerpc/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  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 /*
  10  * PCI Configuration space access support for MPC85xx PCI Bridge
  11  */
  12 #include <common.h>
  13 #include <asm/cpm_85xx.h>
  14 #include <pci.h>
  15
  16 #if !defined(CONFIG_FSL_PCI_INIT)
  17
  18 #ifndef CONFIG_SYS_PCI1_MEM_BUS
  19 #define CONFIG_SYS_PCI1_MEM_BUS CONFIG_SYS_PCI1_MEM_BASE
  20 #endif
  21
  22 #ifndef CONFIG_SYS_PCI1_IO_BUS
  23 #define CONFIG_SYS_PCI1_IO_BUS CONFIG_SYS_PCI1_IO_BASE
  24 #endif
  25
  26 #ifndef CONFIG_SYS_PCI2_MEM_BUS
  27 #define CONFIG_SYS_PCI2_MEM_BUS CONFIG_SYS_PCI2_MEM_BASE
  28 #endif
  29
  30 #ifndef CONFIG_SYS_PCI2_IO_BUS
  31 #define CONFIG_SYS_PCI2_IO_BUS CONFIG_SYS_PCI2_IO_BASE
  32 #endif
  33
  34 static struct pci_controller *pci_hose;
  35
  36 void
  37 pci_mpc85xx_init(struct pci_controller *board_hose)
  38 {
  39         u16 reg16;
  40         u32 dev;
  41
  42         volatile ccsr_pcix_t *pcix = (void *)(CONFIG_SYS_MPC85xx_PCIX_ADDR);
  43 #ifdef CONFIG_MPC85XX_PCI2
  44         volatile ccsr_pcix_t *pcix2 = (void *)(CONFIG_SYS_MPC85xx_PCIX2_ADDR);
  45 #endif
  46         volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
  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                            (CONFIG_SYS_IMMR+0x8000),
  58                            (CONFIG_SYS_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 & MPC85xx_PORDEVSR_PCI1)) {
  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   = (CONFIG_SYS_PCI1_MEM_BUS >> 12) & 0x000fffff;
  84         pcix->potear1  = 0x00000000;
  85         pcix->powbar1  = (CONFIG_SYS_PCI1_MEM_PHYS >> 12) & 0x000fffff;
  86         pcix->powbear1 = 0x00000000;
  87         pcix->powar1 = (POWAR_EN | POWAR_MEM_READ |
  88                         POWAR_MEM_WRITE | (__ilog2(CONFIG_SYS_PCI1_MEM_SIZE) - 1));
  89
  90         pcix->potar2  = (CONFIG_SYS_PCI1_IO_BUS >> 12) & 0x000fffff;
  91         pcix->potear2  = 0x00000000;
  92         pcix->powbar2  = (CONFIG_SYS_PCI1_IO_PHYS >> 12) & 0x000fffff;
  93         pcix->powbear2 = 0x00000000;
  94         pcix->powar2 = (POWAR_EN | POWAR_IO_READ |
  95                         POWAR_IO_WRITE | (__ilog2(CONFIG_SYS_PCI1_IO_SIZE) - 1));
  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                        CONFIG_SYS_PCI1_MEM_BUS,
 109                        CONFIG_SYS_PCI1_MEM_PHYS,
 110                        CONFIG_SYS_PCI1_MEM_SIZE,
 111                        PCI_REGION_MEM);
 112
 113         pci_set_region(hose->regions + 1,
 114                        CONFIG_SYS_PCI1_IO_BUS,
 115                        CONFIG_SYS_PCI1_IO_PHYS,
 116                        CONFIG_SYS_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,BRIDGE_ID,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                            (CONFIG_SYS_IMMR+0x9000),
 156                            (CONFIG_SYS_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   = (CONFIG_SYS_PCI2_MEM_BUS >> 12) & 0x000fffff;
 169         pcix2->potear1  = 0x00000000;
 170         pcix2->powbar1  = (CONFIG_SYS_PCI2_MEM_PHYS >> 12) & 0x000fffff;
 171         pcix2->powbear1 = 0x00000000;
 172         pcix2->powar1 = (POWAR_EN | POWAR_MEM_READ |
 173                         POWAR_MEM_WRITE | (__ilog2(CONFIG_SYS_PCI2_MEM_SIZE) - 1));
 174
 175         pcix2->potar2  = (CONFIG_SYS_PCI2_IO_BUS >> 12) & 0x000fffff;
 176         pcix2->potear2  = 0x00000000;
 177         pcix2->powbar2  = (CONFIG_SYS_PCI2_IO_PHYS >> 12) & 0x000fffff;
 178         pcix2->powbear2 = 0x00000000;
 179         pcix2->powar2 = (POWAR_EN | POWAR_IO_READ |
 180                         POWAR_IO_WRITE | (__ilog2(CONFIG_SYS_PCI2_IO_SIZE) - 1));
 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                        CONFIG_SYS_PCI2_MEM_BUS,
 194                        CONFIG_SYS_PCI2_MEM_PHYS,
 195                        CONFIG_SYS_PCI2_MEM_SIZE,
 196                        PCI_REGION_MEM);
 197
 198         pci_set_region(hose->regions + 1,
 199                        CONFIG_SYS_PCI2_IO_BUS,
 200                        CONFIG_SYS_PCI2_IO_PHYS,
 201                        CONFIG_SYS_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 #endif /* !CONFIG_FSL_PCI_INIT */