cpu/mcf547x_8x/pci.c

   1 /*
   2  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   3  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * PCI Configuration space access support
  26  */
  27 #include <common.h>
  28 #include <pci.h>
  29 #include <asm/io.h>
  30 #include <asm/immap.h>
  31
  32 #if defined(CONFIG_PCI)
  33 /* System RAM mapped over PCI */
  34 #define CFG_PCI_SYS_MEM_BUS     CFG_SDRAM_BASE
  35 #define CFG_PCI_SYS_MEM_PHYS    CFG_SDRAM_BASE
  36 #define CFG_PCI_SYS_MEM_SIZE    (1024 * 1024 * 1024)
  37
  38 #define cfg_read(val, addr, type, op)           *val = op((type)(addr));
  39 #define cfg_write(val, addr, type, op)          op((type *)(addr), (val));
  40
  41 #define PCI_OP(rw, size, type, op, mask)                                \
  42 int pci_##rw##_cfg_##size(struct pci_controller *hose,                  \
  43         pci_dev_t dev, int offset, type val)                            \
  44 {                                                                       \
  45         u32 addr = 0;                                                   \
  46         u16 cfg_type = 0;                                               \
  47         addr = ((offset & 0xfc) | cfg_type | (dev)  | 0x80000000);      \
  48         out_be32(hose->cfg_addr, addr);                                 \
  49         cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);      \
  50         __asm__ __volatile__("nop");                                    \
  51         __asm__ __volatile__("nop");                                    \
  52         out_be32(hose->cfg_addr, addr & 0x7fffffff);                    \
  53         return 0;                                                       \
  54 }
  55
  56 PCI_OP(read, byte, u8 *, in_8, 3)
  57 PCI_OP(read, word, u16 *, in_le16, 2)
  58 PCI_OP(write, byte, u8, out_8, 3)
  59 PCI_OP(write, word, u16, out_le16, 2)
  60 PCI_OP(write, dword, u32, out_le32, 0)
  61
  62 int pci_read_cfg_dword(struct pci_controller *hose, pci_dev_t dev,
  63                        int offset, u32 * val)
  64 {
  65         u32 addr;
  66         u32 tmpv;
  67         u32 mask = 2;           /* word access */
  68         /* Read lower 16 bits */
  69         addr = ((offset & 0xfc) | (dev) | 0x80000000);
  70         out_be32(hose->cfg_addr, addr);
  71         *val = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
  72         __asm__ __volatile__("nop");
  73         out_be32(hose->cfg_addr, addr & 0x7fffffff);
  74
  75         /* Read upper 16 bits */
  76         offset += 2;
  77         addr = ((offset & 0xfc) | 1 | (dev) | 0x80000000);
  78         out_be32(hose->cfg_addr, addr);
  79         tmpv = (u32) in_le16((u16 *) (hose->cfg_data + (offset & mask)));
  80         __asm__ __volatile__("nop");
  81         out_be32(hose->cfg_addr, addr & 0x7fffffff);
  82
  83         /* combine results into dword value */
  84         *val = (tmpv << 16) | *val;
  85
  86         return 0;
  87 }
  88
  89 void pci_mcf547x_8x_init(struct pci_controller *hose)
  90 {
  91         volatile pci_t *pci = (volatile pci_t *) MMAP_PCI;
  92         volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO;
  93
  94         /* Port configuration */
  95         gpio->par_pcibg =
  96             GPIO_PAR_PCIBG_PCIBG0(3) | GPIO_PAR_PCIBG_PCIBG1(3) |
  97             GPIO_PAR_PCIBG_PCIBG2(3) | GPIO_PAR_PCIBG_PCIBG3(3) |
  98             GPIO_PAR_PCIBG_PCIBG4(3);
  99         gpio->par_pcibr =
 100             GPIO_PAR_PCIBR_PCIBR0(3) | GPIO_PAR_PCIBR_PCIBR1(3) |
 101             GPIO_PAR_PCIBR_PCIBR2(3) | GPIO_PAR_PCIBR_PCIBR3(3) |
 102             GPIO_PAR_PCIBR_PCIBR4(3);
 103
 104         /* Assert reset bit */
 105         pci->gscr |= PCI_GSCR_PR;
 106
 107         pci->tcr1 = PCI_TCR1_P;
 108
 109         /* Initiator windows */
 110         pci->iw0btar = CFG_PCI_MEM_PHYS | (CFG_PCI_MEM_PHYS >> 16);
 111         pci->iw1btar = CFG_PCI_IO_PHYS | (CFG_PCI_IO_PHYS >> 16);
 112         pci->iw2btar = CFG_PCI_CFG_PHYS | (CFG_PCI_CFG_PHYS >> 16);
 113
 114         pci->iwcr =
 115             PCI_IWCR_W0C_EN | PCI_IWCR_W1C_EN | PCI_IWCR_W1C_IO |
 116             PCI_IWCR_W2C_EN | PCI_IWCR_W2C_IO;
 117
 118         pci->icr = 0;
 119
 120         /* Enable bus master and mem access */
 121         pci->scr = PCI_SCR_B | PCI_SCR_M;
 122
 123         /* Cache line size and master latency */
 124         pci->cr1 = PCI_CR1_CLS(8) | PCI_CR1_LTMR(0xF8);
 125         pci->cr2 = 0;
 126
 127 #ifdef CFG_PCI_BAR0
 128         pci->bar0 = PCI_BAR_BAR0(CFG_PCI_BAR0);
 129         pci->tbatr0a = CFG_PCI_TBATR0 | PCI_TBATR_EN;
 130 #endif
 131 #ifdef CFG_PCI_BAR1
 132         pci->bar1 = PCI_BAR_BAR1(CFG_PCI_BAR1);
 133         pci->tbatr1a = CFG_PCI_TBATR1 | PCI_TBATR_EN;
 134 #endif
 135
 136         /* Deassert reset bit */
 137         pci->gscr &= ~PCI_GSCR_PR;
 138         udelay(1000);
 139
 140         /* Enable PCI bus master support */
 141         hose->first_busno = 0;
 142         hose->last_busno = 0xff;
 143
 144         pci_set_region(hose->regions + 0, CFG_PCI_MEM_BUS, CFG_PCI_MEM_PHYS,
 145                        CFG_PCI_MEM_SIZE, PCI_REGION_MEM);
 146
 147         pci_set_region(hose->regions + 1, CFG_PCI_IO_BUS, CFG_PCI_IO_PHYS,
 148                        CFG_PCI_IO_SIZE, PCI_REGION_IO);
 149
 150         pci_set_region(hose->regions + 2, CFG_PCI_SYS_MEM_BUS,
 151                        CFG_PCI_SYS_MEM_PHYS, CFG_PCI_SYS_MEM_SIZE,
 152                        PCI_REGION_MEM | PCI_REGION_MEMORY);
 153
 154         hose->region_count = 3;
 155
 156         hose->cfg_addr = &(pci->car);
 157         hose->cfg_data = (volatile unsigned char *)CFG_PCI_CFG_BUS;
 158
 159         pci_set_ops(hose, pci_read_cfg_byte, pci_read_cfg_word,
 160                     pci_read_cfg_dword, pci_write_cfg_byte, pci_write_cfg_word,
 161                     pci_write_cfg_dword);
 162
 163         /* Hose scan */
 164         pci_register_hose(hose);
 165         hose->last_busno = pci_hose_scan(hose);
 166 }
 167 #endif                          /* CONFIG_PCI */