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/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#if defined(CONFIG_PCI)
#include <asm/processor.h>
#include <asm/io.h>
#include <pci.h>
#include <mpc5xxx.h>
/* System RAM mapped over PCI */
#define CONFIG_PCI_MEMORY_BUS CONFIG_SYS_SDRAM_BASE
#define CONFIG_PCI_MEMORY_PHYS CONFIG_SYS_SDRAM_BASE
#define CONFIG_PCI_MEMORY_SIZE (1024 * 1024 * 1024)
/* PCIIWCR bit fields */
#define IWCR_MEM (0 << 3)
#define IWCR_IO (1 << 3)
#define IWCR_READ (0 << 1)
#define IWCR_READLINE (1 << 1)
#define IWCR_READMULT (2 << 1)
#define IWCR_EN (1 << 0)
static int mpc5200_read_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32* value)
{
*(volatile u32 *)MPC5XXX_PCI_CAR = (1 << 31) | dev | offset;
eieio();
udelay(10);
*value = in_le32((volatile u32 *)CONFIG_PCI_IO_PHYS);
eieio();
*(volatile u32 *)MPC5XXX_PCI_CAR = 0;
udelay(10);
return 0;
}
static int mpc5200_write_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32 value)
{
*(volatile u32 *)MPC5XXX_PCI_CAR = (1 << 31) | dev | offset;
eieio();
udelay(10);
out_le32((volatile u32 *)CONFIG_PCI_IO_PHYS, value);
eieio();
*(volatile u32 *)MPC5XXX_PCI_CAR = 0;
udelay(10);
return 0;
}
void pci_mpc5xxx_init (struct pci_controller *hose)
{
hose->first_busno = 0;
hose->last_busno = 0xff;
/* System space */
pci_set_region(hose->regions + 0,
CONFIG_PCI_MEMORY_BUS,
CONFIG_PCI_MEMORY_PHYS,
CONFIG_PCI_MEMORY_SIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
/* PCI memory space */
pci_set_region(hose->regions + 1,
CONFIG_PCI_MEM_BUS,
CONFIG_PCI_MEM_PHYS,
CONFIG_PCI_MEM_SIZE,
PCI_REGION_MEM);
/* PCI IO space */
pci_set_region(hose->regions + 2,
CONFIG_PCI_IO_BUS,
CONFIG_PCI_IO_PHYS,
CONFIG_PCI_IO_SIZE,
PCI_REGION_IO);
hose->region_count = 3;
pci_register_hose(hose);
/* GPIO Multiplexing - enable PCI */
*(vu_long *)MPC5XXX_GPS_PORT_CONFIG &= ~(1 << 15);
/* Set host bridge as pci master and enable memory decoding */
*(vu_long *)MPC5XXX_PCI_CMD |=
PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
/* Set maximum latency timer */
*(vu_long *)MPC5XXX_PCI_CFG |= (0xf800);
/* Set cache line size */
*(vu_long *)MPC5XXX_PCI_CFG = (*(vu_long *)MPC5XXX_PCI_CFG & ~0xff) |
(CONFIG_SYS_CACHELINE_SIZE / 4);
/* Map MBAR to PCI space */
*(vu_long *)MPC5XXX_PCI_BAR0 = CONFIG_SYS_MBAR;
*(vu_long *)MPC5XXX_PCI_TBATR0 = CONFIG_SYS_MBAR | 1;
/* Map RAM to PCI space */
*(vu_long *)MPC5XXX_PCI_BAR1 = CONFIG_PCI_MEMORY_BUS | (1 << 3);
*(vu_long *)MPC5XXX_PCI_TBATR1 = CONFIG_PCI_MEMORY_PHYS | 1;
/* Park XLB on PCI */
*(vu_long *)(MPC5XXX_XLBARB + 0x40) &= ~((7 << 8) | (3 << 5));
*(vu_long *)(MPC5XXX_XLBARB + 0x40) |= (3 << 8) | (3 << 5);
/* Disable interrupts from PCI controller */
*(vu_long *)MPC5XXX_PCI_GSCR &= ~(7 << 12);
*(vu_long *)MPC5XXX_PCI_ICR &= ~(7 << 24);
/* Set PCI retry counter to 0 = infinite retry. */
/* The default of 255 is too short for slow devices. */
*(vu_long *)MPC5XXX_PCI_ICR &= 0xFFFFFF00;
/* Disable initiator windows */
*(vu_long *)MPC5XXX_PCI_IWCR = 0;
/* Map PCI memory to physical space */
*(vu_long *)MPC5XXX_PCI_IW0BTAR = CONFIG_PCI_MEM_PHYS |
(((CONFIG_PCI_MEM_SIZE - 1) >> 8) & 0x00ff0000) |
(CONFIG_PCI_MEM_BUS >> 16);
*(vu_long *)MPC5XXX_PCI_IWCR |= (IWCR_MEM | IWCR_READ | IWCR_EN) << 24;
/* Map PCI I/O to physical space */
*(vu_long *)MPC5XXX_PCI_IW1BTAR = CONFIG_PCI_IO_PHYS |
(((CONFIG_PCI_IO_SIZE - 1) >> 8) & 0x00ff0000) |
(CONFIG_PCI_IO_BUS >> 16);
*(vu_long *)MPC5XXX_PCI_IWCR |= (IWCR_IO | IWCR_READ | IWCR_EN) << 16;
/* Reset the PCI bus */
*(vu_long *)MPC5XXX_PCI_GSCR |= 1;
udelay(1000);
*(vu_long *)MPC5XXX_PCI_GSCR &= ~1;
udelay(1000);
pci_set_ops(hose,
pci_hose_read_config_byte_via_dword,
pci_hose_read_config_word_via_dword,
mpc5200_read_config_dword,
pci_hose_write_config_byte_via_dword,
pci_hose_write_config_word_via_dword,
mpc5200_write_config_dword);
udelay(1000);
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
hose->last_busno = pci_hose_scan(hose);
}
#endif /* CONFIG_PCI */
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