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uboot-mt623x/board/freescale/mpc832xemds/pci.c

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/*
* Copyright (C) 2006 Freescale Semiconductor, Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*/
/*
* PCI Configuration space access support for MPC83xx PCI Bridge
*/
#include <asm/mmu.h>
#include <asm/io.h>
#include <common.h>
#include <pci.h>
#include <i2c.h>
#if defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#include <fdt_support.h>
#endif
#include <asm/fsl_i2c.h>
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_PCI)
#define PCI_FUNCTION_CONFIG 0x44
#define PCI_FUNCTION_CFG_LOCK 0x20
/*
* Initialize PCI Devices, report devices found
*/
#ifndef CONFIG_PCI_PNP
static struct pci_config_table pci_mpc83xxemds_config_table[] = {
{
PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
pci_cfgfunc_config_device,
{PCI_ENET0_IOADDR,
PCI_ENET0_MEMADDR,
PCI_COMMON_MEMORY | PCI_COMMAND_MASTER}
},
{}
}
#endif
static struct pci_controller hose[] = {
{
#ifndef CONFIG_PCI_PNP
config_table:pci_mpc83xxemds_config_table,
#endif
},
};
/**********************************************************************
* pci_init_board()
*********************************************************************/
void pci_init_board(void)
#ifdef CONFIG_PCISLAVE
{
u16 reg16;
volatile immap_t *immr;
volatile law83xx_t *pci_law;
volatile pot83xx_t *pci_pot;
volatile pcictrl83xx_t *pci_ctrl;
volatile pciconf83xx_t *pci_conf;
immr = (immap_t *) CONFIG_SYS_IMMR;
pci_law = immr->sysconf.pcilaw;
pci_pot = immr->ios.pot;
pci_ctrl = immr->pci_ctrl;
pci_conf = immr->pci_conf;
/*
* Configure PCI Inbound Translation Windows
*/
pci_ctrl[0].pitar0 = 0x0;
pci_ctrl[0].pibar0 = 0x0;
pci_ctrl[0].piwar0 = PIWAR_EN | PIWAR_RTT_SNOOP |
PIWAR_WTT_SNOOP | PIWAR_IWS_4K;
pci_ctrl[0].pitar1 = 0x0;
pci_ctrl[0].pibar1 = 0x0;
pci_ctrl[0].piebar1 = 0x0;
pci_ctrl[0].piwar1 &= ~PIWAR_EN;
pci_ctrl[0].pitar2 = 0x0;
pci_ctrl[0].pibar2 = 0x0;
pci_ctrl[0].piebar2 = 0x0;
pci_ctrl[0].piwar2 &= ~PIWAR_EN;
hose[0].first_busno = 0;
hose[0].last_busno = 0xff;
pci_setup_indirect(&hose[0],
(CONFIG_SYS_IMMR + 0x8300), (CONFIG_SYS_IMMR + 0x8304));
reg16 = 0xff;
pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
PCI_COMMAND, &reg16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
PCI_STATUS, 0xffff);
pci_hose_write_config_byte(&hose[0], PCI_BDF(0, 0, 0),
PCI_LATENCY_TIMER, 0x80);
/*
* Unlock configuration lock in PCI function configuration register.
*/
pci_hose_read_config_word(&hose[0], PCI_BDF(0, 0, 0),
PCI_FUNCTION_CONFIG, &reg16);
reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
pci_hose_write_config_word(&hose[0], PCI_BDF(0, 0, 0),
PCI_FUNCTION_CONFIG, reg16);
printf("Enabled PCI 32bit Agent Mode\n");
}
#else
{
volatile immap_t *immr;
volatile clk83xx_t *clk;
volatile law83xx_t *pci_law;
volatile pot83xx_t *pci_pot;
volatile pcictrl83xx_t *pci_ctrl;
volatile pciconf83xx_t *pci_conf;
u16 reg16;
u32 val32;
u32 dev;
immr = (immap_t *) CONFIG_SYS_IMMR;
clk = (clk83xx_t *) & immr->clk;
pci_law = immr->sysconf.pcilaw;
pci_pot = immr->ios.pot;
pci_ctrl = immr->pci_ctrl;
pci_conf = immr->pci_conf;
/*
* Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
*/
val32 = clk->occr;
udelay(2000);
#if defined(PCI_66M)
clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
printf("PCI clock is 66MHz\n");
#elif defined(PCI_33M)
clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2 |
OCCR_PCICD0 | OCCR_PCICD1 | OCCR_PCICD2 | OCCR_PCICR;
printf("PCI clock is 33MHz\n");
#else
clk->occr = OCCR_PCICOE0 | OCCR_PCICOE1 | OCCR_PCICOE2;
printf("PCI clock is 66MHz\n");
#endif
udelay(2000);
/*
* Configure PCI Local Access Windows
*/
pci_law[0].bar = CONFIG_SYS_PCI_MEM_PHYS & LAWBAR_BAR;
pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_512M;
pci_law[1].bar = CONFIG_SYS_PCI_IO_PHYS & LAWBAR_BAR;
pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_1M;
/*
* Configure PCI Outbound Translation Windows
*/
/* PCI mem space - prefetch */
pci_pot[0].potar = (CONFIG_SYS_PCI_MEM_BASE >> 12) & POTAR_TA_MASK;
pci_pot[0].pobar = (CONFIG_SYS_PCI_MEM_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[0].pocmr =
POCMR_EN | POCMR_SE | (POCMR_CM_256M & POCMR_CM_MASK);
/* PCI mmio - non-prefetch mem space */
pci_pot[1].potar = (CONFIG_SYS_PCI_MMIO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[1].pobar = (CONFIG_SYS_PCI_MMIO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[1].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
/* PCI IO space */
pci_pot[2].potar = (CONFIG_SYS_PCI_IO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[2].pobar = (CONFIG_SYS_PCI_IO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[2].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
/*
* Configure PCI Inbound Translation Windows
*/
pci_ctrl[0].pitar1 = (CONFIG_SYS_PCI_SLV_MEM_LOCAL >> 12) & PITAR_TA_MASK;
pci_ctrl[0].pibar1 = (CONFIG_SYS_PCI_SLV_MEM_BUS >> 12) & PIBAR_MASK;
pci_ctrl[0].piebar1 = 0x0;
pci_ctrl[0].piwar1 =
PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP |
PIWAR_IWS_2G;
/*
* Release PCI RST Output signal
*/
udelay(2000);
pci_ctrl[0].gcr = 1;
udelay(2000);
hose[0].first_busno = 0;
hose[0].last_busno = 0xff;
/* PCI memory prefetch space */
pci_set_region(hose[0].regions + 0,
CONFIG_SYS_PCI_MEM_BASE,
CONFIG_SYS_PCI_MEM_PHYS,
CONFIG_SYS_PCI_MEM_SIZE, PCI_REGION_MEM | PCI_REGION_PREFETCH);
/* PCI memory space */
pci_set_region(hose[0].regions + 1,
CONFIG_SYS_PCI_MMIO_BASE,
CONFIG_SYS_PCI_MMIO_PHYS, CONFIG_SYS_PCI_MMIO_SIZE, PCI_REGION_MEM);
/* PCI IO space */
pci_set_region(hose[0].regions + 2,
CONFIG_SYS_PCI_IO_BASE,
CONFIG_SYS_PCI_IO_PHYS, CONFIG_SYS_PCI_IO_SIZE, PCI_REGION_IO);
/* System memory space */
pci_set_region(hose[0].regions + 3,
CONFIG_SYS_PCI_SLV_MEM_LOCAL,
CONFIG_SYS_PCI_SLV_MEM_BUS,
CONFIG_SYS_PCI_SLV_MEM_SIZE,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
hose[0].region_count = 4;
pci_setup_indirect(&hose[0],
(CONFIG_SYS_IMMR + 0x8300), (CONFIG_SYS_IMMR + 0x8304));
pci_register_hose(hose);
/*
* Write command register
*/
reg16 = 0xff;
dev = PCI_BDF(0, 0, 0);
pci_hose_read_config_word(&hose[0], dev, PCI_COMMAND, &reg16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(&hose[0], dev, PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(&hose[0], dev, PCI_STATUS, 0xffff);
pci_hose_write_config_byte(&hose[0], dev, PCI_LATENCY_TIMER, 0x80);
pci_hose_write_config_byte(&hose[0], dev, PCI_CACHE_LINE_SIZE, 0x08);
/*
* Hose scan.
*/
hose->last_busno = pci_hose_scan(hose);
}
#endif /* CONFIG_PCISLAVE */
#if defined(CONFIG_OF_LIBFDT)
void ft_pci_setup(void *blob, bd_t *bd)
{
int nodeoffset;
int tmp[2];
const char *path;
nodeoffset = fdt_path_offset(blob, "/aliases");
if (nodeoffset >= 0) {
path = fdt_getprop(blob, nodeoffset, "pci0", NULL);
if (path) {
tmp[0] = cpu_to_be32(hose[0].first_busno);
tmp[1] = cpu_to_be32(hose[0].last_busno);
do_fixup_by_path(blob, path, "bus-range",
&tmp, sizeof(tmp), 1);
tmp[0] = cpu_to_be32(gd->pci_clk);
do_fixup_by_path(blob, path, "clock-frequency",
&tmp, sizeof(tmp[0]), 1);
}
}
}
#endif /* CONFIG_OF_LIBFDT */
#endif /* CONFIG_PCI */
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