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u-boot/board/sbc8349/pci.c
Kumar Gala ff4e66e93c pci: Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY for clarity 
The PCI_REGION_MEMORY and PCI_REGION_MEM are a bit to similar and
can be confusing when reading the code.

Rename PCI_REGION_MEMORY to PCI_REGION_SYS_MEMORY to clarify its used
for system memory mapping purposes.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2009-02-07 23:50:04 +01:00

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/*
* pci.c -- WindRiver SBC8349 PCI board support.
* Copyright (c) 2006 Wind River Systems, Inc.
*
* Based on MPC8349 PCI support but w/o PIB related code.
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
#include <asm/mmu.h>
#include <common.h>
#include <asm/global_data.h>
#include <pci.h>
#include <asm/mpc8349_pci.h>
#include <i2c.h>
#if defined(CONFIG_OF_LIBFDT)
#include <libfdt.h>
#include <fdt_support.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_PCI
/* System RAM mapped to PCI space */
#define CONFIG_PCI_SYS_MEM_BUS CONFIG_SYS_SDRAM_BASE
#define CONFIG_PCI_SYS_MEM_PHYS CONFIG_SYS_SDRAM_BASE
#ifndef CONFIG_PCI_PNP
static struct pci_config_table pci_mpc8349emds_config_table[] = {
{PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
PCI_IDSEL_NUMBER, PCI_ANY_ID,
pci_cfgfunc_config_device, {PCI_ENET0_IOADDR,
PCI_ENET0_MEMADDR,
PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER
}
},
{}
};
#endif
static struct pci_controller pci_hose[] = {
{
#ifndef CONFIG_PCI_PNP
config_table:pci_mpc8349emds_config_table,
#endif
},
{
#ifndef CONFIG_PCI_PNP
config_table:pci_mpc8349emds_config_table,
#endif
}
};
/**************************************************************************
* pci_init_board()
*
* NOTICE: PCI2 is not supported. There is only one
* physical PCI slot on the board.
*
*/
void
pci_init_board(void)
{
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 reg32;
u32 dev;
struct pci_controller * hose;
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;
hose = &pci_hose[0];
/*
* Configure PCI controller and PCI_CLK_OUTPUT both in 66M mode
*/
reg32 = clk->occr;
udelay(2000);
clk->occr = 0xff000000;
udelay(2000);
/*
* Release PCI RST Output signal
*/
pci_ctrl[0].gcr = 0;
udelay(2000);
pci_ctrl[0].gcr = 1;
#ifdef CONFIG_MPC83XX_PCI2
pci_ctrl[1].gcr = 0;
udelay(2000);
pci_ctrl[1].gcr = 1;
#endif
/* We need to wait at least a 1sec based on PCI specs */
{
int i;
for (i = 0; i < 1000; ++i)
udelay (1000);
}
/*
* Configure PCI Local Access Windows
*/
pci_law[0].bar = CONFIG_SYS_PCI1_MEM_PHYS & LAWBAR_BAR;
pci_law[0].ar = LAWAR_EN | LAWAR_SIZE_1G;
pci_law[1].bar = CONFIG_SYS_PCI1_IO_PHYS & LAWBAR_BAR;
pci_law[1].ar = LAWAR_EN | LAWAR_SIZE_4M;
/*
* Configure PCI Outbound Translation Windows
*/
/* PCI1 mem space - prefetch */
pci_pot[0].potar = (CONFIG_SYS_PCI1_MEM_BASE >> 12) & POTAR_TA_MASK;
pci_pot[0].pobar = (CONFIG_SYS_PCI1_MEM_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[0].pocmr = POCMR_EN | POCMR_PREFETCH_EN | (POCMR_CM_256M & POCMR_CM_MASK);
/* PCI1 IO space */
pci_pot[1].potar = (CONFIG_SYS_PCI1_IO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[1].pobar = (CONFIG_SYS_PCI1_IO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[1].pocmr = POCMR_EN | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
/* PCI1 mmio - non-prefetch mem space */
pci_pot[2].potar = (CONFIG_SYS_PCI1_MMIO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[2].pobar = (CONFIG_SYS_PCI1_MMIO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[2].pocmr = POCMR_EN | (POCMR_CM_256M & POCMR_CM_MASK);
/*
* Configure PCI Inbound Translation Windows
*/
/* we need RAM mapped to PCI space for the devices to
* access main memory */
pci_ctrl[0].pitar1 = 0x0;
pci_ctrl[0].pibar1 = 0x0;
pci_ctrl[0].piebar1 = 0x0;
pci_ctrl[0].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1);
hose->first_busno = 0;
hose->last_busno = 0xff;
/* PCI memory prefetch space */
pci_set_region(hose->regions + 0,
CONFIG_SYS_PCI1_MEM_BASE,
CONFIG_SYS_PCI1_MEM_PHYS,
CONFIG_SYS_PCI1_MEM_SIZE,
PCI_REGION_MEM|PCI_REGION_PREFETCH);
/* PCI memory space */
pci_set_region(hose->regions + 1,
CONFIG_SYS_PCI1_MMIO_BASE,
CONFIG_SYS_PCI1_MMIO_PHYS,
CONFIG_SYS_PCI1_MMIO_SIZE,
PCI_REGION_MEM);
/* PCI IO space */
pci_set_region(hose->regions + 2,
CONFIG_SYS_PCI1_IO_BASE,
CONFIG_SYS_PCI1_IO_PHYS,
CONFIG_SYS_PCI1_IO_SIZE,
PCI_REGION_IO);
/* System memory space */
pci_set_region(hose->regions + 3,
CONFIG_PCI_SYS_MEM_BUS,
CONFIG_PCI_SYS_MEM_PHYS,
gd->ram_size,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
hose->region_count = 4;
pci_setup_indirect(hose,
(CONFIG_SYS_IMMR+0x8300),
(CONFIG_SYS_IMMR+0x8304));
pci_register_hose(hose);
/*
* Write to Command register
*/
reg16 = 0xff;
dev = PCI_BDF(hose->first_busno, 0, 0);
pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
#ifdef CONFIG_PCI_SCAN_SHOW
printf("PCI: Bus Dev VenId DevId Class Int\n");
#endif
/*
* Hose scan.
*/
hose->last_busno = pci_hose_scan(hose);
#ifdef CONFIG_MPC83XX_PCI2
hose = &pci_hose[1];
/*
* Configure PCI Outbound Translation Windows
*/
/* PCI2 mem space - prefetch */
pci_pot[3].potar = (CONFIG_SYS_PCI2_MEM_BASE >> 12) & POTAR_TA_MASK;
pci_pot[3].pobar = (CONFIG_SYS_PCI2_MEM_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[3].pocmr = POCMR_EN | POCMR_PCI2 | POCMR_PREFETCH_EN | (POCMR_CM_256M & POCMR_CM_MASK);
/* PCI2 IO space */
pci_pot[4].potar = (CONFIG_SYS_PCI2_IO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[4].pobar = (CONFIG_SYS_PCI2_IO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[4].pocmr = POCMR_EN | POCMR_PCI2 | POCMR_IO | (POCMR_CM_1M & POCMR_CM_MASK);
/* PCI2 mmio - non-prefetch mem space */
pci_pot[5].potar = (CONFIG_SYS_PCI2_MMIO_BASE >> 12) & POTAR_TA_MASK;
pci_pot[5].pobar = (CONFIG_SYS_PCI2_MMIO_PHYS >> 12) & POBAR_BA_MASK;
pci_pot[5].pocmr = POCMR_EN | POCMR_PCI2 | (POCMR_CM_256M & POCMR_CM_MASK);
/*
* Configure PCI Inbound Translation Windows
*/
/* we need RAM mapped to PCI space for the devices to
* access main memory */
pci_ctrl[1].pitar1 = 0x0;
pci_ctrl[1].pibar1 = 0x0;
pci_ctrl[1].piebar1 = 0x0;
pci_ctrl[1].piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP | PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size) - 1);
hose->first_busno = pci_hose[0].last_busno + 1;
hose->last_busno = 0xff;
/* PCI memory prefetch space */
pci_set_region(hose->regions + 0,
CONFIG_SYS_PCI2_MEM_BASE,
CONFIG_SYS_PCI2_MEM_PHYS,
CONFIG_SYS_PCI2_MEM_SIZE,
PCI_REGION_MEM|PCI_REGION_PREFETCH);
/* PCI memory space */
pci_set_region(hose->regions + 1,
CONFIG_SYS_PCI2_MMIO_BASE,
CONFIG_SYS_PCI2_MMIO_PHYS,
CONFIG_SYS_PCI2_MMIO_SIZE,
PCI_REGION_MEM);
/* PCI IO space */
pci_set_region(hose->regions + 2,
CONFIG_SYS_PCI2_IO_BASE,
CONFIG_SYS_PCI2_IO_PHYS,
CONFIG_SYS_PCI2_IO_SIZE,
PCI_REGION_IO);
/* System memory space */
pci_set_region(hose->regions + 3,
CONFIG_PCI_SYS_MEM_BUS,
CONFIG_PCI_SYS_MEM_PHYS,
gd->ram_size,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
hose->region_count = 4;
pci_setup_indirect(hose,
(CONFIG_SYS_IMMR+0x8380),
(CONFIG_SYS_IMMR+0x8384));
pci_register_hose(hose);
/*
* Write to Command register
*/
reg16 = 0xff;
dev = PCI_BDF(hose->first_busno, 0, 0);
pci_hose_read_config_word (hose, dev, PCI_COMMAND, &reg16);
reg16 |= PCI_COMMAND_SERR | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY;
pci_hose_write_config_word(hose, dev, PCI_COMMAND, reg16);
/*
* Clear non-reserved bits in status register.
*/
pci_hose_write_config_word(hose, dev, PCI_STATUS, 0xffff);
pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80);
pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08);
/*
* Hose scan.
*/
hose->last_busno = pci_hose_scan(hose);
#endif
}
#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(pci_hose[0].first_busno);
tmp[1] = cpu_to_be32(pci_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);
}
#ifdef CONFIG_MPC83XX_PCI2
path = fdt_getprop(blob, nodeoffset, "pci1", NULL);
if (path) {
tmp[0] = cpu_to_be32(pci_hose[0].first_busno);
tmp[1] = cpu_to_be32(pci_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
}
}
#endif /* CONFIG_OF_LIBFDT */
#endif /* CONFIG_PCI */
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