mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-14 07:13:03 +00:00
6aa3d3bfaa
This change lays the groundwork for the BOOTFLAG_* flags being removed. This change has the small affect of delaying 100ms on PCI initialization after a warm boot as opposed to the optimal 1ms on some boards. Signed-off-by: Peter Tyser <ptyser@xes-inc.com> included the mpc8308_p1m board. Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
241 lines
6.4 KiB
C
241 lines
6.4 KiB
C
/*
|
|
* Copyright (C) Freescale Semiconductor, Inc. 2007
|
|
*
|
|
* Author: Scott Wood <scottwood@freescale.com>,
|
|
* with some bits from older board-specific PCI initialization.
|
|
*
|
|
* 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 <common.h>
|
|
#include <pci.h>
|
|
|
|
#if defined(CONFIG_OF_LIBFDT)
|
|
#include <libfdt.h>
|
|
#include <fdt_support.h>
|
|
#endif
|
|
|
|
#include <asm/mpc8349_pci.h>
|
|
|
|
#define MAX_BUSES 2
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static struct pci_controller pci_hose[MAX_BUSES];
|
|
static int pci_num_buses;
|
|
|
|
static void pci_init_bus(int bus, struct pci_region *reg)
|
|
{
|
|
volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
|
|
volatile pot83xx_t *pot = immr->ios.pot;
|
|
volatile pcictrl83xx_t *pci_ctrl = &immr->pci_ctrl[bus];
|
|
struct pci_controller *hose = &pci_hose[bus];
|
|
u32 dev;
|
|
u16 reg16;
|
|
int i;
|
|
|
|
if (bus == 1)
|
|
pot += 3;
|
|
|
|
/* Setup outbound translation windows */
|
|
for (i = 0; i < 3; i++, reg++, pot++) {
|
|
if (reg->size == 0)
|
|
break;
|
|
|
|
hose->regions[i] = *reg;
|
|
hose->region_count++;
|
|
|
|
pot->potar = reg->bus_start >> 12;
|
|
pot->pobar = reg->phys_start >> 12;
|
|
pot->pocmr = ~(reg->size - 1) >> 12;
|
|
|
|
if (reg->flags & PCI_REGION_IO)
|
|
pot->pocmr |= POCMR_IO;
|
|
#ifdef CONFIG_83XX_PCI_STREAMING
|
|
else if (reg->flags & PCI_REGION_PREFETCH)
|
|
pot->pocmr |= POCMR_SE;
|
|
#endif
|
|
|
|
if (bus == 1)
|
|
pot->pocmr |= POCMR_DST;
|
|
|
|
pot->pocmr |= POCMR_EN;
|
|
}
|
|
|
|
/* Point inbound translation at RAM */
|
|
pci_ctrl->pitar1 = 0;
|
|
pci_ctrl->pibar1 = 0;
|
|
pci_ctrl->piebar1 = 0;
|
|
pci_ctrl->piwar1 = PIWAR_EN | PIWAR_PF | PIWAR_RTT_SNOOP |
|
|
PIWAR_WTT_SNOOP | (__ilog2(gd->ram_size - 1));
|
|
|
|
i = hose->region_count++;
|
|
hose->regions[i].bus_start = 0;
|
|
hose->regions[i].phys_start = 0;
|
|
hose->regions[i].size = gd->ram_size;
|
|
hose->regions[i].flags = PCI_REGION_MEM | PCI_REGION_SYS_MEMORY;
|
|
|
|
hose->first_busno = pci_last_busno() + 1;
|
|
hose->last_busno = 0xff;
|
|
|
|
pci_setup_indirect(hose, CONFIG_SYS_IMMR + 0x8300 + bus * 0x80,
|
|
CONFIG_SYS_IMMR + 0x8304 + bus * 0x80);
|
|
|
|
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, ®16);
|
|
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
|
|
#ifndef CONFIG_PCISLAVE
|
|
/*
|
|
* Hose scan.
|
|
*/
|
|
hose->last_busno = pci_hose_scan(hose);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* The caller must have already set OCCR, and the PCI_LAW BARs
|
|
* must have been set to cover all of the requested regions.
|
|
*
|
|
* If fewer than three regions are requested, then the region
|
|
* list is terminated with a region of size 0.
|
|
*/
|
|
void mpc83xx_pci_init(int num_buses, struct pci_region **reg)
|
|
{
|
|
volatile immap_t *immr = (volatile immap_t *)CONFIG_SYS_IMMR;
|
|
int i;
|
|
|
|
if (num_buses > MAX_BUSES) {
|
|
printf("%d PCI buses requsted, %d supported\n",
|
|
num_buses, MAX_BUSES);
|
|
|
|
num_buses = MAX_BUSES;
|
|
}
|
|
|
|
pci_num_buses = num_buses;
|
|
|
|
/*
|
|
* Release PCI RST Output signal.
|
|
* Power on to RST high must be at least 100 ms as per PCI spec.
|
|
* On warm boots only 1 ms is required, but we play it safe.
|
|
*/
|
|
udelay(100000);
|
|
|
|
for (i = 0; i < num_buses; i++)
|
|
immr->pci_ctrl[i].gcr = 1;
|
|
|
|
/*
|
|
* RST high to first config access must be at least 2^25 cycles
|
|
* as per PCI spec. This could be cut in half if we know we're
|
|
* running at 66MHz. This could be insufficiently long if we're
|
|
* running the PCI bus at significantly less than 33MHz.
|
|
*/
|
|
udelay(1020000);
|
|
|
|
for (i = 0; i < num_buses; i++)
|
|
pci_init_bus(i, reg[i]);
|
|
}
|
|
|
|
#ifdef CONFIG_PCISLAVE
|
|
|
|
#define PCI_FUNCTION_CONFIG 0x44
|
|
#define PCI_FUNCTION_CFG_LOCK 0x20
|
|
|
|
/*
|
|
* Unlock the configuration bit so that the host system can begin booting
|
|
*
|
|
* This should be used after you have:
|
|
* 1) Called mpc83xx_pci_init()
|
|
* 2) Set up your inbound translation windows to the appropriate size
|
|
*/
|
|
void mpc83xx_pcislave_unlock(int bus)
|
|
{
|
|
struct pci_controller *hose = &pci_hose[bus];
|
|
u32 dev;
|
|
u16 reg16;
|
|
|
|
/* Unlock configuration lock in PCI function configuration register */
|
|
dev = PCI_BDF(hose->first_busno, 0, 0);
|
|
pci_hose_read_config_word (hose, dev, PCI_FUNCTION_CONFIG, ®16);
|
|
reg16 &= ~(PCI_FUNCTION_CFG_LOCK);
|
|
pci_hose_write_config_word (hose, dev, PCI_FUNCTION_CONFIG, reg16);
|
|
|
|
/* The configuration bit is now unlocked, so we can scan the bus */
|
|
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;
|
|
|
|
if (pci_num_buses < 1)
|
|
return;
|
|
|
|
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);
|
|
}
|
|
|
|
if (pci_num_buses < 2)
|
|
return;
|
|
|
|
path = fdt_getprop(blob, nodeoffset, "pci1", NULL);
|
|
if (path) {
|
|
tmp[0] = cpu_to_be32(pci_hose[1].first_busno);
|
|
tmp[1] = cpu_to_be32(pci_hose[1].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 */
|