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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Copyright (c) 2005 MontaVista Software, Inc.
* Vitaly Bordug <vbordug@ru.mvista.com>
* Added support for PCI bridge on MPC8272ADS
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#ifdef CONFIG_PCI
#include <pci.h>
#include <mpc8260.h>
#include <asm/m8260_pci.h>
#include <asm/io.h>
#ifdef CONFIG_OF_LIBFDT
#include <libfdt.h>
#include <fdt_support.h>
#endif
/*
* Local->PCI map (from CPU) controlled by
* MPC826x master window
*
* 0x80000000 - 0xBFFFFFFF CPU2PCI space PCIBR0
* 0xF4000000 - 0xF7FFFFFF CPU2PCI space PCIBR1
*
* 0x80000000 - 0x9FFFFFFF 0x80000000 - 0x9FFFFFFF (Outbound ATU #1)
* PCI Mem with prefetch
*
* 0xA0000000 - 0xBFFFFFFF 0xA0000000 - 0xBFFFFFFF (Outbound ATU #2)
* PCI Mem w/o prefetch
*
* 0xF4000000 - 0xF7FFFFFF 0x00000000 - 0x03FFFFFF (Outbound ATU #3)
* 32-bit PCI IO
*
* PCI->Local map (from PCI)
* MPC826x slave window controlled by
*
* 0x00000000 - 0x1FFFFFFF 0x00000000 - 0x1FFFFFFF (Inbound ATU #1)
* MPC826x local memory
*/
/*
* Slave window that allows PCI masters to access MPC826x local memory.
* This window is set up using the first set of Inbound ATU registers
*/
#ifndef CONFIG_SYS_PCI_SLV_MEM_LOCAL
#define PCI_SLV_MEM_LOCAL CONFIG_SYS_SDRAM_BASE /* Local base */
#else
#define PCI_SLV_MEM_LOCAL CONFIG_SYS_PCI_SLV_MEM_LOCAL
#endif
#ifndef CONFIG_SYS_PCI_SLV_MEM_BUS
#define PCI_SLV_MEM_BUS 0x00000000 /* PCI base */
#else
#define PCI_SLV_MEM_BUS CONFIG_SYS_PCI_SLV_MEM_BUS
#endif
#ifndef CONFIG_SYS_PICMR0_MASK_ATTRIB
#define PICMR0_MASK_ATTRIB (PICMR_MASK_512MB | PICMR_ENABLE | \
PICMR_PREFETCH_EN)
#else
#define PICMR0_MASK_ATTRIB CONFIG_SYS_PICMR0_MASK_ATTRIB
#endif
/*
* These are the windows that allow the CPU to access PCI address space.
* All three PCI master windows, which allow the CPU to access PCI
* prefetch, non prefetch, and IO space (see below), must all fit within
* these windows.
*/
/* PCIBR0 */
#ifndef CONFIG_SYS_PCI_MSTR0_LOCAL
#define PCI_MSTR0_LOCAL 0x80000000 /* Local base */
#else
#define PCI_MSTR0_LOCAL CONFIG_SYS_PCI_MSTR0_LOCAL
#endif
#ifndef CONFIG_SYS_PCIMSK0_MASK
#define PCIMSK0_MASK PCIMSK_1GB /* Size of window */
#else
#define PCIMSK0_MASK CONFIG_SYS_PCIMSK0_MASK
#endif
/* PCIBR1 */
#ifndef CONFIG_SYS_PCI_MSTR1_LOCAL
#define PCI_MSTR1_LOCAL 0xF4000000 /* Local base */
#else
#define PCI_MSTR1_LOCAL CONFIG_SYS_PCI_MSTR1_LOCAL
#endif
#ifndef CONFIG_SYS_PCIMSK1_MASK
#define PCIMSK1_MASK PCIMSK_64MB /* Size of window */
#else
#define PCIMSK1_MASK CONFIG_SYS_PCIMSK1_MASK
#endif
/*
* Master window that allows the CPU to access PCI Memory (prefetch).
* This window will be setup with the first set of Outbound ATU registers
* in the bridge.
*/
#ifndef CONFIG_SYS_PCI_MSTR_MEM_LOCAL
#define PCI_MSTR_MEM_LOCAL 0x80000000 /* Local base */
#else
#define PCI_MSTR_MEM_LOCAL CONFIG_SYS_PCI_MSTR_MEM_LOCAL
#endif
#ifndef CONFIG_SYS_PCI_MSTR_MEM_BUS
#define PCI_MSTR_MEM_BUS 0x80000000 /* PCI base */
#else
#define PCI_MSTR_MEM_BUS CONFIG_SYS_PCI_MSTR_MEM_BUS
#endif
#ifndef CONFIG_SYS_CPU_PCI_MEM_START
#define CPU_PCI_MEM_START PCI_MSTR_MEM_LOCAL
#else
#define CPU_PCI_MEM_START CONFIG_SYS_CPU_PCI_MEM_START
#endif
#ifndef CONFIG_SYS_PCI_MSTR_MEM_SIZE
#define PCI_MSTR_MEM_SIZE 0x10000000 /* 256MB */
#else
#define PCI_MSTR_MEM_SIZE CONFIG_SYS_PCI_MSTR_MEM_SIZE
#endif
#ifndef CONFIG_SYS_POCMR0_MASK_ATTRIB
#define POCMR0_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PREFETCH_EN)
#else
#define POCMR0_MASK_ATTRIB CONFIG_SYS_POCMR0_MASK_ATTRIB
#endif
/*
* Master window that allows the CPU to access PCI Memory (non-prefetch).
* This window will be setup with the second set of Outbound ATU registers
* in the bridge.
*/
#ifndef CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL
#define PCI_MSTR_MEMIO_LOCAL 0x90000000 /* Local base */
#else
#define PCI_MSTR_MEMIO_LOCAL CONFIG_SYS_PCI_MSTR_MEMIO_LOCAL
#endif
#ifndef CONFIG_SYS_PCI_MSTR_MEMIO_BUS
#define PCI_MSTR_MEMIO_BUS 0x90000000 /* PCI base */
#else
#define PCI_MSTR_MEMIO_BUS CONFIG_SYS_PCI_MSTR_MEMIO_BUS
#endif
#ifndef CONFIG_SYS_CPU_PCI_MEMIO_START
#define CPU_PCI_MEMIO_START PCI_MSTR_MEMIO_LOCAL
#else
#define CPU_PCI_MEMIO_START CONFIG_SYS_CPU_PCI_MEMIO_START
#endif
#ifndef CONFIG_SYS_PCI_MSTR_MEMIO_SIZE
#define PCI_MSTR_MEMIO_SIZE 0x10000000 /* 256 MB */
#else
#define PCI_MSTR_MEMIO_SIZE CONFIG_SYS_PCI_MSTR_MEMIO_SIZE
#endif
#ifndef CONFIG_SYS_POCMR1_MASK_ATTRIB
#define POCMR1_MASK_ATTRIB (POCMR_MASK_512MB | POCMR_ENABLE)
#else
#define POCMR1_MASK_ATTRIB CONFIG_SYS_POCMR1_MASK_ATTRIB
#endif
/*
* Master window that allows the CPU to access PCI IO space.
* This window will be setup with the third set of Outbound ATU registers
* in the bridge.
*/
#ifndef CONFIG_SYS_PCI_MSTR_IO_LOCAL
#define PCI_MSTR_IO_LOCAL 0xA0000000 /* Local base */
#else
#define PCI_MSTR_IO_LOCAL CONFIG_SYS_PCI_MSTR_IO_LOCAL
#endif
#ifndef CONFIG_SYS_PCI_MSTR_IO_BUS
#define PCI_MSTR_IO_BUS 0xA0000000 /* PCI base */
#else
#define PCI_MSTR_IO_BUS CONFIG_SYS_PCI_MSTR_IO_BUS
#endif
#ifndef CONFIG_SYS_CPU_PCI_IO_START
#define CPU_PCI_IO_START PCI_MSTR_IO_LOCAL
#else
#define CPU_PCI_IO_START CONFIG_SYS_CPU_PCI_IO_START
#endif
#ifndef CONFIG_SYS_PCI_MSTR_IO_SIZE
#define PCI_MSTR_IO_SIZE 0x10000000 /* 256MB */
#else
#define PCI_MSTR_IO_SIZE CONFIG_SYS_PCI_MSTR_IO_SIZE
#endif
#ifndef CONFIG_SYS_POCMR2_MASK_ATTRIB
#define POCMR2_MASK_ATTRIB (POCMR_MASK_256MB | POCMR_ENABLE | POCMR_PCI_IO)
#else
#define POCMR2_MASK_ATTRIB CONFIG_SYS_POCMR2_MASK_ATTRIB
#endif
/* PCI bus configuration registers.
*/
#define PCI_CLASS_BRIDGE_CTLR 0x06
static inline void pci_outl (u32 addr, u32 data)
{
*(volatile u32 *) addr = cpu_to_le32 (data);
}
void pci_mpc8250_init (struct pci_controller *hose)
{
u16 tempShort;
volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
pci_dev_t host_devno = PCI_BDF (0, 0, 0);
pci_setup_indirect (hose, CONFIG_SYS_IMMR + PCI_CFG_ADDR_REG,
CONFIG_SYS_IMMR + PCI_CFG_DATA_REG);
/*
* Setting required to enable IRQ1-IRQ7 (SIUMCR [DPPC]),
* and local bus for PCI (SIUMCR [LBPC]).
*/
immap->im_siu_conf.sc_siumcr = (immap->im_siu_conf.sc_siumcr &
~SIUMCR_LBPC11 &
~SIUMCR_CS10PC11 &
~SIUMCR_LBPC11) |
SIUMCR_LBPC01 |
SIUMCR_CS10PC01 |
SIUMCR_APPC10;
/* Make PCI lowest priority */
/* Each 4 bits is a device bus request and the MS 4bits
is highest priority */
/* Bus 4bit value
--- ----------
CPM high 0b0000
CPM middle 0b0001
CPM low 0b0010
PCI reguest 0b0011
Reserved 0b0100
Reserved 0b0101
Internal Core 0b0110
External Master 1 0b0111
External Master 2 0b1000
External Master 3 0b1001
The rest are reserved */
immap->im_siu_conf.sc_ppc_alrh = 0x61207893;
/* Park bus on core while modifying PCI Bus accesses */
immap->im_siu_conf.sc_ppc_acr = 0x6;
/*
* Set up master windows that allow the CPU to access PCI space. These
* windows are set up using the two SIU PCIBR registers.
*/
immap->im_memctl.memc_pcimsk0 = PCIMSK0_MASK;
immap->im_memctl.memc_pcibr0 = PCI_MSTR0_LOCAL | PCIBR_ENABLE;
/* Release PCI RST (by default the PCI RST signal is held low) */
immap->im_pci.pci_gcr = cpu_to_le32 (PCIGCR_PCI_BUS_EN);
/* give it some time */
{
udelay (1000);
}
/*
* Set up master window that allows the CPU to access PCI Memory (prefetch)
* space. This window is set up using the first set of Outbound ATU registers.
*/
immap->im_pci.pci_potar0 = cpu_to_le32 (PCI_MSTR_MEM_BUS >> 12); /* PCI base */
immap->im_pci.pci_pobar0 = cpu_to_le32 (PCI_MSTR_MEM_LOCAL >> 12); /* Local base */
immap->im_pci.pci_pocmr0 = cpu_to_le32 (POCMR0_MASK_ATTRIB); /* Size & attribute */
/*
* Set up master window that allows the CPU to access PCI Memory (non-prefetch)
* space. This window is set up using the second set of Outbound ATU registers.
*/
immap->im_pci.pci_potar1 = cpu_to_le32 (PCI_MSTR_MEMIO_BUS >> 12); /* PCI base */
immap->im_pci.pci_pobar1 = cpu_to_le32 (PCI_MSTR_MEMIO_LOCAL >> 12); /* Local base */
immap->im_pci.pci_pocmr1 = cpu_to_le32 (POCMR1_MASK_ATTRIB); /* Size & attribute */
/*
* Set up master window that allows the CPU to access PCI IO space. This window
* is set up using the third set of Outbound ATU registers.
*/
immap->im_pci.pci_potar2 = cpu_to_le32 (PCI_MSTR_IO_BUS >> 12); /* PCI base */
immap->im_pci.pci_pobar2 = cpu_to_le32 (PCI_MSTR_IO_LOCAL >> 12); /* Local base */
immap->im_pci.pci_pocmr2 = cpu_to_le32 (POCMR2_MASK_ATTRIB); /* Size & attribute */
/*
* Set up slave window that allows PCI masters to access MPC826x local memory.
* This window is set up using the first set of Inbound ATU registers
*/
immap->im_pci.pci_pitar0 = cpu_to_le32 (PCI_SLV_MEM_LOCAL >> 12); /* PCI base */
immap->im_pci.pci_pibar0 = cpu_to_le32 (PCI_SLV_MEM_BUS >> 12); /* Local base */
immap->im_pci.pci_picmr0 = cpu_to_le32 (PICMR0_MASK_ATTRIB); /* Size & attribute */
/* See above for description - puts PCI request as highest priority */
immap->im_siu_conf.sc_ppc_alrh = 0x03124567;
/* Park the bus on the PCI */
immap->im_siu_conf.sc_ppc_acr = PPC_ACR_BUS_PARK_PCI;
/* Host mode - specify the bridge as a host-PCI bridge */
pci_hose_write_config_byte (hose, host_devno, PCI_CLASS_CODE,
PCI_CLASS_BRIDGE_CTLR);
/* Enable the host bridge to be a master on the PCI bus, and to act as a PCI memory target */
pci_hose_read_config_word (hose, host_devno, PCI_COMMAND, &tempShort);
pci_hose_write_config_word (hose, host_devno, PCI_COMMAND,
tempShort | PCI_COMMAND_MASTER |
PCI_COMMAND_MEMORY);
/* do some bridge init, should be done on all 8260 based bridges */
pci_hose_write_config_byte (hose, host_devno, PCI_CACHE_LINE_SIZE,
0x08);
pci_hose_write_config_byte (hose, host_devno, PCI_LATENCY_TIMER,
0xF8);
hose->first_busno = 0;
hose->last_busno = 0xff;
/* System memory space */
pci_set_region (hose->regions + 0,
CONFIG_SYS_SDRAM_BASE,
CONFIG_SYS_SDRAM_BASE,
0x4000000, PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
/* PCI memory space */
pci_set_region (hose->regions + 1,
PCI_MSTR_MEM_BUS,
PCI_MSTR_MEM_LOCAL,
PCI_MSTR_MEM_SIZE, PCI_REGION_MEM);
/* PCI I/O space */
pci_set_region (hose->regions + 2,
PCI_MSTR_IO_BUS,
PCI_MSTR_IO_LOCAL, PCI_MSTR_IO_SIZE, PCI_REGION_IO);
hose->region_count = 3;
pci_register_hose (hose);
/* Mask off master abort machine checks */
immap->im_pci.pci_emr &= cpu_to_le32 (~PCI_ERROR_PCI_NO_RSP);
eieio ();
hose->last_busno = pci_hose_scan (hose);
/* clear the error in the error status register */
immap->im_pci.pci_esr = cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
/* unmask master abort machine checks */
immap->im_pci.pci_emr |= cpu_to_le32 (PCI_ERROR_PCI_NO_RSP);
}
#if defined(CONFIG_OF_LIBFDT)
void ft_pci_setup(void *blob, bd_t *bd)
{
do_fixup_by_prop_u32(blob, "device_type", "pci", 4,
"clock-frequency", gd->pci_clk, 1);
}
#endif
#endif /* CONFIG_PCI */
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