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/*
* Copyright (C) 2013 Imagination Technologies
* Author: Paul Burton <paul.burton@imgtec.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <msc01.h>
#include <pci.h>
#include <pci_msc01.h>
#include <asm/io.h>
#define PCI_ACCESS_READ 0
#define PCI_ACCESS_WRITE 1
struct msc01_pci_controller {
struct pci_controller hose;
void *base;
};
static inline struct msc01_pci_controller *
hose_to_msc01(struct pci_controller *hose)
{
return container_of(hose, struct msc01_pci_controller, hose);
}
static int msc01_config_access(struct msc01_pci_controller *msc01,
unsigned char access_type, pci_dev_t bdf,
int where, u32 *data)
{
const u32 aborts = MSC01_PCI_INTSTAT_MA_MSK | MSC01_PCI_INTSTAT_TA_MSK;
void *intstat = msc01->base + MSC01_PCI_INTSTAT_OFS;
void *cfgdata = msc01->base + MSC01_PCI_CFGDATA_OFS;
unsigned int bus = PCI_BUS(bdf);
unsigned int dev = PCI_DEV(bdf);
unsigned int devfn = PCI_DEV(bdf) << 3 | PCI_FUNC(bdf);
/* clear abort status */
__raw_writel(aborts, intstat);
/* setup address */
__raw_writel((bus << MSC01_PCI_CFGADDR_BNUM_SHF) |
(dev << MSC01_PCI_CFGADDR_DNUM_SHF) |
(devfn << MSC01_PCI_CFGADDR_FNUM_SHF) |
((where / 4) << MSC01_PCI_CFGADDR_RNUM_SHF),
msc01->base + MSC01_PCI_CFGADDR_OFS);
/* perform access */
if (access_type == PCI_ACCESS_WRITE)
__raw_writel(*data, cfgdata);
else
*data = __raw_readl(cfgdata);
/* check for aborts */
if (__raw_readl(intstat) & aborts) {
/* clear abort status */
__raw_writel(aborts, intstat);
return -1;
}
return 0;
}
static int msc01_read_config_dword(struct pci_controller *hose, pci_dev_t dev,
int where, u32 *value)
{
struct msc01_pci_controller *msc01 = hose_to_msc01(hose);
*value = 0xffffffff;
return msc01_config_access(msc01, PCI_ACCESS_READ, dev, where, value);
}
static int msc01_write_config_dword(struct pci_controller *hose, pci_dev_t dev,
int where, u32 value)
{
struct msc01_pci_controller *gt = hose_to_msc01(hose);
u32 data = value;
return msc01_config_access(gt, PCI_ACCESS_WRITE, dev, where, &data);
}
void msc01_pci_init(void *base, unsigned long sys_bus, unsigned long sys_phys,
unsigned long sys_size, unsigned long mem_bus,
unsigned long mem_phys, unsigned long mem_size,
unsigned long io_bus, unsigned long io_phys,
unsigned long io_size)
{
static struct msc01_pci_controller global_msc01;
struct msc01_pci_controller *msc01;
struct pci_controller *hose;
msc01 = &global_msc01;
msc01->base = base;
hose = &msc01->hose;
hose->first_busno = 0;
hose->last_busno = 0;
/* System memory space */
pci_set_region(&hose->regions[0], sys_bus, sys_phys, sys_size,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
/* PCI memory space */
pci_set_region(&hose->regions[1], mem_bus, mem_phys, mem_size,
PCI_REGION_MEM);
/* PCI I/O space */
pci_set_region(&hose->regions[2], io_bus, io_phys, io_size,
PCI_REGION_IO);
hose->region_count = 3;
pci_set_ops(hose,
pci_hose_read_config_byte_via_dword,
pci_hose_read_config_word_via_dword,
msc01_read_config_dword,
pci_hose_write_config_byte_via_dword,
pci_hose_write_config_word_via_dword,
msc01_write_config_dword);
pci_register_hose(hose);
hose->last_busno = pci_hose_scan(hose);
}