pci_sh7780.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* SH7780 PCI Controller (PCIC) for U-Boot.
* (C) Dustin McIntire (dustin@sensoria.com)
* (C) 2007,2008 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* (C) 2008 Yusuke Goda <goda.yusuke@renesas.com>
*/
#include <common.h>
#include <pci.h>
#include <asm/processor.h>
#include <asm/pci.h>
#include <asm/io.h>
#define SH7780_VENDOR_ID 0x1912
#define SH7780_DEVICE_ID 0x0002
#define SH7780_PCICR_PREFIX 0xA5000000
#define SH7780_PCICR_PFCS 0x00000800
#define SH7780_PCICR_FTO 0x00000400
#define SH7780_PCICR_PFE 0x00000200
#define SH7780_PCICR_TBS 0x00000100
#define SH7780_PCICR_ARBM 0x00000040
#define SH7780_PCICR_IOCS 0x00000004
#define SH7780_PCICR_PRST 0x00000002
#define SH7780_PCICR_CFIN 0x00000001
#define p4_in(addr) (*(vu_long *)addr)
#define p4_out(data, addr) (*(vu_long *)addr) = (data)
#define p4_inw(addr) (*(vu_short *)addr)
#define p4_outw(data, addr) (*(vu_short *)addr) = (data)
int pci_sh4_read_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32 *value)
{
u32 par_data = 0x80000000 | dev;
p4_out(par_data | (offset & 0xfc), SH7780_PCIPAR);
*value = p4_in(SH7780_PCIPDR);
return 0;
}
int pci_sh4_write_config_dword(struct pci_controller *hose,
pci_dev_t dev, int offset, u32 value)
{
u32 par_data = 0x80000000 | dev;
p4_out(par_data | (offset & 0xfc), SH7780_PCIPAR);
p4_out(value, SH7780_PCIPDR);
return 0;
}
int pci_sh7780_init(struct pci_controller *hose)
{
p4_out(0x01, SH7780_PCIECR);
if (p4_inw(SH7780_PCIVID) != SH7780_VENDOR_ID
&& p4_inw(SH7780_PCIDID) != SH7780_DEVICE_ID) {
printf("PCI: Unknown PCI host bridge.\n");
return -1;
}
printf("PCI: SH7780 PCI host bridge found.\n");
/* Toggle PCI reset pin */
p4_out((SH7780_PCICR_PREFIX | SH7780_PCICR_PRST), SH7780_PCICR);
udelay(100000);
p4_out(SH7780_PCICR_PREFIX, SH7780_PCICR);
p4_outw(0x0047, SH7780_PCICMD);
p4_out(CONFIG_SH7780_PCI_LSR, SH7780_PCILSR0);
p4_out(CONFIG_SH7780_PCI_LAR, SH7780_PCILAR0);
p4_out(0x00000000, SH7780_PCILSR1);
p4_out(0, SH7780_PCILAR1);
p4_out(CONFIG_SH7780_PCI_BAR, SH7780_PCIMBAR0);
p4_out(0x00000000, SH7780_PCIMBAR1);
p4_out(0xFD000000, SH7780_PCIMBR0);
p4_out(0x00FC0000, SH7780_PCIMBMR0);
/* if use Operand Cache then enable PCICSCR Soonp bits. */
p4_out(0x08000000, SH7780_PCICSAR0);
p4_out(0x0000001B, SH7780_PCICSCR0); /* Snoop bit :On */
p4_out((SH7780_PCICR_PREFIX | SH7780_PCICR_CFIN | SH7780_PCICR_ARBM
| SH7780_PCICR_FTO | SH7780_PCICR_PFCS | SH7780_PCICR_PFE),
SH7780_PCICR);
pci_sh4_init(hose);
return 0;
}