// SPDX-License-Identifier: GPL-2.0
|
#include <linux/kernel.h>
|
#include <linux/types.h>
|
#include <linux/init.h>
|
#include <linux/delay.h>
|
#include <linux/pci.h>
|
#include <linux/io.h>
|
#include <linux/sh_intc.h>
|
#include "pci-sh4.h"
|
|
int pcibios_map_platform_irq(const struct pci_dev *, u8 slot, u8 pin)
|
{
|
switch (slot) {
|
case 0: return evt2irq(0x3a0);
|
case 1: return evt2irq(0x3a0); /* AMD Ethernet controller */
|
case 2: return -1;
|
case 3: return -1;
|
case 4: return -1;
|
default:
|
printk("PCI: Bad IRQ mapping request for slot %d\n", slot);
|
return -1;
|
}
|
}
|
|
#define PCIMCR_MRSET_OFF 0xBFFFFFFF
|
#define PCIMCR_RFSH_OFF 0xFFFFFFFB
|
|
/*
|
* Only long word accesses of the PCIC's internal local registers and the
|
* configuration registers from the CPU is supported.
|
*/
|
#define PCIC_WRITE(x,v) writel((v), PCI_REG(x))
|
#define PCIC_READ(x) readl(PCI_REG(x))
|
|
/*
|
* Description: This function sets up and initializes the pcic, sets
|
* up the BARS, maps the DRAM into the address space etc, etc.
|
*/
|
int pci_fixup_pcic(struct pci_channel *chan)
|
{
|
unsigned long bcr1, wcr1, wcr2, wcr3, mcr;
|
unsigned short bcr2;
|
|
/*
|
* Initialize the slave bus controller on the pcic. The values used
|
* here should not be hardcoded, but they should be taken from the bsc
|
* on the processor, to make this function as generic as possible.
|
* (i.e. Another sbc may usr different SDRAM timing settings -- in order
|
* for the pcic to work, its settings need to be exactly the same.)
|
*/
|
bcr1 = (*(volatile unsigned long*)(SH7751_BCR1));
|
bcr2 = (*(volatile unsigned short*)(SH7751_BCR2));
|
wcr1 = (*(volatile unsigned long*)(SH7751_WCR1));
|
wcr2 = (*(volatile unsigned long*)(SH7751_WCR2));
|
wcr3 = (*(volatile unsigned long*)(SH7751_WCR3));
|
mcr = (*(volatile unsigned long*)(SH7751_MCR));
|
|
bcr1 = bcr1 | 0x00080000; /* Enable Bit 19, BREQEN */
|
(*(volatile unsigned long*)(SH7751_BCR1)) = bcr1;
|
|
bcr1 = bcr1 | 0x40080000; /* Enable Bit 19 BREQEN, set PCIC to slave */
|
PCIC_WRITE(SH7751_PCIBCR1, bcr1); /* PCIC BCR1 */
|
PCIC_WRITE(SH7751_PCIBCR2, bcr2); /* PCIC BCR2 */
|
PCIC_WRITE(SH7751_PCIWCR1, wcr1); /* PCIC WCR1 */
|
PCIC_WRITE(SH7751_PCIWCR2, wcr2); /* PCIC WCR2 */
|
PCIC_WRITE(SH7751_PCIWCR3, wcr3); /* PCIC WCR3 */
|
mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
|
PCIC_WRITE(SH7751_PCIMCR, mcr); /* PCIC MCR */
|
|
|
/* Enable all interrupts, so we know what to fix */
|
PCIC_WRITE(SH7751_PCIINTM, 0x0000c3ff);
|
PCIC_WRITE(SH7751_PCIAINTM, 0x0000380f);
|
|
/* Set up standard PCI config registers */
|
PCIC_WRITE(SH7751_PCICONF1, 0xF39000C7); /* Bus Master, Mem & I/O access */
|
PCIC_WRITE(SH7751_PCICONF2, 0x00000000); /* PCI Class code & Revision ID */
|
PCIC_WRITE(SH7751_PCICONF4, 0xab000001); /* PCI I/O address (local regs) */
|
PCIC_WRITE(SH7751_PCICONF5, 0x0c000000); /* PCI MEM address (local RAM) */
|
PCIC_WRITE(SH7751_PCICONF6, 0xd0000000); /* PCI MEM address (unused) */
|
PCIC_WRITE(SH7751_PCICONF11, 0x35051054); /* PCI Subsystem ID & Vendor ID */
|
PCIC_WRITE(SH7751_PCILSR0, 0x03f00000); /* MEM (full 64M exposed) */
|
PCIC_WRITE(SH7751_PCILSR1, 0x00000000); /* MEM (unused) */
|
PCIC_WRITE(SH7751_PCILAR0, 0x0c000000); /* MEM (direct map from PCI) */
|
PCIC_WRITE(SH7751_PCILAR1, 0x00000000); /* MEM (unused) */
|
|
/* Now turn it on... */
|
PCIC_WRITE(SH7751_PCICR, 0xa5000001);
|
|
/*
|
* Set PCIMBR and PCIIOBR here, assuming a single window
|
* (16M MEM, 256K IO) is enough. If a larger space is
|
* needed, the readx/writex and inx/outx functions will
|
* have to do more (e.g. setting registers for each call).
|
*/
|
|
/*
|
* Set the MBR so PCI address is one-to-one with window,
|
* meaning all calls go straight through... use BUG_ON to
|
* catch erroneous assumption.
|
*/
|
BUG_ON(chan->resources[1].start != SH7751_PCI_MEMORY_BASE);
|
|
PCIC_WRITE(SH7751_PCIMBR, chan->resources[1].start);
|
|
/* Set IOBR for window containing area specified in pci.h */
|
PCIC_WRITE(SH7751_PCIIOBR, (chan->resources[0].start & SH7751_PCIIOBR_MASK));
|
|
/* All done, may as well say so... */
|
printk("SH7751 PCI: Finished initialization of the PCI controller\n");
|
|
return 1;
|
}
|
