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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2008 Lemote Technology
* Copyright (C) 2004 ICT CAS
* Author: Li xiaoyu, lixy@ict.ac.cn
*
* Copyright (C) 2007 Lemote, Inc.
* Author: Fuxin Zhang, zhangfx@lemote.com
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <loongson.h>
#include <cs5536/cs5536.h>
#include <cs5536/cs5536_pci.h>
/* PCI interrupt pins
*
* These should not be changed, or you should consider loongson2f interrupt
* register and your pci card dispatch
*/
#define PCIA 4
#define PCIB 5
#define PCIC 6
#define PCID 7
/* all the pci device has the PCIA pin, check the datasheet. */
static char irq_tab[][5] = {
/* INTA INTB INTC INTD */
{0, 0, 0, 0, 0}, /* 11: Unused */
{0, 0, 0, 0, 0}, /* 12: Unused */
{0, 0, 0, 0, 0}, /* 13: Unused */
{0, 0, 0, 0, 0}, /* 14: Unused */
{0, 0, 0, 0, 0}, /* 15: Unused */
{0, 0, 0, 0, 0}, /* 16: Unused */
{0, PCIA, 0, 0, 0}, /* 17: RTL8110-0 */
{0, PCIB, 0, 0, 0}, /* 18: RTL8110-1 */
{0, PCIC, 0, 0, 0}, /* 19: SiI3114 */
{0, PCID, 0, 0, 0}, /* 20: 3-ports nec usb */
{0, PCIA, PCIB, PCIC, PCID}, /* 21: PCI-SLOT */
{0, 0, 0, 0, 0}, /* 22: Unused */
{0, 0, 0, 0, 0}, /* 23: Unused */
{0, 0, 0, 0, 0}, /* 24: Unused */
{0, 0, 0, 0, 0}, /* 25: Unused */
{0, 0, 0, 0, 0}, /* 26: Unused */
{0, 0, 0, 0, 0}, /* 27: Unused */
};
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
int virq;
if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
&& (PCI_SLOT(dev->devfn) < 32)) {
virq = irq_tab[slot][pin];
printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
virq + LOONGSON_IRQ_BASE);
if (virq != 0)
return LOONGSON_IRQ_BASE + virq;
else
return 0;
} else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) { /* cs5536 */
switch (PCI_FUNC(dev->devfn)) {
case 2:
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_IDE_INTR);
return CS5536_IDE_INTR; /* for IDE */
case 3:
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_ACC_INTR);
return CS5536_ACC_INTR; /* for AUDIO */
case 4: /* for OHCI */
case 5: /* for EHCI */
case 6: /* for UDC */
case 7: /* for OTG */
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_USB_INTR);
return CS5536_USB_INTR;
}
return dev->irq;
} else {
printk(KERN_INFO "strange PCI slot number.\n");
return 0;
}
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
/* CS5536 SPEC. fixup */
static void loongson_cs5536_isa_fixup(struct pci_dev *pdev)
{
/* the uart1 and uart2 interrupt in PIC is enabled as default */
pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
}
static void loongson_cs5536_ide_fixup(struct pci_dev *pdev)
{
/* setting the mutex pin as IDE function */
pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
CS5536_IDE_FLASH_SIGNATURE);
}
static void loongson_cs5536_acc_fixup(struct pci_dev *pdev)
{
/* enable the AUDIO interrupt in PIC */
pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
}
static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
{
/* enable the OHCI interrupt in PIC */
/* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
}
static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
{
u32 hi, lo;
/* Serial short detect enable */
_rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
_wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
/* setting the USB2.0 micro frame length */
pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
}
static void loongson_nec_fixup(struct pci_dev *pdev)
{
unsigned int val;
pci_read_config_dword(pdev, 0xe0, &val);
/* Only 2 port be used */
pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
loongson_cs5536_isa_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
loongson_cs5536_ohci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
loongson_cs5536_ehci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
loongson_cs5536_acc_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
loongson_cs5536_ide_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
loongson_nec_fixup);
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