327 lines
7.9 KiB
C
327 lines
7.9 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* the ISA Virtual Support Module of AMD CS5536
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007 Lemote, Inc.
|
||
|
|
* Author : jlliu, liujl@lemote.com
|
||
|
|
*
|
||
|
|
* Copyright (C) 2009 Lemote, Inc.
|
||
|
|
* Author: Wu Zhangjin, wuzhangjin@gmail.com
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/pci.h>
|
||
|
|
#include <cs5536/cs5536.h>
|
||
|
|
#include <cs5536/cs5536_pci.h>
|
||
|
|
|
||
|
|
/* common variables for PCI_ISA_READ/WRITE_BAR */
|
||
|
|
static const u32 divil_msr_reg[6] = {
|
||
|
|
DIVIL_MSR_REG(DIVIL_LBAR_SMB), DIVIL_MSR_REG(DIVIL_LBAR_GPIO),
|
||
|
|
DIVIL_MSR_REG(DIVIL_LBAR_MFGPT), DIVIL_MSR_REG(DIVIL_LBAR_IRQ),
|
||
|
|
DIVIL_MSR_REG(DIVIL_LBAR_PMS), DIVIL_MSR_REG(DIVIL_LBAR_ACPI),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const u32 soft_bar_flag[6] = {
|
||
|
|
SOFT_BAR_SMB_FLAG, SOFT_BAR_GPIO_FLAG, SOFT_BAR_MFGPT_FLAG,
|
||
|
|
SOFT_BAR_IRQ_FLAG, SOFT_BAR_PMS_FLAG, SOFT_BAR_ACPI_FLAG,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const u32 sb_msr_reg[6] = {
|
||
|
|
SB_MSR_REG(SB_R0), SB_MSR_REG(SB_R1), SB_MSR_REG(SB_R2),
|
||
|
|
SB_MSR_REG(SB_R3), SB_MSR_REG(SB_R4), SB_MSR_REG(SB_R5),
|
||
|
|
};
|
||
|
|
|
||
|
|
static const u32 bar_space_range[6] = {
|
||
|
|
CS5536_SMB_RANGE, CS5536_GPIO_RANGE, CS5536_MFGPT_RANGE,
|
||
|
|
CS5536_IRQ_RANGE, CS5536_PMS_RANGE, CS5536_ACPI_RANGE,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const int bar_space_len[6] = {
|
||
|
|
CS5536_SMB_LENGTH, CS5536_GPIO_LENGTH, CS5536_MFGPT_LENGTH,
|
||
|
|
CS5536_IRQ_LENGTH, CS5536_PMS_LENGTH, CS5536_ACPI_LENGTH,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* enable the divil module bar space.
|
||
|
|
*
|
||
|
|
* For all the DIVIL module LBAR, you should control the DIVIL LBAR reg
|
||
|
|
* and the RCONFx(0~5) reg to use the modules.
|
||
|
|
*/
|
||
|
|
static void divil_lbar_enable(void)
|
||
|
|
{
|
||
|
|
u32 hi, lo;
|
||
|
|
int offset;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The DIVIL IRQ is not used yet. and make the RCONF0 reserved.
|
||
|
|
*/
|
||
|
|
|
||
|
|
for (offset = DIVIL_LBAR_SMB; offset <= DIVIL_LBAR_PMS; offset++) {
|
||
|
|
_rdmsr(DIVIL_MSR_REG(offset), &hi, &lo);
|
||
|
|
hi |= 0x01;
|
||
|
|
_wrmsr(DIVIL_MSR_REG(offset), hi, lo);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* disable the divil module bar space.
|
||
|
|
*/
|
||
|
|
static void divil_lbar_disable(void)
|
||
|
|
{
|
||
|
|
u32 hi, lo;
|
||
|
|
int offset;
|
||
|
|
|
||
|
|
for (offset = DIVIL_LBAR_SMB; offset <= DIVIL_LBAR_PMS; offset++) {
|
||
|
|
_rdmsr(DIVIL_MSR_REG(offset), &hi, &lo);
|
||
|
|
hi &= ~0x01;
|
||
|
|
_wrmsr(DIVIL_MSR_REG(offset), hi, lo);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* BAR write: write value to the n BAR
|
||
|
|
*/
|
||
|
|
|
||
|
|
void pci_isa_write_bar(int n, u32 value)
|
||
|
|
{
|
||
|
|
u32 hi = 0, lo = value;
|
||
|
|
|
||
|
|
if (value == PCI_BAR_RANGE_MASK) {
|
||
|
|
_rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
|
||
|
|
lo |= soft_bar_flag[n];
|
||
|
|
_wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
|
||
|
|
} else if (value & 0x01) {
|
||
|
|
/* NATIVE reg */
|
||
|
|
hi = 0x0000f001;
|
||
|
|
lo &= bar_space_range[n];
|
||
|
|
_wrmsr(divil_msr_reg[n], hi, lo);
|
||
|
|
|
||
|
|
/* RCONFx is 4bytes in units for I/O space */
|
||
|
|
hi = ((value & 0x000ffffc) << 12) |
|
||
|
|
((bar_space_len[n] - 4) << 12) | 0x01;
|
||
|
|
lo = ((value & 0x000ffffc) << 12) | 0x01;
|
||
|
|
_wrmsr(sb_msr_reg[n], hi, lo);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* BAR read: read the n BAR
|
||
|
|
*/
|
||
|
|
|
||
|
|
u32 pci_isa_read_bar(int n)
|
||
|
|
{
|
||
|
|
u32 conf_data = 0;
|
||
|
|
u32 hi, lo;
|
||
|
|
|
||
|
|
_rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
|
||
|
|
if (lo & soft_bar_flag[n]) {
|
||
|
|
conf_data = bar_space_range[n] | PCI_BASE_ADDRESS_SPACE_IO;
|
||
|
|
lo &= ~soft_bar_flag[n];
|
||
|
|
_wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
|
||
|
|
} else {
|
||
|
|
_rdmsr(divil_msr_reg[n], &hi, &lo);
|
||
|
|
conf_data = lo & bar_space_range[n];
|
||
|
|
conf_data |= 0x01;
|
||
|
|
conf_data &= ~0x02;
|
||
|
|
}
|
||
|
|
return conf_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* isa_write: ISA write transfer
|
||
|
|
*
|
||
|
|
* We assume that this is not a bus master transfer.
|
||
|
|
*/
|
||
|
|
void pci_isa_write_reg(int reg, u32 value)
|
||
|
|
{
|
||
|
|
u32 hi = 0, lo = value;
|
||
|
|
u32 temp;
|
||
|
|
|
||
|
|
switch (reg) {
|
||
|
|
case PCI_COMMAND:
|
||
|
|
if (value & PCI_COMMAND_IO)
|
||
|
|
divil_lbar_enable();
|
||
|
|
else
|
||
|
|
divil_lbar_disable();
|
||
|
|
break;
|
||
|
|
case PCI_STATUS:
|
||
|
|
_rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
|
||
|
|
temp = lo & 0x0000ffff;
|
||
|
|
if ((value & PCI_STATUS_SIG_TARGET_ABORT) &&
|
||
|
|
(lo & SB_TAS_ERR_EN))
|
||
|
|
temp |= SB_TAS_ERR_FLAG;
|
||
|
|
|
||
|
|
if ((value & PCI_STATUS_REC_TARGET_ABORT) &&
|
||
|
|
(lo & SB_TAR_ERR_EN))
|
||
|
|
temp |= SB_TAR_ERR_FLAG;
|
||
|
|
|
||
|
|
if ((value & PCI_STATUS_REC_MASTER_ABORT)
|
||
|
|
&& (lo & SB_MAR_ERR_EN))
|
||
|
|
temp |= SB_MAR_ERR_FLAG;
|
||
|
|
|
||
|
|
if ((value & PCI_STATUS_DETECTED_PARITY)
|
||
|
|
&& (lo & SB_PARE_ERR_EN))
|
||
|
|
temp |= SB_PARE_ERR_FLAG;
|
||
|
|
|
||
|
|
lo = temp;
|
||
|
|
_wrmsr(SB_MSR_REG(SB_ERROR), hi, lo);
|
||
|
|
break;
|
||
|
|
case PCI_CACHE_LINE_SIZE:
|
||
|
|
value &= 0x0000ff00;
|
||
|
|
_rdmsr(SB_MSR_REG(SB_CTRL), &hi, &lo);
|
||
|
|
hi &= 0xffffff00;
|
||
|
|
hi |= (value >> 8);
|
||
|
|
_wrmsr(SB_MSR_REG(SB_CTRL), hi, lo);
|
||
|
|
break;
|
||
|
|
case PCI_BAR0_REG:
|
||
|
|
pci_isa_write_bar(0, value);
|
||
|
|
break;
|
||
|
|
case PCI_BAR1_REG:
|
||
|
|
pci_isa_write_bar(1, value);
|
||
|
|
break;
|
||
|
|
case PCI_BAR2_REG:
|
||
|
|
pci_isa_write_bar(2, value);
|
||
|
|
break;
|
||
|
|
case PCI_BAR3_REG:
|
||
|
|
pci_isa_write_bar(3, value);
|
||
|
|
break;
|
||
|
|
case PCI_BAR4_REG:
|
||
|
|
pci_isa_write_bar(4, value);
|
||
|
|
break;
|
||
|
|
case PCI_BAR5_REG:
|
||
|
|
pci_isa_write_bar(5, value);
|
||
|
|
break;
|
||
|
|
case PCI_UART1_INT_REG:
|
||
|
|
_rdmsr(DIVIL_MSR_REG(PIC_YSEL_HIGH), &hi, &lo);
|
||
|
|
/* disable uart1 interrupt in PIC */
|
||
|
|
lo &= ~(0xf << 24);
|
||
|
|
if (value) /* enable uart1 interrupt in PIC */
|
||
|
|
lo |= (CS5536_UART1_INTR << 24);
|
||
|
|
_wrmsr(DIVIL_MSR_REG(PIC_YSEL_HIGH), hi, lo);
|
||
|
|
break;
|
||
|
|
case PCI_UART2_INT_REG:
|
||
|
|
_rdmsr(DIVIL_MSR_REG(PIC_YSEL_HIGH), &hi, &lo);
|
||
|
|
/* disable uart2 interrupt in PIC */
|
||
|
|
lo &= ~(0xf << 28);
|
||
|
|
if (value) /* enable uart2 interrupt in PIC */
|
||
|
|
lo |= (CS5536_UART2_INTR << 28);
|
||
|
|
_wrmsr(DIVIL_MSR_REG(PIC_YSEL_HIGH), hi, lo);
|
||
|
|
break;
|
||
|
|
case PCI_ISA_FIXUP_REG:
|
||
|
|
if (value) {
|
||
|
|
/* enable the TARGET ABORT/MASTER ABORT etc. */
|
||
|
|
_rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
|
||
|
|
lo |= 0x00000063;
|
||
|
|
_wrmsr(SB_MSR_REG(SB_ERROR), hi, lo);
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
/* ALL OTHER PCI CONFIG SPACE HEADER IS NOT IMPLEMENTED. */
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* isa_read: ISA read transfers
|
||
|
|
*
|
||
|
|
* We assume that this is not a bus master transfer.
|
||
|
|
*/
|
||
|
|
u32 pci_isa_read_reg(int reg)
|
||
|
|
{
|
||
|
|
u32 conf_data = 0;
|
||
|
|
u32 hi, lo;
|
||
|
|
|
||
|
|
switch (reg) {
|
||
|
|
case PCI_VENDOR_ID:
|
||
|
|
conf_data =
|
||
|
|
CFG_PCI_VENDOR_ID(CS5536_ISA_DEVICE_ID, CS5536_VENDOR_ID);
|
||
|
|
break;
|
||
|
|
case PCI_COMMAND:
|
||
|
|
/* we just check the first LBAR for the IO enable bit, */
|
||
|
|
/* maybe we should changed later. */
|
||
|
|
_rdmsr(DIVIL_MSR_REG(DIVIL_LBAR_SMB), &hi, &lo);
|
||
|
|
if (hi & 0x01)
|
||
|
|
conf_data |= PCI_COMMAND_IO;
|
||
|
|
break;
|
||
|
|
case PCI_STATUS:
|
||
|
|
conf_data |= PCI_STATUS_66MHZ;
|
||
|
|
conf_data |= PCI_STATUS_DEVSEL_MEDIUM;
|
||
|
|
conf_data |= PCI_STATUS_FAST_BACK;
|
||
|
|
|
||
|
|
_rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
|
||
|
|
if (lo & SB_TAS_ERR_FLAG)
|
||
|
|
conf_data |= PCI_STATUS_SIG_TARGET_ABORT;
|
||
|
|
if (lo & SB_TAR_ERR_FLAG)
|
||
|
|
conf_data |= PCI_STATUS_REC_TARGET_ABORT;
|
||
|
|
if (lo & SB_MAR_ERR_FLAG)
|
||
|
|
conf_data |= PCI_STATUS_REC_MASTER_ABORT;
|
||
|
|
if (lo & SB_PARE_ERR_FLAG)
|
||
|
|
conf_data |= PCI_STATUS_DETECTED_PARITY;
|
||
|
|
break;
|
||
|
|
case PCI_CLASS_REVISION:
|
||
|
|
_rdmsr(GLCP_MSR_REG(GLCP_CHIP_REV_ID), &hi, &lo);
|
||
|
|
conf_data = lo & 0x000000ff;
|
||
|
|
conf_data |= (CS5536_ISA_CLASS_CODE << 8);
|
||
|
|
break;
|
||
|
|
case PCI_CACHE_LINE_SIZE:
|
||
|
|
_rdmsr(SB_MSR_REG(SB_CTRL), &hi, &lo);
|
||
|
|
hi &= 0x000000f8;
|
||
|
|
conf_data = CFG_PCI_CACHE_LINE_SIZE(PCI_BRIDGE_HEADER_TYPE, hi);
|
||
|
|
break;
|
||
|
|
/*
|
||
|
|
* we only use the LBAR of DIVIL, no RCONF used.
|
||
|
|
* all of them are IO space.
|
||
|
|
*/
|
||
|
|
case PCI_BAR0_REG:
|
||
|
|
return pci_isa_read_bar(0);
|
||
|
|
break;
|
||
|
|
case PCI_BAR1_REG:
|
||
|
|
return pci_isa_read_bar(1);
|
||
|
|
break;
|
||
|
|
case PCI_BAR2_REG:
|
||
|
|
return pci_isa_read_bar(2);
|
||
|
|
break;
|
||
|
|
case PCI_BAR3_REG:
|
||
|
|
break;
|
||
|
|
case PCI_BAR4_REG:
|
||
|
|
return pci_isa_read_bar(4);
|
||
|
|
break;
|
||
|
|
case PCI_BAR5_REG:
|
||
|
|
return pci_isa_read_bar(5);
|
||
|
|
break;
|
||
|
|
case PCI_CARDBUS_CIS:
|
||
|
|
conf_data = PCI_CARDBUS_CIS_POINTER;
|
||
|
|
break;
|
||
|
|
case PCI_SUBSYSTEM_VENDOR_ID:
|
||
|
|
conf_data =
|
||
|
|
CFG_PCI_VENDOR_ID(CS5536_ISA_SUB_ID, CS5536_SUB_VENDOR_ID);
|
||
|
|
break;
|
||
|
|
case PCI_ROM_ADDRESS:
|
||
|
|
conf_data = PCI_EXPANSION_ROM_BAR;
|
||
|
|
break;
|
||
|
|
case PCI_CAPABILITY_LIST:
|
||
|
|
conf_data = PCI_CAPLIST_POINTER;
|
||
|
|
break;
|
||
|
|
case PCI_INTERRUPT_LINE:
|
||
|
|
/* no interrupt used here */
|
||
|
|
conf_data = CFG_PCI_INTERRUPT_LINE(0x00, 0x00);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return conf_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The mfgpt timer interrupt is running early, so we must keep the south bridge
|
||
|
|
* mmio always enabled. Otherwise we may race with the PCI configuration which
|
||
|
|
* may temporarily disable it. When that happens and the timer interrupt fires,
|
||
|
|
* we are not able to clear it and the system will hang.
|
||
|
|
*/
|
||
|
|
static void cs5536_isa_mmio_always_on(struct pci_dev *dev)
|
||
|
|
{
|
||
|
|
dev->mmio_always_on = 1;
|
||
|
|
}
|
||
|
|
DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
|
||
|
|
PCI_CLASS_BRIDGE_ISA, 8, cs5536_isa_mmio_always_on);
|