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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
* Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pnp.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <pc80/mc146818rtc.h>
#include <pc80/i8254.h>
#include <pc80/i8259.h>
#include <pc80/isa-dma.h>
#include <arch/io.h>
#include <arch/acpi.h>
#include "sb800.h"
static void lpc_init(struct device *dev)
{
u8 byte;
u32 dword;
struct device *sm_dev;
/* Enable the LPC Controller */
sm_dev = pcidev_on_root(0x14, 0);
dword = pci_read_config32(sm_dev, 0x64);
dword |= 1 << 20;
pci_write_config32(sm_dev, 0x64, dword);
/* Initialize isa dma */
isa_dma_init();
/* Enable DMA transaction on the LPC bus */
byte = pci_read_config8(dev, 0x40);
byte |= (1 << 2);
pci_write_config8(dev, 0x40, byte);
/* Disable the timeout mechanism on LPC */
byte = pci_read_config8(dev, 0x48);
byte &= ~(1 << 7);
pci_write_config8(dev, 0x48, byte);
/* Disable LPC MSI Capability */
byte = pci_read_config8(dev, 0x78);
byte &= ~(1 << 1);
byte &= ~(1 << 0); /* Keep the old way. i.e., when bus master/DMA cycle is going
on on LPC, it holds PCI grant, so no LPC slave cycle can
interrupt and visit LPC. */
pci_write_config8(dev, 0x78, byte);
/* bit0: Enable prefetch a cacheline (64 bytes) when Host reads code from SPI ROM */
/* bit3: Fix SPI_CS# timing issue when running at 66M. TODO:A12. */
byte = pci_read_config8(dev, 0xBB);
byte |= 1 << 0 | 1 << 3;
pci_write_config8(dev, 0xBB, byte);
cmos_check_update_date();
setup_i8259(); /* Initialize i8259 pic */
setup_i8254(); /* Initialize i8254 timers */
}
static void sb800_lpc_read_resources(struct device *dev)
{
struct resource *res;
/* Get the normal pci resources of this device */
pci_dev_read_resources(dev); /* We got one for APIC, or one more for TRAP */
pci_get_resource(dev, 0xA0); /* SPI ROM base address */
/* Add an extra subtractive resource for both memory and I/O. */
res = new_resource(dev, IOINDEX_SUBTRACTIVE(0, 0));
res->base = 0;
res->size = 0x1000;
res->flags = IORESOURCE_IO | IORESOURCE_SUBTRACTIVE |
IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
res = new_resource(dev, IOINDEX_SUBTRACTIVE(1, 0));
res->base = 0xff800000;
res->size = 0x00800000; /* 8 MB for flash */
res->flags = IORESOURCE_MEM | IORESOURCE_SUBTRACTIVE |
IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
//res = new_resource(dev, 3);
//res->base = IO_APIC_ADDR;
//res->size = 0x00001000;
//res->flags = IORESOURCE_MEM | IORESOURCE_ASSIGNED | IORESOURCE_FIXED;
compact_resources(dev);
}
static void sb800_lpc_set_resources(struct device *dev)
{
struct resource *res;
pci_dev_set_resources(dev);
/* Special case. SPI Base Address. The SpiRomEnable should be set. */
res = find_resource(dev, 0xA0);
pci_write_config32(dev, 0xA0, res->base | 1 << 1);
}
/**
* @brief Enable resources for children devices
*
* @param dev the device whose children's resources are to be enabled
*
*/
static void sb800_lpc_enable_childrens_resources(struct device *dev)
{
struct bus *link;
u32 reg, reg_x;
int var_num = 0;
u16 reg_var[3] = {0x0, 0x0, 0x0};
u8 wiosize = pci_read_config8(dev, 0x74);
reg = pci_read_config32(dev, 0x44);
reg_x = pci_read_config32(dev, 0x48);
for (link = dev->link_list; link; link = link->next) {
struct device *child;
for (child = link->children; child;
child = child->sibling) {
if (child->enabled
&& (child->path.type == DEVICE_PATH_PNP)) {
struct resource *res;
for (res = child->resource_list; res; res = res->next) {
u32 base, end; /* don't need long long */
if (!(res->flags & IORESOURCE_IO))
continue;
base = res->base;
end = resource_end(res);
printk(BIOS_DEBUG, "sb800 lpc decode:%s, base=0x%08x, end=0x%08x\n",
dev_path(child), base, end);
switch (base) {
case 0x60: /* KB */
case 0x64: /* MS */
reg |= (1 << 29);
break;
case 0x3f8: /* COM1 */
reg |= (1 << 6);
break;
case 0x2f8: /* COM2 */
reg |= (1 << 7);
break;
case 0x378: /* Parallel 1 */
reg |= (1 << 0);
reg |= (1 << 1); /* + 0x778 for ECP */
break;
case 0x3f0: /* FD0 */
reg |= (1 << 26);
break;
case 0x220: /* Audio 0 */
reg |= (1 << 8);
break;
case 0x300: /* Midi 0 */
reg |= (1 << 18);
break;
case 0x400:
reg_x |= (1 << 16);
break;
case 0x480:
reg_x |= (1 << 17);
break;
case 0x500:
reg_x |= (1 << 18);
break;
case 0x580:
reg_x |= (1 << 19);
break;
case 0x4700:
reg_x |= (1 << 22);
break;
case 0xfd60:
reg_x |= (1 << 23);
break;
default:
if (var_num >= 3)
continue; /* only 3 var ; compact them ? */
switch (var_num) {
case 0:
reg_x |= (1 << 2);
if ((end - base) < 16)
wiosize |= (1 << 0);
break;
case 1:
reg_x |= (1 << 24);
if ((end - base) < 16)
wiosize |= (1 << 2);
break;
case 2:
reg_x |= (1 << 25);
reg_x |= (1 << 24);
if ((end - base) < 16)
wiosize |= (1 << 3);
break;
}
reg_var[var_num++] =
base & 0xffff;
}
}
}
}
}
pci_write_config32(dev, 0x44, reg);
pci_write_config32(dev, 0x48, reg_x);
/* Set WideIO for as many IOs found (fall through is on purpose) */
switch (var_num) {
case 2:
pci_write_config16(dev, 0x90, reg_var[2]);
case 1:
pci_write_config16(dev, 0x66, reg_var[1]);
case 0:
pci_write_config16(dev, 0x64, reg_var[0]);
break;
}
pci_write_config8(dev, 0x74, wiosize);
}
static void sb800_lpc_enable_resources(struct device *dev)
{
pci_dev_enable_resources(dev);
sb800_lpc_enable_childrens_resources(dev);
}
static struct pci_operations lops_pci = {
.set_subsystem = pci_dev_set_subsystem,
};
static struct device_operations lpc_ops = {
.read_resources = sb800_lpc_read_resources,
.set_resources = sb800_lpc_set_resources,
.enable_resources = sb800_lpc_enable_resources,
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
.write_acpi_tables = acpi_write_hpet,
#endif
.init = lpc_init,
.scan_bus = scan_lpc_bus,
.ops_pci = &lops_pci,
};
static const struct pci_driver lpc_driver __pci_driver = {
.ops = &lpc_ops,
.vendor = PCI_VENDOR_ID_ATI,
.device = PCI_DEVICE_ID_ATI_SB800_LPC,
};
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