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/*
* This file is part of the coreboot project.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <superio/common/ssdt.h>
#include <device/device.h>
#include <device/pnp.h>
#include <arch/acpigen.h>
#include <arch/acpi.h>
#include <device/pnp_def.h>
#include <console/console.h>
#include <types.h>
struct superio_dev {
const char *acpi_hid;
u16 io_base[4];
u8 irq[2];
};
static const struct superio_dev superio_devs[] = {
{ACPI_HID_FDC, {0x3f0, 0x3f2, 0x3f7}, {6, } },
{ACPI_HID_KEYBOARD, {60, 64, }, {1, } },
{ACPI_HID_MOUSE, {60, 64, }, {12, } },
{ACPI_HID_COM, {0x3f8, 0x2f8, 0x3e8, 0x2e8}, {4, 3} },
{ACPI_HID_LPT, {0x378, }, {7, } },
};
static const u8 io_idx[] = {PNP_IDX_IO0, PNP_IDX_IO1, PNP_IDX_IO2, PNP_IDX_IO3};
static const u8 irq_idx[] = {PNP_IDX_IRQ0, PNP_IDX_IRQ1};
static const struct superio_dev *superio_guess_function(struct device *dev)
{
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base)
continue;
for (size_t j = 0; j < ARRAY_SIZE(superio_devs); j++) {
for (size_t k = 0; k < 4; k++) {
if (!superio_devs[j].io_base[k])
continue;
if (superio_devs[j].io_base[k] == res->base)
return &superio_devs[j];
}
}
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size)
continue;
for (size_t j = 0; j < ARRAY_SIZE(superio_devs); j++) {
for (size_t k = 0; k < 2; k++) {
if (!superio_devs[j].irq[k])
continue;
if (superio_devs[j].irq[k] == res->base)
return &superio_devs[j];
}
}
}
return NULL;
}
/* Return true if there are resources to report */
static bool has_resources(struct device *dev)
{
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base || !res->size)
continue;
return 1;
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size || res->base > 16)
continue;
return 1;
}
return 0;
}
/* Add IO and IRQ resources for _CRS or _PRS */
static void ldn_gen_resources(struct device *dev)
{
uint16_t irq = 0;
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base)
continue;
resource_t base = res->base;
resource_t size = res->size;
while (size > 0) {
resource_t sz = size > 255 ? 255 : size;
/* TODO: Needs test with regions >= 256 bytes */
acpigen_write_io16(base, base, 1, sz, 1);
size -= sz;
base += sz;
}
}
for (size_t i = 0; i < ARRAY_SIZE(irq_idx); i++) {
struct resource *res = probe_resource(dev, irq_idx[i]);
if (!res || !res->size || res->base >= 16)
continue;
irq |= 1 << res->base;
}
if (irq)
acpigen_write_irq(irq);
}
/* Add resource base and size for additional SuperIO code */
static void ldn_gen_resources_use(struct device *dev)
{
char name[5];
for (size_t i = 0; i < ARRAY_SIZE(io_idx); i++) {
struct resource *res = probe_resource(dev, io_idx[i]);
if (!res || !res->base || !res->size)
continue;
snprintf(name, sizeof(name), "IO%XB", i);
name[4] = '\0';
acpigen_write_name_integer(name, res->base);
snprintf(name, sizeof(name), "IO%XS", i);
name[4] = '\0';
acpigen_write_name_integer(name, res->size);
}
}
const char *superio_common_ldn_acpi_name(const struct device *dev)
{
u8 ldn = dev->path.pnp.device & 0xff;
u8 vldn = (dev->path.pnp.device >> 8) & 0x7;
static char name[5];
snprintf(name, sizeof(name), "L%02X%01X", ldn, vldn);
name[4] = '\0';
return name;
}
static const char *name_from_hid(const char *hid)
{
static const struct {
const char *hid;
const char *name;
} lookup[] = {
{ACPI_HID_FDC, "FDC" },
{ACPI_HID_KEYBOARD, "PS2 Keyboard" },
{ACPI_HID_MOUSE, "PS2 Mouse"},
{ACPI_HID_COM, "COM port" },
{ACPI_HID_LPT, "LPT" },
{ACPI_HID_PNP, "Generic PNP device" },
};
for (size_t i = 0; hid && i < ARRAY_SIZE(lookup); i++) {
if (strcmp(hid, lookup[i].hid) == 0)
return lookup[i].name;
}
return "Generic device";
}
void superio_common_fill_ssdt_generator(struct device *dev)
{
const char *scope = acpi_device_scope(dev);
const char *name = acpi_device_name(dev);
const u8 ldn = dev->path.pnp.device & 0xff;
const u8 vldn = (dev->path.pnp.device >> 8) & 0x7;
const char *hid;
if (!scope || !name) {
printk(BIOS_ERR, "%s: Missing ACPI path/scope\n", dev_path(dev));
return;
}
if (vldn) {
printk(BIOS_DEBUG, "%s: Ignoring virtual LDN\n", dev_path(dev));
return;
}
printk(BIOS_DEBUG, "%s.%s: %s\n", scope, name, dev_path(dev));
/* Scope */
acpigen_write_scope(scope);
/* Device */
acpigen_write_device(name);
acpigen_write_name_byte("_UID", 0);
acpigen_write_name_byte("LDN", ldn);
acpigen_write_name_byte("VLDN", vldn);
acpigen_write_STA(dev->enabled ? 0xf : 0);
if (!dev->enabled) {
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
return;
}
if (has_resources(dev)) {
/* Resources - _CRS */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
ldn_gen_resources(dev);
acpigen_write_resourcetemplate_footer();
/* Resources - _PRS */
acpigen_write_name("_PRS");
acpigen_write_resourcetemplate_header();
ldn_gen_resources(dev);
acpigen_write_resourcetemplate_footer();
/* Resources base and size for 3rd party ACPI code */
ldn_gen_resources_use(dev);
}
hid = acpi_device_hid(dev);
if (!hid) {
printk(BIOS_ERR, "%s: SuperIO driver doesn't provide a _HID\n", dev_path(dev));
/* Try to guess it... */
const struct superio_dev *sdev = superio_guess_function(dev);
if (sdev && sdev->acpi_hid) {
hid = sdev->acpi_hid;
printk(BIOS_WARNING, "%s: Guessed _HID is '%s'\n", dev_path(dev), hid);
} else {
hid = ACPI_HID_PNP;
printk(BIOS_ERR, "%s: Failed to guessed _HID\n", dev_path(dev));
}
}
acpigen_write_name_string("_HID", hid);
acpigen_write_name_string("_DDN", name_from_hid(hid));
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
}
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