blob: 2cbc0fa2e173d9cb634fadf9c324fc567b48bb91 [file] [log] [blame]
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2004 Linux Networx
* (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx)
* Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov>
* Copyright (C) 2005 Tyan
* (Written by Yinghai Lu <yhlu@tyan.com> for Tyan)
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <console/console.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <arch/io.h>
#include <device/device.h>
#include <device/pnp.h>
/* PNP fundamental operations */
void pnp_write_config(device_t dev, u8 reg, u8 value)
{
outb(reg, dev->path.pnp.port);
outb(value, dev->path.pnp.port + 1);
}
u8 pnp_read_config(device_t dev, u8 reg)
{
outb(reg, dev->path.pnp.port);
return inb(dev->path.pnp.port + 1);
}
void pnp_set_logical_device(device_t dev)
{
pnp_write_config(dev, 0x07, dev->path.pnp.device & 0xff);
}
void pnp_set_enable(device_t dev, int enable)
{
u8 tmp, bitpos;
tmp = pnp_read_config(dev, 0x30);
/* Handle virtual devices, which share the same LDN register. */
bitpos = (dev->path.pnp.device >> 8) & 0x7;
if (enable)
tmp |= (1 << bitpos);
else
tmp &= ~(1 << bitpos);
pnp_write_config(dev, 0x30, tmp);
}
int pnp_read_enable(device_t dev)
{
u8 tmp, bitpos;
tmp = pnp_read_config(dev, 0x30);
/* Handle virtual devices, which share the same LDN register. */
bitpos = (dev->path.pnp.device >> 8) & 0x7;
return !!(tmp & (1 << bitpos));
}
void pnp_set_iobase(device_t dev, u8 index, u16 iobase)
{
/* Index == 0x60 or 0x62. */
pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff);
pnp_write_config(dev, index + 1, iobase & 0xff);
}
void pnp_set_irq(device_t dev, u8 index, u8 irq)
{
/* Index == 0x70 or 0x72. */
pnp_write_config(dev, index, irq);
}
void pnp_set_drq(device_t dev, u8 index, u8 drq)
{
/* Index == 0x74. */
pnp_write_config(dev, index, drq & 0xff);
}
/* PNP device operations */
void pnp_read_resources(device_t dev)
{
return;
}
static void pnp_set_resource(device_t dev, struct resource *resource)
{
if (!(resource->flags & IORESOURCE_ASSIGNED)) {
printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010llx "
"not assigned\n", dev_path(dev), resource->index,
resource_type(resource), resource->size);
return;
}
/* Now store the resource. */
if (resource->flags & IORESOURCE_IO) {
pnp_set_iobase(dev, resource->index, resource->base);
} else if (resource->flags & IORESOURCE_DRQ) {
pnp_set_drq(dev, resource->index, resource->base);
} else if (resource->flags & IORESOURCE_IRQ) {
pnp_set_irq(dev, resource->index, resource->base);
} else {
printk(BIOS_ERR, "ERROR: %s %02lx unknown resource type\n",
dev_path(dev), resource->index);
return;
}
resource->flags |= IORESOURCE_STORED;
report_resource_stored(dev, resource, "");
}
void pnp_set_resources(device_t dev)
{
struct resource *res;
/* Select the logical device (LDN). */
pnp_set_logical_device(dev);
/* Paranoia says I should disable the device here... */
for (res = dev->resource_list; res; res = res->next)
pnp_set_resource(dev, res);
}
void pnp_enable_resources(device_t dev)
{
pnp_set_logical_device(dev);
pnp_set_enable(dev, 1);
}
void pnp_enable(device_t dev)
{
if (!dev->enabled) {
pnp_set_logical_device(dev);
pnp_set_enable(dev, 0);
}
}
struct device_operations pnp_ops = {
.read_resources = pnp_read_resources,
.set_resources = pnp_set_resources,
.enable_resources = pnp_enable_resources,
.enable = pnp_enable,
};
/* PNP chip operations */
static void pnp_get_ioresource(device_t dev, u8 index, struct io_info *info)
{
struct resource *resource;
unsigned moving, gran, step;
if (!info->mask) {
printk(BIOS_ERR, "ERROR: device %s index %d has no mask.\n",
dev_path(dev), index);
return;
}
resource = new_resource(dev, index);
/* Initilize the resource. */
resource->limit = 0xffff;
resource->flags |= IORESOURCE_IO;
/* Get the resource size... */
moving = info->mask;
gran = 15;
step = 1 << gran;
/* Find the first bit that moves. */
while ((moving & step) == 0) {
gran--;
step >>= 1;
}
/* Now find the first bit that does not move. */
while ((moving & step) != 0) {
gran--;
step >>= 1;
}
/*
* Of the moving bits the last bit in the first group,
* tells us the size of this resource.
*/
if ((moving & step) == 0) {
gran++;
step <<= 1;
}
/* Set the resource size and alignment. */
resource->gran = gran;
resource->align = gran;
resource->limit = info->mask | (step - 1);
resource->size = 1 << gran;
}
static void get_resources(device_t dev, struct pnp_info *info)
{
struct resource *resource;
if (info->flags & PNP_IO0)
pnp_get_ioresource(dev, PNP_IDX_IO0, &info->io0);
if (info->flags & PNP_IO1)
pnp_get_ioresource(dev, PNP_IDX_IO1, &info->io1);
if (info->flags & PNP_IO2)
pnp_get_ioresource(dev, PNP_IDX_IO2, &info->io2);
if (info->flags & PNP_IO3)
pnp_get_ioresource(dev, PNP_IDX_IO3, &info->io3);
if (info->flags & PNP_IRQ0) {
resource = new_resource(dev, PNP_IDX_IRQ0);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_IRQ1) {
resource = new_resource(dev, PNP_IDX_IRQ1);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_DRQ0) {
resource = new_resource(dev, PNP_IDX_DRQ0);
resource->size = 1;
resource->flags |= IORESOURCE_DRQ;
}
if (info->flags & PNP_DRQ1) {
resource = new_resource(dev, PNP_IDX_DRQ1);
resource->size = 1;
resource->flags |= IORESOURCE_DRQ;
}
/*
* These are not IRQs, but set the flag to have the
* resource allocator do the right thing.
*/
if (info->flags & PNP_EN) {
resource = new_resource(dev, PNP_IDX_EN);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_MSC0) {
resource = new_resource(dev, PNP_IDX_MSC0);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_MSC1) {
resource = new_resource(dev, PNP_IDX_MSC1);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_MSC4) {
resource = new_resource(dev, PNP_IDX_MSC4);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
if (info->flags & PNP_MSC10) {
resource = new_resource(dev, PNP_IDX_MSC10);
resource->size = 1;
resource->flags |= IORESOURCE_IRQ;
}
}
void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
unsigned int functions, struct pnp_info *info)
{
struct device_path path;
device_t dev;
int i;
path.type = DEVICE_PATH_PNP;
path.pnp.port = base_dev->path.pnp.port;
/* Setup the ops and resources on the newly allocated devices. */
for (i = 0; i < functions; i++) {
/* Skip logical devices this Super I/O doesn't have. */
if (info[i].function == -1)
continue;
path.pnp.device = info[i].function;
dev = alloc_find_dev(base_dev->bus, &path);
/* Don't initialize a device multiple times. */
if (dev->ops)
continue;
if (info[i].ops == 0)
dev->ops = ops;
else
dev->ops = info[i].ops;
get_resources(dev, &info[i]);
}
}