blob: 8acef3b65a2a998c78b68dcf48c8d8a4550c2536 [file] [log] [blame]
/* Copyright 2004 Linux Networx */
/* This code is distrubted wihtout warrant under the GPL v2 (see COPYING) */
#include <console/console.h>
#include <stdlib.h>
#include <stdint.h>
#include <bitops.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, uint8_t reg, uint8_t value)
{
outb(reg, dev->path.u.pnp.port);
outb(value, dev->path.u.pnp.port + 1);
}
uint8_t pnp_read_config(device_t dev, uint8_t reg)
{
outb(reg, dev->path.u.pnp.port);
return inb(dev->path.u.pnp.port + 1);
}
void pnp_set_logical_device(device_t dev)
{
pnp_write_config(dev, 0x07, dev->path.u.pnp.device);
}
void pnp_set_enable(device_t dev, int enable)
{
pnp_write_config(dev, 0x30, enable?0x1:0x0);
}
int pnp_read_enable(device_t dev)
{
return !!pnp_read_config(dev, 0x30);
}
void pnp_set_iobase(device_t dev, unsigned index, unsigned 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, unsigned index, unsigned irq)
{
/* Index == 0x70 or 0x72 */
pnp_write_config(dev, index, irq);
}
void pnp_set_drq(device_t dev, unsigned index, unsigned 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_err("ERROR: %s %02x %s size: 0x%010Lx 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_err("ERROR: %s %02x 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)
{
int i;
/* Select the device */
pnp_set_logical_device(dev);
/* Paranoia says I should disable the device here... */
for(i = 0; i < dev->resources; i++) {
pnp_set_resource(dev, &dev->resource[i]);
}
}
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 opertations */
static void pnp_get_ioresource(device_t dev, unsigned index, struct io_info *info)
{
struct resource *resource;
unsigned moving, gran, step;
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;
}
}
void pnp_enable_devices(device_t base_dev, struct device_operations *ops,
unsigned functions, struct pnp_info *info)
{
struct device_path path;
device_t dev;
int i;
path.type = DEVICE_PATH_PNP;
path.u.pnp.port = base_dev->path.u.pnp.port;
/* Setup the ops and resources on the newly allocated devices */
for(i = 0; i < functions; i++) {
path.u.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]);
}
}