/*
* manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
*
- * based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/errno.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/bitmap.h>
+#include <linux/mutex.h>
#include "base.h"
-DECLARE_MUTEX(pnp_res_mutex);
+DEFINE_MUTEX(pnp_res_mutex);
static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
{
resource_size_t *start, *end;
unsigned long *flags;
- if (!dev || !rule)
- return -EINVAL;
-
if (idx >= PNP_MAX_PORT) {
- pnp_err
- ("More than 4 ports is incompatible with pnp specifications.");
+ dev_err(&dev->dev, "too many I/O port resources\n");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
resource_size_t *start, *end;
unsigned long *flags;
- if (!dev || !rule)
- return -EINVAL;
-
if (idx >= PNP_MAX_MEM) {
- pnp_err
- ("More than 8 mems is incompatible with pnp specifications.");
+ dev_err(&dev->dev, "too many memory resources\n");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
};
- if (!dev || !rule)
- return -EINVAL;
-
if (idx >= PNP_MAX_IRQ) {
- pnp_err
- ("More than 2 irqs is incompatible with pnp specifications.");
+ dev_err(&dev->dev, "too many IRQ resources\n");
/* pretend we were successful so at least the manager won't try again */
return 1;
}
return 0;
}
-static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
+static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
{
resource_size_t *start, *end;
unsigned long *flags;
1, 3, 5, 6, 7, 0, 2, 4
};
- if (!dev || !rule)
- return -EINVAL;
-
if (idx >= PNP_MAX_DMA) {
- pnp_err
- ("More than 2 dmas is incompatible with pnp specifications.");
- /* pretend we were successful so at least the manager won't try again */
- return 1;
+ dev_err(&dev->dev, "too many DMA resources\n");
+ return;
}
/* check if this resource has been manually set, if so skip */
if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO))
- return 1;
+ return;
start = &dev->res.dma_resource[idx].start;
end = &dev->res.dma_resource[idx].end;
*flags |= rule->flags | IORESOURCE_DMA;
*flags &= ~IORESOURCE_UNSET;
- if (!rule->map) {
- *flags |= IORESOURCE_DISABLED;
- return 1; /* skip disabled resource requests */
- }
-
for (i = 0; i < 8; i++) {
if (rule->map & (1 << xtab[i])) {
*start = *end = xtab[i];
if (pnp_check_dma(dev, idx))
- return 1;
+ return;
}
}
- return 0;
+#ifdef MAX_DMA_CHANNELS
+ *start = *end = MAX_DMA_CHANNELS;
+#endif
+ *flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
}
/**
* pnp_init_resources - Resets a resource table to default values.
* @table: pointer to the desired resource table
- *
*/
void pnp_init_resource_table(struct pnp_resource_table *table)
{
int idx;
+
for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
table->irq_resource[idx].name = NULL;
table->irq_resource[idx].start = -1;
/**
* pnp_clean_resources - clears resources that were not manually set
* @res: the resources to clean
- *
*/
static void pnp_clean_resource_table(struct pnp_resource_table *res)
{
int idx;
+
for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO))
continue;
if (!pnp_can_configure(dev))
return -ENODEV;
- down(&pnp_res_mutex);
+ mutex_lock(&pnp_res_mutex);
pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
if (dev->independent) {
port = dev->independent->port;
irq = irq->next;
}
while (dma) {
- if (!pnp_assign_dma(dev, dma, ndma))
- goto fail;
+ pnp_assign_dma(dev, dma, ndma);
ndma++;
dma = dma->next;
}
irq = irq->next;
}
while (dma) {
- if (!pnp_assign_dma(dev, dma, ndma))
- goto fail;
+ pnp_assign_dma(dev, dma, ndma);
ndma++;
dma = dma->next;
}
} else if (dev->dependent)
goto fail;
- up(&pnp_res_mutex);
+ mutex_unlock(&pnp_res_mutex);
return 1;
- fail:
+fail:
pnp_clean_resource_table(&dev->res);
- up(&pnp_res_mutex);
+ mutex_unlock(&pnp_res_mutex);
return 0;
}
{
int i;
struct pnp_resource_table *bak;
- if (!dev || !res)
- return -EINVAL;
+
if (!pnp_can_configure(dev))
return -ENODEV;
bak = pnp_alloc(sizeof(struct pnp_resource_table));
return -ENOMEM;
*bak = dev->res;
- down(&pnp_res_mutex);
+ mutex_lock(&pnp_res_mutex);
dev->res = *res;
if (!(mode & PNP_CONFIG_FORCE)) {
for (i = 0; i < PNP_MAX_PORT; i++) {
goto fail;
}
}
- up(&pnp_res_mutex);
+ mutex_unlock(&pnp_res_mutex);
kfree(bak);
return 0;
- fail:
+fail:
dev->res = *bak;
- up(&pnp_res_mutex);
+ mutex_unlock(&pnp_res_mutex);
kfree(bak);
return -EINVAL;
}
/**
* pnp_auto_config_dev - automatically assigns resources to a device
* @dev: pointer to the desired device
- *
*/
int pnp_auto_config_dev(struct pnp_dev *dev)
{
struct pnp_option *dep;
int i = 1;
- if (!dev)
- return -EINVAL;
-
if (!pnp_can_configure(dev)) {
- pnp_dbg("Device %s does not support resource configuration.",
- dev->dev.bus_id);
+ dev_dbg(&dev->dev, "configuration not supported\n");
return -ENODEV;
}
} while (dep);
}
- pnp_err("Unable to assign resources to device %s.", dev->dev.bus_id);
+ dev_err(&dev->dev, "unable to assign resources\n");
return -EBUSY;
}
* pnp_start_dev - low-level start of the PnP device
* @dev: pointer to the desired device
*
- * assumes that resources have alread been allocated
+ * assumes that resources have already been allocated
*/
-
int pnp_start_dev(struct pnp_dev *dev)
{
if (!pnp_can_write(dev)) {
- pnp_dbg("Device %s does not support activation.",
- dev->dev.bus_id);
+ dev_dbg(&dev->dev, "activation not supported\n");
return -EINVAL;
}
if (dev->protocol->set(dev, &dev->res) < 0) {
- pnp_err("Failed to activate device %s.", dev->dev.bus_id);
+ dev_err(&dev->dev, "activation failed\n");
return -EIO;
}
- pnp_info("Device %s activated.", dev->dev.bus_id);
-
+ dev_info(&dev->dev, "activated\n");
return 0;
}
*
* does not free resources
*/
-
int pnp_stop_dev(struct pnp_dev *dev)
{
if (!pnp_can_disable(dev)) {
- pnp_dbg("Device %s does not support disabling.",
- dev->dev.bus_id);
+ dev_dbg(&dev->dev, "disabling not supported\n");
return -EINVAL;
}
if (dev->protocol->disable(dev) < 0) {
- pnp_err("Failed to disable device %s.", dev->dev.bus_id);
+ dev_err(&dev->dev, "disable failed\n");
return -EIO;
}
- pnp_info("Device %s disabled.", dev->dev.bus_id);
-
+ dev_info(&dev->dev, "disabled\n");
return 0;
}
{
int error;
- if (!dev)
- return -EINVAL;
- if (dev->active) {
- return 0; /* the device is already active */
- }
+ if (dev->active)
+ return 0;
/* ensure resources are allocated */
if (pnp_auto_config_dev(dev))
return error;
dev->active = 1;
-
- return 1;
+ return 0;
}
/**
{
int error;
- if (!dev)
- return -EINVAL;
- if (!dev->active) {
- return 0; /* the device is already disabled */
- }
+ if (!dev->active)
+ return 0;
error = pnp_stop_dev(dev);
if (error)
dev->active = 0;
/* release the resources so that other devices can use them */
- down(&pnp_res_mutex);
+ mutex_lock(&pnp_res_mutex);
pnp_clean_resource_table(&dev->res);
- up(&pnp_res_mutex);
+ mutex_unlock(&pnp_res_mutex);
- return 1;
+ return 0;
}
/**
* @resource: pointer to resource to be changed
* @start: start of region
* @size: size of region
- *
*/
void pnp_resource_change(struct resource *resource, resource_size_t start,
resource_size_t size)
{
- if (resource == NULL)
- return;
resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET);
resource->start = start;
resource->end = start + size - 1;
}
EXPORT_SYMBOL(pnp_manual_config_dev);
-#if 0
-EXPORT_SYMBOL(pnp_auto_config_dev);
-#endif
EXPORT_SYMBOL(pnp_start_dev);
EXPORT_SYMBOL(pnp_stop_dev);
EXPORT_SYMBOL(pnp_activate_dev);
projects / linux-2.6 / blobdiff