2005-04-17 00:20:36 +02:00
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/*
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* manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
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*
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2007-10-15 09:50:19 +02:00
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* based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
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2005-04-17 00:20:36 +02:00
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* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/pnp.h>
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2005-10-31 00:03:48 +01:00
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#include <linux/slab.h>
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#include <linux/bitmap.h>
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2005-04-17 00:20:36 +02:00
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#include "base.h"
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DECLARE_MUTEX(pnp_res_mutex);
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static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
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{
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2006-06-13 02:07:07 +02:00
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resource_size_t *start, *end;
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unsigned long *flags;
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2005-04-17 00:20:36 +02:00
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if (idx >= PNP_MAX_PORT) {
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2007-07-26 19:41:20 +02:00
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pnp_err
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("More than 4 ports is incompatible with pnp specifications.");
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2005-04-17 00:20:36 +02:00
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/* pretend we were successful so at least the manager won't try again */
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return 1;
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}
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/* check if this resource has been manually set, if so skip */
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if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO))
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return 1;
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start = &dev->res.port_resource[idx].start;
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end = &dev->res.port_resource[idx].end;
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flags = &dev->res.port_resource[idx].flags;
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/* set the initial values */
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*flags |= rule->flags | IORESOURCE_IO;
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2007-07-26 19:41:20 +02:00
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*flags &= ~IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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if (!rule->size) {
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*flags |= IORESOURCE_DISABLED;
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2007-07-26 19:41:20 +02:00
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return 1; /* skip disabled resource requests */
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2005-04-17 00:20:36 +02:00
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}
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*start = rule->min;
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*end = *start + rule->size - 1;
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/* run through until pnp_check_port is happy */
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while (!pnp_check_port(dev, idx)) {
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*start += rule->align;
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*end = *start + rule->size - 1;
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if (*start > rule->max || !rule->align)
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return 0;
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}
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return 1;
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}
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static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
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{
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2006-06-13 02:07:07 +02:00
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resource_size_t *start, *end;
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unsigned long *flags;
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2005-04-17 00:20:36 +02:00
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if (idx >= PNP_MAX_MEM) {
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2007-07-26 19:41:20 +02:00
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pnp_err
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("More than 8 mems is incompatible with pnp specifications.");
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2005-04-17 00:20:36 +02:00
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/* pretend we were successful so at least the manager won't try again */
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return 1;
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}
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/* check if this resource has been manually set, if so skip */
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if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO))
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return 1;
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start = &dev->res.mem_resource[idx].start;
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end = &dev->res.mem_resource[idx].end;
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flags = &dev->res.mem_resource[idx].flags;
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/* set the initial values */
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*flags |= rule->flags | IORESOURCE_MEM;
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2007-07-26 19:41:20 +02:00
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*flags &= ~IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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/* convert pnp flags to standard Linux flags */
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if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
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*flags |= IORESOURCE_READONLY;
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if (rule->flags & IORESOURCE_MEM_CACHEABLE)
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*flags |= IORESOURCE_CACHEABLE;
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if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
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*flags |= IORESOURCE_RANGELENGTH;
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if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
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*flags |= IORESOURCE_SHADOWABLE;
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if (!rule->size) {
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*flags |= IORESOURCE_DISABLED;
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2007-07-26 19:41:20 +02:00
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return 1; /* skip disabled resource requests */
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2005-04-17 00:20:36 +02:00
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}
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*start = rule->min;
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2007-07-26 19:41:20 +02:00
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*end = *start + rule->size - 1;
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2005-04-17 00:20:36 +02:00
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/* run through until pnp_check_mem is happy */
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while (!pnp_check_mem(dev, idx)) {
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*start += rule->align;
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*end = *start + rule->size - 1;
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if (*start > rule->max || !rule->align)
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return 0;
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}
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return 1;
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}
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2007-07-26 19:41:20 +02:00
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static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
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2005-04-17 00:20:36 +02:00
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{
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2006-06-13 02:07:07 +02:00
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resource_size_t *start, *end;
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unsigned long *flags;
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2005-04-17 00:20:36 +02:00
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int i;
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/* IRQ priority: this table is good for i386 */
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static unsigned short xtab[16] = {
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5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
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};
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if (idx >= PNP_MAX_IRQ) {
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2007-07-26 19:41:20 +02:00
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pnp_err
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("More than 2 irqs is incompatible with pnp specifications.");
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2005-04-17 00:20:36 +02:00
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/* pretend we were successful so at least the manager won't try again */
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return 1;
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}
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/* check if this resource has been manually set, if so skip */
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if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO))
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return 1;
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start = &dev->res.irq_resource[idx].start;
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end = &dev->res.irq_resource[idx].end;
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flags = &dev->res.irq_resource[idx].flags;
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/* set the initial values */
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*flags |= rule->flags | IORESOURCE_IRQ;
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2007-07-26 19:41:20 +02:00
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*flags &= ~IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
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*flags |= IORESOURCE_DISABLED;
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2007-07-26 19:41:20 +02:00
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return 1; /* skip disabled resource requests */
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2005-04-17 00:20:36 +02:00
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}
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/* TBD: need check for >16 IRQ */
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*start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
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if (*start < PNP_IRQ_NR) {
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*end = *start;
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return 1;
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}
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for (i = 0; i < 16; i++) {
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2007-07-26 19:41:20 +02:00
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if (test_bit(xtab[i], rule->map)) {
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2005-04-17 00:20:36 +02:00
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*start = *end = xtab[i];
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2007-07-26 19:41:20 +02:00
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if (pnp_check_irq(dev, idx))
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2005-04-17 00:20:36 +02:00
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return 1;
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}
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}
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return 0;
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}
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2007-10-17 08:31:07 +02:00
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static void pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
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2005-04-17 00:20:36 +02:00
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{
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2006-06-13 02:07:07 +02:00
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resource_size_t *start, *end;
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unsigned long *flags;
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2005-04-17 00:20:36 +02:00
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int i;
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/* DMA priority: this table is good for i386 */
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static unsigned short xtab[8] = {
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1, 3, 5, 6, 7, 0, 2, 4
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};
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if (idx >= PNP_MAX_DMA) {
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2007-10-17 08:31:07 +02:00
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pnp_err("More than 2 dmas is incompatible with pnp "
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"specifications.");
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return;
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2005-04-17 00:20:36 +02:00
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}
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/* check if this resource has been manually set, if so skip */
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if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO))
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2007-10-17 08:31:07 +02:00
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return;
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2005-04-17 00:20:36 +02:00
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start = &dev->res.dma_resource[idx].start;
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end = &dev->res.dma_resource[idx].end;
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flags = &dev->res.dma_resource[idx].flags;
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/* set the initial values */
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*flags |= rule->flags | IORESOURCE_DMA;
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2007-07-26 19:41:20 +02:00
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*flags &= ~IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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for (i = 0; i < 8; i++) {
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2007-07-26 19:41:20 +02:00
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if (rule->map & (1 << xtab[i])) {
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2005-04-17 00:20:36 +02:00
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*start = *end = xtab[i];
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2007-07-26 19:41:20 +02:00
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if (pnp_check_dma(dev, idx))
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2007-10-17 08:31:07 +02:00
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return;
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2005-04-17 00:20:36 +02:00
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}
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}
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2007-10-17 08:31:07 +02:00
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#ifdef MAX_DMA_CHANNELS
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*start = *end = MAX_DMA_CHANNELS;
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#endif
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*flags |= IORESOURCE_UNSET | IORESOURCE_DISABLED;
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2005-04-17 00:20:36 +02:00
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}
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/**
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* pnp_init_resources - Resets a resource table to default values.
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* @table: pointer to the desired resource table
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*/
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void pnp_init_resource_table(struct pnp_resource_table *table)
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{
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int idx;
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2007-07-26 19:41:21 +02:00
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2005-04-17 00:20:36 +02:00
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for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
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table->irq_resource[idx].name = NULL;
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table->irq_resource[idx].start = -1;
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table->irq_resource[idx].end = -1;
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2007-07-26 19:41:20 +02:00
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table->irq_resource[idx].flags =
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IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_DMA; idx++) {
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table->dma_resource[idx].name = NULL;
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table->dma_resource[idx].start = -1;
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table->dma_resource[idx].end = -1;
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2007-07-26 19:41:20 +02:00
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table->dma_resource[idx].flags =
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IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_PORT; idx++) {
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table->port_resource[idx].name = NULL;
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table->port_resource[idx].start = 0;
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table->port_resource[idx].end = 0;
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2007-07-26 19:41:20 +02:00
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table->port_resource[idx].flags =
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IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_MEM; idx++) {
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table->mem_resource[idx].name = NULL;
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table->mem_resource[idx].start = 0;
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table->mem_resource[idx].end = 0;
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2007-07-26 19:41:20 +02:00
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table->mem_resource[idx].flags =
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IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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}
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/**
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* pnp_clean_resources - clears resources that were not manually set
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2005-05-01 17:59:26 +02:00
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* @res: the resources to clean
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2005-04-17 00:20:36 +02:00
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*/
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2007-07-26 19:41:20 +02:00
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static void pnp_clean_resource_table(struct pnp_resource_table *res)
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2005-04-17 00:20:36 +02:00
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{
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int idx;
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2007-07-26 19:41:21 +02:00
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2005-04-17 00:20:36 +02:00
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for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
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if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO))
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continue;
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res->irq_resource[idx].start = -1;
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res->irq_resource[idx].end = -1;
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2007-07-26 19:41:20 +02:00
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res->irq_resource[idx].flags =
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IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_DMA; idx++) {
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if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO))
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continue;
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res->dma_resource[idx].start = -1;
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res->dma_resource[idx].end = -1;
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2007-07-26 19:41:20 +02:00
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res->dma_resource[idx].flags =
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IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_PORT; idx++) {
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if (!(res->port_resource[idx].flags & IORESOURCE_AUTO))
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continue;
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res->port_resource[idx].start = 0;
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res->port_resource[idx].end = 0;
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2007-07-26 19:41:20 +02:00
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res->port_resource[idx].flags =
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IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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for (idx = 0; idx < PNP_MAX_MEM; idx++) {
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if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO))
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continue;
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res->mem_resource[idx].start = 0;
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res->mem_resource[idx].end = 0;
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2007-07-26 19:41:20 +02:00
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res->mem_resource[idx].flags =
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IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
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2005-04-17 00:20:36 +02:00
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}
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}
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/**
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* pnp_assign_resources - assigns resources to the device based on the specified dependent number
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* @dev: pointer to the desired device
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* @depnum: the dependent function number
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*
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* Only set depnum to 0 if the device does not have dependent options.
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*/
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static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
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{
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struct pnp_port *port;
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struct pnp_mem *mem;
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struct pnp_irq *irq;
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struct pnp_dma *dma;
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int nport = 0, nmem = 0, nirq = 0, ndma = 0;
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if (!pnp_can_configure(dev))
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return -ENODEV;
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down(&pnp_res_mutex);
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2007-07-26 19:41:20 +02:00
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pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
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2005-04-17 00:20:36 +02:00
|
|
|
if (dev->independent) {
|
|
|
|
port = dev->independent->port;
|
|
|
|
mem = dev->independent->mem;
|
|
|
|
irq = dev->independent->irq;
|
|
|
|
dma = dev->independent->dma;
|
|
|
|
while (port) {
|
|
|
|
if (!pnp_assign_port(dev, port, nport))
|
|
|
|
goto fail;
|
|
|
|
nport++;
|
|
|
|
port = port->next;
|
|
|
|
}
|
|
|
|
while (mem) {
|
|
|
|
if (!pnp_assign_mem(dev, mem, nmem))
|
|
|
|
goto fail;
|
|
|
|
nmem++;
|
|
|
|
mem = mem->next;
|
|
|
|
}
|
|
|
|
while (irq) {
|
|
|
|
if (!pnp_assign_irq(dev, irq, nirq))
|
|
|
|
goto fail;
|
|
|
|
nirq++;
|
|
|
|
irq = irq->next;
|
|
|
|
}
|
|
|
|
while (dma) {
|
2007-10-17 08:31:07 +02:00
|
|
|
pnp_assign_dma(dev, dma, ndma);
|
2005-04-17 00:20:36 +02:00
|
|
|
ndma++;
|
|
|
|
dma = dma->next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (depnum) {
|
|
|
|
struct pnp_option *dep;
|
|
|
|
int i;
|
2007-07-26 19:41:20 +02:00
|
|
|
for (i = 1, dep = dev->dependent; i < depnum;
|
|
|
|
i++, dep = dep->next)
|
|
|
|
if (!dep)
|
2005-04-17 00:20:36 +02:00
|
|
|
goto fail;
|
2007-07-26 19:41:20 +02:00
|
|
|
port = dep->port;
|
2005-04-17 00:20:36 +02:00
|
|
|
mem = dep->mem;
|
|
|
|
irq = dep->irq;
|
|
|
|
dma = dep->dma;
|
|
|
|
while (port) {
|
|
|
|
if (!pnp_assign_port(dev, port, nport))
|
|
|
|
goto fail;
|
|
|
|
nport++;
|
|
|
|
port = port->next;
|
|
|
|
}
|
|
|
|
while (mem) {
|
|
|
|
if (!pnp_assign_mem(dev, mem, nmem))
|
|
|
|
goto fail;
|
|
|
|
nmem++;
|
|
|
|
mem = mem->next;
|
|
|
|
}
|
|
|
|
while (irq) {
|
|
|
|
if (!pnp_assign_irq(dev, irq, nirq))
|
|
|
|
goto fail;
|
|
|
|
nirq++;
|
|
|
|
irq = irq->next;
|
|
|
|
}
|
|
|
|
while (dma) {
|
2007-10-17 08:31:07 +02:00
|
|
|
pnp_assign_dma(dev, dma, ndma);
|
2005-04-17 00:20:36 +02:00
|
|
|
ndma++;
|
|
|
|
dma = dma->next;
|
|
|
|
}
|
|
|
|
} else if (dev->dependent)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
up(&pnp_res_mutex);
|
|
|
|
return 1;
|
|
|
|
|
2007-08-15 18:32:08 +02:00
|
|
|
fail:
|
2005-04-17 00:20:36 +02:00
|
|
|
pnp_clean_resource_table(&dev->res);
|
|
|
|
up(&pnp_res_mutex);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pnp_manual_config_dev - Disables Auto Config and Manually sets the resource table
|
|
|
|
* @dev: pointer to the desired device
|
|
|
|
* @res: pointer to the new resource config
|
2005-06-24 07:05:21 +02:00
|
|
|
* @mode: 0 or PNP_CONFIG_FORCE
|
2005-04-17 00:20:36 +02:00
|
|
|
*
|
|
|
|
* This function can be used by drivers that want to manually set thier resources.
|
|
|
|
*/
|
2007-07-26 19:41:20 +02:00
|
|
|
int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table *res,
|
|
|
|
int mode)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
int i;
|
2007-07-26 19:41:20 +02:00
|
|
|
struct pnp_resource_table *bak;
|
2007-07-26 19:41:21 +02:00
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
if (!pnp_can_configure(dev))
|
|
|
|
return -ENODEV;
|
|
|
|
bak = pnp_alloc(sizeof(struct pnp_resource_table));
|
|
|
|
if (!bak)
|
|
|
|
return -ENOMEM;
|
|
|
|
*bak = dev->res;
|
|
|
|
|
|
|
|
down(&pnp_res_mutex);
|
|
|
|
dev->res = *res;
|
|
|
|
if (!(mode & PNP_CONFIG_FORCE)) {
|
|
|
|
for (i = 0; i < PNP_MAX_PORT; i++) {
|
2007-07-26 19:41:20 +02:00
|
|
|
if (!pnp_check_port(dev, i))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
for (i = 0; i < PNP_MAX_MEM; i++) {
|
2007-07-26 19:41:20 +02:00
|
|
|
if (!pnp_check_mem(dev, i))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
for (i = 0; i < PNP_MAX_IRQ; i++) {
|
2007-07-26 19:41:20 +02:00
|
|
|
if (!pnp_check_irq(dev, i))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
for (i = 0; i < PNP_MAX_DMA; i++) {
|
2007-07-26 19:41:20 +02:00
|
|
|
if (!pnp_check_dma(dev, i))
|
2005-04-17 00:20:36 +02:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
up(&pnp_res_mutex);
|
|
|
|
|
|
|
|
kfree(bak);
|
|
|
|
return 0;
|
|
|
|
|
2007-08-15 18:32:08 +02:00
|
|
|
fail:
|
2005-04-17 00:20:36 +02:00
|
|
|
dev->res = *bak;
|
|
|
|
up(&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;
|
|
|
|
|
2007-07-26 19:41:20 +02:00
|
|
|
if (!pnp_can_configure(dev)) {
|
|
|
|
pnp_dbg("Device %s does not support resource configuration.",
|
|
|
|
dev->dev.bus_id);
|
2005-04-17 00:20:36 +02:00
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!dev->dependent) {
|
|
|
|
if (pnp_assign_resources(dev, 0))
|
|
|
|
return 0;
|
|
|
|
} else {
|
|
|
|
dep = dev->dependent;
|
|
|
|
do {
|
|
|
|
if (pnp_assign_resources(dev, i))
|
|
|
|
return 0;
|
|
|
|
dep = dep->next;
|
|
|
|
i++;
|
|
|
|
} while (dep);
|
|
|
|
}
|
|
|
|
|
|
|
|
pnp_err("Unable to assign resources to device %s.", dev->dev.bus_id);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
2005-11-29 09:09:32 +01:00
|
|
|
/**
|
|
|
|
* pnp_start_dev - low-level start of the PnP device
|
|
|
|
* @dev: pointer to the desired device
|
|
|
|
*
|
2007-07-26 19:41:21 +02:00
|
|
|
* assumes that resources have already been allocated
|
2005-11-29 09:09:32 +01:00
|
|
|
*/
|
|
|
|
int pnp_start_dev(struct pnp_dev *dev)
|
|
|
|
{
|
|
|
|
if (!pnp_can_write(dev)) {
|
2007-07-26 19:41:20 +02:00
|
|
|
pnp_dbg("Device %s does not support activation.",
|
|
|
|
dev->dev.bus_id);
|
2005-11-29 09:09:32 +01:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2007-07-26 19:41:20 +02:00
|
|
|
if (dev->protocol->set(dev, &dev->res) < 0) {
|
2005-11-29 09:09:32 +01:00
|
|
|
pnp_err("Failed to activate device %s.", dev->dev.bus_id);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
pnp_info("Device %s activated.", dev->dev.bus_id);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pnp_stop_dev - low-level disable of the PnP device
|
|
|
|
* @dev: pointer to the desired device
|
|
|
|
*
|
|
|
|
* does not free resources
|
|
|
|
*/
|
|
|
|
int pnp_stop_dev(struct pnp_dev *dev)
|
|
|
|
{
|
|
|
|
if (!pnp_can_disable(dev)) {
|
2007-07-26 19:41:20 +02:00
|
|
|
pnp_dbg("Device %s does not support disabling.",
|
|
|
|
dev->dev.bus_id);
|
2005-11-29 09:09:32 +01:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
2007-07-26 19:41:20 +02:00
|
|
|
if (dev->protocol->disable(dev) < 0) {
|
2005-11-29 09:09:32 +01:00
|
|
|
pnp_err("Failed to disable device %s.", dev->dev.bus_id);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
|
|
|
pnp_info("Device %s disabled.", dev->dev.bus_id);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 00:20:36 +02:00
|
|
|
/**
|
|
|
|
* pnp_activate_dev - activates a PnP device for use
|
|
|
|
* @dev: pointer to the desired device
|
|
|
|
*
|
|
|
|
* does not validate or set resources so be careful.
|
|
|
|
*/
|
|
|
|
int pnp_activate_dev(struct pnp_dev *dev)
|
|
|
|
{
|
2005-11-29 09:09:32 +01:00
|
|
|
int error;
|
|
|
|
|
2007-07-26 19:41:21 +02:00
|
|
|
if (dev->active)
|
2007-07-26 19:41:20 +02:00
|
|
|
return 0; /* the device is already active */
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
/* ensure resources are allocated */
|
|
|
|
if (pnp_auto_config_dev(dev))
|
|
|
|
return -EBUSY;
|
|
|
|
|
2005-11-29 09:09:32 +01:00
|
|
|
error = pnp_start_dev(dev);
|
|
|
|
if (error)
|
|
|
|
return error;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dev->active = 1;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pnp_disable_dev - disables device
|
|
|
|
* @dev: pointer to the desired device
|
|
|
|
*
|
|
|
|
* inform the correct pnp protocol so that resources can be used by other devices
|
|
|
|
*/
|
|
|
|
int pnp_disable_dev(struct pnp_dev *dev)
|
|
|
|
{
|
2005-11-29 09:09:32 +01:00
|
|
|
int error;
|
|
|
|
|
2007-07-26 19:41:21 +02:00
|
|
|
if (!dev->active)
|
2007-07-26 19:41:20 +02:00
|
|
|
return 0; /* the device is already disabled */
|
2005-04-17 00:20:36 +02:00
|
|
|
|
2005-11-29 09:09:32 +01:00
|
|
|
error = pnp_stop_dev(dev);
|
|
|
|
if (error)
|
|
|
|
return error;
|
2005-04-17 00:20:36 +02:00
|
|
|
|
|
|
|
dev->active = 0;
|
|
|
|
|
|
|
|
/* release the resources so that other devices can use them */
|
|
|
|
down(&pnp_res_mutex);
|
|
|
|
pnp_clean_resource_table(&dev->res);
|
|
|
|
up(&pnp_res_mutex);
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* pnp_resource_change - change one resource
|
|
|
|
* @resource: pointer to resource to be changed
|
|
|
|
* @start: start of region
|
|
|
|
* @size: size of region
|
|
|
|
*/
|
2006-06-13 02:07:07 +02:00
|
|
|
void pnp_resource_change(struct resource *resource, resource_size_t start,
|
2007-07-26 19:41:20 +02:00
|
|
|
resource_size_t size)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
resource->flags &= ~(IORESOURCE_AUTO | IORESOURCE_UNSET);
|
|
|
|
resource->start = start;
|
|
|
|
resource->end = start + size - 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(pnp_manual_config_dev);
|
2005-11-29 09:09:32 +01:00
|
|
|
EXPORT_SYMBOL(pnp_start_dev);
|
|
|
|
EXPORT_SYMBOL(pnp_stop_dev);
|
2005-04-17 00:20:36 +02:00
|
|
|
EXPORT_SYMBOL(pnp_activate_dev);
|
|
|
|
EXPORT_SYMBOL(pnp_disable_dev);
|
|
|
|
EXPORT_SYMBOL(pnp_resource_change);
|
|
|
|
EXPORT_SYMBOL(pnp_init_resource_table);
|