[net-next-2.6.git] / drivers / pnp / manager.c

/*
 * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
 *
 * based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
 * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
 *
 */

#include <linux/config.h>
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>

#ifdef CONFIG_PNP_DEBUG
	#define DEBUG
#else
	#undef DEBUG
#endif

#include <linux/pnp.h>
#include "base.h"

DECLARE_MUTEX(pnp_res_mutex);

static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
{
	unsigned long *start, *end, *flags;

	if (!dev || !rule)
		return -EINVAL;

	if (idx >= PNP_MAX_PORT) {
		pnp_err("More than 4 ports is incompatible with pnp specifications.");
		/* pretend we were successful so at least the manager won't try again */
		return 1;
	}

	/* check if this resource has been manually set, if so skip */
	if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO))
		return 1;

	start = &dev->res.port_resource[idx].start;
	end = &dev->res.port_resource[idx].end;
	flags = &dev->res.port_resource[idx].flags;

	/* set the initial values */
	*flags |= rule->flags | IORESOURCE_IO;
	*flags &=  ~IORESOURCE_UNSET;

	if (!rule->size) {
		*flags |= IORESOURCE_DISABLED;
		return 1; /* skip disabled resource requests */
	}

	*start = rule->min;
	*end = *start + rule->size - 1;

	/* run through until pnp_check_port is happy */
	while (!pnp_check_port(dev, idx)) {
		*start += rule->align;
		*end = *start + rule->size - 1;
		if (*start > rule->max || !rule->align)
			return 0;
	}
	return 1;
}

static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
{
	unsigned long *start, *end, *flags;

	if (!dev || !rule)
		return -EINVAL;

	if (idx >= PNP_MAX_MEM) {
		pnp_err("More than 8 mems is incompatible with pnp specifications.");
		/* pretend we were successful so at least the manager won't try again */
		return 1;
	}

	/* check if this resource has been manually set, if so skip */
	if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO))
		return 1;

	start = &dev->res.mem_resource[idx].start;
	end = &dev->res.mem_resource[idx].end;
	flags = &dev->res.mem_resource[idx].flags;

	/* set the initial values */
	*flags |= rule->flags | IORESOURCE_MEM;
	*flags &=  ~IORESOURCE_UNSET;

	/* convert pnp flags to standard Linux flags */
	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
		*flags |= IORESOURCE_READONLY;
	if (rule->flags & IORESOURCE_MEM_CACHEABLE)
		*flags |= IORESOURCE_CACHEABLE;
	if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
		*flags |= IORESOURCE_RANGELENGTH;
	if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
		*flags |= IORESOURCE_SHADOWABLE;

	if (!rule->size) {
		*flags |= IORESOURCE_DISABLED;
		return 1; /* skip disabled resource requests */
	}

	*start = rule->min;
	*end = *start + rule->size -1;

	/* run through until pnp_check_mem is happy */
	while (!pnp_check_mem(dev, idx)) {
		*start += rule->align;
		*end = *start + rule->size - 1;
		if (*start > rule->max || !rule->align)
			return 0;
	}
	return 1;
}

static int pnp_assign_irq(struct pnp_dev * dev, struct pnp_irq *rule, int idx)
{
	unsigned long *start, *end, *flags;
	int i;

	/* IRQ priority: this table is good for i386 */
	static unsigned short xtab[16] = {
		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.");
		/* pretend we were successful so at least the manager won't try again */
		return 1;
	}

	/* check if this resource has been manually set, if so skip */
	if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO))
		return 1;

	start = &dev->res.irq_resource[idx].start;
	end = &dev->res.irq_resource[idx].end;
	flags = &dev->res.irq_resource[idx].flags;

	/* set the initial values */
	*flags |= rule->flags | IORESOURCE_IRQ;
	*flags &=  ~IORESOURCE_UNSET;

	if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
		*flags |= IORESOURCE_DISABLED;
		return 1; /* skip disabled resource requests */
	}

	/* TBD: need check for >16 IRQ */
	*start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
	if (*start < PNP_IRQ_NR) {
		*end = *start;
		return 1;
	}
	for (i = 0; i < 16; i++) {
		if(test_bit(xtab[i], rule->map)) {
			*start = *end = xtab[i];
			if(pnp_check_irq(dev, idx))
				return 1;
		}
	}
	return 0;
}

static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
{
	unsigned long *start, *end, *flags;
	int i;

	/* DMA priority: this table is good for i386 */
	static unsigned short xtab[8] = {
		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;
	}

	/* check if this resource has been manually set, if so skip */
	if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO))
		return 1;

	start = &dev->res.dma_resource[idx].start;
	end = &dev->res.dma_resource[idx].end;
	flags = &dev->res.dma_resource[idx].flags;

	/* set the initial values */
	*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 0;
}

/**
 * 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;
		table->irq_resource[idx].end = -1;
		table->irq_resource[idx].flags = IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
		table->dma_resource[idx].name = NULL;
		table->dma_resource[idx].start = -1;
		table->dma_resource[idx].end = -1;
		table->dma_resource[idx].flags = IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
		table->port_resource[idx].name = NULL;
		table->port_resource[idx].start = 0;
		table->port_resource[idx].end = 0;
		table->port_resource[idx].flags = IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
		table->mem_resource[idx].name = NULL;
		table->mem_resource[idx].start = 0;
		table->mem_resource[idx].end = 0;
		table->mem_resource[idx].flags = IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
}

/**
 * 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;
		res->irq_resource[idx].start = -1;
		res->irq_resource[idx].end = -1;
		res->irq_resource[idx].flags = IORESOURCE_IRQ | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
		if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO))
			continue;
		res->dma_resource[idx].start = -1;
		res->dma_resource[idx].end = -1;
		res->dma_resource[idx].flags = IORESOURCE_DMA | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
		if (!(res->port_resource[idx].flags & IORESOURCE_AUTO))
			continue;
		res->port_resource[idx].start = 0;
		res->port_resource[idx].end = 0;
		res->port_resource[idx].flags = IORESOURCE_IO | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
		if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO))
			continue;
		res->mem_resource[idx].start = 0;
		res->mem_resource[idx].end = 0;
		res->mem_resource[idx].flags = IORESOURCE_MEM | IORESOURCE_AUTO | IORESOURCE_UNSET;
	}
}

/**
 * pnp_assign_resources - assigns resources to the device based on the specified dependent number
 * @dev: pointer to the desired device
 * @depnum: the dependent function number
 *
 * Only set depnum to 0 if the device does not have dependent options.
 */
static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
{
	struct pnp_port *port;
	struct pnp_mem *mem;
	struct pnp_irq *irq;
	struct pnp_dma *dma;
	int nport = 0, nmem = 0, nirq = 0, ndma = 0;

	if (!pnp_can_configure(dev))
		return -ENODEV;

	down(&pnp_res_mutex);
	pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
	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) {
			if (!pnp_assign_dma(dev, dma, ndma))
				goto fail;
			ndma++;
			dma = dma->next;
		}
	}

	if (depnum) {
		struct pnp_option *dep;
		int i;
		for (i=1,dep=dev->dependent; i<depnum; i++, dep=dep->next)
			if(!dep)
				goto fail;
		port =dep->port;
		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) {
			if (!pnp_assign_dma(dev, dma, ndma))
				goto fail;
			ndma++;
			dma = dma->next;
		}
	} else if (dev->dependent)
		goto fail;

	up(&pnp_res_mutex);
	return 1;

fail:
	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
 *
 * This function can be used by drivers that want to manually set thier resources.
 */
int pnp_manual_config_dev(struct pnp_dev *dev, struct pnp_resource_table * res, int mode)
{
	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));
	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++) {
			if(!pnp_check_port(dev,i))
				goto fail;
		}
		for (i = 0; i < PNP_MAX_MEM; i++) {
			if(!pnp_check_mem(dev,i))
				goto fail;
		}
		for (i = 0; i < PNP_MAX_IRQ; i++) {
			if(!pnp_check_irq(dev,i))
				goto fail;
		}
		for (i = 0; i < PNP_MAX_DMA; i++) {
			if(!pnp_check_dma(dev,i))
				goto fail;
		}
	}
	up(&pnp_res_mutex);

	kfree(bak);
	return 0;

fail:
	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;

	if(!dev)
		return -EINVAL;

	if(!pnp_can_configure(dev)) {
		pnp_info("Device %s does not support resource configuration.", dev->dev.bus_id);
		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;
}

/**
 * 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)
{
	if (!dev)
		return -EINVAL;
	if (dev->active) {
		return 0; /* the device is already active */
	}

	/* ensure resources are allocated */
	if (pnp_auto_config_dev(dev))
		return -EBUSY;

	if (!pnp_can_write(dev)) {
		pnp_info("Device %s does not supported activation.", dev->dev.bus_id);
		return -EINVAL;
	}

	if (dev->protocol->set(dev, &dev->res)<0) {
		pnp_err("Failed to activate device %s.", dev->dev.bus_id);
		return -EIO;
	}

	dev->active = 1;
	pnp_info("Device %s activated.", dev->dev.bus_id);

	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)
{
        if (!dev)
                return -EINVAL;
	if (!dev->active) {
		return 0; /* the device is already disabled */
	}

	if (!pnp_can_disable(dev)) {
		pnp_info("Device %s does not supported disabling.", dev->dev.bus_id);
		return -EINVAL;
	}
	if (dev->protocol->disable(dev)<0) {
		pnp_err("Failed to disable device %s.", dev->dev.bus_id);
		return -EIO;
	}

	dev->active = 0;
	pnp_info("Device %s disabled.", dev->dev.bus_id);

	/* 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
 *
 */
void pnp_resource_change(struct resource *resource, unsigned long start, unsigned long 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);
EXPORT_SYMBOL(pnp_auto_config_dev);
EXPORT_SYMBOL(pnp_activate_dev);
EXPORT_SYMBOL(pnp_disable_dev);
EXPORT_SYMBOL(pnp_resource_change);
EXPORT_SYMBOL(pnp_init_resource_table);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
	3	*
	4	* based on isapnp.c resource management (c) Jaroslav Kysela <perex@suse.cz>
	5	* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
	6	*
	7	*/
	8
	9	#include <linux/config.h>
	10	#include <linux/errno.h>
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/kernel.h>
	14
	15	#ifdef CONFIG_PNP_DEBUG
	16	#define DEBUG
	17	#else
	18	#undef DEBUG
	19	#endif
	20
	21	#include <linux/pnp.h>
	22	#include "base.h"
	23
	24	DECLARE_MUTEX(pnp_res_mutex);
	25
	26	static int pnp_assign_port(struct pnp_dev dev, struct pnp_port rule, int idx)
	27	{
	28	unsigned long start, end, *flags;
	29
	30	if (!dev \|\| !rule)
	31	return -EINVAL;
	32
	33	if (idx >= PNP_MAX_PORT) {
	34	pnp_err("More than 4 ports is incompatible with pnp specifications.");
	35	/* pretend we were successful so at least the manager won't try again */
	36	return 1;
	37	}
	38
	39	/* check if this resource has been manually set, if so skip */
	40	if (!(dev->res.port_resource[idx].flags & IORESOURCE_AUTO))
	41	return 1;
	42
	43	start = &dev->res.port_resource[idx].start;
	44	end = &dev->res.port_resource[idx].end;
	45	flags = &dev->res.port_resource[idx].flags;
	46
	47	/* set the initial values */
	48	*flags \|= rule->flags \| IORESOURCE_IO;
	49	*flags &= ~IORESOURCE_UNSET;
	50
	51	if (!rule->size) {
	52	*flags \|= IORESOURCE_DISABLED;
	53	return 1; /* skip disabled resource requests */
	54	}
	55
	56	*start = rule->min;
	57	end = start + rule->size - 1;
	58
	59	/* run through until pnp_check_port is happy */
	60	while (!pnp_check_port(dev, idx)) {
	61	*start += rule->align;
	62	end = start + rule->size - 1;
	63	if (*start > rule->max \|\| !rule->align)
	64	return 0;
65	}
66	return 1;
67	}
68
69	static int pnp_assign_mem(struct pnp_dev dev, struct pnp_mem rule, int idx)
70	{
71	unsigned long start, end, *flags;
72
73	if (!dev \|\| !rule)
74	return -EINVAL;
75
76	if (idx >= PNP_MAX_MEM) {
77	pnp_err("More than 8 mems is incompatible with pnp specifications.");
78	/* pretend we were successful so at least the manager won't try again */
79	return 1;
80	}
81
82	/* check if this resource has been manually set, if so skip */
83	if (!(dev->res.mem_resource[idx].flags & IORESOURCE_AUTO))
84	return 1;
85
86	start = &dev->res.mem_resource[idx].start;
87	end = &dev->res.mem_resource[idx].end;
88	flags = &dev->res.mem_resource[idx].flags;
89
90	/* set the initial values */
91	*flags \|= rule->flags \| IORESOURCE_MEM;
92	*flags &= ~IORESOURCE_UNSET;
93
94	/* convert pnp flags to standard Linux flags */
95	if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
96	*flags \|= IORESOURCE_READONLY;
97	if (rule->flags & IORESOURCE_MEM_CACHEABLE)
98	*flags \|= IORESOURCE_CACHEABLE;
99	if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
100	*flags \|= IORESOURCE_RANGELENGTH;
101	if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
102	*flags \|= IORESOURCE_SHADOWABLE;
103
104	if (!rule->size) {
105	*flags \|= IORESOURCE_DISABLED;
106	return 1; /* skip disabled resource requests */
107	}
108
109	*start = rule->min;
110	end = start + rule->size -1;
111
112	/* run through until pnp_check_mem is happy */
113	while (!pnp_check_mem(dev, idx)) {
114	*start += rule->align;
115	end = start + rule->size - 1;
116	if (*start > rule->max \|\| !rule->align)
117	return 0;
118	}
119	return 1;
120	}
121
122	static int pnp_assign_irq(struct pnp_dev * dev, struct pnp_irq *rule, int idx)
123	{
124	unsigned long start, end, *flags;
125	int i;
126
127	/* IRQ priority: this table is good for i386 */
128	static unsigned short xtab[16] = {
129	5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
130	};
131
132	if (!dev \|\| !rule)
133	return -EINVAL;
134
135	if (idx >= PNP_MAX_IRQ) {
136	pnp_err("More than 2 irqs is incompatible with pnp specifications.");
137	/* pretend we were successful so at least the manager won't try again */
138	return 1;
139	}
140
141	/* check if this resource has been manually set, if so skip */
142	if (!(dev->res.irq_resource[idx].flags & IORESOURCE_AUTO))
143	return 1;
144
145	start = &dev->res.irq_resource[idx].start;
146	end = &dev->res.irq_resource[idx].end;
147	flags = &dev->res.irq_resource[idx].flags;
148
149	/* set the initial values */
150	*flags \|= rule->flags \| IORESOURCE_IRQ;
151	*flags &= ~IORESOURCE_UNSET;
152
153	if (bitmap_empty(rule->map, PNP_IRQ_NR)) {
154	*flags \|= IORESOURCE_DISABLED;
155	return 1; /* skip disabled resource requests */
156	}
157
158	/* TBD: need check for >16 IRQ */
159	*start = find_next_bit(rule->map, PNP_IRQ_NR, 16);
160	if (*start < PNP_IRQ_NR) {
161	end = start;
162	return 1;
163	}
164	for (i = 0; i < 16; i++) {
165	if(test_bit(xtab[i], rule->map)) {
166	start = end = xtab[i];
167	if(pnp_check_irq(dev, idx))
168	return 1;
169	}
170	}
171	return 0;
172	}
173
174	static int pnp_assign_dma(struct pnp_dev dev, struct pnp_dma rule, int idx)
175	{
176	unsigned long start, end, *flags;
177	int i;
178
179	/* DMA priority: this table is good for i386 */
180	static unsigned short xtab[8] = {
181	1, 3, 5, 6, 7, 0, 2, 4
182	};
183
184	if (!dev \|\| !rule)
185	return -EINVAL;
186
187	if (idx >= PNP_MAX_DMA) {
188	pnp_err("More than 2 dmas is incompatible with pnp specifications.");
189	/* pretend we were successful so at least the manager won't try again */
190	return 1;
191	}
192
193	/* check if this resource has been manually set, if so skip */
194	if (!(dev->res.dma_resource[idx].flags & IORESOURCE_AUTO))
195	return 1;
196
197	start = &dev->res.dma_resource[idx].start;
198	end = &dev->res.dma_resource[idx].end;
199	flags = &dev->res.dma_resource[idx].flags;
200
201	/* set the initial values */
202	*flags \|= rule->flags \| IORESOURCE_DMA;
203	*flags &= ~IORESOURCE_UNSET;
204
205	if (!rule->map) {
206	*flags \|= IORESOURCE_DISABLED;
207	return 1; /* skip disabled resource requests */
208	}
209
210	for (i = 0; i < 8; i++) {
211	if(rule->map & (1<<xtab[i])) {
212	start = end = xtab[i];
213	if(pnp_check_dma(dev, idx))
214	return 1;
215	}
216	}
217	return 0;
218	}
219
220	/**
221	* pnp_init_resources - Resets a resource table to default values.
222	* @table: pointer to the desired resource table
223	*
224	*/
225	void pnp_init_resource_table(struct pnp_resource_table *table)
226	{
227	int idx;
228	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
229	table->irq_resource[idx].name = NULL;
230	table->irq_resource[idx].start = -1;
231	table->irq_resource[idx].end = -1;
232	table->irq_resource[idx].flags = IORESOURCE_IRQ \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
233	}
234	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
235	table->dma_resource[idx].name = NULL;
236	table->dma_resource[idx].start = -1;
237	table->dma_resource[idx].end = -1;
238	table->dma_resource[idx].flags = IORESOURCE_DMA \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
239	}
240	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
241	table->port_resource[idx].name = NULL;
242	table->port_resource[idx].start = 0;
243	table->port_resource[idx].end = 0;
244	table->port_resource[idx].flags = IORESOURCE_IO \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
245	}
246	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
247	table->mem_resource[idx].name = NULL;
248	table->mem_resource[idx].start = 0;
249	table->mem_resource[idx].end = 0;
250	table->mem_resource[idx].flags = IORESOURCE_MEM \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
251	}
252	}
253
254	/**
255	* pnp_clean_resources - clears resources that were not manually set
67be2dd1	256	* @res: the resources to clean
1da177e4 LT	257	*
	258	*/
	259	static void pnp_clean_resource_table(struct pnp_resource_table * res)
	260	{
	261	int idx;
	262	for (idx = 0; idx < PNP_MAX_IRQ; idx++) {
	263	if (!(res->irq_resource[idx].flags & IORESOURCE_AUTO))
	264	continue;
	265	res->irq_resource[idx].start = -1;
	266	res->irq_resource[idx].end = -1;
	267	res->irq_resource[idx].flags = IORESOURCE_IRQ \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
	268	}
	269	for (idx = 0; idx < PNP_MAX_DMA; idx++) {
	270	if (!(res->dma_resource[idx].flags & IORESOURCE_AUTO))
	271	continue;
	272	res->dma_resource[idx].start = -1;
	273	res->dma_resource[idx].end = -1;
	274	res->dma_resource[idx].flags = IORESOURCE_DMA \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
	275	}
	276	for (idx = 0; idx < PNP_MAX_PORT; idx++) {
	277	if (!(res->port_resource[idx].flags & IORESOURCE_AUTO))
	278	continue;
	279	res->port_resource[idx].start = 0;
	280	res->port_resource[idx].end = 0;
	281	res->port_resource[idx].flags = IORESOURCE_IO \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
	282	}
	283	for (idx = 0; idx < PNP_MAX_MEM; idx++) {
	284	if (!(res->mem_resource[idx].flags & IORESOURCE_AUTO))
	285	continue;
	286	res->mem_resource[idx].start = 0;
	287	res->mem_resource[idx].end = 0;
	288	res->mem_resource[idx].flags = IORESOURCE_MEM \| IORESOURCE_AUTO \| IORESOURCE_UNSET;
	289	}
	290	}
	291
	292	/**
	293	* pnp_assign_resources - assigns resources to the device based on the specified dependent number
	294	* @dev: pointer to the desired device
	295	* @depnum: the dependent function number
	296	*
	297	* Only set depnum to 0 if the device does not have dependent options.
	298	*/
	299	static int pnp_assign_resources(struct pnp_dev *dev, int depnum)
	300	{
	301	struct pnp_port *port;
	302	struct pnp_mem *mem;
	303	struct pnp_irq *irq;
	304	struct pnp_dma *dma;
	305	int nport = 0, nmem = 0, nirq = 0, ndma = 0;
	306
	307	if (!pnp_can_configure(dev))
	308	return -ENODEV;
	309
	310	down(&pnp_res_mutex);
	311	pnp_clean_resource_table(&dev->res); /* start with a fresh slate */
	312	if (dev->independent) {
	313	port = dev->independent->port;
	314	mem = dev->independent->mem;
	315	irq = dev->independent->irq;
	316	dma = dev->independent->dma;
	317	while (port) {
	318	if (!pnp_assign_port(dev, port, nport))
	319	goto fail;
	320	nport++;
321	port = port->next;
322	}
323	while (mem) {
324	if (!pnp_assign_mem(dev, mem, nmem))
325	goto fail;
326	nmem++;
327	mem = mem->next;
328	}
329	while (irq) {
330	if (!pnp_assign_irq(dev, irq, nirq))
331	goto fail;
332	nirq++;
333	irq = irq->next;
334	}
335	while (dma) {
336	if (!pnp_assign_dma(dev, dma, ndma))
337	goto fail;
338	ndma++;
339	dma = dma->next;
340	}
341	}
342
343	if (depnum) {
344	struct pnp_option *dep;
345	int i;
346	for (i=1,dep=dev->dependent; i<depnum; i++, dep=dep->next)
347	if(!dep)
348	goto fail;
349	port =dep->port;
350	mem = dep->mem;
351	irq = dep->irq;
352	dma = dep->dma;
353	while (port) {
354	if (!pnp_assign_port(dev, port, nport))
355	goto fail;
356	nport++;
357	port = port->next;
358	}
359	while (mem) {
360	if (!pnp_assign_mem(dev, mem, nmem))
361	goto fail;
362	nmem++;
363	mem = mem->next;
364	}
365	while (irq) {
366	if (!pnp_assign_irq(dev, irq, nirq))
367	goto fail;
368	nirq++;
369	irq = irq->next;
370	}
371	while (dma) {
372	if (!pnp_assign_dma(dev, dma, ndma))
373	goto fail;
374	ndma++;
375	dma = dma->next;
376	}
377	} else if (dev->dependent)
378	goto fail;
379
380	up(&pnp_res_mutex);
381	return 1;
382
383	fail:
384	pnp_clean_resource_table(&dev->res);
385	up(&pnp_res_mutex);
386	return 0;
387	}
388
389	/**
390	* pnp_manual_config_dev - Disables Auto Config and Manually sets the resource table
391	* @dev: pointer to the desired device
392	* @res: pointer to the new resource config
393	*
394	* This function can be used by drivers that want to manually set thier resources.
395	*/
396	int pnp_manual_config_dev(struct pnp_dev dev, struct pnp_resource_table res, int mode)
397	{
398	int i;
399	struct pnp_resource_table * bak;
400	if (!dev \|\| !res)
401	return -EINVAL;
402	if (!pnp_can_configure(dev))
403	return -ENODEV;
404	bak = pnp_alloc(sizeof(struct pnp_resource_table));
405	if (!bak)
406	return -ENOMEM;
407	*bak = dev->res;
408
409	down(&pnp_res_mutex);
410	dev->res = *res;
411	if (!(mode & PNP_CONFIG_FORCE)) {
412	for (i = 0; i < PNP_MAX_PORT; i++) {
413	if(!pnp_check_port(dev,i))
414	goto fail;
415	}
416	for (i = 0; i < PNP_MAX_MEM; i++) {
417	if(!pnp_check_mem(dev,i))
418	goto fail;
419	}
420	for (i = 0; i < PNP_MAX_IRQ; i++) {
421	if(!pnp_check_irq(dev,i))
422	goto fail;
423	}
424	for (i = 0; i < PNP_MAX_DMA; i++) {
425	if(!pnp_check_dma(dev,i))
426	goto fail;
427	}
428	}
429	up(&pnp_res_mutex);
430
431	kfree(bak);
432	return 0;
433
434	fail:
435	dev->res = *bak;
436	up(&pnp_res_mutex);
437	kfree(bak);
438	return -EINVAL;
439	}
440
441	/**
442	* pnp_auto_config_dev - automatically assigns resources to a device
443	* @dev: pointer to the desired device
444	*
445	*/
446	int pnp_auto_config_dev(struct pnp_dev *dev)
447	{
448	struct pnp_option *dep;
449	int i = 1;
450
451	if(!dev)
452	return -EINVAL;
453
454	if(!pnp_can_configure(dev)) {
455	pnp_info("Device %s does not support resource configuration.", dev->dev.bus_id);
456	return -ENODEV;
457	}
458
459	if (!dev->dependent) {
460	if (pnp_assign_resources(dev, 0))
461	return 0;
462	} else {
463	dep = dev->dependent;
464	do {
465	if (pnp_assign_resources(dev, i))
466	return 0;
467	dep = dep->next;
468	i++;
469	} while (dep);
470	}
471
472	pnp_err("Unable to assign resources to device %s.", dev->dev.bus_id);
473	return -EBUSY;
474	}
475
476	/**
477	* pnp_activate_dev - activates a PnP device for use
478	* @dev: pointer to the desired device
479	*
480	* does not validate or set resources so be careful.
481	*/
482	int pnp_activate_dev(struct pnp_dev *dev)
483	{
484	if (!dev)
485	return -EINVAL;
486	if (dev->active) {
487	return 0; /* the device is already active */
488	}
489
490	/* ensure resources are allocated */
491	if (pnp_auto_config_dev(dev))
492	return -EBUSY;
493
494	if (!pnp_can_write(dev)) {
495	pnp_info("Device %s does not supported activation.", dev->dev.bus_id);
496	return -EINVAL;
497	}
498
499	if (dev->protocol->set(dev, &dev->res)<0) {
500	pnp_err("Failed to activate device %s.", dev->dev.bus_id);
501	return -EIO;
502	}
503
504	dev->active = 1;
505	pnp_info("Device %s activated.", dev->dev.bus_id);
506
507	return 1;
508	}
509
510	/**
511	* pnp_disable_dev - disables device
512	* @dev: pointer to the desired device
513	*
514	* inform the correct pnp protocol so that resources can be used by other devices
515	*/
516	int pnp_disable_dev(struct pnp_dev *dev)
517	{
518	if (!dev)
519	return -EINVAL;
520	if (!dev->active) {
521	return 0; /* the device is already disabled */
522	}
523
524	if (!pnp_can_disable(dev)) {
525	pnp_info("Device %s does not supported disabling.", dev->dev.bus_id);
526	return -EINVAL;
527	}
528	if (dev->protocol->disable(dev)<0) {
529	pnp_err("Failed to disable device %s.", dev->dev.bus_id);
530	return -EIO;
531	}
532
533	dev->active = 0;
534	pnp_info("Device %s disabled.", dev->dev.bus_id);
535
536	/* release the resources so that other devices can use them */
537	down(&pnp_res_mutex);
538	pnp_clean_resource_table(&dev->res);
539	up(&pnp_res_mutex);
540
541	return 1;
542	}
543
544	/**
545	* pnp_resource_change - change one resource
546	* @resource: pointer to resource to be changed
547	* @start: start of region
548	* @size: size of region
549	*
550	*/
551	void pnp_resource_change(struct resource *resource, unsigned long start, unsigned long size)
552	{
553	if (resource == NULL)
554	return;
555	resource->flags &= ~(IORESOURCE_AUTO \| IORESOURCE_UNSET);
556	resource->start = start;
557	resource->end = start + size - 1;
558	}
559
560
561	EXPORT_SYMBOL(pnp_manual_config_dev);
562	EXPORT_SYMBOL(pnp_auto_config_dev);
563	EXPORT_SYMBOL(pnp_activate_dev);
564	EXPORT_SYMBOL(pnp_disable_dev);
565	EXPORT_SYMBOL(pnp_resource_change);
566	EXPORT_SYMBOL(pnp_init_resource_table);