Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 566 insertions, 0 deletions

diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
new file mode 100644
index 00000000000..639e0425348
--- /dev/null
+++ b/drivers/pnp/manager.c
@@ -0,0 +1,566 @@
+/*
+ * 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);