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 000000000000..639e04253482
--- /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);