1 files changed, 542 insertions, 0 deletions
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
new file mode 100644
index 00000000000..2d1322dd7e1
--- /dev/null
+++ b/drivers/pnp/resource.c
@@ -0,0 +1,542 @@
+/*
+ * resource.c - Contains functions for registering and analyzing resource information
+ *
+ * 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/module.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+
+#include <linux/pnp.h>
+#include "base.h"
+
+static int pnp_reserve_irq[16] = { [0 ... 15] = -1 };	/* reserve (don't use) some IRQ */
+static int pnp_reserve_dma[8] = { [0 ... 7] = -1 };	/* reserve (don't use) some DMA */
+static int pnp_reserve_io[16] = { [0 ... 15] = -1 };	/* reserve (don't use) some I/O region */
+static int pnp_reserve_mem[16] = { [0 ... 15] = -1 };	/* reserve (don't use) some memory region */
+
+
+/*
+ * option registration
+ */
+
+static struct pnp_option * pnp_build_option(int priority)
+{
+	struct pnp_option *option = pnp_alloc(sizeof(struct pnp_option));
+
+	/* check if pnp_alloc ran out of memory */
+	if (!option)
+		return NULL;
+
+	option->priority = priority & 0xff;
+	/* make sure the priority is valid */
+	if (option->priority > PNP_RES_PRIORITY_FUNCTIONAL)
+		option->priority = PNP_RES_PRIORITY_INVALID;
+
+	return option;
+}
+
+struct pnp_option * pnp_register_independent_option(struct pnp_dev *dev)
+{
+	struct pnp_option *option;
+	if (!dev)
+		return NULL;
+
+	option = pnp_build_option(PNP_RES_PRIORITY_PREFERRED);
+
+	/* this should never happen but if it does we'll try to continue */
+	if (dev->independent)
+		pnp_err("independent resource already registered");
+	dev->independent = option;
+	return option;
+}
+
+struct pnp_option * pnp_register_dependent_option(struct pnp_dev *dev, int priority)
+{
+	struct pnp_option *option;
+	if (!dev)
+		return NULL;
+
+	option = pnp_build_option(priority);
+
+	if (dev->dependent) {
+		struct pnp_option *parent = dev->dependent;
+		while (parent->next)
+			parent = parent->next;
+		parent->next = option;
+	} else
+		dev->dependent = option;
+	return option;
+}
+
+int pnp_register_irq_resource(struct pnp_option *option, struct pnp_irq *data)
+{
+	struct pnp_irq *ptr;
+	if (!option)
+		return -EINVAL;
+	if (!data)
+		return -EINVAL;
+
+	ptr = option->irq;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = data;
+	else
+		option->irq = data;
+
+#ifdef CONFIG_PCI
+	{
+		int i;
+
+		for (i = 0; i < 16; i++)
+			if (test_bit(i, data->map))
+				pcibios_penalize_isa_irq(i);
+	}
+#endif
+	return 0;
+}
+
+int pnp_register_dma_resource(struct pnp_option *option, struct pnp_dma *data)
+{
+	struct pnp_dma *ptr;
+	if (!option)
+		return -EINVAL;
+	if (!data)
+		return -EINVAL;
+
+	ptr = option->dma;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = data;
+	else
+		option->dma = data;
+
+	return 0;
+}
+
+int pnp_register_port_resource(struct pnp_option *option, struct pnp_port *data)
+{
+	struct pnp_port *ptr;
+	if (!option)
+		return -EINVAL;
+	if (!data)
+		return -EINVAL;
+
+	ptr = option->port;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = data;
+	else
+		option->port = data;
+
+	return 0;
+}
+
+int pnp_register_mem_resource(struct pnp_option *option, struct pnp_mem *data)
+{
+	struct pnp_mem *ptr;
+	if (!option)
+		return -EINVAL;
+	if (!data)
+		return -EINVAL;
+
+	ptr = option->mem;
+	while (ptr && ptr->next)
+		ptr = ptr->next;
+	if (ptr)
+		ptr->next = data;
+	else
+		option->mem = data;
+	return 0;
+}
+
+static void pnp_free_port(struct pnp_port *port)
+{
+	struct pnp_port *next;
+
+	while (port) {
+		next = port->next;
+		kfree(port);
+		port = next;
+	}
+}
+
+static void pnp_free_irq(struct pnp_irq *irq)
+{
+	struct pnp_irq *next;
+
+	while (irq) {
+		next = irq->next;
+		kfree(irq);
+		irq = next;
+	}
+}
+
+static void pnp_free_dma(struct pnp_dma *dma)
+{
+	struct pnp_dma *next;
+
+	while (dma) {
+		next = dma->next;
+		kfree(dma);
+		dma = next;
+	}
+}
+
+static void pnp_free_mem(struct pnp_mem *mem)
+{
+	struct pnp_mem *next;
+
+	while (mem) {
+		next = mem->next;
+		kfree(mem);
+		mem = next;
+	}
+}
+
+void pnp_free_option(struct pnp_option *option)
+{
+	struct pnp_option *next;
+
+	while (option) {
+		next = option->next;
+		pnp_free_port(option->port);
+		pnp_free_irq(option->irq);
+		pnp_free_dma(option->dma);
+		pnp_free_mem(option->mem);
+		kfree(option);
+		option = next;
+	}
+}
+
+
+/*
+ * resource validity checking
+ */
+
+#define length(start, end) (*(end) - *(start) + 1)
+
+/* Two ranges conflict if one doesn't end before the other starts */
+#define ranged_conflict(starta, enda, startb, endb) \
+	!((*(enda) < *(startb)) || (*(endb) < *(starta)))
+
+#define cannot_compare(flags) \
+((flags) & (IORESOURCE_UNSET | IORESOURCE_DISABLED))
+
+int pnp_check_port(struct pnp_dev * dev, int idx)
+{
+	int tmp;
+	struct pnp_dev *tdev;
+	unsigned long *port, *end, *tport, *tend;
+	port = &dev->res.port_resource[idx].start;
+	end = &dev->res.port_resource[idx].end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(dev->res.port_resource[idx].flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if(!dev->active) {
+		if (__check_region(&ioport_resource, *port, length(port,end)))
+			return 0;
+	}
+
+	/* check if the resource is reserved */
+	for (tmp = 0; tmp < 8; tmp++) {
+		int rport = pnp_reserve_io[tmp << 1];
+		int rend = pnp_reserve_io[(tmp << 1) + 1] + rport - 1;
+		if (ranged_conflict(port,end,&rport,&rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (tmp = 0; tmp < PNP_MAX_PORT && tmp != idx; tmp++) {
+		if (dev->res.port_resource[tmp].flags & IORESOURCE_IO) {
+			tport = &dev->res.port_resource[tmp].start;
+			tend = &dev->res.port_resource[tmp].end;
+			if (ranged_conflict(port,end,tport,tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
+			if (tdev->res.port_resource[tmp].flags & IORESOURCE_IO) {
+				if (cannot_compare(tdev->res.port_resource[tmp].flags))
+					continue;
+				tport = &tdev->res.port_resource[tmp].start;
+				tend = &tdev->res.port_resource[tmp].end;
+				if (ranged_conflict(port,end,tport,tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+int pnp_check_mem(struct pnp_dev * dev, int idx)
+{
+	int tmp;
+	struct pnp_dev *tdev;
+	unsigned long *addr, *end, *taddr, *tend;
+	addr = &dev->res.mem_resource[idx].start;
+	end = &dev->res.mem_resource[idx].end;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(dev->res.mem_resource[idx].flags))
+		return 1;
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if(!dev->active) {
+		if (check_mem_region(*addr, length(addr,end)))
+			return 0;
+	}
+
+	/* check if the resource is reserved */
+	for (tmp = 0; tmp < 8; tmp++) {
+		int raddr = pnp_reserve_mem[tmp << 1];
+		int rend = pnp_reserve_mem[(tmp << 1) + 1] + raddr - 1;
+		if (ranged_conflict(addr,end,&raddr,&rend))
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (tmp = 0; tmp < PNP_MAX_MEM && tmp != idx; tmp++) {
+		if (dev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
+			taddr = &dev->res.mem_resource[tmp].start;
+			tend = &dev->res.mem_resource[tmp].end;
+			if (ranged_conflict(addr,end,taddr,tend))
+				return 0;
+		}
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
+			if (tdev->res.mem_resource[tmp].flags & IORESOURCE_MEM) {
+				if (cannot_compare(tdev->res.mem_resource[tmp].flags))
+					continue;
+				taddr = &tdev->res.mem_resource[tmp].start;
+				tend = &tdev->res.mem_resource[tmp].end;
+				if (ranged_conflict(addr,end,taddr,tend))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+static irqreturn_t pnp_test_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+	return IRQ_HANDLED;
+}
+
+int pnp_check_irq(struct pnp_dev * dev, int idx)
+{
+	int tmp;
+	struct pnp_dev *tdev;
+	unsigned long * irq = &dev->res.irq_resource[idx].start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(dev->res.irq_resource[idx].flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*irq < 0 || *irq > 15)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (tmp = 0; tmp < 16; tmp++) {
+		if (pnp_reserve_irq[tmp] == *irq)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (tmp = 0; tmp < PNP_MAX_IRQ && tmp != idx; tmp++) {
+		if (dev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
+			if (dev->res.irq_resource[tmp].start == *irq)
+				return 0;
+		}
+	}
+
+#ifdef CONFIG_PCI
+	/* check if the resource is being used by a pci device */
+	{
+		struct pci_dev *pci = NULL;
+		for_each_pci_dev(pci) {
+			if (pci->irq == *irq)
+				return 0;
+		}
+	}
+#endif
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if(!dev->active) {
+		if (request_irq(*irq, pnp_test_handler, SA_INTERRUPT, "pnp", NULL))
+			return 0;
+		free_irq(*irq, NULL);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
+			if (tdev->res.irq_resource[tmp].flags & IORESOURCE_IRQ) {
+				if (cannot_compare(tdev->res.irq_resource[tmp].flags))
+					continue;
+				if ((tdev->res.irq_resource[tmp].start == *irq))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+}
+
+int pnp_check_dma(struct pnp_dev * dev, int idx)
+{
+#ifndef CONFIG_IA64
+	int tmp;
+	struct pnp_dev *tdev;
+	unsigned long * dma = &dev->res.dma_resource[idx].start;
+
+	/* if the resource doesn't exist, don't complain about it */
+	if (cannot_compare(dev->res.dma_resource[idx].flags))
+		return 1;
+
+	/* check if the resource is valid */
+	if (*dma < 0 || *dma == 4 || *dma > 7)
+		return 0;
+
+	/* check if the resource is reserved */
+	for (tmp = 0; tmp < 8; tmp++) {
+		if (pnp_reserve_dma[tmp] == *dma)
+			return 0;
+	}
+
+	/* check for internal conflicts */
+	for (tmp = 0; tmp < PNP_MAX_DMA && tmp != idx; tmp++) {
+		if (dev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
+			if (dev->res.dma_resource[tmp].start == *dma)
+				return 0;
+		}
+	}
+
+	/* check if the resource is already in use, skip if the
+	 * device is active because it itself may be in use */
+	if(!dev->active) {
+		if (request_dma(*dma, "pnp"))
+			return 0;
+		free_dma(*dma);
+	}
+
+	/* check for conflicts with other pnp devices */
+	pnp_for_each_dev(tdev) {
+		if (tdev == dev)
+			continue;
+		for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
+			if (tdev->res.dma_resource[tmp].flags & IORESOURCE_DMA) {
+				if (cannot_compare(tdev->res.dma_resource[tmp].flags))
+					continue;
+				if ((tdev->res.dma_resource[tmp].start == *dma))
+					return 0;
+			}
+		}
+	}
+
+	return 1;
+#else
+	/* IA64 hasn't legacy DMA */
+	return 0;
+#endif
+}
+
+
+EXPORT_SYMBOL(pnp_register_dependent_option);
+EXPORT_SYMBOL(pnp_register_independent_option);
+EXPORT_SYMBOL(pnp_register_irq_resource);
+EXPORT_SYMBOL(pnp_register_dma_resource);
+EXPORT_SYMBOL(pnp_register_port_resource);
+EXPORT_SYMBOL(pnp_register_mem_resource);
+
+
+/* format is: pnp_reserve_irq=irq1[,irq2] .... */
+
+static int __init pnp_setup_reserve_irq(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str,&pnp_reserve_irq[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
+
+/* format is: pnp_reserve_dma=dma1[,dma2] .... */
+
+static int __init pnp_setup_reserve_dma(char *str)
+{
+	int i;
+
+	for (i = 0; i < 8; i++)
+		if (get_option(&str,&pnp_reserve_dma[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
+
+/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
+
+static int __init pnp_setup_reserve_io(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str,&pnp_reserve_io[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_io=", pnp_setup_reserve_io);
+
+/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
+
+static int __init pnp_setup_reserve_mem(char *str)
+{
+	int i;
+
+	for (i = 0; i < 16; i++)
+		if (get_option(&str,&pnp_reserve_mem[i]) != 2)
+			break;
+	return 1;
+}
+
+__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);