X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fpci%2Fhotplug%2Fcpci_hotplug_pci.c;h=225b5e551dd6f53133b982087624b541310bc0ee;hb=9464c7cf61b9433057924c36e6e02f303a00e768;hp=3aead25d774ea8ddfd2bea5b20a361bad9d4dc04;hpb=daddc0d38b3571bed170afa273a49a0eba090c1e;p=linux-2.6.git

diff --git a/drivers/pci/hotplug/cpci_hotplug_pci.c b/drivers/pci/hotplug/cpci_hotplug_pci.c
index 3aead25d7..225b5e551 100644
--- a/drivers/pci/hotplug/cpci_hotplug_pci.c
+++ b/drivers/pci/hotplug/cpci_hotplug_pci.c
@@ -1,7 +1,7 @@
 /*
  * CompactPCI Hot Plug Driver PCI functions
  *
- * Copyright (C) 2002 by SOMA Networks, Inc.
+ * Copyright (C) 2002,2005 by SOMA Networks, Inc.
  *
  * All rights reserved.
  *
@@ -32,20 +32,16 @@
 #include "pci_hotplug.h"
 #include "cpci_hotplug.h"
 
-#if !defined(CONFIG_HOTPLUG_CPCI_MODULE)
 #define MY_NAME	"cpci_hotplug"
-#else
-#define MY_NAME	THIS_MODULE->name
-#endif
 
 extern int cpci_debug;
 
 #define dbg(format, arg...)					\
 	do {							\
-		if(cpci_debug)					\
+		if (cpci_debug)					\
 			printk (KERN_DEBUG "%s: " format "\n",	\
 				MY_NAME , ## arg); 		\
-	} while(0)
+	} while (0)
 #define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
 #define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
 #define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
@@ -61,16 +57,15 @@ u8 cpci_get_attention_status(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return 0;
-	}
 
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return 0;
-	}
+
 	return hs_csr & 0x0008 ? 1 : 0;
 }
 
@@ -82,27 +77,22 @@ int cpci_set_attention_status(struct slot* slot, int status)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return 0;
-	}
-
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return 0;
-	}
-	if(status) {
+	if (status)
 		hs_csr |= HS_CSR_LOO;
-	} else {
+	else
 		hs_csr &= ~HS_CSR_LOO;
-	}
-	if(pci_bus_write_config_word(slot->bus,
+	if (pci_bus_write_config_word(slot->bus,
 				      slot->devfn,
 				      hs_cap + 2,
-				      hs_csr)) {
+				      hs_csr))
 		return 0;
-	}
 	return 1;
 }
 
@@ -114,49 +104,16 @@ u16 cpci_get_hs_csr(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return 0xFFFF;
-	}
-
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return 0xFFFF;
-	}
 	return hs_csr;
 }
 
-u16 cpci_set_hs_csr(struct slot* slot, u16 hs_csr)
-{
-	int hs_cap;
-	u16 new_hs_csr;
-
-	hs_cap = pci_bus_find_capability(slot->bus,
-					 slot->devfn,
-					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
-		return 0xFFFF;
-	}
-
-	/* Write out the new value */
-	if(pci_bus_write_config_word(slot->bus,
-				      slot->devfn,
-				      hs_cap + 2,
-				      hs_csr)) {
-		return 0xFFFF;
-	}
-
-	/* Read back what we just wrote out */
-	if(pci_bus_read_config_word(slot->bus,
-				     slot->devfn,
-				     hs_cap + 2,
-				     &new_hs_csr)) {
-		return 0xFFFF;
-	}
-	return new_hs_csr;
-}
-
 int cpci_check_and_clear_ins(struct slot* slot)
 {
 	int hs_cap;
@@ -166,24 +123,22 @@ int cpci_check_and_clear_ins(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return 0;
-	}
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return 0;
-	}
-	if(hs_csr & HS_CSR_INS) {
+	if (hs_csr & HS_CSR_INS) {
 		/* Clear INS (by setting it) */
-		if(pci_bus_write_config_word(slot->bus,
+		if (pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
 					      hs_cap + 2,
-					      hs_csr)) {
+					      hs_csr))
 			ins = 0;
-		}
-		ins = 1;
+		else
+			ins = 1;
 	}
 	return ins;
 }
@@ -197,18 +152,15 @@ int cpci_check_ext(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return 0;
-	}
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return 0;
-	}
-	if(hs_csr & HS_CSR_EXT) {
+	if (hs_csr & HS_CSR_EXT)
 		ext = 1;
-	}
 	return ext;
 }
 
@@ -220,23 +172,20 @@ int cpci_clear_ext(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return -ENODEV;
-	}
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return -ENODEV;
-	}
-	if(hs_csr & HS_CSR_EXT) {
+	if (hs_csr & HS_CSR_EXT) {
 		/* Clear EXT (by setting it) */
-		if(pci_bus_write_config_word(slot->bus,
+		if (pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
 					      hs_cap + 2,
-					      hs_csr)) {
+					      hs_csr))
 			return -ENODEV;
-		}
 	}
 	return 0;
 }
@@ -249,19 +198,16 @@ int cpci_led_on(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return -ENODEV;
-	}
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return -ENODEV;
-	}
-	if((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
-		/* Set LOO */
+	if ((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
 		hs_csr |= HS_CSR_LOO;
-		if(pci_bus_write_config_word(slot->bus,
+		if (pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
 					      hs_cap + 2,
 					      hs_csr)) {
@@ -281,19 +227,16 @@ int cpci_led_off(struct slot* slot)
 	hs_cap = pci_bus_find_capability(slot->bus,
 					 slot->devfn,
 					 PCI_CAP_ID_CHSWP);
-	if(!hs_cap) {
+	if (!hs_cap)
 		return -ENODEV;
-	}
-	if(pci_bus_read_config_word(slot->bus,
+	if (pci_bus_read_config_word(slot->bus,
 				     slot->devfn,
 				     hs_cap + 2,
-				     &hs_csr)) {
+				     &hs_csr))
 		return -ENODEV;
-	}
-	if(hs_csr & HS_CSR_LOO) {
-		/* Clear LOO */
+	if (hs_csr & HS_CSR_LOO) {
 		hs_csr &= ~HS_CSR_LOO;
-		if(pci_bus_write_config_word(slot->bus,
+		if (pci_bus_write_config_word(slot->bus,
 					      slot->devfn,
 					      hs_cap + 2,
 					      hs_csr)) {
@@ -310,268 +253,21 @@ int cpci_led_off(struct slot* slot)
  * Device configuration functions
  */
 
-static int cpci_configure_dev(struct pci_bus *bus, struct pci_dev *dev)
-{
-	u8 irq_pin;
-	int r;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/* NOTE: device already setup from prior scan */
-
-	/* FIXME: How would we know if we need to enable the expansion ROM? */
-	pci_write_config_word(dev, PCI_ROM_ADDRESS, 0x00L);
-
-	/* Assign resources */
-	dbg("assigning resources for %02x:%02x.%x",
-	    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-	for (r = 0; r < 6; r++) {
-		struct resource *res = dev->resource + r;
-		if(res->flags)
-			pci_assign_resource(dev, r);
-	}
-	dbg("finished assigning resources for %02x:%02x.%x",
-	    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-
-	/* Does this function have an interrupt at all? */
-	dbg("checking for function interrupt");
-	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq_pin);
-	if(irq_pin) {
-		dbg("function uses interrupt pin %d", irq_pin);
-	}
-
-	/*
-	 * Need to explicitly set irq field to 0 so that it'll get assigned
-	 * by the pcibios platform dependent code called by pci_enable_device.
-	 */
-	dev->irq = 0;
-
-	dbg("enabling device");
-	pci_enable_device(dev);	/* XXX check return */
-	dbg("now dev->irq = %d", dev->irq);
-	if(irq_pin && dev->irq) {
-		pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
-	}
-
-	/* Can't use pci_insert_device at the moment, do it manually for now */
-	pci_proc_attach_device(dev);
-	dbg("notifying drivers");
-	//pci_announce_device_to_drivers(dev);
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int cpci_configure_bridge(struct pci_bus* bus, struct pci_dev* dev)
-{
-	int rc;
-	struct pci_bus* child;
-	struct resource* r;
-	u8 max, n;
-	u16 command;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/* Do basic bridge initialization */
-	rc = pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0x40);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_LATENCY_TIMER failed\n", __FUNCTION__);
-	}
-	rc = pci_write_config_byte(dev, PCI_SEC_LATENCY_TIMER, 0x40);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_SEC_LATENCY_TIMER failed\n", __FUNCTION__);
-	}
-	rc = pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, L1_CACHE_BYTES / 4);
-	if(rc) {
-		printk(KERN_ERR "%s - write of PCI_CACHE_LINE_SIZE failed\n", __FUNCTION__);
-	}
-
-	/*
-	 * Set parent bridge's subordinate field so that configuration space
-	 * access will work in pci_scan_bridge and friends.
-	 */
-	max = pci_max_busnr();
-	bus->subordinate = max + 1;
-	pci_write_config_byte(bus->self, PCI_SUBORDINATE_BUS, max + 1);
-
-	/* Scan behind bridge */
-	n = pci_scan_bridge(bus, dev, max, 2);
-	child = pci_find_bus(0, max + 1);
-	if (!child)
-		return -ENODEV;
-	pci_proc_attach_bus(child);
-
-	/*
-	 * Update parent bridge's subordinate field if there were more bridges
-	 * behind the bridge that was scanned.
-	 */
-	if(n > max) {
-		bus->subordinate = n;
-		pci_write_config_byte(bus->self, PCI_SUBORDINATE_BUS, n);
-	}
-
-	/*
-	 * Update the bridge resources of the bridge to accommodate devices
-	 * behind it.
-	 */
-	pci_bus_size_bridges(child);
-	pci_bus_assign_resources(child);
-
-	/* Enable resource mapping via command register */
-	command = PCI_COMMAND_MASTER | PCI_COMMAND_INVALIDATE | PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
-	r = child->resource[0];
-	if(r && r->start) {
-		command |= PCI_COMMAND_IO;
-	}
-	r = child->resource[1];
-	if(r && r->start) {
-		command |= PCI_COMMAND_MEMORY;
-	}
-	r = child->resource[2];
-	if(r && r->start) {
-		command |= PCI_COMMAND_MEMORY;
-	}
-	rc = pci_write_config_word(dev, PCI_COMMAND, command);
-	if(rc) {
-		err("Error setting command register");
-		return rc;
-	}
-
-	/* Set bridge control register */
-	command = PCI_BRIDGE_CTL_PARITY | PCI_BRIDGE_CTL_SERR | PCI_BRIDGE_CTL_NO_ISA;
-	rc = pci_write_config_word(dev, PCI_BRIDGE_CONTROL, command);
-	if(rc) {
-		err("Error setting bridge control register");
-		return rc;
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int configure_visit_pci_dev(struct pci_dev_wrapped *wrapped_dev,
-				   struct pci_bus_wrapped *wrapped_bus)
-{
-	int rc;
-	struct pci_dev *dev = wrapped_dev->dev;
-	struct pci_bus *bus = wrapped_bus->bus;
-	struct slot* slot;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/*
-	 * We need to fix up the hotplug representation with the Linux
-	 * representation.
-	 */
-	if(wrapped_dev->data) {
-		slot = (struct slot*) wrapped_dev->data;
-		slot->dev = dev;
-	}
-
-	/* If it's a bridge, scan behind it for devices */
-	if(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
-		rc = cpci_configure_bridge(bus, dev);
-		if(rc)
-			return rc;
-	}
-
-	/* Actually configure device */
-	if(dev) {
-		rc = cpci_configure_dev(bus, dev);
-		if(rc)
-			return rc;
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int unconfigure_visit_pci_dev_phase2(struct pci_dev_wrapped *wrapped_dev,
-					    struct pci_bus_wrapped *wrapped_bus)
-{
-	struct pci_dev *dev = wrapped_dev->dev;
-	struct slot* slot;
-
-	dbg("%s - enter", __FUNCTION__);
-	if(!dev)
-		return -ENODEV;
-
-	/* Remove the Linux representation */
-	if(pci_remove_device_safe(dev)) {
-		err("Could not remove device\n");
-		return -1;
-	}
-
-	/*
-	 * Now remove the hotplug representation.
-	 */
-	if(wrapped_dev->data) {
-		slot = (struct slot*) wrapped_dev->data;
-		slot->dev = NULL;
-	} else {
-		dbg("No hotplug representation for %02x:%02x.%x",
-		    dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static int unconfigure_visit_pci_bus_phase2(struct pci_bus_wrapped *wrapped_bus,
-					    struct pci_dev_wrapped *wrapped_dev)
-{
-	struct pci_bus *bus = wrapped_bus->bus;
-	struct pci_bus *parent = bus->self->bus;
-
-	dbg("%s - enter", __FUNCTION__);
-
-	/* The cleanup code for proc entries regarding buses should be in the kernel... */
-	if(bus->procdir)
-		dbg("detach_pci_bus %s", bus->procdir->name);
-	pci_proc_detach_bus(bus);
-
-	/* The cleanup code should live in the kernel... */
-	bus->self->subordinate = NULL;
-
-	/* unlink from parent bus */
-	list_del(&bus->node);
-
-	/* Now, remove */
-	if(bus)
-		kfree(bus);
-
-	/* Update parent's subordinate field */
-	if(parent) {
-		u8 n = pci_bus_max_busnr(parent);
-		if(n < parent->subordinate) {
-			parent->subordinate = n;
-			pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, n);
-		}
-	}
-	dbg("%s - exit", __FUNCTION__);
-	return 0;
-}
-
-static struct pci_visit configure_functions = {
-	.visit_pci_dev = configure_visit_pci_dev,
-};
-
-static struct pci_visit unconfigure_functions_phase2 = {
-	.post_visit_pci_bus = unconfigure_visit_pci_bus_phase2,
-	.post_visit_pci_dev = unconfigure_visit_pci_dev_phase2
-};
-
-
 int cpci_configure_slot(struct slot* slot)
 {
-	int rc = 0;
+	unsigned char busnr;
+	struct pci_bus *child;
 
 	dbg("%s - enter", __FUNCTION__);
 
-	if(slot->dev == NULL) {
+	if (slot->dev == NULL) {
 		dbg("pci_dev null, finding %02x:%02x:%x",
 		    slot->bus->number, PCI_SLOT(slot->devfn), PCI_FUNC(slot->devfn));
-		slot->dev = pci_find_slot(slot->bus->number, slot->devfn);
+		slot->dev = pci_get_slot(slot->bus, slot->devfn);
 	}
 
 	/* Still NULL? Well then scan for it! */
-	if(slot->dev == NULL) {
+	if (slot->dev == NULL) {
 		int n;
 		dbg("pci_dev still null");
 
@@ -581,79 +277,50 @@ int cpci_configure_slot(struct slot* slot)
 		 */
 		n = pci_scan_slot(slot->bus, slot->devfn);
 		dbg("%s: pci_scan_slot returned %d", __FUNCTION__, n);
-		if(n > 0)
+		if (n > 0)
 			pci_bus_add_devices(slot->bus);
-		slot->dev = pci_find_slot(slot->bus->number, slot->devfn);
-		if(slot->dev == NULL) {
+		slot->dev = pci_get_slot(slot->bus, slot->devfn);
+		if (slot->dev == NULL) {
 			err("Could not find PCI device for slot %02x", slot->number);
-			return 0;
+			return 1;
 		}
 	}
-	dbg("slot->dev = %p", slot->dev);
-	if(slot->dev) {
-		struct pci_dev *dev;
-		struct pci_dev_wrapped wrapped_dev;
-		struct pci_bus_wrapped wrapped_bus;
-		int i;
-
-		memset(&wrapped_dev, 0, sizeof (struct pci_dev_wrapped));
-		memset(&wrapped_bus, 0, sizeof (struct pci_bus_wrapped));
-
-		for (i = 0; i < 8; i++) {
-			dev = pci_find_slot(slot->bus->number,
-					    PCI_DEVFN(PCI_SLOT(slot->dev->devfn), i));
-			if(!dev)
-				continue;
-			wrapped_dev.dev = dev;
-			wrapped_bus.bus = slot->dev->bus;
-			if(i)
-				wrapped_dev.data = NULL;
-			else
-				wrapped_dev.data = (void*) slot;
-			rc = pci_visit_dev(&configure_functions, &wrapped_dev, &wrapped_bus);
-		}
+
+	if (slot->dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+		pci_read_config_byte(slot->dev, PCI_SECONDARY_BUS, &busnr);
+		child = pci_add_new_bus(slot->dev->bus, slot->dev, busnr);
+		pci_do_scan_bus(child);
+		pci_bus_size_bridges(child);
 	}
 
-	dbg("%s - exit, rc = %d", __FUNCTION__, rc);
-	return rc;
+	pci_bus_assign_resources(slot->dev->bus);
+
+	dbg("%s - exit", __FUNCTION__);
+	return 0;
 }
 
 int cpci_unconfigure_slot(struct slot* slot)
 {
-	int rc = 0;
 	int i;
-	struct pci_dev_wrapped wrapped_dev;
-	struct pci_bus_wrapped wrapped_bus;
 	struct pci_dev *dev;
 
 	dbg("%s - enter", __FUNCTION__);
-
-	if(!slot->dev) {
+	if (!slot->dev) {
 		err("No device for slot %02x\n", slot->number);
 		return -ENODEV;
 	}
 
-	memset(&wrapped_dev, 0, sizeof (struct pci_dev_wrapped));
-	memset(&wrapped_bus, 0, sizeof (struct pci_bus_wrapped));
-
 	for (i = 0; i < 8; i++) {
-		dev = pci_find_slot(slot->bus->number,
+		dev = pci_get_slot(slot->bus,
 				    PCI_DEVFN(PCI_SLOT(slot->devfn), i));
-		if(dev) {
-			wrapped_dev.dev = dev;
-			wrapped_bus.bus = dev->bus;
- 			if(i)
- 				wrapped_dev.data = NULL;
- 			else
- 				wrapped_dev.data = (void*) slot;
-			dbg("%s - unconfigure phase 2", __FUNCTION__);
-			rc = pci_visit_dev(&unconfigure_functions_phase2,
-					   &wrapped_dev,
-					   &wrapped_bus);
-			if(rc)
-				break;
+		if (dev) {
+			pci_remove_bus_device(dev);
+			pci_dev_put(dev);
 		}
 	}
-	dbg("%s - exit, rc = %d", __FUNCTION__, rc);
-	return rc;
+	pci_dev_put(slot->dev);
+	slot->dev = NULL;
+
+	dbg("%s - exit", __FUNCTION__);
+	return 0;
 }