1 files changed, 111 insertions, 58 deletions

diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 0e7aa8176692..62fd705203fb 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -527,64 +527,29 @@ static int yenta_sock_suspend(struct pcmcia_socket *sock)
  * Use an adaptive allocation for the memory resource,
  * sometimes the memory behind pci bridges is limited:
  * 1/8 of the size of the io window of the parent.
- * max 4 MB, min 16 kB.
+ * max 4 MB, min 16 kB. We try very hard to not get below
+ * the "ACC" values, though.
  */
 #define BRIDGE_MEM_MAX 4*1024*1024
+#define BRIDGE_MEM_ACC 128*1024
 #define BRIDGE_MEM_MIN 16*1024
 
-#define BRIDGE_IO_MAX 256
+#define BRIDGE_IO_MAX 512
+#define BRIDGE_IO_ACC 256
 #define BRIDGE_IO_MIN 32
 
 #ifndef PCIBIOS_MIN_CARDBUS_IO
 #define PCIBIOS_MIN_CARDBUS_IO PCIBIOS_MIN_IO
 #endif
 
-static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type)
+static int yenta_search_one_res(struct resource *root, struct resource *res,
+				u32 min)
 {
-	struct pci_bus *bus;
-	struct resource *root, *res;
-	u32 start, end;
-	u32 align, size, min;
-	unsigned offset;
-	unsigned mask;
-
-	res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
-	/* Already allocated? */
-	if (res->parent)
-		return 0;
-
-	/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
-	mask = ~0xfff;
-	if (type & IORESOURCE_IO)
-		mask = ~3;
-
-	offset = 0x1c + 8*nr;
-	bus = socket->dev->subordinate;
-	res->name = bus->name;
-	res->flags = type;
-	res->start = 0;
-	res->end = 0;
-	root = pci_find_parent_resource(socket->dev, res);
+	u32 align, size, start, end;
 
-	if (!root)
-		return;
-
-	start = config_readl(socket, offset) & mask;
-	end = config_readl(socket, offset+4) | ~mask;
-	if (start && end > start && !override_bios) {
-		res->start = start;
-		res->end = end;
-		if (request_resource(root, res) == 0)
-			return;
-		printk(KERN_INFO "yenta %s: Preassigned resource %d busy, reconfiguring...\n",
-				pci_name(socket->dev), nr);
-		res->start = res->end = 0;
-	}
-
-	if (type & IORESOURCE_IO) {
+	if (res->flags & IORESOURCE_IO) {
 		align = 1024;
 		size = BRIDGE_IO_MAX;
-		min = BRIDGE_IO_MIN;
 		start = PCIBIOS_MIN_CARDBUS_IO;
 		end = ~0U;
 	} else {
@@ -599,26 +564,107 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
 				i++;
 			size = 1 << i;
 		}
-		if (size < BRIDGE_MEM_MIN)
-			size = BRIDGE_MEM_MIN;
-		min = BRIDGE_MEM_MIN;
+		if (size < min)
+			size = min;
 		align = size;
 		start = PCIBIOS_MIN_MEM;
 		end = ~0U;
 	}
-	
+
 	do {
-		if (allocate_resource(root, res, size, start, end, align, NULL, NULL)==0) {
-			config_writel(socket, offset, res->start);
-			config_writel(socket, offset+4, res->end);
-			return;
+		if (allocate_resource(root, res, size, start, end, align,
+				      NULL, NULL)==0) {
+			return 1;
 		}
 		size = size/2;
 		align = size;
 	} while (size >= min);
+
+	return 0;
+}
+
+
+static int yenta_search_res(struct yenta_socket *socket, struct resource *res,
+			    u32 min)
+{
+	int i;
+	for (i=0; i<PCI_BUS_NUM_RESOURCES; i++) {
+		struct resource * root = socket->dev->bus->resource[i];
+		if (!root)
+			continue;
+
+		if ((res->flags ^ root->flags) &
+		    (IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH))
+			continue; /* Wrong type */
+
+		if (yenta_search_one_res(root, res, min))
+			return 1;
+	}
+	return 0;
+}
+
+static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type, int addr_start, int addr_end)
+{
+	struct resource *root, *res;
+	struct pci_bus_region region;
+	unsigned mask;
+
+	res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
+	/* Already allocated? */
+	if (res->parent)
+		return;
+
+	/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
+	mask = ~0xfff;
+	if (type & IORESOURCE_IO)
+		mask = ~3;
+
+	res->name = socket->dev->subordinate->name;
+	res->flags = type;
+
+	region.start = config_readl(socket, addr_start) & mask;
+	region.end = config_readl(socket, addr_end) | ~mask;
+	if (region.start && region.end > region.start && !override_bios) {
+		pcibios_bus_to_resource(socket->dev, res, &region);
+		root = pci_find_parent_resource(socket->dev, res);
+		if (root && (request_resource(root, res) == 0))
+			return;
+		printk(KERN_INFO "yenta %s: Preassigned resource %d busy or not available, reconfiguring...\n",
+				pci_name(socket->dev), nr);
+	}
+
+	if (type & IORESOURCE_IO) {
+		if ((yenta_search_res(socket, res, BRIDGE_IO_MAX)) ||
+		    (yenta_search_res(socket, res, BRIDGE_IO_ACC)) ||
+		    (yenta_search_res(socket, res, BRIDGE_IO_MIN))) {
+			config_writel(socket, addr_start, res->start);
+			config_writel(socket, addr_end, res->end);
+			return;
+		}
+	} else {
+		if (type & IORESOURCE_PREFETCH) {
+			if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
+			    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
+			    (yenta_search_res(socket, res, BRIDGE_MEM_MIN))) {
+				config_writel(socket, addr_start, res->start);
+				config_writel(socket, addr_end, res->end);
+				return;
+			}
+			/* Approximating prefetchable by non-prefetchable */
+			res->flags = IORESOURCE_MEM;
+		}
+		if ((yenta_search_res(socket, res, BRIDGE_MEM_MAX)) ||
+		    (yenta_search_res(socket, res, BRIDGE_MEM_ACC)) ||
+		    (yenta_search_res(socket, res, BRIDGE_MEM_MIN))) {
+			config_writel(socket, addr_start, res->start);
+			config_writel(socket, addr_end, res->end);
+			return;
+		}
+	}
+
 	printk(KERN_INFO "yenta %s: no resource of type %x available, trying to continue...\n",
-			pci_name(socket->dev), type);
-	res->start = res->end = 0;
+	       pci_name(socket->dev), type);
+	res->start = res->end = res->flags = 0;
 }
 
 /*
@@ -626,10 +672,14 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
  */
 static void yenta_allocate_resources(struct yenta_socket *socket)
 {
-	yenta_allocate_res(socket, 0, IORESOURCE_MEM|IORESOURCE_PREFETCH);
-	yenta_allocate_res(socket, 1, IORESOURCE_MEM);
-	yenta_allocate_res(socket, 2, IORESOURCE_IO);
-	yenta_allocate_res(socket, 3, IORESOURCE_IO);	/* PCI isn't clever enough to use this one yet */
+	yenta_allocate_res(socket, 0, IORESOURCE_IO,
+			   PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
+	yenta_allocate_res(socket, 1, IORESOURCE_IO,
+			   PCI_CB_IO_BASE_1, PCI_CB_IO_LIMIT_1);
+	yenta_allocate_res(socket, 2, IORESOURCE_MEM|IORESOURCE_PREFETCH,
+			   PCI_CB_MEMORY_BASE_0, PCI_CB_MEMORY_LIMIT_0);
+	yenta_allocate_res(socket, 3, IORESOURCE_MEM,
+			   PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
 }
 
 
@@ -1055,6 +1105,7 @@ static int yenta_dev_suspend (struct pci_dev *dev, pm_message_t state)
 		pci_save_state(dev);
 		pci_read_config_dword(dev, 16*4, &socket->saved_state[0]);
 		pci_read_config_dword(dev, 17*4, &socket->saved_state[1]);
+		pci_disable_device(dev);
 
 		/*
 		 * Some laptops (IBM T22) do not like us putting the Cardbus
@@ -1078,6 +1129,8 @@ static int yenta_dev_resume (struct pci_dev *dev)
 		pci_restore_state(dev);
 		pci_write_config_dword(dev, 16*4, socket->saved_state[0]);
 		pci_write_config_dword(dev, 17*4, socket->saved_state[1]);
+		pci_enable_device(dev);
+		pci_set_master(dev);
 
 		if (socket->type && socket->type->restore_state)
 			socket->type->restore_state(socket);