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path: root/drivers/pcmcia/yenta_socket.c
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Diffstat (limited to 'drivers/pcmcia/yenta_socket.c')
-rw-r--r--drivers/pcmcia/yenta_socket.c47
1 files changed, 24 insertions, 23 deletions
diff --git a/drivers/pcmcia/yenta_socket.c b/drivers/pcmcia/yenta_socket.c
index 0347a29f297..f0997c36c9b 100644
--- a/drivers/pcmcia/yenta_socket.c
+++ b/drivers/pcmcia/yenta_socket.c
@@ -72,6 +72,7 @@ static inline void cb_writel(struct yenta_socket *socket, unsigned reg, u32 val)
{
debug("%p %04x %08x\n", socket, reg, val);
writel(val, socket->base + reg);
+ readl(socket->base + reg); /* avoid problems with PCI write posting */
}
static inline u8 config_readb(struct yenta_socket *socket, unsigned offset)
@@ -136,6 +137,7 @@ static inline void exca_writeb(struct yenta_socket *socket, unsigned reg, u8 val
{
debug("%p %04x %02x\n", socket, reg, val);
writeb(val, socket->base + 0x800 + reg);
+ readb(socket->base + 0x800 + reg); /* PCI write posting... */
}
static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val)
@@ -143,6 +145,10 @@ static void exca_writew(struct yenta_socket *socket, unsigned reg, u16 val)
debug("%p %04x %04x\n", socket, reg, val);
writeb(val, socket->base + 0x800 + reg);
writeb(val >> 8, socket->base + 0x800 + reg + 1);
+
+ /* PCI write posting... */
+ readb(socket->base + 0x800 + reg);
+ readb(socket->base + 0x800 + reg + 1);
}
/*
@@ -667,7 +673,7 @@ static int yenta_search_res(struct yenta_socket *socket, struct resource *res,
return 0;
}
-static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned type, int addr_start, int addr_end)
+static int 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;
@@ -676,7 +682,7 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
res = socket->dev->resource + PCI_BRIDGE_RESOURCES + nr;
/* Already allocated? */
if (res->parent)
- return;
+ return 0;
/* The granularity of the memory limit is 4kB, on IO it's 4 bytes */
mask = ~0xfff;
@@ -692,7 +698,7 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
pcibios_bus_to_resource(socket->dev, res, &region);
root = pci_find_parent_resource(socket->dev, res);
if (root && (request_resource(root, res) == 0))
- return;
+ return 0;
printk(KERN_INFO "yenta %s: Preassigned resource %d busy or not available, reconfiguring...\n",
pci_name(socket->dev), nr);
}
@@ -700,35 +706,27 @@ static void yenta_allocate_res(struct yenta_socket *socket, int nr, unsigned typ
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;
- }
+ (yenta_search_res(socket, res, BRIDGE_IO_MIN)))
+ return 1;
} 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;
- }
+ (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
+ return 1;
/* 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;
- }
+ (yenta_search_res(socket, res, BRIDGE_MEM_MIN)))
+ return 1;
}
printk(KERN_INFO "yenta %s: no resource of type %x available, trying to continue...\n",
pci_name(socket->dev), type);
res->start = res->end = res->flags = 0;
+ return 0;
}
/*
@@ -736,14 +734,17 @@ 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_IO,
+ int program = 0;
+ program += yenta_allocate_res(socket, 0, IORESOURCE_IO,
PCI_CB_IO_BASE_0, PCI_CB_IO_LIMIT_0);
- yenta_allocate_res(socket, 1, IORESOURCE_IO,
+ program += 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,
+ program += 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,
+ program += yenta_allocate_res(socket, 3, IORESOURCE_MEM,
PCI_CB_MEMORY_BASE_1, PCI_CB_MEMORY_LIMIT_1);
+ if (program)
+ pci_setup_cardbus(socket->dev->subordinate);
}
@@ -758,7 +759,7 @@ static void yenta_free_resources(struct yenta_socket *socket)
res = socket->dev->resource + PCI_BRIDGE_RESOURCES + i;
if (res->start != 0 && res->end != 0)
release_resource(res);
- res->start = res->end = 0;
+ res->start = res->end = res->flags = 0;
}
}