fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / arch / i386 / kernel / scx200.c

diff --git a/arch/i386/kernel/scx200.c b/arch/i386/kernel/scx200.c
index d02df17..c7d3df2 100644 (file)
--- a/arch/i386/kernel/scx200.c
+++ b/arch/i386/kernel/scx200.c
@@ -4,14 +4,18 @@
 
    National Semiconductor SCx200 support. */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/mutex.h>
 #include <linux/pci.h>
 
 #include <linux/scx200.h>
+#include <linux/scx200_gpio.h>
+
+/* Verify that the configuration block really is there */
+#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base))
 
 #define NAME "scx200"
 
@@ -22,9 +26,13 @@ MODULE_LICENSE("GPL");
 unsigned scx200_gpio_base = 0;
 long scx200_gpio_shadow[2];
 
+unsigned scx200_cb_base = 0;
+
 static struct pci_device_id scx200_tbl[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
        { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
+       { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_XBUS)   },
+       { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_XBUS)   },
        { },
 };
 MODULE_DEVICE_TABLE(pci,scx200_tbl);
@@ -37,38 +45,58 @@ static struct pci_driver scx200_pci_driver = {
        .probe = scx200_probe,
 };
 
-DEFINE_SPINLOCK(scx200_gpio_lock);
-static DEFINE_SPINLOCK(scx200_gpio_config_lock);
+static DEFINE_MUTEX(scx200_gpio_config_lock);
 
-static int __devinit scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+static void __devinit scx200_init_shadow(void)
 {
        int bank;
-       unsigned base;
-
-       base = pci_resource_start(pdev, 0);
-       printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);
-
-       if (request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO") == 0) {
-               printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
-               return -EBUSY;
-       }
-
-       scx200_gpio_base = base;
 
        /* read the current values driven on the GPIO signals */
        for (bank = 0; bank < 2; ++bank)
                scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank);
+}
 
-       return 0;
+static int __devinit scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+       unsigned base;
+
+       if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE ||
+           pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) {
+               base = pci_resource_start(pdev, 0);
+               printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);
+
+               if (request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO") == 0) {
+                       printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
+                       return -EBUSY;
+               }
+
+               scx200_gpio_base = base;
+               scx200_init_shadow();
+
+       } else {
+               /* find the base of the Configuration Block */
+               if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) {
+                       scx200_cb_base = SCx200_CB_BASE_FIXED;
+               } else {
+                       pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base);
+                       if (scx200_cb_probe(base)) {
+                               scx200_cb_base = base;
+                       } else {
+                               printk(KERN_WARNING NAME ": Configuration Block not found\n");
+                               return -ENODEV;
+                       }
+               }
+               printk(KERN_INFO NAME ": Configuration Block base 0x%x\n", scx200_cb_base);
+       }
 
+       return 0;
 }
 
-u32 scx200_gpio_configure(int index, u32 mask, u32 bits)
+u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits)
 {
        u32 config, new_config;
-       unsigned long flags;
 
-       spin_lock_irqsave(&scx200_gpio_config_lock, flags);
+       mutex_lock(&scx200_gpio_config_lock);
 
        outl(index, scx200_gpio_base + 0x20);
        config = inl(scx200_gpio_base + 0x24);
@@ -76,51 +104,19 @@ u32 scx200_gpio_configure(int index, u32 mask, u32 bits)
        new_config = (config & mask) | bits;
        outl(new_config, scx200_gpio_base + 0x24);
 
-       spin_unlock_irqrestore(&scx200_gpio_config_lock, flags);
+       mutex_unlock(&scx200_gpio_config_lock);
 
        return config;
 }
 
-void scx200_gpio_dump(unsigned index)
-{
-       u32 config = scx200_gpio_configure(index, ~0, 0);
-       printk(KERN_DEBUG "GPIO%02u: 0x%08lx", index, (unsigned long)config);
-       
-       if (config & 1) 
-               printk(" OE"); /* output enabled */
-       else
-               printk(" TS"); /* tristate */
-       if (config & 2) 
-               printk(" PP"); /* push pull */
-       else
-               printk(" OD"); /* open drain */
-       if (config & 4) 
-               printk(" PUE"); /* pull up enabled */
-       else
-               printk(" PUD"); /* pull up disabled */
-       if (config & 8) 
-               printk(" LOCKED"); /* locked */
-       if (config & 16) 
-               printk(" LEVEL"); /* level input */
-       else
-               printk(" EDGE"); /* edge input */
-       if (config & 32) 
-               printk(" HI"); /* trigger on rising edge */
-       else
-               printk(" LO"); /* trigger on falling edge */
-       if (config & 64) 
-               printk(" DEBOUNCE"); /* debounce */
-       printk("\n");
-}
-
-int __init scx200_init(void)
+static int __init scx200_init(void)
 {
        printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");
 
-       return pci_module_init(&scx200_pci_driver);
+       return pci_register_driver(&scx200_pci_driver);
 }
 
-void __exit scx200_cleanup(void)
+static void __exit scx200_cleanup(void)
 {
        pci_unregister_driver(&scx200_pci_driver);
        release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
@@ -131,13 +127,5 @@ module_exit(scx200_cleanup);
 
 EXPORT_SYMBOL(scx200_gpio_base);
 EXPORT_SYMBOL(scx200_gpio_shadow);
-EXPORT_SYMBOL(scx200_gpio_lock);
 EXPORT_SYMBOL(scx200_gpio_configure);
-EXPORT_SYMBOL(scx200_gpio_dump);
-
-/*
-    Local variables:
-        compile-command: "make -k -C ../../.. SUBDIRS=arch/i386/kernel modules"
-        c-basic-offset: 8
-    End:
-*/
+EXPORT_SYMBOL(scx200_cb_base);