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authorThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:01 +0200
committerThomas Gleixner <tglx@linutronix.de>2007-10-11 11:17:01 +0200
commit9a163ed8e0552fdcffe405d2ea7134819a81456e (patch)
treeb322fd2afbb812ba7ddfd22f3734aaab007c2aa5 /arch/x86/kernel/scx200_32.c
parentf7627e2513987bb5d4e8cb13c4e0a478352141ac (diff)
i386: move kernel
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/scx200_32.c')
-rw-r--r--arch/x86/kernel/scx200_32.c131
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/x86/kernel/scx200_32.c b/arch/x86/kernel/scx200_32.c
new file mode 100644
index 00000000000..c7d3df23f58
--- /dev/null
+++ b/arch/x86/kernel/scx200_32.c
@@ -0,0 +1,131 @@
+/* linux/arch/i386/kernel/scx200.c
+
+ Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
+
+ National Semiconductor SCx200 support. */
+
+#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"
+
+MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
+MODULE_DESCRIPTION("NatSemi SCx200 Driver");
+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);
+
+static int __devinit scx200_probe(struct pci_dev *, const struct pci_device_id *);
+
+static struct pci_driver scx200_pci_driver = {
+ .name = "scx200",
+ .id_table = scx200_tbl,
+ .probe = scx200_probe,
+};
+
+static DEFINE_MUTEX(scx200_gpio_config_lock);
+
+static void __devinit scx200_init_shadow(void)
+{
+ int bank;
+
+ /* 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);
+}
+
+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(unsigned index, u32 mask, u32 bits)
+{
+ u32 config, new_config;
+
+ mutex_lock(&scx200_gpio_config_lock);
+
+ outl(index, scx200_gpio_base + 0x20);
+ config = inl(scx200_gpio_base + 0x24);
+
+ new_config = (config & mask) | bits;
+ outl(new_config, scx200_gpio_base + 0x24);
+
+ mutex_unlock(&scx200_gpio_config_lock);
+
+ return config;
+}
+
+static int __init scx200_init(void)
+{
+ printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");
+
+ return pci_register_driver(&scx200_pci_driver);
+}
+
+static void __exit scx200_cleanup(void)
+{
+ pci_unregister_driver(&scx200_pci_driver);
+ release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
+}
+
+module_init(scx200_init);
+module_exit(scx200_cleanup);
+
+EXPORT_SYMBOL(scx200_gpio_base);
+EXPORT_SYMBOL(scx200_gpio_shadow);
+EXPORT_SYMBOL(scx200_gpio_configure);
+EXPORT_SYMBOL(scx200_cb_base);