835c34a168
Since the x86 merge, lots of files that referenced their own filenames are no longer correct. Rather than keep them up to date, just delete them, as they add no real value. Additionally: - fix up comment formatting in scx200_32.c - Remove a credit from myself in setup_64.c from a time when we had no SCM - remove longwinded history from tsc_32.c which can be figured out from git. Signed-off-by: Dave Jones <davej@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
132 lines
3.3 KiB
C
132 lines
3.3 KiB
C
/*
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* Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
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*
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* National Semiconductor SCx200 support.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/pci.h>
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#include <linux/scx200.h>
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#include <linux/scx200_gpio.h>
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/* Verify that the configuration block really is there */
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#define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base))
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#define NAME "scx200"
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MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");
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MODULE_DESCRIPTION("NatSemi SCx200 Driver");
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MODULE_LICENSE("GPL");
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unsigned scx200_gpio_base = 0;
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long scx200_gpio_shadow[2];
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unsigned scx200_cb_base = 0;
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static struct pci_device_id scx200_tbl[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) },
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) },
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SCx200_XBUS) },
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{ PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_SC1100_XBUS) },
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{ },
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};
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MODULE_DEVICE_TABLE(pci,scx200_tbl);
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static int __devinit scx200_probe(struct pci_dev *, const struct pci_device_id *);
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static struct pci_driver scx200_pci_driver = {
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.name = "scx200",
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.id_table = scx200_tbl,
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.probe = scx200_probe,
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};
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static DEFINE_MUTEX(scx200_gpio_config_lock);
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static void __devinit scx200_init_shadow(void)
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{
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int bank;
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/* read the current values driven on the GPIO signals */
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for (bank = 0; bank < 2; ++bank)
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scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank);
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}
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static int __devinit scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
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{
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unsigned base;
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if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE ||
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pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) {
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base = pci_resource_start(pdev, 0);
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printk(KERN_INFO NAME ": GPIO base 0x%x\n", base);
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if (request_region(base, SCx200_GPIO_SIZE, "NatSemi SCx200 GPIO") == 0) {
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printk(KERN_ERR NAME ": can't allocate I/O for GPIOs\n");
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return -EBUSY;
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}
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scx200_gpio_base = base;
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scx200_init_shadow();
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} else {
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/* find the base of the Configuration Block */
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if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) {
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scx200_cb_base = SCx200_CB_BASE_FIXED;
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} else {
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pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base);
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if (scx200_cb_probe(base)) {
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scx200_cb_base = base;
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} else {
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printk(KERN_WARNING NAME ": Configuration Block not found\n");
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return -ENODEV;
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}
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}
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printk(KERN_INFO NAME ": Configuration Block base 0x%x\n", scx200_cb_base);
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}
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return 0;
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}
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u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits)
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{
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u32 config, new_config;
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mutex_lock(&scx200_gpio_config_lock);
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outl(index, scx200_gpio_base + 0x20);
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config = inl(scx200_gpio_base + 0x24);
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new_config = (config & mask) | bits;
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outl(new_config, scx200_gpio_base + 0x24);
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mutex_unlock(&scx200_gpio_config_lock);
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return config;
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}
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static int __init scx200_init(void)
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{
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printk(KERN_INFO NAME ": NatSemi SCx200 Driver\n");
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return pci_register_driver(&scx200_pci_driver);
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}
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static void __exit scx200_cleanup(void)
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{
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pci_unregister_driver(&scx200_pci_driver);
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release_region(scx200_gpio_base, SCx200_GPIO_SIZE);
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}
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module_init(scx200_init);
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module_exit(scx200_cleanup);
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EXPORT_SYMBOL(scx200_gpio_base);
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EXPORT_SYMBOL(scx200_gpio_shadow);
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EXPORT_SYMBOL(scx200_gpio_configure);
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EXPORT_SYMBOL(scx200_cb_base);
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