forked from Minki/linux
d424aa8744
Shrink scx200_gpio_dump() to a single printk with ternary ops. The function is still ifdef'd out, this is corrected in next patch, when it is actually used. The patch 'inadvertently' changed loglevel from DEBUG to INFO. This is Good, because in next patch, its wired to a 'command' which the user can invoke when they want. When they do so, its because they want INFO to support their developement effort, and we want to give it to them without compiling a DEBUG version of the driver. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/* linux/arch/i386/kernel/scx200.c
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Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
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National Semiconductor SCx200 support. */
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#include <linux/config.h>
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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/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_SPINLOCK(scx200_gpio_config_lock);
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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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int bank;
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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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/* 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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} 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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unsigned long flags;
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spin_lock_irqsave(&scx200_gpio_config_lock, flags);
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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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spin_unlock_irqrestore(&scx200_gpio_config_lock, flags);
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return config;
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}
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#if 0
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void scx200_gpio_dump(unsigned index)
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{
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u32 config = scx200_gpio_configure(index, ~0, 0);
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printk(KERN_INFO NAME ": GPIO-%02u: 0x%08lx %s %s %s %s %s %s %s\n",
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index, (unsigned long) config,
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(config & 1) ? "OE" : "TS", /* output enabled / tristate */
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(config & 2) ? "PP" : "OD", /* push pull / open drain */
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(config & 4) ? "PUE" : "PUD", /* pull up enabled/disabled */
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(config & 8) ? "LOCKED" : "", /* locked / unlocked */
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(config & 16) ? "LEVEL" : "EDGE", /* level/edge input */
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(config & 32) ? "HI" : "LO", /* trigger on rising/falling edge */
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(config & 64) ? "DEBOUNCE" : ""); /* debounce */
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}
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#endif /* 0 */
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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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