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author | Thomas Gleixner <tglx@linutronix.de> | 2010-10-16 10:35:51 +0200 |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2010-10-27 14:30:01 +0200 |
commit | 3b3da9d25ae9d8cac99302ad66834499cf324d08 (patch) | |
tree | 2592a4d15335d49a06de24498b798a52c9f964c0 /arch/x86/platform | |
parent | c4e72ad6bbbbbf1f826df3a5d3e3c4af2f4d48c9 (diff) | |
download | kernel_samsung_tuna-3b3da9d25ae9d8cac99302ad66834499cf324d08.zip kernel_samsung_tuna-3b3da9d25ae9d8cac99302ad66834499cf324d08.tar.gz kernel_samsung_tuna-3b3da9d25ae9d8cac99302ad66834499cf324d08.tar.bz2 |
x86: Move scx200 to platform
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/platform')
-rw-r--r-- | arch/x86/platform/Makefile | 1 | ||||
-rw-r--r-- | arch/x86/platform/scx200/Makefile | 2 | ||||
-rw-r--r-- | arch/x86/platform/scx200/scx200_32.c | 131 |
3 files changed, 134 insertions, 0 deletions
diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile index e629d7a..1191989 100644 --- a/arch/x86/platform/Makefile +++ b/arch/x86/platform/Makefile @@ -1,4 +1,5 @@ # Platform specific code goes here obj-y += efi/ +obj-y += scx200/ obj-y += sfi/ obj-y += visws/ diff --git a/arch/x86/platform/scx200/Makefile b/arch/x86/platform/scx200/Makefile new file mode 100644 index 0000000..762b4c7 --- /dev/null +++ b/arch/x86/platform/scx200/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_SCx200) += scx200.o +scx200-y += scx200_32.o diff --git a/arch/x86/platform/scx200/scx200_32.c b/arch/x86/platform/scx200/scx200_32.c new file mode 100644 index 0000000..7e004ac --- /dev/null +++ b/arch/x86/platform/scx200/scx200_32.c @@ -0,0 +1,131 @@ +/* + * 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; +unsigned 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")) { + 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); |