Dave Jones | 835c34a | 2007-10-12 21:10:53 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com> |
| 3 | * |
| 4 | * National Semiconductor SCx200 support. |
| 5 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/module.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/init.h> |
Jim Cromie | 8bcf613 | 2006-06-27 02:54:25 -0700 | [diff] [blame] | 11 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | #include <linux/pci.h> |
| 13 | |
| 14 | #include <linux/scx200.h> |
Adrian Bunk | cc658cf | 2005-11-07 00:58:37 -0800 | [diff] [blame] | 15 | #include <linux/scx200_gpio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | |
| 17 | /* Verify that the configuration block really is there */ |
| 18 | #define scx200_cb_probe(base) (inw((base) + SCx200_CBA) == (base)) |
| 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>"); |
| 21 | MODULE_DESCRIPTION("NatSemi SCx200 Driver"); |
| 22 | MODULE_LICENSE("GPL"); |
| 23 | |
| 24 | unsigned scx200_gpio_base = 0; |
Al Viro | 64b3361 | 2007-10-14 19:35:20 +0100 | [diff] [blame] | 25 | unsigned long scx200_gpio_shadow[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | unsigned scx200_cb_base = 0; |
| 28 | |
| 29 | static struct pci_device_id scx200_tbl[] = { |
Jim Cromie | 0ac2526 | 2012-02-01 10:47:01 -0700 | [diff] [blame] | 30 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_BRIDGE) }, |
| 31 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SC1100_BRIDGE) }, |
| 32 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SCx200_XBUS) }, |
| 33 | { PCI_VDEVICE(NS, PCI_DEVICE_ID_NS_SC1100_XBUS) }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | { }, |
| 35 | }; |
| 36 | MODULE_DEVICE_TABLE(pci,scx200_tbl); |
| 37 | |
Greg Kroah-Hartman | a18e369 | 2012-12-21 14:02:53 -0800 | [diff] [blame] | 38 | static int scx200_probe(struct pci_dev *, const struct pci_device_id *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | |
| 40 | static struct pci_driver scx200_pci_driver = { |
| 41 | .name = "scx200", |
| 42 | .id_table = scx200_tbl, |
| 43 | .probe = scx200_probe, |
| 44 | }; |
| 45 | |
Jim Cromie | 8bcf613 | 2006-06-27 02:54:25 -0700 | [diff] [blame] | 46 | static DEFINE_MUTEX(scx200_gpio_config_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Greg Kroah-Hartman | a18e369 | 2012-12-21 14:02:53 -0800 | [diff] [blame] | 48 | static void scx200_init_shadow(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | int bank; |
Jim Cromie | 9b170b8 | 2006-06-27 02:54:17 -0700 | [diff] [blame] | 51 | |
| 52 | /* read the current values driven on the GPIO signals */ |
| 53 | for (bank = 0; bank < 2; ++bank) |
| 54 | scx200_gpio_shadow[bank] = inl(scx200_gpio_base + 0x10 * bank); |
| 55 | } |
| 56 | |
Greg Kroah-Hartman | a18e369 | 2012-12-21 14:02:53 -0800 | [diff] [blame] | 57 | static int scx200_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
Jim Cromie | 9b170b8 | 2006-06-27 02:54:17 -0700 | [diff] [blame] | 58 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | unsigned base; |
| 60 | |
| 61 | if (pdev->device == PCI_DEVICE_ID_NS_SCx200_BRIDGE || |
| 62 | pdev->device == PCI_DEVICE_ID_NS_SC1100_BRIDGE) { |
| 63 | base = pci_resource_start(pdev, 0); |
Jim Cromie | 8ad95f0 | 2012-02-01 10:58:49 -0700 | [diff] [blame] | 64 | pr_info("GPIO base 0x%x\n", base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Jim Cromie | 8ad95f0 | 2012-02-01 10:58:49 -0700 | [diff] [blame] | 66 | if (!request_region(base, SCx200_GPIO_SIZE, |
| 67 | "NatSemi SCx200 GPIO")) { |
| 68 | pr_err("can't allocate I/O for GPIOs\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | return -EBUSY; |
| 70 | } |
| 71 | |
| 72 | scx200_gpio_base = base; |
Jim Cromie | 9b170b8 | 2006-06-27 02:54:17 -0700 | [diff] [blame] | 73 | scx200_init_shadow(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | |
| 75 | } else { |
| 76 | /* find the base of the Configuration Block */ |
| 77 | if (scx200_cb_probe(SCx200_CB_BASE_FIXED)) { |
| 78 | scx200_cb_base = SCx200_CB_BASE_FIXED; |
| 79 | } else { |
| 80 | pci_read_config_dword(pdev, SCx200_CBA_SCRATCH, &base); |
| 81 | if (scx200_cb_probe(base)) { |
| 82 | scx200_cb_base = base; |
| 83 | } else { |
Jim Cromie | 8ad95f0 | 2012-02-01 10:58:49 -0700 | [diff] [blame] | 84 | pr_warn("Configuration Block not found\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | return -ENODEV; |
| 86 | } |
| 87 | } |
Jim Cromie | 8ad95f0 | 2012-02-01 10:58:49 -0700 | [diff] [blame] | 88 | pr_info("Configuration Block base 0x%x\n", scx200_cb_base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | return 0; |
| 92 | } |
| 93 | |
Jim Cromie | 55b8c04 | 2006-06-27 02:54:15 -0700 | [diff] [blame] | 94 | u32 scx200_gpio_configure(unsigned index, u32 mask, u32 bits) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | { |
| 96 | u32 config, new_config; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | |
Jim Cromie | 8bcf613 | 2006-06-27 02:54:25 -0700 | [diff] [blame] | 98 | mutex_lock(&scx200_gpio_config_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | outl(index, scx200_gpio_base + 0x20); |
| 101 | config = inl(scx200_gpio_base + 0x24); |
| 102 | |
| 103 | new_config = (config & mask) | bits; |
| 104 | outl(new_config, scx200_gpio_base + 0x24); |
| 105 | |
Jim Cromie | 8bcf613 | 2006-06-27 02:54:25 -0700 | [diff] [blame] | 106 | mutex_unlock(&scx200_gpio_config_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | return config; |
| 109 | } |
| 110 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | static int __init scx200_init(void) |
| 112 | { |
Jim Cromie | 8ad95f0 | 2012-02-01 10:58:49 -0700 | [diff] [blame] | 113 | pr_info("NatSemi SCx200 Driver\n"); |
Richard Knutsson | d1d6da8 | 2005-11-30 00:59:14 +0100 | [diff] [blame] | 114 | return pci_register_driver(&scx200_pci_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | static void __exit scx200_cleanup(void) |
| 118 | { |
| 119 | pci_unregister_driver(&scx200_pci_driver); |
| 120 | release_region(scx200_gpio_base, SCx200_GPIO_SIZE); |
| 121 | } |
| 122 | |
| 123 | module_init(scx200_init); |
| 124 | module_exit(scx200_cleanup); |
| 125 | |
| 126 | EXPORT_SYMBOL(scx200_gpio_base); |
| 127 | EXPORT_SYMBOL(scx200_gpio_shadow); |
| 128 | EXPORT_SYMBOL(scx200_gpio_configure); |
| 129 | EXPORT_SYMBOL(scx200_cb_base); |