| Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * rsrc_iodyn.c -- Resource management routines for MEM-static sockets. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * The initial developer of the original code is David A. Hinds |
| 9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds |
| 10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
| 11 | * |
| 12 | * (C) 1999 David A. Hinds |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/kernel.h> |
| 17 | |
| 18 | #include <pcmcia/cs_types.h> |
| 19 | #include <pcmcia/ss.h> |
| 20 | #include <pcmcia/cs.h> |
| 21 | #include <pcmcia/cistpl.h> |
| 22 | #include "cs_internal.h" |
| 23 | |
| 24 | |
| 25 | struct pcmcia_align_data { |
| 26 | unsigned long mask; |
| 27 | unsigned long offset; |
| 28 | }; |
| 29 | |
| 30 | static resource_size_t pcmcia_align(void *align_data, |
| 31 | const struct resource *res, |
| 32 | resource_size_t size, resource_size_t align) |
| 33 | { |
| 34 | struct pcmcia_align_data *data = align_data; |
| 35 | resource_size_t start; |
| 36 | |
| 37 | start = (res->start & ~data->mask) + data->offset; |
| 38 | if (start < res->start) |
| 39 | start += data->mask + 1; |
| 40 | |
| 41 | #ifdef CONFIG_X86 |
| 42 | if (res->flags & IORESOURCE_IO) { |
| 43 | if (start & 0x300) |
| 44 | start = (start + 0x3ff) & ~0x3ff; |
| 45 | } |
| 46 | #endif |
| 47 | |
| 48 | #ifdef CONFIG_M68K |
| 49 | if (res->flags & IORESOURCE_IO) { |
| 50 | if ((res->start + size - 1) >= 1024) |
| 51 | start = res->end; |
| 52 | } |
| 53 | #endif |
| 54 | |
| 55 | return start; |
| 56 | } |
| 57 | |
| 58 | |
| 59 | static int iodyn_adjust_io_region(struct resource *res, unsigned long r_start, |
| 60 | unsigned long r_end, struct pcmcia_socket *s) |
| 61 | { |
| 62 | return adjust_resource(res, r_start, r_end - r_start + 1); |
| 63 | } |
| 64 | |
| 65 | |
| 66 | static struct resource *iodyn_find_io_region(unsigned long base, int num, |
| 67 | unsigned long align, struct pcmcia_socket *s) |
| 68 | { |
| 69 | struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO, |
| 70 | dev_name(&s->dev)); |
| 71 | struct pcmcia_align_data data; |
| 72 | unsigned long min = base; |
| 73 | int ret; |
| 74 | |
| 75 | if (align == 0) |
| 76 | align = 0x10000; |
| 77 | |
| 78 | data.mask = align - 1; |
| 79 | data.offset = base & data.mask; |
| 80 | |
| 81 | #ifdef CONFIG_PCI |
| 82 | if (s->cb_dev) { |
| 83 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, |
| 84 | min, 0, pcmcia_align, &data); |
| 85 | } else |
| 86 | #endif |
| 87 | ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, |
| 88 | 1, pcmcia_align, &data); |
| 89 | |
| 90 | if (ret != 0) { |
| 91 | kfree(res); |
| 92 | res = NULL; |
| 93 | } |
| 94 | return res; |
| 95 | } |
| 96 | |
| 97 | struct pccard_resource_ops pccard_iodyn_ops = { |
| 98 | .validate_mem = NULL, |
| 99 | .adjust_io_region = iodyn_adjust_io_region, |
| 100 | .find_io = iodyn_find_io_region, |
| 101 | .find_mem = NULL, |
| 102 | .add_io = NULL, |
| 103 | .add_mem = NULL, |
| 104 | .init = static_init, |
| 105 | .exit = NULL, |
| 106 | }; |
| 107 | EXPORT_SYMBOL(pccard_iodyn_ops); |