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 | |
Tejun Heo | 6d59622 | 2010-03-30 02:52:37 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/kernel.h> |
| 18 | |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 19 | #include <pcmcia/ss.h> |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 20 | #include <pcmcia/cistpl.h> |
| 21 | #include "cs_internal.h" |
| 22 | |
| 23 | |
| 24 | struct pcmcia_align_data { |
| 25 | unsigned long mask; |
| 26 | unsigned long offset; |
| 27 | }; |
| 28 | |
| 29 | static resource_size_t pcmcia_align(void *align_data, |
| 30 | const struct resource *res, |
| 31 | resource_size_t size, resource_size_t align) |
| 32 | { |
| 33 | struct pcmcia_align_data *data = align_data; |
| 34 | resource_size_t start; |
| 35 | |
| 36 | start = (res->start & ~data->mask) + data->offset; |
| 37 | if (start < res->start) |
| 38 | start += data->mask + 1; |
| 39 | |
| 40 | #ifdef CONFIG_X86 |
| 41 | if (res->flags & IORESOURCE_IO) { |
| 42 | if (start & 0x300) |
| 43 | start = (start + 0x3ff) & ~0x3ff; |
| 44 | } |
| 45 | #endif |
| 46 | |
| 47 | #ifdef CONFIG_M68K |
| 48 | if (res->flags & IORESOURCE_IO) { |
| 49 | if ((res->start + size - 1) >= 1024) |
| 50 | start = res->end; |
| 51 | } |
| 52 | #endif |
| 53 | |
| 54 | return start; |
| 55 | } |
| 56 | |
| 57 | |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 58 | static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s, |
| 59 | unsigned long base, int num, |
| 60 | unsigned long align) |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 61 | { |
| 62 | struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO, |
| 63 | dev_name(&s->dev)); |
| 64 | struct pcmcia_align_data data; |
| 65 | unsigned long min = base; |
| 66 | int ret; |
| 67 | |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 68 | data.mask = align - 1; |
| 69 | data.offset = base & data.mask; |
| 70 | |
| 71 | #ifdef CONFIG_PCI |
| 72 | if (s->cb_dev) { |
| 73 | ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1, |
| 74 | min, 0, pcmcia_align, &data); |
| 75 | } else |
| 76 | #endif |
| 77 | ret = allocate_resource(&ioport_resource, res, num, min, ~0UL, |
| 78 | 1, pcmcia_align, &data); |
| 79 | |
| 80 | if (ret != 0) { |
| 81 | kfree(res); |
| 82 | res = NULL; |
| 83 | } |
| 84 | return res; |
| 85 | } |
| 86 | |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 87 | static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr, |
| 88 | unsigned int *base, unsigned int num, |
Dominik Brodowski | ad0c7be | 2010-07-25 13:10:22 +0200 | [diff] [blame] | 89 | unsigned int align, struct resource **parent) |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 90 | { |
| 91 | int i, ret = 0; |
| 92 | |
| 93 | /* Check for an already-allocated window that must conflict with |
| 94 | * what was asked for. It is a hack because it does not catch all |
| 95 | * potential conflicts, just the most obvious ones. |
| 96 | */ |
| 97 | for (i = 0; i < MAX_IO_WIN; i++) { |
| 98 | if (!s->io[i].res) |
| 99 | continue; |
| 100 | |
| 101 | if (!*base) |
| 102 | continue; |
| 103 | |
| 104 | if ((s->io[i].res->start & (align-1)) == *base) |
| 105 | return -EBUSY; |
| 106 | } |
| 107 | |
| 108 | for (i = 0; i < MAX_IO_WIN; i++) { |
| 109 | struct resource *res = s->io[i].res; |
| 110 | unsigned int try; |
| 111 | |
| 112 | if (res && (res->flags & IORESOURCE_BITS) != |
| 113 | (attr & IORESOURCE_BITS)) |
| 114 | continue; |
| 115 | |
| 116 | if (!res) { |
| 117 | if (align == 0) |
| 118 | align = 0x10000; |
| 119 | |
| 120 | res = s->io[i].res = __iodyn_find_io_region(s, *base, |
| 121 | num, align); |
| 122 | if (!res) |
| 123 | return -EINVAL; |
| 124 | |
| 125 | *base = res->start; |
| 126 | s->io[i].res->flags = |
| 127 | ((res->flags & ~IORESOURCE_BITS) | |
| 128 | (attr & IORESOURCE_BITS)); |
| 129 | s->io[i].InUse = num; |
Dominik Brodowski | ad0c7be | 2010-07-25 13:10:22 +0200 | [diff] [blame] | 130 | *parent = res; |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 131 | return 0; |
| 132 | } |
| 133 | |
| 134 | /* Try to extend top of window */ |
| 135 | try = res->end + 1; |
| 136 | if ((*base == 0) || (*base == try)) { |
| 137 | if (adjust_resource(s->io[i].res, res->start, |
| 138 | res->end - res->start + num + 1)) |
| 139 | continue; |
| 140 | *base = try; |
| 141 | s->io[i].InUse += num; |
Dominik Brodowski | ad0c7be | 2010-07-25 13:10:22 +0200 | [diff] [blame] | 142 | *parent = res; |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 143 | return 0; |
| 144 | } |
| 145 | |
| 146 | /* Try to extend bottom of window */ |
| 147 | try = res->start - num; |
| 148 | if ((*base == 0) || (*base == try)) { |
| 149 | if (adjust_resource(s->io[i].res, |
| 150 | res->start - num, |
| 151 | res->end - res->start + num + 1)) |
| 152 | continue; |
| 153 | *base = try; |
| 154 | s->io[i].InUse += num; |
Dominik Brodowski | ad0c7be | 2010-07-25 13:10:22 +0200 | [diff] [blame] | 155 | *parent = res; |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 156 | return 0; |
| 157 | } |
| 158 | } |
| 159 | |
| 160 | return -EINVAL; |
| 161 | } |
| 162 | |
| 163 | |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 164 | struct pccard_resource_ops pccard_iodyn_ops = { |
| 165 | .validate_mem = NULL, |
Dominik Brodowski | b19a727 | 2010-03-20 13:10:47 +0100 | [diff] [blame] | 166 | .find_io = iodyn_find_io, |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 167 | .find_mem = NULL, |
Dominik Brodowski | 49b1153 | 2010-03-07 16:41:57 +0100 | [diff] [blame] | 168 | .init = static_init, |
| 169 | .exit = NULL, |
| 170 | }; |
| 171 | EXPORT_SYMBOL(pccard_iodyn_ops); |