Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * rsrc_mgr.c -- Resource management routines and/or wrappers |
| 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/config.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/kernel.h> |
| 18 | |
| 19 | #include <pcmcia/cs_types.h> |
| 20 | #include <pcmcia/ss.h> |
| 21 | #include <pcmcia/cs.h> |
| 22 | #include "cs_internal.h" |
| 23 | |
| 24 | |
| 25 | #ifdef CONFIG_PCMCIA_PROBE |
| 26 | |
| 27 | static int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) |
| 28 | { |
| 29 | int irq; |
| 30 | u32 mask; |
| 31 | |
| 32 | irq = adj->resource.irq.IRQ; |
| 33 | if ((irq < 0) || (irq > 15)) |
| 34 | return CS_BAD_IRQ; |
| 35 | |
| 36 | if (adj->Action != REMOVE_MANAGED_RESOURCE) |
| 37 | return 0; |
| 38 | |
| 39 | mask = 1 << irq; |
| 40 | |
| 41 | if (!(s->irq_mask & mask)) |
| 42 | return 0; |
| 43 | |
| 44 | s->irq_mask &= ~mask; |
| 45 | |
| 46 | return 0; |
| 47 | } |
| 48 | |
| 49 | #else |
| 50 | |
| 51 | static inline int adjust_irq(struct pcmcia_socket *s, adjust_t *adj) { |
| 52 | return CS_SUCCESS; |
| 53 | } |
| 54 | |
| 55 | #endif |
| 56 | |
| 57 | |
| 58 | int pcmcia_adjust_resource_info(adjust_t *adj) |
| 59 | { |
| 60 | struct pcmcia_socket *s; |
| 61 | int ret = CS_UNSUPPORTED_FUNCTION; |
| 62 | unsigned long flags; |
| 63 | |
| 64 | down_read(&pcmcia_socket_list_rwsem); |
| 65 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) { |
| 66 | |
| 67 | if (adj->Resource == RES_IRQ) |
| 68 | ret = adjust_irq(s, adj); |
| 69 | |
| 70 | else if (s->resource_ops->adjust_resource) { |
| 71 | |
| 72 | /* you can't use the old interface if the new |
| 73 | * one was used before */ |
| 74 | spin_lock_irqsave(&s->lock, flags); |
| 75 | if ((s->resource_setup_done) && |
| 76 | !(s->resource_setup_old)) { |
| 77 | spin_unlock_irqrestore(&s->lock, flags); |
| 78 | continue; |
| 79 | } else if (!(s->resource_setup_old)) |
| 80 | s->resource_setup_old = 1; |
| 81 | spin_unlock_irqrestore(&s->lock, flags); |
| 82 | |
| 83 | ret = s->resource_ops->adjust_resource(s, adj); |
| 84 | if (!ret) { |
| 85 | /* as there's no way we know this is the |
| 86 | * last call to adjust_resource_info, we |
| 87 | * always need to assume this is the latest |
| 88 | * one... */ |
| 89 | spin_lock_irqsave(&s->lock, flags); |
| 90 | s->resource_setup_done = 1; |
| 91 | spin_unlock_irqrestore(&s->lock, flags); |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | up_read(&pcmcia_socket_list_rwsem); |
| 96 | |
| 97 | return (ret); |
| 98 | } |
| 99 | EXPORT_SYMBOL(pcmcia_adjust_resource_info); |
| 100 | |
| 101 | void pcmcia_validate_mem(struct pcmcia_socket *s) |
| 102 | { |
| 103 | if (s->resource_ops->validate_mem) |
| 104 | s->resource_ops->validate_mem(s); |
| 105 | } |
| 106 | EXPORT_SYMBOL(pcmcia_validate_mem); |
| 107 | |
| 108 | int adjust_io_region(struct resource *res, unsigned long r_start, |
| 109 | unsigned long r_end, struct pcmcia_socket *s) |
| 110 | { |
| 111 | if (s->resource_ops->adjust_io_region) |
| 112 | return s->resource_ops->adjust_io_region(res, r_start, r_end, s); |
| 113 | return -ENOMEM; |
| 114 | } |
| 115 | |
| 116 | struct resource *find_io_region(unsigned long base, int num, |
| 117 | unsigned long align, struct pcmcia_socket *s) |
| 118 | { |
| 119 | if (s->resource_ops->find_io) |
| 120 | return s->resource_ops->find_io(base, num, align, s); |
| 121 | return NULL; |
| 122 | } |
| 123 | |
| 124 | struct resource *find_mem_region(u_long base, u_long num, u_long align, |
| 125 | int low, struct pcmcia_socket *s) |
| 126 | { |
| 127 | if (s->resource_ops->find_mem) |
| 128 | return s->resource_ops->find_mem(base, num, align, low, s); |
| 129 | return NULL; |
| 130 | } |
| 131 | |
| 132 | void release_resource_db(struct pcmcia_socket *s) |
| 133 | { |
| 134 | if (s->resource_ops->exit) |
| 135 | s->resource_ops->exit(s); |
| 136 | } |
| 137 | |
| 138 | |
| 139 | static int static_init(struct pcmcia_socket *s) |
| 140 | { |
| 141 | unsigned long flags; |
| 142 | |
| 143 | /* the good thing about SS_CAP_STATIC_MAP sockets is |
| 144 | * that they don't need a resource database */ |
| 145 | |
| 146 | spin_lock_irqsave(&s->lock, flags); |
| 147 | s->resource_setup_done = 1; |
| 148 | spin_unlock_irqrestore(&s->lock, flags); |
| 149 | |
| 150 | return 0; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | struct pccard_resource_ops pccard_static_ops = { |
| 155 | .validate_mem = NULL, |
| 156 | .adjust_io_region = NULL, |
| 157 | .find_io = NULL, |
| 158 | .find_mem = NULL, |
| 159 | .adjust_resource = NULL, |
| 160 | .init = static_init, |
| 161 | .exit = NULL, |
| 162 | }; |
| 163 | EXPORT_SYMBOL(pccard_static_ops); |