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Dominik Brodowski1a8d4662005-06-27 16:28:53 -07001/*
2 * PCMCIA 16-bit resource management functions
3 *
4 * The initial developer of the original code is David A. Hinds
5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
7 *
8 * Copyright (C) 1999 David A. Hinds
Dominik Brodowski9485ee12010-07-31 07:09:32 +02009 * Copyright (C) 2004-2010 Dominik Brodowski
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070010 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 */
16
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070017#include <linux/module.h>
18#include <linux/kernel.h>
19#include <linux/interrupt.h>
20#include <linux/delay.h>
21#include <linux/pci.h>
22#include <linux/device.h>
Dominik Brodowski91284222009-10-18 23:32:33 +020023#include <linux/netdevice.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090024#include <linux/slab.h>
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070025
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +020026#include <asm/irq.h>
27
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070028#include <pcmcia/ss.h>
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070029#include <pcmcia/cistpl.h>
30#include <pcmcia/cisreg.h>
31#include <pcmcia/ds.h>
32
33#include "cs_internal.h"
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070034
35
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070036/* Access speed for IO windows */
Dominik Brodowski9fea84f2009-12-07 22:11:45 +010037static int io_speed;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070038module_param(io_speed, int, 0444);
39
40
Dominik Brodowskia3ac9af2010-01-06 14:03:03 +010041int pcmcia_validate_mem(struct pcmcia_socket *s)
42{
43 if (s->resource_ops->validate_mem)
44 return s->resource_ops->validate_mem(s);
45 /* if there is no callback, we can assume that everything is OK */
46 return 0;
47}
48
49struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
50 int low, struct pcmcia_socket *s)
51{
52 if (s->resource_ops->find_mem)
53 return s->resource_ops->find_mem(base, num, align, low, s);
54 return NULL;
55}
56
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070057
Dominik Brodowski9485ee12010-07-31 07:09:32 +020058/**
59 * release_io_space() - release IO ports allocated with alloc_io_space()
60 * @s: pcmcia socket
61 * @res: resource to release
62 *
63 */
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +020064static void release_io_space(struct pcmcia_socket *s, struct resource *res)
65{
66 resource_size_t num = resource_size(res);
67 int i;
68
69 dev_dbg(&s->dev, "release_io_space for %pR\n", res);
70
71 for (i = 0; i < MAX_IO_WIN; i++) {
72 if (!s->io[i].res)
73 continue;
74 if ((s->io[i].res->start <= res->start) &&
75 (s->io[i].res->end >= res->end)) {
76 s->io[i].InUse -= num;
77 if (res->parent)
78 release_resource(res);
79 res->start = res->end = 0;
80 res->flags = IORESOURCE_IO;
81 /* Free the window if no one else is using it */
82 if (s->io[i].InUse == 0) {
83 release_resource(s->io[i].res);
84 kfree(s->io[i].res);
85 s->io[i].res = NULL;
86 }
87 }
88 }
Dominik Brodowski9485ee12010-07-31 07:09:32 +020089}
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +020090
Dominik Brodowski9485ee12010-07-31 07:09:32 +020091
92/**
93 * alloc_io_space() - allocate IO ports for use by a PCMCIA device
94 * @s: pcmcia socket
95 * @res: resource to allocate (begin: begin, end: size)
96 * @lines: number of IO lines decoded by the PCMCIA card
Dominik Brodowski1a8d4662005-06-27 16:28:53 -070097 *
98 * Special stuff for managing IO windows, because they are scarce
99 */
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200100static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
101 unsigned int lines)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700102{
Dominik Brodowskib19a7272010-03-20 13:10:47 +0100103 unsigned int align;
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200104 unsigned int base = res->start;
105 unsigned int num = res->end;
106 int ret;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700107
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200108 res->flags |= IORESOURCE_IO;
109
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200110 dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
111 res, lines);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200112
113 align = base ? (lines ? 1<<lines : 0) : 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700114 if (align && (align < num)) {
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200115 if (base) {
116 dev_dbg(&s->dev, "odd IO request\n");
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700117 align = 0;
118 } else
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100119 while (align && (align < num))
120 align <<= 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700121 }
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200122 if (base & ~(align-1)) {
123 dev_dbg(&s->dev, "odd IO request\n");
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700124 align = 0;
125 }
Dominik Brodowskib19a7272010-03-20 13:10:47 +0100126
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200127 ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
128 &res->parent);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200129 if (ret) {
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200130 dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200131 return -EINVAL;
132 }
133
134 res->start = base;
135 res->end = res->start + num - 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700136
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200137 if (res->parent) {
138 ret = request_resource(res->parent, res);
139 if (ret) {
140 dev_warn(&s->dev,
141 "request_resource %pR failed: %d\n", res, ret);
142 res->parent = NULL;
143 release_io_space(s, res);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700144 }
145 }
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200146 dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
147 return ret;
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200148}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700149
150
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200151/**
152 * pcmcia_access_config() - read or write card configuration registers
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700153 *
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200154 * pcmcia_access_config() reads and writes configuration registers in
155 * attribute memory. Memory window 0 is reserved for this and the tuple
156 * reading services. Drivers must use pcmcia_read_config_byte() or
157 * pcmcia_write_config_byte().
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700158 */
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200159static int pcmcia_access_config(struct pcmcia_device *p_dev,
160 off_t where, u8 *val,
161 int (*accessf) (struct pcmcia_socket *s,
162 int attr, unsigned int addr,
163 unsigned int len, void *ptr))
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700164{
Dominik Brodowski855cdf12006-01-10 20:48:59 +0100165 struct pcmcia_socket *s;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700166 config_t *c;
167 int addr;
Dominik Brodowski059f6672010-03-30 18:07:50 +0200168 int ret = 0;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700169
Dominik Brodowski855cdf12006-01-10 20:48:59 +0100170 s = p_dev->socket;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100171
172 mutex_lock(&s->ops_mutex);
Dominik Brodowski855cdf12006-01-10 20:48:59 +0100173 c = p_dev->function_config;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700174
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200175 if (!(c->state & CONFIG_LOCKED)) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200176 dev_dbg(&p_dev->dev, "Configuration isnt't locked\n");
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100177 mutex_unlock(&s->ops_mutex);
Dominik Brodowski943f70f2008-08-03 11:23:42 +0200178 return -EACCES;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200179 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700180
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200181 addr = (p_dev->config_base + where) >> 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700182
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200183 ret = accessf(s, 1, addr, 1, val);
184
Dominik Brodowski059f6672010-03-30 18:07:50 +0200185 mutex_unlock(&s->ops_mutex);
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200186
Dominik Brodowski059f6672010-03-30 18:07:50 +0200187 return ret;
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200188}
Dominik Brodowski1d5cc192010-07-24 12:23:21 +0200189
190
191/**
192 * pcmcia_read_config_byte() - read a byte from a card configuration register
193 *
194 * pcmcia_read_config_byte() reads a byte from a configuration register in
195 * attribute memory.
196 */
197int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
198{
199 return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
200}
201EXPORT_SYMBOL(pcmcia_read_config_byte);
202
203
204/**
205 * pcmcia_write_config_byte() - write a byte to a card configuration register
206 *
207 * pcmcia_write_config_byte() writes a byte to a configuration register in
208 * attribute memory.
209 */
210int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
211{
212 return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
213}
214EXPORT_SYMBOL(pcmcia_write_config_byte);
Dominik Brodowski34481392005-06-27 16:28:54 -0700215
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700216
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200217/**
218 * pcmcia_map_mem_page() - modify iomem window to point to a different offset
219 * @p_dev: pcmcia device
220 * @res: iomem resource already enabled by pcmcia_request_window()
221 * @offset: card_offset to map
222 *
223 * pcmcia_map_mem_page() modifies what can be read and written by accessing
224 * an iomem range previously enabled by pcmcia_request_window(), by setting
225 * the card_offset value to @offset.
226 */
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200227int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res,
Dominik Brodowskib5cb2592010-07-24 18:46:42 +0200228 unsigned int offset)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700229{
Magnus Damm0bdf9b32006-12-13 19:46:53 +0900230 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200231 unsigned int w;
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100232 int ret;
Magnus Damm868575d2006-12-13 19:46:43 +0900233
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200234 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
235 if (w >= MAX_WIN)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200236 return -EINVAL;
Dominik Brodowskib5cb2592010-07-24 18:46:42 +0200237
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100238 mutex_lock(&s->ops_mutex);
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200239 s->win[w].card_start = offset;
240 ret = s->ops->set_mem_map(s, &s->win[w]);
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100241 if (ret)
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200242 dev_warn(&p_dev->dev, "failed to set_mem_map\n");
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100243 mutex_unlock(&s->ops_mutex);
244 return ret;
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200245}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700246EXPORT_SYMBOL(pcmcia_map_mem_page);
247
248
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200249/**
250 * pcmcia_fixup_iowidth() - reduce io width to 8bit
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200251 * @p_dev: pcmcia device
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700252 *
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200253 * pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200254 * IO width to 8bit after having called pcmcia_enable_device()
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200255 * previously.
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700256 */
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200257int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700258{
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200259 struct pcmcia_socket *s = p_dev->socket;
260 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
261 pccard_io_map io_on;
262 int i, ret = 0;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100263
264 mutex_lock(&s->ops_mutex);
Dominik Brodowskidbb22f02006-01-10 20:41:27 +0100265
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200266 dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n");
267
268 if (!(s->state & SOCKET_PRESENT) ||
269 !(p_dev->function_config->state & CONFIG_LOCKED)) {
270 dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
Jiri Slaby4e06e242010-03-16 15:57:44 +0100271 ret = -EACCES;
272 goto unlock;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200273 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700274
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200275 io_on.speed = io_speed;
276 for (i = 0; i < MAX_IO_WIN; i++) {
277 if (!s->io[i].res)
278 continue;
279 io_off.map = i;
280 io_on.map = i;
281
282 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
283 io_on.start = s->io[i].res->start;
284 io_on.stop = s->io[i].res->end;
285
286 s->ops->set_io_map(s, &io_off);
287 mdelay(40);
288 s->ops->set_io_map(s, &io_on);
Dominik Brodowskid8b0a492008-08-03 10:56:13 +0200289 }
Jiri Slaby4e06e242010-03-16 15:57:44 +0100290unlock:
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100291 mutex_unlock(&s->ops_mutex);
Dominik Brodowski4bbed522006-01-15 11:18:12 +0100292
Jiri Slaby4e06e242010-03-16 15:57:44 +0100293 return ret;
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200294}
295EXPORT_SYMBOL(pcmcia_fixup_iowidth);
296
297
298/**
299 * pcmcia_fixup_vpp() - set Vpp to a new voltage level
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200300 * @p_dev: pcmcia device
301 * @new_vpp: new Vpp voltage
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200302 *
303 * pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200304 * a new voltage level between calls to pcmcia_enable_device()
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200305 * and pcmcia_disable_device().
306 */
307int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp)
308{
309 struct pcmcia_socket *s = p_dev->socket;
310 int ret = 0;
311
312 mutex_lock(&s->ops_mutex);
313
314 dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp);
315
316 if (!(s->state & SOCKET_PRESENT) ||
317 !(p_dev->function_config->state & CONFIG_LOCKED)) {
318 dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
319 ret = -EACCES;
320 goto unlock;
321 }
322
323 s->socket.Vpp = new_vpp;
324 if (s->ops->set_socket(s, &s->socket)) {
325 dev_warn(&p_dev->dev, "Unable to set VPP\n");
326 ret = -EIO;
327 goto unlock;
328 }
Dominik Brodowskie8405f02010-07-29 15:50:55 +0200329 p_dev->vpp = new_vpp;
Dominik Brodowskifb49fa52010-07-29 14:06:42 +0200330
331unlock:
332 mutex_unlock(&s->ops_mutex);
333
334 return ret;
335}
336EXPORT_SYMBOL(pcmcia_fixup_vpp);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700337
338
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200339/**
340 * pcmcia_release_configuration() - physically disable a PCMCIA device
341 * @p_dev: pcmcia device
342 *
343 * pcmcia_release_configuration() is the 1:1 counterpart to
344 * pcmcia_enable_device(): If a PCMCIA device is no longer used by any
345 * driver, the Vpp voltage is set to 0, IRQs will no longer be generated,
346 * and I/O ranges will be disabled. As pcmcia_release_io() and
347 * pcmcia_release_window() still need to be called, device drivers are
348 * expected to call pcmcia_disable_device() instead.
349 */
Dominik Brodowski2bc5a9b2005-07-07 17:59:02 -0700350int pcmcia_release_configuration(struct pcmcia_device *p_dev)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700351{
352 pccard_io_map io = { 0, 0, 0, 0, 1 };
Dominik Brodowski2bc5a9b2005-07-07 17:59:02 -0700353 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100354 config_t *c;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700355 int i;
356
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100357 mutex_lock(&s->ops_mutex);
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100358 c = p_dev->function_config;
Dominik Brodowskie2d40962006-03-02 00:09:29 +0100359 if (p_dev->_locked) {
360 p_dev->_locked = 0;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700361 if (--(s->lock_count) == 0) {
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200362 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700363 s->socket.Vpp = 0;
364 s->socket.io_irq = 0;
365 s->ops->set_socket(s, &s->socket);
366 }
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100367 }
368 if (c->state & CONFIG_LOCKED) {
369 c->state &= ~CONFIG_LOCKED;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700370 if (c->state & CONFIG_IO_REQ)
371 for (i = 0; i < MAX_IO_WIN; i++) {
Dominik Brodowskic7d00692006-01-15 08:04:43 +0100372 if (!s->io[i].res)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700373 continue;
374 s->io[i].Config--;
375 if (s->io[i].Config != 0)
376 continue;
377 io.map = i;
378 s->ops->set_io_map(s, &io);
379 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700380 }
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100381 mutex_unlock(&s->ops_mutex);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700382
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200383 return 0;
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200384}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700385
386
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200387/**
388 * pcmcia_release_io() - release I/O allocated by a PCMCIA device
389 * @p_dev: pcmcia device
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700390 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200391 * pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA
392 * device. This may be invoked some time after a card ejection has
393 * already dumped the actual socket configuration, so if the client is
394 * "stale", we don't bother checking the port ranges against the
395 * current socket values.
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700396 */
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200397static int pcmcia_release_io(struct pcmcia_device *p_dev)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700398{
Dominik Brodowski2bc5a9b2005-07-07 17:59:02 -0700399 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100400 int ret = -EINVAL;
401 config_t *c;
402
403 mutex_lock(&s->ops_mutex);
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100404 if (!p_dev->_io)
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100405 goto out;
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100406
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200407 c = p_dev->function_config;
408
409 release_io_space(s, &c->io[0]);
410
411 if (c->io[1].end)
412 release_io_space(s, &c->io[1]);
413
Dominik Brodowskie2d40962006-03-02 00:09:29 +0100414 p_dev->_io = 0;
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100415 c->state &= ~CONFIG_IO_REQ;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700416
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100417out:
418 mutex_unlock(&s->ops_mutex);
419
420 return ret;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700421} /* pcmcia_release_io */
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700422
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200423
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200424/**
425 * pcmcia_release_window() - release reserved iomem for PCMCIA devices
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200426 * @p_dev: pcmcia device
427 * @res: iomem resource to release
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200428 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200429 * pcmcia_release_window() releases &struct resource *res which was
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200430 * previously reserved by calling pcmcia_request_window().
431 */
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200432int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700433{
Magnus Damm0bdf9b32006-12-13 19:46:53 +0900434 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100435 pccard_mem_map *win;
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200436 unsigned int w;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700437
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200438 dev_dbg(&p_dev->dev, "releasing window %pR\n", res);
439
440 w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
441 if (w >= MAX_WIN)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200442 return -EINVAL;
Magnus Damm0bdf9b32006-12-13 19:46:53 +0900443
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100444 mutex_lock(&s->ops_mutex);
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200445 win = &s->win[w];
Magnus Damm0bdf9b32006-12-13 19:46:53 +0900446
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200447 if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200448 dev_dbg(&p_dev->dev, "not releasing unknown window\n");
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100449 mutex_unlock(&s->ops_mutex);
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200450 return -EINVAL;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200451 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700452
453 /* Shut down memory window */
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100454 win->flags &= ~MAP_ACTIVE;
455 s->ops->set_mem_map(s, win);
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200456 s->state &= ~SOCKET_WIN_REQ(w);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700457
458 /* Release system memory */
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100459 if (win->res) {
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200460 release_resource(res);
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100461 release_resource(win->res);
462 kfree(win->res);
463 win->res = NULL;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700464 }
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200465 res->start = res->end = 0;
466 res->flags = IORESOURCE_MEM;
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200467 p_dev->_win &= ~CLIENT_WIN_REQ(w);
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100468 mutex_unlock(&s->ops_mutex);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700469
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200470 return 0;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700471} /* pcmcia_release_window */
472EXPORT_SYMBOL(pcmcia_release_window);
473
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200474
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200475/**
476 * pcmcia_enable_device() - set up and activate a PCMCIA device
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200477 * @p_dev: the associated PCMCIA device
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200478 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200479 * pcmcia_enable_device() physically enables a PCMCIA device. It parses
480 * the flags passed to in @flags and stored in @p_dev->flags and sets up
481 * the Vpp voltage, enables the speaker line, I/O ports and store proper
482 * values to configuration registers.
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200483 */
484int pcmcia_enable_device(struct pcmcia_device *p_dev)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700485{
486 int i;
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200487 unsigned int base;
Dominik Brodowski2bc5a9b2005-07-07 17:59:02 -0700488 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700489 config_t *c;
490 pccard_io_map iomap;
Dominik Brodowskifc301102010-07-29 16:19:39 +0200491 unsigned char status = 0;
492 unsigned char ext_status = 0;
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200493 unsigned char option = 0;
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200494 unsigned int flags = p_dev->config_flags;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700495
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700496 if (!(s->state & SOCKET_PRESENT))
Joe Perchesd598de02009-06-28 09:26:41 -0700497 return -ENODEV;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700498
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100499 mutex_lock(&s->ops_mutex);
Dominik Brodowskidbb22f02006-01-10 20:41:27 +0100500 c = p_dev->function_config;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200501 if (c->state & CONFIG_LOCKED) {
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100502 mutex_unlock(&s->ops_mutex);
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200503 dev_dbg(&p_dev->dev, "Configuration is locked\n");
Dominik Brodowski943f70f2008-08-03 11:23:42 +0200504 return -EACCES;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200505 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700506
507 /* Do power control. We don't allow changes in Vcc. */
Dominik Brodowskie8405f02010-07-29 15:50:55 +0200508 s->socket.Vpp = p_dev->vpp;
Dominik Brodowskid8b0a492008-08-03 10:56:13 +0200509 if (s->ops->set_socket(s, &s->socket)) {
Dominik Brodowski9e86749c2010-01-16 00:26:33 +0100510 mutex_unlock(&s->ops_mutex);
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200511 dev_printk(KERN_WARNING, &p_dev->dev,
Dominik Brodowskid8b0a492008-08-03 10:56:13 +0200512 "Unable to set socket state\n");
513 return -EINVAL;
514 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700515
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700516 /* Pick memory or I/O card, DMA mode, interrupt */
Dominik Brodowski37979e12010-07-29 16:33:23 +0200517 if (p_dev->_io)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700518 s->socket.flags |= SS_IOCARD;
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200519 if (flags & CONF_ENABLE_SPKR) {
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700520 s->socket.flags |= SS_SPKR_ENA;
Dominik Brodowskifc301102010-07-29 16:19:39 +0200521 status = CCSR_AUDIO_ENA;
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200522 if (!(p_dev->config_regs & PRESENT_STATUS))
Dominik Brodowskifc301102010-07-29 16:19:39 +0200523 dev_warn(&p_dev->dev, "speaker requested, but "
524 "PRESENT_STATUS not set!\n");
525 }
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200526 if (flags & CONF_ENABLE_IRQ)
Dominik Brodowski6f840af2010-03-07 10:51:23 +0100527 s->socket.io_irq = s->pcmcia_irq;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700528 else
529 s->socket.io_irq = 0;
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200530 if (flags & CONF_ENABLE_ESR) {
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200531 p_dev->config_regs |= PRESENT_EXT_STATUS;
Dominik Brodowskifc301102010-07-29 16:19:39 +0200532 ext_status = ESR_REQ_ATTN_ENA;
533 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700534 s->ops->set_socket(s, &s->socket);
535 s->lock_count++;
536
Dominik Brodowski1c4a77b2010-09-18 23:21:09 +0200537 dev_dbg(&p_dev->dev,
538 "enable_device: V %d, flags %x, base %x, regs %x, idx %x\n",
539 p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs,
540 p_dev->config_index);
541
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700542 /* Set up CIS configuration registers */
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200543 base = p_dev->config_base;
544 if (p_dev->config_regs & PRESENT_COPY) {
Dominik Brodowski1a4a0462010-07-29 15:54:54 +0200545 u16 tmp = 0;
546 dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n");
547 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp);
548 }
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200549 if (p_dev->config_regs & PRESENT_PIN_REPLACE) {
Dominik Brodowski1a4a0462010-07-29 15:54:54 +0200550 u16 tmp = 0;
551 dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n");
552 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700553 }
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200554 if (p_dev->config_regs & PRESENT_OPTION) {
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700555 if (s->functions == 1) {
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200556 option = p_dev->config_index & COR_CONFIG_MASK;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700557 } else {
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200558 option = p_dev->config_index & COR_MFC_CONFIG_MASK;
559 option |= COR_FUNC_ENA|COR_IREQ_ENA;
560 if (p_dev->config_regs & PRESENT_IOBASE_0)
561 option |= COR_ADDR_DECODE;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700562 }
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200563 if ((flags & CONF_ENABLE_IRQ) &&
564 !(flags & CONF_ENABLE_PULSE_IRQ))
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200565 option |= COR_LEVEL_REQ;
566 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &option);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700567 mdelay(40);
568 }
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200569 if (p_dev->config_regs & PRESENT_STATUS)
Dominik Brodowskifc301102010-07-29 16:19:39 +0200570 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &status);
571
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200572 if (p_dev->config_regs & PRESENT_EXT_STATUS)
Dominik Brodowskifc301102010-07-29 16:19:39 +0200573 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1,
574 &ext_status);
575
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200576 if (p_dev->config_regs & PRESENT_IOBASE_0) {
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200577 u8 b = c->io[0].start & 0xff;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700578 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200579 b = (c->io[0].start >> 8) & 0xff;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700580 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
581 }
Dominik Brodowski7feabb62010-07-29 18:35:47 +0200582 if (p_dev->config_regs & PRESENT_IOSIZE) {
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200583 u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700584 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
585 }
586
587 /* Configure I/O windows */
588 if (c->state & CONFIG_IO_REQ) {
589 iomap.speed = io_speed;
590 for (i = 0; i < MAX_IO_WIN; i++)
Dominik Brodowskic7d00692006-01-15 08:04:43 +0100591 if (s->io[i].res) {
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700592 iomap.map = i;
593 iomap.flags = MAP_ACTIVE;
Dominik Brodowskic7d00692006-01-15 08:04:43 +0100594 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700595 case IO_DATA_PATH_WIDTH_16:
596 iomap.flags |= MAP_16BIT; break;
597 case IO_DATA_PATH_WIDTH_AUTO:
598 iomap.flags |= MAP_AUTOSZ; break;
599 default:
600 break;
601 }
Dominik Brodowskic7d00692006-01-15 08:04:43 +0100602 iomap.start = s->io[i].res->start;
603 iomap.stop = s->io[i].res->end;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700604 s->ops->set_io_map(s, &iomap);
605 s->io[i].Config++;
606 }
607 }
608
609 c->state |= CONFIG_LOCKED;
Dominik Brodowskie2d40962006-03-02 00:09:29 +0100610 p_dev->_locked = 1;
Dominik Brodowski059f6672010-03-30 18:07:50 +0200611 mutex_unlock(&s->ops_mutex);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200612 return 0;
Dominik Brodowski1ac71e52010-07-29 19:27:09 +0200613} /* pcmcia_enable_device */
614EXPORT_SYMBOL(pcmcia_enable_device);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700615
616
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200617/**
618 * pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200619 * @p_dev: the associated PCMCIA device
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700620 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200621 * pcmcia_request_io() attempts to reserve the IO port ranges specified in
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200622 * &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200623 * "start" value is the requested start of the IO port resource; "end"
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200624 * reflects the number of ports requested. The number of IO lines requested
625 * is specified in &struct pcmcia_device @p_dev->io_lines.
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700626 */
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200627int pcmcia_request_io(struct pcmcia_device *p_dev)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700628{
Dominik Brodowski2bc5a9b2005-07-07 17:59:02 -0700629 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200630 config_t *c = p_dev->function_config;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100631 int ret = -EINVAL;
632
633 mutex_lock(&s->ops_mutex);
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200634 dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR",
635 &c->io[0], &c->io[1]);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700636
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200637 if (!(s->state & SOCKET_PRESENT)) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200638 dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n");
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100639 goto out;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200640 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700641
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200642 if (c->state & CONFIG_LOCKED) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200643 dev_dbg(&p_dev->dev, "Configuration is locked\n");
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100644 goto out;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200645 }
Dominik Brodowskif9580952008-08-03 11:40:19 +0200646 if (c->state & CONFIG_IO_REQ) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200647 dev_dbg(&p_dev->dev, "IO already configured\n");
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100648 goto out;
Dominik Brodowskif9580952008-08-03 11:40:19 +0200649 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700650
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200651 ret = alloc_io_space(s, &c->io[0], p_dev->io_lines);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200652 if (ret)
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100653 goto out;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700654
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200655 if (c->io[1].end) {
Dominik Brodowski90abdc32010-07-24 17:23:51 +0200656 ret = alloc_io_space(s, &c->io[1], p_dev->io_lines);
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100657 if (ret) {
Dominik Brodowski7cdffc82010-09-18 10:19:13 +0200658 struct resource tmp = c->io[0];
659 /* release the previously allocated resource */
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200660 release_io_space(s, &c->io[0]);
Dominik Brodowski7cdffc82010-09-18 10:19:13 +0200661 /* but preserve the settings, for they worked... */
662 c->io[0].end = resource_size(&tmp);
663 c->io[0].start = tmp.start;
664 c->io[0].flags = tmp.flags;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100665 goto out;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700666 }
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200667 } else
668 c->io[1].start = 0;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700669
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700670 c->state |= CONFIG_IO_REQ;
Dominik Brodowskie2d40962006-03-02 00:09:29 +0100671 p_dev->_io = 1;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100672
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200673 dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR",
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200674 &c->io[0], &c->io[1]);
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100675out:
676 mutex_unlock(&s->ops_mutex);
677
678 return ret;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700679} /* pcmcia_request_io */
680EXPORT_SYMBOL(pcmcia_request_io);
681
682
Dominik Brodowskieb141202010-03-07 12:21:16 +0100683/**
684 * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200685 * @p_dev: the associated PCMCIA device
686 * @handler: IRQ handler to register
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700687 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200688 * pcmcia_request_irq() is a wrapper around request_irq() which allows
Dominik Brodowskieb141202010-03-07 12:21:16 +0100689 * the PCMCIA core to clean up the registration in pcmcia_disable_device().
690 * Drivers are free to use request_irq() directly, but then they need to
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200691 * call free_irq() themselfves, too. Also, only %IRQF_SHARED capable IRQ
Dominik Brodowskieb141202010-03-07 12:21:16 +0100692 * handlers are allowed.
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700693 */
Dominik Brodowskieb141202010-03-07 12:21:16 +0100694int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev,
695 irq_handler_t handler)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700696{
Dominik Brodowskieb141202010-03-07 12:21:16 +0100697 int ret;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700698
Dominik Brodowskieb141202010-03-07 12:21:16 +0100699 if (!p_dev->irq)
700 return -EINVAL;
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100701
Dominik Brodowskieb141202010-03-07 12:21:16 +0100702 ret = request_irq(p_dev->irq, handler, IRQF_SHARED,
703 p_dev->devname, p_dev->priv);
704 if (!ret)
705 p_dev->_irq = 1;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700706
Dominik Brodowskieb141202010-03-07 12:21:16 +0100707 return ret;
708}
709EXPORT_SYMBOL(pcmcia_request_irq);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700710
Dominik Brodowskieb141202010-03-07 12:21:16 +0100711
712/**
713 * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200714 * @p_dev: the associated PCMCIA device
715 * @handler: IRQ handler to register
Dominik Brodowskieb141202010-03-07 12:21:16 +0100716 *
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200717 * pcmcia_request_exclusive_irq() is a wrapper around request_irq() which
Dominik Brodowskieb141202010-03-07 12:21:16 +0100718 * attempts first to request an exclusive IRQ. If it fails, it also accepts
719 * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
720 * IRQ sharing and either use request_irq directly (then they need to call
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200721 * free_irq() themselves, too), or the pcmcia_request_irq() function.
Dominik Brodowskieb141202010-03-07 12:21:16 +0100722 */
723int __must_check
Dominik Brodowskib19a7272010-03-20 13:10:47 +0100724__pcmcia_request_exclusive_irq(struct pcmcia_device *p_dev,
725 irq_handler_t handler)
Dominik Brodowskieb141202010-03-07 12:21:16 +0100726{
727 int ret;
728
729 if (!p_dev->irq)
730 return -EINVAL;
731
732 ret = request_irq(p_dev->irq, handler, 0, p_dev->devname, p_dev->priv);
733 if (ret) {
734 ret = pcmcia_request_irq(p_dev, handler);
735 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
736 "request for exclusive IRQ could not be fulfilled.\n");
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200737 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
738 "needs updating to supported shared IRQ lines.\n");
739 }
Dominik Brodowskieb141202010-03-07 12:21:16 +0100740 if (ret)
741 dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
742 else
743 p_dev->_irq = 1;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200744
Dominik Brodowski94a819f2010-01-17 18:31:34 +0100745 return ret;
Dominik Brodowskieb141202010-03-07 12:21:16 +0100746} /* pcmcia_request_exclusive_irq */
Dominik Brodowskib19a7272010-03-20 13:10:47 +0100747EXPORT_SYMBOL(__pcmcia_request_exclusive_irq);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700748
749
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200750#ifdef CONFIG_PCMCIA_PROBE
751
752/* mask of IRQs already reserved by other cards, we should avoid using them */
Dominik Brodowski127c03c2010-08-03 09:33:45 +0200753static u8 pcmcia_used_irq[32];
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200754
755static irqreturn_t test_action(int cpl, void *dev_id)
756{
757 return IRQ_NONE;
758}
759
760/**
761 * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
762 * @p_dev - the associated PCMCIA device
763 *
764 * locking note: must be called with ops_mutex locked.
765 */
766static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
767{
768 struct pcmcia_socket *s = p_dev->socket;
769 unsigned int try, irq;
770 u32 mask = s->irq_mask;
771 int ret = -ENODEV;
772
773 for (try = 0; try < 64; try++) {
774 irq = try % 32;
775
Dominik Brodowski127c03c2010-08-03 09:33:45 +0200776 if (irq > NR_IRQS)
777 continue;
778
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200779 /* marked as available by driver, not blocked by userspace? */
780 if (!((mask >> irq) & 1))
781 continue;
782
783 /* avoid an IRQ which is already used by another PCMCIA card */
784 if ((try < 32) && pcmcia_used_irq[irq])
785 continue;
786
787 /* register the correct driver, if possible, to check whether
788 * registering a dummy handle works, i.e. if the IRQ isn't
789 * marked as used by the kernel resource management core */
790 ret = request_irq(irq, test_action, type, p_dev->devname,
791 p_dev);
792 if (!ret) {
793 free_irq(irq, p_dev);
Dominik Brodowskieb141202010-03-07 12:21:16 +0100794 p_dev->irq = s->pcmcia_irq = irq;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200795 pcmcia_used_irq[irq]++;
796 break;
797 }
798 }
799
800 return ret;
801}
802
803void pcmcia_cleanup_irq(struct pcmcia_socket *s)
804{
Dominik Brodowski6f840af2010-03-07 10:51:23 +0100805 pcmcia_used_irq[s->pcmcia_irq]--;
806 s->pcmcia_irq = 0;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200807}
808
809#else /* CONFIG_PCMCIA_PROBE */
810
811static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
812{
813 return -EINVAL;
814}
815
816void pcmcia_cleanup_irq(struct pcmcia_socket *s)
817{
Dominik Brodowski6f840af2010-03-07 10:51:23 +0100818 s->pcmcia_irq = 0;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200819 return;
820}
821
822#endif /* CONFIG_PCMCIA_PROBE */
823
824
825/**
826 * pcmcia_setup_irq() - determine IRQ to be used for device
827 * @p_dev - the associated PCMCIA device
828 *
829 * locking note: must be called with ops_mutex locked.
830 */
831int pcmcia_setup_irq(struct pcmcia_device *p_dev)
832{
833 struct pcmcia_socket *s = p_dev->socket;
834
Dominik Brodowskieb141202010-03-07 12:21:16 +0100835 if (p_dev->irq)
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200836 return 0;
837
838 /* already assigned? */
Dominik Brodowski6f840af2010-03-07 10:51:23 +0100839 if (s->pcmcia_irq) {
Dominik Brodowskieb141202010-03-07 12:21:16 +0100840 p_dev->irq = s->pcmcia_irq;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200841 return 0;
842 }
843
844 /* prefer an exclusive ISA irq */
845 if (!pcmcia_setup_isa_irq(p_dev, 0))
846 return 0;
847
848 /* but accept a shared ISA irq */
849 if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
850 return 0;
851
852 /* but use the PCI irq otherwise */
853 if (s->pci_irq) {
Dominik Brodowskieb141202010-03-07 12:21:16 +0100854 p_dev->irq = s->pcmcia_irq = s->pci_irq;
Dominik Brodowski6f0f38c2010-04-08 20:33:16 +0200855 return 0;
856 }
857
858 return -EINVAL;
859}
860
861
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200862/**
863 * pcmcia_request_window() - attempt to reserve iomem for PCMCIA devices
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200864 * @p_dev: the associated PCMCIA device
865 * @res: &struct resource pointing to p_dev->resource[2..5]
866 * @speed: access speed
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700867 *
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200868 * pcmcia_request_window() attepts to reserve an iomem ranges specified in
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200869 * &struct resource @res pointing to one of the entries in
870 * &struct pcmcia_device @p_dev->resource[2..5]. The "start" value is the
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200871 * requested start of the IO mem resource; "end" reflects the size
872 * requested.
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700873 */
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200874int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res,
875 unsigned int speed)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700876{
Dominik Brodowski6838b032009-11-03 01:31:52 +0100877 struct pcmcia_socket *s = p_dev->socket;
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100878 pccard_mem_map *win;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700879 u_long align;
880 int w;
881
Dominik Brodowski1c4a77b2010-09-18 23:21:09 +0200882 dev_dbg(&p_dev->dev, "request_window %pR %d\n", res, speed);
883
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200884 if (!(s->state & SOCKET_PRESENT)) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200885 dev_dbg(&p_dev->dev, "No card present\n");
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200886 return -ENODEV;
Dominik Brodowski6d9a2992009-10-24 12:20:18 +0200887 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700888
889 /* Window size defaults to smallest available */
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200890 if (res->end == 0)
891 res->end = s->map_size;
892 align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size;
893 if (res->end & (s->map_size-1)) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200894 dev_dbg(&p_dev->dev, "invalid map size\n");
Dominik Brodowski69ba4432008-08-03 12:10:53 +0200895 return -EINVAL;
896 }
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200897 if ((res->start && (s->features & SS_CAP_STATIC_MAP)) ||
898 (res->start & (align-1))) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200899 dev_dbg(&p_dev->dev, "invalid base address\n");
Dominik Brodowski69ba4432008-08-03 12:10:53 +0200900 return -EINVAL;
901 }
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200902 if (res->start)
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700903 align = 0;
904
905 /* Allocate system memory window */
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200906 mutex_lock(&s->ops_mutex);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700907 for (w = 0; w < MAX_WIN; w++)
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100908 if (!(s->state & SOCKET_WIN_REQ(w)))
909 break;
Dominik Brodowskif9580952008-08-03 11:40:19 +0200910 if (w == MAX_WIN) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200911 dev_dbg(&p_dev->dev, "all windows are used already\n");
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200912 mutex_unlock(&s->ops_mutex);
Dominik Brodowskif9580952008-08-03 11:40:19 +0200913 return -EINVAL;
914 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700915
916 win = &s->win[w];
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700917
918 if (!(s->features & SS_CAP_STATIC_MAP)) {
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200919 win->res = pcmcia_find_mem_region(res->start, res->end, align,
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200920 0, s);
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100921 if (!win->res) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200922 dev_dbg(&p_dev->dev, "allocating mem region failed\n");
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100923 mutex_unlock(&s->ops_mutex);
Dominik Brodowskif9580952008-08-03 11:40:19 +0200924 return -EINVAL;
925 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700926 }
Dominik Brodowski6838b032009-11-03 01:31:52 +0100927 p_dev->_win |= CLIENT_WIN_REQ(w);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700928
929 /* Configure the socket controller */
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100930 win->map = w+1;
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200931 win->flags = res->flags & WIN_FLAGS_MAP;
932 win->speed = speed;
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100933 win->card_start = 0;
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100934
Dominik Brodowski82f88e32009-11-03 01:16:12 +0100935 if (s->ops->set_mem_map(s, win) != 0) {
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200936 dev_dbg(&p_dev->dev, "failed to set memory mapping\n");
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100937 mutex_unlock(&s->ops_mutex);
Dominik Brodowski926c5402008-08-03 12:15:11 +0200938 return -EIO;
939 }
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700940 s->state |= SOCKET_WIN_REQ(w);
941
942 /* Return window handle */
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100943 if (s->features & SS_CAP_STATIC_MAP)
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200944 res->start = win->static_start;
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100945 else
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200946 res->start = win->res->start;
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100947
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200948 /* convert to new-style resources */
Dominik Brodowskicdb13802010-07-28 10:59:06 +0200949 res->end += res->start - 1;
950 res->flags &= ~WIN_FLAGS_REQ;
951 res->flags |= (win->map << 2) | IORESOURCE_MEM;
Dominik Brodowskiad0c7be2010-07-25 13:10:22 +0200952 res->parent = win->res;
953 if (win->res)
954 request_resource(&iomem_resource, res);
955
Dominik Brodowskieb838fe2010-09-13 16:51:36 +0200956 dev_dbg(&p_dev->dev, "request_window results in %pR\n", res);
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200957
Dominik Brodowski6b8e0872010-01-12 21:42:51 +0100958 mutex_unlock(&s->ops_mutex);
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700959
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200960 return 0;
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700961} /* pcmcia_request_window */
962EXPORT_SYMBOL(pcmcia_request_window);
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100963
Dominik Brodowski9485ee12010-07-31 07:09:32 +0200964
965/**
966 * pcmcia_disable_device() - disable and clean up a PCMCIA device
967 * @p_dev: the associated PCMCIA device
968 *
969 * pcmcia_disable_device() is the driver-callable counterpart to
970 * pcmcia_enable_device(): If a PCMCIA device is no longer used,
971 * drivers are expected to clean up and disable the device by calling
972 * this function. Any I/O ranges (iomem and ioports) will be released,
973 * the Vpp voltage will be set to 0, and IRQs will no longer be
974 * generated -- at least if there is no other card function (of
975 * multifunction devices) being used.
976 */
Dominik Brodowski9fea84f2009-12-07 22:11:45 +0100977void pcmcia_disable_device(struct pcmcia_device *p_dev)
978{
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200979 int i;
Dominik Brodowski1c4a77b2010-09-18 23:21:09 +0200980
981 dev_dbg(&p_dev->dev, "disabling device\n");
982
Dominik Brodowski0ca724d2010-07-24 19:03:02 +0200983 for (i = 0; i < MAX_WIN; i++) {
984 struct resource *res = p_dev->resource[MAX_IO_WIN + i];
985 if (res->flags & WIN_FLAGS_REQ)
986 pcmcia_release_window(p_dev, res);
987 }
988
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100989 pcmcia_release_configuration(p_dev);
Dominik Brodowski2ce49052010-07-24 13:14:44 +0200990 pcmcia_release_io(p_dev);
Patrick McHardy418c5272010-07-20 15:21:42 -0700991 if (p_dev->_irq) {
Dominik Brodowskieb141202010-03-07 12:21:16 +0100992 free_irq(p_dev->irq, p_dev->priv);
Patrick McHardy418c5272010-07-20 15:21:42 -0700993 p_dev->_irq = 0;
994 }
Dominik Brodowski5f2a71f2006-01-15 09:32:39 +0100995}
996EXPORT_SYMBOL(pcmcia_disable_device);