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/drivers/net/wireless/orinoco/spectrum_cs.c

http://github.com/mirrors/linux
C | 321 lines | 192 code | 62 blank | 67 comment | 22 complexity | 8d61548c273c3e3f63fad1de9b377f44 MD5 | raw file
  1/*
  2 * Driver for 802.11b cards using RAM-loadable Symbol firmware, such as
  3 * Symbol Wireless Networker LA4137, CompactFlash cards by Socket
  4 * Communications and Intel PRO/Wireless 2011B.
  5 *
  6 * The driver implements Symbol firmware download.  The rest is handled
  7 * in hermes.c and main.c.
  8 *
  9 * Utilities for downloading the Symbol firmware are available at
 10 * http://sourceforge.net/projects/orinoco/
 11 *
 12 * Copyright (C) 2002-2005 Pavel Roskin <proski@gnu.org>
 13 * Portions based on orinoco_cs.c:
 14 *	Copyright (C) David Gibson, Linuxcare Australia
 15 * Portions based on Spectrum24tDnld.c from original spectrum24 driver:
 16 *	Copyright (C) Symbol Technologies.
 17 *
 18 * See copyright notice in file main.c.
 19 */
 20
 21#define DRIVER_NAME "spectrum_cs"
 22#define PFX DRIVER_NAME ": "
 23
 24#include <linux/module.h>
 25#include <linux/kernel.h>
 26#include <linux/init.h>
 27#include <linux/delay.h>
 28#include <pcmcia/cistpl.h>
 29#include <pcmcia/cisreg.h>
 30#include <pcmcia/ds.h>
 31
 32#include "orinoco.h"
 33
 34/********************************************************************/
 35/* Module stuff							    */
 36/********************************************************************/
 37
 38MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
 39MODULE_DESCRIPTION("Driver for Symbol Spectrum24 Trilogy cards with firmware downloader");
 40MODULE_LICENSE("Dual MPL/GPL");
 41
 42/* Module parameters */
 43
 44/* Some D-Link cards have buggy CIS. They do work at 5v properly, but
 45 * don't have any CIS entry for it. This workaround it... */
 46static int ignore_cis_vcc; /* = 0 */
 47module_param(ignore_cis_vcc, int, 0);
 48MODULE_PARM_DESC(ignore_cis_vcc, "Allow voltage mismatch between card and socket");
 49
 50/********************************************************************/
 51/* Data structures						    */
 52/********************************************************************/
 53
 54/* PCMCIA specific device information (goes in the card field of
 55 * struct orinoco_private */
 56struct orinoco_pccard {
 57	struct pcmcia_device	*p_dev;
 58};
 59
 60/********************************************************************/
 61/* Function prototypes						    */
 62/********************************************************************/
 63
 64static int spectrum_cs_config(struct pcmcia_device *link);
 65static void spectrum_cs_release(struct pcmcia_device *link);
 66
 67/* Constants for the CISREG_CCSR register */
 68#define HCR_RUN		0x07	/* run firmware after reset */
 69#define HCR_IDLE	0x0E	/* don't run firmware after reset */
 70#define HCR_MEM16	0x10	/* memory width bit, should be preserved */
 71
 72
 73/*
 74 * Reset the card using configuration registers COR and CCSR.
 75 * If IDLE is 1, stop the firmware, so that it can be safely rewritten.
 76 */
 77static int
 78spectrum_reset(struct pcmcia_device *link, int idle)
 79{
 80	int ret;
 81	u8 save_cor;
 82	u8 ccsr;
 83
 84	/* Doing it if hardware is gone is guaranteed crash */
 85	if (!pcmcia_dev_present(link))
 86		return -ENODEV;
 87
 88	/* Save original COR value */
 89	ret = pcmcia_read_config_byte(link, CISREG_COR, &save_cor);
 90	if (ret)
 91		goto failed;
 92
 93	/* Soft-Reset card */
 94	ret = pcmcia_write_config_byte(link, CISREG_COR,
 95				(save_cor | COR_SOFT_RESET));
 96	if (ret)
 97		goto failed;
 98	udelay(1000);
 99
100	/* Read CCSR */
101	ret = pcmcia_read_config_byte(link, CISREG_CCSR, &ccsr);
102	if (ret)
103		goto failed;
104
105	/*
106	 * Start or stop the firmware.  Memory width bit should be
107	 * preserved from the value we've just read.
108	 */
109	ccsr = (idle ? HCR_IDLE : HCR_RUN) | (ccsr & HCR_MEM16);
110	ret = pcmcia_write_config_byte(link, CISREG_CCSR, ccsr);
111	if (ret)
112		goto failed;
113	udelay(1000);
114
115	/* Restore original COR configuration index */
116	ret = pcmcia_write_config_byte(link, CISREG_COR,
117				(save_cor & ~COR_SOFT_RESET));
118	if (ret)
119		goto failed;
120	udelay(1000);
121	return 0;
122
123failed:
124	return -ENODEV;
125}
126
127/********************************************************************/
128/* Device methods						    */
129/********************************************************************/
130
131static int
132spectrum_cs_hard_reset(struct orinoco_private *priv)
133{
134	struct orinoco_pccard *card = priv->card;
135	struct pcmcia_device *link = card->p_dev;
136
137	/* Soft reset using COR and HCR */
138	spectrum_reset(link, 0);
139
140	return 0;
141}
142
143static int
144spectrum_cs_stop_firmware(struct orinoco_private *priv, int idle)
145{
146	struct orinoco_pccard *card = priv->card;
147	struct pcmcia_device *link = card->p_dev;
148
149	return spectrum_reset(link, idle);
150}
151
152/********************************************************************/
153/* PCMCIA stuff							    */
154/********************************************************************/
155
156static int
157spectrum_cs_probe(struct pcmcia_device *link)
158{
159	struct orinoco_private *priv;
160	struct orinoco_pccard *card;
161
162	priv = alloc_orinocodev(sizeof(*card), &link->dev,
163				spectrum_cs_hard_reset,
164				spectrum_cs_stop_firmware);
165	if (!priv)
166		return -ENOMEM;
167	card = priv->card;
168
169	/* Link both structures together */
170	card->p_dev = link;
171	link->priv = priv;
172
173	return spectrum_cs_config(link);
174}				/* spectrum_cs_attach */
175
176static void spectrum_cs_detach(struct pcmcia_device *link)
177{
178	struct orinoco_private *priv = link->priv;
179
180	orinoco_if_del(priv);
181
182	spectrum_cs_release(link);
183
184	free_orinocodev(priv);
185}				/* spectrum_cs_detach */
186
187static int spectrum_cs_config_check(struct pcmcia_device *p_dev,
188				    void *priv_data)
189{
190	if (p_dev->config_index == 0)
191		return -EINVAL;
192
193	return pcmcia_request_io(p_dev);
194};
195
196static int
197spectrum_cs_config(struct pcmcia_device *link)
198{
199	struct orinoco_private *priv = link->priv;
200	struct hermes *hw = &priv->hw;
201	int ret;
202	void __iomem *mem;
203
204	link->config_flags |= CONF_AUTO_SET_VPP | CONF_AUTO_CHECK_VCC |
205		CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
206	if (ignore_cis_vcc)
207		link->config_flags &= ~CONF_AUTO_CHECK_VCC;
208	ret = pcmcia_loop_config(link, spectrum_cs_config_check, NULL);
209	if (ret) {
210		if (!ignore_cis_vcc)
211			printk(KERN_ERR PFX "GetNextTuple(): No matching "
212			       "CIS configuration.  Maybe you need the "
213			       "ignore_cis_vcc=1 parameter.\n");
214		goto failed;
215	}
216
217	mem = ioport_map(link->resource[0]->start,
218			resource_size(link->resource[0]));
219	if (!mem)
220		goto failed;
221
222	/* We initialize the hermes structure before completing PCMCIA
223	 * configuration just in case the interrupt handler gets
224	 * called. */
225	hermes_struct_init(hw, mem, HERMES_16BIT_REGSPACING);
226	hw->eeprom_pda = true;
227
228	ret = pcmcia_request_irq(link, orinoco_interrupt);
229	if (ret)
230		goto failed;
231
232	ret = pcmcia_enable_device(link);
233	if (ret)
234		goto failed;
235
236	/* Reset card */
237	if (spectrum_cs_hard_reset(priv) != 0)
238		goto failed;
239
240	/* Initialise the main driver */
241	if (orinoco_init(priv) != 0) {
242		printk(KERN_ERR PFX "orinoco_init() failed\n");
243		goto failed;
244	}
245
246	/* Register an interface with the stack */
247	if (orinoco_if_add(priv, link->resource[0]->start,
248			   link->irq, NULL) != 0) {
249		printk(KERN_ERR PFX "orinoco_if_add() failed\n");
250		goto failed;
251	}
252
253	return 0;
254
255 failed:
256	spectrum_cs_release(link);
257	return -ENODEV;
258}				/* spectrum_cs_config */
259
260static void
261spectrum_cs_release(struct pcmcia_device *link)
262{
263	struct orinoco_private *priv = link->priv;
264	unsigned long flags;
265
266	/* We're committed to taking the device away now, so mark the
267	 * hardware as unavailable */
268	priv->hw.ops->lock_irqsave(&priv->lock, &flags);
269	priv->hw_unavailable++;
270	priv->hw.ops->unlock_irqrestore(&priv->lock, &flags);
271
272	pcmcia_disable_device(link);
273	if (priv->hw.iobase)
274		ioport_unmap(priv->hw.iobase);
275}				/* spectrum_cs_release */
276
277
278static int
279spectrum_cs_suspend(struct pcmcia_device *link)
280{
281	struct orinoco_private *priv = link->priv;
282	int err = 0;
283
284	/* Mark the device as stopped, to block IO until later */
285	orinoco_down(priv);
286
287	return err;
288}
289
290static int
291spectrum_cs_resume(struct pcmcia_device *link)
292{
293	struct orinoco_private *priv = link->priv;
294	int err = orinoco_up(priv);
295
296	return err;
297}
298
299
300/********************************************************************/
301/* Module initialization					    */
302/********************************************************************/
303
304static const struct pcmcia_device_id spectrum_cs_ids[] = {
305	PCMCIA_DEVICE_MANF_CARD(0x026c, 0x0001), /* Symbol Spectrum24 LA4137 */
306	PCMCIA_DEVICE_MANF_CARD(0x0104, 0x0001), /* Socket Communications CF */
307	PCMCIA_DEVICE_PROD_ID12("Intel", "PRO/Wireless LAN PC Card", 0x816cc815, 0x6fbf459a), /* 2011B, not 2011 */
308	PCMCIA_DEVICE_NULL,
309};
310MODULE_DEVICE_TABLE(pcmcia, spectrum_cs_ids);
311
312static struct pcmcia_driver orinoco_driver = {
313	.owner		= THIS_MODULE,
314	.name		= DRIVER_NAME,
315	.probe		= spectrum_cs_probe,
316	.remove		= spectrum_cs_detach,
317	.suspend	= spectrum_cs_suspend,
318	.resume		= spectrum_cs_resume,
319	.id_table       = spectrum_cs_ids,
320};
321module_pcmcia_driver(orinoco_driver);