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

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

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