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0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * WL3501 Wireless LAN PCMCIA Card Driver for Linux
0004  * Written originally for Linux 2.0.30 by Fox Chen, mhchen@golf.ccl.itri.org.tw
0005  * Ported to 2.2, 2.4 & 2.5 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
0006  * Wireless extensions in 2.4 by Gustavo Niemeyer <niemeyer@conectiva.com>
0007  *
0008  * References used by Fox Chen while writing the original driver for 2.0.30:
0009  *
0010  *   1. WL24xx packet drivers (tooasm.asm)
0011  *   2. Access Point Firmware Interface Specification for IEEE 802.11 SUTRO
0012  *   3. IEEE 802.11
0013  *   4. Linux network driver (/usr/src/linux/drivers/net)
0014  *   5. ISA card driver - wl24.c
0015  *   6. Linux PCMCIA skeleton driver - skeleton.c
0016  *   7. Linux PCMCIA 3c589 network driver - 3c589_cs.c
0017  *
0018  * Tested with WL2400 firmware 1.2, Linux 2.0.30, and pcmcia-cs-2.9.12
0019  *   1. Performance: about 165 Kbytes/sec in TCP/IP with Ad-Hoc mode.
0020  *      rsh 192.168.1.3 "dd if=/dev/zero bs=1k count=1000" > /dev/null
0021  *      (Specification 2M bits/sec. is about 250 Kbytes/sec., but we must deduct
0022  *       ETHER/IP/UDP/TCP header, and acknowledgement overhead)
0023  *
0024  * Tested with Planet AP in 2.4.17, 184 Kbytes/s in UDP in Infrastructure mode,
0025  * 173 Kbytes/s in TCP.
0026  *
0027  * Tested with Planet AP in 2.5.73-bk, 216 Kbytes/s in Infrastructure mode
0028  * with a SMP machine (dual pentium 100), using pktgen, 432 pps (pkt_size = 60)
0029  */
0030 
0031 #include <linux/delay.h>
0032 #include <linux/types.h>
0033 #include <linux/interrupt.h>
0034 #include <linux/in.h>
0035 #include <linux/kernel.h>
0036 #include <linux/module.h>
0037 #include <linux/fcntl.h>
0038 #include <linux/if_arp.h>
0039 #include <linux/ioport.h>
0040 #include <linux/netdevice.h>
0041 #include <linux/etherdevice.h>
0042 #include <linux/skbuff.h>
0043 #include <linux/slab.h>
0044 #include <linux/string.h>
0045 #include <linux/wireless.h>
0046 #include <net/cfg80211.h>
0047 
0048 #include <net/iw_handler.h>
0049 
0050 #include <pcmcia/cistpl.h>
0051 #include <pcmcia/cisreg.h>
0052 #include <pcmcia/ds.h>
0053 
0054 #include <asm/io.h>
0055 #include <linux/uaccess.h>
0056 
0057 #include "wl3501.h"
0058 
0059 #ifndef __i386__
0060 #define slow_down_io()
0061 #endif
0062 
0063 /* For rough constant delay */
0064 #define WL3501_NOPLOOP(n) { int x = 0; while (x++ < n) slow_down_io(); }
0065 
0066 
0067 
0068 #define wl3501_outb(a, b) { outb(a, b); slow_down_io(); }
0069 #define wl3501_outb_p(a, b) { outb_p(a, b); slow_down_io(); }
0070 #define wl3501_outsb(a, b, c) { outsb(a, b, c); slow_down_io(); }
0071 
0072 #define WL3501_RELEASE_TIMEOUT (25 * HZ)
0073 #define WL3501_MAX_ADHOC_TRIES 16
0074 
0075 #define WL3501_RESUME   0
0076 #define WL3501_SUSPEND  1
0077 
0078 static int wl3501_config(struct pcmcia_device *link);
0079 static void wl3501_release(struct pcmcia_device *link);
0080 
0081 static const struct {
0082     int reg_domain;
0083     int min, max, deflt;
0084 } iw_channel_table[] = {
0085     {
0086         .reg_domain = IW_REG_DOMAIN_FCC,
0087         .min        = 1,
0088         .max        = 11,
0089         .deflt      = 1,
0090     },
0091     {
0092         .reg_domain = IW_REG_DOMAIN_DOC,
0093         .min        = 1,
0094         .max        = 11,
0095         .deflt      = 1,
0096     },
0097     {
0098         .reg_domain = IW_REG_DOMAIN_ETSI,
0099         .min        = 1,
0100         .max        = 13,
0101         .deflt      = 1,
0102     },
0103     {
0104         .reg_domain = IW_REG_DOMAIN_SPAIN,
0105         .min        = 10,
0106         .max        = 11,
0107         .deflt      = 10,
0108     },
0109     {
0110         .reg_domain = IW_REG_DOMAIN_FRANCE,
0111         .min        = 10,
0112         .max        = 13,
0113         .deflt      = 10,
0114     },
0115     {
0116         .reg_domain = IW_REG_DOMAIN_MKK,
0117         .min        = 14,
0118         .max        = 14,
0119         .deflt      = 14,
0120     },
0121     {
0122         .reg_domain = IW_REG_DOMAIN_MKK1,
0123         .min        = 1,
0124         .max        = 14,
0125         .deflt      = 1,
0126     },
0127     {
0128         .reg_domain = IW_REG_DOMAIN_ISRAEL,
0129         .min        = 3,
0130         .max        = 9,
0131         .deflt      = 9,
0132     },
0133 };
0134 
0135 /**
0136  * iw_valid_channel - validate channel in regulatory domain
0137  * @reg_domain: regulatory domain
0138  * @channel: channel to validate
0139  *
0140  * Returns 0 if invalid in the specified regulatory domain, non-zero if valid.
0141  */
0142 static int iw_valid_channel(int reg_domain, int channel)
0143 {
0144     int i, rc = 0;
0145 
0146     for (i = 0; i < ARRAY_SIZE(iw_channel_table); i++)
0147         if (reg_domain == iw_channel_table[i].reg_domain) {
0148             rc = channel >= iw_channel_table[i].min &&
0149                  channel <= iw_channel_table[i].max;
0150             break;
0151         }
0152     return rc;
0153 }
0154 
0155 /**
0156  * iw_default_channel - get default channel for a regulatory domain
0157  * @reg_domain: regulatory domain
0158  *
0159  * Returns the default channel for a regulatory domain
0160  */
0161 static int iw_default_channel(int reg_domain)
0162 {
0163     int i, rc = 1;
0164 
0165     for (i = 0; i < ARRAY_SIZE(iw_channel_table); i++)
0166         if (reg_domain == iw_channel_table[i].reg_domain) {
0167             rc = iw_channel_table[i].deflt;
0168             break;
0169         }
0170     return rc;
0171 }
0172 
0173 static void iw_set_mgmt_info_element(enum iw_mgmt_info_element_ids id,
0174                      struct iw_mgmt_info_element *el,
0175                      void *value, int len)
0176 {
0177     el->id  = id;
0178     el->len = len;
0179     memcpy(el->data, value, len);
0180 }
0181 
0182 static void iw_copy_mgmt_info_element(struct iw_mgmt_info_element *to,
0183                       struct iw_mgmt_info_element *from)
0184 {
0185     iw_set_mgmt_info_element(from->id, to, from->data, from->len);
0186 }
0187 
0188 static inline void wl3501_switch_page(struct wl3501_card *this, u8 page)
0189 {
0190     wl3501_outb(page, this->base_addr + WL3501_NIC_BSS);
0191 }
0192 
0193 /*
0194  * Get Ethernet MAC address.
0195  *
0196  * WARNING: We switch to FPAGE0 and switc back again.
0197  *          Making sure there is no other WL function beening called by ISR.
0198  */
0199 static int wl3501_get_flash_mac_addr(struct wl3501_card *this)
0200 {
0201     int base_addr = this->base_addr;
0202 
0203     /* get MAC addr */
0204     wl3501_outb(WL3501_BSS_FPAGE3, base_addr + WL3501_NIC_BSS); /* BSS */
0205     wl3501_outb(0x00, base_addr + WL3501_NIC_LMAL); /* LMAL */
0206     wl3501_outb(0x40, base_addr + WL3501_NIC_LMAH); /* LMAH */
0207 
0208     /* wait for reading EEPROM */
0209     WL3501_NOPLOOP(100);
0210     this->mac_addr[0] = inb(base_addr + WL3501_NIC_IODPA);
0211     WL3501_NOPLOOP(100);
0212     this->mac_addr[1] = inb(base_addr + WL3501_NIC_IODPA);
0213     WL3501_NOPLOOP(100);
0214     this->mac_addr[2] = inb(base_addr + WL3501_NIC_IODPA);
0215     WL3501_NOPLOOP(100);
0216     this->mac_addr[3] = inb(base_addr + WL3501_NIC_IODPA);
0217     WL3501_NOPLOOP(100);
0218     this->mac_addr[4] = inb(base_addr + WL3501_NIC_IODPA);
0219     WL3501_NOPLOOP(100);
0220     this->mac_addr[5] = inb(base_addr + WL3501_NIC_IODPA);
0221     WL3501_NOPLOOP(100);
0222     this->reg_domain = inb(base_addr + WL3501_NIC_IODPA);
0223     WL3501_NOPLOOP(100);
0224     wl3501_outb(WL3501_BSS_FPAGE0, base_addr + WL3501_NIC_BSS);
0225     wl3501_outb(0x04, base_addr + WL3501_NIC_LMAL);
0226     wl3501_outb(0x40, base_addr + WL3501_NIC_LMAH);
0227     WL3501_NOPLOOP(100);
0228     this->version[0] = inb(base_addr + WL3501_NIC_IODPA);
0229     WL3501_NOPLOOP(100);
0230     this->version[1] = inb(base_addr + WL3501_NIC_IODPA);
0231     /* switch to SRAM Page 0 (for safety) */
0232     wl3501_switch_page(this, WL3501_BSS_SPAGE0);
0233 
0234     /* The MAC addr should be 00:60:... */
0235     return this->mac_addr[0] == 0x00 && this->mac_addr[1] == 0x60;
0236 }
0237 
0238 /**
0239  * wl3501_set_to_wla - Move 'size' bytes from PC to card
0240  * @this: Card
0241  * @dest: Card addressing space
0242  * @src: PC addressing space
0243  * @size: Bytes to move
0244  *
0245  * Move 'size' bytes from PC to card. (Shouldn't be interrupted)
0246  */
0247 static void wl3501_set_to_wla(struct wl3501_card *this, u16 dest, void *src,
0248                   int size)
0249 {
0250     /* switch to SRAM Page 0 */
0251     wl3501_switch_page(this, (dest & 0x8000) ? WL3501_BSS_SPAGE1 :
0252                            WL3501_BSS_SPAGE0);
0253     /* set LMAL and LMAH */
0254     wl3501_outb(dest & 0xff, this->base_addr + WL3501_NIC_LMAL);
0255     wl3501_outb(((dest >> 8) & 0x7f), this->base_addr + WL3501_NIC_LMAH);
0256 
0257     /* rep out to Port A */
0258     wl3501_outsb(this->base_addr + WL3501_NIC_IODPA, src, size);
0259 }
0260 
0261 /**
0262  * wl3501_get_from_wla - Move 'size' bytes from card to PC
0263  * @this: Card
0264  * @src: Card addressing space
0265  * @dest: PC addressing space
0266  * @size: Bytes to move
0267  *
0268  * Move 'size' bytes from card to PC. (Shouldn't be interrupted)
0269  */
0270 static void wl3501_get_from_wla(struct wl3501_card *this, u16 src, void *dest,
0271                 int size)
0272 {
0273     /* switch to SRAM Page 0 */
0274     wl3501_switch_page(this, (src & 0x8000) ? WL3501_BSS_SPAGE1 :
0275                           WL3501_BSS_SPAGE0);
0276     /* set LMAL and LMAH */
0277     wl3501_outb(src & 0xff, this->base_addr + WL3501_NIC_LMAL);
0278     wl3501_outb((src >> 8) & 0x7f, this->base_addr + WL3501_NIC_LMAH);
0279 
0280     /* rep get from Port A */
0281     insb(this->base_addr + WL3501_NIC_IODPA, dest, size);
0282 }
0283 
0284 /*
0285  * Get/Allocate a free Tx Data Buffer
0286  *
0287  *  *--------------*-----------------*----------------------------------*
0288  *  |    PLCP      |    MAC Header   |  DST  SRC         Data ...       |
0289  *  |  (24 bytes)  |    (30 bytes)   |  (6)  (6)  (Ethernet Row Data)   |
0290  *  *--------------*-----------------*----------------------------------*
0291  *  \               \- IEEE 802.11 -/ \-------------- len --------------/
0292  *   \-struct wl3501_80211_tx_hdr--/   \-------- Ethernet Frame -------/
0293  *
0294  * Return = Position in Card
0295  */
0296 static u16 wl3501_get_tx_buffer(struct wl3501_card *this, u16 len)
0297 {
0298     u16 next, blk_cnt = 0, zero = 0;
0299     u16 full_len = sizeof(struct wl3501_80211_tx_hdr) + len;
0300     u16 ret = 0;
0301 
0302     if (full_len > this->tx_buffer_cnt * 254)
0303         goto out;
0304     ret = this->tx_buffer_head;
0305     while (full_len) {
0306         if (full_len < 254)
0307             full_len = 0;
0308         else
0309             full_len -= 254;
0310         wl3501_get_from_wla(this, this->tx_buffer_head, &next,
0311                     sizeof(next));
0312         if (!full_len)
0313             wl3501_set_to_wla(this, this->tx_buffer_head, &zero,
0314                       sizeof(zero));
0315         this->tx_buffer_head = next;
0316         blk_cnt++;
0317         /* if buffer is not enough */
0318         if (!next && full_len) {
0319             this->tx_buffer_head = ret;
0320             ret = 0;
0321             goto out;
0322         }
0323     }
0324     this->tx_buffer_cnt -= blk_cnt;
0325 out:
0326     return ret;
0327 }
0328 
0329 /*
0330  * Free an allocated Tx Buffer. ptr must be correct position.
0331  */
0332 static void wl3501_free_tx_buffer(struct wl3501_card *this, u16 ptr)
0333 {
0334     /* check if all space is not free */
0335     if (!this->tx_buffer_head)
0336         this->tx_buffer_head = ptr;
0337     else
0338         wl3501_set_to_wla(this, this->tx_buffer_tail,
0339                   &ptr, sizeof(ptr));
0340     while (ptr) {
0341         u16 next;
0342 
0343         this->tx_buffer_cnt++;
0344         wl3501_get_from_wla(this, ptr, &next, sizeof(next));
0345         this->tx_buffer_tail = ptr;
0346         ptr = next;
0347     }
0348 }
0349 
0350 static int wl3501_esbq_req_test(struct wl3501_card *this)
0351 {
0352     u8 tmp = 0;
0353 
0354     wl3501_get_from_wla(this, this->esbq_req_head + 3, &tmp, sizeof(tmp));
0355     return tmp & 0x80;
0356 }
0357 
0358 static void wl3501_esbq_req(struct wl3501_card *this, u16 *ptr)
0359 {
0360     u16 tmp = 0;
0361 
0362     wl3501_set_to_wla(this, this->esbq_req_head, ptr, 2);
0363     wl3501_set_to_wla(this, this->esbq_req_head + 2, &tmp, sizeof(tmp));
0364     this->esbq_req_head += 4;
0365     if (this->esbq_req_head >= this->esbq_req_end)
0366         this->esbq_req_head = this->esbq_req_start;
0367 }
0368 
0369 static int wl3501_esbq_exec(struct wl3501_card *this, void *sig, int sig_size)
0370 {
0371     int rc = -EIO;
0372 
0373     if (wl3501_esbq_req_test(this)) {
0374         u16 ptr = wl3501_get_tx_buffer(this, sig_size);
0375         if (ptr) {
0376             wl3501_set_to_wla(this, ptr, sig, sig_size);
0377             wl3501_esbq_req(this, &ptr);
0378             rc = 0;
0379         }
0380     }
0381     return rc;
0382 }
0383 
0384 static int wl3501_request_mib(struct wl3501_card *this, u8 index, void *bf)
0385 {
0386     struct wl3501_get_req sig = {
0387         .sig_id     = WL3501_SIG_GET_REQ,
0388         .mib_attrib = index,
0389     };
0390     unsigned long flags;
0391     int rc = -EIO;
0392 
0393     spin_lock_irqsave(&this->lock, flags);
0394     if (wl3501_esbq_req_test(this)) {
0395         u16 ptr = wl3501_get_tx_buffer(this, sizeof(sig));
0396         if (ptr) {
0397             wl3501_set_to_wla(this, ptr, &sig, sizeof(sig));
0398             wl3501_esbq_req(this, &ptr);
0399             this->sig_get_confirm.mib_status = 255;
0400             rc = 0;
0401         }
0402     }
0403     spin_unlock_irqrestore(&this->lock, flags);
0404 
0405     return rc;
0406 }
0407 
0408 static int wl3501_get_mib_value(struct wl3501_card *this, u8 index,
0409                 void *bf, int size)
0410 {
0411     int rc;
0412 
0413     rc = wl3501_request_mib(this, index, bf);
0414     if (rc)
0415         return rc;
0416 
0417     rc = wait_event_interruptible(this->wait,
0418         this->sig_get_confirm.mib_status != 255);
0419     if (rc)
0420         return rc;
0421 
0422     memcpy(bf, this->sig_get_confirm.mib_value, size);
0423     return 0;
0424 }
0425 
0426 static int wl3501_pwr_mgmt(struct wl3501_card *this, int suspend)
0427 {
0428     struct wl3501_pwr_mgmt_req sig = {
0429         .sig_id     = WL3501_SIG_PWR_MGMT_REQ,
0430         .pwr_save   = suspend,
0431         .wake_up    = !suspend,
0432         .receive_dtims  = 10,
0433     };
0434     unsigned long flags;
0435     int rc = -EIO;
0436 
0437     spin_lock_irqsave(&this->lock, flags);
0438     if (wl3501_esbq_req_test(this)) {
0439         u16 ptr = wl3501_get_tx_buffer(this, sizeof(sig));
0440         if (ptr) {
0441             wl3501_set_to_wla(this, ptr, &sig, sizeof(sig));
0442             wl3501_esbq_req(this, &ptr);
0443             this->sig_pwr_mgmt_confirm.status = 255;
0444             spin_unlock_irqrestore(&this->lock, flags);
0445             rc = wait_event_interruptible(this->wait,
0446                 this->sig_pwr_mgmt_confirm.status != 255);
0447             printk(KERN_INFO "%s: %s status=%d\n", __func__,
0448                    suspend ? "suspend" : "resume",
0449                    this->sig_pwr_mgmt_confirm.status);
0450             goto out;
0451         }
0452     }
0453     spin_unlock_irqrestore(&this->lock, flags);
0454 out:
0455     return rc;
0456 }
0457 
0458 /**
0459  * wl3501_send_pkt - Send a packet.
0460  * @this: Card
0461  * @data: Ethernet raw frame.  (e.g. data[0] - data[5] is Dest MAC Addr,
0462  *                                   data[6] - data[11] is Src MAC Addr)
0463  * @len: Packet length
0464  * Ref: IEEE 802.11
0465  */
0466 static int wl3501_send_pkt(struct wl3501_card *this, u8 *data, u16 len)
0467 {
0468     u16 bf, sig_bf, next, tmplen, pktlen;
0469     struct wl3501_md_req sig = {
0470         .sig_id = WL3501_SIG_MD_REQ,
0471     };
0472     size_t sig_addr_len = sizeof(sig.addr);
0473     u8 *pdata = (char *)data;
0474     int rc = -EIO;
0475 
0476     if (wl3501_esbq_req_test(this)) {
0477         sig_bf = wl3501_get_tx_buffer(this, sizeof(sig));
0478         rc = -ENOMEM;
0479         if (!sig_bf)    /* No free buffer available */
0480             goto out;
0481         bf = wl3501_get_tx_buffer(this, len + 26 + 24);
0482         if (!bf) {
0483             /* No free buffer available */
0484             wl3501_free_tx_buffer(this, sig_bf);
0485             goto out;
0486         }
0487         rc = 0;
0488         memcpy(&sig.addr, pdata, sig_addr_len);
0489         pktlen = len - sig_addr_len;
0490         pdata += sig_addr_len;
0491         sig.data = bf;
0492         if (((*pdata) * 256 + (*(pdata + 1))) > 1500) {
0493             u8 addr4[ETH_ALEN] = {
0494                 [0] = 0xAA, [1] = 0xAA, [2] = 0x03, [4] = 0x00,
0495             };
0496 
0497             wl3501_set_to_wla(this, bf + 2 +
0498                       offsetof(struct wl3501_tx_hdr, addr4),
0499                       addr4, sizeof(addr4));
0500             sig.size = pktlen + 24 + 4 + 6;
0501             if (pktlen > (254 - sizeof(struct wl3501_tx_hdr))) {
0502                 tmplen = 254 - sizeof(struct wl3501_tx_hdr);
0503                 pktlen -= tmplen;
0504             } else {
0505                 tmplen = pktlen;
0506                 pktlen = 0;
0507             }
0508             wl3501_set_to_wla(this,
0509                       bf + 2 + sizeof(struct wl3501_tx_hdr),
0510                       pdata, tmplen);
0511             pdata += tmplen;
0512             wl3501_get_from_wla(this, bf, &next, sizeof(next));
0513             bf = next;
0514         } else {
0515             sig.size = pktlen + 24 + 4 - 2;
0516             pdata += 2;
0517             pktlen -= 2;
0518             if (pktlen > (254 - sizeof(struct wl3501_tx_hdr) + 6)) {
0519                 tmplen = 254 - sizeof(struct wl3501_tx_hdr) + 6;
0520                 pktlen -= tmplen;
0521             } else {
0522                 tmplen = pktlen;
0523                 pktlen = 0;
0524             }
0525             wl3501_set_to_wla(this, bf + 2 +
0526                       offsetof(struct wl3501_tx_hdr, addr4),
0527                       pdata, tmplen);
0528             pdata += tmplen;
0529             wl3501_get_from_wla(this, bf, &next, sizeof(next));
0530             bf = next;
0531         }
0532         while (pktlen > 0) {
0533             if (pktlen > 254) {
0534                 tmplen = 254;
0535                 pktlen -= 254;
0536             } else {
0537                 tmplen = pktlen;
0538                 pktlen = 0;
0539             }
0540             wl3501_set_to_wla(this, bf + 2, pdata, tmplen);
0541             pdata += tmplen;
0542             wl3501_get_from_wla(this, bf, &next, sizeof(next));
0543             bf = next;
0544         }
0545         wl3501_set_to_wla(this, sig_bf, &sig, sizeof(sig));
0546         wl3501_esbq_req(this, &sig_bf);
0547     }
0548 out:
0549     return rc;
0550 }
0551 
0552 static int wl3501_mgmt_resync(struct wl3501_card *this)
0553 {
0554     struct wl3501_resync_req sig = {
0555         .sig_id = WL3501_SIG_RESYNC_REQ,
0556     };
0557 
0558     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0559 }
0560 
0561 static inline int wl3501_fw_bss_type(struct wl3501_card *this)
0562 {
0563     return this->net_type == IW_MODE_INFRA ? WL3501_NET_TYPE_INFRA :
0564                          WL3501_NET_TYPE_ADHOC;
0565 }
0566 
0567 static inline int wl3501_fw_cap_info(struct wl3501_card *this)
0568 {
0569     return this->net_type == IW_MODE_INFRA ? WL3501_MGMT_CAPABILITY_ESS :
0570                          WL3501_MGMT_CAPABILITY_IBSS;
0571 }
0572 
0573 static int wl3501_mgmt_scan(struct wl3501_card *this, u16 chan_time)
0574 {
0575     struct wl3501_scan_req sig = {
0576         .sig_id     = WL3501_SIG_SCAN_REQ,
0577         .scan_type  = WL3501_SCAN_TYPE_ACTIVE,
0578         .probe_delay    = 0x10,
0579         .min_chan_time  = chan_time,
0580         .max_chan_time  = chan_time,
0581         .bss_type   = wl3501_fw_bss_type(this),
0582     };
0583 
0584     this->bss_cnt = this->join_sta_bss = 0;
0585     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0586 }
0587 
0588 static int wl3501_mgmt_join(struct wl3501_card *this, u16 stas)
0589 {
0590     struct wl3501_join_req sig = {
0591         .sig_id       = WL3501_SIG_JOIN_REQ,
0592         .timeout      = 10,
0593         .req.ds_pset = {
0594             .el = {
0595                 .id  = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET,
0596                 .len = 1,
0597             },
0598             .chan   = this->chan,
0599         },
0600     };
0601 
0602     memcpy(&sig.req, &this->bss_set[stas].req, sizeof(sig.req));
0603     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0604 }
0605 
0606 static int wl3501_mgmt_start(struct wl3501_card *this)
0607 {
0608     struct wl3501_start_req sig = {
0609         .sig_id         = WL3501_SIG_START_REQ,
0610         .beacon_period      = 400,
0611         .dtim_period        = 1,
0612         .ds_pset = {
0613             .el = {
0614                 .id  = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET,
0615                 .len = 1,
0616             },
0617             .chan   = this->chan,
0618         },
0619         .bss_basic_rset = {
0620             .el = {
0621                 .id = IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES,
0622                 .len = 2,
0623             },
0624             .data_rate_labels = {
0625                 [0] = IW_MGMT_RATE_LABEL_MANDATORY |
0626                       IW_MGMT_RATE_LABEL_1MBIT,
0627                 [1] = IW_MGMT_RATE_LABEL_MANDATORY |
0628                       IW_MGMT_RATE_LABEL_2MBIT,
0629             },
0630         },
0631         .operational_rset   = {
0632             .el = {
0633                 .id = IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES,
0634                 .len = 2,
0635             },
0636             .data_rate_labels = {
0637                 [0] = IW_MGMT_RATE_LABEL_MANDATORY |
0638                       IW_MGMT_RATE_LABEL_1MBIT,
0639                 [1] = IW_MGMT_RATE_LABEL_MANDATORY |
0640                       IW_MGMT_RATE_LABEL_2MBIT,
0641             },
0642         },
0643         .ibss_pset      = {
0644             .el = {
0645                 .id  = IW_MGMT_INFO_ELEMENT_IBSS_PARAMETER_SET,
0646                 .len     = 2,
0647             },
0648             .atim_window = 10,
0649         },
0650         .bss_type       = wl3501_fw_bss_type(this),
0651         .cap_info       = wl3501_fw_cap_info(this),
0652     };
0653 
0654     iw_copy_mgmt_info_element(&sig.ssid.el, &this->essid.el);
0655     iw_copy_mgmt_info_element(&this->keep_essid.el, &this->essid.el);
0656     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0657 }
0658 
0659 static void wl3501_mgmt_scan_confirm(struct wl3501_card *this, u16 addr)
0660 {
0661     u16 i = 0;
0662     int matchflag = 0;
0663     struct wl3501_scan_confirm sig;
0664 
0665     pr_debug("entry");
0666     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
0667     if (sig.status == WL3501_STATUS_SUCCESS) {
0668         pr_debug("success");
0669         if ((this->net_type == IW_MODE_INFRA &&
0670              (sig.req.cap_info & WL3501_MGMT_CAPABILITY_ESS)) ||
0671             (this->net_type == IW_MODE_ADHOC &&
0672              (sig.req.cap_info & WL3501_MGMT_CAPABILITY_IBSS)) ||
0673             this->net_type == IW_MODE_AUTO) {
0674             if (!this->essid.el.len)
0675                 matchflag = 1;
0676             else if (this->essid.el.len == 3 &&
0677                  !memcmp(this->essid.essid, "ANY", 3))
0678                 matchflag = 1;
0679             else if (this->essid.el.len != sig.req.ssid.el.len)
0680                 matchflag = 0;
0681             else if (memcmp(this->essid.essid, sig.req.ssid.essid,
0682                     this->essid.el.len))
0683                 matchflag = 0;
0684             else
0685                 matchflag = 1;
0686             if (matchflag) {
0687                 for (i = 0; i < this->bss_cnt; i++) {
0688                     if (ether_addr_equal_unaligned(this->bss_set[i].req.bssid,
0689                                        sig.req.bssid)) {
0690                         matchflag = 0;
0691                         break;
0692                     }
0693                 }
0694             }
0695             if (matchflag && (i < 20)) {
0696                 memcpy(&this->bss_set[i].req,
0697                        &sig.req, sizeof(sig.req));
0698                 this->bss_cnt++;
0699                 this->rssi = sig.rssi;
0700                 this->bss_set[i].rssi = sig.rssi;
0701             }
0702         }
0703     } else if (sig.status == WL3501_STATUS_TIMEOUT) {
0704         pr_debug("timeout");
0705         this->join_sta_bss = 0;
0706         for (i = this->join_sta_bss; i < this->bss_cnt; i++)
0707             if (!wl3501_mgmt_join(this, i))
0708                 break;
0709         this->join_sta_bss = i;
0710         if (this->join_sta_bss == this->bss_cnt) {
0711             if (this->net_type == IW_MODE_INFRA)
0712                 wl3501_mgmt_scan(this, 100);
0713             else {
0714                 this->adhoc_times++;
0715                 if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES)
0716                     wl3501_mgmt_start(this);
0717                 else
0718                     wl3501_mgmt_scan(this, 100);
0719             }
0720         }
0721     }
0722 }
0723 
0724 /**
0725  * wl3501_block_interrupt - Mask interrupt from SUTRO
0726  * @this: Card
0727  *
0728  * Mask interrupt from SUTRO. (i.e. SUTRO cannot interrupt the HOST)
0729  * Return: 1 if interrupt is originally enabled
0730  */
0731 static int wl3501_block_interrupt(struct wl3501_card *this)
0732 {
0733     u8 old = inb(this->base_addr + WL3501_NIC_GCR);
0734     u8 new = old & (~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC |
0735             WL3501_GCR_ENECINT));
0736 
0737     wl3501_outb(new, this->base_addr + WL3501_NIC_GCR);
0738     return old & WL3501_GCR_ENECINT;
0739 }
0740 
0741 /**
0742  * wl3501_unblock_interrupt - Enable interrupt from SUTRO
0743  * @this: Card
0744  *
0745  * Enable interrupt from SUTRO. (i.e. SUTRO can interrupt the HOST)
0746  * Return: 1 if interrupt is originally enabled
0747  */
0748 static int wl3501_unblock_interrupt(struct wl3501_card *this)
0749 {
0750     u8 old = inb(this->base_addr + WL3501_NIC_GCR);
0751     u8 new = (old & ~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC)) |
0752           WL3501_GCR_ENECINT;
0753 
0754     wl3501_outb(new, this->base_addr + WL3501_NIC_GCR);
0755     return old & WL3501_GCR_ENECINT;
0756 }
0757 
0758 /**
0759  * wl3501_receive - Receive data from Receive Queue.
0760  *
0761  * Receive data from Receive Queue.
0762  *
0763  * @this: card
0764  * @bf: address of host
0765  * @size: size of buffer.
0766  */
0767 static u16 wl3501_receive(struct wl3501_card *this, u8 *bf, u16 size)
0768 {
0769     u16 next_addr, next_addr1;
0770     u8 *data = bf + 12;
0771 
0772     size -= 12;
0773     wl3501_get_from_wla(this, this->start_seg + 2,
0774                 &next_addr, sizeof(next_addr));
0775     if (size > WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr)) {
0776         wl3501_get_from_wla(this,
0777                     this->start_seg +
0778                     sizeof(struct wl3501_rx_hdr), data,
0779                     WL3501_BLKSZ -
0780                     sizeof(struct wl3501_rx_hdr));
0781         size -= WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr);
0782         data += WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr);
0783     } else {
0784         wl3501_get_from_wla(this,
0785                     this->start_seg +
0786                     sizeof(struct wl3501_rx_hdr),
0787                     data, size);
0788         size = 0;
0789     }
0790     while (size > 0) {
0791         if (size > WL3501_BLKSZ - 5) {
0792             wl3501_get_from_wla(this, next_addr + 5, data,
0793                         WL3501_BLKSZ - 5);
0794             size -= WL3501_BLKSZ - 5;
0795             data += WL3501_BLKSZ - 5;
0796             wl3501_get_from_wla(this, next_addr + 2, &next_addr1,
0797                         sizeof(next_addr1));
0798             next_addr = next_addr1;
0799         } else {
0800             wl3501_get_from_wla(this, next_addr + 5, data, size);
0801             size = 0;
0802         }
0803     }
0804     return 0;
0805 }
0806 
0807 static void wl3501_esbq_req_free(struct wl3501_card *this)
0808 {
0809     u8 tmp;
0810     u16 addr;
0811 
0812     if (this->esbq_req_head == this->esbq_req_tail)
0813         goto out;
0814     wl3501_get_from_wla(this, this->esbq_req_tail + 3, &tmp, sizeof(tmp));
0815     if (!(tmp & 0x80))
0816         goto out;
0817     wl3501_get_from_wla(this, this->esbq_req_tail, &addr, sizeof(addr));
0818     wl3501_free_tx_buffer(this, addr);
0819     this->esbq_req_tail += 4;
0820     if (this->esbq_req_tail >= this->esbq_req_end)
0821         this->esbq_req_tail = this->esbq_req_start;
0822 out:
0823     return;
0824 }
0825 
0826 static int wl3501_esbq_confirm(struct wl3501_card *this)
0827 {
0828     u8 tmp;
0829 
0830     wl3501_get_from_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp));
0831     return tmp & 0x80;
0832 }
0833 
0834 static void wl3501_online(struct net_device *dev)
0835 {
0836     struct wl3501_card *this = netdev_priv(dev);
0837 
0838     printk(KERN_INFO "%s: Wireless LAN online. BSSID: %pM\n",
0839            dev->name, this->bssid);
0840     netif_wake_queue(dev);
0841 }
0842 
0843 static void wl3501_esbq_confirm_done(struct wl3501_card *this)
0844 {
0845     u8 tmp = 0;
0846 
0847     wl3501_set_to_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp));
0848     this->esbq_confirm += 4;
0849     if (this->esbq_confirm >= this->esbq_confirm_end)
0850         this->esbq_confirm = this->esbq_confirm_start;
0851 }
0852 
0853 static int wl3501_mgmt_auth(struct wl3501_card *this)
0854 {
0855     struct wl3501_auth_req sig = {
0856         .sig_id  = WL3501_SIG_AUTH_REQ,
0857         .type    = WL3501_SYS_TYPE_OPEN,
0858         .timeout = 1000,
0859     };
0860 
0861     pr_debug("entry");
0862     memcpy(sig.mac_addr, this->bssid, ETH_ALEN);
0863     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0864 }
0865 
0866 static int wl3501_mgmt_association(struct wl3501_card *this)
0867 {
0868     struct wl3501_assoc_req sig = {
0869         .sig_id      = WL3501_SIG_ASSOC_REQ,
0870         .timeout     = 1000,
0871         .listen_interval = 5,
0872         .cap_info    = this->cap_info,
0873     };
0874 
0875     pr_debug("entry");
0876     memcpy(sig.mac_addr, this->bssid, ETH_ALEN);
0877     return wl3501_esbq_exec(this, &sig, sizeof(sig));
0878 }
0879 
0880 static void wl3501_mgmt_join_confirm(struct net_device *dev, u16 addr)
0881 {
0882     struct wl3501_card *this = netdev_priv(dev);
0883     struct wl3501_join_confirm sig;
0884 
0885     pr_debug("entry");
0886     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
0887     if (sig.status == WL3501_STATUS_SUCCESS) {
0888         if (this->net_type == IW_MODE_INFRA) {
0889             if (this->join_sta_bss < this->bss_cnt) {
0890                 const int i = this->join_sta_bss;
0891                 memcpy(this->bssid,
0892                        this->bss_set[i].req.bssid, ETH_ALEN);
0893                 this->chan = this->bss_set[i].req.ds_pset.chan;
0894                 iw_copy_mgmt_info_element(&this->keep_essid.el,
0895                              &this->bss_set[i].req.ssid.el);
0896                 wl3501_mgmt_auth(this);
0897             }
0898         } else {
0899             const int i = this->join_sta_bss;
0900 
0901             memcpy(&this->bssid, &this->bss_set[i].req.bssid, ETH_ALEN);
0902             this->chan = this->bss_set[i].req.ds_pset.chan;
0903             iw_copy_mgmt_info_element(&this->keep_essid.el,
0904                           &this->bss_set[i].req.ssid.el);
0905             wl3501_online(dev);
0906         }
0907     } else {
0908         int i;
0909         this->join_sta_bss++;
0910         for (i = this->join_sta_bss; i < this->bss_cnt; i++)
0911             if (!wl3501_mgmt_join(this, i))
0912                 break;
0913         this->join_sta_bss = i;
0914         if (this->join_sta_bss == this->bss_cnt) {
0915             if (this->net_type == IW_MODE_INFRA)
0916                 wl3501_mgmt_scan(this, 100);
0917             else {
0918                 this->adhoc_times++;
0919                 if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES)
0920                     wl3501_mgmt_start(this);
0921                 else
0922                     wl3501_mgmt_scan(this, 100);
0923             }
0924         }
0925     }
0926 }
0927 
0928 static inline void wl3501_alarm_interrupt(struct net_device *dev,
0929                       struct wl3501_card *this)
0930 {
0931     if (this->net_type == IW_MODE_INFRA) {
0932         printk(KERN_INFO "Wireless LAN offline\n");
0933         netif_stop_queue(dev);
0934         wl3501_mgmt_resync(this);
0935     }
0936 }
0937 
0938 static inline void wl3501_md_confirm_interrupt(struct net_device *dev,
0939                            struct wl3501_card *this,
0940                            u16 addr)
0941 {
0942     struct wl3501_md_confirm sig;
0943 
0944     pr_debug("entry");
0945     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
0946     wl3501_free_tx_buffer(this, sig.data);
0947     if (netif_queue_stopped(dev))
0948         netif_wake_queue(dev);
0949 }
0950 
0951 static inline void wl3501_md_ind_interrupt(struct net_device *dev,
0952                        struct wl3501_card *this, u16 addr)
0953 {
0954     struct wl3501_md_ind sig;
0955     struct sk_buff *skb;
0956     u8 rssi, addr4[ETH_ALEN];
0957     u16 pkt_len;
0958 
0959     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
0960     this->start_seg = sig.data;
0961     wl3501_get_from_wla(this,
0962                 sig.data + offsetof(struct wl3501_rx_hdr, rssi),
0963                 &rssi, sizeof(rssi));
0964     this->rssi = rssi <= 63 ? (rssi * 100) / 64 : 255;
0965 
0966     wl3501_get_from_wla(this,
0967                 sig.data +
0968                 offsetof(struct wl3501_rx_hdr, addr4),
0969                 &addr4, sizeof(addr4));
0970     if (!(addr4[0] == 0xAA && addr4[1] == 0xAA &&
0971           addr4[2] == 0x03 && addr4[4] == 0x00)) {
0972         printk(KERN_INFO "Unsupported packet type!\n");
0973         return;
0974     }
0975     pkt_len = sig.size + 12 - 24 - 4 - 6;
0976 
0977     skb = dev_alloc_skb(pkt_len + 5);
0978 
0979     if (!skb) {
0980         printk(KERN_WARNING "%s: Can't alloc a sk_buff of size %d.\n",
0981                dev->name, pkt_len);
0982         dev->stats.rx_dropped++;
0983     } else {
0984         skb->dev = dev;
0985         skb_reserve(skb, 2); /* IP headers on 16 bytes boundaries */
0986         skb_copy_to_linear_data(skb, (unsigned char *)&sig.addr,
0987                     sizeof(sig.addr));
0988         wl3501_receive(this, skb->data, pkt_len);
0989         skb_put(skb, pkt_len);
0990         skb->protocol   = eth_type_trans(skb, dev);
0991         dev->stats.rx_packets++;
0992         dev->stats.rx_bytes += skb->len;
0993         netif_rx(skb);
0994     }
0995 }
0996 
0997 static inline void wl3501_get_confirm_interrupt(struct wl3501_card *this,
0998                         u16 addr, void *sig, int size)
0999 {
1000     pr_debug("entry");
1001     wl3501_get_from_wla(this, addr, &this->sig_get_confirm,
1002                 sizeof(this->sig_get_confirm));
1003     wake_up(&this->wait);
1004 }
1005 
1006 static inline void wl3501_start_confirm_interrupt(struct net_device *dev,
1007                           struct wl3501_card *this,
1008                           u16 addr)
1009 {
1010     struct wl3501_start_confirm sig;
1011 
1012     pr_debug("entry");
1013     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
1014     if (sig.status == WL3501_STATUS_SUCCESS)
1015         netif_wake_queue(dev);
1016 }
1017 
1018 static inline void wl3501_assoc_confirm_interrupt(struct net_device *dev,
1019                           u16 addr)
1020 {
1021     struct wl3501_card *this = netdev_priv(dev);
1022     struct wl3501_assoc_confirm sig;
1023 
1024     pr_debug("entry");
1025     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
1026 
1027     if (sig.status == WL3501_STATUS_SUCCESS)
1028         wl3501_online(dev);
1029 }
1030 
1031 static inline void wl3501_auth_confirm_interrupt(struct wl3501_card *this,
1032                          u16 addr)
1033 {
1034     struct wl3501_auth_confirm sig;
1035 
1036     pr_debug("entry");
1037     wl3501_get_from_wla(this, addr, &sig, sizeof(sig));
1038 
1039     if (sig.status == WL3501_STATUS_SUCCESS)
1040         wl3501_mgmt_association(this);
1041     else
1042         wl3501_mgmt_resync(this);
1043 }
1044 
1045 static inline void wl3501_rx_interrupt(struct net_device *dev)
1046 {
1047     int morepkts;
1048     u16 addr;
1049     u8 sig_id;
1050     struct wl3501_card *this = netdev_priv(dev);
1051 
1052     pr_debug("entry");
1053 loop:
1054     morepkts = 0;
1055     if (!wl3501_esbq_confirm(this))
1056         goto free;
1057     wl3501_get_from_wla(this, this->esbq_confirm, &addr, sizeof(addr));
1058     wl3501_get_from_wla(this, addr + 2, &sig_id, sizeof(sig_id));
1059 
1060     switch (sig_id) {
1061     case WL3501_SIG_DEAUTH_IND:
1062     case WL3501_SIG_DISASSOC_IND:
1063     case WL3501_SIG_ALARM:
1064         wl3501_alarm_interrupt(dev, this);
1065         break;
1066     case WL3501_SIG_MD_CONFIRM:
1067         wl3501_md_confirm_interrupt(dev, this, addr);
1068         break;
1069     case WL3501_SIG_MD_IND:
1070         wl3501_md_ind_interrupt(dev, this, addr);
1071         break;
1072     case WL3501_SIG_GET_CONFIRM:
1073         wl3501_get_confirm_interrupt(this, addr,
1074                          &this->sig_get_confirm,
1075                          sizeof(this->sig_get_confirm));
1076         break;
1077     case WL3501_SIG_PWR_MGMT_CONFIRM:
1078         wl3501_get_confirm_interrupt(this, addr,
1079                          &this->sig_pwr_mgmt_confirm,
1080                         sizeof(this->sig_pwr_mgmt_confirm));
1081         break;
1082     case WL3501_SIG_START_CONFIRM:
1083         wl3501_start_confirm_interrupt(dev, this, addr);
1084         break;
1085     case WL3501_SIG_SCAN_CONFIRM:
1086         wl3501_mgmt_scan_confirm(this, addr);
1087         break;
1088     case WL3501_SIG_JOIN_CONFIRM:
1089         wl3501_mgmt_join_confirm(dev, addr);
1090         break;
1091     case WL3501_SIG_ASSOC_CONFIRM:
1092         wl3501_assoc_confirm_interrupt(dev, addr);
1093         break;
1094     case WL3501_SIG_AUTH_CONFIRM:
1095         wl3501_auth_confirm_interrupt(this, addr);
1096         break;
1097     case WL3501_SIG_RESYNC_CONFIRM:
1098         wl3501_mgmt_resync(this); /* FIXME: should be resync_confirm */
1099         break;
1100     }
1101     wl3501_esbq_confirm_done(this);
1102     morepkts = 1;
1103     /* free request if necessary */
1104 free:
1105     wl3501_esbq_req_free(this);
1106     if (morepkts)
1107         goto loop;
1108 }
1109 
1110 static inline void wl3501_ack_interrupt(struct wl3501_card *this)
1111 {
1112     wl3501_outb(WL3501_GCR_ECINT, this->base_addr + WL3501_NIC_GCR);
1113 }
1114 
1115 /**
1116  * wl3501_interrupt - Hardware interrupt from card.
1117  * @irq: Interrupt number
1118  * @dev_id: net_device
1119  *
1120  * We must acknowledge the interrupt as soon as possible, and block the
1121  * interrupt from the same card immediately to prevent re-entry.
1122  *
1123  * Before accessing the Control_Status_Block, we must lock SUTRO first.
1124  * On the other hand, to prevent SUTRO from malfunctioning, we must
1125  * unlock the SUTRO as soon as possible.
1126  */
1127 static irqreturn_t wl3501_interrupt(int irq, void *dev_id)
1128 {
1129     struct net_device *dev = dev_id;
1130     struct wl3501_card *this;
1131 
1132     this = netdev_priv(dev);
1133     spin_lock(&this->lock);
1134     wl3501_ack_interrupt(this);
1135     wl3501_block_interrupt(this);
1136     wl3501_rx_interrupt(dev);
1137     wl3501_unblock_interrupt(this);
1138     spin_unlock(&this->lock);
1139 
1140     return IRQ_HANDLED;
1141 }
1142 
1143 static int wl3501_reset_board(struct wl3501_card *this)
1144 {
1145     u8 tmp = 0;
1146     int i, rc = 0;
1147 
1148     /* Coreset */
1149     wl3501_outb_p(WL3501_GCR_CORESET, this->base_addr + WL3501_NIC_GCR);
1150     wl3501_outb_p(0, this->base_addr + WL3501_NIC_GCR);
1151     wl3501_outb_p(WL3501_GCR_CORESET, this->base_addr + WL3501_NIC_GCR);
1152 
1153     /* Reset SRAM 0x480 to zero */
1154     wl3501_set_to_wla(this, 0x480, &tmp, sizeof(tmp));
1155 
1156     /* Start up */
1157     wl3501_outb_p(0, this->base_addr + WL3501_NIC_GCR);
1158 
1159     WL3501_NOPLOOP(1024 * 50);
1160 
1161     wl3501_unblock_interrupt(this); /* acme: was commented */
1162 
1163     /* Polling Self_Test_Status */
1164     for (i = 0; i < 10000; i++) {
1165         wl3501_get_from_wla(this, 0x480, &tmp, sizeof(tmp));
1166 
1167         if (tmp == 'W') {
1168             /* firmware complete all test successfully */
1169             tmp = 'A';
1170             wl3501_set_to_wla(this, 0x480, &tmp, sizeof(tmp));
1171             goto out;
1172         }
1173         WL3501_NOPLOOP(10);
1174     }
1175     printk(KERN_WARNING "%s: failed to reset the board!\n", __func__);
1176     rc = -ENODEV;
1177 out:
1178     return rc;
1179 }
1180 
1181 static int wl3501_init_firmware(struct wl3501_card *this)
1182 {
1183     u16 ptr, next;
1184     int rc = wl3501_reset_board(this);
1185 
1186     if (rc)
1187         goto fail;
1188     this->card_name[0] = '\0';
1189     wl3501_get_from_wla(this, 0x1a00,
1190                 this->card_name, sizeof(this->card_name));
1191     this->card_name[sizeof(this->card_name) - 1] = '\0';
1192     this->firmware_date[0] = '\0';
1193     wl3501_get_from_wla(this, 0x1a40,
1194                 this->firmware_date, sizeof(this->firmware_date));
1195     this->firmware_date[sizeof(this->firmware_date) - 1] = '\0';
1196     /* Switch to SRAM Page 0 */
1197     wl3501_switch_page(this, WL3501_BSS_SPAGE0);
1198     /* Read parameter from card */
1199     wl3501_get_from_wla(this, 0x482, &this->esbq_req_start, 2);
1200     wl3501_get_from_wla(this, 0x486, &this->esbq_req_end, 2);
1201     wl3501_get_from_wla(this, 0x488, &this->esbq_confirm_start, 2);
1202     wl3501_get_from_wla(this, 0x48c, &this->esbq_confirm_end, 2);
1203     wl3501_get_from_wla(this, 0x48e, &this->tx_buffer_head, 2);
1204     wl3501_get_from_wla(this, 0x492, &this->tx_buffer_size, 2);
1205     this->esbq_req_tail = this->esbq_req_head = this->esbq_req_start;
1206     this->esbq_req_end     += this->esbq_req_start;
1207     this->esbq_confirm  = this->esbq_confirm_start;
1208     this->esbq_confirm_end += this->esbq_confirm_start;
1209     /* Initial Tx Buffer */
1210     this->tx_buffer_cnt = 1;
1211     ptr = this->tx_buffer_head;
1212     next = ptr + WL3501_BLKSZ;
1213     while ((next - this->tx_buffer_head) < this->tx_buffer_size) {
1214         this->tx_buffer_cnt++;
1215         wl3501_set_to_wla(this, ptr, &next, sizeof(next));
1216         ptr = next;
1217         next = ptr + WL3501_BLKSZ;
1218     }
1219     rc = 0;
1220     next = 0;
1221     wl3501_set_to_wla(this, ptr, &next, sizeof(next));
1222     this->tx_buffer_tail = ptr;
1223 out:
1224     return rc;
1225 fail:
1226     printk(KERN_WARNING "%s: failed!\n", __func__);
1227     goto out;
1228 }
1229 
1230 static int wl3501_close(struct net_device *dev)
1231 {
1232     struct wl3501_card *this = netdev_priv(dev);
1233     unsigned long flags;
1234     struct pcmcia_device *link;
1235     link = this->p_dev;
1236 
1237     spin_lock_irqsave(&this->lock, flags);
1238     link->open--;
1239 
1240     /* Stop wl3501_hard_start_xmit() from now on */
1241     netif_stop_queue(dev);
1242     wl3501_ack_interrupt(this);
1243 
1244     /* Mask interrupts from the SUTRO */
1245     wl3501_block_interrupt(this);
1246 
1247     printk(KERN_INFO "%s: WL3501 closed\n", dev->name);
1248     spin_unlock_irqrestore(&this->lock, flags);
1249     return 0;
1250 }
1251 
1252 /**
1253  * wl3501_reset - Reset the SUTRO.
1254  * @dev: network device
1255  *
1256  * It is almost the same as wl3501_open(). In fact, we may just wl3501_close()
1257  * and wl3501_open() again, but I wouldn't like to free_irq() when the driver
1258  * is running. It seems to be dangerous.
1259  */
1260 static int wl3501_reset(struct net_device *dev)
1261 {
1262     struct wl3501_card *this = netdev_priv(dev);
1263     int rc = -ENODEV;
1264     unsigned long flags;
1265 
1266     spin_lock_irqsave(&this->lock, flags);
1267     wl3501_block_interrupt(this);
1268 
1269     if (wl3501_init_firmware(this)) {
1270         printk(KERN_WARNING "%s: Can't initialize Firmware!\n",
1271                dev->name);
1272         /* Free IRQ, and mark IRQ as unused */
1273         free_irq(dev->irq, dev);
1274         goto out;
1275     }
1276 
1277     /*
1278      * Queue has to be started only when the Card is Started
1279      */
1280     netif_stop_queue(dev);
1281     this->adhoc_times = 0;
1282     wl3501_ack_interrupt(this);
1283     wl3501_unblock_interrupt(this);
1284     wl3501_mgmt_scan(this, 100);
1285     pr_debug("%s: device reset", dev->name);
1286     rc = 0;
1287 out:
1288     spin_unlock_irqrestore(&this->lock, flags);
1289     return rc;
1290 }
1291 
1292 static void wl3501_tx_timeout(struct net_device *dev, unsigned int txqueue)
1293 {
1294     struct net_device_stats *stats = &dev->stats;
1295     int rc;
1296 
1297     stats->tx_errors++;
1298     rc = wl3501_reset(dev);
1299     if (rc)
1300         printk(KERN_ERR "%s: Error %d resetting card on Tx timeout!\n",
1301                dev->name, rc);
1302     else {
1303         netif_trans_update(dev); /* prevent tx timeout */
1304         netif_wake_queue(dev);
1305     }
1306 }
1307 
1308 /*
1309  * Return : 0 - OK
1310  *      1 - Could not transmit (dev_queue_xmit will queue it)
1311  *      and try to sent it later
1312  */
1313 static netdev_tx_t wl3501_hard_start_xmit(struct sk_buff *skb,
1314                         struct net_device *dev)
1315 {
1316     int enabled, rc;
1317     struct wl3501_card *this = netdev_priv(dev);
1318     unsigned long flags;
1319 
1320     spin_lock_irqsave(&this->lock, flags);
1321     enabled = wl3501_block_interrupt(this);
1322     rc = wl3501_send_pkt(this, skb->data, skb->len);
1323     if (enabled)
1324         wl3501_unblock_interrupt(this);
1325     if (rc) {
1326         ++dev->stats.tx_dropped;
1327         netif_stop_queue(dev);
1328     } else {
1329         ++dev->stats.tx_packets;
1330         dev->stats.tx_bytes += skb->len;
1331         kfree_skb(skb);
1332 
1333         if (this->tx_buffer_cnt < 2)
1334             netif_stop_queue(dev);
1335     }
1336     spin_unlock_irqrestore(&this->lock, flags);
1337     return NETDEV_TX_OK;
1338 }
1339 
1340 static int wl3501_open(struct net_device *dev)
1341 {
1342     int rc = -ENODEV;
1343     struct wl3501_card *this = netdev_priv(dev);
1344     unsigned long flags;
1345     struct pcmcia_device *link;
1346     link = this->p_dev;
1347 
1348     spin_lock_irqsave(&this->lock, flags);
1349     if (!pcmcia_dev_present(link))
1350         goto out;
1351     netif_device_attach(dev);
1352     link->open++;
1353 
1354     /* Initial WL3501 firmware */
1355     pr_debug("%s: Initialize WL3501 firmware...", dev->name);
1356     if (wl3501_init_firmware(this))
1357         goto fail;
1358     /* Initial device variables */
1359     this->adhoc_times = 0;
1360     /* Acknowledge Interrupt, for cleaning last state */
1361     wl3501_ack_interrupt(this);
1362 
1363     /* Enable interrupt from card after all */
1364     wl3501_unblock_interrupt(this);
1365     wl3501_mgmt_scan(this, 100);
1366     rc = 0;
1367     pr_debug("%s: WL3501 opened", dev->name);
1368     printk(KERN_INFO "%s: Card Name: %s\n"
1369              "%s: Firmware Date: %s\n",
1370              dev->name, this->card_name,
1371              dev->name, this->firmware_date);
1372 out:
1373     spin_unlock_irqrestore(&this->lock, flags);
1374     return rc;
1375 fail:
1376     printk(KERN_WARNING "%s: Can't initialize firmware!\n", dev->name);
1377     goto out;
1378 }
1379 
1380 static struct iw_statistics *wl3501_get_wireless_stats(struct net_device *dev)
1381 {
1382     struct wl3501_card *this = netdev_priv(dev);
1383     struct iw_statistics *wstats = &this->wstats;
1384     u32 value; /* size checked: it is u32 */
1385 
1386     memset(wstats, 0, sizeof(*wstats));
1387     wstats->status = netif_running(dev);
1388     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_WEP_ICV_ERROR_COUNT,
1389                   &value, sizeof(value)))
1390         wstats->discard.code += value;
1391     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_WEP_UNDECRYPTABLE_COUNT,
1392                   &value, sizeof(value)))
1393         wstats->discard.code += value;
1394     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_WEP_EXCLUDED_COUNT,
1395                   &value, sizeof(value)))
1396         wstats->discard.code += value;
1397     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_RETRY_COUNT,
1398                   &value, sizeof(value)))
1399         wstats->discard.retries = value;
1400     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_FAILED_COUNT,
1401                   &value, sizeof(value)))
1402         wstats->discard.misc += value;
1403     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_RTS_FAILURE_COUNT,
1404                   &value, sizeof(value)))
1405         wstats->discard.misc += value;
1406     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_ACK_FAILURE_COUNT,
1407                   &value, sizeof(value)))
1408         wstats->discard.misc += value;
1409     if (!wl3501_get_mib_value(this, WL3501_MIB_ATTR_FRAME_DUPLICATE_COUNT,
1410                   &value, sizeof(value)))
1411         wstats->discard.misc += value;
1412     return wstats;
1413 }
1414 
1415 /**
1416  * wl3501_detach - deletes a driver "instance"
1417  * @link: FILL_IN
1418  *
1419  * This deletes a driver "instance". The device is de-registered with Card
1420  * Services. If it has been released, all local data structures are freed.
1421  * Otherwise, the structures will be freed when the device is released.
1422  */
1423 static void wl3501_detach(struct pcmcia_device *link)
1424 {
1425     struct net_device *dev = link->priv;
1426 
1427     /* If the device is currently configured and active, we won't actually
1428      * delete it yet.  Instead, it is marked so that when the release()
1429      * function is called, that will trigger a proper detach(). */
1430 
1431     while (link->open > 0)
1432         wl3501_close(dev);
1433 
1434     netif_device_detach(dev);
1435     wl3501_release(link);
1436 
1437     unregister_netdev(dev);
1438     free_netdev(dev);
1439 }
1440 
1441 static int wl3501_get_name(struct net_device *dev, struct iw_request_info *info,
1442                union iwreq_data *wrqu, char *extra)
1443 {
1444     strlcpy(wrqu->name, "IEEE 802.11-DS", sizeof(wrqu->name));
1445     return 0;
1446 }
1447 
1448 static int wl3501_set_freq(struct net_device *dev, struct iw_request_info *info,
1449                union iwreq_data *wrqu, char *extra)
1450 {
1451     struct wl3501_card *this = netdev_priv(dev);
1452     int channel = wrqu->freq.m;
1453     int rc = -EINVAL;
1454 
1455     if (iw_valid_channel(this->reg_domain, channel)) {
1456         this->chan = channel;
1457         rc = wl3501_reset(dev);
1458     }
1459     return rc;
1460 }
1461 
1462 static int wl3501_get_freq(struct net_device *dev, struct iw_request_info *info,
1463                union iwreq_data *wrqu, char *extra)
1464 {
1465     struct wl3501_card *this = netdev_priv(dev);
1466 
1467     wrqu->freq.m = 100000 *
1468         ieee80211_channel_to_frequency(this->chan, NL80211_BAND_2GHZ);
1469     wrqu->freq.e = 1;
1470     return 0;
1471 }
1472 
1473 static int wl3501_set_mode(struct net_device *dev, struct iw_request_info *info,
1474                union iwreq_data *wrqu, char *extra)
1475 {
1476     int rc = -EINVAL;
1477 
1478     if (wrqu->mode == IW_MODE_INFRA ||
1479         wrqu->mode == IW_MODE_ADHOC ||
1480         wrqu->mode == IW_MODE_AUTO) {
1481         struct wl3501_card *this = netdev_priv(dev);
1482 
1483         this->net_type = wrqu->mode;
1484         rc = wl3501_reset(dev);
1485     }
1486     return rc;
1487 }
1488 
1489 static int wl3501_get_mode(struct net_device *dev, struct iw_request_info *info,
1490                union iwreq_data *wrqu, char *extra)
1491 {
1492     struct wl3501_card *this = netdev_priv(dev);
1493 
1494     wrqu->mode = this->net_type;
1495     return 0;
1496 }
1497 
1498 static int wl3501_get_sens(struct net_device *dev, struct iw_request_info *info,
1499                union iwreq_data *wrqu, char *extra)
1500 {
1501     struct wl3501_card *this = netdev_priv(dev);
1502 
1503     wrqu->sens.value = this->rssi;
1504     wrqu->sens.disabled = !wrqu->sens.value;
1505     wrqu->sens.fixed = 1;
1506     return 0;
1507 }
1508 
1509 static int wl3501_get_range(struct net_device *dev,
1510                 struct iw_request_info *info,
1511                 union iwreq_data *wrqu, char *extra)
1512 {
1513     struct iw_range *range = (struct iw_range *)extra;
1514 
1515     /* Set the length (very important for backward compatibility) */
1516     wrqu->data.length = sizeof(*range);
1517 
1518     /* Set all the info we don't care or don't know about to zero */
1519     memset(range, 0, sizeof(*range));
1520 
1521     /* Set the Wireless Extension versions */
1522     range->we_version_compiled  = WIRELESS_EXT;
1523     range->we_version_source    = 1;
1524     range->throughput       = 2 * 1000 * 1000;     /* ~2 Mb/s */
1525     /* FIXME: study the code to fill in more fields... */
1526     return 0;
1527 }
1528 
1529 static int wl3501_set_wap(struct net_device *dev, struct iw_request_info *info,
1530               union iwreq_data *wrqu, char *extra)
1531 {
1532     struct wl3501_card *this = netdev_priv(dev);
1533     int rc = -EINVAL;
1534 
1535     /* FIXME: we support other ARPHRDs...*/
1536     if (wrqu->ap_addr.sa_family != ARPHRD_ETHER)
1537         goto out;
1538     if (is_broadcast_ether_addr(wrqu->ap_addr.sa_data)) {
1539         /* FIXME: rescan? */
1540     } else
1541         memcpy(this->bssid, wrqu->ap_addr.sa_data, ETH_ALEN);
1542         /* FIXME: rescan? deassoc & scan? */
1543     rc = 0;
1544 out:
1545     return rc;
1546 }
1547 
1548 static int wl3501_get_wap(struct net_device *dev, struct iw_request_info *info,
1549               union iwreq_data *wrqu, char *extra)
1550 {
1551     struct wl3501_card *this = netdev_priv(dev);
1552 
1553     wrqu->ap_addr.sa_family = ARPHRD_ETHER;
1554     memcpy(wrqu->ap_addr.sa_data, this->bssid, ETH_ALEN);
1555     return 0;
1556 }
1557 
1558 static int wl3501_set_scan(struct net_device *dev, struct iw_request_info *info,
1559                union iwreq_data *wrqu, char *extra)
1560 {
1561     /*
1562      * FIXME: trigger scanning with a reset, yes, I'm lazy
1563      */
1564     return wl3501_reset(dev);
1565 }
1566 
1567 static int wl3501_get_scan(struct net_device *dev, struct iw_request_info *info,
1568                union iwreq_data *wrqu, char *extra)
1569 {
1570     struct wl3501_card *this = netdev_priv(dev);
1571     int i;
1572     char *current_ev = extra;
1573     struct iw_event iwe;
1574 
1575     for (i = 0; i < this->bss_cnt; ++i) {
1576         iwe.cmd         = SIOCGIWAP;
1577         iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
1578         memcpy(iwe.u.ap_addr.sa_data, this->bss_set[i].req.bssid, ETH_ALEN);
1579         current_ev = iwe_stream_add_event(info, current_ev,
1580                           extra + IW_SCAN_MAX_DATA,
1581                           &iwe, IW_EV_ADDR_LEN);
1582         iwe.cmd       = SIOCGIWESSID;
1583         iwe.u.data.flags  = 1;
1584         iwe.u.data.length = this->bss_set[i].req.ssid.el.len;
1585         current_ev = iwe_stream_add_point(info, current_ev,
1586                           extra + IW_SCAN_MAX_DATA,
1587                           &iwe,
1588                           this->bss_set[i].req.ssid.essid);
1589         iwe.cmd    = SIOCGIWMODE;
1590         iwe.u.mode = this->bss_set[i].req.bss_type;
1591         current_ev = iwe_stream_add_event(info, current_ev,
1592                           extra + IW_SCAN_MAX_DATA,
1593                           &iwe, IW_EV_UINT_LEN);
1594         iwe.cmd = SIOCGIWFREQ;
1595         iwe.u.freq.m = this->bss_set[i].req.ds_pset.chan;
1596         iwe.u.freq.e = 0;
1597         current_ev = iwe_stream_add_event(info, current_ev,
1598                           extra + IW_SCAN_MAX_DATA,
1599                           &iwe, IW_EV_FREQ_LEN);
1600         iwe.cmd = SIOCGIWENCODE;
1601         if (this->bss_set[i].req.cap_info & WL3501_MGMT_CAPABILITY_PRIVACY)
1602             iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
1603         else
1604             iwe.u.data.flags = IW_ENCODE_DISABLED;
1605         iwe.u.data.length = 0;
1606         current_ev = iwe_stream_add_point(info, current_ev,
1607                           extra + IW_SCAN_MAX_DATA,
1608                           &iwe, NULL);
1609     }
1610     /* Length of data */
1611     wrqu->data.length = (current_ev - extra);
1612     wrqu->data.flags = 0; /* FIXME: set properly these flags */
1613     return 0;
1614 }
1615 
1616 static int wl3501_set_essid(struct net_device *dev,
1617                 struct iw_request_info *info,
1618                 union iwreq_data *wrqu, char *extra)
1619 {
1620     struct wl3501_card *this = netdev_priv(dev);
1621 
1622     if (wrqu->data.flags) {
1623         iw_set_mgmt_info_element(IW_MGMT_INFO_ELEMENT_SSID,
1624                      &this->essid.el,
1625                      extra, wrqu->data.length);
1626     } else { /* We accept any ESSID */
1627         iw_set_mgmt_info_element(IW_MGMT_INFO_ELEMENT_SSID,
1628                      &this->essid.el, "ANY", 3);
1629     }
1630     return wl3501_reset(dev);
1631 }
1632 
1633 static int wl3501_get_essid(struct net_device *dev,
1634                 struct iw_request_info *info,
1635                 union iwreq_data *wrqu, char *extra)
1636 {
1637     struct wl3501_card *this = netdev_priv(dev);
1638     unsigned long flags;
1639 
1640     spin_lock_irqsave(&this->lock, flags);
1641     wrqu->essid.flags  = 1;
1642     wrqu->essid.length = this->essid.el.len;
1643     memcpy(extra, this->essid.essid, this->essid.el.len);
1644     spin_unlock_irqrestore(&this->lock, flags);
1645     return 0;
1646 }
1647 
1648 static int wl3501_set_nick(struct net_device *dev, struct iw_request_info *info,
1649                union iwreq_data *wrqu, char *extra)
1650 {
1651     struct wl3501_card *this = netdev_priv(dev);
1652 
1653     if (wrqu->data.length > sizeof(this->nick))
1654         return -E2BIG;
1655     strlcpy(this->nick, extra, wrqu->data.length);
1656     return 0;
1657 }
1658 
1659 static int wl3501_get_nick(struct net_device *dev, struct iw_request_info *info,
1660                union iwreq_data *wrqu, char *extra)
1661 {
1662     struct wl3501_card *this = netdev_priv(dev);
1663 
1664     strlcpy(extra, this->nick, 32);
1665     wrqu->data.length = strlen(extra);
1666     return 0;
1667 }
1668 
1669 static int wl3501_get_rate(struct net_device *dev, struct iw_request_info *info,
1670                union iwreq_data *wrqu, char *extra)
1671 {
1672     /*
1673      * FIXME: have to see from where to get this info, perhaps this card
1674      * works at 1 Mbit/s too... for now leave at 2 Mbit/s that is the most
1675      * common with the Planet Access Points. -acme
1676      */
1677     wrqu->bitrate.value = 2000000;
1678     wrqu->bitrate.fixed = 1;
1679     return 0;
1680 }
1681 
1682 static int wl3501_get_rts_threshold(struct net_device *dev,
1683                     struct iw_request_info *info,
1684                     union iwreq_data *wrqu, char *extra)
1685 {
1686     u16 threshold; /* size checked: it is u16 */
1687     struct wl3501_card *this = netdev_priv(dev);
1688     int rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_RTS_THRESHOLD,
1689                       &threshold, sizeof(threshold));
1690     if (!rc) {
1691         wrqu->rts.value = threshold;
1692         wrqu->rts.disabled = threshold >= 2347;
1693         wrqu->rts.fixed = 1;
1694     }
1695     return rc;
1696 }
1697 
1698 static int wl3501_get_frag_threshold(struct net_device *dev,
1699                      struct iw_request_info *info,
1700                      union iwreq_data *wrqu, char *extra)
1701 {
1702     u16 threshold; /* size checked: it is u16 */
1703     struct wl3501_card *this = netdev_priv(dev);
1704     int rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_FRAG_THRESHOLD,
1705                       &threshold, sizeof(threshold));
1706     if (!rc) {
1707         wrqu->frag.value = threshold;
1708         wrqu->frag.disabled = threshold >= 2346;
1709         wrqu->frag.fixed = 1;
1710     }
1711     return rc;
1712 }
1713 
1714 static int wl3501_get_txpow(struct net_device *dev,
1715                 struct iw_request_info *info,
1716                 union iwreq_data *wrqu, char *extra)
1717 {
1718     u16 txpow;
1719     struct wl3501_card *this = netdev_priv(dev);
1720     int rc = wl3501_get_mib_value(this,
1721                       WL3501_MIB_ATTR_CURRENT_TX_PWR_LEVEL,
1722                       &txpow, sizeof(txpow));
1723     if (!rc) {
1724         wrqu->txpower.value = txpow;
1725         wrqu->txpower.disabled = 0;
1726         /*
1727          * From the MIB values I think this can be configurable,
1728          * as it lists several tx power levels -acme
1729          */
1730         wrqu->txpower.fixed = 0;
1731         wrqu->txpower.flags = IW_TXPOW_MWATT;
1732     }
1733     return rc;
1734 }
1735 
1736 static int wl3501_get_retry(struct net_device *dev,
1737                 struct iw_request_info *info,
1738                 union iwreq_data *wrqu, char *extra)
1739 {
1740     u8 retry; /* size checked: it is u8 */
1741     struct wl3501_card *this = netdev_priv(dev);
1742     int rc = wl3501_get_mib_value(this,
1743                       WL3501_MIB_ATTR_LONG_RETRY_LIMIT,
1744                       &retry, sizeof(retry));
1745     if (rc)
1746         goto out;
1747     if (wrqu->retry.flags & IW_RETRY_LONG) {
1748         wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
1749         goto set_value;
1750     }
1751     rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_SHORT_RETRY_LIMIT,
1752                   &retry, sizeof(retry));
1753     if (rc)
1754         goto out;
1755     wrqu->retry.flags = IW_RETRY_LIMIT | IW_RETRY_SHORT;
1756 set_value:
1757     wrqu->retry.value = retry;
1758     wrqu->retry.disabled = 0;
1759 out:
1760     return rc;
1761 }
1762 
1763 static int wl3501_get_encode(struct net_device *dev,
1764                  struct iw_request_info *info,
1765                  union iwreq_data *wrqu, char *extra)
1766 {
1767     u8 implemented, restricted, keys[100], len_keys, tocopy;
1768     struct wl3501_card *this = netdev_priv(dev);
1769     int rc = wl3501_get_mib_value(this,
1770                       WL3501_MIB_ATTR_PRIV_OPT_IMPLEMENTED,
1771                       &implemented, sizeof(implemented));
1772     if (rc)
1773         goto out;
1774     if (!implemented) {
1775         wrqu->encoding.flags = IW_ENCODE_DISABLED;
1776         goto out;
1777     }
1778     rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_EXCLUDE_UNENCRYPTED,
1779                   &restricted, sizeof(restricted));
1780     if (rc)
1781         goto out;
1782     wrqu->encoding.flags = restricted ? IW_ENCODE_RESTRICTED :
1783                         IW_ENCODE_OPEN;
1784     rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_WEP_KEY_MAPPINGS_LEN,
1785                   &len_keys, sizeof(len_keys));
1786     if (rc)
1787         goto out;
1788     rc = wl3501_get_mib_value(this, WL3501_MIB_ATTR_WEP_KEY_MAPPINGS,
1789                   keys, len_keys);
1790     if (rc)
1791         goto out;
1792     tocopy = min_t(u16, len_keys, wrqu->encoding.length);
1793     tocopy = min_t(u8, tocopy, 100);
1794     wrqu->encoding.length = tocopy;
1795     memcpy(extra, keys, tocopy);
1796 out:
1797     return rc;
1798 }
1799 
1800 static int wl3501_get_power(struct net_device *dev,
1801                 struct iw_request_info *info,
1802                 union iwreq_data *wrqu, char *extra)
1803 {
1804     u8 pwr_state;
1805     struct wl3501_card *this = netdev_priv(dev);
1806     int rc = wl3501_get_mib_value(this,
1807                       WL3501_MIB_ATTR_CURRENT_PWR_STATE,
1808                       &pwr_state, sizeof(pwr_state));
1809     if (rc)
1810         goto out;
1811     wrqu->power.disabled = !pwr_state;
1812     wrqu->power.flags = IW_POWER_ON;
1813 out:
1814     return rc;
1815 }
1816 
1817 static const iw_handler wl3501_handler[] = {
1818     IW_HANDLER(SIOCGIWNAME, wl3501_get_name),
1819     IW_HANDLER(SIOCSIWFREQ, wl3501_set_freq),
1820     IW_HANDLER(SIOCGIWFREQ, wl3501_get_freq),
1821     IW_HANDLER(SIOCSIWMODE, wl3501_set_mode),
1822     IW_HANDLER(SIOCGIWMODE, wl3501_get_mode),
1823     IW_HANDLER(SIOCGIWSENS, wl3501_get_sens),
1824     IW_HANDLER(SIOCGIWRANGE, wl3501_get_range),
1825     IW_HANDLER(SIOCSIWSPY, iw_handler_set_spy),
1826     IW_HANDLER(SIOCGIWSPY, iw_handler_get_spy),
1827     IW_HANDLER(SIOCSIWTHRSPY, iw_handler_set_thrspy),
1828     IW_HANDLER(SIOCGIWTHRSPY, iw_handler_get_thrspy),
1829     IW_HANDLER(SIOCSIWAP, wl3501_set_wap),
1830     IW_HANDLER(SIOCGIWAP, wl3501_get_wap),
1831     IW_HANDLER(SIOCSIWSCAN, wl3501_set_scan),
1832     IW_HANDLER(SIOCGIWSCAN, wl3501_get_scan),
1833     IW_HANDLER(SIOCSIWESSID, wl3501_set_essid),
1834     IW_HANDLER(SIOCGIWESSID, wl3501_get_essid),
1835     IW_HANDLER(SIOCSIWNICKN, wl3501_set_nick),
1836     IW_HANDLER(SIOCGIWNICKN, wl3501_get_nick),
1837     IW_HANDLER(SIOCGIWRATE, wl3501_get_rate),
1838     IW_HANDLER(SIOCGIWRTS, wl3501_get_rts_threshold),
1839     IW_HANDLER(SIOCGIWFRAG, wl3501_get_frag_threshold),
1840     IW_HANDLER(SIOCGIWTXPOW, wl3501_get_txpow),
1841     IW_HANDLER(SIOCGIWRETRY, wl3501_get_retry),
1842     IW_HANDLER(SIOCGIWENCODE, wl3501_get_encode),
1843     IW_HANDLER(SIOCGIWPOWER, wl3501_get_power),
1844 };
1845 
1846 static const struct iw_handler_def wl3501_handler_def = {
1847     .num_standard   = ARRAY_SIZE(wl3501_handler),
1848     .standard   = (iw_handler *)wl3501_handler,
1849     .get_wireless_stats = wl3501_get_wireless_stats,
1850 };
1851 
1852 static const struct net_device_ops wl3501_netdev_ops = {
1853     .ndo_open       = wl3501_open,
1854     .ndo_stop       = wl3501_close,
1855     .ndo_start_xmit     = wl3501_hard_start_xmit,
1856     .ndo_tx_timeout     = wl3501_tx_timeout,
1857     .ndo_set_mac_address    = eth_mac_addr,
1858     .ndo_validate_addr  = eth_validate_addr,
1859 };
1860 
1861 static int wl3501_probe(struct pcmcia_device *p_dev)
1862 {
1863     struct net_device *dev;
1864     struct wl3501_card *this;
1865 
1866     /* The io structure describes IO port mapping */
1867     p_dev->resource[0]->end = 16;
1868     p_dev->resource[0]->flags   = IO_DATA_PATH_WIDTH_8;
1869 
1870     /* General socket configuration */
1871     p_dev->config_flags = CONF_ENABLE_IRQ;
1872     p_dev->config_index = 1;
1873 
1874     dev = alloc_etherdev(sizeof(struct wl3501_card));
1875     if (!dev)
1876         goto out_link;
1877 
1878 
1879     dev->netdev_ops     = &wl3501_netdev_ops;
1880     dev->watchdog_timeo = 5 * HZ;
1881 
1882     this = netdev_priv(dev);
1883     this->wireless_data.spy_data = &this->spy_data;
1884     this->p_dev = p_dev;
1885     dev->wireless_data  = &this->wireless_data;
1886     dev->wireless_handlers  = &wl3501_handler_def;
1887     netif_stop_queue(dev);
1888     p_dev->priv = dev;
1889 
1890     return wl3501_config(p_dev);
1891 out_link:
1892     return -ENOMEM;
1893 }
1894 
1895 static int wl3501_config(struct pcmcia_device *link)
1896 {
1897     struct net_device *dev = link->priv;
1898     int i = 0, j, ret;
1899     struct wl3501_card *this;
1900 
1901     /* Try allocating IO ports.  This tries a few fixed addresses.  If you
1902      * want, you can also read the card's config table to pick addresses --
1903      * see the serial driver for an example. */
1904     link->io_lines = 5;
1905 
1906     for (j = 0x280; j < 0x400; j += 0x20) {
1907         /* The '^0x300' is so that we probe 0x300-0x3ff first, then
1908          * 0x200-0x2ff, and so on, because this seems safer */
1909         link->resource[0]->start = j;
1910         link->resource[1]->start = link->resource[0]->start + 0x10;
1911         i = pcmcia_request_io(link);
1912         if (i == 0)
1913             break;
1914     }
1915     if (i != 0)
1916         goto failed;
1917 
1918     /* Now allocate an interrupt line. Note that this does not actually
1919      * assign a handler to the interrupt. */
1920 
1921     ret = pcmcia_request_irq(link, wl3501_interrupt);
1922     if (ret)
1923         goto failed;
1924 
1925     ret = pcmcia_enable_device(link);
1926     if (ret)
1927         goto failed;
1928 
1929     dev->irq = link->irq;
1930     dev->base_addr = link->resource[0]->start;
1931     SET_NETDEV_DEV(dev, &link->dev);
1932     if (register_netdev(dev)) {
1933         printk(KERN_NOTICE "wl3501_cs: register_netdev() failed\n");
1934         goto failed;
1935     }
1936 
1937     this = netdev_priv(dev);
1938 
1939     this->base_addr = dev->base_addr;
1940 
1941     if (!wl3501_get_flash_mac_addr(this)) {
1942         printk(KERN_WARNING "%s: Can't read MAC addr in flash ROM?\n",
1943                dev->name);
1944         unregister_netdev(dev);
1945         goto failed;
1946     }
1947 
1948     eth_hw_addr_set(dev, this->mac_addr);
1949 
1950     /* print probe information */
1951     printk(KERN_INFO "%s: wl3501 @ 0x%3.3x, IRQ %d, "
1952            "MAC addr in flash ROM:%pM\n",
1953            dev->name, this->base_addr, (int)dev->irq,
1954            dev->dev_addr);
1955     /*
1956      * Initialize card parameters - added by jss
1957      */
1958     this->net_type      = IW_MODE_INFRA;
1959     this->bss_cnt       = 0;
1960     this->join_sta_bss  = 0;
1961     this->adhoc_times   = 0;
1962     iw_set_mgmt_info_element(IW_MGMT_INFO_ELEMENT_SSID, &this->essid.el,
1963                  "ANY", 3);
1964     this->card_name[0]  = '\0';
1965     this->firmware_date[0]  = '\0';
1966     this->rssi      = 255;
1967     this->chan      = iw_default_channel(this->reg_domain);
1968     strlcpy(this->nick, "Planet WL3501", sizeof(this->nick));
1969     spin_lock_init(&this->lock);
1970     init_waitqueue_head(&this->wait);
1971     netif_start_queue(dev);
1972     return 0;
1973 
1974 failed:
1975     wl3501_release(link);
1976     return -ENODEV;
1977 }
1978 
1979 static void wl3501_release(struct pcmcia_device *link)
1980 {
1981     pcmcia_disable_device(link);
1982 }
1983 
1984 static int wl3501_suspend(struct pcmcia_device *link)
1985 {
1986     struct net_device *dev = link->priv;
1987 
1988     wl3501_pwr_mgmt(netdev_priv(dev), WL3501_SUSPEND);
1989     if (link->open)
1990         netif_device_detach(dev);
1991 
1992     return 0;
1993 }
1994 
1995 static int wl3501_resume(struct pcmcia_device *link)
1996 {
1997     struct net_device *dev = link->priv;
1998 
1999     wl3501_pwr_mgmt(netdev_priv(dev), WL3501_RESUME);
2000     if (link->open) {
2001         wl3501_reset(dev);
2002         netif_device_attach(dev);
2003     }
2004 
2005     return 0;
2006 }
2007 
2008 
2009 static const struct pcmcia_device_id wl3501_ids[] = {
2010     PCMCIA_DEVICE_MANF_CARD(0xd601, 0x0001),
2011     PCMCIA_DEVICE_NULL
2012 };
2013 MODULE_DEVICE_TABLE(pcmcia, wl3501_ids);
2014 
2015 static struct pcmcia_driver wl3501_driver = {
2016     .owner      = THIS_MODULE,
2017     .name       = "wl3501_cs",
2018     .probe      = wl3501_probe,
2019     .remove     = wl3501_detach,
2020     .id_table   = wl3501_ids,
2021     .suspend    = wl3501_suspend,
2022     .resume     = wl3501_resume,
2023 };
2024 module_pcmcia_driver(wl3501_driver);
2025 
2026 MODULE_AUTHOR("Fox Chen <mhchen@golf.ccl.itri.org.tw>, "
2027           "Arnaldo Carvalho de Melo <acme@conectiva.com.br>,"
2028           "Gustavo Niemeyer <niemeyer@conectiva.com>");
2029 MODULE_DESCRIPTION("Planet wl3501 wireless driver");
2030 MODULE_LICENSE("GPL");
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