diff options
Diffstat (limited to 'drivers/net/wireless/legacy/wl3501_cs.c')
| -rw-r--r-- | drivers/net/wireless/legacy/wl3501_cs.c | 2030 |
1 files changed, 2030 insertions, 0 deletions
diff --git a/drivers/net/wireless/legacy/wl3501_cs.c b/drivers/net/wireless/legacy/wl3501_cs.c new file mode 100644 index 000000000000..7fb2f9513476 --- /dev/null +++ b/drivers/net/wireless/legacy/wl3501_cs.c @@ -0,0 +1,2030 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * WL3501 Wireless LAN PCMCIA Card Driver for Linux + * Written originally for Linux 2.0.30 by Fox Chen, mhchen@golf.ccl.itri.org.tw + * Ported to 2.2, 2.4 & 2.5 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> + * Wireless extensions in 2.4 by Gustavo Niemeyer <niemeyer@conectiva.com> + * + * References used by Fox Chen while writing the original driver for 2.0.30: + * + * 1. WL24xx packet drivers (tooasm.asm) + * 2. Access Point Firmware Interface Specification for IEEE 802.11 SUTRO + * 3. IEEE 802.11 + * 4. Linux network driver (/usr/src/linux/drivers/net) + * 5. ISA card driver - wl24.c + * 6. Linux PCMCIA skeleton driver - skeleton.c + * 7. Linux PCMCIA 3c589 network driver - 3c589_cs.c + * + * Tested with WL2400 firmware 1.2, Linux 2.0.30, and pcmcia-cs-2.9.12 + * 1. Performance: about 165 Kbytes/sec in TCP/IP with Ad-Hoc mode. + * rsh 192.168.1.3 "dd if=/dev/zero bs=1k count=1000" > /dev/null + * (Specification 2M bits/sec. is about 250 Kbytes/sec., but we must deduct + * ETHER/IP/UDP/TCP header, and acknowledgement overhead) + * + * Tested with Planet AP in 2.4.17, 184 Kbytes/s in UDP in Infrastructure mode, + * 173 Kbytes/s in TCP. + * + * Tested with Planet AP in 2.5.73-bk, 216 Kbytes/s in Infrastructure mode + * with a SMP machine (dual pentium 100), using pktgen, 432 pps (pkt_size = 60) + */ + +#include <linux/delay.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/in.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/fcntl.h> +#include <linux/if_arp.h> +#include <linux/ioport.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/wireless.h> +#include <net/cfg80211.h> + +#include <net/iw_handler.h> + +#include <pcmcia/cistpl.h> +#include <pcmcia/cisreg.h> +#include <pcmcia/ds.h> + +#include <asm/io.h> +#include <linux/uaccess.h> + +#include "wl3501.h" + +#ifndef __i386__ +#define slow_down_io() +#endif + +/* For rough constant delay */ +#define WL3501_NOPLOOP(n) { int x = 0; while (x++ < n) slow_down_io(); } + + + +#define wl3501_outb(a, b) { outb(a, b); slow_down_io(); } +#define wl3501_outb_p(a, b) { outb_p(a, b); slow_down_io(); } +#define wl3501_outsb(a, b, c) { outsb(a, b, c); slow_down_io(); } + +#define WL3501_RELEASE_TIMEOUT (25 * HZ) +#define WL3501_MAX_ADHOC_TRIES 16 + +#define WL3501_RESUME 0 +#define WL3501_SUSPEND 1 + +static int wl3501_config(struct pcmcia_device *link); +static void wl3501_release(struct pcmcia_device *link); + +static const struct { + int reg_domain; + int min, max, deflt; +} iw_channel_table[] = { + { + .reg_domain = IW_REG_DOMAIN_FCC, + .min = 1, + .max = 11, + .deflt = 1, + }, + { + .reg_domain = IW_REG_DOMAIN_DOC, + .min = 1, + .max = 11, + .deflt = 1, + }, + { + .reg_domain = IW_REG_DOMAIN_ETSI, + .min = 1, + .max = 13, + .deflt = 1, + }, + { + .reg_domain = IW_REG_DOMAIN_SPAIN, + .min = 10, + .max = 11, + .deflt = 10, + }, + { + .reg_domain = IW_REG_DOMAIN_FRANCE, + .min = 10, + .max = 13, + .deflt = 10, + }, + { + .reg_domain = IW_REG_DOMAIN_MKK, + .min = 14, + .max = 14, + .deflt = 14, + }, + { + .reg_domain = IW_REG_DOMAIN_MKK1, + .min = 1, + .max = 14, + .deflt = 1, + }, + { + .reg_domain = IW_REG_DOMAIN_ISRAEL, + .min = 3, + .max = 9, + .deflt = 9, + }, +}; + +/** + * iw_valid_channel - validate channel in regulatory domain + * @reg_domain: regulatory domain + * @channel: channel to validate + * + * Returns 0 if invalid in the specified regulatory domain, non-zero if valid. + */ +static int iw_valid_channel(int reg_domain, int channel) +{ + int i, rc = 0; + + for (i = 0; i < ARRAY_SIZE(iw_channel_table); i++) + if (reg_domain == iw_channel_table[i].reg_domain) { + rc = channel >= iw_channel_table[i].min && + channel <= iw_channel_table[i].max; + break; + } + return rc; +} + +/** + * iw_default_channel - get default channel for a regulatory domain + * @reg_domain: regulatory domain + * + * Returns the default channel for a regulatory domain + */ +static int iw_default_channel(int reg_domain) +{ + int i, rc = 1; + + for (i = 0; i < ARRAY_SIZE(iw_channel_table); i++) + if (reg_domain == iw_channel_table[i].reg_domain) { + rc = iw_channel_table[i].deflt; + break; + } + return rc; +} + +static void iw_set_mgmt_info_element(enum iw_mgmt_info_element_ids id, + struct iw_mgmt_info_element *el, + void *value, int len) +{ + el->id = id; + el->len = len; + memcpy(el->data, value, len); +} + +static void iw_copy_mgmt_info_element(struct iw_mgmt_info_element *to, + struct iw_mgmt_info_element *from) +{ + iw_set_mgmt_info_element(from->id, to, from->data, from->len); +} + +static inline void wl3501_switch_page(struct wl3501_card *this, u8 page) +{ + wl3501_outb(page, this->base_addr + WL3501_NIC_BSS); +} + +/* + * Get Ethernet MAC address. + * + * WARNING: We switch to FPAGE0 and switc back again. + * Making sure there is no other WL function beening called by ISR. + */ +static int wl3501_get_flash_mac_addr(struct wl3501_card *this) +{ + int base_addr = this->base_addr; + + /* get MAC addr */ + wl3501_outb(WL3501_BSS_FPAGE3, base_addr + WL3501_NIC_BSS); /* BSS */ + wl3501_outb(0x00, base_addr + WL3501_NIC_LMAL); /* LMAL */ + wl3501_outb(0x40, base_addr + WL3501_NIC_LMAH); /* LMAH */ + + /* wait for reading EEPROM */ + WL3501_NOPLOOP(100); + this->mac_addr[0] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->mac_addr[1] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->mac_addr[2] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->mac_addr[3] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->mac_addr[4] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->mac_addr[5] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->reg_domain = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + wl3501_outb(WL3501_BSS_FPAGE0, base_addr + WL3501_NIC_BSS); + wl3501_outb(0x04, base_addr + WL3501_NIC_LMAL); + wl3501_outb(0x40, base_addr + WL3501_NIC_LMAH); + WL3501_NOPLOOP(100); + this->version[0] = inb(base_addr + WL3501_NIC_IODPA); + WL3501_NOPLOOP(100); + this->version[1] = inb(base_addr + WL3501_NIC_IODPA); + /* switch to SRAM Page 0 (for safety) */ + wl3501_switch_page(this, WL3501_BSS_SPAGE0); + + /* The MAC addr should be 00:60:... */ + return this->mac_addr[0] == 0x00 && this->mac_addr[1] == 0x60; +} + +/** + * wl3501_set_to_wla - Move 'size' bytes from PC to card + * @this: Card + * @dest: Card addressing space + * @src: PC addressing space + * @size: Bytes to move + * + * Move 'size' bytes from PC to card. (Shouldn't be interrupted) + */ +static void wl3501_set_to_wla(struct wl3501_card *this, u16 dest, void *src, + int size) +{ + /* switch to SRAM Page 0 */ + wl3501_switch_page(this, (dest & 0x8000) ? WL3501_BSS_SPAGE1 : + WL3501_BSS_SPAGE0); + /* set LMAL and LMAH */ + wl3501_outb(dest & 0xff, this->base_addr + WL3501_NIC_LMAL); + wl3501_outb(((dest >> 8) & 0x7f), this->base_addr + WL3501_NIC_LMAH); + + /* rep out to Port A */ + wl3501_outsb(this->base_addr + WL3501_NIC_IODPA, src, size); +} + +/** + * wl3501_get_from_wla - Move 'size' bytes from card to PC + * @this: Card + * @src: Card addressing space + * @dest: PC addressing space + * @size: Bytes to move + * + * Move 'size' bytes from card to PC. (Shouldn't be interrupted) + */ +static void wl3501_get_from_wla(struct wl3501_card *this, u16 src, void *dest, + int size) +{ + /* switch to SRAM Page 0 */ + wl3501_switch_page(this, (src & 0x8000) ? WL3501_BSS_SPAGE1 : + WL3501_BSS_SPAGE0); + /* set LMAL and LMAH */ + wl3501_outb(src & 0xff, this->base_addr + WL3501_NIC_LMAL); + wl3501_outb((src >> 8) & 0x7f, this->base_addr + WL3501_NIC_LMAH); + + /* rep get from Port A */ + insb(this->base_addr + WL3501_NIC_IODPA, dest, size); +} + +/* + * Get/Allocate a free Tx Data Buffer + * + * *--------------*-----------------*----------------------------------* + * | PLCP | MAC Header | DST SRC Data ... | + * | (24 bytes) | (30 bytes) | (6) (6) (Ethernet Row Data) | + * *--------------*-----------------*----------------------------------* + * \ \- IEEE 802.11 -/ \-------------- len --------------/ + * \-struct wl3501_80211_tx_hdr--/ \-------- Ethernet Frame -------/ + * + * Return = Position in Card + */ +static u16 wl3501_get_tx_buffer(struct wl3501_card *this, u16 len) +{ + u16 next, blk_cnt = 0, zero = 0; + u16 full_len = sizeof(struct wl3501_80211_tx_hdr) + len; + u16 ret = 0; + + if (full_len > this->tx_buffer_cnt * 254) + goto out; + ret = this->tx_buffer_head; + while (full_len) { + if (full_len < 254) + full_len = 0; + else + full_len -= 254; + wl3501_get_from_wla(this, this->tx_buffer_head, &next, + sizeof(next)); + if (!full_len) + wl3501_set_to_wla(this, this->tx_buffer_head, &zero, + sizeof(zero)); + this->tx_buffer_head = next; + blk_cnt++; + /* if buffer is not enough */ + if (!next && full_len) { + this->tx_buffer_head = ret; + ret = 0; + goto out; + } + } + this->tx_buffer_cnt -= blk_cnt; +out: + return ret; +} + +/* + * Free an allocated Tx Buffer. ptr must be correct position. + */ +static void wl3501_free_tx_buffer(struct wl3501_card *this, u16 ptr) +{ + /* check if all space is not free */ + if (!this->tx_buffer_head) + this->tx_buffer_head = ptr; + else + wl3501_set_to_wla(this, this->tx_buffer_tail, + &ptr, sizeof(ptr)); + while (ptr) { + u16 next; + + this->tx_buffer_cnt++; + wl3501_get_from_wla(this, ptr, &next, sizeof(next)); + this->tx_buffer_tail = ptr; + ptr = next; + } +} + +static int wl3501_esbq_req_test(struct wl3501_card *this) +{ + u8 tmp = 0; + + wl3501_get_from_wla(this, this->esbq_req_head + 3, &tmp, sizeof(tmp)); + return tmp & 0x80; +} + +static void wl3501_esbq_req(struct wl3501_card *this, u16 *ptr) +{ + u16 tmp = 0; + + wl3501_set_to_wla(this, this->esbq_req_head, ptr, 2); + wl3501_set_to_wla(this, this->esbq_req_head + 2, &tmp, sizeof(tmp)); + this->esbq_req_head += 4; + if (this->esbq_req_head >= this->esbq_req_end) + this->esbq_req_head = this->esbq_req_start; +} + +static int wl3501_esbq_exec(struct wl3501_card *this, void *sig, int sig_size) +{ + int rc = -EIO; + + if (wl3501_esbq_req_test(this)) { + u16 ptr = wl3501_get_tx_buffer(this, sig_size); + if (ptr) { + wl3501_set_to_wla(this, ptr, sig, sig_size); + wl3501_esbq_req(this, &ptr); + rc = 0; + } + } + return rc; +} + +static int wl3501_request_mib(struct wl3501_card *this, u8 index, void *bf) +{ + struct wl3501_get_req sig = { + .sig_id = WL3501_SIG_GET_REQ, + .mib_attrib = index, + }; + unsigned long flags; + int rc = -EIO; + + spin_lock_irqsave(&this->lock, flags); + if (wl3501_esbq_req_test(this)) { + u16 ptr = wl3501_get_tx_buffer(this, sizeof(sig)); + if (ptr) { + wl3501_set_to_wla(this, ptr, &sig, sizeof(sig)); + wl3501_esbq_req(this, &ptr); + this->sig_get_confirm.mib_status = 255; + rc = 0; + } + } + spin_unlock_irqrestore(&this->lock, flags); + + return rc; +} + +static int wl3501_get_mib_value(struct wl3501_card *this, u8 index, + void *bf, int size) +{ + int rc; + + rc = wl3501_request_mib(this, index, bf); + if (rc) + return rc; + + rc = wait_event_interruptible(this->wait, + this->sig_get_confirm.mib_status != 255); + if (rc) + return rc; + + memcpy(bf, this->sig_get_confirm.mib_value, size); + return 0; +} + +static int wl3501_pwr_mgmt(struct wl3501_card *this, int suspend) +{ + struct wl3501_pwr_mgmt_req sig = { + .sig_id = WL3501_SIG_PWR_MGMT_REQ, + .pwr_save = suspend, + .wake_up = !suspend, + .receive_dtims = 10, + }; + unsigned long flags; + int rc = -EIO; + + spin_lock_irqsave(&this->lock, flags); + if (wl3501_esbq_req_test(this)) { + u16 ptr = wl3501_get_tx_buffer(this, sizeof(sig)); + if (ptr) { + wl3501_set_to_wla(this, ptr, &sig, sizeof(sig)); + wl3501_esbq_req(this, &ptr); + this->sig_pwr_mgmt_confirm.status = 255; + spin_unlock_irqrestore(&this->lock, flags); + rc = wait_event_interruptible(this->wait, + this->sig_pwr_mgmt_confirm.status != 255); + printk(KERN_INFO "%s: %s status=%d\n", __func__, + suspend ? "suspend" : "resume", + this->sig_pwr_mgmt_confirm.status); + goto out; + } + } + spin_unlock_irqrestore(&this->lock, flags); +out: + return rc; +} + +/** + * wl3501_send_pkt - Send a packet. + * @this: Card + * @data: Ethernet raw frame. (e.g. data[0] - data[5] is Dest MAC Addr, + * data[6] - data[11] is Src MAC Addr) + * @len: Packet length + * Ref: IEEE 802.11 + */ +static int wl3501_send_pkt(struct wl3501_card *this, u8 *data, u16 len) +{ + u16 bf, sig_bf, next, tmplen, pktlen; + struct wl3501_md_req sig = { + .sig_id = WL3501_SIG_MD_REQ, + }; + size_t sig_addr_len = sizeof(sig.addr); + u8 *pdata = (char *)data; + int rc = -EIO; + + if (wl3501_esbq_req_test(this)) { + sig_bf = wl3501_get_tx_buffer(this, sizeof(sig)); + rc = -ENOMEM; + if (!sig_bf) /* No free buffer available */ + goto out; + bf = wl3501_get_tx_buffer(this, len + 26 + 24); + if (!bf) { + /* No free buffer available */ + wl3501_free_tx_buffer(this, sig_bf); + goto out; + } + rc = 0; + memcpy(&sig.addr, pdata, sig_addr_len); + pktlen = len - sig_addr_len; + pdata += sig_addr_len; + sig.data = bf; + if (((*pdata) * 256 + (*(pdata + 1))) > 1500) { + u8 addr4[ETH_ALEN] = { + [0] = 0xAA, [1] = 0xAA, [2] = 0x03, [4] = 0x00, + }; + + wl3501_set_to_wla(this, bf + 2 + + offsetof(struct wl3501_tx_hdr, addr4), + addr4, sizeof(addr4)); + sig.size = pktlen + 24 + 4 + 6; + if (pktlen > (254 - sizeof(struct wl3501_tx_hdr))) { + tmplen = 254 - sizeof(struct wl3501_tx_hdr); + pktlen -= tmplen; + } else { + tmplen = pktlen; + pktlen = 0; + } + wl3501_set_to_wla(this, + bf + 2 + sizeof(struct wl3501_tx_hdr), + pdata, tmplen); + pdata += tmplen; + wl3501_get_from_wla(this, bf, &next, sizeof(next)); + bf = next; + } else { + sig.size = pktlen + 24 + 4 - 2; + pdata += 2; + pktlen -= 2; + if (pktlen > (254 - sizeof(struct wl3501_tx_hdr) + 6)) { + tmplen = 254 - sizeof(struct wl3501_tx_hdr) + 6; + pktlen -= tmplen; + } else { + tmplen = pktlen; + pktlen = 0; + } + wl3501_set_to_wla(this, bf + 2 + + offsetof(struct wl3501_tx_hdr, addr4), + pdata, tmplen); + pdata += tmplen; + wl3501_get_from_wla(this, bf, &next, sizeof(next)); + bf = next; + } + while (pktlen > 0) { + if (pktlen > 254) { + tmplen = 254; + pktlen -= 254; + } else { + tmplen = pktlen; + pktlen = 0; + } + wl3501_set_to_wla(this, bf + 2, pdata, tmplen); + pdata += tmplen; + wl3501_get_from_wla(this, bf, &next, sizeof(next)); + bf = next; + } + wl3501_set_to_wla(this, sig_bf, &sig, sizeof(sig)); + wl3501_esbq_req(this, &sig_bf); + } +out: + return rc; +} + +static int wl3501_mgmt_resync(struct wl3501_card *this) +{ + struct wl3501_resync_req sig = { + .sig_id = WL3501_SIG_RESYNC_REQ, + }; + + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static inline int wl3501_fw_bss_type(struct wl3501_card *this) +{ + return this->net_type == IW_MODE_INFRA ? WL3501_NET_TYPE_INFRA : + WL3501_NET_TYPE_ADHOC; +} + +static inline int wl3501_fw_cap_info(struct wl3501_card *this) +{ + return this->net_type == IW_MODE_INFRA ? WL3501_MGMT_CAPABILITY_ESS : + WL3501_MGMT_CAPABILITY_IBSS; +} + +static int wl3501_mgmt_scan(struct wl3501_card *this, u16 chan_time) +{ + struct wl3501_scan_req sig = { + .sig_id = WL3501_SIG_SCAN_REQ, + .scan_type = WL3501_SCAN_TYPE_ACTIVE, + .probe_delay = 0x10, + .min_chan_time = chan_time, + .max_chan_time = chan_time, + .bss_type = wl3501_fw_bss_type(this), + }; + + this->bss_cnt = this->join_sta_bss = 0; + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static int wl3501_mgmt_join(struct wl3501_card *this, u16 stas) +{ + struct wl3501_join_req sig = { + .sig_id = WL3501_SIG_JOIN_REQ, + .timeout = 10, + .req.ds_pset = { + .el = { + .id = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET, + .len = 1, + }, + .chan = this->chan, + }, + }; + + memcpy(&sig.req, &this->bss_set[stas].req, sizeof(sig.req)); + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static int wl3501_mgmt_start(struct wl3501_card *this) +{ + struct wl3501_start_req sig = { + .sig_id = WL3501_SIG_START_REQ, + .beacon_period = 400, + .dtim_period = 1, + .ds_pset = { + .el = { + .id = IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET, + .len = 1, + }, + .chan = this->chan, + }, + .bss_basic_rset = { + .el = { + .id = IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES, + .len = 2, + }, + .data_rate_labels = { + [0] = IW_MGMT_RATE_LABEL_MANDATORY | + IW_MGMT_RATE_LABEL_1MBIT, + [1] = IW_MGMT_RATE_LABEL_MANDATORY | + IW_MGMT_RATE_LABEL_2MBIT, + }, + }, + .operational_rset = { + .el = { + .id = IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES, + .len = 2, + }, + .data_rate_labels = { + [0] = IW_MGMT_RATE_LABEL_MANDATORY | + IW_MGMT_RATE_LABEL_1MBIT, + [1] = IW_MGMT_RATE_LABEL_MANDATORY | + IW_MGMT_RATE_LABEL_2MBIT, + }, + }, + .ibss_pset = { + .el = { + .id = IW_MGMT_INFO_ELEMENT_IBSS_PARAMETER_SET, + .len = 2, + }, + .atim_window = 10, + }, + .bss_type = wl3501_fw_bss_type(this), + .cap_info = wl3501_fw_cap_info(this), + }; + + iw_copy_mgmt_info_element(&sig.ssid.el, &this->essid.el); + iw_copy_mgmt_info_element(&this->keep_essid.el, &this->essid.el); + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static void wl3501_mgmt_scan_confirm(struct wl3501_card *this, u16 addr) +{ + u16 i = 0; + int matchflag = 0; + struct wl3501_scan_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + if (sig.status == WL3501_STATUS_SUCCESS) { + pr_debug("success"); + if ((this->net_type == IW_MODE_INFRA && + (sig.req.cap_info & WL3501_MGMT_CAPABILITY_ESS)) || + (this->net_type == IW_MODE_ADHOC && + (sig.req.cap_info & WL3501_MGMT_CAPABILITY_IBSS)) || + this->net_type == IW_MODE_AUTO) { + if (!this->essid.el.len) + matchflag = 1; + else if (this->essid.el.len == 3 && + !memcmp(this->essid.essid, "ANY", 3)) + matchflag = 1; + else if (this->essid.el.len != sig.req.ssid.el.len) + matchflag = 0; + else if (memcmp(this->essid.essid, sig.req.ssid.essid, + this->essid.el.len)) + matchflag = 0; + else + matchflag = 1; + if (matchflag) { + for (i = 0; i < this->bss_cnt; i++) { + if (ether_addr_equal_unaligned(this->bss_set[i].req.bssid, + sig.req.bssid)) { + matchflag = 0; + break; + } + } + } + if (matchflag && (i < 20)) { + memcpy(&this->bss_set[i].req, + &sig.req, sizeof(sig.req)); + this->bss_cnt++; + this->rssi = sig.rssi; + this->bss_set[i].rssi = sig.rssi; + } + } + } else if (sig.status == WL3501_STATUS_TIMEOUT) { + pr_debug("timeout"); + this->join_sta_bss = 0; + for (i = this->join_sta_bss; i < this->bss_cnt; i++) + if (!wl3501_mgmt_join(this, i)) + break; + this->join_sta_bss = i; + if (this->join_sta_bss == this->bss_cnt) { + if (this->net_type == IW_MODE_INFRA) + wl3501_mgmt_scan(this, 100); + else { + this->adhoc_times++; + if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES) + wl3501_mgmt_start(this); + else + wl3501_mgmt_scan(this, 100); + } + } + } +} + +/** + * wl3501_block_interrupt - Mask interrupt from SUTRO + * @this: Card + * + * Mask interrupt from SUTRO. (i.e. SUTRO cannot interrupt the HOST) + * Return: 1 if interrupt is originally enabled + */ +static int wl3501_block_interrupt(struct wl3501_card *this) +{ + u8 old = inb(this->base_addr + WL3501_NIC_GCR); + u8 new = old & (~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC | + WL3501_GCR_ENECINT)); + + wl3501_outb(new, this->base_addr + WL3501_NIC_GCR); + return old & WL3501_GCR_ENECINT; +} + +/** + * wl3501_unblock_interrupt - Enable interrupt from SUTRO + * @this: Card + * + * Enable interrupt from SUTRO. (i.e. SUTRO can interrupt the HOST) + * Return: 1 if interrupt is originally enabled + */ +static int wl3501_unblock_interrupt(struct wl3501_card *this) +{ + u8 old = inb(this->base_addr + WL3501_NIC_GCR); + u8 new = (old & ~(WL3501_GCR_ECINT | WL3501_GCR_INT2EC)) | + WL3501_GCR_ENECINT; + + wl3501_outb(new, this->base_addr + WL3501_NIC_GCR); + return old & WL3501_GCR_ENECINT; +} + +/** + * wl3501_receive - Receive data from Receive Queue. + * + * Receive data from Receive Queue. + * + * @this: card + * @bf: address of host + * @size: size of buffer. + */ +static u16 wl3501_receive(struct wl3501_card *this, u8 *bf, u16 size) +{ + u16 next_addr, next_addr1; + u8 *data = bf + 12; + + size -= 12; + wl3501_get_from_wla(this, this->start_seg + 2, + &next_addr, sizeof(next_addr)); + if (size > WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr)) { + wl3501_get_from_wla(this, + this->start_seg + + sizeof(struct wl3501_rx_hdr), data, + WL3501_BLKSZ - + sizeof(struct wl3501_rx_hdr)); + size -= WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr); + data += WL3501_BLKSZ - sizeof(struct wl3501_rx_hdr); + } else { + wl3501_get_from_wla(this, + this->start_seg + + sizeof(struct wl3501_rx_hdr), + data, size); + size = 0; + } + while (size > 0) { + if (size > WL3501_BLKSZ - 5) { + wl3501_get_from_wla(this, next_addr + 5, data, + WL3501_BLKSZ - 5); + size -= WL3501_BLKSZ - 5; + data += WL3501_BLKSZ - 5; + wl3501_get_from_wla(this, next_addr + 2, &next_addr1, + sizeof(next_addr1)); + next_addr = next_addr1; + } else { + wl3501_get_from_wla(this, next_addr + 5, data, size); + size = 0; + } + } + return 0; +} + +static void wl3501_esbq_req_free(struct wl3501_card *this) +{ + u8 tmp; + u16 addr; + + if (this->esbq_req_head == this->esbq_req_tail) + goto out; + wl3501_get_from_wla(this, this->esbq_req_tail + 3, &tmp, sizeof(tmp)); + if (!(tmp & 0x80)) + goto out; + wl3501_get_from_wla(this, this->esbq_req_tail, &addr, sizeof(addr)); + wl3501_free_tx_buffer(this, addr); + this->esbq_req_tail += 4; + if (this->esbq_req_tail >= this->esbq_req_end) + this->esbq_req_tail = this->esbq_req_start; +out: + return; +} + +static int wl3501_esbq_confirm(struct wl3501_card *this) +{ + u8 tmp; + + wl3501_get_from_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp)); + return tmp & 0x80; +} + +static void wl3501_online(struct net_device *dev) +{ + struct wl3501_card *this = netdev_priv(dev); + + printk(KERN_INFO "%s: Wireless LAN online. BSSID: %pM\n", + dev->name, this->bssid); + netif_wake_queue(dev); +} + +static void wl3501_esbq_confirm_done(struct wl3501_card *this) +{ + u8 tmp = 0; + + wl3501_set_to_wla(this, this->esbq_confirm + 3, &tmp, sizeof(tmp)); + this->esbq_confirm += 4; + if (this->esbq_confirm >= this->esbq_confirm_end) + this->esbq_confirm = this->esbq_confirm_start; +} + +static int wl3501_mgmt_auth(struct wl3501_card *this) +{ + struct wl3501_auth_req sig = { + .sig_id = WL3501_SIG_AUTH_REQ, + .type = WL3501_SYS_TYPE_OPEN, + .timeout = 1000, + }; + + pr_debug("entry"); + memcpy(sig.mac_addr, this->bssid, ETH_ALEN); + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static int wl3501_mgmt_association(struct wl3501_card *this) +{ + struct wl3501_assoc_req sig = { + .sig_id = WL3501_SIG_ASSOC_REQ, + .timeout = 1000, + .listen_interval = 5, + .cap_info = this->cap_info, + }; + + pr_debug("entry"); + memcpy(sig.mac_addr, this->bssid, ETH_ALEN); + return wl3501_esbq_exec(this, &sig, sizeof(sig)); +} + +static void wl3501_mgmt_join_confirm(struct net_device *dev, u16 addr) +{ + struct wl3501_card *this = netdev_priv(dev); + struct wl3501_join_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + if (sig.status == WL3501_STATUS_SUCCESS) { + if (this->net_type == IW_MODE_INFRA) { + if (this->join_sta_bss < this->bss_cnt) { + const int i = this->join_sta_bss; + memcpy(this->bssid, + this->bss_set[i].req.bssid, ETH_ALEN); + this->chan = this->bss_set[i].req.ds_pset.chan; + iw_copy_mgmt_info_element(&this->keep_essid.el, + &this->bss_set[i].req.ssid.el); + wl3501_mgmt_auth(this); + } + } else { + const int i = this->join_sta_bss; + + memcpy(&this->bssid, &this->bss_set[i].req.bssid, ETH_ALEN); + this->chan = this->bss_set[i].req.ds_pset.chan; + iw_copy_mgmt_info_element(&this->keep_essid.el, + &this->bss_set[i].req.ssid.el); + wl3501_online(dev); + } + } else { + int i; + this->join_sta_bss++; + for (i = this->join_sta_bss; i < this->bss_cnt; i++) + if (!wl3501_mgmt_join(this, i)) + break; + this->join_sta_bss = i; + if (this->join_sta_bss == this->bss_cnt) { + if (this->net_type == IW_MODE_INFRA) + wl3501_mgmt_scan(this, 100); + else { + this->adhoc_times++; + if (this->adhoc_times > WL3501_MAX_ADHOC_TRIES) + wl3501_mgmt_start(this); + else + wl3501_mgmt_scan(this, 100); + } + } + } +} + +static inline void wl3501_alarm_interrupt(struct net_device *dev, + struct wl3501_card *this) +{ + if (this->net_type == IW_MODE_INFRA) { + printk(KERN_INFO "Wireless LAN offline\n"); + netif_stop_queue(dev); + wl3501_mgmt_resync(this); + } +} + +static inline void wl3501_md_confirm_interrupt(struct net_device *dev, + struct wl3501_card *this, + u16 addr) +{ + struct wl3501_md_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + wl3501_free_tx_buffer(this, sig.data); + if (netif_queue_stopped(dev)) + netif_wake_queue(dev); +} + +static inline void wl3501_md_ind_interrupt(struct net_device *dev, + struct wl3501_card *this, u16 addr) +{ + struct wl3501_md_ind sig; + struct sk_buff *skb; + u8 rssi, addr4[ETH_ALEN]; + u16 pkt_len; + + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + this->start_seg = sig.data; + wl3501_get_from_wla(this, + sig.data + offsetof(struct wl3501_rx_hdr, rssi), + &rssi, sizeof(rssi)); + this->rssi = rssi <= 63 ? (rssi * 100) / 64 : 255; + + wl3501_get_from_wla(this, + sig.data + + offsetof(struct wl3501_rx_hdr, addr4), + &addr4, sizeof(addr4)); + if (!(addr4[0] == 0xAA && addr4[1] == 0xAA && + addr4[2] == 0x03 && addr4[4] == 0x00)) { + printk(KERN_INFO "Unsupported packet type!\n"); + return; + } + pkt_len = sig.size + 12 - 24 - 4 - 6; + + skb = dev_alloc_skb(pkt_len + 5); + + if (!skb) { + printk(KERN_WARNING "%s: Can't alloc a sk_buff of size %d.\n", + dev->name, pkt_len); + dev->stats.rx_dropped++; + } else { + skb->dev = dev; + skb_reserve(skb, 2); /* IP headers on 16 bytes boundaries */ + skb_copy_to_linear_data(skb, (unsigned char *)&sig.addr, + sizeof(sig.addr)); + wl3501_receive(this, skb->data, pkt_len); + skb_put(skb, pkt_len); + skb->protocol = eth_type_trans(skb, dev); + dev->stats.rx_packets++; + dev->stats.rx_bytes += skb->len; + netif_rx(skb); + } +} + +static inline void wl3501_get_confirm_interrupt(struct wl3501_card *this, + u16 addr, void *sig, int size) +{ + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &this->sig_get_confirm, + sizeof(this->sig_get_confirm)); + wake_up(&this->wait); +} + +static inline void wl3501_start_confirm_interrupt(struct net_device *dev, + struct wl3501_card *this, + u16 addr) +{ + struct wl3501_start_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + if (sig.status == WL3501_STATUS_SUCCESS) + netif_wake_queue(dev); +} + +static inline void wl3501_assoc_confirm_interrupt(struct net_device *dev, + u16 addr) +{ + struct wl3501_card *this = netdev_priv(dev); + struct wl3501_assoc_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + + if (sig.status == WL3501_STATUS_SUCCESS) + wl3501_online(dev); +} + +static inline void wl3501_auth_confirm_interrupt(struct wl3501_card *this, + u16 addr) +{ + struct wl3501_auth_confirm sig; + + pr_debug("entry"); + wl3501_get_from_wla(this, addr, &sig, sizeof(sig)); + + if (sig.status == WL3501_STATUS_SUCCESS) + wl3501_mgmt_association(this); + else + wl3501_mgmt_resync(this); +} + +static inline void wl3501_rx_interrupt(struct net_device *dev) +{ + int morepkts; + u16 addr; + u8 sig_id; + struct wl3501_card *this = netdev_priv(dev); + + pr_debug("entry"); +loop: + morepkts = 0; + if (!wl3501_esbq_confirm(this)) + goto free; + wl3501_get_from_wla(this, this->esbq_confirm, &addr, sizeof(addr)); + wl3501_get_from_wla(this, addr + 2, &sig_id, sizeof(sig_id)); + + switch (sig_id) { + case WL3501_SIG_DEAUTH_IND: + case WL3501_SIG_DISASSOC_IND: + case WL3501_SIG_ALARM: + wl3501_alarm_interrupt(dev, this); + break; + case WL3501_SIG_MD_CONFIRM: + wl3501_md_confirm_interrupt(dev, this, addr); + break; + case WL3501_SIG_MD_IND: + wl3501_md_ind_interrupt(dev, this, addr); + break; + case WL3501_SIG_GET_CONFIRM: + wl3501_get_confirm_interrupt(this, addr, + &this->sig_get_confirm, + sizeof(this->sig_get_confirm)); + break; + case WL3501_SIG_PWR_MGMT_CONFIRM: + wl3501_get_confirm_interrupt(this, addr, + &this->sig_pwr_mgmt_confirm, + sizeof(this->sig_pwr_mgmt_confirm)); + break; + case WL3501_SIG_START_CONFIRM: + wl3501_start_confirm_interrupt(dev, this, addr); + break; + case WL3501_SIG_SCAN_CONFIRM: + wl3501_mgmt_scan_confirm(this, addr); + break; + case WL3501_SIG_JOIN_CONFIRM: + wl3501_mgmt_join_confirm(dev, addr); + break; + case WL3501_SIG_ASSOC_CONFIRM: + wl3501_assoc_confirm_interrupt(dev, addr); + break; + case WL3501_SIG_AUTH_CONFIRM: + wl3501_auth_confirm_interrupt(this, addr); + break; + case WL3501_SIG_RESYNC_CONFIRM: + wl3501_mgmt_resync(this); /* FIXME: should be resync_confirm */ + break; + } + wl3501_esbq_confirm_done(this); + morepkts = 1; + /* free request if necessary */ +free: + wl3501_esbq_req_free(this); + if (morepkts) + goto loop; +} + +static inline void wl3501_ack_interrupt(struct wl3501_card *this) +{ + wl3501_outb(WL3501_GCR_ECINT, this->base_addr + WL3501_NIC_GCR); +} + +/** + * wl3501_interrupt - Hardware interrupt from card. + * @irq: Interrupt number + * @dev_id: net_device + * + * We must acknowledge the interrupt as soon as possible, and block the + * interrupt from the same card immediately to prevent re-entry. + * + * Before accessing the Control_Status_Block, we must lock SUTRO first. + * On the other hand, to prevent SUTRO from malfunctioning, we must + * unlock the SUTRO as soon as possible. + */ +static irqreturn_t wl3501_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct wl3501_card *this; + + this = netdev_priv(dev); + spin_lock(&this->lock); + wl3501_ack_interrupt(this); + wl3501_block_interrupt(this); + wl3501_rx_interrupt(dev); + wl3501_unblock_interrupt(this); + spin_unlock(&this->lock); + + return IRQ_HANDLED; +} + +static int wl3501_reset_board(struct wl3501_card *this) +{ + u8 tmp = 0; + int i, rc = 0; + + /* Coreset */ |