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linux-next/drivers/net/wireless/zd1211rw/zd_mac.h
Daniel Drake 74553aedd4 [PATCH] zd1211rw: Defer firmware load until first ifup 
While playing with the firmware a while back, I discovered a way to
access the device's entire address space before the firmware has been
loaded.

Previously we were loading the firmware early on (during probe) so that
we could read the MAC address from the EEPROM and register a netdevice.
Now that we can read the EEPROM without having firmware, we can defer
firmware loading until later while still reading the MAC address early
on.

This has the advantage that zd1211rw can now be built into the kernel --
previously if this was the case, zd1211rw would be loaded before the
filesystem is available and firmware loading would fail.

Firmware load and other device initialization operations now happen the
first time the interface is brought up.

Some architectural changes were needed: handling of the is_zd1211b flag
was moved into the zd_usb structure, MAC address handling was obviously
changed, and a preinit_hw stage was added (the order is now: init,
preinit_hw, init_hw).

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2007-07-10 14:14:56 -04:00

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/* zd_mac.h
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _ZD_MAC_H
#define _ZD_MAC_H
#include <linux/wireless.h>
#include <linux/kernel.h>
#include <linux/workqueue.h>
#include <net/ieee80211.h>
#include <net/ieee80211softmac.h>
#include "zd_chip.h"
#include "zd_netdev.h"
struct zd_ctrlset {
u8 modulation;
__le16 tx_length;
u8 control;
/* stores only the difference to tx_length on ZD1211B */
__le16 packet_length;
__le16 current_length;
u8 service;
__le16 next_frame_length;
} __attribute__((packed));
#define ZD_CS_RESERVED_SIZE 25
/* zd_crtlset field modulation */
#define ZD_CS_RATE_MASK 0x0f
#define ZD_CS_TYPE_MASK 0x10
#define ZD_CS_RATE(modulation) ((modulation) & ZD_CS_RATE_MASK)
#define ZD_CS_TYPE(modulation) ((modulation) & ZD_CS_TYPE_MASK)
#define ZD_CS_CCK 0x00
#define ZD_CS_OFDM 0x10
/* These are referred to as zd_rates */
#define ZD_CCK_RATE_1M 0x00
#define ZD_CCK_RATE_2M 0x01
#define ZD_CCK_RATE_5_5M 0x02
#define ZD_CCK_RATE_11M 0x03
/* The rates for OFDM are encoded as in the PLCP header. Use ZD_OFDM_RATE_*.
*/
/* bit 5 is preamble (when in CCK mode), or a/g selection (when in OFDM mode) */
#define ZD_CS_CCK_PREA_LONG 0x00
#define ZD_CS_CCK_PREA_SHORT 0x20
#define ZD_CS_OFDM_MODE_11G 0x00
#define ZD_CS_OFDM_MODE_11A 0x20
/* zd_ctrlset control field */
#define ZD_CS_NEED_RANDOM_BACKOFF 0x01
#define ZD_CS_MULTICAST 0x02
#define ZD_CS_FRAME_TYPE_MASK 0x0c
#define ZD_CS_DATA_FRAME 0x00
#define ZD_CS_PS_POLL_FRAME 0x04
#define ZD_CS_MANAGEMENT_FRAME 0x08
#define ZD_CS_NO_SEQUENCE_CTL_FRAME 0x0c
#define ZD_CS_WAKE_DESTINATION 0x10
#define ZD_CS_RTS 0x20
#define ZD_CS_ENCRYPT 0x40
#define ZD_CS_SELF_CTS 0x80
/* Incoming frames are prepended by a PLCP header */
#define ZD_PLCP_HEADER_SIZE 5
struct rx_length_info {
__le16 length[3];
__le16 tag;
} __attribute__((packed));
#define RX_LENGTH_INFO_TAG 0x697e
struct rx_status {
u8 signal_quality_cck;
/* rssi */
u8 signal_strength;
u8 signal_quality_ofdm;
u8 decryption_type;
u8 frame_status;
} __attribute__((packed));
/* rx_status field decryption_type */
#define ZD_RX_NO_WEP 0
#define ZD_RX_WEP64 1
#define ZD_RX_TKIP 2
#define ZD_RX_AES 4
#define ZD_RX_WEP128 5
#define ZD_RX_WEP256 6
/* rx_status field frame_status */
#define ZD_RX_FRAME_MODULATION_MASK 0x01
#define ZD_RX_CCK 0x00
#define ZD_RX_OFDM 0x01
#define ZD_RX_TIMEOUT_ERROR 0x02
#define ZD_RX_FIFO_OVERRUN_ERROR 0x04
#define ZD_RX_DECRYPTION_ERROR 0x08
#define ZD_RX_CRC32_ERROR 0x10
#define ZD_RX_NO_ADDR1_MATCH_ERROR 0x20
#define ZD_RX_CRC16_ERROR 0x40
#define ZD_RX_ERROR 0x80
struct housekeeping {
struct delayed_work link_led_work;
};
#define ZD_MAC_STATS_BUFFER_SIZE 16
struct zd_mac {
struct zd_chip chip;
spinlock_t lock;
struct net_device *netdev;
/* Unlocked reading possible */
struct iw_statistics iw_stats;
struct housekeeping housekeeping;
struct work_struct set_multicast_hash_work;
struct zd_mc_hash multicast_hash;
struct delayed_work set_rts_cts_work;
struct delayed_work set_basic_rates_work;
struct tasklet_struct rx_tasklet;
struct sk_buff_head rx_queue;
unsigned int stats_count;
u8 qual_buffer[ZD_MAC_STATS_BUFFER_SIZE];
u8 rssi_buffer[ZD_MAC_STATS_BUFFER_SIZE];
u8 regdomain;
u8 default_regdomain;
u8 requested_channel;
/* A bitpattern of cr_rates */
u16 basic_rates;
/* A zd_rate */
u8 rts_rate;
/* Short preamble (used for RTS/CTS) */
unsigned int short_preamble:1;
/* flags to indicate update in progress */
unsigned int updating_rts_rate:1;
unsigned int updating_basic_rates:1;
};
static inline struct ieee80211_device *zd_mac_to_ieee80211(struct zd_mac *mac)
{
return zd_netdev_ieee80211(mac->netdev);
}
static inline struct zd_mac *zd_netdev_mac(struct net_device *netdev)
{
return ieee80211softmac_priv(netdev);
}
static inline struct zd_mac *zd_chip_to_mac(struct zd_chip *chip)
{
return container_of(chip, struct zd_mac, chip);
}
static inline struct zd_mac *zd_usb_to_mac(struct zd_usb *usb)
{
return zd_chip_to_mac(zd_usb_to_chip(usb));
}
#define zd_mac_dev(mac) (zd_chip_dev(&(mac)->chip))
int zd_mac_init(struct zd_mac *mac,
struct net_device *netdev,
struct usb_interface *intf);
void zd_mac_clear(struct zd_mac *mac);
int zd_mac_preinit_hw(struct zd_mac *mac);
int zd_mac_init_hw(struct zd_mac *mac);
int zd_mac_open(struct net_device *netdev);
int zd_mac_stop(struct net_device *netdev);
int zd_mac_set_mac_address(struct net_device *dev, void *p);
void zd_mac_set_multicast_list(struct net_device *netdev);
int zd_mac_rx_irq(struct zd_mac *mac, const u8 *buffer, unsigned int length);
int zd_mac_set_regdomain(struct zd_mac *zd_mac, u8 regdomain);
u8 zd_mac_get_regdomain(struct zd_mac *zd_mac);
int zd_mac_request_channel(struct zd_mac *mac, u8 channel);
u8 zd_mac_get_channel(struct zd_mac *mac);
int zd_mac_set_mode(struct zd_mac *mac, u32 mode);
int zd_mac_get_mode(struct zd_mac *mac, u32 *mode);
int zd_mac_get_range(struct zd_mac *mac, struct iw_range *range);
struct iw_statistics *zd_mac_get_wireless_stats(struct net_device *ndev);
#ifdef DEBUG
void zd_dump_rx_status(const struct rx_status *status);
#else
#define zd_dump_rx_status(status)
#endif /* DEBUG */
#endif /* _ZD_MAC_H */
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