diff options
Diffstat (limited to 'drivers/net/wireless/zd1211rw')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_chip.c | 4 | ||||
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_chip.h | 18 | ||||
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_mac.c | 202 | ||||
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_mac.h | 25 | ||||
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_usb.c | 11 |
6 files changed, 235 insertions, 27 deletions
diff --git a/drivers/net/wireless/zd1211rw/Kconfig b/drivers/net/wireless/zd1211rw/Kconfig index 74b31ea..5f80969 100644 --- a/drivers/net/wireless/zd1211rw/Kconfig +++ b/drivers/net/wireless/zd1211rw/Kconfig @@ -1,6 +1,6 @@ config ZD1211RW tristate "ZyDAS ZD1211/ZD1211B USB-wireless support" - depends on USB && MAC80211 && WLAN_80211 && EXPERIMENTAL + depends on USB && MAC80211 && EXPERIMENTAL select FW_LOADER ---help--- This is an experimental driver for the ZyDAS ZD1211/ZD1211B wireless diff --git a/drivers/net/wireless/zd1211rw/zd_chip.c b/drivers/net/wireless/zd1211rw/zd_chip.c index 4e79a98..dfa1b9bc 100644 --- a/drivers/net/wireless/zd1211rw/zd_chip.c +++ b/drivers/net/wireless/zd1211rw/zd_chip.c @@ -755,7 +755,7 @@ static int hw_reset_phy(struct zd_chip *chip) static int zd1211_hw_init_hmac(struct zd_chip *chip) { static const struct zd_ioreq32 ioreqs[] = { - { CR_ZD1211_RETRY_MAX, 0x2 }, + { CR_ZD1211_RETRY_MAX, ZD1211_RETRY_COUNT }, { CR_RX_THRESHOLD, 0x000c0640 }, }; @@ -767,7 +767,7 @@ static int zd1211_hw_init_hmac(struct zd_chip *chip) static int zd1211b_hw_init_hmac(struct zd_chip *chip) { static const struct zd_ioreq32 ioreqs[] = { - { CR_ZD1211B_RETRY_MAX, 0x02020202 }, + { CR_ZD1211B_RETRY_MAX, ZD1211B_RETRY_COUNT }, { CR_ZD1211B_CWIN_MAX_MIN_AC0, 0x007f003f }, { CR_ZD1211B_CWIN_MAX_MIN_AC1, 0x007f003f }, { CR_ZD1211B_CWIN_MAX_MIN_AC2, 0x003f001f }, diff --git a/drivers/net/wireless/zd1211rw/zd_chip.h b/drivers/net/wireless/zd1211rw/zd_chip.h index 678c139..9fd8f35 100644 --- a/drivers/net/wireless/zd1211rw/zd_chip.h +++ b/drivers/net/wireless/zd1211rw/zd_chip.h @@ -642,13 +642,29 @@ enum { #define CR_ZD1211B_TXOP CTL_REG(0x0b20) #define CR_ZD1211B_RETRY_MAX CTL_REG(0x0b28) +/* Value for CR_ZD1211_RETRY_MAX & CR_ZD1211B_RETRY_MAX. Vendor driver uses 2, + * we use 0. The first rate is tried (count+2), then all next rates are tried + * twice, until 1 Mbits is tried. */ +#define ZD1211_RETRY_COUNT 0 +#define ZD1211B_RETRY_COUNT \ + (ZD1211_RETRY_COUNT << 0)| \ + (ZD1211_RETRY_COUNT << 8)| \ + (ZD1211_RETRY_COUNT << 16)| \ + (ZD1211_RETRY_COUNT << 24) + /* Used to detect PLL lock */ #define UW2453_INTR_REG ((zd_addr_t)0x85c1) #define CWIN_SIZE 0x007f043f -#define HWINT_ENABLED 0x004f0000 +#define HWINT_ENABLED \ + (INT_TX_COMPLETE_EN| \ + INT_RX_COMPLETE_EN| \ + INT_RETRY_FAIL_EN| \ + INT_WAKEUP_EN| \ + INT_CFG_NEXT_BCN_EN) + #define HWINT_DISABLED 0 #define E2P_PWR_INT_GUARD 8 diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c index 6d66635..8a24373 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.c +++ b/drivers/net/wireless/zd1211rw/zd_mac.c @@ -88,6 +88,34 @@ static const struct ieee80211_rate zd_rates[] = { .flags = 0 }, }; +/* + * Zydas retry rates table. Each line is listed in the same order as + * in zd_rates[] and contains all the rate used when a packet is sent + * starting with a given rates. Let's consider an example : + * + * "11 Mbits : 4, 3, 2, 1, 0" means : + * - packet is sent using 4 different rates + * - 1st rate is index 3 (ie 11 Mbits) + * - 2nd rate is index 2 (ie 5.5 Mbits) + * - 3rd rate is index 1 (ie 2 Mbits) + * - 4th rate is index 0 (ie 1 Mbits) + */ + +static const struct tx_retry_rate zd_retry_rates[] = { + { /* 1 Mbits */ 1, { 0 }}, + { /* 2 Mbits */ 2, { 1, 0 }}, + { /* 5.5 Mbits */ 3, { 2, 1, 0 }}, + { /* 11 Mbits */ 4, { 3, 2, 1, 0 }}, + { /* 6 Mbits */ 5, { 4, 3, 2, 1, 0 }}, + { /* 9 Mbits */ 6, { 5, 4, 3, 2, 1, 0}}, + { /* 12 Mbits */ 5, { 6, 3, 2, 1, 0 }}, + { /* 18 Mbits */ 6, { 7, 6, 3, 2, 1, 0 }}, + { /* 24 Mbits */ 6, { 8, 6, 3, 2, 1, 0 }}, + { /* 36 Mbits */ 7, { 9, 8, 6, 3, 2, 1, 0 }}, + { /* 48 Mbits */ 8, {10, 9, 8, 6, 3, 2, 1, 0 }}, + { /* 54 Mbits */ 9, {11, 10, 9, 8, 6, 3, 2, 1, 0 }} +}; + static const struct ieee80211_channel zd_channels[] = { { .center_freq = 2412, .hw_value = 1 }, { .center_freq = 2417, .hw_value = 2 }, @@ -282,7 +310,7 @@ static void zd_op_stop(struct ieee80211_hw *hw) } /** - * tx_status - reports tx status of a packet if required + * zd_mac_tx_status - reports tx status of a packet if required * @hw - a &struct ieee80211_hw pointer * @skb - a sk-buffer * @flags: extra flags to set in the TX status info @@ -295,15 +323,49 @@ static void zd_op_stop(struct ieee80211_hw *hw) * * If no status information has been requested, the skb is freed. */ -static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, - int ackssi, bool success) +static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, + int ackssi, struct tx_status *tx_status) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + int i; + int success = 1, retry = 1; + int first_idx; + const struct tx_retry_rate *retries; ieee80211_tx_info_clear_status(info); - if (success) + if (tx_status) { + success = !tx_status->failure; + retry = tx_status->retry + success; + } + + if (success) { + /* success */ info->flags |= IEEE80211_TX_STAT_ACK; + } else { + /* failure */ + info->flags &= ~IEEE80211_TX_STAT_ACK; + } + + first_idx = info->status.rates[0].idx; + ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); + retries = &zd_retry_rates[first_idx]; + ZD_ASSERT(0<=retry && retry<=retries->count); + + info->status.rates[0].idx = retries->rate[0]; + info->status.rates[0].count = 1; // (retry > 1 ? 2 : 1); + + for (i=1; i<IEEE80211_TX_MAX_RATES-1 && i<retry; i++) { + info->status.rates[i].idx = retries->rate[i]; + info->status.rates[i].count = 1; // ((i==retry-1) && success ? 1:2); + } + for (; i<IEEE80211_TX_MAX_RATES && i<retry; i++) { + info->status.rates[i].idx = retries->rate[retry-1]; + info->status.rates[i].count = 1; // (success ? 1:2); + } + if (i<IEEE80211_TX_MAX_RATES) + info->status.rates[i].idx = -1; /* terminate */ + info->status.ack_signal = ackssi; ieee80211_tx_status_irqsafe(hw, skb); } @@ -316,16 +378,79 @@ static void tx_status(struct ieee80211_hw *hw, struct sk_buff *skb, * transferred. The first frame from the tx queue, will be selected and * reported as error to the upper layers. */ -void zd_mac_tx_failed(struct ieee80211_hw *hw) +void zd_mac_tx_failed(struct urb *urb) { - struct sk_buff_head *q = &zd_hw_mac(hw)->ack_wait_queue; + struct ieee80211_hw * hw = zd_usb_to_hw(urb->context); + struct zd_mac *mac = zd_hw_mac(hw); + struct sk_buff_head *q = &mac->ack_wait_queue; struct sk_buff *skb; + struct tx_status *tx_status = (struct tx_status *)urb->transfer_buffer; + unsigned long flags; + int success = !tx_status->failure; + int retry = tx_status->retry + success; + int found = 0; + int i, position = 0; - skb = skb_dequeue(q); - if (skb == NULL) - return; + q = &mac->ack_wait_queue; + spin_lock_irqsave(&q->lock, flags); + + skb_queue_walk(q, skb) { + struct ieee80211_hdr *tx_hdr; + struct ieee80211_tx_info *info; + int first_idx, final_idx; + const struct tx_retry_rate *retries; + u8 final_rate; + + position ++; + + /* if the hardware reports a failure and we had a 802.11 ACK + * pending, then we skip the first skb when searching for a + * matching frame */ + if (tx_status->failure && mac->ack_pending && + skb_queue_is_first(q, skb)) { + continue; + } + + tx_hdr = (struct ieee80211_hdr *)skb->data; + + /* we skip all frames not matching the reported destination */ + if (unlikely(memcmp(tx_hdr->addr1, tx_status->mac, ETH_ALEN))) { + continue; + } + + /* we skip all frames not matching the reported final rate */ - tx_status(hw, skb, 0, 0); + info = IEEE80211_SKB_CB(skb); + first_idx = info->status.rates[0].idx; + ZD_ASSERT(0<=first_idx && first_idx<ARRAY_SIZE(zd_retry_rates)); + retries = &zd_retry_rates[first_idx]; + if (retry < 0 || retry > retries->count) { + continue; + } + + ZD_ASSERT(0<=retry && retry<=retries->count); + final_idx = retries->rate[retry-1]; + final_rate = zd_rates[final_idx].hw_value; + + if (final_rate != tx_status->rate) { + continue; + } + + found = 1; + break; + } + + if (found) { + for (i=1; i<=position; i++) { + skb = __skb_dequeue(q); + zd_mac_tx_status(hw, skb, + mac->ack_pending ? mac->ack_signal : 0, + i == position ? tx_status : NULL); + mac->ack_pending = 0; + } + } + + spin_unlock_irqrestore(&q->lock, flags); } /** @@ -342,18 +467,27 @@ void zd_mac_tx_to_dev(struct sk_buff *skb, int error) { struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct ieee80211_hw *hw = info->rate_driver_data[0]; + struct zd_mac *mac = zd_hw_mac(hw); + + ieee80211_tx_info_clear_status(info); skb_pull(skb, sizeof(struct zd_ctrlset)); if (unlikely(error || (info->flags & IEEE80211_TX_CTL_NO_ACK))) { - tx_status(hw, skb, 0, !error); + /* + * FIXME : do we need to fill in anything ? + */ + ieee80211_tx_status_irqsafe(hw, skb); } else { - struct sk_buff_head *q = - &zd_hw_mac(hw)->ack_wait_queue; + struct sk_buff_head *q = &mac->ack_wait_queue; skb_queue_tail(q, skb); - while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) - zd_mac_tx_failed(hw); + while (skb_queue_len(q) > ZD_MAC_MAX_ACK_WAITERS) { + zd_mac_tx_status(hw, skb_dequeue(q), + mac->ack_pending ? mac->ack_signal : 0, + NULL); + mac->ack_pending = 0; + } } } @@ -606,27 +740,47 @@ fail: static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr, struct ieee80211_rx_status *stats) { + struct zd_mac *mac = zd_hw_mac(hw); struct sk_buff *skb; struct sk_buff_head *q; unsigned long flags; + int found = 0; + int i, position = 0; if (!ieee80211_is_ack(rx_hdr->frame_control)) return 0; - q = &zd_hw_mac(hw)->ack_wait_queue; + q = &mac->ack_wait_queue; spin_lock_irqsave(&q->lock, flags); skb_queue_walk(q, skb) { struct ieee80211_hdr *tx_hdr; + position ++; + + if (mac->ack_pending && skb_queue_is_first(q, skb)) + continue; + tx_hdr = (struct ieee80211_hdr *)skb->data; if (likely(!memcmp(tx_hdr->addr2, rx_hdr->addr1, ETH_ALEN))) { - __skb_unlink(skb, q); - tx_status(hw, skb, stats->signal, 1); - goto out; + found = 1; + break; } } -out: + + if (found) { + for (i=1; i<position; i++) { + skb = __skb_dequeue(q); + zd_mac_tx_status(hw, skb, + mac->ack_pending ? mac->ack_signal : 0, + NULL); + mac->ack_pending = 0; + } + + mac->ack_pending = 1; + mac->ack_signal = stats->signal; + } + spin_unlock_irqrestore(&q->lock, flags); return 1; } @@ -709,6 +863,7 @@ int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length) skb_reserve(skb, 2); } + /* FIXME : could we avoid this big memcpy ? */ memcpy(skb_put(skb, length), buffer, length); memcpy(IEEE80211_SKB_RXCB(skb), &stats, sizeof(stats)); @@ -999,7 +1154,14 @@ struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf) hw->queues = 1; hw->extra_tx_headroom = sizeof(struct zd_ctrlset); + /* + * Tell mac80211 that we support multi rate retries + */ + hw->max_rates = IEEE80211_TX_MAX_RATES; + hw->max_rate_tries = 18; /* 9 rates * 2 retries/rate */ + skb_queue_head_init(&mac->ack_wait_queue); + mac->ack_pending = 0; zd_chip_init(&mac->chip, hw, intf); housekeeping_init(mac); diff --git a/drivers/net/wireless/zd1211rw/zd_mac.h b/drivers/net/wireless/zd1211rw/zd_mac.h index 7c27591..630c298 100644 --- a/drivers/net/wireless/zd1211rw/zd_mac.h +++ b/drivers/net/wireless/zd1211rw/zd_mac.h @@ -140,6 +140,21 @@ struct rx_status { #define ZD_RX_CRC16_ERROR 0x40 #define ZD_RX_ERROR 0x80 +struct tx_retry_rate { + int count; /* number of valid element in rate[] array */ + int rate[10]; /* retry rates, described by an index in zd_rates[] */ +}; + +struct tx_status { + u8 type; /* must always be 0x01 : USB_INT_TYPE */ + u8 id; /* must always be 0xa0 : USB_INT_ID_RETRY_FAILED */ + u8 rate; + u8 pad; + u8 mac[ETH_ALEN]; + u8 retry; + u8 failure; +} __attribute__((packed)); + enum mac_flags { MAC_FIXED_CHANNEL = 0x01, }; @@ -150,7 +165,7 @@ struct housekeeping { #define ZD_MAC_STATS_BUFFER_SIZE 16 -#define ZD_MAC_MAX_ACK_WAITERS 10 +#define ZD_MAC_MAX_ACK_WAITERS 50 struct zd_mac { struct zd_chip chip; @@ -184,6 +199,12 @@ struct zd_mac { /* whether to pass control frames to stack */ unsigned int pass_ctrl:1; + + /* whether we have received a 802.11 ACK that is pending */ + unsigned int ack_pending:1; + + /* signal strength of the last 802.11 ACK received */ + int ack_signal; }; #define ZD_REGDOMAIN_FCC 0x10 @@ -279,7 +300,7 @@ int zd_mac_preinit_hw(struct ieee80211_hw *hw); int zd_mac_init_hw(struct ieee80211_hw *hw); int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length); -void zd_mac_tx_failed(struct ieee80211_hw *hw); +void zd_mac_tx_failed(struct urb *urb); void zd_mac_tx_to_dev(struct sk_buff *skb, int error); #ifdef DEBUG diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c index 23a6a6d..ac19ecd 100644 --- a/drivers/net/wireless/zd1211rw/zd_usb.c +++ b/drivers/net/wireless/zd1211rw/zd_usb.c @@ -318,6 +318,13 @@ error: return r; } +MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ur"); +MODULE_FIRMWARE(FW_ZD1211_PREFIX "ur"); +MODULE_FIRMWARE(FW_ZD1211B_PREFIX "ub"); +MODULE_FIRMWARE(FW_ZD1211_PREFIX "ub"); +MODULE_FIRMWARE(FW_ZD1211B_PREFIX "uphr"); +MODULE_FIRMWARE(FW_ZD1211_PREFIX "uphr"); + /* Read data from device address space using "firmware interface" which does * not require firmware to be loaded. */ int zd_usb_read_fw(struct zd_usb *usb, zd_addr_t addr, u8 *data, u16 len) @@ -419,7 +426,7 @@ static void int_urb_complete(struct urb *urb) handle_regs_int(urb); break; case USB_INT_ID_RETRY_FAILED: - zd_mac_tx_failed(zd_usb_to_hw(urb->context)); + zd_mac_tx_failed(urb); break; default: dev_dbg_f(urb_dev(urb), "error: urb %p unknown id %x\n", urb, @@ -553,6 +560,8 @@ static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer, if (length < sizeof(struct rx_length_info)) { /* It's not a complete packet anyhow. */ + printk("%s: invalid, small RX packet : %d\n", + __func__, length); return; } length_info = (struct rx_length_info *) |