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Diffstat (limited to 'drivers/net/wireless/zd1211rw')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_chip.c169
-rw-r--r--drivers/net/wireless/zd1211rw/zd_chip.h5
-rw-r--r--drivers/net/wireless/zd1211rw/zd_def.h2
-rw-r--r--drivers/net/wireless/zd1211rw/zd_mac.c453
-rw-r--r--drivers/net/wireless/zd1211rw/zd_mac.h24
-rw-r--r--drivers/net/wireless/zd1211rw/zd_usb.c597
-rw-r--r--drivers/net/wireless/zd1211rw/zd_usb.h37
7 files changed, 988 insertions, 299 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_chip.c b/drivers/net/wireless/zd1211rw/zd_chip.c
index 6a9b66051cf7..a73a305d3cba 100644
--- a/drivers/net/wireless/zd1211rw/zd_chip.c
+++ b/drivers/net/wireless/zd1211rw/zd_chip.c
@@ -108,25 +108,17 @@ int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr
{
int r;
int i;
- zd_addr_t *a16;
- u16 *v16;
+ zd_addr_t a16[USB_MAX_IOREAD32_COUNT * 2];
+ u16 v16[USB_MAX_IOREAD32_COUNT * 2];
unsigned int count16;
if (count > USB_MAX_IOREAD32_COUNT)
return -EINVAL;
- /* Allocate a single memory block for values and addresses. */
- count16 = 2*count;
- /* zd_addr_t is __nocast, so the kmalloc needs an explicit cast */
- a16 = (zd_addr_t *) kmalloc(count16 * (sizeof(zd_addr_t) + sizeof(u16)),
- GFP_KERNEL);
- if (!a16) {
- dev_dbg_f(zd_chip_dev(chip),
- "error ENOMEM in allocation of a16\n");
- r = -ENOMEM;
- goto out;
- }
- v16 = (u16 *)(a16 + count16);
+ /* Use stack for values and addresses. */
+ count16 = 2 * count;
+ BUG_ON(count16 * sizeof(zd_addr_t) > sizeof(a16));
+ BUG_ON(count16 * sizeof(u16) > sizeof(v16));
for (i = 0; i < count; i++) {
int j = 2*i;
@@ -139,7 +131,7 @@ int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error: zd_ioread16v_locked. Error number %d\n", r);
- goto out;
+ return r;
}
for (i = 0; i < count; i++) {
@@ -147,18 +139,19 @@ int zd_ioread32v_locked(struct zd_chip *chip, u32 *values, const zd_addr_t *addr
values[i] = (v16[j] << 16) | v16[j+1];
}
-out:
- kfree((void *)a16);
- return r;
+ return 0;
}
-int _zd_iowrite32v_locked(struct zd_chip *chip, const struct zd_ioreq32 *ioreqs,
- unsigned int count)
+static int _zd_iowrite32v_async_locked(struct zd_chip *chip,
+ const struct zd_ioreq32 *ioreqs,
+ unsigned int count)
{
int i, j, r;
- struct zd_ioreq16 *ioreqs16;
+ struct zd_ioreq16 ioreqs16[USB_MAX_IOWRITE32_COUNT * 2];
unsigned int count16;
+ /* Use stack for values and addresses. */
+
ZD_ASSERT(mutex_is_locked(&chip->mutex));
if (count == 0)
@@ -166,15 +159,8 @@ int _zd_iowrite32v_locked(struct zd_chip *chip, const struct zd_ioreq32 *ioreqs,
if (count > USB_MAX_IOWRITE32_COUNT)
return -EINVAL;
- /* Allocate a single memory block for values and addresses. */
- count16 = 2*count;
- ioreqs16 = kmalloc(count16 * sizeof(struct zd_ioreq16), GFP_KERNEL);
- if (!ioreqs16) {
- r = -ENOMEM;
- dev_dbg_f(zd_chip_dev(chip),
- "error %d in ioreqs16 allocation\n", r);
- goto out;
- }
+ count16 = 2 * count;
+ BUG_ON(count16 * sizeof(struct zd_ioreq16) > sizeof(ioreqs16));
for (i = 0; i < count; i++) {
j = 2*i;
@@ -185,18 +171,30 @@ int _zd_iowrite32v_locked(struct zd_chip *chip, const struct zd_ioreq32 *ioreqs,
ioreqs16[j+1].addr = ioreqs[i].addr;
}
- r = zd_usb_iowrite16v(&chip->usb, ioreqs16, count16);
+ r = zd_usb_iowrite16v_async(&chip->usb, ioreqs16, count16);
#ifdef DEBUG
if (r) {
dev_dbg_f(zd_chip_dev(chip),
"error %d in zd_usb_write16v\n", r);
}
#endif /* DEBUG */
-out:
- kfree(ioreqs16);
return r;
}
+int _zd_iowrite32v_locked(struct zd_chip *chip, const struct zd_ioreq32 *ioreqs,
+ unsigned int count)
+{
+ int r;
+
+ zd_usb_iowrite16v_async_start(&chip->usb);
+ r = _zd_iowrite32v_async_locked(chip, ioreqs, count);
+ if (r) {
+ zd_usb_iowrite16v_async_end(&chip->usb, 0);
+ return r;
+ }
+ return zd_usb_iowrite16v_async_end(&chip->usb, 50 /* ms */);
+}
+
int zd_iowrite16a_locked(struct zd_chip *chip,
const struct zd_ioreq16 *ioreqs, unsigned int count)
{
@@ -204,6 +202,8 @@ int zd_iowrite16a_locked(struct zd_chip *chip,
unsigned int i, j, t, max;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
+ zd_usb_iowrite16v_async_start(&chip->usb);
+
for (i = 0; i < count; i += j + t) {
t = 0;
max = count-i;
@@ -216,8 +216,9 @@ int zd_iowrite16a_locked(struct zd_chip *chip,
}
}
- r = zd_usb_iowrite16v(&chip->usb, &ioreqs[i], j);
+ r = zd_usb_iowrite16v_async(&chip->usb, &ioreqs[i], j);
if (r) {
+ zd_usb_iowrite16v_async_end(&chip->usb, 0);
dev_dbg_f(zd_chip_dev(chip),
"error zd_usb_iowrite16v. Error number %d\n",
r);
@@ -225,7 +226,7 @@ int zd_iowrite16a_locked(struct zd_chip *chip,
}
}
- return 0;
+ return zd_usb_iowrite16v_async_end(&chip->usb, 50 /* ms */);
}
/* Writes a variable number of 32 bit registers. The functions will split
@@ -238,6 +239,8 @@ int zd_iowrite32a_locked(struct zd_chip *chip,
int r;
unsigned int i, j, t, max;
+ zd_usb_iowrite16v_async_start(&chip->usb);
+
for (i = 0; i < count; i += j + t) {
t = 0;
max = count-i;
@@ -250,8 +253,9 @@ int zd_iowrite32a_locked(struct zd_chip *chip,
}
}
- r = _zd_iowrite32v_locked(chip, &ioreqs[i], j);
+ r = _zd_iowrite32v_async_locked(chip, &ioreqs[i], j);
if (r) {
+ zd_usb_iowrite16v_async_end(&chip->usb, 0);
dev_dbg_f(zd_chip_dev(chip),
"error _zd_iowrite32v_locked."
" Error number %d\n", r);
@@ -259,7 +263,7 @@ int zd_iowrite32a_locked(struct zd_chip *chip,
}
}
- return 0;
+ return zd_usb_iowrite16v_async_end(&chip->usb, 50 /* ms */);
}
int zd_ioread16(struct zd_chip *chip, zd_addr_t addr, u16 *value)
@@ -370,16 +374,12 @@ error:
return r;
}
-/* MAC address: if custom mac addresses are to be used CR_MAC_ADDR_P1 and
- * CR_MAC_ADDR_P2 must be overwritten
- */
-int zd_write_mac_addr(struct zd_chip *chip, const u8 *mac_addr)
+static int zd_write_mac_addr_common(struct zd_chip *chip, const u8 *mac_addr,
+ const struct zd_ioreq32 *in_reqs,
+ const char *type)
{
int r;
- struct zd_ioreq32 reqs[2] = {
- [0] = { .addr = CR_MAC_ADDR_P1 },
- [1] = { .addr = CR_MAC_ADDR_P2 },
- };
+ struct zd_ioreq32 reqs[2] = {in_reqs[0], in_reqs[1]};
if (mac_addr) {
reqs[0].value = (mac_addr[3] << 24)
@@ -388,9 +388,9 @@ int zd_write_mac_addr(struct zd_chip *chip, const u8 *mac_addr)
| mac_addr[0];
reqs[1].value = (mac_addr[5] << 8)
| mac_addr[4];
- dev_dbg_f(zd_chip_dev(chip), "mac addr %pM\n", mac_addr);
+ dev_dbg_f(zd_chip_dev(chip), "%s addr %pM\n", type, mac_addr);
} else {
- dev_dbg_f(zd_chip_dev(chip), "set NULL mac\n");
+ dev_dbg_f(zd_chip_dev(chip), "set NULL %s\n", type);
}
mutex_lock(&chip->mutex);
@@ -399,6 +399,29 @@ int zd_write_mac_addr(struct zd_chip *chip, const u8 *mac_addr)
return r;
}
+/* MAC address: if custom mac addresses are to be used CR_MAC_ADDR_P1 and
+ * CR_MAC_ADDR_P2 must be overwritten
+ */
+int zd_write_mac_addr(struct zd_chip *chip, const u8 *mac_addr)
+{
+ static const struct zd_ioreq32 reqs[2] = {
+ [0] = { .addr = CR_MAC_ADDR_P1 },
+ [1] = { .addr = CR_MAC_ADDR_P2 },
+ };
+
+ return zd_write_mac_addr_common(chip, mac_addr, reqs, "mac");
+}
+
+int zd_write_bssid(struct zd_chip *chip, const u8 *bssid)
+{
+ static const struct zd_ioreq32 reqs[2] = {
+ [0] = { .addr = CR_BSSID_P1 },
+ [1] = { .addr = CR_BSSID_P2 },
+ };
+
+ return zd_write_mac_addr_common(chip, bssid, reqs, "bssid");
+}
+
int zd_read_regdomain(struct zd_chip *chip, u8 *regdomain)
{
int r;
@@ -849,11 +872,12 @@ static int get_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
static int set_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
{
struct zd_ioreq32 reqs[3];
+ u16 b_interval = s->beacon_interval & 0xffff;
- if (s->beacon_interval <= 5)
- s->beacon_interval = 5;
- if (s->pre_tbtt < 4 || s->pre_tbtt >= s->beacon_interval)
- s->pre_tbtt = s->beacon_interval - 1;
+ if (b_interval <= 5)
+ b_interval = 5;
+ if (s->pre_tbtt < 4 || s->pre_tbtt >= b_interval)
+ s->pre_tbtt = b_interval - 1;
if (s->atim_wnd_period >= s->pre_tbtt)
s->atim_wnd_period = s->pre_tbtt - 1;
@@ -862,31 +886,57 @@ static int set_aw_pt_bi(struct zd_chip *chip, struct aw_pt_bi *s)
reqs[1].addr = CR_PRE_TBTT;
reqs[1].value = s->pre_tbtt;
reqs[2].addr = CR_BCN_INTERVAL;
- reqs[2].value = s->beacon_interval;
+ reqs[2].value = (s->beacon_interval & ~0xffff) | b_interval;
return zd_iowrite32a_locked(chip, reqs, ARRAY_SIZE(reqs));
}
-static int set_beacon_interval(struct zd_chip *chip, u32 interval)
+static int set_beacon_interval(struct zd_chip *chip, u16 interval,
+ u8 dtim_period, int type)
{
int r;
struct aw_pt_bi s;
+ u32 b_interval, mode_flag;
ZD_ASSERT(mutex_is_locked(&chip->mutex));
+
+ if (interval > 0) {
+ switch (type) {
+ case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_MESH_POINT:
+ mode_flag = BCN_MODE_IBSS;
+ break;
+ case NL80211_IFTYPE_AP:
+ mode_flag = BCN_MODE_AP;
+ break;
+ default:
+ mode_flag = 0;
+ break;
+ }
+ } else {
+ dtim_period = 0;
+ mode_flag = 0;
+ }
+
+ b_interval = mode_flag | (dtim_period << 16) | interval;
+
+ r = zd_iowrite32_locked(chip, b_interval, CR_BCN_INTERVAL);
+ if (r)
+ return r;
r = get_aw_pt_bi(chip, &s);
if (r)
return r;
- s.beacon_interval = interval;
return set_aw_pt_bi(chip, &s);
}
-int zd_set_beacon_interval(struct zd_chip *chip, u32 interval)
+int zd_set_beacon_interval(struct zd_chip *chip, u16 interval, u8 dtim_period,
+ int type)
{
int r;
mutex_lock(&chip->mutex);
- r = set_beacon_interval(chip, interval);
+ r = set_beacon_interval(chip, interval, dtim_period, type);
mutex_unlock(&chip->mutex);
return r;
}
@@ -905,7 +955,7 @@ static int hw_init(struct zd_chip *chip)
if (r)
return r;
- return set_beacon_interval(chip, 100);
+ return set_beacon_interval(chip, 100, 0, NL80211_IFTYPE_UNSPECIFIED);
}
static zd_addr_t fw_reg_addr(struct zd_chip *chip, u16 offset)
@@ -1407,6 +1457,9 @@ void zd_chip_disable_int(struct zd_chip *chip)
mutex_lock(&chip->mutex);
zd_usb_disable_int(&chip->usb);
mutex_unlock(&chip->mutex);
+
+ /* cancel pending interrupt work */
+ cancel_work_sync(&zd_chip_to_mac(chip)->process_intr);
}
int zd_chip_enable_rxtx(struct zd_chip *chip)
@@ -1416,6 +1469,7 @@ int zd_chip_enable_rxtx(struct zd_chip *chip)
mutex_lock(&chip->mutex);
zd_usb_enable_tx(&chip->usb);
r = zd_usb_enable_rx(&chip->usb);
+ zd_tx_watchdog_enable(&chip->usb);
mutex_unlock(&chip->mutex);
return r;
}
@@ -1423,6 +1477,7 @@ int zd_chip_enable_rxtx(struct zd_chip *chip)
void zd_chip_disable_rxtx(struct zd_chip *chip)
{
mutex_lock(&chip->mutex);
+ zd_tx_watchdog_disable(&chip->usb);
zd_usb_disable_rx(&chip->usb);
zd_usb_disable_tx(&chip->usb);
mutex_unlock(&chip->mutex);
diff --git a/drivers/net/wireless/zd1211rw/zd_chip.h b/drivers/net/wireless/zd1211rw/zd_chip.h
index f8bbf7d302ae..14e4402a6111 100644
--- a/drivers/net/wireless/zd1211rw/zd_chip.h
+++ b/drivers/net/wireless/zd1211rw/zd_chip.h
@@ -546,6 +546,7 @@ enum {
#define RX_FILTER_CTRL (RX_FILTER_RTS | RX_FILTER_CTS | \
RX_FILTER_CFEND | RX_FILTER_CFACK)
+#define BCN_MODE_AP 0x1000000
#define BCN_MODE_IBSS 0x2000000
/* Monitor mode sets filter to 0xfffff */
@@ -881,6 +882,7 @@ static inline u8 _zd_chip_get_channel(struct zd_chip *chip)
u8 zd_chip_get_channel(struct zd_chip *chip);
int zd_read_regdomain(struct zd_chip *chip, u8 *regdomain);
int zd_write_mac_addr(struct zd_chip *chip, const u8 *mac_addr);
+int zd_write_bssid(struct zd_chip *chip, const u8 *bssid);
int zd_chip_switch_radio_on(struct zd_chip *chip);
int zd_chip_switch_radio_off(struct zd_chip *chip);
int zd_chip_enable_int(struct zd_chip *chip);
@@ -920,7 +922,8 @@ enum led_status {
int zd_chip_control_leds(struct zd_chip *chip, enum led_status status);
-int zd_set_beacon_interval(struct zd_chip *chip, u32 interval);
+int zd_set_beacon_interval(struct zd_chip *chip, u16 interval, u8 dtim_period,
+ int type);
static inline int zd_get_beacon_interval(struct zd_chip *chip, u32 *interval)
{
diff --git a/drivers/net/wireless/zd1211rw/zd_def.h b/drivers/net/wireless/zd1211rw/zd_def.h
index 6ac597ffd3b9..5463ca9ebc01 100644
--- a/drivers/net/wireless/zd1211rw/zd_def.h
+++ b/drivers/net/wireless/zd1211rw/zd_def.h
@@ -45,7 +45,7 @@ typedef u16 __nocast zd_addr_t;
#ifdef DEBUG
# define ZD_ASSERT(x) \
do { \
- if (!(x)) { \
+ if (unlikely(!(x))) { \
pr_debug("%s:%d ASSERT %s VIOLATED!\n", \
__FILE__, __LINE__, __stringify(x)); \
dump_stack(); \
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 6107304cb94c..5037c8b2b415 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -138,6 +138,12 @@ static const struct ieee80211_channel zd_channels[] = {
static void housekeeping_init(struct zd_mac *mac);
static void housekeeping_enable(struct zd_mac *mac);
static void housekeeping_disable(struct zd_mac *mac);
+static void beacon_init(struct zd_mac *mac);
+static void beacon_enable(struct zd_mac *mac);
+static void beacon_disable(struct zd_mac *mac);
+static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble);
+static int zd_mac_config_beacon(struct ieee80211_hw *hw,
+ struct sk_buff *beacon);
static int zd_reg2alpha2(u8 regdomain, char *alpha2)
{
@@ -231,6 +237,26 @@ static int set_rx_filter(struct zd_mac *mac)
return zd_iowrite32(&mac->chip, CR_RX_FILTER, filter);
}
+static int set_mac_and_bssid(struct zd_mac *mac)
+{
+ int r;
+
+ if (!mac->vif)
+ return -1;
+
+ r = zd_write_mac_addr(&mac->chip, mac->vif->addr);
+ if (r)
+ return r;
+
+ /* Vendor driver after setting MAC either sets BSSID for AP or
+ * filter for other modes.
+ */
+ if (mac->type != NL80211_IFTYPE_AP)
+ return set_rx_filter(mac);
+ else
+ return zd_write_bssid(&mac->chip, mac->vif->addr);
+}
+
static int set_mc_hash(struct zd_mac *mac)
{
struct zd_mc_hash hash;
@@ -238,7 +264,7 @@ static int set_mc_hash(struct zd_mac *mac)
return zd_chip_set_multicast_hash(&mac->chip, &hash);
}
-static int zd_op_start(struct ieee80211_hw *hw)
+int zd_op_start(struct ieee80211_hw *hw)
{
struct zd_mac *mac = zd_hw_mac(hw);
struct zd_chip *chip = &mac->chip;
@@ -275,6 +301,8 @@ static int zd_op_start(struct ieee80211_hw *hw)
goto disable_rxtx;
housekeeping_enable(mac);
+ beacon_enable(mac);
+ set_bit(ZD_DEVICE_RUNNING, &mac->flags);
return 0;
disable_rxtx:
zd_chip_disable_rxtx(chip);
@@ -286,19 +314,22 @@ out:
return r;
}
-static void zd_op_stop(struct ieee80211_hw *hw)
+void zd_op_stop(struct ieee80211_hw *hw)
{
struct zd_mac *mac = zd_hw_mac(hw);
struct zd_chip *chip = &mac->chip;
struct sk_buff *skb;
struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue;
+ clear_bit(ZD_DEVICE_RUNNING, &mac->flags);
+
/* The order here deliberately is a little different from the open()
* method, since we need to make sure there is no opportunity for RX
* frames to be processed by mac80211 after we have stopped it.
*/
zd_chip_disable_rxtx(chip);
+ beacon_disable(mac);
housekeeping_disable(mac);
flush_workqueue(zd_workqueue);
@@ -311,6 +342,68 @@ static void zd_op_stop(struct ieee80211_hw *hw)
dev_kfree_skb_any(skb);
}
+int zd_restore_settings(struct zd_mac *mac)
+{
+ struct sk_buff *beacon;
+ struct zd_mc_hash multicast_hash;
+ unsigned int short_preamble;
+ int r, beacon_interval, beacon_period;
+ u8 channel;
+
+ dev_dbg_f(zd_mac_dev(mac), "\n");
+
+ spin_lock_irq(&mac->lock);
+ multicast_hash = mac->multicast_hash;
+ short_preamble = mac->short_preamble;
+ beacon_interval = mac->beacon.interval;
+ beacon_period = mac->beacon.period;
+ channel = mac->channel;
+ spin_unlock_irq(&mac->lock);
+
+ r = set_mac_and_bssid(mac);
+ if (r < 0) {
+ dev_dbg_f(zd_mac_dev(mac), "set_mac_and_bssid failed, %d\n", r);
+ return r;
+ }
+
+ r = zd_chip_set_channel(&mac->chip, channel);
+ if (r < 0) {
+ dev_dbg_f(zd_mac_dev(mac), "zd_chip_set_channel failed, %d\n",
+ r);
+ return r;
+ }
+
+ set_rts_cts(mac, short_preamble);
+
+ r = zd_chip_set_multicast_hash(&mac->chip, &multicast_hash);
+ if (r < 0) {
+ dev_dbg_f(zd_mac_dev(mac),
+ "zd_chip_set_multicast_hash failed, %d\n", r);
+ return r;
+ }
+
+ if (mac->type == NL80211_IFTYPE_MESH_POINT ||
+ mac->type == NL80211_IFTYPE_ADHOC ||
+ mac->type == NL80211_IFTYPE_AP) {
+ if (mac->vif != NULL) {
+ beacon = ieee80211_beacon_get(mac->hw, mac->vif);
+ if (beacon) {
+ zd_mac_config_beacon(mac->hw, beacon);
+ kfree_skb(beacon);
+ }
+ }
+
+ zd_set_beacon_interval(&mac->chip, beacon_interval,
+ beacon_period, mac->type);
+
+ spin_lock_irq(&mac->lock);
+ mac->beacon.last_update = jiffies;
+ spin_unlock_irq(&mac->lock);
+ }
+
+ return 0;
+}
+
/**
* zd_mac_tx_status - reports tx status of a packet if required
* @hw - a &struct ieee80211_hw pointer
@@ -574,64 +667,120 @@ static void cs_set_control(struct zd_mac *mac, struct zd_ctrlset *cs,
static int zd_mac_config_beacon(struct ieee80211_hw *hw, struct sk_buff *beacon)
{
struct zd_mac *mac = zd_hw_mac(hw);
- int r;
+ int r, ret, num_cmds, req_pos = 0;
u32 tmp, j = 0;
/* 4 more bytes for tail CRC */
u32 full_len = beacon->len + 4;
+ unsigned long end_jiffies, message_jiffies;
+ struct zd_ioreq32 *ioreqs;
- r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 0);
+ /* Alloc memory for full beacon write at once. */
+ num_cmds = 1 + zd_chip_is_zd1211b(&mac->chip) + full_len;
+ ioreqs = kmalloc(num_cmds * sizeof(struct zd_ioreq32), GFP_KERNEL);
+ if (!ioreqs)
+ return -ENOMEM;
+
+ mutex_lock(&mac->chip.mutex);
+
+ r = zd_iowrite32_locked(&mac->chip, 0, CR_BCN_FIFO_SEMAPHORE);
if (r < 0)
- return r;
- r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
+ goto out;
+ r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE);
if (r < 0)
- return r;
+ goto release_sema;
+ end_jiffies = jiffies + HZ / 2; /*~500ms*/
+ message_jiffies = jiffies + HZ / 10; /*~100ms*/
while (tmp & 0x2) {
- r = zd_ioread32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, &tmp);
+ r = zd_ioread32_locked(&mac->chip, &tmp, CR_BCN_FIFO_SEMAPHORE);
if (r < 0)
- return r;
- if ((++j % 100) == 0) {
- printk(KERN_ERR "CR_BCN_FIFO_SEMAPHORE not ready\n");
- if (j >= 500) {
- printk(KERN_ERR "Giving up beacon config.\n");
- return -ETIMEDOUT;
+ goto release_sema;
+ if (time_is_before_eq_jiffies(message_jiffies)) {
+ message_jiffies = jiffies + HZ / 10;
+ dev_err(zd_mac_dev(mac),
+ "CR_BCN_FIFO_SEMAPHORE not ready\n");
+ if (time_is_before_eq_jiffies(end_jiffies)) {
+ dev_err(zd_mac_dev(mac),
+ "Giving up beacon config.\n");
+ r = -ETIMEDOUT;
+ goto reset_device;
}
}
- msleep(1);
+ msleep(20);
}
- r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, full_len - 1);
- if (r < 0)
- return r;
+ ioreqs[req_pos].addr = CR_BCN_FIFO;
+ ioreqs[req_pos].value = full_len - 1;
+ req_pos++;
if (zd_chip_is_zd1211b(&mac->chip)) {
- r = zd_iowrite32(&mac->chip, CR_BCN_LENGTH, full_len - 1);
- if (r < 0)
- return r;
+ ioreqs[req_pos].addr = CR_BCN_LENGTH;
+ ioreqs[req_pos].value = full_len - 1;
+ req_pos++;
}
for (j = 0 ; j < beacon->len; j++) {
- r = zd_iowrite32(&mac->chip, CR_BCN_FIFO,
- *((u8 *)(beacon->data + j)));
- if (r < 0)
- return r;
+ ioreqs[req_pos].addr = CR_BCN_FIFO;
+ ioreqs[req_pos].value = *((u8 *)(beacon->data + j));
+ req_pos++;
}
for (j = 0; j < 4; j++) {
- r = zd_iowrite32(&mac->chip, CR_BCN_FIFO, 0x0);
- if (r < 0)
- return r;
+ ioreqs[req_pos].addr = CR_BCN_FIFO;
+ ioreqs[req_pos].value = 0x0;
+ req_pos++;
}
- r = zd_iowrite32(&mac->chip, CR_BCN_FIFO_SEMAPHORE, 1);
- if (r < 0)
- return r;
+ BUG_ON(req_pos != num_cmds);
+
+ r = zd_iowrite32a_locked(&mac->chip, ioreqs, num_cmds);
+
+release_sema:
+ /*
+ * Try very hard to release device beacon semaphore, as otherwise
+ * device/driver can be left in unusable state.
+ */
+ end_jiffies = jiffies + HZ / 2; /*~500ms*/
+ ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE);
+ while (ret < 0) {
+ if (time_is_before_eq_jiffies(end_jiffies)) {
+ ret = -ETIMEDOUT;
+ break;
+ }
+
+ msleep(20);
+ ret = zd_iowrite32_locked(&mac->chip, 1, CR_BCN_FIFO_SEMAPHORE);
+ }
+
+ if (ret < 0)
+ dev_err(zd_mac_dev(mac), "Could not release "
+ "CR_BCN_FIFO_SEMAPHORE!\n");
+ if (r < 0 || ret < 0) {
+ if (r >= 0)
+ r = ret;
+ goto out;
+ }
/* 802.11b/g 2.4G CCK 1Mb
* 802.11a, not yet implemented, uses different values (see GPL vendor
* driver)
*/
- return zd_iowrite32(&mac->chip, CR_BCN_PLCP_CFG, 0x00000400 |
- (full_len << 19));
+ r = zd_iowrite32_locked(&mac->chip, 0x00000400 | (full_len << 19),
+ CR_BCN_PLCP_CFG);
+out:
+ mutex_unlock(&mac->chip.mutex);
+ kfree(ioreqs);
+ return r;
+
+reset_device:
+ mutex_unlock(&mac->chip.mutex);
+ kfree(ioreqs);
+
+ /* semaphore stuck, reset device to avoid fw freeze later */
+ dev_warn(zd_mac_dev(mac), "CR_BCN_FIFO_SEMAPHORE stuck, "
+ "reseting device...");
+ usb_queue_reset_device(mac->chip.usb.intf);
+
+ return r;
}
static int fill_ctrlset(struct zd_mac *mac,
@@ -701,7 +850,7 @@ static int fill_ctrlset(struct zd_mac *mac,
* control block of the skbuff will be initialized. If necessary the incoming
* mac80211 queues will be stopped.
*/
-static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
+static void zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct zd_mac *mac = zd_hw_mac(hw);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
@@ -716,11 +865,10 @@ static int zd_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
r = zd_usb_tx(&mac->chip.usb, skb);
if (r)
goto fail;
- return 0;
+ return;
fail:
dev_kfree_skb(skb);
- return 0;
}
/**
@@ -779,6 +927,13 @@ static int filter_ack(struct ieee80211_hw *hw, struct ieee80211_hdr *rx_hdr,
mac->ack_pending = 1;
mac->ack_signal = stats->signal;
+
+ /* Prevent pending tx-packet on AP-mode */
+ if (mac->type == NL80211_IFTYPE_AP) {
+ skb = __skb_dequeue(q);
+ zd_mac_tx_status(hw, skb, mac->ack_signal, NULL);
+ mac->ack_pending = 0;
+ }
}
spin_unlock_irqrestore(&q->lock, flags);
@@ -882,13 +1037,16 @@ static int zd_op_add_interface(struct ieee80211_hw *hw,
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_ADHOC:
+ case NL80211_IFTYPE_AP:
mac->type = vif->type;
break;
default:
return -EOPNOTSUPP;
}
- return zd_write_mac_addr(&mac->chip, vif->addr);
+ mac->vif = vif;
+
+ return set_mac_and_bssid(mac);
}
static void zd_op_remove_interface(struct ieee80211_hw *hw,
@@ -896,7 +1054,8 @@ static void zd_op_remove_interface(struct ieee80211_hw *hw,
{
struct zd_mac *mac = zd_hw_mac(hw);
mac->type = NL80211_IFTYPE_UNSPECIFIED;
- zd_set_beacon_interval(&mac->chip, 0);
+ mac->vif = NULL;
+ zd_set_beacon_interval(&mac->chip, 0, 0, NL80211_IFTYPE_UNSPECIFIED);
zd_write_mac_addr(&mac->chip, NULL);
}
@@ -905,49 +1064,67 @@ static int zd_op_config(struct ieee80211_hw *hw, u32 changed)
struct zd_mac *mac = zd_hw_mac(hw);
struct ieee80211_conf *conf = &hw->conf;
+ spin_lock_irq(&mac->lock);
+ mac->channel = conf->channel->hw_value;
+ spin_unlock_irq(&mac->lock);
+
return zd_chip_set_channel(&mac->chip, conf->channel->hw_value);
}
-static void zd_process_intr(struct work_struct *work)
+static void zd_beacon_done(struct zd_mac *mac)
{
- u16 int_status;
- struct zd_mac *mac = container_of(work, struct zd_mac, process_intr);
+ struct sk_buff *skb, *beacon;
- int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer+4));
- if (int_status & INT_CFG_NEXT_BCN)
- dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");
- else
- dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n");
-
- zd_chip_enable_hwint(&mac->chip);
-}
+ if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
+ return;
+ if (!mac->vif || mac->vif->type != NL80211_IFTYPE_AP)
+ return;
+ /*
+ * Send out buffered broad- and multicast frames.
+ */
+ while (!ieee80211_queue_stopped(mac->hw, 0)) {
+ skb = ieee80211_get_buffered_bc(mac->hw, mac->vif);
+ if (!skb)
+ break;
+ zd_op_tx(mac->hw, skb);
+ }
-static void set_multicast_hash_handler(struct work_struct *work)
-{
- struct zd_mac *mac =
- container_of(work, struct zd_mac, set_multicast_hash_work);
- struct zd_mc_hash hash;
+ /*
+ * Fetch next beacon so that tim_count is updated.
+ */
+ beacon = ieee80211_beacon_get(mac->hw, mac->vif);
+ if (beacon) {
+ zd_mac_config_beacon(mac->hw, beacon);
+ kfree_skb(beacon);
+ }
spin_lock_irq(&mac->lock);
- hash = mac->multicast_hash;
+ mac->beacon.last_update = jiffies;
spin_unlock_irq(&mac->lock);
-
- zd_chip_set_multicast_hash(&mac->chip, &hash);
}
-static void set_rx_filter_handler(struct work_struct *work)
+static void zd_process_intr(struct work_struct *work)
{
- struct zd_mac *mac =
- container_of(work, struct zd_mac, set_rx_filter_work);
- int r;
+ u16 int_status;
+ unsigned long flags;
+ struct zd_mac *mac = container_of(work, struct zd_mac, process_intr);
- dev_dbg_f(zd_mac_dev(mac), "\n");
- r = set_rx_filter(mac);
- if (r)
- dev_err(zd_mac_dev(mac), "set_rx_filter_handler error %d\n", r);
+ spin_lock_irqsave(&mac->lock, flags);
+ int_status = le16_to_cpu(*(__le16 *)(mac->intr_buffer + 4));
+ spin_unlock_irqrestore(&mac->lock, flags);
+
+ if (int_status & INT_CFG_NEXT_BCN) {
+ /*dev_dbg_f_limit(zd_mac_dev(mac), "INT_CFG_NEXT_BCN\n");*/
+ zd_beacon_done(mac);
+ } else {
+ dev_dbg_f(zd_mac_dev(mac), "Unsupported interrupt\n");
+ }
+
+ zd_chip_enable_hwint(&mac->chip);
}
+
static u64 zd_op_prepare_multicast(struct ieee80211_hw *hw,
struct netdev_hw_addr_list *mc_list)
{
@@ -979,6 +1156,7 @@ static void zd_op_configure_filter(struct ieee80211_hw *hw,
};
struct zd_mac *mac = zd_hw_mac(hw);
unsigned long flags;
+ int r;
/* Only deal with supported flags */
changed_flags &= SUPPORTED_FIF_FLAGS;
@@ -1000,11 +1178,13 @@ static void zd_op_configure_filter(struct ieee80211_hw *hw,
mac->multicast_hash = hash;
spin_unlock_irqrestore(&mac->lock, flags);
- /* XXX: these can be called here now, can sleep now! */
- queue_work(zd_workqueue, &mac->set_multicast_hash_work);
+ zd_chip_set_multicast_hash(&mac->chip, &hash);
- if (changed_flags & FIF_CONTROL)
- queue_work(zd_workqueue, &mac->set_rx_filter_work);
+ if (changed_flags & FIF_CONTROL) {
+ r = set_rx_filter(mac);
+ if (r)
+ dev_err(zd_mac_dev(mac), "set_rx_filter error %d\n", r);
+ }
/* no handling required for FIF_OTHER_BSS as we don't currently
* do BSSID filtering */
@@ -1016,20 +1196,9 @@ static void zd_op_configure_filter(struct ieee80211_hw *hw,
* time. */
}
-static void set_rts_cts_work(struct work_struct *work)
+static void set_rts_cts(struct zd_mac *mac, unsigned int short_preamble)
{
- struct zd_mac *mac =
- container_of(work, struct zd_mac, set_rts_cts_work);
- unsigned long flags;
- unsigned int short_preamble;
-
mutex_lock(&mac->chip.mutex);
-
- spin_lock_irqsave(&mac->lock, flags);
- mac->updating_rts_rate = 0;
- short_preamble = mac->short_preamble;
- spin_unlock_irqrestore(&mac->lock, flags);
-
zd_chip_set_rts_cts_rate_locked(&mac->chip, short_preamble);
mutex_unlock(&mac->chip.mutex);
}
@@ -1040,33 +1209,42 @@ static void zd_op_bss_info_changed(struct ieee80211_hw *hw,
u32 changes)
{
struct zd_mac *mac = zd_hw_mac(hw);
- unsigned long flags;
int associated;
dev_dbg_f(zd_mac_dev(mac), "changes: %x\n", changes);
if (mac->type == NL80211_IFTYPE_MESH_POINT ||
- mac->type == NL80211_IFTYPE_ADHOC) {
+ mac->type == NL80211_IFTYPE_ADHOC ||
+ mac->type == NL80211_IFTYPE_AP) {
associated = true;
if (changes & BSS_CHANGED_BEACON) {
struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
if (beacon) {
+ zd_chip_disable_hwint(&mac->chip);
zd_mac_config_beacon(hw, beacon);
+ zd_chip_enable_hwint(&mac->chip);
kfree_skb(beacon);
}
}
if (changes & BSS_CHANGED_BEACON_ENABLED) {
- u32 interval;
+ u16 interval = 0;
+ u8 period = 0;
- if (bss_conf->enable_beacon)
- interval = BCN_MODE_IBSS |
- bss_conf->beacon_int;
- else
- interval = 0;
+ if (bss_conf->enable_beacon) {
+ period = bss_conf->dtim_period;
+ interval = bss_conf->beacon_int;
+ }
- zd_set_beacon_interval(&mac->chip, interval);
+ spin_lock_irq(&mac->lock);
+ mac->beacon.period = period;
+ mac->beacon.interval = interval;
+ mac->beacon.last_update = jiffies;
+ spin_unlock_irq(&mac->lock);
+
+ zd_set_beacon_interval(&mac->chip, interval, period,
+ mac->type);
}
} else
associated = is_valid_ether_addr(bss_conf->bssid);
@@ -1078,15 +1256,11 @@ static void zd_op_bss_info_changed(struct ieee80211_hw *hw,
/* TODO: do hardware bssid filtering */
if (changes & BSS_CHANGED_ERP_PREAMBLE) {
- spin_lock_irqsave(&mac->lock, flags);
+ spin_lock_irq(&mac->lock);
mac->short_preamble = bss_conf->use_short_preamble;
- if (!mac->updating_rts_rate) {
- mac->updating_rts_rate = 1;
- /* FIXME: should disable TX here, until work has
- * completed and RTS_CTS reg is updated */
- queue_work(zd_workqueue, &mac->set_rts_cts_work);
- }
- spin_unlock_irqrestore(&mac->lock, flags);
+ spin_unlock_irq(&mac->lock);
+
+ set_rts_cts(mac, bss_conf->use_short_preamble);
}
}
@@ -1138,12 +1312,14 @@ struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band;
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
- IEEE80211_HW_SIGNAL_UNSPEC;
+ IEEE80211_HW_SIGNAL_UNSPEC |
+ IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_MESH_POINT) |
BIT(NL80211_IFTYPE_STATION) |
- BIT(NL80211_IFTYPE_ADHOC);
+ BIT(NL80211_IFTYPE_ADHOC) |
+ BIT(NL80211_IFTYPE_AP);
hw->max_signal = 100;
hw->queues = 1;
@@ -1160,15 +1336,82 @@ struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
zd_chip_init(&mac->chip, hw, intf);
housekeeping_init(mac);
- INIT_WORK(&mac->set_multicast_hash_work, set_multicast_hash_handler);
- INIT_WORK(&mac->set_rts_cts_work, set_rts_cts_work);
- INIT_WORK(&mac->set_rx_filter_work, set_rx_filter_handler);
+ beacon_init(mac);
INIT_WORK(&mac->process_intr, zd_process_intr);
SET_IEEE80211_DEV(hw, &intf->dev);
return hw;
}
+#define BEACON_WATCHDOG_DELAY round_jiffies_relative(HZ)
+
+static void beacon_watchdog_handler(struct work_struct *work)
+{
+ struct zd_mac *mac =
+ container_of(work, struct zd_mac, beacon.watchdog_work.work);
+ struct sk_buff *beacon;
+ unsigned long timeout;
+ int interval, period;
+
+ if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
+ goto rearm;
+ if (mac->type != NL80211_IFTYPE_AP || !mac->vif)
+ goto rearm;
+
+ spin_lock_irq(&mac->lock);
+ interval = mac->beacon.interval;
+ period = mac->beacon.period;
+ timeout = mac->beacon.last_update + msecs_to_jiffies(interval) + HZ;
+ spin_unlock_irq(&mac->lock);
+
+ if (interval > 0 && time_is_before_jiffies(timeout)) {
+ dev_dbg_f(zd_mac_dev(mac), "beacon interrupt stalled, "
+ "restarting. "
+ "(interval: %d, dtim: %d)\n",
+ interval, period);
+
+ zd_chip_disable_hwint(&mac->chip);
+
+ beacon = ieee80211_beacon_get(mac->hw, mac->vif);
+ if (beacon) {
+ zd_mac_config_beacon(mac->hw, beacon);
+ kfree_skb(beacon);
+ }
+
+ zd_set_beacon_interval(&mac->chip, interval, period, mac->type);
+
+ zd_chip_enable_hwint(&mac->chip);
+
+ spin_lock_irq(&mac->lock);
+ mac->beacon.last_update = jiffies;
+ spin_unlock_irq(&mac->lock);
+ }
+
+rearm:
+ queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work,
+ BEACON_WATCHDOG_DELAY);
+}
+
+static void beacon_init(struct zd_mac *mac)
+{
+ INIT_DELAYED_WORK(&mac->beacon.watchdog_work, beacon_watchdog_handler);
+}
+
+static void beacon_enable(struct zd_mac *mac)
+{
+ dev_dbg_f(zd_mac_dev(mac), "\n");
+
+ mac->beacon.last_update = jiffies;
+ queue_delayed_work(zd_workqueue, &mac->beacon.watchdog_work,
+ BEACON_WATCHDOG_DELAY);
+}
+
+static void beacon_disable(struct zd_mac *mac)
+{
+ dev_dbg_f(zd_mac_dev(mac), "\n");
+ cancel_delayed_work_sync(&mac->beacon.watchdog_work);
+}
+
#define LINK_LED_WORK_DELAY HZ
static void link_led_handler(struct work_struct *work)
@@ -1179,6 +1422,9 @@ static void link_led_handler(struct work_struct *work)
int is_associated;
int r;
+ if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
+ goto requeue;
+
spin_lock_irq(&mac->lock);
is_associated = mac->associated;
spin_unlock_irq(&mac->lock);
@@ -1188,6 +1434,7 @@ static void link_led_handler(struct work_struct *work)
if (r)
dev_dbg_f(zd_mac_dev(mac), "zd_chip_control_leds error %d\n", r);
+requeue:
queue_delayed_work(zd_workqueue, &mac->housekeeping.link_led_work,
LINK_LED_WORK_DELAY);
}
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.h b/drivers/net/wireless/zd1211rw/zd_mac.h
index a6d86b996c79..f8c93c3fe755 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.h
+++ b/drivers/net/wireless/zd1211rw/zd_mac.h
@@ -163,6 +163,17 @@ struct housekeeping {
struct delayed_work link_led_work;
};
+struct beacon {
+ struct delayed_work watchdog_work;
+ unsigned long last_update;
+ u16 interval;
+ u8 period;
+};
+
+enum zd_device_flags {
+ ZD_DEVICE_RUNNING,
+};
+
#define ZD_MAC_STATS_BUFFER_SIZE 16
#define ZD_MAC_MAX_ACK_WAITERS 50
@@ -172,17 +183,19 @@ struct zd_mac {
spinlock_t lock;
spinlock_t intr_lock;
struct ieee80211_hw *hw;
+ struct ieee80211_vif *vif;
struct housekeeping housekeeping;
- struct work_struct set_multicast_hash_work;
+ struct beacon beacon;
struct work_struct set_rts_cts_work;
- struct work_struct set_rx_filter_work;
struct work_struct process_intr;
struct zd_mc_hash multicast_hash;
u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
u8 regdomain;
u8 default_regdomain;
+ u8 channel;
int type;
int associated;
+ unsigned long flags;
struct sk_buff_head ack_wait_queue;
struct ieee80211_channel channels[14];
struct ieee80211_rate rates[12];
@@ -191,9 +204,6 @@ struct zd_mac {
/* Short preamble (used for RTS/CTS) */
unsigned int short_preamble:1;
- /* flags to indicate update in progress */
- unsigned int updating_rts_rate:1;
-
/* whether to pass frames with CRC errors to stack */
unsigned int pass_failed_fcs:1;
@@ -304,6 +314,10 @@ int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length);
void zd_mac_tx_failed(struct urb *urb);
void zd_mac_tx_to_dev(struct sk_buff *skb, int error);
+int zd_op_start(struct ieee80211_hw *hw);
+void zd_op_stop(struct ieee80211_hw *hw);
+int zd_restore_settings(struct zd_mac *mac);
+
#ifdef DEBUG
void zd_dump_rx_status(const struct rx_status *status);
#else
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c
index 06041cb1c422..81e80489a052 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.c
+++ b/drivers/net/wireless/zd1211rw/zd_usb.c
@@ -377,8 +377,10 @@ static inline void handle_regs_int(struct urb *urb)
int_num = le16_to_cpu(*(__le16 *)(urb->transfer_buffer+2));
if (int_num == CR_INTERRUPT) {
struct zd_mac *mac = zd_hw_mac(zd_usb_to_hw(urb->context));
+ spin_lock(&mac->lock);
memcpy(&mac->intr_buffer, urb->transfer_buffer,
USB_MAX_EP_INT_BUFFER);
+ spin_unlock(&mac->lock);
schedule_work(&mac->process_intr);
} else if (intr->read_regs_enabled) {
intr->read_regs.length = len = urb->actual_length;
@@ -409,8 +411,10 @@ static void int_urb_complete(struct urb *urb)
case -ENOENT:
case -ECONNRESET:
case -EPIPE:
- goto kfree;
+ dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
+ return;
default:
+ dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
goto resubmit;
}
@@ -441,12 +445,11 @@ static void int_urb_complete(struct urb *urb)
resubmit:
r = usb_submit_urb(urb, GFP_ATOMIC);
if (r) {
- dev_dbg_f(urb_dev(urb), "resubmit urb %p\n", urb);
- goto kfree;
+ dev_dbg_f(urb_dev(urb), "error: resubmit urb %p err code %d\n",
+ urb, r);
+ /* TODO: add worker to reset intr->urb */
}
return;
-kfree:
- kfree(urb->transfer_buffer);
}
static inline int int_urb_interval(struct usb_device *udev)
@@ -477,9 +480,8 @@ static inline int usb_int_enabled(struct zd_usb *usb)
int zd_usb_enable_int(struct zd_usb *usb)
{
int r;
- struct usb_device *udev;
+ struct usb_device *udev = zd_usb_to_usbdev(usb);
struct zd_usb_interrupt *intr = &usb->intr;
- void *transfer_buffer = NULL;
struct urb *urb;
dev_dbg_f(zd_usb_dev(usb), "\n");
@@ -500,20 +502,21 @@ int zd_usb_enable_int(struct zd_usb *usb)
intr->urb = urb;
spin_unlock_irq(&intr->lock);
- /* TODO: make it a DMA buffer */
r = -ENOMEM;
- transfer_buffer = kmalloc(USB_MAX_EP_INT_BUFFER, GFP_KERNEL);
- if (!transfer_buffer) {
+ intr->buffer = usb_alloc_coherent(udev, USB_MAX_EP_INT_BUFFER,
+ GFP_KERNEL, &intr->buffer_dma);
+ if (!intr->buffer) {
dev_dbg_f(zd_usb_dev(usb),
"couldn't allocate transfer_buffer\n");
goto error_set_urb_null;
}
- udev = zd_usb_to_usbdev(usb);
usb_fill_int_urb(urb, udev, usb_rcvintpipe(udev, EP_INT_IN),
- transfer_buffer, USB_MAX_EP_INT_BUFFER,
+ intr->buffer, USB_MAX_EP_INT_BUFFER,
int_urb_complete, usb,
intr->interval);
+ urb->transfer_dma = intr->buffer_dma;
+ urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
dev_dbg_f(zd_usb_dev(usb), "submit urb %p\n", intr->urb);
r = usb_submit_urb(urb, GFP_KERNEL);
@@ -525,7 +528,8 @@ int zd_usb_enable_int(struct zd_usb *usb)
return 0;
error:
- kfree(transfer_buffer);
+ usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
+ intr->buffer, intr->buffer_dma);
error_set_urb_null:
spin_lock_irq(&intr->lock);
intr->urb = NULL;
@@ -539,8 +543,11 @@ out:
void zd_usb_disable_int(struct zd_usb *usb)
{
unsigned long flags;
+ struct usb_device *udev = zd_usb_to_usbdev(usb);
struct zd_usb_interrupt *intr = &usb->intr;
struct urb *urb;
+ void *buffer;
+ dma_addr_t buffer_dma;
spin_lock_irqsave(&intr->lock, flags);
urb = intr->urb;
@@ -549,11 +556,18 @@ void zd_usb_disable_int(struct zd_usb *usb)
return;
}
intr->urb = NULL;
+ buffer = intr->buffer;
+ buffer_dma = intr->buffer_dma;
+ intr->buffer = NULL;
spin_unlock_irqrestore(&intr->lock, flags);
usb_kill_urb(urb);
dev_dbg_f(zd_usb_dev(usb), "urb %p killed\n", urb);
usb_free_urb(urb);
+
+ if (buffer)
+ usb_free_coherent(udev, USB_MAX_EP_INT_BUFFER,
+ buffer, buffer_dma);
}
static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
@@ -601,6 +615,7 @@ static void handle_rx_packet(struct zd_usb *usb, const u8 *buffer,
static void rx_urb_complete(struct urb *urb)
{
+ int r;
struct zd_usb *usb;
struct zd_usb_rx *rx;
const u8 *buffer;
@@ -615,6 +630,7 @@ static void rx_urb_complete(struct urb *urb)
case -ENOENT:
case -ECONNRESET:
case -EPIPE:
+ dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
return;
default:
dev_dbg_f(urb_dev(urb), "urb %p error %d\n", urb, urb->status);
@@ -626,6 +642,8 @@ static void rx_urb_complete(struct urb *urb)
usb = urb->context;
rx = &usb->rx;
+ zd_usb_reset_rx_idle_timer(usb);
+
if (length%rx->usb_packet_size > rx->usb_packet_size-4) {
/* If there is an old first fragment, we don't care. */
dev_dbg_f(urb_dev(urb), "*** first fragment ***\n");
@@ -654,7 +672,9 @@ static void rx_urb_complete(struct urb *urb)
}
resubmit:
- usb_submit_urb(urb, GFP_ATOMIC);
+ r = usb_submit_urb(urb, GFP_ATOMIC);
+ if (r)
+ dev_dbg_f(urb_dev(urb), "urb %p resubmit error %d\n", urb, r);
}
static struct urb *alloc_rx_urb(struct zd_usb *usb)
@@ -690,7 +710,7 @@ static void free_rx_urb(struct urb *urb)
usb_free_urb(urb);
}
-int zd_usb_enable_rx(struct zd_usb *usb)
+static int __zd_usb_enable_rx(struct zd_usb *usb)
{
int i, r;
struct zd_usb_rx *rx = &usb->rx;
@@ -742,7 +762,21 @@ error:
return r;
}
-void zd_usb_disable_rx(struct zd_usb *usb)
+int zd_usb_enable_rx(struct zd_usb *usb)
+{
+ int r;
+ struct zd_usb_rx *rx = &usb->rx;
+
+ mutex_lock(&rx->setup_mutex);
+ r = __zd_usb_enable_rx(usb);
+ mutex_unlock(&rx->setup_mutex);
+
+ zd_usb_reset_rx_idle_timer(usb);
+
+ return r;
+}
+
+static void __zd_usb_disable_rx(struct zd_usb *usb)
{
int i;
unsigned long flags;
@@ -769,6 +803,40 @@ void zd_usb_disable_rx(struct zd_usb *usb)
spin_unlock_irqrestore(&rx->lock, flags);
}
+void zd_usb_disable_rx(struct zd_usb *usb)
+{
+ struct zd_usb_rx *rx = &usb->rx;
+
+ mutex_lock(&rx->setup_mutex);
+ __zd_usb_disable_rx(usb);
+ mutex_unlock(&rx->setup_mutex);
+
+ cancel_delayed_work_sync(&rx->idle_work);
+}
+
+static void zd_usb_reset_rx(struct zd_usb *usb)
+{
+ bool do_reset;
+ struct zd_usb_rx *rx = &usb->rx;
+ unsigned long flags;
+
+ mutex_lock(&rx->setup_mutex);
+
+ spin_lock_irqsave(&rx->lock, flags);
+ do_reset = rx->urbs != NULL;
+ spin_unlock_irqrestore(&rx->lock, flags);
+
+ if (do_reset) {
+ __zd_usb_disable_rx(usb);
+ __zd_usb_enable_rx(usb);
+ }
+
+ mutex_unlock(&rx->setup_mutex);
+
+ if (do_reset)
+ zd_usb_reset_rx_idle_timer(usb);
+}
+
/**
* zd_usb_disable_tx - disable transmission
* @usb: the zd1211rw-private USB structure
@@ -779,19 +847,21 @@ void zd_usb_disable_tx(struct zd_usb *usb)
{
struct zd_usb_tx *tx = &usb->tx;
unsigned long flags;
- struct list_head *pos, *n;
+
+ atomic_set(&tx->enabled, 0);
+
+ /* kill all submitted tx-urbs */
+ usb_kill_anchored_urbs(&tx->submitted);
spin_lock_irqsave(&tx->lock, flags);
- list_for_each_safe(pos, n, &tx->free_urb_list) {
- list_del(pos);
- usb_free_urb(list_entry(pos, struct urb, urb_list));
- }
- tx->enabled = 0;
+ WARN_ON(!skb_queue_empty(&tx->submitted_skbs));
+ WARN_ON(tx->submitted_urbs != 0);
tx->submitted_urbs = 0;
+ spin_unlock_irqrestore(&tx->lock, flags);
+
/* The stopped state is ignored, relying on ieee80211_wake_queues()
* in a potentionally following zd_usb_enable_tx().
*/
- spin_unlock_irqrestore(&tx->lock, flags);
}
/**
@@ -807,63 +877,13 @@ void zd_usb_enable_tx(struct zd_usb *usb)
struct zd_usb_tx *tx = &usb->tx;
spin_lock_irqsave(&tx->lock, flags);
- tx->enabled = 1;
+ atomic_set(&tx->enabled, 1);
tx->submitted_urbs = 0;
ieee80211_wake_queues(zd_usb_to_hw(usb));
tx->stopped = 0;
spin_unlock_irqrestore(&tx->lock, flags);
}
-/**
- * alloc_tx_urb - provides an tx URB
- * @usb: a &struct zd_usb pointer
- *
- * Allocates a new URB. If possible takes the urb from the free list in
- * usb->tx.
- */
-static struct urb *alloc_tx_urb(struct zd_usb *usb)
-{
- struct zd_usb_tx *tx = &usb->tx;
- unsigned long flags;
- struct list_head *entry;
- struct urb *urb;
-
- spin_lock_irqsave(&tx->lock, flags);
- if (list_empty(&tx->free_urb_list)) {
- urb = usb_alloc_urb(0, GFP_ATOMIC);
- goto out;
- }
- entry = tx->free_urb_list.next;
- list_del(entry);
- urb = list_entry(entry, struct urb, urb_list);
-out:
- spin_unlock_irqrestore(&tx->lock, flags);
- return urb;
-}
-
-/**
- * free_tx_urb - frees a used tx URB
- * @usb: a &struct zd_usb pointer
- * @urb: URB to be freed
- *
- * Frees the transmission URB, which means to put it on the free URB
- * list.
- */
-static void free_tx_urb(struct zd_usb *usb, struct urb *urb)
-{
- struct zd_usb_tx *tx = &usb->tx;
- unsigned long flags;
-
- spin_lock_irqsave(&tx->lock, flags);
- if (!tx->enabled) {
- usb_free_urb(urb);
- goto out;
- }
- list_add(&urb->urb_list, &tx->free_urb_list);
-out:
- spin_unlock_irqrestore(&tx->lock, flags);
-}
-
static void tx_dec_submitted_urbs(struct zd_usb *usb)
{
struct zd_usb_tx *tx = &usb->tx;
@@ -905,6 +925,16 @@ static void tx_urb_complete(struct urb *urb)
struct sk_buff *skb;
struct ieee80211_tx_info *info;
struct zd_usb *usb;
+ struct zd_usb_tx *tx;
+
+ skb = (struct sk_buff *)urb->context;
+ info = IEEE80211_SKB_CB(skb);
+ /*
+ * grab 'usb' pointer before handing off the skb (since
+ * it might be freed by zd_mac_tx_to_dev or mac80211)
+ */
+ usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
+ tx = &usb->tx;
switch (urb->status) {
case 0:
@@ -922,20 +952,16 @@ static void tx_urb_complete(struct urb *urb)
goto resubmit;
}
free_urb:
- skb = (struct sk_buff *)urb->context;
- /*
- * grab 'usb' pointer before handing off the skb (since
- * it might be freed by zd_mac_tx_to_dev or mac80211)
- */
- info = IEEE80211_SKB_CB(skb);
- usb = &zd_hw_mac(info->rate_driver_data[0])->chip.usb;
+ skb_unlink(skb, &usb->tx.submitted_skbs);
zd_mac_tx_to_dev(skb, urb->status);
- free_tx_urb(usb, urb);
+ usb_free_urb(urb);
tx_dec_submitted_urbs(usb);
return;
resubmit:
+ usb_anchor_urb(urb, &tx->submitted);
r = usb_submit_urb(urb, GFP_ATOMIC);
if (r) {
+ usb_unanchor_urb(urb);
dev_dbg_f(urb_dev(urb), "error resubmit urb %p %d\n", urb, r);
goto free_urb;
}
@@ -956,10 +982,17 @@ resubmit:
int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
{
int r;
+ struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct usb_device *udev = zd_usb_to_usbdev(usb);
struct urb *urb;
+ struct zd_usb_tx *tx = &usb->tx;
+
+ if (!atomic_read(&tx->enabled)) {
+ r = -ENOENT;
+ goto out;
+ }
- urb = alloc_tx_urb(usb);
+ urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
r = -ENOMEM;
goto out;
@@ -968,17 +1001,118 @@ int zd_usb_tx(struct zd_usb *usb, struct sk_buff *skb)
usb_fill_bulk_urb(urb, udev, usb_sndbulkpipe(udev, EP_DATA_OUT),
skb->data, skb->len, tx_urb_complete, skb);
+ info->rate_driver_data[1] = (void *)jiffies;
+ skb_queue_tail(&tx->submitted_skbs, skb);
+ usb_anchor_urb(urb, &tx->submitted);
+
r = usb_submit_urb(urb, GFP_ATOMIC);
- if (r)
+ if (r) {
+ dev_dbg_f(zd_usb_dev(usb), "error submit urb %p %d\n", urb, r);
+ usb_unanchor_urb(urb);
+ skb_unlink(skb, &tx->submitted_skbs);
goto error;
+ }
tx_inc_submitted_urbs(usb);
return 0;
error:
- free_tx_urb(usb, urb);
+ usb_free_urb(urb);
out:
return r;
}
+static bool zd_tx_timeout(struct zd_usb *usb)
+{
+ struct zd_usb_tx *tx = &usb->tx;
+ struct sk_buff_head *q = &tx->submitted_skbs;
+ struct sk_buff *skb, *skbnext;
+ struct ieee80211_tx_info *info;
+ unsigned long flags, trans_start;
+ bool have_timedout = false;
+
+ spin_lock_irqsave(&q->lock, flags);
+ skb_queue_walk_safe(q, skb, skbnext) {
+ info = IEEE80211_SKB_CB(skb);
+ trans_start = (unsigned long)info->rate_driver_data[1];
+
+ if (time_is_before_jiffies(trans_start + ZD_TX_TIMEOUT)) {
+ have_timedout = true;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&q->lock, flags);
+
+ return have_timedout;
+}
+
+static void zd_tx_watchdog_handler(struct work_struct *work)
+{
+ struct zd_usb *usb =
+ container_of(work, struct zd_usb, tx.watchdog_work.work);
+ struct zd_usb_tx *tx = &usb->tx;
+
+ if (!atomic_read(&tx->enabled) || !tx->watchdog_enabled)
+ goto out;
+ if (!zd_tx_timeout(usb))
+ goto out;
+
+ /* TX halted, try reset */
+ dev_warn(zd_usb_dev(usb), "TX-stall detected, reseting device...");
+
+ usb_queue_reset_device(usb->intf);
+
+ /* reset will stop this worker, don't rearm */
+ return;
+out:
+ queue_delayed_work(zd_workqueue, &tx->watchdog_work,
+ ZD_TX_WATCHDOG_INTERVAL);
+}
+
+void zd_tx_watchdog_enable(struct zd_usb *usb)
+{
+ struct zd_usb_tx *tx = &usb->tx;
+
+ if (!tx->watchdog_enabled) {
+ dev_dbg_f(zd_usb_dev(usb), "\n");
+ queue_delayed_work(zd_workqueue, &tx->watchdog_work,
+ ZD_TX_WATCHDOG_INTERVAL);
+ tx->watchdog_enabled = 1;
+ }
+}
+
+void zd_tx_watchdog_disable(struct zd_usb *usb)
+{
+ struct zd_usb_tx *tx = &usb->tx;
+
+ if (tx->watchdog_enabled) {
+ dev_dbg_f(zd_usb_dev(usb), "\n");
+ tx->watchdog_enabled = 0;
+ cancel_delayed_work_sync(&tx->watchdog_work);
+ }
+}
+
+static void zd_rx_idle_timer_handler(struct work_struct *work)
+{
+ struct zd_usb *usb =
+ container_of(work, struct zd_usb, rx.idle_work.work);
+ struct zd_mac *mac = zd_usb_to_mac(usb);
+
+ if (!test_bit(ZD_DEVICE_RUNNING, &mac->flags))
+ return;
+
+ dev_dbg_f(zd_usb_dev(usb), "\n");
+
+ /* 30 seconds since last rx, reset rx */
+ zd_usb_reset_rx(usb);
+}
+
+void zd_usb_reset_rx_idle_timer(struct zd_usb *usb)
+{
+ struct zd_usb_rx *rx = &usb->rx;
+
+ cancel_delayed_work(&rx->idle_work);
+ queue_delayed_work(zd_workqueue, &rx->idle_work, ZD_RX_IDLE_INTERVAL);
+}
+
static inline void init_usb_interrupt(struct zd_usb *usb)
{
struct zd_usb_interrupt *intr = &usb->intr;
@@ -993,22 +1127,27 @@ static inline void init_usb_rx(struct zd_usb *usb)
{
struct zd_usb_rx *rx = &usb->rx;
spin_lock_init(&rx->lock);
+ mutex_init(&rx->setup_mutex);
if (interface_to_usbdev(usb->intf)->speed == USB_SPEED_HIGH) {
rx->usb_packet_size = 512;
} else {
rx->usb_packet_size = 64;
}
ZD_ASSERT(rx->fragment_length == 0);
+ INIT_DELAYED_WORK(&rx->idle_work, zd_rx_idle_timer_handler);
}
static inline void init_usb_tx(struct zd_usb *usb)
{
struct zd_usb_tx *tx = &usb->tx;
spin_lock_init(&tx->lock);
- tx->enabled = 0;
+ atomic_set(&tx->enabled, 0);
tx->stopped = 0;
- INIT_LIST_HEAD(&tx->free_urb_list);
+ skb_queue_head_init(&tx->submitted_skbs);
+ init_usb_anchor(&tx->submitted);
tx->submitted_urbs = 0;
+ tx->watchdog_enabled = 0;
+ INIT_DELAYED_WORK(&tx->watchdog_work, zd_tx_watchdog_handler);
}
void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
@@ -1017,6 +1156,7 @@ void zd_usb_init(struct zd_usb *usb, struct ieee80211_hw *hw,
memset(usb, 0, sizeof(*usb));
usb->intf = usb_get_intf(intf);
usb_set_intfdata(usb->intf, hw);
+ init_usb_anchor(&usb->submitted_cmds);
init_usb_interrupt(usb);
init_usb_tx(usb);
init_usb_rx(usb);
@@ -1240,6 +1380,7 @@ static void disconnect(struct usb_interface *intf)
ieee80211_unregister_hw(hw);
/* Just in case something has gone wrong! */
+ zd_usb_disable_tx(usb);
zd_usb_disable_rx(usb);
zd_usb_disable_int(usb);
@@ -1255,11 +1396,92 @@ static void disconnect(struct usb_interface *intf)
dev_dbg(&intf->dev, "disconnected\n");
}
+static void zd_usb_resume(struct zd_usb *usb)
+{
+ struct zd_mac *mac = zd_usb_to_mac(usb);
+ int r;
+
+ dev_dbg_f(zd_usb_dev(usb), "\n");
+
+ r = zd_op_start(zd_usb_to_hw(usb));
+ if (r < 0) {
+ dev_warn(zd_usb_dev(usb), "Device resume failed "
+ "with error code %d. Retrying...\n", r);
+ if (usb->was_running)
+ set_bit(ZD_DEVICE_RUNNING, &mac->flags);
+ usb_queue_reset_device(usb->intf);
+ return;
+ }
+
+ if (mac->type != NL80211_IFTYPE_UNSPECIFIED) {
+ r = zd_restore_settings(mac);
+ if (r < 0) {
+ dev_dbg(zd_usb_dev(usb),
+ "failed to restore settings, %d\n", r);
+ return;
+ }
+ }
+}
+
+static void zd_usb_stop(struct zd_usb *usb)
+{
+ dev_dbg_f(zd_usb_dev(usb), "\n");
+
+ zd_op_stop(zd_usb_to_hw(usb));
+
+ zd_usb_disable_tx(usb);
+ zd_usb_disable_rx(usb);
+ zd_usb_disable_int(usb);
+
+ usb->initialized = 0;
+}
+
+static int pre_reset(struct usb_interface *intf)
+{
+ struct ieee80211_hw *hw = usb_get_intfdata(intf);
+ struct zd_mac *mac;
+ struct zd_usb *usb;
+
+ if (!hw || intf->condition != USB_INTERFACE_BOUND)
+ return 0;
+
+ mac = zd_hw_mac(hw);
+ usb = &mac->chip.usb;
+
+ usb->was_running = test_bit(ZD_DEVICE_RUNNING, &mac->flags);
+
+ zd_usb_stop(usb);
+
+ mutex_lock(&mac->chip.mutex);
+ return 0;
+}
+
+static int post_reset(struct usb_interface *intf)
+{
+ struct ieee80211_hw *hw = usb_get_intfdata(intf);
+ struct zd_mac *mac;
+ struct zd_usb *usb;
+
+ if (!hw || intf->condition != USB_INTERFACE_BOUND)
+ return 0;
+
+ mac = zd_hw_mac(hw);
+ usb = &mac->chip.usb;
+
+ mutex_unlock(&mac->chip.mutex);
+
+ if (usb->was_running)
+ zd_usb_resume(usb);
+ return 0;
+}
+
static struct usb_driver driver = {
.name = KBUILD_MODNAME,
.id_table = usb_ids,
.probe = probe,
.disconnect = disconnect,
+ .pre_reset = pre_reset,
+ .post_reset = post_reset,
};
struct workqueue_struct *zd_workqueue;
@@ -1393,30 +1615,35 @@ int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
return -EWOULDBLOCK;
}
if (!usb_int_enabled(usb)) {
- dev_dbg_f(zd_usb_dev(usb),
+ dev_dbg_f(zd_usb_dev(usb),
"error: usb interrupt not enabled\n");
return -EWOULDBLOCK;
}
+ ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
+ BUILD_BUG_ON(sizeof(struct usb_req_read_regs) + USB_MAX_IOREAD16_COUNT *
+ sizeof(__le16) > sizeof(usb->req_buf));
+ BUG_ON(sizeof(struct usb_req_read_regs) + count * sizeof(__le16) >
+ sizeof(usb->req_buf));
+
req_len = sizeof(struct usb_req_read_regs) + count * sizeof(__le16);
- req = kmalloc(req_len, GFP_KERNEL);
- if (!req)
- return -ENOMEM;
+ req = (void *)usb->req_buf;
+
req->id = cpu_to_le16(USB_REQ_READ_REGS);
for (i = 0; i < count; i++)
req->addr[i] = cpu_to_le16((u16)addresses[i]);
udev = zd_usb_to_usbdev(usb);
prepare_read_regs_int(usb);
- r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
- req, req_len, &actual_req_len, 1000 /* ms */);
+ r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
+ req, req_len, &actual_req_len, 50 /* ms */);
if (r) {
dev_dbg_f(zd_usb_dev(usb),
- "error in usb_bulk_msg(). Error number %d\n", r);
+ "error in usb_interrupt_msg(). Error number %d\n", r);
goto error;
}
if (req_len != actual_req_len) {
- dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()\n"
+ dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()\n"
" req_len %d != actual_req_len %d\n",
req_len, actual_req_len);
r = -EIO;
@@ -1424,7 +1651,7 @@ int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
}
timeout = wait_for_completion_timeout(&usb->intr.read_regs.completion,
- msecs_to_jiffies(1000));
+ msecs_to_jiffies(50));
if (!timeout) {
disable_read_regs_int(usb);
dev_dbg_f(zd_usb_dev(usb), "read timed out\n");
@@ -1434,17 +1661,106 @@ int zd_usb_ioread16v(struct zd_usb *usb, u16 *values,
r = get_results(usb, values, req, count);
error:
- kfree(req);
return r;
}
-int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
- unsigned int count)
+static void iowrite16v_urb_complete(struct urb *urb)
+{
+ struct zd_usb *usb = urb->context;
+
+ if (urb->status && !usb->cmd_error)
+ usb->cmd_error = urb->status;
+}
+
+static int zd_submit_waiting_urb(struct zd_usb *usb, bool last)
+{
+ int r = 0;
+ struct urb *urb = usb->urb_async_waiting;
+
+ if (!urb)
+ return 0;
+
+ usb->urb_async_waiting = NULL;
+
+ if (!last)
+ urb->transfer_flags |= URB_NO_INTERRUPT;
+
+ usb_anchor_urb(urb, &usb->submitted_cmds);
+ r = usb_submit_urb(urb, GFP_KERNEL);
+ if (r) {
+ usb_unanchor_urb(urb);
+ dev_dbg_f(zd_usb_dev(usb),
+ "error in usb_submit_urb(). Error number %d\n", r);
+ goto error;
+ }
+
+ /* fall-through with r == 0 */
+error:
+ usb_free_urb(urb);
+ return r;
+}
+
+void zd_usb_iowrite16v_async_start(struct zd_usb *usb)
+{
+ ZD_ASSERT(usb_anchor_empty(&usb->submitted_cmds));
+ ZD_ASSERT(usb->urb_async_waiting == NULL);
+ ZD_ASSERT(!usb->in_async);
+
+ ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
+
+ usb->in_async = 1;
+ usb->cmd_error = 0;
+ usb->urb_async_waiting = NULL;
+}
+
+int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout)
+{
+ int r;
+
+ ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
+ ZD_ASSERT(usb->in_async);
+
+ /* Submit last iowrite16v URB */
+ r = zd_submit_waiting_urb(usb, true);
+ if (r) {
+ dev_dbg_f(zd_usb_dev(usb),
+ "error in zd_submit_waiting_usb(). "
+ "Error number %d\n", r);
+
+ usb_kill_anchored_urbs(&usb->submitted_cmds);
+ goto error;
+ }
+
+ if (timeout)
+ timeout = usb_wait_anchor_empty_timeout(&usb->submitted_cmds,
+ timeout);
+ if (!timeout) {
+ usb_kill_anchored_urbs(&usb->submitted_cmds);
+ if (usb->cmd_error == -ENOENT) {
+ dev_dbg_f(zd_usb_dev(usb), "timed out");
+ r = -ETIMEDOUT;
+ goto error;
+ }
+ }
+
+ r = usb->cmd_error;
+error:
+ usb->in_async = 0;
+ return r;
+}
+
+int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
+ unsigned int count)
{
int r;
struct usb_device *udev;
struct usb_req_write_regs *req = NULL;
- int i, req_len, actual_req_len;
+ int i, req_len;
+ struct urb *urb;
+ struct usb_host_endpoint *ep;
+
+ ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
+ ZD_ASSERT(usb->in_async);
if (count == 0)
return 0;
@@ -1460,11 +1776,23 @@ int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
return -EWOULDBLOCK;
}
+ udev = zd_usb_to_usbdev(usb);
+
+ ep = usb_pipe_endpoint(udev, usb_sndintpipe(udev, EP_REGS_OUT));
+ if (!ep)
+ return -ENOENT;
+
+ urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!urb)
+ return -ENOMEM;
+
req_len = sizeof(struct usb_req_write_regs) +
count * sizeof(struct reg_data);
req = kmalloc(req_len, GFP_KERNEL);
- if (!req)
- return -ENOMEM;
+ if (!req) {
+ r = -ENOMEM;
+ goto error;
+ }
req->id = cpu_to_le16(USB_REQ_WRITE_REGS);
for (i = 0; i < count; i++) {
@@ -1473,29 +1801,44 @@ int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
rw->value = cpu_to_le16(ioreqs[i].value);
}
- udev = zd_usb_to_usbdev(usb);
- r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
- req, req_len, &actual_req_len, 1000 /* ms */);
+ usb_fill_int_urb(urb, udev, usb_sndintpipe(udev, EP_REGS_OUT),
+ req, req_len, iowrite16v_urb_complete, usb,
+ ep->desc.bInterval);
+ urb->transfer_flags |= URB_FREE_BUFFER | URB_SHORT_NOT_OK;
+
+ /* Submit previous URB */
+ r = zd_submit_waiting_urb(usb, false);
if (r) {
dev_dbg_f(zd_usb_dev(usb),
- "error in usb_bulk_msg(). Error number %d\n", r);
- goto error;
- }
- if (req_len != actual_req_len) {
- dev_dbg_f(zd_usb_dev(usb),
- "error in usb_bulk_msg()"
- " req_len %d != actual_req_len %d\n",
- req_len, actual_req_len);
- r = -EIO;
+ "error in zd_submit_waiting_usb(). "
+ "Error number %d\n", r);
goto error;
}
- /* FALL-THROUGH with r == 0 */
+ /* Delay submit so that URB_NO_INTERRUPT flag can be set for all URBs
+ * of currect batch except for very last.
+ */
+ usb->urb_async_waiting = urb;
+ return 0;
error:
- kfree(req);
+ usb_free_urb(urb);
return r;
}
+int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
+ unsigned int count)
+{
+ int r;
+
+ zd_usb_iowrite16v_async_start(usb);
+ r = zd_usb_iowrite16v_async(usb, ioreqs, count);
+ if (r) {
+ zd_usb_iowrite16v_async_end(usb, 0);
+ return r;
+ }
+ return zd_usb_iowrite16v_async_end(usb, 50 /* ms */);
+}
+
int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
{
int r;
@@ -1537,14 +1880,19 @@ int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
if (r) {
dev_dbg_f(zd_usb_dev(usb),
"error %d: Couldn't read CR203\n", r);
- goto out;
+ return r;
}
bit_value_template &= ~(RF_IF_LE|RF_CLK|RF_DATA);
+ ZD_ASSERT(mutex_is_locked(&zd_usb_to_chip(usb)->mutex));
+ BUILD_BUG_ON(sizeof(struct usb_req_rfwrite) +
+ USB_MAX_RFWRITE_BIT_COUNT * sizeof(__le16) >
+ sizeof(usb->req_buf));
+ BUG_ON(sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16) >
+ sizeof(usb->req_buf));
+
req_len = sizeof(struct usb_req_rfwrite) + bits * sizeof(__le16);
- req = kmalloc(req_len, GFP_KERNEL);
- if (!req)
- return -ENOMEM;
+ req = (void *)usb->req_buf;
req->id = cpu_to_le16(USB_REQ_WRITE_RF);
/* 1: 3683a, but not used in ZYDAS driver */
@@ -1559,15 +1907,15 @@ int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
}
udev = zd_usb_to_usbdev(usb);
- r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, EP_REGS_OUT),
- req, req_len, &actual_req_len, 1000 /* ms */);
+ r = usb_interrupt_msg(udev, usb_sndintpipe(udev, EP_REGS_OUT),
+ req, req_len, &actual_req_len, 50 /* ms */);
if (r) {
dev_dbg_f(zd_usb_dev(usb),
- "error in usb_bulk_msg(). Error number %d\n", r);
+ "error in usb_interrupt_msg(). Error number %d\n", r);
goto out;
}
if (req_len != actual_req_len) {
- dev_dbg_f(zd_usb_dev(usb), "error in usb_bulk_msg()"
+ dev_dbg_f(zd_usb_dev(usb), "error in usb_interrupt_msg()"
" req_len %d != actual_req_len %d\n",
req_len, actual_req_len);
r = -EIO;
@@ -1576,6 +1924,5 @@ int zd_usb_rfwrite(struct zd_usb *usb, u32 value, u8 bits)
/* FALL-THROUGH with r == 0 */
out:
- kfree(req);
return r;
}
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.h b/drivers/net/wireless/zd1211rw/zd_usb.h
index 1b1655cb7cb4..b3df2c8116cc 100644
--- a/drivers/net/wireless/zd1211rw/zd_usb.h
+++ b/drivers/net/wireless/zd1211rw/zd_usb.h
@@ -32,6 +32,10 @@
#define ZD_USB_TX_HIGH 5
#define ZD_USB_TX_LOW 2
+#define ZD_TX_TIMEOUT (HZ * 5)
+#define ZD_TX_WATCHDOG_INTERVAL round_jiffies_relative(HZ)
+#define ZD_RX_IDLE_INTERVAL round_jiffies_relative(30 * HZ)
+
enum devicetype {
DEVICE_ZD1211 = 0,
DEVICE_ZD1211B = 1,
@@ -162,6 +166,8 @@ struct zd_usb_interrupt {
struct read_regs_int read_regs;
spinlock_t lock;
struct urb *urb;
+ void *buffer;
+ dma_addr_t buffer_dma;
int interval;
u8 read_regs_enabled:1;
};
@@ -175,7 +181,9 @@ static inline struct usb_int_regs *get_read_regs(struct zd_usb_interrupt *intr)
struct zd_usb_rx {
spinlock_t lock;
- u8 fragment[2*USB_MAX_RX_SIZE];
+ struct mutex setup_mutex;
+ struct delayed_work idle_work;
+ u8 fragment[2 * USB_MAX_RX_SIZE];
unsigned int fragment_length;
unsigned int usb_packet_size;
struct urb **urbs;
@@ -184,19 +192,21 @@ struct zd_usb_rx {
/**
* struct zd_usb_tx - structure used for transmitting frames
+ * @enabled: atomic enabled flag, indicates whether tx is enabled
* @lock: lock for transmission
- * @free_urb_list: list of free URBs, contains all the URBs, which can be used
+ * @submitted: anchor for URBs sent to device
* @submitted_urbs: atomic integer that counts the URBs having sent to the
* device, which haven't been completed
- * @enabled: enabled flag, indicates whether tx is enabled
* @stopped: indicates whether higher level tx queues are stopped
*/
struct zd_usb_tx {
+ atomic_t enabled;
spinlock_t lock;
- struct list_head free_urb_list;
+ struct delayed_work watchdog_work;
+ struct sk_buff_head submitted_skbs;
+ struct usb_anchor submitted;
int submitted_urbs;
- int enabled;
- int stopped;
+ u8 stopped:1, watchdog_enabled:1;
};
/* Contains the usb parts. The structure doesn't require a lock because intf
@@ -207,7 +217,11 @@ struct zd_usb {
struct zd_usb_rx rx;
struct zd_usb_tx tx;
struct usb_interface *intf;
- u8 is_zd1211b:1, initialized:1;
+ struct usb_anchor submitted_cmds;
+ struct urb *urb_async_waiting;
+ int cmd_error;
+ u8 req_buf[64]; /* zd_usb_iowrite16v needs 62 bytes */
+ u8 is_zd1211b:1, initialized:1, was_running:1, in_async:1;
};
#define zd_usb_dev(usb) (&usb->intf->dev)
@@ -234,12 +248,17 @@ void zd_usb_clear(struct zd_usb *usb);
int zd_usb_scnprint_id(struct zd_usb *usb, char *buffer, size_t size);
+void zd_tx_watchdog_enable(struct zd_usb *usb);
+void zd_tx_watchdog_disable(struct zd_usb *usb);
+
int zd_usb_enable_int(struct zd_usb *usb);
void zd_usb_disable_int(struct zd_usb *usb);
int zd_usb_enable_rx(struct zd_usb *usb);
void zd_usb_disable_rx(struct zd_usb *usb);
+void zd_usb_reset_rx_idle_timer(struct zd_usb *usb);
+
void zd_usb_enable_tx(struct zd_usb *usb);
void zd_usb_disable_tx(struct zd_usb *usb);
@@ -254,6 +273,10 @@ static inline int zd_usb_ioread16(struct zd_usb *usb, u16 *value,
return zd_usb_ioread16v(usb, value, (const zd_addr_t *)&addr, 1);
}
+void zd_usb_iowrite16v_async_start(struct zd_usb *usb);
+int zd_usb_iowrite16v_async_end(struct zd_usb *usb, unsigned int timeout);
+int zd_usb_iowrite16v_async(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
+ unsigned int count);
int zd_usb_iowrite16v(struct zd_usb *usb, const struct zd_ioreq16 *ioreqs,
unsigned int count);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-21 14:12:17 +0000