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path: root/drivers/net/wireless/rt2x00/rt73usb.c
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Diffstat (limited to 'drivers/net/wireless/rt2x00/rt73usb.c')
-rw-r--r--drivers/net/wireless/rt2x00/rt73usb.c126
1 files changed, 75 insertions, 51 deletions
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index efc18de16fa1..46b040bf62de 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -24,6 +24,7 @@
Supported chipsets: rt2571W & rt2671.
*/
+#include <linux/crc-itu-t.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
@@ -292,7 +293,8 @@ static void rt73usb_led_brightness(struct led_classdev *led_cdev,
if (in_atomic()) {
NOTICE(led->rt2x00dev,
- "Ignoring LED brightness command for led %d", led->type);
+ "Ignoring LED brightness command for led %d\n",
+ led->type);
return;
}
@@ -347,7 +349,6 @@ static void rt73usb_config_intf(struct rt2x00_dev *rt2x00dev,
* bits which (when set to 0) will invalidate the entire beacon.
*/
beacon_base = HW_BEACON_OFFSET(intf->beacon->entry_idx);
- rt73usb_register_write(rt2x00dev, TXRX_CSR9, 0);
rt73usb_register_write(rt2x00dev, beacon_base, 0);
/*
@@ -355,10 +356,8 @@ static void rt73usb_config_intf(struct rt2x00_dev *rt2x00dev,
*/
rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 1);
- rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE,
- (conf->sync == TSF_SYNC_BEACON));
- rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 0);
rt2x00_set_field32(&reg, TXRX_CSR9_TSF_SYNC, conf->sync);
+ rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 1);
rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
}
@@ -381,10 +380,8 @@ static void rt73usb_config_intf(struct rt2x00_dev *rt2x00dev,
}
}
-static int rt73usb_config_preamble(struct rt2x00_dev *rt2x00dev,
- const int short_preamble,
- const int ack_timeout,
- const int ack_consume_time)
+static int rt73usb_config_erp(struct rt2x00_dev *rt2x00dev,
+ struct rt2x00lib_erp *erp)
{
u32 reg;
@@ -396,12 +393,12 @@ static int rt73usb_config_preamble(struct rt2x00_dev *rt2x00dev,
return -EAGAIN;
rt73usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
- rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, ack_timeout);
+ rt2x00_set_field32(&reg, TXRX_CSR0_RX_ACK_TIMEOUT, erp->ack_timeout);
rt73usb_register_write(rt2x00dev, TXRX_CSR0, reg);
rt73usb_register_read(rt2x00dev, TXRX_CSR4, &reg);
rt2x00_set_field32(&reg, TXRX_CSR4_AUTORESPOND_PREAMBLE,
- !!short_preamble);
+ !!erp->short_preamble);
rt73usb_register_write(rt2x00dev, TXRX_CSR4, reg);
return 0;
@@ -500,14 +497,8 @@ static void rt73usb_config_antenna_5x(struct rt2x00_dev *rt2x00dev,
else
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 3);
break;
- case ANTENNA_SW_DIVERSITY:
- /*
- * NOTE: We should never come here because rt2x00lib is
- * supposed to catch this and send us the correct antenna
- * explicitely. However we are nog going to bug about this.
- * Instead, just default to antenna B.
- */
case ANTENNA_B:
+ default:
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
rt2x00_set_field8(&r4, BBP_R4_RX_FRAME_END, 0);
if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ)
@@ -548,14 +539,8 @@ static void rt73usb_config_antenna_2x(struct rt2x00_dev *rt2x00dev,
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 3);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
break;
- case ANTENNA_SW_DIVERSITY:
- /*
- * NOTE: We should never come here because rt2x00lib is
- * supposed to catch this and send us the correct antenna
- * explicitely. However we are nog going to bug about this.
- * Instead, just default to antenna B.
- */
case ANTENNA_B:
+ default:
rt2x00_set_field8(&r77, BBP_R77_RX_ANTENNA, 0);
rt2x00_set_field8(&r4, BBP_R4_RX_ANTENNA_CONTROL, 1);
break;
@@ -605,6 +590,13 @@ static void rt73usb_config_antenna(struct rt2x00_dev *rt2x00dev,
unsigned int i;
u32 reg;
+ /*
+ * We should never come here because rt2x00lib is supposed
+ * to catch this and send us the correct antenna explicitely.
+ */
+ BUG_ON(ant->rx == ANTENNA_SW_DIVERSITY ||
+ ant->tx == ANTENNA_SW_DIVERSITY);
+
if (rt2x00dev->curr_band == IEEE80211_BAND_5GHZ) {
sel = antenna_sel_a;
lna = test_bit(CONFIG_EXTERNAL_LNA_A, &rt2x00dev->flags);
@@ -821,16 +813,30 @@ dynamic_cca_tune:
}
/*
- * Firmware name function.
+ * Firmware functions
*/
static char *rt73usb_get_firmware_name(struct rt2x00_dev *rt2x00dev)
{
return FIRMWARE_RT2571;
}
-/*
- * Initialization functions.
- */
+static u16 rt73usb_get_firmware_crc(void *data, const size_t len)
+{
+ u16 crc;
+
+ /*
+ * Use the crc itu-t algorithm.
+ * The last 2 bytes in the firmware array are the crc checksum itself,
+ * this means that we should never pass those 2 bytes to the crc
+ * algorithm.
+ */
+ crc = crc_itu_t(0, data, len - 2);
+ crc = crc_itu_t_byte(crc, 0);
+ crc = crc_itu_t_byte(crc, 0);
+
+ return crc;
+}
+
static int rt73usb_load_firmware(struct rt2x00_dev *rt2x00dev, void *data,
const size_t len)
{
@@ -900,6 +906,9 @@ static int rt73usb_load_firmware(struct rt2x00_dev *rt2x00dev, void *data,
return 0;
}
+/*
+ * Initialization functions.
+ */
static int rt73usb_init_registers(struct rt2x00_dev *rt2x00dev)
{
u32 reg;
@@ -1312,6 +1321,8 @@ static void rt73usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
if (!rt2x00_get_field32(reg, TXRX_CSR9_BEACON_GEN)) {
+ rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 1);
+ rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 1);
rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 1);
rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
}
@@ -1370,12 +1381,21 @@ static void rt73usb_fill_rxdone(struct queue_entry *entry,
{
struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
__le32 *rxd = (__le32 *)entry->skb->data;
- struct ieee80211_hdr *hdr =
- (struct ieee80211_hdr *)entry->skb->data + entry->queue->desc_size;
- int header_size = ieee80211_get_hdrlen(le16_to_cpu(hdr->frame_control));
+ unsigned int offset = entry->queue->desc_size + 2;
u32 word0;
u32 word1;
+ /*
+ * Copy descriptor to the available headroom inside the skbuffer.
+ */
+ skb_push(entry->skb, offset);
+ memcpy(entry->skb->data, rxd, entry->queue->desc_size);
+ rxd = (__le32 *)entry->skb->data;
+
+ /*
+ * The descriptor is now aligned to 4 bytes and thus it is
+ * now safe to read it on all architectures.
+ */
rt2x00_desc_read(rxd, 0, &word0);
rt2x00_desc_read(rxd, 1, &word1);
@@ -1385,37 +1405,30 @@ static void rt73usb_fill_rxdone(struct queue_entry *entry,
/*
* Obtain the status about this packet.
+ * When frame was received with an OFDM bitrate,
+ * the signal is the PLCP value. If it was received with
+ * a CCK bitrate the signal is the rate in 100kbit/s.
*/
+ rxdesc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
rxdesc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
+ rxdesc->signal_plcp = rxdesc->ofdm;
rxdesc->rssi = rt73usb_agc_to_rssi(entry->queue->rt2x00dev, word1);
- rxdesc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
/*
- * The data behind the ieee80211 header must be
- * aligned on a 4 byte boundary.
+ * Adjust the skb memory window to the frame boundaries.
*/
- if (header_size % 4 == 0) {
- skb_push(entry->skb, 2);
- memmove(entry->skb->data, entry->skb->data + 2,
- entry->skb->len - 2);
- }
+ skb_pull(entry->skb, offset + entry->queue->desc_size);
+ skb_trim(entry->skb, rxdesc->size);
/*
* Set descriptor and data pointer.
*/
- skbdesc->data = entry->skb->data + entry->queue->desc_size;
+ skbdesc->data = entry->skb->data;
skbdesc->data_len = rxdesc->size;
- skbdesc->desc = entry->skb->data;
+ skbdesc->desc = rxd;
skbdesc->desc_len = entry->queue->desc_size;
-
- /*
- * Remove descriptor from skb buffer and trim the whole thing
- * down to only contain data.
- */
- skb_pull(entry->skb, skbdesc->desc_len);
- skb_trim(entry->skb, rxdesc->size);
}
/*
@@ -1856,7 +1869,6 @@ static int rt73usb_probe_hw(struct rt2x00_dev *rt2x00dev)
* This device requires firmware.
*/
__set_bit(DRIVER_REQUIRE_FIRMWARE, &rt2x00dev->flags);
- __set_bit(DRIVER_REQUIRE_FIRMWARE_CRC_ITU_T, &rt2x00dev->flags);
/*
* Set the rssi offset.
@@ -1989,6 +2001,7 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
struct skb_frame_desc *skbdesc;
unsigned int beacon_base;
unsigned int timeout;
+ u32 reg;
if (unlikely(!intf->beacon))
return -ENOBUFS;
@@ -2012,6 +2025,16 @@ static int rt73usb_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb,
skbdesc->entry = intf->beacon;
/*
+ * Disable beaconing while we are reloading the beacon data,
+ * otherwise we might be sending out invalid data.
+ */
+ rt73usb_register_read(rt2x00dev, TXRX_CSR9, &reg);
+ rt2x00_set_field32(&reg, TXRX_CSR9_TSF_TICKING, 0);
+ rt2x00_set_field32(&reg, TXRX_CSR9_TBTT_ENABLE, 0);
+ rt2x00_set_field32(&reg, TXRX_CSR9_BEACON_GEN, 0);
+ rt73usb_register_write(rt2x00dev, TXRX_CSR9, reg);
+
+ /*
* mac80211 doesn't provide the control->queue variable
* for beacons. Set our own queue identification so
* it can be used during descriptor initialization.
@@ -2054,6 +2077,7 @@ static const struct ieee80211_ops rt73usb_mac80211_ops = {
static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
.probe_hw = rt73usb_probe_hw,
.get_firmware_name = rt73usb_get_firmware_name,
+ .get_firmware_crc = rt73usb_get_firmware_crc,
.load_firmware = rt73usb_load_firmware,
.initialize = rt2x00usb_initialize,
.uninitialize = rt2x00usb_uninitialize,
@@ -2070,7 +2094,7 @@ static const struct rt2x00lib_ops rt73usb_rt2x00_ops = {
.kick_tx_queue = rt73usb_kick_tx_queue,
.fill_rxdone = rt73usb_fill_rxdone,
.config_intf = rt73usb_config_intf,
- .config_preamble = rt73usb_config_preamble,
+ .config_erp = rt73usb_config_erp,
.config = rt73usb_config,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-03 01:01:17 +0000