From: Ben Cahill <ben.m.cahill@xxxxxxxxx>
Clean up and clarify some comments after 3945/4965 split.
Signed-off-by: Ben Cahill <ben.m.cahill@xxxxxxxxx>
Signed-off-by: Zhu Yi <yi.zhu@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-3945-rs.h | 11 ++-
drivers/net/wireless/iwlwifi/iwl-4965-rs.h | 5 +-
drivers/net/wireless/iwlwifi/iwl3945-base.c | 126 ++++++++-------------
drivers/net/wireless/iwlwifi/iwl4965-base.c | 163 ++++++++++++---------------
4 files changed, 132 insertions(+), 173 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.h b/drivers/net/wireless/iwlwifi/iwl-3945-rs.h
index 075f7de..e21a5ba 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.h
@@ -28,8 +28,8 @@
#define __iwl_3945_rs_h__
struct iwl3945_rate_info {
- u8 plcp;
- u8 ieee;
+ u8 plcp; /* uCode API: IWL_RATE_6M_PLCP, etc. */
+ u8 ieee; /* MAC header: IWL_RATE_6M_IEEE, etc. */
u8 prev_ieee; /* previous rate in IEEE speeds */
u8 next_ieee; /* next rate in IEEE speeds */
u8 prev_rs; /* previous rate used in rs algo */
@@ -38,9 +38,12 @@ struct iwl3945_rate_info {
u8 next_rs_tgg; /* next rate used in TGG rs algo */
u8 table_rs_index; /* index in rate scale table cmd */
u8 prev_table_rs; /* prev in rate table cmd */
-
};
+/*
+ * These serve as indexes into
+ * struct iwl3945_rate_info iwl3945_rates[IWL_RATE_COUNT];
+ */
enum {
IWL_RATE_1M_INDEX = 0,
IWL_RATE_2M_INDEX,
@@ -96,6 +99,7 @@ enum {
#define IWL_RATE_5M_MASK (1<<IWL_RATE_5M_INDEX)
#define IWL_RATE_11M_MASK (1<<IWL_RATE_11M_INDEX)
+/* 3945 uCode API values for (legacy) bit rates, both OFDM and CCK */
enum {
IWL_RATE_6M_PLCP = 13,
IWL_RATE_9M_PLCP = 15,
@@ -111,6 +115,7 @@ enum {
IWL_RATE_11M_PLCP = 110,
};
+/* MAC header values for bit rates */
enum {
IWL_RATE_6M_IEEE = 12,
IWL_RATE_9M_IEEE = 18,
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.h b/drivers/net/wireless/iwlwifi/iwl-4965-rs.h
index 86f62d8..0c9552b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.h
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.h
@@ -42,7 +42,10 @@ struct iwl4965_rate_info {
u8 next_rs_tgg; /* next rate used in TGG rs algo */
};
-/* For driver (not uCode API) */
+/*
+ * These serve as indexes into
+ * struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT];
+ */
enum {
IWL_RATE_1M_INDEX = 0,
IWL_RATE_2M_INDEX,
diff --git a/drivers/net/wireless/iwlwifi/iwl3945-base.c b/drivers/net/wireless/iwlwifi/iwl3945-base.c
index 496ca14..c0b6ac3 100644
--- a/drivers/net/wireless/iwlwifi/iwl3945-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl3945-base.c
@@ -27,16 +27,6 @@
*
*****************************************************************************/
-/*
- * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
- * by defining IWL to either 3945 or 4965. The Makefile used when building
- * the base targets will create base-3945.o and base-4965.o
- *
- * The eventual goal is to move as many of the #if IWL / #endif blocks out of
- * this file and into the hardware specific implementation files (iwl-XXXX.c)
- * and leave only the common (non #ifdef sprinkled) code in this file
- */
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
@@ -75,9 +65,9 @@ static int iwl3945_tx_queue_update_write_ptr(struct iwl3945_priv *priv,
/* module parameters */
static int iwl3945_param_disable_hw_scan;
static int iwl3945_param_debug;
-static int iwl3945_param_disable; /* def: enable radio */
-static int iwl3945_param_antenna; /* def: 0 = both antennas (use diversity) */
-int iwl3945_param_hwcrypto; /* def: using software encryption */
+static int iwl3945_param_disable; /* def: enable radio */
+static int iwl3945_param_antenna; /* def: 0 = both antennas (use diversity) */
+int iwl3945_param_hwcrypto; /* def: using software encryption */
static int iwl3945_param_qos_enable = 1;
int iwl3945_param_queues_num = IWL_MAX_NUM_QUEUES;
@@ -396,11 +386,7 @@ void iwl3945_tx_queue_free(struct iwl3945_priv *priv, struct iwl3945_tx_queue *t
const u8 iwl3945_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
/*************** STATION TABLE MANAGEMENT ****
- *
- * NOTE: This needs to be overhauled to better synchronize between
- * how the iwl-4965.c is using iwl3945_hw_find_station vs. iwl-3945.c
- *
- * mac80211 should also be examined to determine if sta_info is duplicating
+ * mac80211 should be examined to determine if sta_info is duplicating
* the functionality provided here
*/
@@ -956,12 +942,12 @@ static int iwl3945_check_rxon_cmd(struct iwl3945_rxon_cmd *rxon)
}
/**
- * iwl3945_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
+ * iwl3945_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
- * If the RXON structure is changing sufficient to require a new
- * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
- * to indicate a new tune is required.
+ * If the RXON structure is changing enough to require a new tune,
+ * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
+ * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
static int iwl3945_full_rxon_required(struct iwl3945_priv *priv)
{
@@ -1235,7 +1221,7 @@ static int iwl3945_card_state_sync_callback(struct iwl3945_priv *priv,
/*
* CARD_STATE_CMD
*
- * Use: Sets the internal card state to enable, disable, or halt
+ * Use: Sets the device's internal card state to enable, disable, or halt
*
* When in the 'enable' state the card operates as normal.
* When in the 'disable' state, the card enters into a low power mode.
@@ -1589,14 +1575,9 @@ int iwl3945_eeprom_init(struct iwl3945_priv *priv)
/**
* iwl3945_report_frame - dump frame to syslog during debug sessions
*
- * hack this function to show different aspects of received frames,
+ * You may hack this function to show different aspects of received frames,
* including selective frame dumps.
* group100 parameter selects whether to show 1 out of 100 good frames.
- *
- * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
- * info output is okay, but some of this stuff (e.g. iwl3945_rx_frame_stats)
- * is 3945-specific and gives bad output for 4965. Need to split the
- * functionality, keep common stuff here.
*/
void iwl3945_report_frame(struct iwl3945_priv *priv,
struct iwl3945_rx_packet *pkt,
@@ -3771,13 +3752,10 @@ static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
iwl3945_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl3945_rx_beacon_notif;
- /* NOTE: iwl3945_rx_statistics is different based on whether
- * the build is for the 3945 or the 4965. See the
- * corresponding implementation in iwl-XXXX.c
- *
- * The same handler is used for both the REPLY to a
- * discrete statistics request from the host as well as
- * for the periodic statistics notification from the uCode
+ /*
+ * The same handler is used for both the REPLY to a discrete
+ * statistics request from the host as well as for the periodic
+ * statistics notifications (after received beacons) from the uCode.
*/
priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl3945_hw_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl3945_hw_rx_statistics;
@@ -3791,7 +3769,7 @@ static void iwl3945_setup_rx_handlers(struct iwl3945_priv *priv)
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl3945_rx_card_state_notif;
priv->rx_handlers[REPLY_TX] = iwl3945_rx_reply_tx;
- /* Setup hardware specific Rx handlers */
+ /* Set up hardware specific Rx handlers */
iwl3945_hw_rx_handler_setup(priv);
}
@@ -3863,10 +3841,10 @@ static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
* The queue is empty (no good data) if WRITE = READ - 1, and is full if
* WRITE = READ.
*
- * During initialization the host sets up the READ queue position to the first
+ * During initialization, the host sets up the READ queue position to the first
* INDEX position, and WRITE to the last (READ - 1 wrapped)
*
- * When the firmware places a packet in a buffer it will advance the READ index
+ * When the firmware places a packet in a buffer, it will advance the READ index
* and fire the RX interrupt. The driver can then query the READ index and
* process as many packets as possible, moving the WRITE index forward as it
* resets the Rx queue buffers with new memory.
@@ -3888,16 +3866,16 @@ static void iwl3945_tx_cmd_complete(struct iwl3945_priv *priv,
*
* Driver sequence:
*
- * iwl3945_rx_queue_alloc() Allocates rx_free
- * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
+ * iwl3945_rx_queue_alloc() Allocates rx_free
+ * iwl3945_rx_replenish() Replenishes rx_free list from rx_used, and calls
* iwl3945_rx_queue_restock
- * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
+ * iwl3945_rx_queue_restock() Moves available buffers from rx_free into Rx
* queue, updates firmware pointers, and updates
* the WRITE index. If insufficient rx_free buffers
* are available, schedules iwl3945_rx_replenish
*
* -- enable interrupts --
- * ISR - iwl3945_rx() Detach iwl3945_rx_mem_buffers from pool up to the
+ * ISR - iwl3945_rx() Detach iwl3945_rx_mem_buffers from pool up to the
* READ INDEX, detaching the SKB from the pool.
* Moves the packet buffer from queue to rx_used.
* Calls iwl3945_rx_queue_restock to refill any empty
@@ -3923,12 +3901,6 @@ static int iwl3945_rx_queue_space(const struct iwl3945_rx_queue *q)
/**
* iwl3945_rx_queue_update_write_ptr - Update the write pointer for the RX queue
- *
- * NOTE: This function has 3945 and 4965 specific code sections
- * but is declared in base due to the majority of the
- * implementation being the same (only a numeric constant is
- * different)
- *
*/
int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_rx_queue *q)
{
@@ -3969,9 +3941,7 @@ int iwl3945_rx_queue_update_write_ptr(struct iwl3945_priv *priv, struct iwl3945_
}
/**
- * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
- *
- * NOTE: This function has 3945 and 4965 specific code paths in it.
+ * iwl3945_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
*/
static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
dma_addr_t dma_addr)
@@ -3982,9 +3952,9 @@ static inline __le32 iwl3945_dma_addr2rbd_ptr(struct iwl3945_priv *priv,
/**
* iwl3945_rx_queue_restock - refill RX queue from pre-allocated pool
*
- * If there are slots in the RX queue that need to be restocked,
+ * If there are slots in the RX queue that need to be restocked,
* and we have free pre-allocated buffers, fill the ranks as much
- * as we can pulling from rx_free.
+ * as we can, pulling from rx_free.
*
* This moves the 'write' index forward to catch up with 'processed', and
* also updates the memory address in the firmware to reference the new
@@ -4076,7 +4046,7 @@ void iwl3945_rx_replenish(void *data)
}
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
- * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
+ * If an SKB has been detached, the POOL needs to have its SKB set to NULL
* This free routine walks the list of POOL entries and if SKB is set to
* non NULL it is unmapped and freed
*/
@@ -4228,7 +4198,7 @@ int iwl3945_calc_sig_qual(int rssi_dbm, int noise_dbm)
}
/**
- * iwl3945_rx_handle - Main entry function for receiving responses from the uCode
+ * iwl3945_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
@@ -4253,7 +4223,7 @@ static void iwl3945_rx_handle(struct iwl3945_priv *priv)
while (i != r) {
rxb = rxq->queue[i];
- /* If an RXB doesn't have a queue slot associated with it
+ /* If an RXB doesn't have a Rx queue slot associated with it,
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
@@ -4292,8 +4262,8 @@ static void iwl3945_rx_handle(struct iwl3945_priv *priv)
}
if (reclaim) {
- /* Invoke any callbacks, transfer the skb to caller,
- * and fire off the (possibly) blocking iwl3945_send_cmd()
+ /* Invoke any callbacks, transfer the skb to caller, and
+ * fire off the (possibly) blocking iwl3945_send_cmd()
* as we reclaim the driver command queue */
if (rxb && rxb->skb)
iwl3945_tx_cmd_complete(priv, rxb);
@@ -4667,7 +4637,8 @@ static void iwl3945_irq_tasklet(struct iwl3945_priv *priv)
#ifdef CONFIG_IWL3945_DEBUG
if (iwl3945_debug_level & IWL_DL_ISR) {
- inta_mask = iwl3945_read32(priv, CSR_INT_MASK); /* just for debug */
+ /* just for debug */
+ inta_mask = iwl3945_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
}
@@ -4895,11 +4866,11 @@ static const u8 iwl3945_eeprom_band_1[14] = {
};
/* 5.2 GHz bands */
-static const u8 iwl3945_eeprom_band_2[] = {
+static const u8 iwl3945_eeprom_band_2[] = { /* 4915-5080MHz */
183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};
-static const u8 iwl3945_eeprom_band_3[] = { /* 5205-5320MHz */
+static const u8 iwl3945_eeprom_band_3[] = { /* 5170-5320MHz */
34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};
@@ -4923,7 +4894,7 @@ static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int ban
*eeprom_ch_info = priv->eeprom.band_1_channels;
*eeprom_ch_index = iwl3945_eeprom_band_1;
break;
- case 2: /* 5.2GHz band */
+ case 2: /* 4.9GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_2);
*eeprom_ch_info = priv->eeprom.band_2_channels;
*eeprom_ch_index = iwl3945_eeprom_band_2;
@@ -4933,12 +4904,12 @@ static void iwl3945_init_band_reference(const struct iwl3945_priv *priv, int ban
*eeprom_ch_info = priv->eeprom.band_3_channels;
*eeprom_ch_index = iwl3945_eeprom_band_3;
break;
- case 4: /* 5.2GHz band */
+ case 4: /* 5.5GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_4);
*eeprom_ch_info = priv->eeprom.band_4_channels;
*eeprom_ch_index = iwl3945_eeprom_band_4;
break;
- case 5: /* 5.2GHz band */
+ case 5: /* 5.7GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl3945_eeprom_band_5);
*eeprom_ch_info = priv->eeprom.band_5_channels;
*eeprom_ch_index = iwl3945_eeprom_band_5;
@@ -5201,7 +5172,7 @@ static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv, int phymode,
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
- /* Set power levels to defaults */
+ /* Set txpower levels to defaults */
scan_ch->tpc.dsp_atten = 110;
/* scan_pwr_info->tpc.dsp_atten; */
@@ -5211,8 +5182,8 @@ static int iwl3945_get_channels_for_scan(struct iwl3945_priv *priv, int phymode,
else {
scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
- * power level
- scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
+ * power level:
+ * scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
*/
}
@@ -5596,8 +5567,9 @@ static int iwl3945_verify_ucode(struct iwl3945_priv *priv)
IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
- /* Show first several data entries in instruction SRAM.
- * Selection of bootstrap image is arbitrary. */
+ /* Since nothing seems to match, show first several data entries in
+ * instruction SRAM, so maybe visual inspection will give a clue.
+ * Selection of bootstrap image (vs. other images) is arbitrary. */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
rc = iwl3945_verify_inst_full(priv, image, len);
@@ -5689,7 +5661,7 @@ static int iwl3945_load_bsm(struct iwl3945_priv *priv)
return -EINVAL;
/* Tell bootstrap uCode where to find the "Initialize" uCode
- * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
+ * in host DRAM ... host DRAM physical address bits 31:0 for 3945.
* NOTE: iwl3945_initialize_alive_start() will replace these values,
* after the "initialize" uCode has run, to point to
* runtime/protocol instructions and backup data cache. */
@@ -6014,12 +5986,8 @@ static int iwl3945_set_ucode_ptrs(struct iwl3945_priv *priv)
*
* Called after REPLY_ALIVE notification received from "initialize" uCode.
*
- * The 4965 "initialize" ALIVE reply contains calibration data for:
- * Voltage, temperature, and MIMO tx gain correction, now stored in priv
- * (3945 does not contain this data).
- *
* Tell "initialize" uCode to go ahead and load the runtime uCode.
-*/
+ */
static void iwl3945_init_alive_start(struct iwl3945_priv *priv)
{
/* Check alive response for "valid" sign from uCode */
@@ -6114,7 +6082,7 @@ static void iwl3945_alive_start(struct iwl3945_priv *priv)
} else
set_bit(STATUS_RF_KILL_HW, &priv->status);
- /* After the ALIVE response, we can process host commands */
+ /* After the ALIVE response, we can send commands to 3945 uCode */
set_bit(STATUS_ALIVE, &priv->status);
/* Clear out the uCode error bit if it is set */
@@ -6170,7 +6138,7 @@ static void iwl3945_alive_start(struct iwl3945_priv *priv)
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
}
- /* Configure BT coexistence */
+ /* Configure Bluetooth device coexistence support */
iwl3945_send_bt_config(priv);
/* Configure the adapter for unassociated operation */
@@ -6353,7 +6321,7 @@ static int __iwl3945_up(struct iwl3945_priv *priv)
/* start card; "initialize" will load runtime ucode */
iwl3945_nic_start(priv);
- /* MAC Address location in EEPROM same for 3945/4965 */
+ /* MAC Address location in EEPROM is same for 3945/4965 */
get_eeprom_mac(priv, priv->mac_addr);
IWL_DEBUG_INFO("MAC address: %s\n",
print_mac(mac, priv->mac_addr));
diff --git a/drivers/net/wireless/iwlwifi/iwl4965-base.c b/drivers/net/wireless/iwlwifi/iwl4965-base.c
index a41839e..f2a3ecd 100644
--- a/drivers/net/wireless/iwlwifi/iwl4965-base.c
+++ b/drivers/net/wireless/iwlwifi/iwl4965-base.c
@@ -27,16 +27,6 @@
*
*****************************************************************************/
-/*
- * NOTE: This file (iwl-base.c) is used to build to multiple hardware targets
- * by defining IWL to either 3945 or 4965. The Makefile used when building
- * the base targets will create base-3945.o and base-4965.o
- *
- * The eventual goal is to move as many of the #if IWL / #endif blocks out of
- * this file and into the hardware specific implementation files (iwl-XXXX.c)
- * and leave only the common (non #ifdef sprinkled) code in this file
- */
-
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/version.h>
@@ -75,9 +65,9 @@ static int iwl4965_tx_queue_update_write_ptr(struct iwl4965_priv *priv,
/* module parameters */
static int iwl4965_param_disable_hw_scan;
static int iwl4965_param_debug;
-static int iwl4965_param_disable; /* def: enable radio */
-static int iwl4965_param_antenna; /* def: 0 = both antennas (use diversity) */
-int iwl4965_param_hwcrypto; /* def: using software encryption */
+static int iwl4965_param_disable; /* def: enable radio */
+static int iwl4965_param_antenna; /* def: 0 = both antennas (use diversity) */
+int iwl4965_param_hwcrypto; /* def: using software encryption */
static int iwl4965_param_qos_enable = 1;
int iwl4965_param_queues_num = IWL_MAX_NUM_QUEUES;
@@ -395,11 +385,7 @@ void iwl4965_tx_queue_free(struct iwl4965_priv *priv, struct iwl4965_tx_queue *t
const u8 iwl4965_broadcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
/*************** STATION TABLE MANAGEMENT ****
- *
- * NOTE: This needs to be overhauled to better synchronize between
- * how the iwl-4965.c is using iwl4965_hw_find_station vs. iwl-3945.c
- *
- * mac80211 should also be examined to determine if sta_info is duplicating
+ * mac80211 should be examined to determine if sta_info is duplicating
* the functionality provided here
*/
@@ -482,8 +468,8 @@ u8 iwl4965_add_station_flags(struct iwl4965_priv *priv, const u8 *addr, int is_a
}
- /* These two conditions has the same outcome but keep them separate
- since they have different meaning */
+ /* These two conditions have the same outcome, but keep them separate
+ since they have different meanings */
if (unlikely(index == IWL_INVALID_STATION)) {
spin_unlock_irqrestore(&priv->sta_lock, flags_spin);
return index;
@@ -843,8 +829,8 @@ int iwl4965_send_statistics_request(struct iwl4965_priv *priv)
* iwl4965_rxon_add_station - add station into station table.
*
* there is only one AP station with id= IWL_AP_ID
- * NOTE: mutex must be held before calling the this fnction
-*/
+ * NOTE: mutex must be held before calling this fnction
+ */
static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
const u8 *addr, int is_ap)
{
@@ -866,7 +852,8 @@ static int iwl4965_rxon_add_station(struct iwl4965_priv *priv,
* NOTE: Does not commit to the hardware; it sets appropriate bit fields
* in the staging RXON flag structure based on the phymode
*/
-static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode, u16 channel)
+static int iwl4965_set_rxon_channel(struct iwl4965_priv *priv, u8 phymode,
+ u16 channel)
{
if (!iwl4965_get_channel_info(priv, phymode, channel)) {
IWL_DEBUG_INFO("Could not set channel to %d [%d]\n",
@@ -965,12 +952,12 @@ static int iwl4965_check_rxon_cmd(struct iwl4965_rxon_cmd *rxon)
}
/**
- * iwl4965_full_rxon_required - determine if RXON_ASSOC can be used in RXON commit
+ * iwl4965_full_rxon_required - check if full RXON (vs RXON_ASSOC) cmd is needed
* @priv: staging_rxon is compared to active_rxon
*
- * If the RXON structure is changing sufficient to require a new
- * tune or to clear and reset the RXON_FILTER_ASSOC_MSK then return 1
- * to indicate a new tune is required.
+ * If the RXON structure is changing enough to require a new tune,
+ * or is clearing the RXON_FILTER_ASSOC_MSK, then return 1 to indicate that
+ * a new tune (full RXON command, rather than RXON_ASSOC cmd) is required.
*/
static int iwl4965_full_rxon_required(struct iwl4965_priv *priv)
{
@@ -1267,7 +1254,7 @@ static int iwl4965_card_state_sync_callback(struct iwl4965_priv *priv,
/*
* CARD_STATE_CMD
*
- * Use: Sets the internal card state to enable, disable, or halt
+ * Use: Sets the device's internal card state to enable, disable, or halt
*
* When in the 'enable' state the card operates as normal.
* When in the 'disable' state, the card enters into a low power mode.
@@ -1643,14 +1630,12 @@ done:
/**
* iwl4965_report_frame - dump frame to syslog during debug sessions
*
- * hack this function to show different aspects of received frames,
+ * You may hack this function to show different aspects of received frames,
* including selective frame dumps.
* group100 parameter selects whether to show 1 out of 100 good frames.
*
- * TODO: ieee80211_hdr stuff is common to 3945 and 4965, so frame type
- * info output is okay, but some of this stuff (e.g. iwl4965_rx_frame_stats)
- * is 3945-specific and gives bad output for 4965. Need to split the
- * functionality, keep common stuff here.
+ * TODO: This was originally written for 3945, need to audit for
+ * proper operation with 4965.
*/
void iwl4965_report_frame(struct iwl4965_priv *priv,
struct iwl4965_rx_packet *pkt,
@@ -2742,7 +2727,8 @@ static void iwl4965_build_tx_cmd_basic(struct iwl4965_priv *priv,
cmd->cmd.tx.next_frame_len = 0;
}
-static int iwl4965_get_sta_id(struct iwl4965_priv *priv, struct ieee80211_hdr *hdr)
+static int iwl4965_get_sta_id(struct iwl4965_priv *priv,
+ struct ieee80211_hdr *hdr)
{
int sta_id;
u16 fc = le16_to_cpu(hdr->frame_control);
@@ -4100,13 +4086,10 @@ static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
iwl4965_rx_pm_debug_statistics_notif;
priv->rx_handlers[BEACON_NOTIFICATION] = iwl4965_rx_beacon_notif;
- /* NOTE: iwl4965_rx_statistics is different based on whether
- * the build is for the 3945 or the 4965. See the
- * corresponding implementation in iwl-XXXX.c
- *
- * The same handler is used for both the REPLY to a
- * discrete statistics request from the host as well as
- * for the periodic statistics notification from the uCode
+ /*
+ * The same handler is used for both the REPLY to a discrete
+ * statistics request from the host as well as for the periodic
+ * statistics notifications (after received beacons) from the uCode.
*/
priv->rx_handlers[REPLY_STATISTICS_CMD] = iwl4965_hw_rx_statistics;
priv->rx_handlers[STATISTICS_NOTIFICATION] = iwl4965_hw_rx_statistics;
@@ -4120,7 +4103,7 @@ static void iwl4965_setup_rx_handlers(struct iwl4965_priv *priv)
priv->rx_handlers[CARD_STATE_NOTIFICATION] = iwl4965_rx_card_state_notif;
priv->rx_handlers[REPLY_TX] = iwl4965_rx_reply_tx;
- /* Setup hardware specific Rx handlers */
+ /* Set up hardware specific Rx handlers */
iwl4965_hw_rx_handler_setup(priv);
}
@@ -4174,9 +4157,11 @@ static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
/*
* Rx theory of operation
*
- * The host allocates 32 DMA target addresses and passes the host address
- * to the firmware at register IWL_RFDS_TABLE_LOWER + N * RFD_SIZE where N is
- * 0 to 31
+ * Driver allocates a circular buffer of Receive Buffer Descriptors (RBDs),
+ * each of which point to Receive Buffers to be filled by 4965. These get
+ * used not only for Rx frames, but for any command response or notification
+ * from the 4965. The driver and 4965 manage the Rx buffers by means
+ * of indexes into the circular buffer.
*
* Rx Queue Indexes
* The host/firmware share two index registers for managing the Rx buffers.
@@ -4192,10 +4177,10 @@ static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
* The queue is empty (no good data) if WRITE = READ - 1, and is full if
* WRITE = READ.
*
- * During initialization the host sets up the READ queue position to the first
+ * During initialization, the host sets up the READ queue position to the first
* INDEX position, and WRITE to the last (READ - 1 wrapped)
*
- * When the firmware places a packet in a buffer it will advance the READ index
+ * When the firmware places a packet in a buffer, it will advance the READ index
* and fire the RX interrupt. The driver can then query the READ index and
* process as many packets as possible, moving the WRITE index forward as it
* resets the Rx queue buffers with new memory.
@@ -4217,16 +4202,16 @@ static void iwl4965_tx_cmd_complete(struct iwl4965_priv *priv,
*
* Driver sequence:
*
- * iwl4965_rx_queue_alloc() Allocates rx_free
- * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
+ * iwl4965_rx_queue_alloc() Allocates rx_free
+ * iwl4965_rx_replenish() Replenishes rx_free list from rx_used, and calls
* iwl4965_rx_queue_restock
- * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
+ * iwl4965_rx_queue_restock() Moves available buffers from rx_free into Rx
* queue, updates firmware pointers, and updates
* the WRITE index. If insufficient rx_free buffers
* are available, schedules iwl4965_rx_replenish
*
* -- enable interrupts --
- * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
+ * ISR - iwl4965_rx() Detach iwl4965_rx_mem_buffers from pool up to the
* READ INDEX, detaching the SKB from the pool.
* Moves the packet buffer from queue to rx_used.
* Calls iwl4965_rx_queue_restock to refill any empty
@@ -4252,12 +4237,6 @@ static int iwl4965_rx_queue_space(const struct iwl4965_rx_queue *q)
/**
* iwl4965_rx_queue_update_write_ptr - Update the write pointer for the RX queue
- *
- * NOTE: This function has 3945 and 4965 specific code sections
- * but is declared in base due to the majority of the
- * implementation being the same (only a numeric constant is
- * different)
- *
*/
int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_rx_queue *q)
{
@@ -4298,9 +4277,7 @@ int iwl4965_rx_queue_update_write_ptr(struct iwl4965_priv *priv, struct iwl4965_
}
/**
- * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer pointer.
- *
- * NOTE: This function has 3945 and 4965 specific code paths in it.
+ * iwl4965_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr
*/
static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
dma_addr_t dma_addr)
@@ -4312,9 +4289,9 @@ static inline __le32 iwl4965_dma_addr2rbd_ptr(struct iwl4965_priv *priv,
/**
* iwl4965_rx_queue_restock - refill RX queue from pre-allocated pool
*
- * If there are slots in the RX queue that need to be restocked,
+ * If there are slots in the RX queue that need to be restocked,
* and we have free pre-allocated buffers, fill the ranks as much
- * as we can pulling from rx_free.
+ * as we can, pulling from rx_free.
*
* This moves the 'write' index forward to catch up with 'processed', and
* also updates the memory address in the firmware to reference the new
@@ -4406,7 +4383,7 @@ void iwl4965_rx_replenish(void *data)
}
/* Assumes that the skb field of the buffers in 'pool' is kept accurate.
- * If an SKB has been detached, the POOL needs to have it's SKB set to NULL
+ * If an SKB has been detached, the POOL needs to have its SKB set to NULL
* This free routine walks the list of POOL entries and if SKB is set to
* non NULL it is unmapped and freed
*/
@@ -4558,7 +4535,7 @@ int iwl4965_calc_sig_qual(int rssi_dbm, int noise_dbm)
}
/**
- * iwl4965_rx_handle - Main entry function for receiving responses from the uCode
+ * iwl4965_rx_handle - Main entry function for receiving responses from uCode
*
* Uses the priv->rx_handlers callback function array to invoke
* the appropriate handlers, including command responses,
@@ -4583,7 +4560,7 @@ static void iwl4965_rx_handle(struct iwl4965_priv *priv)
while (i != r) {
rxb = rxq->queue[i];
- /* If an RXB doesn't have a queue slot associated with it
+ /* If an RXB doesn't have a Rx queue slot associated with it,
* then a bug has been introduced in the queue refilling
* routines -- catch it here */
BUG_ON(rxb == NULL);
@@ -4625,8 +4602,8 @@ static void iwl4965_rx_handle(struct iwl4965_priv *priv)
}
if (reclaim) {
- /* Invoke any callbacks, transfer the skb to caller,
- * and fire off the (possibly) blocking iwl4965_send_cmd()
+ /* Invoke any callbacks, transfer the skb to caller, and
+ * fire off the (possibly) blocking iwl4965_send_cmd()
* as we reclaim the driver command queue */
if (rxb && rxb->skb)
iwl4965_tx_cmd_complete(priv, rxb);
@@ -4992,7 +4969,8 @@ static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
#ifdef CONFIG_IWL4965_DEBUG
if (iwl4965_debug_level & IWL_DL_ISR) {
- inta_mask = iwl4965_read32(priv, CSR_INT_MASK); /* just for debug */
+ /* just for debug */
+ inta_mask = iwl4965_read32(priv, CSR_INT_MASK);
IWL_DEBUG_ISR("inta 0x%08x, enabled 0x%08x, fh 0x%08x\n",
inta, inta_mask, inta_fh);
}
@@ -5037,7 +5015,7 @@ static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
/* Safely ignore these bits for debug checks below */
inta &= ~(CSR_INT_BIT_MAC_CLK_ACTV | CSR_INT_BIT_ALIVE);
- /* HW RF KILL switch toggled (4965 only) */
+ /* HW RF KILL switch toggled */
if (inta & CSR_INT_BIT_RF_KILL) {
int hw_rf_kill = 0;
if (!(iwl4965_read32(priv, CSR_GP_CNTRL) &
@@ -5058,7 +5036,7 @@ static void iwl4965_irq_tasklet(struct iwl4965_priv *priv)
handled |= CSR_INT_BIT_RF_KILL;
}
- /* Chip got too hot and stopped itself (4965 only) */
+ /* Chip got too hot and stopped itself */
if (inta & CSR_INT_BIT_CT_KILL) {
IWL_ERROR("Microcode CT kill error detected.\n");
handled |= CSR_INT_BIT_CT_KILL;
@@ -5213,11 +5191,11 @@ static const u8 iwl4965_eeprom_band_1[14] = {
};
/* 5.2 GHz bands */
-static const u8 iwl4965_eeprom_band_2[] = {
+static const u8 iwl4965_eeprom_band_2[] = { /* 4915-5080MHz */
183, 184, 185, 187, 188, 189, 192, 196, 7, 8, 11, 12, 16
};
-static const u8 iwl4965_eeprom_band_3[] = { /* 5205-5320MHz */
+static const u8 iwl4965_eeprom_band_3[] = { /* 5170-5320MHz */
34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64
};
@@ -5237,7 +5215,8 @@ static u8 iwl4965_eeprom_band_7[] = { /* 5.2 FAT channel */
36, 44, 52, 60, 100, 108, 116, 124, 132, 149, 157
};
-static void iwl4965_init_band_reference(const struct iwl4965_priv *priv, int band,
+static void iwl4965_init_band_reference(const struct iwl4965_priv *priv,
+ int band,
int *eeprom_ch_count,
const struct iwl4965_eeprom_channel
**eeprom_ch_info,
@@ -5249,7 +5228,7 @@ static void iwl4965_init_band_reference(const struct iwl4965_priv *priv, int ban
*eeprom_ch_info = priv->eeprom.band_1_channels;
*eeprom_ch_index = iwl4965_eeprom_band_1;
break;
- case 2: /* 5.2GHz band */
+ case 2: /* 4.9GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_2);
*eeprom_ch_info = priv->eeprom.band_2_channels;
*eeprom_ch_index = iwl4965_eeprom_band_2;
@@ -5259,22 +5238,22 @@ static void iwl4965_init_band_reference(const struct iwl4965_priv *priv, int ban
*eeprom_ch_info = priv->eeprom.band_3_channels;
*eeprom_ch_index = iwl4965_eeprom_band_3;
break;
- case 4: /* 5.2GHz band */
+ case 4: /* 5.5GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_4);
*eeprom_ch_info = priv->eeprom.band_4_channels;
*eeprom_ch_index = iwl4965_eeprom_band_4;
break;
- case 5: /* 5.2GHz band */
+ case 5: /* 5.7GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_5);
*eeprom_ch_info = priv->eeprom.band_5_channels;
*eeprom_ch_index = iwl4965_eeprom_band_5;
break;
- case 6:
+ case 6: /* 2.4GHz FAT channels */
*eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_6);
*eeprom_ch_info = priv->eeprom.band_24_channels;
*eeprom_ch_index = iwl4965_eeprom_band_6;
break;
- case 7:
+ case 7: /* 5 GHz FAT channels */
*eeprom_ch_count = ARRAY_SIZE(iwl4965_eeprom_band_7);
*eeprom_ch_info = priv->eeprom.band_52_channels;
*eeprom_ch_index = iwl4965_eeprom_band_7;
@@ -5543,7 +5522,8 @@ static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
scan_ch->channel = channels[i].chan;
- ch_info = iwl4965_get_channel_info(priv, phymode, scan_ch->channel);
+ ch_info = iwl4965_get_channel_info(priv, phymode,
+ scan_ch->channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN("Channel %d is INVALID for this SKU.\n",
scan_ch->channel);
@@ -5565,7 +5545,7 @@ static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
- /* Set power levels to defaults */
+ /* Set txpower levels to defaults */
scan_ch->tpc.dsp_atten = 110;
/* scan_pwr_info->tpc.dsp_atten; */
@@ -5575,8 +5555,8 @@ static int iwl4965_get_channels_for_scan(struct iwl4965_priv *priv, int phymode,
else {
scan_ch->tpc.tx_gain = ((1 << 5) | (5 << 3));
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
- * power level
- scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
+ * power level:
+ * scan_ch->tpc.tx_gain = ((1<<5) | (2 << 3)) | 3;
*/
}
@@ -5853,7 +5833,8 @@ static void iwl4965_dealloc_ucode_pci(struct iwl4965_priv *priv)
* iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
-static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 * image, u32 len)
+static int iwl4965_verify_inst_full(struct iwl4965_priv *priv, __le32 * image,
+ u32 len)
{
u32 val;
u32 save_len = len;
@@ -5978,8 +5959,9 @@ static int iwl4965_verify_ucode(struct iwl4965_priv *priv)
IWL_ERROR("NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
- /* Show first several data entries in instruction SRAM.
- * Selection of bootstrap image is arbitrary. */
+ /* Since nothing seems to match, show first several data entries in
+ * instruction SRAM, so maybe visual inspection will give a clue.
+ * Selection of bootstrap image (vs. other images) is arbitrary. */
image = (__le32 *)priv->ucode_boot.v_addr;
len = priv->ucode_boot.len;
rc = iwl4965_verify_inst_full(priv, image, len);
@@ -6071,7 +6053,7 @@ static int iwl4965_load_bsm(struct iwl4965_priv *priv)
return -EINVAL;
/* Tell bootstrap uCode where to find the "Initialize" uCode
- * in host DRAM ... bits 31:0 for 3945, bits 35:4 for 4965.
+ * in host DRAM ... host DRAM physical address bits 35:4 for 4965.
* NOTE: iwl4965_initialize_alive_start() will replace these values,
* after the "initialize" uCode has run, to point to
* runtime/protocol instructions and backup data cache. */
@@ -6481,7 +6463,7 @@ static void iwl4965_alive_start(struct iwl4965_priv *priv)
goto restart;
}
- /* After the ALIVE response, we can process host commands */
+ /* After the ALIVE response, we can send host commands to 4965 uCode */
set_bit(STATUS_ALIVE, &priv->status);
/* Clear out the uCode error bit if it is set */
@@ -6537,7 +6519,7 @@ static void iwl4965_alive_start(struct iwl4965_priv *priv)
memcpy(priv->staging_rxon.node_addr, priv->mac_addr, ETH_ALEN);
}
- /* Configure BT coexistence */
+ /* Configure Bluetooth device coexistence support */
iwl4965_send_bt_config(priv);
/* Configure the adapter for unassociated operation */
@@ -6619,7 +6601,8 @@ static void __iwl4965_down(struct iwl4965_priv *priv)
STATUS_FW_ERROR;
spin_lock_irqsave(&priv->lock, flags);
- iwl4965_clear_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
+ iwl4965_clear_bit(priv, CSR_GP_CNTRL,
+ CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
spin_unlock_irqrestore(&priv->lock, flags);
iwl4965_hw_txq_ctx_stop(priv);
@@ -6732,7 +6715,7 @@ static int __iwl4965_up(struct iwl4965_priv *priv)
/* start card; "initialize" will load runtime ucode */
iwl4965_nic_start(priv);
- /* MAC Address location in EEPROM same for 3945/4965 */
+ /* MAC Address location in EEPROM is same for 3945/4965 */
get_eeprom_mac(priv, priv->mac_addr);
IWL_DEBUG_INFO("MAC address: %s\n",
print_mac(mac, priv->mac_addr));
--
1.5.3.6
-
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