diff options
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-3945-hw.h | 94 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-3945.c | 9 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965-hw.h | 209 | ||||
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-4965.c | 9 |
4 files changed, 285 insertions, 36 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h b/drivers/net/wireless/iwlwifi/iwl-3945-hw.h index 8bbaa16442a5..2c9f884be032 100644 --- a/drivers/net/wireless/iwlwifi/iwl-3945-hw.h +++ b/drivers/net/wireless/iwlwifi/iwl-3945-hw.h @@ -85,24 +85,48 @@ #define IWL_RSSI_OFFSET 95 /* - * This file defines EEPROM related constants, enums, and inline functions. - * + * EEPROM related constants, enums, and structures. */ +/* + * EEPROM access time values: + * + * Driver initiates EEPROM read by writing byte address << 1 to CSR_EEPROM_REG, + * then clearing (with subsequent read/modify/write) CSR_EEPROM_REG bit + * CSR_EEPROM_REG_BIT_CMD (0x2). + * Driver then polls CSR_EEPROM_REG for CSR_EEPROM_REG_READ_VALID_MSK (0x1). + * When polling, wait 10 uSec between polling loops, up to a maximum 5000 uSec. + * Driver reads 16-bit value from bits 31-16 of CSR_EEPROM_REG. + */ #define IWL_EEPROM_ACCESS_TIMEOUT 5000 /* uSec */ #define IWL_EEPROM_ACCESS_DELAY 10 /* uSec */ + /* EEPROM field values */ #define ANTENNA_SWITCH_NORMAL 0 #define ANTENNA_SWITCH_INVERSE 1 +/* + * Regulatory channel usage flags in EEPROM struct iwl_eeprom_channel.flags. + * + * IBSS and/or AP operation is allowed *only* on those channels with + * (VALID && IBSS && ACTIVE && !RADAR). This restriction is in place because + * RADAR detection is not supported by the 3945 driver, but is a + * requirement for establishing a new network for legal operation on channels + * requiring RADAR detection or restricting ACTIVE scanning. + * + * NOTE: "WIDE" flag indicates that 20 MHz channel is supported; + * 3945 does not support FAT 40 MHz-wide channels. + * + * NOTE: Using a channel inappropriately will result in a uCode error! + */ enum { EEPROM_CHANNEL_VALID = (1 << 0), /* usable for this SKU/geo */ - EEPROM_CHANNEL_IBSS = (1 << 1), /* usable as an IBSS channel */ + EEPROM_CHANNEL_IBSS = (1 << 1), /* usable as an IBSS channel */ /* Bit 2 Reserved */ EEPROM_CHANNEL_ACTIVE = (1 << 3), /* active scanning allowed */ EEPROM_CHANNEL_RADAR = (1 << 4), /* radar detection required */ - EEPROM_CHANNEL_WIDE = (1 << 5), - EEPROM_CHANNEL_NARROW = (1 << 6), + EEPROM_CHANNEL_WIDE = (1 << 5), /* 20 MHz channel okay */ + EEPROM_CHANNEL_NARROW = (1 << 6), /* 10 MHz channel, not used */ EEPROM_CHANNEL_DFS = (1 << 7), /* dynamic freq selection candidate */ }; @@ -147,6 +171,7 @@ struct iwl3945_eeprom_channel { * long packets in normal operation to provide feedback as to proper output * level. * Data copied from EEPROM. + * DO NOT ALTER THIS STRUCTURE!!! */ struct iwl3945_eeprom_txpower_sample { u8 gain_index; /* index into power (gain) setup table ... */ @@ -163,11 +188,11 @@ struct iwl3945_eeprom_txpower_sample { * DO NOT ALTER THIS STRUCTURE!!! */ struct iwl3945_eeprom_txpower_group { - struct iwl3945_eeprom_txpower_sample samples[5]; /* 5 power levels */ + struct iwl3945_eeprom_txpower_sample samples[5]; /* 5 power levels */ s32 a, b, c, d, e; /* coefficients for voltage->power * formula (signed) */ s32 Fa, Fb, Fc, Fd, Fe; /* these modify coeffs based on - * frequency (signed) */ + * frequency (signed) */ s8 saturation_power; /* highest power possible by h/w in this * band */ u8 group_channel; /* "representative" channel # in this band */ @@ -189,6 +214,9 @@ struct iwl3945_eeprom_temperature_corr { u32 Te; } __attribute__ ((packed)); +/* + * EEPROM map + */ struct iwl3945_eeprom { u8 reserved0[16]; #define EEPROM_DEVICE_ID (2*0x08) /* 2 bytes */ @@ -229,29 +257,67 @@ struct iwl3945_eeprom { u8 reserved6[42]; #define EEPROM_REGULATORY_SKU_ID (2*0x60) /* 4 bytes */ u8 sku_id[4]; /* abs.ofs: 192 */ + +/* + * Per-channel regulatory data. + * + * Each channel that *might* be supported by 3945 or 4965 has a fixed location + * in EEPROM containing EEPROM_CHANNEL_* usage flags (LSB) and max regulatory + * txpower (MSB). + * + * Entries immediately below are for 20 MHz channel width. FAT (40 MHz) + * channels (only for 4965, not supported by 3945) appear later in the EEPROM. + * + * 2.4 GHz channels 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 + */ #define EEPROM_REGULATORY_BAND_1 (2*0x62) /* 2 bytes */ u16 band_1_count; /* abs.ofs: 196 */ #define EEPROM_REGULATORY_BAND_1_CHANNELS (2*0x63) /* 28 bytes */ - struct iwl3945_eeprom_channel band_1_channels[14]; /* abs.ofs: 196 */ + struct iwl3945_eeprom_channel band_1_channels[14]; /* abs.ofs: 196 */ + +/* + * 4.9 GHz channels 183, 184, 185, 187, 188, 189, 192, 196, + * 5.0 GHz channels 7, 8, 11, 12, 16 + * (4915-5080MHz) (none of these is ever supported) + */ #define EEPROM_REGULATORY_BAND_2 (2*0x71) /* 2 bytes */ u16 band_2_count; /* abs.ofs: 226 */ #define EEPROM_REGULATORY_BAND_2_CHANNELS (2*0x72) /* 26 bytes */ - struct iwl3945_eeprom_channel band_2_channels[13]; /* abs.ofs: 228 */ + struct iwl3945_eeprom_channel band_2_channels[13]; /* abs.ofs: 228 */ + +/* + * 5.2 GHz channels 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 + * (5170-5320MHz) + */ #define EEPROM_REGULATORY_BAND_3 (2*0x7F) /* 2 bytes */ u16 band_3_count; /* abs.ofs: 254 */ #define EEPROM_REGULATORY_BAND_3_CHANNELS (2*0x80) /* 24 bytes */ - struct iwl3945_eeprom_channel band_3_channels[12]; /* abs.ofs: 256 */ + struct iwl3945_eeprom_channel band_3_channels[12]; /* abs.ofs: 256 */ + +/* + * 5.5 GHz channels 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 + * (5500-5700MHz) + */ #define EEPROM_REGULATORY_BAND_4 (2*0x8C) /* 2 bytes */ u16 band_4_count; /* abs.ofs: 280 */ #define EEPROM_REGULATORY_BAND_4_CHANNELS (2*0x8D) /* 22 bytes */ - struct iwl3945_eeprom_channel band_4_channels[11]; /* abs.ofs: 282 */ + struct iwl3945_eeprom_channel band_4_channels[11]; /* abs.ofs: 282 */ + +/* + * 5.7 GHz channels 145, 149, 153, 157, 161, 165 + * (5725-5825MHz) + */ #define EEPROM_REGULATORY_BAND_5 (2*0x98) /* 2 bytes */ u16 band_5_count; /* abs.ofs: 304 */ #define EEPROM_REGULATORY_BAND_5_CHANNELS (2*0x99) /* 12 bytes */ - struct iwl3945_eeprom_channel band_5_channels[6]; /* abs.ofs: 306 */ + struct iwl3945_eeprom_channel band_5_channels[6]; /* abs.ofs: 306 */ u8 reserved9[194]; + +/* + * 3945 Txpower calibration data. + */ #define EEPROM_TXPOWER_CALIB_GROUP0 0x200 #define EEPROM_TXPOWER_CALIB_GROUP1 0x240 #define EEPROM_TXPOWER_CALIB_GROUP2 0x280 @@ -261,12 +327,14 @@ struct iwl3945_eeprom { struct iwl3945_eeprom_txpower_group groups[IWL_NUM_TX_CALIB_GROUPS]; /* abs.ofs: 512 */ #define EEPROM_CALIB_TEMPERATURE_CORRECT 0x340 - struct iwl3945_eeprom_temperature_corr corrections; /* abs.ofs: 832 */ + struct iwl3945_eeprom_temperature_corr corrections; /* abs.ofs: 832 */ u8 reserved16[172]; /* fill out to full 1024 byte block */ } __attribute__ ((packed)); #define IWL_EEPROM_IMAGE_SIZE 1024 +/* End of EEPROM */ + #include "iwl-3945-commands.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-3945.c b/drivers/net/wireless/iwlwifi/iwl-3945.c index 953a9bec0639..51b90309ce5a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-3945.c +++ b/drivers/net/wireless/iwlwifi/iwl-3945.c @@ -2202,6 +2202,7 @@ int iwl3945_init_hw_rate_table(struct iwl3945_priv *priv) &rate_cmd); } +/* Called when initializing driver */ int iwl3945_hw_set_hw_setting(struct iwl3945_priv *priv) { memset((void *)&priv->hw_setting, 0, @@ -2284,6 +2285,14 @@ struct pci_device_id iwl3945_hw_card_ids[] = { {0} }; +/* + * Clear the OWNER_MSK, to establish driver (instead of uCode running on + * embedded controller) as EEPROM reader; each read is a series of pulses + * to/from the EEPROM chip, not a single event, so even reads could conflict + * if they weren't arbitrated by some ownership mechanism. Here, the driver + * simply claims ownership, which should be safe when this function is called + * (i.e. before loading uCode!). + */ inline int iwl3945_eeprom_acquire_semaphore(struct iwl3945_priv *priv) { _iwl3945_clear_bit(priv, CSR_EEPROM_GP, CSR_EEPROM_GP_IF_OWNER_MSK); diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-hw.h b/drivers/net/wireless/iwlwifi/iwl-4965-hw.h index dfaa60779460..4741fa228315 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965-hw.h +++ b/drivers/net/wireless/iwlwifi/iwl-4965-hw.h @@ -85,24 +85,50 @@ #define IWL_RSSI_OFFSET 44 /* - * This file defines EEPROM related constants, enums, and inline functions. - * + * EEPROM related constants, enums, and structures. */ +/* + * EEPROM access time values: + * + * Driver initiates EEPROM read by writing byte address << 1 to CSR_EEPROM_REG, + * then clearing (with subsequent read/modify/write) CSR_EEPROM_REG bit + * CSR_EEPROM_REG_BIT_CMD (0x2). + * Driver then polls CSR_EEPROM_REG for CSR_EEPROM_REG_READ_VALID_MSK (0x1). + * When polling, wait 10 uSec between polling loops, up to a maximum 5000 uSec. + * Driver reads 16-bit value from bits 31-16 of CSR_EEPROM_REG. + */ #define IWL_EEPROM_ACCESS_TIMEOUT 5000 /* uSec */ #define IWL_EEPROM_ACCESS_DELAY 10 /* uSec */ + /* EEPROM field values */ #define ANTENNA_SWITCH_NORMAL 0 #define ANTENNA_SWITCH_INVERSE 1 +/* + * Regulatory channel usage flags in EEPROM struct iwl4965_eeprom_channel.flags. + * + * IBSS and/or AP operation is allowed *only* on those channels with + * (VALID && IBSS && ACTIVE && !RADAR). This restriction is in place because + * RADAR detection is not supported by the 4965 driver, but is a + * requirement for establishing a new network for legal operation on channels + * requiring RADAR detection or restricting ACTIVE scanning. + * + * NOTE: "WIDE" flag does not indicate anything about "FAT" 40 MHz channels. + * It only indicates that 20 MHz channel use is supported; FAT channel + * usage is indicated by a separate set of regulatory flags for each + * FAT channel pair. + * + * NOTE: Using a channel inappropriately will result in a uCode error! + */ enum { EEPROM_CHANNEL_VALID = (1 << 0), /* usable for this SKU/geo */ - EEPROM_CHANNEL_IBSS = (1 << 1), /* usable as an IBSS channel */ + EEPROM_CHANNEL_IBSS = (1 << 1), /* usable as an IBSS channel */ /* Bit 2 Reserved */ EEPROM_CHANNEL_ACTIVE = (1 << 3), /* active scanning allowed */ EEPROM_CHANNEL_RADAR = (1 << 4), /* radar detection required */ - EEPROM_CHANNEL_WIDE = (1 << 5), - EEPROM_CHANNEL_NARROW = (1 << 6), + EEPROM_CHANNEL_WIDE = (1 << 5), /* 20 MHz channel okay */ + EEPROM_CHANNEL_NARROW = (1 << 6), /* 10 MHz channel, not used */ EEPROM_CHANNEL_DFS = (1 << 7), /* dynamic freq selection candidate */ }; @@ -136,9 +162,10 @@ enum { #define EEPROM_SKU_CAP_HW_RF_KILL_ENABLE (1 << 1) #define EEPROM_SKU_CAP_OP_MODE_MRC (1 << 7) -/* *regulatory* channel data from eeprom, one for each channel */ +/* *regulatory* channel data format in eeprom, one for each channel. + * There are separate entries for FAT (40 MHz) vs. normal (20 MHz) channels. */ struct iwl4965_eeprom_channel { - u8 flags; /* flags copied from EEPROM */ + u8 flags; /* EEPROM_CHANNEL_* flags copied from EEPROM */ s8 max_power_avg; /* max power (dBm) on this chnl, limit 31 */ } __attribute__ ((packed)); @@ -193,44 +220,112 @@ struct iwl4965_eeprom_temperature_corr { u32 Te; } __attribute__ ((packed)); +/* 4965 has two radio transmitters (and 3 radio receivers) */ #define EEPROM_TX_POWER_TX_CHAINS (2) + +/* 4965 has room for up to 8 sets of txpower calibration data */ #define EEPROM_TX_POWER_BANDS (8) + +/* 4965 factory calibration measures txpower gain settings for + * each of 3 target output levels */ #define EEPROM_TX_POWER_MEASUREMENTS (3) + #define EEPROM_TX_POWER_VERSION (2) + +/* 4965 driver does not work with txpower calibration version < 5. + * Look for this in calib_version member of struct iwl4965_eeprom. */ #define EEPROM_TX_POWER_VERSION_NEW (5) + +/* + * 4965 factory calibration data for one txpower level, on one channel, + * measured on one of the 2 tx chains (radio transmitter and associated + * antenna). EEPROM contains: + * + * 1) Temperature (degrees Celsius) of device when measurement was made. + * + * 2) Gain table index used to achieve the target measurement power. + * This refers to the "well-known" gain tables (see iwl-4965-hw.h). + * + * 3) Actual measured output power, in half-dBm ("34" = 17 dBm). + * + * 4) RF power amplifier detector level measurement (not used). + */ struct iwl4965_eeprom_calib_measure { - u8 temperature; - u8 gain_idx; - u8 actual_pow; - s8 pa_det; + u8 temperature; /* Device temperature (Celsius) */ + u8 gain_idx; /* Index into gain table */ + u8 actual_pow; /* Measured RF output power, half-dBm */ + s8 pa_det; /* Power amp detector level (not used) */ } __attribute__ ((packed)); + +/* + * 4965 measurement set for one channel. EEPROM contains: + * + * 1) Channel number measured + * + * 2) Measurements for each of 3 power levels for each of 2 radio transmitters + * (a.k.a. "tx chains") (6 measurements altogether) + */ struct iwl4965_eeprom_calib_ch_info { u8 ch_num; struct iwl4965_eeprom_calib_measure measurements[EEPROM_TX_POWER_TX_CHAINS] [EEPROM_TX_POWER_MEASUREMENTS]; } __attribute__ ((packed)); +/* + * 4965 txpower subband info. + * + * For each frequency subband, EEPROM contains the following: + * + * 1) First and last channels within range of the subband. "0" values + * indicate that this sample set is not being used. + * + * 2) Sample measurement sets for 2 channels close to the range endpoints. + */ struct iwl4965_eeprom_calib_subband_info { - u8 ch_from; - u8 ch_to; + u8 ch_from; /* channel number of lowest channel in subband */ + u8 ch_to; /* channel number of highest channel in subband */ struct iwl4965_eeprom_calib_ch_info ch1; struct iwl4965_eeprom_calib_ch_info ch2; } __attribute__ ((packed)); + +/* + * 4965 txpower calibration info. EEPROM contains: + * + * 1) Factory-measured saturation power levels (maximum levels at which + * tx power amplifier can output a signal without too much distortion). + * There is one level for 2.4 GHz band and one for 5 GHz band. These + * values apply to all channels within each of the bands. + * + * 2) Factory-measured power supply voltage level. This is assumed to be + * constant (i.e. same value applies to all channels/bands) while the + * factory measurements are being made. + * + * 3) Up to 8 sets of factory-measured txpower calibration values. + * These are for different frequency ranges, since txpower gain + * characteristics of the analog radio circuitry vary with frequency. + * + * Not all sets need to be filled with data; + * struct iwl4965_eeprom_calib_subband_info contains range of channels + * (0 if unused) for each set of data. + */ struct iwl4965_eeprom_calib_info { - u8 saturation_power24; - u8 saturation_power52; + u8 saturation_power24; /* half-dBm (e.g. "34" = 17 dBm) */ + u8 saturation_power52; /* half-dBm */ s16 voltage; /* signed */ struct iwl4965_eeprom_calib_subband_info band_info[EEPROM_TX_POWER_BANDS]; } __attribute__ ((packed)); +/* + * 4965 EEPROM map + */ struct iwl4965_eeprom { u8 reserved0[16]; #define EEPROM_DEVICE_ID (2*0x08) /* 2 bytes */ - u16 device_id; /* abs.ofs: 16 */ + u16 device_id; /* abs.ofs: 16 */ u8 reserved1[2]; #define EEPROM_PMC (2*0x0A) /* 2 bytes */ u16 pmc; /* abs.ofs: 20 */ @@ -273,40 +368,107 @@ struct iwl4965_eeprom { u8 reserved8[10]; #define EEPROM_REGULATORY_SKU_ID (2*0x60) /* 4 bytes */ u8 sku_id[4]; /* abs.ofs: 192 */ + +/* + * Per-channel regulatory data. + * + * Each channel that *might* be supported by 3945 or 4965 has a fixed location + * in EEPROM containing EEPROM_CHANNEL_* usage flags (LSB) and max regulatory + * txpower (MSB). + * + * Entries immediately below are for 20 MHz channel width. FAT (40 MHz) + * channels (only for 4965, not supported by 3945) appear later in the EEPROM. + * + * 2.4 GHz channels 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 + */ #define EEPROM_REGULATORY_BAND_1 (2*0x62) /* 2 bytes */ u16 band_1_count; /* abs.ofs: 196 */ #define EEPROM_REGULATORY_BAND_1_CHANNELS (2*0x63) /* 28 bytes */ - struct iwl4965_eeprom_channel band_1_channels[14]; /* abs.ofs: 196 */ + struct iwl4965_eeprom_channel band_1_channels[14]; /* abs.ofs: 196 */ + +/* + * 4.9 GHz channels 183, 184, 185, 187, 188, 189, 192, 196, + * 5.0 GHz channels 7, 8, 11, 12, 16 + * (4915-5080MHz) (none of these is ever supported) + */ #define EEPROM_REGULATORY_BAND_2 (2*0x71) /* 2 bytes */ u16 band_2_count; /* abs.ofs: 226 */ #define EEPROM_REGULATORY_BAND_2_CHANNELS (2*0x72) /* 26 bytes */ - struct iwl4965_eeprom_channel band_2_channels[13]; /* abs.ofs: 228 */ + struct iwl4965_eeprom_channel band_2_channels[13]; /* abs.ofs: 228 */ + +/* + * 5.2 GHz channels 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 + * (5170-5320MHz) + */ #define EEPROM_REGULATORY_BAND_3 (2*0x7F) /* 2 bytes */ u16 band_3_count; /* abs.ofs: 254 */ #define EEPROM_REGULATORY_BAND_3_CHANNELS (2*0x80) /* 24 bytes */ - struct iwl4965_eeprom_channel band_3_channels[12]; /* abs.ofs: 256 */ + struct iwl4965_eeprom_channel band_3_channels[12]; /* abs.ofs: 256 */ + +/* + * 5.5 GHz channels 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 + * (5500-5700MHz) + */ #define EEPROM_REGULATORY_BAND_4 (2*0x8C) /* 2 bytes */ u16 band_4_count; /* abs.ofs: 280 */ #define EEPROM_REGULATORY_BAND_4_CHANNELS (2*0x8D) /* 22 bytes */ - struct iwl4965_eeprom_channel band_4_channels[11]; /* abs.ofs: 282 */ + struct iwl4965_eeprom_channel band_4_channels[11]; /* abs.ofs: 282 */ + +/* + * 5.7 GHz channels 145, 149, 153, 157, 161, 165 + * (5725-5825MHz) + */ #define EEPROM_REGULATORY_BAND_5 (2*0x98) /* 2 bytes */ u16 band_5_count; /* abs.ofs: 304 */ #define EEPROM_REGULATORY_BAND_5_CHANNELS (2*0x99) /* 12 bytes */ - struct iwl4965_eeprom_channel band_5_channels[6]; /* abs.ofs: 306 */ + struct iwl4965_eeprom_channel band_5_channels[6]; /* abs.ofs: 306 */ u8 reserved10[2]; + + +/* + * 2.4 GHz FAT channels 1 (5), 2 (6), 3 (7), 4 (8), 5 (9), 6 (10), 7 (11) + * + * The channel listed is the center of the lower 20 MHz half of the channel. + * The overall center frequency is actually 2 channels (10 MHz) above that, + * and the upper half of each FAT channel is centered 4 channels (20 MHz) away + * from the lower half; e.g. the upper half of FAT channel 1 is channel 5, + * and the overall FAT channel width centers on channel 3. + * + * NOTE: The RXON command uses 20 MHz channel numbers to specify the + * control channel to which to tune. RXON also specifies whether the + * control channel is the upper or lower half of a FAT channel. + * + * NOTE: 4965 does not support FAT channels on 2.4 GHz. + */ #define EEPROM_REGULATORY_BAND_24_FAT_CHANNELS (2*0xA0) /* 14 bytes */ - struct iwl4965_eeprom_channel band_24_channels[7]; /* abs.ofs: 320 */ + struct iwl4965_eeprom_channel band_24_channels[7]; /* abs.ofs: 320 */ u8 reserved11[2]; + +/* + * 5.2 GHz FAT channels 36 (40), 44 (48), 52 (56), 60 (64), + * 100 (104), 108 (112), 116 (120), 124 (128), 132 (136), 149 (153), 157 (161) + */ #define EEPROM_REGULATORY_BAND_52_FAT_CHANNELS (2*0xA8) /* 22 bytes */ - struct iwl4965_eeprom_channel band_52_channels[11]; /* abs.ofs: 336 */ + struct iwl4965_eeprom_channel band_52_channels[11]; /* abs.ofs: 336 */ u8 reserved12[6]; + +/* + * 4965 driver requires txpower calibration format version 5 or greater. + * Driver does not work with txpower calibration version < 5. + * This value is simply a 16-bit number, no major/minor versions here. + */ #define EEPROM_CALIB_VERSION_OFFSET (2*0xB6) /* 2 bytes */ u16 calib_version; /* abs.ofs: 364 */ u8 reserved13[2]; + #define EEPROM_SATURATION_POWER_OFFSET (2*0xB8) /* 2 bytes */ u16 satruation_power; /* abs.ofs: 368 */ u8 reserved14[94]; + +/* + * 4965 Txpower calibration data. + */ #define EEPROM_IWL_CALIB_TXPOWER_OFFSET (2*0xE8) /* 48 bytes */ struct iwl4965_eeprom_calib_info calib_info; /* abs.ofs: 464 */ @@ -317,6 +479,7 @@ struct iwl4965_eeprom { #define IWL_EEPROM_IMAGE_SIZE 1024 +/* End of EEPROM */ #include "iwl-4965-commands.h" diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index 5dee8e512c7d..7d95de9d034a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -4687,14 +4687,23 @@ struct pci_device_id iwl4965_hw_card_ids[] = { {0} }; +/* + * The device's EEPROM semaphore prevents conflicts between driver and uCode + * when accessing the EEPROM; each access is a series of pulses to/from the + * EEPROM chip, not a single event, so even reads could conflict if they + * weren't arbitrated by the semaphore. + */ int iwl4965_eeprom_acquire_semaphore(struct iwl4965_priv *priv) { u16 count; int rc; for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { + /* Request semaphore */ iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); + + /* See if we got it */ rc = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, |