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iwlwifi: add support for getting HW address from CSR

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From 9000 family on, we need to get HW address from host
CSR registers.
OEM can override it by fusing the override registers - read
those first, and if those are 0 - read the OTP registers instead.

In addition - bail out if no valid mac address is present. Make
it shared for all NICs.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Sara Sharon 2016-03-07 14:18:29 +02:00 committed by Emmanuel Grumbach
parent 7b5424361e
commit 17c867bfe8
4 changed files with 67 additions and 21 deletions
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3
drivers/net/wireless/intel/iwlwifi/iwl-9000.c
View File

@ -140,7 +140,8 @@ static const struct iwl_tt_params iwl9000_tt_params = {
.thermal_params = &iwl9000_tt_params, \
.apmg_not_supported = true, \
.mq_rx_supported = true, \
.vht_mu_mimo_supported = true
.vht_mu_mimo_supported = true, \
.mac_addr_from_csr = true
const struct iwl_cfg iwl9260_2ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC 9260",

2
drivers/net/wireless/intel/iwlwifi/iwl-config.h
View File

@ -297,6 +297,7 @@ struct iwl_pwr_tx_backoff {
* @host_interrupt_operation_mode: device needs host interrupt operation
* mode set
* @nvm_hw_section_num: the ID of the HW NVM section
* @mac_addr_from_csr: read HW address from CSR registers
* @features: hw features, any combination of feature_whitelist
* @pwr_tx_backoffs: translation table between power limits and backoffs
* @max_rx_agg_size: max RX aggregation size of the ADDBA request/response
@ -345,6 +346,7 @@ struct iwl_cfg {
const bool host_interrupt_operation_mode;
bool high_temp;
u8 nvm_hw_section_num;
bool mac_addr_from_csr;
bool lp_xtal_workaround;
const struct iwl_pwr_tx_backoff *pwr_tx_backoffs;
bool no_power_up_nic_in_init;

10
drivers/net/wireless/intel/iwlwifi/iwl-csr.h
View File

@ -598,4 +598,14 @@ enum msix_hw_int_causes {
#define MSIX_AUTO_CLEAR_CAUSE 0
#define MSIX_NON_AUTO_CLEAR_CAUSE BIT(7)
/*****************************************************************************
* HW address related registers *
*****************************************************************************/
#define CSR_ADDR_BASE (0x380)
#define CSR_MAC_ADDR0_OTP (CSR_ADDR_BASE)
#define CSR_MAC_ADDR1_OTP (CSR_ADDR_BASE + 4)
#define CSR_MAC_ADDR0_STRAP (CSR_ADDR_BASE + 8)
#define CSR_MAC_ADDR1_STRAP (CSR_ADDR_BASE + 0xC)
#endif /* !__iwl_csr_h__ */

73
drivers/net/wireless/intel/iwlwifi/iwl-nvm-parse.c
View File

@ -71,6 +71,8 @@
#include "iwl-modparams.h"
#include "iwl-nvm-parse.h"
#include "iwl-prph.h"
#include "iwl-io.h"
#include "iwl-csr.h"
/* NVM offsets (in words) definitions */
enum wkp_nvm_offsets {
@ -524,6 +526,36 @@ static void iwl_set_radio_cfg(const struct iwl_cfg *cfg,
data->valid_rx_ant = NVM_RF_CFG_RX_ANT_MSK_FAMILY_8000(radio_cfg);
}
static void iwl_flip_hw_address(__le32 mac_addr0, __le32 mac_addr1, u8 *dest)
{
const u8 *hw_addr;
hw_addr = (const u8 *)&mac_addr0;
dest[0] = hw_addr[3];
dest[1] = hw_addr[2];
dest[2] = hw_addr[1];
dest[3] = hw_addr[0];
hw_addr = (const u8 *)&mac_addr1;
dest[4] = hw_addr[1];
dest[5] = hw_addr[0];
}
static void iwl_set_hw_address_from_csr(struct iwl_trans *trans,
struct iwl_nvm_data *data)
{
__le32 mac_addr0 = cpu_to_le32(iwl_read32(trans, CSR_MAC_ADDR0_STRAP));
__le32 mac_addr1 = cpu_to_le32(iwl_read32(trans, CSR_MAC_ADDR1_STRAP));
/* If OEM did not fuse address - get it from OTP */
if (!mac_addr0 && !mac_addr1) {
mac_addr0 = cpu_to_le32(iwl_read32(trans, CSR_MAC_ADDR0_OTP));
mac_addr1 = cpu_to_le32(iwl_read32(trans, CSR_MAC_ADDR1_OTP));
}
iwl_flip_hw_address(mac_addr0, mac_addr1, data->hw_addr);
}
static void iwl_set_hw_address_family_8000(struct iwl_trans *trans,
const struct iwl_cfg *cfg,
struct iwl_nvm_data *data,
@ -564,21 +596,8 @@ static void iwl_set_hw_address_family_8000(struct iwl_trans *trans,
WFMP_MAC_ADDR_0));
__le32 mac_addr1 = cpu_to_le32(iwl_trans_read_prph(trans,
WFMP_MAC_ADDR_1));
/* read the MAC address from HW resisters */
hw_addr = (const u8 *)&mac_addr0;
data->hw_addr[0] = hw_addr[3];
data->hw_addr[1] = hw_addr[2];
data->hw_addr[2] = hw_addr[1];
data->hw_addr[3] = hw_addr[0];
hw_addr = (const u8 *)&mac_addr1;
data->hw_addr[4] = hw_addr[1];
data->hw_addr[5] = hw_addr[0];
if (!is_valid_ether_addr(data->hw_addr))
IWL_ERR(trans,
"mac address (%pM) from hw section is not valid\n",
data->hw_addr);
iwl_flip_hw_address(mac_addr0, mac_addr1, data->hw_addr);
return;
}
@ -586,12 +605,14 @@ static void iwl_set_hw_address_family_8000(struct iwl_trans *trans,
IWL_ERR(trans, "mac address is not found\n");
}
static void iwl_set_hw_address(struct iwl_trans *trans,
const struct iwl_cfg *cfg,
struct iwl_nvm_data *data, const __le16 *nvm_hw,
const __le16 *mac_override)
static int iwl_set_hw_address(struct iwl_trans *trans,
const struct iwl_cfg *cfg,
struct iwl_nvm_data *data, const __le16 *nvm_hw,
const __le16 *mac_override)
{
if (cfg->device_family != IWL_DEVICE_FAMILY_8000) {
if (cfg->mac_addr_from_csr) {
iwl_set_hw_address_from_csr(trans, data);
} else if (cfg->device_family != IWL_DEVICE_FAMILY_8000) {
const u8 *hw_addr = (const u8 *)(nvm_hw + HW_ADDR);
/* The byte order is little endian 16 bit, meaning 214365 */
@ -605,6 +626,13 @@ static void iwl_set_hw_address(struct iwl_trans *trans,
iwl_set_hw_address_family_8000(trans, cfg, data,
mac_override, nvm_hw);
}
if (!is_valid_ether_addr(data->hw_addr)) {
IWL_ERR(trans, "no valid mac address was found\n");
return -EINVAL;
}
return 0;
}
struct iwl_nvm_data *
@ -680,7 +708,12 @@ iwl_parse_nvm_data(struct iwl_trans *trans, const struct iwl_cfg *cfg,
ch_section = regulatory;
}
iwl_set_hw_address(trans, cfg, data, nvm_hw, mac_override);
/* If no valid mac address was found - bail out */
if (iwl_set_hw_address(trans, cfg, data, nvm_hw, mac_override)) {
kfree(data);
return NULL;
}
iwl_init_sbands(dev, cfg, data, ch_section, tx_chains, rx_chains,
lar_fw_supported && lar_enabled);
data->calib_version = 255;