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at86rf230: rework tx cca energy detection level 

This patch reworks the cca energy detection level handling. This
contains a calculation which works on all transceiver types and
add support for dump cca energy detection levels.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Alexander Aring 2015-05-17 21:44:50 +02:00 committed by Marcel Holtmann
parent 6f4da3f897
commit 2d9fe7ab37
1 changed files with 59 additions and 20 deletions
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79
drivers/net/ieee802154/at86rf230.c
View File

@ -50,7 +50,6 @@ struct at86rf2xx_chip_data {
int rssi_base_val;
int (*set_channel)(struct at86rf230_local *, u8, u8);
int (*get_desense_steps)(struct at86rf230_local *, s32);
int (*set_txpower)(struct at86rf230_local *, s32);
};
@ -1080,6 +1079,50 @@ at86rf23x_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
return at86rf230_write_subreg(lp, SR_CHANNEL, channel);
}
#define AT86RF2XX_MAX_ED_LEVELS 0xF
static const s32 at86rf23x_ed_levels[AT86RF2XX_MAX_ED_LEVELS + 1] = {
-9100, -8900, -8700, -8500, -8300, -8100, -7900, -7700, -7500, -7300,
-7100, -6900, -6700, -6500, -6300, -6100,
};
static const s32 at86rf212_ed_levels_100[AT86RF2XX_MAX_ED_LEVELS + 1] = {
-10000, -9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200,
-8000, -7800, -7600, -7400, -7200,
};
static const s32 at86rf212_ed_levels_98[AT86RF2XX_MAX_ED_LEVELS + 1] = {
-9800, -9600, -9400, -9200, -9000, -8800, -8600, -8400, -8200, -8000,
-7800, -7600, -7400, -7200, -7000,
};
static inline int
at86rf212_update_cca_ed_level(struct at86rf230_local *lp, int rssi_base_val)
{
unsigned int cca_ed_thres;
int rc;
rc = at86rf230_read_subreg(lp, SR_CCA_ED_THRES, &cca_ed_thres);
if (rc < 0)
return rc;
switch (rssi_base_val) {
case -98:
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_98;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_98);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_98[cca_ed_thres];
break;
case -100:
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
lp->hw->phy->cca_ed_level = at86rf212_ed_levels_100[cca_ed_thres];
break;
default:
WARN_ON(1);
}
return 0;
}
static int
at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
{
@ -1102,6 +1145,10 @@ at86rf212_set_channel(struct at86rf230_local *lp, u8 page, u8 channel)
if (rc < 0)
return rc;
rc = at86rf212_update_cca_ed_level(lp, lp->data->rssi_base_val);
if (rc < 0)
return rc;
/* This sets the symbol_duration according frequency on the 212.
* TODO move this handling while set channel and page in cfg802154.
* We can do that, this timings are according 802.15.4 standard.
@ -1291,29 +1338,19 @@ at86rf230_set_cca_mode(struct ieee802154_hw *hw,
return at86rf230_write_subreg(lp, SR_CCA_MODE, val);
}
static int
at86rf212_get_desens_steps(struct at86rf230_local *lp, s32 level)
{
return (level - lp->data->rssi_base_val) * 100 / 207;
}
static int
at86rf23x_get_desens_steps(struct at86rf230_local *lp, s32 level)
{
return (level - lp->data->rssi_base_val) / 2;
}
static int
at86rf230_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm)
{
struct at86rf230_local *lp = hw->priv;
s32 level = mbm / 100;
u32 i;
if (level < lp->data->rssi_base_val || level > 30)
return -EINVAL;
for (i = 0; i < hw->phy->supported.cca_ed_levels_size; i++) {
if (hw->phy->supported.cca_ed_levels[i] == mbm)
return at86rf230_write_subreg(lp, SR_CCA_ED_THRES, i);
}
return at86rf230_write_subreg(lp, SR_CCA_ED_THRES,
lp->data->get_desense_steps(lp, level));
return -EINVAL;
}
static int
@ -1403,7 +1440,6 @@ static struct at86rf2xx_chip_data at86rf233_data = {
.t_p_ack = 545,
.rssi_base_val = -91,
.set_channel = at86rf23x_set_channel,
.get_desense_steps = at86rf23x_get_desens_steps,
.set_txpower = at86rf23x_set_txpower,
};
@ -1417,7 +1453,6 @@ static struct at86rf2xx_chip_data at86rf231_data = {
.t_p_ack = 545,
.rssi_base_val = -91,
.set_channel = at86rf23x_set_channel,
.get_desense_steps = at86rf23x_get_desens_steps,
.set_txpower = at86rf23x_set_txpower,
};
@ -1431,7 +1466,6 @@ static struct at86rf2xx_chip_data at86rf212_data = {
.t_p_ack = 545,
.rssi_base_val = -100,
.set_channel = at86rf212_set_channel,
.get_desense_steps = at86rf212_get_desens_steps,
.set_txpower = at86rf212_set_txpower,
};
@ -1618,6 +1652,9 @@ at86rf230_detect_device(struct at86rf230_local *lp)
lp->hw->phy->supported.cca_opts = BIT(NL802154_CCA_OPT_ENERGY_CARRIER_AND) |
BIT(NL802154_CCA_OPT_ENERGY_CARRIER_OR);
lp->hw->phy->supported.cca_ed_levels = at86rf23x_ed_levels;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf23x_ed_levels);
lp->hw->phy->cca.mode = NL802154_CCA_ENERGY;
switch (part) {
@ -1645,6 +1682,8 @@ at86rf230_detect_device(struct at86rf230_local *lp)
lp->hw->phy->supported.lbt = NL802154_SUPPORTED_BOOL_BOTH;
lp->hw->phy->supported.tx_powers = at86rf212_powers;
lp->hw->phy->supported.tx_powers_size = ARRAY_SIZE(at86rf212_powers);
lp->hw->phy->supported.cca_ed_levels = at86rf212_ed_levels_100;
lp->hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(at86rf212_ed_levels_100);
break;
case 11:
chip = "at86rf233";