Add support for the symbol duration in the softMAC hwsim driver. The symbol
durations are provided in micro-seconds and are extracted from the IEEE
802.15.4 specification thanks to the other parameters and comments from
this driver.
Some of these durations are hard to find/derive, so they are left to 1
in order to avoid null values (for the upcoming changes related to
scanning). In this case a comment is stating that the value in unknown.
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
drivers/net/ieee802154/mac802154_hwsim.c | 70 ++++++++++++++++++++++++
1 file changed, 70 insertions(+)
diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
index b1a4ee7dceda..38be88db5f7a 100644
--- a/drivers/net/ieee802154/mac802154_hwsim.c
+++ b/drivers/net/ieee802154/mac802154_hwsim.c
@@ -92,6 +92,7 @@ static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
{
struct hwsim_phy *phy = hw->priv;
struct hwsim_pib *pib, *pib_old;
+ int ret = 0;
pib = kzalloc(sizeof(*pib), GFP_KERNEL);
if (!pib)
@@ -99,6 +100,75 @@ static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
pib->page = page;
pib->channel = channel;
+ switch (page) {
+ case 0:
+ if (BIT(channel) & 0x1)
+ /* 868 MHz BPSK 802.15.4-2003: 20 ksym/s */
+ hw->phy->symbol_duration = 50;
+ else if (BIT(channel) & 0x7fe)
+ /* 915 MHz BPSK 802.15.4-2003: 40 ksym/s */
+ hw->phy->symbol_duration = 25;
+ else if (BIT(channel) & 0x7FFF800)
+ /* 2.4 GHz O-QPSK 802.15.4-2003: 62.5 ksym/s */
+ hw->phy->symbol_duration = 16;
+ else
+ ret = -EINVAL;
+ break;
+ case 1:
+ if (BIT(channel) & (0x1 | 0x7fe))
+ /* unknown rate */
+ hw->phy->symbol_duration = 1;
+ else
+ ret = -EINVAL;
+ break;
+ case 2:
+ if (BIT(channel) & 0x1)
+ /* 868 MHz O-QPSK 802.15.4-2006: 25 ksym/s */
+ hw->phy->symbol_duration = 40;
+ else if (BIT(channel) & 0x7fe)
+ /* 915 MHz O-QPSK 802.15.4-2006: 62.5 ksym/s */
+ hw->phy->symbol_duration = 16;
+ else
+ ret = -EINVAL;
+ break;
+ case 3:
+ if (BIT(channel) & 0x3fff)
+ /* 2.4 GHz CSS 802.15.4a-2007: 1/6 Msym/s */
+ hw->phy->symbol_duration = 6;
+ else
+ ret = -EINVAL;
+ break;
+ case 4:
+ if (BIT(channel) & (0x1 | 0x1e | 0xffe0))
+ /* UWB 802.15.4a-2007: 993.6 or 1017.6 or 3974.4 us */
+ hw->phy->symbol_duration = 1;
+ else
+ ret = -EINVAL;
+ break;
+ case 5:
+ if (BIT(channel) & (0xf | 0xf0))
+ /* unknown rate */
+ hw->phy->symbol_duration = 1;
+ else
+ ret = -EINVAL;
+ break;
+ case 6:
+ if (BIT(channel) & (0x3ff | 0x3ffc00))
+ /* unknown rate */
+ hw->phy->symbol_duration = 1;
+ else
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ if (ret) {
+ dev_err(hw->parent, "Invalid channel %d on page %d\n",
+ page, channel);
+ kfree(pib);
+ return ret;
+ }
pib_old = rtnl_dereference(phy->pib);
rcu_assign_pointer(phy->pib, pib);
--
2.27.0
