ieee802154/atusb: Add .set_txpower operation to the driver

Atusb uses the at86rf231 transceiver so we can use the same calculation
for txpower settings for it.

Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Acked-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/net/ieee802154/atusb.c b/drivers/net/ieee802154/atusb.c
index 95d42205fd53..9805ebeccd75 100644
--- a/drivers/net/ieee802154/atusb.c
+++ b/drivers/net/ieee802154/atusb.c
@@ -453,6 +453,26 @@ static void atusb_stop(struct ieee802154_hw *hw)
         atusb_get_and_clear_error(atusb);
 }
 
+#define ATUSB_MAX_TX_POWERS 0xF
+static const s32 atusb_powers[ATUSB_MAX_TX_POWERS + 1] = {
+        300, 280, 230, 180, 130, 70, 0, -100, -200, -300, -400, -500, -700,
+        -900, -1200, -1700,
+};
+
+static int
+atusb_set_txpower(struct ieee802154_hw *hw, s32 mbm)
+{
+        struct atusb *atusb = hw->priv;
+        u32 i;
+
+        for (i = 0; i < hw->phy->supported.tx_powers_size; i++) {
+                if (hw->phy->supported.tx_powers[i] == mbm)
+                        return atusb_write_subreg(atusb, SR_TX_PWR_23X, i);
+        }
+
+        return -EINVAL;
+}
+
 static struct ieee802154_ops atusb_ops = {
         .owner                  = THIS_MODULE,
         .xmit_async             = atusb_xmit,
@@ -461,6 +481,7 @@ static struct ieee802154_ops atusb_ops = {
         .start                  = atusb_start,
         .stop                   = atusb_stop,
         .set_hw_addr_filt       = atusb_set_hw_addr_filt,
+        .set_txpower            = atusb_set_txpower,
 };
 
 /* ----- Firmware and chip version information ----------------------------- */
@@ -581,9 +602,14 @@ static int atusb_probe(struct usb_interface *interface,
         hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
                     IEEE802154_HW_AACK;
 
+        hw->phy->flags = WPAN_PHY_FLAG_TXPOWER;
+
         hw->phy->current_page = 0;
         hw->phy->current_channel = 11;  /* reset default */
         hw->phy->supported.channels[0] = 0x7FFF800;
+        hw->phy->supported.tx_powers = atusb_powers;
+        hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
+        hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
         ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
 
         atusb_command(atusb, ATUSB_RF_RESET, 0);