David Lin <[email protected]> writes:
> The Linux driver for WRT1900AC. The work was initially developed as part of
> openwrt effort and maintained on https://github.com/kaloz/mwlwifi.
>
> This is still work in progress, with 8864 chipset more mature and tested,
> while 8897 for the similar use case is added recently.
>
> Signed-off-by: David Lin <[email protected]>
[...]
> +static void mwl_reg_notifier(struct wiphy *wiphy,
> + struct regulatory_request *request)
> +{
> +#ifdef CONFIG_OF
> + struct ieee80211_hw *hw;
> + struct mwl_priv *priv;
> + struct property *prop;
> + struct property *fcc_prop = NULL;
> + struct property *etsi_prop = NULL;
> + struct property *specific_prop = NULL;
> + u32 prop_value;
> + int i, j, k;
> +
> + hw = (struct ieee80211_hw *)wiphy_priv(wiphy);
> + priv = hw->priv;
> +
> + if (priv->pwr_node) {
> + for_each_property_of_node(priv->pwr_node, prop) {
> + if (strcmp(prop->name, "FCC") == 0)
> + fcc_prop = prop;
> + if (strcmp(prop->name, "ETSI") == 0)
> + etsi_prop = prop;
> + if ((prop->name[0] == request->alpha2[0]) &&
> + (prop->name[1] == request->alpha2[1]))
> + specific_prop = prop;
> + }
> +
> + prop = NULL;
> +
> + if (specific_prop) {
> + prop = specific_prop;
> + } else {
> + if (request->dfs_region == NL80211_DFS_ETSI)
> + prop = etsi_prop;
> + else
> + prop = fcc_prop;
> + }
> +
> + if (prop) {
> + /* Reset the whole table */
> + for (i = 0; i < SYSADPT_MAX_NUM_CHANNELS; i++)
> + memset(&priv->tx_pwr_tbl[i], 0,
> + sizeof(struct mwl_tx_pwr_tbl));
> +
> + /* Load related power table */
> + i = 0;
> + j = 0;
> + while (i < prop->length) {
> + prop_value =
> + be32_to_cpu(*(__be32 *)
> + (prop->value + i));
> + priv->tx_pwr_tbl[j].channel = prop_value;
> + i += 4;
> + prop_value =
> + be32_to_cpu(*(__be32 *)
> + (prop->value + i));
> + priv->tx_pwr_tbl[j].setcap = prop_value;
> + i += 4;
> + for (k = 0; k < SYSADPT_TX_POWER_LEVEL_TOTAL;
> + k++) {
> + prop_value =
> + be32_to_cpu(*(__be32 *)
> + (prop->value + i));
> + priv->tx_pwr_tbl[j].tx_power[k] =
> + prop_value;
> + i += 4;
> + }
> + prop_value =
> + be32_to_cpu(*(__be32 *)
> + (prop->value + i));
> + priv->tx_pwr_tbl[j].cdd =
> + (prop_value == 0) ? false : true;
> + i += 4;
> + prop_value =
> + be32_to_cpu(*(__be32 *)
> + (prop->value + i));
> + priv->tx_pwr_tbl[j].txantenna2 = prop_value;
> + i += 4;
> + j++;
> + }
> +
> + /* Dump loaded power tabel */
> + wiphy_info(hw->wiphy, "%s: %s\n", dev_name(&wiphy->dev),
> + prop->name);
> + for (i = 0; i < SYSADPT_MAX_NUM_CHANNELS; i++) {
> + struct mwl_tx_pwr_tbl *pwr_tbl;
> + char disp_buf[64];
> + char *disp_ptr;
> +
> + pwr_tbl = &priv->tx_pwr_tbl[i];
> + if (pwr_tbl->channel == 0)
> + break;
> + wiphy_info(hw->wiphy,
> + "Channel: %d: 0x%x 0x%x 0x%x\n",
> + pwr_tbl->channel,
> + pwr_tbl->setcap,
> + pwr_tbl->cdd,
> + pwr_tbl->txantenna2);
> + disp_ptr = disp_buf;
> + for (j = 0; j < SYSADPT_TX_POWER_LEVEL_TOTAL;
> + j++) {
> + disp_ptr +=
> + sprintf(disp_ptr, "%x ",
> + pwr_tbl->tx_power[j]);
> + }
> + wiphy_info(hw->wiphy, "%s\n", disp_buf);
> + }
> + }
> + }
> +#endif
> +}
> +
> +static void mwl_process_of_dts(struct mwl_priv *priv)
> +{
> +#ifdef CONFIG_OF
> + struct property *prop;
> + u32 prop_value;
> +
> + priv->dt_node =
> + of_find_node_by_name(pci_bus_to_OF_node(priv->pdev->bus),
> + "mwlwifi");
> + if (!priv->dt_node)
> + return;
> +
> + /* look for all matching property names */
> + for_each_property_of_node(priv->dt_node, prop) {
> + if (strcmp(prop->name, "marvell,2ghz") == 0)
> + priv->disable_2g = true;
> + if (strcmp(prop->name, "marvell,5ghz") == 0)
> + priv->disable_5g = true;
> + if (strcmp(prop->name, "marvell,chainmask") == 0) {
> + prop_value = be32_to_cpu(*((__be32 *)prop->value));
> + if (prop_value == 2)
> + priv->antenna_tx = ANTENNA_TX_2;
> +
> + prop_value = be32_to_cpu(*((__be32 *)
> + (prop->value + 4)));
> + if (prop_value == 2)
> + priv->antenna_rx = ANTENNA_RX_2;
> + }
> + }
> +
> + priv->pwr_node = of_find_node_by_name(priv->dt_node,
> + "marvell,powertable");
> +#endif
> +}
The device tree bindings need a proper document in
Documentation/devicetree/bindings and reviewed by the device tree folks.
That might take some time as I suspect having something like regdomain
in DT will be problematic, so I recommend to take this out from initial
submission and resend later once properly acked by the device tree
maintainers.
--
Kalle Valo
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