iwlwifi: split the drivers for agn and legacy devices 3945/4965

Intel WiFi devices 3945 and 4965 now have their own driver in the folder

	drivers/net/wireless/iwlegacy

Add support to build these drivers independently of the driver for
AGN devices. Selecting the 3945 builds iwl3945.ko and iwl_legacy.ko,
and selecting the 4965 builds iwl4965.ko and iwl_legacy.ko. iwl-legacy.ko
contains code shared between both devices.

The 3945 is an ABG/BG device, with no support for 802.11n. The 4965 is a 2x3
ABGN device.

Signed-off-by: Meenakshi Venkataraman <meenakshi.venkataraman@intel.com>
Acked-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

1 files changed, 165 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlegacy/iwl-power.c b/drivers/net/wireless/iwlegacy/iwl-power.c
new file mode 100644
index 000000000000..903ef0d6d6cb
--- /dev/null
+++ b/drivers/net/wireless/iwlegacy/iwl-power.c
@@ -0,0 +1,165 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project, as well
+ * as portions of the ieee80211 subsystem header files.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
+ *
+ * The full GNU General Public License is included in this distribution in the
+ * file called LICENSE.
+ *
+ * Contact Information:
+ *  Intel Linux Wireless <ilw@linux.intel.com>
+ * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
+ *****************************************************************************/
+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+#include <net/mac80211.h>
+
+#include "iwl-eeprom.h"
+#include "iwl-dev.h"
+#include "iwl-core.h"
+#include "iwl-io.h"
+#include "iwl-commands.h"
+#include "iwl-debug.h"
+#include "iwl-power.h"
+
+/*
+ * Setting power level allows the card to go to sleep when not busy.
+ *
+ * We calculate a sleep command based on the required latency, which
+ * we get from mac80211. In order to handle thermal throttling, we can
+ * also use pre-defined power levels.
+ */
+
+/*
+ * This defines the old power levels. They are still used by default
+ * (level 1) and for thermal throttle (levels 3 through 5)
+ */
+
+struct iwl_power_vec_entry {
+	struct iwl_powertable_cmd cmd;
+	u8 no_dtim;	/* number of skip dtim */
+};
+
+static void iwl_legacy_power_sleep_cam_cmd(struct iwl_priv *priv,
+				    struct iwl_powertable_cmd *cmd)
+{
+	memset(cmd, 0, sizeof(*cmd));
+
+	if (priv->power_data.pci_pm)
+		cmd->flags |= IWL_POWER_PCI_PM_MSK;
+
+	IWL_DEBUG_POWER(priv, "Sleep command for CAM\n");
+}
+
+static int
+iwl_legacy_set_power(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd)
+{
+	IWL_DEBUG_POWER(priv, "Sending power/sleep command\n");
+	IWL_DEBUG_POWER(priv, "Flags value = 0x%08X\n", cmd->flags);
+	IWL_DEBUG_POWER(priv, "Tx timeout = %u\n",
+					le32_to_cpu(cmd->tx_data_timeout));
+	IWL_DEBUG_POWER(priv, "Rx timeout = %u\n",
+					le32_to_cpu(cmd->rx_data_timeout));
+	IWL_DEBUG_POWER(priv,
+			"Sleep interval vector = { %d , %d , %d , %d , %d }\n",
+			le32_to_cpu(cmd->sleep_interval[0]),
+			le32_to_cpu(cmd->sleep_interval[1]),
+			le32_to_cpu(cmd->sleep_interval[2]),
+			le32_to_cpu(cmd->sleep_interval[3]),
+			le32_to_cpu(cmd->sleep_interval[4]));
+
+	return iwl_legacy_send_cmd_pdu(priv, POWER_TABLE_CMD,
+				sizeof(struct iwl_powertable_cmd), cmd);
+}
+
+int
+iwl_legacy_power_set_mode(struct iwl_priv *priv, struct iwl_powertable_cmd *cmd,
+		       bool force)
+{
+	int ret;
+	bool update_chains;
+
+	lockdep_assert_held(&priv->mutex);
+
+	/* Don't update the RX chain when chain noise calibration is running */
+	update_chains = priv->chain_noise_data.state == IWL_CHAIN_NOISE_DONE ||
+			priv->chain_noise_data.state == IWL_CHAIN_NOISE_ALIVE;
+
+	if (!memcmp(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd)) && !force)
+		return 0;
+
+	if (!iwl_legacy_is_ready_rf(priv))
+		return -EIO;
+
+	/* scan complete use sleep_power_next, need to be updated */
+	memcpy(&priv->power_data.sleep_cmd_next, cmd, sizeof(*cmd));
+	if (test_bit(STATUS_SCANNING, &priv->status) && !force) {
+		IWL_DEBUG_INFO(priv, "Defer power set mode while scanning\n");
+		return 0;
+	}
+
+	if (cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK)
+		set_bit(STATUS_POWER_PMI, &priv->status);
+
+	ret = iwl_legacy_set_power(priv, cmd);
+	if (!ret) {
+		if (!(cmd->flags & IWL_POWER_DRIVER_ALLOW_SLEEP_MSK))
+			clear_bit(STATUS_POWER_PMI, &priv->status);
+
+		if (priv->cfg->ops->lib->update_chain_flags && update_chains)
+			priv->cfg->ops->lib->update_chain_flags(priv);
+		else if (priv->cfg->ops->lib->update_chain_flags)
+			IWL_DEBUG_POWER(priv,
+					"Cannot update the power, chain noise "
+					"calibration running: %d\n",
+					priv->chain_noise_data.state);
+
+		memcpy(&priv->power_data.sleep_cmd, cmd, sizeof(*cmd));
+	} else
+		IWL_ERR(priv, "set power fail, ret = %d", ret);
+
+	return ret;
+}
+
+int iwl_legacy_power_update_mode(struct iwl_priv *priv, bool force)
+{
+	struct iwl_powertable_cmd cmd;
+
+	iwl_legacy_power_sleep_cam_cmd(priv, &cmd);
+	return iwl_legacy_power_set_mode(priv, &cmd, force);
+}
+EXPORT_SYMBOL(iwl_legacy_power_update_mode);
+
+/* initialize to default */
+void iwl_legacy_power_initialize(struct iwl_priv *priv)
+{
+	u16 lctl = iwl_legacy_pcie_link_ctl(priv);
+
+	priv->power_data.pci_pm = !(lctl & PCI_CFG_LINK_CTRL_VAL_L0S_EN);
+
+	priv->power_data.debug_sleep_level_override = -1;
+
+	memset(&priv->power_data.sleep_cmd, 0,
+		sizeof(priv->power_data.sleep_cmd));
+}
+EXPORT_SYMBOL(iwl_legacy_power_initialize);