Initial import

1 files changed, 266 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-io.c b/drivers/net/wireless/iwlwifi/iwl-io.c
new file mode 100644
index 000000000..27c66e477
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/iwl-io.c
@@ -0,0 +1,266 @@
+/******************************************************************************
+ *
+ * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
+ *
+ * Portions of this file are derived from the ipw3945 project.
+ *
+ * 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/delay.h>
+#include <linux/device.h>
+#include <linux/export.h>
+
+#include "iwl-drv.h"
+#include "iwl-io.h"
+#include "iwl-csr.h"
+#include "iwl-debug.h"
+#include "iwl-prph.h"
+#include "iwl-fh.h"
+
+#define IWL_POLL_INTERVAL 10	/* microseconds */
+
+int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
+		 u32 bits, u32 mask, int timeout)
+{
+	int t = 0;
+
+	do {
+		if ((iwl_read32(trans, addr) & mask) == (bits & mask))
+			return t;
+		udelay(IWL_POLL_INTERVAL);
+		t += IWL_POLL_INTERVAL;
+	} while (t < timeout);
+
+	return -ETIMEDOUT;
+}
+IWL_EXPORT_SYMBOL(iwl_poll_bit);
+
+u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
+{
+	u32 value = 0x5a5a5a5a;
+	unsigned long flags;
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		value = iwl_read32(trans, reg);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+
+	return value;
+}
+IWL_EXPORT_SYMBOL(iwl_read_direct32);
+
+void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
+{
+	unsigned long flags;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		iwl_write32(trans, reg, value);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_write_direct32);
+
+int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
+			int timeout)
+{
+	int t = 0;
+
+	do {
+		if ((iwl_read_direct32(trans, addr) & mask) == mask)
+			return t;
+		udelay(IWL_POLL_INTERVAL);
+		t += IWL_POLL_INTERVAL;
+	} while (t < timeout);
+
+	return -ETIMEDOUT;
+}
+IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
+
+u32 __iwl_read_prph(struct iwl_trans *trans, u32 ofs)
+{
+	u32 val = iwl_trans_read_prph(trans, ofs);
+	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
+	return val;
+}
+
+void __iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
+{
+	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
+	iwl_trans_write_prph(trans, ofs, val);
+}
+
+u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
+{
+	unsigned long flags;
+	u32 val = 0x5a5a5a5a;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		val = __iwl_read_prph(trans, ofs);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+	return val;
+}
+IWL_EXPORT_SYMBOL(iwl_read_prph);
+
+void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
+{
+	unsigned long flags;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		__iwl_write_prph(trans, ofs, val);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_write_prph);
+
+int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
+		      u32 bits, u32 mask, int timeout)
+{
+	int t = 0;
+
+	do {
+		if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
+			return t;
+		udelay(IWL_POLL_INTERVAL);
+		t += IWL_POLL_INTERVAL;
+	} while (t < timeout);
+
+	return -ETIMEDOUT;
+}
+
+void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
+{
+	unsigned long flags;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		__iwl_write_prph(trans, ofs,
+				 __iwl_read_prph(trans, ofs) | mask);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
+
+void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
+			    u32 bits, u32 mask)
+{
+	unsigned long flags;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		__iwl_write_prph(trans, ofs,
+				 (__iwl_read_prph(trans, ofs) & mask) | bits);
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
+
+void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
+{
+	unsigned long flags;
+	u32 val;
+
+	if (iwl_trans_grab_nic_access(trans, false, &flags)) {
+		val = __iwl_read_prph(trans, ofs);
+		__iwl_write_prph(trans, ofs, (val & ~mask));
+		iwl_trans_release_nic_access(trans, &flags);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
+
+void iwl_force_nmi(struct iwl_trans *trans)
+{
+	if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
+		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
+			       DEVICE_SET_NMI_VAL_DRV);
+		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
+			       DEVICE_SET_NMI_VAL_HW);
+	} else {
+		iwl_write_prph(trans, DEVICE_SET_NMI_8000_REG,
+			       DEVICE_SET_NMI_8000_VAL);
+		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
+			       DEVICE_SET_NMI_VAL_DRV);
+	}
+}
+IWL_EXPORT_SYMBOL(iwl_force_nmi);
+
+static const char *get_fh_string(int cmd)
+{
+#define IWL_CMD(x) case x: return #x
+	switch (cmd) {
+	IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
+	IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
+	IWL_CMD(FH_RSCSR_CHNL0_WPTR);
+	IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
+	IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
+	IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
+	IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
+	IWL_CMD(FH_TSSR_TX_STATUS_REG);
+	IWL_CMD(FH_TSSR_TX_ERROR_REG);
+	default:
+		return "UNKNOWN";
+	}
+#undef IWL_CMD
+}
+
+int iwl_dump_fh(struct iwl_trans *trans, char **buf)
+{
+	int i;
+	static const u32 fh_tbl[] = {
+		FH_RSCSR_CHNL0_STTS_WPTR_REG,
+		FH_RSCSR_CHNL0_RBDCB_BASE_REG,
+		FH_RSCSR_CHNL0_WPTR,
+		FH_MEM_RCSR_CHNL0_CONFIG_REG,
+		FH_MEM_RSSR_SHARED_CTRL_REG,
+		FH_MEM_RSSR_RX_STATUS_REG,
+		FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
+		FH_TSSR_TX_STATUS_REG,
+		FH_TSSR_TX_ERROR_REG
+	};
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (buf) {
+		int pos = 0;
+		size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
+
+		*buf = kmalloc(bufsz, GFP_KERNEL);
+		if (!*buf)
+			return -ENOMEM;
+
+		pos += scnprintf(*buf + pos, bufsz - pos,
+				"FH register values:\n");
+
+		for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
+			pos += scnprintf(*buf + pos, bufsz - pos,
+				"  %34s: 0X%08x\n",
+				get_fh_string(fh_tbl[i]),
+				iwl_read_direct32(trans, fh_tbl[i]));
+
+		return pos;
+	}
+#endif
+
+	IWL_ERR(trans, "FH register values:\n");
+	for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++)
+		IWL_ERR(trans, "  %34s: 0X%08x\n",
+			get_fh_string(fh_tbl[i]),
+			iwl_read_direct32(trans, fh_tbl[i]));
+
+	return 0;
+}