1/******************************************************************************
  2 *
  3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
  4 * Copyright(c) 2015 Intel Deutschland GmbH
  5 *
  6 * Portions of this file are derived from the ipw3945 project.
  7 *
  8 * This program is free software; you can redistribute it and/or modify it
  9 * under the terms of version 2 of the GNU General Public License as
 10 * published by the Free Software Foundation.
 11 *
 12 * This program is distributed in the hope that it will be useful, but WITHOUT
 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 14 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 15 * more details.
 16 *
 17 * You should have received a copy of the GNU General Public License along with
 18 * this program; if not, write to the Free Software Foundation, Inc.,
 19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 20 *
 21 * The full GNU General Public License is included in this distribution in the
 22 * file called LICENSE.
 23 *
 24 * Contact Information:
 25 *  Intel Linux Wireless <linuxwifi@intel.com>
 26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 27 *
 28 *****************************************************************************/
 29#include <linux/delay.h>
 30#include <linux/device.h>
 31#include <linux/export.h>
 32
 33#include "iwl-drv.h"
 34#include "iwl-io.h"
 35#include "iwl-csr.h"
 36#include "iwl-debug.h"
 37#include "iwl-prph.h"
 38#include "iwl-fh.h"
 39
 40void iwl_write8(struct iwl_trans *trans, u32 ofs, u8 val)
 41{
 42	trace_iwlwifi_dev_iowrite8(trans->dev, ofs, val);
 43	iwl_trans_write8(trans, ofs, val);
 44}
 45IWL_EXPORT_SYMBOL(iwl_write8);
 46
 47void iwl_write32(struct iwl_trans *trans, u32 ofs, u32 val)
 48{
 49	trace_iwlwifi_dev_iowrite32(trans->dev, ofs, val);
 50	iwl_trans_write32(trans, ofs, val);
 51}
 52IWL_EXPORT_SYMBOL(iwl_write32);
 53
 54u32 iwl_read32(struct iwl_trans *trans, u32 ofs)
 55{
 56	u32 val = iwl_trans_read32(trans, ofs);
 57
 58	trace_iwlwifi_dev_ioread32(trans->dev, ofs, val);
 59	return val;
 60}
 61IWL_EXPORT_SYMBOL(iwl_read32);
 62
 63#define IWL_POLL_INTERVAL 10	/* microseconds */
 64
 65int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
 66		 u32 bits, u32 mask, int timeout)
 67{
 68	int t = 0;
 69
 70	do {
 71		if ((iwl_read32(trans, addr) & mask) == (bits & mask))
 72			return t;
 73		udelay(IWL_POLL_INTERVAL);
 74		t += IWL_POLL_INTERVAL;
 75	} while (t < timeout);
 76
 77	return -ETIMEDOUT;
 78}
 79IWL_EXPORT_SYMBOL(iwl_poll_bit);
 80
 81u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
 82{
 83	u32 value = 0x5a5a5a5a;
 84	unsigned long flags;
 85	if (iwl_trans_grab_nic_access(trans, &flags)) {
 86		value = iwl_read32(trans, reg);
 87		iwl_trans_release_nic_access(trans, &flags);
 88	}
 89
 90	return value;
 91}
 92IWL_EXPORT_SYMBOL(iwl_read_direct32);
 93
 94void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
 95{
 96	unsigned long flags;
 97
 98	if (iwl_trans_grab_nic_access(trans, &flags)) {
 99		iwl_write32(trans, reg, value);
100		iwl_trans_release_nic_access(trans, &flags);
101	}
102}
103IWL_EXPORT_SYMBOL(iwl_write_direct32);
104
105int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
106			int timeout)
107{
108	int t = 0;
109
110	do {
111		if ((iwl_read_direct32(trans, addr) & mask) == mask)
112			return t;
113		udelay(IWL_POLL_INTERVAL);
114		t += IWL_POLL_INTERVAL;
115	} while (t < timeout);
116
117	return -ETIMEDOUT;
118}
119IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
120
121u32 iwl_read_prph_no_grab(struct iwl_trans *trans, u32 ofs)
122{
123	u32 val = iwl_trans_read_prph(trans, ofs);
124	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
125	return val;
126}
127IWL_EXPORT_SYMBOL(iwl_read_prph_no_grab);
128
129void iwl_write_prph_no_grab(struct iwl_trans *trans, u32 ofs, u32 val)
130{
131	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
132	iwl_trans_write_prph(trans, ofs, val);
133}
134IWL_EXPORT_SYMBOL(iwl_write_prph_no_grab);
135
136u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
137{
138	unsigned long flags;
139	u32 val = 0x5a5a5a5a;
140
141	if (iwl_trans_grab_nic_access(trans, &flags)) {
142		val = iwl_read_prph_no_grab(trans, ofs);
143		iwl_trans_release_nic_access(trans, &flags);
144	}
145	return val;
146}
147IWL_EXPORT_SYMBOL(iwl_read_prph);
148
149void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
150{
151	unsigned long flags;
152
153	if (iwl_trans_grab_nic_access(trans, &flags)) {
154		iwl_write_prph_no_grab(trans, ofs, val);
155		iwl_trans_release_nic_access(trans, &flags);
156	}
157}
158IWL_EXPORT_SYMBOL(iwl_write_prph);
159
160int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
161		      u32 bits, u32 mask, int timeout)
162{
163	int t = 0;
164
165	do {
166		if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
167			return t;
168		udelay(IWL_POLL_INTERVAL);
169		t += IWL_POLL_INTERVAL;
170	} while (t < timeout);
171
172	return -ETIMEDOUT;
173}
174
175void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
176{
177	unsigned long flags;
178
179	if (iwl_trans_grab_nic_access(trans, &flags)) {
180		iwl_write_prph_no_grab(trans, ofs,
181				       iwl_read_prph_no_grab(trans, ofs) |
182				       mask);
183		iwl_trans_release_nic_access(trans, &flags);
184	}
185}
186IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
187
188void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
189			    u32 bits, u32 mask)
190{
191	unsigned long flags;
192
193	if (iwl_trans_grab_nic_access(trans, &flags)) {
194		iwl_write_prph_no_grab(trans, ofs,
195				       (iwl_read_prph_no_grab(trans, ofs) &
196					mask) | bits);
197		iwl_trans_release_nic_access(trans, &flags);
198	}
199}
200IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
201
202void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
203{
204	unsigned long flags;
205	u32 val;
206
207	if (iwl_trans_grab_nic_access(trans, &flags)) {
208		val = iwl_read_prph_no_grab(trans, ofs);
209		iwl_write_prph_no_grab(trans, ofs, (val & ~mask));
210		iwl_trans_release_nic_access(trans, &flags);
211	}
212}
213IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
214
215void iwl_force_nmi(struct iwl_trans *trans)
216{
217	if (trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) {
218		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
219			       DEVICE_SET_NMI_VAL_DRV);
220		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
221			       DEVICE_SET_NMI_VAL_HW);
222	} else {
223		iwl_write_prph(trans, DEVICE_SET_NMI_8000_REG,
224			       DEVICE_SET_NMI_8000_VAL);
225		iwl_write_prph(trans, DEVICE_SET_NMI_REG,
226			       DEVICE_SET_NMI_VAL_DRV);
227	}
228}
229IWL_EXPORT_SYMBOL(iwl_force_nmi);
230
231static const char *get_fh_string(int cmd)
232{
233#define IWL_CMD(x) case x: return #x
234	switch (cmd) {
235	IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
236	IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
237	IWL_CMD(FH_RSCSR_CHNL0_WPTR);
238	IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
239	IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
240	IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
241	IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
242	IWL_CMD(FH_TSSR_TX_STATUS_REG);
243	IWL_CMD(FH_TSSR_TX_ERROR_REG);
244	default:
245		return "UNKNOWN";
246	}
247#undef IWL_CMD
248}
249
250int iwl_dump_fh(struct iwl_trans *trans, char **buf)
251{
252	int i;
253	static const u32 fh_tbl[] = {
254		FH_RSCSR_CHNL0_STTS_WPTR_REG,
255		FH_RSCSR_CHNL0_RBDCB_BASE_REG,
256		FH_RSCSR_CHNL0_WPTR,
257		FH_MEM_RCSR_CHNL0_CONFIG_REG,
258		FH_MEM_RSSR_SHARED_CTRL_REG,
259		FH_MEM_RSSR_RX_STATUS_REG,
260		FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
261		FH_TSSR_TX_STATUS_REG,
262		FH_TSSR_TX_ERROR_REG
263	};
264
265#ifdef CONFIG_IWLWIFI_DEBUGFS
266	if (buf) {
267		int pos = 0;
268		size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
269
270		*buf = kmalloc(bufsz, GFP_KERNEL);
271		if (!*buf)
272			return -ENOMEM;
273
274		pos += scnprintf(*buf + pos, bufsz - pos,
275				"FH register values:\n");
276
277		for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
278			pos += scnprintf(*buf + pos, bufsz - pos,
279				"  %34s: 0X%08x\n",
280				get_fh_string(fh_tbl[i]),
281				iwl_read_direct32(trans, fh_tbl[i]));
282
283		return pos;
284	}
285#endif
286
287	IWL_ERR(trans, "FH register values:\n");
288	for (i = 0; i <  ARRAY_SIZE(fh_tbl); i++)
289		IWL_ERR(trans, "  %34s: 0X%08x\n",
290			get_fh_string(fh_tbl[i]),
291			iwl_read_direct32(trans, fh_tbl[i]));
292
293	return 0;
294}