1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project.
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of version 2 of the GNU General Public License as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
19 *
20 * The full GNU General Public License is included in this distribution in the
21 * file called LICENSE.
22 *
23 * Contact Information:
24 * Intel Linux Wireless <ilw@linux.intel.com>
25 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
26 *
27 *****************************************************************************/
28 #include <linux/delay.h>
29 #include <linux/device.h>
30 #include <linux/export.h>
31
32 #include "iwl-drv.h"
33 #include "iwl-io.h"
34 #include "iwl-csr.h"
35 #include "iwl-debug.h"
36 #include "iwl-prph.h"
37 #include "iwl-fh.h"
38
39 #define IWL_POLL_INTERVAL 10 /* microseconds */
40
iwl_poll_bit(struct iwl_trans * trans,u32 addr,u32 bits,u32 mask,int timeout)41 int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
42 u32 bits, u32 mask, int timeout)
43 {
44 int t = 0;
45
46 do {
47 if ((iwl_read32(trans, addr) & mask) == (bits & mask))
48 return t;
49 udelay(IWL_POLL_INTERVAL);
50 t += IWL_POLL_INTERVAL;
51 } while (t < timeout);
52
53 return -ETIMEDOUT;
54 }
55 IWL_EXPORT_SYMBOL(iwl_poll_bit);
56
iwl_read_direct32(struct iwl_trans * trans,u32 reg)57 u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
58 {
59 u32 value = 0x5a5a5a5a;
60 unsigned long flags;
61 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
62 value = iwl_read32(trans, reg);
63 iwl_trans_release_nic_access(trans, &flags);
64 }
65
66 return value;
67 }
68 IWL_EXPORT_SYMBOL(iwl_read_direct32);
69
iwl_write_direct32(struct iwl_trans * trans,u32 reg,u32 value)70 void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
71 {
72 unsigned long flags;
73
74 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
75 iwl_write32(trans, reg, value);
76 iwl_trans_release_nic_access(trans, &flags);
77 }
78 }
79 IWL_EXPORT_SYMBOL(iwl_write_direct32);
80
iwl_poll_direct_bit(struct iwl_trans * trans,u32 addr,u32 mask,int timeout)81 int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
82 int timeout)
83 {
84 int t = 0;
85
86 do {
87 if ((iwl_read_direct32(trans, addr) & mask) == mask)
88 return t;
89 udelay(IWL_POLL_INTERVAL);
90 t += IWL_POLL_INTERVAL;
91 } while (t < timeout);
92
93 return -ETIMEDOUT;
94 }
95 IWL_EXPORT_SYMBOL(iwl_poll_direct_bit);
96
__iwl_read_prph(struct iwl_trans * trans,u32 ofs)97 u32 __iwl_read_prph(struct iwl_trans *trans, u32 ofs)
98 {
99 u32 val = iwl_trans_read_prph(trans, ofs);
100 trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
101 return val;
102 }
103
__iwl_write_prph(struct iwl_trans * trans,u32 ofs,u32 val)104 void __iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
105 {
106 trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
107 iwl_trans_write_prph(trans, ofs, val);
108 }
109
iwl_read_prph(struct iwl_trans * trans,u32 ofs)110 u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
111 {
112 unsigned long flags;
113 u32 val = 0x5a5a5a5a;
114
115 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
116 val = __iwl_read_prph(trans, ofs);
117 iwl_trans_release_nic_access(trans, &flags);
118 }
119 return val;
120 }
121 IWL_EXPORT_SYMBOL(iwl_read_prph);
122
iwl_write_prph(struct iwl_trans * trans,u32 ofs,u32 val)123 void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
124 {
125 unsigned long flags;
126
127 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
128 __iwl_write_prph(trans, ofs, val);
129 iwl_trans_release_nic_access(trans, &flags);
130 }
131 }
132 IWL_EXPORT_SYMBOL(iwl_write_prph);
133
iwl_poll_prph_bit(struct iwl_trans * trans,u32 addr,u32 bits,u32 mask,int timeout)134 int iwl_poll_prph_bit(struct iwl_trans *trans, u32 addr,
135 u32 bits, u32 mask, int timeout)
136 {
137 int t = 0;
138
139 do {
140 if ((iwl_read_prph(trans, addr) & mask) == (bits & mask))
141 return t;
142 udelay(IWL_POLL_INTERVAL);
143 t += IWL_POLL_INTERVAL;
144 } while (t < timeout);
145
146 return -ETIMEDOUT;
147 }
148
iwl_set_bits_prph(struct iwl_trans * trans,u32 ofs,u32 mask)149 void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
150 {
151 unsigned long flags;
152
153 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
154 __iwl_write_prph(trans, ofs,
155 __iwl_read_prph(trans, ofs) | mask);
156 iwl_trans_release_nic_access(trans, &flags);
157 }
158 }
159 IWL_EXPORT_SYMBOL(iwl_set_bits_prph);
160
iwl_set_bits_mask_prph(struct iwl_trans * trans,u32 ofs,u32 bits,u32 mask)161 void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
162 u32 bits, u32 mask)
163 {
164 unsigned long flags;
165
166 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
167 __iwl_write_prph(trans, ofs,
168 (__iwl_read_prph(trans, ofs) & mask) | bits);
169 iwl_trans_release_nic_access(trans, &flags);
170 }
171 }
172 IWL_EXPORT_SYMBOL(iwl_set_bits_mask_prph);
173
iwl_clear_bits_prph(struct iwl_trans * trans,u32 ofs,u32 mask)174 void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
175 {
176 unsigned long flags;
177 u32 val;
178
179 if (iwl_trans_grab_nic_access(trans, false, &flags)) {
180 val = __iwl_read_prph(trans, ofs);
181 __iwl_write_prph(trans, ofs, (val & ~mask));
182 iwl_trans_release_nic_access(trans, &flags);
183 }
184 }
185 IWL_EXPORT_SYMBOL(iwl_clear_bits_prph);
186
iwl_force_nmi(struct iwl_trans * trans)187 void iwl_force_nmi(struct iwl_trans *trans)
188 {
189 /*
190 * In HW previous to the 8000 HW family, and in the 8000 HW family
191 * itself when the revision step==0, the DEVICE_SET_NMI_REG is used
192 * to force an NMI. Otherwise, a different register -
193 * DEVICE_SET_NMI_8000B_REG - is used.
194 */
195 if ((trans->cfg->device_family != IWL_DEVICE_FAMILY_8000) ||
196 (CSR_HW_REV_STEP(trans->hw_rev) == SILICON_A_STEP))
197 iwl_write_prph(trans, DEVICE_SET_NMI_REG, DEVICE_SET_NMI_VAL);
198 else
199 iwl_write_prph(trans, DEVICE_SET_NMI_8000B_REG,
200 DEVICE_SET_NMI_8000B_VAL);
201 }
202 IWL_EXPORT_SYMBOL(iwl_force_nmi);
203
get_fh_string(int cmd)204 static const char *get_fh_string(int cmd)
205 {
206 #define IWL_CMD(x) case x: return #x
207 switch (cmd) {
208 IWL_CMD(FH_RSCSR_CHNL0_STTS_WPTR_REG);
209 IWL_CMD(FH_RSCSR_CHNL0_RBDCB_BASE_REG);
210 IWL_CMD(FH_RSCSR_CHNL0_WPTR);
211 IWL_CMD(FH_MEM_RCSR_CHNL0_CONFIG_REG);
212 IWL_CMD(FH_MEM_RSSR_SHARED_CTRL_REG);
213 IWL_CMD(FH_MEM_RSSR_RX_STATUS_REG);
214 IWL_CMD(FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV);
215 IWL_CMD(FH_TSSR_TX_STATUS_REG);
216 IWL_CMD(FH_TSSR_TX_ERROR_REG);
217 default:
218 return "UNKNOWN";
219 }
220 #undef IWL_CMD
221 }
222
iwl_dump_fh(struct iwl_trans * trans,char ** buf)223 int iwl_dump_fh(struct iwl_trans *trans, char **buf)
224 {
225 int i;
226 static const u32 fh_tbl[] = {
227 FH_RSCSR_CHNL0_STTS_WPTR_REG,
228 FH_RSCSR_CHNL0_RBDCB_BASE_REG,
229 FH_RSCSR_CHNL0_WPTR,
230 FH_MEM_RCSR_CHNL0_CONFIG_REG,
231 FH_MEM_RSSR_SHARED_CTRL_REG,
232 FH_MEM_RSSR_RX_STATUS_REG,
233 FH_MEM_RSSR_RX_ENABLE_ERR_IRQ2DRV,
234 FH_TSSR_TX_STATUS_REG,
235 FH_TSSR_TX_ERROR_REG
236 };
237
238 #ifdef CONFIG_IWLWIFI_DEBUGFS
239 if (buf) {
240 int pos = 0;
241 size_t bufsz = ARRAY_SIZE(fh_tbl) * 48 + 40;
242
243 *buf = kmalloc(bufsz, GFP_KERNEL);
244 if (!*buf)
245 return -ENOMEM;
246
247 pos += scnprintf(*buf + pos, bufsz - pos,
248 "FH register values:\n");
249
250 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
251 pos += scnprintf(*buf + pos, bufsz - pos,
252 " %34s: 0X%08x\n",
253 get_fh_string(fh_tbl[i]),
254 iwl_read_direct32(trans, fh_tbl[i]));
255
256 return pos;
257 }
258 #endif
259
260 IWL_ERR(trans, "FH register values:\n");
261 for (i = 0; i < ARRAY_SIZE(fh_tbl); i++)
262 IWL_ERR(trans, " %34s: 0X%08x\n",
263 get_fh_string(fh_tbl[i]),
264 iwl_read_direct32(trans, fh_tbl[i]));
265
266 return 0;
267 }
268