drivers/net/wireless/iwlwifi/iwl-3945-io.h

   1 /******************************************************************************
   2  *
   3  * Copyright(c) 2003 - 2008 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  * James P. Ketrenos <ipw2100-admin@linux.intel.com>
  25  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26  *
  27  *****************************************************************************/
  28
  29 #ifndef __iwl3945_io_h__
  30 #define __iwl3945_io_h__
  31
  32 #include <linux/io.h>
  33
  34 #include "iwl-3945-debug.h"
  35
  36 /*
  37  * IO, register, and NIC memory access functions
  38  *
  39  * NOTE on naming convention and macro usage for these
  40  *
  41  * A single _ prefix before a an access function means that no state
  42  * check or debug information is printed when that function is called.
  43  *
  44  * A double __ prefix before an access function means that state is checked
  45  * and the current line number is printed in addition to any other debug output.
  46  *
  47  * The non-prefixed name is the #define that maps the caller into a
  48  * #define that provides the caller's __LINE__ to the double prefix version.
  49  *
  50  * If you wish to call the function without any debug or state checking,
  51  * you should use the single _ prefix version (as is used by dependent IO
  52  * routines, for example _iwl3945_read_direct32 calls the non-check version of
  53  * _iwl3945_read32.)
  54  *
  55  * These declarations are *extremely* useful in quickly isolating code deltas
  56  * which result in misconfiguration of the hardware I/O.  In combination with
  57  * git-bisect and the IO debug level you can quickly determine the specific
  58  * commit which breaks the IO sequence to the hardware.
  59  *
  60  */
  61
  62 #define _iwl3945_write32(priv, ofs, val) iowrite32((val), (priv)->hw_base + (ofs))
  63 #ifdef CONFIG_IWL3945_DEBUG
  64 static inline void __iwl3945_write32(const char *f, u32 l, struct iwl3945_priv *priv,
  65                                  u32 ofs, u32 val)
  66 {
  67         IWL_DEBUG_IO("write32(0x%08X, 0x%08X) - %s %d\n", ofs, val, f, l);
  68         _iwl3945_write32(priv, ofs, val);
  69 }
  70 #define iwl3945_write32(priv, ofs, val) \
  71         __iwl3945_write32(__FILE__, __LINE__, priv, ofs, val)
  72 #else
  73 #define iwl3945_write32(priv, ofs, val) _iwl3945_write32(priv, ofs, val)
  74 #endif
  75
  76 #define _iwl3945_read32(priv, ofs) ioread32((priv)->hw_base + (ofs))
  77 #ifdef CONFIG_IWL3945_DEBUG
  78 static inline u32 __iwl3945_read32(char *f, u32 l, struct iwl3945_priv *priv, u32 ofs)
  79 {
  80         IWL_DEBUG_IO("read_direct32(0x%08X) - %s %d\n", ofs, f, l);
  81         return _iwl3945_read32(priv, ofs);
  82 }
  83 #define iwl3945_read32(priv, ofs)__iwl3945_read32(__FILE__, __LINE__, priv, ofs)
  84 #else
  85 #define iwl3945_read32(p, o) _iwl3945_read32(p, o)
  86 #endif
  87
  88 static inline int _iwl3945_poll_bit(struct iwl3945_priv *priv, u32 addr,
  89                                 u32 bits, u32 mask, int timeout)
  90 {
  91         int i = 0;
  92
  93         do {
  94                 if ((_iwl3945_read32(priv, addr) & mask) == (bits & mask))
  95                         return i;
  96                 udelay(10);
  97                 i += 10;
  98         } while (i < timeout);
  99
 100         return -ETIMEDOUT;
 101 }
 102 #ifdef CONFIG_IWL3945_DEBUG
 103 static inline int __iwl3945_poll_bit(const char *f, u32 l,
 104                                  struct iwl3945_priv *priv, u32 addr,
 105                                  u32 bits, u32 mask, int timeout)
 106 {
 107         int ret = _iwl3945_poll_bit(priv, addr, bits, mask, timeout);
 108         IWL_DEBUG_IO("poll_bit(0x%08X, 0x%08X, 0x%08X) - %s- %s %d\n",
 109                       addr, bits, mask,
 110                       unlikely(ret  == -ETIMEDOUT) ? "timeout" : "", f, l);
 111         return ret;
 112 }
 113 #define iwl3945_poll_bit(priv, addr, bits, mask, timeout) \
 114         __iwl3945_poll_bit(__FILE__, __LINE__, priv, addr, bits, mask, timeout)
 115 #else
 116 #define iwl3945_poll_bit(p, a, b, m, t) _iwl3945_poll_bit(p, a, b, m, t)
 117 #endif
 118
 119 static inline void _iwl3945_set_bit(struct iwl3945_priv *priv, u32 reg, u32 mask)
 120 {
 121         _iwl3945_write32(priv, reg, _iwl3945_read32(priv, reg) | mask);
 122 }
 123 #ifdef CONFIG_IWL3945_DEBUG
 124 static inline void __iwl3945_set_bit(const char *f, u32 l,
 125                                  struct iwl3945_priv *priv, u32 reg, u32 mask)
 126 {
 127         u32 val = _iwl3945_read32(priv, reg) | mask;
 128         IWL_DEBUG_IO("set_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 129         _iwl3945_write32(priv, reg, val);
 130 }
 131 #define iwl3945_set_bit(p, r, m) __iwl3945_set_bit(__FILE__, __LINE__, p, r, m)
 132 #else
 133 #define iwl3945_set_bit(p, r, m) _iwl3945_set_bit(p, r, m)
 134 #endif
 135
 136 static inline void _iwl3945_clear_bit(struct iwl3945_priv *priv, u32 reg, u32 mask)
 137 {
 138         _iwl3945_write32(priv, reg, _iwl3945_read32(priv, reg) & ~mask);
 139 }
 140 #ifdef CONFIG_IWL3945_DEBUG
 141 static inline void __iwl3945_clear_bit(const char *f, u32 l,
 142                                    struct iwl3945_priv *priv, u32 reg, u32 mask)
 143 {
 144         u32 val = _iwl3945_read32(priv, reg) & ~mask;
 145         IWL_DEBUG_IO("clear_bit(0x%08X, 0x%08X) = 0x%08X\n", reg, mask, val);
 146         _iwl3945_write32(priv, reg, val);
 147 }
 148 #define iwl3945_clear_bit(p, r, m) __iwl3945_clear_bit(__FILE__, __LINE__, p, r, m)
 149 #else
 150 #define iwl3945_clear_bit(p, r, m) _iwl3945_clear_bit(p, r, m)
 151 #endif
 152
 153 static inline int _iwl3945_grab_nic_access(struct iwl3945_priv *priv)
 154 {
 155         int ret;
 156 #ifdef CONFIG_IWL3945_DEBUG
 157         if (atomic_read(&priv->restrict_refcnt))
 158                 return 0;
 159 #endif
 160         /* this bit wakes up the NIC */
 161         _iwl3945_set_bit(priv, CSR_GP_CNTRL, CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
 162         ret = _iwl3945_poll_bit(priv, CSR_GP_CNTRL,
 163                            CSR_GP_CNTRL_REG_VAL_MAC_ACCESS_EN,
 164                            (CSR_GP_CNTRL_REG_FLAG_MAC_CLOCK_READY |
 165                             CSR_GP_CNTRL_REG_FLAG_GOING_TO_SLEEP), 50);
 166         if (ret < 0) {
 167                 IWL_ERROR("MAC is in deep sleep!\n");
 168                 return -EIO;
 169         }
 170
 171 #ifdef CONFIG_IWL3945_DEBUG
 172         atomic_inc(&priv->restrict_refcnt);
 173 #endif
 174         return 0;
 175 }
 176
 177 #ifdef CONFIG_IWL3945_DEBUG
 178 static inline int __iwl3945_grab_nic_access(const char *f, u32 l,
 179                                                struct iwl3945_priv *priv)
 180 {
 181         if (atomic_read(&priv->restrict_refcnt))
 182                 IWL_DEBUG_INFO("Grabbing access while already held at "
 183                                "line %d.\n", l);
 184
 185         IWL_DEBUG_IO("grabbing nic access - %s %d\n", f, l);
 186         return _iwl3945_grab_nic_access(priv);
 187 }
 188 #define iwl3945_grab_nic_access(priv) \
 189         __iwl3945_grab_nic_access(__FILE__, __LINE__, priv)
 190 #else
 191 #define iwl3945_grab_nic_access(priv) \
 192         _iwl3945_grab_nic_access(priv)
 193 #endif
 194
 195 static inline void _iwl3945_release_nic_access(struct iwl3945_priv *priv)
 196 {
 197 #ifdef CONFIG_IWL3945_DEBUG
 198         if (atomic_dec_and_test(&priv->restrict_refcnt))
 199 #endif
 200                 _iwl3945_clear_bit(priv, CSR_GP_CNTRL,
 201                                CSR_GP_CNTRL_REG_FLAG_MAC_ACCESS_REQ);
 202 }
 203 #ifdef CONFIG_IWL3945_DEBUG
 204 static inline void __iwl3945_release_nic_access(const char *f, u32 l,
 205                                             struct iwl3945_priv *priv)
 206 {
 207         if (atomic_read(&priv->restrict_refcnt) <= 0)
 208                 IWL_ERROR("Release unheld nic access at line %d.\n", l);
 209
 210         IWL_DEBUG_IO("releasing nic access - %s %d\n", f, l);
 211         _iwl3945_release_nic_access(priv);
 212 }
 213 #define iwl3945_release_nic_access(priv) \
 214         __iwl3945_release_nic_access(__FILE__, __LINE__, priv)
 215 #else
 216 #define iwl3945_release_nic_access(priv) \
 217         _iwl3945_release_nic_access(priv)
 218 #endif
 219
 220 static inline u32 _iwl3945_read_direct32(struct iwl3945_priv *priv, u32 reg)
 221 {
 222         return _iwl3945_read32(priv, reg);
 223 }
 224 #ifdef CONFIG_IWL3945_DEBUG
 225 static inline u32 __iwl3945_read_direct32(const char *f, u32 l,
 226                                         struct iwl3945_priv *priv, u32 reg)
 227 {
 228         u32 value = _iwl3945_read_direct32(priv, reg);
 229         if (!atomic_read(&priv->restrict_refcnt))
 230                 IWL_ERROR("Nic access not held from %s %d\n", f, l);
 231         IWL_DEBUG_IO("read_direct32(0x%4X) = 0x%08x - %s %d \n", reg, value,
 232                      f, l);
 233         return value;
 234 }
 235 #define iwl3945_read_direct32(priv, reg) \
 236         __iwl3945_read_direct32(__FILE__, __LINE__, priv, reg)
 237 #else
 238 #define iwl3945_read_direct32 _iwl3945_read_direct32
 239 #endif
 240
 241 static inline void _iwl3945_write_direct32(struct iwl3945_priv *priv,
 242                                          u32 reg, u32 value)
 243 {
 244         _iwl3945_write32(priv, reg, value);
 245 }
 246 #ifdef CONFIG_IWL3945_DEBUG
 247 static void __iwl3945_write_direct32(u32 line,
 248                                    struct iwl3945_priv *priv, u32 reg, u32 value)
 249 {
 250         if (!atomic_read(&priv->restrict_refcnt))
 251                 IWL_ERROR("Nic access not held from line %d\n", line);
 252         _iwl3945_write_direct32(priv, reg, value);
 253 }
 254 #define iwl3945_write_direct32(priv, reg, value) \
 255         __iwl3945_write_direct32(__LINE__, priv, reg, value)
 256 #else
 257 #define iwl3945_write_direct32 _iwl3945_write_direct32
 258 #endif
 259
 260 static inline void iwl3945_write_reg_buf(struct iwl3945_priv *priv,
 261                                                u32 reg, u32 len, u32 *values)
 262 {
 263         u32 count = sizeof(u32);
 264
 265         if ((priv != NULL) && (values != NULL)) {
 266                 for (; 0 < len; len -= count, reg += count, values++)
 267                         _iwl3945_write_direct32(priv, reg, *values);
 268         }
 269 }
 270
 271 static inline int _iwl3945_poll_direct_bit(struct iwl3945_priv *priv,
 272                                            u32 addr, u32 mask, int timeout)
 273 {
 274         return _iwl3945_poll_bit(priv, addr, mask, mask, timeout);
 275 }
 276
 277 #ifdef CONFIG_IWL3945_DEBUG
 278 static inline int __iwl3945_poll_direct_bit(const char *f, u32 l,
 279                                             struct iwl3945_priv *priv,
 280                                             u32 addr, u32 mask, int timeout)
 281 {
 282         int ret  = _iwl3945_poll_direct_bit(priv, addr, mask, timeout);
 283
 284         if (unlikely(ret == -ETIMEDOUT))
 285                 IWL_DEBUG_IO("poll_direct_bit(0x%08X, 0x%08X) - "
 286                              "timedout - %s %d\n", addr, mask, f, l);
 287         else
 288                 IWL_DEBUG_IO("poll_direct_bit(0x%08X, 0x%08X) = 0x%08X "
 289                              "- %s %d\n", addr, mask, ret, f, l);
 290         return ret;
 291 }
 292 #define iwl3945_poll_direct_bit(priv, addr, mask, timeout) \
 293         __iwl3945_poll_direct_bit(__FILE__, __LINE__, priv, addr, mask, timeout)
 294 #else
 295 #define iwl3945_poll_direct_bit _iwl3945_poll_direct_bit
 296 #endif
 297
 298 static inline u32 _iwl3945_read_prph(struct iwl3945_priv *priv, u32 reg)
 299 {
 300         _iwl3945_write_direct32(priv, HBUS_TARG_PRPH_RADDR, reg | (3 << 24));
 301         rmb();
 302         return _iwl3945_read_direct32(priv, HBUS_TARG_PRPH_RDAT);
 303 }
 304 #ifdef CONFIG_IWL3945_DEBUG
 305 static inline u32 __iwl3945_read_prph(u32 line, struct iwl3945_priv *priv, u32 reg)
 306 {
 307         if (!atomic_read(&priv->restrict_refcnt))
 308                 IWL_ERROR("Nic access not held from line %d\n", line);
 309         return _iwl3945_read_prph(priv, reg);
 310 }
 311
 312 #define iwl3945_read_prph(priv, reg) \
 313         __iwl3945_read_prph(__LINE__, priv, reg)
 314 #else
 315 #define iwl3945_read_prph _iwl3945_read_prph
 316 #endif
 317
 318 static inline void _iwl3945_write_prph(struct iwl3945_priv *priv,
 319                                              u32 addr, u32 val)
 320 {
 321         _iwl3945_write_direct32(priv, HBUS_TARG_PRPH_WADDR,
 322                               ((addr & 0x0000FFFF) | (3 << 24)));
 323         wmb();
 324         _iwl3945_write_direct32(priv, HBUS_TARG_PRPH_WDAT, val);
 325 }
 326 #ifdef CONFIG_IWL3945_DEBUG
 327 static inline void __iwl3945_write_prph(u32 line, struct iwl3945_priv *priv,
 328                                               u32 addr, u32 val)
 329 {
 330         if (!atomic_read(&priv->restrict_refcnt))
 331                 IWL_ERROR("Nic access from line %d\n", line);
 332         _iwl3945_write_prph(priv, addr, val);
 333 }
 334
 335 #define iwl3945_write_prph(priv, addr, val) \
 336         __iwl3945_write_prph(__LINE__, priv, addr, val);
 337 #else
 338 #define iwl3945_write_prph _iwl3945_write_prph
 339 #endif
 340
 341 #define _iwl3945_set_bits_prph(priv, reg, mask) \
 342         _iwl3945_write_prph(priv, reg, (_iwl3945_read_prph(priv, reg) | mask))
 343 #ifdef CONFIG_IWL3945_DEBUG
 344 static inline void __iwl3945_set_bits_prph(u32 line, struct iwl3945_priv *priv,
 345                                         u32 reg, u32 mask)
 346 {
 347         if (!atomic_read(&priv->restrict_refcnt))
 348                 IWL_ERROR("Nic access not held from line %d\n", line);
 349
 350         _iwl3945_set_bits_prph(priv, reg, mask);
 351 }
 352 #define iwl3945_set_bits_prph(priv, reg, mask) \
 353         __iwl3945_set_bits_prph(__LINE__, priv, reg, mask)
 354 #else
 355 #define iwl3945_set_bits_prph _iwl3945_set_bits_prph
 356 #endif
 357
 358 #define _iwl3945_set_bits_mask_prph(priv, reg, bits, mask) \
 359         _iwl3945_write_prph(priv, reg, ((_iwl3945_read_prph(priv, reg) & mask) | bits))
 360
 361 #ifdef CONFIG_IWL3945_DEBUG
 362 static inline void __iwl3945_set_bits_mask_prph(u32 line,
 363                 struct iwl3945_priv *priv, u32 reg, u32 bits, u32 mask)
 364 {
 365         if (!atomic_read(&priv->restrict_refcnt))
 366                 IWL_ERROR("Nic access not held from line %d\n", line);
 367         _iwl3945_set_bits_mask_prph(priv, reg, bits, mask);
 368 }
 369 #define iwl3945_set_bits_mask_prph(priv, reg, bits, mask) \
 370         __iwl3945_set_bits_mask_prph(__LINE__, priv, reg, bits, mask)
 371 #else
 372 #define iwl3945_set_bits_mask_prph _iwl3945_set_bits_mask_prph
 373 #endif
 374
 375 static inline void iwl3945_clear_bits_prph(struct iwl3945_priv
 376                                                  *priv, u32 reg, u32 mask)
 377 {
 378         u32 val = _iwl3945_read_prph(priv, reg);
 379         _iwl3945_write_prph(priv, reg, (val & ~mask));
 380 }
 381
 382 static inline u32 iwl3945_read_targ_mem(struct iwl3945_priv *priv, u32 addr)
 383 {
 384         iwl3945_write_direct32(priv, HBUS_TARG_MEM_RADDR, addr);
 385         rmb();
 386         return iwl3945_read_direct32(priv, HBUS_TARG_MEM_RDAT);
 387 }
 388
 389 static inline void iwl3945_write_targ_mem(struct iwl3945_priv *priv, u32 addr, u32 val)
 390 {
 391         iwl3945_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
 392         wmb();
 393         iwl3945_write_direct32(priv, HBUS_TARG_MEM_WDAT, val);
 394 }
 395
 396 static inline void iwl3945_write_targ_mem_buf(struct iwl3945_priv *priv, u32 addr,
 397                                           u32 len, u32 *values)
 398 {
 399         iwl3945_write_direct32(priv, HBUS_TARG_MEM_WADDR, addr);
 400         wmb();
 401         for (; 0 < len; len -= sizeof(u32), values++)
 402                 iwl3945_write_direct32(priv, HBUS_TARG_MEM_WDAT, *values);
 403 }
 404 #endif