drivers/net/wireless/zd1211rw/zd_rf.c

   1 /* ZD1211 USB-WLAN driver for Linux
   2  *
   3  * Copyright (C) 2005-2007 Ulrich Kunitz <kune@deine-taler.de>
   4  * Copyright (C) 2006-2007 Daniel Drake <dsd@gentoo.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  */
  20
  21 #include <linux/errno.h>
  22 #include <linux/string.h>
  23
  24 #include "zd_def.h"
  25 #include "zd_rf.h"
  26 #include "zd_mac.h"
  27 #include "zd_chip.h"
  28
  29 static const char * const rfs[] = {
  30         [0]             = "unknown RF0",
  31         [1]             = "unknown RF1",
  32         [UW2451_RF]     = "UW2451_RF",
  33         [UCHIP_RF]      = "UCHIP_RF",
  34         [AL2230_RF]     = "AL2230_RF",
  35         [AL7230B_RF]    = "AL7230B_RF",
  36         [THETA_RF]      = "THETA_RF",
  37         [AL2210_RF]     = "AL2210_RF",
  38         [MAXIM_NEW_RF]  = "MAXIM_NEW_RF",
  39         [UW2453_RF]     = "UW2453_RF",
  40         [AL2230S_RF]    = "AL2230S_RF",
  41         [RALINK_RF]     = "RALINK_RF",
  42         [INTERSIL_RF]   = "INTERSIL_RF",
  43         [RF2959_RF]     = "RF2959_RF",
  44         [MAXIM_NEW2_RF] = "MAXIM_NEW2_RF",
  45         [PHILIPS_RF]    = "PHILIPS_RF",
  46 };
  47
  48 const char *zd_rf_name(u8 type)
  49 {
  50         if (type & 0xf0)
  51                 type = 0;
  52         return rfs[type];
  53 }
  54
  55 void zd_rf_init(struct zd_rf *rf)
  56 {
  57         memset(rf, 0, sizeof(*rf));
  58
  59         /* default to update channel integration, as almost all RF's do want
  60          * this */
  61         rf->update_channel_int = 1;
  62 }
  63
  64 void zd_rf_clear(struct zd_rf *rf)
  65 {
  66         if (rf->clear)
  67                 rf->clear(rf);
  68         ZD_MEMCLEAR(rf, sizeof(*rf));
  69 }
  70
  71 int zd_rf_init_hw(struct zd_rf *rf, u8 type)
  72 {
  73         int r = 0;
  74         int t;
  75         struct zd_chip *chip = zd_rf_to_chip(rf);
  76
  77         ZD_ASSERT(mutex_is_locked(&chip->mutex));
  78         switch (type) {
  79         case RF2959_RF:
  80                 r = zd_rf_init_rf2959(rf);
  81                 break;
  82         case AL2230_RF:
  83         case AL2230S_RF:
  84                 r = zd_rf_init_al2230(rf);
  85                 break;
  86         case AL7230B_RF:
  87                 r = zd_rf_init_al7230b(rf);
  88                 break;
  89         case MAXIM_NEW_RF:
  90         case UW2453_RF:
  91                 r = zd_rf_init_uw2453(rf);
  92                 break;
  93         default:
  94                 dev_err(zd_chip_dev(chip),
  95                         "RF %s %#x is not supported\n", zd_rf_name(type), type);
  96                 rf->type = 0;
  97                 return -ENODEV;
  98         }
  99
 100         if (r)
 101                 return r;
 102
 103         rf->type = type;
 104
 105         r = zd_chip_lock_phy_regs(chip);
 106         if (r)
 107                 return r;
 108         t = rf->init_hw(rf);
 109         r = zd_chip_unlock_phy_regs(chip);
 110         if (t)
 111                 r = t;
 112         return r;
 113 }
 114
 115 int zd_rf_scnprint_id(struct zd_rf *rf, char *buffer, size_t size)
 116 {
 117         return scnprintf(buffer, size, "%s", zd_rf_name(rf->type));
 118 }
 119
 120 int zd_rf_set_channel(struct zd_rf *rf, u8 channel)
 121 {
 122         int r;
 123
 124         ZD_ASSERT(mutex_is_locked(&zd_rf_to_chip(rf)->mutex));
 125         if (channel < MIN_CHANNEL24)
 126                 return -EINVAL;
 127         if (channel > MAX_CHANNEL24)
 128                 return -EINVAL;
 129         dev_dbg_f(zd_chip_dev(zd_rf_to_chip(rf)), "channel: %d\n", channel);
 130
 131         r = rf->set_channel(rf, channel);
 132         if (r >= 0)
 133                 rf->channel = channel;
 134         return r;
 135 }
 136
 137 int zd_switch_radio_on(struct zd_rf *rf)
 138 {
 139         int r, t;
 140         struct zd_chip *chip = zd_rf_to_chip(rf);
 141
 142         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 143         r = zd_chip_lock_phy_regs(chip);
 144         if (r)
 145                 return r;
 146         t = rf->switch_radio_on(rf);
 147         r = zd_chip_unlock_phy_regs(chip);
 148         if (t)
 149                 r = t;
 150         return r;
 151 }
 152
 153 int zd_switch_radio_off(struct zd_rf *rf)
 154 {
 155         int r, t;
 156         struct zd_chip *chip = zd_rf_to_chip(rf);
 157
 158         /* TODO: move phy regs handling to zd_chip */
 159         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 160         r = zd_chip_lock_phy_regs(chip);
 161         if (r)
 162                 return r;
 163         t = rf->switch_radio_off(rf);
 164         r = zd_chip_unlock_phy_regs(chip);
 165         if (t)
 166                 r = t;
 167         return r;
 168 }
 169
 170 int zd_rf_patch_6m_band_edge(struct zd_rf *rf, u8 channel)
 171 {
 172         if (!rf->patch_6m_band_edge)
 173                 return 0;
 174
 175         return rf->patch_6m_band_edge(rf, channel);
 176 }
 177
 178 int zd_rf_generic_patch_6m(struct zd_rf *rf, u8 channel)
 179 {
 180         return zd_chip_generic_patch_6m_band(zd_rf_to_chip(rf), channel);
 181 }
 182