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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/errno.h>
  21 #include <linux/string.h>
  22
  23 #include "zd_def.h"
  24 #include "zd_rf.h"
  25 #include "zd_mac.h"
  26 #include "zd_chip.h"
  27
  28 static const char * const rfs[] = {
  29         [0]             = "unknown RF0",
  30         [1]             = "unknown RF1",
  31         [UW2451_RF]     = "UW2451_RF",
  32         [UCHIP_RF]      = "UCHIP_RF",
  33         [AL2230_RF]     = "AL2230_RF",
  34         [AL7230B_RF]    = "AL7230B_RF",
  35         [THETA_RF]      = "THETA_RF",
  36         [AL2210_RF]     = "AL2210_RF",
  37         [MAXIM_NEW_RF]  = "MAXIM_NEW_RF",
  38         [UW2453_RF]     = "UW2453_RF",
  39         [AL2230S_RF]    = "AL2230S_RF",
  40         [RALINK_RF]     = "RALINK_RF",
  41         [INTERSIL_RF]   = "INTERSIL_RF",
  42         [RF2959_RF]     = "RF2959_RF",
  43         [MAXIM_NEW2_RF] = "MAXIM_NEW2_RF",
  44         [PHILIPS_RF]    = "PHILIPS_RF",
  45 };
  46
  47 const char *zd_rf_name(u8 type)
  48 {
  49         if (type & 0xf0)
  50                 type = 0;
  51         return rfs[type];
  52 }
  53
  54 void zd_rf_init(struct zd_rf *rf)
  55 {
  56         memset(rf, 0, sizeof(*rf));
  57
  58         /* default to update channel integration, as almost all RF's do want
  59          * this */
  60         rf->update_channel_int = 1;
  61 }
  62
  63 void zd_rf_clear(struct zd_rf *rf)
  64 {
  65         if (rf->clear)
  66                 rf->clear(rf);
  67         ZD_MEMCLEAR(rf, sizeof(*rf));
  68 }
  69
  70 int zd_rf_init_hw(struct zd_rf *rf, u8 type)
  71 {
  72         int r = 0;
  73         int t;
  74         struct zd_chip *chip = zd_rf_to_chip(rf);
  75
  76         ZD_ASSERT(mutex_is_locked(&chip->mutex));
  77         switch (type) {
  78         case RF2959_RF:
  79                 r = zd_rf_init_rf2959(rf);
  80                 break;
  81         case AL2230_RF:
  82         case AL2230S_RF:
  83                 r = zd_rf_init_al2230(rf);
  84                 break;
  85         case AL7230B_RF:
  86                 r = zd_rf_init_al7230b(rf);
  87                 break;
  88         case MAXIM_NEW_RF:
  89         case UW2453_RF:
  90                 r = zd_rf_init_uw2453(rf);
  91                 break;
  92         default:
  93                 dev_err(zd_chip_dev(chip),
  94                         "RF %s %#x is not supported\n", zd_rf_name(type), type);
  95                 rf->type = 0;
  96                 return -ENODEV;
  97         }
  98
  99         if (r)
 100                 return r;
 101
 102         rf->type = type;
 103
 104         r = zd_chip_lock_phy_regs(chip);
 105         if (r)
 106                 return r;
 107         t = rf->init_hw(rf);
 108         r = zd_chip_unlock_phy_regs(chip);
 109         if (t)
 110                 r = t;
 111         return r;
 112 }
 113
 114 int zd_rf_scnprint_id(struct zd_rf *rf, char *buffer, size_t size)
 115 {
 116         return scnprintf(buffer, size, "%s", zd_rf_name(rf->type));
 117 }
 118
 119 int zd_rf_set_channel(struct zd_rf *rf, u8 channel)
 120 {
 121         int r;
 122
 123         ZD_ASSERT(mutex_is_locked(&zd_rf_to_chip(rf)->mutex));
 124         if (channel < MIN_CHANNEL24)
 125                 return -EINVAL;
 126         if (channel > MAX_CHANNEL24)
 127                 return -EINVAL;
 128         dev_dbg_f(zd_chip_dev(zd_rf_to_chip(rf)), "channel: %d\n", channel);
 129
 130         r = rf->set_channel(rf, channel);
 131         if (r >= 0)
 132                 rf->channel = channel;
 133         return r;
 134 }
 135
 136 int zd_switch_radio_on(struct zd_rf *rf)
 137 {
 138         int r, t;
 139         struct zd_chip *chip = zd_rf_to_chip(rf);
 140
 141         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 142         r = zd_chip_lock_phy_regs(chip);
 143         if (r)
 144                 return r;
 145         t = rf->switch_radio_on(rf);
 146         r = zd_chip_unlock_phy_regs(chip);
 147         if (t)
 148                 r = t;
 149         return r;
 150 }
 151
 152 int zd_switch_radio_off(struct zd_rf *rf)
 153 {
 154         int r, t;
 155         struct zd_chip *chip = zd_rf_to_chip(rf);
 156
 157         /* TODO: move phy regs handling to zd_chip */
 158         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 159         r = zd_chip_lock_phy_regs(chip);
 160         if (r)
 161                 return r;
 162         t = rf->switch_radio_off(rf);
 163         r = zd_chip_unlock_phy_regs(chip);
 164         if (t)
 165                 r = t;
 166         return r;
 167 }
 168
 169 int zd_rf_patch_6m_band_edge(struct zd_rf *rf, u8 channel)
 170 {
 171         if (!rf->patch_6m_band_edge)
 172                 return 0;
 173
 174         return rf->patch_6m_band_edge(rf, channel);
 175 }
 176
 177 int zd_rf_generic_patch_6m(struct zd_rf *rf, u8 channel)
 178 {
 179         return zd_chip_generic_patch_6m_band(zd_rf_to_chip(rf), channel);
 180 }
 181