drivers/net/wireless/zd1211rw/zd_rf.c

   1 /* zd_rf.c
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17
  18 #include <linux/errno.h>
  19 #include <linux/string.h>
  20
  21 #include "zd_def.h"
  22 #include "zd_rf.h"
  23 #include "zd_ieee80211.h"
  24 #include "zd_chip.h"
  25
  26 static const char * const rfs[] = {
  27         [0]             = "unknown RF0",
  28         [1]             = "unknown RF1",
  29         [UW2451_RF]     = "UW2451_RF",
  30         [UCHIP_RF]      = "UCHIP_RF",
  31         [AL2230_RF]     = "AL2230_RF",
  32         [AL7230B_RF]    = "AL7230B_RF",
  33         [THETA_RF]      = "THETA_RF",
  34         [AL2210_RF]     = "AL2210_RF",
  35         [MAXIM_NEW_RF]  = "MAXIM_NEW_RF",
  36         [UW2453_RF]     = "UW2453_RF",
  37         [AL2230S_RF]    = "AL2230S_RF",
  38         [RALINK_RF]     = "RALINK_RF",
  39         [INTERSIL_RF]   = "INTERSIL_RF",
  40         [RF2959_RF]     = "RF2959_RF",
  41         [MAXIM_NEW2_RF] = "MAXIM_NEW2_RF",
  42         [PHILIPS_RF]    = "PHILIPS_RF",
  43 };
  44
  45 const char *zd_rf_name(u8 type)
  46 {
  47         if (type & 0xf0)
  48                 type = 0;
  49         return rfs[type];
  50 }
  51
  52 void zd_rf_init(struct zd_rf *rf)
  53 {
  54         memset(rf, 0, sizeof(*rf));
  55
  56         /* default to update channel integration, as almost all RF's do want
  57          * this */
  58         rf->update_channel_int = 1;
  59 }
  60
  61 void zd_rf_clear(struct zd_rf *rf)
  62 {
  63         if (rf->clear)
  64                 rf->clear(rf);
  65         ZD_MEMCLEAR(rf, sizeof(*rf));
  66 }
  67
  68 int zd_rf_init_hw(struct zd_rf *rf, u8 type)
  69 {
  70         int r = 0;
  71         int t;
  72         struct zd_chip *chip = zd_rf_to_chip(rf);
  73
  74         ZD_ASSERT(mutex_is_locked(&chip->mutex));
  75         switch (type) {
  76         case RF2959_RF:
  77                 r = zd_rf_init_rf2959(rf);
  78                 break;
  79         case AL2230_RF:
  80         case AL2230S_RF:
  81                 r = zd_rf_init_al2230(rf);
  82                 break;
  83         case AL7230B_RF:
  84                 r = zd_rf_init_al7230b(rf);
  85                 break;
  86         case UW2453_RF:
  87                 r = zd_rf_init_uw2453(rf);
  88                 break;
  89         default:
  90                 dev_err(zd_chip_dev(chip),
  91                         "RF %s %#x is not supported\n", zd_rf_name(type), type);
  92                 rf->type = 0;
  93                 return -ENODEV;
  94         }
  95
  96         if (r)
  97                 return r;
  98
  99         rf->type = type;
 100
 101         r = zd_chip_lock_phy_regs(chip);
 102         if (r)
 103                 return r;
 104         t = rf->init_hw(rf);
 105         r = zd_chip_unlock_phy_regs(chip);
 106         if (t)
 107                 r = t;
 108         return r;
 109 }
 110
 111 int zd_rf_scnprint_id(struct zd_rf *rf, char *buffer, size_t size)
 112 {
 113         return scnprintf(buffer, size, "%s", zd_rf_name(rf->type));
 114 }
 115
 116 int zd_rf_set_channel(struct zd_rf *rf, u8 channel)
 117 {
 118         int r;
 119
 120         ZD_ASSERT(mutex_is_locked(&zd_rf_to_chip(rf)->mutex));
 121         if (channel < MIN_CHANNEL24)
 122                 return -EINVAL;
 123         if (channel > MAX_CHANNEL24)
 124                 return -EINVAL;
 125         dev_dbg_f(zd_chip_dev(zd_rf_to_chip(rf)), "channel: %d\n", channel);
 126
 127         r = rf->set_channel(rf, channel);
 128         if (r >= 0)
 129                 rf->channel = channel;
 130         return r;
 131 }
 132
 133 int zd_switch_radio_on(struct zd_rf *rf)
 134 {
 135         int r, t;
 136         struct zd_chip *chip = zd_rf_to_chip(rf);
 137
 138         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 139         r = zd_chip_lock_phy_regs(chip);
 140         if (r)
 141                 return r;
 142         t = rf->switch_radio_on(rf);
 143         r = zd_chip_unlock_phy_regs(chip);
 144         if (t)
 145                 r = t;
 146         return r;
 147 }
 148
 149 int zd_switch_radio_off(struct zd_rf *rf)
 150 {
 151         int r, t;
 152         struct zd_chip *chip = zd_rf_to_chip(rf);
 153
 154         /* TODO: move phy regs handling to zd_chip */
 155         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 156         r = zd_chip_lock_phy_regs(chip);
 157         if (r)
 158                 return r;
 159         t = rf->switch_radio_off(rf);
 160         r = zd_chip_unlock_phy_regs(chip);
 161         if (t)
 162                 r = t;
 163         return r;
 164 }
 165
 166 int zd_rf_patch_6m_band_edge(struct zd_rf *rf, u8 channel)
 167 {
 168         if (!rf->patch_6m_band_edge)
 169                 return 0;
 170
 171         return rf->patch_6m_band_edge(rf, channel);
 172 }
 173
 174 int zd_rf_generic_patch_6m(struct zd_rf *rf, u8 channel)
 175 {
 176         return zd_chip_generic_patch_6m_band(zd_rf_to_chip(rf), channel);
 177 }
 178