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 *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
  57 void zd_rf_clear(struct zd_rf *rf)
  58 {
  59         memset(rf, 0, sizeof(*rf));
  60 }
  61
  62 int zd_rf_init_hw(struct zd_rf *rf, u8 type)
  63 {
  64         int r, t;
  65         struct zd_chip *chip = zd_rf_to_chip(rf);
  66
  67         ZD_ASSERT(mutex_is_locked(&chip->mutex));
  68         switch (type) {
  69         case RF2959_RF:
  70                 r = zd_rf_init_rf2959(rf);
  71                 if (r)
  72                         return r;
  73                 break;
  74         case AL2230_RF:
  75                 r = zd_rf_init_al2230(rf);
  76                 if (r)
  77                         return r;
  78                 break;
  79         default:
  80                 dev_err(zd_chip_dev(chip),
  81                         "RF %s %#x is not supported\n", zd_rf_name(type), type);
  82                 rf->type = 0;
  83                 return -ENODEV;
  84         }
  85
  86         rf->type = type;
  87
  88         r = zd_chip_lock_phy_regs(chip);
  89         if (r)
  90                 return r;
  91         t = rf->init_hw(rf);
  92         r = zd_chip_unlock_phy_regs(chip);
  93         if (t)
  94                 r = t;
  95         return r;
  96 }
  97
  98 int zd_rf_scnprint_id(struct zd_rf *rf, char *buffer, size_t size)
  99 {
 100         return scnprintf(buffer, size, "%s", zd_rf_name(rf->type));
 101 }
 102
 103 int zd_rf_set_channel(struct zd_rf *rf, u8 channel)
 104 {
 105         int r;
 106
 107         ZD_ASSERT(mutex_is_locked(&zd_rf_to_chip(rf)->mutex));
 108         if (channel < MIN_CHANNEL24)
 109                 return -EINVAL;
 110         if (channel > MAX_CHANNEL24)
 111                 return -EINVAL;
 112         dev_dbg_f(zd_chip_dev(zd_rf_to_chip(rf)), "channel: %d\n", channel);
 113
 114         r = rf->set_channel(rf, channel);
 115         if (r >= 0)
 116                 rf->channel = channel;
 117         return r;
 118 }
 119
 120 int zd_switch_radio_on(struct zd_rf *rf)
 121 {
 122         int r, t;
 123         struct zd_chip *chip = zd_rf_to_chip(rf);
 124
 125         ZD_ASSERT(mutex_is_locked(&chip->mutex));
 126         r = zd_chip_lock_phy_regs(chip);
 127         if (r)
 128                 return r;
 129         t = rf->switch_radio_on(rf);
 130         r = zd_chip_unlock_phy_regs(chip);
 131         if (t)
 132                 r = t;
 133         return r;
 134 }
 135
 136 int zd_switch_radio_off(struct zd_rf *rf)
 137 {
 138         int r, t;
 139         struct zd_chip *chip = zd_rf_to_chip(rf);
 140
 141         /* TODO: move phy regs handling to zd_chip */
 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_off(rf);
 147         r = zd_chip_unlock_phy_regs(chip);
 148         if (t)
 149                 r = t;
 150         return r;
 151 }