iPXE
rtl8180_max2820.c
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1 /*
2  * Radio tuning for Maxim max2820 on RTL8180
3  *
4  * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
5  *
6  * Modified slightly for iPXE, June 2009 by Joshua Oreman.
7  *
8  * Code from the BSD driver and the rtl8181 project have been
9  * very useful to understand certain things
10  *
11  * I want to thanks the Authors of such projects and the Ndiswrapper
12  * project Authors.
13  *
14  * A special Big Thanks also is for all people who donated me cards,
15  * making possible the creation of the original rtl8180 driver
16  * from which this code is derived!
17  *
18  * This program is free software; you can redistribute it and/or modify
19  * it under the terms of the GNU General Public License version 2 as
20  * published by the Free Software Foundation.
21  */
22 
23 #include <unistd.h>
24 #include <ipxe/pci.h>
25 #include <ipxe/net80211.h>
26 
27 #include "rtl818x.h"
28 
29 FILE_LICENCE(GPL2_ONLY);
30 
31 #define MAXIM_ANTENNA 0xb3
32 
33 static const u32 max2820_chan[] = {
34  12, /* CH 1 */
35  17,
36  22,
37  27,
38  32,
39  37,
40  42,
41  47,
42  52,
43  57,
44  62,
45  67,
46  72,
47  84, /* CH 14 */
48 };
49 
50 static void write_max2820(struct net80211_device *dev, u8 addr, u32 data)
51 {
52  struct rtl818x_priv *priv = dev->priv;
53  u32 phy_config;
54 
55  phy_config = 0x90 + (data & 0xf);
56  phy_config <<= 16;
57  phy_config += addr;
58  phy_config <<= 8;
59  phy_config += (data >> 4) & 0xff;
60 
61  /* This was originally a 32-bit write to a typecast
62  RFPinsOutput, but gcc complained about aliasing rules. -JBO */
63  rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff);
64  rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16);
65 
66  mdelay(1);
67 }
68 
69 static void max2820_write_phy_antenna(struct net80211_device *dev, short chan)
70 {
71  struct rtl818x_priv *priv = dev->priv;
72  u8 ant;
73 
74  ant = MAXIM_ANTENNA;
75  if (priv->rfparam & RF_PARAM_ANTBDEFAULT)
76  ant |= BB_ANTENNA_B;
77  if (chan == 14)
78  ant |= BB_ANTATTEN_CHAN14;
79 
80  rtl818x_write_phy(dev, 0x10, ant);
81 }
82 
83 static void max2820_rf_set_channel(struct net80211_device *dev,
84  struct net80211_channel *channelp)
85 {
86  struct rtl818x_priv *priv = dev->priv;
87  int channel = channelp->channel_nr;
88  unsigned int chan_idx = channel - 1;
89  u32 txpw = priv->txpower[chan_idx] & 0xFF;
90  u32 chan = max2820_chan[chan_idx];
91 
92  /* While philips SA2400 drive the PA bias from
93  * sa2400, for MAXIM we do this directly from BB */
94  rtl818x_write_phy(dev, 3, txpw);
95 
97  write_max2820(dev, 3, chan);
98 }
99 
100 static void max2820_rf_stop(struct net80211_device *dev)
101 {
102  rtl818x_write_phy(dev, 3, 0x8);
103  write_max2820(dev, 1, 0);
104 }
105 
106 
107 static void max2820_rf_init(struct net80211_device *dev)
108 {
109  struct rtl818x_priv *priv = dev->priv;
110 
111  /* MAXIM from netbsd driver */
112  write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */
113  write_max2820(dev, 1, 0x01e); /* enable register */
114  write_max2820(dev, 2, 0x001); /* synt register */
115 
117 
118  write_max2820(dev, 4, 0x313); /* rx register */
119 
120  /* PA is driven directly by the BB, we keep the MAXIM bias
121  * at the highest value in case that setting it to lower
122  * values may introduce some further attenuation somewhere..
123  */
124  write_max2820(dev, 5, 0x00f);
125 
126  /* baseband configuration */
127  rtl818x_write_phy(dev, 0, 0x88); /* sys1 */
128  rtl818x_write_phy(dev, 3, 0x08); /* txagc */
129  rtl818x_write_phy(dev, 4, 0xf8); /* lnadet */
130  rtl818x_write_phy(dev, 5, 0x90); /* ifagcinit */
131  rtl818x_write_phy(dev, 6, 0x1a); /* ifagclimit */
132  rtl818x_write_phy(dev, 7, 0x64); /* ifagcdet */
133 
135 
136  rtl818x_write_phy(dev, 0x11, 0x88); /* trl */
137 
138  if (rtl818x_ioread8(priv, &priv->map->CONFIG2) &
140  rtl818x_write_phy(dev, 0x12, 0xc7);
141  else
142  rtl818x_write_phy(dev, 0x12, 0x47);
143 
144  rtl818x_write_phy(dev, 0x13, 0x9b);
145 
146  rtl818x_write_phy(dev, 0x19, 0x0); /* CHESTLIM */
147  rtl818x_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */
148 
150 }
151 
152 struct rtl818x_rf_ops max2820_rf_ops __rtl818x_rf_driver = {
153  .name = "Maxim max2820",
154  .id = 4,
155  .init = max2820_rf_init,
156  .stop = max2820_rf_stop,
157  .set_chan = max2820_rf_set_channel
158 };
char * name
Definition: rtl818x.h:352
FILE_LICENCE(GPL2_ONLY)
void rtl818x_write_phy(struct net80211_device *dev, u8 addr, u32 data)
Definition: rtl818x.c:46
static u8 rtl818x_ioread8(struct rtl818x_priv *priv __unused, u8 *addr)
Definition: rtl818x.h:315
static void max2820_write_phy_antenna(struct net80211_device *dev, short chan)
static void max2820_rf_set_channel(struct net80211_device *dev, struct net80211_channel *channelp)
static void max2820_rf_init(struct net80211_device *dev)
#define BB_ANTENNA_B
Definition: rtl818x.h:205
#define MAXIM_ANTENNA
uint32_t channel
RNDIS channel.
Definition: netvsc.h:14
void * priv
Driver private data.
Definition: net80211.h:798
#define BB_ANTATTEN_CHAN14
Definition: rtl818x.h:204
The iPXE 802.11 MAC layer.
PCI bus.
Structure encapsulating the complete state of an 802.11 device.
Definition: net80211.h:786
An 802.11 RF channel.
Definition: net80211.h:385
u32 addr
Definition: sky2.h:8
static const u32 max2820_chan[]
struct rtl818x_rf_ops max2820_rf_ops __rtl818x_rf_driver
void mdelay(unsigned long msecs)
Delay for a fixed number of milliseconds.
Definition: timer.c:78
static struct tlan_private * priv
Definition: tlan.c:224
static void write_max2820(struct net80211_device *dev, u8 addr, u32 data)
static void rtl818x_iowrite16(struct rtl818x_priv *priv __unused, u16 *addr, u16 val)
Definition: rtl818x.h:336
struct arbelprm_port_state_change_st data
Message.
Definition: arbel.h:12
u8 channel_nr
A channel number interpreted according to the band.
Definition: net80211.h:405
#define RF_PARAM_ANTBDEFAULT
Definition: rtl818x.h:200
#define NULL
NULL pointer (VOID *)
Definition: Base.h:362
static void max2820_rf_stop(struct net80211_device *dev)
uint8_t u8
Definition: stdint.h:19
uint32_t u32
Definition: stdint.h:23
#define RTL818X_CONFIG2_ANTENNA_DIV
Definition: rtl818x.h:114