diff options
Diffstat (limited to 'roms/ipxe/src/drivers/net/rtl818x/rtl8180_max2820.c')
| -rw-r--r-- | roms/ipxe/src/drivers/net/rtl818x/rtl8180_max2820.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/roms/ipxe/src/drivers/net/rtl818x/rtl8180_max2820.c b/roms/ipxe/src/drivers/net/rtl818x/rtl8180_max2820.c new file mode 100644 index 00000000..ab380fcc --- /dev/null +++ b/roms/ipxe/src/drivers/net/rtl818x/rtl8180_max2820.c @@ -0,0 +1,158 @@ +/* + * Radio tuning for Maxim max2820 on RTL8180 + * + * Copyright 2007 Andrea Merello <andreamrl@tiscali.it> + * + * Modified slightly for iPXE, June 2009 by Joshua Oreman. + * + * Code from the BSD driver and the rtl8181 project have been + * very useful to understand certain things + * + * I want to thanks the Authors of such projects and the Ndiswrapper + * project Authors. + * + * A special Big Thanks also is for all people who donated me cards, + * making possible the creation of the original rtl8180 driver + * from which this code is derived! + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <unistd.h> +#include <ipxe/pci.h> +#include <ipxe/net80211.h> + +#include "rtl818x.h" + +FILE_LICENCE(GPL2_ONLY); + +#define MAXIM_ANTENNA 0xb3 + +static const u32 max2820_chan[] = { + 12, /* CH 1 */ + 17, + 22, + 27, + 32, + 37, + 42, + 47, + 52, + 57, + 62, + 67, + 72, + 84, /* CH 14 */ +}; + +static void write_max2820(struct net80211_device *dev, u8 addr, u32 data) +{ + struct rtl818x_priv *priv = dev->priv; + u32 phy_config; + + phy_config = 0x90 + (data & 0xf); + phy_config <<= 16; + phy_config += addr; + phy_config <<= 8; + phy_config += (data >> 4) & 0xff; + + /* This was originally a 32-bit write to a typecast + RFPinsOutput, but gcc complained about aliasing rules. -JBO */ + rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, phy_config & 0xffff); + rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, phy_config >> 16); + + mdelay(1); +} + +static void max2820_write_phy_antenna(struct net80211_device *dev, short chan) +{ + struct rtl818x_priv *priv = dev->priv; + u8 ant; + + ant = MAXIM_ANTENNA; + if (priv->rfparam & RF_PARAM_ANTBDEFAULT) + ant |= BB_ANTENNA_B; + if (chan == 14) + ant |= BB_ANTATTEN_CHAN14; + + rtl818x_write_phy(dev, 0x10, ant); +} + +static void max2820_rf_set_channel(struct net80211_device *dev, + struct net80211_channel *channelp) +{ + struct rtl818x_priv *priv = dev->priv; + int channel = channelp->channel_nr; + unsigned int chan_idx = channel - 1; + u32 txpw = priv->txpower[chan_idx] & 0xFF; + u32 chan = max2820_chan[chan_idx]; + + /* While philips SA2400 drive the PA bias from + * sa2400, for MAXIM we do this directly from BB */ + rtl818x_write_phy(dev, 3, txpw); + + max2820_write_phy_antenna(dev, channel); + write_max2820(dev, 3, chan); +} + +static void max2820_rf_stop(struct net80211_device *dev) +{ + rtl818x_write_phy(dev, 3, 0x8); + write_max2820(dev, 1, 0); +} + + +static void max2820_rf_init(struct net80211_device *dev) +{ + struct rtl818x_priv *priv = dev->priv; + + /* MAXIM from netbsd driver */ + write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */ + write_max2820(dev, 1, 0x01e); /* enable register */ + write_max2820(dev, 2, 0x001); /* synt register */ + + max2820_rf_set_channel(dev, NULL); + + write_max2820(dev, 4, 0x313); /* rx register */ + + /* PA is driven directly by the BB, we keep the MAXIM bias + * at the highest value in case that setting it to lower + * values may introduce some further attenuation somewhere.. + */ + write_max2820(dev, 5, 0x00f); + + /* baseband configuration */ + rtl818x_write_phy(dev, 0, 0x88); /* sys1 */ + rtl818x_write_phy(dev, 3, 0x08); /* txagc */ + rtl818x_write_phy(dev, 4, 0xf8); /* lnadet */ + rtl818x_write_phy(dev, 5, 0x90); /* ifagcinit */ + rtl818x_write_phy(dev, 6, 0x1a); /* ifagclimit */ + rtl818x_write_phy(dev, 7, 0x64); /* ifagcdet */ + + max2820_write_phy_antenna(dev, 1); + + rtl818x_write_phy(dev, 0x11, 0x88); /* trl */ + + if (rtl818x_ioread8(priv, &priv->map->CONFIG2) & + RTL818X_CONFIG2_ANTENNA_DIV) + rtl818x_write_phy(dev, 0x12, 0xc7); + else + rtl818x_write_phy(dev, 0x12, 0x47); + + rtl818x_write_phy(dev, 0x13, 0x9b); + + rtl818x_write_phy(dev, 0x19, 0x0); /* CHESTLIM */ + rtl818x_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */ + + max2820_rf_set_channel(dev, NULL); +} + +struct rtl818x_rf_ops max2820_rf_ops __rtl818x_rf_driver = { + .name = "Maxim max2820", + .id = 4, + .init = max2820_rf_init, + .stop = max2820_rf_stop, + .set_chan = max2820_rf_set_channel +}; |