static void synth_freq_set(struct agnx_priv *priv, unsigned int channel)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
/* Set the Clock bits to 50NS */
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xF;
reg |= 0x1;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
/* Write 0x00c0 to LSW and 0x3 to MSW of Synth Chip */
spi_sy_write(ctl, SYNTH_CHIP, 0x300c0);
spi_sy_write(ctl, SYNTH_CHIP, 0x32);
/* # Write to Register 1 on the Synth Chip */
channel_tbl_write(priv, channel, 1);
/* # Write to Register 3 on the Synth Chip */
channel_tbl_write(priv, channel, 3);
/* # Write to Register 6 on the Synth Chip */
channel_tbl_write(priv, channel, 6);
/* # Write to Register 5 on the Synth Chip */
channel_tbl_write(priv, channel, 5);
/* # Write to register 8 on the Synth Chip */
channel_tbl_write(priv, channel, 8);
/* FIXME Clear the clock bits */
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xf;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
} /* synth_chip_init */
/* Get the active chains's count */
static int get_active_chains(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
int num = 0;
u32 reg;
AGNX_TRACE;
spi_rc_write(ctl, RF_CHIP0, 0x21);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (reg == 1)
num++;
spi_rc_write(ctl, RF_CHIP1, 0x21);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (reg == 1)
num++;
spi_rc_write(ctl, RF_CHIP2, 0x21);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (reg == 1)
num++;
spi_rc_write(ctl, RF_CHIP0, 0x26);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (0x33 != reg)
printk(KERN_WARNING PFX "Unmatched rf chips result\n");
return num;
} /* get_active_chains */
static int agnx_get_mac_address(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
/* Attention! directly read the MAC or other date from EEPROM will
lead to cardbus(WGM511) lock up when write to PM PLL register */
reg = agnx_read32(ctl, 0x3544);
udelay(40);
reg = agnx_read32(ctl, 0x354c);
udelay(50);
/* Get the mac address */
reg = agnx_read32(ctl, 0x3544);
udelay(40);
/* HACK */
reg = cpu_to_le32(reg);
priv->mac_addr[0] = ((u8 *)®)[2];
priv->mac_addr[1] = ((u8 *)®)[3];
reg = agnx_read32(ctl, 0x3548);
udelay(50);
*((u32 *)(priv->mac_addr + 2)) = cpu_to_le32(reg);
if (!is_valid_ether_addr(priv->mac_addr)) {
printk(KERN_WARNING PFX "read mac %pM\n", priv->mac_addr);
printk(KERN_WARNING PFX "Invalid hwaddr! Using random hwaddr\n");
random_ether_addr(priv->mac_addr);
}
return 0;
} /* agnx_get_mac_address */
void __antenna_calibrate(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
/* Calibrate the BaseBandFilter */
/* base_band_filter_calibrate(priv); */
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1002);
agnx_write32(ctl, AGNX_GCR_GAINSET0, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSET1, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSET2, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSETWRITE, 0x1);
agnx_write32(ctl, AGNX_ACI_MODE, 0x1);
agnx_write32(ctl, AGNX_ACI_LEN, 0x3ff);
agnx_write32(ctl, AGNX_ACI_TIMER1, 0x27);
agnx_write32(ctl, AGNX_ACI_TIMER2, 0x27);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1400);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1500);
/* Measure Calibration */
agnx_write32(ctl, AGNX_ACI_MEASURE, 0x1);
calibra_delay(priv);
do_calibration(priv);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
agnx_write32(ctl, AGNX_ACI_TIMER1, 0x21);
agnx_write32(ctl, AGNX_ACI_TIMER2, 0x27);
agnx_write32(ctl, AGNX_ACI_LEN, 0xf);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET0);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET0, reg);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET1);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET1, reg);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET2);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET2, reg);
agnx_write32(ctl, AGNX_GCR_GAINSETWRITE, 0x0);
/* Write 0x3 Gain Control Discovery Mode */
enable_receiver(priv);
}
void rf_chips_init(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
int num;
AGNX_TRACE;
if (priv->revid == 1) {
reg = agnx_read32(ctl, AGNX_SYSITF_GPIOUT);
reg |= 0x8;
agnx_write32(ctl, AGNX_SYSITF_GPIOUT, reg);
}
/* Set SPI clock speed to 200NS */
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xF;
reg |= 0x3;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
/* Set SPI clock speed to 50NS */
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xF;
reg |= 0x1;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1101);
num = get_active_chains(priv);
printk(KERN_INFO PFX "Active chains are %d\n", num);
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xF;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1908);
} /* rf_chips_init */
void calibrate_oscillator(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
spi_rc_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET1);
reg |= 0x10;
agnx_write32(ctl, AGNX_GCR_GAINSET1, reg);
agnx_write32(ctl, AGNX_GCR_GAINSETWRITE, 1);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 1);
agnx_write32(ctl, AGNX_ACI_LEN, 0x3ff);
agnx_write32(ctl, AGNX_ACI_TIMER1, 0x27);
agnx_write32(ctl, AGNX_ACI_TIMER2, 0x27);
/* (Residual DC Calibration) to Calibration Mode */
agnx_write32(ctl, AGNX_ACI_MODE, 0x2);
spi_rc_write(ctl, RF_CHIP0|RF_CHIP1, 0x1004);
agnx_write32(ctl, AGNX_ACI_LEN, 0x3ff);
/* (TX LO Calibration) to Calibration Mode */
agnx_write32(ctl, AGNX_ACI_MODE, 0x4);
do {
u32 reg1, reg2, reg3;
/* Enable Power Saving Control */
enable_power_saving(priv);
/* Save the following registers to restore */
reg1 = ioread32(ctl + 0x11000);
reg2 = ioread32(ctl + 0xec50);
reg3 = ioread32(ctl + 0xec54);
wmb();
agnx_write32(ctl, 0x11000, 0xcfdf);
agnx_write32(ctl, 0xec50, 0x70);
/* Restore the registers */
agnx_write32(ctl, 0x11000, reg1);
agnx_write32(ctl, 0xec50, reg2);
agnx_write32(ctl, 0xec54, reg3);
/* Disable Power Saving Control */
disable_power_saving(priv);
} while (0);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0);
} /* calibrate_oscillator */
static void antenna_config(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
/* Write 0x0 to the TX Management Control Register Enable bit */
reg = agnx_read32(ctl, AGNX_TXM_CTL);
reg &= ~0x1;
agnx_write32(ctl, AGNX_TXM_CTL, reg);
/* FIXME */
/* Set initial value based on number of Antennae */
antenna_init(priv, 3);
/* FIXME Update Power Templates for current valid Stations */
/* sta_power_init(priv, 0);*/
/* FIXME the number of chains should get from eeprom*/
chain_update(priv, AGNX_CHAINS_MAX);
} /* antenna_config */
void antenna_calibrate(struct agnx_priv *priv)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
agnx_write32(ctl, AGNX_GCR_NLISTANT, 0x3);
agnx_write32(ctl, AGNX_GCR_NMEASANT, 0x3);
agnx_write32(ctl, AGNX_GCR_NACTIANT, 0x3);
agnx_write32(ctl, AGNX_GCR_NCAPTANT, 0x3);
agnx_write32(ctl, AGNX_GCR_ANTCFG, 0x1f);
agnx_write32(ctl, AGNX_GCR_BOACT, 0x24);
agnx_write32(ctl, AGNX_GCR_BOINACT, 0x24);
agnx_write32(ctl, AGNX_GCR_BODYNA, 0x20);
agnx_write32(ctl, AGNX_GCR_THD0A, 0x64);
agnx_write32(ctl, AGNX_GCR_THD0AL, 0x64);
agnx_write32(ctl, AGNX_GCR_THD0B, 0x46);
agnx_write32(ctl, AGNX_GCR_THD0BTFEST, 0x3c);
agnx_write32(ctl, AGNX_GCR_SIGHTH, 0x64);
agnx_write32(ctl, AGNX_GCR_SIGLTH, 0x30);
spi_rc_write(ctl, RF_CHIP0, 0x20);
/* Fixme */
udelay(80);
/* 1. Should read 0x0 */
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (0x0 != reg)
printk(KERN_WARNING PFX "Unmatched rf chips result\n");
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1000);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
spi_rc_write(ctl, RF_CHIP0, 0x22);
udelay(80);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (0x0 != reg)
printk(KERN_WARNING PFX "Unmatched rf chips result\n");
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1005);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x1);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x0);
reg = agnx_read32(ctl, AGNX_PM_SOFTRST);
reg |= 0x1c000032;
agnx_write32(ctl, AGNX_PM_SOFTRST, reg);
reg = agnx_read32(ctl, AGNX_PM_PLLCTL);
reg |= 0x0003f07;
agnx_write32(ctl, AGNX_PM_PLLCTL, reg);
reg = agnx_read32(ctl, 0xec50);
reg |= 0x40;
agnx_write32(ctl, 0xec50, reg);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0xff8);
agnx_write32(ctl, AGNX_GCR_DISCOVMOD, 0x3);
agnx_write32(ctl, AGNX_GCR_CHAINNUM, 0x6);
agnx_write32(ctl, 0x19874, 0x0);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1700);
/* Calibrate the BaseBandFilter */
base_band_filter_calibrate(priv);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1002);
agnx_write32(ctl, AGNX_GCR_GAINSET0, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSET1, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSET2, 0x1d);
agnx_write32(ctl, AGNX_GCR_GAINSETWRITE, 0x1);
agnx_write32(ctl, AGNX_ACI_MODE, 0x1);
agnx_write32(ctl, AGNX_ACI_LEN, 0x3ff);
agnx_write32(ctl, AGNX_ACI_TIMER1, 0x27);
agnx_write32(ctl, AGNX_ACI_TIMER2, 0x27);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1400);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1500);
/* Measure Calibration */
agnx_write32(ctl, AGNX_ACI_MEASURE, 0x1);
calibra_delay(priv);
/* do calibration */
do_calibration(priv);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
agnx_write32(ctl, AGNX_ACI_TIMER1, 0x21);
agnx_write32(ctl, AGNX_ACI_TIMER2, 0x27);
agnx_write32(ctl, AGNX_ACI_LEN, 0xf);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET0);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET0, reg);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET1);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET1, reg);
reg = agnx_read32(ctl, AGNX_GCR_GAINSET2);
reg &= 0xf;
agnx_write32(ctl, AGNX_GCR_GAINSET2, reg);
agnx_write32(ctl, AGNX_GCR_GAINSETWRITE, 0x0);
disable_receiver(priv);
} /* antenna_calibrate */
static void radio_channel_set(struct agnx_priv *priv, unsigned int channel)
{
void __iomem *ctl = priv->ctl;
unsigned int freq = priv->band.channels[channel - 1].center_freq;
u32 reg;
AGNX_TRACE;
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
/* Set SPI Clock to 50 Ns */
reg = agnx_read32(ctl, AGNX_SPI_CFG);
reg &= ~0xF;
reg |= 0x1;
agnx_write32(ctl, AGNX_SPI_CFG, reg);
/* Clear the Disable Tx interrupt bit in Interrupt Mask */
/* reg = agnx_read32(ctl, AGNX_INT_MASK); */
/* reg &= ~IRQ_TX_DISABLE; */
/* agnx_write32(ctl, AGNX_INT_MASK, reg); */
/* Band Selection */
reg = agnx_read32(ctl, AGNX_SYSITF_GPIOUT);
reg |= 0x8;
agnx_write32(ctl, AGNX_SYSITF_GPIOUT, reg);
/* FIXME Set the SiLabs Chip Frequency */
synth_freq_set(priv, channel);
reg = agnx_read32(ctl, AGNX_PM_SOFTRST);
reg |= 0x80100030;
agnx_write32(ctl, AGNX_PM_SOFTRST, reg);
reg = agnx_read32(ctl, AGNX_PM_PLLCTL);
reg |= 0x20009;
agnx_write32(ctl, AGNX_PM_PLLCTL, reg);
agnx_write32(ctl, AGNX_SYSITF_GPIOUT, 0x5);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1100);
/* Load the MonitorGain Table */
monitor_gain_table_init(priv);
/* Load the TX Fir table */
tx_fir_table_init(priv);
reg = agnx_read32(ctl, AGNX_PM_PMCTL);
reg |= 0x8;
agnx_write32(ctl, AGNX_PM_PMCTL, reg);
spi_rc_write(ctl, RF_CHIP0|RF_CHIP1, 0x22);
udelay(80);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0xff);
agnx_write32(ctl, AGNX_GCR_DISCOVMOD, 0x3);
reg = agnx_read32(ctl, 0xec50);
reg |= 0x4f;
agnx_write32(ctl, 0xec50, reg);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
agnx_write32(ctl, 0x11008, 0x1);
agnx_write32(ctl, 0x1100c, 0x0);
agnx_write32(ctl, 0x11008, 0x0);
agnx_write32(ctl, 0xec50, 0xc);
agnx_write32(ctl, AGNX_GCR_DISCOVMOD, 0x3);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
agnx_write32(ctl, 0x11010, 0x6e);
agnx_write32(ctl, 0x11014, 0x6c);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
/* Calibrate the Antenna */
/* antenna_calibrate(priv); */
/* Calibrate the TxLocalOscillator */
calibrate_oscillator(priv);
reg = agnx_read32(ctl, AGNX_PM_PMCTL);
reg &= ~0x8;
agnx_write32(ctl, AGNX_PM_PMCTL, reg);
agnx_write32(ctl, AGNX_GCR_GAININIT, 0xa);
agnx_write32(ctl, AGNX_GCR_THCD, 0x0);
agnx_write32(ctl, 0x11018, 0xb);
agnx_write32(ctl, AGNX_GCR_DISCOVMOD, 0x0);
/* Write Frequency to Gain Control Channel */
agnx_write32(ctl, AGNX_GCR_RXCHANEL, freq);
/* Write 0x140000/Freq to 0x9c08 */
reg = 0x140000/freq;
agnx_write32(ctl, 0x9c08, reg);
reg = agnx_read32(ctl, AGNX_PM_SOFTRST);
reg &= ~0x80100030;
agnx_write32(ctl, AGNX_PM_SOFTRST, reg);
reg = agnx_read32(ctl, AGNX_PM_PLLCTL);
reg &= ~0x20009;
reg |= 0x1;
agnx_write32(ctl, AGNX_PM_PLLCTL, reg);
agnx_write32(ctl, AGNX_ACI_MODE, 0x0);
/* FIXME According to Number of Chains: */
/* 1. 1: */
/* 1. Write 0x1203 to RF Chip 0 */
/* 2. Write 0x1200 to RF Chips 1 +2 */
/* 2. 2: */
/* 1. Write 0x1203 to RF Chip 0 */
/* 2. Write 0x1200 to RF Chip 2 */
/* 3. Write 0x1201 to RF Chip 1 */
/* 3. 3: */
/* 1. Write 0x1203 to RF Chip 0 */
/* 2. Write 0x1201 to RF Chip 1 + 2 */
/* 4. 4: */
/* 1. Write 0x1203 to RF Chip 0 + 1 */
/* 2. Write 0x1200 to RF Chip 2 */
/* 5. 6: */
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1203);
spi_rf_write(ctl, RF_CHIP2, 0x1201);
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1000);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
/* FIXME Set the Disable Tx interrupt bit in Interrupt Mask
(Or 0x20000 to Interrupt Mask) */
/* reg = agnx_read32(ctl, AGNX_INT_MASK); */
/* reg |= IRQ_TX_DISABLE; */
/* agnx_write32(ctl, AGNX_INT_MASK, reg); */
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x1);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x0);
/* Configure the Antenna */
antenna_config(priv);
/* Write 0x0 to Discovery Mode Enable detect G, B, A packet? */
agnx_write32(ctl, AGNX_GCR_DISCOVMOD, 0);
reg = agnx_read32(ctl, AGNX_RXM_REQRATE);
reg |= 0x80000000;
agnx_write32(ctl, AGNX_RXM_REQRATE, reg);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x1);
agnx_write32(ctl, AGNX_GCR_RSTGCTL, 0x0);
/* enable radio on and the power LED */
reg = agnx_read32(ctl, AGNX_SYSITF_GPIOUT);
reg &= ~0x1;
reg |= 0x2;
agnx_write32(ctl, AGNX_SYSITF_GPIOUT, reg);
reg = agnx_read32(ctl, AGNX_TXM_CTL);
reg |= 0x1;
agnx_write32(ctl, AGNX_TXM_CTL, reg);
} /* radio_channel_set */
static void chain_update(struct agnx_priv *priv, u32 chain)
{
void __iomem *ctl = priv->ctl;
u32 reg;
AGNX_TRACE;
spi_rc_write(ctl, RF_CHIP0, 0x20);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
if (reg == 0x4)
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, reg|0x1000);
else if (reg != 0x0)
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, reg|0x1000);
else {
if (chain == 3 || chain == 6) {
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, reg|0x1000);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x0);
} else if (chain == 2 || chain == 4) {
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, reg|0x1000);
spi_rf_write(ctl, RF_CHIP2, 0x1005);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0x824);
} else if (chain == 1) {
spi_rf_write(ctl, RF_CHIP0, reg|0x1000);
spi_rf_write(ctl, RF_CHIP1|RF_CHIP2, 0x1004);
agnx_write32(ctl, AGNX_GCR_RXOVERIDE, 0xc36);
}
}
spi_rc_write(ctl, RF_CHIP0, 0x22);
reg = agnx_read32(ctl, AGNX_SPI_RLSW);
switch (reg) {
case 0:
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1|RF_CHIP2, 0x1005);
break;
case 1:
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1201);
break;
case 2:
if (chain == 6 || chain == 4) {
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1202);
spi_rf_write(ctl, RF_CHIP2, 0x1005);
} else if (chain < 3) {
spi_rf_write(ctl, RF_CHIP0, 0x1202);
spi_rf_write(ctl, RF_CHIP1|RF_CHIP2, 0x1005);
}
break;
default:
if (chain == 3) {
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1203);
spi_rf_write(ctl, RF_CHIP2, 0x1201);
} else if (chain == 2) {
spi_rf_write(ctl, RF_CHIP0, 0x1203);
spi_rf_write(ctl, RF_CHIP2, 0x1200);
spi_rf_write(ctl, RF_CHIP1, 0x1201);
} else if (chain == 1) {
spi_rf_write(ctl, RF_CHIP0, 0x1203);
spi_rf_write(ctl, RF_CHIP1|RF_CHIP2, 0x1200);
} else if (chain == 4) {
spi_rf_write(ctl, RF_CHIP0|RF_CHIP1, 0x1203);
spi_rf_write(ctl, RF_CHIP2, 0x1201);
} else {
spi_rf_write(ctl, RF_CHIP0, 0x1203);
spi_rf_write(ctl, RF_CHIP1|RF_CHIP2, 0x1201);
}
}
} /* chain_update */
