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ieee802154: mrf24j40: Add support for MRF24J40MC 

The MRF24J40MC module has an external amplifier which should be
enabled. The TX power has to be lowered to meet FCC regs.

Signed-off-by: Simon Vincent <simon.vincent@xsilon.com>
Acked-by: Alan Ott <alan@signal11.us>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Simon Vincent 2014-10-06 10:39:45 +01:00 committed by Marcel Holtmann
parent 4b552bc9ed
commit db9e0ee805
1 changed files with 30 additions and 2 deletions
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32
drivers/net/ieee802154/mrf24j40.c
View File

@ -43,6 +43,8 @@
#define REG_TXSTBL 0x2E /* TX Stabilization */
#define REG_INTSTAT 0x31 /* Interrupt Status */
#define REG_INTCON 0x32 /* Interrupt Control */
#define REG_GPIO 0x33 /* GPIO */
#define REG_TRISGPIO 0x34 /* GPIO direction */
#define REG_RFCTL 0x36 /* RF Control Mode Register */
#define REG_BBREG1 0x39 /* Baseband Registers */
#define REG_BBREG2 0x3A /* */
@ -63,6 +65,7 @@
#define REG_SLPCON1 0x220
#define REG_WAKETIMEL 0x222 /* Wake-up Time Match Value Low */
#define REG_WAKETIMEH 0x223 /* Wake-up Time Match Value High */
#define REG_TESTMODE 0x22F /* Test mode */
#define REG_RX_FIFO 0x300 /* Receive FIFO */
/* Device configuration: Only channels 11-26 on page 0 are supported. */
@ -75,6 +78,8 @@
#define RX_FIFO_SIZE 144 /* From datasheet */
#define SET_CHANNEL_DELAY_US 192 /* From datasheet */
enum mrf24j40_modules { MRF24J40, MRF24J40MA, MRF24J40MC };
/* Device Private Data */
struct mrf24j40 {
struct spi_device *spi;
@ -691,6 +696,28 @@ static int mrf24j40_hw_init(struct mrf24j40 *devrec)
if (ret)
goto err_ret;
if (spi_get_device_id(devrec->spi)->driver_data == MRF24J40MC) {
/* Enable external amplifier.
* From MRF24J40MC datasheet section 1.3: Operation.
*/
read_long_reg(devrec, REG_TESTMODE, &val);
val |= 0x7; /* Configure GPIO 0-2 to control amplifier */
write_long_reg(devrec, REG_TESTMODE, val);
read_short_reg(devrec, REG_TRISGPIO, &val);
val |= 0x8; /* Set GPIO3 as output. */
write_short_reg(devrec, REG_TRISGPIO, val);
read_short_reg(devrec, REG_GPIO, &val);
val |= 0x8; /* Set GPIO3 HIGH to enable U5 voltage regulator */
write_short_reg(devrec, REG_GPIO, val);
/* Reduce TX pwr to meet FCC requirements.
* From MRF24J40MC datasheet section 3.1.1
*/
write_long_reg(devrec, REG_RFCON3, 0x28);
}
return 0;
err_ret:
@ -779,8 +806,9 @@ static int mrf24j40_remove(struct spi_device *spi)
}
static const struct spi_device_id mrf24j40_ids[] = {
{ "mrf24j40", 0 },
{ "mrf24j40ma", 0 },
{ "mrf24j40", MRF24J40 },
{ "mrf24j40ma", MRF24J40MA },
{ "mrf24j40mc", MRF24J40MC },
{ },
};
MODULE_DEVICE_TABLE(spi, mrf24j40_ids);