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#include <stdint.h>
#include <stdio.h>
#include <debug.h>
#include <memory.h>
#include <rffe.h>
#include <calypso/tsp.h>
#include <rf/trf6151.h>
/*
* OsmocomBB's definition of system inherent gain is similar to what is
* called "magic gain" (GMagic) in TI's architecture, except that TI's
* GMagic includes TRF6151 LNA gain whereas OBB's definition of system
* inherent gain does not. TI's GMagic is also reckoned in half-dB units
* instead of integral dB. The RF tract is identical between Openmoko
* GTA0x and FreeCalypso FCDEV3B boards, both manufacturers' devices
* have had their GMagic calibrated per unit at the center frequency
* of each supported downlink band at the respective factories, and all
* calibrated values on defect-free units fall in the range between 199
* to 202, with 200 as the round median value. Setting OsmocomBB's notion
* of system inherent gain to 73 dB produces an equivalent of GMagic=200
* in TI's universe, which is more correct than the previous setting of
* 71 dB copied from Compal/Motorola phones, which have a different RFFE.
*/
#define SYSTEM_INHERENT_GAIN 73
/* describe how the RF frontend is wired on the Openmoko GTA0x boards */
#define RITA_RESET TSPACT(0) /* Reset of the Rita TRF6151 */
#define PA_ENABLE TSPACT(9) /* Enable the Power Amplifier */
#define GSM_TXEN TSPACT(3) /* PA GSM switch, low-active */
/* All VCn controls are low-active */
#define ASM_VC1 TSPACT(2) /* Antenna switch VC1 */
#define ASM_VC2 TSPACT(1) /* Antenna switch VC2 */
#define ASM_VC3 TSPACT(4) /* Antenna switch VC3 */
#define IOTA_STROBE TSPEN(0) /* Strobe for the Iota TSP */
#define RITA_STROBE TSPEN(2) /* Strobe for the Rita TSP */
/* switch RF Frontend Mode */
void rffe_mode(enum gsm_band band, int tx)
{
uint16_t tspact = tsp_act_state();
/* First we mask off all bits from the state cache */
tspact &= ~PA_ENABLE;
tspact &= ~GSM_TXEN;
tspact |= ASM_VC1 | ASM_VC2 | ASM_VC3; /* low-active */
switch (band) {
case GSM_BAND_850:
case GSM_BAND_900:
case GSM_BAND_1800:
break;
case GSM_BAND_1900:
tspact &= ~ASM_VC2;
break;
default:
/* TODO return/signal error here */
break;
}
#ifdef CONFIG_TX_ENABLE
/* Then we selectively set the bits on, if required */
if (tx) {
switch (band) {
case GSM_BAND_850:
case GSM_BAND_900:
tspact &= ~ASM_VC3;
break;
case GSM_BAND_1800:
case GSM_BAND_1900:
tspact &= ~ASM_VC1;
tspact |= ASM_VC2;
tspact |= GSM_TXEN;
break;
default:
break;
}
tspact |= PA_ENABLE;
}
#endif /* TRANSMIT_SUPPORT */
tsp_act_update(tspact);
}
/* Returns RF wiring */
uint32_t rffe_get_rx_ports(void)
{
return (1 << PORT_LO) | (1 << PORT_DCS1800) | (1 << PORT_PCS1900);
}
uint32_t rffe_get_tx_ports(void)
{
return (1 << PORT_LO) | (1 << PORT_HI);
}
/* Returns need for IQ swap */
int rffe_iq_swapped(uint16_t band_arfcn, int tx)
{
return trf6151_iq_swapped(band_arfcn, tx);
}
#define MCU_SW_TRACE 0xfffef00e
#define ARM_CONF_REG 0xfffef006
void rffe_init(void)
{
uint16_t reg;
reg = readw(ARM_CONF_REG);
reg &= ~ (1 << 7); /* TSPACT4 I/O function, not nRDYMEM */
writew(reg, ARM_CONF_REG);
reg = readw(MCU_SW_TRACE);
reg &= ~(1 << 1); /* TSPACT9 I/O function, not MAS(1) */
writew(reg, MCU_SW_TRACE);
/* Configure the TSPEN which is connected to the TWL3025 */
tsp_setup(IOTA_STROBE, 1, 0, 0);
trf6151_init(RITA_STROBE, RITA_RESET);
}
uint8_t rffe_get_gain(void)
{
return trf6151_get_gain();
}
void rffe_set_gain(uint8_t dbm)
{
trf6151_set_gain(dbm);
}
const uint8_t system_inherent_gain = SYSTEM_INHERENT_GAIN;
/* Given the expected input level of exp_inp dBm/8 and the target of target_bb
* dBm8, configure the RF Frontend with the respective gain */
void rffe_compute_gain(int16_t exp_inp, int16_t target_bb)
{
trf6151_compute_gain(exp_inp, target_bb);
}
void rffe_rx_win_ctrl(int16_t exp_inp, int16_t target_bb)
{
/* FIXME */
}
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