diff options
Diffstat (limited to 'drivers/media/dvb/frontends/sp887x.c')
| -rw-r--r-- | drivers/media/dvb/frontends/sp887x.c | 629 |
1 files changed, 0 insertions, 629 deletions
diff --git a/drivers/media/dvb/frontends/sp887x.c b/drivers/media/dvb/frontends/sp887x.c deleted file mode 100644 index f4096ccb226e..000000000000 --- a/drivers/media/dvb/frontends/sp887x.c +++ /dev/null @@ -1,629 +0,0 @@ -/* - Driver for the Spase sp887x demodulator -*/ - -/* - * This driver needs external firmware. Please use the command - * "<kerneldir>/Documentation/dvb/get_dvb_firmware sp887x" to - * download/extract it, and then copy it to /usr/lib/hotplug/firmware - * or /lib/firmware (depending on configuration of firmware hotplug). - */ -#define SP887X_DEFAULT_FIRMWARE "dvb-fe-sp887x.fw" - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/firmware.h> -#include <linux/string.h> -#include <linux/slab.h> - -#include "dvb_frontend.h" -#include "sp887x.h" - - -struct sp887x_state { - struct i2c_adapter* i2c; - const struct sp887x_config* config; - struct dvb_frontend frontend; - - /* demodulator private data */ - u8 initialised:1; -}; - -static int debug; -#define dprintk(args...) \ - do { \ - if (debug) printk(KERN_DEBUG "sp887x: " args); \ - } while (0) - -static int i2c_writebytes (struct sp887x_state* state, u8 *buf, u8 len) -{ - struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = len }; - int err; - - if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) { - printk ("%s: i2c write error (addr %02x, err == %i)\n", - __func__, state->config->demod_address, err); - return -EREMOTEIO; - } - - return 0; -} - -static int sp887x_writereg (struct sp887x_state* state, u16 reg, u16 data) -{ - u8 b0 [] = { reg >> 8 , reg & 0xff, data >> 8, data & 0xff }; - struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 4 }; - int ret; - - if ((ret = i2c_transfer(state->i2c, &msg, 1)) != 1) { - /** - * in case of soft reset we ignore ACK errors... - */ - if (!(reg == 0xf1a && data == 0x000 && - (ret == -EREMOTEIO || ret == -EFAULT))) - { - printk("%s: writereg error " - "(reg %03x, data %03x, ret == %i)\n", - __func__, reg & 0xffff, data & 0xffff, ret); - return ret; - } - } - - return 0; -} - -static int sp887x_readreg (struct sp887x_state* state, u16 reg) -{ - u8 b0 [] = { reg >> 8 , reg & 0xff }; - u8 b1 [2]; - int ret; - struct i2c_msg msg[] = {{ .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 2 }, - { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 2 }}; - - if ((ret = i2c_transfer(state->i2c, msg, 2)) != 2) { - printk("%s: readreg error (ret == %i)\n", __func__, ret); - return -1; - } - - return (((b1[0] << 8) | b1[1]) & 0xfff); -} - -static void sp887x_microcontroller_stop (struct sp887x_state* state) -{ - dprintk("%s\n", __func__); - sp887x_writereg(state, 0xf08, 0x000); - sp887x_writereg(state, 0xf09, 0x000); - - /* microcontroller STOP */ - sp887x_writereg(state, 0xf00, 0x000); -} - -static void sp887x_microcontroller_start (struct sp887x_state* state) -{ - dprintk("%s\n", __func__); - sp887x_writereg(state, 0xf08, 0x000); - sp887x_writereg(state, 0xf09, 0x000); - - /* microcontroller START */ - sp887x_writereg(state, 0xf00, 0x001); -} - -static void sp887x_setup_agc (struct sp887x_state* state) -{ - /* setup AGC parameters */ - dprintk("%s\n", __func__); - sp887x_writereg(state, 0x33c, 0x054); - sp887x_writereg(state, 0x33b, 0x04c); - sp887x_writereg(state, 0x328, 0x000); - sp887x_writereg(state, 0x327, 0x005); - sp887x_writereg(state, 0x326, 0x001); - sp887x_writereg(state, 0x325, 0x001); - sp887x_writereg(state, 0x324, 0x001); - sp887x_writereg(state, 0x318, 0x050); - sp887x_writereg(state, 0x317, 0x3fe); - sp887x_writereg(state, 0x316, 0x001); - sp887x_writereg(state, 0x313, 0x005); - sp887x_writereg(state, 0x312, 0x002); - sp887x_writereg(state, 0x306, 0x000); - sp887x_writereg(state, 0x303, 0x000); -} - -#define BLOCKSIZE 30 -#define FW_SIZE 0x4000 -/** - * load firmware and setup MPEG interface... - */ -static int sp887x_initial_setup (struct dvb_frontend* fe, const struct firmware *fw) -{ - struct sp887x_state* state = fe->demodulator_priv; - u8 buf [BLOCKSIZE+2]; - int i; - int fw_size = fw->size; - const unsigned char *mem = fw->data; - - dprintk("%s\n", __func__); - - /* ignore the first 10 bytes, then we expect 0x4000 bytes of firmware */ - if (fw_size < FW_SIZE+10) - return -ENODEV; - - mem = fw->data + 10; - - /* soft reset */ - sp887x_writereg(state, 0xf1a, 0x000); - - sp887x_microcontroller_stop (state); - - printk ("%s: firmware upload... ", __func__); - - /* setup write pointer to -1 (end of memory) */ - /* bit 0x8000 in address is set to enable 13bit mode */ - sp887x_writereg(state, 0x8f08, 0x1fff); - - /* dummy write (wrap around to start of memory) */ - sp887x_writereg(state, 0x8f0a, 0x0000); - - for (i = 0; i < FW_SIZE; i += BLOCKSIZE) { - int c = BLOCKSIZE; - int err; - - if (i+c > FW_SIZE) - c = FW_SIZE - i; - - /* bit 0x8000 in address is set to enable 13bit mode */ - /* bit 0x4000 enables multibyte read/write transfers */ - /* write register is 0xf0a */ - buf[0] = 0xcf; - buf[1] = 0x0a; - - memcpy(&buf[2], mem + i, c); - - if ((err = i2c_writebytes (state, buf, c+2)) < 0) { - printk ("failed.\n"); - printk ("%s: i2c error (err == %i)\n", __func__, err); - return err; - } - } - - /* don't write RS bytes between packets */ - sp887x_writereg(state, 0xc13, 0x001); - - /* suppress clock if (!data_valid) */ - sp887x_writereg(state, 0xc14, 0x000); - - /* setup MPEG interface... */ - sp887x_writereg(state, 0xc1a, 0x872); - sp887x_writereg(state, 0xc1b, 0x001); - sp887x_writereg(state, 0xc1c, 0x000); /* parallel mode (serial mode == 1) */ - sp887x_writereg(state, 0xc1a, 0x871); - - /* ADC mode, 2 for MT8872, 3 for SP8870/SP8871 */ - sp887x_writereg(state, 0x301, 0x002); - - sp887x_setup_agc(state); - - /* bit 0x010: enable data valid signal */ - sp887x_writereg(state, 0xd00, 0x010); - sp887x_writereg(state, 0x0d1, 0x000); - return 0; -}; - -static int configure_reg0xc05(struct dtv_frontend_properties *p, u16 *reg0xc05) -{ - int known_parameters = 1; - - *reg0xc05 = 0x000; - - switch (p->modulation) { - case QPSK: - break; - case QAM_16: - *reg0xc05 |= (1 << 10); - break; - case QAM_64: - *reg0xc05 |= (2 << 10); - break; - case QAM_AUTO: - known_parameters = 0; - break; - default: - return -EINVAL; - }; - - switch (p->hierarchy) { - case HIERARCHY_NONE: - break; - case HIERARCHY_1: - *reg0xc05 |= (1 << 7); - break; - case HIERARCHY_2: - *reg0xc05 |= (2 << 7); - break; - case HIERARCHY_4: - *reg0xc05 |= (3 << 7); - break; - case HIERARCHY_AUTO: - known_parameters = 0; - break; - default: - return -EINVAL; - }; - - switch (p->code_rate_HP) { - case FEC_1_2: - break; - case FEC_2_3: - *reg0xc05 |= (1 << 3); - break; - case FEC_3_4: - *reg0xc05 |= (2 << 3); - break; - case FEC_5_6: - *reg0xc05 |= (3 << 3); - break; - case FEC_7_8: - *reg0xc05 |= (4 << 3); - break; - case FEC_AUTO: - known_parameters = 0; - break; - default: - return -EINVAL; - }; - - if (known_parameters) - *reg0xc05 |= (2 << 1); /* use specified parameters */ - else - *reg0xc05 |= (1 << 1); /* enable autoprobing */ - - return 0; -} - -/** - * estimates division of two 24bit numbers, - * derived from the ves1820/stv0299 driver code - */ -static void divide (int n, int d, int *quotient_i, int *quotient_f) -{ - unsigned int q, r; - - r = (n % d) << 8; - q = (r / d); - - if (quotient_i) - *quotient_i = q; - - if (quotient_f) { - r = (r % d) << 8; - q = (q << 8) | (r / d); - r = (r % d) << 8; - *quotient_f = (q << 8) | (r / d); - } -} - -static void sp887x_correct_offsets (struct sp887x_state* state, - struct dtv_frontend_properties *p, - int actual_freq) -{ - static const u32 srate_correction [] = { 1879617, 4544878, 8098561 }; - int bw_index; - int freq_offset = actual_freq - p->frequency; - int sysclock = 61003; //[kHz] - int ifreq = 36000000; - int freq; - int frequency_shift; - - switch (p->bandwidth_hz) { - default: - case 8000000: - bw_index = 0; - break; - case 7000000: - bw_index = 1; - break; - case 6000000: - bw_index = 2; - break; - } - - if (p->inversion == INVERSION_ON) - freq = ifreq - freq_offset; - else - freq = ifreq + freq_offset; - - divide(freq / 333, sysclock, NULL, &frequency_shift); - - if (p->inversion == INVERSION_ON) - frequency_shift = -frequency_shift; - - /* sample rate correction */ - sp887x_writereg(state, 0x319, srate_correction[bw_index] >> 12); - sp887x_writereg(state, 0x31a, srate_correction[bw_index] & 0xfff); - - /* carrier offset correction */ - sp887x_writereg(state, 0x309, frequency_shift >> 12); - sp887x_writereg(state, 0x30a, frequency_shift & 0xfff); -} - -static int sp887x_setup_frontend_parameters(struct dvb_frontend *fe) -{ - struct dtv_frontend_properties *p = &fe->dtv_property_cache; - struct sp887x_state* state = fe->demodulator_priv; - unsigned actual_freq; - int err; - u16 val, reg0xc05; - - if (p->bandwidth_hz != 8000000 && - p->bandwidth_hz != 7000000 && - p->bandwidth_hz != 6000000) - return -EINVAL; - - if ((err = configure_reg0xc05(p, ®0xc05))) - return err; - - sp887x_microcontroller_stop(state); - - /* setup the PLL */ - if (fe->ops.tuner_ops.set_params) { - fe->ops.tuner_ops.set_params(fe); - if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); - } - if (fe->ops.tuner_ops.get_frequency) { - fe->ops.tuner_ops.get_frequency(fe, &actual_freq); - if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); - } else { - actual_freq = p->frequency; - } - - /* read status reg in order to clear <pending irqs */ - sp887x_readreg(state, 0x200); - - sp887x_correct_offsets(state, p, actual_freq); - - /* filter for 6/7/8 Mhz channel */ - if (p->bandwidth_hz == 6000000) - val = 2; - else if (p->bandwidth_hz == 7000000) - val = 1; - else - val = 0; - - sp887x_writereg(state, 0x311, val); - - /* scan order: 2k first = 0, 8k first = 1 */ - if (p->transmission_mode == TRANSMISSION_MODE_2K) - sp887x_writereg(state, 0x338, 0x000); - else - sp887x_writereg(state, 0x338, 0x001); - - sp887x_writereg(state, 0xc05, reg0xc05); - - if (p->bandwidth_hz == 6000000) - val = 2 << 3; - else if (p->bandwidth_hz == 7000000) - val = 3 << 3; - else - val = 0 << 3; - - /* enable OFDM and SAW bits as lock indicators in sync register 0xf17, - * optimize algorithm for given bandwidth... - */ - sp887x_writereg(state, 0xf14, 0x160 | val); - sp887x_writereg(state, 0xf15, 0x000); - - sp887x_microcontroller_start(state); - return 0; -} - -static int sp887x_read_status(struct dvb_frontend* fe, fe_status_t* status) -{ - struct sp887x_state* state = fe->demodulator_priv; - u16 snr12 = sp887x_readreg(state, 0xf16); - u16 sync0x200 = sp887x_readreg(state, 0x200); - u16 sync0xf17 = sp887x_readreg(state, 0xf17); - - *status = 0; - - if (snr12 > 0x00f) - *status |= FE_HAS_SIGNAL; - - //if (sync0x200 & 0x004) - // *status |= FE_HAS_SYNC | FE_HAS_CARRIER; - - //if (sync0x200 & 0x008) - // *status |= FE_HAS_VITERBI; - - if ((sync0xf17 & 0x00f) == 0x002) { - *status |= FE_HAS_LOCK; - *status |= FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_CARRIER; - } - - if (sync0x200 & 0x001) { /* tuner adjustment requested...*/ - int steps = (sync0x200 >> 4) & 0x00f; - if (steps & 0x008) - steps = -steps; - dprintk("sp887x: implement tuner adjustment (%+i steps)!!\n", - steps); - } - - return 0; -} - -static int sp887x_read_ber(struct dvb_frontend* fe, u32* ber) -{ - struct sp887x_state* state = fe->demodulator_priv; - - *ber = (sp887x_readreg(state, 0xc08) & 0x3f) | - (sp887x_readreg(state, 0xc07) << 6); - sp887x_writereg(state, 0xc08, 0x000); - sp887x_writereg(state, 0xc07, 0x000); - if (*ber >= 0x3fff0) - *ber = ~0; - - return 0; -} - -static int sp887x_read_signal_strength(struct dvb_frontend* fe, u16* strength) -{ - struct sp887x_state* state = fe->demodulator_priv; - - u16 snr12 = sp887x_readreg(state, 0xf16); - u32 signal = 3 * (snr12 << 4); - *strength = (signal < 0xffff) ? signal : 0xffff; - - return 0; -} - -static int sp887x_read_snr(struct dvb_frontend* fe, u16* snr) -{ - struct sp887x_state* state = fe->demodulator_priv; - - u16 snr12 = sp887x_readreg(state, 0xf16); - *snr = (snr12 << 4) | (snr12 >> 8); - - return 0; -} - -static int sp887x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) -{ - struct sp887x_state* state = fe->demodulator_priv; - - *ucblocks = sp887x_readreg(state, 0xc0c); - if (*ucblocks == 0xfff) - *ucblocks = ~0; - - return 0; -} - -static int sp887x_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) -{ - struct sp887x_state* state = fe->demodulator_priv; - - if (enable) { - return sp887x_writereg(state, 0x206, 0x001); - } else { - return sp887x_writereg(state, 0x206, 0x000); - } -} - -static int sp887x_sleep(struct dvb_frontend* fe) -{ - struct sp887x_state* state = fe->demodulator_priv; - - /* tristate TS output and disable interface pins */ - sp887x_writereg(state, 0xc18, 0x000); - - return 0; -} - -static int sp887x_init(struct dvb_frontend* fe) -{ - struct sp887x_state* state = fe->demodulator_priv; - const struct firmware *fw = NULL; - int ret; - - if (!state->initialised) { - /* request the firmware, this will block until someone uploads it */ - printk("sp887x: waiting for firmware upload (%s)...\n", SP887X_DEFAULT_FIRMWARE); - ret = state->config->request_firmware(fe, &fw, SP887X_DEFAULT_FIRMWARE); - if (ret) { - printk("sp887x: no firmware upload (timeout or file not found?)\n"); - return ret; - } - - ret = sp887x_initial_setup(fe, fw); - release_firmware(fw); - if (ret) { - printk("sp887x: writing firmware to device failed\n"); - return ret; - } - printk("sp887x: firmware upload complete\n"); - state->initialised = 1; - } - - /* enable TS output and interface pins */ - sp887x_writereg(state, 0xc18, 0x00d); - - return 0; -} - -static int sp887x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings) -{ - fesettings->min_delay_ms = 350; - fesettings->step_size = 166666*2; - fesettings->max_drift = (166666*2)+1; - return 0; -} - -static void sp887x_release(struct dvb_frontend* fe) -{ - struct sp887x_state* state = fe->demodulator_priv; - kfree(state); -} - -static struct dvb_frontend_ops sp887x_ops; - -struct dvb_frontend* sp887x_attach(const struct sp887x_config* config, - struct i2c_adapter* i2c) -{ - struct sp887x_state* state = NULL; - - /* allocate memory for the internal state */ - state = kzalloc(sizeof(struct sp887x_state), GFP_KERNEL); - if (state == NULL) goto error; - - /* setup the state */ - state->config = config; - state->i2c = i2c; - state->initialised = 0; - - /* check if the demod is there */ - if (sp887x_readreg(state, 0x0200) < 0) goto error; - - /* create dvb_frontend */ - memcpy(&state->frontend.ops, &sp887x_ops, sizeof(struct dvb_frontend_ops)); - state->frontend.demodulator_priv = state; - return &state->frontend; - -error: - kfree(state); - return NULL; -} - -static struct dvb_frontend_ops sp887x_ops = { - .delsys = { SYS_DVBT }, - .info = { - .name = "Spase SP887x DVB-T", - .frequency_min = 50500000, - .frequency_max = 858000000, - .frequency_stepsize = 166666, - .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | - FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | - FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | - FE_CAN_RECOVER - }, - - .release = sp887x_release, - - .init = sp887x_init, - .sleep = sp887x_sleep, - .i2c_gate_ctrl = sp887x_i2c_gate_ctrl, - - .set_frontend = sp887x_setup_frontend_parameters, - .get_tune_settings = sp887x_get_tune_settings, - - .read_status = sp887x_read_status, - .read_ber = sp887x_read_ber, - .read_signal_strength = sp887x_read_signal_strength, - .read_snr = sp887x_read_snr, - .read_ucblocks = sp887x_read_ucblocks, -}; - -module_param(debug, int, 0644); -MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); - -MODULE_DESCRIPTION("Spase sp887x DVB-T demodulator driver"); -MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(sp887x_attach); |
