diff options
Diffstat (limited to 'drivers/media/dvb-frontends/itd1000.c')
| -rw-r--r-- | drivers/media/dvb-frontends/itd1000.c | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/itd1000.c b/drivers/media/dvb-frontends/itd1000.c new file mode 100644 index 000000000..f8f362f50 --- /dev/null +++ b/drivers/media/dvb-frontends/itd1000.c @@ -0,0 +1,396 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the Integrant ITD1000 "Zero-IF Tuner IC for Direct Broadcast Satellite" + * + * Copyright (c) 2007-8 Patrick Boettcher <pb@linuxtv.org> + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/delay.h> +#include <linux/dvb/frontend.h> +#include <linux/i2c.h> +#include <linux/slab.h> + +#include <media/dvb_frontend.h> + +#include "itd1000.h" +#include "itd1000_priv.h" + +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + +static int debug; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); + +#define itd_dbg(args...) do { \ + if (debug) { \ + printk(KERN_DEBUG "ITD1000: " args);\ + } \ +} while (0) + +#define itd_warn(args...) do { \ + printk(KERN_WARNING "ITD1000: " args); \ +} while (0) + +#define itd_info(args...) do { \ + printk(KERN_INFO "ITD1000: " args); \ +} while (0) + +/* don't write more than one byte with flexcop behind */ +static int itd1000_write_regs(struct itd1000_state *state, u8 reg, u8 v[], u8 len) +{ + u8 buf[MAX_XFER_SIZE]; + struct i2c_msg msg = { + .addr = state->cfg->i2c_address, .flags = 0, .buf = buf, .len = len+1 + }; + + if (1 + len > sizeof(buf)) { + printk(KERN_WARNING + "itd1000: i2c wr reg=%04x: len=%d is too big!\n", + reg, len); + return -EINVAL; + } + + buf[0] = reg; + memcpy(&buf[1], v, len); + + /* itd_dbg("wr %02x: %02x\n", reg, v[0]); */ + + if (i2c_transfer(state->i2c, &msg, 1) != 1) { + printk(KERN_WARNING "itd1000 I2C write failed\n"); + return -EREMOTEIO; + } + return 0; +} + +static int itd1000_read_reg(struct itd1000_state *state, u8 reg) +{ + u8 val; + struct i2c_msg msg[2] = { + { .addr = state->cfg->i2c_address, .flags = 0, .buf = ®, .len = 1 }, + { .addr = state->cfg->i2c_address, .flags = I2C_M_RD, .buf = &val, .len = 1 }, + }; + + /* ugly flexcop workaround */ + itd1000_write_regs(state, (reg - 1) & 0xff, &state->shadow[(reg - 1) & 0xff], 1); + + if (i2c_transfer(state->i2c, msg, 2) != 2) { + itd_warn("itd1000 I2C read failed\n"); + return -EREMOTEIO; + } + return val; +} + +static inline int itd1000_write_reg(struct itd1000_state *state, u8 r, u8 v) +{ + u8 tmp = v; /* see gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 */ + int ret = itd1000_write_regs(state, r, &tmp, 1); + state->shadow[r] = tmp; + return ret; +} + + +static struct { + u32 symbol_rate; + u8 pgaext : 4; /* PLLFH */ + u8 bbgvmin : 4; /* BBGVMIN */ +} itd1000_lpf_pga[] = { + { 0, 0x8, 0x3 }, + { 5200000, 0x8, 0x3 }, + { 12200000, 0x4, 0x3 }, + { 15400000, 0x2, 0x3 }, + { 19800000, 0x2, 0x3 }, + { 21500000, 0x2, 0x3 }, + { 24500000, 0x2, 0x3 }, + { 28400000, 0x2, 0x3 }, + { 33400000, 0x2, 0x3 }, + { 34400000, 0x1, 0x4 }, + { 34400000, 0x1, 0x4 }, + { 38400000, 0x1, 0x4 }, + { 38400000, 0x1, 0x4 }, + { 40400000, 0x1, 0x4 }, + { 45400000, 0x1, 0x4 }, +}; + +static void itd1000_set_lpf_bw(struct itd1000_state *state, u32 symbol_rate) +{ + u8 i; + u8 con1 = itd1000_read_reg(state, CON1) & 0xfd; + u8 pllfh = itd1000_read_reg(state, PLLFH) & 0x0f; + u8 bbgvmin = itd1000_read_reg(state, BBGVMIN) & 0xf0; + u8 bw = itd1000_read_reg(state, BW) & 0xf0; + + itd_dbg("symbol_rate = %d\n", symbol_rate); + + /* not sure what is that ? - starting to download the table */ + itd1000_write_reg(state, CON1, con1 | (1 << 1)); + + for (i = 0; i < ARRAY_SIZE(itd1000_lpf_pga); i++) + if (symbol_rate < itd1000_lpf_pga[i].symbol_rate) { + itd_dbg("symrate: index: %d pgaext: %x, bbgvmin: %x\n", i, itd1000_lpf_pga[i].pgaext, itd1000_lpf_pga[i].bbgvmin); + itd1000_write_reg(state, PLLFH, pllfh | (itd1000_lpf_pga[i].pgaext << 4)); + itd1000_write_reg(state, BBGVMIN, bbgvmin | (itd1000_lpf_pga[i].bbgvmin)); + itd1000_write_reg(state, BW, bw | (i & 0x0f)); + break; + } + + itd1000_write_reg(state, CON1, con1 | (0 << 1)); +} + +static struct { + u8 vcorg; + u32 fmax_rg; +} itd1000_vcorg[] = { + { 1, 920000 }, + { 2, 971000 }, + { 3, 1031000 }, + { 4, 1091000 }, + { 5, 1171000 }, + { 6, 1281000 }, + { 7, 1381000 }, + { 8, 500000 }, /* this is intentional. */ + { 9, 1451000 }, + { 10, 1531000 }, + { 11, 1631000 }, + { 12, 1741000 }, + { 13, 1891000 }, + { 14, 2071000 }, + { 15, 2250000 }, +}; + +static void itd1000_set_vco(struct itd1000_state *state, u32 freq_khz) +{ + u8 i; + u8 gvbb_i2c = itd1000_read_reg(state, GVBB_I2C) & 0xbf; + u8 vco_chp1_i2c = itd1000_read_reg(state, VCO_CHP1_I2C) & 0x0f; + u8 adcout; + + /* reserved bit again (reset ?) */ + itd1000_write_reg(state, GVBB_I2C, gvbb_i2c | (1 << 6)); + + for (i = 0; i < ARRAY_SIZE(itd1000_vcorg); i++) { + if (freq_khz < itd1000_vcorg[i].fmax_rg) { + itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | (itd1000_vcorg[i].vcorg << 4)); + msleep(1); + + adcout = itd1000_read_reg(state, PLLLOCK) & 0x0f; + + itd_dbg("VCO: %dkHz: %d -> ADCOUT: %d %02x\n", freq_khz, itd1000_vcorg[i].vcorg, adcout, vco_chp1_i2c); + + if (adcout > 13) { + if (!(itd1000_vcorg[i].vcorg == 7 || itd1000_vcorg[i].vcorg == 15)) + itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg + 1) << 4)); + } else if (adcout < 2) { + if (!(itd1000_vcorg[i].vcorg == 1 || itd1000_vcorg[i].vcorg == 9)) + itd1000_write_reg(state, VCO_CHP1_I2C, vco_chp1_i2c | ((itd1000_vcorg[i].vcorg - 1) << 4)); + } + break; + } + } +} + +static const struct { + u32 freq; + u8 values[10]; /* RFTR, RFST1 - RFST9 */ +} itd1000_fre_values[] = { + { 1075000, { 0x59, 0x1d, 0x1c, 0x17, 0x16, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, + { 1250000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, + { 1450000, { 0x89, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, + { 1650000, { 0x69, 0x1e, 0x1d, 0x17, 0x15, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, + { 1750000, { 0x69, 0x1e, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0c, 0x0b, 0x0a } }, + { 1850000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } }, + { 1900000, { 0x69, 0x1d, 0x17, 0x15, 0x14, 0x0f, 0x0e, 0x0d, 0x0b, 0x0a } }, + { 1950000, { 0x69, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0d, 0x0b, 0x0a } }, + { 2050000, { 0x69, 0x1e, 0x1d, 0x17, 0x16, 0x14, 0x13, 0x0e, 0x0b, 0x0a } }, + { 2150000, { 0x69, 0x1d, 0x1c, 0x17, 0x15, 0x14, 0x13, 0x0f, 0x0e, 0x0b } } +}; + + +#define FREF 16 + +static void itd1000_set_lo(struct itd1000_state *state, u32 freq_khz) +{ + int i, j; + u32 plln, pllf; + u64 tmp; + + plln = (freq_khz * 1000) / 2 / FREF; + + /* Compute the factional part times 1000 */ + tmp = plln % 1000000; + plln /= 1000000; + + tmp *= 1048576; + do_div(tmp, 1000000); + pllf = (u32) tmp; + + state->frequency = ((plln * 1000) + (pllf * 1000)/1048576) * 2*FREF; + itd_dbg("frequency: %dkHz (wanted) %dkHz (set), PLLF = %d, PLLN = %d\n", freq_khz, state->frequency, pllf, plln); + + itd1000_write_reg(state, PLLNH, 0x80); /* PLLNH */ + itd1000_write_reg(state, PLLNL, plln & 0xff); + itd1000_write_reg(state, PLLFH, (itd1000_read_reg(state, PLLFH) & 0xf0) | ((pllf >> 16) & 0x0f)); + itd1000_write_reg(state, PLLFM, (pllf >> 8) & 0xff); + itd1000_write_reg(state, PLLFL, (pllf >> 0) & 0xff); + + for (i = 0; i < ARRAY_SIZE(itd1000_fre_values); i++) { + if (freq_khz <= itd1000_fre_values[i].freq) { + itd_dbg("fre_values: %d\n", i); + itd1000_write_reg(state, RFTR, itd1000_fre_values[i].values[0]); + for (j = 0; j < 9; j++) + itd1000_write_reg(state, RFST1+j, itd1000_fre_values[i].values[j+1]); + break; + } + } + + itd1000_set_vco(state, freq_khz); +} + +static int itd1000_set_parameters(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + struct itd1000_state *state = fe->tuner_priv; + u8 pllcon1; + + itd1000_set_lo(state, c->frequency); + itd1000_set_lpf_bw(state, c->symbol_rate); + + pllcon1 = itd1000_read_reg(state, PLLCON1) & 0x7f; + itd1000_write_reg(state, PLLCON1, pllcon1 | (1 << 7)); + itd1000_write_reg(state, PLLCON1, pllcon1); + + return 0; +} + +static int itd1000_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + struct itd1000_state *state = fe->tuner_priv; + *frequency = state->frequency; + return 0; +} + +static int itd1000_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) +{ + return 0; +} + +static u8 itd1000_init_tab[][2] = { + { PLLCON1, 0x65 }, /* Register does not change */ + { PLLNH, 0x80 }, /* Bits [7:6] do not change */ + { RESERVED_0X6D, 0x3b }, + { VCO_CHP2_I2C, 0x12 }, + { 0x72, 0xf9 }, /* No such regsister defined */ + { RESERVED_0X73, 0xff }, + { RESERVED_0X74, 0xb2 }, + { RESERVED_0X75, 0xc7 }, + { EXTGVBBRF, 0xf0 }, + { DIVAGCCK, 0x80 }, + { BBTR, 0xa0 }, + { RESERVED_0X7E, 0x4f }, + { 0x82, 0x88 }, /* No such regsister defined */ + { 0x83, 0x80 }, /* No such regsister defined */ + { 0x84, 0x80 }, /* No such regsister defined */ + { RESERVED_0X85, 0x74 }, + { RESERVED_0X86, 0xff }, + { RESERVED_0X88, 0x02 }, + { RESERVED_0X89, 0x16 }, + { RFST0, 0x1f }, + { RESERVED_0X94, 0x66 }, + { RESERVED_0X95, 0x66 }, + { RESERVED_0X96, 0x77 }, + { RESERVED_0X97, 0x99 }, + { RESERVED_0X98, 0xff }, + { RESERVED_0X99, 0xfc }, + { RESERVED_0X9A, 0xba }, + { RESERVED_0X9B, 0xaa }, +}; + +static u8 itd1000_reinit_tab[][2] = { + { VCO_CHP1_I2C, 0x8a }, + { BW, 0x87 }, + { GVBB_I2C, 0x03 }, + { BBGVMIN, 0x03 }, + { CON1, 0x2e }, +}; + + +static int itd1000_init(struct dvb_frontend *fe) +{ + struct itd1000_state *state = fe->tuner_priv; + int i; + + for (i = 0; i < ARRAY_SIZE(itd1000_init_tab); i++) + itd1000_write_reg(state, itd1000_init_tab[i][0], itd1000_init_tab[i][1]); + + for (i = 0; i < ARRAY_SIZE(itd1000_reinit_tab); i++) + itd1000_write_reg(state, itd1000_reinit_tab[i][0], itd1000_reinit_tab[i][1]); + + return 0; +} + +static int itd1000_sleep(struct dvb_frontend *fe) +{ + return 0; +} + +static void itd1000_release(struct dvb_frontend *fe) +{ + kfree(fe->tuner_priv); + fe->tuner_priv = NULL; +} + +static const struct dvb_tuner_ops itd1000_tuner_ops = { + .info = { + .name = "Integrant ITD1000", + .frequency_min_hz = 950 * MHz, + .frequency_max_hz = 2150 * MHz, + .frequency_step_hz = 125 * kHz, + }, + + .release = itd1000_release, + + .init = itd1000_init, + .sleep = itd1000_sleep, + + .set_params = itd1000_set_parameters, + .get_frequency = itd1000_get_frequency, + .get_bandwidth = itd1000_get_bandwidth +}; + + +struct dvb_frontend *itd1000_attach(struct dvb_frontend *fe, struct i2c_adapter *i2c, struct itd1000_config *cfg) +{ + struct itd1000_state *state = NULL; + u8 i = 0; + + state = kzalloc(sizeof(struct itd1000_state), GFP_KERNEL); + if (state == NULL) + return NULL; + + state->cfg = cfg; + state->i2c = i2c; + + i = itd1000_read_reg(state, 0); + if (i != 0) { + kfree(state); + return NULL; + } + itd_info("successfully identified (ID: %d)\n", i); + + memset(state->shadow, 0xff, sizeof(state->shadow)); + for (i = 0x65; i < 0x9c; i++) + state->shadow[i] = itd1000_read_reg(state, i); + + memcpy(&fe->ops.tuner_ops, &itd1000_tuner_ops, sizeof(struct dvb_tuner_ops)); + + fe->tuner_priv = state; + + return fe; +} +EXPORT_SYMBOL_GPL(itd1000_attach); + +MODULE_AUTHOR("Patrick Boettcher <pb@linuxtv.org>"); +MODULE_DESCRIPTION("Integrant ITD1000 driver"); +MODULE_LICENSE("GPL"); |