diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/dvb-frontends/s921.c | 535 |
1 files changed, 535 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/s921.c b/drivers/media/dvb-frontends/s921.c new file mode 100644 index 000000000..7e461ac15 --- /dev/null +++ b/drivers/media/dvb-frontends/s921.c @@ -0,0 +1,535 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Sharp VA3A5JZ921 One Seg Broadcast Module driver + * This device is labeled as just S. 921 at the top of the frontend can + * + * Copyright (C) 2009-2010 Mauro Carvalho Chehab + * Copyright (C) 2009-2010 Douglas Landgraf <dougsland@redhat.com> + * + * Developed for Leadership SBTVD 1seg device sold in Brazil + * + * Frontend module based on cx24123 driver, getting some info from + * the old s921 driver. + * + * FIXME: Need to port to DVB v5.2 API + */ + +#include <linux/kernel.h> +#include <asm/div64.h> + +#include <media/dvb_frontend.h> +#include "s921.h" + +static int debug = 1; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Activates frontend debugging (default:0)"); + +#define rc(args...) do { \ + printk(KERN_ERR "s921: " args); \ +} while (0) + +#define dprintk(args...) \ + do { \ + if (debug) { \ + printk(KERN_DEBUG "s921: %s: ", __func__); \ + printk(args); \ + } \ + } while (0) + +struct s921_state { + struct i2c_adapter *i2c; + const struct s921_config *config; + + struct dvb_frontend frontend; + + /* The Demod can't easily provide these, we cache them */ + u32 currentfreq; +}; + +/* + * Various tuner defaults need to be established for a given frequency kHz. + * fixme: The bounds on the bands do not match the doc in real life. + * fixme: Some of them have been moved, other might need adjustment. + */ +static struct s921_bandselect_val { + u32 freq_low; + u8 band_reg; +} s921_bandselect[] = { + { 0, 0x7b }, + { 485140000, 0x5b }, + { 515140000, 0x3b }, + { 545140000, 0x1b }, + { 599140000, 0xfb }, + { 623140000, 0xdb }, + { 659140000, 0xbb }, + { 713140000, 0x9b }, +}; + +struct regdata { + u8 reg; + u8 data; +}; + +static struct regdata s921_init[] = { + { 0x01, 0x80 }, /* Probably, a reset sequence */ + { 0x01, 0x40 }, + { 0x01, 0x80 }, + { 0x01, 0x40 }, + + { 0x02, 0x00 }, + { 0x03, 0x40 }, + { 0x04, 0x01 }, + { 0x05, 0x00 }, + { 0x06, 0x00 }, + { 0x07, 0x00 }, + { 0x08, 0x00 }, + { 0x09, 0x00 }, + { 0x0a, 0x00 }, + { 0x0b, 0x5a }, + { 0x0c, 0x00 }, + { 0x0d, 0x00 }, + { 0x0f, 0x00 }, + { 0x13, 0x1b }, + { 0x14, 0x80 }, + { 0x15, 0x40 }, + { 0x17, 0x70 }, + { 0x18, 0x01 }, + { 0x19, 0x12 }, + { 0x1a, 0x01 }, + { 0x1b, 0x12 }, + { 0x1c, 0xa0 }, + { 0x1d, 0x00 }, + { 0x1e, 0x0a }, + { 0x1f, 0x08 }, + { 0x20, 0x40 }, + { 0x21, 0xff }, + { 0x22, 0x4c }, + { 0x23, 0x4e }, + { 0x24, 0x4c }, + { 0x25, 0x00 }, + { 0x26, 0x00 }, + { 0x27, 0xf4 }, + { 0x28, 0x60 }, + { 0x29, 0x88 }, + { 0x2a, 0x40 }, + { 0x2b, 0x40 }, + { 0x2c, 0xff }, + { 0x2d, 0x00 }, + { 0x2e, 0xff }, + { 0x2f, 0x00 }, + { 0x30, 0x20 }, + { 0x31, 0x06 }, + { 0x32, 0x0c }, + { 0x34, 0x0f }, + { 0x37, 0xfe }, + { 0x38, 0x00 }, + { 0x39, 0x63 }, + { 0x3a, 0x10 }, + { 0x3b, 0x10 }, + { 0x47, 0x00 }, + { 0x49, 0xe5 }, + { 0x4b, 0x00 }, + { 0x50, 0xc0 }, + { 0x52, 0x20 }, + { 0x54, 0x5a }, + { 0x55, 0x5b }, + { 0x56, 0x40 }, + { 0x57, 0x70 }, + { 0x5c, 0x50 }, + { 0x5d, 0x00 }, + { 0x62, 0x17 }, + { 0x63, 0x2f }, + { 0x64, 0x6f }, + { 0x68, 0x00 }, + { 0x69, 0x89 }, + { 0x6a, 0x00 }, + { 0x6b, 0x00 }, + { 0x6c, 0x00 }, + { 0x6d, 0x00 }, + { 0x6e, 0x00 }, + { 0x70, 0x10 }, + { 0x71, 0x00 }, + { 0x75, 0x00 }, + { 0x76, 0x30 }, + { 0x77, 0x01 }, + { 0xaf, 0x00 }, + { 0xb0, 0xa0 }, + { 0xb2, 0x3d }, + { 0xb3, 0x25 }, + { 0xb4, 0x8b }, + { 0xb5, 0x4b }, + { 0xb6, 0x3f }, + { 0xb7, 0xff }, + { 0xb8, 0xff }, + { 0xb9, 0xfc }, + { 0xba, 0x00 }, + { 0xbb, 0x00 }, + { 0xbc, 0x00 }, + { 0xd0, 0x30 }, + { 0xe4, 0x84 }, + { 0xf0, 0x48 }, + { 0xf1, 0x19 }, + { 0xf2, 0x5a }, + { 0xf3, 0x8e }, + { 0xf4, 0x2d }, + { 0xf5, 0x07 }, + { 0xf6, 0x5a }, + { 0xf7, 0xba }, + { 0xf8, 0xd7 }, +}; + +static struct regdata s921_prefreq[] = { + { 0x47, 0x60 }, + { 0x68, 0x00 }, + { 0x69, 0x89 }, + { 0xf0, 0x48 }, + { 0xf1, 0x19 }, +}; + +static struct regdata s921_postfreq[] = { + { 0xf5, 0xae }, + { 0xf6, 0xb7 }, + { 0xf7, 0xba }, + { 0xf8, 0xd7 }, + { 0x68, 0x0a }, + { 0x69, 0x09 }, +}; + +static int s921_i2c_writereg(struct s921_state *state, + u8 i2c_addr, int reg, int data) +{ + u8 buf[] = { reg, data }; + struct i2c_msg msg = { + .addr = i2c_addr, .flags = 0, .buf = buf, .len = 2 + }; + int rc; + + rc = i2c_transfer(state->i2c, &msg, 1); + if (rc != 1) { + printk("%s: writereg rcor(rc == %i, reg == 0x%02x, data == 0x%02x)\n", + __func__, rc, reg, data); + return rc; + } + + return 0; +} + +static int s921_i2c_writeregdata(struct s921_state *state, u8 i2c_addr, + struct regdata *rd, int size) +{ + int i, rc; + + for (i = 0; i < size; i++) { + rc = s921_i2c_writereg(state, i2c_addr, rd[i].reg, rd[i].data); + if (rc < 0) + return rc; + } + return 0; +} + +static int s921_i2c_readreg(struct s921_state *state, u8 i2c_addr, u8 reg) +{ + u8 val; + int rc; + struct i2c_msg msg[] = { + { .addr = i2c_addr, .flags = 0, .buf = ®, .len = 1 }, + { .addr = i2c_addr, .flags = I2C_M_RD, .buf = &val, .len = 1 } + }; + + rc = i2c_transfer(state->i2c, msg, 2); + + if (rc != 2) { + rc("%s: reg=0x%x (rcor=%d)\n", __func__, reg, rc); + return rc; + } + + return val; +} + +#define s921_readreg(state, reg) \ + s921_i2c_readreg(state, state->config->demod_address, reg) +#define s921_writereg(state, reg, val) \ + s921_i2c_writereg(state, state->config->demod_address, reg, val) +#define s921_writeregdata(state, regdata) \ + s921_i2c_writeregdata(state, state->config->demod_address, \ + regdata, ARRAY_SIZE(regdata)) + +static int s921_pll_tune(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct s921_state *state = fe->demodulator_priv; + int band, rc, i; + unsigned long f_offset; + u8 f_switch; + u64 offset; + + dprintk("frequency=%i\n", p->frequency); + + for (band = 0; band < ARRAY_SIZE(s921_bandselect); band++) + if (p->frequency < s921_bandselect[band].freq_low) + break; + band--; + + if (band < 0) { + rc("%s: frequency out of range\n", __func__); + return -EINVAL; + } + + f_switch = s921_bandselect[band].band_reg; + + offset = ((u64)p->frequency) * 258; + do_div(offset, 6000000); + f_offset = ((unsigned long)offset) + 2321; + + rc = s921_writeregdata(state, s921_prefreq); + if (rc < 0) + return rc; + + rc = s921_writereg(state, 0xf2, (f_offset >> 8) & 0xff); + if (rc < 0) + return rc; + + rc = s921_writereg(state, 0xf3, f_offset & 0xff); + if (rc < 0) + return rc; + + rc = s921_writereg(state, 0xf4, f_switch); + if (rc < 0) + return rc; + + rc = s921_writeregdata(state, s921_postfreq); + if (rc < 0) + return rc; + + for (i = 0 ; i < 6; i++) { + rc = s921_readreg(state, 0x80); + dprintk("status 0x80: %02x\n", rc); + } + rc = s921_writereg(state, 0x01, 0x40); + if (rc < 0) + return rc; + + rc = s921_readreg(state, 0x01); + dprintk("status 0x01: %02x\n", rc); + + rc = s921_readreg(state, 0x80); + dprintk("status 0x80: %02x\n", rc); + + rc = s921_readreg(state, 0x80); + dprintk("status 0x80: %02x\n", rc); + + rc = s921_readreg(state, 0x32); + dprintk("status 0x32: %02x\n", rc); + + dprintk("pll tune band=%d, pll=%d\n", f_switch, (int)f_offset); + + return 0; +} + +static int s921_initfe(struct dvb_frontend *fe) +{ + struct s921_state *state = fe->demodulator_priv; + int rc; + + dprintk("\n"); + + rc = s921_writeregdata(state, s921_init); + if (rc < 0) + return rc; + + return 0; +} + +static int s921_read_status(struct dvb_frontend *fe, enum fe_status *status) +{ + struct s921_state *state = fe->demodulator_priv; + int regstatus, rc; + + *status = 0; + + rc = s921_readreg(state, 0x81); + if (rc < 0) + return rc; + + regstatus = rc << 8; + + rc = s921_readreg(state, 0x82); + if (rc < 0) + return rc; + + regstatus |= rc; + + dprintk("status = %04x\n", regstatus); + + /* Full Sync - We don't know what each bit means on regs 0x81/0x82 */ + if ((regstatus & 0xff) == 0x40) { + *status = FE_HAS_SIGNAL | + FE_HAS_CARRIER | + FE_HAS_VITERBI | + FE_HAS_SYNC | + FE_HAS_LOCK; + } else if (regstatus & 0x40) { + /* This is close to Full Sync, but not enough to get useful info */ + *status = FE_HAS_SIGNAL | + FE_HAS_CARRIER | + FE_HAS_VITERBI | + FE_HAS_SYNC; + } + + return 0; +} + +static int s921_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + enum fe_status status; + struct s921_state *state = fe->demodulator_priv; + int rc; + + /* FIXME: Use the proper register for it... 0x80? */ + rc = s921_read_status(fe, &status); + if (rc < 0) + return rc; + + *strength = (status & FE_HAS_LOCK) ? 0xffff : 0; + + dprintk("strength = 0x%04x\n", *strength); + + rc = s921_readreg(state, 0x01); + dprintk("status 0x01: %02x\n", rc); + + rc = s921_readreg(state, 0x80); + dprintk("status 0x80: %02x\n", rc); + + rc = s921_readreg(state, 0x32); + dprintk("status 0x32: %02x\n", rc); + + return 0; +} + +static int s921_set_frontend(struct dvb_frontend *fe) +{ + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + struct s921_state *state = fe->demodulator_priv; + int rc; + + dprintk("\n"); + + /* FIXME: We don't know how to use non-auto mode */ + + rc = s921_pll_tune(fe); + if (rc < 0) + return rc; + + state->currentfreq = p->frequency; + + return 0; +} + +static int s921_get_frontend(struct dvb_frontend *fe, + struct dtv_frontend_properties *p) +{ + struct s921_state *state = fe->demodulator_priv; + + /* FIXME: Probably it is possible to get it from regs f1 and f2 */ + p->frequency = state->currentfreq; + p->delivery_system = SYS_ISDBT; + + return 0; +} + +static int s921_tune(struct dvb_frontend *fe, + bool re_tune, + unsigned int mode_flags, + unsigned int *delay, + enum fe_status *status) +{ + int rc = 0; + + dprintk("\n"); + + if (re_tune) + rc = s921_set_frontend(fe); + + if (!(mode_flags & FE_TUNE_MODE_ONESHOT)) + s921_read_status(fe, status); + + return rc; +} + +static enum dvbfe_algo s921_get_algo(struct dvb_frontend *fe) +{ + return DVBFE_ALGO_HW; +} + +static void s921_release(struct dvb_frontend *fe) +{ + struct s921_state *state = fe->demodulator_priv; + + dprintk("\n"); + kfree(state); +} + +static const struct dvb_frontend_ops s921_ops; + +struct dvb_frontend *s921_attach(const struct s921_config *config, + struct i2c_adapter *i2c) +{ + /* allocate memory for the internal state */ + struct s921_state *state = + kzalloc(sizeof(struct s921_state), GFP_KERNEL); + + dprintk("\n"); + if (!state) { + rc("Unable to kzalloc\n"); + return NULL; + } + + /* setup the state */ + state->config = config; + state->i2c = i2c; + + /* create dvb_frontend */ + memcpy(&state->frontend.ops, &s921_ops, + sizeof(struct dvb_frontend_ops)); + state->frontend.demodulator_priv = state; + + return &state->frontend; +} +EXPORT_SYMBOL_GPL(s921_attach); + +static const struct dvb_frontend_ops s921_ops = { + .delsys = { SYS_ISDBT }, + /* Use dib8000 values per default */ + .info = { + .name = "Sharp S921", + .frequency_min_hz = 470 * MHz, + /* + * Max should be 770MHz instead, according with Sharp docs, + * but Leadership doc says it works up to 806 MHz. This is + * required to get channel 69, used in Brazil + */ + .frequency_max_hz = 806 * MHz, + .caps = FE_CAN_INVERSION_AUTO | + 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_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO | + FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER | + FE_CAN_HIERARCHY_AUTO, + }, + + .release = s921_release, + + .init = s921_initfe, + .set_frontend = s921_set_frontend, + .get_frontend = s921_get_frontend, + .read_status = s921_read_status, + .read_signal_strength = s921_read_signal_strength, + .tune = s921_tune, + .get_frontend_algo = s921_get_algo, +}; + +MODULE_DESCRIPTION("DVB Frontend module for Sharp S921 hardware"); +MODULE_AUTHOR("Mauro Carvalho Chehab"); +MODULE_AUTHOR("Douglas Landgraf <dougsland@redhat.com>"); +MODULE_LICENSE("GPL"); |