diff options
Diffstat (limited to 'kernel/drivers/media/dvb-frontends/stb6100.c')
| -rw-r--r-- | kernel/drivers/media/dvb-frontends/stb6100.c | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/kernel/drivers/media/dvb-frontends/stb6100.c b/kernel/drivers/media/dvb-frontends/stb6100.c new file mode 100644 index 000000000..4ef8a5c70 --- /dev/null +++ b/kernel/drivers/media/dvb-frontends/stb6100.c @@ -0,0 +1,616 @@ +/* + STB6100 Silicon Tuner + Copyright (C) Manu Abraham (abraham.manu@gmail.com) + + Copyright (C) ST Microelectronics + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/string.h> + +#include "dvb_frontend.h" +#include "stb6100.h" + +static unsigned int verbose; +module_param(verbose, int, 0644); + +/* Max transfer size done by I2C transfer functions */ +#define MAX_XFER_SIZE 64 + +#define FE_ERROR 0 +#define FE_NOTICE 1 +#define FE_INFO 2 +#define FE_DEBUG 3 + +#define dprintk(x, y, z, format, arg...) do { \ + if (z) { \ + if ((x > FE_ERROR) && (x > y)) \ + printk(KERN_ERR "%s: " format "\n", __func__ , ##arg); \ + else if ((x > FE_NOTICE) && (x > y)) \ + printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg); \ + else if ((x > FE_INFO) && (x > y)) \ + printk(KERN_INFO "%s: " format "\n", __func__ , ##arg); \ + else if ((x > FE_DEBUG) && (x > y)) \ + printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg); \ + } else { \ + if (x > y) \ + printk(format, ##arg); \ + } \ +} while (0) + +struct stb6100_lkup { + u32 val_low; + u32 val_high; + u8 reg; +}; + +static int stb6100_release(struct dvb_frontend *fe); + +static const struct stb6100_lkup lkup[] = { + { 0, 950000, 0x0a }, + { 950000, 1000000, 0x0a }, + { 1000000, 1075000, 0x0c }, + { 1075000, 1200000, 0x00 }, + { 1200000, 1300000, 0x01 }, + { 1300000, 1370000, 0x02 }, + { 1370000, 1470000, 0x04 }, + { 1470000, 1530000, 0x05 }, + { 1530000, 1650000, 0x06 }, + { 1650000, 1800000, 0x08 }, + { 1800000, 1950000, 0x0a }, + { 1950000, 2150000, 0x0c }, + { 2150000, 9999999, 0x0c }, + { 0, 0, 0x00 } +}; + +/* Register names for easy debugging. */ +static const char *stb6100_regnames[] = { + [STB6100_LD] = "LD", + [STB6100_VCO] = "VCO", + [STB6100_NI] = "NI", + [STB6100_NF_LSB] = "NF", + [STB6100_K] = "K", + [STB6100_G] = "G", + [STB6100_F] = "F", + [STB6100_DLB] = "DLB", + [STB6100_TEST1] = "TEST1", + [STB6100_FCCK] = "FCCK", + [STB6100_LPEN] = "LPEN", + [STB6100_TEST3] = "TEST3", +}; + +/* Template for normalisation, i.e. setting unused or undocumented + * bits as required according to the documentation. + */ +struct stb6100_regmask { + u8 mask; + u8 set; +}; + +static const struct stb6100_regmask stb6100_template[] = { + [STB6100_LD] = { 0xff, 0x00 }, + [STB6100_VCO] = { 0xff, 0x00 }, + [STB6100_NI] = { 0xff, 0x00 }, + [STB6100_NF_LSB] = { 0xff, 0x00 }, + [STB6100_K] = { 0xc7, 0x38 }, + [STB6100_G] = { 0xef, 0x10 }, + [STB6100_F] = { 0x1f, 0xc0 }, + [STB6100_DLB] = { 0x38, 0xc4 }, + [STB6100_TEST1] = { 0x00, 0x8f }, + [STB6100_FCCK] = { 0x40, 0x0d }, + [STB6100_LPEN] = { 0xf0, 0x0b }, + [STB6100_TEST3] = { 0x00, 0xde }, +}; + +/* + * Currently unused. Some boards might need it in the future + */ +static inline void stb6100_normalise_regs(u8 regs[]) +{ + int i; + + for (i = 0; i < STB6100_NUMREGS; i++) + regs[i] = (regs[i] & stb6100_template[i].mask) | stb6100_template[i].set; +} + +static int stb6100_read_regs(struct stb6100_state *state, u8 regs[]) +{ + int rc; + struct i2c_msg msg = { + .addr = state->config->tuner_address, + .flags = I2C_M_RD, + .buf = regs, + .len = STB6100_NUMREGS + }; + + rc = i2c_transfer(state->i2c, &msg, 1); + if (unlikely(rc != 1)) { + dprintk(verbose, FE_ERROR, 1, "Read (0x%x) err, rc=[%d]", + state->config->tuner_address, rc); + + return -EREMOTEIO; + } + if (unlikely(verbose > FE_DEBUG)) { + int i; + + dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address); + for (i = 0; i < STB6100_NUMREGS; i++) + dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[i], regs[i]); + } + return 0; +} + +static int stb6100_read_reg(struct stb6100_state *state, u8 reg) +{ + u8 regs[STB6100_NUMREGS]; + + struct i2c_msg msg = { + .addr = state->config->tuner_address + reg, + .flags = I2C_M_RD, + .buf = regs, + .len = 1 + }; + + i2c_transfer(state->i2c, &msg, 1); + + if (unlikely(reg >= STB6100_NUMREGS)) { + dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg); + return -EINVAL; + } + if (unlikely(verbose > FE_DEBUG)) { + dprintk(verbose, FE_DEBUG, 1, " Read from 0x%02x", state->config->tuner_address); + dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[reg], regs[0]); + } + + return (unsigned int)regs[0]; +} + +static int stb6100_write_reg_range(struct stb6100_state *state, u8 buf[], int start, int len) +{ + int rc; + u8 cmdbuf[MAX_XFER_SIZE]; + struct i2c_msg msg = { + .addr = state->config->tuner_address, + .flags = 0, + .buf = cmdbuf, + .len = len + 1 + }; + + if (1 + len > sizeof(cmdbuf)) { + printk(KERN_WARNING + "%s: i2c wr: len=%d is too big!\n", + KBUILD_MODNAME, len); + return -EINVAL; + } + + if (unlikely(start < 1 || start + len > STB6100_NUMREGS)) { + dprintk(verbose, FE_ERROR, 1, "Invalid register range %d:%d", + start, len); + return -EINVAL; + } + memcpy(&cmdbuf[1], buf, len); + cmdbuf[0] = start; + + if (unlikely(verbose > FE_DEBUG)) { + int i; + + dprintk(verbose, FE_DEBUG, 1, " Write @ 0x%02x: [%d:%d]", state->config->tuner_address, start, len); + for (i = 0; i < len; i++) + dprintk(verbose, FE_DEBUG, 1, " %s: 0x%02x", stb6100_regnames[start + i], buf[i]); + } + rc = i2c_transfer(state->i2c, &msg, 1); + if (unlikely(rc != 1)) { + dprintk(verbose, FE_ERROR, 1, "(0x%x) write err [%d:%d], rc=[%d]", + (unsigned int)state->config->tuner_address, start, len, rc); + return -EREMOTEIO; + } + return 0; +} + +static int stb6100_write_reg(struct stb6100_state *state, u8 reg, u8 data) +{ + if (unlikely(reg >= STB6100_NUMREGS)) { + dprintk(verbose, FE_ERROR, 1, "Invalid register offset 0x%x", reg); + return -EREMOTEIO; + } + data = (data & stb6100_template[reg].mask) | stb6100_template[reg].set; + return stb6100_write_reg_range(state, &data, reg, 1); +} + + +static int stb6100_get_status(struct dvb_frontend *fe, u32 *status) +{ + int rc; + struct stb6100_state *state = fe->tuner_priv; + + rc = stb6100_read_reg(state, STB6100_LD); + if (rc < 0) { + dprintk(verbose, FE_ERROR, 1, "%s failed", __func__); + return rc; + } + return (rc & STB6100_LD_LOCK) ? TUNER_STATUS_LOCKED : 0; +} + +static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) +{ + int rc; + u8 f; + struct stb6100_state *state = fe->tuner_priv; + + rc = stb6100_read_reg(state, STB6100_F); + if (rc < 0) + return rc; + f = rc & STB6100_F_F; + + state->status.bandwidth = (f + 5) * 2000; /* x2 for ZIF */ + + *bandwidth = state->bandwidth = state->status.bandwidth * 1000; + dprintk(verbose, FE_DEBUG, 1, "bandwidth = %u Hz", state->bandwidth); + return 0; +} + +static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth) +{ + u32 tmp; + int rc; + struct stb6100_state *state = fe->tuner_priv; + + dprintk(verbose, FE_DEBUG, 1, "set bandwidth to %u Hz", bandwidth); + + bandwidth /= 2; /* ZIF */ + + if (bandwidth >= 36000000) /* F[4:0] BW/2 max =31+5=36 mhz for F=31 */ + tmp = 31; + else if (bandwidth <= 5000000) /* bw/2 min = 5Mhz for F=0 */ + tmp = 0; + else /* if 5 < bw/2 < 36 */ + tmp = (bandwidth + 500000) / 1000000 - 5; + + /* Turn on LPF bandwidth setting clock control, + * set bandwidth, wait 10ms, turn off. + */ + rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d | STB6100_FCCK_FCCK); + if (rc < 0) + return rc; + rc = stb6100_write_reg(state, STB6100_F, 0xc0 | tmp); + if (rc < 0) + return rc; + + msleep(5); /* This is dangerous as another (related) thread may start */ + + rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d); + if (rc < 0) + return rc; + + msleep(10); /* This is dangerous as another (related) thread may start */ + + return 0; +} + +static int stb6100_get_frequency(struct dvb_frontend *fe, u32 *frequency) +{ + int rc; + u32 nint, nfrac, fvco; + int psd2, odiv; + struct stb6100_state *state = fe->tuner_priv; + u8 regs[STB6100_NUMREGS]; + + rc = stb6100_read_regs(state, regs); + if (rc < 0) + return rc; + + odiv = (regs[STB6100_VCO] & STB6100_VCO_ODIV) >> STB6100_VCO_ODIV_SHIFT; + psd2 = (regs[STB6100_K] & STB6100_K_PSD2) >> STB6100_K_PSD2_SHIFT; + nint = regs[STB6100_NI]; + nfrac = ((regs[STB6100_K] & STB6100_K_NF_MSB) << 8) | regs[STB6100_NF_LSB]; + fvco = (nfrac * state->reference >> (9 - psd2)) + (nint * state->reference << psd2); + *frequency = state->frequency = fvco >> (odiv + 1); + + dprintk(verbose, FE_DEBUG, 1, + "frequency = %u kHz, odiv = %u, psd2 = %u, fxtal = %u kHz, fvco = %u kHz, N(I) = %u, N(F) = %u", + state->frequency, odiv, psd2, state->reference, fvco, nint, nfrac); + return 0; +} + + +static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency) +{ + int rc; + const struct stb6100_lkup *ptr; + struct stb6100_state *state = fe->tuner_priv; + struct dtv_frontend_properties *p = &fe->dtv_property_cache; + + u32 srate = 0, fvco, nint, nfrac; + u8 regs[STB6100_NUMREGS]; + u8 g, psd2, odiv; + + dprintk(verbose, FE_DEBUG, 1, "Version 2010-8-14 13:51"); + + if (fe->ops.get_frontend) { + dprintk(verbose, FE_DEBUG, 1, "Get frontend parameters"); + fe->ops.get_frontend(fe); + } + srate = p->symbol_rate; + + /* Set up tuner cleanly, LPF calibration on */ + rc = stb6100_write_reg(state, STB6100_FCCK, 0x4d | STB6100_FCCK_FCCK); + if (rc < 0) + return rc; /* allow LPF calibration */ + + /* PLL Loop disabled, bias on, VCO on, synth on */ + regs[STB6100_LPEN] = 0xeb; + rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]); + if (rc < 0) + return rc; + + /* Program the registers with their data values */ + + /* VCO divide ratio (LO divide ratio, VCO prescaler enable). */ + if (frequency <= 1075000) + odiv = 1; + else + odiv = 0; + + /* VCO enabled, search clock off as per LL3.7, 3.4.1 */ + regs[STB6100_VCO] = 0xe0 | (odiv << STB6100_VCO_ODIV_SHIFT); + + /* OSM */ + for (ptr = lkup; + (ptr->val_high != 0) && !CHKRANGE(frequency, ptr->val_low, ptr->val_high); + ptr++); + + if (ptr->val_high == 0) { + printk(KERN_ERR "%s: frequency out of range: %u kHz\n", __func__, frequency); + return -EINVAL; + } + regs[STB6100_VCO] = (regs[STB6100_VCO] & ~STB6100_VCO_OSM) | ptr->reg; + rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]); + if (rc < 0) + return rc; + + if ((frequency > 1075000) && (frequency <= 1325000)) + psd2 = 0; + else + psd2 = 1; + /* F(VCO) = F(LO) * (ODIV == 0 ? 2 : 4) */ + fvco = frequency << (1 + odiv); + /* N(I) = floor(f(VCO) / (f(XTAL) * (PSD2 ? 2 : 1))) */ + nint = fvco / (state->reference << psd2); + /* N(F) = round(f(VCO) / f(XTAL) * (PSD2 ? 2 : 1) - N(I)) * 2 ^ 9 */ + nfrac = DIV_ROUND_CLOSEST((fvco - (nint * state->reference << psd2)) + << (9 - psd2), state->reference); + + /* NI */ + regs[STB6100_NI] = nint; + rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]); + if (rc < 0) + return rc; + + /* NF */ + regs[STB6100_NF_LSB] = nfrac; + rc = stb6100_write_reg(state, STB6100_NF_LSB, regs[STB6100_NF_LSB]); + if (rc < 0) + return rc; + + /* K */ + regs[STB6100_K] = (0x38 & ~STB6100_K_PSD2) | (psd2 << STB6100_K_PSD2_SHIFT); + regs[STB6100_K] = (regs[STB6100_K] & ~STB6100_K_NF_MSB) | ((nfrac >> 8) & STB6100_K_NF_MSB); + rc = stb6100_write_reg(state, STB6100_K, regs[STB6100_K]); + if (rc < 0) + return rc; + + /* G Baseband gain. */ + if (srate >= 15000000) + g = 9; /* +4 dB */ + else if (srate >= 5000000) + g = 11; /* +8 dB */ + else + g = 14; /* +14 dB */ + + regs[STB6100_G] = (0x10 & ~STB6100_G_G) | g; + regs[STB6100_G] &= ~STB6100_G_GCT; /* mask GCT */ + regs[STB6100_G] |= (1 << 5); /* 2Vp-p Mode */ + rc = stb6100_write_reg(state, STB6100_G, regs[STB6100_G]); + if (rc < 0) + return rc; + + /* F we don't write as it is set up in BW set */ + + /* DLB set DC servo loop BW to 160Hz (LLA 3.8 / 2.1) */ + regs[STB6100_DLB] = 0xcc; + rc = stb6100_write_reg(state, STB6100_DLB, regs[STB6100_DLB]); + if (rc < 0) + return rc; + + dprintk(verbose, FE_DEBUG, 1, + "frequency = %u, srate = %u, g = %u, odiv = %u, psd2 = %u, fxtal = %u, osm = %u, fvco = %u, N(I) = %u, N(F) = %u", + frequency, srate, (unsigned int)g, (unsigned int)odiv, + (unsigned int)psd2, state->reference, + ptr->reg, fvco, nint, nfrac); + + /* Set up the test registers */ + regs[STB6100_TEST1] = 0x8f; + rc = stb6100_write_reg(state, STB6100_TEST1, regs[STB6100_TEST1]); + if (rc < 0) + return rc; + regs[STB6100_TEST3] = 0xde; + rc = stb6100_write_reg(state, STB6100_TEST3, regs[STB6100_TEST3]); + if (rc < 0) + return rc; + + /* Bring up tuner according to LLA 3.7 3.4.1, step 2 */ + regs[STB6100_LPEN] = 0xfb; /* PLL Loop enabled, bias on, VCO on, synth on */ + rc = stb6100_write_reg(state, STB6100_LPEN, regs[STB6100_LPEN]); + if (rc < 0) + return rc; + + msleep(2); + + /* Bring up tuner according to LLA 3.7 3.4.1, step 3 */ + regs[STB6100_VCO] &= ~STB6100_VCO_OCK; /* VCO fast search */ + rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]); + if (rc < 0) + return rc; + + msleep(10); /* This is dangerous as another (related) thread may start */ /* wait for LO to lock */ + + regs[STB6100_VCO] &= ~STB6100_VCO_OSCH; /* vco search disabled */ + regs[STB6100_VCO] |= STB6100_VCO_OCK; /* search clock off */ + rc = stb6100_write_reg(state, STB6100_VCO, regs[STB6100_VCO]); + if (rc < 0) + return rc; + + rc = stb6100_write_reg(state, STB6100_FCCK, 0x0d); + if (rc < 0) + return rc; /* Stop LPF calibration */ + + msleep(10); /* This is dangerous as another (related) thread may start */ + /* wait for stabilisation, (should not be necessary) */ + return 0; +} + +static int stb6100_sleep(struct dvb_frontend *fe) +{ + /* TODO: power down */ + return 0; +} + +static int stb6100_init(struct dvb_frontend *fe) +{ + struct stb6100_state *state = fe->tuner_priv; + struct tuner_state *status = &state->status; + + status->tunerstep = 125000; + status->ifreq = 0; + status->refclock = 27000000; /* Hz */ + status->iqsense = 1; + status->bandwidth = 36000; /* kHz */ + state->bandwidth = status->bandwidth * 1000; /* Hz */ + state->reference = status->refclock / 1000; /* kHz */ + + /* Set default bandwidth. Modified, PN 13-May-10 */ + return 0; +} + +static int stb6100_get_state(struct dvb_frontend *fe, + enum tuner_param param, + struct tuner_state *state) +{ + switch (param) { + case DVBFE_TUNER_FREQUENCY: + stb6100_get_frequency(fe, &state->frequency); + break; + case DVBFE_TUNER_TUNERSTEP: + break; + case DVBFE_TUNER_IFFREQ: + break; + case DVBFE_TUNER_BANDWIDTH: + stb6100_get_bandwidth(fe, &state->bandwidth); + break; + case DVBFE_TUNER_REFCLOCK: + break; + default: + break; + } + + return 0; +} + +static int stb6100_set_state(struct dvb_frontend *fe, + enum tuner_param param, + struct tuner_state *state) +{ + struct stb6100_state *tstate = fe->tuner_priv; + + switch (param) { + case DVBFE_TUNER_FREQUENCY: + stb6100_set_frequency(fe, state->frequency); + tstate->frequency = state->frequency; + break; + case DVBFE_TUNER_TUNERSTEP: + break; + case DVBFE_TUNER_IFFREQ: + break; + case DVBFE_TUNER_BANDWIDTH: + stb6100_set_bandwidth(fe, state->bandwidth); + tstate->bandwidth = state->bandwidth; + break; + case DVBFE_TUNER_REFCLOCK: + break; + default: + break; + } + + return 0; +} + +static struct dvb_tuner_ops stb6100_ops = { + .info = { + .name = "STB6100 Silicon Tuner", + .frequency_min = 950000, + .frequency_max = 2150000, + .frequency_step = 0, + }, + + .init = stb6100_init, + .sleep = stb6100_sleep, + .get_status = stb6100_get_status, + .get_state = stb6100_get_state, + .set_state = stb6100_set_state, + .release = stb6100_release +}; + +struct dvb_frontend *stb6100_attach(struct dvb_frontend *fe, + const struct stb6100_config *config, + struct i2c_adapter *i2c) +{ + struct stb6100_state *state = NULL; + + state = kzalloc(sizeof (struct stb6100_state), GFP_KERNEL); + if (!state) + return NULL; + + state->config = config; + state->i2c = i2c; + state->frontend = fe; + state->reference = config->refclock / 1000; /* kHz */ + fe->tuner_priv = state; + fe->ops.tuner_ops = stb6100_ops; + + printk("%s: Attaching STB6100 \n", __func__); + return fe; +} + +static int stb6100_release(struct dvb_frontend *fe) +{ + struct stb6100_state *state = fe->tuner_priv; + + fe->tuner_priv = NULL; + kfree(state); + + return 0; +} + +EXPORT_SYMBOL(stb6100_attach); +MODULE_PARM_DESC(verbose, "Set Verbosity level"); + +MODULE_AUTHOR("Manu Abraham"); +MODULE_DESCRIPTION("STB6100 Silicon tuner"); +MODULE_LICENSE("GPL"); |