diff options
Diffstat (limited to 'drivers/media/tuners/it913x.c')
| -rw-r--r-- | drivers/media/tuners/it913x.c | 466 |
1 files changed, 466 insertions, 0 deletions
diff --git a/drivers/media/tuners/it913x.c b/drivers/media/tuners/it913x.c new file mode 100644 index 000000000..b5eb39921 --- /dev/null +++ b/drivers/media/tuners/it913x.c @@ -0,0 +1,466 @@ +/* + * ITE IT913X silicon tuner driver + * + * Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com) + * IT9137 Copyright (C) ITE Tech Inc. + * + * 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. + */ + +#include "it913x.h" +#include <linux/platform_device.h> +#include <linux/regmap.h> + +struct it913x_dev { + struct platform_device *pdev; + struct regmap *regmap; + struct dvb_frontend *fe; + u8 chip_ver:2; + u8 role:2; + u16 xtal; + u8 fdiv; + u8 clk_mode; + u32 fn_min; + bool active; +}; + +static int it913x_init(struct dvb_frontend *fe) +{ + struct it913x_dev *dev = fe->tuner_priv; + struct platform_device *pdev = dev->pdev; + int ret; + unsigned int utmp; + u8 iqik_m_cal, nv_val, buf[2]; + static const u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2}; + unsigned long timeout; + + dev_dbg(&pdev->dev, "role %u\n", dev->role); + + ret = regmap_write(dev->regmap, 0x80ec4c, 0x68); + if (ret) + goto err; + + usleep_range(10000, 100000); + + ret = regmap_read(dev->regmap, 0x80ec86, &utmp); + if (ret) + goto err; + + switch (utmp) { + case 0: + /* 12.000 MHz */ + dev->clk_mode = utmp; + dev->xtal = 2000; + dev->fdiv = 3; + iqik_m_cal = 16; + break; + case 1: + /* 20.480 MHz */ + dev->clk_mode = utmp; + dev->xtal = 640; + dev->fdiv = 1; + iqik_m_cal = 6; + break; + default: + dev_err(&pdev->dev, "unknown clock identifier %d\n", utmp); + goto err; + } + + ret = regmap_read(dev->regmap, 0x80ed03, &utmp); + if (ret) + goto err; + + else if (utmp < ARRAY_SIZE(nv)) + nv_val = nv[utmp]; + else + nv_val = 2; + + #define TIMEOUT 50 + timeout = jiffies + msecs_to_jiffies(TIMEOUT); + while (!time_after(jiffies, timeout)) { + ret = regmap_bulk_read(dev->regmap, 0x80ed23, buf, 2); + if (ret) + goto err; + + utmp = (buf[1] << 8) | (buf[0] << 0); + if (utmp) + break; + } + + dev_dbg(&pdev->dev, "r_fbc_m_bdry took %u ms, val %u\n", + jiffies_to_msecs(jiffies) - + (jiffies_to_msecs(timeout) - TIMEOUT), utmp); + + dev->fn_min = dev->xtal * utmp; + dev->fn_min /= (dev->fdiv * nv_val); + dev->fn_min *= 1000; + dev_dbg(&pdev->dev, "fn_min %u\n", dev->fn_min); + + /* + * Chip version BX never sets that flag so we just wait 50ms in that + * case. It is possible poll BX similarly than AX and then timeout in + * order to get 50ms delay, but that causes about 120 extra I2C + * messages. As for now, we just wait and reduce IO. + */ + if (dev->chip_ver == 1) { + #define TIMEOUT 50 + timeout = jiffies + msecs_to_jiffies(TIMEOUT); + while (!time_after(jiffies, timeout)) { + ret = regmap_read(dev->regmap, 0x80ec82, &utmp); + if (ret) + goto err; + + if (utmp) + break; + } + + dev_dbg(&pdev->dev, "p_tsm_init_mode took %u ms, val %u\n", + jiffies_to_msecs(jiffies) - + (jiffies_to_msecs(timeout) - TIMEOUT), utmp); + } else { + msleep(50); + } + + ret = regmap_write(dev->regmap, 0x80ed81, iqik_m_cal); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80ec57, 0x00); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80ec58, 0x00); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80ec40, 0x01); + if (ret) + goto err; + + dev->active = true; + + return 0; +err: + dev_dbg(&pdev->dev, "failed %d\n", ret); + return ret; +} + +static int it913x_sleep(struct dvb_frontend *fe) +{ + struct it913x_dev *dev = fe->tuner_priv; + struct platform_device *pdev = dev->pdev; + int ret, len; + + dev_dbg(&pdev->dev, "role %u\n", dev->role); + + dev->active = false; + + ret = regmap_bulk_write(dev->regmap, 0x80ec40, "\x00", 1); + if (ret) + goto err; + + /* + * Writing '0x00' to master tuner register '0x80ec08' causes slave tuner + * communication lost. Due to that, we cannot put master full sleep. + */ + if (dev->role == IT913X_ROLE_DUAL_MASTER) + len = 4; + else + len = 15; + + dev_dbg(&pdev->dev, "role %u, len %d\n", dev->role, len); + + ret = regmap_bulk_write(dev->regmap, 0x80ec02, + "\x3f\x1f\x3f\x3e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", + len); + if (ret) + goto err; + + ret = regmap_bulk_write(dev->regmap, 0x80ec12, "\x00\x00\x00\x00", 4); + if (ret) + goto err; + + ret = regmap_bulk_write(dev->regmap, 0x80ec17, + "\x00\x00\x00\x00\x00\x00\x00\x00\x00", 9); + if (ret) + goto err; + + ret = regmap_bulk_write(dev->regmap, 0x80ec22, + "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 10); + if (ret) + goto err; + + ret = regmap_bulk_write(dev->regmap, 0x80ec20, "\x00", 1); + if (ret) + goto err; + + ret = regmap_bulk_write(dev->regmap, 0x80ec3f, "\x01", 1); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&pdev->dev, "failed %d\n", ret); + return ret; +} + +static int it913x_set_params(struct dvb_frontend *fe) +{ + struct it913x_dev *dev = fe->tuner_priv; + struct platform_device *pdev = dev->pdev; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + unsigned int utmp; + u32 pre_lo_freq, t_cal_freq; + u16 iqik_m_cal, n_div; + u8 u8tmp, n, l_band, lna_band; + + dev_dbg(&pdev->dev, "role=%u, frequency %u, bandwidth_hz %u\n", + dev->role, c->frequency, c->bandwidth_hz); + + if (!dev->active) { + ret = -EINVAL; + goto err; + } + + if (c->frequency <= 74000000) { + n_div = 48; + n = 0; + } else if (c->frequency <= 111000000) { + n_div = 32; + n = 1; + } else if (c->frequency <= 148000000) { + n_div = 24; + n = 2; + } else if (c->frequency <= 222000000) { + n_div = 16; + n = 3; + } else if (c->frequency <= 296000000) { + n_div = 12; + n = 4; + } else if (c->frequency <= 445000000) { + n_div = 8; + n = 5; + } else if (c->frequency <= dev->fn_min) { + n_div = 6; + n = 6; + } else if (c->frequency <= 950000000) { + n_div = 4; + n = 7; + } else { + n_div = 2; + n = 0; + } + + ret = regmap_read(dev->regmap, 0x80ed81, &utmp); + if (ret) + goto err; + + iqik_m_cal = utmp * n_div; + + if (utmp < 0x20) { + if (dev->clk_mode == 0) + iqik_m_cal = (iqik_m_cal * 9) >> 5; + else + iqik_m_cal >>= 1; + } else { + iqik_m_cal = 0x40 - iqik_m_cal; + if (dev->clk_mode == 0) + iqik_m_cal = ~((iqik_m_cal * 9) >> 5); + else + iqik_m_cal = ~(iqik_m_cal >> 1); + } + + t_cal_freq = (c->frequency / 1000) * n_div * dev->fdiv; + pre_lo_freq = t_cal_freq / dev->xtal; + utmp = pre_lo_freq * dev->xtal; + + if ((t_cal_freq - utmp) >= (dev->xtal >> 1)) + pre_lo_freq++; + + pre_lo_freq += (u32) n << 13; + /* Frequency OMEGA_IQIK_M_CAL_MID*/ + t_cal_freq = pre_lo_freq + (u32)iqik_m_cal; + dev_dbg(&pdev->dev, "t_cal_freq %u, pre_lo_freq %u\n", + t_cal_freq, pre_lo_freq); + + if (c->frequency <= 440000000) { + l_band = 0; + lna_band = 0; + } else if (c->frequency <= 484000000) { + l_band = 1; + lna_band = 1; + } else if (c->frequency <= 533000000) { + l_band = 1; + lna_band = 2; + } else if (c->frequency <= 587000000) { + l_band = 1; + lna_band = 3; + } else if (c->frequency <= 645000000) { + l_band = 1; + lna_band = 4; + } else if (c->frequency <= 710000000) { + l_band = 1; + lna_band = 5; + } else if (c->frequency <= 782000000) { + l_band = 1; + lna_band = 6; + } else if (c->frequency <= 860000000) { + l_band = 1; + lna_band = 7; + } else if (c->frequency <= 1492000000) { + l_band = 1; + lna_band = 0; + } else if (c->frequency <= 1685000000) { + l_band = 1; + lna_band = 1; + } else { + ret = -EINVAL; + goto err; + } + + /* XXX: latest windows driver does not set that at all */ + ret = regmap_write(dev->regmap, 0x80ee06, lna_band); + if (ret) + goto err; + + if (c->bandwidth_hz <= 5000000) + u8tmp = 0; + else if (c->bandwidth_hz <= 6000000) + u8tmp = 2; + else if (c->bandwidth_hz <= 7000000) + u8tmp = 4; + else + u8tmp = 6; /* 8000000 */ + + ret = regmap_write(dev->regmap, 0x80ec56, u8tmp); + if (ret) + goto err; + + /* XXX: latest windows driver sets different value (a8 != 68) */ + ret = regmap_write(dev->regmap, 0x80ec4c, 0xa0 | (l_band << 3)); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80ec4d, (t_cal_freq >> 0) & 0xff); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80ec4e, (t_cal_freq >> 8) & 0xff); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80011e, (pre_lo_freq >> 0) & 0xff); + if (ret) + goto err; + + ret = regmap_write(dev->regmap, 0x80011f, (pre_lo_freq >> 8) & 0xff); + if (ret) + goto err; + + return 0; +err: + dev_dbg(&pdev->dev, "failed %d\n", ret); + return ret; +} + +static const struct dvb_tuner_ops it913x_tuner_ops = { + .info = { + .name = "ITE IT913X", + .frequency_min_hz = 174 * MHz, + .frequency_max_hz = 862 * MHz, + }, + + .init = it913x_init, + .sleep = it913x_sleep, + .set_params = it913x_set_params, +}; + +static int it913x_probe(struct platform_device *pdev) +{ + struct it913x_platform_data *pdata = pdev->dev.platform_data; + struct dvb_frontend *fe = pdata->fe; + struct it913x_dev *dev; + const struct platform_device_id *id = platform_get_device_id(pdev); + int ret; + char *chip_ver_str; + + dev = kzalloc(sizeof(struct it913x_dev), GFP_KERNEL); + if (dev == NULL) { + ret = -ENOMEM; + dev_err(&pdev->dev, "kzalloc() failed\n"); + goto err; + } + + dev->pdev = pdev; + dev->regmap = pdata->regmap; + dev->fe = pdata->fe; + dev->chip_ver = id->driver_data; + dev->role = pdata->role; + + fe->tuner_priv = dev; + memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops, + sizeof(struct dvb_tuner_ops)); + platform_set_drvdata(pdev, dev); + + if (dev->chip_ver == 1) + chip_ver_str = "AX"; + else if (dev->chip_ver == 2) + chip_ver_str = "BX"; + else + chip_ver_str = "??"; + + dev_info(&pdev->dev, "ITE IT913X %s successfully attached\n", + chip_ver_str); + dev_dbg(&pdev->dev, "chip_ver %u, role %u\n", dev->chip_ver, dev->role); + return 0; +err: + dev_dbg(&pdev->dev, "failed %d\n", ret); + return ret; +} + +static int it913x_remove(struct platform_device *pdev) +{ + struct it913x_dev *dev = platform_get_drvdata(pdev); + struct dvb_frontend *fe = dev->fe; + + dev_dbg(&pdev->dev, "\n"); + + memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops)); + fe->tuner_priv = NULL; + kfree(dev); + + return 0; +} + +static const struct platform_device_id it913x_id_table[] = { + {"it9133ax-tuner", 1}, + {"it9133bx-tuner", 2}, + {}, +}; +MODULE_DEVICE_TABLE(platform, it913x_id_table); + +static struct platform_driver it913x_driver = { + .driver = { + .name = "it913x", + .suppress_bind_attrs = true, + }, + .probe = it913x_probe, + .remove = it913x_remove, + .id_table = it913x_id_table, +}; + +module_platform_driver(it913x_driver); + +MODULE_DESCRIPTION("ITE IT913X silicon tuner driver"); +MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); +MODULE_LICENSE("GPL"); |