diff options
Diffstat (limited to 'drivers/media/dvb/frontends/dvb-pll.c')
| -rw-r--r-- | drivers/media/dvb/frontends/dvb-pll.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/dvb-pll.c b/drivers/media/dvb/frontends/dvb-pll.c new file mode 100644 index 00000000000..2a3c2ce7b2a --- /dev/null +++ b/drivers/media/dvb/frontends/dvb-pll.c @@ -0,0 +1,168 @@ +/* + * $Id: dvb-pll.c,v 1.7 2005/02/10 11:52:02 kraxel Exp $ + * + * descriptions + helper functions for simple dvb plls. + * + * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] + * + * 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/module.h> +#include <linux/dvb/frontend.h> +#include <asm/types.h> + +#include "dvb-pll.h" + +/* ----------------------------------------------------------- */ +/* descriptions */ + +struct dvb_pll_desc dvb_pll_thomson_dtt7579 = { + .name = "Thomson dtt7579", + .min = 177000000, + .max = 858000000, + .count = 5, + .entries = { + { 0, 36166667, 166666, 0xb4, 0x03 }, /* go sleep */ + { 443250000, 36166667, 166666, 0xb4, 0x02 }, + { 542000000, 36166667, 166666, 0xb4, 0x08 }, + { 771000000, 36166667, 166666, 0xbc, 0x08 }, + { 999999999, 36166667, 166666, 0xf4, 0x08 }, + }, +}; +EXPORT_SYMBOL(dvb_pll_thomson_dtt7579); + +struct dvb_pll_desc dvb_pll_thomson_dtt7610 = { + .name = "Thomson dtt7610", + .min = 44000000, + .max = 958000000, + .count = 3, + .entries = { + { 157250000, 44000000, 62500, 0x8e, 0x39 }, + { 454000000, 44000000, 62500, 0x8e, 0x3a }, + { 999999999, 44000000, 62500, 0x8e, 0x3c }, + }, +}; +EXPORT_SYMBOL(dvb_pll_thomson_dtt7610); + +static void thomson_dtt759x_bw(u8 *buf, int bandwidth) +{ + if (BANDWIDTH_7_MHZ == bandwidth) + buf[3] |= 0x10; +} + +struct dvb_pll_desc dvb_pll_thomson_dtt759x = { + .name = "Thomson dtt759x", + .min = 177000000, + .max = 896000000, + .setbw = thomson_dtt759x_bw, + .count = 6, + .entries = { + { 0, 36166667, 166666, 0x84, 0x03 }, + { 264000000, 36166667, 166666, 0xb4, 0x02 }, + { 470000000, 36166667, 166666, 0xbc, 0x02 }, + { 735000000, 36166667, 166666, 0xbc, 0x08 }, + { 835000000, 36166667, 166666, 0xf4, 0x08 }, + { 999999999, 36166667, 166666, 0xfc, 0x08 }, + }, +}; +EXPORT_SYMBOL(dvb_pll_thomson_dtt759x); + +struct dvb_pll_desc dvb_pll_lg_z201 = { + .name = "LG z201", + .min = 174000000, + .max = 862000000, + .count = 5, + .entries = { + { 0, 36166667, 166666, 0xbc, 0x03 }, + { 443250000, 36166667, 166666, 0xbc, 0x01 }, + { 542000000, 36166667, 166666, 0xbc, 0x02 }, + { 830000000, 36166667, 166666, 0xf4, 0x02 }, + { 999999999, 36166667, 166666, 0xfc, 0x02 }, + }, +}; +EXPORT_SYMBOL(dvb_pll_lg_z201); + +struct dvb_pll_desc dvb_pll_unknown_1 = { + .name = "unknown 1", /* used by dntv live dvb-t */ + .min = 174000000, + .max = 862000000, + .count = 9, + .entries = { + { 150000000, 36166667, 166666, 0xb4, 0x01 }, + { 173000000, 36166667, 166666, 0xbc, 0x01 }, + { 250000000, 36166667, 166666, 0xb4, 0x02 }, + { 400000000, 36166667, 166666, 0xbc, 0x02 }, + { 420000000, 36166667, 166666, 0xf4, 0x02 }, + { 470000000, 36166667, 166666, 0xfc, 0x02 }, + { 600000000, 36166667, 166666, 0xbc, 0x08 }, + { 730000000, 36166667, 166666, 0xf4, 0x08 }, + { 999999999, 36166667, 166666, 0xfc, 0x08 }, + }, +}; +EXPORT_SYMBOL(dvb_pll_unknown_1); + +/* ----------------------------------------------------------- */ +/* code */ + +static int debug = 0; +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "enable verbose debug messages"); + +int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf, + u32 freq, int bandwidth) +{ + u32 div; + int i; + + if (freq != 0 && (freq < desc->min || freq > desc->max)) + return -EINVAL; + + for (i = 0; i < desc->count; i++) { + if (freq > desc->entries[i].limit) + continue; + break; + } + if (debug) + printk("pll: %s: freq=%d bw=%d | i=%d/%d\n", + desc->name, freq, bandwidth, i, desc->count); + BUG_ON(i == desc->count); + + div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize; + buf[0] = div >> 8; + buf[1] = div & 0xff; + buf[2] = desc->entries[i].cb1; + buf[3] = desc->entries[i].cb2; + + if (desc->setbw) + desc->setbw(buf, bandwidth); + + if (debug) + printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n", + desc->name, div, buf[0], buf[1], buf[2], buf[3]); + + return 0; +} +EXPORT_SYMBOL(dvb_pll_configure); + +MODULE_DESCRIPTION("dvb pll library"); +MODULE_AUTHOR("Gerd Knorr"); +MODULE_LICENSE("GPL"); + +/* + * Local variables: + * c-basic-offset: 8 + * End: + */ |