Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * $Id: dvb-pll.c,v 1.7 2005/02/10 11:52:02 kraxel Exp $ |
| 3 | * |
| 4 | * descriptions + helper functions for simple dvb plls. |
| 5 | * |
| 6 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SuSE Labs] |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/dvb/frontend.h> |
| 25 | #include <asm/types.h> |
| 26 | |
| 27 | #include "dvb-pll.h" |
| 28 | |
| 29 | /* ----------------------------------------------------------- */ |
| 30 | /* descriptions */ |
| 31 | |
| 32 | struct dvb_pll_desc dvb_pll_thomson_dtt7579 = { |
| 33 | .name = "Thomson dtt7579", |
| 34 | .min = 177000000, |
| 35 | .max = 858000000, |
| 36 | .count = 5, |
| 37 | .entries = { |
| 38 | { 0, 36166667, 166666, 0xb4, 0x03 }, /* go sleep */ |
| 39 | { 443250000, 36166667, 166666, 0xb4, 0x02 }, |
| 40 | { 542000000, 36166667, 166666, 0xb4, 0x08 }, |
| 41 | { 771000000, 36166667, 166666, 0xbc, 0x08 }, |
| 42 | { 999999999, 36166667, 166666, 0xf4, 0x08 }, |
| 43 | }, |
| 44 | }; |
| 45 | EXPORT_SYMBOL(dvb_pll_thomson_dtt7579); |
| 46 | |
| 47 | struct dvb_pll_desc dvb_pll_thomson_dtt7610 = { |
| 48 | .name = "Thomson dtt7610", |
| 49 | .min = 44000000, |
| 50 | .max = 958000000, |
| 51 | .count = 3, |
| 52 | .entries = { |
| 53 | { 157250000, 44000000, 62500, 0x8e, 0x39 }, |
| 54 | { 454000000, 44000000, 62500, 0x8e, 0x3a }, |
| 55 | { 999999999, 44000000, 62500, 0x8e, 0x3c }, |
| 56 | }, |
| 57 | }; |
| 58 | EXPORT_SYMBOL(dvb_pll_thomson_dtt7610); |
| 59 | |
| 60 | static void thomson_dtt759x_bw(u8 *buf, int bandwidth) |
| 61 | { |
| 62 | if (BANDWIDTH_7_MHZ == bandwidth) |
| 63 | buf[3] |= 0x10; |
| 64 | } |
| 65 | |
| 66 | struct dvb_pll_desc dvb_pll_thomson_dtt759x = { |
| 67 | .name = "Thomson dtt759x", |
| 68 | .min = 177000000, |
| 69 | .max = 896000000, |
| 70 | .setbw = thomson_dtt759x_bw, |
| 71 | .count = 6, |
| 72 | .entries = { |
| 73 | { 0, 36166667, 166666, 0x84, 0x03 }, |
| 74 | { 264000000, 36166667, 166666, 0xb4, 0x02 }, |
| 75 | { 470000000, 36166667, 166666, 0xbc, 0x02 }, |
| 76 | { 735000000, 36166667, 166666, 0xbc, 0x08 }, |
| 77 | { 835000000, 36166667, 166666, 0xf4, 0x08 }, |
| 78 | { 999999999, 36166667, 166666, 0xfc, 0x08 }, |
| 79 | }, |
| 80 | }; |
| 81 | EXPORT_SYMBOL(dvb_pll_thomson_dtt759x); |
| 82 | |
| 83 | struct dvb_pll_desc dvb_pll_lg_z201 = { |
| 84 | .name = "LG z201", |
| 85 | .min = 174000000, |
| 86 | .max = 862000000, |
| 87 | .count = 5, |
| 88 | .entries = { |
| 89 | { 0, 36166667, 166666, 0xbc, 0x03 }, |
| 90 | { 443250000, 36166667, 166666, 0xbc, 0x01 }, |
| 91 | { 542000000, 36166667, 166666, 0xbc, 0x02 }, |
| 92 | { 830000000, 36166667, 166666, 0xf4, 0x02 }, |
| 93 | { 999999999, 36166667, 166666, 0xfc, 0x02 }, |
| 94 | }, |
| 95 | }; |
| 96 | EXPORT_SYMBOL(dvb_pll_lg_z201); |
| 97 | |
| 98 | struct dvb_pll_desc dvb_pll_unknown_1 = { |
| 99 | .name = "unknown 1", /* used by dntv live dvb-t */ |
| 100 | .min = 174000000, |
| 101 | .max = 862000000, |
| 102 | .count = 9, |
| 103 | .entries = { |
| 104 | { 150000000, 36166667, 166666, 0xb4, 0x01 }, |
| 105 | { 173000000, 36166667, 166666, 0xbc, 0x01 }, |
| 106 | { 250000000, 36166667, 166666, 0xb4, 0x02 }, |
| 107 | { 400000000, 36166667, 166666, 0xbc, 0x02 }, |
| 108 | { 420000000, 36166667, 166666, 0xf4, 0x02 }, |
| 109 | { 470000000, 36166667, 166666, 0xfc, 0x02 }, |
| 110 | { 600000000, 36166667, 166666, 0xbc, 0x08 }, |
| 111 | { 730000000, 36166667, 166666, 0xf4, 0x08 }, |
| 112 | { 999999999, 36166667, 166666, 0xfc, 0x08 }, |
| 113 | }, |
| 114 | }; |
| 115 | EXPORT_SYMBOL(dvb_pll_unknown_1); |
| 116 | |
| 117 | /* ----------------------------------------------------------- */ |
| 118 | /* code */ |
| 119 | |
| 120 | static int debug = 0; |
| 121 | module_param(debug, int, 0644); |
| 122 | MODULE_PARM_DESC(debug, "enable verbose debug messages"); |
| 123 | |
| 124 | int dvb_pll_configure(struct dvb_pll_desc *desc, u8 *buf, |
| 125 | u32 freq, int bandwidth) |
| 126 | { |
| 127 | u32 div; |
| 128 | int i; |
| 129 | |
| 130 | if (freq != 0 && (freq < desc->min || freq > desc->max)) |
| 131 | return -EINVAL; |
| 132 | |
| 133 | for (i = 0; i < desc->count; i++) { |
| 134 | if (freq > desc->entries[i].limit) |
| 135 | continue; |
| 136 | break; |
| 137 | } |
| 138 | if (debug) |
| 139 | printk("pll: %s: freq=%d bw=%d | i=%d/%d\n", |
| 140 | desc->name, freq, bandwidth, i, desc->count); |
| 141 | BUG_ON(i == desc->count); |
| 142 | |
| 143 | div = (freq + desc->entries[i].offset) / desc->entries[i].stepsize; |
| 144 | buf[0] = div >> 8; |
| 145 | buf[1] = div & 0xff; |
| 146 | buf[2] = desc->entries[i].cb1; |
| 147 | buf[3] = desc->entries[i].cb2; |
| 148 | |
| 149 | if (desc->setbw) |
| 150 | desc->setbw(buf, bandwidth); |
| 151 | |
| 152 | if (debug) |
| 153 | printk("pll: %s: div=%d | buf=0x%02x,0x%02x,0x%02x,0x%02x\n", |
| 154 | desc->name, div, buf[0], buf[1], buf[2], buf[3]); |
| 155 | |
| 156 | return 0; |
| 157 | } |
| 158 | EXPORT_SYMBOL(dvb_pll_configure); |
| 159 | |
| 160 | MODULE_DESCRIPTION("dvb pll library"); |
| 161 | MODULE_AUTHOR("Gerd Knorr"); |
| 162 | MODULE_LICENSE("GPL"); |
| 163 | |
| 164 | /* |
| 165 | * Local variables: |
| 166 | * c-basic-offset: 8 |
| 167 | * End: |
| 168 | */ |