| 1 | /* $NetBSD: tvpll.c,v 1.6 2015/03/07 14:16:51 jmcneill Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2008, 2011 Jonathan A. Kollasch |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| 20 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 21 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 25 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 26 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | #include <sys/cdefs.h> |
| 30 | __KERNEL_RCSID(0, "$NetBSD: tvpll.c,v 1.6 2015/03/07 14:16:51 jmcneill Exp $" ); |
| 31 | |
| 32 | #include <sys/param.h> |
| 33 | #include <sys/systm.h> |
| 34 | #include <sys/device.h> |
| 35 | #include <sys/kmem.h> |
| 36 | #include <sys/syslog.h> |
| 37 | #include <sys/module.h> |
| 38 | |
| 39 | #include <dev/dtv/dtvio.h> |
| 40 | #include <dev/i2c/i2cvar.h> |
| 41 | #include <dev/i2c/tvpllvar.h> |
| 42 | |
| 43 | struct tvpll { |
| 44 | device_t parent; |
| 45 | i2c_tag_t tag; |
| 46 | i2c_addr_t addr; |
| 47 | const struct tvpll_data * pll; |
| 48 | uint32_t frequency; |
| 49 | }; |
| 50 | |
| 51 | static uint32_t tvpll_algo(struct tvpll *, uint8_t *, |
| 52 | const struct dvb_frontend_parameters *, uint32_t *); |
| 53 | |
| 54 | struct tvpll * |
| 55 | tvpll_open(device_t parent, i2c_tag_t t, i2c_addr_t a, struct tvpll_data *p) |
| 56 | { |
| 57 | struct tvpll *tvpll; |
| 58 | |
| 59 | tvpll = kmem_alloc(sizeof(struct tvpll), KM_SLEEP); |
| 60 | if (tvpll == NULL) |
| 61 | return NULL; |
| 62 | |
| 63 | tvpll->tag = t; |
| 64 | tvpll->addr = a; |
| 65 | |
| 66 | tvpll->pll = p; |
| 67 | |
| 68 | if (tvpll->pll->initdata) { |
| 69 | iic_acquire_bus(tvpll->tag, I2C_F_POLL); |
| 70 | (void)iic_exec(tvpll->tag, I2C_OP_WRITE_WITH_STOP, tvpll->addr, |
| 71 | &tvpll->pll->initdata[1], tvpll->pll->initdata[0], |
| 72 | NULL, 0, I2C_F_POLL); |
| 73 | iic_release_bus(tvpll->tag, I2C_F_POLL); |
| 74 | } |
| 75 | |
| 76 | device_printf(parent, "tvpll: %s\n" , tvpll->pll->name); |
| 77 | |
| 78 | return tvpll; |
| 79 | } |
| 80 | |
| 81 | void |
| 82 | tvpll_close(struct tvpll *tvpll) |
| 83 | { |
| 84 | kmem_free(tvpll, sizeof(*tvpll)); |
| 85 | } |
| 86 | |
| 87 | static uint32_t |
| 88 | tvpll_algo(struct tvpll *tvpll, uint8_t *b, |
| 89 | const struct dvb_frontend_parameters *p, uint32_t *fr) |
| 90 | { |
| 91 | const struct tvpll_data *pll; |
| 92 | uint32_t d; |
| 93 | int i; |
| 94 | |
| 95 | pll = tvpll->pll; |
| 96 | |
| 97 | if(p->frequency != 0 && |
| 98 | (p->frequency < pll->min || p->frequency > pll->max)) |
| 99 | return 0; |
| 100 | |
| 101 | for(i = 0; i < pll->count; i++) { |
| 102 | if (p->frequency > pll->entries[i].limit) |
| 103 | continue; |
| 104 | else |
| 105 | break; |
| 106 | } |
| 107 | |
| 108 | if ( i >= pll->count) |
| 109 | return EINVAL; |
| 110 | |
| 111 | d = (p->frequency + pll->iffreq) / pll->entries[i].stepsize; |
| 112 | |
| 113 | b[0] = (d >> 8) & 0xff; |
| 114 | b[1] = (d >> 0) & 0xff; |
| 115 | b[2] = pll->entries[i].config; |
| 116 | b[3] = pll->entries[i].cb; |
| 117 | b[4] = pll->entries[i].aux; |
| 118 | |
| 119 | *fr = (d * pll->entries[i].stepsize) - pll->iffreq; |
| 120 | |
| 121 | log(LOG_DEBUG, "pllw %d %02x %02x %02x %02x %02x\n" , *fr, b[0], b[1], b[2], b[3], b[4]); |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | int |
| 126 | tvpll_tune_dtv(struct tvpll *tvpll, |
| 127 | const struct dvb_frontend_parameters *params) |
| 128 | { |
| 129 | int rv; |
| 130 | uint32_t fr; |
| 131 | uint8_t b[5], ab[2]; |
| 132 | |
| 133 | fr = 0; |
| 134 | |
| 135 | if((rv = tvpll_algo(tvpll, b, params, &fr)) != 0) |
| 136 | return rv; |
| 137 | |
| 138 | iic_acquire_bus(tvpll->tag, I2C_F_POLL); |
| 139 | /* gate ctrl? */ |
| 140 | if (b[4] != TVPLL_IGNORE_AUX) { |
| 141 | ab[0] = b[2] | 0x18; |
| 142 | ab[1] = b[4]; |
| 143 | rv = iic_exec(tvpll->tag, I2C_OP_WRITE_WITH_STOP, tvpll->addr, ab, 2, NULL, 0, I2C_F_POLL); |
| 144 | } |
| 145 | rv = iic_exec(tvpll->tag, I2C_OP_WRITE_WITH_STOP, tvpll->addr, b, 4, NULL, 0, I2C_F_POLL); |
| 146 | iic_release_bus(tvpll->tag, I2C_F_POLL); |
| 147 | |
| 148 | if (rv != 0) |
| 149 | printf("%s\n" , __func__); |
| 150 | |
| 151 | tvpll->frequency = fr; |
| 152 | |
| 153 | return rv; |
| 154 | } |
| 155 | |
| 156 | MODULE(MODULE_CLASS_DRIVER, tvpll, "i2cexec" ); |
| 157 | |
| 158 | static int |
| 159 | tvpll_modcmd(modcmd_t cmd, void *opaque) |
| 160 | { |
| 161 | if (cmd == MODULE_CMD_INIT || cmd == MODULE_CMD_FINI) |
| 162 | return 0; |
| 163 | return ENOTTY; |
| 164 | } |
| 165 | |