1 /* $NetBSD: tvpll.c,v 1.5 2013/10/17 21:18:43 christos 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 1.5 2013/10/17 21:18:43 christos 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, "iic"); 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