1 /* 2 * 3 * 4 * Copyright (C) 2005 Mike Isely <isely@pobox.com> 5 * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/slab.h> 23 #include "pvrusb2-eeprom.h" 24 #include "pvrusb2-hdw-internal.h" 25 #include "pvrusb2-debug.h" 26 27 #define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__) 28 29 30 31 /* 32 33 Read and analyze data in the eeprom. Use tveeprom to figure out 34 the packet structure, since this is another Hauppauge device and 35 internally it has a family resemblance to ivtv-type devices 36 37 */ 38 39 #include <media/tveeprom.h> 40 41 /* We seem to only be interested in the last 128 bytes of the EEPROM */ 42 #define EEPROM_SIZE 128 43 44 /* Grab EEPROM contents, needed for direct method. */ 45 static u8 *pvr2_eeprom_fetch(struct pvr2_hdw *hdw) 46 { 47 struct i2c_msg msg[2]; 48 u8 *eeprom; 49 u8 iadd[2]; 50 u8 addr; 51 u16 eepromSize; 52 unsigned int offs; 53 int ret; 54 int mode16 = 0; 55 unsigned pcnt,tcnt; 56 eeprom = kmalloc(EEPROM_SIZE,GFP_KERNEL); 57 if (!eeprom) { 58 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 59 "Failed to allocate memory" 60 " required to read eeprom"); 61 return NULL; 62 } 63 64 trace_eeprom("Value for eeprom addr from controller was 0x%x", 65 hdw->eeprom_addr); 66 addr = hdw->eeprom_addr; 67 /* Seems that if the high bit is set, then the *real* eeprom 68 address is shifted right now bit position (noticed this in 69 newer PVR USB2 hardware) */ 70 if (addr & 0x80) addr >>= 1; 71 72 /* FX2 documentation states that a 16bit-addressed eeprom is 73 expected if the I2C address is an odd number (yeah, this is 74 strange but it's what they do) */ 75 mode16 = (addr & 1); 76 eepromSize = (mode16 ? 4096 : 256); 77 trace_eeprom("Examining %d byte eeprom at location 0x%x" 78 " using %d bit addressing",eepromSize,addr, 79 mode16 ? 16 : 8); 80 81 msg[0].addr = addr; 82 msg[0].flags = 0; 83 msg[0].len = mode16 ? 2 : 1; 84 msg[0].buf = iadd; 85 msg[1].addr = addr; 86 msg[1].flags = I2C_M_RD; 87 88 /* We have to do the actual eeprom data fetch ourselves, because 89 (1) we're only fetching part of the eeprom, and (2) if we were 90 getting the whole thing our I2C driver can't grab it in one 91 pass - which is what tveeprom is otherwise going to attempt */ 92 memset(eeprom,0,EEPROM_SIZE); 93 for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) { 94 pcnt = 16; 95 if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt; 96 offs = tcnt + (eepromSize - EEPROM_SIZE); 97 if (mode16) { 98 iadd[0] = offs >> 8; 99 iadd[1] = offs; 100 } else { 101 iadd[0] = offs; 102 } 103 msg[1].len = pcnt; 104 msg[1].buf = eeprom+tcnt; 105 if ((ret = i2c_transfer(&hdw->i2c_adap, 106 msg,ARRAY_SIZE(msg))) != 2) { 107 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 108 "eeprom fetch set offs err=%d",ret); 109 kfree(eeprom); 110 return NULL; 111 } 112 } 113 return eeprom; 114 } 115 116 117 /* Directly call eeprom analysis function within tveeprom. */ 118 int pvr2_eeprom_analyze(struct pvr2_hdw *hdw) 119 { 120 u8 *eeprom; 121 struct tveeprom tvdata; 122 123 memset(&tvdata,0,sizeof(tvdata)); 124 125 eeprom = pvr2_eeprom_fetch(hdw); 126 if (!eeprom) return -EINVAL; 127 128 { 129 struct i2c_client fake_client; 130 /* Newer version expects a useless client interface */ 131 fake_client.addr = hdw->eeprom_addr; 132 fake_client.adapter = &hdw->i2c_adap; 133 tveeprom_hauppauge_analog(&fake_client,&tvdata,eeprom); 134 } 135 136 trace_eeprom("eeprom assumed v4l tveeprom module"); 137 trace_eeprom("eeprom direct call results:"); 138 trace_eeprom("has_radio=%d",tvdata.has_radio); 139 trace_eeprom("tuner_type=%d",tvdata.tuner_type); 140 trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats); 141 trace_eeprom("audio_processor=%d",tvdata.audio_processor); 142 trace_eeprom("model=%d",tvdata.model); 143 trace_eeprom("revision=%d",tvdata.revision); 144 trace_eeprom("serial_number=%d",tvdata.serial_number); 145 trace_eeprom("rev_str=%s",tvdata.rev_str); 146 hdw->tuner_type = tvdata.tuner_type; 147 hdw->tuner_updated = !0; 148 hdw->serial_number = tvdata.serial_number; 149 hdw->std_mask_eeprom = tvdata.tuner_formats; 150 151 kfree(eeprom); 152 153 return 0; 154 } 155