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 required to read eeprom"); 60 return NULL; 61 } 62 63 trace_eeprom("Value for eeprom addr from controller was 0x%x", 64 hdw->eeprom_addr); 65 addr = hdw->eeprom_addr; 66 /* Seems that if the high bit is set, then the *real* eeprom 67 address is shifted right now bit position (noticed this in 68 newer PVR USB2 hardware) */ 69 if (addr & 0x80) addr >>= 1; 70 71 /* FX2 documentation states that a 16bit-addressed eeprom is 72 expected if the I2C address is an odd number (yeah, this is 73 strange but it's what they do) */ 74 mode16 = (addr & 1); 75 eepromSize = (mode16 ? 4096 : 256); 76 trace_eeprom("Examining %d byte eeprom at location 0x%x using %d bit addressing", 77 eepromSize, addr, 78 mode16 ? 16 : 8); 79 80 msg[0].addr = addr; 81 msg[0].flags = 0; 82 msg[0].len = mode16 ? 2 : 1; 83 msg[0].buf = iadd; 84 msg[1].addr = addr; 85 msg[1].flags = I2C_M_RD; 86 87 /* We have to do the actual eeprom data fetch ourselves, because 88 (1) we're only fetching part of the eeprom, and (2) if we were 89 getting the whole thing our I2C driver can't grab it in one 90 pass - which is what tveeprom is otherwise going to attempt */ 91 memset(eeprom,0,EEPROM_SIZE); 92 for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) { 93 pcnt = 16; 94 if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt; 95 offs = tcnt + (eepromSize - EEPROM_SIZE); 96 if (mode16) { 97 iadd[0] = offs >> 8; 98 iadd[1] = offs; 99 } else { 100 iadd[0] = offs; 101 } 102 msg[1].len = pcnt; 103 msg[1].buf = eeprom+tcnt; 104 if ((ret = i2c_transfer(&hdw->i2c_adap, 105 msg,ARRAY_SIZE(msg))) != 2) { 106 pvr2_trace(PVR2_TRACE_ERROR_LEGS, 107 "eeprom fetch set offs err=%d",ret); 108 kfree(eeprom); 109 return NULL; 110 } 111 } 112 return eeprom; 113 } 114 115 116 /* Directly call eeprom analysis function within tveeprom. */ 117 int pvr2_eeprom_analyze(struct pvr2_hdw *hdw) 118 { 119 u8 *eeprom; 120 struct tveeprom tvdata; 121 122 memset(&tvdata,0,sizeof(tvdata)); 123 124 eeprom = pvr2_eeprom_fetch(hdw); 125 if (!eeprom) return -EINVAL; 126 127 { 128 struct i2c_client fake_client; 129 /* Newer version expects a useless client interface */ 130 fake_client.addr = hdw->eeprom_addr; 131 fake_client.adapter = &hdw->i2c_adap; 132 tveeprom_hauppauge_analog(&fake_client,&tvdata,eeprom); 133 } 134 135 trace_eeprom("eeprom assumed v4l tveeprom module"); 136 trace_eeprom("eeprom direct call results:"); 137 trace_eeprom("has_radio=%d",tvdata.has_radio); 138 trace_eeprom("tuner_type=%d",tvdata.tuner_type); 139 trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats); 140 trace_eeprom("audio_processor=%d",tvdata.audio_processor); 141 trace_eeprom("model=%d",tvdata.model); 142 trace_eeprom("revision=%d",tvdata.revision); 143 trace_eeprom("serial_number=%d",tvdata.serial_number); 144 trace_eeprom("rev_str=%s",tvdata.rev_str); 145 hdw->tuner_type = tvdata.tuner_type; 146 hdw->tuner_updated = !0; 147 hdw->serial_number = tvdata.serial_number; 148 hdw->std_mask_eeprom = tvdata.tuner_formats; 149 150 kfree(eeprom); 151 152 return 0; 153 } 154