134 lines
3.6 KiB
C
134 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* Copyright (C) 2005 Mike Isely <isely@pobox.com>
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* Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
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*/
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#include <linux/slab.h>
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#include "pvrusb2-eeprom.h"
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#include "pvrusb2-hdw-internal.h"
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#include "pvrusb2-debug.h"
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#define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__)
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/*
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Read and analyze data in the eeprom. Use tveeprom to figure out
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the packet structure, since this is another Hauppauge device and
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internally it has a family resemblance to ivtv-type devices
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*/
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#include <media/tveeprom.h>
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/* We seem to only be interested in the last 128 bytes of the EEPROM */
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#define EEPROM_SIZE 128
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/* Grab EEPROM contents, needed for direct method. */
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static u8 *pvr2_eeprom_fetch(struct pvr2_hdw *hdw)
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{
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struct i2c_msg msg[2];
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u8 *eeprom;
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u8 iadd[2];
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u8 addr;
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u16 eepromSize;
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unsigned int offs;
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int ret;
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int mode16 = 0;
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unsigned pcnt,tcnt;
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eeprom = kzalloc(EEPROM_SIZE, GFP_KERNEL);
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if (!eeprom) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"Failed to allocate memory required to read eeprom");
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return NULL;
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}
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trace_eeprom("Value for eeprom addr from controller was 0x%x",
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hdw->eeprom_addr);
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addr = hdw->eeprom_addr;
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/* Seems that if the high bit is set, then the *real* eeprom
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address is shifted right now bit position (noticed this in
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newer PVR USB2 hardware) */
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if (addr & 0x80) addr >>= 1;
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/* FX2 documentation states that a 16bit-addressed eeprom is
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expected if the I2C address is an odd number (yeah, this is
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strange but it's what they do) */
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mode16 = (addr & 1);
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eepromSize = (mode16 ? 4096 : 256);
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trace_eeprom("Examining %d byte eeprom at location 0x%x using %d bit addressing",
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eepromSize, addr,
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mode16 ? 16 : 8);
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msg[0].addr = addr;
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msg[0].flags = 0;
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msg[0].len = mode16 ? 2 : 1;
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msg[0].buf = iadd;
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msg[1].addr = addr;
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msg[1].flags = I2C_M_RD;
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/* We have to do the actual eeprom data fetch ourselves, because
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(1) we're only fetching part of the eeprom, and (2) if we were
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getting the whole thing our I2C driver can't grab it in one
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pass - which is what tveeprom is otherwise going to attempt */
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for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) {
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pcnt = 16;
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if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt;
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offs = tcnt + (eepromSize - EEPROM_SIZE);
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if (mode16) {
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iadd[0] = offs >> 8;
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iadd[1] = offs;
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} else {
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iadd[0] = offs;
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}
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msg[1].len = pcnt;
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msg[1].buf = eeprom+tcnt;
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if ((ret = i2c_transfer(&hdw->i2c_adap,
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msg,ARRAY_SIZE(msg))) != 2) {
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pvr2_trace(PVR2_TRACE_ERROR_LEGS,
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"eeprom fetch set offs err=%d",ret);
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kfree(eeprom);
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return NULL;
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}
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}
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return eeprom;
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}
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/* Directly call eeprom analysis function within tveeprom. */
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int pvr2_eeprom_analyze(struct pvr2_hdw *hdw)
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{
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u8 *eeprom;
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struct tveeprom tvdata;
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memset(&tvdata,0,sizeof(tvdata));
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eeprom = pvr2_eeprom_fetch(hdw);
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if (!eeprom)
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return -EINVAL;
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tveeprom_hauppauge_analog(&tvdata, eeprom);
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trace_eeprom("eeprom assumed v4l tveeprom module");
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trace_eeprom("eeprom direct call results:");
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trace_eeprom("has_radio=%d",tvdata.has_radio);
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trace_eeprom("tuner_type=%d",tvdata.tuner_type);
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trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats);
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trace_eeprom("audio_processor=%d",tvdata.audio_processor);
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trace_eeprom("model=%d",tvdata.model);
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trace_eeprom("revision=%d",tvdata.revision);
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trace_eeprom("serial_number=%d",tvdata.serial_number);
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trace_eeprom("rev_str=%s",tvdata.rev_str);
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hdw->tuner_type = tvdata.tuner_type;
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hdw->tuner_updated = !0;
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hdw->serial_number = tvdata.serial_number;
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hdw->std_mask_eeprom = tvdata.tuner_formats;
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kfree(eeprom);
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return 0;
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}
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