diff options
Diffstat (limited to 'drivers/media/usb/pvrusb2/pvrusb2-eeprom.c')
| -rw-r--r-- | drivers/media/usb/pvrusb2/pvrusb2-eeprom.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-eeprom.c b/drivers/media/usb/pvrusb2/pvrusb2-eeprom.c new file mode 100644 index 000000000..8b643d511 --- /dev/null +++ b/drivers/media/usb/pvrusb2/pvrusb2-eeprom.c @@ -0,0 +1,144 @@ +/* + * + * + * Copyright (C) 2005 Mike Isely <isely@pobox.com> + * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/slab.h> +#include "pvrusb2-eeprom.h" +#include "pvrusb2-hdw-internal.h" +#include "pvrusb2-debug.h" + +#define trace_eeprom(...) pvr2_trace(PVR2_TRACE_EEPROM,__VA_ARGS__) + + + +/* + + Read and analyze data in the eeprom. Use tveeprom to figure out + the packet structure, since this is another Hauppauge device and + internally it has a family resemblance to ivtv-type devices + +*/ + +#include <media/tveeprom.h> + +/* We seem to only be interested in the last 128 bytes of the EEPROM */ +#define EEPROM_SIZE 128 + +/* Grab EEPROM contents, needed for direct method. */ +static u8 *pvr2_eeprom_fetch(struct pvr2_hdw *hdw) +{ + struct i2c_msg msg[2]; + u8 *eeprom; + u8 iadd[2]; + u8 addr; + u16 eepromSize; + unsigned int offs; + int ret; + int mode16 = 0; + unsigned pcnt,tcnt; + eeprom = kmalloc(EEPROM_SIZE,GFP_KERNEL); + if (!eeprom) { + pvr2_trace(PVR2_TRACE_ERROR_LEGS, + "Failed to allocate memory required to read eeprom"); + return NULL; + } + + trace_eeprom("Value for eeprom addr from controller was 0x%x", + hdw->eeprom_addr); + addr = hdw->eeprom_addr; + /* Seems that if the high bit is set, then the *real* eeprom + address is shifted right now bit position (noticed this in + newer PVR USB2 hardware) */ + if (addr & 0x80) addr >>= 1; + + /* FX2 documentation states that a 16bit-addressed eeprom is + expected if the I2C address is an odd number (yeah, this is + strange but it's what they do) */ + mode16 = (addr & 1); + eepromSize = (mode16 ? 4096 : 256); + trace_eeprom("Examining %d byte eeprom at location 0x%x using %d bit addressing", + eepromSize, addr, + mode16 ? 16 : 8); + + msg[0].addr = addr; + msg[0].flags = 0; + msg[0].len = mode16 ? 2 : 1; + msg[0].buf = iadd; + msg[1].addr = addr; + msg[1].flags = I2C_M_RD; + + /* We have to do the actual eeprom data fetch ourselves, because + (1) we're only fetching part of the eeprom, and (2) if we were + getting the whole thing our I2C driver can't grab it in one + pass - which is what tveeprom is otherwise going to attempt */ + memset(eeprom,0,EEPROM_SIZE); + for (tcnt = 0; tcnt < EEPROM_SIZE; tcnt += pcnt) { + pcnt = 16; + if (pcnt + tcnt > EEPROM_SIZE) pcnt = EEPROM_SIZE-tcnt; + offs = tcnt + (eepromSize - EEPROM_SIZE); + if (mode16) { + iadd[0] = offs >> 8; + iadd[1] = offs; + } else { + iadd[0] = offs; + } + msg[1].len = pcnt; + msg[1].buf = eeprom+tcnt; + if ((ret = i2c_transfer(&hdw->i2c_adap, + msg,ARRAY_SIZE(msg))) != 2) { + pvr2_trace(PVR2_TRACE_ERROR_LEGS, + "eeprom fetch set offs err=%d",ret); + kfree(eeprom); + return NULL; + } + } + return eeprom; +} + + +/* Directly call eeprom analysis function within tveeprom. */ +int pvr2_eeprom_analyze(struct pvr2_hdw *hdw) +{ + u8 *eeprom; + struct tveeprom tvdata; + + memset(&tvdata,0,sizeof(tvdata)); + + eeprom = pvr2_eeprom_fetch(hdw); + if (!eeprom) + return -EINVAL; + + tveeprom_hauppauge_analog(&tvdata, eeprom); + + trace_eeprom("eeprom assumed v4l tveeprom module"); + trace_eeprom("eeprom direct call results:"); + trace_eeprom("has_radio=%d",tvdata.has_radio); + trace_eeprom("tuner_type=%d",tvdata.tuner_type); + trace_eeprom("tuner_formats=0x%x",tvdata.tuner_formats); + trace_eeprom("audio_processor=%d",tvdata.audio_processor); + trace_eeprom("model=%d",tvdata.model); + trace_eeprom("revision=%d",tvdata.revision); + trace_eeprom("serial_number=%d",tvdata.serial_number); + trace_eeprom("rev_str=%s",tvdata.rev_str); + hdw->tuner_type = tvdata.tuner_type; + hdw->tuner_updated = !0; + hdw->serial_number = tvdata.serial_number; + hdw->std_mask_eeprom = tvdata.tuner_formats; + + kfree(eeprom); + + return 0; +} |