Brooktree driver ported to the new I2C framework. See iicbus(4) for more info.
This commit is contained in:
Nicolas Souchu
parent
206b85750f
commit
fbd78b40dd
@ -1,4 +1,4 @@
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/* $Id$ */
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/* $Id: brooktree848.c,v 1.56 1998/10/01 09:35:48 sos Exp $ */
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/* BT848 Driver for Brooktree's Bt848 based cards.
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The Brooktree BT848 Driver driver is based upon Mark Tinguely and
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Jim Lowe's driver for the Matrox Meteor PCI card . The
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@ -353,7 +353,13 @@
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#include <machine/ioctl_meteor.h>
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#include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
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#include <sys/bus.h>
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#include <pci/brktree_reg.h>
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#include <pci/bt848_i2c.h>
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#include <dev/smbus/smbconf.h>
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#include <dev/iicbus/iiconf.h>
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#include "smbus_if.h"
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#include "iicbus_if.h"
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#include <sys/sysctl.h>
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static int bt848_card = -1;
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static int bt848_tuner = -1;
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@ -1117,6 +1123,7 @@ static int readEEProm( bktr_ptr_t bktr, int offset, int count,
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#ifdef __FreeBSD__
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/*
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* the boot time probe routine.
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*/
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@ -1139,8 +1146,6 @@ bktr_probe( pcici_t tag, pcidi_t type )
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#endif /* __FreeBSD__ */
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/*
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* the attach routine.
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*/
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@ -1173,6 +1178,9 @@ bktr_attach( ATTACH_ARGS )
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fun = pci_conf_read(tag, 0x40);
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pci_conf_write(tag, 0x40, fun | 1);
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/* XXX call bt848_i2c dependent attach() routine */
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if (bt848_i2c_attach(unit, bktr->base, &bktr->i2c_sc))
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printf("bktr%d: i2c_attach: can't attach\n", unit);
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#ifdef BROOKTREE_IRQ /* from the configuration file */
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old_irq = pci_conf_read(tag, PCI_INTERRUPT_REG);
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@ -4161,6 +4169,55 @@ static int oformat_meteor_to_bt( u_long format )
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BT848_DATA_CTL_I2CSCL | \
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BT848_DATA_CTL_I2CSDA)
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#if defined(__FreeBSD__)
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/*
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* The hardware interface is actually SMB commands
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*/
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static int
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i2cWrite( bktr_ptr_t bktr, int addr, int byte1, int byte2 )
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{
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char cmd;
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if (bktr->id == BROOKTREE_848_ID ||
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bktr->id == BROOKTREE_849_ID)
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cmd = I2C_COMMAND;
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else
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cmd = I2C_COMMAND_878;
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if (byte2 != -1) {
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if (smbus_writew(bktr->i2c_sc.smbus, addr, cmd,
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(short)(((byte2 & 0xff) << 8) | (byte1 & 0xff))))
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return (-1);
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} else {
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if (smbus_writeb(bktr->i2c_sc.smbus, addr, cmd,
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(char)(byte1 & 0xff)))
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return (-1);
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}
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/* return OK */
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return( 0 );
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}
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static int
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i2cRead( bktr_ptr_t bktr, int addr )
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{
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char result;
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char cmd;
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if (bktr->id == BROOKTREE_848_ID ||
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bktr->id == BROOKTREE_849_ID)
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cmd = I2C_COMMAND;
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else
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cmd = I2C_COMMAND_878;
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if (smbus_readb(bktr->i2c_sc.smbus, addr, cmd, &result))
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return (-1);
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return ((int)result);
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}
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#else /* defined(__FreeBSD__) */
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/*
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*
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@ -4245,6 +4302,8 @@ i2cRead( bktr_ptr_t bktr, int addr )
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return( (bt848->i2c_data_ctl >> 8) & 0xff );
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}
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#endif /* !define(__FreeBSD__) */
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#if defined( I2C_SOFTWARE_PROBE )
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/*
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@ -4361,6 +4420,18 @@ readEEProm( bktr_ptr_t bktr, int offset, int count, u_char *data )
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return( 0 );
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}
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#define ABSENT (-1)
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static int
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probeDevice(bktr_ptr_t bktr, u_char addr)
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{
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int read;
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read = i2cRead( bktr, addr);
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if (read == ABSENT || read == 0)
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return (0);
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return (1);
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}
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/*
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* get a signature of the card
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* read all 128 possible i2c read addresses from 0x01 thru 0xff
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@ -4368,7 +4439,6 @@ readEEProm( bktr_ptr_t bktr, int offset, int count, u_char *data )
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*
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* XXX FIXME: use offset & count args
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*/
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#define ABSENT (-1)
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static int
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signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
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{
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@ -4378,9 +4448,8 @@ signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
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sig[ x ] = 0;
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for ( x = 0; x < count; ++x ) {
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if ( i2cRead( bktr, (2 * x) + 1 ) != ABSENT ) {
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if (probeDevice(bktr, (u_char)(2 * x + 1)))
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sig[ x / 8 ] |= (1 << (x % 8) );
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}
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}
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return( 0 );
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@ -4399,17 +4468,12 @@ signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
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* (eg VideoLogic Captivator PCI rev. 2F with BT848A)
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*/
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static int check_for_i2c_devices( bktr_ptr_t bktr ){
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int x, temp_read;
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int i2c_all_0 = 1;
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int i2c_all_absent = 1;
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int x;
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for ( x = 0; x < 128; ++x ) {
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temp_read = i2cRead( bktr, (2 * x) + 1 );
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if (temp_read != 0) i2c_all_0 = 0;
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if (temp_read != ABSENT) i2c_all_absent = 0;
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if (probeDevice(bktr, (u_char)(2 * x + 1)))
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return (1);
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}
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if ((i2c_all_0) || (i2c_all_absent)) return 0;
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else return 1;
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return (0);
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}
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/*
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@ -4424,8 +4488,6 @@ static int locate_tuner_address( bktr_ptr_t bktr) {
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if (i2cRead( bktr, 0xc7) != ABSENT) return 0xc6;
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return -1; /* no tuner found */
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}
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#undef ABSENT
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/*
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* determine the card brand/model
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@ -4433,7 +4495,6 @@ static int locate_tuner_address( bktr_ptr_t bktr) {
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* can be used to select a specific device, regardless of the
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* autodetection and i2c device checks.
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*/
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#define ABSENT (-1)
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static void
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probeCard( bktr_ptr_t bktr, int verbose )
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{
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@ -4447,6 +4508,9 @@ probeCard( bktr_ptr_t bktr, int verbose )
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int tuner_i2c_address = -1;
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any_i2c_devices = check_for_i2c_devices( bktr );
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if (bootverbose)
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if (!any_i2c_devices)
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printf("bktr: no I2C device found!\n");
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bt848 = bktr->base;
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bt848->gpio_out_en = 0;
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412
sys/dev/bktr/bktr_i2c.c
Normal file
412
sys/dev/bktr/bktr_i2c.c
Normal file
@ -0,0 +1,412 @@
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/*-
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* Copyright (c) 1998 Nicolas Souchu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*
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*/
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/*
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* I2C support for the bti2c chipset.
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*
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* From brooktree848.c <fsmp@freefall.org>
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/buf.h>
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#include <sys/uio.h>
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#include <sys/malloc.h>
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#include <machine/clock.h>
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#include <pci/pcivar.h>
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#include <pci/pcireg.h>
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#include <machine/ioctl_meteor.h>
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#include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
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#include <pci/brktree_reg.h>
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#include <pci/bt848_i2c.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/smbus/smbconf.h>
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#include "iicbb_if.h"
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#include "smbus_if.h"
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#include "pci.h"
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#include "bktr.h"
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#if (NBKTR > 0 && NPCI > 0)
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#define I2C_DELAY 40
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#define BTI2C_DEBUG(x) if (bti2c_debug) (x)
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static int bti2c_debug = 0;
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struct bti2c_softc {
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bt848_ptr_t base;
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int iic_owned; /* 1 if we own the iicbus */
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int smb_owned; /* 1 if we own the smbbus */
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device_t smbus;
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device_t iicbus;
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};
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struct bt_data {
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bt848_ptr_t base;
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};
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struct bt_data btdata[NBKTR];
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static int bti2c_probe(device_t);
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static int bti2c_attach(device_t);
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static void bti2c_print_child(device_t, device_t);
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static int bti2c_iic_callback(device_t, int, caddr_t *);
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static void bti2c_iic_setlines(device_t, int, int);
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static int bti2c_iic_getdataline(device_t);
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static int bti2c_iic_reset(device_t, u_char, u_char, u_char *);
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static int bti2c_smb_callback(device_t, int, caddr_t *);
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static int bti2c_smb_writeb(device_t dev, u_char slave, char cmd, char byte);
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static int bti2c_smb_writew(device_t dev, u_char slave, char cmd, short word);
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static int bti2c_smb_readb(device_t dev, u_char slave, char cmd, char *byte);
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static devclass_t bti2c_devclass;
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static device_method_t bti2c_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, bti2c_probe),
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DEVMETHOD(device_attach, bti2c_attach),
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/* bus interface */
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DEVMETHOD(bus_print_child, bti2c_print_child),
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/* iicbb interface */
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DEVMETHOD(iicbb_callback, bti2c_iic_callback),
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DEVMETHOD(iicbb_setlines, bti2c_iic_setlines),
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DEVMETHOD(iicbb_getdataline, bti2c_iic_getdataline),
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DEVMETHOD(iicbb_reset, bti2c_iic_reset),
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/* smbus interface */
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DEVMETHOD(smbus_callback, bti2c_smb_callback),
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DEVMETHOD(smbus_writeb, bti2c_smb_writeb),
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DEVMETHOD(smbus_writew, bti2c_smb_writew),
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DEVMETHOD(smbus_readb, bti2c_smb_readb),
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{ 0, 0 }
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};
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static driver_t bti2c_driver = {
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"bti2c",
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bti2c_methods,
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DRIVER_TYPE_MISC,
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sizeof(struct bti2c_softc),
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};
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/*
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* Call this to pass the base address of the bktr device to the
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* bti2c_i2c layer and initialize all the I2C bus architecture
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*/
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int
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bt848_i2c_attach(int unit, bt848_ptr_t base, struct bktr_i2c_softc *i2c_sc)
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{
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device_t interface;
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device_t bitbang;
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btdata[unit].base = base;
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/* XXX add the I2C interface to the root_bus until pcibus is ready */
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interface = device_add_child(root_bus, "bti2c", unit, NULL);
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/* add bit-banging generic code onto bti2c interface */
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bitbang = device_add_child(interface, "iicbb", -1, NULL);
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/* probe and attach the interface, we need it NOW
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* bit-banging code is also probed and attached */
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device_probe_and_attach(interface);
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device_probe_and_attach(bitbang);
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/* smb and i2c interfaces are available for the bt848 chip
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* connect bit-banging generic code to an iicbus */
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if ((i2c_sc->iicbus = iicbus_alloc_bus(bitbang)))
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device_probe_and_attach(i2c_sc->iicbus);
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/* hardware i2c is actually smb over the bti2c interface */
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if ((i2c_sc->smbus = smbus_alloc_bus(interface)))
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device_probe_and_attach(i2c_sc->smbus);
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return (0);
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};
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/*
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* Not a real probe, we know the device exists since the device has
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* been added after the successfull pci probe.
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*/
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static int
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bti2c_probe(device_t dev)
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{
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device_set_desc(dev, "bt848 Hard/Soft I2C controller");
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return (0);
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}
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static int
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bti2c_attach(device_t dev)
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{
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struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
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/* XXX should use ivars with pcibus or pcibus methods to access
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* onboard memory */
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sc->base = btdata[device_get_unit(dev)].base;
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return (0);
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}
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static void
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bti2c_print_child(device_t bus, device_t dev)
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{
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printf(" on %s%d", device_get_name(bus), device_get_unit(bus));
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return;
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}
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static int
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bti2c_smb_callback(device_t dev, int index, caddr_t *data)
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{
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struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
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int error = 0;
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int how;
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/* test each time if we already have/haven't the iicbus
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* to avoid deadlocks
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*/
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switch (index) {
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case SMB_REQUEST_BUS:
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if (!sc->iic_owned) {
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/* request the iicbus */
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how = *(int *)data;
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error = iicbus_request_bus(sc->iicbus, dev, how);
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if (!error)
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sc->iic_owned = 1;
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}
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break;
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case SMB_RELEASE_BUS:
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if (sc->iic_owned) {
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/* release the iicbus */
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error = iicbus_release_bus(sc->iicbus, dev);
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if (!error)
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sc->iic_owned = 0;
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}
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break;
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default:
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error = EINVAL;
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}
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return (error);
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}
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static int
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bti2c_iic_callback(device_t dev, int index, caddr_t *data)
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{
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struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
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int error = 0;
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int how;
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/* test each time if we already have/haven't the smbus
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* to avoid deadlocks
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*/
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switch (index) {
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case IIC_REQUEST_BUS:
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if (!sc->smb_owned) {
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/* request the smbus */
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how = *(int *)data;
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error = smbus_request_bus(sc->smbus, dev, how);
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if (!error)
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sc->smb_owned = 1;
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}
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||||
break;
|
||||
|
||||
case IIC_RELEASE_BUS:
|
||||
if (sc->smb_owned) {
|
||||
/* release the smbus */
|
||||
error = smbus_release_bus(sc->smbus, dev);
|
||||
if (!error)
|
||||
sc->smb_owned = 0;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_iic_reset(device_t dev, u_char speed, u_char addr, u_char * oldaddr)
|
||||
{
|
||||
if (oldaddr)
|
||||
*oldaddr = 0; /* XXX */
|
||||
|
||||
return (IIC_ENOADDR);
|
||||
}
|
||||
|
||||
static void
|
||||
bti2c_iic_setlines(device_t dev, int ctrl, int data)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
bti2c->i2c_data_ctl = (ctrl << 1) | data;
|
||||
DELAY(I2C_DELAY);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_iic_getdataline(device_t dev)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
return (bti2c->i2c_data_ctl & 0x1);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_write(bt848_ptr_t bti2c, u_long data)
|
||||
{
|
||||
u_long x;
|
||||
|
||||
/* clear status bits */
|
||||
bti2c->int_stat = (BT848_INT_RACK | BT848_INT_I2CDONE);
|
||||
|
||||
BTI2C_DEBUG(printf("w%lx", data));
|
||||
|
||||
/* write the address and data */
|
||||
bti2c->i2c_data_ctl = data;
|
||||
|
||||
/* wait for completion */
|
||||
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
||||
if ( bti2c->int_stat & BT848_INT_I2CDONE )
|
||||
break;
|
||||
}
|
||||
|
||||
/* check for ACK */
|
||||
if ( !x || !(bti2c->int_stat & BT848_INT_RACK) ) {
|
||||
BTI2C_DEBUG(printf("%c%c", (!x)?'+':'-',
|
||||
(!(bti2c->int_stat & BT848_INT_RACK))?'+':'-'));
|
||||
return (SMB_ENOACK);
|
||||
}
|
||||
BTI2C_DEBUG(printf("+"));
|
||||
|
||||
/* return OK */
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_smb_writeb(device_t dev, u_char slave, char cmd, char byte)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
u_long data;
|
||||
|
||||
data = ((slave & 0xff) << 24) | ((byte & 0xff) << 16) | cmd;
|
||||
|
||||
return (bti2c_write(sc->base, data));
|
||||
}
|
||||
|
||||
/*
|
||||
* byte1 becomes low byte of word
|
||||
* byte2 becomes high byte of word
|
||||
*/
|
||||
static int
|
||||
bti2c_smb_writew(device_t dev, u_char slave, char cmd, short word)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
u_long data;
|
||||
char low, high;
|
||||
|
||||
low = (char)(word & 0xff);
|
||||
high = (char)((word & 0xff00) >> 8);
|
||||
|
||||
data = ((slave & 0xff) << 24) | ((low & 0xff) << 16) |
|
||||
((high & 0xff) << 8) | BT848_DATA_CTL_I2CW3B | cmd;
|
||||
|
||||
return (bti2c_write(sc->base, data));
|
||||
}
|
||||
|
||||
/*
|
||||
* The Bt878 and Bt879 differed on the treatment of i2c commands
|
||||
*/
|
||||
static int
|
||||
bti2c_smb_readb(device_t dev, u_char slave, char cmd, char *byte)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
u_long x;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
/* clear status bits */
|
||||
bti2c->int_stat = (BT848_INT_RACK | BT848_INT_I2CDONE);
|
||||
|
||||
bti2c->i2c_data_ctl = ((slave & 0xff) << 24) | cmd;
|
||||
|
||||
BTI2C_DEBUG(printf("r%lx/", (u_long)(((slave & 0xff) << 24) | cmd)));
|
||||
|
||||
/* wait for completion */
|
||||
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
||||
if ( bti2c->int_stat & BT848_INT_I2CDONE )
|
||||
break;
|
||||
}
|
||||
|
||||
/* check for ACK */
|
||||
if ( !x || !(bti2c->int_stat & BT848_INT_RACK) ) {
|
||||
BTI2C_DEBUG(printf("r%c%c", (!x)?'+':'-',
|
||||
(!(bti2c->int_stat & BT848_INT_RACK))?'+':'-'));
|
||||
return (SMB_ENOACK);
|
||||
}
|
||||
|
||||
*byte = (char)((bti2c->i2c_data_ctl >> 8) & 0xff);
|
||||
BTI2C_DEBUG(printf("r%x+", *byte));
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
DRIVER_MODULE(bti2c, root, bti2c_driver, bti2c_devclass, 0, 0);
|
||||
#endif
|
||||
34
sys/dev/bktr/bktr_i2c.h
Normal file
34
sys/dev/bktr/bktr_i2c.h
Normal file
@ -0,0 +1,34 @@
|
||||
/*-
|
||||
* Copyright (c) 1998 Nicolas Souchu
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
*
|
||||
*/
|
||||
#ifndef _BT848_I2C_H
|
||||
#define _BT848_I2C_H
|
||||
|
||||
extern int bt848_i2c_attach(int, bt848_ptr_t, struct bktr_i2c_softc *);
|
||||
|
||||
#endif
|
||||
@ -28,7 +28,7 @@
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
* $Id: brktree_reg.h,v 1.22 1998/09/30 21:06:54 sos Exp $
|
||||
*/
|
||||
#ifndef PCI_LATENCY_TIMER
|
||||
#define PCI_LATENCY_TIMER 0x0c /* pci timer register */
|
||||
@ -369,6 +369,12 @@ struct format_params {
|
||||
int iform_xtsel;
|
||||
};
|
||||
|
||||
#ifdef __FreeBSD__
|
||||
struct bktr_i2c_softc {
|
||||
device_t iicbus;
|
||||
device_t smbus;
|
||||
};
|
||||
#endif
|
||||
|
||||
typedef struct bktr_clip bktr_clip_t;
|
||||
/*
|
||||
@ -380,6 +386,9 @@ struct bktr_softc {
|
||||
struct isadev bktr_id; /* ISA device */
|
||||
struct intrhand bktr_ih; /* interrupt vectoring */
|
||||
#define pcici_t pci_devaddr_t
|
||||
#endif
|
||||
#ifdef __FreeBSD__
|
||||
struct bktr_i2c_softc i2c_sc; /* bt848_i2c device */
|
||||
#endif
|
||||
bt848_ptr_t base; /* Bt848 register physical address */
|
||||
vm_offset_t phys_base; /* Bt848 register physical address */
|
||||
|
||||
@ -28,7 +28,7 @@
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
* $Id: brktree_reg.h,v 1.22 1998/09/30 21:06:54 sos Exp $
|
||||
*/
|
||||
#ifndef PCI_LATENCY_TIMER
|
||||
#define PCI_LATENCY_TIMER 0x0c /* pci timer register */
|
||||
@ -369,6 +369,12 @@ struct format_params {
|
||||
int iform_xtsel;
|
||||
};
|
||||
|
||||
#ifdef __FreeBSD__
|
||||
struct bktr_i2c_softc {
|
||||
device_t iicbus;
|
||||
device_t smbus;
|
||||
};
|
||||
#endif
|
||||
|
||||
typedef struct bktr_clip bktr_clip_t;
|
||||
/*
|
||||
@ -380,6 +386,9 @@ struct bktr_softc {
|
||||
struct isadev bktr_id; /* ISA device */
|
||||
struct intrhand bktr_ih; /* interrupt vectoring */
|
||||
#define pcici_t pci_devaddr_t
|
||||
#endif
|
||||
#ifdef __FreeBSD__
|
||||
struct bktr_i2c_softc i2c_sc; /* bt848_i2c device */
|
||||
#endif
|
||||
bt848_ptr_t base; /* Bt848 register physical address */
|
||||
vm_offset_t phys_base; /* Bt848 register physical address */
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
/* $Id$ */
|
||||
/* $Id: brooktree848.c,v 1.56 1998/10/01 09:35:48 sos Exp $ */
|
||||
/* BT848 Driver for Brooktree's Bt848 based cards.
|
||||
The Brooktree BT848 Driver driver is based upon Mark Tinguely and
|
||||
Jim Lowe's driver for the Matrox Meteor PCI card . The
|
||||
@ -353,7 +353,13 @@
|
||||
|
||||
#include <machine/ioctl_meteor.h>
|
||||
#include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
|
||||
#include <sys/bus.h>
|
||||
#include <pci/brktree_reg.h>
|
||||
#include <pci/bt848_i2c.h>
|
||||
#include <dev/smbus/smbconf.h>
|
||||
#include <dev/iicbus/iiconf.h>
|
||||
#include "smbus_if.h"
|
||||
#include "iicbus_if.h"
|
||||
#include <sys/sysctl.h>
|
||||
static int bt848_card = -1;
|
||||
static int bt848_tuner = -1;
|
||||
@ -1117,6 +1123,7 @@ static int readEEProm( bktr_ptr_t bktr, int offset, int count,
|
||||
|
||||
|
||||
#ifdef __FreeBSD__
|
||||
|
||||
/*
|
||||
* the boot time probe routine.
|
||||
*/
|
||||
@ -1139,8 +1146,6 @@ bktr_probe( pcici_t tag, pcidi_t type )
|
||||
#endif /* __FreeBSD__ */
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
* the attach routine.
|
||||
*/
|
||||
@ -1173,6 +1178,9 @@ bktr_attach( ATTACH_ARGS )
|
||||
fun = pci_conf_read(tag, 0x40);
|
||||
pci_conf_write(tag, 0x40, fun | 1);
|
||||
|
||||
/* XXX call bt848_i2c dependent attach() routine */
|
||||
if (bt848_i2c_attach(unit, bktr->base, &bktr->i2c_sc))
|
||||
printf("bktr%d: i2c_attach: can't attach\n", unit);
|
||||
|
||||
#ifdef BROOKTREE_IRQ /* from the configuration file */
|
||||
old_irq = pci_conf_read(tag, PCI_INTERRUPT_REG);
|
||||
@ -4161,6 +4169,55 @@ static int oformat_meteor_to_bt( u_long format )
|
||||
BT848_DATA_CTL_I2CSCL | \
|
||||
BT848_DATA_CTL_I2CSDA)
|
||||
|
||||
#if defined(__FreeBSD__)
|
||||
|
||||
/*
|
||||
* The hardware interface is actually SMB commands
|
||||
*/
|
||||
static int
|
||||
i2cWrite( bktr_ptr_t bktr, int addr, int byte1, int byte2 )
|
||||
{
|
||||
char cmd;
|
||||
|
||||
if (bktr->id == BROOKTREE_848_ID ||
|
||||
bktr->id == BROOKTREE_849_ID)
|
||||
cmd = I2C_COMMAND;
|
||||
else
|
||||
cmd = I2C_COMMAND_878;
|
||||
|
||||
if (byte2 != -1) {
|
||||
if (smbus_writew(bktr->i2c_sc.smbus, addr, cmd,
|
||||
(short)(((byte2 & 0xff) << 8) | (byte1 & 0xff))))
|
||||
return (-1);
|
||||
} else {
|
||||
if (smbus_writeb(bktr->i2c_sc.smbus, addr, cmd,
|
||||
(char)(byte1 & 0xff)))
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* return OK */
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static int
|
||||
i2cRead( bktr_ptr_t bktr, int addr )
|
||||
{
|
||||
char result;
|
||||
char cmd;
|
||||
|
||||
if (bktr->id == BROOKTREE_848_ID ||
|
||||
bktr->id == BROOKTREE_849_ID)
|
||||
cmd = I2C_COMMAND;
|
||||
else
|
||||
cmd = I2C_COMMAND_878;
|
||||
|
||||
if (smbus_readb(bktr->i2c_sc.smbus, addr, cmd, &result))
|
||||
return (-1);
|
||||
|
||||
return ((int)result);
|
||||
}
|
||||
|
||||
#else /* defined(__FreeBSD__) */
|
||||
|
||||
/*
|
||||
*
|
||||
@ -4245,6 +4302,8 @@ i2cRead( bktr_ptr_t bktr, int addr )
|
||||
return( (bt848->i2c_data_ctl >> 8) & 0xff );
|
||||
}
|
||||
|
||||
#endif /* !define(__FreeBSD__) */
|
||||
|
||||
#if defined( I2C_SOFTWARE_PROBE )
|
||||
|
||||
/*
|
||||
@ -4361,6 +4420,18 @@ readEEProm( bktr_ptr_t bktr, int offset, int count, u_char *data )
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
#define ABSENT (-1)
|
||||
static int
|
||||
probeDevice(bktr_ptr_t bktr, u_char addr)
|
||||
{
|
||||
int read;
|
||||
read = i2cRead( bktr, addr);
|
||||
if (read == ABSENT || read == 0)
|
||||
return (0);
|
||||
|
||||
return (1);
|
||||
}
|
||||
|
||||
/*
|
||||
* get a signature of the card
|
||||
* read all 128 possible i2c read addresses from 0x01 thru 0xff
|
||||
@ -4368,7 +4439,6 @@ readEEProm( bktr_ptr_t bktr, int offset, int count, u_char *data )
|
||||
*
|
||||
* XXX FIXME: use offset & count args
|
||||
*/
|
||||
#define ABSENT (-1)
|
||||
static int
|
||||
signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
|
||||
{
|
||||
@ -4378,9 +4448,8 @@ signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
|
||||
sig[ x ] = 0;
|
||||
|
||||
for ( x = 0; x < count; ++x ) {
|
||||
if ( i2cRead( bktr, (2 * x) + 1 ) != ABSENT ) {
|
||||
if (probeDevice(bktr, (u_char)(2 * x + 1)))
|
||||
sig[ x / 8 ] |= (1 << (x % 8) );
|
||||
}
|
||||
}
|
||||
|
||||
return( 0 );
|
||||
@ -4399,17 +4468,12 @@ signCard( bktr_ptr_t bktr, int offset, int count, u_char* sig )
|
||||
* (eg VideoLogic Captivator PCI rev. 2F with BT848A)
|
||||
*/
|
||||
static int check_for_i2c_devices( bktr_ptr_t bktr ){
|
||||
int x, temp_read;
|
||||
int i2c_all_0 = 1;
|
||||
int i2c_all_absent = 1;
|
||||
int x;
|
||||
for ( x = 0; x < 128; ++x ) {
|
||||
temp_read = i2cRead( bktr, (2 * x) + 1 );
|
||||
if (temp_read != 0) i2c_all_0 = 0;
|
||||
if (temp_read != ABSENT) i2c_all_absent = 0;
|
||||
if (probeDevice(bktr, (u_char)(2 * x + 1)))
|
||||
return (1);
|
||||
}
|
||||
|
||||
if ((i2c_all_0) || (i2c_all_absent)) return 0;
|
||||
else return 1;
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -4424,8 +4488,6 @@ static int locate_tuner_address( bktr_ptr_t bktr) {
|
||||
if (i2cRead( bktr, 0xc7) != ABSENT) return 0xc6;
|
||||
return -1; /* no tuner found */
|
||||
}
|
||||
|
||||
#undef ABSENT
|
||||
|
||||
/*
|
||||
* determine the card brand/model
|
||||
@ -4433,7 +4495,6 @@ static int locate_tuner_address( bktr_ptr_t bktr) {
|
||||
* can be used to select a specific device, regardless of the
|
||||
* autodetection and i2c device checks.
|
||||
*/
|
||||
#define ABSENT (-1)
|
||||
static void
|
||||
probeCard( bktr_ptr_t bktr, int verbose )
|
||||
{
|
||||
@ -4447,6 +4508,9 @@ probeCard( bktr_ptr_t bktr, int verbose )
|
||||
int tuner_i2c_address = -1;
|
||||
|
||||
any_i2c_devices = check_for_i2c_devices( bktr );
|
||||
if (bootverbose)
|
||||
if (!any_i2c_devices)
|
||||
printf("bktr: no I2C device found!\n");
|
||||
bt848 = bktr->base;
|
||||
|
||||
bt848->gpio_out_en = 0;
|
||||
|
||||
412
sys/pci/bt848_i2c.c
Normal file
412
sys/pci/bt848_i2c.c
Normal file
@ -0,0 +1,412 @@
|
||||
/*-
|
||||
* Copyright (c) 1998 Nicolas Souchu
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
*
|
||||
*/
|
||||
|
||||
/*
|
||||
* I2C support for the bti2c chipset.
|
||||
*
|
||||
* From brooktree848.c <fsmp@freefall.org>
|
||||
*/
|
||||
|
||||
#include <sys/param.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/module.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/conf.h>
|
||||
#include <sys/buf.h>
|
||||
#include <sys/uio.h>
|
||||
#include <sys/malloc.h>
|
||||
|
||||
#include <machine/clock.h>
|
||||
|
||||
#include <pci/pcivar.h>
|
||||
#include <pci/pcireg.h>
|
||||
#include <machine/ioctl_meteor.h>
|
||||
#include <machine/ioctl_bt848.h> /* extensions to ioctl_meteor.h */
|
||||
#include <pci/brktree_reg.h>
|
||||
|
||||
#include <pci/bt848_i2c.h>
|
||||
|
||||
#include <dev/iicbus/iiconf.h>
|
||||
#include <dev/iicbus/iicbus.h>
|
||||
|
||||
#include <dev/smbus/smbconf.h>
|
||||
|
||||
#include "iicbb_if.h"
|
||||
#include "smbus_if.h"
|
||||
|
||||
#include "pci.h"
|
||||
#include "bktr.h"
|
||||
|
||||
#if (NBKTR > 0 && NPCI > 0)
|
||||
|
||||
#define I2C_DELAY 40
|
||||
|
||||
#define BTI2C_DEBUG(x) if (bti2c_debug) (x)
|
||||
static int bti2c_debug = 0;
|
||||
|
||||
struct bti2c_softc {
|
||||
|
||||
bt848_ptr_t base;
|
||||
|
||||
int iic_owned; /* 1 if we own the iicbus */
|
||||
int smb_owned; /* 1 if we own the smbbus */
|
||||
|
||||
device_t smbus;
|
||||
device_t iicbus;
|
||||
};
|
||||
|
||||
struct bt_data {
|
||||
bt848_ptr_t base;
|
||||
};
|
||||
struct bt_data btdata[NBKTR];
|
||||
|
||||
static int bti2c_probe(device_t);
|
||||
static int bti2c_attach(device_t);
|
||||
static void bti2c_print_child(device_t, device_t);
|
||||
|
||||
static int bti2c_iic_callback(device_t, int, caddr_t *);
|
||||
static void bti2c_iic_setlines(device_t, int, int);
|
||||
static int bti2c_iic_getdataline(device_t);
|
||||
static int bti2c_iic_reset(device_t, u_char, u_char, u_char *);
|
||||
|
||||
static int bti2c_smb_callback(device_t, int, caddr_t *);
|
||||
static int bti2c_smb_writeb(device_t dev, u_char slave, char cmd, char byte);
|
||||
static int bti2c_smb_writew(device_t dev, u_char slave, char cmd, short word);
|
||||
static int bti2c_smb_readb(device_t dev, u_char slave, char cmd, char *byte);
|
||||
|
||||
static devclass_t bti2c_devclass;
|
||||
|
||||
static device_method_t bti2c_methods[] = {
|
||||
/* device interface */
|
||||
DEVMETHOD(device_probe, bti2c_probe),
|
||||
DEVMETHOD(device_attach, bti2c_attach),
|
||||
|
||||
/* bus interface */
|
||||
DEVMETHOD(bus_print_child, bti2c_print_child),
|
||||
|
||||
/* iicbb interface */
|
||||
DEVMETHOD(iicbb_callback, bti2c_iic_callback),
|
||||
DEVMETHOD(iicbb_setlines, bti2c_iic_setlines),
|
||||
DEVMETHOD(iicbb_getdataline, bti2c_iic_getdataline),
|
||||
DEVMETHOD(iicbb_reset, bti2c_iic_reset),
|
||||
|
||||
/* smbus interface */
|
||||
DEVMETHOD(smbus_callback, bti2c_smb_callback),
|
||||
DEVMETHOD(smbus_writeb, bti2c_smb_writeb),
|
||||
DEVMETHOD(smbus_writew, bti2c_smb_writew),
|
||||
DEVMETHOD(smbus_readb, bti2c_smb_readb),
|
||||
|
||||
{ 0, 0 }
|
||||
};
|
||||
|
||||
static driver_t bti2c_driver = {
|
||||
"bti2c",
|
||||
bti2c_methods,
|
||||
DRIVER_TYPE_MISC,
|
||||
sizeof(struct bti2c_softc),
|
||||
};
|
||||
|
||||
/*
|
||||
* Call this to pass the base address of the bktr device to the
|
||||
* bti2c_i2c layer and initialize all the I2C bus architecture
|
||||
*/
|
||||
int
|
||||
bt848_i2c_attach(int unit, bt848_ptr_t base, struct bktr_i2c_softc *i2c_sc)
|
||||
{
|
||||
device_t interface;
|
||||
device_t bitbang;
|
||||
|
||||
btdata[unit].base = base;
|
||||
|
||||
/* XXX add the I2C interface to the root_bus until pcibus is ready */
|
||||
interface = device_add_child(root_bus, "bti2c", unit, NULL);
|
||||
|
||||
/* add bit-banging generic code onto bti2c interface */
|
||||
bitbang = device_add_child(interface, "iicbb", -1, NULL);
|
||||
|
||||
/* probe and attach the interface, we need it NOW
|
||||
* bit-banging code is also probed and attached */
|
||||
device_probe_and_attach(interface);
|
||||
device_probe_and_attach(bitbang);
|
||||
|
||||
/* smb and i2c interfaces are available for the bt848 chip
|
||||
* connect bit-banging generic code to an iicbus */
|
||||
if ((i2c_sc->iicbus = iicbus_alloc_bus(bitbang)))
|
||||
device_probe_and_attach(i2c_sc->iicbus);
|
||||
|
||||
/* hardware i2c is actually smb over the bti2c interface */
|
||||
if ((i2c_sc->smbus = smbus_alloc_bus(interface)))
|
||||
device_probe_and_attach(i2c_sc->smbus);
|
||||
|
||||
return (0);
|
||||
};
|
||||
|
||||
/*
|
||||
* Not a real probe, we know the device exists since the device has
|
||||
* been added after the successfull pci probe.
|
||||
*/
|
||||
static int
|
||||
bti2c_probe(device_t dev)
|
||||
{
|
||||
device_set_desc(dev, "bt848 Hard/Soft I2C controller");
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_attach(device_t dev)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
|
||||
/* XXX should use ivars with pcibus or pcibus methods to access
|
||||
* onboard memory */
|
||||
sc->base = btdata[device_get_unit(dev)].base;
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
static void
|
||||
bti2c_print_child(device_t bus, device_t dev)
|
||||
{
|
||||
printf(" on %s%d", device_get_name(bus), device_get_unit(bus));
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_smb_callback(device_t dev, int index, caddr_t *data)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
int error = 0;
|
||||
int how;
|
||||
|
||||
/* test each time if we already have/haven't the iicbus
|
||||
* to avoid deadlocks
|
||||
*/
|
||||
switch (index) {
|
||||
case SMB_REQUEST_BUS:
|
||||
if (!sc->iic_owned) {
|
||||
/* request the iicbus */
|
||||
how = *(int *)data;
|
||||
error = iicbus_request_bus(sc->iicbus, dev, how);
|
||||
if (!error)
|
||||
sc->iic_owned = 1;
|
||||
}
|
||||
break;
|
||||
|
||||
case SMB_RELEASE_BUS:
|
||||
if (sc->iic_owned) {
|
||||
/* release the iicbus */
|
||||
error = iicbus_release_bus(sc->iicbus, dev);
|
||||
if (!error)
|
||||
sc->iic_owned = 0;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_iic_callback(device_t dev, int index, caddr_t *data)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
int error = 0;
|
||||
int how;
|
||||
|
||||
/* test each time if we already have/haven't the smbus
|
||||
* to avoid deadlocks
|
||||
*/
|
||||
switch (index) {
|
||||
case IIC_REQUEST_BUS:
|
||||
if (!sc->smb_owned) {
|
||||
/* request the smbus */
|
||||
how = *(int *)data;
|
||||
error = smbus_request_bus(sc->smbus, dev, how);
|
||||
if (!error)
|
||||
sc->smb_owned = 1;
|
||||
}
|
||||
break;
|
||||
|
||||
case IIC_RELEASE_BUS:
|
||||
if (sc->smb_owned) {
|
||||
/* release the smbus */
|
||||
error = smbus_release_bus(sc->smbus, dev);
|
||||
if (!error)
|
||||
sc->smb_owned = 0;
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
error = EINVAL;
|
||||
}
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_iic_reset(device_t dev, u_char speed, u_char addr, u_char * oldaddr)
|
||||
{
|
||||
if (oldaddr)
|
||||
*oldaddr = 0; /* XXX */
|
||||
|
||||
return (IIC_ENOADDR);
|
||||
}
|
||||
|
||||
static void
|
||||
bti2c_iic_setlines(device_t dev, int ctrl, int data)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
bti2c->i2c_data_ctl = (ctrl << 1) | data;
|
||||
DELAY(I2C_DELAY);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_iic_getdataline(device_t dev)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
return (bti2c->i2c_data_ctl & 0x1);
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_write(bt848_ptr_t bti2c, u_long data)
|
||||
{
|
||||
u_long x;
|
||||
|
||||
/* clear status bits */
|
||||
bti2c->int_stat = (BT848_INT_RACK | BT848_INT_I2CDONE);
|
||||
|
||||
BTI2C_DEBUG(printf("w%lx", data));
|
||||
|
||||
/* write the address and data */
|
||||
bti2c->i2c_data_ctl = data;
|
||||
|
||||
/* wait for completion */
|
||||
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
||||
if ( bti2c->int_stat & BT848_INT_I2CDONE )
|
||||
break;
|
||||
}
|
||||
|
||||
/* check for ACK */
|
||||
if ( !x || !(bti2c->int_stat & BT848_INT_RACK) ) {
|
||||
BTI2C_DEBUG(printf("%c%c", (!x)?'+':'-',
|
||||
(!(bti2c->int_stat & BT848_INT_RACK))?'+':'-'));
|
||||
return (SMB_ENOACK);
|
||||
}
|
||||
BTI2C_DEBUG(printf("+"));
|
||||
|
||||
/* return OK */
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static int
|
||||
bti2c_smb_writeb(device_t dev, u_char slave, char cmd, char byte)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
u_long data;
|
||||
|
||||
data = ((slave & 0xff) << 24) | ((byte & 0xff) << 16) | cmd;
|
||||
|
||||
return (bti2c_write(sc->base, data));
|
||||
}
|
||||
|
||||
/*
|
||||
* byte1 becomes low byte of word
|
||||
* byte2 becomes high byte of word
|
||||
*/
|
||||
static int
|
||||
bti2c_smb_writew(device_t dev, u_char slave, char cmd, short word)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
u_long data;
|
||||
char low, high;
|
||||
|
||||
low = (char)(word & 0xff);
|
||||
high = (char)((word & 0xff00) >> 8);
|
||||
|
||||
data = ((slave & 0xff) << 24) | ((low & 0xff) << 16) |
|
||||
((high & 0xff) << 8) | BT848_DATA_CTL_I2CW3B | cmd;
|
||||
|
||||
return (bti2c_write(sc->base, data));
|
||||
}
|
||||
|
||||
/*
|
||||
* The Bt878 and Bt879 differed on the treatment of i2c commands
|
||||
*/
|
||||
static int
|
||||
bti2c_smb_readb(device_t dev, u_char slave, char cmd, char *byte)
|
||||
{
|
||||
struct bti2c_softc *sc = (struct bti2c_softc *)device_get_softc(dev);
|
||||
bt848_ptr_t bti2c;
|
||||
u_long x;
|
||||
|
||||
bti2c = sc->base;
|
||||
|
||||
/* clear status bits */
|
||||
bti2c->int_stat = (BT848_INT_RACK | BT848_INT_I2CDONE);
|
||||
|
||||
bti2c->i2c_data_ctl = ((slave & 0xff) << 24) | cmd;
|
||||
|
||||
BTI2C_DEBUG(printf("r%lx/", (u_long)(((slave & 0xff) << 24) | cmd)));
|
||||
|
||||
/* wait for completion */
|
||||
for ( x = 0x7fffffff; x; --x ) { /* safety valve */
|
||||
if ( bti2c->int_stat & BT848_INT_I2CDONE )
|
||||
break;
|
||||
}
|
||||
|
||||
/* check for ACK */
|
||||
if ( !x || !(bti2c->int_stat & BT848_INT_RACK) ) {
|
||||
BTI2C_DEBUG(printf("r%c%c", (!x)?'+':'-',
|
||||
(!(bti2c->int_stat & BT848_INT_RACK))?'+':'-'));
|
||||
return (SMB_ENOACK);
|
||||
}
|
||||
|
||||
*byte = (char)((bti2c->i2c_data_ctl >> 8) & 0xff);
|
||||
BTI2C_DEBUG(printf("r%x+", *byte));
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
DRIVER_MODULE(bti2c, root, bti2c_driver, bti2c_devclass, 0, 0);
|
||||
#endif
|
||||
34
sys/pci/bt848_i2c.h
Normal file
34
sys/pci/bt848_i2c.h
Normal file
@ -0,0 +1,34 @@
|
||||
/*-
|
||||
* Copyright (c) 1998 Nicolas Souchu
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*
|
||||
* $Id$
|
||||
*
|
||||
*/
|
||||
#ifndef _BT848_I2C_H
|
||||
#define _BT848_I2C_H
|
||||
|
||||
extern int bt848_i2c_attach(int, bt848_ptr_t, struct bktr_i2c_softc *);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user