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freebsd-skq/sys/pci/alpm.c
mdodd 1b3328c300 Alter the behavior of sys/kern/subr_bus.c:device_print_child() 
- device_print_child() either lets the BUS_PRINT_CHILD
	  method produce the entire device announcement message or
	  it prints "foo0: not found\n"

Alter sys/kern/subr_bus.c:bus_generic_print_child() to take on
the previous behavior of device_print_child() (printing the
"foo0: <FooDevice 1.1>" bit of the announce message.)

Provide bus_print_child_header() and bus_print_child_footer()
to actually print the output for bus_generic_print_child().
These functions should be used whenever possible (unless you can
just use bus_generic_print_child())

The BUS_PRINT_CHILD method now returns int instead of void.

Modify everything else that defines or uses a BUS_PRINT_CHILD
method to comply with the above changes.

	- Devices are 'on' a bus, not 'at' it.
	- If a custom BUS_PRINT_CHILD method does the same thing
	  as bus_generic_print_child(), use bus_generic_print_child()
	- Use device_get_nameunit() instead of both
	  device_get_name() and device_get_unit()
	- All BUS_PRINT_CHILD methods return the number of
	  characters output.

Reviewed by: dfr, peter
1999-07-29 01:03:04 +00:00

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/*-
* Copyright (c) 1998, 1999 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: alpm.c,v 1.5 1999/07/03 20:17:00 peter Exp $
*
*/
/*
* Power Management support for the Acer M15x3 chipsets
*/
#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 <machine/bus_pio.h>
#include <machine/bus_memio.h>
#include <machine/bus.h>
#include <pci/pcivar.h>
#include <pci/pcireg.h>
#include <dev/iicbus/iiconf.h>
#include <dev/smbus/smbconf.h>
#include "smbus_if.h"
#include "alpm.h"
#define ALPM_DEBUG(x) if (alpm_debug) (x)
#ifdef DEBUG
static int alpm_debug = 1;
#else
static int alpm_debug = 0;
#endif
#define ACER_M1543_PMU_ID 0x710110b9
/* Uncomment this line to force another I/O base address for SMB */
/* #define ALPM_SMBIO_BASE_ADDR 0x3a80 */
/* I/O registers offsets - the base address is programmed via the
* SMBBA PCI configuration register
*/
#define SMBSTS 0x0 /* SMBus host/slave status register */
#define SMBCMD 0x1 /* SMBus host/slave command register */
#define SMBSTART 0x2 /* start to generate programmed cycle */
#define SMBHADDR 0x3 /* host address register */
#define SMBHDATA 0x4 /* data A register for host controller */
#define SMBHDATB 0x5 /* data B register for host controller */
#define SMBHBLOCK 0x6 /* block register for host controller */
#define SMBHCMD 0x7 /* command register for host controller */
/* SMBSTS masks */
#define TERMINATE 0x80
#define BUS_COLLI 0x40
#define DEVICE_ERR 0x20
#define SMI_I_STS 0x10
#define HST_BSY 0x08
#define IDL_STS 0x04
#define HSTSLV_STS 0x02
#define HSTSLV_BSY 0x01
/* SMBCMD masks */
#define SMB_BLK_CLR 0x80
#define T_OUT_CMD 0x08
#define ABORT_HOST 0x04
/* SMBus commands */
#define SMBQUICK 0x00
#define SMBSRBYTE 0x10 /* send/receive byte */
#define SMBWRBYTE 0x20 /* write/read byte */
#define SMBWRWORD 0x30 /* write/read word */
#define SMBWRBLOCK 0x40 /* write/read block */
/* PCI configuration registers and masks
*/
#define COM 0x4
#define COM_ENABLE_IO 0x1
#define SMBBA 0x14
#define ATPC 0x5b
#define ATPC_SMBCTRL 0x04
#define SMBHSI 0xe0
#define SMBHSI_SLAVE 0x2
#define SMBHSI_HOST 0x1
#define SMBHCBC 0xe2
#define SMBHCBC_CLOCK 0x70
#define SMBCLOCK_149K 0x0
#define SMBCLOCK_74K 0x20
#define SMBCLOCK_37K 0x40
#define SMBCLOCK_223K 0x80
#define SMBCLOCK_111K 0xa0
#define SMBCLOCK_55K 0xc0
struct alpm_data {
int base;
bus_space_tag_t smbst;
bus_space_handle_t smbsh;
pcici_t tag;
};
struct alpm_data alpmdata[NALPM];
struct alsmb_softc {
int base;
device_t smbus;
struct alpm_data *alpm;
};
#define ALPM_SMBINB(alsmb,register) \
(bus_space_read_1(alsmb->alpm->smbst, alsmb->alpm->smbsh, register))
#define ALPM_SMBOUTB(alsmb,register,value) \
(bus_space_write_1(alsmb->alpm->smbst, alsmb->alpm->smbsh, register, value))
static int alsmb_probe(device_t);
static int alsmb_attach(device_t);
static int alsmb_smb_callback(device_t, int, caddr_t *);
static int alsmb_smb_quick(device_t dev, u_char slave, int how);
static int alsmb_smb_sendb(device_t dev, u_char slave, char byte);
static int alsmb_smb_recvb(device_t dev, u_char slave, char *byte);
static int alsmb_smb_writeb(device_t dev, u_char slave, char cmd, char byte);
static int alsmb_smb_readb(device_t dev, u_char slave, char cmd, char *byte);
static int alsmb_smb_writew(device_t dev, u_char slave, char cmd, short word);
static int alsmb_smb_readw(device_t dev, u_char slave, char cmd, short *word);
static int alsmb_smb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf);
static int alsmb_smb_bread(device_t dev, u_char slave, char cmd, u_char count, char *byte);
static devclass_t alsmb_devclass;
static device_method_t alsmb_methods[] = {
/* device interface */
DEVMETHOD(device_probe, alsmb_probe),
DEVMETHOD(device_attach, alsmb_attach),
/* bus interface */
DEVMETHOD(bus_print_child, bus_generic_print_child),
/* smbus interface */
DEVMETHOD(smbus_callback, alsmb_smb_callback),
DEVMETHOD(smbus_quick, alsmb_smb_quick),
DEVMETHOD(smbus_sendb, alsmb_smb_sendb),
DEVMETHOD(smbus_recvb, alsmb_smb_recvb),
DEVMETHOD(smbus_writeb, alsmb_smb_writeb),
DEVMETHOD(smbus_readb, alsmb_smb_readb),
DEVMETHOD(smbus_writew, alsmb_smb_writew),
DEVMETHOD(smbus_readw, alsmb_smb_readw),
DEVMETHOD(smbus_bwrite, alsmb_smb_bwrite),
DEVMETHOD(smbus_bread, alsmb_smb_bread),
{ 0, 0 }
};
static driver_t alsmb_driver = {
"alsmb",
alsmb_methods,
sizeof(struct alsmb_softc),
};
static const char* alpm_pci_probe(pcici_t tag, pcidi_t type);
static void alpm_pci_attach(pcici_t tag, int unit);
static u_long alpm_count;
static struct pci_device alpm_device = {
"alpm",
alpm_pci_probe,
alpm_pci_attach,
&alpm_count
};
COMPAT_PCI_DRIVER (alpm, alpm_device);
static const char*
alpm_pci_probe(pcici_t tag, pcidi_t type)
{
if (type == ACER_M1543_PMU_ID)
return ("AcerLabs M15x3 Power Management Unit");
return ((char *)0);
}
static void
alpm_pci_attach(pcici_t tag, int unit)
{
struct alpm_data *alpm;
u_long l;
if (unit >= NALPM) {
printf("alpm%d: attach: only %d units configured.\n",
unit, NALPM);
return;
}
alpm = &alpmdata[unit];
alpm->tag = tag;
/* Unlock SMBIO base register access */
l = pci_cfgread(tag, ATPC, 1);
pci_cfgwrite(tag, ATPC, l & ~ATPC_SMBCTRL, 1);
if (bootverbose) {
l = pci_cfgread(tag, SMBHSI, 1);
printf("alsmb%d: %s/%s", unit,
(l & SMBHSI_HOST) ? "host":"nohost",
(l & SMBHSI_SLAVE) ? "slave":"noslave");
l = pci_cfgread(tag, SMBHCBC, 1);
switch (l & SMBHCBC_CLOCK) {
case SMBCLOCK_149K:
printf(" 149K");
break;
case SMBCLOCK_74K:
printf(" 74K");
break;
case SMBCLOCK_37K:
printf(" 37K");
break;
case SMBCLOCK_223K:
printf(" 223K");
break;
case SMBCLOCK_111K:
printf(" 111K");
break;
case SMBCLOCK_55K:
printf(" 55K");
break;
}
}
alpm->smbst = I386_BUS_SPACE_IO;
#ifdef ALPM_SMBIO_BASE_ADDR
/* disable I/O */
l = pci_cfgread(tag, COM, 2);
pci_cfgwrite(tag, COM, l & ~COM_ENABLE_IO, 2);
/* set the I/O base address */
pci_cfgwrite(tag, SMBBA, ALPM_SMBIO_BASE_ADDR | 0x1, 4);
/* enable I/O */
pci_cfgwrite(tag, COM, l | COM_ENABLE_IO, 2);
alpm->smbsh = ALPM_SMBIO_BASE_ADDR;
#else
alpm->smbsh = pci_cfgread(tag, SMBBA, 4) & ~0x1;
#endif
if (bootverbose)
printf(" at 0x%x\n", alpm->smbsh);
/* XXX add the I2C interface to the root_bus until pcibus is ready */
device_add_child(root_bus, "alsmb", unit, NULL);
return;
}
/*
* Not a real probe, we know the device exists since the device has
* been added after the successfull pci probe.
*/
static int
alsmb_probe(device_t dev)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
sc->alpm = &alpmdata[device_get_unit(dev)];
device_set_desc(dev, "Aladdin IV/V/Pro2 SMBus controller");
return (0);
}
static int
alsmb_attach(device_t dev)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
/* allocate a new smbus device */
sc->smbus = smbus_alloc_bus(dev);
/* probe and attach the smbus */
device_probe_and_attach(sc->smbus);
return (0);
}
static int
alsmb_smb_callback(device_t dev, int index, caddr_t *data)
{
int error = 0;
switch (index) {
case SMB_REQUEST_BUS:
case SMB_RELEASE_BUS:
/* ok, bus allocation accepted */
break;
default:
error = EINVAL;
}
return (error);
}
static int
alsmb_clear(struct alsmb_softc *sc)
{
ALPM_SMBOUTB(sc, SMBSTS, 0xff);
DELAY(10);
return (0);
}
#if 0
static int
alsmb_abort(struct alsmb_softc *sc)
{
ALPM_SMBOUTB(sc, SMBCMD, T_OUT_CMD | ABORT_HOST);
return (0);
}
#endif
static int
alsmb_idle(struct alsmb_softc *sc)
{
u_char sts;
sts = ALPM_SMBINB(sc, SMBSTS);
ALPM_DEBUG(printf("alpm: idle? STS=0x%x\n", sts));
return (sts & IDL_STS);
}
/*
* Poll the SMBus controller
*/
static int
alsmb_wait(struct alsmb_softc *sc)
{
int count = 10000;
u_char sts;
int error;
/* wait for command to complete and SMBus controller is idle */
while(count--) {
DELAY(10);
sts = ALPM_SMBINB(sc, SMBSTS);
if (sts & SMI_I_STS)
break;
}
ALPM_DEBUG(printf("alpm: STS=0x%x\n", sts));
error = SMB_ENOERR;
if (!count)
error |= SMB_ETIMEOUT;
if (sts & TERMINATE)
error |= SMB_EABORT;
if (sts & BUS_COLLI)
error |= SMB_ENOACK;
if (sts & DEVICE_ERR)
error |= SMB_EBUSERR;
if (error != SMB_ENOERR)
alsmb_clear(sc);
return (error);
}
static int
alsmb_smb_quick(device_t dev, u_char slave, int how)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (EBUSY);
switch (how) {
case SMB_QWRITE:
ALPM_DEBUG(printf("alpm: QWRITE to 0x%x", slave));
ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
break;
case SMB_QREAD:
ALPM_DEBUG(printf("alpm: QREAD to 0x%x", slave));
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
break;
default:
panic("%s: unknown QUICK command (%x)!", __FUNCTION__,
how);
}
ALPM_SMBOUTB(sc, SMBCMD, SMBQUICK);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alsmb_wait(sc);
ALPM_DEBUG(printf(", error=0x%x\n", error));
return (error);
}
static int
alsmb_smb_sendb(device_t dev, u_char slave, char byte)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE);
ALPM_SMBOUTB(sc, SMBHDATA, byte);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alsmb_wait(sc);
ALPM_DEBUG(printf("alpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
return (error);
}
static int
alsmb_smb_recvb(device_t dev, u_char slave, char *byte)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alsmb_wait(sc)) == SMB_ENOERR)
*byte = ALPM_SMBINB(sc, SMBHDATA);
ALPM_DEBUG(printf("alpm: RECVB from 0x%x, byte=0x%x, error=0x%x\n", slave, *byte, error));
return (error);
}
static int
alsmb_smb_writeb(device_t dev, u_char slave, char cmd, char byte)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE);
ALPM_SMBOUTB(sc, SMBHDATA, byte);
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alsmb_wait(sc);
ALPM_DEBUG(printf("alpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
return (error);
}
static int
alsmb_smb_readb(device_t dev, u_char slave, char cmd, char *byte)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE);
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alsmb_wait(sc)) == SMB_ENOERR)
*byte = ALPM_SMBINB(sc, SMBHDATA);
ALPM_DEBUG(printf("alpm: READB from 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, *byte, error));
return (error);
}
static int
alsmb_smb_writew(device_t dev, u_char slave, char cmd, short word)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBWRWORD);
ALPM_SMBOUTB(sc, SMBHDATA, word & 0x00ff);
ALPM_SMBOUTB(sc, SMBHDATB, (word & 0xff00) >> 8);
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alsmb_wait(sc);
ALPM_DEBUG(printf("alpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error));
return (error);
}
static int
alsmb_smb_readw(device_t dev, u_char slave, char cmd, short *word)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
int error;
u_char high, low;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBWRWORD);
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alsmb_wait(sc)) == SMB_ENOERR) {
low = ALPM_SMBINB(sc, SMBHDATA);
high = ALPM_SMBINB(sc, SMBHDATB);
*word = ((high & 0xff) << 8) | (low & 0xff);
}
ALPM_DEBUG(printf("alpm: READW from 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, *word, error));
return (error);
}
static int
alsmb_smb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
u_char remain, len, i;
int error = SMB_ENOERR;
alsmb_clear(sc);
if(!alsmb_idle(sc))
return (SMB_EBUSY);
remain = count;
while (remain) {
len = min(remain, 32);
ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
/* set the cmd and reset the
* 32-byte long internal buffer */
ALPM_SMBOUTB(sc, SMBCMD, SMBWRBLOCK | SMB_BLK_CLR);
ALPM_SMBOUTB(sc, SMBHDATA, len);
/* fill the 32-byte internal buffer */
for (i=0; i<len; i++) {
ALPM_SMBOUTB(sc, SMBHBLOCK, buf[count-remain+i]);
DELAY(2);
}
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alsmb_wait(sc)) != SMB_ENOERR)
goto error;
remain -= len;
}
error:
ALPM_DEBUG(printf("alpm: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
return (error);
}
static int
alsmb_smb_bread(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct alsmb_softc *sc = (struct alsmb_softc *)device_get_softc(dev);
u_char remain, len, i;
int error = SMB_ENOERR;
alsmb_clear(sc);
if (!alsmb_idle(sc))
return (SMB_EBUSY);
remain = count;
while (remain) {
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
/* set the cmd and reset the
* 32-byte long internal buffer */
ALPM_SMBOUTB(sc, SMBCMD, SMBWRBLOCK | SMB_BLK_CLR);
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alsmb_wait(sc)) != SMB_ENOERR)
goto error;
len = ALPM_SMBINB(sc, SMBHDATA);
/* read the 32-byte internal buffer */
for (i=0; i<len; i++) {
buf[count-remain+i] = ALPM_SMBINB(sc, SMBHBLOCK);
DELAY(2);
}
remain -= len;
}
error:
ALPM_DEBUG(printf("alpm: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
return (error);
}
DRIVER_MODULE(alsmb, root, alsmb_driver, alsmb_devclass, 0, 0);
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