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freebsd/sys/pci/alpm.c
John Baldwin 85064e683c Various updates to most of the smbus(4) drivers: 
- Use printf() and device_printf() instead of log() in ichsmb(4).
- Create the mutex sooner during ichsmb(4) attach.
- Attach the interrupt handler later during ichsmb(4) attach to avoid
  races.
- Don't try to set PCIM_CMD_PORTEN in ichsmb(4) attach as the PCI bus
  driver does this already.
- Add locking to alpm(4), amdpm(4), amdsmb(4), intsmb(4), nfsmb(4), and
  viapm(4).
- Axe ALPM_SMBIO_BASE_ADDR, it's not really safe to write arbitrary values
  into BARs, and the PCI bus layer will allocate resources now if needed.
- Merge intpm(4) and intsmb(4) into just intsmb(4).  Previously, intpm(4)
  attached to the PCI device and created an intsmb(4) child.  Now,
  intsmb(4) just attaches to PCI directly.
- Change several intsmb functions to take a softc instead of a device_t
  to make things simpler.
2007-01-11 19:56:24 +00:00

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/*-
* Copyright (c) 1998, 1999, 2001 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.
*/
/*
* Power Management support for the Acer M15x3 chipsets
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/smbus/smbconf.h>
#include "smbus_if.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
/*
* 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 */
/* SMBHADDR mask. */
#define LSB 0x1 /* XXX: Better name: Read/Write? */
/* 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 PCIR_BAR(1)
#define ATPC 0x5b
#define ATPC_SMBCTRL 0x04 /* XX linux has this as 0x6 */
#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_softc {
int base;
struct resource *res;
bus_space_tag_t smbst;
bus_space_handle_t smbsh;
device_t smbus;
struct mtx lock;
};
#define ALPM_LOCK(alpm) mtx_lock(&(alpm)->lock)
#define ALPM_UNLOCK(alpm) mtx_unlock(&(alpm)->lock)
#define ALPM_LOCK_ASSERT(alpm) mtx_assert(&(alpm)->lock, MA_OWNED)
#define ALPM_SMBINB(alpm,register) \
(bus_space_read_1(alpm->smbst, alpm->smbsh, register))
#define ALPM_SMBOUTB(alpm,register,value) \
(bus_space_write_1(alpm->smbst, alpm->smbsh, register, value))
static int alpm_detach(device_t dev);
static int
alpm_probe(device_t dev)
{
if (pci_get_devid(dev) == ACER_M1543_PMU_ID) {
device_set_desc(dev, "AcerLabs M15x3 Power Management Unit");
return (BUS_PROBE_DEFAULT);
}
return (ENXIO);
}
static int
alpm_attach(device_t dev)
{
int rid;
u_int32_t l;
struct alpm_softc *alpm;
alpm = device_get_softc(dev);
/* Unlock SMBIO base register access */
l = pci_read_config(dev, ATPC, 1);
pci_write_config(dev, ATPC, l & ~ATPC_SMBCTRL, 1);
/*
* XX linux sets clock to 74k, should we?
l = pci_read_config(dev, SMBHCBC, 1);
l &= 0x1f;
l |= SMBCLOCK_74K;
pci_write_config(dev, SMBHCBC, l, 1);
*/
if (bootverbose || alpm_debug) {
l = pci_read_config(dev, SMBHSI, 1);
device_printf(dev, "%s/%s",
(l & SMBHSI_HOST) ? "host":"nohost",
(l & SMBHSI_SLAVE) ? "slave":"noslave");
l = pci_read_config(dev, 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;
default:
printf("unkown");
break;
}
printf("\n");
}
rid = SMBBA;
alpm->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
RF_ACTIVE);
if (alpm->res == NULL) {
device_printf(dev,"Could not allocate Bus space\n");
return (ENXIO);
}
alpm->smbst = rman_get_bustag(alpm->res);
alpm->smbsh = rman_get_bushandle(alpm->res);
mtx_init(&alpm->lock, device_get_nameunit(dev), "alpm", MTX_DEF);
/* attach the smbus */
alpm->smbus = device_add_child(dev, "smbus", -1);
if (alpm->smbus == NULL) {
alpm_detach(dev);
return (EINVAL);
}
bus_generic_attach(dev);
return (0);
}
static int
alpm_detach(device_t dev)
{
struct alpm_softc *alpm = device_get_softc(dev);
if (alpm->smbus) {
device_delete_child(dev, alpm->smbus);
alpm->smbus = NULL;
}
mtx_destroy(&alpm->lock);
if (alpm->res)
bus_release_resource(dev, SYS_RES_IOPORT, SMBBA, alpm->res);
return (0);
}
static int
alpm_callback(device_t dev, int index, void *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
alpm_clear(struct alpm_softc *sc)
{
ALPM_SMBOUTB(sc, SMBSTS, 0xff);
DELAY(10);
return (0);
}
#if 0
static int
alpm_abort(struct alpm_softc *sc)
{
ALPM_SMBOUTB(sc, SMBCMD, T_OUT_CMD | ABORT_HOST);
return (0);
}
#endif
static int
alpm_idle(struct alpm_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
alpm_wait(struct alpm_softc *sc)
{
int count = 10000;
u_char sts = 0;
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)
alpm_clear(sc);
return (error);
}
static int
alpm_quick(device_t dev, u_char slave, int how)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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)!", __func__,
how);
}
ALPM_SMBOUTB(sc, SMBCMD, SMBQUICK);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alpm_wait(sc);
ALPM_DEBUG(printf(", error=0x%x\n", error));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_sendb(device_t dev, u_char slave, char byte)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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 = alpm_wait(sc);
ALPM_DEBUG(printf("alpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_recvb(device_t dev, u_char slave, char *byte)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(sc);
return (SMB_EBUSY);
}
ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
if ((error = alpm_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));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_writeb(device_t dev, u_char slave, char cmd, char byte)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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 = alpm_wait(sc);
ALPM_DEBUG(printf("alpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_readb(device_t dev, u_char slave, char cmd, char *byte)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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 = alpm_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));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_writew(device_t dev, u_char slave, char cmd, short word)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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 = alpm_wait(sc);
ALPM_DEBUG(printf("alpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_readw(device_t dev, u_char slave, char cmd, short *word)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
int error;
u_char high, low;
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(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 = alpm_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));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
u_char i;
int error;
if (count < 1 || count > 32)
return (SMB_EINVAL);
ALPM_LOCK(sc);
alpm_clear(sc);
if(!alpm_idle(sc)) {
ALPM_UNLOCK(sc);
return (SMB_EBUSY);
}
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, count);
/* fill the 32-byte internal buffer */
for (i = 0; i < count; i++) {
ALPM_SMBOUTB(sc, SMBHBLOCK, buf[i]);
DELAY(2);
}
ALPM_SMBOUTB(sc, SMBHCMD, cmd);
ALPM_SMBOUTB(sc, SMBSTART, 0xff);
error = alpm_wait(sc);
ALPM_DEBUG(printf("alpm: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
ALPM_UNLOCK(sc);
return (error);
}
static int
alpm_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
{
struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
u_char data, len, i;
int error;
if (*count < 1 || *count > 32)
return (SMB_EINVAL);
ALPM_LOCK(sc);
alpm_clear(sc);
if (!alpm_idle(sc)) {
ALPM_UNLOCK(sc);
return (SMB_EBUSY);
}
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 = alpm_wait(sc)) != SMB_ENOERR)
goto error;
len = ALPM_SMBINB(sc, SMBHDATA);
/* read the 32-byte internal buffer */
for (i = 0; i < len; i++) {
data = ALPM_SMBINB(sc, SMBHBLOCK);
if (i < *count)
buf[i] = data;
DELAY(2);
}
*count = len;
error:
ALPM_DEBUG(printf("alpm: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, *count, cmd, error));
ALPM_UNLOCK(sc);
return (error);
}
static devclass_t alpm_devclass;
static device_method_t alpm_methods[] = {
/* device interface */
DEVMETHOD(device_probe, alpm_probe),
DEVMETHOD(device_attach, alpm_attach),
DEVMETHOD(device_detach, alpm_detach),
/* smbus interface */
DEVMETHOD(smbus_callback, alpm_callback),
DEVMETHOD(smbus_quick, alpm_quick),
DEVMETHOD(smbus_sendb, alpm_sendb),
DEVMETHOD(smbus_recvb, alpm_recvb),
DEVMETHOD(smbus_writeb, alpm_writeb),
DEVMETHOD(smbus_readb, alpm_readb),
DEVMETHOD(smbus_writew, alpm_writew),
DEVMETHOD(smbus_readw, alpm_readw),
DEVMETHOD(smbus_bwrite, alpm_bwrite),
DEVMETHOD(smbus_bread, alpm_bread),
{ 0, 0 }
};
static driver_t alpm_driver = {
"alpm",
alpm_methods,
sizeof(struct alpm_softc)
};
DRIVER_MODULE(alpm, pci, alpm_driver, alpm_devclass, 0, 0);
DRIVER_MODULE(smbus, alpm, smbus_driver, smbus_devclass, 0, 0);
MODULE_DEPEND(alpm, pci, 1, 1, 1);
MODULE_DEPEND(alpm, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
MODULE_VERSION(alpm, 1);
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