664 lines
15 KiB
C
664 lines
15 KiB
C
/*-
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* Copyright (c) 1998, 1999, 2001 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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/*
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* Power Management support for the Acer M15x3 chipsets
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <sys/rman.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#include <dev/smbus/smbconf.h>
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#include "smbus_if.h"
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#define ALPM_DEBUG(x) if (alpm_debug) (x)
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#ifdef DEBUG
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static int alpm_debug = 1;
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#else
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static int alpm_debug = 0;
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#endif
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#define ACER_M1543_PMU_ID 0x710110b9
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/*
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* I/O registers offsets - the base address is programmed via the
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* SMBBA PCI configuration register
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*/
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#define SMBSTS 0x0 /* SMBus host/slave status register */
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#define SMBCMD 0x1 /* SMBus host/slave command register */
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#define SMBSTART 0x2 /* start to generate programmed cycle */
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#define SMBHADDR 0x3 /* host address register */
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#define SMBHDATA 0x4 /* data A register for host controller */
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#define SMBHDATB 0x5 /* data B register for host controller */
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#define SMBHBLOCK 0x6 /* block register for host controller */
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#define SMBHCMD 0x7 /* command register for host controller */
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/* SMBHADDR mask. */
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#define LSB 0x1 /* XXX: Better name: Read/Write? */
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/* SMBSTS masks */
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#define TERMINATE 0x80
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#define BUS_COLLI 0x40
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#define DEVICE_ERR 0x20
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#define SMI_I_STS 0x10
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#define HST_BSY 0x08
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#define IDL_STS 0x04
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#define HSTSLV_STS 0x02
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#define HSTSLV_BSY 0x01
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/* SMBCMD masks */
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#define SMB_BLK_CLR 0x80
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#define T_OUT_CMD 0x08
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#define ABORT_HOST 0x04
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/* SMBus commands */
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#define SMBQUICK 0x00
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#define SMBSRBYTE 0x10 /* send/receive byte */
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#define SMBWRBYTE 0x20 /* write/read byte */
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#define SMBWRWORD 0x30 /* write/read word */
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#define SMBWRBLOCK 0x40 /* write/read block */
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/* PCI configuration registers and masks
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*/
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#define COM 0x4
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#define COM_ENABLE_IO 0x1
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#define SMBBA PCIR_BAR(1)
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#define ATPC 0x5b
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#define ATPC_SMBCTRL 0x04 /* XX linux has this as 0x6 */
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#define SMBHSI 0xe0
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#define SMBHSI_SLAVE 0x2
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#define SMBHSI_HOST 0x1
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#define SMBHCBC 0xe2
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#define SMBHCBC_CLOCK 0x70
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#define SMBCLOCK_149K 0x0
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#define SMBCLOCK_74K 0x20
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#define SMBCLOCK_37K 0x40
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#define SMBCLOCK_223K 0x80
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#define SMBCLOCK_111K 0xa0
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#define SMBCLOCK_55K 0xc0
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struct alpm_softc {
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int base;
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struct resource *res;
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bus_space_tag_t smbst;
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bus_space_handle_t smbsh;
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device_t smbus;
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struct mtx lock;
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};
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#define ALPM_LOCK(alpm) mtx_lock(&(alpm)->lock)
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#define ALPM_UNLOCK(alpm) mtx_unlock(&(alpm)->lock)
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#define ALPM_LOCK_ASSERT(alpm) mtx_assert(&(alpm)->lock, MA_OWNED)
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#define ALPM_SMBINB(alpm,register) \
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(bus_space_read_1(alpm->smbst, alpm->smbsh, register))
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#define ALPM_SMBOUTB(alpm,register,value) \
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(bus_space_write_1(alpm->smbst, alpm->smbsh, register, value))
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static int alpm_detach(device_t dev);
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static int
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alpm_probe(device_t dev)
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{
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if (pci_get_devid(dev) == ACER_M1543_PMU_ID) {
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device_set_desc(dev, "AcerLabs M15x3 Power Management Unit");
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return (BUS_PROBE_DEFAULT);
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}
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return (ENXIO);
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}
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static int
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alpm_attach(device_t dev)
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{
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int rid;
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u_int32_t l;
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struct alpm_softc *alpm;
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alpm = device_get_softc(dev);
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/* Unlock SMBIO base register access */
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l = pci_read_config(dev, ATPC, 1);
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pci_write_config(dev, ATPC, l & ~ATPC_SMBCTRL, 1);
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/*
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* XX linux sets clock to 74k, should we?
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l = pci_read_config(dev, SMBHCBC, 1);
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l &= 0x1f;
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l |= SMBCLOCK_74K;
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pci_write_config(dev, SMBHCBC, l, 1);
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*/
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if (bootverbose || alpm_debug) {
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l = pci_read_config(dev, SMBHSI, 1);
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device_printf(dev, "%s/%s",
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(l & SMBHSI_HOST) ? "host":"nohost",
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(l & SMBHSI_SLAVE) ? "slave":"noslave");
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l = pci_read_config(dev, SMBHCBC, 1);
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switch (l & SMBHCBC_CLOCK) {
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case SMBCLOCK_149K:
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printf(" 149K");
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break;
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case SMBCLOCK_74K:
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printf(" 74K");
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break;
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case SMBCLOCK_37K:
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printf(" 37K");
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break;
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case SMBCLOCK_223K:
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printf(" 223K");
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break;
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case SMBCLOCK_111K:
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printf(" 111K");
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break;
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case SMBCLOCK_55K:
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printf(" 55K");
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break;
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default:
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printf("unkown");
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break;
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}
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printf("\n");
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}
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rid = SMBBA;
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alpm->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
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RF_ACTIVE);
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if (alpm->res == NULL) {
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device_printf(dev,"Could not allocate Bus space\n");
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return (ENXIO);
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}
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alpm->smbst = rman_get_bustag(alpm->res);
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alpm->smbsh = rman_get_bushandle(alpm->res);
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mtx_init(&alpm->lock, device_get_nameunit(dev), "alpm", MTX_DEF);
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/* attach the smbus */
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alpm->smbus = device_add_child(dev, "smbus", -1);
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if (alpm->smbus == NULL) {
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alpm_detach(dev);
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return (EINVAL);
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}
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bus_generic_attach(dev);
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return (0);
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}
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static int
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alpm_detach(device_t dev)
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{
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struct alpm_softc *alpm = device_get_softc(dev);
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if (alpm->smbus) {
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device_delete_child(dev, alpm->smbus);
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alpm->smbus = NULL;
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}
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mtx_destroy(&alpm->lock);
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if (alpm->res)
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bus_release_resource(dev, SYS_RES_IOPORT, SMBBA, alpm->res);
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return (0);
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}
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static int
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alpm_callback(device_t dev, int index, void *data)
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{
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int error = 0;
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switch (index) {
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case SMB_REQUEST_BUS:
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case SMB_RELEASE_BUS:
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/* ok, bus allocation accepted */
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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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alpm_clear(struct alpm_softc *sc)
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{
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ALPM_SMBOUTB(sc, SMBSTS, 0xff);
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DELAY(10);
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return (0);
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}
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#if 0
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static int
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alpm_abort(struct alpm_softc *sc)
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{
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ALPM_SMBOUTB(sc, SMBCMD, T_OUT_CMD | ABORT_HOST);
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return (0);
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}
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#endif
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static int
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alpm_idle(struct alpm_softc *sc)
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{
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u_char sts;
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sts = ALPM_SMBINB(sc, SMBSTS);
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ALPM_DEBUG(printf("alpm: idle? STS=0x%x\n", sts));
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return (sts & IDL_STS);
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}
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/*
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* Poll the SMBus controller
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*/
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static int
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alpm_wait(struct alpm_softc *sc)
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{
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int count = 10000;
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u_char sts = 0;
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int error;
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/* wait for command to complete and SMBus controller is idle */
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while (count--) {
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DELAY(10);
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sts = ALPM_SMBINB(sc, SMBSTS);
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if (sts & SMI_I_STS)
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break;
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}
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ALPM_DEBUG(printf("alpm: STS=0x%x\n", sts));
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error = SMB_ENOERR;
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if (!count)
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error |= SMB_ETIMEOUT;
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if (sts & TERMINATE)
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error |= SMB_EABORT;
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if (sts & BUS_COLLI)
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error |= SMB_ENOACK;
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if (sts & DEVICE_ERR)
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error |= SMB_EBUSERR;
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if (error != SMB_ENOERR)
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alpm_clear(sc);
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return (error);
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}
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static int
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alpm_quick(device_t dev, u_char slave, int how)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (EBUSY);
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}
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switch (how) {
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case SMB_QWRITE:
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ALPM_DEBUG(printf("alpm: QWRITE to 0x%x", slave));
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ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
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break;
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case SMB_QREAD:
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ALPM_DEBUG(printf("alpm: QREAD to 0x%x", slave));
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ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
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break;
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default:
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panic("%s: unknown QUICK command (%x)!", __func__,
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how);
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}
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ALPM_SMBOUTB(sc, SMBCMD, SMBQUICK);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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error = alpm_wait(sc);
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ALPM_DEBUG(printf(", error=0x%x\n", error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_sendb(device_t dev, u_char slave, char byte)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
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ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE);
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ALPM_SMBOUTB(sc, SMBHDATA, byte);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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error = alpm_wait(sc);
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ALPM_DEBUG(printf("alpm: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_recvb(device_t dev, u_char slave, char *byte)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
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ALPM_SMBOUTB(sc, SMBCMD, SMBSRBYTE);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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if ((error = alpm_wait(sc)) == SMB_ENOERR)
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*byte = ALPM_SMBINB(sc, SMBHDATA);
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ALPM_DEBUG(printf("alpm: RECVB from 0x%x, byte=0x%x, error=0x%x\n", slave, *byte, error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_writeb(device_t dev, u_char slave, char cmd, char byte)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
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ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE);
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ALPM_SMBOUTB(sc, SMBHDATA, byte);
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ALPM_SMBOUTB(sc, SMBHCMD, cmd);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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error = alpm_wait(sc);
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ALPM_DEBUG(printf("alpm: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_readb(device_t dev, u_char slave, char cmd, char *byte)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
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ALPM_SMBOUTB(sc, SMBCMD, SMBWRBYTE);
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ALPM_SMBOUTB(sc, SMBHCMD, cmd);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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if ((error = alpm_wait(sc)) == SMB_ENOERR)
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*byte = ALPM_SMBINB(sc, SMBHDATA);
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ALPM_DEBUG(printf("alpm: READB from 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, *byte, error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_writew(device_t dev, u_char slave, char cmd, short word)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave & ~LSB);
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ALPM_SMBOUTB(sc, SMBCMD, SMBWRWORD);
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ALPM_SMBOUTB(sc, SMBHDATA, word & 0x00ff);
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ALPM_SMBOUTB(sc, SMBHDATB, (word & 0xff00) >> 8);
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ALPM_SMBOUTB(sc, SMBHCMD, cmd);
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ALPM_SMBOUTB(sc, SMBSTART, 0xff);
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error = alpm_wait(sc);
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ALPM_DEBUG(printf("alpm: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error));
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ALPM_UNLOCK(sc);
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return (error);
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}
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static int
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alpm_readw(device_t dev, u_char slave, char cmd, short *word)
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{
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struct alpm_softc *sc = (struct alpm_softc *)device_get_softc(dev);
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int error;
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u_char high, low;
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ALPM_LOCK(sc);
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alpm_clear(sc);
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if (!alpm_idle(sc)) {
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ALPM_UNLOCK(sc);
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return (SMB_EBUSY);
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}
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ALPM_SMBOUTB(sc, SMBHADDR, slave | LSB);
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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);
|