/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. * Copyright (c) 2011 Bayard G. Bell. All rights reserved. */ /* * I2C leaf driver for the PCF8591 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * CONTROL OF CHIP * PCF8591 Temp sensing control register definitions * * --------------------------------------------- * | 0 | AOE | X | X | 0 | AIF | X | X | * --------------------------------------------- * AOE = Analog out enable.. not used on out implementation * 5 & 4 = Analog Input Programming.. see data sheet for bits.. * * AIF = Auto increment flag * bits 1 & 0 are for the Chennel number. */ #define I2CTRANS_DATA 0 #define I2CRAW_DATA 1 #define TEMP_TABLE_SIZE 256 #define SHUTDOWN_TEMP_MIN 55 #define SHUTDOWN_TEMP_MAX 85 #ifdef DEBUG #define dbg_print(level, str) cmn_err(level, str); #else #define dbg_print(level, str) {; } #endif extern int nct_i2c_transfer(i2c_client_hdl_t i2c_hdl, i2c_transfer_t *i2c_tran); static uchar_t _cpu_temps[TEMP_TABLE_SIZE + 4]; /* see attach */ static void *pcf8591_soft_statep; /* * cb ops (only need ioctl) */ static int pcf8591_open(dev_t *, int, int, cred_t *); static int pcf8591_close(dev_t, int, int, cred_t *); static int pcf8591_read(dev_t dev, struct uio *uiop, cred_t *cred_p); static int pcf8591_ioctl(dev_t, int, intptr_t, int, cred_t *, int *); static struct cb_ops pcf8591_cbops = { pcf8591_open, /* open */ pcf8591_close, /* close */ nodev, /* strategy */ nodev, /* print */ nodev, /* dump */ pcf8591_read, /* read */ nodev, /* write */ pcf8591_ioctl, /* ioctl */ nodev, /* devmap */ nodev, /* mmap */ nodev, /* segmap */ nochpoll, /* poll */ ddi_prop_op, /* cb_prop_op */ NULL, /* streamtab */ D_NEW | D_MP | D_HOTPLUG, /* Driver compatibility flag */ CB_REV, /* rev */ nodev, /* int (*cb_aread)() */ nodev /* int (*cb_awrite)() */ }; /* * dev ops */ static int pcf8591_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result); static int pcf8591_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); static int pcf8591_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); /* kstat routines */ static int pcf8591_add_kstats(struct pcf8591_unit *); static void pcf8591_delete_kstats(struct pcf8591_unit *); static int pcf8591_temp_kstat_update(kstat_t *, int); static int pcf8591_read_chip(struct pcf8591_unit *, uint8_t, int); static int pcf8591_read_props(struct pcf8591_unit *unitp); static struct dev_ops pcf8591_ops = { DEVO_REV, 0, pcf8591_info, nulldev, nulldev, pcf8591_attach, pcf8591_detach, nodev, &pcf8591_cbops, NULL, NULL, ddi_quiesce_not_supported, /* devo_quiesce */ }; extern struct mod_ops mod_driverops; static struct modldrv pcf8591_modldrv = { &mod_driverops, /* type of module - driver */ "Netract pcf8591 (adio)", &pcf8591_ops, }; static struct modlinkage pcf8591_modlinkage = { MODREV_1, &pcf8591_modldrv, 0 }; int pcf8591_debug = 0x02; static uint8_t translate_cputemp(uint8_t value); int _init(void) { register int error; error = mod_install(&pcf8591_modlinkage); if (error == 0) { (void) ddi_soft_state_init(&pcf8591_soft_statep, sizeof (struct pcf8591_unit), PCF8591_MAX_DEVS); } return (error); } int _fini(void) { register int error; error = mod_remove(&pcf8591_modlinkage); if (error == 0) { ddi_soft_state_fini(&pcf8591_soft_statep); } return (error); } int _info(struct modinfo *modinfop) { return (mod_info(&pcf8591_modlinkage, modinfop)); } /*ARGSUSED*/ static int pcf8591_open(dev_t *devp, int flags, int otyp, cred_t *credp) { int err = 0; struct pcf8591_unit *unitp; minor_t minor = getminor(*devp); int instance = PCF8591_MINOR_TO_DEVINST(minor); int channel = PCF8591_MINOR_TO_CHANNEL(minor); if (instance < 0) { return (ENXIO); } unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (ENXIO); } if (otyp != OTYP_CHR) { return (EINVAL); } mutex_enter(&unitp->umutex); if (flags & FEXCL) { if (unitp->pcf8591_oflag[channel] != 0) { err = EBUSY; } else { unitp->pcf8591_oflag[channel] = FEXCL; } } else { if (unitp->pcf8591_oflag[channel] == FEXCL) { err = EBUSY; } else { unitp->pcf8591_oflag[channel] = FOPEN; } } mutex_exit(&unitp->umutex); return (err); } /*ARGSUSED*/ static int pcf8591_close(dev_t devp, int flags, int otyp, cred_t *credp) { struct pcf8591_unit *unitp; minor_t minor = getminor(devp); int instance = PCF8591_MINOR_TO_DEVINST(minor); int channel = PCF8591_MINOR_TO_CHANNEL(minor); #ifdef lint flags = flags; otyp = otyp; #endif if (instance < 0) { return (ENXIO); } unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (ENXIO); } mutex_enter(&unitp->umutex); unitp->pcf8591_oflag[channel] = 0; mutex_exit(&unitp->umutex); return (DDI_SUCCESS); } static int pcf8591_io(dev_t dev, struct uio *uiop, int rw) { int err = 0; struct pcf8591_unit *unitp; minor_t minor = getminor(dev); int instance = PCF8591_MINOR_TO_DEVINST(minor); int channel = PCF8591_MINOR_TO_CHANNEL(minor); int bytes_to_rw; int translate = 0; /* * At this point we don't have a write operation to pcf8591. */ if (rw == B_WRITE) { return (EACCES); } if (instance < 0) { return (ENXIO); } unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (ENXIO); } if ((bytes_to_rw = uiop->uio_resid) > PCF8591_TRAN_SIZE) { return (EINVAL); } /* * Need to serialize all read operations, since there is a single * i2c_transfer_t structure allocated for all read and write ops. * We can't share the i2c bus among multiple transactions anyway, * so this does not affect performance. */ mutex_enter(&unitp->umutex); while (unitp->pcf8591_flags == PCF8591_BUSY) { if (cv_wait_sig(&unitp->pcf8591_cv, &unitp->umutex) <= 0) { mutex_exit(&unitp->umutex); return (EINTR); } } unitp->pcf8591_flags = PCF8591_BUSY; mutex_exit(&unitp->umutex); if (bytes_to_rw == 1) translate = 1; /* * Event sequence: * 1. set up the control register write, for now we'll always read * channel 0, which is the only active 8591 port on the Nordica * TODO: We'll need a minor node for each port that is used. * 2. increment read count to read the throw-away byte * 3. start the write/read of control/data registers * 4. throw the first byte away * 5. then return the data */ unitp->i2c_tran->i2c_flags = I2C_WR_RD; unitp->i2c_tran->i2c_wlen = 1; unitp->i2c_tran->i2c_wbuf[0] = (unitp->pcf8591_inprog | channel); /* * read extra byte to throw away the first, (PCF8591 datasheet) */ unitp->i2c_tran->i2c_rlen = bytes_to_rw + 1; if (nct_i2c_transfer(unitp->pcf8591_hdl, unitp->i2c_tran) != I2C_SUCCESS) { err = EIO; } else { /* * Throw away the first byte according to PCF8591 datasheet * If translating, use the second byte. */ if (translate) { unitp->i2c_tran->i2c_rbuf[0] = translate_cputemp(unitp->i2c_tran->i2c_rbuf[1]); } else { unitp->i2c_tran->i2c_rbuf[0] = unitp->i2c_tran->i2c_rbuf[1]; unitp->i2c_tran->i2c_rbuf[1] = 0; } err = uiomove(unitp->i2c_tran->i2c_rbuf, bytes_to_rw, UIO_READ, uiop); } mutex_enter(&unitp->umutex); unitp->pcf8591_flags = 0; cv_signal(&unitp->pcf8591_cv); mutex_exit(&unitp->umutex); return (err); } /*ARGSUSED*/ static int pcf8591_read(dev_t dev, struct uio *uiop, cred_t *cred_p) { return (pcf8591_io(dev, uiop, B_READ)); } static int call_copyin(caddr_t arg, struct pcf8591_unit *unitp, int mode) { uchar_t *wbuf; uchar_t *rbuf; i2c_transfer_t i2ct; i2c_transfer_t *i2ctp = unitp->i2c_tran; if (ddi_copyin((void *)arg, (caddr_t)&i2ct, sizeof (i2c_transfer_t), mode) != DDI_SUCCESS) { return (I2C_FAILURE); } /* * Save the read and write buffer pointers in the transfer * structure, otherwise these will get overwritten when we * do a bcopy. Restore once done. */ wbuf = i2ctp->i2c_wbuf; rbuf = i2ctp->i2c_rbuf; bcopy(&i2ct, i2ctp, sizeof (i2c_transfer_t)); i2ctp->i2c_wbuf = wbuf; i2ctp->i2c_rbuf = rbuf; /* * copyin the read and write buffers to the saved buffers. */ if (i2ct.i2c_wlen != 0) { if (ddi_copyin(i2ct.i2c_wbuf, (caddr_t)i2ctp->i2c_wbuf, i2ct.i2c_wlen, mode) != DDI_SUCCESS) { return (I2C_FAILURE); } } return (I2C_SUCCESS); } static int call_copyout(caddr_t arg, struct pcf8591_unit *unitp, int mode) { i2c_transfer_t i2ct; i2c_transfer_t *i2ctp = unitp->i2c_tran; uint16_t i2c_actlen; /* * We will copyout the last three fields only, skipping * the remaining ones, before copying the rbuf to the * user buffer. */ int uskip = sizeof (i2c_transfer_t) - 3*sizeof (int16_t), kskip = sizeof (i2c_transfer_t) - 3*sizeof (int16_t); /* * First copyin the user structure to the temporary i2ct, * so that we have the wbuf and rbuf addresses in it. */ uskip = sizeof (i2c_transfer_t) - 3 * (sizeof (uint16_t)); /* * copyout the last three out fields now. */ if (ddi_copyout((void *)((intptr_t)i2ctp+kskip), (void *) ((intptr_t)arg + uskip), 3*sizeof (uint16_t), mode) != DDI_SUCCESS) { return (I2C_FAILURE); } /* * In case we have something to write, get the address of the read * buffer. */ if (i2ctp->i2c_rlen - i2ctp->i2c_r_resid > 0) { if (ddi_copyin((void *)arg, &i2ct, sizeof (i2c_transfer_t), mode) != DDI_SUCCESS) { return (I2C_FAILURE); } /* * copyout the read buffer to the saved user buffer in i2ct. */ i2c_actlen = i2ctp->i2c_rlen - i2ctp->i2c_r_resid; if (ddi_copyout(i2ctp->i2c_rbuf, i2ct.i2c_rbuf, i2c_actlen, mode) != DDI_SUCCESS) { return (I2C_FAILURE); } } return (I2C_SUCCESS); } /* * The ioctls will use the same name as the Javelin ioctls. We * will have a very restricted set for MC, and unlike Javelin * will not have a envctrl_chip structure to return values * from the driver. All we will have is a uint8_t value to * get or set values from the driver. Also, unlike the Javelin, * where 'index' is used to specify the input port from where * temperature is collected, here different minor nodes will be * created by the driver for each port, eliminating the need for * 'index' - leaving us with only the value to pass. */ /*ARGSUSED*/ static int pcf8591_ioctl(dev_t dev, int cmd, intptr_t arg, int mode, cred_t *credp, int *rvalp) { int err = 0; struct pcf8591_unit *unitp; minor_t minor = getminor(dev); int instance = PCF8591_MINOR_TO_DEVINST(minor); int channel = PCF8591_MINOR_TO_CHANNEL(minor); unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); mutex_enter(&unitp->umutex); while (unitp->pcf8591_flags == PCF8591_BUSY) { if (cv_wait_sig(&unitp->pcf8591_cv, &unitp->umutex) <= 0) { mutex_exit(&unitp->umutex); return (EINTR); } } unitp->pcf8591_flags = PCF8591_BUSY; mutex_exit(&unitp->umutex); switch (cmd) { case ENVC_IOC_GETTEMP: { /* * Read the status byte from pcf8591 chip. The value will * be already converted to Celcius by translate_cputemp. */ (void) pcf8591_read_chip(unitp, channel, 1); if (ddi_copyout(unitp->i2c_tran->i2c_rbuf, (caddr_t)arg, sizeof (uint8_t), mode) != DDI_SUCCESS) { err = EFAULT; } break; } case ENVC_IOC_GETMODE: { uint8_t curr_mode = unitp->current_mode; if (ddi_copyout((caddr_t)&curr_mode, (caddr_t)arg, sizeof (uint8_t), mode) != DDI_SUCCESS) { err = EFAULT; } break; } case ENVC_IOC_SETMODE: { uint8_t curr_mode; if (ddi_copyin((caddr_t)arg, (caddr_t)&curr_mode, sizeof (uint8_t), mode) != DDI_SUCCESS) { err = EFAULT; break; } if (curr_mode == ENVCTRL_DIAG_MODE || curr_mode == ENVCTRL_NORMAL_MODE) { unitp->current_mode = curr_mode; /* Don't do anything */ } break; } /* Testing, may be removed */ case I2CDEV_TRAN: if (call_copyin((caddr_t)arg, unitp, mode) != I2C_SUCCESS) { err = EFAULT; break; } if (nct_i2c_transfer(unitp->pcf8591_hdl, unitp->i2c_tran) != I2C_SUCCESS) { err = EFAULT; break; } if (call_copyout((caddr_t)arg, unitp, mode) != I2C_SUCCESS) { err = EFAULT; break; } break; /* * TESTING TRANSLATION from "adc" "table" property * translate thermistor index into temp Celcius */ case I2CDEV_GETTEMP: { struct i2c_transfer *tp; if (call_copyin((caddr_t)arg, unitp, mode) != I2C_SUCCESS) { err = EFAULT; break; } tp = unitp->i2c_tran; if (tp->i2c_rlen != 1) { err = EINVAL; break; } /* * Throw away the first byte according to PCF8591 datasheet, * so read two bytes */ tp->i2c_rlen = 2; if (nct_i2c_transfer(unitp->pcf8591_hdl, unitp->i2c_tran) != I2C_SUCCESS) { err = EFAULT; break; } #ifdef DEBUG if (pcf8591_debug & 0x0010) cmn_err(CE_NOTE, "pcf8591_ioctl: i2c_rlen=%d; " "i2c_rbuf[0,1]=0x%x,0x%x\n", tp->i2c_rlen, tp->i2c_rbuf[0], tp->i2c_rbuf[1]); #endif /* DEBUG */ /* * Throw away the first byte according to PCF8591 datasheet */ if ((tp->i2c_rbuf[0] = translate_cputemp(tp->i2c_rbuf[1])) == 0) { err = EINVAL; break; } tp->i2c_rbuf[1] = 0; if (call_copyout((caddr_t)arg, unitp, mode) != I2C_SUCCESS) { err = EFAULT; break; } break; } case I2CDEV_GETTABLES: { break; } default: err = EINVAL; } mutex_enter(&unitp->umutex); unitp->pcf8591_flags = 0; cv_signal(&unitp->pcf8591_cv); mutex_exit(&unitp->umutex); return (err); } static int pcf8591_do_detach(dev_info_t *dip) { register struct pcf8591_unit *unitp; int instance; uint_t attach_flag; instance = ddi_get_instance(dip); unitp = ddi_get_soft_state(pcf8591_soft_statep, instance); attach_flag = unitp->attach_flag; if (attach_flag & PCF8591_KSTAT_INIT) { pcf8591_delete_kstats(unitp); } if (attach_flag & PCF8591_LOCK_INIT) { mutex_destroy(&unitp->umutex); cv_destroy(&unitp->pcf8591_cv); } /* * Restore the lengths of the rbuf and wbuf, which was originally * allocated so that the appropriate amount of rbuf and wbuf are * freed. */ if (attach_flag & PCF8591_ALLOC_TRANSFER) { unitp->i2c_tran->i2c_wlen = MAX_WLEN; unitp->i2c_tran->i2c_rlen = MAX_RLEN; i2c_transfer_free(unitp->pcf8591_hdl, unitp->i2c_tran); } if (attach_flag & PCF8591_REGISTER_CLIENT) { i2c_client_unregister(unitp->pcf8591_hdl); } if (attach_flag & PCF8591_MINORS_CREATED) { ddi_remove_minor_node(dip, NULL); } /* * Free the memory allocated for the properties. */ if (attach_flag & PCF8591_PROPS_READ) { ddi_prop_free(unitp->props.name); if (unitp->props.num_chans_used) { ddi_prop_free(unitp->props.channels_in_use); } if (unitp->props.channels_description) { ddi_prop_free(unitp->props.channels_description); } } if (attach_flag & PCF8591_SOFT_STATE_ALLOC) { ddi_soft_state_free(pcf8591_soft_statep, instance); } return (DDI_SUCCESS); } static int pcf8591_do_suspend(dev_info_t *dip) { int instance = ddi_get_instance(dip); struct pcf8591_unit *unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (ENXIO); } /* * Set the busy flag so that future transactions block * until resume. */ mutex_enter(&unitp->umutex); while (unitp->pcf8591_flags == PCF8591_BUSY) { if (cv_wait_sig(&unitp->pcf8591_cv, &unitp->umutex) <= 0) { mutex_exit(&unitp->umutex); return (DDI_FAILURE); } } unitp->pcf8591_flags = PCF8591_BUSY; mutex_exit(&unitp->umutex); return (DDI_SUCCESS); } static int pcf8591_do_resume(dev_info_t *dip) { int instance = ddi_get_instance(dip); struct pcf8591_unit *unitp = (struct pcf8591_unit *) ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (ENXIO); } mutex_enter(&unitp->umutex); unitp->pcf8591_flags = 0; cv_signal(&unitp->pcf8591_cv); mutex_exit(&unitp->umutex); return (DDI_SUCCESS); } static int pcf8591_do_attach(dev_info_t *dip) { register struct pcf8591_unit *unitp; int i, instance; char name[MAXNAMELEN]; minor_t minor; instance = ddi_get_instance(dip); if (ddi_soft_state_zalloc(pcf8591_soft_statep, instance) != 0) { return (DDI_FAILURE); } unitp = ddi_get_soft_state(pcf8591_soft_statep, instance); if (unitp == NULL) { return (DDI_FAILURE); } unitp->dip = dip; unitp->attach_flag = PCF8591_SOFT_STATE_ALLOC; if (pcf8591_read_props(unitp) != DDI_PROP_SUCCESS) { (void) pcf8591_do_detach(dip); return (DDI_FAILURE); } unitp->attach_flag |= PCF8591_PROPS_READ; /* * Set the current operating mode to NORMAL_MODE. */ unitp->current_mode = ENVCTRL_NORMAL_MODE; /* normal mode */ (void) snprintf(unitp->pcf8591_name, PCF8591_NAMELEN, "%s%d", ddi_driver_name(dip), instance); /* * Create a minor node corresponding to channel 0 to 3 */ for (i = 0; i < PCF8591_MAX_CHANS; i++) { if (i == 0) { (void) sprintf(name, "cputemp"); } else { (void) sprintf(name, "%d", i); } minor = PCF8591_MINOR_NUM(instance, i); if (ddi_create_minor_node(dip, name, S_IFCHR, minor, PCF8591_NODE_TYPE, NULL) == DDI_FAILURE) { ddi_remove_minor_node(dip, NULL); (void) pcf8591_do_detach(dip); return (DDI_FAILURE); } } unitp->attach_flag |= PCF8591_MINORS_CREATED; if (i2c_client_register(dip, &unitp->pcf8591_hdl) != I2C_SUCCESS) { (void) pcf8591_do_detach(dip); return (DDI_FAILURE); } unitp->attach_flag |= PCF8591_REGISTER_CLIENT; /* * We allocate a single i2c_transfer_t structure for all * i2c transactions. */ if (i2c_transfer_alloc(unitp->pcf8591_hdl, &unitp->i2c_tran, MAX_WLEN, MAX_RLEN, KM_SLEEP) != I2C_SUCCESS) { (void) pcf8591_do_detach(dip); return (DDI_FAILURE); } unitp->attach_flag |= PCF8591_ALLOC_TRANSFER; /* * The flags will be set to I2C_WR because for all reads from * the 8591 we need to also write the control byte. */ unitp->i2c_tran->i2c_flags = I2C_WR; unitp->i2c_tran->i2c_version = I2C_XFER_REV; /* * Set the analog programming mode to default. Upper nibble * in control byte. Four single ended inputs, output not enabled. */ unitp->pcf8591_inprog = PCF8591_4SINGLE | PCF8591_ANALOG_INPUT_EN; /* * Set the open flag for each channel to 0. */ for (i = 0; i < PCF8591_MAX_CHANS; i++) { unitp->pcf8591_oflag[i] = 0; } /* * Set the busy flag to 0. */ unitp->pcf8591_flags = 0; mutex_init(&unitp->umutex, NULL, MUTEX_DRIVER, NULL); cv_init(&unitp->pcf8591_cv, NULL, CV_DRIVER, NULL); unitp->attach_flag |= PCF8591_LOCK_INIT; if (pcf8591_add_kstats(unitp) != DDI_SUCCESS) { (void) pcf8591_do_detach(dip); return (DDI_FAILURE); } unitp->attach_flag |= PCF8591_KSTAT_INIT; ddi_report_dev(dip); return (DDI_SUCCESS); } /* ARGSUSED */ static int pcf8591_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result) { dev_t dev; int instance; if (infocmd == DDI_INFO_DEVT2INSTANCE) { dev = (dev_t)arg; instance = PCF8591_MINOR_TO_DEVINST(getminor(dev)); *result = (void *)(uintptr_t)instance; return (DDI_SUCCESS); } return (DDI_FAILURE); } static int pcf8591_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) { switch (cmd) { case DDI_ATTACH: return (pcf8591_do_attach(dip)); case DDI_RESUME: return (pcf8591_do_resume(dip)); default: return (DDI_FAILURE); } } static int pcf8591_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) { switch (cmd) { case DDI_DETACH: return (pcf8591_do_detach(dip)); case DDI_SUSPEND: return (pcf8591_do_suspend(dip)); default: return (DDI_FAILURE); } } static uint8_t translate_cputemp(uint8_t value) { return (_cpu_temps[value]); } static int pcf8591_add_kstats(struct pcf8591_unit *unitp) { if ((unitp->tempksp = kstat_create(I2C_PCF8591_NAME, unitp->instance, I2C_KSTAT_CPUTEMP, "misc", KSTAT_TYPE_RAW, sizeof (unitp->temp_kstats), KSTAT_FLAG_PERSISTENT | KSTAT_FLAG_WRITABLE)) == NULL) { return (DDI_FAILURE); } /* * The kstat fields are already initialized in the attach routine.. */ unitp->tempksp->ks_update = pcf8591_temp_kstat_update; unitp->tempksp->ks_private = (void *)unitp; (void) strcpy(unitp->temp_kstats.label, unitp->props.channels_description[0]); unitp->temp_kstats.type = ENVC_NETRACT_CPU_SENSOR; kstat_install(unitp->tempksp); return (DDI_SUCCESS); } static void pcf8591_delete_kstats(struct pcf8591_unit *unitp) { kstat_delete(unitp->tempksp); } static int pcf8591_temp_kstat_update(kstat_t *ksp, int rw) { struct pcf8591_unit *unitp; char *kstatp; int err = 0; int channel = 0; int warn_temp = 0; int shutdown_temp = 0; unitp = (struct pcf8591_unit *)ksp->ks_private; mutex_enter(&unitp->umutex); while (unitp->pcf8591_flags == PCF8591_BUSY) { if (cv_wait_sig(&unitp->pcf8591_cv, &unitp->umutex) <= 0) { mutex_exit(&unitp->umutex); return (EINTR); } } unitp->pcf8591_flags = PCF8591_BUSY; mutex_exit(&unitp->umutex); kstatp = (char *)ksp->ks_data; if (rw == KSTAT_WRITE) { /* check for the size of buffer */ if (ksp->ks_data_size != sizeof (unitp->temp_kstats)) { err = EIO; goto bail; } warn_temp = ((envctrl_temp_t *)kstatp)->warning_threshold; shutdown_temp = ((envctrl_temp_t *)kstatp)->shutdown_threshold; if (shutdown_temp < SHUTDOWN_TEMP_MIN || shutdown_temp > SHUTDOWN_TEMP_MAX) { err = EIO; goto bail; } if (warn_temp < 0 || shutdown_temp <= warn_temp) { err = EIO; goto bail; } /* write into kstat fields */ unitp->temp_kstats.warning_threshold = warn_temp; unitp->temp_kstats.shutdown_threshold = shutdown_temp; } else { (void) pcf8591_read_chip(unitp, channel, 1); unitp->temp_kstats.value = unitp->i2c_tran->i2c_rbuf[0]; bcopy((caddr_t)&unitp->temp_kstats, kstatp, sizeof (unitp->temp_kstats)); } bail: mutex_enter(&unitp->umutex); unitp->pcf8591_flags = 0; cv_signal(&unitp->pcf8591_cv); mutex_exit(&unitp->umutex); return (err); } static int pcf8591_read_chip(struct pcf8591_unit *unitp, uint8_t channel, int size) { int retval = I2C_SUCCESS; /* * We need to read an extra byte, since as per specification * the first byte read should be discarded. */ i2c_transfer_t *tp = unitp->i2c_tran; tp->i2c_flags = I2C_WR_RD; tp->i2c_rlen = size+1; tp->i2c_wlen = 1; tp->i2c_wbuf[0] = (unitp->pcf8591_inprog | channel); retval = nct_i2c_transfer(unitp->pcf8591_hdl, tp); if (retval == I2C_SUCCESS) { tp->i2c_rbuf[0] = translate_cputemp(tp->i2c_rbuf[1]); } if (tp->i2c_rbuf[0] == 0) { retval = I2C_FAILURE; } return (retval); } /* * Reads the properties of the pcf8591 device. */ static int pcf8591_read_props(struct pcf8591_unit *unitp) { dev_info_t *dip = unitp->dip; int i, retval = 0, prop_len; int instance = ddi_get_instance(dip); int warning_temp, shutdown_temp; uint32_t *prop_value = NULL; uchar_t *creg_prop; char *function; uint_t tblsz; #ifdef lint instance = instance; #endif /* * Check for the pcf8591_function property, and make sure it's * cputemp. */ if (ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "pcf8591_function", &function) != DDI_SUCCESS) { dbg_print(CE_WARN, "Couldn't find pcf8591_function property"); return (DDI_FAILURE); } if (strcmp(function, "cputemp") != 0) { dbg_print(CE_WARN, "pcf8591_function is not cputemp"); ddi_prop_free(function); return (DDI_FAILURE); } ddi_prop_free(function); retval = ddi_prop_lookup_string(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "name", &unitp->props.name); if (retval != DDI_PROP_SUCCESS) { return (retval); } #ifdef DEBUG else if (pcf8591_debug & 0x02) cmn_err(CE_NOTE, "pcf8591_read_props:ddi_prop_lookup_string(%s): \ found %s ", "name", unitp->props.name); #endif /* DEBUG */ retval = ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS | DDI_PROP_CANSLEEP, "reg", (caddr_t)&prop_value, &prop_len); if (retval == DDI_PROP_SUCCESS) { unitp->props.i2c_bus = (uint16_t)prop_value[0]; unitp->props.slave_address = (uint16_t)prop_value[1]; kmem_free(prop_value, prop_len); #ifdef DEBUG if (pcf8591_debug & 0x02) cmn_err(CE_NOTE, "pcf8591:ddi_getlongprop(%s) returns %d," " i2c_bus,slave=0x%x,0x%x", "reg", retval, unitp->props.i2c_bus, unitp->props.slave_address); #endif /* DEBUG */ } else { unitp->props.i2c_bus = (uint16_t)-1; unitp->props.slave_address = (uint16_t)-1; #ifdef DEBUG cmn_err(CE_WARN, "pcf8591_read_props:ddi_getlongprop(%s) returns %d," " default it to 0x%x:0x%X", "reg", retval, unitp->props.i2c_bus, unitp->props.slave_address); #endif /* DEBUG */ } (void) ddi_getproplen(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "channels-in-use", &prop_len); retval = ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "channels-in-use", (uchar_t **)&unitp->props.channels_in_use, &unitp->props.num_chans_used); if (retval == DDI_PROP_SUCCESS) { unitp->props.num_chans_used /= sizeof (pcf8591_channel_t); } else { unitp->props.num_chans_used = 0; } #ifdef DEBUG if (pcf8591_debug & 0x0002) cmn_err(CE_NOTE, "pcf8591_read_props:ddi_prop_lookup_byte_array(%s)" "returns %d\n" "\t\tlength=%d, #elements=%d", "channels-in-use", retval, prop_len, unitp->props.num_chans_used); #endif /* DEBUG */ retval = ddi_prop_lookup_string_array(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "channels-description", (char ***)&unitp->props.channels_description, (uint_t *)&prop_len); if (retval != DDI_PROP_SUCCESS) { prop_len = 0; unitp->props.channels_description = NULL; } #ifdef DEBUG if (pcf8591_debug & 0x0002) { cmn_err(CE_NOTE, "pcf8591_read_props:ddi_prop_lookup_string_array(%s)" "returns %d, length=%d", "channels-description", retval, prop_len); for (i = 0; i < prop_len; ++i) { cmn_err(CE_NOTE, "channels-description[%d]=<%s>", i, unitp->props.channels_description[i]); } } #endif /* DEBUG */ /* * The following code was borrowed from envctrltwo.c * I haven't yet investigated why the copy target is index + 2 */ retval = ddi_prop_lookup_byte_array(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "tables", &creg_prop, (uint_t *)&prop_len); if (retval != DDI_PROP_SUCCESS) { #ifdef DEBUG cmn_err(CE_WARN, "%s%d: Unable to read pcf8591 tables property", ddi_get_name(dip), instance); #endif /* DEBUG */ return (DDI_NOT_WELL_FORMED); } tblsz = (sizeof (_cpu_temps) / sizeof (uchar_t)); if (prop_len <= tblsz) { for (i = 0; i < prop_len; i++) { _cpu_temps[i] = creg_prop[i]; } } #ifdef DEBUG if (pcf8591_debug & 0x0002) cmn_err(CE_NOTE, "pcf8591_read_props: _cpu_temps size=%d; " "tables prop_len=%d\n", tblsz, prop_len); #endif /* DEBUG */ ddi_prop_free(creg_prop); /* * Read shutdown temp and warning temp properties. */ warning_temp = (int)ddi_getprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "warning-temp", PCF8591_WARNING_TEMP); shutdown_temp = (int)ddi_getprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "shutdown-temp", PCF8591_SHUTDOWN_TEMP); /* * Fill up the warning and shutdown temp values in kstat structure. */ unitp->temp_kstats.warning_threshold = warning_temp; unitp->temp_kstats.shutdown_threshold = shutdown_temp; return (DDI_PROP_SUCCESS); }