1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <sys/types.h> 30*0Sstevel@tonic-gate #include <sys/conf.h> 31*0Sstevel@tonic-gate #include <sys/ddi.h> 32*0Sstevel@tonic-gate #include <sys/sunddi.h> 33*0Sstevel@tonic-gate #include <sys/modctl.h> 34*0Sstevel@tonic-gate #include <sys/ddi_impldefs.h> 35*0Sstevel@tonic-gate #include <sys/kmem.h> 36*0Sstevel@tonic-gate #include <sys/devops.h> 37*0Sstevel@tonic-gate 38*0Sstevel@tonic-gate /* 39*0Sstevel@tonic-gate * Time periods, in nanoseconds 40*0Sstevel@tonic-gate */ 41*0Sstevel@tonic-gate #define PMUGPIO_TWO_SEC 2000000000LL 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate static dev_info_t *pmugpio_dip; 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate typedef struct pmugpio_state { 46*0Sstevel@tonic-gate uint8_t *pmugpio_reset_reg; 47*0Sstevel@tonic-gate ddi_acc_handle_t pmugpio_reset_reg_handle; 48*0Sstevel@tonic-gate uint8_t *pmugpio_watchdog_reg; 49*0Sstevel@tonic-gate ddi_acc_handle_t pmugpio_watchdog_reg_handle; 50*0Sstevel@tonic-gate hrtime_t hw_last_pat; 51*0Sstevel@tonic-gate } pmugpio_state_t; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate static void *pmugpio_statep; 54*0Sstevel@tonic-gate 55*0Sstevel@tonic-gate static int pmugpio_attach(dev_info_t *dip, ddi_attach_cmd_t cmd); 56*0Sstevel@tonic-gate static int pmugpio_detach(dev_info_t *dip, ddi_detach_cmd_t cmd); 57*0Sstevel@tonic-gate static int pmugpio_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, 58*0Sstevel@tonic-gate void **result); 59*0Sstevel@tonic-gate static int pmugpio_map_regs(dev_info_t *, pmugpio_state_t *); 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate struct cb_ops pmugpio_cb_ops = { 62*0Sstevel@tonic-gate nulldev, /* open */ 63*0Sstevel@tonic-gate nulldev, /* close */ 64*0Sstevel@tonic-gate nulldev, /* strategy */ 65*0Sstevel@tonic-gate nulldev, /* print */ 66*0Sstevel@tonic-gate nulldev, /* dump */ 67*0Sstevel@tonic-gate nulldev, /* read */ 68*0Sstevel@tonic-gate nulldev, /* write */ 69*0Sstevel@tonic-gate nulldev, /* ioctl */ 70*0Sstevel@tonic-gate nulldev, /* devmap */ 71*0Sstevel@tonic-gate nulldev, /* mmap */ 72*0Sstevel@tonic-gate nulldev, /* segmap */ 73*0Sstevel@tonic-gate nochpoll, /* poll */ 74*0Sstevel@tonic-gate ddi_prop_op, /* cb_prop_op */ 75*0Sstevel@tonic-gate NULL, /* streamtab */ 76*0Sstevel@tonic-gate D_MP | D_NEW 77*0Sstevel@tonic-gate }; 78*0Sstevel@tonic-gate 79*0Sstevel@tonic-gate static struct dev_ops pmugpio_ops = { 80*0Sstevel@tonic-gate DEVO_REV, /* Devo_rev */ 81*0Sstevel@tonic-gate 0, /* Refcnt */ 82*0Sstevel@tonic-gate pmugpio_info, /* Info */ 83*0Sstevel@tonic-gate nulldev, /* Identify */ 84*0Sstevel@tonic-gate nulldev, /* Probe */ 85*0Sstevel@tonic-gate pmugpio_attach, /* Attach */ 86*0Sstevel@tonic-gate pmugpio_detach, /* Detach */ 87*0Sstevel@tonic-gate nodev, /* Reset */ 88*0Sstevel@tonic-gate &pmugpio_cb_ops, /* Driver operations */ 89*0Sstevel@tonic-gate 0, /* Bus operations */ 90*0Sstevel@tonic-gate NULL /* Power */ 91*0Sstevel@tonic-gate }; 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate static struct modldrv modldrv = { 94*0Sstevel@tonic-gate &mod_driverops, /* This one is a driver */ 95*0Sstevel@tonic-gate "Pmugpio Driver %I%", /* Name of the module. */ 96*0Sstevel@tonic-gate &pmugpio_ops, /* Driver ops */ 97*0Sstevel@tonic-gate }; 98*0Sstevel@tonic-gate 99*0Sstevel@tonic-gate static struct modlinkage modlinkage = { 100*0Sstevel@tonic-gate MODREV_1, (void *)&modldrv, NULL 101*0Sstevel@tonic-gate }; 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate int 104*0Sstevel@tonic-gate _init(void) 105*0Sstevel@tonic-gate { 106*0Sstevel@tonic-gate int error; 107*0Sstevel@tonic-gate 108*0Sstevel@tonic-gate /* Initialize the soft state structures */ 109*0Sstevel@tonic-gate if ((error = ddi_soft_state_init(&pmugpio_statep, 110*0Sstevel@tonic-gate sizeof (pmugpio_state_t), 1)) != 0) { 111*0Sstevel@tonic-gate return (error); 112*0Sstevel@tonic-gate } 113*0Sstevel@tonic-gate 114*0Sstevel@tonic-gate /* Install the loadable module */ 115*0Sstevel@tonic-gate if ((error = mod_install(&modlinkage)) != 0) { 116*0Sstevel@tonic-gate ddi_soft_state_fini(&pmugpio_statep); 117*0Sstevel@tonic-gate } 118*0Sstevel@tonic-gate return (error); 119*0Sstevel@tonic-gate } 120*0Sstevel@tonic-gate 121*0Sstevel@tonic-gate int 122*0Sstevel@tonic-gate _info(struct modinfo *modinfop) 123*0Sstevel@tonic-gate { 124*0Sstevel@tonic-gate return (mod_info(&modlinkage, modinfop)); 125*0Sstevel@tonic-gate } 126*0Sstevel@tonic-gate 127*0Sstevel@tonic-gate int 128*0Sstevel@tonic-gate _fini(void) 129*0Sstevel@tonic-gate { 130*0Sstevel@tonic-gate int error; 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate error = mod_remove(&modlinkage); 133*0Sstevel@tonic-gate if (error == 0) { 134*0Sstevel@tonic-gate /* Release per module resources */ 135*0Sstevel@tonic-gate ddi_soft_state_fini(&pmugpio_statep); 136*0Sstevel@tonic-gate } 137*0Sstevel@tonic-gate return (error); 138*0Sstevel@tonic-gate } 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate static int 141*0Sstevel@tonic-gate pmugpio_attach(dev_info_t *dip, ddi_attach_cmd_t cmd) 142*0Sstevel@tonic-gate { 143*0Sstevel@tonic-gate int instance; 144*0Sstevel@tonic-gate pmugpio_state_t *pmugpio_ptr = NULL; 145*0Sstevel@tonic-gate 146*0Sstevel@tonic-gate switch (cmd) { 147*0Sstevel@tonic-gate case DDI_ATTACH: 148*0Sstevel@tonic-gate break; 149*0Sstevel@tonic-gate case DDI_RESUME: 150*0Sstevel@tonic-gate return (DDI_SUCCESS); 151*0Sstevel@tonic-gate default: 152*0Sstevel@tonic-gate return (DDI_FAILURE); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate 155*0Sstevel@tonic-gate /* Get the instance and create soft state */ 156*0Sstevel@tonic-gate instance = ddi_get_instance(dip); 157*0Sstevel@tonic-gate if (ddi_soft_state_zalloc(pmugpio_statep, instance) != 0) { 158*0Sstevel@tonic-gate return (DDI_FAILURE); 159*0Sstevel@tonic-gate } 160*0Sstevel@tonic-gate pmugpio_ptr = ddi_get_soft_state(pmugpio_statep, instance); 161*0Sstevel@tonic-gate if (pmugpio_ptr == NULL) { 162*0Sstevel@tonic-gate return (DDI_FAILURE); 163*0Sstevel@tonic-gate } 164*0Sstevel@tonic-gate 165*0Sstevel@tonic-gate if (pmugpio_map_regs(dip, pmugpio_ptr) != DDI_SUCCESS) { 166*0Sstevel@tonic-gate ddi_soft_state_free(pmugpio_statep, instance); 167*0Sstevel@tonic-gate return (DDI_FAILURE); 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate /* Display information in the banner */ 171*0Sstevel@tonic-gate ddi_report_dev(dip); 172*0Sstevel@tonic-gate 173*0Sstevel@tonic-gate /* Save the dip */ 174*0Sstevel@tonic-gate pmugpio_dip = dip; 175*0Sstevel@tonic-gate 176*0Sstevel@tonic-gate return (DDI_SUCCESS); 177*0Sstevel@tonic-gate } 178*0Sstevel@tonic-gate 179*0Sstevel@tonic-gate /* ARGSUSED */ 180*0Sstevel@tonic-gate static int 181*0Sstevel@tonic-gate pmugpio_detach(dev_info_t *dip, ddi_detach_cmd_t cmd) 182*0Sstevel@tonic-gate { 183*0Sstevel@tonic-gate /* Pointer to soft state */ 184*0Sstevel@tonic-gate switch (cmd) { 185*0Sstevel@tonic-gate case DDI_SUSPEND: 186*0Sstevel@tonic-gate return (DDI_SUCCESS); 187*0Sstevel@tonic-gate default: 188*0Sstevel@tonic-gate return (DDI_FAILURE); 189*0Sstevel@tonic-gate } 190*0Sstevel@tonic-gate } 191*0Sstevel@tonic-gate 192*0Sstevel@tonic-gate /* ARGSUSED */ 193*0Sstevel@tonic-gate static int 194*0Sstevel@tonic-gate pmugpio_info(dev_info_t *dip, ddi_info_cmd_t infocmd, 195*0Sstevel@tonic-gate void *arg, void **result) 196*0Sstevel@tonic-gate { 197*0Sstevel@tonic-gate dev_t dev; 198*0Sstevel@tonic-gate int instance, error; 199*0Sstevel@tonic-gate 200*0Sstevel@tonic-gate switch (infocmd) { 201*0Sstevel@tonic-gate case DDI_INFO_DEVT2DEVINFO: 202*0Sstevel@tonic-gate *result = (void *)pmugpio_dip; 203*0Sstevel@tonic-gate error = DDI_SUCCESS; 204*0Sstevel@tonic-gate break; 205*0Sstevel@tonic-gate case DDI_INFO_DEVT2INSTANCE: 206*0Sstevel@tonic-gate dev = (dev_t)arg; 207*0Sstevel@tonic-gate instance = getminor(dev); 208*0Sstevel@tonic-gate *result = (void *)(uintptr_t)instance; 209*0Sstevel@tonic-gate error = DDI_SUCCESS; 210*0Sstevel@tonic-gate break; 211*0Sstevel@tonic-gate default: 212*0Sstevel@tonic-gate error = DDI_FAILURE; 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate return (error); 215*0Sstevel@tonic-gate } 216*0Sstevel@tonic-gate 217*0Sstevel@tonic-gate void 218*0Sstevel@tonic-gate pmugpio_watchdog_pat(void) 219*0Sstevel@tonic-gate { 220*0Sstevel@tonic-gate dev_info_t *dip = pmugpio_dip; 221*0Sstevel@tonic-gate int instance; 222*0Sstevel@tonic-gate pmugpio_state_t *pmugpio_ptr; 223*0Sstevel@tonic-gate hrtime_t now; 224*0Sstevel@tonic-gate uint8_t value; 225*0Sstevel@tonic-gate 226*0Sstevel@tonic-gate if (dip == NULL) { 227*0Sstevel@tonic-gate return; 228*0Sstevel@tonic-gate } 229*0Sstevel@tonic-gate instance = ddi_get_instance(dip); 230*0Sstevel@tonic-gate pmugpio_ptr = ddi_get_soft_state(pmugpio_statep, instance); 231*0Sstevel@tonic-gate if (pmugpio_ptr == NULL) { 232*0Sstevel@tonic-gate return; 233*0Sstevel@tonic-gate } 234*0Sstevel@tonic-gate /* 235*0Sstevel@tonic-gate * The RMC can read interrupts either high to low OR low to high. As 236*0Sstevel@tonic-gate * a result all that needs to happen is that when we hit the time to 237*0Sstevel@tonic-gate * send an signal we simply need to change the state. 238*0Sstevel@tonic-gate */ 239*0Sstevel@tonic-gate now = gethrtime(); 240*0Sstevel@tonic-gate if ((now - pmugpio_ptr->hw_last_pat) >= PMUGPIO_TWO_SEC) { 241*0Sstevel@tonic-gate /* 242*0Sstevel@tonic-gate * fetch current reg value and invert it 243*0Sstevel@tonic-gate */ 244*0Sstevel@tonic-gate value = (uint8_t)(0xff ^ 245*0Sstevel@tonic-gate ddi_get8(pmugpio_ptr->pmugpio_watchdog_reg_handle, 246*0Sstevel@tonic-gate pmugpio_ptr->pmugpio_watchdog_reg)); 247*0Sstevel@tonic-gate 248*0Sstevel@tonic-gate ddi_put8(pmugpio_ptr->pmugpio_watchdog_reg_handle, 249*0Sstevel@tonic-gate pmugpio_ptr->pmugpio_watchdog_reg, value); 250*0Sstevel@tonic-gate pmugpio_ptr->hw_last_pat = now; 251*0Sstevel@tonic-gate } 252*0Sstevel@tonic-gate } 253*0Sstevel@tonic-gate 254*0Sstevel@tonic-gate void 255*0Sstevel@tonic-gate pmugpio_reset(void) 256*0Sstevel@tonic-gate { 257*0Sstevel@tonic-gate dev_info_t *dip = pmugpio_dip; 258*0Sstevel@tonic-gate int instance; 259*0Sstevel@tonic-gate pmugpio_state_t *pmugpio_ptr; 260*0Sstevel@tonic-gate 261*0Sstevel@tonic-gate if (dip == NULL) { 262*0Sstevel@tonic-gate return; 263*0Sstevel@tonic-gate } 264*0Sstevel@tonic-gate instance = ddi_get_instance(dip); 265*0Sstevel@tonic-gate pmugpio_ptr = ddi_get_soft_state(pmugpio_statep, instance); 266*0Sstevel@tonic-gate if (pmugpio_ptr == NULL) { 267*0Sstevel@tonic-gate return; 268*0Sstevel@tonic-gate } 269*0Sstevel@tonic-gate 270*0Sstevel@tonic-gate /* 271*0Sstevel@tonic-gate * turn all bits on then off again - pmubus nexus will ensure 272*0Sstevel@tonic-gate * that only unmasked bit is affected 273*0Sstevel@tonic-gate */ 274*0Sstevel@tonic-gate ddi_put8(pmugpio_ptr->pmugpio_reset_reg_handle, 275*0Sstevel@tonic-gate pmugpio_ptr->pmugpio_reset_reg, ~0); 276*0Sstevel@tonic-gate ddi_put8(pmugpio_ptr->pmugpio_reset_reg_handle, 277*0Sstevel@tonic-gate pmugpio_ptr->pmugpio_reset_reg, 0); 278*0Sstevel@tonic-gate } 279*0Sstevel@tonic-gate 280*0Sstevel@tonic-gate static int 281*0Sstevel@tonic-gate pmugpio_map_regs(dev_info_t *dip, pmugpio_state_t *pmugpio_ptr) 282*0Sstevel@tonic-gate { 283*0Sstevel@tonic-gate ddi_device_acc_attr_t attr; 284*0Sstevel@tonic-gate 285*0Sstevel@tonic-gate /* The host controller will be little endian */ 286*0Sstevel@tonic-gate attr.devacc_attr_version = DDI_DEVICE_ATTR_V0; 287*0Sstevel@tonic-gate attr.devacc_attr_endian_flags = DDI_STRUCTURE_LE_ACC; 288*0Sstevel@tonic-gate attr.devacc_attr_dataorder = DDI_STRICTORDER_ACC; 289*0Sstevel@tonic-gate 290*0Sstevel@tonic-gate if (ddi_regs_map_setup(dip, 1, 291*0Sstevel@tonic-gate (caddr_t *)&pmugpio_ptr->pmugpio_watchdog_reg, 0, 1, &attr, 292*0Sstevel@tonic-gate &pmugpio_ptr->pmugpio_watchdog_reg_handle) != DDI_SUCCESS) { 293*0Sstevel@tonic-gate return (DDI_FAILURE); 294*0Sstevel@tonic-gate } 295*0Sstevel@tonic-gate if (ddi_regs_map_setup(dip, 0, 296*0Sstevel@tonic-gate (caddr_t *)&pmugpio_ptr->pmugpio_reset_reg, 0, 1, &attr, 297*0Sstevel@tonic-gate &pmugpio_ptr->pmugpio_reset_reg_handle) != DDI_SUCCESS) { 298*0Sstevel@tonic-gate ddi_regs_map_free(&pmugpio_ptr->pmugpio_watchdog_reg_handle); 299*0Sstevel@tonic-gate return (DDI_FAILURE); 300*0Sstevel@tonic-gate } 301*0Sstevel@tonic-gate return (DDI_SUCCESS); 302*0Sstevel@tonic-gate } 303