1157091Simp/*- 2157091Simp * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3157091Simp * 4157091Simp * Redistribution and use in source and binary forms, with or without 5157091Simp * modification, are permitted provided that the following conditions 6157091Simp * are met: 7157091Simp * 1. Redistributions of source code must retain the above copyright 8157091Simp * notice, this list of conditions and the following disclaimer. 9157091Simp * 2. Redistributions in binary form must reproduce the above copyright 10157091Simp * notice, this list of conditions and the following disclaimer in the 11157091Simp * documentation and/or other materials provided with the distribution. 12157091Simp * 13185265Simp * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14185265Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15185265Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16185265Simp * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17185265Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18185265Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19185265Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20185265Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21185265Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22185265Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23185265Simp * SUCH DAMAGE. 24157091Simp */ 25157091Simp 26157091Simp#include <sys/cdefs.h> 27157091Simp__FBSDID("$FreeBSD: releng/10.3/sys/arm/at91/at91_ssc.c 236989 2012-06-13 04:52:19Z imp $"); 28157091Simp 29157091Simp#include <sys/param.h> 30157091Simp#include <sys/systm.h> 31157091Simp#include <sys/bus.h> 32157091Simp#include <sys/conf.h> 33157091Simp#include <sys/kernel.h> 34157091Simp#include <sys/lock.h> 35157091Simp#include <sys/module.h> 36157091Simp#include <sys/mutex.h> 37157091Simp#include <sys/rman.h> 38157091Simp#include <machine/bus.h> 39157091Simp 40157091Simp#include <arm/at91/at91_sscreg.h> 41157091Simp 42157091Simpstruct at91_ssc_softc 43157091Simp{ 44157091Simp device_t dev; /* Myself */ 45157091Simp void *intrhand; /* Interrupt handle */ 46157091Simp struct resource *irq_res; /* IRQ resource */ 47157091Simp struct resource *mem_res; /* Memory resource */ 48157091Simp struct mtx sc_mtx; /* basically a perimeter lock */ 49157091Simp struct cdev *cdev; 50157091Simp int flags; 51157091Simp#define OPENED 1 52157091Simp}; 53157091Simp 54157091Simpstatic inline uint32_t 55157091SimpRD4(struct at91_ssc_softc *sc, bus_size_t off) 56157091Simp{ 57157091Simp return bus_read_4(sc->mem_res, off); 58157091Simp} 59157091Simp 60157091Simpstatic inline void 61157091SimpWR4(struct at91_ssc_softc *sc, bus_size_t off, uint32_t val) 62157091Simp{ 63157091Simp bus_write_4(sc->mem_res, off, val); 64157091Simp} 65157091Simp 66157091Simp#define AT91_SSC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 67157091Simp#define AT91_SSC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 68157091Simp#define AT91_SSC_LOCK_INIT(_sc) \ 69160365Simp mtx_init(&(_sc)->sc_mtx, device_get_nameunit((_sc)->dev), \ 70157091Simp "ssc", MTX_DEF) 71160365Simp#define AT91_SSC_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx); 72160365Simp#define AT91_SSC_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED); 73160365Simp#define AT91_SSC_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_NOTOWNED); 74157091Simp#define CDEV2SOFTC(dev) ((dev)->si_drv1) 75157091Simp 76157091Simpstatic devclass_t at91_ssc_devclass; 77157091Simp 78157091Simp/* bus entry points */ 79157091Simp 80157091Simpstatic int at91_ssc_probe(device_t dev); 81157091Simpstatic int at91_ssc_attach(device_t dev); 82157091Simpstatic int at91_ssc_detach(device_t dev); 83157091Simpstatic void at91_ssc_intr(void *); 84157091Simp 85157091Simp/* helper routines */ 86157091Simpstatic int at91_ssc_activate(device_t dev); 87157091Simpstatic void at91_ssc_deactivate(device_t dev); 88157091Simp 89157091Simp/* cdev routines */ 90157091Simpstatic d_open_t at91_ssc_open; 91157091Simpstatic d_close_t at91_ssc_close; 92163525Simpstatic d_read_t at91_ssc_read; 93163525Simpstatic d_write_t at91_ssc_write; 94157091Simp 95157091Simpstatic struct cdevsw at91_ssc_cdevsw = 96157091Simp{ 97157091Simp .d_version = D_VERSION, 98157091Simp .d_open = at91_ssc_open, 99157091Simp .d_close = at91_ssc_close, 100163525Simp .d_read = at91_ssc_read, 101163525Simp .d_write = at91_ssc_write, 102157091Simp}; 103157091Simp 104157091Simpstatic int 105157091Simpat91_ssc_probe(device_t dev) 106157091Simp{ 107157091Simp device_set_desc(dev, "SSC"); 108157091Simp return (0); 109157091Simp} 110157091Simp 111157091Simpstatic int 112157091Simpat91_ssc_attach(device_t dev) 113157091Simp{ 114157091Simp struct at91_ssc_softc *sc = device_get_softc(dev); 115157091Simp int err; 116157091Simp 117157091Simp sc->dev = dev; 118157091Simp err = at91_ssc_activate(dev); 119157091Simp if (err) 120157091Simp goto out; 121157091Simp 122157091Simp AT91_SSC_LOCK_INIT(sc); 123157091Simp 124157091Simp /* 125157091Simp * Activate the interrupt 126157091Simp */ 127157091Simp err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE, 128166901Spiso NULL, at91_ssc_intr, sc, &sc->intrhand); 129157091Simp if (err) { 130157091Simp AT91_SSC_LOCK_DESTROY(sc); 131157091Simp goto out; 132157091Simp } 133157091Simp sc->cdev = make_dev(&at91_ssc_cdevsw, device_get_unit(dev), UID_ROOT, 134157091Simp GID_WHEEL, 0600, "ssc%d", device_get_unit(dev)); 135157091Simp if (sc->cdev == NULL) { 136157091Simp err = ENOMEM; 137157091Simp goto out; 138157091Simp } 139157091Simp sc->cdev->si_drv1 = sc; 140163525Simp 141163525Simp // Init for TSC needs 142163525Simp WR4(sc, SSC_CR, SSC_CR_SWRST); 143163525Simp WR4(sc, SSC_CMR, 0); // clock divider unused 144163525Simp WR4(sc, SSC_RCMR, 145163525Simp SSC_RCMR_CKS_RK | SSC_RCMR_CKO_NONE | SSC_RCMR_START_FALL_EDGE_RF); 146163525Simp WR4(sc, SSC_RFMR, 147163525Simp 0x1f | SSC_RFMR_MSFBF | SSC_RFMR_FSOS_NONE); 148163525Simp WR4(sc, SSC_TCMR, 149163525Simp SSC_TCMR_CKS_TK | SSC_TCMR_CKO_NONE | SSC_RCMR_START_CONT); 150163525Simp WR4(sc, SSC_TFMR, 151163525Simp 0x1f | SSC_TFMR_DATDEF | SSC_TFMR_MSFBF | SSC_TFMR_FSOS_NEG_PULSE); 152163525Simp 153225882Skevloout: 154157091Simp if (err) 155157091Simp at91_ssc_deactivate(dev); 156157091Simp return (err); 157157091Simp} 158157091Simp 159157091Simpstatic int 160157091Simpat91_ssc_detach(device_t dev) 161157091Simp{ 162157091Simp return (EBUSY); /* XXX */ 163157091Simp} 164157091Simp 165157091Simpstatic int 166157091Simpat91_ssc_activate(device_t dev) 167157091Simp{ 168157091Simp struct at91_ssc_softc *sc; 169157091Simp int rid; 170157091Simp 171157091Simp sc = device_get_softc(dev); 172157091Simp rid = 0; 173157091Simp sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 174157091Simp RF_ACTIVE); 175157091Simp if (sc->mem_res == NULL) 176157091Simp goto errout; 177157091Simp rid = 0; 178157091Simp sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 179157091Simp RF_ACTIVE); 180163525Simp if (sc->irq_res == NULL) 181157091Simp goto errout; 182157091Simp return (0); 183157091Simperrout: 184157091Simp at91_ssc_deactivate(dev); 185157091Simp return (ENOMEM); 186157091Simp} 187157091Simp 188157091Simpstatic void 189157091Simpat91_ssc_deactivate(device_t dev) 190157091Simp{ 191157091Simp struct at91_ssc_softc *sc; 192157091Simp 193157091Simp sc = device_get_softc(dev); 194157091Simp if (sc->intrhand) 195157091Simp bus_teardown_intr(dev, sc->irq_res, sc->intrhand); 196157091Simp sc->intrhand = 0; 197157091Simp bus_generic_detach(sc->dev); 198157091Simp if (sc->mem_res) 199157091Simp bus_release_resource(dev, SYS_RES_IOPORT, 200157091Simp rman_get_rid(sc->mem_res), sc->mem_res); 201157091Simp sc->mem_res = 0; 202157091Simp if (sc->irq_res) 203157091Simp bus_release_resource(dev, SYS_RES_IRQ, 204157091Simp rman_get_rid(sc->irq_res), sc->irq_res); 205157091Simp sc->irq_res = 0; 206157091Simp return; 207157091Simp} 208157091Simp 209157091Simpstatic void 210157091Simpat91_ssc_intr(void *xsc) 211157091Simp{ 212157091Simp struct at91_ssc_softc *sc = xsc; 213157091Simp wakeup(sc); 214157091Simp return; 215157091Simp} 216157091Simp 217236989Simpstatic int 218157091Simpat91_ssc_open(struct cdev *dev, int oflags, int devtype, struct thread *td) 219157091Simp{ 220157091Simp struct at91_ssc_softc *sc; 221157091Simp 222157091Simp sc = CDEV2SOFTC(dev); 223157091Simp AT91_SSC_LOCK(sc); 224157091Simp if (!(sc->flags & OPENED)) { 225157091Simp sc->flags |= OPENED; 226157091Simp } 227157091Simp AT91_SSC_UNLOCK(sc); 228157091Simp return (0); 229157091Simp} 230157091Simp 231157091Simpstatic int 232157091Simpat91_ssc_close(struct cdev *dev, int fflag, int devtype, struct thread *td) 233157091Simp{ 234157091Simp struct at91_ssc_softc *sc; 235157091Simp 236157091Simp sc = CDEV2SOFTC(dev); 237157091Simp AT91_SSC_LOCK(sc); 238157091Simp sc->flags &= ~OPENED; 239157091Simp AT91_SSC_UNLOCK(sc); 240157091Simp return (0); 241157091Simp} 242157091Simp 243157091Simpstatic int 244163525Simpat91_ssc_read(struct cdev *dev, struct uio *uio, int flag) 245157091Simp{ 246163525Simp return EIO; 247157091Simp} 248157091Simp 249163525Simpstatic int 250163525Simpat91_ssc_write(struct cdev *dev, struct uio *uio, int flag) 251163525Simp{ 252163525Simp return EIO; 253163525Simp} 254163525Simp 255157091Simpstatic device_method_t at91_ssc_methods[] = { 256157091Simp /* Device interface */ 257157091Simp DEVMETHOD(device_probe, at91_ssc_probe), 258157091Simp DEVMETHOD(device_attach, at91_ssc_attach), 259157091Simp DEVMETHOD(device_detach, at91_ssc_detach), 260157091Simp 261157091Simp { 0, 0 } 262157091Simp}; 263157091Simp 264157091Simpstatic driver_t at91_ssc_driver = { 265157091Simp "at91_ssc", 266157091Simp at91_ssc_methods, 267157091Simp sizeof(struct at91_ssc_softc), 268157091Simp}; 269157091Simp 270157091SimpDRIVER_MODULE(at91_ssc, atmelarm, at91_ssc_driver, at91_ssc_devclass, 0, 0); 271