tzic.c revision 250357
1248557Sray/*- 2250357Sray * Copyright (c) 2012, 2013 The FreeBSD Foundation 3248557Sray * All rights reserved. 4248557Sray * 5248557Sray * This software was developed by Oleksandr Rybalko under sponsorship 6248557Sray * from the FreeBSD Foundation. 7248557Sray * 8248557Sray * Redistribution and use in source and binary forms, with or without 9248557Sray * modification, are permitted provided that the following conditions 10248557Sray * are met: 11248557Sray * 1. Redistributions of source code must retain the above copyright 12248557Sray * notice, this list of conditions and the following disclaimer. 13248557Sray * 2. Redistributions in binary form must reproduce the above copyright 14248557Sray * notice, this list of conditions and the following disclaimer in the 15248557Sray * documentation and/or other materials provided with the distribution. 16248557Sray * 17248557Sray * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18248557Sray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19248557Sray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20248557Sray * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21248557Sray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22248557Sray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23248557Sray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24248557Sray * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25248557Sray * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26248557Sray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27248557Sray * SUCH DAMAGE. 28248557Sray */ 29248557Sray 30248557Sray#include <sys/cdefs.h> 31248557Sray__FBSDID("$FreeBSD: head/sys/arm/freescale/imx/tzic.c 250357 2013-05-08 09:42:50Z ray $"); 32248557Sray 33248557Sray#include <sys/param.h> 34248557Sray#include <sys/systm.h> 35248557Sray#include <sys/bus.h> 36248557Sray#include <sys/kernel.h> 37248557Sray#include <sys/ktr.h> 38248557Sray#include <sys/module.h> 39248557Sray#include <sys/rman.h> 40248557Sray#include <sys/pcpu.h> 41248557Sray#include <sys/proc.h> 42248557Sray#include <sys/cpuset.h> 43248557Sray#include <sys/lock.h> 44248557Sray#include <sys/mutex.h> 45248557Sray#include <machine/bus.h> 46248557Sray#include <machine/intr.h> 47248557Sray 48248557Sray#include <dev/fdt/fdt_common.h> 49248557Sray#include <dev/ofw/openfirm.h> 50248557Sray#include <dev/ofw/ofw_bus.h> 51248557Sray#include <dev/ofw/ofw_bus_subr.h> 52248557Sray 53248557Sray#include <arm/freescale/imx/imx51_tzicreg.h> 54248557Sray 55248557Sraystruct tzic_softc { 56248557Sray struct resource * tzic_res[3]; 57248557Sray bus_space_tag_t tzic_bst; 58248557Sray bus_space_handle_t tzic_bsh; 59248557Sray uint8_t ver; 60248557Sray}; 61248557Sray 62248557Sraystatic struct resource_spec tzic_spec[] = { 63248557Sray { SYS_RES_MEMORY, 0, RF_ACTIVE }, 64248557Sray { -1, 0 } 65248557Sray}; 66248557Sray 67248557Sraystatic struct tzic_softc *tzic_sc = NULL; 68248557Sray 69248557Sray#define tzic_read_4(reg) \ 70248557Sray bus_space_read_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg) 71248557Sray#define tzic_write_4(reg, val) \ 72248557Sray bus_space_write_4(tzic_sc->tzic_bst, tzic_sc->tzic_bsh, reg, val) 73248557Sray 74248557Sraystatic void tzic_post_filter(void *); 75248557Sray 76248557Sraystatic int 77248557Sraytzic_probe(device_t dev) 78248557Sray{ 79248557Sray if (ofw_bus_is_compatible(dev, "fsl,tzic")) { 80248557Sray device_set_desc(dev, "TrustZone Interrupt Controller"); 81248557Sray return (BUS_PROBE_DEFAULT); 82248557Sray } 83248557Sray return (ENXIO); 84248557Sray} 85248557Sray 86248557Sraystatic int 87248557Sraytzic_attach(device_t dev) 88248557Sray{ 89248557Sray struct tzic_softc *sc = device_get_softc(dev); 90248557Sray int i; 91248557Sray uint32_t reg; 92248557Sray 93248557Sray if (tzic_sc) 94248557Sray return (ENXIO); 95248557Sray 96248557Sray if (bus_alloc_resources(dev, tzic_spec, sc->tzic_res)) { 97248557Sray device_printf(dev, "could not allocate resources\n"); 98248557Sray return (ENXIO); 99248557Sray } 100248557Sray 101248557Sray arm_post_filter = tzic_post_filter; 102248557Sray 103248557Sray /* Distributor Interface */ 104248557Sray sc->tzic_bst = rman_get_bustag(sc->tzic_res[0]); 105248557Sray sc->tzic_bsh = rman_get_bushandle(sc->tzic_res[0]); 106248557Sray 107248557Sray tzic_sc = sc; 108248557Sray 109248557Sray reg = tzic_read_4(TZIC_INTCNTL); 110248557Sray tzic_write_4(TZIC_INTCNTL, INTCNTL_NSEN_MASK|INTCNTL_NSEN|INTCNTL_EN); 111248557Sray reg = tzic_read_4(TZIC_INTCNTL); 112248557Sray tzic_write_4(TZIC_PRIOMASK, 0x1f); 113248557Sray reg = tzic_read_4(TZIC_PRIOMASK); 114248557Sray 115248557Sray tzic_write_4(TZIC_SYNCCTRL, 0x02); 116248557Sray reg = tzic_read_4(TZIC_SYNCCTRL); 117248557Sray 118248557Sray /* route all interrupts to IRQ. secure interrupts are for FIQ */ 119248557Sray for (i = 0; i < 4; i++) 120248557Sray tzic_write_4(TZIC_INTSEC(i), 0xffffffff); 121248557Sray 122248557Sray /* disable all interrupts */ 123248557Sray for (i = 0; i < 4; i++) 124248557Sray tzic_write_4(TZIC_ENCLEAR(i), 0xffffffff); 125248557Sray 126248557Sray return (0); 127248557Sray} 128248557Sray 129248557Sraystatic device_method_t tzic_methods[] = { 130248557Sray DEVMETHOD(device_probe, tzic_probe), 131248557Sray DEVMETHOD(device_attach, tzic_attach), 132248557Sray { 0, 0 } 133248557Sray}; 134248557Sray 135248557Sraystatic driver_t tzic_driver = { 136248557Sray "tzic", 137248557Sray tzic_methods, 138248557Sray sizeof(struct tzic_softc), 139248557Sray}; 140248557Sray 141248557Sraystatic devclass_t tzic_devclass; 142248557Sray 143248557Sray/* 144248557Sray * Memory space of controller located outside of device range, so let him to 145248557Sray * attach not only to simplebus, but fdtbus also. 146248557Sray */ 147248557SrayEARLY_DRIVER_MODULE(tzic, fdtbus, tzic_driver, tzic_devclass, 0, 0, 148248557Sray BUS_PASS_INTERRUPT); 149248557SrayEARLY_DRIVER_MODULE(tzic, simplebus, tzic_driver, tzic_devclass, 0, 0, 150248557Sray BUS_PASS_INTERRUPT); 151248557Sray 152248557Sraystatic void 153248557Sraytzic_post_filter(void *arg) 154248557Sray{ 155248557Sray 156248557Sray} 157248557Sray 158248557Srayint 159248557Srayarm_get_next_irq(int last_irq) 160248557Sray{ 161248557Sray uint32_t pending; 162248557Sray int i, b; 163248557Sray 164248557Sray for (i = 0; i < 4; i++) { 165248557Sray pending = tzic_read_4(TZIC_PND(i)); 166248557Sray for (b = 0; b < 32; b++) 167248557Sray if (pending & (1 << b)) { 168248557Sray return (i * 32 + b); 169248557Sray } 170248557Sray } 171248557Sray 172248557Sray return (-1); 173248557Sray} 174248557Sray 175248557Srayvoid 176248557Srayarm_mask_irq(uintptr_t nb) 177248557Sray{ 178248557Sray 179248557Sray tzic_write_4(TZIC_ENCLEAR(nb / 32), (1UL <<(nb % 32))); 180248557Sray} 181248557Sray 182248557Srayvoid 183248557Srayarm_unmask_irq(uintptr_t nb) 184248557Sray{ 185248557Sray 186248557Sray tzic_write_4(TZIC_ENSET(nb / 32), (1UL <<(nb % 32))); 187248557Sray} 188