2 * Copyright (c) 2012 Damjan Marion <dmarion@Freebsd.org>
5 * Based on OMAP3 INTC code by Ben Gray
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include "opt_platform.h"
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/kernel.h>
40 #include <sys/module.h>
43 #include <machine/bus.h>
44 #include <machine/intr.h>
46 #include <dev/ofw/openfirm.h>
47 #include <dev/ofw/ofw_bus.h>
48 #include <dev/ofw/ofw_bus_subr.h>
52 #define INTC_REVISION 0x00
53 #define INTC_SYSCONFIG 0x10
54 #define INTC_SYSSTATUS 0x14
55 #define INTC_SIR_IRQ 0x40
56 #define INTC_CONTROL 0x48
57 #define INTC_THRESHOLD 0x68
58 #define INTC_MIR_CLEAR(x) (0x88 + ((x) * 0x20))
59 #define INTC_MIR_SET(x) (0x8C + ((x) * 0x20))
60 #define INTC_ISR_SET(x) (0x90 + ((x) * 0x20))
61 #define INTC_ISR_CLEAR(x) (0x94 + ((x) * 0x20))
63 #define INTC_SIR_SPURIOUS_MASK 0xffffff80
64 #define INTC_SIR_ACTIVE_MASK 0x7f
66 #define INTC_NIRQS 128
68 struct ti_aintc_irqsrc {
69 struct intr_irqsrc tai_isrc;
73 struct ti_aintc_softc {
75 struct resource * aintc_res[3];
76 bus_space_tag_t aintc_bst;
77 bus_space_handle_t aintc_bsh;
79 struct ti_aintc_irqsrc aintc_isrcs[INTC_NIRQS];
82 static struct resource_spec ti_aintc_spec[] = {
83 { SYS_RES_MEMORY, 0, RF_ACTIVE },
87 #define aintc_read_4(_sc, reg) \
88 bus_space_read_4((_sc)->aintc_bst, (_sc)->aintc_bsh, (reg))
89 #define aintc_write_4(_sc, reg, val) \
90 bus_space_write_4((_sc)->aintc_bst, (_sc)->aintc_bsh, (reg), (val))
92 /* List of compatible strings for FDT tree */
93 static struct ofw_compat_data compat_data[] = {
94 {"ti,am33xx-intc", 1},
100 ti_aintc_irq_eoi(struct ti_aintc_softc *sc)
103 aintc_write_4(sc, INTC_CONTROL, 1);
107 ti_aintc_irq_mask(struct ti_aintc_softc *sc, u_int irq)
110 aintc_write_4(sc, INTC_MIR_SET(irq >> 5), (1UL << (irq & 0x1F)));
114 ti_aintc_irq_unmask(struct ti_aintc_softc *sc, u_int irq)
117 aintc_write_4(sc, INTC_MIR_CLEAR(irq >> 5), (1UL << (irq & 0x1F)));
121 ti_aintc_intr(void *arg)
124 struct ti_aintc_softc *sc = arg;
126 /* Get active interrupt */
127 irq = aintc_read_4(sc, INTC_SIR_IRQ);
128 if ((irq & INTC_SIR_SPURIOUS_MASK) != 0) {
129 device_printf(sc->sc_dev,
130 "Spurious interrupt detected (0x%08x)\n", irq);
131 ti_aintc_irq_eoi(sc);
132 return (FILTER_HANDLED);
135 /* Only level-sensitive interrupts detection is supported. */
136 irq &= INTC_SIR_ACTIVE_MASK;
137 if (intr_isrc_dispatch(&sc->aintc_isrcs[irq].tai_isrc,
138 curthread->td_intr_frame) != 0) {
139 ti_aintc_irq_mask(sc, irq);
140 ti_aintc_irq_eoi(sc);
141 device_printf(sc->sc_dev, "Stray irq %u disabled\n", irq);
144 arm_irq_memory_barrier(irq); /* XXX */
145 return (FILTER_HANDLED);
149 ti_aintc_enable_intr(device_t dev, struct intr_irqsrc *isrc)
151 u_int irq = ((struct ti_aintc_irqsrc *)isrc)->tai_irq;
152 struct ti_aintc_softc *sc = device_get_softc(dev);
154 arm_irq_memory_barrier(irq);
155 ti_aintc_irq_unmask(sc, irq);
159 ti_aintc_disable_intr(device_t dev, struct intr_irqsrc *isrc)
161 u_int irq = ((struct ti_aintc_irqsrc *)isrc)->tai_irq;
162 struct ti_aintc_softc *sc = device_get_softc(dev);
164 ti_aintc_irq_mask(sc, irq);
168 ti_aintc_map_intr(device_t dev, struct intr_map_data *data,
169 struct intr_irqsrc **isrcp)
171 struct intr_map_data_fdt *daf;
172 struct ti_aintc_softc *sc;
174 if (data->type != INTR_MAP_DATA_FDT)
177 daf = (struct intr_map_data_fdt *)data;
178 if (daf->ncells != 1 || daf->cells[0] >= INTC_NIRQS)
181 sc = device_get_softc(dev);
182 *isrcp = &sc->aintc_isrcs[daf->cells[0]].tai_isrc;
187 ti_aintc_pre_ithread(device_t dev, struct intr_irqsrc *isrc)
189 u_int irq = ((struct ti_aintc_irqsrc *)isrc)->tai_irq;
190 struct ti_aintc_softc *sc = device_get_softc(dev);
192 ti_aintc_irq_mask(sc, irq);
193 ti_aintc_irq_eoi(sc);
197 ti_aintc_post_ithread(device_t dev, struct intr_irqsrc *isrc)
200 ti_aintc_enable_intr(dev, isrc);
204 ti_aintc_post_filter(device_t dev, struct intr_irqsrc *isrc)
207 ti_aintc_irq_eoi(device_get_softc(dev));
211 ti_aintc_pic_attach(struct ti_aintc_softc *sc)
213 struct intr_pic *pic;
219 name = device_get_nameunit(sc->sc_dev);
220 for (irq = 0; irq < INTC_NIRQS; irq++) {
221 sc->aintc_isrcs[irq].tai_irq = irq;
223 error = intr_isrc_register(&sc->aintc_isrcs[irq].tai_isrc,
224 sc->sc_dev, 0, "%s,%u", name, irq);
229 xref = OF_xref_from_node(ofw_bus_get_node(sc->sc_dev));
230 pic = intr_pic_register(sc->sc_dev, xref);
234 return (intr_pic_claim_root(sc->sc_dev, xref, ti_aintc_intr, sc, 0));
238 ti_aintc_probe(device_t dev)
240 if (!ofw_bus_status_okay(dev))
243 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
246 device_set_desc(dev, "TI AINTC Interrupt Controller");
247 return (BUS_PROBE_DEFAULT);
251 ti_aintc_attach(device_t dev)
253 struct ti_aintc_softc *sc = device_get_softc(dev);
258 if (bus_alloc_resources(dev, ti_aintc_spec, sc->aintc_res)) {
259 device_printf(dev, "could not allocate resources\n");
263 sc->aintc_bst = rman_get_bustag(sc->aintc_res[0]);
264 sc->aintc_bsh = rman_get_bushandle(sc->aintc_res[0]);
266 x = aintc_read_4(sc, INTC_REVISION);
267 device_printf(dev, "Revision %u.%u\n",(x >> 4) & 0xF, x & 0xF);
270 aintc_write_4(sc, INTC_SYSCONFIG, 2);
272 /* Wait for reset to complete */
273 while(!(aintc_read_4(sc, INTC_SYSSTATUS) & 1));
275 /*Set Priority Threshold */
276 aintc_write_4(sc, INTC_THRESHOLD, 0xFF);
278 if (ti_aintc_pic_attach(sc) != 0) {
279 device_printf(dev, "could not attach PIC\n");
285 static device_method_t ti_aintc_methods[] = {
286 DEVMETHOD(device_probe, ti_aintc_probe),
287 DEVMETHOD(device_attach, ti_aintc_attach),
289 DEVMETHOD(pic_disable_intr, ti_aintc_disable_intr),
290 DEVMETHOD(pic_enable_intr, ti_aintc_enable_intr),
291 DEVMETHOD(pic_map_intr, ti_aintc_map_intr),
292 DEVMETHOD(pic_post_filter, ti_aintc_post_filter),
293 DEVMETHOD(pic_post_ithread, ti_aintc_post_ithread),
294 DEVMETHOD(pic_pre_ithread, ti_aintc_pre_ithread),
299 static driver_t ti_aintc_driver = {
302 sizeof(struct ti_aintc_softc),
305 static devclass_t ti_aintc_devclass;
307 EARLY_DRIVER_MODULE(ti_aintc, simplebus, ti_aintc_driver, ti_aintc_devclass,
308 0, 0, BUS_PASS_INTERRUPT + BUS_PASS_ORDER_MIDDLE);
309 SIMPLEBUS_PNP_INFO(compat_data);