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1 /*-
2  * Copyright (c) 2006 Benno Rice.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD$");
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/bus.h>
31 #include <sys/kernel.h>
32 #include <sys/module.h>
33 #include <sys/malloc.h>
34 #include <sys/rman.h>
35 #include <sys/timetc.h>
36 #include <machine/bus.h>
37 #include <machine/intr.h>
38
39 #include <arm/xscale/pxa/pxavar.h>
40 #include <arm/xscale/pxa/pxareg.h>
41
42 struct pxa_icu_softc {
43         struct resource *       pi_res[1];
44         bus_space_tag_t         pi_bst;
45         bus_space_handle_t      pi_bsh;
46 };
47
48 static struct resource_spec pxa_icu_spec[] = {
49         { SYS_RES_MEMORY,       0,      RF_ACTIVE },
50         { -1, 0 }
51 };
52
53 static struct pxa_icu_softc *pxa_icu_softc = NULL;
54
55 static int      pxa_icu_probe(device_t);
56 static int      pxa_icu_attach(device_t);
57
58 uint32_t        pxa_icu_get_icip(void);
59 void            pxa_icu_clear_icip(int);
60 uint32_t        pxa_icu_get_icfp(void);
61 void            pxa_icu_clear_icfp(int);
62 uint32_t        pxa_icu_get_icmr(void);
63 void            pxa_icu_set_icmr(uint32_t);
64 uint32_t        pxa_icu_get_iclr(void);
65 void            pxa_icu_set_iclr(uint32_t);
66 uint32_t        pxa_icu_get_icpr(void);
67 void            pxa_icu_idle_enable(void);
68 void            pxa_icu_idle_disable(void);
69
70 extern uint32_t pxa_gpio_intr_flags[];
71
72 static int
73 pxa_icu_probe(device_t dev)
74 {
75
76         device_set_desc(dev, "Interrupt Controller");
77         return (0);
78 }
79
80 static int
81 pxa_icu_attach(device_t dev)
82 {
83         int     error;
84         struct  pxa_icu_softc *sc;
85
86         sc = (struct pxa_icu_softc *)device_get_softc(dev);
87
88         if (pxa_icu_softc != NULL)
89                 return (ENXIO);
90         pxa_icu_softc = sc;
91
92         error = bus_alloc_resources(dev, pxa_icu_spec, sc->pi_res);
93         if (error) {
94                 device_printf(dev, "could not allocate resources\n");
95                 return (ENXIO);
96         }
97
98         sc->pi_bst = rman_get_bustag(sc->pi_res[0]);
99         sc->pi_bsh = rman_get_bushandle(sc->pi_res[0]);
100
101         /* Disable all interrupts. */
102         pxa_icu_set_icmr(0);
103
104         /* Route all interrupts to IRQ rather than FIQ. */
105         pxa_icu_set_iclr(0);
106
107         /* XXX: This should move to configure_final or something. */
108         enable_interrupts(I32_bit|F32_bit);
109
110         return (0);
111 }
112
113 static device_method_t pxa_icu_methods[] = {
114         DEVMETHOD(device_probe, pxa_icu_probe),
115         DEVMETHOD(device_attach, pxa_icu_attach),
116
117         {0, 0}
118 };
119
120 static driver_t pxa_icu_driver = {
121         "icu",
122         pxa_icu_methods,
123         sizeof(struct pxa_icu_softc),
124 };
125
126 static devclass_t pxa_icu_devclass;
127
128 DRIVER_MODULE(pxaicu, pxa, pxa_icu_driver, pxa_icu_devclass, 0, 0);
129
130 int
131 arm_get_next_irq(int last __unused)
132 {
133         int     irq;
134
135         if ((irq = pxa_icu_get_icip()) != 0) {
136                 return (ffs(irq) - 1);
137         }
138
139         return (pxa_gpio_get_next_irq());
140 }
141
142 void
143 arm_mask_irq(uintptr_t nb)
144 {
145         uint32_t        mr;
146
147         if (nb >= IRQ_GPIO0) {
148                 pxa_gpio_mask_irq(nb);
149                 return;
150         }
151
152         mr = pxa_icu_get_icmr();
153         mr &= ~(1 << nb);
154         pxa_icu_set_icmr(mr);
155 }
156
157 void
158 arm_unmask_irq(uintptr_t nb)
159 {
160         uint32_t        mr;
161
162         if (nb >= IRQ_GPIO0) {
163                 pxa_gpio_unmask_irq(nb);
164                 return;
165         }
166
167         mr = pxa_icu_get_icmr();
168         mr |= (1 << nb);
169         pxa_icu_set_icmr(mr);
170 }
171
172 uint32_t
173 pxa_icu_get_icip()
174 {
175
176         return (bus_space_read_4(pxa_icu_softc->pi_bst,
177             pxa_icu_softc->pi_bsh, ICU_IP));
178 }
179
180 void
181 pxa_icu_clear_icip(int irq)
182 {
183
184         bus_space_write_4(pxa_icu_softc->pi_bst,
185             pxa_icu_softc->pi_bsh, ICU_IP, (1 << irq));
186 }
187
188 uint32_t
189 pxa_icu_get_icfp()
190 {
191
192         return (bus_space_read_4(pxa_icu_softc->pi_bst,
193             pxa_icu_softc->pi_bsh, ICU_FP));
194 }
195
196 void
197 pxa_icu_clear_icfp(int irq)
198 {
199
200         bus_space_write_4(pxa_icu_softc->pi_bst,
201             pxa_icu_softc->pi_bsh, ICU_FP, (1 << irq));
202 }
203
204 uint32_t
205 pxa_icu_get_icmr()
206 {
207
208         return (bus_space_read_4(pxa_icu_softc->pi_bst,
209             pxa_icu_softc->pi_bsh, ICU_MR));
210 }
211
212 void
213 pxa_icu_set_icmr(uint32_t val)
214 {
215
216         bus_space_write_4(pxa_icu_softc->pi_bst,
217             pxa_icu_softc->pi_bsh, ICU_MR, val);
218 }
219
220 uint32_t
221 pxa_icu_get_iclr()
222 {
223
224         return (bus_space_read_4(pxa_icu_softc->pi_bst,
225             pxa_icu_softc->pi_bsh, ICU_LR));
226 }
227
228 void
229 pxa_icu_set_iclr(uint32_t val)
230 {
231
232         bus_space_write_4(pxa_icu_softc->pi_bst,
233             pxa_icu_softc->pi_bsh, ICU_LR, val);
234 }
235
236 uint32_t
237 pxa_icu_get_icpr()
238 {
239
240         return (bus_space_read_4(pxa_icu_softc->pi_bst,
241             pxa_icu_softc->pi_bsh, ICU_PR));
242 }
243
244 void
245 pxa_icu_idle_enable()
246 {
247
248         bus_space_write_4(pxa_icu_softc->pi_bst,
249             pxa_icu_softc->pi_bsh, ICU_CR, 0x0);
250 }
251
252 void
253 pxa_icu_idle_disable()
254 {
255
256         bus_space_write_4(pxa_icu_softc->pi_bst,
257             pxa_icu_softc->pi_bsh, ICU_CR, 0x1);
258 }