1 /* $NetBSD: ixp425_pci.c,v 1.5 2006/04/10 03:36:03 simonb Exp $ */
2
3 /*
4 * Copyright (c) 2003
5 * Ichiro FUKUHARA <ichiro@ichiro.org>.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Ichiro FUKUHARA.
19 * 4. The name of the company nor the name of the author may be used to
20 * endorse or promote products derived from this software without specific
21 * prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD: releng/10.1/sys/arm/xscale/ixp425/ixp425_pci.c 259329 2013-12-13 20:43:11Z ian $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/malloc.h>
42 #define _ARM32_BUS_DMA_PRIVATE
43 #include <sys/bus.h>
44 #include <sys/kernel.h>
45 #include <sys/module.h>
46 #include <sys/rman.h>
47
48 #include <dev/pci/pcivar.h>
49
50 #include <machine/bus.h>
51 #include <machine/cpu.h>
52 #include <machine/pcb.h>
53
54 #include <vm/vm.h>
55 #include <vm/pmap.h>
56 #include <vm/vm_extern.h>
57
58 #include <arm/xscale/ixp425/ixp425reg.h>
59 #include <arm/xscale/ixp425/ixp425var.h>
60
61 #include <dev/pci/pcib_private.h>
62 #include "pcib_if.h"
63
64 #include <dev/pci/pcireg.h>
65 extern struct ixp425_softc *ixp425_softc;
66
67 #define PCI_CSR_WRITE_4(sc, reg, data) \
68 bus_write_4(sc->sc_csr, reg, data)
69
70 #define PCI_CSR_READ_4(sc, reg) \
71 bus_read_4(sc->sc_csr, reg)
72
73 #define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit)
74 #define PCI_CONF_UNLOCK(s) restore_interrupts((s))
75
76 static device_probe_t ixppcib_probe;
77 static device_attach_t ixppcib_attach;
78 static bus_read_ivar_t ixppcib_read_ivar;
79 static bus_write_ivar_t ixppcib_write_ivar;
80 static bus_setup_intr_t ixppcib_setup_intr;
81 static bus_teardown_intr_t ixppcib_teardown_intr;
82 static bus_alloc_resource_t ixppcib_alloc_resource;
83 static bus_activate_resource_t ixppcib_activate_resource;
84 static bus_deactivate_resource_t ixppcib_deactivate_resource;
85 static bus_release_resource_t ixppcib_release_resource;
86 static pcib_maxslots_t ixppcib_maxslots;
87 static pcib_read_config_t ixppcib_read_config;
88 static pcib_write_config_t ixppcib_write_config;
89 static pcib_route_interrupt_t ixppcib_route_interrupt;
90
91 static int
92 ixppcib_probe(device_t dev)
93 {
94 device_set_desc(dev, "IXP4XX PCI Bus");
95 return (0);
96 }
97
98 static void
99 ixp425_pci_conf_reg_write(struct ixppcib_softc *sc, uint32_t reg,
100 uint32_t data)
101 {
102 PCI_CSR_WRITE_4(sc, PCI_CRP_AD_CBE, ((reg & ~3) | COMMAND_CRP_WRITE));
103 PCI_CSR_WRITE_4(sc, PCI_CRP_AD_WDATA, data);
104 }
105
106 static int
107 ixppcib_attach(device_t dev)
108 {
109 int rid;
110 struct ixppcib_softc *sc;
111
112 sc = device_get_softc(dev);
113
114 rid = 0;
115 sc->sc_csr = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
116 IXP425_PCI_HWBASE, IXP425_PCI_HWBASE + IXP425_PCI_SIZE,
117 IXP425_PCI_SIZE, RF_ACTIVE);
118 if (sc->sc_csr == NULL)
119 panic("cannot allocate PCI CSR registers");
120
121 ixp425_md_attach(dev);
122 /* always setup the base, incase another OS messes w/ it */
123 PCI_CSR_WRITE_4(sc, PCI_PCIMEMBASE, 0x48494a4b);
124
125 rid = 0;
126 sc->sc_mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
127 IXP425_PCI_MEM_HWBASE, IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE,
128 IXP425_PCI_MEM_SIZE, RF_ACTIVE);
129 if (sc->sc_mem == NULL)
130 panic("cannot allocate PCI MEM space");
131
132 /* NB: PCI dma window is 64M so anything above must be bounced */
133 if (bus_dma_tag_create(NULL, 1, 0, IXP425_AHB_OFFSET + 64 * 1024 * 1024,
134 BUS_SPACE_MAXADDR, NULL, NULL, 0xffffffff, 0xff, 0xffffffff, 0,
135 NULL, NULL, &sc->sc_dmat))
136 panic("couldn't create the PCI dma tag !");
137 /*
138 * The PCI bus can only address 64MB. However, due to the way our
139 * implementation of busdma works, busdma can't tell if a device
140 * is a PCI device or not. So defaults to the PCI dma tag, which
141 * restrict the DMA'able memory to the first 64MB, and explicitely
142 * create less restrictive tags for non-PCI devices.
143 */
144 arm_root_dma_tag = sc->sc_dmat;
145 /*
146 * Initialize the bus space tags.
147 */
148 ixp425_io_bs_init(&sc->sc_pci_iot, sc);
149 ixp425_mem_bs_init(&sc->sc_pci_memt, sc);
150
151 sc->sc_dev = dev;
152
153 /* Initialize memory and i/o rmans. */
154 sc->sc_io_rman.rm_type = RMAN_ARRAY;
155 sc->sc_io_rman.rm_descr = "IXP4XX PCI I/O Ports";
156 if (rman_init(&sc->sc_io_rman) != 0 ||
157 rman_manage_region(&sc->sc_io_rman, 0,
158 IXP425_PCI_IO_SIZE) != 0) {
159 panic("ixppcib_probe: failed to set up I/O rman");
160 }
161
162 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
163 sc->sc_mem_rman.rm_descr = "IXP4XX PCI Memory";
164 if (rman_init(&sc->sc_mem_rman) != 0 ||
165 rman_manage_region(&sc->sc_mem_rman, IXP425_PCI_MEM_HWBASE,
166 IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE) != 0) {
167 panic("ixppcib_probe: failed to set up memory rman");
168 }
169
170 /*
171 * PCI->AHB address translation
172 * begin at the physical memory start + OFFSET
173 */
174 PCI_CSR_WRITE_4(sc, PCI_AHBMEMBASE,
175 (IXP425_AHB_OFFSET & 0xFF000000) +
176 ((IXP425_AHB_OFFSET & 0xFF000000) >> 8) +
177 ((IXP425_AHB_OFFSET & 0xFF000000) >> 16) +
178 ((IXP425_AHB_OFFSET & 0xFF000000) >> 24) +
179 0x00010203);
180
181 #define IXPPCIB_WRITE_CONF(sc, reg, val) \
182 ixp425_pci_conf_reg_write(sc, reg, val)
183 /* Write Mapping registers PCI Configuration Registers */
184 /* Base Address 0 - 3 */
185 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR0, IXP425_AHB_OFFSET + 0x00000000);
186 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR1, IXP425_AHB_OFFSET + 0x01000000);
187 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR2, IXP425_AHB_OFFSET + 0x02000000);
188 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR3, IXP425_AHB_OFFSET + 0x03000000);
189
190 /* Base Address 4 */
191 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR4, 0xffffffff);
192
193 /* Base Address 5 */
194 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR5, 0x00000000);
195
196 /* Assert some PCI errors */
197 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_AHBE | ISR_PPE | ISR_PFE | ISR_PSE);
198
199 #ifdef __ARMEB__
200 /*
201 * Set up byte lane swapping between little-endian PCI
202 * and the big-endian AHB bus
203 */
204 PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE | CSR_PDS);
205 #else
206 PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE);
207 #endif
208
209 /*
210 * Enable bus mastering and I/O,memory access
211 */
212 IXPPCIB_WRITE_CONF(sc, PCIR_COMMAND,
213 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
214
215 /*
216 * Wait some more to ensure PCI devices have stabilised.
217 */
218 DELAY(50000);
219
220 device_add_child(dev, "pci", -1);
221 return (bus_generic_attach(dev));
222 }
223
224 static int
225 ixppcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
226 {
227 struct ixppcib_softc *sc;
228
229 sc = device_get_softc(dev);
230 switch (which) {
231 case PCIB_IVAR_DOMAIN:
232 *result = 0;
233 return (0);
234 case PCIB_IVAR_BUS:
235 *result = sc->sc_bus;
236 return (0);
237 }
238
239 return (ENOENT);
240 }
241
242 static int
243 ixppcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
244 {
245 struct ixppcib_softc *sc;
246
247 sc = device_get_softc(dev);
248 switch (which) {
249 case PCIB_IVAR_DOMAIN:
250 return (EINVAL);
251 case PCIB_IVAR_BUS:
252 sc->sc_bus = value;
253 return (0);
254 }
255
256 return (ENOENT);
257 }
258
259 static int
260 ixppcib_setup_intr(device_t dev, device_t child, struct resource *ires,
261 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg,
262 void **cookiep)
263 {
264
265 return (BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
266 filt, intr, arg, cookiep));
267 }
268
269 static int
270 ixppcib_teardown_intr(device_t dev, device_t child, struct resource *vec,
271 void *cookie)
272 {
273
274 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, vec, cookie));
275 }
276
277 static struct resource *
278 ixppcib_alloc_resource(device_t bus, device_t child, int type, int *rid,
279 u_long start, u_long end, u_long count, u_int flags)
280 {
281 struct ixppcib_softc *sc = device_get_softc(bus);
282 struct rman *rmanp;
283 struct resource *rv;
284
285 rv = NULL;
286 switch (type) {
287 case SYS_RES_IRQ:
288 rmanp = &sc->sc_irq_rman;
289 break;
290
291 case SYS_RES_IOPORT:
292 rmanp = &sc->sc_io_rman;
293 break;
294
295 case SYS_RES_MEMORY:
296 rmanp = &sc->sc_mem_rman;
297 break;
298
299 default:
300 return (rv);
301 }
302
303 rv = rman_reserve_resource(rmanp, start, end, count, flags & ~RF_ACTIVE,
304 child);
305 if (rv == NULL)
306 return (NULL);
307 rman_set_rid(rv, *rid);
308 if (flags & RF_ACTIVE) {
309 if (bus_activate_resource(child, type, *rid, rv)) {
310 rman_release_resource(rv);
311 return (NULL);
312 }
313 }
314
315 return (rv);
316 }
317
318 static int
319 ixppcib_activate_resource(device_t bus, device_t child, int type, int rid,
320 struct resource *r)
321 {
322
323 struct ixppcib_softc *sc = device_get_softc(bus);
324
325 switch (type) {
326 case SYS_RES_IOPORT:
327 rman_set_bustag(r, &sc->sc_pci_iot);
328 rman_set_bushandle(r, rman_get_start(r));
329 break;
330 case SYS_RES_MEMORY:
331 rman_set_bustag(r, &sc->sc_pci_memt);
332 rman_set_bushandle(r, rman_get_bushandle(sc->sc_mem) +
333 (rman_get_start(r) - IXP425_PCI_MEM_HWBASE));
334 break;
335 }
336
337 return (rman_activate_resource(r));
338 }
339
340 static int
341 ixppcib_deactivate_resource(device_t bus, device_t child, int type, int rid,
342 struct resource *r)
343 {
344
345 device_printf(bus, "%s called deactivate_resource (unexpected)\n",
346 device_get_nameunit(child));
347 return (ENXIO);
348 }
349
350 static int
351 ixppcib_release_resource(device_t bus, device_t child, int type, int rid,
352 struct resource *r)
353 {
354
355 device_printf(bus, "%s called release_resource (unexpected)\n",
356 device_get_nameunit(child));
357 return (ENXIO);
358 }
359
360 static void
361 ixppcib_conf_setup(struct ixppcib_softc *sc, int bus, int slot, int func,
362 int reg)
363 {
364 if (bus == 0) {
365 /* configuration type 0 */
366 PCI_CSR_WRITE_4(sc, PCI_NP_AD,
367 (1U << (32 - (slot & 0x1f))) |
368 ((func & 0x7) << 8) | (reg & ~3));
369 } else {
370 /* configuration type 1 */
371 PCI_CSR_WRITE_4(sc, PCI_NP_AD,
372 (bus << 16) | (slot << 11) |
373 (func << 8) | (reg & ~3) | 1);
374 }
375
376 }
377
378 static int
379 ixppcib_maxslots(device_t dev)
380 {
381
382 return (PCI_SLOTMAX);
383 }
384
385 static u_int32_t
386 ixppcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
387 int bytes)
388 {
389 struct ixppcib_softc *sc = device_get_softc(dev);
390 u_int32_t data, ret;
391
392 ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
393
394 PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_READ);
395 ret = PCI_CSR_READ_4(sc, PCI_NP_RDATA);
396 ret >>= (reg & 3) * 8;
397 ret &= 0xffffffff >> ((4 - bytes) * 8);
398 #if 0
399 device_printf(dev, "%s: %u:%u:%u %#x(%d) = %#x\n",
400 __func__, bus, slot, func, reg, bytes, ret);
401 #endif
402 /* check & clear PCI abort */
403 data = PCI_CSR_READ_4(sc, PCI_ISR);
404 if (data & ISR_PFE) {
405 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
406 return (-1);
407 }
408 return (ret);
409 }
410
411 static const int byteenables[] = { 0, 0x10, 0x30, 0x70, 0xf0 };
412
413 static void
414 ixppcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
415 u_int32_t val, int bytes)
416 {
417 struct ixppcib_softc *sc = device_get_softc(dev);
418 u_int32_t data;
419
420 #if 0
421 device_printf(dev, "%s: %u:%u:%u %#x(%d) = %#x\n",
422 __func__, bus, slot, func, reg, bytes, val);
423 #endif
424 ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
425
426 /* Byte enables are active low, so not them first */
427 PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_WRITE |
428 (~(byteenables[bytes] << (reg & 3)) & 0xf0));
429 PCI_CSR_WRITE_4(sc, PCI_NP_WDATA, val << ((reg & 3) * 8));
430
431 /* check & clear PCI abort */
432 data = PCI_CSR_READ_4(sc, PCI_ISR);
433 if (data & ISR_PFE)
434 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
435 }
436
437 static int
438 ixppcib_route_interrupt(device_t bridge, device_t device, int pin)
439 {
440
441 return (ixp425_md_route_interrupt(bridge, device, pin));
442 }
443
444 static device_method_t ixppcib_methods[] = {
445 /* Device interface */
446 DEVMETHOD(device_probe, ixppcib_probe),
447 DEVMETHOD(device_attach, ixppcib_attach),
448
449 /* Bus interface */
450 DEVMETHOD(bus_read_ivar, ixppcib_read_ivar),
451 DEVMETHOD(bus_write_ivar, ixppcib_write_ivar),
452 DEVMETHOD(bus_setup_intr, ixppcib_setup_intr),
453 DEVMETHOD(bus_teardown_intr, ixppcib_teardown_intr),
454 DEVMETHOD(bus_alloc_resource, ixppcib_alloc_resource),
455 DEVMETHOD(bus_activate_resource, ixppcib_activate_resource),
456 DEVMETHOD(bus_deactivate_resource, ixppcib_deactivate_resource),
457 DEVMETHOD(bus_release_resource, ixppcib_release_resource),
458 /* DEVMETHOD(bus_get_dma_tag, ixppcib_get_dma_tag), */
459
460 /* pcib interface */
461 DEVMETHOD(pcib_maxslots, ixppcib_maxslots),
462 DEVMETHOD(pcib_read_config, ixppcib_read_config),
463 DEVMETHOD(pcib_write_config, ixppcib_write_config),
464 DEVMETHOD(pcib_route_interrupt, ixppcib_route_interrupt),
465
466 DEVMETHOD_END
467 };
468
469 static driver_t ixppcib_driver = {
470 "pcib",
471 ixppcib_methods,
472 sizeof(struct ixppcib_softc),
473 };
474 static devclass_t ixppcib_devclass;
475
476 DRIVER_MODULE(ixppcib, ixp, ixppcib_driver, ixppcib_devclass, 0, 0);
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