1 /* $NetBSD: ixp425_pci.c,v 1.5 2006/04/10 03:36:03 simonb Exp $ */
5 * Ichiro FUKUHARA <ichiro@ichiro.org>.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/malloc.h>
42 #define _ARM32_BUS_DMA_PRIVATE
44 #include <sys/kernel.h>
45 #include <sys/module.h>
48 #include <machine/bus.h>
49 #include <machine/cpu.h>
50 #include <machine/pcb.h>
53 #include <vm/vm_extern.h>
54 #include <machine/pmap.h>
56 #include <arm/xscale/ixp425/ixp425reg.h>
57 #include <arm/xscale/ixp425/ixp425var.h>
59 #include <dev/pci/pcib_private.h>
62 #include <dev/pci/pcireg.h>
63 extern struct ixp425_softc *ixp425_softc;
65 #define PCI_CSR_WRITE_4(sc, reg, data) \
66 bus_write_4(sc->sc_csr, reg, data)
68 #define PCI_CSR_READ_4(sc, reg) \
69 bus_read_4(sc->sc_csr, reg)
71 #define PCI_CONF_LOCK(s) (s) = disable_interrupts(I32_bit)
72 #define PCI_CONF_UNLOCK(s) restore_interrupts((s))
74 static device_probe_t ixppcib_probe;
75 static device_attach_t ixppcib_attach;
76 static bus_read_ivar_t ixppcib_read_ivar;
77 static bus_write_ivar_t ixppcib_write_ivar;
78 static bus_setup_intr_t ixppcib_setup_intr;
79 static bus_teardown_intr_t ixppcib_teardown_intr;
80 static bus_alloc_resource_t ixppcib_alloc_resource;
81 static bus_activate_resource_t ixppcib_activate_resource;
82 static bus_deactivate_resource_t ixppcib_deactivate_resource;
83 static bus_release_resource_t ixppcib_release_resource;
84 static pcib_maxslots_t ixppcib_maxslots;
85 static pcib_read_config_t ixppcib_read_config;
86 static pcib_write_config_t ixppcib_write_config;
87 static pcib_route_interrupt_t ixppcib_route_interrupt;
90 ixppcib_probe(device_t dev)
92 device_set_desc(dev, "IXP4XX PCI Bus");
97 ixp425_pci_conf_reg_write(struct ixppcib_softc *sc, uint32_t reg,
100 PCI_CSR_WRITE_4(sc, PCI_CRP_AD_CBE, ((reg & ~3) | COMMAND_CRP_WRITE));
101 PCI_CSR_WRITE_4(sc, PCI_CRP_AD_WDATA, data);
105 ixppcib_attach(device_t dev)
108 struct ixppcib_softc *sc;
110 sc = device_get_softc(dev);
113 sc->sc_csr = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
114 IXP425_PCI_HWBASE, IXP425_PCI_HWBASE + IXP425_PCI_SIZE,
115 IXP425_PCI_SIZE, RF_ACTIVE);
116 if (sc->sc_csr == NULL)
117 panic("cannot allocate PCI CSR registers");
119 ixp425_md_attach(dev);
120 /* always setup the base, incase another OS messes w/ it */
121 PCI_CSR_WRITE_4(sc, PCI_PCIMEMBASE, 0x48494a4b);
124 sc->sc_mem = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
125 IXP425_PCI_MEM_HWBASE, IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE,
126 IXP425_PCI_MEM_SIZE, RF_ACTIVE);
127 if (sc->sc_mem == NULL)
128 panic("cannot allocate PCI MEM space");
130 /* NB: PCI dma window is 64M so anything above must be bounced */
131 if (bus_dma_tag_create(NULL, 1, 0, IXP425_AHB_OFFSET + 64 * 1024 * 1024,
132 BUS_SPACE_MAXADDR, NULL, NULL, 0xffffffff, 0xff, 0xffffffff, 0,
133 NULL, NULL, &sc->sc_dmat))
134 panic("couldn't create the PCI dma tag !");
136 * The PCI bus can only address 64MB. However, due to the way our
137 * implementation of busdma works, busdma can't tell if a device
138 * is a PCI device or not. So defaults to the PCI dma tag, which
139 * restrict the DMA'able memory to the first 64MB, and explicitely
140 * create less restrictive tags for non-PCI devices.
142 arm_root_dma_tag = sc->sc_dmat;
144 * Initialize the bus space tags.
146 ixp425_io_bs_init(&sc->sc_pci_iot, sc);
147 ixp425_mem_bs_init(&sc->sc_pci_memt, sc);
151 /* Initialize memory and i/o rmans. */
152 sc->sc_io_rman.rm_type = RMAN_ARRAY;
153 sc->sc_io_rman.rm_descr = "IXP4XX PCI I/O Ports";
154 if (rman_init(&sc->sc_io_rman) != 0 ||
155 rman_manage_region(&sc->sc_io_rman, 0,
156 IXP425_PCI_IO_SIZE) != 0) {
157 panic("ixppcib_probe: failed to set up I/O rman");
160 sc->sc_mem_rman.rm_type = RMAN_ARRAY;
161 sc->sc_mem_rman.rm_descr = "IXP4XX PCI Memory";
162 if (rman_init(&sc->sc_mem_rman) != 0 ||
163 rman_manage_region(&sc->sc_mem_rman, IXP425_PCI_MEM_HWBASE,
164 IXP425_PCI_MEM_HWBASE + IXP425_PCI_MEM_SIZE) != 0) {
165 panic("ixppcib_probe: failed to set up memory rman");
169 * PCI->AHB address translation
170 * begin at the physical memory start + OFFSET
172 PCI_CSR_WRITE_4(sc, PCI_AHBMEMBASE,
173 (IXP425_AHB_OFFSET & 0xFF000000) +
174 ((IXP425_AHB_OFFSET & 0xFF000000) >> 8) +
175 ((IXP425_AHB_OFFSET & 0xFF000000) >> 16) +
176 ((IXP425_AHB_OFFSET & 0xFF000000) >> 24) +
179 #define IXPPCIB_WRITE_CONF(sc, reg, val) \
180 ixp425_pci_conf_reg_write(sc, reg, val)
181 /* Write Mapping registers PCI Configuration Registers */
182 /* Base Address 0 - 3 */
183 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR0, IXP425_AHB_OFFSET + 0x00000000);
184 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR1, IXP425_AHB_OFFSET + 0x01000000);
185 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR2, IXP425_AHB_OFFSET + 0x02000000);
186 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR3, IXP425_AHB_OFFSET + 0x03000000);
189 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR4, 0xffffffff);
192 IXPPCIB_WRITE_CONF(sc, PCI_MAPREG_BAR5, 0x00000000);
194 /* Assert some PCI errors */
195 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_AHBE | ISR_PPE | ISR_PFE | ISR_PSE);
199 * Set up byte lane swapping between little-endian PCI
200 * and the big-endian AHB bus
202 PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE | CSR_PDS);
204 PCI_CSR_WRITE_4(sc, PCI_CSR, CSR_IC | CSR_ABE);
208 * Enable bus mastering and I/O,memory access
210 IXPPCIB_WRITE_CONF(sc, PCIR_COMMAND,
211 PCIM_CMD_MEMEN | PCIM_CMD_BUSMASTEREN);
214 * Wait some more to ensure PCI devices have stabilised.
218 device_add_child(dev, "pci", -1);
219 return (bus_generic_attach(dev));
223 ixppcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
225 struct ixppcib_softc *sc;
227 sc = device_get_softc(dev);
229 case PCIB_IVAR_DOMAIN:
233 *result = sc->sc_bus;
241 ixppcib_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
243 struct ixppcib_softc *sc;
245 sc = device_get_softc(dev);
247 case PCIB_IVAR_DOMAIN:
258 ixppcib_setup_intr(device_t dev, device_t child, struct resource *ires,
259 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg,
263 return (BUS_SETUP_INTR(device_get_parent(dev), child, ires, flags,
264 filt, intr, arg, cookiep));
268 ixppcib_teardown_intr(device_t dev, device_t child, struct resource *vec,
272 return (BUS_TEARDOWN_INTR(device_get_parent(dev), child, vec, cookie));
275 static struct resource *
276 ixppcib_alloc_resource(device_t bus, device_t child, int type, int *rid,
277 u_long start, u_long end, u_long count, u_int flags)
279 struct ixppcib_softc *sc = device_get_softc(bus);
286 rmanp = &sc->sc_irq_rman;
290 rmanp = &sc->sc_io_rman;
294 rmanp = &sc->sc_mem_rman;
301 rv = rman_reserve_resource(rmanp, start, end, count, flags & ~RF_ACTIVE,
305 rman_set_rid(rv, *rid);
306 if (flags & RF_ACTIVE) {
307 if (bus_activate_resource(child, type, *rid, rv)) {
308 rman_release_resource(rv);
317 ixppcib_activate_resource(device_t bus, device_t child, int type, int rid,
321 struct ixppcib_softc *sc = device_get_softc(bus);
325 rman_set_bustag(r, &sc->sc_pci_iot);
326 rman_set_bushandle(r, rman_get_start(r));
329 rman_set_bustag(r, &sc->sc_pci_memt);
330 rman_set_bushandle(r, rman_get_bushandle(sc->sc_mem) +
331 (rman_get_start(r) - IXP425_PCI_MEM_HWBASE));
335 return (rman_activate_resource(r));
339 ixppcib_deactivate_resource(device_t bus, device_t child, int type, int rid,
343 device_printf(bus, "%s called deactivate_resource (unexpected)\n",
344 device_get_nameunit(child));
349 ixppcib_release_resource(device_t bus, device_t child, int type, int rid,
353 device_printf(bus, "%s called release_resource (unexpected)\n",
354 device_get_nameunit(child));
359 ixppcib_conf_setup(struct ixppcib_softc *sc, int bus, int slot, int func,
363 /* configuration type 0 */
364 PCI_CSR_WRITE_4(sc, PCI_NP_AD,
365 (1U << (32 - (slot & 0x1f))) |
366 ((func & 0x7) << 8) | (reg & ~3));
368 /* configuration type 1 */
369 PCI_CSR_WRITE_4(sc, PCI_NP_AD,
370 (bus << 16) | (slot << 11) |
371 (func << 8) | (reg & ~3) | 1);
377 ixppcib_maxslots(device_t dev)
380 return (PCI_SLOTMAX);
384 ixppcib_read_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
387 struct ixppcib_softc *sc = device_get_softc(dev);
390 ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
392 PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_READ);
393 ret = PCI_CSR_READ_4(sc, PCI_NP_RDATA);
394 ret >>= (reg & 3) * 8;
395 ret &= 0xffffffff >> ((4 - bytes) * 8);
397 device_printf(dev, "%s: %u:%u:%u %#x(%d) = %#x\n",
398 __func__, bus, slot, func, reg, bytes, ret);
400 /* check & clear PCI abort */
401 data = PCI_CSR_READ_4(sc, PCI_ISR);
402 if (data & ISR_PFE) {
403 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
409 static const int byteenables[] = { 0, 0x10, 0x30, 0x70, 0xf0 };
412 ixppcib_write_config(device_t dev, u_int bus, u_int slot, u_int func, u_int reg,
413 u_int32_t val, int bytes)
415 struct ixppcib_softc *sc = device_get_softc(dev);
419 device_printf(dev, "%s: %u:%u:%u %#x(%d) = %#x\n",
420 __func__, bus, slot, func, reg, bytes, val);
422 ixppcib_conf_setup(sc, bus, slot, func, reg & ~3);
424 /* Byte enables are active low, so not them first */
425 PCI_CSR_WRITE_4(sc, PCI_NP_CBE, COMMAND_NP_CONF_WRITE |
426 (~(byteenables[bytes] << (reg & 3)) & 0xf0));
427 PCI_CSR_WRITE_4(sc, PCI_NP_WDATA, val << ((reg & 3) * 8));
429 /* check & clear PCI abort */
430 data = PCI_CSR_READ_4(sc, PCI_ISR);
432 PCI_CSR_WRITE_4(sc, PCI_ISR, ISR_PFE);
436 ixppcib_route_interrupt(device_t bridge, device_t device, int pin)
439 return (ixp425_md_route_interrupt(bridge, device, pin));
442 static device_method_t ixppcib_methods[] = {
443 /* Device interface */
444 DEVMETHOD(device_probe, ixppcib_probe),
445 DEVMETHOD(device_attach, ixppcib_attach),
448 DEVMETHOD(bus_print_child, bus_generic_print_child),
449 DEVMETHOD(bus_read_ivar, ixppcib_read_ivar),
450 DEVMETHOD(bus_write_ivar, ixppcib_write_ivar),
451 DEVMETHOD(bus_setup_intr, ixppcib_setup_intr),
452 DEVMETHOD(bus_teardown_intr, ixppcib_teardown_intr),
453 DEVMETHOD(bus_alloc_resource, ixppcib_alloc_resource),
454 DEVMETHOD(bus_activate_resource, ixppcib_activate_resource),
455 DEVMETHOD(bus_deactivate_resource, ixppcib_deactivate_resource),
456 DEVMETHOD(bus_release_resource, ixppcib_release_resource),
457 /* DEVMETHOD(bus_get_dma_tag, ixppcib_get_dma_tag), */
460 DEVMETHOD(pcib_maxslots, ixppcib_maxslots),
461 DEVMETHOD(pcib_read_config, ixppcib_read_config),
462 DEVMETHOD(pcib_write_config, ixppcib_write_config),
463 DEVMETHOD(pcib_route_interrupt, ixppcib_route_interrupt),
468 static driver_t ixppcib_driver = {
471 sizeof(struct ixppcib_softc),
473 static devclass_t ixppcib_devclass;
475 DRIVER_MODULE(ixppcib, ixp, ixppcib_driver, ixppcib_devclass, 0, 0);