2 * Copyright (c) 2003-2012 Broadcom Corporation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/types.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
37 #include <sys/malloc.h>
39 #include <sys/endian.h>
41 #include <sys/pciio.h>
43 #include <machine/bus.h>
44 #include <machine/md_var.h>
45 #include <machine/intr_machdep.h>
46 #include <machine/cpuregs.h>
49 #include <vm/vm_param.h>
52 #include <dev/pci/pcivar.h>
53 #include <dev/pci/pcireg.h>
54 #include <dev/pci/pci_private.h>
56 #include <dev/uart/uart.h>
57 #include <dev/uart/uart_bus.h>
58 #include <dev/uart/uart_cpu.h>
60 #include <dev/ofw/openfirm.h>
61 #include <dev/ofw/ofw_bus.h>
62 #include <dev/ofw/ofw_bus_subr.h>
64 #include <mips/nlm/hal/haldefs.h>
65 #include <mips/nlm/interrupt.h>
66 #include <mips/nlm/hal/iomap.h>
67 #include <mips/nlm/hal/mips-extns.h>
68 #include <mips/nlm/hal/pic.h>
69 #include <mips/nlm/hal/bridge.h>
70 #include <mips/nlm/hal/gbu.h>
71 #include <mips/nlm/hal/pcibus.h>
72 #include <mips/nlm/hal/uart.h>
73 #include <mips/nlm/xlp.h>
76 #include <dev/pci/pcib_private.h>
80 xlp_pci_attach(device_t dev)
82 struct pci_devinfo *dinfo;
84 int maxslots, s, f, pcifunchigh, irq;
85 int busno, node, devoffset;
90 * The on-chip devices are on a bus that is almost, but not
91 * quite, completely like PCI. Add those things by hand.
93 pcib = device_get_parent(dev);
94 busno = pcib_get_bus(dev);
95 maxslots = PCIB_MAXSLOTS(pcib);
96 for (s = 0; s <= maxslots; s++) {
99 hdrtype = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_HDRTYPE, 1);
100 if ((hdrtype & PCIM_HDRTYPE) > PCI_MAXHDRTYPE)
102 if (hdrtype & PCIM_MFDEV)
103 pcifunchigh = PCI_FUNCMAX;
105 for (f = 0; f <= pcifunchigh; f++) {
106 devoffset = XLP_HDR_OFFSET(node, 0, s % 8, f);
107 if (!nlm_dev_exists(devoffset))
110 /* Find if there is a desc for the SoC device */
111 devid = PCIB_READ_CONFIG(pcib, busno, s, f, PCIR_DEVICE, 2);
113 /* Skip devices that don't have a proper PCI header */
115 case PCI_DEVICE_ID_NLM_ICI:
116 case PCI_DEVICE_ID_NLM_PIC:
117 case PCI_DEVICE_ID_NLM_FMN:
118 case PCI_DEVICE_ID_NLM_UART:
119 case PCI_DEVICE_ID_NLM_I2C:
120 case PCI_DEVICE_ID_NLM_NOR:
121 case PCI_DEVICE_ID_NLM_MMC:
123 case PCI_DEVICE_ID_NLM_EHCI:
124 irq = PIC_USB_IRQ(f);
125 PCIB_WRITE_CONFIG(pcib, busno, s, f,
126 XLP_PCI_DEVSCRATCH_REG0 << 2,
129 dinfo = pci_read_device(pcib, dev, pcib_get_domain(dev),
131 pci_add_child(dev, dinfo);
134 return (bus_generic_attach(dev));
138 xlp_pci_probe(device_t dev)
142 pcib = device_get_parent(dev);
144 * Only the top level bus has SoC devices, leave the rest to
147 if (strcmp(device_get_nameunit(pcib), "pcib0") != 0)
149 device_set_desc(dev, "XLP SoCbus");
150 return (BUS_PROBE_DEFAULT);
153 static devclass_t pci_devclass;
154 static device_method_t xlp_pci_methods[] = {
155 /* Device interface */
156 DEVMETHOD(device_probe, xlp_pci_probe),
157 DEVMETHOD(device_attach, xlp_pci_attach),
158 DEVMETHOD(bus_rescan, bus_null_rescan),
162 DEFINE_CLASS_1(pci, xlp_pci_driver, xlp_pci_methods, sizeof(struct pci_softc),
164 DRIVER_MODULE(xlp_pci, pcib, xlp_pci_driver, pci_devclass, 0, 0);
167 xlp_pcib_probe(device_t dev)
170 if (ofw_bus_is_compatible(dev, "netlogic,xlp-pci")) {
171 device_set_desc(dev, "XLP PCI bus");
172 return (BUS_PROBE_DEFAULT);
178 xlp_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
182 case PCIB_IVAR_DOMAIN:
193 xlp_pcib_write_ivar(device_t dev, device_t child, int which, uintptr_t result)
196 case PCIB_IVAR_DOMAIN:
205 xlp_pcib_maxslots(device_t dev)
208 return (PCI_SLOTMAX);
212 xlp_pcib_read_config(device_t dev, u_int b, u_int s, u_int f,
213 u_int reg, int width)
217 int regindex = reg/sizeof(uint32_t);
219 cfgaddr = nlm_pcicfg_base(XLP_HDR_OFFSET(0, b, s, f));
220 if ((width == 2) && (reg & 1))
222 else if ((width == 4) && (reg & 3))
226 * The intline and int pin of SoC devices are DOA, except
227 * for bridges (slot %8 == 1).
228 * use the values we stashed in a writable PCI scratch reg.
230 if (b == 0 && regindex == 0xf && s % 8 > 1)
231 regindex = XLP_PCI_DEVSCRATCH_REG0;
233 data = nlm_read_pci_reg(cfgaddr, regindex);
235 return ((data >> ((reg & 3) << 3)) & 0xff);
237 return ((data >> ((reg & 3) << 3)) & 0xffff);
243 xlp_pcib_write_config(device_t dev, u_int b, u_int s, u_int f,
244 u_int reg, u_int32_t val, int width)
248 int regindex = reg / sizeof(uint32_t);
250 cfgaddr = nlm_pcicfg_base(XLP_HDR_OFFSET(0, b, s, f));
251 if ((width == 2) && (reg & 1))
253 else if ((width == 4) && (reg & 3))
257 data = nlm_read_pci_reg(cfgaddr, regindex);
258 data = (data & ~(0xff << ((reg & 3) << 3))) |
259 (val << ((reg & 3) << 3));
260 } else if (width == 2) {
261 data = nlm_read_pci_reg(cfgaddr, regindex);
262 data = (data & ~(0xffff << ((reg & 3) << 3))) |
263 (val << ((reg & 3) << 3));
269 * use shadow reg for intpin/intline which are dead
271 if (b == 0 && regindex == 0xf && s % 8 > 1)
272 regindex = XLP_PCI_DEVSCRATCH_REG0;
273 nlm_write_pci_reg(cfgaddr, regindex, data);
277 * Enable byte swap in hardware when compiled big-endian.
278 * Programs a link's PCIe SWAP regions from the link's IO and MEM address
282 xlp_pcib_hardware_swap_enable(int node, int link)
284 #if BYTE_ORDER == BIG_ENDIAN
285 uint64_t bbase, linkpcibase;
289 pcieoffset = XLP_IO_PCIE_OFFSET(node, link);
290 if (!nlm_dev_exists(pcieoffset))
293 bbase = nlm_get_bridge_regbase(node);
294 linkpcibase = nlm_pcicfg_base(pcieoffset);
295 bar = nlm_read_bridge_reg(bbase, BRIDGE_PCIEMEM_BASE0 + link);
296 nlm_write_pci_reg(linkpcibase, PCIE_BYTE_SWAP_MEM_BASE, bar);
298 bar = nlm_read_bridge_reg(bbase, BRIDGE_PCIEMEM_LIMIT0 + link);
299 nlm_write_pci_reg(linkpcibase, PCIE_BYTE_SWAP_MEM_LIM, bar | 0xFFF);
301 bar = nlm_read_bridge_reg(bbase, BRIDGE_PCIEIO_BASE0 + link);
302 nlm_write_pci_reg(linkpcibase, PCIE_BYTE_SWAP_IO_BASE, bar);
304 bar = nlm_read_bridge_reg(bbase, BRIDGE_PCIEIO_LIMIT0 + link);
305 nlm_write_pci_reg(linkpcibase, PCIE_BYTE_SWAP_IO_LIM, bar | 0xFFF);
310 xlp_pcib_attach(device_t dev)
314 /* enable hardware swap on all nodes/links */
315 for (node = 0; node < XLP_MAX_NODES; node++)
316 for (link = 0; link < 4; link++)
317 xlp_pcib_hardware_swap_enable(node, link);
319 device_add_child(dev, "pci", -1);
320 bus_generic_attach(dev);
325 * XLS PCIe can have upto 4 links, and each link has its on IRQ
326 * Find the link on which the device is on
329 xlp_pcie_link(device_t pcib, device_t dev)
331 device_t parent, tmp;
333 /* find the lane on which the slot is connected to */
336 parent = device_get_parent(tmp);
337 if (parent == NULL || parent == pcib) {
338 device_printf(dev, "Cannot find parent bus\n");
341 if (strcmp(device_get_nameunit(parent), "pci0") == 0)
345 return (pci_get_function(tmp));
349 xlp_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
354 * Each link has 32 MSIs that can be allocated, but for now
355 * we only support one device per link.
356 * msi_alloc() equivalent is needed when we start supporting
357 * bridges on the PCIe link.
359 link = xlp_pcie_link(pcib, dev);
364 * encode the irq so that we know it is a MSI interrupt when we
367 for (i = 0; i < count; i++)
368 irqs[i] = 64 + link * 32 + i;
374 xlp_release_msi(device_t pcib, device_t dev, int count, int *irqs)
380 xlp_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr,
386 device_printf(dev, "%s: map_msi for irq %d - ignored",
387 device_get_nameunit(pcib), irq);
390 link = (irq - 64) / 32;
391 *addr = MIPS_MSI_ADDR(0);
392 *data = MIPS_MSI_DATA(PIC_PCIE_IRQ(link));
397 bridge_pcie_ack(int irq, void *arg)
403 reg = PCIE_MSI_STATUS;
407 base = nlm_pcicfg_base(XLP_IO_PCIE0_OFFSET(node));
410 base = nlm_pcicfg_base(XLP_IO_PCIE1_OFFSET(node));
413 base = nlm_pcicfg_base(XLP_IO_PCIE2_OFFSET(node));
416 base = nlm_pcicfg_base(XLP_IO_PCIE3_OFFSET(node));
422 nlm_write_pci_reg(base, reg, 0xFFFFFFFF);
427 mips_platform_pcib_setup_intr(device_t dev, device_t child,
428 struct resource *irq, int flags, driver_filter_t *filt,
429 driver_intr_t *intr, void *arg, void **cookiep)
434 error = rman_activate_resource(irq);
437 if (rman_get_start(irq) != rman_get_end(irq)) {
438 device_printf(dev, "Interrupt allocation %ju != %ju\n",
439 rman_get_start(irq), rman_get_end(irq));
442 xlpirq = rman_get_start(irq);
446 if (strcmp(device_get_name(dev), "pcib") != 0)
450 * temporary hack for MSI, we support just one device per
451 * link, and assign the link interrupt to the device interrupt
458 if (xlpirq % 32 != 0)
463 base = nlm_pcicfg_base(XLP_IO_PCIE_OFFSET(node,link));
465 /* MSI Interrupt Vector enable at bridge's configuration */
466 nlm_write_pci_reg(base, PCIE_MSI_EN, PCIE_MSI_VECTOR_INT_EN);
468 val = nlm_read_pci_reg(base, PCIE_INT_EN0);
469 /* MSI Interrupt enable at bridge's configuration */
470 nlm_write_pci_reg(base, PCIE_INT_EN0,
471 (val | PCIE_MSI_INT_EN));
473 /* legacy interrupt disable at bridge */
474 val = nlm_read_pci_reg(base, PCIE_BRIDGE_CMD);
475 nlm_write_pci_reg(base, PCIE_BRIDGE_CMD,
476 (val | PCIM_CMD_INTxDIS));
478 /* MSI address update at bridge */
479 nlm_write_pci_reg(base, PCIE_BRIDGE_MSI_ADDRL,
481 nlm_write_pci_reg(base, PCIE_BRIDGE_MSI_ADDRH, 0);
483 val = nlm_read_pci_reg(base, PCIE_BRIDGE_MSI_CAP);
484 /* MSI capability enable at bridge */
485 nlm_write_pci_reg(base, PCIE_BRIDGE_MSI_CAP,
486 (val | (PCIM_MSICTRL_MSI_ENABLE << 16) |
487 (PCIM_MSICTRL_MMC_32 << 16)));
488 xlpirq = PIC_PCIE_IRQ(link);
491 /* if it is for real PCIe, we need to ack at bridge too */
492 if (xlpirq >= PIC_PCIE_IRQ(0) && xlpirq <= PIC_PCIE_IRQ(3))
493 xlp_set_bus_ack(xlpirq, bridge_pcie_ack, NULL);
494 cpu_establish_hardintr(device_get_name(child), filt, intr, arg,
495 xlpirq, flags, cookiep);
501 mips_platform_pcib_teardown_intr(device_t dev, device_t child,
502 struct resource *irq, void *cookie)
504 if (strcmp(device_get_name(child), "pci") == 0) {
505 /* if needed reprogram the pic to clear pcix related entry */
506 device_printf(dev, "teardown intr\n");
508 return (bus_generic_teardown_intr(dev, child, irq, cookie));
512 mips_pcib_route_interrupt(device_t bus, device_t dev, int pin)
517 * Validate requested pin number.
519 if ((pin < 1) || (pin > 4))
522 if (pci_get_bus(dev) == 0 &&
523 pci_get_vendor(dev) == PCI_VENDOR_NETLOGIC) {
524 f = pci_get_function(dev);
525 d = pci_get_slot(dev) % 8;
528 * For PCIe links, return link IRT, for other SoC devices
529 * get the IRT from its PCIe header
532 return (PIC_PCIE_IRQ(f));
534 return (255); /* use intline, don't reroute */
536 /* Regular PCI devices */
537 return (PIC_PCIE_IRQ(xlp_pcie_link(bus, dev)));
541 static device_method_t xlp_pcib_methods[] = {
542 /* Device interface */
543 DEVMETHOD(device_probe, xlp_pcib_probe),
544 DEVMETHOD(device_attach, xlp_pcib_attach),
547 DEVMETHOD(bus_read_ivar, xlp_pcib_read_ivar),
548 DEVMETHOD(bus_write_ivar, xlp_pcib_write_ivar),
549 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
550 DEVMETHOD(bus_release_resource, bus_generic_release_resource),
551 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
552 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
553 DEVMETHOD(bus_setup_intr, mips_platform_pcib_setup_intr),
554 DEVMETHOD(bus_teardown_intr, mips_platform_pcib_teardown_intr),
557 DEVMETHOD(pcib_maxslots, xlp_pcib_maxslots),
558 DEVMETHOD(pcib_read_config, xlp_pcib_read_config),
559 DEVMETHOD(pcib_write_config, xlp_pcib_write_config),
560 DEVMETHOD(pcib_route_interrupt, mips_pcib_route_interrupt),
561 DEVMETHOD(pcib_request_feature, pcib_request_feature_allow),
563 DEVMETHOD(pcib_alloc_msi, xlp_alloc_msi),
564 DEVMETHOD(pcib_release_msi, xlp_release_msi),
565 DEVMETHOD(pcib_map_msi, xlp_map_msi),
570 static driver_t xlp_pcib_driver = {
576 static devclass_t pcib_devclass;
577 DRIVER_MODULE(xlp_pcib, simplebus, xlp_pcib_driver, pcib_devclass, 0, 0);