2 * SPDX-License-Identifier: BSD-2-Clause
4 * Copyright 2020 Michal Meloun <mmel@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * 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 the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 /* Layerscape DesignWare PCIe driver */
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
35 #include <sys/param.h>
36 #include <sys/systm.h>
38 #include <sys/devmap.h>
40 #include <sys/kernel.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/mutex.h>
45 #include <sys/sysctl.h>
47 #include <machine/bus.h>
48 #include <machine/intr.h>
49 #include <machine/resource.h>
51 #include <dev/ofw/ofw_bus.h>
52 #include <dev/ofw/ofw_bus_subr.h>
53 #include <dev/ofw/ofw_pci.h>
54 #include <dev/ofw/ofwpci.h>
55 #include <dev/pci/pcivar.h>
56 #include <dev/pci/pcireg.h>
57 #include <dev/pci/pcib_private.h>
58 #include <dev/pci/pci_dw.h>
61 #include "pci_dw_if.h"
63 #define PCIE_ABSERR 0x8D0
65 struct qoriq_dw_pci_cfg {
66 uint32_t pex_pf0_dgb; /* offset of PEX_PF0_DBG register */
67 uint32_t ltssm_bit; /* LSB bit of of LTSSM state field */
70 struct qorif_dw_pci_softc {
71 struct pci_dw_softc dw_sc;
74 struct resource *irq_res;
76 struct qoriq_dw_pci_cfg *soc_cfg;
80 static struct qoriq_dw_pci_cfg ls1043_cfg = {
81 .pex_pf0_dgb = 0x10000 + 0x7FC,
85 static struct qoriq_dw_pci_cfg ls1012_cfg = {
86 .pex_pf0_dgb = 0x80000 + 0x407FC,
90 static struct qoriq_dw_pci_cfg ls2080_cfg = {
91 .pex_pf0_dgb = 0x80000 + 0x7FC,
95 static struct qoriq_dw_pci_cfg ls2028_cfg = {
96 .pex_pf0_dgb = 0x80000 + 0x407FC,
101 /* Compatible devices. */
102 static struct ofw_compat_data compat_data[] = {
103 {"fsl,ls1012a-pcie", (uintptr_t)&ls1012_cfg},
104 {"fsl,ls1028a-pcie", (uintptr_t)&ls2028_cfg},
105 {"fsl,ls1043a-pcie", (uintptr_t)&ls1043_cfg},
106 {"fsl,ls1046a-pcie", (uintptr_t)&ls1012_cfg},
107 {"fsl,ls2080a-pcie", (uintptr_t)&ls2080_cfg},
108 {"fsl,ls2085a-pcie", (uintptr_t)&ls2080_cfg},
109 {"fsl,ls2088a-pcie", (uintptr_t)&ls2028_cfg},
110 {"fsl,ls1088a-pcie", (uintptr_t)&ls2028_cfg},
115 qorif_dw_pci_dbi_protect(struct qorif_dw_pci_softc *sc, bool protect)
119 reg = pci_dw_dbi_rd4(sc->dev, DW_MISC_CONTROL_1);
121 reg &= ~DBI_RO_WR_EN;
124 pci_dw_dbi_wr4(sc->dev, DW_MISC_CONTROL_1, reg);
127 static int qorif_dw_pci_intr(void *arg)
130 struct qorif_dw_pci_softc *sc = arg;
131 uint32_t cause1, cause2;
133 /* Ack all interrups */
134 cause1 = pci_dw_dbi_rd4(sc->dev, MV_INT_CAUSE1);
135 cause2 = pci_dw_dbi_rd4(sc->dev, MV_INT_CAUSE2);
137 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE1, cause1);
138 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE2, cause2);
140 return (FILTER_HANDLED);
144 qorif_dw_pci_get_link(device_t dev, bool *status)
146 struct qorif_dw_pci_softc *sc;
149 sc = device_get_softc(dev);
150 reg = pci_dw_dbi_rd4(sc->dev, sc->soc_cfg->pex_pf0_dgb);
151 reg >>= sc->soc_cfg->ltssm_bit;
153 *status = (reg == 0x11) ? true : false;
158 qorif_dw_pci_init(struct qorif_dw_pci_softc *sc)
161 // ls_pcie_disable_outbound_atus(pcie);
163 /* Forward error response */
164 pci_dw_dbi_wr4(sc->dev, PCIE_ABSERR, 0x9401);
166 qorif_dw_pci_dbi_protect(sc, true);
167 pci_dw_dbi_wr1(sc->dev, PCIR_HDRTYPE, 1);
168 qorif_dw_pci_dbi_protect(sc, false);
170 // ls_pcie_drop_msg_tlp(pcie);
175 qorif_dw_pci_probe(device_t dev)
178 if (!ofw_bus_status_okay(dev))
181 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
184 device_set_desc(dev, "NPX Layaerscape PCI-E Controller");
185 return (BUS_PROBE_DEFAULT);
189 qorif_dw_pci_attach(device_t dev)
191 struct resource_map_request req;
192 struct resource_map map;
193 struct qorif_dw_pci_softc *sc;
198 sc = device_get_softc(dev);
199 node = ofw_bus_get_node(dev);
202 sc->soc_cfg = (struct qoriq_dw_pci_cfg *)
203 ofw_bus_search_compatible(dev, compat_data)->ocd_data;
206 sc->dw_sc.dbi_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
207 RF_ACTIVE | RF_UNMAPPED);
208 if (sc->dw_sc.dbi_res == NULL) {
209 device_printf(dev, "Cannot allocate DBI memory\n");
214 resource_init_map_request(&req);
215 req.memattr = VM_MEMATTR_DEVICE_NP;
216 rv = bus_map_resource(dev, SYS_RES_MEMORY, sc->dw_sc.dbi_res, &req,
219 device_printf(dev, "could not map memory.\n");
222 rman_set_mapping(sc->dw_sc.dbi_res, &map);
226 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
227 RF_ACTIVE | RF_SHAREABLE);
228 if (sc->irq_res == NULL) {
229 device_printf(dev, "Cannot allocate IRQ resources\n");
234 rv = pci_dw_init(dev);
238 qorif_dw_pci_init(sc);
240 /* Setup interrupt */
241 if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
242 qorif_dw_pci_intr, NULL, sc, &sc->intr_cookie)) {
243 device_printf(dev, "cannot setup interrupt handler\n");
248 return (bus_generic_attach(dev));
254 static device_method_t qorif_dw_pci_methods[] = {
255 /* Device interface */
256 DEVMETHOD(device_probe, qorif_dw_pci_probe),
257 DEVMETHOD(device_attach, qorif_dw_pci_attach),
259 DEVMETHOD(pci_dw_get_link, qorif_dw_pci_get_link),
264 DEFINE_CLASS_1(pcib, qorif_dw_pci_driver, qorif_dw_pci_methods,
265 sizeof(struct qorif_dw_pci_softc), pci_dw_driver);
266 DRIVER_MODULE( qorif_dw_pci, simplebus, qorif_dw_pci_driver, NULL, NULL);