2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2019 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 /* Armada 8k DesignWare PCIe driver */
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/devmap.h>
39 #include <sys/kernel.h>
40 #include <sys/malloc.h>
41 #include <sys/module.h>
42 #include <sys/mutex.h>
44 #include <sys/sysctl.h>
46 #include <machine/bus.h>
47 #include <machine/intr.h>
48 #include <machine/resource.h>
50 #include <dev/extres/clk/clk.h>
51 #include <dev/extres/phy/phy.h>
52 #include <dev/ofw/ofw_bus.h>
53 #include <dev/ofw/ofw_bus_subr.h>
54 #include <dev/ofw/ofw_pci.h>
55 #include <dev/ofw/ofwpci.h>
56 #include <dev/pci/pcivar.h>
57 #include <dev/pci/pcireg.h>
58 #include <dev/pci/pcib_private.h>
59 #include <dev/pci/pci_dw.h>
62 #include "pci_dw_if.h"
64 #define MV_GLOBAL_CONTROL_REG 0x8000
65 #define PCIE_APP_LTSSM_EN (1 << 2)
67 #define MV_GLOBAL_STATUS_REG 0x8008
68 #define MV_STATUS_RDLH_LINK_UP (1 << 1)
69 #define MV_STATUS_PHY_LINK_UP (1 << 9)
71 #define MV_INT_CAUSE1 0x801C
72 #define MV_INT_MASK1 0x8020
73 #define INT_A_ASSERT_MASK (1 << 9)
74 #define INT_B_ASSERT_MASK (1 << 10)
75 #define INT_C_ASSERT_MASK (1 << 11)
76 #define INT_D_ASSERT_MASK (1 << 12)
78 #define MV_INT_CAUSE2 0x8024
79 #define MV_INT_MASK2 0x8028
80 #define MV_ERR_INT_CAUSE 0x802C
81 #define MV_ERR_INT_MASK 0x8030
83 #define MV_ARCACHE_TRC_REG 0x8050
84 #define MV_AWCACHE_TRC_REG 0x8054
85 #define MV_ARUSER_REG 0x805C
86 #define MV_AWUSER_REG 0x8060
88 #define MV_MAX_LANES 8
90 struct pci_dw_softc dw_sc;
93 struct resource *irq_res;
95 phy_t phy[MV_MAX_LANES];
100 /* Compatible devices. */
101 static struct ofw_compat_data compat_data[] = {
102 {"marvell,armada8k-pcie", 1},
107 pci_mv_phy_init(struct pci_mv_softc *sc)
111 for (i = 0; i < MV_MAX_LANES; i++) {
112 rv = phy_get_by_ofw_idx(sc->dev, sc->node, i, &(sc->phy[i]));
113 if (rv != 0 && rv != ENOENT) {
114 device_printf(sc->dev, "Cannot get phy[%d]\n", i);
115 /* XXX revert when phy driver will be implemented */
122 if (sc->phy[i] == NULL)
124 rv = phy_enable(sc->phy[i]);
126 device_printf(sc->dev, "Cannot enable phy[%d]\n", i);
133 for (i = 0; i < MV_MAX_LANES; i++) {
134 if (sc->phy[i] == NULL)
136 phy_release(sc->phy[i]);
143 pci_mv_init(struct pci_mv_softc *sc)
147 /* Set device configuration to RC */
148 reg = pci_dw_dbi_rd4(sc->dev, MV_GLOBAL_CONTROL_REG);
151 pci_dw_dbi_wr4(sc->dev, MV_GLOBAL_CONTROL_REG, reg);
153 /* AxCache master transaction attribures */
154 pci_dw_dbi_wr4(sc->dev, MV_ARCACHE_TRC_REG, 0x3511);
155 pci_dw_dbi_wr4(sc->dev, MV_AWCACHE_TRC_REG, 0x5311);
157 /* AxDomain master transaction attribures */
158 pci_dw_dbi_wr4(sc->dev, MV_ARUSER_REG, 0x0002);
159 pci_dw_dbi_wr4(sc->dev, MV_AWUSER_REG, 0x0002);
161 /* Enable all INTx interrupt (virtuual) pins */
162 reg = pci_dw_dbi_rd4(sc->dev, MV_INT_MASK1);
163 reg |= INT_A_ASSERT_MASK | INT_B_ASSERT_MASK |
164 INT_C_ASSERT_MASK | INT_D_ASSERT_MASK;
165 pci_dw_dbi_wr4(sc->dev, MV_INT_MASK1, reg);
167 /* Enable local interrupts */
168 pci_dw_dbi_wr4(sc->dev, DW_MSI_INTR0_MASK, 0xFFFFFFFF);
169 pci_dw_dbi_wr4(sc->dev, MV_INT_MASK1, 0xFFFFFFFF);
170 pci_dw_dbi_wr4(sc->dev, MV_INT_MASK2, 0xFFFFFFFD);
171 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE1, 0xFFFFFFFF);
172 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE2, 0xFFFFFFFF);
174 /* Errors have own interrupt, not yet populated in DTt */
175 pci_dw_dbi_wr4(sc->dev, MV_ERR_INT_MASK, 0);
178 static int pci_mv_intr(void *arg)
180 struct pci_mv_softc *sc = arg;
181 uint32_t cause1, cause2;
183 /* Ack all interrups */
184 cause1 = pci_dw_dbi_rd4(sc->dev, MV_INT_CAUSE1);
185 cause2 = pci_dw_dbi_rd4(sc->dev, MV_INT_CAUSE2);
187 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE1, cause1);
188 pci_dw_dbi_wr4(sc->dev, MV_INT_CAUSE2, cause2);
189 return (FILTER_HANDLED);
193 pci_mv_get_link(device_t dev, bool *status)
197 reg = pci_dw_dbi_rd4(dev, MV_GLOBAL_STATUS_REG);
198 if ((reg & (MV_STATUS_RDLH_LINK_UP | MV_STATUS_PHY_LINK_UP)) ==
199 (MV_STATUS_RDLH_LINK_UP | MV_STATUS_PHY_LINK_UP))
208 pci_mv_probe(device_t dev)
211 if (!ofw_bus_status_okay(dev))
214 if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
217 device_set_desc(dev, "Marvell Armada8K PCI-E Controller");
218 return (BUS_PROBE_DEFAULT);
222 pci_mv_attach(device_t dev)
224 struct pci_mv_softc *sc;
229 sc = device_get_softc(dev);
230 node = ofw_bus_get_node(dev);
235 sc->dw_sc.dbi_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
237 if (sc->dw_sc.dbi_res == NULL) {
238 device_printf(dev, "Cannot allocate DBI memory\n");
245 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
246 RF_ACTIVE | RF_SHAREABLE);
247 if (sc->irq_res == NULL) {
248 device_printf(dev, "Cannot allocate IRQ resources\n");
254 rv = clk_get_by_ofw_name(sc->dev, 0, "core", &sc->clk_core);
256 device_printf(sc->dev, "Cannot get 'core' clock\n");
261 rv = clk_get_by_ofw_name(sc->dev, 0, "reg", &sc->clk_reg);
263 device_printf(sc->dev, "Cannot get 'reg' clock\n");
268 rv = clk_enable(sc->clk_core);
270 device_printf(sc->dev, "Cannot enable 'core' clock\n");
275 rv = clk_enable(sc->clk_reg);
277 device_printf(sc->dev, "Cannot enable 'reg' clock\n");
282 rv = pci_mv_phy_init(sc);
286 rv = pci_dw_init(dev);
292 /* Setup interrupt */
293 if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
294 pci_mv_intr, NULL, sc, &sc->intr_cookie)) {
295 device_printf(dev, "cannot setup interrupt handler\n");
300 return (bus_generic_attach(dev));
306 static device_method_t pci_mv_methods[] = {
307 /* Device interface */
308 DEVMETHOD(device_probe, pci_mv_probe),
309 DEVMETHOD(device_attach, pci_mv_attach),
311 DEVMETHOD(pci_dw_get_link, pci_mv_get_link),
316 DEFINE_CLASS_1(pcib, pci_mv_driver, pci_mv_methods,
317 sizeof(struct pci_mv_softc), pci_dw_driver);
318 static devclass_t pci_mv_devclass;
319 DRIVER_MODULE( pci_mv, simplebus, pci_mv_driver, pci_mv_devclass,