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sys/arm64/broadcom/brcmmdio/mdio_ns2_pcie_phy.c
- This file was added.
| /*- | |||||
| * Copyright (c) 2019 Juniper Networks, Inc. | |||||
| * Copyright (c) 2019 Semihalf. | |||||
| * All rights reserved. | |||||
| * | |||||
| * Redistribution and use in source and binary forms, with or without | |||||
| * modification, are permitted provided that the following conditions | |||||
| * are met: | |||||
| * 1. Redistributions of source code must retain the above copyright | |||||
| * notice, this list of conditions and the following disclaimer. | |||||
| * 2. Redistributions in binary form must reproduce the above copyright | |||||
| * notice, this list of conditions and the following disclaimer in the | |||||
| * documentation and/or other materials provided with the distribution. | |||||
| * | |||||
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |||||
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |||||
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |||||
| * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |||||
| * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |||||
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |||||
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |||||
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |||||
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN | |||||
| * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |||||
| * POSSIBILITY OF SUCH DAMAGE. | |||||
| */ | |||||
| #include <sys/cdefs.h> | |||||
| __FBSDID("$FreeBSD$"); | |||||
| #include <sys/param.h> | |||||
| #include <sys/bus.h> | |||||
| #include <sys/kernel.h> | |||||
| #include <sys/module.h> | |||||
| #include <sys/rman.h> | |||||
| #include <sys/systm.h> | |||||
| #include <dev/fdt/simplebus.h> | |||||
| #include <dev/ofw/ofw_bus_subr.h> | |||||
| #include <dev/ofw/ofw_bus.h> | |||||
| #include <machine/bus.h> | |||||
| #include <machine/resource.h> | |||||
| #include "mdio_if.h" | |||||
| #define BLK_ADDR_REG_OFFSET 0x1f | |||||
| #define PLL_AFE1_100MHZ_BLK 0x2100 | |||||
| #define PLL_CLK_AMP_OFFSET 0x03 | |||||
| #define PLL_CLK_AMP_2P05V 0x2b18 | |||||
| struct ns2_pcie_phy_softc { | |||||
| uint32_t phy_id; | |||||
| }; | |||||
| static device_probe_t ns2_pcie_phy_fdt_probe; | |||||
| static device_attach_t ns2_pcie_phy_fdt_attach; | |||||
| static int ns2_pci_phy_init(device_t dev); | |||||
| static device_method_t ns2_pcie_phy_fdt_methods[] = { | |||||
| /* Device interface */ | |||||
| DEVMETHOD(device_probe, ns2_pcie_phy_fdt_probe), | |||||
| DEVMETHOD(device_attach, ns2_pcie_phy_fdt_attach), | |||||
| DEVMETHOD_END | |||||
| }; | |||||
| DEFINE_CLASS_0(ns2_pcie_phy, ns2_pcie_phy_fdt_driver, ns2_pcie_phy_fdt_methods, | |||||
| sizeof(struct ns2_pcie_phy_softc)); | |||||
| static devclass_t ns2_pcie_phy_fdt_devclass; | |||||
| static driver_t ns2_pcie_phy_driver = { | |||||
| "ns2_pcie_phy", | |||||
| ns2_pcie_phy_fdt_methods, | |||||
| sizeof(struct ns2_pcie_phy_softc) | |||||
| }; | |||||
| EARLY_DRIVER_MODULE(ns2_pcie_phy, brcm_mdionexus, ns2_pcie_phy_driver, | |||||
| ns2_pcie_phy_fdt_devclass, NULL, NULL, BUS_PASS_BUS + BUS_PASS_ORDER_MIDDLE); | |||||
| static int | |||||
| ns2_pci_phy_init(device_t dev) | |||||
| { | |||||
| struct ns2_pcie_phy_softc *sc; | |||||
| int err; | |||||
| sc = device_get_softc(dev); | |||||
| /* select the AFE 100MHz block page */ | |||||
| err = MDIO_WRITEREG(device_get_parent(dev), sc->phy_id, | |||||
| BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK); | |||||
| if (err) | |||||
| goto err; | |||||
| /* set the 100 MHz reference clock amplitude to 2.05 v */ | |||||
| err = MDIO_WRITEREG(device_get_parent(dev), sc->phy_id, | |||||
| PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V); | |||||
| if (err) | |||||
| goto err; | |||||
| return 0; | |||||
| err: | |||||
| device_printf(dev, "Error %d writing to phy\n", err); | |||||
| return (err); | |||||
| } | |||||
| static __inline void | |||||
| get_addr_size_cells(phandle_t node, pcell_t *addr_cells, pcell_t *size_cells) | |||||
| { | |||||
| *addr_cells = 2; | |||||
| /* Find address cells if present */ | |||||
| OF_getencprop(node, "#address-cells", addr_cells, sizeof(*addr_cells)); | |||||
| *size_cells = 2; | |||||
| /* Find size cells if present */ | |||||
| OF_getencprop(node, "#size-cells", size_cells, sizeof(*size_cells)); | |||||
| } | |||||
| static int | |||||
| ns2_pcie_phy_fdt_probe(device_t dev) | |||||
| { | |||||
| if (!ofw_bus_status_okay(dev)) | |||||
| return (ENXIO); | |||||
| if (!ofw_bus_is_compatible(dev, "brcm,ns2-pcie-phy")) | |||||
| return (ENXIO); | |||||
| device_set_desc(dev, "Broadcom NS2 PCIe PHY"); | |||||
| return (BUS_PROBE_SPECIFIC); | |||||
| } | |||||
| static int | |||||
| ns2_pcie_phy_fdt_attach(device_t dev) | |||||
| { | |||||
| struct ns2_pcie_phy_softc *sc; | |||||
| pcell_t addr_cells, size_cells, buf[2]; | |||||
| phandle_t node; | |||||
| sc = device_get_softc(dev); | |||||
| node = ofw_bus_get_node(dev); | |||||
| get_addr_size_cells(OF_parent(node), &addr_cells, &size_cells); | |||||
| if ((addr_cells != 1) || (size_cells != 0)) { | |||||
| device_printf(dev, | |||||
| "Only addr_cells=1 and size_cells=0 are supported\n"); | |||||
| return (EINVAL); | |||||
| } | |||||
| if (OF_getencprop(node, "reg", buf, sizeof(pcell_t)) < 0) | |||||
| return (ENXIO); | |||||
| sc->phy_id = buf[0]; | |||||
| if (ns2_pci_phy_init(dev) < 0) | |||||
| return (EINVAL); | |||||
| return (bus_generic_attach(dev)); | |||||
| } | |||||