qcom_tcsr: add initial top control and status register (TCSR) support
The Qualcomm TCSR is some top level glue between multiple IP blocks, both for doing configuration of said IP blocks, some IPC between them (mostly between multiple execution environments - eg trustzone and non-TZ), and interrupt status bits for them. However, for the IPQ4018/IPQ4019, it only is used as a small subset of IP block configuration. As for what it actually gets used as for other Qualcomm chipsets? Well, that'll have to wait. It's a bit of a mess in linux and openwrt. See, every different SoC support branch ends up with some different TCSR code for it. So instead, I'm going to land a single TCSR driver that I'm going to use for the IPQ4018/IPQ4019. When I add the next chipset, I'll figure out how to organise things so there's a single TCSR driver that works for multiple platforms.
This commit is contained in:
Adrian Chadd
parent
d27ba30884
commit
d11f81afd5
@ -54,6 +54,9 @@ device gpio
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device qcom_tlmm_ipq4018
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device fdt_pinctrl
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# TCSR (core top control and status registers)
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device qcom_tcsr
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options FDT
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# Disable CP14 work in DDB as TZ won't let us by default
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@ -25,3 +25,5 @@ dev/qcom_tlmm/qcom_tlmm_ipq4018.c optional qcom_tlmm_ipq4018
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dev/qcom_tlmm/qcom_tlmm_ipq4018_hw.c optional qcom_tlmm_ipq4018
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dev/qcom_tlmm/qcom_tlmm_pin.c optional qcom_tlmm_ipq4018
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dev/qcom_tlmm/qcom_tlmm_pinmux.c optional qcom_tlmm_ipq4018
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dev/qcom_tcsr/qcom_tcsr.c optional qcom_tcsr
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240
sys/dev/qcom_tcsr/qcom_tcsr.c
Normal file
240
sys/dev/qcom_tcsr/qcom_tcsr.c
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@ -0,0 +1,240 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021, Adrian Chadd <adrian@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/interrupt.h>
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#include <sys/malloc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/rman.h>
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#include <sys/gpio.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_extern.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/fdt/fdt_pinctrl.h>
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#include <dev/gpio/gpiobusvar.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/qcom_tcsr/qcom_tcsr_var.h>
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#include <dev/qcom_tcsr/qcom_tcsr_reg.h>
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/*
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* The linux-msm branches that support IPQ4018 use "ipq,tcsr".
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* The openwrt addons use qcom,tcsr. So for now support both.
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*
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* Also, it's not quite clear yet (since this is the first port!)
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* whether these options and registers are specific to the QCA IPQ401x
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* part or show up in different linux branches as different registers
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* but with the same driver/naming here. Let's hope that doesn't
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* happen.
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*/
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static struct ofw_compat_data compat_data[] = {
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{ "qcom,tcsr", 1 },
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{ "ipq,tcsr", 1 },
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{ NULL, 0 }
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};
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static int
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qcom_tcsr_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)
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return (ENXIO);
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device_set_desc(dev, "Qualcomm Core Top Control and Status Driver");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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qcom_tcsr_attach(device_t dev)
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{
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struct qcom_tcsr_softc *sc = device_get_softc(dev);
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int rid, ret;
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uint32_t val;
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sc->sc_dev = dev;
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/*
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* Hardware version is stored in the ofw_compat_data table.
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*/
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sc->hw_version =
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ofw_bus_search_compatible(dev, compat_data)->ocd_data;
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mtx_init(&sc->sc_mtx, device_get_nameunit(dev), NULL, MTX_DEF);
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rid = 0;
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sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (!sc->sc_mem_res) {
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device_printf(dev, "ERROR: Could not map memory\n");
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ret = ENXIO;
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goto error;
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}
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/*
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* Parse out the open firmware entries to see which particular
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* configurations we need to set here.
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*/
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/*
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* USB control select.
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*
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* For linux-msm on the IPQ401x, it actually calls into the SCM
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* to make the change. OpenWRT just does a register write.
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* We'll do the register write for now.
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*/
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if (OF_getencprop(ofw_bus_get_node(dev), "qcom,usb-ctrl-select",
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&val, sizeof(val)) > 0) {
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if (bootverbose)
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device_printf(sc->sc_dev,
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"USB control select (val 0x%x)\n",
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val);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_USB_PORT_SEL, val);
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}
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/*
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* USB high speed phy mode select.
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*/
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if (OF_getencprop(ofw_bus_get_node(dev), "qcom,usb-hsphy-mode-select",
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&val, sizeof(val)) > 0) {
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if (bootverbose)
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device_printf(sc->sc_dev,
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"USB high speed PHY mode select (val 0x%x)\n",
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val);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_USB_HSPHY_CONFIG, val);
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}
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/*
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* Ethernet switch subsystem interface type select.
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*/
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if (OF_getencprop(ofw_bus_get_node(dev), "qcom,ess-interface-select",
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&val, sizeof(val)) > 0) {
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uint32_t reg;
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if (bootverbose)
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device_printf(sc->sc_dev,
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"ESS external interface select (val 0x%x)\n",
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val);
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reg = QCOM_TCSR_READ_4(sc, QCOM_TCSR_ESS_INTERFACE_SEL_OFFSET);
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reg &= ~QCOM_TCSR_ESS_INTERFACE_SEL_MASK;
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reg |= (val & QCOM_TCSR_ESS_INTERFACE_SEL_MASK);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_ESS_INTERFACE_SEL_OFFSET, reg);
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}
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/*
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* WiFi GLB select.
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*/
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if (OF_getencprop(ofw_bus_get_node(dev), "qcom,wifi_glb_cfg",
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&val, sizeof(val)) > 0) {
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if (bootverbose)
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device_printf(sc->sc_dev,
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"WIFI GLB select (val 0x%x)\n",
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val);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_WIFI0_GLB_CFG_OFFSET, val);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_WIFI1_GLB_CFG_OFFSET, val);
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}
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/*
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* WiFi NOC interconnect memory type.
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*/
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if (OF_getencprop(ofw_bus_get_node(dev),
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"qcom,wifi_noc_memtype_m0_m2",
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&val, sizeof(val)) > 0) {
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if (bootverbose)
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device_printf(sc->sc_dev,
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"WiFi NOC memory type (val 0x%x)\n",
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val);
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QCOM_TCSR_WRITE_4(sc, QCOM_TCSR_PNOC_SNOC_MEMTYPE_M0_M2, val);
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}
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return (0);
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error:
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if (sc->sc_mem_res)
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
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mtx_destroy(&sc->sc_mtx);
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return (ret);
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}
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static int
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qcom_tcsr_detach(device_t dev)
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{
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struct qcom_tcsr_softc *sc = device_get_softc(dev);
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if (sc->sc_mem_res)
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bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_mem_res);
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mtx_destroy(&sc->sc_mtx);
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return (0);
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}
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static device_method_t qcom_tcsr_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, qcom_tcsr_probe),
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DEVMETHOD(device_attach, qcom_tcsr_attach),
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DEVMETHOD(device_detach, qcom_tcsr_detach),
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DEVMETHOD_END
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};
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static driver_t qcom_tcsr_driver = {
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"qcom_tcsr",
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qcom_tcsr_methods,
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sizeof(struct qcom_tcsr_softc),
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};
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static devclass_t qcom_tcsr_devclass;
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/*
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* This has to be run early, before the rest of the hardware is potentially
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* probed/attached.
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*/
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EARLY_DRIVER_MODULE(qcom_tcsr, simplebus, qcom_tcsr_driver,
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qcom_tcsr_devclass, 0, 0,
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BUS_PASS_CPU + BUS_PASS_ORDER_EARLY);
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SIMPLEBUS_PNP_INFO(compat_data);
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44
sys/dev/qcom_tcsr/qcom_tcsr_reg.h
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44
sys/dev/qcom_tcsr/qcom_tcsr_reg.h
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@ -0,0 +1,44 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __QCOM_TCSR_REG_H__
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#define __QCOM_TCSR_REG_H__
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#define QCOM_TCSR_USB_PORT_SEL_BASE 0x1A4000B0
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#define QCOM_TCSR_USB_PORT_SEL 0xB0
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#define QCOM_TCSR_USB_HSPHY_CONFIG 0x0C
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#define QCOM_TCSR_ESS_INTERFACE_SEL_OFFSET 0x0
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#define QCOM_TCSR_ESS_INTERFACE_SEL_MASK 0xF
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#define QCOM_TCSR_WIFI0_GLB_CFG_OFFSET 0x0
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#define QCOM_TCSR_WIFI1_GLB_CFG_OFFSET 0x4
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#define QCOM_TCSR_PNOC_SNOC_MEMTYPE_M0_M2 0x4
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#endif /* __QCOM_TCSR_REG_H__ */
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46
sys/dev/qcom_tcsr/qcom_tcsr_var.h
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46
sys/dev/qcom_tcsr/qcom_tcsr_var.h
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@ -0,0 +1,46 @@
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/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef __QCOM_TCSR_VAR_H__
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#define __QCOM_TCSR_VAR_H__
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#define QCOM_TCSR_READ_4(sc, reg) bus_read_4((sc)->sc_mem_res, (reg))
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#define QCOM_TCSR_WRITE_4(sc, reg, val) bus_write_4((sc)->sc_mem_res, \
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(reg), (val))
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struct qcom_tcsr_softc {
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device_t sc_dev;
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struct resource *sc_mem_res;
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uint32_t hw_version;
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struct mtx sc_mtx;
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};
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#endif /* __QCOM_TCSR_VAR_H__ */
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Block a user