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65f3afc6b9
Configuring master firewalls require the power of the cluster to be enabled before configuring them, change the load of rproc to configure the gtc clocks and start the cluster along with configuring the boot vector. The start of rproc will only start the core. Signed-off-by: Manorit Chawdhry <m-chawdhry@ti.com>
268 lines
6.4 KiB
C
268 lines
6.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Texas Instruments' K3 ARM64 Remoteproc driver
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*
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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* Lokesh Vutla <lokeshvutla@ti.com>
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*
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*/
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#include <common.h>
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#include <dm.h>
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#include <remoteproc.h>
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#include <errno.h>
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#include <clk.h>
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#include <reset.h>
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#include <asm/io.h>
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#include <power-domain.h>
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#include <dm/device_compat.h>
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#include <linux/err.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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#include "ti_sci_proc.h"
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#define INVALID_ID 0xffff
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#define GTC_CNTCR_REG 0x0
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#define GTC_CNTFID0_REG 0x20
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#define GTC_CNTR_EN 0x3
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/**
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* struct k3_arm64_privdata - Structure representing Remote processor data.
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* @rproc_pwrdmn: rproc power domain data
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* @rproc_rst: rproc reset control data
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* @sci: Pointer to TISCI handle
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* @tsp: TISCI processor control helper structure
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* @gtc_clk: GTC clock description
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* @gtc_base: Timer base address.
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*/
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struct k3_arm64_privdata {
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bool has_cluster_node;
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struct power_domain cluster_pwrdmn;
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struct power_domain rproc_pwrdmn;
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struct power_domain gtc_pwrdmn;
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struct reset_ctl rproc_rst;
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struct ti_sci_proc tsp;
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struct clk gtc_clk;
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void *gtc_base;
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};
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/**
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* k3_arm64_load() - Load up the Remote processor image
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* @dev: rproc device pointer
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* @addr: Address at which image is available
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* @size: size of the image
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_arm64_load(struct udevice *dev, ulong addr, ulong size)
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{
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struct k3_arm64_privdata *rproc = dev_get_priv(dev);
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ulong gtc_rate;
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int ret;
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dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
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/* request for the processor */
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ret = ti_sci_proc_request(&rproc->tsp);
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if (ret)
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return ret;
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ret = power_domain_on(&rproc->gtc_pwrdmn);
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if (ret) {
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dev_err(dev, "power_domain_on(&rproc->gtc_pwrdmn) failed: %d\n",
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ret);
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return ret;
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}
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gtc_rate = clk_get_rate(&rproc->gtc_clk);
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dev_dbg(dev, "GTC RATE= %d\n", (u32) gtc_rate);
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/* Store the clock frequency down for GTC users to pick up */
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writel((u32)gtc_rate, rproc->gtc_base + GTC_CNTFID0_REG);
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/* Enable the timer before starting remote core */
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writel(GTC_CNTR_EN, rproc->gtc_base + GTC_CNTCR_REG);
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/*
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* Setting the right clock frequency would have taken care by
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* assigned-clock-rates during the device probe. So no need to
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* set the frequency again here.
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*/
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if (rproc->has_cluster_node) {
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ret = power_domain_on(&rproc->cluster_pwrdmn);
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if (ret) {
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dev_err(dev,
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"power_domain_on(&rproc->cluster_pwrdmn) failed: %d\n",
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ret);
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return ret;
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}
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}
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return ti_sci_proc_set_config(&rproc->tsp, addr, 0, 0);
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}
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/**
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* k3_arm64_start() - Start the remote processor
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* @dev: rproc device pointer
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int k3_arm64_start(struct udevice *dev)
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{
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struct k3_arm64_privdata *rproc = dev_get_priv(dev);
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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ret = power_domain_on(&rproc->rproc_pwrdmn);
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if (ret) {
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dev_err(dev,
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"power_domain_on(&rproc->rproc_pwrdmn) failed: %d\n",
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ret);
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return ret;
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}
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return ti_sci_proc_release(&rproc->tsp);
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}
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/**
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* k3_arm64_init() - Initialize the remote processor
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* @dev: rproc device pointer
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*
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* Return: 0 if all went ok, else return appropriate error
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*/
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static int k3_arm64_init(struct udevice *dev)
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{
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dev_dbg(dev, "%s\n", __func__);
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/* Enable the module */
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dev_dbg(dev, "%s: rproc successfully initialized\n", __func__);
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return 0;
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}
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static const struct dm_rproc_ops k3_arm64_ops = {
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.init = k3_arm64_init,
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.load = k3_arm64_load,
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.start = k3_arm64_start,
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};
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static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
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{
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dev_dbg(dev, "%s\n", __func__);
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tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
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if (IS_ERR(tsp->sci)) {
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dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
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return PTR_ERR(tsp->sci);
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}
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tsp->proc_id = dev_read_u32_default(dev, "ti,sci-proc-id", INVALID_ID);
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if (tsp->proc_id == INVALID_ID) {
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dev_err(dev, "proc id not populated\n");
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return -ENOENT;
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}
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tsp->host_id = dev_read_u32_default(dev, "ti,sci-host-id", INVALID_ID);
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tsp->ops = &tsp->sci->ops.proc_ops;
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return 0;
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}
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/**
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* k3_of_to_priv() - generate private data from device tree
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* @dev: corresponding k3 remote processor device
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* @priv: pointer to driver specific private data
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_arm64_of_to_priv(struct udevice *dev,
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struct k3_arm64_privdata *rproc)
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{
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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/* Cluster needs to be powered on if firewalls are being configured */
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rproc->has_cluster_node = true;
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ret = power_domain_get_by_index(dev, &rproc->cluster_pwrdmn, 2);
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if (ret) {
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dev_dbg(dev, "warning: power_domain_get_cluster() failed: %d\n", ret);
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rproc->has_cluster_node = false;
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}
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ret = power_domain_get_by_index(dev, &rproc->rproc_pwrdmn, 1);
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if (ret) {
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dev_err(dev, "power_domain_get_rproc() failed: %d\n", ret);
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return ret;
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}
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ret = power_domain_get_by_index(dev, &rproc->gtc_pwrdmn, 0);
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if (ret) {
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dev_err(dev, "power_domain_get() failed: %d\n", ret);
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return ret;
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}
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ret = clk_get_by_index(dev, 0, &rproc->gtc_clk);
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if (ret) {
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dev_err(dev, "clk_get failed: %d\n", ret);
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return ret;
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}
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ret = reset_get_by_index(dev, 0, &rproc->rproc_rst);
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if (ret) {
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dev_err(dev, "reset_get() failed: %d\n", ret);
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return ret;
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}
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ret = ti_sci_proc_of_to_priv(dev, &rproc->tsp);
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if (ret)
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return ret;
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rproc->gtc_base = dev_read_addr_ptr(dev);
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if (!rproc->gtc_base) {
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dev_err(dev, "Get address failed\n");
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return -ENODEV;
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}
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return 0;
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}
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/**
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* k3_arm64_probe() - Basic probe
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* @dev: corresponding k3 remote processor device
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*
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* Return: 0 if all goes good, else appropriate error message.
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*/
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static int k3_arm64_probe(struct udevice *dev)
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{
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struct k3_arm64_privdata *priv;
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int ret;
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dev_dbg(dev, "%s\n", __func__);
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priv = dev_get_priv(dev);
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ret = k3_arm64_of_to_priv(dev, priv);
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if (ret) {
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dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
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return ret;
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}
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dev_dbg(dev, "Remoteproc successfully probed\n");
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return 0;
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}
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static const struct udevice_id k3_arm64_ids[] = {
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{ .compatible = "ti,am654-arm64"},
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{ .compatible = "ti,am654-rproc"},
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{}
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};
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U_BOOT_DRIVER(k3_arm64) = {
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.name = "k3_arm64",
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.of_match = k3_arm64_ids,
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.id = UCLASS_REMOTEPROC,
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.ops = &k3_arm64_ops,
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.probe = k3_arm64_probe,
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.priv_auto = sizeof(struct k3_arm64_privdata),
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.flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,
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};
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