mirror of
https://github.com/AsahiLinux/u-boot
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a94a4071d4
Replace instances of http://www.ti.com with https://www.ti.com Signed-off-by: Nishanth Menon <nm@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 - https://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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