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