1 // SPDX-License-Identifier: GPL-2.0+
3 * Texas Instruments' K3 ARM64 Remoteproc driver
5 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
6 * Lokesh Vutla <lokeshvutla@ti.com>
12 #include <remoteproc.h>
17 #include <power-domain.h>
18 #include <linux/err.h>
19 #include <linux/soc/ti/ti_sci_protocol.h>
20 #include "ti_sci_proc.h"
22 #define INVALID_ID 0xffff
24 #define GTC_CNTCR_REG 0x0
25 #define GTC_CNTR_EN 0x3
28 * struct k3_arm64_privdata - Structure representing Remote processor data.
29 * @rproc_pwrdmn: rproc power domain data
30 * @rproc_rst: rproc reset control data
31 * @sci: Pointer to TISCI handle
32 * @tsp: TISCI processor control helper structure
33 * @gtc_base: Timer base address.
35 struct k3_arm64_privdata {
36 struct power_domain rproc_pwrdmn;
37 struct power_domain gtc_pwrdmn;
38 struct reset_ctl rproc_rst;
39 struct ti_sci_proc tsp;
44 * k3_arm64_load() - Load up the Remote processor image
45 * @dev: rproc device pointer
46 * @addr: Address at which image is available
47 * @size: size of the image
49 * Return: 0 if all goes good, else appropriate error message.
51 static int k3_arm64_load(struct udevice *dev, ulong addr, ulong size)
53 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
56 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
58 /* request for the processor */
59 ret = ti_sci_proc_request(&rproc->tsp);
63 return ti_sci_proc_set_config(&rproc->tsp, addr, 0, 0);
67 * k3_arm64_start() - Start the remote processor
68 * @dev: rproc device pointer
70 * Return: 0 if all went ok, else return appropriate error
72 static int k3_arm64_start(struct udevice *dev)
74 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
77 dev_dbg(dev, "%s\n", __func__);
79 ret = power_domain_on(&rproc->gtc_pwrdmn);
81 dev_err(dev, "power_domain_on() failed: %d\n", ret);
85 /* Enable the timer before starting remote core */
86 writel(GTC_CNTR_EN, rproc->gtc_base + GTC_CNTCR_REG);
89 * Setting the right clock frequency would have taken care by
90 * assigned-clock-rates during the device probe. So no need to
91 * set the frequency again here.
93 ret = power_domain_on(&rproc->rproc_pwrdmn);
95 dev_err(dev, "power_domain_on() failed: %d\n", ret);
99 return ti_sci_proc_release(&rproc->tsp);
103 * k3_arm64_init() - Initialize the remote processor
104 * @dev: rproc device pointer
106 * Return: 0 if all went ok, else return appropriate error
108 static int k3_arm64_init(struct udevice *dev)
110 dev_dbg(dev, "%s\n", __func__);
112 /* Enable the module */
113 dev_dbg(dev, "%s: rproc successfully initialized\n", __func__);
118 static const struct dm_rproc_ops k3_arm64_ops = {
119 .init = k3_arm64_init,
120 .load = k3_arm64_load,
121 .start = k3_arm64_start,
124 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
126 dev_dbg(dev, "%s\n", __func__);
128 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
129 if (IS_ERR(tsp->sci)) {
130 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
131 return PTR_ERR(tsp->sci);
134 tsp->proc_id = dev_read_u32_default(dev, "ti,sci-proc-id", INVALID_ID);
135 if (tsp->proc_id == INVALID_ID) {
136 dev_err(dev, "proc id not populated\n");
139 tsp->host_id = dev_read_u32_default(dev, "ti,sci-host-id", INVALID_ID);
140 tsp->ops = &tsp->sci->ops.proc_ops;
146 * k3_of_to_priv() - generate private data from device tree
147 * @dev: corresponding k3 remote processor device
148 * @priv: pointer to driver specific private data
150 * Return: 0 if all goes good, else appropriate error message.
152 static int k3_arm64_of_to_priv(struct udevice *dev,
153 struct k3_arm64_privdata *rproc)
157 dev_dbg(dev, "%s\n", __func__);
159 ret = power_domain_get_by_index(dev, &rproc->rproc_pwrdmn, 1);
161 dev_err(dev, "power_domain_get() failed: %d\n", ret);
165 ret = power_domain_get_by_index(dev, &rproc->gtc_pwrdmn, 0);
167 dev_err(dev, "power_domain_get() failed: %d\n", ret);
171 ret = reset_get_by_index(dev, 0, &rproc->rproc_rst);
173 dev_err(dev, "reset_get() failed: %d\n", ret);
177 ret = ti_sci_proc_of_to_priv(dev, &rproc->tsp);
181 rproc->gtc_base = dev_read_addr_ptr(dev);
182 if (!rproc->gtc_base) {
183 dev_err(dev, "Get address failed\n");
191 * k3_arm64_probe() - Basic probe
192 * @dev: corresponding k3 remote processor device
194 * Return: 0 if all goes good, else appropriate error message.
196 static int k3_arm64_probe(struct udevice *dev)
198 struct k3_arm64_privdata *priv;
201 dev_dbg(dev, "%s\n", __func__);
203 priv = dev_get_priv(dev);
205 ret = k3_arm64_of_to_priv(dev, priv);
207 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
211 dev_dbg(dev, "Remoteproc successfully probed\n");
216 static const struct udevice_id k3_arm64_ids[] = {
217 { .compatible = "ti,am654-arm64"},
218 { .compatible = "ti,am654-rproc"},
222 U_BOOT_DRIVER(k3_arm64) = {
224 .of_match = k3_arm64_ids,
225 .id = UCLASS_REMOTEPROC,
226 .ops = &k3_arm64_ops,
227 .probe = k3_arm64_probe,
228 .priv_auto_alloc_size = sizeof(struct k3_arm64_privdata),
229 .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,