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/soc/ti/ti_sci_protocol.h>
19 #include "ti_sci_proc.h"
21 #define INVALID_ID 0xffff
23 #define GTC_CNTCR_REG 0x0
24 #define GTC_CNTR_EN 0x3
27 * struct k3_arm64_privdata - Structure representing Remote processor data.
28 * @rproc_pwrdmn: rproc power domain data
29 * @rproc_rst: rproc reset control data
30 * @sci: Pointer to TISCI handle
31 * @tsp: TISCI processor control helper structure
32 * @gtc_base: Timer base address.
34 struct k3_arm64_privdata {
35 struct power_domain rproc_pwrdmn;
36 struct power_domain gtc_pwrdmn;
37 struct reset_ctl rproc_rst;
38 struct ti_sci_proc tsp;
43 * k3_arm64_load() - Load up the Remote processor image
44 * @dev: rproc device pointer
45 * @addr: Address at which image is available
46 * @size: size of the image
48 * Return: 0 if all goes good, else appropriate error message.
50 static int k3_arm64_load(struct udevice *dev, ulong addr, ulong size)
52 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
55 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
57 /* request for the processor */
58 ret = ti_sci_proc_request(&rproc->tsp);
62 return ti_sci_proc_set_config(&rproc->tsp, addr, 0, 0);
66 * k3_arm64_start() - Start the remote processor
67 * @dev: rproc device pointer
69 * Return: 0 if all went ok, else return appropriate error
71 static int k3_arm64_start(struct udevice *dev)
73 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
76 dev_dbg(dev, "%s\n", __func__);
78 ret = power_domain_on(&rproc->gtc_pwrdmn);
80 dev_err(dev, "power_domain_on() failed: %d\n", ret);
84 /* Enable the timer before starting remote core */
85 writel(GTC_CNTR_EN, rproc->gtc_base + GTC_CNTCR_REG);
88 * Setting the right clock frequency would have taken care by
89 * assigned-clock-rates during the device probe. So no need to
90 * set the frequency again here.
92 ret = power_domain_on(&rproc->rproc_pwrdmn);
94 dev_err(dev, "power_domain_on() failed: %d\n", ret);
98 return ti_sci_proc_release(&rproc->tsp);
102 * k3_arm64_init() - Initialize the remote processor
103 * @dev: rproc device pointer
105 * Return: 0 if all went ok, else return appropriate error
107 static int k3_arm64_init(struct udevice *dev)
109 dev_dbg(dev, "%s\n", __func__);
111 /* Enable the module */
112 dev_dbg(dev, "%s: rproc successfully initialized\n", __func__);
117 static const struct dm_rproc_ops k3_arm64_ops = {
118 .init = k3_arm64_init,
119 .load = k3_arm64_load,
120 .start = k3_arm64_start,
123 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
125 dev_dbg(dev, "%s\n", __func__);
127 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
128 if (IS_ERR(tsp->sci)) {
129 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
130 return PTR_ERR(tsp->sci);
133 tsp->proc_id = dev_read_u32_default(dev, "ti,sci-proc-id", INVALID_ID);
134 if (tsp->proc_id == INVALID_ID) {
135 dev_err(dev, "proc id not populated\n");
138 tsp->host_id = dev_read_u32_default(dev, "ti,sci-host-id", INVALID_ID);
139 tsp->ops = &tsp->sci->ops.proc_ops;
145 * k3_of_to_priv() - generate private data from device tree
146 * @dev: corresponding k3 remote processor device
147 * @priv: pointer to driver specific private data
149 * Return: 0 if all goes good, else appropriate error message.
151 static int k3_arm64_of_to_priv(struct udevice *dev,
152 struct k3_arm64_privdata *rproc)
156 dev_dbg(dev, "%s\n", __func__);
158 ret = power_domain_get_by_index(dev, &rproc->rproc_pwrdmn, 1);
160 dev_err(dev, "power_domain_get() failed: %d\n", ret);
164 ret = power_domain_get_by_index(dev, &rproc->gtc_pwrdmn, 0);
166 dev_err(dev, "power_domain_get() failed: %d\n", ret);
170 ret = reset_get_by_index(dev, 0, &rproc->rproc_rst);
172 dev_err(dev, "reset_get() failed: %d\n", ret);
176 ret = ti_sci_proc_of_to_priv(dev, &rproc->tsp);
180 rproc->gtc_base = dev_read_addr_ptr(dev);
181 if (!rproc->gtc_base) {
182 dev_err(dev, "Get address failed\n");
190 * k3_arm64_probe() - Basic probe
191 * @dev: corresponding k3 remote processor device
193 * Return: 0 if all goes good, else appropriate error message.
195 static int k3_arm64_probe(struct udevice *dev)
197 struct k3_arm64_privdata *priv;
200 dev_dbg(dev, "%s\n", __func__);
202 priv = dev_get_priv(dev);
204 ret = k3_arm64_of_to_priv(dev, priv);
206 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
210 dev_dbg(dev, "Remoteproc successfully probed\n");
215 static const struct udevice_id k3_arm64_ids[] = {
216 { .compatible = "ti,am654-arm64"},
217 { .compatible = "ti,am654-rproc"},
221 U_BOOT_DRIVER(k3_arm64) = {
223 .of_match = k3_arm64_ids,
224 .id = UCLASS_REMOTEPROC,
225 .ops = &k3_arm64_ops,
226 .probe = k3_arm64_probe,
227 .priv_auto_alloc_size = sizeof(struct k3_arm64_privdata),