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 <dm/device_compat.h>
19 #include <linux/err.h>
20 #include <linux/soc/ti/ti_sci_protocol.h>
21 #include "ti_sci_proc.h"
23 #define INVALID_ID 0xffff
25 #define GTC_CNTCR_REG 0x0
26 #define GTC_CNTR_EN 0x3
29 * struct k3_arm64_privdata - Structure representing Remote processor data.
30 * @rproc_pwrdmn: rproc power domain data
31 * @rproc_rst: rproc reset control data
32 * @sci: Pointer to TISCI handle
33 * @tsp: TISCI processor control helper structure
34 * @gtc_base: Timer base address.
36 struct k3_arm64_privdata {
37 struct power_domain rproc_pwrdmn;
38 struct power_domain gtc_pwrdmn;
39 struct reset_ctl rproc_rst;
40 struct ti_sci_proc tsp;
45 * k3_arm64_load() - Load up the Remote processor image
46 * @dev: rproc device pointer
47 * @addr: Address at which image is available
48 * @size: size of the image
50 * Return: 0 if all goes good, else appropriate error message.
52 static int k3_arm64_load(struct udevice *dev, ulong addr, ulong size)
54 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
57 dev_dbg(dev, "%s addr = 0x%lx, size = 0x%lx\n", __func__, addr, size);
59 /* request for the processor */
60 ret = ti_sci_proc_request(&rproc->tsp);
64 return ti_sci_proc_set_config(&rproc->tsp, addr, 0, 0);
68 * k3_arm64_start() - Start the remote processor
69 * @dev: rproc device pointer
71 * Return: 0 if all went ok, else return appropriate error
73 static int k3_arm64_start(struct udevice *dev)
75 struct k3_arm64_privdata *rproc = dev_get_priv(dev);
78 dev_dbg(dev, "%s\n", __func__);
80 ret = power_domain_on(&rproc->gtc_pwrdmn);
82 dev_err(dev, "power_domain_on() failed: %d\n", ret);
86 /* Enable the timer before starting remote core */
87 writel(GTC_CNTR_EN, rproc->gtc_base + GTC_CNTCR_REG);
90 * Setting the right clock frequency would have taken care by
91 * assigned-clock-rates during the device probe. So no need to
92 * set the frequency again here.
94 ret = power_domain_on(&rproc->rproc_pwrdmn);
96 dev_err(dev, "power_domain_on() failed: %d\n", ret);
100 return ti_sci_proc_release(&rproc->tsp);
104 * k3_arm64_init() - Initialize the remote processor
105 * @dev: rproc device pointer
107 * Return: 0 if all went ok, else return appropriate error
109 static int k3_arm64_init(struct udevice *dev)
111 dev_dbg(dev, "%s\n", __func__);
113 /* Enable the module */
114 dev_dbg(dev, "%s: rproc successfully initialized\n", __func__);
119 static const struct dm_rproc_ops k3_arm64_ops = {
120 .init = k3_arm64_init,
121 .load = k3_arm64_load,
122 .start = k3_arm64_start,
125 static int ti_sci_proc_of_to_priv(struct udevice *dev, struct ti_sci_proc *tsp)
127 dev_dbg(dev, "%s\n", __func__);
129 tsp->sci = ti_sci_get_by_phandle(dev, "ti,sci");
130 if (IS_ERR(tsp->sci)) {
131 dev_err(dev, "ti_sci get failed: %ld\n", PTR_ERR(tsp->sci));
132 return PTR_ERR(tsp->sci);
135 tsp->proc_id = dev_read_u32_default(dev, "ti,sci-proc-id", INVALID_ID);
136 if (tsp->proc_id == INVALID_ID) {
137 dev_err(dev, "proc id not populated\n");
140 tsp->host_id = dev_read_u32_default(dev, "ti,sci-host-id", INVALID_ID);
141 tsp->ops = &tsp->sci->ops.proc_ops;
147 * k3_of_to_priv() - generate private data from device tree
148 * @dev: corresponding k3 remote processor device
149 * @priv: pointer to driver specific private data
151 * Return: 0 if all goes good, else appropriate error message.
153 static int k3_arm64_of_to_priv(struct udevice *dev,
154 struct k3_arm64_privdata *rproc)
158 dev_dbg(dev, "%s\n", __func__);
160 ret = power_domain_get_by_index(dev, &rproc->rproc_pwrdmn, 1);
162 dev_err(dev, "power_domain_get() failed: %d\n", ret);
166 ret = power_domain_get_by_index(dev, &rproc->gtc_pwrdmn, 0);
168 dev_err(dev, "power_domain_get() failed: %d\n", ret);
172 ret = reset_get_by_index(dev, 0, &rproc->rproc_rst);
174 dev_err(dev, "reset_get() failed: %d\n", ret);
178 ret = ti_sci_proc_of_to_priv(dev, &rproc->tsp);
182 rproc->gtc_base = dev_read_addr_ptr(dev);
183 if (!rproc->gtc_base) {
184 dev_err(dev, "Get address failed\n");
192 * k3_arm64_probe() - Basic probe
193 * @dev: corresponding k3 remote processor device
195 * Return: 0 if all goes good, else appropriate error message.
197 static int k3_arm64_probe(struct udevice *dev)
199 struct k3_arm64_privdata *priv;
202 dev_dbg(dev, "%s\n", __func__);
204 priv = dev_get_priv(dev);
206 ret = k3_arm64_of_to_priv(dev, priv);
208 dev_dbg(dev, "%s: Probe failed with error %d\n", __func__, ret);
212 dev_dbg(dev, "Remoteproc successfully probed\n");
217 static const struct udevice_id k3_arm64_ids[] = {
218 { .compatible = "ti,am654-arm64"},
219 { .compatible = "ti,am654-rproc"},
223 U_BOOT_DRIVER(k3_arm64) = {
225 .of_match = k3_arm64_ids,
226 .id = UCLASS_REMOTEPROC,
227 .ops = &k3_arm64_ops,
228 .probe = k3_arm64_probe,
229 .priv_auto_alloc_size = sizeof(struct k3_arm64_privdata),
230 .flags = DM_FLAG_DEFAULT_PD_CTRL_OFF,