1 /*
2 * TISCI clock ops library
3 *
4 * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
5 * Lokesh Vutla <lokeshvutla@ti.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the
17 * distribution.
18 *
19 * Neither the name of Texas Instruments Incorporated nor the names of
20 * its contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
36 #include <string.h>
37 #include <sec_proxy.h>
38 #include <tisci_protocol.h>
39 #include <tisci.h>
41 static const char clock_state[MAX_CLOCK_HW_STATES + 1][MAX_CLOCK_STATE_LENGTH] = {
42 [MSG_CLOCK_HW_STATE_NOT_READY] = "CLK_STATE_NOT_READY",
43 [MSG_CLOCK_HW_STATE_READY] = "CLK_STATE_READY",
44 [MAX_CLOCK_HW_STATES] = "CLK_STATE_UNKNOWN"
45 };
47 static int ti_sci_set_clock_state(uint32_t dev_id, uint32_t clk_id,
48 uint32_t flags, uint8_t state)
49 {
50 struct ti_sci_msg_req_set_clock_state *req;
51 uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
52 struct k3_sec_proxy_msg msg;
54 memset(buf, 0, sizeof(buf));
55 ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
56 TI_SCI_MSG_SET_CLOCK_STATE, flags);
57 req = (struct ti_sci_msg_req_set_clock_state *)buf;
58 req->dev_id = dev_id;
59 if (clk_id < 255) {
60 req->clk_id = clk_id;
61 } else {
62 req->clk_id = 255;
63 req->clk_id_32 = clk_id;
64 }
65 req->request_state = state;
67 msg.len = sizeof(*req);
68 msg.buf = buf;
69 return ti_sci_xfer_msg(&msg);
70 }
72 int ti_sci_cmd_get_clk(uint32_t dev_id, uint32_t clk_id)
73 {
74 return ti_sci_set_clock_state(dev_id, clk_id,
75 MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
76 MSG_CLOCK_SW_STATE_REQ);
77 }
79 int ti_sci_cmd_put_clk(uint32_t dev_id, uint32_t clk_id)
80 {
81 return ti_sci_set_clock_state(dev_id, clk_id,
82 MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE,
83 MSG_CLOCK_SW_STATE_UNREQ);
84 }
86 const char *ti_sci_cmd_get_clk_state(uint32_t dev_id, uint32_t clk_id)
87 {
88 struct ti_sci_msg_resp_get_clock_state *resp;
89 struct ti_sci_msg_req_get_clock_state *req;
90 uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
91 struct k3_sec_proxy_msg msg;
92 int ret;
94 memset(buf, 0, sizeof(buf));
95 ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
96 TI_SCI_MSG_GET_CLOCK_STATE, 0);
97 req = (struct ti_sci_msg_req_get_clock_state *)buf;
98 req->dev_id = dev_id;
99 if (clk_id < 255) {
100 req->clk_id = clk_id;
101 } else {
102 req->clk_id = 255;
103 req->clk_id_32 = clk_id;
104 }
106 msg.len = sizeof(*req);
107 msg.buf = buf;
108 ret = ti_sci_xfer_msg(&msg);
109 if (ret)
110 return NULL;
112 resp = (struct ti_sci_msg_resp_get_clock_state *)buf;
114 return clock_state[resp->current_state];
115 }
117 int ti_sci_cmd_set_clk_freq(uint32_t dev_id, uint32_t clk_id, uint64_t freq)
118 {
119 struct ti_sci_msg_req_set_clock_freq *req;
120 uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
121 struct k3_sec_proxy_msg msg;
123 memset(buf, 0, sizeof(buf));
124 ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
125 TI_SCI_MSG_SET_CLOCK_FREQ, 0);
126 req = (struct ti_sci_msg_req_set_clock_freq *)buf;
127 req->dev_id = dev_id;
128 if (clk_id < 255) {
129 req->clk_id = clk_id;
130 } else {
131 req->clk_id = 255;
132 req->clk_id_32 = clk_id;
133 }
134 /* ToDo: Get best match freq and set that freq */
135 req->min_freq_hz = freq;
136 req->target_freq_hz = freq;
137 req->max_freq_hz = freq;
139 msg.len = sizeof(*req);
140 msg.buf = buf;
141 return ti_sci_xfer_msg(&msg);
142 }
144 int ti_sci_cmd_get_clk_freq(uint32_t dev_id, uint32_t clk_id, uint64_t *freq)
145 {
146 struct ti_sci_msg_resp_get_clock_freq *resp;
147 struct ti_sci_msg_req_get_clock_freq *req;
148 uint8_t buf[SEC_PROXY_MAX_MSG_SIZE];
149 struct k3_sec_proxy_msg msg;
150 int ret;
152 memset(buf, 0, sizeof(buf));
153 ti_sci_setup_header((struct ti_sci_msg_hdr *)buf,
154 TI_SCI_MSG_GET_CLOCK_FREQ, 0);
155 req = (struct ti_sci_msg_req_get_clock_freq *)buf;
156 req->dev_id = dev_id;
157 if (clk_id < 255) {
158 req->clk_id = clk_id;
159 } else {
160 req->clk_id = 255;
161 req->clk_id_32 = clk_id;
162 }
164 msg.len = sizeof(*req);
165 msg.buf = buf;
166 ret = ti_sci_xfer_msg(&msg);
167 if (ret)
168 return ret;
170 resp = (struct ti_sci_msg_resp_get_clock_freq *)buf;
171 *freq = resp->freq_hz;
173 return 0;
174 }