1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Texas Instruments System Control Interface Protocol
4 * Based on include/linux/soc/ti/ti_sci_protocol.h from Linux.
5 *
6 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
7 * Nishanth Menon
8 * Lokesh Vutla <lokeshvutla@ti.com>
9 */
10
11 #ifndef __TISCI_PROTOCOL_H
12 #define __TISCI_PROTOCOL_H
13
14 /**
15 * struct ti_sci_version_info - version information structure
16 * @abi_major: Major ABI version. Change here implies risk of backward
17 * compatibility break.
18 * @abi_minor: Minor ABI version. Change here implies new feature addition,
19 * or compatible change in ABI.
20 * @firmware_revision: Firmware revision (not usually used).
21 * @firmware_description: Firmware description (not usually used).
22 */
23 struct ti_sci_version_info {
24 u8 abi_major;
25 u8 abi_minor;
26 u16 firmware_revision;
27 char firmware_description[32];
28 };
29
30 struct ti_sci_handle;
31
32 /**
33 * struct ti_sci_board_ops - Board config operations
34 * @board_config: Command to set the board configuration
35 * Returns 0 for successful exclusive request, else returns
36 * corresponding error message.
37 * @board_config_rm: Command to set the board resource management
38 * configuration
39 * Returns 0 for successful exclusive request, else returns
40 * corresponding error message.
41 * @board_config_security: Command to set the board security configuration
42 * Returns 0 for successful exclusive request, else returns
43 * corresponding error message.
44 * @board_config_pm: Command to trigger and set the board power and clock
45 * management related configuration
46 * Returns 0 for successful exclusive request, else returns
47 * corresponding error message.
48 */
49 struct ti_sci_board_ops {
50 int (*board_config)(const struct ti_sci_handle *handle,
51 u64 addr, u32 size);
52 int (*board_config_rm)(const struct ti_sci_handle *handle,
53 u64 addr, u32 size);
54 int (*board_config_security)(const struct ti_sci_handle *handle,
55 u64 addr, u32 size);
56 int (*board_config_pm)(const struct ti_sci_handle *handle,
57 u64 addr, u32 size);
58 };
59
60 /**
61 * struct ti_sci_dev_ops - Device control operations
62 * @get_device: Command to request for device managed by TISCI
63 * Returns 0 for successful exclusive request, else returns
64 * corresponding error message.
65 * @idle_device: Command to idle a device managed by TISCI
66 * Returns 0 for successful exclusive request, else returns
67 * corresponding error message.
68 * @put_device: Command to release a device managed by TISCI
69 * Returns 0 for successful release, else returns corresponding
70 * error message.
71 * @is_valid: Check if the device ID is a valid ID.
72 * Returns 0 if the ID is valid, else returns corresponding error.
73 * @get_context_loss_count: Command to retrieve context loss counter - this
74 * increments every time the device looses context. Overflow
75 * is possible.
76 * - count: pointer to u32 which will retrieve counter
77 * Returns 0 for successful information request and count has
78 * proper data, else returns corresponding error message.
79 * @is_idle: Reports back about device idle state
80 * - req_state: Returns requested idle state
81 * Returns 0 for successful information request and req_state and
82 * current_state has proper data, else returns corresponding error
83 * message.
84 * @is_stop: Reports back about device stop state
85 * - req_state: Returns requested stop state
86 * - current_state: Returns current stop state
87 * Returns 0 for successful information request and req_state and
88 * current_state has proper data, else returns corresponding error
89 * message.
90 * @is_on: Reports back about device ON(or active) state
91 * - req_state: Returns requested ON state
92 * - current_state: Returns current ON state
93 * Returns 0 for successful information request and req_state and
94 * current_state has proper data, else returns corresponding error
95 * message.
96 * @is_transitioning: Reports back if the device is in the middle of transition
97 * of state.
98 * -current_state: Returns 'true' if currently transitioning.
99 * @set_device_resets: Command to configure resets for device managed by TISCI.
100 * -reset_state: Device specific reset bit field
101 * Returns 0 for successful request, else returns
102 * corresponding error message.
103 * @get_device_resets: Command to read state of resets for device managed
104 * by TISCI.
105 * -reset_state: pointer to u32 which will retrieve resets
106 * Returns 0 for successful request, else returns
107 * corresponding error message.
108 *
109 * NOTE: for all these functions, the following parameters are generic in
110 * nature:
111 * -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
112 * -id: Device Identifier
113 *
114 * Request for the device - NOTE: the client MUST maintain integrity of
115 * usage count by balancing get_device with put_device. No refcounting is
116 * managed by driver for that purpose.
117 */
118 struct ti_sci_dev_ops {
119 int (*get_device)(const struct ti_sci_handle *handle, u32 id);
120 int (*idle_device)(const struct ti_sci_handle *handle, u32 id);
121 int (*put_device)(const struct ti_sci_handle *handle, u32 id);
122 int (*is_valid)(const struct ti_sci_handle *handle, u32 id);
123 int (*get_context_loss_count)(const struct ti_sci_handle *handle,
124 u32 id, u32 *count);
125 int (*is_idle)(const struct ti_sci_handle *handle, u32 id,
126 bool *requested_state);
127 int (*is_stop)(const struct ti_sci_handle *handle, u32 id,
128 bool *req_state, bool *current_state);
129 int (*is_on)(const struct ti_sci_handle *handle, u32 id,
130 bool *req_state, bool *current_state);
131 int (*is_transitioning)(const struct ti_sci_handle *handle, u32 id,
132 bool *current_state);
133 int (*set_device_resets)(const struct ti_sci_handle *handle, u32 id,
134 u32 reset_state);
135 int (*get_device_resets)(const struct ti_sci_handle *handle, u32 id,
136 u32 *reset_state);
137 };
138
139 /**
140 * struct ti_sci_clk_ops - Clock control operations
141 * @get_clock: Request for activation of clock and manage by processor
142 * - needs_ssc: 'true' if Spread Spectrum clock is desired.
143 * - can_change_freq: 'true' if frequency change is desired.
144 * - enable_input_term: 'true' if input termination is desired.
145 * @idle_clock: Request for Idling a clock managed by processor
146 * @put_clock: Release the clock to be auto managed by TISCI
147 * @is_auto: Is the clock being auto managed
148 * - req_state: state indicating if the clock is auto managed
149 * @is_on: Is the clock ON
150 * - req_state: if the clock is requested to be forced ON
151 * - current_state: if the clock is currently ON
152 * @is_off: Is the clock OFF
153 * - req_state: if the clock is requested to be forced OFF
154 * - current_state: if the clock is currently Gated
155 * @set_parent: Set the clock source of a specific device clock
156 * - parent_id: Parent clock identifier to set.
157 * @get_parent: Get the current clock source of a specific device clock
158 * - parent_id: Parent clock identifier which is the parent.
159 * @get_num_parents: Get the number of parents of the current clock source
160 * - num_parents: returns the number of parent clocks.
161 * @get_best_match_freq: Find a best matching frequency for a frequency
162 * range.
163 * - match_freq: Best matching frequency in Hz.
164 * @set_freq: Set the Clock frequency
165 * @get_freq: Get the Clock frequency
166 * - current_freq: Frequency in Hz that the clock is at.
167 *
168 * NOTE: for all these functions, the following parameters are generic in
169 * nature:
170 * -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
171 * -did: Device identifier this request is for
172 * -cid: Clock identifier for the device for this request.
173 * Each device has it's own set of clock inputs. This indexes
174 * which clock input to modify.
175 * -min_freq: The minimum allowable frequency in Hz. This is the minimum
176 * allowable programmed frequency and does not account for clock
177 * tolerances and jitter.
178 * -target_freq: The target clock frequency in Hz. A frequency will be
179 * processed as close to this target frequency as possible.
180 * -max_freq: The maximum allowable frequency in Hz. This is the maximum
181 * allowable programmed frequency and does not account for clock
182 * tolerances and jitter.
183 *
184 * Request for the clock - NOTE: the client MUST maintain integrity of
185 * usage count by balancing get_clock with put_clock. No refcounting is
186 * managed by driver for that purpose.
187 */
188 struct ti_sci_clk_ops {
189 int (*get_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid,
190 bool needs_ssc, bool can_change_freq,
191 bool enable_input_term);
192 int (*idle_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid);
193 int (*put_clock)(const struct ti_sci_handle *handle, u32 did, u8 cid);
194 int (*is_auto)(const struct ti_sci_handle *handle, u32 did, u8 cid,
195 bool *req_state);
196 int (*is_on)(const struct ti_sci_handle *handle, u32 did, u8 cid,
197 bool *req_state, bool *current_state);
198 int (*is_off)(const struct ti_sci_handle *handle, u32 did, u8 cid,
199 bool *req_state, bool *current_state);
200 int (*set_parent)(const struct ti_sci_handle *handle, u32 did, u8 cid,
201 u8 parent_id);
202 int (*get_parent)(const struct ti_sci_handle *handle, u32 did, u8 cid,
203 u8 *parent_id);
204 int (*get_num_parents)(const struct ti_sci_handle *handle, u32 did,
205 u8 cid, u8 *num_parents);
206 int (*get_best_match_freq)(const struct ti_sci_handle *handle, u32 did,
207 u8 cid, u64 min_freq, u64 target_freq,
208 u64 max_freq, u64 *match_freq);
209 int (*set_freq)(const struct ti_sci_handle *handle, u32 did, u8 cid,
210 u64 min_freq, u64 target_freq, u64 max_freq);
211 int (*get_freq)(const struct ti_sci_handle *handle, u32 did, u8 cid,
212 u64 *current_freq);
213 };
214
215 /**
216 * struct ti_sci_core_ops - SoC Core Operations
217 * @reboot_device: Reboot the SoC
218 * Returns 0 for successful request(ideally should never return),
219 * else returns corresponding error value.
220 */
221 struct ti_sci_core_ops {
222 int (*reboot_device)(const struct ti_sci_handle *handle);
223 };
224
225 /**
226 * struct ti_sci_proc_ops - Processor specific operations.
227 *
228 * @proc_request: Request for controlling a physical processor.
229 * The requesting host should be in the processor access list.
230 * @proc_release: Relinquish a physical processor control
231 * @proc_handover: Handover a physical processor control to another host
232 * in the permitted list.
233 * @set_proc_boot_cfg: Base configuration of the processor
234 * @set_proc_boot_ctrl: Setup limited control flags in specific cases.
235 * @proc_auth_boot_image:
236 * @get_proc_boot_status: Get the state of physical processor
237 *
238 * NOTE: for all these functions, the following parameters are generic in
239 * nature:
240 * -handle: Pointer to TISCI handle as retrieved by *ti_sci_get_handle
241 * -pid: Processor ID
242 *
243 */
244 struct ti_sci_proc_ops {
245 int (*proc_request)(const struct ti_sci_handle *handle, u8 pid);
246 int (*proc_release)(const struct ti_sci_handle *handle, u8 pid);
247 int (*proc_handover)(const struct ti_sci_handle *handle, u8 pid,
248 u8 hid);
249 int (*set_proc_boot_cfg)(const struct ti_sci_handle *handle, u8 pid,
250 u64 bv, u32 cfg_set, u32 cfg_clr);
251 int (*set_proc_boot_ctrl)(const struct ti_sci_handle *handle, u8 pid,
252 u32 ctrl_set, u32 ctrl_clr);
253 int (*proc_auth_boot_image)(const struct ti_sci_handle *handle, u8 pid,
254 u64 caddr);
255 int (*get_proc_boot_status)(const struct ti_sci_handle *handle, u8 pid,
256 u64 *bv, u32 *cfg_flags, u32 *ctrl_flags,
257 u32 *sts_flags);
258 };
259
260 /**
261 * struct ti_sci_ops - Function support for TI SCI
262 * @board_ops: Miscellaneous operations
263 * @dev_ops: Device specific operations
264 * @clk_ops: Clock specific operations
265 * @core_ops: Core specific operations
266 * @proc_ops: Processor specific operations
267 */
268 struct ti_sci_ops {
269 struct ti_sci_board_ops board_ops;
270 struct ti_sci_dev_ops dev_ops;
271 struct ti_sci_clk_ops clk_ops;
272 struct ti_sci_core_ops core_ops;
273 struct ti_sci_proc_ops proc_ops;
274 };
275
276 /**
277 * struct ti_sci_handle - Handle returned to TI SCI clients for usage.
278 * @ops: operations that are made available to TI SCI clients
279 * @version: structure containing version information
280 */
281 struct ti_sci_handle {
282 struct ti_sci_ops ops;
283 struct ti_sci_version_info version;
284 };
285
286 #if IS_ENABLED(CONFIG_TI_SCI_PROTOCOL)
287
288 const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev);
289 const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev);
290 const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
291 const char *property);
292
293 #else /* CONFIG_TI_SCI_PROTOCOL */
294
295 static inline
ti_sci_get_handle_from_sysfw(struct udevice * dev)296 const struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *dev)
297 {
298 return ERR_PTR(-EINVAL);
299 }
300
ti_sci_get_handle(struct udevice * dev)301 static inline const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev)
302 {
303 return ERR_PTR(-EINVAL);
304 }
305
306 static inline
ti_sci_get_by_phandle(struct udevice * dev,const char * property)307 const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
308 const char *property)
309 {
310 return ERR_PTR(-EINVAL);
311 }
312 #endif /* CONFIG_TI_SCI_PROTOCOL */
313
314 #endif /* __TISCI_PROTOCOL_H */
315