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d8f48fbd VM |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* | |
3 | * SoundWire AMD Manager driver | |
4 | * | |
5 | * Copyright 2023 Advanced Micro Devices, Inc. | |
6 | */ | |
7 | ||
8 | #include <linux/completion.h> | |
9 | #include <linux/device.h> | |
10 | #include <linux/io.h> | |
11 | #include <linux/jiffies.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/soundwire/sdw.h> | |
16 | #include <linux/soundwire/sdw_registers.h> | |
81ff58ff | 17 | #include <linux/pm_runtime.h> |
d8f48fbd VM |
18 | #include <linux/wait.h> |
19 | #include <sound/pcm_params.h> | |
20 | #include <sound/soc.h> | |
21 | #include "bus.h" | |
22 | #include "amd_manager.h" | |
23 | ||
24 | #define DRV_NAME "amd_sdw_manager" | |
25 | ||
26 | #define to_amd_sdw(b) container_of(b, struct amd_sdw_manager, bus) | |
27 | ||
28 | static void amd_enable_sdw_pads(struct amd_sdw_manager *amd_manager) | |
29 | { | |
30 | u32 sw_pad_pulldown_val; | |
31 | u32 val; | |
32 | ||
33 | mutex_lock(amd_manager->acp_sdw_lock); | |
34 | val = readl(amd_manager->acp_mmio + ACP_SW_PAD_KEEPER_EN); | |
35 | val |= amd_manager->reg_mask->sw_pad_enable_mask; | |
36 | writel(val, amd_manager->acp_mmio + ACP_SW_PAD_KEEPER_EN); | |
37 | usleep_range(1000, 1500); | |
38 | ||
39 | sw_pad_pulldown_val = readl(amd_manager->acp_mmio + ACP_PAD_PULLDOWN_CTRL); | |
40 | sw_pad_pulldown_val &= amd_manager->reg_mask->sw_pad_pulldown_mask; | |
41 | writel(sw_pad_pulldown_val, amd_manager->acp_mmio + ACP_PAD_PULLDOWN_CTRL); | |
42 | mutex_unlock(amd_manager->acp_sdw_lock); | |
43 | } | |
44 | ||
45 | static int amd_init_sdw_manager(struct amd_sdw_manager *amd_manager) | |
46 | { | |
47 | u32 val; | |
48 | int ret; | |
49 | ||
50 | writel(AMD_SDW_ENABLE, amd_manager->mmio + ACP_SW_EN); | |
51 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, val, ACP_DELAY_US, | |
52 | AMD_SDW_TIMEOUT); | |
53 | if (ret) | |
54 | return ret; | |
55 | ||
56 | /* SoundWire manager bus reset */ | |
57 | writel(AMD_SDW_BUS_RESET_REQ, amd_manager->mmio + ACP_SW_BUS_RESET_CTRL); | |
58 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_BUS_RESET_CTRL, val, | |
59 | (val & AMD_SDW_BUS_RESET_DONE), ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
60 | if (ret) | |
61 | return ret; | |
62 | ||
63 | writel(AMD_SDW_BUS_RESET_CLEAR_REQ, amd_manager->mmio + ACP_SW_BUS_RESET_CTRL); | |
64 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_BUS_RESET_CTRL, val, !val, | |
65 | ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
66 | if (ret) { | |
67 | dev_err(amd_manager->dev, "Failed to reset SoundWire manager instance%d\n", | |
68 | amd_manager->instance); | |
69 | return ret; | |
70 | } | |
71 | ||
72 | writel(AMD_SDW_DISABLE, amd_manager->mmio + ACP_SW_EN); | |
73 | return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, !val, ACP_DELAY_US, | |
74 | AMD_SDW_TIMEOUT); | |
75 | } | |
76 | ||
77 | static int amd_enable_sdw_manager(struct amd_sdw_manager *amd_manager) | |
78 | { | |
79 | u32 val; | |
80 | ||
81 | writel(AMD_SDW_ENABLE, amd_manager->mmio + ACP_SW_EN); | |
82 | return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, val, ACP_DELAY_US, | |
83 | AMD_SDW_TIMEOUT); | |
84 | } | |
85 | ||
86 | static int amd_disable_sdw_manager(struct amd_sdw_manager *amd_manager) | |
87 | { | |
88 | u32 val; | |
89 | ||
90 | writel(AMD_SDW_DISABLE, amd_manager->mmio + ACP_SW_EN); | |
91 | /* | |
92 | * After invoking manager disable sequence, check whether | |
93 | * manager has executed clock stop sequence. In this case, | |
94 | * manager should ignore checking enable status register. | |
95 | */ | |
96 | val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
97 | if (val) | |
98 | return 0; | |
99 | return readl_poll_timeout(amd_manager->mmio + ACP_SW_EN_STATUS, val, !val, ACP_DELAY_US, | |
100 | AMD_SDW_TIMEOUT); | |
101 | } | |
102 | ||
103 | static void amd_enable_sdw_interrupts(struct amd_sdw_manager *amd_manager) | |
104 | { | |
105 | struct sdw_manager_reg_mask *reg_mask = amd_manager->reg_mask; | |
106 | u32 val; | |
107 | ||
108 | mutex_lock(amd_manager->acp_sdw_lock); | |
109 | val = readl(amd_manager->acp_mmio + ACP_EXTERNAL_INTR_CNTL(amd_manager->instance)); | |
110 | val |= reg_mask->acp_sdw_intr_mask; | |
111 | writel(val, amd_manager->acp_mmio + ACP_EXTERNAL_INTR_CNTL(amd_manager->instance)); | |
112 | mutex_unlock(amd_manager->acp_sdw_lock); | |
113 | ||
114 | writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio + | |
115 | ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); | |
116 | writel(AMD_SDW_IRQ_MASK_8TO11, amd_manager->mmio + | |
117 | ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); | |
118 | writel(AMD_SDW_IRQ_ERROR_MASK, amd_manager->mmio + ACP_SW_ERROR_INTR_MASK); | |
119 | } | |
120 | ||
121 | static void amd_disable_sdw_interrupts(struct amd_sdw_manager *amd_manager) | |
122 | { | |
123 | struct sdw_manager_reg_mask *reg_mask = amd_manager->reg_mask; | |
124 | u32 val; | |
125 | ||
126 | mutex_lock(amd_manager->acp_sdw_lock); | |
127 | val = readl(amd_manager->acp_mmio + ACP_EXTERNAL_INTR_CNTL(amd_manager->instance)); | |
128 | val &= ~reg_mask->acp_sdw_intr_mask; | |
129 | writel(val, amd_manager->acp_mmio + ACP_EXTERNAL_INTR_CNTL(amd_manager->instance)); | |
130 | mutex_unlock(amd_manager->acp_sdw_lock); | |
131 | ||
132 | writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); | |
133 | writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); | |
134 | writel(0x00, amd_manager->mmio + ACP_SW_ERROR_INTR_MASK); | |
135 | } | |
136 | ||
81ff58ff VM |
137 | static int amd_deinit_sdw_manager(struct amd_sdw_manager *amd_manager) |
138 | { | |
139 | amd_disable_sdw_interrupts(amd_manager); | |
140 | return amd_disable_sdw_manager(amd_manager); | |
141 | } | |
142 | ||
d8f48fbd VM |
143 | static void amd_sdw_set_frameshape(struct amd_sdw_manager *amd_manager) |
144 | { | |
145 | u32 frame_size; | |
146 | ||
147 | frame_size = (amd_manager->rows_index << 3) | amd_manager->cols_index; | |
148 | writel(frame_size, amd_manager->mmio + ACP_SW_FRAMESIZE); | |
149 | } | |
150 | ||
151 | static void amd_sdw_ctl_word_prep(u32 *lower_word, u32 *upper_word, struct sdw_msg *msg, | |
152 | int cmd_offset) | |
153 | { | |
154 | u32 upper_data; | |
155 | u32 lower_data = 0; | |
156 | u16 addr; | |
157 | u8 upper_addr, lower_addr; | |
158 | u8 data = 0; | |
159 | ||
160 | addr = msg->addr + cmd_offset; | |
161 | upper_addr = (addr & 0xFF00) >> 8; | |
162 | lower_addr = addr & 0xFF; | |
163 | ||
164 | if (msg->flags == SDW_MSG_FLAG_WRITE) | |
165 | data = msg->buf[cmd_offset]; | |
166 | ||
167 | upper_data = FIELD_PREP(AMD_SDW_MCP_CMD_DEV_ADDR, msg->dev_num); | |
168 | upper_data |= FIELD_PREP(AMD_SDW_MCP_CMD_COMMAND, msg->flags + 2); | |
169 | upper_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_ADDR_HIGH, upper_addr); | |
170 | lower_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_ADDR_LOW, lower_addr); | |
171 | lower_data |= FIELD_PREP(AMD_SDW_MCP_CMD_REG_DATA, data); | |
172 | ||
173 | *upper_word = upper_data; | |
174 | *lower_word = lower_data; | |
175 | } | |
176 | ||
177 | static u64 amd_sdw_send_cmd_get_resp(struct amd_sdw_manager *amd_manager, u32 lower_data, | |
178 | u32 upper_data) | |
179 | { | |
180 | u64 resp; | |
181 | u32 lower_resp, upper_resp; | |
182 | u32 sts; | |
183 | int ret; | |
184 | ||
185 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts, | |
186 | !(sts & AMD_SDW_IMM_CMD_BUSY), ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
187 | if (ret) { | |
188 | dev_err(amd_manager->dev, "SDW%x previous cmd status clear failed\n", | |
189 | amd_manager->instance); | |
190 | return ret; | |
191 | } | |
192 | ||
193 | if (sts & AMD_SDW_IMM_RES_VALID) { | |
194 | dev_err(amd_manager->dev, "SDW%x manager is in bad state\n", amd_manager->instance); | |
195 | writel(0x00, amd_manager->mmio + ACP_SW_IMM_CMD_STS); | |
196 | } | |
197 | writel(upper_data, amd_manager->mmio + ACP_SW_IMM_CMD_UPPER_WORD); | |
198 | writel(lower_data, amd_manager->mmio + ACP_SW_IMM_CMD_LOWER_QWORD); | |
199 | ||
200 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts, | |
201 | (sts & AMD_SDW_IMM_RES_VALID), ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
202 | if (ret) { | |
203 | dev_err(amd_manager->dev, "SDW%x cmd response timeout occurred\n", | |
204 | amd_manager->instance); | |
205 | return ret; | |
206 | } | |
207 | upper_resp = readl(amd_manager->mmio + ACP_SW_IMM_RESP_UPPER_WORD); | |
208 | lower_resp = readl(amd_manager->mmio + ACP_SW_IMM_RESP_LOWER_QWORD); | |
209 | ||
210 | writel(AMD_SDW_IMM_RES_VALID, amd_manager->mmio + ACP_SW_IMM_CMD_STS); | |
211 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_IMM_CMD_STS, sts, | |
212 | !(sts & AMD_SDW_IMM_RES_VALID), ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
213 | if (ret) { | |
214 | dev_err(amd_manager->dev, "SDW%x cmd status retry failed\n", | |
215 | amd_manager->instance); | |
216 | return ret; | |
217 | } | |
218 | resp = upper_resp; | |
219 | resp = (resp << 32) | lower_resp; | |
220 | return resp; | |
221 | } | |
222 | ||
223 | static enum sdw_command_response | |
224 | amd_program_scp_addr(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg) | |
225 | { | |
226 | struct sdw_msg scp_msg = {0}; | |
227 | u64 response_buf[2] = {0}; | |
228 | u32 upper_data = 0, lower_data = 0; | |
229 | int index; | |
230 | ||
231 | scp_msg.dev_num = msg->dev_num; | |
232 | scp_msg.addr = SDW_SCP_ADDRPAGE1; | |
233 | scp_msg.buf = &msg->addr_page1; | |
234 | scp_msg.flags = SDW_MSG_FLAG_WRITE; | |
235 | amd_sdw_ctl_word_prep(&lower_data, &upper_data, &scp_msg, 0); | |
236 | response_buf[0] = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data); | |
237 | scp_msg.addr = SDW_SCP_ADDRPAGE2; | |
238 | scp_msg.buf = &msg->addr_page2; | |
239 | amd_sdw_ctl_word_prep(&lower_data, &upper_data, &scp_msg, 0); | |
240 | response_buf[1] = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data); | |
241 | ||
242 | for (index = 0; index < 2; index++) { | |
243 | if (response_buf[index] == -ETIMEDOUT) { | |
244 | dev_err_ratelimited(amd_manager->dev, | |
245 | "SCP_addrpage command timeout for Slave %d\n", | |
246 | msg->dev_num); | |
247 | return SDW_CMD_TIMEOUT; | |
248 | } else if (!(response_buf[index] & AMD_SDW_MCP_RESP_ACK)) { | |
249 | if (response_buf[index] & AMD_SDW_MCP_RESP_NACK) { | |
250 | dev_err_ratelimited(amd_manager->dev, | |
251 | "SCP_addrpage NACKed for Slave %d\n", | |
252 | msg->dev_num); | |
253 | return SDW_CMD_FAIL; | |
254 | } | |
255 | dev_dbg_ratelimited(amd_manager->dev, "SCP_addrpage ignored for Slave %d\n", | |
256 | msg->dev_num); | |
257 | return SDW_CMD_IGNORED; | |
258 | } | |
259 | } | |
260 | return SDW_CMD_OK; | |
261 | } | |
262 | ||
263 | static int amd_prep_msg(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg) | |
264 | { | |
265 | int ret; | |
266 | ||
267 | if (msg->page) { | |
268 | ret = amd_program_scp_addr(amd_manager, msg); | |
269 | if (ret) { | |
270 | msg->len = 0; | |
271 | return ret; | |
272 | } | |
273 | } | |
274 | switch (msg->flags) { | |
275 | case SDW_MSG_FLAG_READ: | |
276 | case SDW_MSG_FLAG_WRITE: | |
277 | break; | |
278 | default: | |
279 | dev_err(amd_manager->dev, "Invalid msg cmd: %d\n", msg->flags); | |
280 | return -EINVAL; | |
281 | } | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static enum sdw_command_response amd_sdw_fill_msg_resp(struct amd_sdw_manager *amd_manager, | |
286 | struct sdw_msg *msg, u64 response, | |
287 | int offset) | |
288 | { | |
289 | if (response & AMD_SDW_MCP_RESP_ACK) { | |
290 | if (msg->flags == SDW_MSG_FLAG_READ) | |
291 | msg->buf[offset] = FIELD_GET(AMD_SDW_MCP_RESP_RDATA, response); | |
292 | } else { | |
293 | if (response == -ETIMEDOUT) { | |
294 | dev_err_ratelimited(amd_manager->dev, "command timeout for Slave %d\n", | |
295 | msg->dev_num); | |
296 | return SDW_CMD_TIMEOUT; | |
297 | } else if (response & AMD_SDW_MCP_RESP_NACK) { | |
298 | dev_err_ratelimited(amd_manager->dev, | |
299 | "command response NACK received for Slave %d\n", | |
300 | msg->dev_num); | |
301 | return SDW_CMD_FAIL; | |
302 | } | |
303 | dev_err_ratelimited(amd_manager->dev, "command is ignored for Slave %d\n", | |
304 | msg->dev_num); | |
305 | return SDW_CMD_IGNORED; | |
306 | } | |
307 | return SDW_CMD_OK; | |
308 | } | |
309 | ||
310 | static unsigned int _amd_sdw_xfer_msg(struct amd_sdw_manager *amd_manager, struct sdw_msg *msg, | |
311 | int cmd_offset) | |
312 | { | |
313 | u64 response; | |
314 | u32 upper_data = 0, lower_data = 0; | |
315 | ||
316 | amd_sdw_ctl_word_prep(&lower_data, &upper_data, msg, cmd_offset); | |
317 | response = amd_sdw_send_cmd_get_resp(amd_manager, lower_data, upper_data); | |
318 | return amd_sdw_fill_msg_resp(amd_manager, msg, response, cmd_offset); | |
319 | } | |
320 | ||
321 | static enum sdw_command_response amd_sdw_xfer_msg(struct sdw_bus *bus, struct sdw_msg *msg) | |
322 | { | |
323 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
324 | int ret, i; | |
325 | ||
326 | ret = amd_prep_msg(amd_manager, msg); | |
327 | if (ret) | |
328 | return SDW_CMD_FAIL_OTHER; | |
329 | for (i = 0; i < msg->len; i++) { | |
330 | ret = _amd_sdw_xfer_msg(amd_manager, msg, i); | |
331 | if (ret) | |
332 | return ret; | |
333 | } | |
334 | return SDW_CMD_OK; | |
335 | } | |
336 | ||
65f93e40 VM |
337 | static void amd_sdw_fill_slave_status(struct amd_sdw_manager *amd_manager, u16 index, u32 status) |
338 | { | |
339 | switch (status) { | |
340 | case SDW_SLAVE_ATTACHED: | |
341 | case SDW_SLAVE_UNATTACHED: | |
342 | case SDW_SLAVE_ALERT: | |
343 | amd_manager->status[index] = status; | |
344 | break; | |
345 | default: | |
346 | amd_manager->status[index] = SDW_SLAVE_RESERVED; | |
347 | break; | |
348 | } | |
349 | } | |
350 | ||
351 | static void amd_sdw_process_ping_status(u64 response, struct amd_sdw_manager *amd_manager) | |
352 | { | |
353 | u64 slave_stat; | |
354 | u32 val; | |
355 | u16 dev_index; | |
356 | ||
357 | /* slave status response */ | |
358 | slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response); | |
359 | slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8; | |
360 | dev_dbg(amd_manager->dev, "slave_stat:0x%llx\n", slave_stat); | |
361 | for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { | |
362 | val = (slave_stat >> (dev_index * 2)) & AMD_SDW_MCP_SLAVE_STATUS_MASK; | |
363 | dev_dbg(amd_manager->dev, "val:0x%x\n", val); | |
364 | amd_sdw_fill_slave_status(amd_manager, dev_index, val); | |
365 | } | |
366 | } | |
367 | ||
368 | static void amd_sdw_read_and_process_ping_status(struct amd_sdw_manager *amd_manager) | |
369 | { | |
370 | u64 response; | |
371 | ||
372 | mutex_lock(&amd_manager->bus.msg_lock); | |
373 | response = amd_sdw_send_cmd_get_resp(amd_manager, 0, 0); | |
374 | mutex_unlock(&amd_manager->bus.msg_lock); | |
375 | amd_sdw_process_ping_status(response, amd_manager); | |
376 | } | |
377 | ||
d8f48fbd VM |
378 | static u32 amd_sdw_read_ping_status(struct sdw_bus *bus) |
379 | { | |
380 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
381 | u64 response; | |
382 | u32 slave_stat; | |
383 | ||
384 | response = amd_sdw_send_cmd_get_resp(amd_manager, 0, 0); | |
385 | /* slave status from ping response */ | |
386 | slave_stat = FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_0_3, response); | |
387 | slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STAT_4_11, response) << 8; | |
388 | dev_dbg(amd_manager->dev, "slave_stat:0x%x\n", slave_stat); | |
389 | return slave_stat; | |
390 | } | |
391 | ||
392 | static int amd_sdw_compute_params(struct sdw_bus *bus) | |
393 | { | |
394 | struct sdw_transport_data t_data = {0}; | |
395 | struct sdw_master_runtime *m_rt; | |
396 | struct sdw_port_runtime *p_rt; | |
397 | struct sdw_bus_params *b_params = &bus->params; | |
398 | int port_bo, hstart, hstop, sample_int; | |
399 | unsigned int rate, bps; | |
400 | ||
401 | port_bo = 0; | |
402 | hstart = 1; | |
403 | hstop = bus->params.col - 1; | |
404 | t_data.hstop = hstop; | |
405 | t_data.hstart = hstart; | |
406 | ||
407 | list_for_each_entry(m_rt, &bus->m_rt_list, bus_node) { | |
408 | rate = m_rt->stream->params.rate; | |
409 | bps = m_rt->stream->params.bps; | |
410 | sample_int = (bus->params.curr_dr_freq / rate); | |
411 | list_for_each_entry(p_rt, &m_rt->port_list, port_node) { | |
412 | port_bo = (p_rt->num * 64) + 1; | |
413 | dev_dbg(bus->dev, "p_rt->num=%d hstart=%d hstop=%d port_bo=%d\n", | |
414 | p_rt->num, hstart, hstop, port_bo); | |
415 | sdw_fill_xport_params(&p_rt->transport_params, p_rt->num, | |
416 | false, SDW_BLK_GRP_CNT_1, sample_int, | |
417 | port_bo, port_bo >> 8, hstart, hstop, | |
418 | SDW_BLK_PKG_PER_PORT, 0x0); | |
419 | ||
420 | sdw_fill_port_params(&p_rt->port_params, | |
421 | p_rt->num, bps, | |
422 | SDW_PORT_FLOW_MODE_ISOCH, | |
423 | b_params->m_data_mode); | |
424 | t_data.hstart = hstart; | |
425 | t_data.hstop = hstop; | |
426 | t_data.block_offset = port_bo; | |
427 | t_data.sub_block_offset = 0; | |
428 | } | |
429 | sdw_compute_slave_ports(m_rt, &t_data); | |
430 | } | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static int amd_sdw_port_params(struct sdw_bus *bus, struct sdw_port_params *p_params, | |
435 | unsigned int bank) | |
436 | { | |
437 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
438 | u32 frame_fmt_reg, dpn_frame_fmt; | |
439 | ||
440 | dev_dbg(amd_manager->dev, "p_params->num:0x%x\n", p_params->num); | |
441 | switch (amd_manager->instance) { | |
442 | case ACP_SDW0: | |
443 | frame_fmt_reg = sdw0_manager_dp_reg[p_params->num].frame_fmt_reg; | |
444 | break; | |
445 | case ACP_SDW1: | |
446 | frame_fmt_reg = sdw1_manager_dp_reg[p_params->num].frame_fmt_reg; | |
447 | break; | |
448 | default: | |
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | dpn_frame_fmt = readl(amd_manager->mmio + frame_fmt_reg); | |
453 | u32p_replace_bits(&dpn_frame_fmt, p_params->flow_mode, AMD_DPN_FRAME_FMT_PFM); | |
454 | u32p_replace_bits(&dpn_frame_fmt, p_params->data_mode, AMD_DPN_FRAME_FMT_PDM); | |
455 | u32p_replace_bits(&dpn_frame_fmt, p_params->bps - 1, AMD_DPN_FRAME_FMT_WORD_LEN); | |
456 | writel(dpn_frame_fmt, amd_manager->mmio + frame_fmt_reg); | |
457 | return 0; | |
458 | } | |
459 | ||
460 | static int amd_sdw_transport_params(struct sdw_bus *bus, | |
461 | struct sdw_transport_params *params, | |
462 | enum sdw_reg_bank bank) | |
463 | { | |
464 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
465 | u32 dpn_frame_fmt; | |
466 | u32 dpn_sampleinterval; | |
467 | u32 dpn_hctrl; | |
468 | u32 dpn_offsetctrl; | |
469 | u32 dpn_lanectrl; | |
470 | u32 frame_fmt_reg, sample_int_reg, hctrl_dp0_reg; | |
471 | u32 offset_reg, lane_ctrl_ch_en_reg; | |
472 | ||
473 | switch (amd_manager->instance) { | |
474 | case ACP_SDW0: | |
475 | frame_fmt_reg = sdw0_manager_dp_reg[params->port_num].frame_fmt_reg; | |
476 | sample_int_reg = sdw0_manager_dp_reg[params->port_num].sample_int_reg; | |
477 | hctrl_dp0_reg = sdw0_manager_dp_reg[params->port_num].hctrl_dp0_reg; | |
478 | offset_reg = sdw0_manager_dp_reg[params->port_num].offset_reg; | |
479 | lane_ctrl_ch_en_reg = sdw0_manager_dp_reg[params->port_num].lane_ctrl_ch_en_reg; | |
480 | break; | |
481 | case ACP_SDW1: | |
482 | frame_fmt_reg = sdw1_manager_dp_reg[params->port_num].frame_fmt_reg; | |
483 | sample_int_reg = sdw1_manager_dp_reg[params->port_num].sample_int_reg; | |
484 | hctrl_dp0_reg = sdw1_manager_dp_reg[params->port_num].hctrl_dp0_reg; | |
485 | offset_reg = sdw1_manager_dp_reg[params->port_num].offset_reg; | |
486 | lane_ctrl_ch_en_reg = sdw1_manager_dp_reg[params->port_num].lane_ctrl_ch_en_reg; | |
487 | break; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | writel(AMD_SDW_SSP_COUNTER_VAL, amd_manager->mmio + ACP_SW_SSP_COUNTER); | |
492 | ||
493 | dpn_frame_fmt = readl(amd_manager->mmio + frame_fmt_reg); | |
494 | u32p_replace_bits(&dpn_frame_fmt, params->blk_pkg_mode, AMD_DPN_FRAME_FMT_BLK_PKG_MODE); | |
495 | u32p_replace_bits(&dpn_frame_fmt, params->blk_grp_ctrl, AMD_DPN_FRAME_FMT_BLK_GRP_CTRL); | |
496 | u32p_replace_bits(&dpn_frame_fmt, SDW_STREAM_PCM, AMD_DPN_FRAME_FMT_PCM_OR_PDM); | |
497 | writel(dpn_frame_fmt, amd_manager->mmio + frame_fmt_reg); | |
498 | ||
499 | dpn_sampleinterval = params->sample_interval - 1; | |
500 | writel(dpn_sampleinterval, amd_manager->mmio + sample_int_reg); | |
501 | ||
502 | dpn_hctrl = FIELD_PREP(AMD_DPN_HCTRL_HSTOP, params->hstop); | |
503 | dpn_hctrl |= FIELD_PREP(AMD_DPN_HCTRL_HSTART, params->hstart); | |
504 | writel(dpn_hctrl, amd_manager->mmio + hctrl_dp0_reg); | |
505 | ||
506 | dpn_offsetctrl = FIELD_PREP(AMD_DPN_OFFSET_CTRL_1, params->offset1); | |
507 | dpn_offsetctrl |= FIELD_PREP(AMD_DPN_OFFSET_CTRL_2, params->offset2); | |
508 | writel(dpn_offsetctrl, amd_manager->mmio + offset_reg); | |
509 | ||
510 | /* | |
511 | * lane_ctrl_ch_en_reg will be used to program lane_ctrl and ch_mask | |
512 | * parameters. | |
513 | */ | |
514 | dpn_lanectrl = readl(amd_manager->mmio + lane_ctrl_ch_en_reg); | |
515 | u32p_replace_bits(&dpn_lanectrl, params->lane_ctrl, AMD_DPN_CH_EN_LCTRL); | |
516 | writel(dpn_lanectrl, amd_manager->mmio + lane_ctrl_ch_en_reg); | |
517 | return 0; | |
518 | } | |
519 | ||
520 | static int amd_sdw_port_enable(struct sdw_bus *bus, | |
521 | struct sdw_enable_ch *enable_ch, | |
522 | unsigned int bank) | |
523 | { | |
524 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
525 | u32 dpn_ch_enable; | |
526 | u32 lane_ctrl_ch_en_reg; | |
527 | ||
528 | switch (amd_manager->instance) { | |
529 | case ACP_SDW0: | |
530 | lane_ctrl_ch_en_reg = sdw0_manager_dp_reg[enable_ch->port_num].lane_ctrl_ch_en_reg; | |
531 | break; | |
532 | case ACP_SDW1: | |
533 | lane_ctrl_ch_en_reg = sdw1_manager_dp_reg[enable_ch->port_num].lane_ctrl_ch_en_reg; | |
534 | break; | |
535 | default: | |
536 | return -EINVAL; | |
537 | } | |
538 | ||
539 | /* | |
540 | * lane_ctrl_ch_en_reg will be used to program lane_ctrl and ch_mask | |
541 | * parameters. | |
542 | */ | |
543 | dpn_ch_enable = readl(amd_manager->mmio + lane_ctrl_ch_en_reg); | |
544 | u32p_replace_bits(&dpn_ch_enable, enable_ch->ch_mask, AMD_DPN_CH_EN_CHMASK); | |
545 | if (enable_ch->enable) | |
546 | writel(dpn_ch_enable, amd_manager->mmio + lane_ctrl_ch_en_reg); | |
547 | else | |
548 | writel(0, amd_manager->mmio + lane_ctrl_ch_en_reg); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | static int sdw_master_read_amd_prop(struct sdw_bus *bus) | |
553 | { | |
554 | struct amd_sdw_manager *amd_manager = to_amd_sdw(bus); | |
555 | struct fwnode_handle *link; | |
556 | struct sdw_master_prop *prop; | |
557 | u32 quirk_mask = 0; | |
558 | u32 wake_en_mask = 0; | |
559 | u32 power_mode_mask = 0; | |
560 | char name[32]; | |
561 | ||
562 | prop = &bus->prop; | |
563 | /* Find manager handle */ | |
564 | snprintf(name, sizeof(name), "mipi-sdw-link-%d-subproperties", bus->link_id); | |
565 | link = device_get_named_child_node(bus->dev, name); | |
566 | if (!link) { | |
567 | dev_err(bus->dev, "Manager node %s not found\n", name); | |
568 | return -EIO; | |
569 | } | |
570 | fwnode_property_read_u32(link, "amd-sdw-enable", &quirk_mask); | |
571 | if (!(quirk_mask & AMD_SDW_QUIRK_MASK_BUS_ENABLE)) | |
572 | prop->hw_disabled = true; | |
573 | prop->quirks = SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH | | |
574 | SDW_MASTER_QUIRKS_CLEAR_INITIAL_PARITY; | |
575 | ||
576 | fwnode_property_read_u32(link, "amd-sdw-wakeup-enable", &wake_en_mask); | |
577 | amd_manager->wake_en_mask = wake_en_mask; | |
578 | fwnode_property_read_u32(link, "amd-sdw-power-mode", &power_mode_mask); | |
579 | amd_manager->power_mode_mask = power_mode_mask; | |
580 | return 0; | |
581 | } | |
582 | ||
583 | static int amd_prop_read(struct sdw_bus *bus) | |
584 | { | |
585 | sdw_master_read_prop(bus); | |
586 | sdw_master_read_amd_prop(bus); | |
587 | return 0; | |
588 | } | |
589 | ||
590 | static const struct sdw_master_port_ops amd_sdw_port_ops = { | |
591 | .dpn_set_port_params = amd_sdw_port_params, | |
592 | .dpn_set_port_transport_params = amd_sdw_transport_params, | |
593 | .dpn_port_enable_ch = amd_sdw_port_enable, | |
594 | }; | |
595 | ||
596 | static const struct sdw_master_ops amd_sdw_ops = { | |
597 | .read_prop = amd_prop_read, | |
598 | .xfer_msg = amd_sdw_xfer_msg, | |
599 | .read_ping_status = amd_sdw_read_ping_status, | |
600 | }; | |
601 | ||
2b13596f VM |
602 | static int amd_sdw_hw_params(struct snd_pcm_substream *substream, |
603 | struct snd_pcm_hw_params *params, | |
604 | struct snd_soc_dai *dai) | |
605 | { | |
606 | struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai); | |
607 | struct sdw_amd_dai_runtime *dai_runtime; | |
608 | struct sdw_stream_config sconfig; | |
609 | struct sdw_port_config *pconfig; | |
610 | int ch, dir; | |
611 | int ret; | |
612 | ||
613 | dai_runtime = amd_manager->dai_runtime_array[dai->id]; | |
614 | if (!dai_runtime) | |
615 | return -EIO; | |
616 | ||
617 | ch = params_channels(params); | |
618 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) | |
619 | dir = SDW_DATA_DIR_RX; | |
620 | else | |
621 | dir = SDW_DATA_DIR_TX; | |
622 | dev_dbg(amd_manager->dev, "dir:%d dai->id:0x%x\n", dir, dai->id); | |
623 | ||
624 | sconfig.direction = dir; | |
625 | sconfig.ch_count = ch; | |
626 | sconfig.frame_rate = params_rate(params); | |
627 | sconfig.type = dai_runtime->stream_type; | |
628 | ||
629 | sconfig.bps = snd_pcm_format_width(params_format(params)); | |
630 | ||
631 | /* Port configuration */ | |
632 | pconfig = kzalloc(sizeof(*pconfig), GFP_KERNEL); | |
633 | if (!pconfig) { | |
634 | ret = -ENOMEM; | |
635 | goto error; | |
636 | } | |
637 | ||
638 | pconfig->num = dai->id; | |
639 | pconfig->ch_mask = (1 << ch) - 1; | |
640 | ret = sdw_stream_add_master(&amd_manager->bus, &sconfig, | |
641 | pconfig, 1, dai_runtime->stream); | |
642 | if (ret) | |
643 | dev_err(amd_manager->dev, "add manager to stream failed:%d\n", ret); | |
644 | ||
645 | kfree(pconfig); | |
646 | error: | |
647 | return ret; | |
648 | } | |
649 | ||
650 | static int amd_sdw_hw_free(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) | |
651 | { | |
652 | struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai); | |
653 | struct sdw_amd_dai_runtime *dai_runtime; | |
654 | int ret; | |
655 | ||
656 | dai_runtime = amd_manager->dai_runtime_array[dai->id]; | |
657 | if (!dai_runtime) | |
658 | return -EIO; | |
659 | ||
660 | ret = sdw_stream_remove_master(&amd_manager->bus, dai_runtime->stream); | |
661 | if (ret < 0) | |
662 | dev_err(dai->dev, "remove manager from stream %s failed: %d\n", | |
663 | dai_runtime->stream->name, ret); | |
664 | return ret; | |
665 | } | |
666 | ||
667 | static int amd_set_sdw_stream(struct snd_soc_dai *dai, void *stream, int direction) | |
668 | { | |
669 | struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai); | |
670 | struct sdw_amd_dai_runtime *dai_runtime; | |
671 | ||
672 | dai_runtime = amd_manager->dai_runtime_array[dai->id]; | |
673 | if (stream) { | |
674 | /* first paranoia check */ | |
675 | if (dai_runtime) { | |
676 | dev_err(dai->dev, "dai_runtime already allocated for dai %s\n", dai->name); | |
677 | return -EINVAL; | |
678 | } | |
679 | ||
680 | /* allocate and set dai_runtime info */ | |
681 | dai_runtime = kzalloc(sizeof(*dai_runtime), GFP_KERNEL); | |
682 | if (!dai_runtime) | |
683 | return -ENOMEM; | |
684 | ||
685 | dai_runtime->stream_type = SDW_STREAM_PCM; | |
686 | dai_runtime->bus = &amd_manager->bus; | |
687 | dai_runtime->stream = stream; | |
688 | amd_manager->dai_runtime_array[dai->id] = dai_runtime; | |
689 | } else { | |
690 | /* second paranoia check */ | |
691 | if (!dai_runtime) { | |
692 | dev_err(dai->dev, "dai_runtime not allocated for dai %s\n", dai->name); | |
693 | return -EINVAL; | |
694 | } | |
695 | ||
696 | /* for NULL stream we release allocated dai_runtime */ | |
697 | kfree(dai_runtime); | |
698 | amd_manager->dai_runtime_array[dai->id] = NULL; | |
699 | } | |
700 | return 0; | |
701 | } | |
702 | ||
703 | static int amd_pcm_set_sdw_stream(struct snd_soc_dai *dai, void *stream, int direction) | |
704 | { | |
705 | return amd_set_sdw_stream(dai, stream, direction); | |
706 | } | |
707 | ||
708 | static void *amd_get_sdw_stream(struct snd_soc_dai *dai, int direction) | |
709 | { | |
710 | struct amd_sdw_manager *amd_manager = snd_soc_dai_get_drvdata(dai); | |
711 | struct sdw_amd_dai_runtime *dai_runtime; | |
712 | ||
713 | dai_runtime = amd_manager->dai_runtime_array[dai->id]; | |
714 | if (!dai_runtime) | |
715 | return ERR_PTR(-EINVAL); | |
716 | ||
717 | return dai_runtime->stream; | |
718 | } | |
719 | ||
720 | static const struct snd_soc_dai_ops amd_sdw_dai_ops = { | |
721 | .hw_params = amd_sdw_hw_params, | |
722 | .hw_free = amd_sdw_hw_free, | |
723 | .set_stream = amd_pcm_set_sdw_stream, | |
724 | .get_stream = amd_get_sdw_stream, | |
725 | }; | |
726 | ||
727 | static const struct snd_soc_component_driver amd_sdw_dai_component = { | |
728 | .name = "soundwire", | |
729 | }; | |
730 | ||
731 | static int amd_sdw_register_dais(struct amd_sdw_manager *amd_manager) | |
732 | { | |
733 | struct sdw_amd_dai_runtime **dai_runtime_array; | |
734 | struct snd_soc_dai_driver *dais; | |
735 | struct snd_soc_pcm_stream *stream; | |
736 | struct device *dev; | |
737 | int i, num_dais; | |
738 | ||
739 | dev = amd_manager->dev; | |
740 | num_dais = amd_manager->num_dout_ports + amd_manager->num_din_ports; | |
741 | dais = devm_kcalloc(dev, num_dais, sizeof(*dais), GFP_KERNEL); | |
742 | if (!dais) | |
743 | return -ENOMEM; | |
744 | ||
745 | dai_runtime_array = devm_kcalloc(dev, num_dais, | |
746 | sizeof(struct sdw_amd_dai_runtime *), | |
747 | GFP_KERNEL); | |
748 | if (!dai_runtime_array) | |
749 | return -ENOMEM; | |
750 | amd_manager->dai_runtime_array = dai_runtime_array; | |
751 | for (i = 0; i < num_dais; i++) { | |
752 | dais[i].name = devm_kasprintf(dev, GFP_KERNEL, "SDW%d Pin%d", amd_manager->instance, | |
753 | i); | |
754 | if (!dais[i].name) | |
755 | return -ENOMEM; | |
756 | if (i < amd_manager->num_dout_ports) | |
757 | stream = &dais[i].playback; | |
758 | else | |
759 | stream = &dais[i].capture; | |
760 | ||
761 | stream->channels_min = 2; | |
762 | stream->channels_max = 2; | |
763 | stream->rates = SNDRV_PCM_RATE_48000; | |
764 | stream->formats = SNDRV_PCM_FMTBIT_S16_LE; | |
765 | ||
766 | dais[i].ops = &amd_sdw_dai_ops; | |
767 | dais[i].id = i; | |
768 | } | |
769 | ||
770 | return devm_snd_soc_register_component(dev, &amd_sdw_dai_component, | |
771 | dais, num_dais); | |
772 | } | |
773 | ||
65f93e40 VM |
774 | static void amd_sdw_update_slave_status_work(struct work_struct *work) |
775 | { | |
776 | struct amd_sdw_manager *amd_manager = | |
777 | container_of(work, struct amd_sdw_manager, amd_sdw_work); | |
778 | int retry_count = 0; | |
779 | ||
780 | if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) { | |
781 | writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); | |
782 | writel(0, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); | |
783 | } | |
784 | ||
785 | update_status: | |
786 | sdw_handle_slave_status(&amd_manager->bus, amd_manager->status); | |
787 | /* | |
788 | * During the peripheral enumeration sequence, the SoundWire manager interrupts | |
789 | * are masked. Once the device number programming is done for all peripherals, | |
790 | * interrupts will be unmasked. Read the peripheral device status from ping command | |
791 | * and process the response. This sequence will ensure all peripheral devices enumerated | |
792 | * and initialized properly. | |
793 | */ | |
794 | if (amd_manager->status[0] == SDW_SLAVE_ATTACHED) { | |
795 | if (retry_count++ < SDW_MAX_DEVICES) { | |
796 | writel(AMD_SDW_IRQ_MASK_0TO7, amd_manager->mmio + | |
797 | ACP_SW_STATE_CHANGE_STATUS_MASK_0TO7); | |
798 | writel(AMD_SDW_IRQ_MASK_8TO11, amd_manager->mmio + | |
799 | ACP_SW_STATE_CHANGE_STATUS_MASK_8TO11); | |
800 | amd_sdw_read_and_process_ping_status(amd_manager); | |
801 | goto update_status; | |
802 | } else { | |
803 | dev_err_ratelimited(amd_manager->dev, | |
804 | "Device0 detected after %d iterations\n", | |
805 | retry_count); | |
806 | } | |
807 | } | |
808 | } | |
809 | ||
810 | static void amd_sdw_update_slave_status(u32 status_change_0to7, u32 status_change_8to11, | |
811 | struct amd_sdw_manager *amd_manager) | |
812 | { | |
813 | u64 slave_stat; | |
814 | u32 val; | |
815 | int dev_index; | |
816 | ||
817 | if (status_change_0to7 == AMD_SDW_SLAVE_0_ATTACHED) | |
818 | memset(amd_manager->status, 0, sizeof(amd_manager->status)); | |
819 | slave_stat = status_change_0to7; | |
820 | slave_stat |= FIELD_GET(AMD_SDW_MCP_SLAVE_STATUS_8TO_11, status_change_8to11) << 32; | |
821 | dev_dbg(amd_manager->dev, "status_change_0to7:0x%x status_change_8to11:0x%x\n", | |
822 | status_change_0to7, status_change_8to11); | |
823 | if (slave_stat) { | |
824 | for (dev_index = 0; dev_index <= SDW_MAX_DEVICES; ++dev_index) { | |
825 | if (slave_stat & AMD_SDW_MCP_SLAVE_STATUS_VALID_MASK(dev_index)) { | |
826 | val = (slave_stat >> AMD_SDW_MCP_SLAVE_STAT_SHIFT_MASK(dev_index)) & | |
827 | AMD_SDW_MCP_SLAVE_STATUS_MASK; | |
828 | amd_sdw_fill_slave_status(amd_manager, dev_index, val); | |
829 | } | |
830 | } | |
831 | } | |
832 | } | |
833 | ||
66c87883 VM |
834 | static void amd_sdw_process_wake_event(struct amd_sdw_manager *amd_manager) |
835 | { | |
836 | pm_request_resume(amd_manager->dev); | |
837 | writel(0x00, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance)); | |
838 | writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11); | |
839 | } | |
840 | ||
65f93e40 VM |
841 | static void amd_sdw_irq_thread(struct work_struct *work) |
842 | { | |
843 | struct amd_sdw_manager *amd_manager = | |
844 | container_of(work, struct amd_sdw_manager, amd_sdw_irq_thread); | |
845 | u32 status_change_8to11; | |
846 | u32 status_change_0to7; | |
847 | ||
848 | status_change_8to11 = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11); | |
849 | status_change_0to7 = readl(amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7); | |
850 | dev_dbg(amd_manager->dev, "[SDW%d] SDW INT: 0to7=0x%x, 8to11=0x%x\n", | |
851 | amd_manager->instance, status_change_0to7, status_change_8to11); | |
66c87883 VM |
852 | if (status_change_8to11 & AMD_SDW_WAKE_STAT_MASK) |
853 | return amd_sdw_process_wake_event(amd_manager); | |
854 | ||
65f93e40 VM |
855 | if (status_change_8to11 & AMD_SDW_PREQ_INTR_STAT) { |
856 | amd_sdw_read_and_process_ping_status(amd_manager); | |
857 | } else { | |
858 | /* Check for the updated status on peripheral device */ | |
859 | amd_sdw_update_slave_status(status_change_0to7, status_change_8to11, amd_manager); | |
860 | } | |
861 | if (status_change_8to11 || status_change_0to7) | |
862 | schedule_work(&amd_manager->amd_sdw_work); | |
863 | writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_8TO11); | |
864 | writel(0x00, amd_manager->mmio + ACP_SW_STATE_CHANGE_STATUS_0TO7); | |
865 | } | |
866 | ||
d8f48fbd VM |
867 | static void amd_sdw_probe_work(struct work_struct *work) |
868 | { | |
869 | struct amd_sdw_manager *amd_manager = container_of(work, struct amd_sdw_manager, | |
870 | probe_work); | |
871 | struct sdw_master_prop *prop; | |
872 | int ret; | |
873 | ||
874 | prop = &amd_manager->bus.prop; | |
875 | if (!prop->hw_disabled) { | |
876 | amd_enable_sdw_pads(amd_manager); | |
877 | ret = amd_init_sdw_manager(amd_manager); | |
878 | if (ret) | |
879 | return; | |
880 | amd_enable_sdw_interrupts(amd_manager); | |
881 | ret = amd_enable_sdw_manager(amd_manager); | |
882 | if (ret) | |
883 | return; | |
884 | amd_sdw_set_frameshape(amd_manager); | |
885 | } | |
81ff58ff VM |
886 | /* Enable runtime PM */ |
887 | pm_runtime_set_autosuspend_delay(amd_manager->dev, AMD_SDW_MASTER_SUSPEND_DELAY_MS); | |
888 | pm_runtime_use_autosuspend(amd_manager->dev); | |
889 | pm_runtime_mark_last_busy(amd_manager->dev); | |
890 | pm_runtime_set_active(amd_manager->dev); | |
891 | pm_runtime_enable(amd_manager->dev); | |
d8f48fbd VM |
892 | } |
893 | ||
894 | static int amd_sdw_manager_probe(struct platform_device *pdev) | |
895 | { | |
896 | const struct acp_sdw_pdata *pdata = pdev->dev.platform_data; | |
897 | struct resource *res; | |
898 | struct device *dev = &pdev->dev; | |
899 | struct sdw_master_prop *prop; | |
900 | struct sdw_bus_params *params; | |
901 | struct amd_sdw_manager *amd_manager; | |
902 | int ret; | |
903 | ||
904 | amd_manager = devm_kzalloc(dev, sizeof(struct amd_sdw_manager), GFP_KERNEL); | |
905 | if (!amd_manager) | |
906 | return -ENOMEM; | |
907 | ||
908 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
909 | if (!res) | |
910 | return -ENOMEM; | |
911 | ||
912 | amd_manager->acp_mmio = devm_ioremap(dev, res->start, resource_size(res)); | |
913 | if (IS_ERR(amd_manager->mmio)) { | |
914 | dev_err(dev, "mmio not found\n"); | |
915 | return PTR_ERR(amd_manager->mmio); | |
916 | } | |
917 | amd_manager->instance = pdata->instance; | |
918 | amd_manager->mmio = amd_manager->acp_mmio + | |
919 | (amd_manager->instance * SDW_MANAGER_REG_OFFSET); | |
920 | amd_manager->acp_sdw_lock = pdata->acp_sdw_lock; | |
921 | amd_manager->cols_index = sdw_find_col_index(AMD_SDW_DEFAULT_COLUMNS); | |
922 | amd_manager->rows_index = sdw_find_row_index(AMD_SDW_DEFAULT_ROWS); | |
923 | amd_manager->dev = dev; | |
924 | amd_manager->bus.ops = &amd_sdw_ops; | |
925 | amd_manager->bus.port_ops = &amd_sdw_port_ops; | |
926 | amd_manager->bus.compute_params = &amd_sdw_compute_params; | |
927 | amd_manager->bus.clk_stop_timeout = 200; | |
928 | amd_manager->bus.link_id = amd_manager->instance; | |
929 | ||
930 | switch (amd_manager->instance) { | |
931 | case ACP_SDW0: | |
932 | amd_manager->num_dout_ports = AMD_SDW0_MAX_TX_PORTS; | |
933 | amd_manager->num_din_ports = AMD_SDW0_MAX_RX_PORTS; | |
934 | break; | |
935 | case ACP_SDW1: | |
936 | amd_manager->num_dout_ports = AMD_SDW1_MAX_TX_PORTS; | |
937 | amd_manager->num_din_ports = AMD_SDW1_MAX_RX_PORTS; | |
938 | break; | |
939 | default: | |
940 | return -EINVAL; | |
941 | } | |
942 | ||
943 | amd_manager->reg_mask = &sdw_manager_reg_mask_array[amd_manager->instance]; | |
944 | params = &amd_manager->bus.params; | |
945 | params->max_dr_freq = AMD_SDW_DEFAULT_CLK_FREQ * 2; | |
946 | params->curr_dr_freq = AMD_SDW_DEFAULT_CLK_FREQ * 2; | |
947 | params->col = AMD_SDW_DEFAULT_COLUMNS; | |
948 | params->row = AMD_SDW_DEFAULT_ROWS; | |
949 | prop = &amd_manager->bus.prop; | |
950 | prop->clk_freq = &amd_sdw_freq_tbl[0]; | |
951 | prop->mclk_freq = AMD_SDW_BUS_BASE_FREQ; | |
952 | ||
953 | ret = sdw_bus_master_add(&amd_manager->bus, dev, dev->fwnode); | |
954 | if (ret) { | |
955 | dev_err(dev, "Failed to register SoundWire manager(%d)\n", ret); | |
956 | return ret; | |
957 | } | |
2b13596f VM |
958 | ret = amd_sdw_register_dais(amd_manager); |
959 | if (ret) { | |
960 | dev_err(dev, "CPU DAI registration failed\n"); | |
961 | sdw_bus_master_delete(&amd_manager->bus); | |
962 | return ret; | |
963 | } | |
d8f48fbd | 964 | dev_set_drvdata(dev, amd_manager); |
65f93e40 VM |
965 | INIT_WORK(&amd_manager->amd_sdw_irq_thread, amd_sdw_irq_thread); |
966 | INIT_WORK(&amd_manager->amd_sdw_work, amd_sdw_update_slave_status_work); | |
d8f48fbd VM |
967 | INIT_WORK(&amd_manager->probe_work, amd_sdw_probe_work); |
968 | /* | |
969 | * Instead of having lengthy probe sequence, use deferred probe. | |
970 | */ | |
971 | schedule_work(&amd_manager->probe_work); | |
972 | return 0; | |
973 | } | |
974 | ||
975 | static int amd_sdw_manager_remove(struct platform_device *pdev) | |
976 | { | |
977 | struct amd_sdw_manager *amd_manager = dev_get_drvdata(&pdev->dev); | |
978 | ||
81ff58ff | 979 | pm_runtime_disable(&pdev->dev); |
d8f48fbd VM |
980 | cancel_work_sync(&amd_manager->probe_work); |
981 | amd_disable_sdw_interrupts(amd_manager); | |
982 | sdw_bus_master_delete(&amd_manager->bus); | |
983 | return amd_disable_sdw_manager(amd_manager); | |
984 | } | |
985 | ||
81ff58ff VM |
986 | static int amd_sdw_clock_stop(struct amd_sdw_manager *amd_manager) |
987 | { | |
988 | u32 val; | |
989 | int ret; | |
990 | ||
991 | ret = sdw_bus_prep_clk_stop(&amd_manager->bus); | |
992 | if (ret < 0 && ret != -ENODATA) { | |
993 | dev_err(amd_manager->dev, "prepare clock stop failed %d", ret); | |
994 | return 0; | |
995 | } | |
996 | ret = sdw_bus_clk_stop(&amd_manager->bus); | |
997 | if (ret < 0 && ret != -ENODATA) { | |
998 | dev_err(amd_manager->dev, "bus clock stop failed %d", ret); | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val, | |
1003 | (val & AMD_SDW_CLK_STOP_DONE), ACP_DELAY_US, AMD_SDW_TIMEOUT); | |
1004 | if (ret) { | |
1005 | dev_err(amd_manager->dev, "SDW%x clock stop failed\n", amd_manager->instance); | |
1006 | return 0; | |
1007 | } | |
1008 | ||
1009 | amd_manager->clk_stopped = true; | |
1010 | if (amd_manager->wake_en_mask) | |
1011 | writel(0x01, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance)); | |
1012 | ||
1013 | dev_dbg(amd_manager->dev, "SDW%x clock stop successful\n", amd_manager->instance); | |
1014 | return 0; | |
1015 | } | |
1016 | ||
1017 | static int amd_sdw_clock_stop_exit(struct amd_sdw_manager *amd_manager) | |
1018 | { | |
1019 | int ret; | |
1020 | u32 val; | |
1021 | ||
1022 | if (amd_manager->clk_stopped) { | |
1023 | val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1024 | val |= AMD_SDW_CLK_RESUME_REQ; | |
1025 | writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1026 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val, | |
1027 | (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US, | |
1028 | AMD_SDW_TIMEOUT); | |
1029 | if (val & AMD_SDW_CLK_RESUME_DONE) { | |
1030 | writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1031 | ret = sdw_bus_exit_clk_stop(&amd_manager->bus); | |
1032 | if (ret < 0) | |
1033 | dev_err(amd_manager->dev, "bus failed to exit clock stop %d\n", | |
1034 | ret); | |
1035 | amd_manager->clk_stopped = false; | |
1036 | } | |
1037 | } | |
1038 | if (amd_manager->clk_stopped) { | |
1039 | dev_err(amd_manager->dev, "SDW%x clock stop exit failed\n", amd_manager->instance); | |
1040 | return 0; | |
1041 | } | |
1042 | dev_dbg(amd_manager->dev, "SDW%x clock stop exit successful\n", amd_manager->instance); | |
1043 | return 0; | |
1044 | } | |
1045 | ||
9cf1efc5 VM |
1046 | static int amd_resume_child_device(struct device *dev, void *data) |
1047 | { | |
1048 | struct sdw_slave *slave = dev_to_sdw_dev(dev); | |
1049 | int ret; | |
1050 | ||
1051 | if (!slave->probed) { | |
1052 | dev_dbg(dev, "skipping device, no probed driver\n"); | |
1053 | return 0; | |
1054 | } | |
1055 | if (!slave->dev_num_sticky) { | |
1056 | dev_dbg(dev, "skipping device, never detected on bus\n"); | |
1057 | return 0; | |
1058 | } | |
1059 | ret = pm_request_resume(dev); | |
1060 | if (ret < 0) { | |
1061 | dev_err(dev, "pm_request_resume failed: %d\n", ret); | |
1062 | return ret; | |
1063 | } | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | static int __maybe_unused amd_pm_prepare(struct device *dev) | |
1068 | { | |
1069 | struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); | |
1070 | struct sdw_bus *bus = &amd_manager->bus; | |
1071 | int ret; | |
1072 | ||
1073 | if (bus->prop.hw_disabled) { | |
1074 | dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n", | |
1075 | bus->link_id); | |
1076 | return 0; | |
1077 | } | |
1078 | /* | |
1079 | * When multiple peripheral devices connected over the same link, if SoundWire manager | |
1080 | * device is not in runtime suspend state, observed that device alerts are missing | |
1081 | * without pm_prepare on AMD platforms in clockstop mode0. | |
1082 | */ | |
1083 | if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { | |
1084 | ret = pm_request_resume(dev); | |
1085 | if (ret < 0) { | |
1086 | dev_err(bus->dev, "pm_request_resume failed: %d\n", ret); | |
1087 | return 0; | |
1088 | } | |
1089 | } | |
1090 | /* To force peripheral devices to system level suspend state, resume the devices | |
1091 | * from runtime suspend state first. Without that unable to dispatch the alert | |
1092 | * status to peripheral driver during system level resume as they are in runtime | |
1093 | * suspend state. | |
1094 | */ | |
1095 | ret = device_for_each_child(bus->dev, NULL, amd_resume_child_device); | |
1096 | if (ret < 0) | |
1097 | dev_err(dev, "amd_resume_child_device failed: %d\n", ret); | |
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static int __maybe_unused amd_suspend(struct device *dev) | |
1102 | { | |
1103 | struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); | |
1104 | struct sdw_bus *bus = &amd_manager->bus; | |
1105 | int ret; | |
1106 | ||
1107 | if (bus->prop.hw_disabled) { | |
1108 | dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n", | |
1109 | bus->link_id); | |
1110 | return 0; | |
1111 | } | |
1112 | ||
1113 | if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { | |
1114 | return amd_sdw_clock_stop(amd_manager); | |
1115 | } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) { | |
1116 | /* | |
1117 | * As per hardware programming sequence on AMD platforms, | |
1118 | * clock stop should be invoked first before powering-off | |
1119 | */ | |
1120 | ret = amd_sdw_clock_stop(amd_manager); | |
1121 | if (ret) | |
1122 | return ret; | |
1123 | return amd_deinit_sdw_manager(amd_manager); | |
1124 | } | |
1125 | return 0; | |
1126 | } | |
1127 | ||
81ff58ff VM |
1128 | static int __maybe_unused amd_suspend_runtime(struct device *dev) |
1129 | { | |
1130 | struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); | |
1131 | struct sdw_bus *bus = &amd_manager->bus; | |
1132 | int ret; | |
1133 | ||
1134 | if (bus->prop.hw_disabled) { | |
1135 | dev_dbg(bus->dev, "SoundWire manager %d is disabled,\n", | |
1136 | bus->link_id); | |
1137 | return 0; | |
1138 | } | |
1139 | if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { | |
1140 | return amd_sdw_clock_stop(amd_manager); | |
1141 | } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) { | |
1142 | ret = amd_sdw_clock_stop(amd_manager); | |
1143 | if (ret) | |
1144 | return ret; | |
1145 | return amd_deinit_sdw_manager(amd_manager); | |
1146 | } | |
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | static int __maybe_unused amd_resume_runtime(struct device *dev) | |
1151 | { | |
1152 | struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev); | |
1153 | struct sdw_bus *bus = &amd_manager->bus; | |
1154 | int ret; | |
1155 | u32 val; | |
1156 | ||
1157 | if (bus->prop.hw_disabled) { | |
1158 | dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n", | |
1159 | bus->link_id); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
1163 | if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) { | |
1164 | return amd_sdw_clock_stop_exit(amd_manager); | |
1165 | } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) { | |
1166 | val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1167 | if (val) { | |
1168 | val |= AMD_SDW_CLK_RESUME_REQ; | |
1169 | writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1170 | ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val, | |
1171 | (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US, | |
1172 | AMD_SDW_TIMEOUT); | |
1173 | if (val & AMD_SDW_CLK_RESUME_DONE) { | |
1174 | writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL); | |
1175 | amd_manager->clk_stopped = false; | |
1176 | } | |
1177 | } | |
1178 | sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET); | |
1179 | amd_init_sdw_manager(amd_manager); | |
1180 | amd_enable_sdw_interrupts(amd_manager); | |
1181 | ret = amd_enable_sdw_manager(amd_manager); | |
1182 | if (ret) | |
1183 | return ret; | |
1184 | amd_sdw_set_frameshape(amd_manager); | |
1185 | } | |
1186 | return 0; | |
1187 | } | |
1188 | ||
1189 | static const struct dev_pm_ops amd_pm = { | |
9cf1efc5 VM |
1190 | .prepare = amd_pm_prepare, |
1191 | SET_SYSTEM_SLEEP_PM_OPS(amd_suspend, amd_resume_runtime) | |
81ff58ff VM |
1192 | SET_RUNTIME_PM_OPS(amd_suspend_runtime, amd_resume_runtime, NULL) |
1193 | }; | |
1194 | ||
d8f48fbd VM |
1195 | static struct platform_driver amd_sdw_driver = { |
1196 | .probe = &amd_sdw_manager_probe, | |
1197 | .remove = &amd_sdw_manager_remove, | |
1198 | .driver = { | |
1199 | .name = "amd_sdw_manager", | |
81ff58ff | 1200 | .pm = &amd_pm, |
d8f48fbd VM |
1201 | } |
1202 | }; | |
1203 | module_platform_driver(amd_sdw_driver); | |
1204 | ||
1205 | MODULE_AUTHOR("Vijendar.Mukunda@amd.com"); | |
1206 | MODULE_DESCRIPTION("AMD SoundWire driver"); | |
1207 | MODULE_LICENSE("GPL"); | |
1208 | MODULE_ALIAS("platform:" DRV_NAME); |