2 * Intel Smart Sound Technology (SST) DSP Core Driver
4 * Copyright (C) 2013, Intel Corporation. All rights reserved.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License version
8 * 2 as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
17 #include <linux/slab.h>
18 #include <linux/export.h>
19 #include <linux/interrupt.h>
20 #include <linux/module.h>
21 #include <linux/platform_device.h>
25 #include "sst-dsp-priv.h"
27 #define CREATE_TRACE_POINTS
28 #include <trace/events/intel-sst.h>
31 void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
35 spin_lock_irqsave(&sst->spinlock, flags);
36 sst->ops->write(sst->addr.shim, offset, value);
37 spin_unlock_irqrestore(&sst->spinlock, flags);
39 EXPORT_SYMBOL_GPL(sst_dsp_shim_write);
41 u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
46 spin_lock_irqsave(&sst->spinlock, flags);
47 val = sst->ops->read(sst->addr.shim, offset);
48 spin_unlock_irqrestore(&sst->spinlock, flags);
52 EXPORT_SYMBOL_GPL(sst_dsp_shim_read);
54 void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
58 spin_lock_irqsave(&sst->spinlock, flags);
59 sst->ops->write64(sst->addr.shim, offset, value);
60 spin_unlock_irqrestore(&sst->spinlock, flags);
62 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);
64 u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
69 spin_lock_irqsave(&sst->spinlock, flags);
70 val = sst->ops->read64(sst->addr.shim, offset);
71 spin_unlock_irqrestore(&sst->spinlock, flags);
75 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);
77 void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
79 sst->ops->write(sst->addr.shim, offset, value);
81 EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);
83 u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
85 return sst->ops->read(sst->addr.shim, offset);
87 EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);
89 void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
91 sst->ops->write64(sst->addr.shim, offset, value);
93 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);
95 u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
97 return sst->ops->read64(sst->addr.shim, offset);
99 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);
101 int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
105 unsigned int old, new;
108 ret = sst_dsp_shim_read_unlocked(sst, offset);
111 new = (old & (~mask)) | (value & mask);
113 change = (old != new);
115 sst_dsp_shim_write_unlocked(sst, offset, new);
119 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);
121 int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
127 old = sst_dsp_shim_read64_unlocked(sst, offset);
129 new = (old & (~mask)) | (value & mask);
131 change = (old != new);
133 sst_dsp_shim_write64_unlocked(sst, offset, new);
137 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);
139 int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
145 spin_lock_irqsave(&sst->spinlock, flags);
146 change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
147 spin_unlock_irqrestore(&sst->spinlock, flags);
150 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);
152 int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
158 spin_lock_irqsave(&sst->spinlock, flags);
159 change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
160 spin_unlock_irqrestore(&sst->spinlock, flags);
163 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);
165 void sst_dsp_dump(struct sst_dsp *sst)
169 EXPORT_SYMBOL_GPL(sst_dsp_dump);
171 void sst_dsp_reset(struct sst_dsp *sst)
173 sst->ops->reset(sst);
175 EXPORT_SYMBOL_GPL(sst_dsp_reset);
177 int sst_dsp_boot(struct sst_dsp *sst)
182 EXPORT_SYMBOL_GPL(sst_dsp_boot);
184 void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
186 sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg | SST_IPCX_BUSY);
187 trace_sst_ipc_msg_tx(msg);
189 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);
191 u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
195 msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
196 trace_sst_ipc_msg_rx(msg);
200 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);
202 int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
203 u32 outbox_offset, size_t outbox_size)
205 sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
206 sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
207 sst->mailbox.in_size = inbox_size;
208 sst->mailbox.out_size = outbox_size;
211 EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);
213 void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
217 trace_sst_ipc_outbox_write(bytes);
219 memcpy_toio(sst->mailbox.out_base, message, bytes);
221 for (i = 0; i < bytes; i += 4)
222 trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
224 EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);
226 void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
230 trace_sst_ipc_outbox_read(bytes);
232 memcpy_fromio(message, sst->mailbox.out_base, bytes);
234 for (i = 0; i < bytes; i += 4)
235 trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
237 EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);
239 void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
243 trace_sst_ipc_inbox_write(bytes);
245 memcpy_toio(sst->mailbox.in_base, message, bytes);
247 for (i = 0; i < bytes; i += 4)
248 trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
250 EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);
252 void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
256 trace_sst_ipc_inbox_read(bytes);
258 memcpy_fromio(message, sst->mailbox.in_base, bytes);
260 for (i = 0; i < bytes; i += 4)
261 trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
263 EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);
265 struct sst_dsp *sst_dsp_new(struct device *dev,
266 struct sst_dsp_device *sst_dev, struct sst_pdata *pdata)
271 dev_dbg(dev, "initialising audio DSP id 0x%x\n", pdata->id);
273 sst = devm_kzalloc(dev, sizeof(*sst), GFP_KERNEL);
277 spin_lock_init(&sst->spinlock);
278 mutex_init(&sst->mutex);
280 sst->thread_context = sst_dev->thread_context;
281 sst->sst_dev = sst_dev;
283 sst->irq = pdata->irq;
284 sst->ops = sst_dev->ops;
286 INIT_LIST_HEAD(&sst->used_block_list);
287 INIT_LIST_HEAD(&sst->free_block_list);
288 INIT_LIST_HEAD(&sst->module_list);
289 INIT_LIST_HEAD(&sst->fw_list);
291 /* Initialise SST Audio DSP */
292 if (sst->ops->init) {
293 err = sst->ops->init(sst, pdata);
298 /* Register the ISR */
299 err = request_threaded_irq(sst->irq, sst->ops->irq_handler,
300 sst_dev->thread, IRQF_SHARED, "AudioDSP", sst);
312 EXPORT_SYMBOL_GPL(sst_dsp_new);
314 void sst_dsp_free(struct sst_dsp *sst)
316 free_irq(sst->irq, sst);
320 EXPORT_SYMBOL_GPL(sst_dsp_free);
322 /* Module information */
323 MODULE_AUTHOR("Liam Girdwood");
324 MODULE_DESCRIPTION("Intel SST Core");
325 MODULE_LICENSE("GPL v2");