1 // SPDX-License-Identifier: GPL-2.0-only
3  * HD-audio controller helpers
19 	for (timeout = 1000; timeout > 0; timeout--) {  in azx_clear_corbrp()
25 		dev_err(bus->dev, "CORB reset timeout#1, CORBRP = %d\n",  in azx_clear_corbrp()
29 	for (timeout = 1000; timeout > 0; timeout--) {  in azx_clear_corbrp()
35 		dev_err(bus->dev, "CORB reset timeout#2, CORBRP = %d\n",  in azx_clear_corbrp()
40  * snd_hdac_bus_init_cmd_io - set up CORB/RIRB buffers
41  * @bus: HD-audio core bus
45 	WARN_ON_ONCE(!bus->rb.area);  in snd_hdac_bus_init_cmd_io()
47 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_init_cmd_io()
49 	bus->corb.addr = bus->rb.addr;  in snd_hdac_bus_init_cmd_io()
50 	bus->corb.buf = (__le32 *)bus->rb.area;  in snd_hdac_bus_init_cmd_io()
51 	snd_hdac_chip_writel(bus, CORBLBASE, (u32)bus->corb.addr);  in snd_hdac_bus_init_cmd_io()
52 	snd_hdac_chip_writel(bus, CORBUBASE, upper_32_bits(bus->corb.addr));  in snd_hdac_bus_init_cmd_io()
59 	/* reset the corb hw read pointer */  in snd_hdac_bus_init_cmd_io()
61 	if (!bus->corbrp_self_clear)  in snd_hdac_bus_init_cmd_io()
65 	if (!bus->use_pio_for_commands)  in snd_hdac_bus_init_cmd_io()
69 	bus->rirb.addr = bus->rb.addr + 2048;  in snd_hdac_bus_init_cmd_io()
70 	bus->rirb.buf = (__le32 *)(bus->rb.area + 2048);  in snd_hdac_bus_init_cmd_io()
71 	bus->rirb.wp = bus->rirb.rp = 0;  in snd_hdac_bus_init_cmd_io()
72 	memset(bus->rirb.cmds, 0, sizeof(bus->rirb.cmds));  in snd_hdac_bus_init_cmd_io()
73 	snd_hdac_chip_writel(bus, RIRBLBASE, (u32)bus->rirb.addr);  in snd_hdac_bus_init_cmd_io()
74 	snd_hdac_chip_writel(bus, RIRBUBASE, upper_32_bits(bus->rirb.addr));  in snd_hdac_bus_init_cmd_io()
78 	/* reset the rirb hw write pointer */  in snd_hdac_bus_init_cmd_io()
83 	if (bus->not_use_interrupts)  in snd_hdac_bus_init_cmd_io()
89 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_init_cmd_io()
110  * snd_hdac_bus_stop_cmd_io - clean up CORB/RIRB buffers
111  * @bus: HD-audio core bus
115 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_stop_cmd_io()
119 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_stop_cmd_io()
123 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_stop_cmd_io()
126 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_stop_cmd_io()
145 	while (timeout--) {  in snd_hdac_bus_wait_for_pio_response()
149 			bus->rirb.res[addr] = snd_hdac_chip_readl(bus, IR);  in snd_hdac_bus_wait_for_pio_response()
155 	dev_dbg_ratelimited(bus->dev, "get_response_pio timeout: IRS=%#x\n",  in snd_hdac_bus_wait_for_pio_response()
158 	bus->rirb.res[addr] = -1;  in snd_hdac_bus_wait_for_pio_response()
160 	return -EIO;  in snd_hdac_bus_wait_for_pio_response()
164  * snd_hdac_bus_send_cmd_pio - send a command verb via Immediate Command
165  * @bus: HD-audio core bus
174 	int ret = -EIO;  in snd_hdac_bus_send_cmd_pio()
176 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_pio()
178 	while (timeout--) {  in snd_hdac_bus_send_cmd_pio()
193 	dev_dbg_ratelimited(bus->dev, "send_cmd_pio timeout: IRS=%#x, val=%#x\n",  in snd_hdac_bus_send_cmd_pio()
197 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_pio()
203  * snd_hdac_bus_get_response_pio - receive a response via Immediate Response
204  * @bus: HD-audio core bus
205  * @addr: codec address
214 		*res = bus->rirb.res[addr];  in snd_hdac_bus_get_response_pio()
220  * snd_hdac_bus_send_cmd_corb - send a command verb via CORB
221  * @bus: HD-audio core bus
231 	spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_corb()
233 	bus->last_cmd[azx_command_addr(val)] = val;  in snd_hdac_bus_send_cmd_corb()
239 		spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_corb()
240 		return -EIO;  in snd_hdac_bus_send_cmd_corb()
248 		spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_corb()
249 		return -EAGAIN;  in snd_hdac_bus_send_cmd_corb()
252 	bus->rirb.cmds[addr]++;  in snd_hdac_bus_send_cmd_corb()
253 	bus->corb.buf[wp] = cpu_to_le32(val);  in snd_hdac_bus_send_cmd_corb()
256 	spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_send_cmd_corb()
264  * snd_hdac_bus_update_rirb - retrieve RIRB entries
265  * @bus: HD-audio core bus
268  * The caller needs bus->reg_lock spinlock before calling this.
282 	if (wp == bus->rirb.wp)  in snd_hdac_bus_update_rirb()
284 	bus->rirb.wp = wp;  in snd_hdac_bus_update_rirb()
286 	while (bus->rirb.rp != wp) {  in snd_hdac_bus_update_rirb()
287 		bus->rirb.rp++;  in snd_hdac_bus_update_rirb()
288 		bus->rirb.rp %= AZX_MAX_RIRB_ENTRIES;  in snd_hdac_bus_update_rirb()
290 		rp = bus->rirb.rp << 1; /* an RIRB entry is 8-bytes */  in snd_hdac_bus_update_rirb()
291 		res_ex = le32_to_cpu(bus->rirb.buf[rp + 1]);  in snd_hdac_bus_update_rirb()
292 		res = le32_to_cpu(bus->rirb.buf[rp]);  in snd_hdac_bus_update_rirb()
295 			dev_err(bus->dev,  in snd_hdac_bus_update_rirb()
297 				res, res_ex, bus->rirb.rp, wp);  in snd_hdac_bus_update_rirb()
301 		else if (bus->rirb.cmds[addr]) {  in snd_hdac_bus_update_rirb()
302 			bus->rirb.res[addr] = res;  in snd_hdac_bus_update_rirb()
303 			bus->rirb.cmds[addr]--;  in snd_hdac_bus_update_rirb()
304 			if (!bus->rirb.cmds[addr] &&  in snd_hdac_bus_update_rirb()
305 			    waitqueue_active(&bus->rirb_wq))  in snd_hdac_bus_update_rirb()
306 				wake_up(&bus->rirb_wq);  in snd_hdac_bus_update_rirb()
308 			dev_err_ratelimited(bus->dev,  in snd_hdac_bus_update_rirb()
310 				res, res_ex, bus->last_cmd[addr]);  in snd_hdac_bus_update_rirb()
317  * snd_hdac_bus_get_response_rirb - receive a response via RIRB
318  * @bus: HD-audio core bus
319  * @addr: codec address
336 		spin_lock_irq(&bus->reg_lock);  in snd_hdac_bus_get_response_rirb()
337 		if (!bus->polling_mode)  in snd_hdac_bus_get_response_rirb()
338 			prepare_to_wait(&bus->rirb_wq, &wait,  in snd_hdac_bus_get_response_rirb()
340 		if (bus->polling_mode)  in snd_hdac_bus_get_response_rirb()
342 		if (!bus->rirb.cmds[addr]) {  in snd_hdac_bus_get_response_rirb()
344 				*res = bus->rirb.res[addr]; /* the last value */  in snd_hdac_bus_get_response_rirb()
345 			if (!bus->polling_mode)  in snd_hdac_bus_get_response_rirb()
346 				finish_wait(&bus->rirb_wq, &wait);  in snd_hdac_bus_get_response_rirb()
347 			spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_get_response_rirb()
350 		spin_unlock_irq(&bus->reg_lock);  in snd_hdac_bus_get_response_rirb()
354 		if (!bus->polling_mode) {  in snd_hdac_bus_get_response_rirb()
356 		} else if (bus->needs_damn_long_delay ||  in snd_hdac_bus_get_response_rirb()
359 				dev_dbg_ratelimited(bus->dev,  in snd_hdac_bus_get_response_rirb()
361 						    bus->last_cmd[addr]);  in snd_hdac_bus_get_response_rirb()
371 	if (!bus->polling_mode)  in snd_hdac_bus_get_response_rirb()
372 		finish_wait(&bus->rirb_wq, &wait);  in snd_hdac_bus_get_response_rirb()
374 	return -EIO;  in snd_hdac_bus_get_response_rirb()
378  * snd_hdac_bus_send_cmd - send a command verb via CORB or PIO
379  * @bus: HD-audio core bus
386 	if (bus->use_pio_for_commands)  in snd_hdac_bus_send_cmd()
394  * snd_hdac_bus_get_response - receive a response via RIRB or PIO
395  * @bus: HD-audio core bus
396  * @addr: codec address
404 	if (bus->use_pio_for_commands)  in snd_hdac_bus_get_response()
413  * snd_hdac_bus_parse_capabilities - parse capability structure
430 		dev_dbg(bus->dev, "Capability version: 0x%x\n",  in snd_hdac_bus_parse_capabilities()
433 		dev_dbg(bus->dev, "HDA capability ID: 0x%x\n",  in snd_hdac_bus_parse_capabilities()
436 		if (cur_cap == -1) {  in snd_hdac_bus_parse_capabilities()
437 			dev_dbg(bus->dev, "Invalid capability reg read\n");  in snd_hdac_bus_parse_capabilities()
443 			dev_dbg(bus->dev, "Found ML capability\n");  in snd_hdac_bus_parse_capabilities()
444 			bus->mlcap = bus->remap_addr + offset;  in snd_hdac_bus_parse_capabilities()
448 			dev_dbg(bus->dev, "Found GTS capability offset=%x\n", offset);  in snd_hdac_bus_parse_capabilities()
449 			bus->gtscap = bus->remap_addr + offset;  in snd_hdac_bus_parse_capabilities()
454 			dev_dbg(bus->dev, "Found PP capability offset=%x\n", offset);  in snd_hdac_bus_parse_capabilities()
455 			bus->ppcap = bus->remap_addr + offset;  in snd_hdac_bus_parse_capabilities()
460 			dev_dbg(bus->dev, "Found SPB capability\n");  in snd_hdac_bus_parse_capabilities()
461 			bus->spbcap = bus->remap_addr + offset;  in snd_hdac_bus_parse_capabilities()
466 			dev_dbg(bus->dev, "Found DRSM capability\n");  in snd_hdac_bus_parse_capabilities()
467 			bus->drsmcap = bus->remap_addr + offset;  in snd_hdac_bus_parse_capabilities()
471 			dev_err(bus->dev, "Unknown capability %d\n", cur_cap);  in snd_hdac_bus_parse_capabilities()
479 			dev_err(bus->dev, "We exceeded HDAC capabilities!!!\n");  in snd_hdac_bus_parse_capabilities()
497  * snd_hdac_bus_enter_link_reset - enter link reset
498  * @bus: HD-audio core bus
500  * Enter to the link reset state.
506 	/* reset controller */  in snd_hdac_bus_enter_link_reset()
517  * snd_hdac_bus_exit_link_reset - exit link reset
518  * @bus: HD-audio core bus
520  * Exit from the link reset state.
534 /* reset codec link */
540 	/* clear STATESTS if not in reset */  in snd_hdac_bus_reset_link()
544 	/* reset controller */  in snd_hdac_bus_reset_link()
547 	/* delay for >= 100us for codec PLL to settle per spec  in snd_hdac_bus_reset_link()
552 	/* Bring controller out of reset */  in snd_hdac_bus_reset_link()
561 		dev_dbg(bus->dev, "controller not ready!\n");  in snd_hdac_bus_reset_link()
562 		return -EBUSY;  in snd_hdac_bus_reset_link()
566 	if (!bus->codec_mask) {  in snd_hdac_bus_reset_link()
567 		bus->codec_mask = snd_hdac_chip_readw(bus, STATESTS);  in snd_hdac_bus_reset_link()
568 		dev_dbg(bus->dev, "codec_mask = 0x%lx\n", bus->codec_mask);  in snd_hdac_bus_reset_link()
590 	list_for_each_entry(azx_dev, &bus->stream_list, list)  in azx_int_disable()
603 	list_for_each_entry(azx_dev, &bus->stream_list, list)  in azx_int_clear()
617  * snd_hdac_bus_init_chip - reset and start the controller registers
618  * @bus: HD-audio core bus
619  * @full_reset: Do full reset
623 	if (bus->chip_init)  in snd_hdac_bus_init_chip()
626 	/* reset controller */  in snd_hdac_bus_init_chip()
632 	/* initialize the codec command I/O */  in snd_hdac_bus_init_chip()
639 	if (bus->use_posbuf && bus->posbuf.addr) {  in snd_hdac_bus_init_chip()
640 		snd_hdac_chip_writel(bus, DPLBASE, (u32)bus->posbuf.addr);  in snd_hdac_bus_init_chip()
641 		snd_hdac_chip_writel(bus, DPUBASE, upper_32_bits(bus->posbuf.addr));  in snd_hdac_bus_init_chip()
644 	bus->chip_init = true;  in snd_hdac_bus_init_chip()
651  * snd_hdac_bus_stop_chip - disable the whole IRQ and I/Os
652  * @bus: HD-audio core bus
656 	if (!bus->chip_init)  in snd_hdac_bus_stop_chip()
667 	if (bus->posbuf.addr) {  in snd_hdac_bus_stop_chip()
672 	bus->chip_init = false;  in snd_hdac_bus_stop_chip()
677  * snd_hdac_bus_handle_stream_irq - interrupt handler for streams
678  * @bus: HD-audio core bus
692 	list_for_each_entry(azx_dev, &bus->stream_list, list) {  in snd_hdac_bus_handle_stream_irq()
693 		if (status & azx_dev->sd_int_sta_mask) {  in snd_hdac_bus_handle_stream_irq()
696 			handled |= 1 << azx_dev->index;  in snd_hdac_bus_handle_stream_irq()
697 			if ((!azx_dev->substream && !azx_dev->cstream) ||  in snd_hdac_bus_handle_stream_irq()
698 			    !azx_dev->running || !(sd_status & SD_INT_COMPLETE))  in snd_hdac_bus_handle_stream_irq()
709  * snd_hdac_bus_alloc_stream_pages - allocate BDL and other buffers
710  * @bus: HD-audio core bus
719 	int dma_type = bus->dma_type ? bus->dma_type : SNDRV_DMA_TYPE_DEV;  in snd_hdac_bus_alloc_stream_pages()
722 	list_for_each_entry(s, &bus->stream_list, list) {  in snd_hdac_bus_alloc_stream_pages()
724 		err = snd_dma_alloc_pages(dma_type, bus->dev,  in snd_hdac_bus_alloc_stream_pages()
725 					  BDL_SIZE, &s->bdl);  in snd_hdac_bus_alloc_stream_pages()
728 			return -ENOMEM;  in snd_hdac_bus_alloc_stream_pages()
732 		return -EINVAL;  in snd_hdac_bus_alloc_stream_pages()
734 	err = snd_dma_alloc_pages(dma_type, bus->dev,  in snd_hdac_bus_alloc_stream_pages()
735 				  num_streams * 8, &bus->posbuf);  in snd_hdac_bus_alloc_stream_pages()
737 		return -ENOMEM;  in snd_hdac_bus_alloc_stream_pages()
738 	list_for_each_entry(s, &bus->stream_list, list)  in snd_hdac_bus_alloc_stream_pages()
739 		s->posbuf = (__le32 *)(bus->posbuf.area + s->index * 8);  in snd_hdac_bus_alloc_stream_pages()
742 	return snd_dma_alloc_pages(dma_type, bus->dev, PAGE_SIZE, &bus->rb);  in snd_hdac_bus_alloc_stream_pages()
747  * snd_hdac_bus_free_stream_pages - release BDL and other buffers
748  * @bus: HD-audio core bus
754 	list_for_each_entry(s, &bus->stream_list, list) {  in snd_hdac_bus_free_stream_pages()
755 		if (s->bdl.area)  in snd_hdac_bus_free_stream_pages()
756 			snd_dma_free_pages(&s->bdl);  in snd_hdac_bus_free_stream_pages()
759 	if (bus->rb.area)  in snd_hdac_bus_free_stream_pages()
760 		snd_dma_free_pages(&bus->rb);  in snd_hdac_bus_free_stream_pages()
761 	if (bus->posbuf.area)  in snd_hdac_bus_free_stream_pages()
762 		snd_dma_free_pages(&bus->posbuf);  in snd_hdac_bus_free_stream_pages()
767  * snd_hdac_bus_link_power - power up/down codec link
768  * @codec: HD-audio device
769  * @enable: whether to power-up the link
771 void snd_hdac_bus_link_power(struct hdac_device *codec, bool enable)  in snd_hdac_bus_link_power()  argument
774 		set_bit(codec->addr, &codec->bus->codec_powered);  in snd_hdac_bus_link_power()
776 		clear_bit(codec->addr, &codec->bus->codec_powered);  in snd_hdac_bus_link_power()