1 // SPDX-License-Identifier: GPL-2.0
94 	int dir;  member
98 	struct mbox_controller mbox;  member
112 static struct cix_mbox_priv *to_cix_mbox_priv(struct mbox_controller *mbox)  in to_cix_mbox_priv()  argument
114 	return container_of(mbox, struct cix_mbox_priv, mbox);  in to_cix_mbox_priv()
119 	if (priv->use_shmem)  in cix_mbox_write()
120 		iowrite32(val, priv->base + offset - CIX_SHMEM_OFFSET);  in cix_mbox_write()
122 		iowrite32(val, priv->base + offset);  in cix_mbox_write()
127 	if (priv->use_shmem)  in cix_mbox_read()
128 		return ioread32(priv->base + offset - CIX_SHMEM_OFFSET);  in cix_mbox_read()
130 		return ioread32(priv->base + offset);  in cix_mbox_read()
135 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in mbox_fifo_empty()
154 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_send_data_db()
164 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_send_data_reg()
169 		return -EINVAL;  in cix_mbox_send_data_reg()
173 		cix_mbox_write(priv, msg->buf[i], CIX_REG_MSG(i));  in cix_mbox_send_data_reg()
183 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_send_data_fifo()
188 		return -EINVAL;  in cix_mbox_send_data_fifo()
193 		cix_mbox_write(priv, msg->buf[i], CIX_FIFO_WR);  in cix_mbox_send_data_fifo()
205 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_send_data_fast()
206 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_send_data_fast()
208 	int index = cp->index;  in cix_mbox_send_data_fast()
211 		return -EINVAL;  in cix_mbox_send_data_fast()
214 		dev_err(priv->dev, "Invalid Mbox index %d\n", index);  in cix_mbox_send_data_fast()
215 		return -EINVAL;  in cix_mbox_send_data_fast()
225 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_send_data()
226 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_send_data()
228 	if (priv->dir != CIX_MBOX_TX) {  in cix_mbox_send_data()
229 		dev_err(priv->dev, "Invalid Mbox dir %d\n", priv->dir);  in cix_mbox_send_data()
230 		return -EINVAL;  in cix_mbox_send_data()
233 	switch (cp->type) {  in cix_mbox_send_data()
247 		dev_err(priv->dev, "Invalid channel type: %d\n", cp->type);  in cix_mbox_send_data()
248 		return -EINVAL;  in cix_mbox_send_data()
255 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_isr_db()
260 	if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_isr_db()
279 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_isr_reg()
284 	if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_isr_reg()
310 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_isr_fifo()
315 	if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_isr_fifo()
331 			dev_err(priv->dev, "fifo underflow: int_stats %d\n", status);  in cix_mbox_isr_fifo()
349 			dev_err(priv->dev, "fifo overlow: int_stats %d\n", status);  in cix_mbox_isr_fifo()
357 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_isr_fast()
358 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_isr_fast()
361 	/* no irq will be trigger for TX dir mbox */  in cix_mbox_isr_fast()
362 	if (priv->dir != CIX_MBOX_RX)  in cix_mbox_isr_fast()
367 	if (int_status & CIX_FAST_CH_INT(cp->index)) {  in cix_mbox_isr_fast()
368 		cix_mbox_write(priv, CIX_FAST_CH_INT(cp->index), CIX_INT_CLEAR);  in cix_mbox_isr_fast()
369 		data = cix_mbox_read(priv, CIX_REG_F_INT(cp->index));  in cix_mbox_isr_fast()
377 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_isr()
378 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_isr()
380 	switch (cp->type) {  in cix_mbox_isr()
394 		dev_err(priv->dev, "Invalid channel type: %d\n", cp->type);  in cix_mbox_isr()
403 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_startup()
404 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_startup()
405 	int index = cp->index, ret;  in cix_mbox_startup()
408 	ret = request_irq(priv->irq, cix_mbox_isr, 0,  in cix_mbox_startup()
409 			  dev_name(priv->dev), chan);  in cix_mbox_startup()
411 		dev_err(priv->dev, "Unable to acquire IRQ %d\n", priv->irq);  in cix_mbox_startup()
415 	switch (cp->type) {  in cix_mbox_startup()
418 		chan->txdone_method = TXDONE_BY_ACK;  in cix_mbox_startup()
421 		if (priv->dir == CIX_MBOX_TX) {  in cix_mbox_startup()
438 		if (priv->dir == CIX_MBOX_TX) {  in cix_mbox_startup()
452 		if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_startup()
454 				dev_err(priv->dev, "Invalid index %d\n", index);  in cix_mbox_startup()
455 				ret = -EINVAL;  in cix_mbox_startup()
465 		dev_err(priv->dev, "Invalid channel type: %d\n", cp->type);  in cix_mbox_startup()
466 		ret = -EINVAL;  in cix_mbox_startup()
472 	free_irq(priv->irq, chan);  in cix_mbox_startup()
478 	struct cix_mbox_priv *priv = to_cix_mbox_priv(chan->mbox);  in cix_mbox_shutdown()
479 	struct cix_mbox_con_priv *cp = chan->con_priv;  in cix_mbox_shutdown()
480 	int index = cp->index;  in cix_mbox_shutdown()
483 	switch (cp->type) {  in cix_mbox_shutdown()
486 		if (priv->dir == CIX_MBOX_TX) {  in cix_mbox_shutdown()
491 		} else if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_shutdown()
499 		if (priv->dir == CIX_MBOX_TX) {  in cix_mbox_shutdown()
504 		} else if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_shutdown()
512 		if (priv->dir == CIX_MBOX_RX) {  in cix_mbox_shutdown()
514 				dev_err(priv->dev, "Invalid index %d\n", index);  in cix_mbox_shutdown()
525 		dev_err(priv->dev, "Invalid channel type: %d\n", cp->type);  in cix_mbox_shutdown()
529 	free_irq(priv->irq, chan);  in cix_mbox_shutdown()
544 		cp = &priv->con_priv[i];  in cix_mbox_init()
545 		cp->index = i;  in cix_mbox_init()
546 		cp->chan = &priv->mbox_chans[i];  in cix_mbox_init()
547 		priv->mbox_chans[i].con_priv = cp;  in cix_mbox_init()
548 		if (cp->index <= CIX_MBOX_FAST_IDX)  in cix_mbox_init()
549 			cp->type = CIX_MBOX_TYPE_FAST;  in cix_mbox_init()
550 		if (cp->index == CIX_MBOX_DB_IDX)  in cix_mbox_init()
551 			cp->type = CIX_MBOX_TYPE_DB;  in cix_mbox_init()
552 		if (cp->index == CIX_MBOX_FIFO_IDX)  in cix_mbox_init()
553 			cp->type = CIX_MBOX_TYPE_FIFO;  in cix_mbox_init()
554 		if (cp->index == CIX_MBOX_REG_IDX)  in cix_mbox_init()
555 			cp->type = CIX_MBOX_TYPE_REG;  in cix_mbox_init()
561 	struct device *dev = &pdev->dev;  in cix_mbox_probe()
569 		return -ENOMEM;  in cix_mbox_probe()
571 	priv->dev = dev;  in cix_mbox_probe()
572 	priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);  in cix_mbox_probe()
573 	if (IS_ERR(priv->base))  in cix_mbox_probe()
574 		return PTR_ERR(priv->base);  in cix_mbox_probe()
586 	priv->use_shmem = !!(res->start & CIX_SHMEM_OFFSET);  in cix_mbox_probe()
588 	priv->irq = platform_get_irq(pdev, 0);  in cix_mbox_probe()
589 	if (priv->irq < 0)  in cix_mbox_probe()
590 		return priv->irq;  in cix_mbox_probe()
592 	if (device_property_read_string(dev, "cix,mbox-dir", &dir_str)) {  in cix_mbox_probe()
593 		dev_err(priv->dev, "cix,mbox_dir property not found\n");  in cix_mbox_probe()
594 		return -EINVAL;  in cix_mbox_probe()
598 		priv->dir = 0;  in cix_mbox_probe()
600 		priv->dir = 1;  in cix_mbox_probe()
602 		dev_err(priv->dev, "cix,mbox_dir=%s is not expected\n", dir_str);  in cix_mbox_probe()
603 		return -EINVAL;  in cix_mbox_probe()
608 	priv->mbox.dev = dev;  in cix_mbox_probe()
609 	priv->mbox.ops = &cix_mbox_chan_ops;  in cix_mbox_probe()
610 	priv->mbox.chans = priv->mbox_chans;  in cix_mbox_probe()
611 	priv->mbox.txdone_irq = true;  in cix_mbox_probe()
612 	priv->mbox.num_chans = CIX_MBOX_CHANS;  in cix_mbox_probe()
613 	priv->mbox.of_xlate = NULL;  in cix_mbox_probe()
616 	ret = devm_mbox_controller_register(dev, &priv->mbox);  in cix_mbox_probe()
624 	{ .compatible = "cix,sky1-mbox" },