106 static u32 mbox_fifo_read(struct omap_mbox *mbox)  in mbox_fifo_read()  argument
108 	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;  in mbox_fifo_read()
110 	return mbox_read_reg(mbox->parent, fifo->msg);  in mbox_fifo_read()
113 static void mbox_fifo_write(struct omap_mbox *mbox, u32 msg)  in mbox_fifo_write()  argument
115 	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;  in mbox_fifo_write()
117 	mbox_write_reg(mbox->parent, msg, fifo->msg);  in mbox_fifo_write()
120 static int mbox_fifo_empty(struct omap_mbox *mbox)  in mbox_fifo_empty()  argument
122 	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;  in mbox_fifo_empty()
124 	return (mbox_read_reg(mbox->parent, fifo->msg_stat) == 0);  in mbox_fifo_empty()
127 static int mbox_fifo_full(struct omap_mbox *mbox)  in mbox_fifo_full()  argument
129 	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;  in mbox_fifo_full()
131 	return mbox_read_reg(mbox->parent, fifo->fifo_stat);  in mbox_fifo_full()
135 static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in ack_mbox_irq()  argument
138 				&mbox->tx_fifo : &mbox->rx_fifo;  in ack_mbox_irq()
142 	mbox_write_reg(mbox->parent, bit, irqstatus);  in ack_mbox_irq()
145 	mbox_read_reg(mbox->parent, irqstatus);  in ack_mbox_irq()
148 static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in is_mbox_irq()  argument
151 				&mbox->tx_fifo : &mbox->rx_fifo;  in is_mbox_irq()
156 	u32 enable = mbox_read_reg(mbox->parent, irqenable);  in is_mbox_irq()
157 	u32 status = mbox_read_reg(mbox->parent, irqstatus);  in is_mbox_irq()
162 static void omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in omap_mbox_enable_irq()  argument
166 				&mbox->tx_fifo : &mbox->rx_fifo;  in omap_mbox_enable_irq()
170 	l = mbox_read_reg(mbox->parent, irqenable);  in omap_mbox_enable_irq()
172 	mbox_write_reg(mbox->parent, l, irqenable);  in omap_mbox_enable_irq()
175 static void omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in omap_mbox_disable_irq()  argument
178 				&mbox->tx_fifo : &mbox->rx_fifo;  in omap_mbox_disable_irq()
186 	if (!mbox->intr_type)  in omap_mbox_disable_irq()
187 		bit = mbox_read_reg(mbox->parent, irqdisable) & ~bit;  in omap_mbox_disable_irq()
189 	mbox_write_reg(mbox->parent, bit, irqdisable);  in omap_mbox_disable_irq()
195 static void __mbox_tx_interrupt(struct omap_mbox *mbox)  in __mbox_tx_interrupt()  argument
197 	omap_mbox_disable_irq(mbox, IRQ_TX);  in __mbox_tx_interrupt()
198 	ack_mbox_irq(mbox, IRQ_TX);  in __mbox_tx_interrupt()
199 	mbox_chan_txdone(mbox->chan, 0);  in __mbox_tx_interrupt()
202 static void __mbox_rx_interrupt(struct omap_mbox *mbox)  in __mbox_rx_interrupt()  argument
206 	while (!mbox_fifo_empty(mbox)) {  in __mbox_rx_interrupt()
207 		msg = mbox_fifo_read(mbox);  in __mbox_rx_interrupt()
208 		mbox_chan_received_data(mbox->chan, (void *)(uintptr_t)msg);  in __mbox_rx_interrupt()
212 	ack_mbox_irq(mbox, IRQ_RX);  in __mbox_rx_interrupt()
217 	struct omap_mbox *mbox = p;  in mbox_interrupt()  local
219 	if (is_mbox_irq(mbox, IRQ_TX))  in mbox_interrupt()
220 		__mbox_tx_interrupt(mbox);  in mbox_interrupt()
222 	if (is_mbox_irq(mbox, IRQ_RX))  in mbox_interrupt()
223 		__mbox_rx_interrupt(mbox);  in mbox_interrupt()
228 static int omap_mbox_startup(struct omap_mbox *mbox)  in omap_mbox_startup()  argument
232 	ret = request_threaded_irq(mbox->irq, NULL, mbox_interrupt,  in omap_mbox_startup()
233 				   IRQF_SHARED | IRQF_ONESHOT, mbox->name,  in omap_mbox_startup()
234 				   mbox);  in omap_mbox_startup()
240 	if (mbox->send_no_irq)  in omap_mbox_startup()
241 		mbox->chan->txdone_method = TXDONE_BY_ACK;  in omap_mbox_startup()
243 	omap_mbox_enable_irq(mbox, IRQ_RX);  in omap_mbox_startup()
248 static void omap_mbox_fini(struct omap_mbox *mbox)  in omap_mbox_fini()  argument
250 	omap_mbox_disable_irq(mbox, IRQ_RX);  in omap_mbox_fini()
251 	free_irq(mbox->irq, mbox);  in omap_mbox_fini()
256 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_startup()  local
257 	struct omap_mbox_device *mdev = mbox->parent;  in omap_mbox_chan_startup()
262 	ret = omap_mbox_startup(mbox);  in omap_mbox_chan_startup()
271 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_shutdown()  local
272 	struct omap_mbox_device *mdev = mbox->parent;  in omap_mbox_chan_shutdown()
275 	omap_mbox_fini(mbox);  in omap_mbox_chan_shutdown()
280 static int omap_mbox_chan_send_noirq(struct omap_mbox *mbox, u32 msg)  in omap_mbox_chan_send_noirq()  argument
282 	if (mbox_fifo_full(mbox))  in omap_mbox_chan_send_noirq()
285 	omap_mbox_enable_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
286 	mbox_fifo_write(mbox, msg);  in omap_mbox_chan_send_noirq()
287 	omap_mbox_disable_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
290 	mbox_fifo_read(mbox);  in omap_mbox_chan_send_noirq()
291 	ack_mbox_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
296 static int omap_mbox_chan_send(struct omap_mbox *mbox, u32 msg)  in omap_mbox_chan_send()  argument
298 	if (mbox_fifo_full(mbox)) {  in omap_mbox_chan_send()
300 		omap_mbox_enable_irq(mbox, IRQ_TX);  in omap_mbox_chan_send()
304 	mbox_fifo_write(mbox, msg);  in omap_mbox_chan_send()
307 	omap_mbox_enable_irq(mbox, IRQ_TX);  in omap_mbox_chan_send()
313 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_send_data()  local
317 	if (!mbox)  in omap_mbox_chan_send_data()
320 	if (mbox->send_no_irq)  in omap_mbox_chan_send_data()
321 		ret = omap_mbox_chan_send_noirq(mbox, msg);  in omap_mbox_chan_send_data()
323 		ret = omap_mbox_chan_send(mbox, msg);  in omap_mbox_chan_send_data()
416 	struct omap_mbox *mbox;  in omap_mbox_of_xlate()  local
431 		mbox = controller->chans[i].con_priv;  in omap_mbox_of_xlate()
432 		if (!strcmp(mbox->name, node->name)) {  in omap_mbox_of_xlate()
446 	struct omap_mbox *mbox;  in omap_mbox_probe()  local
504 		mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL);  in omap_mbox_probe()
505 		if (!mbox)  in omap_mbox_probe()
529 		fifo = &mbox->tx_fifo;  in omap_mbox_probe()
537 		fifo = &mbox->rx_fifo;  in omap_mbox_probe()
545 		mbox->send_no_irq = of_property_read_bool(child, "ti,mbox-send-noirq");  in omap_mbox_probe()
546 		mbox->intr_type = intr_type;  in omap_mbox_probe()
548 		mbox->parent = mdev;  in omap_mbox_probe()
549 		mbox->name = child->name;  in omap_mbox_probe()
550 		mbox->irq = platform_get_irq(pdev, tx_irq);  in omap_mbox_probe()
551 		if (mbox->irq < 0)  in omap_mbox_probe()
552 			return mbox->irq;  in omap_mbox_probe()
553 		mbox->chan = &chnls[i];  in omap_mbox_probe()
554 		chnls[i].con_priv = mbox;  in omap_mbox_probe()