107 static u32 mbox_fifo_read(struct omap_mbox *mbox)  in mbox_fifo_read()  argument
109 	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;  in mbox_fifo_read()
111 	return mbox_read_reg(mbox->parent, fifo->msg);  in mbox_fifo_read()
114 static void mbox_fifo_write(struct omap_mbox *mbox, u32 msg)  in mbox_fifo_write()  argument
116 	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;  in mbox_fifo_write()
118 	mbox_write_reg(mbox->parent, msg, fifo->msg);  in mbox_fifo_write()
121 static int mbox_fifo_empty(struct omap_mbox *mbox)  in mbox_fifo_empty()  argument
123 	struct omap_mbox_fifo *fifo = &mbox->rx_fifo;  in mbox_fifo_empty()
125 	return (mbox_read_reg(mbox->parent, fifo->msg_stat) == 0);  in mbox_fifo_empty()
128 static int mbox_fifo_full(struct omap_mbox *mbox)  in mbox_fifo_full()  argument
130 	struct omap_mbox_fifo *fifo = &mbox->tx_fifo;  in mbox_fifo_full()
132 	return mbox_read_reg(mbox->parent, fifo->fifo_stat);  in mbox_fifo_full()
136 static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in ack_mbox_irq()  argument
139 				&mbox->tx_fifo : &mbox->rx_fifo;  in ack_mbox_irq()
143 	mbox_write_reg(mbox->parent, bit, irqstatus);  in ack_mbox_irq()
146 	mbox_read_reg(mbox->parent, irqstatus);  in ack_mbox_irq()
149 static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in is_mbox_irq()  argument
152 				&mbox->tx_fifo : &mbox->rx_fifo;  in is_mbox_irq()
157 	u32 enable = mbox_read_reg(mbox->parent, irqenable);  in is_mbox_irq()
158 	u32 status = mbox_read_reg(mbox->parent, irqstatus);  in is_mbox_irq()
163 static void omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in omap_mbox_enable_irq()  argument
167 				&mbox->tx_fifo : &mbox->rx_fifo;  in omap_mbox_enable_irq()
171 	l = mbox_read_reg(mbox->parent, irqenable);  in omap_mbox_enable_irq()
173 	mbox_write_reg(mbox->parent, l, irqenable);  in omap_mbox_enable_irq()
176 static void omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)  in omap_mbox_disable_irq()  argument
179 				&mbox->tx_fifo : &mbox->rx_fifo;  in omap_mbox_disable_irq()
187 	if (!mbox->intr_type)  in omap_mbox_disable_irq()
188 		bit = mbox_read_reg(mbox->parent, irqdisable) & ~bit;  in omap_mbox_disable_irq()
190 	mbox_write_reg(mbox->parent, bit, irqdisable);  in omap_mbox_disable_irq()
196 static void __mbox_tx_interrupt(struct omap_mbox *mbox)  in __mbox_tx_interrupt()  argument
198 	omap_mbox_disable_irq(mbox, IRQ_TX);  in __mbox_tx_interrupt()
199 	ack_mbox_irq(mbox, IRQ_TX);  in __mbox_tx_interrupt()
200 	mbox_chan_txdone(mbox->chan, 0);  in __mbox_tx_interrupt()
203 static void __mbox_rx_interrupt(struct omap_mbox *mbox)  in __mbox_rx_interrupt()  argument
207 	while (!mbox_fifo_empty(mbox)) {  in __mbox_rx_interrupt()
208 		msg = mbox_fifo_read(mbox);  in __mbox_rx_interrupt()
209 		mbox_chan_received_data(mbox->chan, (void *)(uintptr_t)msg);  in __mbox_rx_interrupt()
213 	ack_mbox_irq(mbox, IRQ_RX);  in __mbox_rx_interrupt()
218 	struct omap_mbox *mbox = p;  in mbox_interrupt()  local
220 	if (is_mbox_irq(mbox, IRQ_TX))  in mbox_interrupt()
221 		__mbox_tx_interrupt(mbox);  in mbox_interrupt()
223 	if (is_mbox_irq(mbox, IRQ_RX))  in mbox_interrupt()
224 		__mbox_rx_interrupt(mbox);  in mbox_interrupt()
229 static int omap_mbox_startup(struct omap_mbox *mbox)  in omap_mbox_startup()  argument
233 	ret = request_threaded_irq(mbox->irq, NULL, mbox_interrupt,  in omap_mbox_startup()
234 				   IRQF_SHARED | IRQF_ONESHOT, mbox->name,  in omap_mbox_startup()
235 				   mbox);  in omap_mbox_startup()
241 	if (mbox->send_no_irq)  in omap_mbox_startup()
242 		mbox->chan->txdone_method = TXDONE_BY_ACK;  in omap_mbox_startup()
244 	omap_mbox_enable_irq(mbox, IRQ_RX);  in omap_mbox_startup()
249 static void omap_mbox_fini(struct omap_mbox *mbox)  in omap_mbox_fini()  argument
251 	omap_mbox_disable_irq(mbox, IRQ_RX);  in omap_mbox_fini()
252 	free_irq(mbox->irq, mbox);  in omap_mbox_fini()
257 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_startup()  local
258 	struct omap_mbox_device *mdev = mbox->parent;  in omap_mbox_chan_startup()
263 	ret = omap_mbox_startup(mbox);  in omap_mbox_chan_startup()
272 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_shutdown()  local
273 	struct omap_mbox_device *mdev = mbox->parent;  in omap_mbox_chan_shutdown()
276 	omap_mbox_fini(mbox);  in omap_mbox_chan_shutdown()
281 static int omap_mbox_chan_send_noirq(struct omap_mbox *mbox, u32 msg)  in omap_mbox_chan_send_noirq()  argument
283 	if (mbox_fifo_full(mbox))  in omap_mbox_chan_send_noirq()
286 	omap_mbox_enable_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
287 	mbox_fifo_write(mbox, msg);  in omap_mbox_chan_send_noirq()
288 	omap_mbox_disable_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
291 	mbox_fifo_read(mbox);  in omap_mbox_chan_send_noirq()
292 	ack_mbox_irq(mbox, IRQ_RX);  in omap_mbox_chan_send_noirq()
297 static int omap_mbox_chan_send(struct omap_mbox *mbox, u32 msg)  in omap_mbox_chan_send()  argument
299 	if (mbox_fifo_full(mbox)) {  in omap_mbox_chan_send()
301 		omap_mbox_enable_irq(mbox, IRQ_TX);  in omap_mbox_chan_send()
305 	mbox_fifo_write(mbox, msg);  in omap_mbox_chan_send()
308 	omap_mbox_enable_irq(mbox, IRQ_TX);  in omap_mbox_chan_send()
314 	struct omap_mbox *mbox = chan->con_priv;  in omap_mbox_chan_send_data()  local
318 	if (!mbox)  in omap_mbox_chan_send_data()
321 	if (mbox->send_no_irq)  in omap_mbox_chan_send_data()
322 		ret = omap_mbox_chan_send_noirq(mbox, msg);  in omap_mbox_chan_send_data()
324 		ret = omap_mbox_chan_send(mbox, msg);  in omap_mbox_chan_send_data()
417 	struct omap_mbox *mbox;  in omap_mbox_of_xlate()  local
432 		mbox = controller->chans[i].con_priv;  in omap_mbox_of_xlate()
433 		if (!strcmp(mbox->name, node->name)) {  in omap_mbox_of_xlate()
447 	struct omap_mbox *mbox;  in omap_mbox_probe()  local
470 	if (of_property_read_u32(node, "ti,mbox-num-users", &num_users))  in omap_mbox_probe()
473 	if (of_property_read_u32(node, "ti,mbox-num-fifos", &num_fifos))  in omap_mbox_probe()
478 		dev_err(&pdev->dev, "no available mbox devices found\n");  in omap_mbox_probe()
505 		mbox = devm_kzalloc(&pdev->dev, sizeof(*mbox), GFP_KERNEL);  in omap_mbox_probe()
506 		if (!mbox)  in omap_mbox_probe()
510 		ret = of_property_read_u32_array(child, "ti,mbox-tx", tmp,  in omap_mbox_probe()
518 		ret = of_property_read_u32_array(child, "ti,mbox-rx", tmp,  in omap_mbox_probe()
530 		fifo = &mbox->tx_fifo;  in omap_mbox_probe()
538 		fifo = &mbox->rx_fifo;  in omap_mbox_probe()
546 		mbox->send_no_irq = of_property_read_bool(child, "ti,mbox-send-noirq");  in omap_mbox_probe()
547 		mbox->intr_type = intr_type;  in omap_mbox_probe()
549 		mbox->parent = mdev;  in omap_mbox_probe()
550 		mbox->name = child->name;  in omap_mbox_probe()
551 		mbox->irq = platform_get_irq(pdev, tx_irq);  in omap_mbox_probe()
552 		if (mbox->irq < 0)  in omap_mbox_probe()
553 			return mbox->irq;  in omap_mbox_probe()
554 		mbox->chan = &chnls[i];  in omap_mbox_probe()
555 		chnls[i].con_priv = mbox;  in omap_mbox_probe()