30 #define STI_IRQ_SET_OFFSET	0x24   /* Generate a Tx channel interrupt     */
33 #define STI_ENA_SET_OFFSET	0x84   /* Enable a channel		      */
34 #define STI_ENA_CLR_OFFSET	0xa4   /* Disable a channel		      */
42  * @mbox:	Representation of a communication channel controller
51  * A channel an be used for TX or RX
66  * @num_chan:	Maximum number of channel per instance
74  * struct sti_channel - STi Mailbox allocated channel information
77  * @instance:	Instance number channel resides in
78  * @channel:	Channel number pertaining to this container
83 	unsigned int		channel;  member
91 	unsigned int channel = chan_info->channel;  in sti_mbox_channel_is_enabled()  local
93 	return mdev->enabled[instance] & BIT(channel);  in sti_mbox_channel_is_enabled()
99 				      unsigned int channel)  in sti_mbox_to_channel()  argument
108 		    chan_info->channel == channel)  in sti_mbox_to_channel()
113 		"Channel not registered: instance: %d channel: %d\n",  in sti_mbox_to_channel()
114 		instance, channel);  in sti_mbox_to_channel()
124 	unsigned int channel = chan_info->channel;  in sti_mbox_enable_channel()  local
129 	mdev->enabled[instance] |= BIT(channel);  in sti_mbox_enable_channel()
130 	writel_relaxed(BIT(channel), base + STI_ENA_SET_OFFSET);  in sti_mbox_enable_channel()
139 	unsigned int channel = chan_info->channel;  in sti_mbox_disable_channel()  local
144 	mdev->enabled[instance] &= ~BIT(channel);  in sti_mbox_disable_channel()
145 	writel_relaxed(BIT(channel), base + STI_ENA_CLR_OFFSET);  in sti_mbox_disable_channel()
154 	unsigned int channel = chan_info->channel;  in sti_mbox_clear_irq()  local
157 	writel_relaxed(BIT(channel), base + STI_IRQ_CLR_OFFSET);  in sti_mbox_clear_irq()
165 	unsigned int channel;  in sti_mbox_irq_to_channel()  local
174 	/* An IRQ has fired, find the associated channel */  in sti_mbox_irq_to_channel()
175 	for (channel = 0; bits; channel++) {  in sti_mbox_irq_to_channel()
176 		if (!test_and_clear_bit(channel, &bits))  in sti_mbox_irq_to_channel()
179 		chan = sti_mbox_to_channel(mbox, instance, channel);  in sti_mbox_irq_to_channel()
182 				"IRQ fired on instance: %d channel: %d\n",  in sti_mbox_irq_to_channel()
183 				instance, channel);  in sti_mbox_irq_to_channel()
231 				 "  instance: %d: channel: %d [enabled: %x]\n",  in sti_mbox_irq_handler()
233 				 chan_info->channel, mdev->enabled[instance]);  in sti_mbox_irq_handler()
246 		dev_err(mdev->dev, "Spurious IRQ - was a channel requested?\n");  in sti_mbox_irq_handler()
256 	unsigned int channel = chan_info->channel;  in sti_mbox_tx_is_ready()  local
259 	if (!(readl_relaxed(base + STI_ENA_VAL_OFFSET) & BIT(channel))) {  in sti_mbox_tx_is_ready()
261 			mdev->name, instance, channel);  in sti_mbox_tx_is_ready()
265 	if (readl_relaxed(base + STI_IRQ_VAL_OFFSET) & BIT(channel)) {  in sti_mbox_tx_is_ready()
267 			mdev->name, instance, channel);  in sti_mbox_tx_is_ready()
279 	unsigned int channel = chan_info->channel;  in sti_mbox_send_data()  local
283 	writel_relaxed(BIT(channel), base + STI_IRQ_SET_OFFSET);  in sti_mbox_send_data()
286 		"Sent via Mailbox %s: instance: %d channel: %d\n",  in sti_mbox_send_data()
287 		mdev->name, instance, channel);  in sti_mbox_send_data()
311 		dev_warn(mbox->dev, "Request to free non-existent channel\n");  in sti_mbox_shutdown_chan()
315 	/* Reset channel */  in sti_mbox_shutdown_chan()
329 	unsigned int channel   = spec->args[1];  in sti_mbox_xlate()  local
333 	if (instance >= pdata->num_inst || channel  >= pdata->num_chan) {  in sti_mbox_xlate()
335 			"Invalid channel requested instance: %d channel: %d\n",  in sti_mbox_xlate()
336 			instance, channel);  in sti_mbox_xlate()
343 		/* Is requested channel free? */  in sti_mbox_xlate()
347 		    channel == chan_info->channel) {  in sti_mbox_xlate()
349 			dev_err(mbox->dev, "Channel in use\n");  in sti_mbox_xlate()
355 		 * to see if requested channel is in use  in sti_mbox_xlate()
372 	chan_info->channel	= channel;  in sti_mbox_xlate()
377 		 "Mbox: %s: Created channel: instance: %d channel: %d\n",  in sti_mbox_xlate()
378 		 mdev->name, instance, channel);  in sti_mbox_xlate()