drivers/mailbox/bcm2835-mailbox.c

63 	return container_of(link->mbox, struct bcm2835_mbox, controller);
68 	struct bcm2835_mbox *mbox = dev_id;
69 	struct device *dev = mbox->controller.dev;
70 	struct mbox_chan *link = &mbox->controller.chans[0];
72 	while (!(readl(mbox->regs + MAIL0_STA) & ARM_MS_EMPTY)) {
73 		u32 msg = readl(mbox->regs + MAIL0_RD);
82 	struct bcm2835_mbox *mbox = bcm2835_link_mbox(link);
85 	spin_lock(&mbox->lock);
86 	writel(msg, mbox->regs + MAIL1_WRT);
87 	dev_dbg(mbox->controller.dev, "Request 0x%08X\n", msg);
88 	spin_unlock(&mbox->lock);
94 	struct bcm2835_mbox *mbox = bcm2835_link_mbox(link);
97 	writel(ARM_MC_IHAVEDATAIRQEN, mbox->regs + MAIL0_CNF);
104 	struct bcm2835_mbox *mbox = bcm2835_link_mbox(link);
106 	writel(0, mbox->regs + MAIL0_CNF);
111 	struct bcm2835_mbox *mbox = bcm2835_link_mbox(link);
114 	spin_lock(&mbox->lock);
115 	ret = !(readl(mbox->regs + MAIL1_STA) & ARM_MS_FULL);
116 	spin_unlock(&mbox->lock);
127 static struct mbox_chan *bcm2835_mbox_index_xlate(struct mbox_controller *mbox,
133 	return &mbox->chans[0];
140 	struct bcm2835_mbox *mbox;
142 	mbox = devm_kzalloc(dev, sizeof(*mbox), GFP_KERNEL);
143 	if (mbox == NULL)
145 	spin_lock_init(&mbox->lock);
148 			       bcm2835_mbox_irq, 0, dev_name(dev), mbox);
155 	mbox->regs = devm_platform_ioremap_resource(pdev, 0);
156 	if (IS_ERR(mbox->regs)) {
157 		ret = PTR_ERR(mbox->regs);
161 	mbox->controller.txdone_poll = true;
162 	mbox->controller.txpoll_period = 5;
163 	mbox->controller.ops = &bcm2835_mbox_chan_ops;
164 	mbox->controller.of_xlate = &bcm2835_mbox_index_xlate;
165 	mbox->controller.dev = dev;
166 	mbox->controller.num_chans = 1;
167 	mbox->controller.chans = devm_kzalloc(dev,
168 		sizeof(*mbox->controller.chans), GFP_KERNEL);
169 	if (!mbox->controller.chans)
172 	ret = devm_mbox_controller_register(dev, &mbox->controller);
176 	platform_set_drvdata(pdev, mbox);
183 	{ .compatible = "brcm,bcm2835-mbox", },
190 		.name = "bcm2835-mbox",