1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2017-2018 HiSilicon Limited.
3 // Copyright (c) 2017-2018 Linaro Limited.
25 #define MBOX_BASE(mbox, ch)		((mbox)->base + ((ch) * 0x40))  argument
48  * struct hi3660_chan_info - Hi3660 mailbox channel information
62  * struct hi3660_mbox - Hi3660 mailbox controller data
80 static struct hi3660_mbox *to_hi3660_mbox(struct mbox_controller *mbox)  in to_hi3660_mbox()  argument
82 	return container_of(mbox, struct hi3660_mbox, controller);  in to_hi3660_mbox()
87 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_check_state()
88 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_check_state()  local
89 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_check_state()
90 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_check_state()
102 		dev_err(mbox->dev, "%s: timeout for receiving ack\n", __func__);  in hi3660_mbox_check_state()
107 	writel(BIT(mchan->ack_irq), base + MBOX_ICLR_REG);  in hi3660_mbox_check_state()
114 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_unlock()  local
118 		writel(MBOX_IPC_UNLOCK, mbox->base + MBOX_IPC_LOCK_REG);  in hi3660_mbox_unlock()
120 		val = readl(mbox->base + MBOX_IPC_LOCK_REG);  in hi3660_mbox_unlock()
125 	} while (retry--);  in hi3660_mbox_unlock()
128 		dev_err(mbox->dev, "%s: failed to unlock mailbox\n", __func__);  in hi3660_mbox_unlock()
130 	return (!val) ? 0 : -ETIMEDOUT;  in hi3660_mbox_unlock()
135 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_acquire_channel()
136 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_acquire_channel()  local
137 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_acquire_channel()
138 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_acquire_channel()
141 	for (retry = 10; retry; retry--) {  in hi3660_mbox_acquire_channel()
144 			writel(BIT(mchan->ack_irq), base + MBOX_SRC_REG);  in hi3660_mbox_acquire_channel()
148 			if (val & BIT(mchan->ack_irq))  in hi3660_mbox_acquire_channel()
154 		dev_err(mbox->dev, "%s: failed to acquire channel\n", __func__);  in hi3660_mbox_acquire_channel()
156 	return retry ? 0 : -ETIMEDOUT;  in hi3660_mbox_acquire_channel()
176 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_send_data()
177 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_send_data()  local
178 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_send_data()
179 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_send_data()
189 	writel_relaxed(~BIT(mchan->dst_irq), base + MBOX_IMASK_REG);  in hi3660_mbox_send_data()
192 	writel_relaxed(BIT(mchan->dst_irq), base + MBOX_DST_REG);  in hi3660_mbox_send_data()
202 	writel(BIT(mchan->ack_irq), base + MBOX_SEND_REG);  in hi3660_mbox_send_data()
214 	struct hi3660_mbox *mbox = to_hi3660_mbox(controller);  in hi3660_mbox_xlate()  local
216 	unsigned int ch = spec->args[0];  in hi3660_mbox_xlate()
219 		dev_err(mbox->dev, "Invalid channel idx %d\n", ch);  in hi3660_mbox_xlate()
220 		return ERR_PTR(-EINVAL);  in hi3660_mbox_xlate()
223 	mchan = &mbox->mchan[ch];  in hi3660_mbox_xlate()
224 	mchan->dst_irq = spec->args[1];  in hi3660_mbox_xlate()
225 	mchan->ack_irq = spec->args[2];  in hi3660_mbox_xlate()
227 	return &mbox->chan[ch];  in hi3660_mbox_xlate()
231 	{ .compatible = "hisilicon,hi3660-mbox", },
239 	struct device *dev = &pdev->dev;  in hi3660_mbox_probe()
240 	struct hi3660_mbox *mbox;  in hi3660_mbox_probe()  local
245 	mbox = devm_kzalloc(dev, sizeof(*mbox), GFP_KERNEL);  in hi3660_mbox_probe()
246 	if (!mbox)  in hi3660_mbox_probe()
247 		return -ENOMEM;  in hi3660_mbox_probe()
249 	mbox->base = devm_platform_ioremap_resource(pdev, 0);  in hi3660_mbox_probe()
250 	if (IS_ERR(mbox->base))  in hi3660_mbox_probe()
251 		return PTR_ERR(mbox->base);  in hi3660_mbox_probe()
253 	mbox->dev = dev;  in hi3660_mbox_probe()
254 	mbox->controller.dev = dev;  in hi3660_mbox_probe()
255 	mbox->controller.chans = mbox->chan;  in hi3660_mbox_probe()
256 	mbox->controller.num_chans = MBOX_CHAN_MAX;  in hi3660_mbox_probe()
257 	mbox->controller.ops = &hi3660_mbox_ops;  in hi3660_mbox_probe()
258 	mbox->controller.of_xlate = hi3660_mbox_xlate;  in hi3660_mbox_probe()
261 	chan = mbox->chan;  in hi3660_mbox_probe()
265 	err = devm_mbox_controller_register(dev, &mbox->controller);  in hi3660_mbox_probe()
271 	platform_set_drvdata(pdev, mbox);  in hi3660_mbox_probe()
279 		.name = "hi3660-mbox",