1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2017-2018 HiSilicon Limited.
3 // Copyright (c) 2017-2018 Linaro Limited.
24 #define MBOX_BASE(mbox, ch)		((mbox)->base + ((ch) * 0x40))  argument
81 static struct hi3660_mbox *to_hi3660_mbox(struct mbox_controller *mbox)  in to_hi3660_mbox()  argument
83 	return container_of(mbox, struct hi3660_mbox, controller);  in to_hi3660_mbox()
88 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_check_state()
89 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_check_state()  local
90 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_check_state()
91 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_check_state()
103 		dev_err(mbox->dev, "%s: timeout for receiving ack\n", __func__);  in hi3660_mbox_check_state()
108 	writel(BIT(mchan->ack_irq), base + MBOX_ICLR_REG);  in hi3660_mbox_check_state()
115 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_unlock()  local
119 		writel(MBOX_IPC_UNLOCK, mbox->base + MBOX_IPC_LOCK_REG);  in hi3660_mbox_unlock()
121 		val = readl(mbox->base + MBOX_IPC_LOCK_REG);  in hi3660_mbox_unlock()
126 	} while (retry--);  in hi3660_mbox_unlock()
129 		dev_err(mbox->dev, "%s: failed to unlock mailbox\n", __func__);  in hi3660_mbox_unlock()
131 	return (!val) ? 0 : -ETIMEDOUT;  in hi3660_mbox_unlock()
136 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_acquire_channel()
137 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_acquire_channel()  local
138 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_acquire_channel()
139 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_acquire_channel()
142 	for (retry = 10; retry; retry--) {  in hi3660_mbox_acquire_channel()
145 			writel(BIT(mchan->ack_irq), base + MBOX_SRC_REG);  in hi3660_mbox_acquire_channel()
149 			if (val & BIT(mchan->ack_irq))  in hi3660_mbox_acquire_channel()
155 		dev_err(mbox->dev, "%s: failed to acquire channel\n", __func__);  in hi3660_mbox_acquire_channel()
157 	return retry ? 0 : -ETIMEDOUT;  in hi3660_mbox_acquire_channel()
177 	unsigned long ch = (unsigned long)chan->con_priv;  in hi3660_mbox_send_data()
178 	struct hi3660_mbox *mbox = to_hi3660_mbox(chan->mbox);  in hi3660_mbox_send_data()  local
179 	struct hi3660_chan_info *mchan = &mbox->mchan[ch];  in hi3660_mbox_send_data()
180 	void __iomem *base = MBOX_BASE(mbox, ch);  in hi3660_mbox_send_data()
190 	writel_relaxed(~BIT(mchan->dst_irq), base + MBOX_IMASK_REG);  in hi3660_mbox_send_data()
193 	writel_relaxed(BIT(mchan->dst_irq), base + MBOX_DST_REG);  in hi3660_mbox_send_data()
203 	writel(BIT(mchan->ack_irq), base + MBOX_SEND_REG);  in hi3660_mbox_send_data()
215 	struct hi3660_mbox *mbox = to_hi3660_mbox(controller);  in hi3660_mbox_xlate()  local
217 	unsigned int ch = spec->args[0];  in hi3660_mbox_xlate()
220 		dev_err(mbox->dev, "Invalid channel idx %d\n", ch);  in hi3660_mbox_xlate()
221 		return ERR_PTR(-EINVAL);  in hi3660_mbox_xlate()
224 	mchan = &mbox->mchan[ch];  in hi3660_mbox_xlate()
225 	mchan->dst_irq = spec->args[1];  in hi3660_mbox_xlate()
226 	mchan->ack_irq = spec->args[2];  in hi3660_mbox_xlate()
228 	return &mbox->chan[ch];  in hi3660_mbox_xlate()
232 	{ .compatible = "hisilicon,hi3660-mbox", },
240 	struct device *dev = &pdev->dev;  in hi3660_mbox_probe()
241 	struct hi3660_mbox *mbox;  in hi3660_mbox_probe()  local
247 	mbox = devm_kzalloc(dev, sizeof(*mbox), GFP_KERNEL);  in hi3660_mbox_probe()
248 	if (!mbox)  in hi3660_mbox_probe()
249 		return -ENOMEM;  in hi3660_mbox_probe()
252 	mbox->base = devm_ioremap_resource(dev, res);  in hi3660_mbox_probe()
253 	if (IS_ERR(mbox->base))  in hi3660_mbox_probe()
254 		return PTR_ERR(mbox->base);  in hi3660_mbox_probe()
256 	mbox->dev = dev;  in hi3660_mbox_probe()
257 	mbox->controller.dev = dev;  in hi3660_mbox_probe()
258 	mbox->controller.chans = mbox->chan;  in hi3660_mbox_probe()
259 	mbox->controller.num_chans = MBOX_CHAN_MAX;  in hi3660_mbox_probe()
260 	mbox->controller.ops = &hi3660_mbox_ops;  in hi3660_mbox_probe()
261 	mbox->controller.of_xlate = hi3660_mbox_xlate;  in hi3660_mbox_probe()
264 	chan = mbox->chan;  in hi3660_mbox_probe()
268 	err = devm_mbox_controller_register(dev, &mbox->controller);  in hi3660_mbox_probe()
274 	platform_set_drvdata(pdev, mbox);  in hi3660_mbox_probe()
282 		.name = "hi3660-mbox",