23  * @scp:	mtk_scp structure
28  * Register an ipi function to receive ipi interrupt from SCP.
32 int scp_ipi_register(struct mtk_scp *scp,  in scp_ipi_register()  argument
37 	if (!scp)  in scp_ipi_register()
43 	scp_ipi_lock(scp, id);  in scp_ipi_register()
44 	scp->ipi_desc[id].handler = handler;  in scp_ipi_register()
45 	scp->ipi_desc[id].priv = priv;  in scp_ipi_register()
46 	scp_ipi_unlock(scp, id);  in scp_ipi_register()
55  * @scp:	mtk_scp structure
58  * Unregister an ipi function to receive ipi interrupt from SCP.
60 void scp_ipi_unregister(struct mtk_scp *scp, u32 id)  in scp_ipi_unregister()  argument
62 	if (!scp)  in scp_ipi_unregister()
68 	scp_ipi_lock(scp, id);  in scp_ipi_unregister()
69 	scp->ipi_desc[id].handler = NULL;  in scp_ipi_unregister()
70 	scp->ipi_desc[id].priv = NULL;  in scp_ipi_unregister()
71 	scp_ipi_unlock(scp, id);  in scp_ipi_unregister()
76  * scp_memcpy_aligned() - Copy src to dst, where dst is in SCP SRAM region.
78  * @dst:	Pointer to the destination buffer, should be in SCP SRAM region.
82  * Since AP access of SCP SRAM don't support byte write, this always write a
114  * @scp:	mtk_scp structure
119 void scp_ipi_lock(struct mtk_scp *scp, u32 id)  in scp_ipi_lock()  argument
123 	mutex_lock(&scp->ipi_desc[id].lock);  in scp_ipi_lock()
130  * @scp:	mtk_scp structure
135 void scp_ipi_unlock(struct mtk_scp *scp, u32 id)  in scp_ipi_unlock()  argument
139 	mutex_unlock(&scp->ipi_desc[id].lock);  in scp_ipi_unlock()
144  * scp_ipi_send() - send data from AP to scp.
146  * @scp:	mtk_scp structure
153  * SCP has received the data and starts the processing.
159 int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,  in scp_ipi_send()  argument
162 	struct mtk_share_obj __iomem *send_obj = scp->send_buf;  in scp_ipi_send()
167 	scp_sizes = scp->data->scp_sizes;  in scp_ipi_send()
174 	ret = clk_prepare_enable(scp->clk);  in scp_ipi_send()
176 		dev_err(scp->dev, "failed to enable clock\n");  in scp_ipi_send()
180 	mutex_lock(&scp->send_lock);  in scp_ipi_send()
182 	 /* Wait until SCP receives the last command */  in scp_ipi_send()
183 	ret = readl_poll_timeout_atomic(scp->cluster->reg_base + scp->data->host_to_scp_reg,  in scp_ipi_send()
186 		dev_err(scp->dev, "%s: IPI timeout!\n", __func__);  in scp_ipi_send()
195 	scp->ipi_id_ack[id] = false;  in scp_ipi_send()
196 	/* send the command to SCP */  in scp_ipi_send()
197 	writel(scp->data->host_to_scp_int_bit,  in scp_ipi_send()
198 	       scp->cluster->reg_base + scp->data->host_to_scp_reg);  in scp_ipi_send()
201 		/* wait for SCP's ACK */  in scp_ipi_send()
202 		ret = wait_event_timeout(scp->ack_wq,  in scp_ipi_send()
203 					 scp->ipi_id_ack[id],  in scp_ipi_send()
205 		scp->ipi_id_ack[id] = false;  in scp_ipi_send()
206 		if (WARN(!ret, "scp ipi %d ack time out !", id))  in scp_ipi_send()
213 	mutex_unlock(&scp->send_lock);  in scp_ipi_send()
214 	clk_disable_unprepare(scp->clk);  in scp_ipi_send()
221 MODULE_DESCRIPTION("MediaTek scp IPI interface");