19  * @scp:	mtk_scp structure
24  * Register an ipi function to receive ipi interrupt from SCP.
28 int scp_ipi_register(struct mtk_scp *scp,  in scp_ipi_register()  argument
33 	if (!scp)  in scp_ipi_register()
39 	scp_ipi_lock(scp, id);  in scp_ipi_register()
40 	scp->ipi_desc[id].handler = handler;  in scp_ipi_register()
41 	scp->ipi_desc[id].priv = priv;  in scp_ipi_register()
42 	scp_ipi_unlock(scp, id);  in scp_ipi_register()
51  * @scp:	mtk_scp structure
54  * Unregister an ipi function to receive ipi interrupt from SCP.
56 void scp_ipi_unregister(struct mtk_scp *scp, u32 id)  in scp_ipi_unregister()  argument
58 	if (!scp)  in scp_ipi_unregister()
64 	scp_ipi_lock(scp, id);  in scp_ipi_unregister()
65 	scp->ipi_desc[id].handler = NULL;  in scp_ipi_unregister()
66 	scp->ipi_desc[id].priv = NULL;  in scp_ipi_unregister()
67 	scp_ipi_unlock(scp, id);  in scp_ipi_unregister()
72  * scp_memcpy_aligned() - Copy src to dst, where dst is in SCP SRAM region.
74  * @dst:	Pointer to the destination buffer, should be in SCP SRAM region.
78  * Since AP access of SCP SRAM don't support byte write, this always write a
110  * @scp:	mtk_scp structure
115 void scp_ipi_lock(struct mtk_scp *scp, u32 id)  in scp_ipi_lock()  argument
119 	mutex_lock(&scp->ipi_desc[id].lock);  in scp_ipi_lock()
126  * @scp:	mtk_scp structure
131 void scp_ipi_unlock(struct mtk_scp *scp, u32 id)  in scp_ipi_unlock()  argument
135 	mutex_unlock(&scp->ipi_desc[id].lock);  in scp_ipi_unlock()
140  * scp_ipi_send() - send data from AP to scp.
142  * @scp:	mtk_scp structure
149  * SCP has received the data and starts the processing.
155 int scp_ipi_send(struct mtk_scp *scp, u32 id, void *buf, unsigned int len,  in scp_ipi_send()  argument
158 	struct mtk_share_obj __iomem *send_obj = scp->send_buf;  in scp_ipi_send()
167 	mutex_lock(&scp->send_lock);  in scp_ipi_send()
169 	ret = clk_prepare_enable(scp->clk);  in scp_ipi_send()
171 		dev_err(scp->dev, "failed to enable clock\n");  in scp_ipi_send()
175 	 /* Wait until SCP receives the last command */  in scp_ipi_send()
179 			dev_err(scp->dev, "%s: IPI timeout!\n", __func__);  in scp_ipi_send()
183 	} while (readl(scp->reg_base + scp->data->host_to_scp_reg));  in scp_ipi_send()
190 	scp->ipi_id_ack[id] = false;  in scp_ipi_send()
191 	/* send the command to SCP */  in scp_ipi_send()
192 	writel(scp->data->host_to_scp_int_bit,  in scp_ipi_send()
193 	       scp->reg_base + scp->data->host_to_scp_reg);  in scp_ipi_send()
196 		/* wait for SCP's ACK */  in scp_ipi_send()
198 		ret = wait_event_timeout(scp->ack_wq,  in scp_ipi_send()
199 					 scp->ipi_id_ack[id],  in scp_ipi_send()
201 		scp->ipi_id_ack[id] = false;  in scp_ipi_send()
202 		if (WARN(!ret, "scp ipi %d ack time out !", id))  in scp_ipi_send()
209 	clk_disable_unprepare(scp->clk);  in scp_ipi_send()
211 	mutex_unlock(&scp->send_lock);  in scp_ipi_send()
218 MODULE_DESCRIPTION("MediaTek scp IPI interface");