1 // SPDX-License-Identifier: GPL-2.0+
38  * scu_ipc_send_command() - send command to SCU
43  * A write to this register results in an interrupt to the SCU core processor
49 	writel(cmd, &regs->cmd);  in scu_ipc_send_command()
53  * scu_ipc_check_status() - check status of last command
68 		status = readl(&regs->status);  in scu_ipc_check_status()
73 	} while (--loop_count);  in scu_ipc_check_status()
75 		return -ETIMEDOUT;  in scu_ipc_check_status()
79 		return -EIO;  in scu_ipc_check_status()
85 static int scu_ipc_cmd(struct ipc_regs *regs, u32 cmd, u32 sub,  in scu_ipc_cmd()  argument
91 		writel(*in++, &regs->wbuf[i]);  in scu_ipc_cmd()
93 	scu_ipc_send_command(regs, (inlen << 16) | (sub << 12) | cmd);  in scu_ipc_cmd()
98 			*out++ = readl(&regs->rbuf[i]);  in scu_ipc_cmd()
105  * scu_ipc_raw_command() - IPC command with data and pointers
107  * @sub:    IPC command sub type
119 int scu_ipc_raw_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out,  in scu_ipc_raw_command()  argument
135 		return -EINVAL;  in scu_ipc_raw_command()
137 	writel(dptr, &scu->regs->dptr);  in scu_ipc_raw_command()
138 	writel(sptr, &scu->regs->sptr);  in scu_ipc_raw_command()
141 	 * SRAM controller doesn't support 8-bit writes, it only  in scu_ipc_raw_command()
142 	 * supports 32-bit writes, so we have to copy input data into  in scu_ipc_raw_command()
152 	return scu_ipc_cmd(scu->regs, cmd, sub, inbuf, inlen, out, outlen);  in scu_ipc_raw_command()
156  * scu_ipc_simple_command() - send a simple command
158  * @sub: sub type
167 int scu_ipc_simple_command(u32 cmd, u32 sub)  in scu_ipc_simple_command()  argument
179 	scu_ipc_send_command(scu->regs, sub << 12 | cmd);  in scu_ipc_simple_command()
180 	return scu_ipc_check_status(scu->regs);  in scu_ipc_simple_command()
184  *  scu_ipc_command - command with data
186  *  @sub: sub type
194 int scu_ipc_command(u32 cmd, u32 sub, u32 *in, int inlen, u32 *out, int outlen)  in scu_ipc_command()  argument
206 	return scu_ipc_cmd(scu->regs, cmd, sub, in, inlen, out, outlen);  in scu_ipc_command()
213 	scu->regs = syscon_get_first_range(X86_SYSCON_SCU);  in scu_ipc_probe()
219 	{ .compatible = "intel,scu-ipc", .data = X86_SYSCON_SCU },