src/soc/intel/tigerlake/early_tcss.c

/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <console/console.h>
#include <device/pci.h>
#include <intelblocks/pmc_ipc.h>
#include <soc/early_tcss.h>
#include <soc/pci_devs.h>
#include <stdlib.h>
#include <inttypes.h>


static uint32_t tcss_make_conn_cmd(int u, int u3, int u2, int ufp, int hsl,
					int sbu, int acc)
{
	return TCSS_CD_FIELD(USAGE, u) |
		TCSS_CD_FIELD(USB3, u3) |
		TCSS_CD_FIELD(USB2, u2) |
		TCSS_CD_FIELD(UFP, ufp) |
		TCSS_CD_FIELD(HSL, hsl) |
		TCSS_CD_FIELD(SBU, sbu) |
		TCSS_CD_FIELD(ACC, acc);
}

static uint32_t tcss_make_alt_mode_cmd_buf_0(int u, int u3, int m)
{
	return TCSS_ALT_FIELD(USAGE, u) |
		TCSS_ALT_FIELD(USB3, u3) |
		TCSS_ALT_FIELD(MODE, m);

}

static uint32_t tcss_make_alt_mode_cmd_buf_1(int p, int c, int ufp, int dp)
{
	return TCSS_ALT_FIELD(POLARITY, p) |
		TCSS_ALT_FIELD(CABLE, c) |
		TCSS_ALT_FIELD(UFP, ufp) |
		TCSS_ALT_FIELD(DP_MODE, dp);
}

static uint32_t tcss_make_safe_mode_cmd(int u, int u3)
{
	return TCSS_CD_FIELD(USAGE, u) |
		TCSS_CD_FIELD(USB3, u3);
}


static uint32_t tcss_make_hpd_mode_cmd(int u, int u3, int hpd_lvl, int hpd_irq)
{
	return TCSS_HPD_FIELD(USAGE, u) |
		TCSS_HPD_FIELD(USB3, u3) |
		TCSS_HPD_FIELD(LVL, hpd_lvl) |
		TCSS_HPD_FIELD(IRQ, hpd_irq);

}

static int send_pmc_req(int cmd_type, const struct pmc_ipc_buffer *req,
			struct pmc_ipc_buffer *res, uint32_t size)
{

	uint32_t cmd_reg;
	uint32_t res_reg;
	int tries = 2;
	int r;

	cmd_reg = pmc_make_ipc_cmd(PMC_IPC_USBC_CMD_ID, PMC_IPC_USBC_SUBCMD_ID,
				   size);

	printk(BIOS_DEBUG, "Raw Buffer output 0 %08" PRIx32 "\n", req->buf[0]);
	printk(BIOS_DEBUG, "Raw Buffer output 1 %08" PRIx32 "\n", req->buf[1]);

	do {
		r = pmc_send_ipc_cmd(cmd_reg, req, res);
		if (r < 0) {
			printk(BIOS_ERR, "pmc_send_ipc_cmd failed\n");
			return -1;
		}

		res_reg = res->buf[0];
		if (cmd_type == CONNECT_REQ) {
			if (!TCSS_CONN_STATUS_HAS_FAILED(res_reg)) {
				printk(BIOS_DEBUG, "pmc_send_ipc_cmd succeeded\n");
				return 0;
			}

			if (TCSS_CONN_STATUS_IS_FATAL(res_reg)) {
				printk(BIOS_ERR, "pmc_send_ipc_cmd status: fatal\n");
				return -1;
			}
		} else {
			if (!TCSS_STATUS_HAS_FAILED(res_reg)) {
				printk(BIOS_DEBUG, "pmc_send_ipc_cmd succeeded\n");
				return 0;
			}

			if (TCSS_STATUS_IS_FATAL(res_reg)) {
				printk(BIOS_ERR, "pmc_send_ipc_cmd status: fatal\n");
				return -1;
			}
		}
	} while (--tries >= 0);

	printk(BIOS_ERR, "pmc_send_ipc_cmd failed after retries\n");
	return -1;
}

static int send_pmc_connect_request(int port, struct tcss_mux mux_data,
					struct pmc_ipc_buffer *res)
{
	uint32_t cmd;
	struct pmc_ipc_buffer req = { 0 };

	cmd = tcss_make_conn_cmd(
		PMC_IPC_TCSS_CONN_REQ_RES,
		mux_data.usb3_port,
		mux_data.usb2_port,
		mux_data.ufp,
		mux_data.polarity,
		mux_data.polarity,
		mux_data.acc);

	req.buf[0] = cmd;

	printk(BIOS_DEBUG, "port C%d CONN req: usage %d usb3 %d usb2 %d "
	      "ufp %d ori_hsl %d ori_sbu %d dbg_acc %d\n",
	      port,
	      GET_TCSS_CD_FIELD(USAGE, cmd),
	      GET_TCSS_CD_FIELD(USB3, cmd),
	      GET_TCSS_CD_FIELD(USB2, cmd),
	      GET_TCSS_CD_FIELD(UFP, cmd),
	      GET_TCSS_CD_FIELD(HSL, cmd),
	      GET_TCSS_CD_FIELD(SBU, cmd),
	      GET_TCSS_CD_FIELD(ACC, cmd));

	return send_pmc_req(CONNECT_REQ, &req, res, PMC_IPC_CONN_REQ_SIZE);
}

static int send_pmc_safe_mode_request(int port, struct tcss_mux mux_data,
					struct pmc_ipc_buffer *res)
{
	uint32_t cmd;
	struct pmc_ipc_buffer req = { 0 };

	cmd = tcss_make_safe_mode_cmd(PMC_IPC_TCSS_SAFE_MODE_REQ_RES, mux_data.usb3_port);

	req.buf[0] = cmd;

	printk(BIOS_DEBUG, "port C%d SAFE req: usage %d usb3 %d\n",
		port,
		GET_TCSS_CD_FIELD(USAGE, cmd),
		GET_TCSS_CD_FIELD(USB3, cmd));

	return send_pmc_req(SAFE_REQ, &req, res, PMC_IPC_SAFE_REQ_SIZE);
}

static int send_pmc_dp_hpd_request(int port, struct tcss_mux mux_data)
{
	struct pmc_ipc_buffer *res = NULL;
	struct pmc_ipc_buffer req = { 0 };
	uint32_t cmd;

	cmd = tcss_make_hpd_mode_cmd(
		PMC_IPC_TCSS_HPD_REQ_RES,
		mux_data.usb3_port,
		mux_data.hpd_lvl,
		mux_data.hpd_irq);

	req.buf[0] = cmd;

	return send_pmc_req(HPD_REQ, &req, res, PMC_IPC_HPD_REQ_SIZE);

}

static int send_pmc_dp_mode_request(int port, struct tcss_mux mux_data,
					struct pmc_ipc_buffer *res)
{
	uint32_t cmd;
	uint8_t dp_mode;
	int ret;

	struct pmc_ipc_buffer req = { 0 };

	cmd = tcss_make_alt_mode_cmd_buf_0(
		PMC_IPC_TCSS_ALTMODE_REQ_RES,
		mux_data.usb3_port,
		PMC_IPC_DP_MODE);

	req.buf[0] = cmd;

	printk(BIOS_DEBUG, "port C%d ALT_1 req: usage %d usb3 %d dp_mode %d\n",
		port,
		GET_TCSS_ALT_FIELD(USAGE, cmd),
		GET_TCSS_ALT_FIELD(USB3, cmd),
		GET_TCSS_ALT_FIELD(MODE, cmd));

	switch (mux_data.dp_mode) {
	case MODE_DP_PIN_A:
		dp_mode = 1;
		break;
	case MODE_DP_PIN_B:
		dp_mode = 2;
		break;
	case MODE_DP_PIN_C:
		dp_mode = 3;
		break;
	case MODE_DP_PIN_D:
		dp_mode = 4;
		break;
	case MODE_DP_PIN_E:
		dp_mode = 5;
		break;
	case MODE_DP_PIN_F:
		dp_mode = 6;
		break;
	default:
		dp_mode = 0;
		break;
	}

	cmd = tcss_make_alt_mode_cmd_buf_1(
		mux_data.polarity,
		mux_data.cable,
		0, /* ufp is not supported in DP ALT Mode request */
		dp_mode);

	printk(BIOS_DEBUG, "port C%d ALT_2 req: polarity %d cable %d ufp %d "
				"dp_mode %d\n",
		port,
		GET_TCSS_ALT_FIELD(POLARITY, cmd),
		GET_TCSS_ALT_FIELD(CABLE, cmd),
		GET_TCSS_ALT_FIELD(UFP, cmd),
		GET_TCSS_ALT_FIELD(DP_MODE, cmd));

	req.buf[1] = cmd;

	ret = send_pmc_req(DP_REQ, &req, res, PMC_IPC_ALT_REQ_SIZE);
	if (ret)
		return ret;

	send_pmc_dp_hpd_request(port, mux_data);
	return 0;
}

void update_tcss_mux(int port, struct tcss_mux mux_data)
{
	struct pmc_ipc_buffer *rbuf = NULL;
	int ret = 0;

	/* check if mux has a DP device */
	if (mux_data.dp) {
		ret = send_pmc_connect_request(port, mux_data, rbuf);
		if (ret) {
			printk(BIOS_ERR, "Port %d connect request failed\n", port);
			return;
		}
		ret = send_pmc_safe_mode_request(port, mux_data, rbuf);
		if (ret) {
			printk(BIOS_ERR, "Port %d safe mode request failed\n", port);
			return;
		}

		ret = send_pmc_dp_mode_request(port, mux_data, rbuf);
	}

	if (ret)
		printk(BIOS_ERR, "Port C%d mux set failed with error %d\n", port, ret);
}

__weak void mainboard_early_tcss_enable(void)
{
	/* to be overwritten by each mainboard that needs early tcss */
}