From e636c8d336489bf3eed5878299e6cc045bbad077 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:17:29 +0000
Subject: [PATCH] debug lk

---
 kernel/drivers/fsi/fsi-master-hub.c |   71 +++++------------------------------
 1 files changed, 11 insertions(+), 60 deletions(-)

diff --git a/kernel/drivers/fsi/fsi-master-hub.c b/kernel/drivers/fsi/fsi-master-hub.c
index b3c1e9d..01f0a79 100644
--- a/kernel/drivers/fsi/fsi-master-hub.c
+++ b/kernel/drivers/fsi/fsi-master-hub.c
@@ -1,16 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * FSI hub master driver
  *
  * Copyright (C) IBM Corporation 2016
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/delay.h>
@@ -21,53 +13,7 @@
 
 #include "fsi-master.h"
 
-/* Control Registers */
-#define FSI_MMODE		0x0		/* R/W: mode */
-#define FSI_MDLYR		0x4		/* R/W: delay */
-#define FSI_MCRSP		0x8		/* R/W: clock rate */
-#define FSI_MENP0		0x10		/* R/W: enable */
-#define FSI_MLEVP0		0x18		/* R: plug detect */
-#define FSI_MSENP0		0x18		/* S: Set enable */
-#define FSI_MCENP0		0x20		/* C: Clear enable */
-#define FSI_MAEB		0x70		/* R: Error address */
-#define FSI_MVER		0x74		/* R: master version/type */
-#define FSI_MRESP0		0xd0		/* W: Port reset */
-#define FSI_MESRB0		0x1d0		/* R: Master error status */
-#define FSI_MRESB0		0x1d0		/* W: Reset bridge */
-#define FSI_MECTRL		0x2e0		/* W: Error control */
-
-/* MMODE: Mode control */
-#define FSI_MMODE_EIP		0x80000000	/* Enable interrupt polling */
-#define FSI_MMODE_ECRC		0x40000000	/* Enable error recovery */
-#define FSI_MMODE_EPC		0x10000000	/* Enable parity checking */
-#define FSI_MMODE_P8_TO_LSB	0x00000010	/* Timeout value LSB */
-						/*   MSB=1, LSB=0 is 0.8 ms */
-						/*   MSB=0, LSB=1 is 0.9 ms */
-#define FSI_MMODE_CRS0SHFT	18		/* Clk rate selection 0 shift */
-#define FSI_MMODE_CRS0MASK	0x3ff		/* Clk rate selection 0 mask */
-#define FSI_MMODE_CRS1SHFT	8		/* Clk rate selection 1 shift */
-#define FSI_MMODE_CRS1MASK	0x3ff		/* Clk rate selection 1 mask */
-
-/* MRESB: Reset brindge */
-#define FSI_MRESB_RST_GEN	0x80000000	/* General reset */
-#define FSI_MRESB_RST_ERR	0x40000000	/* Error Reset */
-
-/* MRESB: Reset port */
-#define FSI_MRESP_RST_ALL_MASTER 0x20000000	/* Reset all FSI masters */
-#define FSI_MRESP_RST_ALL_LINK	0x10000000	/* Reset all FSI port contr. */
-#define FSI_MRESP_RST_MCR	0x08000000	/* Reset FSI master reg. */
-#define FSI_MRESP_RST_PYE	0x04000000	/* Reset FSI parity error */
-#define FSI_MRESP_RST_ALL	0xfc000000	/* Reset any error */
-
-/* MECTRL: Error control */
-#define FSI_MECTRL_EOAE		0x8000		/* Enable machine check when */
-						/* master 0 in error */
-#define FSI_MECTRL_P8_AUTO_TERM	0x4000		/* Auto terminate */
-
 #define FSI_ENGID_HUB_MASTER		0x1c
-#define FSI_HUB_LINK_OFFSET		0x80000
-#define FSI_HUB_LINK_SIZE		0x80000
-#define FSI_HUB_MASTER_MAX_LINKS	8
 
 #define FSI_LINK_ENABLE_SETUP_TIME	10	/* in mS */
 
@@ -131,7 +77,8 @@
 	return hub_master_write(master, link, 0, addr, &cmd, sizeof(cmd));
 }
 
-static int hub_master_link_enable(struct fsi_master *master, int link)
+static int hub_master_link_enable(struct fsi_master *master, int link,
+				  bool enable)
 {
 	struct fsi_master_hub *hub = to_fsi_master_hub(master);
 	int idx, bit;
@@ -143,13 +90,17 @@
 
 	reg = cpu_to_be32(0x80000000 >> bit);
 
+	if (!enable)
+		return fsi_device_write(hub->upstream, FSI_MCENP0 + (4 * idx),
+					&reg, 4);
+
 	rc = fsi_device_write(hub->upstream, FSI_MSENP0 + (4 * idx), &reg, 4);
+	if (rc)
+		return rc;
 
 	mdelay(FSI_LINK_ENABLE_SETUP_TIME);
 
-	fsi_device_read(hub->upstream, FSI_MENP0 + (4 * idx), &reg, 4);
-
-	return rc;
+	return 0;
 }
 
 static void hub_master_release(struct device *dev)
@@ -325,7 +276,7 @@
 	return 0;
 }
 
-static struct fsi_device_id hub_master_ids[] = {
+static const struct fsi_device_id hub_master_ids[] = {
 	{
 		.engine_type = FSI_ENGID_HUB_MASTER,
 		.version = FSI_VERSION_ANY,

--
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