From 45b0e1589b25ea3106a8c8d18bf653fde95baa9f Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Wed, 17 Jan 2018 15:34:22 +0800
Subject: [PATCH 20/30] guts: support layerscape

This is an integrated patch for layerscape guts support.

Signed-off-by: Roy Pledge <roy.pledge@nxp.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Amrita Kumari <amrita.kumari@nxp.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
 drivers/soc/fsl/guts.c   | 238 +++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/fsl/guts.h | 125 +++++++++++++++----------
 2 files changed, 315 insertions(+), 48 deletions(-)
 create mode 100644 drivers/soc/fsl/guts.c

--- /dev/null
+++ b/drivers/soc/fsl/guts.c
@@ -0,0 +1,238 @@
+/*
+ * Freescale QorIQ Platforms GUTS Driver
+ *
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/of_fdt.h>
+#include <linux/sys_soc.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/fsl/guts.h>
+
+struct guts {
+	struct ccsr_guts __iomem *regs;
+	bool little_endian;
+};
+
+struct fsl_soc_die_attr {
+	char	*die;
+	u32	svr;
+	u32	mask;
+};
+
+static struct guts *guts;
+static struct soc_device_attribute soc_dev_attr;
+static struct soc_device *soc_dev;
+
+
+/* SoC die attribute definition for QorIQ platform */
+static const struct fsl_soc_die_attr fsl_soc_die[] = {
+	/*
+	 * Power Architecture-based SoCs T Series
+	 */
+
+	/* Die: T4240, SoC: T4240/T4160/T4080 */
+	{ .die		= "T4240",
+	  .svr		= 0x82400000,
+	  .mask		= 0xfff00000,
+	},
+	/* Die: T1040, SoC: T1040/T1020/T1042/T1022 */
+	{ .die		= "T1040",
+	  .svr		= 0x85200000,
+	  .mask		= 0xfff00000,
+	},
+	/* Die: T2080, SoC: T2080/T2081 */
+	{ .die		= "T2080",
+	  .svr		= 0x85300000,
+	  .mask		= 0xfff00000,
+	},
+	/* Die: T1024, SoC: T1024/T1014/T1023/T1013 */
+	{ .die		= "T1024",
+	  .svr		= 0x85400000,
+	  .mask		= 0xfff00000,
+	},
+
+	/*
+	 * ARM-based SoCs LS Series
+	 */
+
+	/* Die: LS1043A, SoC: LS1043A/LS1023A */
+	{ .die		= "LS1043A",
+	  .svr		= 0x87920000,
+	  .mask		= 0xffff0000,
+	},
+	/* Die: LS2080A, SoC: LS2080A/LS2040A/LS2085A */
+	{ .die		= "LS2080A",
+	  .svr		= 0x87010000,
+	  .mask		= 0xff3f0000,
+	},
+	/* Die: LS1088A, SoC: LS1088A/LS1048A/LS1084A/LS1044A */
+	{ .die		= "LS1088A",
+	  .svr		= 0x87030000,
+	  .mask		= 0xff3f0000,
+	},
+	/* Die: LS1012A, SoC: LS1012A */
+	{ .die		= "LS1012A",
+	  .svr		= 0x87040000,
+	  .mask		= 0xffff0000,
+	},
+	/* Die: LS1046A, SoC: LS1046A/LS1026A */
+	{ .die		= "LS1046A",
+	  .svr		= 0x87070000,
+	  .mask		= 0xffff0000,
+	},
+	/* Die: LS2088A, SoC: LS2088A/LS2048A/LS2084A/LS2044A */
+	{ .die		= "LS2088A",
+	  .svr		= 0x87090000,
+	  .mask		= 0xff3f0000,
+	},
+	/* Die: LS1021A, SoC: LS1021A/LS1020A/LS1022A */
+	{ .die		= "LS1021A",
+	  .svr		= 0x87000000,
+	  .mask		= 0xfff70000,
+	},
+	{ },
+};
+
+static const struct fsl_soc_die_attr *fsl_soc_die_match(
+	u32 svr, const struct fsl_soc_die_attr *matches)
+{
+	while (matches->svr) {
+		if (matches->svr == (svr & matches->mask))
+			return matches;
+		matches++;
+	};
+	return NULL;
+}
+
+u32 fsl_guts_get_svr(void)
+{
+	u32 svr = 0;
+
+	if (!guts || !guts->regs)
+		return svr;
+
+	if (guts->little_endian)
+		svr = ioread32(&guts->regs->svr);
+	else
+		svr = ioread32be(&guts->regs->svr);
+
+	return svr;
+}
+EXPORT_SYMBOL(fsl_guts_get_svr);
+
+static int fsl_guts_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	const struct fsl_soc_die_attr *soc_die;
+	const char *machine;
+	u32 svr;
+
+	/* Initialize guts */
+	guts = devm_kzalloc(dev, sizeof(*guts), GFP_KERNEL);
+	if (!guts)
+		return -ENOMEM;
+
+	guts->little_endian = of_property_read_bool(np, "little-endian");
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	guts->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(guts->regs))
+		return PTR_ERR(guts->regs);
+
+	/* Register soc device */
+	machine = of_flat_dt_get_machine_name();
+	if (machine)
+		soc_dev_attr.machine = devm_kstrdup(dev, machine, GFP_KERNEL);
+
+	svr = fsl_guts_get_svr();
+	soc_die = fsl_soc_die_match(svr, fsl_soc_die);
+	if (soc_die) {
+		soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL,
+						     "QorIQ %s", soc_die->die);
+	} else {
+		soc_dev_attr.family = devm_kasprintf(dev, GFP_KERNEL, "QorIQ");
+	}
+	soc_dev_attr.soc_id = devm_kasprintf(dev, GFP_KERNEL,
+					     "svr:0x%08x", svr);
+	soc_dev_attr.revision = devm_kasprintf(dev, GFP_KERNEL, "%d.%d",
+					       (svr >>  4) & 0xf, svr & 0xf);
+
+	soc_dev = soc_device_register(&soc_dev_attr);
+	if (IS_ERR(soc_dev))
+		return PTR_ERR(soc_dev);
+
+	pr_info("Machine: %s\n", soc_dev_attr.machine);
+	pr_info("SoC family: %s\n", soc_dev_attr.family);
+	pr_info("SoC ID: %s, Revision: %s\n",
+		soc_dev_attr.soc_id, soc_dev_attr.revision);
+	return 0;
+}
+
+static int fsl_guts_remove(struct platform_device *dev)
+{
+	soc_device_unregister(soc_dev);
+	return 0;
+}
+
+/*
+ * Table for matching compatible strings, for device tree
+ * guts node, for Freescale QorIQ SOCs.
+ */
+static const struct of_device_id fsl_guts_of_match[] = {
+	{ .compatible = "fsl,qoriq-device-config-1.0", },
+	{ .compatible = "fsl,qoriq-device-config-2.0", },
+	{ .compatible = "fsl,p1010-guts", },
+	{ .compatible = "fsl,p1020-guts", },
+	{ .compatible = "fsl,p1021-guts", },
+	{ .compatible = "fsl,p1022-guts", },
+	{ .compatible = "fsl,p1023-guts", },
+	{ .compatible = "fsl,p2020-guts", },
+	{ .compatible = "fsl,bsc9131-guts", },
+	{ .compatible = "fsl,bsc9132-guts", },
+	{ .compatible = "fsl,mpc8536-guts", },
+	{ .compatible = "fsl,mpc8544-guts", },
+	{ .compatible = "fsl,mpc8548-guts", },
+	{ .compatible = "fsl,mpc8568-guts", },
+	{ .compatible = "fsl,mpc8569-guts", },
+	{ .compatible = "fsl,mpc8572-guts", },
+	{ .compatible = "fsl,ls1021a-dcfg", },
+	{ .compatible = "fsl,ls1043a-dcfg", },
+	{ .compatible = "fsl,ls1046a-dcfg", },
+	{ .compatible = "fsl,ls2080a-dcfg", },
+	{ .compatible = "fsl,ls1088a-dcfg", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, fsl_guts_of_match);
+
+static struct platform_driver fsl_guts_driver = {
+	.driver = {
+		.name = "fsl-guts",
+		.of_match_table = fsl_guts_of_match,
+	},
+	.probe = fsl_guts_probe,
+	.remove = fsl_guts_remove,
+};
+
+static int __init fsl_guts_init(void)
+{
+	return platform_driver_register(&fsl_guts_driver);
+}
+core_initcall(fsl_guts_init);
+
+static void __exit fsl_guts_exit(void)
+{
+	platform_driver_unregister(&fsl_guts_driver);
+}
+module_exit(fsl_guts_exit);
--- a/include/linux/fsl/guts.h
+++ b/include/linux/fsl/guts.h
@@ -30,83 +30,112 @@
  * #ifdefs.
  */
 struct ccsr_guts {
-	__be32	porpllsr;	/* 0x.0000 - POR PLL Ratio Status Register */
-	__be32	porbmsr;	/* 0x.0004 - POR Boot Mode Status Register */
-	__be32	porimpscr;	/* 0x.0008 - POR I/O Impedance Status and Control Register */
-	__be32	pordevsr;	/* 0x.000c - POR I/O Device Status Register */
-	__be32	pordbgmsr;	/* 0x.0010 - POR Debug Mode Status Register */
-	__be32	pordevsr2;	/* 0x.0014 - POR device status register 2 */
+	u32	porpllsr;	/* 0x.0000 - POR PLL Ratio Status Register */
+	u32	porbmsr;	/* 0x.0004 - POR Boot Mode Status Register */
+	u32	porimpscr;	/* 0x.0008 - POR I/O Impedance Status and
+				 *           Control Register
+				 */
+	u32	pordevsr;	/* 0x.000c - POR I/O Device Status Register */
+	u32	pordbgmsr;	/* 0x.0010 - POR Debug Mode Status Register */
+	u32	pordevsr2;	/* 0x.0014 - POR device status register 2 */
 	u8	res018[0x20 - 0x18];
-	__be32	porcir;		/* 0x.0020 - POR Configuration Information Register */
+	u32	porcir;		/* 0x.0020 - POR Configuration Information
+				 *           Register
+				 */
 	u8	res024[0x30 - 0x24];
-	__be32	gpiocr;		/* 0x.0030 - GPIO Control Register */
+	u32	gpiocr;		/* 0x.0030 - GPIO Control Register */
 	u8	res034[0x40 - 0x34];
-	__be32	gpoutdr;	/* 0x.0040 - General-Purpose Output Data Register */
+	u32	gpoutdr;	/* 0x.0040 - General-Purpose Output Data
+				 *           Register
+				 */
 	u8	res044[0x50 - 0x44];
-	__be32	gpindr;		/* 0x.0050 - General-Purpose Input Data Register */
+	u32	gpindr;		/* 0x.0050 - General-Purpose Input Data
+				 *           Register
+				 */
 	u8	res054[0x60 - 0x54];
-	__be32	pmuxcr;		/* 0x.0060 - Alternate Function Signal Multiplex Control */
-        __be32  pmuxcr2;	/* 0x.0064 - Alternate function signal multiplex control 2 */
-        __be32  dmuxcr;		/* 0x.0068 - DMA Mux Control Register */
+	u32	pmuxcr;		/* 0x.0060 - Alternate Function Signal
+				 *           Multiplex Control
+				 */
+	u32	pmuxcr2;	/* 0x.0064 - Alternate function signal
+				 *           multiplex control 2
+				 */
+	u32	dmuxcr;		/* 0x.0068 - DMA Mux Control Register */
         u8	res06c[0x70 - 0x6c];
-	__be32	devdisr;	/* 0x.0070 - Device Disable Control */
+	u32	devdisr;	/* 0x.0070 - Device Disable Control */
 #define CCSR_GUTS_DEVDISR_TB1	0x00001000
 #define CCSR_GUTS_DEVDISR_TB0	0x00004000
-	__be32	devdisr2;	/* 0x.0074 - Device Disable Control 2 */
+	u32	devdisr2;	/* 0x.0074 - Device Disable Control 2 */
 	u8	res078[0x7c - 0x78];
-	__be32  pmjcr;		/* 0x.007c - 4 Power Management Jog Control Register */
-	__be32	powmgtcsr;	/* 0x.0080 - Power Management Status and Control Register */
-	__be32  pmrccr;		/* 0x.0084 - Power Management Reset Counter Configuration Register */
-	__be32  pmpdccr;	/* 0x.0088 - Power Management Power Down Counter Configuration Register */
-	__be32  pmcdr;		/* 0x.008c - 4Power management clock disable register */
-	__be32	mcpsumr;	/* 0x.0090 - Machine Check Summary Register */
-	__be32	rstrscr;	/* 0x.0094 - Reset Request Status and Control Register */
-	__be32  ectrstcr;	/* 0x.0098 - Exception reset control register */
-	__be32  autorstsr;	/* 0x.009c - Automatic reset status register */
-	__be32	pvr;		/* 0x.00a0 - Processor Version Register */
-	__be32	svr;		/* 0x.00a4 - System Version Register */
+	u32	pmjcr;		/* 0x.007c - 4 Power Management Jog Control
+				 *           Register
+				 */
+	u32	powmgtcsr;	/* 0x.0080 - Power Management Status and
+				 *           Control Register
+				 */
+	u32	pmrccr;		/* 0x.0084 - Power Management Reset Counter
+				 *           Configuration Register
+				 */
+	u32	pmpdccr;	/* 0x.0088 - Power Management Power Down Counter
+				 *           Configuration Register
+				 */
+	u32	pmcdr;		/* 0x.008c - 4Power management clock disable
+				 *           register
+				 */
+	u32	mcpsumr;	/* 0x.0090 - Machine Check Summary Register */
+	u32	rstrscr;	/* 0x.0094 - Reset Request Status and
+				 *           Control Register
+				 */
+	u32	ectrstcr;	/* 0x.0098 - Exception reset control register */
+	u32	autorstsr;	/* 0x.009c - Automatic reset status register */
+	u32	pvr;		/* 0x.00a0 - Processor Version Register */
+	u32	svr;		/* 0x.00a4 - System Version Register */
 	u8	res0a8[0xb0 - 0xa8];
-	__be32	rstcr;		/* 0x.00b0 - Reset Control Register */
+	u32	rstcr;		/* 0x.00b0 - Reset Control Register */
 	u8	res0b4[0xc0 - 0xb4];
-	__be32  iovselsr;	/* 0x.00c0 - I/O voltage select status register
+	u32	iovselsr;	/* 0x.00c0 - I/O voltage select status register
 					     Called 'elbcvselcr' on 86xx SOCs */
 	u8	res0c4[0x100 - 0xc4];
-	__be32	rcwsr[16];	/* 0x.0100 - Reset Control Word Status registers
+	u32	rcwsr[16];	/* 0x.0100 - Reset Control Word Status registers
 					     There are 16 registers */
 	u8	res140[0x224 - 0x140];
-	__be32  iodelay1;	/* 0x.0224 - IO delay control register 1 */
-	__be32  iodelay2;	/* 0x.0228 - IO delay control register 2 */
+	u32	iodelay1;	/* 0x.0224 - IO delay control register 1 */
+	u32	iodelay2;	/* 0x.0228 - IO delay control register 2 */
 	u8	res22c[0x604 - 0x22c];
-	__be32	pamubypenr; 	/* 0x.604 - PAMU bypass enable register */
+	u32	pamubypenr;	/* 0x.604 - PAMU bypass enable register */
 	u8	res608[0x800 - 0x608];
-	__be32	clkdvdr;	/* 0x.0800 - Clock Divide Register */
+	u32	clkdvdr;	/* 0x.0800 - Clock Divide Register */
 	u8	res804[0x900 - 0x804];
-	__be32	ircr;		/* 0x.0900 - Infrared Control Register */
+	u32	ircr;		/* 0x.0900 - Infrared Control Register */
 	u8	res904[0x908 - 0x904];
-	__be32	dmacr;		/* 0x.0908 - DMA Control Register */
+	u32	dmacr;		/* 0x.0908 - DMA Control Register */
 	u8	res90c[0x914 - 0x90c];
-	__be32	elbccr;		/* 0x.0914 - eLBC Control Register */
+	u32	elbccr;		/* 0x.0914 - eLBC Control Register */
 	u8	res918[0xb20 - 0x918];
-	__be32	ddr1clkdr;	/* 0x.0b20 - DDR1 Clock Disable Register */
-	__be32	ddr2clkdr;	/* 0x.0b24 - DDR2 Clock Disable Register */
-	__be32	ddrclkdr;	/* 0x.0b28 - DDR Clock Disable Register */
+	u32	ddr1clkdr;	/* 0x.0b20 - DDR1 Clock Disable Register */
+	u32	ddr2clkdr;	/* 0x.0b24 - DDR2 Clock Disable Register */
+	u32	ddrclkdr;	/* 0x.0b28 - DDR Clock Disable Register */
 	u8	resb2c[0xe00 - 0xb2c];
-	__be32	clkocr;		/* 0x.0e00 - Clock Out Select Register */
+	u32	clkocr;		/* 0x.0e00 - Clock Out Select Register */
 	u8	rese04[0xe10 - 0xe04];
-	__be32	ddrdllcr;	/* 0x.0e10 - DDR DLL Control Register */
+	u32	ddrdllcr;	/* 0x.0e10 - DDR DLL Control Register */
 	u8	rese14[0xe20 - 0xe14];
-	__be32	lbcdllcr;	/* 0x.0e20 - LBC DLL Control Register */
-	__be32  cpfor;		/* 0x.0e24 - L2 charge pump fuse override register */
+	u32	lbcdllcr;	/* 0x.0e20 - LBC DLL Control Register */
+	u32	cpfor;		/* 0x.0e24 - L2 charge pump fuse override
+				 *           register
+				 */
 	u8	rese28[0xf04 - 0xe28];
-	__be32	srds1cr0;	/* 0x.0f04 - SerDes1 Control Register 0 */
-	__be32	srds1cr1;	/* 0x.0f08 - SerDes1 Control Register 0 */
+	u32	srds1cr0;	/* 0x.0f04 - SerDes1 Control Register 0 */
+	u32	srds1cr1;	/* 0x.0f08 - SerDes1 Control Register 0 */
 	u8	resf0c[0xf2c - 0xf0c];
-	__be32  itcr;		/* 0x.0f2c - Internal transaction control register */
+	u32	itcr;		/* 0x.0f2c - Internal transaction control
+				 *           register
+				 */
 	u8	resf30[0xf40 - 0xf30];
-	__be32	srds2cr0;	/* 0x.0f40 - SerDes2 Control Register 0 */
-	__be32	srds2cr1;	/* 0x.0f44 - SerDes2 Control Register 0 */
+	u32	srds2cr0;	/* 0x.0f40 - SerDes2 Control Register 0 */
+	u32	srds2cr1;	/* 0x.0f44 - SerDes2 Control Register 0 */
 } __attribute__ ((packed));
 
+u32 fsl_guts_get_svr(void);
 
 /* Alternate function signal multiplex control */
 #define MPC85xx_PMUXCR_QE(x) (0x8000 >> (x))
