arch/arm/mach-imx/mach-imx6q.c - kernel/msm-4.9 - Gitiles

 /*
  * Copyright 2011-2013 Freescale Semiconductor, Inc.
  * Copyright 2011 Linaro Ltd.
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
  * Version 2 or later at the following locations:
  *
  * http://www.opensource.org/licenses/gpl-license.html
  * http://www.gnu.org/copyleft/gpl.html
  */

 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/clkdev.h>
 #include <linux/clocksource.h>
 #include <linux/cpu.h>
 #include <linux/delay.h>
 #include <linux/export.h>
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/opp.h>
 #include <linux/phy.h>
 #include <linux/reboot.h>
 #include <linux/regmap.h>
 #include <linux/micrel_phy.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <asm/system_misc.h>

 #include "common.h"
 #include "cpuidle.h"
 #include "hardware.h"

 static u32 chip_revision;

 int imx6q_revision(void)
 {
 	return chip_revision;
 }

 static void __init imx6q_init_revision(void)
 {
 	u32 rev = imx_anatop_get_digprog();

 	switch (rev & 0xff) {
 	case 0:
 		chip_revision = IMX_CHIP_REVISION_1_0;
 		break;
 	case 1:
 		chip_revision = IMX_CHIP_REVISION_1_1;
 		break;
 	case 2:
 		chip_revision = IMX_CHIP_REVISION_1_2;
 		break;
 	default:
 		chip_revision = IMX_CHIP_REVISION_UNKNOWN;
 	}

 	mxc_set_cpu_type(rev >> 16 & 0xff);
 }

 static void imx6q_restart(enum reboot_mode mode, const char *cmd)
 {
 	struct device_node *np;
 	void __iomem *wdog_base;

 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt");
 	wdog_base = of_iomap(np, 0);
 	if (!wdog_base)
 		goto soft;

 	imx_src_prepare_restart();

 	/* enable wdog */
 	writew_relaxed(1 << 2, wdog_base);
 	/* write twice to ensure the request will not get ignored */
 	writew_relaxed(1 << 2, wdog_base);

 	/* wait for reset to assert ... */
 	mdelay(500);

 	pr_err("Watchdog reset failed to assert reset\n");

 	/* delay to allow the serial port to show the message */
 	mdelay(50);

 soft:
 	/* we'll take a jump through zero as a poor second */
 	soft_restart(0);
 }

 /* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
 static int ksz9021rn_phy_fixup(struct phy_device *phydev)
 {
 	if (IS_BUILTIN(CONFIG_PHYLIB)) {
 		/* min rx data delay */
 		phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
 			0x8000 | MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
 		phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);

 		/* max rx/tx clock delay, min rx/tx control delay */
 		phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
 			0x8000 | MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
 		phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
 		phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
 			MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
 	}

 	return 0;
 }

 static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
 {
 	phy_write(dev, 0x0d, device);
 	phy_write(dev, 0x0e, reg);
 	phy_write(dev, 0x0d, (1 << 14) | device);
 	phy_write(dev, 0x0e, val);
 }

 static int ksz9031rn_phy_fixup(struct phy_device *dev)
 {
 	/*
 	 * min rx data delay, max rx/tx clock delay,
 	 * min rx/tx control delay
 	 */
 	mmd_write_reg(dev, 2, 4, 0);
 	mmd_write_reg(dev, 2, 5, 0);
 	mmd_write_reg(dev, 2, 8, 0x003ff);

 	return 0;
 }

 static int ar8031_phy_fixup(struct phy_device *dev)
 {
 	u16 val;

 	/* To enable AR8031 output a 125MHz clk from CLK_25M */
 	phy_write(dev, 0xd, 0x7);
 	phy_write(dev, 0xe, 0x8016);
 	phy_write(dev, 0xd, 0x4007);

 	val = phy_read(dev, 0xe);
 	val &= 0xffe3;
 	val |= 0x18;
 	phy_write(dev, 0xe, val);

 	/* introduce tx clock delay */
 	phy_write(dev, 0x1d, 0x5);
 	val = phy_read(dev, 0x1e);
 	val |= 0x0100;
 	phy_write(dev, 0x1e, val);

 	return 0;
 }

 #define PHY_ID_AR8031	0x004dd074

 static void __init imx6q_enet_phy_init(void)
 {
 	if (IS_BUILTIN(CONFIG_PHYLIB)) {
 		phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
 				ksz9021rn_phy_fixup);
 		phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
 				ksz9031rn_phy_fixup);
 		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
 				ar8031_phy_fixup);
 	}
 }

 static void __init imx6q_1588_init(void)
 {
 	struct regmap *gpr;

 	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
 	if (!IS_ERR(gpr))
 		regmap_update_bits(gpr, IOMUXC_GPR1,
 				IMX6Q_GPR1_ENET_CLK_SEL_MASK,
 				IMX6Q_GPR1_ENET_CLK_SEL_ANATOP);
 	else
 		pr_err("failed to find fsl,imx6q-iomux-gpr regmap\n");

 }

 static void __init imx6q_init_machine(void)
 {
 	imx6q_enet_phy_init();

 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);

 	imx_anatop_init();
 	imx6q_pm_init();
 	imx6q_1588_init();
 }

 #define OCOTP_CFG3			0x440
 #define OCOTP_CFG3_SPEED_SHIFT		16
 #define OCOTP_CFG3_SPEED_1P2GHZ		0x3

 static void __init imx6q_opp_check_1p2ghz(struct device *cpu_dev)
 {
 	struct device_node *np;
 	void __iomem *base;
 	u32 val;

 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp");
 	if (!np) {
 		pr_warn("failed to find ocotp node\n");
 		return;
 	}

 	base = of_iomap(np, 0);
 	if (!base) {
 		pr_warn("failed to map ocotp\n");
 		goto put_node;
 	}

 	val = readl_relaxed(base + OCOTP_CFG3);
 	val >>= OCOTP_CFG3_SPEED_SHIFT;
 	if ((val & 0x3) != OCOTP_CFG3_SPEED_1P2GHZ)
 		if (opp_disable(cpu_dev, 1200000000))
 			pr_warn("failed to disable 1.2 GHz OPP\n");

 put_node:
 	of_node_put(np);
 }

 static void __init imx6q_opp_init(void)
 {
 	struct device_node *np;
 	struct device *cpu_dev = get_cpu_device(0);

 	if (!cpu_dev) {
 		pr_warn("failed to get cpu0 device\n");
 		return;
 	}
 	np = of_node_get(cpu_dev->of_node);
 	if (!np) {
 		pr_warn("failed to find cpu0 node\n");
 		return;
 	}

 	if (of_init_opp_table(cpu_dev)) {
 		pr_warn("failed to init OPP table\n");
 		goto put_node;
 	}

 	imx6q_opp_check_1p2ghz(cpu_dev);

 put_node:
 	of_node_put(np);
 }

 static struct platform_device imx6q_cpufreq_pdev = {
 	.name = "imx6q-cpufreq",
 };

 static void __init imx6q_init_late(void)
 {
 	/*
 	 * WAIT mode is broken on TO 1.0 and 1.1, so there is no point
 	 * to run cpuidle on them.
 	 */
 	if (imx6q_revision() > IMX_CHIP_REVISION_1_1)
 		imx6q_cpuidle_init();

 	if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) {
 		imx6q_opp_init();
 		platform_device_register(&imx6q_cpufreq_pdev);
 	}
 }

 static void __init imx6q_map_io(void)
 {
 	debug_ll_io_init();
 	imx_scu_map_io();
 }

 static void __init imx6q_init_irq(void)
 {
 	imx6q_init_revision();
 	imx_init_l2cache();
 	imx_src_init();
 	imx_gpc_init();
 	irqchip_init();
 }

 static void __init imx6q_timer_init(void)
 {
 	of_clk_init(NULL);
 	clocksource_of_init();
 	imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
 			      imx6q_revision());
 }

 static const char *imx6q_dt_compat[] __initdata = {
 	"fsl,imx6dl",
 	"fsl,imx6q",
 	NULL,
 };

 DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
 	.smp		= smp_ops(imx_smp_ops),
 	.map_io		= imx6q_map_io,
 	.init_irq	= imx6q_init_irq,
 	.init_time	= imx6q_timer_init,
 	.init_machine	= imx6q_init_machine,
 	.init_late      = imx6q_init_late,
 	.dt_compat	= imx6q_dt_compat,
 	.restart	= imx6q_restart,
 MACHINE_END
	/*
	* Copyright 2011-2013 Freescale Semiconductor, Inc.
	* Copyright 2011 Linaro Ltd.
	*
	* The code contained herein is licensed under the GNU General Public
	* License. You may obtain a copy of the GNU General Public License
	* Version 2 or later at the following locations:
	*
	* http://www.opensource.org/licenses/gpl-license.html
	* http://www.gnu.org/copyleft/gpl.html
	*/

	#include <linux/clk.h>
	#include <linux/clk-provider.h>
	#include <linux/clkdev.h>
	#include <linux/clocksource.h>
	#include <linux/cpu.h>
	#include <linux/delay.h>
	#include <linux/export.h>
	#include <linux/init.h>
	#include <linux/io.h>
	#include <linux/irq.h>
	#include <linux/irqchip.h>
	#include <linux/of.h>
	#include <linux/of_address.h>
	#include <linux/of_irq.h>
	#include <linux/of_platform.h>
	#include <linux/opp.h>
	#include <linux/phy.h>
	#include <linux/reboot.h>
	#include <linux/regmap.h>
	#include <linux/micrel_phy.h>
	#include <linux/mfd/syscon.h>
	#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
	#include <asm/mach/arch.h>
	#include <asm/mach/map.h>
	#include <asm/system_misc.h>

	#include "common.h"
	#include "cpuidle.h"
	#include "hardware.h"

	static u32 chip_revision;

	int imx6q_revision(void)
	{
	return chip_revision;
	}

	static void __init imx6q_init_revision(void)
	{
	u32 rev = imx_anatop_get_digprog();

	switch (rev & 0xff) {
	case 0:
	chip_revision = IMX_CHIP_REVISION_1_0;
	break;
	case 1:
	chip_revision = IMX_CHIP_REVISION_1_1;
	break;
	case 2:
	chip_revision = IMX_CHIP_REVISION_1_2;
	break;
	default:
	chip_revision = IMX_CHIP_REVISION_UNKNOWN;
	}

	mxc_set_cpu_type(rev >> 16 & 0xff);
	}

	static void imx6q_restart(enum reboot_mode mode, const char *cmd)
	{
	struct device_node *np;
	void __iomem *wdog_base;

	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt");
	wdog_base = of_iomap(np, 0);
	if (!wdog_base)
	goto soft;

	imx_src_prepare_restart();

	/* enable wdog */
	writew_relaxed(1 << 2, wdog_base);
	/* write twice to ensure the request will not get ignored */
	writew_relaxed(1 << 2, wdog_base);

	/* wait for reset to assert ... */
	mdelay(500);

	pr_err("Watchdog reset failed to assert reset\n");

	/* delay to allow the serial port to show the message */
	mdelay(50);

	soft:
	/* we'll take a jump through zero as a poor second */
	soft_restart(0);
	}

	/* For imx6q sabrelite board: set KSZ9021RN RGMII pad skew */
	static int ksz9021rn_phy_fixup(struct phy_device *phydev)
	{
	if (IS_BUILTIN(CONFIG_PHYLIB)) {
	/* min rx data delay */
	phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
	0x8000 \| MICREL_KSZ9021_RGMII_RX_DATA_PAD_SCEW);
	phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0x0000);

	/* max rx/tx clock delay, min rx/tx control delay */
	phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
	0x8000 \| MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
	phy_write(phydev, MICREL_KSZ9021_EXTREG_DATA_WRITE, 0xf0f0);
	phy_write(phydev, MICREL_KSZ9021_EXTREG_CTRL,
	MICREL_KSZ9021_RGMII_CLK_CTRL_PAD_SCEW);
	}

	return 0;
	}

	static void mmd_write_reg(struct phy_device *dev, int device, int reg, int val)
	{
	phy_write(dev, 0x0d, device);
	phy_write(dev, 0x0e, reg);
	phy_write(dev, 0x0d, (1 << 14) \| device);
	phy_write(dev, 0x0e, val);
	}

	static int ksz9031rn_phy_fixup(struct phy_device *dev)
	{
	/*
	* min rx data delay, max rx/tx clock delay,
	* min rx/tx control delay
	*/
	mmd_write_reg(dev, 2, 4, 0);
	mmd_write_reg(dev, 2, 5, 0);
	mmd_write_reg(dev, 2, 8, 0x003ff);

	return 0;
	}

	static int ar8031_phy_fixup(struct phy_device *dev)
	{
	u16 val;

	/* To enable AR8031 output a 125MHz clk from CLK_25M */
	phy_write(dev, 0xd, 0x7);
	phy_write(dev, 0xe, 0x8016);
	phy_write(dev, 0xd, 0x4007);

	val = phy_read(dev, 0xe);
	val &= 0xffe3;
	val \|= 0x18;
	phy_write(dev, 0xe, val);

	/* introduce tx clock delay */
	phy_write(dev, 0x1d, 0x5);
	val = phy_read(dev, 0x1e);
	val \|= 0x0100;
	phy_write(dev, 0x1e, val);

	return 0;
	}

	#define PHY_ID_AR8031 0x004dd074

	static void __init imx6q_enet_phy_init(void)
	{
	if (IS_BUILTIN(CONFIG_PHYLIB)) {
	phy_register_fixup_for_uid(PHY_ID_KSZ9021, MICREL_PHY_ID_MASK,
	ksz9021rn_phy_fixup);
	phy_register_fixup_for_uid(PHY_ID_KSZ9031, MICREL_PHY_ID_MASK,
	ksz9031rn_phy_fixup);
	phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
	ar8031_phy_fixup);
	}
	}

	static void __init imx6q_1588_init(void)
	{
	struct regmap *gpr;

	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
	if (!IS_ERR(gpr))
	regmap_update_bits(gpr, IOMUXC_GPR1,
	IMX6Q_GPR1_ENET_CLK_SEL_MASK,
	IMX6Q_GPR1_ENET_CLK_SEL_ANATOP);
	else
	pr_err("failed to find fsl,imx6q-iomux-gpr regmap\n");

	}

	static void __init imx6q_init_machine(void)
	{
	imx6q_enet_phy_init();

	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);

	imx_anatop_init();
	imx6q_pm_init();
	imx6q_1588_init();
	}

	#define OCOTP_CFG3 0x440
	#define OCOTP_CFG3_SPEED_SHIFT 16
	#define OCOTP_CFG3_SPEED_1P2GHZ 0x3

	static void __init imx6q_opp_check_1p2ghz(struct device *cpu_dev)
	{
	struct device_node *np;
	void __iomem *base;
	u32 val;

	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp");
	if (!np) {
	pr_warn("failed to find ocotp node\n");
	return;
	}

	base = of_iomap(np, 0);
	if (!base) {
	pr_warn("failed to map ocotp\n");
	goto put_node;
	}

	val = readl_relaxed(base + OCOTP_CFG3);
	val >>= OCOTP_CFG3_SPEED_SHIFT;
	if ((val & 0x3) != OCOTP_CFG3_SPEED_1P2GHZ)
	if (opp_disable(cpu_dev, 1200000000))
	pr_warn("failed to disable 1.2 GHz OPP\n");

	put_node:
	of_node_put(np);
	}

	static void __init imx6q_opp_init(void)
	{
	struct device_node *np;
	struct device *cpu_dev = get_cpu_device(0);

	if (!cpu_dev) {
	pr_warn("failed to get cpu0 device\n");
	return;
	}
	np = of_node_get(cpu_dev->of_node);
	if (!np) {
	pr_warn("failed to find cpu0 node\n");
	return;
	}

	if (of_init_opp_table(cpu_dev)) {
	pr_warn("failed to init OPP table\n");
	goto put_node;
	}

	imx6q_opp_check_1p2ghz(cpu_dev);

	put_node:
	of_node_put(np);
	}

	static struct platform_device imx6q_cpufreq_pdev = {
	.name = "imx6q-cpufreq",
	};

	static void __init imx6q_init_late(void)
	{
	/*
	* WAIT mode is broken on TO 1.0 and 1.1, so there is no point
	* to run cpuidle on them.
	*/
	if (imx6q_revision() > IMX_CHIP_REVISION_1_1)
	imx6q_cpuidle_init();

	if (IS_ENABLED(CONFIG_ARM_IMX6Q_CPUFREQ)) {
	imx6q_opp_init();
	platform_device_register(&imx6q_cpufreq_pdev);
	}
	}

	static void __init imx6q_map_io(void)
	{
	debug_ll_io_init();
	imx_scu_map_io();
	}

	static void __init imx6q_init_irq(void)
	{
	imx6q_init_revision();
	imx_init_l2cache();
	imx_src_init();
	imx_gpc_init();
	irqchip_init();
	}

	static void __init imx6q_timer_init(void)
	{
	of_clk_init(NULL);
	clocksource_of_init();
	imx_print_silicon_rev(cpu_is_imx6dl() ? "i.MX6DL" : "i.MX6Q",
	imx6q_revision());
	}

	static const char *imx6q_dt_compat[] __initdata = {
	"fsl,imx6dl",
	"fsl,imx6q",
	NULL,
	};

	DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad/DualLite (Device Tree)")
	.smp = smp_ops(imx_smp_ops),
	.map_io = imx6q_map_io,
	.init_irq = imx6q_init_irq,
	.init_time = imx6q_timer_init,
	.init_machine = imx6q_init_machine,
	.init_late = imx6q_init_late,
	.dt_compat = imx6q_dt_compat,
	.restart = imx6q_restart,
	MACHINE_END