ipq806x: Add support for linux-4.4

1)Changes

- Rebased the patches for linux-4.4.7
- Added patch to fix spi nor fifo and dma support
- Added patch to configure watchdog barktime

2)Testing

Tested on IPQ AP148 Board:
 a. NOR boot and NAND boot
 b. ethernet network and ath10k wifi
 c. ubi sysupgrade

UnTested
 dwc3 usb has not been validated on IPQ board(AP148)

3)Known Issues:
 Once we flash ubi image on AP148, and if we reset the board, uboot on
 first boot creates PEB and LEB for dynamic sized partitions, which is incorrect
 and not what linux expects which causes errors when trying to mount rootfs.
 In order to test this, we can use the below steps:
  a. Flash the ubi image on board and don't reset the board
  b. load the kernel fit image in RAM and boot from there.

Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>

1 files changed, 510 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-4.4/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch b/target/linux/ipq806x/patches-4.4/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch
new file mode 100644
index 0000000000..68f2b39813
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/100-usb-phy-Add-Qualcomm-DWC3-HS-SS-PHY-drivers.patch
@@ -0,0 +1,510 @@
+--- a/drivers/phy/Kconfig
++++ b/drivers/phy/Kconfig
+@@ -390,4 +390,15 @@
+	  Enable this to support the Broadcom Cygnus PCIe PHY.
+	  If unsure, say N.
+ 
++config PHY_QCOM_DWC3
++	tristate "QCOM DWC3 USB PHY support"
++	depends on ARCH_QCOM
++	depends on HAS_IOMEM
++	depends on OF
++	select GENERIC_PHY
++	help
++	  This option enables support for the Synopsis PHYs present inside the
++	  Qualcomm USB3.0 DWC3 controller.  This driver supports both HS and SS
++	  PHY controllers.
++
+ endmenu
+--- a/drivers/phy/Makefile
++++ b/drivers/phy/Makefile
+@@ -48,3 +48,4 @@ obj-$(CONFIG_PHY_TUSB1210)	+=
+ obj-$(CONFIG_PHY_BRCMSTB_SATA)		+= phy-brcmstb-sata.o
+ obj-$(CONFIG_PHY_PISTACHIO_USB)		+= phy-pistachio-usb.o
+ obj-$(CONFIG_PHY_CYGNUS_PCIE)		+= phy-bcm-cygnus-pcie.o
++obj-$(CONFIG_PHY_QCOM_DWC3)		+= phy-qcom-dwc3.o
+--- /dev/null
++++ b/drivers/phy/phy-qcom-dwc3.c
+@@ -0,0 +1,482 @@
++/* Copyright (c) 2013-2014, Code Aurora Forum. All rights reserved.
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only 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/clk.h>
++#include <linux/err.h>
++#include <linux/io.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/phy/phy.h>
++#include <linux/platform_device.h>
++#include <linux/delay.h>
++
++/**
++ *  USB QSCRATCH Hardware registers
++ */
++#define QSCRATCH_GENERAL_CFG		(0x08)
++#define HSUSB_PHY_CTRL_REG		(0x10)
++
++/* PHY_CTRL_REG */
++#define HSUSB_CTRL_DMSEHV_CLAMP			BIT(24)
++#define HSUSB_CTRL_USB2_SUSPEND			BIT(23)
++#define HSUSB_CTRL_UTMI_CLK_EN			BIT(21)
++#define	HSUSB_CTRL_UTMI_OTG_VBUS_VALID		BIT(20)
++#define HSUSB_CTRL_USE_CLKCORE			BIT(18)
++#define HSUSB_CTRL_DPSEHV_CLAMP			BIT(17)
++#define HSUSB_CTRL_COMMONONN			BIT(11)
++#define HSUSB_CTRL_ID_HV_CLAMP			BIT(9)
++#define HSUSB_CTRL_OTGSESSVLD_CLAMP		BIT(8)
++#define HSUSB_CTRL_CLAMP_EN			BIT(7)
++#define HSUSB_CTRL_RETENABLEN			BIT(1)
++#define HSUSB_CTRL_POR				BIT(0)
++
++/* QSCRATCH_GENERAL_CFG */
++#define HSUSB_GCFG_XHCI_REV		BIT(2)
++
++/**
++ *  USB QSCRATCH Hardware registers
++ */
++#define SSUSB_PHY_CTRL_REG		(0x00)
++#define SSUSB_PHY_PARAM_CTRL_1		(0x04)
++#define SSUSB_PHY_PARAM_CTRL_2		(0x08)
++#define CR_PROTOCOL_DATA_IN_REG		(0x0c)
++#define CR_PROTOCOL_DATA_OUT_REG	(0x10)
++#define CR_PROTOCOL_CAP_ADDR_REG	(0x14)
++#define CR_PROTOCOL_CAP_DATA_REG	(0x18)
++#define CR_PROTOCOL_READ_REG		(0x1c)
++#define CR_PROTOCOL_WRITE_REG		(0x20)
++
++/* PHY_CTRL_REG */
++#define SSUSB_CTRL_REF_USE_PAD		BIT(28)
++#define SSUSB_CTRL_TEST_POWERDOWN	BIT(27)
++#define SSUSB_CTRL_LANE0_PWR_PRESENT	BIT(24)
++#define SSUSB_CTRL_SS_PHY_EN		BIT(8)
++#define SSUSB_CTRL_SS_PHY_RESET		BIT(7)
++
++/* SSPHY control registers */
++#define SSPHY_CTRL_RX_OVRD_IN_HI(lane)	(0x1006 + 0x100 * lane)
++#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane)	(0x1002 + 0x100 * lane)
++
++/* RX OVRD IN HI bits */
++#define RX_OVRD_IN_HI_RX_RESET_OVRD		BIT(13)
++#define RX_OVRD_IN_HI_RX_RX_RESET		BIT(12)
++#define RX_OVRD_IN_HI_RX_EQ_OVRD		BIT(11)
++#define RX_OVRD_IN_HI_RX_EQ_MASK		0x0700
++#define RX_OVRD_IN_HI_RX_EQ_SHIFT		8
++#define RX_OVRD_IN_HI_RX_EQ_EN_OVRD		BIT(7)
++#define RX_OVRD_IN_HI_RX_EQ_EN			BIT(6)
++#define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD	BIT(5)
++#define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK	0x0018
++#define RX_OVRD_IN_HI_RX_RATE_OVRD		BIT(2)
++#define RX_OVRD_IN_HI_RX_RATE_MASK		0x0003
++
++/* TX OVRD DRV LO register bits */
++#define TX_OVRD_DRV_LO_AMPLITUDE_MASK	0x007F
++#define TX_OVRD_DRV_LO_PREEMPH_MASK	0x3F80
++#define TX_OVRD_DRV_LO_PREEMPH_SHIFT	7
++#define TX_OVRD_DRV_LO_EN		BIT(14)
++
++struct qcom_dwc3_usb_phy {
++	void __iomem		*base;
++	struct device		*dev;
++	struct phy *phy;
++
++	int (*phy_init)(struct qcom_dwc3_usb_phy *phy_dwc3);
++	int (*phy_exit)(struct qcom_dwc3_usb_phy *phy_dwc3);
++
++	struct clk		*xo_clk;
++	struct clk		*ref_clk;
++};
++
++/**
++ * Write register and read back masked value to confirm it is written
++ *
++ * @base - QCOM DWC3 PHY base virtual address.
++ * @offset - register offset.
++ * @mask - register bitmask specifying what should be updated
++ * @val - value to write.
++ */
++static inline void qcom_dwc3_phy_write_readback(
++	struct qcom_dwc3_usb_phy *phy_dwc3, u32 offset,
++	const u32 mask, u32 val)
++{
++	u32 write_val, tmp = readl(phy_dwc3->base + offset);
++
++	tmp &= ~mask;		/* retain other bits */
++	write_val = tmp | val;
++
++	writel(write_val, phy_dwc3->base + offset);
++
++	/* Read back to see if val was written */
++	tmp = readl(phy_dwc3->base + offset);
++	tmp &= mask;		/* clear other bits */
++
++	if (tmp != val)
++		dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n",
++			val, offset);
++}
++
++static int wait_for_latch(void __iomem *addr)
++{
++	u32 retry = 10;
++
++	while (true) {
++		if (!readl(addr))
++			break;
++
++		if (--retry == 0)
++			return -ETIMEDOUT;
++
++		usleep_range(10, 20);
++	}
++
++	return 0;
++}
++
++/**
++ * Write SSPHY register
++ *
++ * @base - QCOM DWC3 PHY base virtual address.
++ * @addr - SSPHY address to write.
++ * @val - value to write.
++ */
++static int qcom_dwc3_ss_write_phycreg(void __iomem *base, u32 addr, u32 val)
++{
++	int ret;
++
++	writel(addr, base + CR_PROTOCOL_DATA_IN_REG);
++	writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG);
++
++	ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG);
++	if (ret)
++		goto err_wait;
++
++	writel(val, base + CR_PROTOCOL_DATA_IN_REG);
++	writel(0x1, base + CR_PROTOCOL_CAP_DATA_REG);
++
++	ret = wait_for_latch(base + CR_PROTOCOL_CAP_DATA_REG);
++	if (ret)
++		goto err_wait;
++
++	writel(0x1, base + CR_PROTOCOL_WRITE_REG);
++
++	ret = wait_for_latch(base + CR_PROTOCOL_WRITE_REG);
++
++err_wait:
++	return ret;
++}
++
++/**
++ * Read SSPHY register.
++ *
++ * @base - QCOM DWC3 PHY base virtual address.
++ * @addr - SSPHY address to read.
++ */
++static int qcom_dwc3_ss_read_phycreg(void __iomem *base, u32 addr, u32 *val)
++{
++	int ret;
++	bool first_read = true;
++
++	writel(addr, base + CR_PROTOCOL_DATA_IN_REG);
++	writel(0x1, base + CR_PROTOCOL_CAP_ADDR_REG);
++
++	ret = wait_for_latch(base + CR_PROTOCOL_CAP_ADDR_REG);
++	if (ret)
++		goto err_wait;
++
++	/*
++	 * Due to hardware bug, first read of SSPHY register might be
++	 * incorrect. Hence as workaround, SW should perform SSPHY register
++	 * read twice, but use only second read and ignore first read.
++	 */
++retry:
++	writel(0x1, base + CR_PROTOCOL_READ_REG);
++
++	ret = wait_for_latch(base + CR_PROTOCOL_READ_REG);
++	if (ret)
++		goto err_wait;
++
++	if (first_read) {
++		readl(base + CR_PROTOCOL_DATA_OUT_REG);
++		first_read = false;
++		goto retry;
++	}
++
++	*val = readl(base + CR_PROTOCOL_DATA_OUT_REG);
++
++err_wait:
++	return ret;
++}
++
++static int qcom_dwc3_phy_power_on(struct phy *phy)
++{
++	int ret;
++	struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
++
++	ret = clk_prepare_enable(phy_dwc3->xo_clk);
++	if (ret)
++		return ret;
++
++	ret = clk_prepare_enable(phy_dwc3->ref_clk);
++	if (ret)
++		clk_disable_unprepare(phy_dwc3->xo_clk);
++
++	return ret;
++}
++
++static int qcom_dwc3_phy_power_off(struct phy *phy)
++{
++	struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
++
++	clk_disable_unprepare(phy_dwc3->ref_clk);
++	clk_disable_unprepare(phy_dwc3->xo_clk);
++
++	return 0;
++}
++
++static int qcom_dwc3_hs_phy_init(struct qcom_dwc3_usb_phy *phy_dwc3)
++{
++	u32 val;
++
++	/*
++	 * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
++	 * enable clamping, and disable RETENTION (power-on default is ENABLED)
++	 */
++	val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
++		HSUSB_CTRL_RETENABLEN  | HSUSB_CTRL_COMMONONN |
++		HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
++		HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID |
++		HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70;
++
++	/* use core clock if external reference is not present */
++	if (!phy_dwc3->xo_clk)
++		val |= HSUSB_CTRL_USE_CLKCORE;
++
++	writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG);
++	usleep_range(2000, 2200);
++
++	/* Disable (bypass) VBUS and ID filters */
++	writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG);
++
++	return 0;
++}
++
++static int qcom_dwc3_ss_phy_init(struct qcom_dwc3_usb_phy *phy_dwc3)
++{
++	int ret;
++	u32 data = 0;
++
++	/* reset phy */
++	data = readl_relaxed(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++	writel_relaxed(data | SSUSB_CTRL_SS_PHY_RESET,
++		phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++	usleep_range(2000, 2200);
++	writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++
++	/* clear REF_PAD if we don't have XO clk */
++	if (!phy_dwc3->xo_clk)
++		data &= ~SSUSB_CTRL_REF_USE_PAD;
++	else
++		data |= SSUSB_CTRL_REF_USE_PAD;
++
++	writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++	msleep(30);
++
++	data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
++	writel_relaxed(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
++
++	/*
++	 * Fix RX Equalization setting as follows
++	 * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
++	 * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
++	 * LANE0.RX_OVRD_IN_HI.RX_EQ set to 3
++	 * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
++	 */
++	ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
++			SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
++	if (ret)
++		goto err_phy_trans;
++
++	data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
++	data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
++	data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
++	data |= 0x3 << RX_OVRD_IN_HI_RX_EQ_SHIFT;
++	data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
++	ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base,
++		SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
++	if (ret)
++		goto err_phy_trans;
++
++	/*
++	 * Set EQ and TX launch amplitudes as follows
++	 * LANE0.TX_OVRD_DRV_LO.PREEMPH set to 22
++	 * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 127
++	 * LANE0.TX_OVRD_DRV_LO.EN set to 1.
++	 */
++	ret = qcom_dwc3_ss_read_phycreg(phy_dwc3->base,
++		SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
++	if (ret)
++		goto err_phy_trans;
++
++	data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
++	data |= 0x16 << TX_OVRD_DRV_LO_PREEMPH_SHIFT;
++	data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
++	data |= 0x7f;
++	data |= TX_OVRD_DRV_LO_EN;
++	ret = qcom_dwc3_ss_write_phycreg(phy_dwc3->base,
++		SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
++	if (ret)
++		goto err_phy_trans;
++
++	/*
++	 * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
++	 * TX_FULL_SWING [26:20] amplitude to 127
++	 * TX_DEEMPH_3_5DB [13:8] to 22
++	 * LOS_BIAS [2:0] to 0x5
++	 */
++	qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
++				   0x07f03f07, 0x07f01605);
++
++err_phy_trans:
++	return ret;
++}
++
++static int qcom_dwc3_ss_phy_exit(struct qcom_dwc3_usb_phy *phy_dwc3)
++{
++	/* Sequence to put SSPHY in low power state:
++	 * 1. Clear REF_PHY_EN in PHY_CTRL_REG
++	 * 2. Clear REF_USE_PAD in PHY_CTRL_REG
++	 * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
++	 * 4. Disable SSPHY ref clk
++	 */
++	qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
++		SSUSB_CTRL_SS_PHY_EN, 0x0);
++	qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
++		SSUSB_CTRL_REF_USE_PAD, 0x0);
++	qcom_dwc3_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
++		0x0, SSUSB_CTRL_TEST_POWERDOWN);
++
++	return 0;
++}
++
++static int qcom_dwc3_phy_init(struct phy *phy)
++{
++	struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
++
++	if (phy_dwc3->phy_init)
++		return phy_dwc3->phy_init(phy_dwc3);
++
++	return 0;
++}
++
++static int qcom_dwc3_phy_exit(struct phy *phy)
++{
++	struct qcom_dwc3_usb_phy *phy_dwc3 = phy_get_drvdata(phy);
++
++	if (phy_dwc3->phy_exit)
++		return qcom_dwc3_ss_phy_exit(phy_dwc3);
++
++	return 0;
++}
++
++static struct phy_ops qcom_dwc3_phy_ops = {
++	.init		= qcom_dwc3_phy_init,
++	.exit		= qcom_dwc3_phy_exit,
++	.power_on	= qcom_dwc3_phy_power_on,
++	.power_off	= qcom_dwc3_phy_power_off,
++	.owner		= THIS_MODULE,
++};
++
++static const struct of_device_id qcom_dwc3_phy_table[] = {
++	{ .compatible = "qcom,dwc3-hs-usb-phy", },
++	{ .compatible = "qcom,dwc3-ss-usb-phy", },
++	{ /* Sentinel */ }
++};
++MODULE_DEVICE_TABLE(of, qcom_dwc3_phy_table);
++
++static int qcom_dwc3_phy_probe(struct platform_device *pdev)
++{
++	struct qcom_dwc3_usb_phy	*phy_dwc3;
++	struct phy_provider		*phy_provider;
++	struct resource			*res;
++
++	phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
++	if (!phy_dwc3)
++		return -ENOMEM;
++
++	platform_set_drvdata(pdev, phy_dwc3);
++
++	phy_dwc3->dev = &pdev->dev;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	phy_dwc3->base = devm_ioremap_resource(phy_dwc3->dev, res);
++	if (IS_ERR(phy_dwc3->base))
++		return PTR_ERR(phy_dwc3->base);
++
++	phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
++	if (IS_ERR(phy_dwc3->ref_clk)) {
++		dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
++		return PTR_ERR(phy_dwc3->ref_clk);
++	}
++
++	if (of_device_is_compatible(pdev->dev.of_node,
++			"qcom,dwc3-hs-usb-phy")) {
++		clk_set_rate(phy_dwc3->ref_clk, 60000000);
++		phy_dwc3->phy_init = qcom_dwc3_hs_phy_init;
++	} else if (of_device_is_compatible(pdev->dev.of_node,
++			"qcom,dwc3-ss-usb-phy")) {
++		phy_dwc3->phy_init = qcom_dwc3_ss_phy_init;
++		phy_dwc3->phy_exit = qcom_dwc3_ss_phy_exit;
++		clk_set_rate(phy_dwc3->ref_clk, 125000000);
++	} else {
++		dev_err(phy_dwc3->dev, "Unknown phy\n");
++		return -EINVAL;
++	}
++
++	phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo");
++	if (IS_ERR(phy_dwc3->xo_clk)) {
++		dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n");
++		phy_dwc3->xo_clk = NULL;
++	}
++
++	phy_dwc3->phy = devm_phy_create(phy_dwc3->dev, NULL, &qcom_dwc3_phy_ops);
++
++	if (IS_ERR(phy_dwc3->phy))
++		return PTR_ERR(phy_dwc3->phy);
++
++	phy_set_drvdata(phy_dwc3->phy, phy_dwc3);
++
++	phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
++			of_phy_simple_xlate);
++
++	if (IS_ERR(phy_provider))
++		return PTR_ERR(phy_provider);
++
++	return 0;
++}
++
++static struct platform_driver qcom_dwc3_phy_driver = {
++	.probe		= qcom_dwc3_phy_probe,
++	.driver		= {
++		.name	= "qcom-dwc3-usb-phy",
++		.owner	= THIS_MODULE,
++		.of_match_table = qcom_dwc3_phy_table,
++	},
++};
++
++module_platform_driver(qcom_dwc3_phy_driver);
++
++MODULE_ALIAS("platform:phy-qcom-dwc3");
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
++MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
++MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");