These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 175 insertions, 21 deletions

diff --git a/kernel/arch/mips/lantiq/xway/reset.c b/kernel/arch/mips/lantiq/xway/reset.c
index fe68f9ae4..bc29bb349 100644
--- a/kernel/arch/mips/lantiq/xway/reset.c
+++ b/kernel/arch/mips/lantiq/xway/reset.c
@@ -4,6 +4,7 @@
  *  by the Free Software Foundation.
  *
  *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ *  Copyright (C) 2013-2015 Lantiq Beteiligungs-GmbH & Co.KG
  */
 
 #include <linux/init.h>
@@ -22,9 +23,6 @@
 
 #include "../prom.h"
 
-#define ltq_rcu_w32(x, y)	ltq_w32((x), ltq_rcu_membase + (y))
-#define ltq_rcu_r32(x)		ltq_r32(ltq_rcu_membase + (x))
-
 /* reset request register */
 #define RCU_RST_REQ		0x0010
 /* reset status register */
@@ -32,11 +30,33 @@
 /* vr9 gphy registers */
 #define RCU_GFS_ADD0_XRX200	0x0020
 #define RCU_GFS_ADD1_XRX200	0x0068
+/* xRX300 gphy registers */
+#define RCU_GFS_ADD0_XRX300	0x0020
+#define RCU_GFS_ADD1_XRX300	0x0058
+#define RCU_GFS_ADD2_XRX300	0x00AC
+/* xRX330 gphy registers */
+#define RCU_GFS_ADD0_XRX330	0x0020
+#define RCU_GFS_ADD1_XRX330	0x0058
+#define RCU_GFS_ADD2_XRX330	0x00AC
+#define RCU_GFS_ADD3_XRX330	0x0264
+
+/* xbar BE flag */
+#define RCU_AHB_ENDIAN          0x004C
+#define RCU_VR9_BE_AHB1S        0x00000008
 
 /* reboot bit */
 #define RCU_RD_GPHY0_XRX200	BIT(31)
 #define RCU_RD_SRST		BIT(30)
 #define RCU_RD_GPHY1_XRX200	BIT(29)
+/* xRX300 bits */
+#define RCU_RD_GPHY0_XRX300	BIT(31)
+#define RCU_RD_GPHY1_XRX300	BIT(29)
+#define RCU_RD_GPHY2_XRX300	BIT(28)
+/* xRX330 bits */
+#define RCU_RD_GPHY0_XRX330	BIT(31)
+#define RCU_RD_GPHY1_XRX330	BIT(29)
+#define RCU_RD_GPHY2_XRX330	BIT(28)
+#define RCU_RD_GPHY3_XRX330	BIT(10)
 
 /* reset cause */
 #define RCU_STAT_SHIFT		26
@@ -44,9 +64,60 @@
 #define RCU_BOOT_SEL(x)		((x >> 18) & 0x7)
 #define RCU_BOOT_SEL_XRX200(x)	(((x >> 17) & 0xf) | ((x >> 8) & 0x10))
 
+/* dwc2 USB configuration registers */
+#define RCU_USB1CFG		0x0018
+#define RCU_USB2CFG		0x0034
+
+/* USB DMA endianness bits */
+#define RCU_USBCFG_HDSEL_BIT	BIT(11)
+#define RCU_USBCFG_HOST_END_BIT	BIT(10)
+#define RCU_USBCFG_SLV_END_BIT	BIT(9)
+
+/* USB reset bits */
+#define RCU_USBRESET		0x0010
+
+#define USBRESET_BIT		BIT(4)
+
+#define RCU_USBRESET2		0x0048
+
+#define USB1RESET_BIT		BIT(4)
+#define USB2RESET_BIT		BIT(5)
+
+#define RCU_CFG1A		0x0038
+#define RCU_CFG1B		0x003C
+
+/* USB PMU devices */
+#define PMU_AHBM		BIT(15)
+#define PMU_USB0		BIT(6)
+#define PMU_USB1		BIT(27)
+
+/* USB PHY PMU devices */
+#define PMU_USB0_P		BIT(0)
+#define PMU_USB1_P		BIT(26)
+
 /* remapped base addr of the reset control unit */
 static void __iomem *ltq_rcu_membase;
 static struct device_node *ltq_rcu_np;
+static DEFINE_SPINLOCK(ltq_rcu_lock);
+
+static void ltq_rcu_w32(uint32_t val, uint32_t reg_off)
+{
+	ltq_w32(val, ltq_rcu_membase + reg_off);
+}
+
+static uint32_t ltq_rcu_r32(uint32_t reg_off)
+{
+	return ltq_r32(ltq_rcu_membase + reg_off);
+}
+
+static void ltq_rcu_w32_mask(uint32_t clr, uint32_t set, uint32_t reg_off)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ltq_rcu_lock, flags);
+	ltq_rcu_w32((ltq_rcu_r32(reg_off) & ~(clr)) | (set), reg_off);
+	spin_unlock_irqrestore(&ltq_rcu_lock, flags);
+}
 
 /* This function is used by the watchdog driver */
 int ltq_reset_cause(void)
@@ -67,15 +138,40 @@ unsigned char ltq_boot_select(void)
 	return RCU_BOOT_SEL(val);
 }
 
-/* reset / boot a gphy */
-static struct ltq_xrx200_gphy_reset {
+struct ltq_gphy_reset {
 	u32 rd;
 	u32 addr;
-} xrx200_gphy[] = {
+};
+
+/* reset / boot a gphy */
+static struct ltq_gphy_reset xrx200_gphy[] = {
 	{RCU_RD_GPHY0_XRX200, RCU_GFS_ADD0_XRX200},
 	{RCU_RD_GPHY1_XRX200, RCU_GFS_ADD1_XRX200},
 };
 
+/* reset / boot a gphy */
+static struct ltq_gphy_reset xrx300_gphy[] = {
+	{RCU_RD_GPHY0_XRX300, RCU_GFS_ADD0_XRX300},
+	{RCU_RD_GPHY1_XRX300, RCU_GFS_ADD1_XRX300},
+	{RCU_RD_GPHY2_XRX300, RCU_GFS_ADD2_XRX300},
+};
+
+/* reset / boot a gphy */
+static struct ltq_gphy_reset xrx330_gphy[] = {
+	{RCU_RD_GPHY0_XRX330, RCU_GFS_ADD0_XRX330},
+	{RCU_RD_GPHY1_XRX330, RCU_GFS_ADD1_XRX330},
+	{RCU_RD_GPHY2_XRX330, RCU_GFS_ADD2_XRX330},
+	{RCU_RD_GPHY3_XRX330, RCU_GFS_ADD3_XRX330},
+};
+
+static void xrx200_gphy_boot_addr(struct ltq_gphy_reset *phy_regs,
+				  dma_addr_t dev_addr)
+{
+	ltq_rcu_w32_mask(0, phy_regs->rd, RCU_RST_REQ);
+	ltq_rcu_w32(dev_addr, phy_regs->addr);
+	ltq_rcu_w32_mask(phy_regs->rd, 0,  RCU_RST_REQ);
+}
+
 /* reset and boot a gphy. these phys only exist on xrx200 SoC */
 int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr)
 {
@@ -86,23 +182,34 @@ int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr)
 		return -EINVAL;
 	}
 
-	clk = clk_get_sys("1f203000.rcu", "gphy");
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	clk_enable(clk);
-
-	if (id > 1) {
-		dev_err(dev, "%u is an invalid gphy id\n", id);
-		return -EINVAL;
+	if (of_machine_is_compatible("lantiq,vr9")) {
+		clk = clk_get_sys("1f203000.rcu", "gphy");
+		if (IS_ERR(clk))
+			return PTR_ERR(clk);
+		clk_enable(clk);
 	}
+
 	dev_info(dev, "booting GPHY%u firmware at %X\n", id, dev_addr);
 
-	ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | xrx200_gphy[id].rd,
-			RCU_RST_REQ);
-	ltq_rcu_w32(dev_addr, xrx200_gphy[id].addr);
-	ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~xrx200_gphy[id].rd,
-			RCU_RST_REQ);
+	if (of_machine_is_compatible("lantiq,vr9")) {
+		if (id >= ARRAY_SIZE(xrx200_gphy)) {
+			dev_err(dev, "%u is an invalid gphy id\n", id);
+			return -EINVAL;
+		}
+		xrx200_gphy_boot_addr(&xrx200_gphy[id], dev_addr);
+	} else if (of_machine_is_compatible("lantiq,ar10")) {
+		if (id >= ARRAY_SIZE(xrx300_gphy)) {
+			dev_err(dev, "%u is an invalid gphy id\n", id);
+			return -EINVAL;
+		}
+		xrx200_gphy_boot_addr(&xrx300_gphy[id], dev_addr);
+	} else if (of_machine_is_compatible("lantiq,grx390")) {
+		if (id >= ARRAY_SIZE(xrx330_gphy)) {
+			dev_err(dev, "%u is an invalid gphy id\n", id);
+			return -EINVAL;
+		}
+		xrx200_gphy_boot_addr(&xrx330_gphy[id], dev_addr);
+	}
 	return 0;
 }
 
@@ -200,6 +307,45 @@ static void ltq_machine_power_off(void)
 	unreachable();
 }
 
+static void ltq_usb_init(void)
+{
+	/* Power for USB cores 1 & 2 */
+	ltq_pmu_enable(PMU_AHBM);
+	ltq_pmu_enable(PMU_USB0);
+	ltq_pmu_enable(PMU_USB1);
+
+	ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1A) | BIT(0), RCU_CFG1A);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_CFG1B) | BIT(0), RCU_CFG1B);
+
+	/* Enable USB PHY power for cores 1 & 2 */
+	ltq_pmu_enable(PMU_USB0_P);
+	ltq_pmu_enable(PMU_USB1_P);
+
+	/* Configure cores to host mode */
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_HDSEL_BIT,
+		RCU_USB1CFG);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USB2CFG) & ~RCU_USBCFG_HDSEL_BIT,
+		RCU_USB2CFG);
+
+	/* Select DMA endianness (Host-endian: big-endian) */
+	ltq_rcu_w32((ltq_rcu_r32(RCU_USB1CFG) & ~RCU_USBCFG_SLV_END_BIT)
+		| RCU_USBCFG_HOST_END_BIT, RCU_USB1CFG);
+	ltq_rcu_w32(ltq_rcu_r32((RCU_USB2CFG) & ~RCU_USBCFG_SLV_END_BIT)
+		| RCU_USBCFG_HOST_END_BIT, RCU_USB2CFG);
+
+	/* Hard reset USB state machines */
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) | USBRESET_BIT, RCU_USBRESET);
+	udelay(50 * 1000);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET) & ~USBRESET_BIT, RCU_USBRESET);
+
+	/* Soft reset USB state machines */
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
+		| USB1RESET_BIT | USB2RESET_BIT, RCU_USBRESET2);
+	udelay(50 * 1000);
+	ltq_rcu_w32(ltq_rcu_r32(RCU_USBRESET2)
+		& ~(USB1RESET_BIT | USB2RESET_BIT), RCU_USBRESET2);
+}
+
 static int __init mips_reboot_setup(void)
 {
 	struct resource res;
@@ -216,13 +362,21 @@ static int __init mips_reboot_setup(void)
 	if (of_address_to_resource(ltq_rcu_np, 0, &res))
 		panic("Failed to get rcu memory range");
 
-	if (request_mem_region(res.start, resource_size(&res), res.name) < 0)
+	if (!request_mem_region(res.start, resource_size(&res), res.name))
 		pr_err("Failed to request rcu memory");
 
 	ltq_rcu_membase = ioremap_nocache(res.start, resource_size(&res));
 	if (!ltq_rcu_membase)
 		panic("Failed to remap core memory");
 
+	if (of_machine_is_compatible("lantiq,ar9") ||
+	    of_machine_is_compatible("lantiq,vr9"))
+		ltq_usb_init();
+
+	if (of_machine_is_compatible("lantiq,vr9"))
+		ltq_rcu_w32(ltq_rcu_r32(RCU_AHB_ENDIAN) | RCU_VR9_BE_AHB1S,
+			    RCU_AHB_ENDIAN);
+
 	_machine_restart = ltq_machine_restart;
 	_machine_halt = ltq_machine_halt;
 	pm_power_off = ltq_machine_power_off;