openwrt/target/linux/ramips/patches-3.8/0204-owrt-MIPS-ralink-add-usb-platform-support.patch

From d7e679017ec92824145b275572f6ef83d461f076 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Tue, 19 Mar 2013 09:26:22 +0100
Subject: [PATCH 204/208] owrt: MIPS: ralink: add usb platform support

Add code to load the platform ehci/ohci driver on Ralink SoC. For the usb core
to work we need to populate the platform_data during boot, prior to the usb
driver being loaded.

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 arch/mips/ralink/Makefile     |    4 +-
 arch/mips/ralink/common.h     |    1 +
 arch/mips/ralink/mt7620.c     |    5 ++
 arch/mips/ralink/of.c         |    1 +
 arch/mips/ralink/rt305x-usb.c |  120 +++++++++++++++++++++++++++++++++++++++++
 arch/mips/ralink/rt3883-usb.c |  118 ++++++++++++++++++++++++++++++++++++++++
 6 files changed, 247 insertions(+), 2 deletions(-)
 create mode 100644 arch/mips/ralink/rt305x-usb.c
 create mode 100644 arch/mips/ralink/rt3883-usb.c

--- a/arch/mips/ralink/Makefile
+++ b/arch/mips/ralink/Makefile
@@ -9,8 +9,8 @@
 obj-y := prom.o of.o reset.o clk.o irq.o pinmux.o timer.o
 
 obj-$(CONFIG_SOC_RT288X) += rt288x.o
-obj-$(CONFIG_SOC_RT305X) += rt305x.o
-obj-$(CONFIG_SOC_RT3883) += rt3883.o
+obj-$(CONFIG_SOC_RT305X) += rt305x.o rt305x-usb.o
+obj-$(CONFIG_SOC_RT3883) += rt3883.o rt3883-usb.o
 obj-$(CONFIG_SOC_MT7620) += mt7620.o
 
 obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
--- a/arch/mips/ralink/common.h
+++ b/arch/mips/ralink/common.h
@@ -51,5 +51,6 @@ extern void prom_soc_init(struct ralink_
 __iomem void *plat_of_remap_node(const char *node);
 
 void ralink_pinmux(void);
+void ralink_usb_platform(void);
 
 #endif /* _RALINK_COMMON_H__ */
--- a/arch/mips/ralink/mt7620.c
+++ b/arch/mips/ralink/mt7620.c
@@ -140,6 +140,11 @@ struct ralink_pinmux rt_gpio_pinmux = {
 	.uart_mask = MT7620_GPIO_MODE_GPIO,
 };
 
+void ralink_usb_platform(void)
+{
+
+}
+
 void __init ralink_clk_init(void)
 {
 	unsigned long cpu_rate, sys_rate;
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -111,6 +111,7 @@ static int __init plat_of_setup(void)
 		panic("failed to populate DT\n");
 
 	ralink_pinmux();
+	ralink_usb_platform();
 
 	return 0;
 }
--- /dev/null
+++ b/arch/mips/ralink/rt305x-usb.c
@@ -0,0 +1,120 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/delay.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/ehci_pdriver.h>
+#include <linux/usb/ohci_pdriver.h>
+
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt305x.h>
+
+static atomic_t rt3352_usb_pwr_ref = ATOMIC_INIT(0);
+
+static int rt3352_usb_power_on(struct platform_device *pdev)
+{
+
+	if (atomic_inc_return(&rt3352_usb_pwr_ref) == 1) {
+		u32 t;
+
+		t = rt_sysc_r32(RT3352_SYSC_REG_USB_PS);
+
+		/* enable clock for port0's and port1's phys */
+		t = rt_sysc_r32(RT3352_SYSC_REG_CLKCFG1);
+		t |= RT3352_CLKCFG1_UPHY0_CLK_EN | RT3352_CLKCFG1_UPHY1_CLK_EN;
+		rt_sysc_w32(t, RT3352_SYSC_REG_CLKCFG1);
+		mdelay(500);
+
+		/* pull USBHOST and USBDEV out from reset */
+		t = rt_sysc_r32(RT3352_SYSC_REG_RSTCTRL);
+		t &= ~(RT3352_RSTCTRL_UHST | RT3352_RSTCTRL_UDEV);
+		rt_sysc_w32(t, RT3352_SYSC_REG_RSTCTRL);
+		mdelay(500);
+
+		/* enable host mode */
+		t = rt_sysc_r32(RT3352_SYSC_REG_SYSCFG1);
+		t |= RT3352_SYSCFG1_USB0_HOST_MODE;
+		rt_sysc_w32(t, RT3352_SYSC_REG_SYSCFG1);
+
+		t = rt_sysc_r32(RT3352_SYSC_REG_USB_PS);
+	}
+
+	return 0;
+}
+
+static void rt3352_usb_power_off(struct platform_device *pdev)
+{
+	if (atomic_dec_return(&rt3352_usb_pwr_ref) == 0) {
+		u32 t;
+
+		/* put USBHOST and USBDEV into reset */
+		t = rt_sysc_r32(RT3352_SYSC_REG_RSTCTRL);
+		t |= RT3352_RSTCTRL_UHST | RT3352_RSTCTRL_UDEV;
+		rt_sysc_w32(t, RT3352_SYSC_REG_RSTCTRL);
+		udelay(10000);
+
+		/* disable clock for port0's and port1's phys*/
+		t = rt_sysc_r32(RT3352_SYSC_REG_CLKCFG1);
+		t &= ~(RT3352_CLKCFG1_UPHY0_CLK_EN | RT3352_CLKCFG1_UPHY1_CLK_EN);
+		rt_sysc_w32(t, RT3352_SYSC_REG_CLKCFG1);
+		udelay(10000);
+	}
+}
+
+static struct usb_ehci_pdata rt3352_ehci_data = {
+	.power_on	= rt3352_usb_power_on,
+	.power_off	= rt3352_usb_power_off,
+};
+
+static struct usb_ohci_pdata rt3352_ohci_data = {
+	.power_on	= rt3352_usb_power_on,
+	.power_off	= rt3352_usb_power_off,
+};
+
+static void ralink_add_usb(char *name, void *pdata, u64 *mask)
+{
+	struct device_node *node;
+	struct platform_device *pdev;
+
+	node = of_find_compatible_node(NULL, NULL, name);
+	if (!node)
+		return;
+
+	pdev = of_find_device_by_node(node);
+	if (!pdev)
+		goto error_out;
+
+	if (pdata)
+		pdev->dev.platform_data = pdata;
+	if (mask) {
+		pdev->dev.dma_mask = mask;
+		pdev->dev.coherent_dma_mask = *mask;
+	}
+
+error_out:
+	of_node_put(node);
+}
+
+static u64 rt3352_ohci_dmamask = DMA_BIT_MASK(32);
+static u64 rt3352_ehci_dmamask = DMA_BIT_MASK(32);
+
+void ralink_usb_platform(void)
+{
+	if (soc_is_rt3352() || soc_is_rt5350()) {
+		ralink_add_usb("ohci-platform",
+				&rt3352_ohci_data, &rt3352_ohci_dmamask);
+		ralink_add_usb("ehci-platform",
+				&rt3352_ehci_data, &rt3352_ehci_dmamask);
+	}
+}
--- /dev/null
+++ b/arch/mips/ralink/rt3883-usb.c
@@ -0,0 +1,118 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <linux/delay.h>
+#include <linux/of_platform.h>
+#include <linux/dma-mapping.h>
+#include <linux/usb/ehci_pdriver.h>
+#include <linux/usb/ohci_pdriver.h>
+
+#include <asm/mach-ralink/ralink_regs.h>
+#include <asm/mach-ralink/rt3883.h>
+
+static atomic_t rt3883_usb_pwr_ref = ATOMIC_INIT(0);
+
+static int rt3883_usb_power_on(struct platform_device *pdev)
+{
+	if (atomic_inc_return(&rt3883_usb_pwr_ref) == 1) {
+		u32 t;
+
+		t = rt_sysc_r32(RT3883_SYSC_REG_USB_PS);
+
+		/* enable clock for port0's and port1's phys */
+		t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
+		t |= RT3883_CLKCFG1_UPHY0_CLK_EN | RT3883_CLKCFG1_UPHY1_CLK_EN;
+		rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
+		mdelay(500);
+
+		/* pull USBHOST and USBDEV out from reset */
+		t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
+		t &= ~(RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV);
+		rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
+		mdelay(500);
+
+		/* enable host mode */
+		t = rt_sysc_r32(RT3883_SYSC_REG_SYSCFG1);
+		t |= RT3883_SYSCFG1_USB0_HOST_MODE;
+		rt_sysc_w32(t, RT3883_SYSC_REG_SYSCFG1);
+
+		t = rt_sysc_r32(RT3883_SYSC_REG_USB_PS);
+	}
+
+	return 0;
+}
+
+static void rt3883_usb_power_off(struct platform_device *pdev)
+{
+	if (atomic_dec_return(&rt3883_usb_pwr_ref) == 0) {
+		u32 t;
+
+		/* put USBHOST and USBDEV into reset */
+		t = rt_sysc_r32(RT3883_SYSC_REG_RSTCTRL);
+		t |= RT3883_RSTCTRL_UHST | RT3883_RSTCTRL_UDEV;
+		rt_sysc_w32(t, RT3883_SYSC_REG_RSTCTRL);
+		udelay(10000);
+
+		/* disable clock for port0's and port1's phys*/
+		t = rt_sysc_r32(RT3883_SYSC_REG_CLKCFG1);
+		t &= ~(RT3883_CLKCFG1_UPHY0_CLK_EN |
+		RT3883_CLKCFG1_UPHY1_CLK_EN);
+		rt_sysc_w32(t, RT3883_SYSC_REG_CLKCFG1);
+		udelay(10000);
+	}
+}
+
+static struct usb_ohci_pdata rt3883_ohci_data = {
+	.power_on	= rt3883_usb_power_on,
+	.power_off	= rt3883_usb_power_off,
+};
+
+static struct usb_ehci_pdata rt3883_ehci_data = {
+	.power_on	= rt3883_usb_power_on,
+	.power_off	= rt3883_usb_power_off,
+};
+
+static void ralink_add_usb(char *name, void *pdata, u64 *mask)
+{
+	struct device_node *node;
+	struct platform_device *pdev;
+
+	node = of_find_compatible_node(NULL, NULL, name);
+	if (!node)
+		return;
+
+	pdev = of_find_device_by_node(node);
+	if (!pdev)
+		goto error_out;
+
+	if (pdata)
+		pdev->dev.platform_data = pdata;
+	if (mask) {
+		pdev->dev.dma_mask = mask;
+		pdev->dev.coherent_dma_mask = *mask;
+	}
+
+error_out:
+	of_node_put(node);
+}
+
+static u64 rt3883_ohci_dmamask = DMA_BIT_MASK(32);
+static u64 rt3883_ehci_dmamask = DMA_BIT_MASK(32);
+
+void ralink_usb_platform(void)
+{
+	ralink_add_usb("ohci-platform",
+			&rt3883_ohci_data, &rt3883_ohci_dmamask);
+	ralink_add_usb("ehci-platform",
+			&rt3883_ehci_data, &rt3883_ehci_dmamask);
+}