Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stable

4 files changed, 323 insertions, 2 deletions

diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index ee67a71db80d..ed885f9d7b73 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -12,11 +12,16 @@
 
 #include <linux/init.h>
 #include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/fsl_devices.h>
 
 #include <mach/common.h>
 #include <mach/hardware.h>
 #include <mach/imx-uart.h>
 #include <mach/iomux-mx51.h>
+#include <mach/mxc_ehci.h>
 
 #include <asm/irq.h>
 #include <asm/setup.h>
@@ -26,6 +31,18 @@
 
 #include "devices.h"
 
+#define BABBAGE_USB_HUB_RESET   (0*32 + 7)      /* GPIO_1_7 */
+#define BABBAGE_USBH1_STP       (0*32 + 27)     /* GPIO_1_27 */
+#define BABBAGE_PHY_RESET (1*32 +5)     /* GPIO_2_5 */
+
+/* USB_CTRL_1 */
+#define MX51_USB_CTRL_1_OFFSET                  0x10
+#define MX51_USB_CTRL_UH1_EXT_CLK_EN            (1 << 25)
+
+#define MX51_USB_PLLDIV_12_MHZ          0x00
+#define MX51_USB_PLL_DIV_19_2_MHZ       0x01
+#define MX51_USB_PLL_DIV_24_MHZ 0x02
+
 static struct platform_device *devices[] __initdata = {
         &mxc_fec_device,
 };
@@ -46,6 +63,22 @@ static struct pad_desc mx51babbage_pads[] = {
         MX51_PAD_EIM_D26__UART3_TXD,
         MX51_PAD_EIM_D27__UART3_RTS,
         MX51_PAD_EIM_D24__UART3_CTS,
+
+        /* USB HOST1 */
+        MX51_PAD_USBH1_CLK__USBH1_CLK,
+        MX51_PAD_USBH1_DIR__USBH1_DIR,
+        MX51_PAD_USBH1_NXT__USBH1_NXT,
+        MX51_PAD_USBH1_DATA0__USBH1_DATA0,
+        MX51_PAD_USBH1_DATA1__USBH1_DATA1,
+        MX51_PAD_USBH1_DATA2__USBH1_DATA2,
+        MX51_PAD_USBH1_DATA3__USBH1_DATA3,
+        MX51_PAD_USBH1_DATA4__USBH1_DATA4,
+        MX51_PAD_USBH1_DATA5__USBH1_DATA5,
+        MX51_PAD_USBH1_DATA6__USBH1_DATA6,
+        MX51_PAD_USBH1_DATA7__USBH1_DATA7,
+
+        /* USB HUB reset line*/
+        MX51_PAD_GPIO_1_7__GPIO1_7,
 };
 
 /* Serial ports */
@@ -66,15 +99,149 @@ static inline void mxc_init_imx_uart(void)
 }
 #endif /* SERIAL_IMX */
 
+static int gpio_usbh1_active(void)
+{
+        struct pad_desc usbh1stp_gpio = MX51_PAD_USBH1_STP__GPIO_1_27;
+        struct pad_desc phyreset_gpio = MX51_PAD_EIM_D21__GPIO_2_5;
+        int ret;
+
+        /* Set USBH1_STP to GPIO and toggle it */
+        mxc_iomux_v3_setup_pad(&usbh1stp_gpio);
+        ret = gpio_request(BABBAGE_USBH1_STP, "usbh1_stp");
+
+        if (ret) {
+                pr_debug("failed to get MX51_PAD_USBH1_STP__GPIO_1_27: %d\n", ret);
+                return ret;
+        }
+        gpio_direction_output(BABBAGE_USBH1_STP, 0);
+        gpio_set_value(BABBAGE_USBH1_STP, 1);
+        msleep(100);
+        gpio_free(BABBAGE_USBH1_STP);
+
+        /* De-assert USB PHY RESETB */
+        mxc_iomux_v3_setup_pad(&phyreset_gpio);
+        ret = gpio_request(BABBAGE_PHY_RESET, "phy_reset");
+
+        if (ret) {
+                pr_debug("failed to get MX51_PAD_EIM_D21__GPIO_2_5: %d\n", ret);
+                return ret;
+        }
+        gpio_direction_output(BABBAGE_PHY_RESET, 1);
+        return 0;
+}
+
+static inline void babbage_usbhub_reset(void)
+{
+        int ret;
+
+        /* Bring USB hub out of reset */
+        ret = gpio_request(BABBAGE_USB_HUB_RESET, "GPIO1_7");
+        if (ret) {
+                printk(KERN_ERR"failed to get GPIO_USB_HUB_RESET: %d\n", ret);
+                return;
+        }
+        gpio_direction_output(BABBAGE_USB_HUB_RESET, 0);
+
+        /* USB HUB RESET - De-assert USB HUB RESET_N */
+        msleep(1);
+        gpio_set_value(BABBAGE_USB_HUB_RESET, 0);
+        msleep(1);
+        gpio_set_value(BABBAGE_USB_HUB_RESET, 1);
+}
+
+/* This function is board specific as the bit mask for the plldiv will also
+be different for other Freescale SoCs, thus a common bitmask is not
+possible and cannot get place in /plat-mxc/ehci.c.*/
+static int initialize_otg_port(struct platform_device *pdev)
+{
+        u32 v;
+        void __iomem *usb_base;
+        u32 usbother_base;
+
+        usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
+        usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
+
+        /* Set the PHY clock to 19.2MHz */
+        v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
+        v &= ~MX5_USB_UTMI_PHYCTRL1_PLLDIV_MASK;
+        v |= MX51_USB_PLL_DIV_19_2_MHZ;
+        __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC2_OFFSET);
+        iounmap(usb_base);
+        return 0;
+}
+
+static int initialize_usbh1_port(struct platform_device *pdev)
+{
+        u32 v;
+        void __iomem *usb_base;
+        u32 usbother_base;
+
+        usb_base = ioremap(MX51_OTG_BASE_ADDR, SZ_4K);
+        usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
+
+        /* The clock for the USBH1 ULPI port will come externally from the PHY. */
+        v = __raw_readl(usbother_base + MX51_USB_CTRL_1_OFFSET);
+        __raw_writel(v | MX51_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + MX51_USB_CTRL_1_OFFSET);
+        iounmap(usb_base);
+        return 0;
+}
+
+static struct mxc_usbh_platform_data dr_utmi_config = {
+        .init           = initialize_otg_port,
+        .portsc = MXC_EHCI_UTMI_16BIT,
+        .flags  = MXC_EHCI_INTERNAL_PHY,
+};
+
+static struct fsl_usb2_platform_data usb_pdata = {
+        .operating_mode = FSL_USB2_DR_DEVICE,
+        .phy_mode       = FSL_USB2_PHY_UTMI_WIDE,
+};
+
+static struct mxc_usbh_platform_data usbh1_config = {
+        .init           = initialize_usbh1_port,
+        .portsc = MXC_EHCI_MODE_ULPI,
+        .flags  = (MXC_EHCI_POWER_PINS_ENABLED | MXC_EHCI_ITC_NO_THRESHOLD),
+};
+
+static int otg_mode_host;
+
+static int __init babbage_otg_mode(char *options)
+{
+        if (!strcmp(options, "host"))
+                otg_mode_host = 1;
+        else if (!strcmp(options, "device"))
+                otg_mode_host = 0;
+        else
+                pr_info("otg_mode neither \"host\" nor \"device\". "
+                        "Defaulting to device\n");
+        return 0;
+}
+__setup("otg_mode=", babbage_otg_mode);
+
 /*
  * Board specific initialization.
  */
 static void __init mxc_board_init(void)
 {
+        struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+
         mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
                                         ARRAY_SIZE(mx51babbage_pads));
         mxc_init_imx_uart();
         platform_add_devices(devices, ARRAY_SIZE(devices));
+
+        if (otg_mode_host)
+                mxc_register_device(&mxc_usbdr_host_device, &dr_utmi_config);
+        else {
+                initialize_otg_port(NULL);
+                mxc_register_device(&mxc_usbdr_udc_device, &usb_pdata);
+        }
+
+        gpio_usbh1_active();
+        mxc_register_device(&mxc_usbh1_device, &usbh1_config);
+        /* setback USBH1_STP to be function */
+        mxc_iomux_v3_setup_pad(&usbh1stp);
+        babbage_usbhub_reset();
 }
 
 static void __init mx51_babbage_timer_init(void)
diff --git a/arch/arm/mach-mx5/clock-mx51.c b/arch/arm/mach-mx5/clock-mx51.c
index 1ee6ce4087b8..d9f612d3370e 100644
--- a/arch/arm/mach-mx5/clock-mx51.c
+++ b/arch/arm/mach-mx5/clock-mx51.c
@@ -37,6 +37,7 @@ static struct clk lp_apm_clk;
 static struct clk periph_apm_clk;
 static struct clk ahb_clk;
 static struct clk ipg_clk;
+static struct clk usboh3_clk;
 
 #define MAX_DPLL_WAIT_TRIES     1000 /* 1000 * udelay(1) = 1ms */
 
@@ -570,6 +571,35 @@ static int _clk_uart_set_parent(struct clk *clk, struct clk *parent)
         return 0;
 }
 
+static unsigned long clk_usboh3_get_rate(struct clk *clk)
+{
+        u32 reg, prediv, podf;
+        unsigned long parent_rate;
+
+        parent_rate = clk_get_rate(clk->parent);
+
+        reg = __raw_readl(MXC_CCM_CSCDR1);
+        prediv = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PRED_MASK) >>
+                  MXC_CCM_CSCDR1_USBOH3_CLK_PRED_OFFSET) + 1;
+        podf = ((reg & MXC_CCM_CSCDR1_USBOH3_CLK_PODF_MASK) >>
+                MXC_CCM_CSCDR1_USBOH3_CLK_PODF_OFFSET) + 1;
+
+        return parent_rate / (prediv * podf);
+}
+
+static int _clk_usboh3_set_parent(struct clk *clk, struct clk *parent)
+{
+        u32 reg, mux;
+
+        mux = _get_mux(parent, &pll1_sw_clk, &pll2_sw_clk, &pll3_sw_clk,
+                       &lp_apm_clk);
+        reg = __raw_readl(MXC_CCM_CSCMR1) & ~MXC_CCM_CSCMR1_USBOH3_CLK_SEL_MASK;
+        reg |= mux << MXC_CCM_CSCMR1_USBOH3_CLK_SEL_OFFSET;
+        __raw_writel(reg, MXC_CCM_CSCMR1);
+
+        return 0;
+}
+
 static unsigned long get_high_reference_clock_rate(struct clk *clk)
 {
         return external_high_reference;
@@ -691,6 +721,12 @@ static struct clk uart_root_clk = {
         .set_parent = _clk_uart_set_parent,
 };
 
+static struct clk usboh3_clk = {
+        .parent = &pll2_sw_clk,
+        .get_rate = clk_usboh3_get_rate,
+        .set_parent = _clk_usboh3_set_parent,
+};
+
 static struct clk ahb_max_clk = {
         .parent = &ahb_clk,
         .enable_reg = MXC_CCM_CCGR0,
@@ -779,6 +815,12 @@ static struct clk_lookup lookups[] = {
         _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
         _REGISTER_CLOCK(NULL, "gpt", gpt_clk)
         _REGISTER_CLOCK("fec.0", NULL, fec_clk)
+        _REGISTER_CLOCK("mxc-ehci.0", "usb", usboh3_clk)
+        _REGISTER_CLOCK("mxc-ehci.0", "usb_ahb", ahb_clk)
+        _REGISTER_CLOCK("mxc-ehci.1", "usb", usboh3_clk)
+        _REGISTER_CLOCK("mxc-ehci.1", "usb_ahb", ahb_clk)
+        _REGISTER_CLOCK("fsl-usb2-udc", "usb", usboh3_clk)
+        _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", ahb_clk)
 };
 
 static void clk_tree_init(void)
@@ -819,6 +861,9 @@ int __init mx51_clocks_init(unsigned long ckil, unsigned long osc,
         clk_enable(&cpu_clk);
         clk_enable(&main_bus_clk);
 
+        /* set the usboh3_clk parent to pll2_sw_clk */
+        clk_set_parent(&usboh3_clk, &pll2_sw_clk);
+
         /* System timer */
         mxc_timer_init(&gpt_clk, MX51_IO_ADDRESS(MX51_GPT1_BASE_ADDR),
                 MX51_MXC_INT_GPT);
diff --git a/arch/arm/mach-mx5/devices.c b/arch/arm/mach-mx5/devices.c
index d6fd3961ade9..7130449aacdc 100644
--- a/arch/arm/mach-mx5/devices.c
+++ b/arch/arm/mach-mx5/devices.c
@@ -1,5 +1,6 @@
 /*
  * Copyright 2009 Amit Kucheria <amit.kucheria@canonical.com>
+ * Copyright (C) 2010 Freescale Semiconductor, Inc.
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
@@ -10,8 +11,11 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/gpio.h>
 #include <mach/hardware.h>
 #include <mach/imx-uart.h>
+#include <mach/irqs.h>
 
 static struct resource uart0[] = {
         {
@@ -89,8 +93,109 @@ struct platform_device mxc_fec_device = {
         .resource = mxc_fec_resources,
 };
 
-/* Dummy definition to allow compiling in AVIC and TZIC simultaneously */
+static u64 usb_dma_mask = DMA_BIT_MASK(32);
+
+static struct resource usbotg_resources[] = {
+        {
+                .start = MX51_OTG_BASE_ADDR,
+                .end = MX51_OTG_BASE_ADDR + 0x1ff,
+                .flags = IORESOURCE_MEM,
+        },
+        {
+                .start = MX51_MXC_INT_USB_OTG,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+/* OTG gadget device */
+struct platform_device mxc_usbdr_udc_device = {
+        .name           = "fsl-usb2-udc",
+        .id             = -1,
+        .num_resources  = ARRAY_SIZE(usbotg_resources),
+        .resource       = usbotg_resources,
+        .dev            = {
+                .dma_mask               = &usb_dma_mask,
+                .coherent_dma_mask      = DMA_BIT_MASK(32),
+        },
+};
+
+struct platform_device mxc_usbdr_host_device = {
+        .name = "mxc-ehci",
+        .id = 0,
+        .num_resources = ARRAY_SIZE(usbotg_resources),
+        .resource = usbotg_resources,
+        .dev = {
+                .dma_mask = &usb_dma_mask,
+                .coherent_dma_mask = DMA_BIT_MASK(32),
+        },
+};
+
+static struct resource usbh1_resources[] = {
+        {
+                .start = MX51_OTG_BASE_ADDR + 0x200,
+                .end = MX51_OTG_BASE_ADDR + 0x200 + 0x1ff,
+                .flags = IORESOURCE_MEM,
+        },
+        {
+                .start = MX51_MXC_INT_USB_H1,
+                .flags = IORESOURCE_IRQ,
+        },
+};
+
+struct platform_device mxc_usbh1_device = {
+        .name = "mxc-ehci",
+        .id = 1,
+        .num_resources = ARRAY_SIZE(usbh1_resources),
+        .resource = usbh1_resources,
+        .dev = {
+                .dma_mask = &usb_dma_mask,
+                .coherent_dma_mask = DMA_BIT_MASK(32),
+        },
+};
+
+static struct resource mxc_wdt_resources[] = {
+        {
+                .start = MX51_WDOG_BASE_ADDR,
+                .end = MX51_WDOG_BASE_ADDR + SZ_16K - 1,
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+struct platform_device mxc_wdt = {
+        .name = "imx2-wdt",
+        .id = 0,
+        .num_resources = ARRAY_SIZE(mxc_wdt_resources),
+        .resource = mxc_wdt_resources,
+};
+
+static struct mxc_gpio_port mxc_gpio_ports[] = {
+        {
+                .chip.label = "gpio-0",
+                .base = MX51_IO_ADDRESS(MX51_GPIO1_BASE_ADDR),
+                .irq = MX51_MXC_INT_GPIO1_LOW,
+                .virtual_irq_start = MXC_GPIO_IRQ_START
+        },
+        {
+                .chip.label = "gpio-1",
+                .base = MX51_IO_ADDRESS(MX51_GPIO2_BASE_ADDR),
+                .irq = MX51_MXC_INT_GPIO2_LOW,
+                .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 1
+        },
+        {
+                .chip.label = "gpio-2",
+                .base = MX51_IO_ADDRESS(MX51_GPIO3_BASE_ADDR),
+                .irq = MX51_MXC_INT_GPIO3_LOW,
+                .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 2
+        },
+        {
+                .chip.label = "gpio-3",
+                .base = MX51_IO_ADDRESS(MX51_GPIO4_BASE_ADDR),
+                .irq = MX51_MXC_INT_GPIO4_LOW,
+                .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 3
+        },
+};
+
 int __init mxc_register_gpios(void)
 {
-        return 0;
+        return mxc_gpio_init(mxc_gpio_ports, ARRAY_SIZE(mxc_gpio_ports));
 }
diff --git a/arch/arm/mach-mx5/devices.h b/arch/arm/mach-mx5/devices.h
index f339ab8c19be..c879ae71cd5b 100644
--- a/arch/arm/mach-mx5/devices.h
+++ b/arch/arm/mach-mx5/devices.h
@@ -2,3 +2,7 @@ extern struct platform_device mxc_uart_device0;
 extern struct platform_device mxc_uart_device1;
 extern struct platform_device mxc_uart_device2;
 extern struct platform_device mxc_fec_device;
+extern struct platform_device mxc_usbdr_host_device;
+extern struct platform_device mxc_usbh1_device;
+extern struct platform_device mxc_usbdr_udc_device;
+extern struct platform_device mxc_wdt;