diff options
Diffstat (limited to 'arch/arm/mach-mx28/usb_dr.c')
| -rw-r--r-- | arch/arm/mach-mx28/usb_dr.c | 570 |
1 files changed, 570 insertions, 0 deletions
diff --git a/arch/arm/mach-mx28/usb_dr.c b/arch/arm/mach-mx28/usb_dr.c new file mode 100644 index 000000000000..dff6b35840f2 --- /dev/null +++ b/arch/arm/mach-mx28/usb_dr.c @@ -0,0 +1,570 @@ +/* + * Copyright (C) 2009-2011 Freescale Semiconductor, Inc. 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 as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <linux/fsl_devices.h> +#include <linux/gpio.h> + +#include <mach/irqs.h> +#include <mach/arc_otg.h> +#include "usb.h" +#include "mx28_pins.h" +#define USB_POWER_ENABLE MXS_PIN_TO_GPIO(PINID_AUART2_TX) + +extern int clk_get_usecount(struct clk *clk); +static struct clk *usb_clk; +static struct clk *usb_phy_clk; +static struct platform_device *otg_host_pdev; + +/* Beginning of Common operation for DR port */ +void fsl_phy_usb_utmi_init(struct fsl_xcvr_ops *this) +{ +} + +void fsl_phy_usb_utmi_uninit(struct fsl_xcvr_ops *this) +{ +} + +/*! + * set vbus power + * + * @param view viewport register + * @param on power on or off + */ +void fsl_phy_set_power(struct fsl_xcvr_ops *this, + struct fsl_usb2_platform_data *pdata, int on) +{ + /* USB_POWER_ENABLE_PIN have request at pin init*/ + if (pdata->phy_regs != USBPHY1_PHYS_ADDR) { + pr_debug("%s: on is %d\n", __func__, on); + gpio_direction_output(USB_POWER_ENABLE, on); + gpio_set_value(USB_POWER_ENABLE, on); + } +} + +static void usb_host_phy_resume(struct fsl_usb2_platform_data *plat) +{ + fsl_platform_set_usb_phy_dis(plat, 0); +} + +static int internal_phy_clk_already_on; +static void usbotg_internal_phy_clock_gate(bool on) +{ + u32 tmp; + void __iomem *phy_reg = IO_ADDRESS(USBPHY0_PHYS_ADDR); + if (on) { + internal_phy_clk_already_on += 1; + if (internal_phy_clk_already_on == 1) { + pr_debug ("%s, Clock on UTMI \n", __func__); + tmp = BM_USBPHY_CTRL_SFTRST | BM_USBPHY_CTRL_CLKGATE; + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR); + } + } else { + internal_phy_clk_already_on -= 1; + if (internal_phy_clk_already_on == 0) { + pr_debug ("%s, Clock off UTMI \n", __func__); + tmp = BM_USBPHY_CTRL_CLKGATE; + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_SET); + } + } + if (internal_phy_clk_already_on < 0) + printk(KERN_ERR "please check internal phy clock ON/OFF sequence \n"); +} + +static int usbotg_init_ext(struct platform_device *pdev) +{ + usb_clk = clk_get(NULL, "usb_clk0"); + clk_enable(usb_clk); + clk_put(usb_clk); + + usb_phy_clk = clk_get(NULL, "usb_phy_clk0"); + clk_enable(usb_phy_clk); + clk_put(usb_phy_clk); + + usbotg_internal_phy_clock_gate(true); + return usbotg_init(pdev); +} + +static void usbotg_uninit_ext(struct fsl_usb2_platform_data *pdata) +{ + usbotg_uninit(pdata); + + usbotg_internal_phy_clock_gate(false); + clk_disable(usb_phy_clk); + clk_disable(usb_clk); +} + +static void usbotg_clock_gate(bool on) +{ + pr_debug("%s: on is %d\n", __func__, on); + if (on) { + clk_enable(usb_clk); + clk_enable(usb_phy_clk); + usbotg_internal_phy_clock_gate(on); + } else { + usbotg_internal_phy_clock_gate(on); + clk_disable(usb_phy_clk); + clk_disable(usb_clk); + } + + pr_debug("usb_clk0_ref_count:%d, usb_phy_clk0_ref_count:%d\n", clk_get_usecount(usb_clk), clk_get_usecount(usb_phy_clk)); +} + +/* Below two macros are used at otg mode to indicate usb mode*/ +#define ENABLED_BY_HOST (0x1 << 0) +#define ENABLED_BY_DEVICE (0x1 << 1) +static u32 low_power_enable_src; /* only useful at otg mode */ +static void enter_phy_lowpower_suspend(struct fsl_usb2_platform_data *pdata, bool enable) +{ + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + void __iomem *usb_reg = pdata->regs; + u32 tmp; + pr_debug("DR: %s, enable is %d\n", __func__, enable); + + if (enable) { + tmp = __raw_readl(usb_reg + UOG_PORTSC1); + tmp |= PORTSC_PHCD; + __raw_writel(tmp, usb_reg + UOG_PORTSC1); + + pr_debug("%s, Poweroff UTMI \n", __func__); + + tmp = (BM_USBPHY_PWD_TXPWDFS + | BM_USBPHY_PWD_TXPWDIBIAS + | BM_USBPHY_PWD_TXPWDV2I + | BM_USBPHY_PWD_RXPWDENV + | BM_USBPHY_PWD_RXPWD1PT1 + | BM_USBPHY_PWD_RXPWDDIFF + | BM_USBPHY_PWD_RXPWDRX); + __raw_writel(tmp, phy_reg + HW_USBPHY_PWD_SET); + + pr_debug ("%s, Polling UTMI enter suspend \n", __func__); + while (tmp & BM_USBPHY_CTRL_UTMI_SUSPENDM) + tmp = __raw_readl(phy_reg + HW_USBPHY_CTRL); + } else { + tmp = (BM_USBPHY_PWD_TXPWDFS + | BM_USBPHY_PWD_TXPWDIBIAS + | BM_USBPHY_PWD_TXPWDV2I + | BM_USBPHY_PWD_RXPWDENV + | BM_USBPHY_PWD_RXPWD1PT1 + | BM_USBPHY_PWD_RXPWDDIFF + | BM_USBPHY_PWD_RXPWDRX); + __raw_writel(tmp, phy_reg + HW_USBPHY_PWD_CLR); + + tmp = __raw_readl(usb_reg + UOG_PORTSC1); + tmp &= ~PORTSC_PHCD; + __raw_writel(tmp, usb_reg + UOG_PORTSC1); + } +} + +static void __phy_lowpower_suspend(struct fsl_usb2_platform_data *pdata, bool enable, int source) +{ + if (enable) { + low_power_enable_src |= source; +#ifdef CONFIG_USB_OTG + if (low_power_enable_src == (ENABLED_BY_HOST | ENABLED_BY_DEVICE)) { + pr_debug("phy lowpower enabled\n"); + enter_phy_lowpower_suspend(pdata, enable); + } +#else + enter_phy_lowpower_suspend(pdata, enable); +#endif + } else { + pr_debug("phy lowpower disable\n"); + enter_phy_lowpower_suspend(pdata, enable); + low_power_enable_src &= ~source; + } +} + +static void otg_wake_up_enable(struct fsl_usb2_platform_data *pdata, bool enable) +{ + u32 tmp; + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + + pr_debug("%s, enable is %d\n", __func__, enable); + if (enable) { + tmp = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ; + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR); + + __raw_writel(BM_USBPHY_CTRL_ENIRQWAKEUP, phy_reg + HW_USBPHY_CTRL_SET); + } else { + tmp = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ; + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR); + + __raw_writel(BM_USBPHY_CTRL_ENIRQWAKEUP, phy_reg + HW_USBPHY_CTRL_CLR); + /* The interrupt must be disabled for at least 3 + * cycles of the standby clock(32k Hz) , that is 0.094 ms*/ + udelay(100); + } +} + +static u32 wakeup_irq_enable_src; /* only useful at otg mode */ +static void __wakeup_irq_enable(struct fsl_usb2_platform_data *pdata, bool on, int source) + { + /* otg host and device share the OWIE bit, only when host and device + * all enable the wakeup irq, we can enable the OWIE bit + */ + if (on) { +#ifdef CONFIG_USB_OTG + wakeup_irq_enable_src |= source; + if (wakeup_irq_enable_src == (ENABLED_BY_HOST | ENABLED_BY_DEVICE)) { + otg_wake_up_enable(pdata, on); + } +#else + otg_wake_up_enable(pdata, on); +#endif + } else { + otg_wake_up_enable(pdata, on); + wakeup_irq_enable_src &= ~source; + /* The interrupt must be disabled for at least 3 clock + * cycles of the standby clock(32k Hz) , that is 0.094 ms*/ + udelay(100); + } +} + +/* The wakeup operation for DR port, it will clear the wakeup irq status + * and re-enable the wakeup + */ +static void usbotg_wakeup_event_clear(void) +{ + void __iomem *phy_reg = IO_ADDRESS(USBPHY0_PHYS_ADDR); + u32 wakeup_irq_bits; + + wakeup_irq_bits = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ; + if (__raw_readl(phy_reg + HW_USBPHY_CTRL) && wakeup_irq_bits) { + /* clear the wakeup interrupt status */ + __raw_writel(wakeup_irq_bits, phy_reg + HW_USBPHY_CTRL_CLR); + } +} + +/* End of Common operation for DR port */ + + +#ifdef CONFIG_USB_EHCI_ARC_OTG +extern void fsl_usb_recover_hcd(struct platform_device *pdev); +/* Beginning of host related operation for DR port */ +static void _host_phy_lowpower_suspend(struct fsl_usb2_platform_data *pdata, bool enable) +{ + __phy_lowpower_suspend(pdata, enable, ENABLED_BY_HOST); +} + +static void _host_wakeup_enable(struct fsl_usb2_platform_data *pdata, bool enable) +{ + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + u32 tmp; + + __wakeup_irq_enable(pdata, enable, ENABLED_BY_HOST); + tmp = BM_USBPHY_CTRL_ENIDCHG_WKUP | BM_USBPHY_CTRL_ENDPDMCHG_WKUP; + /* host only care the ID change wakeup event */ + if (enable) { + pr_debug("DR: host wakeup enable\n"); + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_SET); + } else { + pr_debug("DR: host wakeup disable\n"); + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR); + /* The interrupt must be disabled for at least 3 clock + * cycles of the standby clock(32k Hz) , that is 0.094 ms*/ + udelay(100); + } +} + +static enum usb_wakeup_event _is_host_wakeup(struct fsl_usb2_platform_data *pdata) +{ + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + void __iomem *usb_reg = pdata->regs; + u32 wakeup_irq_bits, wakeup_req, otgsc; + + pr_debug("%s\n", __func__); + wakeup_irq_bits = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ; + otgsc = __raw_readl(usb_reg + UOG_OTGSC); + + if (__raw_readl(phy_reg + HW_USBPHY_CTRL) && wakeup_irq_bits) + wakeup_req = 1; + + /* if ID change sts, it is a host wakeup event */ + if (wakeup_req && (otgsc & OTGSC_IS_USB_ID)) { + pr_debug("otg host ID wakeup\n"); + /* if host ID wakeup, we must clear the b session change sts */ + __raw_writel(wakeup_irq_bits, phy_reg + HW_USBPHY_CTRL_CLR); + __raw_writel(otgsc & (~OTGSC_IS_USB_ID), usb_reg + UOG_OTGSC); + return WAKEUP_EVENT_ID; + } + if (wakeup_req && (!(otgsc & OTGSC_STS_USB_ID))) { + __raw_writel(wakeup_irq_bits, phy_reg + HW_USBPHY_CTRL_CLR); + pr_debug("otg host Remote wakeup\n"); + return WAKEUP_EVENT_DPDM; + } + return WAKEUP_EVENT_INVALID; +} + +static void host_wakeup_handler(struct fsl_usb2_platform_data *pdata) +{ + _host_wakeup_enable(pdata, false); + _host_phy_lowpower_suspend(pdata, false); + fsl_usb_recover_hcd(otg_host_pdev); +} +/* End of host related operation for DR port */ +#endif /* CONFIG_USB_EHCI_ARC_OTG */ + + +#ifdef CONFIG_USB_GADGET_ARC +/* Beginning of device related operation for DR port */ +static void _device_phy_lowpower_suspend(struct fsl_usb2_platform_data *pdata, bool enable) +{ + __phy_lowpower_suspend(pdata, enable, ENABLED_BY_DEVICE); +} + +static void _device_wakeup_enable(struct fsl_usb2_platform_data *pdata, bool enable) +{ + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + u32 tmp; + + tmp = BM_USBPHY_CTRL_ENVBUSCHG_WKUP | BM_USBPHY_CTRL_ENDPDMCHG_WKUP; + __wakeup_irq_enable(pdata, enable, ENABLED_BY_DEVICE); + /* if udc is not used by any gadget, we can not enable the vbus wakeup */ + if (!pdata->port_enables) { + __raw_writel(BM_USBPHY_CTRL_ENVBUSCHG_WKUP, phy_reg + HW_USBPHY_CTRL_CLR); + return; + } + if (enable) { + pr_debug("device wakeup enable\n"); + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_SET); + } else { + pr_debug("device wakeup disable\n"); + __raw_writel(tmp, phy_reg + HW_USBPHY_CTRL_CLR); + } +} + +static enum usb_wakeup_event _is_device_wakeup(struct fsl_usb2_platform_data *pdata) +{ + void __iomem *phy_reg = IO_ADDRESS(pdata->phy_regs); + void __iomem *usb_reg = pdata->regs; + u32 wakeup_irq_bits, wakeup_req, otgsc; + + pr_debug("%s\n", __func__); + wakeup_irq_bits = BM_USBPHY_CTRL_RESUME_IRQ | BM_USBPHY_CTRL_WAKEUP_IRQ; + otgsc = __raw_readl(usb_reg + UOG_OTGSC); + if (__raw_readl(phy_reg + HW_USBPHY_CTRL) && wakeup_irq_bits) { + wakeup_req = 1; + } + + /* if ID change sts, it is a host wakeup event */ + if (wakeup_req && (otgsc & OTGSC_STS_USB_ID) && (otgsc & OTGSC_IS_B_SESSION_VALID)) { + pr_debug("otg device wakeup\n"); + /* if host ID wakeup, we must clear the b session change sts */ + __raw_writel(wakeup_irq_bits, phy_reg + HW_USBPHY_CTRL_CLR); + return WAKEUP_EVENT_VBUS; + } + + return WAKEUP_EVENT_INVALID; +} + +static void device_wakeup_handler(struct fsl_usb2_platform_data *pdata) +{ + _device_wakeup_enable(pdata, false); + _device_phy_lowpower_suspend(pdata, false); +} + +/* end of device related operation for DR port */ +#endif /* CONFIG_USB_GADGET_ARC */ + +/* + * platform data structs + * - Which one to use is determined by CONFIG options in usb.h + * - operating_mode plugged at run time + */ +static struct fsl_usb2_platform_data __maybe_unused dr_utmi_config = { + .name = "DR", + .platform_init = usbotg_init_ext, + .platform_uninit = usbotg_uninit_ext, + .usb_clock_for_pm = usbotg_clock_gate, + .phy_mode = FSL_USB2_PHY_UTMI_WIDE, + .power_budget = 500, /* 500 mA max power */ + .platform_resume = usb_host_phy_resume, + .transceiver = "utmi", + .phy_regs = USBPHY0_PHYS_ADDR, +}; + +/* + * OTG resources + */ +static struct resource otg_resources[] = { + [0] = { + .start = (u32)USBCTRL0_PHYS_ADDR, + .end = (u32)(USBCTRL0_PHYS_ADDR + 0x1ff), + .flags = IORESOURCE_MEM, + }, + + [1] = { + .start = IRQ_USB0, + .flags = IORESOURCE_IRQ, + }, +}; + +/* + * UDC resources (same as OTG resource) + */ +static struct resource udc_resources[] = { + [0] = { + .start = (u32)USBCTRL0_PHYS_ADDR, + .end = (u32)(USBCTRL0_PHYS_ADDR + 0x1ff), + .flags = IORESOURCE_MEM, + }, + + [1] = { + .start = IRQ_USB0, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 dr_udc_dmamask = ~(u32) 0; +static void dr_udc_release(struct device *dev) +{ +} + +/* + * platform device structs + * dev.platform_data field plugged at run time + */ +static struct platform_device dr_udc_device = { + .name = "fsl-usb2-udc", + .id = -1, + .dev = { + .release = dr_udc_release, + .dma_mask = &dr_udc_dmamask, + .coherent_dma_mask = 0xffffffff, + }, + .resource = otg_resources, + .num_resources = ARRAY_SIZE(otg_resources), +}; + +static u64 dr_otg_dmamask = ~(u32) 0; +static void dr_otg_release(struct device *dev) +{} + +static struct platform_device __maybe_unused dr_otg_device = { + .name = "fsl-usb2-otg", + .id = -1, + .dev = { + .release = dr_otg_release, + .dma_mask = &dr_otg_dmamask, + .coherent_dma_mask = 0xffffffff, + }, + .resource = udc_resources, + .num_resources = ARRAY_SIZE(udc_resources), +}; + +static struct resource usbotg_wakeup_resources[] = { + { + .start = IRQ_USB0_WAKEUP, /*wakeup irq*/ + .flags = IORESOURCE_IRQ, + }, + { + .start = IRQ_USB0, /* usb core irq */ + .flags = IORESOURCE_IRQ, + }, +}; + +struct platform_device mxs_usbotg_wakeup_device = { + .name = "usb_wakeup", + .id = 1, + .num_resources = ARRAY_SIZE(usbotg_wakeup_resources), + .resource = usbotg_wakeup_resources, +}; + +static struct fsl_usb2_wakeup_platform_data usbdr_wakeup_config = { + .name = "DR wakeup", + .usb_clock_for_pm = usbotg_clock_gate, + .usb_wakeup_exhandle = usbotg_wakeup_event_clear, +}; + +static int __init usb_dr_init(void) +{ + struct platform_device *pdev; + + pr_debug("%s: \n", __func__); + dr_utmi_config.change_ahb_burst = 1; + dr_utmi_config.ahb_burst_mode = 0; + +#ifdef CONFIG_USB_OTG + dr_utmi_config.operating_mode = FSL_USB2_DR_OTG; + /* wake_up_enalbe is useless, just for usb_register_remote_wakeup execution*/ + dr_utmi_config.wake_up_enable = _device_wakeup_enable; + dr_utmi_config.irq_delay = 0; + dr_utmi_config.wakeup_pdata = &usbdr_wakeup_config; + + if (platform_device_register(&dr_otg_device)) + printk(KERN_ERR "usb DR: can't register otg device\n"); + else { + platform_device_add_data(&dr_otg_device, &dr_utmi_config, sizeof(dr_utmi_config)); + usbdr_wakeup_config.usb_pdata[0] = dr_otg_device.dev.platform_data; + } +#endif + +#ifdef CONFIG_USB_EHCI_ARC_OTG + dr_utmi_config.operating_mode = DR_HOST_MODE; + dr_utmi_config.wake_up_enable = _host_wakeup_enable; + dr_utmi_config.phy_lowpower_suspend = _host_phy_lowpower_suspend; + dr_utmi_config.wakeup_handler = host_wakeup_handler; + dr_utmi_config.is_wakeup_event = _is_host_wakeup; + dr_utmi_config.irq_delay = 0; + dr_utmi_config.wakeup_pdata = &usbdr_wakeup_config; + pdev = host_pdev_register(otg_resources, + ARRAY_SIZE(otg_resources), &dr_utmi_config); + if (pdev) { + usbdr_wakeup_config.usb_pdata[1] = pdev->dev.platform_data; + otg_host_pdev = pdev; + } else + printk(KERN_ERR "usb DR: can't alloc platform device for host\n"); +#endif + +#ifdef CONFIG_USB_GADGET_ARC + dr_utmi_config.operating_mode = DR_UDC_MODE; + dr_utmi_config.wake_up_enable = _device_wakeup_enable; + dr_utmi_config.phy_lowpower_suspend = _device_phy_lowpower_suspend; + dr_utmi_config.is_wakeup_event = _is_device_wakeup; + dr_utmi_config.wakeup_handler = device_wakeup_handler; + dr_utmi_config.irq_delay = 0; + dr_utmi_config.wakeup_pdata = &usbdr_wakeup_config; + + if (platform_device_register(&dr_udc_device)) + printk(KERN_ERR "usb DR: can't register udc device\n"); + else { + platform_device_add_data(&dr_udc_device, &dr_utmi_config, sizeof(dr_utmi_config)); + usbdr_wakeup_config.usb_pdata[2] = dr_udc_device.dev.platform_data; + } +#endif + + mxs_usbotg_wakeup_device.dev.platform_data = &usbdr_wakeup_config; + + if (platform_device_register(&mxs_usbotg_wakeup_device)) + printk(KERN_ERR "usb DR wakeup device\n"); + else + printk(KERN_INFO "usb DR wakeup device is registered\n"); + + return 0; +} +#ifdef CONFIG_MXS_VBUS_CURRENT_DRAW + fs_initcall(usb_dr_init); +#else + subsys_initcall(usb_dr_init); +#endif |