From 1ca56202532395f26fc59a87e62c9cab1541f9f3 Mon Sep 17 00:00:00 2001 From: Wolfgang Grandegger Date: Fri, 11 Nov 2011 14:03:36 +0100 Subject: USB: MX5: add generic USB EHCI support for mx51 and mx53 It's derived from ehci-mxc and uses the header files of the ehci-fsl interface. The callback board_ehci_hcd_init() has been introduced to allow for board-specific setup when USB is started. Signed-off-by: Wolfgang Grandegger CC: Stefano Babic CC: Remy Bohmer --- drivers/usb/host/Makefile | 1 + drivers/usb/host/ehci-mx5.c | 174 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 175 insertions(+) create mode 100644 drivers/usb/host/ehci-mx5.c (limited to 'drivers/usb') diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 09abb75..77e217f 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -42,6 +42,7 @@ COBJS-$(CONFIG_USB_EHCI_FSL) += ehci-fsl.o endif COBJS-$(CONFIG_USB_EHCI_MXC) += ehci-mxc.o COBJS-$(CONFIG_USB_EHCI_MXS) += ehci-mxs.o +COBJS-$(CONFIG_USB_EHCI_MX5) += ehci-mx5.o COBJS-$(CONFIG_USB_EHCI_PPC4XX) += ehci-ppc4xx.o COBJS-$(CONFIG_USB_EHCI_IXP4XX) += ehci-ixp.o COBJS-$(CONFIG_USB_EHCI_KIRKWOOD) += ehci-kirkwood.o diff --git a/drivers/usb/host/ehci-mx5.c b/drivers/usb/host/ehci-mx5.c new file mode 100644 index 0000000..4c961d3 --- /dev/null +++ b/drivers/usb/host/ehci-mx5.c @@ -0,0 +1,174 @@ +/* + * Copyright (c) 2009 Daniel Mack + * Copyright (C) 2010 Freescale Semiconductor, Inc. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "ehci.h" +#include "ehci-core.h" + +#define MX5_USBOTHER_REGS_OFFSET 0x800 + + +#define MXC_OTG_OFFSET 0 +#define MXC_H1_OFFSET 0x200 +#define MXC_H2_OFFSET 0x400 + +#define MXC_USBCTRL_OFFSET 0 +#define MXC_USB_PHY_CTR_FUNC_OFFSET 0x8 +#define MXC_USB_PHY_CTR_FUNC2_OFFSET 0xc +#define MXC_USB_CTRL_1_OFFSET 0x10 +#define MXC_USBH2CTRL_OFFSET 0x14 + +/* USB_CTRL */ +#define MXC_OTG_UCTRL_OWIE_BIT (1 << 27) /* OTG wakeup intr enable */ +#define MXC_OTG_UCTRL_OPM_BIT (1 << 24) /* OTG power mask */ +#define MXC_H1_UCTRL_H1UIE_BIT (1 << 12) /* Host1 ULPI interrupt enable */ +#define MXC_H1_UCTRL_H1WIE_BIT (1 << 11) /* HOST1 wakeup intr enable */ +#define MXC_H1_UCTRL_H1PM_BIT (1 << 8) /* HOST1 power mask */ + +/* USB_PHY_CTRL_FUNC */ +#define MXC_OTG_PHYCTRL_OC_DIS_BIT (1 << 8) /* OTG Disable Overcurrent Event */ +#define MXC_H1_OC_DIS_BIT (1 << 5) /* UH1 Disable Overcurrent Event */ + +/* USBH2CTRL */ +#define MXC_H2_UCTRL_H2UIE_BIT (1 << 8) +#define MXC_H2_UCTRL_H2WIE_BIT (1 << 7) +#define MXC_H2_UCTRL_H2PM_BIT (1 << 4) + +/* USB_CTRL_1 */ +#define MXC_USB_CTRL_UH1_EXT_CLK_EN (1 << 25) + +int mxc_set_usbcontrol(int port, unsigned int flags) +{ + unsigned int v; + void __iomem *usb_base = (void __iomem *)OTG_BASE_ADDR; + void __iomem *usbother_base; + int ret = 0; + + usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET; + + switch (port) { + case 0: /* OTG port */ + if (flags & MXC_EHCI_INTERNAL_PHY) { + v = __raw_readl(usbother_base + + MXC_USB_PHY_CTR_FUNC_OFFSET); + if (flags & MXC_EHCI_POWER_PINS_ENABLED) + /* OC/USBPWR is not used */ + v |= MXC_OTG_PHYCTRL_OC_DIS_BIT; + else + /* OC/USBPWR is used */ + v &= ~MXC_OTG_PHYCTRL_OC_DIS_BIT; + __raw_writel(v, usbother_base + + MXC_USB_PHY_CTR_FUNC_OFFSET); + + v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET); + if (flags & MXC_EHCI_POWER_PINS_ENABLED) + v |= MXC_OTG_UCTRL_OPM_BIT; + else + v &= ~MXC_OTG_UCTRL_OPM_BIT; + __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET); + } + break; + case 1: /* Host 1 Host ULPI */ +#ifdef CONFIG_MX51 + /* The clock for the USBH1 ULPI port will come externally + from the PHY. */ + v = __raw_readl(usbother_base + MXC_USB_CTRL_1_OFFSET); + __raw_writel(v | MXC_USB_CTRL_UH1_EXT_CLK_EN, usbother_base + + MXC_USB_CTRL_1_OFFSET); +#endif + + v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET); + if (flags & MXC_EHCI_POWER_PINS_ENABLED) + v &= ~MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used */ + else + v |= MXC_H1_UCTRL_H1PM_BIT; /* HOST1 power mask used */ + __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET); + + v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET); + if (flags & MXC_EHCI_POWER_PINS_ENABLED) + v &= ~MXC_H1_OC_DIS_BIT; /* OC is used */ + else + v |= MXC_H1_OC_DIS_BIT; /* OC is not used */ + __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET); + + break; + case 2: /* Host 2 ULPI */ + v = __raw_readl(usbother_base + MXC_USBH2CTRL_OFFSET); + if (flags & MXC_EHCI_POWER_PINS_ENABLED) + v &= ~MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used */ + else + v |= MXC_H2_UCTRL_H2PM_BIT; /* HOST2 power mask used */ + + __raw_writel(v, usbother_base + MXC_USBH2CTRL_OFFSET); + break; + } + + return ret; +} + +int ehci_hcd_init(void) +{ + struct usb_ehci *ehci; +#ifdef CONFIG_MX53 + struct clkctl *sc_regs = (struct clkctl *)CCM_BASE_ADDR; + u32 reg; + + reg = __raw_readl(&sc_regs->cscmr1) & ~(1 << 26); + /* derive USB PHY clock multiplexer from PLL3 */ + reg |= 1 << 26; + __raw_writel(reg, &sc_regs->cscmr1); +#endif + + set_usboh3_clk(); + enable_usboh3_clk(1); + set_usb_phy2_clk(); + enable_usb_phy2_clk(1); + mdelay(1); + + /* do board specific initialization */ + board_ehci_hcd_init(CONFIG_MXC_USB_PORT); + + ehci = (struct usb_ehci *)(OTG_BASE_ADDR + + (0x200 * CONFIG_MXC_USB_PORT)); + hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); + hcor = (struct ehci_hcor *)((uint32_t)hccr + + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); + setbits_le32(&ehci->usbmode, CM_HOST); + + __raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); + setbits_le32(&ehci->portsc, USB_EN); + + mxc_set_usbcontrol(CONFIG_MXC_USB_PORT, CONFIG_MXC_USB_FLAGS); + + mdelay(10); + + return 0; +} + +int ehci_hcd_stop(void) +{ + return 0; +} + + -- cgit v1.1