diff options
Diffstat (limited to 'drivers/usb/host/ehci-mx6.c')
| -rw-r--r-- | drivers/usb/host/ehci-mx6.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c new file mode 100644 index 000000000..5dec673c8 --- /dev/null +++ b/drivers/usb/host/ehci-mx6.c @@ -0,0 +1,200 @@ +/* + * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> + * 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 <common.h> +#include <usb.h> +#include <errno.h> +#include <linux/compiler.h> +#include <usb/ehci-fsl.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/clock.h> +#include <asm/arch/mx6x_pins.h> +#include <asm/arch/iomux-v3.h> + +#include "ehci.h" +#include "ehci-core.h" + +#define USB_OTGREGS_OFFSET 0x000 +#define USB_H1REGS_OFFSET 0x200 +#define USB_H2REGS_OFFSET 0x400 +#define USB_H3REGS_OFFSET 0x600 +#define USB_OTHERREGS_OFFSET 0x800 + +#define USB_H1_CTRL_OFFSET 0x04 + +#define USBPHY_CTRL 0x00000030 +#define USBPHY_CTRL_SET 0x00000034 +#define USBPHY_CTRL_CLR 0x00000038 +#define USBPHY_CTRL_TOG 0x0000003c + +#define USBPHY_PWD 0x00000000 +#define USBPHY_CTRL_SFTRST 0x80000000 +#define USBPHY_CTRL_CLKGATE 0x40000000 +#define USBPHY_CTRL_ENUTMILEVEL3 0x00008000 +#define USBPHY_CTRL_ENUTMILEVEL2 0x00004000 + +#define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000 +#define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000 + +#define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000 +#define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000 +#define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000 +#define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 + + +#define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ +#define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ + +/* USBCMD */ +#define UH1_USBCMD_OFFSET 0x140 +#define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ +#define UCMD_RESET (1 << 1) /* controller reset */ + +static void usbh1_internal_phy_clock_gate(int on) +{ + void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; + + phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET; + __raw_writel(USBPHY_CTRL_CLKGATE, phy_reg); +} + +static void usbh1_power_config(void) +{ + struct anatop_regs *anatop = (struct anatop_regs *)ANATOP_BASE_ADDR; + /* + * Some phy and power's special controls for host1 + * 1. The external charger detector needs to be disabled + * or the signal at DP will be poor + * 2. The PLL's power and output to usb for host 1 + * is totally controlled by IC, so the Software only needs + * to enable them at initializtion. + */ + __raw_writel(ANADIG_USB2_CHRG_DETECT_EN_B | + ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B, + &anatop->usb2_chrg_detect); + + __raw_writel(ANADIG_USB2_PLL_480_CTRL_BYPASS, + &anatop->usb2_pll_480_ctrl); + + __raw_writel(ANADIG_USB2_PLL_480_CTRL_ENABLE | + ANADIG_USB2_PLL_480_CTRL_POWER | + ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS, + &anatop->usb2_pll_480_ctrl_set); +} + +static int usbh1_phy_enable(void) +{ + void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; + void __iomem *phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); + void __iomem *usb_cmd = (void __iomem *)(USBOH3_USB_BASE_ADDR + + USB_H1REGS_OFFSET + + UH1_USBCMD_OFFSET); + u32 val; + + /* Stop then Reset */ + val = __raw_readl(usb_cmd); + val &= ~UCMD_RUN_STOP; + __raw_writel(val, usb_cmd); + while (__raw_readl(usb_cmd) & UCMD_RUN_STOP) + ; + + val = __raw_readl(usb_cmd); + val |= UCMD_RESET; + __raw_writel(val, usb_cmd); + while (__raw_readl(usb_cmd) & UCMD_RESET) + ; + + /* Reset USBPHY module */ + val = __raw_readl(phy_ctrl); + val |= USBPHY_CTRL_SFTRST; + __raw_writel(val, phy_ctrl); + udelay(10); + + /* Remove CLKGATE and SFTRST */ + val = __raw_readl(phy_ctrl); + val &= ~(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); + __raw_writel(val, phy_ctrl); + udelay(10); + + /* Power up the PHY */ + __raw_writel(0, phy_reg + USBPHY_PWD); + /* enable FS/LS device */ + val = __raw_readl(phy_reg + USBPHY_CTRL); + val |= (USBPHY_CTRL_ENUTMILEVEL2 | USBPHY_CTRL_ENUTMILEVEL3); + __raw_writel(val, phy_reg + USBPHY_CTRL); + + return 0; +} + +static void usbh1_oc_config(void) +{ + void __iomem *usb_base = (void __iomem *)USBOH3_USB_BASE_ADDR; + void __iomem *usbother_base = usb_base + USB_OTHERREGS_OFFSET; + u32 val; + + val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); +#if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2 + /* mx6qarm2 seems to required a different setting*/ + val &= ~UCTRL_OVER_CUR_POL; +#else + val |= UCTRL_OVER_CUR_POL; +#endif + __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); + + val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); + val |= UCTRL_OVER_CUR_DIS; + __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); +} + +int ehci_hcd_init(void) +{ + struct usb_ehci *ehci; + + enable_usboh3_clk(1); + mdelay(1); + + /* Do board specific initialization */ + board_ehci_hcd_init(CONFIG_MXC_USB_PORT); + +#if CONFIG_MXC_USB_PORT == 1 + /* USB Host 1 */ + usbh1_power_config(); + usbh1_oc_config(); + usbh1_internal_phy_clock_gate(1); + usbh1_phy_enable(); +#else +#error "MXC USB port not yet supported" +#endif + + ehci = (struct usb_ehci *)(USBOH3_USB_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); + + mdelay(10); + + return 0; +} + +int ehci_hcd_stop(void) +{ + return 0; +} |