1 /* 2 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> 3 * Copyright (C) 2010 Freescale Semiconductor, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License as published by the 7 * Free Software Foundation; either version 2 of the License, or (at your 8 * option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, but 11 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 12 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * for more details. 14 */ 15 16 #include <common.h> 17 #include <usb.h> 18 #include <errno.h> 19 #include <linux/compiler.h> 20 #include <usb/ehci-fsl.h> 21 #include <asm/io.h> 22 #include <asm/arch/imx-regs.h> 23 #include <asm/arch/clock.h> 24 #include <asm/arch/mx6x_pins.h> 25 #include <asm/arch/iomux-v3.h> 26 27 #include "ehci.h" 28 #include "ehci-core.h" 29 30 #define USB_OTGREGS_OFFSET 0x000 31 #define USB_H1REGS_OFFSET 0x200 32 #define USB_H2REGS_OFFSET 0x400 33 #define USB_H3REGS_OFFSET 0x600 34 #define USB_OTHERREGS_OFFSET 0x800 35 36 #define USB_H1_CTRL_OFFSET 0x04 37 38 #define USBPHY_CTRL 0x00000030 39 #define USBPHY_CTRL_SET 0x00000034 40 #define USBPHY_CTRL_CLR 0x00000038 41 #define USBPHY_CTRL_TOG 0x0000003c 42 43 #define USBPHY_PWD 0x00000000 44 #define USBPHY_CTRL_SFTRST 0x80000000 45 #define USBPHY_CTRL_CLKGATE 0x40000000 46 #define USBPHY_CTRL_ENUTMILEVEL3 0x00008000 47 #define USBPHY_CTRL_ENUTMILEVEL2 0x00004000 48 49 #define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000 50 #define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000 51 52 #define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000 53 #define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000 54 #define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000 55 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 56 57 58 #define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ 59 #define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ 60 61 /* USBCMD */ 62 #define UH1_USBCMD_OFFSET 0x140 63 #define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ 64 #define UCMD_RESET (1 << 1) /* controller reset */ 65 66 static void usbh1_internal_phy_clock_gate(int on) 67 { 68 void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; 69 70 phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET; 71 __raw_writel(USBPHY_CTRL_CLKGATE, phy_reg); 72 } 73 74 static void usbh1_power_config(void) 75 { 76 struct anatop_regs __iomem *anatop = 77 (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; 78 /* 79 * Some phy and power's special controls for host1 80 * 1. The external charger detector needs to be disabled 81 * or the signal at DP will be poor 82 * 2. The PLL's power and output to usb for host 1 83 * is totally controlled by IC, so the Software only needs 84 * to enable them at initializtion. 85 */ 86 __raw_writel(ANADIG_USB2_CHRG_DETECT_EN_B | 87 ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B, 88 &anatop->usb2_chrg_detect); 89 90 __raw_writel(ANADIG_USB2_PLL_480_CTRL_BYPASS, 91 &anatop->usb2_pll_480_ctrl_clr); 92 93 __raw_writel(ANADIG_USB2_PLL_480_CTRL_ENABLE | 94 ANADIG_USB2_PLL_480_CTRL_POWER | 95 ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS, 96 &anatop->usb2_pll_480_ctrl_set); 97 } 98 99 static int usbh1_phy_enable(void) 100 { 101 void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; 102 void __iomem *phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 103 void __iomem *usb_cmd = (void __iomem *)(USBOH3_USB_BASE_ADDR + 104 USB_H1REGS_OFFSET + 105 UH1_USBCMD_OFFSET); 106 u32 val; 107 108 /* Stop then Reset */ 109 val = __raw_readl(usb_cmd); 110 val &= ~UCMD_RUN_STOP; 111 __raw_writel(val, usb_cmd); 112 while (__raw_readl(usb_cmd) & UCMD_RUN_STOP) 113 ; 114 115 val = __raw_readl(usb_cmd); 116 val |= UCMD_RESET; 117 __raw_writel(val, usb_cmd); 118 while (__raw_readl(usb_cmd) & UCMD_RESET) 119 ; 120 121 /* Reset USBPHY module */ 122 val = __raw_readl(phy_ctrl); 123 val |= USBPHY_CTRL_SFTRST; 124 __raw_writel(val, phy_ctrl); 125 udelay(10); 126 127 /* Remove CLKGATE and SFTRST */ 128 val = __raw_readl(phy_ctrl); 129 val &= ~(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); 130 __raw_writel(val, phy_ctrl); 131 udelay(10); 132 133 /* Power up the PHY */ 134 __raw_writel(0, phy_reg + USBPHY_PWD); 135 /* enable FS/LS device */ 136 val = __raw_readl(phy_reg + USBPHY_CTRL); 137 val |= (USBPHY_CTRL_ENUTMILEVEL2 | USBPHY_CTRL_ENUTMILEVEL3); 138 __raw_writel(val, phy_reg + USBPHY_CTRL); 139 140 return 0; 141 } 142 143 static void usbh1_oc_config(void) 144 { 145 void __iomem *usb_base = (void __iomem *)USBOH3_USB_BASE_ADDR; 146 void __iomem *usbother_base = usb_base + USB_OTHERREGS_OFFSET; 147 u32 val; 148 149 val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); 150 #if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2 151 /* mx6qarm2 seems to required a different setting*/ 152 val &= ~UCTRL_OVER_CUR_POL; 153 #else 154 val |= UCTRL_OVER_CUR_POL; 155 #endif 156 __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); 157 158 val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); 159 val |= UCTRL_OVER_CUR_DIS; 160 __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); 161 } 162 163 int ehci_hcd_init(void) 164 { 165 struct usb_ehci *ehci; 166 167 enable_usboh3_clk(1); 168 mdelay(1); 169 170 /* Do board specific initialization */ 171 board_ehci_hcd_init(CONFIG_MXC_USB_PORT); 172 173 #if CONFIG_MXC_USB_PORT == 1 174 /* USB Host 1 */ 175 usbh1_power_config(); 176 usbh1_oc_config(); 177 usbh1_internal_phy_clock_gate(1); 178 usbh1_phy_enable(); 179 #else 180 #error "MXC USB port not yet supported" 181 #endif 182 183 ehci = (struct usb_ehci *)(USBOH3_USB_BASE_ADDR + 184 (0x200 * CONFIG_MXC_USB_PORT)); 185 hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 186 hcor = (struct ehci_hcor *)((uint32_t)hccr + 187 HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 188 setbits_le32(&ehci->usbmode, CM_HOST); 189 190 __raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 191 setbits_le32(&ehci->portsc, USB_EN); 192 193 mdelay(10); 194 195 return 0; 196 } 197 198 int ehci_hcd_stop(void) 199 { 200 return 0; 201 } 202