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/imx-common/iomux-v3.h> 26 27 #include "ehci.h" 28 29 #define USB_OTGREGS_OFFSET 0x000 30 #define USB_H1REGS_OFFSET 0x200 31 #define USB_H2REGS_OFFSET 0x400 32 #define USB_H3REGS_OFFSET 0x600 33 #define USB_OTHERREGS_OFFSET 0x800 34 35 #define USB_H1_CTRL_OFFSET 0x04 36 37 #define USBPHY_CTRL 0x00000030 38 #define USBPHY_CTRL_SET 0x00000034 39 #define USBPHY_CTRL_CLR 0x00000038 40 #define USBPHY_CTRL_TOG 0x0000003c 41 42 #define USBPHY_PWD 0x00000000 43 #define USBPHY_CTRL_SFTRST 0x80000000 44 #define USBPHY_CTRL_CLKGATE 0x40000000 45 #define USBPHY_CTRL_ENUTMILEVEL3 0x00008000 46 #define USBPHY_CTRL_ENUTMILEVEL2 0x00004000 47 48 #define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000 49 #define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000 50 51 #define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000 52 #define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000 53 #define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000 54 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 55 56 57 #define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ 58 #define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ 59 60 /* USBCMD */ 61 #define UH1_USBCMD_OFFSET 0x140 62 #define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ 63 #define UCMD_RESET (1 << 1) /* controller reset */ 64 65 static void usbh1_internal_phy_clock_gate(int on) 66 { 67 void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; 68 69 phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET; 70 __raw_writel(USBPHY_CTRL_CLKGATE, phy_reg); 71 } 72 73 static void usbh1_power_config(void) 74 { 75 struct anatop_regs __iomem *anatop = 76 (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; 77 /* 78 * Some phy and power's special controls for host1 79 * 1. The external charger detector needs to be disabled 80 * or the signal at DP will be poor 81 * 2. The PLL's power and output to usb for host 1 82 * is totally controlled by IC, so the Software only needs 83 * to enable them at initializtion. 84 */ 85 __raw_writel(ANADIG_USB2_CHRG_DETECT_EN_B | 86 ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B, 87 &anatop->usb2_chrg_detect); 88 89 __raw_writel(ANADIG_USB2_PLL_480_CTRL_BYPASS, 90 &anatop->usb2_pll_480_ctrl_clr); 91 92 __raw_writel(ANADIG_USB2_PLL_480_CTRL_ENABLE | 93 ANADIG_USB2_PLL_480_CTRL_POWER | 94 ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS, 95 &anatop->usb2_pll_480_ctrl_set); 96 } 97 98 static int usbh1_phy_enable(void) 99 { 100 void __iomem *phy_reg = (void __iomem *)USB_PHY1_BASE_ADDR; 101 void __iomem *phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 102 void __iomem *usb_cmd = (void __iomem *)(USBOH3_USB_BASE_ADDR + 103 USB_H1REGS_OFFSET + 104 UH1_USBCMD_OFFSET); 105 u32 val; 106 107 /* Stop then Reset */ 108 val = __raw_readl(usb_cmd); 109 val &= ~UCMD_RUN_STOP; 110 __raw_writel(val, usb_cmd); 111 while (__raw_readl(usb_cmd) & UCMD_RUN_STOP) 112 ; 113 114 val = __raw_readl(usb_cmd); 115 val |= UCMD_RESET; 116 __raw_writel(val, usb_cmd); 117 while (__raw_readl(usb_cmd) & UCMD_RESET) 118 ; 119 120 /* Reset USBPHY module */ 121 val = __raw_readl(phy_ctrl); 122 val |= USBPHY_CTRL_SFTRST; 123 __raw_writel(val, phy_ctrl); 124 udelay(10); 125 126 /* Remove CLKGATE and SFTRST */ 127 val = __raw_readl(phy_ctrl); 128 val &= ~(USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); 129 __raw_writel(val, phy_ctrl); 130 udelay(10); 131 132 /* Power up the PHY */ 133 __raw_writel(0, phy_reg + USBPHY_PWD); 134 /* enable FS/LS device */ 135 val = __raw_readl(phy_reg + USBPHY_CTRL); 136 val |= (USBPHY_CTRL_ENUTMILEVEL2 | USBPHY_CTRL_ENUTMILEVEL3); 137 __raw_writel(val, phy_reg + USBPHY_CTRL); 138 139 return 0; 140 } 141 142 static void usbh1_oc_config(void) 143 { 144 void __iomem *usb_base = (void __iomem *)USBOH3_USB_BASE_ADDR; 145 void __iomem *usbother_base = usb_base + USB_OTHERREGS_OFFSET; 146 u32 val; 147 148 val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); 149 #if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2 150 /* mx6qarm2 seems to required a different setting*/ 151 val &= ~UCTRL_OVER_CUR_POL; 152 #else 153 val |= UCTRL_OVER_CUR_POL; 154 #endif 155 __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); 156 157 val = __raw_readl(usbother_base + USB_H1_CTRL_OFFSET); 158 val |= UCTRL_OVER_CUR_DIS; 159 __raw_writel(val, usbother_base + USB_H1_CTRL_OFFSET); 160 } 161 162 int __weak board_ehci_hcd_init(int port) 163 { 164 return 0; 165 } 166 167 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor) 168 { 169 struct usb_ehci *ehci; 170 171 enable_usboh3_clk(1); 172 mdelay(1); 173 174 /* Do board specific initialization */ 175 board_ehci_hcd_init(CONFIG_MXC_USB_PORT); 176 177 #if CONFIG_MXC_USB_PORT == 1 178 /* USB Host 1 */ 179 usbh1_power_config(); 180 usbh1_oc_config(); 181 usbh1_internal_phy_clock_gate(1); 182 usbh1_phy_enable(); 183 #else 184 #error "MXC USB port not yet supported" 185 #endif 186 187 ehci = (struct usb_ehci *)(USBOH3_USB_BASE_ADDR + 188 (0x200 * CONFIG_MXC_USB_PORT)); 189 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 190 *hcor = (struct ehci_hcor *)((uint32_t)*hccr + 191 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 192 setbits_le32(&ehci->usbmode, CM_HOST); 193 194 __raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 195 setbits_le32(&ehci->portsc, USB_EN); 196 197 mdelay(10); 198 199 return 0; 200 } 201 202 int ehci_hcd_stop(int index) 203 { 204 return 0; 205 } 206