1 /* 2 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de> 3 * Copyright (C) 2010 Freescale Semiconductor, Inc. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <usb.h> 10 #include <errno.h> 11 #include <linux/compiler.h> 12 #include <usb/ehci-fsl.h> 13 #include <asm/io.h> 14 #include <asm/arch/imx-regs.h> 15 #include <asm/arch/clock.h> 16 #include <asm/imx-common/iomux-v3.h> 17 18 #include "ehci.h" 19 20 #define USB_OTGREGS_OFFSET 0x000 21 #define USB_H1REGS_OFFSET 0x200 22 #define USB_H2REGS_OFFSET 0x400 23 #define USB_H3REGS_OFFSET 0x600 24 #define USB_OTHERREGS_OFFSET 0x800 25 26 #define USB_H1_CTRL_OFFSET 0x04 27 28 #define USBPHY_CTRL 0x00000030 29 #define USBPHY_CTRL_SET 0x00000034 30 #define USBPHY_CTRL_CLR 0x00000038 31 #define USBPHY_CTRL_TOG 0x0000003c 32 33 #define USBPHY_PWD 0x00000000 34 #define USBPHY_CTRL_SFTRST 0x80000000 35 #define USBPHY_CTRL_CLKGATE 0x40000000 36 #define USBPHY_CTRL_ENUTMILEVEL3 0x00008000 37 #define USBPHY_CTRL_ENUTMILEVEL2 0x00004000 38 #define USBPHY_CTRL_OTG_ID 0x08000000 39 40 #define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000 41 #define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000 42 43 #define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000 44 #define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000 45 #define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000 46 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040 47 48 49 #define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */ 50 #define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */ 51 52 /* USBCMD */ 53 #define UCMD_RUN_STOP (1 << 0) /* controller run/stop */ 54 #define UCMD_RESET (1 << 1) /* controller reset */ 55 56 static const unsigned phy_bases[] = { 57 USB_PHY0_BASE_ADDR, 58 USB_PHY1_BASE_ADDR, 59 }; 60 61 static void usb_internal_phy_clock_gate(int index, int on) 62 { 63 void __iomem *phy_reg; 64 65 if (index >= ARRAY_SIZE(phy_bases)) 66 return; 67 68 phy_reg = (void __iomem *)phy_bases[index]; 69 phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET; 70 writel(USBPHY_CTRL_CLKGATE, phy_reg); 71 } 72 73 static void usb_power_config(int index) 74 { 75 struct anatop_regs __iomem *anatop = 76 (struct anatop_regs __iomem *)ANATOP_BASE_ADDR; 77 void __iomem *chrg_detect; 78 void __iomem *pll_480_ctrl_clr; 79 void __iomem *pll_480_ctrl_set; 80 81 switch (index) { 82 case 0: 83 chrg_detect = &anatop->usb1_chrg_detect; 84 pll_480_ctrl_clr = &anatop->usb1_pll_480_ctrl_clr; 85 pll_480_ctrl_set = &anatop->usb1_pll_480_ctrl_set; 86 break; 87 case 1: 88 chrg_detect = &anatop->usb2_chrg_detect; 89 pll_480_ctrl_clr = &anatop->usb2_pll_480_ctrl_clr; 90 pll_480_ctrl_set = &anatop->usb2_pll_480_ctrl_set; 91 break; 92 default: 93 return; 94 } 95 /* 96 * Some phy and power's special controls 97 * 1. The external charger detector needs to be disabled 98 * or the signal at DP will be poor 99 * 2. The PLL's power and output to usb 100 * is totally controlled by IC, so the Software only needs 101 * to enable them at initializtion. 102 */ 103 writel(ANADIG_USB2_CHRG_DETECT_EN_B | 104 ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B, 105 chrg_detect); 106 107 writel(ANADIG_USB2_PLL_480_CTRL_BYPASS, 108 pll_480_ctrl_clr); 109 110 writel(ANADIG_USB2_PLL_480_CTRL_ENABLE | 111 ANADIG_USB2_PLL_480_CTRL_POWER | 112 ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS, 113 pll_480_ctrl_set); 114 } 115 116 /* Return 0 : host node, <>0 : device mode */ 117 static int usb_phy_enable(int index, struct usb_ehci *ehci) 118 { 119 void __iomem *phy_reg; 120 void __iomem *phy_ctrl; 121 void __iomem *usb_cmd; 122 123 if (index >= ARRAY_SIZE(phy_bases)) 124 return 0; 125 126 phy_reg = (void __iomem *)phy_bases[index]; 127 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 128 usb_cmd = (void __iomem *)&ehci->usbcmd; 129 130 /* Stop then Reset */ 131 clrbits_le32(usb_cmd, UCMD_RUN_STOP); 132 while (readl(usb_cmd) & UCMD_RUN_STOP) 133 ; 134 135 setbits_le32(usb_cmd, UCMD_RESET); 136 while (readl(usb_cmd) & UCMD_RESET) 137 ; 138 139 /* Reset USBPHY module */ 140 setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST); 141 udelay(10); 142 143 /* Remove CLKGATE and SFTRST */ 144 clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST); 145 udelay(10); 146 147 /* Power up the PHY */ 148 writel(0, phy_reg + USBPHY_PWD); 149 /* enable FS/LS device */ 150 setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 | 151 USBPHY_CTRL_ENUTMILEVEL3); 152 153 return 0; 154 } 155 156 /* Base address for this IP block is 0x02184800 */ 157 struct usbnc_regs { 158 u32 ctrl[4]; /* otg/host1-3 */ 159 u32 uh2_hsic_ctrl; 160 u32 uh3_hsic_ctrl; 161 u32 otg_phy_ctrl_0; 162 u32 uh1_phy_ctrl_0; 163 }; 164 165 static void usb_oc_config(int index) 166 { 167 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR + 168 USB_OTHERREGS_OFFSET); 169 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]); 170 171 #if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2 172 /* mx6qarm2 seems to required a different setting*/ 173 clrbits_le32(ctrl, UCTRL_OVER_CUR_POL); 174 #else 175 setbits_le32(ctrl, UCTRL_OVER_CUR_POL); 176 #endif 177 178 setbits_le32(ctrl, UCTRL_OVER_CUR_DIS); 179 } 180 181 int usb_phy_mode(int port) 182 { 183 void __iomem *phy_reg; 184 void __iomem *phy_ctrl; 185 u32 val; 186 187 phy_reg = (void __iomem *)phy_bases[port]; 188 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL); 189 190 val = readl(phy_ctrl); 191 192 if (val & USBPHY_CTRL_OTG_ID) 193 return USB_INIT_DEVICE; 194 else 195 return USB_INIT_HOST; 196 } 197 198 /** 199 * board_ehci_hcd_init - override usb phy mode 200 * @port: usb host/otg port 201 * 202 * Target board specific, override usb_phy_mode. 203 * When usb-otg is used as usb host port, iomux pad usb_otg_id can be 204 * left disconnected in this case usb_phy_mode will not be able to identify 205 * the phy mode that usb port is used. 206 * Machine file overrides board_usb_phy_mode. 207 * 208 * Return: USB_INIT_DEVICE or USB_INIT_HOST 209 */ 210 int __weak board_usb_phy_mode(int port) 211 { 212 return usb_phy_mode(port); 213 } 214 215 /** 216 * board_ehci_hcd_init - set usb vbus voltage 217 * @port: usb otg port 218 * 219 * Target board specific, setup iomux pad to setup supply vbus voltage 220 * for usb otg port. Machine board file overrides board_ehci_hcd_init 221 * 222 * Return: 0 Success 223 */ 224 int __weak board_ehci_hcd_init(int port) 225 { 226 return 0; 227 } 228 229 /** 230 * board_ehci_power - enables/disables usb vbus voltage 231 * @port: usb otg port 232 * @on: on/off vbus voltage 233 * 234 * Enables/disables supply vbus voltage for usb otg port. 235 * Machine board file overrides board_ehci_power 236 * 237 * Return: 0 Success 238 */ 239 int __weak board_ehci_power(int port, int on) 240 { 241 return 0; 242 } 243 244 int ehci_hcd_init(int index, enum usb_init_type init, 245 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 246 { 247 enum usb_init_type type; 248 struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR + 249 (0x200 * index)); 250 251 if (index > 3) 252 return -EINVAL; 253 enable_usboh3_clk(1); 254 mdelay(1); 255 256 /* Do board specific initialization */ 257 board_ehci_hcd_init(index); 258 259 usb_power_config(index); 260 usb_oc_config(index); 261 usb_internal_phy_clock_gate(index, 1); 262 usb_phy_enable(index, ehci); 263 type = board_usb_phy_mode(index); 264 265 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 266 *hcor = (struct ehci_hcor *)((uint32_t)*hccr + 267 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 268 269 if ((type == init) || (type == USB_INIT_DEVICE)) 270 board_ehci_power(index, (type == USB_INIT_DEVICE) ? 0 : 1); 271 if (type != init) 272 return -ENODEV; 273 if (type == USB_INIT_DEVICE) 274 return 0; 275 setbits_le32(&ehci->usbmode, CM_HOST); 276 writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc); 277 setbits_le32(&ehci->portsc, USB_EN); 278 279 mdelay(10); 280 281 return 0; 282 } 283 284 int ehci_hcd_stop(int index) 285 { 286 return 0; 287 } 288