drivers/usb/host/ehci-mx5.c

   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
  17 #include "ehci.h"
  18
  19 #define MX5_USBOTHER_REGS_OFFSET 0x800
  20
  21
  22 #define MXC_OTG_OFFSET                  0
  23 #define MXC_H1_OFFSET                   0x200
  24 #define MXC_H2_OFFSET                   0x400
  25 #define MXC_H3_OFFSET                   0x600
  26
  27 #define MXC_USBCTRL_OFFSET              0
  28 #define MXC_USB_PHY_CTR_FUNC_OFFSET     0x8
  29 #define MXC_USB_PHY_CTR_FUNC2_OFFSET    0xc
  30 #define MXC_USB_CTRL_1_OFFSET           0x10
  31 #define MXC_USBH2CTRL_OFFSET            0x14
  32 #define MXC_USBH3CTRL_OFFSET            0x18
  33
  34 /* USB_CTRL */
  35 /* OTG wakeup intr enable */
  36 #define MXC_OTG_UCTRL_OWIE_BIT          (1 << 27)
  37 /* OTG power mask */
  38 #define MXC_OTG_UCTRL_OPM_BIT           (1 << 24)
  39 /* OTG power pin polarity */
  40 #define MXC_OTG_UCTRL_O_PWR_POL_BIT     (1 << 24)
  41 /* Host1 ULPI interrupt enable */
  42 #define MXC_H1_UCTRL_H1UIE_BIT          (1 << 12)
  43 /* HOST1 wakeup intr enable */
  44 #define MXC_H1_UCTRL_H1WIE_BIT          (1 << 11)
  45 /* HOST1 power mask */
  46 #define MXC_H1_UCTRL_H1PM_BIT           (1 << 8)
  47 /* HOST1 power pin polarity */
  48 #define MXC_H1_UCTRL_H1_PWR_POL_BIT     (1 << 8)
  49
  50 /* USB_PHY_CTRL_FUNC */
  51 /* OTG Polarity of Overcurrent */
  52 #define MXC_OTG_PHYCTRL_OC_POL_BIT      (1 << 9)
  53 /* OTG Disable Overcurrent Event */
  54 #define MXC_OTG_PHYCTRL_OC_DIS_BIT      (1 << 8)
  55 /* UH1 Polarity of Overcurrent */
  56 #define MXC_H1_OC_POL_BIT               (1 << 6)
  57 /* UH1 Disable Overcurrent Event */
  58 #define MXC_H1_OC_DIS_BIT               (1 << 5)
  59 /* OTG Power Pin Polarity */
  60 #define MXC_OTG_PHYCTRL_PWR_POL_BIT     (1 << 3)
  61
  62 /* USBH2CTRL */
  63 #define MXC_H2_UCTRL_H2_OC_POL_BIT      (1 << 31)
  64 #define MXC_H2_UCTRL_H2_OC_DIS_BIT      (1 << 30)
  65 #define MXC_H2_UCTRL_H2UIE_BIT          (1 << 8)
  66 #define MXC_H2_UCTRL_H2WIE_BIT          (1 << 7)
  67 #define MXC_H2_UCTRL_H2PM_BIT           (1 << 4)
  68 #define MXC_H2_UCTRL_H2_PWR_POL_BIT     (1 << 4)
  69
  70 /* USBH3CTRL */
  71 #define MXC_H3_UCTRL_H3_OC_POL_BIT      (1 << 31)
  72 #define MXC_H3_UCTRL_H3_OC_DIS_BIT      (1 << 30)
  73 #define MXC_H3_UCTRL_H3UIE_BIT          (1 << 8)
  74 #define MXC_H3_UCTRL_H3WIE_BIT          (1 << 7)
  75 #define MXC_H3_UCTRL_H3_PWR_POL_BIT     (1 << 4)
  76
  77 /* USB_CTRL_1 */
  78 #define MXC_USB_CTRL_UH1_EXT_CLK_EN     (1 << 25)
  79
  80 int mxc_set_usbcontrol(int port, unsigned int flags)
  81 {
  82         unsigned int v;
  83         void __iomem *usb_base = (void __iomem *)OTG_BASE_ADDR;
  84         void __iomem *usbother_base;
  85         int ret = 0;
  86
  87         usbother_base = usb_base + MX5_USBOTHER_REGS_OFFSET;
  88
  89         switch (port) {
  90         case 0: /* OTG port */
  91                 if (flags & MXC_EHCI_INTERNAL_PHY) {
  92                         v = __raw_readl(usbother_base +
  93                                         MXC_USB_PHY_CTR_FUNC_OFFSET);
  94                         if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
  95                                 v |= MXC_OTG_PHYCTRL_OC_POL_BIT;
  96                         else
  97                                 v &= ~MXC_OTG_PHYCTRL_OC_POL_BIT;
  98                         if (flags & MXC_EHCI_POWER_PINS_ENABLED)
  99                                 /* OC/USBPWR is used */
 100                                 v &= ~MXC_OTG_PHYCTRL_OC_DIS_BIT;
 101                         else
 102                                 /* OC/USBPWR is not used */
 103                                 v |= MXC_OTG_PHYCTRL_OC_DIS_BIT;
 104 #ifdef CONFIG_MX51
 105                         if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
 106                                 v |= MXC_OTG_PHYCTRL_PWR_POL_BIT;
 107                         else
 108                                 v &= ~MXC_OTG_PHYCTRL_PWR_POL_BIT;
 109 #endif
 110                         __raw_writel(v, usbother_base +
 111                                         MXC_USB_PHY_CTR_FUNC_OFFSET);
 112
 113                         v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
 114 #ifdef CONFIG_MX51
 115                         if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 116                                 v &= ~MXC_OTG_UCTRL_OPM_BIT;
 117                         else
 118                                 v |= MXC_OTG_UCTRL_OPM_BIT;
 119 #endif
 120 #ifdef CONFIG_MX53
 121                         if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
 122                                 v |= MXC_OTG_UCTRL_O_PWR_POL_BIT;
 123                         else
 124                                 v &= ~MXC_OTG_UCTRL_O_PWR_POL_BIT;
 125 #endif
 126                         __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
 127                 }
 128                 break;
 129         case 1: /* Host 1 ULPI */
 130 #ifdef CONFIG_MX51
 131                 /* The clock for the USBH1 ULPI port will come externally
 132                    from the PHY. */
 133                 v = __raw_readl(usbother_base + MXC_USB_CTRL_1_OFFSET);
 134                 __raw_writel(v | MXC_USB_CTRL_UH1_EXT_CLK_EN, usbother_base +
 135                                 MXC_USB_CTRL_1_OFFSET);
 136 #endif
 137
 138                 v = __raw_readl(usbother_base + MXC_USBCTRL_OFFSET);
 139 #ifdef CONFIG_MX51
 140                 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 141                         v &= ~MXC_H1_UCTRL_H1PM_BIT; /* H1 power mask unused */
 142                 else
 143                         v |= MXC_H1_UCTRL_H1PM_BIT; /* H1 power mask used */
 144 #endif
 145 #ifdef CONFIG_MX53
 146                 if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
 147                         v |= MXC_H1_UCTRL_H1_PWR_POL_BIT;
 148                 else
 149                         v &= ~MXC_H1_UCTRL_H1_PWR_POL_BIT;
 150 #endif
 151                 __raw_writel(v, usbother_base + MXC_USBCTRL_OFFSET);
 152
 153                 v = __raw_readl(usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
 154                 if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
 155                         v |= MXC_H1_OC_POL_BIT;
 156                 else
 157                         v &= ~MXC_H1_OC_POL_BIT;
 158                 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 159                         v &= ~MXC_H1_OC_DIS_BIT; /* OC is used */
 160                 else
 161                         v |= MXC_H1_OC_DIS_BIT; /* OC is not used */
 162                 __raw_writel(v, usbother_base + MXC_USB_PHY_CTR_FUNC_OFFSET);
 163
 164                 break;
 165         case 2: /* Host 2 ULPI */
 166                 v = __raw_readl(usbother_base + MXC_USBH2CTRL_OFFSET);
 167 #ifdef CONFIG_MX51
 168                 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 169                         v &= ~MXC_H2_UCTRL_H2PM_BIT; /* H2 power mask unused */
 170                 else
 171                         v |= MXC_H2_UCTRL_H2PM_BIT; /* H2 power mask used */
 172 #endif
 173 #ifdef CONFIG_MX53
 174                 if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
 175                         v |= MXC_H2_UCTRL_H2_OC_POL_BIT;
 176                 else
 177                         v &= ~MXC_H2_UCTRL_H2_OC_POL_BIT;
 178                 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 179                         v &= ~MXC_H2_UCTRL_H2_OC_DIS_BIT; /* OC is used */
 180                 else
 181                         v |= MXC_H2_UCTRL_H2_OC_DIS_BIT; /* OC is not used */
 182                 if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
 183                         v |= MXC_H2_UCTRL_H2_PWR_POL_BIT;
 184                 else
 185                         v &= ~MXC_H2_UCTRL_H2_PWR_POL_BIT;
 186 #endif
 187                 __raw_writel(v, usbother_base + MXC_USBH2CTRL_OFFSET);
 188                 break;
 189 #ifdef CONFIG_MX53
 190         case 3: /* Host 3 ULPI */
 191                 v = __raw_readl(usbother_base + MXC_USBH3CTRL_OFFSET);
 192                 if (flags & MXC_EHCI_OC_PIN_ACTIVE_LOW)
 193                         v |= MXC_H3_UCTRL_H3_OC_POL_BIT;
 194                 else
 195                         v &= ~MXC_H3_UCTRL_H3_OC_POL_BIT;
 196                 if (flags & MXC_EHCI_POWER_PINS_ENABLED)
 197                         v &= ~MXC_H3_UCTRL_H3_OC_DIS_BIT; /* OC is used */
 198                 else
 199                         v |= MXC_H3_UCTRL_H3_OC_DIS_BIT; /* OC is not used */
 200                 if (flags & MXC_EHCI_PWR_PIN_ACTIVE_HIGH)
 201                         v |= MXC_H3_UCTRL_H3_PWR_POL_BIT;
 202                 else
 203                         v &= ~MXC_H3_UCTRL_H3_PWR_POL_BIT;
 204                 __raw_writel(v, usbother_base + MXC_USBH3CTRL_OFFSET);
 205                 break;
 206 #endif
 207         }
 208
 209         return ret;
 210 }
 211
 212 int __weak board_ehci_hcd_init(int port)
 213 {
 214         return 0;
 215 }
 216
 217 void __weak board_ehci_hcd_postinit(struct usb_ehci *ehci, int port)
 218 {
 219 }
 220
 221 int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor **hcor)
 222 {
 223         struct usb_ehci *ehci;
 224
 225         set_usboh3_clk();
 226         enable_usboh3_clk(true);
 227         set_usb_phy_clk();
 228         enable_usb_phy1_clk(true);
 229         enable_usb_phy2_clk(true);
 230         mdelay(1);
 231
 232         /* Do board specific initialization */
 233         board_ehci_hcd_init(CONFIG_MXC_USB_PORT);
 234
 235         ehci = (struct usb_ehci *)(OTG_BASE_ADDR +
 236                 (0x200 * CONFIG_MXC_USB_PORT));
 237         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
 238         *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
 239                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
 240         setbits_le32(&ehci->usbmode, CM_HOST);
 241
 242         __raw_writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
 243         setbits_le32(&ehci->portsc, USB_EN);
 244
 245         mxc_set_usbcontrol(CONFIG_MXC_USB_PORT, CONFIG_MXC_USB_FLAGS);
 246         mdelay(10);
 247
 248         /* Do board specific post-initialization */
 249         board_ehci_hcd_postinit(ehci, CONFIG_MXC_USB_PORT);
 250
 251         return 0;
 252 }
 253
 254 int ehci_hcd_stop(int index)
 255 {
 256         return 0;
 257 }