1 /* 2 * SAMSUNG EXYNOS USB HOST EHCI Controller 3 * 4 * Copyright (C) 2012 Samsung Electronics Co.Ltd 5 * Vivek Gautam <gautam.vivek@samsung.com> 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <dm.h> 12 #include <fdtdec.h> 13 #include <libfdt.h> 14 #include <malloc.h> 15 #include <usb.h> 16 #include <asm/arch/cpu.h> 17 #include <asm/arch/ehci.h> 18 #include <asm/arch/system.h> 19 #include <asm/arch/power.h> 20 #include <asm/gpio.h> 21 #include <asm-generic/errno.h> 22 #include <linux/compat.h> 23 #include "ehci.h" 24 25 /* Declare global data pointer */ 26 DECLARE_GLOBAL_DATA_PTR; 27 28 struct exynos_ehci_platdata { 29 struct usb_platdata usb_plat; 30 fdt_addr_t hcd_base; 31 fdt_addr_t phy_base; 32 struct gpio_desc vbus_gpio; 33 }; 34 35 /** 36 * Contains pointers to register base addresses 37 * for the usb controller. 38 */ 39 struct exynos_ehci { 40 struct ehci_ctrl ctrl; 41 struct exynos_usb_phy *usb; 42 struct ehci_hccr *hcd; 43 }; 44 45 static int ehci_usb_ofdata_to_platdata(struct udevice *dev) 46 { 47 struct exynos_ehci_platdata *plat = dev_get_platdata(dev); 48 const void *blob = gd->fdt_blob; 49 unsigned int node; 50 int depth; 51 52 /* 53 * Get the base address for XHCI controller from the device node 54 */ 55 plat->hcd_base = dev_get_addr(dev); 56 if (plat->hcd_base == FDT_ADDR_T_NONE) { 57 debug("Can't get the XHCI register base address\n"); 58 return -ENXIO; 59 } 60 61 depth = 0; 62 node = fdtdec_next_compatible_subnode(blob, dev->of_offset, 63 COMPAT_SAMSUNG_EXYNOS_USB_PHY, &depth); 64 if (node <= 0) { 65 debug("XHCI: Can't get device node for usb3-phy controller\n"); 66 return -ENODEV; 67 } 68 69 /* 70 * Get the base address for usbphy from the device node 71 */ 72 plat->phy_base = fdtdec_get_addr(blob, node, "reg"); 73 if (plat->phy_base == FDT_ADDR_T_NONE) { 74 debug("Can't get the usbphy register address\n"); 75 return -ENXIO; 76 } 77 78 /* Vbus gpio */ 79 gpio_request_by_name(dev, "samsung,vbus-gpio", 0, 80 &plat->vbus_gpio, GPIOD_IS_OUT); 81 82 return 0; 83 } 84 85 static void exynos5_setup_usb_phy(struct exynos_usb_phy *usb) 86 { 87 u32 hsic_ctrl; 88 89 clrbits_le32(&usb->usbphyctrl0, 90 HOST_CTRL0_FSEL_MASK | 91 HOST_CTRL0_COMMONON_N | 92 /* HOST Phy setting */ 93 HOST_CTRL0_PHYSWRST | 94 HOST_CTRL0_PHYSWRSTALL | 95 HOST_CTRL0_SIDDQ | 96 HOST_CTRL0_FORCESUSPEND | 97 HOST_CTRL0_FORCESLEEP); 98 99 setbits_le32(&usb->usbphyctrl0, 100 /* Setting up the ref freq */ 101 (CLK_24MHZ << 16) | 102 /* HOST Phy setting */ 103 HOST_CTRL0_LINKSWRST | 104 HOST_CTRL0_UTMISWRST); 105 udelay(10); 106 clrbits_le32(&usb->usbphyctrl0, 107 HOST_CTRL0_LINKSWRST | 108 HOST_CTRL0_UTMISWRST); 109 110 /* HSIC Phy Setting */ 111 hsic_ctrl = (HSIC_CTRL_FORCESUSPEND | 112 HSIC_CTRL_FORCESLEEP | 113 HSIC_CTRL_SIDDQ); 114 115 clrbits_le32(&usb->hsicphyctrl1, hsic_ctrl); 116 clrbits_le32(&usb->hsicphyctrl2, hsic_ctrl); 117 118 hsic_ctrl = (((HSIC_CTRL_REFCLKDIV_12 & HSIC_CTRL_REFCLKDIV_MASK) 119 << HSIC_CTRL_REFCLKDIV_SHIFT) 120 | ((HSIC_CTRL_REFCLKSEL & HSIC_CTRL_REFCLKSEL_MASK) 121 << HSIC_CTRL_REFCLKSEL_SHIFT) 122 | HSIC_CTRL_UTMISWRST); 123 124 setbits_le32(&usb->hsicphyctrl1, hsic_ctrl); 125 setbits_le32(&usb->hsicphyctrl2, hsic_ctrl); 126 127 udelay(10); 128 129 clrbits_le32(&usb->hsicphyctrl1, HSIC_CTRL_PHYSWRST | 130 HSIC_CTRL_UTMISWRST); 131 132 clrbits_le32(&usb->hsicphyctrl2, HSIC_CTRL_PHYSWRST | 133 HSIC_CTRL_UTMISWRST); 134 135 udelay(20); 136 137 /* EHCI Ctrl setting */ 138 setbits_le32(&usb->ehcictrl, 139 EHCICTRL_ENAINCRXALIGN | 140 EHCICTRL_ENAINCR4 | 141 EHCICTRL_ENAINCR8 | 142 EHCICTRL_ENAINCR16); 143 } 144 145 static void exynos4412_setup_usb_phy(struct exynos4412_usb_phy *usb) 146 { 147 writel(CLK_24MHZ, &usb->usbphyclk); 148 149 clrbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 | 150 PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 | 151 PHYPWR_NORMAL_MASK_PHY0)); 152 153 setbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST)); 154 udelay(10); 155 clrbits_le32(&usb->usbphyrstcon, (RSTCON_HOSTPHY_SWRST | RSTCON_SWRST)); 156 } 157 158 static void setup_usb_phy(struct exynos_usb_phy *usb) 159 { 160 set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN); 161 162 set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN); 163 164 if (cpu_is_exynos5()) 165 exynos5_setup_usb_phy(usb); 166 else if (cpu_is_exynos4()) 167 if (proid_is_exynos4412()) 168 exynos4412_setup_usb_phy((struct exynos4412_usb_phy *) 169 usb); 170 } 171 172 static void exynos5_reset_usb_phy(struct exynos_usb_phy *usb) 173 { 174 u32 hsic_ctrl; 175 176 /* HOST_PHY reset */ 177 setbits_le32(&usb->usbphyctrl0, 178 HOST_CTRL0_PHYSWRST | 179 HOST_CTRL0_PHYSWRSTALL | 180 HOST_CTRL0_SIDDQ | 181 HOST_CTRL0_FORCESUSPEND | 182 HOST_CTRL0_FORCESLEEP); 183 184 /* HSIC Phy reset */ 185 hsic_ctrl = (HSIC_CTRL_FORCESUSPEND | 186 HSIC_CTRL_FORCESLEEP | 187 HSIC_CTRL_SIDDQ | 188 HSIC_CTRL_PHYSWRST); 189 190 setbits_le32(&usb->hsicphyctrl1, hsic_ctrl); 191 setbits_le32(&usb->hsicphyctrl2, hsic_ctrl); 192 } 193 194 static void exynos4412_reset_usb_phy(struct exynos4412_usb_phy *usb) 195 { 196 setbits_le32(&usb->usbphyctrl, (PHYPWR_NORMAL_MASK_HSIC0 | 197 PHYPWR_NORMAL_MASK_HSIC1 | PHYPWR_NORMAL_MASK_PHY1 | 198 PHYPWR_NORMAL_MASK_PHY0)); 199 } 200 201 /* Reset the EHCI host controller. */ 202 static void reset_usb_phy(struct exynos_usb_phy *usb) 203 { 204 if (cpu_is_exynos5()) 205 exynos5_reset_usb_phy(usb); 206 else if (cpu_is_exynos4()) 207 if (proid_is_exynos4412()) 208 exynos4412_reset_usb_phy((struct exynos4412_usb_phy *) 209 usb); 210 211 set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE); 212 } 213 214 static int ehci_usb_probe(struct udevice *dev) 215 { 216 struct exynos_ehci_platdata *plat = dev_get_platdata(dev); 217 struct exynos_ehci *ctx = dev_get_priv(dev); 218 struct ehci_hcor *hcor; 219 220 ctx->hcd = (struct ehci_hccr *)plat->hcd_base; 221 ctx->usb = (struct exynos_usb_phy *)plat->phy_base; 222 hcor = (struct ehci_hcor *)((uint32_t)ctx->hcd + 223 HC_LENGTH(ehci_readl(&ctx->hcd->cr_capbase))); 224 225 /* setup the Vbus gpio here */ 226 if (dm_gpio_is_valid(&plat->vbus_gpio)) 227 dm_gpio_set_value(&plat->vbus_gpio, 1); 228 229 setup_usb_phy(ctx->usb); 230 231 return ehci_register(dev, ctx->hcd, hcor, NULL, 0, USB_INIT_HOST); 232 } 233 234 static int ehci_usb_remove(struct udevice *dev) 235 { 236 struct exynos_ehci *ctx = dev_get_priv(dev); 237 int ret; 238 239 ret = ehci_deregister(dev); 240 if (ret) 241 return ret; 242 reset_usb_phy(ctx->usb); 243 244 return 0; 245 } 246 247 static const struct udevice_id ehci_usb_ids[] = { 248 { .compatible = "samsung,exynos-ehci" }, 249 { } 250 }; 251 252 U_BOOT_DRIVER(usb_ehci) = { 253 .name = "ehci_exynos", 254 .id = UCLASS_USB, 255 .of_match = ehci_usb_ids, 256 .ofdata_to_platdata = ehci_usb_ofdata_to_platdata, 257 .probe = ehci_usb_probe, 258 .remove = ehci_usb_remove, 259 .ops = &ehci_usb_ops, 260 .priv_auto_alloc_size = sizeof(struct exynos_ehci), 261 .platdata_auto_alloc_size = sizeof(struct exynos_ehci_platdata), 262 .flags = DM_FLAG_ALLOC_PRIV_DMA, 263 }; 264