1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2009, 2011, 2016 Freescale Semiconductor, Inc. 4 * 5 * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB 6 * 7 * Author: Tor Krill tor@excito.com 8 */ 9 10 #include <common.h> 11 #include <pci.h> 12 #include <usb.h> 13 #include <asm/io.h> 14 #include <usb/ehci-ci.h> 15 #include <hwconfig.h> 16 #include <fsl_usb.h> 17 #include <fdt_support.h> 18 #include <dm.h> 19 20 #include "ehci.h" 21 22 DECLARE_GLOBAL_DATA_PTR; 23 24 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT 25 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1 26 #endif 27 28 #ifdef CONFIG_DM_USB 29 struct ehci_fsl_priv { 30 struct ehci_ctrl ehci; 31 fdt_addr_t hcd_base; 32 char *phy_type; 33 }; 34 #endif 35 36 static void set_txfifothresh(struct usb_ehci *, u32); 37 #ifdef CONFIG_DM_USB 38 static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci, 39 struct ehci_hccr *hccr, struct ehci_hcor *hcor); 40 #else 41 static int ehci_fsl_init(int index, struct usb_ehci *ehci, 42 struct ehci_hccr *hccr, struct ehci_hcor *hcor); 43 #endif 44 45 /* Check USB PHY clock valid */ 46 static int usb_phy_clk_valid(struct usb_ehci *ehci) 47 { 48 if (!((in_be32(&ehci->control) & PHY_CLK_VALID) || 49 in_be32(&ehci->prictrl))) { 50 printf("USB PHY clock invalid!\n"); 51 return 0; 52 } else { 53 return 1; 54 } 55 } 56 57 #ifdef CONFIG_DM_USB 58 static int ehci_fsl_ofdata_to_platdata(struct udevice *dev) 59 { 60 struct ehci_fsl_priv *priv = dev_get_priv(dev); 61 const void *prop; 62 63 prop = fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "phy_type", 64 NULL); 65 if (prop) { 66 priv->phy_type = (char *)prop; 67 debug("phy_type %s\n", priv->phy_type); 68 } 69 70 return 0; 71 } 72 73 static int ehci_fsl_init_after_reset(struct ehci_ctrl *ctrl) 74 { 75 struct usb_ehci *ehci = NULL; 76 struct ehci_fsl_priv *priv = container_of(ctrl, struct ehci_fsl_priv, 77 ehci); 78 79 ehci = (struct usb_ehci *)priv->hcd_base; 80 if (ehci_fsl_init(priv, ehci, priv->ehci.hccr, priv->ehci.hcor) < 0) 81 return -ENXIO; 82 83 return 0; 84 } 85 86 static const struct ehci_ops fsl_ehci_ops = { 87 .init_after_reset = ehci_fsl_init_after_reset, 88 }; 89 90 static int ehci_fsl_probe(struct udevice *dev) 91 { 92 struct ehci_fsl_priv *priv = dev_get_priv(dev); 93 struct usb_ehci *ehci = NULL; 94 struct ehci_hccr *hccr; 95 struct ehci_hcor *hcor; 96 struct ehci_ctrl *ehci_ctrl = &priv->ehci; 97 98 /* 99 * Get the base address for EHCI controller from the device node 100 */ 101 priv->hcd_base = devfdt_get_addr(dev); 102 if (priv->hcd_base == FDT_ADDR_T_NONE) { 103 debug("Can't get the EHCI register base address\n"); 104 return -ENXIO; 105 } 106 ehci = (struct usb_ehci *)priv->hcd_base; 107 hccr = (struct ehci_hccr *)(&ehci->caplength); 108 hcor = (struct ehci_hcor *) 109 ((void *)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 110 111 ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275(); 112 113 if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0) 114 return -ENXIO; 115 116 debug("ehci-fsl: init hccr %p and hcor %p hc_length %d\n", 117 (void *)hccr, (void *)hcor, 118 HC_LENGTH(ehci_readl(&hccr->cr_capbase))); 119 120 return ehci_register(dev, hccr, hcor, &fsl_ehci_ops, 0, USB_INIT_HOST); 121 } 122 123 static const struct udevice_id ehci_usb_ids[] = { 124 { .compatible = "fsl-usb2-mph", }, 125 { .compatible = "fsl-usb2-dr", }, 126 { } 127 }; 128 129 U_BOOT_DRIVER(ehci_fsl) = { 130 .name = "ehci_fsl", 131 .id = UCLASS_USB, 132 .of_match = ehci_usb_ids, 133 .ofdata_to_platdata = ehci_fsl_ofdata_to_platdata, 134 .probe = ehci_fsl_probe, 135 .remove = ehci_deregister, 136 .ops = &ehci_usb_ops, 137 .platdata_auto_alloc_size = sizeof(struct usb_platdata), 138 .priv_auto_alloc_size = sizeof(struct ehci_fsl_priv), 139 .flags = DM_FLAG_ALLOC_PRIV_DMA, 140 }; 141 #else 142 /* 143 * Create the appropriate control structures to manage 144 * a new EHCI host controller. 145 * 146 * Excerpts from linux ehci fsl driver. 147 */ 148 int ehci_hcd_init(int index, enum usb_init_type init, 149 struct ehci_hccr **hccr, struct ehci_hcor **hcor) 150 { 151 struct ehci_ctrl *ehci_ctrl = container_of(hccr, 152 struct ehci_ctrl, hccr); 153 struct usb_ehci *ehci = NULL; 154 155 switch (index) { 156 case 0: 157 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR; 158 break; 159 case 1: 160 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR; 161 break; 162 default: 163 printf("ERROR: wrong controller index!!\n"); 164 return -EINVAL; 165 }; 166 167 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength); 168 *hcor = (struct ehci_hcor *)((uint32_t) *hccr + 169 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase))); 170 171 ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275(); 172 173 return ehci_fsl_init(index, ehci, *hccr, *hcor); 174 } 175 176 /* 177 * Destroy the appropriate control structures corresponding 178 * the the EHCI host controller. 179 */ 180 int ehci_hcd_stop(int index) 181 { 182 return 0; 183 } 184 #endif 185 186 #ifdef CONFIG_DM_USB 187 static int ehci_fsl_init(struct ehci_fsl_priv *priv, struct usb_ehci *ehci, 188 struct ehci_hccr *hccr, struct ehci_hcor *hcor) 189 #else 190 static int ehci_fsl_init(int index, struct usb_ehci *ehci, 191 struct ehci_hccr *hccr, struct ehci_hcor *hcor) 192 #endif 193 { 194 const char *phy_type = NULL; 195 #ifndef CONFIG_DM_USB 196 size_t len; 197 char current_usb_controller[5]; 198 #endif 199 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY 200 char usb_phy[5]; 201 202 usb_phy[0] = '\0'; 203 #endif 204 if (has_erratum_a007075()) { 205 /* 206 * A 5ms delay is needed after applying soft-reset to the 207 * controller to let external ULPI phy come out of reset. 208 * This delay needs to be added before re-initializing 209 * the controller after soft-resetting completes 210 */ 211 mdelay(5); 212 } 213 214 /* Set to Host mode */ 215 setbits_le32(&ehci->usbmode, CM_HOST); 216 217 out_be32(&ehci->snoop1, SNOOP_SIZE_2GB); 218 out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB); 219 220 /* Init phy */ 221 #ifdef CONFIG_DM_USB 222 if (priv->phy_type) 223 phy_type = priv->phy_type; 224 #else 225 memset(current_usb_controller, '\0', 5); 226 snprintf(current_usb_controller, sizeof(current_usb_controller), 227 "usb%d", index+1); 228 229 if (hwconfig_sub(current_usb_controller, "phy_type")) 230 phy_type = hwconfig_subarg(current_usb_controller, 231 "phy_type", &len); 232 #endif 233 else 234 phy_type = env_get("usb_phy_type"); 235 236 if (!phy_type) { 237 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY 238 /* if none specified assume internal UTMI */ 239 strcpy(usb_phy, "utmi"); 240 phy_type = usb_phy; 241 #else 242 printf("WARNING: USB phy type not defined !!\n"); 243 return -1; 244 #endif 245 } 246 247 if (!strncmp(phy_type, "utmi", 4)) { 248 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY) 249 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, 250 PHY_CLK_SEL_UTMI); 251 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, 252 UTMI_PHY_EN); 253 udelay(1000); /* delay required for PHY Clk to appear */ 254 #endif 255 out_le32(&(hcor)->or_portsc[0], PORT_PTS_UTMI); 256 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, 257 USB_EN); 258 } else { 259 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK, 260 PHY_CLK_SEL_ULPI); 261 clrsetbits_be32(&ehci->control, UTMI_PHY_EN | 262 CONTROL_REGISTER_W1C_MASK, USB_EN); 263 udelay(1000); /* delay required for PHY Clk to appear */ 264 if (!usb_phy_clk_valid(ehci)) 265 return -EINVAL; 266 out_le32(&(hcor)->or_portsc[0], PORT_PTS_ULPI); 267 } 268 269 out_be32(&ehci->prictrl, 0x0000000c); 270 out_be32(&ehci->age_cnt_limit, 0x00000040); 271 out_be32(&ehci->sictrl, 0x00000001); 272 273 in_le32(&ehci->usbmode); 274 275 if (has_erratum_a007798()) 276 set_txfifothresh(ehci, TXFIFOTHRESH); 277 278 if (has_erratum_a004477()) { 279 /* 280 * When reset is issued while any ULPI transaction is ongoing 281 * then it may result to corruption of ULPI Function Control 282 * Register which eventually causes phy clock to enter low 283 * power mode which stops the clock. Thus delay is required 284 * before reset to let ongoing ULPI transaction complete. 285 */ 286 udelay(1); 287 } 288 return 0; 289 } 290 291 /* 292 * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register 293 * to counter DDR latencies in writing data into Tx buffer. 294 * This prevents Tx buffer from getting underrun 295 */ 296 static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh) 297 { 298 u32 cmd; 299 cmd = ehci_readl(&ehci->txfilltuning); 300 cmd &= ~TXFIFO_THRESH_MASK; 301 cmd |= TXFIFO_THRESH(txfifo_thresh); 302 ehci_writel(&ehci->txfilltuning, cmd); 303 } 304