arch/powerpc/platforms/83xx/usb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Freescale 83xx USB SOC setup code
   4  *
   5  * Copyright (C) 2007 Freescale Semiconductor, Inc.
   6  * Author: Li Yang
   7  */
   8
   9
  10 #include <linux/stddef.h>
  11 #include <linux/kernel.h>
  12 #include <linux/errno.h>
  13 #include <linux/of.h>
  14
  15 #include <asm/io.h>
  16 #include <asm/prom.h>
  17 #include <sysdev/fsl_soc.h>
  18
  19 #include "mpc83xx.h"
  20
  21
  22 #ifdef CONFIG_PPC_MPC834x
  23 int mpc834x_usb_cfg(void)
  24 {
  25         unsigned long sccr, sicrl, sicrh;
  26         void __iomem *immap;
  27         struct device_node *np = NULL;
  28         int port0_is_dr = 0, port1_is_dr = 0;
  29         const void *prop, *dr_mode;
  30
  31         immap = ioremap(get_immrbase(), 0x1000);
  32         if (!immap)
  33                 return -ENOMEM;
  34
  35         /* Read registers */
  36         /* Note: DR and MPH must use the same clock setting in SCCR */
  37         sccr = in_be32(immap + MPC83XX_SCCR_OFFS) & ~MPC83XX_SCCR_USB_MASK;
  38         sicrl = in_be32(immap + MPC83XX_SICRL_OFFS) & ~MPC834X_SICRL_USB_MASK;
  39         sicrh = in_be32(immap + MPC83XX_SICRH_OFFS) & ~MPC834X_SICRH_USB_UTMI;
  40
  41         np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
  42         if (np) {
  43                 sccr |= MPC83XX_SCCR_USB_DRCM_11;  /* 1:3 */
  44
  45                 prop = of_get_property(np, "phy_type", NULL);
  46                 port1_is_dr = 1;
  47                 if (prop && (!strcmp(prop, "utmi") ||
  48                                         !strcmp(prop, "utmi_wide"))) {
  49                         sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
  50                         sicrh |= MPC834X_SICRH_USB_UTMI;
  51                         port0_is_dr = 1;
  52                 } else if (prop && !strcmp(prop, "serial")) {
  53                         dr_mode = of_get_property(np, "dr_mode", NULL);
  54                         if (dr_mode && !strcmp(dr_mode, "otg")) {
  55                                 sicrl |= MPC834X_SICRL_USB0 | MPC834X_SICRL_USB1;
  56                                 port0_is_dr = 1;
  57                         } else {
  58                                 sicrl |= MPC834X_SICRL_USB1;
  59                         }
  60                 } else if (prop && !strcmp(prop, "ulpi")) {
  61                         sicrl |= MPC834X_SICRL_USB1;
  62                 } else {
  63                         printk(KERN_WARNING "834x USB PHY type not supported\n");
  64                 }
  65                 of_node_put(np);
  66         }
  67         np = of_find_compatible_node(NULL, NULL, "fsl-usb2-mph");
  68         if (np) {
  69                 sccr |= MPC83XX_SCCR_USB_MPHCM_11; /* 1:3 */
  70
  71                 prop = of_get_property(np, "port0", NULL);
  72                 if (prop) {
  73                         if (port0_is_dr)
  74                                 printk(KERN_WARNING
  75                                         "834x USB port0 can't be used by both DR and MPH!\n");
  76                         sicrl &= ~MPC834X_SICRL_USB0;
  77                 }
  78                 prop = of_get_property(np, "port1", NULL);
  79                 if (prop) {
  80                         if (port1_is_dr)
  81                                 printk(KERN_WARNING
  82                                         "834x USB port1 can't be used by both DR and MPH!\n");
  83                         sicrl &= ~MPC834X_SICRL_USB1;
  84                 }
  85                 of_node_put(np);
  86         }
  87
  88         /* Write back */
  89         out_be32(immap + MPC83XX_SCCR_OFFS, sccr);
  90         out_be32(immap + MPC83XX_SICRL_OFFS, sicrl);
  91         out_be32(immap + MPC83XX_SICRH_OFFS, sicrh);
  92
  93         iounmap(immap);
  94         return 0;
  95 }
  96 #endif /* CONFIG_PPC_MPC834x */
  97
  98 #ifdef CONFIG_PPC_MPC831x
  99 int mpc831x_usb_cfg(void)
 100 {
 101         u32 temp;
 102         void __iomem *immap, *usb_regs;
 103         struct device_node *np = NULL;
 104         struct device_node *immr_node = NULL;
 105         const void *prop;
 106         struct resource res;
 107         int ret = 0;
 108 #ifdef CONFIG_USB_OTG
 109         const void *dr_mode;
 110 #endif
 111
 112         np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
 113         if (!np)
 114                 return -ENODEV;
 115         prop = of_get_property(np, "phy_type", NULL);
 116
 117         /* Map IMMR space for pin and clock settings */
 118         immap = ioremap(get_immrbase(), 0x1000);
 119         if (!immap) {
 120                 of_node_put(np);
 121                 return -ENOMEM;
 122         }
 123
 124         /* Configure clock */
 125         immr_node = of_get_parent(np);
 126         if (immr_node && (of_device_is_compatible(immr_node, "fsl,mpc8315-immr") ||
 127                         of_device_is_compatible(immr_node, "fsl,mpc8308-immr")))
 128                 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
 129                                 MPC8315_SCCR_USB_MASK,
 130                                 MPC8315_SCCR_USB_DRCM_01);
 131         else
 132                 clrsetbits_be32(immap + MPC83XX_SCCR_OFFS,
 133                                 MPC83XX_SCCR_USB_MASK,
 134                                 MPC83XX_SCCR_USB_DRCM_11);
 135
 136         /* Configure pin mux for ULPI.  There is no pin mux for UTMI */
 137         if (prop && !strcmp(prop, "ulpi")) {
 138                 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
 139                         clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 140                                         MPC8308_SICRH_USB_MASK,
 141                                         MPC8308_SICRH_USB_ULPI);
 142                 } else if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr")) {
 143                         clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
 144                                         MPC8315_SICRL_USB_MASK,
 145                                         MPC8315_SICRL_USB_ULPI);
 146                         clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 147                                         MPC8315_SICRH_USB_MASK,
 148                                         MPC8315_SICRH_USB_ULPI);
 149                 } else {
 150                         clrsetbits_be32(immap + MPC83XX_SICRL_OFFS,
 151                                         MPC831X_SICRL_USB_MASK,
 152                                         MPC831X_SICRL_USB_ULPI);
 153                         clrsetbits_be32(immap + MPC83XX_SICRH_OFFS,
 154                                         MPC831X_SICRH_USB_MASK,
 155                                         MPC831X_SICRH_USB_ULPI);
 156                 }
 157         }
 158
 159         iounmap(immap);
 160
 161         of_node_put(immr_node);
 162
 163         /* Map USB SOC space */
 164         ret = of_address_to_resource(np, 0, &res);
 165         if (ret) {
 166                 of_node_put(np);
 167                 return ret;
 168         }
 169         usb_regs = ioremap(res.start, resource_size(&res));
 170
 171         /* Using on-chip PHY */
 172         if (prop && (!strcmp(prop, "utmi_wide") ||
 173                      !strcmp(prop, "utmi"))) {
 174                 u32 refsel;
 175
 176                 if (of_device_is_compatible(immr_node, "fsl,mpc8308-immr"))
 177                         goto out;
 178
 179                 if (of_device_is_compatible(immr_node, "fsl,mpc8315-immr"))
 180                         refsel = CONTROL_REFSEL_24MHZ;
 181                 else
 182                         refsel = CONTROL_REFSEL_48MHZ;
 183                 /* Set UTMI_PHY_EN and REFSEL */
 184                 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS,
 185                                 CONTROL_UTMI_PHY_EN | refsel);
 186         /* Using external UPLI PHY */
 187         } else if (prop && !strcmp(prop, "ulpi")) {
 188                 /* Set PHY_CLK_SEL to ULPI */
 189                 temp = CONTROL_PHY_CLK_SEL_ULPI;
 190 #ifdef CONFIG_USB_OTG
 191                 /* Set OTG_PORT */
 192                 if (!of_device_is_compatible(immr_node, "fsl,mpc8308-immr")) {
 193                         dr_mode = of_get_property(np, "dr_mode", NULL);
 194                         if (dr_mode && !strcmp(dr_mode, "otg"))
 195                                 temp |= CONTROL_OTG_PORT;
 196                 }
 197 #endif /* CONFIG_USB_OTG */
 198                 out_be32(usb_regs + FSL_USB2_CONTROL_OFFS, temp);
 199         } else {
 200                 printk(KERN_WARNING "831x USB PHY type not supported\n");
 201                 ret = -EINVAL;
 202         }
 203
 204 out:
 205         iounmap(usb_regs);
 206         of_node_put(np);
 207         return ret;
 208 }
 209 #endif /* CONFIG_PPC_MPC831x */
 210
 211 #ifdef CONFIG_PPC_MPC837x
 212 int mpc837x_usb_cfg(void)
 213 {
 214         void __iomem *immap;
 215         struct device_node *np = NULL;
 216         const void *prop;
 217         int ret = 0;
 218
 219         np = of_find_compatible_node(NULL, NULL, "fsl-usb2-dr");
 220         if (!np || !of_device_is_available(np)) {
 221                 of_node_put(np);
 222                 return -ENODEV;
 223         }
 224         prop = of_get_property(np, "phy_type", NULL);
 225
 226         if (!prop || (strcmp(prop, "ulpi") && strcmp(prop, "serial"))) {
 227                 printk(KERN_WARNING "837x USB PHY type not supported\n");
 228                 of_node_put(np);
 229                 return -EINVAL;
 230         }
 231
 232         /* Map IMMR space for pin and clock settings */
 233         immap = ioremap(get_immrbase(), 0x1000);
 234         if (!immap) {
 235                 of_node_put(np);
 236                 return -ENOMEM;
 237         }
 238
 239         /* Configure clock */
 240         clrsetbits_be32(immap + MPC83XX_SCCR_OFFS, MPC837X_SCCR_USB_DRCM_11,
 241                         MPC837X_SCCR_USB_DRCM_11);
 242
 243         /* Configure pin mux for ULPI/serial */
 244         clrsetbits_be32(immap + MPC83XX_SICRL_OFFS, MPC837X_SICRL_USB_MASK,
 245                         MPC837X_SICRL_USB_ULPI);
 246
 247         iounmap(immap);
 248         of_node_put(np);
 249         return ret;
 250 }
 251 #endif /* CONFIG_PPC_MPC837x */