arch/arm/mach-omap2/usb-fs.c

   1 /*
   2  * Platform level USB initialization for FS USB OTG controller on omap1 and 24xx
   3  *
   4  * Copyright (C) 2004 Texas Instruments, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/kernel.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/init.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/clk.h>
  28 #include <linux/err.h>
  29
  30 #include <asm/irq.h>
  31
  32 #include <plat/usb.h>
  33 #include <plat/board.h>
  34
  35 #include "control.h"
  36 #include "mux.h"
  37
  38 #define INT_USB_IRQ_GEN         INT_24XX_USB_IRQ_GEN
  39 #define INT_USB_IRQ_NISO        INT_24XX_USB_IRQ_NISO
  40 #define INT_USB_IRQ_ISO         INT_24XX_USB_IRQ_ISO
  41 #define INT_USB_IRQ_HGEN        INT_24XX_USB_IRQ_HGEN
  42 #define INT_USB_IRQ_OTG         INT_24XX_USB_IRQ_OTG
  43
  44 #if defined(CONFIG_ARCH_OMAP2)
  45
  46 #ifdef  CONFIG_USB_GADGET_OMAP
  47
  48 static struct resource udc_resources[] = {
  49         /* order is significant! */
  50         {               /* registers */
  51                 .start          = UDC_BASE,
  52                 .end            = UDC_BASE + 0xff,
  53                 .flags          = IORESOURCE_MEM,
  54         }, {            /* general IRQ */
  55                 .start          = INT_USB_IRQ_GEN,
  56                 .flags          = IORESOURCE_IRQ,
  57         }, {            /* PIO IRQ */
  58                 .start          = INT_USB_IRQ_NISO,
  59                 .flags          = IORESOURCE_IRQ,
  60         }, {            /* SOF IRQ */
  61                 .start          = INT_USB_IRQ_ISO,
  62                 .flags          = IORESOURCE_IRQ,
  63         },
  64 };
  65
  66 static u64 udc_dmamask = ~(u32)0;
  67
  68 static struct platform_device udc_device = {
  69         .name           = "omap_udc",
  70         .id             = -1,
  71         .dev = {
  72                 .dma_mask               = &udc_dmamask,
  73                 .coherent_dma_mask      = 0xffffffff,
  74         },
  75         .num_resources  = ARRAY_SIZE(udc_resources),
  76         .resource       = udc_resources,
  77 };
  78
  79 static inline void udc_device_init(struct omap_usb_config *pdata)
  80 {
  81         pdata->udc_device = &udc_device;
  82 }
  83
  84 #else
  85
  86 static inline void udc_device_init(struct omap_usb_config *pdata)
  87 {
  88 }
  89
  90 #endif
  91
  92 #if     defined(CONFIG_USB_OHCI_HCD) || defined(CONFIG_USB_OHCI_HCD_MODULE)
  93
  94 /* The dmamask must be set for OHCI to work */
  95 static u64 ohci_dmamask = ~(u32)0;
  96
  97 static struct resource ohci_resources[] = {
  98         {
  99                 .start  = OMAP_OHCI_BASE,
 100                 .end    = OMAP_OHCI_BASE + 0xff,
 101                 .flags  = IORESOURCE_MEM,
 102         },
 103         {
 104                 .start  = INT_USB_IRQ_HGEN,
 105                 .flags  = IORESOURCE_IRQ,
 106         },
 107 };
 108
 109 static struct platform_device ohci_device = {
 110         .name                   = "ohci",
 111         .id                     = -1,
 112         .dev = {
 113                 .dma_mask               = &ohci_dmamask,
 114                 .coherent_dma_mask      = 0xffffffff,
 115         },
 116         .num_resources  = ARRAY_SIZE(ohci_resources),
 117         .resource               = ohci_resources,
 118 };
 119
 120 static inline void ohci_device_init(struct omap_usb_config *pdata)
 121 {
 122         pdata->ohci_device = &ohci_device;
 123 }
 124
 125 #else
 126
 127 static inline void ohci_device_init(struct omap_usb_config *pdata)
 128 {
 129 }
 130
 131 #endif
 132
 133 #if     defined(CONFIG_USB_OTG) && defined(CONFIG_ARCH_OMAP_OTG)
 134
 135 static struct resource otg_resources[] = {
 136         /* order is significant! */
 137         {
 138                 .start          = OTG_BASE,
 139                 .end            = OTG_BASE + 0xff,
 140                 .flags          = IORESOURCE_MEM,
 141         }, {
 142                 .start          = INT_USB_IRQ_OTG,
 143                 .flags          = IORESOURCE_IRQ,
 144         },
 145 };
 146
 147 static struct platform_device otg_device = {
 148         .name           = "omap_otg",
 149         .id             = -1,
 150         .num_resources  = ARRAY_SIZE(otg_resources),
 151         .resource       = otg_resources,
 152 };
 153
 154 static inline void otg_device_init(struct omap_usb_config *pdata)
 155 {
 156         pdata->otg_device = &otg_device;
 157 }
 158
 159 #else
 160
 161 static inline void otg_device_init(struct omap_usb_config *pdata)
 162 {
 163 }
 164
 165 #endif
 166
 167 static void omap2_usb_devconf_clear(u8 port, u32 mask)
 168 {
 169         u32 r;
 170
 171         r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 172         r &= ~USBTXWRMODEI(port, mask);
 173         omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
 174 }
 175
 176 static void omap2_usb_devconf_set(u8 port, u32 mask)
 177 {
 178         u32 r;
 179
 180         r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 181         r |= USBTXWRMODEI(port, mask);
 182         omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
 183 }
 184
 185 static void omap2_usb2_disable_5pinbitll(void)
 186 {
 187         u32 r;
 188
 189         r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 190         r &= ~(USBTXWRMODEI(2, USB_BIDIR_TLL) | USBT2TLL5PI);
 191         omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
 192 }
 193
 194 static void omap2_usb2_enable_5pinunitll(void)
 195 {
 196         u32 r;
 197
 198         r = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
 199         r |= USBTXWRMODEI(2, USB_UNIDIR_TLL) | USBT2TLL5PI;
 200         omap_ctrl_writel(r, OMAP2_CONTROL_DEVCONF0);
 201 }
 202
 203 static u32 __init omap2_usb0_init(unsigned nwires, unsigned is_device)
 204 {
 205         u32     syscon1 = 0;
 206
 207         omap2_usb_devconf_clear(0, USB_BIDIR_TLL);
 208
 209         if (nwires == 0)
 210                 return 0;
 211
 212         if (is_device)
 213                 omap_mux_init_signal("usb0_puen", 0);
 214
 215         omap_mux_init_signal("usb0_dat", 0);
 216         omap_mux_init_signal("usb0_txen", 0);
 217         omap_mux_init_signal("usb0_se0", 0);
 218         if (nwires != 3)
 219                 omap_mux_init_signal("usb0_rcv", 0);
 220
 221         switch (nwires) {
 222         case 3:
 223                 syscon1 = 2;
 224                 omap2_usb_devconf_set(0, USB_BIDIR);
 225                 break;
 226         case 4:
 227                 syscon1 = 1;
 228                 omap2_usb_devconf_set(0, USB_BIDIR);
 229                 break;
 230         case 6:
 231                 syscon1 = 3;
 232                 omap_mux_init_signal("usb0_vp", 0);
 233                 omap_mux_init_signal("usb0_vm", 0);
 234                 omap2_usb_devconf_set(0, USB_UNIDIR);
 235                 break;
 236         default:
 237                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 238                         0, nwires);
 239         }
 240
 241         return syscon1 << 16;
 242 }
 243
 244 static u32 __init omap2_usb1_init(unsigned nwires)
 245 {
 246         u32     syscon1 = 0;
 247
 248         omap2_usb_devconf_clear(1, USB_BIDIR_TLL);
 249
 250         if (nwires == 0)
 251                 return 0;
 252
 253         /* NOTE:  board-specific code must set up pin muxing for usb1,
 254          * since each signal could come out on either of two balls.
 255          */
 256
 257         switch (nwires) {
 258         case 2:
 259                 /* NOTE: board-specific code must override this setting if
 260                  * this TLL link is not using DP/DM
 261                  */
 262                 syscon1 = 1;
 263                 omap2_usb_devconf_set(1, USB_BIDIR_TLL);
 264                 break;
 265         case 3:
 266                 syscon1 = 2;
 267                 omap2_usb_devconf_set(1, USB_BIDIR);
 268                 break;
 269         case 4:
 270                 syscon1 = 1;
 271                 omap2_usb_devconf_set(1, USB_BIDIR);
 272                 break;
 273         case 6:
 274         default:
 275                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 276                         1, nwires);
 277         }
 278
 279         return syscon1 << 20;
 280 }
 281
 282 static u32 __init omap2_usb2_init(unsigned nwires, unsigned alt_pingroup)
 283 {
 284         u32     syscon1 = 0;
 285
 286         omap2_usb2_disable_5pinbitll();
 287         alt_pingroup = 0;
 288
 289         /* NOTE omap1 erratum: must leave USB2_UNI_R set if usb0 in use */
 290         if (alt_pingroup || nwires == 0)
 291                 return 0;
 292
 293         omap_mux_init_signal("usb2_dat", 0);
 294         omap_mux_init_signal("usb2_se0", 0);
 295         if (nwires > 2)
 296                 omap_mux_init_signal("usb2_txen", 0);
 297         if (nwires > 3)
 298                 omap_mux_init_signal("usb2_rcv", 0);
 299
 300         switch (nwires) {
 301         case 2:
 302                 /* NOTE: board-specific code must override this setting if
 303                  * this TLL link is not using DP/DM
 304                  */
 305                 syscon1 = 1;
 306                 omap2_usb_devconf_set(2, USB_BIDIR_TLL);
 307                 break;
 308         case 3:
 309                 syscon1 = 2;
 310                 omap2_usb_devconf_set(2, USB_BIDIR);
 311                 break;
 312         case 4:
 313                 syscon1 = 1;
 314                 omap2_usb_devconf_set(2, USB_BIDIR);
 315                 break;
 316         case 5:
 317                 /* NOTE: board-specific code must mux this setting depending
 318                  * on TLL link using DP/DM.  Something must also
 319                  * set up OTG_SYSCON2.HMC_TLL{ATTACH,SPEED}
 320                  * 2420: hdq_sio.usb2_tllse0 or vlynq_rx0.usb2_tllse0
 321                  * 2430: hdq_sio.usb2_tllse0 or sdmmc2_dat0.usb2_tllse0
 322                  */
 323
 324                 syscon1 = 3;
 325                 omap2_usb2_enable_5pinunitll();
 326                 break;
 327         case 6:
 328         default:
 329                 printk(KERN_ERR "illegal usb%d %d-wire transceiver\n",
 330                         2, nwires);
 331         }
 332
 333         return syscon1 << 24;
 334 }
 335
 336 void __init omap2_usbfs_init(struct omap_usb_config *pdata)
 337 {
 338         struct clk *ick;
 339
 340         if (!cpu_is_omap24xx())
 341                 return;
 342
 343         ick = clk_get(NULL, "usb_l4_ick");
 344         if (IS_ERR(ick))
 345                 return;
 346
 347         clk_enable(ick);
 348         pdata->usb0_init = omap2_usb0_init;
 349         pdata->usb1_init = omap2_usb1_init;
 350         pdata->usb2_init = omap2_usb2_init;
 351         udc_device_init(pdata);
 352         ohci_device_init(pdata);
 353         otg_device_init(pdata);
 354         omap_otg_init(pdata);
 355         clk_disable(ick);
 356         clk_put(ick);
 357 }
 358
 359 #endif