sys/arm/lpc/lpc_ohci.c

   1 /*-
   2  * Copyright (c) 2011 Jakub Wojciech Klama <jceel@FreeBSD.org>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27 #include <sys/cdefs.h>
  28 __FBSDID("$FreeBSD$");
  29
  30 #include <sys/stdint.h>
  31 #include <sys/stddef.h>
  32 #include <sys/param.h>
  33 #include <sys/queue.h>
  34 #include <sys/types.h>
  35 #include <sys/systm.h>
  36 #include <sys/kernel.h>
  37 #include <sys/bus.h>
  38 #include <sys/module.h>
  39 #include <sys/lock.h>
  40 #include <sys/mutex.h>
  41 #include <sys/condvar.h>
  42 #include <sys/sysctl.h>
  43 #include <sys/rman.h>
  44 #include <sys/sx.h>
  45 #include <sys/unistd.h>
  46 #include <sys/callout.h>
  47 #include <sys/malloc.h>
  48 #include <sys/priv.h>
  49
  50 #include <sys/kdb.h>
  51
  52 #include <dev/ofw/ofw_bus.h>
  53 #include <dev/ofw/ofw_bus_subr.h>
  54
  55 #include <dev/usb/usb.h>
  56 #include <dev/usb/usbdi.h>
  57
  58 #include <dev/usb/usb_core.h>
  59 #include <dev/usb/usb_busdma.h>
  60 #include <dev/usb/usb_process.h>
  61 #include <dev/usb/usb_util.h>
  62
  63 #include <dev/usb/usb_controller.h>
  64 #include <dev/usb/usb_bus.h>
  65 #include <dev/usb/controller/ohci.h>
  66 #include <dev/usb/controller/ohcireg.h>
  67
  68 #include <arm/lpc/lpcreg.h>
  69 #include <arm/lpc/lpcvar.h>
  70
  71 #define I2C_START_BIT           (1 << 8)
  72 #define I2C_STOP_BIT            (1 << 9)
  73 #define I2C_READ                0x01
  74 #define I2C_WRITE               0x00
  75 #define DUMMY_BYTE              0x55
  76
  77 #define lpc_otg_read_4(_sc, _reg)                                       \
  78     bus_space_read_4(_sc->sc_io_tag, _sc->sc_io_hdl, _reg)
  79 #define lpc_otg_write_4(_sc, _reg, _value)                              \
  80     bus_space_write_4(_sc->sc_io_tag, _sc->sc_io_hdl, _reg, _value)
  81 #define lpc_otg_wait_write_4(_sc, _wreg, _sreg, _value)                 \
  82     do {                                                                \
  83         lpc_otg_write_4(_sc, _wreg, _value);                            \
  84         while ((lpc_otg_read_4(_sc, _sreg) & _value) != _value);        \
  85     } while (0);
  86
  87 static int lpc_ohci_probe(device_t dev);
  88 static int lpc_ohci_attach(device_t dev);
  89 static int lpc_ohci_detach(device_t dev);
  90
  91 static void lpc_otg_i2c_reset(struct ohci_softc *);
  92
  93 static int lpc_isp3101_read(struct ohci_softc *, int);
  94 static void lpc_isp3101_write(struct ohci_softc *, int, int);
  95 static void lpc_isp3101_clear(struct ohci_softc *, int, int);
  96 static void lpc_isp3101_configure(device_t dev, struct ohci_softc *);
  97
  98 static int
  99 lpc_ohci_probe(device_t dev)
 100 {
 101         if (!ofw_bus_is_compatible(dev, "lpc,usb-ohci"))
 102                 return (ENXIO);
 103
 104         device_set_desc(dev, "LPC32x0 USB OHCI controller");
 105         return (BUS_PROBE_DEFAULT);
 106 }
 107
 108 static int
 109 lpc_ohci_attach(device_t dev)
 110 {
 111         struct ohci_softc *sc = device_get_softc(dev);
 112         int err;
 113         int rid;
 114         int i = 0;
 115         uint32_t usbctrl;
 116         uint32_t otgstatus;
 117
 118         sc->sc_bus.parent = dev;
 119         sc->sc_bus.devices = sc->sc_devices;
 120         sc->sc_bus.devices_max = OHCI_MAX_DEVICES;
 121
 122         if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
 123             &ohci_iterate_hw_softc))
 124                 return (ENOMEM);
 125
 126         rid = 0;
 127         sc->sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
 128         if (!sc->sc_io_res) {
 129                 device_printf(dev, "cannot map OHCI register space\n");
 130                 goto fail;
 131         }
 132
 133         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
 134         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
 135         sc->sc_io_size = rman_get_size(sc->sc_io_res);
 136
 137         rid = 0;
 138         sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
 139         if (sc->sc_irq_res == NULL) {
 140                 device_printf(dev, "cannot allocate interrupt\n");
 141                 goto fail;
 142         }
 143
 144         sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
 145         if (!(sc->sc_bus.bdev))
 146                 goto fail;
 147
 148         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
 149         strlcpy(sc->sc_vendor, "NXP", sizeof(sc->sc_vendor));
 150
 151         err = bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
 152             NULL, (void *)ohci_interrupt, sc, &sc->sc_intr_hdl);
 153         if (err) {
 154                 sc->sc_intr_hdl = NULL;
 155                 goto fail;
 156         }
 157
 158         usbctrl = lpc_pwr_read(dev, LPC_CLKPWR_USB_CTRL);
 159         usbctrl |= LPC_CLKPWR_USB_CTRL_SLAVE_HCLK | LPC_CLKPWR_USB_CTRL_BUSKEEPER;
 160         lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
 161
 162         /* Enable OTG I2C clock */
 163         lpc_otg_wait_write_4(sc, LPC_OTG_CLOCK_CTRL,
 164             LPC_OTG_CLOCK_STATUS, LPC_OTG_CLOCK_CTRL_I2C_EN);
 165
 166         /* Reset OTG I2C bus */
 167         lpc_otg_i2c_reset(sc);
 168
 169         lpc_isp3101_configure(dev, sc);
 170
 171         /* Configure PLL */
 172         usbctrl &= ~(LPC_CLKPWR_USB_CTRL_CLK_EN1 | LPC_CLKPWR_USB_CTRL_CLK_EN2);
 173         lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
 174
 175         usbctrl |= LPC_CLKPWR_USB_CTRL_CLK_EN1;
 176         lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
 177
 178         usbctrl |= LPC_CLKPWR_USB_CTRL_FDBKDIV(192-1);
 179         usbctrl |= LPC_CLKPWR_USB_CTRL_POSTDIV(1);
 180         usbctrl |= LPC_CLKPWR_USB_CTRL_PLL_PDOWN;
 181
 182         lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
 183         do {
 184                 usbctrl = lpc_pwr_read(dev, LPC_CLKPWR_USB_CTRL);
 185                 if (i++ > 100000) {
 186                         device_printf(dev, "USB OTG PLL doesn't lock!\n");
 187                         goto fail;
 188                 }
 189         } while ((usbctrl & LPC_CLKPWR_USB_CTRL_PLL_LOCK) == 0);
 190
 191         usbctrl |= LPC_CLKPWR_USB_CTRL_CLK_EN2;
 192         usbctrl |= LPC_CLKPWR_USB_CTRL_HOST_NEED_CLK_EN;
 193         lpc_pwr_write(dev, LPC_CLKPWR_USB_CTRL, usbctrl);
 194         lpc_otg_wait_write_4(sc, LPC_OTG_CLOCK_CTRL, LPC_OTG_CLOCK_STATUS,
 195             (LPC_OTG_CLOCK_CTRL_AHB_EN | LPC_OTG_CLOCK_CTRL_OTG_EN |
 196             LPC_OTG_CLOCK_CTRL_I2C_EN | LPC_OTG_CLOCK_CTRL_HOST_EN));
 197
 198         otgstatus = lpc_otg_read_4(sc, LPC_OTG_STATUS);
 199         lpc_otg_write_4(sc, LPC_OTG_STATUS, otgstatus |
 200             LPC_OTG_STATUS_HOST_EN);
 201
 202         lpc_isp3101_write(sc, LPC_ISP3101_OTG_CONTROL_1,
 203             LPC_ISP3101_OTG1_VBUS_DRV);
 204
 205         err = ohci_init(sc);
 206         if (err)
 207                 goto fail;
 208
 209         err = device_probe_and_attach(sc->sc_bus.bdev);
 210         if (err)
 211                 goto fail;
 212
 213         return (0);
 214
 215 fail:
 216         if (sc->sc_intr_hdl)
 217                 bus_teardown_intr(dev, sc->sc_irq_res, sc->sc_intr_hdl);
 218         if (sc->sc_irq_res)
 219                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_irq_res);
 220         if (sc->sc_io_res)
 221                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_io_res);
 222
 223         return (ENXIO);
 224 }
 225
 226 static int
 227 lpc_isp3101_read(struct ohci_softc *sc, int reg)
 228 {
 229         int status;
 230         int i = 0;
 231
 232         lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX,
 233             (LPC_ISP3101_I2C_ADDR << 1) | I2C_START_BIT);
 234         lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, reg);
 235         lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, (LPC_ISP3101_I2C_ADDR << 1) |
 236             I2C_START_BIT | I2C_READ);
 237         lpc_otg_write_4(sc, LPC_OTG_I2C_TXRX, I2C_STOP_BIT | DUMMY_BYTE);
 238
 239         do {
 240                 status = lpc_otg_read_4(sc, LPC_OTG_I2C_STATUS);
 241                 i++;
 242         } while ((status & LPC_OTG_I2C_STATUS_TDI) == 0 || i < 100000);
 243
 244         lpc_otg_write_4(sc, LPC_OTG_I2C_STATUS, LPC_OTG_I2C_STATUS_TDI);
 245
 246         return (lpc_otg_read_4(sc, LPC_OTG_I2C_TXRX) & 0xff);
 247 }
 248
 249 static void
 250 lpc_otg_i2c_reset(struct ohci_softc *sc)
 251 {
 252         int ctrl;
 253         int i = 0;
 254
 255         lpc_otg_write_4(sc, LPC_OTG_I2C_CLKHI, 0x3f);
 256         lpc_otg_write_4(sc, LPC_OTG_I2C_CLKLO, 0x3f);
 257
 258         ctrl = lpc_otg_read_4(sc, LPC_OTG_I2C_CTRL);
 259         lpc_otg_write_4(sc, LPC_OTG_I2C_CTRL, ctrl | LPC_OTG_I2C_CTRL_SRST);
 260
 261         do {
 262                 ctrl = lpc_otg_read_4(sc, LPC_OTG_I2C_CTRL);
 263                 i++;
 264         } while (ctrl & LPC_OTG_I2C_CTRL_SRST);
 265 }
 266
 267 static void
 268 lpc_isp3101_write(struct ohci_softc *sc, int reg, int value)
 269 {
 270         int status;
 271         int i = 0;
 272
 273         bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
 274             (LPC_ISP3101_I2C_ADDR << 1) | I2C_START_BIT);
 275         bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
 276             (reg | I2C_WRITE));
 277         bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_TXRX,
 278             (value | I2C_STOP_BIT));
 279
 280         do {
 281                 status = bus_space_read_4(sc->sc_io_tag, sc->sc_io_hdl,
 282                     LPC_OTG_I2C_STATUS);
 283                 i++;
 284         } while ((status & LPC_OTG_I2C_STATUS_TDI) == 0 || i < 100000);
 285
 286         bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl, LPC_OTG_I2C_STATUS,
 287             LPC_OTG_I2C_STATUS_TDI);
 288 }
 289
 290 static __inline void
 291 lpc_isp3101_clear(struct ohci_softc *sc, int reg, int value)
 292 {
 293         lpc_isp3101_write(sc, (reg | LPC_ISP3101_REG_CLEAR_ADDR), value);
 294 }
 295
 296 static void
 297 lpc_isp3101_configure(device_t dev, struct ohci_softc *sc)
 298 {
 299         lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_UART_EN);
 300         lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_1, ~LPC_ISP3101_MC1_SPEED_REG);
 301         lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_SPEED_REG);
 302         lpc_isp3101_clear(sc, LPC_ISP3101_MODE_CONTROL_2, ~0);
 303         lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_2,
 304             (LPC_ISP3101_MC2_BI_DI | LPC_ISP3101_MC2_PSW_EN
 305             | LPC_ISP3101_MC2_SPD_SUSP_CTRL));
 306
 307         lpc_isp3101_clear(sc, LPC_ISP3101_OTG_CONTROL_1, ~0);
 308         lpc_isp3101_write(sc, LPC_ISP3101_MODE_CONTROL_1, LPC_ISP3101_MC1_DAT_SE0);
 309         lpc_isp3101_write(sc, LPC_ISP3101_OTG_CONTROL_1,
 310             (LPC_ISP3101_OTG1_DM_PULLDOWN | LPC_ISP3101_OTG1_DP_PULLDOWN));
 311
 312         lpc_isp3101_clear(sc, LPC_ISP3101_OTG_CONTROL_1,
 313             (LPC_ISP3101_OTG1_DM_PULLUP | LPC_ISP3101_OTG1_DP_PULLUP));
 314
 315         lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_LATCH, ~0);
 316         lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_FALLING, ~0);
 317         lpc_isp3101_clear(sc, LPC_ISP3101_OTG_INTR_RISING, ~0);
 318
 319         device_printf(dev,
 320             "ISP3101 PHY <vendor:0x%04x, product:0x%04x, version:0x%04x>\n",
 321             (lpc_isp3101_read(sc, 0x00) | (lpc_isp3101_read(sc, 0x01) << 8)),
 322             (lpc_isp3101_read(sc, 0x03) | (lpc_isp3101_read(sc, 0x04) << 8)),
 323             (lpc_isp3101_read(sc, 0x14) | (lpc_isp3101_read(sc, 0x15) << 8)));
 324 }
 325
 326 static int
 327 lpc_ohci_detach(device_t dev)
 328 {
 329         return (0);
 330 }
 331
 332
 333 static device_method_t lpc_ohci_methods[] = {
 334         /* Device interface */
 335         DEVMETHOD(device_probe,         lpc_ohci_probe),
 336         DEVMETHOD(device_attach,        lpc_ohci_attach),
 337         DEVMETHOD(device_detach,        lpc_ohci_detach),
 338         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
 339
 340         /* Bus interface */
 341         DEVMETHOD(bus_print_child,      bus_generic_print_child),
 342         { 0, 0 }
 343 };
 344
 345 static driver_t lpc_ohci_driver = {
 346         "ohci",
 347         lpc_ohci_methods,
 348         sizeof(struct ohci_softc),
 349 };
 350
 351 static devclass_t lpc_ohci_devclass;
 352
 353 DRIVER_MODULE(ohci, simplebus, lpc_ohci_driver, lpc_ohci_devclass, 0, 0);
 354 MODULE_DEPEND(ohci, usb, 1, 1, 1);