2 * Copyright (c) 2013 Ruslan Bukin <br@bsdpad.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
37 #include <sys/condvar.h>
41 #include <dev/ofw/ofw_bus.h>
42 #include <dev/ofw/ofw_bus_subr.h>
44 #include <dev/usb/usb.h>
45 #include <dev/usb/usbdi.h>
46 #include <dev/usb/usb_busdma.h>
47 #include <dev/usb/usb_process.h>
48 #include <dev/usb/usb_controller.h>
49 #include <dev/usb/usb_bus.h>
50 #include <dev/usb/controller/ehci.h>
51 #include <dev/usb/controller/ehcireg.h>
53 #include <dev/fdt/fdt_common.h>
55 #include <machine/bus.h>
56 #include <machine/resource.h>
60 #include "opt_platform.h"
68 #define EXYNOS5_PWR_USBHOST_PHY 0x708
69 #define PHY_POWER_ON 1
70 #define PHY_POWER_OFF 0
73 #define EXYNOS5_SYSREG_USB2_PHY 0x0
74 #define USB2_MODE_HOST 0x1
77 #define HOST_CTRL_CLK_24MHZ (5 << 16)
78 #define HOST_CTRL_CLK_MASK (7 << 16)
79 #define HOST_CTRL_SIDDQ (1 << 6)
80 #define HOST_CTRL_SLEEP (1 << 5)
81 #define HOST_CTRL_SUSPEND (1 << 4)
82 #define HOST_CTRL_RESET_LINK (1 << 1)
83 #define HOST_CTRL_RESET_PHY (1 << 0)
84 #define HOST_CTRL_RESET_PHY_ALL (1U << 31)
86 /* Forward declarations */
87 static int exynos_ehci_attach(device_t dev);
88 static int exynos_ehci_detach(device_t dev);
89 static int exynos_ehci_probe(device_t dev);
91 struct exynos_ehci_softc {
94 struct resource *res[5];
95 bus_space_tag_t host_bst;
96 bus_space_tag_t pwr_bst;
97 bus_space_tag_t sysreg_bst;
98 bus_space_handle_t host_bsh;
99 bus_space_handle_t pwr_bsh;
100 bus_space_handle_t sysreg_bsh;
104 static struct resource_spec exynos_ehci_spec[] = {
105 { SYS_RES_MEMORY, 0, RF_ACTIVE },
106 { SYS_RES_MEMORY, 1, RF_ACTIVE },
107 { SYS_RES_MEMORY, 2, RF_ACTIVE },
108 { SYS_RES_MEMORY, 3, RF_ACTIVE },
109 { SYS_RES_IRQ, 0, RF_ACTIVE },
113 static device_method_t ehci_methods[] = {
114 /* Device interface */
115 DEVMETHOD(device_probe, exynos_ehci_probe),
116 DEVMETHOD(device_attach, exynos_ehci_attach),
117 DEVMETHOD(device_detach, exynos_ehci_detach),
118 DEVMETHOD(device_suspend, bus_generic_suspend),
119 DEVMETHOD(device_resume, bus_generic_resume),
120 DEVMETHOD(device_shutdown, bus_generic_shutdown),
123 DEVMETHOD(bus_print_child, bus_generic_print_child),
128 /* kobj_class definition */
129 static driver_t ehci_driver = {
135 static devclass_t ehci_devclass;
137 DRIVER_MODULE(ehci, simplebus, ehci_driver, ehci_devclass, 0, 0);
138 MODULE_DEPEND(ehci, usb, 1, 1, 1);
144 exynos_ehci_probe(device_t dev)
147 if (!ofw_bus_status_okay(dev))
150 if (ofw_bus_is_compatible(dev, "exynos,usb-ehci") == 0)
153 device_set_desc(dev, "Exynos integrated USB controller");
154 return (BUS_PROBE_DEFAULT);
158 gpio_ctrl(struct exynos_ehci_softc *esc, int dir, int power)
162 /* Get the GPIO device, we need this to give power to USB */
163 gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
164 if (gpio_dev == NULL) {
165 device_printf(esc->dev, "cant find gpio_dev\n");
170 GPIO_PIN_SET(gpio_dev, PIN_USB, GPIO_PIN_HIGH);
172 GPIO_PIN_SET(gpio_dev, PIN_USB, GPIO_PIN_LOW);
175 GPIO_PIN_SETFLAGS(gpio_dev, PIN_USB, GPIO_PIN_OUTPUT);
177 GPIO_PIN_SETFLAGS(gpio_dev, PIN_USB, GPIO_PIN_INPUT);
183 phy_init(struct exynos_ehci_softc *esc)
187 gpio_ctrl(esc, GPIO_INPUT, 1);
189 /* set USB HOST mode */
190 bus_space_write_4(esc->sysreg_bst, esc->sysreg_bsh,
191 EXYNOS5_SYSREG_USB2_PHY, USB2_MODE_HOST);
194 bus_space_write_4(esc->pwr_bst, esc->pwr_bsh,
195 EXYNOS5_PWR_USBHOST_PHY, PHY_POWER_ON);
197 reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
198 reg &= ~(HOST_CTRL_CLK_MASK |
199 HOST_CTRL_RESET_PHY |
200 HOST_CTRL_RESET_PHY_ALL |
205 reg |= (HOST_CTRL_CLK_24MHZ |
206 HOST_CTRL_RESET_LINK);
207 bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
211 reg = bus_space_read_4(esc->host_bst, esc->host_bsh, 0x0);
212 reg &= ~(HOST_CTRL_RESET_LINK);
213 bus_space_write_4(esc->host_bst, esc->host_bsh, 0x0, reg);
215 gpio_ctrl(esc, GPIO_OUTPUT, 1);
221 exynos_ehci_attach(device_t dev)
223 struct exynos_ehci_softc *esc;
225 bus_space_handle_t bsh;
228 esc = device_get_softc(dev);
231 sc->sc_bus.parent = dev;
232 sc->sc_bus.devices = sc->sc_devices;
233 sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
234 sc->sc_bus.dma_bits = 32;
236 if (bus_alloc_resources(dev, exynos_ehci_spec, esc->res)) {
237 device_printf(dev, "could not allocate resources\n");
242 sc->sc_io_tag = rman_get_bustag(esc->res[0]);
243 bsh = rman_get_bushandle(esc->res[0]);
244 sc->sc_io_size = rman_get_size(esc->res[0]);
246 /* EHCI HOST ctrl registers */
247 esc->host_bst = rman_get_bustag(esc->res[1]);
248 esc->host_bsh = rman_get_bushandle(esc->res[1]);
251 esc->pwr_bst = rman_get_bustag(esc->res[2]);
252 esc->pwr_bsh = rman_get_bushandle(esc->res[2]);
255 esc->sysreg_bst = rman_get_bustag(esc->res[3]);
256 esc->sysreg_bsh = rman_get_bushandle(esc->res[3]);
258 /* get all DMA memory */
259 if (usb_bus_mem_alloc_all(&sc->sc_bus, USB_GET_DMA_TAG(dev),
260 &ehci_iterate_hw_softc))
264 * Set handle to USB related registers subregion used by
265 * generic EHCI driver.
267 err = bus_space_subregion(sc->sc_io_tag, bsh, 0x0,
268 sc->sc_io_size, &sc->sc_io_hdl);
274 /* Setup interrupt handler */
275 err = bus_setup_intr(dev, esc->res[4], INTR_TYPE_BIO | INTR_MPSAFE,
276 NULL, (driver_intr_t *)ehci_interrupt, sc,
279 device_printf(dev, "Could not setup irq, "
285 sc->sc_bus.bdev = device_add_child(dev, "usbus", -1);
286 if (!sc->sc_bus.bdev) {
287 device_printf(dev, "Could not add USB device\n");
288 err = bus_teardown_intr(dev, esc->res[4],
291 device_printf(dev, "Could not tear down irq,"
295 device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
297 strlcpy(sc->sc_vendor, "Samsung", sizeof(sc->sc_vendor));
301 sc->sc_flags |= EHCI_SCFLG_DONEINIT;
302 err = device_probe_and_attach(sc->sc_bus.bdev);
304 device_printf(dev, "USB init failed err=%d\n", err);
306 device_delete_child(dev, sc->sc_bus.bdev);
307 sc->sc_bus.bdev = NULL;
309 err = bus_teardown_intr(dev, esc->res[4],
312 device_printf(dev, "Could not tear down irq,"
320 exynos_ehci_detach(device_t dev)
322 struct exynos_ehci_softc *esc;
326 esc = device_get_softc(dev);
329 if (sc->sc_flags & EHCI_SCFLG_DONEINIT)
333 * only call ehci_detach() after ehci_init()
335 if (sc->sc_flags & EHCI_SCFLG_DONEINIT) {
337 sc->sc_flags &= ~EHCI_SCFLG_DONEINIT;
341 * Disable interrupts that might have been switched on in
344 if (sc->sc_io_tag && sc->sc_io_hdl)
345 bus_space_write_4(sc->sc_io_tag, sc->sc_io_hdl,
348 if (esc->res[4] && sc->sc_intr_hdl) {
349 err = bus_teardown_intr(dev, esc->res[4],
352 device_printf(dev, "Could not tear down irq,"
356 sc->sc_intr_hdl = NULL;
359 if (sc->sc_bus.bdev) {
360 device_delete_child(dev, sc->sc_bus.bdev);
361 sc->sc_bus.bdev = NULL;
364 /* During module unload there are lots of children leftover */
365 device_delete_children(dev);
367 bus_release_resources(dev, exynos_ehci_spec, esc->res);