svn commit: r283186 - head/sys/arm/amlogic/aml8726
Ganbold Tsagaankhuu
ganbold at FreeBSD.org
Thu May 21 07:23:51 UTC 2015
Author: ganbold
Date: Thu May 21 07:23:50 2015
New Revision: 283186
URL: https://svnweb.freebsd.org/changeset/base/283186
Log:
Add driver for usbclock generator for earlier amlogic chip.
Differential Revision: https://reviews.freebsd.org/D2590
Submitted by: John Wehle
Added:
head/sys/arm/amlogic/aml8726/aml8726_usb_phy-m3.c (contents, props changed)
Modified:
head/sys/arm/amlogic/aml8726/files.aml8726
Added: head/sys/arm/amlogic/aml8726/aml8726_usb_phy-m3.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/amlogic/aml8726/aml8726_usb_phy-m3.c Thu May 21 07:23:50 2015 (r283186)
@@ -0,0 +1,428 @@
+/*-
+ * Copyright 2014-2015 John Wehle <john at feith.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Amlogic aml8726-m3 USB physical layer driver.
+ *
+ * Both USB physical interfaces share the same configuration register.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+
+#include <sys/gpio.h>
+
+#include <machine/bus.h>
+#include <machine/cpu.h>
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#include "gpio_if.h"
+
+struct aml8726_usb_phy_gpio {
+ device_t dev;
+ uint32_t pin;
+ uint32_t pol;
+};
+
+struct aml8726_usb_phy_softc {
+ device_t dev;
+ struct resource *res[1];
+ uint32_t npwr_en;
+ struct aml8726_usb_phy_gpio *pwr_en;
+};
+
+static struct resource_spec aml8726_usb_phy_spec[] = {
+ { SYS_RES_MEMORY, 0, RF_ACTIVE },
+ { -1, 0 }
+};
+
+#define AML_USB_PHY_CFG_REG 0
+#define AML_USB_PHY_CFG_A_CLK_DETECTED (1U << 31)
+#define AML_USB_PHY_CFG_CLK_DIV_MASK (0x7f << 24)
+#define AML_USB_PHY_CFG_CLK_DIV_SHIFT 24
+#define AML_USB_PHY_CFG_B_CLK_DETECTED (1 << 22)
+#define AML_USB_PHY_CFG_A_PLL_RST (1 << 19)
+#define AML_USB_PHY_CFG_A_PHYS_RST (1 << 18)
+#define AML_USB_PHY_CFG_A_RST (1 << 17)
+#define AML_USB_PHY_CFG_B_PLL_RST (1 << 13)
+#define AML_USB_PHY_CFG_B_PHYS_RST (1 << 12)
+#define AML_USB_PHY_CFG_B_RST (1 << 11)
+#define AML_USB_PHY_CFG_CLK_EN (1 << 8)
+#define AML_USB_PHY_CFG_CLK_SEL_MASK (7 << 5)
+#define AML_USB_PHY_CFG_CLK_SEL_XTAL (0 << 5)
+#define AML_USB_PHY_CFG_CLK_SEL_XTAL_DIV2 (1 << 5)
+#define AML_USB_PHY_CFG_B_POR (1 << 1)
+#define AML_USB_PHY_CFG_A_POR (1 << 0)
+
+#define AML_USB_PHY_CFG_CLK_DETECTED \
+ (AML_USB_PHY_CFG_A_CLK_DETECTED | AML_USB_PHY_CFG_B_CLK_DETECTED)
+
+#define AML_USB_PHY_MISC_A_REG 12
+#define AML_USB_PHY_MISC_B_REG 16
+#define AML_USB_PHY_MISC_ID_OVERIDE_EN (1 << 23)
+#define AML_USB_PHY_MISC_ID_OVERIDE_DEVICE (1 << 22)
+#define AML_USB_PHY_MISC_ID_OVERIDE_HOST (0 << 22)
+
+#define CSR_WRITE_4(sc, reg, val) bus_write_4((sc)->res[0], reg, (val))
+#define CSR_READ_4(sc, reg) bus_read_4((sc)->res[0], reg)
+#define CSR_BARRIER(sc, reg) bus_barrier((sc)->res[0], reg, 4, \
+ (BUS_SPACE_BARRIER_READ | BUS_SPACE_BARRIER_WRITE))
+
+#define PIN_ON_FLAG(pol) ((pol) == 0 ? \
+ GPIO_PIN_LOW : GPIO_PIN_HIGH)
+#define PIN_OFF_FLAG(pol) ((pol) == 0 ? \
+ GPIO_PIN_HIGH : GPIO_PIN_LOW)
+
+static int
+aml8726_usb_phy_mode(const char *dwcotg_path, uint32_t *mode)
+{
+ char *usb_mode;
+ phandle_t node;
+ ssize_t len;
+
+ if ((node = OF_finddevice(dwcotg_path)) == 0)
+ return (ENXIO);
+
+ if (fdt_is_compatible_strict(node, "synopsys,designware-hs-otg2") == 0)
+ return (ENXIO);
+
+ *mode = 0;
+
+ len = OF_getprop_alloc(node, "dr_mode",
+ sizeof(char), (void **)&usb_mode);
+
+ if (len <= 0)
+ return (0);
+
+ if (strcasecmp(usb_mode, "host") == 0) {
+ *mode = AML_USB_PHY_MISC_ID_OVERIDE_EN |
+ AML_USB_PHY_MISC_ID_OVERIDE_HOST;
+ } else if (strcasecmp(usb_mode, "peripheral") == 0) {
+ *mode = AML_USB_PHY_MISC_ID_OVERIDE_EN |
+ AML_USB_PHY_MISC_ID_OVERIDE_DEVICE;
+ }
+
+ free(usb_mode, M_OFWPROP);
+
+ return (0);
+}
+
+static int
+aml8726_usb_phy_probe(device_t dev)
+{
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (!ofw_bus_is_compatible(dev, "amlogic,aml8726-m3-usb-phy"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Amlogic aml8726-m3 USB PHY");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+aml8726_usb_phy_attach(device_t dev)
+{
+ struct aml8726_usb_phy_softc *sc = device_get_softc(dev);
+ int err;
+ int npwr_en;
+ pcell_t *prop;
+ phandle_t node;
+ ssize_t len;
+ uint32_t div;
+ uint32_t i;
+ uint32_t mode_a;
+ uint32_t mode_b;
+ uint32_t value;
+
+ sc->dev = dev;
+
+ if (aml8726_usb_phy_mode("/soc/usb at c9040000", &mode_a) != 0) {
+ device_printf(dev, "missing usb at c9040000 node in FDT\n");
+ return (ENXIO);
+ }
+
+ if (aml8726_usb_phy_mode("/soc/usb at c90c0000", &mode_b) != 0) {
+ device_printf(dev, "missing usb at c90c0000 node in FDT\n");
+ return (ENXIO);
+ }
+
+ if (bus_alloc_resources(dev, aml8726_usb_phy_spec, sc->res)) {
+ device_printf(dev, "can not allocate resources for device\n");
+ return (ENXIO);
+ }
+
+ node = ofw_bus_get_node(dev);
+
+ err = 0;
+
+ len = OF_getencprop_alloc(node, "usb-pwr-en",
+ 3 * sizeof(pcell_t), (void **)&prop);
+ npwr_en = (len > 0) ? len : 0;
+
+ sc->npwr_en = 0;
+ sc->pwr_en = (struct aml8726_usb_phy_gpio *)
+ malloc(npwr_en * sizeof (*sc->pwr_en), M_DEVBUF, M_WAITOK);
+
+ for (i = 0; i < npwr_en; i++) {
+ sc->pwr_en[i].dev = OF_device_from_xref(prop[i * 3]);
+ sc->pwr_en[i].pin = prop[i * 3 + 1];
+ sc->pwr_en[i].pol = prop[i * 3 + 2];
+
+ if (sc->pwr_en[i].dev == NULL) {
+ err = 1;
+ break;
+ }
+ }
+
+ free(prop, M_OFWPROP);
+
+ if (err) {
+ device_printf(dev, "unable to parse gpio\n");
+ goto fail;
+ }
+
+ /* Turn on power by setting pin and then enabling output driver. */
+ for (i = 0; i < npwr_en; i++) {
+ if (GPIO_PIN_SET(sc->pwr_en[i].dev, sc->pwr_en[i].pin,
+ PIN_ON_FLAG(sc->pwr_en[i].pol)) != 0 ||
+ GPIO_PIN_SETFLAGS(sc->pwr_en[i].dev, sc->pwr_en[i].pin,
+ GPIO_PIN_OUTPUT) != 0) {
+ device_printf(dev,
+ "could not use gpio to control power\n");
+ goto fail;
+ }
+
+ sc->npwr_en++;
+ }
+
+ /*
+ * Configure the clock source and divider.
+ */
+
+ div = 2;
+
+ value = CSR_READ_4(sc, AML_USB_PHY_CFG_REG);
+
+ value &= ~(AML_USB_PHY_CFG_CLK_DIV_MASK | AML_USB_PHY_CFG_CLK_SEL_MASK);
+
+ value &= ~(AML_USB_PHY_CFG_A_RST | AML_USB_PHY_CFG_B_RST);
+ value &= ~(AML_USB_PHY_CFG_A_PLL_RST | AML_USB_PHY_CFG_B_PLL_RST);
+ value &= ~(AML_USB_PHY_CFG_A_PHYS_RST | AML_USB_PHY_CFG_B_PHYS_RST);
+ value &= ~(AML_USB_PHY_CFG_A_POR | AML_USB_PHY_CFG_B_POR);
+
+ value |= AML_USB_PHY_CFG_CLK_SEL_XTAL;
+ value |= ((div - 1) << AML_USB_PHY_CFG_CLK_DIV_SHIFT) &
+ AML_USB_PHY_CFG_CLK_DIV_MASK;
+ value |= AML_USB_PHY_CFG_CLK_EN;
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ /*
+ * Issue the reset sequence.
+ */
+
+ value |= (AML_USB_PHY_CFG_A_RST | AML_USB_PHY_CFG_B_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value &= ~(AML_USB_PHY_CFG_A_RST | AML_USB_PHY_CFG_B_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value |= (AML_USB_PHY_CFG_A_PLL_RST | AML_USB_PHY_CFG_B_PLL_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value &= ~(AML_USB_PHY_CFG_A_PLL_RST | AML_USB_PHY_CFG_B_PLL_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value |= (AML_USB_PHY_CFG_A_PHYS_RST | AML_USB_PHY_CFG_B_PHYS_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value &= ~(AML_USB_PHY_CFG_A_PHYS_RST | AML_USB_PHY_CFG_B_PHYS_RST);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ value |= (AML_USB_PHY_CFG_A_POR | AML_USB_PHY_CFG_B_POR);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ /*
+ * Enable by clearing the power on reset.
+ */
+
+ value &= ~(AML_USB_PHY_CFG_A_POR | AML_USB_PHY_CFG_B_POR);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ DELAY(200);
+
+ /*
+ * Check if the clock was detected.
+ */
+ value = CSR_READ_4(sc, AML_USB_PHY_CFG_REG);
+ if ((value & AML_USB_PHY_CFG_CLK_DETECTED) !=
+ AML_USB_PHY_CFG_CLK_DETECTED)
+ device_printf(dev, "PHY Clock not detected\n");
+
+ /*
+ * Configure the mode for each port.
+ */
+
+ value = CSR_READ_4(sc, AML_USB_PHY_MISC_A_REG);
+
+ value &= ~(AML_USB_PHY_MISC_ID_OVERIDE_EN |
+ AML_USB_PHY_MISC_ID_OVERIDE_DEVICE |
+ AML_USB_PHY_MISC_ID_OVERIDE_HOST);
+ value |= mode_a;
+
+ CSR_WRITE_4(sc, AML_USB_PHY_MISC_A_REG, value);
+
+ value = CSR_READ_4(sc, AML_USB_PHY_MISC_B_REG);
+
+ value &= ~(AML_USB_PHY_MISC_ID_OVERIDE_EN |
+ AML_USB_PHY_MISC_ID_OVERIDE_DEVICE |
+ AML_USB_PHY_MISC_ID_OVERIDE_HOST);
+ value |= mode_b;
+
+ CSR_WRITE_4(sc, AML_USB_PHY_MISC_B_REG, value);
+
+ CSR_BARRIER(sc, AML_USB_PHY_MISC_B_REG);
+
+ return (0);
+
+fail:
+ /* In the event of problems attempt to turn things back off. */
+ i = sc->npwr_en;
+ while (i-- != 0) {
+ GPIO_PIN_SET(sc->pwr_en[i].dev, sc->pwr_en[i].pin,
+ PIN_OFF_FLAG(sc->pwr_en[i].pol));
+ }
+
+ free (sc->pwr_en, M_DEVBUF);
+ sc->pwr_en = NULL;
+
+ bus_release_resources(dev, aml8726_usb_phy_spec, sc->res);
+
+ return (ENXIO);
+}
+
+static int
+aml8726_usb_phy_detach(device_t dev)
+{
+ struct aml8726_usb_phy_softc *sc = device_get_softc(dev);
+ uint32_t i;
+ uint32_t value;
+
+ /*
+ * Disable by issuing a power on reset.
+ */
+
+ value = CSR_READ_4(sc, AML_USB_PHY_CFG_REG);
+
+ value |= (AML_USB_PHY_CFG_A_POR | AML_USB_PHY_CFG_B_POR);
+
+ CSR_WRITE_4(sc, AML_USB_PHY_CFG_REG, value);
+
+ CSR_BARRIER(sc, AML_USB_PHY_CFG_REG);
+
+ /* Turn off power */
+ i = sc->npwr_en;
+ while (i-- != 0) {
+ (void)GPIO_PIN_SET(sc->pwr_en[i].dev, sc->pwr_en[i].pin,
+ PIN_OFF_FLAG(sc->pwr_en[i].pol));
+ }
+ free (sc->pwr_en, M_DEVBUF);
+ sc->pwr_en = NULL;
+
+ bus_release_resources(dev, aml8726_usb_phy_spec, sc->res);
+
+ return (0);
+}
+
+static device_method_t aml8726_usb_phy_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, aml8726_usb_phy_probe),
+ DEVMETHOD(device_attach, aml8726_usb_phy_attach),
+ DEVMETHOD(device_detach, aml8726_usb_phy_detach),
+
+ DEVMETHOD_END
+};
+
+static driver_t aml8726_usb_phy_driver = {
+ "usbphy",
+ aml8726_usb_phy_methods,
+ sizeof(struct aml8726_usb_phy_softc),
+};
+
+static devclass_t aml8726_usb_phy_devclass;
+
+DRIVER_MODULE(aml8726_m3usbphy, simplebus, aml8726_usb_phy_driver,
+ aml8726_usb_phy_devclass, 0, 0);
+MODULE_DEPEND(aml8726_m3usbphy, aml8726_gpio, 1, 1, 1);
Modified: head/sys/arm/amlogic/aml8726/files.aml8726
==============================================================================
--- head/sys/arm/amlogic/aml8726/files.aml8726 Thu May 21 07:10:49 2015 (r283185)
+++ head/sys/arm/amlogic/aml8726/files.aml8726 Thu May 21 07:23:50 2015 (r283186)
@@ -30,6 +30,7 @@ arm/amlogic/aml8726/aml8726_sdxc-m8.c o
arm/amlogic/aml8726/aml8726_pinctrl.c optional fdt_pinctrl
#arm/amlogic/aml8726/aml8726_rng.c optional random
arm/amlogic/aml8726/uart_dev_aml8726.c optional uart
+arm/amlogic/aml8726/aml8726_usb_phy-m3.c optional dwcotg usb gpio
arm/amlogic/aml8726/aml8726_usb_phy-m6.c optional dwcotg usb gpio
dev/dwc/if_dwc.c optional dwc
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