Module Name: src
Committed By: jmcneill
Date: Fri Sep 22 18:12:31 UTC 2017
Modified Files:
src/sys/dev/i2c: files.i2c
Added Files:
src/sys/dev/i2c: max77620.c tcagpio.c
Log Message:
Add GPIO drivers for MAX77620 and TCA9539 as found in Jetson TX1
To generate a diff of this commit:
cvs rdiff -u -r1.75 -r1.76 src/sys/dev/i2c/files.i2c
cvs rdiff -u -r0 -r1.1 src/sys/dev/i2c/max77620.c src/sys/dev/i2c/tcagpio.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/i2c/files.i2c
diff -u src/sys/dev/i2c/files.i2c:1.75 src/sys/dev/i2c/files.i2c:1.76
--- src/sys/dev/i2c/files.i2c:1.75 Thu Aug 31 19:55:43 2017
+++ src/sys/dev/i2c/files.i2c Fri Sep 22 18:12:31 2017
@@ -1,4 +1,4 @@
-# $NetBSD: files.i2c,v 1.75 2017/08/31 19:55:43 jmcneill Exp $
+# $NetBSD: files.i2c,v 1.76 2017/09/22 18:12:31 jmcneill Exp $
obsolete defflag opt_i2cbus.h I2C_SCAN
define i2cbus { }
@@ -267,3 +267,13 @@ file dev/i2c/as3722.c as3722pmic needs
device tcakp: wskbddev, linux_keymap
attach tcakp at iic
file dev/i2c/tcakp.c tcakp
+
+# MAXIM MAX77620 Power Management IC
+device max77620pmic
+attach max77620pmic at iic
+file dev/i2c/max77620.c max77620pmic
+
+# Texas Instruments TCA9539 I/O Expander
+device tcagpio
+attach tcagpio at iic
+file dev/i2c/tcagpio.c tcagpio
Added files:
Index: src/sys/dev/i2c/max77620.c
diff -u /dev/null src/sys/dev/i2c/max77620.c:1.1
--- /dev/null Fri Sep 22 18:12:31 2017
+++ src/sys/dev/i2c/max77620.c Fri Sep 22 18:12:31 2017
@@ -0,0 +1,286 @@
+/* $NetBSD: max77620.c,v 1.1 2017/09/22 18:12:31 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <[email protected]>
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: max77620.c,v 1.1 2017/09/22 18:12:31 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+#include <sys/gpio.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#define MAX_GPIO_REG(n) (0x36 + (n))
+#define MAX_GPIO_DEBOUNCE __BITS(7,6)
+#define MAX_GPIO_INT __BITS(5,4)
+#define MAX_GPIO_OUTPUT_VAL __BIT(3)
+#define MAX_GPIO_INPUT_VAL __BIT(2)
+#define MAX_GPIO_DIR __BIT(1)
+#define MAX_GPIO_DRV __BIT(0)
+
+#define MAX_GPIO_COUNT 8
+
+struct max77620_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+ int sc_phandle;
+};
+
+struct max77620_pin {
+ struct max77620_softc *pin_sc;
+ int pin_num;
+ int pin_flags;
+ bool pin_actlo;
+};
+
+static const char * max77620_compats[] = {
+ "maxim,max77620",
+ NULL
+};
+
+static uint8_t
+max77620_read(struct max77620_softc *sc, uint8_t reg, int flags)
+{
+ uint8_t val = 0;
+ int error;
+
+ error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr,
+ ®, 1, &val, 1, flags);
+ if (error != 0)
+ aprint_error_dev(sc->sc_dev, "error reading reg %#x: %d\n", reg, error);
+
+ return val;
+}
+
+static void
+max77620_write(struct max77620_softc *sc, uint8_t reg, uint8_t val, int flags)
+{
+ int error;
+
+ error = iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
+ ®, 1, &val, 1, flags);
+ if (error != 0)
+ aprint_error_dev(sc->sc_dev, "error writing reg %#x: %d\n", reg, error);
+}
+
+#define I2C_READ(sc, reg) max77620_read((sc), (reg), I2C_F_POLL)
+#define I2C_WRITE(sc, reg, val) max77620_write((sc), (reg) << 1, (val), I2C_F_POLL)
+#define I2C_LOCK(sc) iic_acquire_bus((sc)->sc_i2c, I2C_F_POLL)
+#define I2C_UNLOCK(sc) iic_release_bus((sc)->sc_i2c, I2C_F_POLL)
+
+static int
+max77620_gpio_config(struct max77620_softc *sc, int pin, int flags)
+{
+ uint32_t gpio;
+
+ KASSERT(pin >= 0 && pin < MAX_GPIO_COUNT);
+
+ gpio = I2C_READ(sc, MAX_GPIO_REG(pin));
+
+ switch (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
+ case GPIO_PIN_INPUT:
+ gpio |= MAX_GPIO_DIR;
+ break;
+ case GPIO_PIN_OUTPUT:
+ gpio &= ~MAX_GPIO_DIR;
+ break;
+ default:
+ return EINVAL;
+ }
+
+ switch (flags & (GPIO_PIN_PUSHPULL|GPIO_PIN_OPENDRAIN)) {
+ case GPIO_PIN_PUSHPULL:
+ gpio |= MAX_GPIO_DRV;
+ break;
+ case GPIO_PIN_OPENDRAIN:
+ gpio &= ~MAX_GPIO_DRV;
+ break;
+ default:
+ return EINVAL;
+ }
+
+ I2C_WRITE(sc, MAX_GPIO_REG(pin), gpio);
+
+ return 0;
+}
+
+static void *
+max77620_gpio_acquire(device_t dev, const void *data, size_t len, int flags)
+{
+ struct max77620_softc * const sc = device_private(dev);
+ struct max77620_pin *gpin;
+ const u_int *gpio = data;
+ int error;
+
+ if (len != 12)
+ return NULL;
+
+ const uint8_t pin = be32toh(gpio[1]) & 0xff;
+ const bool actlo = (be32toh(gpio[2]) & __BIT(0)) != 0;
+ const bool pushpull = (be32toh(gpio[2]) & __BIT(1)) == 0;
+ const bool opendrain = (be32toh(gpio[2]) & __BIT(2)) != 0;
+
+ if (pushpull)
+ flags |= GPIO_PIN_PUSHPULL;
+ if (opendrain)
+ flags |= GPIO_PIN_OPENDRAIN;
+
+ if (pin >= MAX_GPIO_COUNT)
+ return NULL;
+
+ I2C_LOCK(sc);
+ error = max77620_gpio_config(sc, pin, flags);
+ I2C_UNLOCK(sc);
+
+ if (error != 0) {
+ device_printf(dev, "bad pin %d config %#x\n", pin, flags);
+ return NULL;
+ }
+
+ gpin = kmem_zalloc(sizeof(*gpin), KM_SLEEP);
+ gpin->pin_sc = sc;
+ gpin->pin_num = pin;
+ gpin->pin_flags = flags;
+ gpin->pin_actlo = actlo;
+
+ return gpin;
+}
+
+static void
+max77620_gpio_release(device_t dev, void *priv)
+{
+ struct max77620_softc * const sc = device_private(dev);
+ struct max77620_pin *gpin = priv;
+
+ I2C_LOCK(sc);
+ max77620_gpio_config(sc, gpin->pin_num, GPIO_PIN_INPUT|GPIO_PIN_OPENDRAIN);
+ I2C_UNLOCK(sc);
+
+ kmem_free(gpin, sizeof(*gpin));
+}
+
+static int
+max77620_gpio_read(device_t dev, void *priv, bool raw)
+{
+ struct max77620_softc * const sc = device_private(dev);
+ struct max77620_pin *gpin = priv;
+ uint8_t gpio;
+ int val;
+
+ I2C_LOCK(sc);
+ gpio = I2C_READ(sc, MAX_GPIO_REG(gpin->pin_num));
+ I2C_UNLOCK(sc);
+
+ val = __SHIFTOUT(gpio, MAX_GPIO_INPUT_VAL);
+ if (!raw && gpin->pin_actlo)
+ val = !val;
+
+#ifdef MAX77620_DEBUG
+ device_printf(sc->sc_dev, "GPIO%d rd %02x (%d %d)\n",
+ gpin->pin_num, gpio,
+ (int)__SHIFTOUT(gpio, MAX_GPIO_INPUT_VAL), val);
+#endif
+
+ return val;
+}
+
+static void
+max77620_gpio_write(device_t dev, void *priv, int val, bool raw)
+{
+ struct max77620_softc * const sc = device_private(dev);
+ struct max77620_pin *gpin = priv;
+ uint8_t gpio;
+
+ if (!raw && gpin->pin_actlo)
+ val = !val;
+
+ I2C_LOCK(sc);
+ gpio = I2C_READ(sc, MAX_GPIO_REG(gpin->pin_num));
+ gpio &= ~MAX_GPIO_OUTPUT_VAL;
+ gpio |= __SHIFTIN(val, MAX_GPIO_OUTPUT_VAL);
+#ifdef MAX77620_DEBUG
+ device_printf(sc->sc_dev, "GPIO%d wr %02x -> %02x\n",
+ gpin->pin_num,
+ I2C_READ(sc, MAX_GPIO_REG(gpin->pin_num)), gpio);
+#endif
+ I2C_WRITE(sc, MAX_GPIO_REG(gpin->pin_num), gpio);
+ I2C_UNLOCK(sc);
+}
+
+static struct fdtbus_gpio_controller_func max77620_gpio_funcs = {
+ .acquire = max77620_gpio_acquire,
+ .release = max77620_gpio_release,
+ .read = max77620_gpio_read,
+ .write = max77620_gpio_write,
+};
+
+static void
+max77620_gpio_attach(struct max77620_softc *sc)
+{
+ fdtbus_register_gpio_controller(sc->sc_dev, sc->sc_phandle,
+ &max77620_gpio_funcs);
+}
+
+static int
+max77620_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct i2c_attach_args *ia = aux;
+
+ if (ia->ia_name == NULL)
+ return 0;
+
+ return iic_compat_match(ia, max77620_compats);
+}
+
+static void
+max77620_attach(device_t parent, device_t self, void *aux)
+{
+ struct max77620_softc * const sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+ sc->sc_phandle = ia->ia_cookie;
+
+ aprint_naive("\n");
+ aprint_normal(": MAX77620 Power Management IC\n");
+
+ max77620_gpio_attach(sc);
+}
+
+CFATTACH_DECL_NEW(max77620pmic, sizeof(struct max77620_softc),
+ max77620_match, max77620_attach, NULL, NULL);
Index: src/sys/dev/i2c/tcagpio.c
diff -u /dev/null src/sys/dev/i2c/tcagpio.c:1.1
--- /dev/null Fri Sep 22 18:12:31 2017
+++ src/sys/dev/i2c/tcagpio.c Fri Sep 22 18:12:31 2017
@@ -0,0 +1,275 @@
+/* $NetBSD: tcagpio.c,v 1.1 2017/09/22 18:12:31 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <[email protected]>
+ * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: tcagpio.c,v 1.1 2017/09/22 18:12:31 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/bus.h>
+#include <sys/kmem.h>
+#include <sys/gpio.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#define PORT_BANK(pin) (pin / 8)
+#define PORT_BIT(pin) __BIT(pin % 8)
+
+#define PORT_IN(pin) (0x00 + PORT_BANK(pin))
+#define PORT_OUT(pin) (0x02 + PORT_BANK(pin))
+#define PORT_POLARITY(pin) (0x04 + PORT_BANK(pin))
+#define PORT_CFG(pin) (0x06 + PORT_BANK(pin))
+
+#define TCA_PIN_COUNT 16
+
+struct tcagpio_softc {
+ device_t sc_dev;
+ i2c_tag_t sc_i2c;
+ i2c_addr_t sc_addr;
+ int sc_phandle;
+
+ int sc_npins;
+};
+
+struct tcagpio_pin {
+ struct tcagpio_softc *pin_sc;
+ int pin_num;
+ int pin_flags;
+ bool pin_actlo;
+};
+
+static const char * compatible[] = {
+ "ti,tca9539",
+ NULL
+};
+
+static uint8_t
+tcagpio_read(struct tcagpio_softc *sc, uint8_t reg, int flags)
+{
+ uint8_t val = 0;
+ int error;
+
+ error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, sc->sc_addr,
+ ®, 1, &val, 1, flags);
+ if (error != 0)
+ aprint_error_dev(sc->sc_dev, "error reading reg %#x: %d\n", reg, error);
+
+ return val;
+}
+
+static void
+tcagpio_write(struct tcagpio_softc *sc, uint8_t reg, uint8_t val, int flags)
+{
+ uint8_t buf[2];
+ int error;
+
+ buf[0] = reg;
+ buf[1] = val;
+
+ error = iic_exec(sc->sc_i2c, I2C_OP_WRITE_WITH_STOP, sc->sc_addr,
+ NULL, 0, buf, 2, flags);
+ if (error != 0)
+ aprint_error_dev(sc->sc_dev, "error writing reg %#x: %d\n", reg, error);
+}
+
+#define I2C_READ(sc, reg) tcagpio_read((sc), (reg), I2C_F_POLL)
+#define I2C_WRITE(sc, reg, val) tcagpio_write((sc), (reg), (val), I2C_F_POLL)
+#define I2C_LOCK(sc) iic_acquire_bus((sc)->sc_i2c, I2C_F_POLL)
+#define I2C_UNLOCK(sc) iic_release_bus((sc)->sc_i2c, I2C_F_POLL)
+
+static int
+tcagpio_gpio_config(struct tcagpio_softc *sc, int pin, int flags)
+{
+ uint16_t gpio;
+
+ KASSERT(pin >= 0 && pin < sc->sc_npins);
+
+ gpio = I2C_READ(sc, PORT_CFG(pin));
+
+ switch (flags & (GPIO_PIN_INPUT|GPIO_PIN_OUTPUT)) {
+ case GPIO_PIN_INPUT:
+ gpio |= PORT_BIT(pin);
+ break;
+ case GPIO_PIN_OUTPUT:
+ gpio &= ~PORT_BIT(pin);
+ break;
+ default:
+ return EINVAL;
+ }
+
+ I2C_WRITE(sc, PORT_CFG(pin), gpio);
+
+ return 0;
+}
+
+static void *
+tcagpio_gpio_acquire(device_t dev, const void *data, size_t len, int flags)
+{
+ struct tcagpio_softc * const sc = device_private(dev);
+ struct tcagpio_pin *gpin;
+ const u_int *gpio = data;
+ int error;
+
+ if (len != 12)
+ return NULL;
+
+ const uint8_t pin = be32toh(gpio[1]) & 0xff;
+ const bool actlo = (be32toh(gpio[2]) & __BIT(0)) != 0;
+
+ if (pin >= sc->sc_npins)
+ return NULL;
+
+ I2C_LOCK(sc);
+ error = tcagpio_gpio_config(sc, pin, flags);
+ I2C_UNLOCK(sc);
+
+ if (error != 0) {
+ device_printf(dev, "bad pin %d config %#x\n", pin, flags);
+ return NULL;
+ }
+
+ gpin = kmem_zalloc(sizeof(*gpin), KM_SLEEP);
+ gpin->pin_sc = sc;
+ gpin->pin_num = pin;
+ gpin->pin_flags = flags;
+ gpin->pin_actlo = actlo;
+
+ return gpin;
+}
+
+static void
+tcagpio_gpio_release(device_t dev, void *priv)
+{
+ struct tcagpio_softc * const sc = device_private(dev);
+ struct tcagpio_pin *gpin = priv;
+
+ I2C_LOCK(sc);
+ tcagpio_gpio_config(sc, gpin->pin_num, GPIO_PIN_INPUT);
+ I2C_UNLOCK(sc);
+
+ kmem_free(gpin, sizeof(*gpin));
+}
+
+static int
+tcagpio_gpio_read(device_t dev, void *priv, bool raw)
+{
+ struct tcagpio_softc * const sc = device_private(dev);
+ struct tcagpio_pin *gpin = priv;
+ uint8_t gpio;
+ int val;
+
+ I2C_LOCK(sc);
+ gpio = I2C_READ(sc, PORT_IN(gpin->pin_num));
+ I2C_UNLOCK(sc);
+
+ val = __SHIFTOUT(gpio, PORT_BIT(gpin->pin_num));
+ if (!raw && gpin->pin_actlo)
+ val = !val;
+
+#ifdef TCAGPIO_DEBUG
+ device_printf(sc->sc_dev, "GPIO%d rd %02x (%d %d)\n",
+ gpin->pin_num, gpio,
+ (int)__SHIFTOUT(gpio, PORT_BIT(gpin->pin_num)), val);
+#endif
+
+ return val;
+}
+
+static void
+tcagpio_gpio_write(device_t dev, void *priv, int val, bool raw)
+{
+ struct tcagpio_softc * const sc = device_private(dev);
+ struct tcagpio_pin *gpin = priv;
+ uint8_t gpio;
+
+ if (!raw && gpin->pin_actlo)
+ val = !val;
+
+ I2C_LOCK(sc);
+ gpio = I2C_READ(sc, PORT_OUT(gpin->pin_num));
+ gpio &= ~PORT_BIT(gpin->pin_num);
+ gpio |= __SHIFTIN(val, PORT_BIT(gpin->pin_num));
+#ifdef TCAGPIO_DEBUG
+ device_printf(sc->sc_dev, "GPIO%d wr %02x -> %02x\n",
+ gpin->pin_num,
+ I2C_READ(sc, PORT_OUT(gpin->pin_num)), gpio);
+#endif
+ I2C_WRITE(sc, PORT_OUT(gpin->pin_num), gpio);
+ I2C_UNLOCK(sc);
+}
+
+static struct fdtbus_gpio_controller_func tcagpio_gpio_funcs = {
+ .acquire = tcagpio_gpio_acquire,
+ .release = tcagpio_gpio_release,
+ .read = tcagpio_gpio_read,
+ .write = tcagpio_gpio_write,
+};
+
+static void
+tcagpio_gpio_attach(struct tcagpio_softc *sc)
+{
+ fdtbus_register_gpio_controller(sc->sc_dev, sc->sc_phandle,
+ &tcagpio_gpio_funcs);
+}
+
+static int
+tcagpio_match(device_t parent, cfdata_t match, void *aux)
+{
+ struct i2c_attach_args *ia = aux;
+
+ if (ia->ia_name == NULL)
+ return 0;
+
+ return iic_compat_match(ia, compatible);
+}
+
+static void
+tcagpio_attach(device_t parent, device_t self, void *aux)
+{
+ struct tcagpio_softc * const sc = device_private(self);
+ struct i2c_attach_args *ia = aux;
+
+ sc->sc_dev = self;
+ sc->sc_i2c = ia->ia_tag;
+ sc->sc_addr = ia->ia_addr;
+ sc->sc_phandle = ia->ia_cookie;
+ sc->sc_npins = TCA_PIN_COUNT;
+
+ aprint_naive("\n");
+ aprint_normal(": I2C/SMBus I/O Expander\n");
+
+ tcagpio_gpio_attach(sc);
+}
+
+CFATTACH_DECL_NEW(tcagpio, sizeof(struct tcagpio_softc),
+ tcagpio_match, tcagpio_attach, NULL, NULL);
