[src/trunk]: src/sys/arch/arm/broadcom Support configuration of alternate fun...

[mlelstv <mlelstv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/38c24642da76
branches:  trunk
changeset: 996745:38c24642da76
user:      mlelstv <mlelstv%NetBSD.org@localhost>
date:      Thu Feb 07 21:16:35 2019 +0000

description:
Support configuration of alternate functions.

diffstat:

 sys/arch/arm/broadcom/bcm2835_gpio.c |  49 ++++++++++++++++++++++++++++++-----
 1 files changed, 42 insertions(+), 7 deletions(-)

diffs (104 lines):

diff -r d1c97bfd54fa -r 38c24642da76 sys/arch/arm/broadcom/bcm2835_gpio.c
--- a/sys/arch/arm/broadcom/bcm2835_gpio.c      Thu Feb 07 20:56:27 2019 +0000
+++ b/sys/arch/arm/broadcom/bcm2835_gpio.c      Thu Feb 07 21:16:35 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: bcm2835_gpio.c,v 1.9 2019/01/26 14:38:29 thorpej Exp $ */
+/*     $NetBSD: bcm2835_gpio.c,v 1.10 2019/02/07 21:16:35 mlelstv Exp $        */
 
 /*-
  * Copyright (c) 2013, 2014, 2017 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: bcm2835_gpio.c,v 1.9 2019/01/26 14:38:29 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: bcm2835_gpio.c,v 1.10 2019/02/07 21:16:35 mlelstv Exp $");
 
 /*
  * Driver for BCM2835 GPIO
@@ -288,7 +288,10 @@
                        sc->sc_gpio_pins[pin].pin_caps = GPIO_PIN_INPUT |
                                GPIO_PIN_OUTPUT |
                                GPIO_PIN_PUSHPULL | GPIO_PIN_TRISTATE |
-                               GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN;
+                               GPIO_PIN_PULLUP | GPIO_PIN_PULLDOWN |
+                               GPIO_PIN_ALT0 | GPIO_PIN_ALT1 |
+                               GPIO_PIN_ALT2 | GPIO_PIN_ALT3 |
+                               GPIO_PIN_ALT4 | GPIO_PIN_ALT5;
                        sc->sc_gpio_pins[pin].pin_intrcaps =
                                GPIO_INTR_POS_EDGE |
                                GPIO_INTR_NEG_EDGE |
@@ -299,11 +302,11 @@
                        /* read initial state */
                        sc->sc_gpio_pins[pin].pin_state =
                                bcm2835gpio_gpio_pin_read(sc, pin);
-                       DPRINTF(1, ("%s: attach pin %d\n", device_xname(sc->sc_dev), pin));
+                       aprint_debug_dev(sc->sc_dev, "attach pin %d\n", pin);
                } else {
                        sc->sc_gpio_pins[pin].pin_caps = 0;
                        sc->sc_gpio_pins[pin].pin_state = 0;
-                       DPRINTF(1, ("%s: skip pin %d - func = 0x%x\n", device_xname(sc->sc_dev), pin, func));
+                       aprint_debug_dev(sc->sc_dev, "skip pin %d - func = %x\n", pin, func);
                }
        }
 
@@ -329,7 +332,7 @@
                            MIN((bank * 32) + 31, BCMGPIO_MAXPINS),
                            intrstr);
                } else {
-                       aprint_normal_dev(self,
+                       aprint_error_dev(self,
                            "failed to establish interrupt for pins %d..%d\n",
                            bank * 32,
                            MIN((bank * 32) + 31, BCMGPIO_MAXPINS));
@@ -787,17 +790,49 @@
 {
        struct bcmgpio_softc *sc = arg;
        uint32_t cmd;
+       uint32_t altmask = GPIO_PIN_ALT0 | GPIO_PIN_ALT1 |
+                          GPIO_PIN_ALT2 | GPIO_PIN_ALT3 |
+                          GPIO_PIN_ALT4 | GPIO_PIN_ALT5;
 
        DPRINTF(2, ("%s: gpio_ctl pin %d flags 0x%x\n", device_xname(sc->sc_dev), pin, flags));
 
        mutex_enter(&sc->sc_lock);
        if (flags & (GPIO_PIN_OUTPUT|GPIO_PIN_INPUT)) {
-               if ((flags & GPIO_PIN_INPUT) || !(flags & GPIO_PIN_OUTPUT)) {
+               if ((flags & GPIO_PIN_INPUT) != 0) {
                        /* for safety INPUT will overide output */
                        bcm283x_pin_setfunc(sc, pin, BCM2835_GPIO_IN);
                } else {
                        bcm283x_pin_setfunc(sc, pin, BCM2835_GPIO_OUT);
                }
+       } else if ((flags & altmask) != 0) {
+               u_int func;
+
+               switch (flags & altmask) {
+               case GPIO_PIN_ALT0:
+                       func = BCM2835_GPIO_ALT0;
+                       break;
+               case GPIO_PIN_ALT1:
+                       func = BCM2835_GPIO_ALT1;
+                       break;
+               case GPIO_PIN_ALT2:
+                       func = BCM2835_GPIO_ALT2;
+                       break;
+               case GPIO_PIN_ALT3:
+                       func = BCM2835_GPIO_ALT3;
+                       break;
+               case GPIO_PIN_ALT4:
+                       func = BCM2835_GPIO_ALT4;
+                       break;
+               case GPIO_PIN_ALT5:
+                       func = BCM2835_GPIO_ALT5;
+                       break;
+               default:
+                       /* ignored below */
+                       func = BCM2835_GPIO_IN;
+                       break;
+               }
+               if (func != BCM2835_GPIO_IN)
+                       bcm283x_pin_setfunc(sc, pin, func);
        }
 
        if (flags & (GPIO_PIN_PULLUP|GPIO_PIN_PULLDOWN)) {