[src/trunk]: src/sys/arch/evbarm/exynos EXYNOS rewrite step 3 of N: Add alias...

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

details:   https://anonhg.NetBSD.org/src/rev/757b7bd6673c
branches:  trunk
changeset: 342179:757b7bd6673c
user:      marty <marty%NetBSD.org@localhost>
date:      Fri Dec 11 04:12:21 2015 +0000

description:
EXYNOS rewrite step 3 of N: Add aliases for gpio pins

This adds the GPIO aliases that will be used for board-independent driver
lookup until we have FDT.

The idea here is that each pin used by any driver is given a name that
the driver knows that is independent of the gpio bank name.  The mapping
from the alias to the actual gpio bank + pin number is done in this file
and a lookup function is added to exynos_gpio.c that allows a driver to
ask for a gpio pin by the alias name, blisssfully unaware that there is
an underlying GPIO bank name.

Once set up with all the drivers, it should then be possible to move to a
different vendor's board simply by modifying exynos_machdep.c

diffstat:

 sys/arch/evbarm/exynos/exynos_machdep.c |  70 ++++++++++++++++++++++++++++++--
 1 files changed, 65 insertions(+), 5 deletions(-)

diffs (119 lines):

diff -r 45c1f39bf207 -r 757b7bd6673c sys/arch/evbarm/exynos/exynos_machdep.c
--- a/sys/arch/evbarm/exynos/exynos_machdep.c   Fri Dec 11 04:11:23 2015 +0000
+++ b/sys/arch/evbarm/exynos/exynos_machdep.c   Fri Dec 11 04:12:21 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: exynos_machdep.c,v 1.1 2015/12/06 00:33:44 marty Exp $ */
+/*     $NetBSD: exynos_machdep.c,v 1.2 2015/12/11 04:12:21 marty Exp $ */
 
 /*
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: exynos_machdep.c,v 1.1 2015/12/06 00:33:44 marty Exp $");
+__KERNEL_RCSID(0, "$NetBSD: exynos_machdep.c,v 1.2 2015/12/11 04:12:21 marty Exp $");
 
 #include "opt_evbarm_boardtype.h"
 #include "opt_exynos.h"
@@ -135,6 +135,9 @@
 uint8_t uboot_enaddr[ETHER_ADDR_LEN] = {};
 
 
+void
+odroid_device_register(device_t self, void *aux);
+
 /*
  * kernel start and end from the linker
  */
@@ -201,6 +204,40 @@
 };
 #endif
 
+static struct gpio_pin_entry {
+       const char *pin_name;
+       const char *pin_user;
+} gpio_pin_entries[] = {
+       /* mux@13400000 (muxa) */
+       { "gpx3-7", "hdmi-hpd-irq"},
+       { "gpx3-6", "hdmi_cec" },
+       { "gpx0-7", "dp_hpd_gpio" },
+       { "gpx0-4", "pmic-irq" },
+       { "gpx3-2", "audio-irq" },
+       { "gpx3-4", "b-sess1-irq" },
+       { "gpx3-5", "b-sess0-irq" },
+       { "gpx1-1", "id2-irq" },
+       /* mux@134100000 (muxb) */
+       { "gpc0-0", "sd0-clk" },
+       { "gpc0-1", "sd0-cmd" },
+       { "gpc0-7", "sd0-rdqs" },
+       { "gpd1-3", "sd0-qrdy" },
+       { "gpc0-3", "sd0-bus-width1" },
+       { "gpc0-3", "sd0-bus-width4-bit1" },
+       { "gpc0-4", "sd0-bus-width4-bit2" },
+       { "gpc0-5", "sd0-bus-width4-bit3" },
+       { "gpc0-6", "sd0-bus-width4-bit4" },
+       { "gpc1-0", "sd1-clk" },
+       { "gpc1-1", "sd1-cmd" },
+       { "gpc1-3", "sd1-bus-width1" },
+       { "gpc1-3", "sd1-bus-width4-bit1" },
+       { "gpc1-4", "sd1-bus-width4-bit2" },
+       { "gpc1-5", "sd1-bus-width4-bit3" },
+       { "gpc1-6", "sd1-bus-width4-bit4" },
+       /* TODO: muxc and muxd as needed */
+       { 0, 0}
+};
+       
 #ifdef VERBOSE_INIT_ARM
 extern void exynos_putchar(int);
 
@@ -238,6 +275,20 @@
 extern void cortex_mpstart(void);
 
 /*
+ * void init_gpio_dictionary(...)
+ *
+ * Setup the dictionary of gpio pin names for the drivers to use
+ */
+static void init_gpio_dictionary(struct gpio_pin_entry *pins,
+                                prop_dictionary_t dict)
+{
+       while (pins->pin_name) {
+               prop_dictionary_set_cstring(dict, pins->pin_user,
+                                           pins->pin_name);
+               pins++;
+       }
+}
+/*
  * u_int initarm(...)
  *
  * Our entry point from the assembly before main() is called.
@@ -351,9 +402,8 @@
            mapallmem_p);
 
        /* we've a specific device_register routine */
-       evbarm_device_register = exynos_device_register;
-       evbarm_device_register_post_config = exynos_device_register_post_config;
-
+       evbarm_device_register = odroid_device_register;
+//     evbarm_device_register_post_config = exynos_device_register_post_config;
        /*
         * If we couldn't map all of memory via TTBR1, limit the memory the
         * kernel can allocate from to be from the highest available 1GB.
@@ -458,6 +508,16 @@
 #undef EXPECT_COLON
 }
 
+void
+odroid_device_register(device_t self, void *aux)
+{
+       prop_dictionary_t dict = device_properties(self);
+       exynos_device_register(self, aux);
+       if (device_is_a(self, "exyogpio")) {
+               init_gpio_dictionary(gpio_pin_entries, dict);
+       }
+}
+
 /*
  * Exynos specific tweaks
  */