[src/trunk]: src/sys/arch/evbarm/odroid Implement Lan9730 powerycle for Exyno...

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

details:   https://anonhg.NetBSD.org/src/rev/c93cfdd8b993
branches:  trunk
changeset: 329748:c93cfdd8b993
user:      reinoud <reinoud%NetBSD.org@localhost>
date:      Fri Jun 06 14:42:26 2014 +0000

description:
Implement Lan9730 powerycle for Exynos4 to make it attach; its not that
trivial though as it relies on talking iic to the pmu and enabling lan_power
pin.

Some pins for the Odroid-XU boards have been added too.

diffstat:

 sys/arch/evbarm/odroid/odroid_machdep.c |  109 ++++++++++++++++++++++++++++++-
 1 files changed, 105 insertions(+), 4 deletions(-)

diffs (163 lines):

diff -r 626147227744 -r c93cfdd8b993 sys/arch/evbarm/odroid/odroid_machdep.c
--- a/sys/arch/evbarm/odroid/odroid_machdep.c   Fri Jun 06 14:37:04 2014 +0000
+++ b/sys/arch/evbarm/odroid/odroid_machdep.c   Fri Jun 06 14:42:26 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: odroid_machdep.c,v 1.20 2014/05/21 12:24:11 reinoud Exp $ */
+/*     $NetBSD: odroid_machdep.c,v 1.21 2014/06/06 14:42:26 reinoud Exp $ */
 
 /*
  * Copyright (c) 2014 The NetBSD Foundation, Inc.
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: odroid_machdep.c,v 1.20 2014/05/21 12:24:11 reinoud Exp $");
+__KERNEL_RCSID(0, "$NetBSD: odroid_machdep.c,v 1.21 2014/06/06 14:42:26 reinoud Exp $");
 
 #include "opt_evbarm_boardtype.h"
 #include "opt_exynos.h"
@@ -202,6 +202,7 @@
 #ifdef KGDB
 static void kgdb_port_init(void);
 #endif
+static void exynos_usb_powercycle_lan9730(device_t self);
 void odroid_device_register(device_t self, void *aux);
 void odroid_device_register_post_config(device_t self, void *aux);
 
@@ -520,7 +521,8 @@
        prop_dictionary_set_uint32(dict, "nc-GPY5", 0xff - 0b00000000);
        prop_dictionary_set_uint32(dict, "nc-GPY6", 0xff - 0b00000000);
        prop_dictionary_set_uint32(dict, "nc-ETC0", 0x3f - 0b00000000);
-       prop_dictionary_set_uint32(dict, "nc-ETC6", 0x7f - 0b00000000);
+       /* standard Xuhost bits at pin 5,6 */
+       prop_dictionary_set_uint32(dict, "nc-ETC6", 0x7f - 0b01100000);
        prop_dictionary_set_uint32(dict, "nc-GPM0", 0xff - 0b00000000);
        prop_dictionary_set_uint32(dict, "nc-GPM1", 0x7f - 0b00000000);
        prop_dictionary_set_uint32(dict, "nc-GPM2", 0x1f - 0b00000000);
@@ -611,6 +613,12 @@
                odroid_exynos5_gpio_ncs(self, dict);
 
                /* explicit pin settings */
+               prop_dictionary_set_cstring(dict, "hub_nreset", ">GPX1[4]");
+               prop_dictionary_set_cstring(dict, "hub_connect", ">GPX0[6]");
+               prop_dictionary_set_cstring(dict, "hub_nint", "<GPX0[7]");
+
+               /* internal hub IIRC, unknown if this line exists */
+               //prop_dictionary_set_cstring(dict, "p3v3_en", ">GPA1[3]");
        }
 #endif
 }
@@ -669,12 +677,104 @@
 
                /* DONE! */
        } else {
-               aprint_error_dev(self, "failed to lookup GPIO pins");
+               aprint_error_dev(self,
+                       "failed to lookup GPIO pins for usb3503 hub init");
        }
        /* XXX leaving pins claimed! */
 }
 
 
+#if 0
+static void
+exynos_max77686_dump(struct i2c_controller *i2c)
+{
+       int error;
+
+       printf("%s:\n", __func__);
+       for (int i = 0; i < 0x80; i++) {
+               error = iic_exec(i2c, I2C_OP_READ_WITH_STOP, 0x09, &i, 1,
+                               &rdata, sizeof(rdata), 0);
+               KASSERT(!error);
+               if (i % 16 == 0)
+                       printf("\n%02x: ", i);
+               printf("%02x ", rdata);
+       }
+       printf("\n");
+}
+#endif
+
+
+static void
+exynos_usb_powercycle_lan9730(device_t self)
+{
+#ifdef EXYNOS4
+       prop_dictionary_t dict = device_properties(self);
+       struct exynos_gpio_pindata enable_pin;
+       struct i2c_controller *i2c;
+       const char *pin_enable;
+       uint8_t rdata, wdata, reg;
+       int error;
+       bool ok;
+
+       /*
+        * XXX fixed for now:
+        *    Odroid-U2/U3 : Max77686 chip is attached to iic0 chipid 0x09
+        */
+       const int iicbus      = 0;
+       const int chipid      = 0x09;
+       const int buck_outreg = 0x37;   /* buck 8 output voltage */
+       const int buck_ctlreg = 0x38;   /* buck 8 power control */
+
+       i2c = exynos_i2cbus[iicbus];
+       KASSERT(i2c);
+       iic_acquire_bus(i2c, 0);
+
+       /* set power level to 0v */
+       reg = buck_outreg;
+       wdata = 0x0;
+       error = iic_exec(i2c, I2C_OP_WRITE_WITH_STOP, chipid, &reg, 1,
+                       &wdata, sizeof(wdata), 0);
+       KASSERT(!error);
+       DELAY(10000);
+
+       /* set power level back to 3.3v */
+       wdata = 0x33;
+       error = iic_exec(i2c, I2C_OP_WRITE_WITH_STOP, chipid, &reg, 1,
+                       &wdata, sizeof(wdata), 0);
+       KASSERT(!error);
+       DELAY(10000);
+
+       /* enable the bucket explicitly */
+       reg = buck_ctlreg;
+        error = iic_exec(i2c, I2C_OP_READ_WITH_STOP, chipid, &reg, 1,
+                       &rdata, sizeof(rdata), 0);
+       KASSERT(!error);
+       rdata |= 3;
+       error = iic_exec(i2c, I2C_OP_WRITE_WITH_STOP, chipid, &reg, 1,
+                       &rdata, sizeof(rdata), 0);
+       KASSERT(!error);
+       DELAY(10000);
+
+       iic_release_bus(i2c, 0);
+
+       /* enable lan chip power */
+       prop_dictionary_get_cstring_nocopy(dict, "lan_power", &pin_enable);
+       if (pin_enable)  {
+               ok = exynos_gpio_pin_reserve(pin_enable, &enable_pin);
+               if (!ok) {
+                       aprint_error_dev(self,
+                               "can't reserve GPIO pin %s\n", pin_enable);
+               } else {
+                       exynos_gpio_pindata_write(&enable_pin, 0);
+                       DELAY(10000);
+                       exynos_gpio_pindata_write(&enable_pin, 1);
+               }
+       } else {
+               aprint_error_dev(self, "failed to lookup lan_power GPIO pin");
+       }
+#endif
+}
+
 
 void
 odroid_device_register_post_config(device_t self, void *aux)
@@ -682,6 +782,7 @@
        exynos_device_register_post_config(self, aux);
 
        if (device_is_a(self, "exyousb")) {
+               exynos_usb_powercycle_lan9730(self);
                exynos_usb_init_usb3503_hub(self);
        }
 }