[src/trunk]: src/sys/arch/arm/sunxi Support snps, reset-gpio property and deas...

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

details:   https://anonhg.NetBSD.org/src/rev/fb9090afbfd4
branches:  trunk
changeset: 826967:fb9090afbfd4
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Sat Oct 07 19:42:45 2017 +0000

description:
Support snps,reset-gpio property and deassert optional stmmaceth reset.

diffstat:

 sys/arch/arm/sunxi/sunxi_gmac.c |  46 +++++++++++++++++++++++++++++++++++++++-
 1 files changed, 44 insertions(+), 2 deletions(-)

diffs (101 lines):

diff -r 69e7448e2b43 -r fb9090afbfd4 sys/arch/arm/sunxi/sunxi_gmac.c
--- a/sys/arch/arm/sunxi/sunxi_gmac.c   Sat Oct 07 19:41:51 2017 +0000
+++ b/sys/arch/arm/sunxi/sunxi_gmac.c   Sat Oct 07 19:42:45 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: sunxi_gmac.c,v 1.1 2017/10/07 13:28:59 jmcneill Exp $ */
+/* $NetBSD: sunxi_gmac.c,v 1.2 2017/10/07 19:42:45 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -28,13 +28,14 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: sunxi_gmac.c,v 1.1 2017/10/07 13:28:59 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sunxi_gmac.c,v 1.2 2017/10/07 19:42:45 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
 #include <sys/device.h>
 #include <sys/intr.h>
 #include <sys/systm.h>
+#include <sys/gpio.h>
 
 #include <net/if.h>
 #include <net/if_ether.h>
@@ -56,6 +57,36 @@
 };
 
 static int
+sunxi_gmac_reset(const int phandle)
+{
+       struct fdtbus_gpio_pin *pin_reset;
+       const u_int *reset_delay_us;
+       bool reset_active_low;
+       int len, val;
+
+       pin_reset = fdtbus_gpio_acquire(phandle, "snps,reset-gpio", GPIO_PIN_OUTPUT);
+       if (pin_reset == NULL)
+               return 0;
+
+       reset_delay_us = fdtbus_get_prop(phandle, "snps,reset-delays-us", &len);
+       if (reset_delay_us == NULL || len != 12)
+               return ENXIO;
+
+       reset_active_low = of_hasprop(phandle, "snps,reset-active-low");
+
+       val = reset_active_low ? 1 : 0;
+
+       fdtbus_gpio_write(pin_reset, val);
+       delay(be32toh(reset_delay_us[0]));
+       fdtbus_gpio_write(pin_reset, !val);
+       delay(be32toh(reset_delay_us[1]));
+       fdtbus_gpio_write(pin_reset, val);
+       delay(be32toh(reset_delay_us[2]));
+
+       return 0;
+}
+
+static int
 sunxi_gmac_intr(void *arg)
 {
        return dwc_gmac_intr(arg);
@@ -76,6 +107,7 @@
        struct fdt_attach_args * const faa = aux;
        const int phandle = faa->faa_phandle;
        struct clk *clk_gmac, *clk_gmac_tx;
+       struct fdtbus_reset *rst_gmac;
        const char *phy_mode;
        char intrstr[128];
        bus_addr_t addr;
@@ -106,6 +138,8 @@
                return;
        }
 
+       rst_gmac = fdtbus_reset_get(phandle, "stmmaceth");
+
        phy_mode = fdtbus_get_string(phandle, "phy-mode");
        if (phy_mode == NULL) {
                aprint_error(": missing 'phy-mode' property\n");
@@ -131,6 +165,11 @@
                return;
        }
 
+       if (rst_gmac != NULL && fdtbus_reset_deassert(rst_gmac) != 0) {
+               aprint_error(": couldn't de-assert reset\n");
+               return;
+       }
+
        aprint_naive("\n");
        aprint_normal(": GMAC\n");
 
@@ -140,6 +179,9 @@
        }
        aprint_normal_dev(self, "interrupting on %s\n", intrstr);
 
+       if (sunxi_gmac_reset(phandle) != 0)
+               aprint_error_dev(self, "PHY reset failed\n");
+
        dwc_gmac_attach(sc, GMAC_MII_CLK_150_250M_DIV102);
 }