[src/trunk]: src/sys/arch/arm/amlogic fix to work with various clock frequenc...

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

details:   https://anonhg.NetBSD.org/src/rev/12bc74f02c2f
branches:  trunk
changeset: 1017582:12bc74f02c2f
user:      ryo <ryo%NetBSD.org@localhost>
date:      Fri Jan 01 07:18:23 2021 +0000

description:
fix to work with various clock frequencies, and add support "amlogic,meson-axg-dwmac"

diffstat:

 sys/arch/arm/amlogic/meson_dwmac.c |  34 +++++++++++++++++++++++++++++-----
 1 files changed, 29 insertions(+), 5 deletions(-)

diffs (85 lines):

diff -r 0959d4c39f4a -r 12bc74f02c2f sys/arch/arm/amlogic/meson_dwmac.c
--- a/sys/arch/arm/amlogic/meson_dwmac.c        Fri Jan 01 07:17:36 2021 +0000
+++ b/sys/arch/arm/amlogic/meson_dwmac.c        Fri Jan 01 07:18:23 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: meson_dwmac.c,v 1.8 2020/02/06 00:32:07 rjs Exp $ */
+/* $NetBSD: meson_dwmac.c,v 1.9 2021/01/01 07:18:23 ryo Exp $ */
 
 /*-
  * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
@@ -28,7 +28,7 @@
 
 #include <sys/cdefs.h>
 
-__KERNEL_RCSID(0, "$NetBSD: meson_dwmac.c,v 1.8 2020/02/06 00:32:07 rjs Exp $");
+__KERNEL_RCSID(0, "$NetBSD: meson_dwmac.c,v 1.9 2021/01/01 07:18:23 ryo Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -61,6 +61,7 @@
        "amlogic,meson8b-dwmac",
        "amlogic,meson-gx-dwmac",
        "amlogic,meson-gxbb-dwmac",
+       "amlogic,meson-axg-dwmac",
        NULL
 };
 
@@ -101,7 +102,8 @@
        u_int tx_delay;
        uint32_t val;
 
-       const u_int div = clk_get_rate(clkin) / 250000000;
+#define DIV_ROUND_OFF(x, y)    (((x) + (y) / 2) / (y))
+       const u_int div = DIV_ROUND_OFF(clk_get_rate(clkin), 250000000);
 
        if (of_getprop_uint32(phandle, "amlogic,tx-delay-ns", &tx_delay) != 0)
                tx_delay = 2;
@@ -153,6 +155,8 @@
        struct dwc_gmac_softc * const sc = device_private(self);
        struct fdt_attach_args * const faa = aux;
        const int phandle = faa->faa_phandle;
+       int miiclk, phandle_phy, phy = MII_PHY_ANY;
+       u_int miiclk_rate;
        bus_space_handle_t prgeth_bsh;
        struct fdtbus_reset *rst_gmac;
        struct clk *clk_gmac, *clk_in[2];
@@ -196,6 +200,12 @@
                aprint_error(": missing 'phy-mode' property\n");
                return;
        }
+       phandle_phy = fdtbus_get_phandle(phandle, "phy-handle");
+       if (phandle_phy > 0) {
+               of_getprop_uint32(phandle_phy, "reg", &phy);
+       } else {
+               phandle_phy = phandle;
+       }
 
        if (strcmp(phy_mode, "rgmii") == 0) {
                meson_dwmac_set_mode_rgmii(phandle, sc->sc_bst, prgeth_bsh, clk_in[0]);
@@ -226,10 +236,24 @@
        }
        aprint_normal_dev(self, "interrupting on %s\n", intrstr);
 
-       if (meson_dwmac_reset(phandle) != 0)
+       if (meson_dwmac_reset(phandle_phy) != 0)
                aprint_error_dev(self, "PHY reset failed\n");
 
-       dwc_gmac_attach(sc, MII_PHY_ANY, GMAC_MII_CLK_100_150M_DIV62);
+       miiclk_rate = clk_get_rate(clk_gmac);
+       if (miiclk_rate > 250 * 1000 * 1000)
+               miiclk = GMAC_MII_CLK_250_300M_DIV124;
+       else if (miiclk_rate > 150 * 1000 * 1000)
+               miiclk = GMAC_MII_CLK_150_250M_DIV102;
+       else if (miiclk_rate > 100 * 1000 * 1000)
+               miiclk = GMAC_MII_CLK_100_150M_DIV62;
+       else if (miiclk_rate > 60 * 1000 * 1000)
+               miiclk = GMAC_MII_CLK_60_100M_DIV42;
+       else if (miiclk_rate > 35 * 1000 * 1000)
+               miiclk = GMAC_MII_CLK_35_60M_DIV26;
+       else
+               miiclk = GMAC_MII_CLK_25_35M_DIV16;
+
+       dwc_gmac_attach(sc, phy, miiclk);
 }
 
 CFATTACH_DECL_NEW(meson_dwmac, sizeof(struct dwc_gmac_softc),