On Tue, Apr 04, 2023 at 10:59:56PM +1000, David Gwynne wrote:
>
>
> > On 4 Apr 2023, at 20:37, Mark Kettenis <[email protected]> wrote:
> >
> >> Date: Tue, 4 Apr 2023 09:49:40 +1000
> >> From: David Gwynne <[email protected]>
> >>
> >> i did this when i was trying to figure out why TX wasn't working on the
> >> nanopi r5s before figuring out that problem was because we didn't have
> >> rkiovd.
> >>
> >> at the very least it should future proof dwqe against more phy setups,
> >> and provides a decent example of how to interpret those fdt properties.
> >>
> >> ok?
> >
> > Oh wow. I always thought those properties are purely about enabling
> > the internal delays of the PHY and came in addition to the delays
> > configured in the MAC. But you're right, that isn't what the device
> > tree bindings say and isn't what the Linux driver implements. So this
> > is indeed the right thing to do. And it will make the rock-3a work
> > once I correctly implement configuring the internal delay for
> > rgephy(4).
> >
> > That said, I think that once again you are doing too much DT checking.
> > Many of the options you're now erroring out on are optional. And
> > there actually is a reasonable chance that the interface will work if
> > they're absent, especially if the firmware already initializes the
> > SoC-specific GRF registers. I don't think we should even print any
> > warnings.
>
> having stared inside some boot loaders recently i have mixed feelings about
> this. i guess they can only get better from here though, right?
>
> > If you make dwqe_rockchip_setup() specific to the rk3568 (no objection
> > to that), you should probably rename it to dwqe_rk3568_setup().
>
> alright.
>
> > And a style issue; please don't add parentheses around trivial
> > function return values in code that doesn't already use that style.
> > We moved away from that style years ago...
>
> yeah, sorry. muscle memory.
>
> i'll fix these up tomorrow and send it around again.
this still works for me on the r5s. e25 doesnt use onboard gmac.
Index: if_dwqe_fdt.c
===================================================================
RCS file: /cvs/src/sys/dev/fdt/if_dwqe_fdt.c,v
retrieving revision 1.5
diff -u -p -r1.5 if_dwqe_fdt.c
--- if_dwqe_fdt.c 26 Mar 2023 21:44:46 -0000 1.5
+++ if_dwqe_fdt.c 5 Apr 2023 06:06:57 -0000
@@ -63,7 +63,7 @@
int dwqe_fdt_match(struct device *, void *, void *);
void dwqe_fdt_attach(struct device *, struct device *, void *);
-void dwqe_setup_rockchip(struct dwqe_softc *);
+void dwqe_setup_rk3568(struct dwqe_softc *);
void dwqe_mii_statchg_rk3568(struct device *);
void dwqe_mii_statchg_rk3588(struct device *);
@@ -138,7 +138,7 @@ dwqe_fdt_attach(struct device *parent, s
/* Do hardware specific initializations. */
if (OF_is_compatible(faa->fa_node, "rockchip,rk3568-gmac"))
- dwqe_setup_rockchip(sc);
+ dwqe_setup_rk3568(sc);
/* Power up PHY. */
phy_supply = OF_getpropint(faa->fa_node, "phy-supply", 0);
@@ -266,41 +266,62 @@ dwqe_reset_phy(struct dwqe_softc *sc, ui
#define RK3568_GRF_GMACx_CON1(x) (0x0384 + (x) * 0x8)
#define RK3568_GMAC_PHY_INTF_SEL_RGMII ((0x7 << 4) << 16 |
(0x1 << 4))
#define RK3568_GMAC_PHY_INTF_SEL_RMII ((0x7 << 4) << 16 | (0x4 << 4))
-#define RK3568_GMAC_TXCLK_DLY_ENA ((1 << 0) << 16 | (1 << 0))
-#define RK3568_GMAC_RXCLK_DLY_ENA ((1 << 1) << 16 | (1 << 1))
+#define RK3568_GMAC_TXCLK_DLY_SET(_v) ((1 << 0) << 16 | ((_v) << 0))
+#define RK3568_GMAC_RXCLK_DLY_SET(_v) ((1 << 1) << 16 | ((_v) << 1))
void dwqe_mii_statchg_rk3568_task(void *);
void
-dwqe_setup_rockchip(struct dwqe_softc *sc)
+dwqe_setup_rk3568(struct dwqe_softc *sc)
{
+ char phy_mode[32];
struct regmap *rm;
uint32_t grf;
int tx_delay, rx_delay;
+ uint32_t iface;
grf = OF_getpropint(sc->sc_node, "rockchip,grf", 0);
rm = regmap_byphandle(grf);
if (rm == NULL)
return;
+ if (OF_getprop(sc->sc_node, "phy-mode",
+ phy_mode, sizeof(phy_mode)) <= 0)
+ return;
+
tx_delay = OF_getpropint(sc->sc_node, "tx_delay", 0x30);
rx_delay = OF_getpropint(sc->sc_node, "rx_delay", 0x10);
- if (OF_is_compatible(sc->sc_node, "rockchip,rk3568-gmac")) {
- /* Program clock delay lines. */
- regmap_write_4(rm, RK3568_GRF_GMACx_CON0(sc->sc_gmac_id),
- RK3568_GMAC_CLK_TX_DL_CFG(tx_delay) |
- RK3568_GMAC_CLK_RX_DL_CFG(rx_delay));
-
- /* Use RGMII interface and enable clock delay. */
- regmap_write_4(rm, RK3568_GRF_GMACx_CON1(sc->sc_gmac_id),
- RK3568_GMAC_PHY_INTF_SEL_RGMII |
- RK3568_GMAC_TXCLK_DLY_ENA |
- RK3568_GMAC_RXCLK_DLY_ENA);
+ if (strcmp(phy_mode, "rgmii") == 0) {
+ iface = RK3568_GMAC_PHY_INTF_SEL_RGMII;
+ } else if (strcmp(phy_mode, "rgmii-id") == 0) {
+ iface = RK3568_GMAC_PHY_INTF_SEL_RGMII;
+ /* id is "internal delay" */
+ tx_delay = rx_delay = 0;
+ } else if (strcmp(phy_mode, "rgmii-rxid") == 0) {
+ iface = RK3568_GMAC_PHY_INTF_SEL_RGMII;
+ rx_delay = 0;
+ } else if (strcmp(phy_mode, "rgmii-txid") == 0) {
+ iface = RK3568_GMAC_PHY_INTF_SEL_RGMII;
+ tx_delay = 0;
+ } else if (strcmp(phy_mode, "rmii") == 0) {
+ iface = RK3568_GMAC_PHY_INTF_SEL_RMII;
+ tx_delay = rx_delay = 0;
+ } else
+ return;
- task_set(&sc->sc_statchg_task,
- dwqe_mii_statchg_rk3568_task, sc);
- }
+ /* Program clock delay lines. */
+ regmap_write_4(rm, RK3568_GRF_GMACx_CON0(sc->sc_gmac_id),
+ RK3568_GMAC_CLK_TX_DL_CFG(tx_delay) |
+ RK3568_GMAC_CLK_RX_DL_CFG(rx_delay));
+
+ /* Set interface and enable/disable clock delay. */
+ regmap_write_4(rm, RK3568_GRF_GMACx_CON1(sc->sc_gmac_id), iface |
+ RK3568_GMAC_TXCLK_DLY_SET(tx_delay > 0 ? 1 : 0) |
+ RK3568_GMAC_RXCLK_DLY_SET(rx_delay > 0 ? 1 : 0));
+
+ task_set(&sc->sc_statchg_task,
+ dwqe_mii_statchg_rk3568_task, sc);
}
void
