1 /* $OpenBSD: stfpciephy.c,v 1.1 2023/07/08 10:06:14 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2023 Mark Kettenis <kettenis@openbsd.org> 4 * 5 * Permission to use, copy, modify, and distribute this software for any 6 * purpose with or without fee is hereby granted, provided that the above 7 * copyright notice and this permission notice appear in all copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16 */ 17 18 #include <sys/param.h> 19 #include <sys/systm.h> 20 #include <sys/device.h> 21 22 #include <machine/intr.h> 23 #include <machine/bus.h> 24 #include <machine/fdt.h> 25 26 #include <dev/ofw/openfirm.h> 27 #include <dev/ofw/ofw_clock.h> 28 #include <dev/ofw/ofw_misc.h> 29 #include <dev/ofw/fdt.h> 30 31 #define PCIE_KVO_LEVEL 0x28 32 #define PCIE_KVO_FINE_TUNE_LEVEL 0x91 33 #define PCIE_KVO_TUNE_SIGNAL 0x80 34 #define PCIE_KVO_FINE_TUNE_SIGNAL 0x0c 35 36 #define HREAD4(sc, reg) \ 37 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) 38 #define HWRITE4(sc, reg, val) \ 39 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 40 #define HSET4(sc, reg, bits) \ 41 HWRITE4((sc), (reg), HREAD4((sc), (reg)) | (bits)) 42 #define HCLR4(sc, reg, bits) \ 43 HWRITE4((sc), (reg), HREAD4((sc), (reg)) & ~(bits)) 44 45 struct stfpciephy_softc { 46 struct device sc_dev; 47 bus_space_tag_t sc_iot; 48 bus_space_handle_t sc_ioh; 49 50 struct phy_device sc_pd; 51 }; 52 53 int stfpciephy_match(struct device *, void *, void *); 54 void stfpciephy_attach(struct device *, struct device *, void *); 55 56 const struct cfattach stfpciephy_ca = { 57 sizeof (struct stfpciephy_softc), stfpciephy_match, stfpciephy_attach 58 }; 59 60 struct cfdriver stfpciephy_cd = { 61 NULL, "stfpciephy", DV_DULL 62 }; 63 64 int stfpciephy_enable(void *, uint32_t *); 65 66 int 67 stfpciephy_match(struct device *parent, void *match, void *aux) 68 { 69 struct fdt_attach_args *faa = aux; 70 71 return OF_is_compatible(faa->fa_node, "starfive,jh7110-pcie-phy"); 72 } 73 74 void 75 stfpciephy_attach(struct device *parent, struct device *self, void *aux) 76 { 77 struct stfpciephy_softc *sc = (struct stfpciephy_softc *)self; 78 struct fdt_attach_args *faa = aux; 79 80 if (faa->fa_nreg < 1) { 81 printf(": no registers\n"); 82 return; 83 } 84 85 sc->sc_iot = faa->fa_iot; 86 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, 87 faa->fa_reg[0].size, 0, &sc->sc_ioh)) { 88 printf(": can't map registers\n"); 89 return; 90 } 91 92 printf("\n"); 93 94 HWRITE4(sc, PCIE_KVO_LEVEL, PCIE_KVO_FINE_TUNE_LEVEL); 95 HWRITE4(sc, PCIE_KVO_TUNE_SIGNAL, PCIE_KVO_FINE_TUNE_SIGNAL); 96 97 sc->sc_pd.pd_node = faa->fa_node; 98 sc->sc_pd.pd_cookie = sc; 99 sc->sc_pd.pd_enable = stfpciephy_enable; 100 phy_register(&sc->sc_pd); 101 } 102 103 int 104 stfpciephy_enable(void *cookie, uint32_t *cells) 105 { 106 return 0; 107 } 108