1 /* $OpenBSD: aplsart.c,v 1.2 2022/06/13 12:40:30 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2022 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 #include <sys/extent.h> 22 #include <sys/malloc.h> 23 #include <sys/mutex.h> 24 25 #include <machine/intr.h> 26 #include <machine/bus.h> 27 #include <machine/fdt.h> 28 29 #include <dev/ofw/openfirm.h> 30 #include <dev/ofw/fdt.h> 31 32 #define SART2_CONFIG(idx) (0x0000 + 4 * (idx)) 33 #define SART2_CONFIG_FLAGS_MASK 0xff000000 34 #define SART2_CONFIG_FLAGS_ALLOW 0xff000000 35 #define SART2_ADDR(idx) (0x0040 + 4 * (idx)) 36 37 #define SART3_CONFIG(idx) (0x0000 + 4 * (idx)) 38 #define SART3_CONFIG_FLAGS_MASK 0x000000ff 39 #define SART3_CONFIG_FLAGS_ALLOW 0x000000ff 40 #define SART3_ADDR(idx) (0x0040 + 4 * (idx)) 41 #define SART3_SIZE(idx) (0x0080 + 4 * (idx)) 42 43 #define SART_NUM_ENTRIES 16 44 #define SART_ADDR_SHIFT 12 45 #define SART_SIZE_SHIFT 12 46 47 #define HREAD4(sc, reg) \ 48 (bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, (reg))) 49 #define HWRITE4(sc, reg, val) \ 50 bus_space_write_4((sc)->sc_iot, (sc)->sc_ioh, (reg), (val)) 51 52 struct aplsart_softc { 53 struct device sc_dev; 54 bus_space_tag_t sc_iot; 55 bus_space_handle_t sc_ioh; 56 uint32_t sc_phandle; 57 int sc_version; 58 }; 59 60 int aplsart_match(struct device *, void *, void *); 61 void aplsart_attach(struct device *, struct device *, void *); 62 63 const struct cfattach aplsart_ca = { 64 sizeof (struct aplsart_softc), aplsart_match, aplsart_attach 65 }; 66 67 struct cfdriver aplsart_cd = { 68 NULL, "aplsart", DV_DULL 69 }; 70 71 int 72 aplsart_match(struct device *parent, void *match, void *aux) 73 { 74 struct fdt_attach_args *faa = aux; 75 76 return OF_is_compatible(faa->fa_node, "apple,t6000-sart") || 77 OF_is_compatible(faa->fa_node, "apple,t8103-sart"); 78 } 79 80 void 81 aplsart_attach(struct device *parent, struct device *self, void *aux) 82 { 83 struct aplsart_softc *sc = (struct aplsart_softc *)self; 84 struct fdt_attach_args *faa = aux; 85 86 if (faa->fa_nreg < 1) { 87 printf(": no registers\n"); 88 return; 89 } 90 91 sc->sc_iot = faa->fa_iot; 92 if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, 93 faa->fa_reg[0].size, 0, &sc->sc_ioh)) { 94 printf(": can't map registers\n"); 95 return; 96 } 97 98 sc->sc_phandle = OF_getpropint(faa->fa_node, "phandle", 0); 99 100 if (OF_is_compatible(faa->fa_node, "apple,t8103-sart")) 101 sc->sc_version = 2; 102 if (OF_is_compatible(faa->fa_node, "apple,t6000-sart")) 103 sc->sc_version = 3; 104 105 printf("\n"); 106 } 107 108 int 109 aplsart2_map(struct aplsart_softc *sc, bus_addr_t addr, bus_size_t size) 110 { 111 uint32_t conf; 112 int i; 113 114 for (i = 0; i < SART_NUM_ENTRIES; i++) { 115 conf = HREAD4(sc, SART2_CONFIG(i)); 116 if (conf & SART2_CONFIG_FLAGS_MASK) 117 continue; 118 119 HWRITE4(sc, SART2_ADDR(i), addr >> SART_ADDR_SHIFT); 120 HWRITE4(sc, SART2_CONFIG(i), 121 size >> SART_SIZE_SHIFT | SART2_CONFIG_FLAGS_ALLOW); 122 return 0; 123 } 124 125 return ENOENT; 126 } 127 128 int 129 aplsart3_map(struct aplsart_softc *sc, bus_addr_t addr, bus_size_t size) 130 { 131 uint32_t conf; 132 int i; 133 134 for (i = 0; i < SART_NUM_ENTRIES; i++) { 135 conf = HREAD4(sc, SART3_CONFIG(i)); 136 if (conf & SART3_CONFIG_FLAGS_MASK) 137 continue; 138 139 HWRITE4(sc, SART3_ADDR(i), addr >> SART_ADDR_SHIFT); 140 HWRITE4(sc, SART3_SIZE(i), size >> SART_SIZE_SHIFT); 141 HWRITE4(sc, SART3_CONFIG(i), SART3_CONFIG_FLAGS_ALLOW); 142 return 0; 143 } 144 145 return ENOENT; 146 } 147 148 int 149 aplsart_map(uint32_t phandle, bus_addr_t addr, bus_size_t size) 150 { 151 struct aplsart_softc *sc; 152 int i; 153 154 for (i = 0; i < aplsart_cd.cd_ndevs; i++) { 155 sc = (struct aplsart_softc *)aplsart_cd.cd_devs[i]; 156 157 if (sc->sc_phandle == phandle) { 158 if (sc->sc_version == 2) 159 return aplsart2_map(sc, addr, size); 160 else 161 return aplsart3_map(sc, addr, size); 162 } 163 } 164 165 return ENXIO; 166 } 167