j720ssp.c revision 1.29.10.1
1 /* $NetBSD: j720ssp.c,v 1.29.10.1 2006/07/13 17:48:49 gdamore Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by IWAMOTO Toshihiro. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* Jornada 720 SSP port. */ 40 41 #include <sys/cdefs.h> 42 __KERNEL_RCSID(0, "$NetBSD: j720ssp.c,v 1.29.10.1 2006/07/13 17:48:49 gdamore Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/device.h> 47 48 #include <arm/sa11x0/sa11x0_var.h> 49 #include <arm/sa11x0/sa11x0_gpioreg.h> 50 #include <arm/sa11x0/sa11x0_ppcreg.h> 51 #include <arm/sa11x0/sa11x0_sspreg.h> 52 53 #include <hpcarm/dev/j720sspvar.h> 54 55 #ifdef DEBUG 56 #define DPRINTF(arg) printf arg 57 #else 58 #define DPRINTF(arg) /* nothing */ 59 #endif 60 61 #define BIT_INVERT(x) \ 62 do { \ 63 (x) = ((((x) & 0xf0) >> 4) | (((x) & 0x0f) << 4)); \ 64 (x) = ((((x) & 0xcc) >> 2) | (((x) & 0x33) << 2)); \ 65 (x) = ((((x) & 0xaa) >> 1) | (((x) & 0x55) << 1)); \ 66 } while (0) 67 68 static int j720ssp_match(struct device *, struct cfdata *, void *); 69 static void j720ssp_attach(struct device *, struct device *, void *); 70 static int j720ssp_search(struct device *, struct cfdata *, 71 const int *, void *); 72 static int j720ssp_print(void *, const char *); 73 74 CFATTACH_DECL(j720ssp, sizeof(struct j720ssp_softc), 75 j720ssp_match, j720ssp_attach, NULL, NULL); 76 77 78 static int 79 j720ssp_match(struct device *parent, struct cfdata *cf, void *aux) 80 { 81 82 if (strcmp(cf->cf_name, "j720ssp") != 0) 83 return 0; 84 85 return 1; 86 } 87 88 static void 89 j720ssp_attach(struct device *parent, struct device *self, void *aux) 90 { 91 struct j720ssp_softc *sc = (void *)self; 92 struct sa11x0_softc *psc = (void *)parent; 93 struct sa11x0_attach_args *sa = aux; 94 95 sc->sc_iot = psc->sc_iot; 96 sc->sc_gpioh = psc->sc_gpioh; 97 sc->sc_parent = psc; 98 99 if (bus_space_map(sc->sc_iot, sa->sa_addr, sa->sa_size, 0, 100 &sc->sc_ssph)) { 101 printf(": unable to map SSP registers\n"); 102 return; 103 } 104 105 printf("\n"); 106 107 config_search_ia(j720ssp_search, self, "j720ssp", NULL); 108 } 109 110 static int 111 j720ssp_search(struct device *parent, struct cfdata *cf, 112 const int *ldesc, void *aux) 113 { 114 115 if (config_match(parent, cf, NULL) > 0) 116 config_attach(parent, cf, NULL, j720ssp_print); 117 118 return 0; 119 } 120 121 static int 122 j720ssp_print(void *aux, const char *pnp) 123 { 124 125 return pnp ? QUIET : UNCONF; 126 } 127 128 int 129 j720ssp_readwrite(struct j720ssp_softc *sc, int drainfifo, int in, 130 int *out, int wait) 131 { 132 int timeout; 133 134 while (!(bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) & SR_TNF)) 135 continue; 136 137 timeout = 400000; 138 while (bus_space_read_4(sc->sc_iot, sc->sc_gpioh, SAGPIO_PLR) & 0x400) 139 if (--timeout == 0) { 140 DPRINTF(("j720ssp_readwrite: timeout 0\n")); 141 return -1; 142 } 143 if (drainfifo) { 144 while (bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) & 145 SR_RNE) 146 bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_DR); 147 delay(wait); 148 } 149 150 BIT_INVERT(in); 151 bus_space_write_4(sc->sc_iot, sc->sc_ssph, SASSP_DR, in << 8); 152 153 delay(wait); 154 timeout = 100000; 155 while (!(bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_SR) & SR_RNE)) 156 if (--timeout == 0) { 157 DPRINTF(("j720ssp_readwrite: timeout 1\n")); 158 return -1; 159 } 160 161 *out = bus_space_read_4(sc->sc_iot, sc->sc_ssph, SASSP_DR); 162 BIT_INVERT(*out); 163 164 return 0; 165 } 166
Indexes created Thu Oct 02 01:09:59 GMT 2025