tx39spi.c revision 1.2
1 /* $NetBSD: tx39spi.c,v 1.2 2005/06/30 17:03:53 drochner Exp $ */ 2 3 /*- 4 * Copyright (c) 2005 HAMAJIMA Katsuomi. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Toshiba TX3912/3922 SPI module 30 */ 31 32 #include <sys/cdefs.h> 33 34 __KERNEL_RCSID(0, "$NetBSD: tx39spi.c,v 1.2 2005/06/30 17:03:53 drochner Exp $"); 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 #include <hpcmips/tx/tx39var.h> 40 #include <hpcmips/tx/tx39spivar.h> 41 #include <hpcmips/tx/tx39spireg.h> 42 #include <hpcmips/tx/tx39icureg.h> 43 44 #include "locators.h" 45 46 struct tx39spi_softc { 47 struct device sc_dev; 48 tx_chipset_tag_t sc_tc; 49 int sc_attached; 50 }; 51 52 static int tx39spi_match(struct device *, struct cfdata *, void *); 53 static void tx39spi_attach(struct device *, struct device *, void *); 54 static int tx39spi_search(struct device *, struct cfdata *, 55 const locdesc_t *, void *); 56 static int tx39spi_print(void *, const char *); 57 #ifndef USE_POLL 58 static int tx39spi_intr(void *); 59 #endif 60 61 CFATTACH_DECL(tx39spi, sizeof(struct tx39spi_softc), 62 tx39spi_match, tx39spi_attach, NULL, NULL); 63 64 int 65 tx39spi_match(struct device *parent, struct cfdata *cf, void *aux) 66 { 67 return (ATTACH_NORMAL); 68 } 69 70 void 71 tx39spi_attach(struct device *parent, struct device *self, void *aux) 72 { 73 struct txsim_attach_args *ta = aux; 74 struct tx39spi_softc *sc = (void*)self; 75 tx_chipset_tag_t tc = sc->sc_tc = ta->ta_tc; 76 txreg_t reg; 77 78 reg = tx_conf_read(tc, TX39_SPICTRL_REG); 79 reg &= ~(TX39_SPICTRL_ENSPI); 80 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 81 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT); 82 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIERRINT); 83 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT); 84 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIEMPTYINT); 85 86 #ifndef USE_POLL 87 tx_intr_establish(tc, MAKEINTR(5, TX39_INTRSTATUS5_SPI), 88 IST_EDGE, IPL_TTY, tx39spi_intr, sc); 89 #endif 90 printf("\n"); 91 92 config_search_ia(tx39spi_search, self, "txspiif", tx39spi_print); 93 } 94 95 int 96 tx39spi_search(struct device *parent, struct cfdata *cf, 97 const locdesc_t *ldesc, void *aux) 98 { 99 struct tx39spi_softc *sc = (void*)parent; 100 struct txspi_attach_args sa; 101 102 sa.sa_tc = sc->sc_tc; 103 sa.sa_slot = cf->cf_loc[TXSPIIFCF_SLOT]; 104 105 if (sa.sa_slot == TXSPIIFCF_SLOT_DEFAULT) { 106 printf("tx39spi_search: wildcarded slot, skipping\n"); 107 return 0; 108 } 109 110 if (!(sc->sc_attached & (1 << sa.sa_slot)) && /* not attached slot */ 111 config_match(parent, cf, &sa)) { 112 config_attach(parent, cf, &sa, tx39spi_print); 113 sc->sc_attached |= (1 << sa.sa_slot); 114 } 115 116 return 0; 117 } 118 119 int 120 tx39spi_print(void *aux, const char *pnp) 121 { 122 struct txspi_attach_args *sa = aux; 123 124 aprint_normal(" slot %d", sa->sa_slot); 125 126 return (QUIET); 127 } 128 129 #ifndef USE_POLL 130 int 131 tx39spi_intr(void *) 132 { 133 return 0; 134 } 135 #endif 136 137 int 138 tx39spi_is_empty(struct tx39spi_softc *sc) 139 { 140 return tx_conf_read(sc->sc_tc, TX39_SPICTRL_REG) & (TX39_SPICTRL_EMPTY); 141 } 142 143 void 144 tx39spi_put_word(struct tx39spi_softc *sc, int w) 145 { 146 tx_chipset_tag_t tc = sc->sc_tc; 147 #ifdef USE_POLL 148 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIBUFAVAILINT)) 149 ; 150 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT); 151 #endif 152 tx_conf_write(tc, TX39_SPITXHOLD_REG , w & 0xffff); 153 } 154 155 int 156 tx39spi_get_word(struct tx39spi_softc *sc) 157 { 158 tx_chipset_tag_t tc = sc->sc_tc; 159 #ifdef USE_POLL 160 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIRCVINT)) 161 ; 162 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT); 163 #endif 164 return tx_conf_read(tc, TX39_SPIRXHOLD_REG) & 0xffff; 165 } 166 167 void 168 tx39spi_enable(struct tx39spi_softc *sc, int n) 169 { 170 tx_chipset_tag_t tc = sc->sc_tc; 171 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 172 if (n) 173 reg |= (TX39_SPICTRL_ENSPI); 174 else 175 reg &= ~(TX39_SPICTRL_ENSPI); 176 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 177 } 178 179 void 180 tx39spi_delayval(struct tx39spi_softc *sc, int n) 181 { 182 tx_chipset_tag_t tc = sc->sc_tc; 183 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 184 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_DELAYVAL_SET(reg, n)); 185 } 186 187 void 188 tx39spi_baudrate(struct tx39spi_softc *sc, int n) 189 { 190 tx_chipset_tag_t tc = sc->sc_tc; 191 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 192 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_BAUDRATE_SET(reg, n)); 193 } 194 195 void 196 tx39spi_word(struct tx39spi_softc *sc, int n) 197 { 198 tx_chipset_tag_t tc = sc->sc_tc; 199 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 200 if (n) 201 reg |= (TX39_SPICTRL_WORD); 202 else 203 reg &= ~(TX39_SPICTRL_WORD); 204 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 205 } 206 207 void 208 tx39spi_phapol(struct tx39spi_softc *sc, int n) 209 { 210 tx_chipset_tag_t tc = sc->sc_tc; 211 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 212 if (n) 213 reg |= (TX39_SPICTRL_PHAPOL); 214 else 215 reg &= ~(TX39_SPICTRL_PHAPOL); 216 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 217 } 218 219 void 220 tx39spi_clkpol(struct tx39spi_softc *sc, int n) 221 { 222 tx_chipset_tag_t tc = sc->sc_tc; 223 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 224 if (n) 225 reg |= (TX39_SPICTRL_CLKPOL); 226 else 227 reg &= ~(TX39_SPICTRL_CLKPOL); 228 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 229 } 230 231 void 232 tx39spi_lsb(struct tx39spi_softc *sc, int n) 233 { 234 tx_chipset_tag_t tc = sc->sc_tc; 235 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 236 if (n) 237 reg |= (TX39_SPICTRL_LSB); 238 else 239 reg &= ~(TX39_SPICTRL_LSB); 240 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 241 } 242
Indexes created Thu Oct 30 03:10:01 GMT 2025