tx39spi.c revision 1.5
1 /* $NetBSD: tx39spi.c,v 1.5 2012/10/27 17:17:54 chs 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 1.5 2012/10/27 17:17:54 chs 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 tx_chipset_tag_t sc_tc; 48 int sc_attached; 49 }; 50 51 static int tx39spi_match(device_t, cfdata_t, void *); 52 static void tx39spi_attach(device_t, device_t, void *); 53 static int tx39spi_search(device_t, cfdata_t, const int *, void *); 54 static int tx39spi_print(void *, const char *); 55 #ifndef USE_POLL 56 static int tx39spi_intr(void *); 57 #endif 58 59 CFATTACH_DECL_NEW(tx39spi, sizeof(struct tx39spi_softc), 60 tx39spi_match, tx39spi_attach, NULL, NULL); 61 62 int 63 tx39spi_match(device_t parent, cfdata_t cf, void *aux) 64 { 65 return (ATTACH_NORMAL); 66 } 67 68 void 69 tx39spi_attach(device_t parent, device_t self, void *aux) 70 { 71 struct txsim_attach_args *ta = aux; 72 struct tx39spi_softc *sc = device_private(self); 73 tx_chipset_tag_t tc = sc->sc_tc = ta->ta_tc; 74 txreg_t reg; 75 76 reg = tx_conf_read(tc, TX39_SPICTRL_REG); 77 reg &= ~(TX39_SPICTRL_ENSPI); 78 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 79 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT); 80 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIERRINT); 81 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT); 82 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIEMPTYINT); 83 84 #ifndef USE_POLL 85 tx_intr_establish(tc, MAKEINTR(5, TX39_INTRSTATUS5_SPI), 86 IST_EDGE, IPL_TTY, tx39spi_intr, sc); 87 #endif 88 printf("\n"); 89 90 config_search_ia(tx39spi_search, self, "txspiif", tx39spi_print); 91 } 92 93 int 94 tx39spi_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 95 { 96 struct tx39spi_softc *sc = device_private(parent); 97 struct txspi_attach_args sa; 98 99 sa.sa_tc = sc->sc_tc; 100 sa.sa_slot = cf->cf_loc[TXSPIIFCF_SLOT]; 101 102 if (sa.sa_slot == TXSPIIFCF_SLOT_DEFAULT) { 103 printf("tx39spi_search: wildcarded slot, skipping\n"); 104 return 0; 105 } 106 107 if (!(sc->sc_attached & (1 << sa.sa_slot)) && /* not attached slot */ 108 config_match(parent, cf, &sa)) { 109 config_attach(parent, cf, &sa, tx39spi_print); 110 sc->sc_attached |= (1 << sa.sa_slot); 111 } 112 113 return 0; 114 } 115 116 int 117 tx39spi_print(void *aux, const char *pnp) 118 { 119 struct txspi_attach_args *sa = aux; 120 121 aprint_normal(" slot %d", sa->sa_slot); 122 123 return (QUIET); 124 } 125 126 #ifndef USE_POLL 127 int 128 tx39spi_intr(void *) 129 { 130 return 0; 131 } 132 #endif 133 134 int 135 tx39spi_is_empty(struct tx39spi_softc *sc) 136 { 137 return tx_conf_read(sc->sc_tc, TX39_SPICTRL_REG) & (TX39_SPICTRL_EMPTY); 138 } 139 140 void 141 tx39spi_put_word(struct tx39spi_softc *sc, int w) 142 { 143 tx_chipset_tag_t tc = sc->sc_tc; 144 #ifdef USE_POLL 145 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIBUFAVAILINT)) 146 ; 147 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT); 148 #endif 149 tx_conf_write(tc, TX39_SPITXHOLD_REG , w & 0xffff); 150 } 151 152 int 153 tx39spi_get_word(struct tx39spi_softc *sc) 154 { 155 tx_chipset_tag_t tc = sc->sc_tc; 156 #ifdef USE_POLL 157 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIRCVINT)) 158 ; 159 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT); 160 #endif 161 return tx_conf_read(tc, TX39_SPIRXHOLD_REG) & 0xffff; 162 } 163 164 void 165 tx39spi_enable(struct tx39spi_softc *sc, int n) 166 { 167 tx_chipset_tag_t tc = sc->sc_tc; 168 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 169 if (n) 170 reg |= (TX39_SPICTRL_ENSPI); 171 else 172 reg &= ~(TX39_SPICTRL_ENSPI); 173 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 174 } 175 176 void 177 tx39spi_delayval(struct tx39spi_softc *sc, int n) 178 { 179 tx_chipset_tag_t tc = sc->sc_tc; 180 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 181 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_DELAYVAL_SET(reg, n)); 182 } 183 184 void 185 tx39spi_baudrate(struct tx39spi_softc *sc, int n) 186 { 187 tx_chipset_tag_t tc = sc->sc_tc; 188 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 189 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_BAUDRATE_SET(reg, n)); 190 } 191 192 void 193 tx39spi_word(struct tx39spi_softc *sc, int n) 194 { 195 tx_chipset_tag_t tc = sc->sc_tc; 196 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 197 if (n) 198 reg |= (TX39_SPICTRL_WORD); 199 else 200 reg &= ~(TX39_SPICTRL_WORD); 201 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 202 } 203 204 void 205 tx39spi_phapol(struct tx39spi_softc *sc, int n) 206 { 207 tx_chipset_tag_t tc = sc->sc_tc; 208 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 209 if (n) 210 reg |= (TX39_SPICTRL_PHAPOL); 211 else 212 reg &= ~(TX39_SPICTRL_PHAPOL); 213 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 214 } 215 216 void 217 tx39spi_clkpol(struct tx39spi_softc *sc, int n) 218 { 219 tx_chipset_tag_t tc = sc->sc_tc; 220 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 221 if (n) 222 reg |= (TX39_SPICTRL_CLKPOL); 223 else 224 reg &= ~(TX39_SPICTRL_CLKPOL); 225 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 226 } 227 228 void 229 tx39spi_lsb(struct tx39spi_softc *sc, int n) 230 { 231 tx_chipset_tag_t tc = sc->sc_tc; 232 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 233 if (n) 234 reg |= (TX39_SPICTRL_LSB); 235 else 236 reg &= ~(TX39_SPICTRL_LSB); 237 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 238 } 239
Indexes created Wed Oct 29 18:09:52 GMT 2025