1 /* $NetBSD: tx39spi.c,v 1.7 2021/08/07 16:18:54 thorpej 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 1.7 2021/08/07 16:18:54 thorpej 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(self, NULL, 91 CFARGS(.search = tx39spi_search)); 92 } 93 94 int 95 tx39spi_search(device_t parent, cfdata_t cf, const int *ldesc, void *aux) 96 { 97 struct tx39spi_softc *sc = device_private(parent); 98 struct txspi_attach_args sa; 99 100 sa.sa_tc = sc->sc_tc; 101 sa.sa_slot = cf->cf_loc[TXSPIIFCF_SLOT]; 102 103 if (sa.sa_slot == TXSPIIFCF_SLOT_DEFAULT) { 104 printf("tx39spi_search: wildcarded slot, skipping\n"); 105 return 0; 106 } 107 108 if (!(sc->sc_attached & (1 << sa.sa_slot)) && /* not attached slot */ 109 config_probe(parent, cf, &sa)) { 110 config_attach(parent, cf, &sa, tx39spi_print, CFARGS_NONE); 111 sc->sc_attached |= (1 << sa.sa_slot); 112 } 113 114 return 0; 115 } 116 117 int 118 tx39spi_print(void *aux, const char *pnp) 119 { 120 struct txspi_attach_args *sa = aux; 121 122 aprint_normal(" slot %d", sa->sa_slot); 123 124 return (QUIET); 125 } 126 127 #ifndef USE_POLL 128 int 129 tx39spi_intr(void *) 130 { 131 return 0; 132 } 133 #endif 134 135 int 136 tx39spi_is_empty(struct tx39spi_softc *sc) 137 { 138 return tx_conf_read(sc->sc_tc, TX39_SPICTRL_REG) & (TX39_SPICTRL_EMPTY); 139 } 140 141 void 142 tx39spi_put_word(struct tx39spi_softc *sc, int w) 143 { 144 tx_chipset_tag_t tc = sc->sc_tc; 145 #ifdef USE_POLL 146 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIBUFAVAILINT)) 147 ; 148 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIBUFAVAILINT); 149 #endif 150 tx_conf_write(tc, TX39_SPITXHOLD_REG , w & 0xffff); 151 } 152 153 int 154 tx39spi_get_word(struct tx39spi_softc *sc) 155 { 156 tx_chipset_tag_t tc = sc->sc_tc; 157 #ifdef USE_POLL 158 while(!(tx_conf_read(tc, TX39_INTRSTATUS5_REG) & TX39_INTRSTATUS5_SPIRCVINT)) 159 ; 160 tx_conf_write(tc, TX39_INTRCLEAR5_REG, TX39_INTRSTATUS5_SPIRCVINT); 161 #endif 162 return tx_conf_read(tc, TX39_SPIRXHOLD_REG) & 0xffff; 163 } 164 165 void 166 tx39spi_enable(struct tx39spi_softc *sc, int n) 167 { 168 tx_chipset_tag_t tc = sc->sc_tc; 169 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 170 if (n) 171 reg |= (TX39_SPICTRL_ENSPI); 172 else 173 reg &= ~(TX39_SPICTRL_ENSPI); 174 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 175 } 176 177 void 178 tx39spi_delayval(struct tx39spi_softc *sc, int n) 179 { 180 tx_chipset_tag_t tc = sc->sc_tc; 181 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 182 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_DELAYVAL_SET(reg, n)); 183 } 184 185 void 186 tx39spi_baudrate(struct tx39spi_softc *sc, int n) 187 { 188 tx_chipset_tag_t tc = sc->sc_tc; 189 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 190 tx_conf_write(tc, TX39_SPICTRL_REG, TX39_SPICTRL_BAUDRATE_SET(reg, n)); 191 } 192 193 void 194 tx39spi_word(struct tx39spi_softc *sc, int n) 195 { 196 tx_chipset_tag_t tc = sc->sc_tc; 197 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 198 if (n) 199 reg |= (TX39_SPICTRL_WORD); 200 else 201 reg &= ~(TX39_SPICTRL_WORD); 202 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 203 } 204 205 void 206 tx39spi_phapol(struct tx39spi_softc *sc, int n) 207 { 208 tx_chipset_tag_t tc = sc->sc_tc; 209 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 210 if (n) 211 reg |= (TX39_SPICTRL_PHAPOL); 212 else 213 reg &= ~(TX39_SPICTRL_PHAPOL); 214 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 215 } 216 217 void 218 tx39spi_clkpol(struct tx39spi_softc *sc, int n) 219 { 220 tx_chipset_tag_t tc = sc->sc_tc; 221 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 222 if (n) 223 reg |= (TX39_SPICTRL_CLKPOL); 224 else 225 reg &= ~(TX39_SPICTRL_CLKPOL); 226 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 227 } 228 229 void 230 tx39spi_lsb(struct tx39spi_softc *sc, int n) 231 { 232 tx_chipset_tag_t tc = sc->sc_tc; 233 txreg_t reg = tx_conf_read(tc, TX39_SPICTRL_REG); 234 if (n) 235 reg |= (TX39_SPICTRL_LSB); 236 else 237 reg &= ~(TX39_SPICTRL_LSB); 238 tx_conf_write(tc, TX39_SPICTRL_REG, reg); 239 } 240
Indexes created Sun Sep 21 18:09:52 GMT 2025