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
tx39spi_match(device_t parent,cfdata_t cf,void * aux)63 tx39spi_match(device_t parent, cfdata_t cf, void *aux)
64 {
65 return (ATTACH_NORMAL);
66 }
67
68 void
tx39spi_attach(device_t parent,device_t self,void * aux)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
tx39spi_search(device_t parent,cfdata_t cf,const int * ldesc,void * aux)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
tx39spi_print(void * aux,const char * pnp)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
tx39spi_intr(void *)129 tx39spi_intr(void *)
130 {
131 return 0;
132 }
133 #endif
134
135 int
tx39spi_is_empty(struct tx39spi_softc * sc)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
tx39spi_put_word(struct tx39spi_softc * sc,int w)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
tx39spi_get_word(struct tx39spi_softc * sc)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
tx39spi_enable(struct tx39spi_softc * sc,int n)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
tx39spi_delayval(struct tx39spi_softc * sc,int n)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
tx39spi_baudrate(struct tx39spi_softc * sc,int n)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
tx39spi_word(struct tx39spi_softc * sc,int n)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
tx39spi_phapol(struct tx39spi_softc * sc,int n)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
tx39spi_clkpol(struct tx39spi_softc * sc,int n)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
tx39spi_lsb(struct tx39spi_softc * sc,int n)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