MFC r260695, r260696, r260884, r260885, r260886, r260887

  Provide a simplified way to specify GPIO pins for the Atmel port.

  Add at91 data so we can convert a PIO unit number into a base address.

  Add at91 standard memory controller helper functions.

  Generalize AT91 NAND support a bit.

  Connect NAND for the SAM9260EK eval board, as well as the HotE HL-201.

  Add nand device and NANDFS into the mix for those at91 boards that have
  support for it at the moment.

10 files changed, 555 insertions, 5 deletions

diff --git a/sys/arm/at91/at91_gpio.h b/sys/arm/at91/at91_gpio.h
new file mode 100644
index 0000000..935e437
--- /dev/null
+++ b/sys/arm/at91/at91_gpio.h
@@ -0,0 +1,296 @@
+/*-
+ * Copyright (c) 2014 M. Warner Losh.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $FreeBSD$ */
+
+#ifndef ARM_AT91_AT91_GPIO_H
+#define ARM_AT91_AT91_GPIO_H
+
+typedef uint32_t at91_pin_t;
+
+#define AT91_PIN_NONE	0xfffffffful	/* No pin / Not GPIO controlled */
+
+/*
+ * Map Atmel PIO pins to a unique number. They are just numbered sequentially.
+ */
+
+#define	AT91_PIN_PA0	(at91_pin_t)0
+#define	AT91_PIN_PA1	(at91_pin_t)1
+#define	AT91_PIN_PA2	(at91_pin_t)2
+#define	AT91_PIN_PA3	(at91_pin_t)3
+#define	AT91_PIN_PA4	(at91_pin_t)4
+#define	AT91_PIN_PA5	(at91_pin_t)5
+#define	AT91_PIN_PA6	(at91_pin_t)6
+#define	AT91_PIN_PA7	(at91_pin_t)7
+#define	AT91_PIN_PA8	(at91_pin_t)8
+#define	AT91_PIN_PA9	(at91_pin_t)9
+#define	AT91_PIN_PA10	(at91_pin_t)10
+#define	AT91_PIN_PA11	(at91_pin_t)11
+#define	AT91_PIN_PA12	(at91_pin_t)12
+#define	AT91_PIN_PA13	(at91_pin_t)13
+#define	AT91_PIN_PA14	(at91_pin_t)14
+#define	AT91_PIN_PA15	(at91_pin_t)15
+#define	AT91_PIN_PA16	(at91_pin_t)16
+#define	AT91_PIN_PA17	(at91_pin_t)17
+#define	AT91_PIN_PA18	(at91_pin_t)18
+#define	AT91_PIN_PA19	(at91_pin_t)19
+#define	AT91_PIN_PA20	(at91_pin_t)20
+#define	AT91_PIN_PA21	(at91_pin_t)21
+#define	AT91_PIN_PA22	(at91_pin_t)22
+#define	AT91_PIN_PA23	(at91_pin_t)23
+#define	AT91_PIN_PA24	(at91_pin_t)24
+#define	AT91_PIN_PA25	(at91_pin_t)25
+#define	AT91_PIN_PA26	(at91_pin_t)26
+#define	AT91_PIN_PA27	(at91_pin_t)27
+#define	AT91_PIN_PA28	(at91_pin_t)28
+#define	AT91_PIN_PA29	(at91_pin_t)29
+#define	AT91_PIN_PA30	(at91_pin_t)30
+#define	AT91_PIN_PA31	(at91_pin_t)31
+#define	AT91_PIN_PB0	(at91_pin_t)32
+#define	AT91_PIN_PB1	(at91_pin_t)33
+#define	AT91_PIN_PB2	(at91_pin_t)34
+#define	AT91_PIN_PB3	(at91_pin_t)35
+#define	AT91_PIN_PB4	(at91_pin_t)36
+#define	AT91_PIN_PB5	(at91_pin_t)37
+#define	AT91_PIN_PB6	(at91_pin_t)38
+#define	AT91_PIN_PB7	(at91_pin_t)39
+#define	AT91_PIN_PB8	(at91_pin_t)40
+#define	AT91_PIN_PB9	(at91_pin_t)41
+#define	AT91_PIN_PB10	(at91_pin_t)42
+#define	AT91_PIN_PB11	(at91_pin_t)43
+#define	AT91_PIN_PB12	(at91_pin_t)44
+#define	AT91_PIN_PB13	(at91_pin_t)45
+#define	AT91_PIN_PB14	(at91_pin_t)46
+#define	AT91_PIN_PB15	(at91_pin_t)47
+#define	AT91_PIN_PB16	(at91_pin_t)48
+#define	AT91_PIN_PB17	(at91_pin_t)49
+#define	AT91_PIN_PB18	(at91_pin_t)50
+#define	AT91_PIN_PB19	(at91_pin_t)51
+#define	AT91_PIN_PB20	(at91_pin_t)52
+#define	AT91_PIN_PB21	(at91_pin_t)53
+#define	AT91_PIN_PB22	(at91_pin_t)54
+#define	AT91_PIN_PB23	(at91_pin_t)55
+#define	AT91_PIN_PB24	(at91_pin_t)56
+#define	AT91_PIN_PB25	(at91_pin_t)57
+#define	AT91_PIN_PB26	(at91_pin_t)58
+#define	AT91_PIN_PB27	(at91_pin_t)59
+#define	AT91_PIN_PB28	(at91_pin_t)60
+#define	AT91_PIN_PB29	(at91_pin_t)61
+#define	AT91_PIN_PB30	(at91_pin_t)62
+#define	AT91_PIN_PB31	(at91_pin_t)63
+#define	AT91_PIN_PC0	(at91_pin_t)64
+#define	AT91_PIN_PC1	(at91_pin_t)65
+#define	AT91_PIN_PC2	(at91_pin_t)66
+#define	AT91_PIN_PC3	(at91_pin_t)67
+#define	AT91_PIN_PC4	(at91_pin_t)68
+#define	AT91_PIN_PC5	(at91_pin_t)69
+#define	AT91_PIN_PC6	(at91_pin_t)70
+#define	AT91_PIN_PC7	(at91_pin_t)71
+#define	AT91_PIN_PC8	(at91_pin_t)72
+#define	AT91_PIN_PC9	(at91_pin_t)73
+#define	AT91_PIN_PC10	(at91_pin_t)74
+#define	AT91_PIN_PC11	(at91_pin_t)75
+#define	AT91_PIN_PC12	(at91_pin_t)76
+#define	AT91_PIN_PC13	(at91_pin_t)77
+#define	AT91_PIN_PC14	(at91_pin_t)78
+#define	AT91_PIN_PC15	(at91_pin_t)79
+#define	AT91_PIN_PC16	(at91_pin_t)80
+#define	AT91_PIN_PC17	(at91_pin_t)81
+#define	AT91_PIN_PC18	(at91_pin_t)82
+#define	AT91_PIN_PC19	(at91_pin_t)83
+#define	AT91_PIN_PC20	(at91_pin_t)84
+#define	AT91_PIN_PC21	(at91_pin_t)85
+#define	AT91_PIN_PC22	(at91_pin_t)86
+#define	AT91_PIN_PC23	(at91_pin_t)87
+#define	AT91_PIN_PC24	(at91_pin_t)88
+#define	AT91_PIN_PC25	(at91_pin_t)89
+#define	AT91_PIN_PC26	(at91_pin_t)90
+#define	AT91_PIN_PC27	(at91_pin_t)91
+#define	AT91_PIN_PC28	(at91_pin_t)92
+#define	AT91_PIN_PC29	(at91_pin_t)93
+#define	AT91_PIN_PC30	(at91_pin_t)94
+#define	AT91_PIN_PC31	(at91_pin_t)95
+#define	AT91_PIN_PD0	(at91_pin_t)96
+#define	AT91_PIN_PD1	(at91_pin_t)97
+#define	AT91_PIN_PD2	(at91_pin_t)98
+#define	AT91_PIN_PD3	(at91_pin_t)99
+#define	AT91_PIN_PD4	(at91_pin_t)100
+#define	AT91_PIN_PD5	(at91_pin_t)101
+#define	AT91_PIN_PD6	(at91_pin_t)102
+#define	AT91_PIN_PD7	(at91_pin_t)103
+#define	AT91_PIN_PD8	(at91_pin_t)104
+#define	AT91_PIN_PD9	(at91_pin_t)105
+#define	AT91_PIN_PD10	(at91_pin_t)106
+#define	AT91_PIN_PD11	(at91_pin_t)107
+#define	AT91_PIN_PD12	(at91_pin_t)108
+#define	AT91_PIN_PD13	(at91_pin_t)109
+#define	AT91_PIN_PD14	(at91_pin_t)110
+#define	AT91_PIN_PD15	(at91_pin_t)111
+#define	AT91_PIN_PD16	(at91_pin_t)112
+#define	AT91_PIN_PD17	(at91_pin_t)113
+#define	AT91_PIN_PD18	(at91_pin_t)114
+#define	AT91_PIN_PD19	(at91_pin_t)115
+#define	AT91_PIN_PD20	(at91_pin_t)116
+#define	AT91_PIN_PD21	(at91_pin_t)117
+#define	AT91_PIN_PD22	(at91_pin_t)118
+#define	AT91_PIN_PD23	(at91_pin_t)119
+#define	AT91_PIN_PD24	(at91_pin_t)120
+#define	AT91_PIN_PD25	(at91_pin_t)121
+#define	AT91_PIN_PD26	(at91_pin_t)122
+#define	AT91_PIN_PD27	(at91_pin_t)123
+#define	AT91_PIN_PD28	(at91_pin_t)124
+#define	AT91_PIN_PD29	(at91_pin_t)125
+#define	AT91_PIN_PD30	(at91_pin_t)126
+#define	AT91_PIN_PD31	(at91_pin_t)127
+#define	AT91_PIN_PE0	(at91_pin_t)128
+#define	AT91_PIN_PE1	(at91_pin_t)129
+#define	AT91_PIN_PE2	(at91_pin_t)130
+#define	AT91_PIN_PE3	(at91_pin_t)131
+#define	AT91_PIN_PE4	(at91_pin_t)132
+#define	AT91_PIN_PE5	(at91_pin_t)133
+#define	AT91_PIN_PE6	(at91_pin_t)134
+#define	AT91_PIN_PE7	(at91_pin_t)135
+#define	AT91_PIN_PE8	(at91_pin_t)136
+#define	AT91_PIN_PE9	(at91_pin_t)137
+#define	AT91_PIN_PE10	(at91_pin_t)138
+#define	AT91_PIN_PE11	(at91_pin_t)139
+#define	AT91_PIN_PE12	(at91_pin_t)140
+#define	AT91_PIN_PE13	(at91_pin_t)141
+#define	AT91_PIN_PE14	(at91_pin_t)142
+#define	AT91_PIN_PE15	(at91_pin_t)143
+#define	AT91_PIN_PE16	(at91_pin_t)144
+#define	AT91_PIN_PE17	(at91_pin_t)145
+#define	AT91_PIN_PE18	(at91_pin_t)146
+#define	AT91_PIN_PE19	(at91_pin_t)147
+#define	AT91_PIN_PE20	(at91_pin_t)148
+#define	AT91_PIN_PE21	(at91_pin_t)149
+#define	AT91_PIN_PE22	(at91_pin_t)150
+#define	AT91_PIN_PE23	(at91_pin_t)151
+#define	AT91_PIN_PE24	(at91_pin_t)152
+#define	AT91_PIN_PE25	(at91_pin_t)153
+#define	AT91_PIN_PE26	(at91_pin_t)154
+#define	AT91_PIN_PE27	(at91_pin_t)155
+#define	AT91_PIN_PE28	(at91_pin_t)156
+#define	AT91_PIN_PE29	(at91_pin_t)157
+#define	AT91_PIN_PE30	(at91_pin_t)158
+#define	AT91_PIN_PE31	(at91_pin_t)159
+#define	AT91_PIN_PF0	(at91_pin_t)160
+#define	AT91_PIN_PF1	(at91_pin_t)161
+#define	AT91_PIN_PF2	(at91_pin_t)162
+#define	AT91_PIN_PF3	(at91_pin_t)163
+#define	AT91_PIN_PF4	(at91_pin_t)164
+#define	AT91_PIN_PF5	(at91_pin_t)165
+#define	AT91_PIN_PF6	(at91_pin_t)166
+#define	AT91_PIN_PF7	(at91_pin_t)167
+#define	AT91_PIN_PF8	(at91_pin_t)168
+#define	AT91_PIN_PF9	(at91_pin_t)169
+#define	AT91_PIN_PF10	(at91_pin_t)170
+#define	AT91_PIN_PF11	(at91_pin_t)171
+#define	AT91_PIN_PF12	(at91_pin_t)172
+#define	AT91_PIN_PF13	(at91_pin_t)173
+#define	AT91_PIN_PF14	(at91_pin_t)174
+#define	AT91_PIN_PF15	(at91_pin_t)175
+#define	AT91_PIN_PF16	(at91_pin_t)176
+#define	AT91_PIN_PF17	(at91_pin_t)177
+#define	AT91_PIN_PF18	(at91_pin_t)178
+#define	AT91_PIN_PF19	(at91_pin_t)179
+#define	AT91_PIN_PF20	(at91_pin_t)180
+#define	AT91_PIN_PF21	(at91_pin_t)181
+#define	AT91_PIN_PF22	(at91_pin_t)182
+#define	AT91_PIN_PF23	(at91_pin_t)183
+#define	AT91_PIN_PF24	(at91_pin_t)184
+#define	AT91_PIN_PF25	(at91_pin_t)185
+#define	AT91_PIN_PF26	(at91_pin_t)186
+#define	AT91_PIN_PF27	(at91_pin_t)187
+#define	AT91_PIN_PF28	(at91_pin_t)188
+#define	AT91_PIN_PF29	(at91_pin_t)189
+#define	AT91_PIN_PF30	(at91_pin_t)190
+#define	AT91_PIN_PF31	(at91_pin_t)191
+#define	AT91_PIN_PG0	(at91_pin_t)192
+#define	AT91_PIN_PG1	(at91_pin_t)193
+#define	AT91_PIN_PG2	(at91_pin_t)194
+#define	AT91_PIN_PG3	(at91_pin_t)195
+#define	AT91_PIN_PG4	(at91_pin_t)196
+#define	AT91_PIN_PG5	(at91_pin_t)197
+#define	AT91_PIN_PG6	(at91_pin_t)198
+#define	AT91_PIN_PG7	(at91_pin_t)199
+#define	AT91_PIN_PG8	(at91_pin_t)200
+#define	AT91_PIN_PG9	(at91_pin_t)201
+#define	AT91_PIN_PG10	(at91_pin_t)202
+#define	AT91_PIN_PG11	(at91_pin_t)203
+#define	AT91_PIN_PG12	(at91_pin_t)204
+#define	AT91_PIN_PG13	(at91_pin_t)205
+#define	AT91_PIN_PG14	(at91_pin_t)206
+#define	AT91_PIN_PG15	(at91_pin_t)207
+#define	AT91_PIN_PG16	(at91_pin_t)208
+#define	AT91_PIN_PG17	(at91_pin_t)209
+#define	AT91_PIN_PG18	(at91_pin_t)210
+#define	AT91_PIN_PG19	(at91_pin_t)211
+#define	AT91_PIN_PG20	(at91_pin_t)212
+#define	AT91_PIN_PG21	(at91_pin_t)213
+#define	AT91_PIN_PG22	(at91_pin_t)214
+#define	AT91_PIN_PG23	(at91_pin_t)215
+#define	AT91_PIN_PG24	(at91_pin_t)216
+#define	AT91_PIN_PG25	(at91_pin_t)217
+#define	AT91_PIN_PG26	(at91_pin_t)218
+#define	AT91_PIN_PG27	(at91_pin_t)219
+#define	AT91_PIN_PG28	(at91_pin_t)220
+#define	AT91_PIN_PG29	(at91_pin_t)221
+#define	AT91_PIN_PG30	(at91_pin_t)222
+#define	AT91_PIN_PG31	(at91_pin_t)223
+#define	AT91_PIN_PH0	(at91_pin_t)224
+#define	AT91_PIN_PH1	(at91_pin_t)225
+#define	AT91_PIN_PH2	(at91_pin_t)226
+#define	AT91_PIN_PH3	(at91_pin_t)227
+#define	AT91_PIN_PH4	(at91_pin_t)228
+#define	AT91_PIN_PH5	(at91_pin_t)229
+#define	AT91_PIN_PH6	(at91_pin_t)230
+#define	AT91_PIN_PH7	(at91_pin_t)231
+#define	AT91_PIN_PH8	(at91_pin_t)232
+#define	AT91_PIN_PH9	(at91_pin_t)233
+#define	AT91_PIN_PH10	(at91_pin_t)234
+#define	AT91_PIN_PH11	(at91_pin_t)235
+#define	AT91_PIN_PH12	(at91_pin_t)236
+#define	AT91_PIN_PH13	(at91_pin_t)237
+#define	AT91_PIN_PH14	(at91_pin_t)238
+#define	AT91_PIN_PH15	(at91_pin_t)239
+#define	AT91_PIN_PH16	(at91_pin_t)240
+#define	AT91_PIN_PH17	(at91_pin_t)241
+#define	AT91_PIN_PH18	(at91_pin_t)242
+#define	AT91_PIN_PH19	(at91_pin_t)243
+#define	AT91_PIN_PH20	(at91_pin_t)244
+#define	AT91_PIN_PH21	(at91_pin_t)245
+#define	AT91_PIN_PH22	(at91_pin_t)246
+#define	AT91_PIN_PH23	(at91_pin_t)247
+#define	AT91_PIN_PH24	(at91_pin_t)248
+#define	AT91_PIN_PH25	(at91_pin_t)249
+#define	AT91_PIN_PH26	(at91_pin_t)250
+#define	AT91_PIN_PH27	(at91_pin_t)251
+#define	AT91_PIN_PH28	(at91_pin_t)252
+#define	AT91_PIN_PH29	(at91_pin_t)253
+#define	AT91_PIN_PH30	(at91_pin_t)254
+#define	AT91_PIN_PH31	(at91_pin_t)255
+
+#endif /* ARM_AT91_AT91_GPIO_H */
diff --git a/sys/arm/at91/at91_smc.c b/sys/arm/at91/at91_smc.c
new file mode 100644
index 0000000..2d59d16
--- /dev/null
+++ b/sys/arm/at91/at91_smc.c
@@ -0,0 +1,91 @@
+/*-
+ * Copyright (c) 2014 M. Warner Losh.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+
+#include <arm/at91/at91reg.h>
+#include <arm/at91/at91_smc.h>
+#include <arm/at91/at91sam9260reg.h>
+
+/*
+ * RD4HW()/WR4HW() read and write at91 hardware register space directly. They
+ * serve the same purpose as the RD4()/WR4() idiom you see in many drivers,
+ * except that those translate to bus_space calls, but in this code we need to
+ * access some devices before bus_space is ready to use.  Of course for this to
+ * work the appropriate static device mappings need to be made in machdep.c.
+ */
+static inline uint32_t 
+RD4HW(uint32_t devbase, uint32_t regoff)
+{
+	
+	return *(volatile uint32_t *)(AT91_BASE + devbase + regoff);
+}
+
+
+static inline void
+WR4HW(uint32_t devbase, uint32_t regoff, uint32_t val)
+{
+	
+	*(volatile uint32_t *)(AT91_BASE + devbase + regoff) = val;
+}
+
+
+void
+at91_smc_setup(int id, int cs, const struct at91_smc_init *smc)
+{
+	// Need a generic way to get this address for all SoCs... Assume 9260 for now...
+	uint32_t base = AT91SAM9260_SMC_BASE + SMC_CS_OFF(cs);
+
+	WR4HW(base, SMC_SETUP, SMC_SETUP_NCS_RD_SETUP(smc->ncs_rd_setup) |
+	      SMC_SETUP_NRD_SETUP(smc->nrd_setup) |
+	      SMC_SETUP_NCS_WR_SETUP(smc->ncs_wr_setup) |
+	      SMC_SETUP_NWE_SETUP(smc->nwe_setup));
+	WR4HW(base, SMC_PULSE, SMC_PULSE_NCS_RD_PULSE(smc->ncs_rd_pulse) |
+	      SMC_PULSE_NRD_PULSE(smc->nrd_pulse) |
+	      SMC_PULSE_NCS_WR_PULSE(smc->ncs_wr_pulse) |
+	      SMC_PULSE_NWE_PULSE(smc->nwe_pulse));
+	WR4HW(base, SMC_CYCLE, SMC_CYCLE_NRD_CYCLE(smc->nrd_cycle) |
+	      SMC_CYCLE_NWE_CYCLE(smc->nwe_cycle));
+	WR4HW(base, SMC_MODE, smc->mode | SMC_MODE_TDF_CYCLES(smc->tdf_cycles));
+}
+
+void
+at91_ebi_enable(int bank)
+{
+
+	WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, (1 << bank) |
+	      RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
+}
+
+void
+at91_ebi_disable(int bank)
+{
+
+	WR4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA, ~(1 << bank) &
+	      RD4HW(AT91SAM9260_MATRIX_BASE, AT91SAM9260_EBICSA));
+}
diff --git a/sys/arm/at91/at91_smc.h b/sys/arm/at91/at91_smc.h
new file mode 100644
index 0000000..f571c46
--- /dev/null
+++ b/sys/arm/at91/at91_smc.h
@@ -0,0 +1,116 @@
+/*-
+ * Copyright (c) 2014 M. Warner Losh.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/* $FreeBSD$ */
+
+#ifndef ARM_AT91_AT91_SMC_H
+#define ARM_AT91_AT91_SMC_H
+
+/* Registers */
+#define	SMC_SETUP	0x00
+#define SMC_PULSE	0x04
+#define SMC_CYCLE	0x08
+#define	SMC_MODE	0x0C
+
+#define	SMC_CS_OFF(cs)	(0x10 * (cs))
+
+/* Setup */
+#define	SMC_SETUP_NCS_RD_SETUP(x)	((x) << 24)
+#define	SMC_SETUP_NRD_SETUP(x)		((x) << 16)
+#define	SMC_SETUP_NCS_WR_SETUP(x)	((x) << 8)
+#define	SMC_SETUP_NWE_SETUP(x)		(x)
+
+/* Pulse */
+#define	SMC_PULSE_NCS_RD_PULSE(x)	((x) << 24)
+#define	SMC_PULSE_NRD_PULSE(x)		((x) << 16)
+#define	SMC_PULSE_NCS_WR_PULSE(x)	((x) << 8)
+#define	SMC_PULSE_NWE_PULSE(x)		(x)
+
+/* Cycle */
+#define	SMC_CYCLE_NRD_CYCLE(x)		((x) << 16)
+#define	SMC_CYCLE_NWE_CYCLE(x)		(x)
+
+/* Mode */
+#define	SMC_MODE_READ			(1 << 0)
+#define	SMC_MODE_WRITE			(1 << 1)
+#define	SMC_MODE_EXNW_DISABLED		(0 << 4)
+#define	SMC_MODE_EXNW_FROZEN_MODE	(2 << 4)
+#define	SMC_MODE_EXNW_READY_MODE	(3 << 4)
+#define	SMC_MODE_BAT			(1 << 8)
+#define	SMC_MODE_DBW_8BIT		(0 << 12)
+#define	SMC_MODE_DBW_16BIT		(1 << 12)
+#define	SMC_MODE_DBW_32_BIT		(2 << 12)
+#define	SMC_MODE_TDF_CYCLES(x)		((x) << 16)
+#define	SMC_MODE_TDF_MODE		(1 << 20)
+#define	SMC_MODE_PMEN			(1 << 24)
+#define SMC_PS_4BYTE			(0 << 28)
+#define SMC_PS_8BYTE			(1 << 28)
+#define SMC_PS_16BYTE			(2 << 28)
+#define SMC_PS_32BYTE			(3 << 28)
+
+/*
+ * structure to ease init. See the SMC chapter in the datasheet for
+ * the appropriate SoC you are using for details.
+ */
+struct at91_smc_init
+{
+	/* Setup register */
+	uint8_t	ncs_rd_setup;
+	uint8_t nrd_setup;
+	uint8_t ncs_wr_setup;
+	uint8_t nwe_setup;
+
+	/* Pulse register */
+	uint8_t	ncs_rd_pulse;
+	uint8_t nrd_pulse;
+	uint8_t ncs_wr_pulse;
+	uint8_t nwe_pulse;
+
+	/* Cycle register */
+	uint16_t nrd_cycle;
+	uint16_t nwe_cycle;
+
+	/* Mode register */
+	uint8_t mode;		/* Combo of READ/WRITE/EXNW fields */
+	uint8_t bat;
+	uint8_t dwb;
+	uint8_t tdf_cycles;
+	uint8_t tdf_mode;
+	uint8_t pmen;
+	uint8_t ps;
+};
+
+/*
+ * Convenience routine to fill in SMC registers for a given chip select.
+ */
+void at91_smc_setup(int id, int cs, const struct at91_smc_init *smc);
+
+/*
+ * Disable/Enable different External Bus Interfaces (EBI)
+ */
+void at91_ebi_enable(int cs);
+void at91_ebi_disable(int cs);
+
+#endif /* ARM_AT91_AT91_SMC_H */
diff --git a/sys/arm/at91/at91rm9200.c b/sys/arm/at91/at91rm9200.c
index 2c6073c..f2ee450 100644
--- a/sys/arm/at91/at91rm9200.c
+++ b/sys/arm/at91/at91rm9200.c
@@ -88,6 +88,13 @@ static const int at91_irq_prio[32] =
  	0	/* Advanced Interrupt Controller (IRQ6) */
 };
 
+static const uint32_t at91_pio_base[] = {
+	AT91RM92_PIOA_BASE,
+	AT91RM92_PIOB_BASE,
+	AT91RM92_PIOC_BASE,
+	AT91RM92_PIOD_BASE,
+};
+
 #define DEVICE(_name, _id, _unit)		\
 	{					\
 		_name, _unit,			\
@@ -195,6 +202,8 @@ static struct at91_soc_data soc_data = {
 	.soc_clock_init = at91_clock_init,
 	.soc_irq_prio = at91_irq_prio,
 	.soc_children = at91_devs,
+	.soc_pio_base = at91_pio_base,
+	.soc_pio_count = nitems(at91_pio_base),
 };
 
 AT91_SOC(AT91_T_RM9200, &soc_data);
diff --git a/sys/arm/at91/at91sam9260.c b/sys/arm/at91/at91sam9260.c
index 013c9e4..03ad462 100644
--- a/sys/arm/at91/at91sam9260.c
+++ b/sys/arm/at91/at91sam9260.c
@@ -87,6 +87,12 @@ static const int at91_irq_prio[32] =
 	0,	/* Advanced Interrupt Controller IRQ2 */
 };
 
+static const uint32_t at91_pio_base[] = {
+	AT91SAM9260_PIOA_BASE,
+	AT91SAM9260_PIOB_BASE,
+	AT91SAM9260_PIOC_BASE,
+};
+
 #define	DEVICE(_name, _id, _unit)		\
 	{					\
 		_name, _unit,			\
@@ -204,6 +210,8 @@ static struct at91_soc_data soc_data = {
 	.soc_clock_init = at91_clock_init,
 	.soc_irq_prio = at91_irq_prio,
 	.soc_children = at91_devs,
+	.soc_pio_base = at91_pio_base,
+	.soc_pio_count = nitems(at91_pio_base),
 };
 
 AT91_SOC(AT91_T_SAM9260, &soc_data);
diff --git a/sys/arm/at91/at91sam9g20.c b/sys/arm/at91/at91sam9g20.c
index 4d9907c..d4e6347 100644
--- a/sys/arm/at91/at91sam9g20.c
+++ b/sys/arm/at91/at91sam9g20.c
@@ -87,6 +87,12 @@ static const int at91_irq_prio[32] =
 	0,	/* Advanced Interrupt Controller IRQ2 */
 };
 
+static const uint32_t at91_pio_base[] = {
+	AT91SAM9G20_PIOA_BASE,
+	AT91SAM9G20_PIOB_BASE,
+	AT91SAM9G20_PIOC_BASE,
+};
+
 #define DEVICE(_name, _id, _unit)		\
 	{					\
 		_name, _unit,			\
@@ -169,6 +175,8 @@ static struct at91_soc_data soc_data = {
 	.soc_clock_init = at91_clock_init,
 	.soc_irq_prio = at91_irq_prio,
 	.soc_children = at91_devs,
+	.soc_pio_base = at91_pio_base,
+	.soc_pio_count = nitems(at91_pio_base),
 };
 
 AT91_SOC(AT91_T_SAM9G20, &soc_data);
diff --git a/sys/arm/at91/at91sam9g45.c b/sys/arm/at91/at91sam9g45.c
index dedc7ce..c3a26d5 100644
--- a/sys/arm/at91/at91sam9g45.c
+++ b/sys/arm/at91/at91sam9g45.c
@@ -88,6 +88,14 @@ static const int at91_irq_prio[32] =
 	0,	/* Advanced Interrupt Controller IRQ0 */
 };
 
+static const uint32_t at91_pio_base[] = {
+	AT91SAM9G45_PIOA_BASE,
+	AT91SAM9G45_PIOB_BASE,
+	AT91SAM9G45_PIOC_BASE,
+	AT91SAM9G45_PIOD_BASE,
+	AT91SAM9G45_PIOE_BASE,
+};
+
 #define DEVICE(_name, _id, _unit)		\
 	{					\
 		_name, _unit,			\
@@ -155,6 +163,8 @@ static struct at91_soc_data soc_data = {
 	.soc_clock_init = at91_clock_init,
 	.soc_irq_prio = at91_irq_prio,
 	.soc_children = at91_devs,
+	.soc_pio_base = at91_pio_base,
+	.soc_pio_count = nitems(at91_pio_base),
 };
 
 AT91_SOC(AT91_T_SAM9G45, &soc_data);
diff --git a/sys/arm/at91/at91sam9x5.c b/sys/arm/at91/at91sam9x5.c
index dedd135..4e8c3f4 100644
--- a/sys/arm/at91/at91sam9x5.c
+++ b/sys/arm/at91/at91sam9x5.c
@@ -87,6 +87,13 @@ static const int at91_irq_prio[32] =
 	0,	/* Advanced Interrupt Controller (IRQ0) */
 };
 
+static const uint32_t at91_pio_base[] = {
+	AT91SAM9X25_PIOA_BASE,
+	AT91SAM9X25_PIOB_BASE,
+	AT91SAM9X25_PIOC_BASE,
+	AT91SAM9X25_PIOD_BASE,
+};
+
 #define DEVICE(_name, _id, _unit)		\
 	{					\
 		_name, _unit,			\
@@ -172,6 +179,8 @@ static struct at91_soc_data soc_data = {
 	.soc_clock_init = at91_clock_init,
 	.soc_irq_prio = at91_irq_prio,
 	.soc_children = at91_devs,
+	.soc_pio_base = at91_pio_base,
+	.soc_pio_count = nitems(at91_pio_base),
 };
 
 AT91_SOC_SUB(AT91_T_SAM9X5, AT91_ST_SAM9X25, &soc_data);
diff --git a/sys/arm/at91/at91var.h b/sys/arm/at91/at91var.h
index b149465..240eb74 100644
--- a/sys/arm/at91/at91var.h
+++ b/sys/arm/at91/at91var.h
@@ -107,11 +107,13 @@ typedef void (*cpu_reset_t)(void);
 typedef void (*clk_init_t)(void);
 
 struct at91_soc_data {
-	DELAY_t		soc_delay;
-	cpu_reset_t	soc_reset;
-	clk_init_t      soc_clock_init;
-	const int	*soc_irq_prio;
-	const struct cpu_devs *soc_children;
+	DELAY_t		soc_delay;		/* SoC specific delay function */
+	cpu_reset_t	soc_reset;		/* SoC specific reset function */
+	clk_init_t      soc_clock_init;		/* SoC specific clock init function */
+	const int	*soc_irq_prio;		/* SoC specific IRQ priorities */
+	const struct cpu_devs *soc_children;	/* SoC specific children list */
+	const uint32_t  *soc_pio_base;		/* SoC specific PIO base registers */
+	size_t          soc_pio_count;		/* Count of PIO units (not pins) in SoC */
 };
 
 struct at91_soc_info {
diff --git a/sys/arm/at91/files.at91 b/sys/arm/at91/files.at91
index a83aa7a..5533594 100644
--- a/sys/arm/at91/files.at91
+++ b/sys/arm/at91/files.at91
@@ -12,6 +12,7 @@ arm/at91/at91_pit.c		optional	at91sam9
 arm/at91/at91_reset.S		optional	at91sam9
 arm/at91/at91_rst.c		optional	at91sam9
 arm/at91/at91_rtc.c		optional	at91_rtc
+arm/at91/at91_smc.c		standard
 arm/at91/at91_spi.c		optional	at91_spi		\
 	dependency	"spibus_if.h"
 arm/at91/at91_ssc.c		optional	at91_ssc