[src/trunk]: src/sys/arch/arm/broadcom Add bcm2835_bscvar.h

[jmcneill <jmcneill%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/e037f6de6d9c
branches:  trunk
changeset: 746427:e037f6de6d9c
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Tue Mar 31 14:39:44 2020 +0000

description:
Add bcm2835_bscvar.h

diffstat:

 sys/arch/arm/broadcom/bcm2835_bscvar.h |  100 +++++++++++++++++++++++++++++++++
 1 files changed, 100 insertions(+), 0 deletions(-)

diffs (104 lines):

diff -r 13a5b4c6682a -r e037f6de6d9c sys/arch/arm/broadcom/bcm2835_bscvar.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/broadcom/bcm2835_bscvar.h    Tue Mar 31 14:39:44 2020 +0000
@@ -0,0 +1,100 @@
+/*     $NetBSD: bcm2835_bscvar.h,v 1.1 2020/03/31 14:39:44 jmcneill Exp $      */
+
+/*
+ * Copyright (c) 2019 Jason R. Thorpe
+ * Copyright (c) 2012 Jonathan A. Kollasch
+ * 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 THE COPYRIGHT HOLDERS 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 THE COPYRIGHT HOLDER 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.
+ */
+
+#ifndef _BCM2835_BSCVAR_H
+#define _BCM2835_BSCVAR_H
+
+#include <dev/i2c/i2cvar.h>
+
+typedef enum {
+       BSC_EXEC_STATE_IDLE             = 0,
+       BSC_EXEC_STATE_SEND_ADDR        = 1,
+       BSC_EXEC_STATE_SEND_CMD         = 2,
+       BSC_EXEC_STATE_SEND_DATA        = 3,
+       BSC_EXEC_STATE_RECV_DATA        = 4,
+       BSC_EXEC_STATE_DONE             = 5,
+       BSC_EXEC_STATE_ERROR            = 6,
+} bsc_exec_state_t;
+
+#define        BSC_EXEC_STATE_SENDING(sc)      \
+       ((sc)->sc_exec_state >= BSC_EXEC_STATE_SEND_ADDR && \
+       (sc)->sc_exec_state <= BSC_EXEC_STATE_SEND_DATA)
+
+#define        BSC_EXEC_STATE_RECEIVING(sc)    \
+       ((sc)->sc_exec_state == BSC_EXEC_STATE_RECV_DATA)
+
+struct bsciic_softc {
+       device_t sc_dev;
+       bus_space_tag_t sc_iot;
+       bus_space_handle_t sc_ioh;
+       struct i2c_controller sc_i2c;
+       void *sc_inth;
+
+       struct clk *sc_clk;
+       u_int sc_frequency;
+       u_int sc_clkrate;
+
+       kmutex_t sc_intr_lock;
+       kcondvar_t sc_intr_wait;
+
+       struct {
+               i2c_op_t op;
+               i2c_addr_t addr;
+               const void *cmdbuf;
+               size_t cmdlen;
+               void *databuf;
+               size_t datalen;
+               int flags;
+       } sc_exec;
+
+       /*
+        * Everything below here protected by the i2c controller lock
+        * /and/ sc_intr_lock (if we're using interrupts).
+        */
+
+       bsc_exec_state_t sc_exec_state;
+
+       uint8_t *sc_buf;
+       size_t sc_bufpos;
+       size_t sc_buflen;
+
+       uint32_t sc_c_bits;
+       bool sc_expecting_interrupt;
+};
+
+void bsciic_attach(struct bsciic_softc *);
+
+int  bsciic_acquire_bus(void *, int);
+void bsciic_release_bus(void *, int);
+int  bsciic_exec(void *, i2c_op_t, i2c_addr_t, const void *, size_t,
+                void *, size_t, int);
+
+int bsciic_intr(void *);
+
+#endif /* !_BCM2835_BSCVAR_H */