Source-Changes-HG archive
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Old Index]
[src/trunk]: src/sys/arch Add P2WI/RSB driver, based on awin_p2wi.c.
details: https://anonhg.NetBSD.org/src/rev/681a5544d283
branches: trunk
changeset: 825180:681a5544d283
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Sun Jul 02 18:06:45 2017 +0000
description:
Add P2WI/RSB driver, based on awin_p2wi.c.
diffstat:
sys/arch/arm/sunxi/files.sunxi | 7 +-
sys/arch/arm/sunxi/sunxi_rsb.c | 479 +++++++++++++++++++++++++++++++++++++++++
sys/arch/arm/sunxi/sunxi_rsb.h | 85 +++++++
sys/arch/evbarm/conf/SUNXI | 5 +-
4 files changed, 573 insertions(+), 3 deletions(-)
diffs (truncated from 613 to 300 lines):
diff -r 952487a74073 -r 681a5544d283 sys/arch/arm/sunxi/files.sunxi
--- a/sys/arch/arm/sunxi/files.sunxi Sun Jul 02 17:13:07 2017 +0000
+++ b/sys/arch/arm/sunxi/files.sunxi Sun Jul 02 18:06:45 2017 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: files.sunxi,v 1.8 2017/07/02 13:36:46 jmcneill Exp $
+# $NetBSD: files.sunxi,v 1.9 2017/07/02 18:06:45 jmcneill Exp $
#
# Configuration info for Allwinner sunxi family SoCs
#
@@ -70,6 +70,11 @@
attach sunxitwi at fdt with sunxi_twi
file arch/arm/sunxi/sunxi_twi.c sunxi_twi
+# P2WI/RSB
+device sunxirsb: i2cbus, i2cexec
+attach sunxirsb at fdt with sunxi_rsb
+file arch/arm/sunxi/sunxi_rsb.c sunxi_rsb
+
# RTC
device sunxirtc
attach sunxirtc at fdt with sunxi_rtc
diff -r 952487a74073 -r 681a5544d283 sys/arch/arm/sunxi/sunxi_rsb.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/arm/sunxi/sunxi_rsb.c Sun Jul 02 18:06:45 2017 +0000
@@ -0,0 +1,479 @@
+/* $NetBSD: sunxi_rsb.c,v 1.1 2017/07/02 18:06:45 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2014-2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * 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 AUTHOR ``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 AUTHOR 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>
+__KERNEL_RCSID(0, "$NetBSD: sunxi_rsb.c,v 1.1 2017/07/02 18:06:45 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/intr.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/mutex.h>
+#include <sys/condvar.h>
+
+#include <dev/i2c/i2cvar.h>
+
+#include <dev/fdt/fdtvar.h>
+
+#include <arm/sunxi/sunxi_rsb.h>
+
+enum sunxi_rsb_type {
+ SUNXI_P2WI,
+ SUNXI_RSB,
+};
+
+static const struct of_compat_data compat_data[] = {
+ { "allwinner,sun6i-a31-p2wi", SUNXI_P2WI },
+ { "allwinner,sun8i-a23-rsb", SUNXI_RSB },
+ { NULL }
+};
+
+#define RSB_ADDR_PMIC_PRIMARY 0x3a3
+#define RSB_ADDR_PMIC_SECONDARY 0x745
+#define RSB_ADDR_PERIPH_IC 0xe89
+
+/*
+ * Device address to Run-time address mappings.
+ *
+ * Run-time address (RTA) is an 8-bit value used to address the device during
+ * a read or write transaction. The following are valid RTAs:
+ * 0x17 0x2d 0x3a 0x4e 0x59 0x63 0x74 0x8b 0x9c 0xa6 0xb1 0xc5 0xd2 0xe8 0xff
+ *
+ * Allwinner uses RTA 0x2d for the primary PMIC, 0x3a for the secondary PMIC,
+ * and 0x4e for the peripheral IC (where applicable).
+ */
+static const struct {
+ uint16_t addr;
+ uint8_t rta;
+} rsb_rtamap[] = {
+ { .addr = RSB_ADDR_PMIC_PRIMARY, .rta = 0x2d },
+ { .addr = RSB_ADDR_PMIC_SECONDARY, .rta = 0x3a },
+ { .addr = RSB_ADDR_PERIPH_IC, .rta = 0x4e },
+ { .addr = 0, .rta = 0 }
+};
+
+struct sunxi_rsb_softc {
+ device_t sc_dev;
+ bus_space_tag_t sc_bst;
+ bus_space_handle_t sc_bsh;
+ enum sunxi_rsb_type sc_type;
+ struct i2c_controller sc_ic;
+ kmutex_t sc_lock;
+ kcondvar_t sc_cv;
+ device_t sc_i2cdev;
+ void *sc_ih;
+ uint32_t sc_stat;
+
+ uint16_t sc_rsb_last_da;
+};
+
+#define RSB_READ(sc, reg) \
+ bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg))
+#define RSB_WRITE(sc, reg, val) \
+ bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg), (val))
+
+static int sunxi_rsb_acquire_bus(void *, int);
+static void sunxi_rsb_release_bus(void *, int);
+static int sunxi_rsb_exec(void *, i2c_op_t, i2c_addr_t, const void *,
+ size_t, void *, size_t, int);
+
+static int sunxi_rsb_intr(void *);
+static int sunxi_rsb_wait(struct sunxi_rsb_softc *, int);
+static int sunxi_rsb_rsb_config(struct sunxi_rsb_softc *,
+ uint8_t, i2c_addr_t, int);
+
+static int sunxi_rsb_match(device_t, cfdata_t, void *);
+static void sunxi_rsb_attach(device_t, device_t, void *);
+
+static i2c_tag_t
+sunxi_rsb_get_tag(device_t dev)
+{
+ struct sunxi_rsb_softc * const sc = device_private(dev);
+
+ return &sc->sc_ic;
+}
+
+static const struct fdtbus_i2c_controller_func sunxi_rsb_funcs = {
+ .get_tag = sunxi_rsb_get_tag,
+};
+
+CFATTACH_DECL_NEW(sunxi_rsb, sizeof(struct sunxi_rsb_softc),
+ sunxi_rsb_match, sunxi_rsb_attach, NULL, NULL);
+
+static int
+sunxi_rsb_match(device_t parent, cfdata_t cf, void *aux)
+{
+ struct fdt_attach_args * const faa = aux;
+
+ return of_match_compat_data(faa->faa_phandle, compat_data);
+}
+
+static void
+sunxi_rsb_attach(device_t parent, device_t self, void *aux)
+{
+ struct sunxi_rsb_softc * const sc = device_private(self);
+ struct fdt_attach_args * const faa = aux;
+ const int phandle = faa->faa_phandle;
+ struct i2cbus_attach_args iba;
+ prop_dictionary_t devs;
+ uint32_t address_cells;
+ struct fdtbus_reset *rst;
+ struct clk *clk;
+ char intrstr[128];
+ bus_addr_t addr;
+ bus_size_t size;
+
+ if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
+ aprint_error(": couldn't get registers\n");
+ return;
+ }
+
+ if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
+ aprint_error(": couldn't decode interrupt\n");
+ return;
+ }
+
+ if ((clk = fdtbus_clock_get_index(phandle, 0)) != NULL)
+ if (clk_enable(clk) != 0) {
+ aprint_error(": couldn't enable clock\n");
+ return;
+ }
+ if ((rst = fdtbus_reset_get_index(phandle, 0)) != NULL)
+ if (fdtbus_reset_deassert(rst) != 0) {
+ aprint_error(": couldn't de-assert reset\n");
+ return;
+ }
+
+ sc->sc_dev = self;
+ sc->sc_type = of_search_compatible(phandle, compat_data)->data;
+ sc->sc_bst = faa->faa_bst;
+ if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
+ aprint_error(": couldn't map registers\n");
+ return;
+ }
+
+ mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SCHED);
+ cv_init(&sc->sc_cv, "awinp2wi");
+
+ aprint_naive("\n");
+ aprint_normal(": %s\n", sc->sc_type == SUNXI_P2WI ? "P2WI" : "RSB");
+
+ sc->sc_ih = fdtbus_intr_establish(phandle, 0, IPL_VM, 0,
+ sunxi_rsb_intr, sc);
+ if (sc->sc_ih == NULL) {
+ aprint_error_dev(self, "couldn't establish interrupt on %s\n",
+ intrstr);
+ return;
+ }
+ aprint_normal_dev(self, "interrupting on %s\n", intrstr);
+
+ /* Enable interrupts */
+ RSB_WRITE(sc, RSB_INTE_REG,
+ RSB_INTE_LOAD_BSY_ENB |
+ RSB_INTE_TRANS_ERR_ENB |
+ RSB_INTE_TRANS_OVER_ENB);
+ RSB_WRITE(sc, RSB_CTRL_REG,
+ RSB_CTRL_GLOBAL_INT_ENB);
+
+ sc->sc_ic.ic_cookie = sc;
+ sc->sc_ic.ic_acquire_bus = sunxi_rsb_acquire_bus;
+ sc->sc_ic.ic_release_bus = sunxi_rsb_release_bus;
+ sc->sc_ic.ic_exec = sunxi_rsb_exec;
+
+ fdtbus_register_i2c_controller(self, phandle, &sunxi_rsb_funcs);
+
+ devs = prop_dictionary_create();
+ if (of_getprop_uint32(phandle, "#address-cells", &address_cells))
+ address_cells = 1;
+
+ of_enter_i2c_devs(devs, phandle, address_cells * 4, 0);
+
+ memset(&iba, 0, sizeof(iba));
+ iba.iba_tag = &sc->sc_ic;
+ iba.iba_child_devices = prop_dictionary_get(devs, "i2c-child-devices");
+ if (iba.iba_child_devices)
+ prop_object_retain(iba.iba_child_devices);
+ else
+ iba.iba_child_devices = prop_array_create();
+ prop_object_release(devs);
+
+ sc->sc_i2cdev = config_found_ia(self, "i2cbus", &iba, iicbus_print);
+}
+
+static int
+sunxi_rsb_intr(void *priv)
+{
+ struct sunxi_rsb_softc *sc = priv;
+ uint32_t stat;
+
+ stat = RSB_READ(sc, RSB_STAT_REG);
+ if ((stat & RSB_STAT_MASK) == 0)
+ return 0;
+
+ RSB_WRITE(sc, RSB_STAT_REG, stat & RSB_STAT_MASK);
+
+ mutex_enter(&sc->sc_lock);
+ sc->sc_stat |= stat;
+ cv_broadcast(&sc->sc_cv);
+ mutex_exit(&sc->sc_lock);
+
+ return 1;
+}
+
+static int
+sunxi_rsb_wait(struct sunxi_rsb_softc *sc, int flags)
+{
+ int error = 0, retry;
+
+ /* Wait up to 5 seconds for a transfer to complete */
+ sc->sc_stat = 0;
+ for (retry = (flags & I2C_F_POLL) ? 100 : 5; retry > 0; retry--) {
+ if (flags & I2C_F_POLL) {
+ sc->sc_stat |= RSB_READ(sc, RSB_STAT_REG);
+ } else {
+ error = cv_timedwait(&sc->sc_cv, &sc->sc_lock, hz);
+ if (error && error != EWOULDBLOCK) {
+ break;
+ }
+ }
+ if (sc->sc_stat & RSB_STAT_MASK) {
+ break;
+ }
+ if (flags & I2C_F_POLL) {
+ delay(10000);
+ }
+ }
+ if (retry == 0)
+ error = EAGAIN;
+
Home |
Main Index |
Thread Index |
Old Index