svn commit: r268973 - in head/sys/arm/freescale: imx vybrid
Ruslan Bukin
br at FreeBSD.org
Tue Jul 22 03:59:16 UTC 2014
Author: br
Date: Tue Jul 22 03:59:14 2014
New Revision: 268973
URL: http://svnweb.freebsd.org/changeset/base/268973
Log:
Rename i.MX I2C driver file.
Added:
head/sys/arm/freescale/imx/imx_i2c.c
- copied unchanged from r268972, head/sys/arm/freescale/imx/i2c.c
Deleted:
head/sys/arm/freescale/imx/i2c.c
Modified:
head/sys/arm/freescale/imx/files.imx51
head/sys/arm/freescale/imx/files.imx53
head/sys/arm/freescale/imx/files.imx6
head/sys/arm/freescale/vybrid/vf_i2c.c
Modified: head/sys/arm/freescale/imx/files.imx51
==============================================================================
--- head/sys/arm/freescale/imx/files.imx51 Tue Jul 22 03:14:37 2014 (r268972)
+++ head/sys/arm/freescale/imx/files.imx51 Tue Jul 22 03:59:14 2014 (r268973)
@@ -44,7 +44,7 @@ dev/usb/controller/ehci_imx.c optional
arm/freescale/imx/imx_wdog.c optional imxwdt
# i2c
-arm/freescale/imx/i2c.c optional fsliic
+arm/freescale/imx/imx_i2c.c optional fsliic
# IPU - Image Processing Unit (frame buffer also)
arm/freescale/imx/imx51_ipuv3.c optional sc
Modified: head/sys/arm/freescale/imx/files.imx53
==============================================================================
--- head/sys/arm/freescale/imx/files.imx53 Tue Jul 22 03:14:37 2014 (r268972)
+++ head/sys/arm/freescale/imx/files.imx53 Tue Jul 22 03:59:14 2014 (r268973)
@@ -47,7 +47,7 @@ dev/usb/controller/ehci_imx.c optional
arm/freescale/imx/imx_wdog.c optional imxwdt
# i2c
-arm/freescale/imx/i2c.c optional fsliic
+arm/freescale/imx/imx_i2c.c optional fsliic
# IPU - Image Processing Unit (frame buffer also)
arm/freescale/imx/imx51_ipuv3.c optional sc
Modified: head/sys/arm/freescale/imx/files.imx6
==============================================================================
--- head/sys/arm/freescale/imx/files.imx6 Tue Jul 22 03:14:37 2014 (r268972)
+++ head/sys/arm/freescale/imx/files.imx6 Tue Jul 22 03:59:14 2014 (r268973)
@@ -52,5 +52,5 @@ arm/freescale/imx/imx6_usbphy.c optiona
#
#arm/freescale/imx/imx51_iomux.c optional iomux
#dev/ata/chipsets/ata-fsl.c optional imxata
-#arm/freescale/imx/i2c.c optional fsliic
+#arm/freescale/imx/imx_i2c.c optional fsliic
#arm/freescale/imx/imx51_ipuv3.c optional sc
Copied: head/sys/arm/freescale/imx/imx_i2c.c (from r268972, head/sys/arm/freescale/imx/i2c.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/freescale/imx/imx_i2c.c Tue Jul 22 03:59:14 2014 (r268973, copy of r268972, head/sys/arm/freescale/imx/i2c.c)
@@ -0,0 +1,495 @@
+/*-
+ * Copyright (C) 2008-2009 Semihalf, Michal Hajduk
+ * Copyright (c) 2012, 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Oleksandr Rybalko
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/rman.h>
+
+#include <sys/lock.h>
+#include <sys/mutex.h>
+
+#include <dev/iicbus/iiconf.h>
+#include <dev/iicbus/iicbus.h>
+#include "iicbus_if.h"
+
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+
+#define I2C_ADDR_REG 0x00 /* I2C slave address register */
+#define I2C_FDR_REG 0x04 /* I2C frequency divider register */
+#define I2C_CONTROL_REG 0x08 /* I2C control register */
+#define I2C_STATUS_REG 0x0C /* I2C status register */
+#define I2C_DATA_REG 0x10 /* I2C data register */
+#define I2C_DFSRR_REG 0x14 /* I2C Digital Filter Sampling rate */
+
+#define I2CCR_MEN (1 << 7) /* Module enable */
+#define I2CCR_MSTA (1 << 5) /* Master/slave mode */
+#define I2CCR_MTX (1 << 4) /* Transmit/receive mode */
+#define I2CCR_TXAK (1 << 3) /* Transfer acknowledge */
+#define I2CCR_RSTA (1 << 2) /* Repeated START */
+
+#define I2CSR_MCF (1 << 7) /* Data transfer */
+#define I2CSR_MASS (1 << 6) /* Addressed as a slave */
+#define I2CSR_MBB (1 << 5) /* Bus busy */
+#define I2CSR_MAL (1 << 4) /* Arbitration lost */
+#define I2CSR_SRW (1 << 2) /* Slave read/write */
+#define I2CSR_MIF (1 << 1) /* Module interrupt */
+#define I2CSR_RXAK (1 << 0) /* Received acknowledge */
+
+#define I2C_BAUD_RATE_FAST 0x31
+#define I2C_BAUD_RATE_DEF 0x3F
+#define I2C_DFSSR_DIV 0x10
+
+#ifdef DEBUG
+#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
+ printf(fmt,##args); } while (0)
+#else
+#define debugf(fmt, args...)
+#endif
+
+struct i2c_softc {
+ device_t dev;
+ device_t iicbus;
+ struct resource *res;
+ struct mtx mutex;
+ int rid;
+ bus_space_handle_t bsh;
+ bus_space_tag_t bst;
+};
+
+static phandle_t i2c_get_node(device_t, device_t);
+static int i2c_probe(device_t);
+static int i2c_attach(device_t);
+
+static int i2c_repeated_start(device_t, u_char, int);
+static int i2c_start(device_t, u_char, int);
+static int i2c_stop(device_t);
+static int i2c_reset(device_t, u_char, u_char, u_char *);
+static int i2c_read(device_t, char *, int, int *, int, int);
+static int i2c_write(device_t, const char *, int, int *, int);
+
+static device_method_t i2c_methods[] = {
+ DEVMETHOD(device_probe, i2c_probe),
+ DEVMETHOD(device_attach, i2c_attach),
+
+ /* OFW methods */
+ DEVMETHOD(ofw_bus_get_node, i2c_get_node),
+
+ DEVMETHOD(iicbus_callback, iicbus_null_callback),
+ DEVMETHOD(iicbus_repeated_start, i2c_repeated_start),
+ DEVMETHOD(iicbus_start, i2c_start),
+ DEVMETHOD(iicbus_stop, i2c_stop),
+ DEVMETHOD(iicbus_reset, i2c_reset),
+ DEVMETHOD(iicbus_read, i2c_read),
+ DEVMETHOD(iicbus_write, i2c_write),
+ DEVMETHOD(iicbus_transfer, iicbus_transfer_gen),
+
+ { 0, 0 }
+};
+
+static driver_t i2c_driver = {
+ "iichb",
+ i2c_methods,
+ sizeof(struct i2c_softc),
+};
+static devclass_t i2c_devclass;
+
+DRIVER_MODULE(i2c, simplebus, i2c_driver, i2c_devclass, 0, 0);
+DRIVER_MODULE(iicbus, i2c, iicbus_driver, iicbus_devclass, 0, 0);
+
+static phandle_t
+i2c_get_node(device_t bus, device_t dev)
+{
+ /*
+ * Share controller node with iicbus device
+ */
+ return ofw_bus_get_node(bus);
+}
+
+static __inline void
+i2c_write_reg(struct i2c_softc *sc, bus_size_t off, uint8_t val)
+{
+
+ bus_space_write_1(sc->bst, sc->bsh, off, val);
+}
+
+static __inline uint8_t
+i2c_read_reg(struct i2c_softc *sc, bus_size_t off)
+{
+
+ return (bus_space_read_1(sc->bst, sc->bsh, off));
+}
+
+static __inline void
+i2c_flag_set(struct i2c_softc *sc, bus_size_t off, uint8_t mask)
+{
+ uint8_t status;
+
+ status = i2c_read_reg(sc, off);
+ status |= mask;
+ i2c_write_reg(sc, off, status);
+}
+
+/* Wait for transfer interrupt flag */
+static int
+wait_for_iif(struct i2c_softc *sc)
+{
+ int retry;
+
+ retry = 1000;
+ while (retry --) {
+ if (i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MIF)
+ return (IIC_NOERR);
+ DELAY(10);
+ }
+
+ return (IIC_ETIMEOUT);
+}
+
+/* Wait for free bus */
+static int
+wait_for_nibb(struct i2c_softc *sc)
+{
+ int retry;
+
+ retry = 1000;
+ while (retry --) {
+ if ((i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) == 0)
+ return (IIC_NOERR);
+ DELAY(10);
+ }
+
+ return (IIC_ETIMEOUT);
+}
+
+/* Wait for transfer complete+interrupt flag */
+static int
+wait_for_icf(struct i2c_softc *sc)
+{
+ int retry;
+
+ retry = 1000;
+ while (retry --) {
+
+ if ((i2c_read_reg(sc, I2C_STATUS_REG) &
+ (I2CSR_MCF|I2CSR_MIF)) == (I2CSR_MCF|I2CSR_MIF))
+ return (IIC_NOERR);
+ DELAY(10);
+ }
+
+ return (IIC_ETIMEOUT);
+}
+
+static int
+i2c_probe(device_t dev)
+{
+ struct i2c_softc *sc;
+
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (!ofw_bus_is_compatible(dev, "fsl,imx-i2c"))
+ return (ENXIO);
+
+ sc = device_get_softc(dev);
+ sc->rid = 0;
+
+ sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
+ RF_ACTIVE);
+ if (sc->res == NULL) {
+ device_printf(dev, "could not allocate resources\n");
+ return (ENXIO);
+ }
+
+ sc->bst = rman_get_bustag(sc->res);
+ sc->bsh = rman_get_bushandle(sc->res);
+
+ /* Enable I2C */
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN);
+ bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
+ device_set_desc(dev, "I2C bus controller");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+i2c_attach(device_t dev)
+{
+ struct i2c_softc *sc;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+ sc->rid = 0;
+
+ mtx_init(&sc->mutex, device_get_nameunit(dev), "I2C", MTX_DEF);
+
+ sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
+ RF_ACTIVE);
+ if (sc->res == NULL) {
+ device_printf(dev, "could not allocate resources");
+ mtx_destroy(&sc->mutex);
+ return (ENXIO);
+ }
+
+ sc->bst = rman_get_bustag(sc->res);
+ sc->bsh = rman_get_bushandle(sc->res);
+
+ sc->iicbus = device_add_child(dev, "iicbus", -1);
+ if (sc->iicbus == NULL) {
+ device_printf(dev, "could not add iicbus child");
+ mtx_destroy(&sc->mutex);
+ return (ENXIO);
+ }
+
+ bus_generic_attach(dev);
+ return (IIC_NOERR);
+}
+
+static int
+i2c_repeated_start(device_t dev, u_char slave, int timeout)
+{
+ struct i2c_softc *sc;
+ int error;
+
+ sc = device_get_softc(dev);
+
+ mtx_lock(&sc->mutex);
+
+ i2c_write_reg(sc, I2C_ADDR_REG, slave);
+ if ((i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) == 0) {
+ mtx_unlock(&sc->mutex);
+ return (IIC_EBUSBSY);
+ }
+
+ /* Set repeated start condition */
+ DELAY(10);
+ i2c_flag_set(sc, I2C_CONTROL_REG, I2CCR_RSTA);
+ DELAY(10);
+ /* Clear status */
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ /* Write target address - LSB is R/W bit */
+ i2c_write_reg(sc, I2C_DATA_REG, slave);
+
+ error = wait_for_iif(sc);
+
+ /* Clear status */
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+
+ mtx_unlock(&sc->mutex);
+
+ if (error)
+ return (error);
+
+ return (IIC_NOERR);
+}
+
+static int
+i2c_start(device_t dev, u_char slave, int timeout)
+{
+ struct i2c_softc *sc;
+ int error;
+
+ sc = device_get_softc(dev);
+
+ mtx_lock(&sc->mutex);
+ i2c_write_reg(sc, I2C_ADDR_REG, slave);
+ if (i2c_read_reg(sc, I2C_STATUS_REG) & I2CSR_MBB) {
+ mtx_unlock(&sc->mutex);
+ return (IIC_EBUSBSY);
+ }
+
+ /* Set start condition */
+ i2c_write_reg(sc, I2C_CONTROL_REG,
+ I2CCR_MEN | I2CCR_MSTA | I2CCR_TXAK);
+ DELAY(100);
+ i2c_write_reg(sc, I2C_CONTROL_REG,
+ I2CCR_MEN | I2CCR_MSTA | I2CCR_MTX | I2CCR_TXAK);
+ /* Clear status */
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ /* Write target address - LSB is R/W bit */
+ i2c_write_reg(sc, I2C_DATA_REG, slave);
+
+ error = wait_for_iif(sc);
+
+ mtx_unlock(&sc->mutex);
+ if (error)
+ return (error);
+
+ return (IIC_NOERR);
+}
+
+
+static int
+i2c_stop(device_t dev)
+{
+ struct i2c_softc *sc;
+
+ sc = device_get_softc(dev);
+ mtx_lock(&sc->mutex);
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN | I2CCR_TXAK);
+ DELAY(100);
+ /* Reset controller if bus still busy after STOP */
+ if (wait_for_nibb(sc) == IIC_ETIMEOUT) {
+ i2c_write_reg(sc, I2C_CONTROL_REG, 0);
+ DELAY(1000);
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN | I2CCR_TXAK);
+
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ }
+ mtx_unlock(&sc->mutex);
+
+ return (IIC_NOERR);
+}
+
+static int
+i2c_reset(device_t dev, u_char speed, u_char addr, u_char *oldadr)
+{
+ struct i2c_softc *sc;
+ uint8_t baud_rate;
+
+ sc = device_get_softc(dev);
+
+ switch (speed) {
+ case IIC_FAST:
+ baud_rate = I2C_BAUD_RATE_FAST;
+ break;
+ case IIC_SLOW:
+ case IIC_UNKNOWN:
+ case IIC_FASTEST:
+ default:
+ baud_rate = I2C_BAUD_RATE_DEF;
+ break;
+ }
+
+ mtx_lock(&sc->mutex);
+ i2c_write_reg(sc, I2C_CONTROL_REG, 0x0);
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ DELAY(1000);
+
+ i2c_write_reg(sc, I2C_FDR_REG, 20);
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN);
+ DELAY(1000);
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ mtx_unlock(&sc->mutex);
+
+ return (IIC_NOERR);
+}
+
+static int
+i2c_read(device_t dev, char *buf, int len, int *read, int last, int delay)
+{
+ struct i2c_softc *sc;
+ int error, reg;
+
+ sc = device_get_softc(dev);
+ *read = 0;
+
+ mtx_lock(&sc->mutex);
+
+ if (len) {
+ if (len == 1)
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN |
+ I2CCR_MSTA | I2CCR_TXAK);
+
+ else
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN |
+ I2CCR_MSTA);
+
+ /* dummy read */
+ i2c_read_reg(sc, I2C_DATA_REG);
+ DELAY(1000);
+ }
+
+ while (*read < len) {
+ error = wait_for_icf(sc);
+ if (error) {
+ mtx_unlock(&sc->mutex);
+ return (error);
+ }
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ if ((*read == len - 2) && last) {
+ /* NO ACK on last byte */
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN |
+ I2CCR_MSTA | I2CCR_TXAK);
+ }
+
+ if ((*read == len - 1) && last) {
+ /* Transfer done, remove master bit */
+ i2c_write_reg(sc, I2C_CONTROL_REG, I2CCR_MEN |
+ I2CCR_TXAK);
+ }
+
+ reg = i2c_read_reg(sc, I2C_DATA_REG);
+ *buf++ = reg;
+ (*read)++;
+ }
+ mtx_unlock(&sc->mutex);
+
+ return (IIC_NOERR);
+}
+
+static int
+i2c_write(device_t dev, const char *buf, int len, int *sent, int timeout)
+{
+ struct i2c_softc *sc;
+ int error;
+
+ sc = device_get_softc(dev);
+ *sent = 0;
+
+ mtx_lock(&sc->mutex);
+ while (*sent < len) {
+ i2c_write_reg(sc, I2C_STATUS_REG, 0x0);
+ i2c_write_reg(sc, I2C_DATA_REG, *buf++);
+
+ error = wait_for_iif(sc);
+ if (error) {
+ mtx_unlock(&sc->mutex);
+ return (error);
+ }
+
+ (*sent)++;
+ }
+ mtx_unlock(&sc->mutex);
+
+ return (IIC_NOERR);
+}
Modified: head/sys/arm/freescale/vybrid/vf_i2c.c
==============================================================================
--- head/sys/arm/freescale/vybrid/vf_i2c.c Tue Jul 22 03:14:37 2014 (r268972)
+++ head/sys/arm/freescale/vybrid/vf_i2c.c Tue Jul 22 03:59:14 2014 (r268973)
@@ -30,7 +30,7 @@
*/
/*
- * This driver is based on the I2C driver for IMX (imx/i2c.c).
+ * This driver is based on the I2C driver for i.MX
*/
#include <sys/cdefs.h>
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