Author: loos
Date: Thu Jan 23 12:32:30 2014
New Revision: 261078
URL: http://svnweb.freebsd.org/changeset/base/261078
Log:
MFC r256959:
Add the Raspberry Pi BSC (I2C compliant) controller driver.
Reviewed by: rpaulo
MFC r256961:
Enable the build of OFW I2C bus for FDT systems.
MFC r258045:
As all the IIC controllers on system uses the same 'iichb' prefix we cannot
rely only on checking the device unit to indentify the BSC unit we are
attaching to. Make use of the device base address to identify our BSC unit.
MFC r259127:
Bring the RPi I2C driver in line with ti_i2c. Make it treat any slave
address as a 7-bit address.
Approved by: adrian (mentor)
Added:
stable/10/sys/arm/broadcom/bcm2835/bcm2835_bsc.c
- copied, changed from r256959, head/sys/arm/broadcom/bcm2835/bcm2835_bsc.c
stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h
- copied unchanged from r256959,
head/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h
stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h
- copied, changed from r256959,
head/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h
Modified:
stable/10/sys/arm/broadcom/bcm2835/files.bcm2835
stable/10/sys/arm/conf/RPI-B
stable/10/sys/boot/fdt/dts/bcm2835.dtsi
stable/10/sys/conf/files
Directory Properties:
stable/10/ (props changed)
Copied and modified: stable/10/sys/arm/broadcom/bcm2835/bcm2835_bsc.c (from
r256959, head/sys/arm/broadcom/bcm2835/bcm2835_bsc.c)
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_bsc.c Wed Oct 23 12:29:39 2013
(r256959, copy source)
+++ stable/10/sys/arm/broadcom/bcm2835/bcm2835_bsc.c Thu Jan 23 12:32:30
2014 (r261078)
@@ -234,31 +234,13 @@ static int
bcm_bsc_attach(device_t dev)
{
struct bcm_bsc_softc *sc;
+ unsigned long start;
device_t gpio;
- int rid;
-
- if (device_get_unit(dev) > 1) {
- device_printf(dev, "only bsc0 and bsc1 are supported\n");
- return (ENXIO);
- }
+ int i, rid;
sc = device_get_softc(dev);
sc->sc_dev = dev;
- /*
- * Configure the GPIO pins to ALT0 function to enable BSC control
- * over the pins.
- */
- gpio = devclass_get_device(devclass_find("gpio"), 0);
- if (!gpio) {
- device_printf(dev, "cannot find gpio0\n");
- return (ENXIO);
- }
- bcm_gpio_set_alternate(gpio, bcm_bsc_pins[device_get_unit(dev)].sda,
- BCM_GPIO_ALT0);
- bcm_gpio_set_alternate(gpio, bcm_bsc_pins[device_get_unit(dev)].scl,
- BCM_GPIO_ALT0);
-
rid = 0;
sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
@@ -270,6 +252,29 @@ bcm_bsc_attach(device_t dev)
sc->sc_bst = rman_get_bustag(sc->sc_mem_res);
sc->sc_bsh = rman_get_bushandle(sc->sc_mem_res);
+ /* Check the unit we are attaching by its base address. */
+ start = rman_get_start(sc->sc_mem_res);
+ for (i = 0; i < nitems(bcm_bsc_pins); i++) {
+ if (bcm_bsc_pins[i].start == start)
+ break;
+ }
+ if (i == nitems(bcm_bsc_pins)) {
+ device_printf(dev, "only bsc0 and bsc1 are supported\n");
+ return (ENXIO);
+ }
+
+ /*
+ * Configure the GPIO pins to ALT0 function to enable BSC control
+ * over the pins.
+ */
+ gpio = devclass_get_device(devclass_find("gpio"), 0);
+ if (!gpio) {
+ device_printf(dev, "cannot find gpio0\n");
+ return (ENXIO);
+ }
+ bcm_gpio_set_alternate(gpio, bcm_bsc_pins[i].sda, BCM_GPIO_ALT0);
+ bcm_gpio_set_alternate(gpio, bcm_bsc_pins[i].scl, BCM_GPIO_ALT0);
+
rid = 0;
sc->sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE | RF_SHAREABLE);
@@ -399,7 +404,7 @@ bcm_bsc_transfer(device_t dev, struct ii
for (i = 0; i < nmsgs; i++) {
/* Write the slave address. */
- BCM_BSC_WRITE(sc, BCM_BSC_SLAVE, (msgs[i].slave >> 1) & 0x7f);
+ BCM_BSC_WRITE(sc, BCM_BSC_SLAVE, msgs[i].slave);
/* Write the data length. */
BCM_BSC_WRITE(sc, BCM_BSC_DLEN, msgs[i].len);
Copied: stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h (from r256959,
head/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h Thu Jan 23 12:32:30
2014 (r261078, copy of r256959,
head/sys/arm/broadcom/bcm2835/bcm2835_bscreg.h)
@@ -0,0 +1,61 @@
+/*-
+ * Copyright (c) 2012 Oleksandr Tymoshenko <go...@freebsd.org>
+ * Copyright (c) 2013 Luiz Otavio O Souza <l...@freebsd.org>
+ * 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 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 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 _BCM2835_BSCREG_H_
+#define _BCM2835_BSCREG_H_
+
+#define BCM_BSC_CORE_CLK 150000000U
+#define BCM_BSC_CTRL 0x00
+#define BCM_BSC_CTRL_I2CEN (1 << 15)
+#define BCM_BSC_CTRL_INTR (1 << 10)
+#define BCM_BSC_CTRL_INTT (1 << 9)
+#define BCM_BSC_CTRL_INTD (1 << 8)
+#define BCM_BSC_CTRL_ST (1 << 7)
+#define BCM_BSC_CTRL_CLEAR1 (1 << 5)
+#define BCM_BSC_CTRL_CLEAR0 (1 << 4)
+#define BCM_BSC_CTRL_READ (1 << 0)
+#define BCM_BSC_STATUS 0x04
+#define BCM_BSC_STATUS_CLKT (1 << 9)
+#define BCM_BSC_STATUS_ERR (1 << 8)
+#define BCM_BSC_STATUS_RXF (1 << 7)
+#define BCM_BSC_STATUS_TXE (1 << 6)
+#define BCM_BSC_STATUS_RXD (1 << 5)
+#define BCM_BSC_STATUS_TXD (1 << 4)
+#define BCM_BSC_STATUS_RXR (1 << 3)
+#define BCM_BSC_STATUS_TXW (1 << 2)
+#define BCM_BSC_STATUS_DONE (1 << 1)
+#define BCM_BSC_STATUS_TA (1 << 0)
+#define BCM_BSC_DLEN 0x08
+#define BCM_BSC_SLAVE 0x0c
+#define BCM_BSC_DATA 0x10
+#define BCM_BSC_CLOCK 0x14
+#define BCM_BSC_DELAY 0x18
+#define BCM_BSC_CLKT 0x1c
+
+#endif /* _BCM2835_BSCREG_H_ */
Copied and modified: stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h (from
r256959, head/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h)
==============================================================================
--- head/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h Wed Oct 23 12:29:39
2013 (r256959, copy source)
+++ stable/10/sys/arm/broadcom/bcm2835/bcm2835_bscvar.h Thu Jan 23 12:32:30
2014 (r261078)
@@ -33,9 +33,10 @@
struct {
uint32_t sda;
uint32_t scl;
+ unsigned long start;
} bcm_bsc_pins[] = {
- { 0, 1 }, /* BSC0 GPIO pins. */
- { 2, 3 } /* BSC1 GPIO pins. */
+ { 0, 1, 0x20205000 }, /* BSC0 GPIO pins and base address. */
+ { 2, 3, 0x20804000 } /* BSC1 GPIO pins and base address. */
};
struct bcm_bsc_softc {
Modified: stable/10/sys/arm/broadcom/bcm2835/files.bcm2835
==============================================================================
--- stable/10/sys/arm/broadcom/bcm2835/files.bcm2835 Thu Jan 23 12:02:04
2014 (r261077)
+++ stable/10/sys/arm/broadcom/bcm2835/files.bcm2835 Thu Jan 23 12:32:30
2014 (r261078)
@@ -1,5 +1,6 @@
# $FreeBSD$
+arm/broadcom/bcm2835/bcm2835_bsc.c optional bcm2835_bsc
arm/broadcom/bcm2835/bcm2835_dma.c standard
arm/broadcom/bcm2835/bcm2835_fb.c optional sc
arm/broadcom/bcm2835/bcm2835_gpio.c optional gpio
Modified: stable/10/sys/arm/conf/RPI-B
==============================================================================
--- stable/10/sys/arm/conf/RPI-B Thu Jan 23 12:02:04 2014
(r261077)
+++ stable/10/sys/arm/conf/RPI-B Thu Jan 23 12:32:30 2014
(r261078)
@@ -79,6 +79,11 @@ device mmcsd
device gpio
device gpioled
+# I2C
+device iic
+device iicbus
+device bcm2835_bsc
+
options KDB
options DDB #Enable the kernel debugger
options INVARIANTS #Enable calls of extra sanity checking
Modified: stable/10/sys/boot/fdt/dts/bcm2835.dtsi
==============================================================================
--- stable/10/sys/boot/fdt/dts/bcm2835.dtsi Thu Jan 23 12:02:04 2014
(r261077)
+++ stable/10/sys/boot/fdt/dts/bcm2835.dtsi Thu Jan 23 12:32:30 2014
(r261078)
@@ -396,6 +396,22 @@
};
};
+ bsc0 {
+ compatible = "broadcom,bcm2835-bsc",
+ "broadcom,bcm2708-bsc";
+ reg = <0x205000 0x20>;
+ interrupts = <61>;
+ interrupt-parent = <&intc>;
+ };
+
+ bsc1 {
+ compatible = "broadcom,bcm2835-bsc",
+ "broadcom,bcm2708-bsc";
+ reg = <0x804000 0x20>;
+ interrupts = <61>;
+ interrupt-parent = <&intc>;
+ };
+
spi0 {
compatible = "broadcom,bcm2835-spi",
"broadcom,bcm2708-spi";
Modified: stable/10/sys/conf/files
==============================================================================
--- stable/10/sys/conf/files Thu Jan 23 12:02:04 2014 (r261077)
+++ stable/10/sys/conf/files Thu Jan 23 12:32:30 2014 (r261078)
@@ -1914,6 +1914,7 @@ dev/ofw/ofw_bus_if.m optional fdt
dev/ofw/ofw_bus_subr.c optional fdt
dev/ofw/ofw_fdt.c optional fdt
dev/ofw/ofw_if.m optional fdt
+dev/ofw/ofw_iicbus.c optional fdt iicbus
dev/ofw/openfirm.c optional fdt
dev/ofw/openfirmio.c optional fdt
dev/patm/if_patm.c optional patm pci
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