Author: br
Date: Sun Mar 30 15:22:36 2014
New Revision: 263936
URL: http://svnweb.freebsd.org/changeset/base/263936

Log:
  Add support for keyboard used in Samsung Chromebook (ARM machine)
  
  Support covers device drivers for:
  - Interrupt Combiner
  - gpio/pad, External Interrupts Controller (pad)
  - I2C Interface
  - Chrome Embedded Controller
  - Chrome Keyboard
  
  Also:
  - Use new gpio dev class in EHCI driver
  - Expand device tree information

Added:
  head/sys/arm/conf/CHROMEBOOK.hints   (contents, props changed)
  head/sys/arm/samsung/exynos/chrome_ec.c   (contents, props changed)
  head/sys/arm/samsung/exynos/chrome_ec.h   (contents, props changed)
  head/sys/arm/samsung/exynos/chrome_kb.c   (contents, props changed)
  head/sys/arm/samsung/exynos/chrome_kb.h   (contents, props changed)
  head/sys/arm/samsung/exynos/exynos5_combiner.c   (contents, props changed)
  head/sys/arm/samsung/exynos/exynos5_combiner.h   (contents, props changed)
  head/sys/arm/samsung/exynos/exynos5_i2c.c   (contents, props changed)
  head/sys/arm/samsung/exynos/exynos5_pad.c   (contents, props changed)
  head/sys/arm/samsung/exynos/exynos5_pad.h   (contents, props changed)
Modified:
  head/sys/arm/conf/CHROMEBOOK
  head/sys/arm/samsung/exynos/exynos5_ehci.c
  head/sys/arm/samsung/exynos/files.exynos5
  head/sys/boot/fdt/dts/arm/exynos5250-arndale.dts
  head/sys/boot/fdt/dts/arm/exynos5250-chromebook.dts
  head/sys/boot/fdt/dts/arm/exynos5250.dtsi

Modified: head/sys/arm/conf/CHROMEBOOK
==============================================================================
--- head/sys/arm/conf/CHROMEBOOK        Sun Mar 30 14:57:00 2014        
(r263935)
+++ head/sys/arm/conf/CHROMEBOOK        Sun Mar 30 15:22:36 2014        
(r263936)
@@ -20,6 +20,11 @@
 include                "EXYNOS5250.common"
 ident          CHROMEBOOK
 
+hints          "CHROMEBOOK.hints"
+
+device         chrome_ec       # Chrome Embedded Controller
+device         chrome_kb       # Chrome Keyboard
+
 # Framebuffer
 device         vt
 device         kbdmux

Added: head/sys/arm/conf/CHROMEBOOK.hints
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/sys/arm/conf/CHROMEBOOK.hints  Sun Mar 30 15:22:36 2014        
(r263936)
@@ -0,0 +1,5 @@
+# $FreeBSD$
+
+# Chrome Embedded Controller
+hint.chrome_ec.0.at="iicbus0"
+hint.chrome_ec.0.addr=0x1e

Added: head/sys/arm/samsung/exynos/chrome_ec.c
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/sys/arm/samsung/exynos/chrome_ec.c     Sun Mar 30 15:22:36 2014        
(r263936)
@@ -0,0 +1,253 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <b...@bsdpad.com>
+ * 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 EXPREC OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNEC 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 BUSINEC 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.
+ */
+
+/*
+ * Samsung Chromebook Embedded Controller
+ */
+
+#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/malloc.h>
+#include <sys/rman.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/watchdog.h>
+#include <sys/gpio.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>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/intr.h>
+
+#include <dev/iicbus/iiconf.h>
+
+#include "iicbus_if.h"
+#include "gpio_if.h"
+
+#include <arm/samsung/exynos/chrome_ec.h>
+
+/* TODO: export to DTS */
+#define OUR_GPIO       177
+#define EC_GPIO                168
+
+struct ec_softc {
+       device_t        dev;
+};
+
+struct ec_softc *ec_sc;
+
+/*
+ * bus_claim, bus_release
+ * both functions used for bus arbitration
+ * in multi-master mode
+ */
+
+static int
+bus_claim(struct ec_softc *sc)
+{
+       device_t gpio_dev;
+       int status;
+
+       gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
+        if (gpio_dev == NULL) {
+               device_printf(sc->dev, "cant find gpio_dev\n");
+               return (1);
+       }
+
+       /* Say we want the bus */
+       GPIO_PIN_SET(gpio_dev, OUR_GPIO, GPIO_PIN_LOW);
+
+       /* Check EC decision */
+       GPIO_PIN_GET(gpio_dev, EC_GPIO, &status);
+
+       if (status == 1) {
+               /* Okay. We have bus */
+               return (0);
+       }
+
+       /* EC is master */
+       return (-1);
+}
+
+static int
+bus_release(struct ec_softc *sc)
+{
+       device_t gpio_dev;
+
+       gpio_dev = devclass_get_device(devclass_find("gpio"), 0);
+        if (gpio_dev == NULL) {
+               device_printf(sc->dev, "cant find gpio_dev\n");
+               return (1);
+       }
+
+       GPIO_PIN_SET(gpio_dev, OUR_GPIO, GPIO_PIN_HIGH);
+
+       return (0);
+}
+
+static int
+ec_probe(device_t dev)
+{
+
+       device_set_desc(dev, "Chromebook Embedded Controller");
+       return (BUS_PROBE_DEFAULT);
+}
+
+static int
+fill_checksum(uint8_t *data_out, int len)
+{
+       int res;
+       int i;
+
+       res = 0;
+       for (i = 0; i < len; i++) {
+               res += data_out[i];
+       }
+
+       data_out[len] = (res & 0xff);
+
+       return (0);
+}
+
+int
+ec_command(uint8_t cmd, uint8_t *dout, uint8_t dout_len,
+    uint8_t *dinp, uint8_t dinp_len)
+{
+       struct ec_softc *sc;
+       uint8_t *msg_dout;
+       uint8_t *msg_dinp;
+       int ret;
+       int i;
+
+       msg_dout = malloc(dout_len + 4, M_DEVBUF, M_NOWAIT);
+       msg_dinp = malloc(dinp_len + 4, M_DEVBUF, M_NOWAIT);
+
+       if (ec_sc == NULL)
+               return (-1);
+
+       sc = ec_sc;
+
+       msg_dout[0] = EC_CMD_VERSION0;
+       msg_dout[1] = cmd;
+       msg_dout[2] = dout_len;
+
+       for (i = 0; i < dout_len; i++) {
+               msg_dout[i + 3] = dout[i];
+       };
+
+       fill_checksum(msg_dout, dout_len + 3);
+
+       struct iic_msg msgs[] = {
+               { 0x1e, IIC_M_WR, dout_len + 4, msg_dout, },
+               { 0x1e, IIC_M_RD, dinp_len + 4, msg_dinp, },
+       };
+
+       ret = iicbus_transfer(sc->dev, msgs, 2);
+       if (ret != 0) {
+               device_printf(sc->dev, "i2c transfer returned %d\n", ret);
+               free(msg_dout, M_DEVBUF);
+               free(msg_dinp, M_DEVBUF);
+               return (-1);
+       }
+
+       for (i = 0; i < dinp_len; i++) {
+               dinp[i] = msg_dinp[i + 3];
+       };
+
+       free(msg_dout, M_DEVBUF);
+       free(msg_dinp, M_DEVBUF);
+       return (0);
+}
+
+int ec_hello(void)
+{
+       uint8_t data_in[4];
+       uint8_t data_out[4];
+
+       data_in[0] = 0x40;
+       data_in[1] = 0x30;
+       data_in[2] = 0x20;
+       data_in[3] = 0x10;
+
+       ec_command(EC_CMD_MKBP_STATE, data_in, 4,
+           data_out, 4);
+
+       return (0);
+}
+
+static int
+ec_attach(device_t dev)
+{
+       struct ec_softc *sc;
+
+       sc = device_get_softc(dev);
+       sc->dev = dev;
+
+       ec_sc = sc;
+
+       /*
+        * Claim the bus.
+        *
+        * We don't know cases when EC is master,
+        * so hold the bus forever for us.
+        *
+        */
+
+       if (bus_claim(sc) != 0) {
+               return (ENXIO);
+       }
+
+       return (0);
+}
+
+static device_method_t ec_methods[] = {
+       DEVMETHOD(device_probe,         ec_probe),
+       DEVMETHOD(device_attach,        ec_attach),
+       { 0, 0 }
+};
+
+static driver_t ec_driver = {
+       "chrome_ec",
+       ec_methods,
+       sizeof(struct ec_softc),
+};
+
+static devclass_t ec_devclass;
+
+DRIVER_MODULE(chrome_ec, iicbus, ec_driver, ec_devclass, 0, 0);
+MODULE_VERSION(chrome_ec, 1);
+MODULE_DEPEND(chrome_ec, iicbus, 1, 1, 1);

Added: head/sys/arm/samsung/exynos/chrome_ec.h
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/sys/arm/samsung/exynos/chrome_ec.h     Sun Mar 30 15:22:36 2014        
(r263936)
@@ -0,0 +1,36 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <b...@bsdpad.com>
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#define        EC_CMD_HELLO            0x01
+#define        EC_CMD_GET_VERSION      0x02
+#define        EC_CMD_MKBP_STATE       0x60
+#define        EC_CMD_VERSION0         0xdc
+
+int ec_command(uint8_t cmd, uint8_t *dout, uint8_t dout_len,
+    uint8_t *dinp, uint8_t dinp_len);
+int ec_hello(void);

Added: head/sys/arm/samsung/exynos/chrome_kb.c
==============================================================================
--- /dev/null   00:00:00 1970   (empty, because file is newly added)
+++ head/sys/arm/samsung/exynos/chrome_kb.c     Sun Mar 30 15:22:36 2014        
(r263936)
@@ -0,0 +1,792 @@
+/*-
+ * Copyright (c) 2014 Ruslan Bukin <b...@bsdpad.com>
+ * 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.
+ */
+
+/*
+ * Samsung Chromebook Keyboard
+ */
+
+#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/malloc.h>
+#include <sys/rman.h>
+#include <sys/proc.h>
+#include <sys/sched.h>
+#include <sys/kdb.h>
+#include <sys/timeet.h>
+#include <sys/timetc.h>
+#include <sys/mutex.h>
+#include <sys/gpio.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>
+
+#include <sys/ioccom.h>
+#include <sys/filio.h>
+#include <sys/tty.h>
+#include <sys/kbio.h>
+
+#include <machine/bus.h>
+#include <machine/fdt.h>
+#include <machine/cpu.h>
+#include <machine/intr.h>
+
+#include "gpio_if.h"
+
+#include <arm/samsung/exynos/chrome_ec.h>
+#include <arm/samsung/exynos/chrome_kb.h>
+
+#include <arm/samsung/exynos/exynos5_combiner.h>
+#include <arm/samsung/exynos/exynos5_pad.h>
+
+#define        CKB_LOCK()      mtx_lock(&Giant)
+#define        CKB_UNLOCK()    mtx_unlock(&Giant)
+
+#ifdef INVARIANTS
+/*
+ * Assert that the lock is held in all contexts
+ * where the code can be executed.
+ */
+#define        CKB_LOCK_ASSERT()       mtx_assert(&Giant, MA_OWNED)
+/*
+ * Assert that the lock is held in the contexts
+ * where it really has to be so.
+ */
+#define        CKB_CTX_LOCK_ASSERT()                           \
+       do {                                            \
+               if (!kdb_active && panicstr == NULL)    \
+                       mtx_assert(&Giant, MA_OWNED);   \
+       } while (0)
+#else
+#define CKB_LOCK_ASSERT()      (void)0
+#define CKB_CTX_LOCK_ASSERT()  (void)0
+#endif
+
+/*
+ * Define a stub keyboard driver in case one hasn't been
+ * compiled into the kernel
+ */
+#include <sys/kbio.h>
+#include <dev/kbd/kbdreg.h>
+#include <dev/kbd/kbdtables.h>
+
+#define        CKB_NFKEY               12
+#define        CKB_FLAG_COMPOSE        0x1
+#define        CKB_FLAG_POLLING        0x2
+#define        KBD_DRIVER_NAME         "ckbd"
+
+/* TODO: take interrupt from DTS */
+#define        KB_GPIO_INT             146
+
+struct ckb_softc {
+       keyboard_t sc_kbd;
+       keymap_t sc_keymap;
+       accentmap_t sc_accmap;
+       fkeytab_t sc_fkeymap[CKB_NFKEY];
+
+       struct resource*        sc_mem_res;
+       struct resource*        sc_irq_res;
+       void*                   sc_intr_hl;
+
+       int     sc_mode;        /* input mode (K_XLATE,K_RAW,K_CODE) */
+       int     sc_state;       /* shift/lock key state */
+       int     sc_accents;     /* accent key index (> 0) */
+       int     sc_flags;       /* flags */
+
+       struct callout          sc_repeat_callout;
+       int                     sc_repeat_key;
+       int                     sc_repeating;
+
+       int                     flag;
+       int                     rows;
+       int                     cols;
+       device_t                dev;
+       struct thread           *sc_poll_thread;
+
+       uint8_t                 *scan_local;
+       uint8_t                 *scan;
+};
+
+/* prototypes */
+static void    ckb_set_leds(struct ckb_softc *, uint8_t);
+static int     ckb_set_typematic(keyboard_t *, int);
+static uint32_t        ckb_read_char(keyboard_t *, int);
+static void    ckb_clear_state(keyboard_t *);
+static int     ckb_ioctl(keyboard_t *, u_long, caddr_t);
+static int     ckb_enable(keyboard_t *);
+static int     ckb_disable(keyboard_t *);
+
+static void
+ckb_repeat(void *arg)
+{
+       struct ckb_softc *sc;
+
+       sc = arg;
+
+       if (KBD_IS_ACTIVE(&sc->sc_kbd) && KBD_IS_BUSY(&sc->sc_kbd)) {
+               if (sc->sc_repeat_key != -1) {
+                       sc->sc_repeating = 1;
+                       sc->sc_kbd.kb_callback.kc_func(&sc->sc_kbd,
+                           KBDIO_KEYINPUT, sc->sc_kbd.kb_callback.kc_arg);
+               }
+       }
+}
+
+/* detect a keyboard, not used */
+static int
+ckb__probe(int unit, void *arg, int flags)
+{
+
+       return (ENXIO);
+}
+
+/* reset and initialize the device, not used */
+static int
+ckb_init(int unit, keyboard_t **kbdp, void *arg, int flags)
+{
+
+       return (ENXIO);
+}
+
+/* test the interface to the device, not used */
+static int
+ckb_test_if(keyboard_t *kbd)
+{
+
+       return (0);
+}
+
+/* finish using this keyboard, not used */
+static int
+ckb_term(keyboard_t *kbd)
+{
+
+       return (ENXIO);
+}
+
+/* keyboard interrupt routine, not used */
+static int
+ckb_intr(keyboard_t *kbd, void *arg)
+{
+
+        return (0);
+}
+
+/* lock the access to the keyboard, not used */
+static int
+ckb_lock(keyboard_t *kbd, int lock)
+{
+
+        return (1);
+}
+
+/* clear the internal state of the keyboard */
+static void
+ckb_clear_state(keyboard_t *kbd)
+{
+       struct ckb_softc *sc;
+
+       sc = kbd->kb_data;
+
+       CKB_CTX_LOCK_ASSERT();
+
+       sc->sc_flags &= ~(CKB_FLAG_COMPOSE | CKB_FLAG_POLLING);
+       sc->sc_state &= LOCK_MASK; /* preserve locking key state */
+       sc->sc_accents = 0;
+}
+
+/* save the internal state, not used */
+static int
+ckb_get_state(keyboard_t *kbd, void *buf, size_t len)
+{
+
+       return (len == 0) ? 1 : -1;
+}
+
+/* set the internal state, not used */
+static int
+ckb_set_state(keyboard_t *kbd, void *buf, size_t len)
+{
+
+       return (EINVAL);
+}
+
+
+/* check if data is waiting */
+static int
+ckb_check(keyboard_t *kbd)
+{
+       struct ckb_softc *sc;
+       int i;
+
+       sc = kbd->kb_data;
+
+       CKB_CTX_LOCK_ASSERT();
+
+       if (!KBD_IS_ACTIVE(kbd))
+               return (0);
+
+       if (sc->sc_flags & CKB_FLAG_POLLING) {
+               return (1);
+       };
+
+       for (i = 0; i < sc->cols; i++)
+               if (sc->scan_local[i] != sc->scan[i]) {
+                       return (1);
+               };
+
+       if (sc->sc_repeating)
+               return (1);
+
+       return (0);
+}
+
+/* check if char is waiting */
+static int
+ckb_check_char_locked(keyboard_t *kbd)
+{
+       CKB_CTX_LOCK_ASSERT();
+
+       if (!KBD_IS_ACTIVE(kbd))
+               return (0);
+
+       return (ckb_check(kbd));
+}
+
+static int
+ckb_check_char(keyboard_t *kbd)
+{
+       int result;
+
+       CKB_LOCK();
+       result = ckb_check_char_locked(kbd);
+       CKB_UNLOCK();
+
+       return (result);
+}
+
+/* read one byte from the keyboard if it's allowed */
+/* Currently unused. */
+static int
+ckb_read(keyboard_t *kbd, int wait)
+{
+       CKB_CTX_LOCK_ASSERT();
+
+       if (!KBD_IS_ACTIVE(kbd))
+               return (-1);
+
+       printf("Implement ME: %s\n", __func__);
+       return (0);
+}
+
+int scantokey(int i, int j);
+
+int
+scantokey(int i, int j)
+{
+       int k;
+
+       for (k = 0; k < KEYMAP_LEN; k++)
+               if ((keymap[k].col == i) && (keymap[k].row == j))
+                       return (keymap[k].key);
+
+       return (0);
+}
+
+/* read char from the keyboard */
+static uint32_t
+ckb_read_char_locked(keyboard_t *kbd, int wait)
+{
+       struct ckb_softc *sc;
+       int i,j;
+       uint16_t key;
+       int oldbit;
+       int newbit;
+
+       sc = kbd->kb_data;
+
+       CKB_CTX_LOCK_ASSERT();
+
+       if (!KBD_IS_ACTIVE(kbd))
+               return (NOKEY);
+
+       if (sc->sc_repeating) {
+               sc->sc_repeating = 0;
+               callout_reset(&sc->sc_repeat_callout, hz / 10,
+                    ckb_repeat, sc);
+               return (sc->sc_repeat_key);
+       };
+
+       if (sc->sc_flags & CKB_FLAG_POLLING) {
+               /* TODO */
+       };
+
+       for (i = 0; i < sc->cols; i++) {
+               for (j = 0; j < sc->rows; j++) {
+                       oldbit = (sc->scan_local[i] & (1 << j));
+                       newbit = (sc->scan[i] & (1 << j));
+
+                       if (oldbit == newbit)
+                               continue;
+
+                       key = scantokey(i,j);
+                       if (key == 0) {
+                               continue;
+                       };
+
+                       if (newbit > 0) {
+                               /* key pressed */
+                               sc->scan_local[i] |= (1 << j);
+
+                               /* setup repeating */
+                               sc->sc_repeat_key = key;
+                               callout_reset(&sc->sc_repeat_callout,
+                                   hz / 2, ckb_repeat, sc);
+
+                       } else {
+                               /* key released */
+                               sc->scan_local[i] &= ~(1 << j);
+
+                               /* release flag */
+                               key |= 0x80;
+
+                               /* unsetup repeating */
+                               sc->sc_repeat_key = -1;
+                               callout_stop(&sc->sc_repeat_callout);
+                       }
+
+                       return (key);
+               }
+       }
+
+       return (NOKEY);
+}
+
+/* Currently wait is always false. */
+static uint32_t
+ckb_read_char(keyboard_t *kbd, int wait)
+{
+       uint32_t keycode;
+
+       CKB_LOCK();
+       keycode = ckb_read_char_locked(kbd, wait);
+       CKB_UNLOCK();
+
+       return (keycode);
+}
+
+
+/* some useful control functions */
+static int
+ckb_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
+{
+       struct ckb_softc *sc;
+       int i;
+
+       sc = kbd->kb_data;
+
+       CKB_LOCK_ASSERT();
+
+       switch (cmd) {
+       case KDGKBMODE:         /* get keyboard mode */
+               *(int *)arg = sc->sc_mode;
+               break;
+
+       case KDSKBMODE:         /* set keyboard mode */
+               switch (*(int *)arg) {
+               case K_XLATE:
+                       if (sc->sc_mode != K_XLATE) {
+                               /* make lock key state and LED state match */
+                               sc->sc_state &= ~LOCK_MASK;
+                               sc->sc_state |= KBD_LED_VAL(kbd);
+                       }
+                       /* FALLTHROUGH */
+               case K_RAW:
+               case K_CODE:
+                       if (sc->sc_mode != *(int *)arg) {
+                               if ((sc->sc_flags & CKB_FLAG_POLLING) == 0)
+                                       ckb_clear_state(kbd);
+                               sc->sc_mode = *(int *)arg;
+                       }
+                       break;
+               default:
+                       return (EINVAL);
+               }
+               break;
+
+       case KDGETLED:                  /* get keyboard LED */
+               *(int *)arg = KBD_LED_VAL(kbd);
+               break;
+
+       case KDSETLED:                  /* set keyboard LED */
+               /* NOTE: lock key state in "sc_state" won't be changed */
+               if (*(int *)arg & ~LOCK_MASK)
+                       return (EINVAL);
+
+               i = *(int *)arg;
+
+               /* replace CAPS LED with ALTGR LED for ALTGR keyboards */
+               if (sc->sc_mode == K_XLATE &&
+                   kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
+                       if (i & ALKED)
+                               i |= CLKED;
+                       else
+                               i &= ~CLKED;
+               }
+               if (KBD_HAS_DEVICE(kbd)) {
+                       /* Configure LED */
+               }
+
+               KBD_LED_VAL(kbd) = *(int *)arg;
+               break;
+       case KDGKBSTATE:                /* get lock key state */
+               *(int *)arg = sc->sc_state & LOCK_MASK;
+               break;
+
+       case KDSKBSTATE:                /* set lock key state */
+               if (*(int *)arg & ~LOCK_MASK) {
+                       return (EINVAL);
+               }
+               sc->sc_state &= ~LOCK_MASK;
+               sc->sc_state |= *(int *)arg;
+
+               /* set LEDs and quit */
+               return (ckb_ioctl(kbd, KDSETLED, arg));
+
+       case KDSETREPEAT:               /* set keyboard repeat rate (new
+                                        * interface) */
+
+               if (!KBD_HAS_DEVICE(kbd)) {
+                       return (0);
+               }
+               if (((int *)arg)[1] < 0) {
+                       return (EINVAL);
+               }
+               if (((int *)arg)[0] < 0) {
+                       return (EINVAL);
+               }
+               if (((int *)arg)[0] < 200)      /* fastest possible value */
+                       kbd->kb_delay1 = 200;
+               else
+                       kbd->kb_delay1 = ((int *)arg)[0];
+               kbd->kb_delay2 = ((int *)arg)[1];
+               return (0);
+
+       case KDSETRAD:                  /* set keyboard repeat rate (old
+                                        * interface) */
+               return (ckb_set_typematic(kbd, *(int *)arg));
+
+       case PIO_KEYMAP:                /* set keyboard translation table */
+       case OPIO_KEYMAP:               /* set keyboard translation table
+                                        * (compat) */
+       case PIO_KEYMAPENT:             /* set keyboard translation table
+                                        * entry */
+       case PIO_DEADKEYMAP:            /* set accent key translation table */
+               sc->sc_accents = 0;
+               /* FALLTHROUGH */
+       default:
+               return (genkbd_commonioctl(kbd, cmd, arg));
+       }
+
+       return (0);
+}
+
+static int
+ckb_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
+{
+       int result;
+
+       /*
+        * XXX KDGKBSTATE, KDSKBSTATE and KDSETLED can be called from any
+        * context where printf(9) can be called, which among other things
+        * includes interrupt filters and threads with any kinds of locks
+        * already held.  For this reason it would be dangerous to acquire
+        * the Giant here unconditionally.  On the other hand we have to
+        * have it to handle the ioctl.
+        * So we make our best effort to auto-detect whether we can grab
+        * the Giant or not.  Blame syscons(4) for this.
+        */
+       switch (cmd) {
+       case KDGKBSTATE:
+       case KDSKBSTATE:
+       case KDSETLED:
+               if (!mtx_owned(&Giant) && !SCHEDULER_STOPPED())
+                       return (EDEADLK);       /* best I could come up with */
+               /* FALLTHROUGH */
+       default:
+               CKB_LOCK();
+               result = ckb_ioctl_locked(kbd, cmd, arg);
+               CKB_UNLOCK();
+               return (result);
+       }
+}
+
+
+/*
+ * Enable the access to the device; until this function is called,
+ * the client cannot read from the keyboard.
+ */
+static int
+ckb_enable(keyboard_t *kbd)
+{
+
+       CKB_LOCK();
+       KBD_ACTIVATE(kbd);
+       CKB_UNLOCK();
+
+       return (0);
+}
+
+/* disallow the access to the device */
+static int
+ckb_disable(keyboard_t *kbd)
+{
+
+       CKB_LOCK();
+       KBD_DEACTIVATE(kbd);
+       CKB_UNLOCK();
+
+       return (0);
+}
+
+/* local functions */
+
+static int
+ckb_set_typematic(keyboard_t *kbd, int code)
+{
+       static const int delays[] = {250, 500, 750, 1000};
+       static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63,
+               68, 76, 84, 92, 100, 110, 118, 126,
+               136, 152, 168, 184, 200, 220, 236, 252,
+       272, 304, 336, 368, 400, 440, 472, 504};
+
+       if (code & ~0x7f) {
+               return (EINVAL);
+       }
+       kbd->kb_delay1 = delays[(code >> 5) & 3];
+       kbd->kb_delay2 = rates[code & 0x1f];
+       return (0);
+}
+
+static int
+ckb_poll(keyboard_t *kbd, int on)
+{
+       struct ckb_softc *sc;
+
+       sc = kbd->kb_data;
+
+       CKB_LOCK();
+       if (on) {
+               sc->sc_flags |= CKB_FLAG_POLLING;
+               sc->sc_poll_thread = curthread;
+       } else {
+               sc->sc_flags &= ~CKB_FLAG_POLLING;
+       }
+       CKB_UNLOCK();
+
+       return (0);
+}
+
+/* local functions */
+
+static int dummy_kbd_configure(int flags);
+
+keyboard_switch_t ckbdsw = {
+       .probe = &ckb__probe,
+       .init = &ckb_init,
+       .term = &ckb_term,
+       .intr = &ckb_intr,
+       .test_if = &ckb_test_if,
+       .enable = &ckb_enable,
+       .disable = &ckb_disable,
+       .read = &ckb_read,
+       .check = &ckb_check,
+       .read_char = &ckb_read_char,
+       .check_char = &ckb_check_char,
+       .ioctl = &ckb_ioctl,
+       .lock = &ckb_lock,
+       .clear_state = &ckb_clear_state,
+       .get_state = &ckb_get_state,
+       .set_state = &ckb_set_state,
+       .get_fkeystr = &genkbd_get_fkeystr,
+       .poll = &ckb_poll,
+       .diag = &genkbd_diag,
+};
+
+static int
+dummy_kbd_configure(int flags)
+{
+
+       return (0);
+}
+
+KEYBOARD_DRIVER(ckbd, ckbdsw, dummy_kbd_configure);
+
+static int
+parse_dts(struct ckb_softc *sc)
+{
+       phandle_t node;
+       pcell_t dts_value;
+       int len;
+
+       if ((node = ofw_bus_get_node(sc->dev)) == -1)
+               return (ENXIO);
+
+       if ((len = OF_getproplen(node, "keypad,num-rows")) <= 0)
+               return (ENXIO);
+       OF_getprop(node, "keypad,num-rows", &dts_value, len);
+       sc->rows = fdt32_to_cpu(dts_value);
+
+       if ((len = OF_getproplen(node, "keypad,num-columns")) <= 0)
+               return (ENXIO);
+       OF_getprop(node, "keypad,num-columns", &dts_value, len);
+       sc->cols = fdt32_to_cpu(dts_value);
+
+       if ((sc->rows == 0) || (sc->cols == 0))
+               return (ENXIO);
+
+       return (0);
+}
+

*** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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