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apache / nuttx / a4aad284eb1ea78f3700d49cf7caedf291e81b04 / . / drivers / input / spq10kbd.c
blob: 19d16af5c3502ea56b664a989586eae1f8f69c8d [file] [log] [blame]
/****************************************************************************
* drivers/input/spq10kbd.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdbool.h>
#include <stdio.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <poll.h>
#include <fcntl.h>
#include <nuttx/input/spq10kbd.h>
#include <nuttx/input/djoystick.h>
#include <nuttx/i2c/i2c_master.h>
#include <nuttx/fs/fs.h>
#include <nuttx/kmalloc.h>
#include <nuttx/mutex.h>
#include <nuttx/semaphore.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* This format is used to construct the /dev/kbd[n] device driver path. It
* defined here so that it will be used consistently in all places.
*/
#define DEV_FORMAT "/dev/kbd%c"
#define DEV_NAMELEN 11
/* Number of Joystick discretes */
#define DJOY_NGPIOS 5
/* Bitset of supported Joystick discretes */
#define DJOY_SUPPORTED (DJOY_UP_BIT | DJOY_DOWN_BIT | DJOY_LEFT_BIT | \
DJOY_RIGHT_BIT | DJOY_BUTTON_1_BIT | \
DJOY_BUTTON_2_BIT | DJOY_BUTTON_3_BIT | \
DJOY_BUTTON_4_BIT)
/* Registers */
#define SPQ10KBD_VER 0x01
#define SPQ10KBD_CFG 0x02
#define SPQ10KBD_INT 0x03
#define SPQ10KBD_KEY 0x04
#define SPQ10KBD_BKL 0x05
#define SPQ10KBD_DEB 0x06
#define SPQ10KBD_FRQ 0x07
#define SPQ10KBD_RST 0x08
#define SPQ10KBD_FIF 0x09
/* VER */
#define SPQ10KBD_VER_MAJOR_SHIFT 4
#define SPQ10KBD_VER_MAJOR_MASK (0xf << SPQ10KBD_VER_MAJOR_SHIFT)
#define SPQ10KBD_VER_MINOR_SHIFT 0
#define SPQ10KBD_VER_MINOR_MASK (0xf << SPQ10KBD_VER_MINOR_SHIFT)
#define SPQ10KBD_VER_00_02 0x0002
/* CFG */
#define SPQ10KBD_CFG_OVERFLOW_ON (1 << 0)
#define SPQ10KBD_CFG_OVERFLOW_INT (1 << 1)
#define SPQ10KBD_CFG_CAPSLOCK_INT (1 << 2)
#define SPQ10KBD_CFG_NUMLOCK_INT (1 << 3)
#define SPQ10KBD_CFG_KEY_INT (1 << 4)
#define SPQ10KBD_CFG_PANIC_INT (1 << 5)
#define SPQ10KBD_CFG_REPORT_MODS (1 << 6)
#define SPQ10KBD_CFG_USE_MODS (1 << 7)
/* INT */
#define SPQ10KBD_INT_OVERFLOW (1 << 0)
#define SPQ10KBD_INT_CAPSLOCK (1 << 1)
#define SPQ10KBD_INT_NUMLOCK (1 << 2)
#define SPQ10KBD_INT_KEY (1 << 3)
#define SPQ10KBD_INT_PANIC (1 << 4)
/* KEY */
#define SPQ10KBD_KEY_COUNT_SHIFT 0
#define SPQ10KBD_KEY_COUNT_MASK (0xf << SPQ10KBD_KEY_COUNT_SHIFT)
#define SPQ10KBD_KEY_CAPSLOCK (1 << 5)
#define SPQ10KBD_KEY_NUMLOCK (1 << 6)
/* FIF */
#define SPQ10KBD_FIF_STATE_SHIFT 0
#define SPQ10KBD_FIF_STATE_MASK (0xff << SPQ10KBD_FIF_STATE_SHIFT)
#define SPQ10KBD_FIF_KEY_SHIFT 8
#define SPQ10KBD_FIF_KEY_MASK (0xff << SPQ10KBD_FIF_KEY_SHIFT)
#define KEY_PRESS 0x01
#define KEY_PRESS_HOLD 0x02
#define KEY_RELEASE 0x03
/* Special Key Encodings */
#define KEY_BUTTON_FIRST 0x01 /* Start of the button region */
#define KEY_JOY_UP 0x01
#define KEY_JOY_DOWN 0x02
#define KEY_JOY_LEFT 0x03
#define KEY_JOY_RIGHT 0x04
#define KEY_JOY_CENTER 0x05
#define KEY_BTN_LEFT1 0x06
#define KEY_BTN_RIGHT1 0x07
#define KEY_BACKSPACE 0x08 /* Normal ASCII */
#define KEY_TAB 0x09 /* Normal ASCII */
#define KEY_NL 0x0a /* Normal ASCII */
#define KEY_BTN_LEFT2 0x11
#define KEY_BTN_RIGHT2 0x12
#define KEY_BUTTON_LAST 0x12 /* End of the button region */
/* Key to joystick mapping */
#ifdef CONFIG_SPQ10KBD_DJOY
static const djoy_buttonset_t joystick_map[] =
{
0, /* No Key */
DJOY_UP_BIT, /* KEY_JOY_UP */
DJOY_DOWN_BIT, /* KEY_JOY_DOWN */
DJOY_LEFT_BIT, /* KEY_JOY_LEFT */
DJOY_RIGHT_BIT, /* KEY_JOY_RIGHT */
0, /* KEY_JOY_CENTER */
DJOY_BUTTON_1_BIT, /* KEY_BTN_LEFT1 */
DJOY_BUTTON_3_BIT, /* KEY_BTN_RIGHT1 */
0, /* KEY_BACKSPACE */
0, /* KEY_TAB */
0, /* KEY_NL */
0, /* No Key */
0, /* No Key */
0, /* No Key */
0, /* No Key */
0, /* No Key */
0, /* No Key */
DJOY_BUTTON_2_BIT, /* KEY_BTN_LEFT2 */
DJOY_BUTTON_4_BIT, /* KEY_BTN_RIGHT2 */
};
#endif /* CONFIG_SPQ10KBD_DJOY */
/****************************************************************************
* Private Types
****************************************************************************/
struct spq10kbd_dev_s
{
FAR const struct spq10kbd_config_s *config; /* Board configuration data */
FAR struct i2c_master_s *i2c; /* Saved I2C driver instance */
#ifdef CONFIG_SPQ10KBD_DJOY
struct djoy_lowerhalf_s djoylower; /* Digital joystick */
djoy_interrupt_t djoyhandle; /* Joystick handler func */
FAR void *djoycbarg; /* Joystick callback arg */
djoy_buttonset_t djoypressmask; /* Joystick press evts */
djoy_buttonset_t djoyreleasemask; /* Joystick release evts */
djoy_buttonset_t djoystate; /* Joystick button state */
#endif /* CONFIG_SPQ10KBD_DJOY */
mutex_t lock; /* Exclusive access to dev */
sem_t waitsem; /* Signal waiting thread */
bool waiting; /* Waiting for keyboard data */
struct work_s work; /* Supports the interrupt handling "bottom half" */
/* The following is a list if poll structures of threads waiting for
* driver events. The 'struct pollfd' reference for each open is also
* retained in the f_priv field of the 'struct file'.
*/
struct pollfd *fds[CONFIG_SPQ10KBD_NPOLLWAITERS];
/* Buffer used to collect and buffer incoming keyboard characters */
uint16_t headndx; /* Buffer head index */
uint16_t tailndx; /* Buffer tail index */
uint8_t kbdbuffer[CONFIG_SPQ10KBD_BUFSIZE];
uint8_t crefs; /* Reference count on the driver instance */
};
/****************************************************************************
* Static Function Prototypes
****************************************************************************/
static int spq10kbd_interrupt(int irq, FAR void *context, FAR void *arg);
static void spq10kbd_worker(FAR void *arg);
static void spq10kbd_putreg8(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr, uint8_t regval);
static uint8_t spq10kbd_getreg8(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr);
static uint16_t spq10kbd_getreg16(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr);
static int spq10kbd_checkver(FAR struct spq10kbd_dev_s *priv);
static int spq10kbd_reset(FAR struct spq10kbd_dev_s *priv);
static void spq10kbd_putbuffer(FAR struct spq10kbd_dev_s *priv,
uint8_t keycode);
/* Digital Joystick methods */
#ifdef CONFIG_SPQ10KBD_DJOY
static djoy_buttonset_t djoy_supported(
FAR const struct djoy_lowerhalf_s *lower);
static djoy_buttonset_t djoy_sample(
FAR const struct djoy_lowerhalf_s *lower);
static void djoy_enable(FAR const struct djoy_lowerhalf_s *lower,
djoy_buttonset_t press, djoy_buttonset_t release,
djoy_interrupt_t handler, FAR void *arg);
#endif /* CONFIG_SPQ10KBD_DJOY */
/* Driver methods. We export the keyboard as a standard character driver */
static int spq10kbd_open(FAR struct file *filep);
static int spq10kbd_close(FAR struct file *filep);
static ssize_t spq10kbd_read(FAR struct file *filep,
FAR char *buffer, size_t len);
static ssize_t spq10kbd_write(FAR struct file *filep,
FAR const char *buffer, size_t len);
static int spq10kbd_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
/****************************************************************************
* Private Data
****************************************************************************/
static const struct file_operations g_hidkbd_fops =
{
spq10kbd_open, /* open */
spq10kbd_close, /* close */
spq10kbd_read, /* read */
spq10kbd_write, /* write */
NULL, /* seek */
NULL, /* ioctl */
NULL, /* mmap */
NULL, /* truncate */
spq10kbd_poll /* poll */
};
/****************************************************************************
* Private Functions
****************************************************************************/
#ifdef CONFIG_SPQ10KBD_DJOY
/****************************************************************************
* Name: djoy_supported
*
* Description:
* Return the set of buttons supported on the discrete joystick device
*
****************************************************************************/
static djoy_buttonset_t djoy_supported(
FAR const struct djoy_lowerhalf_s *lower)
{
iinfo("Supported: %02x\n", DJOY_SUPPORTED);
return (djoy_buttonset_t)DJOY_SUPPORTED;
}
/****************************************************************************
* Name: djoy_sample
*
* Description:
* Return the current state of all discrete joystick buttons
*
****************************************************************************/
static djoy_buttonset_t djoy_sample(
FAR const struct djoy_lowerhalf_s *lower)
{
FAR struct spq10kbd_dev_s *priv =
(FAR struct spq10kbd_dev_s *)(lower->config);
return priv->djoystate;
}
/****************************************************************************
* Name: djoy_enable
*
* Description:
* Enable interrupts on the selected set of joystick buttons. An empty
* set will disable all interrupts.
*
****************************************************************************/
static void djoy_enable(FAR const struct djoy_lowerhalf_s *lower,
djoy_buttonset_t press, djoy_buttonset_t release,
djoy_interrupt_t handler, FAR void *arg)
{
FAR struct spq10kbd_dev_s *priv =
(FAR struct spq10kbd_dev_s *)(lower->config);
priv->djoypressmask = press;
priv->djoyreleasemask = release;
priv->djoyhandle = handler;
priv->djoycbarg = arg;
}
#endif /* CONFIG_SPQ10KBD_DJOY */
/****************************************************************************
* Name: spq10kbd_worker
****************************************************************************/
static void spq10kbd_worker(FAR void *arg)
{
FAR struct spq10kbd_dev_s *priv = (FAR struct spq10kbd_dev_s *)arg;
uint16_t regval;
uint8_t key;
uint8_t state;
int ret;
ret = nxmutex_lock(&priv->lock);
if (ret < 0)
{
return;
}
regval = spq10kbd_getreg8(priv, SPQ10KBD_INT);
if (regval & SPQ10KBD_INT_KEY)
{
/* There is a keypress in the FIFO */
while (spq10kbd_getreg8(priv, SPQ10KBD_KEY) & SPQ10KBD_KEY_COUNT_MASK)
{
regval = spq10kbd_getreg16(priv, SPQ10KBD_FIF);
state = (regval & SPQ10KBD_FIF_STATE_MASK) >> \
SPQ10KBD_FIF_STATE_SHIFT;
key = (regval & SPQ10KBD_FIF_KEY_MASK) >> SPQ10KBD_FIF_KEY_SHIFT;
if (key <= KEY_BUTTON_LAST &&
!(key == KEY_BACKSPACE ||
key == KEY_TAB ||
key == KEY_NL))
{
#ifdef CONFIG_SPQ10KBD_DJOY
if (joystick_map[key] == 0)
{
/* Key is not mapped, skip */
iinfo("Skipping unmapped key %02x\n", key);
}
switch (state)
{
case KEY_PRESS:
iinfo("Button Press: %02x\n", key);
priv->djoystate |= joystick_map[key];
if (priv->djoypressmask & joystick_map[key])
{
priv->djoyhandle(&priv->djoylower,
priv->djoycbarg);
}
break;
case KEY_RELEASE:
iinfo("Button Release: %02x\n", key);
priv->djoystate &= ~joystick_map[key];
if (priv->djoypressmask & joystick_map[key])
{
priv->djoyhandle(&priv->djoylower,
priv->djoycbarg);
}
break;
}
iinfo("Stored state: %02x\n", priv->djoystate);
#else
iinfo("Button Ignored. No joystick interface.\n");
#endif /* CONFIG_SPQ10KBD_DJOY */
}
else if(state == KEY_PRESS)
{
/* key is a normal ascii character */
spq10kbd_putbuffer(priv, key);
/* Notify waiting reads */
if (priv->waiting == true)
{
priv->waiting = false;
nxsem_post(&priv->waitsem);
}
}
}
}
/* Clear interrupt status register */
spq10kbd_putreg8(priv, SPQ10KBD_INT, 0);
nxmutex_unlock(&priv->lock);
}
/****************************************************************************
* Name: spq10kbd_interrupt
****************************************************************************/
static int spq10kbd_interrupt(int irq, FAR void *context, FAR void *arg)
{
FAR struct spq10kbd_dev_s *priv = (FAR struct spq10kbd_dev_s *)arg;
int ret;
/* Let the event worker know that it has an interrupt event to handle
* It is possbile that we will already have work scheduled from a
* previous interrupt event. That is OK we will service all the events
* in the same work job.
*/
if (work_available(&priv->work))
{
ret = work_queue(HPWORK, &priv->work, spq10kbd_worker, priv, 0);
if (ret != 0)
{
ierr("ERROR: Failed to queue work: %d\n", ret);
}
}
return OK;
}
/****************************************************************************
* Name: spq10kbd_open
*
* Description:
* Standard character driver open method.
*
****************************************************************************/
static int spq10kbd_open(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct spq10kbd_dev_s *priv;
inode = filep->f_inode;
priv = inode->i_private;
/* Increment the reference count on the driver */
priv->crefs++;
return OK;
}
/****************************************************************************
* Name: spq10kbd_close
*
* Description:
* Standard character driver close method.
*
****************************************************************************/
static int spq10kbd_close(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct spq10kbd_dev_s *priv;
inode = filep->f_inode;
priv = inode->i_private;
/* Decrement the reference count on the driver */
DEBUGASSERT(priv->crefs >= 1);
priv->crefs--;
return OK;
}
/****************************************************************************
* Name: spq10kbd_read
*
* Description:
* Standard character driver read method.
*
****************************************************************************/
static ssize_t spq10kbd_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode;
FAR struct spq10kbd_dev_s *priv;
size_t nbytes;
uint16_t tail;
int ret;
DEBUGASSERT(buffer);
inode = filep->f_inode;
priv = inode->i_private;
/* Read data from our internal buffer of received characters */
ret = nxmutex_lock(&priv->lock);
if (ret < 0)
{
return ret;
}
while (priv->tailndx == priv->headndx)
{
/* No.. were we open non-blocking? */
if (filep->f_oflags & O_NONBLOCK)
{
/* Yes.. then return a failure */
ret = -EAGAIN;
goto errout;
}
else
{
priv->waiting = true;
nxmutex_unlock(&priv->lock);
ret = nxsem_wait_uninterruptible(&priv->waitsem);
if (ret < 0)
{
return ret;
}
ret = nxmutex_lock(&priv->lock);
if (ret < 0)
{
return ret;
}
}
}
for (tail = priv->tailndx, nbytes = 0;
tail != priv->headndx && nbytes < len;
nbytes++)
{
/* Copy the next keyboard character into the user buffer */
*buffer++ = priv->kbdbuffer[tail];
/* Handle wrap-around of the tail index */
if (++tail >= CONFIG_SPQ10KBD_BUFSIZE)
{
tail = 0;
}
}
ret = nbytes;
/* Update the tail index (perhaps marking the buffer empty) */
priv->tailndx = tail;
errout:
nxmutex_unlock(&priv->lock);
return ret;
}
/****************************************************************************
* Name: spq10kbd_write
*
* Description:
* Standard character driver write method.
*
****************************************************************************/
static ssize_t spq10kbd_write(FAR struct file *filep, FAR const char *buffer,
size_t len)
{
/* We won't try to write to the keyboard */
return -ENOSYS;
}
/****************************************************************************
* Name: spq10kbd_poll
*
* Description:
* Standard character driver poll method.
*
****************************************************************************/
static int spq10kbd_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode;
FAR struct spq10kbd_dev_s *priv;
int ret;
int i;
DEBUGASSERT(fds);
inode = filep->f_inode;
priv = inode->i_private;
/* Make sure that we have exclusive access to the private data structure */
DEBUGASSERT(priv);
ret = nxmutex_lock(&priv->lock);
if (ret < 0)
{
return ret;
}
if (setup)
{
/* This is a request to set up the poll. Find an available slot for
* the poll structure reference
*/
for (i = 0; i < CONFIG_SPQ10KBD_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!priv->fds[i])
{
/* Bind the poll structure and this slot */
priv->fds[i] = fds;
fds->priv = &priv->fds[i];
break;
}
}
if (i >= CONFIG_SPQ10KBD_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto errout;
}
/* Should we immediately notify on any of the requested events? Notify
* the POLLIN event if there is buffered keyboard data.
*/
if (priv->headndx != priv->tailndx)
{
poll_notify(&fds, 1, POLLIN);
}
}
else
{
/* This is a request to tear down the poll. */
struct pollfd **slot = (struct pollfd **)fds->priv;
DEBUGASSERT(slot);
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
}
errout:
nxmutex_unlock(&priv->lock);
return ret;
}
/****************************************************************************
* Name: spq10kbd_putbuffer
*
* Description:
* Add one character to the user buffer.
* Expectation is that we already have exclusive use of the device.
*
* Input Parameters:
* priv - Driver internal state
* keycode - The value to add to the user buffer
*
* Returned Value:
* None
*
****************************************************************************/
static void spq10kbd_putbuffer(FAR struct spq10kbd_dev_s *priv,
uint8_t keycode)
{
uint16_t head;
uint16_t tail;
DEBUGASSERT(priv);
/* Copy the next keyboard character into the user buffer. */
head = priv->headndx;
priv->kbdbuffer[head] = keycode;
/* Increment the head index */
if (++head >= CONFIG_SPQ10KBD_BUFSIZE)
{
head = 0;
}
/* If the buffer is full, then increment the tail index to make space.
* Drop old unread key presses.
*/
tail = priv->tailndx;
if (tail == head)
{
if (++tail >= CONFIG_SPQ10KBD_BUFSIZE)
{
tail = 0;
}
/* Save the updated tail index */
priv->tailndx = tail;
}
/* Save the updated head index */
priv->headndx = head;
}
/****************************************************************************
* Name: spq10kbd_checkver
*
* Description:
* Read and verify the Q10 Keyboard Controller Version
*
****************************************************************************/
static int spq10kbd_checkver(FAR struct spq10kbd_dev_s *priv)
{
uint8_t version;
/* Read device version */
version = spq10kbd_getreg8(priv, SPQ10KBD_VER);
iinfo("version: %02x\n", version);
if (version != SPQ10KBD_VER_00_02)
{
/* Version is not Correct */
return -ENODEV;
}
return OK;
}
/****************************************************************************
* Name: spq10kbd_reset
*
* Description:
* Reset the Q10 Keyboard Controller Version
*
****************************************************************************/
static int spq10kbd_reset(FAR struct spq10kbd_dev_s *priv)
{
spq10kbd_putreg8(priv, SPQ10KBD_RST, 0xff);
return OK;
}
/****************************************************************************
* Name: spq10kbd_getreg8
*
* Description:
* Read from an 8-bit Q10 Keyboard register
*
****************************************************************************/
static uint8_t spq10kbd_getreg8(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr)
{
/* 8-bit data read sequence:
*
* Start - I2C_Write_Address - Q10_Reg_Address -
* Repeated_Start - I2C_Read_Address - Q10_Read_Data - STOP
*/
struct i2c_msg_s msg[2];
uint8_t regval;
int ret;
/* Setup 8-bit Q10 Keyboard address write message */
msg[0].frequency = priv->config->frequency; /* I2C frequency */
msg[0].addr = priv->config->address; /* 7-bit address */
msg[0].flags = 0; /* Write transaction, beginning with START */
msg[0].buffer = &regaddr; /* Transfer from this address */
msg[0].length = 1; /* Send one byte following the address
* (no STOP) */
/* Set up the 8-bit Q10 Keyboard data read message */
msg[1].frequency = priv->config->frequency; /* I2C frequency */
msg[1].addr = priv->config->address; /* 7-bit address */
msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */
msg[1].buffer = &regval; /* Transfer to this address */
msg[1].length = 1; /* Receive one byte following the address
* (then STOP) */
/* Perform the transfer */
ret = I2C_TRANSFER(priv->i2c, msg, 2);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return 0;
}
#ifdef CONFIG_SPQ10KBD_REGDBG
_err("%02x->%02x\n", regaddr, regval);
#endif
return regval;
}
/****************************************************************************
* Name: spq10kbd_getreg16
*
* Description:
* Read from an 8-bit Q10 Keyboard register
*
****************************************************************************/
static uint16_t spq10kbd_getreg16(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr)
{
/* 8-bit data read sequence:
*
* Start - I2C_Write_Address - Q10_Reg_Address -
* Repeated_Start - I2C_Read_Address - Q10_Read_Data - STOP
*/
struct i2c_msg_s msg[2];
uint8_t regval[2];
uint16_t ret;
/* Setup 8-bit Q10 Keyboard address write message */
msg[0].frequency = priv->config->frequency; /* I2C frequency */
msg[0].addr = priv->config->address; /* 7-bit address */
msg[0].flags = 0; /* Write transaction, beginning with START */
msg[0].buffer = &regaddr; /* Transfer from this address */
msg[0].length = 1; /* Send one byte following the address
* (no STOP) */
/* Set up the 8-bit Q10 Keyboard data read message */
msg[1].frequency = priv->config->frequency; /* I2C frequency */
msg[1].addr = priv->config->address; /* 7-bit address */
msg[1].flags = I2C_M_READ; /* Read transaction, beginning with Re-START */
msg[1].buffer = regval; /* Transfer to this address */
msg[1].length = 2; /* Receive two bytes following the address
* (then STOP) */
/* Perform the transfer */
ret = I2C_TRANSFER(priv->i2c, msg, 2);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
return 0;
}
ret = (regval[1] << 8) | regval[0];
#ifdef CONFIG_SPQ10KBD_REGDBG
_err("%02x->%04x\n", regaddr, ret);
#endif
return ret;
}
/****************************************************************************
* Name: spq10kbd_putreg8
*
* Description:
* Write a value to an 8-bit Q10 Keyboard register
*
****************************************************************************/
static void spq10kbd_putreg8(FAR struct spq10kbd_dev_s *priv,
uint8_t regaddr, uint8_t regval)
{
/* 8-bit data read sequence:
*
* Start - I2C_Write_Address - Q10_Reg_Address - Q10_Write_Data - STOP
*/
struct i2c_msg_s msg;
uint8_t txbuffer[2];
int ret;
#ifdef CONFIG_SPQ10KBD_REGDBG
_err("%02x<-%02x\n", regaddr, regval);
#endif
/* Setup to the data to be transferred. Two bytes: The Q10 Keyboard
* register address followed by one byte of data.
*/
txbuffer[0] = regaddr;
txbuffer[1] = regval;
/* Setup 8-bit Q10 Keyboard address write message */
msg.frequency = priv->config->frequency; /* I2C frequency */
msg.addr = priv->config->address; /* 7-bit address */
msg.flags = 0; /* Write transaction, beginning with START */
msg.buffer = txbuffer; /* Transfer from this address */
msg.length = 2; /* Send two byte following the address
* (then STOP) */
/* Perform the transfer */
ret = I2C_TRANSFER(priv->i2c, &msg, 1);
if (ret < 0)
{
ierr("ERROR: I2C_TRANSFER failed: %d\n", ret);
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: spq10kbd_register
*
* Description:
* Configure the Solder Party Q10 Keyboard to use the provided I2C device
* instance. This will register the driver as /dev/kbdN where N is the
* minor device number, as well as a joystick at joydevname
*
* Input Parameters:
* i2c - An I2C driver instance
* config - Persistent board configuration data
* kbdminor - The keyboard input device minor number
* joydevname - The name of the joystick device /dev/djoyN
*
* Returned Value:
* Zero is returned on success. Otherwise, a negated errno value is
* returned to indicate the nature of the failure.
*
****************************************************************************/
#ifdef CONFIG_SPQ10KBD_DJOY
int spq10kbd_register(FAR struct i2c_master_s *i2c,
FAR const struct spq10kbd_config_s *config,
char kbdminor, char *joydevname)
#else
int spq10kbd_register(FAR struct i2c_master_s *i2c,
FAR const struct spq10kbd_config_s *config,
char kbdminor)
#endif
{
FAR struct spq10kbd_dev_s *priv;
char kbddevname[DEV_NAMELEN];
int ret;
/* Debug Sanity Checks */
DEBUGASSERT(i2c != NULL && config != NULL);
DEBUGASSERT(config->attach != NULL && config->enable != NULL &&
config->clear != NULL);
priv = kmm_zalloc(sizeof(struct spq10kbd_dev_s));
if (!priv)
{
ierr("ERROR: kmm_zalloc(%d) failed\n", sizeof(struct spq10kbd_dev_s));
return -ENOMEM;
}
/* Initialize the device driver instance */
priv->i2c = i2c; /* Save the I2C device handle */
priv->config = config; /* Save the board configuration */
priv->tailndx = 0; /* Reset keypress buffer state */
priv->headndx = 0;
priv->crefs = 0; /* Reset reference count to 0 */
priv->waiting = false;
#ifdef CONFIG_SPQ10KBD_DJOY
priv->djoylower.config = priv;
priv->djoylower.dl_supported = djoy_supported;
priv->djoylower.dl_sample = djoy_sample;
priv->djoylower.dl_enable = djoy_enable;
priv->djoyhandle = NULL;
priv->djoystate = 0;
#endif /* CONFIG_SPQ10KBD_DJOY */
nxmutex_init(&priv->lock); /* Initialize device mutex */
nxsem_init(&priv->waitsem, 0, 0);
config->clear(config);
config->enable(config, false);
/* Attach the interrupt handler */
ret = config->attach(config, spq10kbd_interrupt, priv);
if (ret < 0)
{
ierr("ERROR: Failed to attach interrupt\n");
goto errout_with_priv;
}
ret = spq10kbd_checkver(priv);
if (ret != OK)
{
/* Did not find a supported device on the bus */
return ret;
}
spq10kbd_reset(priv);
/* Start servicing events */
priv->config->enable(priv->config, true);
snprintf(kbddevname, sizeof(kbddevname), DEV_FORMAT, kbdminor);
iinfo("Registering %s\n", kbddevname);
ret = register_driver(kbddevname, &g_hidkbd_fops, 0666, priv);
#ifdef CONFIG_SPQ10KBD_DJOY
iinfo("Registering %s\n", joydevname);
ret = djoy_register(joydevname, &priv->djoylower);
#endif /* CONFIG_SPQ10KBD_DJOY */
return OK;
errout_with_priv:
nxmutex_destroy(&priv->lock);
nxsem_destroy(&priv->waitsem);
kmm_free(priv);
return ret;
}