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Subject[PATCH 1/3] Input/Joystick Driver: add support AD7142 joystick driver
Date
From: Michael Hennerich <michael.hennerich@analog.com>

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
---
drivers/input/joystick/Kconfig | 16 ++
drivers/input/joystick/Makefile | 1 +
drivers/input/joystick/ad7142.c | 450 +++++++++++++++++++++++++++++++++++++++
3 files changed, 467 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/joystick/ad7142.c

diff --git a/drivers/input/joystick/Kconfig b/drivers/input/joystick/Kconfig
index 7c662ee..aeb7cc9 100644
--- a/drivers/input/joystick/Kconfig
+++ b/drivers/input/joystick/Kconfig
@@ -282,4 +282,20 @@ config JOYSTICK_XPAD_LEDS
This option enables support for the LED which surrounds the Big X on
XBox 360 controller.

+config JOYSTICK_AD7142
+ tristate "Analog Devices AD7142 Joystick support"
+ depends on BFIN && I2C
+ help
+ Say Y here if you want to support an AD7142 joystick
+
+
+ config BFIN_JOYSTICK_IRQ_PFX
+ int "GPIO for Interrupt"
+ depends on (BFIN && JOYSTICK_AD7142)
+ range 33 120
+ default "55" if BFIN537_STAMP
+ default "39" if BFIN533_STAMP
+ help
+ Choose an GPIO as Keypad interrupt.[0..15]
+
endif
diff --git a/drivers/input/joystick/Makefile b/drivers/input/joystick/Makefile
index e855abb..8df388f 100644
--- a/drivers/input/joystick/Makefile
+++ b/drivers/input/joystick/Makefile
@@ -5,6 +5,7 @@
# Each configuration option enables a list of files.

obj-$(CONFIG_JOYSTICK_A3D) += a3d.o
+obj-$(CONFIG_JOYSTICK_AD7142) += ad7142.o
obj-$(CONFIG_JOYSTICK_ADI) += adi.o
obj-$(CONFIG_JOYSTICK_AMIGA) += amijoy.o
obj-$(CONFIG_JOYSTICK_ANALOG) += analog.o
diff --git a/drivers/input/joystick/ad7142.c b/drivers/input/joystick/ad7142.c
new file mode 100644
index 0000000..c7ab976
--- /dev/null
+++ b/drivers/input/joystick/ad7142.c
@@ -0,0 +1,450 @@
+/*
+ * File: drivers/input/joystick/ad7142.c
+ * Based on: drivers/input/joystick/amijoy.c
+ * Author: Aubrey.Li <aubrey.li@analog.com>
+ *
+ * Created: Apr 7th, 2006
+ * Description:
+ * Rev: $Id: ad7142.c 2460 2006-11-23 17:19:56Z hennerich $
+ *
+ * Modified:
+ * Copyright 2005-2005 Analog Devices Inc.
+ *
+ * Bugs: Enter bugs at http://blackfin.uclinux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.
+ * If not, write to the Free Software Foundation,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+
+#include <asm/uaccess.h>
+#include <asm/blackfin.h>
+#include <asm/irq.h>
+
+#undef DEBUG
+
+#ifdef DEBUG
+#define DPRINTK(x...) printk(x)
+#else
+#define DPRINTK(x...) do { } while (0)
+#endif
+
+MODULE_AUTHOR("Aubrey Li <aubrey.li@analog.com>");
+MODULE_DESCRIPTION("Driver for AD7142 joysticks");
+MODULE_LICENSE("GPL");
+
+/*
+ * Feeding the output queue to the device is handled by way of a
+ * workqueue.
+ */
+static struct task_struct *ad7142_task;
+static DECLARE_WAIT_QUEUE_HEAD(ad7142_wait);
+
+static int ad7142_used=0;
+static struct input_dev *ad7142_dev;
+static char *ad7142_phys={"ad7142/input0"};
+
+static char *ad7142_name = "ad7142 joystick";
+
+#define AD7142_DRV_NAME "ad7142_js"
+#define AD7142_I2C_ID 0xE622
+#define AD7142_I2C_ADDR 0x2C
+/*
+ * Ram map - these registers are defined as we go along
+ */
+#define PWRCONVCTL 0x00 // RW Power & conversion control
+
+#define AMBCOMPCTL_REG0 0x01 // RW Ambient compensation control register 0
+#define AMBCOMPCTL_REG1 0x02 // RW Ambient compensation control register 1
+#define AMBCOMPCTL_REG2 0x03 // RW Ambient compensation control register 2
+#define AMBCOMPCTL_REG3 0x04 // RW Ambient compensation control register 3
+
+#define INTEN_REG0 0x05 // RW Interrupt enable register 0
+#define INTEN_REG1 0x06 // RW Interrupt enable register 1
+#define INTEN_REG2 0x07 // RW Interrupt enable register 2
+#define INTSTAT_REG0 0x08 // R Low limit interrupt status register 0
+#define INTSTAT_REG1 0x09 // R High limit interrupt status register 1
+#define INTSTAT_REG2 0x0A // R Interrupt status register 2
+
+#define ADCRESULT_S0 0x0B // R ADC stage 0 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S1 0x0C // R ADC stage 1 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S2 0x0D // R ADC stage 2 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S3 0x0E // R ADC stage 3 result (uncompensated) actually located in SRAM
+
+#define ADCRESULT_S4 0x0F // R ADC stage 4 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S5 0x10 // R ADC stage 5 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S6 0x11 // R ADC stage 6 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S7 0x12 // R ADC stage 7 result (uncompensated) actually located in SRAM
+
+#define ADCRESULT_S8 0x13 // R ADC stage 8 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S9 0x14 // R ADC stage 9 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S10 0x15 // R ADC stage 10 result (uncompensated) actually located in SRAM
+#define ADCRESULT_S11 0x16 // R ADC stage 11 result (uncompensated) actually located in SRAM
+
+#define DEVID 0x17 // R I.D. Register
+
+#define THRES_STAT_REG0 0x40 // R Current threshold status register 0
+#define THRES_STAT_REG1 0x41 // R Current threshold status register 1
+#define PROX_STAT_REG 0x42 // R Current proximity status register 2
+
+#define STAGE0_CONNECTION 0x80
+#define STAGE1_CONNECTION 0x88
+#define STAGE2_CONNECTION 0x90
+#define STAGE3_CONNECTION 0x98
+#define STAGE4_CONNECTION 0xA0
+#define STAGE5_CONNECTION 0xA8
+#define STAGE6_CONNECTION 0xB0
+#define STAGE7_CONNECTION 0xB8
+#define STAGE8_CONNECTION 0xC0
+#define STAGE9_CONNECTION 0xC8
+#define STAGE10_CONNECTION 0xD0
+#define STAGE11_CONNECTION 0xD8
+
+/*
+ * STAGE0: Button1 <----> CIN6(+) Button2 <----> CIN5(-)
+ * STAGE1: Button3 <----> CIN4(-) Button4 <----> CIN3(+)
+ * STAGE2: Axes.Left <----> CIN11(-) Axes.Right <----> CIN13(+)
+ * STAGE3: Axes.Up <----> CIN12(-) Axes.Down <----> CIN10(+)
+ */
+static unsigned short stage[5][8]={
+ {0xE7FF, 0x3FFF, 0x0005, 0x2626, 0x01F4, 0x01F4, 0x028A, 0x028A},
+ {0xFDBF, 0x3FFF, 0x0001, 0x2626, 0x01F4, 0x01F4, 0x028A, 0x028A},
+ {0xFFFF, 0x2DFF, 0x0001, 0x2626, 0x01F4, 0x01F4, 0x028A, 0x028A},
+ {0xFFFF, 0x37BF, 0x0001, 0x2626, 0x01F4, 0x01F4, 0x028A, 0x028A},
+ {0xFFFF, 0x3FFF, 0x0000, 0x0606, 0x01F4, 0x01F4, 0x0320, 0x0320},
+};
+
+static struct i2c_driver ad7142_driver;
+static struct i2c_client *ad7142_client;
+
+static unsigned short ignore[] = { I2C_CLIENT_END };
+static unsigned short normal_addr[] = { AD7142_I2C_ADDR, I2C_CLIENT_END };
+
+static struct i2c_client_address_data addr_data = {
+ .normal_i2c = normal_addr,
+ .probe = ignore,
+ .ignore = ignore,
+};
+
+static int
+ad7142_probe (struct i2c_adapter *adap, int addr, int kind)
+{
+ struct i2c_client *client;
+ int rc;
+
+ client = kmalloc (sizeof (struct i2c_client), GFP_KERNEL);
+ if (!client)
+ return -ENOMEM;
+
+ memset (client, 0, sizeof (struct i2c_client));
+ strncpy (client->name, AD7142_DRV_NAME, I2C_NAME_SIZE);
+ client->addr = addr;
+ client->adapter = adap;
+ client->driver = &ad7142_driver;
+
+ if ((rc = i2c_attach_client (client)) != 0)
+ {
+ kfree (client);
+ printk ("i2c_attach_client fail: %d\n", rc);
+ return rc;
+ }
+
+ ad7142_client = client;
+ printk(KERN_INFO "%s_attach: at 0x%02x\n",
+ client->name, client->addr << 1);
+ return 0;
+}
+
+static int
+ad7142_i2c_write(struct i2c_client *client,
+ unsigned short offset,
+ unsigned short *data,
+ unsigned int len)
+{
+ int ret = -1;
+ int i;
+
+ if(len<1 || len>16){
+ printk("AD7142: Write data length error\n");
+ return ret;
+ }
+ /* the adv7142 has an autoincrement function, use it if
+ * the adapter understands raw I2C */
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ /* do raw I2C, not smbus compatible */
+ u8 block_data[34];
+
+ block_data[0] = (offset & 0xFF00)>>8;
+ block_data[1] = (offset & 0x00FF);
+ for(i=0;i<len;i++){
+ block_data[2*i+2] = (*data & 0xFF00)>>8;
+ block_data[2*i+3] = *data++ & 0x00FF;
+ }
+ if((ret = i2c_master_send(client, block_data,len*2+2))<0){
+ printk("AD7142: I2C write error\n");
+ return ret;
+ }
+ } else
+ printk("AD7142: i2c bus doesn't support raw I2C operation\n");
+ return ret;
+}
+
+static int
+ad7142_i2c_read(struct i2c_client *client,
+ unsigned short offset,
+ unsigned short *data,
+ unsigned int len)
+{
+ int ret = -1;
+ int i;
+
+ if(len<1 && len>16){
+ printk("AD7142: read data length error\n");
+ return ret;
+ }
+ /* the adv7142 has an autoincrement function, use it if
+ * the adapter understands raw I2C */
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ /* do raw I2C, not smbus compatible */
+ u8 block_data[32];
+
+ block_data[0] = (offset & 0xFF00)>>8;
+ block_data[1] = (offset & 0x00FF);
+ if((ret = i2c_master_send(client, block_data, 2))<0){
+ printk("AD7142: I2C read error\n");
+ return ret;
+ }
+ if((ret = i2c_master_recv(client, block_data, len*2)) < 0){
+ printk("AD7142: I2C transfer error\n");
+ return ret;
+ }
+ for(i=0;i<len;i++){
+ unsigned short temp;
+ temp = block_data[2*i];
+ temp = (temp<<8) & 0xFF00;
+ *data++ = temp | block_data[2*i+1];
+ }
+ } else
+ printk("AD7142: i2c bus doesn't support raw I2C operation\n");
+ return ret;
+}
+
+static int
+ad7142_attach (struct i2c_adapter *adap)
+{
+ return i2c_probe(adap, &addr_data, &ad7142_probe);
+}
+
+static int
+ad7142_detach_client (struct i2c_client *client)
+{
+ int rc;
+ if ((rc = i2c_detach_client (client)) == 0)
+ kfree (i2c_get_clientdata (client));
+ return rc;
+}
+
+static struct i2c_driver ad7142_driver = {
+ .driver = {
+ .name = AD7142_DRV_NAME,
+ },
+ .id = AD7142_I2C_ID,
+ .attach_adapter = ad7142_attach,
+ .detach_client = ad7142_detach_client,
+};
+
+unsigned short old_status_low=0,old_status_high=0;
+
+static void ad7142_decode(void)
+{
+ unsigned short irqno_low=0,irqno_high=0;
+ unsigned short temp;
+
+ ad7142_i2c_read(ad7142_client,INTSTAT_REG0,&irqno_low,1);
+ temp = irqno_low ^ old_status_low;
+ switch(temp){
+ case 0x0001: input_report_key(ad7142_dev, BTN_BASE, irqno_low&0x0001);
+ old_status_low = irqno_low;
+ break;
+ case 0x0002: input_report_key(ad7142_dev, BTN_BASE4, (irqno_low&0x0002)>>1);
+ old_status_low = irqno_low;
+ break;
+ case 0x0004: input_report_key(ad7142_dev, KEY_UP, (irqno_low&0x0004)>>2);
+ old_status_low = irqno_low;
+ break;
+ case 0x0008: input_report_key(ad7142_dev, KEY_RIGHT, (irqno_low&0x0008)>>3);
+ old_status_low = irqno_low;
+ break;
+ }
+ ad7142_i2c_read(ad7142_client,INTSTAT_REG1,&irqno_high,1);
+ temp = irqno_high ^ old_status_high;
+ switch(temp){
+ case 0x0001: input_report_key(ad7142_dev, BTN_BASE2, irqno_high&0x0001);
+ old_status_high = irqno_high;
+ break;
+ case 0x0002: input_report_key(ad7142_dev, BTN_BASE3, (irqno_high&0x0002)>>1);
+ old_status_high = irqno_high;
+ break;
+ case 0x0004: input_report_key(ad7142_dev, KEY_DOWN, (irqno_high&0x0004)>>2);
+ old_status_high = irqno_high;
+ break;
+ case 0x0008: input_report_key(ad7142_dev, KEY_LEFT, (irqno_high&0x0008)>>3);
+ old_status_high = irqno_high;
+ break;
+ }
+ input_sync(ad7142_dev);
+}
+
+
+static int intr_flag = 0;
+static int ad7142_thread(void *nothing)
+{
+ do {
+ wait_event_interruptible(ad7142_wait, kthread_should_stop() || (intr_flag!=0));
+ ad7142_decode();
+ intr_flag = 0;
+ enable_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX);
+ } while (!kthread_should_stop());
+ printk(KERN_DEBUG "ad7142: kthread exiting\n");
+ return 0;
+}
+
+static irqreturn_t ad7142_interrupt(int irq, void *dummy, struct pt_regs *fp)
+{
+ disable_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX);
+ intr_flag = 1;
+ wake_up_interruptible(&ad7142_wait);
+ return IRQ_HANDLED;
+}
+
+static int ad7142_open(struct input_dev *dev)
+{
+ int *used = dev->private;
+ unsigned short id,value;
+ ad7142_i2c_read(ad7142_client, DEVID, &id, 1);
+ if(id != AD7142_I2C_ID){
+ printk(KERN_ERR "Open AD7142 error\n");
+ return -ENODEV;
+ }
+ if ((*used)++)
+ return 0;
+
+ if (request_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX, ad7142_interrupt, \
+ IRQF_TRIGGER_LOW, "ad7142_joy", ad7142_interrupt)) {
+ (*used)--;
+ printk(KERN_ERR "ad7142.c: Can't allocate irq %d\n",CONFIG_BFIN_JOYSTICK_IRQ_PFX);
+ return -EBUSY;
+ }
+
+
+ ad7142_i2c_write(ad7142_client,STAGE0_CONNECTION,stage[0],8);
+ ad7142_i2c_write(ad7142_client,STAGE1_CONNECTION,stage[1],8);
+ ad7142_i2c_write(ad7142_client,STAGE2_CONNECTION,stage[2],8);
+ ad7142_i2c_write(ad7142_client,STAGE3_CONNECTION,stage[3],8);
+ ad7142_i2c_write(ad7142_client,STAGE4_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE5_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE6_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE7_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE8_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE9_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE10_CONNECTION,stage[4],8);
+ ad7142_i2c_write(ad7142_client,STAGE11_CONNECTION,stage[4],8);
+
+ value = 0x00B0;
+ ad7142_i2c_write(ad7142_client,PWRCONVCTL,&value,1);
+
+ value = 0x0690;
+ ad7142_i2c_write(ad7142_client,AMBCOMPCTL_REG1,&value,1);
+
+ value = 0x0664;
+ ad7142_i2c_write(ad7142_client,AMBCOMPCTL_REG2,&value,1);
+
+ value = 0x290F;
+ ad7142_i2c_write(ad7142_client,AMBCOMPCTL_REG3,&value,1);
+
+ value = 0x000F;
+ ad7142_i2c_write(ad7142_client,INTEN_REG0,&value,1);
+ ad7142_i2c_write(ad7142_client,INTEN_REG1,&value,1);
+
+ value = 0x0000;
+ ad7142_i2c_write(ad7142_client,INTEN_REG2,&value,1);
+
+ ad7142_i2c_read(ad7142_client,AMBCOMPCTL_REG1,&value,1);
+
+ value = 0x000F;
+ ad7142_i2c_write(ad7142_client,AMBCOMPCTL_REG0,&value,1);
+
+ ad7142_task = kthread_run(ad7142_thread, NULL, "ad7142_task");
+ if (IS_ERR(ad7142_task)) {
+ printk(KERN_ERR "serio: Failed to start kseriod\n");
+ return PTR_ERR(ad7142_task);
+ }
+ return 0;
+}
+
+static void ad7142_close(struct input_dev *dev)
+{
+ int *used = dev->private;
+
+ if (!--(*used))
+ free_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX, ad7142_interrupt);
+ kthread_stop(ad7142_task);
+}
+
+static int __init ad7142_init(void)
+{
+ ad7142_dev = input_allocate_device();
+ if(!ad7142_dev)
+ return -ENOMEM;
+ ad7142_dev->open = ad7142_open;
+ ad7142_dev->close = ad7142_close;
+ ad7142_dev->evbit[0] = BIT(EV_KEY);
+ ad7142_dev->keybit[LONG(BTN_BASE)] = BIT(BTN_BASE) | BIT(BTN_BASE2) | BIT(BTN_BASE3) | BIT(BTN_BASE4);
+ ad7142_dev->keybit[LONG(KEY_UP)] |= BIT(KEY_UP) | BIT(KEY_DOWN) | BIT(KEY_LEFT) | BIT(KEY_RIGHT);
+
+ ad7142_dev->name = ad7142_name;
+ ad7142_dev->phys = ad7142_phys;
+ ad7142_dev->id.bustype = BUS_I2C;
+ ad7142_dev->id.vendor = 0x0001;
+ ad7142_dev->id.product = 0x0001;
+ ad7142_dev->id.version = 0x0100;
+
+ ad7142_dev->private = &ad7142_used;
+
+ input_register_device(ad7142_dev);
+ i2c_add_driver (&ad7142_driver);
+
+ return 0;
+}
+
+static void __exit ad7142_exit(void)
+{
+ i2c_del_driver (&ad7142_driver);
+ input_unregister_device(ad7142_dev);
+}
+
+module_init(ad7142_init);
+module_exit(ad7142_exit);
--
1.5.3.4
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