On 285, 10 12, 2007 at 03:38:47PM +0800, Bryan Wu wrote: > Subject: [PATCH try #2] Input/Joystick Driver: add support AD7142 joystick driver > > [try #2] Changelog: > - Coding style issues fixed, passed checkpatch.pl > - Kill uselss "ad7142_used" > - Move request_irq to probe > - Move i2c_check_functionality to probe > - Error handling added > > Signed-off-by: Bryan Wu <[email protected]> > --- > drivers/input/joystick/Kconfig | 16 ++ > drivers/input/joystick/Makefile | 1 + > drivers/input/joystick/ad7142.c | 485 +++++++++++++++++++++++++++++++++++++++ > 3 files changed, 502 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..c31e639 > --- /dev/null > +++ b/drivers/input/joystick/ad7142.c > @@ -0,0 +1,485 @@ > +/* > + * File: drivers/input/joystick/ad7142.c > + * Based on: drivers/input/joystick/amijoy.c > + * Original Author: Aubrey Li > + * Maintained by: Bryan Wu <[email protected]> > + * > + * Created: Apr 7th, 2006 > + * Description: > + * > + * Modified: > + * Copyright 2005-2007 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 <linux/uaccess.h> > +#include <linux/irq.h> > + > +#include <asm/blackfin.h> > + > +MODULE_AUTHOR("Aubrey Li, Bryan Wu <[email protected]>"); > +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 struct input_dev *ad7142_dev; > + > +#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 > + */ > +/* RW Power & conversion control */ > +#define PWRCONVCTL 0x00 > + > +/* RW Ambient compensation control register 0 - 3 */ > +#define AMBCOMPCTL_REG0 0x01 > +#define AMBCOMPCTL_REG1 0x02 > +#define AMBCOMPCTL_REG2 0x03 > +#define AMBCOMPCTL_REG3 0x04 > + > +/* RW Interrupt enable register 0 - 2 */ > +#define INTEN_REG0 0x05 > +#define INTEN_REG1 0x06 > +#define INTEN_REG2 0x07 > + > +/* R Low limit interrupt status register 0 */ > +#define INTSTAT_REG0 0x08 > +/* R High limit interrupt status register 1 */ > +#define INTSTAT_REG1 0x09 > +/* R Interrupt status register 2 */ > +#define INTSTAT_REG2 0x0A > + > +/* R ADC stage 0 - 11 result (uncompensated) actually located in SRAM */ > +#define ADCRESULT_S0 0x0B > +#define ADCRESULT_S1 0x0C > +#define ADCRESULT_S2 0x0D > +#define ADCRESULT_S3 0x0E > +#define ADCRESULT_S4 0x0F > +#define ADCRESULT_S5 0x10 > +#define ADCRESULT_S6 0x11 > +#define ADCRESULT_S7 0x12 > +#define ADCRESULT_S8 0x13 > +#define ADCRESULT_S9 0x14 > +#define ADCRESULT_S10 0x15 > +#define ADCRESULT_S11 0x16 > + > +/* R I.D. Register */ > +#define DEVID 0x17 > + > +/* R Current threshold status register 0, 1 */ > +#define THRES_STAT_REG0 0x40 > +#define THRES_STAT_REG1 0x41 > +/* R Current proximity status register 2 */ > +#define PROX_STAT_REG 0x42 > + > +#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 int intr_flag; > + > +static struct i2c_client_address_data addr_data = { > + .normal_i2c = normal_addr, > + .probe = ignore, > + .ignore = ignore, > +}; > + > +static irqreturn_t ad7142_interrupt(int irq, void *dummy) > +{ > + disable_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX); > + intr_flag = 1; > + wake_up_interruptible(&ad7142_wait); > + return IRQ_HANDLED; > +} > + > +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; > + > + rc = i2c_attach_client(client); > + if (rc) { > + printk(KERN_ERR "i2c_attach_client fail: %d\n", rc); > + goto fail_attach; > + } > + > + /* > + * The ADV7142 has an autoincrement function, > + * use it if the adapter understands raw I2C > + */ > + rc = i2c_check_functionality(client->adapter, I2C_FUNC_I2C); > + if (!rc) { > + printk(KERN_ERR > + "AD7142: i2c bus doesn't support raw I2C operation\n"); > + rc = -EINVAL; > + goto fail_check; > + } > + > + rc = request_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX, ad7142_interrupt, > + IRQF_TRIGGER_LOW, "ad7142_joy", ad7142_interrupt); > + if (rc) { > + printk(KERN_ERR "AD7142: Can't allocate irq %d\n", > + CONFIG_BFIN_JOYSTICK_IRQ_PFX); > + rc = -EBUSY; This assignment is bogus, you can simply use value returned by request_irq() > + goto fail_check; > + } > + > + ad7142_client = client; > + printk(KERN_INFO "%s_attach: at 0x%02x\n", > + client->name, client->addr << 1); > + return 0; > + > +fail_check: > + i2c_detach_client(client); > +fail_attach: > + kfree(client); > + return rc; > +} > + > +static int ad7142_i2c_write(struct i2c_client *client, unsigned short offset, > + unsigned short *data, unsigned int len) > +{ > + int ret = -1; > + int i; > + u8 block_data[34]; > + > + if (len < 1 || len > 16) { > + printk(KERN_ERR "AD7142: Write data length error\n"); > + return ret; > + } > + > + /* Do raw I2C, not smbus compatible */ > + 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; > + } > + > + ret = i2c_master_send(client, block_data, (len * 2 + 2)); > + if (ret < 0) { > + printk(KERN_ERR "AD7142: I2C write error\n"); > + return ret; > + } > + > + 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; > + u8 block_data[32]; > + > + if (len < 1 && len > 16) { > + printk(KERN_ERR "AD7142: read data length error\n"); > + return ret; > + } > + > + /* Do raw I2C, not smbus compatible */ > + block_data[0] = (offset & 0xFF00) >> 8; > + block_data[1] = (offset & 0x00FF); > + > + ret = i2c_master_send(client, block_data, 2); > + if (ret < 0) { > + printk(KERN_ERR "AD7142: I2C read error\n"); > + return ret; > + } > + > + ret = i2c_master_recv(client, block_data, len * 2); > + if (ret < 0) { > + printk(KERN_ERR "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]; > + } > + > + 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; > + > + rc = i2c_detach_client(client); > + if (!rc) > + 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, old_status_high; Are these variables used outside of your driver ? > + > +static void ad7142_decode(void) > +{ > + unsigned short irqno_low, irqno_high; > + 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)); > + break; > + case 0x0002: > + input_report_key(ad7142_dev, BTN_BASE4, > + ((irqno_low & 0x0002) >> 1)); > + break; > + case 0x0004: > + input_report_key(ad7142_dev, KEY_UP, > + ((irqno_low & 0x0004) >> 2)); > + break; > + case 0x0008: > + input_report_key(ad7142_dev, KEY_RIGHT, > + ((irqno_low & 0x0008) >> 3)); > + break; > + } > + old_status_low = irqno_low; > + > + 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); > + break; > + case 0x0002: > + input_report_key(ad7142_dev, BTN_BASE3, > + ((irqno_high & 0x0002) >> 1)); > + break; > + case 0x0004: > + input_report_key(ad7142_dev, KEY_DOWN, > + ((irqno_high & 0x0004) >> 2)); > + break; > + case 0x0008: > + input_report_key(ad7142_dev, KEY_LEFT, > + ((irqno_high & 0x0008) >> 3)); > + break; > + } > + old_status_high = irqno_high; > + > + input_sync(ad7142_dev); > +} > + > +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()); > + > + pr_debug("ad7142: kthread exiting\n"); > + > + return 0; > +} > + > +static int ad7142_open(struct input_dev *dev) > +{ > + 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; > + } > + > + 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) > +{ > + free_irq(CONFIG_BFIN_JOYSTICK_IRQ_PFX, ad7142_interrupt); > + kthread_stop(ad7142_task); > +} > + > +static int __init ad7142_init(void) > +{ > + int ret; > + > + 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 joystick"; > + ad7142_dev->phys = "ad7142/input0"; > + ad7142_dev->id.bustype = BUS_I2C; > + ad7142_dev->id.vendor = 0x0001; > + ad7142_dev->id.product = 0x0001; > + ad7142_dev->id.version = 0x0100; > + > + ret = input_register_device(ad7142_dev); > + if (ret) { > + printk(KERN_ERR "Failed to register AD7142 input device!\n"); > + goto fail_register; > + } > + > + ret = i2c_add_driver(&ad7142_driver); > + if (ret) { > + printk(KERN_ERR "Failed to add AD7142 I2C driver!\n"); > + goto fail_add; > + } > + return 0; > + > +fail_add: > + input_unregister_device(ad7142_dev); > +fail_register: > + input_free_device(ad7142_dev); > + return ret; > +} > + > +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 > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- Andrey Panin | Linux and UNIX system administrator [email protected] | PGP key: wwwkeys.pgp.net
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