diff options
Diffstat (limited to 'packages/linux/gumstix-kernel-2.6.21/tsc2003.c')
| -rw-r--r-- | packages/linux/gumstix-kernel-2.6.21/tsc2003.c | 424 |
1 files changed, 0 insertions, 424 deletions
diff --git a/packages/linux/gumstix-kernel-2.6.21/tsc2003.c b/packages/linux/gumstix-kernel-2.6.21/tsc2003.c deleted file mode 100644 index 8836537b77..0000000000 --- a/packages/linux/gumstix-kernel-2.6.21/tsc2003.c +++ /dev/null @@ -1,424 +0,0 @@ -/* - * linux/drivers/i2c/chips/tsc2003.c - * - * Copyright (C) 2005 Bill Gatliff <bgat at billgatliff.com> - * Changes for 2.6.20 kernel by Nicholas Chen <nchen at cs.umd.edu> - * Changes to poll for events rather than use penirq by - * Chris Dollar <chris.dollar at gmail.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * Driver for TI's TSC2003 I2C Touch Screen Controller - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/string.h> -#include <linux/bcd.h> -#include <linux/list.h> -#include <linux/device.h> -#include <linux/input.h> -#include <linux/delay.h> - -#define DRIVER_NAME "tsc2003" -#define TSC2003_CMD(cn,pdn,m) (((cn) << 4) | ((pdn) << 2) | ((m) << 1)) -#define ADC_MAX ((1 << 12) - 1) - -//#define CONFIG_I2C_DEBUG_CHIP 1 - -static unsigned short normal_i2c[] = { 0x48, I2C_CLIENT_END }; - -I2C_CLIENT_INSMOD_1(tsc2003); - -enum tsc2003_pd { - PD_POWERDOWN = 0, - PD_IREFOFF_ADCON = 1, - PD_IREFON_ADCOFF = 2, - PD_IREFON_ADCON = 3, - PD_PENIRQ_ARM = PD_IREFON_ADCOFF, - PD_PENIRQ_DISARM = PD_IREFON_ADCON, -}; - -enum tsc2003_m { - M_12BIT = 0, - M_8BIT = 1 -}; - -enum tsc2003_cmd { - MEAS_TEMP0 = 0, - MEAS_VBAT1 = 1, - MEAS_IN1 = 2, - MEAS_TEMP1 = 4, - MEAS_VBAT2 = 5, - MEAS_IN2 = 6, - ACTIVATE_NX_DRIVERS = 8, - ACTIVATE_NY_DRIVERS = 9, - ACTIVATE_YNX_DRIVERS = 10, - MEAS_XPOS = 12, - MEAS_YPOS = 13, - MEAS_Z1POS = 14, - MEAS_Z2POS = 15 -}; - -struct tsc2003_data { - struct i2c_client client; - struct device_driver driver; - struct input_dev *idev; - struct task_struct *tstask; - struct completion tstask_completion; - enum tsc2003_pd pd; - enum tsc2003_m m; - int vbat1; - int vbat2; - int temp0; - int temp1; - int in1; - int in2; -}; - -static int tsc2003_i2c_detect(struct i2c_adapter *adapter, int address, - int kind); - -static int tsc2003_read(struct tsc2003_data *data, enum tsc2003_cmd cmd, - enum tsc2003_pd pd, int *val) -{ - char c; - char d[2]; - int ret; - - c = TSC2003_CMD(cmd, pd, data->m); - ret = i2c_master_send(&data->client, &c, 1); - if (ret <= 0) - goto err; - - udelay(20); - ret = - i2c_master_recv(&data->client, d, data->m == M_12BIT ? 2 : 1); - if (ret <= 0) - goto err; - - if (val) { - *val = d[0]; - *val <<= 4; - if (data->m == M_12BIT) - *val += (d[1] >> 4); - } -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_ERR "%s: val[%x] = %d\n", - __FUNCTION__, cmd, (((int) d[0]) << 8) + d[1]); -#endif - - return 0; - err:if (!ret) - ret = -ENODEV; - return ret; -} - -static inline int tsc2003_read_temp0(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_TEMP0, pd, t); -} - -static inline int tsc2003_read_temp1(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_TEMP1, pd, t); -} - -static inline int tsc2003_read_xpos(struct tsc2003_data *d, enum - tsc2003_pd pd, int *x) -{ - return tsc2003_read(d, MEAS_XPOS, pd, x); -} - -static inline int tsc2003_read_ypos(struct tsc2003_data *d, enum - tsc2003_pd pd, int *y) -{ - return tsc2003_read(d, MEAS_YPOS, pd, y); -} - -static inline int tsc2003_read_pressure(struct tsc2003_data *d, enum - tsc2003_pd pd, int *p) -{ - return tsc2003_read(d, MEAS_Z1POS, pd, p); -} - -static inline int tsc2003_read_in1(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_IN1, pd, t); -} - -static inline int tsc2003_read_in2(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_IN2, pd, t); -} - -static inline int tsc2003_read_vbat1(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_VBAT1, pd, t); -} - -static inline int tsc2003_read_vbat2(struct tsc2003_data *d, enum - tsc2003_pd pd, int *t) -{ - return tsc2003_read(d, MEAS_VBAT2, pd, t); -} - -static inline int tsc2003_powerdown(struct tsc2003_data *d) -{ - /* we don't have a distinct powerdown command, - so do a benign read with the PD bits cleared */ - return tsc2003_read(d, MEAS_IN1, PD_POWERDOWN, 0); -} - -void tsc2003_init_client(struct i2c_client *client) -{ - struct tsc2003_data *data = i2c_get_clientdata(client); - - data->pd = PD_PENIRQ_DISARM; - data->m = M_8BIT; - return; -} - -static int tsc2003ts_thread(void *v) -{ - struct tsc2003_data *d = v; - struct task_struct *tsk = current; - - d->tstask = tsk; - - daemonize(DRIVER_NAME "tsd"); - allow_signal(SIGKILL); - - complete(&d->tstask_completion); - -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_INFO "%s: address 0x%x\n", - __FUNCTION__, d->client.addr); -#endif - - do { - unsigned int x, y, p; - int pen_is_up = 0; - - d->pd = PD_PENIRQ_DISARM; - tsc2003_read_xpos(d, PD_PENIRQ_DISARM, &x); - tsc2003_read_ypos(d, PD_PENIRQ_DISARM, &y); - tsc2003_read_pressure(d, PD_PENIRQ_DISARM, &p); - - if (p < 64) { - p = 0; - } -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_INFO "TSD X: %d Y: %d P: %d\n", x, y, p); -#endif - - if (!pen_is_up) { - input_report_abs(d->idev, ABS_X, 4096 - x); - input_report_abs(d->idev, ABS_Y, 4096 - y); - input_report_abs(d->idev, ABS_PRESSURE, p); - input_sync(d->idev); - } - - if (p == 0) { -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_INFO "No pressure - pen is up!\n"); -#endif - pen_is_up = 1; - } else { -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_INFO - "Pen is still down - sleeping and will re-sample!\n"); -#endif - pen_is_up = 0; - } - - // sleep for 3 jiffies to give us about 30 updates/sec - msleep(3); - - } while (!signal_pending(tsk)); - - d->tstask = NULL; - complete_and_exit(&d->tstask_completion, 0); -} - -static int tsc2003_idev_open(struct input_dev *idev) -{ - struct tsc2003_data *d = idev->private; - int ret = 0; - - if (d->tstask) - panic(DRIVER_NAME "tsd already running (!). abort."); - - ret = kernel_thread(tsc2003ts_thread, d, CLONE_KERNEL); - if (ret >= 0) { - wait_for_completion(&d->tstask_completion); - ret = 0; - } - - return ret; -} - -static void tsc2003_idev_close(struct input_dev *idev) -{ - struct tsc2003_data *d = idev->private; - if (d->tstask) { - send_sig(SIGKILL, d->tstask, 1); - wait_for_completion(&d->tstask_completion); - } - - return; -} - -static int tsc2003_driver_register(struct tsc2003_data *data) -{ - struct input_dev *idev; - int ret = 0; - - init_completion(&data->tstask_completion); - - idev = input_allocate_device(); - data->idev = idev; - - idev->private = data; - idev->name = DRIVER_NAME; - idev->evbit[0] = BIT(EV_ABS); - idev->open = tsc2003_idev_open; - idev->close = tsc2003_idev_close; - idev->absbit[LONG(ABS_X)] = BIT(ABS_X); - idev->absbit[LONG(ABS_Y)] = BIT(ABS_Y); - idev->absbit[LONG(ABS_PRESSURE)] = BIT(ABS_PRESSURE); - input_set_abs_params(idev, ABS_X, 0, ADC_MAX, 0, 0); - input_set_abs_params(idev, ABS_Y, 0, ADC_MAX, 0, 0); - input_set_abs_params(idev, ABS_PRESSURE, 0, 0, 0, 0); - - if (!ret) { - input_register_device(idev); - printk(KERN_INFO "tsc2003 - registering input device\n"); - } - - return ret; -} - -static int tsc2003_i2c_attach_adapter(struct i2c_adapter *adapter) -{ - printk(KERN_INFO "tsc2003 i2c touch screen controller\n"); -#if defined(CONFIG_I2C_DEBUG_CHIP) - printk(KERN_INFO "Bill Gatliff <bgat at billgatliff.com\n"); - printk(KERN_INFO "Nicholas Chen <nchen at cs.umd.edu>\n"); -#endif - return i2c_probe(adapter, &addr_data, tsc2003_i2c_detect); -} - -static int tsc2003_i2c_detach_client(struct i2c_client *client) -{ - int err; - struct tsc2003_data *d = i2c_get_clientdata(client); - - input_unregister_device(d->idev); - - if ((err = i2c_detach_client(client))) { - dev_err(&client->dev, "Client deregistration failed, " - "client not detached.\n"); - return err; - } - - return 0; -} - -static struct i2c_driver tsc2003_driver = { - .driver = { - .owner = THIS_MODULE, - .name = DRIVER_NAME, - }, - .attach_adapter = tsc2003_i2c_attach_adapter, - .detach_client = tsc2003_i2c_detach_client, -}; - -static int tsc2003_i2c_detect(struct i2c_adapter *adapter, int address, - int kind) -{ - struct i2c_client *new_client; - struct tsc2003_data *data; - - int err = 0; - const char *name = ""; - - if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA - | I2C_FUNC_I2C | - I2C_FUNC_SMBUS_WORD_DATA)) - goto exit; - - data = kcalloc(1, sizeof(*data), GFP_KERNEL); - if (!data) { - err = -ENOMEM; - goto exit; - } - - new_client = &data->client; - i2c_set_clientdata(new_client, data); - new_client->addr = address; - new_client->adapter = adapter; - new_client->driver = &tsc2003_driver; - new_client->flags = 0; - - /* TODO: I'm pretty sure I'm not dealing with kind correctly */ - if (kind == 0 /* identification */ || kind < 0 /* detection */ ) - kind = tsc2003; - - if (kind == tsc2003) - name = DRIVER_NAME; - - /* try a command, see if we get an ack; - if we do, assume it's our device */ - printk(KERN_INFO "%s: probing address 0x%x\n", - __FUNCTION__, address); - err = tsc2003_powerdown(data); - if (err >= 0) { - strlcpy(new_client->name, name, I2C_NAME_SIZE); - err = i2c_attach_client(new_client); - if (err) - goto exit_free; - - tsc2003_init_client(new_client); - - err = tsc2003_driver_register(data); - if (err < 0) - goto exit_free; - - printk(KERN_INFO "%s: device address 0x%x attached.\n", - __FUNCTION__, address); - return 0; - } - /* failure to detect when everything else is ok isn't an error */ - else - err = 0; - - exit_free:kfree(new_client); - exit:return err; -} - -static int __init tsc2003_init(void) -{ - return i2c_add_driver(&tsc2003_driver); -} - -static void __exit tsc2003_exit(void) -{ - i2c_del_driver(&tsc2003_driver); -} - -MODULE_AUTHOR("Bill Gatliff <bgat at billgatliff.com>"); -MODULE_DESCRIPTION("TSC2003 Touch Screen Controller driver"); -MODULE_LICENSE("GPL"); - -module_init(tsc2003_init); -module_exit(tsc2003_exit); |