Re: [patch] ucb1x00: touchscreen cleanups
From: Mark Underwood
Date: Tue Jul 26 2005 - 03:06:06 EST
Hi Pavel,
I am in the process of porting Linux 2.6.11.5 to the
Helio PDA (MIPS R3912 based) and if I remember
correctly it is using a UCB1x00 (or Toshiba clone).
Please could you make sure your patches will work
across arch. Now I have my kernel up and running (well
mainly falling :-() my next task is to get write the
frame buffer driver and then look at the UCB1x00 as I
need it for sound and touch screen. So in a day or two
I will start to try to integrate your work into my
kernel.
Best Regards,
Mark
--- Pavel Machek <pavel@xxxxxx> wrote:
> These are small ucb1x00-ts cleanups, as suggested by
> Vojtech, Dmitri
> and the lists.
>
> Signed-off-by: Pavel Machek <pavel@xxxxxxx>
>
> Cleanups suggested by Dmitri, Vojtech and lists.
>
> ---
> commit 79c98a2279c45098d102ba69ecf940c00da3dfee
> tree f15a3d27de9a84694f4588374a5e383938866a54
> parent 080578bff89927c0f5aeddd588bc2f5f7373f232
> author <pavel@amd.(none)> Tue, 26 Jul 2005 09:44:33
> +0200
> committer <pavel@amd.(none)> Tue, 26 Jul 2005
> 09:44:33 +0200
>
> drivers/misc/ucb1x00-ts.c | 87
> ++++++++++++---------------------------------
> 1 files changed, 23 insertions(+), 64 deletions(-)
>
> diff --git a/drivers/misc/ucb1x00-ts.c
> b/drivers/misc/ucb1x00-ts.c
> --- a/drivers/misc/ucb1x00-ts.c
> +++ b/drivers/misc/ucb1x00-ts.c
> @@ -1,7 +1,8 @@
> /*
> - * linux/drivers/misc/ucb1x00-ts.c
> + * Touchscreen driver for UCB1x00-based
> touchscreens
> *
> * Copyright (C) 2001 Russell King, All Rights
> Reserved.
> + * Copyright (C) 2005 Pavel Machek
> *
> * 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
> @@ -30,6 +31,7 @@
> #include <linux/device.h>
> #include <linux/suspend.h>
> #include <linux/slab.h>
> +#include <linux/kthread.h>
>
> #include <asm/dma.h>
> #include <asm/semaphore.h>
> @@ -42,10 +44,7 @@ struct ucb1x00_ts {
> struct ucb1x00 *ucb;
>
> wait_queue_head_t irq_wait;
> - struct semaphore sem;
> - struct completion init_exit;
> struct task_struct *rtask;
> - int use_count;
> u16 x_res;
> u16 y_res;
>
> @@ -55,20 +54,6 @@ struct ucb1x00_ts {
>
> static int adcsync;
>
> -static inline void ucb1x00_ts_evt_add(struct
> ucb1x00_ts *ts, u16 pressure, u16 x, u16 y)
> -{
> - input_report_abs(&ts->idev, ABS_X, x);
> - input_report_abs(&ts->idev, ABS_Y, y);
> - input_report_abs(&ts->idev, ABS_PRESSURE,
> pressure);
> - input_sync(&ts->idev);
> -}
> -
> -static inline void ucb1x00_ts_event_release(struct
> ucb1x00_ts *ts)
> -{
> - input_report_abs(&ts->idev, ABS_PRESSURE, 0);
> - input_sync(&ts->idev);
> -}
> -
> /*
> * Switch to interrupt mode.
> */
> @@ -176,12 +161,6 @@ static int ucb1x00_thread(void
> *_ts)
> DECLARE_WAITQUEUE(wait, tsk);
> int valid;
>
> - ts->rtask = tsk;
> -
> - daemonize("ktsd");
> - /* only want to receive SIGKILL */
> - allow_signal(SIGKILL);
> -
> /*
> * We could run as a real-time thread. However,
> thus far
> * this doesn't seem to be necessary.
> @@ -189,12 +168,10 @@ static int ucb1x00_thread(void
> *_ts)
> // tsk->policy = SCHED_FIFO;
> // tsk->rt_priority = 1;
>
> - complete(&ts->init_exit);
> -
> valid = 0;
>
> add_wait_queue(&ts->irq_wait, &wait);
> - for (;;) {
> + while (!kthread_should_stop()) {
> unsigned int x, y, p, val;
> signed long timeout;
>
> @@ -212,10 +189,7 @@ static int ucb1x00_thread(void
> *_ts)
> ucb1x00_ts_mode_int(ts);
> ucb1x00_adc_disable(ts->ucb);
>
> - set_task_state(tsk, TASK_UNINTERRUPTIBLE);
> - schedule_timeout(HZ / 100);
> - if (signal_pending(tsk))
> - break;
> + msleep(10);
>
> ucb1x00_enable(ts->ucb);
> val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR);
> @@ -231,7 +205,8 @@ static int ucb1x00_thread(void
> *_ts)
> * spit out a "pen off" sample here.
> */
> if (valid) {
> - ucb1x00_ts_event_release(ts);
> + input_report_abs(&ts->idev, ABS_PRESSURE, 0);
> + input_sync(&ts->idev);
> valid = 0;
> }
>
> @@ -245,7 +220,10 @@ static int ucb1x00_thread(void
> *_ts)
> * to do any filtering they please.
> */
> if (!ts->restart) {
> - ucb1x00_ts_evt_add(ts, p, x, y);
> + input_report_abs(&ts->idev, ABS_X, x);
> + input_report_abs(&ts->idev, ABS_Y, y);
> + input_report_abs(&ts->idev, ABS_PRESSURE, p);
> + input_sync(&ts->idev);
> valid = 1;
> }
>
> @@ -256,14 +234,12 @@ static int ucb1x00_thread(void
> *_ts)
> try_to_freeze();
>
> schedule_timeout(timeout);
> - if (signal_pending(tsk))
> - break;
> }
>
> remove_wait_queue(&ts->irq_wait, &wait);
>
> ts->rtask = NULL;
> - complete_and_exit(&ts->init_exit, 0);
> + return 0;
> }
>
> /*
> @@ -282,14 +258,7 @@ static int
> ucb1x00_ts_open(struct input_
> struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev;
> int ret = 0;
>
> - if (down_interruptible(&ts->sem))
> - return -EINTR;
> -
> - if (ts->use_count++ != 0)
> - goto out;
> -
> - if (ts->rtask)
> - panic("ucb1x00: rtask running?");
> + BUG_ON(ts->rtask);
>
> init_waitqueue_head(&ts->irq_wait);
> ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX,
> ucb1x00_ts_irq, ts);
> @@ -305,19 +274,16 @@ static int
> ucb1x00_ts_open(struct input_
> ts->y_res = ucb1x00_ts_read_yres(ts);
> ucb1x00_adc_disable(ts->ucb);
>
> - init_completion(&ts->init_exit);
> - ret = kernel_thread(ucb1x00_thread, ts,
> CLONE_KERNEL);
> - if (ret >= 0) {
> - wait_for_completion(&ts->init_exit);
> + ts->rtask = kthread_run(ucb1x00_thread, ts,
> "ktsd");
> + if (!IS_ERR(ts->rtask)) {
> ret = 0;
> } else {
> ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts);
> + ts->rtask = NULL;
>
=== message truncated ===
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