Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 380 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/corgi_ts.c b/drivers/input/touchscreen/corgi_ts.c
new file mode 100644
index 000000000000..3f8b61cfbc37
--- /dev/null
+++ b/drivers/input/touchscreen/corgi_ts.c
@@ -0,0 +1,380 @@
+/*
+ *  Touchscreen driver for Sharp Corgi models (SL-C7xx)
+ *
+ *  Copyright (c) 2004-2005 Richard Purdie
+ *
+ *  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.
+ *
+ */
+
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <asm/irq.h>
+
+#include <asm/arch/corgi.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/pxa-regs.h>
+
+
+#define PWR_MODE_ACTIVE         0
+#define PWR_MODE_SUSPEND        1
+
+#define X_AXIS_MAX              3830
+#define X_AXIS_MIN              150
+#define Y_AXIS_MAX              3830
+#define Y_AXIS_MIN              190
+#define PRESSURE_MIN            0
+#define PRESSURE_MAX            15000
+
+struct ts_event {
+        short pressure;
+        short x;
+        short y;
+};
+
+struct corgi_ts {
+        char phys[32];
+        struct input_dev input;
+        struct timer_list timer;
+        struct ts_event tc;
+        int pendown;
+        int power_mode;
+};
+
+#define STATUS_HSYNC            (GPLR(CORGI_GPIO_HSYNC) & GPIO_bit(CORGI_GPIO_HSYNC))
+
+#define SyncHS()        while((STATUS_HSYNC) == 0); while((STATUS_HSYNC) != 0);
+#define CCNT(a)         asm volatile ("mrc p14, 0, %0, C1, C0, 0" : "=r"(a))
+#define CCNT_ON()       {int pmnc = 1; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
+#define CCNT_OFF()      {int pmnc = 0; asm volatile ("mcr p14, 0, %0, C0, C0, 0" : : "r"(pmnc));}
+
+#define WAIT_HS_400_VGA         7013U   // 17.615us
+#define WAIT_HS_400_QVGA        16622U  // 41.750us
+
+
+/* ADS7846 Touch Screen Controller bit definitions */
+#define ADSCTRL_PD0             (1u << 0)       /* PD0 */
+#define ADSCTRL_PD1             (1u << 1)       /* PD1 */
+#define ADSCTRL_DFR             (1u << 2)       /* SER/DFR */
+#define ADSCTRL_MOD             (1u << 3)       /* Mode */
+#define ADSCTRL_ADR_SH  4       /* Address setting */
+#define ADSCTRL_STS             (1u << 7)       /* Start Bit */
+
+/* External Functions */
+extern int w100fb_get_xres(void);
+extern int w100fb_get_blanking(void);
+extern int w100fb_get_fastsysclk(void);
+extern unsigned int get_clk_frequency_khz(int info);
+
+static unsigned long calc_waittime(void)
+{
+        int w100fb_xres = w100fb_get_xres();
+        unsigned int waittime = 0;
+
+        if (w100fb_xres == 480 || w100fb_xres == 640) {
+                waittime = WAIT_HS_400_VGA * get_clk_frequency_khz(0) / 398131U;
+
+                if (w100fb_get_fastsysclk() == 100)
+                        waittime = waittime * 75 / 100;
+
+                if (w100fb_xres == 640)
+                        waittime *= 3;
+
+                return waittime;
+        }
+
+        return WAIT_HS_400_QVGA * get_clk_frequency_khz(0) / 398131U;
+}
+
+static int sync_receive_data_send_cmd(int doRecive, int doSend, unsigned int address, unsigned long wait_time)
+{
+        int pos = 0;
+        unsigned long timer1 = 0, timer2;
+        int dosleep;
+
+        dosleep = !w100fb_get_blanking();
+
+        if (dosleep && doSend) {
+                CCNT_ON();
+                /* polling HSync */
+                SyncHS();
+                /* get CCNT */
+                CCNT(timer1);
+        }
+
+        if (doRecive)
+                pos = corgi_ssp_ads7846_get();
+
+        if (doSend) {
+                int cmd = ADSCTRL_PD0 | ADSCTRL_PD1 | (address << ADSCTRL_ADR_SH) | ADSCTRL_STS;
+                /* dummy command */
+                corgi_ssp_ads7846_put(cmd);
+                corgi_ssp_ads7846_get();
+
+                if (dosleep) {
+                        /* Wait after HSync */
+                        CCNT(timer2);
+                        if (timer2-timer1 > wait_time) {
+                                /* timeout */
+                                SyncHS();
+                                /* get OSCR */
+                                CCNT(timer1);
+                                /* Wait after HSync */
+                                CCNT(timer2);
+                        }
+                        while (timer2 - timer1 < wait_time)
+                                CCNT(timer2);
+                }
+                corgi_ssp_ads7846_put(cmd);
+                if (dosleep)
+                        CCNT_OFF();
+        }
+        return pos;
+}
+
+static int read_xydata(struct corgi_ts *corgi_ts)
+{
+        unsigned int x, y, z1, z2;
+        unsigned long flags, wait_time;
+
+        /* critical section */
+        local_irq_save(flags);
+        corgi_ssp_ads7846_lock();
+        wait_time=calc_waittime();
+
+        /* Y-axis */
+        sync_receive_data_send_cmd(0, 1, 1u, wait_time);
+
+        /* Y-axis */
+        sync_receive_data_send_cmd(1, 1, 1u, wait_time);
+
+        /* X-axis */
+        y = sync_receive_data_send_cmd(1, 1, 5u, wait_time);
+
+        /* Z1 */
+        x = sync_receive_data_send_cmd(1, 1, 3u, wait_time);
+
+        /* Z2 */
+        z1 = sync_receive_data_send_cmd(1, 1, 4u, wait_time);
+        z2 = sync_receive_data_send_cmd(1, 0, 4u, wait_time);
+
+        /* Power-Down Enable */
+        corgi_ssp_ads7846_put((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        corgi_ssp_ads7846_get();
+
+        corgi_ssp_ads7846_unlock();
+        local_irq_restore(flags);
+
+        if (x== 0 || y == 0 || z1 == 0 || (x * (z2 - z1) / z1) >= 15000) {
+                corgi_ts->tc.pressure = 0;
+                return 0;
+        }
+
+        corgi_ts->tc.x = x;
+        corgi_ts->tc.y = y;
+        corgi_ts->tc.pressure = (x * (z2 - z1)) / z1;
+        return 1;
+}
+
+static void new_data(struct corgi_ts *corgi_ts, struct pt_regs *regs)
+{
+        if (corgi_ts->power_mode != PWR_MODE_ACTIVE)
+                return;
+
+        if (!corgi_ts->tc.pressure && corgi_ts->pendown == 0)
+                return;
+
+        if (regs)
+                input_regs(&corgi_ts->input, regs);
+
+        input_report_abs(&corgi_ts->input, ABS_X, corgi_ts->tc.x);
+        input_report_abs(&corgi_ts->input, ABS_Y, corgi_ts->tc.y);
+        input_report_abs(&corgi_ts->input, ABS_PRESSURE, corgi_ts->tc.pressure);
+        input_report_key(&corgi_ts->input, BTN_TOUCH, (corgi_ts->pendown != 0));
+        input_sync(&corgi_ts->input);
+}
+
+static void ts_interrupt_main(struct corgi_ts *corgi_ts, int isTimer, struct pt_regs *regs)
+{
+        if ((GPLR(CORGI_GPIO_TP_INT) & GPIO_bit(CORGI_GPIO_TP_INT)) == 0) {
+                /* Disable Interrupt */
+                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_NOEDGE);
+                if (read_xydata(corgi_ts)) {
+                        corgi_ts->pendown = 1;
+                        new_data(corgi_ts, regs);
+                }
+                mod_timer(&corgi_ts->timer, jiffies + HZ / 100);
+        } else {
+                if (corgi_ts->pendown == 1 || corgi_ts->pendown == 2) {
+                        mod_timer(&corgi_ts->timer, jiffies + HZ / 100);
+                        corgi_ts->pendown++;
+                        return;
+                }
+
+                if (corgi_ts->pendown) {
+                        corgi_ts->tc.pressure = 0;
+                        new_data(corgi_ts, regs);
+                }
+
+                /* Enable Falling Edge */
+                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+                corgi_ts->pendown = 0;
+        }
+}
+
+static void corgi_ts_timer(unsigned long data)
+{
+        struct corgi_ts *corgits_data = (struct corgi_ts *) data;
+        ts_interrupt_main(corgits_data, 1, NULL);
+}
+
+static irqreturn_t ts_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct corgi_ts *corgits_data = dev_id;
+        ts_interrupt_main(corgits_data, 0, regs);
+        return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PM
+static int corgits_suspend(struct device *dev, uint32_t state, uint32_t level)
+{
+        if (level == SUSPEND_POWER_DOWN) {
+                struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
+
+                if (corgi_ts->pendown) {
+                        del_timer_sync(&corgi_ts->timer);
+                        corgi_ts->tc.pressure = 0;
+                        new_data(corgi_ts, NULL);
+                        corgi_ts->pendown = 0;
+                }
+                corgi_ts->power_mode = PWR_MODE_SUSPEND;
+
+                corgi_ssp_ads7846_putget((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        }
+        return 0;
+}
+
+static int corgits_resume(struct device *dev, uint32_t level)
+{
+        if (level == RESUME_POWER_ON) {
+                struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
+
+                corgi_ssp_ads7846_putget((4u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+                /* Enable Falling Edge */
+                set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+                corgi_ts->power_mode = PWR_MODE_ACTIVE;
+        }
+        return 0;
+}
+#else
+#define corgits_suspend         NULL
+#define corgits_resume          NULL
+#endif
+
+static int __init corgits_probe(struct device *dev)
+{
+        struct corgi_ts *corgi_ts;
+
+        if (!(corgi_ts = kmalloc(sizeof(struct corgi_ts), GFP_KERNEL)))
+                return -ENOMEM;
+
+        dev_set_drvdata(dev, corgi_ts);
+
+        memset(corgi_ts, 0, sizeof(struct corgi_ts));
+
+        init_input_dev(&corgi_ts->input);
+        corgi_ts->input.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+        corgi_ts->input.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
+        input_set_abs_params(&corgi_ts->input, ABS_X, X_AXIS_MIN, X_AXIS_MAX, 0, 0);
+        input_set_abs_params(&corgi_ts->input, ABS_Y, Y_AXIS_MIN, Y_AXIS_MAX, 0, 0);
+        input_set_abs_params(&corgi_ts->input, ABS_PRESSURE, PRESSURE_MIN, PRESSURE_MAX, 0, 0);
+
+        strcpy(corgi_ts->phys, "corgits/input0");
+
+        corgi_ts->input.private = corgi_ts;
+        corgi_ts->input.name = "Corgi Touchscreen";
+        corgi_ts->input.dev = dev;
+        corgi_ts->input.phys = corgi_ts->phys;
+        corgi_ts->input.id.bustype = BUS_HOST;
+        corgi_ts->input.id.vendor = 0x0001;
+        corgi_ts->input.id.product = 0x0002;
+        corgi_ts->input.id.version = 0x0100;
+
+        pxa_gpio_mode(CORGI_GPIO_TP_INT | GPIO_IN);
+        pxa_gpio_mode(CORGI_GPIO_HSYNC | GPIO_IN);
+
+        /* Initiaize ADS7846 Difference Reference mode */
+        corgi_ssp_ads7846_putget((1u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        mdelay(5);
+        corgi_ssp_ads7846_putget((3u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        mdelay(5);
+        corgi_ssp_ads7846_putget((4u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        mdelay(5);
+        corgi_ssp_ads7846_putget((5u << ADSCTRL_ADR_SH) | ADSCTRL_STS);
+        mdelay(5);
+
+        init_timer(&corgi_ts->timer);
+        corgi_ts->timer.data = (unsigned long) corgi_ts;
+        corgi_ts->timer.function = corgi_ts_timer;
+
+        input_register_device(&corgi_ts->input);
+        corgi_ts->power_mode = PWR_MODE_ACTIVE;
+
+        if (request_irq(CORGI_IRQ_GPIO_TP_INT, ts_interrupt, SA_INTERRUPT, "ts", corgi_ts)) {
+                input_unregister_device(&corgi_ts->input);
+                kfree(corgi_ts);
+                return -EBUSY;
+        }
+
+        /* Enable Falling Edge */
+        set_irq_type(CORGI_IRQ_GPIO_TP_INT, IRQT_FALLING);
+
+        printk(KERN_INFO "input: Corgi Touchscreen Registered\n");
+
+        return 0;
+}
+
+static int corgits_remove(struct device *dev)
+{
+        struct corgi_ts *corgi_ts = dev_get_drvdata(dev);
+
+        free_irq(CORGI_IRQ_GPIO_TP_INT, NULL);
+        del_timer_sync(&corgi_ts->timer);
+        input_unregister_device(&corgi_ts->input);
+        kfree(corgi_ts);
+        return 0;
+}
+
+static struct device_driver corgits_driver = {
+        .name           = "corgi-ts",
+        .bus            = &platform_bus_type,
+        .probe          = corgits_probe,
+        .remove         = corgits_remove,
+        .suspend        = corgits_suspend,
+        .resume         = corgits_resume,
+};
+
+static int __devinit corgits_init(void)
+{
+        return driver_register(&corgits_driver);
+}
+
+static void __exit corgits_exit(void)
+{
+        driver_unregister(&corgits_driver);
+}
+
+module_init(corgits_init);
+module_exit(corgits_exit);
+
+MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
+MODULE_DESCRIPTION("Corgi TouchScreen Driver");
+MODULE_LICENSE("GPL");