]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
Input: add support for trackball on pxa930 and pxa935
authorYong Yao <yaoyong@marvell.com>
Mon, 29 Dec 2008 11:59:59 +0000 (03:59 -0800)
committerDmitry Torokhov <dmitry.torokhov@gmail.com>
Mon, 29 Dec 2008 12:58:58 +0000 (04:58 -0800)
Signed-off-by: Yong Yao <yaoyong@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
arch/arm/mach-pxa/include/mach/pxa930_trkball.h [new file with mode: 0644]
drivers/input/mouse/Kconfig
drivers/input/mouse/Makefile
drivers/input/mouse/pxa930_trkball.c [new file with mode: 0644]

diff --git a/arch/arm/mach-pxa/include/mach/pxa930_trkball.h b/arch/arm/mach-pxa/include/mach/pxa930_trkball.h
new file mode 100644 (file)
index 0000000..5e0789b
--- /dev/null
@@ -0,0 +1,10 @@
+#ifndef __ASM_ARCH_PXA930_TRKBALL_H
+#define __ASM_ARCH_PXA930_TRKBALL_H
+
+struct pxa930_trkball_platform_data {
+       int x_filter;
+       int y_filter;
+};
+
+#endif /* __ASM_ARCH_PXA930_TRKBALL_H */
+
index 4e993425977558b4a79d408f023149d6b492339c..093c8c1bca746b651a4c18ab260931a02dac5dae 100644 (file)
@@ -286,4 +286,10 @@ config MOUSE_GPIO
          To compile this driver as a module, choose M here: the
          module will be called gpio_mouse.
 
+config MOUSE_PXA930_TRKBALL
+       tristate "PXA930 Trackball mouse"
+       depends on CPU_PXA930 || CPU_PXA935
+       help
+         Say Y here to support PXA930 Trackball mouse.
+
 endif
index 96f1dd8037f8dfa19562e8d7a200321b6e3c02d5..8c8a1f236e28cded7f6ade983da64c90445aa999 100644 (file)
@@ -4,19 +4,20 @@
 
 # Each configuration option enables a list of files.
 
-obj-$(CONFIG_MOUSE_AMIGA)      += amimouse.o
-obj-$(CONFIG_MOUSE_APPLETOUCH) += appletouch.o
-obj-$(CONFIG_MOUSE_BCM5974)    += bcm5974.o
-obj-$(CONFIG_MOUSE_ATARI)      += atarimouse.o
-obj-$(CONFIG_MOUSE_RISCPC)     += rpcmouse.o
-obj-$(CONFIG_MOUSE_INPORT)     += inport.o
-obj-$(CONFIG_MOUSE_LOGIBM)     += logibm.o
-obj-$(CONFIG_MOUSE_PC110PAD)   += pc110pad.o
-obj-$(CONFIG_MOUSE_PS2)                += psmouse.o
-obj-$(CONFIG_MOUSE_SERIAL)     += sermouse.o
-obj-$(CONFIG_MOUSE_HIL)                += hil_ptr.o
-obj-$(CONFIG_MOUSE_VSXXXAA)    += vsxxxaa.o
-obj-$(CONFIG_MOUSE_GPIO)       += gpio_mouse.o
+obj-$(CONFIG_MOUSE_AMIGA)              += amimouse.o
+obj-$(CONFIG_MOUSE_APPLETOUCH)         += appletouch.o
+obj-$(CONFIG_MOUSE_BCM5974)            += bcm5974.o
+obj-$(CONFIG_MOUSE_ATARI)              += atarimouse.o
+obj-$(CONFIG_MOUSE_RISCPC)             += rpcmouse.o
+obj-$(CONFIG_MOUSE_INPORT)             += inport.o
+obj-$(CONFIG_MOUSE_LOGIBM)             += logibm.o
+obj-$(CONFIG_MOUSE_PC110PAD)           += pc110pad.o
+obj-$(CONFIG_MOUSE_PS2)                        += psmouse.o
+obj-$(CONFIG_MOUSE_PXA930_TRKBALL)     += pxa930_trkball.o
+obj-$(CONFIG_MOUSE_SERIAL)             += sermouse.o
+obj-$(CONFIG_MOUSE_HIL)                        += hil_ptr.o
+obj-$(CONFIG_MOUSE_VSXXXAA)            += vsxxxaa.o
+obj-$(CONFIG_MOUSE_GPIO)               += gpio_mouse.o
 
 psmouse-objs := psmouse-base.o synaptics.o
 
diff --git a/drivers/input/mouse/pxa930_trkball.c b/drivers/input/mouse/pxa930_trkball.c
new file mode 100644 (file)
index 0000000..a0f45c4
--- /dev/null
@@ -0,0 +1,269 @@
+/*
+ * PXA930 track ball mouse driver
+ *
+ * Copyright (C) 2007 Marvell International Ltd.
+ * 2008-02-28: Yong Yao <yaoyong@marvell.com>
+ *             initial version
+ *
+ *  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/init.h>
+#include <linux/input.h>
+#include <linux/version.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+
+#include <mach/hardware.h>
+#include <mach/pxa930_trkball.h>
+
+/* Trackball Controller Register Definitions */
+#define TBCR           (0x000C)
+#define TBCNTR         (0x0010)
+#define TBSBC          (0x0014)
+
+#define TBCR_TBRST     (1 << 1)
+#define TBCR_TBSB      (1 << 10)
+
+#define TBCR_Y_FLT(n)  (((n) & 0xf) << 6)
+#define TBCR_X_FLT(n)  (((n) & 0xf) << 2)
+
+#define TBCNTR_YM(n)   (((n) >> 24) & 0xff)
+#define TBCNTR_YP(n)   (((n) >> 16) & 0xff)
+#define TBCNTR_XM(n)   (((n) >> 8) & 0xff)
+#define TBCNTR_XP(n)   ((n) & 0xff)
+
+#define TBSBC_TBSBC    (0x1)
+
+struct pxa930_trkball {
+       struct pxa930_trkball_platform_data *pdata;
+
+       /* Memory Mapped Register */
+       struct resource *mem;
+       void __iomem *mmio_base;
+
+       struct input_dev *input;
+};
+
+static irqreturn_t pxa930_trkball_interrupt(int irq, void *dev_id)
+{
+       struct pxa930_trkball *trkball = dev_id;
+       struct input_dev *input = trkball->input;
+       int tbcntr, x, y;
+
+       /* According to the spec software must read TBCNTR twice:
+        * if the read value is the same, the reading is valid
+        */
+       tbcntr = __raw_readl(trkball->mmio_base + TBCNTR);
+
+       if (tbcntr == __raw_readl(trkball->mmio_base + TBCNTR)) {
+               x = (TBCNTR_XP(tbcntr) - TBCNTR_XM(tbcntr)) / 2;
+               y = (TBCNTR_YP(tbcntr) - TBCNTR_YM(tbcntr)) / 2;
+
+               input_report_rel(input, REL_X, x);
+               input_report_rel(input, REL_Y, y);
+               input_sync(input);
+       }
+
+       __raw_writel(TBSBC_TBSBC, trkball->mmio_base + TBSBC);
+       __raw_writel(0, trkball->mmio_base + TBSBC);
+
+       return IRQ_HANDLED;
+}
+
+/* For TBCR, we need to wait for a while to make sure it has been modified. */
+static int write_tbcr(struct pxa930_trkball *trkball, int v)
+{
+       int i = 100;
+
+       __raw_writel(v, trkball->mmio_base + TBCR);
+
+       while (i--) {
+               if (__raw_readl(trkball->mmio_base + TBCR) == v)
+                       break;
+               msleep(1);
+       }
+
+       if (i == 0) {
+               pr_err("%s: timed out writing TBCR(%x)!\n", __func__, v);
+               return -ETIMEDOUT;
+       }
+
+       return 0;
+}
+
+static void pxa930_trkball_config(struct pxa930_trkball *trkball)
+{
+       uint32_t tbcr;
+
+       /* According to spec, need to write the filters of x,y to 0xf first! */
+       tbcr = __raw_readl(trkball->mmio_base + TBCR);
+       write_tbcr(trkball, tbcr | TBCR_X_FLT(0xf) | TBCR_Y_FLT(0xf));
+       write_tbcr(trkball, TBCR_X_FLT(trkball->pdata->x_filter) |
+                           TBCR_Y_FLT(trkball->pdata->y_filter));
+
+       /* According to spec, set TBCR_TBRST first, before clearing it! */
+       tbcr = __raw_readl(trkball->mmio_base + TBCR);
+       write_tbcr(trkball, tbcr | TBCR_TBRST);
+       write_tbcr(trkball, tbcr & ~TBCR_TBRST);
+
+       __raw_writel(TBSBC_TBSBC, trkball->mmio_base + TBSBC);
+       __raw_writel(0, trkball->mmio_base + TBSBC);
+
+       pr_debug("%s: final TBCR=%x!\n", __func__,
+                __raw_readl(trkball->mmio_base + TBCR));
+}
+
+static int pxa930_trkball_open(struct input_dev *dev)
+{
+       struct pxa930_trkball *trkball = input_get_drvdata(dev);
+
+       pxa930_trkball_config(trkball);
+
+       return 0;
+}
+
+static void pxa930_trkball_disable(struct pxa930_trkball *trkball)
+{
+       uint32_t tbcr = __raw_readl(trkball->mmio_base + TBCR);
+
+       /* Held in reset, gate the 32-KHz input clock off */
+       write_tbcr(trkball, tbcr | TBCR_TBRST);
+}
+
+static void pxa930_trkball_close(struct input_dev *dev)
+{
+       struct pxa930_trkball *trkball = input_get_drvdata(dev);
+
+       pxa930_trkball_disable(trkball);
+}
+
+static int __devinit pxa930_trkball_probe(struct platform_device *pdev)
+{
+       struct pxa930_trkball *trkball;
+       struct input_dev *input;
+       struct resource *res;
+       int irq, error;
+
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_err(&pdev->dev, "failed to get trkball irq\n");
+               return -ENXIO;
+       }
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               dev_err(&pdev->dev, "failed to get register memory\n");
+               return -ENXIO;
+       }
+
+       trkball = kzalloc(sizeof(struct pxa930_trkball), GFP_KERNEL);
+       if (!trkball)
+               return -ENOMEM;
+
+       trkball->pdata = pdev->dev.platform_data;
+       if (!trkball->pdata) {
+               dev_err(&pdev->dev, "no platform data defined\n");
+               error = -EINVAL;
+               goto failed;
+       }
+
+       trkball->mmio_base = ioremap_nocache(res->start, resource_size(res));
+       if (!trkball->mmio_base) {
+               dev_err(&pdev->dev, "failed to ioremap registers\n");
+               error = -ENXIO;
+               goto failed;
+       }
+
+       /* held the module in reset, will be enabled in open() */
+       pxa930_trkball_disable(trkball);
+
+       error = request_irq(irq, pxa930_trkball_interrupt, IRQF_DISABLED,
+                           pdev->name, trkball);
+       if (error) {
+               dev_err(&pdev->dev, "failed to request irq: %d\n", ret);
+               goto failed_free_io;
+       }
+
+       platform_set_drvdata(pdev, trkball);
+
+       input = input_allocate_device();
+       if (!input) {
+               dev_err(&pdev->dev, "failed to allocate input device\n");
+               error = -ENOMEM;
+               goto failed_free_irq;
+       }
+
+       input->name = pdev->name;
+       input->id.bustype = BUS_HOST;
+       input->open = pxa930_trkball_open;
+       input->close = pxa930_trkball_close;
+       input->dev.parent = &pdev->dev;
+       input_set_drvdata(input, trkball);
+
+       trkball->input = input;
+
+       input_set_capability(input, EV_REL, REL_X);
+       input_set_capability(input, EV_REL, REL_Y);
+
+       error = input_register_device(input);
+       if (error) {
+               dev_err(&pdev->dev, "unable to register input device\n");
+               goto failed_free_input;
+       }
+
+       return 0;
+
+failed_free_input:
+       input_free_device(input);
+failed_free_irq:
+       free_irq(irq, trkball);
+failed_free_io:
+       iounmap(trkball->mmio_base);
+failed:
+       kfree(trkball);
+       return ret;
+}
+
+static int __devexit pxa930_trkball_remove(struct platform_device *pdev)
+{
+       struct pxa930_trkball *trkball = platform_get_drvdata(pdev);
+       int irq = platform_get_irq(pdev, 0);
+
+       input_unregister_device(trkball->input);
+       free_irq(irq, trkball);
+       iounmap(trkball->mmio_base);
+       kfree(trkball);
+
+       return 0;
+}
+
+static struct platform_driver pxa930_trkball_driver = {
+       .driver         = {
+               .name   = "pxa930-trkball",
+       },
+       .probe          = pxa930_trkball_probe,
+       .remove         = __devexit_p(pxa930_trkball_remove),
+};
+
+static int __init pxa930_trkball_init(void)
+{
+       return platform_driver_register(&pxa930_trkball_driver);
+}
+
+static void __exit pxa930_trkball_exit(void)
+{
+       platform_driver_unregister(&pxa930_trkball_driver);
+}
+
+module_init(pxa930_trkball_init);
+module_exit(pxa930_trkball_exit);
+
+MODULE_AUTHOR("Yong Yao <yaoyong@marvell.com>");
+MODULE_DESCRIPTION("PXA930 Trackball Mouse Driver");
+MODULE_LICENSE("GPL");