handheld computer. See <http://www.hp.com/jornada/products/720>
for details.
+config SA1100_JORNADA720_SSP
+ bool "HP Jornada 720 Extended SSP driver"
+ select SA1100_SSP
+ depends on SA1100_JORNADA720
+ help
+ Say Y here if you have a HP Jornada 7xx handheld computer and you
+ want to access devices connected to the MCU. Those include the
+ keyboard, touchscreen, backlight and battery. This driver also activates
+ the generic SSP which it extends.
+
config SA1100_HACKKIT
bool "HackKit Core CPU Board"
help
help
Say Y here to enable support for the generic PIO SSP driver.
This isn't for audio support, but for attached sensors and
- other devices, eg for BadgePAD 4 sensor support, or Jornada
- 720 touchscreen support.
+ other devices, eg for BadgePAD 4 sensor support.
config H3600_SLEEVE
tristate "Compaq iPAQ Handheld sleeve support"
--- /dev/null
+/**
+ * arch/arm/mac-sa1100/jornada720_ssp.c
+ *
+ * Copyright (C) 2006/2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
+ * Copyright (C) 2006 Filip Zyzniewski <filip.zyzniewski@tefnet.pl>
+ *
+ * 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.
+ *
+ * SSP driver for the HP Jornada 710/720/728
+ */
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <asm/hardware.h>
+#include <asm/hardware/ssp.h>
+#include <asm/arch/jornada720.h>
+
+static DEFINE_SPINLOCK(jornada_ssp_lock);
+static unsigned long jornada_ssp_flags;
+
+/**
+ * jornada_ssp_reverse - reverses input byte
+ *
+ * we need to reverse all data we recieve from the mcu due to its physical location
+ * returns : 01110111 -> 11101110
+ */
+u8 inline jornada_ssp_reverse(u8 byte)
+{
+ return
+ ((0x80 & byte) >> 7) |
+ ((0x40 & byte) >> 5) |
+ ((0x20 & byte) >> 3) |
+ ((0x10 & byte) >> 1) |
+ ((0x08 & byte) << 1) |
+ ((0x04 & byte) << 3) |
+ ((0x02 & byte) << 5) |
+ ((0x01 & byte) << 7);
+};
+EXPORT_SYMBOL(jornada_ssp_reverse);
+
+/**
+ * jornada_ssp_byte - waits for ready ssp bus and sends byte
+ *
+ * waits for fifo buffer to clear and then transmits, if it doesn't then we will
+ * timeout after <timeout> rounds. Needs mcu running before its called.
+ *
+ * returns : %mcu output on success
+ * : %-ETIMEOUT on timeout
+ */
+int jornada_ssp_byte(u8 byte)
+{
+ int timeout = 400000;
+ u16 ret;
+
+ while ((GPLR & GPIO_GPIO10)) {
+ if (!--timeout) {
+ printk(KERN_WARNING "SSP: timeout while waiting for transmit\n");
+ return -ETIMEDOUT;
+ }
+ cpu_relax();
+ }
+
+ ret = jornada_ssp_reverse(byte) << 8;
+
+ ssp_write_word(ret);
+ ssp_read_word(&ret);
+
+ return jornada_ssp_reverse(ret);
+};
+EXPORT_SYMBOL(jornada_ssp_byte);
+
+/**
+ * jornada_ssp_inout - decide if input is command or trading byte
+ *
+ * returns : (jornada_ssp_byte(byte)) on success
+ * : %-ETIMEOUT on timeout failure
+ */
+int jornada_ssp_inout(u8 byte)
+{
+ int ret, i;
+
+ /* true means command byte */
+ if (byte != TXDUMMY) {
+ ret = jornada_ssp_byte(byte);
+ /* Proper return to commands is TxDummy */
+ if (ret != TXDUMMY) {
+ for (i = 0; i < 256; i++)/* flushing bus */
+ if (jornada_ssp_byte(TXDUMMY) == -1)
+ break;
+ return -ETIMEDOUT;
+ }
+ } else /* Exchange TxDummy for data */
+ ret = jornada_ssp_byte(TXDUMMY);
+
+ return ret;
+};
+EXPORT_SYMBOL(jornada_ssp_inout);
+
+/**
+ * jornada_ssp_start - enable mcu
+ *
+ */
+int jornada_ssp_start()
+{
+ spin_lock_irqsave(&jornada_ssp_lock, jornada_ssp_flags);
+ GPCR = GPIO_GPIO25;
+ udelay(50);
+ return 0;
+};
+EXPORT_SYMBOL(jornada_ssp_start);
+
+/**
+ * jornada_ssp_end - disable mcu and turn off lock
+ *
+ */
+int jornada_ssp_end()
+{
+ GPSR = GPIO_GPIO25;
+ spin_unlock_irqrestore(&jornada_ssp_lock, jornada_ssp_flags);
+ return 0;
+};
+EXPORT_SYMBOL(jornada_ssp_end);
+
+static int __init jornada_ssp_probe(struct platform_device *dev)
+{
+ int ret;
+
+ GPSR = GPIO_GPIO25;
+
+ ret = ssp_init();
+
+ /* worked fine, lets not bother with anything else */
+ if (!ret) {
+ printk(KERN_INFO "SSP: device initialized with irq\n");
+ return ret;
+ }
+
+ printk(KERN_WARNING "SSP: initialization failed, trying non-irq solution \n");
+
+ /* init of Serial 4 port */
+ Ser4MCCR0 = 0;
+ Ser4SSCR0 = 0x0387;
+ Ser4SSCR1 = 0x18;
+
+ /* clear out any left over data */
+ ssp_flush();
+
+ /* enable MCU */
+ jornada_ssp_start();
+
+ /* see if return value makes sense */
+ ret = jornada_ssp_inout(GETBRIGHTNESS);
+
+ /* seems like it worked, just feed it with TxDummy to get rid of data */
+ if (ret == TxDummy)
+ jornada_ssp_inout(TXDUMMY);
+
+ jornada_ssp_end();
+
+ /* failed, lets just kill everything */
+ if (ret == -ETIMEDOUT) {
+ printk(KERN_WARNING "SSP: attempts failed, bailing\n");
+ ssp_exit();
+ return -ENODEV;
+ }
+
+ /* all fine */
+ printk(KERN_INFO "SSP: device initialized\n");
+ return 0;
+};
+
+static int jornada_ssp_remove(struct platform_device *dev)
+{
+ /* Note that this doesnt actually remove the driver, since theres nothing to remove
+ * It just makes sure everything is turned off */
+ GPSR = GPIO_GPIO25;
+ ssp_exit();
+ return 0;
+};
+
+struct platform_driver jornadassp_driver = {
+ .probe = jornada_ssp_probe,
+ .remove = jornada_ssp_remove,
+ .driver = {
+ .name = "jornada_ssp",
+ },
+};
+
+static int __init jornada_ssp_init(void)
+{
+ return platform_driver_register(&jornadassp_driver);
+}
--- /dev/null
+/*
+ * include/asm-arm/arch-sa1100/jornada720.h
+ *
+ * This file contains SSP/MCU communication definitions for HP Jornada 710/720/728
+ *
+ * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com>
+ * Copyright (C) 2000 John Ankcorn <jca@lcs.mit.edu>
+ *
+ * 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.
+ *
+ */
+
+ /* HP Jornada 7xx microprocessor commands */
+#define GETBATTERYDATA 0xc0
+#define GETSCANKEYCODE 0x90
+#define GETTOUCHSAMPLES 0xa0
+#define GETCONTRAST 0xD0
+#define SETCONTRAST 0xD1
+#define GETBRIGHTNESS 0xD2
+#define SETBRIGHTNESS 0xD3
+#define CONTRASTOFF 0xD8
+#define BRIGHTNESSOFF 0xD9
+#define PWMOFF 0xDF
+#define TXDUMMY 0x11
+#define ERRORCODE 0x00
projects / mv-sheeva.git / commitdiff