1 files changed, 0 insertions, 515 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/power/hdq.c b/target/linux/s3c24xx/files-2.6.30/drivers/power/hdq.c
deleted file mode 100644
index f03fabfb1..000000000
--- a/target/linux/s3c24xx/files-2.6.30/drivers/power/hdq.c
+++ /dev/null
@@ -1,515 +0,0 @@
-/*
- * HDQ generic GPIO bitbang driver using FIQ
- *
- * (C) 2006-2007 by Openmoko, Inc.
- * Author: Andy Green <andy@openmoko.com>
- * All rights reserved.
- *
- * 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/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/platform_device.h>
-#include <linux/hdq.h>
-
-#define HDQ_READ 0
-#define HDQ_WRITE 0x80
-
-enum hdq_bitbang_states {
-	HDQB_IDLE = 0,
-	HDQB_TX_BREAK,
-	HDQB_TX_BREAK_RECOVERY,
-	HDQB_ADS_CALC,
-	HDQB_ADS_LOW,
-	HDQB_ADS_HIGH,
-	HDQB_WAIT_RX,
-	HDQB_DATA_RX_LOW,
-	HDQB_DATA_RX_HIGH,
-	HDQB_WAIT_TX,
-};
-
-static struct hdq_priv {
-	u8 hdq_probed; /* nonzero after HDQ driver probed */
-	struct mutex hdq_lock; /* if you want to use hdq, you have to take lock */
-	unsigned long hdq_gpio_pin; /* GTA02 = GPD14 which pin to meddle with */
-	u8 hdq_ads; /* b7..b6 = register address, b0 = r/w */
-	u8 hdq_tx_data; /* data to tx for write action */
-	u8 hdq_rx_data; /* data received in read action */
-	u8 hdq_request_ctr; /* incremented by "user" to request a transfer */
-	u8 hdq_transaction_ctr; /* incremented after each transfer */
-	u8 hdq_error; /* 0 = no error */
-	u8 hdq_ctr;
-	u8 hdq_ctr2;
-	u8 hdq_bit;
-	u8 hdq_shifter;
-	u8 hdq_tx_data_done;
-	enum hdq_bitbang_states hdq_state;
-	int reported_error;
-
-	struct hdq_platform_data *pdata;
-} hdq_priv;
-
-
-static void hdq_bad(void)
-{
-	if (!hdq_priv.reported_error)
-		printk(KERN_ERR "HDQ error: %d\n", hdq_priv.hdq_error);
-	hdq_priv.reported_error = 1;
-}
-
-static void hdq_good(void)
-{
-	if (hdq_priv.reported_error)
-		printk(KERN_INFO "HDQ responds again\n");
-	hdq_priv.reported_error = 0;
-}
-
-int hdq_fiq_handler(void)
-{
-	if (!hdq_priv.hdq_probed)
-		return 0;
-
-	switch (hdq_priv.hdq_state) {
-	case HDQB_IDLE:
-		if (hdq_priv.hdq_request_ctr == hdq_priv.hdq_transaction_ctr)
-			break;
-		hdq_priv.hdq_ctr = 250 / HDQ_SAMPLE_PERIOD_US;
-		hdq_priv.pdata->gpio_set(0);
-		hdq_priv.pdata->gpio_dir_out();
-		hdq_priv.hdq_tx_data_done = 0;
-		hdq_priv.hdq_state = HDQB_TX_BREAK;
-		break;
-
-	case HDQB_TX_BREAK: /* issue low for > 190us */
-		if (--hdq_priv.hdq_ctr == 0) {
-			hdq_priv.hdq_ctr = 60 / HDQ_SAMPLE_PERIOD_US;
-			hdq_priv.hdq_state = HDQB_TX_BREAK_RECOVERY;
-			hdq_priv.pdata->gpio_set(1);
-		}
-		break;
-
-	case HDQB_TX_BREAK_RECOVERY: /* issue low for > 40us */
-		if (--hdq_priv.hdq_ctr)
-			break;
-		hdq_priv.hdq_shifter = hdq_priv.hdq_ads;
-		hdq_priv.hdq_bit = 8; /* 8 bits of ads / rw */
-		hdq_priv.hdq_tx_data_done = 0; /* doing ads */
-		/* fallthru on last one */
-	case HDQB_ADS_CALC:
-		if (hdq_priv.hdq_shifter & 1)
-			hdq_priv.hdq_ctr = 50 / HDQ_SAMPLE_PERIOD_US;
-		else
-			hdq_priv.hdq_ctr = 120 / HDQ_SAMPLE_PERIOD_US;
-		/* carefully precompute the other phase length */
-		hdq_priv.hdq_ctr2 = (210 - (hdq_priv.hdq_ctr * HDQ_SAMPLE_PERIOD_US)) /
-				HDQ_SAMPLE_PERIOD_US;
-		hdq_priv.hdq_state = HDQB_ADS_LOW;
-		hdq_priv.hdq_shifter >>= 1;
-		hdq_priv.hdq_bit--;
-		hdq_priv.pdata->gpio_set(0);
-		break;
-
-	case HDQB_ADS_LOW:
-		if (--hdq_priv.hdq_ctr)
-			break;
-		hdq_priv.pdata->gpio_set(1);
-		hdq_priv.hdq_state = HDQB_ADS_HIGH;
-		break;
-
-	case HDQB_ADS_HIGH:
-		if (--hdq_priv.hdq_ctr2 > 1) /* account for HDQB_ADS_CALC */
-			break;
-		if (hdq_priv.hdq_bit) { /* more bits to do */
-			hdq_priv.hdq_state = HDQB_ADS_CALC;
-			break;
-		}
-		/* no more bits, wait it out until hdq_priv.hdq_ctr2 exhausted */
-		if (hdq_priv.hdq_ctr2)
-			break;
-		/* ok no more bits and very last state */
-		hdq_priv.hdq_ctr = 60 / HDQ_SAMPLE_PERIOD_US;
-		/* FIXME 0 = read */
-		if (hdq_priv.hdq_ads & 0x80) { /* write the byte out */
-			 /* set delay before payload */
-			hdq_priv.hdq_ctr = 300 / HDQ_SAMPLE_PERIOD_US;
- 			/* already high, no need to write */
-			hdq_priv.hdq_state = HDQB_WAIT_TX;
-			break;
-		}
-		/* read the next byte */
-		hdq_priv.hdq_bit = 8; /* 8 bits of data */
-		hdq_priv.hdq_ctr = 2500 / HDQ_SAMPLE_PERIOD_US;
-		hdq_priv.hdq_state = HDQB_WAIT_RX;
-		hdq_priv.pdata->gpio_dir_in();
-		break;
-
-	case HDQB_WAIT_TX: /* issue low for > 40us */
-		if (--hdq_priv.hdq_ctr)
-			break;
-		if (!hdq_priv.hdq_tx_data_done) { /* was that the data sent? */
-			hdq_priv.hdq_tx_data_done++;
-			hdq_priv.hdq_shifter = hdq_priv.hdq_tx_data;
-			hdq_priv.hdq_bit = 8; /* 8 bits of data */
-			hdq_priv.hdq_state = HDQB_ADS_CALC; /* start sending */
-			break;
-		}
-		hdq_priv.hdq_error = 0;
-		hdq_priv.hdq_transaction_ctr = hdq_priv.hdq_request_ctr;
-		hdq_priv.hdq_state = HDQB_IDLE; /* all tx is done */
-		/* idle in input mode, it's pulled up by 10K */
-		hdq_priv.pdata->gpio_dir_in();
-		break;
-
-	case HDQB_WAIT_RX: /* wait for battery to talk to us */
-		if (hdq_priv.pdata->gpio_get() == 0) {
-			/* it talks to us! */
-			hdq_priv.hdq_ctr2 = 1;
-			hdq_priv.hdq_bit = 8; /* 8 bits of data */
-			/* timeout */
-			hdq_priv.hdq_ctr = 500 / HDQ_SAMPLE_PERIOD_US;
-			hdq_priv.hdq_state = HDQB_DATA_RX_LOW;
-			break;
-		}
-		if (--hdq_priv.hdq_ctr == 0) { /* timed out, error */
-			hdq_priv.hdq_error = 1;
-			hdq_priv.hdq_transaction_ctr = hdq_priv.hdq_request_ctr;
-			hdq_priv.hdq_state = HDQB_IDLE; /* abort */
-		}
-		break;
-
-	/*
-	 * HDQ basically works by measuring the low time of the bit cell
-	 * 32-50us --> '1', 80 - 145us --> '0'
-	 */
-
-	case HDQB_DATA_RX_LOW:
-		if (hdq_priv.pdata->gpio_get()) {
-			hdq_priv.hdq_rx_data >>= 1;
-			if (hdq_priv.hdq_ctr2 <= (65 / HDQ_SAMPLE_PERIOD_US))
-				hdq_priv.hdq_rx_data |= 0x80;
-
-			if (--hdq_priv.hdq_bit == 0) {
-				hdq_priv.hdq_error = 0;
-				hdq_priv.hdq_transaction_ctr =
-							hdq_priv.hdq_request_ctr;
-
-				hdq_priv.hdq_state = HDQB_IDLE;
-			} else
-				hdq_priv.hdq_state = HDQB_DATA_RX_HIGH;
-			/* timeout */
-			hdq_priv.hdq_ctr = 1000 / HDQ_SAMPLE_PERIOD_US;
-			hdq_priv.hdq_ctr2 = 1;
-			break;
-		}
-		hdq_priv.hdq_ctr2++;
-		if (--hdq_priv.hdq_ctr)
-			break;
-		 /* timed out, error */
-		hdq_priv.hdq_error = 2;
-		hdq_priv.hdq_transaction_ctr = hdq_priv.hdq_request_ctr;
-		hdq_priv.hdq_state = HDQB_IDLE; /* abort */
-		break;
-
-	case HDQB_DATA_RX_HIGH:
-		if (!hdq_priv.pdata->gpio_get()) {
-			/* it talks to us! */
-			hdq_priv.hdq_ctr2 = 1;
-			/* timeout */
-			hdq_priv.hdq_ctr = 400 / HDQ_SAMPLE_PERIOD_US;
-			hdq_priv.hdq_state = HDQB_DATA_RX_LOW;
-			break;
-		}
-		if (--hdq_priv.hdq_ctr)
-			break;
-		/* timed out, error */
-		hdq_priv.hdq_error = 3;
-		hdq_priv.hdq_transaction_ctr = hdq_priv.hdq_request_ctr;
-
-		/* we're in input mode already */
-		hdq_priv.hdq_state = HDQB_IDLE; /* abort */
-		break;
-	}
-
-	/* Are we interested in keeping the FIQ source alive ? */
-	if (hdq_priv.hdq_state != HDQB_IDLE)
-		return 1;
-	else
-		return 0;
-}
-static int fiq_busy(void)
-{
-	int request = (volatile u8)hdq_priv.hdq_request_ctr;
-	int transact = (volatile u8)hdq_priv.hdq_transaction_ctr;
-
-
-	return (request != transact);
-}
-
-int hdq_initialized(void)
-{
-	return hdq_priv.hdq_probed;
-}
-EXPORT_SYMBOL_GPL(hdq_initialized);
-
-int hdq_read(int address)
-{
-	int count_sleeps = 5;
-	int ret = -ETIME;
-
-	if (!hdq_priv.hdq_probed)
-		return -EINVAL;
-
-	mutex_lock(&hdq_priv.hdq_lock);
-
-	hdq_priv.hdq_error = 0;
-	hdq_priv.hdq_ads = address | HDQ_READ;
-	hdq_priv.hdq_request_ctr++;
-	hdq_priv.pdata->kick_fiq();
-	/*
-	 * FIQ takes care of it while we block our calling process
-	 * But we're not spinning -- other processes run normally while
-	 * we wait for the result
-	 */
-	while (count_sleeps--) {
-		msleep(10); /* valid transaction always completes in < 10ms */
-
-		if (fiq_busy())
-			continue;
-
-		if (hdq_priv.hdq_error) {
-			hdq_bad();
-			goto done; /* didn't see a response in good time */
-		}
-		hdq_good();
-
-		ret = hdq_priv.hdq_rx_data;
-		goto done;
-	}
-
-done:
-	mutex_unlock(&hdq_priv.hdq_lock);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(hdq_read);
-
-int hdq_write(int address, u8 data)
-{
-	int count_sleeps = 5;
-	int ret = -ETIME;
-
-	if (!hdq_priv.hdq_probed)
-		return -EINVAL;
-
-	mutex_lock(&hdq_priv.hdq_lock);
-
-	hdq_priv.hdq_error = 0;
-	hdq_priv.hdq_ads = address | HDQ_WRITE;
-	hdq_priv.hdq_tx_data = data;
-	hdq_priv.hdq_request_ctr++;
-	hdq_priv.pdata->kick_fiq();
-	/*
-	 * FIQ takes care of it while we block our calling process
-	 * But we're not spinning -- other processes run normally while
-	 * we wait for the result
-	 */
-	while (count_sleeps--) {
-		msleep(10); /* valid transaction always completes in < 10ms */
-
-		if (fiq_busy())
-			continue; /* something bad with FIQ */
-
-		if (hdq_priv.hdq_error) {
-			hdq_bad();
-			goto done; /* didn't see a response in good time */
-		}
-		hdq_good();
-
-		ret = 0;
-		goto done;
-	}
-
-done:
-	mutex_unlock(&hdq_priv.hdq_lock);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(hdq_write);
-
-/* sysfs */
-
-static ssize_t hdq_sysfs_dump(struct device *dev, struct device_attribute *attr,
-			 char *buf)
-{
-	int n;
-	int v;
-	u8 u8a[128]; /* whole address space for HDQ */
-	char *end = buf;
-
-	if (!hdq_priv.hdq_probed)
-		return -EINVAL;
-
-	/* the dump does not take care about 16 bit regs, because at this
-	 * bus level we don't know about the chip details
-	 */
-	for (n = 0; n < sizeof(u8a); n++) {
-		v = hdq_read(n);
-		if (v < 0)
-			goto bail;
-		u8a[n] = v;
-	}
-
-	for (n = 0; n < sizeof(u8a); n += 16) {
-		hex_dump_to_buffer(u8a + n, sizeof(u8a), 16, 1, end, 4096, 0);
-		end += strlen(end);
-		*end++ = '\n';
-		*end = '\0';
-	}
-	return (end - buf);
-
-bail:
-	return sprintf(buf, "ERROR %d\n", v);
-}
-
-/* you write by <address> <data>, eg, "34 128" */
-
-#define atoi(str) simple_strtoul(((str != NULL) ? str : ""), NULL, 0)
-
-static ssize_t hdq_sysfs_write(struct device *dev,
-			       struct device_attribute *attr,
-			       const char *buf, size_t count)
-{
-	const char *end = buf + count;
-	int address = atoi(buf);
-
-	if (!hdq_priv.hdq_probed)
-		return -EINVAL;
-
-	while ((buf != end) && (*buf != ' '))
-		buf++;
-	if (buf >= end)
-		return 0;
-	while ((buf < end) && (*buf == ' '))
-		buf++;
-	if (buf >= end)
-		return 0;
-
-	hdq_write(address, atoi(buf));
-
-	return count;
-}
-
-static DEVICE_ATTR(dump, 0400, hdq_sysfs_dump, NULL);
-static DEVICE_ATTR(write, 0600, NULL, hdq_sysfs_write);
-
-static struct attribute *hdq_sysfs_entries[] = {
-	&dev_attr_dump.attr,
-	&dev_attr_write.attr,
-	NULL
-};
-
-static struct attribute_group hdq_attr_group = {
-	.name	= "hdq",
-	.attrs	= hdq_sysfs_entries,
-};
-
-
-#ifdef CONFIG_PM
-static int hdq_suspend(struct platform_device *pdev, pm_message_t state)
-{
-	/* after 18s of this, the battery monitor will also go to sleep */
-	hdq_priv.pdata->gpio_dir_in();
-	hdq_priv.pdata->disable_fiq();
-	return 0;
-}
-
-static int hdq_resume(struct platform_device *pdev)
-{
-	hdq_priv.pdata->gpio_set(1);
-	hdq_priv.pdata->gpio_dir_out();
-	hdq_priv.pdata->enable_fiq();
-	return 0;
-}
-#endif
-
-static int __init hdq_probe(struct platform_device *pdev)
-{
-	struct resource *r = platform_get_resource(pdev, 0, 0);
-	int ret;
-	struct hdq_platform_data *pdata = pdev->dev.platform_data;
-
-	if (!r || !pdata)
-		return -EINVAL;
-
-	platform_set_drvdata(pdev, NULL);
-
-	mutex_init(&hdq_priv.hdq_lock);
-
-	/* set our HDQ comms pin from the platform data */
-	hdq_priv.hdq_gpio_pin = r->start;
-	hdq_priv.pdata = pdata;
-
-	hdq_priv.pdata->gpio_set(1);
-	hdq_priv.pdata->gpio_dir_out();
-
-	/* Initialize FIQ */
-	if (hdq_priv.pdata->enable_fiq() < 0) {
-		dev_err(&pdev->dev, "Could not enable FIQ source\n");
-		return -EINVAL;
-	}
-
-	ret = sysfs_create_group(&pdev->dev.kobj, &hdq_attr_group);
-	if (ret)
-		return ret;
-
-	hdq_priv.hdq_probed = 1; /* we are ready to do stuff now */
-
-	/*
-	 * if wanted, users can defer registration of devices
-	 * that depend on HDQ until after we register, and can use our
-	 * device as parent so suspend-resume ordering is correct
-	 */
-	if (pdata->attach_child_devices)
-		(pdata->attach_child_devices)(&pdev->dev);
-
-	hdq_priv.pdata = pdata;
-
-	return 0;
-}
-
-static int hdq_remove(struct platform_device *pdev)
-{
-	sysfs_remove_group(&pdev->dev.kobj, &hdq_attr_group);
-	return 0;
-}
-
-static struct platform_driver hdq_driver = {
-	.probe		= hdq_probe,
-	.remove		= hdq_remove,
-#ifdef CONFIG_PM
-	.suspend	= hdq_suspend,
-	.resume		= hdq_resume,
-#endif
-	.driver		= {
-		.name		= "hdq",
-	},
-};
-
-static int __init hdq_init(void)
-{
-	return platform_driver_register(&hdq_driver);
-}
-
-static void __exit hdq_exit(void)
-{
- 	platform_driver_unregister(&hdq_driver);
-}
-
-module_init(hdq_init);
-module_exit(hdq_exit);
-
-MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
-MODULE_DESCRIPTION("HDQ driver");