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-rwxr-xr-xtarget/linux/s3c24xx/patches/0048-fiq-hdq.patch.patch606
1 files changed, 606 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches/0048-fiq-hdq.patch.patch b/target/linux/s3c24xx/patches/0048-fiq-hdq.patch.patch
new file mode 100755
index 0000000000..b8189a1edc
--- /dev/null
+++ b/target/linux/s3c24xx/patches/0048-fiq-hdq.patch.patch
@@ -0,0 +1,606 @@
+From d183fa083737f2b042ecf92166951c30fd83fe61 Mon Sep 17 00:00:00 2001
+From: mokopatches <mokopatches@openmoko.org>
+Date: Fri, 25 Jul 2008 22:21:23 +0100
+Subject: [PATCH] fiq-hdq.patch
+
+---
+ arch/arm/mach-s3c2440/mach-gta02.c | 204 +++++++++++++++++++++-
+ drivers/power/Kconfig | 8 +
+ drivers/power/Makefile | 2 +
+ drivers/power/gta02_hdq.c | 250 ++++++++++++++++++++++++++
+ include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h | 23 +++
+ include/asm-arm/arch-s3c2410/gta02.h | 1 +
+ include/linux/gta02_hdq.h | 8 +
+ 7 files changed, 495 insertions(+), 1 deletions(-)
+ create mode 100644 drivers/power/gta02_hdq.c
+ create mode 100644 include/linux/gta02_hdq.h
+
+diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
+index 8c7bbe7..cea76e7 100644
+--- a/arch/arm/mach-s3c2440/mach-gta02.c
++++ b/arch/arm/mach-s3c2440/mach-gta02.c
+@@ -99,6 +99,19 @@ EXPORT_SYMBOL(fiq_ipc);
+
+ #define FIQ_DIVISOR_VIBRATOR DIVISOR_FROM_US(100)
+
++#ifdef CONFIG_GTA02_HDQ
++/* HDQ specific */
++#define HDQ_SAMPLE_PERIOD_US 20
++/* private HDQ FSM state -- all other info interesting for caller in fiq_ipc */
++static enum hdq_bitbang_states hdq_state;
++static u8 hdq_ctr;
++static u8 hdq_ctr2;
++static u8 hdq_bit;
++static u8 hdq_shifter;
++static u8 hdq_tx_data_done;
++
++#define FIQ_DIVISOR_HDQ DIVISOR_FROM_US(HDQ_SAMPLE_PERIOD_US)
++#endif
+ /* define FIQ ISR */
+
+ FIQ_HANDLER_START()
+@@ -121,9 +134,171 @@ FIQ_HANDLER_ENTRY(256, 512)
+ divisor = FIQ_DIVISOR_VIBRATOR;
+ }
+
+- /* TODO: HDQ servicing */
++#ifdef CONFIG_GTA02_HDQ
++ /* HDQ servicing */
++
++ switch (hdq_state) {
++ case HDQB_IDLE:
++ if (fiq_ipc.hdq_request_ctr == fiq_ipc.hdq_transaction_ctr)
++ break;
++ hdq_ctr = 210 / HDQ_SAMPLE_PERIOD_US;
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 0);
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_OUTPUT);
++ hdq_tx_data_done = 0;
++ hdq_state = HDQB_TX_BREAK;
++ break;
++
++ case HDQB_TX_BREAK: /* issue low for > 190us */
++ if (--hdq_ctr == 0) {
++ hdq_ctr = 60 / HDQ_SAMPLE_PERIOD_US;
++ hdq_state = HDQB_TX_BREAK_RECOVERY;
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 1);
++ }
++ break;
++
++ case HDQB_TX_BREAK_RECOVERY: /* issue low for > 40us */
++ if (--hdq_ctr)
++ break;
++ hdq_shifter = fiq_ipc.hdq_ads;
++ hdq_bit = 8; /* 8 bits of ads / rw */
++ hdq_tx_data_done = 0; /* doing ads */
++ /* fallthru on last one */
++ case HDQB_ADS_CALC:
++ if (hdq_shifter & 1)
++ hdq_ctr = 50 / HDQ_SAMPLE_PERIOD_US;
++ else
++ hdq_ctr = 120 / HDQ_SAMPLE_PERIOD_US;
++ /* carefully precompute the other phase length */
++ hdq_ctr2 = (210 - (hdq_ctr * HDQ_SAMPLE_PERIOD_US)) /
++ HDQ_SAMPLE_PERIOD_US;
++ hdq_state = HDQB_ADS_LOW;
++ hdq_shifter >>= 1;
++ hdq_bit--;
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 0);
++ break;
++
++ case HDQB_ADS_LOW:
++ if (--hdq_ctr)
++ break;
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 1);
++ hdq_state = HDQB_ADS_HIGH;
++ break;
++
++ case HDQB_ADS_HIGH:
++ if (--hdq_ctr2 > 1) /* account for HDQB_ADS_CALC */
++ break;
++ if (hdq_bit) { /* more bits to do */
++ hdq_state = HDQB_ADS_CALC;
++ break;
++ }
++ /* no more bits, wait it out until hdq_ctr2 exhausted */
++ if (hdq_ctr2)
++ break;
++ /* ok no more bits and very last state */
++ hdq_ctr = 60 / HDQ_SAMPLE_PERIOD_US;
++ /* FIXME 0 = read */
++ if (fiq_ipc.hdq_ads & 0x80) { /* write the byte out */
++ /* set delay before payload */
++ hdq_ctr = 300 / HDQ_SAMPLE_PERIOD_US;
++ /* already high, no need to write */
++ hdq_state = HDQB_WAIT_TX;
++ break;
++ }
++ /* read the next byte */
++ hdq_bit = 8; /* 8 bits of data */
++ hdq_ctr = 3000 / HDQ_SAMPLE_PERIOD_US;
++ hdq_state = HDQB_WAIT_RX;
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_INPUT);
++ break;
++
++ case HDQB_WAIT_TX: /* issue low for > 40us */
++ if (--hdq_ctr)
++ break;
++ if (!hdq_tx_data_done) { /* was that the data sent? */
++ hdq_tx_data_done++;
++ hdq_shifter = fiq_ipc.hdq_tx_data;
++ hdq_bit = 8; /* 8 bits of data */
++ hdq_state = HDQB_ADS_CALC; /* start sending */
++ break;
++ }
++ fiq_ipc.hdq_error = 0;
++ fiq_ipc.hdq_transaction_ctr++;
++ hdq_state = HDQB_IDLE; /* all tx is done */
++ /* idle in input mode, it's pulled up by 10K */
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_INPUT);
++ break;
++
++ case HDQB_WAIT_RX: /* wait for battery to talk to us */
++ if (s3c2410_gpio_getpin(fiq_ipc.hdq_gpio_pin) == 0) {
++ /* it talks to us! */
++ hdq_ctr2 = 1;
++ hdq_bit = 8; /* 8 bits of data */
++ /* timeout */
++ hdq_ctr = 300 / HDQ_SAMPLE_PERIOD_US;
++ hdq_state = HDQB_DATA_RX_LOW;
++ break;
++ }
++ if (--hdq_ctr == 0) { /* timed out, error */
++ fiq_ipc.hdq_error = 1;
++ fiq_ipc.hdq_transaction_ctr++;
++ 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 (s3c2410_gpio_getpin(fiq_ipc.hdq_gpio_pin)) {
++ fiq_ipc.hdq_rx_data >>= 1;
++ if (hdq_ctr2 <= (65 / HDQ_SAMPLE_PERIOD_US))
++ fiq_ipc.hdq_rx_data |= 0x80;
++
++ if (--hdq_bit == 0) {
++ fiq_ipc.hdq_error = 0;
++ fiq_ipc.hdq_transaction_ctr++; /* done */
++ hdq_state = HDQB_IDLE;
++ } else
++ hdq_state = HDQB_DATA_RX_HIGH;
++ /* timeout */
++ hdq_ctr = 1000 / HDQ_SAMPLE_PERIOD_US;
++ hdq_ctr2 = 1;
++ break;
++ }
++ hdq_ctr2++;
++ if (--hdq_ctr)
++ break;
++ /* timed out, error */
++ fiq_ipc.hdq_error = 2;
++ fiq_ipc.hdq_transaction_ctr++;
++ hdq_state = HDQB_IDLE; /* abort */
++ break;
+
++ case HDQB_DATA_RX_HIGH:
++ if (!s3c2410_gpio_getpin(fiq_ipc.hdq_gpio_pin)) {
++ /* it talks to us! */
++ hdq_ctr2 = 1;
++ /* timeout */
++ hdq_ctr = 400 / HDQ_SAMPLE_PERIOD_US;
++ hdq_state = HDQB_DATA_RX_LOW;
++ break;
++ }
++ if (--hdq_ctr)
++ break;
++ /* timed out, error */
++ fiq_ipc.hdq_error = 3;
++ fiq_ipc.hdq_transaction_ctr++;
++ /* we're in input mode already */
++ hdq_state = HDQB_IDLE; /* abort */
++ break;
++ }
+
++ if (hdq_state != HDQB_IDLE) /* ie, not idle */
++ if (divisor > FIQ_DIVISOR_HDQ)
++ divisor = FIQ_DIVISOR_HDQ; /* keep us going */
++#endif
+
+ /* disable further timer interrupts if nobody has any work
+ * or adjust rate according to who still has work
+@@ -391,6 +566,23 @@ struct platform_device sc32440_fiq_device = {
+ .resource = sc32440_fiq_resources,
+ };
+
++#ifdef CONFIG_GTA02_HDQ
++/* HDQ */
++
++static struct resource gta02_hdq_resources[] = {
++ [0] = {
++ .start = GTA02v5_GPIO_HDQ,
++ .end = GTA02v5_GPIO_HDQ,
++ },
++};
++
++struct platform_device gta02_hdq_device = {
++ .name = "gta02-hdq",
++ .num_resources = 1,
++ .resource = gta02_hdq_resources,
++};
++#endif
++
+ /* NOR Flash */
+
+ #define GTA02_FLASH_BASE 0x18000000 /* GCS3 */
+@@ -1074,6 +1266,16 @@ static void __init gta02_machine_init(void)
+
+ platform_add_devices(gta02_devices, ARRAY_SIZE(gta02_devices));
+
++#ifdef CONFIG_GTA02_HDQ
++ switch (system_rev) {
++ case GTA02v5_SYSTEM_REV:
++ case GTA02v6_SYSTEM_REV:
++ platform_device_register(&gta02_hdq_device);
++ break;
++ default:
++ break;
++ }
++#endif
+ s3c2410_pm_init();
+
+ /* Set LCD_RESET / XRES to high */
+diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
+index 58c806e..0a4515d 100644
+--- a/drivers/power/Kconfig
++++ b/drivers/power/Kconfig
+@@ -50,3 +50,11 @@ config BATTERY_OLPC
+ Say Y to enable support for the battery on the OLPC laptop.
+
+ endif # POWER_SUPPLY
++
++config GTA02_HDQ
++ tristate "Neo Freerunner HDQ"
++ depends on MACH_NEO1973_GTA02 && FIQ && S3C2440_C_FIQ
++ help
++ Say Y to enable support for communicating with an HDQ battery
++ on the Neo Freerunner. You probably want to select
++ at least BATTERY_BQ27000_HDQ as well
+diff --git a/drivers/power/Makefile b/drivers/power/Makefile
+index 6413ded..88f227f 100644
+--- a/drivers/power/Makefile
++++ b/drivers/power/Makefile
+@@ -20,3 +20,5 @@ obj-$(CONFIG_APM_POWER) += apm_power.o
+ obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
+ obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
+ obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
++
++obj-$(CONFIG_GTA02_HDQ) += gta02_hdq.o
+diff --git a/drivers/power/gta02_hdq.c b/drivers/power/gta02_hdq.c
+new file mode 100644
+index 0000000..12c742e
+--- /dev/null
++++ b/drivers/power/gta02_hdq.c
+@@ -0,0 +1,250 @@
++/*
++ * HDQ driver for the FIC Neo1973 GTA02 GSM phone
++ *
++ * (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 <asm/hardware.h>
++#include <asm/mach-types.h>
++#include <asm/arch/gta02.h>
++#include <asm/arch/fiq_ipc_gta02.h>
++
++
++
++#define HDQ_READ 0
++#define HDQ_WRITE 0x80
++
++
++int gta02hdq_initialized(void)
++{
++ return fiq_ipc.hdq_probed;
++}
++EXPORT_SYMBOL_GPL(gta02hdq_initialized);
++
++int gta02hdq_read(int address)
++{
++ int count_sleeps = 5;
++ int ret = -ETIME;
++
++ mutex_lock(&fiq_ipc.hdq_lock);
++
++ fiq_ipc.hdq_ads = address | HDQ_READ;
++ fiq_ipc.hdq_request_ctr++;
++ fiq_kick();
++ /*
++ * 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_ipc.hdq_request_ctr != fiq_ipc.hdq_transaction_ctr)
++ continue;
++
++ if (fiq_ipc.hdq_error)
++ goto done; /* didn't see a response in good time */
++
++ ret = fiq_ipc.hdq_rx_data;
++ goto done;
++ }
++ ret = -EINVAL;
++
++done:
++ mutex_unlock(&fiq_ipc.hdq_lock);
++ return ret;
++}
++EXPORT_SYMBOL_GPL(gta02hdq_read);
++
++int gta02hdq_write(int address, u8 data)
++{
++ int count_sleeps = 5;
++ int ret = -ETIME;
++
++ mutex_lock(&fiq_ipc.hdq_lock);
++
++ fiq_ipc.hdq_ads = address | HDQ_WRITE;
++ fiq_ipc.hdq_tx_data = data;
++ fiq_ipc.hdq_request_ctr++;
++ fiq_kick();
++ /*
++ * 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_ipc.hdq_request_ctr != fiq_ipc.hdq_transaction_ctr)
++ continue; /* something bad with FIQ */
++
++ if (fiq_ipc.hdq_error)
++ goto done; /* didn't see a response in good time */
++ }
++ ret = -EINVAL;
++
++done:
++ mutex_unlock(&fiq_ipc.hdq_lock);
++ return ret;
++}
++EXPORT_SYMBOL_GPL(gta02hdq_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;
++
++ /* 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 = gta02hdq_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);
++
++ while ((buf != end) && (*buf != ' '))
++ buf++;
++ if (buf >= end)
++ return 0;
++ while ((buf < end) && (*buf == ' '))
++ buf++;
++ if (buf >= end)
++ return 0;
++
++ gta02hdq_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 *gta02hdq_sysfs_entries[] = {
++ &dev_attr_dump.attr,
++ &dev_attr_write.attr,
++ NULL
++};
++
++static struct attribute_group gta02hdq_attr_group = {
++ .name = "hdq",
++ .attrs = gta02hdq_sysfs_entries,
++};
++
++
++#ifdef CONFIG_PM
++static int gta02hdq_suspend(struct platform_device *pdev, pm_message_t state)
++{
++ /* after 18s of this, the battery monitor will also go to sleep */
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 0);
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_OUTPUT);
++ return 0;
++}
++
++static int gta02hdq_resume(struct platform_device *pdev)
++{
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 1);
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_OUTPUT);
++ return 0;
++}
++#endif
++
++static int __init gta02hdq_probe(struct platform_device *pdev)
++{
++ struct resource *r = platform_get_resource(pdev, 0, 0);
++
++ if (!machine_is_neo1973_gta02())
++ return -EIO;
++
++ if (!r)
++ return -EINVAL;
++
++ platform_set_drvdata(pdev, NULL);
++
++ mutex_init(&fiq_ipc.hdq_lock);
++
++ /* set our HDQ comms pin from the platform data */
++ fiq_ipc.hdq_gpio_pin = r->start;
++
++ s3c2410_gpio_setpin(fiq_ipc.hdq_gpio_pin, 1);
++ s3c2410_gpio_cfgpin(fiq_ipc.hdq_gpio_pin, S3C2410_GPIO_OUTPUT);
++
++ fiq_ipc.hdq_probed = 1; /* we are ready to do stuff now */
++
++ return sysfs_create_group(&pdev->dev.kobj, &gta02hdq_attr_group);
++}
++
++static int gta02hdq_remove(struct platform_device *pdev)
++{
++ sysfs_remove_group(&pdev->dev.kobj, &gta02hdq_attr_group);
++ return 0;
++}
++
++static struct platform_driver gta02hdq_driver = {
++ .probe = gta02hdq_probe,
++ .remove = gta02hdq_remove,
++#ifdef CONFIG_PM
++ .suspend = gta02hdq_suspend,
++ .resume = gta02hdq_resume,
++#endif
++ .driver = {
++ .name = "gta02-hdq",
++ },
++};
++
++static int __init gta02hdq_init(void)
++{
++ return platform_driver_register(&gta02hdq_driver);
++}
++
++static void __exit gta02hdq_exit(void)
++{
++ platform_driver_unregister(&gta02hdq_driver);
++}
++
++module_init(gta02hdq_init);
++module_exit(gta02hdq_exit);
++
++MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
++MODULE_DESCRIPTION("GTA02 HDQ driver");
++MODULE_LICENSE("GPL");
+diff --git a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h
+index 507d235..c5eb3df 100644
+--- a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h
++++ b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h
+@@ -19,12 +19,35 @@
+ #include <asm/arch/pwm.h>
+ #include <asm/plat-s3c/regs-timer.h>
+
++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,
++};
+
+ struct fiq_ipc {
+ /* vibrator */
+ unsigned long vib_gpio_pin; /* which pin to meddle with */
+ u8 vib_pwm; /* 0 = OFF -- will ensure GPIO deasserted and stop FIQ */
+ u8 vib_pwm_latched;
++
++ /* hdq */
++ 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 */
+ };
+
+ /* actual definition lives in arch/arm/mach-s3c2440/fiq_c_isr.c */
+diff --git a/include/asm-arm/arch-s3c2410/gta02.h b/include/asm-arm/arch-s3c2410/gta02.h
+index fa49d93..f686a7a 100644
+--- a/include/asm-arm/arch-s3c2410/gta02.h
++++ b/include/asm-arm/arch-s3c2410/gta02.h
+@@ -37,6 +37,7 @@
+
+ #define GTA02v3_GPIO_nG1_CS S3C2410_GPD12 /* v3 + v4 only */
+ #define GTA02v3_GPIO_nG2_CS S3C2410_GPD13 /* v3 + v4 only */
++#define GTA02v5_GPIO_HDQ S3C2410_GPD14 /* v5 + */
+
+ #define GTA02_GPIO_nG1_INT S3C2410_GPF0
+ #define GTA02_GPIO_IO1 S3C2410_GPF1
+diff --git a/include/linux/gta02_hdq.h b/include/linux/gta02_hdq.h
+new file mode 100644
+index 0000000..2f43a62
+--- /dev/null
++++ b/include/linux/gta02_hdq.h
+@@ -0,0 +1,8 @@
++#ifndef __GTA02HDQ_H__
++#define __GTA02HDQ_H__
++
++int gta02hdq_read(int address);
++int gta02hdq_write(int address, u8 data);
++int gta02hdq_initialized(void);
++
++#endif
+--
+1.5.6.3
+