diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.26/0047-introduce-fiq-migrate-vibrator-gta02-only.patch.patch')
| -rwxr-xr-x | target/linux/s3c24xx/patches-2.6.26/0047-introduce-fiq-migrate-vibrator-gta02-only.patch.patch | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.26/0047-introduce-fiq-migrate-vibrator-gta02-only.patch.patch b/target/linux/s3c24xx/patches-2.6.26/0047-introduce-fiq-migrate-vibrator-gta02-only.patch.patch new file mode 100755 index 0000000000..f179555d1b --- /dev/null +++ b/target/linux/s3c24xx/patches-2.6.26/0047-introduce-fiq-migrate-vibrator-gta02-only.patch.patch @@ -0,0 +1,243 @@ +From b740b1200958baf4b5675017531c773bad5b64d0 Mon Sep 17 00:00:00 2001 +From: mokopatches <mokopatches@openmoko.org> +Date: Fri, 25 Jul 2008 22:21:23 +0100 +Subject: [PATCH] introduce-fiq-migrate-vibrator-gta02-only.patch + +On GTA02 we use FIQ to manage the vibrator IO now. That +is necessary because we stole timer3 from doing hw pwm +for vibrator. This keeps the same UI in /sys but does +"bitbang pwm" on the same vibrator GPIO + +From: Andy Green <andy@openmoko.com> +Signed-off-by: Andy Green <andy@openmoko.com> +--- + arch/arm/mach-s3c2440/fiq_c_isr.c | 13 +++++--- + arch/arm/mach-s3c2440/mach-gta02.c | 38 ++++++++++++++++++++++++++ + drivers/leds/Kconfig | 1 + + drivers/leds/leds-neo1973-vibrator.c | 24 +++++++++++++++- + include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h | 9 +++++- + 5 files changed, 77 insertions(+), 8 deletions(-) + +diff --git a/arch/arm/mach-s3c2440/fiq_c_isr.c b/arch/arm/mach-s3c2440/fiq_c_isr.c +index a71a234..38692fc 100644 +--- a/arch/arm/mach-s3c2440/fiq_c_isr.c ++++ b/arch/arm/mach-s3c2440/fiq_c_isr.c +@@ -79,6 +79,7 @@ u16 _fiq_timer_divisor; + */ + extern void __attribute__ ((naked)) s3c2440_fiq_isr(void); + ++ + /* this is copied into the hard FIQ vector during init */ + + static void __attribute__ ((naked)) s3c2440_FIQ_Branch(void) +@@ -128,7 +129,7 @@ static int fiq_init_irq_source(int irq_index_fiq) + + _fiq_irq = irq_index_fiq; + _fiq_ack_mask = 1 << (irq_index_fiq - S3C2410_CPUIRQ_OFFSET); +- timer_index = (irq_index_fiq - IRQ_TIMER0); ++ _fiq_timer_index = (irq_index_fiq - IRQ_TIMER0); + + /* set up the timer to operate as a pwm device */ + +@@ -136,12 +137,11 @@ static int fiq_init_irq_source(int irq_index_fiq) + if (rc) + goto bail; + +- pwm_timer_fiq.timerid = PWM0 + timer_index; ++ pwm_timer_fiq.timerid = PWM0 + _fiq_timer_index; + pwm_timer_fiq.prescaler = (6 - 1) / 2; + pwm_timer_fiq.divider = S3C2410_TCFG1_MUX3_DIV2; + /* default rate == ~32us */ +- pwm_timer_fiq.counter = pwm_timer_fiq.comparer = +- timer_divisor = 64; ++ pwm_timer_fiq.counter = pwm_timer_fiq.comparer = 3000; + + rc = s3c2410_pwm_enable(&pwm_timer_fiq); + if (rc) +@@ -149,6 +149,8 @@ static int fiq_init_irq_source(int irq_index_fiq) + + s3c2410_pwm_start(&pwm_timer_fiq); + ++ _fiq_timer_divisor = 0xffff; /* so kick will work initially */ ++ + /* let our selected interrupt be a magic FIQ interrupt */ + __raw_writel(_fiq_ack_mask, S3C2410_INTMOD); + +@@ -189,7 +191,7 @@ void fiq_kick(void) + S3C2410_INTMSK); + tcon = __raw_readl(S3C2410_TCON) & ~S3C2410_TCON_T3START; + /* fake the timer to a count of 1 */ +- __raw_writel(1, S3C2410_TCNTB(timer_index)); ++ __raw_writel(1, S3C2410_TCNTB(_fiq_timer_index)); + __raw_writel(tcon | S3C2410_TCON_T3MANUALUPD, S3C2410_TCON); + __raw_writel(tcon | S3C2410_TCON_T3MANUALUPD | S3C2410_TCON_T3START, + S3C2410_TCON); +@@ -207,6 +209,7 @@ static int __init sc32440_fiq_probe(struct platform_device *pdev) + + if (!r) + return -EIO; ++ + /* configure for the interrupt we are meant to use */ + printk(KERN_INFO"Enabling FIQ using irq %d\n", r->start); + +diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c +index cb839b2..8c7bbe7 100644 +--- a/arch/arm/mach-s3c2440/mach-gta02.c ++++ b/arch/arm/mach-s3c2440/mach-gta02.c +@@ -95,12 +95,50 @@ static spinlock_t motion_irq_lock; + struct fiq_ipc fiq_ipc; + EXPORT_SYMBOL(fiq_ipc); + ++#define DIVISOR_FROM_US(x) ((x) << 1) ++ ++#define FIQ_DIVISOR_VIBRATOR DIVISOR_FROM_US(100) ++ + /* define FIQ ISR */ + + FIQ_HANDLER_START() + /* define your locals here -- no initializers though */ ++ u16 divisor; + FIQ_HANDLER_ENTRY(256, 512) + /* Your ISR here :-) */ ++ divisor = 0xffff; ++ ++ /* Vibrator servicing */ ++ ++ if (fiq_ipc.vib_pwm_latched || fiq_ipc.vib_pwm) { /* not idle */ ++ if (((u8)_fiq_count_fiqs) == fiq_ipc.vib_pwm_latched) ++ s3c2410_gpio_setpin(fiq_ipc.vib_gpio_pin, 0); ++ if (((u8)_fiq_count_fiqs) == 0) { ++ fiq_ipc.vib_pwm_latched = fiq_ipc.vib_pwm; ++ if (fiq_ipc.vib_pwm_latched) ++ s3c2410_gpio_setpin(fiq_ipc.vib_gpio_pin, 1); ++ } ++ divisor = FIQ_DIVISOR_VIBRATOR; ++ } ++ ++ /* TODO: HDQ servicing */ ++ ++ ++ ++ /* disable further timer interrupts if nobody has any work ++ * or adjust rate according to who still has work ++ * ++ * CAUTION: it means forground code must disable FIQ around ++ * its own non-atomic S3C2410_INTMSK changes... not common ++ * thankfully and taken care of by the fiq-basis patch ++ */ ++ if (divisor == 0xffff) /* mask the fiq irq source */ ++ __raw_writel(__raw_readl(S3C2410_INTMSK) | _fiq_ack_mask, ++ S3C2410_INTMSK); ++ else /* still working, maybe at a different rate */ ++ __raw_writel(divisor, S3C2410_TCNTB(_fiq_timer_index)); ++ _fiq_timer_divisor = divisor; ++ + FIQ_HANDLER_END() + + +diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig +index b6b1211..5a0aa9c 100644 +--- a/drivers/leds/Kconfig ++++ b/drivers/leds/Kconfig +@@ -150,6 +150,7 @@ config LEDS_CLEVO_MAIL + config LEDS_NEO1973_VIBRATOR + tristate "Vibrator Support for the FIC Neo1973 GSM phone" + depends on LEDS_CLASS && MACH_NEO1973 ++ select S3C2440_C_FIQ + help + This option enables support for the vibrator on the FIC Neo1973. + +diff --git a/drivers/leds/leds-neo1973-vibrator.c b/drivers/leds/leds-neo1973-vibrator.c +index c943a6a..36ed216 100644 +--- a/drivers/leds/leds-neo1973-vibrator.c ++++ b/drivers/leds/leds-neo1973-vibrator.c +@@ -23,6 +23,8 @@ + #include <asm/arch/gta01.h> + #include <asm/plat-s3c/regs-timer.h> + ++#include <asm/arch-s3c2410/fiq_ipc_gta02.h> ++ + #define COUNTER 64 + + struct neo1973_vib_priv { +@@ -39,6 +41,11 @@ static void neo1973_vib_vib_set(struct led_classdev *led_cdev, + struct neo1973_vib_priv *vp = + container_of(led_cdev, struct neo1973_vib_priv, cdev); + ++ if (machine_is_neo1973_gta02()) { /* use FIQ to control GPIO */ ++ fiq_ipc.vib_pwm = value; /* set it for FIQ */ ++ fiq_kick(); /* start up FIQs if not already going */ ++ return; ++ } + /* + * value == 255 -> 99% duty cycle (full power) + * value == 128 -> 50% duty cycle (medium power) +@@ -46,7 +53,7 @@ static void neo1973_vib_vib_set(struct led_classdev *led_cdev, + */ + mutex_lock(&vp->mutex); + if (vp->has_pwm) +- s3c2410_pwm_duty_cycle(value/4, &vp->pwm); ++ s3c2410_pwm_duty_cycle(value / 4, &vp->pwm); + else { + if (value) + s3c2410_gpio_setpin(vp->gpio, 1); +@@ -123,6 +130,15 @@ static int __init neo1973_vib_probe(struct platform_device *pdev) + neo1973_vib_led.gpio = r->start; + platform_set_drvdata(pdev, &neo1973_vib_led); + ++ if (machine_is_neo1973_gta02()) { /* use FIQ to control GPIO */ ++ s3c2410_gpio_setpin(neo1973_vib_led.gpio, 0); /* off */ ++ s3c2410_gpio_cfgpin(neo1973_vib_led.gpio, S3C2410_GPIO_OUTPUT); ++ /* safe, kmalloc'd copy needed for FIQ ISR */ ++ fiq_ipc.vib_gpio_pin = neo1973_vib_led.gpio; ++ fiq_ipc.vib_pwm = 0; /* off */ ++ goto configured; ++ } ++ + /* TOUT3 */ + if (neo1973_vib_led.gpio == S3C2410_GPB3) { + rc = neo1973_vib_init_hw(&neo1973_vib_led); +@@ -133,7 +149,7 @@ static int __init neo1973_vib_probe(struct platform_device *pdev) + s3c2410_gpio_cfgpin(neo1973_vib_led.gpio, S3C2410_GPB3_TOUT3); + neo1973_vib_led.has_pwm = 1; + } +- ++configured: + mutex_init(&neo1973_vib_led.mutex); + + return led_classdev_register(&pdev->dev, &neo1973_vib_led.cdev); +@@ -141,6 +157,10 @@ static int __init neo1973_vib_probe(struct platform_device *pdev) + + static int neo1973_vib_remove(struct platform_device *pdev) + { ++ if (machine_is_neo1973_gta02()) /* use FIQ to control GPIO */ ++ fiq_ipc.vib_pwm = 0; /* off */ ++ /* would only need kick if already off so no kick needed */ ++ + if (neo1973_vib_led.has_pwm) + s3c2410_pwm_disable(&neo1973_vib_led.pwm); + +diff --git a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h +index 6cbd8e4..507d235 100644 +--- a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h ++++ b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h +@@ -16,8 +16,15 @@ + * for testing + */ + ++#include <asm/arch/pwm.h> ++#include <asm/plat-s3c/regs-timer.h> ++ ++ + struct fiq_ipc { +- u8 u8a[0]; /* placeholder */ ++ /* 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; + }; + + /* actual definition lives in arch/arm/mach-s3c2440/fiq_c_isr.c */ +-- +1.5.6.3 + |