diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1054-introduce-fiq-use-timer3-as-source.patch.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1054-introduce-fiq-use-timer3-as-source.patch.patch | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1054-introduce-fiq-use-timer3-as-source.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1054-introduce-fiq-use-timer3-as-source.patch.patch deleted file mode 100644 index d02655bf5c..0000000000 --- a/target/linux/s3c24xx/patches-2.6.24/1054-introduce-fiq-use-timer3-as-source.patch.patch +++ /dev/null @@ -1,220 +0,0 @@ -From 4ef3bf9d0e7ffd1e70f24e47b7ede98258c8b8f4 Mon Sep 17 00:00:00 2001 -From: mokopatches <mokopatches@openmoko.org> -Date: Sun, 13 Apr 2008 07:23:51 +0100 -Subject: [PATCH] introduce-fiq-use-timer3-as-source.patch - -This makes the FIQ stuff specific to one of the timers on the -s3c244x and adds the platform stuff for fiq in the gta02 init - -Currently one sysfs node is exposed, a count of FIQ events - -cat /sys/devices/platform/sc32440_fiq.0/fiq/count - -From: Andy Green <andy@openmoko.com> -Signed-off-by: Andy Green <andy@openmoko.com> ---- - arch/arm/mach-s3c2440/fiq_c_isr.c | 56 +++++++++++++++++++++---- - arch/arm/mach-s3c2440/fiq_c_isr.h | 2 + - arch/arm/mach-s3c2440/mach-gta02.c | 17 ++++++++ - include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h | 2 +- - 4 files changed, 67 insertions(+), 10 deletions(-) - -diff --git a/arch/arm/mach-s3c2440/fiq_c_isr.c b/arch/arm/mach-s3c2440/fiq_c_isr.c -index 12f4527..a71a234 100644 ---- a/arch/arm/mach-s3c2440/fiq_c_isr.c -+++ b/arch/arm/mach-s3c2440/fiq_c_isr.c -@@ -18,6 +18,9 @@ - #include <asm/plat-s3c24xx/cpu.h> - #include <asm/plat-s3c24xx/irq.h> - -+#include <asm/arch/pwm.h> -+#include <asm/plat-s3c/regs-timer.h> -+ - /* - * Major Caveats for using FIQ - * --------------------------- -@@ -66,6 +69,10 @@ static u8 u8aFiqStack[4096]; - u32 _fiq_ack_mask; /* used by isr exit define */ - unsigned long _fiq_count_fiqs; /* used by isr exit define */ - static int _fiq_irq; /* private ; irq index we were started with, or 0 */ -+struct s3c2410_pwm pwm_timer_fiq; -+int _fiq_timer_index; -+u16 _fiq_timer_divisor; -+ - - /* this function must live in the monolithic kernel somewhere! A module is - * NOT good enough! -@@ -110,23 +117,45 @@ static struct attribute_group s3c2440_fiq_attr_group = { - * you still need to clear the source interrupt in S3C2410_INTMSK to get - * anything good happening - */ --static void fiq_init_irq_source(int irq_index_fiq) -+static int fiq_init_irq_source(int irq_index_fiq) - { -+ int rc = 0; -+ - if (!irq_index_fiq) /* no interrupt */ -- return; -+ goto bail; - -- printk(KERN_INFO"Enabling FIQ using int idx %d\n", -- irq_index_fiq - S3C2410_CPUIRQ_OFFSET); - local_fiq_disable(); - - _fiq_irq = irq_index_fiq; - _fiq_ack_mask = 1 << (irq_index_fiq - S3C2410_CPUIRQ_OFFSET); -+ timer_index = (irq_index_fiq - IRQ_TIMER0); -+ -+ /* set up the timer to operate as a pwm device */ -+ -+ rc = s3c2410_pwm_init(&pwm_timer_fiq); -+ if (rc) -+ goto bail; -+ -+ pwm_timer_fiq.timerid = PWM0 + 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; -+ -+ rc = s3c2410_pwm_enable(&pwm_timer_fiq); -+ if (rc) -+ goto bail; -+ -+ s3c2410_pwm_start(&pwm_timer_fiq); - - /* let our selected interrupt be a magic FIQ interrupt */ - __raw_writel(_fiq_ack_mask, S3C2410_INTMOD); - - /* it's ready to go as soon as we unmask the source in S3C2410_INTMSK */ - local_fiq_enable(); -+bail: -+ return rc; - } - - -@@ -139,15 +168,13 @@ static void fiq_disable_irq_source(void) - _fiq_irq = 0; /* no active source interrupt now either */ - } - --/* this starts FIQ timer events... they continue until the FIQ ISR sees that -- * its work is done and it turns off the timer. After setting up the fiq_ipc -- * struct with new work, you call this to start FIQ timer actions up again. -- * Only the FIQ ISR decides when it is done and controls turning off the -- * timer events. -+/* -+ * fiq_kick() forces a FIQ event to happen shortly after leaving the routine - */ - void fiq_kick(void) - { - unsigned long flags; -+ u32 tcon; - - /* we have to take care about FIQ because this modification is - * non-atomic, FIQ could come in after the read and before the -@@ -156,15 +183,24 @@ void fiq_kick(void) - */ - local_save_flags(flags); - local_fiq_disable(); -+ /* allow FIQs to resume */ - __raw_writel(__raw_readl(S3C2410_INTMSK) & - ~(1 << (_fiq_irq - S3C2410_CPUIRQ_OFFSET)), - 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(tcon | S3C2410_TCON_T3MANUALUPD, S3C2410_TCON); -+ __raw_writel(tcon | S3C2410_TCON_T3MANUALUPD | S3C2410_TCON_T3START, -+ S3C2410_TCON); -+ __raw_writel(tcon | S3C2410_TCON_T3START, S3C2410_TCON); - local_irq_restore(flags); - } - EXPORT_SYMBOL_GPL(fiq_kick); - - - -+ - static int __init sc32440_fiq_probe(struct platform_device *pdev) - { - struct resource *r = platform_get_resource(pdev, IORESOURCE_IRQ, 0); -@@ -172,6 +208,8 @@ 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); -+ - fiq_init_irq_source(r->start); - - return sysfs_create_group(&pdev->dev.kobj, &s3c2440_fiq_attr_group); -diff --git a/arch/arm/mach-s3c2440/fiq_c_isr.h b/arch/arm/mach-s3c2440/fiq_c_isr.h -index f08740e..0c45eb7 100644 ---- a/arch/arm/mach-s3c2440/fiq_c_isr.h -+++ b/arch/arm/mach-s3c2440/fiq_c_isr.h -@@ -5,6 +5,8 @@ - - extern unsigned long _fiq_count_fiqs; - extern u32 _fiq_ack_mask; -+extern int _fiq_timer_index; -+extern u16 _fiq_timer_divisor; - - /* This CANNOT be implemented in a module -- it has to be used in code - * included in the monolithic kernel -diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c -index 0bdd0e0..cb839b2 100644 ---- a/arch/arm/mach-s3c2440/mach-gta02.c -+++ b/arch/arm/mach-s3c2440/mach-gta02.c -@@ -57,6 +57,7 @@ - #include <asm/irq.h> - #include <asm/mach-types.h> - -+#include <asm/arch-s3c2410/regs-irq.h> - #include <asm/arch/regs-gpio.h> - #include <asm/arch/regs-gpioj.h> - #include <asm/arch/fb.h> -@@ -336,6 +337,21 @@ struct platform_device gta02_pmu_dev = { - }, - }; - -+/* FIQ */ -+ -+static struct resource sc32440_fiq_resources[] = { -+ [0] = { -+ .flags = IORESOURCE_IRQ, -+ .start = IRQ_TIMER3, -+ .end = IRQ_TIMER3, -+ }, -+}; -+ -+struct platform_device sc32440_fiq_device = { -+ .name = "sc32440_fiq", -+ .num_resources = 1, -+ .resource = sc32440_fiq_resources, -+}; - - /* NOR Flash */ - -@@ -403,6 +419,7 @@ static struct platform_device *gta02_devices[] __initdata = { - &s3c_device_nand, - &s3c_device_ts, - >a02_nor_flash, -+ &sc32440_fiq_device, - }; - - static struct s3c2410_nand_set gta02_nand_sets[] = { -diff --git a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h -index 341f2bb..6cbd8e4 100644 ---- a/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h -+++ b/include/asm-arm/arch-s3c2410/fiq_ipc_gta02.h -@@ -22,7 +22,7 @@ struct fiq_ipc { - - /* actual definition lives in arch/arm/mach-s3c2440/fiq_c_isr.c */ - extern struct fiq_ipc fiq_ipc; -- -+extern unsigned long _fiq_count_fiqs; - extern void fiq_kick(void); /* provoke a FIQ "immediately" */ - - #endif /* _LINUX_FIQ_IPC_H */ --- -1.5.6.5 - |