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-rw-r--r--target/linux/realtek/files/arch/rlx/bsp/irq.c265
1 files changed, 265 insertions, 0 deletions
diff --git a/target/linux/realtek/files/arch/rlx/bsp/irq.c b/target/linux/realtek/files/arch/rlx/bsp/irq.c
new file mode 100644
index 000000000..80d5a3b71
--- /dev/null
+++ b/target/linux/realtek/files/arch/rlx/bsp/irq.c
@@ -0,0 +1,265 @@
+/*
+ * Realtek Semiconductor Corp.
+ *
+ * arch/rlx/rlxocp0/irq.c
+ * Interrupt and exception initialization for RLX OCP Platform
+ *
+ * Tony Wu (tonywu@realtek.com.tw)
+ * Nov. 7, 2006
+ */
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel_stat.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/timex.h>
+#include <linux/slab.h>
+#include <linux/random.h>
+#include <linux/irq.h>
+
+#include <asm/bitops.h>
+#include <asm/bootinfo.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/irq_cpu.h>
+#include <asm/irq_vec.h>
+#include <asm/system.h>
+
+#include <asm/rlxregs.h>
+#include <asm/rlxbsp.h>
+#include <net/rtl/rtl_types.h>
+#include "bspchip.h"
+
+static struct irqaction irq_cascade = {
+ .handler = no_action,
+ .mask = CPU_MASK_NONE,
+ .name = "cascade",
+};
+
+static void bsp_ictl_irq_mask(unsigned int irq)
+{
+ REG32(BSP_GIMR) &= ~(1 << (irq - BSP_IRQ_ICTL_BASE));
+}
+
+static void bsp_ictl_irq_unmask(unsigned int irq)
+{
+ REG32(BSP_GIMR) |= (1 << (irq - BSP_IRQ_ICTL_BASE));
+}
+
+static struct irq_chip bsp_ictl_irq = {
+ .typename = "ICTL",
+ .ack = bsp_ictl_irq_mask,
+ .mask = bsp_ictl_irq_mask,
+ .mask_ack = bsp_ictl_irq_mask,
+ .unmask = bsp_ictl_irq_unmask,
+};
+
+static void bsp_ictl_irq_dispatch(void)
+{
+ volatile unsigned int pending;
+
+ pending = REG32(BSP_GIMR) & REG32(BSP_GISR);
+
+ if (pending & BSP_UART0_IP)
+ do_IRQ(BSP_UART0_IRQ);
+ else if (pending & BSP_TC1_IP)
+ do_IRQ(BSP_TC1_IRQ);
+ else if (pending & BSP_GPIO_ABCD_IP)
+ do_IRQ(BSP_GPIO_ABCD_IRQ);
+ else {
+ REG32(BSP_GIMR) &= (~pending);
+ REG32(BSP_GISR) = REG32(BSP_GISR);
+ printk("Unknown Interrupt0:%x\n", pending);
+ #if defined(CONFIG_RTK_VOIP) || defined(CONFIG_RTL_819X)
+ spurious_interrupt(SPURIOS_INT_CASCADE);
+ #else
+ spurious_interrupt();
+ #endif
+ }
+}
+
+void bsp_irq_dispatch(void)
+{
+ volatile unsigned int pending;
+ pending = read_c0_cause() & read_c0_status();
+
+ if (pending & CAUSEF_IP2)
+ bsp_ictl_irq_dispatch();
+ else if (pending & CAUSEF_IP0)
+ do_IRQ(0);
+ else if (pending & CAUSEF_IP1)
+ do_IRQ(1);
+ else {
+#if defined(CONFIG_RTK_VOIP) || defined(CONFIG_RTL_819X)
+ spurious_interrupt(SPURIOS_INT_CPU);
+#else
+ spurious_interrupt();
+#endif
+ }
+}
+
+static void __init bsp_ictl_irq_init(unsigned int irq_base)
+{
+ int i;
+
+ for (i=0; i < BSP_IRQ_ICTL_NUM; i++)
+ set_irq_chip_and_handler(irq_base + i, &bsp_ictl_irq, handle_level_irq);
+
+ setup_irq(BSP_ICTL_IRQ, &irq_cascade);
+}
+
+void __init bsp_irq_init(void)
+{
+ //unsigned int status;
+ //volatile unsigned int status;
+ /* disable ict interrupt */
+ REG32(BSP_GIMR) = 0;
+
+ /* initialize IRQ action handlers */
+ rlx_cpu_irq_init(BSP_IRQ_CPU_BASE);
+ rlx_vec_irq_init(BSP_IRQ_LOPI_BASE);
+ bsp_ictl_irq_init(BSP_IRQ_ICTL_BASE);
+
+ /* Set IRR */
+ REG32(BSP_IRR0) = BSP_IRR0_SETTING;
+ REG32(BSP_IRR1) = BSP_IRR1_SETTING;
+ REG32(BSP_IRR2) = BSP_IRR2_SETTING;
+ REG32(BSP_IRR3) = BSP_IRR3_SETTING;
+
+ //status = read_c0_status();
+ //status = (status&(~ST0_IM))|(CAUSEF_IP2|CAUSEF_IP3|CAUSEF_IP4|CAUSEF_IP5|CAUSEF_IP6);
+ //write_c0_status(status);
+}
+
+#if defined(CONFIG_RTL_8196C) && defined(CONFIG_ARCH_SUSPEND_POSSIBLE)//michaelxxx
+ #define CONFIG_RTL819X_SUSPEND_CHECK_INTERRUPT
+
+ #ifdef CONFIG_RTL819X_SUSPEND_CHECK_INTERRUPT
+ #include <linux/proc_fs.h>
+ #include <linux/kernel_stat.h>
+ #include <asm/uaccess.h>
+ //#define INT_HIGH_WATER_MARK 1850 //for window size = 1, based on LAN->WAN test result
+ //#define INT_LOW_WATER_MARK 1150
+ //#define INT_HIGH_WATER_MARK 9190 //for window size = 5, based on LAN->WAN test result
+ //#define INT_LOW_WATER_MARK 5500
+ #define INT_HIGH_WATER_MARK 3200 //for window size = 5, based on WLAN->WAN test result
+ #define INT_LOW_WATER_MARK 2200
+ #define INT_WINDOW_SIZE_MAX 10
+ static int suspend_check_enable = 1;
+ static int suspend_check_high_water_mark = INT_HIGH_WATER_MARK;
+ static int suspend_check_low_water_mark = INT_LOW_WATER_MARK;
+ static int suspend_check_win_size = 5;
+ static struct timer_list suspend_check_timer;
+ static int index=0;
+ static int eth_int_count[INT_WINDOW_SIZE_MAX];
+ static int wlan_int_count[INT_WINDOW_SIZE_MAX];
+ int cpu_can_suspend = 1;
+ int cpu_can_suspend_check_init = 0;
+
+ static int read_proc_suspend_check(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+ {
+ int len;
+
+ len = sprintf(page, "enable=%d, winsize=%d(%d), high=%d, low=%d, suspend=%d\n",
+ suspend_check_enable, suspend_check_win_size, INT_WINDOW_SIZE_MAX,
+ suspend_check_high_water_mark, suspend_check_low_water_mark, cpu_can_suspend);
+
+ if (len <= off+count)
+ *eof = 1;
+ *start = page + off;
+ len -= off;
+ if (len > count)
+ len = count;
+ if (len < 0)
+ len = 0;
+ return len;
+ }
+
+ static int write_proc_suspend_check(struct file *file, const char *buffer,
+ unsigned long count, void *data)
+ {
+ char tmp[128];
+
+ if (buffer && !copy_from_user(tmp, buffer, 128)) {
+ sscanf(tmp, "%d %d %d %d",
+ &suspend_check_enable, &suspend_check_win_size,
+ &suspend_check_high_water_mark, &suspend_check_low_water_mark);
+ if (suspend_check_win_size >= INT_WINDOW_SIZE_MAX)
+ suspend_check_win_size = INT_WINDOW_SIZE_MAX - 1;
+ if (suspend_check_enable) {
+ mod_timer(&suspend_check_timer, jiffies + 100);
+ }
+ else {
+ del_timer(&suspend_check_timer);
+ }
+ }
+ return count;
+ }
+
+ static void suspend_check_timer_fn(unsigned long arg)
+ {
+ int count, j;
+
+ index++;
+ if (INT_WINDOW_SIZE_MAX <= index)
+ index = 0;
+ eth_int_count[index] = kstat_irqs(BSP_SWCORE_IRQ);
+ wlan_int_count[index] = kstat_irqs(BSP_PCIE_IRQ);
+ j = index - suspend_check_win_size;
+ if (j < 0)
+ j += INT_WINDOW_SIZE_MAX;
+ count = (eth_int_count[index] - eth_int_count[j]) +
+ (wlan_int_count[index]- wlan_int_count[j]); //unit: number of interrupt occurred
+
+ if (cpu_can_suspend) {
+ if (count > suspend_check_high_water_mark) {
+ cpu_can_suspend = 0;
+ //printk("\n<<<RTL8196C LEAVE SLEEP>>>\n"); /* for Debug Only*/
+ }
+ }
+ else {
+ if (count < suspend_check_low_water_mark) {
+ cpu_can_suspend = 1;
+ //printk("\n<<<RTL8196C ENTER SLEEP>>>\n"); /* for Debug Only*/
+ }
+ }
+ #if 0 /* for Debug Only*/
+ printk("###index=%d, count=%d (%d+%d) suspend=%d###\n",index, count,
+ (eth_int_count[index] - eth_int_count[j]),
+ (wlan_int_count[index]- wlan_int_count[j]),
+ cpu_can_suspend);
+ #endif
+ mod_timer(&suspend_check_timer, jiffies + 100);
+ }
+
+ void suspend_check_interrupt_init(void)
+ {
+ struct proc_dir_entry *res;
+ int i;
+
+ res = create_proc_entry("suspend_check", 0, NULL);
+ if (res) {
+ res->read_proc = read_proc_suspend_check;
+ res->write_proc = write_proc_suspend_check;
+ }
+ else {
+ printk("unable to create /proc/suspend_check\n");
+ }
+
+ for (i=0; i<INT_WINDOW_SIZE_MAX; i++) {
+ wlan_int_count[i] = 0;
+ eth_int_count[i] = 0;
+ }
+ init_timer(&suspend_check_timer);
+ suspend_check_timer.data = 0;
+ suspend_check_timer.function = suspend_check_timer_fn;
+ suspend_check_timer.expires = jiffies + 100; /* in jiffies */
+ add_timer(&suspend_check_timer);
+ }
+ #endif // CONFIG_RTL819X_SUSPEND_CHECK_INTERRUPT
+ #endif //CONFIG_RTL8196C
+
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