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Commit 5047201b authored by Manuel Lauss's avatar Manuel Lauss Committed by Ralf Baechle
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MIPS: Alchemy: Remove USB_DEV_REQ_INT prioritization hack 

The Alchemy hardware provides a method to prioritize interrupts
on a controller by assigning them to a differenct core request line.
Assign usb device request interrupt to IC0 Request 0 (which has
highest priority in the core and the dispatcher) and others to
Request 1.  The explicit check for usb device request occurrence
should be obsolete now.
Signed-off-by: default avatarManuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 0273b4ef
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Showing with 22 additions and 28 deletions
arch/mips/alchemy/common/irq.c
View file @ 5047201b
...@@ -39,11 +39,18 @@ ...@@ -39,11 +39,18 @@
static int au1x_ic_settype(unsigned int irq, unsigned int flow_type); static int au1x_ic_settype(unsigned int irq, unsigned int flow_type);
/* NOTE on interrupt priorities: The original writers of this code said:
*
* Because of the tight timing of SETUP token to reply transactions,
* the USB devices-side packet complete interrupt (USB_DEV_REQ_INT)
* needs the highest priority.
*/
/* per-processor fixed function irqs */ /* per-processor fixed function irqs */
struct au1xxx_irqmap { struct au1xxx_irqmap {
int im_irq; int im_irq;
int im_type; int im_type;
int im_request; int im_request; /* set 1 to get higher priority */
} au1xxx_ic0_map[] __initdata = { } au1xxx_ic0_map[] __initdata = {
#if defined(CONFIG_SOC_AU1000) #if defined(CONFIG_SOC_AU1000)
{ AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_UART0_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
...@@ -63,14 +70,14 @@ struct au1xxx_irqmap { ...@@ -63,14 +70,14 @@ struct au1xxx_irqmap {
{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 }, { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 }, { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
...@@ -97,12 +104,12 @@ struct au1xxx_irqmap { ...@@ -97,12 +104,12 @@ struct au1xxx_irqmap {
{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 }, { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 }, { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
...@@ -129,14 +136,14 @@ struct au1xxx_irqmap { ...@@ -129,14 +136,14 @@ struct au1xxx_irqmap {
{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 }, { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_IRDA_TX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_IRDA_RX_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
{ AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1000_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 }, { AU1000_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_ACSYNC_INT, IRQ_TYPE_EDGE_RISING, 0 },
...@@ -163,13 +170,13 @@ struct au1xxx_irqmap { ...@@ -163,13 +170,13 @@ struct au1xxx_irqmap {
{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 }, { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1550_NAND_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1550_USB_DEV_REQ_INT, IRQ_TYPE_LEVEL_HIGH, 1 },
{ AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1550_USB_DEV_SUS_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 }, { AU1550_USB_HOST_INT, IRQ_TYPE_LEVEL_LOW, 0 },
{ AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 }, { AU1550_MAC0_DMA_INT, IRQ_TYPE_LEVEL_HIGH, 0 },
...@@ -191,7 +198,7 @@ struct au1xxx_irqmap { ...@@ -191,7 +198,7 @@ struct au1xxx_irqmap {
{ AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_TOY_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 1 }, { AU1000_TOY_MATCH2_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH0_INT, IRQ_TYPE_EDGE_RISING, 0 },
{ AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 }, { AU1000_RTC_MATCH1_INT, IRQ_TYPE_EDGE_RISING, 0 },
...@@ -507,7 +514,7 @@ static int au1x_ic_settype(unsigned int irq, unsigned int flow_type) ...@@ -507,7 +514,7 @@ static int au1x_ic_settype(unsigned int irq, unsigned int flow_type)
asmlinkage void plat_irq_dispatch(void) asmlinkage void plat_irq_dispatch(void)
{ {
unsigned int pending = read_c0_status() & read_c0_cause(); unsigned int pending = read_c0_status() & read_c0_cause();
unsigned long s, off, bit; unsigned long s, off;
if (pending & CAUSEF_IP7) { if (pending & CAUSEF_IP7) {
do_IRQ(MIPS_CPU_IRQ_BASE + 7); do_IRQ(MIPS_CPU_IRQ_BASE + 7);
...@@ -527,25 +534,12 @@ asmlinkage void plat_irq_dispatch(void) ...@@ -527,25 +534,12 @@ asmlinkage void plat_irq_dispatch(void)
} else } else
goto spurious; goto spurious;
bit = 0;
s = au_readl(s); s = au_readl(s);
if (unlikely(!s)) { if (unlikely(!s)) {
spurious: spurious:
spurious_interrupt(); spurious_interrupt();
return; return;
} }
#ifdef AU1000_USB_DEV_REQ_INT
/*
* Because of the tight timing of SETUP token to reply
* transactions, the USB devices-side packet complete
* interrupt needs the highest priority.
*/
bit = 1 << (AU1000_USB_DEV_REQ_INT - AU1000_INTC0_INT_BASE);
if ((pending & CAUSEF_IP2) && (s & bit)) {
do_IRQ(AU1000_USB_DEV_REQ_INT);
return;
}
#endif
do_IRQ(__ffs(s) + off); do_IRQ(__ffs(s) + off);
} }
...@@ -566,11 +560,11 @@ static void __init setup_irqmap(struct au1xxx_irqmap *map, int count) ...@@ -566,11 +560,11 @@ static void __init setup_irqmap(struct au1xxx_irqmap *map, int count)
if (irq_nr >= AU1000_INTC1_INT_BASE) { if (irq_nr >= AU1000_INTC1_INT_BASE) {
bit = irq_nr - AU1000_INTC1_INT_BASE; bit = irq_nr - AU1000_INTC1_INT_BASE;
if (map[count].im_request) if (map[count].im_request)
au_writel(1 << bit, IC1_ASSIGNCLR); au_writel(1 << bit, IC1_ASSIGNSET);
} else { } else {
bit = irq_nr - AU1000_INTC0_INT_BASE; bit = irq_nr - AU1000_INTC0_INT_BASE;
if (map[count].im_request) if (map[count].im_request)
au_writel(1 << bit, IC0_ASSIGNCLR); au_writel(1 << bit, IC0_ASSIGNSET);
} }
au1x_ic_settype(irq_nr, map[count].im_type); au1x_ic_settype(irq_nr, map[count].im_type);
...@@ -588,7 +582,7 @@ void __init arch_init_irq(void) ...@@ -588,7 +582,7 @@ void __init arch_init_irq(void)
au_writel(0xffffffff, IC0_CFG1CLR); au_writel(0xffffffff, IC0_CFG1CLR);
au_writel(0xffffffff, IC0_CFG2CLR); au_writel(0xffffffff, IC0_CFG2CLR);
au_writel(0xffffffff, IC0_MASKCLR); au_writel(0xffffffff, IC0_MASKCLR);
au_writel(0xffffffff, IC0_ASSIGNSET); au_writel(0xffffffff, IC0_ASSIGNCLR);
au_writel(0xffffffff, IC0_WAKECLR); au_writel(0xffffffff, IC0_WAKECLR);
au_writel(0xffffffff, IC0_SRCSET); au_writel(0xffffffff, IC0_SRCSET);
au_writel(0xffffffff, IC0_FALLINGCLR); au_writel(0xffffffff, IC0_FALLINGCLR);
...@@ -599,7 +593,7 @@ void __init arch_init_irq(void) ...@@ -599,7 +593,7 @@ void __init arch_init_irq(void)
au_writel(0xffffffff, IC1_CFG1CLR); au_writel(0xffffffff, IC1_CFG1CLR);
au_writel(0xffffffff, IC1_CFG2CLR); au_writel(0xffffffff, IC1_CFG2CLR);
au_writel(0xffffffff, IC1_MASKCLR); au_writel(0xffffffff, IC1_MASKCLR);
au_writel(0xffffffff, IC1_ASSIGNSET); au_writel(0xffffffff, IC1_ASSIGNCLR);
au_writel(0xffffffff, IC1_WAKECLR); au_writel(0xffffffff, IC1_WAKECLR);
au_writel(0xffffffff, IC1_SRCSET); au_writel(0xffffffff, IC1_SRCSET);
au_writel(0xffffffff, IC1_FALLINGCLR); au_writel(0xffffffff, IC1_FALLINGCLR);
......
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