Blackfin: add support for the on-chip MAC status interrupts

This patch provides infrastructure for MAC Wake-On-Lan and PHYINT use in
phylib.  New Interrupts added:

IRQ_MAC_PHYINT   /* PHY_INT Interrupt */
IRQ_MAC_MMCINT   /* MMC Counter Interrupt */
IRQ_MAC_RXFSINT  /* RX Frame-Status Interrupt */
IRQ_MAC_TXFSINT  /* TX Frame-Status Interrupt */
IRQ_MAC_WAKEDET  /* Wake-Up Interrupt */
IRQ_MAC_RXDMAERR /* RX DMA Direction Error Interrupt */
IRQ_MAC_TXDMAERR /* TX DMA Direction Error Interrupt */
IRQ_MAC_STMDONE  /* Station Mgt. Transfer Done Interrupt */

On BF537/6 the implementation is not straight forward since there are now
two chained chained_handlers.  A cleaner approach would have been to add
latter IRQs to the demux of IRQ_GENERIC_ERROR.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/arch/blackfin/mach-bf518/include/mach/irq.h b/arch/blackfin/mach-bf518/include/mach/irq.h
index 52edc84..435e76e 100644 (file)
--- a/arch/blackfin/mach-bf518/include/mach/irq.h
+++ b/arch/blackfin/mach-bf518/include/mach/irq.h
@@ -151,7 +151,16 @@
 
 #define GPIO_IRQ_BASE  IRQ_PF0
 
-#define NR_MACH_IRQS   (IRQ_PH15 + 1)
+#define IRQ_MAC_PHYINT         119 /* PHY_INT Interrupt */
+#define IRQ_MAC_MMCINT         120 /* MMC Counter Interrupt */
+#define IRQ_MAC_RXFSINT                121 /* RX Frame-Status Interrupt */
+#define IRQ_MAC_TXFSINT                122 /* TX Frame-Status Interrupt */
+#define IRQ_MAC_WAKEDET                123 /* Wake-Up Interrupt */
+#define IRQ_MAC_RXDMAERR       124 /* RX DMA Direction Error Interrupt */
+#define IRQ_MAC_TXDMAERR       125 /* TX DMA Direction Error Interrupt */
+#define IRQ_MAC_STMDONE                126 /* Station Mgt. Transfer Done Interrupt */
+
+#define NR_MACH_IRQS   (IRQ_MAC_STMDONE + 1)
 #define NR_IRQS                (NR_MACH_IRQS + NR_SPARE_IRQS)
 
 #define IVG7            7

diff --git a/arch/blackfin/mach-bf527/include/mach/irq.h b/arch/blackfin/mach-bf527/include/mach/irq.h
index 17604b4..704d925 100644 (file)
--- a/arch/blackfin/mach-bf527/include/mach/irq.h
+++ b/arch/blackfin/mach-bf527/include/mach/irq.h
@@ -151,7 +151,16 @@
 
 #define GPIO_IRQ_BASE  IRQ_PF0
 
-#define NR_MACH_IRQS   (IRQ_PH15 + 1)
+#define IRQ_MAC_PHYINT         119 /* PHY_INT Interrupt */
+#define IRQ_MAC_MMCINT         120 /* MMC Counter Interrupt */
+#define IRQ_MAC_RXFSINT                121 /* RX Frame-Status Interrupt */
+#define IRQ_MAC_TXFSINT                122 /* TX Frame-Status Interrupt */
+#define IRQ_MAC_WAKEDET                123 /* Wake-Up Interrupt */
+#define IRQ_MAC_RXDMAERR       124 /* RX DMA Direction Error Interrupt */
+#define IRQ_MAC_TXDMAERR       125 /* TX DMA Direction Error Interrupt */
+#define IRQ_MAC_STMDONE                126 /* Station Mgt. Transfer Done Interrupt */
+
+#define NR_MACH_IRQS   (IRQ_MAC_STMDONE + 1)
 #define NR_IRQS                (NR_MACH_IRQS + NR_SPARE_IRQS)
 
 #define IVG7            7

diff --git a/arch/blackfin/mach-bf537/include/mach/irq.h b/arch/blackfin/mach-bf537/include/mach/irq.h
index 9b2cbca..789a4f2 100644 (file)
--- a/arch/blackfin/mach-bf537/include/mach/irq.h
+++ b/arch/blackfin/mach-bf537/include/mach/irq.h
@@ -134,7 +134,16 @@
 
 #define GPIO_IRQ_BASE  IRQ_PF0
 
-#define NR_MACH_IRQS   (IRQ_PH15 + 1)
+#define IRQ_MAC_PHYINT         98 /* PHY_INT Interrupt */
+#define IRQ_MAC_MMCINT         99 /* MMC Counter Interrupt */
+#define IRQ_MAC_RXFSINT                100 /* RX Frame-Status Interrupt */
+#define IRQ_MAC_TXFSINT                101 /* TX Frame-Status Interrupt */
+#define IRQ_MAC_WAKEDET                102 /* Wake-Up Interrupt */
+#define IRQ_MAC_RXDMAERR       103 /* RX DMA Direction Error Interrupt */
+#define IRQ_MAC_TXDMAERR       104 /* TX DMA Direction Error Interrupt */
+#define IRQ_MAC_STMDONE                105 /* Station Mgt. Transfer Done Interrupt */
+
+#define NR_MACH_IRQS   (IRQ_MAC_STMDONE + 1)
 #define NR_IRQS                (NR_MACH_IRQS + NR_SPARE_IRQS)
 
 #define IVG7            7

diff --git a/arch/blackfin/mach-common/ints-priority.c b/arch/blackfin/mach-common/ints-priority.c
index ebf8860..11c05f3 100644 (file)
--- a/arch/blackfin/mach-common/ints-priority.c
+++ b/arch/blackfin/mach-common/ints-priority.c
@@ -325,7 +325,6 @@ static int error_int_mask;
 static void bfin_generic_error_mask_irq(unsigned int irq)
 {
        error_int_mask &= ~(1L << (irq - IRQ_PPI_ERROR));
-
        if (!error_int_mask)
                bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
 }
@@ -416,6 +415,127 @@ static void bfin_demux_error_irq(unsigned int int_err_irq,
 }
 #endif                         /* BF537_GENERIC_ERROR_INT_DEMUX */
 
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+static int mac_stat_int_mask;
+
+static void bfin_mac_status_ack_irq(unsigned int irq)
+{
+       switch (irq) {
+       case IRQ_MAC_MMCINT:
+               bfin_write_EMAC_MMC_TIRQS(
+                       bfin_read_EMAC_MMC_TIRQE() &
+                       bfin_read_EMAC_MMC_TIRQS());
+               bfin_write_EMAC_MMC_RIRQS(
+                       bfin_read_EMAC_MMC_RIRQE() &
+                       bfin_read_EMAC_MMC_RIRQS());
+               break;
+       case IRQ_MAC_RXFSINT:
+               bfin_write_EMAC_RX_STKY(
+                       bfin_read_EMAC_RX_IRQE() &
+                       bfin_read_EMAC_RX_STKY());
+               break;
+       case IRQ_MAC_TXFSINT:
+               bfin_write_EMAC_TX_STKY(
+                       bfin_read_EMAC_TX_IRQE() &
+                       bfin_read_EMAC_TX_STKY());
+               break;
+       case IRQ_MAC_WAKEDET:
+                bfin_write_EMAC_WKUP_CTL(
+                       bfin_read_EMAC_WKUP_CTL() | MPKS | RWKS);
+               break;
+       default:
+               /* These bits are W1C */
+               bfin_write_EMAC_SYSTAT(1L << (irq - IRQ_MAC_PHYINT));
+               break;
+       }
+}
+
+static void bfin_mac_status_mask_irq(unsigned int irq)
+{
+       mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT));
+#ifdef BF537_GENERIC_ERROR_INT_DEMUX
+       switch (irq) {
+       case IRQ_MAC_PHYINT:
+               bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() & ~PHYIE);
+               break;
+       default:
+               break;
+       }
+#else
+       if (!mac_stat_int_mask)
+               bfin_internal_mask_irq(IRQ_MAC_ERROR);
+#endif
+       bfin_mac_status_ack_irq(irq);
+}
+
+static void bfin_mac_status_unmask_irq(unsigned int irq)
+{
+#ifdef BF537_GENERIC_ERROR_INT_DEMUX
+       switch (irq) {
+       case IRQ_MAC_PHYINT:
+               bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() | PHYIE);
+               break;
+       default:
+               break;
+       }
+#else
+       if (!mac_stat_int_mask)
+               bfin_internal_unmask_irq(IRQ_MAC_ERROR);
+#endif
+       mac_stat_int_mask |= 1L << (irq - IRQ_MAC_PHYINT);
+}
+
+#ifdef CONFIG_PM
+int bfin_mac_status_set_wake(unsigned int irq, unsigned int state)
+{
+#ifdef BF537_GENERIC_ERROR_INT_DEMUX
+       return bfin_internal_set_wake(IRQ_GENERIC_ERROR, state);
+#else
+       return bfin_internal_set_wake(IRQ_MAC_ERROR, state);
+#endif
+}
+#endif
+
+static struct irq_chip bfin_mac_status_irqchip = {
+       .name = "MACST",
+       .ack = bfin_ack_noop,
+       .mask_ack = bfin_mac_status_mask_irq,
+       .mask = bfin_mac_status_mask_irq,
+       .unmask = bfin_mac_status_unmask_irq,
+#ifdef CONFIG_PM
+       .set_wake = bfin_mac_status_set_wake,
+#endif
+};
+
+static void bfin_demux_mac_status_irq(unsigned int int_err_irq,
+                                struct irq_desc *inta_desc)
+{
+       int i, irq = 0;
+       u32 status = bfin_read_EMAC_SYSTAT();
+
+       for (i = 0; i < (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++)
+               if (status & (1L << i)) {
+                       irq = IRQ_MAC_PHYINT + i;
+                       break;
+               }
+
+       if (irq) {
+               if (mac_stat_int_mask & (1L << (irq - IRQ_MAC_PHYINT))) {
+                       bfin_handle_irq(irq);
+               } else {
+                       bfin_mac_status_ack_irq(irq);
+                       pr_debug("IRQ %d:"
+                                " MASKED MAC ERROR INTERRUPT ASSERTED\n",
+                                irq);
+               }
+       } else
+               printk(KERN_ERR
+                      "%s : %s : LINE %d :\nIRQ ?: MAC ERROR"
+                      " INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
+                      __func__, __FILE__, __LINE__);
+}
+#endif
+
 static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle)
 {
 #ifdef CONFIG_IPIPE
@@ -1070,7 +1190,11 @@ int __init init_arch_irq(void)
                        set_irq_chained_handler(irq, bfin_demux_error_irq);
                        break;
 #endif
-
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+               case IRQ_MAC_ERROR:
+                       set_irq_chained_handler(irq, bfin_demux_mac_status_irq);
+                       break;
+#endif
 #ifdef CONFIG_SMP
                case IRQ_SUPPLE_0:
                case IRQ_SUPPLE_1:
@@ -1111,14 +1235,22 @@ int __init init_arch_irq(void)
        for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
                set_irq_chip_and_handler(irq, &bfin_generic_error_irqchip,
                                         handle_level_irq);
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+       set_irq_chained_handler(IRQ_MAC_ERROR, bfin_demux_mac_status_irq);
+#endif
 #endif
 
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+       for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++)
+               set_irq_chip_and_handler(irq, &bfin_mac_status_irqchip,
+                                        handle_level_irq);
+#endif
        /* if configured as edge, then will be changed to do_edge_IRQ */
-       for (irq = GPIO_IRQ_BASE; irq < NR_MACH_IRQS; irq++)
+       for (irq = GPIO_IRQ_BASE;
+               irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++)
                set_irq_chip_and_handler(irq, &bfin_gpio_irqchip,
                                         handle_level_irq);
 
-
        bfin_write_IMASK(0);
        CSYNC();
        ilat = bfin_read_ILAT();