1 files changed, 163 insertions, 0 deletions

diff --git a/arch/blackfin/mach-bf537/ints-priority.c b/arch/blackfin/mach-bf537/ints-priority.c
index f6500622b35..2137a209a22 100644
--- a/arch/blackfin/mach-bf537/ints-priority.c
+++ b/arch/blackfin/mach-bf537/ints-priority.c
@@ -10,6 +10,13 @@
 #include <linux/irq.h>
 #include <asm/blackfin.h>
 
+#include <asm/irq_handler.h>
+#include <asm/bfin5xx_spi.h>
+#include <asm/bfin_sport.h>
+#include <asm/bfin_can.h>
+#include <asm/bfin_dma.h>
+#include <asm/dpmc.h>
+
 void __init program_IAR(void)
 {
         /* Program the IAR0 Register with the configured priority */
@@ -51,3 +58,159 @@ void __init program_IAR(void)
 
         SSYNC();
 }
+
+#define SPI_ERR_MASK   (BIT_STAT_TXCOL | BIT_STAT_RBSY | BIT_STAT_MODF | BIT_STAT_TXE)  /* SPI_STAT */
+#define SPORT_ERR_MASK (ROVF | RUVF | TOVF | TUVF)      /* SPORT_STAT */
+#define PPI_ERR_MASK   (0xFFFF & ~FLD)  /* PPI_STATUS */
+#define EMAC_ERR_MASK  (PHYINT | MMCINT | RXFSINT | TXFSINT | WAKEDET | RXDMAERR | TXDMAERR | STMDONE)  /* EMAC_SYSTAT */
+#define UART_ERR_MASK  (0x6)    /* UART_IIR */
+#define CAN_ERR_MASK   (EWTIF | EWRIF | EPIF | BOIF | WUIF | UIAIF | AAIF | RMLIF | UCEIF | EXTIF | ADIF)       /* CAN_GIF */
+
+static int error_int_mask;
+
+static void bf537_generic_error_mask_irq(struct irq_data *d)
+{
+        error_int_mask &= ~(1L << (d->irq - IRQ_PPI_ERROR));
+        if (!error_int_mask)
+                bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
+}
+
+static void bf537_generic_error_unmask_irq(struct irq_data *d)
+{
+        bfin_internal_unmask_irq(IRQ_GENERIC_ERROR);
+        error_int_mask |= 1L << (d->irq - IRQ_PPI_ERROR);
+}
+
+static struct irq_chip bf537_generic_error_irqchip = {
+        .name = "ERROR",
+        .irq_ack = bfin_ack_noop,
+        .irq_mask_ack = bf537_generic_error_mask_irq,
+        .irq_mask = bf537_generic_error_mask_irq,
+        .irq_unmask = bf537_generic_error_unmask_irq,
+};
+
+static void bf537_demux_error_irq(unsigned int int_err_irq,
+                                  struct irq_desc *inta_desc)
+{
+        int irq = 0;
+
+#if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
+        if (bfin_read_EMAC_SYSTAT() & EMAC_ERR_MASK)
+                irq = IRQ_MAC_ERROR;
+        else
+#endif
+        if (bfin_read_SPORT0_STAT() & SPORT_ERR_MASK)
+                irq = IRQ_SPORT0_ERROR;
+        else if (bfin_read_SPORT1_STAT() & SPORT_ERR_MASK)
+                irq = IRQ_SPORT1_ERROR;
+        else if (bfin_read_PPI_STATUS() & PPI_ERR_MASK)
+                irq = IRQ_PPI_ERROR;
+        else if (bfin_read_CAN_GIF() & CAN_ERR_MASK)
+                irq = IRQ_CAN_ERROR;
+        else if (bfin_read_SPI_STAT() & SPI_ERR_MASK)
+                irq = IRQ_SPI_ERROR;
+        else if ((bfin_read_UART0_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
+                irq = IRQ_UART0_ERROR;
+        else if ((bfin_read_UART1_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
+                irq = IRQ_UART1_ERROR;
+
+        if (irq) {
+                if (error_int_mask & (1L << (irq - IRQ_PPI_ERROR)))
+                        bfin_handle_irq(irq);
+                else {
+
+                        switch (irq) {
+                        case IRQ_PPI_ERROR:
+                                bfin_write_PPI_STATUS(PPI_ERR_MASK);
+                                break;
+#if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
+                        case IRQ_MAC_ERROR:
+                                bfin_write_EMAC_SYSTAT(EMAC_ERR_MASK);
+                                break;
+#endif
+                        case IRQ_SPORT0_ERROR:
+                                bfin_write_SPORT0_STAT(SPORT_ERR_MASK);
+                                break;
+
+                        case IRQ_SPORT1_ERROR:
+                                bfin_write_SPORT1_STAT(SPORT_ERR_MASK);
+                                break;
+
+                        case IRQ_CAN_ERROR:
+                                bfin_write_CAN_GIS(CAN_ERR_MASK);
+                                break;
+
+                        case IRQ_SPI_ERROR:
+                                bfin_write_SPI_STAT(SPI_ERR_MASK);
+                                break;
+
+                        default:
+                                break;
+                        }
+
+                        pr_debug("IRQ %d:"
+                                 " MASKED PERIPHERAL ERROR INTERRUPT ASSERTED\n",
+                                 irq);
+                }
+        } else
+                pr_err("%s: IRQ ?: PERIPHERAL ERROR INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
+                       __func__);
+
+}
+
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+static int mac_rx_int_mask;
+
+static void bf537_mac_rx_mask_irq(struct irq_data *d)
+{
+        mac_rx_int_mask &= ~(1L << (d->irq - IRQ_MAC_RX));
+        if (!mac_rx_int_mask)
+                bfin_internal_mask_irq(IRQ_PH_INTA_MAC_RX);
+}
+
+static void bf537_mac_rx_unmask_irq(struct irq_data *d)
+{
+        bfin_internal_unmask_irq(IRQ_PH_INTA_MAC_RX);
+        mac_rx_int_mask |= 1L << (d->irq - IRQ_MAC_RX);
+}
+
+static struct irq_chip bf537_mac_rx_irqchip = {
+        .name = "ERROR",
+        .irq_ack = bfin_ack_noop,
+        .irq_mask_ack = bf537_mac_rx_mask_irq,
+        .irq_mask = bf537_mac_rx_mask_irq,
+        .irq_unmask = bf537_mac_rx_unmask_irq,
+};
+
+static void bf537_demux_mac_rx_irq(unsigned int int_irq,
+                                   struct irq_desc *desc)
+{
+        if (bfin_read_DMA1_IRQ_STATUS() & (DMA_DONE | DMA_ERR))
+                bfin_handle_irq(IRQ_MAC_RX);
+        else
+                bfin_demux_gpio_irq(int_irq, desc);
+}
+#endif
+
+void __init init_mach_irq(void)
+{
+        int irq;
+
+#if defined(CONFIG_BF537) || defined(CONFIG_BF536)
+        /* Clear EMAC Interrupt Status bits so we can demux it later */
+        bfin_write_EMAC_SYSTAT(-1);
+#endif
+
+        irq_set_chained_handler(IRQ_GENERIC_ERROR, bf537_demux_error_irq);
+        for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
+                irq_set_chip_and_handler(irq, &bf537_generic_error_irqchip,
+                                         handle_level_irq);
+
+#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
+        irq_set_chained_handler(IRQ_PH_INTA_MAC_RX, bf537_demux_mac_rx_irq);
+        irq_set_chip_and_handler(IRQ_MAC_RX, &bf537_mac_rx_irqchip, handle_level_irq);
+        irq_set_chip_and_handler(IRQ_PORTH_INTA, &bf537_mac_rx_irqchip, handle_level_irq);
+
+        irq_set_chained_handler(IRQ_MAC_ERROR, bfin_demux_mac_status_irq);
+#endif
+}