diff options
Diffstat (limited to 'arch/blackfin/mach-bf537/ints-priority.c')
| -rw-r--r-- | arch/blackfin/mach-bf537/ints-priority.c | 163 |
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 f6500622b35d..2137a209a22b 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 +} |