arch/blackfin/mach-bf537/ints-priority.c

   1 /*
   2  * Copyright 2005-2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  *
   6  * Set up the interrupt priorities
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/irq.h>
  11 #include <asm/blackfin.h>
  12
  13 #include <asm/irq_handler.h>
  14 #include <asm/bfin5xx_spi.h>
  15 #include <asm/bfin_sport.h>
  16 #include <asm/bfin_can.h>
  17 #include <asm/dpmc.h>
  18
  19 void __init program_IAR(void)
  20 {
  21         /* Program the IAR0 Register with the configured priority */
  22         bfin_write_SIC_IAR0(((CONFIG_IRQ_PLL_WAKEUP - 7) << IRQ_PLL_WAKEUP_POS) |
  23                             ((CONFIG_IRQ_DMA_ERROR - 7) << IRQ_DMA_ERROR_POS) |
  24                             ((CONFIG_IRQ_ERROR - 7) << IRQ_ERROR_POS) |
  25                             ((CONFIG_IRQ_RTC - 7) << IRQ_RTC_POS) |
  26                             ((CONFIG_IRQ_PPI - 7) << IRQ_PPI_POS) |
  27                             ((CONFIG_IRQ_SPORT0_RX - 7) << IRQ_SPORT0_RX_POS) |
  28                             ((CONFIG_IRQ_SPORT0_TX - 7) << IRQ_SPORT0_TX_POS) |
  29                             ((CONFIG_IRQ_SPORT1_RX - 7) << IRQ_SPORT1_RX_POS));
  30
  31         bfin_write_SIC_IAR1(((CONFIG_IRQ_SPORT1_TX - 7) << IRQ_SPORT1_TX_POS) |
  32                             ((CONFIG_IRQ_TWI - 7) << IRQ_TWI_POS) |
  33                             ((CONFIG_IRQ_SPI - 7) << IRQ_SPI_POS) |
  34                             ((CONFIG_IRQ_UART0_RX - 7) << IRQ_UART0_RX_POS) |
  35                             ((CONFIG_IRQ_UART0_TX - 7) << IRQ_UART0_TX_POS) |
  36                             ((CONFIG_IRQ_UART1_RX - 7) << IRQ_UART1_RX_POS) |
  37                             ((CONFIG_IRQ_UART1_TX - 7) << IRQ_UART1_TX_POS) |
  38                             ((CONFIG_IRQ_CAN_RX - 7) << IRQ_CAN_RX_POS));
  39
  40         bfin_write_SIC_IAR2(((CONFIG_IRQ_CAN_TX - 7) << IRQ_CAN_TX_POS) |
  41                             ((CONFIG_IRQ_MAC_RX - 7) << IRQ_MAC_RX_POS) |
  42                             ((CONFIG_IRQ_MAC_TX - 7) << IRQ_MAC_TX_POS) |
  43                             ((CONFIG_IRQ_TIMER0 - 7) << IRQ_TIMER0_POS) |
  44                             ((CONFIG_IRQ_TIMER1 - 7) << IRQ_TIMER1_POS) |
  45                             ((CONFIG_IRQ_TIMER2 - 7) << IRQ_TIMER2_POS) |
  46                             ((CONFIG_IRQ_TIMER3 - 7) << IRQ_TIMER3_POS) |
  47                             ((CONFIG_IRQ_TIMER4 - 7) << IRQ_TIMER4_POS));
  48
  49         bfin_write_SIC_IAR3(((CONFIG_IRQ_TIMER5 - 7) << IRQ_TIMER5_POS) |
  50                             ((CONFIG_IRQ_TIMER6 - 7) << IRQ_TIMER6_POS) |
  51                             ((CONFIG_IRQ_TIMER7 - 7) << IRQ_TIMER7_POS) |
  52                             ((CONFIG_IRQ_PROG_INTA - 7) << IRQ_PROG_INTA_POS) |
  53                             ((CONFIG_IRQ_PORTG_INTB - 7) << IRQ_PORTG_INTB_POS) |
  54                             ((CONFIG_IRQ_MEM_DMA0 - 7) << IRQ_MEM_DMA0_POS) |
  55                             ((CONFIG_IRQ_MEM_DMA1 - 7) << IRQ_MEM_DMA1_POS) |
  56                             ((CONFIG_IRQ_WATCH - 7) << IRQ_WATCH_POS));
  57
  58         SSYNC();
  59 }
  60
  61 #define SPI_ERR_MASK   (BIT_STAT_TXCOL | BIT_STAT_RBSY | BIT_STAT_MODF | BIT_STAT_TXE)  /* SPI_STAT */
  62 #define SPORT_ERR_MASK (ROVF | RUVF | TOVF | TUVF)      /* SPORT_STAT */
  63 #define PPI_ERR_MASK   (0xFFFF & ~FLD)  /* PPI_STATUS */
  64 #define EMAC_ERR_MASK  (PHYINT | MMCINT | RXFSINT | TXFSINT | WAKEDET | RXDMAERR | TXDMAERR | STMDONE)  /* EMAC_SYSTAT */
  65 #define UART_ERR_MASK  (0x6)    /* UART_IIR */
  66 #define CAN_ERR_MASK   (EWTIF | EWRIF | EPIF | BOIF | WUIF | UIAIF | AAIF | RMLIF | UCEIF | EXTIF | ADIF)       /* CAN_GIF */
  67
  68 static int error_int_mask;
  69
  70 static void bf537_generic_error_mask_irq(struct irq_data *d)
  71 {
  72         error_int_mask &= ~(1L << (d->irq - IRQ_PPI_ERROR));
  73         if (!error_int_mask)
  74                 bfin_internal_mask_irq(IRQ_GENERIC_ERROR);
  75 }
  76
  77 static void bf537_generic_error_unmask_irq(struct irq_data *d)
  78 {
  79         bfin_internal_unmask_irq(IRQ_GENERIC_ERROR);
  80         error_int_mask |= 1L << (d->irq - IRQ_PPI_ERROR);
  81 }
  82
  83 static struct irq_chip bf537_generic_error_irqchip = {
  84         .name = "ERROR",
  85         .irq_ack = bfin_ack_noop,
  86         .irq_mask_ack = bf537_generic_error_mask_irq,
  87         .irq_mask = bf537_generic_error_mask_irq,
  88         .irq_unmask = bf537_generic_error_unmask_irq,
  89 };
  90
  91 static void bf537_demux_error_irq(unsigned int int_err_irq,
  92                                   struct irq_desc *inta_desc)
  93 {
  94         int irq = 0;
  95
  96 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
  97         if (bfin_read_EMAC_SYSTAT() & EMAC_ERR_MASK)
  98                 irq = IRQ_MAC_ERROR;
  99         else
 100 #endif
 101         if (bfin_read_SPORT0_STAT() & SPORT_ERR_MASK)
 102                 irq = IRQ_SPORT0_ERROR;
 103         else if (bfin_read_SPORT1_STAT() & SPORT_ERR_MASK)
 104                 irq = IRQ_SPORT1_ERROR;
 105         else if (bfin_read_PPI_STATUS() & PPI_ERR_MASK)
 106                 irq = IRQ_PPI_ERROR;
 107         else if (bfin_read_CAN_GIF() & CAN_ERR_MASK)
 108                 irq = IRQ_CAN_ERROR;
 109         else if (bfin_read_SPI_STAT() & SPI_ERR_MASK)
 110                 irq = IRQ_SPI_ERROR;
 111         else if ((bfin_read_UART0_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
 112                 irq = IRQ_UART0_ERROR;
 113         else if ((bfin_read_UART1_IIR() & UART_ERR_MASK) == UART_ERR_MASK)
 114                 irq = IRQ_UART1_ERROR;
 115
 116         if (irq) {
 117                 if (error_int_mask & (1L << (irq - IRQ_PPI_ERROR)))
 118                         bfin_handle_irq(irq);
 119                 else {
 120
 121                         switch (irq) {
 122                         case IRQ_PPI_ERROR:
 123                                 bfin_write_PPI_STATUS(PPI_ERR_MASK);
 124                                 break;
 125 #if (defined(CONFIG_BF537) || defined(CONFIG_BF536))
 126                         case IRQ_MAC_ERROR:
 127                                 bfin_write_EMAC_SYSTAT(EMAC_ERR_MASK);
 128                                 break;
 129 #endif
 130                         case IRQ_SPORT0_ERROR:
 131                                 bfin_write_SPORT0_STAT(SPORT_ERR_MASK);
 132                                 break;
 133
 134                         case IRQ_SPORT1_ERROR:
 135                                 bfin_write_SPORT1_STAT(SPORT_ERR_MASK);
 136                                 break;
 137
 138                         case IRQ_CAN_ERROR:
 139                                 bfin_write_CAN_GIS(CAN_ERR_MASK);
 140                                 break;
 141
 142                         case IRQ_SPI_ERROR:
 143                                 bfin_write_SPI_STAT(SPI_ERR_MASK);
 144                                 break;
 145
 146                         default:
 147                                 break;
 148                         }
 149
 150                         pr_debug("IRQ %d:"
 151                                  " MASKED PERIPHERAL ERROR INTERRUPT ASSERTED\n",
 152                                  irq);
 153                 }
 154         } else
 155                 pr_err("%s: IRQ ?: PERIPHERAL ERROR INTERRUPT ASSERTED BUT NO SOURCE FOUND\n",
 156                        __func__);
 157
 158 }
 159
 160 void __init init_mach_irq(void)
 161 {
 162         int irq;
 163
 164 #if defined(CONFIG_BF537) || defined(CONFIG_BF536)
 165         /* Clear EMAC Interrupt Status bits so we can demux it later */
 166         bfin_write_EMAC_SYSTAT(-1);
 167 #endif
 168
 169         irq_set_chained_handler(IRQ_GENERIC_ERROR, bf537_demux_error_irq);
 170         for (irq = IRQ_PPI_ERROR; irq <= IRQ_UART1_ERROR; irq++)
 171                 irq_set_chip_and_handler(irq, &bf537_generic_error_irqchip,
 172                                          handle_level_irq);
 173
 174 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
 175         irq_set_chained_handler(IRQ_MAC_ERROR, bfin_demux_mac_status_irq);
 176 #endif
 177 }