kernel/arch/m32r/platforms/usrv/setup.c

   1 /*
   2  *  linux/arch/m32r/platforms/usrv/setup.c
   3  *
   4  *  Setup routines for MITSUBISHI uServer
   5  *
   6  *  Copyright (c) 2001, 2002, 2003  Hiroyuki Kondo, Hirokazu Takata,
   7  *                                  Hitoshi Yamamoto
   8  */
   9
  10 #include <linux/irq.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13
  14 #include <asm/m32r.h>
  15 #include <asm/io.h>
  16
  17 #define irq2port(x) (M32R_ICU_CR1_PORTL + ((x - 1) * sizeof(unsigned long)))
  18
  19 icu_data_t icu_data[M32700UT_NUM_CPU_IRQ];
  20
  21 static void disable_mappi_irq(unsigned int irq)
  22 {
  23         unsigned long port, data;
  24
  25         port = irq2port(irq);
  26         data = icu_data[irq].icucr|M32R_ICUCR_ILEVEL7;
  27         outl(data, port);
  28 }
  29
  30 static void enable_mappi_irq(unsigned int irq)
  31 {
  32         unsigned long port, data;
  33
  34         port = irq2port(irq);
  35         data = icu_data[irq].icucr|M32R_ICUCR_IEN|M32R_ICUCR_ILEVEL6;
  36         outl(data, port);
  37 }
  38
  39 static void mask_mappi(struct irq_data *data)
  40 {
  41         disable_mappi_irq(data->irq);
  42 }
  43
  44 static void unmask_mappi(struct irq_data *data)
  45 {
  46         enable_mappi_irq(data->irq);
  47 }
  48
  49 static void shutdown_mappi(struct irq_data *data)
  50 {
  51         unsigned long port;
  52
  53         port = irq2port(data->irq);
  54         outl(M32R_ICUCR_ILEVEL7, port);
  55 }
  56
  57 static struct irq_chip mappi_irq_type =
  58 {
  59         .name           = "M32700-IRQ",
  60         .irq_shutdown   = shutdown_mappi,
  61         .irq_mask       = mask_mappi,
  62         .irq_unmask     = unmask_mappi,
  63 };
  64
  65 /*
  66  * Interrupt Control Unit of PLD on M32700UT (Level 2)
  67  */
  68 #define irq2pldirq(x)           ((x) - M32700UT_PLD_IRQ_BASE)
  69 #define pldirq2port(x)          (unsigned long)((int)PLD_ICUCR1 + \
  70                                  (((x) - 1) * sizeof(unsigned short)))
  71
  72 typedef struct {
  73         unsigned short icucr;  /* ICU Control Register */
  74 } pld_icu_data_t;
  75
  76 static pld_icu_data_t pld_icu_data[M32700UT_NUM_PLD_IRQ];
  77
  78 static void disable_m32700ut_pld_irq(unsigned int irq)
  79 {
  80         unsigned long port, data;
  81         unsigned int pldirq;
  82
  83         pldirq = irq2pldirq(irq);
  84         port = pldirq2port(pldirq);
  85         data = pld_icu_data[pldirq].icucr|PLD_ICUCR_ILEVEL7;
  86         outw(data, port);
  87 }
  88
  89 static void enable_m32700ut_pld_irq(unsigned int irq)
  90 {
  91         unsigned long port, data;
  92         unsigned int pldirq;
  93
  94         pldirq = irq2pldirq(irq);
  95         port = pldirq2port(pldirq);
  96         data = pld_icu_data[pldirq].icucr|PLD_ICUCR_IEN|PLD_ICUCR_ILEVEL6;
  97         outw(data, port);
  98 }
  99
 100 static void mask_m32700ut_pld(struct irq_data *data)
 101 {
 102         disable_m32700ut_pld_irq(data->irq);
 103 }
 104
 105 static void unmask_m32700ut_pld(struct irq_data *data)
 106 {
 107         enable_m32700ut_pld_irq(data->irq);
 108         enable_mappi_irq(M32R_IRQ_INT1);
 109 }
 110
 111 static void shutdown_m32700ut_pld(struct irq_data *data)
 112 {
 113         unsigned long port;
 114         unsigned int pldirq;
 115
 116         pldirq = irq2pldirq(data->irq);
 117         port = pldirq2port(pldirq);
 118         outw(PLD_ICUCR_ILEVEL7, port);
 119 }
 120
 121 static struct irq_chip m32700ut_pld_irq_type =
 122 {
 123         .name           = "USRV-PLD-IRQ",
 124         .irq_shutdown   = shutdown_m32700ut_pld,
 125         .irq_mask       = mask_m32700ut_pld,
 126         .irq_unmask     = unmask_m32700ut_pld,
 127 };
 128
 129 void __init init_IRQ(void)
 130 {
 131         static int once = 0;
 132         int i;
 133
 134         if (once)
 135                 return;
 136         else
 137                 once++;
 138
 139         /* MFT2 : system timer */
 140         irq_set_chip_and_handler(M32R_IRQ_MFT2, &mappi_irq_type,
 141                                  handle_level_irq);
 142         icu_data[M32R_IRQ_MFT2].icucr = M32R_ICUCR_IEN;
 143         disable_mappi_irq(M32R_IRQ_MFT2);
 144
 145 #if defined(CONFIG_SERIAL_M32R_SIO)
 146         /* SIO0_R : uart receive data */
 147         irq_set_chip_and_handler(M32R_IRQ_SIO0_R, &mappi_irq_type,
 148                                  handle_level_irq);
 149         icu_data[M32R_IRQ_SIO0_R].icucr = 0;
 150         disable_mappi_irq(M32R_IRQ_SIO0_R);
 151
 152         /* SIO0_S : uart send data */
 153         irq_set_chip_and_handler(M32R_IRQ_SIO0_S, &mappi_irq_type,
 154                                  handle_level_irq);
 155         icu_data[M32R_IRQ_SIO0_S].icucr = 0;
 156         disable_mappi_irq(M32R_IRQ_SIO0_S);
 157
 158         /* SIO1_R : uart receive data */
 159         irq_set_chip_and_handler(M32R_IRQ_SIO1_R, &mappi_irq_type,
 160                                  handle_level_irq);
 161         icu_data[M32R_IRQ_SIO1_R].icucr = 0;
 162         disable_mappi_irq(M32R_IRQ_SIO1_R);
 163
 164         /* SIO1_S : uart send data */
 165         irq_set_chip_and_handler(M32R_IRQ_SIO1_S, &mappi_irq_type,
 166                                  handle_level_irq);
 167         icu_data[M32R_IRQ_SIO1_S].icucr = 0;
 168         disable_mappi_irq(M32R_IRQ_SIO1_S);
 169 #endif  /* CONFIG_SERIAL_M32R_SIO */
 170
 171         /* INT#67-#71: CFC#0 IREQ on PLD */
 172         for (i = 0 ; i < CONFIG_M32R_CFC_NUM ; i++ ) {
 173                 irq_set_chip_and_handler(PLD_IRQ_CF0 + i,
 174                                          &m32700ut_pld_irq_type,
 175                                          handle_level_irq);
 176                 pld_icu_data[irq2pldirq(PLD_IRQ_CF0 + i)].icucr
 177                         = PLD_ICUCR_ISMOD01;    /* 'L' level sense */
 178                 disable_m32700ut_pld_irq(PLD_IRQ_CF0 + i);
 179         }
 180
 181 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
 182         /* INT#76: 16552D#0 IREQ on PLD */
 183         irq_set_chip_and_handler(PLD_IRQ_UART0, &m32700ut_pld_irq_type,
 184                                  handle_level_irq);
 185         pld_icu_data[irq2pldirq(PLD_IRQ_UART0)].icucr
 186                 = PLD_ICUCR_ISMOD03;    /* 'H' level sense */
 187         disable_m32700ut_pld_irq(PLD_IRQ_UART0);
 188
 189         /* INT#77: 16552D#1 IREQ on PLD */
 190         irq_set_chip_and_handler(PLD_IRQ_UART1, &m32700ut_pld_irq_type,
 191                                  handle_level_irq);
 192         pld_icu_data[irq2pldirq(PLD_IRQ_UART1)].icucr
 193                 = PLD_ICUCR_ISMOD03;    /* 'H' level sense */
 194         disable_m32700ut_pld_irq(PLD_IRQ_UART1);
 195 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
 196
 197 #if defined(CONFIG_IDC_AK4524) || defined(CONFIG_IDC_AK4524_MODULE)
 198         /* INT#80: AK4524 IREQ on PLD */
 199         irq_set_chip_and_handler(PLD_IRQ_SNDINT, &m32700ut_pld_irq_type,
 200                                  handle_level_irq);
 201         pld_icu_data[irq2pldirq(PLD_IRQ_SNDINT)].icucr
 202                 = PLD_ICUCR_ISMOD01;    /* 'L' level sense */
 203         disable_m32700ut_pld_irq(PLD_IRQ_SNDINT);
 204 #endif  /* CONFIG_IDC_AK4524 || CONFIG_IDC_AK4524_MODULE */
 205
 206         /*
 207          * INT1# is used for UART, MMC, CF Controller in FPGA.
 208          * We enable it here.
 209          */
 210         icu_data[M32R_IRQ_INT1].icucr = M32R_ICUCR_ISMOD11;
 211         enable_mappi_irq(M32R_IRQ_INT1);
 212 }