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   1 /*
   2  *  linux/arch/m32r/kernel/setup_usrv.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/system.h>
  15 #include <asm/m32r.h>
  16 #include <asm/io.h>
  17
  18 #define irq2port(x) (M32R_ICU_CR1_PORTL + ((x - 1) * sizeof(unsigned long)))
  19
  20 icu_data_t icu_data[M32700UT_NUM_CPU_IRQ];
  21
  22 static void disable_mappi_irq(unsigned int irq)
  23 {
  24         unsigned long port, data;
  25
  26         port = irq2port(irq);
  27         data = icu_data[irq].icucr|M32R_ICUCR_ILEVEL7;
  28         outl(data, port);
  29 }
  30
  31 static void enable_mappi_irq(unsigned int irq)
  32 {
  33         unsigned long port, data;
  34
  35         port = irq2port(irq);
  36         data = icu_data[irq].icucr|M32R_ICUCR_IEN|M32R_ICUCR_ILEVEL6;
  37         outl(data, port);
  38 }
  39
  40 static void mask_and_ack_mappi(unsigned int irq)
  41 {
  42         disable_mappi_irq(irq);
  43 }
  44
  45 static void end_mappi_irq(unsigned int irq)
  46 {
  47         enable_mappi_irq(irq);
  48 }
  49
  50 static unsigned int startup_mappi_irq(unsigned int irq)
  51 {
  52         enable_mappi_irq(irq);
  53         return 0;
  54 }
  55
  56 static void shutdown_mappi_irq(unsigned int irq)
  57 {
  58         unsigned long port;
  59
  60         port = irq2port(irq);
  61         outl(M32R_ICUCR_ILEVEL7, port);
  62 }
  63
  64 static struct hw_interrupt_type mappi_irq_type =
  65 {
  66         .typename = "M32700-IRQ",
  67         .startup = startup_mappi_irq,
  68         .shutdown = shutdown_mappi_irq,
  69         .enable = enable_mappi_irq,
  70         .disable = disable_mappi_irq,
  71         .ack = mask_and_ack_mappi,
  72         .end = end_mappi_irq
  73 };
  74
  75 /*
  76  * Interrupt Control Unit of PLD on M32700UT (Level 2)
  77  */
  78 #define irq2pldirq(x)           ((x) - M32700UT_PLD_IRQ_BASE)
  79 #define pldirq2port(x)          (unsigned long)((int)PLD_ICUCR1 + \
  80                                  (((x) - 1) * sizeof(unsigned short)))
  81
  82 typedef struct {
  83         unsigned short icucr;  /* ICU Control Register */
  84 } pld_icu_data_t;
  85
  86 static pld_icu_data_t pld_icu_data[M32700UT_NUM_PLD_IRQ];
  87
  88 static void disable_m32700ut_pld_irq(unsigned int irq)
  89 {
  90         unsigned long port, data;
  91         unsigned int pldirq;
  92
  93         pldirq = irq2pldirq(irq);
  94         port = pldirq2port(pldirq);
  95         data = pld_icu_data[pldirq].icucr|PLD_ICUCR_ILEVEL7;
  96         outw(data, port);
  97 }
  98
  99 static void enable_m32700ut_pld_irq(unsigned int irq)
 100 {
 101         unsigned long port, data;
 102         unsigned int pldirq;
 103
 104         pldirq = irq2pldirq(irq);
 105         port = pldirq2port(pldirq);
 106         data = pld_icu_data[pldirq].icucr|PLD_ICUCR_IEN|PLD_ICUCR_ILEVEL6;
 107         outw(data, port);
 108 }
 109
 110 static void mask_and_ack_m32700ut_pld(unsigned int irq)
 111 {
 112         disable_m32700ut_pld_irq(irq);
 113 }
 114
 115 static void end_m32700ut_pld_irq(unsigned int irq)
 116 {
 117         enable_m32700ut_pld_irq(irq);
 118         end_mappi_irq(M32R_IRQ_INT1);
 119 }
 120
 121 static unsigned int startup_m32700ut_pld_irq(unsigned int irq)
 122 {
 123         enable_m32700ut_pld_irq(irq);
 124         return 0;
 125 }
 126
 127 static void shutdown_m32700ut_pld_irq(unsigned int irq)
 128 {
 129         unsigned long port;
 130         unsigned int pldirq;
 131
 132         pldirq = irq2pldirq(irq);
 133         port = pldirq2port(pldirq);
 134         outw(PLD_ICUCR_ILEVEL7, port);
 135 }
 136
 137 static struct hw_interrupt_type m32700ut_pld_irq_type =
 138 {
 139         .typename = "USRV-PLD-IRQ",
 140         .startup = startup_m32700ut_pld_irq,
 141         .shutdown = shutdown_m32700ut_pld_irq,
 142         .enable = enable_m32700ut_pld_irq,
 143         .disable = disable_m32700ut_pld_irq,
 144         .ack = mask_and_ack_m32700ut_pld,
 145         .end = end_m32700ut_pld_irq
 146 };
 147
 148 void __init init_IRQ(void)
 149 {
 150         static int once = 0;
 151         int i;
 152
 153         if (once)
 154                 return;
 155         else
 156                 once++;
 157
 158         /* MFT2 : system timer */
 159         irq_desc[M32R_IRQ_MFT2].status = IRQ_DISABLED;
 160         irq_desc[M32R_IRQ_MFT2].chip = &mappi_irq_type;
 161         irq_desc[M32R_IRQ_MFT2].action = 0;
 162         irq_desc[M32R_IRQ_MFT2].depth = 1;
 163         icu_data[M32R_IRQ_MFT2].icucr = M32R_ICUCR_IEN;
 164         disable_mappi_irq(M32R_IRQ_MFT2);
 165
 166 #if defined(CONFIG_SERIAL_M32R_SIO)
 167         /* SIO0_R : uart receive data */
 168         irq_desc[M32R_IRQ_SIO0_R].status = IRQ_DISABLED;
 169         irq_desc[M32R_IRQ_SIO0_R].chip = &mappi_irq_type;
 170         irq_desc[M32R_IRQ_SIO0_R].action = 0;
 171         irq_desc[M32R_IRQ_SIO0_R].depth = 1;
 172         icu_data[M32R_IRQ_SIO0_R].icucr = 0;
 173         disable_mappi_irq(M32R_IRQ_SIO0_R);
 174
 175         /* SIO0_S : uart send data */
 176         irq_desc[M32R_IRQ_SIO0_S].status = IRQ_DISABLED;
 177         irq_desc[M32R_IRQ_SIO0_S].chip = &mappi_irq_type;
 178         irq_desc[M32R_IRQ_SIO0_S].action = 0;
 179         irq_desc[M32R_IRQ_SIO0_S].depth = 1;
 180         icu_data[M32R_IRQ_SIO0_S].icucr = 0;
 181         disable_mappi_irq(M32R_IRQ_SIO0_S);
 182
 183         /* SIO1_R : uart receive data */
 184         irq_desc[M32R_IRQ_SIO1_R].status = IRQ_DISABLED;
 185         irq_desc[M32R_IRQ_SIO1_R].chip = &mappi_irq_type;
 186         irq_desc[M32R_IRQ_SIO1_R].action = 0;
 187         irq_desc[M32R_IRQ_SIO1_R].depth = 1;
 188         icu_data[M32R_IRQ_SIO1_R].icucr = 0;
 189         disable_mappi_irq(M32R_IRQ_SIO1_R);
 190
 191         /* SIO1_S : uart send data */
 192         irq_desc[M32R_IRQ_SIO1_S].status = IRQ_DISABLED;
 193         irq_desc[M32R_IRQ_SIO1_S].chip = &mappi_irq_type;
 194         irq_desc[M32R_IRQ_SIO1_S].action = 0;
 195         irq_desc[M32R_IRQ_SIO1_S].depth = 1;
 196         icu_data[M32R_IRQ_SIO1_S].icucr = 0;
 197         disable_mappi_irq(M32R_IRQ_SIO1_S);
 198 #endif  /* CONFIG_SERIAL_M32R_SIO */
 199
 200         /* INT#67-#71: CFC#0 IREQ on PLD */
 201         for (i = 0 ; i < CONFIG_CFC_NUM ; i++ ) {
 202                 irq_desc[PLD_IRQ_CF0 + i].status = IRQ_DISABLED;
 203                 irq_desc[PLD_IRQ_CF0 + i].chip = &m32700ut_pld_irq_type;
 204                 irq_desc[PLD_IRQ_CF0 + i].action = 0;
 205                 irq_desc[PLD_IRQ_CF0 + i].depth = 1;    /* disable nested irq */
 206                 pld_icu_data[irq2pldirq(PLD_IRQ_CF0 + i)].icucr
 207                         = PLD_ICUCR_ISMOD01;    /* 'L' level sense */
 208                 disable_m32700ut_pld_irq(PLD_IRQ_CF0 + i);
 209         }
 210
 211 #if defined(CONFIG_SERIAL_8250) || defined(CONFIG_SERIAL_8250_MODULE)
 212         /* INT#76: 16552D#0 IREQ on PLD */
 213         irq_desc[PLD_IRQ_UART0].status = IRQ_DISABLED;
 214         irq_desc[PLD_IRQ_UART0].chip = &m32700ut_pld_irq_type;
 215         irq_desc[PLD_IRQ_UART0].action = 0;
 216         irq_desc[PLD_IRQ_UART0].depth = 1;      /* disable nested irq */
 217         pld_icu_data[irq2pldirq(PLD_IRQ_UART0)].icucr
 218                 = PLD_ICUCR_ISMOD03;    /* 'H' level sense */
 219         disable_m32700ut_pld_irq(PLD_IRQ_UART0);
 220
 221         /* INT#77: 16552D#1 IREQ on PLD */
 222         irq_desc[PLD_IRQ_UART1].status = IRQ_DISABLED;
 223         irq_desc[PLD_IRQ_UART1].chip = &m32700ut_pld_irq_type;
 224         irq_desc[PLD_IRQ_UART1].action = 0;
 225         irq_desc[PLD_IRQ_UART1].depth = 1;      /* disable nested irq */
 226         pld_icu_data[irq2pldirq(PLD_IRQ_UART1)].icucr
 227                 = PLD_ICUCR_ISMOD03;    /* 'H' level sense */
 228         disable_m32700ut_pld_irq(PLD_IRQ_UART1);
 229 #endif  /* CONFIG_SERIAL_8250 || CONFIG_SERIAL_8250_MODULE */
 230
 231 #if defined(CONFIG_IDC_AK4524) || defined(CONFIG_IDC_AK4524_MODULE)
 232         /* INT#80: AK4524 IREQ on PLD */
 233         irq_desc[PLD_IRQ_SNDINT].status = IRQ_DISABLED;
 234         irq_desc[PLD_IRQ_SNDINT].chip = &m32700ut_pld_irq_type;
 235         irq_desc[PLD_IRQ_SNDINT].action = 0;
 236         irq_desc[PLD_IRQ_SNDINT].depth = 1;     /* disable nested irq */
 237         pld_icu_data[irq2pldirq(PLD_IRQ_SNDINT)].icucr
 238                 = PLD_ICUCR_ISMOD01;    /* 'L' level sense */
 239         disable_m32700ut_pld_irq(PLD_IRQ_SNDINT);
 240 #endif  /* CONFIG_IDC_AK4524 || CONFIG_IDC_AK4524_MODULE */
 241
 242         /*
 243          * INT1# is used for UART, MMC, CF Controller in FPGA.
 244          * We enable it here.
 245          */
 246         icu_data[M32R_IRQ_INT1].icucr = M32R_ICUCR_ISMOD11;
 247         enable_mappi_irq(M32R_IRQ_INT1);
 248 }
 249