hw/mst_fpga.c

   1 /*
   2  * PXA270-based Intel Mainstone platforms.
   3  * FPGA driver
   4  *
   5  * Copyright (c) 2007 by Armin Kuster <akuster@kama-aina.net> or
   6  *                                    <akuster@mvista.com>
   7  *
   8  * This code is licensed under the GNU GPL v2.
   9  *
  10  * Contributions after 2012-01-13 are licensed under the terms of the
  11  * GNU GPL, version 2 or (at your option) any later version.
  12  */
  13 #include "hw.h"
  14 #include "sysbus.h"
  15
  16 /* Mainstone FPGA for extern irqs */
  17 #define FPGA_GPIO_PIN   0
  18 #define MST_NUM_IRQS    16
  19 #define MST_LEDDAT1             0x10
  20 #define MST_LEDDAT2             0x14
  21 #define MST_LEDCTRL             0x40
  22 #define MST_GPSWR               0x60
  23 #define MST_MSCWR1              0x80
  24 #define MST_MSCWR2              0x84
  25 #define MST_MSCWR3              0x88
  26 #define MST_MSCRD               0x90
  27 #define MST_INTMSKENA   0xc0
  28 #define MST_INTSETCLR   0xd0
  29 #define MST_PCMCIA0             0xe0
  30 #define MST_PCMCIA1             0xe4
  31
  32 #define MST_PCMCIAx_READY       (1 << 10)
  33 #define MST_PCMCIAx_nCD         (1 << 5)
  34
  35 #define MST_PCMCIA_CD0_IRQ      9
  36 #define MST_PCMCIA_CD1_IRQ      13
  37
  38 typedef struct mst_irq_state{
  39         SysBusDevice busdev;
  40         MemoryRegion iomem;
  41
  42         qemu_irq parent;
  43
  44         uint32_t prev_level;
  45         uint32_t leddat1;
  46         uint32_t leddat2;
  47         uint32_t ledctrl;
  48         uint32_t gpswr;
  49         uint32_t mscwr1;
  50         uint32_t mscwr2;
  51         uint32_t mscwr3;
  52         uint32_t mscrd;
  53         uint32_t intmskena;
  54         uint32_t intsetclr;
  55         uint32_t pcmcia0;
  56         uint32_t pcmcia1;
  57 }mst_irq_state;
  58
  59 static void
  60 mst_fpga_set_irq(void *opaque, int irq, int level)
  61 {
  62         mst_irq_state *s = (mst_irq_state *)opaque;
  63         uint32_t oldint = s->intsetclr & s->intmskena;
  64
  65         if (level)
  66                 s->prev_level |= 1u << irq;
  67         else
  68                 s->prev_level &= ~(1u << irq);
  69
  70         switch(irq) {
  71         case MST_PCMCIA_CD0_IRQ:
  72                 if (level)
  73                         s->pcmcia0 &= ~MST_PCMCIAx_nCD;
  74                 else
  75                         s->pcmcia0 |=  MST_PCMCIAx_nCD;
  76                 break;
  77         case MST_PCMCIA_CD1_IRQ:
  78                 if (level)
  79                         s->pcmcia1 &= ~MST_PCMCIAx_nCD;
  80                 else
  81                         s->pcmcia1 |=  MST_PCMCIAx_nCD;
  82                 break;
  83         }
  84
  85         if ((s->intmskena & (1u << irq)) && level)
  86                 s->intsetclr |= 1u << irq;
  87
  88         if (oldint != (s->intsetclr & s->intmskena))
  89                 qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
  90 }
  91
  92
  93 static uint64_t
  94 mst_fpga_readb(void *opaque, target_phys_addr_t addr, unsigned size)
  95 {
  96         mst_irq_state *s = (mst_irq_state *) opaque;
  97
  98         switch (addr) {
  99         case MST_LEDDAT1:
 100                 return s->leddat1;
 101         case MST_LEDDAT2:
 102                 return s->leddat2;
 103         case MST_LEDCTRL:
 104                 return s->ledctrl;
 105         case MST_GPSWR:
 106                 return s->gpswr;
 107         case MST_MSCWR1:
 108                 return s->mscwr1;
 109         case MST_MSCWR2:
 110                 return s->mscwr2;
 111         case MST_MSCWR3:
 112                 return s->mscwr3;
 113         case MST_MSCRD:
 114                 return s->mscrd;
 115         case MST_INTMSKENA:
 116                 return s->intmskena;
 117         case MST_INTSETCLR:
 118                 return s->intsetclr;
 119         case MST_PCMCIA0:
 120                 return s->pcmcia0;
 121         case MST_PCMCIA1:
 122                 return s->pcmcia1;
 123         default:
 124                 printf("Mainstone - mst_fpga_readb: Bad register offset "
 125                         "0x" TARGET_FMT_plx "\n", addr);
 126         }
 127         return 0;
 128 }
 129
 130 static void
 131 mst_fpga_writeb(void *opaque, target_phys_addr_t addr, uint64_t value,
 132                 unsigned size)
 133 {
 134         mst_irq_state *s = (mst_irq_state *) opaque;
 135         value &= 0xffffffff;
 136
 137         switch (addr) {
 138         case MST_LEDDAT1:
 139                 s->leddat1 = value;
 140                 break;
 141         case MST_LEDDAT2:
 142                 s->leddat2 = value;
 143                 break;
 144         case MST_LEDCTRL:
 145                 s->ledctrl = value;
 146                 break;
 147         case MST_GPSWR:
 148                 s->gpswr = value;
 149                 break;
 150         case MST_MSCWR1:
 151                 s->mscwr1 = value;
 152                 break;
 153         case MST_MSCWR2:
 154                 s->mscwr2 = value;
 155                 break;
 156         case MST_MSCWR3:
 157                 s->mscwr3 = value;
 158                 break;
 159         case MST_MSCRD:
 160                 s->mscrd =  value;
 161                 break;
 162         case MST_INTMSKENA:     /* Mask interrupt */
 163                 s->intmskena = (value & 0xFEEFF);
 164                 qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
 165                 break;
 166         case MST_INTSETCLR:     /* clear or set interrupt */
 167                 s->intsetclr = (value & 0xFEEFF);
 168                 qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
 169                 break;
 170                 /* For PCMCIAx allow the to change only power and reset */
 171         case MST_PCMCIA0:
 172                 s->pcmcia0 = (value & 0x1f) | (s->pcmcia0 & ~0x1f);
 173                 break;
 174         case MST_PCMCIA1:
 175                 s->pcmcia1 = (value & 0x1f) | (s->pcmcia1 & ~0x1f);
 176                 break;
 177         default:
 178                 printf("Mainstone - mst_fpga_writeb: Bad register offset "
 179                         "0x" TARGET_FMT_plx "\n", addr);
 180         }
 181 }
 182
 183 static const MemoryRegionOps mst_fpga_ops = {
 184         .read = mst_fpga_readb,
 185         .write = mst_fpga_writeb,
 186         .endianness = DEVICE_NATIVE_ENDIAN,
 187 };
 188
 189 static int mst_fpga_post_load(void *opaque, int version_id)
 190 {
 191         mst_irq_state *s = (mst_irq_state *) opaque;
 192
 193         qemu_set_irq(s->parent, s->intsetclr & s->intmskena);
 194         return 0;
 195 }
 196
 197 static int mst_fpga_init(SysBusDevice *dev)
 198 {
 199         mst_irq_state *s;
 200
 201         s = FROM_SYSBUS(mst_irq_state, dev);
 202
 203         s->pcmcia0 = MST_PCMCIAx_READY | MST_PCMCIAx_nCD;
 204         s->pcmcia1 = MST_PCMCIAx_READY | MST_PCMCIAx_nCD;
 205
 206         sysbus_init_irq(dev, &s->parent);
 207
 208         /* alloc the external 16 irqs */
 209         qdev_init_gpio_in(&dev->qdev, mst_fpga_set_irq, MST_NUM_IRQS);
 210
 211         memory_region_init_io(&s->iomem, &mst_fpga_ops, s,
 212                             "fpga", 0x00100000);
 213         sysbus_init_mmio(dev, &s->iomem);
 214         return 0;
 215 }
 216
 217 static VMStateDescription vmstate_mst_fpga_regs = {
 218         .name = "mainstone_fpga",
 219         .version_id = 0,
 220         .minimum_version_id = 0,
 221         .minimum_version_id_old = 0,
 222         .post_load = mst_fpga_post_load,
 223         .fields = (VMStateField []) {
 224                 VMSTATE_UINT32(prev_level, mst_irq_state),
 225                 VMSTATE_UINT32(leddat1, mst_irq_state),
 226                 VMSTATE_UINT32(leddat2, mst_irq_state),
 227                 VMSTATE_UINT32(ledctrl, mst_irq_state),
 228                 VMSTATE_UINT32(gpswr, mst_irq_state),
 229                 VMSTATE_UINT32(mscwr1, mst_irq_state),
 230                 VMSTATE_UINT32(mscwr2, mst_irq_state),
 231                 VMSTATE_UINT32(mscwr3, mst_irq_state),
 232                 VMSTATE_UINT32(mscrd, mst_irq_state),
 233                 VMSTATE_UINT32(intmskena, mst_irq_state),
 234                 VMSTATE_UINT32(intsetclr, mst_irq_state),
 235                 VMSTATE_UINT32(pcmcia0, mst_irq_state),
 236                 VMSTATE_UINT32(pcmcia1, mst_irq_state),
 237                 VMSTATE_END_OF_LIST(),
 238         },
 239 };
 240
 241 static SysBusDeviceInfo mst_fpga_info = {
 242         .init = mst_fpga_init,
 243         .qdev.name = "mainstone-fpga",
 244         .qdev.desc = "Mainstone II FPGA",
 245         .qdev.size = sizeof(mst_irq_state),
 246         .qdev.vmsd = &vmstate_mst_fpga_regs,
 247 };
 248
 249 static void mst_fpga_register(void)
 250 {
 251         sysbus_register_withprop(&mst_fpga_info);
 252 }
 253 device_init(mst_fpga_register);