hw/pcmcia/pxa2xx.c

   1 /*
   2  * Intel XScale PXA255/270 PC Card and CompactFlash Interface.
   3  *
   4  * Copyright (c) 2006 Openedhand Ltd.
   5  * Written by Andrzej Zaborowski <balrog@zabor.org>
   6  *
   7  * This code is licensed under the GPLv2.
   8  *
   9  * Contributions after 2012-01-13 are licensed under the terms of the
  10  * GNU GPL, version 2 or (at your option) any later version.
  11  */
  12
  13 #include "hw/hw.h"
  14 #include "hw/sysbus.h"
  15 #include "hw/pcmcia.h"
  16 #include "hw/arm/pxa.h"
  17
  18 #define TYPE_PXA2XX_PCMCIA "pxa2xx-pcmcia"
  19 #define PXA2XX_PCMCIA(obj) \
  20     OBJECT_CHECK(PXA2xxPCMCIAState, obj, TYPE_PXA2XX_PCMCIA)
  21
  22 struct PXA2xxPCMCIAState {
  23     SysBusDevice parent_obj;
  24
  25     PCMCIASocket slot;
  26     MemoryRegion container_mem;
  27     MemoryRegion common_iomem;
  28     MemoryRegion attr_iomem;
  29     MemoryRegion iomem;
  30
  31     qemu_irq irq;
  32     qemu_irq cd_irq;
  33
  34     PCMCIACardState *card;
  35 };
  36
  37 static uint64_t pxa2xx_pcmcia_common_read(void *opaque,
  38                 hwaddr offset, unsigned size)
  39 {
  40     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
  41     PCMCIACardClass *pcc;
  42
  43     if (s->slot.attached) {
  44         pcc = PCMCIA_CARD_GET_CLASS(s->card);
  45         return pcc->common_read(s->card, offset);
  46     }
  47
  48     return 0;
  49 }
  50
  51 static void pxa2xx_pcmcia_common_write(void *opaque, hwaddr offset,
  52                                        uint64_t value, unsigned size)
  53 {
  54     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
  55     PCMCIACardClass *pcc;
  56
  57     if (s->slot.attached) {
  58         pcc = PCMCIA_CARD_GET_CLASS(s->card);
  59         pcc->common_write(s->card, offset, value);
  60     }
  61 }
  62
  63 static uint64_t pxa2xx_pcmcia_attr_read(void *opaque,
  64                 hwaddr offset, unsigned size)
  65 {
  66     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
  67     PCMCIACardClass *pcc;
  68
  69     if (s->slot.attached) {
  70         pcc = PCMCIA_CARD_GET_CLASS(s->card);
  71         return pcc->attr_read(s->card, offset);
  72     }
  73
  74     return 0;
  75 }
  76
  77 static void pxa2xx_pcmcia_attr_write(void *opaque, hwaddr offset,
  78                                      uint64_t value, unsigned size)
  79 {
  80     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
  81     PCMCIACardClass *pcc;
  82
  83     if (s->slot.attached) {
  84         pcc = PCMCIA_CARD_GET_CLASS(s->card);
  85         pcc->attr_write(s->card, offset, value);
  86     }
  87 }
  88
  89 static uint64_t pxa2xx_pcmcia_io_read(void *opaque,
  90                 hwaddr offset, unsigned size)
  91 {
  92     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
  93     PCMCIACardClass *pcc;
  94
  95     if (s->slot.attached) {
  96         pcc = PCMCIA_CARD_GET_CLASS(s->card);
  97         return pcc->io_read(s->card, offset);
  98     }
  99
 100     return 0;
 101 }
 102
 103 static void pxa2xx_pcmcia_io_write(void *opaque, hwaddr offset,
 104                                    uint64_t value, unsigned size)
 105 {
 106     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 107     PCMCIACardClass *pcc;
 108
 109     if (s->slot.attached) {
 110         pcc = PCMCIA_CARD_GET_CLASS(s->card);
 111         pcc->io_write(s->card, offset, value);
 112     }
 113 }
 114
 115 static const MemoryRegionOps pxa2xx_pcmcia_common_ops = {
 116     .read = pxa2xx_pcmcia_common_read,
 117     .write = pxa2xx_pcmcia_common_write,
 118     .endianness = DEVICE_NATIVE_ENDIAN
 119 };
 120
 121 static const MemoryRegionOps pxa2xx_pcmcia_attr_ops = {
 122     .read = pxa2xx_pcmcia_attr_read,
 123     .write = pxa2xx_pcmcia_attr_write,
 124     .endianness = DEVICE_NATIVE_ENDIAN
 125 };
 126
 127 static const MemoryRegionOps pxa2xx_pcmcia_io_ops = {
 128     .read = pxa2xx_pcmcia_io_read,
 129     .write = pxa2xx_pcmcia_io_write,
 130     .endianness = DEVICE_NATIVE_ENDIAN
 131 };
 132
 133 static void pxa2xx_pcmcia_set_irq(void *opaque, int line, int level)
 134 {
 135     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 136     if (!s->irq)
 137         return;
 138
 139     qemu_set_irq(s->irq, level);
 140 }
 141
 142 PXA2xxPCMCIAState *pxa2xx_pcmcia_init(MemoryRegion *sysmem,
 143                                       hwaddr base)
 144 {
 145     DeviceState *dev;
 146     PXA2xxPCMCIAState *s;
 147
 148     dev = qdev_create(NULL, TYPE_PXA2XX_PCMCIA);
 149     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, base);
 150     s = PXA2XX_PCMCIA(dev);
 151
 152     qdev_init_nofail(dev);
 153
 154     return s;
 155 }
 156
 157 static void pxa2xx_pcmcia_initfn(Object *obj)
 158 {
 159     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 160     PXA2xxPCMCIAState *s = PXA2XX_PCMCIA(obj);
 161
 162     memory_region_init(&s->container_mem, obj, "container", 0x10000000);
 163     sysbus_init_mmio(sbd, &s->container_mem);
 164
 165     /* Socket I/O Memory Space */
 166     memory_region_init_io(&s->iomem, NULL, &pxa2xx_pcmcia_io_ops, s,
 167                           "pxa2xx-pcmcia-io", 0x04000000);
 168     memory_region_add_subregion(&s->container_mem, 0x00000000,
 169                                 &s->iomem);
 170
 171     /* Then next 64 MB is reserved */
 172
 173     /* Socket Attribute Memory Space */
 174     memory_region_init_io(&s->attr_iomem, NULL, &pxa2xx_pcmcia_attr_ops, s,
 175                           "pxa2xx-pcmcia-attribute", 0x04000000);
 176     memory_region_add_subregion(&s->container_mem, 0x08000000,
 177                                 &s->attr_iomem);
 178
 179     /* Socket Common Memory Space */
 180     memory_region_init_io(&s->common_iomem, NULL, &pxa2xx_pcmcia_common_ops, s,
 181                           "pxa2xx-pcmcia-common", 0x04000000);
 182     memory_region_add_subregion(&s->container_mem, 0x0c000000,
 183                                 &s->common_iomem);
 184
 185     s->slot.irq = qemu_allocate_irq(pxa2xx_pcmcia_set_irq, s, 0);
 186
 187     object_property_add_link(obj, "card", TYPE_PCMCIA_CARD,
 188                              (Object **)&s->card,
 189                              NULL, /* read-only property */
 190                              0, NULL);
 191 }
 192
 193 /* Insert a new card into a slot */
 194 int pxa2xx_pcmcia_attach(void *opaque, PCMCIACardState *card)
 195 {
 196     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 197     PCMCIACardClass *pcc;
 198
 199     if (s->slot.attached) {
 200         return -EEXIST;
 201     }
 202
 203     if (s->cd_irq) {
 204         qemu_irq_raise(s->cd_irq);
 205     }
 206
 207     s->card = card;
 208     pcc = PCMCIA_CARD_GET_CLASS(s->card);
 209
 210     s->slot.attached = true;
 211     s->card->slot = &s->slot;
 212     pcc->attach(s->card);
 213
 214     return 0;
 215 }
 216
 217 /* Eject card from the slot */
 218 int pxa2xx_pcmcia_detach(void *opaque)
 219 {
 220     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 221     PCMCIACardClass *pcc;
 222
 223     if (!s->slot.attached) {
 224         return -ENOENT;
 225     }
 226
 227     pcc = PCMCIA_CARD_GET_CLASS(s->card);
 228     pcc->detach(s->card);
 229     s->card->slot = NULL;
 230     s->card = NULL;
 231
 232     s->slot.attached = false;
 233
 234     if (s->irq) {
 235         qemu_irq_lower(s->irq);
 236     }
 237     if (s->cd_irq) {
 238         qemu_irq_lower(s->cd_irq);
 239     }
 240
 241     return 0;
 242 }
 243
 244 /* Who to notify on card events */
 245 void pxa2xx_pcmcia_set_irq_cb(void *opaque, qemu_irq irq, qemu_irq cd_irq)
 246 {
 247     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 248     s->irq = irq;
 249     s->cd_irq = cd_irq;
 250 }
 251
 252 static const TypeInfo pxa2xx_pcmcia_type_info = {
 253     .name = TYPE_PXA2XX_PCMCIA,
 254     .parent = TYPE_SYS_BUS_DEVICE,
 255     .instance_size = sizeof(PXA2xxPCMCIAState),
 256     .instance_init = pxa2xx_pcmcia_initfn,
 257 };
 258
 259 static void pxa2xx_pcmcia_register_types(void)
 260 {
 261     type_register_static(&pxa2xx_pcmcia_type_info);
 262 }
 263
 264 type_init(pxa2xx_pcmcia_register_types)