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