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 static void pxa2xx_pcmcia_initfn(Object *obj)
 142 {
 143     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 144     PXA2xxPCMCIAState *s = PXA2XX_PCMCIA(obj);
 145
 146     memory_region_init(&s->container_mem, obj, "container", 0x10000000);
 147     sysbus_init_mmio(sbd, &s->container_mem);
 148
 149     /* Socket I/O Memory Space */
 150     memory_region_init_io(&s->iomem, obj, &pxa2xx_pcmcia_io_ops, s,
 151                           "pxa2xx-pcmcia-io", 0x04000000);
 152     memory_region_add_subregion(&s->container_mem, 0x00000000,
 153                                 &s->iomem);
 154
 155     /* Then next 64 MB is reserved */
 156
 157     /* Socket Attribute Memory Space */
 158     memory_region_init_io(&s->attr_iomem, obj, &pxa2xx_pcmcia_attr_ops, s,
 159                           "pxa2xx-pcmcia-attribute", 0x04000000);
 160     memory_region_add_subregion(&s->container_mem, 0x08000000,
 161                                 &s->attr_iomem);
 162
 163     /* Socket Common Memory Space */
 164     memory_region_init_io(&s->common_iomem, obj, &pxa2xx_pcmcia_common_ops, s,
 165                           "pxa2xx-pcmcia-common", 0x04000000);
 166     memory_region_add_subregion(&s->container_mem, 0x0c000000,
 167                                 &s->common_iomem);
 168
 169     s->slot.irq = qemu_allocate_irq(pxa2xx_pcmcia_set_irq, s, 0);
 170
 171     object_property_add_link(obj, "card", TYPE_PCMCIA_CARD,
 172                              (Object **)&s->card,
 173                              NULL, /* read-only property */
 174                              0);
 175 }
 176
 177 /* Insert a new card into a slot */
 178 int pxa2xx_pcmcia_attach(void *opaque, PCMCIACardState *card)
 179 {
 180     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 181     PCMCIACardClass *pcc;
 182
 183     if (s->slot.attached) {
 184         return -EEXIST;
 185     }
 186
 187     if (s->cd_irq) {
 188         qemu_irq_raise(s->cd_irq);
 189     }
 190
 191     s->card = card;
 192     pcc = PCMCIA_CARD_GET_CLASS(s->card);
 193
 194     s->slot.attached = true;
 195     s->card->slot = &s->slot;
 196     pcc->attach(s->card);
 197
 198     return 0;
 199 }
 200
 201 /* Eject card from the slot */
 202 int pxa2xx_pcmcia_detach(void *opaque)
 203 {
 204     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 205     PCMCIACardClass *pcc;
 206
 207     if (!s->slot.attached) {
 208         return -ENOENT;
 209     }
 210
 211     pcc = PCMCIA_CARD_GET_CLASS(s->card);
 212     pcc->detach(s->card);
 213     s->card->slot = NULL;
 214     s->card = NULL;
 215
 216     s->slot.attached = false;
 217
 218     if (s->irq) {
 219         qemu_irq_lower(s->irq);
 220     }
 221     if (s->cd_irq) {
 222         qemu_irq_lower(s->cd_irq);
 223     }
 224
 225     return 0;
 226 }
 227
 228 /* Who to notify on card events */
 229 void pxa2xx_pcmcia_set_irq_cb(void *opaque, qemu_irq irq, qemu_irq cd_irq)
 230 {
 231     PXA2xxPCMCIAState *s = (PXA2xxPCMCIAState *) opaque;
 232     s->irq = irq;
 233     s->cd_irq = cd_irq;
 234 }
 235
 236 static const TypeInfo pxa2xx_pcmcia_type_info = {
 237     .name = TYPE_PXA2XX_PCMCIA,
 238     .parent = TYPE_SYS_BUS_DEVICE,
 239     .instance_size = sizeof(PXA2xxPCMCIAState),
 240     .instance_init = pxa2xx_pcmcia_initfn,
 241 };
 242
 243 static void pxa2xx_pcmcia_register_types(void)
 244 {
 245     type_register_static(&pxa2xx_pcmcia_type_info);
 246 }
 247
 248 type_init(pxa2xx_pcmcia_register_types)