hw/gpio/zaurus.c

   1 /*
   2  * Copyright (c) 2006-2008 Openedhand Ltd.
   3  * Written by Andrzej Zaborowski <balrog@zabor.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 or
   8  * (at your option) version 3 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "hw/irq.h"
  21 #include "hw/arm/sharpsl.h"
  22 #include "hw/sysbus.h"
  23 #include "migration/vmstate.h"
  24 #include "qemu/module.h"
  25
  26 #undef REG_FMT
  27 #define REG_FMT                 "0x%02lx"
  28
  29 /* SCOOP devices */
  30
  31 #define TYPE_SCOOP "scoop"
  32 #define SCOOP(obj) OBJECT_CHECK(ScoopInfo, (obj), TYPE_SCOOP)
  33
  34 typedef struct ScoopInfo ScoopInfo;
  35 struct ScoopInfo {
  36     SysBusDevice parent_obj;
  37
  38     qemu_irq handler[16];
  39     MemoryRegion iomem;
  40     uint16_t status;
  41     uint16_t power;
  42     uint32_t gpio_level;
  43     uint32_t gpio_dir;
  44     uint32_t prev_level;
  45
  46     uint16_t mcr;
  47     uint16_t cdr;
  48     uint16_t ccr;
  49     uint16_t irr;
  50     uint16_t imr;
  51     uint16_t isr;
  52 };
  53
  54 #define SCOOP_MCR       0x00
  55 #define SCOOP_CDR       0x04
  56 #define SCOOP_CSR       0x08
  57 #define SCOOP_CPR       0x0c
  58 #define SCOOP_CCR       0x10
  59 #define SCOOP_IRR_IRM   0x14
  60 #define SCOOP_IMR       0x18
  61 #define SCOOP_ISR       0x1c
  62 #define SCOOP_GPCR      0x20
  63 #define SCOOP_GPWR      0x24
  64 #define SCOOP_GPRR      0x28
  65
  66 static inline void scoop_gpio_handler_update(ScoopInfo *s) {
  67     uint32_t level, diff;
  68     int bit;
  69     level = s->gpio_level & s->gpio_dir;
  70
  71     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
  72         bit = ctz32(diff);
  73         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
  74     }
  75
  76     s->prev_level = level;
  77 }
  78
  79 static uint64_t scoop_read(void *opaque, hwaddr addr,
  80                            unsigned size)
  81 {
  82     ScoopInfo *s = (ScoopInfo *) opaque;
  83
  84     switch (addr & 0x3f) {
  85     case SCOOP_MCR:
  86         return s->mcr;
  87     case SCOOP_CDR:
  88         return s->cdr;
  89     case SCOOP_CSR:
  90         return s->status;
  91     case SCOOP_CPR:
  92         return s->power;
  93     case SCOOP_CCR:
  94         return s->ccr;
  95     case SCOOP_IRR_IRM:
  96         return s->irr;
  97     case SCOOP_IMR:
  98         return s->imr;
  99     case SCOOP_ISR:
 100         return s->isr;
 101     case SCOOP_GPCR:
 102         return s->gpio_dir;
 103     case SCOOP_GPWR:
 104     case SCOOP_GPRR:
 105         return s->gpio_level;
 106     default:
 107         zaurus_printf("Bad register offset " REG_FMT "\n", (unsigned long)addr);
 108     }
 109
 110     return 0;
 111 }
 112
 113 static void scoop_write(void *opaque, hwaddr addr,
 114                         uint64_t value, unsigned size)
 115 {
 116     ScoopInfo *s = (ScoopInfo *) opaque;
 117     value &= 0xffff;
 118
 119     switch (addr & 0x3f) {
 120     case SCOOP_MCR:
 121         s->mcr = value;
 122         break;
 123     case SCOOP_CDR:
 124         s->cdr = value;
 125         break;
 126     case SCOOP_CPR:
 127         s->power = value;
 128         if (value & 0x80)
 129             s->power |= 0x8040;
 130         break;
 131     case SCOOP_CCR:
 132         s->ccr = value;
 133         break;
 134     case SCOOP_IRR_IRM:
 135         s->irr = value;
 136         break;
 137     case SCOOP_IMR:
 138         s->imr = value;
 139         break;
 140     case SCOOP_ISR:
 141         s->isr = value;
 142         break;
 143     case SCOOP_GPCR:
 144         s->gpio_dir = value;
 145         scoop_gpio_handler_update(s);
 146         break;
 147     case SCOOP_GPWR:
 148     case SCOOP_GPRR:    /* GPRR is probably R/O in real HW */
 149         s->gpio_level = value & s->gpio_dir;
 150         scoop_gpio_handler_update(s);
 151         break;
 152     default:
 153         zaurus_printf("Bad register offset " REG_FMT "\n", (unsigned long)addr);
 154     }
 155 }
 156
 157 static const MemoryRegionOps scoop_ops = {
 158     .read = scoop_read,
 159     .write = scoop_write,
 160     .endianness = DEVICE_NATIVE_ENDIAN,
 161 };
 162
 163 static void scoop_gpio_set(void *opaque, int line, int level)
 164 {
 165     ScoopInfo *s = (ScoopInfo *) opaque;
 166
 167     if (level)
 168         s->gpio_level |= (1 << line);
 169     else
 170         s->gpio_level &= ~(1 << line);
 171 }
 172
 173 static void scoop_init(Object *obj)
 174 {
 175     DeviceState *dev = DEVICE(obj);
 176     ScoopInfo *s = SCOOP(obj);
 177     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 178
 179     s->status = 0x02;
 180     qdev_init_gpio_out(dev, s->handler, 16);
 181     qdev_init_gpio_in(dev, scoop_gpio_set, 16);
 182     memory_region_init_io(&s->iomem, obj, &scoop_ops, s, "scoop", 0x1000);
 183
 184     sysbus_init_mmio(sbd, &s->iomem);
 185 }
 186
 187 static int scoop_post_load(void *opaque, int version_id)
 188 {
 189     ScoopInfo *s = (ScoopInfo *) opaque;
 190     int i;
 191     uint32_t level;
 192
 193     level = s->gpio_level & s->gpio_dir;
 194
 195     for (i = 0; i < 16; i++) {
 196         qemu_set_irq(s->handler[i], (level >> i) & 1);
 197     }
 198
 199     s->prev_level = level;
 200
 201     return 0;
 202 }
 203
 204 static bool is_version_0 (void *opaque, int version_id)
 205 {
 206     return version_id == 0;
 207 }
 208
 209 static bool vmstate_scoop_validate(void *opaque, int version_id)
 210 {
 211     ScoopInfo *s = opaque;
 212
 213     return !(s->prev_level & 0xffff0000) &&
 214         !(s->gpio_level & 0xffff0000) &&
 215         !(s->gpio_dir & 0xffff0000);
 216 }
 217
 218 static const VMStateDescription vmstate_scoop_regs = {
 219     .name = "scoop",
 220     .version_id = 1,
 221     .minimum_version_id = 0,
 222     .post_load = scoop_post_load,
 223     .fields = (VMStateField[]) {
 224         VMSTATE_UINT16(status, ScoopInfo),
 225         VMSTATE_UINT16(power, ScoopInfo),
 226         VMSTATE_UINT32(gpio_level, ScoopInfo),
 227         VMSTATE_UINT32(gpio_dir, ScoopInfo),
 228         VMSTATE_UINT32(prev_level, ScoopInfo),
 229         VMSTATE_VALIDATE("irq levels are 16 bit", vmstate_scoop_validate),
 230         VMSTATE_UINT16(mcr, ScoopInfo),
 231         VMSTATE_UINT16(cdr, ScoopInfo),
 232         VMSTATE_UINT16(ccr, ScoopInfo),
 233         VMSTATE_UINT16(irr, ScoopInfo),
 234         VMSTATE_UINT16(imr, ScoopInfo),
 235         VMSTATE_UINT16(isr, ScoopInfo),
 236         VMSTATE_UNUSED_TEST(is_version_0, 2),
 237         VMSTATE_END_OF_LIST(),
 238     },
 239 };
 240
 241 static void scoop_sysbus_class_init(ObjectClass *klass, void *data)
 242 {
 243     DeviceClass *dc = DEVICE_CLASS(klass);
 244
 245     dc->desc = "Scoop2 Sharp custom ASIC";
 246     dc->vmsd = &vmstate_scoop_regs;
 247 }
 248
 249 static const TypeInfo scoop_sysbus_info = {
 250     .name          = TYPE_SCOOP,
 251     .parent        = TYPE_SYS_BUS_DEVICE,
 252     .instance_size = sizeof(ScoopInfo),
 253     .instance_init = scoop_init,
 254     .class_init    = scoop_sysbus_class_init,
 255 };
 256
 257 static void scoop_register_types(void)
 258 {
 259     type_register_static(&scoop_sysbus_info);
 260 }
 261
 262 type_init(scoop_register_types)
 263
 264 /* Write the bootloader parameters memory area.  */
 265
 266 #define MAGIC_CHG(a, b, c, d)   ((d << 24) | (c << 16) | (b << 8) | a)
 267
 268 static struct QEMU_PACKED sl_param_info {
 269     uint32_t comadj_keyword;
 270     int32_t comadj;
 271
 272     uint32_t uuid_keyword;
 273     char uuid[16];
 274
 275     uint32_t touch_keyword;
 276     int32_t touch_xp;
 277     int32_t touch_yp;
 278     int32_t touch_xd;
 279     int32_t touch_yd;
 280
 281     uint32_t adadj_keyword;
 282     int32_t adadj;
 283
 284     uint32_t phad_keyword;
 285     int32_t phadadj;
 286 } zaurus_bootparam = {
 287     .comadj_keyword     = MAGIC_CHG('C', 'M', 'A', 'D'),
 288     .comadj             = 125,
 289     .uuid_keyword       = MAGIC_CHG('U', 'U', 'I', 'D'),
 290     .uuid               = { -1 },
 291     .touch_keyword      = MAGIC_CHG('T', 'U', 'C', 'H'),
 292     .touch_xp           = -1,
 293     .adadj_keyword      = MAGIC_CHG('B', 'V', 'A', 'D'),
 294     .adadj              = -1,
 295     .phad_keyword       = MAGIC_CHG('P', 'H', 'A', 'D'),
 296     .phadadj            = 0x01,
 297 };
 298
 299 void sl_bootparam_write(hwaddr ptr)
 300 {
 301     cpu_physical_memory_write(ptr, &zaurus_bootparam,
 302                               sizeof(struct sl_param_info));
 303 }