hw/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, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19 #include "hw.h"
  20 #include "pxa.h"
  21 #include "sharpsl.h"
  22
  23 #undef REG_FMT
  24 #if TARGET_PHYS_ADDR_BITS == 32
  25 #define REG_FMT                 "0x%02x"
  26 #else
  27 #define REG_FMT                 "0x%02lx"
  28 #endif
  29
  30 /* SCOOP devices */
  31
  32 struct scoop_info_s {
  33     qemu_irq handler[16];
  34     qemu_irq *in;
  35     uint16_t status;
  36     uint16_t power;
  37     uint32_t gpio_level;
  38     uint32_t gpio_dir;
  39     uint32_t prev_level;
  40
  41     uint16_t mcr;
  42     uint16_t cdr;
  43     uint16_t ccr;
  44     uint16_t irr;
  45     uint16_t imr;
  46     uint16_t isr;
  47 };
  48
  49 #define SCOOP_MCR       0x00
  50 #define SCOOP_CDR       0x04
  51 #define SCOOP_CSR       0x08
  52 #define SCOOP_CPR       0x0c
  53 #define SCOOP_CCR       0x10
  54 #define SCOOP_IRR_IRM   0x14
  55 #define SCOOP_IMR       0x18
  56 #define SCOOP_ISR       0x1c
  57 #define SCOOP_GPCR      0x20
  58 #define SCOOP_GPWR      0x24
  59 #define SCOOP_GPRR      0x28
  60
  61 static inline void scoop_gpio_handler_update(struct scoop_info_s *s) {
  62     uint32_t level, diff;
  63     int bit;
  64     level = s->gpio_level & s->gpio_dir;
  65
  66     for (diff = s->prev_level ^ level; diff; diff ^= 1 << bit) {
  67         bit = ffs(diff) - 1;
  68         qemu_set_irq(s->handler[bit], (level >> bit) & 1);
  69     }
  70
  71     s->prev_level = level;
  72 }
  73
  74 static uint32_t scoop_readb(void *opaque, target_phys_addr_t addr)
  75 {
  76     struct scoop_info_s *s = (struct scoop_info_s *) opaque;
  77
  78     switch (addr) {
  79     case SCOOP_MCR:
  80         return s->mcr;
  81     case SCOOP_CDR:
  82         return s->cdr;
  83     case SCOOP_CSR:
  84         return s->status;
  85     case SCOOP_CPR:
  86         return s->power;
  87     case SCOOP_CCR:
  88         return s->ccr;
  89     case SCOOP_IRR_IRM:
  90         return s->irr;
  91     case SCOOP_IMR:
  92         return s->imr;
  93     case SCOOP_ISR:
  94         return s->isr;
  95     case SCOOP_GPCR:
  96         return s->gpio_dir;
  97     case SCOOP_GPWR:
  98     case SCOOP_GPRR:
  99         return s->gpio_level;
 100     default:
 101         zaurus_printf("Bad register offset " REG_FMT "\n", addr);
 102     }
 103
 104     return 0;
 105 }
 106
 107 static void scoop_writeb(void *opaque, target_phys_addr_t addr, uint32_t value)
 108 {
 109     struct scoop_info_s *s = (struct scoop_info_s *) opaque;
 110     value &= 0xffff;
 111
 112     switch (addr) {
 113     case SCOOP_MCR:
 114         s->mcr = value;
 115         break;
 116     case SCOOP_CDR:
 117         s->cdr = value;
 118         break;
 119     case SCOOP_CPR:
 120         s->power = value;
 121         if (value & 0x80)
 122             s->power |= 0x8040;
 123         break;
 124     case SCOOP_CCR:
 125         s->ccr = value;
 126         break;
 127     case SCOOP_IRR_IRM:
 128         s->irr = value;
 129         break;
 130     case SCOOP_IMR:
 131         s->imr = value;
 132         break;
 133     case SCOOP_ISR:
 134         s->isr = value;
 135         break;
 136     case SCOOP_GPCR:
 137         s->gpio_dir = value;
 138         scoop_gpio_handler_update(s);
 139         break;
 140     case SCOOP_GPWR:
 141     case SCOOP_GPRR:    /* GPRR is probably R/O in real HW */
 142         s->gpio_level = value & s->gpio_dir;
 143         scoop_gpio_handler_update(s);
 144         break;
 145     default:
 146         zaurus_printf("Bad register offset " REG_FMT "\n", addr);
 147     }
 148 }
 149
 150 static CPUReadMemoryFunc *scoop_readfn[] = {
 151     scoop_readb,
 152     scoop_readb,
 153     scoop_readb,
 154 };
 155 static CPUWriteMemoryFunc *scoop_writefn[] = {
 156     scoop_writeb,
 157     scoop_writeb,
 158     scoop_writeb,
 159 };
 160
 161 void scoop_gpio_set(void *opaque, int line, int level)
 162 {
 163     struct scoop_info_s *s = (struct scoop_info_s *) s;
 164
 165     if (level)
 166         s->gpio_level |= (1 << line);
 167     else
 168         s->gpio_level &= ~(1 << line);
 169 }
 170
 171 qemu_irq *scoop_gpio_in_get(struct scoop_info_s *s)
 172 {
 173     return s->in;
 174 }
 175
 176 void scoop_gpio_out_set(struct scoop_info_s *s, int line,
 177                 qemu_irq handler) {
 178     if (line >= 16) {
 179         fprintf(stderr, "No GPIO pin %i\n", line);
 180         exit(-1);
 181     }
 182
 183     s->handler[line] = handler;
 184 }
 185
 186 static void scoop_save(QEMUFile *f, void *opaque)
 187 {
 188     struct scoop_info_s *s = (struct scoop_info_s *) opaque;
 189     qemu_put_be16s(f, &s->status);
 190     qemu_put_be16s(f, &s->power);
 191     qemu_put_be32s(f, &s->gpio_level);
 192     qemu_put_be32s(f, &s->gpio_dir);
 193     qemu_put_be32s(f, &s->prev_level);
 194     qemu_put_be16s(f, &s->mcr);
 195     qemu_put_be16s(f, &s->cdr);
 196     qemu_put_be16s(f, &s->ccr);
 197     qemu_put_be16s(f, &s->irr);
 198     qemu_put_be16s(f, &s->imr);
 199     qemu_put_be16s(f, &s->isr);
 200 }
 201
 202 static int scoop_load(QEMUFile *f, void *opaque, int version_id)
 203 {
 204     uint16_t dummy;
 205     struct scoop_info_s *s = (struct scoop_info_s *) opaque;
 206     qemu_get_be16s(f, &s->status);
 207     qemu_get_be16s(f, &s->power);
 208     qemu_get_be32s(f, &s->gpio_level);
 209     qemu_get_be32s(f, &s->gpio_dir);
 210     qemu_get_be32s(f, &s->prev_level);
 211     qemu_get_be16s(f, &s->mcr);
 212     qemu_get_be16s(f, &s->cdr);
 213     qemu_get_be16s(f, &s->ccr);
 214     qemu_get_be16s(f, &s->irr);
 215     qemu_get_be16s(f, &s->imr);
 216     qemu_get_be16s(f, &s->isr);
 217     if (version_id < 1)
 218             qemu_get_be16s(f, &dummy);
 219
 220     return 0;
 221 }
 222
 223 struct scoop_info_s *scoop_init(struct pxa2xx_state_s *cpu,
 224                 int instance,
 225                 target_phys_addr_t target_base) {
 226     int iomemtype;
 227     struct scoop_info_s *s;
 228
 229     s = (struct scoop_info_s *)
 230             qemu_mallocz(sizeof(struct scoop_info_s));
 231     memset(s, 0, sizeof(struct scoop_info_s));
 232
 233     s->status = 0x02;
 234     s->in = qemu_allocate_irqs(scoop_gpio_set, s, 16);
 235     iomemtype = cpu_register_io_memory(0, scoop_readfn,
 236                     scoop_writefn, s);
 237     cpu_register_physical_memory(target_base, 0x1000, iomemtype);
 238     register_savevm("scoop", instance, 1, scoop_save, scoop_load, s);
 239
 240     return s;
 241 }
 242
 243 /* Write the bootloader parameters memory area.  */
 244
 245 #define MAGIC_CHG(a, b, c, d)   ((d << 24) | (c << 16) | (b << 8) | a)
 246
 247 static struct __attribute__ ((__packed__)) sl_param_info {
 248     uint32_t comadj_keyword;
 249     int32_t comadj;
 250
 251     uint32_t uuid_keyword;
 252     char uuid[16];
 253
 254     uint32_t touch_keyword;
 255     int32_t touch_xp;
 256     int32_t touch_yp;
 257     int32_t touch_xd;
 258     int32_t touch_yd;
 259
 260     uint32_t adadj_keyword;
 261     int32_t adadj;
 262
 263     uint32_t phad_keyword;
 264     int32_t phadadj;
 265 } zaurus_bootparam = {
 266     .comadj_keyword     = MAGIC_CHG('C', 'M', 'A', 'D'),
 267     .comadj             = 125,
 268     .uuid_keyword       = MAGIC_CHG('U', 'U', 'I', 'D'),
 269     .uuid               = { -1 },
 270     .touch_keyword      = MAGIC_CHG('T', 'U', 'C', 'H'),
 271     .touch_xp           = -1,
 272     .adadj_keyword      = MAGIC_CHG('B', 'V', 'A', 'D'),
 273     .adadj              = -1,
 274     .phad_keyword       = MAGIC_CHG('P', 'H', 'A', 'D'),
 275     .phadadj            = 0x01,
 276 };
 277
 278 void sl_bootparam_write(uint32_t ptr)
 279 {
 280     memcpy(phys_ram_base + ptr, &zaurus_bootparam,
 281                     sizeof(struct sl_param_info));
 282 }