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/*
* TI OMAP SDRAM controller emulation.
*
* Copyright (C) 2007-2008 Nokia Corporation
* Written by Andrzej Zaborowski <andrew@openedhand.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 or
* (at your option) any later version of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw.h"
#include "omap.h"
/* SDRAM Controller Subsystem */
struct omap_sdrc_s {
uint8_t config;
};
void omap_sdrc_reset(struct omap_sdrc_s *s)
{
s->config = 0x10;
}
static uint32_t omap_sdrc_read(void *opaque, target_phys_addr_t addr)
{
struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque;
switch (addr) {
case 0x00: /* SDRC_REVISION */
return 0x20;
case 0x10: /* SDRC_SYSCONFIG */
return s->config;
case 0x14: /* SDRC_SYSSTATUS */
return 1; /* RESETDONE */
case 0x40: /* SDRC_CS_CFG */
case 0x44: /* SDRC_SHARING */
case 0x48: /* SDRC_ERR_ADDR */
case 0x4c: /* SDRC_ERR_TYPE */
case 0x60: /* SDRC_DLLA_SCTRL */
case 0x64: /* SDRC_DLLA_STATUS */
case 0x68: /* SDRC_DLLB_CTRL */
case 0x6c: /* SDRC_DLLB_STATUS */
case 0x70: /* SDRC_POWER */
case 0x80: /* SDRC_MCFG_0 */
case 0x84: /* SDRC_MR_0 */
case 0x88: /* SDRC_EMR1_0 */
case 0x8c: /* SDRC_EMR2_0 */
case 0x90: /* SDRC_EMR3_0 */
case 0x94: /* SDRC_DCDL1_CTRL */
case 0x98: /* SDRC_DCDL2_CTRL */
case 0x9c: /* SDRC_ACTIM_CTRLA_0 */
case 0xa0: /* SDRC_ACTIM_CTRLB_0 */
case 0xa4: /* SDRC_RFR_CTRL_0 */
case 0xa8: /* SDRC_MANUAL_0 */
case 0xb0: /* SDRC_MCFG_1 */
case 0xb4: /* SDRC_MR_1 */
case 0xb8: /* SDRC_EMR1_1 */
case 0xbc: /* SDRC_EMR2_1 */
case 0xc0: /* SDRC_EMR3_1 */
case 0xc4: /* SDRC_ACTIM_CTRLA_1 */
case 0xc8: /* SDRC_ACTIM_CTRLB_1 */
case 0xd4: /* SDRC_RFR_CTRL_1 */
case 0xd8: /* SDRC_MANUAL_1 */
return 0x00;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_sdrc_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque;
switch (addr) {
case 0x00: /* SDRC_REVISION */
case 0x14: /* SDRC_SYSSTATUS */
case 0x48: /* SDRC_ERR_ADDR */
case 0x64: /* SDRC_DLLA_STATUS */
case 0x6c: /* SDRC_DLLB_STATUS */
OMAP_RO_REG(addr);
return;
case 0x10: /* SDRC_SYSCONFIG */
if ((value >> 3) != 0x2)
fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
__FUNCTION__, value >> 3);
if (value & 2)
omap_sdrc_reset(s);
s->config = value & 0x18;
break;
case 0x40: /* SDRC_CS_CFG */
case 0x44: /* SDRC_SHARING */
case 0x4c: /* SDRC_ERR_TYPE */
case 0x60: /* SDRC_DLLA_SCTRL */
case 0x68: /* SDRC_DLLB_CTRL */
case 0x70: /* SDRC_POWER */
case 0x80: /* SDRC_MCFG_0 */
case 0x84: /* SDRC_MR_0 */
case 0x88: /* SDRC_EMR1_0 */
case 0x8c: /* SDRC_EMR2_0 */
case 0x90: /* SDRC_EMR3_0 */
case 0x94: /* SDRC_DCDL1_CTRL */
case 0x98: /* SDRC_DCDL2_CTRL */
case 0x9c: /* SDRC_ACTIM_CTRLA_0 */
case 0xa0: /* SDRC_ACTIM_CTRLB_0 */
case 0xa4: /* SDRC_RFR_CTRL_0 */
case 0xa8: /* SDRC_MANUAL_0 */
case 0xb0: /* SDRC_MCFG_1 */
case 0xb4: /* SDRC_MR_1 */
case 0xb8: /* SDRC_EMR1_1 */
case 0xbc: /* SDRC_EMR2_1 */
case 0xc0: /* SDRC_EMR3_1 */
case 0xc4: /* SDRC_ACTIM_CTRLA_1 */
case 0xc8: /* SDRC_ACTIM_CTRLB_1 */
case 0xd4: /* SDRC_RFR_CTRL_1 */
case 0xd8: /* SDRC_MANUAL_1 */
break;
default:
OMAP_BAD_REG(addr);
return;
}
}
static CPUReadMemoryFunc * const omap_sdrc_readfn[] = {
omap_badwidth_read32,
omap_badwidth_read32,
omap_sdrc_read,
};
static CPUWriteMemoryFunc * const omap_sdrc_writefn[] = {
omap_badwidth_write32,
omap_badwidth_write32,
omap_sdrc_write,
};
struct omap_sdrc_s *omap_sdrc_init(target_phys_addr_t base)
{
int iomemtype;
struct omap_sdrc_s *s = (struct omap_sdrc_s *)
g_malloc0(sizeof(struct omap_sdrc_s));
omap_sdrc_reset(s);
iomemtype = cpu_register_io_memory(omap_sdrc_readfn,
omap_sdrc_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, 0x1000, iomemtype);
return s;
}
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