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qemu/hw/misc/omap_sdrc.c

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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/hw.h"
#include "hw/arm/omap.h"
/* SDRAM Controller Subsystem */
struct omap_sdrc_s {
MemoryRegion iomem;
uint8_t config;
};
void omap_sdrc_reset(struct omap_sdrc_s *s)
{
s->config = 0x10;
}
static uint64_t omap_sdrc_read(void *opaque, hwaddr addr,
unsigned size)
{
struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque;
if (size != 4) {
return omap_badwidth_read32(opaque, addr);
}
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, hwaddr addr,
uint64_t value, unsigned size)
{
struct omap_sdrc_s *s = (struct omap_sdrc_s *) opaque;
if (size != 4) {
omap: Fix warnings from Sparse Sparse report: arm/omap1.c:1015:9: warning: returning void-valued expression arm/omap1.c:1084:9: warning: returning void-valued expression arm/omap1.c:1178:9: warning: returning void-valued expression arm/omap1.c:1287:9: warning: returning void-valued expression arm/omap1.c:1382:9: warning: returning void-valued expression arm/omap1.c:1650:9: warning: returning void-valued expression arm/omap1.c:1778:9: warning: returning void-valued expression arm/omap1.c:1985:9: warning: returning void-valued expression arm/omap1.c:210:9: warning: returning void-valued expression arm/omap1.c:2213:9: warning: returning void-valued expression arm/omap1.c:2352:9: warning: returning void-valued expression arm/omap1.c:2447:9: warning: returning void-valued expression arm/omap1.c:2640:9: warning: returning void-valued expression arm/omap1.c:317:9: warning: returning void-valued expression arm/omap1.c:3413:13: warning: returning void-valued expression arm/omap1.c:3414:13: warning: returning void-valued expression arm/omap1.c:3415:14: warning: returning void-valued expression arm/omap1.c:3589:9: warning: returning void-valued expression arm/omap1.c:443:9: warning: returning void-valued expression arm/omap1.c:588:9: warning: returning void-valued expression arm/omap1.c:860:9: warning: returning void-valued expression arm/omap2.c:1362:9: warning: returning void-valued expression arm/omap2.c:450:9: warning: returning void-valued expression arm/omap2.c:695:9: warning: returning void-valued expression arm/omap2.c:760:9: warning: returning void-valued expression hw/char/omap_uart.c:115:9: warning: returning void-valued expression hw/display/omap_dss.c:1019:9: warning: returning void-valued expression hw/display/omap_dss.c:215:9: warning: returning void-valued expression hw/display/omap_dss.c:380:9: warning: returning void-valued expression hw/display/omap_dss.c:739:9: warning: returning void-valued expression hw/display/omap_dss.c:931:9: warning: returning void-valued expression hw/dma/omap_dma.c:139:5: warning: returning void-valued expression hw/dma/omap_dma.c:1505:9: warning: returning void-valued expression hw/dma/omap_dma.c:1860:9: warning: returning void-valued expression hw/gpio/omap_gpio.c:116:9: warning: returning void-valued expression hw/misc/omap_gpmc.c:627:9: warning: returning void-valued expression hw/misc/omap_l4.c:85:9: warning: returning void-valued expression hw/misc/omap_sdrc.c:95:9: warning: returning void-valued expression hw/misc/omap_tap.c:98:9: warning: returning void-valued expression hw/sd/omap_mmc.c:409:9: warning: returning void-valued expression hw/ssi/omap_spi.c:229:9: warning: returning void-valued expression hw/timer/omap_gptimer.c:447:9: warning: returning void-valued expression Cc: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Stefan Weil <sw@weilnetz.de> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2015-03-09 02:21:13 +08:00
omap_badwidth_write32(opaque, addr, value);
return;
}
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__, (unsigned)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 const MemoryRegionOps omap_sdrc_ops = {
.read = omap_sdrc_read,
.write = omap_sdrc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
struct omap_sdrc_s *omap_sdrc_init(MemoryRegion *sysmem,
hwaddr base)
{
struct omap_sdrc_s *s = g_new0(struct omap_sdrc_s, 1);
omap_sdrc_reset(s);
memory_region_init_io(&s->iomem, NULL, &omap_sdrc_ops, s, "omap.sdrc", 0x1000);
memory_region_add_subregion(sysmem, base, &s->iomem);
return s;
}