[qemu.git] / hw / misc / omap_sdrc.c

/*
 * TI OMAP SDRAM controller emulation.
 *
 * Copyright (C) 2007-2008 Nokia Corporation
 * Written by Andrzej Zaborowski <[email protected]>
 *
 * 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) {
        return omap_badwidth_write32(opaque, addr, value);
    }

    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 = (struct omap_sdrc_s *)
            g_malloc0(sizeof(struct omap_sdrc_s));

    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;
}
Commit	Line	Data
0bf43016	1	/*
	2	* TI OMAP SDRAM controller emulation.
	3	*
	4	* Copyright (C) 2007-2008 Nokia Corporation
	5	* Written by Andrzej Zaborowski <[email protected]>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License as
	9	* published by the Free Software Foundation; either version 2 or
	10	* (at your option) any later version of the License.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License along
	18	* with this program; if not, see <http://www.gnu.org/licenses/>.
	19	*/
83c9f4ca	20	#include "hw/hw.h"
0d09e41a	21	#include "hw/arm/omap.h"
0bf43016	22
	23	/* SDRAM Controller Subsystem */
	24	struct omap_sdrc_s {
6a0148e7	25	MemoryRegion iomem;
0bf43016	26	uint8_t config;
	27	};
	28
	29	void omap_sdrc_reset(struct omap_sdrc_s *s)
	30	{
	31	s->config = 0x10;
	32	}
	33
a8170e5e	34	static uint64_t omap_sdrc_read(void *opaque, hwaddr addr,
6a0148e7	35	unsigned size)
0bf43016	36	{
	37	struct omap_sdrc_s s = (struct omap_sdrc_s ) opaque;
	38
6a0148e7 AK	39	if (size != 4) {
	40	return omap_badwidth_read32(opaque, addr);
	41	}
	42
0bf43016	43	switch (addr) {
	44	case 0x00: /* SDRC_REVISION */
	45	return 0x20;
	46
	47	case 0x10: /* SDRC_SYSCONFIG */
	48	return s->config;
	49
	50	case 0x14: /* SDRC_SYSSTATUS */
	51	return 1; /* RESETDONE */
	52
	53	case 0x40: /* SDRC_CS_CFG */
	54	case 0x44: /* SDRC_SHARING */
	55	case 0x48: /* SDRC_ERR_ADDR */
	56	case 0x4c: /* SDRC_ERR_TYPE */
	57	case 0x60: /* SDRC_DLLA_SCTRL */
	58	case 0x64: /* SDRC_DLLA_STATUS */
	59	case 0x68: /* SDRC_DLLB_CTRL */
	60	case 0x6c: /* SDRC_DLLB_STATUS */
	61	case 0x70: /* SDRC_POWER */
	62	case 0x80: /* SDRC_MCFG_0 */
	63	case 0x84: /* SDRC_MR_0 */
	64	case 0x88: /* SDRC_EMR1_0 */
	65	case 0x8c: /* SDRC_EMR2_0 */
	66	case 0x90: /* SDRC_EMR3_0 */
	67	case 0x94: /* SDRC_DCDL1_CTRL */
	68	case 0x98: /* SDRC_DCDL2_CTRL */
	69	case 0x9c: /* SDRC_ACTIM_CTRLA_0 */
	70	case 0xa0: /* SDRC_ACTIM_CTRLB_0 */
	71	case 0xa4: /* SDRC_RFR_CTRL_0 */
	72	case 0xa8: /* SDRC_MANUAL_0 */
	73	case 0xb0: /* SDRC_MCFG_1 */
	74	case 0xb4: /* SDRC_MR_1 */
	75	case 0xb8: /* SDRC_EMR1_1 */
	76	case 0xbc: /* SDRC_EMR2_1 */
	77	case 0xc0: /* SDRC_EMR3_1 */
	78	case 0xc4: /* SDRC_ACTIM_CTRLA_1 */
	79	case 0xc8: /* SDRC_ACTIM_CTRLB_1 */
	80	case 0xd4: /* SDRC_RFR_CTRL_1 */
	81	case 0xd8: /* SDRC_MANUAL_1 */
	82	return 0x00;
	83	}
	84
	85	OMAP_BAD_REG(addr);
	86	return 0;
	87	}
	88
a8170e5e	89	static void omap_sdrc_write(void *opaque, hwaddr addr,
6a0148e7	90	uint64_t value, unsigned size)
0bf43016	91	{
	92	struct omap_sdrc_s s = (struct omap_sdrc_s ) opaque;
	93
6a0148e7 AK	94	if (size != 4) {
	95	return omap_badwidth_write32(opaque, addr, value);
	96	}
	97
0bf43016	98	switch (addr) {
	99	case 0x00: /* SDRC_REVISION */
	100	case 0x14: /* SDRC_SYSSTATUS */
	101	case 0x48: /* SDRC_ERR_ADDR */
	102	case 0x64: /* SDRC_DLLA_STATUS */
	103	case 0x6c: /* SDRC_DLLB_STATUS */
	104	OMAP_RO_REG(addr);
	105	return;
	106
	107	case 0x10: /* SDRC_SYSCONFIG */
	108	if ((value >> 3) != 0x2)
	109	fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
6a0148e7	110	__FUNCTION__, (unsigned)value >> 3);
0bf43016	111	if (value & 2)
	112	omap_sdrc_reset(s);
	113	s->config = value & 0x18;
	114	break;
	115
	116	case 0x40: /* SDRC_CS_CFG */
	117	case 0x44: /* SDRC_SHARING */
	118	case 0x4c: /* SDRC_ERR_TYPE */
	119	case 0x60: /* SDRC_DLLA_SCTRL */
	120	case 0x68: /* SDRC_DLLB_CTRL */
	121	case 0x70: /* SDRC_POWER */
	122	case 0x80: /* SDRC_MCFG_0 */
	123	case 0x84: /* SDRC_MR_0 */
	124	case 0x88: /* SDRC_EMR1_0 */
	125	case 0x8c: /* SDRC_EMR2_0 */
	126	case 0x90: /* SDRC_EMR3_0 */
	127	case 0x94: /* SDRC_DCDL1_CTRL */
	128	case 0x98: /* SDRC_DCDL2_CTRL */
	129	case 0x9c: /* SDRC_ACTIM_CTRLA_0 */
	130	case 0xa0: /* SDRC_ACTIM_CTRLB_0 */
	131	case 0xa4: /* SDRC_RFR_CTRL_0 */
	132	case 0xa8: /* SDRC_MANUAL_0 */
	133	case 0xb0: /* SDRC_MCFG_1 */
	134	case 0xb4: /* SDRC_MR_1 */
	135	case 0xb8: /* SDRC_EMR1_1 */
	136	case 0xbc: /* SDRC_EMR2_1 */
	137	case 0xc0: /* SDRC_EMR3_1 */
	138	case 0xc4: /* SDRC_ACTIM_CTRLA_1 */
	139	case 0xc8: /* SDRC_ACTIM_CTRLB_1 */
	140	case 0xd4: /* SDRC_RFR_CTRL_1 */
	141	case 0xd8: /* SDRC_MANUAL_1 */
	142	break;
	143
	144	default:
	145	OMAP_BAD_REG(addr);
	146	return;
	147	}
	148	}
	149
6a0148e7 AK	150	static const MemoryRegionOps omap_sdrc_ops = {
	151	.read = omap_sdrc_read,
	152	.write = omap_sdrc_write,
	153	.endianness = DEVICE_NATIVE_ENDIAN,
0bf43016	154	};
0bf43016	155
6a0148e7	156	struct omap_sdrc_s omap_sdrc_init(MemoryRegion sysmem,
a8170e5e	157	hwaddr base)
0bf43016	158	{
0bf43016	159	struct omap_sdrc_s s = (struct omap_sdrc_s )
7267c094	160	g_malloc0(sizeof(struct omap_sdrc_s));
0bf43016	161
	162	omap_sdrc_reset(s);
	163
2c9b15ca	164	memory_region_init_io(&s->iomem, NULL, &omap_sdrc_ops, s, "omap.sdrc", 0x1000);
6a0148e7	165	memory_region_add_subregion(sysmem, base, &s->iomem);
0bf43016	166
	167	return s;
	168	}