/* * 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 { 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, target_phys_addr_t 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, target_phys_addr_t 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, target_phys_addr_t 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, &omap_sdrc_ops, s, "omap.sdrc", 0x1000); memory_region_add_subregion(sysmem, base, &s->iomem); return s; }