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omap_gpmc.c
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omap_gpmc.c
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/*
* TI OMAP general purpose memory controller emulation.
*
* Copyright (C) 2007-2009 Nokia Corporation
* Original code written by Andrzej Zaborowski <andrew@openedhand.com>
* Enhancements for OMAP3 and NAND support written by Juha Riihimäki
*
* 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 "flash.h"
#include "omap.h"
/* General-Purpose Memory Controller */
struct omap_gpmc_s {
qemu_irq irq;
uint8_t sysconfig;
uint16_t irqst;
uint16_t irqen;
uint16_t timeout;
uint16_t config;
uint32_t prefconfig[2];
int prefcontrol;
int preffifo;
int prefcount;
struct omap_gpmc_cs_file_s {
uint32_t config[7];
target_phys_addr_t base;
size_t size;
int iomemtype;
void (*base_update)(void *opaque, target_phys_addr_t new);
void (*unmap)(void *opaque);
void *opaque;
} cs_file[8];
int ecc_cs;
int ecc_ptr;
uint32_t ecc_cfg;
ECCState ecc[9];
};
static void omap_gpmc_int_update(struct omap_gpmc_s *s)
{
qemu_set_irq(s->irq, s->irqen & s->irqst);
}
static void omap_gpmc_cs_map(struct omap_gpmc_cs_file_s *f, int base, int mask)
{
/* TODO: check for overlapping regions and report access errors */
if ((mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf) ||
(base < 0 || base >= 0x40) ||
(base & 0x0f & ~mask)) {
fprintf(stderr, "%s: wrong cs address mapping/decoding!\n",
__FUNCTION__);
return;
}
if (!f->opaque)
return;
f->base = base << 24;
f->size = (0x0fffffff & ~(mask << 24)) + 1;
/* TODO: rather than setting the size of the mapping (which should be
* constant), the mask should cause wrapping of the address space, so
* that the same memory becomes accessible at every <i>size</i> bytes
* starting from <i>base</i>. */
if (f->iomemtype)
cpu_register_physical_memory(f->base, f->size, f->iomemtype);
if (f->base_update)
f->base_update(f->opaque, f->base);
}
static void omap_gpmc_cs_unmap(struct omap_gpmc_cs_file_s *f)
{
if (f->size) {
if (f->unmap)
f->unmap(f->opaque);
if (f->iomemtype)
cpu_register_physical_memory(f->base, f->size, IO_MEM_UNASSIGNED);
f->base = 0;
f->size = 0;
}
}
void omap_gpmc_reset(struct omap_gpmc_s *s)
{
int i;
s->sysconfig = 0;
s->irqst = 0;
s->irqen = 0;
omap_gpmc_int_update(s);
s->timeout = 0;
s->config = 0xa00;
s->prefconfig[0] = 0x00004000;
s->prefconfig[1] = 0x00000000;
s->prefcontrol = 0;
s->preffifo = 0;
s->prefcount = 0;
for (i = 0; i < 8; i ++) {
if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_unmap(s->cs_file + i);
s->cs_file[i].config[0] = i ? 1 << 12 : 0;
s->cs_file[i].config[1] = 0x101001;
s->cs_file[i].config[2] = 0x020201;
s->cs_file[i].config[3] = 0x10031003;
s->cs_file[i].config[4] = 0x10f1111;
s->cs_file[i].config[5] = 0;
s->cs_file[i].config[6] = 0xf00 | (i ? 0 : 1 << 6);
if (s->cs_file[i].config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(&s->cs_file[i],
s->cs_file[i].config[6] & 0x1f, /* MASKADDR */
(s->cs_file[i].config[6] >> 8 & 0xf)); /* BASEADDR */
}
omap_gpmc_cs_map(s->cs_file, 0, 0xf);
s->ecc_cs = 0;
s->ecc_ptr = 0;
s->ecc_cfg = 0x3fcff000;
for (i = 0; i < 9; i ++)
ecc_reset(&s->ecc[i]);
}
static uint32_t omap_gpmc_read(void *opaque, target_phys_addr_t addr)
{
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
int cs;
struct omap_gpmc_cs_file_s *f;
switch (addr) {
case 0x000: /* GPMC_REVISION */
return 0x20;
case 0x010: /* GPMC_SYSCONFIG */
return s->sysconfig;
case 0x014: /* GPMC_SYSSTATUS */
return 1; /* RESETDONE */
case 0x018: /* GPMC_IRQSTATUS */
return s->irqst;
case 0x01c: /* GPMC_IRQENABLE */
return s->irqen;
case 0x040: /* GPMC_TIMEOUT_CONTROL */
return s->timeout;
case 0x044: /* GPMC_ERR_ADDRESS */
case 0x048: /* GPMC_ERR_TYPE */
return 0;
case 0x050: /* GPMC_CONFIG */
return s->config;
case 0x054: /* GPMC_STATUS */
return 0x001;
case 0x060 ... 0x1d4:
cs = (addr - 0x060) / 0x30;
addr -= cs * 0x30;
f = s->cs_file + cs;
switch (addr) {
case 0x60: /* GPMC_CONFIG1 */
return f->config[0];
case 0x64: /* GPMC_CONFIG2 */
return f->config[1];
case 0x68: /* GPMC_CONFIG3 */
return f->config[2];
case 0x6c: /* GPMC_CONFIG4 */
return f->config[3];
case 0x70: /* GPMC_CONFIG5 */
return f->config[4];
case 0x74: /* GPMC_CONFIG6 */
return f->config[5];
case 0x78: /* GPMC_CONFIG7 */
return f->config[6];
case 0x84: /* GPMC_NAND_DATA */
return 0;
}
break;
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
return s->prefconfig[0];
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
return s->prefconfig[1];
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
return s->prefcontrol;
case 0x1f0: /* GPMC_PREFETCH_STATUS */
return (s->preffifo << 24) |
((s->preffifo >
((s->prefconfig[0] >> 8) & 0x7f) ? 1 : 0) << 16) |
s->prefcount;
case 0x1f4: /* GPMC_ECC_CONFIG */
return s->ecc_cs;
case 0x1f8: /* GPMC_ECC_CONTROL */
return s->ecc_ptr;
case 0x1fc: /* GPMC_ECC_SIZE_CONFIG */
return s->ecc_cfg;
case 0x200 ... 0x220: /* GPMC_ECC_RESULT */
cs = (addr & 0x1f) >> 2;
/* TODO: check correctness */
return
((s->ecc[cs].cp & 0x07) << 0) |
((s->ecc[cs].cp & 0x38) << 13) |
((s->ecc[cs].lp[0] & 0x1ff) << 3) |
((s->ecc[cs].lp[1] & 0x1ff) << 19);
case 0x230: /* GPMC_TESTMODE_CTRL */
return 0;
case 0x234: /* GPMC_PSA_LSB */
case 0x238: /* GPMC_PSA_MSB */
return 0x00000000;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_gpmc_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
int cs;
struct omap_gpmc_cs_file_s *f;
switch (addr) {
case 0x000: /* GPMC_REVISION */
case 0x014: /* GPMC_SYSSTATUS */
case 0x054: /* GPMC_STATUS */
case 0x1f0: /* GPMC_PREFETCH_STATUS */
case 0x200 ... 0x220: /* GPMC_ECC_RESULT */
case 0x234: /* GPMC_PSA_LSB */
case 0x238: /* GPMC_PSA_MSB */
OMAP_RO_REG(addr);
break;
case 0x010: /* GPMC_SYSCONFIG */
if ((value >> 3) == 0x3)
fprintf(stderr, "%s: bad SDRAM idle mode %i\n",
__FUNCTION__, value >> 3);
if (value & 2)
omap_gpmc_reset(s);
s->sysconfig = value & 0x19;
break;
case 0x018: /* GPMC_IRQSTATUS */
s->irqen = ~value;
omap_gpmc_int_update(s);
break;
case 0x01c: /* GPMC_IRQENABLE */
s->irqen = value & 0xf03;
omap_gpmc_int_update(s);
break;
case 0x040: /* GPMC_TIMEOUT_CONTROL */
s->timeout = value & 0x1ff1;
break;
case 0x044: /* GPMC_ERR_ADDRESS */
case 0x048: /* GPMC_ERR_TYPE */
break;
case 0x050: /* GPMC_CONFIG */
s->config = value & 0xf13;
break;
case 0x060 ... 0x1d4:
cs = (addr - 0x060) / 0x30;
addr -= cs * 0x30;
f = s->cs_file + cs;
switch (addr) {
case 0x60: /* GPMC_CONFIG1 */
f->config[0] = value & 0xffef3e13;
break;
case 0x64: /* GPMC_CONFIG2 */
f->config[1] = value & 0x001f1f8f;
break;
case 0x68: /* GPMC_CONFIG3 */
f->config[2] = value & 0x001f1f8f;
break;
case 0x6c: /* GPMC_CONFIG4 */
f->config[3] = value & 0x1f8f1f8f;
break;
case 0x70: /* GPMC_CONFIG5 */
f->config[4] = value & 0x0f1f1f1f;
break;
case 0x74: /* GPMC_CONFIG6 */
f->config[5] = value & 0x00000fcf;
break;
case 0x78: /* GPMC_CONFIG7 */
if ((f->config[6] ^ value) & 0xf7f) {
if (f->config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_unmap(f);
if (value & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(f, value & 0x1f, /* MASKADDR */
(value >> 8 & 0xf)); /* BASEADDR */
}
f->config[6] = value & 0x00000f7f;
break;
case 0x7c: /* GPMC_NAND_COMMAND */
case 0x80: /* GPMC_NAND_ADDRESS */
case 0x84: /* GPMC_NAND_DATA */
break;
default:
goto bad_reg;
}
break;
case 0x1e0: /* GPMC_PREFETCH_CONFIG1 */
s->prefconfig[0] = value & 0x7f8f7fbf;
/* TODO: update interrupts, fifos, dmas */
break;
case 0x1e4: /* GPMC_PREFETCH_CONFIG2 */
s->prefconfig[1] = value & 0x3fff;
break;
case 0x1ec: /* GPMC_PREFETCH_CONTROL */
s->prefcontrol = value & 1;
if (s->prefcontrol) {
if (s->prefconfig[0] & 1)
s->preffifo = 0x40;
else
s->preffifo = 0x00;
}
/* TODO: start */
break;
case 0x1f4: /* GPMC_ECC_CONFIG */
s->ecc_cs = 0x8f;
break;
case 0x1f8: /* GPMC_ECC_CONTROL */
if (value & (1 << 8))
for (cs = 0; cs < 9; cs ++)
ecc_reset(&s->ecc[cs]);
s->ecc_ptr = value & 0xf;
if (s->ecc_ptr == 0 || s->ecc_ptr > 9) {
s->ecc_ptr = 0;
s->ecc_cs &= ~1;
}
break;
case 0x1fc: /* GPMC_ECC_SIZE_CONFIG */
s->ecc_cfg = value & 0x3fcff1ff;
break;
case 0x230: /* GPMC_TESTMODE_CTRL */
if (value & 7)
fprintf(stderr, "%s: test mode enable attempt\n", __FUNCTION__);
break;
default:
bad_reg:
OMAP_BAD_REG(addr);
return;
}
}
static CPUReadMemoryFunc * const omap_gpmc_readfn[] = {
omap_badwidth_read32, /* TODO */
omap_badwidth_read32, /* TODO */
omap_gpmc_read,
};
static CPUWriteMemoryFunc * const omap_gpmc_writefn[] = {
omap_badwidth_write32, /* TODO */
omap_badwidth_write32, /* TODO */
omap_gpmc_write,
};
struct omap_gpmc_s *omap_gpmc_init(target_phys_addr_t base, qemu_irq irq)
{
int iomemtype;
struct omap_gpmc_s *s = (struct omap_gpmc_s *)
qemu_mallocz(sizeof(struct omap_gpmc_s));
omap_gpmc_reset(s);
iomemtype = cpu_register_io_memory(omap_gpmc_readfn,
omap_gpmc_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, 0x1000, iomemtype);
return s;
}
void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, int iomemtype,
void (*base_upd)(void *opaque, target_phys_addr_t new),
void (*unmap)(void *opaque), void *opaque)
{
struct omap_gpmc_cs_file_s *f;
if (cs < 0 || cs >= 8) {
fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
exit(-1);
}
f = &s->cs_file[cs];
f->iomemtype = iomemtype;
f->base_update = base_upd;
f->unmap = unmap;
f->opaque = opaque;
if (f->config[6] & (1 << 6)) /* CSVALID */
omap_gpmc_cs_map(f, f->config[6] & 0x1f, /* MASKADDR */
(f->config[6] >> 8 & 0xf)); /* BASEADDR */
}