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qemu-patch-raspberry4/hw/omap_gpmc.c
Juha Riihimäki 856f2df771 omap_gpmc: Accept a zero mask field on omap3630 
OMAP3630 adds an extra bit of address masking, so a mask of
0xb1111 is valid. Unfortunately the GPMC_REVISION is the same as
on the OMAP3430 which only has three bits of address masking, so
we have to derive this feature directly from the OMAP revision
rather than from the GPMC revision.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by:  Peter Maydell <peter.maydell@linaro.org>
2011-08-28 16:37:13 +00:00

630 lines
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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"
#include "memory.h"
#include "exec-memory.h"
/* General-Purpose Memory Controller */
struct omap_gpmc_s {
qemu_irq irq;
MemoryRegion iomem;
int accept_256;
uint8_t revision;
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];
MemoryRegion *iomem;
MemoryRegion container;
MemoryRegion nandiomem;
DeviceState *dev;
} cs_file[8];
int ecc_cs;
int ecc_ptr;
uint32_t ecc_cfg;
ECCState ecc[9];
};
#define OMAP_GPMC_8BIT 0
#define OMAP_GPMC_16BIT 1
#define OMAP_GPMC_NOR 0
#define OMAP_GPMC_NAND 2
static int omap_gpmc_devtype(struct omap_gpmc_cs_file_s *f)
{
return (f->config[0] >> 10) & 3;
}
static int omap_gpmc_devsize(struct omap_gpmc_cs_file_s *f)
{
/* devsize field is really 2 bits but we ignore the high
* bit to ensure consistent behaviour if the guest sets
* it (values 2 and 3 are reserved in the TRM)
*/
return (f->config[0] >> 12) & 1;
}
static void omap_gpmc_int_update(struct omap_gpmc_s *s)
{
qemu_set_irq(s->irq, s->irqen & s->irqst);
}
/* Access functions for when a NAND-like device is mapped into memory:
* all addresses in the region behave like accesses to the relevant
* GPMC_NAND_DATA_i register (which is actually implemented to call these)
*/
static uint64_t omap_nand_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
uint64_t v;
nand_setpins(f->dev, 0, 0, 0, 1, 0);
switch (omap_gpmc_devsize(f)) {
case OMAP_GPMC_8BIT:
v = nand_getio(f->dev);
if (size == 1) {
return v;
}
v |= (nand_getio(f->dev) << 8);
if (size == 2) {
return v;
}
v |= (nand_getio(f->dev) << 16);
v |= (nand_getio(f->dev) << 24);
return v;
case OMAP_GPMC_16BIT:
v = nand_getio(f->dev);
if (size == 1) {
/* 8 bit read from 16 bit device : probably a guest bug */
return v & 0xff;
}
if (size == 2) {
return v;
}
v |= (nand_getio(f->dev) << 16);
return v;
default:
abort();
}
}
static void omap_nand_setio(DeviceState *dev, uint64_t value,
int nandsize, int size)
{
/* Write the specified value to the NAND device, respecting
* both size of the NAND device and size of the write access.
*/
switch (nandsize) {
case OMAP_GPMC_8BIT:
switch (size) {
case 1:
nand_setio(dev, value & 0xff);
break;
case 2:
nand_setio(dev, value & 0xff);
nand_setio(dev, (value >> 8) & 0xff);
break;
case 4:
default:
nand_setio(dev, value & 0xff);
nand_setio(dev, (value >> 8) & 0xff);
nand_setio(dev, (value >> 16) & 0xff);
nand_setio(dev, (value >> 24) & 0xff);
break;
}
case OMAP_GPMC_16BIT:
switch (size) {
case 1:
/* writing to a 16bit device with 8bit access is probably a guest
* bug; pass the value through anyway.
*/
case 2:
nand_setio(dev, value & 0xffff);
break;
case 4:
default:
nand_setio(dev, value & 0xffff);
nand_setio(dev, (value >> 16) & 0xffff);
break;
}
}
}
static void omap_nand_write(void *opaque, target_phys_addr_t addr,
uint64_t value, unsigned size)
{
struct omap_gpmc_cs_file_s *f = (struct omap_gpmc_cs_file_s *)opaque;
nand_setpins(f->dev, 0, 0, 0, 1, 0);
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
}
static const MemoryRegionOps omap_nand_ops = {
.read = omap_nand_read,
.write = omap_nand_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static MemoryRegion *omap_gpmc_cs_memregion(struct omap_gpmc_s *s, int cs)
{
/* Return the MemoryRegion* to map/unmap for this chipselect */
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
if (omap_gpmc_devtype(f) == OMAP_GPMC_NOR) {
return f->iomem;
}
return &f->nandiomem;
}
static void omap_gpmc_cs_map(struct omap_gpmc_s *s, int cs)
{
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
uint32_t mask = (f->config[6] >> 8) & 0xf;
uint32_t base = f->config[6] & 0x3f;
uint32_t size;
if (!f->iomem && !f->dev) {
return;
}
if (!(f->config[6] & (1 << 6))) {
/* Do nothing unless CSVALID */
return;
}
/* TODO: check for overlapping regions and report access errors */
if (mask != 0x8 && mask != 0xc && mask != 0xe && mask != 0xf
&& !(s->accept_256 && !mask)) {
fprintf(stderr, "%s: invalid chip-select mask address (0x%x)\n",
__func__, mask);
}
base <<= 24;
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>. */
memory_region_init(&f->container, "omap-gpmc-file", size);
memory_region_add_subregion(&f->container, 0,
omap_gpmc_cs_memregion(s, cs));
memory_region_add_subregion(get_system_memory(), base,
&f->container);
}
static void omap_gpmc_cs_unmap(struct omap_gpmc_s *s, int cs)
{
struct omap_gpmc_cs_file_s *f = &s->cs_file[cs];
if (!(f->config[6] & (1 << 6))) {
/* Do nothing unless CSVALID */
return;
}
if (!f->iomem && !f->dev) {
return;
}
memory_region_del_subregion(get_system_memory(), &f->container);
memory_region_del_subregion(&f->container, omap_gpmc_cs_memregion(s, cs));
memory_region_destroy(&f->container);
}
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 ++) {
omap_gpmc_cs_unmap(s, i);
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);
s->cs_file[i].config[6] = 0xf00;
/* In theory we could probe attached devices for some CFG1
* bits here, but we just retain them across resets as they
* were set initially by omap_gpmc_attach().
*/
if (i == 0) {
s->cs_file[i].config[0] &= 0x00433e00;
s->cs_file[i].config[6] |= 1 << 6; /* CSVALID */
omap_gpmc_cs_map(s, i);
} else {
s->cs_file[i].config[0] &= 0x00403c00;
}
}
s->ecc_cs = 0;
s->ecc_ptr = 0;
s->ecc_cfg = 0x3fcff000;
for (i = 0; i < 9; i ++)
ecc_reset(&s->ecc[i]);
}
static int gpmc_wordaccess_only(target_phys_addr_t addr)
{
/* Return true if the register offset is to a register that
* only permits word width accesses.
* Non-word accesses are only OK for GPMC_NAND_DATA/ADDRESS/COMMAND
* for any chipselect.
*/
if (addr >= 0x60 && addr <= 0x1d4) {
int cs = (addr - 0x60) / 0x30;
addr -= cs * 0x30;
if (addr >= 0x7c && addr < 0x88) {
/* GPMC_NAND_COMMAND, GPMC_NAND_ADDRESS, GPMC_NAND_DATA */
return 0;
}
}
return 1;
}
static uint64_t omap_gpmc_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
int cs;
struct omap_gpmc_cs_file_s *f;
if (size != 4 && gpmc_wordaccess_only(addr)) {
return omap_badwidth_read32(opaque, addr);
}
switch (addr) {
case 0x000: /* GPMC_REVISION */
return s->revision;
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 ... 0x87: /* GPMC_NAND_DATA */
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
return omap_nand_read(f, 0, size);
}
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,
uint64_t value, unsigned size)
{
struct omap_gpmc_s *s = (struct omap_gpmc_s *) opaque;
int cs;
struct omap_gpmc_cs_file_s *f;
if (size != 4 && gpmc_wordaccess_only(addr)) {
return omap_badwidth_write32(opaque, addr, value);
}
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 %"PRIi64"\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) {
omap_gpmc_cs_unmap(s, cs);
f->config[6] = value & 0x00000f7f;
omap_gpmc_cs_map(s, cs);
}
break;
case 0x7c ... 0x7f: /* GPMC_NAND_COMMAND */
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
nand_setpins(f->dev, 1, 0, 0, 1, 0); /* CLE */
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
}
break;
case 0x80 ... 0x83: /* GPMC_NAND_ADDRESS */
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
nand_setpins(f->dev, 0, 1, 0, 1, 0); /* ALE */
omap_nand_setio(f->dev, value, omap_gpmc_devsize(f), size);
}
break;
case 0x84 ... 0x87: /* GPMC_NAND_DATA */
if (omap_gpmc_devtype(f) == OMAP_GPMC_NAND) {
omap_nand_write(f, 0, value, size);
}
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 const MemoryRegionOps omap_gpmc_ops = {
.read = omap_gpmc_read,
.write = omap_gpmc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
struct omap_gpmc_s *omap_gpmc_init(struct omap_mpu_state_s *mpu,
target_phys_addr_t base, qemu_irq irq)
{
int cs;
struct omap_gpmc_s *s = (struct omap_gpmc_s *)
g_malloc0(sizeof(struct omap_gpmc_s));
memory_region_init_io(&s->iomem, &omap_gpmc_ops, s, "omap-gpmc", 0x1000);
memory_region_add_subregion(get_system_memory(), base, &s->iomem);
s->irq = irq;
s->accept_256 = cpu_is_omap3630(mpu);
s->revision = cpu_class_omap3(mpu) ? 0x50 : 0x20;
omap_gpmc_reset(s);
/* We have to register a different IO memory handler for each
* chip select region in case a NAND device is mapped there. We
* make the region the worst-case size of 256MB and rely on the
* container memory region in cs_map to chop it down to the actual
* guest-requested size.
*/
for (cs = 0; cs < 8; cs++) {
memory_region_init_io(&s->cs_file[cs].nandiomem,
&omap_nand_ops,
&s->cs_file[cs],
"omap-nand",
256 * 1024 * 1024);
}
return s;
}
void omap_gpmc_attach(struct omap_gpmc_s *s, int cs, MemoryRegion *iomem)
{
struct omap_gpmc_cs_file_s *f;
assert(iomem);
if (cs < 0 || cs >= 8) {
fprintf(stderr, "%s: bad chip-select %i\n", __FUNCTION__, cs);
exit(-1);
}
f = &s->cs_file[cs];
omap_gpmc_cs_unmap(s, cs);
f->config[0] &= ~(0xf << 10);
f->iomem = iomem;
omap_gpmc_cs_map(s, cs);
}
void omap_gpmc_attach_nand(struct omap_gpmc_s *s, int cs, DeviceState *nand)
{
struct omap_gpmc_cs_file_s *f;
assert(nand);
if (cs < 0 || cs >= 8) {
fprintf(stderr, "%s: bad chip-select %i\n", __func__, cs);
exit(-1);
}
f = &s->cs_file[cs];
omap_gpmc_cs_unmap(s, cs);
f->config[0] &= ~(0xf << 10);
f->config[0] |= (OMAP_GPMC_NAND << 10);
f->dev = nand;
if (nand_getbuswidth(f->dev) == 16) {
f->config[0] |= OMAP_GPMC_16BIT << 12;
}
omap_gpmc_cs_map(s, cs);
}
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