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qemu/hw/omap_gpio.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

726 lines
18 KiB
C
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/*
* TI OMAP processors GPIO emulation.
*
* Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
* Copyright (C) 2007-2009 Nokia Corporation
*
* 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) version 3 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"
/* General-Purpose I/O */
struct omap_gpio_s {
qemu_irq irq;
qemu_irq *in;
qemu_irq handler[16];
uint16_t inputs;
uint16_t outputs;
uint16_t dir;
uint16_t edge;
uint16_t mask;
uint16_t ints;
uint16_t pins;
};
static void omap_gpio_set(void *opaque, int line, int level)
{
struct omap_gpio_s *s = (struct omap_gpio_s *) opaque;
uint16_t prev = s->inputs;
if (level)
s->inputs |= 1 << line;
else
s->inputs &= ~(1 << line);
if (((s->edge & s->inputs & ~prev) | (~s->edge & ~s->inputs & prev)) &
(1 << line) & s->dir & ~s->mask) {
s->ints |= 1 << line;
qemu_irq_raise(s->irq);
}
}
static uint32_t omap_gpio_read(void *opaque, target_phys_addr_t addr)
{
struct omap_gpio_s *s = (struct omap_gpio_s *) opaque;
int offset = addr & OMAP_MPUI_REG_MASK;
switch (offset) {
case 0x00: /* DATA_INPUT */
return s->inputs & s->pins;
case 0x04: /* DATA_OUTPUT */
return s->outputs;
case 0x08: /* DIRECTION_CONTROL */
return s->dir;
case 0x0c: /* INTERRUPT_CONTROL */
return s->edge;
case 0x10: /* INTERRUPT_MASK */
return s->mask;
case 0x14: /* INTERRUPT_STATUS */
return s->ints;
case 0x18: /* PIN_CONTROL (not in OMAP310) */
OMAP_BAD_REG(addr);
return s->pins;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_gpio_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_gpio_s *s = (struct omap_gpio_s *) opaque;
int offset = addr & OMAP_MPUI_REG_MASK;
uint16_t diff;
int ln;
switch (offset) {
case 0x00: /* DATA_INPUT */
OMAP_RO_REG(addr);
return;
case 0x04: /* DATA_OUTPUT */
diff = (s->outputs ^ value) & ~s->dir;
s->outputs = value;
while ((ln = ffs(diff))) {
ln --;
if (s->handler[ln])
qemu_set_irq(s->handler[ln], (value >> ln) & 1);
diff &= ~(1 << ln);
}
break;
case 0x08: /* DIRECTION_CONTROL */
diff = s->outputs & (s->dir ^ value);
s->dir = value;
value = s->outputs & ~s->dir;
while ((ln = ffs(diff))) {
ln --;
if (s->handler[ln])
qemu_set_irq(s->handler[ln], (value >> ln) & 1);
diff &= ~(1 << ln);
}
break;
case 0x0c: /* INTERRUPT_CONTROL */
s->edge = value;
break;
case 0x10: /* INTERRUPT_MASK */
s->mask = value;
break;
case 0x14: /* INTERRUPT_STATUS */
s->ints &= ~value;
if (!s->ints)
qemu_irq_lower(s->irq);
break;
case 0x18: /* PIN_CONTROL (not in OMAP310 TRM) */
OMAP_BAD_REG(addr);
s->pins = value;
break;
default:
OMAP_BAD_REG(addr);
return;
}
}
/* *Some* sources say the memory region is 32-bit. */
static CPUReadMemoryFunc * const omap_gpio_readfn[] = {
omap_badwidth_read16,
omap_gpio_read,
omap_badwidth_read16,
};
static CPUWriteMemoryFunc * const omap_gpio_writefn[] = {
omap_badwidth_write16,
omap_gpio_write,
omap_badwidth_write16,
};
void omap_gpio_reset(struct omap_gpio_s *s)
{
s->inputs = 0;
s->outputs = ~0;
s->dir = ~0;
s->edge = ~0;
s->mask = ~0;
s->ints = 0;
s->pins = ~0;
}
struct omap_gpio_s *omap_gpio_init(target_phys_addr_t base,
qemu_irq irq, omap_clk clk)
{
int iomemtype;
struct omap_gpio_s *s = (struct omap_gpio_s *)
qemu_mallocz(sizeof(struct omap_gpio_s));
s->irq = irq;
s->in = qemu_allocate_irqs(omap_gpio_set, s, 16);
omap_gpio_reset(s);
iomemtype = cpu_register_io_memory(omap_gpio_readfn,
omap_gpio_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, 0x1000, iomemtype);
return s;
}
qemu_irq *omap_gpio_in_get(struct omap_gpio_s *s)
{
return s->in;
}
void omap_gpio_out_set(struct omap_gpio_s *s, int line, qemu_irq handler)
{
if (line >= 16 || line < 0)
hw_error("%s: No GPIO line %i\n", __FUNCTION__, line);
s->handler[line] = handler;
}
/* General-Purpose Interface of OMAP2 */
struct omap2_gpio_s {
qemu_irq irq[2];
qemu_irq wkup;
qemu_irq *in;
qemu_irq handler[32];
uint8_t config[2];
uint32_t inputs;
uint32_t outputs;
uint32_t dir;
uint32_t level[2];
uint32_t edge[2];
uint32_t mask[2];
uint32_t wumask;
uint32_t ints[2];
uint32_t debounce;
uint8_t delay;
};
static inline void omap2_gpio_module_int_update(struct omap2_gpio_s *s,
int line)
{
qemu_set_irq(s->irq[line], s->ints[line] & s->mask[line]);
}
static void omap2_gpio_module_wake(struct omap2_gpio_s *s, int line)
{
if (!(s->config[0] & (1 << 2))) /* ENAWAKEUP */
return;
if (!(s->config[0] & (3 << 3))) /* Force Idle */
return;
if (!(s->wumask & (1 << line)))
return;
qemu_irq_raise(s->wkup);
}
static inline void omap2_gpio_module_out_update(struct omap2_gpio_s *s,
uint32_t diff)
{
int ln;
s->outputs ^= diff;
diff &= ~s->dir;
while ((ln = ffs(diff))) {
ln --;
qemu_set_irq(s->handler[ln], (s->outputs >> ln) & 1);
diff &= ~(1 << ln);
}
}
static void omap2_gpio_module_level_update(struct omap2_gpio_s *s, int line)
{
s->ints[line] |= s->dir &
((s->inputs & s->level[1]) | (~s->inputs & s->level[0]));
omap2_gpio_module_int_update(s, line);
}
static inline void omap2_gpio_module_int(struct omap2_gpio_s *s, int line)
{
s->ints[0] |= 1 << line;
omap2_gpio_module_int_update(s, 0);
s->ints[1] |= 1 << line;
omap2_gpio_module_int_update(s, 1);
omap2_gpio_module_wake(s, line);
}
static void omap2_gpio_module_set(void *opaque, int line, int level)
{
struct omap2_gpio_s *s = (struct omap2_gpio_s *) opaque;
if (level) {
if (s->dir & (1 << line) & ((~s->inputs & s->edge[0]) | s->level[1]))
omap2_gpio_module_int(s, line);
s->inputs |= 1 << line;
} else {
if (s->dir & (1 << line) & ((s->inputs & s->edge[1]) | s->level[0]))
omap2_gpio_module_int(s, line);
s->inputs &= ~(1 << line);
}
}
static void omap2_gpio_module_reset(struct omap2_gpio_s *s)
{
s->config[0] = 0;
s->config[1] = 2;
s->ints[0] = 0;
s->ints[1] = 0;
s->mask[0] = 0;
s->mask[1] = 0;
s->wumask = 0;
s->dir = ~0;
s->level[0] = 0;
s->level[1] = 0;
s->edge[0] = 0;
s->edge[1] = 0;
s->debounce = 0;
s->delay = 0;
}
static uint32_t omap2_gpio_module_read(void *opaque, target_phys_addr_t addr)
{
struct omap2_gpio_s *s = (struct omap2_gpio_s *) opaque;
switch (addr) {
case 0x00: /* GPIO_REVISION */
return 0x18;
case 0x10: /* GPIO_SYSCONFIG */
return s->config[0];
case 0x14: /* GPIO_SYSSTATUS */
return 0x01;
case 0x18: /* GPIO_IRQSTATUS1 */
return s->ints[0];
case 0x1c: /* GPIO_IRQENABLE1 */
case 0x60: /* GPIO_CLEARIRQENABLE1 */
case 0x64: /* GPIO_SETIRQENABLE1 */
return s->mask[0];
case 0x20: /* GPIO_WAKEUPENABLE */
case 0x80: /* GPIO_CLEARWKUENA */
case 0x84: /* GPIO_SETWKUENA */
return s->wumask;
case 0x28: /* GPIO_IRQSTATUS2 */
return s->ints[1];
case 0x2c: /* GPIO_IRQENABLE2 */
case 0x70: /* GPIO_CLEARIRQENABLE2 */
case 0x74: /* GPIO_SETIREQNEABLE2 */
return s->mask[1];
case 0x30: /* GPIO_CTRL */
return s->config[1];
case 0x34: /* GPIO_OE */
return s->dir;
case 0x38: /* GPIO_DATAIN */
return s->inputs;
case 0x3c: /* GPIO_DATAOUT */
case 0x90: /* GPIO_CLEARDATAOUT */
case 0x94: /* GPIO_SETDATAOUT */
return s->outputs;
case 0x40: /* GPIO_LEVELDETECT0 */
return s->level[0];
case 0x44: /* GPIO_LEVELDETECT1 */
return s->level[1];
case 0x48: /* GPIO_RISINGDETECT */
return s->edge[0];
case 0x4c: /* GPIO_FALLINGDETECT */
return s->edge[1];
case 0x50: /* GPIO_DEBOUNCENABLE */
return s->debounce;
case 0x54: /* GPIO_DEBOUNCINGTIME */
return s->delay;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap2_gpio_module_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap2_gpio_s *s = (struct omap2_gpio_s *) opaque;
uint32_t diff;
int ln;
switch (addr) {
case 0x00: /* GPIO_REVISION */
case 0x14: /* GPIO_SYSSTATUS */
case 0x38: /* GPIO_DATAIN */
OMAP_RO_REG(addr);
break;
case 0x10: /* GPIO_SYSCONFIG */
if (((value >> 3) & 3) == 3)
fprintf(stderr, "%s: bad IDLEMODE value\n", __FUNCTION__);
if (value & 2)
omap2_gpio_module_reset(s);
s->config[0] = value & 0x1d;
break;
case 0x18: /* GPIO_IRQSTATUS1 */
if (s->ints[0] & value) {
s->ints[0] &= ~value;
omap2_gpio_module_level_update(s, 0);
}
break;
case 0x1c: /* GPIO_IRQENABLE1 */
s->mask[0] = value;
omap2_gpio_module_int_update(s, 0);
break;
case 0x20: /* GPIO_WAKEUPENABLE */
s->wumask = value;
break;
case 0x28: /* GPIO_IRQSTATUS2 */
if (s->ints[1] & value) {
s->ints[1] &= ~value;
omap2_gpio_module_level_update(s, 1);
}
break;
case 0x2c: /* GPIO_IRQENABLE2 */
s->mask[1] = value;
omap2_gpio_module_int_update(s, 1);
break;
case 0x30: /* GPIO_CTRL */
s->config[1] = value & 7;
break;
case 0x34: /* GPIO_OE */
diff = s->outputs & (s->dir ^ value);
s->dir = value;
value = s->outputs & ~s->dir;
while ((ln = ffs(diff))) {
diff &= ~(1 <<-- ln);
qemu_set_irq(s->handler[ln], (value >> ln) & 1);
}
omap2_gpio_module_level_update(s, 0);
omap2_gpio_module_level_update(s, 1);
break;
case 0x3c: /* GPIO_DATAOUT */
omap2_gpio_module_out_update(s, s->outputs ^ value);
break;
case 0x40: /* GPIO_LEVELDETECT0 */
s->level[0] = value;
omap2_gpio_module_level_update(s, 0);
omap2_gpio_module_level_update(s, 1);
break;
case 0x44: /* GPIO_LEVELDETECT1 */
s->level[1] = value;
omap2_gpio_module_level_update(s, 0);
omap2_gpio_module_level_update(s, 1);
break;
case 0x48: /* GPIO_RISINGDETECT */
s->edge[0] = value;
break;
case 0x4c: /* GPIO_FALLINGDETECT */
s->edge[1] = value;
break;
case 0x50: /* GPIO_DEBOUNCENABLE */
s->debounce = value;
break;
case 0x54: /* GPIO_DEBOUNCINGTIME */
s->delay = value;
break;
case 0x60: /* GPIO_CLEARIRQENABLE1 */
s->mask[0] &= ~value;
omap2_gpio_module_int_update(s, 0);
break;
case 0x64: /* GPIO_SETIRQENABLE1 */
s->mask[0] |= value;
omap2_gpio_module_int_update(s, 0);
break;
case 0x70: /* GPIO_CLEARIRQENABLE2 */
s->mask[1] &= ~value;
omap2_gpio_module_int_update(s, 1);
break;
case 0x74: /* GPIO_SETIREQNEABLE2 */
s->mask[1] |= value;
omap2_gpio_module_int_update(s, 1);
break;
case 0x80: /* GPIO_CLEARWKUENA */
s->wumask &= ~value;
break;
case 0x84: /* GPIO_SETWKUENA */
s->wumask |= value;
break;
case 0x90: /* GPIO_CLEARDATAOUT */
omap2_gpio_module_out_update(s, s->outputs & value);
break;
case 0x94: /* GPIO_SETDATAOUT */
omap2_gpio_module_out_update(s, ~s->outputs & value);
break;
default:
OMAP_BAD_REG(addr);
return;
}
}
static uint32_t omap2_gpio_module_readp(void *opaque, target_phys_addr_t addr)
{
return omap2_gpio_module_readp(opaque, addr) >> ((addr & 3) << 3);
}
static void omap2_gpio_module_writep(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
uint32_t cur = 0;
uint32_t mask = 0xffff;
switch (addr & ~3) {
case 0x00: /* GPIO_REVISION */
case 0x14: /* GPIO_SYSSTATUS */
case 0x38: /* GPIO_DATAIN */
OMAP_RO_REG(addr);
break;
case 0x10: /* GPIO_SYSCONFIG */
case 0x1c: /* GPIO_IRQENABLE1 */
case 0x20: /* GPIO_WAKEUPENABLE */
case 0x2c: /* GPIO_IRQENABLE2 */
case 0x30: /* GPIO_CTRL */
case 0x34: /* GPIO_OE */
case 0x3c: /* GPIO_DATAOUT */
case 0x40: /* GPIO_LEVELDETECT0 */
case 0x44: /* GPIO_LEVELDETECT1 */
case 0x48: /* GPIO_RISINGDETECT */
case 0x4c: /* GPIO_FALLINGDETECT */
case 0x50: /* GPIO_DEBOUNCENABLE */
case 0x54: /* GPIO_DEBOUNCINGTIME */
cur = omap2_gpio_module_read(opaque, addr & ~3) &
~(mask << ((addr & 3) << 3));
/* Fall through. */
case 0x18: /* GPIO_IRQSTATUS1 */
case 0x28: /* GPIO_IRQSTATUS2 */
case 0x60: /* GPIO_CLEARIRQENABLE1 */
case 0x64: /* GPIO_SETIRQENABLE1 */
case 0x70: /* GPIO_CLEARIRQENABLE2 */
case 0x74: /* GPIO_SETIREQNEABLE2 */
case 0x80: /* GPIO_CLEARWKUENA */
case 0x84: /* GPIO_SETWKUENA */
case 0x90: /* GPIO_CLEARDATAOUT */
case 0x94: /* GPIO_SETDATAOUT */
value <<= (addr & 3) << 3;
omap2_gpio_module_write(opaque, addr, cur | value);
break;
default:
OMAP_BAD_REG(addr);
return;
}
}
static CPUReadMemoryFunc * const omap2_gpio_module_readfn[] = {
omap2_gpio_module_readp,
omap2_gpio_module_readp,
omap2_gpio_module_read,
};
static CPUWriteMemoryFunc * const omap2_gpio_module_writefn[] = {
omap2_gpio_module_writep,
omap2_gpio_module_writep,
omap2_gpio_module_write,
};
static void omap2_gpio_module_init(struct omap2_gpio_s *s,
struct omap_target_agent_s *ta, int region,
qemu_irq mpu, qemu_irq dsp, qemu_irq wkup,
omap_clk fclk, omap_clk iclk)
{
int iomemtype;
s->irq[0] = mpu;
s->irq[1] = dsp;
s->wkup = wkup;
s->in = qemu_allocate_irqs(omap2_gpio_module_set, s, 32);
iomemtype = l4_register_io_memory(omap2_gpio_module_readfn,
omap2_gpio_module_writefn, s);
omap_l4_attach(ta, region, iomemtype);
}
struct omap_gpif_s {
struct omap2_gpio_s module[5];
int modules;
int autoidle;
int gpo;
};
void omap_gpif_reset(struct omap_gpif_s *s)
{
int i;
for (i = 0; i < s->modules; i ++)
omap2_gpio_module_reset(s->module + i);
s->autoidle = 0;
s->gpo = 0;
}
static uint32_t omap_gpif_top_read(void *opaque, target_phys_addr_t addr)
{
struct omap_gpif_s *s = (struct omap_gpif_s *) opaque;
switch (addr) {
case 0x00: /* IPGENERICOCPSPL_REVISION */
return 0x18;
case 0x10: /* IPGENERICOCPSPL_SYSCONFIG */
return s->autoidle;
case 0x14: /* IPGENERICOCPSPL_SYSSTATUS */
return 0x01;
case 0x18: /* IPGENERICOCPSPL_IRQSTATUS */
return 0x00;
case 0x40: /* IPGENERICOCPSPL_GPO */
return s->gpo;
case 0x50: /* IPGENERICOCPSPL_GPI */
return 0x00;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_gpif_top_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_gpif_s *s = (struct omap_gpif_s *) opaque;
switch (addr) {
case 0x00: /* IPGENERICOCPSPL_REVISION */
case 0x14: /* IPGENERICOCPSPL_SYSSTATUS */
case 0x18: /* IPGENERICOCPSPL_IRQSTATUS */
case 0x50: /* IPGENERICOCPSPL_GPI */
OMAP_RO_REG(addr);
break;
case 0x10: /* IPGENERICOCPSPL_SYSCONFIG */
if (value & (1 << 1)) /* SOFTRESET */
omap_gpif_reset(s);
s->autoidle = value & 1;
break;
case 0x40: /* IPGENERICOCPSPL_GPO */
s->gpo = value & 1;
break;
default:
OMAP_BAD_REG(addr);
return;
}
}
static CPUReadMemoryFunc * const omap_gpif_top_readfn[] = {
omap_gpif_top_read,
omap_gpif_top_read,
omap_gpif_top_read,
};
static CPUWriteMemoryFunc * const omap_gpif_top_writefn[] = {
omap_gpif_top_write,
omap_gpif_top_write,
omap_gpif_top_write,
};
struct omap_gpif_s *omap2_gpio_init(struct omap_target_agent_s *ta,
qemu_irq *irq, omap_clk *fclk, omap_clk iclk, int modules)
{
int iomemtype, i;
struct omap_gpif_s *s = (struct omap_gpif_s *)
qemu_mallocz(sizeof(struct omap_gpif_s));
int region[4] = { 0, 2, 4, 5 };
s->modules = modules;
for (i = 0; i < modules; i ++)
omap2_gpio_module_init(s->module + i, ta, region[i],
irq[i], NULL, NULL, fclk[i], iclk);
omap_gpif_reset(s);
iomemtype = l4_register_io_memory(omap_gpif_top_readfn,
omap_gpif_top_writefn, s);
omap_l4_attach(ta, 1, iomemtype);
return s;
}
qemu_irq *omap2_gpio_in_get(struct omap_gpif_s *s, int start)
{
if (start >= s->modules * 32 || start < 0)
hw_error("%s: No GPIO line %i\n", __FUNCTION__, start);
return s->module[start >> 5].in + (start & 31);
}
void omap2_gpio_out_set(struct omap_gpif_s *s, int line, qemu_irq handler)
{
if (line >= s->modules * 32 || line < 0)
hw_error("%s: No GPIO line %i\n", __FUNCTION__, line);
s->module[line >> 5].handler[line & 31] = handler;
}
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