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yaml
---
r: 149384
b: refs/heads/master
c: bc19d89
h: refs/heads/master
v: v3
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dmitry pervushin authored and Russell King committed Apr 27, 2009
1 parent 9e6facf commit 3bbffe3
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Showing 6 changed files with 335 additions and 1 deletion.
2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: 45d9108011b9dfb4fccd6c258290d2185145709b
refs/heads/master: bc19d892a14cbb31d838813b2225e262a6c01341
2 changes: 2 additions & 0 deletions trunk/arch/arm/mach-stmp378x/Makefile
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obj-$(CONFIG_ARCH_STMP378X) += stmp378x.o
obj-$(CONFIG_MACH_STMP378X) += stmp378x_devb.o
3 changes: 3 additions & 0 deletions trunk/arch/arm/mach-stmp378x/Makefile.boot
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zreladdr-y := 0x40008000
params_phys-y := 0x40000100
initrd_phys-y := 0x40800000
225 changes: 225 additions & 0 deletions trunk/arch/arm/mach-stmp378x/stmp378x.c
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/*
* Freescale STMP378X platform support
*
* Embedded Alley Solutions, Inc <source@embeddedalley.com>
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/

/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/irq.h>

#include <asm/dma.h>
#include <asm/setup.h>
#include <asm/mach-types.h>

#include <asm/mach/arch.h>
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>

#include <mach/pins.h>
#include <mach/pinmux.h>
#include <mach/dma.h>
#include <mach/hardware.h>
#include <mach/system.h>
#include <mach/platform.h>
#include <mach/stmp3xxx.h>
#include <mach/regs-icoll.h>
#include <mach/regs-apbh.h>
#include <mach/regs-apbx.h>

#include "stmp378x.h"
/*
* IRQ handling
*/
static void stmp378x_ack_irq(unsigned int irq)
{
/* Tell ICOLL to release IRQ line */
HW_ICOLL_VECTOR_WR(0x0);

/* ACK current interrupt */
HW_ICOLL_LEVELACK_WR(BV_ICOLL_LEVELACK_IRQLEVELACK__LEVEL0);

/* Barrier */
(void) HW_ICOLL_STAT_RD();
}

static void stmp378x_mask_irq(unsigned int irq)
{
/* IRQ disable */
HW_ICOLL_INTERRUPTn_CLR(irq, BM_ICOLL_INTERRUPTn_ENABLE);
}

static void stmp378x_unmask_irq(unsigned int irq)
{
/* IRQ enable */
HW_ICOLL_INTERRUPTn_SET(irq, BM_ICOLL_INTERRUPTn_ENABLE);
}

static struct irq_chip stmp378x_chip = {
.ack = stmp378x_ack_irq,
.mask = stmp378x_mask_irq,
.unmask = stmp378x_unmask_irq,
};

void __init stmp378x_init_irq(void)
{
stmp3xxx_init_irq(&stmp378x_chip);
}

/*
* DMA interrupt handling
*/
void stmp3xxx_arch_dma_enable_interrupt(int channel)
{
int dmabus = channel / 16;

switch (dmabus) {
case STMP3XXX_BUS_APBH:
HW_APBH_CTRL1_SET(1 << (16 + (channel % 16)));
HW_APBH_CTRL2_SET(1 << (16 + (channel % 16)));
break;

case STMP3XXX_BUS_APBX:
HW_APBX_CTRL1_SET(1 << (16 + (channel % 16)));
HW_APBX_CTRL2_SET(1 << (16 + (channel % 16)));
break;
}
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_enable_interrupt);

void stmp3xxx_arch_dma_clear_interrupt(int channel)
{
int dmabus = channel / 16;

switch (dmabus) {
case STMP3XXX_BUS_APBH:
HW_APBH_CTRL1_CLR(1 << (channel % 16));
HW_APBH_CTRL2_CLR(1 << (channel % 16));
break;

case STMP3XXX_BUS_APBX:
HW_APBX_CTRL1_CLR(1 << (channel % 16));
HW_APBX_CTRL2_CLR(1 << (channel % 16));
break;
}
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_clear_interrupt);

int stmp3xxx_arch_dma_is_interrupt(int channel)
{
int dmabus = channel / 16;
int r = 0;

switch (dmabus) {
case STMP3XXX_BUS_APBH:
r = HW_APBH_CTRL1_RD() & (1 << (channel % 16));
break;

case STMP3XXX_BUS_APBX:
r = HW_APBX_CTRL1_RD() & (1 << (channel % 16));
break;
}
return r;
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_is_interrupt);

void stmp3xxx_arch_dma_reset_channel(int channel)
{
int dmabus = channel / 16;
unsigned chbit = 1 << (channel % 16);

switch (dmabus) {
case STMP3XXX_BUS_APBH:
/* Reset channel and wait for it to complete */
HW_APBH_CTRL0_SET(chbit <<
BP_APBH_CTRL0_RESET_CHANNEL);
while (HW_APBH_CTRL0_RD() &
(chbit << BP_APBH_CTRL0_RESET_CHANNEL))
continue;
break;

case STMP3XXX_BUS_APBX:
/* Reset channel and wait for it to complete */
HW_APBX_CHANNEL_CTRL_SET(
BF_APBX_CHANNEL_CTRL_RESET_CHANNEL(chbit));
while (HW_APBX_CHANNEL_CTRL_RD() &
BF_APBX_CHANNEL_CTRL_RESET_CHANNEL(chbit))
continue;
break;
}
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_reset_channel);

void stmp3xxx_arch_dma_freeze(int channel)
{
int dmabus = channel / 16;
unsigned chbit = 1 << (channel % 16);

switch (dmabus) {
case STMP3XXX_BUS_APBH:
HW_APBH_CTRL0_SET(1<<chbit);
break;
case STMP3XXX_BUS_APBX:
HW_APBX_CHANNEL_CTRL_SET(1<<chbit);
break;
}
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_freeze);

void stmp3xxx_arch_dma_unfreeze(int channel)
{
int dmabus = channel / 16;
unsigned chbit = 1 << (channel % 16);

switch (dmabus) {
case STMP3XXX_BUS_APBH:
HW_APBH_CTRL0_CLR(1<<chbit);
break;
case STMP3XXX_BUS_APBX:
HW_APBX_CHANNEL_CTRL_CLR(1<<chbit);
break;
}
}
EXPORT_SYMBOL(stmp3xxx_arch_dma_unfreeze);

/*
* The registers are all very closely mapped, so we might as well map them all
* with a single mapping
*
* Logical Physical
* f0000000 80000000 On-chip registers
* f1000000 00000000 256k on-chip SRAM
*/

static struct map_desc stmp378x_io_desc[] __initdata = {
{
.virtual = (u32)STMP3XXX_REGS_BASE,
.pfn = __phys_to_pfn(STMP3XXX_REGS_PHBASE),
.length = STMP3XXX_REGS_SIZE,
.type = MT_DEVICE,
},
{
.virtual = (u32)STMP3XXX_OCRAM_BASE,
.pfn = __phys_to_pfn(STMP3XXX_OCRAM_PHBASE),
.length = STMP3XXX_OCRAM_SIZE,
.type = MT_DEVICE,
},
};

void __init stmp378x_map_io(void)
{
iotable_init(stmp378x_io_desc, ARRAY_SIZE(stmp378x_io_desc));
}
24 changes: 24 additions & 0 deletions trunk/arch/arm/mach-stmp378x/stmp378x.h
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/*
* Freescale STMP37XX/STMP378X internal functions and data declarations
*
* Embedded Alley Solutions, Inc <source@embeddedalley.com>
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/

/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#ifndef __MACH_STMP378X_H
#define __MACH_STMP378X_H

void stmp378x_map_io(void);
void stmp378x_init_irq(void);

#endif /* __MACH_STMP378X_COMMON_H */
80 changes: 80 additions & 0 deletions trunk/arch/arm/mach-stmp378x/stmp378x_devb.c
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/*
* Freescale STMP378X development board support
*
* Embedded Alley Solutions, Inc <source@embeddedalley.com>
*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/

/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>

#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/pins.h>
#include <mach/pinmux.h>
#include <mach/stmp3xxx.h>

#include "stmp378x.h"

static struct platform_device *devices[] = {
&stmp3xxx_dbguart,
};

static struct pin_desc dbguart_pins_0[] = {
{ PINID_PWM0, PIN_FUN3, },
{ PINID_PWM1, PIN_FUN3, },
};

static struct pin_group dbguart_pins[] = {
[0] = {
.pins = dbguart_pins_0,
.nr_pins = ARRAY_SIZE(dbguart_pins_0),
},
};

static int dbguart_pins_control(int id, int request)
{
int r = 0;

if (request)
r = stmp3xxx_request_pin_group(&dbguart_pins[id], "debug uart");
else
stmp3xxx_release_pin_group(&dbguart_pins[id], "debug uart");
return r;
}

static void __init stmp378x_devb_init(void)
{
stmp3xxx_pinmux_init(NR_REAL_IRQS);

/* init stmp3xxx platform */
stmp3xxx_init();

stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control;

/* add board's devices */
platform_add_devices(devices, ARRAY_SIZE(devices));
}

MACHINE_START(STMP378X, "STMP378X")
.phys_io = 0x80000000,
.io_pg_offst = ((0xf0000000) >> 18) & 0xfffc,
.boot_params = 0x40000100,
.map_io = stmp378x_map_io,
.init_irq = stmp378x_init_irq,
.timer = &stmp3xxx_timer,
.init_machine = stmp378x_devb_init,
MACHINE_END

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