diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-stmp378x/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-stmp378x/Makefile.boot | 3 | ||||
| -rw-r--r-- | arch/arm/mach-stmp378x/stmp378x.c | 225 | ||||
| -rw-r--r-- | arch/arm/mach-stmp378x/stmp378x.h | 24 | ||||
| -rw-r--r-- | arch/arm/mach-stmp378x/stmp378x_devb.c | 80 |
5 files changed, 334 insertions, 0 deletions
diff --git a/arch/arm/mach-stmp378x/Makefile b/arch/arm/mach-stmp378x/Makefile new file mode 100644 index 0000000..d156f76 --- /dev/null +++ b/arch/arm/mach-stmp378x/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_ARCH_STMP378X) += stmp378x.o +obj-$(CONFIG_MACH_STMP378X) += stmp378x_devb.o diff --git a/arch/arm/mach-stmp378x/Makefile.boot b/arch/arm/mach-stmp378x/Makefile.boot new file mode 100644 index 0000000..1568ad4 --- /dev/null +++ b/arch/arm/mach-stmp378x/Makefile.boot @@ -0,0 +1,3 @@ + zreladdr-y := 0x40008000 +params_phys-y := 0x40000100 +initrd_phys-y := 0x40800000 diff --git a/arch/arm/mach-stmp378x/stmp378x.c b/arch/arm/mach-stmp378x/stmp378x.c new file mode 100644 index 0000000..f156ec7 --- /dev/null +++ b/arch/arm/mach-stmp378x/stmp378x.c @@ -0,0 +1,225 @@ +/* + * 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)); +} diff --git a/arch/arm/mach-stmp378x/stmp378x.h b/arch/arm/mach-stmp378x/stmp378x.h new file mode 100644 index 0000000..473de64 --- /dev/null +++ b/arch/arm/mach-stmp378x/stmp378x.h @@ -0,0 +1,24 @@ +/* + * 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 */ diff --git a/arch/arm/mach-stmp378x/stmp378x_devb.c b/arch/arm/mach-stmp378x/stmp378x_devb.c new file mode 100644 index 0000000..bc643f6 --- /dev/null +++ b/arch/arm/mach-stmp378x/stmp378x_devb.c @@ -0,0 +1,80 @@ +/* + * 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 |
