diff options
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mach-stmp37xx/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/mach-stmp37xx/Makefile.boot | 3 | ||||
-rw-r--r-- | arch/arm/mach-stmp37xx/stmp37xx.c | 217 | ||||
-rw-r--r-- | arch/arm/mach-stmp37xx/stmp37xx.h | 24 | ||||
-rw-r--r-- | arch/arm/mach-stmp37xx/stmp37xx_devb.c | 83 |
5 files changed, 329 insertions, 0 deletions
diff --git a/arch/arm/mach-stmp37xx/Makefile b/arch/arm/mach-stmp37xx/Makefile new file mode 100644 index 000000000000..57deffd09fbf --- /dev/null +++ b/arch/arm/mach-stmp37xx/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_ARCH_STMP37XX) += stmp37xx.o +obj-$(CONFIG_MACH_STMP37XX) += stmp37xx_devb.o diff --git a/arch/arm/mach-stmp37xx/Makefile.boot b/arch/arm/mach-stmp37xx/Makefile.boot new file mode 100644 index 000000000000..1568ad404d59 --- /dev/null +++ b/arch/arm/mach-stmp37xx/Makefile.boot @@ -0,0 +1,3 @@ + zreladdr-y := 0x40008000 +params_phys-y := 0x40000100 +initrd_phys-y := 0x40800000 diff --git a/arch/arm/mach-stmp37xx/stmp37xx.c b/arch/arm/mach-stmp37xx/stmp37xx.c new file mode 100644 index 000000000000..83a41c90c252 --- /dev/null +++ b/arch/arm/mach-stmp37xx/stmp37xx.c @@ -0,0 +1,217 @@ +/* + * Freescale STMP37XX 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/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/irq.h> +#include <linux/io.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/stmp3xxx.h> +#include <mach/dma.h> + +#include <mach/regs-icoll.h> +#include <mach/regs-apbh.h> +#include <mach/regs-apbx.h> +#include "stmp37xx.h" + +/* + * IRQ handling + */ +static void stmp37xx_ack_irq(unsigned int irq) +{ + /* Disable IRQ */ + HW_ICOLL_PRIORITYn_CLR(irq / 4, 0x04 << ((irq % 4) * 8)); + + /* ACK current interrupt */ + HW_ICOLL_LEVELACK_WR(1); + + /* Barrier */ + (void) HW_ICOLL_STAT_RD(); +} + +static void stmp37xx_mask_irq(unsigned int irq) +{ + /* IRQ disable */ + HW_ICOLL_PRIORITYn_CLR(irq / 4, 0x04 << ((irq % 4) * 8)); +} + +static void stmp37xx_unmask_irq(unsigned int irq) +{ + /* IRQ enable */ + HW_ICOLL_PRIORITYn_SET(irq / 4, 0x04 << ((irq % 4) * 8)); +} + +static struct irq_chip stmp37xx_chip = { + .ack = stmp37xx_ack_irq, + .mask = stmp37xx_mask_irq, + .unmask = stmp37xx_unmask_irq, +}; + +void __init stmp37xx_init_irq(void) +{ + stmp3xxx_init_irq(&stmp37xx_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 << (8 + (channel % 16))); + break; + + case STMP3XXX_BUS_APBX: + HW_APBX_CTRL1_SET(1 << (8 + (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)); + break; + + case STMP3XXX_BUS_APBX: + HW_APBX_CTRL1_CLR(1 << (channel % 16)); + break; + } +} +EXPORT_SYMBOL(stmp3xxx_arch_dma_clear_interrupt); + +int stmp3xxx_arch_dma_is_interrupt(int channel) +{ + int r = 0; + + int dmabus = channel / 16; + + 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_CTRL0_SET(chbit << BP_APBX_CTRL0_RESET_CHANNEL); + while (HW_APBX_CTRL0_RD() & + (chbit << BP_APBX_CTRL0_RESET_CHANNEL)) + 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_CTRL0_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_CTRL0_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 stmp37xx_io_desc[] __initdata = { + { + .virtual = (u32)STMP3XXX_REGS_BASE, + .pfn = __phys_to_pfn(STMP3XXX_REGS_PHBASE), + .length = SZ_1M, + .type = MT_DEVICE + }, + { + .virtual = (u32)STMP3XXX_OCRAM_BASE, + .pfn = __phys_to_pfn(STMP3XXX_OCRAM_PHBASE), + .length = STMP3XXX_OCRAM_SIZE, + .type = MT_DEVICE, + }, +}; + +void __init stmp37xx_map_io(void) +{ + iotable_init(stmp37xx_io_desc, ARRAY_SIZE(stmp37xx_io_desc)); +} diff --git a/arch/arm/mach-stmp37xx/stmp37xx.h b/arch/arm/mach-stmp37xx/stmp37xx.h new file mode 100644 index 000000000000..0b75fb796a64 --- /dev/null +++ b/arch/arm/mach-stmp37xx/stmp37xx.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_STMP37XX_H +#define __MACH_STMP37XX_H + +void stmp37xx_map_io(void); +void stmp37xx_init_irq(void); + +#endif /* __MACH_STMP37XX_H */ diff --git a/arch/arm/mach-stmp37xx/stmp37xx_devb.c b/arch/arm/mach-stmp37xx/stmp37xx_devb.c new file mode 100644 index 000000000000..adfbdc7f8e27 --- /dev/null +++ b/arch/arm/mach-stmp37xx/stmp37xx_devb.c @@ -0,0 +1,83 @@ +/* + * Freescale STMP37XX 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/device.h> +#include <linux/platform_device.h> +#include <asm/setup.h> +#include <asm/mach-types.h> +#include <asm/mach/arch.h> + +#include <mach/stmp3xxx.h> +#include <mach/pins.h> +#include <mach/pinmux.h> +#include "stmp37xx.h" + +/* + * List of STMP37xx development board specific devices + */ +static struct platform_device *stmp37xx_devb_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 stmp37xx_devb_init(void) +{ + stmp3xxx_pinmux_init(NR_REAL_IRQS); + + /* Init STMP3xxx platform */ + stmp3xxx_init(); + + stmp3xxx_dbguart.dev.platform_data = dbguart_pins_control; + /* Add STMP37xx development board devices */ + platform_add_devices(stmp37xx_devb_devices, + ARRAY_SIZE(stmp37xx_devb_devices)); +} + +MACHINE_START(STMP37XX, "STMP37XX") + .phys_io = 0x80000000, + .io_pg_offst = ((0xf0000000) >> 18) & 0xfffc, + .boot_params = 0x40000100, + .map_io = stmp37xx_map_io, + .init_irq = stmp37xx_init_irq, + .timer = &stmp3xxx_timer, + .init_machine = stmp37xx_devb_init, +MACHINE_END |