diff options
Diffstat (limited to 'arch/arm')
27 files changed, 1270 insertions, 115 deletions
diff --git a/arch/arm/mach-imx/include/mach/irqs.h b/arch/arm/mach-imx/include/mach/irqs.h index eb8d5bd05d5..67812c5ac1f 100644 --- a/arch/arm/mach-imx/include/mach/irqs.h +++ b/arch/arm/mach-imx/include/mach/irqs.h @@ -111,6 +111,11 @@ /* decode irq number to use with IMR(x), ISR(x) and friends */ #define IRQ_TO_REG(irq) ((irq - IMX_IRQS) >> 5) +/* all normal IRQs can be FIQs */ +#define FIQ_START 0 +/* switch betwean IRQ and FIQ */ +extern int imx_set_irq_fiq(unsigned int irq, unsigned int type); + #define NR_IRQS (IRQ_GPIOD(32) + 1) #define IRQ_GPIO(x) #endif diff --git a/arch/arm/mach-imx/irq.c b/arch/arm/mach-imx/irq.c index 232e3b9f880..531b95deadc 100644 --- a/arch/arm/mach-imx/irq.c +++ b/arch/arm/mach-imx/irq.c @@ -36,10 +36,7 @@ /* * * We simply use the ENABLE DISABLE registers inside of the IMX - * to turn on/off specific interrupts. FIXME- We should - * also add support for the accelerated interrupt controller - * by putting offets to irq jump code in the appropriate - * places. + * to turn on/off specific interrupts. * */ @@ -102,6 +99,28 @@ imx_unmask_irq(unsigned int irq) __raw_writel(irq, IMX_AITC_INTENNUM); } +#ifdef CONFIG_FIQ +int imx_set_irq_fiq(unsigned int irq, unsigned int type) +{ + unsigned int irqt; + + if (irq >= IMX_IRQS) + return -EINVAL; + + if (irq < IMX_IRQS / 2) { + irqt = __raw_readl(IMX_AITC_INTTYPEL) & ~(1 << irq); + __raw_writel(irqt | (!!type << irq), IMX_AITC_INTTYPEL); + } else { + irq -= IMX_IRQS / 2; + irqt = __raw_readl(IMX_AITC_INTTYPEH) & ~(1 << irq); + __raw_writel(irqt | (!!type << irq), IMX_AITC_INTTYPEH); + } + + return 0; +} +EXPORT_SYMBOL(imx_set_irq_fiq); +#endif /* CONFIG_FIQ */ + static int imx_gpio_irq_type(unsigned int _irq, unsigned int type) { @@ -284,4 +303,9 @@ imx_init_irq(void) /* Release masking of interrupts according to priority */ __raw_writel(-1, IMX_AITC_NIMASK); + +#ifdef CONFIG_FIQ + /* Initialize FIQ */ + init_FIQ(); +#endif } diff --git a/arch/arm/mach-mx2/devices.h b/arch/arm/mach-mx2/devices.h new file mode 100644 index 00000000000..c77a4b8f73b --- /dev/null +++ b/arch/arm/mach-mx2/devices.h @@ -0,0 +1,15 @@ + +extern struct platform_device mxc_gpt1; +extern struct platform_device mxc_gpt2; +extern struct platform_device mxc_gpt3; +extern struct platform_device mxc_gpt4; +extern struct platform_device mxc_gpt5; +extern struct platform_device mxc_wdt; +extern struct platform_device mxc_irda_device; +extern struct platform_device mxc_uart_device0; +extern struct platform_device mxc_uart_device1; +extern struct platform_device mxc_uart_device2; +extern struct platform_device mxc_uart_device3; +extern struct platform_device mxc_uart_device4; +extern struct platform_device mxc_uart_device5; + diff --git a/arch/arm/mach-mx2/mx27ads.c b/arch/arm/mach-mx2/mx27ads.c index 4ce56ef4d8d..56e22d3ca07 100644 --- a/arch/arm/mach-mx2/mx27ads.c +++ b/arch/arm/mach-mx2/mx27ads.c @@ -34,6 +34,8 @@ #include <mach/iomux-mx1-mx2.h> #include <mach/board-mx27ads.h> +#include "devices.h" + /* ADS's NOR flash */ static struct physmap_flash_data mx27ads_flash_data = { .width = 2, @@ -251,12 +253,14 @@ static struct imxuart_platform_data uart_pdata[] = { static void __init mx27ads_board_init(void) { - int i; - gpio_fec_active(); - for (i = 0; i < 6; i++) - imx_init_uart(i, &uart_pdata[i]); + mxc_register_device(&mxc_uart_device0, &uart_pdata[0]); + mxc_register_device(&mxc_uart_device1, &uart_pdata[1]); + mxc_register_device(&mxc_uart_device2, &uart_pdata[2]); + mxc_register_device(&mxc_uart_device3, &uart_pdata[3]); + mxc_register_device(&mxc_uart_device4, &uart_pdata[4]); + mxc_register_device(&mxc_uart_device5, &uart_pdata[5]); platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices)); } diff --git a/arch/arm/mach-mx2/pcm038.c b/arch/arm/mach-mx2/pcm038.c index 1028f453cfc..7f55746e259 100644 --- a/arch/arm/mach-mx2/pcm038.c +++ b/arch/arm/mach-mx2/pcm038.c @@ -28,6 +28,8 @@ #include <mach/imx-uart.h> #include <mach/board-pcm038.h> +#include "devices.h" + /* * Phytec's phyCORE-i.MX27 comes with 32MiB flash, * 16 bit width @@ -170,11 +172,11 @@ static struct platform_device *platform_devices[] __initdata = { static void __init pcm038_init(void) { - int i; gpio_fec_active(); - for (i = 0; i < 3; i++) - imx_init_uart(i, &uart_pdata[i]); + mxc_register_device(&mxc_uart_device0, &uart_pdata[0]); + mxc_register_device(&mxc_uart_device1, &uart_pdata[1]); + mxc_register_device(&mxc_uart_device2, &uart_pdata[2]); platform_add_devices(platform_devices, ARRAY_SIZE(platform_devices)); diff --git a/arch/arm/mach-mx2/serial.c b/arch/arm/mach-mx2/serial.c index e31fd44f794..16debc296da 100644 --- a/arch/arm/mach-mx2/serial.c +++ b/arch/arm/mach-mx2/serial.c @@ -35,7 +35,7 @@ static struct resource uart0[] = { }, }; -static struct platform_device mxc_uart_device0 = { +struct platform_device mxc_uart_device0 = { .name = "imx-uart", .id = 0, .resource = uart0, @@ -54,7 +54,7 @@ static struct resource uart1[] = { }, }; -static struct platform_device mxc_uart_device1 = { +struct platform_device mxc_uart_device1 = { .name = "imx-uart", .id = 1, .resource = uart1, @@ -73,7 +73,7 @@ static struct resource uart2[] = { }, }; -static struct platform_device mxc_uart_device2 = { +struct platform_device mxc_uart_device2 = { .name = "imx-uart", .id = 2, .resource = uart2, @@ -92,7 +92,7 @@ static struct resource uart3[] = { }, }; -static struct platform_device mxc_uart_device3 = { +struct platform_device mxc_uart_device3 = { .name = "imx-uart", .id = 3, .resource = uart3, @@ -111,7 +111,7 @@ static struct resource uart4[] = { }, }; -static struct platform_device mxc_uart_device4 = { +struct platform_device mxc_uart_device4 = { .name = "imx-uart", .id = 4, .resource = uart4, @@ -130,48 +130,9 @@ static struct resource uart5[] = { }, }; -static struct platform_device mxc_uart_device5 = { +struct platform_device mxc_uart_device5 = { .name = "imx-uart", .id = 5, .resource = uart5, .num_resources = ARRAY_SIZE(uart5), }; - -/* - * Register only those UARTs that physically exists - */ -int __init imx_init_uart(int uart_no, struct imxuart_platform_data *pdata) -{ - switch (uart_no) { - case 0: - mxc_uart_device0.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device0); - break; - case 1: - mxc_uart_device1.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device1); - break; -#ifndef CONFIG_MXC_IRDA - case 2: - mxc_uart_device2.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device2); - break; -#endif - case 3: - mxc_uart_device3.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device3); - break; - case 4: - mxc_uart_device4.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device4); - break; - case 5: - mxc_uart_device5.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device5); - break; - default: - return -ENODEV; - } - - return 0; -} diff --git a/arch/arm/mach-mx3/devices.c b/arch/arm/mach-mx3/devices.c index e08c6a8ac56..a6bdcc07f3c 100644 --- a/arch/arm/mach-mx3/devices.c +++ b/arch/arm/mach-mx3/devices.c @@ -36,7 +36,7 @@ static struct resource uart0[] = { }, }; -static struct platform_device mxc_uart_device0 = { +struct platform_device mxc_uart_device0 = { .name = "imx-uart", .id = 0, .resource = uart0, @@ -55,7 +55,7 @@ static struct resource uart1[] = { }, }; -static struct platform_device mxc_uart_device1 = { +struct platform_device mxc_uart_device1 = { .name = "imx-uart", .id = 1, .resource = uart1, @@ -74,7 +74,7 @@ static struct resource uart2[] = { }, }; -static struct platform_device mxc_uart_device2 = { +struct platform_device mxc_uart_device2 = { .name = "imx-uart", .id = 2, .resource = uart2, @@ -93,7 +93,7 @@ static struct resource uart3[] = { }, }; -static struct platform_device mxc_uart_device3 = { +struct platform_device mxc_uart_device3 = { .name = "imx-uart", .id = 3, .resource = uart3, @@ -112,46 +112,13 @@ static struct resource uart4[] = { }, }; -static struct platform_device mxc_uart_device4 = { +struct platform_device mxc_uart_device4 = { .name = "imx-uart", .id = 4, .resource = uart4, .num_resources = ARRAY_SIZE(uart4), }; -/* - * Register only those UARTs that physically exist - */ -int __init imx_init_uart(int uart_no, struct imxuart_platform_data *pdata) -{ - switch (uart_no) { - case 0: - mxc_uart_device0.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device0); - break; - case 1: - mxc_uart_device1.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device1); - break; - case 2: - mxc_uart_device2.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device2); - break; - case 3: - mxc_uart_device3.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device3); - break; - case 4: - mxc_uart_device4.dev.platform_data = pdata; - platform_device_register(&mxc_uart_device4); - break; - default: - return -ENODEV; - } - - return 0; -} - /* GPIO port description */ static struct mxc_gpio_port imx_gpio_ports[] = { [0] = { diff --git a/arch/arm/mach-mx3/devices.h b/arch/arm/mach-mx3/devices.h new file mode 100644 index 00000000000..4dc03f9e600 --- /dev/null +++ b/arch/arm/mach-mx3/devices.h @@ -0,0 +1,6 @@ + +extern struct platform_device mxc_uart_device0; +extern struct platform_device mxc_uart_device1; +extern struct platform_device mxc_uart_device2; +extern struct platform_device mxc_uart_device3; +extern struct platform_device mxc_uart_device4; diff --git a/arch/arm/mach-mx3/iomux.c b/arch/arm/mach-mx3/iomux.c index 3dda1fe23cb..6e664be8cc1 100644 --- a/arch/arm/mach-mx3/iomux.c +++ b/arch/arm/mach-mx3/iomux.c @@ -43,7 +43,8 @@ static DEFINE_SPINLOCK(gpio_mux_lock); */ int mxc_iomux_mode(unsigned int pin_mode) { - u32 reg, field, l, mode, ret = 0; + u32 field, l, mode, ret = 0; + void __iomem *reg; reg = IOMUXSW_MUX_CTL + (pin_mode & IOMUX_REG_MASK); field = pin_mode & 0x3; @@ -70,7 +71,8 @@ EXPORT_SYMBOL(mxc_iomux_mode); */ void mxc_iomux_set_pad(enum iomux_pins pin, u32 config) { - u32 reg, field, l; + u32 field, l; + void __iomem *reg; reg = IOMUXSW_PAD_CTL + (pin + 2) / 3; field = (pin + 2) % 3; diff --git a/arch/arm/mach-mx3/mx31ads.c b/arch/arm/mach-mx3/mx31ads.c index 0cd90a9667c..1be4a390c63 100644 --- a/arch/arm/mach-mx3/mx31ads.c +++ b/arch/arm/mach-mx3/mx31ads.c @@ -22,6 +22,7 @@ #include <linux/init.h> #include <linux/clk.h> #include <linux/serial_8250.h> +#include <linux/irq.h> #include <mach/hardware.h> #include <asm/mach-types.h> @@ -31,6 +32,8 @@ #include <asm/mach/map.h> #include <mach/common.h> #include <mach/board-mx31ads.h> +#include <mach/imx-uart.h> +#include <mach/iomux-mx3.h> /*! * @file mx31ads.c @@ -84,6 +87,108 @@ static inline int mxc_init_extuart(void) } #endif +#if defined(CONFIG_SERIAL_IMX) || defined(CONFIG_SERIAL_IMX_MODULE) +static struct imxuart_platform_data uart_pdata = { + .flags = IMXUART_HAVE_RTSCTS, +}; + +static inline void mxc_init_imx_uart(void) +{ + mxc_iomux_mode(MX31_PIN_CTS1__CTS1); + mxc_iomux_mode(MX31_PIN_RTS1__RTS1); + mxc_iomux_mode(MX31_PIN_TXD1__TXD1); + mxc_iomux_mode(MX31_PIN_RXD1__RXD1); + + mxc_register_device(&mxc_uart_device0, &uart_pdata); +} +#else /* !SERIAL_IMX */ +static inline void mxc_init_imx_uart(void) +{ +} +#endif /* !SERIAL_IMX */ + +static void mx31ads_expio_irq_handler(u32 irq, struct irq_desc *desc) +{ + u32 imr_val; + u32 int_valid; + u32 expio_irq; + + imr_val = __raw_readw(PBC_INTMASK_SET_REG); + int_valid = __raw_readw(PBC_INTSTATUS_REG) & imr_val; + + expio_irq = MXC_EXP_IO_BASE; + for (; int_valid != 0; int_valid >>= 1, expio_irq++) { + if ((int_valid & 1) == 0) + continue; + + generic_handle_irq(expio_irq); + } +} + +/* + * Disable an expio pin's interrupt by setting the bit in the imr. + * @param irq an expio virtual irq number + */ +static void expio_mask_irq(u32 irq) +{ + u32 expio = MXC_IRQ_TO_EXPIO(irq); + /* mask the interrupt */ + __raw_writew(1 << expio, PBC_INTMASK_CLEAR_REG); + __raw_readw(PBC_INTMASK_CLEAR_REG); +} + +/* + * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr. + * @param irq an expanded io virtual irq number + */ +static void expio_ack_irq(u32 irq) +{ + u32 expio = MXC_IRQ_TO_EXPIO(irq); + /* clear the interrupt status */ + __raw_writew(1 << expio, PBC_INTSTATUS_REG); +} + +/* + * Enable a expio pin's interrupt by clearing the bit in the imr. + * @param irq a expio virtual irq number + */ +static void expio_unmask_irq(u32 irq) +{ + u32 expio = MXC_IRQ_TO_EXPIO(irq); + /* unmask the interrupt */ + __raw_writew(1 << expio, PBC_INTMASK_SET_REG); +} + +static struct irq_chip expio_irq_chip = { + .ack = expio_ack_irq, + .mask = expio_mask_irq, + .unmask = expio_unmask_irq, +}; + +static void __init mx31ads_init_expio(void) +{ + int i; + + printk(KERN_INFO "MX31ADS EXPIO(CPLD) hardware\n"); + + /* + * Configure INT line as GPIO input + */ + mxc_iomux_mode(IOMUX_MODE(MX31_PIN_GPIO1_4, IOMUX_CONFIG_GPIO)); + + /* disable the interrupt and clear the status */ + __raw_writew(0xFFFF, PBC_INTMASK_CLEAR_REG); + __raw_writew(0xFFFF, PBC_INTSTATUS_REG); + for (i = MXC_EXP_IO_BASE; i < (MXC_EXP_IO_BASE + MXC_MAX_EXP_IO_LINES); + i++) { + set_irq_chip(i, &expio_irq_chip); + set_irq_handler(i, handle_level_irq); + set_irq_flags(i, IRQF_VALID); + } + set_irq_type(EXPIO_PARENT_INT, IRQ_TYPE_LEVEL_HIGH); + set_irq_chained_handler(EXPIO_PARENT_INT, mx31ads_expio_irq_handler); +} + /*! * This structure defines static mappings for the i.MX31ADS board. */ @@ -120,12 +225,19 @@ void __init mx31ads_map_io(void) iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc)); } +void __init mx31ads_init_irq(void) +{ + mxc_init_irq(); + mx31ads_init_expio(); +} + /*! * Board specific initialization. */ static void __init mxc_board_init(void) { mxc_init_extuart(); + mxc_init_imx_uart(); } static void __init mx31ads_timer_init(void) @@ -148,7 +260,7 @@ MACHINE_START(MX31ADS, "Freescale MX31ADS") .io_pg_offst = ((AIPS1_BASE_ADDR_VIRT) >> 18) & 0xfffc, .boot_params = PHYS_OFFSET + 0x100, .map_io = mx31ads_map_io, - .init_irq = mxc_init_irq, + .init_irq = mx31ads_init_irq, .init_machine = mxc_board_init, .timer = &mx31ads_timer, MACHINE_END diff --git a/arch/arm/mach-mx3/pcm037.c b/arch/arm/mach-mx3/pcm037.c index 0a152ed15a8..03374f9e000 100644 --- a/arch/arm/mach-mx3/pcm037.c +++ b/arch/arm/mach-mx3/pcm037.c @@ -33,6 +33,8 @@ #include <mach/iomux-mx3.h> #include <mach/board-pcm037.h> +#include "devices.h" + static struct physmap_flash_data pcm037_flash_data = { .width = 2, }; @@ -73,12 +75,12 @@ static void __init mxc_board_init(void) mxc_iomux_mode(MX31_PIN_TXD1__TXD1); mxc_iomux_mode(MX31_PIN_RXD1__RXD1); - imx_init_uart(0, &uart_pdata); + mxc_register_device(&mxc_uart_device0, &uart_pdata); mxc_iomux_mode(MX31_PIN_CSPI3_MOSI__RXD3); mxc_iomux_mode(MX31_PIN_CSPI3_MISO__TXD3); - imx_init_uart(2, &uart_pdata); + mxc_register_device(&mxc_uart_device2, &uart_pdata); } /* diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig index e14eaad11dd..b2a7e3fad11 100644 --- a/arch/arm/plat-mxc/Kconfig +++ b/arch/arm/plat-mxc/Kconfig @@ -23,4 +23,15 @@ source "arch/arm/mach-mx3/Kconfig" endmenu +config MXC_IRQ_PRIOR + bool "Use IRQ priority" + depends on ARCH_MXC + help + Select this if you want to use prioritized IRQ handling. + This feature prevents higher priority ISR to be interrupted + by lower priority IRQ even IRQF_DISABLED flag is not set. + This may be useful in embedded applications, where are strong + requirements for timing. + Say N here, unless you have a specialized requirement. + endif diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index db66e9ae841..067556f7c91 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -3,6 +3,6 @@ # # Common support -obj-y := irq.o clock.o gpio.o time.o +obj-y := irq.o clock.o gpio.o time.o devices.o -obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o +obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o diff --git a/arch/arm/plat-mxc/devices.c b/arch/arm/plat-mxc/devices.c new file mode 100644 index 00000000000..c66748267c4 --- /dev/null +++ b/arch/arm/plat-mxc/devices.c @@ -0,0 +1,36 @@ +/* + * Copyright 2008 Sascha Hauer, kernel@pengutronix.de + * + * 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 + * of the License, or (at your option) any later version. + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> + +int __init mxc_register_device(struct platform_device *pdev, void *data) +{ + int ret; + + pdev->dev.platform_data = data; + + ret = platform_device_register(pdev); + if (ret) + pr_debug("Unable to register platform device '%s': %d\n", + pdev->name, ret); + + return ret; +} + diff --git a/arch/arm/plat-mxc/dma-mx1-mx2.c b/arch/arm/plat-mxc/dma-mx1-mx2.c new file mode 100644 index 00000000000..b296f19fd89 --- /dev/null +++ b/arch/arm/plat-mxc/dma-mx1-mx2.c @@ -0,0 +1,840 @@ +/* + * linux/arch/arm/plat-mxc/dma-mx1-mx2.c + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa <pisa@cmp.felk.cvut.cz> + * Copyright 2008 Juergen Beisert, <kernel@pengutronix.de> + * Copyright 2008 Sascha Hauer, <s.hauer@pengutronix.de> + * + * 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 + * of the License, or (at your option) any later version. + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/clk.h> +#include <linux/scatterlist.h> +#include <linux/io.h> + +#include <asm/system.h> +#include <asm/irq.h> +#include <mach/hardware.h> +#include <asm/dma.h> +#include <mach/dma-mx1-mx2.h> + +#define DMA_DCR 0x00 /* Control Register */ +#define DMA_DISR 0x04 /* Interrupt status Register */ +#define DMA_DIMR 0x08 /* Interrupt mask Register */ +#define DMA_DBTOSR 0x0c /* Burst timeout status Register */ +#define DMA_DRTOSR 0x10 /* Request timeout Register */ +#define DMA_DSESR 0x14 /* Transfer Error Status Register */ +#define DMA_DBOSR 0x18 /* Buffer overflow status Register */ +#define DMA_DBTOCR 0x1c /* Burst timeout control Register */ +#define DMA_WSRA 0x40 /* W-Size Register A */ +#define DMA_XSRA 0x44 /* X-Size Register A */ +#define DMA_YSRA 0x48 /* Y-Size Register A */ +#define DMA_WSRB 0x4c /* W-Size Register B */ +#define DMA_XSRB 0x50 /* X-Size Register B */ +#define DMA_YSRB 0x54 /* Y-Size Register B */ +#define DMA_SAR(x) (0x80 + ((x) << 6)) /* Source Address Registers */ +#define DMA_DAR(x) (0x84 + ((x) << 6)) /* Destination Address Registers */ +#define DMA_CNTR(x) (0x88 + ((x) << 6)) /* Count Registers */ +#define DMA_CCR(x) (0x8c + ((x) << 6)) /* Control Registers */ +#define DMA_RSSR(x) (0x90 + ((x) << 6)) /* Request source select Registers */ +#define DMA_BLR(x) (0x94 + ((x) << 6)) /* Burst length Registers */ +#define DMA_RTOR(x) (0x98 + ((x) << 6)) /* Request timeout Registers */ +#define DMA_BUCR(x) (0x98 + ((x) << 6)) /* Bus Utilization Registers */ +#define DMA_CCNR(x) (0x9C + ((x) << 6)) /* Channel counter Registers */ + +#define DCR_DRST (1<<1) +#define DCR_DEN (1<<0) +#define DBTOCR_EN (1<<15) +#define DBTOCR_CNT(x) ((x) & 0x7fff) +#define CNTR_CNT(x) ((x) & 0xffffff) +#define CCR_ACRPT (1<<14) +#define CCR_DMOD_LINEAR (0x0 << 12) +#define CCR_DMOD_2D (0x1 << 12) +#define CCR_DMOD_FIFO (0x2 << 12) +#define CCR_DMOD_EOBFIFO (0x3 << 12) +#define CCR_SMOD_LINEAR (0x0 << 10) +#define CCR_SMOD_2D (0x1 << 10) +#define CCR_SMOD_FIFO (0x2 << 10) +#define CCR_SMOD_EOBFIFO (0x3 << 10) +#define CCR_MDIR_DEC (1<<9) +#define CCR_MSEL_B (1<<8) +#define CCR_DSIZ_32 (0x0 << 6) +#define CCR_DSIZ_8 (0x1 << 6) +#define CCR_DSIZ_16 (0x2 << 6) +#define CCR_SSIZ_32 (0x0 << 4) +#define CCR_SSIZ_8 (0x1 << 4) +#define CCR_SSIZ_16 (0x2 << 4) +#define CCR_REN (1<<3) +#define CCR_RPT (1<<2) +#define CCR_FRC (1<<1) +#define CCR_CEN (1<<0) +#define RTOR_EN (1<<15) +#define RTOR_CLK (1<<14) +#define RTOR_PSC (1<<13) + +/* + * struct imx_dma_channel - i.MX specific DMA extension + * @name: name specified by DMA client + * @irq_handler: client callback for end of transfer + * @err_handler: client callback for error condition + * @data: clients context data for callbacks + * @dma_mode: direction of the transfer %DMA_MODE_READ or %DMA_MODE_WRITE + * @sg: pointer to the actual read/written chunk for scatter-gather emulation + * @resbytes: total residual number of bytes to transfer + * (it can be lower or same as sum of SG mapped chunk sizes) + * @sgcount: number of chunks to be read/written + * + * Structure is used for IMX DMA processing. It would be probably good + * @struct dma_struct in the future for external interfacing and use + * @struct imx_dma_channel only as extension to it. + */ + +struct imx_dma_channel { + const char *name; + void (*irq_handler) (int, void *); + void (*err_handler) (int, void *, int errcode); + void (*prog_handler) (int, void *, struct scatterlist *); + void *data; + dmamode_t dma_mode; + struct scatterlist *sg; + unsigned int resbytes; + int dma_num; + + int in_use; + + u32 ccr_from_device; + u32 ccr_to_device; + + struct timer_list watchdog; + + int hw_chaining; +}; + +static struct imx_dma_channel imx_dma_channels[IMX_DMA_CHANNELS]; + +static struct clk *dma_clk; + +static int imx_dma_hw_chain(struct imx_dma_channel *imxdma) +{ + if (cpu_is_mx27()) + return imxdma->hw_chaining; + else + return 0; +} + + +/* + * imx_dma_sg_next - prepare next chunk for scatter-gather DMA emulation + */ +static inline int imx_dma_sg_next(int channel, struct scatterlist *sg) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long now; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return 0; + } + + now = min(imxdma->resbytes, sg->length); + imxdma->resbytes -= now; + + if ((imxdma->dma_mode & DMA_MODE_MASK) == DMA_MODE_READ) + __raw_writel(sg->dma_address, DMA_BASE + DMA_DAR(channel)); + else + __raw_writel(sg->dma_address, DMA_BASE + DMA_SAR(channel)); + + __raw_writel(now, DMA_BASE + DMA_CNTR(channel)); + + pr_debug("imxdma%d: next sg chunk dst 0x%08x, src 0x%08x, " + "size 0x%08x\n", channel, + __raw_readl(DMA_BASE + DMA_DAR(channel)), + __raw_readl(DMA_BASE + DMA_SAR(channel)), + __raw_readl(DMA_BASE + DMA_CNTR(channel))); + + return now; +} + +/** + * imx_dma_setup_single - setup i.MX DMA channel for linear memory to/from + * device transfer + * + * @channel: i.MX DMA channel number + * @dma_address: the DMA/physical memory address of the linear data block + * to transfer + * @dma_length: length of the data block in bytes + * @dev_addr: physical device port address + * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory + * or %DMA_MODE_WRITE from memory to the device + * + * Return value: if incorrect parameters are provided -%EINVAL. + * Zero indicates success. + */ +int +imx_dma_setup_single(int channel, dma_addr_t dma_address, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + imxdma->sg = NULL; + imxdma->dma_mode = dmamode; + + if (!dma_address) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single null address\n", + channel); + return -EINVAL; + } + + if (!dma_length) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single zero length\n", + channel); + return -EINVAL; + } + + if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) { + pr_debug("imxdma%d: %s dma_addressg=0x%08x dma_length=%d " + "dev_addr=0x%08x for read\n", + channel, __func__, (unsigned int)dma_address, + dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_SAR(channel)); + __raw_writel(dma_address, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_from_device, + DMA_BASE + DMA_CCR(channel)); + } else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) { + pr_debug("imxdma%d: %s dma_addressg=0x%08x dma_length=%d " + "dev_addr=0x%08x for write\n", + channel, __func__, (unsigned int)dma_address, + dma_length, dev_addr); + + __raw_writel(dma_address, DMA_BASE + DMA_SAR(channel)); + __raw_writel(dev_addr, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_to_device, + DMA_BASE + DMA_CCR(channel)); + } else { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single bad dmamode\n", + channel); + return -EINVAL; + } + + __raw_writel(dma_length, DMA_BASE + DMA_CNTR(channel)); + + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_single); + +/** + * imx_dma_setup_sg - setup i.MX DMA channel SG list to/from device transfer + * @channel: i.MX DMA channel number + * @sg: pointer to the scatter-gather list/vector + * @sgcount: scatter-gather list hungs count + * @dma_length: total length of the transfer request in bytes + * @dev_addr: physical device port address + * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory + * or %DMA_MODE_WRITE from memory to the device + * + * The function sets up DMA channel state and registers to be ready for + * transfer specified by provided parameters. The scatter-gather emulation + * is set up according to the parameters. + * + * The full preparation of the transfer requires setup of more register + * by the caller before imx_dma_enable() can be called. + * + * %BLR(channel) holds transfer burst length in bytes, 0 means 64 bytes + * + * %RSSR(channel) has to be set to the DMA request line source %DMA_REQ_xxx + * + * %CCR(channel) has to specify transfer parameters, the next settings is + * typical for linear or simple scatter-gather transfers if %DMA_MODE_READ is + * specified + * + * %CCR_DMOD_LINEAR | %CCR_DSIZ_32 | %CCR_SMOD_FIFO | %CCR_SSIZ_x + * + * The typical setup for %DMA_MODE_WRITE is specified by next options + * combination + * + * %CCR_SMOD_LINEAR | %CCR_SSIZ_32 | %CCR_DMOD_FIFO | %CCR_DSIZ_x + * + * Be careful here and do not mistakenly mix source and target device + * port sizes constants, they are really different: + * %CCR_SSIZ_8, %CCR_SSIZ_16, %CCR_SSIZ_32, + * %CCR_DSIZ_8, %CCR_DSIZ_16, %CCR_DSIZ_32 + * + * Return value: if incorrect parameters are provided -%EINVAL. + * Zero indicates success. + */ +int +imx_dma_setup_sg(int channel, + struct scatterlist *sg, unsigned int sgcount, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + if (imxdma->in_use) + return -EBUSY; + + imxdma->sg = sg; + imxdma->dma_mode = dmamode; + imxdma->resbytes = dma_length; + + if (!sg || !sgcount) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg epty sg list\n", + channel); + return -EINVAL; + } + + if (!sg->length) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg zero length\n", + channel); + return -EINVAL; + } + + if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) { + pr_debug("imxdma%d: %s sg=%p sgcount=%d total length=%d " + "dev_addr=0x%08x for read\n", + channel, __func__, sg, sgcount, dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_SAR(channel)); + __raw_writel(imxdma->ccr_from_device, + DMA_BASE + DMA_CCR(channel)); + } else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) { + pr_debug("imxdma%d: %s sg=%p sgcount=%d total length=%d " + "dev_addr=0x%08x for write\n", + channel, __func__, sg, sgcount, dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_to_device, + DMA_BASE + DMA_CCR(channel)); + } else { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg bad dmamode\n", + channel); + return -EINVAL; + } + + imx_dma_sg_next(channel, sg); + + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_sg); + +int +imx_dma_config_channel(int channel, unsigned int config_port, + unsigned int config_mem, unsigned int dmareq, int hw_chaining) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + u32 dreq = 0; + + imxdma->hw_chaining = 0; + + if (hw_chaining) { + imxdma->hw_chaining = 1; + if (!imx_dma_hw_chain(imxdma)) + return -EINVAL; + } + + if (dmareq) + dreq = CCR_REN; + + imxdma->ccr_from_device = config_port | (config_mem << 2) | dreq; + imxdma->ccr_to_device = config_mem | (config_port << 2) | dreq; + + __raw_writel(dmareq, DMA_BASE + DMA_RSSR(channel)); + + return 0; +} +EXPORT_SYMBOL(imx_dma_config_channel); + +void imx_dma_config_burstlen(int channel, unsigned int burstlen) +{ + __raw_writel(burstlen, DMA_BASE + DMA_BLR(channel)); +} +EXPORT_SYMBOL(imx_dma_config_burstlen); + +/** + * imx_dma_setup_handlers - setup i.MX DMA channel end and error notification + * handlers + * @channel: i.MX DMA channel number + * @irq_handler: the pointer to the function called if the transfer + * ends successfully + * @err_handler: the pointer to the function called if the premature + * end caused by error occurs + * @data: user specified value to be passed to the handlers + */ +int +imx_dma_setup_handlers(int channel, + void (*irq_handler) (int, void *), + void (*err_handler) (int, void *, int), + void *data) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return -ENODEV; + } + + local_irq_save(flags); + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + imxdma->irq_handler = irq_handler; + imxdma->err_handler = err_handler; + imxdma->data = data; + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_handlers); + +/** + * imx_dma_setup_progression_handler - setup i.MX DMA channel progression + * handlers + * @channel: i.MX DMA channel number + * @prog_handler: the pointer to the function called if the transfer progresses + */ +int +imx_dma_setup_progression_handler(int channel, + void (*prog_handler) (int, void*, struct scatterlist*)) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return -ENODEV; + } + + local_irq_save(flags); + imxdma->prog_handler = prog_handler; + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_progression_handler); + +/** + * imx_dma_enable - function to start i.MX DMA channel operation + * @channel: i.MX DMA channel number + * + * The channel has to be allocated by driver through imx_dma_request() + * or imx_dma_request_by_prio() function. + * The transfer parameters has to be set to the channel registers through + * call of the imx_dma_setup_single() or imx_dma_setup_sg() function + * and registers %BLR(channel), %RSSR(channel) and %CCR(channel) has to + * be set prior this function call by the channel user. + */ +void imx_dma_enable(int channel) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + pr_debug("imxdma%d: imx_dma_enable\n", channel); + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return; + } + + if (imxdma->in_use) + return; + + local_irq_save(flags); + + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) & ~(1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) | CCR_CEN | + CCR_ACRPT, + DMA_BASE + DMA_CCR(channel)); + +#ifdef CONFIG_ARCH_MX2 + if (imxdma->sg && imx_dma_hw_chain(imxdma)) { + imxdma->sg = sg_next(imxdma->sg); + if (imxdma->sg) { + u32 tmp; + imx_dma_sg_next(channel, imxdma->sg); + tmp = __raw_readl(DMA_BASE + DMA_CCR(channel)); + __raw_writel(tmp | CCR_RPT | CCR_ACRPT, + DMA_BASE + DMA_CCR(channel)); + } + } +#endif + imxdma->in_use = 1; + + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_enable); + +/** + * imx_dma_disable - stop, finish i.MX DMA channel operatin + * @channel: i.MX DMA channel number + */ +void imx_dma_disable(int channel) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + pr_debug("imxdma%d: imx_dma_disable\n", channel); + + if (imx_dma_hw_chain(imxdma)) + del_timer(&imxdma->watchdog); + + local_irq_save(flags); + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) | (1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) & ~CCR_CEN, + DMA_BASE + DMA_CCR(channel)); + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + imxdma->in_use = 0; + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_disable); + +static void imx_dma_watchdog(unsigned long chno) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[chno]; + + __raw_writel(0, DMA_BASE + DMA_CCR(chno)); + imxdma->in_use = 0; + imxdma->sg = NULL; + + if (imxdma->err_handler) + imxdma->err_handler(chno, imxdma->data, IMX_DMA_ERR_TIMEOUT); +} + +static irqreturn_t dma_err_handler(int irq, void *dev_id) +{ + int i, disr; + struct imx_dma_channel *imxdma; + unsigned int err_mask; + int errcode; + + disr = __raw_readl(DMA_BASE + DMA_DISR); + + err_mask = __raw_readl(DMA_BASE + DMA_DBTOSR) | + __raw_readl(DMA_BASE + DMA_DRTOSR) | + __raw_readl(DMA_BASE + DMA_DSESR) | + __raw_readl(DMA_BASE + DMA_DBOSR); + + if (!err_mask) + return IRQ_HANDLED; + + __raw_writel(disr & err_mask, DMA_BASE + DMA_DISR); + + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + if (!(err_mask & (1 << i))) + continue; + imxdma = &imx_dma_channels[i]; + errcode = 0; + + if (__raw_readl(DMA_BASE + DMA_DBTOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DBTOSR); + errcode |= IMX_DMA_ERR_BURST; + } + if (__raw_readl(DMA_BASE + DMA_DRTOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DRTOSR); + errcode |= IMX_DMA_ERR_REQUEST; + } + if (__raw_readl(DMA_BASE + DMA_DSESR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DSESR); + errcode |= IMX_DMA_ERR_TRANSFER; + } + if (__raw_readl(DMA_BASE + DMA_DBOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DBOSR); + errcode |= IMX_DMA_ERR_BUFFER; + } + if (imxdma->name && imxdma->err_handler) { + imxdma->err_handler(i, imxdma->data, errcode); + continue; + } + + imx_dma_channels[i].sg = NULL; + + printk(KERN_WARNING + "DMA timeout on channel %d (%s) -%s%s%s%s\n", + i, imxdma->name, + errcode & IMX_DMA_ERR_BURST ? " burst" : "", + errcode & IMX_DMA_ERR_REQUEST ? " request" : "", + errcode & IMX_DMA_ERR_TRANSFER ? " transfer" : "", + errcode & IMX_DMA_ERR_BUFFER ? " buffer" : ""); + } + return IRQ_HANDLED; +} + +static void dma_irq_handle_channel(int chno) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[chno]; + + if (!imxdma->name) { + /* + * IRQ for an unregistered DMA channel: + * let's clear the interrupts and disable it. + */ + printk(KERN_WARNING + "spurious IRQ for DMA channel %d\n", chno); + return; + } + + if (imxdma->sg) { + u32 tmp; + struct scatterlist *current_sg = imxdma->sg; + imxdma->sg = sg_next(imxdma->sg); + + if (imxdma->sg) { + imx_dma_sg_next(chno, imxdma->sg); + + tmp = __raw_readl(DMA_BASE + DMA_CCR(chno)); + + if (imx_dma_hw_chain(imxdma)) { + /* FIXME: The timeout should probably be + * configurable + */ + mod_timer(&imxdma->watchdog, + jiffies + msecs_to_jiffies(500)); + + tmp |= CCR_CEN | CCR_RPT | CCR_ACRPT; + __raw_writel(tmp, DMA_BASE + + DMA_CCR(chno)); + } else { + __raw_writel(tmp & ~CCR_CEN, DMA_BASE + + DMA_CCR(chno)); + tmp |= CCR_CEN; + } + + __raw_writel(tmp, DMA_BASE + DMA_CCR(chno)); + + if (imxdma->prog_handler) + imxdma->prog_handler(chno, imxdma->data, + current_sg); + + return; + } + + if (imx_dma_hw_chain(imxdma)) { + del_timer(&imxdma->watchdog); + return; + } + } + + __raw_writel(0, DMA_BASE + DMA_CCR(chno)); + imxdma->in_use = 0; + if (imxdma->irq_handler) + imxdma->irq_handler(chno, imxdma->data); +} + +static irqreturn_t dma_irq_handler(int irq, void *dev_id) +{ + int i, disr; + +#ifdef CONFIG_ARCH_MX2 + dma_err_handler(irq, dev_id); +#endif + + disr = __raw_readl(DMA_BASE + DMA_DISR); + + pr_debug("imxdma: dma_irq_handler called, disr=0x%08x\n", + disr); + + __raw_writel(disr, DMA_BASE + DMA_DISR); + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + if (disr & (1 << i)) + dma_irq_handle_channel(i); + } + + return IRQ_HANDLED; +} + +/** + * imx_dma_request - request/allocate specified channel number + * @channel: i.MX DMA channel number + * @name: the driver/caller own non-%NULL identification + */ +int imx_dma_request(int channel, const char *name) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + int ret; + + /* basic sanity checks */ + if (!name) + return -EINVAL; + + if (channel >= IMX_DMA_CHANNELS) { + printk(KERN_CRIT "%s: called for non-existed channel %d\n", + __func__, channel); + return -EINVAL; + } + + local_irq_save(flags); + if (imxdma->name) { + local_irq_restore(flags); + return -EBUSY; + } + +#ifdef CONFIG_ARCH_MX2 + ret = request_irq(MXC_INT_DMACH0 + channel, dma_irq_handler, 0, "DMA", + NULL); + if (ret) { + printk(KERN_CRIT "Can't register IRQ %d for DMA channel %d\n", + MXC_INT_DMACH0 + channel, channel); + return ret; + } + init_timer(&imxdma->watchdog); + imxdma->watchdog.function = &imx_dma_watchdog; + imxdma->watchdog.data = channel; +#endif + + imxdma->name = name; + imxdma->irq_handler = NULL; + imxdma->err_handler = NULL; + imxdma->data = NULL; + imxdma->sg = NULL; + + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_request); + +/** + * imx_dma_free - release previously acquired channel + * @channel: i.MX DMA channel number + */ +void imx_dma_free(int channel) +{ + unsigned long flags; + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + if (!imxdma->name) { + printk(KERN_CRIT + "%s: trying to free free channel %d\n", + __func__, channel); + return; + } + + local_irq_save(flags); + /* Disable interrupts */ + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) | (1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) & ~CCR_CEN, + DMA_BASE + DMA_CCR(channel)); + imxdma->name = NULL; + +#ifdef CONFIG_ARCH_MX2 + free_irq(MXC_INT_DMACH0 + channel, NULL); +#endif + + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_free); + +/** + * imx_dma_request_by_prio - find and request some of free channels best + * suiting requested priority + * @channel: i.MX DMA channel number + * @name: the driver/caller own non-%NULL identification + * + * This function tries to find a free channel in the specified priority group + * This function tries to find a free channel in the specified priority group + * if the priority cannot be achieved it tries to look for free channel + * in the higher and then even lower priority groups. + * + * Return value: If there is no free channel to allocate, -%ENODEV is returned. + * On successful allocation channel is returned. + */ +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio) +{ + int i; + int best; + + switch (prio) { + case (DMA_PRIO_HIGH): + best = 8; + break; + case (DMA_PRIO_MEDIUM): + best = 4; + break; + case (DMA_PRIO_LOW): + default: + best = 0; + break; + } + + for (i = best; i < IMX_DMA_CHANNELS; i++) + if (!imx_dma_request(i, name)) + return i; + + for (i = best - 1; i >= 0; i--) + if (!imx_dma_request(i, name)) + return i; + + printk(KERN_ERR "%s: no free DMA channel found\n", __func__); + + return -ENODEV; +} +EXPORT_SYMBOL(imx_dma_request_by_prio); + +static int __init imx_dma_init(void) +{ + int ret = 0; + int i; + + dma_clk = clk_get(NULL, "dma_clk"); + clk_enable(dma_clk); + + /* reset DMA module */ + __raw_writel(DCR_DRST, DMA_BASE + DMA_DCR); + +#ifdef CONFIG_ARCH_MX1 + ret = request_irq(DMA_INT, dma_irq_handler, 0, "DMA", NULL); + if (ret) { + printk(KERN_CRIT "Wow! Can't register IRQ for DMA\n"); + return ret; + } + + ret = request_irq(DMA_ERR, dma_err_handler, 0, "DMA", NULL); + if (ret) { + printk(KERN_CRIT "Wow! Can't register ERRIRQ for DMA\n"); + free_irq(DMA_INT, NULL); + return ret; + } +#endif + /* enable DMA module */ + __raw_writel(DCR_DEN, DMA_BASE + DMA_DCR); + + /* clear all interrupts */ + __raw_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_BASE + DMA_DISR); + + /* disable interrupts */ + __raw_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_BASE + DMA_DIMR); + + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + imx_dma_channels[i].sg = NULL; + imx_dma_channels[i].dma_num = i; + } + + return ret; +} + +arch_initcall(imx_dma_init); diff --git a/arch/arm/plat-mxc/include/mach/board-mx31ads.h b/arch/arm/plat-mxc/include/mach/board-mx31ads.h index 1bc6fb0f9a8..745b48864f9 100644 --- a/arch/arm/plat-mxc/include/mach/board-mx31ads.h +++ b/arch/arm/plat-mxc/include/mach/board-mx31ads.h @@ -90,6 +90,9 @@ #define PBC_INTMASK_CLEAR_REG (PBC_INTMASK_CLEAR + PBC_BASE_ADDRESS) #define EXPIO_PARENT_INT IOMUX_TO_IRQ(MX31_PIN_GPIO1_4) +#define MXC_EXP_IO_BASE (MXC_MAX_INT_LINES + MXC_MAX_GPIO_LINES) +#define MXC_IRQ_TO_EXPIO(irq) ((irq) - MXC_EXP_IO_BASE) + #define EXPIO_INT_LOW_BAT (MXC_EXP_IO_BASE + 0) #define EXPIO_INT_PB_IRQ (MXC_EXP_IO_BASE + 1) #define EXPIO_INT_OTG_FS_OVR (MXC_EXP_IO_BASE + 2) diff --git a/arch/arm/plat-mxc/include/mach/clock.h b/arch/arm/plat-mxc/include/mach/clock.h index 24caa2b7c91..d21f78e7881 100644 --- a/arch/arm/plat-mxc/include/mach/clock.h +++ b/arch/arm/plat-mxc/include/mach/clock.h @@ -39,7 +39,7 @@ struct clk { /* Register bit position for clock's enable/disable control. */ u8 enable_shift; /* Register address for clock's enable/disable control. */ - u32 enable_reg; + void __iomem *enable_reg; u32 flags; /* get the current clock rate (always a fresh value) */ unsigned long (*get_rate) (struct clk *); diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h index a6d2e24aab1..6350287a59b 100644 --- a/arch/arm/plat-mxc/include/mach/common.h +++ b/arch/arm/plat-mxc/include/mach/common.h @@ -11,10 +11,13 @@ #ifndef __ASM_ARCH_MXC_COMMON_H__ #define __ASM_ARCH_MXC_COMMON_H__ +struct platform_device; + extern void mxc_map_io(void); extern void mxc_init_irq(void); extern void mxc_timer_init(const char *clk_timer); extern int mxc_clocks_init(unsigned long fref); extern int mxc_register_gpios(void); +extern int mxc_register_device(struct platform_device *pdev, void *data); #endif diff --git a/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h new file mode 100644 index 00000000000..e85fd946116 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h @@ -0,0 +1,89 @@ +/* + * linux/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa <pisa@cmp.felk.cvut.cz> + * Copyright 2008 Juergen Beisert, <kernel@pengutronix.de> + * Copyright 2008 Sascha Hauer, <s.hauer@pengutronix.de> + * + * 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 + * of the License, or (at your option) any later version. + * 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, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include <asm/dma.h> + +#ifndef __ASM_ARCH_MXC_DMA_H +#define __ASM_ARCH_MXC_DMA_H + +#define IMX_DMA_CHANNELS 16 + +#define DMA_BASE IO_ADDRESS(DMA_BASE_ADDR) + +#define IMX_DMA_MEMSIZE_32 (0 << 4) +#define IMX_DMA_MEMSIZE_8 (1 << 4) +#define IMX_DMA_MEMSIZE_16 (2 << 4) +#define IMX_DMA_TYPE_LINEAR (0 << 10) +#define IMX_DMA_TYPE_2D (1 << 10) +#define IMX_DMA_TYPE_FIFO (2 << 10) + +#define IMX_DMA_ERR_BURST (1 << 0) +#define IMX_DMA_ERR_REQUEST (1 << 1) +#define IMX_DMA_ERR_TRANSFER (1 << 2) +#define IMX_DMA_ERR_BUFFER (1 << 3) +#define IMX_DMA_ERR_TIMEOUT (1 << 4) + +int +imx_dma_config_channel(int channel, unsigned int config_port, + unsigned int config_mem, unsigned int dmareq, int hw_chaining); + +void +imx_dma_config_burstlen(int channel, unsigned int burstlen); + +int +imx_dma_setup_single(int channel, dma_addr_t dma_address, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode); + +int +imx_dma_setup_sg(int channel, struct scatterlist *sg, + unsigned int sgcount, unsigned int dma_length, + unsigned int dev_addr, dmamode_t dmamode); + +int +imx_dma_setup_handlers(int channel, + void (*irq_handler) (int, void *), + void (*err_handler) (int, void *, int), void *data); + +int +imx_dma_setup_progression_handler(int channel, + void (*prog_handler) (int, void*, struct scatterlist*)); + +void imx_dma_enable(int channel); + +void imx_dma_disable(int channel); + +int imx_dma_request(int channel, const char *name); + +void imx_dma_free(int channel); + +enum imx_dma_prio { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 1, + DMA_PRIO_LOW = 2 +}; + +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio); + +#endif /* _ASM_ARCH_MXC_DMA_H */ diff --git a/arch/arm/plat-mxc/include/mach/entry-macro.S b/arch/arm/plat-mxc/include/mach/entry-macro.S index b542433afb1..11632028f7d 100644 --- a/arch/arm/plat-mxc/include/mach/entry-macro.S +++ b/arch/arm/plat-mxc/include/mach/entry-macro.S @@ -9,11 +9,17 @@ * published by the Free Software Foundation. */ +#define AVIC_NIMASK 0x04 + @ this macro disables fast irq (not implemented) .macro disable_fiq .endm .macro get_irqnr_preamble, base, tmp + ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR) +#ifdef CONFIG_MXC_IRQ_PRIOR + ldr r4, [\base, #AVIC_NIMASK] +#endif .endm .macro arch_ret_to_user, tmp1, tmp2 @@ -23,7 +29,6 @@ @ and returns its number in irqnr @ and returns if an interrupt occured in irqstat .macro get_irqnr_and_base, irqnr, irqstat, base, tmp - ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR) @ Load offset & priority of the highest priority @ interrupt pending from AVIC_NIVECSR ldr \irqstat, [\base, #0x40] @@ -32,6 +37,11 @@ mov \irqnr, \irqstat, asr #16 @ set zero flag if IRQ + 1 == 0 adds \tmp, \irqnr, #1 +#ifdef CONFIG_MXC_IRQ_PRIOR + bicne \tmp, \irqstat, #0xFFFFFFE0 + strne \tmp, [\base, #AVIC_NIMASK] + streq r4, [\base, #AVIC_NIMASK] +#endif .endm @ irq priority table (not used) diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h index 076d37b38eb..3d09bfd6c53 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h @@ -247,6 +247,11 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #endif #ifdef CONFIG_ARCH_MX2 +#define PA0_PF_USBH2_CLK (GPIO_PORTA | GPIO_PF | 0) +#define PA1_PF_USBH2_DIR (GPIO_PORTA | GPIO_PF | 1) +#define PA2_PF_USBH2_DATA7 (GPIO_PORTA | GPIO_PF | 2) +#define PA3_PF_USBH2_NXT (GPIO_PORTA | GPIO_PF | 3) +#define PA4_PF_USBH2_STP (GPIO_PORTA | GPIO_PF | 4) #define PA5_PF_LSCLK (GPIO_PORTA | GPIO_OUT | GPIO_PF | 5) #define PA6_PF_LD0 (GPIO_PORTA | GPIO_OUT | GPIO_PF | 6) #define PA7_PF_LD1 (GPIO_PORTA | GPIO_OUT | GPIO_PF | 7) @@ -294,6 +299,16 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PB20_AF_UART5_CTS (GPIO_PORTB | GPIO_OUT | GPIO_AF | 20) #define PB21_PF_CSI_HSYNC (GPIO_PORTB | GPIO_OUT | GPIO_PF | 21) #define PB21_AF_UART5_RTS (GPIO_PORTB | GPIO_IN | GPIO_AF | 21) +#define PB22_PF_USBH1_SUSP (GPIO_PORTB | GPIO_PF | 22) +#define PB23_PF_USB_PWR (GPIO_PORTB | GPIO_PF | 23) +#define PB24_PF_USB_OC_B (GPIO_PORTB | GPIO_PF | 24) +#define PB25_PF_USBH1_RCV (GPIO_PORTB | GPIO_PF | 25) +#define PB26_PF_USBH1_FS (GPIO_PORTB | GPIO_PF | 26) +#define PB27_PF_USBH1_OE_B (GPIO_PORTB | GPIO_PF | 27) +#define PB28_PF_USBH1_TXDM (GPIO_PORTB | GPIO_PF | 28) +#define PB29_PF_USBH1_TXDP (GPIO_PORTB | GPIO_PF | 29) +#define PB30_PF_USBH1_RXDM (GPIO_PORTB | GPIO_PF | 30) +#define PB31_PF_USBH1_RXDP (GPIO_PORTB | GPIO_PF | 31) #define PB26_AF_UART4_RTS (GPIO_PORTB | GPIO_IN | GPIO_PF | 26) #define PB28_AF_UART4_TXD (GPIO_PORTB | GPIO_OUT | GPIO_AF | 28) #define PB29_AF_UART4_CTS (GPIO_PORTB | GPIO_OUT | GPIO_AF | 29) @@ -335,8 +350,15 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PD16_AIN_FEC_TX_ER (GPIO_PORTD | GPIO_OUT | GPIO_AIN | 16) #define PD17_PF_I2C_DATA (GPIO_PORTD | GPIO_OUT | GPIO_PF | 17) #define PD18_PF_I2C_CLK (GPIO_PORTD | GPIO_OUT | GPIO_PF | 18) +#define PD19_AF_USBH2_DATA4 (GPIO_PORTD | GPIO_AF | 19) +#define PD20_AF_USBH2_DATA3 (GPIO_PORTD | GPIO_AF | 20) +#define PD21_AF_USBH2_DATA6 (GPIO_PORTD | GPIO_AF | 21) +#define PD22_AF_USBH2_DATA0 (GPIO_PORTD | GPIO_AF | 22) +#define PD23_AF_USBH2_DATA2 (GPIO_PORTD | GPIO_AF | 23) +#define PD24_AF_USBH2_DATA1 (GPIO_PORTD | GPIO_AF | 24) #define PD25_PF_CSPI1_RDY (GPIO_PORTD | GPIO_OUT | GPIO_PF | 25) #define PD26_PF_CSPI1_SS2 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 26) +#define PD26_AF_USBH2_DATA5 (GPIO_PORTD | GPIO_AF | 26) #define PD27_PF_CSPI1_SS1 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 27) #define PD28_PF_CSPI1_SS0 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 28) #define PD29_PF_CSPI1_SCLK (GPIO_PORTD | GPIO_OUT | GPIO_PF | 29) @@ -355,6 +377,8 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PE13_PF_UART1_RXD (GPIO_PORTE | GPIO_IN | GPIO_PF | 13) #define PE14_PF_UART1_CTS (GPIO_PORTE | GPIO_OUT | GPIO_PF | 14) #define PE15_PF_UART1_RTS (GPIO_PORTE | GPIO_IN | GPIO_PF | 15) +#define PE16_AF_RTCK (GPIO_PORTE | GPIO_OUT | GPIO_AF | 16) +#define PE16_PF_RTCK (GPIO_PORTE | GPIO_OUT | GPIO_PF | 16) #define PE18_AF_CSPI3_MISO (GPIO_PORTE | GPIO_IN | GPIO_AF | 18) #define PE21_AF_CSPI3_SS (GPIO_PORTE | GPIO_OUT | GPIO_AF | 21) #define PE22_AF_CSPI3_MOSI (GPIO_PORTE | GPIO_OUT | GPIO_AF | 22) diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx3.h b/arch/arm/plat-mxc/include/mach/iomux-mx3.h index 7509e7692f0..c9f39c2fb8c 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx3.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx3.h @@ -491,6 +491,26 @@ enum iomux_pins { #define MX31_PIN_RTS1__RTS1 IOMUX_MODE(MX31_PIN_RTS1, IOMUX_CONFIG_FUNC) #define MX31_PIN_TXD1__TXD1 IOMUX_MODE(MX31_PIN_TXD1, IOMUX_CONFIG_FUNC) #define MX31_PIN_RXD1__RXD1 IOMUX_MODE(MX31_PIN_RXD1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI1_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI1_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI1_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI1_SPI_RDY, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS0__SS0 IOMUX_MODE(MX31_PIN_CSPI1_SS0, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS1__SS1 IOMUX_MODE(MX31_PIN_CSPI1_SS1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS2__SS2 IOMUX_MODE(MX31_PIN_CSPI1_SS2, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI2_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI2_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI2_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI2_SPI_RDY, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS0__SS0 IOMUX_MODE(MX31_PIN_CSPI2_SS0, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS1__SS1 IOMUX_MODE(MX31_PIN_CSPI2_SS1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS2__SS2 IOMUX_MODE(MX31_PIN_CSPI2_SS2, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI3_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI3_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI3_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI3_SPI_RDY, IOMUX_CONFIG_FUNC) +/*XXX: The SS0, SS1, SS2, SS3 lines of spi3 are multiplexed by cspi2_ss0, cspi2_ss1, cspi1_ss0 + * cspi1_ss1*/ /* * This function configures the pad value for a IOMUX pin. diff --git a/arch/arm/plat-mxc/include/mach/irqs.h b/arch/arm/plat-mxc/include/mach/irqs.h index 228c4f68ccd..b55bba35e18 100644 --- a/arch/arm/plat-mxc/include/mach/irqs.h +++ b/arch/arm/plat-mxc/include/mach/irqs.h @@ -12,5 +12,6 @@ #define __ASM_ARCH_MXC_IRQS_H__ #include <mach/hardware.h> +extern void imx_irq_set_priority(unsigned char irq, unsigned char prio); #endif /* __ASM_ARCH_MXC_IRQS_H__ */ diff --git a/arch/arm/plat-mxc/include/mach/mx27.h b/arch/arm/plat-mxc/include/mach/mx27.h index 212ecc24662..a86db64744a 100644 --- a/arch/arm/plat-mxc/include/mach/mx27.h +++ b/arch/arm/plat-mxc/include/mach/mx27.h @@ -128,6 +128,7 @@ * it returns 0xDEADBEEF */ #define IO_ADDRESS(x) \ + (void __iomem *) \ (((x >= AIPI_BASE_ADDR) && (x < (AIPI_BASE_ADDR + AIPI_SIZE))) ? \ AIPI_IO_ADDRESS(x) : \ ((x >= SAHB1_BASE_ADDR) && (x < (SAHB1_BASE_ADDR + SAHB1_SIZE))) ? \ diff --git a/arch/arm/plat-mxc/include/mach/mx31.h b/arch/arm/plat-mxc/include/mach/mx31.h index a7373e4a56c..0536f8917bc 100644 --- a/arch/arm/plat-mxc/include/mach/mx31.h +++ b/arch/arm/plat-mxc/include/mach/mx31.h @@ -198,6 +198,7 @@ * it returns 0xDEADBEEF */ #define IO_ADDRESS(x) \ + (void __iomem *) \ (((x >= IRAM_BASE_ADDR) && (x < (IRAM_BASE_ADDR + IRAM_SIZE))) ? IRAM_IO_ADDRESS(x):\ ((x >= L2CC_BASE_ADDR) && (x < (L2CC_BASE_ADDR + L2CC_SIZE))) ? L2CC_IO_ADDRESS(x):\ ((x >= AIPS1_BASE_ADDR) && (x < (AIPS1_BASE_ADDR + AIPS1_SIZE))) ? AIPS1_IO_ADDRESS(x):\ diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index 332eda4dbd3..f6caab06213 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -33,4 +33,10 @@ # define cpu_is_mx27() (0) #endif +#if defined(CONFIG_ARCH_MX3) || defined(CONFIG_ARCH_MX2) +#define CSCR_U(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10) +#define CSCR_L(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10 + 0x4) +#define CSCR_A(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10 + 0x8) +#endif + #endif /* __ASM_ARCH_MXC_H__ */ diff --git a/arch/arm/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c index c6b837893d8..d862c9e5f8d 100644 --- a/arch/arm/plat-mxc/irq.c +++ b/arch/arm/plat-mxc/irq.c @@ -30,14 +30,7 @@ #define AVIC_INTENABLEL (AVIC_BASE + 0x14) /* int enable reg low */ #define AVIC_INTTYPEH (AVIC_BASE + 0x18) /* int type reg high */ #define AVIC_INTTYPEL (AVIC_BASE + 0x1C) /* int type reg low */ -#define AVIC_NIPRIORITY7 (AVIC_BASE + 0x20) /* norm int priority lvl7 */ -#define AVIC_NIPRIORITY6 (AVIC_BASE + 0x24) /* norm int priority lvl6 */ -#define AVIC_NIPRIORITY5 (AVIC_BASE + 0x28) /* norm int priority lvl5 */ -#define AVIC_NIPRIORITY4 (AVIC_BASE + 0x2C) /* norm int priority lvl4 */ -#define AVIC_NIPRIORITY3 (AVIC_BASE + 0x30) /* norm int priority lvl3 */ -#define AVIC_NIPRIORITY2 (AVIC_BASE + 0x34) /* norm int priority lvl2 */ -#define AVIC_NIPRIORITY1 (AVIC_BASE + 0x38) /* norm int priority lvl1 */ -#define AVIC_NIPRIORITY0 (AVIC_BASE + 0x3C) /* norm int priority lvl0 */ +#define AVIC_NIPRIORITY(x) (AVIC_BASE + (0x20 + 4 * (7 - (x)))) /* int priority */ #define AVIC_NIVECSR (AVIC_BASE + 0x40) /* norm int vector/status */ #define AVIC_FIVECSR (AVIC_BASE + 0x44) /* fast int vector/status */ #define AVIC_INTSRCH (AVIC_BASE + 0x48) /* int source reg high */ @@ -54,6 +47,24 @@ #define IIM_PROD_REV_SH 3 #define IIM_PROD_REV_LEN 5 +#ifdef CONFIG_MXC_IRQ_PRIOR +void imx_irq_set_priority(unsigned char irq, unsigned char prio) +{ + unsigned int temp; + unsigned int mask = 0x0F << irq % 8 * 4; + + if (irq > 63) + return; + + temp = __raw_readl(AVIC_NIPRIORITY(irq / 8)); + temp &= ~mask; + temp |= prio & mask; + + __raw_writel(temp, AVIC_NIPRIORITY(irq / 8)); +} +EXPORT_SYMBOL(imx_irq_set_priority); +#endif + /* Disable interrupt number "irq" in the AVIC */ static void mxc_mask_irq(unsigned int irq) { @@ -101,10 +112,9 @@ void __init mxc_init_irq(void) set_irq_flags(i, IRQF_VALID); } - /* Set WDOG2's interrupt the highest priority level (bit 28-31) */ - reg = __raw_readl(AVIC_NIPRIORITY6); - reg |= (0xF << 28); - __raw_writel(reg, AVIC_NIPRIORITY6); + /* Set default priority value (0) for all IRQ's */ + for (i = 0; i < 8; i++) + __raw_writel(0, AVIC_NIPRIORITY(i)); /* init architectures chained interrupt handler */ mxc_register_gpios(); |