/* 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
/*
*
* 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.
*
*/
__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)
{
/* Release masking of interrupts according to priority */
__raw_writel(-1, IMX_AITC_NIMASK);
+
+#ifdef CONFIG_FIQ
+ /* Initialize FIQ */
+ init_FIQ();
+#endif
}
--- /dev/null
+
+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;
+
#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,
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));
}
#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
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));
},
};
-static struct platform_device mxc_uart_device0 = {
+struct platform_device mxc_uart_device0 = {
.name = "imx-uart",
.id = 0,
.resource = uart0,
},
};
-static struct platform_device mxc_uart_device1 = {
+struct platform_device mxc_uart_device1 = {
.name = "imx-uart",
.id = 1,
.resource = uart1,
},
};
-static struct platform_device mxc_uart_device2 = {
+struct platform_device mxc_uart_device2 = {
.name = "imx-uart",
.id = 2,
.resource = uart2,
},
};
-static struct platform_device mxc_uart_device3 = {
+struct platform_device mxc_uart_device3 = {
.name = "imx-uart",
.id = 3,
.resource = uart3,
},
};
-static struct platform_device mxc_uart_device4 = {
+struct platform_device mxc_uart_device4 = {
.name = "imx-uart",
.id = 4,
.resource = uart4,
},
};
-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;
-}
},
};
-static struct platform_device mxc_uart_device0 = {
+struct platform_device mxc_uart_device0 = {
.name = "imx-uart",
.id = 0,
.resource = uart0,
},
};
-static struct platform_device mxc_uart_device1 = {
+struct platform_device mxc_uart_device1 = {
.name = "imx-uart",
.id = 1,
.resource = uart1,
},
};
-static struct platform_device mxc_uart_device2 = {
+struct platform_device mxc_uart_device2 = {
.name = "imx-uart",
.id = 2,
.resource = uart2,
},
};
-static struct platform_device mxc_uart_device3 = {
+struct platform_device mxc_uart_device3 = {
.name = "imx-uart",
.id = 3,
.resource = uart3,
},
};
-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] = {
--- /dev/null
+
+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;
*/
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;
*/
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;
#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>
#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
}
#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.
*/
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)
.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
#include <mach/iomux-mx3.h>
#include <mach/board-pcm037.h>
+#include "devices.h"
+
static struct physmap_flash_data pcm037_flash_data = {
.width = 2,
};
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);
}
/*
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
#
# 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
--- /dev/null
+/*
+ * 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;
+}
+
--- /dev/null
+/*
+ * 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);
#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)
/* 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 *);
#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
--- /dev/null
+/*
+ * 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 */
* 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
@ 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]
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)
#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)
#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)
#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)
#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)
#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.
#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__ */
* 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))) ? \
* 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):\
# 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__ */
#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 */
#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)
{
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();
projects / linux-2.6-omap-h63xx.git / commitdiff