+++ /dev/null
- S3C2410 DMA
- ===========
-
-Introduction
-------------
-
- The kernel provides an interface to manage DMA transfers
- using the DMA channels in the CPU, so that the central
- duty of managing channel mappings, and programming the
- channel generators is in one place.
-
-
-DMA Channel Ordering
---------------------
-
- Many of the range do not have connections for the DMA
- channels to all sources, which means that some devices
- have a restricted number of channels that can be used.
-
- To allow flexibility for each CPU type and board, the
- DMA code can be given a DMA ordering structure which
- allows the order of channel search to be specified, as
- well as allowing the prohibition of certain claims.
-
- struct s3c24xx_dma_order has a list of channels, and
- each channel within has a slot for a list of DMA
- channel numbers. The slots are searched in order for
- the presence of a DMA channel number with DMA_CH_VALID
- or-ed in.
-
- If the order has the flag DMA_CH_NEVER set, then after
- checking the channel list, the system will return no
- found channel, thus denying the request.
-
- A board support file can call s3c24xx_dma_order_set()
- to register a complete ordering set. The routine will
- copy the data, so the original can be discarded with
- __initdata.
-
-
-Authour
--------
-
-Ben Dooks,
-Copyright (c) 2007 Ben Dooks, Simtec Electronics
-Licensed under the GPL v2
+++ /dev/null
-/*
- * Copyright (C) 2010 Samsung Electronics Co. Ltd.
- * Jaswinder Singh <jassi.brar@samsung.com>
- *
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#ifndef __MACH_DMA_H
-#define __MACH_DMA_H
-
-/* This platform uses the common DMA API driver for PL330 */
-#include <plat/dma-pl330.h>
-
-#endif /* __MACH_DMA_H */
default y
select CPU_ARM920T
select S3C2410_COMMON_CLK
- select S3C2410_DMA if S3C24XX_DMA
select ARM_S3C2410_CPUFREQ if ARM_S3C24XX_CPUFREQ
select S3C2410_PM if PM
help
bool "SAMSUNG S3C2412"
select CPU_ARM926T
select S3C2412_COMMON_CLK
- select S3C2412_DMA if S3C24XX_DMA
select S3C2412_PM if PM
help
Support for the S3C2412 and S3C2413 SoCs from the S3C24XX line
select CPU_ARM926T
select S3C2416_PM if PM
select S3C2443_COMMON_CLK
- select S3C2443_DMA if S3C24XX_DMA
help
Support for the S3C2416 SoC from the S3C24XX line
select CPU_ARM920T
select S3C2410_COMMON_CLK
select S3C2410_PM if PM
- select S3C2440_DMA if S3C24XX_DMA
help
Support for S3C2440 Samsung Mobile CPU based systems.
bool "SAMSUNG S3C2442"
select CPU_ARM920T
select S3C2410_COMMON_CLK
- select S3C2410_DMA if S3C24XX_DMA
select S3C2410_PM if PM
help
Support for S3C2442 Samsung Mobile CPU based systems.
bool "SAMSUNG S3C2443"
select CPU_ARM920T
select S3C2443_COMMON_CLK
- select S3C2443_DMA if S3C24XX_DMA
help
Support for the S3C2443 SoC from the S3C24XX line
help
Compile in platform device definition for Samsung TouchScreen.
-config S3C24XX_DMA
- bool "S3C2410 DMA support (deprecated)"
- select S3C_DMA
- help
- S3C2410 DMA support. This is needed for drivers like sound which
- use the S3C2410's DMA system to move data to and from the
- peripheral blocks.
-
-config S3C2410_DMA_DEBUG
- bool "S3C2410 DMA support debug"
- depends on S3C2410_DMA
- help
- Enable debugging output for the DMA code. This option sends info
- to the kernel log, at priority KERN_DEBUG.
-
-config S3C2410_DMA
- bool
- depends on S3C24XX_DMA && (CPU_S3C2410 || CPU_S3C2442)
- help
- DMA device selection for S3C2410 and compatible CPUs
-
config S3C2410_PM
bool
help
!CPU_S3C2442 && !CPU_S3C2443
default y
-config S3C2412_DMA
- bool
- help
- Internal config node for S3C2412 DMA support
-
config S3C2412_PM
bool
select S3C2412_PM_SLEEP
if CPU_S3C2440
-config S3C2440_DMA
- bool
- help
- Support for S3C2440 specific DMA code5A
-
config S3C2440_XTAL_12000000
bool
help
if CPU_S3C2443 || CPU_S3C2416
-config S3C2443_DMA
- bool
- help
- Internal config node for S3C2443 DMA support
-
config S3C2443_SETUP_SPI
bool
help
obj-y += common.o
obj-$(CONFIG_CPU_S3C2410) += s3c2410.o
-obj-$(CONFIG_S3C2410_DMA) += dma-s3c2410.o
obj-$(CONFIG_S3C2410_PLL) += pll-s3c2410.o
obj-$(CONFIG_S3C2410_PM) += pm-s3c2410.o sleep-s3c2410.o
obj-$(CONFIG_CPU_S3C2412) += s3c2412.o
-obj-$(CONFIG_S3C2412_DMA) += dma-s3c2412.o
obj-$(CONFIG_S3C2412_PM) += pm-s3c2412.o
obj-$(CONFIG_S3C2412_PM_SLEEP) += sleep-s3c2412.o
obj-$(CONFIG_CPU_S3C2440) += s3c2440.o
obj-$(CONFIG_CPU_S3C2442) += s3c2442.o
obj-$(CONFIG_CPU_S3C244X) += s3c244x.o
-obj-$(CONFIG_S3C2440_DMA) += dma-s3c2440.o
obj-$(CONFIG_S3C2440_PLL_12000000) += pll-s3c2440-12000000.o
obj-$(CONFIG_S3C2440_PLL_16934400) += pll-s3c2440-16934400.o
# common code
-obj-$(CONFIG_S3C24XX_DMA) += dma.o
-
obj-$(CONFIG_S3C2410_CPUFREQ_UTILS) += cpufreq-utils.o
obj-$(CONFIG_S3C2410_IOTIMING) += iotiming-s3c2410.o
obj-$(CONFIG_S3C2412_IOTIMING) += iotiming-s3c2412.o
-obj-$(CONFIG_S3C2443_DMA) += dma-s3c2443.o
-
#
# machine support
# following is ordered alphabetically by option text.
+++ /dev/null
-/* linux/arch/arm/mach-s3c2410/dma.c
- *
- * Copyright (c) 2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2410 DMA selection
- *
- * http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial_core.h>
-#include <linux/serial_s3c.h>
-
-#include <mach/map.h>
-#include <mach/dma.h>
-
-#include <plat/cpu.h>
-#include <plat/dma-s3c24xx.h>
-
-#include <mach/regs-gpio.h>
-#include <plat/regs-dma.h>
-#include <mach/regs-lcd.h>
-#include <plat/regs-spi.h>
-
-static struct s3c24xx_dma_map __initdata s3c2410_dma_mappings[] = {
- [DMACH_XD0] = {
- .name = "xdreq0",
- .channels[0] = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
- },
- [DMACH_XD1] = {
- .name = "xdreq1",
- .channels[1] = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
- },
- [DMACH_SDI] = {
- .name = "sdi",
- .channels[0] = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
- .channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
- },
- [DMACH_SPI0] = {
- .name = "spi0",
- .channels[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
- },
- [DMACH_SPI1] = {
- .name = "spi1",
- .channels[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
- },
- [DMACH_UART0] = {
- .name = "uart0",
- .channels[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
- },
- [DMACH_UART1] = {
- .name = "uart1",
- .channels[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
- },
- [DMACH_UART2] = {
- .name = "uart2",
- .channels[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
- },
- [DMACH_TIMER] = {
- .name = "timer",
- .channels[0] = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
- .channels[3] = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
- },
- [DMACH_I2S_IN] = {
- .name = "i2s-sdi",
- .channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
- },
- [DMACH_I2S_OUT] = {
- .name = "i2s-sdo",
- .channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
- },
- [DMACH_USB_EP1] = {
- .name = "usb-ep1",
- .channels[0] = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
- },
- [DMACH_USB_EP2] = {
- .name = "usb-ep2",
- .channels[1] = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
- },
- [DMACH_USB_EP3] = {
- .name = "usb-ep3",
- .channels[2] = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
- },
- [DMACH_USB_EP4] = {
- .name = "usb-ep4",
- .channels[3] =S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
- },
-};
-
-static void s3c2410_dma_select(struct s3c2410_dma_chan *chan,
- struct s3c24xx_dma_map *map)
-{
- chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
-}
-
-static struct s3c24xx_dma_selection __initdata s3c2410_dma_sel = {
- .select = s3c2410_dma_select,
- .dcon_mask = 7 << 24,
- .map = s3c2410_dma_mappings,
- .map_size = ARRAY_SIZE(s3c2410_dma_mappings),
-};
-
-static struct s3c24xx_dma_order __initdata s3c2410_dma_order = {
- .channels = {
- [DMACH_SDI] = {
- .list = {
- [0] = 3 | DMA_CH_VALID,
- [1] = 2 | DMA_CH_VALID,
- [2] = 0 | DMA_CH_VALID,
- },
- },
- [DMACH_I2S_IN] = {
- .list = {
- [0] = 1 | DMA_CH_VALID,
- [1] = 2 | DMA_CH_VALID,
- },
- },
- },
-};
-
-static int __init s3c2410_dma_add(struct device *dev,
- struct subsys_interface *sif)
-{
- s3c2410_dma_init();
- s3c24xx_dma_order_set(&s3c2410_dma_order);
- return s3c24xx_dma_init_map(&s3c2410_dma_sel);
-}
-
-#if defined(CONFIG_CPU_S3C2410)
-static struct subsys_interface s3c2410_dma_interface = {
- .name = "s3c2410_dma",
- .subsys = &s3c2410_subsys,
- .add_dev = s3c2410_dma_add,
-};
-
-static int __init s3c2410_dma_drvinit(void)
-{
- return subsys_interface_register(&s3c2410_dma_interface);
-}
-
-arch_initcall(s3c2410_dma_drvinit);
-
-static struct subsys_interface s3c2410a_dma_interface = {
- .name = "s3c2410a_dma",
- .subsys = &s3c2410a_subsys,
- .add_dev = s3c2410_dma_add,
-};
-
-static int __init s3c2410a_dma_drvinit(void)
-{
- return subsys_interface_register(&s3c2410a_dma_interface);
-}
-
-arch_initcall(s3c2410a_dma_drvinit);
-#endif
-
-#if defined(CONFIG_CPU_S3C2442)
-/* S3C2442 DMA contains the same selection table as the S3C2410 */
-static struct subsys_interface s3c2442_dma_interface = {
- .name = "s3c2442_dma",
- .subsys = &s3c2442_subsys,
- .add_dev = s3c2410_dma_add,
-};
-
-static int __init s3c2442_dma_drvinit(void)
-{
- return subsys_interface_register(&s3c2442_dma_interface);
-}
-
-arch_initcall(s3c2442_dma_drvinit);
-#endif
-
+++ /dev/null
-/* linux/arch/arm/mach-s3c2412/dma.c
- *
- * Copyright (c) 2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2412 DMA selection
- *
- * http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial_core.h>
-#include <linux/serial_s3c.h>
-#include <linux/io.h>
-
-#include <mach/dma.h>
-
-#include <plat/dma-s3c24xx.h>
-#include <plat/cpu.h>
-
-#include <mach/regs-gpio.h>
-#include <plat/regs-dma.h>
-#include <mach/regs-lcd.h>
-#include <plat/regs-spi.h>
-
-#define MAP(x) { (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID, (x)| DMA_CH_VALID }
-
-static struct s3c24xx_dma_map __initdata s3c2412_dma_mappings[] = {
- [DMACH_XD0] = {
- .name = "xdreq0",
- .channels = MAP(S3C2412_DMAREQSEL_XDREQ0),
- },
- [DMACH_XD1] = {
- .name = "xdreq1",
- .channels = MAP(S3C2412_DMAREQSEL_XDREQ1),
- },
- [DMACH_SDI] = {
- .name = "sdi",
- .channels = MAP(S3C2412_DMAREQSEL_SDI),
- },
- [DMACH_SPI0_RX] = {
- .name = "spi0-rx",
- .channels = MAP(S3C2412_DMAREQSEL_SPI0RX),
- },
- [DMACH_SPI0_TX] = {
- .name = "spi0-tx",
- .channels = MAP(S3C2412_DMAREQSEL_SPI0TX),
- },
- [DMACH_SPI1_RX] = {
- .name = "spi1-rx",
- .channels = MAP(S3C2412_DMAREQSEL_SPI1RX),
- },
- [DMACH_SPI1_TX] = {
- .name = "spi1-tx",
- .channels = MAP(S3C2412_DMAREQSEL_SPI1TX),
- },
- [DMACH_UART0] = {
- .name = "uart0",
- .channels = MAP(S3C2412_DMAREQSEL_UART0_0),
- },
- [DMACH_UART1] = {
- .name = "uart1",
- .channels = MAP(S3C2412_DMAREQSEL_UART1_0),
- },
- [DMACH_UART2] = {
- .name = "uart2",
- .channels = MAP(S3C2412_DMAREQSEL_UART2_0),
- },
- [DMACH_UART0_SRC2] = {
- .name = "uart0",
- .channels = MAP(S3C2412_DMAREQSEL_UART0_1),
- },
- [DMACH_UART1_SRC2] = {
- .name = "uart1",
- .channels = MAP(S3C2412_DMAREQSEL_UART1_1),
- },
- [DMACH_UART2_SRC2] = {
- .name = "uart2",
- .channels = MAP(S3C2412_DMAREQSEL_UART2_1),
- },
- [DMACH_TIMER] = {
- .name = "timer",
- .channels = MAP(S3C2412_DMAREQSEL_TIMER),
- },
- [DMACH_I2S_IN] = {
- .name = "i2s-sdi",
- .channels = MAP(S3C2412_DMAREQSEL_I2SRX),
- },
- [DMACH_I2S_OUT] = {
- .name = "i2s-sdo",
- .channels = MAP(S3C2412_DMAREQSEL_I2STX),
- },
- [DMACH_USB_EP1] = {
- .name = "usb-ep1",
- .channels = MAP(S3C2412_DMAREQSEL_USBEP1),
- },
- [DMACH_USB_EP2] = {
- .name = "usb-ep2",
- .channels = MAP(S3C2412_DMAREQSEL_USBEP2),
- },
- [DMACH_USB_EP3] = {
- .name = "usb-ep3",
- .channels = MAP(S3C2412_DMAREQSEL_USBEP3),
- },
- [DMACH_USB_EP4] = {
- .name = "usb-ep4",
- .channels = MAP(S3C2412_DMAREQSEL_USBEP4),
- },
-};
-
-static void s3c2412_dma_select(struct s3c2410_dma_chan *chan,
- struct s3c24xx_dma_map *map)
-{
- unsigned long chsel = map->channels[0] & (~DMA_CH_VALID);
- writel(chsel | S3C2412_DMAREQSEL_HW,
- chan->regs + S3C2412_DMA_DMAREQSEL);
-}
-
-static struct s3c24xx_dma_selection __initdata s3c2412_dma_sel = {
- .select = s3c2412_dma_select,
- .dcon_mask = 0,
- .map = s3c2412_dma_mappings,
- .map_size = ARRAY_SIZE(s3c2412_dma_mappings),
-};
-
-static int __init s3c2412_dma_add(struct device *dev,
- struct subsys_interface *sif)
-{
- s3c2410_dma_init();
- return s3c24xx_dma_init_map(&s3c2412_dma_sel);
-}
-
-static struct subsys_interface s3c2412_dma_interface = {
- .name = "s3c2412_dma",
- .subsys = &s3c2412_subsys,
- .add_dev = s3c2412_dma_add,
-};
-
-static int __init s3c2412_dma_init(void)
-{
- return subsys_interface_register(&s3c2412_dma_interface);
-}
-
-arch_initcall(s3c2412_dma_init);
+++ /dev/null
-/* linux/arch/arm/mach-s3c2440/dma.c
- *
- * Copyright (c) 2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2440 DMA selection
- *
- * http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial_core.h>
-#include <linux/serial_s3c.h>
-
-#include <mach/map.h>
-#include <mach/dma.h>
-
-#include <plat/dma-s3c24xx.h>
-#include <plat/cpu.h>
-
-#include <mach/regs-gpio.h>
-#include <plat/regs-dma.h>
-#include <mach/regs-lcd.h>
-#include <plat/regs-spi.h>
-
-static struct s3c24xx_dma_map __initdata s3c2440_dma_mappings[] = {
- [DMACH_XD0] = {
- .name = "xdreq0",
- .channels[0] = S3C2410_DCON_CH0_XDREQ0 | DMA_CH_VALID,
- },
- [DMACH_XD1] = {
- .name = "xdreq1",
- .channels[1] = S3C2410_DCON_CH1_XDREQ1 | DMA_CH_VALID,
- },
- [DMACH_SDI] = {
- .name = "sdi",
- .channels[0] = S3C2410_DCON_CH0_SDI | DMA_CH_VALID,
- .channels[1] = S3C2440_DCON_CH1_SDI | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_SDI | DMA_CH_VALID,
- .channels[3] = S3C2410_DCON_CH3_SDI | DMA_CH_VALID,
- },
- [DMACH_SPI0] = {
- .name = "spi0",
- .channels[1] = S3C2410_DCON_CH1_SPI | DMA_CH_VALID,
- },
- [DMACH_SPI1] = {
- .name = "spi1",
- .channels[3] = S3C2410_DCON_CH3_SPI | DMA_CH_VALID,
- },
- [DMACH_UART0] = {
- .name = "uart0",
- .channels[0] = S3C2410_DCON_CH0_UART0 | DMA_CH_VALID,
- },
- [DMACH_UART1] = {
- .name = "uart1",
- .channels[1] = S3C2410_DCON_CH1_UART1 | DMA_CH_VALID,
- },
- [DMACH_UART2] = {
- .name = "uart2",
- .channels[3] = S3C2410_DCON_CH3_UART2 | DMA_CH_VALID,
- },
- [DMACH_TIMER] = {
- .name = "timer",
- .channels[0] = S3C2410_DCON_CH0_TIMER | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_TIMER | DMA_CH_VALID,
- .channels[3] = S3C2410_DCON_CH3_TIMER | DMA_CH_VALID,
- },
- [DMACH_I2S_IN] = {
- .name = "i2s-sdi",
- .channels[1] = S3C2410_DCON_CH1_I2SSDI | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_I2SSDI | DMA_CH_VALID,
- },
- [DMACH_I2S_OUT] = {
- .name = "i2s-sdo",
- .channels[0] = S3C2440_DCON_CH0_I2SSDO | DMA_CH_VALID,
- .channels[2] = S3C2410_DCON_CH2_I2SSDO | DMA_CH_VALID,
- },
- [DMACH_PCM_IN] = {
- .name = "pcm-in",
- .channels[0] = S3C2440_DCON_CH0_PCMIN | DMA_CH_VALID,
- .channels[2] = S3C2440_DCON_CH2_PCMIN | DMA_CH_VALID,
- },
- [DMACH_PCM_OUT] = {
- .name = "pcm-out",
- .channels[1] = S3C2440_DCON_CH1_PCMOUT | DMA_CH_VALID,
- .channels[3] = S3C2440_DCON_CH3_PCMOUT | DMA_CH_VALID,
- },
- [DMACH_MIC_IN] = {
- .name = "mic-in",
- .channels[2] = S3C2440_DCON_CH2_MICIN | DMA_CH_VALID,
- .channels[3] = S3C2440_DCON_CH3_MICIN | DMA_CH_VALID,
- },
- [DMACH_USB_EP1] = {
- .name = "usb-ep1",
- .channels[0] = S3C2410_DCON_CH0_USBEP1 | DMA_CH_VALID,
- },
- [DMACH_USB_EP2] = {
- .name = "usb-ep2",
- .channels[1] = S3C2410_DCON_CH1_USBEP2 | DMA_CH_VALID,
- },
- [DMACH_USB_EP3] = {
- .name = "usb-ep3",
- .channels[2] = S3C2410_DCON_CH2_USBEP3 | DMA_CH_VALID,
- },
- [DMACH_USB_EP4] = {
- .name = "usb-ep4",
- .channels[3] = S3C2410_DCON_CH3_USBEP4 | DMA_CH_VALID,
- },
-};
-
-static void s3c2440_dma_select(struct s3c2410_dma_chan *chan,
- struct s3c24xx_dma_map *map)
-{
- chan->dcon = map->channels[chan->number] & ~DMA_CH_VALID;
-}
-
-static struct s3c24xx_dma_selection __initdata s3c2440_dma_sel = {
- .select = s3c2440_dma_select,
- .dcon_mask = 7 << 24,
- .map = s3c2440_dma_mappings,
- .map_size = ARRAY_SIZE(s3c2440_dma_mappings),
-};
-
-static struct s3c24xx_dma_order __initdata s3c2440_dma_order = {
- .channels = {
- [DMACH_SDI] = {
- .list = {
- [0] = 3 | DMA_CH_VALID,
- [1] = 2 | DMA_CH_VALID,
- [2] = 1 | DMA_CH_VALID,
- [3] = 0 | DMA_CH_VALID,
- },
- },
- [DMACH_I2S_IN] = {
- .list = {
- [0] = 1 | DMA_CH_VALID,
- [1] = 2 | DMA_CH_VALID,
- },
- },
- [DMACH_I2S_OUT] = {
- .list = {
- [0] = 2 | DMA_CH_VALID,
- [1] = 1 | DMA_CH_VALID,
- },
- },
- [DMACH_PCM_IN] = {
- .list = {
- [0] = 2 | DMA_CH_VALID,
- [1] = 1 | DMA_CH_VALID,
- },
- },
- [DMACH_PCM_OUT] = {
- .list = {
- [0] = 1 | DMA_CH_VALID,
- [1] = 3 | DMA_CH_VALID,
- },
- },
- [DMACH_MIC_IN] = {
- .list = {
- [0] = 3 | DMA_CH_VALID,
- [1] = 2 | DMA_CH_VALID,
- },
- },
- },
-};
-
-static int __init s3c2440_dma_add(struct device *dev,
- struct subsys_interface *sif)
-{
- s3c2410_dma_init();
- s3c24xx_dma_order_set(&s3c2440_dma_order);
- return s3c24xx_dma_init_map(&s3c2440_dma_sel);
-}
-
-static struct subsys_interface s3c2440_dma_interface = {
- .name = "s3c2440_dma",
- .subsys = &s3c2440_subsys,
- .add_dev = s3c2440_dma_add,
-};
-
-static int __init s3c2440_dma_init(void)
-{
- return subsys_interface_register(&s3c2440_dma_interface);
-}
-
-arch_initcall(s3c2440_dma_init);
-
+++ /dev/null
-/* linux/arch/arm/mach-s3c2443/dma.c
- *
- * Copyright (c) 2007 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2443 DMA selection
- *
- * http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/serial_core.h>
-#include <linux/serial_s3c.h>
-#include <linux/io.h>
-
-#include <mach/dma.h>
-
-#include <plat/dma-s3c24xx.h>
-#include <plat/cpu.h>
-
-#include <mach/regs-gpio.h>
-#include <plat/regs-dma.h>
-#include <mach/regs-lcd.h>
-#include <plat/regs-spi.h>
-
-#define MAP(x) { \
- [0] = (x) | DMA_CH_VALID, \
- [1] = (x) | DMA_CH_VALID, \
- [2] = (x) | DMA_CH_VALID, \
- [3] = (x) | DMA_CH_VALID, \
- [4] = (x) | DMA_CH_VALID, \
- [5] = (x) | DMA_CH_VALID, \
- }
-
-static struct s3c24xx_dma_map __initdata s3c2443_dma_mappings[] = {
- [DMACH_XD0] = {
- .name = "xdreq0",
- .channels = MAP(S3C2443_DMAREQSEL_XDREQ0),
- },
- [DMACH_XD1] = {
- .name = "xdreq1",
- .channels = MAP(S3C2443_DMAREQSEL_XDREQ1),
- },
- [DMACH_SDI] = { /* only on S3C2443 */
- .name = "sdi",
- .channels = MAP(S3C2443_DMAREQSEL_SDI),
- },
- [DMACH_SPI0_RX] = {
- .name = "spi0-rx",
- .channels = MAP(S3C2443_DMAREQSEL_SPI0RX),
- },
- [DMACH_SPI0_TX] = {
- .name = "spi0-tx",
- .channels = MAP(S3C2443_DMAREQSEL_SPI0TX),
- },
- [DMACH_SPI1_RX] = { /* only on S3C2443/S3C2450 */
- .name = "spi1-rx",
- .channels = MAP(S3C2443_DMAREQSEL_SPI1RX),
- },
- [DMACH_SPI1_TX] = { /* only on S3C2443/S3C2450 */
- .name = "spi1-tx",
- .channels = MAP(S3C2443_DMAREQSEL_SPI1TX),
- },
- [DMACH_UART0] = {
- .name = "uart0",
- .channels = MAP(S3C2443_DMAREQSEL_UART0_0),
- },
- [DMACH_UART1] = {
- .name = "uart1",
- .channels = MAP(S3C2443_DMAREQSEL_UART1_0),
- },
- [DMACH_UART2] = {
- .name = "uart2",
- .channels = MAP(S3C2443_DMAREQSEL_UART2_0),
- },
- [DMACH_UART3] = {
- .name = "uart3",
- .channels = MAP(S3C2443_DMAREQSEL_UART3_0),
- },
- [DMACH_UART0_SRC2] = {
- .name = "uart0",
- .channels = MAP(S3C2443_DMAREQSEL_UART0_1),
- },
- [DMACH_UART1_SRC2] = {
- .name = "uart1",
- .channels = MAP(S3C2443_DMAREQSEL_UART1_1),
- },
- [DMACH_UART2_SRC2] = {
- .name = "uart2",
- .channels = MAP(S3C2443_DMAREQSEL_UART2_1),
- },
- [DMACH_UART3_SRC2] = {
- .name = "uart3",
- .channels = MAP(S3C2443_DMAREQSEL_UART3_1),
- },
- [DMACH_TIMER] = {
- .name = "timer",
- .channels = MAP(S3C2443_DMAREQSEL_TIMER),
- },
- [DMACH_I2S_IN] = {
- .name = "i2s-sdi",
- .channels = MAP(S3C2443_DMAREQSEL_I2SRX),
- },
- [DMACH_I2S_OUT] = {
- .name = "i2s-sdo",
- .channels = MAP(S3C2443_DMAREQSEL_I2STX),
- },
- [DMACH_PCM_IN] = {
- .name = "pcm-in",
- .channels = MAP(S3C2443_DMAREQSEL_PCMIN),
- },
- [DMACH_PCM_OUT] = {
- .name = "pcm-out",
- .channels = MAP(S3C2443_DMAREQSEL_PCMOUT),
- },
- [DMACH_MIC_IN] = {
- .name = "mic-in",
- .channels = MAP(S3C2443_DMAREQSEL_MICIN),
- },
-};
-
-static void s3c2443_dma_select(struct s3c2410_dma_chan *chan,
- struct s3c24xx_dma_map *map)
-{
- unsigned long chsel = map->channels[0] & (~DMA_CH_VALID);
- writel(chsel | S3C2443_DMAREQSEL_HW,
- chan->regs + S3C2443_DMA_DMAREQSEL);
-}
-
-static struct s3c24xx_dma_selection __initdata s3c2443_dma_sel = {
- .select = s3c2443_dma_select,
- .dcon_mask = 0,
- .map = s3c2443_dma_mappings,
- .map_size = ARRAY_SIZE(s3c2443_dma_mappings),
-};
-
-static int __init s3c2443_dma_add(struct device *dev,
- struct subsys_interface *sif)
-{
- s3c24xx_dma_init(6, IRQ_S3C2443_DMA0, 0x100);
- return s3c24xx_dma_init_map(&s3c2443_dma_sel);
-}
-
-#ifdef CONFIG_CPU_S3C2416
-/* S3C2416 DMA contains the same selection table as the S3C2443 */
-static struct subsys_interface s3c2416_dma_interface = {
- .name = "s3c2416_dma",
- .subsys = &s3c2416_subsys,
- .add_dev = s3c2443_dma_add,
-};
-
-static int __init s3c2416_dma_init(void)
-{
- return subsys_interface_register(&s3c2416_dma_interface);
-}
-
-arch_initcall(s3c2416_dma_init);
-#endif
-
-#ifdef CONFIG_CPU_S3C2443
-static struct subsys_interface s3c2443_dma_interface = {
- .name = "s3c2443_dma",
- .subsys = &s3c2443_subsys,
- .add_dev = s3c2443_dma_add,
-};
-
-static int __init s3c2443_dma_init(void)
-{
- return subsys_interface_register(&s3c2443_dma_interface);
-}
-
-arch_initcall(s3c2443_dma_init);
-#endif
+++ /dev/null
-/*
- * Copyright 2003-2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * S3C2410 DMA core
- *
- * http://armlinux.simtec.co.uk/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-
-#ifdef CONFIG_S3C2410_DMA_DEBUG
-#define DEBUG
-#endif
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/syscore_ops.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-
-#include <asm/irq.h>
-#include <mach/hardware.h>
-#include <mach/dma.h>
-#include <mach/map.h>
-
-#include <plat/dma-s3c24xx.h>
-#include <plat/regs-dma.h>
-
-/* io map for dma */
-static void __iomem *dma_base;
-static struct kmem_cache *dma_kmem;
-
-static int dma_channels;
-
-static struct s3c24xx_dma_selection dma_sel;
-
-
-/* debugging functions */
-
-#define BUF_MAGIC (0xcafebabe)
-
-#define dmawarn(fmt...) printk(KERN_DEBUG fmt)
-
-#define dma_regaddr(chan, reg) ((chan)->regs + (reg))
-
-#if 1
-#define dma_wrreg(chan, reg, val) writel((val), (chan)->regs + (reg))
-#else
-static inline void
-dma_wrreg(struct s3c2410_dma_chan *chan, int reg, unsigned long val)
-{
- pr_debug("writing %08x to register %08x\n",(unsigned int)val,reg);
- writel(val, dma_regaddr(chan, reg));
-}
-#endif
-
-#define dma_rdreg(chan, reg) readl((chan)->regs + (reg))
-
-/* captured register state for debug */
-
-struct s3c2410_dma_regstate {
- unsigned long dcsrc;
- unsigned long disrc;
- unsigned long dstat;
- unsigned long dcon;
- unsigned long dmsktrig;
-};
-
-#ifdef CONFIG_S3C2410_DMA_DEBUG
-
-/* dmadbg_showregs
- *
- * simple debug routine to print the current state of the dma registers
-*/
-
-static void
-dmadbg_capture(struct s3c2410_dma_chan *chan, struct s3c2410_dma_regstate *regs)
-{
- regs->dcsrc = dma_rdreg(chan, S3C2410_DMA_DCSRC);
- regs->disrc = dma_rdreg(chan, S3C2410_DMA_DISRC);
- regs->dstat = dma_rdreg(chan, S3C2410_DMA_DSTAT);
- regs->dcon = dma_rdreg(chan, S3C2410_DMA_DCON);
- regs->dmsktrig = dma_rdreg(chan, S3C2410_DMA_DMASKTRIG);
-}
-
-static void
-dmadbg_dumpregs(const char *fname, int line, struct s3c2410_dma_chan *chan,
- struct s3c2410_dma_regstate *regs)
-{
- printk(KERN_DEBUG "dma%d: %s:%d: DCSRC=%08lx, DISRC=%08lx, DSTAT=%08lx DMT=%02lx, DCON=%08lx\n",
- chan->number, fname, line,
- regs->dcsrc, regs->disrc, regs->dstat, regs->dmsktrig,
- regs->dcon);
-}
-
-static void
-dmadbg_showchan(const char *fname, int line, struct s3c2410_dma_chan *chan)
-{
- struct s3c2410_dma_regstate state;
-
- dmadbg_capture(chan, &state);
-
- printk(KERN_DEBUG "dma%d: %s:%d: ls=%d, cur=%p, %p %p\n",
- chan->number, fname, line, chan->load_state,
- chan->curr, chan->next, chan->end);
-
- dmadbg_dumpregs(fname, line, chan, &state);
-}
-
-static void
-dmadbg_showregs(const char *fname, int line, struct s3c2410_dma_chan *chan)
-{
- struct s3c2410_dma_regstate state;
-
- dmadbg_capture(chan, &state);
- dmadbg_dumpregs(fname, line, chan, &state);
-}
-
-#define dbg_showregs(chan) dmadbg_showregs(__func__, __LINE__, (chan))
-#define dbg_showchan(chan) dmadbg_showchan(__func__, __LINE__, (chan))
-#else
-#define dbg_showregs(chan) do { } while(0)
-#define dbg_showchan(chan) do { } while(0)
-#endif /* CONFIG_S3C2410_DMA_DEBUG */
-
-/* s3c2410_dma_stats_timeout
- *
- * Update DMA stats from timeout info
-*/
-
-static void
-s3c2410_dma_stats_timeout(struct s3c2410_dma_stats *stats, int val)
-{
- if (stats == NULL)
- return;
-
- if (val > stats->timeout_longest)
- stats->timeout_longest = val;
- if (val < stats->timeout_shortest)
- stats->timeout_shortest = val;
-
- stats->timeout_avg += val;
-}
-
-/* s3c2410_dma_waitforload
- *
- * wait for the DMA engine to load a buffer, and update the state accordingly
-*/
-
-static int
-s3c2410_dma_waitforload(struct s3c2410_dma_chan *chan, int line)
-{
- int timeout = chan->load_timeout;
- int took;
-
- if (chan->load_state != S3C2410_DMALOAD_1LOADED) {
- printk(KERN_ERR "dma%d: s3c2410_dma_waitforload() called in loadstate %d from line %d\n", chan->number, chan->load_state, line);
- return 0;
- }
-
- if (chan->stats != NULL)
- chan->stats->loads++;
-
- while (--timeout > 0) {
- if ((dma_rdreg(chan, S3C2410_DMA_DSTAT) << (32-20)) != 0) {
- took = chan->load_timeout - timeout;
-
- s3c2410_dma_stats_timeout(chan->stats, took);
-
- switch (chan->load_state) {
- case S3C2410_DMALOAD_1LOADED:
- chan->load_state = S3C2410_DMALOAD_1RUNNING;
- break;
-
- default:
- printk(KERN_ERR "dma%d: unknown load_state in s3c2410_dma_waitforload() %d\n", chan->number, chan->load_state);
- }
-
- return 1;
- }
- }
-
- if (chan->stats != NULL) {
- chan->stats->timeout_failed++;
- }
-
- return 0;
-}
-
-/* s3c2410_dma_loadbuffer
- *
- * load a buffer, and update the channel state
-*/
-
-static inline int
-s3c2410_dma_loadbuffer(struct s3c2410_dma_chan *chan,
- struct s3c2410_dma_buf *buf)
-{
- unsigned long reload;
-
- if (buf == NULL) {
- dmawarn("buffer is NULL\n");
- return -EINVAL;
- }
-
- pr_debug("s3c2410_chan_loadbuffer: loading buff %p (0x%08lx,0x%06x)\n",
- buf, (unsigned long)buf->data, buf->size);
-
- /* check the state of the channel before we do anything */
-
- if (chan->load_state == S3C2410_DMALOAD_1LOADED) {
- dmawarn("load_state is S3C2410_DMALOAD_1LOADED\n");
- }
-
- if (chan->load_state == S3C2410_DMALOAD_1LOADED_1RUNNING) {
- dmawarn("state is S3C2410_DMALOAD_1LOADED_1RUNNING\n");
- }
-
- /* it would seem sensible if we are the last buffer to not bother
- * with the auto-reload bit, so that the DMA engine will not try
- * and load another transfer after this one has finished...
- */
- if (chan->load_state == S3C2410_DMALOAD_NONE) {
- pr_debug("load_state is none, checking for noreload (next=%p)\n",
- buf->next);
- reload = (buf->next == NULL) ? S3C2410_DCON_NORELOAD : 0;
- } else {
- //pr_debug("load_state is %d => autoreload\n", chan->load_state);
- reload = S3C2410_DCON_AUTORELOAD;
- }
-
- if ((buf->data & 0xf0000000) != 0x30000000) {
- dmawarn("dmaload: buffer is %p\n", (void *)buf->data);
- }
-
- writel(buf->data, chan->addr_reg);
-
- dma_wrreg(chan, S3C2410_DMA_DCON,
- chan->dcon | reload | (buf->size/chan->xfer_unit));
-
- chan->next = buf->next;
-
- /* update the state of the channel */
-
- switch (chan->load_state) {
- case S3C2410_DMALOAD_NONE:
- chan->load_state = S3C2410_DMALOAD_1LOADED;
- break;
-
- case S3C2410_DMALOAD_1RUNNING:
- chan->load_state = S3C2410_DMALOAD_1LOADED_1RUNNING;
- break;
-
- default:
- dmawarn("dmaload: unknown state %d in loadbuffer\n",
- chan->load_state);
- break;
- }
-
- return 0;
-}
-
-/* s3c2410_dma_call_op
- *
- * small routine to call the op routine with the given op if it has been
- * registered
-*/
-
-static void
-s3c2410_dma_call_op(struct s3c2410_dma_chan *chan, enum s3c2410_chan_op op)
-{
- if (chan->op_fn != NULL) {
- (chan->op_fn)(chan, op);
- }
-}
-
-/* s3c2410_dma_buffdone
- *
- * small wrapper to check if callback routine needs to be called, and
- * if so, call it
-*/
-
-static inline void
-s3c2410_dma_buffdone(struct s3c2410_dma_chan *chan, struct s3c2410_dma_buf *buf,
- enum s3c2410_dma_buffresult result)
-{
-#if 0
- pr_debug("callback_fn=%p, buf=%p, id=%p, size=%d, result=%d\n",
- chan->callback_fn, buf, buf->id, buf->size, result);
-#endif
-
- if (chan->callback_fn != NULL) {
- (chan->callback_fn)(chan, buf->id, buf->size, result);
- }
-}
-
-/* s3c2410_dma_start
- *
- * start a dma channel going
-*/
-
-static int s3c2410_dma_start(struct s3c2410_dma_chan *chan)
-{
- unsigned long tmp;
- unsigned long flags;
-
- pr_debug("s3c2410_start_dma: channel=%d\n", chan->number);
-
- local_irq_save(flags);
-
- if (chan->state == S3C2410_DMA_RUNNING) {
- pr_debug("s3c2410_start_dma: already running (%d)\n", chan->state);
- local_irq_restore(flags);
- return 0;
- }
-
- chan->state = S3C2410_DMA_RUNNING;
-
- /* check whether there is anything to load, and if not, see
- * if we can find anything to load
- */
-
- if (chan->load_state == S3C2410_DMALOAD_NONE) {
- if (chan->next == NULL) {
- printk(KERN_ERR "dma%d: channel has nothing loaded\n",
- chan->number);
- chan->state = S3C2410_DMA_IDLE;
- local_irq_restore(flags);
- return -EINVAL;
- }
-
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
-
- dbg_showchan(chan);
-
- /* enable the channel */
-
- if (!chan->irq_enabled) {
- enable_irq(chan->irq);
- chan->irq_enabled = 1;
- }
-
- /* start the channel going */
-
- tmp = dma_rdreg(chan, S3C2410_DMA_DMASKTRIG);
- tmp &= ~S3C2410_DMASKTRIG_STOP;
- tmp |= S3C2410_DMASKTRIG_ON;
- dma_wrreg(chan, S3C2410_DMA_DMASKTRIG, tmp);
-
- pr_debug("dma%d: %08lx to DMASKTRIG\n", chan->number, tmp);
-
-#if 0
- /* the dma buffer loads should take care of clearing the AUTO
- * reloading feature */
- tmp = dma_rdreg(chan, S3C2410_DMA_DCON);
- tmp &= ~S3C2410_DCON_NORELOAD;
- dma_wrreg(chan, S3C2410_DMA_DCON, tmp);
-#endif
-
- s3c2410_dma_call_op(chan, S3C2410_DMAOP_START);
-
- dbg_showchan(chan);
-
- /* if we've only loaded one buffer onto the channel, then chec
- * to see if we have another, and if so, try and load it so when
- * the first buffer is finished, the new one will be loaded onto
- * the channel */
-
- if (chan->next != NULL) {
- if (chan->load_state == S3C2410_DMALOAD_1LOADED) {
-
- if (s3c2410_dma_waitforload(chan, __LINE__) == 0) {
- pr_debug("%s: buff not yet loaded, no more todo\n",
- __func__);
- } else {
- chan->load_state = S3C2410_DMALOAD_1RUNNING;
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
-
- } else if (chan->load_state == S3C2410_DMALOAD_1RUNNING) {
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
- }
-
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-/* s3c2410_dma_canload
- *
- * work out if we can queue another buffer into the DMA engine
-*/
-
-static int
-s3c2410_dma_canload(struct s3c2410_dma_chan *chan)
-{
- if (chan->load_state == S3C2410_DMALOAD_NONE ||
- chan->load_state == S3C2410_DMALOAD_1RUNNING)
- return 1;
-
- return 0;
-}
-
-/* s3c2410_dma_enqueue
- *
- * queue an given buffer for dma transfer.
- *
- * id the device driver's id information for this buffer
- * data the physical address of the buffer data
- * size the size of the buffer in bytes
- *
- * If the channel is not running, then the flag S3C2410_DMAF_AUTOSTART
- * is checked, and if set, the channel is started. If this flag isn't set,
- * then an error will be returned.
- *
- * It is possible to queue more than one DMA buffer onto a channel at
- * once, and the code will deal with the re-loading of the next buffer
- * when necessary.
-*/
-
-int s3c2410_dma_enqueue(enum dma_ch channel, void *id,
- dma_addr_t data, int size)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
- struct s3c2410_dma_buf *buf;
- unsigned long flags;
-
- if (chan == NULL)
- return -EINVAL;
-
- pr_debug("%s: id=%p, data=%08x, size=%d\n",
- __func__, id, (unsigned int)data, size);
-
- buf = kmem_cache_alloc(dma_kmem, GFP_ATOMIC);
- if (buf == NULL) {
- pr_debug("%s: out of memory (%ld alloc)\n",
- __func__, (long)sizeof(*buf));
- return -ENOMEM;
- }
-
- //pr_debug("%s: new buffer %p\n", __func__, buf);
- //dbg_showchan(chan);
-
- buf->next = NULL;
- buf->data = buf->ptr = data;
- buf->size = size;
- buf->id = id;
- buf->magic = BUF_MAGIC;
-
- local_irq_save(flags);
-
- if (chan->curr == NULL) {
- /* we've got nothing loaded... */
- pr_debug("%s: buffer %p queued onto empty channel\n",
- __func__, buf);
-
- chan->curr = buf;
- chan->end = buf;
- chan->next = NULL;
- } else {
- pr_debug("dma%d: %s: buffer %p queued onto non-empty channel\n",
- chan->number, __func__, buf);
-
- if (chan->end == NULL) {
- pr_debug("dma%d: %s: %p not empty, and chan->end==NULL?\n",
- chan->number, __func__, chan);
- } else {
- chan->end->next = buf;
- chan->end = buf;
- }
- }
-
- /* if necessary, update the next buffer field */
- if (chan->next == NULL)
- chan->next = buf;
-
- /* check to see if we can load a buffer */
- if (chan->state == S3C2410_DMA_RUNNING) {
- if (chan->load_state == S3C2410_DMALOAD_1LOADED && 1) {
- if (s3c2410_dma_waitforload(chan, __LINE__) == 0) {
- printk(KERN_ERR "dma%d: loadbuffer:"
- "timeout loading buffer\n",
- chan->number);
- dbg_showchan(chan);
- local_irq_restore(flags);
- return -EINVAL;
- }
- }
-
- while (s3c2410_dma_canload(chan) && chan->next != NULL) {
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
- } else if (chan->state == S3C2410_DMA_IDLE) {
- if (chan->flags & S3C2410_DMAF_AUTOSTART) {
- s3c2410_dma_ctrl(chan->number | DMACH_LOW_LEVEL,
- S3C2410_DMAOP_START);
- }
- }
-
- local_irq_restore(flags);
- return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_enqueue);
-
-static inline void
-s3c2410_dma_freebuf(struct s3c2410_dma_buf *buf)
-{
- int magicok = (buf->magic == BUF_MAGIC);
-
- buf->magic = -1;
-
- if (magicok) {
- kmem_cache_free(dma_kmem, buf);
- } else {
- printk("s3c2410_dma_freebuf: buff %p with bad magic\n", buf);
- }
-}
-
-/* s3c2410_dma_lastxfer
- *
- * called when the system is out of buffers, to ensure that the channel
- * is prepared for shutdown.
-*/
-
-static inline void
-s3c2410_dma_lastxfer(struct s3c2410_dma_chan *chan)
-{
-#if 0
- pr_debug("dma%d: s3c2410_dma_lastxfer: load_state %d\n",
- chan->number, chan->load_state);
-#endif
-
- switch (chan->load_state) {
- case S3C2410_DMALOAD_NONE:
- break;
-
- case S3C2410_DMALOAD_1LOADED:
- if (s3c2410_dma_waitforload(chan, __LINE__) == 0) {
- /* flag error? */
- printk(KERN_ERR "dma%d: timeout waiting for load (%s)\n",
- chan->number, __func__);
- return;
- }
- break;
-
- case S3C2410_DMALOAD_1LOADED_1RUNNING:
- /* I believe in this case we do not have anything to do
- * until the next buffer comes along, and we turn off the
- * reload */
- return;
-
- default:
- pr_debug("dma%d: lastxfer: unhandled load_state %d with no next\n",
- chan->number, chan->load_state);
- return;
-
- }
-
- /* hopefully this'll shut the damned thing up after the transfer... */
- dma_wrreg(chan, S3C2410_DMA_DCON, chan->dcon | S3C2410_DCON_NORELOAD);
-}
-
-
-#define dmadbg2(x...)
-
-static irqreturn_t
-s3c2410_dma_irq(int irq, void *devpw)
-{
- struct s3c2410_dma_chan *chan = (struct s3c2410_dma_chan *)devpw;
- struct s3c2410_dma_buf *buf;
-
- buf = chan->curr;
-
- dbg_showchan(chan);
-
- /* modify the channel state */
-
- switch (chan->load_state) {
- case S3C2410_DMALOAD_1RUNNING:
- /* TODO - if we are running only one buffer, we probably
- * want to reload here, and then worry about the buffer
- * callback */
-
- chan->load_state = S3C2410_DMALOAD_NONE;
- break;
-
- case S3C2410_DMALOAD_1LOADED:
- /* iirc, we should go back to NONE loaded here, we
- * had a buffer, and it was never verified as being
- * loaded.
- */
-
- chan->load_state = S3C2410_DMALOAD_NONE;
- break;
-
- case S3C2410_DMALOAD_1LOADED_1RUNNING:
- /* we'll worry about checking to see if another buffer is
- * ready after we've called back the owner. This should
- * ensure we do not wait around too long for the DMA
- * engine to start the next transfer
- */
-
- chan->load_state = S3C2410_DMALOAD_1LOADED;
- break;
-
- case S3C2410_DMALOAD_NONE:
- printk(KERN_ERR "dma%d: IRQ with no loaded buffer?\n",
- chan->number);
- break;
-
- default:
- printk(KERN_ERR "dma%d: IRQ in invalid load_state %d\n",
- chan->number, chan->load_state);
- break;
- }
-
- if (buf != NULL) {
- /* update the chain to make sure that if we load any more
- * buffers when we call the callback function, things should
- * work properly */
-
- chan->curr = buf->next;
- buf->next = NULL;
-
- if (buf->magic != BUF_MAGIC) {
- printk(KERN_ERR "dma%d: %s: buf %p incorrect magic\n",
- chan->number, __func__, buf);
- return IRQ_HANDLED;
- }
-
- s3c2410_dma_buffdone(chan, buf, S3C2410_RES_OK);
-
- /* free resouces */
- s3c2410_dma_freebuf(buf);
- } else {
- }
-
- /* only reload if the channel is still running... our buffer done
- * routine may have altered the state by requesting the dma channel
- * to stop or shutdown... */
-
- /* todo: check that when the channel is shut-down from inside this
- * function, we cope with unsetting reload, etc */
-
- if (chan->next != NULL && chan->state != S3C2410_DMA_IDLE) {
- unsigned long flags;
-
- switch (chan->load_state) {
- case S3C2410_DMALOAD_1RUNNING:
- /* don't need to do anything for this state */
- break;
-
- case S3C2410_DMALOAD_NONE:
- /* can load buffer immediately */
- break;
-
- case S3C2410_DMALOAD_1LOADED:
- if (s3c2410_dma_waitforload(chan, __LINE__) == 0) {
- /* flag error? */
- printk(KERN_ERR "dma%d: timeout waiting for load (%s)\n",
- chan->number, __func__);
- return IRQ_HANDLED;
- }
-
- break;
-
- case S3C2410_DMALOAD_1LOADED_1RUNNING:
- goto no_load;
-
- default:
- printk(KERN_ERR "dma%d: unknown load_state in irq, %d\n",
- chan->number, chan->load_state);
- return IRQ_HANDLED;
- }
-
- local_irq_save(flags);
- s3c2410_dma_loadbuffer(chan, chan->next);
- local_irq_restore(flags);
- } else {
- s3c2410_dma_lastxfer(chan);
-
- /* see if we can stop this channel.. */
- if (chan->load_state == S3C2410_DMALOAD_NONE) {
- pr_debug("dma%d: end of transfer, stopping channel (%ld)\n",
- chan->number, jiffies);
- s3c2410_dma_ctrl(chan->number | DMACH_LOW_LEVEL,
- S3C2410_DMAOP_STOP);
- }
- }
-
- no_load:
- return IRQ_HANDLED;
-}
-
-static struct s3c2410_dma_chan *s3c2410_dma_map_channel(int channel);
-
-/* s3c2410_request_dma
- *
- * get control of an dma channel
-*/
-
-int s3c2410_dma_request(enum dma_ch channel,
- struct s3c2410_dma_client *client,
- void *dev)
-{
- struct s3c2410_dma_chan *chan;
- unsigned long flags;
- int err;
-
- pr_debug("dma%d: s3c2410_request_dma: client=%s, dev=%p\n",
- channel, client->name, dev);
-
- local_irq_save(flags);
-
- chan = s3c2410_dma_map_channel(channel);
- if (chan == NULL) {
- local_irq_restore(flags);
- return -EBUSY;
- }
-
- dbg_showchan(chan);
-
- chan->client = client;
- chan->in_use = 1;
-
- if (!chan->irq_claimed) {
- pr_debug("dma%d: %s : requesting irq %d\n",
- channel, __func__, chan->irq);
-
- chan->irq_claimed = 1;
- local_irq_restore(flags);
-
- err = request_irq(chan->irq, s3c2410_dma_irq, 0,
- client->name, (void *)chan);
-
- local_irq_save(flags);
-
- if (err) {
- chan->in_use = 0;
- chan->irq_claimed = 0;
- local_irq_restore(flags);
-
- printk(KERN_ERR "%s: cannot get IRQ %d for DMA %d\n",
- client->name, chan->irq, chan->number);
- return err;
- }
-
- chan->irq_enabled = 1;
- }
-
- local_irq_restore(flags);
-
- /* need to setup */
-
- pr_debug("%s: channel initialised, %p\n", __func__, chan);
-
- return chan->number | DMACH_LOW_LEVEL;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_request);
-
-/* s3c2410_dma_free
- *
- * release the given channel back to the system, will stop and flush
- * any outstanding transfers, and ensure the channel is ready for the
- * next claimant.
- *
- * Note, although a warning is currently printed if the freeing client
- * info is not the same as the registrant's client info, the free is still
- * allowed to go through.
-*/
-
-int s3c2410_dma_free(enum dma_ch channel, struct s3c2410_dma_client *client)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
- unsigned long flags;
-
- if (chan == NULL)
- return -EINVAL;
-
- local_irq_save(flags);
-
- if (chan->client != client) {
- printk(KERN_WARNING "dma%d: possible free from different client (channel %p, passed %p)\n",
- channel, chan->client, client);
- }
-
- /* sort out stopping and freeing the channel */
-
- if (chan->state != S3C2410_DMA_IDLE) {
- pr_debug("%s: need to stop dma channel %p\n",
- __func__, chan);
-
- /* possibly flush the channel */
- s3c2410_dma_ctrl(channel, S3C2410_DMAOP_STOP);
- }
-
- chan->client = NULL;
- chan->in_use = 0;
-
- if (chan->irq_claimed)
- free_irq(chan->irq, (void *)chan);
-
- chan->irq_claimed = 0;
-
- if (!(channel & DMACH_LOW_LEVEL))
- s3c_dma_chan_map[channel] = NULL;
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_free);
-
-static int s3c2410_dma_dostop(struct s3c2410_dma_chan *chan)
-{
- unsigned long flags;
- unsigned long tmp;
-
- pr_debug("%s:\n", __func__);
-
- dbg_showchan(chan);
-
- local_irq_save(flags);
-
- s3c2410_dma_call_op(chan, S3C2410_DMAOP_STOP);
-
- tmp = dma_rdreg(chan, S3C2410_DMA_DMASKTRIG);
- tmp |= S3C2410_DMASKTRIG_STOP;
- //tmp &= ~S3C2410_DMASKTRIG_ON;
- dma_wrreg(chan, S3C2410_DMA_DMASKTRIG, tmp);
-
-#if 0
- /* should also clear interrupts, according to WinCE BSP */
- tmp = dma_rdreg(chan, S3C2410_DMA_DCON);
- tmp |= S3C2410_DCON_NORELOAD;
- dma_wrreg(chan, S3C2410_DMA_DCON, tmp);
-#endif
-
- /* should stop do this, or should we wait for flush? */
- chan->state = S3C2410_DMA_IDLE;
- chan->load_state = S3C2410_DMALOAD_NONE;
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-static void s3c2410_dma_waitforstop(struct s3c2410_dma_chan *chan)
-{
- unsigned long tmp;
- unsigned int timeout = 0x10000;
-
- while (timeout-- > 0) {
- tmp = dma_rdreg(chan, S3C2410_DMA_DMASKTRIG);
-
- if (!(tmp & S3C2410_DMASKTRIG_ON))
- return;
- }
-
- pr_debug("dma%d: failed to stop?\n", chan->number);
-}
-
-
-/* s3c2410_dma_flush
- *
- * stop the channel, and remove all current and pending transfers
-*/
-
-static int s3c2410_dma_flush(struct s3c2410_dma_chan *chan)
-{
- struct s3c2410_dma_buf *buf, *next;
- unsigned long flags;
-
- pr_debug("%s: chan %p (%d)\n", __func__, chan, chan->number);
-
- dbg_showchan(chan);
-
- local_irq_save(flags);
-
- if (chan->state != S3C2410_DMA_IDLE) {
- pr_debug("%s: stopping channel...\n", __func__ );
- s3c2410_dma_ctrl(chan->number, S3C2410_DMAOP_STOP);
- }
-
- buf = chan->curr;
- if (buf == NULL)
- buf = chan->next;
-
- chan->curr = chan->next = chan->end = NULL;
-
- if (buf != NULL) {
- for ( ; buf != NULL; buf = next) {
- next = buf->next;
-
- pr_debug("%s: free buffer %p, next %p\n",
- __func__, buf, buf->next);
-
- s3c2410_dma_buffdone(chan, buf, S3C2410_RES_ABORT);
- s3c2410_dma_freebuf(buf);
- }
- }
-
- dbg_showregs(chan);
-
- s3c2410_dma_waitforstop(chan);
-
-#if 0
- /* should also clear interrupts, according to WinCE BSP */
- {
- unsigned long tmp;
-
- tmp = dma_rdreg(chan, S3C2410_DMA_DCON);
- tmp |= S3C2410_DCON_NORELOAD;
- dma_wrreg(chan, S3C2410_DMA_DCON, tmp);
- }
-#endif
-
- dbg_showregs(chan);
-
- local_irq_restore(flags);
-
- return 0;
-}
-
-static int s3c2410_dma_started(struct s3c2410_dma_chan *chan)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
- dbg_showchan(chan);
-
- /* if we've only loaded one buffer onto the channel, then chec
- * to see if we have another, and if so, try and load it so when
- * the first buffer is finished, the new one will be loaded onto
- * the channel */
-
- if (chan->next != NULL) {
- if (chan->load_state == S3C2410_DMALOAD_1LOADED) {
-
- if (s3c2410_dma_waitforload(chan, __LINE__) == 0) {
- pr_debug("%s: buff not yet loaded, no more todo\n",
- __func__);
- } else {
- chan->load_state = S3C2410_DMALOAD_1RUNNING;
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
-
- } else if (chan->load_state == S3C2410_DMALOAD_1RUNNING) {
- s3c2410_dma_loadbuffer(chan, chan->next);
- }
- }
-
-
- local_irq_restore(flags);
-
- return 0;
-
-}
-
-int
-s3c2410_dma_ctrl(enum dma_ch channel, enum s3c2410_chan_op op)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
-
- if (chan == NULL)
- return -EINVAL;
-
- switch (op) {
- case S3C2410_DMAOP_START:
- return s3c2410_dma_start(chan);
-
- case S3C2410_DMAOP_STOP:
- return s3c2410_dma_dostop(chan);
-
- case S3C2410_DMAOP_PAUSE:
- case S3C2410_DMAOP_RESUME:
- return -ENOENT;
-
- case S3C2410_DMAOP_FLUSH:
- return s3c2410_dma_flush(chan);
-
- case S3C2410_DMAOP_STARTED:
- return s3c2410_dma_started(chan);
-
- case S3C2410_DMAOP_TIMEOUT:
- return 0;
-
- }
-
- return -ENOENT; /* unknown, don't bother */
-}
-
-EXPORT_SYMBOL(s3c2410_dma_ctrl);
-
-/* DMA configuration for each channel
- *
- * DISRCC -> source of the DMA (AHB,APB)
- * DISRC -> source address of the DMA
- * DIDSTC -> destination of the DMA (AHB,APD)
- * DIDST -> destination address of the DMA
-*/
-
-/* s3c2410_dma_config
- *
- * xfersize: size of unit in bytes (1,2,4)
-*/
-
-int s3c2410_dma_config(enum dma_ch channel,
- int xferunit)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
- unsigned int dcon;
-
- pr_debug("%s: chan=%d, xfer_unit=%d\n", __func__, channel, xferunit);
-
- if (chan == NULL)
- return -EINVAL;
-
- dcon = chan->dcon & dma_sel.dcon_mask;
- pr_debug("%s: dcon is %08x\n", __func__, dcon);
-
- switch (chan->req_ch) {
- case DMACH_I2S_IN:
- case DMACH_I2S_OUT:
- case DMACH_PCM_IN:
- case DMACH_PCM_OUT:
- case DMACH_MIC_IN:
- default:
- dcon |= S3C2410_DCON_HANDSHAKE;
- dcon |= S3C2410_DCON_SYNC_PCLK;
- break;
-
- case DMACH_SDI:
- /* note, ensure if need HANDSHAKE or not */
- dcon |= S3C2410_DCON_SYNC_PCLK;
- break;
-
- case DMACH_XD0:
- case DMACH_XD1:
- dcon |= S3C2410_DCON_HANDSHAKE;
- dcon |= S3C2410_DCON_SYNC_HCLK;
- break;
- }
-
- switch (xferunit) {
- case 1:
- dcon |= S3C2410_DCON_BYTE;
- break;
-
- case 2:
- dcon |= S3C2410_DCON_HALFWORD;
- break;
-
- case 4:
- dcon |= S3C2410_DCON_WORD;
- break;
-
- default:
- pr_debug("%s: bad transfer size %d\n", __func__, xferunit);
- return -EINVAL;
- }
-
- dcon |= S3C2410_DCON_HWTRIG;
- dcon |= S3C2410_DCON_INTREQ;
-
- pr_debug("%s: dcon now %08x\n", __func__, dcon);
-
- chan->dcon = dcon;
- chan->xfer_unit = xferunit;
-
- return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_config);
-
-
-/* s3c2410_dma_devconfig
- *
- * configure the dma source/destination hardware type and address
- *
- * source: DMA_FROM_DEVICE: source is hardware
- * DMA_TO_DEVICE: source is memory
- *
- * devaddr: physical address of the source
-*/
-
-int s3c2410_dma_devconfig(enum dma_ch channel,
- enum dma_data_direction source,
- unsigned long devaddr)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
- unsigned int hwcfg;
-
- if (chan == NULL)
- return -EINVAL;
-
- pr_debug("%s: source=%d, devaddr=%08lx\n",
- __func__, (int)source, devaddr);
-
- chan->source = source;
- chan->dev_addr = devaddr;
-
- switch (chan->req_ch) {
- case DMACH_XD0:
- case DMACH_XD1:
- hwcfg = 0; /* AHB */
- break;
-
- default:
- hwcfg = S3C2410_DISRCC_APB;
- }
-
- /* always assume our peripheral desintation is a fixed
- * address in memory. */
- hwcfg |= S3C2410_DISRCC_INC;
-
- switch (source) {
- case DMA_FROM_DEVICE:
- /* source is hardware */
- pr_debug("%s: hw source, devaddr=%08lx, hwcfg=%d\n",
- __func__, devaddr, hwcfg);
- dma_wrreg(chan, S3C2410_DMA_DISRCC, hwcfg & 3);
- dma_wrreg(chan, S3C2410_DMA_DISRC, devaddr);
- dma_wrreg(chan, S3C2410_DMA_DIDSTC, (0<<1) | (0<<0));
-
- chan->addr_reg = dma_regaddr(chan, S3C2410_DMA_DIDST);
- break;
-
- case DMA_TO_DEVICE:
- /* source is memory */
- pr_debug("%s: mem source, devaddr=%08lx, hwcfg=%d\n",
- __func__, devaddr, hwcfg);
- dma_wrreg(chan, S3C2410_DMA_DISRCC, (0<<1) | (0<<0));
- dma_wrreg(chan, S3C2410_DMA_DIDST, devaddr);
- dma_wrreg(chan, S3C2410_DMA_DIDSTC, hwcfg & 3);
-
- chan->addr_reg = dma_regaddr(chan, S3C2410_DMA_DISRC);
- break;
-
- default:
- printk(KERN_ERR "dma%d: invalid source type (%d)\n",
- channel, source);
-
- return -EINVAL;
- }
-
- return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_devconfig);
-
-/* s3c2410_dma_getposition
- *
- * returns the current transfer points for the dma source and destination
-*/
-
-int s3c2410_dma_getposition(enum dma_ch channel, dma_addr_t *src, dma_addr_t *dst)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
-
- if (chan == NULL)
- return -EINVAL;
-
- if (src != NULL)
- *src = dma_rdreg(chan, S3C2410_DMA_DCSRC);
-
- if (dst != NULL)
- *dst = dma_rdreg(chan, S3C2410_DMA_DCDST);
-
- return 0;
-}
-
-EXPORT_SYMBOL(s3c2410_dma_getposition);
-
-/* system core operations */
-
-#ifdef CONFIG_PM
-
-static void s3c2410_dma_suspend_chan(struct s3c2410_dma_chan *cp)
-{
- printk(KERN_DEBUG "suspending dma channel %d\n", cp->number);
-
- if (dma_rdreg(cp, S3C2410_DMA_DMASKTRIG) & S3C2410_DMASKTRIG_ON) {
- /* the dma channel is still working, which is probably
- * a bad thing to do over suspend/resume. We stop the
- * channel and assume that the client is either going to
- * retry after resume, or that it is broken.
- */
-
- printk(KERN_INFO "dma: stopping channel %d due to suspend\n",
- cp->number);
-
- s3c2410_dma_dostop(cp);
- }
-}
-
-static int s3c2410_dma_suspend(void)
-{
- struct s3c2410_dma_chan *cp = s3c2410_chans;
- int channel;
-
- for (channel = 0; channel < dma_channels; cp++, channel++)
- s3c2410_dma_suspend_chan(cp);
-
- return 0;
-}
-
-static void s3c2410_dma_resume_chan(struct s3c2410_dma_chan *cp)
-{
- unsigned int no = cp->number | DMACH_LOW_LEVEL;
-
- /* restore channel's hardware configuration */
-
- if (!cp->in_use)
- return;
-
- printk(KERN_INFO "dma%d: restoring configuration\n", cp->number);
-
- s3c2410_dma_config(no, cp->xfer_unit);
- s3c2410_dma_devconfig(no, cp->source, cp->dev_addr);
-
- /* re-select the dma source for this channel */
-
- if (cp->map != NULL)
- dma_sel.select(cp, cp->map);
-}
-
-static void s3c2410_dma_resume(void)
-{
- struct s3c2410_dma_chan *cp = s3c2410_chans + dma_channels - 1;
- int channel;
-
- for (channel = dma_channels - 1; channel >= 0; cp--, channel--)
- s3c2410_dma_resume_chan(cp);
-}
-
-#else
-#define s3c2410_dma_suspend NULL
-#define s3c2410_dma_resume NULL
-#endif /* CONFIG_PM */
-
-struct syscore_ops dma_syscore_ops = {
- .suspend = s3c2410_dma_suspend,
- .resume = s3c2410_dma_resume,
-};
-
-/* kmem cache implementation */
-
-static void s3c2410_dma_cache_ctor(void *p)
-{
- memset(p, 0, sizeof(struct s3c2410_dma_buf));
-}
-
-/* initialisation code */
-
-static int __init s3c24xx_dma_syscore_init(void)
-{
- register_syscore_ops(&dma_syscore_ops);
-
- return 0;
-}
-
-late_initcall(s3c24xx_dma_syscore_init);
-
-int __init s3c24xx_dma_init(unsigned int channels, unsigned int irq,
- unsigned int stride)
-{
- struct s3c2410_dma_chan *cp;
- int channel;
- int ret;
-
- printk("S3C24XX DMA Driver, Copyright 2003-2006 Simtec Electronics\n");
-
- dma_channels = channels;
-
- dma_base = ioremap(S3C24XX_PA_DMA, stride * channels);
- if (dma_base == NULL) {
- printk(KERN_ERR "dma failed to remap register block\n");
- return -ENOMEM;
- }
-
- dma_kmem = kmem_cache_create("dma_desc",
- sizeof(struct s3c2410_dma_buf), 0,
- SLAB_HWCACHE_ALIGN,
- s3c2410_dma_cache_ctor);
-
- if (dma_kmem == NULL) {
- printk(KERN_ERR "dma failed to make kmem cache\n");
- ret = -ENOMEM;
- goto err;
- }
-
- for (channel = 0; channel < channels; channel++) {
- cp = &s3c2410_chans[channel];
-
- memset(cp, 0, sizeof(struct s3c2410_dma_chan));
-
- /* dma channel irqs are in order.. */
- cp->number = channel;
- cp->irq = channel + irq;
- cp->regs = dma_base + (channel * stride);
-
- /* point current stats somewhere */
- cp->stats = &cp->stats_store;
- cp->stats_store.timeout_shortest = LONG_MAX;
-
- /* basic channel configuration */
-
- cp->load_timeout = 1<<18;
-
- printk("DMA channel %d at %p, irq %d\n",
- cp->number, cp->regs, cp->irq);
- }
-
- return 0;
-
- err:
- kmem_cache_destroy(dma_kmem);
- iounmap(dma_base);
- dma_base = NULL;
- return ret;
-}
-
-int __init s3c2410_dma_init(void)
-{
- return s3c24xx_dma_init(4, IRQ_DMA0, 0x40);
-}
-
-static inline int is_channel_valid(unsigned int channel)
-{
- return (channel & DMA_CH_VALID);
-}
-
-static struct s3c24xx_dma_order *dma_order;
-
-
-/* s3c2410_dma_map_channel()
- *
- * turn the virtual channel number into a real, and un-used hardware
- * channel.
- *
- * first, try the dma ordering given to us by either the relevant
- * dma code, or the board. Then just find the first usable free
- * channel
-*/
-
-static struct s3c2410_dma_chan *s3c2410_dma_map_channel(int channel)
-{
- struct s3c24xx_dma_order_ch *ord = NULL;
- struct s3c24xx_dma_map *ch_map;
- struct s3c2410_dma_chan *dmach;
- int ch;
-
- if (dma_sel.map == NULL || channel > dma_sel.map_size)
- return NULL;
-
- ch_map = dma_sel.map + channel;
-
- /* first, try the board mapping */
-
- if (dma_order) {
- ord = &dma_order->channels[channel];
-
- for (ch = 0; ch < dma_channels; ch++) {
- int tmp;
- if (!is_channel_valid(ord->list[ch]))
- continue;
-
- tmp = ord->list[ch] & ~DMA_CH_VALID;
- if (s3c2410_chans[tmp].in_use == 0) {
- ch = tmp;
- goto found;
- }
- }
-
- if (ord->flags & DMA_CH_NEVER)
- return NULL;
- }
-
- /* second, search the channel map for first free */
-
- for (ch = 0; ch < dma_channels; ch++) {
- if (!is_channel_valid(ch_map->channels[ch]))
- continue;
-
- if (s3c2410_chans[ch].in_use == 0) {
- printk("mapped channel %d to %d\n", channel, ch);
- break;
- }
- }
-
- if (ch >= dma_channels)
- return NULL;
-
- /* update our channel mapping */
-
- found:
- dmach = &s3c2410_chans[ch];
- dmach->map = ch_map;
- dmach->req_ch = channel;
- s3c_dma_chan_map[channel] = dmach;
-
- /* select the channel */
-
- (dma_sel.select)(dmach, ch_map);
-
- return dmach;
-}
-
-static int s3c24xx_dma_check_entry(struct s3c24xx_dma_map *map, int ch)
-{
- return 0;
-}
-
-int __init s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel)
-{
- struct s3c24xx_dma_map *nmap;
- size_t map_sz = sizeof(*nmap) * sel->map_size;
- int ptr;
-
- nmap = kmemdup(sel->map, map_sz, GFP_KERNEL);
- if (nmap == NULL)
- return -ENOMEM;
-
- memcpy(&dma_sel, sel, sizeof(*sel));
-
- dma_sel.map = nmap;
-
- for (ptr = 0; ptr < sel->map_size; ptr++)
- s3c24xx_dma_check_entry(nmap+ptr, ptr);
-
- return 0;
-}
-
-int __init s3c24xx_dma_order_set(struct s3c24xx_dma_order *ord)
-{
- struct s3c24xx_dma_order *nord = dma_order;
-
- if (nord == NULL)
- nord = kmalloc(sizeof(struct s3c24xx_dma_order), GFP_KERNEL);
-
- if (nord == NULL) {
- printk(KERN_ERR "no memory to store dma channel order\n");
- return -ENOMEM;
- }
-
- dma_order = nord;
- memcpy(nord, ord, sizeof(struct s3c24xx_dma_order));
- return 0;
-}
#include <linux/device.h>
-#define MAX_DMA_TRANSFER_SIZE 0x100000 /* Data Unit is half word */
-
/* We use `virtual` dma channels to hide the fact we have only a limited
* number of DMA channels, and not of all of them (dependent on the device)
* can be attached to any DMA source. We therefore let the DMA core handle
DMACH_MAX, /* the end entry */
};
-static inline bool samsung_dma_has_circular(void)
-{
- return false;
-}
-
-static inline bool samsung_dma_is_dmadev(void)
-{
- return false;
-}
-
-#include <plat/dma.h>
-
-#define DMACH_LOW_LEVEL (1<<28) /* use this to specifiy hardware ch no */
-
-/* we have 4 dma channels */
-#if !defined(CONFIG_CPU_S3C2443) && !defined(CONFIG_CPU_S3C2416)
-#define S3C_DMA_CHANNELS (4)
-#else
-#define S3C_DMA_CHANNELS (6)
-#endif
-
-/* types */
-
-enum s3c2410_dma_state {
- S3C2410_DMA_IDLE,
- S3C2410_DMA_RUNNING,
- S3C2410_DMA_PAUSED
-};
-
-/* enum s3c2410_dma_loadst
- *
- * This represents the state of the DMA engine, wrt to the loaded / running
- * transfers. Since we don't have any way of knowing exactly the state of
- * the DMA transfers, we need to know the state to make decisions on whether
- * we can
- *
- * S3C2410_DMA_NONE
- *
- * There are no buffers loaded (the channel should be inactive)
- *
- * S3C2410_DMA_1LOADED
- *
- * There is one buffer loaded, however it has not been confirmed to be
- * loaded by the DMA engine. This may be because the channel is not
- * yet running, or the DMA driver decided that it was too costly to
- * sit and wait for it to happen.
- *
- * S3C2410_DMA_1RUNNING
- *
- * The buffer has been confirmed running, and not finisged
- *
- * S3C2410_DMA_1LOADED_1RUNNING
- *
- * There is a buffer waiting to be loaded by the DMA engine, and one
- * currently running.
-*/
-
-enum s3c2410_dma_loadst {
- S3C2410_DMALOAD_NONE,
- S3C2410_DMALOAD_1LOADED,
- S3C2410_DMALOAD_1RUNNING,
- S3C2410_DMALOAD_1LOADED_1RUNNING,
-};
-
-
-/* flags */
-
-#define S3C2410_DMAF_SLOW (1<<0) /* slow, so don't worry about
- * waiting for reloads */
-#define S3C2410_DMAF_AUTOSTART (1<<1) /* auto-start if buffer queued */
-
-#define S3C2410_DMAF_CIRCULAR (1 << 2) /* no circular dma support */
-
-/* dma buffer */
-
-struct s3c2410_dma_buf;
-
-/* s3c2410_dma_buf
- *
- * internally used buffer structure to describe a queued or running
- * buffer.
-*/
-
-struct s3c2410_dma_buf {
- struct s3c2410_dma_buf *next;
- int magic; /* magic */
- int size; /* buffer size in bytes */
- dma_addr_t data; /* start of DMA data */
- dma_addr_t ptr; /* where the DMA got to [1] */
- void *id; /* client's id */
-};
-
-/* [1] is this updated for both recv/send modes? */
-
-struct s3c2410_dma_stats {
- unsigned long loads;
- unsigned long timeout_longest;
- unsigned long timeout_shortest;
- unsigned long timeout_avg;
- unsigned long timeout_failed;
-};
-
-struct s3c2410_dma_map;
-
-/* struct s3c2410_dma_chan
- *
- * full state information for each DMA channel
-*/
-
-struct s3c2410_dma_chan {
- /* channel state flags and information */
- unsigned char number; /* number of this dma channel */
- unsigned char in_use; /* channel allocated */
- unsigned char irq_claimed; /* irq claimed for channel */
- unsigned char irq_enabled; /* irq enabled for channel */
- unsigned char xfer_unit; /* size of an transfer */
-
- /* channel state */
-
- enum s3c2410_dma_state state;
- enum s3c2410_dma_loadst load_state;
- struct s3c2410_dma_client *client;
-
- /* channel configuration */
- enum dma_data_direction source;
- enum dma_ch req_ch;
- unsigned long dev_addr;
- unsigned long load_timeout;
- unsigned int flags; /* channel flags */
-
- struct s3c24xx_dma_map *map; /* channel hw maps */
-
- /* channel's hardware position and configuration */
- void __iomem *regs; /* channels registers */
- void __iomem *addr_reg; /* data address register */
- unsigned int irq; /* channel irq */
- unsigned long dcon; /* default value of DCON */
-
- /* driver handles */
- s3c2410_dma_cbfn_t callback_fn; /* buffer done callback */
- s3c2410_dma_opfn_t op_fn; /* channel op callback */
-
- /* stats gathering */
- struct s3c2410_dma_stats *stats;
- struct s3c2410_dma_stats stats_store;
-
- /* buffer list and information */
- struct s3c2410_dma_buf *curr; /* current dma buffer */
- struct s3c2410_dma_buf *next; /* next buffer to load */
- struct s3c2410_dma_buf *end; /* end of queue */
-
- /* system device */
- struct device dev;
-};
-
-typedef unsigned long dma_device_t;
-
#endif /* __ASM_ARCH_DMA_H */
DMACH_MAX = 32
};
-struct s3c2410_dma_client {
- char *name;
-};
-
-static inline bool samsung_dma_has_circular(void)
-{
- return true;
-}
-
-static inline bool samsung_dma_is_dmadev(void)
-{
- return true;
-}
-
#include <linux/amba/pl08x.h>
-#include <plat/dma-ops.h>
#endif /* __ASM_ARCH_IRQ_H */
help
Compile in common setup code for S3C CAMIF devices
-# DMA
-
-config S3C_DMA
- bool
- help
- Internal configuration for S3C DMA core
-
config SAMSUNG_PM_GPIO
bool
default y if GPIO_SAMSUNG && PM
Include legacy GPIO power management code for platforms not using
pinctrl-samsung driver.
-config SAMSUNG_DMADEV
- bool "Use legacy Samsung DMA abstraction"
- depends on CPU_S5PV210 || ARCH_S3C64XX
- select DMADEVICES
- default y
- help
- Use DMA device engine for PL330 DMAC.
-
endif
config S5P_DEV_MFC
obj-$(CONFIG_S3C_SETUP_CAMIF) += setup-camif.o
-# DMA support
-
-obj-$(CONFIG_S3C_DMA) += dma.o s3c-dma-ops.o
-
-obj-$(CONFIG_SAMSUNG_DMADEV) += dma-ops.o
-
# PM support
obj-$(CONFIG_PM_SLEEP) += pm-common.o
+++ /dev/null
-/* linux/arch/arm/plat-samsung/dma-ops.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Samsung DMA Operations
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/amba/pl330.h>
-#include <linux/scatterlist.h>
-#include <linux/export.h>
-
-#include <mach/dma.h>
-
-#if defined(CONFIG_PL330_DMA)
-#define dma_filter pl330_filter
-#elif defined(CONFIG_S3C64XX_PL080)
-#define dma_filter pl08x_filter_id
-#endif
-
-static unsigned samsung_dmadev_request(enum dma_ch dma_ch,
- struct samsung_dma_req *param,
- struct device *dev, char *ch_name)
-{
- dma_cap_mask_t mask;
-
- dma_cap_zero(mask);
- dma_cap_set(param->cap, mask);
-
- if (dev->of_node)
- return (unsigned)dma_request_slave_channel(dev, ch_name);
- else
- return (unsigned)dma_request_channel(mask, dma_filter,
- (void *)dma_ch);
-}
-
-static int samsung_dmadev_release(unsigned ch, void *param)
-{
- dma_release_channel((struct dma_chan *)ch);
-
- return 0;
-}
-
-static int samsung_dmadev_config(unsigned ch,
- struct samsung_dma_config *param)
-{
- struct dma_chan *chan = (struct dma_chan *)ch;
- struct dma_slave_config slave_config;
-
- if (param->direction == DMA_DEV_TO_MEM) {
- memset(&slave_config, 0, sizeof(struct dma_slave_config));
- slave_config.direction = param->direction;
- slave_config.src_addr = param->fifo;
- slave_config.src_addr_width = param->width;
- slave_config.src_maxburst = 1;
- dmaengine_slave_config(chan, &slave_config);
- } else if (param->direction == DMA_MEM_TO_DEV) {
- memset(&slave_config, 0, sizeof(struct dma_slave_config));
- slave_config.direction = param->direction;
- slave_config.dst_addr = param->fifo;
- slave_config.dst_addr_width = param->width;
- slave_config.dst_maxburst = 1;
- dmaengine_slave_config(chan, &slave_config);
- } else {
- pr_warn("unsupported direction\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
-static int samsung_dmadev_prepare(unsigned ch,
- struct samsung_dma_prep *param)
-{
- struct scatterlist sg;
- struct dma_chan *chan = (struct dma_chan *)ch;
- struct dma_async_tx_descriptor *desc;
-
- switch (param->cap) {
- case DMA_SLAVE:
- sg_init_table(&sg, 1);
- sg_dma_len(&sg) = param->len;
- sg_set_page(&sg, pfn_to_page(PFN_DOWN(param->buf)),
- param->len, offset_in_page(param->buf));
- sg_dma_address(&sg) = param->buf;
-
- desc = dmaengine_prep_slave_sg(chan,
- &sg, 1, param->direction, DMA_PREP_INTERRUPT);
- break;
- case DMA_CYCLIC:
- desc = dmaengine_prep_dma_cyclic(chan, param->buf,
- param->len, param->period, param->direction,
- DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
- break;
- default:
- dev_err(&chan->dev->device, "unsupported format\n");
- return -EFAULT;
- }
-
- if (!desc) {
- dev_err(&chan->dev->device, "cannot prepare cyclic dma\n");
- return -EFAULT;
- }
-
- desc->callback = param->fp;
- desc->callback_param = param->fp_param;
-
- dmaengine_submit((struct dma_async_tx_descriptor *)desc);
-
- return 0;
-}
-
-static inline int samsung_dmadev_trigger(unsigned ch)
-{
- dma_async_issue_pending((struct dma_chan *)ch);
-
- return 0;
-}
-
-static inline int samsung_dmadev_flush(unsigned ch)
-{
- return dmaengine_terminate_all((struct dma_chan *)ch);
-}
-
-static struct samsung_dma_ops dmadev_ops = {
- .request = samsung_dmadev_request,
- .release = samsung_dmadev_release,
- .config = samsung_dmadev_config,
- .prepare = samsung_dmadev_prepare,
- .trigger = samsung_dmadev_trigger,
- .started = NULL,
- .flush = samsung_dmadev_flush,
- .stop = samsung_dmadev_flush,
-};
-
-void *samsung_dmadev_get_ops(void)
-{
- return &dmadev_ops;
-}
-EXPORT_SYMBOL(samsung_dmadev_get_ops);
+++ /dev/null
-/* linux/arch/arm/plat-samsung/dma.c
- *
- * Copyright (c) 2003-2009 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- * http://armlinux.simtec.co.uk/
- *
- * S3C DMA core
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-struct s3c2410_dma_buf;
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-
-#include <mach/dma.h>
-#include <mach/irqs.h>
-
-/* dma channel state information */
-struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
-struct s3c2410_dma_chan *s3c_dma_chan_map[DMACH_MAX];
-
-/* s3c_dma_lookup_channel
- *
- * change the dma channel number given into a real dma channel id
-*/
-
-struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel)
-{
- if (channel & DMACH_LOW_LEVEL)
- return &s3c2410_chans[channel & ~DMACH_LOW_LEVEL];
- else
- return s3c_dma_chan_map[channel];
-}
-
-/* do we need to protect the settings of the fields from
- * irq?
-*/
-
-int s3c2410_dma_set_opfn(enum dma_ch channel, s3c2410_dma_opfn_t rtn)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
-
- if (chan == NULL)
- return -EINVAL;
-
- pr_debug("%s: chan=%p, op rtn=%p\n", __func__, chan, rtn);
-
- chan->op_fn = rtn;
-
- return 0;
-}
-EXPORT_SYMBOL(s3c2410_dma_set_opfn);
-
-int s3c2410_dma_set_buffdone_fn(enum dma_ch channel, s3c2410_dma_cbfn_t rtn)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
-
- if (chan == NULL)
- return -EINVAL;
-
- pr_debug("%s: chan=%p, callback rtn=%p\n", __func__, chan, rtn);
-
- chan->callback_fn = rtn;
-
- return 0;
-}
-EXPORT_SYMBOL(s3c2410_dma_set_buffdone_fn);
-
-int s3c2410_dma_setflags(enum dma_ch channel, unsigned int flags)
-{
- struct s3c2410_dma_chan *chan = s3c_dma_lookup_channel(channel);
-
- if (chan == NULL)
- return -EINVAL;
-
- chan->flags = flags;
- return 0;
-}
-EXPORT_SYMBOL(s3c2410_dma_setflags);
+++ /dev/null
-/* arch/arm/plat-s3c/include/plat/dma.h
- *
- * Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- * http://armlinux.simtec.co.uk/
- *
- * Samsung S3C DMA core support
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-extern struct s3c2410_dma_chan *s3c_dma_lookup_channel(unsigned int channel);
-
-extern struct s3c2410_dma_chan *s3c_dma_chan_map[];
-
-/* the currently allocated channel information */
-extern struct s3c2410_dma_chan s3c2410_chans[];
-
-
+++ /dev/null
-/* arch/arm/plat-samsung/include/plat/dma-ops.h
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Samsung DMA support
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef __SAMSUNG_DMA_OPS_H_
-#define __SAMSUNG_DMA_OPS_H_ __FILE__
-
-#include <linux/dmaengine.h>
-#include <mach/dma.h>
-
-struct samsung_dma_req {
- enum dma_transaction_type cap;
- struct s3c2410_dma_client *client;
-};
-
-struct samsung_dma_prep {
- enum dma_transaction_type cap;
- enum dma_transfer_direction direction;
- dma_addr_t buf;
- unsigned long period;
- unsigned long len;
- void (*fp)(void *data);
- void *fp_param;
-};
-
-struct samsung_dma_config {
- enum dma_transfer_direction direction;
- enum dma_slave_buswidth width;
- dma_addr_t fifo;
-};
-
-struct samsung_dma_ops {
- unsigned (*request)(enum dma_ch ch, struct samsung_dma_req *param,
- struct device *dev, char *ch_name);
- int (*release)(unsigned ch, void *param);
- int (*config)(unsigned ch, struct samsung_dma_config *param);
- int (*prepare)(unsigned ch, struct samsung_dma_prep *param);
- int (*trigger)(unsigned ch);
- int (*started)(unsigned ch);
- int (*flush)(unsigned ch);
- int (*stop)(unsigned ch);
-};
-
-extern void *samsung_dmadev_get_ops(void);
-extern void *s3c_dma_get_ops(void);
-
-static inline void *__samsung_dma_get_ops(void)
-{
- if (samsung_dma_is_dmadev())
- return samsung_dmadev_get_ops();
- else
- return s3c_dma_get_ops();
-}
-
-/*
- * samsung_dma_get_ops
- * get the set of samsung dma operations
- */
-#define samsung_dma_get_ops() __samsung_dma_get_ops()
-
-#endif /* __SAMSUNG_DMA_OPS_H_ */
+++ /dev/null
-/*
- * Copyright (C) 2010 Samsung Electronics Co. Ltd.
- * Jaswinder Singh <jassi.brar@samsung.com>
- *
- * 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.
- */
-
-#ifndef __DMA_PL330_H_
-#define __DMA_PL330_H_ __FILE__
-
-/*
- * PL330 can assign any channel to communicate with
- * any of the peripherals attched to the DMAC.
- * For the sake of consistency across client drivers,
- * We keep the channel names unchanged and only add
- * missing peripherals are added.
- * Order is not important since DMA PL330 API driver
- * use these just as IDs.
- */
-enum dma_ch {
- DMACH_UART0_RX = 0,
- DMACH_UART0_TX,
- DMACH_UART1_RX,
- DMACH_UART1_TX,
- DMACH_UART2_RX,
- DMACH_UART2_TX,
- DMACH_UART3_RX,
- DMACH_UART3_TX,
- DMACH_UART4_RX,
- DMACH_UART4_TX,
- DMACH_UART5_RX,
- DMACH_UART5_TX,
- DMACH_USI_RX,
- DMACH_USI_TX,
- DMACH_IRDA,
- DMACH_I2S0_RX,
- DMACH_I2S0_TX,
- DMACH_I2S0S_TX,
- DMACH_I2S1_RX,
- DMACH_I2S1_TX,
- DMACH_I2S2_RX,
- DMACH_I2S2_TX,
- DMACH_SPI0_RX,
- DMACH_SPI0_TX,
- DMACH_SPI1_RX,
- DMACH_SPI1_TX,
- DMACH_SPI2_RX,
- DMACH_SPI2_TX,
- DMACH_AC97_MICIN,
- DMACH_AC97_PCMIN,
- DMACH_AC97_PCMOUT,
- DMACH_EXTERNAL,
- DMACH_PWM,
- DMACH_SPDIF,
- DMACH_HSI_RX,
- DMACH_HSI_TX,
- DMACH_PCM0_TX,
- DMACH_PCM0_RX,
- DMACH_PCM1_TX,
- DMACH_PCM1_RX,
- DMACH_PCM2_TX,
- DMACH_PCM2_RX,
- DMACH_MSM_REQ3,
- DMACH_MSM_REQ2,
- DMACH_MSM_REQ1,
- DMACH_MSM_REQ0,
- DMACH_SLIMBUS0_RX,
- DMACH_SLIMBUS0_TX,
- DMACH_SLIMBUS0AUX_RX,
- DMACH_SLIMBUS0AUX_TX,
- DMACH_SLIMBUS1_RX,
- DMACH_SLIMBUS1_TX,
- DMACH_SLIMBUS2_RX,
- DMACH_SLIMBUS2_TX,
- DMACH_SLIMBUS3_RX,
- DMACH_SLIMBUS3_TX,
- DMACH_SLIMBUS4_RX,
- DMACH_SLIMBUS4_TX,
- DMACH_SLIMBUS5_RX,
- DMACH_SLIMBUS5_TX,
- DMACH_MIPI_HSI0,
- DMACH_MIPI_HSI1,
- DMACH_MIPI_HSI2,
- DMACH_MIPI_HSI3,
- DMACH_MIPI_HSI4,
- DMACH_MIPI_HSI5,
- DMACH_MIPI_HSI6,
- DMACH_MIPI_HSI7,
- DMACH_DISP1,
- DMACH_MTOM_0,
- DMACH_MTOM_1,
- DMACH_MTOM_2,
- DMACH_MTOM_3,
- DMACH_MTOM_4,
- DMACH_MTOM_5,
- DMACH_MTOM_6,
- DMACH_MTOM_7,
- /* END Marker, also used to denote a reserved channel */
- DMACH_MAX,
-};
-
-struct s3c2410_dma_client {
- char *name;
-};
-
-static inline bool samsung_dma_has_circular(void)
-{
- return true;
-}
-
-static inline bool samsung_dma_is_dmadev(void)
-{
- return true;
-}
-
-#include <plat/dma-ops.h>
-
-#endif /* __DMA_PL330_H_ */
+++ /dev/null
-/* linux/arch/arm/plat-samsung/include/plat/dma-s3c24xx.h
- *
- * Copyright (C) 2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * Samsung S3C24XX DMA support - per SoC functions
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#include <plat/dma-core.h>
-
-extern struct bus_type dma_subsys;
-extern struct s3c2410_dma_chan s3c2410_chans[S3C_DMA_CHANNELS];
-
-#define DMA_CH_VALID (1<<31)
-#define DMA_CH_NEVER (1<<30)
-
-/* struct s3c24xx_dma_map
- *
- * this holds the mapping information for the channel selected
- * to be connected to the specified device
-*/
-
-struct s3c24xx_dma_map {
- const char *name;
-
- unsigned long channels[S3C_DMA_CHANNELS];
-};
-
-struct s3c24xx_dma_selection {
- struct s3c24xx_dma_map *map;
- unsigned long map_size;
- unsigned long dcon_mask;
-
- void (*select)(struct s3c2410_dma_chan *chan,
- struct s3c24xx_dma_map *map);
-};
-
-extern int s3c24xx_dma_init_map(struct s3c24xx_dma_selection *sel);
-
-/* struct s3c24xx_dma_order_ch
- *
- * channel map for one of the `enum dma_ch` dma channels. the list
- * entry contains a set of low-level channel numbers, orred with
- * DMA_CH_VALID, which are checked in the order in the array.
-*/
-
-struct s3c24xx_dma_order_ch {
- unsigned int list[S3C_DMA_CHANNELS]; /* list of channels */
- unsigned int flags; /* flags */
-};
-
-/* struct s3c24xx_dma_order
- *
- * information provided by either the core or the board to give the
- * dma system a hint on how to allocate channels
-*/
-
-struct s3c24xx_dma_order {
- struct s3c24xx_dma_order_ch channels[DMACH_MAX];
-};
-
-extern int s3c24xx_dma_order_set(struct s3c24xx_dma_order *map);
-
-/* DMA init code, called from the cpu support code */
-
-extern int s3c2410_dma_init(void);
-
-extern int s3c24xx_dma_init(unsigned int channels, unsigned int irq,
- unsigned int stride);
+++ /dev/null
-/* arch/arm/plat-samsung/include/plat/dma.h
- *
- * Copyright (C) 2003-2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * Samsung S3C DMA support
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#ifndef __PLAT_DMA_H
-#define __PLAT_DMA_H
-
-#include <linux/dma-mapping.h>
-
-enum s3c2410_dma_buffresult {
- S3C2410_RES_OK,
- S3C2410_RES_ERR,
- S3C2410_RES_ABORT
-};
-
-/* enum s3c2410_chan_op
- *
- * operation codes passed to the DMA code by the user, and also used
- * to inform the current channel owner of any changes to the system state
-*/
-
-enum s3c2410_chan_op {
- S3C2410_DMAOP_START,
- S3C2410_DMAOP_STOP,
- S3C2410_DMAOP_PAUSE,
- S3C2410_DMAOP_RESUME,
- S3C2410_DMAOP_FLUSH,
- S3C2410_DMAOP_TIMEOUT, /* internal signal to handler */
- S3C2410_DMAOP_STARTED, /* indicate channel started */
-};
-
-struct s3c2410_dma_client {
- char *name;
-};
-
-struct s3c2410_dma_chan;
-enum dma_ch;
-
-/* s3c2410_dma_cbfn_t
- *
- * buffer callback routine type
-*/
-
-typedef void (*s3c2410_dma_cbfn_t)(struct s3c2410_dma_chan *,
- void *buf, int size,
- enum s3c2410_dma_buffresult result);
-
-typedef int (*s3c2410_dma_opfn_t)(struct s3c2410_dma_chan *,
- enum s3c2410_chan_op );
-
-
-
-/* s3c2410_dma_request
- *
- * request a dma channel exclusivley
-*/
-
-extern int s3c2410_dma_request(enum dma_ch channel,
- struct s3c2410_dma_client *, void *dev);
-
-
-/* s3c2410_dma_ctrl
- *
- * change the state of the dma channel
-*/
-
-extern int s3c2410_dma_ctrl(enum dma_ch channel, enum s3c2410_chan_op op);
-
-/* s3c2410_dma_setflags
- *
- * set the channel's flags to a given state
-*/
-
-extern int s3c2410_dma_setflags(enum dma_ch channel,
- unsigned int flags);
-
-/* s3c2410_dma_free
- *
- * free the dma channel (will also abort any outstanding operations)
-*/
-
-extern int s3c2410_dma_free(enum dma_ch channel, struct s3c2410_dma_client *);
-
-/* s3c2410_dma_enqueue
- *
- * place the given buffer onto the queue of operations for the channel.
- * The buffer must be allocated from dma coherent memory, or the Dcache/WB
- * drained before the buffer is given to the DMA system.
-*/
-
-extern int s3c2410_dma_enqueue(enum dma_ch channel, void *id,
- dma_addr_t data, int size);
-
-/* s3c2410_dma_config
- *
- * configure the dma channel
-*/
-
-extern int s3c2410_dma_config(enum dma_ch channel, int xferunit);
-
-/* s3c2410_dma_devconfig
- *
- * configure the device we're talking to
-*/
-
-extern int s3c2410_dma_devconfig(enum dma_ch channel,
- enum dma_data_direction source, unsigned long devaddr);
-
-/* s3c2410_dma_getposition
- *
- * get the position that the dma transfer is currently at
-*/
-
-extern int s3c2410_dma_getposition(enum dma_ch channel,
- dma_addr_t *src, dma_addr_t *dest);
-
-extern int s3c2410_dma_set_opfn(enum dma_ch, s3c2410_dma_opfn_t rtn);
-extern int s3c2410_dma_set_buffdone_fn(enum dma_ch, s3c2410_dma_cbfn_t rtn);
-
-#include <plat/dma-ops.h>
-
-#endif
+++ /dev/null
-/* arch/arm/plat-samsung/include/plat/regs-dma.h
- *
- * Copyright (C) 2003-2006 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
- *
- * Samsung S3C24XX DMA support
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
-*/
-
-#ifndef __ASM_PLAT_REGS_DMA_H
-#define __ASM_PLAT_REGS_DMA_H __FILE__
-
-#define S3C2410_DMA_DISRC (0x00)
-#define S3C2410_DMA_DISRCC (0x04)
-#define S3C2410_DMA_DIDST (0x08)
-#define S3C2410_DMA_DIDSTC (0x0C)
-#define S3C2410_DMA_DCON (0x10)
-#define S3C2410_DMA_DSTAT (0x14)
-#define S3C2410_DMA_DCSRC (0x18)
-#define S3C2410_DMA_DCDST (0x1C)
-#define S3C2410_DMA_DMASKTRIG (0x20)
-#define S3C2412_DMA_DMAREQSEL (0x24)
-#define S3C2443_DMA_DMAREQSEL (0x24)
-
-#define S3C2410_DISRCC_INC (1 << 0)
-#define S3C2410_DISRCC_APB (1 << 1)
-
-#define S3C2410_DMASKTRIG_STOP (1 << 2)
-#define S3C2410_DMASKTRIG_ON (1 << 1)
-#define S3C2410_DMASKTRIG_SWTRIG (1 << 0)
-
-#define S3C2410_DCON_DEMAND (0 << 31)
-#define S3C2410_DCON_HANDSHAKE (1 << 31)
-#define S3C2410_DCON_SYNC_PCLK (0 << 30)
-#define S3C2410_DCON_SYNC_HCLK (1 << 30)
-
-#define S3C2410_DCON_INTREQ (1 << 29)
-
-#define S3C2410_DCON_CH0_XDREQ0 (0 << 24)
-#define S3C2410_DCON_CH0_UART0 (1 << 24)
-#define S3C2410_DCON_CH0_SDI (2 << 24)
-#define S3C2410_DCON_CH0_TIMER (3 << 24)
-#define S3C2410_DCON_CH0_USBEP1 (4 << 24)
-
-#define S3C2410_DCON_CH1_XDREQ1 (0 << 24)
-#define S3C2410_DCON_CH1_UART1 (1 << 24)
-#define S3C2410_DCON_CH1_I2SSDI (2 << 24)
-#define S3C2410_DCON_CH1_SPI (3 << 24)
-#define S3C2410_DCON_CH1_USBEP2 (4 << 24)
-
-#define S3C2410_DCON_CH2_I2SSDO (0 << 24)
-#define S3C2410_DCON_CH2_I2SSDI (1 << 24)
-#define S3C2410_DCON_CH2_SDI (2 << 24)
-#define S3C2410_DCON_CH2_TIMER (3 << 24)
-#define S3C2410_DCON_CH2_USBEP3 (4 << 24)
-
-#define S3C2410_DCON_CH3_UART2 (0 << 24)
-#define S3C2410_DCON_CH3_SDI (1 << 24)
-#define S3C2410_DCON_CH3_SPI (2 << 24)
-#define S3C2410_DCON_CH3_TIMER (3 << 24)
-#define S3C2410_DCON_CH3_USBEP4 (4 << 24)
-
-#define S3C2410_DCON_SRCSHIFT (24)
-#define S3C2410_DCON_SRCMASK (7 << 24)
-
-#define S3C2410_DCON_BYTE (0 << 20)
-#define S3C2410_DCON_HALFWORD (1 << 20)
-#define S3C2410_DCON_WORD (2 << 20)
-
-#define S3C2410_DCON_AUTORELOAD (0 << 22)
-#define S3C2410_DCON_NORELOAD (1 << 22)
-#define S3C2410_DCON_HWTRIG (1 << 23)
-
-#ifdef CONFIG_CPU_S3C2440
-
-#define S3C2440_DIDSTC_CHKINT (1 << 2)
-
-#define S3C2440_DCON_CH0_I2SSDO (5 << 24)
-#define S3C2440_DCON_CH0_PCMIN (6 << 24)
-
-#define S3C2440_DCON_CH1_PCMOUT (5 << 24)
-#define S3C2440_DCON_CH1_SDI (6 << 24)
-
-#define S3C2440_DCON_CH2_PCMIN (5 << 24)
-#define S3C2440_DCON_CH2_MICIN (6 << 24)
-
-#define S3C2440_DCON_CH3_MICIN (5 << 24)
-#define S3C2440_DCON_CH3_PCMOUT (6 << 24)
-#endif /* CONFIG_CPU_S3C2440 */
-
-#ifdef CONFIG_CPU_S3C2412
-
-#define S3C2412_DMAREQSEL_SRC(x) ((x) << 1)
-
-#define S3C2412_DMAREQSEL_HW (1)
-
-#define S3C2412_DMAREQSEL_SPI0TX S3C2412_DMAREQSEL_SRC(0)
-#define S3C2412_DMAREQSEL_SPI0RX S3C2412_DMAREQSEL_SRC(1)
-#define S3C2412_DMAREQSEL_SPI1TX S3C2412_DMAREQSEL_SRC(2)
-#define S3C2412_DMAREQSEL_SPI1RX S3C2412_DMAREQSEL_SRC(3)
-#define S3C2412_DMAREQSEL_I2STX S3C2412_DMAREQSEL_SRC(4)
-#define S3C2412_DMAREQSEL_I2SRX S3C2412_DMAREQSEL_SRC(5)
-#define S3C2412_DMAREQSEL_TIMER S3C2412_DMAREQSEL_SRC(9)
-#define S3C2412_DMAREQSEL_SDI S3C2412_DMAREQSEL_SRC(10)
-#define S3C2412_DMAREQSEL_USBEP1 S3C2412_DMAREQSEL_SRC(13)
-#define S3C2412_DMAREQSEL_USBEP2 S3C2412_DMAREQSEL_SRC(14)
-#define S3C2412_DMAREQSEL_USBEP3 S3C2412_DMAREQSEL_SRC(15)
-#define S3C2412_DMAREQSEL_USBEP4 S3C2412_DMAREQSEL_SRC(16)
-#define S3C2412_DMAREQSEL_XDREQ0 S3C2412_DMAREQSEL_SRC(17)
-#define S3C2412_DMAREQSEL_XDREQ1 S3C2412_DMAREQSEL_SRC(18)
-#define S3C2412_DMAREQSEL_UART0_0 S3C2412_DMAREQSEL_SRC(19)
-#define S3C2412_DMAREQSEL_UART0_1 S3C2412_DMAREQSEL_SRC(20)
-#define S3C2412_DMAREQSEL_UART1_0 S3C2412_DMAREQSEL_SRC(21)
-#define S3C2412_DMAREQSEL_UART1_1 S3C2412_DMAREQSEL_SRC(22)
-#define S3C2412_DMAREQSEL_UART2_0 S3C2412_DMAREQSEL_SRC(23)
-#define S3C2412_DMAREQSEL_UART2_1 S3C2412_DMAREQSEL_SRC(24)
-#endif /* CONFIG_CPU_S3C2412 */
-
-#if defined(CONFIG_CPU_S3C2416) || defined(CONFIG_CPU_S3C2443)
-
-#define S3C2443_DMAREQSEL_SRC(x) ((x) << 1)
-
-#define S3C2443_DMAREQSEL_HW (1)
-
-#define S3C2443_DMAREQSEL_SPI0TX S3C2443_DMAREQSEL_SRC(0)
-#define S3C2443_DMAREQSEL_SPI0RX S3C2443_DMAREQSEL_SRC(1)
-#define S3C2443_DMAREQSEL_SPI1TX S3C2443_DMAREQSEL_SRC(2)
-#define S3C2443_DMAREQSEL_SPI1RX S3C2443_DMAREQSEL_SRC(3)
-#define S3C2443_DMAREQSEL_I2STX S3C2443_DMAREQSEL_SRC(4)
-#define S3C2443_DMAREQSEL_I2SRX S3C2443_DMAREQSEL_SRC(5)
-#define S3C2443_DMAREQSEL_TIMER S3C2443_DMAREQSEL_SRC(9)
-#define S3C2443_DMAREQSEL_SDI S3C2443_DMAREQSEL_SRC(10)
-#define S3C2443_DMAREQSEL_XDREQ0 S3C2443_DMAREQSEL_SRC(17)
-#define S3C2443_DMAREQSEL_XDREQ1 S3C2443_DMAREQSEL_SRC(18)
-#define S3C2443_DMAREQSEL_UART0_0 S3C2443_DMAREQSEL_SRC(19)
-#define S3C2443_DMAREQSEL_UART0_1 S3C2443_DMAREQSEL_SRC(20)
-#define S3C2443_DMAREQSEL_UART1_0 S3C2443_DMAREQSEL_SRC(21)
-#define S3C2443_DMAREQSEL_UART1_1 S3C2443_DMAREQSEL_SRC(22)
-#define S3C2443_DMAREQSEL_UART2_0 S3C2443_DMAREQSEL_SRC(23)
-#define S3C2443_DMAREQSEL_UART2_1 S3C2443_DMAREQSEL_SRC(24)
-#define S3C2443_DMAREQSEL_UART3_0 S3C2443_DMAREQSEL_SRC(25)
-#define S3C2443_DMAREQSEL_UART3_1 S3C2443_DMAREQSEL_SRC(26)
-#define S3C2443_DMAREQSEL_PCMOUT S3C2443_DMAREQSEL_SRC(27)
-#define S3C2443_DMAREQSEL_PCMIN S3C2443_DMAREQSEL_SRC(28)
-#define S3C2443_DMAREQSEL_MICIN S3C2443_DMAREQSEL_SRC(29)
-#endif /* CONFIG_CPU_S3C2443 */
-
-#endif /* __ASM_PLAT_REGS_DMA_H */
+++ /dev/null
-/* linux/arch/arm/plat-samsung/s3c-dma-ops.c
- *
- * Copyright (c) 2011 Samsung Electronics Co., Ltd.
- * http://www.samsung.com
- *
- * Samsung S3C-DMA Operations
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/export.h>
-
-#include <mach/dma.h>
-
-struct cb_data {
- void (*fp) (void *);
- void *fp_param;
- unsigned ch;
- struct list_head node;
-};
-
-static LIST_HEAD(dma_list);
-
-static void s3c_dma_cb(struct s3c2410_dma_chan *channel, void *param,
- int size, enum s3c2410_dma_buffresult res)
-{
- struct cb_data *data = param;
-
- data->fp(data->fp_param);
-}
-
-static unsigned s3c_dma_request(enum dma_ch dma_ch,
- struct samsung_dma_req *param,
- struct device *dev, char *ch_name)
-{
- struct cb_data *data;
-
- if (s3c2410_dma_request(dma_ch, param->client, NULL) < 0) {
- s3c2410_dma_free(dma_ch, param->client);
- return 0;
- }
-
- if (param->cap == DMA_CYCLIC)
- s3c2410_dma_setflags(dma_ch, S3C2410_DMAF_CIRCULAR);
-
- data = kzalloc(sizeof(struct cb_data), GFP_KERNEL);
- data->ch = dma_ch;
- list_add_tail(&data->node, &dma_list);
-
- return (unsigned)dma_ch;
-}
-
-static int s3c_dma_release(unsigned ch, void *param)
-{
- struct cb_data *data;
-
- list_for_each_entry(data, &dma_list, node)
- if (data->ch == ch)
- break;
- list_del(&data->node);
-
- s3c2410_dma_free(ch, param);
- kfree(data);
-
- return 0;
-}
-
-static int s3c_dma_config(unsigned ch, struct samsung_dma_config *param)
-{
- s3c2410_dma_devconfig(ch, param->direction, param->fifo);
- s3c2410_dma_config(ch, param->width);
-
- return 0;
-}
-
-static int s3c_dma_prepare(unsigned ch, struct samsung_dma_prep *param)
-{
- struct cb_data *data;
- dma_addr_t pos = param->buf;
- dma_addr_t end = param->buf + param->len;
-
- list_for_each_entry(data, &dma_list, node)
- if (data->ch == ch)
- break;
-
- if (!data->fp) {
- s3c2410_dma_set_buffdone_fn(ch, s3c_dma_cb);
- data->fp = param->fp;
- data->fp_param = param->fp_param;
- }
-
- if (param->cap != DMA_CYCLIC) {
- s3c2410_dma_enqueue(ch, (void *)data, param->buf, param->len);
- return 0;
- }
-
- while (pos < end) {
- s3c2410_dma_enqueue(ch, (void *)data, pos, param->period);
- pos += param->period;
- }
-
- return 0;
-}
-
-static inline int s3c_dma_trigger(unsigned ch)
-{
- return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_START);
-}
-
-static inline int s3c_dma_started(unsigned ch)
-{
- return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STARTED);
-}
-
-static inline int s3c_dma_flush(unsigned ch)
-{
- return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_FLUSH);
-}
-
-static inline int s3c_dma_stop(unsigned ch)
-{
- return s3c2410_dma_ctrl(ch, S3C2410_DMAOP_STOP);
-}
-
-static struct samsung_dma_ops s3c_dma_ops = {
- .request = s3c_dma_request,
- .release = s3c_dma_release,
- .config = s3c_dma_config,
- .prepare = s3c_dma_prepare,
- .trigger = s3c_dma_trigger,
- .started = s3c_dma_started,
- .flush = s3c_dma_flush,
- .stop = s3c_dma_stop,
-};
-
-void *s3c_dma_get_ops(void)
-{
- return &s3c_dma_ops;
-}
-EXPORT_SYMBOL(s3c_dma_get_ops);
config S3C24XX_DMAC
tristate "Samsung S3C24XX DMA support"
- depends on ARCH_S3C24XX && !S3C24XX_DMA
+ depends on ARCH_S3C24XX
select DMA_ENGINE
select DMA_VIRTUAL_CHANNELS
help
projects / openwrt / staging / blogic.git / commitdiff