diff options
Diffstat (limited to 'arch/arm/mach-s3c24xx')
| -rw-r--r-- | arch/arm/mach-s3c24xx/Kconfig | 42 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/Makefile | 7 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/dma-s3c2410.c | 182 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/dma-s3c2412.c | 150 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/dma-s3c2440.c | 193 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/dma-s3c2443.c | 179 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/dma.c | 1465 | ||||
| -rw-r--r-- | arch/arm/mach-s3c24xx/include/mach/dma.h | 159 |
8 files changed, 0 insertions, 2377 deletions
diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig index 9eb22297cbe1..79c49ff77f6e 100644 --- a/arch/arm/mach-s3c24xx/Kconfig +++ b/arch/arm/mach-s3c24xx/Kconfig @@ -29,7 +29,6 @@ config CPU_S3C2410 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 @@ -40,7 +39,6 @@ config CPU_S3C2412 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 @@ -50,7 +48,6 @@ config CPU_S3C2416 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 @@ -59,7 +56,6 @@ config CPU_S3C2440 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. @@ -67,7 +63,6 @@ config CPU_S3C2442 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. @@ -80,7 +75,6 @@ config CPU_S3C2443 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 @@ -114,27 +108,6 @@ config S3C24XX_SETUP_TS 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 @@ -325,11 +298,6 @@ config CPU_S3C2412_ONLY !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 @@ -438,11 +406,6 @@ endif # CPU_S3C2416 if CPU_S3C2440 -config S3C2440_DMA - bool - help - Support for S3C2440 specific DMA code5A - config S3C2440_XTAL_12000000 bool help @@ -601,11 +564,6 @@ endif # CPU_S3C2442 if CPU_S3C2443 || CPU_S3C2416 -config S3C2443_DMA - bool - help - Internal config node for S3C2443 DMA support - config S3C2443_SETUP_SPI bool help diff --git a/arch/arm/mach-s3c24xx/Makefile b/arch/arm/mach-s3c24xx/Makefile index b92071638733..b40a22fe082a 100644 --- a/arch/arm/mach-s3c24xx/Makefile +++ b/arch/arm/mach-s3c24xx/Makefile @@ -12,12 +12,10 @@ 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 @@ -27,7 +25,6 @@ obj-$(CONFIG_S3C2416_PM) += pm-s3c2416.o obj-$(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-$(CONFIG_S3C2440_PLL_16934400) += pll-s3c2440-16934400.o @@ -39,15 +36,11 @@ obj-$(CONFIG_PM) += pm.o irq-pm.o sleep.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. diff --git a/arch/arm/mach-s3c24xx/dma-s3c2410.c b/arch/arm/mach-s3c24xx/dma-s3c2410.c deleted file mode 100644 index 09aa12da1789..000000000000 --- a/arch/arm/mach-s3c24xx/dma-s3c2410.c +++ /dev/null @@ -1,182 +0,0 @@ -/* 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 - diff --git a/arch/arm/mach-s3c24xx/dma-s3c2412.c b/arch/arm/mach-s3c24xx/dma-s3c2412.c deleted file mode 100644 index 0c0106d1a4d1..000000000000 --- a/arch/arm/mach-s3c24xx/dma-s3c2412.c +++ /dev/null @@ -1,150 +0,0 @@ -/* 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); diff --git a/arch/arm/mach-s3c24xx/dma-s3c2440.c b/arch/arm/mach-s3c24xx/dma-s3c2440.c deleted file mode 100644 index 2f8e8a3017df..000000000000 --- a/arch/arm/mach-s3c24xx/dma-s3c2440.c +++ /dev/null @@ -1,193 +0,0 @@ -/* 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); - diff --git a/arch/arm/mach-s3c24xx/dma-s3c2443.c b/arch/arm/mach-s3c24xx/dma-s3c2443.c deleted file mode 100644 index f4096ec0700a..000000000000 --- a/arch/arm/mach-s3c24xx/dma-s3c2443.c +++ /dev/null @@ -1,179 +0,0 @@ -/* 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 diff --git a/arch/arm/mach-s3c24xx/dma.c b/arch/arm/mach-s3c24xx/dma.c deleted file mode 100644 index a8dafc174fe3..000000000000 --- a/arch/arm/mach-s3c24xx/dma.c +++ /dev/null @@ -1,1465 +0,0 @@ -/* - * 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; -} diff --git a/arch/arm/mach-s3c24xx/include/mach/dma.h b/arch/arm/mach-s3c24xx/include/mach/dma.h index b55da1d8cd8f..9e8117198e0c 100644 --- a/arch/arm/mach-s3c24xx/include/mach/dma.h +++ b/arch/arm/mach-s3c24xx/include/mach/dma.h @@ -15,8 +15,6 @@ #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 @@ -54,161 +52,4 @@ enum dma_ch { 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 */ |