From 282b13d066927aeba7137ce3c03d2ee69b8d4940 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Tue, 9 Sep 2008 10:19:40 +0200 Subject: MXC: add convenience function to register platform devices Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/Makefile | 2 +- arch/arm/plat-mxc/devices.c | 36 +++++++++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/common.h | 3 +++ 3 files changed, 40 insertions(+), 1 deletion(-) create mode 100644 arch/arm/plat-mxc/devices.c (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index db66e9ae841..8c0f06e8fd3 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -3,6 +3,6 @@ # # Common support -obj-y := irq.o clock.o gpio.o time.o +obj-y := irq.o clock.o gpio.o time.o devices.o obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o diff --git a/arch/arm/plat-mxc/devices.c b/arch/arm/plat-mxc/devices.c new file mode 100644 index 00000000000..c66748267c4 --- /dev/null +++ b/arch/arm/plat-mxc/devices.c @@ -0,0 +1,36 @@ +/* + * Copyright 2008 Sascha Hauer, kernel@pengutronix.de + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include +#include +#include + +int __init mxc_register_device(struct platform_device *pdev, void *data) +{ + int ret; + + pdev->dev.platform_data = data; + + ret = platform_device_register(pdev); + if (ret) + pr_debug("Unable to register platform device '%s': %d\n", + pdev->name, ret); + + return ret; +} + diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h index a6d2e24aab1..6350287a59b 100644 --- a/arch/arm/plat-mxc/include/mach/common.h +++ b/arch/arm/plat-mxc/include/mach/common.h @@ -11,10 +11,13 @@ #ifndef __ASM_ARCH_MXC_COMMON_H__ #define __ASM_ARCH_MXC_COMMON_H__ +struct platform_device; + extern void mxc_map_io(void); extern void mxc_init_irq(void); extern void mxc_timer_init(const char *clk_timer); extern int mxc_clocks_init(unsigned long fref); extern int mxc_register_gpios(void); +extern int mxc_register_device(struct platform_device *pdev, void *data); #endif -- cgit v1.2.3 From cfc135632a17b57cc6f97a7dea474a5abcfac36a Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Tue, 9 Sep 2008 10:19:41 +0200 Subject: i.MX27: add definitions for USB pins Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h index 076d37b38eb..a09905e5bea 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h @@ -247,6 +247,11 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #endif #ifdef CONFIG_ARCH_MX2 +#define PA0_PF_USBH2_CLK (GPIO_PORTA | GPIO_PF | 0) +#define PA1_PF_USBH2_DIR (GPIO_PORTA | GPIO_PF | 1) +#define PA2_PF_USBH2_DATA7 (GPIO_PORTA | GPIO_PF | 2) +#define PA3_PF_USBH2_NXT (GPIO_PORTA | GPIO_PF | 3) +#define PA4_PF_USBH2_STP (GPIO_PORTA | GPIO_PF | 4) #define PA5_PF_LSCLK (GPIO_PORTA | GPIO_OUT | GPIO_PF | 5) #define PA6_PF_LD0 (GPIO_PORTA | GPIO_OUT | GPIO_PF | 6) #define PA7_PF_LD1 (GPIO_PORTA | GPIO_OUT | GPIO_PF | 7) @@ -294,6 +299,16 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PB20_AF_UART5_CTS (GPIO_PORTB | GPIO_OUT | GPIO_AF | 20) #define PB21_PF_CSI_HSYNC (GPIO_PORTB | GPIO_OUT | GPIO_PF | 21) #define PB21_AF_UART5_RTS (GPIO_PORTB | GPIO_IN | GPIO_AF | 21) +#define PB22_PF_USBH1_SUSP (GPIO_PORTB | GPIO_PF | 22) +#define PB23_PF_USB_PWR (GPIO_PORTB | GPIO_PF | 23) +#define PB24_PF_USB_OC_B (GPIO_PORTB | GPIO_PF | 24) +#define PB25_PF_USBH1_RCV (GPIO_PORTB | GPIO_PF | 25) +#define PB26_PF_USBH1_FS (GPIO_PORTB | GPIO_PF | 26) +#define PB27_PF_USBH1_OE_B (GPIO_PORTB | GPIO_PF | 27) +#define PB28_PF_USBH1_TXDM (GPIO_PORTB | GPIO_PF | 28) +#define PB29_PF_USBH1_TXDP (GPIO_PORTB | GPIO_PF | 29) +#define PB30_PF_USBH1_RXDM (GPIO_PORTB | GPIO_PF | 30) +#define PB31_PF_USBH1_RXDP (GPIO_PORTB | GPIO_PF | 31) #define PB26_AF_UART4_RTS (GPIO_PORTB | GPIO_IN | GPIO_PF | 26) #define PB28_AF_UART4_TXD (GPIO_PORTB | GPIO_OUT | GPIO_AF | 28) #define PB29_AF_UART4_CTS (GPIO_PORTB | GPIO_OUT | GPIO_AF | 29) @@ -335,8 +350,15 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PD16_AIN_FEC_TX_ER (GPIO_PORTD | GPIO_OUT | GPIO_AIN | 16) #define PD17_PF_I2C_DATA (GPIO_PORTD | GPIO_OUT | GPIO_PF | 17) #define PD18_PF_I2C_CLK (GPIO_PORTD | GPIO_OUT | GPIO_PF | 18) +#define PD19_AF_USBH2_DATA4 (GPIO_PORTD | GPIO_AF | 19) +#define PD20_AF_USBH2_DATA3 (GPIO_PORTD | GPIO_AF | 20) +#define PD21_AF_USBH2_DATA6 (GPIO_PORTD | GPIO_AF | 21) +#define PD22_AF_USBH2_DATA0 (GPIO_PORTD | GPIO_AF | 22) +#define PD23_AF_USBH2_DATA2 (GPIO_PORTD | GPIO_AF | 23) +#define PD24_AF_USBH2_DATA1 (GPIO_PORTD | GPIO_AF | 24) #define PD25_PF_CSPI1_RDY (GPIO_PORTD | GPIO_OUT | GPIO_PF | 25) #define PD26_PF_CSPI1_SS2 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 26) +#define PD26_AF_USBH2_DATA5 (GPIO_PORTD | GPIO_AF | 26) #define PD27_PF_CSPI1_SS1 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 27) #define PD28_PF_CSPI1_SS0 (GPIO_PORTD | GPIO_OUT | GPIO_PF | 28) #define PD29_PF_CSPI1_SCLK (GPIO_PORTD | GPIO_OUT | GPIO_PF | 29) -- cgit v1.2.3 From d7568f79d5c289d0d7859680be7b5afdcea0c9b2 Mon Sep 17 00:00:00 2001 From: Gilles Chanteperdrix Date: Tue, 9 Sep 2008 10:19:42 +0200 Subject: i.MX31ADS: Add CPLD interrupts demultiplexing (take 3). Needed for 8250 serial port and CS89x0 ethernet interface. Signed-off-by: Gilles Chanteperdrix Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/board-mx31ads.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/board-mx31ads.h b/arch/arm/plat-mxc/include/mach/board-mx31ads.h index 1bc6fb0f9a8..745b48864f9 100644 --- a/arch/arm/plat-mxc/include/mach/board-mx31ads.h +++ b/arch/arm/plat-mxc/include/mach/board-mx31ads.h @@ -90,6 +90,9 @@ #define PBC_INTMASK_CLEAR_REG (PBC_INTMASK_CLEAR + PBC_BASE_ADDRESS) #define EXPIO_PARENT_INT IOMUX_TO_IRQ(MX31_PIN_GPIO1_4) +#define MXC_EXP_IO_BASE (MXC_MAX_INT_LINES + MXC_MAX_GPIO_LINES) +#define MXC_IRQ_TO_EXPIO(irq) ((irq) - MXC_EXP_IO_BASE) + #define EXPIO_INT_LOW_BAT (MXC_EXP_IO_BASE + 0) #define EXPIO_INT_PB_IRQ (MXC_EXP_IO_BASE + 1) #define EXPIO_INT_OTG_FS_OVR (MXC_EXP_IO_BASE + 2) -- cgit v1.2.3 From 479c901f59762732dee305166ae477171cae3617 Mon Sep 17 00:00:00 2001 From: Darius Augulis Date: Tue, 9 Sep 2008 11:29:41 +0200 Subject: MXC: Lets handle IRQ by priority, defined with exported API function Signed-off-by: Darius Augulis Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/Kconfig | 11 +++++++++ arch/arm/plat-mxc/include/mach/entry-macro.S | 12 +++++++++- arch/arm/plat-mxc/include/mach/irqs.h | 1 + arch/arm/plat-mxc/irq.c | 35 ++++++++++++++++++++-------- 4 files changed, 48 insertions(+), 11 deletions(-) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig index e14eaad11dd..b2a7e3fad11 100644 --- a/arch/arm/plat-mxc/Kconfig +++ b/arch/arm/plat-mxc/Kconfig @@ -23,4 +23,15 @@ source "arch/arm/mach-mx3/Kconfig" endmenu +config MXC_IRQ_PRIOR + bool "Use IRQ priority" + depends on ARCH_MXC + help + Select this if you want to use prioritized IRQ handling. + This feature prevents higher priority ISR to be interrupted + by lower priority IRQ even IRQF_DISABLED flag is not set. + This may be useful in embedded applications, where are strong + requirements for timing. + Say N here, unless you have a specialized requirement. + endif diff --git a/arch/arm/plat-mxc/include/mach/entry-macro.S b/arch/arm/plat-mxc/include/mach/entry-macro.S index b542433afb1..11632028f7d 100644 --- a/arch/arm/plat-mxc/include/mach/entry-macro.S +++ b/arch/arm/plat-mxc/include/mach/entry-macro.S @@ -9,11 +9,17 @@ * published by the Free Software Foundation. */ +#define AVIC_NIMASK 0x04 + @ this macro disables fast irq (not implemented) .macro disable_fiq .endm .macro get_irqnr_preamble, base, tmp + ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR) +#ifdef CONFIG_MXC_IRQ_PRIOR + ldr r4, [\base, #AVIC_NIMASK] +#endif .endm .macro arch_ret_to_user, tmp1, tmp2 @@ -23,7 +29,6 @@ @ and returns its number in irqnr @ and returns if an interrupt occured in irqstat .macro get_irqnr_and_base, irqnr, irqstat, base, tmp - ldr \base, =AVIC_IO_ADDRESS(AVIC_BASE_ADDR) @ Load offset & priority of the highest priority @ interrupt pending from AVIC_NIVECSR ldr \irqstat, [\base, #0x40] @@ -32,6 +37,11 @@ mov \irqnr, \irqstat, asr #16 @ set zero flag if IRQ + 1 == 0 adds \tmp, \irqnr, #1 +#ifdef CONFIG_MXC_IRQ_PRIOR + bicne \tmp, \irqstat, #0xFFFFFFE0 + strne \tmp, [\base, #AVIC_NIMASK] + streq r4, [\base, #AVIC_NIMASK] +#endif .endm @ irq priority table (not used) diff --git a/arch/arm/plat-mxc/include/mach/irqs.h b/arch/arm/plat-mxc/include/mach/irqs.h index 228c4f68ccd..b55bba35e18 100644 --- a/arch/arm/plat-mxc/include/mach/irqs.h +++ b/arch/arm/plat-mxc/include/mach/irqs.h @@ -12,5 +12,6 @@ #define __ASM_ARCH_MXC_IRQS_H__ #include +extern void imx_irq_set_priority(unsigned char irq, unsigned char prio); #endif /* __ASM_ARCH_MXC_IRQS_H__ */ diff --git a/arch/arm/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c index 1053b666c67..a41abf0bdd6 100644 --- a/arch/arm/plat-mxc/irq.c +++ b/arch/arm/plat-mxc/irq.c @@ -30,14 +30,7 @@ #define AVIC_INTENABLEL (AVIC_BASE + 0x14) /* int enable reg low */ #define AVIC_INTTYPEH (AVIC_BASE + 0x18) /* int type reg high */ #define AVIC_INTTYPEL (AVIC_BASE + 0x1C) /* int type reg low */ -#define AVIC_NIPRIORITY7 (AVIC_BASE + 0x20) /* norm int priority lvl7 */ -#define AVIC_NIPRIORITY6 (AVIC_BASE + 0x24) /* norm int priority lvl6 */ -#define AVIC_NIPRIORITY5 (AVIC_BASE + 0x28) /* norm int priority lvl5 */ -#define AVIC_NIPRIORITY4 (AVIC_BASE + 0x2C) /* norm int priority lvl4 */ -#define AVIC_NIPRIORITY3 (AVIC_BASE + 0x30) /* norm int priority lvl3 */ -#define AVIC_NIPRIORITY2 (AVIC_BASE + 0x34) /* norm int priority lvl2 */ -#define AVIC_NIPRIORITY1 (AVIC_BASE + 0x38) /* norm int priority lvl1 */ -#define AVIC_NIPRIORITY0 (AVIC_BASE + 0x3C) /* norm int priority lvl0 */ +#define AVIC_NIPRIORITY(x) (AVIC_BASE + (0x20 + 4 * (7 - (x)))) /* int priority */ #define AVIC_NIVECSR (AVIC_BASE + 0x40) /* norm int vector/status */ #define AVIC_FIVECSR (AVIC_BASE + 0x44) /* fast int vector/status */ #define AVIC_INTSRCH (AVIC_BASE + 0x48) /* int source reg high */ @@ -54,6 +47,24 @@ #define IIM_PROD_REV_SH 3 #define IIM_PROD_REV_LEN 5 +#ifdef CONFIG_MXC_IRQ_PRIOR +void imx_irq_set_priority(unsigned char irq, unsigned char prio) +{ + unsigned int temp; + unsigned int mask = 0x0F << irq % 8 * 4; + + if (irq > 63) + return; + + temp = __raw_readl(AVIC_NIPRIORITY(irq / 8)); + temp &= ~mask; + temp |= prio & mask; + + __raw_writel(temp, AVIC_NIPRIORITY(irq / 8)); +} +EXPORT_SYMBOL(imx_irq_set_priority); +#endif + /* Disable interrupt number "irq" in the AVIC */ static void mxc_mask_irq(unsigned int irq) { @@ -101,10 +112,14 @@ void __init mxc_init_irq(void) set_irq_flags(i, IRQF_VALID); } + /* Set default priority value (0) for all IRQ's */ + for (i = 0; i < 8; i++) + __raw_writel(0, AVIC_NIPRIORITY(i)); + /* Set WDOG2's interrupt the highest priority level (bit 28-31) */ - reg = __raw_readl(AVIC_NIPRIORITY6); + reg = __raw_readl(AVIC_NIPRIORITY(6)); reg |= (0xF << 28); - __raw_writel(reg, AVIC_NIPRIORITY6); + __raw_writel(reg, AVIC_NIPRIORITY(6)); /* init architectures chained interrupt handler */ mxc_register_gpios(); -- cgit v1.2.3 From 7113cdcdc1842d797ea99af8b57606a069945f16 Mon Sep 17 00:00:00 2001 From: Luotao Fu Date: Tue, 9 Sep 2008 10:19:42 +0200 Subject: MX31: add macros to configure spi pins this adds convenience values usable by mxc_iomux_mode() to configure Pins of the spi interfaces on mx31. Signed-off-by: Luotao Fu Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/iomux-mx3.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx3.h b/arch/arm/plat-mxc/include/mach/iomux-mx3.h index 7509e7692f0..c9f39c2fb8c 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx3.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx3.h @@ -491,6 +491,26 @@ enum iomux_pins { #define MX31_PIN_RTS1__RTS1 IOMUX_MODE(MX31_PIN_RTS1, IOMUX_CONFIG_FUNC) #define MX31_PIN_TXD1__TXD1 IOMUX_MODE(MX31_PIN_TXD1, IOMUX_CONFIG_FUNC) #define MX31_PIN_RXD1__RXD1 IOMUX_MODE(MX31_PIN_RXD1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI1_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI1_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI1_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI1_SPI_RDY, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS0__SS0 IOMUX_MODE(MX31_PIN_CSPI1_SS0, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS1__SS1 IOMUX_MODE(MX31_PIN_CSPI1_SS1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI1_SS2__SS2 IOMUX_MODE(MX31_PIN_CSPI1_SS2, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI2_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI2_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI2_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI2_SPI_RDY, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS0__SS0 IOMUX_MODE(MX31_PIN_CSPI2_SS0, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS1__SS1 IOMUX_MODE(MX31_PIN_CSPI2_SS1, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI2_SS2__SS2 IOMUX_MODE(MX31_PIN_CSPI2_SS2, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_MOSI__MOSI IOMUX_MODE(MX31_PIN_CSPI3_MOSI, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_MISO__MISO IOMUX_MODE(MX31_PIN_CSPI3_MISO, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_SCLK__SCLK IOMUX_MODE(MX31_PIN_CSPI3_SCLK, IOMUX_CONFIG_FUNC) +#define MX31_PIN_CSPI3_SPI_RDY__SPI_RDY IOMUX_MODE(MX31_PIN_CSPI3_SPI_RDY, IOMUX_CONFIG_FUNC) +/*XXX: The SS0, SS1, SS2, SS3 lines of spi3 are multiplexed by cspi2_ss0, cspi2_ss1, cspi1_ss0 + * cspi1_ss1*/ /* * This function configures the pad value for a IOMUX pin. -- cgit v1.2.3 From 2cf842b8967b5a9989a12e6105da9a82d24e5777 Mon Sep 17 00:00:00 2001 From: Luotao Fu Date: Tue, 9 Sep 2008 10:19:42 +0200 Subject: mxc: add cscr register defintions This adds macros to get CSCR upper, lower and additional registers. These registers are needed to configure a chip select line. The offset layouts of these Registers are identical on mx27 and mx31, hence we can use the macros in generic way Signed-off-by: Luotao Fu Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/mxc.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/mxc.h b/arch/arm/plat-mxc/include/mach/mxc.h index 332eda4dbd3..f6caab06213 100644 --- a/arch/arm/plat-mxc/include/mach/mxc.h +++ b/arch/arm/plat-mxc/include/mach/mxc.h @@ -33,4 +33,10 @@ # define cpu_is_mx27() (0) #endif +#if defined(CONFIG_ARCH_MX3) || defined(CONFIG_ARCH_MX2) +#define CSCR_U(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10) +#define CSCR_L(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10 + 0x4) +#define CSCR_A(n) (IO_ADDRESS(WEIM_BASE_ADDR) + n * 0x10 + 0x8) +#endif + #endif /* __ASM_ARCH_MXC_H__ */ -- cgit v1.2.3 From 8b0171fad1db5c9a5b315f4a11e65da45fbd6f21 Mon Sep 17 00:00:00 2001 From: Luotao Fu Date: Tue, 9 Sep 2008 10:19:43 +0200 Subject: MXC: add RTCK alternate function definitions This one adds definitions to configure RTCK pad (PE16) in primary and alternate function. The RTCK Pin is used by one wire master controller and as JTAG Clock return. Signed-off-by: Luotao Fu Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h index a09905e5bea..3d09bfd6c53 100644 --- a/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h +++ b/arch/arm/plat-mxc/include/mach/iomux-mx1-mx2.h @@ -377,6 +377,8 @@ extern int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count, #define PE13_PF_UART1_RXD (GPIO_PORTE | GPIO_IN | GPIO_PF | 13) #define PE14_PF_UART1_CTS (GPIO_PORTE | GPIO_OUT | GPIO_PF | 14) #define PE15_PF_UART1_RTS (GPIO_PORTE | GPIO_IN | GPIO_PF | 15) +#define PE16_AF_RTCK (GPIO_PORTE | GPIO_OUT | GPIO_AF | 16) +#define PE16_PF_RTCK (GPIO_PORTE | GPIO_OUT | GPIO_PF | 16) #define PE18_AF_CSPI3_MISO (GPIO_PORTE | GPIO_IN | GPIO_AF | 18) #define PE21_AF_CSPI3_SS (GPIO_PORTE | GPIO_OUT | GPIO_AF | 21) #define PE22_AF_CSPI3_MOSI (GPIO_PORTE | GPIO_OUT | GPIO_AF | 22) -- cgit v1.2.3 From defa8c309d280915a2e7f4451f70bcbb087088a3 Mon Sep 17 00:00:00 2001 From: Luotao Fu Date: Tue, 9 Sep 2008 10:19:43 +0200 Subject: i.MX3: Fix compiler warnings Fix some base address declaration by adding a cast. Signed-off-by: Luotao Fu Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/include/mach/clock.h | 2 +- arch/arm/plat-mxc/include/mach/mx27.h | 1 + arch/arm/plat-mxc/include/mach/mx31.h | 1 + 3 files changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/include/mach/clock.h b/arch/arm/plat-mxc/include/mach/clock.h index 24caa2b7c91..d21f78e7881 100644 --- a/arch/arm/plat-mxc/include/mach/clock.h +++ b/arch/arm/plat-mxc/include/mach/clock.h @@ -39,7 +39,7 @@ struct clk { /* Register bit position for clock's enable/disable control. */ u8 enable_shift; /* Register address for clock's enable/disable control. */ - u32 enable_reg; + void __iomem *enable_reg; u32 flags; /* get the current clock rate (always a fresh value) */ unsigned long (*get_rate) (struct clk *); diff --git a/arch/arm/plat-mxc/include/mach/mx27.h b/arch/arm/plat-mxc/include/mach/mx27.h index 212ecc24662..a86db64744a 100644 --- a/arch/arm/plat-mxc/include/mach/mx27.h +++ b/arch/arm/plat-mxc/include/mach/mx27.h @@ -128,6 +128,7 @@ * it returns 0xDEADBEEF */ #define IO_ADDRESS(x) \ + (void __iomem *) \ (((x >= AIPI_BASE_ADDR) && (x < (AIPI_BASE_ADDR + AIPI_SIZE))) ? \ AIPI_IO_ADDRESS(x) : \ ((x >= SAHB1_BASE_ADDR) && (x < (SAHB1_BASE_ADDR + SAHB1_SIZE))) ? \ diff --git a/arch/arm/plat-mxc/include/mach/mx31.h b/arch/arm/plat-mxc/include/mach/mx31.h index a7373e4a56c..0536f8917bc 100644 --- a/arch/arm/plat-mxc/include/mach/mx31.h +++ b/arch/arm/plat-mxc/include/mach/mx31.h @@ -198,6 +198,7 @@ * it returns 0xDEADBEEF */ #define IO_ADDRESS(x) \ + (void __iomem *) \ (((x >= IRAM_BASE_ADDR) && (x < (IRAM_BASE_ADDR + IRAM_SIZE))) ? IRAM_IO_ADDRESS(x):\ ((x >= L2CC_BASE_ADDR) && (x < (L2CC_BASE_ADDR + L2CC_SIZE))) ? L2CC_IO_ADDRESS(x):\ ((x >= AIPS1_BASE_ADDR) && (x < (AIPS1_BASE_ADDR + AIPS1_SIZE))) ? AIPS1_IO_ADDRESS(x):\ -- cgit v1.2.3 From 8b69ac577e644e5084a9d7a93e4ccd5184c77626 Mon Sep 17 00:00:00 2001 From: Darius Augulis Date: Tue, 9 Sep 2008 10:19:43 +0200 Subject: MXC: Remove WD IRQ priority setting Remove WD IRQ priority setting from ARCH_MXC common init code, because it's application specific. Signed-off-by: Darius Augulis Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/irq.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c index a41abf0bdd6..da28105e35e 100644 --- a/arch/arm/plat-mxc/irq.c +++ b/arch/arm/plat-mxc/irq.c @@ -116,11 +116,6 @@ void __init mxc_init_irq(void) for (i = 0; i < 8; i++) __raw_writel(0, AVIC_NIPRIORITY(i)); - /* Set WDOG2's interrupt the highest priority level (bit 28-31) */ - reg = __raw_readl(AVIC_NIPRIORITY(6)); - reg |= (0xF << 28); - __raw_writel(reg, AVIC_NIPRIORITY(6)); - /* init architectures chained interrupt handler */ mxc_register_gpios(); -- cgit v1.2.3 From 58a85f465fb16a918a869eba05addb8f78d9e064 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Tue, 9 Sep 2008 10:19:44 +0200 Subject: MX2: Add DMA support for mx2 and (eventually) mx1 This patch adds DMA support for Freescale i.MX27 SoCs. It is derived from the i.MX1 port and should (though currently untested) still be working for the i.MX1. Signed-off-by: Sascha Hauer --- arch/arm/plat-mxc/Makefile | 2 +- arch/arm/plat-mxc/dma-mx1-mx2.c | 840 +++++++++++++++++++++++++++ arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h | 89 +++ 3 files changed, 930 insertions(+), 1 deletion(-) create mode 100644 arch/arm/plat-mxc/dma-mx1-mx2.c create mode 100644 arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h (limited to 'arch/arm/plat-mxc') diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile index 8c0f06e8fd3..067556f7c91 100644 --- a/arch/arm/plat-mxc/Makefile +++ b/arch/arm/plat-mxc/Makefile @@ -5,4 +5,4 @@ # Common support obj-y := irq.o clock.o gpio.o time.o devices.o -obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o +obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o dma-mx1-mx2.o diff --git a/arch/arm/plat-mxc/dma-mx1-mx2.c b/arch/arm/plat-mxc/dma-mx1-mx2.c new file mode 100644 index 00000000000..b296f19fd89 --- /dev/null +++ b/arch/arm/plat-mxc/dma-mx1-mx2.c @@ -0,0 +1,840 @@ +/* + * linux/arch/arm/plat-mxc/dma-mx1-mx2.c + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa + * Copyright 2008 Juergen Beisert, + * Copyright 2008 Sascha Hauer, + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define DMA_DCR 0x00 /* Control Register */ +#define DMA_DISR 0x04 /* Interrupt status Register */ +#define DMA_DIMR 0x08 /* Interrupt mask Register */ +#define DMA_DBTOSR 0x0c /* Burst timeout status Register */ +#define DMA_DRTOSR 0x10 /* Request timeout Register */ +#define DMA_DSESR 0x14 /* Transfer Error Status Register */ +#define DMA_DBOSR 0x18 /* Buffer overflow status Register */ +#define DMA_DBTOCR 0x1c /* Burst timeout control Register */ +#define DMA_WSRA 0x40 /* W-Size Register A */ +#define DMA_XSRA 0x44 /* X-Size Register A */ +#define DMA_YSRA 0x48 /* Y-Size Register A */ +#define DMA_WSRB 0x4c /* W-Size Register B */ +#define DMA_XSRB 0x50 /* X-Size Register B */ +#define DMA_YSRB 0x54 /* Y-Size Register B */ +#define DMA_SAR(x) (0x80 + ((x) << 6)) /* Source Address Registers */ +#define DMA_DAR(x) (0x84 + ((x) << 6)) /* Destination Address Registers */ +#define DMA_CNTR(x) (0x88 + ((x) << 6)) /* Count Registers */ +#define DMA_CCR(x) (0x8c + ((x) << 6)) /* Control Registers */ +#define DMA_RSSR(x) (0x90 + ((x) << 6)) /* Request source select Registers */ +#define DMA_BLR(x) (0x94 + ((x) << 6)) /* Burst length Registers */ +#define DMA_RTOR(x) (0x98 + ((x) << 6)) /* Request timeout Registers */ +#define DMA_BUCR(x) (0x98 + ((x) << 6)) /* Bus Utilization Registers */ +#define DMA_CCNR(x) (0x9C + ((x) << 6)) /* Channel counter Registers */ + +#define DCR_DRST (1<<1) +#define DCR_DEN (1<<0) +#define DBTOCR_EN (1<<15) +#define DBTOCR_CNT(x) ((x) & 0x7fff) +#define CNTR_CNT(x) ((x) & 0xffffff) +#define CCR_ACRPT (1<<14) +#define CCR_DMOD_LINEAR (0x0 << 12) +#define CCR_DMOD_2D (0x1 << 12) +#define CCR_DMOD_FIFO (0x2 << 12) +#define CCR_DMOD_EOBFIFO (0x3 << 12) +#define CCR_SMOD_LINEAR (0x0 << 10) +#define CCR_SMOD_2D (0x1 << 10) +#define CCR_SMOD_FIFO (0x2 << 10) +#define CCR_SMOD_EOBFIFO (0x3 << 10) +#define CCR_MDIR_DEC (1<<9) +#define CCR_MSEL_B (1<<8) +#define CCR_DSIZ_32 (0x0 << 6) +#define CCR_DSIZ_8 (0x1 << 6) +#define CCR_DSIZ_16 (0x2 << 6) +#define CCR_SSIZ_32 (0x0 << 4) +#define CCR_SSIZ_8 (0x1 << 4) +#define CCR_SSIZ_16 (0x2 << 4) +#define CCR_REN (1<<3) +#define CCR_RPT (1<<2) +#define CCR_FRC (1<<1) +#define CCR_CEN (1<<0) +#define RTOR_EN (1<<15) +#define RTOR_CLK (1<<14) +#define RTOR_PSC (1<<13) + +/* + * struct imx_dma_channel - i.MX specific DMA extension + * @name: name specified by DMA client + * @irq_handler: client callback for end of transfer + * @err_handler: client callback for error condition + * @data: clients context data for callbacks + * @dma_mode: direction of the transfer %DMA_MODE_READ or %DMA_MODE_WRITE + * @sg: pointer to the actual read/written chunk for scatter-gather emulation + * @resbytes: total residual number of bytes to transfer + * (it can be lower or same as sum of SG mapped chunk sizes) + * @sgcount: number of chunks to be read/written + * + * Structure is used for IMX DMA processing. It would be probably good + * @struct dma_struct in the future for external interfacing and use + * @struct imx_dma_channel only as extension to it. + */ + +struct imx_dma_channel { + const char *name; + void (*irq_handler) (int, void *); + void (*err_handler) (int, void *, int errcode); + void (*prog_handler) (int, void *, struct scatterlist *); + void *data; + dmamode_t dma_mode; + struct scatterlist *sg; + unsigned int resbytes; + int dma_num; + + int in_use; + + u32 ccr_from_device; + u32 ccr_to_device; + + struct timer_list watchdog; + + int hw_chaining; +}; + +static struct imx_dma_channel imx_dma_channels[IMX_DMA_CHANNELS]; + +static struct clk *dma_clk; + +static int imx_dma_hw_chain(struct imx_dma_channel *imxdma) +{ + if (cpu_is_mx27()) + return imxdma->hw_chaining; + else + return 0; +} + + +/* + * imx_dma_sg_next - prepare next chunk for scatter-gather DMA emulation + */ +static inline int imx_dma_sg_next(int channel, struct scatterlist *sg) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long now; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return 0; + } + + now = min(imxdma->resbytes, sg->length); + imxdma->resbytes -= now; + + if ((imxdma->dma_mode & DMA_MODE_MASK) == DMA_MODE_READ) + __raw_writel(sg->dma_address, DMA_BASE + DMA_DAR(channel)); + else + __raw_writel(sg->dma_address, DMA_BASE + DMA_SAR(channel)); + + __raw_writel(now, DMA_BASE + DMA_CNTR(channel)); + + pr_debug("imxdma%d: next sg chunk dst 0x%08x, src 0x%08x, " + "size 0x%08x\n", channel, + __raw_readl(DMA_BASE + DMA_DAR(channel)), + __raw_readl(DMA_BASE + DMA_SAR(channel)), + __raw_readl(DMA_BASE + DMA_CNTR(channel))); + + return now; +} + +/** + * imx_dma_setup_single - setup i.MX DMA channel for linear memory to/from + * device transfer + * + * @channel: i.MX DMA channel number + * @dma_address: the DMA/physical memory address of the linear data block + * to transfer + * @dma_length: length of the data block in bytes + * @dev_addr: physical device port address + * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory + * or %DMA_MODE_WRITE from memory to the device + * + * Return value: if incorrect parameters are provided -%EINVAL. + * Zero indicates success. + */ +int +imx_dma_setup_single(int channel, dma_addr_t dma_address, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + imxdma->sg = NULL; + imxdma->dma_mode = dmamode; + + if (!dma_address) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single null address\n", + channel); + return -EINVAL; + } + + if (!dma_length) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single zero length\n", + channel); + return -EINVAL; + } + + if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) { + pr_debug("imxdma%d: %s dma_addressg=0x%08x dma_length=%d " + "dev_addr=0x%08x for read\n", + channel, __func__, (unsigned int)dma_address, + dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_SAR(channel)); + __raw_writel(dma_address, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_from_device, + DMA_BASE + DMA_CCR(channel)); + } else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) { + pr_debug("imxdma%d: %s dma_addressg=0x%08x dma_length=%d " + "dev_addr=0x%08x for write\n", + channel, __func__, (unsigned int)dma_address, + dma_length, dev_addr); + + __raw_writel(dma_address, DMA_BASE + DMA_SAR(channel)); + __raw_writel(dev_addr, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_to_device, + DMA_BASE + DMA_CCR(channel)); + } else { + printk(KERN_ERR "imxdma%d: imx_dma_setup_single bad dmamode\n", + channel); + return -EINVAL; + } + + __raw_writel(dma_length, DMA_BASE + DMA_CNTR(channel)); + + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_single); + +/** + * imx_dma_setup_sg - setup i.MX DMA channel SG list to/from device transfer + * @channel: i.MX DMA channel number + * @sg: pointer to the scatter-gather list/vector + * @sgcount: scatter-gather list hungs count + * @dma_length: total length of the transfer request in bytes + * @dev_addr: physical device port address + * @dmamode: DMA transfer mode, %DMA_MODE_READ from the device to the memory + * or %DMA_MODE_WRITE from memory to the device + * + * The function sets up DMA channel state and registers to be ready for + * transfer specified by provided parameters. The scatter-gather emulation + * is set up according to the parameters. + * + * The full preparation of the transfer requires setup of more register + * by the caller before imx_dma_enable() can be called. + * + * %BLR(channel) holds transfer burst length in bytes, 0 means 64 bytes + * + * %RSSR(channel) has to be set to the DMA request line source %DMA_REQ_xxx + * + * %CCR(channel) has to specify transfer parameters, the next settings is + * typical for linear or simple scatter-gather transfers if %DMA_MODE_READ is + * specified + * + * %CCR_DMOD_LINEAR | %CCR_DSIZ_32 | %CCR_SMOD_FIFO | %CCR_SSIZ_x + * + * The typical setup for %DMA_MODE_WRITE is specified by next options + * combination + * + * %CCR_SMOD_LINEAR | %CCR_SSIZ_32 | %CCR_DMOD_FIFO | %CCR_DSIZ_x + * + * Be careful here and do not mistakenly mix source and target device + * port sizes constants, they are really different: + * %CCR_SSIZ_8, %CCR_SSIZ_16, %CCR_SSIZ_32, + * %CCR_DSIZ_8, %CCR_DSIZ_16, %CCR_DSIZ_32 + * + * Return value: if incorrect parameters are provided -%EINVAL. + * Zero indicates success. + */ +int +imx_dma_setup_sg(int channel, + struct scatterlist *sg, unsigned int sgcount, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + if (imxdma->in_use) + return -EBUSY; + + imxdma->sg = sg; + imxdma->dma_mode = dmamode; + imxdma->resbytes = dma_length; + + if (!sg || !sgcount) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg epty sg list\n", + channel); + return -EINVAL; + } + + if (!sg->length) { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg zero length\n", + channel); + return -EINVAL; + } + + if ((dmamode & DMA_MODE_MASK) == DMA_MODE_READ) { + pr_debug("imxdma%d: %s sg=%p sgcount=%d total length=%d " + "dev_addr=0x%08x for read\n", + channel, __func__, sg, sgcount, dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_SAR(channel)); + __raw_writel(imxdma->ccr_from_device, + DMA_BASE + DMA_CCR(channel)); + } else if ((dmamode & DMA_MODE_MASK) == DMA_MODE_WRITE) { + pr_debug("imxdma%d: %s sg=%p sgcount=%d total length=%d " + "dev_addr=0x%08x for write\n", + channel, __func__, sg, sgcount, dma_length, dev_addr); + + __raw_writel(dev_addr, DMA_BASE + DMA_DAR(channel)); + __raw_writel(imxdma->ccr_to_device, + DMA_BASE + DMA_CCR(channel)); + } else { + printk(KERN_ERR "imxdma%d: imx_dma_setup_sg bad dmamode\n", + channel); + return -EINVAL; + } + + imx_dma_sg_next(channel, sg); + + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_sg); + +int +imx_dma_config_channel(int channel, unsigned int config_port, + unsigned int config_mem, unsigned int dmareq, int hw_chaining) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + u32 dreq = 0; + + imxdma->hw_chaining = 0; + + if (hw_chaining) { + imxdma->hw_chaining = 1; + if (!imx_dma_hw_chain(imxdma)) + return -EINVAL; + } + + if (dmareq) + dreq = CCR_REN; + + imxdma->ccr_from_device = config_port | (config_mem << 2) | dreq; + imxdma->ccr_to_device = config_mem | (config_port << 2) | dreq; + + __raw_writel(dmareq, DMA_BASE + DMA_RSSR(channel)); + + return 0; +} +EXPORT_SYMBOL(imx_dma_config_channel); + +void imx_dma_config_burstlen(int channel, unsigned int burstlen) +{ + __raw_writel(burstlen, DMA_BASE + DMA_BLR(channel)); +} +EXPORT_SYMBOL(imx_dma_config_burstlen); + +/** + * imx_dma_setup_handlers - setup i.MX DMA channel end and error notification + * handlers + * @channel: i.MX DMA channel number + * @irq_handler: the pointer to the function called if the transfer + * ends successfully + * @err_handler: the pointer to the function called if the premature + * end caused by error occurs + * @data: user specified value to be passed to the handlers + */ +int +imx_dma_setup_handlers(int channel, + void (*irq_handler) (int, void *), + void (*err_handler) (int, void *, int), + void *data) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return -ENODEV; + } + + local_irq_save(flags); + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + imxdma->irq_handler = irq_handler; + imxdma->err_handler = err_handler; + imxdma->data = data; + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_handlers); + +/** + * imx_dma_setup_progression_handler - setup i.MX DMA channel progression + * handlers + * @channel: i.MX DMA channel number + * @prog_handler: the pointer to the function called if the transfer progresses + */ +int +imx_dma_setup_progression_handler(int channel, + void (*prog_handler) (int, void*, struct scatterlist*)) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return -ENODEV; + } + + local_irq_save(flags); + imxdma->prog_handler = prog_handler; + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_setup_progression_handler); + +/** + * imx_dma_enable - function to start i.MX DMA channel operation + * @channel: i.MX DMA channel number + * + * The channel has to be allocated by driver through imx_dma_request() + * or imx_dma_request_by_prio() function. + * The transfer parameters has to be set to the channel registers through + * call of the imx_dma_setup_single() or imx_dma_setup_sg() function + * and registers %BLR(channel), %RSSR(channel) and %CCR(channel) has to + * be set prior this function call by the channel user. + */ +void imx_dma_enable(int channel) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + pr_debug("imxdma%d: imx_dma_enable\n", channel); + + if (!imxdma->name) { + printk(KERN_CRIT "%s: called for not allocated channel %d\n", + __func__, channel); + return; + } + + if (imxdma->in_use) + return; + + local_irq_save(flags); + + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) & ~(1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) | CCR_CEN | + CCR_ACRPT, + DMA_BASE + DMA_CCR(channel)); + +#ifdef CONFIG_ARCH_MX2 + if (imxdma->sg && imx_dma_hw_chain(imxdma)) { + imxdma->sg = sg_next(imxdma->sg); + if (imxdma->sg) { + u32 tmp; + imx_dma_sg_next(channel, imxdma->sg); + tmp = __raw_readl(DMA_BASE + DMA_CCR(channel)); + __raw_writel(tmp | CCR_RPT | CCR_ACRPT, + DMA_BASE + DMA_CCR(channel)); + } + } +#endif + imxdma->in_use = 1; + + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_enable); + +/** + * imx_dma_disable - stop, finish i.MX DMA channel operatin + * @channel: i.MX DMA channel number + */ +void imx_dma_disable(int channel) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + + pr_debug("imxdma%d: imx_dma_disable\n", channel); + + if (imx_dma_hw_chain(imxdma)) + del_timer(&imxdma->watchdog); + + local_irq_save(flags); + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) | (1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) & ~CCR_CEN, + DMA_BASE + DMA_CCR(channel)); + __raw_writel(1 << channel, DMA_BASE + DMA_DISR); + imxdma->in_use = 0; + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_disable); + +static void imx_dma_watchdog(unsigned long chno) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[chno]; + + __raw_writel(0, DMA_BASE + DMA_CCR(chno)); + imxdma->in_use = 0; + imxdma->sg = NULL; + + if (imxdma->err_handler) + imxdma->err_handler(chno, imxdma->data, IMX_DMA_ERR_TIMEOUT); +} + +static irqreturn_t dma_err_handler(int irq, void *dev_id) +{ + int i, disr; + struct imx_dma_channel *imxdma; + unsigned int err_mask; + int errcode; + + disr = __raw_readl(DMA_BASE + DMA_DISR); + + err_mask = __raw_readl(DMA_BASE + DMA_DBTOSR) | + __raw_readl(DMA_BASE + DMA_DRTOSR) | + __raw_readl(DMA_BASE + DMA_DSESR) | + __raw_readl(DMA_BASE + DMA_DBOSR); + + if (!err_mask) + return IRQ_HANDLED; + + __raw_writel(disr & err_mask, DMA_BASE + DMA_DISR); + + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + if (!(err_mask & (1 << i))) + continue; + imxdma = &imx_dma_channels[i]; + errcode = 0; + + if (__raw_readl(DMA_BASE + DMA_DBTOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DBTOSR); + errcode |= IMX_DMA_ERR_BURST; + } + if (__raw_readl(DMA_BASE + DMA_DRTOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DRTOSR); + errcode |= IMX_DMA_ERR_REQUEST; + } + if (__raw_readl(DMA_BASE + DMA_DSESR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DSESR); + errcode |= IMX_DMA_ERR_TRANSFER; + } + if (__raw_readl(DMA_BASE + DMA_DBOSR) & (1 << i)) { + __raw_writel(1 << i, DMA_BASE + DMA_DBOSR); + errcode |= IMX_DMA_ERR_BUFFER; + } + if (imxdma->name && imxdma->err_handler) { + imxdma->err_handler(i, imxdma->data, errcode); + continue; + } + + imx_dma_channels[i].sg = NULL; + + printk(KERN_WARNING + "DMA timeout on channel %d (%s) -%s%s%s%s\n", + i, imxdma->name, + errcode & IMX_DMA_ERR_BURST ? " burst" : "", + errcode & IMX_DMA_ERR_REQUEST ? " request" : "", + errcode & IMX_DMA_ERR_TRANSFER ? " transfer" : "", + errcode & IMX_DMA_ERR_BUFFER ? " buffer" : ""); + } + return IRQ_HANDLED; +} + +static void dma_irq_handle_channel(int chno) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[chno]; + + if (!imxdma->name) { + /* + * IRQ for an unregistered DMA channel: + * let's clear the interrupts and disable it. + */ + printk(KERN_WARNING + "spurious IRQ for DMA channel %d\n", chno); + return; + } + + if (imxdma->sg) { + u32 tmp; + struct scatterlist *current_sg = imxdma->sg; + imxdma->sg = sg_next(imxdma->sg); + + if (imxdma->sg) { + imx_dma_sg_next(chno, imxdma->sg); + + tmp = __raw_readl(DMA_BASE + DMA_CCR(chno)); + + if (imx_dma_hw_chain(imxdma)) { + /* FIXME: The timeout should probably be + * configurable + */ + mod_timer(&imxdma->watchdog, + jiffies + msecs_to_jiffies(500)); + + tmp |= CCR_CEN | CCR_RPT | CCR_ACRPT; + __raw_writel(tmp, DMA_BASE + + DMA_CCR(chno)); + } else { + __raw_writel(tmp & ~CCR_CEN, DMA_BASE + + DMA_CCR(chno)); + tmp |= CCR_CEN; + } + + __raw_writel(tmp, DMA_BASE + DMA_CCR(chno)); + + if (imxdma->prog_handler) + imxdma->prog_handler(chno, imxdma->data, + current_sg); + + return; + } + + if (imx_dma_hw_chain(imxdma)) { + del_timer(&imxdma->watchdog); + return; + } + } + + __raw_writel(0, DMA_BASE + DMA_CCR(chno)); + imxdma->in_use = 0; + if (imxdma->irq_handler) + imxdma->irq_handler(chno, imxdma->data); +} + +static irqreturn_t dma_irq_handler(int irq, void *dev_id) +{ + int i, disr; + +#ifdef CONFIG_ARCH_MX2 + dma_err_handler(irq, dev_id); +#endif + + disr = __raw_readl(DMA_BASE + DMA_DISR); + + pr_debug("imxdma: dma_irq_handler called, disr=0x%08x\n", + disr); + + __raw_writel(disr, DMA_BASE + DMA_DISR); + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + if (disr & (1 << i)) + dma_irq_handle_channel(i); + } + + return IRQ_HANDLED; +} + +/** + * imx_dma_request - request/allocate specified channel number + * @channel: i.MX DMA channel number + * @name: the driver/caller own non-%NULL identification + */ +int imx_dma_request(int channel, const char *name) +{ + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + unsigned long flags; + int ret; + + /* basic sanity checks */ + if (!name) + return -EINVAL; + + if (channel >= IMX_DMA_CHANNELS) { + printk(KERN_CRIT "%s: called for non-existed channel %d\n", + __func__, channel); + return -EINVAL; + } + + local_irq_save(flags); + if (imxdma->name) { + local_irq_restore(flags); + return -EBUSY; + } + +#ifdef CONFIG_ARCH_MX2 + ret = request_irq(MXC_INT_DMACH0 + channel, dma_irq_handler, 0, "DMA", + NULL); + if (ret) { + printk(KERN_CRIT "Can't register IRQ %d for DMA channel %d\n", + MXC_INT_DMACH0 + channel, channel); + return ret; + } + init_timer(&imxdma->watchdog); + imxdma->watchdog.function = &imx_dma_watchdog; + imxdma->watchdog.data = channel; +#endif + + imxdma->name = name; + imxdma->irq_handler = NULL; + imxdma->err_handler = NULL; + imxdma->data = NULL; + imxdma->sg = NULL; + + local_irq_restore(flags); + return 0; +} +EXPORT_SYMBOL(imx_dma_request); + +/** + * imx_dma_free - release previously acquired channel + * @channel: i.MX DMA channel number + */ +void imx_dma_free(int channel) +{ + unsigned long flags; + struct imx_dma_channel *imxdma = &imx_dma_channels[channel]; + + if (!imxdma->name) { + printk(KERN_CRIT + "%s: trying to free free channel %d\n", + __func__, channel); + return; + } + + local_irq_save(flags); + /* Disable interrupts */ + __raw_writel(__raw_readl(DMA_BASE + DMA_DIMR) | (1 << channel), + DMA_BASE + DMA_DIMR); + __raw_writel(__raw_readl(DMA_BASE + DMA_CCR(channel)) & ~CCR_CEN, + DMA_BASE + DMA_CCR(channel)); + imxdma->name = NULL; + +#ifdef CONFIG_ARCH_MX2 + free_irq(MXC_INT_DMACH0 + channel, NULL); +#endif + + local_irq_restore(flags); +} +EXPORT_SYMBOL(imx_dma_free); + +/** + * imx_dma_request_by_prio - find and request some of free channels best + * suiting requested priority + * @channel: i.MX DMA channel number + * @name: the driver/caller own non-%NULL identification + * + * This function tries to find a free channel in the specified priority group + * This function tries to find a free channel in the specified priority group + * if the priority cannot be achieved it tries to look for free channel + * in the higher and then even lower priority groups. + * + * Return value: If there is no free channel to allocate, -%ENODEV is returned. + * On successful allocation channel is returned. + */ +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio) +{ + int i; + int best; + + switch (prio) { + case (DMA_PRIO_HIGH): + best = 8; + break; + case (DMA_PRIO_MEDIUM): + best = 4; + break; + case (DMA_PRIO_LOW): + default: + best = 0; + break; + } + + for (i = best; i < IMX_DMA_CHANNELS; i++) + if (!imx_dma_request(i, name)) + return i; + + for (i = best - 1; i >= 0; i--) + if (!imx_dma_request(i, name)) + return i; + + printk(KERN_ERR "%s: no free DMA channel found\n", __func__); + + return -ENODEV; +} +EXPORT_SYMBOL(imx_dma_request_by_prio); + +static int __init imx_dma_init(void) +{ + int ret = 0; + int i; + + dma_clk = clk_get(NULL, "dma_clk"); + clk_enable(dma_clk); + + /* reset DMA module */ + __raw_writel(DCR_DRST, DMA_BASE + DMA_DCR); + +#ifdef CONFIG_ARCH_MX1 + ret = request_irq(DMA_INT, dma_irq_handler, 0, "DMA", NULL); + if (ret) { + printk(KERN_CRIT "Wow! Can't register IRQ for DMA\n"); + return ret; + } + + ret = request_irq(DMA_ERR, dma_err_handler, 0, "DMA", NULL); + if (ret) { + printk(KERN_CRIT "Wow! Can't register ERRIRQ for DMA\n"); + free_irq(DMA_INT, NULL); + return ret; + } +#endif + /* enable DMA module */ + __raw_writel(DCR_DEN, DMA_BASE + DMA_DCR); + + /* clear all interrupts */ + __raw_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_BASE + DMA_DISR); + + /* disable interrupts */ + __raw_writel((1 << IMX_DMA_CHANNELS) - 1, DMA_BASE + DMA_DIMR); + + for (i = 0; i < IMX_DMA_CHANNELS; i++) { + imx_dma_channels[i].sg = NULL; + imx_dma_channels[i].dma_num = i; + } + + return ret; +} + +arch_initcall(imx_dma_init); diff --git a/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h new file mode 100644 index 00000000000..e85fd946116 --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h @@ -0,0 +1,89 @@ +/* + * linux/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h + * + * i.MX DMA registration and IRQ dispatching + * + * Copyright 2006 Pavel Pisa + * Copyright 2008 Juergen Beisert, + * Copyright 2008 Sascha Hauer, + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#include + +#ifndef __ASM_ARCH_MXC_DMA_H +#define __ASM_ARCH_MXC_DMA_H + +#define IMX_DMA_CHANNELS 16 + +#define DMA_BASE IO_ADDRESS(DMA_BASE_ADDR) + +#define IMX_DMA_MEMSIZE_32 (0 << 4) +#define IMX_DMA_MEMSIZE_8 (1 << 4) +#define IMX_DMA_MEMSIZE_16 (2 << 4) +#define IMX_DMA_TYPE_LINEAR (0 << 10) +#define IMX_DMA_TYPE_2D (1 << 10) +#define IMX_DMA_TYPE_FIFO (2 << 10) + +#define IMX_DMA_ERR_BURST (1 << 0) +#define IMX_DMA_ERR_REQUEST (1 << 1) +#define IMX_DMA_ERR_TRANSFER (1 << 2) +#define IMX_DMA_ERR_BUFFER (1 << 3) +#define IMX_DMA_ERR_TIMEOUT (1 << 4) + +int +imx_dma_config_channel(int channel, unsigned int config_port, + unsigned int config_mem, unsigned int dmareq, int hw_chaining); + +void +imx_dma_config_burstlen(int channel, unsigned int burstlen); + +int +imx_dma_setup_single(int channel, dma_addr_t dma_address, + unsigned int dma_length, unsigned int dev_addr, + dmamode_t dmamode); + +int +imx_dma_setup_sg(int channel, struct scatterlist *sg, + unsigned int sgcount, unsigned int dma_length, + unsigned int dev_addr, dmamode_t dmamode); + +int +imx_dma_setup_handlers(int channel, + void (*irq_handler) (int, void *), + void (*err_handler) (int, void *, int), void *data); + +int +imx_dma_setup_progression_handler(int channel, + void (*prog_handler) (int, void*, struct scatterlist*)); + +void imx_dma_enable(int channel); + +void imx_dma_disable(int channel); + +int imx_dma_request(int channel, const char *name); + +void imx_dma_free(int channel); + +enum imx_dma_prio { + DMA_PRIO_HIGH = 0, + DMA_PRIO_MEDIUM = 1, + DMA_PRIO_LOW = 2 +}; + +int imx_dma_request_by_prio(const char *name, enum imx_dma_prio prio); + +#endif /* _ASM_ARCH_MXC_DMA_H */ -- cgit v1.2.3