From dcd83aaff1c8cbd5b48c152b559e0af3ea1a7b65 Mon Sep 17 00:00:00 2001 From: Timur Tabi Date: Fri, 8 Jul 2011 19:06:12 -0500 Subject: tty/powerpc: introduce the ePAPR embedded hypervisor byte channel driver The ePAPR embedded hypervisor specification provides an API for "byte channels", which are serial-like virtual devices for sending and receiving streams of bytes. This driver provides Linux kernel support for byte channels via three distinct interfaces: 1) An early-console (udbg) driver. This provides early console output through a byte channel. The byte channel handle must be specified in a Kconfig option. 2) A normal console driver. Output is sent to the byte channel designated for stdout in the device tree. The console driver is for handling kernel printk calls. 3) A tty driver, which is used to handle user-space input and output. The byte channel used for the console is designated as the default tty. Signed-off-by: Timur Tabi Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/include/asm/udbg.h | 1 + arch/powerpc/kernel/udbg.c | 2 ++ 2 files changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/powerpc/include/asm/udbg.h b/arch/powerpc/include/asm/udbg.h index 93e05d1b34b2..5354ae91bdde 100644 --- a/arch/powerpc/include/asm/udbg.h +++ b/arch/powerpc/include/asm/udbg.h @@ -54,6 +54,7 @@ extern void __init udbg_init_40x_realmode(void); extern void __init udbg_init_cpm(void); extern void __init udbg_init_usbgecko(void); extern void __init udbg_init_wsp(void); +extern void __init udbg_init_ehv_bc(void); #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_UDBG_H */ diff --git a/arch/powerpc/kernel/udbg.c b/arch/powerpc/kernel/udbg.c index faa82c1f3f68..b4607a91d1f4 100644 --- a/arch/powerpc/kernel/udbg.c +++ b/arch/powerpc/kernel/udbg.c @@ -67,6 +67,8 @@ void __init udbg_early_init(void) udbg_init_usbgecko(); #elif defined(CONFIG_PPC_EARLY_DEBUG_WSP) udbg_init_wsp(); +#elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC) + udbg_init_ehv_bc(); #endif #ifdef CONFIG_PPC_EARLY_DEBUG -- cgit v1.2.3 From 2a8d7bddf273477d6aa81405c9b4bae223e11ed9 Mon Sep 17 00:00:00 2001 From: Thomas Abraham Date: Wed, 10 Aug 2011 15:51:20 +0530 Subject: ARM: SAMSUNG: Remove uart irq handling from plaform code With uart tx/rx/err interrupt handling moved into the driver for s3c64xx and later SoC's, the uart interrupt handling in plaform code can be removed. The uart device irq resources is reduced to one and the related unused macros are removed. Suggested-by: Grant Likely CC: Ben Dooks Signed-off-by: Thomas Abraham Signed-off-by: Greg Kroah-Hartman --- arch/arm/Kconfig | 1 - arch/arm/mach-s3c64xx/dev-uart.c | 60 ++------------- arch/arm/mach-s3c64xx/include/mach/irqs.h | 30 -------- arch/arm/mach-s3c64xx/irq.c | 25 ------ arch/arm/plat-s5p/Kconfig | 1 - arch/arm/plat-s5p/dev-uart.c | 84 +++------------------ arch/arm/plat-s5p/include/plat/irqs.h | 35 --------- arch/arm/plat-s5p/irq.c | 34 --------- arch/arm/plat-samsung/Kconfig | 5 -- arch/arm/plat-samsung/Makefile | 1 - arch/arm/plat-samsung/include/plat/regs-serial.h | 5 ++ arch/arm/plat-samsung/irq-uart.c | 96 ------------------------ 12 files changed, 25 insertions(+), 352 deletions(-) delete mode 100644 arch/arm/plat-samsung/irq-uart.c (limited to 'arch') diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 5ebc5d922ea1..325d2f55744d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -722,7 +722,6 @@ config ARCH_S3C64XX select ARCH_REQUIRE_GPIOLIB select SAMSUNG_CLKSRC select SAMSUNG_IRQ_VIC_TIMER - select SAMSUNG_IRQ_UART select S3C_GPIO_TRACK select S3C_GPIO_PULL_UPDOWN select S3C_GPIO_CFG_S3C24XX diff --git a/arch/arm/mach-s3c64xx/dev-uart.c b/arch/arm/mach-s3c64xx/dev-uart.c index f797f748b999..c681b99eda08 100644 --- a/arch/arm/mach-s3c64xx/dev-uart.c +++ b/arch/arm/mach-s3c64xx/dev-uart.c @@ -37,21 +37,10 @@ static struct resource s3c64xx_uart0_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S3CUART_RX0, - .end = IRQ_S3CUART_RX0, + .start = IRQ_UART0, + .end = IRQ_UART0, .flags = IORESOURCE_IRQ, }, - [2] = { - .start = IRQ_S3CUART_TX0, - .end = IRQ_S3CUART_TX0, - .flags = IORESOURCE_IRQ, - - }, - [3] = { - .start = IRQ_S3CUART_ERR0, - .end = IRQ_S3CUART_ERR0, - .flags = IORESOURCE_IRQ, - } }; static struct resource s3c64xx_uart1_resource[] = { @@ -61,19 +50,8 @@ static struct resource s3c64xx_uart1_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S3CUART_RX1, - .end = IRQ_S3CUART_RX1, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S3CUART_TX1, - .end = IRQ_S3CUART_TX1, - .flags = IORESOURCE_IRQ, - - }, - [3] = { - .start = IRQ_S3CUART_ERR1, - .end = IRQ_S3CUART_ERR1, + .start = IRQ_UART1, + .end = IRQ_UART1, .flags = IORESOURCE_IRQ, }, }; @@ -85,19 +63,8 @@ static struct resource s3c6xx_uart2_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S3CUART_RX2, - .end = IRQ_S3CUART_RX2, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S3CUART_TX2, - .end = IRQ_S3CUART_TX2, - .flags = IORESOURCE_IRQ, - - }, - [3] = { - .start = IRQ_S3CUART_ERR2, - .end = IRQ_S3CUART_ERR2, + .start = IRQ_UART2, + .end = IRQ_UART2, .flags = IORESOURCE_IRQ, }, }; @@ -109,19 +76,8 @@ static struct resource s3c64xx_uart3_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S3CUART_RX3, - .end = IRQ_S3CUART_RX3, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S3CUART_TX3, - .end = IRQ_S3CUART_TX3, - .flags = IORESOURCE_IRQ, - - }, - [3] = { - .start = IRQ_S3CUART_ERR3, - .end = IRQ_S3CUART_ERR3, + .start = IRQ_UART3, + .end = IRQ_UART3, .flags = IORESOURCE_IRQ, }, }; diff --git a/arch/arm/mach-s3c64xx/include/mach/irqs.h b/arch/arm/mach-s3c64xx/include/mach/irqs.h index c026f67a80de..443f85b3c203 100644 --- a/arch/arm/mach-s3c64xx/include/mach/irqs.h +++ b/arch/arm/mach-s3c64xx/include/mach/irqs.h @@ -27,36 +27,6 @@ #define IRQ_VIC0_BASE S3C_IRQ(0) #define IRQ_VIC1_BASE S3C_IRQ(32) -/* UART interrupts, each UART has 4 intterupts per channel so - * use the space between the ISA and S3C main interrupts. Note, these - * are not in the same order as the S3C24XX series! */ - -#define IRQ_S3CUART_BASE0 (16) -#define IRQ_S3CUART_BASE1 (20) -#define IRQ_S3CUART_BASE2 (24) -#define IRQ_S3CUART_BASE3 (28) - -#define UART_IRQ_RXD (0) -#define UART_IRQ_ERR (1) -#define UART_IRQ_TXD (2) -#define UART_IRQ_MODEM (3) - -#define IRQ_S3CUART_RX0 (IRQ_S3CUART_BASE0 + UART_IRQ_RXD) -#define IRQ_S3CUART_TX0 (IRQ_S3CUART_BASE0 + UART_IRQ_TXD) -#define IRQ_S3CUART_ERR0 (IRQ_S3CUART_BASE0 + UART_IRQ_ERR) - -#define IRQ_S3CUART_RX1 (IRQ_S3CUART_BASE1 + UART_IRQ_RXD) -#define IRQ_S3CUART_TX1 (IRQ_S3CUART_BASE1 + UART_IRQ_TXD) -#define IRQ_S3CUART_ERR1 (IRQ_S3CUART_BASE1 + UART_IRQ_ERR) - -#define IRQ_S3CUART_RX2 (IRQ_S3CUART_BASE2 + UART_IRQ_RXD) -#define IRQ_S3CUART_TX2 (IRQ_S3CUART_BASE2 + UART_IRQ_TXD) -#define IRQ_S3CUART_ERR2 (IRQ_S3CUART_BASE2 + UART_IRQ_ERR) - -#define IRQ_S3CUART_RX3 (IRQ_S3CUART_BASE3 + UART_IRQ_RXD) -#define IRQ_S3CUART_TX3 (IRQ_S3CUART_BASE3 + UART_IRQ_TXD) -#define IRQ_S3CUART_ERR3 (IRQ_S3CUART_BASE3 + UART_IRQ_ERR) - /* VIC based IRQs */ #define S3C64XX_IRQ_VIC0(x) (IRQ_VIC0_BASE + (x)) diff --git a/arch/arm/mach-s3c64xx/irq.c b/arch/arm/mach-s3c64xx/irq.c index 75d9a0e49193..b07357e94958 100644 --- a/arch/arm/mach-s3c64xx/irq.c +++ b/arch/arm/mach-s3c64xx/irq.c @@ -25,29 +25,6 @@ #include #include -static struct s3c_uart_irq uart_irqs[] = { - [0] = { - .regs = S3C_VA_UART0, - .base_irq = IRQ_S3CUART_BASE0, - .parent_irq = IRQ_UART0, - }, - [1] = { - .regs = S3C_VA_UART1, - .base_irq = IRQ_S3CUART_BASE1, - .parent_irq = IRQ_UART1, - }, - [2] = { - .regs = S3C_VA_UART2, - .base_irq = IRQ_S3CUART_BASE2, - .parent_irq = IRQ_UART2, - }, - [3] = { - .regs = S3C_VA_UART3, - .base_irq = IRQ_S3CUART_BASE3, - .parent_irq = IRQ_UART3, - }, -}; - /* setup the sources the vic should advertise resume for, even though it * is not doing the wake (set_irq_wake needs to be valid) */ #define IRQ_VIC0_RESUME (1 << (IRQ_RTC_TIC - IRQ_VIC0_BASE)) @@ -67,6 +44,4 @@ void __init s3c64xx_init_irq(u32 vic0_valid, u32 vic1_valid) /* add the timer sub-irqs */ s3c_init_vic_timer_irq(5, IRQ_TIMER0); - - s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs)); } diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig index 9843c954c042..9a197e55f669 100644 --- a/arch/arm/plat-s5p/Kconfig +++ b/arch/arm/plat-s5p/Kconfig @@ -22,7 +22,6 @@ config PLAT_S5P select PLAT_SAMSUNG select SAMSUNG_CLKSRC select SAMSUNG_IRQ_VIC_TIMER - select SAMSUNG_IRQ_UART help Base platform code for Samsung's S5P series SoC. diff --git a/arch/arm/plat-s5p/dev-uart.c b/arch/arm/plat-s5p/dev-uart.c index afaf87fdb93e..c9308db36183 100644 --- a/arch/arm/plat-s5p/dev-uart.c +++ b/arch/arm/plat-s5p/dev-uart.c @@ -32,20 +32,10 @@ static struct resource s5p_uart0_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX0, - .end = IRQ_S5P_UART_RX0, + .start = IRQ_UART0, + .end = IRQ_UART0, .flags = IORESOURCE_IRQ, }, - [2] = { - .start = IRQ_S5P_UART_TX0, - .end = IRQ_S5P_UART_TX0, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR0, - .end = IRQ_S5P_UART_ERR0, - .flags = IORESOURCE_IRQ, - } }; static struct resource s5p_uart1_resource[] = { @@ -55,18 +45,8 @@ static struct resource s5p_uart1_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX1, - .end = IRQ_S5P_UART_RX1, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S5P_UART_TX1, - .end = IRQ_S5P_UART_TX1, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR1, - .end = IRQ_S5P_UART_ERR1, + .start = IRQ_UART1, + .end = IRQ_UART1, .flags = IORESOURCE_IRQ, }, }; @@ -78,18 +58,8 @@ static struct resource s5p_uart2_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX2, - .end = IRQ_S5P_UART_RX2, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S5P_UART_TX2, - .end = IRQ_S5P_UART_TX2, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR2, - .end = IRQ_S5P_UART_ERR2, + .start = IRQ_UART2, + .end = IRQ_UART2, .flags = IORESOURCE_IRQ, }, }; @@ -102,18 +72,8 @@ static struct resource s5p_uart3_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX3, - .end = IRQ_S5P_UART_RX3, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S5P_UART_TX3, - .end = IRQ_S5P_UART_TX3, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR3, - .end = IRQ_S5P_UART_ERR3, + .start = IRQ_UART3, + .end = IRQ_UART3, .flags = IORESOURCE_IRQ, }, #endif @@ -127,18 +87,8 @@ static struct resource s5p_uart4_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX4, - .end = IRQ_S5P_UART_RX4, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S5P_UART_TX4, - .end = IRQ_S5P_UART_TX4, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR4, - .end = IRQ_S5P_UART_ERR4, + .start = IRQ_UART4, + .end = IRQ_UART4, .flags = IORESOURCE_IRQ, }, #endif @@ -152,18 +102,8 @@ static struct resource s5p_uart5_resource[] = { .flags = IORESOURCE_MEM, }, [1] = { - .start = IRQ_S5P_UART_RX5, - .end = IRQ_S5P_UART_RX5, - .flags = IORESOURCE_IRQ, - }, - [2] = { - .start = IRQ_S5P_UART_TX5, - .end = IRQ_S5P_UART_TX5, - .flags = IORESOURCE_IRQ, - }, - [3] = { - .start = IRQ_S5P_UART_ERR5, - .end = IRQ_S5P_UART_ERR5, + .start = IRQ_UART5, + .end = IRQ_UART5, .flags = IORESOURCE_IRQ, }, #endif diff --git a/arch/arm/plat-s5p/include/plat/irqs.h b/arch/arm/plat-s5p/include/plat/irqs.h index ba9121c60a2a..144dbfc6506d 100644 --- a/arch/arm/plat-s5p/include/plat/irqs.h +++ b/arch/arm/plat-s5p/include/plat/irqs.h @@ -37,41 +37,6 @@ #define IRQ_VIC1_BASE S5P_VIC1_BASE #define IRQ_VIC2_BASE S5P_VIC2_BASE -/* UART interrupts, each UART has 4 intterupts per channel so - * use the space between the ISA and S3C main interrupts. Note, these - * are not in the same order as the S3C24XX series! */ - -#define IRQ_S5P_UART_BASE0 (16) -#define IRQ_S5P_UART_BASE1 (20) -#define IRQ_S5P_UART_BASE2 (24) -#define IRQ_S5P_UART_BASE3 (28) - -#define UART_IRQ_RXD (0) -#define UART_IRQ_ERR (1) -#define UART_IRQ_TXD (2) - -#define IRQ_S5P_UART_RX0 (IRQ_S5P_UART_BASE0 + UART_IRQ_RXD) -#define IRQ_S5P_UART_TX0 (IRQ_S5P_UART_BASE0 + UART_IRQ_TXD) -#define IRQ_S5P_UART_ERR0 (IRQ_S5P_UART_BASE0 + UART_IRQ_ERR) - -#define IRQ_S5P_UART_RX1 (IRQ_S5P_UART_BASE1 + UART_IRQ_RXD) -#define IRQ_S5P_UART_TX1 (IRQ_S5P_UART_BASE1 + UART_IRQ_TXD) -#define IRQ_S5P_UART_ERR1 (IRQ_S5P_UART_BASE1 + UART_IRQ_ERR) - -#define IRQ_S5P_UART_RX2 (IRQ_S5P_UART_BASE2 + UART_IRQ_RXD) -#define IRQ_S5P_UART_TX2 (IRQ_S5P_UART_BASE2 + UART_IRQ_TXD) -#define IRQ_S5P_UART_ERR2 (IRQ_S5P_UART_BASE2 + UART_IRQ_ERR) - -#define IRQ_S5P_UART_RX3 (IRQ_S5P_UART_BASE3 + UART_IRQ_RXD) -#define IRQ_S5P_UART_TX3 (IRQ_S5P_UART_BASE3 + UART_IRQ_TXD) -#define IRQ_S5P_UART_ERR3 (IRQ_S5P_UART_BASE3 + UART_IRQ_ERR) - -/* S3C compatibilty defines */ -#define IRQ_S3CUART_RX0 IRQ_S5P_UART_RX0 -#define IRQ_S3CUART_RX1 IRQ_S5P_UART_RX1 -#define IRQ_S3CUART_RX2 IRQ_S5P_UART_RX2 -#define IRQ_S3CUART_RX3 IRQ_S5P_UART_RX3 - /* VIC based IRQs */ #define S5P_IRQ_VIC0(x) (S5P_VIC0_BASE + (x)) diff --git a/arch/arm/plat-s5p/irq.c b/arch/arm/plat-s5p/irq.c index a97c08957f49..afdaa1082b9f 100644 --- a/arch/arm/plat-s5p/irq.c +++ b/arch/arm/plat-s5p/irq.c @@ -17,42 +17,10 @@ #include -#include #include #include -#include #include #include -#include - -/* - * Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3] - * are consecutive when looking up the interrupt in the demux routines. - */ -static struct s3c_uart_irq uart_irqs[] = { - [0] = { - .regs = S5P_VA_UART0, - .base_irq = IRQ_S5P_UART_BASE0, - .parent_irq = IRQ_UART0, - }, - [1] = { - .regs = S5P_VA_UART1, - .base_irq = IRQ_S5P_UART_BASE1, - .parent_irq = IRQ_UART1, - }, - [2] = { - .regs = S5P_VA_UART2, - .base_irq = IRQ_S5P_UART_BASE2, - .parent_irq = IRQ_UART2, - }, -#if CONFIG_SERIAL_SAMSUNG_UARTS > 3 - [3] = { - .regs = S5P_VA_UART3, - .base_irq = IRQ_S5P_UART_BASE3, - .parent_irq = IRQ_UART3, - }, -#endif -}; void __init s5p_init_irq(u32 *vic, u32 num_vic) { @@ -65,6 +33,4 @@ void __init s5p_init_irq(u32 *vic, u32 num_vic) #endif s3c_init_vic_timer_irq(5, IRQ_TIMER0); - - s3c_init_uart_irqs(uart_irqs, ARRAY_SIZE(uart_irqs)); } diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig index b3e10659e4b8..dffa37bc4a0b 100644 --- a/arch/arm/plat-samsung/Kconfig +++ b/arch/arm/plat-samsung/Kconfig @@ -65,11 +65,6 @@ config SAMSUNG_IRQ_VIC_TIMER help Internal configuration to build the VIC timer interrupt code. -config SAMSUNG_IRQ_UART - bool - help - Internal configuration to build the IRQ UART demux code. - # options for gpio configuration support config SAMSUNG_GPIOLIB_4BIT diff --git a/arch/arm/plat-samsung/Makefile b/arch/arm/plat-samsung/Makefile index 853764ba8cc5..1105922342fe 100644 --- a/arch/arm/plat-samsung/Makefile +++ b/arch/arm/plat-samsung/Makefile @@ -21,7 +21,6 @@ obj-y += dev-asocdma.o obj-$(CONFIG_SAMSUNG_CLKSRC) += clock-clksrc.o -obj-$(CONFIG_SAMSUNG_IRQ_UART) += irq-uart.o obj-$(CONFIG_SAMSUNG_IRQ_VIC_TIMER) += irq-vic-timer.o # ADC diff --git a/arch/arm/plat-samsung/include/plat/regs-serial.h b/arch/arm/plat-samsung/include/plat/regs-serial.h index bac36fa3becb..720734847027 100644 --- a/arch/arm/plat-samsung/include/plat/regs-serial.h +++ b/arch/arm/plat-samsung/include/plat/regs-serial.h @@ -186,6 +186,11 @@ #define S3C64XX_UINTSP 0x34 #define S3C64XX_UINTM 0x38 +#define S3C64XX_UINTM_RXD (0) +#define S3C64XX_UINTM_TXD (2) +#define S3C64XX_UINTM_RXD_MSK (1 << S3C64XX_UINTM_RXD) +#define S3C64XX_UINTM_TXD_MSK (1 << S3C64XX_UINTM_TXD) + /* Following are specific to S5PV210 */ #define S5PV210_UCON_CLKMASK (1<<10) #define S5PV210_UCON_PCLK (0<<10) diff --git a/arch/arm/plat-samsung/irq-uart.c b/arch/arm/plat-samsung/irq-uart.c deleted file mode 100644 index 3014c7226bd1..000000000000 --- a/arch/arm/plat-samsung/irq-uart.c +++ /dev/null @@ -1,96 +0,0 @@ -/* arch/arm/plat-samsung/irq-uart.c - * originally part of arch/arm/plat-s3c64xx/irq.c - * - * Copyright 2008 Openmoko, Inc. - * Copyright 2008 Simtec Electronics - * Ben Dooks - * http://armlinux.simtec.co.uk/ - * - * Samsung- UART Interrupt handling - * - * 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 -#include -#include -#include -#include - -#include - -#include -#include -#include -#include - -/* Note, we make use of the fact that the parent IRQs, IRQ_UART[0..3] - * are consecutive when looking up the interrupt in the demux routines. - */ -static void s3c_irq_demux_uart(unsigned int irq, struct irq_desc *desc) -{ - struct s3c_uart_irq *uirq = desc->irq_data.handler_data; - struct irq_chip *chip = irq_get_chip(irq); - u32 pend = __raw_readl(uirq->regs + S3C64XX_UINTP); - int base = uirq->base_irq; - - chained_irq_enter(chip, desc); - - if (pend & (1 << 0)) - generic_handle_irq(base); - if (pend & (1 << 1)) - generic_handle_irq(base + 1); - if (pend & (1 << 2)) - generic_handle_irq(base + 2); - if (pend & (1 << 3)) - generic_handle_irq(base + 3); - - chained_irq_exit(chip, desc); -} - -static void __init s3c_init_uart_irq(struct s3c_uart_irq *uirq) -{ - void __iomem *reg_base = uirq->regs; - struct irq_chip_generic *gc; - struct irq_chip_type *ct; - - /* mask all interrupts at the start. */ - __raw_writel(0xf, reg_base + S3C64XX_UINTM); - - gc = irq_alloc_generic_chip("s3c-uart", 1, uirq->base_irq, reg_base, - handle_level_irq); - - if (!gc) { - pr_err("%s: irq_alloc_generic_chip for IRQ %u failed\n", - __func__, uirq->base_irq); - return; - } - - ct = gc->chip_types; - ct->chip.irq_ack = irq_gc_ack_set_bit; - ct->chip.irq_mask = irq_gc_mask_set_bit; - ct->chip.irq_unmask = irq_gc_mask_clr_bit; - ct->regs.ack = S3C64XX_UINTP; - ct->regs.mask = S3C64XX_UINTM; - irq_setup_generic_chip(gc, IRQ_MSK(4), IRQ_GC_INIT_MASK_CACHE, - IRQ_NOREQUEST | IRQ_NOPROBE, 0); - - irq_set_handler_data(uirq->parent_irq, uirq); - irq_set_chained_handler(uirq->parent_irq, s3c_irq_demux_uart); -} - -/** - * s3c_init_uart_irqs() - initialise UART IRQs and the necessary demuxing - * @irq: The interrupt data for registering - * @nr_irqs: The number of interrupt descriptions in @irq. - * - * Register the UART interrupts specified by @irq including the demuxing - * routines. This supports the S3C6400 and newer style of devices. - */ -void __init s3c_init_uart_irqs(struct s3c_uart_irq *irq, unsigned int nr_irqs) -{ - for (; nr_irqs > 0; nr_irqs--, irq++) - s3c_init_uart_irq(irq); -} -- cgit v1.2.3 From 91e8db593c0a2d8249ac00422af1ed42537a3b16 Mon Sep 17 00:00:00 2001 From: Jamie Iles Date: Mon, 15 Aug 2011 10:17:53 +0100 Subject: mips: msp71xx/serial: convert to pr_foo() helpers Convert to pr_foo() helpers rather than printk(KERN_.*). Acked-by: Ralf Baechle Acked-by: Anoop P A Acked-by: Alan Cox Signed-off-by: Jamie Iles Signed-off-by: Greg Kroah-Hartman --- arch/mips/pmc-sierra/msp71xx/msp_serial.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch') diff --git a/arch/mips/pmc-sierra/msp71xx/msp_serial.c b/arch/mips/pmc-sierra/msp71xx/msp_serial.c index f7261628d8a6..c3247b5801f1 100644 --- a/arch/mips/pmc-sierra/msp71xx/msp_serial.c +++ b/arch/mips/pmc-sierra/msp71xx/msp_serial.c @@ -65,7 +65,7 @@ void __init msp_serial_setup(void) up.line = 0; up.private_data = (void*)UART0_STATUS_REG; if (early_serial_setup(&up)) - printk(KERN_ERR "Early serial init of port 0 failed\n"); + pr_err("Early serial init of port 0 failed\n"); /* Initialize the second serial port, if one exists */ switch (mips_machtype) { @@ -89,5 +89,5 @@ void __init msp_serial_setup(void) up.line = 1; up.private_data = (void*)UART1_STATUS_REG; if (early_serial_setup(&up)) - printk(KERN_ERR "Early serial init of port 1 failed\n"); + pr_err("Early serial init of port 1 failed\n"); } -- cgit v1.2.3 From 03972fc21410907fa20d1442c4b073f034423d5c Mon Sep 17 00:00:00 2001 From: Jamie Iles Date: Mon, 15 Aug 2011 10:17:54 +0100 Subject: mips: msp71xx/serial: add workaround for DW UART The Synopsys DesignWare UART in pmc-sierra msp71xx has an extra feature where the UART detects a write attempt to the LCR whilst busy and raises an interrupt. The driver needs to clear the interrupt and rewrite the LCR. Move this into platform code and out of the 8250 driver. Acked-by: Ralf Baechle Acked-by: Alan Cox Signed-off-by: Jamie Iles Signed-off-by: Greg Kroah-Hartman --- arch/mips/pmc-sierra/msp71xx/msp_serial.c | 69 +++++++++++++++++++++++++++++-- 1 file changed, 65 insertions(+), 4 deletions(-) (limited to 'arch') diff --git a/arch/mips/pmc-sierra/msp71xx/msp_serial.c b/arch/mips/pmc-sierra/msp71xx/msp_serial.c index c3247b5801f1..a1c7c7da2336 100644 --- a/arch/mips/pmc-sierra/msp71xx/msp_serial.c +++ b/arch/mips/pmc-sierra/msp71xx/msp_serial.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include @@ -38,6 +39,55 @@ #include #include +struct msp_uart_data { + int last_lcr; +}; + +static void msp_serial_out(struct uart_port *p, int offset, int value) +{ + struct msp_uart_data *d = p->private_data; + + if (offset == UART_LCR) + d->last_lcr = value; + + offset <<= p->regshift; + writeb(value, p->membase + offset); +} + +static unsigned int msp_serial_in(struct uart_port *p, int offset) +{ + offset <<= p->regshift; + + return readb(p->membase + offset); +} + +static int msp_serial_handle_irq(struct uart_port *p) +{ + struct msp_uart_data *d = p->private_data; + unsigned int iir = readb(p->membase + (UART_IIR << p->regshift)); + + if (serial8250_handle_irq(p, iir)) { + return 1; + } else if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) { + /* + * The DesignWare APB UART has an Busy Detect (0x07) interrupt + * meaning an LCR write attempt occurred while the UART was + * busy. The interrupt must be cleared by reading the UART + * status register (USR) and the LCR re-written. + * + * Note: MSP reserves 0x20 bytes of address space for the UART + * and the USR is mapped in a separate block at an offset of + * 0xc0 from the start of the UART. + */ + (void)readb(p->membase + 0xc0); + writeb(d->last_lcr, p->membase + (UART_LCR << p->regshift)); + + return 1; + } + + return 0; +} + void __init msp_serial_setup(void) { char *s; @@ -59,13 +109,22 @@ void __init msp_serial_setup(void) up.irq = MSP_INT_UART0; up.uartclk = uartclk; up.regshift = 2; - up.iotype = UPIO_DWAPB; /* UPIO_MEM like */ + up.iotype = UPIO_MEM; up.flags = ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST; up.type = PORT_16550A; up.line = 0; - up.private_data = (void*)UART0_STATUS_REG; - if (early_serial_setup(&up)) + up.serial_out = msp_serial_out; + up.serial_in = msp_serial_in; + up.handle_irq = msp_serial_handle_irq; + up.private_data = kzalloc(sizeof(struct msp_uart_data), GFP_KERNEL); + if (!up.private_data) { + pr_err("failed to allocate uart private data\n"); + return; + } + if (early_serial_setup(&up)) { + kfree(up.private_data); pr_err("Early serial init of port 0 failed\n"); + } /* Initialize the second serial port, if one exists */ switch (mips_machtype) { @@ -88,6 +147,8 @@ void __init msp_serial_setup(void) up.irq = MSP_INT_UART1; up.line = 1; up.private_data = (void*)UART1_STATUS_REG; - if (early_serial_setup(&up)) + if (early_serial_setup(&up)) { + kfree(up.private_data); pr_err("Early serial init of port 1 failed\n"); + } } -- cgit v1.2.3 From efe3ed9837fd2f9679659673f1d2078f1597bf18 Mon Sep 17 00:00:00 2001 From: Feng Tang Date: Fri, 26 Aug 2011 11:25:14 +0100 Subject: x86/mrst: Add platform data for Max3110 devices Those info will be used when spi controller driver setup max3110 as a slave device Signed-off-by: Feng Tang Signed-off-by: Alan Cox Signed-off-by: Dirk Brandewie Signed-off-by: Greg Kroah-Hartman --- arch/x86/platform/mrst/mrst.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch') diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c index 7000e74b3087..b8da1b968998 100644 --- a/arch/x86/platform/mrst/mrst.c +++ b/arch/x86/platform/mrst/mrst.c @@ -14,6 +14,8 @@ #include #include +#include +#include #include #include #include @@ -392,6 +394,7 @@ static void __init *max3111_platform_data(void *info) struct spi_board_info *spi_info = info; int intr = get_gpio_by_name("max3111_int"); + spi_info->mode = SPI_MODE_0; if (intr == -1) return NULL; spi_info->irq = intr + MRST_IRQ_OFFSET; -- cgit v1.2.3 From a4a77b1af865454bba0539d43c18e03d7a005d64 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Tue, 11 Oct 2011 13:23:29 +0200 Subject: h8300: drivers/serial/Kconfig was moved commit ab4382d27412e7e3e7c936e8d50d8888dfac3df8 moved drivers/serial/Kconfig to drivers/tty/serial/Kconfig, so we need to source the latter file. Signed-off-by: Paul Bolle Signed-off-by: Greg Kroah-Hartman --- arch/h8300/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 091ed6192ae8..2b1eee7198c7 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -195,7 +195,7 @@ config UNIX98_PTYS source "drivers/char/pcmcia/Kconfig" -source "drivers/serial/Kconfig" +source "drivers/tty/serial/Kconfig" source "drivers/i2c/Kconfig" -- cgit v1.2.3