ARM: OMAP: Allow platforms to hook reset cleanly
This adds a clean method to allow platforms to hook into the reset code if they require to. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Russell King - ARM Linux
Tony Lindgren
Родитель
277a28567f
Коммит
ee54dba9c3
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@ -4,7 +4,7 @@
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# Common support
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obj-y := io.o id.o sram.o time.o irq.o mux.o flash.o serial.o devices.o dma.o
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obj-y += clock.o clock_data.o opp_data.o
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obj-y += clock.o clock_data.o opp_data.o reset.o
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obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
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@ -26,6 +26,7 @@
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#include <linux/smc91x.h>
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#include <mach/hardware.h>
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#include <mach/system.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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@ -163,52 +164,6 @@ static void __init voiceblue_init_irq(void)
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omap_init_irq();
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}
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static void __init voiceblue_init(void)
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{
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/* mux pins for uarts */
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omap_cfg_reg(UART1_TX);
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omap_cfg_reg(UART1_RTS);
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omap_cfg_reg(UART2_TX);
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omap_cfg_reg(UART2_RTS);
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omap_cfg_reg(UART3_TX);
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omap_cfg_reg(UART3_RX);
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/* Watchdog */
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gpio_request(0, "Watchdog");
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/* smc91x reset */
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gpio_request(7, "SMC91x reset");
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gpio_direction_output(7, 1);
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udelay(2); /* wait at least 100ns */
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gpio_set_value(7, 0);
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mdelay(50); /* 50ms until PHY ready */
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/* smc91x interrupt pin */
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gpio_request(8, "SMC91x irq");
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/* 16C554 reset*/
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gpio_request(6, "16C554 reset");
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gpio_direction_output(6, 0);
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/* 16C554 interrupt pins */
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gpio_request(12, "16C554 irq");
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gpio_request(13, "16C554 irq");
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gpio_request(14, "16C554 irq");
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gpio_request(15, "16C554 irq");
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set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);
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platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
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omap_board_config = voiceblue_config;
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omap_board_config_size = ARRAY_SIZE(voiceblue_config);
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omap_serial_init();
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omap1_usb_init(&voiceblue_usb_config);
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omap_register_i2c_bus(1, 100, NULL, 0);
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/* There is a good chance board is going up, so enable power LED
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* (it is connected through invertor) */
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omap_writeb(0x00, OMAP_LPG1_LCR);
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omap_writeb(0x00, OMAP_LPG1_PMR); /* Disable clock */
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}
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static void __init voiceblue_map_io(void)
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{
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omap1_map_common_io();
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@ -275,8 +230,17 @@ void voiceblue_wdt_ping(void)
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gpio_set_value(0, wdt_gpio_state);
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}
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void voiceblue_reset(void)
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static void voiceblue_reset(char mode, const char *cmd)
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{
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/*
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* Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
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* "Global Software Reset Affects Traffic Controller Frequency".
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*/
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if (cpu_is_omap5912()) {
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omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4), DPLL_CTL);
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omap_writew(0x8, ARM_RSTCT1);
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}
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set_bit(MACHINE_REBOOT, &machine_state);
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voiceblue_wdt_enable();
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while (1) ;
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@ -286,6 +250,54 @@ EXPORT_SYMBOL(voiceblue_wdt_enable);
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EXPORT_SYMBOL(voiceblue_wdt_disable);
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EXPORT_SYMBOL(voiceblue_wdt_ping);
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static void __init voiceblue_init(void)
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{
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/* mux pins for uarts */
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omap_cfg_reg(UART1_TX);
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omap_cfg_reg(UART1_RTS);
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omap_cfg_reg(UART2_TX);
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omap_cfg_reg(UART2_RTS);
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omap_cfg_reg(UART3_TX);
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omap_cfg_reg(UART3_RX);
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/* Watchdog */
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gpio_request(0, "Watchdog");
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/* smc91x reset */
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gpio_request(7, "SMC91x reset");
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gpio_direction_output(7, 1);
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udelay(2); /* wait at least 100ns */
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gpio_set_value(7, 0);
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mdelay(50); /* 50ms until PHY ready */
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/* smc91x interrupt pin */
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gpio_request(8, "SMC91x irq");
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/* 16C554 reset*/
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gpio_request(6, "16C554 reset");
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gpio_direction_output(6, 0);
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/* 16C554 interrupt pins */
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gpio_request(12, "16C554 irq");
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gpio_request(13, "16C554 irq");
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gpio_request(14, "16C554 irq");
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gpio_request(15, "16C554 irq");
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set_irq_type(gpio_to_irq(12), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(13), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(14), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(15), IRQ_TYPE_EDGE_RISING);
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platform_add_devices(voiceblue_devices, ARRAY_SIZE(voiceblue_devices));
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omap_board_config = voiceblue_config;
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omap_board_config_size = ARRAY_SIZE(voiceblue_config);
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omap_serial_init();
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omap1_usb_init(&voiceblue_usb_config);
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omap_register_i2c_bus(1, 100, NULL, 0);
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/* There is a good chance board is going up, so enable power LED
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* (it is connected through invertor) */
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omap_writeb(0x00, OMAP_LPG1_LCR);
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omap_writeb(0x00, OMAP_LPG1_PMR); /* Disable clock */
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arch_reset = voiceblue_reset;
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}
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MACHINE_START(VOICEBLUE, "VoiceBlue OMAP5910")
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/* Maintainer: Ladislav Michl <michl@2n.cz> */
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.boot_params = 0x10000100,
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@ -0,0 +1,25 @@
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/*
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* OMAP1 reset support
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*/
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include <mach/system.h>
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#include <plat/prcm.h>
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void omap1_arch_reset(char mode, const char *cmd)
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{
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/*
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* Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
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* "Global Software Reset Affects Traffic Controller Frequency".
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*/
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if (cpu_is_omap5912()) {
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omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4), DPLL_CTL);
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omap_writew(0x8, ARM_RSTCT1);
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}
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omap_writew(1, ARM_RSTCT1);
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}
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void (*arch_reset)(char, const char *) = omap1_arch_reset;
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@ -24,6 +24,7 @@
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <mach/system.h>
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#include <plat/common.h>
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#include <plat/prcm.h>
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#include <plat/irqs.h>
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@ -57,7 +58,7 @@ u32 omap_prcm_get_reset_sources(void)
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EXPORT_SYMBOL(omap_prcm_get_reset_sources);
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/* Resets clock rates and reboots the system. Only called from system.h */
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void omap_prcm_arch_reset(char mode, const char *cmd)
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static void omap_prcm_arch_reset(char mode, const char *cmd)
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{
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s16 prcm_offs = 0;
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@ -108,6 +109,8 @@ void omap_prcm_arch_reset(char mode, const char *cmd)
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omap2_prm_read_mod_reg(prcm_offs, OMAP2_RM_RSTCTRL); /* OCP barrier */
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}
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void (*arch_reset)(char, const char *) = omap_prcm_arch_reset;
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/**
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* omap2_cm_wait_idlest - wait for IDLEST bit to indicate module readiness
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* @reg: physical address of module IDLEST register
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@ -28,7 +28,6 @@
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#define __ASM_ARM_ARCH_OMAP_PRCM_H
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u32 omap_prcm_get_reset_sources(void);
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void omap_prcm_arch_reset(char mode, const char *cmd);
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int omap2_cm_wait_idlest(void __iomem *reg, u32 mask, u8 idlest,
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const char *name);
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@ -4,48 +4,14 @@
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*/
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#ifndef __ASM_ARCH_SYSTEM_H
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#define __ASM_ARCH_SYSTEM_H
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#include <linux/clk.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <plat/prcm.h>
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#ifndef CONFIG_MACH_VOICEBLUE
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#define voiceblue_reset() do {} while (0)
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#else
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extern void voiceblue_reset(void);
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#endif
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#include <asm/proc-fns.h>
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static inline void arch_idle(void)
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{
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cpu_do_idle();
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}
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static inline void omap1_arch_reset(char mode, const char *cmd)
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{
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/*
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* Workaround for 5912/1611b bug mentioned in sprz209d.pdf p. 28
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* "Global Software Reset Affects Traffic Controller Frequency".
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*/
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if (cpu_is_omap5912()) {
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omap_writew(omap_readw(DPLL_CTL) & ~(1 << 4),
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DPLL_CTL);
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omap_writew(0x8, ARM_RSTCT1);
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}
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if (machine_is_voiceblue())
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voiceblue_reset();
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else
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omap_writew(1, ARM_RSTCT1);
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}
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static inline void arch_reset(char mode, const char *cmd)
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{
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if (!cpu_class_is_omap2())
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omap1_arch_reset(mode, cmd);
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else
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omap_prcm_arch_reset(mode, cmd);
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}
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extern void (*arch_reset)(char, const char *);
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#endif
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