forked from Minki/linux
6de714c21a
Make sure the RTC-interrupts are masked at boot by adding a new helper function to be used at SOC-init. This fixes hanged boot on all AT91 SOCs with an RTC (but RM9200), for example, after a reset during an RTC-update or if an RTC-alarm goes off after shutdown (e.g. when using RTC wakeup). The RTC and RTT-peripherals are powered by backup power (VDDBU) (on all AT91 SOCs but RM9200) and are not reset on wake-up, user, watchdog or software reset. This means that their interrupts may be enabled during early boot if, for example, they where not disabled during a previous shutdown (e.g. due to a buggy driver or a non-clean shutdown such as a user reset). Furthermore, an RTC or RTT-alarm may also be active. The RTC and RTT-interrupts use the shared system-interrupt line, which is also used by the PIT, and if an interrupt occurs before a handler (e.g. RTC-driver) has been installed this leads to the system interrupt being disabled and prevents the system from booting. Note that when boot hangs due to an early RTC or RTT-interrupt, the only way to get the system to start again is to remove the backup power (e.g. battery) or to disable the interrupt manually from the bootloader. In particular, a user reset is not sufficient. Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: stable@vger.kernel.org # 3.11.x
339 lines
8.8 KiB
C
339 lines
8.8 KiB
C
/*
|
|
* Chip-specific setup code for the AT91SAM9x5 family
|
|
*
|
|
* Copyright (C) 2010-2012 Atmel Corporation.
|
|
*
|
|
* Licensed under GPLv2 or later.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <mach/at91sam9x5.h>
|
|
#include <mach/at91_pmc.h>
|
|
#include <mach/cpu.h>
|
|
|
|
#include "board.h"
|
|
#include "soc.h"
|
|
#include "generic.h"
|
|
#include "clock.h"
|
|
#include "sam9_smc.h"
|
|
|
|
/* --------------------------------------------------------------------
|
|
* Clocks
|
|
* -------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* The peripheral clocks.
|
|
*/
|
|
static struct clk pioAB_clk = {
|
|
.name = "pioAB_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_PIOAB,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pioCD_clk = {
|
|
.name = "pioCD_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_PIOCD,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk smd_clk = {
|
|
.name = "smd_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_SMD,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart0_clk = {
|
|
.name = "usart0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_USART0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart1_clk = {
|
|
.name = "usart1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_USART1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart2_clk = {
|
|
.name = "usart2_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_USART2,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* USART3 clock - Only for sam9g25/sam9x25 */
|
|
static struct clk usart3_clk = {
|
|
.name = "usart3_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_USART3,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk twi0_clk = {
|
|
.name = "twi0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_TWI0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk twi1_clk = {
|
|
.name = "twi1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_TWI1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk twi2_clk = {
|
|
.name = "twi2_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_TWI2,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk mmc0_clk = {
|
|
.name = "mci0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_MCI0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk spi0_clk = {
|
|
.name = "spi0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_SPI0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk spi1_clk = {
|
|
.name = "spi1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_SPI1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk uart0_clk = {
|
|
.name = "uart0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_UART0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk uart1_clk = {
|
|
.name = "uart1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_UART1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk tcb0_clk = {
|
|
.name = "tcb0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_TCB,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pwm_clk = {
|
|
.name = "pwm_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_PWM,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk adc_clk = {
|
|
.name = "adc_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_ADC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk adc_op_clk = {
|
|
.name = "adc_op_clk",
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
.rate_hz = 5000000,
|
|
};
|
|
static struct clk dma0_clk = {
|
|
.name = "dma0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_DMA0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk dma1_clk = {
|
|
.name = "dma1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_DMA1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk uhphs_clk = {
|
|
.name = "uhphs",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_UHPHS,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk udphs_clk = {
|
|
.name = "udphs_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_UDPHS,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* emac0 clock - Only for sam9g25/sam9x25/sam9g35/sam9x35 */
|
|
static struct clk macb0_clk = {
|
|
.name = "pclk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_EMAC0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* lcd clock - Only for sam9g15/sam9g35/sam9x35 */
|
|
static struct clk lcdc_clk = {
|
|
.name = "lcdc_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_LCDC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* isi clock - Only for sam9g25 */
|
|
static struct clk isi_clk = {
|
|
.name = "isi_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_ISI,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk mmc1_clk = {
|
|
.name = "mci1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_MCI1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* emac1 clock - Only for sam9x25 */
|
|
static struct clk macb1_clk = {
|
|
.name = "pclk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_EMAC1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk ssc_clk = {
|
|
.name = "ssc_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_SSC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* can0 clock - Only for sam9x35 */
|
|
static struct clk can0_clk = {
|
|
.name = "can0_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_CAN0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
/* can1 clock - Only for sam9x35 */
|
|
static struct clk can1_clk = {
|
|
.name = "can1_clk",
|
|
.pmc_mask = 1 << AT91SAM9X5_ID_CAN1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
|
|
static struct clk *periph_clocks[] __initdata = {
|
|
&pioAB_clk,
|
|
&pioCD_clk,
|
|
&smd_clk,
|
|
&usart0_clk,
|
|
&usart1_clk,
|
|
&usart2_clk,
|
|
&twi0_clk,
|
|
&twi1_clk,
|
|
&twi2_clk,
|
|
&mmc0_clk,
|
|
&spi0_clk,
|
|
&spi1_clk,
|
|
&uart0_clk,
|
|
&uart1_clk,
|
|
&tcb0_clk,
|
|
&pwm_clk,
|
|
&adc_clk,
|
|
&adc_op_clk,
|
|
&dma0_clk,
|
|
&dma1_clk,
|
|
&uhphs_clk,
|
|
&udphs_clk,
|
|
&mmc1_clk,
|
|
&ssc_clk,
|
|
// irq0
|
|
};
|
|
|
|
static struct clk_lookup periph_clocks_lookups[] = {
|
|
/* lookup table for DT entries */
|
|
CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
|
|
CLKDEV_CON_DEV_ID("usart", "f801c000.serial", &usart0_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "f8020000.serial", &usart1_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "f8024000.serial", &usart2_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "f8028000.serial", &usart3_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "f8040000.serial", &uart0_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "f8044000.serial", &uart1_clk),
|
|
CLKDEV_CON_DEV_ID("t0_clk", "f8008000.timer", &tcb0_clk),
|
|
CLKDEV_CON_DEV_ID("t0_clk", "f800c000.timer", &tcb0_clk),
|
|
CLKDEV_CON_DEV_ID("mci_clk", "f0008000.mmc", &mmc0_clk),
|
|
CLKDEV_CON_DEV_ID("mci_clk", "f000c000.mmc", &mmc1_clk),
|
|
CLKDEV_CON_DEV_ID("dma_clk", "ffffec00.dma-controller", &dma0_clk),
|
|
CLKDEV_CON_DEV_ID("dma_clk", "ffffee00.dma-controller", &dma1_clk),
|
|
CLKDEV_CON_DEV_ID("pclk", "f0010000.ssc", &ssc_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "f8010000.i2c", &twi0_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "f8014000.i2c", &twi1_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "f8018000.i2c", &twi2_clk),
|
|
CLKDEV_CON_DEV_ID("spi_clk", "f0000000.spi", &spi0_clk),
|
|
CLKDEV_CON_DEV_ID("spi_clk", "f0004000.spi", &spi1_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "fffff400.gpio", &pioAB_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "fffff600.gpio", &pioAB_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "fffff800.gpio", &pioCD_clk),
|
|
CLKDEV_CON_DEV_ID(NULL, "fffffa00.gpio", &pioCD_clk),
|
|
/* additional fake clock for macb_hclk */
|
|
CLKDEV_CON_DEV_ID("hclk", "f802c000.ethernet", &macb0_clk),
|
|
CLKDEV_CON_DEV_ID("hclk", "f8030000.ethernet", &macb1_clk),
|
|
CLKDEV_CON_DEV_ID("hclk", "600000.ohci", &uhphs_clk),
|
|
CLKDEV_CON_DEV_ID("ohci_clk", "600000.ohci", &uhphs_clk),
|
|
CLKDEV_CON_DEV_ID("ehci_clk", "700000.ehci", &uhphs_clk),
|
|
CLKDEV_CON_DEV_ID("hclk", "500000.gadget", &utmi_clk),
|
|
CLKDEV_CON_DEV_ID("pclk", "500000.gadget", &udphs_clk),
|
|
};
|
|
|
|
/*
|
|
* The two programmable clocks.
|
|
* You must configure pin multiplexing to bring these signals out.
|
|
*/
|
|
static struct clk pck0 = {
|
|
.name = "pck0",
|
|
.pmc_mask = AT91_PMC_PCK0,
|
|
.type = CLK_TYPE_PROGRAMMABLE,
|
|
.id = 0,
|
|
};
|
|
static struct clk pck1 = {
|
|
.name = "pck1",
|
|
.pmc_mask = AT91_PMC_PCK1,
|
|
.type = CLK_TYPE_PROGRAMMABLE,
|
|
.id = 1,
|
|
};
|
|
|
|
static void __init at91sam9x5_register_clocks(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
|
|
clk_register(periph_clocks[i]);
|
|
|
|
clkdev_add_table(periph_clocks_lookups,
|
|
ARRAY_SIZE(periph_clocks_lookups));
|
|
|
|
if (cpu_is_at91sam9g25()
|
|
|| cpu_is_at91sam9x25())
|
|
clk_register(&usart3_clk);
|
|
|
|
if (cpu_is_at91sam9g25()
|
|
|| cpu_is_at91sam9x25()
|
|
|| cpu_is_at91sam9g35()
|
|
|| cpu_is_at91sam9x35())
|
|
clk_register(&macb0_clk);
|
|
|
|
if (cpu_is_at91sam9g15()
|
|
|| cpu_is_at91sam9g35()
|
|
|| cpu_is_at91sam9x35())
|
|
clk_register(&lcdc_clk);
|
|
|
|
if (cpu_is_at91sam9g25())
|
|
clk_register(&isi_clk);
|
|
|
|
if (cpu_is_at91sam9x25())
|
|
clk_register(&macb1_clk);
|
|
|
|
if (cpu_is_at91sam9x25()
|
|
|| cpu_is_at91sam9x35()) {
|
|
clk_register(&can0_clk);
|
|
clk_register(&can1_clk);
|
|
}
|
|
|
|
clk_register(&pck0);
|
|
clk_register(&pck1);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------
|
|
* AT91SAM9x5 processor initialization
|
|
* -------------------------------------------------------------------- */
|
|
|
|
static void __init at91sam9x5_map_io(void)
|
|
{
|
|
at91_init_sram(0, AT91SAM9X5_SRAM_BASE, AT91SAM9X5_SRAM_SIZE);
|
|
}
|
|
|
|
static void __init at91sam9x5_initialize(void)
|
|
{
|
|
at91_sysirq_mask_rtc(AT91SAM9X5_BASE_RTC);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------
|
|
* Interrupt initialization
|
|
* -------------------------------------------------------------------- */
|
|
|
|
AT91_SOC_START(at91sam9x5)
|
|
.map_io = at91sam9x5_map_io,
|
|
.register_clocks = at91sam9x5_register_clocks,
|
|
.init = at91sam9x5_initialize,
|
|
AT91_SOC_END
|