[PATCH 4/6] AT91: AT91SAM9x5 processors support

Jean-Christophe PLAGNIOL-VILLARD plagnioj at jcrosoft.com
Thu Mar 10 13:08:55 EST 2011


From: Dan Liang <dan.liang at atmel.com>

Add 5series chips family support in at91sam9x5.c:
- Define clock resources for 5series and some initialization code

Signed-off-by: Dan Liang <dan.liang at atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre at atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
 arch/arm/mach-at91/at91sam9x5.c |  416 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 416 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-at91/at91sam9x5.c

diff --git a/arch/arm/mach-at91/at91sam9x5.c b/arch/arm/mach-at91/at91sam9x5.c
new file mode 100644
index 0000000..c7f2a81
--- /dev/null
+++ b/arch/arm/mach-at91/at91sam9x5.c
@@ -0,0 +1,416 @@
+/*
+ *  Chip-specific setup code for the AT91SAM9x5 family
+ *
+ *  Copyright (C) 2010 Atmel Corporation.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/pm.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/at91_rstc.h>
+#include <mach/at91_shdwc.h>
+#include <mach/cpu.h>
+
+#include "generic.h"
+#include "clock.h"
+
+static struct map_desc at91sam9x5_io_desc[] __initdata = {
+	{
+		.virtual	= AT91_VA_BASE_SYS,
+		.pfn		= __phys_to_pfn(AT91_BASE_SYS),
+		.length		= SZ_16K,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= AT91_IO_VIRT_BASE - AT91SAM9X5_SRAM_SIZE,
+		.pfn		= __phys_to_pfn(AT91SAM9X5_SRAM_BASE),
+		.length		= AT91SAM9X5_SRAM_SIZE,
+		.type		= MT_DEVICE,
+	}
+};
+
+/* --------------------------------------------------------------------
+ *  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 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_clk",
+	.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		= "macb0_clk",
+	.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		= "macb1_clk",
+	.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,
+};
+
+/* One additional fake clock for ohci */
+static struct clk ohci_clk = {
+	.name		= "ohci_clk",
+	.pmc_mask	= 0,
+	.type		= CLK_TYPE_PERIPHERAL,
+	.parent		= &uhphs_clk,
+};
+
+/* One additional fake clock for second TC block */
+static struct clk tcb1_clk = {
+	.name		= "tcb1_clk",
+	.pmc_mask	= 0,
+	.type		= CLK_TYPE_PERIPHERAL,
+	.parent		= &tcb0_clk,
+};
+
+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,
+	&dma0_clk,
+	&dma1_clk,
+	&uhphs_clk,
+	&udphs_clk,
+	&mmc1_clk,
+	&ssc_clk,
+	// irq0
+	&ohci_clk,
+	&tcb1_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]);
+
+	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_at91sam9x35()) {
+		clk_register(&can0_clk);
+		clk_register(&can1_clk);
+	}
+
+	clk_register(&pck0);
+	clk_register(&pck1);
+}
+
+/* --------------------------------------------------------------------
+ *  GPIO
+ * -------------------------------------------------------------------- */
+
+static struct at91_gpio_bank at91sam9x5_gpio[] = {
+	{
+		.id		= AT91SAM9X5_ID_PIOAB,
+		.offset		= AT91_PIOA,
+		.clock		= &pioAB_clk,
+	}, {
+		.id		= AT91SAM9X5_ID_PIOAB,
+		.offset		= AT91_PIOB,
+		.clock		= &pioAB_clk,
+	}, {
+		.id		= AT91SAM9X5_ID_PIOCD,
+		.offset		= AT91_PIOC,
+		.clock		= &pioCD_clk,
+	}, {
+		.id		= AT91SAM9X5_ID_PIOCD,
+		.offset		= AT91_PIOD,
+		.clock		= &pioCD_clk,
+	}
+};
+
+static void at91sam9x5_reset(void)
+{
+	at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
+}
+
+static void at91sam9x5_poweroff(void)
+{
+	at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
+}
+
+
+/* --------------------------------------------------------------------
+ *  AT91SAM9x5 processor initialization
+ * -------------------------------------------------------------------- */
+
+void __init at91sam9x5_initialize(unsigned long main_clock)
+{
+	/* Map peripherals */
+	iotable_init(at91sam9x5_io_desc, ARRAY_SIZE(at91sam9x5_io_desc));
+
+	at91_arch_reset = at91sam9x5_reset;
+	pm_power_off = at91sam9x5_poweroff;
+	at91_extern_irq = (1 << AT91SAM9X5_ID_IRQ0);
+
+	/* Init clock subsystem */
+	at91_clock_init(main_clock);
+
+	/* Register the processor-specific clocks */
+	at91sam9x5_register_clocks();
+
+	/* Register GPIO subsystem */
+	at91_gpio_init(at91sam9x5_gpio, 4);
+}
+
+/* --------------------------------------------------------------------
+ *  Interrupt initialization
+ * -------------------------------------------------------------------- */
+
+/*
+ * The default interrupt priority levels (0 = lowest, 7 = highest).
+ */
+static unsigned int at91sam9x5_default_irq_priority[NR_AIC_IRQS] __initdata = {
+	7,	/* Advanced Interrupt Controller (FIQ) */
+	7,	/* System Peripherals */
+	1,	/* Parallel IO Controller A and B */
+	1,	/* Parallel IO Controller C and D */
+	4,	/* Soft Modem */
+	5,	/* USART 0 */
+	5,	/* USART 1 */
+	5,	/* USART 2 */
+	5,	/* USART 3 */
+	6,	/* Two-Wire Interface 0 */
+	6,	/* Two-Wire Interface 1 */
+	6,	/* Two-Wire Interface 2 */
+	0,	/* Multimedia Card Interface 0 */
+	5,	/* Serial Peripheral Interface 0 */
+	5,	/* Serial Peripheral Interface 1 */
+	5,	/* UART 0 */
+	5,	/* UART 1 */
+	0,	/* Timer Counter 0, 1, 2, 3, 4 and 5 */
+	0,	/* Pulse Width Modulation Controller */
+	0,	/* ADC Controller */
+	0,	/* DMA Controller 0 */
+	0,	/* DMA Controller 1 */
+	2,	/* USB Host High Speed port */
+	2,	/* USB Device High speed port */
+	3,	/* Ethernet MAC 0 */
+	3,	/* LDC Controller or Image Sensor Interface */
+	0,	/* Multimedia Card Interface 1 */
+	3,	/* Ethernet MAC 1 */
+	4,	/* Synchronous Serial Interface */
+	4,	/* CAN Controller 0 */
+	4,	/* CAN Controller 1 */
+	0,	/* Advanced Interrupt Controller (IRQ0) */
+};
+
+void __init at91sam9x5_init_interrupts(unsigned int priority[NR_AIC_IRQS])
+{
+	if (!priority)
+		priority = at91sam9x5_default_irq_priority;
+
+	/* Initialize the AIC interrupt controller */
+	at91_aic_init(priority);
+
+	/* Enable GPIO interrupts */
+	at91_gpio_irq_setup();
+}
-- 
1.7.4.1




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