patch-2.4.22 linux-2.4.22/arch/arm/mach-at91rm9200/core.c

• Lines: 184
• Date: 2003-08-25 04:44:39.000000000 -0700
• Orig file: linux-2.4.21/arch/arm/mach-at91rm9200/core.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/arch/arm/mach-at91rm9200/core.c linux-2.4.22/arch/arm/mach-at91rm9200/core.c
@@ -0,0 +1,183 @@
+/*
+ * linux/arch/arm/mach-at91rm9200/core.c
+ *
+ *  Copyright (c) 2003 SAN People
+ *  Copyright (c) 2003 ATMEL
+ *  Copyright (c) Rick Bronson
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+
+#include <asm/hardware.h>
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <asm/arch/hardware.h>
+
+/*
+ * System peripheral registers mapped at virtual address.
+ */
+AT91PS_SYS AT91_SYS = (AT91PS_SYS) AT91C_VA_BASE_SYS;
+
+static struct map_desc at91rm9200_io_desc[] __initdata = {
+	/* virtual,             physical,          length,   domain,    r, w, c, b */
+	{ AT91C_VA_BASE_SYS,    AT91C_BASE_SYS,    SZ_4K,    DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_SPI,    AT91C_BASE_SPI,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_SSC2,   AT91C_BASE_SSC2,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_SSC1,   AT91C_BASE_SSC1,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_SSC0,   AT91C_BASE_SSC0,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_US3,    AT91C_BASE_US3,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_US2,    AT91C_BASE_US2,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_US1,    AT91C_BASE_US1,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_US0,    AT91C_BASE_US0,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_EMAC,   AT91C_BASE_EMAC,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_TWI,    AT91C_BASE_TWI,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_MCI,    AT91C_BASE_MCI,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_UDP,    AT91C_BASE_UDP,    SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_TCB1,   AT91C_BASE_TCB1,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	{ AT91C_VA_BASE_TCB0,   AT91C_BASE_TCB0,   SZ_16K,   DOMAIN_IO, 0, 1, 0, 0},
+	LAST_DESC
+};
+
+/* Interrupt configuration */
+static AT91_REG at91rm9200_irq_smr[] __initdata = {
+	(AT91_SMR_FIQ),		/* FIQ */
+	(AT91_SMR_SYS),		/* System Peripherals */
+	(AT91_SMR_PIOA),	/* PIO A */
+	(AT91_SMR_PIOB),	/* PIO B */
+	(AT91_SMR_PIOC),	/* PIO C */
+	(AT91_SMR_PIOD),	/* PIO D */
+	(AT91_SMR_US0),		/* USART 0 */
+	(AT91_SMR_US1),		/* USART 1 */
+	(AT91_SMR_US2),		/* USART 2 */
+	(AT91_SMR_US3),		/* USART 3 */
+	(AT91_SMR_MCI),		/* Multimedia Card */
+	(AT91_SMR_UDP),		/* USB Device */
+	(AT91_SMR_TWI),		/* Two-wire interface */
+	(AT91_SMR_SPI),		/* SPI */
+	(AT91_SMR_SSC0),	/* Sync Serial 0 */
+	(AT91_SMR_SSC1),	/* Sync Serial 1 */
+	(AT91_SMR_SSC2),	/* Sync Serial 2 */
+	(AT91_SMR_TC0),		/* TC 0 */
+	(AT91_SMR_TC1),		/* TC 1 */
+	(AT91_SMR_TC2),		/* TC 2 */
+	(AT91_SMR_TC3),		/* TC 3 */
+	(AT91_SMR_TC4),		/* TC 4 */
+	(AT91_SMR_TC5),		/* TC 5 */
+	(AT91_SMR_UHP),		/* USB Host */
+	(AT91_SMR_EMAC),	/* Ethernet */
+	(AT91_SMR_IRQ0),	/* IRQ 0 */
+	(AT91_SMR_IRQ1),	/* IRQ 1 */
+	(AT91_SMR_IRQ2),	/* IRQ 2 */
+	(AT91_SMR_IRQ3),	/* IRQ 3 */
+	(AT91_SMR_IRQ4),	/* IRQ 4 */
+	(AT91_SMR_IRQ5),	/* IRQ 5 */
+	(AT91_SMR_IRQ6)		/* IRQ 6 */
+};
+
+/* Architecture-specific fixups */
+static void __init at91rm9200_fixup(struct machine_desc *desc, struct param_struct *unused,
+		 char **cmdline, struct meminfo *mi)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+	ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+	setup_ramdisk(1, 0, 0, CONFIG_BLK_DEV_RAM_SIZE);
+//	setup_initrd(0xc0100000, 3*1024*1024);
+#endif
+}
+
+extern void at91_register_uart(int idx, int port);
+
+void __init at91rm9200_map_io(void)
+{
+	int serial[AT91C_NR_UART] = AT91C_UART_MAP;
+	int i;
+
+	iotable_init(at91rm9200_io_desc);
+
+	/* Register UARTs */
+	for (i = 0; i < AT91C_NR_UART; i++) {
+		if (serial[i] >= 0)
+			at91_register_uart(i, serial[i]);
+	}
+}
+
+static void at91rm9200_mask_irq(unsigned int irq)
+{
+	/* Disable interrupt on AIC */
+	AT91_SYS->AIC_IDCR =  1 << irq;
+}
+
+static void at91rm9200_unmask_irq(unsigned int irq)
+{
+	/* Enable interrupt on AIC */
+	AT91_SYS->AIC_IECR =  1 << irq;
+}
+
+void __init at91rm9200_init_irq(void)
+{
+	unsigned int i;
+
+	/*
+	 * The IVR is used by macro get_irqnr_and_base to read and verify.
+	 * The irq number is NR_IRQS when a spurious interrupt has occured.
+	 */
+	for (i = 0; i < NR_IRQS; i++) {
+		/* Put irq number in Source Vector Register: */
+		AT91_SYS->AIC_SVR[i] = i;
+		/* Store the Source Mode Register as defined in table above */
+		AT91_SYS->AIC_SMR[i] = at91rm9200_irq_smr[i];
+
+		irq_desc[i].valid	= 1;
+		irq_desc[i].mask_ack	= at91rm9200_mask_irq;
+		irq_desc[i].mask	= at91rm9200_mask_irq;
+		irq_desc[i].unmask	= at91rm9200_unmask_irq;
+
+		/* Perform 8 End Of Interrupt Command to make sure AIC will not Lock out nIRQ */
+		if (i < 8)
+			AT91_SYS->AIC_EOICR = AT91_SYS->AIC_EOICR;
+	}
+
+	/* Spurious Interrupt ID in Spurious Vector Register is NR_IRQS
+	 * When there is no current interrupt, the IRQ Vector Register reads the value stored in AIC_SPU
+	 */
+	AT91_SYS->AIC_SPU = NR_IRQS;
+
+	/* No debugging in AIC: Debug (Protect) Control Register */
+	AT91_SYS->AIC_DCR = 0;
+
+	/* Disable and clear all interrupts initially */
+	AT91_SYS->AIC_IDCR = 0xFFFFFFFF;
+	AT91_SYS->AIC_ICCR = 0xFFFFFFFF;
+}
+
+MACHINE_START(AT91RM9200, "ATMEL AT91RM9200")
+	MAINTAINER("SAN People / ATMEL")
+	BOOT_MEM(AT91_SDRAM_BASE, AT91C_BASE_SYS, AT91C_VA_BASE_SYS)
+	BOOT_PARAMS(AT91_SDRAM_BASE + 0x100)
+	FIXUP(at91rm9200_fixup)
+	MAPIO(at91rm9200_map_io)
+	INITIRQ(at91rm9200_init_irq)
+MACHINE_END