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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [arm/] [mach-at91/] [at91sam9261.c] - Rev 3
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/* * arch/arm/mach-at91/at91sam9261.c * * Copyright (C) 2005 SAN People * * 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 <asm/mach/arch.h> #include <asm/mach/map.h> #include <asm/arch/at91sam9261.h> #include <asm/arch/at91_pmc.h> #include <asm/arch/at91_rstc.h> #include "generic.h" #include "clock.h" static struct map_desc at91sam9261_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 - AT91SAM9261_SRAM_SIZE, .pfn = __phys_to_pfn(AT91SAM9261_SRAM_BASE), .length = AT91SAM9261_SRAM_SIZE, .type = MT_DEVICE, }, }; /* -------------------------------------------------------------------- * Clocks * -------------------------------------------------------------------- */ /* * The peripheral clocks. */ static struct clk pioA_clk = { .name = "pioA_clk", .pmc_mask = 1 << AT91SAM9261_ID_PIOA, .type = CLK_TYPE_PERIPHERAL, }; static struct clk pioB_clk = { .name = "pioB_clk", .pmc_mask = 1 << AT91SAM9261_ID_PIOB, .type = CLK_TYPE_PERIPHERAL, }; static struct clk pioC_clk = { .name = "pioC_clk", .pmc_mask = 1 << AT91SAM9261_ID_PIOC, .type = CLK_TYPE_PERIPHERAL, }; static struct clk usart0_clk = { .name = "usart0_clk", .pmc_mask = 1 << AT91SAM9261_ID_US0, .type = CLK_TYPE_PERIPHERAL, }; static struct clk usart1_clk = { .name = "usart1_clk", .pmc_mask = 1 << AT91SAM9261_ID_US1, .type = CLK_TYPE_PERIPHERAL, }; static struct clk usart2_clk = { .name = "usart2_clk", .pmc_mask = 1 << AT91SAM9261_ID_US2, .type = CLK_TYPE_PERIPHERAL, }; static struct clk mmc_clk = { .name = "mci_clk", .pmc_mask = 1 << AT91SAM9261_ID_MCI, .type = CLK_TYPE_PERIPHERAL, }; static struct clk udc_clk = { .name = "udc_clk", .pmc_mask = 1 << AT91SAM9261_ID_UDP, .type = CLK_TYPE_PERIPHERAL, }; static struct clk twi_clk = { .name = "twi_clk", .pmc_mask = 1 << AT91SAM9261_ID_TWI, .type = CLK_TYPE_PERIPHERAL, }; static struct clk spi0_clk = { .name = "spi0_clk", .pmc_mask = 1 << AT91SAM9261_ID_SPI0, .type = CLK_TYPE_PERIPHERAL, }; static struct clk spi1_clk = { .name = "spi1_clk", .pmc_mask = 1 << AT91SAM9261_ID_SPI1, .type = CLK_TYPE_PERIPHERAL, }; static struct clk ssc0_clk = { .name = "ssc0_clk", .pmc_mask = 1 << AT91SAM9261_ID_SSC0, .type = CLK_TYPE_PERIPHERAL, }; static struct clk ssc1_clk = { .name = "ssc1_clk", .pmc_mask = 1 << AT91SAM9261_ID_SSC1, .type = CLK_TYPE_PERIPHERAL, }; static struct clk ssc2_clk = { .name = "ssc2_clk", .pmc_mask = 1 << AT91SAM9261_ID_SSC2, .type = CLK_TYPE_PERIPHERAL, }; static struct clk tc0_clk = { .name = "tc0_clk", .pmc_mask = 1 << AT91SAM9261_ID_TC0, .type = CLK_TYPE_PERIPHERAL, }; static struct clk tc1_clk = { .name = "tc1_clk", .pmc_mask = 1 << AT91SAM9261_ID_TC1, .type = CLK_TYPE_PERIPHERAL, }; static struct clk tc2_clk = { .name = "tc2_clk", .pmc_mask = 1 << AT91SAM9261_ID_TC2, .type = CLK_TYPE_PERIPHERAL, }; static struct clk ohci_clk = { .name = "ohci_clk", .pmc_mask = 1 << AT91SAM9261_ID_UHP, .type = CLK_TYPE_PERIPHERAL, }; static struct clk lcdc_clk = { .name = "lcdc_clk", .pmc_mask = 1 << AT91SAM9261_ID_LCDC, .type = CLK_TYPE_PERIPHERAL, }; static struct clk *periph_clocks[] __initdata = { &pioA_clk, &pioB_clk, &pioC_clk, &usart0_clk, &usart1_clk, &usart2_clk, &mmc_clk, &udc_clk, &twi_clk, &spi0_clk, &spi1_clk, &ssc0_clk, &ssc1_clk, &ssc2_clk, &tc0_clk, &tc1_clk, &tc2_clk, &ohci_clk, &lcdc_clk, // irq0 .. irq2 }; /* * The four 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 struct clk pck2 = { .name = "pck2", .pmc_mask = AT91_PMC_PCK2, .type = CLK_TYPE_PROGRAMMABLE, .id = 2, }; static struct clk pck3 = { .name = "pck3", .pmc_mask = AT91_PMC_PCK3, .type = CLK_TYPE_PROGRAMMABLE, .id = 3, }; /* HClocks */ static struct clk hck0 = { .name = "hck0", .pmc_mask = AT91_PMC_HCK0, .type = CLK_TYPE_SYSTEM, .id = 0, }; static struct clk hck1 = { .name = "hck1", .pmc_mask = AT91_PMC_HCK1, .type = CLK_TYPE_SYSTEM, .id = 1, }; static void __init at91sam9261_register_clocks(void) { int i; for (i = 0; i < ARRAY_SIZE(periph_clocks); i++) clk_register(periph_clocks[i]); clk_register(&pck0); clk_register(&pck1); clk_register(&pck2); clk_register(&pck3); clk_register(&hck0); clk_register(&hck1); } /* -------------------------------------------------------------------- * GPIO * -------------------------------------------------------------------- */ static struct at91_gpio_bank at91sam9261_gpio[] = { { .id = AT91SAM9261_ID_PIOA, .offset = AT91_PIOA, .clock = &pioA_clk, }, { .id = AT91SAM9261_ID_PIOB, .offset = AT91_PIOB, .clock = &pioB_clk, }, { .id = AT91SAM9261_ID_PIOC, .offset = AT91_PIOC, .clock = &pioC_clk, } }; static void at91sam9261_reset(void) { at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST); } /* -------------------------------------------------------------------- * AT91SAM9261 processor initialization * -------------------------------------------------------------------- */ void __init at91sam9261_initialize(unsigned long main_clock) { /* Map peripherals */ iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc)); at91_arch_reset = at91sam9261_reset; at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1) | (1 << AT91SAM9261_ID_IRQ2); /* Init clock subsystem */ at91_clock_init(main_clock); /* Register the processor-specific clocks */ at91sam9261_register_clocks(); /* Register GPIO subsystem */ at91_gpio_init(at91sam9261_gpio, 3); } /* -------------------------------------------------------------------- * Interrupt initialization * -------------------------------------------------------------------- */ /* * The default interrupt priority levels (0 = lowest, 7 = highest). */ static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = { 7, /* Advanced Interrupt Controller */ 7, /* System Peripherals */ 0, /* Parallel IO Controller A */ 0, /* Parallel IO Controller B */ 0, /* Parallel IO Controller C */ 0, 6, /* USART 0 */ 6, /* USART 1 */ 6, /* USART 2 */ 0, /* Multimedia Card Interface */ 4, /* USB Device Port */ 0, /* Two-Wire Interface */ 6, /* Serial Peripheral Interface 0 */ 6, /* Serial Peripheral Interface 1 */ 5, /* Serial Synchronous Controller 0 */ 5, /* Serial Synchronous Controller 1 */ 5, /* Serial Synchronous Controller 2 */ 0, /* Timer Counter 0 */ 0, /* Timer Counter 1 */ 0, /* Timer Counter 2 */ 3, /* USB Host port */ 3, /* LCD Controller */ 0, 0, 0, 0, 0, 0, 0, 0, /* Advanced Interrupt Controller */ 0, /* Advanced Interrupt Controller */ 0, /* Advanced Interrupt Controller */ }; void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS]) { if (!priority) priority = at91sam9261_default_irq_priority; /* Initialize the AIC interrupt controller */ at91_aic_init(priority); /* Enable GPIO interrupts */ at91_gpio_irq_setup(); }