FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/at91sam9x5.c

     /*-
      * Copyright (c) 2005 Olivier Houchard.  All rights reserved.
      * Copyright (c) 2010 Greg Ansley.  All rights reserved.
      * Copyright (c) 2012 M. Warner Losh..  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    
    #include <machine/bus.h>
    
    #include <arm/at91/at91var.h>
    #include <arm/at91/at91reg.h>
    #include <arm/at91/at91soc.h>
    #include <arm/at91/at91_aicreg.h>
    #include <arm/at91/at91sam9x5reg.h>
    #include <arm/at91/at91_pitreg.h>
    #include <arm/at91/at91_pmcreg.h>
    #include <arm/at91/at91_pmcvar.h>
    #include <arm/at91/at91_rstreg.h>
    
    /*
     * Standard priority levels for the system.  0 is lowest and 7 is highest.
     * These values are the ones Atmel uses for its Linux port
     */
    static const int at91_irq_prio[32] =
    {
            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) */
    };
    
    static const uint32_t at91_pio_base[] = {
            AT91SAM9X25_PIOA_BASE,
            AT91SAM9X25_PIOB_BASE,
            AT91SAM9X25_PIOC_BASE,
            AT91SAM9X25_PIOD_BASE,
    };
    
    #define DEVICE(_name, _id, _unit)               \
            {                                       \
                    _name, _unit,                   \
                   AT91SAM9X25_ ## _id ##_BASE,    \
                   AT91SAM9X25_ ## _id ## _SIZE,   \
                   AT91SAM9X25_IRQ_ ## _id         \
           }
   
   static const struct cpu_devs at91_devs[] =
   {
           DEVICE("at91_aic", AIC,  0),
           DEVICE("at91_pmc", PMC,  0),
           DEVICE("at91_wdt", WDT,  0),
           DEVICE("at91_rst", RSTC, 0),
           DEVICE("at91_pit", PIT,  0),
           DEVICE("at91_pio", PIOA, 0),
           DEVICE("at91_pio", PIOB, 1),
           DEVICE("at91_pio", PIOC, 2),
           DEVICE("at91_pio", PIOD, 3),
           DEVICE("at91_twi", TWI0, 0),
           DEVICE("at91_twi", TWI1, 1),
           DEVICE("at91_twi", TWI2, 2),
           DEVICE("at91_mci", HSMCI0, 0),
           DEVICE("at91_mci", HSMCI1, 1),
           DEVICE("uart", DBGU,   0),
           DEVICE("uart", USART0, 1),
           DEVICE("uart", USART1, 2),
           DEVICE("uart", USART2, 3),
           DEVICE("uart", USART3, 4),
           DEVICE("spi",  SPI0,   0),
           DEVICE("spi",  SPI1,   1),
           DEVICE("macb", EMAC0,  0),
           DEVICE("macb", EMAC1,  0),
           DEVICE("nand", NAND,   0),
           DEVICE("ohci", OHCI,   0),
           DEVICE("ehci", EHCI,   0),
           { 0, 0, 0, 0, 0 }
   };
   
   static void
   at91_clock_init(void)
   {
           struct at91_pmc_clock *clk;
   
           /* Update USB device port clock info */
           clk = at91_pmc_clock_ref("udpck");
           clk->pmc_mask  = PMC_SCER_UDP_SAM9;
           at91_pmc_clock_deref(clk);
   
           /* Update USB host port clock info */
           clk = at91_pmc_clock_ref("uhpck");
           clk->pmc_mask  = PMC_SCER_UHP_SAM9;
           at91_pmc_clock_deref(clk);
   
           /* Each SOC has different PLL contraints */
           clk = at91_pmc_clock_ref("plla");
           clk->pll_min_in    = SAM9X25_PLL_A_MIN_IN_FREQ;         /*   2 MHz */
           clk->pll_max_in    = SAM9X25_PLL_A_MAX_IN_FREQ;         /*  32 MHz */
           clk->pll_min_out   = SAM9X25_PLL_A_MIN_OUT_FREQ;        /* 400 MHz */
           clk->pll_max_out   = SAM9X25_PLL_A_MAX_OUT_FREQ;        /* 800 MHz */
           clk->pll_mul_shift = SAM9X25_PLL_A_MUL_SHIFT;
           clk->pll_mul_mask  = SAM9X25_PLL_A_MUL_MASK;
           clk->pll_div_shift = SAM9X25_PLL_A_DIV_SHIFT;
           clk->pll_div_mask  = SAM9X25_PLL_A_DIV_MASK;
           clk->set_outb      = at91_pmc_800mhz_plla_outb;
           at91_pmc_clock_deref(clk);
   
           clk = at91_pmc_clock_ref("pllb");
           clk->pll_min_in    = SAM9X25_PLL_B_MIN_IN_FREQ;         /*   2 MHz */
           clk->pll_max_in    = SAM9X25_PLL_B_MAX_IN_FREQ;         /*  32 MHz */
           clk->pll_min_out   = SAM9X25_PLL_B_MIN_OUT_FREQ;        /*  30 MHz */
           clk->pll_max_out   = SAM9X25_PLL_B_MAX_OUT_FREQ;        /* 100 MHz */
           clk->pll_mul_shift = SAM9X25_PLL_B_MUL_SHIFT;
           clk->pll_mul_mask  = SAM9X25_PLL_B_MUL_MASK;
           clk->pll_div_shift = SAM9X25_PLL_B_DIV_SHIFT;
           clk->pll_div_mask  = SAM9X25_PLL_B_DIV_MASK;
           clk->set_outb      = at91_pmc_800mhz_pllb_outb;
           at91_pmc_clock_deref(clk);
   }
   
   static struct at91_soc_data soc_data = {
           .soc_delay = at91_pit_delay,
           .soc_reset = at91_rst_cpu_reset,
           .soc_clock_init = at91_clock_init,
           .soc_irq_prio = at91_irq_prio,
           .soc_children = at91_devs,
           .soc_pio_base = at91_pio_base,
           .soc_pio_count = nitems(at91_pio_base),
   };
   
   AT91_SOC_SUB(AT91_T_SAM9X5, AT91_ST_SAM9X25, &soc_data);

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