freebsd-nq/sys/arm/at91/at91sam9x25.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/at91sam9x25reg.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>

struct at91sam9x25_softc {
	device_t dev;
	bus_space_tag_t sc_st;
	bus_space_handle_t sc_sh;
	bus_space_handle_t sc_sys_sh;
	bus_space_handle_t sc_aic_sh;
};

/*
 * 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) */
};

#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_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_cpu_add_builtin_children(device_t dev)
{
	int i;
	const struct cpu_devs *walker;

	for (i = 1, walker = at91_devs; walker->name; i++, walker++) {
		at91_add_child(dev, i, walker->name, walker->unit,
		    walker->mem_base, walker->mem_len, walker->irq0,
		    walker->irq1, walker->irq2);
	}
}

static uint32_t
at91_pll_outa(int freq)
{

	switch (freq / 10000000) {
		case 747 ... 801: return ((1 << 29) | (0 << 14));
		case 697 ... 746: return ((1 << 29) | (1 << 14));
		case 647 ... 696: return ((1 << 29) | (2 << 14));
		case 597 ... 646: return ((1 << 29) | (3 << 14));
		case 547 ... 596: return ((1 << 29) | (1 << 14));
		case 497 ... 546: return ((1 << 29) | (2 << 14));
		case 447 ... 496: return ((1 << 29) | (3 << 14));
		case 397 ... 446: return ((1 << 29) | (4 << 14));
		default: return (1 << 29);
	}
}

static uint32_t
at91_pll_outb(int freq)
{

	return (0);
}

static void
at91_identify(driver_t *drv, device_t parent)
{

	if (soc_info.type == AT91_T_SAM9X5 && soc_info.subtype == AT91_ST_SAM9X25) {
		at91_add_child(parent, 0, "at91sam9x25", 0, 0, 0, -1, 0, 0);
		at91_cpu_add_builtin_children(parent);
	}
}

static int
at91_probe(device_t dev)
{

	device_set_desc(dev, "AT91SAM9X25");
	return (0);
}

static int
at91_attach(device_t dev)
{
	struct at91_pmc_clock *clk;
	struct at91sam9x25_softc *sc = device_get_softc(dev);
	int i;

	struct at91_softc *at91sc = device_get_softc(device_get_parent(dev));

	sc->sc_st = at91sc->sc_st;
	sc->sc_sh = at91sc->sc_sh;
	sc->dev = dev;

	/* 
	 * XXX These values work for the RM9200, SAM926[01], and SAM9X25
	 * will have to fix this when we want to support anything else. XXX
	 */
	if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91SAM9X25_SYS_BASE,
	    AT91SAM9X25_SYS_SIZE, &sc->sc_sys_sh) != 0)
		panic("Enable to map system registers");

	if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91SAM9X25_AIC_BASE,
	    AT91SAM9X25_AIC_SIZE, &sc->sc_aic_sh) != 0)
		panic("Enable to map system registers");

	/* XXX Hack to tell atmelarm about the AIC */
	at91sc->sc_aic_sh = sc->sc_aic_sh;

	for (i = 0; i < 32; i++) {
		bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SVR + 
		    i * 4, i);
		/* Priority. */
		bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SMR + i * 4,
		    at91_irq_prio[i]);
		if (i < 8)
			bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_EOICR,
			    1);
	}

	bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_SPU, 32);
	/* No debug. */
	bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_DCR, 0);
	/* Disable and clear all interrupts. */
	bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_IDCR, 0xffffffff);
	bus_space_write_4(sc->sc_st, sc->sc_aic_sh, IC_ICCR, 0xffffffff);

	/* 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_pll_outa;
	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_pll_outb;
	at91_pmc_clock_deref(clk);
	return (0);
}

static device_method_t at91sam9x25_methods[] = {
	DEVMETHOD(device_probe, at91_probe),
	DEVMETHOD(device_attach, at91_attach),
	DEVMETHOD(device_identify, at91_identify),
	{0, 0},
};

static driver_t at91sam9x25_driver = {
	"at91sam9x25",
	at91sam9x25_methods,
	sizeof(struct at91sam9x25_softc),
};

static devclass_t at91sam9x25_devclass;

DRIVER_MODULE(at91sam9x25, atmelarm, at91sam9x25_driver, at91sam9x25_devclass, 0, 0);

static struct at91_soc_data soc_data = {
	.soc_delay = at91_pit_delay,
	.soc_reset = at91_rst_cpu_reset
};

AT91_SOC_SUB(AT91_T_SAM9X5, AT91_ST_SAM9X25, &soc_data);