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| Current File : //compat/linux/proc/self/root/sys/arm/at91/at91sam9260.c |
/*-
* Copyright (c) 2005 Olivier Houchard. All rights reserved.
* Copyright (c) 2010 Greg Ansley. 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: release/9.1.0/sys/arm/at91/at91sam9260.c 236081 2012-05-26 09:05:45Z marius $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <arm/at91/at91var.h>
#include <arm/at91/at91_aicreg.h>
#include <arm/at91/at91sam9260reg.h>
#include <arm/at91/at91_pmcreg.h>
#include <arm/at91/at91_pmcvar.h>
struct at91sam9_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;
bus_space_handle_t sc_dbg_sh;
bus_space_handle_t sc_matrix_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 */
7, /* System Peripherals */
1, /* Parallel IO Controller A */
1, /* Parallel IO Controller B */
1, /* Parallel IO Controller C */
0, /* Analog-to-Digital Converter */
5, /* USART 0 */
5, /* USART 1 */
5, /* USART 2 */
0, /* Multimedia Card Interface */
2, /* USB Device Port */
6, /* Two-Wire Interface */
5, /* Serial Peripheral Interface 0 */
5, /* Serial Peripheral Interface 1 */
5, /* Serial Synchronous Controller */
0, /* (reserved) */
0, /* (reserved) */
0, /* Timer Counter 0 */
0, /* Timer Counter 1 */
0, /* Timer Counter 2 */
2, /* USB Host port */
3, /* Ethernet */
0, /* Image Sensor Interface */
5, /* USART 3 */
5, /* USART 4 */
5, /* USART 5 */
0, /* Timer Counter 3 */
0, /* Timer Counter 4 */
0, /* Timer Counter 5 */
0, /* Advanced Interrupt Controller IRQ0 */
0, /* Advanced Interrupt Controller IRQ1 */
0, /* Advanced Interrupt Controller IRQ2 */
};
#define DEVICE(_name, _id, _unit) \
{ \
_name, _unit, \
AT91SAM9260_ ## _id ##_BASE, \
AT91SAM9260_ ## _id ## _SIZE, \
AT91SAM9260_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_twi", TWI, 0),
DEVICE("at91_mci", MCI, 0),
DEVICE("uart", DBGU, 0),
DEVICE("uart", USART0, 1),
DEVICE("uart", USART1, 2),
DEVICE("uart", USART2, 3),
DEVICE("uart", USART3, 4),
DEVICE("uart", USART4, 5),
DEVICE("uart", USART5, 6),
DEVICE("spi", SPI0, 0),
DEVICE("spi", SPI1, 1),
DEVICE("ate", EMAC, 0),
DEVICE("macb", EMAC, 0),
DEVICE("nand", NAND, 0),
DEVICE("ohci", OHCI, 0),
{ 0, 0, 0, 0, 0 }
};
static void
at91_add_child(device_t dev, int prio, const char *name, int unit,
bus_addr_t addr, bus_size_t size, int irq0, int irq1, int irq2)
{
device_t kid;
struct at91_ivar *ivar;
kid = device_add_child_ordered(dev, prio, name, unit);
if (kid == NULL) {
printf("Can't add child %s%d ordered\n", name, unit);
return;
}
ivar = malloc(sizeof(*ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
if (ivar == NULL) {
device_delete_child(dev, kid);
printf("Can't add alloc ivar\n");
return;
}
device_set_ivars(kid, ivar);
resource_list_init(&ivar->resources);
if (irq0 != -1) {
bus_set_resource(kid, SYS_RES_IRQ, 0, irq0, 1);
if (irq0 != AT91SAM9260_IRQ_SYSTEM)
at91_pmc_clock_add(device_get_nameunit(kid), irq0, 0);
}
if (irq1 != 0)
bus_set_resource(kid, SYS_RES_IRQ, 1, irq1, 1);
if (irq2 != 0)
bus_set_resource(kid, SYS_RES_IRQ, 2, irq2, 1);
if (addr != 0 && addr < AT91SAM9260_BASE)
addr += AT91SAM9260_BASE;
if (addr != 0)
bus_set_resource(kid, SYS_RES_MEMORY, 0, addr, size);
}
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)
{
if (freq > 195000000)
return (0x20000000);
else
return (0x20008000);
}
static uint32_t
at91_pll_outb(int freq)
{
return (0x4000);
}
static void
at91_identify(driver_t *drv, device_t parent)
{
switch (AT91_CPU(at91_chip_id)) {
case AT91_CPU_SAM9260:
case AT91_CPU_SAM9XE128:
case AT91_CPU_SAM9XE256:
case AT91_CPU_SAM9XE512:
at91_add_child(parent, 0, "at91sam9260", 0, 0, 0, -1, 0, 0);
at91_cpu_add_builtin_children(parent);
break;
}
}
static int
at91_probe(device_t dev)
{
const char *desc;
switch (AT91_CPU(at91_chip_id)) {
case AT91_CPU_SAM9260:
desc = "AT91SAM9260";
break;
case AT91_CPU_SAM9XE128:
desc = "AT91SAM9XE128";
break;
case AT91_CPU_SAM9XE256:
desc = "AT91SAM9XE256";
break;
case AT91_CPU_SAM9XE512:
desc = "AT91SAM9XE512";
break;
default:
return (ENXIO);
}
device_set_desc(dev, desc);
return (0);
}
static int
at91_attach(device_t dev)
{
struct at91_pmc_clock *clk;
struct at91sam9_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;
if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91SAM9260_SYS_BASE,
AT91SAM9260_SYS_SIZE, &sc->sc_sys_sh) != 0)
panic("Enable to map system registers");
if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91SAM9260_DBGU_BASE,
AT91SAM9260_DBGU_SIZE, &sc->sc_dbg_sh) != 0)
panic("Enable to map DBGU registers");
if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91SAM9260_AIC_BASE,
AT91SAM9260_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;
at91sc->sc_irq_system = AT91SAM9260_IRQ_SYSTEM;
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);
/* Disable all interrupts for DBGU */
bus_space_write_4(sc->sc_st, sc->sc_dbg_sh, 0x0c, 0xffffffff);
if (bus_space_subregion(sc->sc_st, sc->sc_sh,
AT91SAM9260_MATRIX_BASE, AT91SAM9260_MATRIX_SIZE,
&sc->sc_matrix_sh) != 0)
panic("Enable to map matrix registers");
/* activate NAND*/
i = bus_space_read_4(sc->sc_st, sc->sc_matrix_sh,
AT91SAM9260_EBICSA);
bus_space_write_4(sc->sc_st, sc->sc_matrix_sh,
AT91SAM9260_EBICSA,
i | AT91_MATRIX_EBI_CS3A_SMC_SMARTMEDIA);
/* 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 = SAM9260_PLL_A_MIN_IN_FREQ; /* 1 MHz */
clk->pll_max_in = SAM9260_PLL_A_MAX_IN_FREQ; /* 32 MHz */
clk->pll_min_out = SAM9260_PLL_A_MIN_OUT_FREQ; /* 80 MHz */
clk->pll_max_out = SAM9260_PLL_A_MAX_OUT_FREQ; /* 240 MHz */
clk->pll_mul_shift = SAM9260_PLL_A_MUL_SHIFT;
clk->pll_mul_mask = SAM9260_PLL_A_MUL_MASK;
clk->pll_div_shift = SAM9260_PLL_A_DIV_SHIFT;
clk->pll_div_mask = SAM9260_PLL_A_DIV_MASK;
clk->set_outb = at91_pll_outa;
at91_pmc_clock_deref(clk);
/*
* Fudge MAX pll in frequence down below 3.0 MHz to ensure
* PMC alogrithm choose the divisor that causes the input clock
* to be near the optimal 2 MHz per datasheet. We know
* we are going to be using this for the USB clock at 96 MHz.
* Causes no extra frequency deviation for all recomended crystal
* values.
*/
clk = at91_pmc_clock_ref("pllb");
clk->pll_min_in = SAM9260_PLL_B_MIN_IN_FREQ; /* 1 MHz */
clk->pll_max_in = SAM9260_PLL_B_MAX_IN_FREQ; /* 5 MHz */
clk->pll_max_in = 2999999; /* ~3 MHz */
clk->pll_min_out = SAM9260_PLL_B_MIN_OUT_FREQ; /* 70 MHz */
clk->pll_max_out = SAM9260_PLL_B_MAX_OUT_FREQ; /* 130 MHz */
clk->pll_mul_shift = SAM9260_PLL_B_MUL_SHIFT;
clk->pll_mul_mask = SAM9260_PLL_B_MUL_MASK;
clk->pll_div_shift = SAM9260_PLL_B_DIV_SHIFT;
clk->pll_div_mask = SAM9260_PLL_B_DIV_MASK;
clk->set_outb = at91_pll_outb;
at91_pmc_clock_deref(clk);
return (0);
}
static device_method_t at91sam9260_methods[] = {
DEVMETHOD(device_probe, at91_probe),
DEVMETHOD(device_attach, at91_attach),
DEVMETHOD(device_identify, at91_identify),
DEVMETHOD_END
};
static driver_t at91sam9260_driver = {
"at91sam9260",
at91sam9260_methods,
sizeof(struct at91sam9_softc),
};
static devclass_t at91sam9260_devclass;
DRIVER_MODULE(at91sam9260, atmelarm, at91sam9260_driver, at91sam9260_devclass,
NULL, NULL);