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freebsd/sys/arm/at91/at91rm9200.c
Warner Losh 6a7be52dbe Strip trailing whitespace before other changes.
2012-06-13 04:52:19 +00:00

324 lines
9.7 KiB
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/*-
* 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("$FreeBSD$");
#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/at91rm92reg.h>
#include <arm/at91/at91_aicreg.h>
#include <arm/at91/at91_pmcreg.h>
#include <arm/at91/at91_pmcvar.h>
struct at91rm92_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, which differ
* a little form the ones that are in the standard distribution. Also,
* the ones marked with 'TWEEK' are different based on experience.
*/
static const int at91_irq_prio[32] =
{
7, /* Advanced Interrupt Controller (FIQ) */
7, /* System Peripherals */
1, /* Parallel IO Controller A */
1, /* Parallel IO Controller B */
1, /* Parallel IO Controller C */
1, /* Parallel IO Controller D */
5, /* USART 0 */
5, /* USART 1 */
5, /* USART 2 */
5, /* USART 3 */
0, /* Multimedia Card Interface */
2, /* USB Device Port */
4, /* Two-Wire Interface */ /* TWEEK */
5, /* Serial Peripheral Interface */
4, /* Serial Synchronous Controller 0 */
6, /* Serial Synchronous Controller 1 */ /* TWEEK */
4, /* Serial Synchronous Controller 2 */
0, /* Timer Counter 0 */
6, /* Timer Counter 1 */ /* TWEEK */
0, /* Timer Counter 2 */
0, /* Timer Counter 3 */
0, /* Timer Counter 4 */
0, /* Timer Counter 5 */
2, /* USB Host port */
3, /* Ethernet MAC */
0, /* Advanced Interrupt Controller (IRQ0) */
0, /* Advanced Interrupt Controller (IRQ1) */
0, /* Advanced Interrupt Controller (IRQ2) */
0, /* Advanced Interrupt Controller (IRQ3) */
0, /* Advanced Interrupt Controller (IRQ4) */
0, /* Advanced Interrupt Controller (IRQ5) */
0 /* Advanced Interrupt Controller (IRQ6) */
};
#define DEVICE(_name, _id, _unit) \
{ \
_name, _unit, \
AT91RM92_ ## _id ##_BASE, \
AT91RM92_ ## _id ## _SIZE, \
AT91RM92_IRQ_ ## _id \
}
static const struct cpu_devs at91_devs[] =
{
DEVICE("at91_pmc", PMC, 0),
DEVICE("at91_st", ST, 0),
DEVICE("at91_pio", PIOA, 0),
DEVICE("at91_pio", PIOB, 1),
DEVICE("at91_pio", PIOC, 2),
DEVICE("at91_pio", PIOD, 3),
DEVICE("at91_rtc", RTC, 0),
DEVICE("at91_mci", MCI, 0),
DEVICE("at91_twi", TWI, 0),
DEVICE("at91_udp", UDP, 0),
DEVICE("ate", EMAC, 0),
DEVICE("at91_ssc", SSC0, 0),
DEVICE("at91_ssc", SSC1, 1),
DEVICE("at91_ssc", SSC2, 2),
DEVICE("spi", SPI, 0),
DEVICE("uart", DBGU, 0),
DEVICE("uart", USART0, 1),
DEVICE("uart", USART1, 2),
DEVICE("uart", USART2, 3),
DEVICE("uart", USART3, 4),
DEVICE("at91_aic", AIC, 0),
DEVICE("at91_mc", MC, 0),
DEVICE("at91_tc", TC0, 0),
DEVICE("at91_tc", TC1, 1),
DEVICE("ohci", OHCI, 0),
DEVICE("af91_cfata", CF, 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 != AT91RM92_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 < AT91RM92_BASE)
addr += AT91RM92_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_outb(int freq)
{
if (freq > 155000000)
return (0x0000);
else
return (0x8000);
}
static void
at91_identify(driver_t *drv, device_t parent)
{
if (at91_cpu_is(AT91_T_RM9200)) {
at91_add_child(parent, 0, "at91rm920", 0, 0, 0, -1, 0, 0);
at91_cpu_add_builtin_children(parent);
}
}
static int
at91_probe(device_t dev)
{
device_set_desc(dev, soc_data.name);
return (0);
}
static int
at91_attach(device_t dev)
{
struct at91_pmc_clock *clk;
struct at91rm92_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, AT91RM92_SYS_BASE,
AT91RM92_SYS_SIZE, &sc->sc_sys_sh) != 0)
panic("Enable to map system registers");
if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91RM92_DBGU_BASE,
AT91RM92_DBGU_SIZE, &sc->sc_dbg_sh) != 0)
panic("Enable to map DBGU registers");
if (bus_space_subregion(sc->sc_st, sc->sc_sh, AT91RM92_AIC_BASE,
AT91RM92_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 = AT91RM92_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 RTC (0xe24 == RTC_IDR) */
bus_space_write_4(sc->sc_st, sc->sc_sys_sh, 0xe24, 0xffffffff);
/* Disable all interrupts for the SDRAM controller */
bus_space_write_4(sc->sc_st, sc->sc_sys_sh, 0xfa8, 0xffffffff);
/* Disable all interrupts for DBGU */
bus_space_write_4(sc->sc_st, sc->sc_dbg_sh, 0x0c, 0xffffffff);
/* Update USB device port clock info */
clk = at91_pmc_clock_ref("udpck");
clk->pmc_mask = PMC_SCER_UDP;
at91_pmc_clock_deref(clk);
/* Update USB host port clock info */
clk = at91_pmc_clock_ref("uhpck");
clk->pmc_mask = PMC_SCER_UHP;
at91_pmc_clock_deref(clk);
/* Each SOC has different PLL contraints */
clk = at91_pmc_clock_ref("plla");
clk->pll_min_in = RM9200_PLL_A_MIN_IN_FREQ; /* 1 MHz */
clk->pll_max_in = RM9200_PLL_A_MAX_IN_FREQ; /* 32 MHz */
clk->pll_min_out = RM9200_PLL_A_MIN_OUT_FREQ; /* 80 MHz */
clk->pll_max_out = RM9200_PLL_A_MAX_OUT_FREQ; /* 180 MHz */
clk->pll_mul_shift = RM9200_PLL_A_MUL_SHIFT;
clk->pll_mul_mask = RM9200_PLL_A_MUL_MASK;
clk->pll_div_shift = RM9200_PLL_A_DIV_SHIFT;
clk->pll_div_mask = RM9200_PLL_A_DIV_MASK;
clk->set_outb = at91_pll_outb;
at91_pmc_clock_deref(clk);
clk = at91_pmc_clock_ref("pllb");
clk->pll_min_in = RM9200_PLL_B_MIN_IN_FREQ; /* 100 KHz */
clk->pll_max_in = RM9200_PLL_B_MAX_IN_FREQ; /* 32 MHz */
clk->pll_min_out = RM9200_PLL_B_MIN_OUT_FREQ; /* 30 MHz */
clk->pll_max_out = RM9200_PLL_B_MAX_OUT_FREQ; /* 240 MHz */
clk->pll_mul_shift = RM9200_PLL_B_MUL_SHIFT;
clk->pll_mul_mask = RM9200_PLL_B_MUL_MASK;
clk->pll_div_shift = RM9200_PLL_B_DIV_SHIFT;
clk->pll_div_mask = RM9200_PLL_B_DIV_MASK;
clk->set_outb = at91_pll_outb;
at91_pmc_clock_deref(clk);
return (0);
}
static device_method_t at91_methods[] = {
DEVMETHOD(device_probe, at91_probe),
DEVMETHOD(device_attach, at91_attach),
DEVMETHOD(device_identify, at91_identify),
{0, 0},
};
static driver_t at91rm92_driver = {
"at91rm920",
at91_methods,
sizeof(struct at91rm92_softc),
};
static devclass_t at91rm92_devclass;
DRIVER_MODULE(at91rm920, atmelarm, at91rm92_driver, at91rm92_devclass, 0, 0);
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