384 строки
9.1 KiB
C
384 строки
9.1 KiB
C
/*
|
|
* arch/arm/mach-at91/at91sam9rl.c
|
|
*
|
|
* Copyright (C) 2005 SAN People
|
|
* Copyright (C) 2007 Atmel Corporation
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive for
|
|
* more details.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/pm.h>
|
|
|
|
#include <asm/irq.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/map.h>
|
|
#include <mach/cpu.h>
|
|
#include <mach/at91sam9rl.h>
|
|
#include <mach/at91_pmc.h>
|
|
#include <mach/at91_rstc.h>
|
|
#include <mach/at91_shdwc.h>
|
|
|
|
#include "generic.h"
|
|
#include "clock.h"
|
|
|
|
static struct map_desc at91sam9rl_io_desc[] __initdata = {
|
|
{
|
|
.virtual = AT91_VA_BASE_SYS,
|
|
.pfn = __phys_to_pfn(AT91_BASE_SYS),
|
|
.length = SZ_16K,
|
|
.type = MT_DEVICE,
|
|
},
|
|
};
|
|
|
|
static struct map_desc at91sam9rl_sram_desc[] __initdata = {
|
|
{
|
|
.pfn = __phys_to_pfn(AT91SAM9RL_SRAM_BASE),
|
|
.type = MT_DEVICE,
|
|
}
|
|
};
|
|
|
|
/* --------------------------------------------------------------------
|
|
* Clocks
|
|
* -------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* The peripheral clocks.
|
|
*/
|
|
static struct clk pioA_clk = {
|
|
.name = "pioA_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_PIOA,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pioB_clk = {
|
|
.name = "pioB_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_PIOB,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pioC_clk = {
|
|
.name = "pioC_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_PIOC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pioD_clk = {
|
|
.name = "pioD_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_PIOD,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart0_clk = {
|
|
.name = "usart0_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_US0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart1_clk = {
|
|
.name = "usart1_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_US1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart2_clk = {
|
|
.name = "usart2_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_US2,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk usart3_clk = {
|
|
.name = "usart3_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_US3,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk mmc_clk = {
|
|
.name = "mci_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_MCI,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk twi0_clk = {
|
|
.name = "twi0_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TWI0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk twi1_clk = {
|
|
.name = "twi1_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TWI1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk spi_clk = {
|
|
.name = "spi_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_SPI,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk ssc0_clk = {
|
|
.name = "ssc0_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_SSC0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk ssc1_clk = {
|
|
.name = "ssc1_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_SSC1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk tc0_clk = {
|
|
.name = "tc0_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TC0,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk tc1_clk = {
|
|
.name = "tc1_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TC1,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk tc2_clk = {
|
|
.name = "tc2_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TC2,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk pwm_clk = {
|
|
.name = "pwm_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_PWMC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk tsc_clk = {
|
|
.name = "tsc_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_TSC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk dma_clk = {
|
|
.name = "dma_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_DMA,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk udphs_clk = {
|
|
.name = "udphs_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_UDPHS,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk lcdc_clk = {
|
|
.name = "lcdc_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_LCDC,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
static struct clk ac97_clk = {
|
|
.name = "ac97_clk",
|
|
.pmc_mask = 1 << AT91SAM9RL_ID_AC97C,
|
|
.type = CLK_TYPE_PERIPHERAL,
|
|
};
|
|
|
|
static struct clk *periph_clocks[] __initdata = {
|
|
&pioA_clk,
|
|
&pioB_clk,
|
|
&pioC_clk,
|
|
&pioD_clk,
|
|
&usart0_clk,
|
|
&usart1_clk,
|
|
&usart2_clk,
|
|
&usart3_clk,
|
|
&mmc_clk,
|
|
&twi0_clk,
|
|
&twi1_clk,
|
|
&spi_clk,
|
|
&ssc0_clk,
|
|
&ssc1_clk,
|
|
&tc0_clk,
|
|
&tc1_clk,
|
|
&tc2_clk,
|
|
&pwm_clk,
|
|
&tsc_clk,
|
|
&dma_clk,
|
|
&udphs_clk,
|
|
&lcdc_clk,
|
|
&ac97_clk,
|
|
// irq0
|
|
};
|
|
|
|
static struct clk_lookup periph_clocks_lookups[] = {
|
|
CLKDEV_CON_DEV_ID("hclk", "atmel_usba_udc.0", &utmi_clk),
|
|
CLKDEV_CON_DEV_ID("pclk", "atmel_usba_udc.0", &udphs_clk),
|
|
CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
|
|
CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
|
|
CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
|
|
CLKDEV_CON_DEV_ID("pclk", "ssc.0", &ssc0_clk),
|
|
CLKDEV_CON_DEV_ID("pclk", "ssc.1", &ssc1_clk),
|
|
};
|
|
|
|
static struct clk_lookup usart_clocks_lookups[] = {
|
|
CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
|
|
CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
|
|
CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
|
|
};
|
|
|
|
/*
|
|
* The two 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 void __init at91sam9rl_register_clocks(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
|
|
clk_register(periph_clocks[i]);
|
|
|
|
clkdev_add_table(periph_clocks_lookups,
|
|
ARRAY_SIZE(periph_clocks_lookups));
|
|
clkdev_add_table(usart_clocks_lookups,
|
|
ARRAY_SIZE(usart_clocks_lookups));
|
|
|
|
clk_register(&pck0);
|
|
clk_register(&pck1);
|
|
}
|
|
|
|
static struct clk_lookup console_clock_lookup;
|
|
|
|
void __init at91sam9rl_set_console_clock(int id)
|
|
{
|
|
if (id >= ARRAY_SIZE(usart_clocks_lookups))
|
|
return;
|
|
|
|
console_clock_lookup.con_id = "usart";
|
|
console_clock_lookup.clk = usart_clocks_lookups[id].clk;
|
|
clkdev_add(&console_clock_lookup);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------
|
|
* GPIO
|
|
* -------------------------------------------------------------------- */
|
|
|
|
static struct at91_gpio_bank at91sam9rl_gpio[] = {
|
|
{
|
|
.id = AT91SAM9RL_ID_PIOA,
|
|
.offset = AT91_PIOA,
|
|
.clock = &pioA_clk,
|
|
}, {
|
|
.id = AT91SAM9RL_ID_PIOB,
|
|
.offset = AT91_PIOB,
|
|
.clock = &pioB_clk,
|
|
}, {
|
|
.id = AT91SAM9RL_ID_PIOC,
|
|
.offset = AT91_PIOC,
|
|
.clock = &pioC_clk,
|
|
}, {
|
|
.id = AT91SAM9RL_ID_PIOD,
|
|
.offset = AT91_PIOD,
|
|
.clock = &pioD_clk,
|
|
}
|
|
};
|
|
|
|
static void at91sam9rl_poweroff(void)
|
|
{
|
|
at91_sys_write(AT91_SHDW_CR, AT91_SHDW_KEY | AT91_SHDW_SHDW);
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------------
|
|
* AT91SAM9RL processor initialization
|
|
* -------------------------------------------------------------------- */
|
|
|
|
void __init at91sam9rl_map_io(void)
|
|
{
|
|
unsigned long cidr, sram_size;
|
|
|
|
/* Map peripherals */
|
|
iotable_init(at91sam9rl_io_desc, ARRAY_SIZE(at91sam9rl_io_desc));
|
|
|
|
cidr = at91_sys_read(AT91_DBGU_CIDR);
|
|
|
|
switch (cidr & AT91_CIDR_SRAMSIZ) {
|
|
case AT91_CIDR_SRAMSIZ_32K:
|
|
sram_size = 2 * SZ_16K;
|
|
break;
|
|
case AT91_CIDR_SRAMSIZ_16K:
|
|
default:
|
|
sram_size = SZ_16K;
|
|
}
|
|
|
|
at91sam9rl_sram_desc->virtual = AT91_IO_VIRT_BASE - sram_size;
|
|
at91sam9rl_sram_desc->length = sram_size;
|
|
|
|
/* Map SRAM */
|
|
iotable_init(at91sam9rl_sram_desc, ARRAY_SIZE(at91sam9rl_sram_desc));
|
|
}
|
|
|
|
void __init at91sam9rl_initialize(unsigned long main_clock)
|
|
{
|
|
at91_arch_reset = at91sam9_alt_reset;
|
|
pm_power_off = at91sam9rl_poweroff;
|
|
at91_extern_irq = (1 << AT91SAM9RL_ID_IRQ0);
|
|
|
|
/* Init clock subsystem */
|
|
at91_clock_init(main_clock);
|
|
|
|
/* Register the processor-specific clocks */
|
|
at91sam9rl_register_clocks();
|
|
|
|
/* Register GPIO subsystem */
|
|
at91_gpio_init(at91sam9rl_gpio, 4);
|
|
}
|
|
|
|
/* --------------------------------------------------------------------
|
|
* Interrupt initialization
|
|
* -------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* The default interrupt priority levels (0 = lowest, 7 = highest).
|
|
*/
|
|
static unsigned int at91sam9rl_default_irq_priority[NR_AIC_IRQS] __initdata = {
|
|
7, /* Advanced Interrupt Controller */
|
|
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 */
|
|
6, /* Two-Wire Interface 0 */
|
|
6, /* Two-Wire Interface 1 */
|
|
5, /* Serial Peripheral Interface */
|
|
4, /* Serial Synchronous Controller 0 */
|
|
4, /* Serial Synchronous Controller 1 */
|
|
0, /* Timer Counter 0 */
|
|
0, /* Timer Counter 1 */
|
|
0, /* Timer Counter 2 */
|
|
0,
|
|
0, /* Touch Screen Controller */
|
|
0, /* DMA Controller */
|
|
2, /* USB Device High speed port */
|
|
2, /* LCD Controller */
|
|
6, /* AC97 Controller */
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
0, /* Advanced Interrupt Controller */
|
|
};
|
|
|
|
void __init at91sam9rl_init_interrupts(unsigned int priority[NR_AIC_IRQS])
|
|
{
|
|
if (!priority)
|
|
priority = at91sam9rl_default_irq_priority;
|
|
|
|
/* Initialize the AIC interrupt controller */
|
|
at91_aic_init(priority);
|
|
|
|
/* Enable GPIO interrupts */
|
|
at91_gpio_irq_setup();
|
|
}
|