396 lines
11 KiB
C
396 lines
11 KiB
C
/*
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* arch/arm/mach-at91/at91rm9200.c
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*
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* Copyright (C) 2005 SAN People
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <asm/irq.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/system_misc.h>
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#include <mach/at91rm9200.h>
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#include <mach/at91_pmc.h>
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#include <mach/at91_st.h>
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#include <mach/cpu.h>
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#include "at91_aic.h"
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#include "soc.h"
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#include "generic.h"
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#include "clock.h"
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#include "sam9_smc.h"
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/* --------------------------------------------------------------------
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* Clocks
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* -------------------------------------------------------------------- */
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/*
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* The peripheral clocks.
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*/
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static struct clk udc_clk = {
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.name = "udc_clk",
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.pmc_mask = 1 << AT91RM9200_ID_UDP,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk ohci_clk = {
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.name = "ohci_clk",
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.pmc_mask = 1 << AT91RM9200_ID_UHP,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk ether_clk = {
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.name = "ether_clk",
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.pmc_mask = 1 << AT91RM9200_ID_EMAC,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk mmc_clk = {
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.name = "mci_clk",
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.pmc_mask = 1 << AT91RM9200_ID_MCI,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk twi_clk = {
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.name = "twi_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TWI,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk usart0_clk = {
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.name = "usart0_clk",
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.pmc_mask = 1 << AT91RM9200_ID_US0,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk usart1_clk = {
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.name = "usart1_clk",
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.pmc_mask = 1 << AT91RM9200_ID_US1,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk usart2_clk = {
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.name = "usart2_clk",
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.pmc_mask = 1 << AT91RM9200_ID_US2,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk usart3_clk = {
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.name = "usart3_clk",
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.pmc_mask = 1 << AT91RM9200_ID_US3,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk spi_clk = {
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.name = "spi_clk",
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.pmc_mask = 1 << AT91RM9200_ID_SPI,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk pioA_clk = {
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.name = "pioA_clk",
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.pmc_mask = 1 << AT91RM9200_ID_PIOA,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk pioB_clk = {
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.name = "pioB_clk",
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.pmc_mask = 1 << AT91RM9200_ID_PIOB,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk pioC_clk = {
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.name = "pioC_clk",
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.pmc_mask = 1 << AT91RM9200_ID_PIOC,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk pioD_clk = {
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.name = "pioD_clk",
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.pmc_mask = 1 << AT91RM9200_ID_PIOD,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk ssc0_clk = {
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.name = "ssc0_clk",
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.pmc_mask = 1 << AT91RM9200_ID_SSC0,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk ssc1_clk = {
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.name = "ssc1_clk",
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.pmc_mask = 1 << AT91RM9200_ID_SSC1,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk ssc2_clk = {
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.name = "ssc2_clk",
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.pmc_mask = 1 << AT91RM9200_ID_SSC2,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc0_clk = {
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.name = "tc0_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC0,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc1_clk = {
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.name = "tc1_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC1,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc2_clk = {
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.name = "tc2_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC2,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc3_clk = {
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.name = "tc3_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC3,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc4_clk = {
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.name = "tc4_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC4,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk tc5_clk = {
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.name = "tc5_clk",
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.pmc_mask = 1 << AT91RM9200_ID_TC5,
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.type = CLK_TYPE_PERIPHERAL,
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};
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static struct clk *periph_clocks[] __initdata = {
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&pioA_clk,
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&pioB_clk,
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&pioC_clk,
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&pioD_clk,
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&usart0_clk,
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&usart1_clk,
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&usart2_clk,
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&usart3_clk,
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&mmc_clk,
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&udc_clk,
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&twi_clk,
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&spi_clk,
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&ssc0_clk,
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&ssc1_clk,
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&ssc2_clk,
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&tc0_clk,
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&tc1_clk,
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&tc2_clk,
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&tc3_clk,
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&tc4_clk,
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&tc5_clk,
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&ohci_clk,
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ðer_clk,
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// irq0 .. irq6
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};
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static struct clk_lookup periph_clocks_lookups[] = {
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CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.0", &tc0_clk),
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CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.0", &tc1_clk),
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CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.0", &tc2_clk),
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CLKDEV_CON_DEV_ID("t0_clk", "atmel_tcb.1", &tc3_clk),
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CLKDEV_CON_DEV_ID("t1_clk", "atmel_tcb.1", &tc4_clk),
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CLKDEV_CON_DEV_ID("t2_clk", "atmel_tcb.1", &tc5_clk),
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CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.0", &ssc0_clk),
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CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.1", &ssc1_clk),
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CLKDEV_CON_DEV_ID("pclk", "at91rm9200_ssc.2", &ssc2_clk),
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CLKDEV_CON_DEV_ID("pclk", "fffd0000.ssc", &ssc0_clk),
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CLKDEV_CON_DEV_ID("pclk", "fffd4000.ssc", &ssc1_clk),
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CLKDEV_CON_DEV_ID("pclk", "fffd8000.ssc", &ssc2_clk),
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CLKDEV_CON_DEV_ID(NULL, "i2c-at91rm9200.0", &twi_clk),
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/* fake hclk clock */
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CLKDEV_CON_DEV_ID("hclk", "at91_ohci", &ohci_clk),
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CLKDEV_CON_ID("pioA", &pioA_clk),
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CLKDEV_CON_ID("pioB", &pioB_clk),
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CLKDEV_CON_ID("pioC", &pioC_clk),
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CLKDEV_CON_ID("pioD", &pioD_clk),
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/* usart lookup table for DT entries */
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CLKDEV_CON_DEV_ID("usart", "fffff200.serial", &mck),
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CLKDEV_CON_DEV_ID("usart", "fffc0000.serial", &usart0_clk),
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CLKDEV_CON_DEV_ID("usart", "fffc4000.serial", &usart1_clk),
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CLKDEV_CON_DEV_ID("usart", "fffc8000.serial", &usart2_clk),
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CLKDEV_CON_DEV_ID("usart", "fffcc000.serial", &usart3_clk),
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/* tc lookup table for DT entries */
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CLKDEV_CON_DEV_ID("t0_clk", "fffa0000.timer", &tc0_clk),
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CLKDEV_CON_DEV_ID("t1_clk", "fffa0000.timer", &tc1_clk),
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CLKDEV_CON_DEV_ID("t2_clk", "fffa0000.timer", &tc2_clk),
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CLKDEV_CON_DEV_ID("t0_clk", "fffa4000.timer", &tc3_clk),
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CLKDEV_CON_DEV_ID("t1_clk", "fffa4000.timer", &tc4_clk),
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CLKDEV_CON_DEV_ID("t2_clk", "fffa4000.timer", &tc5_clk),
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CLKDEV_CON_DEV_ID("mci_clk", "fffb4000.mmc", &mmc_clk),
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CLKDEV_CON_DEV_ID("emac_clk", "fffbc000.ethernet", ðer_clk),
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CLKDEV_CON_DEV_ID(NULL, "fffb8000.i2c", &twi_clk),
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CLKDEV_CON_DEV_ID("hclk", "300000.ohci", &ohci_clk),
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CLKDEV_CON_DEV_ID(NULL, "fffff400.gpio", &pioA_clk),
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CLKDEV_CON_DEV_ID(NULL, "fffff600.gpio", &pioB_clk),
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CLKDEV_CON_DEV_ID(NULL, "fffff800.gpio", &pioC_clk),
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CLKDEV_CON_DEV_ID(NULL, "fffffa00.gpio", &pioD_clk),
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};
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static struct clk_lookup usart_clocks_lookups[] = {
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CLKDEV_CON_DEV_ID("usart", "atmel_usart.0", &mck),
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CLKDEV_CON_DEV_ID("usart", "atmel_usart.1", &usart0_clk),
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CLKDEV_CON_DEV_ID("usart", "atmel_usart.2", &usart1_clk),
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CLKDEV_CON_DEV_ID("usart", "atmel_usart.3", &usart2_clk),
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CLKDEV_CON_DEV_ID("usart", "atmel_usart.4", &usart3_clk),
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};
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/*
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* The four programmable clocks.
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* You must configure pin multiplexing to bring these signals out.
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*/
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static struct clk pck0 = {
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.name = "pck0",
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.pmc_mask = AT91_PMC_PCK0,
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.type = CLK_TYPE_PROGRAMMABLE,
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.id = 0,
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};
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static struct clk pck1 = {
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.name = "pck1",
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.pmc_mask = AT91_PMC_PCK1,
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.type = CLK_TYPE_PROGRAMMABLE,
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.id = 1,
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};
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static struct clk pck2 = {
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.name = "pck2",
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.pmc_mask = AT91_PMC_PCK2,
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.type = CLK_TYPE_PROGRAMMABLE,
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.id = 2,
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};
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static struct clk pck3 = {
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.name = "pck3",
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.pmc_mask = AT91_PMC_PCK3,
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.type = CLK_TYPE_PROGRAMMABLE,
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.id = 3,
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};
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static void __init at91rm9200_register_clocks(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
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clk_register(periph_clocks[i]);
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clkdev_add_table(periph_clocks_lookups,
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ARRAY_SIZE(periph_clocks_lookups));
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clkdev_add_table(usart_clocks_lookups,
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ARRAY_SIZE(usart_clocks_lookups));
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clk_register(&pck0);
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clk_register(&pck1);
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clk_register(&pck2);
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clk_register(&pck3);
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}
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/* --------------------------------------------------------------------
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* GPIO
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* -------------------------------------------------------------------- */
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static struct at91_gpio_bank at91rm9200_gpio[] __initdata = {
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{
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.id = AT91RM9200_ID_PIOA,
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.regbase = AT91RM9200_BASE_PIOA,
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}, {
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.id = AT91RM9200_ID_PIOB,
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.regbase = AT91RM9200_BASE_PIOB,
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}, {
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.id = AT91RM9200_ID_PIOC,
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.regbase = AT91RM9200_BASE_PIOC,
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}, {
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.id = AT91RM9200_ID_PIOD,
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.regbase = AT91RM9200_BASE_PIOD,
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}
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};
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static void at91rm9200_idle(void)
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{
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/*
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* Disable the processor clock. The processor will be automatically
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* re-enabled by an interrupt or by a reset.
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*/
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at91_pmc_write(AT91_PMC_SCDR, AT91_PMC_PCK);
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}
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static void at91rm9200_restart(enum reboot_mode reboot_mode, const char *cmd)
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{
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/*
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* Perform a hardware reset with the use of the Watchdog timer.
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*/
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at91_st_write(AT91_ST_WDMR, AT91_ST_RSTEN | AT91_ST_EXTEN | 1);
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at91_st_write(AT91_ST_CR, AT91_ST_WDRST);
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}
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/* --------------------------------------------------------------------
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* AT91RM9200 processor initialization
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* -------------------------------------------------------------------- */
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static void __init at91rm9200_map_io(void)
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{
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/* Map peripherals */
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at91_init_sram(0, AT91RM9200_SRAM_BASE, AT91RM9200_SRAM_SIZE);
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}
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static void __init at91rm9200_ioremap_registers(void)
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{
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at91rm9200_ioremap_st(AT91RM9200_BASE_ST);
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at91_ioremap_ramc(0, AT91RM9200_BASE_MC, 256);
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}
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static void __init at91rm9200_initialize(void)
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{
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arm_pm_idle = at91rm9200_idle;
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arm_pm_restart = at91rm9200_restart;
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/* Initialize GPIO subsystem */
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at91_gpio_init(at91rm9200_gpio,
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cpu_is_at91rm9200_bga() ? AT91RM9200_BGA : AT91RM9200_PQFP);
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}
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/* --------------------------------------------------------------------
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* Interrupt initialization
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* -------------------------------------------------------------------- */
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/*
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* The default interrupt priority levels (0 = lowest, 7 = highest).
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*/
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static unsigned int at91rm9200_default_irq_priority[NR_AIC_IRQS] __initdata = {
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7, /* Advanced Interrupt Controller (FIQ) */
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7, /* System Peripherals */
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1, /* Parallel IO Controller A */
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1, /* Parallel IO Controller B */
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1, /* Parallel IO Controller C */
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1, /* Parallel IO Controller D */
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5, /* USART 0 */
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5, /* USART 1 */
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5, /* USART 2 */
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5, /* USART 3 */
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0, /* Multimedia Card Interface */
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2, /* USB Device Port */
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6, /* Two-Wire Interface */
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5, /* Serial Peripheral Interface */
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4, /* Serial Synchronous Controller 0 */
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4, /* Serial Synchronous Controller 1 */
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4, /* Serial Synchronous Controller 2 */
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0, /* Timer Counter 0 */
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0, /* Timer Counter 1 */
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0, /* Timer Counter 2 */
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0, /* Timer Counter 3 */
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0, /* Timer Counter 4 */
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0, /* Timer Counter 5 */
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2, /* USB Host port */
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3, /* Ethernet MAC */
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0, /* Advanced Interrupt Controller (IRQ0) */
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0, /* Advanced Interrupt Controller (IRQ1) */
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0, /* Advanced Interrupt Controller (IRQ2) */
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0, /* Advanced Interrupt Controller (IRQ3) */
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0, /* Advanced Interrupt Controller (IRQ4) */
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0, /* Advanced Interrupt Controller (IRQ5) */
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0 /* Advanced Interrupt Controller (IRQ6) */
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};
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AT91_SOC_START(at91rm9200)
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.map_io = at91rm9200_map_io,
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.default_irq_priority = at91rm9200_default_irq_priority,
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.extern_irq = (1 << AT91RM9200_ID_IRQ0) | (1 << AT91RM9200_ID_IRQ1)
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| (1 << AT91RM9200_ID_IRQ2) | (1 << AT91RM9200_ID_IRQ3)
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| (1 << AT91RM9200_ID_IRQ4) | (1 << AT91RM9200_ID_IRQ5)
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| (1 << AT91RM9200_ID_IRQ6),
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.ioremap_registers = at91rm9200_ioremap_registers,
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.register_clocks = at91rm9200_register_clocks,
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.init = at91rm9200_initialize,
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AT91_SOC_END
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