[ARM] 3948/1: AT91: Initial support for AT91SAM9261 and AT91SAM9260

This patch adds the initial support for the newer Atmel AT91SAM9261 and
AT91SAM9260 processors.  The code is based on, and makes use of, the
existing AT91RM9200 support.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 289 insertions, 0 deletions

diff --git a/arch/arm/mach-at91rm9200/at91sam9261.c b/arch/arm/mach-at91rm9200/at91sam9261.c
new file mode 100644
index 000000000000..5a82f35da2e9
--- /dev/null
+++ b/arch/arm/mach-at91rm9200/at91sam9261.c
@@ -0,0 +1,289 @@
+/*
+ * arch/arm/mach-at91rm9200/at91sam9261.c
+ *
+ *  Copyright (C) 2005 SAN People
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/arch/at91sam9261.h>
+#include <asm/arch/at91_pmc.h>
+
+#include "generic.h"
+#include "clock.h"
+
+static struct map_desc at91sam9261_io_desc[] __initdata = {
+        {
+                .virtual        = AT91_VA_BASE_SYS,
+                .pfn            = __phys_to_pfn(AT91_BASE_SYS),
+                .length         = SZ_16K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = AT91_IO_VIRT_BASE - AT91SAM9261_SRAM_SIZE,
+                .pfn            = __phys_to_pfn(AT91SAM9261_SRAM_BASE),
+                .length         = AT91SAM9261_SRAM_SIZE,
+                .type           = MT_DEVICE,
+        },
+};
+
+/* --------------------------------------------------------------------
+ *  Clocks
+ * -------------------------------------------------------------------- */
+
+/*
+ * The peripheral clocks.
+ */
+static struct clk pioA_clk = {
+        .name           = "pioA_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_PIOA,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioB_clk = {
+        .name           = "pioB_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_PIOB,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk pioC_clk = {
+        .name           = "pioC_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_PIOC,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart0_clk = {
+        .name           = "usart0_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_US0,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart1_clk = {
+        .name           = "usart1_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_US1,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk usart2_clk = {
+        .name           = "usart2_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_US2,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk mmc_clk = {
+        .name           = "mci_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_MCI,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk udc_clk = {
+        .name           = "udc_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_UDP,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk twi_clk = {
+        .name           = "twi_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_TWI,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk spi0_clk = {
+        .name           = "spi0_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_SPI0,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk spi1_clk = {
+        .name           = "spi1_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_SPI1,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk ohci_clk = {
+        .name           = "ohci_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_UHP,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+static struct clk lcdc_clk = {
+        .name           = "lcdc_clk",
+        .pmc_mask       = 1 << AT91SAM9261_ID_LCDC,
+        .type           = CLK_TYPE_PERIPHERAL,
+};
+
+static struct clk *periph_clocks[] __initdata = {
+        &pioA_clk,
+        &pioB_clk,
+        &pioC_clk,
+        &usart0_clk,
+        &usart1_clk,
+        &usart2_clk,
+        &mmc_clk,
+        &udc_clk,
+        &twi_clk,
+        &spi0_clk,
+        &spi1_clk,
+        // ssc 0 .. ssc2
+        // tc0 .. tc2
+        &ohci_clk,
+        &lcdc_clk,
+        // irq0 .. irq2
+};
+
+/*
+ * The four 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 struct clk pck2 = {
+        .name           = "pck2",
+        .pmc_mask       = AT91_PMC_PCK2,
+        .type           = CLK_TYPE_PROGRAMMABLE,
+        .id             = 2,
+};
+static struct clk pck3 = {
+        .name           = "pck3",
+        .pmc_mask       = AT91_PMC_PCK3,
+        .type           = CLK_TYPE_PROGRAMMABLE,
+        .id             = 3,
+};
+
+/* HClocks */
+static struct clk hck0 = {
+        .name           = "hck0",
+        .pmc_mask       = AT91_PMC_HCK0,
+        .type           = CLK_TYPE_SYSTEM,
+        .id             = 0,
+};
+static struct clk hck1 = {
+        .name           = "hck1",
+        .pmc_mask       = AT91_PMC_HCK1,
+        .type           = CLK_TYPE_SYSTEM,
+        .id             = 1,
+};
+
+static void __init at91sam9261_register_clocks(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(periph_clocks); i++)
+                clk_register(periph_clocks[i]);
+
+        clk_register(&pck0);
+        clk_register(&pck1);
+        clk_register(&pck2);
+        clk_register(&pck3);
+
+        clk_register(&hck0);
+        clk_register(&hck1);
+}
+
+/* --------------------------------------------------------------------
+ *  GPIO
+ * -------------------------------------------------------------------- */
+
+static struct at91_gpio_bank at91sam9261_gpio[] = {
+        {
+                .id             = AT91SAM9261_ID_PIOA,
+                .offset         = AT91_PIOA,
+                .clock          = &pioA_clk,
+        }, {
+                .id             = AT91SAM9261_ID_PIOB,
+                .offset         = AT91_PIOB,
+                .clock          = &pioB_clk,
+        }, {
+                .id             = AT91SAM9261_ID_PIOC,
+                .offset         = AT91_PIOC,
+                .clock          = &pioC_clk,
+        }
+};
+
+static void at91sam9261_reset(void)
+{
+#warning "Implement CPU reset"
+}
+
+
+/* --------------------------------------------------------------------
+ *  AT91SAM9261 processor initialization
+ * -------------------------------------------------------------------- */
+
+void __init at91sam9261_initialize(unsigned long main_clock)
+{
+        /* Map peripherals */
+        iotable_init(at91sam9261_io_desc, ARRAY_SIZE(at91sam9261_io_desc));
+
+        at91_arch_reset = at91sam9261_reset;
+        at91_extern_irq = (1 << AT91SAM9261_ID_IRQ0) | (1 << AT91SAM9261_ID_IRQ1)
+                        | (1 << AT91SAM9261_ID_IRQ2);
+
+        /* Init clock subsystem */
+        at91_clock_init(main_clock);
+
+        /* Register the processor-specific clocks */
+        at91sam9261_register_clocks();
+
+        /* Register GPIO subsystem */
+        at91_gpio_init(at91sam9261_gpio, 3);
+}
+
+/* --------------------------------------------------------------------
+ *  Interrupt initialization
+ * -------------------------------------------------------------------- */
+
+/*
+ * The default interrupt priority levels (0 = lowest, 7 = highest).
+ */
+static unsigned int at91sam9261_default_irq_priority[NR_AIC_IRQS] __initdata = {
+        7,      /* Advanced Interrupt Controller */
+        7,      /* System Peripherals */
+        0,      /* Parallel IO Controller A */
+        0,      /* Parallel IO Controller B */
+        0,      /* Parallel IO Controller C */
+        0,
+        6,      /* USART 0 */
+        6,      /* USART 1 */
+        6,      /* USART 2 */
+        0,      /* Multimedia Card Interface */
+        4,      /* USB Device Port */
+        0,      /* Two-Wire Interface */
+        6,      /* Serial Peripheral Interface 0 */
+        6,      /* Serial Peripheral Interface 1 */
+        5,      /* Serial Synchronous Controller 0 */
+        5,      /* Serial Synchronous Controller 1 */
+        5,      /* Serial Synchronous Controller 2 */
+        0,      /* Timer Counter 0 */
+        0,      /* Timer Counter 1 */
+        0,      /* Timer Counter 2 */
+        3,      /* USB Host port */
+        3,      /* LCD Controller */
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,      /* Advanced Interrupt Controller */
+        0,      /* Advanced Interrupt Controller */
+        0,      /* Advanced Interrupt Controller */
+};
+
+void __init at91sam9261_init_interrupts(unsigned int priority[NR_AIC_IRQS])
+{
+        if (!priority)
+                priority = at91sam9261_default_irq_priority;
+
+        /* Initialize the AIC interrupt controller */
+        at91_aic_init(priority);
+
+        /* Enable GPIO interrupts */
+        at91_gpio_irq_setup();
+}