[ARM] 4370/3: AT91: Support for Atmel AT91SAM9RL processors.

Add support for Atmel's new AT91SAM9RL range of processors.
Includes similar peripherals as other AT91SAM9 processors, but with a
High-speed USB controller and various sizes of internal SRAM.

Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com>
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 341 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/at91sam9rl.c b/arch/arm/mach-at91/at91sam9rl.c
new file mode 100644
index 000000000000..4813a35f6cf5
--- /dev/null
+++ b/arch/arm/mach-at91/at91sam9rl.c
@@ -0,0 +1,341 @@
+/*
+ * 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 <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/at91sam9rl.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_rstc.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 pwmc_clk = {
+        .name           = "pwmc_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,
+        &pwmc_clk,
+        &tsc_clk,
+        &dma_clk,
+        &udphs_clk,
+        &lcdc_clk,
+        &ac97_clk,
+        // irq0
+};
+
+/*
+ * 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]);
+
+        clk_register(&pck0);
+        clk_register(&pck1);
+}
+
+/* --------------------------------------------------------------------
+ *  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_reset(void)
+{
+        at91_sys_write(AT91_RSTC_CR, AT91_RSTC_KEY | AT91_RSTC_PROCRST | AT91_RSTC_PERRST);
+}
+
+
+/* --------------------------------------------------------------------
+ *  AT91SAM9RL processor initialization
+ * -------------------------------------------------------------------- */
+
+void __init at91sam9rl_initialize(unsigned long main_clock)
+{
+        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));
+
+        at91_arch_reset = at91sam9rl_reset;
+        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();
+}