davinci: Initial support for MityDSP-L138/MityARM-1808

This patch adds initial support for the MityDSP-L138 and MityDSP-1808 system
on Module (SOM) under the machine name "mityomapl138".  These SOMs are based
on the da850 davinci CPU architecture.  Information on these SOMs may be
found at http://www.mitydsp.com.

Basic support for the console UART, NAND, and EMAC (MII interface) is
included in this patch.

Signed-off-by: Michael Williamson <michael.williamson@criticallink.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 221 insertions, 0 deletions

diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
new file mode 100644
index 000000000000..7146916fa498
--- /dev/null
+++ b/arch/arm/mach-davinci/board-mityomapl138.c
@@ -0,0 +1,221 @@
+/*
+ * Critical Link MityOMAP-L138 SoM
+ *
+ * Copyright (C) 2010 Critical Link LLC - http://www.criticallink.com
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2. This program is licensed "as is" without any warranty of
+ * any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/common.h>
+#include <mach/cp_intc.h>
+#include <mach/da8xx.h>
+#include <mach/nand.h>
+#include <mach/mux.h>
+
+#define MITYOMAPL138_PHY_MASK           0x08 /* hardcoded for now */
+#define MITYOMAPL138_MDIO_FREQUENCY     (2200000) /* PHY bus frequency */
+
+/*
+ * MityDSP-L138 includes a 256 MByte large-page NAND flash
+ * (128K blocks).
+ */
+struct mtd_partition mityomapl138_nandflash_partition[] = {
+        {
+                .name           = "rootfs",
+                .offset         = 0,
+                .size           = SZ_128M,
+                .mask_flags     = 0, /* MTD_WRITEABLE, */
+        },
+        {
+                .name           = "homefs",
+                .offset         = MTDPART_OFS_APPEND,
+                .size           = MTDPART_SIZ_FULL,
+                .mask_flags     = 0,
+        },
+};
+
+static struct davinci_nand_pdata mityomapl138_nandflash_data = {
+        .parts          = mityomapl138_nandflash_partition,
+        .nr_parts       = ARRAY_SIZE(mityomapl138_nandflash_partition),
+        .ecc_mode       = NAND_ECC_HW,
+        .options        = NAND_USE_FLASH_BBT | NAND_BUSWIDTH_16,
+        .ecc_bits       = 1, /* 4 bit mode is not supported with 16 bit NAND */
+};
+
+static struct resource mityomapl138_nandflash_resource[] = {
+        {
+                .start  = DA8XX_AEMIF_CS3_BASE,
+                .end    = DA8XX_AEMIF_CS3_BASE + SZ_512K + 2 * SZ_1K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .start  = DA8XX_AEMIF_CTL_BASE,
+                .end    = DA8XX_AEMIF_CTL_BASE + SZ_32K - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+};
+
+static struct platform_device mityomapl138_nandflash_device = {
+        .name           = "davinci_nand",
+        .id             = 0,
+        .dev            = {
+                .platform_data  = &mityomapl138_nandflash_data,
+        },
+        .num_resources  = ARRAY_SIZE(mityomapl138_nandflash_resource),
+        .resource       = mityomapl138_nandflash_resource,
+};
+
+static struct platform_device *mityomapl138_devices[] __initdata = {
+        &mityomapl138_nandflash_device,
+};
+
+static void __init mityomapl138_setup_nand(void)
+{
+        platform_add_devices(mityomapl138_devices,
+                                 ARRAY_SIZE(mityomapl138_devices));
+}
+
+static struct davinci_uart_config mityomapl138_uart_config __initdata = {
+        .enabled_uarts = 0x7,
+};
+
+static const short mityomap_mii_pins[] = {
+        DA850_MII_TXEN, DA850_MII_TXCLK, DA850_MII_COL, DA850_MII_TXD_3,
+        DA850_MII_TXD_2, DA850_MII_TXD_1, DA850_MII_TXD_0, DA850_MII_RXER,
+        DA850_MII_CRS, DA850_MII_RXCLK, DA850_MII_RXDV, DA850_MII_RXD_3,
+        DA850_MII_RXD_2, DA850_MII_RXD_1, DA850_MII_RXD_0, DA850_MDIO_CLK,
+        DA850_MDIO_D,
+        -1
+};
+
+static const short mityomap_rmii_pins[] = {
+        DA850_RMII_TXD_0, DA850_RMII_TXD_1, DA850_RMII_TXEN,
+        DA850_RMII_CRS_DV, DA850_RMII_RXD_0, DA850_RMII_RXD_1,
+        DA850_RMII_RXER, DA850_RMII_MHZ_50_CLK, DA850_MDIO_CLK,
+        DA850_MDIO_D,
+        -1
+};
+
+static void __init mityomapl138_config_emac(void)
+{
+        void __iomem *cfg_chip3_base;
+        int ret;
+        u32 val;
+        struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+        soc_info->emac_pdata->rmii_en = 0; /* hardcoded for now */
+
+        cfg_chip3_base = DA8XX_SYSCFG0_VIRT(DA8XX_CFGCHIP3_REG);
+        val = __raw_readl(cfg_chip3_base);
+
+        if (soc_info->emac_pdata->rmii_en) {
+                val |= BIT(8);
+                ret = davinci_cfg_reg_list(mityomap_rmii_pins);
+                pr_info("RMII PHY configured\n");
+        } else {
+                val &= ~BIT(8);
+                ret = davinci_cfg_reg_list(mityomap_mii_pins);
+                pr_info("MII PHY configured\n");
+        }
+
+        if (ret) {
+                pr_warning("mii/rmii mux setup failed: %d\n", ret);
+                return;
+        }
+
+        /* configure the CFGCHIP3 register for RMII or MII */
+        __raw_writel(val, cfg_chip3_base);
+
+        soc_info->emac_pdata->phy_mask = MITYOMAPL138_PHY_MASK;
+        pr_debug("setting phy_mask to %x\n", soc_info->emac_pdata->phy_mask);
+        soc_info->emac_pdata->mdio_max_freq = MITYOMAPL138_MDIO_FREQUENCY;
+
+        ret = da8xx_register_emac();
+        if (ret)
+                pr_warning("emac registration failed: %d\n", ret);
+}
+
+static struct davinci_pm_config da850_pm_pdata = {
+        .sleepcount = 128,
+};
+
+static struct platform_device da850_pm_device = {
+        .name   = "pm-davinci",
+        .dev = {
+                .platform_data  = &da850_pm_pdata,
+        },
+        .id     = -1,
+};
+
+static void __init mityomapl138_init(void)
+{
+        int ret;
+
+        /* for now, no special EDMA channels are reserved */
+        ret = da850_register_edma(NULL);
+        if (ret)
+                pr_warning("edma registration failed: %d\n", ret);
+
+        ret = da8xx_register_watchdog();
+        if (ret)
+                pr_warning("watchdog registration failed: %d\n", ret);
+
+        davinci_serial_init(&mityomapl138_uart_config);
+
+        mityomapl138_setup_nand();
+
+        mityomapl138_config_emac();
+
+        ret = da8xx_register_rtc();
+        if (ret)
+                pr_warning("rtc setup failed: %d\n", ret);
+
+        ret = da850_register_cpufreq("pll0_sysclk3");
+        if (ret)
+                pr_warning("cpufreq registration failed: %d\n", ret);
+
+        ret = da8xx_register_cpuidle();
+        if (ret)
+                pr_warning("cpuidle registration failed: %d\n", ret);
+
+        ret = da850_register_pm(&da850_pm_device);
+        if (ret)
+                pr_warning("da850_evm_init: suspend registration failed: %d\n",
+                                ret);
+}
+
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+static int __init mityomapl138_console_init(void)
+{
+        if (!machine_is_mityomapl138())
+                return 0;
+
+        return add_preferred_console("ttyS", 1, "115200");
+}
+console_initcall(mityomapl138_console_init);
+#endif
+
+static void __init mityomapl138_map_io(void)
+{
+        da850_init();
+}
+
+MACHINE_START(MITYOMAPL138, "MityDSP-L138/MityARM-1808")
+        .phys_io        = IO_PHYS,
+        .io_pg_offst    = (__IO_ADDRESS(IO_PHYS) >> 18) & 0xfffc,
+        .boot_params    = (DA8XX_DDR_BASE + 0x100),
+        .map_io         = mityomapl138_map_io,
+        .init_irq       = cp_intc_init,
+        .timer          = &davinci_timer,
+        .init_machine   = mityomapl138_init,
+MACHINE_END