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common.c

/*
 * arch/arm/mach-kirkwood/common.c
 *
 * Core functions for Marvell Kirkwood SoCs
 *
 * 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/platform_device.h>
#include <linux/serial_8250.h>
#include <linux/mbus.h>
#include <linux/mv643xx_eth.h>
#include <linux/ata_platform.h>
#include <linux/spi/orion_spi.h>
#include <net/dsa.h>
#include <asm/page.h>
#include <asm/timex.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <mach/kirkwood.h>
#include <plat/cache-feroceon-l2.h>
#include <plat/ehci-orion.h>
#include <plat/mv_xor.h>
#include <plat/orion_nand.h>
#include <plat/time.h>
#include "common.h"

/*****************************************************************************
 * I/O Address Mapping
 ****************************************************************************/
static struct map_desc kirkwood_io_desc[] __initdata = {
      {
            .virtual    = KIRKWOOD_PCIE_IO_VIRT_BASE,
            .pfn        = __phys_to_pfn(KIRKWOOD_PCIE_IO_PHYS_BASE),
            .length           = KIRKWOOD_PCIE_IO_SIZE,
            .type       = MT_DEVICE,
      }, {
            .virtual    = KIRKWOOD_REGS_VIRT_BASE,
            .pfn        = __phys_to_pfn(KIRKWOOD_REGS_PHYS_BASE),
            .length           = KIRKWOOD_REGS_SIZE,
            .type       = MT_DEVICE,
      },
};

void __init kirkwood_map_io(void)
{
      iotable_init(kirkwood_io_desc, ARRAY_SIZE(kirkwood_io_desc));
}


/*****************************************************************************
 * EHCI
 ****************************************************************************/
static struct orion_ehci_data kirkwood_ehci_data = {
      .dram       = &kirkwood_mbus_dram_info,
};

static u64 ehci_dmamask = 0xffffffffUL;


/*****************************************************************************
 * EHCI0
 ****************************************************************************/
static struct resource kirkwood_ehci_resources[] = {
      {
            .start      = USB_PHYS_BASE,
            .end  = USB_PHYS_BASE + 0x0fff,
            .flags      = IORESOURCE_MEM,
      }, {
            .start      = IRQ_KIRKWOOD_USB,
            .end  = IRQ_KIRKWOOD_USB,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_ehci = {
      .name       = "orion-ehci",
      .id         = 0,
      .dev        = {
            .dma_mask         = &ehci_dmamask,
            .coherent_dma_mask      = 0xffffffff,
            .platform_data          = &kirkwood_ehci_data,
      },
      .resource   = kirkwood_ehci_resources,
      .num_resources    = ARRAY_SIZE(kirkwood_ehci_resources),
};

void __init kirkwood_ehci_init(void)
{
      platform_device_register(&kirkwood_ehci);
}


/*****************************************************************************
 * GE00
 ****************************************************************************/
struct mv643xx_eth_shared_platform_data kirkwood_ge00_shared_data = {
      .dram       = &kirkwood_mbus_dram_info,
};

static struct resource kirkwood_ge00_shared_resources[] = {
      {
            .name = "ge00 base",
            .start      = GE00_PHYS_BASE + 0x2000,
            .end  = GE00_PHYS_BASE + 0x3fff,
            .flags      = IORESOURCE_MEM,
      }, {
            .name = "ge00 err irq",
            .start      = IRQ_KIRKWOOD_GE00_ERR,
            .end  = IRQ_KIRKWOOD_GE00_ERR,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_ge00_shared = {
      .name       = MV643XX_ETH_SHARED_NAME,
      .id         = 0,
      .dev        = {
            .platform_data    = &kirkwood_ge00_shared_data,
      },
      .num_resources    = ARRAY_SIZE(kirkwood_ge00_shared_resources),
      .resource   = kirkwood_ge00_shared_resources,
};

static struct resource kirkwood_ge00_resources[] = {
      {
            .name = "ge00 irq",
            .start      = IRQ_KIRKWOOD_GE00_SUM,
            .end  = IRQ_KIRKWOOD_GE00_SUM,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_ge00 = {
      .name       = MV643XX_ETH_NAME,
      .id         = 0,
      .num_resources    = 1,
      .resource   = kirkwood_ge00_resources,
};

void __init kirkwood_ge00_init(struct mv643xx_eth_platform_data *eth_data)
{
      eth_data->shared = &kirkwood_ge00_shared;
      kirkwood_ge00.dev.platform_data = eth_data;

      platform_device_register(&kirkwood_ge00_shared);
      platform_device_register(&kirkwood_ge00);
}


/*****************************************************************************
 * Ethernet switch
 ****************************************************************************/
static struct resource kirkwood_switch_resources[] = {
      {
            .start      = 0,
            .end  = 0,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_switch_device = {
      .name       = "dsa",
      .id         = 0,
      .num_resources    = 0,
      .resource   = kirkwood_switch_resources,
};

void __init kirkwood_ge00_switch_init(struct dsa_platform_data *d, int irq)
{
      if (irq != NO_IRQ) {
            kirkwood_switch_resources[0].start = irq;
            kirkwood_switch_resources[0].end = irq;
            kirkwood_switch_device.num_resources = 1;
      }

      d->mii_bus = &kirkwood_ge00_shared.dev;
      d->netdev = &kirkwood_ge00.dev;
      kirkwood_switch_device.dev.platform_data = d;

      platform_device_register(&kirkwood_switch_device);
}


/*****************************************************************************
 * SoC RTC
 ****************************************************************************/
static struct resource kirkwood_rtc_resource = {
      .start      = RTC_PHYS_BASE,
      .end  = RTC_PHYS_BASE + SZ_16 - 1,
      .flags      = IORESOURCE_MEM,
};

void __init kirkwood_rtc_init(void)
{
      platform_device_register_simple("rtc-mv", -1, &kirkwood_rtc_resource, 1);
}


/*****************************************************************************
 * SATA
 ****************************************************************************/
static struct resource kirkwood_sata_resources[] = {
      {
            .name = "sata base",
            .start      = SATA_PHYS_BASE,
            .end  = SATA_PHYS_BASE + 0x5000 - 1,
            .flags      = IORESOURCE_MEM,
      }, {
            .name = "sata irq",
            .start      = IRQ_KIRKWOOD_SATA,
            .end  = IRQ_KIRKWOOD_SATA,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_sata = {
      .name       = "sata_mv",
      .id         = 0,
      .dev        = {
            .coherent_dma_mask      = 0xffffffff,
      },
      .num_resources    = ARRAY_SIZE(kirkwood_sata_resources),
      .resource   = kirkwood_sata_resources,
};

void __init kirkwood_sata_init(struct mv_sata_platform_data *sata_data)
{
      sata_data->dram = &kirkwood_mbus_dram_info;
      kirkwood_sata.dev.platform_data = sata_data;
      platform_device_register(&kirkwood_sata);
}


/*****************************************************************************
 * SPI
 ****************************************************************************/
static struct orion_spi_info kirkwood_spi_plat_data = {
};

static struct resource kirkwood_spi_resources[] = {
      {
            .start      = SPI_PHYS_BASE,
            .end  = SPI_PHYS_BASE + SZ_512 - 1,
            .flags      = IORESOURCE_MEM,
      },
};

static struct platform_device kirkwood_spi = {
      .name       = "orion_spi",
      .id         = 0,
      .resource   = kirkwood_spi_resources,
      .dev        = {
            .platform_data    = &kirkwood_spi_plat_data,
      },
      .num_resources    = ARRAY_SIZE(kirkwood_spi_resources),
};

void __init kirkwood_spi_init()
{
      platform_device_register(&kirkwood_spi);
}


/*****************************************************************************
 * UART0
 ****************************************************************************/
static struct plat_serial8250_port kirkwood_uart0_data[] = {
      {
            .mapbase    = UART0_PHYS_BASE,
            .membase    = (char *)UART0_VIRT_BASE,
            .irq        = IRQ_KIRKWOOD_UART_0,
            .flags            = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
            .iotype           = UPIO_MEM,
            .regshift   = 2,
            .uartclk    = 0,
      }, {
      },
};

static struct resource kirkwood_uart0_resources[] = {
      {
            .start            = UART0_PHYS_BASE,
            .end        = UART0_PHYS_BASE + 0xff,
            .flags            = IORESOURCE_MEM,
      }, {
            .start            = IRQ_KIRKWOOD_UART_0,
            .end        = IRQ_KIRKWOOD_UART_0,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_uart0 = {
      .name             = "serial8250",
      .id               = 0,
      .dev              = {
            .platform_data    = kirkwood_uart0_data,
      },
      .resource         = kirkwood_uart0_resources,
      .num_resources          = ARRAY_SIZE(kirkwood_uart0_resources),
};

void __init kirkwood_uart0_init(void)
{
      platform_device_register(&kirkwood_uart0);
}


/*****************************************************************************
 * UART1
 ****************************************************************************/
static struct plat_serial8250_port kirkwood_uart1_data[] = {
      {
            .mapbase    = UART1_PHYS_BASE,
            .membase    = (char *)UART1_VIRT_BASE,
            .irq        = IRQ_KIRKWOOD_UART_1,
            .flags            = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF,
            .iotype           = UPIO_MEM,
            .regshift   = 2,
            .uartclk    = 0,
      }, {
      },
};

static struct resource kirkwood_uart1_resources[] = {
      {
            .start            = UART1_PHYS_BASE,
            .end        = UART1_PHYS_BASE + 0xff,
            .flags            = IORESOURCE_MEM,
      }, {
            .start            = IRQ_KIRKWOOD_UART_1,
            .end        = IRQ_KIRKWOOD_UART_1,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device kirkwood_uart1 = {
      .name             = "serial8250",
      .id               = 1,
      .dev              = {
            .platform_data    = kirkwood_uart1_data,
      },
      .resource         = kirkwood_uart1_resources,
      .num_resources          = ARRAY_SIZE(kirkwood_uart1_resources),
};

void __init kirkwood_uart1_init(void)
{
      platform_device_register(&kirkwood_uart1);
}


/*****************************************************************************
 * XOR
 ****************************************************************************/
static struct mv_xor_platform_shared_data kirkwood_xor_shared_data = {
      .dram       = &kirkwood_mbus_dram_info,
};

static u64 kirkwood_xor_dmamask = DMA_32BIT_MASK;


/*****************************************************************************
 * XOR0
 ****************************************************************************/
static struct resource kirkwood_xor0_shared_resources[] = {
      {
            .name = "xor 0 low",
            .start      = XOR0_PHYS_BASE,
            .end  = XOR0_PHYS_BASE + 0xff,
            .flags      = IORESOURCE_MEM,
      }, {
            .name = "xor 0 high",
            .start      = XOR0_HIGH_PHYS_BASE,
            .end  = XOR0_HIGH_PHYS_BASE + 0xff,
            .flags      = IORESOURCE_MEM,
      },
};

static struct platform_device kirkwood_xor0_shared = {
      .name       = MV_XOR_SHARED_NAME,
      .id         = 0,
      .dev        = {
            .platform_data = &kirkwood_xor_shared_data,
      },
      .num_resources    = ARRAY_SIZE(kirkwood_xor0_shared_resources),
      .resource   = kirkwood_xor0_shared_resources,
};

static struct resource kirkwood_xor00_resources[] = {
      [0] = {
            .start      = IRQ_KIRKWOOD_XOR_00,
            .end  = IRQ_KIRKWOOD_XOR_00,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct mv_xor_platform_data kirkwood_xor00_data = {
      .shared           = &kirkwood_xor0_shared,
      .hw_id            = 0,
      .pool_size  = PAGE_SIZE,
};

static struct platform_device kirkwood_xor00_channel = {
      .name       = MV_XOR_NAME,
      .id         = 0,
      .num_resources    = ARRAY_SIZE(kirkwood_xor00_resources),
      .resource   = kirkwood_xor00_resources,
      .dev        = {
            .dma_mask         = &kirkwood_xor_dmamask,
            .coherent_dma_mask      = DMA_64BIT_MASK,
            .platform_data          = (void *)&kirkwood_xor00_data,
      },
};

static struct resource kirkwood_xor01_resources[] = {
      [0] = {
            .start      = IRQ_KIRKWOOD_XOR_01,
            .end  = IRQ_KIRKWOOD_XOR_01,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct mv_xor_platform_data kirkwood_xor01_data = {
      .shared           = &kirkwood_xor0_shared,
      .hw_id            = 1,
      .pool_size  = PAGE_SIZE,
};

static struct platform_device kirkwood_xor01_channel = {
      .name       = MV_XOR_NAME,
      .id         = 1,
      .num_resources    = ARRAY_SIZE(kirkwood_xor01_resources),
      .resource   = kirkwood_xor01_resources,
      .dev        = {
            .dma_mask         = &kirkwood_xor_dmamask,
            .coherent_dma_mask      = DMA_64BIT_MASK,
            .platform_data          = (void *)&kirkwood_xor01_data,
      },
};

void __init kirkwood_xor0_init(void)
{
      platform_device_register(&kirkwood_xor0_shared);

      /*
       * two engines can't do memset simultaneously, this limitation
       * satisfied by removing memset support from one of the engines.
       */
      dma_cap_set(DMA_MEMCPY, kirkwood_xor00_data.cap_mask);
      dma_cap_set(DMA_XOR, kirkwood_xor00_data.cap_mask);
      platform_device_register(&kirkwood_xor00_channel);

      dma_cap_set(DMA_MEMCPY, kirkwood_xor01_data.cap_mask);
      dma_cap_set(DMA_MEMSET, kirkwood_xor01_data.cap_mask);
      dma_cap_set(DMA_XOR, kirkwood_xor01_data.cap_mask);
      platform_device_register(&kirkwood_xor01_channel);
}


/*****************************************************************************
 * XOR1
 ****************************************************************************/
static struct resource kirkwood_xor1_shared_resources[] = {
      {
            .name = "xor 1 low",
            .start      = XOR1_PHYS_BASE,
            .end  = XOR1_PHYS_BASE + 0xff,
            .flags      = IORESOURCE_MEM,
      }, {
            .name = "xor 1 high",
            .start      = XOR1_HIGH_PHYS_BASE,
            .end  = XOR1_HIGH_PHYS_BASE + 0xff,
            .flags      = IORESOURCE_MEM,
      },
};

static struct platform_device kirkwood_xor1_shared = {
      .name       = MV_XOR_SHARED_NAME,
      .id         = 1,
      .dev        = {
            .platform_data = &kirkwood_xor_shared_data,
      },
      .num_resources    = ARRAY_SIZE(kirkwood_xor1_shared_resources),
      .resource   = kirkwood_xor1_shared_resources,
};

static struct resource kirkwood_xor10_resources[] = {
      [0] = {
            .start      = IRQ_KIRKWOOD_XOR_10,
            .end  = IRQ_KIRKWOOD_XOR_10,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct mv_xor_platform_data kirkwood_xor10_data = {
      .shared           = &kirkwood_xor1_shared,
      .hw_id            = 0,
      .pool_size  = PAGE_SIZE,
};

static struct platform_device kirkwood_xor10_channel = {
      .name       = MV_XOR_NAME,
      .id         = 2,
      .num_resources    = ARRAY_SIZE(kirkwood_xor10_resources),
      .resource   = kirkwood_xor10_resources,
      .dev        = {
            .dma_mask         = &kirkwood_xor_dmamask,
            .coherent_dma_mask      = DMA_64BIT_MASK,
            .platform_data          = (void *)&kirkwood_xor10_data,
      },
};

static struct resource kirkwood_xor11_resources[] = {
      [0] = {
            .start      = IRQ_KIRKWOOD_XOR_11,
            .end  = IRQ_KIRKWOOD_XOR_11,
            .flags      = IORESOURCE_IRQ,
      },
};

static struct mv_xor_platform_data kirkwood_xor11_data = {
      .shared           = &kirkwood_xor1_shared,
      .hw_id            = 1,
      .pool_size  = PAGE_SIZE,
};

static struct platform_device kirkwood_xor11_channel = {
      .name       = MV_XOR_NAME,
      .id         = 3,
      .num_resources    = ARRAY_SIZE(kirkwood_xor11_resources),
      .resource   = kirkwood_xor11_resources,
      .dev        = {
            .dma_mask         = &kirkwood_xor_dmamask,
            .coherent_dma_mask      = DMA_64BIT_MASK,
            .platform_data          = (void *)&kirkwood_xor11_data,
      },
};

void __init kirkwood_xor1_init(void)
{
      platform_device_register(&kirkwood_xor1_shared);

      /*
       * two engines can't do memset simultaneously, this limitation
       * satisfied by removing memset support from one of the engines.
       */
      dma_cap_set(DMA_MEMCPY, kirkwood_xor10_data.cap_mask);
      dma_cap_set(DMA_XOR, kirkwood_xor10_data.cap_mask);
      platform_device_register(&kirkwood_xor10_channel);

      dma_cap_set(DMA_MEMCPY, kirkwood_xor11_data.cap_mask);
      dma_cap_set(DMA_MEMSET, kirkwood_xor11_data.cap_mask);
      dma_cap_set(DMA_XOR, kirkwood_xor11_data.cap_mask);
      platform_device_register(&kirkwood_xor11_channel);
}


/*****************************************************************************
 * Time handling
 ****************************************************************************/
int kirkwood_tclk;

int __init kirkwood_find_tclk(void)
{
      u32 dev, rev;

      kirkwood_pcie_id(&dev, &rev);
      if (dev == MV88F6281_DEV_ID && rev == MV88F6281_REV_A0)
            return 200000000;

      return 166666667;
}

static void kirkwood_timer_init(void)
{
      kirkwood_tclk = kirkwood_find_tclk();
      orion_time_init(IRQ_KIRKWOOD_BRIDGE, kirkwood_tclk);
}

struct sys_timer kirkwood_timer = {
      .init = kirkwood_timer_init,
};


/*****************************************************************************
 * General
 ****************************************************************************/
/*
 * Identify device ID and revision.
 */
static char * __init kirkwood_id(void)
{
      u32 dev, rev;

      kirkwood_pcie_id(&dev, &rev);

      if (dev == MV88F6281_DEV_ID) {
            if (rev == MV88F6281_REV_Z0)
                  return "MV88F6281-Z0";
            else if (rev == MV88F6281_REV_A0)
                  return "MV88F6281-A0";
            else
                  return "MV88F6281-Rev-Unsupported";
      } else if (dev == MV88F6192_DEV_ID) {
            if (rev == MV88F6192_REV_Z0)
                  return "MV88F6192-Z0";
            else if (rev == MV88F6192_REV_A0)
                  return "MV88F6192-A0";
            else
                  return "MV88F6192-Rev-Unsupported";
      } else if (dev == MV88F6180_DEV_ID) {
            if (rev == MV88F6180_REV_A0)
                  return "MV88F6180-Rev-A0";
            else
                  return "MV88F6180-Rev-Unsupported";
      } else {
            return "Device-Unknown";
      }
}

static void __init kirkwood_l2_init(void)
{
#ifdef CONFIG_CACHE_FEROCEON_L2_WRITETHROUGH
      writel(readl(L2_CONFIG_REG) | L2_WRITETHROUGH, L2_CONFIG_REG);
      feroceon_l2_init(1);
#else
      writel(readl(L2_CONFIG_REG) & ~L2_WRITETHROUGH, L2_CONFIG_REG);
      feroceon_l2_init(0);
#endif
}

void __init kirkwood_init(void)
{
      printk(KERN_INFO "Kirkwood: %s, TCLK=%d.\n",
            kirkwood_id(), kirkwood_tclk);
      kirkwood_ge00_shared_data.t_clk = kirkwood_tclk;
      kirkwood_spi_plat_data.tclk = kirkwood_tclk;
      kirkwood_uart0_data[0].uartclk = kirkwood_tclk;
      kirkwood_uart1_data[0].uartclk = kirkwood_tclk;

      kirkwood_setup_cpu_mbus();

#ifdef CONFIG_CACHE_FEROCEON_L2
      kirkwood_l2_init();
#endif
}

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