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config.c

/***************************************************************************/

/*
 *    linux/arch/m68knommu/platform/528x/config.c
 *
 *    Sub-architcture dependant initialization code for the Motorola
 *    5280 and 5282 CPUs.
 *
 *    Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
 *    Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>

#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
#endif

/***************************************************************************/

void coldfire_reset(void);
static void coldfire_qspi_cs_control(u8 cs, u8 command);

/***************************************************************************/

#if defined(CONFIG_SPI)

#if defined(CONFIG_WILDFIRE)
#define SPI_NUM_CHIPSELECTS   0x02
#define SPI_PAR_VAL           0x07  /* Enable DIN, DOUT, CLK */
#define SPI_CS_MASK           0x18

#define FLASH_BLOCKSIZE       (1024*64)
#define FLASH_NUMBLOCKS       16
#define FLASH_TYPE            "m25p80"

#define M25P80_CS       0
#define MMC_CS                1

#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition stm25p_partitions[] = {
      /* sflash */
      [0] = {
            .name = "stm25p80",
            .offset = 0x00000000,
            .size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS,
            .mask_flags = 0
      }
};

#endif

#elif defined(CONFIG_WILDFIREMOD)

#define SPI_NUM_CHIPSELECTS   0x08
#define SPI_PAR_VAL           0x07  /* Enable DIN, DOUT, CLK */
#define SPI_CS_MASK           0x78

#define FLASH_BLOCKSIZE       (1024*64)
#define FLASH_NUMBLOCKS       64
#define FLASH_TYPE            "m25p32"
/* Reserve 1M for the kernel parition */
#define FLASH_KERNEL_SIZE   (1024 * 1024)

#define M25P80_CS       5
#define MMC_CS                6

#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition stm25p_partitions[] = {
      /* sflash */
      [0] = {
            .name = "kernel",
            .offset = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS - FLASH_KERNEL_SIZE,
            .size = FLASH_KERNEL_SIZE,
            .mask_flags = 0
      },
      [1] = {
            .name = "image",
            .offset = 0x00000000,
            .size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS - FLASH_KERNEL_SIZE,
            .mask_flags = 0
      },
      [2] = {
            .name = "all",
            .offset = 0x00000000,
            .size = FLASH_BLOCKSIZE * FLASH_NUMBLOCKS,
            .mask_flags = 0
      }
};
#endif

#else
#define SPI_NUM_CHIPSELECTS   0x04
#define SPI_PAR_VAL           0x7F  /* Enable DIN, DOUT, CLK, CS0 - CS4 */
#endif

#ifdef MMC_CS
static struct coldfire_spi_chip flash_chip_info = {
      .mode = SPI_MODE_0,
      .bits_per_word = 16,
      .del_cs_to_clk = 17,
      .del_after_trans = 1,
      .void_write_data = 0
};

static struct coldfire_spi_chip mmc_chip_info = {
      .mode = SPI_MODE_0,
      .bits_per_word = 16,
      .del_cs_to_clk = 17,
      .del_after_trans = 1,
      .void_write_data = 0xFFFF
};
#endif

#ifdef M25P80_CS
static struct flash_platform_data stm25p80_platform_data = {
      .name = "ST M25P80 SPI Flash chip",
#ifdef CONFIG_MTD_PARTITIONS
      .parts = stm25p_partitions,
      .nr_parts = sizeof(stm25p_partitions) / sizeof(*stm25p_partitions),
#endif
      .type = FLASH_TYPE
};
#endif

static struct spi_board_info spi_board_info[] __initdata = {
#ifdef M25P80_CS
      {
            .modalias = "m25p80",
            .max_speed_hz = 16000000,
            .bus_num = 1,
            .chip_select = M25P80_CS,
            .platform_data = &stm25p80_platform_data,
            .controller_data = &flash_chip_info
      },
#endif
#ifdef MMC_CS
      {
            .modalias = "mmc_spi",
            .max_speed_hz = 16000000,
            .bus_num = 1,
            .chip_select = MMC_CS,
            .controller_data = &mmc_chip_info
      }
#endif
};

static struct coldfire_spi_master coldfire_master_info = {
      .bus_num = 1,
      .num_chipselect = SPI_NUM_CHIPSELECTS,
      .irq_source = MCF5282_QSPI_IRQ_SOURCE,
      .irq_vector = MCF5282_QSPI_IRQ_VECTOR,
      .irq_mask = ((0x01 << MCF5282_QSPI_IRQ_SOURCE) | 0x01),
      .irq_lp = 0x2B,  /* Level 5 and Priority 3 */
      .par_val = SPI_PAR_VAL,
      .cs_control = coldfire_qspi_cs_control,
};

static struct resource coldfire_spi_resources[] = {
      [0] = {
            .name = "qspi-par",
            .start = MCF5282_QSPI_PAR,
            .end = MCF5282_QSPI_PAR,
            .flags = IORESOURCE_MEM
      },

      [1] = {
            .name = "qspi-module",
            .start = MCF5282_QSPI_QMR,
            .end = MCF5282_QSPI_QMR + 0x18,
            .flags = IORESOURCE_MEM
      },

      [2] = {
            .name = "qspi-int-level",
            .start = MCF5282_INTC0 + MCFINTC_ICR0 + MCF5282_QSPI_IRQ_SOURCE,
            .end = MCF5282_INTC0 + MCFINTC_ICR0 + MCF5282_QSPI_IRQ_SOURCE,
            .flags = IORESOURCE_MEM
      },

      [3] = {
            .name = "qspi-int-mask",
            .start = MCF5282_INTC0 + MCFINTC_IMRL,
            .end = MCF5282_INTC0 + MCFINTC_IMRL,
            .flags = IORESOURCE_MEM
      }
};

static struct platform_device coldfire_spi = {
      .name = "spi_coldfire",
      .id = -1,
      .resource = coldfire_spi_resources,
      .num_resources = ARRAY_SIZE(coldfire_spi_resources),
      .dev = {
            .platform_data = &coldfire_master_info,
      }
};

static void coldfire_qspi_cs_control(u8 cs, u8 command)
{
      u8 cs_bit = ((0x01 << cs) << 3) & SPI_CS_MASK;

#if defined(CONFIG_WILDFIRE)
      u8 cs_mask = ~(((0x01 << cs) << 3) & SPI_CS_MASK);
#endif
#if defined(CONFIG_WILDFIREMOD)
      u8 cs_mask = (cs << 3) & SPI_CS_MASK;
#endif

      /*
       * Don't do anything if the chip select is not
       * one of the port qs pins.
       */
      if (command & QSPI_CS_INIT) {
#if defined(CONFIG_WILDFIRE)
            MCF5282_GPIO_DDRQS  |= cs_bit;
            MCF5282_GPIO_PQSPAR &= ~cs_bit;
#endif

#if defined(CONFIG_WILDFIREMOD)
            MCF5282_GPIO_DDRQS  |= SPI_CS_MASK;
            MCF5282_GPIO_PQSPAR &= ~SPI_CS_MASK;
#endif
      }

      if (command & QSPI_CS_ASSERT) {
            MCF5282_GPIO_PORTQS &= ~SPI_CS_MASK;
            MCF5282_GPIO_PORTQS |= cs_mask;
      } else if (command & QSPI_CS_DROP) {
            MCF5282_GPIO_PORTQS |= SPI_CS_MASK;
      }
}

static int __init spi_dev_init(void)
{
      int retval;

      retval = platform_device_register(&coldfire_spi);
      if (retval < 0)
            return retval;

      if (ARRAY_SIZE(spi_board_info))
            retval = spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));

      return retval;
}

#endif /* CONFIG_SPI */

/***************************************************************************/

static struct mcf_platform_uart m528x_uart_platform[] = {
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE1,
            .irq        = MCFINT_VECBASE + MCFINT_UART0,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE2,
            .irq        = MCFINT_VECBASE + MCFINT_UART0 + 1,
      },
      {
            .mapbase    = MCF_MBAR + MCFUART_BASE3,
            .irq        = MCFINT_VECBASE + MCFINT_UART0 + 2,
      },
      { },
};

static struct platform_device m528x_uart = {
      .name             = "mcfuart",
      .id               = 0,
      .dev.platform_data      = m528x_uart_platform,
};

static struct platform_device *m528x_devices[] __initdata = {
      &m528x_uart,
};

/***************************************************************************/

#define     INTC0 (MCF_MBAR + MCFICM_INTC0)

static void __init m528x_uart_init_line(int line, int irq)
{
      u8 port;
      u32 imr;

      if ((line < 0) || (line > 2))
            return;

      /* level 6, line based priority */
      writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);

      imr = readl(INTC0 + MCFINTC_IMRL);
      imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
      writel(imr, INTC0 + MCFINTC_IMRL);

      /* make sure PUAPAR is set for UART0 and UART1 */
      if (line < 2) {
            port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
            port |= (0x03 << (line * 2));
            writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
      }
}

static void __init m528x_uarts_init(void)
{
      const int nrlines = ARRAY_SIZE(m528x_uart_platform);
      int line;

      for (line = 0; (line < nrlines); line++)
            m528x_uart_init_line(line, m528x_uart_platform[line].irq);
}

/***************************************************************************/

void mcf_disableall(void)
{
      *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
      *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
}

/***************************************************************************/

void mcf_autovector(unsigned int vec)
{
      /* Everything is auto-vectored on the 5272 */
}

/***************************************************************************/

#ifdef CONFIG_WILDFIRE
void wildfire_halt(void)
{
      writeb(0, 0x30000007);
      writeb(0x2, 0x30000007);
}
#endif

#ifdef CONFIG_WILDFIREMOD
void wildfiremod_halt(void)
{
      printk(KERN_INFO "WildFireMod hibernating...\n");

      /* Set portE.5 to Digital IO */
      MCF5282_GPIO_PEPAR &= ~(1 << (5 * 2));

      /* Make portE.5 an output */
      MCF5282_GPIO_DDRE |= (1 << 5);

      /* Now toggle portE.5 from low to high */
      MCF5282_GPIO_PORTE &= ~(1 << 5);
      MCF5282_GPIO_PORTE |= (1 << 5);

      printk(KERN_EMERG "Failed to hibernate. Halting!\n");
}
#endif

void __init config_BSP(char *commandp, int size)
{
      mcf_disableall();

#ifdef CONFIG_WILDFIRE
      mach_halt = wildfire_halt;
#endif
#ifdef CONFIG_WILDFIREMOD
      mach_halt = wildfiremod_halt;
#endif
}

/***************************************************************************/

static int __init init_BSP(void)
{
      m528x_uarts_init();
      platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
      return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/

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