Subversion Repositories mips_enhanced

/*

 * Simple loopback test for SPIMCTRL

 *

 * Copyright (c) 2008 Gaisler Research AB

 *

 * When running this test all core inputs must be

 * pulled HIGH.

 *

 */

#include "testmod.h"

/* Register fields */

/* Control register */

#define SPIM_CSN  (1 << 3)

#define SPIM_EAS  (1 << 2)

#define SPIM_IEN  (1 << 1)

#define SPIM_USRC (1 << 0)

/* Status register */

#define SPIM_TO   (1 << 4)

#define SPIM_ERR  (1 << 3)

#define SPIM_INIT (1 << 2)

#define SPIM_BUSY (1 << 1)

#define SPIM_DONE (1 << 0)

struct spimctrlregs {

  volatile unsigned int conf;

  volatile unsigned int ctrl;

  volatile unsigned int stat;

  volatile unsigned int rx;

  volatile unsigned int tx;

};

/*

 * spimctrl_test(unsigned int addr)

 *

 * Shifts out 0x5A and verifies that the received data is

 * 0xFF. This test application requires that the core is

 * initialized.

 *

 */

int spimctrl_test(unsigned int addr)

{

  struct spimctrlregs *regs;

  report_device(0x01045000);

  regs = (struct spimctrlregs*)addr;

  report_subtest(1);

  /* Verify that core is initialized and that the other bits have sensible values */

  if (regs->stat & SPIM_TO)

     fail(0);

  if (regs->stat & SPIM_ERR)

     fail(1);

  if (!(regs->stat & SPIM_INIT))

     fail(2);

  if (regs->stat & SPIM_BUSY)

     fail(3);

  if (regs->stat & SPIM_DONE)

     fail(4);

  if (!(regs->ctrl & SPIM_CSN))

     fail(5);

  if (regs->ctrl & SPIM_EAS)

     fail(6);

  if (regs->ctrl & SPIM_IEN)

     fail(7);

  if (regs->ctrl & SPIM_USRC)

     fail(8);

  report_subtest(2);

  /* Transfer one byte */

  regs->ctrl = SPIM_USRC;

  if (regs->ctrl != SPIM_USRC)

     fail(0);

  regs->tx = 0x5A;

  while (!(regs->stat & (SPIM_DONE | SPIM_ERR)))

     ;

  if (regs->stat & SPIM_ERR)

     fail(1);

  regs->stat = SPIM_DONE;

  if (regs->stat != SPIM_INIT)

     fail(2);

  if (regs->rx != 0xFF)

     fail(3);

  regs->ctrl = 0;

  if (regs->ctrl != SPIM_CSN)

     fail(4);

  return 0;

}