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//=============================================================================
//
//      hal_diag.c
//
//      HAL diagnostic output code
//
//=============================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####                                            
// -------------------------------------------                              
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//
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// version.                                                                 
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// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License    
// for more details.                                                        
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// along with eCos; if not, write to the Free Software Foundation, Inc.,    
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//
// As a special exception, if other files instantiate templates or use      
// macros or inline functions from this file, or you compile this file      
// and link it with other works to produce a work based on this file,       
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// General Public License v2.                                               
//
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// on this file might be covered by the GNU General Public License.         
// -------------------------------------------                              
// ####ECOSGPLCOPYRIGHTEND####                                              
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):    michael anburaj <michaelanburaj@hotmail.com>
// Contributors: michael anburaj <michaelanburaj@hotmail.com>
// Date:         2003-08-01
// Purpose:      HAL diagnostic output
// Description:  Implementations of HAL diagnostic output support.
//
//####DESCRIPTIONEND####
//
//=============================================================================
 
#include <pkgconf/hal.h>
#include CYGBLD_HAL_VARIANT_H           // Variant specific configuration
#include CYGBLD_HAL_PLATFORM_H          // Platform specific configuration
 
#include <cyg/infra/cyg_type.h>         // base types
#include <cyg/infra/cyg_trac.h>         // tracing macros
#include <cyg/infra/cyg_ass.h>          // assertion macros
 
#include <cyg/hal/hal_arch.h>           // basic machine info
#include <cyg/hal/hal_intr.h>           // interrupt macros
#include <cyg/hal/hal_io.h>             // IO macros
#include <cyg/hal/hal_diag.h>
#include <cyg/hal/drv_api.h>
#include <cyg/hal/hal_if.h>             // interface API
#include <cyg/hal/hal_misc.h>           // Helper functions
#include <cyg/hal/s3c2410x.h>           // platform definitions
 
//-----------------------------------------------------------------------------
typedef struct {
    cyg_uint32 base;
    cyg_int32 msec_timeout;
    int isr_vector;
} channel_data_t;
 
static channel_data_t smdk_ser_channels[2] = {
    {(cyg_uint32)ULCON0, 1000, CYGNUM_HAL_INTERRUPT_UART0},
    {(cyg_uint32)ULCON1, 1000, CYGNUM_HAL_INTERRUPT_UART1}
};
 
 
#define __READ_UINT32( _register_ ) *((volatile CYG_WORD32 *)(_register_))
 
 
//-----------------------------------------------------------------------------
 
static void
cyg_hal_plf_serial_init_channel(void* __ch_data)
{
    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;
 
    //UART FIFO control register
    HAL_WRITE_UINT32(base+OFS_UFCON, (3<<6) | (3<<4) | (1<<2) | (1<<1) | (1<<0));
 
    //UART modem control register
    HAL_WRITE_UINT32(base+OFS_UMCON, 0);
 
    //UART line control register: Normal,No parity,1 stop,8 bits
    HAL_WRITE_UINT32(base+OFS_ULCON, 0x3);
 
    //UART control register
    HAL_WRITE_UINT32(base+OFS_UCON, 0x245);
 
    //UART baud divider register
    HAL_WRITE_UINT32(base+OFS_UBRDIV,  (cyg_uint32)((FCLK/4)/16./CYGNUM_HAL_VIRTUAL_VECTOR_CONSOLE_CHANNEL_BAUD+0.5) -1);
}
 
void
cyg_hal_plf_serial_putc(void* __ch_data, char c)
{
    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;
    cyg_uint32 status;
    CYGARC_HAL_SAVE_GP();
 
    // Wait for Tx FIFO not full
    do
    {
        HAL_READ_UINT32(base+OFS_UFSTAT, status);
    }
    while (status & 0x200) ;
 
    //UART TX data register
    HAL_WRITE_UINT8(base+OFS_UTXH, c);
 
    CYGARC_HAL_RESTORE_GP();
}
 
static cyg_bool
cyg_hal_plf_serial_getc_nonblock(void* __ch_data, cyg_uint8* ch)
{
    cyg_uint32 base = ((channel_data_t*)__ch_data)->base;
    cyg_uint32 status;
 
    HAL_READ_UINT32(base+OFS_UFSTAT, status);
    if (status & 0x0f)
    {
        HAL_READ_UINT8(base+OFS_URXH, *ch);
        return true;
    }
 
    return false;
}
 
cyg_uint8
cyg_hal_plf_serial_getc(void* __ch_data)
{
    cyg_uint8 ch;
    CYGARC_HAL_SAVE_GP();
 
    while(!cyg_hal_plf_serial_getc_nonblock(__ch_data, &ch));
 
    CYGARC_HAL_RESTORE_GP();
    return ch;
}
 
static void
cyg_hal_plf_serial_write(void* __ch_data, const cyg_uint8* __buf, 
                         cyg_uint32 __len)
{
    CYGARC_HAL_SAVE_GP();
 
    while(__len-- > 0)
        cyg_hal_plf_serial_putc(__ch_data, *__buf++);
 
    CYGARC_HAL_RESTORE_GP();
}
 
static void
cyg_hal_plf_serial_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)
{
    CYGARC_HAL_SAVE_GP();
 
    while(__len-- > 0)
        *__buf++ = cyg_hal_plf_serial_getc(__ch_data);
 
    CYGARC_HAL_RESTORE_GP();
}
 
cyg_bool
cyg_hal_plf_serial_getc_timeout(void* __ch_data, cyg_uint8* ch)
{
    int delay_count;
    channel_data_t* chan = (channel_data_t*)__ch_data;
    cyg_bool res;
    CYGARC_HAL_SAVE_GP();
 
    delay_count = chan->msec_timeout * 10; // delay in .1 ms steps
 
    for(;;) {
        res = cyg_hal_plf_serial_getc_nonblock(__ch_data, ch);
        if (res || 0 == delay_count--)
            break;
 
        CYGACC_CALL_IF_DELAY_US(100);
    }
 
    CYGARC_HAL_RESTORE_GP();
    return res;
}
 
static int
cyg_hal_plf_serial_control(void *__ch_data, __comm_control_cmd_t __func, ...)
{
    static int irq_state = 0;
    channel_data_t* chan = (channel_data_t*)__ch_data;
    int ret = 0;
    CYGARC_HAL_SAVE_GP();
 
    switch (__func) {
    case __COMMCTL_IRQ_ENABLE:
        irq_state = 1;
        HAL_INTERRUPT_UNMASK(chan->isr_vector);
        break;
    case __COMMCTL_IRQ_DISABLE:
        ret = irq_state;
        irq_state = 0;
        HAL_INTERRUPT_MASK(chan->isr_vector);
        break;
    case __COMMCTL_DBG_ISR_VECTOR:
        ret = chan->isr_vector;
        break;
    case __COMMCTL_SET_TIMEOUT:
    {
        va_list ap;
 
        va_start(ap, __func);
 
        ret = chan->msec_timeout;
        chan->msec_timeout = va_arg(ap, cyg_uint32);
 
        va_end(ap);
    }        
    default:
        break;
    }
    CYGARC_HAL_RESTORE_GP();
    return ret;
}
 
static int
cyg_hal_plf_serial_isr(void *__ch_data, int* __ctrlc, 
                       CYG_ADDRWORD __vector, CYG_ADDRWORD __data)
{
    int res = 0;
    channel_data_t* chan = (channel_data_t*)__ch_data;
    char c;
    cyg_uint32 lsr;
    CYGARC_HAL_SAVE_GP();
 
    cyg_drv_interrupt_acknowledge(chan->isr_vector);
 
    *__ctrlc = 0;
    HAL_READ_UINT32(chan->base+OFS_UFSTAT, lsr);
    if (lsr & 0x0f)
    {
        HAL_READ_UINT8(chan->base+OFS_URXH, c);
        if( cyg_hal_is_break( &c , 1 ) )
            *__ctrlc = 1;
 
        res = CYG_ISR_HANDLED;
    }
 
    CYGARC_HAL_RESTORE_GP();
    return res;
}
 
static void
cyg_hal_plf_serial_init(void)
{
    hal_virtual_comm_table_t* comm;
    int cur = CYGACC_CALL_IF_SET_CONSOLE_COMM(CYGNUM_CALL_IF_SET_COMM_ID_QUERY_CURRENT);
 
    // Disable interrupts.
    HAL_INTERRUPT_MASK(smdk_ser_channels[0].isr_vector);
    HAL_INTERRUPT_MASK(smdk_ser_channels[1].isr_vector);
 
    //Unmask UART0/1 RX interrupt
    HAL_WRITE_UINT32(INTSUBMSK, __READ_UINT32(INTSUBMSK) & ~(BIT_SUB_RXD0|BIT_SUB_RXD1));
 
    // Init channels
    cyg_hal_plf_serial_init_channel(&smdk_ser_channels[0]);
    cyg_hal_plf_serial_init_channel(&smdk_ser_channels[1]);
 
    // Setup procs in the vector table
 
    // Set channel 0
    CYGACC_CALL_IF_SET_CONSOLE_COMM(0);
    comm = CYGACC_CALL_IF_CONSOLE_PROCS();
    CYGACC_COMM_IF_CH_DATA_SET(*comm, &smdk_ser_channels[0]);
    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
    CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
    CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);
 
    // Set channel 1
    CYGACC_CALL_IF_SET_CONSOLE_COMM(1);
    comm = CYGACC_CALL_IF_CONSOLE_PROCS();
    CYGACC_COMM_IF_CH_DATA_SET(*comm, &smdk_ser_channels[1]);
    CYGACC_COMM_IF_WRITE_SET(*comm, cyg_hal_plf_serial_write);
    CYGACC_COMM_IF_READ_SET(*comm, cyg_hal_plf_serial_read);
    CYGACC_COMM_IF_PUTC_SET(*comm, cyg_hal_plf_serial_putc);
    CYGACC_COMM_IF_GETC_SET(*comm, cyg_hal_plf_serial_getc);
    CYGACC_COMM_IF_CONTROL_SET(*comm, cyg_hal_plf_serial_control);
    CYGACC_COMM_IF_DBG_ISR_SET(*comm, cyg_hal_plf_serial_isr);
    CYGACC_COMM_IF_GETC_TIMEOUT_SET(*comm, cyg_hal_plf_serial_getc_timeout);
 
    // Restore original console
    CYGACC_CALL_IF_SET_CONSOLE_COMM(cur);
}
 
void
cyg_hal_plf_comms_init(void)
{
    static int initialized = 0;
 
    if (initialized)
        return;
 
    initialized = 1;
 
    cyg_hal_plf_serial_init();
}
 
//-----------------------------------------------------------------------------
// End of hal_diag.c