diff options
Diffstat (limited to 'openpcd/firmware/src/rc632.c')
| -rw-r--r-- | openpcd/firmware/src/rc632.c | 61 |
1 files changed, 53 insertions, 8 deletions
diff --git a/openpcd/firmware/src/rc632.c b/openpcd/firmware/src/rc632.c index c8aa093..b1e5a3c 100644 --- a/openpcd/firmware/src/rc632.c +++ b/openpcd/firmware/src/rc632.c @@ -11,6 +11,10 @@ #include "openpcd.h" #include "fifo.h" #include "dbgu.h" +#include "pcd_enumerate.h" + +#define SPI_DEBUG_LOOPBACK +#define SPI_USES_DMA static AT91PS_SPI pSPI = AT91C_BASE_SPI; @@ -19,18 +23,45 @@ static void spi_irq(void) { u_int32_t status = pSPI->SPI_SR; - DEBUGP("spi_irq: 0x%08x", status); + DEBUGP("spi_irq: 0x%08x ", status); AT91F_AIC_ClearIt(AT91C_BASE_AIC, AT91C_ID_SPI); if (status & AT91C_SPI_OVRES) - DEBUGP("Overrun detected "); + DEBUGP("Overrun "); if (status & AT91C_SPI_MODF) - DEBUGP("Mode Fault detected "); + DEBUGP("ModeFault "); + if (status & AT91C_SPI_ENDRX) { + pSPI->SPI_IDR = AT91C_SPI_ENDRX; + DEBUGP("ENDRX "); + } + if (status & AT91C_SPI_ENDTX) { + pSPI->SPI_IDR = AT91C_SPI_ENDTX; + DEBUGP("ENDTX "); + } DEBUGP("\r\n"); } +#ifdef SPI_USES_DMA +int spi_transceive(const u_int8_t *tx_data, u_int16_t tx_len, + u_int8_t *rx_data, u_int16_t *rx_len) +{ + DEBUGP("Starting DMA Xfer: "); + AT91F_SPI_ReceiveFrame(pSPI, rx_data, *rx_len, NULL, 0); + AT91F_SPI_SendFrame(pSPI, tx_data, tx_len, NULL, 0); + AT91F_PDC_EnableRx(AT91C_BASE_PDC_SPI); + AT91F_PDC_EnableTx(AT91C_BASE_PDC_SPI); + pSPI->SPI_IER = AT91C_SPI_ENDTX|AT91C_SPI_ENDRX; + AT91F_SPI_Enable(pSPI); + + while (!(pSPI->SPI_SR & (AT91C_SPI_ENDRX|AT91C_SPI_ENDTX))) ; + + DEBUGPCR("DMA Xfer finished"); + + return 0; +} +#else /* stupid polling transceiver routine */ int spi_transceive(const u_int8_t *tx_data, u_int16_t tx_len, u_int8_t *rx_data, u_int16_t *rx_len) @@ -77,6 +108,7 @@ int spi_transceive(const u_int8_t *tx_data, u_int16_t tx_len, return 0; } +#endif /* static buffers used by routines below */ static u_int8_t spi_outbuf[64+1]; @@ -209,16 +241,18 @@ static void rc632_irq(void) irq_opcdh.val = cause; - AT91F_UDP_Write(1, &irq_opcdh, sizeof(irq_opcdh)); + AT91F_UDP_Write(1, (u_int8_t *) &irq_opcdh, sizeof(irq_opcdh)); DEBUGP("\n"); } void rc632_power(u_int8_t up) { if (up) - AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPCD_RC632_RESET); + AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, + OPENPCD_PIO_RC632_RESET); else - AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPCD_RC632_RESET); + AT91F_PIO_SetOutput(AT91C_BASE_PIOA, + OPENPCD_PIO_RC632_RESET); } void rc632_reset(void) @@ -251,8 +285,17 @@ void rc632_init(void) OPENPCD_IRQ_PRIO_SPI, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, &spi_irq); AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SPI); + AT91F_SPI_EnableIt(pSPI, AT91C_SPI_MODF|AT91C_SPI_OVRES); +#ifdef SPI_USES_DMA + AT91F_SPI_EnableIt(pSPI, AT91C_SPI_ENDRX|AT91C_SPI_ENDTX); +#endif + +#ifdef SPI_DEBUG_LOOPBACK + AT91F_SPI_CfgMode(pSPI, AT91C_SPI_MSTR|AT91C_SPI_PS_FIXED|AT91C_SPI_LLB); +#else AT91F_SPI_CfgMode(pSPI, AT91C_SPI_MSTR|AT91C_SPI_PS_FIXED); +#endif /* CPOL = 0, NCPHA = 1, CSAAT = 0, BITS = 0000, SCBR = 10 (4.8MHz), * DLYBS = 0, DLYBCT = 0 */ //AT91F_SPI_CfgCs(pSPI, 0, AT91C_SPI_BITS_8|AT91C_SPI_NCPHA|(10<<8)); @@ -261,12 +304,14 @@ void rc632_init(void) //AT91F_SPI_Reset(pSPI); /* Register rc632_irq */ - AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, OPENPCD_RC632_IRQ, + AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, OPENPCD_IRQ_RC632, OPENPCD_IRQ_PRIO_RC632, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, &rc632_irq); AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_IRQ1); - AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPCD_RC632_RESET); + AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPCD_PIO_RC632_RESET); + AT91F_PIO_CfgOutput(AT91C_BASE_PIOA, OPENPCD_PIO_MFIN); + AT91F_PIO_CfgInput(AT91C_BASE_PIOA, OPENPCD_PIO_MFOUT); /* initialize static part of openpcd_hdr for USB IRQ reporting */ irq_opcdh.cmd = OPENPCD_CMD_IRQ; |