| /* |
| * |
| * (C) Copyright 2000-2003 |
| * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| * |
| * Copyright (C) 2004-2008 Freescale Semiconductor, Inc. |
| * TsiChung Liew (Tsi-Chung.Liew@freescale.com) |
| * |
| * See file CREDITS for list of people who contributed to this |
| * project. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <common.h> |
| #include <spi.h> |
| |
| #if defined(CONFIG_CF_DSPI) |
| #include <asm/immap.h> |
| void dspi_init(void) |
| { |
| volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; |
| volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| |
| gpio->par_dspi = GPIO_PAR_DSPI_PCS5_PCS5 | GPIO_PAR_DSPI_PCS2_PCS2 | |
| GPIO_PAR_DSPI_PCS1_PCS1 | GPIO_PAR_DSPI_PCS0_PCS0 | |
| GPIO_PAR_DSPI_SIN_SIN | GPIO_PAR_DSPI_SOUT_SOUT | |
| GPIO_PAR_DSPI_SCK_SCK; |
| |
| dspi->dmcr = DSPI_DMCR_MSTR | DSPI_DMCR_CSIS7 | DSPI_DMCR_CSIS6 | |
| DSPI_DMCR_CSIS5 | DSPI_DMCR_CSIS4 | DSPI_DMCR_CSIS3 | |
| DSPI_DMCR_CSIS2 | DSPI_DMCR_CSIS1 | DSPI_DMCR_CSIS0 | |
| DSPI_DMCR_CRXF | DSPI_DMCR_CTXF; |
| |
| dspi->dctar0 = DSPI_DCTAR_TRSZ(7) | DSPI_DCTAR_CPOL | DSPI_DCTAR_CPHA | |
| DSPI_DCTAR_PCSSCK_1CLK | DSPI_DCTAR_PASC(0) | |
| DSPI_DCTAR_PDT(0) | DSPI_DCTAR_CSSCK(0) | |
| DSPI_DCTAR_ASC(0) | DSPI_DCTAR_PBR(0) | |
| DSPI_DCTAR_DT(1) | DSPI_DCTAR_BR(1); |
| } |
| |
| void dspi_tx(int chipsel, u8 attrib, u16 data) |
| { |
| volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| |
| while ((dspi->dsr & 0x0000F000) >= 4) ; |
| |
| dspi->dtfr = (attrib << 24) | ((1 << chipsel) << 16) | data; |
| } |
| |
| u16 dspi_rx(void) |
| { |
| volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| |
| while ((dspi->dsr & 0x000000F0) == 0) ; |
| |
| return (dspi->drfr & 0xFFFF); |
| } |
| |
| #endif /* CONFIG_HARD_SPI */ |