| TsiChung Liew | 523d963 | 2008-03-25 15:41:15 -0500 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * (C) Copyright 2000-2003 |
| 4 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 5 | * |
| 6 | * Copyright (C) 2004-2008 Freescale Semiconductor, Inc. |
| 7 | * TsiChung Liew (Tsi-Chung.Liew@freescale.com) |
| 8 | * |
| 9 | * See file CREDITS for list of people who contributed to this |
| 10 | * project. |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or |
| 13 | * modify it under the terms of the GNU General Public License as |
| 14 | * published by the Free Software Foundation; either version 2 of |
| 15 | * the License, or (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 25 | * MA 02111-1307 USA |
| 26 | */ |
| 27 | |
| 28 | #include <common.h> |
| 29 | #include <spi.h> |
| 30 | |
| 31 | #if defined(CONFIG_CF_DSPI) |
| 32 | #include <asm/immap.h> |
| 33 | void dspi_init(void) |
| 34 | { |
| 35 | volatile gpio_t *gpio = (gpio_t *) MMAP_GPIO; |
| 36 | volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| 37 | |
| 38 | gpio->par_dspi = GPIO_PAR_DSPI_PCS5_PCS5 | GPIO_PAR_DSPI_PCS2_PCS2 | |
| 39 | GPIO_PAR_DSPI_PCS1_PCS1 | GPIO_PAR_DSPI_PCS0_PCS0 | |
| 40 | GPIO_PAR_DSPI_SIN_SIN | GPIO_PAR_DSPI_SOUT_SOUT | |
| 41 | GPIO_PAR_DSPI_SCK_SCK; |
| 42 | |
| 43 | dspi->dmcr = DSPI_DMCR_MSTR | DSPI_DMCR_CSIS7 | DSPI_DMCR_CSIS6 | |
| 44 | DSPI_DMCR_CSIS5 | DSPI_DMCR_CSIS4 | DSPI_DMCR_CSIS3 | |
| 45 | DSPI_DMCR_CSIS2 | DSPI_DMCR_CSIS1 | DSPI_DMCR_CSIS0 | |
| 46 | DSPI_DMCR_CRXF | DSPI_DMCR_CTXF; |
| 47 | |
| 48 | dspi->dctar0 = DSPI_DCTAR_TRSZ(7) | DSPI_DCTAR_CPOL | DSPI_DCTAR_CPHA | |
| 49 | DSPI_DCTAR_PCSSCK_1CLK | DSPI_DCTAR_PASC(0) | |
| 50 | DSPI_DCTAR_PDT(0) | DSPI_DCTAR_CSSCK(0) | |
| 51 | DSPI_DCTAR_ASC(0) | DSPI_DCTAR_PBR(0) | |
| 52 | DSPI_DCTAR_DT(1) | DSPI_DCTAR_BR(1); |
| 53 | } |
| 54 | |
| 55 | void dspi_tx(int chipsel, u8 attrib, u16 data) |
| 56 | { |
| 57 | volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| 58 | |
| 59 | while ((dspi->dsr & 0x0000F000) >= 4) ; |
| 60 | |
| 61 | dspi->dtfr = (attrib << 24) | ((1 << chipsel) << 16) | data; |
| 62 | } |
| 63 | |
| 64 | u16 dspi_rx(void) |
| 65 | { |
| 66 | volatile dspi_t *dspi = (dspi_t *) MMAP_DSPI; |
| 67 | |
| 68 | while ((dspi->dsr & 0x000000F0) == 0) ; |
| 69 | |
| 70 | return (dspi->drfr & 0xFFFF); |
| 71 | } |
| 72 | |
| 73 | #endif /* CONFIG_HARD_SPI */ |