1 /* 2 * include/linux/spi/mxs-spi.h 3 * 4 * Freescale i.MX233/i.MX28 SPI controller register definition 5 * 6 * Copyright 2008 Embedded Alley Solutions, Inc. 7 * Copyright 2009-2011 Freescale Semiconductor, Inc. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 */ 19 20 #ifndef __LINUX_SPI_MXS_SPI_H__ 21 #define __LINUX_SPI_MXS_SPI_H__ 22 23 #include <linux/dmaengine.h> 24 25 #define ssp_is_old(host) ((host)->devid == IMX23_SSP) 26 27 /* SSP registers */ 28 #define HW_SSP_CTRL0 0x000 29 #define BM_SSP_CTRL0_RUN (1 << 29) 30 #define BM_SSP_CTRL0_SDIO_IRQ_CHECK (1 << 28) 31 #define BM_SSP_CTRL0_LOCK_CS (1 << 27) 32 #define BM_SSP_CTRL0_IGNORE_CRC (1 << 26) 33 #define BM_SSP_CTRL0_READ (1 << 25) 34 #define BM_SSP_CTRL0_DATA_XFER (1 << 24) 35 #define BP_SSP_CTRL0_BUS_WIDTH 22 36 #define BM_SSP_CTRL0_BUS_WIDTH (0x3 << 22) 37 #define BM_SSP_CTRL0_WAIT_FOR_IRQ (1 << 21) 38 #define BM_SSP_CTRL0_WAIT_FOR_CMD (1 << 20) 39 #define BM_SSP_CTRL0_LONG_RESP (1 << 19) 40 #define BM_SSP_CTRL0_GET_RESP (1 << 17) 41 #define BM_SSP_CTRL0_ENABLE (1 << 16) 42 #define BP_SSP_CTRL0_XFER_COUNT 0 43 #define BM_SSP_CTRL0_XFER_COUNT 0xffff 44 #define HW_SSP_CMD0 0x010 45 #define BM_SSP_CMD0_DBL_DATA_RATE_EN (1 << 25) 46 #define BM_SSP_CMD0_SLOW_CLKING_EN (1 << 22) 47 #define BM_SSP_CMD0_CONT_CLKING_EN (1 << 21) 48 #define BM_SSP_CMD0_APPEND_8CYC (1 << 20) 49 #define BP_SSP_CMD0_BLOCK_SIZE 16 50 #define BM_SSP_CMD0_BLOCK_SIZE (0xf << 16) 51 #define BP_SSP_CMD0_BLOCK_COUNT 8 52 #define BM_SSP_CMD0_BLOCK_COUNT (0xff << 8) 53 #define BP_SSP_CMD0_CMD 0 54 #define BM_SSP_CMD0_CMD 0xff 55 #define HW_SSP_CMD1 0x020 56 #define HW_SSP_XFER_SIZE 0x030 57 #define HW_SSP_BLOCK_SIZE 0x040 58 #define BP_SSP_BLOCK_SIZE_BLOCK_COUNT 4 59 #define BM_SSP_BLOCK_SIZE_BLOCK_COUNT (0xffffff << 4) 60 #define BP_SSP_BLOCK_SIZE_BLOCK_SIZE 0 61 #define BM_SSP_BLOCK_SIZE_BLOCK_SIZE 0xf 62 #define HW_SSP_TIMING(h) (ssp_is_old(h) ? 0x050 : 0x070) 63 #define BP_SSP_TIMING_TIMEOUT 16 64 #define BM_SSP_TIMING_TIMEOUT (0xffff << 16) 65 #define BP_SSP_TIMING_CLOCK_DIVIDE 8 66 #define BM_SSP_TIMING_CLOCK_DIVIDE (0xff << 8) 67 #define BF_SSP_TIMING_CLOCK_DIVIDE(v) \ 68 (((v) << 8) & BM_SSP_TIMING_CLOCK_DIVIDE) 69 #define BP_SSP_TIMING_CLOCK_RATE 0 70 #define BM_SSP_TIMING_CLOCK_RATE 0xff 71 #define BF_SSP_TIMING_CLOCK_RATE(v) \ 72 (((v) << 0) & BM_SSP_TIMING_CLOCK_RATE) 73 #define HW_SSP_CTRL1(h) (ssp_is_old(h) ? 0x060 : 0x080) 74 #define BM_SSP_CTRL1_SDIO_IRQ (1 << 31) 75 #define BM_SSP_CTRL1_SDIO_IRQ_EN (1 << 30) 76 #define BM_SSP_CTRL1_RESP_ERR_IRQ (1 << 29) 77 #define BM_SSP_CTRL1_RESP_ERR_IRQ_EN (1 << 28) 78 #define BM_SSP_CTRL1_RESP_TIMEOUT_IRQ (1 << 27) 79 #define BM_SSP_CTRL1_RESP_TIMEOUT_IRQ_EN (1 << 26) 80 #define BM_SSP_CTRL1_DATA_TIMEOUT_IRQ (1 << 25) 81 #define BM_SSP_CTRL1_DATA_TIMEOUT_IRQ_EN (1 << 24) 82 #define BM_SSP_CTRL1_DATA_CRC_IRQ (1 << 23) 83 #define BM_SSP_CTRL1_DATA_CRC_IRQ_EN (1 << 22) 84 #define BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ (1 << 21) 85 #define BM_SSP_CTRL1_FIFO_UNDERRUN_IRQ_EN (1 << 20) 86 #define BM_SSP_CTRL1_RECV_TIMEOUT_IRQ (1 << 17) 87 #define BM_SSP_CTRL1_RECV_TIMEOUT_IRQ_EN (1 << 16) 88 #define BM_SSP_CTRL1_FIFO_OVERRUN_IRQ (1 << 15) 89 #define BM_SSP_CTRL1_FIFO_OVERRUN_IRQ_EN (1 << 14) 90 #define BM_SSP_CTRL1_DMA_ENABLE (1 << 13) 91 #define BM_SSP_CTRL1_PHASE (1 << 10) 92 #define BM_SSP_CTRL1_POLARITY (1 << 9) 93 #define BP_SSP_CTRL1_WORD_LENGTH 4 94 #define BM_SSP_CTRL1_WORD_LENGTH (0xf << 4) 95 #define BF_SSP_CTRL1_WORD_LENGTH(v) \ 96 (((v) << 4) & BM_SSP_CTRL1_WORD_LENGTH) 97 #define BV_SSP_CTRL1_WORD_LENGTH__FOUR_BITS 0x3 98 #define BV_SSP_CTRL1_WORD_LENGTH__EIGHT_BITS 0x7 99 #define BV_SSP_CTRL1_WORD_LENGTH__SIXTEEN_BITS 0xF 100 #define BP_SSP_CTRL1_SSP_MODE 0 101 #define BM_SSP_CTRL1_SSP_MODE 0xf 102 #define BF_SSP_CTRL1_SSP_MODE(v) \ 103 (((v) << 0) & BM_SSP_CTRL1_SSP_MODE) 104 #define BV_SSP_CTRL1_SSP_MODE__SPI 0x0 105 #define BV_SSP_CTRL1_SSP_MODE__SSI 0x1 106 #define BV_SSP_CTRL1_SSP_MODE__SD_MMC 0x3 107 #define BV_SSP_CTRL1_SSP_MODE__MS 0x4 108 109 #define HW_SSP_DATA(h) (ssp_is_old(h) ? 0x070 : 0x090) 110 111 #define HW_SSP_SDRESP0(h) (ssp_is_old(h) ? 0x080 : 0x0a0) 112 #define HW_SSP_SDRESP1(h) (ssp_is_old(h) ? 0x090 : 0x0b0) 113 #define HW_SSP_SDRESP2(h) (ssp_is_old(h) ? 0x0a0 : 0x0c0) 114 #define HW_SSP_SDRESP3(h) (ssp_is_old(h) ? 0x0b0 : 0x0d0) 115 #define HW_SSP_STATUS(h) (ssp_is_old(h) ? 0x0c0 : 0x100) 116 #define BM_SSP_STATUS_CARD_DETECT (1 << 28) 117 #define BM_SSP_STATUS_SDIO_IRQ (1 << 17) 118 #define BM_SSP_STATUS_FIFO_EMPTY (1 << 5) 119 120 #define BF_SSP(value, field) (((value) << BP_SSP_##field) & BM_SSP_##field) 121 122 #define SSP_PIO_NUM 3 123 124 enum mxs_ssp_id { 125 IMX23_SSP, 126 IMX28_SSP, 127 }; 128 129 struct mxs_ssp { 130 struct device *dev; 131 void __iomem *base; 132 struct clk *clk; 133 unsigned int clk_rate; 134 enum mxs_ssp_id devid; 135 136 struct dma_chan *dmach; 137 unsigned int dma_dir; 138 enum dma_transfer_direction slave_dirn; 139 u32 ssp_pio_words[SSP_PIO_NUM]; 140 }; 141 142 void mxs_ssp_set_clk_rate(struct mxs_ssp *ssp, unsigned int rate); 143 144 #endif /* __LINUX_SPI_MXS_SPI_H__ */ 145