1 /* 2 * linux/drivers/mmc/sdio_ops.c 3 * 4 * Copyright 2006-2007 Pierre Ossman 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or (at 9 * your option) any later version. 10 */ 11 12 #include <linux/scatterlist.h> 13 14 #include <linux/mmc/host.h> 15 #include <linux/mmc/card.h> 16 #include <linux/mmc/mmc.h> 17 #include <linux/mmc/sdio.h> 18 19 #include "core.h" 20 #include "sdio_ops.h" 21 22 int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) 23 { 24 struct mmc_command cmd; 25 int i, err = 0; 26 27 BUG_ON(!host); 28 29 memset(&cmd, 0, sizeof(struct mmc_command)); 30 31 cmd.opcode = SD_IO_SEND_OP_COND; 32 cmd.arg = ocr; 33 cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR; 34 35 for (i = 100; i; i--) { 36 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); 37 if (err) 38 break; 39 40 /* if we're just probing, do a single pass */ 41 if (ocr == 0) 42 break; 43 44 /* otherwise wait until reset completes */ 45 if (mmc_host_is_spi(host)) { 46 /* 47 * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate 48 * an initialized card under SPI, but some cards 49 * (Marvell's) only behave when looking at this 50 * one. 51 */ 52 if (cmd.resp[1] & MMC_CARD_BUSY) 53 break; 54 } else { 55 if (cmd.resp[0] & MMC_CARD_BUSY) 56 break; 57 } 58 59 err = -ETIMEDOUT; 60 61 mmc_delay(10); 62 } 63 64 if (rocr) 65 *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0]; 66 67 return err; 68 } 69 70 int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, 71 unsigned addr, u8 in, u8* out) 72 { 73 struct mmc_command cmd; 74 int err; 75 76 BUG_ON(!card); 77 BUG_ON(fn > 7); 78 79 memset(&cmd, 0, sizeof(struct mmc_command)); 80 81 cmd.opcode = SD_IO_RW_DIRECT; 82 cmd.arg = write ? 0x80000000 : 0x00000000; 83 cmd.arg |= fn << 28; 84 cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; 85 cmd.arg |= addr << 9; 86 cmd.arg |= in; 87 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; 88 89 err = mmc_wait_for_cmd(card->host, &cmd, 0); 90 if (err) 91 return err; 92 93 if (mmc_host_is_spi(card->host)) { 94 /* host driver already reported errors */ 95 } else { 96 if (cmd.resp[0] & R5_ERROR) 97 return -EIO; 98 if (cmd.resp[0] & R5_FUNCTION_NUMBER) 99 return -EINVAL; 100 if (cmd.resp[0] & R5_OUT_OF_RANGE) 101 return -ERANGE; 102 } 103 104 if (out) { 105 if (mmc_host_is_spi(card->host)) 106 *out = (cmd.resp[0] >> 8) & 0xFF; 107 else 108 *out = cmd.resp[0] & 0xFF; 109 } 110 111 return 0; 112 } 113 114 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, 115 unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz) 116 { 117 struct mmc_request mrq; 118 struct mmc_command cmd; 119 struct mmc_data data; 120 struct scatterlist sg; 121 122 BUG_ON(!card); 123 BUG_ON(fn > 7); 124 BUG_ON(blocks == 1 && blksz > 512); 125 WARN_ON(blocks == 0); 126 WARN_ON(blksz == 0); 127 128 memset(&mrq, 0, sizeof(struct mmc_request)); 129 memset(&cmd, 0, sizeof(struct mmc_command)); 130 memset(&data, 0, sizeof(struct mmc_data)); 131 132 mrq.cmd = &cmd; 133 mrq.data = &data; 134 135 cmd.opcode = SD_IO_RW_EXTENDED; 136 cmd.arg = write ? 0x80000000 : 0x00000000; 137 cmd.arg |= fn << 28; 138 cmd.arg |= incr_addr ? 0x04000000 : 0x00000000; 139 cmd.arg |= addr << 9; 140 if (blocks == 1 && blksz <= 512) 141 cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */ 142 else 143 cmd.arg |= 0x08000000 | blocks; /* block mode */ 144 cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; 145 146 data.blksz = blksz; 147 data.blocks = blocks; 148 data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ; 149 data.sg = &sg; 150 data.sg_len = 1; 151 152 sg_init_one(&sg, buf, blksz * blocks); 153 154 mmc_set_data_timeout(&data, card); 155 156 mmc_wait_for_req(card->host, &mrq); 157 158 if (cmd.error) 159 return cmd.error; 160 if (data.error) 161 return data.error; 162 163 if (mmc_host_is_spi(card->host)) { 164 /* host driver already reported errors */ 165 } else { 166 if (cmd.resp[0] & R5_ERROR) 167 return -EIO; 168 if (cmd.resp[0] & R5_FUNCTION_NUMBER) 169 return -EINVAL; 170 if (cmd.resp[0] & R5_OUT_OF_RANGE) 171 return -ERANGE; 172 } 173 174 return 0; 175 } 176 177