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