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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 | /* * linux/drivers/mmc/sdio_ops.c * * Copyright 2006-2007 Pierre Ossman * * 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. */ #include <linux/scatterlist.h> #include <linux/mmc/host.h> #include <linux/mmc/card.h> #include <linux/mmc/mmc.h> #include <linux/mmc/sdio.h> #include "core.h" #include "sdio_ops.h" int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr) { struct mmc_command cmd = {}; int i, err = 0; cmd.opcode = SD_IO_SEND_OP_COND; cmd.arg = ocr; cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR; for (i = 100; i; i--) { err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES); if (err) break; /* if we're just probing, do a single pass */ if (ocr == 0) break; /* otherwise wait until reset completes */ if (mmc_host_is_spi(host)) { /* * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate * an initialized card under SPI, but some cards * (Marvell's) only behave when looking at this * one. */ if (cmd.resp[1] & MMC_CARD_BUSY) break; } else { if (cmd.resp[0] & MMC_CARD_BUSY) break; } err = -ETIMEDOUT; mmc_delay(10); } if (rocr) *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0]; return err; } static int mmc_io_rw_direct_host(struct mmc_host *host, int write, unsigned fn, unsigned addr, u8 in, u8 *out) { struct mmc_command cmd = {}; int err; if (fn > 7) return -EINVAL; /* sanity check */ if (addr & ~0x1FFFF) return -EINVAL; cmd.opcode = SD_IO_RW_DIRECT; cmd.arg = write ? 0x80000000 : 0x00000000; cmd.arg |= fn << 28; cmd.arg |= (write && out) ? 0x08000000 : 0x00000000; cmd.arg |= addr << 9; cmd.arg |= in; cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC; err = mmc_wait_for_cmd(host, &cmd, 0); if (err) return err; if (mmc_host_is_spi(host)) { /* host driver already reported errors */ } else { if (cmd.resp[0] & R5_ERROR) return -EIO; if (cmd.resp[0] & R5_FUNCTION_NUMBER) return -EINVAL; if (cmd.resp[0] & R5_OUT_OF_RANGE) return -ERANGE; } if (out) { if (mmc_host_is_spi(host)) *out = (cmd.resp[0] >> 8) & 0xFF; else *out = cmd.resp[0] & 0xFF; } return 0; } int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn, unsigned addr, u8 in, u8 *out) { return mmc_io_rw_direct_host(card->host, write, fn, addr, in, out); } int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn, unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz) { struct mmc_request mrq = {}; struct mmc_command cmd = {}; struct mmc_data data = {}; struct scatterlist sg, *sg_ptr; struct sg_table sgtable; unsigned int nents, left_size, i; unsigned int seg_size = card->host->max_seg_size; WARN_ON(blksz == 0); /* sanity check */ if (addr & ~0x1FFFF) return -EINVAL; mrq.cmd = &cmd; mrq.data = &data; cmd.opcode = SD_IO_RW_EXTENDED; cmd.arg = write ? 0x80000000 : 0x00000000; cmd.arg |= fn << 28; cmd.arg |= incr_addr ? 0x04000000 : 0x00000000; cmd.arg |= addr << 9; if (blocks == 0) cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */ else cmd.arg |= 0x08000000 | blocks; /* block mode */ cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC; data.blksz = blksz; /* Code in host drivers/fwk assumes that "blocks" always is >=1 */ data.blocks = blocks ? blocks : 1; data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ; left_size = data.blksz * data.blocks; nents = DIV_ROUND_UP(left_size, seg_size); if (nents > 1) { if (sg_alloc_table(&sgtable, nents, GFP_KERNEL)) return -ENOMEM; data.sg = sgtable.sgl; data.sg_len = nents; for_each_sg(data.sg, sg_ptr, data.sg_len, i) { sg_set_buf(sg_ptr, buf + i * seg_size, min(seg_size, left_size)); left_size -= seg_size; } } else { data.sg = &sg; data.sg_len = 1; sg_init_one(&sg, buf, left_size); } mmc_set_data_timeout(&data, card); mmc_wait_for_req(card->host, &mrq); if (nents > 1) sg_free_table(&sgtable); if (cmd.error) return cmd.error; if (data.error) return data.error; if (mmc_host_is_spi(card->host)) { /* host driver already reported errors */ } else { if (cmd.resp[0] & R5_ERROR) return -EIO; if (cmd.resp[0] & R5_FUNCTION_NUMBER) return -EINVAL; if (cmd.resp[0] & R5_OUT_OF_RANGE) return -ERANGE; } return 0; } int sdio_reset(struct mmc_host *host) { int ret; u8 abort; /* SDIO Simplified Specification V2.0, 4.4 Reset for SDIO */ ret = mmc_io_rw_direct_host(host, 0, 0, SDIO_CCCR_ABORT, 0, &abort); if (ret) abort = 0x08; else abort |= 0x08; return mmc_io_rw_direct_host(host, 1, 0, SDIO_CCCR_ABORT, abort, NULL); } |