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qi-glamo-mmc-multiblock-read.patch
Improve glamo-mmc so that it uses MMC_READ_MULTIPLE_BLOCK and copes with 64 blocks in one command (and STOP sent after each set), instead of sending a new command per-block Signed-off-by: Andy Green <andy@openmoko.com>
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@ -400,7 +400,7 @@ const struct board_api board_api_gta02 = {
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"rootfstype=ext3 " \
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"root=/dev/mmcblk0p1 " \
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"console=ttySAC2,115200 " \
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"loglevel=8 " \
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"loglevel=4 " \
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"init=/sbin/init "\
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"ro"
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},
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@ -420,7 +420,7 @@ const struct board_api board_api_gta02 = {
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"rootfstype=jffs2 " \
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"root=/dev/mtdblock6 " \
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"console=ttySAC2,115200 " \
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"loglevel=3 " \
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"loglevel=8 " \
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"init=/sbin/init "\
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"ro"
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},
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@ -47,6 +47,9 @@ static int mmc_ready = 0;
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//static int wide = 0;
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static enum card_type card_type = CARDTYPE_NONE;
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#define MULTI_READ_BLOCKS_PER_COMMAND 64
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int mmc_read(unsigned long src, u8 *dst, int size);
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#define UNSTUFF_BITS(resp,start,size) \
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@ -422,6 +425,7 @@ int mmc_read(unsigned long src, u8 *dst, int size)
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int resp;
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u8 response[16];
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int size_original = size;
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int lump;
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if (((int)dst) & 1) {
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puts("Bad align on dst\n");
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@ -435,18 +439,23 @@ int mmc_read(unsigned long src, u8 *dst, int size)
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return resp;
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while (size) {
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/* glamo mmc times out as this increases too much */
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lump = MULTI_READ_BLOCKS_PER_COMMAND;
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if (lump > size)
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lump = size;
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switch (card_type) {
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case CARDTYPE_SDHC: /* block addressing */
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resp = mmc_cmd(MMC_READ_SINGLE_BLOCK,
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resp = mmc_cmd(MMC_READ_MULTIPLE_BLOCK,
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src,
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MMC_CMD_ADTC | MMC_RSP_R1 |
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MMC_DATA_READ, MMC_BLOCK_SIZE, 1, 0,
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MMC_DATA_READ, MMC_BLOCK_SIZE, lump, 1,
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(u16 *)&response[0]);
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break;
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default: /* byte addressing */
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resp = mmc_cmd(MMC_READ_SINGLE_BLOCK, src * MMC_BLOCK_SIZE,
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resp = mmc_cmd(MMC_READ_MULTIPLE_BLOCK, src * MMC_BLOCK_SIZE,
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MMC_CMD_ADTC | MMC_RSP_R1 | MMC_DATA_READ,
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MMC_BLOCK_SIZE, 1, 0,
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MMC_BLOCK_SIZE, lump, 1,
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(u16 *)&response[0]);
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break;
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}
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@ -459,14 +468,22 @@ int mmc_read(unsigned long src, u8 *dst, int size)
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0xff00) | 2, GLAMO_REG_CLOCK_GEN8);
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do_pio_read((u16 *)dst, MMC_BLOCK_SIZE >> 1);
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do_pio_read((u16 *)dst, lump * MMC_BLOCK_SIZE >> 1);
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if (size)
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size--;
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size -= lump;
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dst += lump * MMC_BLOCK_SIZE;
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src += lump;
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resp = mmc_cmd(MMC_STOP_TRANSMISSION, 0,
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MMC_CMD_AC | MMC_RSP_R1B, 0, 0, 0,
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(u16 *)&response[0]);
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if (resp)
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return resp;
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dst += MMC_BLOCK_SIZE;
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src++;
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}
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return size_original;
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}
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