diff options
| author | Jaehoon Chung <jh80.chung@samsung.com> | 2011-10-18 01:26:42 -0400 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2011-10-26 16:32:29 -0400 |
| commit | eb0d8f135b6730d6d0324a064664d121334290e7 (patch) | |
| tree | 74876f5d20163bb5e9b185d9357237e1f22a2262 /drivers/mmc/core/mmc_ops.c | |
| parent | 881d1c25f765938a95def5afe39486ce39f9fc96 (diff) | |
mmc: core: support HPI send command
HPI command is defined in eMMC4.41.
This feature is important for eMMC4.5 devices.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/core/mmc_ops.c')
| -rw-r--r-- | drivers/mmc/core/mmc_ops.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index 4e11d56b3f7..007863eea4f 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -547,3 +547,34 @@ int mmc_bus_test(struct mmc_card *card, u8 bus_width) err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width); return err; } + +int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status) +{ + struct mmc_command cmd = {0}; + unsigned int opcode; + unsigned int flags; + int err; + + opcode = card->ext_csd.hpi_cmd; + if (opcode == MMC_STOP_TRANSMISSION) + flags = MMC_RSP_R1 | MMC_CMD_AC; + else if (opcode == MMC_SEND_STATUS) + flags = MMC_RSP_R1 | MMC_CMD_AC; + + cmd.opcode = opcode; + cmd.arg = card->rca << 16 | 1; + cmd.flags = flags; + cmd.cmd_timeout_ms = card->ext_csd.out_of_int_time; + + err = mmc_wait_for_cmd(card->host, &cmd, 0); + if (err) { + pr_warn("%s: error %d interrupting operation. " + "HPI command response %#x\n", mmc_hostname(card->host), + err, cmd.resp[0]); + return err; + } + if (status) + *status = cmd.resp[0]; + + return 0; +} |