memstick: add support for 8-bit parallel mode
Newer MemoryStick (HG) cards and hosts support 8-bit parallel mode of operation in addition to original 4-bit and 1-bit modes. Signed-off-by: Alex Dubov <oakad@yahoo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -816,12 +816,13 @@ static int mspro_block_wait_for_ced(struct memstick_dev *card)
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return card->current_mrq.error;
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}
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static int mspro_block_switch_to_parallel(struct memstick_dev *card)
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static int mspro_block_set_interface(struct memstick_dev *card,
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unsigned char sys_reg)
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{
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struct memstick_host *host = card->host;
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struct mspro_block_data *msb = memstick_get_drvdata(card);
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struct mspro_param_register param = {
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.system = MEMSTICK_SYS_PAR4,
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.system = sys_reg,
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.data_count = 0,
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.data_address = 0,
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.tpc_param = 0
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@ -833,41 +834,70 @@ static int mspro_block_switch_to_parallel(struct memstick_dev *card)
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sizeof(param));
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memstick_new_req(host);
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wait_for_completion(&card->mrq_complete);
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if (card->current_mrq.error)
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return card->current_mrq.error;
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}
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static int mspro_block_switch_interface(struct memstick_dev *card)
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{
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struct memstick_host *host = card->host;
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struct mspro_block_data *msb = memstick_get_drvdata(card);
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int rc = 0;
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if (msb->caps & MEMSTICK_CAP_PAR4)
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rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR4);
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else
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return 0;
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if (rc) {
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printk(KERN_WARNING
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"%s: could not switch to 4-bit mode, error %d\n",
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card->dev.bus_id, rc);
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return 0;
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}
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msb->system = MEMSTICK_SYS_PAR4;
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host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_PAR4);
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printk(KERN_INFO "%s: switching to 4-bit parallel mode\n",
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card->dev.bus_id);
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if (msb->caps & MEMSTICK_CAP_PAR8) {
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rc = mspro_block_set_interface(card, MEMSTICK_SYS_PAR8);
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if (!rc) {
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msb->system = MEMSTICK_SYS_PAR8;
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host->set_param(host, MEMSTICK_INTERFACE,
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MEMSTICK_PAR8);
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printk(KERN_INFO
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"%s: switching to 8-bit parallel mode\n",
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card->dev.bus_id);
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} else
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printk(KERN_WARNING
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"%s: could not switch to 8-bit mode, error %d\n",
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card->dev.bus_id, rc);
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}
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card->next_request = h_mspro_block_req_init;
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msb->mrq_handler = h_mspro_block_default;
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memstick_init_req(&card->current_mrq, MS_TPC_GET_INT, NULL, 1);
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memstick_new_req(card->host);
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wait_for_completion(&card->mrq_complete);
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rc = card->current_mrq.error;
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if (card->current_mrq.error) {
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if (rc) {
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printk(KERN_WARNING
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"%s: interface error, trying to fall back to serial\n",
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card->dev.bus_id);
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msb->system = MEMSTICK_SYS_SERIAL;
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host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
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msleep(1000);
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msleep(10);
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host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
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host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
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if (memstick_set_rw_addr(card))
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return card->current_mrq.error;
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param.system = msb->system;
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card->next_request = h_mspro_block_req_init;
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msb->mrq_handler = h_mspro_block_default;
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memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, ¶m,
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sizeof(param));
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memstick_new_req(host);
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wait_for_completion(&card->mrq_complete);
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return -EFAULT;
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rc = memstick_set_rw_addr(card);
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if (!rc)
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rc = mspro_block_set_interface(card, msb->system);
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}
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return 0;
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return rc;
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}
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/* Memory allocated for attributes by this function should be freed by
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@ -1053,12 +1083,11 @@ static int mspro_block_init_card(struct memstick_dev *card)
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return -EIO;
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msb->caps = host->caps;
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if (msb->caps & MEMSTICK_CAP_PAR4) {
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if (mspro_block_switch_to_parallel(card))
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printk(KERN_WARNING "%s: could not switch to "
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"parallel interface\n", card->dev.bus_id);
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}
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rc = mspro_block_switch_interface(card);
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if (rc)
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return rc;
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msleep(200);
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rc = mspro_block_wait_for_ced(card);
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if (rc)
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return rc;
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