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rt2800: Add documentation on MCU requests 

Add documentation on MCU communication, some of known commands and
their arguments. Supplement command ids.

Signed-off-by: Jakub Kicinski <kubakici@wp.pl>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Jakub Kicinski 2012-02-22 21:58:57 +01:00 committed by John W. Linville
parent 2530c55ea9
commit 09a3311c1a
2 changed files with 19 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/wireless/rt2x00/rt2800.h
View File

@ -1637,6 +1637,7 @@ struct mac_iveiv_entry {
/*
* H2M_MAILBOX_CSR: Host-to-MCU Mailbox.
* CMD_TOKEN: Command id, 0xff disable status reporting.
*/
#define H2M_MAILBOX_CSR 0x7010
#define H2M_MAILBOX_CSR_ARG0 FIELD32(0x000000ff)
@ -1646,6 +1647,8 @@ struct mac_iveiv_entry {
/*
* H2M_MAILBOX_CID:
* Free slots contain 0xff. MCU will store command's token to lowest free slot.
* If all slots are occupied status will be dropped.
*/
#define H2M_MAILBOX_CID 0x7014
#define H2M_MAILBOX_CID_CMD0 FIELD32(0x000000ff)
@ -1655,6 +1658,7 @@ struct mac_iveiv_entry {
/*
* H2M_MAILBOX_STATUS:
* Command status will be saved to same slot as command id.
*/
#define H2M_MAILBOX_STATUS 0x701c
@ -2298,6 +2302,12 @@ struct mac_iveiv_entry {
/*
* MCU mailbox commands.
* MCU_SLEEP - go to power-save mode.
* arg1: 1: save as much power as possible, 0: save less power.
* status: 1: success, 2: already asleep,
* 3: maybe MAC is busy so can't finish this task.
* MCU_RADIO_OFF
* arg0: 0: do power-saving, NOT turn off radio.
*/
#define MCU_SLEEP 0x30
#define MCU_WAKEUP 0x31
@ -2318,7 +2328,10 @@ struct mac_iveiv_entry {
/*
* MCU mailbox tokens
*/
#define TOKEN_WAKUP 3
#define TOKEN_SLEEP 1
#define TOKEN_RADIO_OFF 2
#define TOKEN_WAKEUP 3
/*
* DMA descriptor defines.

8
drivers/net/wireless/rt2x00/rt2800pci.c
View File

@ -522,14 +522,16 @@ static int rt2800pci_set_state(struct rt2x00_dev *rt2x00dev,
enum dev_state state)
{
if (state == STATE_AWAKE) {
rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKUP, 0, 0x02);
rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKUP);
rt2800_mcu_request(rt2x00dev, MCU_WAKEUP, TOKEN_WAKEUP,
0, 0x02);
rt2800pci_mcu_status(rt2x00dev, TOKEN_WAKEUP);
} else if (state == STATE_SLEEP) {
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_STATUS,
0xffffffff);
rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_CID,
0xffffffff);
rt2800_mcu_request(rt2x00dev, MCU_SLEEP, 0x01, 0xff, 0x01);
rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_SLEEP,
0xff, 0x01);
}
return 0;