[rt2x00-users] [PATCH 2/3] rt2800: Add documentation on MCU requests

Ivo Van Doorn ivdoorn at gmail.com
Mon Jan 23 01:55:48 AEDT 2012


On Tue, Jan 17, 2012 at 5:45 PM, Jakub Kicinski <kubakici at wp.pl> wrote:
> Add documentation on MCU communication, some of known commands and
> their arguments. Supplement command ids.
>
> Signed-off-by: Jakub Kicinski <kubakici at wp.pl>

Acked-by: Ivo van Doorn <IvDoorn at gmail.com>

> ---
>  drivers/net/wireless/rt2x00/rt2800.h    |   14 +++++++++++++-
>  drivers/net/wireless/rt2x00/rt2800pci.c |    8 +++++---
>  2 files changed, 18 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h
> index 2571a2f..822f9e5 100644
> --- a/drivers/net/wireless/rt2x00/rt2800.h
> +++ b/drivers/net/wireless/rt2x00/rt2800.h
> @@ -1627,6 +1627,7 @@ 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)
> @@ -1636,6 +1637,8 @@ 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)
> @@ -1645,6 +1648,7 @@ struct mac_iveiv_entry {
>
>  /*
>  * H2M_MAILBOX_STATUS:
> + * Command status will be saved to same slot as command id.
>  */
>  #define H2M_MAILBOX_STATUS             0x701c
>
> @@ -2259,6 +2263,12 @@ 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
> @@ -2279,7 +2289,9 @@ 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.
> diff --git a/drivers/net/wireless/rt2x00/rt2800pci.c b/drivers/net/wireless/rt2x00/rt2800pci.c
> index 640f19d..451591b 100644
> --- a/drivers/net/wireless/rt2x00/rt2800pci.c
> +++ b/drivers/net/wireless/rt2x00/rt2800pci.c
> @@ -563,11 +563,13 @@ static int rt2800pci_set_device_state(struct rt2x00_dev *rt2x00dev,
>                /* PCIe devices won't report status after SLEEP request. */
>                rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_STATUS, ~0);
>                rt2x00pci_register_write(rt2x00dev, H2M_MAILBOX_CID, ~0);
> -               rt2800_mcu_request(rt2x00dev, MCU_SLEEP, 0x01, 0xff, 0x01);
> +               rt2800_mcu_request(rt2x00dev, MCU_SLEEP, TOKEN_SLEEP,
> +                                  0xff, 0x01);
>                break;
>        case 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);
>                break;
>        default:
>                retval = -ENOTSUPP;
>
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