On Mon, Sep 02, 2019 at 04:21:27PM +0800, JC Kuo wrote:
> Tegra194 XUSB host controller has rearranged mailbox registers. This
> commit makes mailbox registers address a part of "soc" data so that
> xhci-tegra driver can be used for Tegra194.
>
> Signed-off-by: JC Kuo <jckuo@xxxxxxxxxx>
> ---
> drivers/usb/host/xhci-tegra.c | 58 +++++++++++++++++++++++++----------
> 1 file changed, 42 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
> index dafc65911fc0..247b08ca49ee 100644
> --- a/drivers/usb/host/xhci-tegra.c
> +++ b/drivers/usb/host/xhci-tegra.c
> @@ -42,19 +42,18 @@
> #define XUSB_CFG_CSB_BASE_ADDR 0x800
>
> /* FPCI mailbox registers */
> -#define XUSB_CFG_ARU_MBOX_CMD 0x0e4
> +/* XUSB_CFG_ARU_MBOX_CMD */
> #define MBOX_DEST_FALC BIT(27)
> #define MBOX_DEST_PME BIT(28)
> #define MBOX_DEST_SMI BIT(29)
> #define MBOX_DEST_XHCI BIT(30)
> #define MBOX_INT_EN BIT(31)
> -#define XUSB_CFG_ARU_MBOX_DATA_IN 0x0e8
> +/* XUSB_CFG_ARU_MBOX_DATA_IN and XUSB_CFG_ARU_MBOX_DATA_OUT */
> #define CMD_DATA_SHIFT 0
> #define CMD_DATA_MASK 0xffffff
> #define CMD_TYPE_SHIFT 24
> #define CMD_TYPE_MASK 0xff
> -#define XUSB_CFG_ARU_MBOX_DATA_OUT 0x0ec
> -#define XUSB_CFG_ARU_MBOX_OWNER 0x0f0
> +/* XUSB_CFG_ARU_MBOX_OWNER */
> #define MBOX_OWNER_NONE 0
> #define MBOX_OWNER_FW 1
> #define MBOX_OWNER_SW 2
> @@ -146,6 +145,13 @@ struct tegra_xusb_phy_type {
> unsigned int num;
> };
>
> +struct tega_xusb_mbox_regs {
> + unsigned int cmd;
> + unsigned int data_in;
> + unsigned int data_out;
> + unsigned int owner;
Shouldn't these all be u8 values?
> +};
> +
> struct tegra_xusb_soc {
> const char *firmware;
> const char * const *supply_names;
> @@ -160,6 +166,8 @@ struct tegra_xusb_soc {
> } usb2, ulpi, hsic, usb3;
> } ports;
>
> + struct tega_xusb_mbox_regs mbox;
> +
> bool scale_ss_clock;
> bool has_ipfs;
> };
> @@ -395,15 +403,15 @@ static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
> * ACK/NAK messages.
> */
> if (!(msg->cmd == MBOX_CMD_ACK || msg->cmd == MBOX_CMD_NAK)) {
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
> + value = fpci_readl(tegra, tegra->soc->mbox.owner);
> if (value != MBOX_OWNER_NONE) {
> dev_err(tegra->dev, "mailbox is busy\n");
> return -EBUSY;
> }
>
> - fpci_writel(tegra, MBOX_OWNER_SW, XUSB_CFG_ARU_MBOX_OWNER);
> + fpci_writel(tegra, MBOX_OWNER_SW, tegra->soc->mbox.owner);
>
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
> + value = fpci_readl(tegra, tegra->soc->mbox.owner);
> if (value != MBOX_OWNER_SW) {
> dev_err(tegra->dev, "failed to acquire mailbox\n");
> return -EBUSY;
> @@ -413,17 +421,17 @@ static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
> }
>
> value = tegra_xusb_mbox_pack(msg);
> - fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_DATA_IN);
> + fpci_writel(tegra, value, tegra->soc->mbox.data_in);
>
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
> + value = fpci_readl(tegra, tegra->soc->mbox.cmd);
> value |= MBOX_INT_EN | MBOX_DEST_FALC;
> - fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
> + fpci_writel(tegra, value, tegra->soc->mbox.cmd);
>
> if (wait_for_idle) {
> unsigned long timeout = jiffies + msecs_to_jiffies(250);
>
> while (time_before(jiffies, timeout)) {
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
> + value = fpci_readl(tegra, tegra->soc->mbox.owner);
> if (value == MBOX_OWNER_NONE)
> break;
>
> @@ -431,7 +439,7 @@ static int tegra_xusb_mbox_send(struct tegra_xusb *tegra,
> }
>
> if (time_after(jiffies, timeout))
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_OWNER);
> + value = fpci_readl(tegra, tegra->soc->mbox.owner);
>
> if (value != MBOX_OWNER_NONE)
> return -ETIMEDOUT;
> @@ -598,16 +606,16 @@ static irqreturn_t tegra_xusb_mbox_thread(int irq, void *data)
>
> mutex_lock(&tegra->lock);
>
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_DATA_OUT);
> + value = fpci_readl(tegra, tegra->soc->mbox.data_out);
> tegra_xusb_mbox_unpack(&msg, value);
>
> - value = fpci_readl(tegra, XUSB_CFG_ARU_MBOX_CMD);
> + value = fpci_readl(tegra, tegra->soc->mbox.cmd);
> value &= ~MBOX_DEST_SMI;
> - fpci_writel(tegra, value, XUSB_CFG_ARU_MBOX_CMD);
> + fpci_writel(tegra, value, tegra->soc->mbox.cmd);
>
> /* clear mailbox owner if no ACK/NAK is required */
> if (!tegra_xusb_mbox_cmd_requires_ack(msg.cmd))
> - fpci_writel(tegra, MBOX_OWNER_NONE, XUSB_CFG_ARU_MBOX_OWNER);
> + fpci_writel(tegra, MBOX_OWNER_NONE, tegra->soc->mbox.owner);
>
> tegra_xusb_mbox_handle(tegra, &msg);
>
> @@ -1365,6 +1373,12 @@ static const struct tegra_xusb_soc tegra124_soc = {
> },
> .scale_ss_clock = true,
> .has_ipfs = true,
> + .mbox = {
> + .cmd = 0xe4,
> + .data_in = 0xe8,
> + .data_out = 0xec,
> + .owner = 0xf0,
> + },
> };
> MODULE_FIRMWARE("nvidia/tegra124/xusb.bin");
>
> @@ -1397,6 +1411,12 @@ static const struct tegra_xusb_soc tegra210_soc = {
> },
> .scale_ss_clock = false,
> .has_ipfs = true,
> + .mbox = {
> + .cmd = 0xe4,
> + .data_in = 0xe8,
> + .data_out = 0xec,
> + .owner = 0xf0,
> + },
> };
> MODULE_FIRMWARE("nvidia/tegra210/xusb.bin");
>
> @@ -1422,6 +1442,12 @@ static const struct tegra_xusb_soc tegra186_soc = {
> },
> .scale_ss_clock = false,
> .has_ipfs = false,
> + .mbox = {
> + .cmd = 0xe4,
> + .data_in = 0xe8,
> + .data_out = 0xec,
> + .owner = 0xf0,
> + },
This did not change any existing functionality, is there a follow-on
patch somewhere that takes advantage of this change to enable different
hardware? Otherwise this doesn't seem worth it.
thanks,
greg k-h
