[PATCH v2] phy-sun4i-usb: Add support for the host usb-phys found on the H3 SoC
Kishon Vijay Abraham I
kishon at ti.com
Sun Nov 22 21:10:45 PST 2015
Hi,
On Sunday 22 November 2015 04:59 PM, Hans de Goede wrote:
> From: Reinder de Haan <patchesrdh at mveas.com>
>
> Note this commit only adds support for phys 1-3, phy 0, the otg phy, is
> not yet (fully) supported after this commit.
>
> Signed-off-by: Reinder de Haan <patchesrdh at mveas.com>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> ---
> Changes in v2:
> -Change break; after dev_err() to return, as intended, fixing a compiler
> warning (the dev_err case should never be reached).
> ---
> .../devicetree/bindings/phy/sun4i-usb-phy.txt | 1 +
> drivers/phy/phy-sun4i-usb.c | 67 +++++++++++++++++-----
> 2 files changed, 53 insertions(+), 15 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> index 0cebf74..95736d7 100644
> --- a/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/sun4i-usb-phy.txt
> @@ -9,6 +9,7 @@ Required properties:
> * allwinner,sun7i-a20-usb-phy
> * allwinner,sun8i-a23-usb-phy
> * allwinner,sun8i-a33-usb-phy
> + * allwinner,sun8i-h3-usb-phy
> - reg : a list of offset + length pairs
> - reg-names :
> * "phy_ctrl"
> diff --git a/drivers/phy/phy-sun4i-usb.c b/drivers/phy/phy-sun4i-usb.c
> index b12964b..11bc9cd 100644
> --- a/drivers/phy/phy-sun4i-usb.c
> +++ b/drivers/phy/phy-sun4i-usb.c
> @@ -46,6 +46,9 @@
> #define REG_PHYBIST 0x08
> #define REG_PHYTUNE 0x0c
> #define REG_PHYCTL_A33 0x10
> +#define REG_PHY_UNK_H3 0x20
> +
> +#define REG_PMU_UNK_H3 0x10
>
> #define PHYCTL_DATA BIT(7)
>
> @@ -79,7 +82,7 @@
> #define PHY_DISCON_TH_SEL 0x2a
> #define PHY_SQUELCH_DETECT 0x3c
>
> -#define MAX_PHYS 3
> +#define MAX_PHYS 4
Is it 4 only for h3-usb-phy or for others too? If so, can we add it in driver data?
>
> /*
> * Note do not raise the debounce time, we must report Vusb high within 100ms
> @@ -88,12 +91,19 @@
> #define DEBOUNCE_TIME msecs_to_jiffies(50)
> #define POLL_TIME msecs_to_jiffies(250)
>
> +enum sun4i_usb_phy_type {
> + sun4i_a10_phy,
> + sun8i_a33_phy,
> + sun8i_h3_phy
> +};
> +
> struct sun4i_usb_phy_data {
> + struct device *dev;
> void __iomem *base;
> struct mutex mutex;
> int num_phys;
> u32 disc_thresh;
> - bool has_a33_phyctl;
> + enum sun4i_usb_phy_type type;
> struct sun4i_usb_phy {
> struct phy *phy;
> void __iomem *pmu;
> @@ -164,12 +174,18 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
>
> mutex_lock(&phy_data->mutex);
>
> - if (phy_data->has_a33_phyctl) {
> + switch (phy_data->type) {
> + case sun4i_a10_phy:
> + phyctl = phy_data->base + REG_PHYCTL_A10;
> + break;
> + case sun8i_a33_phy:
> phyctl = phy_data->base + REG_PHYCTL_A33;
> /* A33 needs us to set phyctl to 0 explicitly */
> writel(0, phyctl);
> - } else {
> - phyctl = phy_data->base + REG_PHYCTL_A10;
> + break;
> + case sun8i_h3_phy:
> + dev_err(phy_data->dev, "H3 usb_phy_write is not supported\n");
> + return;
> }
>
> for (i = 0; i < len; i++) {
> @@ -230,6 +246,7 @@ static int sun4i_usb_phy_init(struct phy *_phy)
> struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
> struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
> int ret;
> + u32 val;
>
> ret = clk_prepare_enable(phy->clk);
> if (ret)
> @@ -241,15 +258,26 @@ static int sun4i_usb_phy_init(struct phy *_phy)
> return ret;
> }
>
> - /* Enable USB 45 Ohm resistor calibration */
> - if (phy->index == 0)
> - sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
> + if (data->type == sun8i_h3_phy) {
> + if (phy->index == 0) {
> + val = readl(data->base + REG_PHY_UNK_H3);
> + writel(val & ~1, data->base + REG_PHY_UNK_H3);
> + }
> +
> + val = readl(phy->pmu + REG_PMU_UNK_H3);
> + writel(val & ~2, phy->pmu + REG_PMU_UNK_H3);
> + } else {
> + /* Enable USB 45 Ohm resistor calibration */
> + if (phy->index == 0)
> + sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
>
> - /* Adjust PHY's magnitude and rate */
> - sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
> + /* Adjust PHY's magnitude and rate */
> + sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
>
> - /* Disconnect threshold adjustment */
> - sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->disc_thresh, 2);
> + /* Disconnect threshold adjustment */
> + sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
> + data->disc_thresh, 2);
> + }
>
> sun4i_usb_phy_passby(phy, 1);
>
> @@ -522,11 +550,14 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
> mutex_init(&data->mutex);
> INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
> dev_set_drvdata(dev, data);
> + data->dev = dev;
>
> if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
> of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
> of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
> data->num_phys = 2;
> + else if (of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
> + data->num_phys = 4;
this should come from driver data.
> else
> data->num_phys = 3;
>
> @@ -538,13 +569,18 @@ static int sun4i_usb_phy_probe(struct platform_device *pdev)
>
> if (of_device_is_compatible(np, "allwinner,sun6i-a31-usb-phy") ||
> of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
> - of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
> + of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy") ||
> + of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
> dedicated_clocks = true;
same here.
> else
> dedicated_clocks = false;
>
> if (of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
> - data->has_a33_phyctl = true;
> + data->type = sun8i_a33_phy;
> + else if (of_device_is_compatible(np, "allwinner,sun8i-h3-usb-phy"))
> + data->type = sun8i_h3_phy;
> + else
> + data->type = sun4i_a10_phy;
this too can come from driver data.
Thanks
Kishon
More information about the linux-arm-kernel
mailing list