[PATCH v3 2/2] phy-sun4i-usb: Add support for the host usb-phys found on the H3 SoC
Rob Herring
robh at kernel.org
Wed Nov 25 14:11:06 PST 2015
On Wed, Nov 25, 2015 at 05:50:02PM +0100, 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.
Shouldn't the OTG phy have a different compatible string?
>
> 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)
> Changes in v3:
> -Use of_match_node to get model specific config data
> ---
> .../devicetree/bindings/phy/sun4i-usb-phy.txt | 1 +
> drivers/phy/phy-sun4i-usb.c | 46 +++++++++++++++++-----
> 2 files changed, 38 insertions(+), 9 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 1d8f85d..2aed482 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
>
> /*
> * Note do not raise the debounce time, we must report Vusb high within 100ms
> @@ -91,6 +94,7 @@
> enum sun4i_usb_phy_type {
> sun4i_a10_phy,
> sun8i_a33_phy,
> + sun8i_h3_phy,
> };
>
> struct sun4i_usb_phy_cfg {
> @@ -101,6 +105,7 @@ struct sun4i_usb_phy_cfg {
> };
>
> struct sun4i_usb_phy_data {
> + struct device *dev;
> void __iomem *base;
> const struct sun4i_usb_phy_cfg *cfg;
> struct mutex mutex;
> @@ -183,6 +188,9 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
> /* A33 needs us to set phyctl to 0 explicitly */
> writel(0, phyctl);
> 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++) {
> @@ -243,6 +251,7 @@ 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)
> @@ -254,16 +263,26 @@ 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->cfg->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);
> + }
>
> - /* Adjust PHY's magnitude and rate */
> - sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
> + 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);
>
> - /* Disconnect threshold adjustment */
> - sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
> - data->cfg->disc_thresh, 2);
> + /* 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->cfg->disc_thresh, 2);
> + }
>
> sun4i_usb_phy_passby(phy, 1);
>
> @@ -555,6 +574,13 @@ static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
> .dedicated_clocks = true,
> };
>
> +static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
> + .num_phys = 4,
> + .disc_thresh = 3,
> + .type = sun8i_h3_phy,
> + .dedicated_clocks = true,
> +};
> +
> static const struct of_device_id sun4i_usb_phy_of_match[] = {
> { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
> { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
> @@ -562,6 +588,7 @@ static const struct of_device_id sun4i_usb_phy_of_match[] = {
> { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
> { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
> { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
> + { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
> { },
> };
> MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
> @@ -595,6 +622,7 @@ 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;
> data->cfg = match->data;
>
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
> --
> 2.5.0
>
> --
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