From 0f38672c629b79fa2b929d2c391bc063a08279eb Mon Sep 17 00:00:00 2001 From: Yoshihiro Shimoda Date: Tue, 3 Oct 2017 20:09:14 +0900 Subject: usb: renesas_usbhs: add support for R-Car D3 This patch adds support for R-Car D3. This SoC needs to release the PLL reset by the UGCTRL register. So, since this is not the same as other R-Car Gen3 SoCs, this patch adds a new type as "USBHS_TYPE_RCAR_GEN3_WITH_PLL". Acked-by: Rob Herring Signed-off-by: Yoshihiro Shimoda Signed-off-by: Felipe Balbi --- drivers/usb/renesas_usbhs/common.c | 10 +++++++- drivers/usb/renesas_usbhs/rcar3.c | 48 ++++++++++++++++++++++++++++++++++++++ drivers/usb/renesas_usbhs/rcar3.h | 1 + 3 files changed, 58 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c index 2a860e496b4f..3e92a784c5c3 100644 --- a/drivers/usb/renesas_usbhs/common.c +++ b/drivers/usb/renesas_usbhs/common.c @@ -485,6 +485,10 @@ static const struct of_device_id usbhs_of_match[] = { .compatible = "renesas,usbhs-r8a7796", .data = (void *)USBHS_TYPE_RCAR_GEN3, }, + { + .compatible = "renesas,usbhs-r8a77995", + .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL, + }, { .compatible = "renesas,rcar-gen2-usbhs", .data = (void *)USBHS_TYPE_RCAR_GEN2, @@ -519,7 +523,8 @@ static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev) dparam->enable_gpio = gpio; if (dparam->type == USBHS_TYPE_RCAR_GEN2 || - dparam->type == USBHS_TYPE_RCAR_GEN3) { + dparam->type == USBHS_TYPE_RCAR_GEN3 || + dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) { dparam->has_usb_dmac = 1; dparam->pipe_configs = usbhsc_new_pipe; dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe); @@ -584,6 +589,9 @@ static int usbhs_probe(struct platform_device *pdev) case USBHS_TYPE_RCAR_GEN3: priv->pfunc = usbhs_rcar3_ops; break; + case USBHS_TYPE_RCAR_GEN3_WITH_PLL: + priv->pfunc = usbhs_rcar3_with_pll_ops; + break; default: if (!info->platform_callback.get_id) { dev_err(&pdev->dev, "no platform callbacks"); diff --git a/drivers/usb/renesas_usbhs/rcar3.c b/drivers/usb/renesas_usbhs/rcar3.c index 02b67abfc2a1..f436e9d51127 100644 --- a/drivers/usb/renesas_usbhs/rcar3.c +++ b/drivers/usb/renesas_usbhs/rcar3.c @@ -15,24 +15,39 @@ #include "rcar3.h" #define LPSTS 0x102 +#define UGCTRL 0x180 /* 32-bit register */ #define UGCTRL2 0x184 /* 32-bit register */ +#define UGSTS 0x188 /* 32-bit register */ /* Low Power Status register (LPSTS) */ #define LPSTS_SUSPM 0x4000 +/* R-Car D3 only: USB General control register (UGCTRL) */ +#define UGCTRL_PLLRESET 0x00000001 +#define UGCTRL_CONNECT 0x00000004 + /* * USB General control register 2 (UGCTRL2) * Remarks: bit[31:11] and bit[9:6] should be 0 */ #define UGCTRL2_RESERVED_3 0x00000001 /* bit[3:0] should be B'0001 */ +#define UGCTRL2_USB0SEL_HSUSB 0x00000020 #define UGCTRL2_USB0SEL_OTG 0x00000030 #define UGCTRL2_VBUSSEL 0x00000400 +/* R-Car D3 only: USB General status register (UGSTS) */ +#define UGSTS_LOCK 0x00000100 + static void usbhs_write32(struct usbhs_priv *priv, u32 reg, u32 data) { iowrite32(data, priv->base + reg); } +static u32 usbhs_read32(struct usbhs_priv *priv, u32 reg) +{ + return ioread32(priv->base + reg); +} + static int usbhs_rcar3_power_ctrl(struct platform_device *pdev, void __iomem *base, int enable) { @@ -52,6 +67,34 @@ static int usbhs_rcar3_power_ctrl(struct platform_device *pdev, return 0; } +/* R-Car D3 needs to release UGCTRL.PLLRESET */ +static int usbhs_rcar3_power_and_pll_ctrl(struct platform_device *pdev, + void __iomem *base, int enable) +{ + struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); + u32 val; + int timeout = 1000; + + if (enable) { + usbhs_write32(priv, UGCTRL, 0); /* release PLLRESET */ + usbhs_write32(priv, UGCTRL2, UGCTRL2_RESERVED_3 | + UGCTRL2_USB0SEL_HSUSB); + + usbhs_bset(priv, LPSTS, LPSTS_SUSPM, LPSTS_SUSPM); + do { + val = usbhs_read32(priv, UGSTS); + udelay(1); + } while (!(val & UGSTS_LOCK) && timeout--); + usbhs_write32(priv, UGCTRL, UGCTRL_CONNECT); + } else { + usbhs_write32(priv, UGCTRL, 0); + usbhs_bset(priv, LPSTS, LPSTS_SUSPM, 0); + usbhs_write32(priv, UGCTRL, UGCTRL_PLLRESET); + } + + return 0; +} + static int usbhs_rcar3_get_id(struct platform_device *pdev) { return USBHS_GADGET; @@ -61,3 +104,8 @@ const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = { .power_ctrl = usbhs_rcar3_power_ctrl, .get_id = usbhs_rcar3_get_id, }; + +const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops = { + .power_ctrl = usbhs_rcar3_power_and_pll_ctrl, + .get_id = usbhs_rcar3_get_id, +}; diff --git a/drivers/usb/renesas_usbhs/rcar3.h b/drivers/usb/renesas_usbhs/rcar3.h index 5f850b23ff18..7fe98175f94f 100644 --- a/drivers/usb/renesas_usbhs/rcar3.h +++ b/drivers/usb/renesas_usbhs/rcar3.h @@ -1,3 +1,4 @@ #include "common.h" extern const struct renesas_usbhs_platform_callback usbhs_rcar3_ops; +extern const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops; -- cgit v1.2.3-55-g7522