diff options
| -rw-r--r-- | Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt | 3 | ||||
| -rw-r--r-- | drivers/usb/musb/sunxi.c | 50 |
2 files changed, 46 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt b/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt index 9254a6c81808..fde180bfb162 100644 --- a/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt +++ b/Documentation/devicetree/bindings/usb/allwinner,sun4i-a10-musb.txt @@ -2,9 +2,10 @@ Allwinner sun4i A10 musb DRC/OTG controller ------------------------------------------- Required properties: - - compatible : "allwinner,sun4i-a10-musb" + - compatible : "allwinner,sun4i-a10-musb" or "allwinner,sun6i-a31-musb" - reg : mmio address range of the musb controller - clocks : clock specifier for the musb controller ahb gate clock + - reset : reset specifier for the ahb reset (A31 and newer only) - interrupts : interrupt to which the musb controller is connected - interrupt-names : must be "mc" - phys : phy specifier for the otg phy diff --git a/drivers/usb/musb/sunxi.c b/drivers/usb/musb/sunxi.c index 00d7248a4840..df2f75eb9895 100644 --- a/drivers/usb/musb/sunxi.c +++ b/drivers/usb/musb/sunxi.c @@ -26,6 +26,7 @@ #include <linux/of.h> #include <linux/phy/phy-sun4i-usb.h> #include <linux/platform_device.h> +#include <linux/reset.h> #include <linux/soc/sunxi/sunxi_sram.h> #include <linux/usb/musb.h> #include <linux/usb/of.h> @@ -70,6 +71,8 @@ #define SUNXI_MUSB_FL_HOSTMODE_PEND 2 #define SUNXI_MUSB_FL_VBUS_ON 3 #define SUNXI_MUSB_FL_PHY_ON 4 +#define SUNXI_MUSB_FL_HAS_SRAM 5 +#define SUNXI_MUSB_FL_HAS_RESET 6 /* Our read/write methods need access and do not get passed in a musb ref :| */ static struct musb *sunxi_musb; @@ -78,6 +81,7 @@ struct sunxi_glue { struct device *dev; struct platform_device *musb; struct clk *clk; + struct reset_control *rst; struct phy *phy; struct platform_device *usb_phy; struct usb_phy *xceiv; @@ -229,14 +233,22 @@ static int sunxi_musb_init(struct musb *musb) musb->phy = glue->phy; musb->xceiv = glue->xceiv; - ret = sunxi_sram_claim(musb->controller->parent); - if (ret) - return ret; + if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) { + ret = sunxi_sram_claim(musb->controller->parent); + if (ret) + return ret; + } ret = clk_prepare_enable(glue->clk); if (ret) goto error_sram_release; + if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) { + ret = reset_control_deassert(glue->rst); + if (ret) + goto error_clk_disable; + } + writeb(SUNXI_MUSB_VEND0_PIO_MODE, musb->mregs + SUNXI_MUSB_VEND0); /* Register notifier before calling phy_init() */ @@ -244,7 +256,7 @@ static int sunxi_musb_init(struct musb *musb) ret = extcon_register_notifier(glue->extcon, EXTCON_USB_HOST, &glue->host_nb); if (ret) - goto error_clk_disable; + goto error_reset_assert; } ret = phy_init(glue->phy); @@ -273,10 +285,14 @@ error_unregister_notifier: if (musb->port_mode == MUSB_PORT_MODE_DUAL_ROLE) extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST, &glue->host_nb); +error_reset_assert: + if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) + reset_control_assert(glue->rst); error_clk_disable: clk_disable_unprepare(glue->clk); error_sram_release: - sunxi_sram_release(musb->controller->parent); + if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) + sunxi_sram_release(musb->controller->parent); return ret; } @@ -296,8 +312,12 @@ static int sunxi_musb_exit(struct musb *musb) extcon_unregister_notifier(glue->extcon, EXTCON_USB_HOST, &glue->host_nb); + if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) + reset_control_assert(glue->rst); + clk_disable_unprepare(glue->clk); - sunxi_sram_release(musb->controller->parent); + if (test_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags)) + sunxi_sram_release(musb->controller->parent); return 0; } @@ -617,6 +637,12 @@ static int sunxi_musb_probe(struct platform_device *pdev) INIT_WORK(&glue->work, sunxi_musb_work); glue->host_nb.notifier_call = sunxi_musb_host_notifier; + if (of_device_is_compatible(np, "allwinner,sun4i-a10-musb")) + set_bit(SUNXI_MUSB_FL_HAS_SRAM, &glue->flags); + + if (of_device_is_compatible(np, "allwinner,sun6i-a31-musb")) + set_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags); + glue->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(glue->clk)) { dev_err(&pdev->dev, "Error getting clock: %ld\n", @@ -624,6 +650,17 @@ static int sunxi_musb_probe(struct platform_device *pdev) return PTR_ERR(glue->clk); } + if (test_bit(SUNXI_MUSB_FL_HAS_RESET, &glue->flags)) { + glue->rst = devm_reset_control_get(&pdev->dev, NULL); + if (IS_ERR(glue->rst)) { + if (PTR_ERR(glue->rst) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_err(&pdev->dev, "Error getting reset %ld\n", + PTR_ERR(glue->rst)); + return PTR_ERR(glue->rst); + } + } + glue->phy = devm_phy_get(&pdev->dev, "usb"); if (IS_ERR(glue->phy)) { if (PTR_ERR(glue->phy) == -EPROBE_DEFER) @@ -685,6 +722,7 @@ static int sunxi_musb_remove(struct platform_device *pdev) static const struct of_device_id sunxi_musb_match[] = { { .compatible = "allwinner,sun4i-a10-musb", }, + { .compatible = "allwinner,sun6i-a31-musb", }, {} }; |