diff options
| author | Emil Renner Berthing <emil.renner.berthing@canonical.com> | 2023-07-22 19:50:49 +0300 |
|---|---|---|
| committer | Emil Renner Berthing <emil.renner.berthing@canonical.com> | 2024-04-13 23:33:33 +0300 |
| commit | 1254440c4178b55c219d463f3d7f342a4ce74a84 (patch) | |
| tree | c64476a829008cb53a3d5c93d53752a69f8164b6 | |
| parent | 72466c8f014770c31a5b8d90aaa6eac71e35e9e4 (diff) | |
| download | linux-1254440c4178b55c219d463f3d7f342a4ce74a84.tar.xz | |
usb: cdns3: starfive: Initialize JH7100 host mode
These settings are directly copied from StarFive's port of u-boot
for the JH7100:
/* config strap */
_SET_SYSCON_REG_SCFG_usb0_mode_strap(0x2);
_SET_SYSCON_REG_SCFG_usb7_PLL_EN(0x1);
_SET_SYSCON_REG_SCFG_usb7_U3_EQ_EN(0x1);
_SET_SYSCON_REG_SCFG_usb7_U3_SSRX_SEL(0x1);
_SET_SYSCON_REG_SCFG_usb7_U3_SSTX_SEL(0x1);
_SET_SYSCON_REG_SCFG_usb3_utmi_iddig(0x1);
Signed-off-by: Emil Renner Berthing <emil.renner.berthing@canonical.com>
| -rw-r--r-- | arch/riscv/boot/dts/starfive/jh7100.dtsi | 6 | ||||
| -rw-r--r-- | drivers/usb/cdns3/cdns3-starfive.c | 43 |
2 files changed, 49 insertions, 0 deletions
diff --git a/arch/riscv/boot/dts/starfive/jh7100.dtsi b/arch/riscv/boot/dts/starfive/jh7100.dtsi index 7fc7bf6b3830..e09b60d2ac81 100644 --- a/arch/riscv/boot/dts/starfive/jh7100.dtsi +++ b/arch/riscv/boot/dts/starfive/jh7100.dtsi @@ -255,6 +255,11 @@ #reset-cells = <1>; }; + sysaudio: syscon@104a0000 { + compatible = "starfive,jh7100-sysaudio", "syscon"; + reg = <0x0 0x104a0000 0x0 0x10000>; + }; + usb3: usb@104c0000 { compatible = "starfive,jh7100-usb"; ranges = <0x0 0x0 0x104c0000 0x100000>; @@ -268,6 +273,7 @@ resets = <&rstgen JH7100_RSTN_USB_AXI>, <&rstgen JH7100_RSTN_USBNOC_AXI>; reset-names = "axi", "nocaxi"; + starfive,syscon = <&sysaudio>; status = "disabled"; usb_cdns3: usb@0 { diff --git a/drivers/usb/cdns3/cdns3-starfive.c b/drivers/usb/cdns3/cdns3-starfive.c index f9907ca0a04a..e1f0299c683f 100644 --- a/drivers/usb/cdns3/cdns3-starfive.c +++ b/drivers/usb/cdns3/cdns3-starfive.c @@ -20,6 +20,19 @@ #include <linux/usb/otg.h> #include "core.h" +#define JH7100_USB0 0x20 +#define JH7100_USB0_MODE_STRAP_MASK GENMASK(2, 0) +#define JH7100_USB0_MODE_STRAP_HOST 2 + +#define JH7100_USB3 0x2c +#define JH7100_USB3_UTMI_IDDIG BIT(21) + +#define JH7100_USB7 0x3c +#define JH7100_USB7_SSRX_SEL BIT(18) +#define JH7100_USB7_SSTX_SEL BIT(19) +#define JH7100_USB7_PLL_EN BIT(23) +#define JH7100_USB7_EQ_EN BIT(25) + #define JH7110_STRAP_HOST BIT(17) #define JH7110_STRAP_DEVICE BIT(18) #define JH7110_STRAP_MASK GENMASK(18, 16) @@ -42,6 +55,36 @@ typedef int (cdns_starfive_mode_init_t)(struct device *dev, struct cdns_starfive static int cdns_jh7100_mode_init(struct device *dev, struct cdns_starfive *data) { + struct regmap *syscon; + enum usb_dr_mode mode; + + syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "starfive,syscon"); + if (IS_ERR(syscon)) + return dev_err_probe(dev, PTR_ERR(syscon), + "failed to get starfive,syscon\n"); + + /* dr mode setting */ + mode = usb_get_dr_mode(dev); + + switch (mode) { + case USB_DR_MODE_HOST: + regmap_update_bits(syscon, JH7100_USB0, + JH7100_USB0_MODE_STRAP_MASK, JH7100_USB0_MODE_STRAP_HOST); + regmap_update_bits(syscon, JH7100_USB7, + JH7100_USB7_PLL_EN, JH7100_USB7_PLL_EN); + regmap_update_bits(syscon, JH7100_USB7, + JH7100_USB7_EQ_EN, JH7100_USB7_EQ_EN); + regmap_update_bits(syscon, JH7100_USB7, + JH7100_USB7_SSRX_SEL, JH7100_USB7_SSRX_SEL); + regmap_update_bits(syscon, JH7100_USB7, + JH7100_USB7_SSTX_SEL, JH7100_USB7_SSTX_SEL); + regmap_update_bits(syscon, JH7100_USB3, + JH7100_USB3_UTMI_IDDIG, JH7100_USB3_UTMI_IDDIG); + break; + default: + break; + } + return 0; } |