On Sat, Jan 21, 2023 at 04:54:31PM +0100, Sjoerd Simons wrote: > Add glue code for TI AM62 to the dwc3 driver; Most code adopted from > TI vendor u-boot code. > > Signed-off-by: Sjoerd Simons <sjo...@collabora.com>
After talking with Marek, this should be reworked to go on top of: https://patchwork.ozlabs.org/project/uboot/list/?series=337977&state=* which itself does need a v2, instead of this approach. > --- > > drivers/usb/dwc3/dwc3-generic.c | 102 ++++++++++++++++++++++++++++++++ > 1 file changed, 102 insertions(+) > > diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c > index 78966718d01..cab7b2e928d 100644 > --- a/drivers/usb/dwc3/dwc3-generic.c > +++ b/drivers/usb/dwc3/dwc3-generic.c > @@ -11,6 +11,7 @@ > #include <cpu_func.h> > #include <log.h> > #include <dm.h> > +#include <dm/device_compat.h> > #include <dm/device-internal.h> > #include <dm/lists.h> > #include <dwc3-uboot.h> > @@ -23,7 +24,9 @@ > #include <usb.h> > #include "core.h" > #include "gadget.h" > +#include <regmap.h> > #include <reset.h> > +#include <syscon.h> > #include <clk.h> > #include <usb/xhci.h> > #include <asm/gpio.h> > @@ -398,6 +401,104 @@ struct dwc3_glue_ops ti_ops = { > .glue_configure = dwc3_ti_glue_configure, > }; > > +void dwc3_ti_am62_glue_configure(struct udevice *dev, int index, > + enum usb_dr_mode mode) > +{ > +#define USBSS_MODE_CONTROL 0x1c > +#define USBSS_PHY_CONFIG 0x8 > +#define USBSS_PHY_VBUS_SEL_MASK GENMASK(2, 1) > +#define USBSS_PHY_VBUS_SEL_SHIFT 1 > +#define USBSS_MODE_VALID BIT(0) > +#define PHY_PLL_REFCLK_MASK GENMASK(3, 0) > +static const int dwc3_ti_am62_rate_table[] = { /* in KHZ */ > + 9600, > + 10000, > + 12000, > + 19200, > + 20000, > + 24000, > + 25000, > + 26000, > + 38400, > + 40000, > + 58000, > + 50000, > + 52000, > +}; > + > + struct clk usb2_refclk; > + int rate_code, i, ret; > + unsigned long rate; > + u32 reg; > + void *usbss; > + bool vbus_divider; > + struct regmap *syscon; > + struct ofnode_phandle_args args; > + > + usbss = dev_remap_addr_index(dev, 0); > + if (IS_ERR(usbss)) { > + dev_err(dev, "can't map IOMEM resource\n"); > + return; > + } > + > + ret = clk_get_by_name(dev, "ref", &usb2_refclk); > + if (ret) { > + dev_err(dev, "can't get usb2_refclk\n"); > + return; > + } > + > + /* Calcuate the rate code */ > + rate = clk_get_rate(&usb2_refclk); > + rate /= 1000; /* To KHz */ > + for (i = 0; i < ARRAY_SIZE(dwc3_ti_am62_rate_table); i++) { > + if (dwc3_ti_am62_rate_table[i] == rate) > + break; > + } > + > + if (i == ARRAY_SIZE(dwc3_ti_am62_rate_table)) { > + dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate); > + return; > + } > + > + rate_code = i; > + > + /* Read the syscon property */ > + syscon = syscon_regmap_lookup_by_phandle(dev, > "ti,syscon-phy-pll-refclk"); > + if (IS_ERR(syscon)) { > + dev_err(dev, "unable to get ti,syscon-phy-pll-refclk regmap\n"); > + return; > + } > + > + ret = ofnode_parse_phandle_with_args(dev_ofnode(dev), > "ti,syscon-phy-pll-refclk", NULL, 1, > + 0, &args); > + if (ret) > + return; > + > + /* Program PHY PLL refclk by reading syscon property */ > + ret = regmap_update_bits(syscon, args.args[0], PHY_PLL_REFCLK_MASK, > rate_code); > + if (ret) { > + dev_err(dev, "failed to set phy pll reference clock rate\n"); > + return; > + } > + > + /* VBUS divider select */ > + reg = readl(usbss + USBSS_PHY_CONFIG); > + vbus_divider = dev_read_bool(dev, "ti,vbus-divider"); > + if (vbus_divider) > + reg |= 1 << USBSS_PHY_VBUS_SEL_SHIFT; > + > + writel(reg, usbss + USBSS_PHY_CONFIG); > + > + /* Set mode valid */ > + reg = readl(usbss + USBSS_MODE_CONTROL); > + reg |= USBSS_MODE_VALID; > + writel(reg, usbss + USBSS_MODE_CONTROL); > +} > + > +struct dwc3_glue_ops ti_am62_ops = { > + .glue_configure = dwc3_ti_am62_glue_configure, > +}; > + > static int dwc3_glue_bind(struct udevice *parent) > { > ofnode node; > @@ -570,6 +671,7 @@ static const struct udevice_id dwc3_glue_ids[] = { > { .compatible = "ti,keystone-dwc3"}, > { .compatible = "ti,dwc3", .data = (ulong)&ti_ops }, > { .compatible = "ti,am437x-dwc3", .data = (ulong)&ti_ops }, > + { .compatible = "ti,am62-usb", .data = (ulong)&ti_am62_ops }, > { .compatible = "ti,am654-dwc3" }, > { .compatible = "rockchip,rk3328-dwc3" }, > { .compatible = "rockchip,rk3399-dwc3" }, -- Tom
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