phy: add support for bcm6368 usbh phy

Signed-off-by: Ã\81lvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 43fb4c9bfd2af44511735fc262193bd12fd14ee2..d3fa9ded2ad73e652ca9c818e764c6bd3c27a596 100644 (file)
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -71,6 +71,12 @@ config BCM6358_USBH_PHY
        help
          Support for the Broadcom MIPS BCM6358 USBH PHY.
 
+config BCM6368_USBH_PHY
+       bool "BCM6368 USBH PHY support"
+       depends on PHY && ARCH_BMIPS
+       help
+         Support for the Broadcom MIPS BCM6368 USBH PHY.
+
 config PIPE3_PHY
        bool "Support omap's PIPE3 PHY"
        depends on PHY && ARCH_OMAP2PLUS

diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 04843fd49beacb51f3f07565d9d6a01ee01ce844..d8239854a3fb250be874b5a7b47e00905fd147b0 100644 (file)
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -9,6 +9,7 @@ obj-$(CONFIG_$(SPL_)PHY) += phy-uclass.o
 obj-$(CONFIG_$(SPL_)NOP_PHY) += nop-phy.o
 obj-$(CONFIG_BCM6348_USBH_PHY) += bcm6348-usbh-phy.o
 obj-$(CONFIG_BCM6358_USBH_PHY) += bcm6358-usbh-phy.o
+obj-$(CONFIG_BCM6368_USBH_PHY) += bcm6368-usbh-phy.o
 obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o
 obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o
 obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o

diff --git a/drivers/phy/bcm6368-usbh-phy.c b/drivers/phy/bcm6368-usbh-phy.c
new file mode 100644 (file)
index 0000000..71abc0f
--- /dev/null
+++ b/drivers/phy/bcm6368-usbh-phy.c
@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2018 Ã\81lvaro Fernández Rojas <noltari@gmail.com>
+ *
+ * Derived from linux/arch/mips/bcm63xx/usb-common.c:
+ *     Copyright 2008 Maxime Bizon <mbizon@freebox.fr>
+ *     Copyright 2013 Florian Fainelli <florian@openwrt.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <dm.h>
+#include <generic-phy.h>
+#include <power-domain.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <dm/device.h>
+
+/* USBH PLL Control register */
+#define USBH_PLL_REG           0x18
+#define USBH_PLL_IDDQ_PWRDN    BIT(9)
+#define USBH_PLL_PWRDN_DELAY   BIT(10)
+
+/* USBH Swap Control register */
+#define USBH_SWAP_REG          0x1c
+#define USBH_SWAP_OHCI_DATA    BIT(0)
+#define USBH_SWAP_OHCI_ENDIAN  BIT(1)
+#define USBH_SWAP_EHCI_DATA    BIT(3)
+#define USBH_SWAP_EHCI_ENDIAN  BIT(4)
+
+/* USBH Setup register */
+#define USBH_SETUP_REG         0x28
+#define USBH_SETUP_IOC         BIT(4)
+#define USBH_SETUP_IPP         BIT(5)
+
+struct bcm6368_usbh_hw {
+       uint32_t setup_clr;
+       uint32_t pll_clr;
+};
+
+struct bcm6368_usbh_priv {
+       const struct bcm6368_usbh_hw *hw;
+       void __iomem *regs;
+};
+
+static int bcm6368_usbh_init(struct phy *phy)
+{
+       struct bcm6368_usbh_priv *priv = dev_get_priv(phy->dev);
+       const struct bcm6368_usbh_hw *hw = priv->hw;
+
+       /* configure to work in native cpu endian */
+       clrsetbits_be32(priv->regs + USBH_SWAP_REG,
+                       USBH_SWAP_EHCI_ENDIAN | USBH_SWAP_OHCI_ENDIAN,
+                       USBH_SWAP_EHCI_DATA | USBH_SWAP_OHCI_DATA);
+
+       /* setup config */
+       if (hw->setup_clr)
+               clrbits_be32(priv->regs + USBH_SETUP_REG, hw->setup_clr);
+
+       setbits_be32(priv->regs + USBH_SETUP_REG, USBH_SETUP_IOC);
+
+       /* enable pll control */
+       if (hw->pll_clr)
+               clrbits_be32(priv->regs + USBH_PLL_REG, hw->pll_clr);
+
+       return 0;
+}
+
+static struct phy_ops bcm6368_usbh_ops = {
+       .init = bcm6368_usbh_init,
+};
+
+static const struct bcm6368_usbh_hw bcm6328_hw = {
+       .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
+       .setup_clr = 0,
+};
+
+static const struct bcm6368_usbh_hw bcm6362_hw = {
+       .pll_clr = 0,
+       .setup_clr = 0,
+};
+
+static const struct bcm6368_usbh_hw bcm6368_hw = {
+       .pll_clr = 0,
+       .setup_clr = 0,
+};
+
+static const struct bcm6368_usbh_hw bcm63268_hw = {
+       .pll_clr = USBH_PLL_IDDQ_PWRDN | USBH_PLL_PWRDN_DELAY,
+       .setup_clr = USBH_SETUP_IPP,
+};
+
+static const struct udevice_id bcm6368_usbh_ids[] = {
+       {
+               .compatible = "brcm,bcm6328-usbh",
+               .data = (ulong)&bcm6328_hw,
+       }, {
+               .compatible = "brcm,bcm6362-usbh",
+               .data = (ulong)&bcm6362_hw,
+       }, {
+               .compatible = "brcm,bcm6368-usbh",
+               .data = (ulong)&bcm6368_hw,
+       }, {
+               .compatible = "brcm,bcm63268-usbh",
+               .data = (ulong)&bcm63268_hw,
+       }, { /* sentinel */ }
+};
+
+static int bcm6368_usbh_probe(struct udevice *dev)
+{
+       struct bcm6368_usbh_priv *priv = dev_get_priv(dev);
+       const struct bcm6368_usbh_hw *hw =
+               (const struct bcm6368_usbh_hw *)dev_get_driver_data(dev);
+#if defined(CONFIG_POWER_DOMAIN)
+       struct power_domain pwr_dom;
+#endif
+       struct reset_ctl rst_ctl;
+       struct clk clk;
+       fdt_addr_t addr;
+       fdt_size_t size;
+       int ret;
+
+       addr = devfdt_get_addr_size_index(dev, 0, &size);
+       if (addr == FDT_ADDR_T_NONE)
+               return -EINVAL;
+
+       priv->regs = ioremap(addr, size);
+       priv->hw = hw;
+
+       /* enable usbh clock */
+       ret = clk_get_by_name(dev, "usbh", &clk);
+       if (ret < 0)
+               return ret;
+
+       ret = clk_enable(&clk);
+       if (ret < 0)
+               return ret;
+
+       ret = clk_free(&clk);
+       if (ret < 0)
+               return ret;
+
+#if defined(CONFIG_POWER_DOMAIN)
+       /* enable power domain */
+       ret = power_domain_get(dev, &pwr_dom);
+       if (ret < 0)
+               return ret;
+
+       ret = power_domain_on(&pwr_dom);
+       if (ret < 0)
+               return ret;
+
+       ret = power_domain_free(&pwr_dom);
+       if (ret < 0)
+               return ret;
+#endif
+
+       /* perform reset */
+       ret = reset_get_by_index(dev, 0, &rst_ctl);
+       if (ret < 0)
+               return ret;
+
+       ret = reset_deassert(&rst_ctl);
+       if (ret < 0)
+               return ret;
+
+       ret = reset_free(&rst_ctl);
+       if (ret < 0)
+               return ret;
+
+       /* enable usb_ref clock */
+       ret = clk_get_by_name(dev, "usb_ref", &clk);
+       if (!ret) {
+               ret = clk_enable(&clk);
+               if (ret < 0)
+                       return ret;
+
+               ret = clk_free(&clk);
+               if (ret < 0)
+                       return ret;
+       }
+
+       mdelay(100);
+
+       return 0;
+}
+
+U_BOOT_DRIVER(bcm6368_usbh) = {
+       .name = "bcm6368-usbh",
+       .id = UCLASS_PHY,
+       .of_match = bcm6368_usbh_ids,
+       .ops = &bcm6368_usbh_ops,
+       .priv_auto_alloc_size = sizeof(struct bcm6368_usbh_priv),
+       .probe = bcm6368_usbh_probe,
+};