sunxi: Move usb-controller init code out of ehci-sunxi.c for reuse for otg

Most of the usb-controller init code found in ehci-sunxi.c also is necessary
to init the otg usb controller, so move it to a common place.

While at it also update various #ifdefs / defines for sun8i support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

2 files changed, 230 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/sunxi/Makefile b/arch/arm/cpu/armv7/sunxi/Makefile
index 1e899372c2..1720f7db01 100644
--- a/arch/arm/cpu/armv7/sunxi/Makefile
+++ b/arch/arm/cpu/armv7/sunxi/Makefile
@@ -12,6 +12,7 @@ obj-y	+= board.o
 obj-y	+= clock.o
 obj-y	+= cpu_info.o
 obj-y	+= pinmux.o
+obj-y	+= usbc.o
 obj-$(CONFIG_MACH_SUN6I)	+= prcm.o
 obj-$(CONFIG_MACH_SUN8I)	+= prcm.o
 obj-$(CONFIG_MACH_SUN6I)	+= p2wi.o
diff --git a/arch/arm/cpu/armv7/sunxi/usbc.c b/arch/arm/cpu/armv7/sunxi/usbc.c
new file mode 100644
index 0000000000..621992c3af
--- /dev/null
+++ b/arch/arm/cpu/armv7/sunxi/usbc.c
@@ -0,0 +1,229 @@
+/*
+ * Sunxi usb-controller code shared between the ehci and musb controllers
+ *
+ * Copyright (C) 2014 Roman Byshko
+ *
+ * Roman Byshko <rbyshko@gmail.com>
+ *
+ * Based on code from
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/clock.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/usbc.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <common.h>
+
+#define SUNXI_USB_PMU_IRQ_ENABLE	0x800
+#define SUNXI_USB_CSR			0x404
+#define SUNXI_USB_PASSBY_EN		1
+
+#define SUNXI_EHCI_AHB_ICHR8_EN		(1 << 10)
+#define SUNXI_EHCI_AHB_INCR4_BURST_EN	(1 << 9)
+#define SUNXI_EHCI_AHB_INCRX_ALIGN_EN	(1 << 8)
+#define SUNXI_EHCI_ULPI_BYPASS_EN	(1 << 0)
+
+static struct sunxi_usbc_hcd {
+	struct usb_hcd *hcd;
+	int usb_rst_mask;
+	int ahb_clk_mask;
+	int gpio_vbus;
+	int irq;
+	int id;
+} sunxi_usbc_hcd[] = {
+	{
+		.usb_rst_mask = CCM_USB_CTRL_PHY1_RST | CCM_USB_CTRL_PHY1_CLK,
+		.ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
+#if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I
+		.irq = 72,
+#else
+		.irq = 39,
+#endif
+		.id = 1,
+	},
+#if (CONFIG_USB_MAX_CONTROLLER_COUNT > 1)
+	{
+		.usb_rst_mask = CCM_USB_CTRL_PHY2_RST | CCM_USB_CTRL_PHY2_CLK,
+		.ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI1,
+#ifdef CONFIG_MACH_SUN6I
+		.irq = 74,
+#else
+		.irq = 40,
+#endif
+		.id = 2,
+	}
+#endif
+};
+
+static int enabled_hcd_count;
+
+void *sunxi_usbc_get_io_base(int index)
+{
+	switch (index) {
+	case 0:
+		return (void *)SUNXI_USB0_BASE;
+	case 1:
+		return (void *)SUNXI_USB1_BASE;
+	case 2:
+		return (void *)SUNXI_USB2_BASE;
+	default:
+		return NULL;
+	}
+}
+
+static int get_vbus_gpio(int index)
+{
+	switch (index) {
+	case 1: return sunxi_name_to_gpio(CONFIG_USB1_VBUS_PIN);
+	case 2: return sunxi_name_to_gpio(CONFIG_USB2_VBUS_PIN);
+	}
+	return -1;
+}
+
+static void usb_phy_write(struct sunxi_usbc_hcd *sunxi_usbc, int addr,
+			  int data, int len)
+{
+	int j = 0, usbc_bit = 0;
+	void *dest = sunxi_usbc_get_io_base(0) + SUNXI_USB_CSR;
+
+	usbc_bit = 1 << (sunxi_usbc->id * 2);
+	for (j = 0; j < len; j++) {
+		/* set the bit address to be written */
+		clrbits_le32(dest, 0xff << 8);
+		setbits_le32(dest, (addr + j) << 8);
+
+		clrbits_le32(dest, usbc_bit);
+		/* set data bit */
+		if (data & 0x1)
+			setbits_le32(dest, 1 << 7);
+		else
+			clrbits_le32(dest, 1 << 7);
+
+		setbits_le32(dest, usbc_bit);
+
+		clrbits_le32(dest, usbc_bit);
+
+		data >>= 1;
+	}
+}
+
+static void sunxi_usb_phy_init(struct sunxi_usbc_hcd *sunxi_usbc)
+{
+	/* The following comments are machine
+	 * translated from Chinese, you have been warned!
+	 */
+
+	/* adjust PHY's magnitude and rate */
+	usb_phy_write(sunxi_usbc, 0x20, 0x14, 5);
+
+	/* threshold adjustment disconnect */
+#if defined CONFIG_MACH_SUN4I || defined CONFIG_MACH_SUN6I
+	usb_phy_write(sunxi_usbc, 0x2a, 3, 2);
+#else
+	usb_phy_write(sunxi_usbc, 0x2a, 2, 2);
+#endif
+
+	return;
+}
+
+static void sunxi_usb_passby(struct sunxi_usbc_hcd *sunxi_usbc, int enable)
+{
+	unsigned long bits = 0;
+	void *addr = sunxi_usbc_get_io_base(sunxi_usbc->id) +
+		     SUNXI_USB_PMU_IRQ_ENABLE;
+
+	bits = SUNXI_EHCI_AHB_ICHR8_EN |
+		SUNXI_EHCI_AHB_INCR4_BURST_EN |
+		SUNXI_EHCI_AHB_INCRX_ALIGN_EN |
+		SUNXI_EHCI_ULPI_BYPASS_EN;
+
+	if (enable)
+		setbits_le32(addr, bits);
+	else
+		clrbits_le32(addr, bits);
+
+	return;
+}
+
+int sunxi_usbc_request_resources(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+
+	sunxi_usbc->gpio_vbus = get_vbus_gpio(index);
+	if (sunxi_usbc->gpio_vbus != -1)
+		return gpio_request(sunxi_usbc->gpio_vbus, "usbc_vbus");
+
+	return 0;
+}
+
+int sunxi_usbc_free_resources(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+
+	if (sunxi_usbc->gpio_vbus != -1)
+		return gpio_free(sunxi_usbc->gpio_vbus);
+
+	return 0;
+}
+
+void sunxi_usbc_enable(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+	struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+	/* enable common PHY only once */
+	if (enabled_hcd_count == 0)
+		setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
+
+	setbits_le32(&ccm->usb_clk_cfg, sunxi_usbc->usb_rst_mask);
+	setbits_le32(&ccm->ahb_gate0, sunxi_usbc->ahb_clk_mask);
+#if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I
+	setbits_le32(&ccm->ahb_reset0_cfg, sunxi_usbc->ahb_clk_mask);
+#endif
+
+	sunxi_usb_phy_init(sunxi_usbc);
+
+	sunxi_usb_passby(sunxi_usbc, SUNXI_USB_PASSBY_EN);
+
+	enabled_hcd_count++;
+}
+
+void sunxi_usbc_disable(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+	struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
+
+	sunxi_usb_passby(sunxi_usbc, !SUNXI_USB_PASSBY_EN);
+
+#if defined CONFIG_MACH_SUN6I || defined CONFIG_MACH_SUN8I
+	clrbits_le32(&ccm->ahb_reset0_cfg, sunxi_usbc->ahb_clk_mask);
+#endif
+	clrbits_le32(&ccm->ahb_gate0, sunxi_usbc->ahb_clk_mask);
+	clrbits_le32(&ccm->usb_clk_cfg, sunxi_usbc->usb_rst_mask);
+
+	/* disable common PHY only once, for the last enabled hcd */
+	if (enabled_hcd_count == 1)
+		clrbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
+
+	enabled_hcd_count--;
+}
+
+void sunxi_usbc_vbus_enable(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+
+	if (sunxi_usbc->gpio_vbus != -1)
+		gpio_direction_output(sunxi_usbc->gpio_vbus, 1);
+}
+
+void sunxi_usbc_vbus_disable(int index)
+{
+	struct sunxi_usbc_hcd *sunxi_usbc = &sunxi_usbc_hcd[index - 1];
+
+	if (sunxi_usbc->gpio_vbus != -1)
+		gpio_direction_output(sunxi_usbc->gpio_vbus, 0);
+}