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@@ -0,0 +1,201 @@
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+/*
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+ * Copyright (C) 2014 Roman Byshko
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+ *
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+ * Roman Byshko <rbyshko@gmail.com>
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+ *
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+ * Based on code from
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+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
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+ *
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+ * SPDX-License-Identifier: GPL-2.0+
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+ */
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+
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+#include <asm/arch/clock.h>
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+#include <asm/gpio.h>
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+#include <asm/io.h>
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+#include <common.h>
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+#include "ehci.h"
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+
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+#define SUNXI_USB1_IO_BASE 0x01c14000
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+#define SUNXI_USB2_IO_BASE 0x01c1c000
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+
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+#define SUNXI_USB_PMU_IRQ_ENABLE 0x800
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+#define SUNXI_USB_CSR 0x01c13404
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+#define SUNXI_USB_PASSBY_EN 1
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+
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+#define SUNXI_EHCI_AHB_ICHR8_EN (1 << 10)
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+#define SUNXI_EHCI_AHB_INCR4_BURST_EN (1 << 9)
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+#define SUNXI_EHCI_AHB_INCRX_ALIGN_EN (1 << 8)
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+#define SUNXI_EHCI_ULPI_BYPASS_EN (1 << 0)
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+
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+static struct sunxi_ehci_hcd {
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+ struct usb_hcd *hcd;
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+ int usb_rst_mask;
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+ int ahb_clk_mask;
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+ int gpio_vbus;
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+ void *csr;
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+ int irq;
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+ int id;
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+} sunxi_echi_hcd[] = {
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+ {
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+ .usb_rst_mask = CCM_USB_CTRL_PHY1_RST,
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+ .ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
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+ .gpio_vbus = CONFIG_SUNXI_USB_VBUS0_GPIO,
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+ .csr = (void *)SUNXI_USB_CSR,
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+ .irq = 39,
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+ .id = 1,
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+ },
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+#if (CONFIG_USB_MAX_CONTROLLER_COUNT > 1)
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+ {
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+ .usb_rst_mask = CCM_USB_CTRL_PHY2_RST,
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+ .ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI1,
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+ .gpio_vbus = CONFIG_SUNXI_USB_VBUS1_GPIO,
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+ .csr = (void *)SUNXI_USB_CSR,
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+ .irq = 40,
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+ .id = 2,
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+ }
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+#endif
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+};
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+
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+static int enabled_hcd_count;
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+
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+static void *get_io_base(int hcd_id)
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+{
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+ if (hcd_id == 1)
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+ return (void *)SUNXI_USB1_IO_BASE;
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+ else if (hcd_id == 2)
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+ return (void *)SUNXI_USB2_IO_BASE;
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+ else
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+ return NULL;
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+}
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+
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+static void usb_phy_write(struct sunxi_ehci_hcd *sunxi_ehci, int addr,
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+ int data, int len)
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+{
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+ int j = 0, usbc_bit = 0;
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+ void *dest = sunxi_ehci->csr;
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+
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+ usbc_bit = 1 << (sunxi_ehci->id * 2);
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+ for (j = 0; j < len; j++) {
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+ /* set the bit address to be written */
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+ clrbits_le32(dest, 0xff << 8);
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+ setbits_le32(dest, (addr + j) << 8);
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+
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+ clrbits_le32(dest, usbc_bit);
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+ /* set data bit */
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+ if (data & 0x1)
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+ setbits_le32(dest, 1 << 7);
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+ else
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+ clrbits_le32(dest, 1 << 7);
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+
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+ setbits_le32(dest, usbc_bit);
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+
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+ clrbits_le32(dest, usbc_bit);
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+
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+ data >>= 1;
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+ }
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+}
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+
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+static void sunxi_usb_phy_init(struct sunxi_ehci_hcd *sunxi_ehci)
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+{
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+ /* The following comments are machine
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+ * translated from Chinese, you have been warned!
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+ */
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+
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+ /* adjust PHY's magnitude and rate */
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+ usb_phy_write(sunxi_ehci, 0x20, 0x14, 5);
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+
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+ /* threshold adjustment disconnect */
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+#ifdef CONFIG_SUN4I
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+ usb_phy_write(sunxi_ehci, 0x2a, 3, 2);
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+#else
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+ usb_phy_write(sunxi_ehci, 0x2a, 2, 2);
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+#endif
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+
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+ return;
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+}
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+
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+static void sunxi_usb_passby(struct sunxi_ehci_hcd *sunxi_ehci, int enable)
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+{
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+ unsigned long bits = 0;
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+ void *addr = get_io_base(sunxi_ehci->id) + SUNXI_USB_PMU_IRQ_ENABLE;
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+
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+ bits = SUNXI_EHCI_AHB_ICHR8_EN |
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+ SUNXI_EHCI_AHB_INCR4_BURST_EN |
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+ SUNXI_EHCI_AHB_INCRX_ALIGN_EN |
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+ SUNXI_EHCI_ULPI_BYPASS_EN;
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+
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+ if (enable)
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+ setbits_le32(addr, bits);
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+ else
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+ clrbits_le32(addr, bits);
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+
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+ return;
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+}
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+
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+static void sunxi_ehci_enable(struct sunxi_ehci_hcd *sunxi_ehci)
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+{
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+ struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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+
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+ setbits_le32(&ccm->usb_clk_cfg, sunxi_ehci->usb_rst_mask);
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+ setbits_le32(&ccm->ahb_gate0, sunxi_ehci->ahb_clk_mask);
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+
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+ sunxi_usb_phy_init(sunxi_ehci);
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+
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+ sunxi_usb_passby(sunxi_ehci, SUNXI_USB_PASSBY_EN);
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+
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+ gpio_direction_output(sunxi_ehci->gpio_vbus, 1);
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+}
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+
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+static void sunxi_ehci_disable(struct sunxi_ehci_hcd *sunxi_ehci)
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+{
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+ struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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+
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+ gpio_direction_output(sunxi_ehci->gpio_vbus, 0);
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+
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+ sunxi_usb_passby(sunxi_ehci, !SUNXI_USB_PASSBY_EN);
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+
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+ clrbits_le32(&ccm->ahb_gate0, sunxi_ehci->ahb_clk_mask);
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+ clrbits_le32(&ccm->usb_clk_cfg, sunxi_ehci->usb_rst_mask);
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+}
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+
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+int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
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+ struct ehci_hcor **hcor)
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+{
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+ struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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+ struct sunxi_ehci_hcd *sunxi_ehci = &sunxi_echi_hcd[index];
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+
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+ /* enable common PHY only once */
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+ if (index == 0)
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+ setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
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+
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+ sunxi_ehci_enable(sunxi_ehci);
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+
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+ *hccr = get_io_base(sunxi_ehci->id);
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+
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+ *hcor = (struct ehci_hcor *)((uint32_t) *hccr
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+ + HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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+
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+ debug("sunxi-ehci: init hccr %x and hcor %x hc_length %d\n",
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+ (uint32_t)*hccr, (uint32_t)*hcor,
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+ (uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
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+
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+ enabled_hcd_count++;
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+
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+ return 0;
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+}
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+
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+int ehci_hcd_stop(int index)
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+{
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+ struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
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+ struct sunxi_ehci_hcd *sunxi_ehci = &sunxi_echi_hcd[index];
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+
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+ sunxi_ehci_disable(sunxi_ehci);
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+
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+ /* disable common PHY only once, for the last enabled hcd */
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+ if (enabled_hcd_count == 1)
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+ clrbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
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+
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+ enabled_hcd_count--;
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+
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+ return 0;
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+}
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