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/*
* 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/gpio.h>
#include <asm/io.h>
#include <common.h>
#include "ehci.h"
#define SUNXI_USB1_IO_BASE 0x01c14000
#define SUNXI_USB2_IO_BASE 0x01c1c000
#define SUNXI_USB_PMU_IRQ_ENABLE 0x800
#define SUNXI_USB_CSR 0x01c13404
#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_ehci_hcd {
struct usb_hcd *hcd;
int usb_rst_mask;
int ahb_clk_mask;
int gpio_vbus;
void *csr;
int irq;
int id;
} sunxi_echi_hcd[] = {
{
.usb_rst_mask = CCM_USB_CTRL_PHY1_RST,
.ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
.gpio_vbus = CONFIG_SUNXI_USB_VBUS0_GPIO,
.csr = (void *)SUNXI_USB_CSR,
.irq = 39,
.id = 1,
},
#if (CONFIG_USB_MAX_CONTROLLER_COUNT > 1)
{
.usb_rst_mask = CCM_USB_CTRL_PHY2_RST,
.ahb_clk_mask = 1 << AHB_GATE_OFFSET_USB_EHCI1,
.gpio_vbus = CONFIG_SUNXI_USB_VBUS1_GPIO,
.csr = (void *)SUNXI_USB_CSR,
.irq = 40,
.id = 2,
}
#endif
};
static int enabled_hcd_count;
static void *get_io_base(int hcd_id)
{
if (hcd_id == 1)
return (void *)SUNXI_USB1_IO_BASE;
else if (hcd_id == 2)
return (void *)SUNXI_USB2_IO_BASE;
else
return NULL;
}
static void usb_phy_write(struct sunxi_ehci_hcd *sunxi_ehci, int addr,
int data, int len)
{
int j = 0, usbc_bit = 0;
void *dest = sunxi_ehci->csr;
usbc_bit = 1 << (sunxi_ehci->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_ehci_hcd *sunxi_ehci)
{
/* The following comments are machine
* translated from Chinese, you have been warned!
*/
/* adjust PHY's magnitude and rate */
usb_phy_write(sunxi_ehci, 0x20, 0x14, 5);
/* threshold adjustment disconnect */
#ifdef CONFIG_MACH_SUN4I
usb_phy_write(sunxi_ehci, 0x2a, 3, 2);
#else
usb_phy_write(sunxi_ehci, 0x2a, 2, 2);
#endif
return;
}
static void sunxi_usb_passby(struct sunxi_ehci_hcd *sunxi_ehci, int enable)
{
unsigned long bits = 0;
void *addr = get_io_base(sunxi_ehci->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;
}
static void sunxi_ehci_enable(struct sunxi_ehci_hcd *sunxi_ehci)
{
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
setbits_le32(&ccm->usb_clk_cfg, sunxi_ehci->usb_rst_mask);
setbits_le32(&ccm->ahb_gate0, sunxi_ehci->ahb_clk_mask);
sunxi_usb_phy_init(sunxi_ehci);
sunxi_usb_passby(sunxi_ehci, SUNXI_USB_PASSBY_EN);
gpio_direction_output(sunxi_ehci->gpio_vbus, 1);
}
static void sunxi_ehci_disable(struct sunxi_ehci_hcd *sunxi_ehci)
{
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
gpio_direction_output(sunxi_ehci->gpio_vbus, 0);
sunxi_usb_passby(sunxi_ehci, !SUNXI_USB_PASSBY_EN);
clrbits_le32(&ccm->ahb_gate0, sunxi_ehci->ahb_clk_mask);
clrbits_le32(&ccm->usb_clk_cfg, sunxi_ehci->usb_rst_mask);
}
int ehci_hcd_init(int index, enum usb_init_type init, struct ehci_hccr **hccr,
struct ehci_hcor **hcor)
{
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
struct sunxi_ehci_hcd *sunxi_ehci = &sunxi_echi_hcd[index];
int err;
/* enable common PHY only once */
if (index == 0)
setbits_le32(&ccm->usb_clk_cfg, CCM_USB_CTRL_PHYGATE);
err = gpio_request(sunxi_ehci->gpio_vbus, "ehci_vbus");
if (err)
return err;
sunxi_ehci_enable(sunxi_ehci);
*hccr = get_io_base(sunxi_ehci->id);
*hcor = (struct ehci_hcor *)((uint32_t) *hccr
+ HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
debug("sunxi-ehci: init hccr %x and hcor %x hc_length %d\n",
(uint32_t)*hccr, (uint32_t)*hcor,
(uint32_t)HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
enabled_hcd_count++;
return 0;
}
int ehci_hcd_stop(int index)
{
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
struct sunxi_ehci_hcd *sunxi_ehci = &sunxi_echi_hcd[index];
int err;
sunxi_ehci_disable(sunxi_ehci);
err = gpio_free(sunxi_ehci->gpio_vbus);
if (err)
return err;
/* 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--;
return 0;
}
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