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u-boot/drivers/usb/host/ohci-lpc32xx.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

238 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2008 by NXP Semiconductors
* @Author: Based on code by Kevin Wells
* @Descr: USB driver - Embedded Artists LPC3250 OEM Board support functions
*
* Copyright (c) 2015 Tyco Fire Protection Products.
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <wait_bit.h>
#include <asm/io.h>
#include <asm/arch/cpu.h>
#include <asm/arch/clk.h>
#include <asm/arch/i2c.h>
#include <usb.h>
#include <i2c.h>
/* OTG I2C controller module register structures */
struct otgi2c_regs {
u32 otg_i2c_txrx; /* OTG I2C Tx/Rx Data FIFO */
u32 otg_i2c_stat; /* OTG I2C Status Register */
u32 otg_i2c_ctrl; /* OTG I2C Control Register */
u32 otg_i2c_clk_hi; /* OTG I2C Clock Divider high */
u32 otg_i2c_clk_lo; /* OTG I2C Clock Divider low */
};
/* OTG controller module register structures */
struct otg_regs {
u32 reserved1[64];
u32 otg_int_sts; /* OTG int status register */
u32 otg_int_enab; /* OTG int enable register */
u32 otg_int_set; /* OTG int set register */
u32 otg_int_clr; /* OTG int clear register */
u32 otg_sts_ctrl; /* OTG status/control register */
u32 otg_timer; /* OTG timer register */
u32 reserved2[122];
struct otgi2c_regs otg_i2c;
u32 reserved3[824];
u32 otg_clk_ctrl; /* OTG clock control reg */
u32 otg_clk_sts; /* OTG clock status reg */
};
/* otg_sts_ctrl register definitions */
#define OTG_HOST_EN (1 << 0) /* Enable host mode */
/* otg_clk_ctrl and otg_clk_sts register definitions */
#define OTG_CLK_AHB_EN (1 << 4) /* Enable AHB clock */
#define OTG_CLK_OTG_EN (1 << 3) /* Enable OTG clock */
#define OTG_CLK_I2C_EN (1 << 2) /* Enable I2C clock */
#define OTG_CLK_HOST_EN (1 << 0) /* Enable host clock */
/* ISP1301 USB transceiver I2C registers */
#define MC1_SPEED_REG (1 << 0)
#define MC1_DAT_SE0 (1 << 2)
#define MC1_UART_EN (1 << 6)
#define MC2_SPD_SUSP_CTRL (1 << 1)
#define MC2_BI_DI (1 << 2)
#define MC2_PSW_EN (1 << 6)
#define OTG1_DP_PULLUP (1 << 0)
#define OTG1_DM_PULLUP (1 << 1)
#define OTG1_DP_PULLDOWN (1 << 2)
#define OTG1_DM_PULLDOWN (1 << 3)
#define OTG1_VBUS_DRV (1 << 5)
#define ISP1301_I2C_ADDR CONFIG_USB_ISP1301_I2C_ADDR
#define ISP1301_I2C_MODE_CONTROL_1_SET 0x04
#define ISP1301_I2C_MODE_CONTROL_1_CLR 0x05
#define ISP1301_I2C_MODE_CONTROL_2_SET 0x12
#define ISP1301_I2C_MODE_CONTROL_2_CLR 0x13
#define ISP1301_I2C_OTG_CONTROL_1_SET 0x06
#define ISP1301_I2C_OTG_CONTROL_1_CLR 0x07
#define ISP1301_I2C_INTERRUPT_LATCH_CLR 0x0B
#define ISP1301_I2C_INTERRUPT_FALLING_CLR 0x0D
#define ISP1301_I2C_INTERRUPT_RISING_CLR 0x0F
static struct otg_regs *otg = (struct otg_regs *)USB_BASE;
static struct clk_pm_regs *clk_pwr = (struct clk_pm_regs *)CLK_PM_BASE;
static int isp1301_set_value(struct udevice *dev, int reg, u8 value)
{
#ifndef CONFIG_DM_I2C
return i2c_write(ISP1301_I2C_ADDR, reg, 1, &value, 1);
#else
return dm_i2c_write(dev, reg, &value, 1);
#endif
}
static void isp1301_configure(struct udevice *dev)
{
#ifndef CONFIG_DM_I2C
i2c_set_bus_num(I2C_2);
#endif
/*
* LPC32XX only supports DAT_SE0 USB mode
* This sequence is important
*/
/* Disable transparent UART mode first */
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_1_CLR, MC1_UART_EN);
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_1_CLR, ~MC1_SPEED_REG);
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_1_SET, MC1_SPEED_REG);
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_2_CLR, ~0);
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_2_SET,
MC2_BI_DI | MC2_PSW_EN | MC2_SPD_SUSP_CTRL);
isp1301_set_value(dev, ISP1301_I2C_OTG_CONTROL_1_CLR, ~0);
isp1301_set_value(dev, ISP1301_I2C_MODE_CONTROL_1_SET, MC1_DAT_SE0);
isp1301_set_value(dev, ISP1301_I2C_OTG_CONTROL_1_SET,
OTG1_DM_PULLDOWN | OTG1_DP_PULLDOWN);
isp1301_set_value(dev, ISP1301_I2C_OTG_CONTROL_1_CLR,
OTG1_DM_PULLUP | OTG1_DP_PULLUP);
isp1301_set_value(dev, ISP1301_I2C_INTERRUPT_LATCH_CLR, ~0);
isp1301_set_value(dev, ISP1301_I2C_INTERRUPT_FALLING_CLR, ~0);
isp1301_set_value(dev, ISP1301_I2C_INTERRUPT_RISING_CLR, ~0);
/* Enable usb_need_clk clock after transceiver is initialized */
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBDVND_EN);
}
static int usbpll_setup(void)
{
u32 ret;
/* make sure clocks are disabled */
clrbits_le32(&clk_pwr->usb_ctrl,
CLK_USBCTRL_CLK_EN1 | CLK_USBCTRL_CLK_EN2);
/* start PLL clock input */
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN1);
/* Setup PLL. */
setbits_le32(&clk_pwr->usb_ctrl,
CLK_USBCTRL_FDBK_PLUS1(192 - 1));
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_POSTDIV_2POW(0x01));
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_PWRUP);
ret = wait_for_bit_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_PLL_STS,
true, CONFIG_SYS_HZ, false);
if (ret)
return ret;
/* enable PLL output */
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_CLK_EN2);
return 0;
}
int usb_cpu_init(void)
{
u32 ret;
struct udevice *dev = NULL;
#ifdef CONFIG_DM_I2C
ret = i2c_get_chip_for_busnum(I2C_2, ISP1301_I2C_ADDR, 1, &dev);
if (ret) {
debug("%s: No bus %d\n", __func__, I2C_2);
return ret;
}
#endif
/*
* USB pins routing setup is done by "lpc32xx_usb_init()" and should
* be call by board "board_init()" or "misc_init_r()" functions.
*/
/* enable AHB slave USB clock */
setbits_le32(&clk_pwr->usb_ctrl,
CLK_USBCTRL_HCLK_EN | CLK_USBCTRL_BUS_KEEPER);
/* enable I2C clock */
writel(OTG_CLK_I2C_EN, &otg->otg_clk_ctrl);
ret = wait_for_bit_le32(&otg->otg_clk_sts, OTG_CLK_I2C_EN, true,
CONFIG_SYS_HZ, false);
if (ret)
return ret;
/* Configure ISP1301 */
isp1301_configure(dev);
/* setup USB clocks and PLL */
ret = usbpll_setup();
if (ret)
return ret;
/* enable usb_host_need_clk */
setbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_USBHSTND_EN);
/* enable all needed USB clocks */
const u32 mask = OTG_CLK_AHB_EN | OTG_CLK_OTG_EN |
OTG_CLK_I2C_EN | OTG_CLK_HOST_EN;
writel(mask, &otg->otg_clk_ctrl);
ret = wait_for_bit_le32(&otg->otg_clk_sts, mask, true,
CONFIG_SYS_HZ, false);
if (ret)
return ret;
setbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
isp1301_set_value(dev, ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
return 0;
}
int usb_cpu_stop(void)
{
struct udevice *dev = NULL;
int ret = 0;
#ifdef CONFIG_DM_I2C
ret = i2c_get_chip_for_busnum(I2C_2, ISP1301_I2C_ADDR, 1, &dev);
if (ret) {
debug("%s: No bus %d\n", __func__, I2C_2);
return ret;
}
#endif
/* vbus off */
isp1301_set_value(dev, ISP1301_I2C_OTG_CONTROL_1_SET, OTG1_VBUS_DRV);
clrbits_le32(&otg->otg_sts_ctrl, OTG_HOST_EN);
clrbits_le32(&clk_pwr->usb_ctrl, CLK_USBCTRL_HCLK_EN);
return ret;
}
int usb_cpu_init_fail(void)
{
return usb_cpu_stop();
}
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