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/*
* Copyright (C) 2014 Broadcom Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation version 2.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <arch/io.h>
#include <delay.h>
#include <console/console.h>
#include <soc/cygnus.h>
#define CDRU_USBPHY_CLK_RST_SEL_OFFSET 0x11b4
#define CDRU_USBPHY2_HOST_DEV_SEL_OFFSET 0x11b8
#define CDRU_SPARE_REG_0_OFFSET 0x1238
#define CRMU_USB_PHY_AON_CTRL_OFFSET 0x00028
#define CDRU_USB_DEV_SUSPEND_RESUME_CTRL_OFFSET 0x1210
#define CDRU_USBPHY_P2_STATUS_OFFSET 0x1200
#define CDRU_USB_DEV_SUSPEND_RESUME_CTRL_DISABLE 0
#define PHY2_DEV_HOST_CTRL_SEL_DEVICE 0
#define PHY2_DEV_HOST_CTRL_SEL_HOST 1
#define CDRU_USBPHY_P2_STATUS__USBPHY_ILDO_ON_FLAG 1
#define CDRU_USBPHY_P2_STATUS__USBPHY_PLL_LOCK 0
#define CRMU_USBPHY_P0_AFE_CORERDY_VDDC 1
#define CRMU_USBPHY_P0_RESETB 2
#define CRMU_USBPHY_P1_AFE_CORERDY_VDDC 9
#define CRMU_USBPHY_P1_RESETB 10
#define CRMU_USBPHY_P2_AFE_CORERDY_VDDC 17
#define CRMU_USBPHY_P2_RESETB 18
#define USB2_IDM_IDM_IO_CONTROL_DIRECT_OFFSET 0x0408
#define USB2_IDM_IDM_IO_CONTROL_DIRECT__clk_enable 0
#define USB2_IDM_IDM_RESET_CONTROL_OFFSET 0x0800
#define USB2_IDM_IDM_RESET_CONTROL__RESET 0
#define PLL_LOCK_RETRY_COUNT 1000
#define MAX_REGULATOR_NAME_LEN 25
#define NUM_PHYS 3
struct bcm_phy_instance {
struct phy *generic_phy;
int port;
int host_mode; /* 1 - Host , 0 - device */
int power; /* 1 -powered_on 0 -powered off */
struct regulator *vbus_supply;
};
struct bcm_phy_driver {
void *usbphy_regs;
void *usb2h_idm_regs;
void *usb2d_idm_regs;
int num_phys, idm_host_enabled;
struct bcm_phy_instance instances[NUM_PHYS];
};
static struct bcm_phy_driver phy_driver;
static int bcm_phy_init(struct bcm_phy_instance *instance_ptr)
{
/* Only PORT 2 is capabale of being device and host
* Default setting is device, check if it is set to host */
if (instance_ptr->port == 2) {
if (instance_ptr->host_mode == PHY2_DEV_HOST_CTRL_SEL_HOST)
write32(phy_driver.usbphy_regs + CDRU_USBPHY2_HOST_DEV_SEL_OFFSET,
PHY2_DEV_HOST_CTRL_SEL_HOST);
else
die("usb device mode unsupported\n");
}
return 0;
}
static int bcm_phy_poweron(struct bcm_phy_instance *instance_ptr)
{
int clock_reset_flag = 1;
u32 val;
/* Bring the AFE block out of reset to start powering up the PHY */
val = read32(phy_driver.usbphy_regs + CRMU_USB_PHY_AON_CTRL_OFFSET);
if (instance_ptr->port == 0)
val |= (1 << CRMU_USBPHY_P0_AFE_CORERDY_VDDC);
else if (instance_ptr->port == 1)
val |= (1 << CRMU_USBPHY_P1_AFE_CORERDY_VDDC);
else if (instance_ptr->port == 2)
val |= (1 << CRMU_USBPHY_P2_AFE_CORERDY_VDDC);
write32(phy_driver.usbphy_regs + CRMU_USB_PHY_AON_CTRL_OFFSET, val);
instance_ptr->power = 1;
/* Check if the port 2 is configured for device */
if (instance_ptr->port == 2 &&
instance_ptr->host_mode == PHY2_DEV_HOST_CTRL_SEL_DEVICE)
die("usb device mode unsupported\n");
val = read32(phy_driver.usbphy_regs + CDRU_USBPHY_CLK_RST_SEL_OFFSET);
/* Check if the phy that is configured
* to provide clock and reset is powered on*/
if (val >= 0 && val < phy_driver.num_phys) {
if (phy_driver.instances[val].power == 1)
clock_reset_flag = 0;
}
/* if not set the current phy */
if (clock_reset_flag) {
val = instance_ptr->port;
write32(phy_driver.usbphy_regs + CDRU_USBPHY_CLK_RST_SEL_OFFSET,
val);
}
if (phy_driver.idm_host_enabled != 1) {
/* Enable clock to USB and get the USB out of reset */
setbits_le32(phy_driver.usb2h_idm_regs +
USB2_IDM_IDM_IO_CONTROL_DIRECT_OFFSET,
(1 << USB2_IDM_IDM_IO_CONTROL_DIRECT__clk_enable));
clrbits_le32(phy_driver.usb2h_idm_regs +
USB2_IDM_IDM_RESET_CONTROL_OFFSET,
(1 << USB2_IDM_IDM_RESET_CONTROL__RESET));
phy_driver.idm_host_enabled = 1;
}
return 0;
}
static int bcm_phy_probe(void)
{
int i;
phy_driver.num_phys = NUM_PHYS;
phy_driver.usbphy_regs = (void *)0x0301c000;
phy_driver.usb2h_idm_regs = (void *)0x18115000;
phy_driver.usb2d_idm_regs = (void *)0x18111000;
phy_driver.idm_host_enabled = 0;
/* Shutdown all ports. They can be powered up as required */
clrbits_le32(phy_driver.usbphy_regs + CRMU_USB_PHY_AON_CTRL_OFFSET,
(1 << CRMU_USBPHY_P0_AFE_CORERDY_VDDC) |
(1 << CRMU_USBPHY_P0_RESETB) |
(1 << CRMU_USBPHY_P1_AFE_CORERDY_VDDC) |
(1 << CRMU_USBPHY_P1_RESETB) |
(1 << CRMU_USBPHY_P2_AFE_CORERDY_VDDC) |
(1 << CRMU_USBPHY_P2_RESETB));
for (i = 0; i < phy_driver.num_phys; i++) {
phy_driver.instances[i].port = i;
phy_driver.instances[i].host_mode = PHY2_DEV_HOST_CTRL_SEL_HOST;
}
return 0;
}
void usb_init(void)
{
bcm_phy_probe();
/* currently, we only need thus support port 0 */
bcm_phy_init(&phy_driver.instances[0]);
bcm_phy_poweron(&phy_driver.instances[0]);
printk(BIOS_INFO, "usb phy[%d] is powered on\n", 0);
}
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