#include <dt-bindings/phy/phy.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#define UTMI_REVISION 0x0
#define UTMI_CTRL 0x4
#define UTMI_PLL 0x8
#define UTMI_TX 0xc
#define UTMI_RX 0x10
#define UTMI_IVREF 0x14
#define UTMI_T0 0x18
#define UTMI_T1 0x1c
#define UTMI_T2 0x20
#define UTMI_T3 0x24
#define UTMI_T4 0x28
#define UTMI_T5 0x2c
#define UTMI_RESERVE 0x30
#define UTMI_USB_INT 0x34
#define UTMI_DBG_CTL 0x38
#define UTMI_OTG_ADDON 0x3c
#define UTMI_CTRL_USB_CLK_EN (1 << 31)
#define UTMI_CTRL_SUSPEND_SET1 (1 << 30)
#define UTMI_CTRL_SUSPEND_SET2 (1 << 29)
#define UTMI_CTRL_RXBUF_PDWN (1 << 24)
#define UTMI_CTRL_TXBUF_PDWN (1 << 11)
#define UTMI_CTRL_INPKT_DELAY_SHIFT 30
#define UTMI_CTRL_INPKT_DELAY_SOF_SHIFT 28
#define UTMI_CTRL_PU_REF_SHIFT 20
#define UTMI_CTRL_ARC_PULLDN_SHIFT 12
#define UTMI_CTRL_PLL_PWR_UP_SHIFT 1
#define UTMI_CTRL_PWR_UP_SHIFT 0
#define UTMI_PLL_PLLCALI12_SHIFT 29
#define UTMI_PLL_PLLCALI12_MASK (0x3 << 29)
#define UTMI_PLL_PLLVDD18_SHIFT 27
#define UTMI_PLL_PLLVDD18_MASK (0x3 << 27)
#define UTMI_PLL_PLLVDD12_SHIFT 25
#define UTMI_PLL_PLLVDD12_MASK (0x3 << 25)
#define UTMI_PLL_CLK_BLK_EN_SHIFT 24
#define CLK_BLK_EN (0x1 << 24)
#define PLL_READY (0x1 << 23)
#define KVCO_EXT (0x1 << 22)
#define VCOCAL_START (0x1 << 21)
#define UTMI_PLL_KVCO_SHIFT 15
#define UTMI_PLL_KVCO_MASK (0x7 << 15)
#define UTMI_PLL_ICP_SHIFT 12
#define UTMI_PLL_ICP_MASK (0x7 << 12)
#define UTMI_PLL_FBDIV_SHIFT 4
#define UTMI_PLL_FBDIV_MASK (0xFF << 4)
#define UTMI_PLL_REFDIV_SHIFT 0
#define UTMI_PLL_REFDIV_MASK (0xF << 0)
#define UTMI_TX_REG_EXT_FS_RCAL_SHIFT 27
#define UTMI_TX_REG_EXT_FS_RCAL_MASK (0xf << 27)
#define UTMI_TX_REG_EXT_FS_RCAL_EN_SHIFT 26
#define UTMI_TX_REG_EXT_FS_RCAL_EN_MASK (0x1 << 26)
#define UTMI_TX_TXVDD12_SHIFT 22
#define UTMI_TX_TXVDD12_MASK (0x3 << 22)
#define UTMI_TX_CK60_PHSEL_SHIFT 17
#define UTMI_TX_CK60_PHSEL_MASK (0xf << 17)
#define UTMI_TX_IMPCAL_VTH_SHIFT 14
#define UTMI_TX_IMPCAL_VTH_MASK (0x7 << 14)
#define REG_RCAL_START (0x1 << 12)
#define UTMI_TX_LOW_VDD_EN_SHIFT 11
#define UTMI_TX_AMP_SHIFT 0
#define UTMI_TX_AMP_MASK (0x7 << 0)
#define UTMI_REG_SQ_LENGTH_SHIFT 15
#define UTMI_REG_SQ_LENGTH_MASK (0x3 << 15)
#define UTMI_RX_SQ_THRESH_SHIFT 4
#define UTMI_RX_SQ_THRESH_MASK (0xf << 4)
#define UTMI_OTG_ADDON_OTG_ON (1 << 0)
enum pxa_usb_phy_version {
PXA_USB_PHY_MMP2,
PXA_USB_PHY_PXA910,
PXA_USB_PHY_PXA168,
};
struct pxa_usb_phy {
struct phy *phy;
void __iomem *base;
enum pxa_usb_phy_version version;
};
static unsigned int u2o_get(void __iomem *base, unsigned int offset)
{
return readl_relaxed(base + offset);
}
static void u2o_set(void __iomem *base, unsigned int offset,
unsigned int value)
{
u32 reg;
reg = readl_relaxed(base + offset);
reg |= value;
writel_relaxed(reg, base + offset);
readl_relaxed(base + offset);
}
static void u2o_clear(void __iomem *base, unsigned int offset,
unsigned int value)
{
u32 reg;
reg = readl_relaxed(base + offset);
reg &= ~value;
writel_relaxed(reg, base + offset);
readl_relaxed(base + offset);
}
static void u2o_write(void __iomem *base, unsigned int offset,
unsigned int value)
{
writel_relaxed(value, base + offset);
readl_relaxed(base + offset);
}
static int pxa_usb_phy_init(struct phy *phy)
{
struct pxa_usb_phy *pxa_usb_phy = phy_get_drvdata(phy);
void __iomem *base = pxa_usb_phy->base;
int loops;
dev_info(&phy->dev, "initializing Marvell PXA USB PHY");
if (pxa_usb_phy->version == PXA_USB_PHY_PXA910) {
u2o_set(base, UTMI_CTRL, (1<<UTMI_CTRL_INPKT_DELAY_SOF_SHIFT)
| (1<<UTMI_CTRL_PU_REF_SHIFT));
}
u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK
| UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK
| UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK
| UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK);
u2o_set(base, UTMI_PLL, 0xee<<UTMI_PLL_FBDIV_SHIFT
| 0xb<<UTMI_PLL_REFDIV_SHIFT | 3<<UTMI_PLL_PLLVDD18_SHIFT
| 3<<UTMI_PLL_PLLVDD12_SHIFT | 3<<UTMI_PLL_PLLCALI12_SHIFT
| 1<<UTMI_PLL_ICP_SHIFT | 3<<UTMI_PLL_KVCO_SHIFT);
u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
| UTMI_TX_TXVDD12_MASK | UTMI_TX_CK60_PHSEL_MASK
| UTMI_TX_IMPCAL_VTH_MASK | UTMI_TX_REG_EXT_FS_RCAL_MASK
| UTMI_TX_AMP_MASK);
u2o_set(base, UTMI_TX, 3<<UTMI_TX_TXVDD12_SHIFT
| 4<<UTMI_TX_CK60_PHSEL_SHIFT | 4<<UTMI_TX_IMPCAL_VTH_SHIFT
| 8<<UTMI_TX_REG_EXT_FS_RCAL_SHIFT | 3<<UTMI_TX_AMP_SHIFT);
u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK
| UTMI_REG_SQ_LENGTH_MASK);
u2o_set(base, UTMI_RX, 7<<UTMI_RX_SQ_THRESH_SHIFT
| 2<<UTMI_REG_SQ_LENGTH_SHIFT);
if (pxa_usb_phy->version == PXA_USB_PHY_PXA168) {
u2o_write(base, UTMI_IVREF, 0x4bf);
}
udelay(200);
u2o_set(base, UTMI_PLL, VCOCAL_START);
udelay(40);
u2o_clear(base, UTMI_PLL, VCOCAL_START);
udelay(400);
u2o_set(base, UTMI_TX, REG_RCAL_START);
udelay(40);
u2o_clear(base, UTMI_TX, REG_RCAL_START);
udelay(400);
loops = 0;
while ((u2o_get(base, UTMI_PLL) & PLL_READY) == 0) {
mdelay(1);
loops++;
if (loops > 100) {
dev_warn(&phy->dev, "calibrate timeout, UTMI_PLL %x\n",
u2o_get(base, UTMI_PLL));
break;
}
}
if (pxa_usb_phy->version == PXA_USB_PHY_PXA168) {
u2o_set(base, UTMI_RESERVE, 1 << 5);
u2o_write(base, UTMI_OTG_ADDON, 1);
}
return 0;
}
static int pxa_usb_phy_exit(struct phy *phy)
{
struct pxa_usb_phy *pxa_usb_phy = phy_get_drvdata(phy);
void __iomem *base = pxa_usb_phy->base;
dev_info(&phy->dev, "deinitializing Marvell PXA USB PHY");
if (pxa_usb_phy->version == PXA_USB_PHY_PXA168)
u2o_clear(base, UTMI_OTG_ADDON, UTMI_OTG_ADDON_OTG_ON);
u2o_clear(base, UTMI_CTRL, UTMI_CTRL_RXBUF_PDWN);
u2o_clear(base, UTMI_CTRL, UTMI_CTRL_TXBUF_PDWN);
u2o_clear(base, UTMI_CTRL, UTMI_CTRL_USB_CLK_EN);
u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
return 0;
}
static const struct phy_ops pxa_usb_phy_ops = {
.init = pxa_usb_phy_init,
.exit = pxa_usb_phy_exit,
.owner = THIS_MODULE,
};
static const struct of_device_id pxa_usb_phy_of_match[] = {
{
.compatible = "marvell,mmp2-usb-phy",
.data = (void *)PXA_USB_PHY_MMP2,
}, {
.compatible = "marvell,pxa910-usb-phy",
.data = (void *)PXA_USB_PHY_PXA910,
}, {
.compatible = "marvell,pxa168-usb-phy",
.data = (void *)PXA_USB_PHY_PXA168,
},
{ },
};
MODULE_DEVICE_TABLE(of, pxa_usb_phy_of_match);
static int pxa_usb_phy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct pxa_usb_phy *pxa_usb_phy;
struct phy_provider *provider;
const struct of_device_id *of_id;
pxa_usb_phy = devm_kzalloc(dev, sizeof(struct pxa_usb_phy), GFP_KERNEL);
if (!pxa_usb_phy)
return -ENOMEM;
of_id = of_match_node(pxa_usb_phy_of_match, dev->of_node);
if (of_id)
pxa_usb_phy->version = (uintptr_t)of_id->data;
else
pxa_usb_phy->version = PXA_USB_PHY_MMP2;
pxa_usb_phy->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pxa_usb_phy->base)) {
dev_err(dev, "failed to remap PHY regs\n");
return PTR_ERR(pxa_usb_phy->base);
}
pxa_usb_phy->phy = devm_phy_create(dev, NULL, &pxa_usb_phy_ops);
if (IS_ERR(pxa_usb_phy->phy)) {
dev_err(dev, "failed to create PHY\n");
return PTR_ERR(pxa_usb_phy->phy);
}
phy_set_drvdata(pxa_usb_phy->phy, pxa_usb_phy);
provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
if (IS_ERR(provider)) {
dev_err(dev, "failed to register PHY provider\n");
return PTR_ERR(provider);
}
if (!dev->of_node) {
phy_create_lookup(pxa_usb_phy->phy, "usb", "mv-udc");
phy_create_lookup(pxa_usb_phy->phy, "usb", "pxa-u2oehci");
phy_create_lookup(pxa_usb_phy->phy, "usb", "mv-otg");
}
return 0;
}
static struct platform_driver pxa_usb_phy_driver = {
.probe = pxa_usb_phy_probe,
.driver = {
.name = "pxa-usb-phy",
.of_match_table = pxa_usb_phy_of_match,
},
};
module_platform_driver(pxa_usb_phy_driver);
MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");
MODULE_DESCRIPTION("Marvell PXA USB PHY Driver");
MODULE_LICENSE("GPL v2");
