2 * Copyright (C) 2014 Marvell Technology Group Ltd.
4 * Antoine Tenart <antoine.tenart@free-electrons.com>
5 * Jisheng Zhang <jszhang@marvell.com>
7 * This file is licensed under the terms of the GNU General Public
8 * License version 2. This program is licensed "as is" without any
9 * warranty of any kind, whether express or implied.
12 #include <linux/gpio.h>
14 #include <linux/module.h>
15 #include <linux/of_device.h>
16 #include <linux/of_gpio.h>
17 #include <linux/phy/phy.h>
18 #include <linux/platform_device.h>
19 #include <linux/reset.h>
21 #define USB_PHY_PLL 0x04
22 #define USB_PHY_PLL_CONTROL 0x08
23 #define USB_PHY_TX_CTRL0 0x10
24 #define USB_PHY_TX_CTRL1 0x14
25 #define USB_PHY_TX_CTRL2 0x18
26 #define USB_PHY_RX_CTRL 0x20
27 #define USB_PHY_ANALOG 0x34
30 #define CLK_REF_DIV(x) ((x) << 4)
31 #define FEEDBACK_CLK_DIV(x) ((x) << 8)
33 /* USB_PHY_PLL_CONTROL */
34 #define CLK_STABLE BIT(0)
35 #define PLL_CTRL_PIN BIT(1)
36 #define PLL_CTRL_REG BIT(2)
38 #define PHASE_OFF_TOL_125 (0x0 << 5)
39 #define PHASE_OFF_TOL_250 BIT(5)
40 #define KVC0_CALIB (0x0 << 9)
41 #define KVC0_REG_CTRL BIT(9)
42 #define KVC0_HIGH (0x0 << 10)
43 #define KVC0_LOW (0x3 << 10)
44 #define CLK_BLK_EN BIT(13)
46 /* USB_PHY_TX_CTRL0 */
47 #define EXT_HS_RCAL_EN BIT(3)
48 #define EXT_FS_RCAL_EN BIT(4)
49 #define IMPCAL_VTH_DIV(x) ((x) << 5)
50 #define EXT_RS_RCAL_DIV(x) ((x) << 8)
51 #define EXT_FS_RCAL_DIV(x) ((x) << 12)
53 /* USB_PHY_TX_CTRL1 */
54 #define TX_VDD15_14 (0x0 << 4)
55 #define TX_VDD15_15 BIT(4)
56 #define TX_VDD15_16 (0x2 << 4)
57 #define TX_VDD15_17 (0x3 << 4)
58 #define TX_VDD12_VDD (0x0 << 6)
59 #define TX_VDD12_11 BIT(6)
60 #define TX_VDD12_12 (0x2 << 6)
61 #define TX_VDD12_13 (0x3 << 6)
62 #define LOW_VDD_EN BIT(8)
63 #define TX_OUT_AMP(x) ((x) << 9)
65 /* USB_PHY_TX_CTRL2 */
66 #define TX_CHAN_CTRL_REG(x) ((x) << 0)
67 #define DRV_SLEWRATE(x) ((x) << 4)
68 #define IMP_CAL_FS_HS_DLY_0 (0x0 << 6)
69 #define IMP_CAL_FS_HS_DLY_1 BIT(6)
70 #define IMP_CAL_FS_HS_DLY_2 (0x2 << 6)
71 #define IMP_CAL_FS_HS_DLY_3 (0x3 << 6)
72 #define FS_DRV_EN_MASK(x) ((x) << 8)
73 #define HS_DRV_EN_MASK(x) ((x) << 12)
76 #define PHASE_FREEZE_DLY_2_CL (0x0 << 0)
77 #define PHASE_FREEZE_DLY_4_CL BIT(0)
78 #define ACK_LENGTH_8_CL (0x0 << 2)
79 #define ACK_LENGTH_12_CL BIT(2)
80 #define ACK_LENGTH_16_CL (0x2 << 2)
81 #define ACK_LENGTH_20_CL (0x3 << 2)
82 #define SQ_LENGTH_3 (0x0 << 4)
83 #define SQ_LENGTH_6 BIT(4)
84 #define SQ_LENGTH_9 (0x2 << 4)
85 #define SQ_LENGTH_12 (0x3 << 4)
86 #define DISCON_THRESHOLD_260 (0x0 << 6)
87 #define DISCON_THRESHOLD_270 BIT(6)
88 #define DISCON_THRESHOLD_280 (0x2 << 6)
89 #define DISCON_THRESHOLD_290 (0x3 << 6)
90 #define SQ_THRESHOLD(x) ((x) << 8)
91 #define LPF_COEF(x) ((x) << 12)
92 #define INTPL_CUR_10 (0x0 << 14)
93 #define INTPL_CUR_20 BIT(14)
94 #define INTPL_CUR_30 (0x2 << 14)
95 #define INTPL_CUR_40 (0x3 << 14)
98 #define ANA_PWR_UP BIT(1)
99 #define ANA_PWR_DOWN BIT(2)
100 #define V2I_VCO_RATIO(x) ((x) << 7)
101 #define R_ROTATE_90 (0x0 << 10)
102 #define R_ROTATE_0 BIT(10)
103 #define MODE_TEST_EN BIT(11)
104 #define ANA_TEST_DC_CTRL(x) ((x) << 12)
106 static const u32 phy_berlin_pll_dividers[] = {
108 CLK_REF_DIV(0x6) | FEEDBACK_CLK_DIV(0x55),
110 CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54),
113 struct phy_berlin_usb_priv {
115 struct reset_control *rst_ctrl;
119 static int phy_berlin_usb_power_on(struct phy *phy)
121 struct phy_berlin_usb_priv *priv = phy_get_drvdata(phy);
123 reset_control_reset(priv->rst_ctrl);
125 writel(priv->pll_divider,
126 priv->base + USB_PHY_PLL);
127 writel(CLK_STABLE | PLL_CTRL_REG | PHASE_OFF_TOL_250 | KVC0_REG_CTRL |
128 CLK_BLK_EN, priv->base + USB_PHY_PLL_CONTROL);
129 writel(V2I_VCO_RATIO(0x5) | R_ROTATE_0 | ANA_TEST_DC_CTRL(0x5),
130 priv->base + USB_PHY_ANALOG);
131 writel(PHASE_FREEZE_DLY_4_CL | ACK_LENGTH_16_CL | SQ_LENGTH_12 |
132 DISCON_THRESHOLD_260 | SQ_THRESHOLD(0xa) | LPF_COEF(0x2) |
133 INTPL_CUR_30, priv->base + USB_PHY_RX_CTRL);
135 writel(TX_VDD12_13 | TX_OUT_AMP(0x3), priv->base + USB_PHY_TX_CTRL1);
136 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
137 priv->base + USB_PHY_TX_CTRL0);
139 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4) |
140 EXT_FS_RCAL_DIV(0x2), priv->base + USB_PHY_TX_CTRL0);
142 writel(EXT_HS_RCAL_EN | IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
143 priv->base + USB_PHY_TX_CTRL0);
144 writel(TX_CHAN_CTRL_REG(0xf) | DRV_SLEWRATE(0x3) | IMP_CAL_FS_HS_DLY_3 |
145 FS_DRV_EN_MASK(0xd), priv->base + USB_PHY_TX_CTRL2);
150 static const struct phy_ops phy_berlin_usb_ops = {
151 .power_on = phy_berlin_usb_power_on,
152 .owner = THIS_MODULE,
155 static const struct of_device_id phy_berlin_usb_of_match[] = {
157 .compatible = "marvell,berlin2-usb-phy",
158 .data = &phy_berlin_pll_dividers[0],
161 .compatible = "marvell,berlin2cd-usb-phy",
162 .data = &phy_berlin_pll_dividers[1],
166 MODULE_DEVICE_TABLE(of, phy_berlin_usb_of_match);
168 static int phy_berlin_usb_probe(struct platform_device *pdev)
170 const struct of_device_id *match =
171 of_match_device(phy_berlin_usb_of_match, &pdev->dev);
172 struct phy_berlin_usb_priv *priv;
173 struct resource *res;
175 struct phy_provider *phy_provider;
177 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
181 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
182 priv->base = devm_ioremap_resource(&pdev->dev, res);
183 if (IS_ERR(priv->base))
184 return PTR_ERR(priv->base);
186 priv->rst_ctrl = devm_reset_control_get(&pdev->dev, NULL);
187 if (IS_ERR(priv->rst_ctrl))
188 return PTR_ERR(priv->rst_ctrl);
190 priv->pll_divider = *((u32 *)match->data);
192 phy = devm_phy_create(&pdev->dev, NULL, &phy_berlin_usb_ops);
194 dev_err(&pdev->dev, "failed to create PHY\n");
198 platform_set_drvdata(pdev, priv);
199 phy_set_drvdata(phy, priv);
202 devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
203 return PTR_ERR_OR_ZERO(phy_provider);
206 static struct platform_driver phy_berlin_usb_driver = {
207 .probe = phy_berlin_usb_probe,
209 .name = "phy-berlin-usb",
210 .of_match_table = phy_berlin_usb_of_match,
213 module_platform_driver(phy_berlin_usb_driver);
215 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
216 MODULE_DESCRIPTION("Marvell Berlin PHY driver for USB");
217 MODULE_LICENSE("GPL");