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 #define to_phy_berlin_usb_priv(p) \
107 container_of((p), struct phy_berlin_usb_priv, phy)
109 static const u32 phy_berlin_pll_dividers
[] = {
111 CLK_REF_DIV(0xc) | FEEDBACK_CLK_DIV(0x54),
113 CLK_REF_DIV(0x6) | FEEDBACK_CLK_DIV(0x55),
116 struct phy_berlin_usb_priv
{
119 struct reset_control
*rst_ctrl
;
123 static int phy_berlin_usb_power_on(struct phy
*phy
)
125 struct phy_berlin_usb_priv
*priv
= dev_get_drvdata(phy
->dev
.parent
);
127 reset_control_reset(priv
->rst_ctrl
);
129 writel(priv
->pll_divider
,
130 priv
->base
+ USB_PHY_PLL
);
131 writel(CLK_STABLE
| PLL_CTRL_REG
| PHASE_OFF_TOL_250
| KVC0_REG_CTRL
|
132 CLK_BLK_EN
, priv
->base
+ USB_PHY_PLL_CONTROL
);
133 writel(V2I_VCO_RATIO(0x5) | R_ROTATE_0
| ANA_TEST_DC_CTRL(0x5),
134 priv
->base
+ USB_PHY_ANALOG
);
135 writel(PHASE_FREEZE_DLY_4_CL
| ACK_LENGTH_16_CL
| SQ_LENGTH_12
|
136 DISCON_THRESHOLD_260
| SQ_THRESHOLD(0xa) | LPF_COEF(0x2) |
137 INTPL_CUR_30
, priv
->base
+ USB_PHY_RX_CTRL
);
139 writel(TX_VDD12_13
| TX_OUT_AMP(0x3), priv
->base
+ USB_PHY_TX_CTRL1
);
140 writel(EXT_HS_RCAL_EN
| IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
141 priv
->base
+ USB_PHY_TX_CTRL0
);
143 writel(EXT_HS_RCAL_EN
| IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4) |
144 EXT_FS_RCAL_DIV(0x2), priv
->base
+ USB_PHY_TX_CTRL0
);
146 writel(EXT_HS_RCAL_EN
| IMPCAL_VTH_DIV(0x3) | EXT_RS_RCAL_DIV(0x4),
147 priv
->base
+ USB_PHY_TX_CTRL0
);
148 writel(TX_CHAN_CTRL_REG(0xf) | DRV_SLEWRATE(0x3) | IMP_CAL_FS_HS_DLY_3
|
149 FS_DRV_EN_MASK(0xd), priv
->base
+ USB_PHY_TX_CTRL2
);
154 static struct phy_ops phy_berlin_usb_ops
= {
155 .power_on
= phy_berlin_usb_power_on
,
156 .owner
= THIS_MODULE
,
159 static const struct of_device_id phy_berlin_sata_of_match
[] = {
161 .compatible
= "marvell,berlin2-usb-phy",
162 .data
= &phy_berlin_pll_dividers
[0],
165 .compatible
= "marvell,berlin2cd-usb-phy",
166 .data
= &phy_berlin_pll_dividers
[1],
170 MODULE_DEVICE_TABLE(of
, phy_berlin_sata_of_match
);
172 static int phy_berlin_usb_probe(struct platform_device
*pdev
)
174 const struct of_device_id
*match
=
175 of_match_device(phy_berlin_sata_of_match
, &pdev
->dev
);
176 struct phy_berlin_usb_priv
*priv
;
177 struct resource
*res
;
178 struct phy_provider
*phy_provider
;
180 priv
= devm_kzalloc(&pdev
->dev
, sizeof(*priv
), GFP_KERNEL
);
184 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
185 priv
->base
= devm_ioremap_resource(&pdev
->dev
, res
);
186 if (IS_ERR(priv
->base
))
187 return PTR_ERR(priv
->base
);
189 priv
->rst_ctrl
= devm_reset_control_get(&pdev
->dev
, NULL
);
190 if (IS_ERR(priv
->rst_ctrl
))
191 return PTR_ERR(priv
->rst_ctrl
);
193 priv
->pll_divider
= *((u32
*)match
->data
);
195 priv
->phy
= devm_phy_create(&pdev
->dev
, NULL
, &phy_berlin_usb_ops
);
196 if (IS_ERR(priv
->phy
)) {
197 dev_err(&pdev
->dev
, "failed to create PHY\n");
198 return PTR_ERR(priv
->phy
);
201 platform_set_drvdata(pdev
, priv
);
204 devm_of_phy_provider_register(&pdev
->dev
, of_phy_simple_xlate
);
205 if (IS_ERR(phy_provider
))
206 return PTR_ERR(phy_provider
);
211 static struct platform_driver phy_berlin_usb_driver
= {
212 .probe
= phy_berlin_usb_probe
,
214 .name
= "phy-berlin-usb",
215 .owner
= THIS_MODULE
,
216 .of_match_table
= phy_berlin_sata_of_match
,
219 module_platform_driver(phy_berlin_usb_driver
);
221 MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>");
222 MODULE_DESCRIPTION("Marvell Berlin PHY driver for USB");
223 MODULE_LICENSE("GPL");