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9#include <linux/delay.h>
10#include <linux/io.h>
11#include <linux/phy/phy.h>
12#include "phy-samsung-usb2.h"
13
14
15
16
17#define S5PV210_UPHYPWR 0x0
18
19#define S5PV210_UPHYPWR_PHY0_SUSPEND BIT(0)
20#define S5PV210_UPHYPWR_PHY0_PWR BIT(3)
21#define S5PV210_UPHYPWR_PHY0_OTG_PWR BIT(4)
22#define S5PV210_UPHYPWR_PHY0 ( \
23 S5PV210_UPHYPWR_PHY0_SUSPEND | \
24 S5PV210_UPHYPWR_PHY0_PWR | \
25 S5PV210_UPHYPWR_PHY0_OTG_PWR)
26
27#define S5PV210_UPHYPWR_PHY1_SUSPEND BIT(6)
28#define S5PV210_UPHYPWR_PHY1_PWR BIT(7)
29#define S5PV210_UPHYPWR_PHY1 ( \
30 S5PV210_UPHYPWR_PHY1_SUSPEND | \
31 S5PV210_UPHYPWR_PHY1_PWR)
32
33
34#define S5PV210_UPHYCLK 0x4
35
36#define S5PV210_UPHYCLK_PHYFSEL_MASK (0x3 << 0)
37#define S5PV210_UPHYCLK_PHYFSEL_48MHZ (0x0 << 0)
38#define S5PV210_UPHYCLK_PHYFSEL_24MHZ (0x3 << 0)
39#define S5PV210_UPHYCLK_PHYFSEL_12MHZ (0x2 << 0)
40
41#define S5PV210_UPHYCLK_PHY0_ID_PULLUP BIT(2)
42#define S5PV210_UPHYCLK_PHY0_COMMON_ON BIT(4)
43#define S5PV210_UPHYCLK_PHY1_COMMON_ON BIT(7)
44
45
46#define S5PV210_UPHYRST 0x8
47
48#define S5PV210_URSTCON_PHY0 BIT(0)
49#define S5PV210_URSTCON_OTG_HLINK BIT(1)
50#define S5PV210_URSTCON_OTG_PHYLINK BIT(2)
51#define S5PV210_URSTCON_PHY1_ALL BIT(3)
52#define S5PV210_URSTCON_HOST_LINK_ALL BIT(4)
53
54
55#define S5PV210_USB_ISOL_OFFSET 0x680c
56#define S5PV210_USB_ISOL_DEVICE BIT(0)
57#define S5PV210_USB_ISOL_HOST BIT(1)
58
59
60enum s5pv210_phy_id {
61 S5PV210_DEVICE,
62 S5PV210_HOST,
63 S5PV210_NUM_PHYS,
64};
65
66
67
68
69
70static int s5pv210_rate_to_clk(unsigned long rate, u32 *reg)
71{
72 switch (rate) {
73 case 12 * MHZ:
74 *reg = S5PV210_UPHYCLK_PHYFSEL_12MHZ;
75 break;
76 case 24 * MHZ:
77 *reg = S5PV210_UPHYCLK_PHYFSEL_24MHZ;
78 break;
79 case 48 * MHZ:
80 *reg = S5PV210_UPHYCLK_PHYFSEL_48MHZ;
81 break;
82 default:
83 return -EINVAL;
84 }
85
86 return 0;
87}
88
89static void s5pv210_isol(struct samsung_usb2_phy_instance *inst, bool on)
90{
91 struct samsung_usb2_phy_driver *drv = inst->drv;
92 u32 mask;
93
94 switch (inst->cfg->id) {
95 case S5PV210_DEVICE:
96 mask = S5PV210_USB_ISOL_DEVICE;
97 break;
98 case S5PV210_HOST:
99 mask = S5PV210_USB_ISOL_HOST;
100 break;
101 default:
102 return;
103 }
104
105 regmap_update_bits(drv->reg_pmu, S5PV210_USB_ISOL_OFFSET,
106 mask, on ? 0 : mask);
107}
108
109static void s5pv210_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
110{
111 struct samsung_usb2_phy_driver *drv = inst->drv;
112 u32 rstbits = 0;
113 u32 phypwr = 0;
114 u32 rst;
115 u32 pwr;
116
117 switch (inst->cfg->id) {
118 case S5PV210_DEVICE:
119 phypwr = S5PV210_UPHYPWR_PHY0;
120 rstbits = S5PV210_URSTCON_PHY0;
121 break;
122 case S5PV210_HOST:
123 phypwr = S5PV210_UPHYPWR_PHY1;
124 rstbits = S5PV210_URSTCON_PHY1_ALL |
125 S5PV210_URSTCON_HOST_LINK_ALL;
126 break;
127 }
128
129 if (on) {
130 writel(drv->ref_reg_val, drv->reg_phy + S5PV210_UPHYCLK);
131
132 pwr = readl(drv->reg_phy + S5PV210_UPHYPWR);
133 pwr &= ~phypwr;
134 writel(pwr, drv->reg_phy + S5PV210_UPHYPWR);
135
136 rst = readl(drv->reg_phy + S5PV210_UPHYRST);
137 rst |= rstbits;
138 writel(rst, drv->reg_phy + S5PV210_UPHYRST);
139 udelay(10);
140 rst &= ~rstbits;
141 writel(rst, drv->reg_phy + S5PV210_UPHYRST);
142 } else {
143 pwr = readl(drv->reg_phy + S5PV210_UPHYPWR);
144 pwr |= phypwr;
145 writel(pwr, drv->reg_phy + S5PV210_UPHYPWR);
146 }
147}
148
149static int s5pv210_power_on(struct samsung_usb2_phy_instance *inst)
150{
151 s5pv210_isol(inst, 0);
152 s5pv210_phy_pwr(inst, 1);
153
154 return 0;
155}
156
157static int s5pv210_power_off(struct samsung_usb2_phy_instance *inst)
158{
159 s5pv210_phy_pwr(inst, 0);
160 s5pv210_isol(inst, 1);
161
162 return 0;
163}
164
165static const struct samsung_usb2_common_phy s5pv210_phys[S5PV210_NUM_PHYS] = {
166 [S5PV210_DEVICE] = {
167 .label = "device",
168 .id = S5PV210_DEVICE,
169 .power_on = s5pv210_power_on,
170 .power_off = s5pv210_power_off,
171 },
172 [S5PV210_HOST] = {
173 .label = "host",
174 .id = S5PV210_HOST,
175 .power_on = s5pv210_power_on,
176 .power_off = s5pv210_power_off,
177 },
178};
179
180const struct samsung_usb2_phy_config s5pv210_usb2_phy_config = {
181 .num_phys = ARRAY_SIZE(s5pv210_phys),
182 .phys = s5pv210_phys,
183 .rate_to_clk = s5pv210_rate_to_clk,
184};
185
