1 // SPDX-License-Identifier: GPL-2.0-only
3 * Samsung SoC USB 1.1/2.0 PHY driver - Exynos 5250 support
5 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
6 * Author: Kamil Debski <k.debski@samsung.com>
9 #include <linux/delay.h>
11 #include <linux/phy/phy.h>
12 #include <linux/regmap.h>
13 #include "phy-samsung-usb2.h"
15 /* Exynos USB PHY registers */
16 #define EXYNOS_5250_REFCLKSEL_CRYSTAL 0x0
17 #define EXYNOS_5250_REFCLKSEL_XO 0x1
18 #define EXYNOS_5250_REFCLKSEL_CLKCORE 0x2
20 #define EXYNOS_5250_FSEL_9MHZ6 0x0
21 #define EXYNOS_5250_FSEL_10MHZ 0x1
22 #define EXYNOS_5250_FSEL_12MHZ 0x2
23 #define EXYNOS_5250_FSEL_19MHZ2 0x3
24 #define EXYNOS_5250_FSEL_20MHZ 0x4
25 #define EXYNOS_5250_FSEL_24MHZ 0x5
26 #define EXYNOS_5250_FSEL_50MHZ 0x7
29 #define EXYNOS_5250_HOSTPHYCTRL0 0x0
31 #define EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL BIT(31)
32 #define EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_SHIFT 19
33 #define EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_MASK \
34 (0x3 << EXYNOS_5250_HOSTPHYCTRL0_REFCLKSEL_SHIFT)
35 #define EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT 16
36 #define EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK \
37 (0x7 << EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT)
38 #define EXYNOS_5250_HOSTPHYCTRL0_TESTBURNIN BIT(11)
39 #define EXYNOS_5250_HOSTPHYCTRL0_RETENABLE BIT(10)
40 #define EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N BIT(9)
41 #define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_MASK (0x3 << 7)
42 #define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_DUAL (0x0 << 7)
43 #define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_ID0 (0x1 << 7)
44 #define EXYNOS_5250_HOSTPHYCTRL0_VATESTENB_ANALOGTEST (0x2 << 7)
45 #define EXYNOS_5250_HOSTPHYCTRL0_SIDDQ BIT(6)
46 #define EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP BIT(5)
47 #define EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND BIT(4)
48 #define EXYNOS_5250_HOSTPHYCTRL0_WORDINTERFACE BIT(3)
49 #define EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST BIT(2)
50 #define EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST BIT(1)
51 #define EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST BIT(0)
54 #define EXYNOS_5250_HSICPHYCTRL1 0x10
55 #define EXYNOS_5250_HSICPHYCTRL2 0x20
57 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_MASK (0x3 << 23)
58 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT (0x2 << 23)
59 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_MASK (0x7f << 16)
60 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12 (0x24 << 16)
61 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_15 (0x1c << 16)
62 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_16 (0x1a << 16)
63 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_19_2 (0x15 << 16)
64 #define EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_20 (0x14 << 16)
65 #define EXYNOS_5250_HSICPHYCTRLX_SIDDQ BIT(6)
66 #define EXYNOS_5250_HSICPHYCTRLX_FORCESLEEP BIT(5)
67 #define EXYNOS_5250_HSICPHYCTRLX_FORCESUSPEND BIT(4)
68 #define EXYNOS_5250_HSICPHYCTRLX_WORDINTERFACE BIT(3)
69 #define EXYNOS_5250_HSICPHYCTRLX_UTMISWRST BIT(2)
70 #define EXYNOS_5250_HSICPHYCTRLX_PHYSWRST BIT(0)
73 #define EXYNOS_5250_HOSTEHCICTRL 0x30
74 #define EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN BIT(29)
75 #define EXYNOS_5250_HOSTEHCICTRL_ENAINCR4 BIT(28)
76 #define EXYNOS_5250_HOSTEHCICTRL_ENAINCR8 BIT(27)
77 #define EXYNOS_5250_HOSTEHCICTRL_ENAINCR16 BIT(26)
78 #define EXYNOS_5250_HOSTEHCICTRL_AUTOPPDONOVRCUREN BIT(25)
79 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT 19
80 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_MASK \
81 (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT)
82 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_SHIFT 13
83 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_MASK \
84 (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL1_SHIFT)
85 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL2_SHIFT 7
86 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_MASK \
87 (0x3f << EXYNOS_5250_HOSTEHCICTRL_FLADJVAL0_SHIFT)
88 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_SHIFT 1
89 #define EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_MASK \
90 (0x1 << EXYNOS_5250_HOSTEHCICTRL_FLADJVALHOST_SHIFT)
91 #define EXYNOS_5250_HOSTEHCICTRL_SIMULATIONMODE BIT(0)
94 #define EXYNOS_5250_HOSTOHCICTRL 0x34
95 #define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_SHIFT 1
96 #define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_MASK \
97 (0x3ff << EXYNOS_5250_HOSTOHCICTRL_FRAMELENVAL_SHIFT)
98 #define EXYNOS_5250_HOSTOHCICTRL_FRAMELENVALEN BIT(0)
101 #define EXYNOS_5250_USBOTGSYS 0x38
102 #define EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET BIT(14)
103 #define EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG BIT(13)
104 #define EXYNOS_5250_USBOTGSYS_PHY_SW_RST BIT(12)
105 #define EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT 9
106 #define EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK \
107 (0x3 << EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT)
108 #define EXYNOS_5250_USBOTGSYS_ID_PULLUP BIT(8)
109 #define EXYNOS_5250_USBOTGSYS_COMMON_ON BIT(7)
110 #define EXYNOS_5250_USBOTGSYS_FSEL_SHIFT 4
111 #define EXYNOS_5250_USBOTGSYS_FSEL_MASK \
112 (0x3 << EXYNOS_5250_USBOTGSYS_FSEL_SHIFT)
113 #define EXYNOS_5250_USBOTGSYS_FORCE_SLEEP BIT(3)
114 #define EXYNOS_5250_USBOTGSYS_OTGDISABLE BIT(2)
115 #define EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG BIT(1)
116 #define EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND BIT(0)
118 /* Isolation, configured in the power management unit */
119 #define EXYNOS_5250_USB_ISOL_OTG_OFFSET 0x704
120 #define EXYNOS_5250_USB_ISOL_OTG BIT(0)
121 #define EXYNOS_5250_USB_ISOL_HOST_OFFSET 0x708
122 #define EXYNOS_5250_USB_ISOL_HOST BIT(0)
124 /* Mode swtich register */
125 #define EXYNOS_5250_MODE_SWITCH_OFFSET 0x230
126 #define EXYNOS_5250_MODE_SWITCH_MASK 1
127 #define EXYNOS_5250_MODE_SWITCH_DEVICE 0
128 #define EXYNOS_5250_MODE_SWITCH_HOST 1
130 enum exynos4x12_phy_id
{
139 * exynos5250_rate_to_clk() converts the supplied clock rate to the value that
140 * can be written to the phy register.
142 static int exynos5250_rate_to_clk(unsigned long rate
, u32
*reg
)
144 /* EXYNOS_5250_FSEL_MASK */
148 *reg
= EXYNOS_5250_FSEL_9MHZ6
;
151 *reg
= EXYNOS_5250_FSEL_10MHZ
;
154 *reg
= EXYNOS_5250_FSEL_12MHZ
;
157 *reg
= EXYNOS_5250_FSEL_19MHZ2
;
160 *reg
= EXYNOS_5250_FSEL_20MHZ
;
163 *reg
= EXYNOS_5250_FSEL_24MHZ
;
166 *reg
= EXYNOS_5250_FSEL_50MHZ
;
175 static void exynos5250_isol(struct samsung_usb2_phy_instance
*inst
, bool on
)
177 struct samsung_usb2_phy_driver
*drv
= inst
->drv
;
181 switch (inst
->cfg
->id
) {
182 case EXYNOS5250_DEVICE
:
183 offset
= EXYNOS_5250_USB_ISOL_OTG_OFFSET
;
184 mask
= EXYNOS_5250_USB_ISOL_OTG
;
186 case EXYNOS5250_HOST
:
187 offset
= EXYNOS_5250_USB_ISOL_HOST_OFFSET
;
188 mask
= EXYNOS_5250_USB_ISOL_HOST
;
194 regmap_update_bits(drv
->reg_pmu
, offset
, mask
, on
? 0 : mask
);
197 static int exynos5250_power_on(struct samsung_usb2_phy_instance
*inst
)
199 struct samsung_usb2_phy_driver
*drv
= inst
->drv
;
206 switch (inst
->cfg
->id
) {
207 case EXYNOS5250_DEVICE
:
208 regmap_update_bits(drv
->reg_sys
,
209 EXYNOS_5250_MODE_SWITCH_OFFSET
,
210 EXYNOS_5250_MODE_SWITCH_MASK
,
211 EXYNOS_5250_MODE_SWITCH_DEVICE
);
213 /* OTG configuration */
214 otg
= readl(drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
216 otg
&= ~EXYNOS_5250_USBOTGSYS_FSEL_MASK
;
217 otg
|= drv
->ref_reg_val
<< EXYNOS_5250_USBOTGSYS_FSEL_SHIFT
;
219 otg
&= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND
|
220 EXYNOS_5250_USBOTGSYS_FORCE_SLEEP
|
221 EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG
);
222 otg
|= EXYNOS_5250_USBOTGSYS_PHY_SW_RST
|
223 EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET
|
224 EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG
|
225 EXYNOS_5250_USBOTGSYS_OTGDISABLE
;
227 otg
&= ~EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK
;
228 otg
|= EXYNOS_5250_REFCLKSEL_CLKCORE
<<
229 EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT
;
230 writel(otg
, drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
232 otg
&= ~(EXYNOS_5250_USBOTGSYS_PHY_SW_RST
|
233 EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG
|
234 EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET
|
235 EXYNOS_5250_USBOTGSYS_OTGDISABLE
);
236 writel(otg
, drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
240 case EXYNOS5250_HOST
:
241 case EXYNOS5250_HSIC0
:
242 case EXYNOS5250_HSIC1
:
243 /* Host registers configuration */
244 ctrl0
= readl(drv
->reg_phy
+ EXYNOS_5250_HOSTPHYCTRL0
);
246 ctrl0
&= ~EXYNOS_5250_HOSTPHYCTRL0_FSEL_MASK
;
247 ctrl0
|= drv
->ref_reg_val
<<
248 EXYNOS_5250_HOSTPHYCTRL0_FSEL_SHIFT
;
251 ctrl0
&= ~(EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST
|
252 EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL
|
253 EXYNOS_5250_HOSTPHYCTRL0_SIDDQ
|
254 EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND
|
255 EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP
);
256 ctrl0
|= EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST
|
257 EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST
|
258 EXYNOS_5250_HOSTPHYCTRL0_COMMON_ON_N
;
259 writel(ctrl0
, drv
->reg_phy
+ EXYNOS_5250_HOSTPHYCTRL0
);
261 ctrl0
&= ~(EXYNOS_5250_HOSTPHYCTRL0_LINKSWRST
|
262 EXYNOS_5250_HOSTPHYCTRL0_UTMISWRST
);
263 writel(ctrl0
, drv
->reg_phy
+ EXYNOS_5250_HOSTPHYCTRL0
);
265 /* OTG configuration */
266 otg
= readl(drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
268 otg
&= ~EXYNOS_5250_USBOTGSYS_FSEL_MASK
;
269 otg
|= drv
->ref_reg_val
<< EXYNOS_5250_USBOTGSYS_FSEL_SHIFT
;
271 otg
&= ~(EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND
|
272 EXYNOS_5250_USBOTGSYS_FORCE_SLEEP
|
273 EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG
);
274 otg
|= EXYNOS_5250_USBOTGSYS_PHY_SW_RST
|
275 EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET
|
276 EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG
|
277 EXYNOS_5250_USBOTGSYS_OTGDISABLE
;
279 otg
&= ~EXYNOS_5250_USBOTGSYS_REFCLKSEL_MASK
;
280 otg
|= EXYNOS_5250_REFCLKSEL_CLKCORE
<<
281 EXYNOS_5250_USBOTGSYS_REFCLKSEL_SHIFT
;
282 writel(otg
, drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
284 otg
&= ~(EXYNOS_5250_USBOTGSYS_PHY_SW_RST
|
285 EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG
|
286 EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET
);
288 /* HSIC phy configuration */
289 hsic
= (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12
|
290 EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT
|
291 EXYNOS_5250_HSICPHYCTRLX_PHYSWRST
);
292 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL1
);
293 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL2
);
295 hsic
&= ~EXYNOS_5250_HSICPHYCTRLX_PHYSWRST
;
296 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL1
);
297 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL2
);
298 /* The following delay is necessary for the reset sequence to be
302 /* Enable EHCI DMA burst */
303 ehci
= readl(drv
->reg_phy
+ EXYNOS_5250_HOSTEHCICTRL
);
304 ehci
|= EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN
|
305 EXYNOS_5250_HOSTEHCICTRL_ENAINCR4
|
306 EXYNOS_5250_HOSTEHCICTRL_ENAINCR8
|
307 EXYNOS_5250_HOSTEHCICTRL_ENAINCR16
;
308 writel(ehci
, drv
->reg_phy
+ EXYNOS_5250_HOSTEHCICTRL
);
311 ohci
= readl(drv
->reg_phy
+ EXYNOS_5250_HOSTOHCICTRL
);
312 /* Following code is based on the old driver */
314 writel(ohci
, drv
->reg_phy
+ EXYNOS_5250_HOSTOHCICTRL
);
318 exynos5250_isol(inst
, 0);
323 static int exynos5250_power_off(struct samsung_usb2_phy_instance
*inst
)
325 struct samsung_usb2_phy_driver
*drv
= inst
->drv
;
330 exynos5250_isol(inst
, 1);
332 switch (inst
->cfg
->id
) {
333 case EXYNOS5250_DEVICE
:
334 otg
= readl(drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
335 otg
|= (EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND
|
336 EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG
|
337 EXYNOS_5250_USBOTGSYS_FORCE_SLEEP
);
338 writel(otg
, drv
->reg_phy
+ EXYNOS_5250_USBOTGSYS
);
340 case EXYNOS5250_HOST
:
341 ctrl0
= readl(drv
->reg_phy
+ EXYNOS_5250_HOSTPHYCTRL0
);
342 ctrl0
|= (EXYNOS_5250_HOSTPHYCTRL0_SIDDQ
|
343 EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND
|
344 EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP
|
345 EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST
|
346 EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL
);
347 writel(ctrl0
, drv
->reg_phy
+ EXYNOS_5250_HOSTPHYCTRL0
);
349 case EXYNOS5250_HSIC0
:
350 case EXYNOS5250_HSIC1
:
351 hsic
= (EXYNOS_5250_HSICPHYCTRLX_REFCLKDIV_12
|
352 EXYNOS_5250_HSICPHYCTRLX_REFCLKSEL_DEFAULT
|
353 EXYNOS_5250_HSICPHYCTRLX_SIDDQ
|
354 EXYNOS_5250_HSICPHYCTRLX_FORCESLEEP
|
355 EXYNOS_5250_HSICPHYCTRLX_FORCESUSPEND
357 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL1
);
358 writel(hsic
, drv
->reg_phy
+ EXYNOS_5250_HSICPHYCTRL2
);
366 static const struct samsung_usb2_common_phy exynos5250_phys
[] = {
369 .id
= EXYNOS5250_DEVICE
,
370 .power_on
= exynos5250_power_on
,
371 .power_off
= exynos5250_power_off
,
375 .id
= EXYNOS5250_HOST
,
376 .power_on
= exynos5250_power_on
,
377 .power_off
= exynos5250_power_off
,
381 .id
= EXYNOS5250_HSIC0
,
382 .power_on
= exynos5250_power_on
,
383 .power_off
= exynos5250_power_off
,
387 .id
= EXYNOS5250_HSIC1
,
388 .power_on
= exynos5250_power_on
,
389 .power_off
= exynos5250_power_off
,
393 const struct samsung_usb2_phy_config exynos5250_usb2_phy_config
= {
394 .has_mode_switch
= 1,
395 .num_phys
= EXYNOS5250_NUM_PHYS
,
396 .phys
= exynos5250_phys
,
397 .rate_to_clk
= exynos5250_rate_to_clk
,