2 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
3 * Copyright (C) 2010 Freescale Semiconductor, Inc.
5 * SPDX-License-Identifier: GPL-2.0+
11 #include <linux/compiler.h>
12 #include <usb/ehci-fsl.h>
14 #include <asm/arch/imx-regs.h>
15 #include <asm/arch/clock.h>
16 #include <asm/imx-common/iomux-v3.h>
20 #define USB_OTGREGS_OFFSET 0x000
21 #define USB_H1REGS_OFFSET 0x200
22 #define USB_H2REGS_OFFSET 0x400
23 #define USB_H3REGS_OFFSET 0x600
24 #define USB_OTHERREGS_OFFSET 0x800
26 #define USB_H1_CTRL_OFFSET 0x04
28 #define USBPHY_CTRL 0x00000030
29 #define USBPHY_CTRL_SET 0x00000034
30 #define USBPHY_CTRL_CLR 0x00000038
31 #define USBPHY_CTRL_TOG 0x0000003c
33 #define USBPHY_PWD 0x00000000
34 #define USBPHY_CTRL_SFTRST 0x80000000
35 #define USBPHY_CTRL_CLKGATE 0x40000000
36 #define USBPHY_CTRL_ENUTMILEVEL3 0x00008000
37 #define USBPHY_CTRL_ENUTMILEVEL2 0x00004000
38 #define USBPHY_CTRL_OTG_ID 0x08000000
40 #define ANADIG_USB2_CHRG_DETECT_EN_B 0x00100000
41 #define ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B 0x00080000
43 #define ANADIG_USB2_PLL_480_CTRL_BYPASS 0x00010000
44 #define ANADIG_USB2_PLL_480_CTRL_ENABLE 0x00002000
45 #define ANADIG_USB2_PLL_480_CTRL_POWER 0x00001000
46 #define ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS 0x00000040
48 #define USBNC_OFFSET 0x200
49 #define USBNC_PHYSTATUS_ID_DIG (1 << 4) /* otg_id status */
50 #define USBNC_PHYCFG2_ACAENB (1 << 4) /* otg_id detection enable */
51 #define UCTRL_PM (1 << 9) /* OTG Power Mask */
52 #define UCTRL_OVER_CUR_POL (1 << 8) /* OTG Polarity of Overcurrent */
53 #define UCTRL_OVER_CUR_DIS (1 << 7) /* Disable OTG Overcurrent Detection */
56 #define UCMD_RUN_STOP (1 << 0) /* controller run/stop */
57 #define UCMD_RESET (1 << 1) /* controller reset */
59 #if defined(CONFIG_MX6)
60 static const unsigned phy_bases[] = {
65 static void usb_internal_phy_clock_gate(int index, int on)
67 void __iomem *phy_reg;
69 if (index >= ARRAY_SIZE(phy_bases))
72 phy_reg = (void __iomem *)phy_bases[index];
73 phy_reg += on ? USBPHY_CTRL_CLR : USBPHY_CTRL_SET;
74 writel(USBPHY_CTRL_CLKGATE, phy_reg);
77 static void usb_power_config(int index)
79 struct anatop_regs __iomem *anatop =
80 (struct anatop_regs __iomem *)ANATOP_BASE_ADDR;
81 void __iomem *chrg_detect;
82 void __iomem *pll_480_ctrl_clr;
83 void __iomem *pll_480_ctrl_set;
87 chrg_detect = &anatop->usb1_chrg_detect;
88 pll_480_ctrl_clr = &anatop->usb1_pll_480_ctrl_clr;
89 pll_480_ctrl_set = &anatop->usb1_pll_480_ctrl_set;
92 chrg_detect = &anatop->usb2_chrg_detect;
93 pll_480_ctrl_clr = &anatop->usb2_pll_480_ctrl_clr;
94 pll_480_ctrl_set = &anatop->usb2_pll_480_ctrl_set;
100 * Some phy and power's special controls
101 * 1. The external charger detector needs to be disabled
102 * or the signal at DP will be poor
103 * 2. The PLL's power and output to usb
104 * is totally controlled by IC, so the Software only needs
105 * to enable them at initializtion.
107 writel(ANADIG_USB2_CHRG_DETECT_EN_B |
108 ANADIG_USB2_CHRG_DETECT_CHK_CHRG_B,
111 writel(ANADIG_USB2_PLL_480_CTRL_BYPASS,
114 writel(ANADIG_USB2_PLL_480_CTRL_ENABLE |
115 ANADIG_USB2_PLL_480_CTRL_POWER |
116 ANADIG_USB2_PLL_480_CTRL_EN_USB_CLKS,
120 static int wait_for_bit(u32 *reg, const u32 mask, bool set)
123 const unsigned int timeout = 10000;
124 unsigned long start = get_timer(0);
131 if ((val & mask) == mask)
134 if (get_timer(start) > timeout)
140 debug("%s: Timeout (reg=%p mask=%08x wait_set=%i)\n",
141 __func__, reg, mask, set);
146 /* Return 0 : host node, <>0 : device mode */
147 static int usb_phy_enable(int index, struct usb_ehci *ehci)
149 void __iomem *phy_reg;
150 void __iomem *phy_ctrl;
151 void __iomem *usb_cmd;
154 if (index >= ARRAY_SIZE(phy_bases))
157 phy_reg = (void __iomem *)phy_bases[index];
158 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
159 usb_cmd = (void __iomem *)&ehci->usbcmd;
161 /* Stop then Reset */
162 clrbits_le32(usb_cmd, UCMD_RUN_STOP);
163 ret = wait_for_bit(usb_cmd, UCMD_RUN_STOP, 0);
167 setbits_le32(usb_cmd, UCMD_RESET);
168 ret = wait_for_bit(usb_cmd, UCMD_RESET, 0);
172 /* Reset USBPHY module */
173 setbits_le32(phy_ctrl, USBPHY_CTRL_SFTRST);
176 /* Remove CLKGATE and SFTRST */
177 clrbits_le32(phy_ctrl, USBPHY_CTRL_CLKGATE | USBPHY_CTRL_SFTRST);
180 /* Power up the PHY */
181 writel(0, phy_reg + USBPHY_PWD);
182 /* enable FS/LS device */
183 setbits_le32(phy_ctrl, USBPHY_CTRL_ENUTMILEVEL2 |
184 USBPHY_CTRL_ENUTMILEVEL3);
189 int usb_phy_mode(int port)
191 void __iomem *phy_reg;
192 void __iomem *phy_ctrl;
195 phy_reg = (void __iomem *)phy_bases[port];
196 phy_ctrl = (void __iomem *)(phy_reg + USBPHY_CTRL);
198 val = readl(phy_ctrl);
200 if (val & USBPHY_CTRL_OTG_ID)
201 return USB_INIT_DEVICE;
203 return USB_INIT_HOST;
206 /* Base address for this IP block is 0x02184800 */
208 u32 ctrl[4]; /* otg/host1-3 */
214 #elif defined(CONFIG_MX7)
228 static void usb_power_config(int index)
230 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
231 (0x10000 * index) + USBNC_OFFSET);
232 void __iomem *phy_cfg2 = (void __iomem *)(&usbnc->phy_cfg2);
234 /* Enable usb_otg_id detection */
235 setbits_le32(phy_cfg2, USBNC_PHYCFG2_ACAENB);
238 int usb_phy_mode(int port)
240 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
241 (0x10000 * port) + USBNC_OFFSET);
242 void __iomem *status = (void __iomem *)(&usbnc->phy_status);
247 if (val & USBNC_PHYSTATUS_ID_DIG)
248 return USB_INIT_DEVICE;
250 return USB_INIT_HOST;
254 static void usb_oc_config(int index)
256 #if defined(CONFIG_MX6)
257 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
258 USB_OTHERREGS_OFFSET);
259 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl[index]);
260 #elif defined(CONFIG_MX7)
261 struct usbnc_regs *usbnc = (struct usbnc_regs *)(USB_BASE_ADDR +
262 (0x10000 * index) + USBNC_OFFSET);
263 void __iomem *ctrl = (void __iomem *)(&usbnc->ctrl1);
266 #if CONFIG_MACH_TYPE == MACH_TYPE_MX6Q_ARM2
267 /* mx6qarm2 seems to required a different setting*/
268 clrbits_le32(ctrl, UCTRL_OVER_CUR_POL);
270 setbits_le32(ctrl, UCTRL_OVER_CUR_POL);
273 #if defined(CONFIG_MX6)
274 setbits_le32(ctrl, UCTRL_OVER_CUR_DIS);
275 #elif defined(CONFIG_MX7)
276 setbits_le32(ctrl, UCTRL_OVER_CUR_DIS | UCTRL_PM);
281 * board_ehci_hcd_init - override usb phy mode
282 * @port: usb host/otg port
284 * Target board specific, override usb_phy_mode.
285 * When usb-otg is used as usb host port, iomux pad usb_otg_id can be
286 * left disconnected in this case usb_phy_mode will not be able to identify
287 * the phy mode that usb port is used.
288 * Machine file overrides board_usb_phy_mode.
290 * Return: USB_INIT_DEVICE or USB_INIT_HOST
292 int __weak board_usb_phy_mode(int port)
294 return usb_phy_mode(port);
298 * board_ehci_hcd_init - set usb vbus voltage
299 * @port: usb otg port
301 * Target board specific, setup iomux pad to setup supply vbus voltage
302 * for usb otg port. Machine board file overrides board_ehci_hcd_init
306 int __weak board_ehci_hcd_init(int port)
312 * board_ehci_power - enables/disables usb vbus voltage
313 * @port: usb otg port
314 * @on: on/off vbus voltage
316 * Enables/disables supply vbus voltage for usb otg port.
317 * Machine board file overrides board_ehci_power
321 int __weak board_ehci_power(int port, int on)
326 int ehci_hcd_init(int index, enum usb_init_type init,
327 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
329 enum usb_init_type type;
330 #if defined(CONFIG_MX6)
331 u32 controller_spacing = 0x200;
332 #elif defined(CONFIG_MX7)
333 u32 controller_spacing = 0x10000;
335 struct usb_ehci *ehci = (struct usb_ehci *)(USB_BASE_ADDR +
336 (controller_spacing * index));
340 enable_usboh3_clk(1);
343 /* Do board specific initialization */
344 board_ehci_hcd_init(index);
346 usb_power_config(index);
347 usb_oc_config(index);
349 #if defined(CONFIG_MX6)
350 usb_internal_phy_clock_gate(index, 1);
351 usb_phy_enable(index, ehci);
353 type = board_usb_phy_mode(index);
355 *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
356 *hcor = (struct ehci_hcor *)((uint32_t)*hccr +
357 HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
359 if ((type == init) || (type == USB_INIT_DEVICE))
360 board_ehci_power(index, (type == USB_INIT_DEVICE) ? 0 : 1);
363 if (type == USB_INIT_DEVICE)
366 setbits_le32(&ehci->usbmode, CM_HOST);
367 writel(CONFIG_MXC_USB_PORTSC, &ehci->portsc);
368 setbits_le32(&ehci->portsc, USB_EN);
375 int ehci_hcd_stop(int index)