2 * Allwinner SUNXI "glue layer"
4 * Copyright © 2015 Hans de Goede <hdegoede@redhat.com>
5 * Copyright © 2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
7 * Based on the sw_usb "Allwinner OTG Dual Role Controller" code.
8 * Copyright 2007-2012 (C) Allwinner Technology Co., Ltd.
9 * javen <javen@allwinnertech.com>
11 * Based on the DA8xx "glue layer" code.
12 * Copyright (c) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
13 * Copyright (C) 2005-2006 by Texas Instruments
15 * This file is part of the Inventra Controller Driver for Linux.
17 * The Inventra Controller Driver for Linux is free software; you
18 * can redistribute it and/or modify it under the terms of the GNU
19 * General Public License version 2 as published by the Free Software
24 #include <asm/arch/cpu.h>
25 #include <asm/arch/clock.h>
26 #include <asm/arch/gpio.h>
27 #include <asm/arch/usbc.h>
28 #include <asm-generic/gpio.h>
29 #include "linux-compat.h"
30 #include "musb_core.h"
31 #ifdef CONFIG_AXP152_POWER
34 #ifdef CONFIG_AXP209_POWER
37 #ifdef CONFIG_AXP221_POWER
41 /******************************************************************************
42 ******************************************************************************
43 * From the Allwinner driver
44 ******************************************************************************
45 ******************************************************************************/
47 /******************************************************************************
48 * From include/sunxi_usb_bsp.h
49 ******************************************************************************/
52 #define USBC_REG_o_ISCR 0x0400
53 #define USBC_REG_o_PHYCTL 0x0404
54 #define USBC_REG_o_PHYBIST 0x0408
55 #define USBC_REG_o_PHYTUNE 0x040c
57 #define USBC_REG_o_VEND0 0x0043
59 /* Interface Status and Control */
60 #define USBC_BP_ISCR_VBUS_VALID_FROM_DATA 30
61 #define USBC_BP_ISCR_VBUS_VALID_FROM_VBUS 29
62 #define USBC_BP_ISCR_EXT_ID_STATUS 28
63 #define USBC_BP_ISCR_EXT_DM_STATUS 27
64 #define USBC_BP_ISCR_EXT_DP_STATUS 26
65 #define USBC_BP_ISCR_MERGED_VBUS_STATUS 25
66 #define USBC_BP_ISCR_MERGED_ID_STATUS 24
68 #define USBC_BP_ISCR_ID_PULLUP_EN 17
69 #define USBC_BP_ISCR_DPDM_PULLUP_EN 16
70 #define USBC_BP_ISCR_FORCE_ID 14
71 #define USBC_BP_ISCR_FORCE_VBUS_VALID 12
72 #define USBC_BP_ISCR_VBUS_VALID_SRC 10
74 #define USBC_BP_ISCR_HOSC_EN 7
75 #define USBC_BP_ISCR_VBUS_CHANGE_DETECT 6
76 #define USBC_BP_ISCR_ID_CHANGE_DETECT 5
77 #define USBC_BP_ISCR_DPDM_CHANGE_DETECT 4
78 #define USBC_BP_ISCR_IRQ_ENABLE 3
79 #define USBC_BP_ISCR_VBUS_CHANGE_DETECT_EN 2
80 #define USBC_BP_ISCR_ID_CHANGE_DETECT_EN 1
81 #define USBC_BP_ISCR_DPDM_CHANGE_DETECT_EN 0
83 /******************************************************************************
85 ******************************************************************************/
87 static u32 USBC_WakeUp_ClearChangeDetect(u32 reg_val)
91 temp &= ~(1 << USBC_BP_ISCR_VBUS_CHANGE_DETECT);
92 temp &= ~(1 << USBC_BP_ISCR_ID_CHANGE_DETECT);
93 temp &= ~(1 << USBC_BP_ISCR_DPDM_CHANGE_DETECT);
98 static void USBC_EnableIdPullUp(__iomem void *base)
102 reg_val = musb_readl(base, USBC_REG_o_ISCR);
103 reg_val |= (1 << USBC_BP_ISCR_ID_PULLUP_EN);
104 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
105 musb_writel(base, USBC_REG_o_ISCR, reg_val);
108 static void USBC_DisableIdPullUp(__iomem void *base)
112 reg_val = musb_readl(base, USBC_REG_o_ISCR);
113 reg_val &= ~(1 << USBC_BP_ISCR_ID_PULLUP_EN);
114 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
115 musb_writel(base, USBC_REG_o_ISCR, reg_val);
118 static void USBC_EnableDpDmPullUp(__iomem void *base)
122 reg_val = musb_readl(base, USBC_REG_o_ISCR);
123 reg_val |= (1 << USBC_BP_ISCR_DPDM_PULLUP_EN);
124 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
125 musb_writel(base, USBC_REG_o_ISCR, reg_val);
128 static void USBC_DisableDpDmPullUp(__iomem void *base)
132 reg_val = musb_readl(base, USBC_REG_o_ISCR);
133 reg_val &= ~(1 << USBC_BP_ISCR_DPDM_PULLUP_EN);
134 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
135 musb_writel(base, USBC_REG_o_ISCR, reg_val);
138 static void USBC_ForceIdToLow(__iomem void *base)
142 reg_val = musb_readl(base, USBC_REG_o_ISCR);
143 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID);
144 reg_val |= (0x02 << USBC_BP_ISCR_FORCE_ID);
145 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
146 musb_writel(base, USBC_REG_o_ISCR, reg_val);
149 static void USBC_ForceIdToHigh(__iomem void *base)
153 reg_val = musb_readl(base, USBC_REG_o_ISCR);
154 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_ID);
155 reg_val |= (0x03 << USBC_BP_ISCR_FORCE_ID);
156 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
157 musb_writel(base, USBC_REG_o_ISCR, reg_val);
160 static void USBC_ForceVbusValidToHigh(__iomem void *base)
164 reg_val = musb_readl(base, USBC_REG_o_ISCR);
165 reg_val &= ~(0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID);
166 reg_val |= (0x03 << USBC_BP_ISCR_FORCE_VBUS_VALID);
167 reg_val = USBC_WakeUp_ClearChangeDetect(reg_val);
168 musb_writel(base, USBC_REG_o_ISCR, reg_val);
171 static void USBC_ConfigFIFO_Base(void)
175 /* config usb fifo, 8kb mode */
176 reg_value = readl(SUNXI_SRAMC_BASE + 0x04);
177 reg_value &= ~(0x03 << 0);
178 reg_value |= (1 << 0);
179 writel(reg_value, SUNXI_SRAMC_BASE + 0x04);
182 /******************************************************************************
184 ******************************************************************************/
186 static irqreturn_t sunxi_musb_interrupt(int irq, void *__hci)
188 struct musb *musb = __hci;
189 irqreturn_t retval = IRQ_NONE;
191 /* read and flush interrupts */
192 musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
194 musb_writeb(musb->mregs, MUSB_INTRUSB, musb->int_usb);
195 musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
197 musb_writew(musb->mregs, MUSB_INTRTX, musb->int_tx);
198 musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);
200 musb_writew(musb->mregs, MUSB_INTRRX, musb->int_rx);
202 if (musb->int_usb || musb->int_tx || musb->int_rx)
203 retval |= musb_interrupt(musb);
208 static void sunxi_musb_enable(struct musb *musb)
210 pr_debug("%s():\n", __func__);
212 /* select PIO mode */
213 musb_writeb(musb->mregs, USBC_REG_o_VEND0, 0);
215 if (is_host_enabled(musb)) {
217 sunxi_usbc_vbus_enable(0);
221 static void sunxi_musb_disable(struct musb *musb)
223 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
225 pr_debug("%s():\n", __func__);
227 /* Put the controller back in a pristane state for "usb reset" */
228 if (musb->is_active) {
229 sunxi_usbc_disable(0);
230 #ifdef CONFIG_SUNXI_GEN_SUN6I
231 clrbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_GATE_OFFSET_USB0);
233 clrbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0);
237 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0);
238 #ifdef CONFIG_SUNXI_GEN_SUN6I
239 setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_GATE_OFFSET_USB0);
241 sunxi_usbc_enable(0);
246 static int sunxi_musb_init(struct musb *musb)
248 struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
251 pr_debug("%s():\n", __func__);
253 err = sunxi_usbc_request_resources(0);
257 if (is_host_enabled(musb)) {
258 err = sunxi_usbc_vbus_detect(0);
260 eprintf("Error: A charger is plugged into the OTG\n");
261 sunxi_usbc_free_resources(0);
266 musb->isr = sunxi_musb_interrupt;
268 setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_USB0);
269 #ifdef CONFIG_SUNXI_GEN_SUN6I
270 setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_GATE_OFFSET_USB0);
272 sunxi_usbc_enable(0);
274 USBC_ConfigFIFO_Base();
275 USBC_EnableDpDmPullUp(musb->mregs);
276 USBC_EnableIdPullUp(musb->mregs);
278 if (is_host_enabled(musb)) {
280 USBC_ForceIdToLow(musb->mregs);
282 /* Peripheral mode */
283 USBC_ForceIdToHigh(musb->mregs);
285 USBC_ForceVbusValidToHigh(musb->mregs);
290 static int sunxi_musb_exit(struct musb *musb)
292 pr_debug("%s():\n", __func__);
294 USBC_DisableDpDmPullUp(musb->mregs);
295 USBC_DisableIdPullUp(musb->mregs);
296 sunxi_usbc_vbus_disable(0);
297 sunxi_usbc_disable(0);
299 return sunxi_usbc_free_resources(0);
302 const struct musb_platform_ops sunxi_musb_ops = {
303 .init = sunxi_musb_init,
304 .exit = sunxi_musb_exit,
306 .enable = sunxi_musb_enable,
307 .disable = sunxi_musb_disable,