1/*
  2 *  Atheros AR7XXX/AR9XXX USB Host Controller device
  3 *
  4 *  Copyright (C) 2008-2011 Gabor Juhos <juhosg@openwrt.org>
  5 *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  6 *
  7 *  Parts of this file are based on Atheros' 2.6.15 BSP
  8 *
  9 *  This program is free software; you can redistribute it and/or modify it
 10 *  under the terms of the GNU General Public License version 2 as published
 11 *  by the Free Software Foundation.
 12 */
 13
 14#include <linux/kernel.h>
 15#include <linux/init.h>
 16#include <linux/delay.h>
 17#include <linux/irq.h>
 18#include <linux/dma-mapping.h>
 19#include <linux/platform_device.h>
 20#include <linux/usb/ehci_pdriver.h>
 21#include <linux/usb/ohci_pdriver.h>
 22
 23#include <asm/mach-ath79/ath79.h>
 24#include <asm/mach-ath79/ar71xx_regs.h>
 25#include "common.h"
 26#include "dev-usb.h"
 27
 28static struct resource ath79_ohci_resources[] = {
 29	[0] = {
 30		/* .start and .end fields are filled dynamically */
 31		.flags	= IORESOURCE_MEM,
 32	},
 33	[1] = {
 34		.start	= ATH79_MISC_IRQ_OHCI,
 35		.end	= ATH79_MISC_IRQ_OHCI,
 36		.flags	= IORESOURCE_IRQ,
 37	},
 38};
 39
 40static u64 ath79_ohci_dmamask = DMA_BIT_MASK(32);
 41
 42static struct usb_ohci_pdata ath79_ohci_pdata = {
 43};
 44
 45static struct platform_device ath79_ohci_device = {
 46	.name		= "ohci-platform",
 47	.id		= -1,
 48	.resource	= ath79_ohci_resources,
 49	.num_resources	= ARRAY_SIZE(ath79_ohci_resources),
 50	.dev = {
 51		.dma_mask		= &ath79_ohci_dmamask,
 52		.coherent_dma_mask	= DMA_BIT_MASK(32),
 53		.platform_data		= &ath79_ohci_pdata,
 54	},
 55};
 56
 57static struct resource ath79_ehci_resources[] = {
 58	[0] = {
 59		/* .start and .end fields are filled dynamically */
 60		.flags	= IORESOURCE_MEM,
 61	},
 62	[1] = {
 63		.start	= ATH79_CPU_IRQ_USB,
 64		.end	= ATH79_CPU_IRQ_USB,
 65		.flags	= IORESOURCE_IRQ,
 66	},
 67};
 68
 69static u64 ath79_ehci_dmamask = DMA_BIT_MASK(32);
 70
 71static struct usb_ehci_pdata ath79_ehci_pdata_v1 = {
 72	.has_synopsys_hc_bug	= 1,
 73	.port_power_off		= 1,
 74};
 75
 76static struct usb_ehci_pdata ath79_ehci_pdata_v2 = {
 77	.caps_offset		= 0x100,
 78	.has_tt			= 1,
 79	.port_power_off		= 1,
 80};
 81
 82static struct platform_device ath79_ehci_device = {
 83	.name		= "ehci-platform",
 84	.id		= -1,
 85	.resource	= ath79_ehci_resources,
 86	.num_resources	= ARRAY_SIZE(ath79_ehci_resources),
 87	.dev = {
 88		.dma_mask		= &ath79_ehci_dmamask,
 89		.coherent_dma_mask	= DMA_BIT_MASK(32),
 90	},
 91};
 92
 93#define AR71XX_USB_RESET_MASK	(AR71XX_RESET_USB_HOST | \
 94				 AR71XX_RESET_USB_PHY | \
 95				 AR71XX_RESET_USB_OHCI_DLL)
 96
 97static void __init ath79_usb_setup(void)
 98{
 99	void __iomem *usb_ctrl_base;
100
101	ath79_device_reset_set(AR71XX_USB_RESET_MASK);
102	mdelay(1000);
103	ath79_device_reset_clear(AR71XX_USB_RESET_MASK);
104
105	usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
106
107	/* Turning on the Buff and Desc swap bits */
108	__raw_writel(0xf0000, usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
109
110	/* WAR for HW bug. Here it adjusts the duration between two SOFS */
111	__raw_writel(0x20c00, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
112
113	iounmap(usb_ctrl_base);
114
115	mdelay(900);
116
117	ath79_ohci_resources[0].start = AR71XX_OHCI_BASE;
118	ath79_ohci_resources[0].end = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1;
119	platform_device_register(&ath79_ohci_device);
120
121	ath79_ehci_resources[0].start = AR71XX_EHCI_BASE;
122	ath79_ehci_resources[0].end = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1;
123	ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v1;
124	platform_device_register(&ath79_ehci_device);
125}
126
127static void __init ar7240_usb_setup(void)
128{
129	void __iomem *usb_ctrl_base;
130
131	ath79_device_reset_clear(AR7240_RESET_OHCI_DLL);
132	ath79_device_reset_set(AR7240_RESET_USB_HOST);
133
134	mdelay(1000);
135
136	ath79_device_reset_set(AR7240_RESET_OHCI_DLL);
137	ath79_device_reset_clear(AR7240_RESET_USB_HOST);
138
139	usb_ctrl_base = ioremap(AR7240_USB_CTRL_BASE, AR7240_USB_CTRL_SIZE);
140
141	/* WAR for HW bug. Here it adjusts the duration between two SOFS */
142	__raw_writel(0x3, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
143
144	iounmap(usb_ctrl_base);
145
146	ath79_ohci_resources[0].start = AR7240_OHCI_BASE;
147	ath79_ohci_resources[0].end = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1;
148	platform_device_register(&ath79_ohci_device);
149}
150
151static void __init ar724x_usb_setup(void)
152{
153	ath79_device_reset_set(AR724X_RESET_USBSUS_OVERRIDE);
154	mdelay(10);
155
156	ath79_device_reset_clear(AR724X_RESET_USB_HOST);
157	mdelay(10);
158
159	ath79_device_reset_clear(AR724X_RESET_USB_PHY);
160	mdelay(10);
161
162	ath79_ehci_resources[0].start = AR724X_EHCI_BASE;
163	ath79_ehci_resources[0].end = AR724X_EHCI_BASE + AR724X_EHCI_SIZE - 1;
164	ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
165	platform_device_register(&ath79_ehci_device);
166}
167
168static void __init ar913x_usb_setup(void)
169{
170	ath79_device_reset_set(AR913X_RESET_USBSUS_OVERRIDE);
171	mdelay(10);
172
173	ath79_device_reset_clear(AR913X_RESET_USB_HOST);
174	mdelay(10);
175
176	ath79_device_reset_clear(AR913X_RESET_USB_PHY);
177	mdelay(10);
178
179	ath79_ehci_resources[0].start = AR913X_EHCI_BASE;
180	ath79_ehci_resources[0].end = AR913X_EHCI_BASE + AR913X_EHCI_SIZE - 1;
181	ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
182	platform_device_register(&ath79_ehci_device);
183}
184
185static void __init ar933x_usb_setup(void)
186{
187	ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
188	mdelay(10);
189
190	ath79_device_reset_clear(AR933X_RESET_USB_HOST);
191	mdelay(10);
192
193	ath79_device_reset_clear(AR933X_RESET_USB_PHY);
194	mdelay(10);
195
196	ath79_ehci_resources[0].start = AR933X_EHCI_BASE;
197	ath79_ehci_resources[0].end = AR933X_EHCI_BASE + AR933X_EHCI_SIZE - 1;
198	ath79_ehci_device.dev.platform_data = &ath79_ehci_pdata_v2;
199	platform_device_register(&ath79_ehci_device);
200}
201
202void __init ath79_register_usb(void)
203{
204	if (soc_is_ar71xx())
205		ath79_usb_setup();
206	else if (soc_is_ar7240())
207		ar7240_usb_setup();
208	else if (soc_is_ar7241() || soc_is_ar7242())
209		ar724x_usb_setup();
210	else if (soc_is_ar913x())
211		ar913x_usb_setup();
212	else if (soc_is_ar933x())
213		ar933x_usb_setup();
214	else
215		BUG();
216}