Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
21#include <asm/mach-ath79/ath79.h>
22#include <asm/mach-ath79/ar71xx_regs.h>
23#include "common.h"
24#include "dev-usb.h"
25
26static struct resource ath79_ohci_resources[] = {
27 [0] = {
28 /* .start and .end fields are filled dynamically */
29 .flags = IORESOURCE_MEM,
30 },
31 [1] = {
32 .start = ATH79_MISC_IRQ_OHCI,
33 .end = ATH79_MISC_IRQ_OHCI,
34 .flags = IORESOURCE_IRQ,
35 },
36};
37
38static u64 ath79_ohci_dmamask = DMA_BIT_MASK(32);
39static struct platform_device ath79_ohci_device = {
40 .name = "ath79-ohci",
41 .id = -1,
42 .resource = ath79_ohci_resources,
43 .num_resources = ARRAY_SIZE(ath79_ohci_resources),
44 .dev = {
45 .dma_mask = &ath79_ohci_dmamask,
46 .coherent_dma_mask = DMA_BIT_MASK(32),
47 },
48};
49
50static struct resource ath79_ehci_resources[] = {
51 [0] = {
52 /* .start and .end fields are filled dynamically */
53 .flags = IORESOURCE_MEM,
54 },
55 [1] = {
56 .start = ATH79_CPU_IRQ_USB,
57 .end = ATH79_CPU_IRQ_USB,
58 .flags = IORESOURCE_IRQ,
59 },
60};
61
62static u64 ath79_ehci_dmamask = DMA_BIT_MASK(32);
63static struct platform_device ath79_ehci_device = {
64 .name = "ath79-ehci",
65 .id = -1,
66 .resource = ath79_ehci_resources,
67 .num_resources = ARRAY_SIZE(ath79_ehci_resources),
68 .dev = {
69 .dma_mask = &ath79_ehci_dmamask,
70 .coherent_dma_mask = DMA_BIT_MASK(32),
71 },
72};
73
74#define AR71XX_USB_RESET_MASK (AR71XX_RESET_USB_HOST | \
75 AR71XX_RESET_USB_PHY | \
76 AR71XX_RESET_USB_OHCI_DLL)
77
78static void __init ath79_usb_setup(void)
79{
80 void __iomem *usb_ctrl_base;
81
82 ath79_device_reset_set(AR71XX_USB_RESET_MASK);
83 mdelay(1000);
84 ath79_device_reset_clear(AR71XX_USB_RESET_MASK);
85
86 usb_ctrl_base = ioremap(AR71XX_USB_CTRL_BASE, AR71XX_USB_CTRL_SIZE);
87
88 /* Turning on the Buff and Desc swap bits */
89 __raw_writel(0xf0000, usb_ctrl_base + AR71XX_USB_CTRL_REG_CONFIG);
90
91 /* WAR for HW bug. Here it adjusts the duration between two SOFS */
92 __raw_writel(0x20c00, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
93
94 iounmap(usb_ctrl_base);
95
96 mdelay(900);
97
98 ath79_ohci_resources[0].start = AR71XX_OHCI_BASE;
99 ath79_ohci_resources[0].end = AR71XX_OHCI_BASE + AR71XX_OHCI_SIZE - 1;
100 platform_device_register(&ath79_ohci_device);
101
102 ath79_ehci_resources[0].start = AR71XX_EHCI_BASE;
103 ath79_ehci_resources[0].end = AR71XX_EHCI_BASE + AR71XX_EHCI_SIZE - 1;
104 ath79_ehci_device.name = "ar71xx-ehci";
105 platform_device_register(&ath79_ehci_device);
106}
107
108static void __init ar7240_usb_setup(void)
109{
110 void __iomem *usb_ctrl_base;
111
112 ath79_device_reset_clear(AR7240_RESET_OHCI_DLL);
113 ath79_device_reset_set(AR7240_RESET_USB_HOST);
114
115 mdelay(1000);
116
117 ath79_device_reset_set(AR7240_RESET_OHCI_DLL);
118 ath79_device_reset_clear(AR7240_RESET_USB_HOST);
119
120 usb_ctrl_base = ioremap(AR7240_USB_CTRL_BASE, AR7240_USB_CTRL_SIZE);
121
122 /* WAR for HW bug. Here it adjusts the duration between two SOFS */
123 __raw_writel(0x3, usb_ctrl_base + AR71XX_USB_CTRL_REG_FLADJ);
124
125 iounmap(usb_ctrl_base);
126
127 ath79_ohci_resources[0].start = AR7240_OHCI_BASE;
128 ath79_ohci_resources[0].end = AR7240_OHCI_BASE + AR7240_OHCI_SIZE - 1;
129 platform_device_register(&ath79_ohci_device);
130}
131
132static void __init ar724x_usb_setup(void)
133{
134 ath79_device_reset_set(AR724X_RESET_USBSUS_OVERRIDE);
135 mdelay(10);
136
137 ath79_device_reset_clear(AR724X_RESET_USB_HOST);
138 mdelay(10);
139
140 ath79_device_reset_clear(AR724X_RESET_USB_PHY);
141 mdelay(10);
142
143 ath79_ehci_resources[0].start = AR724X_EHCI_BASE;
144 ath79_ehci_resources[0].end = AR724X_EHCI_BASE + AR724X_EHCI_SIZE - 1;
145 ath79_ehci_device.name = "ar724x-ehci";
146 platform_device_register(&ath79_ehci_device);
147}
148
149static void __init ar913x_usb_setup(void)
150{
151 ath79_device_reset_set(AR913X_RESET_USBSUS_OVERRIDE);
152 mdelay(10);
153
154 ath79_device_reset_clear(AR913X_RESET_USB_HOST);
155 mdelay(10);
156
157 ath79_device_reset_clear(AR913X_RESET_USB_PHY);
158 mdelay(10);
159
160 ath79_ehci_resources[0].start = AR913X_EHCI_BASE;
161 ath79_ehci_resources[0].end = AR913X_EHCI_BASE + AR913X_EHCI_SIZE - 1;
162 ath79_ehci_device.name = "ar913x-ehci";
163 platform_device_register(&ath79_ehci_device);
164}
165
166static void __init ar933x_usb_setup(void)
167{
168 ath79_device_reset_set(AR933X_RESET_USBSUS_OVERRIDE);
169 mdelay(10);
170
171 ath79_device_reset_clear(AR933X_RESET_USB_HOST);
172 mdelay(10);
173
174 ath79_device_reset_clear(AR933X_RESET_USB_PHY);
175 mdelay(10);
176
177 ath79_ehci_resources[0].start = AR933X_EHCI_BASE;
178 ath79_ehci_resources[0].end = AR933X_EHCI_BASE + AR933X_EHCI_SIZE - 1;
179 ath79_ehci_device.name = "ar933x-ehci";
180 platform_device_register(&ath79_ehci_device);
181}
182
183void __init ath79_register_usb(void)
184{
185 if (soc_is_ar71xx())
186 ath79_usb_setup();
187 else if (soc_is_ar7240())
188 ar7240_usb_setup();
189 else if (soc_is_ar7241() || soc_is_ar7242())
190 ar724x_usb_setup();
191 else if (soc_is_ar913x())
192 ar913x_usb_setup();
193 else if (soc_is_ar933x())
194 ar933x_usb_setup();
195 else
196 BUG();
197}