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mxc_ipuv3: fix memory alignment of framebuffer
[karo-tx-uboot.git] / drivers / usb / host / ehci-omap.c
1 /*
2  * (C) Copyright 2011 Ilya Yanok, Emcraft Systems
3  * (C) Copyright 2004-2008
4  * Texas Instruments, <www.ti.com>
5  *
6  * Derived from Beagle Board code by
7  *      Sunil Kumar <sunilsaini05@gmail.com>
8  *      Shashi Ranjan <shashiranjanmca05@gmail.com>
9  *
10  *
11  * See file CREDITS for list of people who contributed to this
12  * project.
13  *
14  * This program is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU General Public License as
16  * published by the Free Software Foundation; either version 2 of
17  * the License, or (at your option) any later version.
18  *
19  * This program is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22  * GNU General Public License for more details.
23  *
24  * You should have received a copy of the GNU General Public License
25  * along with this program; if not, write to the Free Software
26  * Foundation, Inc.
27  */
28 #include <common.h>
29 #include <usb.h>
30 #include <usb/ulpi.h>
31 #include <errno.h>
32 #include <asm/io.h>
33 #include <asm/gpio.h>
34 #include <asm/arch/ehci.h>
35 #include <asm/ehci-omap.h>
36
37 #include "ehci.h"
38
39 static struct omap_uhh *const uhh = (struct omap_uhh *)OMAP_UHH_BASE;
40 static struct omap_usbtll *const usbtll = (struct omap_usbtll *)OMAP_USBTLL_BASE;
41 static struct omap_ehci *const ehci = (struct omap_ehci *)OMAP_EHCI_BASE;
42
43 static int omap_uhh_reset(void)
44 {
45         unsigned long init = get_timer(0);
46
47         /* perform UHH soft reset, and wait until reset is complete */
48         writel(OMAP_UHH_SYSCONFIG_SOFTRESET, &uhh->sysc);
49
50         /* Wait for UHH reset to complete */
51         while (!(readl(&uhh->syss) & OMAP_UHH_SYSSTATUS_EHCI_RESETDONE))
52                 if (get_timer(init) > CONFIG_SYS_HZ) {
53                         debug("OMAP UHH error: timeout resetting ehci\n");
54                         return -EL3RST;
55                 }
56
57         return 0;
58 }
59
60 static int omap_ehci_tll_reset(void)
61 {
62         unsigned long init = get_timer(0);
63
64         /* perform TLL soft reset, and wait until reset is complete */
65         writel(OMAP_USBTLL_SYSCONFIG_SOFTRESET, &usbtll->sysc);
66
67         /* Wait for TLL reset to complete */
68         while (!(readl(&usbtll->syss) & OMAP_USBTLL_SYSSTATUS_RESETDONE))
69                 if (get_timer(init) > CONFIG_SYS_HZ) {
70                         debug("OMAP EHCI error: timeout resetting TLL\n");
71                         return -EL3RST;
72         }
73
74         return 0;
75 }
76
77 static void omap_usbhs_hsic_init(int port)
78 {
79         unsigned int reg;
80
81         /* Enable channels now */
82         reg = readl(&usbtll->channel_conf + port);
83
84         setbits_le32(&reg, (OMAP_TLL_CHANNEL_CONF_CHANMODE_TRANSPARENT_UTMI
85                 | OMAP_TLL_CHANNEL_CONF_ULPINOBITSTUFF
86                 | OMAP_TLL_CHANNEL_CONF_DRVVBUS
87                 | OMAP_TLL_CHANNEL_CONF_CHRGVBUS
88                 | OMAP_TLL_CHANNEL_CONF_CHANEN));
89
90         writel(reg, &usbtll->channel_conf + port);
91 }
92
93 static void omap_ehci_soft_phy_reset(int port)
94 {
95         struct ulpi_viewport ulpi_vp;
96
97         ulpi_vp.viewport_addr = (u32)&ehci->insreg05_utmi_ulpi;
98         ulpi_vp.port_num = port;
99
100         ulpi_reset(&ulpi_vp);
101 }
102
103 inline int __board_usb_init(void)
104 {
105         return 0;
106 }
107 int board_usb_init(void) __attribute__((weak, alias("__board_usb_init")));
108
109 #if defined(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO) || \
110         defined(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO)
111 /* controls PHY(s) reset signal(s) */
112 static inline void omap_ehci_phy_reset(int on, int delay)
113 {
114         /*
115          * Refer ISSUE1:
116          * Hold the PHY in RESET for enough time till
117          * PHY is settled and ready
118          */
119         if (delay && !on)
120                 udelay(delay);
121 #ifdef CONFIG_OMAP_EHCI_PHY1_RESET_GPIO
122         gpio_request(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO, "USB PHY1 reset");
123         gpio_direction_output(CONFIG_OMAP_EHCI_PHY1_RESET_GPIO, !on);
124 #endif
125 #ifdef CONFIG_OMAP_EHCI_PHY2_RESET_GPIO
126         gpio_request(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO, "USB PHY2 reset");
127         gpio_direction_output(CONFIG_OMAP_EHCI_PHY2_RESET_GPIO, !on);
128 #endif
129
130         /* Hold the PHY in RESET for enough time till DIR is high */
131         /* Refer: ISSUE1 */
132         if (delay && on)
133                 udelay(delay);
134 }
135 #else
136 #define omap_ehci_phy_reset(on, delay)  do {} while (0)
137 #endif
138
139 /* Reset is needed otherwise the kernel-driver will throw an error. */
140 int omap_ehci_hcd_stop(void)
141 {
142         debug("Resetting OMAP EHCI\n");
143         omap_ehci_phy_reset(1, 0);
144
145         if (omap_uhh_reset() < 0)
146                 return -1;
147
148         if (omap_ehci_tll_reset() < 0)
149                 return -1;
150
151         return 0;
152 }
153
154 /*
155  * Initialize the OMAP EHCI controller and PHY.
156  * Based on "drivers/usb/host/ehci-omap.c" from Linux 3.1
157  * See there for additional Copyrights.
158  */
159 int omap_ehci_hcd_init(struct omap_usbhs_board_data *usbhs_pdata,
160                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
161 {
162         int ret;
163         unsigned int i, reg = 0, rev = 0;
164
165         debug("Initializing OMAP EHCI\n");
166
167         ret = board_usb_init();
168         if (ret < 0)
169                 return ret;
170
171         /* Put the PHY in RESET */
172         omap_ehci_phy_reset(1, 10);
173
174         ret = omap_uhh_reset();
175         if (ret < 0)
176                 return ret;
177
178         ret = omap_ehci_tll_reset();
179         if (ret)
180                 return ret;
181
182         writel(OMAP_USBTLL_SYSCONFIG_ENAWAKEUP |
183                 OMAP_USBTLL_SYSCONFIG_SIDLEMODE |
184                 OMAP_USBTLL_SYSCONFIG_CACTIVITY, &usbtll->sysc);
185
186         /* Put UHH in NoIdle/NoStandby mode */
187         writel(OMAP_UHH_SYSCONFIG_VAL, &uhh->sysc);
188
189         /* setup ULPI bypass and burst configurations */
190         clrsetbits_le32(&reg, OMAP_UHH_HOSTCONFIG_INCRX_ALIGN_EN,
191                 (OMAP_UHH_HOSTCONFIG_INCR4_BURST_EN |
192                 OMAP_UHH_HOSTCONFIG_INCR8_BURST_EN |
193                 OMAP_UHH_HOSTCONFIG_INCR16_BURST_EN));
194
195         rev = readl(&uhh->rev);
196         if (rev == OMAP_USBHS_REV1) {
197                 if (is_ehci_phy_mode(usbhs_pdata->port_mode[0]))
198                         clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);
199                 else
200                         setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P1_BYPASS);
201
202                 if (is_ehci_phy_mode(usbhs_pdata->port_mode[1]))
203                         clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);
204                 else
205                         setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P2_BYPASS);
206
207                 if (is_ehci_phy_mode(usbhs_pdata->port_mode[2]))
208                         clrbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
209                 else
210                         setbits_le32(&reg, OMAP_UHH_HOSTCONFIG_ULPI_P3_BYPASS);
211         } else if (rev == OMAP_USBHS_REV2) {
212                 clrsetbits_le32(&reg, (OMAP_P1_MODE_CLEAR | OMAP_P2_MODE_CLEAR),
213                                         OMAP4_UHH_HOSTCONFIG_APP_START_CLK);
214
215                 /* Clear port mode fields for PHY mode*/
216
217                 if (is_ehci_hsic_mode(usbhs_pdata->port_mode[0]))
218                         setbits_le32(&reg, OMAP_P1_MODE_HSIC);
219
220                 if (is_ehci_hsic_mode(usbhs_pdata->port_mode[1]))
221                         setbits_le32(&reg, OMAP_P2_MODE_HSIC);
222
223                 if (is_ehci_hsic_mode(usbhs_pdata->port_mode[2]))
224                         setbits_le32(&reg, OMAP_P3_MODE_HSIC);
225         }
226
227         debug("OMAP UHH_REVISION 0x%x\n", rev);
228         writel(reg, &uhh->hostconfig);
229
230         for (i = 0; i < OMAP_HS_USB_PORTS; i++)
231                 if (is_ehci_hsic_mode(usbhs_pdata->port_mode[i]))
232                         omap_usbhs_hsic_init(i);
233
234         omap_ehci_phy_reset(0, 10);
235
236         /*
237          * An undocumented "feature" in the OMAP3 EHCI controller,
238          * causes suspended ports to be taken out of suspend when
239          * the USBCMD.Run/Stop bit is cleared (for example when
240          * we do ehci_bus_suspend).
241          * This breaks suspend-resume if the root-hub is allowed
242          * to suspend. Writing 1 to this undocumented register bit
243          * disables this feature and restores normal behavior.
244          */
245         writel(EHCI_INSNREG04_DISABLE_UNSUSPEND, &ehci->insreg04);
246
247         for (i = 0; i < OMAP_HS_USB_PORTS; i++)
248                 if (is_ehci_phy_mode(usbhs_pdata->port_mode[i]))
249                         omap_ehci_soft_phy_reset(i);
250
251         *hccr = (struct ehci_hccr *)(OMAP_EHCI_BASE);
252         *hcor = (struct ehci_hcor *)(OMAP_EHCI_BASE + 0x10);
253
254         debug("OMAP EHCI init done\n");
255         return 0;
256 }