]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - drivers/usb/host/ehci-fsl.c
Merge branch 'u-boot-microblaze/zynq' into 'u-boot-arm/master'
[karo-tx-uboot.git] / drivers / usb / host / ehci-fsl.c
1 /*
2  * (C) Copyright 2009, 2011 Freescale Semiconductor, Inc.
3  *
4  * (C) Copyright 2008, Excito Elektronik i Sk=E5ne AB
5  *
6  * Author: Tor Krill tor@excito.com
7  *
8  * SPDX-License-Identifier:     GPL-2.0+
9  */
10
11 #include <common.h>
12 #include <pci.h>
13 #include <usb.h>
14 #include <asm/io.h>
15 #include <usb/ehci-fsl.h>
16 #include <hwconfig.h>
17 #include <asm/fsl_errata.h>
18
19 #include "ehci.h"
20
21 static void set_txfifothresh(struct usb_ehci *, u32);
22
23 /* Check USB PHY clock valid */
24 static int usb_phy_clk_valid(struct usb_ehci *ehci)
25 {
26         if (!((in_be32(&ehci->control) & PHY_CLK_VALID) ||
27                         in_be32(&ehci->prictrl))) {
28                 printf("USB PHY clock invalid!\n");
29                 return 0;
30         } else {
31                 return 1;
32         }
33 }
34
35 /*
36  * Create the appropriate control structures to manage
37  * a new EHCI host controller.
38  *
39  * Excerpts from linux ehci fsl driver.
40  */
41 int ehci_hcd_init(int index, enum usb_init_type init,
42                 struct ehci_hccr **hccr, struct ehci_hcor **hcor)
43 {
44         struct usb_ehci *ehci = NULL;
45         const char *phy_type = NULL;
46         size_t len;
47         char current_usb_controller[5];
48 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
49         char usb_phy[5];
50
51         usb_phy[0] = '\0';
52 #endif
53         if (has_erratum_a007075()) {
54                 /*
55                  * A 5ms delay is needed after applying soft-reset to the
56                  * controller to let external ULPI phy come out of reset.
57                  * This delay needs to be added before re-initializing
58                  * the controller after soft-resetting completes
59                  */
60                 mdelay(5);
61         }
62         memset(current_usb_controller, '\0', 5);
63         snprintf(current_usb_controller, 4, "usb%d", index+1);
64
65         switch (index) {
66         case 0:
67                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB1_ADDR;
68                 break;
69         case 1:
70                 ehci = (struct usb_ehci *)CONFIG_SYS_FSL_USB2_ADDR;
71                 break;
72         default:
73                 printf("ERROR: wrong controller index!!\n");
74                 break;
75         };
76
77         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
78         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
79                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
80
81         /* Set to Host mode */
82         setbits_le32(&ehci->usbmode, CM_HOST);
83
84         out_be32(&ehci->snoop1, SNOOP_SIZE_2GB);
85         out_be32(&ehci->snoop2, 0x80000000 | SNOOP_SIZE_2GB);
86
87         /* Init phy */
88         if (hwconfig_sub(current_usb_controller, "phy_type"))
89                 phy_type = hwconfig_subarg(current_usb_controller,
90                                 "phy_type", &len);
91         else
92                 phy_type = getenv("usb_phy_type");
93
94         if (!phy_type) {
95 #ifdef CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY
96                 /* if none specified assume internal UTMI */
97                 strcpy(usb_phy, "utmi");
98                 phy_type = usb_phy;
99 #else
100                 printf("WARNING: USB phy type not defined !!\n");
101                 return -1;
102 #endif
103         }
104
105         if (!strncmp(phy_type, "utmi", 4)) {
106 #if defined(CONFIG_SYS_FSL_USB_INTERNAL_UTMI_PHY)
107                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
108                                 PHY_CLK_SEL_UTMI);
109                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
110                                 UTMI_PHY_EN);
111                 udelay(1000); /* delay required for PHY Clk to appear */
112 #endif
113                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_UTMI);
114                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
115                                 USB_EN);
116         } else {
117                 clrsetbits_be32(&ehci->control, CONTROL_REGISTER_W1C_MASK,
118                                 PHY_CLK_SEL_ULPI);
119                 clrsetbits_be32(&ehci->control, UTMI_PHY_EN |
120                                 CONTROL_REGISTER_W1C_MASK, USB_EN);
121                 udelay(1000); /* delay required for PHY Clk to appear */
122                 if (!usb_phy_clk_valid(ehci))
123                         return -EINVAL;
124                 out_le32(&(*hcor)->or_portsc[0], PORT_PTS_ULPI);
125         }
126
127         out_be32(&ehci->prictrl, 0x0000000c);
128         out_be32(&ehci->age_cnt_limit, 0x00000040);
129         out_be32(&ehci->sictrl, 0x00000001);
130
131         in_le32(&ehci->usbmode);
132
133         if (SVR_SOC_VER(get_svr()) == SVR_T4240 &&
134             IS_SVR_REV(get_svr(), 2, 0))
135                 set_txfifothresh(ehci, TXFIFOTHRESH);
136
137         return 0;
138 }
139
140 /*
141  * Destroy the appropriate control structures corresponding
142  * the the EHCI host controller.
143  */
144 int ehci_hcd_stop(int index)
145 {
146         return 0;
147 }
148
149 /*
150  * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
151  * to counter DDR latencies in writing data into Tx buffer.
152  * This prevents Tx buffer from getting underrun
153  */
154 static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
155 {
156         u32 cmd;
157         cmd = ehci_readl(&ehci->txfilltuning);
158         cmd &= ~TXFIFO_THRESH_MASK;
159         cmd |= TXFIFO_THRESH(txfifo_thresh);
160         ehci_writel(&ehci->txfilltuning, cmd);
161 }