]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - drivers/usb/host/ehci-zynq.c
Merge branch 'u-boot-samsung/master' into 'u-boot-arm/master'
[karo-tx-uboot.git] / drivers / usb / host / ehci-zynq.c
1 /*
2  * (C) Copyright 2014, Xilinx, Inc
3  *
4  * USB Low level initialization(Specific to zynq)
5  *
6  * SPDX-License-Identifier:     GPL-2.0+
7  */
8
9 #include <common.h>
10 #include <asm/arch/hardware.h>
11 #include <asm/arch/sys_proto.h>
12 #include <asm/io.h>
13 #include <usb.h>
14 #include <usb/ehci-fsl.h>
15 #include <usb/ulpi.h>
16
17 #include "ehci.h"
18
19 #define ZYNQ_USB_USBCMD_RST                     0x0000002
20 #define ZYNQ_USB_USBCMD_STOP                    0x0000000
21 #define ZYNQ_USB_NUM_MIO                        12
22
23 /*
24  * Create the appropriate control structures to manage
25  * a new EHCI host controller.
26  */
27 int ehci_hcd_init(int index,  enum usb_init_type init, struct ehci_hccr **hccr,
28                   struct ehci_hcor **hcor)
29 {
30         struct usb_ehci *ehci;
31         struct ulpi_viewport ulpi_vp;
32         int ret, mio_usb;
33         /* Used for writing the ULPI data address */
34         struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
35
36         if (!index) {
37                 mio_usb = zynq_slcr_get_mio_pin_status("usb0");
38                 if (mio_usb != ZYNQ_USB_NUM_MIO) {
39                         printf("usb0 wrong num MIO: %d, Index %d\n", mio_usb,
40                                index);
41                         return -1;
42                 }
43                 ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0;
44         } else {
45                 mio_usb = zynq_slcr_get_mio_pin_status("usb1");
46                 if (mio_usb != ZYNQ_USB_NUM_MIO) {
47                         printf("usb1 wrong num MIO: %d, Index %d\n", mio_usb,
48                                index);
49                         return -1;
50                 }
51                 ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1;
52         }
53
54         *hccr = (struct ehci_hccr *)((uint32_t)&ehci->caplength);
55         *hcor = (struct ehci_hcor *)((uint32_t) *hccr +
56                         HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
57
58         ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
59         ulpi_vp.port_num = 0;
60
61         ret = ulpi_init(&ulpi_vp);
62         if (ret) {
63                 puts("zynq ULPI viewport init failed\n");
64                 return -1;
65         }
66
67         /* ULPI set flags */
68         ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
69                    ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
70                    ULPI_OTG_EXTVBUSIND);
71         ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
72                    ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
73                    ULPI_FC_SUSPENDM);
74         ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
75
76         /* Set VBus */
77         ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
78                    ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
79
80         return 0;
81 }
82
83 /*
84  * Destroy the appropriate control structures corresponding
85  * the the EHCI host controller.
86  */
87 int ehci_hcd_stop(int index)
88 {
89         struct usb_ehci *ehci;
90
91         if (!index)
92                 ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR0;
93         else
94                 ehci = (struct usb_ehci *)ZYNQ_USB_BASEADDR1;
95
96         /* Stop controller */
97         writel(ZYNQ_USB_USBCMD_STOP, &ehci->usbcmd);
98         udelay(1000);
99
100         /* Initiate controller reset */
101         writel(ZYNQ_USB_USBCMD_RST, &ehci->usbcmd);
102
103         return 0;
104 }