1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2009 Stefan Roese <sr@denx.de>, DENX Software Engineering 4 * 5 * Original Author Guenter Gebhardt 6 * Copyright (C) 2006 Micronas GmbH 7 */ 8 9 #include <common.h> 10 11 #include "vct.h" 12 13 int vct_ehci_hcd_init(u32 *hccr, u32 *hcor) 14 { 15 int retval; 16 u32 val; 17 u32 addr; 18 19 dcgu_set_reset_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_ON); 20 dcgu_set_reset_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_ON); 21 dcgu_set_clk_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_ON); 22 dcgu_set_clk_switch(DCGU_HW_MODULE_USB_PLL, DCGU_SWITCH_ON); 23 dcgu_set_reset_switch(DCGU_HW_MODULE_USB_24, DCGU_SWITCH_OFF); 24 25 /* Wait until (DCGU_USBPHY_STAT == 7) */ 26 addr = DCGU_USBPHY_STAT(DCGU_BASE); 27 val = reg_read(addr); 28 while (val != 7) 29 val = reg_read(addr); 30 31 dcgu_set_clk_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_ON); 32 dcgu_set_reset_switch(DCGU_HW_MODULE_USB_60, DCGU_SWITCH_OFF); 33 34 retval = scc_reset(SCC_USB_RW, 0); 35 if (retval) { 36 printf("scc_reset(SCC_USB_RW, 0) returned: 0x%x\n", retval); 37 return retval; 38 } else { 39 retval = scc_reset(SCC_CPU1_SPDMA_RW, 0); 40 if (retval) { 41 printf("scc_reset(SCC_CPU1_SPDMA_RW, 0) returned: 0x%x\n", 42 retval); 43 return retval; 44 } 45 } 46 47 if (!retval) { 48 /* 49 * For the AGU bypass, where the SCC client provides full 50 * physical address 51 */ 52 scc_set_usb_address_generation_mode(1); 53 scc_setup_dma(SCC_USB_RW, BCU_USB_BUFFER_1, DMA_LINEAR, 54 USE_NO_FH, DMA_READ, 0); 55 scc_setup_dma(SCC_CPU1_SPDMA_RW, BCU_USB_BUFFER_1, DMA_LINEAR, 56 USE_NO_FH, DMA_WRITE, 0); 57 scc_setup_dma(SCC_USB_RW, BCU_USB_BUFFER_0, DMA_LINEAR, 58 USE_NO_FH, DMA_WRITE, 0); 59 scc_setup_dma(SCC_CPU1_SPDMA_RW, BCU_USB_BUFFER_0, DMA_LINEAR, 60 USE_NO_FH, DMA_READ, 0); 61 62 /* Enable memory interface */ 63 scc_enable(SCC_USB_RW, 1); 64 65 /* Start (start_cmd=0) DMAs */ 66 scc_dma_cmd(SCC_USB_RW, DMA_START, 0, DMA_READ); 67 scc_dma_cmd(SCC_USB_RW, DMA_START, 0, DMA_WRITE); 68 } else { 69 printf("Cannot configure USB memory channel.\n"); 70 printf("USB can not access RAM. SCC configuration failed.\n"); 71 return retval; 72 } 73 74 /* Wait a short while */ 75 udelay(300000); 76 77 reg_write(USBH_BURSTSIZE(USBH_BASE), 0x00001c1c); 78 79 /* Set EHCI structures and DATA in RAM */ 80 reg_write(USBH_USBHMISC(USBH_BASE), 0x00840003); 81 /* Set USBMODE to bigendian and set host mode */ 82 reg_write(USBH_USBMODE(USBH_BASE), 0x00000007); 83 84 /* 85 * USBH_BURSTSIZE MUST EQUAL 0x00001c1c in order for 86 * 512 byte USB transfers on the bulk pipe to work properly. 87 * Set USBH_BURSTSIZE to 0x00001c1c 88 */ 89 reg_write(USBH_BURSTSIZE(USBH_BASE), 0x00001c1c); 90 91 /* Insert access register addresses */ 92 *hccr = REG_GLOBAL_START_ADDR + USBH_CAPLENGTH(USBH_BASE); 93 *hcor = REG_GLOBAL_START_ADDR + USBH_USBCMD(USBH_BASE); 94 95 return 0; 96 } 97