1 /*
2 * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
3 *
4 * (C) Copyright 2009 Freescale Semiconductor, Inc.
5 *
6 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #include <common.h>
10 #include <usb.h>
11 #include <asm/io.h>
12 #include <asm/arch/imx-regs.h>
13 #include <asm/arch/iomux-mx51.h>
14 #include <asm/gpio.h>
15 #include <usb/ehci-fsl.h>
16 #include <usb/ulpi.h>
17 #include <errno.h>
18
19 #include "../../../drivers/usb/host/ehci.h"
20
21 /*
22 * Configure the USB H1 and USB H2 IOMUX
23 */
setup_iomux_usb(void)24 void setup_iomux_usb(void)
25 {
26 static const iomux_v3_cfg_t usb_h1_pads[] = {
27 MX51_PAD_USBH1_CLK__USBH1_CLK,
28 MX51_PAD_USBH1_DIR__USBH1_DIR,
29 MX51_PAD_USBH1_STP__USBH1_STP,
30 MX51_PAD_USBH1_NXT__USBH1_NXT,
31 MX51_PAD_USBH1_DATA0__USBH1_DATA0,
32 MX51_PAD_USBH1_DATA1__USBH1_DATA1,
33 MX51_PAD_USBH1_DATA2__USBH1_DATA2,
34 MX51_PAD_USBH1_DATA3__USBH1_DATA3,
35 MX51_PAD_USBH1_DATA4__USBH1_DATA4,
36 MX51_PAD_USBH1_DATA5__USBH1_DATA5,
37 MX51_PAD_USBH1_DATA6__USBH1_DATA6,
38 MX51_PAD_USBH1_DATA7__USBH1_DATA7,
39 };
40
41 static const iomux_v3_cfg_t usb_pads[] = {
42 MX51_PAD_EIM_D27__GPIO2_9, /* USB PHY reset */
43 MX51_PAD_GPIO1_5__GPIO1_5, /* USB HUB reset */
44 NEW_PAD_CTRL(MX51_PAD_EIM_A22__GPIO2_16, 0), /* WIFI /EN */
45 NEW_PAD_CTRL(MX51_PAD_EIM_A16__GPIO2_10, 0), /* WIFI RESET */
46 NEW_PAD_CTRL(MX51_PAD_EIM_A17__GPIO2_11, 0), /* BT /EN */
47 };
48
49 imx_iomux_v3_setup_multiple_pads(usb_h1_pads, ARRAY_SIZE(usb_h1_pads));
50
51 if (machine_is_efikasb()) {
52 static const iomux_v3_cfg_t usb_h2_pads[] = {
53 MX51_PAD_EIM_A24__USBH2_CLK,
54 MX51_PAD_EIM_A25__USBH2_DIR,
55 MX51_PAD_EIM_A26__USBH2_STP,
56 MX51_PAD_EIM_A27__USBH2_NXT,
57 MX51_PAD_EIM_D16__USBH2_DATA0,
58 MX51_PAD_EIM_D17__USBH2_DATA1,
59 MX51_PAD_EIM_D18__USBH2_DATA2,
60 MX51_PAD_EIM_D19__USBH2_DATA3,
61 MX51_PAD_EIM_D20__USBH2_DATA4,
62 MX51_PAD_EIM_D21__USBH2_DATA5,
63 MX51_PAD_EIM_D22__USBH2_DATA6,
64 MX51_PAD_EIM_D23__USBH2_DATA7,
65 };
66
67 imx_iomux_v3_setup_multiple_pads(usb_h2_pads,
68 ARRAY_SIZE(usb_h2_pads));
69 }
70
71 imx_iomux_v3_setup_multiple_pads(usb_pads, ARRAY_SIZE(usb_pads));
72 }
73
74 /*
75 * Enable devices connected to USB BUSes
76 */
efika_usb_enable_devices(void)77 static void efika_usb_enable_devices(void)
78 {
79 /* Enable Bluetooth */
80 gpio_direction_output(IMX_GPIO_NR(2, 11), 0);
81 udelay(10000);
82 gpio_set_value(IMX_GPIO_NR(2, 11), 1);
83
84 /* Enable WiFi */
85 gpio_direction_output(IMX_GPIO_NR(2, 16), 1);
86 udelay(10000);
87
88 /* Reset the WiFi chip */
89 gpio_direction_output(IMX_GPIO_NR(2, 10), 0);
90 udelay(10000);
91 gpio_set_value(IMX_GPIO_NR(2, 10), 1);
92 }
93
94 /*
95 * Reset USB HUB (or HUBs on EfikaSB)
96 */
efika_usb_hub_reset(void)97 static void efika_usb_hub_reset(void)
98 {
99 /* HUB reset */
100 gpio_direction_output(IMX_GPIO_NR(1, 5), 1);
101 udelay(1000);
102 gpio_set_value(IMX_GPIO_NR(1, 5), 0);
103 udelay(1000);
104 gpio_set_value(IMX_GPIO_NR(1, 5), 1);
105 }
106
107 /*
108 * Reset USB PHY (or PHYs on EfikaSB)
109 */
efika_usb_phy_reset(void)110 static void efika_usb_phy_reset(void)
111 {
112 /* SMSC 3317 PHY reset */
113 gpio_direction_output(IMX_GPIO_NR(2, 9), 0);
114 udelay(1000);
115 gpio_set_value(IMX_GPIO_NR(2, 9), 1);
116 }
117
efika_ehci_init(struct usb_ehci * ehci,uint32_t stp_gpio,iomux_v3_cfg_t stp_pad_gpio,iomux_v3_cfg_t stp_pad_usb)118 static void efika_ehci_init(struct usb_ehci *ehci, uint32_t stp_gpio,
119 iomux_v3_cfg_t stp_pad_gpio,
120 iomux_v3_cfg_t stp_pad_usb)
121 {
122 int ret;
123 struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
124 struct ulpi_viewport ulpi_vp;
125
126 imx_iomux_v3_setup_pad(stp_pad_gpio);
127 gpio_direction_output(stp_gpio, 0);
128 udelay(1000);
129 gpio_set_value(stp_gpio, 1);
130 udelay(1000);
131
132 imx_iomux_v3_setup_pad(stp_pad_usb);
133 udelay(10000);
134
135 ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
136 ulpi_vp.port_num = 0;
137
138 ret = ulpi_init(&ulpi_vp);
139 if (ret) {
140 printf("Efika USB ULPI initialization failed\n");
141 return;
142 }
143
144 /* ULPI set flags */
145 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl,
146 ULPI_OTG_DP_PULLDOWN | ULPI_OTG_DM_PULLDOWN |
147 ULPI_OTG_EXTVBUSIND);
148 ulpi_write(&ulpi_vp, &ulpi->function_ctrl,
149 ULPI_FC_FULL_SPEED | ULPI_FC_OPMODE_NORMAL |
150 ULPI_FC_SUSPENDM);
151 ulpi_write(&ulpi_vp, &ulpi->iface_ctrl, 0);
152
153 /* Set VBus */
154 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set,
155 ULPI_OTG_DRVVBUS | ULPI_OTG_DRVVBUS_EXT);
156
157 /*
158 * Set VBusChrg
159 *
160 * NOTE: This violates USB specification, but otherwise, USB on Efika
161 * doesn't work.
162 */
163 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
164 }
165
board_ehci_hcd_init(int port)166 int board_ehci_hcd_init(int port)
167 {
168 /* Init iMX51 EHCI */
169 efika_usb_phy_reset();
170 efika_usb_hub_reset();
171 efika_usb_enable_devices();
172
173 return 0;
174 }
175
176 /* This overrides a weak function */
mx5_ehci_powerup_fixup(struct ehci_ctrl * ctrl,uint32_t * status_reg,uint32_t * reg)177 void mx5_ehci_powerup_fixup(struct ehci_ctrl *ctrl, uint32_t *status_reg,
178 uint32_t *reg)
179 {
180 uint32_t port = OTG_BASE_ADDR + (0x200 * CONFIG_MXC_USB_PORT);
181 struct usb_ehci *ehci = (struct usb_ehci *)port;
182 struct ulpi_regs *ulpi = (struct ulpi_regs *)0;
183 struct ulpi_viewport ulpi_vp;
184
185 ulpi_vp.viewport_addr = (u32)&ehci->ulpi_viewpoint;
186 ulpi_vp.port_num = 0;
187
188 ulpi_write(&ulpi_vp, &ulpi->otg_ctrl_set, ULPI_OTG_CHRGVBUS);
189
190 mdelay(50);
191
192 /* terminate the reset */
193 *reg = ehci_readl(status_reg);
194 *reg |= EHCI_PS_PE;
195 }
196
board_ehci_hcd_postinit(struct usb_ehci * ehci,int port)197 void board_ehci_hcd_postinit(struct usb_ehci *ehci, int port)
198 {
199 uint32_t tmp;
200
201 if (port == 0) {
202 /* Adjust UTMI PHY frequency to 24MHz */
203 tmp = readl(OTG_BASE_ADDR + 0x80c);
204 tmp = (tmp & ~0x3) | 0x01;
205 writel(tmp, OTG_BASE_ADDR + 0x80c);
206 } else if (port == 1) {
207 efika_ehci_init(ehci, IMX_GPIO_NR(1, 27),
208 MX51_PAD_USBH1_STP__GPIO1_27,
209 MX51_PAD_USBH1_STP__USBH1_STP);
210 } else if ((port == 2) && machine_is_efikasb()) {
211 efika_ehci_init(ehci, IMX_GPIO_NR(2, 20),
212 MX51_PAD_EIM_A26__GPIO2_20,
213 MX51_PAD_EIM_A26__USBH2_STP);
214 }
215
216 if (port)
217 mdelay(10);
218 }
219
220 /*
221 * Ethernet on the Smarttop is on the USB bus. Rather than give an error about
222 * "CPU Net Initialization Failed", just pass this test since no other settings
223 * are required. Smartbook doesn't have built-in Ethernet but we will let it
224 * pass anyway considering someone may have plugged in a USB stick and all
225 * they need to do is run "usb start".
226 */
board_eth_init(bd_t * bis)227 int board_eth_init(bd_t *bis)
228 {
229 return 0;
230 }
231