1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
4 */
5
6 #include <linux/delay.h>
7 #include <linux/gpio.h>
8 #include <linux/init.h>
9 #include <linux/interrupt.h>
10 #include <linux/i2c.h>
11 #include <linux/spi/spi.h>
12 #include <linux/slab.h>
13 #include <linux/platform_device.h>
14 #include <linux/types.h>
15
16 #include <linux/usb/otg.h>
17
18 #include "board-mx31moboard.h"
19 #include "common.h"
20 #include "devices-imx31.h"
21 #include "ehci.h"
22 #include "hardware.h"
23 #include "iomux-mx3.h"
24 #include "ulpi.h"
25
26 static unsigned int marxbot_pins[] = {
27 /* SDHC2 */
28 MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
29 MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
30 MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
31 MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
32 /* dsPIC resets */
33 MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
34 /*battery detection */
35 MX31_PIN_LCS0__GPIO3_23,
36 /* USB H1 */
37 MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
38 MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
39 MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
40 MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
41 MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
42 /* SEL */
43 MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
44 MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
45 };
46
47 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
48 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
49
marxbot_sdhc2_get_ro(struct device * dev)50 static int marxbot_sdhc2_get_ro(struct device *dev)
51 {
52 return !gpio_get_value(SDHC2_WP);
53 }
54
marxbot_sdhc2_init(struct device * dev,irq_handler_t detect_irq,void * data)55 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
56 void *data)
57 {
58 int ret;
59
60 ret = gpio_request(SDHC2_CD, "sdhc-detect");
61 if (ret)
62 return ret;
63
64 gpio_direction_input(SDHC2_CD);
65
66 ret = gpio_request(SDHC2_WP, "sdhc-wp");
67 if (ret)
68 goto err_gpio_free;
69 gpio_direction_input(SDHC2_WP);
70
71 ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
72 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
73 "sdhc2-card-detect", data);
74 if (ret)
75 goto err_gpio_free_2;
76
77 return 0;
78
79 err_gpio_free_2:
80 gpio_free(SDHC2_WP);
81 err_gpio_free:
82 gpio_free(SDHC2_CD);
83
84 return ret;
85 }
86
marxbot_sdhc2_exit(struct device * dev,void * data)87 static void marxbot_sdhc2_exit(struct device *dev, void *data)
88 {
89 free_irq(gpio_to_irq(SDHC2_CD), data);
90 gpio_free(SDHC2_WP);
91 gpio_free(SDHC2_CD);
92 }
93
94 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
95 .get_ro = marxbot_sdhc2_get_ro,
96 .init = marxbot_sdhc2_init,
97 .exit = marxbot_sdhc2_exit,
98 };
99
100 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_STXD5)
101 #define DSPICS_RST_B IOMUX_TO_GPIO(MX31_PIN_SRXD5)
102
dspics_resets_init(void)103 static void dspics_resets_init(void)
104 {
105 if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
106 gpio_direction_output(TRSLAT_RST_B, 0);
107 gpio_export(TRSLAT_RST_B, false);
108 }
109
110 if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
111 gpio_direction_output(DSPICS_RST_B, 0);
112 gpio_export(DSPICS_RST_B, false);
113 }
114 }
115
116 static struct spi_board_info marxbot_spi_board_info[] __initdata = {
117 {
118 .modalias = "spidev",
119 .max_speed_hz = 300000,
120 .bus_num = 1,
121 .chip_select = 1, /* according spi1_cs[] ! */
122 },
123 };
124
125 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
126 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
127 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
128 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
129
marxbot_init_sel_gpios(void)130 static void marxbot_init_sel_gpios(void)
131 {
132 if (!gpio_request(SEL0, "sel0")) {
133 gpio_direction_input(SEL0);
134 gpio_export(SEL0, true);
135 }
136
137 if (!gpio_request(SEL1, "sel1")) {
138 gpio_direction_input(SEL1);
139 gpio_export(SEL1, true);
140 }
141
142 if (!gpio_request(SEL2, "sel2")) {
143 gpio_direction_input(SEL2);
144 gpio_export(SEL2, true);
145 }
146
147 if (!gpio_request(SEL3, "sel3")) {
148 gpio_direction_input(SEL3);
149 gpio_export(SEL3, true);
150 }
151 }
152
153 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
154 PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
155
marxbot_usbh1_hw_init(struct platform_device * pdev)156 static int marxbot_usbh1_hw_init(struct platform_device *pdev)
157 {
158 mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
159
160 mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
161 mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
162 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
163 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
164 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
165 mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
166 mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
167 mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
168
169 mdelay(10);
170
171 return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
172 MXC_EHCI_INTERFACE_SINGLE_UNI);
173 }
174
175 #define USBH1_VBUSEN_B IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
176 #define USBH1_MODE IOMUX_TO_GPIO(MX31_PIN_NFALE)
177
marxbot_isp1105_init(struct usb_phy * otg)178 static int marxbot_isp1105_init(struct usb_phy *otg)
179 {
180 int ret = gpio_request(USBH1_MODE, "usbh1-mode");
181 if (ret)
182 return ret;
183 /* single ended */
184 gpio_direction_output(USBH1_MODE, 0);
185
186 ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
187 if (ret) {
188 gpio_free(USBH1_MODE);
189 return ret;
190 }
191 gpio_direction_output(USBH1_VBUSEN_B, 1);
192
193 return 0;
194 }
195
196
marxbot_isp1105_set_vbus(struct usb_otg * otg,bool on)197 static int marxbot_isp1105_set_vbus(struct usb_otg *otg, bool on)
198 {
199 if (on)
200 gpio_set_value(USBH1_VBUSEN_B, 0);
201 else
202 gpio_set_value(USBH1_VBUSEN_B, 1);
203
204 return 0;
205 }
206
207 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
208 .init = marxbot_usbh1_hw_init,
209 .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
210 };
211
marxbot_usbh1_init(void)212 static int __init marxbot_usbh1_init(void)
213 {
214 struct usb_phy *phy;
215 struct platform_device *pdev;
216
217 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
218 if (!phy)
219 return -ENOMEM;
220
221 phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
222 if (!phy->otg) {
223 kfree(phy);
224 return -ENOMEM;
225 }
226
227 phy->label = "ISP1105";
228 phy->init = marxbot_isp1105_init;
229 phy->otg->set_vbus = marxbot_isp1105_set_vbus;
230
231 usbh1_pdata.otg = phy;
232
233 pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
234
235 return PTR_ERR_OR_ZERO(pdev);
236 }
237
238 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
239 .operating_mode = FSL_USB2_DR_DEVICE,
240 .phy_mode = FSL_USB2_PHY_ULPI,
241 };
242
243 /*
244 * system init for baseboard usage. Will be called by mx31moboard init.
245 */
mx31moboard_marxbot_init(void)246 void __init mx31moboard_marxbot_init(void)
247 {
248 printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
249
250 mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
251 "marxbot");
252
253 marxbot_init_sel_gpios();
254
255 dspics_resets_init();
256
257 imx31_add_mxc_mmc(1, &sdhc2_pdata);
258
259 spi_register_board_info(marxbot_spi_board_info,
260 ARRAY_SIZE(marxbot_spi_board_info));
261
262 /* battery present pin */
263 gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
264 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
265 gpio_export(IOMUX_TO_GPIO(MX31_PIN_LCS0), false);
266
267 imx31_add_fsl_usb2_udc(&usb_pdata);
268
269 marxbot_usbh1_init();
270 }
271
