1 /*
2 * Copyright (C) 2009 Valentin Longchamp, EPFL Mobots group
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/i2c.h>
20 #include <linux/spi/spi.h>
21 #include <linux/slab.h>
22 #include <linux/platform_device.h>
23 #include <linux/types.h>
24
25 #include <linux/usb/otg.h>
26
27 #include "common.h"
28 #include "devices-imx31.h"
29 #include "ehci.h"
30 #include "hardware.h"
31 #include "iomux-mx3.h"
32 #include "ulpi.h"
33
34 static unsigned int marxbot_pins[] = {
35 /* SDHC2 */
36 MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
37 MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
38 MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
39 MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
40 /* dsPIC resets */
41 MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
42 /*battery detection */
43 MX31_PIN_LCS0__GPIO3_23,
44 /* USB H1 */
45 MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
46 MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
47 MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
48 MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
49 MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
50 /* SEL */
51 MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
52 MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
53 };
54
55 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
56 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
57
marxbot_sdhc2_get_ro(struct device * dev)58 static int marxbot_sdhc2_get_ro(struct device *dev)
59 {
60 return !gpio_get_value(SDHC2_WP);
61 }
62
marxbot_sdhc2_init(struct device * dev,irq_handler_t detect_irq,void * data)63 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
64 void *data)
65 {
66 int ret;
67
68 ret = gpio_request(SDHC2_CD, "sdhc-detect");
69 if (ret)
70 return ret;
71
72 gpio_direction_input(SDHC2_CD);
73
74 ret = gpio_request(SDHC2_WP, "sdhc-wp");
75 if (ret)
76 goto err_gpio_free;
77 gpio_direction_input(SDHC2_WP);
78
79 ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
80 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
81 "sdhc2-card-detect", data);
82 if (ret)
83 goto err_gpio_free_2;
84
85 return 0;
86
87 err_gpio_free_2:
88 gpio_free(SDHC2_WP);
89 err_gpio_free:
90 gpio_free(SDHC2_CD);
91
92 return ret;
93 }
94
marxbot_sdhc2_exit(struct device * dev,void * data)95 static void marxbot_sdhc2_exit(struct device *dev, void *data)
96 {
97 free_irq(gpio_to_irq(SDHC2_CD), data);
98 gpio_free(SDHC2_WP);
99 gpio_free(SDHC2_CD);
100 }
101
102 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
103 .get_ro = marxbot_sdhc2_get_ro,
104 .init = marxbot_sdhc2_init,
105 .exit = marxbot_sdhc2_exit,
106 };
107
108 #define TRSLAT_RST_B IOMUX_TO_GPIO(MX31_PIN_STXD5)
109 #define DSPICS_RST_B IOMUX_TO_GPIO(MX31_PIN_SRXD5)
110
dspics_resets_init(void)111 static void dspics_resets_init(void)
112 {
113 if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
114 gpio_direction_output(TRSLAT_RST_B, 0);
115 gpio_export(TRSLAT_RST_B, false);
116 }
117
118 if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
119 gpio_direction_output(DSPICS_RST_B, 0);
120 gpio_export(DSPICS_RST_B, false);
121 }
122 }
123
124 static struct spi_board_info marxbot_spi_board_info[] __initdata = {
125 {
126 .modalias = "spidev",
127 .max_speed_hz = 300000,
128 .bus_num = 1,
129 .chip_select = 1, /* according spi1_cs[] ! */
130 },
131 };
132
133 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
134 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
135 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
136 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
137
marxbot_init_sel_gpios(void)138 static void marxbot_init_sel_gpios(void)
139 {
140 if (!gpio_request(SEL0, "sel0")) {
141 gpio_direction_input(SEL0);
142 gpio_export(SEL0, true);
143 }
144
145 if (!gpio_request(SEL1, "sel1")) {
146 gpio_direction_input(SEL1);
147 gpio_export(SEL1, true);
148 }
149
150 if (!gpio_request(SEL2, "sel2")) {
151 gpio_direction_input(SEL2);
152 gpio_export(SEL2, true);
153 }
154
155 if (!gpio_request(SEL3, "sel3")) {
156 gpio_direction_input(SEL3);
157 gpio_export(SEL3, true);
158 }
159 }
160
161 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
162 PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
163
marxbot_usbh1_hw_init(struct platform_device * pdev)164 static int marxbot_usbh1_hw_init(struct platform_device *pdev)
165 {
166 mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
167
168 mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
169 mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
170 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
171 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
172 mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
173 mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
174 mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
175 mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
176
177 mdelay(10);
178
179 return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
180 MXC_EHCI_INTERFACE_SINGLE_UNI);
181 }
182
183 #define USBH1_VBUSEN_B IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
184 #define USBH1_MODE IOMUX_TO_GPIO(MX31_PIN_NFALE)
185
marxbot_isp1105_init(struct usb_phy * otg)186 static int marxbot_isp1105_init(struct usb_phy *otg)
187 {
188 int ret = gpio_request(USBH1_MODE, "usbh1-mode");
189 if (ret)
190 return ret;
191 /* single ended */
192 gpio_direction_output(USBH1_MODE, 0);
193
194 ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
195 if (ret) {
196 gpio_free(USBH1_MODE);
197 return ret;
198 }
199 gpio_direction_output(USBH1_VBUSEN_B, 1);
200
201 return 0;
202 }
203
204
marxbot_isp1105_set_vbus(struct usb_otg * otg,bool on)205 static int marxbot_isp1105_set_vbus(struct usb_otg *otg, bool on)
206 {
207 if (on)
208 gpio_set_value(USBH1_VBUSEN_B, 0);
209 else
210 gpio_set_value(USBH1_VBUSEN_B, 1);
211
212 return 0;
213 }
214
215 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
216 .init = marxbot_usbh1_hw_init,
217 .portsc = MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
218 };
219
marxbot_usbh1_init(void)220 static int __init marxbot_usbh1_init(void)
221 {
222 struct usb_phy *phy;
223 struct platform_device *pdev;
224
225 phy = kzalloc(sizeof(*phy), GFP_KERNEL);
226 if (!phy)
227 return -ENOMEM;
228
229 phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
230 if (!phy->otg) {
231 kfree(phy);
232 return -ENOMEM;
233 }
234
235 phy->label = "ISP1105";
236 phy->init = marxbot_isp1105_init;
237 phy->otg->set_vbus = marxbot_isp1105_set_vbus;
238
239 usbh1_pdata.otg = phy;
240
241 pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
242
243 return PTR_ERR_OR_ZERO(pdev);
244 }
245
246 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
247 .operating_mode = FSL_USB2_DR_DEVICE,
248 .phy_mode = FSL_USB2_PHY_ULPI,
249 };
250
251 /*
252 * system init for baseboard usage. Will be called by mx31moboard init.
253 */
mx31moboard_marxbot_init(void)254 void __init mx31moboard_marxbot_init(void)
255 {
256 printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
257
258 mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
259 "marxbot");
260
261 marxbot_init_sel_gpios();
262
263 dspics_resets_init();
264
265 imx31_add_mxc_mmc(1, &sdhc2_pdata);
266
267 spi_register_board_info(marxbot_spi_board_info,
268 ARRAY_SIZE(marxbot_spi_board_info));
269
270 /* battery present pin */
271 gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
272 gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
273 gpio_export(IOMUX_TO_GPIO(MX31_PIN_LCS0), false);
274
275 imx31_add_fsl_usb2_udc(&usb_pdata);
276
277 marxbot_usbh1_init();
278 }
279