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 <mach/common.h>
28 #include <mach/hardware.h>
29 #include <mach/iomux-mx3.h>
30 #include <mach/ulpi.h>
31 
32 #include <media/soc_camera.h>
33 
34 #include "devices-imx31.h"
35 
36 static unsigned int marxbot_pins[] = {
37 	/* SDHC2 */
38 	MX31_PIN_PC_PWRON__SD2_DATA3, MX31_PIN_PC_VS1__SD2_DATA2,
39 	MX31_PIN_PC_READY__SD2_DATA1, MX31_PIN_PC_WAIT_B__SD2_DATA0,
40 	MX31_PIN_PC_CD2_B__SD2_CLK, MX31_PIN_PC_CD1_B__SD2_CMD,
41 	MX31_PIN_ATA_DIOR__GPIO3_28, MX31_PIN_ATA_DIOW__GPIO3_29,
42 	/* CSI */
43 	MX31_PIN_CSI_D6__CSI_D6, MX31_PIN_CSI_D7__CSI_D7,
44 	MX31_PIN_CSI_D8__CSI_D8, MX31_PIN_CSI_D9__CSI_D9,
45 	MX31_PIN_CSI_D10__CSI_D10, MX31_PIN_CSI_D11__CSI_D11,
46 	MX31_PIN_CSI_D12__CSI_D12, MX31_PIN_CSI_D13__CSI_D13,
47 	MX31_PIN_CSI_D14__CSI_D14, MX31_PIN_CSI_D15__CSI_D15,
48 	MX31_PIN_CSI_HSYNC__CSI_HSYNC, MX31_PIN_CSI_MCLK__CSI_MCLK,
49 	MX31_PIN_CSI_PIXCLK__CSI_PIXCLK, MX31_PIN_CSI_VSYNC__CSI_VSYNC,
50 	MX31_PIN_CSI_D4__GPIO3_4, MX31_PIN_CSI_D5__GPIO3_5,
51 	MX31_PIN_GPIO3_0__GPIO3_0, MX31_PIN_GPIO3_1__GPIO3_1,
52 	MX31_PIN_TXD2__GPIO1_28,
53 	/* dsPIC resets */
54 	MX31_PIN_STXD5__GPIO1_21, MX31_PIN_SRXD5__GPIO1_22,
55 	/*battery detection */
56 	MX31_PIN_LCS0__GPIO3_23,
57 	/* USB H1 */
58 	MX31_PIN_CSPI1_MISO__USBH1_RXDP, MX31_PIN_CSPI1_MOSI__USBH1_RXDM,
59 	MX31_PIN_CSPI1_SS0__USBH1_TXDM, MX31_PIN_CSPI1_SS1__USBH1_TXDP,
60 	MX31_PIN_CSPI1_SS2__USBH1_RCV, MX31_PIN_CSPI1_SCLK__USBH1_OEB,
61 	MX31_PIN_CSPI1_SPI_RDY__USBH1_FS, MX31_PIN_SFS6__USBH1_SUSPEND,
62 	MX31_PIN_NFRE_B__GPIO1_11, MX31_PIN_NFALE__GPIO1_12,
63 	/* SEL */
64 	MX31_PIN_DTR_DCE1__GPIO2_8, MX31_PIN_DSR_DCE1__GPIO2_9,
65 	MX31_PIN_RI_DCE1__GPIO2_10, MX31_PIN_DCD_DCE1__GPIO2_11,
66 };
67 
68 #define SDHC2_CD IOMUX_TO_GPIO(MX31_PIN_ATA_DIOR)
69 #define SDHC2_WP IOMUX_TO_GPIO(MX31_PIN_ATA_DIOW)
70 
marxbot_sdhc2_get_ro(struct device * dev)71 static int marxbot_sdhc2_get_ro(struct device *dev)
72 {
73 	return !gpio_get_value(SDHC2_WP);
74 }
75 
marxbot_sdhc2_init(struct device * dev,irq_handler_t detect_irq,void * data)76 static int marxbot_sdhc2_init(struct device *dev, irq_handler_t detect_irq,
77 		void *data)
78 {
79 	int ret;
80 
81 	ret = gpio_request(SDHC2_CD, "sdhc-detect");
82 	if (ret)
83 		return ret;
84 
85 	gpio_direction_input(SDHC2_CD);
86 
87 	ret = gpio_request(SDHC2_WP, "sdhc-wp");
88 	if (ret)
89 		goto err_gpio_free;
90 	gpio_direction_input(SDHC2_WP);
91 
92 	ret = request_irq(gpio_to_irq(SDHC2_CD), detect_irq,
93 		IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
94 		"sdhc2-card-detect", data);
95 	if (ret)
96 		goto err_gpio_free_2;
97 
98 	return 0;
99 
100 err_gpio_free_2:
101 	gpio_free(SDHC2_WP);
102 err_gpio_free:
103 	gpio_free(SDHC2_CD);
104 
105 	return ret;
106 }
107 
marxbot_sdhc2_exit(struct device * dev,void * data)108 static void marxbot_sdhc2_exit(struct device *dev, void *data)
109 {
110 	free_irq(gpio_to_irq(SDHC2_CD), data);
111 	gpio_free(SDHC2_WP);
112 	gpio_free(SDHC2_CD);
113 }
114 
115 static const struct imxmmc_platform_data sdhc2_pdata __initconst = {
116 	.get_ro	= marxbot_sdhc2_get_ro,
117 	.init	= marxbot_sdhc2_init,
118 	.exit	= marxbot_sdhc2_exit,
119 };
120 
121 #define TRSLAT_RST_B	IOMUX_TO_GPIO(MX31_PIN_STXD5)
122 #define DSPICS_RST_B	IOMUX_TO_GPIO(MX31_PIN_SRXD5)
123 
dspics_resets_init(void)124 static void dspics_resets_init(void)
125 {
126 	if (!gpio_request(TRSLAT_RST_B, "translator-rst")) {
127 		gpio_direction_output(TRSLAT_RST_B, 0);
128 		gpio_export(TRSLAT_RST_B, false);
129 	}
130 
131 	if (!gpio_request(DSPICS_RST_B, "dspics-rst")) {
132 		gpio_direction_output(DSPICS_RST_B, 0);
133 		gpio_export(DSPICS_RST_B, false);
134 	}
135 }
136 
137 static struct spi_board_info marxbot_spi_board_info[] __initdata = {
138 	{
139 		.modalias = "spidev",
140 		.max_speed_hz = 300000,
141 		.bus_num = 1,
142 		.chip_select = 1, /* according spi1_cs[] ! */
143 	},
144 };
145 
146 #define TURRETCAM_POWER	IOMUX_TO_GPIO(MX31_PIN_GPIO3_1)
147 #define BASECAM_POWER	IOMUX_TO_GPIO(MX31_PIN_CSI_D5)
148 #define TURRETCAM_RST_B	IOMUX_TO_GPIO(MX31_PIN_GPIO3_0)
149 #define BASECAM_RST_B	IOMUX_TO_GPIO(MX31_PIN_CSI_D4)
150 #define CAM_CHOICE	IOMUX_TO_GPIO(MX31_PIN_TXD2)
151 
marxbot_basecam_power(struct device * dev,int on)152 static int marxbot_basecam_power(struct device *dev, int on)
153 {
154 	gpio_set_value(BASECAM_POWER, !on);
155 	return 0;
156 }
157 
marxbot_basecam_reset(struct device * dev)158 static int marxbot_basecam_reset(struct device *dev)
159 {
160 	gpio_set_value(BASECAM_RST_B, 0);
161 	udelay(100);
162 	gpio_set_value(BASECAM_RST_B, 1);
163 	return 0;
164 }
165 
166 static struct i2c_board_info marxbot_i2c_devices[] = {
167 	{
168 		I2C_BOARD_INFO("mt9t031", 0x5d),
169 	},
170 };
171 
172 static struct soc_camera_link base_iclink = {
173 	.bus_id		= 0,		/* Must match with the camera ID */
174 	.power		= marxbot_basecam_power,
175 	.reset		= marxbot_basecam_reset,
176 	.board_info	= &marxbot_i2c_devices[0],
177 	.i2c_adapter_id	= 0,
178 };
179 
180 static struct platform_device marxbot_camera[] = {
181 	{
182 		.name	= "soc-camera-pdrv",
183 		.id	= 0,
184 		.dev	= {
185 			.platform_data = &base_iclink,
186 		},
187 	},
188 };
189 
190 static struct platform_device *marxbot_cameras[] __initdata = {
191 	&marxbot_camera[0],
192 };
193 
marxbot_cam_init(void)194 static int __init marxbot_cam_init(void)
195 {
196 	int ret = gpio_request(CAM_CHOICE, "cam-choice");
197 	if (ret)
198 		return ret;
199 	gpio_direction_output(CAM_CHOICE, 0);
200 
201 	ret = gpio_request(BASECAM_RST_B, "basecam-reset");
202 	if (ret)
203 		return ret;
204 	gpio_direction_output(BASECAM_RST_B, 1);
205 	ret = gpio_request(BASECAM_POWER, "basecam-standby");
206 	if (ret)
207 		return ret;
208 	gpio_direction_output(BASECAM_POWER, 0);
209 
210 	ret = gpio_request(TURRETCAM_RST_B, "turretcam-reset");
211 	if (ret)
212 		return ret;
213 	gpio_direction_output(TURRETCAM_RST_B, 1);
214 	ret = gpio_request(TURRETCAM_POWER, "turretcam-standby");
215 	if (ret)
216 		return ret;
217 	gpio_direction_output(TURRETCAM_POWER, 0);
218 
219 	return 0;
220 }
221 
222 #define SEL0 IOMUX_TO_GPIO(MX31_PIN_DTR_DCE1)
223 #define SEL1 IOMUX_TO_GPIO(MX31_PIN_DSR_DCE1)
224 #define SEL2 IOMUX_TO_GPIO(MX31_PIN_RI_DCE1)
225 #define SEL3 IOMUX_TO_GPIO(MX31_PIN_DCD_DCE1)
226 
marxbot_init_sel_gpios(void)227 static void marxbot_init_sel_gpios(void)
228 {
229 	if (!gpio_request(SEL0, "sel0")) {
230 		gpio_direction_input(SEL0);
231 		gpio_export(SEL0, true);
232 	}
233 
234 	if (!gpio_request(SEL1, "sel1")) {
235 		gpio_direction_input(SEL1);
236 		gpio_export(SEL1, true);
237 	}
238 
239 	if (!gpio_request(SEL2, "sel2")) {
240 		gpio_direction_input(SEL2);
241 		gpio_export(SEL2, true);
242 	}
243 
244 	if (!gpio_request(SEL3, "sel3")) {
245 		gpio_direction_input(SEL3);
246 		gpio_export(SEL3, true);
247 	}
248 }
249 
250 #define USB_PAD_CFG (PAD_CTL_DRV_MAX | PAD_CTL_SRE_FAST | PAD_CTL_HYS_CMOS | \
251 			PAD_CTL_ODE_CMOS | PAD_CTL_100K_PU)
252 
marxbot_usbh1_hw_init(struct platform_device * pdev)253 static int marxbot_usbh1_hw_init(struct platform_device *pdev)
254 {
255 	mxc_iomux_set_gpr(MUX_PGP_USB_SUSPEND, true);
256 
257 	mxc_iomux_set_pad(MX31_PIN_CSPI1_MISO, USB_PAD_CFG);
258 	mxc_iomux_set_pad(MX31_PIN_CSPI1_MOSI, USB_PAD_CFG);
259 	mxc_iomux_set_pad(MX31_PIN_CSPI1_SS0, USB_PAD_CFG);
260 	mxc_iomux_set_pad(MX31_PIN_CSPI1_SS1, USB_PAD_CFG);
261 	mxc_iomux_set_pad(MX31_PIN_CSPI1_SS2, USB_PAD_CFG);
262 	mxc_iomux_set_pad(MX31_PIN_CSPI1_SCLK, USB_PAD_CFG);
263 	mxc_iomux_set_pad(MX31_PIN_CSPI1_SPI_RDY, USB_PAD_CFG);
264 	mxc_iomux_set_pad(MX31_PIN_SFS6, USB_PAD_CFG);
265 
266 	mdelay(10);
267 
268 	return mx31_initialize_usb_hw(pdev->id, MXC_EHCI_POWER_PINS_ENABLED |
269 			MXC_EHCI_INTERFACE_SINGLE_UNI);
270 }
271 
272 #define USBH1_VBUSEN_B	IOMUX_TO_GPIO(MX31_PIN_NFRE_B)
273 #define USBH1_MODE	IOMUX_TO_GPIO(MX31_PIN_NFALE)
274 
marxbot_isp1105_init(struct usb_phy * otg)275 static int marxbot_isp1105_init(struct usb_phy *otg)
276 {
277 	int ret = gpio_request(USBH1_MODE, "usbh1-mode");
278 	if (ret)
279 		return ret;
280 	/* single ended */
281 	gpio_direction_output(USBH1_MODE, 0);
282 
283 	ret = gpio_request(USBH1_VBUSEN_B, "usbh1-vbusen");
284 	if (ret) {
285 		gpio_free(USBH1_MODE);
286 		return ret;
287 	}
288 	gpio_direction_output(USBH1_VBUSEN_B, 1);
289 
290 	return 0;
291 }
292 
293 
marxbot_isp1105_set_vbus(struct usb_otg * otg,bool on)294 static int marxbot_isp1105_set_vbus(struct usb_otg *otg, bool on)
295 {
296 	if (on)
297 		gpio_set_value(USBH1_VBUSEN_B, 0);
298 	else
299 		gpio_set_value(USBH1_VBUSEN_B, 1);
300 
301 	return 0;
302 }
303 
304 static struct mxc_usbh_platform_data usbh1_pdata __initdata = {
305 	.init	= marxbot_usbh1_hw_init,
306 	.portsc	= MXC_EHCI_MODE_UTMI | MXC_EHCI_SERIAL,
307 };
308 
marxbot_usbh1_init(void)309 static int __init marxbot_usbh1_init(void)
310 {
311 	struct usb_phy *phy;
312 	struct platform_device *pdev;
313 
314 	phy = kzalloc(sizeof(*phy), GFP_KERNEL);
315 	if (!phy)
316 		return -ENOMEM;
317 
318 	phy->otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL);
319 	if (!phy->otg) {
320 		kfree(phy);
321 		return -ENOMEM;
322 	}
323 
324 	phy->label	= "ISP1105";
325 	phy->init	= marxbot_isp1105_init;
326 	phy->otg->set_vbus	= marxbot_isp1105_set_vbus;
327 
328 	usbh1_pdata.otg = phy;
329 
330 	pdev = imx31_add_mxc_ehci_hs(1, &usbh1_pdata);
331 	if (IS_ERR(pdev))
332 		return PTR_ERR(pdev);
333 
334 	return 0;
335 }
336 
337 static const struct fsl_usb2_platform_data usb_pdata __initconst = {
338 	.operating_mode	= FSL_USB2_DR_DEVICE,
339 	.phy_mode	= FSL_USB2_PHY_ULPI,
340 };
341 
342 /*
343  * system init for baseboard usage. Will be called by mx31moboard init.
344  */
mx31moboard_marxbot_init(void)345 void __init mx31moboard_marxbot_init(void)
346 {
347 	printk(KERN_INFO "Initializing mx31marxbot peripherals\n");
348 
349 	mxc_iomux_setup_multiple_pins(marxbot_pins, ARRAY_SIZE(marxbot_pins),
350 		"marxbot");
351 
352 	marxbot_init_sel_gpios();
353 
354 	dspics_resets_init();
355 
356 	imx31_add_mxc_mmc(1, &sdhc2_pdata);
357 
358 	spi_register_board_info(marxbot_spi_board_info,
359 		ARRAY_SIZE(marxbot_spi_board_info));
360 
361 	marxbot_cam_init();
362 	platform_add_devices(marxbot_cameras, ARRAY_SIZE(marxbot_cameras));
363 
364 	/* battery present pin */
365 	gpio_request(IOMUX_TO_GPIO(MX31_PIN_LCS0), "bat-present");
366 	gpio_direction_input(IOMUX_TO_GPIO(MX31_PIN_LCS0));
367 	gpio_export(IOMUX_TO_GPIO(MX31_PIN_LCS0), false);
368 
369 	imx31_add_fsl_usb2_udc(&usb_pdata);
370 
371 	marxbot_usbh1_init();
372 }
373