1. 根目录:
2. arch
3. arm
4. mach-omap2
5. devices.c

/*
 * linux/arch/arm/mach-omap2/devices.c
 *
 * OMAP2 platform device setup/initialization
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */
#include <linux/gpio.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/pinctrl/machine.h>
#include <linux/platform_data/omap4-keypad.h>
#include <linux/platform_data/omap_ocp2scp.h>
#include <linux/usb/omap_control_usb.h>

#include <asm/mach-types.h>
#include <asm/mach/map.h>

#include <linux/omap-dma.h>

#include "iomap.h"
#include "omap_hwmod.h"
#include "omap_device.h"
#include "omap4-keypad.h"

#include "soc.h"
#include "common.h"
#include "mux.h"
#include "control.h"
#include "devices.h"
#include "dma.h"

#define L3_MODULES_MAX_LEN 12
#define L3_MODULES 3

static int __init omap3_l3_init(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;
	char oh_name[L3_MODULES_MAX_LEN];

	/*
	 * To avoid code running on other OMAPs in
	 * multi-omap builds
	 */
	if (!(cpu_is_omap34xx()))
		return -ENODEV;

	snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main");

	oh = omap_hwmod_lookup(oh_name);

	if (!oh)
		pr_err("could not look up %s\n", oh_name);

	pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0);

	WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);

	return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;
}
omap_postcore_initcall(omap3_l3_init);

static int __init omap4_l3_init(void)
{
	int i;
	struct omap_hwmod *oh[3];
	struct platform_device *pdev;
	char oh_name[L3_MODULES_MAX_LEN];

	/* If dtb is there, the devices will be created dynamically */
	if (of_have_populated_dt())
		return -ENODEV;

	/*
	 * To avoid code running on other OMAPs in
	 * multi-omap builds
	 */
	if (!cpu_is_omap44xx() && !soc_is_omap54xx())
		return -ENODEV;

	for (i = 0; i < L3_MODULES; i++) {
		snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main_%d", i+1);

		oh[i] = omap_hwmod_lookup(oh_name);
		if (!(oh[i]))
			pr_err("could not look up %s\n", oh_name);
	}

	pdev = omap_device_build_ss("omap_l3_noc", 0, oh, 3, NULL, 0);

	WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);

	return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;
}
omap_postcore_initcall(omap4_l3_init);

#if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)

static struct resource omap2cam_resources[] = {
	{
		.start		= OMAP24XX_CAMERA_BASE,
		.end		= OMAP24XX_CAMERA_BASE + 0xfff,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= 24 + OMAP_INTC_START,
		.flags		= IORESOURCE_IRQ,
	}
};

static struct platform_device omap2cam_device = {
	.name		= "omap24xxcam",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(omap2cam_resources),
	.resource	= omap2cam_resources,
};
#endif

#if defined(CONFIG_IOMMU_API)

#include <linux/platform_data/iommu-omap.h>

static struct resource omap3isp_resources[] = {
	{
		.start		= OMAP3430_ISP_BASE,
		.end		= OMAP3430_ISP_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_CCP2_BASE,
		.end		= OMAP3430_ISP_CCP2_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_CCDC_BASE,
		.end		= OMAP3430_ISP_CCDC_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_HIST_BASE,
		.end		= OMAP3430_ISP_HIST_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_H3A_BASE,
		.end		= OMAP3430_ISP_H3A_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_PREV_BASE,
		.end		= OMAP3430_ISP_PREV_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_RESZ_BASE,
		.end		= OMAP3430_ISP_RESZ_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_SBL_BASE,
		.end		= OMAP3430_ISP_SBL_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_CSI2A_REGS1_BASE,
		.end		= OMAP3430_ISP_CSI2A_REGS1_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3430_ISP_CSIPHY2_BASE,
		.end		= OMAP3430_ISP_CSIPHY2_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3630_ISP_CSI2A_REGS2_BASE,
		.end		= OMAP3630_ISP_CSI2A_REGS2_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3630_ISP_CSI2C_REGS1_BASE,
		.end		= OMAP3630_ISP_CSI2C_REGS1_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3630_ISP_CSIPHY1_BASE,
		.end		= OMAP3630_ISP_CSIPHY1_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP3630_ISP_CSI2C_REGS2_BASE,
		.end		= OMAP3630_ISP_CSI2C_REGS2_END,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP343X_CTRL_BASE + OMAP343X_CONTROL_CSIRXFE,
		.end		= OMAP343X_CTRL_BASE + OMAP343X_CONTROL_CSIRXFE + 3,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= OMAP343X_CTRL_BASE + OMAP3630_CONTROL_CAMERA_PHY_CTRL,
		.end		= OMAP343X_CTRL_BASE + OMAP3630_CONTROL_CAMERA_PHY_CTRL + 3,
		.flags		= IORESOURCE_MEM,
	},
	{
		.start		= 24 + OMAP_INTC_START,
		.flags		= IORESOURCE_IRQ,
	}
};

static struct platform_device omap3isp_device = {
	.name		= "omap3isp",
	.id		= -1,
	.num_resources	= ARRAY_SIZE(omap3isp_resources),
	.resource	= omap3isp_resources,
};

static struct omap_iommu_arch_data omap3_isp_iommu = {
	.name = "mmu_isp",
};

int omap3_init_camera(struct isp_platform_data *pdata)
{
	omap3isp_device.dev.platform_data = pdata;
	omap3isp_device.dev.archdata.iommu = &omap3_isp_iommu;

	return platform_device_register(&omap3isp_device);
}

#else /* !CONFIG_IOMMU_API */

int omap3_init_camera(struct isp_platform_data *pdata)
{
	return 0;
}

#endif

static inline void omap_init_camera(void)
{
#if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)
	if (cpu_is_omap24xx())
		platform_device_register(&omap2cam_device);
#endif
}

#if IS_ENABLED(CONFIG_OMAP_CONTROL_USB)
static struct omap_control_usb_platform_data omap4_control_usb_pdata = {
	.type = 1,
};

struct resource omap4_control_usb_res[] = {
	{
		.name	= "control_dev_conf",
		.start	= 0x4a002300,
		.end	= 0x4a002303,
		.flags	= IORESOURCE_MEM,
	},
	{
		.name	= "otghs_control",
		.start	= 0x4a00233c,
		.end	= 0x4a00233f,
		.flags	= IORESOURCE_MEM,
	},
};

static struct platform_device omap4_control_usb = {
	.name = "omap-control-usb",
	.id = -1,
	.dev = {
		.platform_data = &omap4_control_usb_pdata,
	},
	.num_resources = 2,
	.resource = omap4_control_usb_res,
};

static inline void __init omap_init_control_usb(void)
{
	if (!cpu_is_omap44xx())
		return;

	if (platform_device_register(&omap4_control_usb))
		pr_err("Error registering omap_control_usb device\n");
}

#else
static inline void omap_init_control_usb(void) { }
#endif /* CONFIG_OMAP_CONTROL_USB */

int __init omap4_keyboard_init(struct omap4_keypad_platform_data
			*sdp4430_keypad_data, struct omap_board_data *bdata)
{
	struct platform_device *pdev;
	struct omap_hwmod *oh;
	struct omap4_keypad_platform_data *keypad_data;
	unsigned int id = -1;
	char *oh_name = "kbd";
	char *name = "omap4-keypad";

	oh = omap_hwmod_lookup(oh_name);
	if (!oh) {
		pr_err("Could not look up %s\n", oh_name);
		return -ENODEV;
	}

	keypad_data = sdp4430_keypad_data;

	pdev = omap_device_build(name, id, oh, keypad_data,
				 sizeof(struct omap4_keypad_platform_data));

	if (IS_ERR(pdev)) {
		WARN(1, "Can't build omap_device for %s:%s.\n",
						name, oh->name);
		return PTR_ERR(pdev);
	}
	oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);

	return 0;
}

#if defined(CONFIG_OMAP_MBOX_FWK) || defined(CONFIG_OMAP_MBOX_FWK_MODULE)
static inline void __init omap_init_mbox(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("mailbox");
	if (!oh) {
		pr_err("%s: unable to find hwmod\n", __func__);
		return;
	}

	pdev = omap_device_build("omap-mailbox", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "%s: could not build device, err %ld\n",
						__func__, PTR_ERR(pdev));
}
#else
static inline void omap_init_mbox(void) { }
#endif /* CONFIG_OMAP_MBOX_FWK */

static inline void omap_init_sti(void) {}

#if defined(CONFIG_SND_SOC) || defined(CONFIG_SND_SOC_MODULE)

static struct platform_device omap_pcm = {
	.name	= "omap-pcm-audio",
	.id	= -1,
};

static void omap_init_audio(void)
{
	platform_device_register(&omap_pcm);
}

#else
static inline void omap_init_audio(void) {}
#endif

#if defined(CONFIG_SND_OMAP_SOC_MCPDM) || \
		defined(CONFIG_SND_OMAP_SOC_MCPDM_MODULE)

static void __init omap_init_mcpdm(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("mcpdm");
	if (!oh) {
		printk(KERN_ERR "Could not look up mcpdm hw_mod\n");
		return;
	}

	pdev = omap_device_build("omap-mcpdm", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "Can't build omap_device for omap-mcpdm.\n");
}
#else
static inline void omap_init_mcpdm(void) {}
#endif

#if defined(CONFIG_SND_OMAP_SOC_DMIC) || \
		defined(CONFIG_SND_OMAP_SOC_DMIC_MODULE)

static void __init omap_init_dmic(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("dmic");
	if (!oh) {
		pr_err("Could not look up dmic hw_mod\n");
		return;
	}

	pdev = omap_device_build("omap-dmic", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "Can't build omap_device for omap-dmic.\n");
}
#else
static inline void omap_init_dmic(void) {}
#endif

#if defined(CONFIG_SND_OMAP_SOC_OMAP_HDMI) || \
		defined(CONFIG_SND_OMAP_SOC_OMAP_HDMI_MODULE)

static struct platform_device omap_hdmi_audio = {
	.name	= "omap-hdmi-audio",
	.id	= -1,
};

static void __init omap_init_hdmi_audio(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("dss_hdmi");
	if (!oh) {
		printk(KERN_ERR "Could not look up dss_hdmi hw_mod\n");
		return;
	}

	pdev = omap_device_build("omap-hdmi-audio-dai", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev),
	     "Can't build omap_device for omap-hdmi-audio-dai.\n");

	platform_device_register(&omap_hdmi_audio);
}
#else
static inline void omap_init_hdmi_audio(void) {}
#endif

#if defined(CONFIG_SPI_OMAP24XX) || defined(CONFIG_SPI_OMAP24XX_MODULE)

#include <linux/platform_data/spi-omap2-mcspi.h>

static int __init omap_mcspi_init(struct omap_hwmod *oh, void *unused)
{
	struct platform_device *pdev;
	char *name = "omap2_mcspi";
	struct omap2_mcspi_platform_config *pdata;
	static int spi_num;
	struct omap2_mcspi_dev_attr *mcspi_attrib = oh->dev_attr;

	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		pr_err("Memory allocation for McSPI device failed\n");
		return -ENOMEM;
	}

	pdata->num_cs = mcspi_attrib->num_chipselect;
	switch (oh->class->rev) {
	case OMAP2_MCSPI_REV:
	case OMAP3_MCSPI_REV:
			pdata->regs_offset = 0;
			break;
	case OMAP4_MCSPI_REV:
			pdata->regs_offset = OMAP4_MCSPI_REG_OFFSET;
			break;
	default:
			pr_err("Invalid McSPI Revision value\n");
			kfree(pdata);
			return -EINVAL;
	}

	spi_num++;
	pdev = omap_device_build(name, spi_num, oh, pdata, sizeof(*pdata));
	WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s\n",
				name, oh->name);
	kfree(pdata);
	return 0;
}

static void omap_init_mcspi(void)
{
	omap_hwmod_for_each_by_class("mcspi", omap_mcspi_init, NULL);
}

#else
static inline void omap_init_mcspi(void) {}
#endif

/**
 * omap_init_rng - bind the RNG hwmod to the RNG omap_device
 *
 * Bind the RNG hwmod to the RNG omap_device.  No return value.
 */
static void omap_init_rng(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("rng");
	if (!oh)
		return;

	pdev = omap_device_build("omap_rng", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "Can't build omap_device for omap_rng\n");
}

static void __init omap_init_sham(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("sham");
	if (!oh)
		return;

	pdev = omap_device_build("omap-sham", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "Can't build omap_device for omap-sham\n");
}

static void __init omap_init_aes(void)
{
	struct omap_hwmod *oh;
	struct platform_device *pdev;

	oh = omap_hwmod_lookup("aes");
	if (!oh)
		return;

	pdev = omap_device_build("omap-aes", -1, oh, NULL, 0);
	WARN(IS_ERR(pdev), "Can't build omap_device for omap-aes\n");
}

/*-------------------------------------------------------------------------*/

#if defined(CONFIG_VIDEO_OMAP2_VOUT) || \
	defined(CONFIG_VIDEO_OMAP2_VOUT_MODULE)
#if defined(CONFIG_FB_OMAP2) || defined(CONFIG_FB_OMAP2_MODULE)
static struct resource omap_vout_resource[3 - CONFIG_FB_OMAP2_NUM_FBS] = {
};
#else
static struct resource omap_vout_resource[2] = {
};
#endif

static struct platform_device omap_vout_device = {
	.name		= "omap_vout",
	.num_resources	= ARRAY_SIZE(omap_vout_resource),
	.resource 	= &omap_vout_resource[0],
	.id		= -1,
};
static void omap_init_vout(void)
{
	if (platform_device_register(&omap_vout_device) < 0)
		printk(KERN_ERR "Unable to register OMAP-VOUT device\n");
}
#else
static inline void omap_init_vout(void) {}
#endif

#if defined(CONFIG_OMAP_OCP2SCP) || defined(CONFIG_OMAP_OCP2SCP_MODULE)
static int count_ocp2scp_devices(struct omap_ocp2scp_dev *ocp2scp_dev)
{
	int cnt	= 0;

	while (ocp2scp_dev->drv_name != NULL) {
		cnt++;
		ocp2scp_dev++;
	}

	return cnt;
}

static void __init omap_init_ocp2scp(void)
{
	struct omap_hwmod	*oh;
	struct platform_device	*pdev;
	int			bus_id = -1, dev_cnt = 0, i;
	struct omap_ocp2scp_dev	*ocp2scp_dev;
	const char		*oh_name, *name;
	struct omap_ocp2scp_platform_data *pdata;

	if (!cpu_is_omap44xx())
		return;

	oh_name = "ocp2scp_usb_phy";
	name	= "omap-ocp2scp";

	oh = omap_hwmod_lookup(oh_name);
	if (!oh) {
		pr_err("%s: could not find omap_hwmod for %s\n", __func__,
								oh_name);
		return;
	}

	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
	if (!pdata) {
		pr_err("%s: No memory for ocp2scp pdata\n", __func__);
		return;
	}

	ocp2scp_dev = oh->dev_attr;
	dev_cnt = count_ocp2scp_devices(ocp2scp_dev);

	if (!dev_cnt) {
		pr_err("%s: No devices connected to ocp2scp\n", __func__);
		kfree(pdata);
		return;
	}

	pdata->devices = kzalloc(sizeof(struct omap_ocp2scp_dev *)
					* dev_cnt, GFP_KERNEL);
	if (!pdata->devices) {
		pr_err("%s: No memory for ocp2scp pdata devices\n", __func__);
		kfree(pdata);
		return;
	}

	for (i = 0; i < dev_cnt; i++, ocp2scp_dev++)
		pdata->devices[i] = ocp2scp_dev;

	pdata->dev_cnt	= dev_cnt;

	pdev = omap_device_build(name, bus_id, oh, pdata, sizeof(*pdata));
	if (IS_ERR(pdev)) {
		pr_err("Could not build omap_device for %s %s\n",
						name, oh_name);
		kfree(pdata->devices);
		kfree(pdata);
		return;
	}
}
#else
static inline void omap_init_ocp2scp(void) { }
#endif

/*-------------------------------------------------------------------------*/

static int __init omap2_init_devices(void)
{
	/* Enable dummy states for those platforms without pinctrl support */
	if (!of_have_populated_dt())
		pinctrl_provide_dummies();

	/*
	 * please keep these calls, and their implementations above,
	 * in alphabetical order so they're easier to sort through.
	 */
	omap_init_audio();
	omap_init_camera();
	omap_init_hdmi_audio();
	omap_init_mbox();
	/* If dtb is there, the devices will be created dynamically */
	if (!of_have_populated_dt()) {
		omap_init_control_usb();
		omap_init_dmic();
		omap_init_mcpdm();
		omap_init_mcspi();
		omap_init_sham();
		omap_init_aes();
	}
	omap_init_sti();
	omap_init_rng();
	omap_init_vout();
	omap_init_ocp2scp();

	return 0;
}
omap_arch_initcall(omap2_init_devices);