diff options
Diffstat (limited to 'drivers/media/platform/marvell-ccic/cafe-driver.c')
| -rw-r--r-- | drivers/media/platform/marvell-ccic/cafe-driver.c | 62 |
1 files changed, 46 insertions, 16 deletions
diff --git a/drivers/media/platform/marvell-ccic/cafe-driver.c b/drivers/media/platform/marvell-ccic/cafe-driver.c index 8d00d9d8adff..37fdcc53a1c4 100644 --- a/drivers/media/platform/marvell-ccic/cafe-driver.c +++ b/drivers/media/platform/marvell-ccic/cafe-driver.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * A driver for the CMOS camera controller in the Marvell 88ALP01 "cafe" * multifunction chip. Currently works with the Omnivision OV7670 @@ -8,14 +9,12 @@ * * Copyright 2006-11 One Laptop Per Child Association, Inc. * Copyright 2006-11 Jonathan Corbet <corbet@lwn.net> + * Copyright 2018 Lubomir Rintel <lkundrak@v3.sk> * * Written by Jonathan Corbet, corbet@lwn.net. * * v4l2_device/v4l2_subdev conversion by: * Copyright (C) 2009 Hans Verkuil <hverkuil@xs4all.nl> - * - * This file may be distributed under the terms of the GNU General - * Public License, version 2. */ #include <linux/kernel.h> #include <linux/module.h> @@ -27,10 +26,12 @@ #include <linux/slab.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> +#include <media/i2c/ov7670.h> #include <linux/device.h> #include <linux/wait.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/clkdev.h> #include "mcam-core.h" @@ -52,6 +53,7 @@ struct cafe_camera { int registered; /* Fully initialized? */ struct mcam_camera mcam; struct pci_dev *pdev; + struct i2c_adapter *i2c_adapter; wait_queue_head_t smbus_wait; /* Waiting on i2c events */ }; @@ -351,15 +353,15 @@ static int cafe_smbus_setup(struct cafe_camera *cam) return ret; } - cam->mcam.i2c_adapter = adap; + cam->i2c_adapter = adap; cafe_smbus_enable_irq(cam); return 0; } static void cafe_smbus_shutdown(struct cafe_camera *cam) { - i2c_del_adapter(cam->mcam.i2c_adapter); - kfree(cam->mcam.i2c_adapter); + i2c_del_adapter(cam->i2c_adapter); + kfree(cam->i2c_adapter); } @@ -452,6 +454,29 @@ static irqreturn_t cafe_irq(int irq, void *data) return IRQ_RETVAL(handled); } +/* -------------------------------------------------------------------------- */ + +static struct ov7670_config sensor_cfg = { + /* + * Exclude QCIF mode, because it only captures a tiny portion + * of the sensor FOV + */ + .min_width = 320, + .min_height = 240, + + /* + * Set the clock speed for the XO 1; I don't believe this + * driver has ever run anywhere else. + */ + .clock_speed = 45, + .use_smbus = 1, +}; + +static struct i2c_board_info ov7670_info = { + .type = "ov7670", + .addr = 0x42 >> 1, + .platform_data = &sensor_cfg, +}; /* -------------------------------------------------------------------------- */ /* @@ -482,12 +507,6 @@ static int cafe_pci_probe(struct pci_dev *pdev, mcam->dev = &pdev->dev; snprintf(mcam->bus_info, sizeof(mcam->bus_info), "PCI:%s", pci_name(pdev)); /* - * Set the clock speed for the XO 1; I don't believe this - * driver has ever run anywhere else. - */ - mcam->clock_speed = 45; - mcam->use_smbus = 1; - /* * Vmalloc mode for buffers is traditional with this driver. * We *might* be able to run DMA_contig, especially on a system * with CMA in it. @@ -513,11 +532,10 @@ static int cafe_pci_probe(struct pci_dev *pdev, goto out_iounmap; /* - * Initialize the controller and leave it powered up. It will - * stay that way until the sensor driver shows up. + * Initialize the controller. */ cafe_ctlr_init(mcam); - cafe_ctlr_power_up(mcam); + /* * Set up I2C/SMBUS communications. We have to drop the mutex here * because the sensor could attach in this call chain, leading to @@ -527,12 +545,24 @@ static int cafe_pci_probe(struct pci_dev *pdev, if (ret) goto out_pdown; + mcam->asd.match_type = V4L2_ASYNC_MATCH_I2C; + mcam->asd.match.i2c.adapter_id = i2c_adapter_id(cam->i2c_adapter); + mcam->asd.match.i2c.address = ov7670_info.addr; + ret = mccic_register(mcam); - if (ret == 0) { + if (ret) + goto out_smbus_shutdown; + + clkdev_create(mcam->mclk, "xclk", "%d-%04x", + i2c_adapter_id(cam->i2c_adapter), ov7670_info.addr); + + if (i2c_new_device(cam->i2c_adapter, &ov7670_info)) { cam->registered = 1; return 0; } + mccic_shutdown(mcam); +out_smbus_shutdown: cafe_smbus_shutdown(cam); out_pdown: cafe_ctlr_power_down(mcam); |