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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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V4L/DVB (11118): cafe_ccic: replace debugfs with g/s_register ioctls.
Using VIDIOC_DBG_S/G_REGISTER is the standard way of reading/writing register for advanced debugging under v4l2. In addition, using this means that the cafe_ccic driver doesn't need to have knowledge about the used sensor: the debug ioctl can be passed on to the sensor if it isn't for the host. Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Acked-by: Jonathan Corbet <corbet@lwn.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
parent
b794aabff0
commit
69d94f7ec5
@ -33,7 +33,6 @@
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#include <linux/list.h>
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#include <linux/dma-mapping.h>
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#include <linux/delay.h>
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#include <linux/debugfs.h>
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#include <linux/jiffies.h>
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#include <linux/vmalloc.h>
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@ -182,10 +181,6 @@ struct cafe_camera
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/* Misc */
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wait_queue_head_t smbus_wait; /* Waiting on i2c events */
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wait_queue_head_t iowait; /* Waiting on frame data */
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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struct dentry *dfs_regs;
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struct dentry *dfs_cam_regs;
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#endif
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};
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/*
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@ -1646,6 +1641,47 @@ static int cafe_vidioc_s_parm(struct file *filp, void *priv,
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return ret;
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}
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static int cafe_vidioc_g_chip_ident(struct file *file, void *priv,
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struct v4l2_dbg_chip_ident *chip)
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{
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struct cafe_camera *cam = priv;
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chip->ident = V4L2_IDENT_NONE;
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chip->revision = 0;
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if (v4l2_chip_match_host(&chip->match)) {
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chip->ident = V4L2_IDENT_CAFE;
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return 0;
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}
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return sensor_call(cam, core, g_chip_ident, chip);
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}
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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static int cafe_vidioc_g_register(struct file *file, void *priv,
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struct v4l2_dbg_register *reg)
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{
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struct cafe_camera *cam = priv;
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if (v4l2_chip_match_host(®->match)) {
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reg->val = cafe_reg_read(cam, reg->reg);
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reg->size = 4;
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return 0;
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}
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return sensor_call(cam, core, g_register, reg);
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}
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static int cafe_vidioc_s_register(struct file *file, void *priv,
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struct v4l2_dbg_register *reg)
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{
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struct cafe_camera *cam = priv;
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if (v4l2_chip_match_host(®->match)) {
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cafe_reg_write(cam, reg->reg, reg->val);
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return 0;
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}
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return sensor_call(cam, core, s_register, reg);
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}
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#endif
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/*
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* This template device holds all of those v4l2 methods; we
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* clone it for specific real devices.
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@ -1682,6 +1718,11 @@ static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = {
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.vidioc_s_ctrl = cafe_vidioc_s_ctrl,
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.vidioc_g_parm = cafe_vidioc_g_parm,
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.vidioc_s_parm = cafe_vidioc_s_parm,
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.vidioc_g_chip_ident = cafe_vidioc_g_chip_ident,
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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.vidioc_g_register = cafe_vidioc_g_register,
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.vidioc_s_register = cafe_vidioc_s_register,
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#endif
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};
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static struct video_device cafe_v4l_template = {
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@ -1849,127 +1890,6 @@ static irqreturn_t cafe_irq(int irq, void *data)
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/* -------------------------------------------------------------------------- */
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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/*
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* Debugfs stuff.
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*/
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static char cafe_debug_buf[1024];
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static struct dentry *cafe_dfs_root;
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static void cafe_dfs_setup(void)
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{
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cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL);
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if (IS_ERR(cafe_dfs_root)) {
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cafe_dfs_root = NULL; /* Never mind */
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printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n");
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}
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}
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static void cafe_dfs_shutdown(void)
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{
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if (cafe_dfs_root)
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debugfs_remove(cafe_dfs_root);
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}
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static int cafe_dfs_open(struct inode *inode, struct file *file)
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{
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file->private_data = inode->i_private;
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return 0;
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}
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static ssize_t cafe_dfs_read_regs(struct file *file,
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char __user *buf, size_t count, loff_t *ppos)
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{
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struct cafe_camera *cam = file->private_data;
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char *s = cafe_debug_buf;
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int offset;
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for (offset = 0; offset < 0x44; offset += 4)
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s += sprintf(s, "%02x: %08x\n", offset,
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cafe_reg_read(cam, offset));
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for (offset = 0x88; offset <= 0x90; offset += 4)
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s += sprintf(s, "%02x: %08x\n", offset,
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cafe_reg_read(cam, offset));
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for (offset = 0xb4; offset <= 0xbc; offset += 4)
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s += sprintf(s, "%02x: %08x\n", offset,
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cafe_reg_read(cam, offset));
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for (offset = 0x3000; offset <= 0x300c; offset += 4)
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s += sprintf(s, "%04x: %08x\n", offset,
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cafe_reg_read(cam, offset));
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return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
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s - cafe_debug_buf);
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}
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static const struct file_operations cafe_dfs_reg_ops = {
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.owner = THIS_MODULE,
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.read = cafe_dfs_read_regs,
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.open = cafe_dfs_open
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};
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static ssize_t cafe_dfs_read_cam(struct file *file,
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char __user *buf, size_t count, loff_t *ppos)
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{
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struct cafe_camera *cam = file->private_data;
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char *s = cafe_debug_buf;
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int offset;
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if (! cam->sensor)
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return -EINVAL;
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for (offset = 0x0; offset < 0x8a; offset++)
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{
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u8 v;
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cafe_smbus_read_data(cam, cam->sensor_addr, offset, &v);
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s += sprintf(s, "%02x: %02x\n", offset, v);
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}
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return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
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s - cafe_debug_buf);
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}
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static const struct file_operations cafe_dfs_cam_ops = {
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.owner = THIS_MODULE,
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.read = cafe_dfs_read_cam,
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.open = cafe_dfs_open
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};
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static void cafe_dfs_cam_setup(struct cafe_camera *cam)
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{
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char fname[40];
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if (!cafe_dfs_root)
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return;
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sprintf(fname, "regs-%d", cam->vdev.num);
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cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
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cam, &cafe_dfs_reg_ops);
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sprintf(fname, "cam-%d", cam->vdev.num);
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cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
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cam, &cafe_dfs_cam_ops);
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}
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static void cafe_dfs_cam_shutdown(struct cafe_camera *cam)
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{
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if (! IS_ERR(cam->dfs_regs))
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debugfs_remove(cam->dfs_regs);
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if (! IS_ERR(cam->dfs_cam_regs))
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debugfs_remove(cam->dfs_cam_regs);
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}
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#else
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#define cafe_dfs_setup()
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#define cafe_dfs_shutdown()
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#define cafe_dfs_cam_setup(cam)
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#define cafe_dfs_cam_shutdown(cam)
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#endif /* CONFIG_VIDEO_ADV_DEBUG */
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/* ------------------------------------------------------------------------*/
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/*
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* PCI interface stuff.
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*/
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@ -2070,7 +1990,6 @@ static int cafe_pci_probe(struct pci_dev *pdev,
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" will try again later.");
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}
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cafe_dfs_cam_setup(cam);
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mutex_unlock(&cam->s_mutex);
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return 0;
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@ -2096,7 +2015,6 @@ static int cafe_pci_probe(struct pci_dev *pdev,
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static void cafe_shutdown(struct cafe_camera *cam)
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{
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/* FIXME: Make sure we take care of everything here */
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cafe_dfs_cam_shutdown(cam);
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if (cam->n_sbufs > 0)
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/* What if they are still mapped? Shouldn't be, but... */
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cafe_free_sio_buffers(cam);
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@ -2216,7 +2134,6 @@ static int __init cafe_init(void)
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printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
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CAFE_VERSION);
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cafe_dfs_setup();
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ret = pci_register_driver(&cafe_pci_driver);
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if (ret) {
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printk(KERN_ERR "Unable to register cafe_ccic driver\n");
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@ -2232,7 +2149,6 @@ static int __init cafe_init(void)
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static void __exit cafe_exit(void)
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{
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pci_unregister_driver(&cafe_pci_driver);
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cafe_dfs_shutdown();
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}
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module_init(cafe_init);
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@ -146,21 +146,12 @@ enum {
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/* module tda9840: just ident 9840 */
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V4L2_IDENT_TDA9840 = 9840,
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/* module cafe_ccic, just ident 8801 */
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V4L2_IDENT_CAFE = 8801,
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/* module tw9910: just ident 9910 */
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V4L2_IDENT_TW9910 = 9910,
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/* module cs53132a: just ident 53132 */
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V4L2_IDENT_CS53l32A = 53132,
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/* module upd64031a: just ident 64031 */
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V4L2_IDENT_UPD64031A = 64031,
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/* module upd64083: just ident 64083 */
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V4L2_IDENT_UPD64083 = 64083,
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/* module m52790: just ident 52790 */
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V4L2_IDENT_M52790 = 52790,
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/* module msp3400: reserved range 34000-34999 and 44000-44999 */
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V4L2_IDENT_MSPX4XX = 34000, /* generic MSPX4XX identifier, only
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use internally (tveeprom.c). */
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@ -237,6 +228,18 @@ enum {
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V4L2_IDENT_MT9V022IX7ATC = 45010, /* No way to detect "normal" I77ATx */
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V4L2_IDENT_MT9V022IX7ATM = 45015, /* and "lead free" IA7ATx chips */
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V4L2_IDENT_MT9T031 = 45020,
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/* module cs53132a: just ident 53132 */
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V4L2_IDENT_CS53l32A = 53132,
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/* module upd64031a: just ident 64031 */
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V4L2_IDENT_UPD64031A = 64031,
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/* module upd64083: just ident 64083 */
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V4L2_IDENT_UPD64083 = 64083,
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/* module m52790: just ident 52790 */
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V4L2_IDENT_M52790 = 52790,
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};
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#endif
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