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>

diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c
index 3363e50..2f42937 100644 (file)
--- a/drivers/media/video/cafe_ccic.c
+++ b/drivers/media/video/cafe_ccic.c
@@ -33,7 +33,6 @@
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/delay.h>
-#include <linux/debugfs.h>
 #include <linux/jiffies.h>
 #include <linux/vmalloc.h>
 
@@ -182,10 +181,6 @@ struct cafe_camera
        /* Misc */
        wait_queue_head_t smbus_wait;   /* Waiting on i2c events */
        wait_queue_head_t iowait;       /* Waiting on frame data */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-       struct dentry *dfs_regs;
-       struct dentry *dfs_cam_regs;
-#endif
 };
 
 /*
@@ -1646,6 +1641,47 @@ static int cafe_vidioc_s_parm(struct file *filp, void *priv,
        return ret;
 }
 
+static int cafe_vidioc_g_chip_ident(struct file *file, void *priv,
+               struct v4l2_dbg_chip_ident *chip)
+{
+       struct cafe_camera *cam = priv;
+
+       chip->ident = V4L2_IDENT_NONE;
+       chip->revision = 0;
+       if (v4l2_chip_match_host(&chip->match)) {
+               chip->ident = V4L2_IDENT_CAFE;
+               return 0;
+       }
+       return sensor_call(cam, core, g_chip_ident, chip);
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int cafe_vidioc_g_register(struct file *file, void *priv,
+               struct v4l2_dbg_register *reg)
+{
+       struct cafe_camera *cam = priv;
+
+       if (v4l2_chip_match_host(&reg->match)) {
+               reg->val = cafe_reg_read(cam, reg->reg);
+               reg->size = 4;
+               return 0;
+       }
+       return sensor_call(cam, core, g_register, reg);
+}
+
+static int cafe_vidioc_s_register(struct file *file, void *priv,
+               struct v4l2_dbg_register *reg)
+{
+       struct cafe_camera *cam = priv;
+
+       if (v4l2_chip_match_host(&reg->match)) {
+               cafe_reg_write(cam, reg->reg, reg->val);
+               return 0;
+       }
+       return sensor_call(cam, core, s_register, reg);
+}
+#endif
+
 /*
  * This template device holds all of those v4l2 methods; we
  * clone it for specific real devices.
@@ -1682,6 +1718,11 @@ static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = {
        .vidioc_s_ctrl          = cafe_vidioc_s_ctrl,
        .vidioc_g_parm          = cafe_vidioc_g_parm,
        .vidioc_s_parm          = cafe_vidioc_s_parm,
+       .vidioc_g_chip_ident    = cafe_vidioc_g_chip_ident,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .vidioc_g_register      = cafe_vidioc_g_register,
+       .vidioc_s_register      = cafe_vidioc_s_register,
+#endif
 };
 
 static struct video_device cafe_v4l_template = {
@@ -1849,127 +1890,6 @@ static irqreturn_t cafe_irq(int irq, void *data)
 
 
 /* -------------------------------------------------------------------------- */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
-/*
- * Debugfs stuff.
- */
-
-static char cafe_debug_buf[1024];
-static struct dentry *cafe_dfs_root;
-
-static void cafe_dfs_setup(void)
-{
-       cafe_dfs_root = debugfs_create_dir("cafe_ccic", NULL);
-       if (IS_ERR(cafe_dfs_root)) {
-               cafe_dfs_root = NULL;  /* Never mind */
-               printk(KERN_NOTICE "cafe_ccic unable to set up debugfs\n");
-       }
-}
-
-static void cafe_dfs_shutdown(void)
-{
-       if (cafe_dfs_root)
-               debugfs_remove(cafe_dfs_root);
-}
-
-static int cafe_dfs_open(struct inode *inode, struct file *file)
-{
-       file->private_data = inode->i_private;
-       return 0;
-}
-
-static ssize_t cafe_dfs_read_regs(struct file *file,
-               char __user *buf, size_t count, loff_t *ppos)
-{
-       struct cafe_camera *cam = file->private_data;
-       char *s = cafe_debug_buf;
-       int offset;
-
-       for (offset = 0; offset < 0x44; offset += 4)
-               s += sprintf(s, "%02x: %08x\n", offset,
-                               cafe_reg_read(cam, offset));
-       for (offset = 0x88; offset <= 0x90; offset += 4)
-               s += sprintf(s, "%02x: %08x\n", offset,
-                               cafe_reg_read(cam, offset));
-       for (offset = 0xb4; offset <= 0xbc; offset += 4)
-               s += sprintf(s, "%02x: %08x\n", offset,
-                               cafe_reg_read(cam, offset));
-       for (offset = 0x3000; offset <= 0x300c; offset += 4)
-               s += sprintf(s, "%04x: %08x\n", offset,
-                               cafe_reg_read(cam, offset));
-       return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
-                       s - cafe_debug_buf);
-}
-
-static const struct file_operations cafe_dfs_reg_ops = {
-       .owner = THIS_MODULE,
-       .read = cafe_dfs_read_regs,
-       .open = cafe_dfs_open
-};
-
-static ssize_t cafe_dfs_read_cam(struct file *file,
-               char __user *buf, size_t count, loff_t *ppos)
-{
-       struct cafe_camera *cam = file->private_data;
-       char *s = cafe_debug_buf;
-       int offset;
-
-       if (! cam->sensor)
-               return -EINVAL;
-       for (offset = 0x0; offset < 0x8a; offset++)
-       {
-               u8 v;
-
-               cafe_smbus_read_data(cam, cam->sensor_addr, offset, &v);
-               s += sprintf(s, "%02x: %02x\n", offset, v);
-       }
-       return simple_read_from_buffer(buf, count, ppos, cafe_debug_buf,
-                       s - cafe_debug_buf);
-}
-
-static const struct file_operations cafe_dfs_cam_ops = {
-       .owner = THIS_MODULE,
-       .read = cafe_dfs_read_cam,
-       .open = cafe_dfs_open
-};
-
-
-
-static void cafe_dfs_cam_setup(struct cafe_camera *cam)
-{
-       char fname[40];
-
-       if (!cafe_dfs_root)
-               return;
-       sprintf(fname, "regs-%d", cam->vdev.num);
-       cam->dfs_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
-                       cam, &cafe_dfs_reg_ops);
-       sprintf(fname, "cam-%d", cam->vdev.num);
-       cam->dfs_cam_regs = debugfs_create_file(fname, 0444, cafe_dfs_root,
-                       cam, &cafe_dfs_cam_ops);
-}
-
-
-static void cafe_dfs_cam_shutdown(struct cafe_camera *cam)
-{
-       if (! IS_ERR(cam->dfs_regs))
-               debugfs_remove(cam->dfs_regs);
-       if (! IS_ERR(cam->dfs_cam_regs))
-               debugfs_remove(cam->dfs_cam_regs);
-}
-
-#else
-
-#define cafe_dfs_setup()
-#define cafe_dfs_shutdown()
-#define cafe_dfs_cam_setup(cam)
-#define cafe_dfs_cam_shutdown(cam)
-#endif    /* CONFIG_VIDEO_ADV_DEBUG */
-
-
-
-
-/* ------------------------------------------------------------------------*/
 /*
  * PCI interface stuff.
  */
@@ -2070,7 +1990,6 @@ static int cafe_pci_probe(struct pci_dev *pdev,
                                        " will try again later.");
        }
 
-       cafe_dfs_cam_setup(cam);
        mutex_unlock(&cam->s_mutex);
        return 0;
 
@@ -2096,7 +2015,6 @@ out:
 static void cafe_shutdown(struct cafe_camera *cam)
 {
 /* FIXME: Make sure we take care of everything here */
-       cafe_dfs_cam_shutdown(cam);
        if (cam->n_sbufs > 0)
                /* What if they are still mapped?  Shouldn't be, but... */
                cafe_free_sio_buffers(cam);
@@ -2216,7 +2134,6 @@ static int __init cafe_init(void)
 
        printk(KERN_NOTICE "Marvell M88ALP01 'CAFE' Camera Controller version %d\n",
                        CAFE_VERSION);
-       cafe_dfs_setup();
        ret = pci_register_driver(&cafe_pci_driver);
        if (ret) {
                printk(KERN_ERR "Unable to register cafe_ccic driver\n");
@@ -2232,7 +2149,6 @@ static int __init cafe_init(void)
 static void __exit cafe_exit(void)
 {
        pci_unregister_driver(&cafe_pci_driver);
-       cafe_dfs_shutdown();
 }
 
 module_init(cafe_init);

diff --git a/include/media/v4l2-chip-ident.h b/include/media/v4l2-chip-ident.h
index ca2aa6d..1be461a 100644 (file)
--- a/include/media/v4l2-chip-ident.h
+++ b/include/media/v4l2-chip-ident.h
@@ -146,21 +146,12 @@ enum {
        /* module tda9840: just ident 9840 */
        V4L2_IDENT_TDA9840 = 9840,
 
+       /* module cafe_ccic, just ident 8801 */
+       V4L2_IDENT_CAFE = 8801,
+
        /* module tw9910: just ident 9910 */
        V4L2_IDENT_TW9910 = 9910,
 
-       /* module cs53132a: just ident 53132 */
-       V4L2_IDENT_CS53l32A = 53132,
-
-       /* module upd64031a: just ident 64031 */
-       V4L2_IDENT_UPD64031A = 64031,
-
-       /* module upd64083: just ident 64083 */
-       V4L2_IDENT_UPD64083 = 64083,
-
-       /* module m52790: just ident 52790 */
-       V4L2_IDENT_M52790 = 52790,
-
        /* module msp3400: reserved range 34000-34999 and 44000-44999 */
        V4L2_IDENT_MSPX4XX  = 34000, /* generic MSPX4XX identifier, only
                                        use internally (tveeprom.c). */
@@ -237,6 +228,18 @@ enum {
        V4L2_IDENT_MT9V022IX7ATC        = 45010, /* No way to detect "normal" I77ATx */
        V4L2_IDENT_MT9V022IX7ATM        = 45015, /* and "lead free" IA7ATx chips */
        V4L2_IDENT_MT9T031              = 45020,
+
+       /* module cs53132a: just ident 53132 */
+       V4L2_IDENT_CS53l32A = 53132,
+
+       /* module upd64031a: just ident 64031 */
+       V4L2_IDENT_UPD64031A = 64031,
+
+       /* module upd64083: just ident 64083 */
+       V4L2_IDENT_UPD64083 = 64083,
+
+       /* module m52790: just ident 52790 */
+       V4L2_IDENT_M52790 = 52790,
 };
 
 #endif