Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1 | /* |
| 2 | * The Marvell camera core. This device appears in a number of settings, |
| 3 | * so it needs platform-specific support outside of the core. |
| 4 | * |
| 5 | * Copyright 2011 Jonathan Corbet corbet@lwn.net |
| 6 | */ |
| 7 | #include <linux/kernel.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/fs.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 10 | #include <linux/mm.h> |
| 11 | #include <linux/i2c.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/spinlock.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 14 | #include <linux/slab.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 15 | #include <linux/device.h> |
| 16 | #include <linux/wait.h> |
| 17 | #include <linux/list.h> |
| 18 | #include <linux/dma-mapping.h> |
| 19 | #include <linux/delay.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 20 | #include <linux/vmalloc.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 21 | #include <linux/io.h> |
Jonathan Corbet | 362d45b | 2011-06-20 16:14:37 -0300 | [diff] [blame] | 22 | #include <linux/videodev2.h> |
| 23 | #include <media/v4l2-device.h> |
| 24 | #include <media/v4l2-ioctl.h> |
| 25 | #include <media/v4l2-chip-ident.h> |
| 26 | #include <media/ov7670.h> |
| 27 | #include <media/videobuf2-vmalloc.h> |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 28 | #include <media/videobuf2-dma-contig.h> |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 29 | #include <media/videobuf2-dma-sg.h> |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 30 | |
| 31 | #include "mcam-core.h" |
| 32 | |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 33 | /* |
| 34 | * Basic frame stats - to be deleted shortly |
| 35 | */ |
| 36 | static int frames; |
| 37 | static int singles; |
| 38 | static int delivered; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 39 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 40 | #ifdef MCAM_MODE_VMALLOC |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 41 | /* |
| 42 | * Internal DMA buffer management. Since the controller cannot do S/G I/O, |
| 43 | * we must have physically contiguous buffers to bring frames into. |
| 44 | * These parameters control how many buffers we use, whether we |
| 45 | * allocate them at load time (better chance of success, but nails down |
| 46 | * memory) or when somebody tries to use the camera (riskier), and, |
| 47 | * for load-time allocation, how big they should be. |
| 48 | * |
| 49 | * The controller can cycle through three buffers. We could use |
| 50 | * more by flipping pointers around, but it probably makes little |
| 51 | * sense. |
| 52 | */ |
| 53 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 54 | static bool alloc_bufs_at_read; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 55 | module_param(alloc_bufs_at_read, bool, 0444); |
| 56 | MODULE_PARM_DESC(alloc_bufs_at_read, |
| 57 | "Non-zero value causes DMA buffers to be allocated when the " |
| 58 | "video capture device is read, rather than at module load " |
| 59 | "time. This saves memory, but decreases the chances of " |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 60 | "successfully getting those buffers. This parameter is " |
| 61 | "only used in the vmalloc buffer mode"); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 62 | |
| 63 | static int n_dma_bufs = 3; |
| 64 | module_param(n_dma_bufs, uint, 0644); |
| 65 | MODULE_PARM_DESC(n_dma_bufs, |
| 66 | "The number of DMA buffers to allocate. Can be either two " |
| 67 | "(saves memory, makes timing tighter) or three."); |
| 68 | |
| 69 | static int dma_buf_size = VGA_WIDTH * VGA_HEIGHT * 2; /* Worst case */ |
| 70 | module_param(dma_buf_size, uint, 0444); |
| 71 | MODULE_PARM_DESC(dma_buf_size, |
| 72 | "The size of the allocated DMA buffers. If actual operating " |
| 73 | "parameters require larger buffers, an attempt to reallocate " |
| 74 | "will be made."); |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 75 | #else /* MCAM_MODE_VMALLOC */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 76 | static const bool alloc_bufs_at_read = 0; |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 77 | static const int n_dma_bufs = 3; /* Used by S/G_PARM */ |
| 78 | #endif /* MCAM_MODE_VMALLOC */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 79 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 80 | static bool flip; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 81 | module_param(flip, bool, 0444); |
| 82 | MODULE_PARM_DESC(flip, |
| 83 | "If set, the sensor will be instructed to flip the image " |
| 84 | "vertically."); |
| 85 | |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 86 | static int buffer_mode = -1; |
| 87 | module_param(buffer_mode, int, 0444); |
| 88 | MODULE_PARM_DESC(buffer_mode, |
| 89 | "Set the buffer mode to be used; default is to go with what " |
| 90 | "the platform driver asks for. Set to 0 for vmalloc, 1 for " |
| 91 | "DMA contiguous."); |
| 92 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 93 | /* |
| 94 | * Status flags. Always manipulated with bit operations. |
| 95 | */ |
| 96 | #define CF_BUF0_VALID 0 /* Buffers valid - first three */ |
| 97 | #define CF_BUF1_VALID 1 |
| 98 | #define CF_BUF2_VALID 2 |
| 99 | #define CF_DMA_ACTIVE 3 /* A frame is incoming */ |
| 100 | #define CF_CONFIG_NEEDED 4 /* Must configure hardware */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 101 | #define CF_SINGLE_BUFFER 5 /* Running with a single buffer */ |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 102 | #define CF_SG_RESTART 6 /* SG restart needed */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 103 | |
| 104 | #define sensor_call(cam, o, f, args...) \ |
| 105 | v4l2_subdev_call(cam->sensor, o, f, ##args) |
| 106 | |
| 107 | static struct mcam_format_struct { |
| 108 | __u8 *desc; |
| 109 | __u32 pixelformat; |
| 110 | int bpp; /* Bytes per pixel */ |
| 111 | enum v4l2_mbus_pixelcode mbus_code; |
| 112 | } mcam_formats[] = { |
| 113 | { |
| 114 | .desc = "YUYV 4:2:2", |
| 115 | .pixelformat = V4L2_PIX_FMT_YUYV, |
| 116 | .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8, |
| 117 | .bpp = 2, |
| 118 | }, |
| 119 | { |
| 120 | .desc = "RGB 444", |
| 121 | .pixelformat = V4L2_PIX_FMT_RGB444, |
| 122 | .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, |
| 123 | .bpp = 2, |
| 124 | }, |
| 125 | { |
| 126 | .desc = "RGB 565", |
| 127 | .pixelformat = V4L2_PIX_FMT_RGB565, |
| 128 | .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE, |
| 129 | .bpp = 2, |
| 130 | }, |
| 131 | { |
| 132 | .desc = "Raw RGB Bayer", |
| 133 | .pixelformat = V4L2_PIX_FMT_SBGGR8, |
| 134 | .mbus_code = V4L2_MBUS_FMT_SBGGR8_1X8, |
| 135 | .bpp = 1 |
| 136 | }, |
| 137 | }; |
| 138 | #define N_MCAM_FMTS ARRAY_SIZE(mcam_formats) |
| 139 | |
| 140 | static struct mcam_format_struct *mcam_find_format(u32 pixelformat) |
| 141 | { |
| 142 | unsigned i; |
| 143 | |
| 144 | for (i = 0; i < N_MCAM_FMTS; i++) |
| 145 | if (mcam_formats[i].pixelformat == pixelformat) |
| 146 | return mcam_formats + i; |
| 147 | /* Not found? Then return the first format. */ |
| 148 | return mcam_formats; |
| 149 | } |
| 150 | |
| 151 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 152 | * The default format we use until somebody says otherwise. |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 153 | */ |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 154 | static const struct v4l2_pix_format mcam_def_pix_format = { |
| 155 | .width = VGA_WIDTH, |
| 156 | .height = VGA_HEIGHT, |
| 157 | .pixelformat = V4L2_PIX_FMT_YUYV, |
| 158 | .field = V4L2_FIELD_NONE, |
| 159 | .bytesperline = VGA_WIDTH*2, |
| 160 | .sizeimage = VGA_WIDTH*VGA_HEIGHT*2, |
| 161 | }; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 162 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 163 | static const enum v4l2_mbus_pixelcode mcam_def_mbus_code = |
| 164 | V4L2_MBUS_FMT_YUYV8_2X8; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 165 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 166 | |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 167 | /* |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 168 | * The two-word DMA descriptor format used by the Armada 610 and like. There |
| 169 | * Is a three-word format as well (set C1_DESC_3WORD) where the third |
| 170 | * word is a pointer to the next descriptor, but we don't use it. Two-word |
| 171 | * descriptors have to be contiguous in memory. |
| 172 | */ |
| 173 | struct mcam_dma_desc { |
| 174 | u32 dma_addr; |
| 175 | u32 segment_len; |
| 176 | }; |
| 177 | |
| 178 | /* |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 179 | * Our buffer type for working with videobuf2. Note that the vb2 |
| 180 | * developers have decreed that struct vb2_buffer must be at the |
| 181 | * beginning of this structure. |
| 182 | */ |
| 183 | struct mcam_vb_buffer { |
| 184 | struct vb2_buffer vb_buf; |
| 185 | struct list_head queue; |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 186 | struct mcam_dma_desc *dma_desc; /* Descriptor virtual address */ |
| 187 | dma_addr_t dma_desc_pa; /* Descriptor physical address */ |
| 188 | int dma_desc_nent; /* Number of mapped descriptors */ |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 189 | }; |
| 190 | |
| 191 | static inline struct mcam_vb_buffer *vb_to_mvb(struct vb2_buffer *vb) |
| 192 | { |
| 193 | return container_of(vb, struct mcam_vb_buffer, vb_buf); |
| 194 | } |
| 195 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 196 | /* |
| 197 | * Hand a completed buffer back to user space. |
| 198 | */ |
| 199 | static void mcam_buffer_done(struct mcam_camera *cam, int frame, |
| 200 | struct vb2_buffer *vbuf) |
| 201 | { |
| 202 | vbuf->v4l2_buf.bytesused = cam->pix_format.sizeimage; |
| 203 | vbuf->v4l2_buf.sequence = cam->buf_seq[frame]; |
| 204 | vb2_set_plane_payload(vbuf, 0, cam->pix_format.sizeimage); |
| 205 | vb2_buffer_done(vbuf, VB2_BUF_STATE_DONE); |
| 206 | } |
| 207 | |
| 208 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 209 | |
| 210 | /* |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 211 | * Debugging and related. |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 212 | */ |
| 213 | #define cam_err(cam, fmt, arg...) \ |
| 214 | dev_err((cam)->dev, fmt, ##arg); |
| 215 | #define cam_warn(cam, fmt, arg...) \ |
| 216 | dev_warn((cam)->dev, fmt, ##arg); |
| 217 | #define cam_dbg(cam, fmt, arg...) \ |
| 218 | dev_dbg((cam)->dev, fmt, ##arg); |
| 219 | |
| 220 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 221 | /* |
| 222 | * Flag manipulation helpers |
| 223 | */ |
| 224 | static void mcam_reset_buffers(struct mcam_camera *cam) |
| 225 | { |
| 226 | int i; |
| 227 | |
| 228 | cam->next_buf = -1; |
| 229 | for (i = 0; i < cam->nbufs; i++) |
| 230 | clear_bit(i, &cam->flags); |
| 231 | } |
| 232 | |
| 233 | static inline int mcam_needs_config(struct mcam_camera *cam) |
| 234 | { |
| 235 | return test_bit(CF_CONFIG_NEEDED, &cam->flags); |
| 236 | } |
| 237 | |
| 238 | static void mcam_set_config_needed(struct mcam_camera *cam, int needed) |
| 239 | { |
| 240 | if (needed) |
| 241 | set_bit(CF_CONFIG_NEEDED, &cam->flags); |
| 242 | else |
| 243 | clear_bit(CF_CONFIG_NEEDED, &cam->flags); |
| 244 | } |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 245 | |
| 246 | /* ------------------------------------------------------------------- */ |
| 247 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 248 | * Make the controller start grabbing images. Everything must |
| 249 | * be set up before doing this. |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 250 | */ |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 251 | static void mcam_ctlr_start(struct mcam_camera *cam) |
| 252 | { |
| 253 | /* set_bit performs a read, so no other barrier should be |
| 254 | needed here */ |
| 255 | mcam_reg_set_bit(cam, REG_CTRL0, C0_ENABLE); |
| 256 | } |
| 257 | |
| 258 | static void mcam_ctlr_stop(struct mcam_camera *cam) |
| 259 | { |
| 260 | mcam_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); |
| 261 | } |
| 262 | |
| 263 | /* ------------------------------------------------------------------- */ |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 264 | |
| 265 | #ifdef MCAM_MODE_VMALLOC |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 266 | /* |
| 267 | * Code specific to the vmalloc buffer mode. |
| 268 | */ |
| 269 | |
| 270 | /* |
| 271 | * Allocate in-kernel DMA buffers for vmalloc mode. |
| 272 | */ |
| 273 | static int mcam_alloc_dma_bufs(struct mcam_camera *cam, int loadtime) |
| 274 | { |
| 275 | int i; |
| 276 | |
| 277 | mcam_set_config_needed(cam, 1); |
| 278 | if (loadtime) |
| 279 | cam->dma_buf_size = dma_buf_size; |
| 280 | else |
| 281 | cam->dma_buf_size = cam->pix_format.sizeimage; |
| 282 | if (n_dma_bufs > 3) |
| 283 | n_dma_bufs = 3; |
| 284 | |
| 285 | cam->nbufs = 0; |
| 286 | for (i = 0; i < n_dma_bufs; i++) { |
| 287 | cam->dma_bufs[i] = dma_alloc_coherent(cam->dev, |
| 288 | cam->dma_buf_size, cam->dma_handles + i, |
| 289 | GFP_KERNEL); |
| 290 | if (cam->dma_bufs[i] == NULL) { |
| 291 | cam_warn(cam, "Failed to allocate DMA buffer\n"); |
| 292 | break; |
| 293 | } |
| 294 | (cam->nbufs)++; |
| 295 | } |
| 296 | |
| 297 | switch (cam->nbufs) { |
| 298 | case 1: |
| 299 | dma_free_coherent(cam->dev, cam->dma_buf_size, |
| 300 | cam->dma_bufs[0], cam->dma_handles[0]); |
| 301 | cam->nbufs = 0; |
| 302 | case 0: |
| 303 | cam_err(cam, "Insufficient DMA buffers, cannot operate\n"); |
| 304 | return -ENOMEM; |
| 305 | |
| 306 | case 2: |
| 307 | if (n_dma_bufs > 2) |
| 308 | cam_warn(cam, "Will limp along with only 2 buffers\n"); |
| 309 | break; |
| 310 | } |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | static void mcam_free_dma_bufs(struct mcam_camera *cam) |
| 315 | { |
| 316 | int i; |
| 317 | |
| 318 | for (i = 0; i < cam->nbufs; i++) { |
| 319 | dma_free_coherent(cam->dev, cam->dma_buf_size, |
| 320 | cam->dma_bufs[i], cam->dma_handles[i]); |
| 321 | cam->dma_bufs[i] = NULL; |
| 322 | } |
| 323 | cam->nbufs = 0; |
| 324 | } |
| 325 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 326 | |
| 327 | /* |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 328 | * Set up DMA buffers when operating in vmalloc mode |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 329 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 330 | static void mcam_ctlr_dma_vmalloc(struct mcam_camera *cam) |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 331 | { |
| 332 | /* |
| 333 | * Store the first two Y buffers (we aren't supporting |
| 334 | * planar formats for now, so no UV bufs). Then either |
| 335 | * set the third if it exists, or tell the controller |
| 336 | * to just use two. |
| 337 | */ |
| 338 | mcam_reg_write(cam, REG_Y0BAR, cam->dma_handles[0]); |
| 339 | mcam_reg_write(cam, REG_Y1BAR, cam->dma_handles[1]); |
| 340 | if (cam->nbufs > 2) { |
| 341 | mcam_reg_write(cam, REG_Y2BAR, cam->dma_handles[2]); |
| 342 | mcam_reg_clear_bit(cam, REG_CTRL1, C1_TWOBUFS); |
| 343 | } else |
| 344 | mcam_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 345 | if (cam->chip_id == V4L2_IDENT_CAFE) |
| 346 | mcam_reg_write(cam, REG_UBAR, 0); /* 32 bits only */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 347 | } |
| 348 | |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 349 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 350 | * Copy data out to user space in the vmalloc case |
| 351 | */ |
| 352 | static void mcam_frame_tasklet(unsigned long data) |
| 353 | { |
| 354 | struct mcam_camera *cam = (struct mcam_camera *) data; |
| 355 | int i; |
| 356 | unsigned long flags; |
| 357 | struct mcam_vb_buffer *buf; |
| 358 | |
| 359 | spin_lock_irqsave(&cam->dev_lock, flags); |
| 360 | for (i = 0; i < cam->nbufs; i++) { |
| 361 | int bufno = cam->next_buf; |
| 362 | |
| 363 | if (cam->state != S_STREAMING || bufno < 0) |
| 364 | break; /* I/O got stopped */ |
| 365 | if (++(cam->next_buf) >= cam->nbufs) |
| 366 | cam->next_buf = 0; |
| 367 | if (!test_bit(bufno, &cam->flags)) |
| 368 | continue; |
| 369 | if (list_empty(&cam->buffers)) { |
| 370 | singles++; |
| 371 | break; /* Leave it valid, hope for better later */ |
| 372 | } |
| 373 | delivered++; |
| 374 | clear_bit(bufno, &cam->flags); |
| 375 | buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, |
| 376 | queue); |
| 377 | list_del_init(&buf->queue); |
| 378 | /* |
| 379 | * Drop the lock during the big copy. This *should* be safe... |
| 380 | */ |
| 381 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 382 | memcpy(vb2_plane_vaddr(&buf->vb_buf, 0), cam->dma_bufs[bufno], |
| 383 | cam->pix_format.sizeimage); |
| 384 | mcam_buffer_done(cam, bufno, &buf->vb_buf); |
| 385 | spin_lock_irqsave(&cam->dev_lock, flags); |
| 386 | } |
| 387 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 388 | } |
| 389 | |
| 390 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 391 | /* |
| 392 | * Make sure our allocated buffers are up to the task. |
| 393 | */ |
| 394 | static int mcam_check_dma_buffers(struct mcam_camera *cam) |
| 395 | { |
| 396 | if (cam->nbufs > 0 && cam->dma_buf_size < cam->pix_format.sizeimage) |
| 397 | mcam_free_dma_bufs(cam); |
| 398 | if (cam->nbufs == 0) |
| 399 | return mcam_alloc_dma_bufs(cam, 0); |
| 400 | return 0; |
| 401 | } |
| 402 | |
| 403 | static void mcam_vmalloc_done(struct mcam_camera *cam, int frame) |
| 404 | { |
| 405 | tasklet_schedule(&cam->s_tasklet); |
| 406 | } |
| 407 | |
| 408 | #else /* MCAM_MODE_VMALLOC */ |
| 409 | |
| 410 | static inline int mcam_alloc_dma_bufs(struct mcam_camera *cam, int loadtime) |
| 411 | { |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static inline void mcam_free_dma_bufs(struct mcam_camera *cam) |
| 416 | { |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | static inline int mcam_check_dma_buffers(struct mcam_camera *cam) |
| 421 | { |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | |
| 426 | |
| 427 | #endif /* MCAM_MODE_VMALLOC */ |
| 428 | |
| 429 | |
| 430 | #ifdef MCAM_MODE_DMA_CONTIG |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 431 | /* ---------------------------------------------------------------------- */ |
| 432 | /* |
| 433 | * DMA-contiguous code. |
| 434 | */ |
| 435 | /* |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 436 | * Set up a contiguous buffer for the given frame. Here also is where |
| 437 | * the underrun strategy is set: if there is no buffer available, reuse |
| 438 | * the buffer from the other BAR and set the CF_SINGLE_BUFFER flag to |
| 439 | * keep the interrupt handler from giving that buffer back to user |
| 440 | * space. In this way, we always have a buffer to DMA to and don't |
| 441 | * have to try to play games stopping and restarting the controller. |
| 442 | */ |
| 443 | static void mcam_set_contig_buffer(struct mcam_camera *cam, int frame) |
| 444 | { |
| 445 | struct mcam_vb_buffer *buf; |
| 446 | /* |
| 447 | * If there are no available buffers, go into single mode |
| 448 | */ |
| 449 | if (list_empty(&cam->buffers)) { |
| 450 | buf = cam->vb_bufs[frame ^ 0x1]; |
| 451 | cam->vb_bufs[frame] = buf; |
| 452 | mcam_reg_write(cam, frame == 0 ? REG_Y0BAR : REG_Y1BAR, |
Marek Szyprowski | ba7fcb0 | 2011-08-29 03:20:56 -0300 | [diff] [blame] | 453 | vb2_dma_contig_plane_dma_addr(&buf->vb_buf, 0)); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 454 | set_bit(CF_SINGLE_BUFFER, &cam->flags); |
| 455 | singles++; |
| 456 | return; |
| 457 | } |
| 458 | /* |
| 459 | * OK, we have a buffer we can use. |
| 460 | */ |
| 461 | buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue); |
| 462 | list_del_init(&buf->queue); |
| 463 | mcam_reg_write(cam, frame == 0 ? REG_Y0BAR : REG_Y1BAR, |
Marek Szyprowski | ba7fcb0 | 2011-08-29 03:20:56 -0300 | [diff] [blame] | 464 | vb2_dma_contig_plane_dma_addr(&buf->vb_buf, 0)); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 465 | cam->vb_bufs[frame] = buf; |
| 466 | clear_bit(CF_SINGLE_BUFFER, &cam->flags); |
| 467 | } |
| 468 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 469 | /* |
| 470 | * Initial B_DMA_contig setup. |
| 471 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 472 | static void mcam_ctlr_dma_contig(struct mcam_camera *cam) |
| 473 | { |
| 474 | mcam_reg_set_bit(cam, REG_CTRL1, C1_TWOBUFS); |
| 475 | cam->nbufs = 2; |
| 476 | mcam_set_contig_buffer(cam, 0); |
| 477 | mcam_set_contig_buffer(cam, 1); |
| 478 | } |
| 479 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 480 | /* |
| 481 | * Frame completion handling. |
| 482 | */ |
| 483 | static void mcam_dma_contig_done(struct mcam_camera *cam, int frame) |
| 484 | { |
| 485 | struct mcam_vb_buffer *buf = cam->vb_bufs[frame]; |
| 486 | |
| 487 | if (!test_bit(CF_SINGLE_BUFFER, &cam->flags)) { |
| 488 | delivered++; |
| 489 | mcam_buffer_done(cam, frame, &buf->vb_buf); |
| 490 | } |
| 491 | mcam_set_contig_buffer(cam, frame); |
| 492 | } |
| 493 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 494 | #endif /* MCAM_MODE_DMA_CONTIG */ |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 495 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 496 | #ifdef MCAM_MODE_DMA_SG |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 497 | /* ---------------------------------------------------------------------- */ |
| 498 | /* |
| 499 | * Scatter/gather-specific code. |
| 500 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 501 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 502 | /* |
| 503 | * Set up the next buffer for S/G I/O; caller should be sure that |
| 504 | * the controller is stopped and a buffer is available. |
| 505 | */ |
| 506 | static void mcam_sg_next_buffer(struct mcam_camera *cam) |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 507 | { |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 508 | struct mcam_vb_buffer *buf; |
| 509 | |
| 510 | buf = list_first_entry(&cam->buffers, struct mcam_vb_buffer, queue); |
| 511 | list_del_init(&buf->queue); |
| 512 | mcam_reg_write(cam, REG_DMA_DESC_Y, buf->dma_desc_pa); |
| 513 | mcam_reg_write(cam, REG_DESC_LEN_Y, |
| 514 | buf->dma_desc_nent*sizeof(struct mcam_dma_desc)); |
| 515 | mcam_reg_write(cam, REG_DESC_LEN_U, 0); |
| 516 | mcam_reg_write(cam, REG_DESC_LEN_V, 0); |
| 517 | cam->vb_bufs[0] = buf; |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 518 | } |
| 519 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 520 | /* |
| 521 | * Initial B_DMA_sg setup |
| 522 | */ |
| 523 | static void mcam_ctlr_dma_sg(struct mcam_camera *cam) |
| 524 | { |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 525 | /* |
| 526 | * The list-empty condition can hit us at resume time |
| 527 | * if the buffer list was empty when the system was suspended. |
| 528 | */ |
| 529 | if (list_empty(&cam->buffers)) { |
| 530 | set_bit(CF_SG_RESTART, &cam->flags); |
| 531 | return; |
| 532 | } |
| 533 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 534 | mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_3WORD); |
| 535 | mcam_sg_next_buffer(cam); |
| 536 | mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA); |
| 537 | cam->nbufs = 3; |
| 538 | } |
| 539 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 540 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 541 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 542 | * Frame completion with S/G is trickier. We can't muck with |
| 543 | * a descriptor chain on the fly, since the controller buffers it |
| 544 | * internally. So we have to actually stop and restart; Marvell |
| 545 | * says this is the way to do it. |
| 546 | * |
| 547 | * Of course, stopping is easier said than done; experience shows |
| 548 | * that the controller can start a frame *after* C0_ENABLE has been |
| 549 | * cleared. So when running in S/G mode, the controller is "stopped" |
| 550 | * on receipt of the start-of-frame interrupt. That means we can |
| 551 | * safely change the DMA descriptor array here and restart things |
| 552 | * (assuming there's another buffer waiting to go). |
| 553 | */ |
| 554 | static void mcam_dma_sg_done(struct mcam_camera *cam, int frame) |
| 555 | { |
| 556 | struct mcam_vb_buffer *buf = cam->vb_bufs[0]; |
| 557 | |
| 558 | /* |
Jonathan Corbet | 49df19e | 2012-03-16 19:14:50 -0300 | [diff] [blame] | 559 | * If we're no longer supposed to be streaming, don't do anything. |
| 560 | */ |
| 561 | if (cam->state != S_STREAMING) |
| 562 | return; |
| 563 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 564 | * Very Bad Not Good Things happen if you don't clear |
| 565 | * C1_DESC_ENA before making any descriptor changes. |
| 566 | */ |
| 567 | mcam_reg_clear_bit(cam, REG_CTRL1, C1_DESC_ENA); |
| 568 | /* |
| 569 | * If we have another buffer available, put it in and |
| 570 | * restart the engine. |
| 571 | */ |
| 572 | if (!list_empty(&cam->buffers)) { |
| 573 | mcam_sg_next_buffer(cam); |
| 574 | mcam_reg_set_bit(cam, REG_CTRL1, C1_DESC_ENA); |
| 575 | mcam_ctlr_start(cam); |
| 576 | /* |
| 577 | * Otherwise set CF_SG_RESTART and the controller will |
| 578 | * be restarted once another buffer shows up. |
| 579 | */ |
| 580 | } else { |
| 581 | set_bit(CF_SG_RESTART, &cam->flags); |
| 582 | singles++; |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 583 | cam->vb_bufs[0] = NULL; |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 584 | } |
| 585 | /* |
| 586 | * Now we can give the completed frame back to user space. |
| 587 | */ |
| 588 | delivered++; |
| 589 | mcam_buffer_done(cam, frame, &buf->vb_buf); |
| 590 | } |
| 591 | |
| 592 | |
| 593 | /* |
| 594 | * Scatter/gather mode requires stopping the controller between |
| 595 | * frames so we can put in a new DMA descriptor array. If no new |
| 596 | * buffer exists at frame completion, the controller is left stopped; |
| 597 | * this function is charged with gettig things going again. |
| 598 | */ |
| 599 | static void mcam_sg_restart(struct mcam_camera *cam) |
| 600 | { |
| 601 | mcam_ctlr_dma_sg(cam); |
| 602 | mcam_ctlr_start(cam); |
| 603 | clear_bit(CF_SG_RESTART, &cam->flags); |
| 604 | } |
| 605 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 606 | #else /* MCAM_MODE_DMA_SG */ |
| 607 | |
| 608 | static inline void mcam_sg_restart(struct mcam_camera *cam) |
| 609 | { |
| 610 | return; |
| 611 | } |
| 612 | |
| 613 | #endif /* MCAM_MODE_DMA_SG */ |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 614 | |
| 615 | /* ---------------------------------------------------------------------- */ |
| 616 | /* |
| 617 | * Buffer-mode-independent controller code. |
| 618 | */ |
| 619 | |
| 620 | /* |
| 621 | * Image format setup |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 622 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 623 | static void mcam_ctlr_image(struct mcam_camera *cam) |
| 624 | { |
| 625 | int imgsz; |
| 626 | struct v4l2_pix_format *fmt = &cam->pix_format; |
| 627 | |
| 628 | imgsz = ((fmt->height << IMGSZ_V_SHIFT) & IMGSZ_V_MASK) | |
| 629 | (fmt->bytesperline & IMGSZ_H_MASK); |
| 630 | mcam_reg_write(cam, REG_IMGSIZE, imgsz); |
| 631 | mcam_reg_write(cam, REG_IMGOFFSET, 0); |
| 632 | /* YPITCH just drops the last two bits */ |
| 633 | mcam_reg_write_mask(cam, REG_IMGPITCH, fmt->bytesperline, |
| 634 | IMGP_YP_MASK); |
| 635 | /* |
| 636 | * Tell the controller about the image format we are using. |
| 637 | */ |
| 638 | switch (cam->pix_format.pixelformat) { |
| 639 | case V4L2_PIX_FMT_YUYV: |
| 640 | mcam_reg_write_mask(cam, REG_CTRL0, |
| 641 | C0_DF_YUV|C0_YUV_PACKED|C0_YUVE_YUYV, |
| 642 | C0_DF_MASK); |
| 643 | break; |
| 644 | |
| 645 | case V4L2_PIX_FMT_RGB444: |
| 646 | mcam_reg_write_mask(cam, REG_CTRL0, |
| 647 | C0_DF_RGB|C0_RGBF_444|C0_RGB4_XRGB, |
| 648 | C0_DF_MASK); |
| 649 | /* Alpha value? */ |
| 650 | break; |
| 651 | |
| 652 | case V4L2_PIX_FMT_RGB565: |
| 653 | mcam_reg_write_mask(cam, REG_CTRL0, |
| 654 | C0_DF_RGB|C0_RGBF_565|C0_RGB5_BGGR, |
| 655 | C0_DF_MASK); |
| 656 | break; |
| 657 | |
| 658 | default: |
| 659 | cam_err(cam, "Unknown format %x\n", cam->pix_format.pixelformat); |
| 660 | break; |
| 661 | } |
| 662 | /* |
| 663 | * Make sure it knows we want to use hsync/vsync. |
| 664 | */ |
| 665 | mcam_reg_write_mask(cam, REG_CTRL0, C0_SIF_HVSYNC, |
| 666 | C0_SIFM_MASK); |
| 667 | } |
| 668 | |
| 669 | |
| 670 | /* |
| 671 | * Configure the controller for operation; caller holds the |
| 672 | * device mutex. |
| 673 | */ |
| 674 | static int mcam_ctlr_configure(struct mcam_camera *cam) |
| 675 | { |
| 676 | unsigned long flags; |
| 677 | |
| 678 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 679 | clear_bit(CF_SG_RESTART, &cam->flags); |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 680 | cam->dma_setup(cam); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 681 | mcam_ctlr_image(cam); |
| 682 | mcam_set_config_needed(cam, 0); |
| 683 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 684 | return 0; |
| 685 | } |
| 686 | |
| 687 | static void mcam_ctlr_irq_enable(struct mcam_camera *cam) |
| 688 | { |
| 689 | /* |
| 690 | * Clear any pending interrupts, since we do not |
| 691 | * expect to have I/O active prior to enabling. |
| 692 | */ |
| 693 | mcam_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); |
| 694 | mcam_reg_set_bit(cam, REG_IRQMASK, FRAMEIRQS); |
| 695 | } |
| 696 | |
| 697 | static void mcam_ctlr_irq_disable(struct mcam_camera *cam) |
| 698 | { |
| 699 | mcam_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); |
| 700 | } |
| 701 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 702 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 703 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 704 | static void mcam_ctlr_init(struct mcam_camera *cam) |
| 705 | { |
| 706 | unsigned long flags; |
| 707 | |
| 708 | spin_lock_irqsave(&cam->dev_lock, flags); |
| 709 | /* |
| 710 | * Make sure it's not powered down. |
| 711 | */ |
| 712 | mcam_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); |
| 713 | /* |
| 714 | * Turn off the enable bit. It sure should be off anyway, |
| 715 | * but it's good to be sure. |
| 716 | */ |
| 717 | mcam_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); |
| 718 | /* |
| 719 | * Clock the sensor appropriately. Controller clock should |
| 720 | * be 48MHz, sensor "typical" value is half that. |
| 721 | */ |
| 722 | mcam_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); |
| 723 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 724 | } |
| 725 | |
| 726 | |
| 727 | /* |
| 728 | * Stop the controller, and don't return until we're really sure that no |
| 729 | * further DMA is going on. |
| 730 | */ |
| 731 | static void mcam_ctlr_stop_dma(struct mcam_camera *cam) |
| 732 | { |
| 733 | unsigned long flags; |
| 734 | |
| 735 | /* |
| 736 | * Theory: stop the camera controller (whether it is operating |
| 737 | * or not). Delay briefly just in case we race with the SOF |
| 738 | * interrupt, then wait until no DMA is active. |
| 739 | */ |
| 740 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 741 | clear_bit(CF_SG_RESTART, &cam->flags); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 742 | mcam_ctlr_stop(cam); |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 743 | cam->state = S_IDLE; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 744 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
Jonathan Corbet | 482d35c | 2012-03-16 19:14:52 -0300 | [diff] [blame^] | 745 | /* |
| 746 | * This is a brutally long sleep, but experience shows that |
| 747 | * it can take the controller a while to get the message that |
| 748 | * it needs to stop grabbing frames. In particular, we can |
| 749 | * sometimes (on mmp) get a frame at the end WITHOUT the |
| 750 | * start-of-frame indication. |
| 751 | */ |
| 752 | msleep(150); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 753 | if (test_bit(CF_DMA_ACTIVE, &cam->flags)) |
| 754 | cam_err(cam, "Timeout waiting for DMA to end\n"); |
| 755 | /* This would be bad news - what now? */ |
| 756 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 757 | mcam_ctlr_irq_disable(cam); |
| 758 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * Power up and down. |
| 763 | */ |
| 764 | static void mcam_ctlr_power_up(struct mcam_camera *cam) |
| 765 | { |
| 766 | unsigned long flags; |
| 767 | |
| 768 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 769 | cam->plat_power_up(cam); |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 770 | mcam_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 771 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 772 | msleep(5); /* Just to be sure */ |
| 773 | } |
| 774 | |
| 775 | static void mcam_ctlr_power_down(struct mcam_camera *cam) |
| 776 | { |
| 777 | unsigned long flags; |
| 778 | |
| 779 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 780 | /* |
| 781 | * School of hard knocks department: be sure we do any register |
| 782 | * twiddling on the controller *before* calling the platform |
| 783 | * power down routine. |
| 784 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 785 | mcam_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 786 | cam->plat_power_down(cam); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 787 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 788 | } |
| 789 | |
| 790 | /* -------------------------------------------------------------------- */ |
| 791 | /* |
| 792 | * Communications with the sensor. |
| 793 | */ |
| 794 | |
| 795 | static int __mcam_cam_reset(struct mcam_camera *cam) |
| 796 | { |
| 797 | return sensor_call(cam, core, reset, 0); |
| 798 | } |
| 799 | |
| 800 | /* |
| 801 | * We have found the sensor on the i2c. Let's try to have a |
| 802 | * conversation. |
| 803 | */ |
| 804 | static int mcam_cam_init(struct mcam_camera *cam) |
| 805 | { |
| 806 | struct v4l2_dbg_chip_ident chip; |
| 807 | int ret; |
| 808 | |
| 809 | mutex_lock(&cam->s_mutex); |
| 810 | if (cam->state != S_NOTREADY) |
| 811 | cam_warn(cam, "Cam init with device in funky state %d", |
| 812 | cam->state); |
| 813 | ret = __mcam_cam_reset(cam); |
| 814 | if (ret) |
| 815 | goto out; |
| 816 | chip.ident = V4L2_IDENT_NONE; |
| 817 | chip.match.type = V4L2_CHIP_MATCH_I2C_ADDR; |
| 818 | chip.match.addr = cam->sensor_addr; |
| 819 | ret = sensor_call(cam, core, g_chip_ident, &chip); |
| 820 | if (ret) |
| 821 | goto out; |
| 822 | cam->sensor_type = chip.ident; |
| 823 | if (cam->sensor_type != V4L2_IDENT_OV7670) { |
| 824 | cam_err(cam, "Unsupported sensor type 0x%x", cam->sensor_type); |
| 825 | ret = -EINVAL; |
| 826 | goto out; |
| 827 | } |
| 828 | /* Get/set parameters? */ |
| 829 | ret = 0; |
| 830 | cam->state = S_IDLE; |
| 831 | out: |
| 832 | mcam_ctlr_power_down(cam); |
| 833 | mutex_unlock(&cam->s_mutex); |
| 834 | return ret; |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Configure the sensor to match the parameters we have. Caller should |
| 839 | * hold s_mutex |
| 840 | */ |
| 841 | static int mcam_cam_set_flip(struct mcam_camera *cam) |
| 842 | { |
| 843 | struct v4l2_control ctrl; |
| 844 | |
| 845 | memset(&ctrl, 0, sizeof(ctrl)); |
| 846 | ctrl.id = V4L2_CID_VFLIP; |
| 847 | ctrl.value = flip; |
| 848 | return sensor_call(cam, core, s_ctrl, &ctrl); |
| 849 | } |
| 850 | |
| 851 | |
| 852 | static int mcam_cam_configure(struct mcam_camera *cam) |
| 853 | { |
| 854 | struct v4l2_mbus_framefmt mbus_fmt; |
| 855 | int ret; |
| 856 | |
| 857 | v4l2_fill_mbus_format(&mbus_fmt, &cam->pix_format, cam->mbus_code); |
| 858 | ret = sensor_call(cam, core, init, 0); |
| 859 | if (ret == 0) |
| 860 | ret = sensor_call(cam, video, s_mbus_fmt, &mbus_fmt); |
| 861 | /* |
| 862 | * OV7670 does weird things if flip is set *before* format... |
| 863 | */ |
| 864 | ret += mcam_cam_set_flip(cam); |
| 865 | return ret; |
| 866 | } |
| 867 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 868 | /* |
| 869 | * Get everything ready, and start grabbing frames. |
| 870 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 871 | static int mcam_read_setup(struct mcam_camera *cam) |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 872 | { |
| 873 | int ret; |
| 874 | unsigned long flags; |
| 875 | |
| 876 | /* |
| 877 | * Configuration. If we still don't have DMA buffers, |
| 878 | * make one last, desperate attempt. |
| 879 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 880 | if (cam->buffer_mode == B_vmalloc && cam->nbufs == 0 && |
| 881 | mcam_alloc_dma_bufs(cam, 0)) |
| 882 | return -ENOMEM; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 883 | |
| 884 | if (mcam_needs_config(cam)) { |
| 885 | mcam_cam_configure(cam); |
| 886 | ret = mcam_ctlr_configure(cam); |
| 887 | if (ret) |
| 888 | return ret; |
| 889 | } |
| 890 | |
| 891 | /* |
| 892 | * Turn it loose. |
| 893 | */ |
| 894 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | 482d35c | 2012-03-16 19:14:52 -0300 | [diff] [blame^] | 895 | clear_bit(CF_DMA_ACTIVE, &cam->flags); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 896 | mcam_reset_buffers(cam); |
| 897 | mcam_ctlr_irq_enable(cam); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 898 | cam->state = S_STREAMING; |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 899 | if (!test_bit(CF_SG_RESTART, &cam->flags)) |
| 900 | mcam_ctlr_start(cam); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 901 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 902 | return 0; |
| 903 | } |
| 904 | |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 905 | /* ----------------------------------------------------------------------- */ |
| 906 | /* |
| 907 | * Videobuf2 interface code. |
| 908 | */ |
| 909 | |
Guennadi Liakhovetski | fc714e7 | 2011-08-24 10:30:21 -0300 | [diff] [blame] | 910 | static int mcam_vb_queue_setup(struct vb2_queue *vq, |
| 911 | const struct v4l2_format *fmt, unsigned int *nbufs, |
Marek Szyprowski | 035aa14 | 2011-08-24 06:43:36 -0300 | [diff] [blame] | 912 | unsigned int *num_planes, unsigned int sizes[], |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 913 | void *alloc_ctxs[]) |
| 914 | { |
| 915 | struct mcam_camera *cam = vb2_get_drv_priv(vq); |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 916 | int minbufs = (cam->buffer_mode == B_DMA_contig) ? 3 : 2; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 917 | |
| 918 | sizes[0] = cam->pix_format.sizeimage; |
| 919 | *num_planes = 1; /* Someday we have to support planar formats... */ |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 920 | if (*nbufs < minbufs) |
| 921 | *nbufs = minbufs; |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 922 | if (cam->buffer_mode == B_DMA_contig) |
| 923 | alloc_ctxs[0] = cam->vb_alloc_ctx; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 924 | return 0; |
| 925 | } |
| 926 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 927 | |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 928 | static void mcam_vb_buf_queue(struct vb2_buffer *vb) |
| 929 | { |
| 930 | struct mcam_vb_buffer *mvb = vb_to_mvb(vb); |
| 931 | struct mcam_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
| 932 | unsigned long flags; |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 933 | int start; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 934 | |
| 935 | spin_lock_irqsave(&cam->dev_lock, flags); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 936 | start = (cam->state == S_BUFWAIT) && !list_empty(&cam->buffers); |
| 937 | list_add(&mvb->queue, &cam->buffers); |
Jonathan Corbet | 49df19e | 2012-03-16 19:14:50 -0300 | [diff] [blame] | 938 | if (cam->state == S_STREAMING && test_bit(CF_SG_RESTART, &cam->flags)) |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 939 | mcam_sg_restart(cam); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 940 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 941 | if (start) |
| 942 | mcam_read_setup(cam); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 943 | } |
| 944 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 945 | |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 946 | /* |
| 947 | * vb2 uses these to release the mutex when waiting in dqbuf. I'm |
| 948 | * not actually sure we need to do this (I'm not sure that vb2_dqbuf() needs |
| 949 | * to be called with the mutex held), but better safe than sorry. |
| 950 | */ |
| 951 | static void mcam_vb_wait_prepare(struct vb2_queue *vq) |
| 952 | { |
| 953 | struct mcam_camera *cam = vb2_get_drv_priv(vq); |
| 954 | |
| 955 | mutex_unlock(&cam->s_mutex); |
| 956 | } |
| 957 | |
| 958 | static void mcam_vb_wait_finish(struct vb2_queue *vq) |
| 959 | { |
| 960 | struct mcam_camera *cam = vb2_get_drv_priv(vq); |
| 961 | |
| 962 | mutex_lock(&cam->s_mutex); |
| 963 | } |
| 964 | |
| 965 | /* |
| 966 | * These need to be called with the mutex held from vb2 |
| 967 | */ |
Marek Szyprowski | bd323e2 | 2011-08-29 08:51:49 -0300 | [diff] [blame] | 968 | static int mcam_vb_start_streaming(struct vb2_queue *vq, unsigned int count) |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 969 | { |
| 970 | struct mcam_camera *cam = vb2_get_drv_priv(vq); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 971 | |
Marek Szyprowski | bd323e2 | 2011-08-29 08:51:49 -0300 | [diff] [blame] | 972 | if (cam->state != S_IDLE) { |
| 973 | INIT_LIST_HEAD(&cam->buffers); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 974 | return -EINVAL; |
Marek Szyprowski | bd323e2 | 2011-08-29 08:51:49 -0300 | [diff] [blame] | 975 | } |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 976 | cam->sequence = 0; |
| 977 | /* |
| 978 | * Videobuf2 sneakily hoards all the buffers and won't |
| 979 | * give them to us until *after* streaming starts. But |
| 980 | * we can't actually start streaming until we have a |
| 981 | * destination. So go into a wait state and hope they |
| 982 | * give us buffers soon. |
| 983 | */ |
| 984 | if (cam->buffer_mode != B_vmalloc && list_empty(&cam->buffers)) { |
| 985 | cam->state = S_BUFWAIT; |
| 986 | return 0; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 987 | } |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 988 | return mcam_read_setup(cam); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 989 | } |
| 990 | |
| 991 | static int mcam_vb_stop_streaming(struct vb2_queue *vq) |
| 992 | { |
| 993 | struct mcam_camera *cam = vb2_get_drv_priv(vq); |
| 994 | unsigned long flags; |
| 995 | |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 996 | if (cam->state == S_BUFWAIT) { |
| 997 | /* They never gave us buffers */ |
| 998 | cam->state = S_IDLE; |
| 999 | return 0; |
| 1000 | } |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1001 | if (cam->state != S_STREAMING) |
| 1002 | return -EINVAL; |
| 1003 | mcam_ctlr_stop_dma(cam); |
| 1004 | /* |
| 1005 | * VB2 reclaims the buffers, so we need to forget |
| 1006 | * about them. |
| 1007 | */ |
| 1008 | spin_lock_irqsave(&cam->dev_lock, flags); |
| 1009 | INIT_LIST_HEAD(&cam->buffers); |
| 1010 | spin_unlock_irqrestore(&cam->dev_lock, flags); |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | static const struct vb2_ops mcam_vb2_ops = { |
| 1016 | .queue_setup = mcam_vb_queue_setup, |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1017 | .buf_queue = mcam_vb_buf_queue, |
| 1018 | .start_streaming = mcam_vb_start_streaming, |
| 1019 | .stop_streaming = mcam_vb_stop_streaming, |
| 1020 | .wait_prepare = mcam_vb_wait_prepare, |
| 1021 | .wait_finish = mcam_vb_wait_finish, |
| 1022 | }; |
| 1023 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1024 | |
| 1025 | #ifdef MCAM_MODE_DMA_SG |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1026 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1027 | * Scatter/gather mode uses all of the above functions plus a |
| 1028 | * few extras to deal with DMA mapping. |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1029 | */ |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1030 | static int mcam_vb_sg_buf_init(struct vb2_buffer *vb) |
| 1031 | { |
| 1032 | struct mcam_vb_buffer *mvb = vb_to_mvb(vb); |
| 1033 | struct mcam_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
| 1034 | int ndesc = cam->pix_format.sizeimage/PAGE_SIZE + 1; |
| 1035 | |
| 1036 | mvb->dma_desc = dma_alloc_coherent(cam->dev, |
| 1037 | ndesc * sizeof(struct mcam_dma_desc), |
| 1038 | &mvb->dma_desc_pa, GFP_KERNEL); |
| 1039 | if (mvb->dma_desc == NULL) { |
| 1040 | cam_err(cam, "Unable to get DMA descriptor array\n"); |
| 1041 | return -ENOMEM; |
| 1042 | } |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | static int mcam_vb_sg_buf_prepare(struct vb2_buffer *vb) |
| 1047 | { |
| 1048 | struct mcam_vb_buffer *mvb = vb_to_mvb(vb); |
| 1049 | struct mcam_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
| 1050 | struct vb2_dma_sg_desc *sgd = vb2_dma_sg_plane_desc(vb, 0); |
| 1051 | struct mcam_dma_desc *desc = mvb->dma_desc; |
| 1052 | struct scatterlist *sg; |
| 1053 | int i; |
| 1054 | |
| 1055 | mvb->dma_desc_nent = dma_map_sg(cam->dev, sgd->sglist, sgd->num_pages, |
| 1056 | DMA_FROM_DEVICE); |
| 1057 | if (mvb->dma_desc_nent <= 0) |
| 1058 | return -EIO; /* Not sure what's right here */ |
| 1059 | for_each_sg(sgd->sglist, sg, mvb->dma_desc_nent, i) { |
| 1060 | desc->dma_addr = sg_dma_address(sg); |
| 1061 | desc->segment_len = sg_dma_len(sg); |
| 1062 | desc++; |
| 1063 | } |
| 1064 | return 0; |
| 1065 | } |
| 1066 | |
| 1067 | static int mcam_vb_sg_buf_finish(struct vb2_buffer *vb) |
| 1068 | { |
| 1069 | struct mcam_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
| 1070 | struct vb2_dma_sg_desc *sgd = vb2_dma_sg_plane_desc(vb, 0); |
| 1071 | |
| 1072 | dma_unmap_sg(cam->dev, sgd->sglist, sgd->num_pages, DMA_FROM_DEVICE); |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
| 1076 | static void mcam_vb_sg_buf_cleanup(struct vb2_buffer *vb) |
| 1077 | { |
| 1078 | struct mcam_camera *cam = vb2_get_drv_priv(vb->vb2_queue); |
| 1079 | struct mcam_vb_buffer *mvb = vb_to_mvb(vb); |
| 1080 | int ndesc = cam->pix_format.sizeimage/PAGE_SIZE + 1; |
| 1081 | |
| 1082 | dma_free_coherent(cam->dev, ndesc * sizeof(struct mcam_dma_desc), |
| 1083 | mvb->dma_desc, mvb->dma_desc_pa); |
| 1084 | } |
| 1085 | |
| 1086 | |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1087 | static const struct vb2_ops mcam_vb2_sg_ops = { |
| 1088 | .queue_setup = mcam_vb_queue_setup, |
| 1089 | .buf_init = mcam_vb_sg_buf_init, |
| 1090 | .buf_prepare = mcam_vb_sg_buf_prepare, |
| 1091 | .buf_queue = mcam_vb_buf_queue, |
| 1092 | .buf_finish = mcam_vb_sg_buf_finish, |
| 1093 | .buf_cleanup = mcam_vb_sg_buf_cleanup, |
| 1094 | .start_streaming = mcam_vb_start_streaming, |
| 1095 | .stop_streaming = mcam_vb_stop_streaming, |
| 1096 | .wait_prepare = mcam_vb_wait_prepare, |
| 1097 | .wait_finish = mcam_vb_wait_finish, |
| 1098 | }; |
| 1099 | |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1100 | #endif /* MCAM_MODE_DMA_SG */ |
| 1101 | |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1102 | static int mcam_setup_vb2(struct mcam_camera *cam) |
| 1103 | { |
| 1104 | struct vb2_queue *vq = &cam->vb_queue; |
| 1105 | |
| 1106 | memset(vq, 0, sizeof(*vq)); |
| 1107 | vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1108 | vq->drv_priv = cam; |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1109 | INIT_LIST_HEAD(&cam->buffers); |
| 1110 | switch (cam->buffer_mode) { |
| 1111 | case B_DMA_contig: |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1112 | #ifdef MCAM_MODE_DMA_CONTIG |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1113 | vq->ops = &mcam_vb2_ops; |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1114 | vq->mem_ops = &vb2_dma_contig_memops; |
| 1115 | cam->vb_alloc_ctx = vb2_dma_contig_init_ctx(cam->dev); |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1116 | vq->io_modes = VB2_MMAP | VB2_USERPTR; |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1117 | cam->dma_setup = mcam_ctlr_dma_contig; |
| 1118 | cam->frame_complete = mcam_dma_contig_done; |
| 1119 | #endif |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1120 | break; |
| 1121 | case B_DMA_sg: |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1122 | #ifdef MCAM_MODE_DMA_SG |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1123 | vq->ops = &mcam_vb2_sg_ops; |
| 1124 | vq->mem_ops = &vb2_dma_sg_memops; |
| 1125 | vq->io_modes = VB2_MMAP | VB2_USERPTR; |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1126 | cam->dma_setup = mcam_ctlr_dma_sg; |
| 1127 | cam->frame_complete = mcam_dma_sg_done; |
| 1128 | #endif |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1129 | break; |
| 1130 | case B_vmalloc: |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1131 | #ifdef MCAM_MODE_VMALLOC |
| 1132 | tasklet_init(&cam->s_tasklet, mcam_frame_tasklet, |
| 1133 | (unsigned long) cam); |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1134 | vq->ops = &mcam_vb2_ops; |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1135 | vq->mem_ops = &vb2_vmalloc_memops; |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1136 | vq->buf_struct_size = sizeof(struct mcam_vb_buffer); |
| 1137 | vq->io_modes = VB2_MMAP; |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1138 | cam->dma_setup = mcam_ctlr_dma_vmalloc; |
| 1139 | cam->frame_complete = mcam_vmalloc_done; |
| 1140 | #endif |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1141 | break; |
| 1142 | } |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1143 | return vb2_queue_init(vq); |
| 1144 | } |
| 1145 | |
| 1146 | static void mcam_cleanup_vb2(struct mcam_camera *cam) |
| 1147 | { |
| 1148 | vb2_queue_release(&cam->vb_queue); |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1149 | #ifdef MCAM_MODE_DMA_CONTIG |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1150 | if (cam->buffer_mode == B_DMA_contig) |
| 1151 | vb2_dma_contig_cleanup_ctx(cam->vb_alloc_ctx); |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1152 | #endif |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1153 | } |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1154 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1155 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1156 | /* ---------------------------------------------------------------------- */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1157 | /* |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1158 | * The long list of V4L2 ioctl() operations. |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1159 | */ |
| 1160 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1161 | static int mcam_vidioc_streamon(struct file *filp, void *priv, |
| 1162 | enum v4l2_buf_type type) |
| 1163 | { |
| 1164 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1165 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1166 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1167 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1168 | ret = vb2_streamon(&cam->vb_queue, type); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1169 | mutex_unlock(&cam->s_mutex); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1170 | return ret; |
| 1171 | } |
| 1172 | |
| 1173 | |
| 1174 | static int mcam_vidioc_streamoff(struct file *filp, void *priv, |
| 1175 | enum v4l2_buf_type type) |
| 1176 | { |
| 1177 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1178 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1179 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1180 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1181 | ret = vb2_streamoff(&cam->vb_queue, type); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1182 | mutex_unlock(&cam->s_mutex); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1183 | return ret; |
| 1184 | } |
| 1185 | |
| 1186 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1187 | static int mcam_vidioc_reqbufs(struct file *filp, void *priv, |
| 1188 | struct v4l2_requestbuffers *req) |
| 1189 | { |
| 1190 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1191 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1192 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1193 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1194 | ret = vb2_reqbufs(&cam->vb_queue, req); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1195 | mutex_unlock(&cam->s_mutex); |
| 1196 | return ret; |
| 1197 | } |
| 1198 | |
| 1199 | |
| 1200 | static int mcam_vidioc_querybuf(struct file *filp, void *priv, |
| 1201 | struct v4l2_buffer *buf) |
| 1202 | { |
| 1203 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1204 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1205 | |
| 1206 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1207 | ret = vb2_querybuf(&cam->vb_queue, buf); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1208 | mutex_unlock(&cam->s_mutex); |
| 1209 | return ret; |
| 1210 | } |
| 1211 | |
| 1212 | static int mcam_vidioc_qbuf(struct file *filp, void *priv, |
| 1213 | struct v4l2_buffer *buf) |
| 1214 | { |
| 1215 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1216 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1217 | |
| 1218 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1219 | ret = vb2_qbuf(&cam->vb_queue, buf); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1220 | mutex_unlock(&cam->s_mutex); |
| 1221 | return ret; |
| 1222 | } |
| 1223 | |
| 1224 | static int mcam_vidioc_dqbuf(struct file *filp, void *priv, |
| 1225 | struct v4l2_buffer *buf) |
| 1226 | { |
| 1227 | struct mcam_camera *cam = filp->private_data; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1228 | int ret; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1229 | |
| 1230 | mutex_lock(&cam->s_mutex); |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1231 | ret = vb2_dqbuf(&cam->vb_queue, buf, filp->f_flags & O_NONBLOCK); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1232 | mutex_unlock(&cam->s_mutex); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1233 | return ret; |
| 1234 | } |
| 1235 | |
| 1236 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1237 | |
| 1238 | static int mcam_vidioc_queryctrl(struct file *filp, void *priv, |
| 1239 | struct v4l2_queryctrl *qc) |
| 1240 | { |
| 1241 | struct mcam_camera *cam = priv; |
| 1242 | int ret; |
| 1243 | |
| 1244 | mutex_lock(&cam->s_mutex); |
| 1245 | ret = sensor_call(cam, core, queryctrl, qc); |
| 1246 | mutex_unlock(&cam->s_mutex); |
| 1247 | return ret; |
| 1248 | } |
| 1249 | |
| 1250 | |
| 1251 | static int mcam_vidioc_g_ctrl(struct file *filp, void *priv, |
| 1252 | struct v4l2_control *ctrl) |
| 1253 | { |
| 1254 | struct mcam_camera *cam = priv; |
| 1255 | int ret; |
| 1256 | |
| 1257 | mutex_lock(&cam->s_mutex); |
| 1258 | ret = sensor_call(cam, core, g_ctrl, ctrl); |
| 1259 | mutex_unlock(&cam->s_mutex); |
| 1260 | return ret; |
| 1261 | } |
| 1262 | |
| 1263 | |
| 1264 | static int mcam_vidioc_s_ctrl(struct file *filp, void *priv, |
| 1265 | struct v4l2_control *ctrl) |
| 1266 | { |
| 1267 | struct mcam_camera *cam = priv; |
| 1268 | int ret; |
| 1269 | |
| 1270 | mutex_lock(&cam->s_mutex); |
| 1271 | ret = sensor_call(cam, core, s_ctrl, ctrl); |
| 1272 | mutex_unlock(&cam->s_mutex); |
| 1273 | return ret; |
| 1274 | } |
| 1275 | |
| 1276 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1277 | static int mcam_vidioc_querycap(struct file *file, void *priv, |
| 1278 | struct v4l2_capability *cap) |
| 1279 | { |
| 1280 | strcpy(cap->driver, "marvell_ccic"); |
| 1281 | strcpy(cap->card, "marvell_ccic"); |
| 1282 | cap->version = 1; |
| 1283 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | |
| 1284 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING; |
| 1285 | return 0; |
| 1286 | } |
| 1287 | |
| 1288 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1289 | static int mcam_vidioc_enum_fmt_vid_cap(struct file *filp, |
| 1290 | void *priv, struct v4l2_fmtdesc *fmt) |
| 1291 | { |
| 1292 | if (fmt->index >= N_MCAM_FMTS) |
| 1293 | return -EINVAL; |
| 1294 | strlcpy(fmt->description, mcam_formats[fmt->index].desc, |
| 1295 | sizeof(fmt->description)); |
| 1296 | fmt->pixelformat = mcam_formats[fmt->index].pixelformat; |
| 1297 | return 0; |
| 1298 | } |
| 1299 | |
| 1300 | static int mcam_vidioc_try_fmt_vid_cap(struct file *filp, void *priv, |
| 1301 | struct v4l2_format *fmt) |
| 1302 | { |
| 1303 | struct mcam_camera *cam = priv; |
| 1304 | struct mcam_format_struct *f; |
| 1305 | struct v4l2_pix_format *pix = &fmt->fmt.pix; |
| 1306 | struct v4l2_mbus_framefmt mbus_fmt; |
| 1307 | int ret; |
| 1308 | |
| 1309 | f = mcam_find_format(pix->pixelformat); |
| 1310 | pix->pixelformat = f->pixelformat; |
| 1311 | v4l2_fill_mbus_format(&mbus_fmt, pix, f->mbus_code); |
| 1312 | mutex_lock(&cam->s_mutex); |
| 1313 | ret = sensor_call(cam, video, try_mbus_fmt, &mbus_fmt); |
| 1314 | mutex_unlock(&cam->s_mutex); |
| 1315 | v4l2_fill_pix_format(pix, &mbus_fmt); |
| 1316 | pix->bytesperline = pix->width * f->bpp; |
| 1317 | pix->sizeimage = pix->height * pix->bytesperline; |
| 1318 | return ret; |
| 1319 | } |
| 1320 | |
| 1321 | static int mcam_vidioc_s_fmt_vid_cap(struct file *filp, void *priv, |
| 1322 | struct v4l2_format *fmt) |
| 1323 | { |
| 1324 | struct mcam_camera *cam = priv; |
| 1325 | struct mcam_format_struct *f; |
| 1326 | int ret; |
| 1327 | |
| 1328 | /* |
| 1329 | * Can't do anything if the device is not idle |
| 1330 | * Also can't if there are streaming buffers in place. |
| 1331 | */ |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1332 | if (cam->state != S_IDLE || cam->vb_queue.num_buffers > 0) |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1333 | return -EBUSY; |
| 1334 | |
| 1335 | f = mcam_find_format(fmt->fmt.pix.pixelformat); |
| 1336 | |
| 1337 | /* |
| 1338 | * See if the formatting works in principle. |
| 1339 | */ |
| 1340 | ret = mcam_vidioc_try_fmt_vid_cap(filp, priv, fmt); |
| 1341 | if (ret) |
| 1342 | return ret; |
| 1343 | /* |
| 1344 | * Now we start to change things for real, so let's do it |
| 1345 | * under lock. |
| 1346 | */ |
| 1347 | mutex_lock(&cam->s_mutex); |
| 1348 | cam->pix_format = fmt->fmt.pix; |
| 1349 | cam->mbus_code = f->mbus_code; |
| 1350 | |
| 1351 | /* |
| 1352 | * Make sure we have appropriate DMA buffers. |
| 1353 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1354 | if (cam->buffer_mode == B_vmalloc) { |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1355 | ret = mcam_check_dma_buffers(cam); |
| 1356 | if (ret) |
| 1357 | goto out; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1358 | } |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1359 | mcam_set_config_needed(cam, 1); |
| 1360 | ret = 0; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1361 | out: |
| 1362 | mutex_unlock(&cam->s_mutex); |
| 1363 | return ret; |
| 1364 | } |
| 1365 | |
| 1366 | /* |
| 1367 | * Return our stored notion of how the camera is/should be configured. |
| 1368 | * The V4l2 spec wants us to be smarter, and actually get this from |
| 1369 | * the camera (and not mess with it at open time). Someday. |
| 1370 | */ |
| 1371 | static int mcam_vidioc_g_fmt_vid_cap(struct file *filp, void *priv, |
| 1372 | struct v4l2_format *f) |
| 1373 | { |
| 1374 | struct mcam_camera *cam = priv; |
| 1375 | |
| 1376 | f->fmt.pix = cam->pix_format; |
| 1377 | return 0; |
| 1378 | } |
| 1379 | |
| 1380 | /* |
| 1381 | * We only have one input - the sensor - so minimize the nonsense here. |
| 1382 | */ |
| 1383 | static int mcam_vidioc_enum_input(struct file *filp, void *priv, |
| 1384 | struct v4l2_input *input) |
| 1385 | { |
| 1386 | if (input->index != 0) |
| 1387 | return -EINVAL; |
| 1388 | |
| 1389 | input->type = V4L2_INPUT_TYPE_CAMERA; |
| 1390 | input->std = V4L2_STD_ALL; /* Not sure what should go here */ |
| 1391 | strcpy(input->name, "Camera"); |
| 1392 | return 0; |
| 1393 | } |
| 1394 | |
| 1395 | static int mcam_vidioc_g_input(struct file *filp, void *priv, unsigned int *i) |
| 1396 | { |
| 1397 | *i = 0; |
| 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | static int mcam_vidioc_s_input(struct file *filp, void *priv, unsigned int i) |
| 1402 | { |
| 1403 | if (i != 0) |
| 1404 | return -EINVAL; |
| 1405 | return 0; |
| 1406 | } |
| 1407 | |
| 1408 | /* from vivi.c */ |
| 1409 | static int mcam_vidioc_s_std(struct file *filp, void *priv, v4l2_std_id *a) |
| 1410 | { |
| 1411 | return 0; |
| 1412 | } |
| 1413 | |
| 1414 | /* |
| 1415 | * G/S_PARM. Most of this is done by the sensor, but we are |
| 1416 | * the level which controls the number of read buffers. |
| 1417 | */ |
| 1418 | static int mcam_vidioc_g_parm(struct file *filp, void *priv, |
| 1419 | struct v4l2_streamparm *parms) |
| 1420 | { |
| 1421 | struct mcam_camera *cam = priv; |
| 1422 | int ret; |
| 1423 | |
| 1424 | mutex_lock(&cam->s_mutex); |
| 1425 | ret = sensor_call(cam, video, g_parm, parms); |
| 1426 | mutex_unlock(&cam->s_mutex); |
| 1427 | parms->parm.capture.readbuffers = n_dma_bufs; |
| 1428 | return ret; |
| 1429 | } |
| 1430 | |
| 1431 | static int mcam_vidioc_s_parm(struct file *filp, void *priv, |
| 1432 | struct v4l2_streamparm *parms) |
| 1433 | { |
| 1434 | struct mcam_camera *cam = priv; |
| 1435 | int ret; |
| 1436 | |
| 1437 | mutex_lock(&cam->s_mutex); |
| 1438 | ret = sensor_call(cam, video, s_parm, parms); |
| 1439 | mutex_unlock(&cam->s_mutex); |
| 1440 | parms->parm.capture.readbuffers = n_dma_bufs; |
| 1441 | return ret; |
| 1442 | } |
| 1443 | |
| 1444 | static int mcam_vidioc_g_chip_ident(struct file *file, void *priv, |
| 1445 | struct v4l2_dbg_chip_ident *chip) |
| 1446 | { |
| 1447 | struct mcam_camera *cam = priv; |
| 1448 | |
| 1449 | chip->ident = V4L2_IDENT_NONE; |
| 1450 | chip->revision = 0; |
| 1451 | if (v4l2_chip_match_host(&chip->match)) { |
| 1452 | chip->ident = cam->chip_id; |
| 1453 | return 0; |
| 1454 | } |
| 1455 | return sensor_call(cam, core, g_chip_ident, chip); |
| 1456 | } |
| 1457 | |
| 1458 | static int mcam_vidioc_enum_framesizes(struct file *filp, void *priv, |
| 1459 | struct v4l2_frmsizeenum *sizes) |
| 1460 | { |
| 1461 | struct mcam_camera *cam = priv; |
| 1462 | int ret; |
| 1463 | |
| 1464 | mutex_lock(&cam->s_mutex); |
| 1465 | ret = sensor_call(cam, video, enum_framesizes, sizes); |
| 1466 | mutex_unlock(&cam->s_mutex); |
| 1467 | return ret; |
| 1468 | } |
| 1469 | |
| 1470 | static int mcam_vidioc_enum_frameintervals(struct file *filp, void *priv, |
| 1471 | struct v4l2_frmivalenum *interval) |
| 1472 | { |
| 1473 | struct mcam_camera *cam = priv; |
| 1474 | int ret; |
| 1475 | |
| 1476 | mutex_lock(&cam->s_mutex); |
| 1477 | ret = sensor_call(cam, video, enum_frameintervals, interval); |
| 1478 | mutex_unlock(&cam->s_mutex); |
| 1479 | return ret; |
| 1480 | } |
| 1481 | |
| 1482 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1483 | static int mcam_vidioc_g_register(struct file *file, void *priv, |
| 1484 | struct v4l2_dbg_register *reg) |
| 1485 | { |
| 1486 | struct mcam_camera *cam = priv; |
| 1487 | |
| 1488 | if (v4l2_chip_match_host(®->match)) { |
| 1489 | reg->val = mcam_reg_read(cam, reg->reg); |
| 1490 | reg->size = 4; |
| 1491 | return 0; |
| 1492 | } |
| 1493 | return sensor_call(cam, core, g_register, reg); |
| 1494 | } |
| 1495 | |
| 1496 | static int mcam_vidioc_s_register(struct file *file, void *priv, |
| 1497 | struct v4l2_dbg_register *reg) |
| 1498 | { |
| 1499 | struct mcam_camera *cam = priv; |
| 1500 | |
| 1501 | if (v4l2_chip_match_host(®->match)) { |
| 1502 | mcam_reg_write(cam, reg->reg, reg->val); |
| 1503 | return 0; |
| 1504 | } |
| 1505 | return sensor_call(cam, core, s_register, reg); |
| 1506 | } |
| 1507 | #endif |
| 1508 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1509 | static const struct v4l2_ioctl_ops mcam_v4l_ioctl_ops = { |
| 1510 | .vidioc_querycap = mcam_vidioc_querycap, |
| 1511 | .vidioc_enum_fmt_vid_cap = mcam_vidioc_enum_fmt_vid_cap, |
| 1512 | .vidioc_try_fmt_vid_cap = mcam_vidioc_try_fmt_vid_cap, |
| 1513 | .vidioc_s_fmt_vid_cap = mcam_vidioc_s_fmt_vid_cap, |
| 1514 | .vidioc_g_fmt_vid_cap = mcam_vidioc_g_fmt_vid_cap, |
| 1515 | .vidioc_enum_input = mcam_vidioc_enum_input, |
| 1516 | .vidioc_g_input = mcam_vidioc_g_input, |
| 1517 | .vidioc_s_input = mcam_vidioc_s_input, |
| 1518 | .vidioc_s_std = mcam_vidioc_s_std, |
| 1519 | .vidioc_reqbufs = mcam_vidioc_reqbufs, |
| 1520 | .vidioc_querybuf = mcam_vidioc_querybuf, |
| 1521 | .vidioc_qbuf = mcam_vidioc_qbuf, |
| 1522 | .vidioc_dqbuf = mcam_vidioc_dqbuf, |
| 1523 | .vidioc_streamon = mcam_vidioc_streamon, |
| 1524 | .vidioc_streamoff = mcam_vidioc_streamoff, |
| 1525 | .vidioc_queryctrl = mcam_vidioc_queryctrl, |
| 1526 | .vidioc_g_ctrl = mcam_vidioc_g_ctrl, |
| 1527 | .vidioc_s_ctrl = mcam_vidioc_s_ctrl, |
| 1528 | .vidioc_g_parm = mcam_vidioc_g_parm, |
| 1529 | .vidioc_s_parm = mcam_vidioc_s_parm, |
| 1530 | .vidioc_enum_framesizes = mcam_vidioc_enum_framesizes, |
| 1531 | .vidioc_enum_frameintervals = mcam_vidioc_enum_frameintervals, |
| 1532 | .vidioc_g_chip_ident = mcam_vidioc_g_chip_ident, |
| 1533 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
| 1534 | .vidioc_g_register = mcam_vidioc_g_register, |
| 1535 | .vidioc_s_register = mcam_vidioc_s_register, |
| 1536 | #endif |
| 1537 | }; |
| 1538 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1539 | /* ---------------------------------------------------------------------- */ |
| 1540 | /* |
| 1541 | * Our various file operations. |
| 1542 | */ |
| 1543 | static int mcam_v4l_open(struct file *filp) |
| 1544 | { |
| 1545 | struct mcam_camera *cam = video_drvdata(filp); |
| 1546 | int ret = 0; |
| 1547 | |
| 1548 | filp->private_data = cam; |
| 1549 | |
| 1550 | frames = singles = delivered = 0; |
| 1551 | mutex_lock(&cam->s_mutex); |
| 1552 | if (cam->users == 0) { |
| 1553 | ret = mcam_setup_vb2(cam); |
| 1554 | if (ret) |
| 1555 | goto out; |
| 1556 | mcam_ctlr_power_up(cam); |
| 1557 | __mcam_cam_reset(cam); |
| 1558 | mcam_set_config_needed(cam, 1); |
| 1559 | } |
| 1560 | (cam->users)++; |
| 1561 | out: |
| 1562 | mutex_unlock(&cam->s_mutex); |
| 1563 | return ret; |
| 1564 | } |
| 1565 | |
| 1566 | |
| 1567 | static int mcam_v4l_release(struct file *filp) |
| 1568 | { |
| 1569 | struct mcam_camera *cam = filp->private_data; |
| 1570 | |
| 1571 | cam_err(cam, "Release, %d frames, %d singles, %d delivered\n", frames, |
| 1572 | singles, delivered); |
| 1573 | mutex_lock(&cam->s_mutex); |
| 1574 | (cam->users)--; |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1575 | if (cam->users == 0) { |
Jonathan Corbet | 0770d07 | 2012-03-16 19:14:51 -0300 | [diff] [blame] | 1576 | mcam_ctlr_stop_dma(cam); |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1577 | mcam_cleanup_vb2(cam); |
| 1578 | mcam_ctlr_power_down(cam); |
| 1579 | if (cam->buffer_mode == B_vmalloc && alloc_bufs_at_read) |
| 1580 | mcam_free_dma_bufs(cam); |
| 1581 | } |
| 1582 | mutex_unlock(&cam->s_mutex); |
| 1583 | return 0; |
| 1584 | } |
| 1585 | |
| 1586 | static ssize_t mcam_v4l_read(struct file *filp, |
| 1587 | char __user *buffer, size_t len, loff_t *pos) |
| 1588 | { |
| 1589 | struct mcam_camera *cam = filp->private_data; |
| 1590 | int ret; |
| 1591 | |
| 1592 | mutex_lock(&cam->s_mutex); |
| 1593 | ret = vb2_read(&cam->vb_queue, buffer, len, pos, |
| 1594 | filp->f_flags & O_NONBLOCK); |
| 1595 | mutex_unlock(&cam->s_mutex); |
| 1596 | return ret; |
| 1597 | } |
| 1598 | |
| 1599 | |
| 1600 | |
| 1601 | static unsigned int mcam_v4l_poll(struct file *filp, |
| 1602 | struct poll_table_struct *pt) |
| 1603 | { |
| 1604 | struct mcam_camera *cam = filp->private_data; |
| 1605 | int ret; |
| 1606 | |
| 1607 | mutex_lock(&cam->s_mutex); |
| 1608 | ret = vb2_poll(&cam->vb_queue, filp, pt); |
| 1609 | mutex_unlock(&cam->s_mutex); |
| 1610 | return ret; |
| 1611 | } |
| 1612 | |
| 1613 | |
| 1614 | static int mcam_v4l_mmap(struct file *filp, struct vm_area_struct *vma) |
| 1615 | { |
| 1616 | struct mcam_camera *cam = filp->private_data; |
| 1617 | int ret; |
| 1618 | |
| 1619 | mutex_lock(&cam->s_mutex); |
| 1620 | ret = vb2_mmap(&cam->vb_queue, vma); |
| 1621 | mutex_unlock(&cam->s_mutex); |
| 1622 | return ret; |
| 1623 | } |
| 1624 | |
| 1625 | |
| 1626 | |
| 1627 | static const struct v4l2_file_operations mcam_v4l_fops = { |
| 1628 | .owner = THIS_MODULE, |
| 1629 | .open = mcam_v4l_open, |
| 1630 | .release = mcam_v4l_release, |
| 1631 | .read = mcam_v4l_read, |
| 1632 | .poll = mcam_v4l_poll, |
| 1633 | .mmap = mcam_v4l_mmap, |
| 1634 | .unlocked_ioctl = video_ioctl2, |
| 1635 | }; |
| 1636 | |
| 1637 | |
| 1638 | /* |
| 1639 | * This template device holds all of those v4l2 methods; we |
| 1640 | * clone it for specific real devices. |
| 1641 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1642 | static struct video_device mcam_v4l_template = { |
| 1643 | .name = "mcam", |
| 1644 | .tvnorms = V4L2_STD_NTSC_M, |
| 1645 | .current_norm = V4L2_STD_NTSC_M, /* make mplayer happy */ |
| 1646 | |
| 1647 | .fops = &mcam_v4l_fops, |
| 1648 | .ioctl_ops = &mcam_v4l_ioctl_ops, |
| 1649 | .release = video_device_release_empty, |
| 1650 | }; |
| 1651 | |
| 1652 | /* ---------------------------------------------------------------------- */ |
| 1653 | /* |
| 1654 | * Interrupt handler stuff |
| 1655 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1656 | static void mcam_frame_complete(struct mcam_camera *cam, int frame) |
| 1657 | { |
| 1658 | /* |
| 1659 | * Basic frame housekeeping. |
| 1660 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1661 | set_bit(frame, &cam->flags); |
| 1662 | clear_bit(CF_DMA_ACTIVE, &cam->flags); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1663 | cam->next_buf = frame; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1664 | cam->buf_seq[frame] = ++(cam->sequence); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1665 | frames++; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1666 | /* |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1667 | * "This should never happen" |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1668 | */ |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1669 | if (cam->state != S_STREAMING) |
| 1670 | return; |
| 1671 | /* |
| 1672 | * Process the frame and set up the next one. |
| 1673 | */ |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1674 | cam->frame_complete(cam, frame); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1675 | } |
| 1676 | |
| 1677 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1678 | /* |
| 1679 | * The interrupt handler; this needs to be called from the |
| 1680 | * platform irq handler with the lock held. |
| 1681 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1682 | int mccic_irq(struct mcam_camera *cam, unsigned int irqs) |
| 1683 | { |
| 1684 | unsigned int frame, handled = 0; |
| 1685 | |
| 1686 | mcam_reg_write(cam, REG_IRQSTAT, FRAMEIRQS); /* Clear'em all */ |
| 1687 | /* |
| 1688 | * Handle any frame completions. There really should |
| 1689 | * not be more than one of these, or we have fallen |
| 1690 | * far behind. |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1691 | * |
| 1692 | * When running in S/G mode, the frame number lacks any |
| 1693 | * real meaning - there's only one descriptor array - but |
| 1694 | * the controller still picks a different one to signal |
| 1695 | * each time. |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1696 | */ |
| 1697 | for (frame = 0; frame < cam->nbufs; frame++) |
| 1698 | if (irqs & (IRQ_EOF0 << frame)) { |
| 1699 | mcam_frame_complete(cam, frame); |
| 1700 | handled = 1; |
| 1701 | } |
| 1702 | /* |
| 1703 | * If a frame starts, note that we have DMA active. This |
| 1704 | * code assumes that we won't get multiple frame interrupts |
| 1705 | * at once; may want to rethink that. |
| 1706 | */ |
| 1707 | if (irqs & (IRQ_SOF0 | IRQ_SOF1 | IRQ_SOF2)) { |
| 1708 | set_bit(CF_DMA_ACTIVE, &cam->flags); |
| 1709 | handled = 1; |
Jonathan Corbet | cbc4f3a | 2011-06-30 17:05:27 -0300 | [diff] [blame] | 1710 | if (cam->buffer_mode == B_DMA_sg) |
| 1711 | mcam_ctlr_stop(cam); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1712 | } |
| 1713 | return handled; |
| 1714 | } |
| 1715 | |
Jonathan Corbet | d43dae7 | 2011-07-08 17:50:46 -0300 | [diff] [blame] | 1716 | /* ---------------------------------------------------------------------- */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1717 | /* |
| 1718 | * Registration and such. |
| 1719 | */ |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1720 | static struct ov7670_config sensor_cfg = { |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1721 | /* |
| 1722 | * Exclude QCIF mode, because it only captures a tiny portion |
| 1723 | * of the sensor FOV |
| 1724 | */ |
| 1725 | .min_width = 320, |
| 1726 | .min_height = 240, |
| 1727 | }; |
| 1728 | |
| 1729 | |
| 1730 | int mccic_register(struct mcam_camera *cam) |
| 1731 | { |
| 1732 | struct i2c_board_info ov7670_info = { |
| 1733 | .type = "ov7670", |
Jonathan Corbet | 1c68f88 | 2011-06-11 14:46:47 -0300 | [diff] [blame] | 1734 | .addr = 0x42 >> 1, |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1735 | .platform_data = &sensor_cfg, |
| 1736 | }; |
| 1737 | int ret; |
| 1738 | |
| 1739 | /* |
Jonathan Corbet | 7498469 | 2011-07-08 17:50:49 -0300 | [diff] [blame] | 1740 | * Validate the requested buffer mode. |
| 1741 | */ |
| 1742 | if (buffer_mode >= 0) |
| 1743 | cam->buffer_mode = buffer_mode; |
| 1744 | if (cam->buffer_mode == B_DMA_sg && |
| 1745 | cam->chip_id == V4L2_IDENT_CAFE) { |
| 1746 | printk(KERN_ERR "marvell-cam: Cafe can't do S/G I/O, " |
| 1747 | "attempting vmalloc mode instead\n"); |
| 1748 | cam->buffer_mode = B_vmalloc; |
| 1749 | } |
| 1750 | if (!mcam_buffer_mode_supported(cam->buffer_mode)) { |
| 1751 | printk(KERN_ERR "marvell-cam: buffer mode %d unsupported\n", |
| 1752 | cam->buffer_mode); |
| 1753 | return -EINVAL; |
| 1754 | } |
| 1755 | /* |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1756 | * Register with V4L |
| 1757 | */ |
| 1758 | ret = v4l2_device_register(cam->dev, &cam->v4l2_dev); |
| 1759 | if (ret) |
| 1760 | return ret; |
| 1761 | |
| 1762 | mutex_init(&cam->s_mutex); |
| 1763 | cam->state = S_NOTREADY; |
| 1764 | mcam_set_config_needed(cam, 1); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1765 | cam->pix_format = mcam_def_pix_format; |
| 1766 | cam->mbus_code = mcam_def_mbus_code; |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1767 | INIT_LIST_HEAD(&cam->buffers); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1768 | mcam_ctlr_init(cam); |
| 1769 | |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1770 | /* |
| 1771 | * Try to find the sensor. |
| 1772 | */ |
Jonathan Corbet | 2164b5a | 2011-06-11 14:46:44 -0300 | [diff] [blame] | 1773 | sensor_cfg.clock_speed = cam->clock_speed; |
| 1774 | sensor_cfg.use_smbus = cam->use_smbus; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1775 | cam->sensor_addr = ov7670_info.addr; |
| 1776 | cam->sensor = v4l2_i2c_new_subdev_board(&cam->v4l2_dev, |
Jonathan Corbet | 595a93a | 2011-06-11 14:46:48 -0300 | [diff] [blame] | 1777 | cam->i2c_adapter, &ov7670_info, NULL); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1778 | if (cam->sensor == NULL) { |
| 1779 | ret = -ENODEV; |
| 1780 | goto out_unregister; |
| 1781 | } |
| 1782 | |
| 1783 | ret = mcam_cam_init(cam); |
| 1784 | if (ret) |
| 1785 | goto out_unregister; |
| 1786 | /* |
| 1787 | * Get the v4l2 setup done. |
| 1788 | */ |
| 1789 | mutex_lock(&cam->s_mutex); |
| 1790 | cam->vdev = mcam_v4l_template; |
| 1791 | cam->vdev.debug = 0; |
| 1792 | cam->vdev.v4l2_dev = &cam->v4l2_dev; |
| 1793 | ret = video_register_device(&cam->vdev, VFL_TYPE_GRABBER, -1); |
| 1794 | if (ret) |
| 1795 | goto out; |
| 1796 | video_set_drvdata(&cam->vdev, cam); |
| 1797 | |
| 1798 | /* |
| 1799 | * If so requested, try to get our DMA buffers now. |
| 1800 | */ |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1801 | if (cam->buffer_mode == B_vmalloc && !alloc_bufs_at_read) { |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1802 | if (mcam_alloc_dma_bufs(cam, 1)) |
| 1803 | cam_warn(cam, "Unable to alloc DMA buffers at load" |
| 1804 | " will try again later."); |
| 1805 | } |
| 1806 | |
| 1807 | out: |
| 1808 | mutex_unlock(&cam->s_mutex); |
| 1809 | return ret; |
| 1810 | out_unregister: |
| 1811 | v4l2_device_unregister(&cam->v4l2_dev); |
| 1812 | return ret; |
| 1813 | } |
| 1814 | |
| 1815 | |
| 1816 | void mccic_shutdown(struct mcam_camera *cam) |
| 1817 | { |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 1818 | /* |
| 1819 | * If we have no users (and we really, really should have no |
| 1820 | * users) the device will already be powered down. Trying to |
| 1821 | * take it down again will wedge the machine, which is frowned |
| 1822 | * upon. |
| 1823 | */ |
| 1824 | if (cam->users > 0) { |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1825 | cam_warn(cam, "Removing a device with users!\n"); |
Jonathan Corbet | 67a8dbb | 2011-06-11 14:46:49 -0300 | [diff] [blame] | 1826 | mcam_ctlr_power_down(cam); |
| 1827 | } |
Jonathan Corbet | b5210fd | 2011-06-20 16:14:36 -0300 | [diff] [blame] | 1828 | vb2_queue_release(&cam->vb_queue); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1829 | if (cam->buffer_mode == B_vmalloc) |
| 1830 | mcam_free_dma_bufs(cam); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1831 | video_unregister_device(&cam->vdev); |
| 1832 | v4l2_device_unregister(&cam->v4l2_dev); |
| 1833 | } |
| 1834 | |
| 1835 | /* |
| 1836 | * Power management |
| 1837 | */ |
| 1838 | #ifdef CONFIG_PM |
| 1839 | |
| 1840 | void mccic_suspend(struct mcam_camera *cam) |
| 1841 | { |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 1842 | mutex_lock(&cam->s_mutex); |
| 1843 | if (cam->users > 0) { |
| 1844 | enum mcam_state cstate = cam->state; |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1845 | |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 1846 | mcam_ctlr_stop_dma(cam); |
| 1847 | mcam_ctlr_power_down(cam); |
| 1848 | cam->state = cstate; |
| 1849 | } |
| 1850 | mutex_unlock(&cam->s_mutex); |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1851 | } |
| 1852 | |
| 1853 | int mccic_resume(struct mcam_camera *cam) |
| 1854 | { |
| 1855 | int ret = 0; |
| 1856 | |
| 1857 | mutex_lock(&cam->s_mutex); |
| 1858 | if (cam->users > 0) { |
| 1859 | mcam_ctlr_power_up(cam); |
| 1860 | __mcam_cam_reset(cam); |
| 1861 | } else { |
| 1862 | mcam_ctlr_power_down(cam); |
| 1863 | } |
| 1864 | mutex_unlock(&cam->s_mutex); |
| 1865 | |
| 1866 | set_bit(CF_CONFIG_NEEDED, &cam->flags); |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 1867 | if (cam->state == S_STREAMING) { |
| 1868 | /* |
| 1869 | * If there was a buffer in the DMA engine at suspend |
| 1870 | * time, put it back on the queue or we'll forget about it. |
| 1871 | */ |
| 1872 | if (cam->buffer_mode == B_DMA_sg && cam->vb_bufs[0]) |
| 1873 | list_add(&cam->vb_bufs[0]->queue, &cam->buffers); |
Jonathan Corbet | a9b36e8 | 2011-06-20 16:14:40 -0300 | [diff] [blame] | 1874 | ret = mcam_read_setup(cam); |
Jonathan Corbet | bb0a896 | 2011-12-30 14:13:41 -0300 | [diff] [blame] | 1875 | } |
Jonathan Corbet | abfa3df | 2011-06-11 14:46:43 -0300 | [diff] [blame] | 1876 | return ret; |
| 1877 | } |
| 1878 | #endif /* CONFIG_PM */ |