Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1 | /* |
| 2 | * V4L2 Driver for PXA camera host |
| 3 | * |
| 4 | * Copyright (C) 2006, Sascha Hauer, Pengutronix |
| 5 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 13 | #include <linux/init.h> |
| 14 | #include <linux/module.h> |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 15 | #include <linux/io.h> |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 16 | #include <linux/delay.h> |
| 17 | #include <linux/dma-mapping.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/fs.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/kernel.h> |
| 22 | #include <linux/mm.h> |
| 23 | #include <linux/moduleparam.h> |
| 24 | #include <linux/time.h> |
| 25 | #include <linux/version.h> |
| 26 | #include <linux/device.h> |
| 27 | #include <linux/platform_device.h> |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 28 | #include <linux/clk.h> |
| 29 | |
| 30 | #include <media/v4l2-common.h> |
| 31 | #include <media/v4l2-dev.h> |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 32 | #include <media/videobuf-dma-sg.h> |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 33 | #include <media/soc_camera.h> |
| 34 | |
| 35 | #include <linux/videodev2.h> |
| 36 | |
Eric Miao | cfbaf4d | 2009-01-02 12:16:02 -0300 | [diff] [blame] | 37 | #include <mach/dma.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 38 | #include <mach/camera.h> |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 39 | |
| 40 | #define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5) |
| 41 | #define PXA_CAM_DRV_NAME "pxa27x-camera" |
| 42 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 43 | /* Camera Interface */ |
| 44 | #define CICR0 0x0000 |
| 45 | #define CICR1 0x0004 |
| 46 | #define CICR2 0x0008 |
| 47 | #define CICR3 0x000C |
| 48 | #define CICR4 0x0010 |
| 49 | #define CISR 0x0014 |
| 50 | #define CIFR 0x0018 |
| 51 | #define CITOR 0x001C |
| 52 | #define CIBR0 0x0028 |
| 53 | #define CIBR1 0x0030 |
| 54 | #define CIBR2 0x0038 |
| 55 | |
| 56 | #define CICR0_DMAEN (1 << 31) /* DMA request enable */ |
| 57 | #define CICR0_PAR_EN (1 << 30) /* Parity enable */ |
| 58 | #define CICR0_SL_CAP_EN (1 << 29) /* Capture enable for slave mode */ |
| 59 | #define CICR0_ENB (1 << 28) /* Camera interface enable */ |
| 60 | #define CICR0_DIS (1 << 27) /* Camera interface disable */ |
| 61 | #define CICR0_SIM (0x7 << 24) /* Sensor interface mode mask */ |
| 62 | #define CICR0_TOM (1 << 9) /* Time-out mask */ |
| 63 | #define CICR0_RDAVM (1 << 8) /* Receive-data-available mask */ |
| 64 | #define CICR0_FEM (1 << 7) /* FIFO-empty mask */ |
| 65 | #define CICR0_EOLM (1 << 6) /* End-of-line mask */ |
| 66 | #define CICR0_PERRM (1 << 5) /* Parity-error mask */ |
| 67 | #define CICR0_QDM (1 << 4) /* Quick-disable mask */ |
| 68 | #define CICR0_CDM (1 << 3) /* Disable-done mask */ |
| 69 | #define CICR0_SOFM (1 << 2) /* Start-of-frame mask */ |
| 70 | #define CICR0_EOFM (1 << 1) /* End-of-frame mask */ |
| 71 | #define CICR0_FOM (1 << 0) /* FIFO-overrun mask */ |
| 72 | |
| 73 | #define CICR1_TBIT (1 << 31) /* Transparency bit */ |
| 74 | #define CICR1_RGBT_CONV (0x3 << 29) /* RGBT conversion mask */ |
| 75 | #define CICR1_PPL (0x7ff << 15) /* Pixels per line mask */ |
| 76 | #define CICR1_RGB_CONV (0x7 << 12) /* RGB conversion mask */ |
| 77 | #define CICR1_RGB_F (1 << 11) /* RGB format */ |
| 78 | #define CICR1_YCBCR_F (1 << 10) /* YCbCr format */ |
| 79 | #define CICR1_RGB_BPP (0x7 << 7) /* RGB bis per pixel mask */ |
| 80 | #define CICR1_RAW_BPP (0x3 << 5) /* Raw bis per pixel mask */ |
| 81 | #define CICR1_COLOR_SP (0x3 << 3) /* Color space mask */ |
| 82 | #define CICR1_DW (0x7 << 0) /* Data width mask */ |
| 83 | |
| 84 | #define CICR2_BLW (0xff << 24) /* Beginning-of-line pixel clock |
| 85 | wait count mask */ |
| 86 | #define CICR2_ELW (0xff << 16) /* End-of-line pixel clock |
| 87 | wait count mask */ |
| 88 | #define CICR2_HSW (0x3f << 10) /* Horizontal sync pulse width mask */ |
| 89 | #define CICR2_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock |
| 90 | wait count mask */ |
| 91 | #define CICR2_FSW (0x7 << 0) /* Frame stabilization |
| 92 | wait count mask */ |
| 93 | |
| 94 | #define CICR3_BFW (0xff << 24) /* Beginning-of-frame line clock |
| 95 | wait count mask */ |
| 96 | #define CICR3_EFW (0xff << 16) /* End-of-frame line clock |
| 97 | wait count mask */ |
| 98 | #define CICR3_VSW (0x3f << 10) /* Vertical sync pulse width mask */ |
| 99 | #define CICR3_BFPW (0x3f << 3) /* Beginning-of-frame pixel clock |
| 100 | wait count mask */ |
| 101 | #define CICR3_LPF (0x7ff << 0) /* Lines per frame mask */ |
| 102 | |
| 103 | #define CICR4_MCLK_DLY (0x3 << 24) /* MCLK Data Capture Delay mask */ |
| 104 | #define CICR4_PCLK_EN (1 << 23) /* Pixel clock enable */ |
| 105 | #define CICR4_PCP (1 << 22) /* Pixel clock polarity */ |
| 106 | #define CICR4_HSP (1 << 21) /* Horizontal sync polarity */ |
| 107 | #define CICR4_VSP (1 << 20) /* Vertical sync polarity */ |
| 108 | #define CICR4_MCLK_EN (1 << 19) /* MCLK enable */ |
| 109 | #define CICR4_FR_RATE (0x7 << 8) /* Frame rate mask */ |
| 110 | #define CICR4_DIV (0xff << 0) /* Clock divisor mask */ |
| 111 | |
| 112 | #define CISR_FTO (1 << 15) /* FIFO time-out */ |
| 113 | #define CISR_RDAV_2 (1 << 14) /* Channel 2 receive data available */ |
| 114 | #define CISR_RDAV_1 (1 << 13) /* Channel 1 receive data available */ |
| 115 | #define CISR_RDAV_0 (1 << 12) /* Channel 0 receive data available */ |
| 116 | #define CISR_FEMPTY_2 (1 << 11) /* Channel 2 FIFO empty */ |
| 117 | #define CISR_FEMPTY_1 (1 << 10) /* Channel 1 FIFO empty */ |
| 118 | #define CISR_FEMPTY_0 (1 << 9) /* Channel 0 FIFO empty */ |
| 119 | #define CISR_EOL (1 << 8) /* End of line */ |
| 120 | #define CISR_PAR_ERR (1 << 7) /* Parity error */ |
| 121 | #define CISR_CQD (1 << 6) /* Camera interface quick disable */ |
| 122 | #define CISR_CDD (1 << 5) /* Camera interface disable done */ |
| 123 | #define CISR_SOF (1 << 4) /* Start of frame */ |
| 124 | #define CISR_EOF (1 << 3) /* End of frame */ |
| 125 | #define CISR_IFO_2 (1 << 2) /* FIFO overrun for Channel 2 */ |
| 126 | #define CISR_IFO_1 (1 << 1) /* FIFO overrun for Channel 1 */ |
| 127 | #define CISR_IFO_0 (1 << 0) /* FIFO overrun for Channel 0 */ |
| 128 | |
| 129 | #define CIFR_FLVL2 (0x7f << 23) /* FIFO 2 level mask */ |
| 130 | #define CIFR_FLVL1 (0x7f << 16) /* FIFO 1 level mask */ |
| 131 | #define CIFR_FLVL0 (0xff << 8) /* FIFO 0 level mask */ |
| 132 | #define CIFR_THL_0 (0x3 << 4) /* Threshold Level for Channel 0 FIFO */ |
| 133 | #define CIFR_RESET_F (1 << 3) /* Reset input FIFOs */ |
| 134 | #define CIFR_FEN2 (1 << 2) /* FIFO enable for channel 2 */ |
| 135 | #define CIFR_FEN1 (1 << 1) /* FIFO enable for channel 1 */ |
| 136 | #define CIFR_FEN0 (1 << 0) /* FIFO enable for channel 0 */ |
| 137 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 138 | #define CICR0_SIM_MP (0 << 24) |
| 139 | #define CICR0_SIM_SP (1 << 24) |
| 140 | #define CICR0_SIM_MS (2 << 24) |
| 141 | #define CICR0_SIM_EP (3 << 24) |
| 142 | #define CICR0_SIM_ES (4 << 24) |
| 143 | |
| 144 | #define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */ |
| 145 | #define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 146 | #define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */ |
| 147 | #define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */ |
| 148 | #define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 149 | |
| 150 | #define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */ |
| 151 | #define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */ |
| 152 | #define CICR2_HSW_VAL(x) (((x) << 10) & CICR2_HSW) /* Horizontal sync pulse width */ |
| 153 | #define CICR2_BFPW_VAL(x) (((x) << 3) & CICR2_BFPW) /* Beginning-of-frame pixel clock wait count */ |
| 154 | #define CICR2_FSW_VAL(x) (((x) << 0) & CICR2_FSW) /* Frame stabilization wait count */ |
| 155 | |
| 156 | #define CICR3_BFW_VAL(x) (((x) << 24) & CICR3_BFW) /* Beginning-of-frame line clock wait count */ |
| 157 | #define CICR3_EFW_VAL(x) (((x) << 16) & CICR3_EFW) /* End-of-frame line clock wait count */ |
| 158 | #define CICR3_VSW_VAL(x) (((x) << 11) & CICR3_VSW) /* Vertical sync pulse width */ |
| 159 | #define CICR3_LPF_VAL(x) (((x) << 0) & CICR3_LPF) /* Lines per frame */ |
| 160 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 161 | #define CICR0_IRQ_MASK (CICR0_TOM | CICR0_RDAVM | CICR0_FEM | CICR0_EOLM | \ |
| 162 | CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \ |
| 163 | CICR0_EOFM | CICR0_FOM) |
| 164 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 165 | /* |
Robert Jarzmik | 92a8337 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 166 | * YUV422P picture size should be a multiple of 16, so the heuristic aligns |
| 167 | * height, width on 4 byte boundaries to reach the 16 multiple for the size. |
| 168 | */ |
| 169 | #define YUV422P_X_Y_ALIGN 4 |
| 170 | #define YUV422P_SIZE_ALIGN YUV422P_X_Y_ALIGN * YUV422P_X_Y_ALIGN |
| 171 | |
| 172 | /* |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 173 | * Structures |
| 174 | */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 175 | enum pxa_camera_active_dma { |
| 176 | DMA_Y = 0x1, |
| 177 | DMA_U = 0x2, |
| 178 | DMA_V = 0x4, |
| 179 | }; |
| 180 | |
| 181 | /* descriptor needed for the PXA DMA engine */ |
| 182 | struct pxa_cam_dma { |
| 183 | dma_addr_t sg_dma; |
| 184 | struct pxa_dma_desc *sg_cpu; |
| 185 | size_t sg_size; |
| 186 | int sglen; |
| 187 | }; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 188 | |
| 189 | /* buffer for one video frame */ |
| 190 | struct pxa_buffer { |
| 191 | /* common v4l buffer stuff -- must be first */ |
| 192 | struct videobuf_buffer vb; |
| 193 | |
| 194 | const struct soc_camera_data_format *fmt; |
| 195 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 196 | /* our descriptor lists for Y, U and V channels */ |
| 197 | struct pxa_cam_dma dmas[3]; |
| 198 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 199 | int inwork; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 200 | |
| 201 | enum pxa_camera_active_dma active_dma; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 202 | }; |
| 203 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 204 | struct pxa_camera_dev { |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 205 | struct soc_camera_host soc_host; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 206 | struct device *dev; |
| 207 | /* PXA27x is only supposed to handle one camera on its Quick Capture |
| 208 | * interface. If anyone ever builds hardware to enable more than |
| 209 | * one camera, they will have to modify this driver too */ |
| 210 | struct soc_camera_device *icd; |
| 211 | struct clk *clk; |
| 212 | |
| 213 | unsigned int irq; |
| 214 | void __iomem *base; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 215 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 216 | int channels; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 217 | unsigned int dma_chans[3]; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 218 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 219 | struct pxacamera_platform_data *pdata; |
| 220 | struct resource *res; |
| 221 | unsigned long platform_flags; |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 222 | unsigned long ciclk; |
| 223 | unsigned long mclk; |
| 224 | u32 mclk_divisor; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 225 | |
| 226 | struct list_head capture; |
| 227 | |
| 228 | spinlock_t lock; |
| 229 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 230 | struct pxa_buffer *active; |
Guennadi Liakhovetski | 5aa2110 | 2008-04-22 10:40:23 -0300 | [diff] [blame] | 231 | struct pxa_dma_desc *sg_tail[3]; |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 232 | |
| 233 | u32 save_cicr[5]; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 234 | }; |
| 235 | |
| 236 | static const char *pxa_cam_driver_description = "PXA_Camera"; |
| 237 | |
| 238 | static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ |
| 239 | |
| 240 | /* |
| 241 | * Videobuf operations |
| 242 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 243 | static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, |
| 244 | unsigned int *size) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 245 | { |
| 246 | struct soc_camera_device *icd = vq->priv_data; |
| 247 | |
| 248 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); |
| 249 | |
Robert Jarzmik | 92a8337 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 250 | *size = roundup(icd->width * icd->height * |
| 251 | ((icd->current_fmt->depth + 7) >> 3), 8); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 252 | |
| 253 | if (0 == *count) |
| 254 | *count = 32; |
| 255 | while (*size * *count > vid_limit * 1024 * 1024) |
| 256 | (*count)--; |
| 257 | |
| 258 | return 0; |
| 259 | } |
| 260 | |
| 261 | static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf) |
| 262 | { |
| 263 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 264 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 265 | struct pxa_camera_dev *pcdev = ici->priv; |
| 266 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 267 | int i; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 268 | |
| 269 | BUG_ON(in_interrupt()); |
| 270 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 271 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 272 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
| 273 | |
| 274 | /* This waits until this buffer is out of danger, i.e., until it is no |
| 275 | * longer in STATE_QUEUED or STATE_ACTIVE */ |
| 276 | videobuf_waiton(&buf->vb, 0, 0); |
| 277 | videobuf_dma_unmap(vq, dma); |
| 278 | videobuf_dma_free(dma); |
| 279 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 280 | for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { |
| 281 | if (buf->dmas[i].sg_cpu) |
| 282 | dma_free_coherent(pcdev->dev, buf->dmas[i].sg_size, |
| 283 | buf->dmas[i].sg_cpu, |
| 284 | buf->dmas[i].sg_dma); |
| 285 | buf->dmas[i].sg_cpu = NULL; |
| 286 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 287 | |
| 288 | buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| 289 | } |
| 290 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 291 | static int calculate_dma_sglen(struct scatterlist *sglist, int sglen, |
| 292 | int sg_first_ofs, int size) |
| 293 | { |
| 294 | int i, offset, dma_len, xfer_len; |
| 295 | struct scatterlist *sg; |
| 296 | |
| 297 | offset = sg_first_ofs; |
| 298 | for_each_sg(sglist, sg, sglen, i) { |
| 299 | dma_len = sg_dma_len(sg); |
| 300 | |
| 301 | /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ |
| 302 | xfer_len = roundup(min(dma_len - offset, size), 8); |
| 303 | |
| 304 | size = max(0, size - xfer_len); |
| 305 | offset = 0; |
| 306 | if (size == 0) |
| 307 | break; |
| 308 | } |
| 309 | |
| 310 | BUG_ON(size != 0); |
| 311 | return i + 1; |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * pxa_init_dma_channel - init dma descriptors |
| 316 | * @pcdev: pxa camera device |
| 317 | * @buf: pxa buffer to find pxa dma channel |
| 318 | * @dma: dma video buffer |
| 319 | * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V') |
| 320 | * @cibr: camera Receive Buffer Register |
| 321 | * @size: bytes to transfer |
| 322 | * @sg_first: first element of sg_list |
| 323 | * @sg_first_ofs: offset in first element of sg_list |
| 324 | * |
| 325 | * Prepares the pxa dma descriptors to transfer one camera channel. |
| 326 | * Beware sg_first and sg_first_ofs are both input and output parameters. |
| 327 | * |
| 328 | * Returns 0 or -ENOMEM if no coherent memory is available |
| 329 | */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 330 | static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev, |
| 331 | struct pxa_buffer *buf, |
| 332 | struct videobuf_dmabuf *dma, int channel, |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 333 | int cibr, int size, |
| 334 | struct scatterlist **sg_first, int *sg_first_ofs) |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 335 | { |
| 336 | struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 337 | struct scatterlist *sg; |
| 338 | int i, offset, sglen; |
| 339 | int dma_len = 0, xfer_len = 0; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 340 | |
| 341 | if (pxa_dma->sg_cpu) |
| 342 | dma_free_coherent(pcdev->dev, pxa_dma->sg_size, |
| 343 | pxa_dma->sg_cpu, pxa_dma->sg_dma); |
| 344 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 345 | sglen = calculate_dma_sglen(*sg_first, dma->sglen, |
| 346 | *sg_first_ofs, size); |
| 347 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 348 | pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); |
| 349 | pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size, |
| 350 | &pxa_dma->sg_dma, GFP_KERNEL); |
| 351 | if (!pxa_dma->sg_cpu) |
| 352 | return -ENOMEM; |
| 353 | |
| 354 | pxa_dma->sglen = sglen; |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 355 | offset = *sg_first_ofs; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 356 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 357 | dev_dbg(pcdev->dev, "DMA: sg_first=%p, sglen=%d, ofs=%d, dma.desc=%x\n", |
| 358 | *sg_first, sglen, *sg_first_ofs, pxa_dma->sg_dma); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 359 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 360 | |
| 361 | for_each_sg(*sg_first, sg, sglen, i) { |
| 362 | dma_len = sg_dma_len(sg); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 363 | |
| 364 | /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 365 | xfer_len = roundup(min(dma_len - offset, size), 8); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 366 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 367 | size = max(0, size - xfer_len); |
| 368 | |
| 369 | pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; |
| 370 | pxa_dma->sg_cpu[i].dtadr = sg_dma_address(sg) + offset; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 371 | pxa_dma->sg_cpu[i].dcmd = |
| 372 | DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 373 | #ifdef DEBUG |
| 374 | if (!i) |
| 375 | pxa_dma->sg_cpu[i].dcmd |= DCMD_STARTIRQEN; |
| 376 | #endif |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 377 | pxa_dma->sg_cpu[i].ddadr = |
| 378 | pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 379 | |
| 380 | dev_vdbg(pcdev->dev, "DMA: desc.%08x->@phys=0x%08x, len=%d\n", |
| 381 | pxa_dma->sg_dma + i * sizeof(struct pxa_dma_desc), |
| 382 | sg_dma_address(sg) + offset, xfer_len); |
| 383 | offset = 0; |
| 384 | |
| 385 | if (size == 0) |
| 386 | break; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 387 | } |
| 388 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 389 | pxa_dma->sg_cpu[sglen].ddadr = DDADR_STOP; |
| 390 | pxa_dma->sg_cpu[sglen].dcmd = DCMD_FLOWSRC | DCMD_BURST8 | DCMD_ENDIRQEN; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 391 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 392 | /* |
| 393 | * Handle 1 special case : |
| 394 | * - in 3 planes (YUV422P format), we might finish with xfer_len equal |
| 395 | * to dma_len (end on PAGE boundary). In this case, the sg element |
| 396 | * for next plane should be the next after the last used to store the |
| 397 | * last scatter gather RAM page |
| 398 | */ |
| 399 | if (xfer_len >= dma_len) { |
| 400 | *sg_first_ofs = xfer_len - dma_len; |
| 401 | *sg_first = sg_next(sg); |
| 402 | } else { |
| 403 | *sg_first_ofs = xfer_len; |
| 404 | *sg_first = sg; |
| 405 | } |
| 406 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 407 | return 0; |
| 408 | } |
| 409 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 410 | static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev, |
| 411 | struct pxa_buffer *buf) |
| 412 | { |
| 413 | buf->active_dma = DMA_Y; |
| 414 | if (pcdev->channels == 3) |
| 415 | buf->active_dma |= DMA_U | DMA_V; |
| 416 | } |
| 417 | |
| 418 | /* |
| 419 | * Please check the DMA prepared buffer structure in : |
| 420 | * Documentation/video4linux/pxa_camera.txt |
| 421 | * Please check also in pxa_camera_check_link_miss() to understand why DMA chain |
| 422 | * modification while DMA chain is running will work anyway. |
| 423 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 424 | static int pxa_videobuf_prepare(struct videobuf_queue *vq, |
| 425 | struct videobuf_buffer *vb, enum v4l2_field field) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 426 | { |
| 427 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 428 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 429 | struct pxa_camera_dev *pcdev = ici->priv; |
| 430 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 431 | int ret; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 432 | int size_y, size_u = 0, size_v = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 433 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 434 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 435 | vb, vb->baddr, vb->bsize); |
| 436 | |
| 437 | /* Added list head initialization on alloc */ |
| 438 | WARN_ON(!list_empty(&vb->queue)); |
| 439 | |
| 440 | #ifdef DEBUG |
| 441 | /* This can be useful if you want to see if we actually fill |
| 442 | * the buffer with something */ |
| 443 | memset((void *)vb->baddr, 0xaa, vb->bsize); |
| 444 | #endif |
| 445 | |
| 446 | BUG_ON(NULL == icd->current_fmt); |
| 447 | |
| 448 | /* I think, in buf_prepare you only have to protect global data, |
| 449 | * the actual buffer is yours */ |
| 450 | buf->inwork = 1; |
| 451 | |
| 452 | if (buf->fmt != icd->current_fmt || |
| 453 | vb->width != icd->width || |
| 454 | vb->height != icd->height || |
| 455 | vb->field != field) { |
| 456 | buf->fmt = icd->current_fmt; |
| 457 | vb->width = icd->width; |
| 458 | vb->height = icd->height; |
| 459 | vb->field = field; |
| 460 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 461 | } |
| 462 | |
| 463 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); |
| 464 | if (0 != vb->baddr && vb->bsize < vb->size) { |
| 465 | ret = -EINVAL; |
| 466 | goto out; |
| 467 | } |
| 468 | |
| 469 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 470 | int size = vb->size; |
| 471 | int next_ofs = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 472 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 473 | struct scatterlist *sg; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 474 | |
| 475 | ret = videobuf_iolock(vq, vb, NULL); |
| 476 | if (ret) |
| 477 | goto fail; |
| 478 | |
Guennadi Liakhovetski | 5aa2110 | 2008-04-22 10:40:23 -0300 | [diff] [blame] | 479 | if (pcdev->channels == 3) { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 480 | size_y = size / 2; |
| 481 | size_u = size_v = size / 4; |
| 482 | } else { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 483 | size_y = size; |
| 484 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 485 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 486 | sg = dma->sglist; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 487 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 488 | /* init DMA for Y channel */ |
| 489 | ret = pxa_init_dma_channel(pcdev, buf, dma, 0, CIBR0, size_y, |
| 490 | &sg, &next_ofs); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 491 | if (ret) { |
| 492 | dev_err(pcdev->dev, |
| 493 | "DMA initialization for Y/RGB failed\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 494 | goto fail; |
| 495 | } |
| 496 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 497 | /* init DMA for U channel */ |
| 498 | if (size_u) |
| 499 | ret = pxa_init_dma_channel(pcdev, buf, dma, 1, CIBR1, |
| 500 | size_u, &sg, &next_ofs); |
| 501 | if (ret) { |
| 502 | dev_err(pcdev->dev, |
| 503 | "DMA initialization for U failed\n"); |
| 504 | goto fail_u; |
| 505 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 506 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 507 | /* init DMA for V channel */ |
| 508 | if (size_v) |
| 509 | ret = pxa_init_dma_channel(pcdev, buf, dma, 2, CIBR2, |
| 510 | size_v, &sg, &next_ofs); |
| 511 | if (ret) { |
| 512 | dev_err(pcdev->dev, |
| 513 | "DMA initialization for V failed\n"); |
| 514 | goto fail_v; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 515 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 516 | |
| 517 | vb->state = VIDEOBUF_PREPARED; |
| 518 | } |
| 519 | |
| 520 | buf->inwork = 0; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 521 | pxa_videobuf_set_actdma(pcdev, buf); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 522 | |
| 523 | return 0; |
| 524 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 525 | fail_v: |
| 526 | dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size, |
| 527 | buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); |
| 528 | fail_u: |
| 529 | dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size, |
| 530 | buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 531 | fail: |
| 532 | free_buffer(vq, buf); |
| 533 | out: |
| 534 | buf->inwork = 0; |
| 535 | return ret; |
| 536 | } |
| 537 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 538 | /** |
| 539 | * pxa_dma_start_channels - start DMA channel for active buffer |
| 540 | * @pcdev: pxa camera device |
| 541 | * |
| 542 | * Initialize DMA channels to the beginning of the active video buffer, and |
| 543 | * start these channels. |
| 544 | */ |
| 545 | static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev) |
| 546 | { |
| 547 | int i; |
| 548 | struct pxa_buffer *active; |
| 549 | |
| 550 | active = pcdev->active; |
| 551 | |
| 552 | for (i = 0; i < pcdev->channels; i++) { |
| 553 | dev_dbg(pcdev->dev, "%s (channel=%d) ddadr=%08x\n", __func__, |
| 554 | i, active->dmas[i].sg_dma); |
| 555 | DDADR(pcdev->dma_chans[i]) = active->dmas[i].sg_dma; |
| 556 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev) |
| 561 | { |
| 562 | int i; |
| 563 | |
| 564 | for (i = 0; i < pcdev->channels; i++) { |
| 565 | dev_dbg(pcdev->dev, "%s (channel=%d)\n", __func__, i); |
| 566 | DCSR(pcdev->dma_chans[i]) = 0; |
| 567 | } |
| 568 | } |
| 569 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 570 | static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev, |
| 571 | struct pxa_buffer *buf) |
| 572 | { |
| 573 | int i; |
| 574 | struct pxa_dma_desc *buf_last_desc; |
| 575 | |
| 576 | for (i = 0; i < pcdev->channels; i++) { |
| 577 | buf_last_desc = buf->dmas[i].sg_cpu + buf->dmas[i].sglen; |
| 578 | buf_last_desc->ddadr = DDADR_STOP; |
| 579 | |
Guennadi Liakhovetski | ae7410e | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 580 | if (pcdev->sg_tail[i]) |
| 581 | /* Link the new buffer to the old tail */ |
| 582 | pcdev->sg_tail[i]->ddadr = buf->dmas[i].sg_dma; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 583 | |
Guennadi Liakhovetski | ae7410e | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 584 | /* Update the channel tail */ |
| 585 | pcdev->sg_tail[i] = buf_last_desc; |
| 586 | } |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 587 | } |
| 588 | |
| 589 | /** |
| 590 | * pxa_camera_start_capture - start video capturing |
| 591 | * @pcdev: camera device |
| 592 | * |
| 593 | * Launch capturing. DMA channels should not be active yet. They should get |
| 594 | * activated at the end of frame interrupt, to capture only whole frames, and |
| 595 | * never begin the capture of a partial frame. |
| 596 | */ |
| 597 | static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev) |
| 598 | { |
| 599 | unsigned long cicr0, cifr; |
| 600 | |
| 601 | dev_dbg(pcdev->dev, "%s\n", __func__); |
| 602 | /* Reset the FIFOs */ |
| 603 | cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; |
| 604 | __raw_writel(cifr, pcdev->base + CIFR); |
| 605 | /* Enable End-Of-Frame Interrupt */ |
| 606 | cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB; |
| 607 | cicr0 &= ~CICR0_EOFM; |
| 608 | __raw_writel(cicr0, pcdev->base + CICR0); |
| 609 | } |
| 610 | |
| 611 | static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev) |
| 612 | { |
| 613 | unsigned long cicr0; |
| 614 | |
| 615 | pxa_dma_stop_channels(pcdev); |
| 616 | |
| 617 | cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB; |
| 618 | __raw_writel(cicr0, pcdev->base + CICR0); |
| 619 | |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 620 | pcdev->active = NULL; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 621 | dev_dbg(pcdev->dev, "%s\n", __func__); |
| 622 | } |
| 623 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 624 | static void pxa_videobuf_queue(struct videobuf_queue *vq, |
| 625 | struct videobuf_buffer *vb) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 626 | { |
| 627 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 628 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 629 | struct pxa_camera_dev *pcdev = ici->priv; |
| 630 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 631 | unsigned long flags; |
| 632 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 633 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d active=%p\n", __func__, |
| 634 | vb, vb->baddr, vb->bsize, pcdev->active); |
| 635 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 636 | spin_lock_irqsave(&pcdev->lock, flags); |
| 637 | |
| 638 | list_add_tail(&vb->queue, &pcdev->capture); |
| 639 | |
| 640 | vb->state = VIDEOBUF_ACTIVE; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 641 | pxa_dma_add_tail_buf(pcdev, buf); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 642 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 643 | if (!pcdev->active) |
| 644 | pxa_camera_start_capture(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 645 | |
| 646 | spin_unlock_irqrestore(&pcdev->lock, flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 647 | } |
| 648 | |
| 649 | static void pxa_videobuf_release(struct videobuf_queue *vq, |
| 650 | struct videobuf_buffer *vb) |
| 651 | { |
| 652 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
| 653 | #ifdef DEBUG |
| 654 | struct soc_camera_device *icd = vq->priv_data; |
| 655 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 656 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 657 | vb, vb->baddr, vb->bsize); |
| 658 | |
| 659 | switch (vb->state) { |
| 660 | case VIDEOBUF_ACTIVE: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 661 | dev_dbg(&icd->dev, "%s (active)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 662 | break; |
| 663 | case VIDEOBUF_QUEUED: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 664 | dev_dbg(&icd->dev, "%s (queued)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 665 | break; |
| 666 | case VIDEOBUF_PREPARED: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 667 | dev_dbg(&icd->dev, "%s (prepared)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 668 | break; |
| 669 | default: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 670 | dev_dbg(&icd->dev, "%s (unknown)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 671 | break; |
| 672 | } |
| 673 | #endif |
| 674 | |
| 675 | free_buffer(vq, buf); |
| 676 | } |
| 677 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 678 | static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, |
| 679 | struct videobuf_buffer *vb, |
| 680 | struct pxa_buffer *buf) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 681 | { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 682 | int i; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 683 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 684 | /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ |
| 685 | list_del_init(&vb->queue); |
| 686 | vb->state = VIDEOBUF_DONE; |
| 687 | do_gettimeofday(&vb->ts); |
| 688 | vb->field_count++; |
| 689 | wake_up(&vb->done); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 690 | dev_dbg(pcdev->dev, "%s dequeud buffer (vb=0x%p)\n", __func__, vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 691 | |
| 692 | if (list_empty(&pcdev->capture)) { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 693 | pxa_camera_stop_capture(pcdev); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 694 | for (i = 0; i < pcdev->channels; i++) |
| 695 | pcdev->sg_tail[i] = NULL; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 696 | return; |
| 697 | } |
| 698 | |
| 699 | pcdev->active = list_entry(pcdev->capture.next, |
| 700 | struct pxa_buffer, vb.queue); |
| 701 | } |
| 702 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 703 | /** |
| 704 | * pxa_camera_check_link_miss - check missed DMA linking |
| 705 | * @pcdev: camera device |
| 706 | * |
| 707 | * The DMA chaining is done with DMA running. This means a tiny temporal window |
| 708 | * remains, where a buffer is queued on the chain, while the chain is already |
| 709 | * stopped. This means the tailed buffer would never be transfered by DMA. |
| 710 | * This function restarts the capture for this corner case, where : |
| 711 | * - DADR() == DADDR_STOP |
| 712 | * - a videobuffer is queued on the pcdev->capture list |
| 713 | * |
| 714 | * Please check the "DMA hot chaining timeslice issue" in |
| 715 | * Documentation/video4linux/pxa_camera.txt |
| 716 | * |
| 717 | * Context: should only be called within the dma irq handler |
| 718 | */ |
| 719 | static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev) |
| 720 | { |
| 721 | int i, is_dma_stopped = 1; |
| 722 | |
| 723 | for (i = 0; i < pcdev->channels; i++) |
| 724 | if (DDADR(pcdev->dma_chans[i]) != DDADR_STOP) |
| 725 | is_dma_stopped = 0; |
| 726 | dev_dbg(pcdev->dev, "%s : top queued buffer=%p, dma_stopped=%d\n", |
| 727 | __func__, pcdev->active, is_dma_stopped); |
| 728 | if (pcdev->active && is_dma_stopped) |
| 729 | pxa_camera_start_capture(pcdev); |
| 730 | } |
| 731 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 732 | static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, |
| 733 | enum pxa_camera_active_dma act_dma) |
| 734 | { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 735 | struct pxa_buffer *buf; |
| 736 | unsigned long flags; |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 737 | u32 status, camera_status, overrun; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 738 | struct videobuf_buffer *vb; |
| 739 | |
| 740 | spin_lock_irqsave(&pcdev->lock, flags); |
| 741 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 742 | status = DCSR(channel); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 743 | DCSR(channel) = status; |
| 744 | |
| 745 | camera_status = __raw_readl(pcdev->base + CISR); |
| 746 | overrun = CISR_IFO_0; |
| 747 | if (pcdev->channels == 3) |
| 748 | overrun |= CISR_IFO_1 | CISR_IFO_2; |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 749 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 750 | if (status & DCSR_BUSERR) { |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 751 | dev_err(pcdev->dev, "DMA Bus Error IRQ!\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 752 | goto out; |
| 753 | } |
| 754 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 755 | if (!(status & (DCSR_ENDINTR | DCSR_STARTINTR))) { |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 756 | dev_err(pcdev->dev, "Unknown DMA IRQ source, " |
| 757 | "status: 0x%08x\n", status); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 758 | goto out; |
| 759 | } |
| 760 | |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 761 | /* |
| 762 | * pcdev->active should not be NULL in DMA irq handler. |
| 763 | * |
| 764 | * But there is one corner case : if capture was stopped due to an |
| 765 | * overrun of channel 1, and at that same channel 2 was completed. |
| 766 | * |
| 767 | * When handling the overrun in DMA irq for channel 1, we'll stop the |
| 768 | * capture and restart it (and thus set pcdev->active to NULL). But the |
| 769 | * DMA irq handler will already be pending for channel 2. So on entering |
| 770 | * the DMA irq handler for channel 2 there will be no active buffer, yet |
| 771 | * that is normal. |
| 772 | */ |
| 773 | if (!pcdev->active) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 774 | goto out; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 775 | |
| 776 | vb = &pcdev->active->vb; |
| 777 | buf = container_of(vb, struct pxa_buffer, vb); |
| 778 | WARN_ON(buf->inwork || list_empty(&vb->queue)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 779 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 780 | dev_dbg(pcdev->dev, "%s channel=%d %s%s(vb=0x%p) dma.desc=%x\n", |
| 781 | __func__, channel, status & DCSR_STARTINTR ? "SOF " : "", |
| 782 | status & DCSR_ENDINTR ? "EOF " : "", vb, DDADR(channel)); |
| 783 | |
| 784 | if (status & DCSR_ENDINTR) { |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 785 | /* |
| 786 | * It's normal if the last frame creates an overrun, as there |
| 787 | * are no more DMA descriptors to fetch from QCI fifos |
| 788 | */ |
| 789 | if (camera_status & overrun && |
| 790 | !list_is_last(pcdev->capture.next, &pcdev->capture)) { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 791 | dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", |
| 792 | camera_status); |
| 793 | pxa_camera_stop_capture(pcdev); |
| 794 | pxa_camera_start_capture(pcdev); |
| 795 | goto out; |
| 796 | } |
| 797 | buf->active_dma &= ~act_dma; |
| 798 | if (!buf->active_dma) { |
| 799 | pxa_camera_wakeup(pcdev, vb, buf); |
| 800 | pxa_camera_check_link_miss(pcdev); |
| 801 | } |
| 802 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 803 | |
| 804 | out: |
| 805 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 806 | } |
| 807 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 808 | static void pxa_camera_dma_irq_y(int channel, void *data) |
| 809 | { |
| 810 | struct pxa_camera_dev *pcdev = data; |
| 811 | pxa_camera_dma_irq(channel, pcdev, DMA_Y); |
| 812 | } |
| 813 | |
| 814 | static void pxa_camera_dma_irq_u(int channel, void *data) |
| 815 | { |
| 816 | struct pxa_camera_dev *pcdev = data; |
| 817 | pxa_camera_dma_irq(channel, pcdev, DMA_U); |
| 818 | } |
| 819 | |
| 820 | static void pxa_camera_dma_irq_v(int channel, void *data) |
| 821 | { |
| 822 | struct pxa_camera_dev *pcdev = data; |
| 823 | pxa_camera_dma_irq(channel, pcdev, DMA_V); |
| 824 | } |
| 825 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 826 | static struct videobuf_queue_ops pxa_videobuf_ops = { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 827 | .buf_setup = pxa_videobuf_setup, |
| 828 | .buf_prepare = pxa_videobuf_prepare, |
| 829 | .buf_queue = pxa_videobuf_queue, |
| 830 | .buf_release = pxa_videobuf_release, |
| 831 | }; |
| 832 | |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 833 | static void pxa_camera_init_videobuf(struct videobuf_queue *q, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 834 | struct soc_camera_device *icd) |
| 835 | { |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 836 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 837 | struct pxa_camera_dev *pcdev = ici->priv; |
| 838 | |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 839 | /* We must pass NULL as dev pointer, then all pci_* dma operations |
| 840 | * transform to normal dma_* ones. */ |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 841 | videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 842 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
| 843 | sizeof(struct pxa_buffer), icd); |
| 844 | } |
| 845 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 846 | static u32 mclk_get_divisor(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 847 | { |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 848 | unsigned long mclk = pcdev->mclk; |
| 849 | u32 div; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 850 | unsigned long lcdclk; |
| 851 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 852 | lcdclk = clk_get_rate(pcdev->clk); |
| 853 | pcdev->ciclk = lcdclk; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 854 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 855 | /* mclk <= ciclk / 4 (27.4.2) */ |
| 856 | if (mclk > lcdclk / 4) { |
| 857 | mclk = lcdclk / 4; |
| 858 | dev_warn(pcdev->dev, "Limiting master clock to %lu\n", mclk); |
| 859 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 860 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 861 | /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */ |
| 862 | div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; |
| 863 | |
| 864 | /* If we're not supplying MCLK, leave it at 0 */ |
| 865 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 866 | pcdev->mclk = lcdclk / (2 * (div + 1)); |
| 867 | |
| 868 | dev_dbg(pcdev->dev, "LCD clock %luHz, target freq %luHz, " |
| 869 | "divisor %u\n", lcdclk, mclk, div); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 870 | |
| 871 | return div; |
| 872 | } |
| 873 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 874 | static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev, |
| 875 | unsigned long pclk) |
| 876 | { |
| 877 | /* We want a timeout > 1 pixel time, not ">=" */ |
| 878 | u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1; |
| 879 | |
| 880 | __raw_writel(ciclk_per_pixel, pcdev->base + CITOR); |
| 881 | } |
| 882 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 883 | static void pxa_camera_activate(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 884 | { |
| 885 | struct pxacamera_platform_data *pdata = pcdev->pdata; |
| 886 | u32 cicr4 = 0; |
| 887 | |
| 888 | dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n", |
| 889 | pcdev, pdata); |
| 890 | |
| 891 | if (pdata && pdata->init) { |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 892 | dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 893 | pdata->init(pcdev->dev); |
| 894 | } |
| 895 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 896 | /* disable all interrupts */ |
| 897 | __raw_writel(0x3ff, pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 898 | |
| 899 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 900 | cicr4 |= CICR4_PCLK_EN; |
| 901 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 902 | cicr4 |= CICR4_MCLK_EN; |
| 903 | if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| 904 | cicr4 |= CICR4_PCP; |
| 905 | if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| 906 | cicr4 |= CICR4_HSP; |
| 907 | if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| 908 | cicr4 |= CICR4_VSP; |
| 909 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 910 | __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4); |
| 911 | |
| 912 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 913 | /* Initialise the timeout under the assumption pclk = mclk */ |
| 914 | recalculate_fifo_timeout(pcdev, pcdev->mclk); |
| 915 | else |
| 916 | /* "Safe default" - 13MHz */ |
| 917 | recalculate_fifo_timeout(pcdev, 13000000); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 918 | |
| 919 | clk_enable(pcdev->clk); |
| 920 | } |
| 921 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 922 | static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 923 | { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 924 | clk_disable(pcdev->clk); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | static irqreturn_t pxa_camera_irq(int irq, void *data) |
| 928 | { |
| 929 | struct pxa_camera_dev *pcdev = data; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 930 | unsigned long status, cicr0; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 931 | struct pxa_buffer *buf; |
| 932 | struct videobuf_buffer *vb; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 933 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 934 | status = __raw_readl(pcdev->base + CISR); |
| 935 | dev_dbg(pcdev->dev, "Camera interrupt status 0x%lx\n", status); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 936 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 937 | if (!status) |
| 938 | return IRQ_NONE; |
| 939 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 940 | __raw_writel(status, pcdev->base + CISR); |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 941 | |
| 942 | if (status & CISR_EOF) { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 943 | pcdev->active = list_first_entry(&pcdev->capture, |
| 944 | struct pxa_buffer, vb.queue); |
| 945 | vb = &pcdev->active->vb; |
| 946 | buf = container_of(vb, struct pxa_buffer, vb); |
| 947 | pxa_videobuf_set_actdma(pcdev, buf); |
| 948 | |
| 949 | pxa_dma_start_channels(pcdev); |
| 950 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 951 | cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM; |
| 952 | __raw_writel(cicr0, pcdev->base + CICR0); |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 953 | } |
| 954 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 955 | return IRQ_HANDLED; |
| 956 | } |
| 957 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 958 | /* |
| 959 | * The following two functions absolutely depend on the fact, that |
| 960 | * there can be only one camera on PXA quick capture interface |
| 961 | * Called with .video_lock held |
| 962 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 963 | static int pxa_camera_add_device(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 964 | { |
| 965 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 966 | struct pxa_camera_dev *pcdev = ici->priv; |
| 967 | int ret; |
| 968 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 969 | if (pcdev->icd) { |
| 970 | ret = -EBUSY; |
| 971 | goto ebusy; |
| 972 | } |
| 973 | |
| 974 | dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n", |
| 975 | icd->devnum); |
| 976 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 977 | pxa_camera_activate(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 978 | ret = icd->ops->init(icd); |
| 979 | |
| 980 | if (!ret) |
| 981 | pcdev->icd = icd; |
| 982 | |
| 983 | ebusy: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 984 | return ret; |
| 985 | } |
| 986 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 987 | /* Called with .video_lock held */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 988 | static void pxa_camera_remove_device(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 989 | { |
| 990 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 991 | struct pxa_camera_dev *pcdev = ici->priv; |
| 992 | |
| 993 | BUG_ON(icd != pcdev->icd); |
| 994 | |
| 995 | dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n", |
| 996 | icd->devnum); |
| 997 | |
| 998 | /* disable capture, disable interrupts */ |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 999 | __raw_writel(0x3ff, pcdev->base + CICR0); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1000 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1001 | /* Stop DMA engine */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1002 | DCSR(pcdev->dma_chans[0]) = 0; |
| 1003 | DCSR(pcdev->dma_chans[1]) = 0; |
| 1004 | DCSR(pcdev->dma_chans[2]) = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1005 | |
| 1006 | icd->ops->release(icd); |
| 1007 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1008 | pxa_camera_deactivate(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1009 | |
| 1010 | pcdev->icd = NULL; |
| 1011 | } |
| 1012 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1013 | static int test_platform_param(struct pxa_camera_dev *pcdev, |
| 1014 | unsigned char buswidth, unsigned long *flags) |
| 1015 | { |
| 1016 | /* |
| 1017 | * Platform specified synchronization and pixel clock polarities are |
| 1018 | * only a recommendation and are only used during probing. The PXA270 |
| 1019 | * quick capture interface supports both. |
| 1020 | */ |
| 1021 | *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| 1022 | SOCAM_MASTER : SOCAM_SLAVE) | |
| 1023 | SOCAM_HSYNC_ACTIVE_HIGH | |
| 1024 | SOCAM_HSYNC_ACTIVE_LOW | |
| 1025 | SOCAM_VSYNC_ACTIVE_HIGH | |
| 1026 | SOCAM_VSYNC_ACTIVE_LOW | |
Guennadi Liakhovetski | 2d9329f | 2009-02-23 12:12:58 -0300 | [diff] [blame] | 1027 | SOCAM_DATA_ACTIVE_HIGH | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1028 | SOCAM_PCLK_SAMPLE_RISING | |
| 1029 | SOCAM_PCLK_SAMPLE_FALLING; |
| 1030 | |
| 1031 | /* If requested data width is supported by the platform, use it */ |
| 1032 | switch (buswidth) { |
| 1033 | case 10: |
| 1034 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)) |
| 1035 | return -EINVAL; |
| 1036 | *flags |= SOCAM_DATAWIDTH_10; |
| 1037 | break; |
| 1038 | case 9: |
| 1039 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)) |
| 1040 | return -EINVAL; |
| 1041 | *flags |= SOCAM_DATAWIDTH_9; |
| 1042 | break; |
| 1043 | case 8: |
| 1044 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)) |
| 1045 | return -EINVAL; |
| 1046 | *flags |= SOCAM_DATAWIDTH_8; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1047 | break; |
| 1048 | default: |
| 1049 | return -EINVAL; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1050 | } |
| 1051 | |
| 1052 | return 0; |
| 1053 | } |
| 1054 | |
| 1055 | static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1056 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1057 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1058 | struct pxa_camera_dev *pcdev = ici->priv; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1059 | unsigned long dw, bpp, bus_flags, camera_flags, common_flags; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1060 | u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1061 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1062 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1063 | if (ret < 0) |
| 1064 | return ret; |
| 1065 | |
| 1066 | camera_flags = icd->ops->query_bus_param(icd); |
| 1067 | |
| 1068 | common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); |
| 1069 | if (!common_flags) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1070 | return -EINVAL; |
| 1071 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 1072 | pcdev->channels = 1; |
| 1073 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1074 | /* Make choises, based on platform preferences */ |
| 1075 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && |
| 1076 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { |
| 1077 | if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| 1078 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; |
| 1079 | else |
| 1080 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; |
| 1081 | } |
| 1082 | |
| 1083 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && |
| 1084 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { |
| 1085 | if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| 1086 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; |
| 1087 | else |
| 1088 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; |
| 1089 | } |
| 1090 | |
| 1091 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && |
| 1092 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { |
| 1093 | if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| 1094 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; |
| 1095 | else |
| 1096 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; |
| 1097 | } |
| 1098 | |
| 1099 | ret = icd->ops->set_bus_param(icd, common_flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1100 | if (ret < 0) |
| 1101 | return ret; |
| 1102 | |
| 1103 | /* Datawidth is now guaranteed to be equal to one of the three values. |
| 1104 | * We fix bit-per-pixel equal to data-width... */ |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1105 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
| 1106 | case SOCAM_DATAWIDTH_10: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1107 | dw = 4; |
| 1108 | bpp = 0x40; |
| 1109 | break; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1110 | case SOCAM_DATAWIDTH_9: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1111 | dw = 3; |
| 1112 | bpp = 0x20; |
| 1113 | break; |
| 1114 | default: |
| 1115 | /* Actually it can only be 8 now, |
| 1116 | * default is just to silence compiler warnings */ |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1117 | case SOCAM_DATAWIDTH_8: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1118 | dw = 2; |
| 1119 | bpp = 0; |
| 1120 | } |
| 1121 | |
| 1122 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1123 | cicr4 |= CICR4_PCLK_EN; |
| 1124 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 1125 | cicr4 |= CICR4_MCLK_EN; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1126 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1127 | cicr4 |= CICR4_PCP; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1128 | if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1129 | cicr4 |= CICR4_HSP; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1130 | if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1131 | cicr4 |= CICR4_VSP; |
| 1132 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1133 | cicr0 = __raw_readl(pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1134 | if (cicr0 & CICR0_ENB) |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1135 | __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1136 | |
| 1137 | cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; |
| 1138 | |
| 1139 | switch (pixfmt) { |
| 1140 | case V4L2_PIX_FMT_YUV422P: |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 1141 | pcdev->channels = 3; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1142 | cicr1 |= CICR1_YCBCR_F; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1143 | /* |
| 1144 | * Normally, pxa bus wants as input UYVY format. We allow all |
| 1145 | * reorderings of the YUV422 format, as no processing is done, |
| 1146 | * and the YUV stream is just passed through without any |
| 1147 | * transformation. Note that UYVY is the only format that |
| 1148 | * should be used if pxa framebuffer Overlay2 is used. |
| 1149 | */ |
| 1150 | case V4L2_PIX_FMT_UYVY: |
| 1151 | case V4L2_PIX_FMT_VYUY: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1152 | case V4L2_PIX_FMT_YUYV: |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1153 | case V4L2_PIX_FMT_YVYU: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1154 | cicr1 |= CICR1_COLOR_SP_VAL(2); |
| 1155 | break; |
| 1156 | case V4L2_PIX_FMT_RGB555: |
| 1157 | cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) | |
| 1158 | CICR1_TBIT | CICR1_COLOR_SP_VAL(1); |
| 1159 | break; |
| 1160 | case V4L2_PIX_FMT_RGB565: |
| 1161 | cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2); |
| 1162 | break; |
| 1163 | } |
| 1164 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1165 | cicr2 = 0; |
| 1166 | cicr3 = CICR3_LPF_VAL(icd->height - 1) | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1167 | CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top)); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1168 | cicr4 |= pcdev->mclk_divisor; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1169 | |
| 1170 | __raw_writel(cicr1, pcdev->base + CICR1); |
| 1171 | __raw_writel(cicr2, pcdev->base + CICR2); |
| 1172 | __raw_writel(cicr3, pcdev->base + CICR3); |
| 1173 | __raw_writel(cicr4, pcdev->base + CICR4); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1174 | |
| 1175 | /* CIF interrupts are not used, only DMA */ |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1176 | cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| 1177 | CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)); |
| 1178 | cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK; |
| 1179 | __raw_writel(cicr0, pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1180 | |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1184 | static int pxa_camera_try_bus_param(struct soc_camera_device *icd, |
| 1185 | unsigned char buswidth) |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1186 | { |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1187 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1188 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1189 | unsigned long bus_flags, camera_flags; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1190 | int ret = test_platform_param(pcdev, buswidth, &bus_flags); |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1191 | |
| 1192 | if (ret < 0) |
| 1193 | return ret; |
| 1194 | |
| 1195 | camera_flags = icd->ops->query_bus_param(icd); |
| 1196 | |
| 1197 | return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL; |
| 1198 | } |
| 1199 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1200 | static const struct soc_camera_data_format pxa_camera_formats[] = { |
| 1201 | { |
| 1202 | .name = "Planar YUV422 16 bit", |
| 1203 | .depth = 16, |
| 1204 | .fourcc = V4L2_PIX_FMT_YUV422P, |
| 1205 | .colorspace = V4L2_COLORSPACE_JPEG, |
| 1206 | }, |
| 1207 | }; |
| 1208 | |
| 1209 | static bool buswidth_supported(struct soc_camera_device *icd, int depth) |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1210 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1211 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1212 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1213 | |
| 1214 | switch (depth) { |
| 1215 | case 8: |
| 1216 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8); |
| 1217 | case 9: |
| 1218 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9); |
| 1219 | case 10: |
| 1220 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10); |
| 1221 | } |
| 1222 | return false; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1223 | } |
| 1224 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1225 | static int required_buswidth(const struct soc_camera_data_format *fmt) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1226 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1227 | switch (fmt->fourcc) { |
| 1228 | case V4L2_PIX_FMT_UYVY: |
| 1229 | case V4L2_PIX_FMT_VYUY: |
| 1230 | case V4L2_PIX_FMT_YUYV: |
| 1231 | case V4L2_PIX_FMT_YVYU: |
| 1232 | case V4L2_PIX_FMT_RGB565: |
| 1233 | case V4L2_PIX_FMT_RGB555: |
| 1234 | return 8; |
| 1235 | default: |
| 1236 | return fmt->depth; |
| 1237 | } |
| 1238 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1239 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1240 | static int pxa_camera_get_formats(struct soc_camera_device *icd, int idx, |
| 1241 | struct soc_camera_format_xlate *xlate) |
| 1242 | { |
| 1243 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1244 | int formats = 0, buswidth, ret; |
| 1245 | |
| 1246 | buswidth = required_buswidth(icd->formats + idx); |
| 1247 | |
| 1248 | if (!buswidth_supported(icd, buswidth)) |
| 1249 | return 0; |
| 1250 | |
| 1251 | ret = pxa_camera_try_bus_param(icd, buswidth); |
| 1252 | if (ret < 0) |
| 1253 | return 0; |
| 1254 | |
| 1255 | switch (icd->formats[idx].fourcc) { |
| 1256 | case V4L2_PIX_FMT_UYVY: |
| 1257 | formats++; |
| 1258 | if (xlate) { |
| 1259 | xlate->host_fmt = &pxa_camera_formats[0]; |
| 1260 | xlate->cam_fmt = icd->formats + idx; |
| 1261 | xlate->buswidth = buswidth; |
| 1262 | xlate++; |
| 1263 | dev_dbg(&ici->dev, "Providing format %s using %s\n", |
| 1264 | pxa_camera_formats[0].name, |
| 1265 | icd->formats[idx].name); |
| 1266 | } |
| 1267 | case V4L2_PIX_FMT_VYUY: |
| 1268 | case V4L2_PIX_FMT_YUYV: |
| 1269 | case V4L2_PIX_FMT_YVYU: |
| 1270 | case V4L2_PIX_FMT_RGB565: |
| 1271 | case V4L2_PIX_FMT_RGB555: |
| 1272 | formats++; |
| 1273 | if (xlate) { |
| 1274 | xlate->host_fmt = icd->formats + idx; |
| 1275 | xlate->cam_fmt = icd->formats + idx; |
| 1276 | xlate->buswidth = buswidth; |
| 1277 | xlate++; |
| 1278 | dev_dbg(&ici->dev, "Providing format %s packed\n", |
| 1279 | icd->formats[idx].name); |
| 1280 | } |
| 1281 | break; |
| 1282 | default: |
| 1283 | /* Generic pass-through */ |
| 1284 | formats++; |
| 1285 | if (xlate) { |
| 1286 | xlate->host_fmt = icd->formats + idx; |
| 1287 | xlate->cam_fmt = icd->formats + idx; |
| 1288 | xlate->buswidth = icd->formats[idx].depth; |
| 1289 | xlate++; |
| 1290 | dev_dbg(&ici->dev, |
| 1291 | "Providing format %s in pass-through mode\n", |
| 1292 | icd->formats[idx].name); |
| 1293 | } |
| 1294 | } |
| 1295 | |
| 1296 | return formats; |
| 1297 | } |
| 1298 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1299 | static int pxa_camera_set_crop(struct soc_camera_device *icd, |
| 1300 | struct v4l2_rect *rect) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1301 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1302 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1303 | struct pxa_camera_dev *pcdev = ici->priv; |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1304 | struct soc_camera_sense sense = { |
| 1305 | .master_clock = pcdev->mclk, |
| 1306 | .pixel_clock_max = pcdev->ciclk / 4, |
| 1307 | }; |
Guennadi Liakhovetski | 0ad675e | 2009-02-23 12:11:25 -0300 | [diff] [blame] | 1308 | int ret; |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1309 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1310 | /* If PCLK is used to latch data from the sensor, check sense */ |
| 1311 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1312 | icd->sense = &sense; |
| 1313 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1314 | ret = icd->ops->set_crop(icd, rect); |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1315 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1316 | icd->sense = NULL; |
| 1317 | |
| 1318 | if (ret < 0) { |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1319 | dev_warn(&ici->dev, "Failed to crop to %ux%u@%u:%u\n", |
| 1320 | rect->width, rect->height, rect->left, rect->top); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1321 | } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| 1322 | if (sense.pixel_clock > sense.pixel_clock_max) { |
| 1323 | dev_err(&ici->dev, |
| 1324 | "pixel clock %lu set by the camera too high!", |
| 1325 | sense.pixel_clock); |
| 1326 | return -EIO; |
| 1327 | } |
| 1328 | recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| 1329 | } |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1330 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1331 | return ret; |
| 1332 | } |
| 1333 | |
| 1334 | static int pxa_camera_set_fmt(struct soc_camera_device *icd, |
| 1335 | struct v4l2_format *f) |
| 1336 | { |
| 1337 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1338 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1339 | const struct soc_camera_data_format *cam_fmt = NULL; |
| 1340 | const struct soc_camera_format_xlate *xlate = NULL; |
| 1341 | struct soc_camera_sense sense = { |
| 1342 | .master_clock = pcdev->mclk, |
| 1343 | .pixel_clock_max = pcdev->ciclk / 4, |
| 1344 | }; |
| 1345 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1346 | struct v4l2_format cam_f = *f; |
| 1347 | int ret; |
| 1348 | |
| 1349 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
| 1350 | if (!xlate) { |
| 1351 | dev_warn(&ici->dev, "Format %x not found\n", pix->pixelformat); |
| 1352 | return -EINVAL; |
| 1353 | } |
| 1354 | |
| 1355 | cam_fmt = xlate->cam_fmt; |
| 1356 | |
| 1357 | /* If PCLK is used to latch data from the sensor, check sense */ |
| 1358 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1359 | icd->sense = &sense; |
| 1360 | |
| 1361 | cam_f.fmt.pix.pixelformat = cam_fmt->fourcc; |
| 1362 | ret = icd->ops->set_fmt(icd, &cam_f); |
| 1363 | |
| 1364 | icd->sense = NULL; |
| 1365 | |
| 1366 | if (ret < 0) { |
| 1367 | dev_warn(&ici->dev, "Failed to configure for format %x\n", |
| 1368 | pix->pixelformat); |
| 1369 | } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| 1370 | if (sense.pixel_clock > sense.pixel_clock_max) { |
| 1371 | dev_err(&ici->dev, |
| 1372 | "pixel clock %lu set by the camera too high!", |
| 1373 | sense.pixel_clock); |
| 1374 | return -EIO; |
| 1375 | } |
| 1376 | recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| 1377 | } |
| 1378 | |
| 1379 | if (!ret) { |
Guennadi Liakhovetski | 0ad675e | 2009-02-23 12:11:25 -0300 | [diff] [blame] | 1380 | icd->buswidth = xlate->buswidth; |
| 1381 | icd->current_fmt = xlate->host_fmt; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1382 | } |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1383 | |
| 1384 | return ret; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1385 | } |
| 1386 | |
Guennadi Liakhovetski | d8fac21 | 2008-12-01 09:45:21 -0300 | [diff] [blame] | 1387 | static int pxa_camera_try_fmt(struct soc_camera_device *icd, |
| 1388 | struct v4l2_format *f) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1389 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1390 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1391 | const struct soc_camera_format_xlate *xlate; |
| 1392 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1393 | __u32 pixfmt = pix->pixelformat; |
Guennadi Liakhovetski | 06daa1a | 2008-12-18 12:52:08 -0300 | [diff] [blame] | 1394 | enum v4l2_field field; |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1395 | int ret; |
Guennadi Liakhovetski | a2c8c68 | 2008-12-01 09:44:53 -0300 | [diff] [blame] | 1396 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1397 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| 1398 | if (!xlate) { |
| 1399 | dev_warn(&ici->dev, "Format %x not found\n", pixfmt); |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1400 | return -EINVAL; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1401 | } |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1402 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1403 | /* limit to pxa hardware capabilities */ |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1404 | if (pix->height < 32) |
| 1405 | pix->height = 32; |
| 1406 | if (pix->height > 2048) |
| 1407 | pix->height = 2048; |
| 1408 | if (pix->width < 48) |
| 1409 | pix->width = 48; |
| 1410 | if (pix->width > 2048) |
| 1411 | pix->width = 2048; |
| 1412 | pix->width &= ~0x01; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1413 | |
Robert Jarzmik | 92a8337 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 1414 | /* |
| 1415 | * YUV422P planar format requires images size to be a 16 bytes |
| 1416 | * multiple. If not, zeros will be inserted between Y and U planes, and |
| 1417 | * U and V planes, and YUV422P standard would be violated. |
| 1418 | */ |
| 1419 | if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P) { |
| 1420 | if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) |
| 1421 | pix->height = ALIGN(pix->height, YUV422P_X_Y_ALIGN); |
| 1422 | if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) |
| 1423 | pix->width = ALIGN(pix->width, YUV422P_X_Y_ALIGN); |
| 1424 | } |
| 1425 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1426 | pix->bytesperline = pix->width * |
| 1427 | DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
| 1428 | pix->sizeimage = pix->height * pix->bytesperline; |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1429 | |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1430 | /* camera has to see its format, but the user the original one */ |
| 1431 | pix->pixelformat = xlate->cam_fmt->fourcc; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1432 | /* limit to sensor capabilities */ |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1433 | ret = icd->ops->try_fmt(icd, f); |
| 1434 | pix->pixelformat = xlate->host_fmt->fourcc; |
| 1435 | |
Guennadi Liakhovetski | 06daa1a | 2008-12-18 12:52:08 -0300 | [diff] [blame] | 1436 | field = pix->field; |
| 1437 | |
| 1438 | if (field == V4L2_FIELD_ANY) { |
| 1439 | pix->field = V4L2_FIELD_NONE; |
| 1440 | } else if (field != V4L2_FIELD_NONE) { |
| 1441 | dev_err(&icd->dev, "Field type %d unsupported.\n", field); |
| 1442 | return -EINVAL; |
| 1443 | } |
| 1444 | |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1445 | return ret; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1446 | } |
| 1447 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1448 | static int pxa_camera_reqbufs(struct soc_camera_file *icf, |
| 1449 | struct v4l2_requestbuffers *p) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1450 | { |
| 1451 | int i; |
| 1452 | |
| 1453 | /* This is for locking debugging only. I removed spinlocks and now I |
| 1454 | * check whether .prepare is ever called on a linked buffer, or whether |
| 1455 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now |
| 1456 | * it hadn't triggered */ |
| 1457 | for (i = 0; i < p->count; i++) { |
| 1458 | struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i], |
| 1459 | struct pxa_buffer, vb); |
| 1460 | buf->inwork = 0; |
| 1461 | INIT_LIST_HEAD(&buf->vb.queue); |
| 1462 | } |
| 1463 | |
| 1464 | return 0; |
| 1465 | } |
| 1466 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1467 | static unsigned int pxa_camera_poll(struct file *file, poll_table *pt) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1468 | { |
| 1469 | struct soc_camera_file *icf = file->private_data; |
| 1470 | struct pxa_buffer *buf; |
| 1471 | |
| 1472 | buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer, |
| 1473 | vb.stream); |
| 1474 | |
| 1475 | poll_wait(file, &buf->vb.done, pt); |
| 1476 | |
| 1477 | if (buf->vb.state == VIDEOBUF_DONE || |
| 1478 | buf->vb.state == VIDEOBUF_ERROR) |
| 1479 | return POLLIN|POLLRDNORM; |
| 1480 | |
| 1481 | return 0; |
| 1482 | } |
| 1483 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1484 | static int pxa_camera_querycap(struct soc_camera_host *ici, |
| 1485 | struct v4l2_capability *cap) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1486 | { |
| 1487 | /* cap->name is set by the firendly caller:-> */ |
| 1488 | strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card)); |
| 1489 | cap->version = PXA_CAM_VERSION_CODE; |
| 1490 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| 1491 | |
| 1492 | return 0; |
| 1493 | } |
| 1494 | |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1495 | static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state) |
| 1496 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1497 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1498 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1499 | int i = 0, ret = 0; |
| 1500 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1501 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0); |
| 1502 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1); |
| 1503 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2); |
| 1504 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3); |
| 1505 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1506 | |
| 1507 | if ((pcdev->icd) && (pcdev->icd->ops->suspend)) |
| 1508 | ret = pcdev->icd->ops->suspend(pcdev->icd, state); |
| 1509 | |
| 1510 | return ret; |
| 1511 | } |
| 1512 | |
| 1513 | static int pxa_camera_resume(struct soc_camera_device *icd) |
| 1514 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1515 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1516 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1517 | int i = 0, ret = 0; |
| 1518 | |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 1519 | DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| 1520 | DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| 1521 | DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1522 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1523 | __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0); |
| 1524 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1); |
| 1525 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2); |
| 1526 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3); |
| 1527 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1528 | |
| 1529 | if ((pcdev->icd) && (pcdev->icd->ops->resume)) |
| 1530 | ret = pcdev->icd->ops->resume(pcdev->icd); |
| 1531 | |
| 1532 | /* Restart frame capture if active buffer exists */ |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 1533 | if (!ret && pcdev->active) |
| 1534 | pxa_camera_start_capture(pcdev); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1535 | |
| 1536 | return ret; |
| 1537 | } |
| 1538 | |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1539 | static struct soc_camera_host_ops pxa_soc_camera_host_ops = { |
| 1540 | .owner = THIS_MODULE, |
| 1541 | .add = pxa_camera_add_device, |
| 1542 | .remove = pxa_camera_remove_device, |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1543 | .suspend = pxa_camera_suspend, |
| 1544 | .resume = pxa_camera_resume, |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1545 | .set_crop = pxa_camera_set_crop, |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1546 | .get_formats = pxa_camera_get_formats, |
Guennadi Liakhovetski | d8fac21 | 2008-12-01 09:45:21 -0300 | [diff] [blame] | 1547 | .set_fmt = pxa_camera_set_fmt, |
| 1548 | .try_fmt = pxa_camera_try_fmt, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 1549 | .init_videobuf = pxa_camera_init_videobuf, |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1550 | .reqbufs = pxa_camera_reqbufs, |
| 1551 | .poll = pxa_camera_poll, |
| 1552 | .querycap = pxa_camera_querycap, |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1553 | .set_bus_param = pxa_camera_set_bus_param, |
| 1554 | }; |
| 1555 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1556 | static int pxa_camera_probe(struct platform_device *pdev) |
| 1557 | { |
| 1558 | struct pxa_camera_dev *pcdev; |
| 1559 | struct resource *res; |
| 1560 | void __iomem *base; |
Guennadi Liakhovetski | 02da465 | 2008-06-13 09:03:45 -0300 | [diff] [blame] | 1561 | int irq; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1562 | int err = 0; |
| 1563 | |
| 1564 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1565 | irq = platform_get_irq(pdev, 0); |
Guennadi Liakhovetski | 02da465 | 2008-06-13 09:03:45 -0300 | [diff] [blame] | 1566 | if (!res || irq < 0) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1567 | err = -ENODEV; |
| 1568 | goto exit; |
| 1569 | } |
| 1570 | |
| 1571 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| 1572 | if (!pcdev) { |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1573 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1574 | err = -ENOMEM; |
| 1575 | goto exit; |
| 1576 | } |
| 1577 | |
Russell King | e0d8b13 | 2008-11-11 17:52:32 +0000 | [diff] [blame] | 1578 | pcdev->clk = clk_get(&pdev->dev, NULL); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1579 | if (IS_ERR(pcdev->clk)) { |
| 1580 | err = PTR_ERR(pcdev->clk); |
| 1581 | goto exit_kfree; |
| 1582 | } |
| 1583 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1584 | platform_set_drvdata(pdev, pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1585 | pcdev->res = res; |
| 1586 | |
| 1587 | pcdev->pdata = pdev->dev.platform_data; |
| 1588 | pcdev->platform_flags = pcdev->pdata->flags; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1589 | if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 | |
| 1590 | PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1591 | /* Platform hasn't set available data widths. This is bad. |
| 1592 | * Warn and use a default. */ |
| 1593 | dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " |
| 1594 | "data widths, using default 10 bit\n"); |
| 1595 | pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10; |
| 1596 | } |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1597 | pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; |
| 1598 | if (!pcdev->mclk) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1599 | dev_warn(&pdev->dev, |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1600 | "mclk == 0! Please, fix your platform data. " |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1601 | "Using default 20MHz\n"); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1602 | pcdev->mclk = 20000000; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1603 | } |
| 1604 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1605 | pcdev->dev = &pdev->dev; |
| 1606 | pcdev->mclk_divisor = mclk_get_divisor(pcdev); |
| 1607 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1608 | INIT_LIST_HEAD(&pcdev->capture); |
| 1609 | spin_lock_init(&pcdev->lock); |
| 1610 | |
| 1611 | /* |
| 1612 | * Request the regions. |
| 1613 | */ |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1614 | if (!request_mem_region(res->start, resource_size(res), |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1615 | PXA_CAM_DRV_NAME)) { |
| 1616 | err = -EBUSY; |
| 1617 | goto exit_clk; |
| 1618 | } |
| 1619 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1620 | base = ioremap(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1621 | if (!base) { |
| 1622 | err = -ENOMEM; |
| 1623 | goto exit_release; |
| 1624 | } |
| 1625 | pcdev->irq = irq; |
| 1626 | pcdev->base = base; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1627 | |
| 1628 | /* request dma */ |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1629 | err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, |
| 1630 | pxa_camera_dma_irq_y, pcdev); |
| 1631 | if (err < 0) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1632 | dev_err(pcdev->dev, "Can't request DMA for Y\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1633 | goto exit_iounmap; |
| 1634 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1635 | pcdev->dma_chans[0] = err; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1636 | dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1637 | |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1638 | err = pxa_request_dma("CI_U", DMA_PRIO_HIGH, |
| 1639 | pxa_camera_dma_irq_u, pcdev); |
| 1640 | if (err < 0) { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1641 | dev_err(pcdev->dev, "Can't request DMA for U\n"); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1642 | goto exit_free_dma_y; |
| 1643 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1644 | pcdev->dma_chans[1] = err; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1645 | dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); |
| 1646 | |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1647 | err = pxa_request_dma("CI_V", DMA_PRIO_HIGH, |
| 1648 | pxa_camera_dma_irq_v, pcdev); |
| 1649 | if (err < 0) { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1650 | dev_err(pcdev->dev, "Can't request DMA for V\n"); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1651 | goto exit_free_dma_u; |
| 1652 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1653 | pcdev->dma_chans[2] = err; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1654 | dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); |
| 1655 | |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 1656 | DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| 1657 | DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| 1658 | DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1659 | |
| 1660 | /* request irq */ |
| 1661 | err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME, |
| 1662 | pcdev); |
| 1663 | if (err) { |
| 1664 | dev_err(pcdev->dev, "Camera interrupt register failed \n"); |
| 1665 | goto exit_free_dma; |
| 1666 | } |
| 1667 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1668 | pcdev->soc_host.drv_name = PXA_CAM_DRV_NAME; |
| 1669 | pcdev->soc_host.ops = &pxa_soc_camera_host_ops; |
| 1670 | pcdev->soc_host.priv = pcdev; |
| 1671 | pcdev->soc_host.dev.parent = &pdev->dev; |
| 1672 | pcdev->soc_host.nr = pdev->id; |
| 1673 | err = soc_camera_host_register(&pcdev->soc_host); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1674 | if (err) |
| 1675 | goto exit_free_irq; |
| 1676 | |
| 1677 | return 0; |
| 1678 | |
| 1679 | exit_free_irq: |
| 1680 | free_irq(pcdev->irq, pcdev); |
| 1681 | exit_free_dma: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1682 | pxa_free_dma(pcdev->dma_chans[2]); |
| 1683 | exit_free_dma_u: |
| 1684 | pxa_free_dma(pcdev->dma_chans[1]); |
| 1685 | exit_free_dma_y: |
| 1686 | pxa_free_dma(pcdev->dma_chans[0]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1687 | exit_iounmap: |
| 1688 | iounmap(base); |
| 1689 | exit_release: |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1690 | release_mem_region(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1691 | exit_clk: |
| 1692 | clk_put(pcdev->clk); |
| 1693 | exit_kfree: |
| 1694 | kfree(pcdev); |
| 1695 | exit: |
| 1696 | return err; |
| 1697 | } |
| 1698 | |
| 1699 | static int __devexit pxa_camera_remove(struct platform_device *pdev) |
| 1700 | { |
| 1701 | struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev); |
| 1702 | struct resource *res; |
| 1703 | |
| 1704 | clk_put(pcdev->clk); |
| 1705 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1706 | pxa_free_dma(pcdev->dma_chans[0]); |
| 1707 | pxa_free_dma(pcdev->dma_chans[1]); |
| 1708 | pxa_free_dma(pcdev->dma_chans[2]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1709 | free_irq(pcdev->irq, pcdev); |
| 1710 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1711 | soc_camera_host_unregister(&pcdev->soc_host); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1712 | |
| 1713 | iounmap(pcdev->base); |
| 1714 | |
| 1715 | res = pcdev->res; |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame^] | 1716 | release_mem_region(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1717 | |
| 1718 | kfree(pcdev); |
| 1719 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1720 | dev_info(&pdev->dev, "PXA Camera driver unloaded\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1721 | |
| 1722 | return 0; |
| 1723 | } |
| 1724 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1725 | static struct platform_driver pxa_camera_driver = { |
| 1726 | .driver = { |
| 1727 | .name = PXA_CAM_DRV_NAME, |
| 1728 | }, |
| 1729 | .probe = pxa_camera_probe, |
| 1730 | .remove = __exit_p(pxa_camera_remove), |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1731 | }; |
| 1732 | |
| 1733 | |
| 1734 | static int __devinit pxa_camera_init(void) |
| 1735 | { |
| 1736 | return platform_driver_register(&pxa_camera_driver); |
| 1737 | } |
| 1738 | |
| 1739 | static void __exit pxa_camera_exit(void) |
| 1740 | { |
Paul Mundt | 01c1e4c | 2008-08-01 19:48:51 -0300 | [diff] [blame] | 1741 | platform_driver_unregister(&pxa_camera_driver); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1742 | } |
| 1743 | |
| 1744 | module_init(pxa_camera_init); |
| 1745 | module_exit(pxa_camera_exit); |
| 1746 | |
| 1747 | MODULE_DESCRIPTION("PXA27x SoC Camera Host driver"); |
| 1748 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| 1749 | MODULE_LICENSE("GPL"); |