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 | /* PXA27x is only supposed to handle one camera on its Quick Capture |
| 207 | * interface. If anyone ever builds hardware to enable more than |
| 208 | * one camera, they will have to modify this driver too */ |
| 209 | struct soc_camera_device *icd; |
| 210 | struct clk *clk; |
| 211 | |
| 212 | unsigned int irq; |
| 213 | void __iomem *base; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 214 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 215 | int channels; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 216 | unsigned int dma_chans[3]; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 217 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 218 | struct pxacamera_platform_data *pdata; |
| 219 | struct resource *res; |
| 220 | unsigned long platform_flags; |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 221 | unsigned long ciclk; |
| 222 | unsigned long mclk; |
| 223 | u32 mclk_divisor; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 224 | |
| 225 | struct list_head capture; |
| 226 | |
| 227 | spinlock_t lock; |
| 228 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 229 | struct pxa_buffer *active; |
Guennadi Liakhovetski | 5aa2110 | 2008-04-22 10:40:23 -0300 | [diff] [blame] | 230 | struct pxa_dma_desc *sg_tail[3]; |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 231 | |
| 232 | u32 save_cicr[5]; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 233 | }; |
| 234 | |
| 235 | static const char *pxa_cam_driver_description = "PXA_Camera"; |
| 236 | |
| 237 | static unsigned int vid_limit = 16; /* Video memory limit, in Mb */ |
| 238 | |
| 239 | /* |
| 240 | * Videobuf operations |
| 241 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 242 | static int pxa_videobuf_setup(struct videobuf_queue *vq, unsigned int *count, |
| 243 | unsigned int *size) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 244 | { |
| 245 | struct soc_camera_device *icd = vq->priv_data; |
| 246 | |
| 247 | dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size); |
| 248 | |
Robert Jarzmik | 92a8337 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 249 | *size = roundup(icd->width * icd->height * |
| 250 | ((icd->current_fmt->depth + 7) >> 3), 8); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 251 | |
| 252 | if (0 == *count) |
| 253 | *count = 32; |
| 254 | while (*size * *count > vid_limit * 1024 * 1024) |
| 255 | (*count)--; |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf) |
| 261 | { |
| 262 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 263 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 264 | struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 265 | int i; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 266 | |
| 267 | BUG_ON(in_interrupt()); |
| 268 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 269 | 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] | 270 | &buf->vb, buf->vb.baddr, buf->vb.bsize); |
| 271 | |
| 272 | /* This waits until this buffer is out of danger, i.e., until it is no |
| 273 | * longer in STATE_QUEUED or STATE_ACTIVE */ |
| 274 | videobuf_waiton(&buf->vb, 0, 0); |
| 275 | videobuf_dma_unmap(vq, dma); |
| 276 | videobuf_dma_free(dma); |
| 277 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 278 | for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) { |
| 279 | if (buf->dmas[i].sg_cpu) |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 280 | dma_free_coherent(ici->dev, buf->dmas[i].sg_size, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 281 | buf->dmas[i].sg_cpu, |
| 282 | buf->dmas[i].sg_dma); |
| 283 | buf->dmas[i].sg_cpu = NULL; |
| 284 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 285 | |
| 286 | buf->vb.state = VIDEOBUF_NEEDS_INIT; |
| 287 | } |
| 288 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 289 | static int calculate_dma_sglen(struct scatterlist *sglist, int sglen, |
| 290 | int sg_first_ofs, int size) |
| 291 | { |
| 292 | int i, offset, dma_len, xfer_len; |
| 293 | struct scatterlist *sg; |
| 294 | |
| 295 | offset = sg_first_ofs; |
| 296 | for_each_sg(sglist, sg, sglen, i) { |
| 297 | dma_len = sg_dma_len(sg); |
| 298 | |
| 299 | /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */ |
| 300 | xfer_len = roundup(min(dma_len - offset, size), 8); |
| 301 | |
| 302 | size = max(0, size - xfer_len); |
| 303 | offset = 0; |
| 304 | if (size == 0) |
| 305 | break; |
| 306 | } |
| 307 | |
| 308 | BUG_ON(size != 0); |
| 309 | return i + 1; |
| 310 | } |
| 311 | |
| 312 | /** |
| 313 | * pxa_init_dma_channel - init dma descriptors |
| 314 | * @pcdev: pxa camera device |
| 315 | * @buf: pxa buffer to find pxa dma channel |
| 316 | * @dma: dma video buffer |
| 317 | * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V') |
| 318 | * @cibr: camera Receive Buffer Register |
| 319 | * @size: bytes to transfer |
| 320 | * @sg_first: first element of sg_list |
| 321 | * @sg_first_ofs: offset in first element of sg_list |
| 322 | * |
| 323 | * Prepares the pxa dma descriptors to transfer one camera channel. |
| 324 | * Beware sg_first and sg_first_ofs are both input and output parameters. |
| 325 | * |
| 326 | * Returns 0 or -ENOMEM if no coherent memory is available |
| 327 | */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 328 | static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev, |
| 329 | struct pxa_buffer *buf, |
| 330 | struct videobuf_dmabuf *dma, int channel, |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 331 | int cibr, int size, |
| 332 | struct scatterlist **sg_first, int *sg_first_ofs) |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 333 | { |
| 334 | struct pxa_cam_dma *pxa_dma = &buf->dmas[channel]; |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 335 | struct scatterlist *sg; |
| 336 | int i, offset, sglen; |
| 337 | int dma_len = 0, xfer_len = 0; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 338 | |
| 339 | if (pxa_dma->sg_cpu) |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 340 | dma_free_coherent(pcdev->soc_host.dev, pxa_dma->sg_size, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 341 | pxa_dma->sg_cpu, pxa_dma->sg_dma); |
| 342 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 343 | sglen = calculate_dma_sglen(*sg_first, dma->sglen, |
| 344 | *sg_first_ofs, size); |
| 345 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 346 | pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc); |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 347 | pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->soc_host.dev, pxa_dma->sg_size, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 348 | &pxa_dma->sg_dma, GFP_KERNEL); |
| 349 | if (!pxa_dma->sg_cpu) |
| 350 | return -ENOMEM; |
| 351 | |
| 352 | pxa_dma->sglen = sglen; |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 353 | offset = *sg_first_ofs; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 354 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 355 | dev_dbg(pcdev->soc_host.dev, "DMA: sg_first=%p, sglen=%d, ofs=%d, dma.desc=%x\n", |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 356 | *sg_first, sglen, *sg_first_ofs, pxa_dma->sg_dma); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 357 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 358 | |
| 359 | for_each_sg(*sg_first, sg, sglen, i) { |
| 360 | dma_len = sg_dma_len(sg); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 361 | |
| 362 | /* 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] | 363 | xfer_len = roundup(min(dma_len - offset, size), 8); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 364 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 365 | size = max(0, size - xfer_len); |
| 366 | |
| 367 | pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr; |
| 368 | pxa_dma->sg_cpu[i].dtadr = sg_dma_address(sg) + offset; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 369 | pxa_dma->sg_cpu[i].dcmd = |
| 370 | DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 371 | #ifdef DEBUG |
| 372 | if (!i) |
| 373 | pxa_dma->sg_cpu[i].dcmd |= DCMD_STARTIRQEN; |
| 374 | #endif |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 375 | pxa_dma->sg_cpu[i].ddadr = |
| 376 | pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc); |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 377 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 378 | dev_vdbg(pcdev->soc_host.dev, "DMA: desc.%08x->@phys=0x%08x, len=%d\n", |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 379 | pxa_dma->sg_dma + i * sizeof(struct pxa_dma_desc), |
| 380 | sg_dma_address(sg) + offset, xfer_len); |
| 381 | offset = 0; |
| 382 | |
| 383 | if (size == 0) |
| 384 | break; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 385 | } |
| 386 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 387 | pxa_dma->sg_cpu[sglen].ddadr = DDADR_STOP; |
| 388 | pxa_dma->sg_cpu[sglen].dcmd = DCMD_FLOWSRC | DCMD_BURST8 | DCMD_ENDIRQEN; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 389 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 390 | /* |
| 391 | * Handle 1 special case : |
| 392 | * - in 3 planes (YUV422P format), we might finish with xfer_len equal |
| 393 | * to dma_len (end on PAGE boundary). In this case, the sg element |
| 394 | * for next plane should be the next after the last used to store the |
| 395 | * last scatter gather RAM page |
| 396 | */ |
| 397 | if (xfer_len >= dma_len) { |
| 398 | *sg_first_ofs = xfer_len - dma_len; |
| 399 | *sg_first = sg_next(sg); |
| 400 | } else { |
| 401 | *sg_first_ofs = xfer_len; |
| 402 | *sg_first = sg; |
| 403 | } |
| 404 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 405 | return 0; |
| 406 | } |
| 407 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 408 | static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev, |
| 409 | struct pxa_buffer *buf) |
| 410 | { |
| 411 | buf->active_dma = DMA_Y; |
| 412 | if (pcdev->channels == 3) |
| 413 | buf->active_dma |= DMA_U | DMA_V; |
| 414 | } |
| 415 | |
| 416 | /* |
| 417 | * Please check the DMA prepared buffer structure in : |
| 418 | * Documentation/video4linux/pxa_camera.txt |
| 419 | * Please check also in pxa_camera_check_link_miss() to understand why DMA chain |
| 420 | * modification while DMA chain is running will work anyway. |
| 421 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 422 | static int pxa_videobuf_prepare(struct videobuf_queue *vq, |
| 423 | struct videobuf_buffer *vb, enum v4l2_field field) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 424 | { |
| 425 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 426 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 427 | struct pxa_camera_dev *pcdev = ici->priv; |
| 428 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 429 | int ret; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 430 | int size_y, size_u = 0, size_v = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 431 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 432 | 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] | 433 | vb, vb->baddr, vb->bsize); |
| 434 | |
| 435 | /* Added list head initialization on alloc */ |
| 436 | WARN_ON(!list_empty(&vb->queue)); |
| 437 | |
| 438 | #ifdef DEBUG |
| 439 | /* This can be useful if you want to see if we actually fill |
| 440 | * the buffer with something */ |
| 441 | memset((void *)vb->baddr, 0xaa, vb->bsize); |
| 442 | #endif |
| 443 | |
| 444 | BUG_ON(NULL == icd->current_fmt); |
| 445 | |
| 446 | /* I think, in buf_prepare you only have to protect global data, |
| 447 | * the actual buffer is yours */ |
| 448 | buf->inwork = 1; |
| 449 | |
| 450 | if (buf->fmt != icd->current_fmt || |
| 451 | vb->width != icd->width || |
| 452 | vb->height != icd->height || |
| 453 | vb->field != field) { |
| 454 | buf->fmt = icd->current_fmt; |
| 455 | vb->width = icd->width; |
| 456 | vb->height = icd->height; |
| 457 | vb->field = field; |
| 458 | vb->state = VIDEOBUF_NEEDS_INIT; |
| 459 | } |
| 460 | |
| 461 | vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3); |
| 462 | if (0 != vb->baddr && vb->bsize < vb->size) { |
| 463 | ret = -EINVAL; |
| 464 | goto out; |
| 465 | } |
| 466 | |
| 467 | if (vb->state == VIDEOBUF_NEEDS_INIT) { |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 468 | int size = vb->size; |
| 469 | int next_ofs = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 470 | struct videobuf_dmabuf *dma = videobuf_to_dma(vb); |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 471 | struct scatterlist *sg; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 472 | |
| 473 | ret = videobuf_iolock(vq, vb, NULL); |
| 474 | if (ret) |
| 475 | goto fail; |
| 476 | |
Guennadi Liakhovetski | 5aa2110 | 2008-04-22 10:40:23 -0300 | [diff] [blame] | 477 | if (pcdev->channels == 3) { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 478 | size_y = size / 2; |
| 479 | size_u = size_v = size / 4; |
| 480 | } else { |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 481 | size_y = size; |
| 482 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 483 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 484 | sg = dma->sglist; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 485 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 486 | /* init DMA for Y channel */ |
| 487 | ret = pxa_init_dma_channel(pcdev, buf, dma, 0, CIBR0, size_y, |
| 488 | &sg, &next_ofs); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 489 | if (ret) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 490 | dev_err(pcdev->soc_host.dev, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 491 | "DMA initialization for Y/RGB failed\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 492 | goto fail; |
| 493 | } |
| 494 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 495 | /* init DMA for U channel */ |
| 496 | if (size_u) |
| 497 | ret = pxa_init_dma_channel(pcdev, buf, dma, 1, CIBR1, |
| 498 | size_u, &sg, &next_ofs); |
| 499 | if (ret) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 500 | dev_err(pcdev->soc_host.dev, |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 501 | "DMA initialization for U failed\n"); |
| 502 | goto fail_u; |
| 503 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 504 | |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 505 | /* init DMA for V channel */ |
| 506 | if (size_v) |
| 507 | ret = pxa_init_dma_channel(pcdev, buf, dma, 2, CIBR2, |
| 508 | size_v, &sg, &next_ofs); |
| 509 | if (ret) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 510 | dev_err(pcdev->soc_host.dev, |
Robert Jarzmik | 37f5aef | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 511 | "DMA initialization for V failed\n"); |
| 512 | goto fail_v; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 513 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 514 | |
| 515 | vb->state = VIDEOBUF_PREPARED; |
| 516 | } |
| 517 | |
| 518 | buf->inwork = 0; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 519 | pxa_videobuf_set_actdma(pcdev, buf); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 520 | |
| 521 | return 0; |
| 522 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 523 | fail_v: |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 524 | dma_free_coherent(pcdev->soc_host.dev, buf->dmas[1].sg_size, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 525 | buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma); |
| 526 | fail_u: |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 527 | dma_free_coherent(pcdev->soc_host.dev, buf->dmas[0].sg_size, |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 528 | buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 529 | fail: |
| 530 | free_buffer(vq, buf); |
| 531 | out: |
| 532 | buf->inwork = 0; |
| 533 | return ret; |
| 534 | } |
| 535 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 536 | /** |
| 537 | * pxa_dma_start_channels - start DMA channel for active buffer |
| 538 | * @pcdev: pxa camera device |
| 539 | * |
| 540 | * Initialize DMA channels to the beginning of the active video buffer, and |
| 541 | * start these channels. |
| 542 | */ |
| 543 | static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev) |
| 544 | { |
| 545 | int i; |
| 546 | struct pxa_buffer *active; |
| 547 | |
| 548 | active = pcdev->active; |
| 549 | |
| 550 | for (i = 0; i < pcdev->channels; i++) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 551 | dev_dbg(pcdev->soc_host.dev, "%s (channel=%d) ddadr=%08x\n", __func__, |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 552 | i, active->dmas[i].sg_dma); |
| 553 | DDADR(pcdev->dma_chans[i]) = active->dmas[i].sg_dma; |
| 554 | DCSR(pcdev->dma_chans[i]) = DCSR_RUN; |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev) |
| 559 | { |
| 560 | int i; |
| 561 | |
| 562 | for (i = 0; i < pcdev->channels; i++) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 563 | dev_dbg(pcdev->soc_host.dev, "%s (channel=%d)\n", __func__, i); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 564 | DCSR(pcdev->dma_chans[i]) = 0; |
| 565 | } |
| 566 | } |
| 567 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 568 | static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev, |
| 569 | struct pxa_buffer *buf) |
| 570 | { |
| 571 | int i; |
| 572 | struct pxa_dma_desc *buf_last_desc; |
| 573 | |
| 574 | for (i = 0; i < pcdev->channels; i++) { |
| 575 | buf_last_desc = buf->dmas[i].sg_cpu + buf->dmas[i].sglen; |
| 576 | buf_last_desc->ddadr = DDADR_STOP; |
| 577 | |
Guennadi Liakhovetski | ae7410e | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 578 | if (pcdev->sg_tail[i]) |
| 579 | /* Link the new buffer to the old tail */ |
| 580 | pcdev->sg_tail[i]->ddadr = buf->dmas[i].sg_dma; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 581 | |
Guennadi Liakhovetski | ae7410e | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 582 | /* Update the channel tail */ |
| 583 | pcdev->sg_tail[i] = buf_last_desc; |
| 584 | } |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 585 | } |
| 586 | |
| 587 | /** |
| 588 | * pxa_camera_start_capture - start video capturing |
| 589 | * @pcdev: camera device |
| 590 | * |
| 591 | * Launch capturing. DMA channels should not be active yet. They should get |
| 592 | * activated at the end of frame interrupt, to capture only whole frames, and |
| 593 | * never begin the capture of a partial frame. |
| 594 | */ |
| 595 | static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev) |
| 596 | { |
| 597 | unsigned long cicr0, cifr; |
| 598 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 599 | dev_dbg(pcdev->soc_host.dev, "%s\n", __func__); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 600 | /* Reset the FIFOs */ |
| 601 | cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F; |
| 602 | __raw_writel(cifr, pcdev->base + CIFR); |
| 603 | /* Enable End-Of-Frame Interrupt */ |
| 604 | cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB; |
| 605 | cicr0 &= ~CICR0_EOFM; |
| 606 | __raw_writel(cicr0, pcdev->base + CICR0); |
| 607 | } |
| 608 | |
| 609 | static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev) |
| 610 | { |
| 611 | unsigned long cicr0; |
| 612 | |
| 613 | pxa_dma_stop_channels(pcdev); |
| 614 | |
| 615 | cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB; |
| 616 | __raw_writel(cicr0, pcdev->base + CICR0); |
| 617 | |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 618 | pcdev->active = NULL; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 619 | dev_dbg(pcdev->soc_host.dev, "%s\n", __func__); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 620 | } |
| 621 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 622 | static void pxa_videobuf_queue(struct videobuf_queue *vq, |
| 623 | struct videobuf_buffer *vb) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 624 | { |
| 625 | struct soc_camera_device *icd = vq->priv_data; |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 626 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 627 | struct pxa_camera_dev *pcdev = ici->priv; |
| 628 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 629 | unsigned long flags; |
| 630 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 631 | dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d active=%p\n", __func__, |
| 632 | vb, vb->baddr, vb->bsize, pcdev->active); |
| 633 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 634 | spin_lock_irqsave(&pcdev->lock, flags); |
| 635 | |
| 636 | list_add_tail(&vb->queue, &pcdev->capture); |
| 637 | |
| 638 | vb->state = VIDEOBUF_ACTIVE; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 639 | pxa_dma_add_tail_buf(pcdev, buf); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 640 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 641 | if (!pcdev->active) |
| 642 | pxa_camera_start_capture(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 643 | |
| 644 | spin_unlock_irqrestore(&pcdev->lock, flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 645 | } |
| 646 | |
| 647 | static void pxa_videobuf_release(struct videobuf_queue *vq, |
| 648 | struct videobuf_buffer *vb) |
| 649 | { |
| 650 | struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb); |
| 651 | #ifdef DEBUG |
| 652 | struct soc_camera_device *icd = vq->priv_data; |
| 653 | |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 654 | 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] | 655 | vb, vb->baddr, vb->bsize); |
| 656 | |
| 657 | switch (vb->state) { |
| 658 | case VIDEOBUF_ACTIVE: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 659 | dev_dbg(&icd->dev, "%s (active)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 660 | break; |
| 661 | case VIDEOBUF_QUEUED: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 662 | dev_dbg(&icd->dev, "%s (queued)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 663 | break; |
| 664 | case VIDEOBUF_PREPARED: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 665 | dev_dbg(&icd->dev, "%s (prepared)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 666 | break; |
| 667 | default: |
Harvey Harrison | 7e28adb | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 668 | dev_dbg(&icd->dev, "%s (unknown)\n", __func__); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 669 | break; |
| 670 | } |
| 671 | #endif |
| 672 | |
| 673 | free_buffer(vq, buf); |
| 674 | } |
| 675 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 676 | static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev, |
| 677 | struct videobuf_buffer *vb, |
| 678 | struct pxa_buffer *buf) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 679 | { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 680 | int i; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 681 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 682 | /* _init is used to debug races, see comment in pxa_camera_reqbufs() */ |
| 683 | list_del_init(&vb->queue); |
| 684 | vb->state = VIDEOBUF_DONE; |
| 685 | do_gettimeofday(&vb->ts); |
| 686 | vb->field_count++; |
| 687 | wake_up(&vb->done); |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 688 | dev_dbg(pcdev->soc_host.dev, "%s dequeud buffer (vb=0x%p)\n", __func__, vb); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 689 | |
| 690 | if (list_empty(&pcdev->capture)) { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 691 | pxa_camera_stop_capture(pcdev); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 692 | for (i = 0; i < pcdev->channels; i++) |
| 693 | pcdev->sg_tail[i] = NULL; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 694 | return; |
| 695 | } |
| 696 | |
| 697 | pcdev->active = list_entry(pcdev->capture.next, |
| 698 | struct pxa_buffer, vb.queue); |
| 699 | } |
| 700 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 701 | /** |
| 702 | * pxa_camera_check_link_miss - check missed DMA linking |
| 703 | * @pcdev: camera device |
| 704 | * |
| 705 | * The DMA chaining is done with DMA running. This means a tiny temporal window |
| 706 | * remains, where a buffer is queued on the chain, while the chain is already |
| 707 | * stopped. This means the tailed buffer would never be transfered by DMA. |
| 708 | * This function restarts the capture for this corner case, where : |
| 709 | * - DADR() == DADDR_STOP |
| 710 | * - a videobuffer is queued on the pcdev->capture list |
| 711 | * |
| 712 | * Please check the "DMA hot chaining timeslice issue" in |
| 713 | * Documentation/video4linux/pxa_camera.txt |
| 714 | * |
| 715 | * Context: should only be called within the dma irq handler |
| 716 | */ |
| 717 | static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev) |
| 718 | { |
| 719 | int i, is_dma_stopped = 1; |
| 720 | |
| 721 | for (i = 0; i < pcdev->channels; i++) |
| 722 | if (DDADR(pcdev->dma_chans[i]) != DDADR_STOP) |
| 723 | is_dma_stopped = 0; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 724 | dev_dbg(pcdev->soc_host.dev, "%s : top queued buffer=%p, dma_stopped=%d\n", |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 725 | __func__, pcdev->active, is_dma_stopped); |
| 726 | if (pcdev->active && is_dma_stopped) |
| 727 | pxa_camera_start_capture(pcdev); |
| 728 | } |
| 729 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 730 | static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev, |
| 731 | enum pxa_camera_active_dma act_dma) |
| 732 | { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 733 | struct pxa_buffer *buf; |
| 734 | unsigned long flags; |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 735 | u32 status, camera_status, overrun; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 736 | struct videobuf_buffer *vb; |
| 737 | |
| 738 | spin_lock_irqsave(&pcdev->lock, flags); |
| 739 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 740 | status = DCSR(channel); |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 741 | DCSR(channel) = status; |
| 742 | |
| 743 | camera_status = __raw_readl(pcdev->base + CISR); |
| 744 | overrun = CISR_IFO_0; |
| 745 | if (pcdev->channels == 3) |
| 746 | overrun |= CISR_IFO_1 | CISR_IFO_2; |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 747 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 748 | if (status & DCSR_BUSERR) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 749 | dev_err(pcdev->soc_host.dev, "DMA Bus Error IRQ!\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 750 | goto out; |
| 751 | } |
| 752 | |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 753 | if (!(status & (DCSR_ENDINTR | DCSR_STARTINTR))) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 754 | dev_err(pcdev->soc_host.dev, "Unknown DMA IRQ source, " |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 755 | "status: 0x%08x\n", status); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 756 | goto out; |
| 757 | } |
| 758 | |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 759 | /* |
| 760 | * pcdev->active should not be NULL in DMA irq handler. |
| 761 | * |
| 762 | * But there is one corner case : if capture was stopped due to an |
| 763 | * overrun of channel 1, and at that same channel 2 was completed. |
| 764 | * |
| 765 | * When handling the overrun in DMA irq for channel 1, we'll stop the |
| 766 | * capture and restart it (and thus set pcdev->active to NULL). But the |
| 767 | * DMA irq handler will already be pending for channel 2. So on entering |
| 768 | * the DMA irq handler for channel 2 there will be no active buffer, yet |
| 769 | * that is normal. |
| 770 | */ |
| 771 | if (!pcdev->active) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 772 | goto out; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 773 | |
| 774 | vb = &pcdev->active->vb; |
| 775 | buf = container_of(vb, struct pxa_buffer, vb); |
| 776 | WARN_ON(buf->inwork || list_empty(&vb->queue)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 777 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 778 | dev_dbg(pcdev->soc_host.dev, "%s channel=%d %s%s(vb=0x%p) dma.desc=%x\n", |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 779 | __func__, channel, status & DCSR_STARTINTR ? "SOF " : "", |
| 780 | status & DCSR_ENDINTR ? "EOF " : "", vb, DDADR(channel)); |
| 781 | |
| 782 | if (status & DCSR_ENDINTR) { |
Robert Jarzmik | 8c62e22 | 2009-03-31 03:44:22 -0300 | [diff] [blame] | 783 | /* |
| 784 | * It's normal if the last frame creates an overrun, as there |
| 785 | * are no more DMA descriptors to fetch from QCI fifos |
| 786 | */ |
| 787 | if (camera_status & overrun && |
| 788 | !list_is_last(pcdev->capture.next, &pcdev->capture)) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 789 | dev_dbg(pcdev->soc_host.dev, "FIFO overrun! CISR: %x\n", |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 790 | camera_status); |
| 791 | pxa_camera_stop_capture(pcdev); |
| 792 | pxa_camera_start_capture(pcdev); |
| 793 | goto out; |
| 794 | } |
| 795 | buf->active_dma &= ~act_dma; |
| 796 | if (!buf->active_dma) { |
| 797 | pxa_camera_wakeup(pcdev, vb, buf); |
| 798 | pxa_camera_check_link_miss(pcdev); |
| 799 | } |
| 800 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 801 | |
| 802 | out: |
| 803 | spin_unlock_irqrestore(&pcdev->lock, flags); |
| 804 | } |
| 805 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 806 | static void pxa_camera_dma_irq_y(int channel, void *data) |
| 807 | { |
| 808 | struct pxa_camera_dev *pcdev = data; |
| 809 | pxa_camera_dma_irq(channel, pcdev, DMA_Y); |
| 810 | } |
| 811 | |
| 812 | static void pxa_camera_dma_irq_u(int channel, void *data) |
| 813 | { |
| 814 | struct pxa_camera_dev *pcdev = data; |
| 815 | pxa_camera_dma_irq(channel, pcdev, DMA_U); |
| 816 | } |
| 817 | |
| 818 | static void pxa_camera_dma_irq_v(int channel, void *data) |
| 819 | { |
| 820 | struct pxa_camera_dev *pcdev = data; |
| 821 | pxa_camera_dma_irq(channel, pcdev, DMA_V); |
| 822 | } |
| 823 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 824 | static struct videobuf_queue_ops pxa_videobuf_ops = { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 825 | .buf_setup = pxa_videobuf_setup, |
| 826 | .buf_prepare = pxa_videobuf_prepare, |
| 827 | .buf_queue = pxa_videobuf_queue, |
| 828 | .buf_release = pxa_videobuf_release, |
| 829 | }; |
| 830 | |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 831 | static void pxa_camera_init_videobuf(struct videobuf_queue *q, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 832 | struct soc_camera_device *icd) |
| 833 | { |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 834 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 835 | struct pxa_camera_dev *pcdev = ici->priv; |
| 836 | |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 837 | /* We must pass NULL as dev pointer, then all pci_* dma operations |
| 838 | * transform to normal dma_* ones. */ |
Magnus Damm | a034d1b | 2008-07-11 20:59:34 -0300 | [diff] [blame] | 839 | videobuf_queue_sg_init(q, &pxa_videobuf_ops, NULL, &pcdev->lock, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 840 | V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE, |
| 841 | sizeof(struct pxa_buffer), icd); |
| 842 | } |
| 843 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 844 | static u32 mclk_get_divisor(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 845 | { |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 846 | unsigned long mclk = pcdev->mclk; |
| 847 | u32 div; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 848 | unsigned long lcdclk; |
| 849 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 850 | lcdclk = clk_get_rate(pcdev->clk); |
| 851 | pcdev->ciclk = lcdclk; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 852 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 853 | /* mclk <= ciclk / 4 (27.4.2) */ |
| 854 | if (mclk > lcdclk / 4) { |
| 855 | mclk = lcdclk / 4; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 856 | dev_warn(pcdev->soc_host.dev, "Limiting master clock to %lu\n", mclk); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 857 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 858 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 859 | /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */ |
| 860 | div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1; |
| 861 | |
| 862 | /* If we're not supplying MCLK, leave it at 0 */ |
| 863 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 864 | pcdev->mclk = lcdclk / (2 * (div + 1)); |
| 865 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 866 | dev_dbg(pcdev->soc_host.dev, "LCD clock %luHz, target freq %luHz, " |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 867 | "divisor %u\n", lcdclk, mclk, div); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 868 | |
| 869 | return div; |
| 870 | } |
| 871 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 872 | static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev, |
| 873 | unsigned long pclk) |
| 874 | { |
| 875 | /* We want a timeout > 1 pixel time, not ">=" */ |
| 876 | u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1; |
| 877 | |
| 878 | __raw_writel(ciclk_per_pixel, pcdev->base + CITOR); |
| 879 | } |
| 880 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 881 | static void pxa_camera_activate(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 882 | { |
| 883 | struct pxacamera_platform_data *pdata = pcdev->pdata; |
| 884 | u32 cicr4 = 0; |
| 885 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 886 | dev_dbg(pcdev->soc_host.dev, "Registered platform device at %p data %p\n", |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 887 | pcdev, pdata); |
| 888 | |
| 889 | if (pdata && pdata->init) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 890 | dev_dbg(pcdev->soc_host.dev, "%s: Init gpios\n", __func__); |
| 891 | pdata->init(pcdev->soc_host.dev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 892 | } |
| 893 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 894 | /* disable all interrupts */ |
| 895 | __raw_writel(0x3ff, pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 896 | |
| 897 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 898 | cicr4 |= CICR4_PCLK_EN; |
| 899 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 900 | cicr4 |= CICR4_MCLK_EN; |
| 901 | if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| 902 | cicr4 |= CICR4_PCP; |
| 903 | if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| 904 | cicr4 |= CICR4_HSP; |
| 905 | if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| 906 | cicr4 |= CICR4_VSP; |
| 907 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 908 | __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4); |
| 909 | |
| 910 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 911 | /* Initialise the timeout under the assumption pclk = mclk */ |
| 912 | recalculate_fifo_timeout(pcdev, pcdev->mclk); |
| 913 | else |
| 914 | /* "Safe default" - 13MHz */ |
| 915 | recalculate_fifo_timeout(pcdev, 13000000); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 916 | |
| 917 | clk_enable(pcdev->clk); |
| 918 | } |
| 919 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 920 | static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 921 | { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 922 | clk_disable(pcdev->clk); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | static irqreturn_t pxa_camera_irq(int irq, void *data) |
| 926 | { |
| 927 | struct pxa_camera_dev *pcdev = data; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 928 | unsigned long status, cicr0; |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 929 | struct pxa_buffer *buf; |
| 930 | struct videobuf_buffer *vb; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 931 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 932 | status = __raw_readl(pcdev->base + CISR); |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 933 | dev_dbg(pcdev->soc_host.dev, "Camera interrupt status 0x%lx\n", status); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 934 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 935 | if (!status) |
| 936 | return IRQ_NONE; |
| 937 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 938 | __raw_writel(status, pcdev->base + CISR); |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 939 | |
| 940 | if (status & CISR_EOF) { |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 941 | pcdev->active = list_first_entry(&pcdev->capture, |
| 942 | struct pxa_buffer, vb.queue); |
| 943 | vb = &pcdev->active->vb; |
| 944 | buf = container_of(vb, struct pxa_buffer, vb); |
| 945 | pxa_videobuf_set_actdma(pcdev, buf); |
| 946 | |
| 947 | pxa_dma_start_channels(pcdev); |
| 948 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 949 | cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM; |
| 950 | __raw_writel(cicr0, pcdev->base + CICR0); |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 951 | } |
| 952 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 953 | return IRQ_HANDLED; |
| 954 | } |
| 955 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 956 | /* |
| 957 | * The following two functions absolutely depend on the fact, that |
| 958 | * there can be only one camera on PXA quick capture interface |
| 959 | * Called with .video_lock held |
| 960 | */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 961 | static int pxa_camera_add_device(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 962 | { |
| 963 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 964 | struct pxa_camera_dev *pcdev = ici->priv; |
| 965 | int ret; |
| 966 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 967 | if (pcdev->icd) { |
| 968 | ret = -EBUSY; |
| 969 | goto ebusy; |
| 970 | } |
| 971 | |
| 972 | dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n", |
| 973 | icd->devnum); |
| 974 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 975 | pxa_camera_activate(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 976 | ret = icd->ops->init(icd); |
| 977 | |
| 978 | if (!ret) |
| 979 | pcdev->icd = icd; |
| 980 | |
| 981 | ebusy: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 982 | return ret; |
| 983 | } |
| 984 | |
Guennadi Liakhovetski | 1c3bb74 | 2008-12-18 12:28:54 -0300 | [diff] [blame] | 985 | /* Called with .video_lock held */ |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 986 | static void pxa_camera_remove_device(struct soc_camera_device *icd) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 987 | { |
| 988 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 989 | struct pxa_camera_dev *pcdev = ici->priv; |
| 990 | |
| 991 | BUG_ON(icd != pcdev->icd); |
| 992 | |
| 993 | dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n", |
| 994 | icd->devnum); |
| 995 | |
| 996 | /* disable capture, disable interrupts */ |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 997 | __raw_writel(0x3ff, pcdev->base + CICR0); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 998 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 999 | /* Stop DMA engine */ |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1000 | DCSR(pcdev->dma_chans[0]) = 0; |
| 1001 | DCSR(pcdev->dma_chans[1]) = 0; |
| 1002 | DCSR(pcdev->dma_chans[2]) = 0; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1003 | |
| 1004 | icd->ops->release(icd); |
| 1005 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1006 | pxa_camera_deactivate(pcdev); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1007 | |
| 1008 | pcdev->icd = NULL; |
| 1009 | } |
| 1010 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1011 | static int test_platform_param(struct pxa_camera_dev *pcdev, |
| 1012 | unsigned char buswidth, unsigned long *flags) |
| 1013 | { |
| 1014 | /* |
| 1015 | * Platform specified synchronization and pixel clock polarities are |
| 1016 | * only a recommendation and are only used during probing. The PXA270 |
| 1017 | * quick capture interface supports both. |
| 1018 | */ |
| 1019 | *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| 1020 | SOCAM_MASTER : SOCAM_SLAVE) | |
| 1021 | SOCAM_HSYNC_ACTIVE_HIGH | |
| 1022 | SOCAM_HSYNC_ACTIVE_LOW | |
| 1023 | SOCAM_VSYNC_ACTIVE_HIGH | |
| 1024 | SOCAM_VSYNC_ACTIVE_LOW | |
Guennadi Liakhovetski | 2d9329f | 2009-02-23 12:12:58 -0300 | [diff] [blame] | 1025 | SOCAM_DATA_ACTIVE_HIGH | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1026 | SOCAM_PCLK_SAMPLE_RISING | |
| 1027 | SOCAM_PCLK_SAMPLE_FALLING; |
| 1028 | |
| 1029 | /* If requested data width is supported by the platform, use it */ |
| 1030 | switch (buswidth) { |
| 1031 | case 10: |
| 1032 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10)) |
| 1033 | return -EINVAL; |
| 1034 | *flags |= SOCAM_DATAWIDTH_10; |
| 1035 | break; |
| 1036 | case 9: |
| 1037 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9)) |
| 1038 | return -EINVAL; |
| 1039 | *flags |= SOCAM_DATAWIDTH_9; |
| 1040 | break; |
| 1041 | case 8: |
| 1042 | if (!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8)) |
| 1043 | return -EINVAL; |
| 1044 | *flags |= SOCAM_DATAWIDTH_8; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1045 | break; |
| 1046 | default: |
| 1047 | return -EINVAL; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1048 | } |
| 1049 | |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | 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] | 1054 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1055 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1056 | struct pxa_camera_dev *pcdev = ici->priv; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1057 | unsigned long dw, bpp, bus_flags, camera_flags, common_flags; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1058 | u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1059 | int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1060 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1061 | if (ret < 0) |
| 1062 | return ret; |
| 1063 | |
| 1064 | camera_flags = icd->ops->query_bus_param(icd); |
| 1065 | |
| 1066 | common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags); |
| 1067 | if (!common_flags) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1068 | return -EINVAL; |
| 1069 | |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 1070 | pcdev->channels = 1; |
| 1071 | |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1072 | /* Make choises, based on platform preferences */ |
| 1073 | if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) && |
| 1074 | (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) { |
| 1075 | if (pcdev->platform_flags & PXA_CAMERA_HSP) |
| 1076 | common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH; |
| 1077 | else |
| 1078 | common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW; |
| 1079 | } |
| 1080 | |
| 1081 | if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) && |
| 1082 | (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) { |
| 1083 | if (pcdev->platform_flags & PXA_CAMERA_VSP) |
| 1084 | common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH; |
| 1085 | else |
| 1086 | common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW; |
| 1087 | } |
| 1088 | |
| 1089 | if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) && |
| 1090 | (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) { |
| 1091 | if (pcdev->platform_flags & PXA_CAMERA_PCP) |
| 1092 | common_flags &= ~SOCAM_PCLK_SAMPLE_RISING; |
| 1093 | else |
| 1094 | common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING; |
| 1095 | } |
| 1096 | |
| 1097 | ret = icd->ops->set_bus_param(icd, common_flags); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1098 | if (ret < 0) |
| 1099 | return ret; |
| 1100 | |
| 1101 | /* Datawidth is now guaranteed to be equal to one of the three values. |
| 1102 | * We fix bit-per-pixel equal to data-width... */ |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1103 | switch (common_flags & SOCAM_DATAWIDTH_MASK) { |
| 1104 | case SOCAM_DATAWIDTH_10: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1105 | dw = 4; |
| 1106 | bpp = 0x40; |
| 1107 | break; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1108 | case SOCAM_DATAWIDTH_9: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1109 | dw = 3; |
| 1110 | bpp = 0x20; |
| 1111 | break; |
| 1112 | default: |
| 1113 | /* Actually it can only be 8 now, |
| 1114 | * default is just to silence compiler warnings */ |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1115 | case SOCAM_DATAWIDTH_8: |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1116 | dw = 2; |
| 1117 | bpp = 0; |
| 1118 | } |
| 1119 | |
| 1120 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1121 | cicr4 |= CICR4_PCLK_EN; |
| 1122 | if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN) |
| 1123 | cicr4 |= CICR4_MCLK_EN; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1124 | if (common_flags & SOCAM_PCLK_SAMPLE_FALLING) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1125 | cicr4 |= CICR4_PCP; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1126 | if (common_flags & SOCAM_HSYNC_ACTIVE_LOW) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1127 | cicr4 |= CICR4_HSP; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1128 | if (common_flags & SOCAM_VSYNC_ACTIVE_LOW) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1129 | cicr4 |= CICR4_VSP; |
| 1130 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1131 | cicr0 = __raw_readl(pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1132 | if (cicr0 & CICR0_ENB) |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1133 | __raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1134 | |
| 1135 | cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw; |
| 1136 | |
| 1137 | switch (pixfmt) { |
| 1138 | case V4L2_PIX_FMT_YUV422P: |
Guennadi Liakhovetski | e7c5068 | 2008-04-22 10:37:49 -0300 | [diff] [blame] | 1139 | pcdev->channels = 3; |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1140 | cicr1 |= CICR1_YCBCR_F; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1141 | /* |
| 1142 | * Normally, pxa bus wants as input UYVY format. We allow all |
| 1143 | * reorderings of the YUV422 format, as no processing is done, |
| 1144 | * and the YUV stream is just passed through without any |
| 1145 | * transformation. Note that UYVY is the only format that |
| 1146 | * should be used if pxa framebuffer Overlay2 is used. |
| 1147 | */ |
| 1148 | case V4L2_PIX_FMT_UYVY: |
| 1149 | case V4L2_PIX_FMT_VYUY: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1150 | case V4L2_PIX_FMT_YUYV: |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1151 | case V4L2_PIX_FMT_YVYU: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1152 | cicr1 |= CICR1_COLOR_SP_VAL(2); |
| 1153 | break; |
| 1154 | case V4L2_PIX_FMT_RGB555: |
| 1155 | cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) | |
| 1156 | CICR1_TBIT | CICR1_COLOR_SP_VAL(1); |
| 1157 | break; |
| 1158 | case V4L2_PIX_FMT_RGB565: |
| 1159 | cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2); |
| 1160 | break; |
| 1161 | } |
| 1162 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1163 | cicr2 = 0; |
| 1164 | cicr3 = CICR3_LPF_VAL(icd->height - 1) | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1165 | CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top)); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1166 | cicr4 |= pcdev->mclk_divisor; |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1167 | |
| 1168 | __raw_writel(cicr1, pcdev->base + CICR1); |
| 1169 | __raw_writel(cicr2, pcdev->base + CICR2); |
| 1170 | __raw_writel(cicr3, pcdev->base + CICR3); |
| 1171 | __raw_writel(cicr4, pcdev->base + CICR4); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1172 | |
| 1173 | /* CIF interrupts are not used, only DMA */ |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1174 | cicr0 = (cicr0 & CICR0_ENB) | (pcdev->platform_flags & PXA_CAMERA_MASTER ? |
| 1175 | CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP)); |
| 1176 | cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK; |
| 1177 | __raw_writel(cicr0, pcdev->base + CICR0); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1178 | |
| 1179 | return 0; |
| 1180 | } |
| 1181 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1182 | static int pxa_camera_try_bus_param(struct soc_camera_device *icd, |
| 1183 | unsigned char buswidth) |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1184 | { |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1185 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1186 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1187 | unsigned long bus_flags, camera_flags; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1188 | int ret = test_platform_param(pcdev, buswidth, &bus_flags); |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1189 | |
| 1190 | if (ret < 0) |
| 1191 | return ret; |
| 1192 | |
| 1193 | camera_flags = icd->ops->query_bus_param(icd); |
| 1194 | |
| 1195 | return soc_camera_bus_param_compatible(camera_flags, bus_flags) ? 0 : -EINVAL; |
| 1196 | } |
| 1197 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1198 | static const struct soc_camera_data_format pxa_camera_formats[] = { |
| 1199 | { |
| 1200 | .name = "Planar YUV422 16 bit", |
| 1201 | .depth = 16, |
| 1202 | .fourcc = V4L2_PIX_FMT_YUV422P, |
| 1203 | .colorspace = V4L2_COLORSPACE_JPEG, |
| 1204 | }, |
| 1205 | }; |
| 1206 | |
| 1207 | static bool buswidth_supported(struct soc_camera_device *icd, int depth) |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1208 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1209 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1210 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1211 | |
| 1212 | switch (depth) { |
| 1213 | case 8: |
| 1214 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_8); |
| 1215 | case 9: |
| 1216 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_9); |
| 1217 | case 10: |
| 1218 | return !!(pcdev->platform_flags & PXA_CAMERA_DATAWIDTH_10); |
| 1219 | } |
| 1220 | return false; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1221 | } |
| 1222 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1223 | static int required_buswidth(const struct soc_camera_data_format *fmt) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1224 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1225 | switch (fmt->fourcc) { |
| 1226 | case V4L2_PIX_FMT_UYVY: |
| 1227 | case V4L2_PIX_FMT_VYUY: |
| 1228 | case V4L2_PIX_FMT_YUYV: |
| 1229 | case V4L2_PIX_FMT_YVYU: |
| 1230 | case V4L2_PIX_FMT_RGB565: |
| 1231 | case V4L2_PIX_FMT_RGB555: |
| 1232 | return 8; |
| 1233 | default: |
| 1234 | return fmt->depth; |
| 1235 | } |
| 1236 | } |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1237 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1238 | static int pxa_camera_get_formats(struct soc_camera_device *icd, int idx, |
| 1239 | struct soc_camera_format_xlate *xlate) |
| 1240 | { |
| 1241 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1242 | int formats = 0, buswidth, ret; |
| 1243 | |
| 1244 | buswidth = required_buswidth(icd->formats + idx); |
| 1245 | |
| 1246 | if (!buswidth_supported(icd, buswidth)) |
| 1247 | return 0; |
| 1248 | |
| 1249 | ret = pxa_camera_try_bus_param(icd, buswidth); |
| 1250 | if (ret < 0) |
| 1251 | return 0; |
| 1252 | |
| 1253 | switch (icd->formats[idx].fourcc) { |
| 1254 | case V4L2_PIX_FMT_UYVY: |
| 1255 | formats++; |
| 1256 | if (xlate) { |
| 1257 | xlate->host_fmt = &pxa_camera_formats[0]; |
| 1258 | xlate->cam_fmt = icd->formats + idx; |
| 1259 | xlate->buswidth = buswidth; |
| 1260 | xlate++; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1261 | dev_dbg(ici->dev, "Providing format %s using %s\n", |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1262 | pxa_camera_formats[0].name, |
| 1263 | icd->formats[idx].name); |
| 1264 | } |
| 1265 | case V4L2_PIX_FMT_VYUY: |
| 1266 | case V4L2_PIX_FMT_YUYV: |
| 1267 | case V4L2_PIX_FMT_YVYU: |
| 1268 | case V4L2_PIX_FMT_RGB565: |
| 1269 | case V4L2_PIX_FMT_RGB555: |
| 1270 | formats++; |
| 1271 | if (xlate) { |
| 1272 | xlate->host_fmt = icd->formats + idx; |
| 1273 | xlate->cam_fmt = icd->formats + idx; |
| 1274 | xlate->buswidth = buswidth; |
| 1275 | xlate++; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1276 | dev_dbg(ici->dev, "Providing format %s packed\n", |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1277 | icd->formats[idx].name); |
| 1278 | } |
| 1279 | break; |
| 1280 | default: |
| 1281 | /* Generic pass-through */ |
| 1282 | formats++; |
| 1283 | if (xlate) { |
| 1284 | xlate->host_fmt = icd->formats + idx; |
| 1285 | xlate->cam_fmt = icd->formats + idx; |
| 1286 | xlate->buswidth = icd->formats[idx].depth; |
| 1287 | xlate++; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1288 | dev_dbg(ici->dev, |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1289 | "Providing format %s in pass-through mode\n", |
| 1290 | icd->formats[idx].name); |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | return formats; |
| 1295 | } |
| 1296 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1297 | static int pxa_camera_set_crop(struct soc_camera_device *icd, |
| 1298 | struct v4l2_rect *rect) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1299 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1300 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1301 | struct pxa_camera_dev *pcdev = ici->priv; |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1302 | struct soc_camera_sense sense = { |
| 1303 | .master_clock = pcdev->mclk, |
| 1304 | .pixel_clock_max = pcdev->ciclk / 4, |
| 1305 | }; |
Guennadi Liakhovetski | 0ad675e | 2009-02-23 12:11:25 -0300 | [diff] [blame] | 1306 | int ret; |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1307 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1308 | /* If PCLK is used to latch data from the sensor, check sense */ |
| 1309 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1310 | icd->sense = &sense; |
| 1311 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1312 | ret = icd->ops->set_crop(icd, rect); |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1313 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1314 | icd->sense = NULL; |
| 1315 | |
| 1316 | if (ret < 0) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1317 | dev_warn(ici->dev, "Failed to crop to %ux%u@%u:%u\n", |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1318 | rect->width, rect->height, rect->left, rect->top); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1319 | } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| 1320 | if (sense.pixel_clock > sense.pixel_clock_max) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1321 | dev_err(ici->dev, |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1322 | "pixel clock %lu set by the camera too high!", |
| 1323 | sense.pixel_clock); |
| 1324 | return -EIO; |
| 1325 | } |
| 1326 | recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| 1327 | } |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1328 | |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1329 | return ret; |
| 1330 | } |
| 1331 | |
| 1332 | static int pxa_camera_set_fmt(struct soc_camera_device *icd, |
| 1333 | struct v4l2_format *f) |
| 1334 | { |
| 1335 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1336 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1337 | const struct soc_camera_data_format *cam_fmt = NULL; |
| 1338 | const struct soc_camera_format_xlate *xlate = NULL; |
| 1339 | struct soc_camera_sense sense = { |
| 1340 | .master_clock = pcdev->mclk, |
| 1341 | .pixel_clock_max = pcdev->ciclk / 4, |
| 1342 | }; |
| 1343 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1344 | struct v4l2_format cam_f = *f; |
| 1345 | int ret; |
| 1346 | |
| 1347 | xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat); |
| 1348 | if (!xlate) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1349 | dev_warn(ici->dev, "Format %x not found\n", pix->pixelformat); |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1350 | return -EINVAL; |
| 1351 | } |
| 1352 | |
| 1353 | cam_fmt = xlate->cam_fmt; |
| 1354 | |
| 1355 | /* If PCLK is used to latch data from the sensor, check sense */ |
| 1356 | if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN) |
| 1357 | icd->sense = &sense; |
| 1358 | |
| 1359 | cam_f.fmt.pix.pixelformat = cam_fmt->fourcc; |
| 1360 | ret = icd->ops->set_fmt(icd, &cam_f); |
| 1361 | |
| 1362 | icd->sense = NULL; |
| 1363 | |
| 1364 | if (ret < 0) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1365 | dev_warn(ici->dev, "Failed to configure for format %x\n", |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1366 | pix->pixelformat); |
| 1367 | } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) { |
| 1368 | if (sense.pixel_clock > sense.pixel_clock_max) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1369 | dev_err(ici->dev, |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1370 | "pixel clock %lu set by the camera too high!", |
| 1371 | sense.pixel_clock); |
| 1372 | return -EIO; |
| 1373 | } |
| 1374 | recalculate_fifo_timeout(pcdev, sense.pixel_clock); |
| 1375 | } |
| 1376 | |
| 1377 | if (!ret) { |
Guennadi Liakhovetski | 0ad675e | 2009-02-23 12:11:25 -0300 | [diff] [blame] | 1378 | icd->buswidth = xlate->buswidth; |
| 1379 | icd->current_fmt = xlate->host_fmt; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1380 | } |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1381 | |
| 1382 | return ret; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1383 | } |
| 1384 | |
Guennadi Liakhovetski | d8fac21 | 2008-12-01 09:45:21 -0300 | [diff] [blame] | 1385 | static int pxa_camera_try_fmt(struct soc_camera_device *icd, |
| 1386 | struct v4l2_format *f) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1387 | { |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1388 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
| 1389 | const struct soc_camera_format_xlate *xlate; |
| 1390 | struct v4l2_pix_format *pix = &f->fmt.pix; |
| 1391 | __u32 pixfmt = pix->pixelformat; |
Guennadi Liakhovetski | 06daa1a | 2008-12-18 12:52:08 -0300 | [diff] [blame] | 1392 | enum v4l2_field field; |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1393 | int ret; |
Guennadi Liakhovetski | a2c8c68 | 2008-12-01 09:44:53 -0300 | [diff] [blame] | 1394 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1395 | xlate = soc_camera_xlate_by_fourcc(icd, pixfmt); |
| 1396 | if (!xlate) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1397 | dev_warn(ici->dev, "Format %x not found\n", pixfmt); |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1398 | return -EINVAL; |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1399 | } |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1400 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1401 | /* limit to pxa hardware capabilities */ |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1402 | if (pix->height < 32) |
| 1403 | pix->height = 32; |
| 1404 | if (pix->height > 2048) |
| 1405 | pix->height = 2048; |
| 1406 | if (pix->width < 48) |
| 1407 | pix->width = 48; |
| 1408 | if (pix->width > 2048) |
| 1409 | pix->width = 2048; |
| 1410 | pix->width &= ~0x01; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1411 | |
Robert Jarzmik | 92a8337 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 1412 | /* |
| 1413 | * YUV422P planar format requires images size to be a 16 bytes |
| 1414 | * multiple. If not, zeros will be inserted between Y and U planes, and |
| 1415 | * U and V planes, and YUV422P standard would be violated. |
| 1416 | */ |
| 1417 | if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P) { |
| 1418 | if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) |
| 1419 | pix->height = ALIGN(pix->height, YUV422P_X_Y_ALIGN); |
| 1420 | if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN)) |
| 1421 | pix->width = ALIGN(pix->width, YUV422P_X_Y_ALIGN); |
| 1422 | } |
| 1423 | |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1424 | pix->bytesperline = pix->width * |
| 1425 | DIV_ROUND_UP(xlate->host_fmt->depth, 8); |
| 1426 | pix->sizeimage = pix->height * pix->bytesperline; |
Guennadi Liakhovetski | 25c4d74 | 2008-12-01 09:44:59 -0300 | [diff] [blame] | 1427 | |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1428 | /* camera has to see its format, but the user the original one */ |
| 1429 | pix->pixelformat = xlate->cam_fmt->fourcc; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1430 | /* limit to sensor capabilities */ |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1431 | ret = icd->ops->try_fmt(icd, f); |
| 1432 | pix->pixelformat = xlate->host_fmt->fourcc; |
| 1433 | |
Guennadi Liakhovetski | 06daa1a | 2008-12-18 12:52:08 -0300 | [diff] [blame] | 1434 | field = pix->field; |
| 1435 | |
| 1436 | if (field == V4L2_FIELD_ANY) { |
| 1437 | pix->field = V4L2_FIELD_NONE; |
| 1438 | } else if (field != V4L2_FIELD_NONE) { |
| 1439 | dev_err(&icd->dev, "Field type %d unsupported.\n", field); |
| 1440 | return -EINVAL; |
| 1441 | } |
| 1442 | |
Guennadi Liakhovetski | bf50715 | 2008-12-18 11:53:51 -0300 | [diff] [blame] | 1443 | return ret; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1444 | } |
| 1445 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1446 | static int pxa_camera_reqbufs(struct soc_camera_file *icf, |
| 1447 | struct v4l2_requestbuffers *p) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1448 | { |
| 1449 | int i; |
| 1450 | |
| 1451 | /* This is for locking debugging only. I removed spinlocks and now I |
| 1452 | * check whether .prepare is ever called on a linked buffer, or whether |
| 1453 | * a dma IRQ can occur for an in-work or unlinked buffer. Until now |
| 1454 | * it hadn't triggered */ |
| 1455 | for (i = 0; i < p->count; i++) { |
| 1456 | struct pxa_buffer *buf = container_of(icf->vb_vidq.bufs[i], |
| 1457 | struct pxa_buffer, vb); |
| 1458 | buf->inwork = 0; |
| 1459 | INIT_LIST_HEAD(&buf->vb.queue); |
| 1460 | } |
| 1461 | |
| 1462 | return 0; |
| 1463 | } |
| 1464 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1465 | static unsigned int pxa_camera_poll(struct file *file, poll_table *pt) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1466 | { |
| 1467 | struct soc_camera_file *icf = file->private_data; |
| 1468 | struct pxa_buffer *buf; |
| 1469 | |
| 1470 | buf = list_entry(icf->vb_vidq.stream.next, struct pxa_buffer, |
| 1471 | vb.stream); |
| 1472 | |
| 1473 | poll_wait(file, &buf->vb.done, pt); |
| 1474 | |
| 1475 | if (buf->vb.state == VIDEOBUF_DONE || |
| 1476 | buf->vb.state == VIDEOBUF_ERROR) |
| 1477 | return POLLIN|POLLRDNORM; |
| 1478 | |
| 1479 | return 0; |
| 1480 | } |
| 1481 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1482 | static int pxa_camera_querycap(struct soc_camera_host *ici, |
| 1483 | struct v4l2_capability *cap) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1484 | { |
| 1485 | /* cap->name is set by the firendly caller:-> */ |
| 1486 | strlcpy(cap->card, pxa_cam_driver_description, sizeof(cap->card)); |
| 1487 | cap->version = PXA_CAM_VERSION_CODE; |
| 1488 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; |
| 1489 | |
| 1490 | return 0; |
| 1491 | } |
| 1492 | |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1493 | static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state) |
| 1494 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1495 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1496 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1497 | int i = 0, ret = 0; |
| 1498 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1499 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR0); |
| 1500 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR1); |
| 1501 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR2); |
| 1502 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3); |
| 1503 | pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1504 | |
| 1505 | if ((pcdev->icd) && (pcdev->icd->ops->suspend)) |
| 1506 | ret = pcdev->icd->ops->suspend(pcdev->icd, state); |
| 1507 | |
| 1508 | return ret; |
| 1509 | } |
| 1510 | |
| 1511 | static int pxa_camera_resume(struct soc_camera_device *icd) |
| 1512 | { |
Guennadi Liakhovetski | 64f5905 | 2008-12-18 11:51:55 -0300 | [diff] [blame] | 1513 | struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1514 | struct pxa_camera_dev *pcdev = ici->priv; |
| 1515 | int i = 0, ret = 0; |
| 1516 | |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 1517 | DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| 1518 | DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| 1519 | DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1520 | |
Eric Miao | 5ca11fa | 2008-12-18 11:15:50 -0300 | [diff] [blame] | 1521 | __raw_writel(pcdev->save_cicr[i++] & ~CICR0_ENB, pcdev->base + CICR0); |
| 1522 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR1); |
| 1523 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR2); |
| 1524 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3); |
| 1525 | __raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1526 | |
| 1527 | if ((pcdev->icd) && (pcdev->icd->ops->resume)) |
| 1528 | ret = pcdev->icd->ops->resume(pcdev->icd); |
| 1529 | |
| 1530 | /* Restart frame capture if active buffer exists */ |
Robert Jarzmik | 256b023 | 2009-03-31 03:44:21 -0300 | [diff] [blame] | 1531 | if (!ret && pcdev->active) |
| 1532 | pxa_camera_start_capture(pcdev); |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1533 | |
| 1534 | return ret; |
| 1535 | } |
| 1536 | |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1537 | static struct soc_camera_host_ops pxa_soc_camera_host_ops = { |
| 1538 | .owner = THIS_MODULE, |
| 1539 | .add = pxa_camera_add_device, |
| 1540 | .remove = pxa_camera_remove_device, |
Robert Jarzmik | 3f6ac49 | 2008-08-02 07:10:04 -0300 | [diff] [blame] | 1541 | .suspend = pxa_camera_suspend, |
| 1542 | .resume = pxa_camera_resume, |
Guennadi Liakhovetski | 09e231b | 2009-03-13 06:08:20 -0300 | [diff] [blame] | 1543 | .set_crop = pxa_camera_set_crop, |
Robert Jarzmik | 2a48fc7 | 2008-12-01 09:45:35 -0300 | [diff] [blame] | 1544 | .get_formats = pxa_camera_get_formats, |
Guennadi Liakhovetski | d8fac21 | 2008-12-01 09:45:21 -0300 | [diff] [blame] | 1545 | .set_fmt = pxa_camera_set_fmt, |
| 1546 | .try_fmt = pxa_camera_try_fmt, |
Paulius Zaleckas | 092d392 | 2008-07-11 20:50:31 -0300 | [diff] [blame] | 1547 | .init_videobuf = pxa_camera_init_videobuf, |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1548 | .reqbufs = pxa_camera_reqbufs, |
| 1549 | .poll = pxa_camera_poll, |
| 1550 | .querycap = pxa_camera_querycap, |
Guennadi Liakhovetski | b8d9904 | 2008-04-04 13:41:25 -0300 | [diff] [blame] | 1551 | .set_bus_param = pxa_camera_set_bus_param, |
| 1552 | }; |
| 1553 | |
Jean Delvare | e36bc31 | 2009-06-04 11:07:16 -0300 | [diff] [blame] | 1554 | static int __devinit pxa_camera_probe(struct platform_device *pdev) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1555 | { |
| 1556 | struct pxa_camera_dev *pcdev; |
| 1557 | struct resource *res; |
| 1558 | void __iomem *base; |
Guennadi Liakhovetski | 02da465 | 2008-06-13 09:03:45 -0300 | [diff] [blame] | 1559 | int irq; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1560 | int err = 0; |
| 1561 | |
| 1562 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1563 | irq = platform_get_irq(pdev, 0); |
Guennadi Liakhovetski | 02da465 | 2008-06-13 09:03:45 -0300 | [diff] [blame] | 1564 | if (!res || irq < 0) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1565 | err = -ENODEV; |
| 1566 | goto exit; |
| 1567 | } |
| 1568 | |
| 1569 | pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL); |
| 1570 | if (!pcdev) { |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1571 | dev_err(&pdev->dev, "Could not allocate pcdev\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1572 | err = -ENOMEM; |
| 1573 | goto exit; |
| 1574 | } |
| 1575 | |
Russell King | e0d8b13 | 2008-11-11 17:52:32 +0000 | [diff] [blame] | 1576 | pcdev->clk = clk_get(&pdev->dev, NULL); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1577 | if (IS_ERR(pcdev->clk)) { |
| 1578 | err = PTR_ERR(pcdev->clk); |
| 1579 | goto exit_kfree; |
| 1580 | } |
| 1581 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1582 | pcdev->res = res; |
| 1583 | |
| 1584 | pcdev->pdata = pdev->dev.platform_data; |
| 1585 | pcdev->platform_flags = pcdev->pdata->flags; |
Guennadi Liakhovetski | ad5f2e8 | 2008-03-07 21:57:18 -0300 | [diff] [blame] | 1586 | if (!(pcdev->platform_flags & (PXA_CAMERA_DATAWIDTH_8 | |
| 1587 | PXA_CAMERA_DATAWIDTH_9 | PXA_CAMERA_DATAWIDTH_10))) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1588 | /* Platform hasn't set available data widths. This is bad. |
| 1589 | * Warn and use a default. */ |
| 1590 | dev_warn(&pdev->dev, "WARNING! Platform hasn't set available " |
| 1591 | "data widths, using default 10 bit\n"); |
| 1592 | pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10; |
| 1593 | } |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1594 | pcdev->mclk = pcdev->pdata->mclk_10khz * 10000; |
| 1595 | if (!pcdev->mclk) { |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1596 | dev_warn(&pdev->dev, |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1597 | "mclk == 0! Please, fix your platform data. " |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1598 | "Using default 20MHz\n"); |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1599 | pcdev->mclk = 20000000; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1600 | } |
| 1601 | |
Guennadi Liakhovetski | cf34cba | 2008-12-18 11:38:03 -0300 | [diff] [blame] | 1602 | pcdev->mclk_divisor = mclk_get_divisor(pcdev); |
| 1603 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1604 | INIT_LIST_HEAD(&pcdev->capture); |
| 1605 | spin_lock_init(&pcdev->lock); |
| 1606 | |
| 1607 | /* |
| 1608 | * Request the regions. |
| 1609 | */ |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1610 | if (!request_mem_region(res->start, resource_size(res), |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1611 | PXA_CAM_DRV_NAME)) { |
| 1612 | err = -EBUSY; |
| 1613 | goto exit_clk; |
| 1614 | } |
| 1615 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1616 | base = ioremap(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1617 | if (!base) { |
| 1618 | err = -ENOMEM; |
| 1619 | goto exit_release; |
| 1620 | } |
| 1621 | pcdev->irq = irq; |
| 1622 | pcdev->base = base; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1623 | |
| 1624 | /* request dma */ |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1625 | err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH, |
| 1626 | pxa_camera_dma_irq_y, pcdev); |
| 1627 | if (err < 0) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1628 | dev_err(&pdev->dev, "Can't request DMA for Y\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1629 | goto exit_iounmap; |
| 1630 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1631 | pcdev->dma_chans[0] = err; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1632 | dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1633 | |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1634 | err = pxa_request_dma("CI_U", DMA_PRIO_HIGH, |
| 1635 | pxa_camera_dma_irq_u, pcdev); |
| 1636 | if (err < 0) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1637 | dev_err(&pdev->dev, "Can't request DMA for U\n"); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1638 | goto exit_free_dma_y; |
| 1639 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1640 | pcdev->dma_chans[1] = err; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1641 | dev_dbg(&pdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1642 | |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1643 | err = pxa_request_dma("CI_V", DMA_PRIO_HIGH, |
| 1644 | pxa_camera_dma_irq_v, pcdev); |
| 1645 | if (err < 0) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1646 | dev_err(&pdev->dev, "Can't request DMA for V\n"); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1647 | goto exit_free_dma_u; |
| 1648 | } |
roel kluin | de3e3b8 | 2008-09-18 17:50:15 -0300 | [diff] [blame] | 1649 | pcdev->dma_chans[2] = err; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1650 | dev_dbg(&pdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]); |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1651 | |
Eric Miao | 87f3dd7 | 2008-09-08 15:26:43 +0800 | [diff] [blame] | 1652 | DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD; |
| 1653 | DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD; |
| 1654 | DRCMR(70) = pcdev->dma_chans[2] | DRCMR_MAPVLD; |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1655 | |
| 1656 | /* request irq */ |
| 1657 | err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME, |
| 1658 | pcdev); |
| 1659 | if (err) { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1660 | dev_err(&pdev->dev, "Camera interrupt register failed \n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1661 | goto exit_free_dma; |
| 1662 | } |
| 1663 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1664 | pcdev->soc_host.drv_name = PXA_CAM_DRV_NAME; |
| 1665 | pcdev->soc_host.ops = &pxa_soc_camera_host_ops; |
| 1666 | pcdev->soc_host.priv = pcdev; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1667 | pcdev->soc_host.dev = &pdev->dev; |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1668 | pcdev->soc_host.nr = pdev->id; |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1669 | |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1670 | err = soc_camera_host_register(&pcdev->soc_host); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1671 | if (err) |
| 1672 | goto exit_free_irq; |
| 1673 | |
| 1674 | return 0; |
| 1675 | |
| 1676 | exit_free_irq: |
| 1677 | free_irq(pcdev->irq, pcdev); |
| 1678 | exit_free_dma: |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1679 | pxa_free_dma(pcdev->dma_chans[2]); |
| 1680 | exit_free_dma_u: |
| 1681 | pxa_free_dma(pcdev->dma_chans[1]); |
| 1682 | exit_free_dma_y: |
| 1683 | pxa_free_dma(pcdev->dma_chans[0]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1684 | exit_iounmap: |
| 1685 | iounmap(base); |
| 1686 | exit_release: |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1687 | release_mem_region(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1688 | exit_clk: |
| 1689 | clk_put(pcdev->clk); |
| 1690 | exit_kfree: |
| 1691 | kfree(pcdev); |
| 1692 | exit: |
| 1693 | return err; |
| 1694 | } |
| 1695 | |
| 1696 | static int __devexit pxa_camera_remove(struct platform_device *pdev) |
| 1697 | { |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1698 | struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev); |
| 1699 | struct pxa_camera_dev *pcdev = container_of(soc_host, |
| 1700 | struct pxa_camera_dev, soc_host); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1701 | struct resource *res; |
| 1702 | |
| 1703 | clk_put(pcdev->clk); |
| 1704 | |
Mike Rapoport | a5462e5 | 2008-04-22 10:36:32 -0300 | [diff] [blame] | 1705 | pxa_free_dma(pcdev->dma_chans[0]); |
| 1706 | pxa_free_dma(pcdev->dma_chans[1]); |
| 1707 | pxa_free_dma(pcdev->dma_chans[2]); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1708 | free_irq(pcdev->irq, pcdev); |
| 1709 | |
Guennadi Liakhovetski | eff505f | 2009-04-24 12:55:48 -0300 | [diff] [blame] | 1710 | soc_camera_host_unregister(soc_host); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1711 | |
| 1712 | iounmap(pcdev->base); |
| 1713 | |
| 1714 | res = pcdev->res; |
Guennadi Liakhovetski | eb6c855 | 2009-04-24 12:55:18 -0300 | [diff] [blame] | 1715 | release_mem_region(res->start, resource_size(res)); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1716 | |
| 1717 | kfree(pcdev); |
| 1718 | |
Guennadi Liakhovetski | 7102b77 | 2008-04-15 02:57:48 -0300 | [diff] [blame] | 1719 | dev_info(&pdev->dev, "PXA Camera driver unloaded\n"); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1720 | |
| 1721 | return 0; |
| 1722 | } |
| 1723 | |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1724 | static struct platform_driver pxa_camera_driver = { |
| 1725 | .driver = { |
| 1726 | .name = PXA_CAM_DRV_NAME, |
| 1727 | }, |
| 1728 | .probe = pxa_camera_probe, |
Jean Delvare | e36bc31 | 2009-06-04 11:07:16 -0300 | [diff] [blame] | 1729 | .remove = __devexit_p(pxa_camera_remove), |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1730 | }; |
| 1731 | |
| 1732 | |
Jean Delvare | e36bc31 | 2009-06-04 11:07:16 -0300 | [diff] [blame] | 1733 | static int __init pxa_camera_init(void) |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1734 | { |
| 1735 | return platform_driver_register(&pxa_camera_driver); |
| 1736 | } |
| 1737 | |
| 1738 | static void __exit pxa_camera_exit(void) |
| 1739 | { |
Paul Mundt | 01c1e4c | 2008-08-01 19:48:51 -0300 | [diff] [blame] | 1740 | platform_driver_unregister(&pxa_camera_driver); |
Guennadi Liakhovetski | 3bc4384 | 2008-04-06 21:24:56 -0300 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | module_init(pxa_camera_init); |
| 1744 | module_exit(pxa_camera_exit); |
| 1745 | |
| 1746 | MODULE_DESCRIPTION("PXA27x SoC Camera Host driver"); |
| 1747 | MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>"); |
| 1748 | MODULE_LICENSE("GPL"); |