30 static void hist_reset_mem(struct ispstat *hist)  in hist_reset_mem()  argument
32 	struct isp_device *isp = hist->isp;  in hist_reset_mem()
33 	struct omap3isp_hist_config *conf = hist->priv;  in hist_reset_mem()
56 	hist->wait_acc_frames = conf->num_acc_frames;  in hist_reset_mem()
62 static void hist_setup_regs(struct ispstat *hist, void *priv)  in hist_setup_regs()  argument
64 	struct isp_device *isp = hist->isp;  in hist_setup_regs()
72 	if (!hist->update || hist->state == ISPSTAT_DISABLED ||  in hist_setup_regs()
73 	    hist->state == ISPSTAT_DISABLING)  in hist_setup_regs()
121 	hist_reset_mem(hist);  in hist_setup_regs()
134 	hist->update = 0;  in hist_setup_regs()
135 	hist->config_counter += hist->inc_config;  in hist_setup_regs()
136 	hist->inc_config = 0;  in hist_setup_regs()
137 	hist->buf_size = conf->buf_size;  in hist_setup_regs()
140 static void hist_enable(struct ispstat *hist, int enable)  in hist_enable()  argument
143 		isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,  in hist_enable()
145 		omap3isp_subclk_enable(hist->isp, OMAP3_ISP_SUBCLK_HIST);  in hist_enable()
147 		isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,  in hist_enable()
149 		omap3isp_subclk_disable(hist->isp, OMAP3_ISP_SUBCLK_HIST);  in hist_enable()
153 static int hist_busy(struct ispstat *hist)  in hist_busy()  argument
155 	return isp_reg_readl(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR)  in hist_busy()
161 	struct ispstat *hist = data;  in hist_dma_cb()  local
165 	isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,  in hist_dma_cb()
168 	omap3isp_stat_dma_isr(hist);  in hist_dma_cb()
169 	if (hist->state != ISPSTAT_DISABLED)  in hist_dma_cb()
170 		omap3isp_hist_dma_done(hist->isp);  in hist_dma_cb()
173 static int hist_buf_dma(struct ispstat *hist)  in hist_buf_dma()  argument
175 	dma_addr_t dma_addr = hist->active_buf->dma_addr;  in hist_buf_dma()
182 		dev_dbg(hist->isp->dev, "hist: invalid DMA buffer address\n");  in hist_buf_dma()
186 	isp_reg_writel(hist->isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);  in hist_buf_dma()
187 	isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,  in hist_buf_dma()
189 	omap3isp_flush(hist->isp);  in hist_buf_dma()
192 	cfg.src_addr = hist->isp->mmio_hist_base_phys + ISPHIST_DATA;  in hist_buf_dma()
194 	cfg.src_maxburst = hist->buf_size / 4;  in hist_buf_dma()
196 	ret = dmaengine_slave_config(hist->dma_ch, &cfg);  in hist_buf_dma()
198 		dev_dbg(hist->isp->dev,  in hist_buf_dma()
203 	tx = dmaengine_prep_slave_single(hist->dma_ch, dma_addr,  in hist_buf_dma()
204 					 hist->buf_size, DMA_DEV_TO_MEM,  in hist_buf_dma()
207 		dev_dbg(hist->isp->dev,  in hist_buf_dma()
213 	tx->callback_param = hist;  in hist_buf_dma()
216 		dev_dbg(hist->isp->dev, "hist: DMA submission failed\n");  in hist_buf_dma()
220 	dma_async_issue_pending(hist->dma_ch);  in hist_buf_dma()
225 	hist_reset_mem(hist);  in hist_buf_dma()
229 static int hist_buf_pio(struct ispstat *hist)  in hist_buf_pio()  argument
231 	struct isp_device *isp = hist->isp;  in hist_buf_pio()
232 	u32 *buf = hist->active_buf->virt_addr;  in hist_buf_pio()
237 		hist_reset_mem(hist);  in hist_buf_pio()
255 	for (i = hist->buf_size / 16; i > 0; i--) {  in hist_buf_pio()
261 	isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,  in hist_buf_pio()
270 static int hist_buf_process(struct ispstat *hist)  in hist_buf_process()  argument
272 	struct omap3isp_hist_config *user_cfg = hist->priv;  in hist_buf_process()
275 	if (atomic_read(&hist->buf_err) || hist->state != ISPSTAT_ENABLED) {  in hist_buf_process()
276 		hist_reset_mem(hist);  in hist_buf_process()
280 	if (--(hist->wait_acc_frames))  in hist_buf_process()
283 	if (hist->dma_ch)  in hist_buf_process()
284 		ret = hist_buf_dma(hist);  in hist_buf_process()
286 		ret = hist_buf_pio(hist);  in hist_buf_process()
288 	hist->wait_acc_frames = user_cfg->num_acc_frames;  in hist_buf_process()
304 static int hist_validate_params(struct ispstat *hist, void *new_conf)  in hist_validate_params()  argument
360 static int hist_comp_params(struct ispstat *hist,  in hist_comp_params()  argument
363 	struct omap3isp_hist_config *cur_cfg = hist->priv;  in hist_comp_params()
404 static void hist_set_params(struct ispstat *hist, void *new_conf)  in hist_set_params()  argument
407 	struct omap3isp_hist_config *cur_cfg = hist->priv;  in hist_set_params()
409 	if (!hist->configured || hist_comp_params(hist, user_cfg)) {  in hist_set_params()
413 		hist->inc_config++;  in hist_set_params()
414 		hist->update = 1;  in hist_set_params()
476 	struct ispstat *hist = &isp->isp_hist;  in omap3isp_hist_init()  local
484 	hist->isp = isp;  in omap3isp_hist_init()
498 		hist->dma_ch = dma_request_chan_by_mask(&mask);  in omap3isp_hist_init()
499 		if (IS_ERR(hist->dma_ch)) {  in omap3isp_hist_init()
500 			ret = PTR_ERR(hist->dma_ch);  in omap3isp_hist_init()
504 			hist->dma_ch = NULL;  in omap3isp_hist_init()
509 				dma_chan_name(hist->dma_ch));  in omap3isp_hist_init()
513 	hist->ops = &hist_ops;  in omap3isp_hist_init()
514 	hist->priv = hist_cfg;  in omap3isp_hist_init()
515 	hist->event_type = V4L2_EVENT_OMAP3ISP_HIST;  in omap3isp_hist_init()
517 	ret = omap3isp_stat_init(hist, "histogram", &hist_subdev_ops);  in omap3isp_hist_init()
521 		if (!IS_ERR_OR_NULL(hist->dma_ch))  in omap3isp_hist_init()
522 			dma_release_channel(hist->dma_ch);  in omap3isp_hist_init()
534 	struct ispstat *hist = &isp->isp_hist;  in omap3isp_hist_cleanup()  local
536 	if (hist->dma_ch)  in omap3isp_hist_cleanup()
537 		dma_release_channel(hist->dma_ch);  in omap3isp_hist_cleanup()
539 	omap3isp_stat_cleanup(hist);  in omap3isp_hist_cleanup()