17 #include <linux/soc/qcom/geni-se.h>
22  * Generic Interface (GENI) Serial Engine (SE) Wrapper driver is introduced
36  * determined by the firmware loaded to the serial engine. Each SE consists
44  *   --QUP & SE Clocks-->         | Serial Engine N            |  +-IO------>
54  *   <------SE IRQ------+    +----------------------------+       |
70  * GENI SE Wrapper driver is structured into 2 parts:
116 /* Common SE registers */
192  * @se:	Pointer to the corresponding serial engine.
196 u32 geni_se_get_qup_hw_version(struct geni_se *se)  in geni_se_get_qup_hw_version()  argument
198 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_get_qup_hw_version()
237 static void geni_se_irq_clear(struct geni_se *se)  in geni_se_irq_clear()  argument
239 	writel_relaxed(0, se->base + SE_GSI_EVENT_EN);  in geni_se_irq_clear()
240 	writel_relaxed(0xffffffff, se->base + SE_GENI_M_IRQ_CLEAR);  in geni_se_irq_clear()
241 	writel_relaxed(0xffffffff, se->base + SE_GENI_S_IRQ_CLEAR);  in geni_se_irq_clear()
242 	writel_relaxed(0xffffffff, se->base + SE_DMA_TX_IRQ_CLR);  in geni_se_irq_clear()
243 	writel_relaxed(0xffffffff, se->base + SE_DMA_RX_IRQ_CLR);  in geni_se_irq_clear()
244 	writel_relaxed(0xffffffff, se->base + SE_IRQ_EN);  in geni_se_irq_clear()
249  * @se:		Pointer to the concerned serial engine.
256 void geni_se_init(struct geni_se *se, u32 rx_wm, u32 rx_rfr)  in geni_se_init()  argument
260 	geni_se_irq_clear(se);  in geni_se_init()
261 	geni_se_io_init(se->base);  in geni_se_init()
262 	geni_se_io_set_mode(se->base);  in geni_se_init()
264 	writel_relaxed(rx_wm, se->base + SE_GENI_RX_WATERMARK_REG);  in geni_se_init()
265 	writel_relaxed(rx_rfr, se->base + SE_GENI_RX_RFR_WATERMARK_REG);  in geni_se_init()
267 	val = readl_relaxed(se->base + SE_GENI_M_IRQ_EN);  in geni_se_init()
269 	writel_relaxed(val, se->base + SE_GENI_M_IRQ_EN);  in geni_se_init()
271 	val = readl_relaxed(se->base + SE_GENI_S_IRQ_EN);  in geni_se_init()
273 	writel_relaxed(val, se->base + SE_GENI_S_IRQ_EN);  in geni_se_init()
277 static void geni_se_select_fifo_mode(struct geni_se *se)  in geni_se_select_fifo_mode()  argument
279 	u32 proto = geni_se_read_proto(se);  in geni_se_select_fifo_mode()
282 	geni_se_irq_clear(se);  in geni_se_select_fifo_mode()
287 		val_old = val = readl_relaxed(se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_fifo_mode()
291 			writel_relaxed(val, se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_fifo_mode()
294 	val_old = val = readl_relaxed(se->base + SE_GENI_DMA_MODE_EN);  in geni_se_select_fifo_mode()
297 		writel_relaxed(val, se->base + SE_GENI_DMA_MODE_EN);  in geni_se_select_fifo_mode()
300 static void geni_se_select_dma_mode(struct geni_se *se)  in geni_se_select_dma_mode()  argument
302 	u32 proto = geni_se_read_proto(se);  in geni_se_select_dma_mode()
305 	geni_se_irq_clear(se);  in geni_se_select_dma_mode()
310 		val_old = val = readl_relaxed(se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_dma_mode()
314 			writel_relaxed(val, se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_dma_mode()
317 	val_old = val = readl_relaxed(se->base + SE_GENI_DMA_MODE_EN);  in geni_se_select_dma_mode()
320 		writel_relaxed(val, se->base + SE_GENI_DMA_MODE_EN);  in geni_se_select_dma_mode()
323 static void geni_se_select_gpi_mode(struct geni_se *se)  in geni_se_select_gpi_mode()  argument
327 	geni_se_irq_clear(se);  in geni_se_select_gpi_mode()
329 	writel(0, se->base + SE_IRQ_EN);  in geni_se_select_gpi_mode()
331 	val = readl(se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_gpi_mode()
334 	writel(val, se->base + SE_GENI_M_IRQ_EN);  in geni_se_select_gpi_mode()
336 	writel(GENI_DMA_MODE_EN, se->base + SE_GENI_DMA_MODE_EN);  in geni_se_select_gpi_mode()
338 	val = readl(se->base + SE_GSI_EVENT_EN);  in geni_se_select_gpi_mode()
340 	writel(val, se->base + SE_GSI_EVENT_EN);  in geni_se_select_gpi_mode()
345  * @se:		Pointer to the concerned serial engine.
348 void geni_se_select_mode(struct geni_se *se, enum geni_se_xfer_mode mode)  in geni_se_select_mode()  argument
354 		geni_se_select_fifo_mode(se);  in geni_se_select_mode()
357 		geni_se_select_dma_mode(se);  in geni_se_select_mode()
360 		geni_se_select_gpi_mode(se);  in geni_se_select_mode()
421  * @se:		Pointer to the concerned serial engine
431 void geni_se_config_packing(struct geni_se *se, int bpw, int pack_words,  in geni_se_config_packing()  argument
466 		writel_relaxed(cfg0, se->base + SE_GENI_TX_PACKING_CFG0);  in geni_se_config_packing()
467 		writel_relaxed(cfg1, se->base + SE_GENI_TX_PACKING_CFG1);  in geni_se_config_packing()
470 		writel_relaxed(cfg0, se->base + SE_GENI_RX_PACKING_CFG0);  in geni_se_config_packing()
471 		writel_relaxed(cfg1, se->base + SE_GENI_RX_PACKING_CFG1);  in geni_se_config_packing()
482 		writel_relaxed(bpw / 16, se->base + SE_GENI_BYTE_GRAN);  in geni_se_config_packing()
486 static void geni_se_clks_off(struct geni_se *se)  in geni_se_clks_off()  argument
488 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_clks_off()
490 	clk_disable_unprepare(se->clk);  in geni_se_clks_off()
497  * @se:	Pointer to the concerned serial engine.
501 int geni_se_resources_off(struct geni_se *se)  in geni_se_resources_off()  argument
505 	if (has_acpi_companion(se->dev))  in geni_se_resources_off()
508 	ret = pinctrl_pm_select_sleep_state(se->dev);  in geni_se_resources_off()
512 	geni_se_clks_off(se);  in geni_se_resources_off()
517 static int geni_se_clks_on(struct geni_se *se)  in geni_se_clks_on()  argument
520 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_clks_on()
526 	ret = clk_prepare_enable(se->clk);  in geni_se_clks_on()
535  * @se:	Pointer to the concerned serial engine.
539 int geni_se_resources_on(struct geni_se *se)  in geni_se_resources_on()  argument
543 	if (has_acpi_companion(se->dev))  in geni_se_resources_on()
546 	ret = geni_se_clks_on(se);  in geni_se_resources_on()
550 	ret = pinctrl_pm_select_default_state(se->dev);  in geni_se_resources_on()
552 		geni_se_clks_off(se);  in geni_se_resources_on()
560  * @se:		Pointer to the concerned serial engine.
571 int geni_se_clk_tbl_get(struct geni_se *se, unsigned long **tbl)  in geni_se_clk_tbl_get()  argument
576 	if (se->clk_perf_tbl) {  in geni_se_clk_tbl_get()
577 		*tbl = se->clk_perf_tbl;  in geni_se_clk_tbl_get()
578 		return se->num_clk_levels;  in geni_se_clk_tbl_get()
581 	se->clk_perf_tbl = devm_kcalloc(se->dev, MAX_CLK_PERF_LEVEL,  in geni_se_clk_tbl_get()
582 					sizeof(*se->clk_perf_tbl),  in geni_se_clk_tbl_get()
584 	if (!se->clk_perf_tbl)  in geni_se_clk_tbl_get()
588 		freq = clk_round_rate(se->clk, freq + 1);  in geni_se_clk_tbl_get()
590 		    (i > 0 && freq == se->clk_perf_tbl[i - 1]))  in geni_se_clk_tbl_get()
592 		se->clk_perf_tbl[i] = freq;  in geni_se_clk_tbl_get()
594 	se->num_clk_levels = i;  in geni_se_clk_tbl_get()
595 	*tbl = se->clk_perf_tbl;  in geni_se_clk_tbl_get()
596 	return se->num_clk_levels;  in geni_se_clk_tbl_get()
601  * geni_se_clk_freq_match() - Get the matching or closest SE clock frequency
602  * @se:		Pointer to the concerned serial engine.
619 int geni_se_clk_freq_match(struct geni_se *se, unsigned long req_freq,  in geni_se_clk_freq_match()  argument
630 	num_clk_levels = geni_se_clk_tbl_get(se, &tbl);  in geni_se_clk_freq_match()
669  * @se:			Pointer to the concerned serial engine.
675 void geni_se_tx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len)  in geni_se_tx_init_dma()  argument
682 	writel_relaxed(val, se->base + SE_DMA_TX_IRQ_EN_SET);  in geni_se_tx_init_dma()
683 	writel_relaxed(lower_32_bits(iova), se->base + SE_DMA_TX_PTR_L);  in geni_se_tx_init_dma()
684 	writel_relaxed(upper_32_bits(iova), se->base + SE_DMA_TX_PTR_H);  in geni_se_tx_init_dma()
685 	writel_relaxed(GENI_SE_DMA_EOT_BUF, se->base + SE_DMA_TX_ATTR);  in geni_se_tx_init_dma()
686 	writel(len, se->base + SE_DMA_TX_LEN);  in geni_se_tx_init_dma()
692  * @se:			Pointer to the concerned serial engine.
701 int geni_se_tx_dma_prep(struct geni_se *se, void *buf, size_t len,  in geni_se_tx_dma_prep()  argument
704 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_tx_dma_prep()
713 	geni_se_tx_init_dma(se, *iova, len);  in geni_se_tx_dma_prep()
720  * @se:			Pointer to the concerned serial engine.
726 void geni_se_rx_init_dma(struct geni_se *se, dma_addr_t iova, size_t len)  in geni_se_rx_init_dma()  argument
733 	writel_relaxed(val, se->base + SE_DMA_RX_IRQ_EN_SET);  in geni_se_rx_init_dma()
734 	writel_relaxed(lower_32_bits(iova), se->base + SE_DMA_RX_PTR_L);  in geni_se_rx_init_dma()
735 	writel_relaxed(upper_32_bits(iova), se->base + SE_DMA_RX_PTR_H);  in geni_se_rx_init_dma()
737 	writel_relaxed(0, se->base + SE_DMA_RX_ATTR);  in geni_se_rx_init_dma()
738 	writel(len, se->base + SE_DMA_RX_LEN);  in geni_se_rx_init_dma()
744  * @se:			Pointer to the concerned serial engine.
753 int geni_se_rx_dma_prep(struct geni_se *se, void *buf, size_t len,  in geni_se_rx_dma_prep()  argument
756 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_rx_dma_prep()
765 	geni_se_rx_init_dma(se, *iova, len);  in geni_se_rx_dma_prep()
772  * @se:			Pointer to the concerned serial engine.
778 void geni_se_tx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len)  in geni_se_tx_dma_unprep()  argument
780 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_tx_dma_unprep()
789  * @se:			Pointer to the concerned serial engine.
795 void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len)  in geni_se_rx_dma_unprep()  argument
797 	struct geni_wrapper *wrapper = se->wrapper;  in geni_se_rx_dma_unprep()
804 int geni_icc_get(struct geni_se *se, const char *icc_ddr)  in geni_icc_get()  argument
809 	if (has_acpi_companion(se->dev))  in geni_icc_get()
812 	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {  in geni_icc_get()
816 		se->icc_paths[i].path = devm_of_icc_get(se->dev, icc_names[i]);  in geni_icc_get()
817 		if (IS_ERR(se->icc_paths[i].path))  in geni_icc_get()
824 	err = PTR_ERR(se->icc_paths[i].path);  in geni_icc_get()
826 		dev_err_ratelimited(se->dev, "Failed to get ICC path '%s': %d\n",  in geni_icc_get()
833 int geni_icc_set_bw(struct geni_se *se)  in geni_icc_set_bw()  argument
837 	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {  in geni_icc_set_bw()
838 		ret = icc_set_bw(se->icc_paths[i].path,  in geni_icc_set_bw()
839 			se->icc_paths[i].avg_bw, se->icc_paths[i].avg_bw);  in geni_icc_set_bw()
841 			dev_err_ratelimited(se->dev, "ICC BW voting failed on path '%s': %d\n",  in geni_icc_set_bw()
851 void geni_icc_set_tag(struct geni_se *se, u32 tag)  in geni_icc_set_tag()  argument
855 	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++)  in geni_icc_set_tag()
856 		icc_set_tag(se->icc_paths[i].path, tag);  in geni_icc_set_tag()
861 int geni_icc_enable(struct geni_se *se)  in geni_icc_enable()  argument
865 	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {  in geni_icc_enable()
866 		ret = icc_enable(se->icc_paths[i].path);  in geni_icc_enable()
868 			dev_err_ratelimited(se->dev, "ICC enable failed on path '%s': %d\n",  in geni_icc_enable()
878 int geni_icc_disable(struct geni_se *se)  in geni_icc_disable()  argument
882 	for (i = 0; i < ARRAY_SIZE(se->icc_paths); i++) {  in geni_icc_disable()
883 		ret = icc_disable(se->icc_paths[i].path);  in geni_icc_disable()
885 			dev_err_ratelimited(se->dev, "ICC disable failed on path '%s': %d\n",  in geni_icc_disable()
943 	dev_dbg(dev, "GENI SE Driver probed\n");  in geni_se_probe()
967 	{ .compatible = "qcom,geni-se-qup", .data = &qup_desc },
968 	{ .compatible = "qcom,geni-se-i2c-master-hub", .data = &i2c_master_hub_desc },