2  * Driver for Amlogic Meson SPI flash controller (SPIFC)
97  * @spifc:	the Meson SPI device
100 static int meson_spifc_wait_ready(struct meson_spifc *spifc)  in meson_spifc_wait_ready()  argument
106 		regmap_read(spifc->regmap, REG_SLAVE, &data);  in meson_spifc_wait_ready()
117  * @spifc:	the Meson SPI device
121 static void meson_spifc_drain_buffer(struct meson_spifc *spifc, u8 *buf,  in meson_spifc_drain_buffer()  argument
128 		regmap_read(spifc->regmap, REG_C0 + i, &data);  in meson_spifc_drain_buffer()
143  * @spifc:	the Meson SPI device
147 static void meson_spifc_fill_buffer(struct meson_spifc *spifc, const u8 *buf,  in meson_spifc_fill_buffer()  argument
159 		regmap_write(spifc->regmap, REG_C0 + i, data);  in meson_spifc_fill_buffer()
168  * @spifc:	the Meson SPI device
171 static void meson_spifc_setup_speed(struct meson_spifc *spifc, u32 speed)  in meson_spifc_setup_speed()  argument
176 	parent = clk_get_rate(spifc->clk);  in meson_spifc_setup_speed()
179 	dev_dbg(spifc->dev, "parent %lu, speed %u, n %d\n", parent,  in meson_spifc_setup_speed()
187 	regmap_write(spifc->regmap, REG_CLOCK, value);  in meson_spifc_setup_speed()
192  * @spifc:	the Meson SPI device
200 static int meson_spifc_txrx(struct meson_spifc *spifc,  in meson_spifc_txrx()  argument
209 		meson_spifc_fill_buffer(spifc, xfer->tx_buf + offset, len);  in meson_spifc_txrx()
212 	regmap_update_bits(spifc->regmap, REG_USER, USER_UC_MASK,  in meson_spifc_txrx()
214 	regmap_write(spifc->regmap, REG_USER1,  in meson_spifc_txrx()
218 	regmap_update_bits(spifc->regmap, REG_USER, USER_DIN_EN_MS,  in meson_spifc_txrx()
228 	regmap_update_bits(spifc->regmap, REG_USER4, USER4_CS_ACT,  in meson_spifc_txrx()
232 	regmap_update_bits(spifc->regmap, REG_SLAVE, SLAVE_TRST_DONE, 0);  in meson_spifc_txrx()
234 	regmap_update_bits(spifc->regmap, REG_CMD, CMD_USER, CMD_USER);  in meson_spifc_txrx()
236 	ret = meson_spifc_wait_ready(spifc);  in meson_spifc_txrx()
239 		meson_spifc_drain_buffer(spifc, xfer->rx_buf + offset, len);  in meson_spifc_txrx()
255 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_transfer_one()  local
258 	meson_spifc_setup_speed(spifc, xfer->speed_hz);  in meson_spifc_transfer_one()
260 	regmap_update_bits(spifc->regmap, REG_CTRL, CTRL_ENABLE_AHB, 0);  in meson_spifc_transfer_one()
264 		ret = meson_spifc_txrx(spifc, xfer, done, len,  in meson_spifc_transfer_one()
270 	regmap_update_bits(spifc->regmap, REG_CTRL, CTRL_ENABLE_AHB,  in meson_spifc_transfer_one()
278  * @spifc:	the Meson SPI device
280 static void meson_spifc_hw_init(struct meson_spifc *spifc)  in meson_spifc_hw_init()  argument
283 	regmap_update_bits(spifc->regmap, REG_SLAVE, SLAVE_SW_RST,  in meson_spifc_hw_init()
286 	regmap_update_bits(spifc->regmap, REG_USER, USER_CMP_MODE, 0);  in meson_spifc_hw_init()
288 	regmap_update_bits(spifc->regmap, REG_SLAVE, SLAVE_OP_MODE, 0);  in meson_spifc_hw_init()
294 	struct meson_spifc *spifc;  in meson_spifc_probe()  local
306 	spifc = spi_master_get_devdata(master);  in meson_spifc_probe()
307 	spifc->dev = &pdev->dev;  in meson_spifc_probe()
310 	base = devm_ioremap_resource(spifc->dev, res);  in meson_spifc_probe()
316 	spifc->regmap = devm_regmap_init_mmio(spifc->dev, base,  in meson_spifc_probe()
318 	if (IS_ERR(spifc->regmap)) {  in meson_spifc_probe()
319 		ret = PTR_ERR(spifc->regmap);  in meson_spifc_probe()
323 	spifc->clk = devm_clk_get(spifc->dev, NULL);  in meson_spifc_probe()
324 	if (IS_ERR(spifc->clk)) {  in meson_spifc_probe()
325 		dev_err(spifc->dev, "missing clock\n");  in meson_spifc_probe()
326 		ret = PTR_ERR(spifc->clk);  in meson_spifc_probe()
330 	ret = clk_prepare_enable(spifc->clk);  in meson_spifc_probe()
332 		dev_err(spifc->dev, "can't prepare clock\n");  in meson_spifc_probe()
336 	rate = clk_get_rate(spifc->clk);  in meson_spifc_probe()
346 	meson_spifc_hw_init(spifc);  in meson_spifc_probe()
348 	pm_runtime_set_active(spifc->dev);  in meson_spifc_probe()
349 	pm_runtime_enable(spifc->dev);  in meson_spifc_probe()
351 	ret = devm_spi_register_master(spifc->dev, master);  in meson_spifc_probe()
353 		dev_err(spifc->dev, "failed to register spi master\n");  in meson_spifc_probe()
359 	clk_disable_unprepare(spifc->clk);  in meson_spifc_probe()
368 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_remove()  local
371 	clk_disable_unprepare(spifc->clk);  in meson_spifc_remove()
381 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_suspend()  local
389 		clk_disable_unprepare(spifc->clk);  in meson_spifc_suspend()
397 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_resume()  local
401 		ret = clk_prepare_enable(spifc->clk);  in meson_spifc_resume()
406 	meson_spifc_hw_init(spifc);  in meson_spifc_resume()
410 		clk_disable_unprepare(spifc->clk);  in meson_spifc_resume()
420 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_runtime_suspend()  local
422 	clk_disable_unprepare(spifc->clk);  in meson_spifc_runtime_suspend()
430 	struct meson_spifc *spifc = spi_master_get_devdata(master);  in meson_spifc_runtime_resume()  local
432 	return clk_prepare_enable(spifc->clk);  in meson_spifc_runtime_resume()
444 	{ .compatible = "amlogic,meson6-spifc", },
445 	{ .compatible = "amlogic,meson-gxbb-spifc", },
454 		.name		= "meson-spifc",
463 MODULE_DESCRIPTION("Amlogic Meson SPIFC driver");