1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
42 #include <dev/fdt/fdt_common.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
46 #include <dev/clk/clk.h>
47 #include <dev/syscon/syscon.h>
48 #include <dev/phy/phy.h>
102 	{ "rockchip,rk3399-emmc-phy",	1 },
107 	struct syscon		*syscon;  member
112 #define	LOWEST_SET_BIT(mask)	((((mask) - 1) & (mask)) ^ (mask))
129 	device_t dev;  in rk_emmcphy_enable()  local
135 	dev = phynode_get_device(phynode);  in rk_emmcphy_enable()
137 	sc = device_get_softc(dev);  in rk_emmcphy_enable()
140 		device_printf(dev, "Phy id: %ld\n", phy);  in rk_emmcphy_enable()
143 		device_printf(dev, "Unknown phy: %ld\n", phy);  in rk_emmcphy_enable()
150 		SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON6,  in rk_emmcphy_enable()
156 		SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON0,  in rk_emmcphy_enable()
163 	SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON6, (mask << 16) | val);  in rk_emmcphy_enable()
168 	sc->phy_conf = (struct rk_emmcphy_conf *)ofw_bus_search_compatible(dev,  in rk_emmcphy_enable()
169 	    compat_data)->ocd_data;  in rk_emmcphy_enable()
172 	error = clk_get_by_ofw_name(dev, 0, "emmcclk", &sc->clk);  in rk_emmcphy_enable()
174 		device_printf(dev, "cannot get emmcclk clock, continue\n");  in rk_emmcphy_enable()
175 		sc->clk = NULL;  in rk_emmcphy_enable()
177 		device_printf(dev, "got emmcclk clock\n");  in rk_emmcphy_enable()
179 	if (sc->clk) {  in rk_emmcphy_enable()
180 		error = clk_get_freq(sc->clk, &rate);  in rk_emmcphy_enable()
182 			device_printf(dev, "cannot get clock frequency\n");  in rk_emmcphy_enable()
205 	SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON6, (mask << 16) | val);  in rk_emmcphy_enable()
209 	val = SYSCON_READ_4(sc->syscon, GRF_EMMCPHY_STATUS);  in rk_emmcphy_enable()
211 		device_printf(dev, "PHY calibration did not complete\n");  in rk_emmcphy_enable()
218 	SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON0, (mask << 16) | val);  in rk_emmcphy_enable()
223 	SYSCON_WRITE_4(sc->syscon, GRF_EMMCPHY_CON6, (mask << 16) | val);  in rk_emmcphy_enable()
245 		val = SYSCON_READ_4(sc->syscon, GRF_EMMCPHY_STATUS);  in rk_emmcphy_enable()
247 			device_printf(dev, "DLL loop failed to lock\n");  in rk_emmcphy_enable()
256 rk_emmcphy_probe(device_t dev)  in rk_emmcphy_probe()  argument
259 	if (!ofw_bus_status_okay(dev))  in rk_emmcphy_probe()
262 	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)  in rk_emmcphy_probe()
265 	device_set_desc(dev, "Rockchip RK3399 eMMC PHY");  in rk_emmcphy_probe()
270 rk_emmcphy_attach(device_t dev)  in rk_emmcphy_attach()  argument
280 	sc = device_get_softc(dev);  in rk_emmcphy_attach()
281 	node = ofw_bus_get_node(dev);  in rk_emmcphy_attach()
285 		device_printf(dev, "cannot get clocks handle\n");  in rk_emmcphy_attach()
289 	if (OF_hasprop(xnode, "arasan,soc-ctl-syscon") &&  in rk_emmcphy_attach()
290 	    syscon_get_by_ofw_property(dev, xnode,  in rk_emmcphy_attach()
291 	    "arasan,soc-ctl-syscon", &sc->syscon) != 0) {  in rk_emmcphy_attach()
292 		device_printf(dev, "cannot get grf driver handle\n");  in rk_emmcphy_attach()
296 	if (sc->syscon == NULL) {  in rk_emmcphy_attach()
297 		device_printf(dev, "failed to get syscon\n");  in rk_emmcphy_attach()
304 	phy_init.ofw_node = ofw_bus_get_node(dev);  in rk_emmcphy_attach()
305 	phynode = phynode_create(dev, &rk_emmcphy_phynode_class, &phy_init);  in rk_emmcphy_attach()
307 		device_printf(dev, "failed to create eMMC PHY\n");  in rk_emmcphy_attach()
311 		device_printf(dev, "failed to register eMMC PHY\n");  in rk_emmcphy_attach()
316 		device_printf(dev, "Attached phy id: %ld\n", phy);  in rk_emmcphy_attach()