1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
101 #define	FUDW_MGMT_READ(_sc, _o)		bus_read_4((_sc)->mgmt_res, (_o))
102 #define	FUDW_MGMT_WRITE(_sc, _o, _v)	bus_write_4((_sc)->mgmt_res, (_o), (_v))
105 	{ "sifive,fu740-pcie",	1 },
113 	unsigned timeout;  in fupci_phy_read()  local
119 	timeout = 10;  in fupci_phy_read()
125 	} while (--timeout > 0);  in fupci_phy_read()
127 	if (timeout == 0) {  in fupci_phy_read()
128 		device_printf(sc->dev, "Timeout waiting for read ACK\n");  in fupci_phy_read()
135 	timeout = 10;  in fupci_phy_read()
141 	} while (--timeout > 0);  in fupci_phy_read()
143 	if (timeout == 0) {  in fupci_phy_read()
144 		device_printf(sc->dev, "Timeout waiting for read un-ACK\n");  in fupci_phy_read()
154 	unsigned timeout;  in fupci_phy_write()  local
161 	timeout = 10;  in fupci_phy_write()
167 	} while (--timeout > 0);  in fupci_phy_write()
169 	if (timeout == 0) {  in fupci_phy_write()
170 		device_printf(sc->dev, "Timeout waiting for write ACK\n");  in fupci_phy_write()
176 	timeout = 10;  in fupci_phy_write()
182 	} while (--timeout > 0);  in fupci_phy_write()
184 	if (timeout == 0) {  in fupci_phy_write()
185 		device_printf(sc->dev, "Timeout waiting for write un-ACK\n");  in fupci_phy_write()
198 	dev = sc->dev;  in fupci_phy_init()
200 	/* Assert core power-on reset (active low) */  in fupci_phy_init()
201 	error = gpio_pin_set_active(sc->porst_pin, false);  in fupci_phy_init()
203 		device_printf(dev, "Cannot assert power-on reset: %d\n",  in fupci_phy_init()
211 	/* Enable power */  in fupci_phy_init()
212 	error = gpio_pin_set_active(sc->pwren_pin, true);  in fupci_phy_init()
214 		device_printf(dev, "Cannot enable power: %d\n", error);  in fupci_phy_init()
218 	/* Deassert core power-on reset (active low) */  in fupci_phy_init()
219 	error = gpio_pin_set_active(sc->porst_pin, true);  in fupci_phy_init()
221 		device_printf(dev, "Cannot deassert power-on reset: %d\n",  in fupci_phy_init()
226 	/* Enable the aux clock */  in fupci_phy_init()
227 	error = clk_enable(sc->pcie_aux_clk);  in fupci_phy_init()
229 		device_printf(dev, "Cannot enable aux clock: %d\n", error);  in fupci_phy_init()
237 	error = hwreset_deassert(sc->pcie_aux_rst);  in fupci_phy_init()
243 	/* Enable control register interface */  in fupci_phy_init()
247 	/* Wait for enable to take effect */  in fupci_phy_init()
258 	error = clk_disable(sc->pcie_aux_clk);  in fupci_phy_init()
267 	/* Enable the aux clock again */  in fupci_phy_init()
268 	error = clk_enable(sc->pcie_aux_clk);  in fupci_phy_init()
270 		device_printf(dev, "Cannot re-enable aux clock: %d\n", error);  in fupci_phy_init()
291 	reg = pci_dw_dbi_rd4(sc->dev, DW_MISC_CONTROL_1);  in fupci_dbi_protect()
296 	pci_dw_dbi_wr4(sc->dev, DW_MISC_CONTROL_1, reg);  in fupci_dbi_protect()
302 	/* Enable 32-bit I/O window */  in fupci_init()
304 	pci_dw_dbi_wr2(sc->dev, PCIR_IOBASEL_1,  in fupci_init()
308 	/* Enable LTSSM */  in fupci_init()
320 	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)  in fupci_probe()
337 	sc->dev = dev;  in fupci_attach()
340 	error = ofw_bus_find_string_index(node, "reg-names", "dbi", &rid);  in fupci_attach()
345 	sc->dw_sc.dbi_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,  in fupci_attach()
347 	if (sc->dw_sc.dbi_res == NULL) {  in fupci_attach()
354 	error = ofw_bus_find_string_index(node, "reg-names", "mgmt", &rid);  in fupci_attach()
360 	sc->mgmt_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,  in fupci_attach()
362 	if (sc->mgmt_res == NULL) {  in fupci_attach()
368 	error = gpio_pin_get_by_ofw_property(dev, node, "reset-gpios",  in fupci_attach()
369 	    &sc->porst_pin);  in fupci_attach()
370 	/* Old U-Boot device tree uses perstn-gpios */  in fupci_attach()
372 		error = gpio_pin_get_by_ofw_property(dev, node, "perstn-gpios",  in fupci_attach()
373 		    &sc->porst_pin);  in fupci_attach()
375 		device_printf(dev, "Cannot get power-on reset GPIO: %d\n",  in fupci_attach()
379 	error = gpio_pin_setflags(sc->porst_pin, GPIO_PIN_OUTPUT);  in fupci_attach()
381 		device_printf(dev, "Cannot configure power-on reset GPIO: %d\n",  in fupci_attach()
386 	error = gpio_pin_get_by_ofw_property(dev, node, "pwren-gpios",  in fupci_attach()
387 	    &sc->pwren_pin);  in fupci_attach()
389 		device_printf(dev, "Cannot get power enable GPIO: %d\n",  in fupci_attach()
393 	error = gpio_pin_setflags(sc->pwren_pin, GPIO_PIN_OUTPUT);  in fupci_attach()
395 		device_printf(dev, "Cannot configure power enable GPIO: %d\n",  in fupci_attach()
400 	error = clk_get_by_ofw_name(dev, node, "pcie_aux", &sc->pcie_aux_clk);  in fupci_attach()
401 	/* Old U-Boot device tree uses pcieaux */  in fupci_attach()
404 		    &sc->pcie_aux_clk);  in fupci_attach()
410 	error = hwreset_get_by_ofw_idx(dev, node, 0, &sc->pcie_aux_rst);  in fupci_attach()