1 /*-
3  * Copyright (c) 2014-2015 M. Warner Losh <imp@FreeBSD.org>
26  * The magic-bit-bang sequence used in this code may be based on a linux
45 #include <dev/ahci/ahci.h>
50  * Allwinner a1x/a2x/a8x SATA attachment.  This is just the AHCI register
51  * set with a few extra implementation-specific registers that need to
59 /* BITx -- Unknown bit that needs to be set/cleared at position x */
60 /* UFx -- Uknown multi-bit field frobbed during init */
165 	 * Here starts the magic -- most of the comments are based  in ahci_a10_phy_reset()
176 	ATA_OUTL(ctlr->r_mem, AHCI_RWCR, 0);  in ahci_a10_phy_reset()
183 	ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_HIGHZ);  in ahci_a10_phy_reset()
188 	ahci_mask_set(ctlr->r_mem, AHCI_PHYCS0R,  in ahci_a10_phy_reset()
195 	ahci_mask_set(ctlr->r_mem, AHCI_PHYCS1R,  in ahci_a10_phy_reset()
200 	 * Two more mystery bits in PHYCS1R. -- can these be combined above?  in ahci_a10_phy_reset()
202 	ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_BIT15 | PHYCS1R_BIT28);  in ahci_a10_phy_reset()
209 	ahci_clr(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_HIGHZ);  in ahci_a10_phy_reset()
214 	ahci_mask_set(ctlr->r_mem, AHCI_PHYCS0R,  in ahci_a10_phy_reset()
220 	ahci_mask_set(ctlr->r_mem, AHCI_PHYCS2R, ~PHYCS2R_UF1_MASK,  in ahci_a10_phy_reset()
229 	ahci_set(ctlr->r_mem, AHCI_PHYCS0R, PHYCS0R_POWER_ENABLE);  in ahci_a10_phy_reset()
230 	for (to = PHY_RESET_TIMEOUT; to > 0; to--) {  in ahci_a10_phy_reset()
231 		val = ATA_INL(ctlr->r_mem, AHCI_PHYCS0R);  in ahci_a10_phy_reset()
243 	ahci_set(ctlr->r_mem, AHCI_PHYCS2R, PHYCS2R_CALIBRATE);  in ahci_a10_phy_reset()
244 	for (to = PHY_RESET_TIMEOUT; to > 0; to--) {  in ahci_a10_phy_reset()
245 		val = ATA_INL(ctlr->r_mem, AHCI_PHYCS2R);  in ahci_a10_phy_reset()
261 	ATA_OUTL(ctlr->r_mem, AHCI_RWCR, 7);  in ahci_a10_phy_reset()
273 	reg = ATA_INL(ch->r_mem, AHCI_P0DMACR);  in ahci_a10_ch_start()
276 	ATA_OUTL(ch->r_mem, AHCI_P0DMACR, reg);  in ahci_a10_ch_start()
292 	if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-ahci"))  in ahci_a10_probe()
294 	device_set_desc(dev, "Allwinner Integrated AHCI controller");  in ahci_a10_probe()
307 	ctlr = &sc->ahci_ctlr;  in ahci_a10_attach()
309 	ctlr->quirks = AHCI_Q_NOPMP;  in ahci_a10_attach()
310 	ctlr->vendorid = 0;  in ahci_a10_attach()
311 	ctlr->deviceid = 0;  in ahci_a10_attach()
312 	ctlr->subvendorid = 0;  in ahci_a10_attach()
313 	ctlr->subdeviceid = 0;  in ahci_a10_attach()
314 	ctlr->r_rid = 0;  in ahci_a10_attach()
315 	if (!(ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,  in ahci_a10_attach()
316 	    &ctlr->r_rid, RF_ACTIVE)))  in ahci_a10_attach()
320 	if (regulator_get_by_ofw_property(dev, 0, "target-supply",  in ahci_a10_attach()
321 	    &sc->ahci_reg)  == 0) {  in ahci_a10_attach()
322 		error = regulator_enable(sc->ahci_reg);  in ahci_a10_attach()
330 	error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk_gate);  in ahci_a10_attach()
335 	error = clk_get_by_ofw_index(dev, 0, 1, &sc->clk_pll);  in ahci_a10_attach()
340 	error = clk_set_freq(sc->clk_pll, PLL_FREQ, CLK_SET_ROUND_DOWN);  in ahci_a10_attach()
345 	error = clk_enable(sc->clk_pll);  in ahci_a10_attach()
350 	error = clk_enable(sc->clk_gate);  in ahci_a10_attach()
363 	ctlr->msi = 0;  in ahci_a10_attach()
364 	ctlr->numirqs = 1;  in ahci_a10_attach()
367 	ctlr->ch_start = ahci_a10_ch_start;  in ahci_a10_attach()
370 	 * Note: ahci_attach will release ctlr->r_mem on errors automatically  in ahci_a10_attach()
375 	if (sc->ahci_reg != NULL)  in ahci_a10_attach()
376 		regulator_disable(sc->ahci_reg);  in ahci_a10_attach()
377 	if (sc->clk_gate != NULL)  in ahci_a10_attach()
378 		clk_release(sc->clk_gate);  in ahci_a10_attach()
379 	if (sc->clk_pll != NULL)  in ahci_a10_attach()
380 		clk_release(sc->clk_pll);  in ahci_a10_attach()
381 	bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);  in ahci_a10_attach()
392 	ctlr = &sc->ahci_ctlr;  in ahci_a10_detach()
394 	if (sc->ahci_reg != NULL)  in ahci_a10_detach()
395 		regulator_disable(sc->ahci_reg);  in ahci_a10_detach()
396 	if (sc->clk_gate != NULL)  in ahci_a10_detach()
397 		clk_release(sc->clk_gate);  in ahci_a10_detach()
398 	if (sc->clk_pll != NULL)  in ahci_a10_detach()
399 		clk_release(sc->clk_pll);  in ahci_a10_detach()
400 	bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);  in ahci_a10_detach()
418         "ahci",