2 * Copyright (c) 2015 Luiz Otavio O Souza <loos@freebsd.org> All rights reserved.
3 * Copyright (c) 2014-2015 M. Warner Losh <imp@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * The magic-bit-bang sequence used in this code may be based on a linux
27 * platform driver in the Allwinner SDK from Allwinner Technology Co., Ltd.
28 * www.allwinnertech.com, by Daniel Wang <danielwang@allwinnertech.com>
29 * though none of the original code was copied.
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 #include <sys/param.h>
38 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/module.h>
44 #include <machine/bus.h>
45 #include <dev/ofw/ofw_bus.h>
46 #include <dev/ofw/ofw_bus_subr.h>
48 #include <dev/ahci/ahci.h>
49 #include <dev/extres/clk/clk.h>
52 * Allwinner a1x/a2x/a8x SATA attachment. This is just the AHCI register
53 * set with a few extra implementation-specific registers that need to
54 * be accounted for. There's only one PHY in the system, and it needs
55 * to be trained to bring the link up. In addition, there's some DMA
56 * specific things that need to be done as well. These things are also
57 * just about completely undocumented, except in ugly code in the Linux
58 * SDK Allwinner releases.
61 /* BITx -- Unknown bit that needs to be set/cleared at position x */
62 /* UFx -- Uknown multi-bit field frobbed during init */
63 #define AHCI_BISTAFR 0x00A0
64 #define AHCI_BISTCR 0x00A4
65 #define AHCI_BISTFCTR 0x00A8
66 #define AHCI_BISTSR 0x00AC
67 #define AHCI_BISTDECR 0x00B0
68 #define AHCI_DIAGNR 0x00B4
69 #define AHCI_DIAGNR1 0x00B8
70 #define AHCI_OOBR 0x00BC
71 #define AHCI_PHYCS0R 0x00C0
72 /* Bits 0..17 are a mystery */
73 #define PHYCS0R_BIT18 (1 << 18)
74 #define PHYCS0R_POWER_ENABLE (1 << 19)
75 #define PHYCS0R_UF1_MASK (7 << 20) /* Unknown Field 1 */
76 #define PHYCS0R_UF1_INIT (3 << 20)
77 #define PHYCS0R_BIT23 (1 << 23)
78 #define PHYCS0R_UF2_MASK (7 << 24) /* Uknown Field 2 */
79 #define PHYCS0R_UF2_INIT (5 << 24)
81 #define PHYCS0R_POWER_STATUS_MASK (7 << 28)
82 #define PHYCS0R_PS_GOOD (2 << 28)
84 #define AHCI_PHYCS1R 0x00C4
85 /* Bits 0..5 are a mystery */
86 #define PHYCS1R_UF1_MASK (3 << 6)
87 #define PHYCS1R_UF1_INIT (2 << 6)
88 #define PHYCS1R_UF2_MASK (0x1f << 8)
89 #define PHYCS1R_UF2_INIT (6 << 8)
90 /* Bits 13..14 are a mystery */
91 #define PHYCS1R_BIT15 (1 << 15)
92 #define PHYCS1R_UF3_MASK (3 << 16)
93 #define PHYCS1R_UF3_INIT (2 << 16)
95 #define PHYCS1R_HIGHZ (1 << 19)
96 /* Bits 20..27 mystery */
97 #define PHYCS1R_BIT28 (1 << 28)
98 /* Bits 29..31 mystery */
99 #define AHCI_PHYCS2R 0x00C8
100 /* bits 0..4 mystery */
101 #define PHYCS2R_UF1_MASK (0x1f << 5)
102 #define PHYCS2R_UF1_INIT (0x19 << 5)
103 /* Bits 10..23 mystery */
104 #define PHYCS2R_CALIBRATE (1 << 24)
105 /* Bits 25..31 mystery */
106 #define AHCI_TIMER1MS 0x00E0
107 #define AHCI_GPARAM1R 0x00E8
108 #define AHCI_GPARAM2R 0x00EC
109 #define AHCI_PPARAMR 0x00F0
110 #define AHCI_TESTR 0x00F4
111 #define AHCI_VERSIONR 0x00F8
112 #define AHCI_IDR 0x00FC
113 #define AHCI_RWCR 0x00FC
115 #define AHCI_P0DMACR 0x0070
116 #define AHCI_P0PHYCR 0x0078
117 #define AHCI_P0PHYSR 0x007C
119 #define PLL_FREQ 100000000
122 ahci_set(struct resource *m, bus_size_t off, uint32_t set)
124 uint32_t val = ATA_INL(m, off);
127 ATA_OUTL(m, off, val);
131 ahci_clr(struct resource *m, bus_size_t off, uint32_t clr)
133 uint32_t val = ATA_INL(m, off);
136 ATA_OUTL(m, off, val);
140 ahci_mask_set(struct resource *m, bus_size_t off, uint32_t mask, uint32_t set)
142 uint32_t val = ATA_INL(m, off);
146 ATA_OUTL(m, off, val);
150 * Should this be phy_reset or phy_init
152 #define PHY_RESET_TIMEOUT 1000
154 ahci_a10_phy_reset(device_t dev)
157 struct ahci_controller *ctlr = device_get_softc(dev);
160 * Here starts the magic -- most of the comments are based
161 * on guesswork, names of routines and printf error
162 * messages. The code works, but it will do that even if the
163 * comments are 100% BS.
167 * Lock out other access while we initialize. Or at least that
168 * seems to be the case based on Linux SDK #defines. Maybe this
169 * put things into reset?
171 ATA_OUTL(ctlr->r_mem, AHCI_RWCR, 0);
175 * Set bit 19 in PHYCS1R. Guessing this disables driving the PHY
176 * port for a bit while we reset things.
178 ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_HIGHZ);
183 ahci_mask_set(ctlr->r_mem, AHCI_PHYCS0R,
185 PHYCS0R_UF2_INIT | PHYCS0R_BIT23 | PHYCS0R_BIT18);
188 * Set three fields in PHYCS1R
190 ahci_mask_set(ctlr->r_mem, AHCI_PHYCS1R,
191 ~(PHYCS1R_UF1_MASK | PHYCS1R_UF2_MASK | PHYCS1R_UF3_MASK),
192 PHYCS1R_UF1_INIT | PHYCS1R_UF2_INIT | PHYCS1R_UF3_INIT);
195 * Two more mystery bits in PHYCS1R. -- can these be combined above?
197 ahci_set(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_BIT15 | PHYCS1R_BIT28);
200 * Now clear that first mysery bit. Perhaps this starts
201 * driving the PHY again so we can power it up and start
202 * talking to the SATA drive, if any below.
204 ahci_clr(ctlr->r_mem, AHCI_PHYCS1R, PHYCS1R_HIGHZ);
207 * Frob PHYCS0R again...
209 ahci_mask_set(ctlr->r_mem, AHCI_PHYCS0R,
210 ~PHYCS0R_UF1_MASK, PHYCS0R_UF1_INIT);
213 * Frob PHYCS2R, because 25 means something?
215 ahci_mask_set(ctlr->r_mem, AHCI_PHYCS2R, ~PHYCS2R_UF1_MASK,
218 DELAY(100); /* WAG */
221 * Turn on the power to the PHY and wait for it to report back
224 ahci_set(ctlr->r_mem, AHCI_PHYCS0R, PHYCS0R_POWER_ENABLE);
225 for (to = PHY_RESET_TIMEOUT; to > 0; to--) {
226 val = ATA_INL(ctlr->r_mem, AHCI_PHYCS0R);
227 if ((val & PHYCS0R_POWER_STATUS_MASK) == PHYCS0R_PS_GOOD)
231 if (to == 0 && bootverbose)
232 device_printf(dev, "PHY Power Failed PHYCS0R = %#x\n", val);
235 * Calibrate the clocks between the device and the host. This appears
236 * to be an automated process that clears the bit when it is done.
238 ahci_set(ctlr->r_mem, AHCI_PHYCS2R, PHYCS2R_CALIBRATE);
239 for (to = PHY_RESET_TIMEOUT; to > 0; to--) {
240 val = ATA_INL(ctlr->r_mem, AHCI_PHYCS2R);
241 if ((val & PHYCS2R_CALIBRATE) == 0)
245 if (to == 0 && bootverbose)
246 device_printf(dev, "PHY Cal Failed PHYCS2R %#x\n", val);
249 * OK, let things settle down a bit.
254 * Go back into normal mode now that we've calibrated the PHY.
256 ATA_OUTL(ctlr->r_mem, AHCI_RWCR, 7);
260 ahci_a10_ch_start(struct ahci_channel *ch)
265 * Magical values from Allwinner SDK, setup the DMA before start
266 * operations on this channel.
268 reg = ATA_INL(ch->r_mem, AHCI_P0DMACR);
271 ATA_OUTL(ch->r_mem, AHCI_P0DMACR, reg);
275 ahci_a10_ctlr_reset(device_t dev)
278 ahci_a10_phy_reset(dev);
280 return (ahci_ctlr_reset(dev));
284 ahci_a10_probe(device_t dev)
287 if (!ofw_bus_is_compatible(dev, "allwinner,sun4i-a10-ahci"))
289 device_set_desc(dev, "Allwinner Integrated AHCI controller");
291 return (BUS_PROBE_DEFAULT);
295 ahci_a10_attach(device_t dev)
298 struct ahci_controller *ctlr;
299 clk_t clk_pll, clk_gate;
301 ctlr = device_get_softc(dev);
302 clk_pll = clk_gate = NULL;
304 ctlr->quirks = AHCI_Q_NOPMP;
307 ctlr->subvendorid = 0;
308 ctlr->subdeviceid = 0;
310 if (!(ctlr->r_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
311 &ctlr->r_rid, RF_ACTIVE)))
315 error = clk_get_by_ofw_index(dev, 0, 0, &clk_gate);
317 device_printf(dev, "Cannot get gate clock\n");
320 error = clk_get_by_ofw_index(dev, 0, 1, &clk_pll);
322 device_printf(dev, "Cannot get PLL clock\n");
325 error = clk_set_freq(clk_pll, PLL_FREQ, CLK_SET_ROUND_DOWN);
327 device_printf(dev, "Cannot set PLL frequency\n");
330 error = clk_enable(clk_pll);
332 device_printf(dev, "Cannot enable PLL\n");
335 error = clk_enable(clk_gate);
337 device_printf(dev, "Cannot enable clk gate\n");
341 /* Reset controller */
342 if ((error = ahci_a10_ctlr_reset(dev)) != 0)
346 * No MSI registers on this platform.
351 /* Channel start callback(). */
352 ctlr->ch_start = ahci_a10_ch_start;
355 * Note: ahci_attach will release ctlr->r_mem on errors automatically
357 return (ahci_attach(dev));
360 if (clk_gate != NULL)
361 clk_release(clk_gate);
363 clk_release(clk_pll);
364 bus_release_resource(dev, SYS_RES_MEMORY, ctlr->r_rid, ctlr->r_mem);
369 ahci_a10_detach(device_t dev)
372 return (ahci_detach(dev));
375 static device_method_t ahci_ata_methods[] = {
376 DEVMETHOD(device_probe, ahci_a10_probe),
377 DEVMETHOD(device_attach, ahci_a10_attach),
378 DEVMETHOD(device_detach, ahci_a10_detach),
379 DEVMETHOD(bus_print_child, ahci_print_child),
380 DEVMETHOD(bus_alloc_resource, ahci_alloc_resource),
381 DEVMETHOD(bus_release_resource, ahci_release_resource),
382 DEVMETHOD(bus_setup_intr, ahci_setup_intr),
383 DEVMETHOD(bus_teardown_intr,ahci_teardown_intr),
384 DEVMETHOD(bus_child_location_str, ahci_child_location_str),
388 static driver_t ahci_ata_driver = {
391 sizeof(struct ahci_controller)
394 DRIVER_MODULE(a10_ahci, simplebus, ahci_ata_driver, ahci_devclass, 0, 0);