1 /* $NetBSD: sunxi_sata.c,v 1.4 2021/01/27 03:10:20 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30
31 __KERNEL_RCSID(0, "$NetBSD: sunxi_sata.c,v 1.4 2021/01/27 03:10:20 thorpej Exp $");
32
33 #include <sys/param.h>
34 #include <sys/bus.h>
35 #include <sys/device.h>
36 #include <sys/intr.h>
37 #include <sys/systm.h>
38
39 #include <dev/ata/atavar.h>
40 #include <dev/ic/ahcisatavar.h>
41
42 #include <dev/fdt/fdtvar.h>
43
44 static const struct device_compatible_entry compat_data[] = {
45 { .compat = "allwinner,sun4i-a10-ahci" },
46 DEVICE_COMPAT_EOL
47 };
48
49 #define SUNXI_SATA_DMACR(port) (0x170 + AHCI_P_OFFSET(port))
50
51 static void
sunxi_sata_channel_start(struct ahci_softc * sc,struct ata_channel * chp)52 sunxi_sata_channel_start(struct ahci_softc *sc, struct ata_channel *chp)
53 {
54 const bus_size_t dma_reg = SUNXI_SATA_DMACR(chp->ch_channel);
55 uint32_t val;
56
57 val = AHCI_READ(sc, dma_reg);
58 val &= ~0xffff;
59 val |= 0x4433;
60 AHCI_WRITE(sc, dma_reg, val);
61 }
62
63 static int
sunxi_sata_match(device_t parent,cfdata_t cf,void * aux)64 sunxi_sata_match(device_t parent, cfdata_t cf, void *aux)
65 {
66 struct fdt_attach_args * const faa = aux;
67
68 return of_compatible_match(faa->faa_phandle, compat_data);
69 }
70
71 static void
sunxi_sata_attach(device_t parent,device_t self,void * aux)72 sunxi_sata_attach(device_t parent, device_t self, void *aux)
73 {
74 struct ahci_softc * const sc = device_private(self);
75 struct fdt_attach_args * const faa = aux;
76 const int phandle = faa->faa_phandle;
77 char intrstr[128];
78 struct clk *clk;
79 bus_addr_t addr;
80 bus_size_t size;
81 int i;
82
83 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
84 aprint_error(": couldn't get registers\n");
85 return;
86 }
87
88 sc->sc_atac.atac_dev = self;
89 sc->sc_dmat = faa->faa_dmat;
90 sc->sc_ahcit = faa->faa_bst;
91 sc->sc_ahcis = size;
92 if (bus_space_map(sc->sc_ahcit, addr, size, 0, &sc->sc_ahcih) != 0) {
93 aprint_error(": couldn't map registers\n");
94 return;
95 }
96 sc->sc_ahci_ports = 1;
97 sc->sc_ahci_quirks = AHCI_QUIRK_BADPMP;
98 sc->sc_save_init_data = true;
99 sc->sc_channel_start = sunxi_sata_channel_start;
100
101 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
102 aprint_error(": failed to decode interrupt\n");
103 return;
104 }
105
106 for (i = 0; (clk = fdtbus_clock_get_index(phandle, i)) != NULL; i++)
107 if (clk_enable(clk) != 0) {
108 aprint_error(": couldn't enable clock #%d\n", i);
109 return;
110 }
111
112 aprint_naive("\n");
113 aprint_normal(": SATA\n");
114
115 if (fdtbus_intr_establish_xname(phandle, 0, IPL_BIO, 0, ahci_intr,
116 sc, device_xname(self)) == NULL) {
117 aprint_error_dev(self, "failed to establish interrupt on %s\n", intrstr);
118 return;
119 }
120 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
121
122 ahci_attach(sc);
123 }
124
125 CFATTACH_DECL_NEW(sunxi_sata, sizeof(struct ahci_softc),
126 sunxi_sata_match, sunxi_sata_attach, NULL, NULL);
127