1 /* $NetBSD: cycv_dwcmmc.c,v 1.7 2021/01/29 14:12:01 skrll Exp $ */
2
3 /*-
4 * Copyright (c) 2015 Jared D. 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: cycv_dwcmmc.c,v 1.7 2021/01/29 14:12:01 skrll Exp $");
31
32 #include <sys/param.h>
33 #include <sys/bus.h>
34 #include <sys/device.h>
35 #include <sys/intr.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/mutex.h>
39 #include <sys/condvar.h>
40
41 #include <dev/ic/dwc_mmc_reg.h>
42 #include <dev/ic/dwc_mmc_var.h>
43 #include <dev/fdt/fdtvar.h>
44
45 #define FIFO_REG 0x200
46
47 static int cycv_dwcmmc_match(device_t, cfdata_t, void *);
48 static void cycv_dwcmmc_attach(device_t, device_t, void *);
49
50 static int cycv_dwcmmc_card_detect(struct dwc_mmc_softc *);
51
52 struct cycv_dwcmmc_softc {
53 struct dwc_mmc_softc sc;
54 int sc_phandle;
55 bool sc_non_removable;
56 bool sc_broken_cd;
57 struct fdtbus_gpio_pin *sc_gpio_cd;
58 bool sc_gpio_cd_inverted;
59 struct clk *sc_clk_biu;
60 struct clk *sc_clk_ciu;
61 };
62
63 CFATTACH_DECL_NEW(cycv_dwcmmc, sizeof(struct dwc_mmc_softc),
64 cycv_dwcmmc_match, cycv_dwcmmc_attach, NULL, NULL);
65
66 static const struct device_compatible_entry compat_data[] = {
67 { .compat = "altr,socfpga-dw-mshc" },
68 DEVICE_COMPAT_EOL
69 };
70
71 static int
cycv_dwcmmc_match(device_t parent,cfdata_t cf,void * aux)72 cycv_dwcmmc_match(device_t parent, cfdata_t cf, void *aux)
73 {
74 struct fdt_attach_args * const faa = aux;
75
76 return of_compatible_match(faa->faa_phandle, compat_data);
77 }
78
79 static void
cycv_dwcmmc_attach(device_t parent,device_t self,void * aux)80 cycv_dwcmmc_attach(device_t parent, device_t self, void *aux)
81 {
82 struct cycv_dwcmmc_softc *esc = device_private(self);
83 struct dwc_mmc_softc *sc = &esc->sc;
84 struct fdt_attach_args * const faa = aux;
85 const int phandle = faa->faa_phandle;
86 char intrstr[128];
87 bus_addr_t addr;
88 bus_size_t size;
89 u_int fifo_depth;
90 int error;
91
92 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
93 aprint_error(": couldn't get registers\n");
94 return;
95 }
96
97 if (of_getprop_uint32(phandle, "fifo-depth", &fifo_depth)) {
98 fifo_depth = 64;
99 }
100
101 esc->sc_clk_biu = fdtbus_clock_get(phandle, "biu");
102 if (esc->sc_clk_biu == NULL) {
103 aprint_error(": couldn't get clock biu\n");
104 return;
105 }
106 esc->sc_clk_ciu = fdtbus_clock_get(phandle, "ciu");
107 if (esc->sc_clk_ciu == NULL) {
108 aprint_error(": couldn't get clock ciu\n");
109 return;
110 }
111
112 error = clk_enable(esc->sc_clk_biu);
113 if (error) {
114 aprint_error(": couldn't enable clock biu: %d\n", error);
115 return;
116 }
117 error = clk_enable(esc->sc_clk_ciu);
118 if (error) {
119 aprint_error(": couldn't enable clock ciu: %d\n", error);
120 return;
121 }
122
123 sc->sc_dev = self;
124 sc->sc_bst = faa->faa_bst;
125 sc->sc_dmat = faa->faa_dmat;
126 error = bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh);
127 if (error) {
128 aprint_error(": couldn't map %#" PRIxBUSADDR ": %d\n",
129 addr, error);
130 return;
131 }
132
133 sc->sc_clock_freq = clk_get_rate(esc->sc_clk_ciu);
134 sc->sc_fifo_depth = fifo_depth;
135 sc->sc_fifo_reg = FIFO_REG;
136 sc->sc_flags = DWC_MMC_F_USE_HOLD_REG | DWC_MMC_F_DMA;
137 sc->sc_intr_cardmask = DWC_MMC_INT_SDIO_INT(8);
138
139 sc->sc_card_detect = cycv_dwcmmc_card_detect;
140 sc->sc_write_protect = NULL;
141
142 esc->sc_phandle = phandle;
143 esc->sc_gpio_cd = fdtbus_gpio_acquire(phandle, "cd-gpios", GPIO_PIN_INPUT);
144 esc->sc_gpio_cd_inverted = of_hasprop(phandle, "cd-inverted") ? 0 : 1;
145
146 esc->sc_non_removable = of_hasprop(phandle, "non-removable");
147 esc->sc_broken_cd = of_hasprop(phandle, "broken-cd");
148
149 aprint_naive("\n");
150 aprint_normal(": MHS (%u Hz)\n", sc->sc_clock_freq);
151
152 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
153 aprint_error_dev(self, "failed to decode interrupt\n");
154 return;
155 }
156
157 if (dwc_mmc_init(sc) != 0)
158 return;
159
160 sc->sc_ih = fdtbus_intr_establish_xname(phandle, 0, IPL_BIO, 0,
161 dwc_mmc_intr, sc, device_xname(sc->sc_dev));
162 if (sc->sc_ih == NULL) {
163 aprint_error_dev(self, "couldn't establish interrupt on %s\n",
164 intrstr);
165 return;
166 }
167 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
168 }
169
170 static int
cycv_dwcmmc_card_detect(struct dwc_mmc_softc * sc)171 cycv_dwcmmc_card_detect(struct dwc_mmc_softc *sc)
172 {
173 struct cycv_dwcmmc_softc *esc = device_private(sc->sc_dev);
174 int val;
175
176 if (esc->sc_non_removable || esc->sc_broken_cd) {
177 return 1;
178 } else if (esc->sc_gpio_cd != NULL) {
179 val = fdtbus_gpio_read(esc->sc_gpio_cd);
180 if (esc->sc_gpio_cd_inverted)
181 val = !val;
182 return val;
183 } else {
184 return 1;
185 }
186 }
187