m25p.c revision 1.6.4.1
1 /* $NetBSD: m25p.c,v 1.6.4.1 2020/04/08 14:08:12 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 Urbana-Champaign Independent Media Center. 5 * Copyright (c) 2006 Garrett D'Amore. 6 * All rights reserved. 7 * 8 * Portions of this code were written by Garrett D'Amore for the 9 * Champaign-Urbana Community Wireless Network Project. 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer in the documentation and/or other materials provided 19 * with the distribution. 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgements: 22 * This product includes software developed by the Urbana-Champaign 23 * Independent Media Center. 24 * This product includes software developed by Garrett D'Amore. 25 * 4. Urbana-Champaign Independent Media Center's name and Garrett 26 * D'Amore's name may not be used to endorse or promote products 27 * derived from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT 30 * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR 31 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT 34 * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: m25p.c,v 1.6.4.1 2020/04/08 14:08:12 martin Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 #include <sys/kernel.h> 51 52 #include <dev/sysmon/sysmonvar.h> 53 54 #include <dev/spi/spivar.h> 55 #include <dev/spi/spiflash.h> 56 57 /* 58 * Device driver for STMicroelectronics M25P Family SPI Flash Devices 59 */ 60 61 static int m25p_match(device_t , cfdata_t , void *); 62 static void m25p_attach(device_t , device_t , void *); 63 static void m25p_doattach(device_t); 64 static const char *m25p_getname(void *); 65 static struct spi_handle *m25p_gethandle(void *); 66 static int m25p_getflags(void *); 67 static int m25p_getsize(void *, int); 68 69 struct m25p_softc { 70 struct spi_handle *sc_sh; 71 const char *sc_name; 72 int sc_sizes[SPIFLASH_SIZE_COUNT]; 73 int sc_flags; 74 }; 75 76 CFATTACH_DECL_NEW(m25p, sizeof(struct m25p_softc), 77 m25p_match, m25p_attach, NULL, NULL); 78 79 static const struct spiflash_hw_if m25p_hw_if = { 80 .sf_getname = m25p_getname, 81 .sf_gethandle = m25p_gethandle, 82 .sf_getsize = m25p_getsize, 83 .sf_getflags = m25p_getflags, 84 }; 85 86 static const struct m25p_info { 87 uint8_t sig; 88 uint8_t mfgid; 89 uint16_t devid; 90 const char *name; 91 uint16_t size; /* in KB */ 92 uint16_t sector; /* in KB */ 93 uint16_t mhz; 94 } m25p_infos[] = { 95 { 0x16, 0x20, 0x2017, "STMicro M25P64", 8192, 64 }, /* 64Mbit */ 96 { 0x14, 0x20, 0x2015, "STMicro M25P16", 2048, 64 }, /* 16Mbit */ 97 { 0x12, 0x20, 0x2013, "STMicro M25P40", 512, 64 }, /* 4Mbit */ 98 { 0xc0, 0x20, 0x7117, "STMicro M25PX64", 8192, 64 }, /* 64Mbit */ 99 { 0x00, 0x20, 0xBA18, "Micron MT25QL128", 16384, 64 }, /* 128Mbit (3V) */ 100 { 0x00, 0x20, 0xBB18, "Micron MT25QU128", 16384, 64 }, /* 128Mbit (1.8V) */ 101 { 0x00, 0xBF, 0x2541, "Microchip SST25VF016B", 2048, 64 }, /* 16Mbit */ 102 { 0x13, 0xEF, 0x4014, "Winbond W25Q80.V", 1024, 64 }, /* 8Mbit */ 103 { 0x14, 0xEF, 0x4015, "Winbond W25Q16.V", 2048, 64 }, /* 16Mbit */ 104 { 0x15, 0xEF, 0x4016, "Winbond W25Q32.V", 4096, 64 }, /* 32Mbit */ 105 { 0x15, 0xEF, 0x6016, "Winbond W25Q32.W", 4096, 64 }, /* 32Mbit */ 106 { 0 } 107 }; 108 109 static int 110 m25p_match(device_t parent, cfdata_t cf, void *aux) 111 { 112 struct spi_attach_args *sa = aux; 113 114 /* configure for 20MHz, which is the max for normal reads */ 115 if (spi_configure(sa->sa_handle, SPI_MODE_0, 20000000)) 116 return 0; 117 118 return 1; 119 } 120 121 static void 122 m25p_attach(device_t parent, device_t self, void *aux) 123 { 124 struct m25p_softc *sc = device_private(self); 125 struct spi_attach_args *sa = aux; 126 127 sc->sc_sh = sa->sa_handle; 128 129 config_interrupts(self, m25p_doattach); 130 } 131 132 static void 133 m25p_doattach(device_t self) 134 { 135 struct m25p_softc *sc = device_private(self); 136 const struct m25p_info *info; 137 uint8_t buf[4]; 138 uint8_t cmd; 139 uint8_t mfgid; 140 uint8_t sig; 141 uint16_t devid; 142 143 /* first we try JEDEC ID read */ 144 cmd = SPIFLASH_CMD_RDJI; 145 if (spi_send_recv(sc->sc_sh, 1, &cmd, 3, buf)) { 146 aprint_error(": failed to get JEDEC identification\n"); 147 return; 148 } 149 mfgid = buf[0]; 150 devid = ((uint16_t)buf[1] << 8) | buf[2]; 151 152 if ((mfgid == 0xff) || (mfgid == 0)) { 153 cmd = SPIFLASH_CMD_RDID; 154 if (spi_send_recv(sc->sc_sh, 1, &cmd, 4, buf)) { 155 aprint_error(": failed to get legacy signature\n"); 156 return; 157 } 158 sig = buf[3]; 159 } else { 160 sig = 0; 161 } 162 163 /* okay did it match */ 164 for (info = m25p_infos; info->name; info++) { 165 if ((info->mfgid == mfgid) && (info->devid == devid)) 166 break; 167 if ((sig != 0) && (sig == info->sig)) 168 break; 169 } 170 171 if (info->name == NULL) { 172 aprint_error(": unknown or unsupported device\n"); 173 return; 174 } 175 176 sc->sc_name = info->name; 177 sc->sc_sizes[SPIFLASH_SIZE_DEVICE] = info->size * 1024; 178 sc->sc_sizes[SPIFLASH_SIZE_ERASE] = info->sector * 1024; 179 sc->sc_sizes[SPIFLASH_SIZE_WRITE] = 256; 180 sc->sc_sizes[SPIFLASH_SIZE_READ] = -1; 181 182 sc->sc_flags = SPIFLASH_FLAG_FAST_READ; 183 184 aprint_normal_dev(self, "JEDEC ID mfgid:0x%02X, devid:0x%04X", 185 mfgid, devid); 186 aprint_normal("\n"); 187 188 spiflash_attach_mi(&m25p_hw_if, sc, self); 189 } 190 191 const char * 192 m25p_getname(void *cookie) 193 { 194 struct m25p_softc *sc = cookie; 195 196 return (sc->sc_name); 197 } 198 199 struct spi_handle * 200 m25p_gethandle(void *cookie) 201 { 202 struct m25p_softc *sc = cookie; 203 204 return (sc->sc_sh); 205 } 206 207 int 208 m25p_getflags(void *cookie) 209 { 210 struct m25p_softc *sc = cookie; 211 212 return (sc->sc_flags); 213 } 214 215 int 216 m25p_getsize(void *cookie, int idx) 217 { 218 struct m25p_softc *sc = cookie; 219 220 if ((idx < 0) || (idx >= SPIFLASH_SIZE_COUNT)) 221 return -1; 222 return (sc->sc_sizes[idx]); 223 } 224
Indexes created Wed Oct 15 03:09:54 GMT 2025