Blame view
drivers/rtc/rtc-v3020.c
6.07 KB
362600fe6 [PATCH] Add v3020... |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
/* drivers/rtc/rtc-v3020.c * * Copyright (C) 2006 8D Technologies inc. * Copyright (C) 2004 Compulab Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Driver for the V3020 RTC * * Changelog: * * 10-May-2006: Raphael Assenat <raph@8d.com> * - Converted to platform driver * - Use the generic rtc class * * ??-???-2004: Someone at Compulab * - Initial driver creation. * */ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/init.h> #include <linux/rtc.h> #include <linux/types.h> #include <linux/bcd.h> #include <linux/rtc-v3020.h> |
f3d79b20d RTC v3020 fixes |
29 |
#include <linux/delay.h> |
362600fe6 [PATCH] Add v3020... |
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 |
#include <asm/io.h> #undef DEBUG struct v3020 { void __iomem *ioaddress; int leftshift; struct rtc_device *rtc; }; static void v3020_set_reg(struct v3020 *chip, unsigned char address, unsigned char data) { int i; unsigned char tmp; tmp = address; for (i = 0; i < 4; i++) { writel((tmp & 1) << chip->leftshift, chip->ioaddress); tmp >>= 1; |
f3d79b20d RTC v3020 fixes |
51 |
udelay(1); |
362600fe6 [PATCH] Add v3020... |
52 53 54 55 56 57 58 |
} /* Commands dont have data */ if (!V3020_IS_COMMAND(address)) { for (i = 0; i < 8; i++) { writel((data & 1) << chip->leftshift, chip->ioaddress); data >>= 1; |
f3d79b20d RTC v3020 fixes |
59 |
udelay(1); |
362600fe6 [PATCH] Add v3020... |
60 61 62 63 64 65 66 67 68 69 70 71 |
} } } static unsigned char v3020_get_reg(struct v3020 *chip, unsigned char address) { unsigned int data=0; int i; for (i = 0; i < 4; i++) { writel((address & 1) << chip->leftshift, chip->ioaddress); address >>= 1; |
f3d79b20d RTC v3020 fixes |
72 |
udelay(1); |
362600fe6 [PATCH] Add v3020... |
73 74 75 76 77 78 |
} for (i = 0; i < 8; i++) { data >>= 1; if (readl(chip->ioaddress) & (1 << chip->leftshift)) data |= 0x80; |
f3d79b20d RTC v3020 fixes |
79 |
udelay(1); |
362600fe6 [PATCH] Add v3020... |
80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 |
} return data; } static int v3020_read_time(struct device *dev, struct rtc_time *dt) { struct v3020 *chip = dev_get_drvdata(dev); int tmp; /* Copy the current time to ram... */ v3020_set_reg(chip, V3020_CMD_CLOCK2RAM, 0); /* ...and then read constant values. */ tmp = v3020_get_reg(chip, V3020_SECONDS); |
fe20ba70a drivers/rtc/: use... |
95 |
dt->tm_sec = bcd2bin(tmp); |
362600fe6 [PATCH] Add v3020... |
96 |
tmp = v3020_get_reg(chip, V3020_MINUTES); |
fe20ba70a drivers/rtc/: use... |
97 |
dt->tm_min = bcd2bin(tmp); |
362600fe6 [PATCH] Add v3020... |
98 |
tmp = v3020_get_reg(chip, V3020_HOURS); |
fe20ba70a drivers/rtc/: use... |
99 |
dt->tm_hour = bcd2bin(tmp); |
362600fe6 [PATCH] Add v3020... |
100 |
tmp = v3020_get_reg(chip, V3020_MONTH_DAY); |
fe20ba70a drivers/rtc/: use... |
101 |
dt->tm_mday = bcd2bin(tmp); |
362600fe6 [PATCH] Add v3020... |
102 |
tmp = v3020_get_reg(chip, V3020_MONTH); |
fe20ba70a drivers/rtc/: use... |
103 |
dt->tm_mon = bcd2bin(tmp) - 1; |
362600fe6 [PATCH] Add v3020... |
104 |
tmp = v3020_get_reg(chip, V3020_WEEK_DAY); |
fe20ba70a drivers/rtc/: use... |
105 |
dt->tm_wday = bcd2bin(tmp); |
362600fe6 [PATCH] Add v3020... |
106 |
tmp = v3020_get_reg(chip, V3020_YEAR); |
fe20ba70a drivers/rtc/: use... |
107 |
dt->tm_year = bcd2bin(tmp)+100; |
362600fe6 [PATCH] Add v3020... |
108 109 |
#ifdef DEBUG |
2a4e2b878 rtc: replace rema... |
110 111 112 |
printk(" %s : Read RTC values ",__func__); |
362600fe6 [PATCH] Add v3020... |
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 |
printk("tm_hour: %i ",dt->tm_hour); printk("tm_min : %i ",dt->tm_min); printk("tm_sec : %i ",dt->tm_sec); printk("tm_year: %i ",dt->tm_year); printk("tm_mon : %i ",dt->tm_mon); printk("tm_mday: %i ",dt->tm_mday); printk("tm_wday: %i ",dt->tm_wday); #endif return 0; } static int v3020_set_time(struct device *dev, struct rtc_time *dt) { struct v3020 *chip = dev_get_drvdata(dev); #ifdef DEBUG |
2a4e2b878 rtc: replace rema... |
138 139 140 |
printk(" %s : Setting RTC values ",__func__); |
362600fe6 [PATCH] Add v3020... |
141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 |
printk("tm_sec : %i ",dt->tm_sec); printk("tm_min : %i ",dt->tm_min); printk("tm_hour: %i ",dt->tm_hour); printk("tm_mday: %i ",dt->tm_mday); printk("tm_wday: %i ",dt->tm_wday); printk("tm_year: %i ",dt->tm_year); #endif /* Write all the values to ram... */ |
fe20ba70a drivers/rtc/: use... |
156 157 158 159 160 161 162 |
v3020_set_reg(chip, V3020_SECONDS, bin2bcd(dt->tm_sec)); v3020_set_reg(chip, V3020_MINUTES, bin2bcd(dt->tm_min)); v3020_set_reg(chip, V3020_HOURS, bin2bcd(dt->tm_hour)); v3020_set_reg(chip, V3020_MONTH_DAY, bin2bcd(dt->tm_mday)); v3020_set_reg(chip, V3020_MONTH, bin2bcd(dt->tm_mon + 1)); v3020_set_reg(chip, V3020_WEEK_DAY, bin2bcd(dt->tm_wday)); v3020_set_reg(chip, V3020_YEAR, bin2bcd(dt->tm_year % 100)); |
362600fe6 [PATCH] Add v3020... |
163 164 165 166 167 168 169 170 171 172 |
/* ...and set the clock. */ v3020_set_reg(chip, V3020_CMD_RAM2CLOCK, 0); /* Compulab used this delay here. I dont know why, * the datasheet does not specify a delay. */ /*mdelay(5);*/ return 0; } |
ff8371ac9 [PATCH] constify ... |
173 |
static const struct rtc_class_ops v3020_rtc_ops = { |
362600fe6 [PATCH] Add v3020... |
174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 |
.read_time = v3020_read_time, .set_time = v3020_set_time, }; static int rtc_probe(struct platform_device *pdev) { struct v3020_platform_data *pdata = pdev->dev.platform_data; struct v3020 *chip; struct rtc_device *rtc; int retval = -EBUSY; int i; int temp; if (pdev->num_resources != 1) return -EBUSY; if (pdev->resource[0].flags != IORESOURCE_MEM) return -EBUSY; |
362600fe6 [PATCH] Add v3020... |
192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 |
chip = kzalloc(sizeof *chip, GFP_KERNEL); if (!chip) return -ENOMEM; chip->leftshift = pdata->leftshift; chip->ioaddress = ioremap(pdev->resource[0].start, 1); if (chip->ioaddress == NULL) goto err_chip; /* Make sure the v3020 expects a communication cycle * by reading 8 times */ for (i = 0; i < 8; i++) temp = readl(chip->ioaddress); /* Test chip by doing a write/read sequence * to the chip ram */ v3020_set_reg(chip, V3020_SECONDS, 0x33); if(v3020_get_reg(chip, V3020_SECONDS) != 0x33) { retval = -ENODEV; goto err_io; } /* Make sure frequency measurment mode, test modes, and lock * are all disabled */ v3020_set_reg(chip, V3020_STATUS_0, 0x0); |
6a15f46c1 [PATCH] rtc: fix ... |
217 |
dev_info(&pdev->dev, "Chip available at physical address 0x%llx," |
362600fe6 [PATCH] Add v3020... |
218 219 |
"data connected to D%d ", |
6a15f46c1 [PATCH] rtc: fix ... |
220 |
(unsigned long long)pdev->resource[0].start, |
362600fe6 [PATCH] Add v3020... |
221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 |
chip->leftshift); platform_set_drvdata(pdev, chip); rtc = rtc_device_register("v3020", &pdev->dev, &v3020_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { retval = PTR_ERR(rtc); goto err_io; } chip->rtc = rtc; return 0; err_io: iounmap(chip->ioaddress); err_chip: kfree(chip); return retval; } static int rtc_remove(struct platform_device *dev) { struct v3020 *chip = platform_get_drvdata(dev); struct rtc_device *rtc = chip->rtc; if (rtc) rtc_device_unregister(rtc); iounmap(chip->ioaddress); kfree(chip); return 0; } static struct platform_driver rtc_device_driver = { .probe = rtc_probe, .remove = rtc_remove, .driver = { .name = "v3020", .owner = THIS_MODULE, }, }; static __init int v3020_init(void) { return platform_driver_register(&rtc_device_driver); } static __exit void v3020_exit(void) { platform_driver_unregister(&rtc_device_driver); } module_init(v3020_init); module_exit(v3020_exit); MODULE_DESCRIPTION("V3020 RTC"); MODULE_AUTHOR("Raphael Assenat"); MODULE_LICENSE("GPL"); |
ad28a07bc rtc: fix platform... |
282 |
MODULE_ALIAS("platform:v3020"); |