Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License version 2 as |
| 4 | * published by the Free Software Foundation. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, |
| 7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 9 | * GNU General Public License for more details. |
| 10 | * |
| 11 | * Copyright (C) 2012 ARM Limited |
| 12 | */ |
| 13 | |
| 14 | #include <linux/err.h> |
| 15 | #include <linux/gpio.h> |
| 16 | #include <linux/io.h> |
| 17 | #include <linux/leds.h> |
| 18 | #include <linux/of_address.h> |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 19 | #include <linux/of_platform.h> |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/regulator/driver.h> |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 22 | #include <linux/sched.h> |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 23 | #include <linux/slab.h> |
| 24 | #include <linux/stat.h> |
| 25 | #include <linux/timer.h> |
| 26 | #include <linux/vexpress.h> |
| 27 | |
| 28 | #define SYS_ID 0x000 |
| 29 | #define SYS_SW 0x004 |
| 30 | #define SYS_LED 0x008 |
| 31 | #define SYS_100HZ 0x024 |
| 32 | #define SYS_FLAGS 0x030 |
| 33 | #define SYS_FLAGSSET 0x030 |
| 34 | #define SYS_FLAGSCLR 0x034 |
| 35 | #define SYS_NVFLAGS 0x038 |
| 36 | #define SYS_NVFLAGSSET 0x038 |
| 37 | #define SYS_NVFLAGSCLR 0x03c |
| 38 | #define SYS_MCI 0x048 |
| 39 | #define SYS_FLASH 0x04c |
| 40 | #define SYS_CFGSW 0x058 |
| 41 | #define SYS_24MHZ 0x05c |
| 42 | #define SYS_MISC 0x060 |
| 43 | #define SYS_DMA 0x064 |
| 44 | #define SYS_PROCID0 0x084 |
| 45 | #define SYS_PROCID1 0x088 |
| 46 | #define SYS_CFGDATA 0x0a0 |
| 47 | #define SYS_CFGCTRL 0x0a4 |
| 48 | #define SYS_CFGSTAT 0x0a8 |
| 49 | |
| 50 | #define SYS_HBI_MASK 0xfff |
| 51 | #define SYS_ID_HBI_SHIFT 16 |
| 52 | #define SYS_PROCIDx_HBI_SHIFT 0 |
| 53 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 54 | #define SYS_LED_LED(n) (1 << (n)) |
| 55 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 56 | #define SYS_MCI_CARDIN (1 << 0) |
| 57 | #define SYS_MCI_WPROT (1 << 1) |
| 58 | |
| 59 | #define SYS_FLASH_WPn (1 << 0) |
| 60 | |
| 61 | #define SYS_MISC_MASTERSITE (1 << 14) |
| 62 | |
| 63 | #define SYS_CFGCTRL_START (1 << 31) |
| 64 | #define SYS_CFGCTRL_WRITE (1 << 30) |
| 65 | #define SYS_CFGCTRL_DCC(n) (((n) & 0xf) << 26) |
| 66 | #define SYS_CFGCTRL_FUNC(n) (((n) & 0x3f) << 20) |
| 67 | #define SYS_CFGCTRL_SITE(n) (((n) & 0x3) << 16) |
| 68 | #define SYS_CFGCTRL_POSITION(n) (((n) & 0xf) << 12) |
| 69 | #define SYS_CFGCTRL_DEVICE(n) (((n) & 0xfff) << 0) |
| 70 | |
| 71 | #define SYS_CFGSTAT_ERR (1 << 1) |
| 72 | #define SYS_CFGSTAT_COMPLETE (1 << 0) |
| 73 | |
| 74 | |
| 75 | static void __iomem *vexpress_sysreg_base; |
| 76 | static struct device *vexpress_sysreg_dev; |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 77 | static LIST_HEAD(vexpress_sysreg_config_funcs); |
| 78 | static struct device *vexpress_sysreg_config_bridge; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 79 | |
| 80 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 81 | static int vexpress_sysreg_get_master(void) |
| 82 | { |
| 83 | if (readl(vexpress_sysreg_base + SYS_MISC) & SYS_MISC_MASTERSITE) |
| 84 | return VEXPRESS_SITE_DB2; |
| 85 | |
| 86 | return VEXPRESS_SITE_DB1; |
| 87 | } |
| 88 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 89 | void vexpress_flags_set(u32 data) |
| 90 | { |
| 91 | writel(~0, vexpress_sysreg_base + SYS_FLAGSCLR); |
| 92 | writel(data, vexpress_sysreg_base + SYS_FLAGSSET); |
| 93 | } |
| 94 | |
| 95 | u32 vexpress_get_procid(int site) |
| 96 | { |
| 97 | if (site == VEXPRESS_SITE_MASTER) |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 98 | site = vexpress_sysreg_get_master(); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 99 | |
| 100 | return readl(vexpress_sysreg_base + (site == VEXPRESS_SITE_DB1 ? |
| 101 | SYS_PROCID0 : SYS_PROCID1)); |
| 102 | } |
| 103 | |
| 104 | u32 vexpress_get_hbi(int site) |
| 105 | { |
| 106 | u32 id; |
| 107 | |
| 108 | switch (site) { |
| 109 | case VEXPRESS_SITE_MB: |
| 110 | id = readl(vexpress_sysreg_base + SYS_ID); |
| 111 | return (id >> SYS_ID_HBI_SHIFT) & SYS_HBI_MASK; |
| 112 | case VEXPRESS_SITE_MASTER: |
| 113 | case VEXPRESS_SITE_DB1: |
| 114 | case VEXPRESS_SITE_DB2: |
| 115 | id = vexpress_get_procid(site); |
| 116 | return (id >> SYS_PROCIDx_HBI_SHIFT) & SYS_HBI_MASK; |
| 117 | } |
| 118 | |
| 119 | return ~0; |
| 120 | } |
| 121 | |
| 122 | void __iomem *vexpress_get_24mhz_clock_base(void) |
| 123 | { |
| 124 | return vexpress_sysreg_base + SYS_24MHZ; |
| 125 | } |
| 126 | |
| 127 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 128 | struct vexpress_sysreg_config_func { |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 129 | struct list_head list; |
| 130 | struct regmap *regmap; |
| 131 | int num_templates; |
| 132 | u32 template[0]; /* Keep this last */ |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 133 | }; |
| 134 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 135 | static int vexpress_sysreg_config_exec(struct vexpress_sysreg_config_func *func, |
| 136 | int index, bool write, u32 *data) |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 137 | { |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 138 | u32 command, status; |
| 139 | int tries; |
| 140 | long timeout; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 141 | |
| 142 | if (WARN_ON(!vexpress_sysreg_base)) |
| 143 | return -ENOENT; |
| 144 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 145 | if (WARN_ON(index > func->num_templates)) |
| 146 | return -EINVAL; |
| 147 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 148 | command = readl(vexpress_sysreg_base + SYS_CFGCTRL); |
| 149 | if (WARN_ON(command & SYS_CFGCTRL_START)) |
| 150 | return -EBUSY; |
| 151 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 152 | command = func->template[index]; |
| 153 | command |= SYS_CFGCTRL_START; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 154 | command |= write ? SYS_CFGCTRL_WRITE : 0; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 155 | |
| 156 | /* Use a canary for reads */ |
| 157 | if (!write) |
| 158 | *data = 0xdeadbeef; |
| 159 | |
| 160 | dev_dbg(vexpress_sysreg_dev, "command %x, data %x\n", |
| 161 | command, *data); |
| 162 | writel(*data, vexpress_sysreg_base + SYS_CFGDATA); |
| 163 | writel(0, vexpress_sysreg_base + SYS_CFGSTAT); |
| 164 | writel(command, vexpress_sysreg_base + SYS_CFGCTRL); |
| 165 | mb(); |
| 166 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 167 | /* The operation can take ages... Go to sleep, 100us initially */ |
| 168 | tries = 100; |
| 169 | timeout = 100; |
| 170 | do { |
| 171 | set_current_state(TASK_INTERRUPTIBLE); |
| 172 | schedule_timeout(usecs_to_jiffies(timeout)); |
| 173 | if (signal_pending(current)) |
| 174 | return -EINTR; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 175 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 176 | status = readl(vexpress_sysreg_base + SYS_CFGSTAT); |
| 177 | if (status & SYS_CFGSTAT_ERR) |
| 178 | return -EFAULT; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 179 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 180 | if (timeout > 20) |
| 181 | timeout -= 20; |
| 182 | } while (--tries && !(status & SYS_CFGSTAT_COMPLETE)); |
| 183 | if (WARN_ON_ONCE(!tries)) |
| 184 | return -ETIMEDOUT; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 185 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 186 | if (!write) { |
| 187 | *data = readl(vexpress_sysreg_base + SYS_CFGDATA); |
| 188 | dev_dbg(vexpress_sysreg_dev, "func %p, read data %x\n", |
| 189 | func, *data); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 190 | } |
| 191 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 192 | return 0; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 193 | } |
| 194 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 195 | static int vexpress_sysreg_config_read(void *context, unsigned int index, |
| 196 | unsigned int *val) |
| 197 | { |
| 198 | struct vexpress_sysreg_config_func *func = context; |
| 199 | |
| 200 | return vexpress_sysreg_config_exec(func, index, false, val); |
| 201 | } |
| 202 | |
| 203 | static int vexpress_sysreg_config_write(void *context, unsigned int index, |
| 204 | unsigned int val) |
| 205 | { |
| 206 | struct vexpress_sysreg_config_func *func = context; |
| 207 | |
| 208 | return vexpress_sysreg_config_exec(func, index, true, &val); |
| 209 | } |
| 210 | |
| 211 | struct regmap_config vexpress_sysreg_regmap_config = { |
| 212 | .lock = vexpress_config_lock, |
| 213 | .unlock = vexpress_config_unlock, |
| 214 | .reg_bits = 32, |
| 215 | .val_bits = 32, |
| 216 | .reg_read = vexpress_sysreg_config_read, |
| 217 | .reg_write = vexpress_sysreg_config_write, |
| 218 | .reg_format_endian = REGMAP_ENDIAN_LITTLE, |
| 219 | .val_format_endian = REGMAP_ENDIAN_LITTLE, |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 220 | }; |
| 221 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 222 | static struct regmap *vexpress_sysreg_config_regmap_init(struct device *dev, |
| 223 | void *context) |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 224 | { |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 225 | struct platform_device *pdev = to_platform_device(dev); |
| 226 | struct vexpress_sysreg_config_func *func; |
| 227 | struct property *prop; |
| 228 | const __be32 *val = NULL; |
| 229 | __be32 energy_quirk[4]; |
| 230 | int num; |
| 231 | u32 site, position, dcc; |
| 232 | int err; |
| 233 | int i; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 234 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 235 | if (dev->of_node) { |
| 236 | err = vexpress_config_get_topo(dev->of_node, &site, &position, |
| 237 | &dcc); |
| 238 | if (err) |
| 239 | return ERR_PTR(err); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 240 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 241 | prop = of_find_property(dev->of_node, |
| 242 | "arm,vexpress-sysreg,func", NULL); |
| 243 | if (!prop) |
| 244 | return ERR_PTR(-EINVAL); |
| 245 | |
| 246 | num = prop->length / sizeof(u32) / 2; |
| 247 | val = prop->value; |
| 248 | } else { |
| 249 | if (pdev->num_resources != 1 || |
| 250 | pdev->resource[0].flags != IORESOURCE_BUS) |
| 251 | return ERR_PTR(-EFAULT); |
| 252 | |
| 253 | site = pdev->resource[0].start; |
| 254 | if (site == VEXPRESS_SITE_MASTER) |
| 255 | site = vexpress_sysreg_get_master(); |
| 256 | position = 0; |
| 257 | dcc = 0; |
| 258 | num = 1; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 259 | } |
| 260 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 261 | /* |
| 262 | * "arm,vexpress-energy" function used to be described |
| 263 | * by its first device only, now it requires both |
| 264 | */ |
| 265 | if (num == 1 && of_device_is_compatible(dev->of_node, |
| 266 | "arm,vexpress-energy")) { |
| 267 | num = 2; |
| 268 | energy_quirk[0] = *val; |
| 269 | energy_quirk[2] = *val++; |
| 270 | energy_quirk[1] = *val; |
| 271 | energy_quirk[3] = cpu_to_be32(be32_to_cpup(val) + 1); |
| 272 | val = energy_quirk; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 273 | } |
| 274 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 275 | func = kzalloc(sizeof(*func) + sizeof(*func->template) * num, |
| 276 | GFP_KERNEL); |
| 277 | if (!func) |
| 278 | return NULL; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 279 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 280 | func->num_templates = num; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 281 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 282 | for (i = 0; i < num; i++) { |
| 283 | u32 function, device; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 284 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 285 | if (dev->of_node) { |
| 286 | function = be32_to_cpup(val++); |
| 287 | device = be32_to_cpup(val++); |
| 288 | } else { |
| 289 | function = pdev->resource[0].end; |
| 290 | device = pdev->id; |
| 291 | } |
| 292 | |
| 293 | dev_dbg(dev, "func %p: %u/%u/%u/%u/%u\n", |
| 294 | func, site, position, dcc, |
| 295 | function, device); |
| 296 | |
| 297 | func->template[i] = SYS_CFGCTRL_DCC(dcc); |
| 298 | func->template[i] |= SYS_CFGCTRL_SITE(site); |
| 299 | func->template[i] |= SYS_CFGCTRL_POSITION(position); |
| 300 | func->template[i] |= SYS_CFGCTRL_FUNC(function); |
| 301 | func->template[i] |= SYS_CFGCTRL_DEVICE(device); |
| 302 | } |
| 303 | |
| 304 | vexpress_sysreg_regmap_config.max_register = num - 1; |
| 305 | |
| 306 | func->regmap = regmap_init(dev, NULL, func, |
| 307 | &vexpress_sysreg_regmap_config); |
| 308 | |
| 309 | if (IS_ERR(func->regmap)) |
| 310 | kfree(func); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 311 | else |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 312 | list_add(&func->list, &vexpress_sysreg_config_funcs); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 313 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 314 | return func->regmap; |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 315 | } |
| 316 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 317 | static void vexpress_sysreg_config_regmap_exit(struct regmap *regmap, |
| 318 | void *context) |
| 319 | { |
| 320 | struct vexpress_sysreg_config_func *func, *tmp; |
| 321 | |
| 322 | regmap_exit(regmap); |
| 323 | |
| 324 | list_for_each_entry_safe(func, tmp, &vexpress_sysreg_config_funcs, |
| 325 | list) { |
| 326 | if (func->regmap == regmap) { |
| 327 | list_del(&vexpress_sysreg_config_funcs); |
| 328 | kfree(func); |
| 329 | break; |
| 330 | } |
| 331 | } |
| 332 | } |
| 333 | |
| 334 | static struct vexpress_config_bridge_ops vexpress_sysreg_config_bridge_ops = { |
| 335 | .regmap_init = vexpress_sysreg_config_regmap_init, |
| 336 | .regmap_exit = vexpress_sysreg_config_regmap_exit, |
| 337 | }; |
| 338 | |
| 339 | int vexpress_sysreg_config_device_register(struct platform_device *pdev) |
| 340 | { |
| 341 | pdev->dev.parent = vexpress_sysreg_config_bridge; |
| 342 | |
| 343 | return platform_device_register(pdev); |
| 344 | } |
| 345 | |
| 346 | |
Pawel Moll | 5266629 | 2012-11-27 16:48:50 +0000 | [diff] [blame] | 347 | void __init vexpress_sysreg_early_init(void __iomem *base) |
| 348 | { |
| 349 | vexpress_sysreg_base = base; |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 350 | vexpress_config_set_master(vexpress_sysreg_get_master()); |
Pawel Moll | 5266629 | 2012-11-27 16:48:50 +0000 | [diff] [blame] | 351 | } |
| 352 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 353 | void __init vexpress_sysreg_of_early_init(void) |
| 354 | { |
Catalin Marinas | dcd560c | 2013-02-04 18:08:02 +0000 | [diff] [blame] | 355 | struct device_node *node; |
Pawel Moll | 5266629 | 2012-11-27 16:48:50 +0000 | [diff] [blame] | 356 | |
Catalin Marinas | dcd560c | 2013-02-04 18:08:02 +0000 | [diff] [blame] | 357 | if (vexpress_sysreg_base) |
| 358 | return; |
| 359 | |
| 360 | node = of_find_compatible_node(NULL, NULL, "arm,vexpress-sysreg"); |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 361 | if (WARN_ON(!node)) |
| 362 | return; |
| 363 | |
| 364 | vexpress_sysreg_base = of_iomap(node, 0); |
| 365 | if (WARN_ON(!vexpress_sysreg_base)) |
| 366 | return; |
| 367 | |
| 368 | vexpress_config_set_master(vexpress_sysreg_get_master()); |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | |
Pawel Moll | 8eb12b9 | 2013-06-11 11:56:02 +0100 | [diff] [blame] | 372 | #ifdef CONFIG_GPIOLIB |
| 373 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 374 | #define VEXPRESS_SYSREG_GPIO(_name, _reg, _value) \ |
| 375 | [VEXPRESS_GPIO_##_name] = { \ |
| 376 | .reg = _reg, \ |
| 377 | .value = _reg##_##_value, \ |
| 378 | } |
| 379 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 380 | static struct vexpress_sysreg_gpio { |
| 381 | unsigned long reg; |
| 382 | u32 value; |
| 383 | } vexpress_sysreg_gpios[] = { |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 384 | VEXPRESS_SYSREG_GPIO(MMC_CARDIN, SYS_MCI, CARDIN), |
| 385 | VEXPRESS_SYSREG_GPIO(MMC_WPROT, SYS_MCI, WPROT), |
| 386 | VEXPRESS_SYSREG_GPIO(FLASH_WPn, SYS_FLASH, WPn), |
| 387 | VEXPRESS_SYSREG_GPIO(LED0, SYS_LED, LED(0)), |
| 388 | VEXPRESS_SYSREG_GPIO(LED1, SYS_LED, LED(1)), |
| 389 | VEXPRESS_SYSREG_GPIO(LED2, SYS_LED, LED(2)), |
| 390 | VEXPRESS_SYSREG_GPIO(LED3, SYS_LED, LED(3)), |
| 391 | VEXPRESS_SYSREG_GPIO(LED4, SYS_LED, LED(4)), |
| 392 | VEXPRESS_SYSREG_GPIO(LED5, SYS_LED, LED(5)), |
| 393 | VEXPRESS_SYSREG_GPIO(LED6, SYS_LED, LED(6)), |
| 394 | VEXPRESS_SYSREG_GPIO(LED7, SYS_LED, LED(7)), |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 395 | }; |
| 396 | |
| 397 | static int vexpress_sysreg_gpio_direction_input(struct gpio_chip *chip, |
| 398 | unsigned offset) |
| 399 | { |
| 400 | return 0; |
| 401 | } |
| 402 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 403 | static int vexpress_sysreg_gpio_get(struct gpio_chip *chip, |
| 404 | unsigned offset) |
| 405 | { |
| 406 | struct vexpress_sysreg_gpio *gpio = &vexpress_sysreg_gpios[offset]; |
| 407 | u32 reg_value = readl(vexpress_sysreg_base + gpio->reg); |
| 408 | |
| 409 | return !!(reg_value & gpio->value); |
| 410 | } |
| 411 | |
| 412 | static void vexpress_sysreg_gpio_set(struct gpio_chip *chip, |
| 413 | unsigned offset, int value) |
| 414 | { |
| 415 | struct vexpress_sysreg_gpio *gpio = &vexpress_sysreg_gpios[offset]; |
| 416 | u32 reg_value = readl(vexpress_sysreg_base + gpio->reg); |
| 417 | |
| 418 | if (value) |
| 419 | reg_value |= gpio->value; |
| 420 | else |
| 421 | reg_value &= ~gpio->value; |
| 422 | |
| 423 | writel(reg_value, vexpress_sysreg_base + gpio->reg); |
| 424 | } |
| 425 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 426 | static int vexpress_sysreg_gpio_direction_output(struct gpio_chip *chip, |
| 427 | unsigned offset, int value) |
| 428 | { |
| 429 | vexpress_sysreg_gpio_set(chip, offset, value); |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 434 | static struct gpio_chip vexpress_sysreg_gpio_chip = { |
| 435 | .label = "vexpress-sysreg", |
| 436 | .direction_input = vexpress_sysreg_gpio_direction_input, |
| 437 | .direction_output = vexpress_sysreg_gpio_direction_output, |
| 438 | .get = vexpress_sysreg_gpio_get, |
| 439 | .set = vexpress_sysreg_gpio_set, |
| 440 | .ngpio = ARRAY_SIZE(vexpress_sysreg_gpios), |
| 441 | .base = 0, |
| 442 | }; |
| 443 | |
| 444 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 445 | #define VEXPRESS_SYSREG_GREEN_LED(_name, _default_trigger, _gpio) \ |
| 446 | { \ |
| 447 | .name = "v2m:green:"_name, \ |
| 448 | .default_trigger = _default_trigger, \ |
| 449 | .gpio = VEXPRESS_GPIO_##_gpio, \ |
| 450 | } |
| 451 | |
| 452 | struct gpio_led vexpress_sysreg_leds[] = { |
| 453 | VEXPRESS_SYSREG_GREEN_LED("user1", "heartbeat", LED0), |
| 454 | VEXPRESS_SYSREG_GREEN_LED("user2", "mmc0", LED1), |
| 455 | VEXPRESS_SYSREG_GREEN_LED("user3", "cpu0", LED2), |
| 456 | VEXPRESS_SYSREG_GREEN_LED("user4", "cpu1", LED3), |
| 457 | VEXPRESS_SYSREG_GREEN_LED("user5", "cpu2", LED4), |
| 458 | VEXPRESS_SYSREG_GREEN_LED("user6", "cpu3", LED5), |
| 459 | VEXPRESS_SYSREG_GREEN_LED("user7", "cpu4", LED6), |
| 460 | VEXPRESS_SYSREG_GREEN_LED("user8", "cpu5", LED7), |
| 461 | }; |
| 462 | |
| 463 | struct gpio_led_platform_data vexpress_sysreg_leds_pdata = { |
| 464 | .num_leds = ARRAY_SIZE(vexpress_sysreg_leds), |
| 465 | .leds = vexpress_sysreg_leds, |
| 466 | }; |
| 467 | |
Pawel Moll | 8eb12b9 | 2013-06-11 11:56:02 +0100 | [diff] [blame] | 468 | #endif |
| 469 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 470 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 471 | static ssize_t vexpress_sysreg_sys_id_show(struct device *dev, |
| 472 | struct device_attribute *attr, char *buf) |
| 473 | { |
| 474 | return sprintf(buf, "0x%08x\n", readl(vexpress_sysreg_base + SYS_ID)); |
| 475 | } |
| 476 | |
| 477 | DEVICE_ATTR(sys_id, S_IRUGO, vexpress_sysreg_sys_id_show, NULL); |
| 478 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 479 | static int vexpress_sysreg_probe(struct platform_device *pdev) |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 480 | { |
| 481 | int err; |
| 482 | struct resource *res = platform_get_resource(pdev, |
| 483 | IORESOURCE_MEM, 0); |
| 484 | |
| 485 | if (!devm_request_mem_region(&pdev->dev, res->start, |
| 486 | resource_size(res), pdev->name)) { |
| 487 | dev_err(&pdev->dev, "Failed to request memory region!\n"); |
| 488 | return -EBUSY; |
| 489 | } |
| 490 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 491 | if (!vexpress_sysreg_base) |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 492 | vexpress_sysreg_base = devm_ioremap(&pdev->dev, res->start, |
| 493 | resource_size(res)); |
| 494 | |
| 495 | if (!vexpress_sysreg_base) { |
| 496 | dev_err(&pdev->dev, "Failed to obtain base address!\n"); |
| 497 | return -EFAULT; |
| 498 | } |
| 499 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 500 | vexpress_config_set_master(vexpress_sysreg_get_master()); |
Pawel Moll | 8eb12b9 | 2013-06-11 11:56:02 +0100 | [diff] [blame] | 501 | vexpress_sysreg_dev = &pdev->dev; |
| 502 | |
| 503 | #ifdef CONFIG_GPIOLIB |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 504 | vexpress_sysreg_gpio_chip.dev = &pdev->dev; |
| 505 | err = gpiochip_add(&vexpress_sysreg_gpio_chip); |
| 506 | if (err) { |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 507 | dev_err(&pdev->dev, "Failed to register GPIO chip! (%d)\n", |
| 508 | err); |
| 509 | return err; |
| 510 | } |
| 511 | |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 512 | platform_device_register_data(vexpress_sysreg_dev, "leds-gpio", |
| 513 | PLATFORM_DEVID_AUTO, &vexpress_sysreg_leds_pdata, |
| 514 | sizeof(vexpress_sysreg_leds_pdata)); |
Pawel Moll | 8eb12b9 | 2013-06-11 11:56:02 +0100 | [diff] [blame] | 515 | #endif |
Pawel Moll | 8ea402f | 2013-01-30 10:33:16 +0000 | [diff] [blame] | 516 | |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 517 | vexpress_sysreg_config_bridge = vexpress_config_bridge_register( |
| 518 | &pdev->dev, &vexpress_sysreg_config_bridge_ops, NULL); |
| 519 | WARN_ON(!vexpress_sysreg_config_bridge); |
| 520 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 521 | device_create_file(vexpress_sysreg_dev, &dev_attr_sys_id); |
| 522 | |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | static const struct of_device_id vexpress_sysreg_match[] = { |
| 527 | { .compatible = "arm,vexpress-sysreg", }, |
| 528 | {}, |
| 529 | }; |
| 530 | |
| 531 | static struct platform_driver vexpress_sysreg_driver = { |
| 532 | .driver = { |
| 533 | .name = "vexpress-sysreg", |
| 534 | .of_match_table = vexpress_sysreg_match, |
| 535 | }, |
| 536 | .probe = vexpress_sysreg_probe, |
| 537 | }; |
| 538 | |
| 539 | static int __init vexpress_sysreg_init(void) |
| 540 | { |
Pawel Moll | 3b9334a | 2014-04-30 16:46:29 +0100 | [diff] [blame^] | 541 | struct device_node *node; |
| 542 | |
| 543 | /* Need the sysreg early, before any other device... */ |
| 544 | for_each_matching_node(node, vexpress_sysreg_match) |
| 545 | of_platform_device_create(node, NULL, NULL); |
| 546 | |
Pawel Moll | 88e0abc | 2012-09-18 12:24:57 +0100 | [diff] [blame] | 547 | return platform_driver_register(&vexpress_sysreg_driver); |
| 548 | } |
| 549 | core_initcall(vexpress_sysreg_init); |