Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2009-2011 Wind River Systems, Inc. |
| 3 | * Copyright (c) 2011 ST Microelectronics (Alessandro Rubini) |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 12 | * See the GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | */ |
| 19 | |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/spinlock.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/device.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/list.h> |
| 27 | #include <linux/io.h> |
| 28 | #include <linux/ioport.h> |
| 29 | #include <linux/pci.h> |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 30 | #include <linux/seq_file.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/mfd/core.h> |
| 33 | #include <linux/mfd/sta2x11-mfd.h> |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 34 | #include <linux/regmap.h> |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 35 | |
| 36 | #include <asm/sta2x11.h> |
| 37 | |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 38 | static inline int __reg_within_range(unsigned int r, |
| 39 | unsigned int start, |
| 40 | unsigned int end) |
| 41 | { |
| 42 | return ((r >= start) && (r <= end)); |
| 43 | } |
| 44 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 45 | /* This describes STA2X11 MFD chip for us, we may have several */ |
| 46 | struct sta2x11_mfd { |
| 47 | struct sta2x11_instance *instance; |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 48 | struct regmap *regmap[sta2x11_n_mfd_plat_devs]; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 49 | spinlock_t lock; |
| 50 | struct list_head list; |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 51 | void __iomem *regs[sta2x11_n_mfd_plat_devs]; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | static LIST_HEAD(sta2x11_mfd_list); |
| 55 | |
| 56 | /* Three functions to act on the list */ |
| 57 | static struct sta2x11_mfd *sta2x11_mfd_find(struct pci_dev *pdev) |
| 58 | { |
| 59 | struct sta2x11_instance *instance; |
| 60 | struct sta2x11_mfd *mfd; |
| 61 | |
| 62 | if (!pdev && !list_empty(&sta2x11_mfd_list)) { |
| 63 | pr_warning("%s: Unspecified device, " |
| 64 | "using first instance\n", __func__); |
| 65 | return list_entry(sta2x11_mfd_list.next, |
| 66 | struct sta2x11_mfd, list); |
| 67 | } |
| 68 | |
| 69 | instance = sta2x11_get_instance(pdev); |
| 70 | if (!instance) |
| 71 | return NULL; |
| 72 | list_for_each_entry(mfd, &sta2x11_mfd_list, list) { |
| 73 | if (mfd->instance == instance) |
| 74 | return mfd; |
| 75 | } |
| 76 | return NULL; |
| 77 | } |
| 78 | |
| 79 | static int __devinit sta2x11_mfd_add(struct pci_dev *pdev, gfp_t flags) |
| 80 | { |
| 81 | struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev); |
| 82 | struct sta2x11_instance *instance; |
| 83 | |
| 84 | if (mfd) |
| 85 | return -EBUSY; |
| 86 | instance = sta2x11_get_instance(pdev); |
| 87 | if (!instance) |
| 88 | return -EINVAL; |
| 89 | mfd = kzalloc(sizeof(*mfd), flags); |
| 90 | if (!mfd) |
| 91 | return -ENOMEM; |
| 92 | INIT_LIST_HEAD(&mfd->list); |
| 93 | spin_lock_init(&mfd->lock); |
| 94 | mfd->instance = instance; |
| 95 | list_add(&mfd->list, &sta2x11_mfd_list); |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static int __devexit mfd_remove(struct pci_dev *pdev) |
| 100 | { |
| 101 | struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev); |
| 102 | |
| 103 | if (!mfd) |
| 104 | return -ENODEV; |
| 105 | list_del(&mfd->list); |
| 106 | kfree(mfd); |
| 107 | return 0; |
| 108 | } |
| 109 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 110 | /* This function is exported and is not expected to fail */ |
| 111 | u32 __sta2x11_mfd_mask(struct pci_dev *pdev, u32 reg, u32 mask, u32 val, |
| 112 | enum sta2x11_mfd_plat_dev index) |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 113 | { |
| 114 | struct sta2x11_mfd *mfd = sta2x11_mfd_find(pdev); |
| 115 | u32 r; |
| 116 | unsigned long flags; |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 117 | void __iomem *regs = mfd->regs[index]; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 118 | |
| 119 | if (!mfd) { |
| 120 | dev_warn(&pdev->dev, ": can't access sctl regs\n"); |
| 121 | return 0; |
| 122 | } |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 123 | if (!regs) { |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 124 | dev_warn(&pdev->dev, ": system ctl not initialized\n"); |
| 125 | return 0; |
| 126 | } |
| 127 | spin_lock_irqsave(&mfd->lock, flags); |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 128 | r = readl(regs + reg); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 129 | r &= ~mask; |
| 130 | r |= val; |
| 131 | if (mask) |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 132 | writel(r, regs + reg); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 133 | spin_unlock_irqrestore(&mfd->lock, flags); |
| 134 | return r; |
| 135 | } |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 136 | EXPORT_SYMBOL(__sta2x11_mfd_mask); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 137 | |
Davide Ciminaghi | 29f5b5a | 2012-11-09 15:19:54 +0100 | [diff] [blame] | 138 | int sta2x11_mfd_get_regs_data(struct platform_device *dev, |
| 139 | enum sta2x11_mfd_plat_dev index, |
| 140 | void __iomem **regs, |
| 141 | spinlock_t **lock) |
| 142 | { |
| 143 | struct pci_dev *pdev = *(struct pci_dev **)(dev->dev.platform_data); |
| 144 | struct sta2x11_mfd *mfd; |
| 145 | |
| 146 | if (!pdev) |
| 147 | return -ENODEV; |
| 148 | mfd = sta2x11_mfd_find(pdev); |
| 149 | if (!mfd) |
| 150 | return -ENODEV; |
| 151 | if (index >= sta2x11_n_mfd_plat_devs) |
| 152 | return -ENODEV; |
| 153 | *regs = mfd->regs[index]; |
| 154 | *lock = &mfd->lock[index]; |
| 155 | pr_debug("%s %d *regs = %p\n", __func__, __LINE__, *regs); |
| 156 | return *regs ? 0 : -ENODEV; |
| 157 | } |
| 158 | EXPORT_SYMBOL(sta2x11_mfd_get_regs_data); |
| 159 | |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 160 | /* |
| 161 | * Special sta2x11-mfd regmap lock/unlock functions |
| 162 | */ |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 163 | |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 164 | static void sta2x11_regmap_lock(void *__lock) |
| 165 | { |
| 166 | spinlock_t *lock = __lock; |
| 167 | spin_lock(lock); |
| 168 | } |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 169 | |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 170 | static void sta2x11_regmap_unlock(void *__lock) |
| 171 | { |
| 172 | spinlock_t *lock = __lock; |
| 173 | spin_unlock(lock); |
| 174 | } |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 175 | |
| 176 | static const char *sta2x11_mfd_names[sta2x11_n_mfd_plat_devs] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 177 | [sta2x11_sctl] = STA2X11_MFD_SCTL_NAME, |
| 178 | [sta2x11_apbreg] = STA2X11_MFD_APBREG_NAME, |
| 179 | [sta2x11_apb_soc_regs] = STA2X11_MFD_APB_SOC_REGS_NAME, |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 180 | }; |
| 181 | |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 182 | static bool sta2x11_sctl_writeable_reg(struct device *dev, unsigned int reg) |
| 183 | { |
| 184 | return !__reg_within_range(reg, SCTL_SCPCIECSBRST, SCTL_SCRSTSTA); |
| 185 | } |
| 186 | |
| 187 | static struct regmap_config sta2x11_sctl_regmap_config = { |
| 188 | .reg_bits = 32, |
| 189 | .reg_stride = 4, |
| 190 | .val_bits = 32, |
| 191 | .lock = sta2x11_regmap_lock, |
| 192 | .unlock = sta2x11_regmap_unlock, |
| 193 | .max_register = SCTL_SCRSTSTA, |
| 194 | .writeable_reg = sta2x11_sctl_writeable_reg, |
| 195 | }; |
| 196 | |
| 197 | static bool sta2x11_apbreg_readable_reg(struct device *dev, unsigned int reg) |
| 198 | { |
| 199 | /* Two blocks (CAN and MLB, SARAC) 0x100 bytes apart */ |
| 200 | if (reg >= APBREG_BSR_SARAC) |
| 201 | reg -= APBREG_BSR_SARAC; |
| 202 | switch (reg) { |
| 203 | case APBREG_BSR: |
| 204 | case APBREG_PAER: |
| 205 | case APBREG_PWAC: |
| 206 | case APBREG_PRAC: |
| 207 | case APBREG_PCG: |
| 208 | case APBREG_PUR: |
| 209 | case APBREG_EMU_PCG: |
| 210 | return true; |
| 211 | default: |
| 212 | return false; |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | static bool sta2x11_apbreg_writeable_reg(struct device *dev, unsigned int reg) |
| 217 | { |
| 218 | if (reg >= APBREG_BSR_SARAC) |
| 219 | reg -= APBREG_BSR_SARAC; |
| 220 | if (!sta2x11_apbreg_readable_reg(dev, reg)) |
| 221 | return false; |
| 222 | return reg != APBREG_PAER; |
| 223 | } |
| 224 | |
| 225 | static struct regmap_config sta2x11_apbreg_regmap_config = { |
| 226 | .reg_bits = 32, |
| 227 | .reg_stride = 4, |
| 228 | .val_bits = 32, |
| 229 | .lock = sta2x11_regmap_lock, |
| 230 | .unlock = sta2x11_regmap_unlock, |
| 231 | .max_register = APBREG_EMU_PCG_SARAC, |
| 232 | .readable_reg = sta2x11_apbreg_readable_reg, |
| 233 | .writeable_reg = sta2x11_apbreg_writeable_reg, |
| 234 | }; |
| 235 | |
| 236 | static bool sta2x11_apb_soc_regs_readable_reg(struct device *dev, |
| 237 | unsigned int reg) |
| 238 | { |
| 239 | return reg <= PCIE_SoC_INT_ROUTER_STATUS3_REG || |
| 240 | __reg_within_range(reg, DMA_IP_CTRL_REG, SPARE3_RESERVED) || |
| 241 | __reg_within_range(reg, MASTER_LOCK_REG, |
| 242 | SYSTEM_CONFIG_STATUS_REG) || |
| 243 | reg == MSP_CLK_CTRL_REG || |
| 244 | __reg_within_range(reg, COMPENSATION_REG1, TEST_CTL_REG); |
| 245 | } |
| 246 | |
| 247 | static bool sta2x11_apb_soc_regs_writeable_reg(struct device *dev, |
| 248 | unsigned int reg) |
| 249 | { |
| 250 | if (!sta2x11_apb_soc_regs_readable_reg(dev, reg)) |
| 251 | return false; |
| 252 | switch (reg) { |
| 253 | case PCIE_COMMON_CLOCK_CONFIG_0_4_0: |
| 254 | case SYSTEM_CONFIG_STATUS_REG: |
| 255 | case COMPENSATION_REG1: |
| 256 | case PCIE_SoC_INT_ROUTER_STATUS0_REG...PCIE_SoC_INT_ROUTER_STATUS3_REG: |
| 257 | case PCIE_PM_STATUS_0_PORT_0_4...PCIE_PM_STATUS_7_0_EP4: |
| 258 | return false; |
| 259 | default: |
| 260 | return true; |
| 261 | } |
| 262 | } |
| 263 | |
| 264 | static struct regmap_config sta2x11_apb_soc_regs_regmap_config = { |
| 265 | .reg_bits = 32, |
| 266 | .reg_stride = 4, |
| 267 | .val_bits = 32, |
| 268 | .lock = sta2x11_regmap_lock, |
| 269 | .unlock = sta2x11_regmap_unlock, |
| 270 | .max_register = TEST_CTL_REG, |
| 271 | .readable_reg = sta2x11_apb_soc_regs_readable_reg, |
| 272 | .writeable_reg = sta2x11_apb_soc_regs_writeable_reg, |
| 273 | }; |
| 274 | |
| 275 | static struct regmap_config * |
| 276 | sta2x11_mfd_regmap_configs[sta2x11_n_mfd_plat_devs] = { |
| 277 | [sta2x11_sctl] = &sta2x11_sctl_regmap_config, |
| 278 | [sta2x11_apbreg] = &sta2x11_apbreg_regmap_config, |
| 279 | [sta2x11_apb_soc_regs] = &sta2x11_apb_soc_regs_regmap_config, |
| 280 | }; |
| 281 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 282 | /* Probe for the three platform devices */ |
| 283 | |
| 284 | static int sta2x11_mfd_platform_probe(struct platform_device *dev, |
| 285 | enum sta2x11_mfd_plat_dev index) |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 286 | { |
| 287 | struct pci_dev **pdev; |
| 288 | struct sta2x11_mfd *mfd; |
| 289 | struct resource *res; |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 290 | const char *name = sta2x11_mfd_names[index]; |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 291 | struct regmap_config *regmap_config = sta2x11_mfd_regmap_configs[index]; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 292 | |
| 293 | pdev = dev->dev.platform_data; |
| 294 | mfd = sta2x11_mfd_find(*pdev); |
| 295 | if (!mfd) |
| 296 | return -ENODEV; |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 297 | if (!regmap_config) |
| 298 | return -ENODEV; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 299 | |
| 300 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 301 | if (!res) |
| 302 | return -ENOMEM; |
| 303 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 304 | if (!request_mem_region(res->start, resource_size(res), name)) |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 305 | return -EBUSY; |
| 306 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 307 | mfd->regs[index] = ioremap(res->start, resource_size(res)); |
| 308 | if (!mfd->regs[index]) { |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 309 | release_mem_region(res->start, resource_size(res)); |
| 310 | return -ENOMEM; |
| 311 | } |
Davide Ciminaghi | d94e255 | 2012-11-09 15:19:53 +0100 | [diff] [blame] | 312 | regmap_config->lock_arg = &mfd->lock; |
| 313 | /* |
| 314 | No caching, registers could be reached both via regmap and via |
| 315 | void __iomem * |
| 316 | */ |
| 317 | regmap_config->cache_type = REGCACHE_NONE; |
| 318 | mfd->regmap[index] = devm_regmap_init_mmio(&dev->dev, mfd->regs[index], |
| 319 | regmap_config); |
| 320 | WARN_ON(!mfd->regmap[index]); |
| 321 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 322 | return 0; |
| 323 | } |
| 324 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 325 | static int sta2x11_sctl_probe(struct platform_device *dev) |
| 326 | { |
| 327 | return sta2x11_mfd_platform_probe(dev, sta2x11_sctl); |
| 328 | } |
| 329 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 330 | static int sta2x11_apbreg_probe(struct platform_device *dev) |
| 331 | { |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 332 | return sta2x11_mfd_platform_probe(dev, sta2x11_apbreg); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 333 | } |
| 334 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 335 | static int sta2x11_apb_soc_regs_probe(struct platform_device *dev) |
| 336 | { |
| 337 | return sta2x11_mfd_platform_probe(dev, sta2x11_apb_soc_regs); |
| 338 | } |
| 339 | |
| 340 | /* The three platform drivers */ |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 341 | static struct platform_driver sta2x11_sctl_platform_driver = { |
| 342 | .driver = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 343 | .name = STA2X11_MFD_SCTL_NAME, |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 344 | .owner = THIS_MODULE, |
| 345 | }, |
| 346 | .probe = sta2x11_sctl_probe, |
| 347 | }; |
| 348 | |
| 349 | static int __init sta2x11_sctl_init(void) |
| 350 | { |
| 351 | pr_info("%s\n", __func__); |
| 352 | return platform_driver_register(&sta2x11_sctl_platform_driver); |
| 353 | } |
| 354 | |
| 355 | static struct platform_driver sta2x11_platform_driver = { |
| 356 | .driver = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 357 | .name = STA2X11_MFD_APBREG_NAME, |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 358 | .owner = THIS_MODULE, |
| 359 | }, |
| 360 | .probe = sta2x11_apbreg_probe, |
| 361 | }; |
| 362 | |
| 363 | static int __init sta2x11_apbreg_init(void) |
| 364 | { |
| 365 | pr_info("%s\n", __func__); |
| 366 | return platform_driver_register(&sta2x11_platform_driver); |
| 367 | } |
| 368 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 369 | static struct platform_driver sta2x11_apb_soc_regs_platform_driver = { |
| 370 | .driver = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 371 | .name = STA2X11_MFD_APB_SOC_REGS_NAME, |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 372 | .owner = THIS_MODULE, |
| 373 | }, |
| 374 | .probe = sta2x11_apb_soc_regs_probe, |
| 375 | }; |
| 376 | |
| 377 | static int __init sta2x11_apb_soc_regs_init(void) |
| 378 | { |
| 379 | pr_info("%s\n", __func__); |
| 380 | return platform_driver_register(&sta2x11_apb_soc_regs_platform_driver); |
| 381 | } |
| 382 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 383 | /* |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 384 | * What follows are the PCI devices that host the above pdevs. |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 385 | * Each logic block is 4kB and they are all consecutive: we use this info. |
| 386 | */ |
| 387 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 388 | /* Mfd 0 device */ |
| 389 | |
| 390 | /* Mfd 0, Bar 0 */ |
| 391 | enum mfd0_bar0_cells { |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 392 | STA2X11_GPIO_0 = 0, |
| 393 | STA2X11_GPIO_1, |
| 394 | STA2X11_GPIO_2, |
| 395 | STA2X11_GPIO_3, |
| 396 | STA2X11_SCTL, |
| 397 | STA2X11_SCR, |
| 398 | STA2X11_TIME, |
| 399 | }; |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 400 | /* Mfd 0 , Bar 1 */ |
| 401 | enum mfd0_bar1_cells { |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 402 | STA2X11_APBREG = 0, |
| 403 | }; |
| 404 | #define CELL_4K(_name, _cell) { \ |
| 405 | .name = _name, \ |
| 406 | .start = _cell * 4096, .end = _cell * 4096 + 4095, \ |
| 407 | .flags = IORESOURCE_MEM, \ |
| 408 | } |
| 409 | |
| 410 | static const __devinitconst struct resource gpio_resources[] = { |
| 411 | { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 412 | /* 4 consecutive cells, 1 driver */ |
| 413 | .name = STA2X11_MFD_GPIO_NAME, |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 414 | .start = 0, |
| 415 | .end = (4 * 4096) - 1, |
| 416 | .flags = IORESOURCE_MEM, |
| 417 | } |
| 418 | }; |
| 419 | static const __devinitconst struct resource sctl_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 420 | CELL_4K(STA2X11_MFD_SCTL_NAME, STA2X11_SCTL), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 421 | }; |
| 422 | static const __devinitconst struct resource scr_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 423 | CELL_4K(STA2X11_MFD_SCR_NAME, STA2X11_SCR), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 424 | }; |
| 425 | static const __devinitconst struct resource time_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 426 | CELL_4K(STA2X11_MFD_TIME_NAME, STA2X11_TIME), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 427 | }; |
| 428 | |
| 429 | static const __devinitconst struct resource apbreg_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 430 | CELL_4K(STA2X11_MFD_APBREG_NAME, STA2X11_APBREG), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 431 | }; |
| 432 | |
| 433 | #define DEV(_name, _r) \ |
| 434 | { .name = _name, .num_resources = ARRAY_SIZE(_r), .resources = _r, } |
| 435 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 436 | static __devinitdata struct mfd_cell sta2x11_mfd0_bar0[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 437 | /* offset 0: we add pdata later */ |
| 438 | DEV(STA2X11_MFD_GPIO_NAME, gpio_resources), |
| 439 | DEV(STA2X11_MFD_SCTL_NAME, sctl_resources), |
| 440 | DEV(STA2X11_MFD_SCR_NAME, scr_resources), |
| 441 | DEV(STA2X11_MFD_TIME_NAME, time_resources), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 442 | }; |
| 443 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 444 | static __devinitdata struct mfd_cell sta2x11_mfd0_bar1[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 445 | DEV(STA2X11_MFD_APBREG_NAME, apbreg_resources), |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 446 | }; |
| 447 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 448 | /* Mfd 1 devices */ |
| 449 | |
| 450 | /* Mfd 1, Bar 0 */ |
| 451 | enum mfd1_bar0_cells { |
| 452 | STA2X11_VIC = 0, |
| 453 | }; |
| 454 | |
| 455 | /* Mfd 1, Bar 1 */ |
| 456 | enum mfd1_bar1_cells { |
| 457 | STA2X11_APB_SOC_REGS = 0, |
| 458 | }; |
| 459 | |
| 460 | static const __devinitconst struct resource vic_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 461 | CELL_4K(STA2X11_MFD_VIC_NAME, STA2X11_VIC), |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 462 | }; |
| 463 | |
| 464 | static const __devinitconst struct resource apb_soc_regs_resources[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 465 | CELL_4K(STA2X11_MFD_APB_SOC_REGS_NAME, STA2X11_APB_SOC_REGS), |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 466 | }; |
| 467 | |
| 468 | static __devinitdata struct mfd_cell sta2x11_mfd1_bar0[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 469 | DEV(STA2X11_MFD_VIC_NAME, vic_resources), |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 470 | }; |
| 471 | |
| 472 | static __devinitdata struct mfd_cell sta2x11_mfd1_bar1[] = { |
Davide Ciminaghi | b18adaf | 2012-11-09 15:19:55 +0100 | [diff] [blame^] | 473 | DEV(STA2X11_MFD_APB_SOC_REGS_NAME, apb_soc_regs_resources), |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 474 | }; |
| 475 | |
| 476 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 477 | static int sta2x11_mfd_suspend(struct pci_dev *pdev, pm_message_t state) |
| 478 | { |
| 479 | pci_save_state(pdev); |
| 480 | pci_disable_device(pdev); |
| 481 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 482 | |
| 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | static int sta2x11_mfd_resume(struct pci_dev *pdev) |
| 487 | { |
| 488 | int err; |
| 489 | |
| 490 | pci_set_power_state(pdev, 0); |
| 491 | err = pci_enable_device(pdev); |
| 492 | if (err) |
| 493 | return err; |
| 494 | pci_restore_state(pdev); |
| 495 | |
| 496 | return 0; |
| 497 | } |
| 498 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 499 | struct sta2x11_mfd_bar_setup_data { |
| 500 | struct mfd_cell *cells; |
| 501 | int ncells; |
| 502 | }; |
| 503 | |
| 504 | struct sta2x11_mfd_setup_data { |
| 505 | struct sta2x11_mfd_bar_setup_data bars[2]; |
| 506 | }; |
| 507 | |
| 508 | #define STA2X11_MFD0 0 |
| 509 | #define STA2X11_MFD1 1 |
| 510 | |
| 511 | static struct sta2x11_mfd_setup_data mfd_setup_data[] = { |
| 512 | /* Mfd 0: gpio, sctl, scr, timers / apbregs */ |
| 513 | [STA2X11_MFD0] = { |
| 514 | .bars = { |
| 515 | [0] = { |
| 516 | .cells = sta2x11_mfd0_bar0, |
| 517 | .ncells = ARRAY_SIZE(sta2x11_mfd0_bar0), |
| 518 | }, |
| 519 | [1] = { |
| 520 | .cells = sta2x11_mfd0_bar1, |
| 521 | .ncells = ARRAY_SIZE(sta2x11_mfd0_bar1), |
| 522 | }, |
| 523 | }, |
| 524 | }, |
| 525 | /* Mfd 1: vic / apb-soc-regs */ |
| 526 | [STA2X11_MFD1] = { |
| 527 | .bars = { |
| 528 | [0] = { |
| 529 | .cells = sta2x11_mfd1_bar0, |
| 530 | .ncells = ARRAY_SIZE(sta2x11_mfd1_bar0), |
| 531 | }, |
| 532 | [1] = { |
| 533 | .cells = sta2x11_mfd1_bar1, |
| 534 | .ncells = ARRAY_SIZE(sta2x11_mfd1_bar1), |
| 535 | }, |
| 536 | }, |
| 537 | }, |
| 538 | }; |
| 539 | |
| 540 | static void __devinit sta2x11_mfd_setup(struct pci_dev *pdev, |
| 541 | struct sta2x11_mfd_setup_data *sd) |
| 542 | { |
| 543 | int i, j; |
| 544 | for (i = 0; i < ARRAY_SIZE(sd->bars); i++) |
| 545 | for (j = 0; j < sd->bars[i].ncells; j++) { |
| 546 | sd->bars[i].cells[j].pdata_size = sizeof(pdev); |
| 547 | sd->bars[i].cells[j].platform_data = &pdev; |
| 548 | } |
| 549 | } |
| 550 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 551 | static int __devinit sta2x11_mfd_probe(struct pci_dev *pdev, |
| 552 | const struct pci_device_id *pci_id) |
| 553 | { |
| 554 | int err, i; |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 555 | struct sta2x11_mfd_setup_data *setup_data; |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 556 | struct sta2x11_gpio_pdata *gpio_data; |
| 557 | |
| 558 | dev_info(&pdev->dev, "%s\n", __func__); |
| 559 | |
| 560 | err = pci_enable_device(pdev); |
| 561 | if (err) { |
| 562 | dev_err(&pdev->dev, "Can't enable device.\n"); |
| 563 | return err; |
| 564 | } |
| 565 | |
| 566 | err = pci_enable_msi(pdev); |
| 567 | if (err) |
| 568 | dev_info(&pdev->dev, "Enable msi failed\n"); |
| 569 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 570 | setup_data = pci_id->device == PCI_DEVICE_ID_STMICRO_GPIO ? |
| 571 | &mfd_setup_data[STA2X11_MFD0] : |
| 572 | &mfd_setup_data[STA2X11_MFD1]; |
| 573 | |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 574 | /* Read gpio config data as pci device's platform data */ |
| 575 | gpio_data = dev_get_platdata(&pdev->dev); |
| 576 | if (!gpio_data) |
| 577 | dev_warn(&pdev->dev, "no gpio configuration\n"); |
| 578 | |
| 579 | dev_dbg(&pdev->dev, "%s, gpio_data = %p (%p)\n", __func__, |
| 580 | gpio_data, &gpio_data); |
| 581 | dev_dbg(&pdev->dev, "%s, pdev = %p (%p)\n", __func__, |
| 582 | pdev, &pdev); |
| 583 | |
| 584 | /* platform data is the pci device for all of them */ |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 585 | sta2x11_mfd_setup(pdev, setup_data); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 586 | |
| 587 | /* Record this pdev before mfd_add_devices: their probe looks for it */ |
| 588 | sta2x11_mfd_add(pdev, GFP_ATOMIC); |
| 589 | |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 590 | /* Just 2 bars for all mfd's at present */ |
| 591 | for (i = 0; i < 2; i++) { |
| 592 | err = mfd_add_devices(&pdev->dev, -1, |
| 593 | setup_data->bars[i].cells, |
| 594 | setup_data->bars[i].ncells, |
| 595 | &pdev->resource[i], |
| 596 | 0, NULL); |
| 597 | if (err) { |
| 598 | dev_err(&pdev->dev, |
| 599 | "mfd_add_devices[%d] failed: %d\n", i, err); |
| 600 | goto err_disable; |
| 601 | } |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 602 | } |
| 603 | |
| 604 | return 0; |
| 605 | |
| 606 | err_disable: |
| 607 | mfd_remove_devices(&pdev->dev); |
| 608 | pci_disable_device(pdev); |
| 609 | pci_disable_msi(pdev); |
| 610 | return err; |
| 611 | } |
| 612 | |
| 613 | static DEFINE_PCI_DEVICE_TABLE(sta2x11_mfd_tbl) = { |
| 614 | {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_GPIO)}, |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 615 | {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIC)}, |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 616 | {0,}, |
| 617 | }; |
| 618 | |
| 619 | static struct pci_driver sta2x11_mfd_driver = { |
| 620 | .name = "sta2x11-mfd", |
| 621 | .id_table = sta2x11_mfd_tbl, |
| 622 | .probe = sta2x11_mfd_probe, |
| 623 | .suspend = sta2x11_mfd_suspend, |
| 624 | .resume = sta2x11_mfd_resume, |
| 625 | }; |
| 626 | |
| 627 | static int __init sta2x11_mfd_init(void) |
| 628 | { |
| 629 | pr_info("%s\n", __func__); |
| 630 | return pci_register_driver(&sta2x11_mfd_driver); |
| 631 | } |
| 632 | |
| 633 | /* |
| 634 | * All of this must be ready before "normal" devices like MMCI appear. |
| 635 | * But MFD (the pci device) can't be too early. The following choice |
| 636 | * prepares platform drivers very early and probe the PCI device later, |
| 637 | * but before other PCI devices. |
| 638 | */ |
| 639 | subsys_initcall(sta2x11_apbreg_init); |
| 640 | subsys_initcall(sta2x11_sctl_init); |
Davide Ciminaghi | 1950c71 | 2012-11-09 15:19:52 +0100 | [diff] [blame] | 641 | subsys_initcall(sta2x11_apb_soc_regs_init); |
Alessandro Rubini | 35bdd29 | 2012-04-12 10:48:44 +0200 | [diff] [blame] | 642 | rootfs_initcall(sta2x11_mfd_init); |
| 643 | |
| 644 | MODULE_LICENSE("GPL v2"); |
| 645 | MODULE_AUTHOR("Wind River"); |
| 646 | MODULE_DESCRIPTION("STA2x11 mfd for GPIO, SCTL and APBREG"); |
| 647 | MODULE_DEVICE_TABLE(pci, sta2x11_mfd_tbl); |