Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1 | /* |
| 2 | * User-space DMA and UIO based Redrapids Pocket Change CardBus driver |
| 3 | * |
| 4 | * Copyright 2008 Vijay Kumar <vijaykumar@bravegnu.org> |
| 5 | * |
| 6 | * Licensed under GPL version 2 only. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/device.h> |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/uio_driver.h> |
| 13 | #include <linux/spinlock.h> |
| 14 | #include <linux/cdev.h> |
| 15 | #include <linux/delay.h> |
| 16 | #include <linux/sysfs.h> |
| 17 | #include <linux/poll.h> |
| 18 | #include <linux/idr.h> |
| 19 | #include <linux/interrupt.h> |
| 20 | #include <linux/init.h> |
| 21 | #include <linux/ioctl.h> |
| 22 | #include <linux/io.h> |
Greg Kroah-Hartman | 8037cda | 2009-10-12 14:59:56 -0700 | [diff] [blame] | 23 | #include <linux/sched.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 24 | #include <linux/slab.h> |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 25 | |
| 26 | #include "poch.h" |
| 27 | |
| 28 | #include <asm/cacheflush.h> |
| 29 | |
| 30 | #ifndef PCI_VENDOR_ID_RRAPIDS |
| 31 | #define PCI_VENDOR_ID_RRAPIDS 0x17D2 |
| 32 | #endif |
| 33 | |
| 34 | #ifndef PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE |
| 35 | #define PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE 0x0351 |
| 36 | #endif |
| 37 | |
| 38 | #define POCH_NCHANNELS 2 |
| 39 | |
| 40 | #define MAX_POCH_CARDS 8 |
| 41 | #define MAX_POCH_DEVICES (MAX_POCH_CARDS * POCH_NCHANNELS) |
| 42 | |
| 43 | #define DRV_NAME "poch" |
| 44 | #define PFX DRV_NAME ": " |
| 45 | |
| 46 | /* |
| 47 | * BAR0 Bridge Register Definitions |
| 48 | */ |
| 49 | |
| 50 | #define BRIDGE_REV_REG 0x0 |
| 51 | #define BRIDGE_INT_MASK_REG 0x4 |
| 52 | #define BRIDGE_INT_STAT_REG 0x8 |
| 53 | |
| 54 | #define BRIDGE_INT_ACTIVE (0x1 << 31) |
| 55 | #define BRIDGE_INT_FPGA (0x1 << 2) |
| 56 | #define BRIDGE_INT_TEMP_FAIL (0x1 << 1) |
| 57 | #define BRIDGE_INT_TEMP_WARN (0x1 << 0) |
| 58 | |
| 59 | #define BRIDGE_FPGA_RESET_REG 0xC |
| 60 | |
| 61 | #define BRIDGE_CARD_POWER_REG 0x10 |
| 62 | #define BRIDGE_CARD_POWER_EN (0x1 << 0) |
| 63 | #define BRIDGE_CARD_POWER_PROG_DONE (0x1 << 31) |
| 64 | |
| 65 | #define BRIDGE_JTAG_REG 0x14 |
| 66 | #define BRIDGE_DMA_GO_REG 0x18 |
| 67 | #define BRIDGE_STAT_0_REG 0x1C |
| 68 | #define BRIDGE_STAT_1_REG 0x20 |
| 69 | #define BRIDGE_STAT_2_REG 0x24 |
| 70 | #define BRIDGE_STAT_3_REG 0x28 |
| 71 | #define BRIDGE_TEMP_STAT_REG 0x2C |
| 72 | #define BRIDGE_TEMP_THRESH_REG 0x30 |
| 73 | #define BRIDGE_EEPROM_REVSEL_REG 0x34 |
| 74 | #define BRIDGE_CIS_STRUCT_REG 0x100 |
| 75 | #define BRIDGE_BOARDREV_REG 0x124 |
| 76 | |
| 77 | /* |
| 78 | * BAR1 FPGA Register Definitions |
| 79 | */ |
| 80 | |
| 81 | #define FPGA_IFACE_REV_REG 0x0 |
| 82 | #define FPGA_RX_BLOCK_SIZE_REG 0x8 |
| 83 | #define FPGA_TX_BLOCK_SIZE_REG 0xC |
| 84 | #define FPGA_RX_BLOCK_COUNT_REG 0x10 |
| 85 | #define FPGA_TX_BLOCK_COUNT_REG 0x14 |
| 86 | #define FPGA_RX_CURR_DMA_BLOCK_REG 0x18 |
| 87 | #define FPGA_TX_CURR_DMA_BLOCK_REG 0x1C |
| 88 | #define FPGA_RX_GROUP_COUNT_REG 0x20 |
| 89 | #define FPGA_TX_GROUP_COUNT_REG 0x24 |
| 90 | #define FPGA_RX_CURR_GROUP_REG 0x28 |
| 91 | #define FPGA_TX_CURR_GROUP_REG 0x2C |
| 92 | #define FPGA_RX_CURR_PCI_REG 0x38 |
| 93 | #define FPGA_TX_CURR_PCI_REG 0x3C |
| 94 | #define FPGA_RX_GROUP0_START_REG 0x40 |
| 95 | #define FPGA_TX_GROUP0_START_REG 0xC0 |
| 96 | #define FPGA_DMA_DESC_1_REG 0x140 |
| 97 | #define FPGA_DMA_DESC_2_REG 0x144 |
| 98 | #define FPGA_DMA_DESC_3_REG 0x148 |
| 99 | #define FPGA_DMA_DESC_4_REG 0x14C |
| 100 | |
| 101 | #define FPGA_DMA_INT_STAT_REG 0x150 |
| 102 | #define FPGA_DMA_INT_MASK_REG 0x154 |
| 103 | #define FPGA_DMA_INT_RX (1 << 0) |
| 104 | #define FPGA_DMA_INT_TX (1 << 1) |
| 105 | |
| 106 | #define FPGA_RX_GROUPS_PER_INT_REG 0x158 |
| 107 | #define FPGA_TX_GROUPS_PER_INT_REG 0x15C |
| 108 | #define FPGA_DMA_ADR_PAGE_REG 0x160 |
| 109 | #define FPGA_FPGA_REV_REG 0x200 |
| 110 | |
| 111 | #define FPGA_ADC_CLOCK_CTL_REG 0x204 |
| 112 | #define FPGA_ADC_CLOCK_CTL_OSC_EN (0x1 << 3) |
| 113 | #define FPGA_ADC_CLOCK_LOCAL_CLK (0x1 | FPGA_ADC_CLOCK_CTL_OSC_EN) |
| 114 | #define FPGA_ADC_CLOCK_EXT_SAMP_CLK 0X0 |
| 115 | |
| 116 | #define FPGA_ADC_DAC_EN_REG 0x208 |
| 117 | #define FPGA_ADC_DAC_EN_DAC_OFF (0x1 << 1) |
| 118 | #define FPGA_ADC_DAC_EN_ADC_OFF (0x1 << 0) |
| 119 | |
| 120 | #define FPGA_INT_STAT_REG 0x20C |
| 121 | #define FPGA_INT_MASK_REG 0x210 |
| 122 | #define FPGA_INT_PLL_UNLOCKED (0x1 << 9) |
| 123 | #define FPGA_INT_DMA_CORE (0x1 << 8) |
| 124 | #define FPGA_INT_TX_FF_EMPTY (0x1 << 7) |
| 125 | #define FPGA_INT_RX_FF_EMPTY (0x1 << 6) |
| 126 | #define FPGA_INT_TX_FF_OVRFLW (0x1 << 3) |
| 127 | #define FPGA_INT_RX_FF_OVRFLW (0x1 << 2) |
| 128 | #define FPGA_INT_TX_ACQ_DONE (0x1 << 1) |
| 129 | #define FPGA_INT_RX_ACQ_DONE (0x1) |
| 130 | |
Vijay Kumar | ca21999 | 2008-10-29 08:58:37 +0530 | [diff] [blame] | 131 | #define FPGA_RX_CTL_REG 0x214 |
| 132 | #define FPGA_RX_CTL_FIFO_FLUSH (0x1 << 9) |
| 133 | #define FPGA_RX_CTL_SYNTH_DATA (0x1 << 8) |
| 134 | #define FPGA_RX_CTL_CONT_CAP (0x0 << 1) |
| 135 | #define FPGA_RX_CTL_SNAP_CAP (0x1 << 1) |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 136 | |
| 137 | #define FPGA_RX_ARM_REG 0x21C |
| 138 | |
| 139 | #define FPGA_DOM_REG 0x224 |
| 140 | #define FPGA_DOM_DCM_RESET (0x1 << 5) |
| 141 | #define FPGA_DOM_SOFT_RESET (0x1 << 4) |
| 142 | #define FPGA_DOM_DUAL_M_SG_DMA (0x0) |
| 143 | #define FPGA_DOM_TARGET_ACCESS (0x1) |
| 144 | |
| 145 | #define FPGA_TX_CTL_REG 0x228 |
| 146 | #define FPGA_TX_CTL_FIFO_FLUSH (0x1 << 9) |
| 147 | #define FPGA_TX_CTL_OUTPUT_ZERO (0x0 << 2) |
| 148 | #define FPGA_TX_CTL_OUTPUT_CARDBUS (0x1 << 2) |
| 149 | #define FPGA_TX_CTL_OUTPUT_ADC (0x2 << 2) |
| 150 | #define FPGA_TX_CTL_OUTPUT_SNAPSHOT (0x3 << 2) |
| 151 | #define FPGA_TX_CTL_LOOPBACK (0x1 << 0) |
| 152 | |
| 153 | #define FPGA_ENDIAN_MODE_REG 0x22C |
| 154 | #define FPGA_RX_FIFO_COUNT_REG 0x28C |
| 155 | #define FPGA_TX_ENABLE_REG 0x298 |
| 156 | #define FPGA_TX_TRIGGER_REG 0x29C |
| 157 | #define FPGA_TX_DATAMEM_COUNT_REG 0x2A8 |
| 158 | #define FPGA_CAP_FIFO_REG 0x300 |
| 159 | #define FPGA_TX_SNAPSHOT_REG 0x8000 |
| 160 | |
| 161 | /* |
| 162 | * Channel Index Definitions |
| 163 | */ |
| 164 | |
| 165 | enum { |
| 166 | CHNO_RX_CHANNEL, |
| 167 | CHNO_TX_CHANNEL, |
| 168 | }; |
| 169 | |
| 170 | struct poch_dev; |
| 171 | |
| 172 | enum channel_dir { |
| 173 | CHANNEL_DIR_RX, |
| 174 | CHANNEL_DIR_TX, |
| 175 | }; |
| 176 | |
| 177 | struct poch_group_info { |
| 178 | struct page *pg; |
| 179 | dma_addr_t dma_addr; |
| 180 | unsigned long user_offset; |
| 181 | }; |
| 182 | |
| 183 | struct channel_info { |
| 184 | unsigned int chno; |
| 185 | |
| 186 | atomic_t sys_block_size; |
| 187 | atomic_t sys_group_size; |
| 188 | atomic_t sys_group_count; |
| 189 | |
| 190 | enum channel_dir dir; |
| 191 | |
| 192 | unsigned long block_size; |
| 193 | unsigned long group_size; |
| 194 | unsigned long group_count; |
| 195 | |
| 196 | /* Contains the DMA address and VM offset of each group. */ |
| 197 | struct poch_group_info *groups; |
| 198 | |
| 199 | /* Contains the header and circular buffer exported to userspace. */ |
| 200 | spinlock_t group_offsets_lock; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 201 | |
Vijay Kumar B | b01faf0 | 2009-09-21 11:23:55 +0530 | [diff] [blame] | 202 | /* Last group consumed by user space. */ |
| 203 | unsigned int consumed; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 204 | /* Last group indicated as 'complete' to user space. */ |
| 205 | unsigned int transfer; |
| 206 | |
| 207 | wait_queue_head_t wq; |
| 208 | |
| 209 | union { |
| 210 | unsigned int data_available; |
| 211 | unsigned int space_available; |
| 212 | }; |
| 213 | |
| 214 | void __iomem *bridge_iomem; |
| 215 | void __iomem *fpga_iomem; |
| 216 | spinlock_t *iomem_lock; |
| 217 | |
| 218 | atomic_t free; |
| 219 | atomic_t inited; |
| 220 | |
| 221 | /* Error counters */ |
| 222 | struct poch_counters counters; |
| 223 | spinlock_t counters_lock; |
| 224 | |
| 225 | struct device *dev; |
| 226 | }; |
| 227 | |
| 228 | struct poch_dev { |
| 229 | struct uio_info uio; |
| 230 | struct pci_dev *pci_dev; |
| 231 | unsigned int nchannels; |
| 232 | struct channel_info channels[POCH_NCHANNELS]; |
| 233 | struct cdev cdev; |
| 234 | |
| 235 | /* Counts the no. of channels that have been opened. On first |
| 236 | * open, the card is powered on. On last channel close, the |
| 237 | * card is powered off. |
| 238 | */ |
| 239 | atomic_t usage; |
| 240 | |
| 241 | void __iomem *bridge_iomem; |
| 242 | void __iomem *fpga_iomem; |
| 243 | spinlock_t iomem_lock; |
| 244 | |
| 245 | struct device *dev; |
| 246 | }; |
| 247 | |
Vijay Kumar B | 16fbf4c | 2009-09-21 11:23:54 +0530 | [diff] [blame] | 248 | static int synth_rx; |
| 249 | module_param(synth_rx, bool, 0600); |
| 250 | MODULE_PARM_DESC(synth_rx, |
| 251 | "Synthesize received values using a counter. Default: No"); |
| 252 | |
Vijay Kumar | dad1740 | 2009-09-21 11:23:57 +0530 | [diff] [blame] | 253 | static int loopback; |
| 254 | module_param(loopback, bool, 0600); |
| 255 | MODULE_PARM_DESC(loopback, |
| 256 | "Enable hardware loopback of trasnmitted data. Default: No"); |
| 257 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 258 | static dev_t poch_first_dev; |
| 259 | static struct class *poch_cls; |
| 260 | static DEFINE_IDR(poch_ids); |
| 261 | |
| 262 | static ssize_t store_block_size(struct device *dev, |
| 263 | struct device_attribute *attr, |
| 264 | const char *buf, size_t count) |
| 265 | { |
| 266 | struct channel_info *channel = dev_get_drvdata(dev); |
| 267 | unsigned long block_size; |
| 268 | |
| 269 | sscanf(buf, "%lu", &block_size); |
| 270 | atomic_set(&channel->sys_block_size, block_size); |
| 271 | |
| 272 | return count; |
| 273 | } |
| 274 | static DEVICE_ATTR(block_size, S_IWUSR|S_IWGRP, NULL, store_block_size); |
| 275 | |
| 276 | static ssize_t store_group_size(struct device *dev, |
| 277 | struct device_attribute *attr, |
| 278 | const char *buf, size_t count) |
| 279 | { |
| 280 | struct channel_info *channel = dev_get_drvdata(dev); |
| 281 | unsigned long group_size; |
| 282 | |
| 283 | sscanf(buf, "%lu", &group_size); |
| 284 | atomic_set(&channel->sys_group_size, group_size); |
| 285 | |
| 286 | return count; |
| 287 | } |
| 288 | static DEVICE_ATTR(group_size, S_IWUSR|S_IWGRP, NULL, store_group_size); |
| 289 | |
| 290 | static ssize_t store_group_count(struct device *dev, |
| 291 | struct device_attribute *attr, |
| 292 | const char *buf, size_t count) |
| 293 | { |
| 294 | struct channel_info *channel = dev_get_drvdata(dev); |
| 295 | unsigned long group_count; |
| 296 | |
| 297 | sscanf(buf, "%lu", &group_count); |
| 298 | atomic_set(&channel->sys_group_count, group_count); |
| 299 | |
| 300 | return count; |
| 301 | } |
| 302 | static DEVICE_ATTR(group_count, S_IWUSR|S_IWGRP, NULL, store_group_count); |
| 303 | |
| 304 | static ssize_t show_direction(struct device *dev, |
| 305 | struct device_attribute *attr, char *buf) |
| 306 | { |
| 307 | struct channel_info *channel = dev_get_drvdata(dev); |
| 308 | int len; |
| 309 | |
| 310 | len = sprintf(buf, "%s\n", (channel->dir ? "tx" : "rx")); |
| 311 | return len; |
| 312 | } |
| 313 | static DEVICE_ATTR(dir, S_IRUSR|S_IRGRP, show_direction, NULL); |
| 314 | |
Vijay Kumar | ea0a337 | 2008-10-29 08:58:34 +0530 | [diff] [blame] | 315 | static unsigned long npages(unsigned long bytes) |
| 316 | { |
| 317 | if (bytes % PAGE_SIZE == 0) |
| 318 | return bytes / PAGE_SIZE; |
| 319 | else |
| 320 | return (bytes / PAGE_SIZE) + 1; |
| 321 | } |
| 322 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 323 | static ssize_t show_mmap_size(struct device *dev, |
| 324 | struct device_attribute *attr, char *buf) |
| 325 | { |
| 326 | struct channel_info *channel = dev_get_drvdata(dev); |
| 327 | int len; |
| 328 | unsigned long mmap_size; |
| 329 | unsigned long group_pages; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 330 | unsigned long total_group_pages; |
| 331 | |
Vijay Kumar | ea0a337 | 2008-10-29 08:58:34 +0530 | [diff] [blame] | 332 | group_pages = npages(channel->group_size); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 333 | total_group_pages = group_pages * channel->group_count; |
| 334 | |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 335 | mmap_size = total_group_pages * PAGE_SIZE; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 336 | len = sprintf(buf, "%lu\n", mmap_size); |
| 337 | return len; |
| 338 | } |
| 339 | static DEVICE_ATTR(mmap_size, S_IRUSR|S_IRGRP, show_mmap_size, NULL); |
| 340 | |
| 341 | static struct device_attribute *poch_class_attrs[] = { |
| 342 | &dev_attr_block_size, |
| 343 | &dev_attr_group_size, |
| 344 | &dev_attr_group_count, |
| 345 | &dev_attr_dir, |
| 346 | &dev_attr_mmap_size, |
| 347 | }; |
| 348 | |
| 349 | static void poch_channel_free_groups(struct channel_info *channel) |
| 350 | { |
| 351 | unsigned long i; |
| 352 | |
| 353 | for (i = 0; i < channel->group_count; i++) { |
| 354 | struct poch_group_info *group; |
| 355 | unsigned int order; |
| 356 | |
| 357 | group = &channel->groups[i]; |
| 358 | order = get_order(channel->group_size); |
| 359 | if (group->pg) |
| 360 | __free_pages(group->pg, order); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | static int poch_channel_alloc_groups(struct channel_info *channel) |
| 365 | { |
| 366 | unsigned long i; |
| 367 | unsigned long group_pages; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 368 | |
Vijay Kumar | ea0a337 | 2008-10-29 08:58:34 +0530 | [diff] [blame] | 369 | group_pages = npages(channel->group_size); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 370 | |
| 371 | for (i = 0; i < channel->group_count; i++) { |
| 372 | struct poch_group_info *group; |
| 373 | unsigned int order; |
| 374 | gfp_t gfp_mask; |
| 375 | |
| 376 | group = &channel->groups[i]; |
| 377 | order = get_order(channel->group_size); |
| 378 | |
| 379 | /* |
| 380 | * __GFP_COMP is required here since we are going to |
| 381 | * perform non-linear mapping to userspace. For more |
| 382 | * information read the vm_insert_page() function |
| 383 | * comments. |
| 384 | */ |
| 385 | |
| 386 | gfp_mask = GFP_KERNEL | GFP_DMA32 | __GFP_ZERO; |
| 387 | group->pg = alloc_pages(gfp_mask, order); |
| 388 | if (!group->pg) { |
| 389 | poch_channel_free_groups(channel); |
| 390 | return -ENOMEM; |
| 391 | } |
| 392 | |
| 393 | /* FIXME: This is the physical address not the bus |
| 394 | * address! This won't work in architectures that |
| 395 | * have an IOMMU. Can we use pci_map_single() for |
| 396 | * this? |
| 397 | */ |
| 398 | group->dma_addr = page_to_pfn(group->pg) * PAGE_SIZE; |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 399 | group->user_offset = (i * group_pages) * PAGE_SIZE; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 400 | |
Vijay Kumar | 3ca67c1 | 2008-10-29 08:58:36 +0530 | [diff] [blame] | 401 | printk(KERN_INFO PFX "%ld: user_offset: 0x%lx\n", i, |
| 402 | group->user_offset); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | |
Vijay Kumar | 7dadbbc | 2008-10-29 08:58:35 +0530 | [diff] [blame] | 408 | static int channel_latch_attr(struct channel_info *channel) |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 409 | { |
| 410 | channel->group_count = atomic_read(&channel->sys_group_count); |
| 411 | channel->group_size = atomic_read(&channel->sys_group_size); |
| 412 | channel->block_size = atomic_read(&channel->sys_block_size); |
Vijay Kumar | 7dadbbc | 2008-10-29 08:58:35 +0530 | [diff] [blame] | 413 | |
| 414 | if (channel->group_count == 0) { |
| 415 | printk(KERN_ERR PFX "invalid group count %lu", |
| 416 | channel->group_count); |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | |
| 420 | if (channel->group_size == 0 || |
| 421 | channel->group_size < channel->block_size) { |
| 422 | printk(KERN_ERR PFX "invalid group size %lu", |
| 423 | channel->group_size); |
| 424 | return -EINVAL; |
| 425 | } |
| 426 | |
| 427 | if (channel->block_size == 0 || (channel->block_size % 8) != 0) { |
| 428 | printk(KERN_ERR PFX "invalid block size %lu", |
| 429 | channel->block_size); |
| 430 | return -EINVAL; |
| 431 | } |
| 432 | |
| 433 | if (channel->group_size % channel->block_size != 0) { |
| 434 | printk(KERN_ERR PFX |
| 435 | "group size should be multiple of block size"); |
| 436 | return -EINVAL; |
| 437 | } |
| 438 | |
| 439 | return 0; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 440 | } |
| 441 | |
| 442 | /* |
| 443 | * Configure DMA group registers |
| 444 | */ |
| 445 | static void channel_dma_init(struct channel_info *channel) |
| 446 | { |
| 447 | void __iomem *fpga = channel->fpga_iomem; |
| 448 | u32 group_regs_base; |
| 449 | u32 group_reg; |
| 450 | unsigned int page; |
| 451 | unsigned int group_in_page; |
| 452 | unsigned long i; |
| 453 | u32 block_size_reg; |
| 454 | u32 block_count_reg; |
| 455 | u32 group_count_reg; |
| 456 | u32 groups_per_int_reg; |
| 457 | u32 curr_pci_reg; |
| 458 | |
| 459 | if (channel->chno == CHNO_RX_CHANNEL) { |
| 460 | group_regs_base = FPGA_RX_GROUP0_START_REG; |
| 461 | block_size_reg = FPGA_RX_BLOCK_SIZE_REG; |
| 462 | block_count_reg = FPGA_RX_BLOCK_COUNT_REG; |
| 463 | group_count_reg = FPGA_RX_GROUP_COUNT_REG; |
| 464 | groups_per_int_reg = FPGA_RX_GROUPS_PER_INT_REG; |
| 465 | curr_pci_reg = FPGA_RX_CURR_PCI_REG; |
| 466 | } else { |
| 467 | group_regs_base = FPGA_TX_GROUP0_START_REG; |
| 468 | block_size_reg = FPGA_TX_BLOCK_SIZE_REG; |
| 469 | block_count_reg = FPGA_TX_BLOCK_COUNT_REG; |
| 470 | group_count_reg = FPGA_TX_GROUP_COUNT_REG; |
| 471 | groups_per_int_reg = FPGA_TX_GROUPS_PER_INT_REG; |
| 472 | curr_pci_reg = FPGA_TX_CURR_PCI_REG; |
| 473 | } |
| 474 | |
| 475 | printk(KERN_WARNING "block_size, group_size, group_count\n"); |
Vijay Kumar | 95ead520 | 2008-10-29 08:58:32 +0530 | [diff] [blame] | 476 | /* |
| 477 | * Block size is represented in no. of 64 bit transfers. |
| 478 | */ |
| 479 | iowrite32(channel->block_size / 8, fpga + block_size_reg); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 480 | iowrite32(channel->group_size / channel->block_size, |
| 481 | fpga + block_count_reg); |
| 482 | iowrite32(channel->group_count, fpga + group_count_reg); |
| 483 | /* FIXME: Hardcoded groups per int. Get it from sysfs? */ |
Vijay Kumar B | 7e72a85 | 2009-09-21 11:23:56 +0530 | [diff] [blame] | 484 | iowrite32(16, fpga + groups_per_int_reg); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 485 | |
| 486 | /* Unlock PCI address? Not defined in the data sheet, but used |
| 487 | * in the reference code by Redrapids. |
| 488 | */ |
| 489 | iowrite32(0x1, fpga + curr_pci_reg); |
| 490 | |
| 491 | /* The DMA address page register is shared between the RX and |
| 492 | * TX channels, so acquire lock. |
| 493 | */ |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 494 | for (i = 0; i < channel->group_count; i++) { |
| 495 | page = i / 32; |
| 496 | group_in_page = i % 32; |
| 497 | |
| 498 | group_reg = group_regs_base + (group_in_page * 4); |
| 499 | |
Vijay Kumar | 1b8ee91 | 2008-10-29 08:58:40 +0530 | [diff] [blame] | 500 | spin_lock(channel->iomem_lock); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 501 | iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG); |
| 502 | iowrite32(channel->groups[i].dma_addr, fpga + group_reg); |
Vijay Kumar | 1b8ee91 | 2008-10-29 08:58:40 +0530 | [diff] [blame] | 503 | spin_unlock(channel->iomem_lock); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 504 | } |
Vijay Kumar | 1b8ee91 | 2008-10-29 08:58:40 +0530 | [diff] [blame] | 505 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 506 | for (i = 0; i < channel->group_count; i++) { |
| 507 | page = i / 32; |
| 508 | group_in_page = i % 32; |
| 509 | |
| 510 | group_reg = group_regs_base + (group_in_page * 4); |
| 511 | |
Vijay Kumar | 1b8ee91 | 2008-10-29 08:58:40 +0530 | [diff] [blame] | 512 | spin_lock(channel->iomem_lock); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 513 | iowrite32(page, fpga + FPGA_DMA_ADR_PAGE_REG); |
| 514 | printk(KERN_INFO PFX "%ld: read dma_addr: 0x%x\n", i, |
| 515 | ioread32(fpga + group_reg)); |
Vijay Kumar | 1b8ee91 | 2008-10-29 08:58:40 +0530 | [diff] [blame] | 516 | spin_unlock(channel->iomem_lock); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 517 | } |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 518 | |
| 519 | } |
| 520 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 521 | static void __poch_channel_clear_counters(struct channel_info *channel) |
| 522 | { |
| 523 | channel->counters.pll_unlock = 0; |
| 524 | channel->counters.fifo_empty = 0; |
| 525 | channel->counters.fifo_overflow = 0; |
| 526 | } |
| 527 | |
| 528 | static int poch_channel_init(struct channel_info *channel, |
| 529 | struct poch_dev *poch_dev) |
| 530 | { |
| 531 | struct pci_dev *pdev = poch_dev->pci_dev; |
| 532 | struct device *dev = &pdev->dev; |
| 533 | unsigned long alloc_size; |
| 534 | int ret; |
| 535 | |
| 536 | printk(KERN_WARNING "channel_latch_attr\n"); |
| 537 | |
Vijay Kumar | 7dadbbc | 2008-10-29 08:58:35 +0530 | [diff] [blame] | 538 | ret = channel_latch_attr(channel); |
| 539 | if (ret != 0) |
| 540 | goto out; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 541 | |
Vijay Kumar B | b01faf0 | 2009-09-21 11:23:55 +0530 | [diff] [blame] | 542 | channel->consumed = 0; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 543 | channel->transfer = 0; |
| 544 | |
| 545 | /* Allocate memory to hold group information. */ |
| 546 | alloc_size = channel->group_count * sizeof(struct poch_group_info); |
| 547 | channel->groups = kzalloc(alloc_size, GFP_KERNEL); |
| 548 | if (!channel->groups) { |
| 549 | dev_err(dev, "error allocating memory for group info\n"); |
| 550 | ret = -ENOMEM; |
| 551 | goto out; |
| 552 | } |
| 553 | |
| 554 | printk(KERN_WARNING "poch_channel_alloc_groups\n"); |
| 555 | |
| 556 | ret = poch_channel_alloc_groups(channel); |
| 557 | if (ret) { |
| 558 | dev_err(dev, "error allocating groups of order %d\n", |
| 559 | get_order(channel->group_size)); |
| 560 | goto out_free_group_info; |
| 561 | } |
| 562 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 563 | channel->fpga_iomem = poch_dev->fpga_iomem; |
| 564 | channel->bridge_iomem = poch_dev->bridge_iomem; |
| 565 | channel->iomem_lock = &poch_dev->iomem_lock; |
| 566 | spin_lock_init(&channel->counters_lock); |
| 567 | |
| 568 | __poch_channel_clear_counters(channel); |
| 569 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 570 | return 0; |
| 571 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 572 | out_free_group_info: |
| 573 | kfree(channel->groups); |
| 574 | out: |
| 575 | return ret; |
| 576 | } |
| 577 | |
| 578 | static int poch_wait_fpga_prog(void __iomem *bridge) |
| 579 | { |
| 580 | unsigned long total_wait; |
| 581 | const unsigned long wait_period = 100; |
| 582 | /* FIXME: Get the actual timeout */ |
| 583 | const unsigned long prog_timeo = 10000; /* 10 Seconds */ |
| 584 | u32 card_power; |
| 585 | |
| 586 | printk(KERN_WARNING "poch_wait_fpg_prog\n"); |
| 587 | |
| 588 | printk(KERN_INFO PFX "programming fpga ...\n"); |
| 589 | total_wait = 0; |
| 590 | while (1) { |
| 591 | msleep(wait_period); |
| 592 | total_wait += wait_period; |
| 593 | |
| 594 | card_power = ioread32(bridge + BRIDGE_CARD_POWER_REG); |
| 595 | if (card_power & BRIDGE_CARD_POWER_PROG_DONE) { |
| 596 | printk(KERN_INFO PFX "programming done\n"); |
| 597 | return 0; |
| 598 | } |
| 599 | if (total_wait > prog_timeo) { |
| 600 | printk(KERN_ERR PFX |
| 601 | "timed out while programming FPGA\n"); |
| 602 | return -EIO; |
| 603 | } |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | static void poch_card_power_off(struct poch_dev *poch_dev) |
| 608 | { |
| 609 | void __iomem *bridge = poch_dev->bridge_iomem; |
| 610 | u32 card_power; |
| 611 | |
| 612 | iowrite32(0, bridge + BRIDGE_INT_MASK_REG); |
| 613 | iowrite32(0, bridge + BRIDGE_DMA_GO_REG); |
| 614 | |
| 615 | card_power = ioread32(bridge + BRIDGE_CARD_POWER_REG); |
| 616 | iowrite32(card_power & ~BRIDGE_CARD_POWER_EN, |
| 617 | bridge + BRIDGE_CARD_POWER_REG); |
| 618 | } |
| 619 | |
| 620 | enum clk_src { |
| 621 | CLK_SRC_ON_BOARD, |
| 622 | CLK_SRC_EXTERNAL |
| 623 | }; |
| 624 | |
| 625 | static void poch_card_clock_on(void __iomem *fpga) |
| 626 | { |
| 627 | /* FIXME: Get this data through sysfs? */ |
| 628 | enum clk_src clk_src = CLK_SRC_ON_BOARD; |
| 629 | |
| 630 | if (clk_src == CLK_SRC_ON_BOARD) { |
| 631 | iowrite32(FPGA_ADC_CLOCK_LOCAL_CLK | FPGA_ADC_CLOCK_CTL_OSC_EN, |
| 632 | fpga + FPGA_ADC_CLOCK_CTL_REG); |
| 633 | } else if (clk_src == CLK_SRC_EXTERNAL) { |
| 634 | iowrite32(FPGA_ADC_CLOCK_EXT_SAMP_CLK, |
| 635 | fpga + FPGA_ADC_CLOCK_CTL_REG); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | static int poch_card_power_on(struct poch_dev *poch_dev) |
| 640 | { |
| 641 | void __iomem *bridge = poch_dev->bridge_iomem; |
| 642 | void __iomem *fpga = poch_dev->fpga_iomem; |
| 643 | |
| 644 | iowrite32(BRIDGE_CARD_POWER_EN, bridge + BRIDGE_CARD_POWER_REG); |
| 645 | |
| 646 | if (poch_wait_fpga_prog(bridge) != 0) { |
| 647 | poch_card_power_off(poch_dev); |
| 648 | return -EIO; |
| 649 | } |
| 650 | |
| 651 | poch_card_clock_on(fpga); |
| 652 | |
| 653 | /* Sync to new clock, reset state machines, set DMA mode. */ |
| 654 | iowrite32(FPGA_DOM_DCM_RESET | FPGA_DOM_SOFT_RESET |
| 655 | | FPGA_DOM_DUAL_M_SG_DMA, fpga + FPGA_DOM_REG); |
| 656 | |
| 657 | /* FIXME: The time required for sync. needs to be tuned. */ |
| 658 | msleep(1000); |
| 659 | |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | static void poch_channel_analog_on(struct channel_info *channel) |
| 664 | { |
| 665 | void __iomem *fpga = channel->fpga_iomem; |
| 666 | u32 adc_dac_en; |
| 667 | |
| 668 | spin_lock(channel->iomem_lock); |
| 669 | adc_dac_en = ioread32(fpga + FPGA_ADC_DAC_EN_REG); |
| 670 | switch (channel->chno) { |
| 671 | case CHNO_RX_CHANNEL: |
| 672 | iowrite32(adc_dac_en & ~FPGA_ADC_DAC_EN_ADC_OFF, |
| 673 | fpga + FPGA_ADC_DAC_EN_REG); |
| 674 | break; |
| 675 | case CHNO_TX_CHANNEL: |
| 676 | iowrite32(adc_dac_en & ~FPGA_ADC_DAC_EN_DAC_OFF, |
| 677 | fpga + FPGA_ADC_DAC_EN_REG); |
| 678 | break; |
| 679 | } |
| 680 | spin_unlock(channel->iomem_lock); |
| 681 | } |
| 682 | |
| 683 | static int poch_open(struct inode *inode, struct file *filp) |
| 684 | { |
| 685 | struct poch_dev *poch_dev; |
| 686 | struct channel_info *channel; |
| 687 | void __iomem *bridge; |
| 688 | void __iomem *fpga; |
| 689 | int chno; |
| 690 | int usage; |
| 691 | int ret; |
| 692 | |
| 693 | poch_dev = container_of(inode->i_cdev, struct poch_dev, cdev); |
| 694 | bridge = poch_dev->bridge_iomem; |
| 695 | fpga = poch_dev->fpga_iomem; |
| 696 | |
| 697 | chno = iminor(inode) % poch_dev->nchannels; |
| 698 | channel = &poch_dev->channels[chno]; |
| 699 | |
| 700 | if (!atomic_dec_and_test(&channel->free)) { |
| 701 | atomic_inc(&channel->free); |
| 702 | ret = -EBUSY; |
| 703 | goto out; |
| 704 | } |
| 705 | |
| 706 | usage = atomic_inc_return(&poch_dev->usage); |
| 707 | |
| 708 | printk(KERN_WARNING "poch_card_power_on\n"); |
| 709 | |
| 710 | if (usage == 1) { |
| 711 | ret = poch_card_power_on(poch_dev); |
| 712 | if (ret) |
| 713 | goto out_dec_usage; |
| 714 | } |
| 715 | |
| 716 | printk(KERN_INFO "CardBus Bridge Revision: %x\n", |
| 717 | ioread32(bridge + BRIDGE_REV_REG)); |
| 718 | printk(KERN_INFO "CardBus Interface Revision: %x\n", |
| 719 | ioread32(fpga + FPGA_IFACE_REV_REG)); |
| 720 | |
| 721 | channel->chno = chno; |
| 722 | filp->private_data = channel; |
| 723 | |
| 724 | printk(KERN_WARNING "poch_channel_init\n"); |
| 725 | |
| 726 | ret = poch_channel_init(channel, poch_dev); |
| 727 | if (ret) |
| 728 | goto out_power_off; |
| 729 | |
| 730 | poch_channel_analog_on(channel); |
| 731 | |
| 732 | printk(KERN_WARNING "channel_dma_init\n"); |
| 733 | |
| 734 | channel_dma_init(channel); |
| 735 | |
| 736 | printk(KERN_WARNING "poch_channel_analog_on\n"); |
| 737 | |
| 738 | if (usage == 1) { |
| 739 | printk(KERN_WARNING "setting up DMA\n"); |
| 740 | |
| 741 | /* Initialize DMA Controller. */ |
| 742 | iowrite32(FPGA_CAP_FIFO_REG, bridge + BRIDGE_STAT_2_REG); |
| 743 | iowrite32(FPGA_DMA_DESC_1_REG, bridge + BRIDGE_STAT_3_REG); |
| 744 | |
| 745 | ioread32(fpga + FPGA_DMA_INT_STAT_REG); |
| 746 | ioread32(fpga + FPGA_INT_STAT_REG); |
| 747 | ioread32(bridge + BRIDGE_INT_STAT_REG); |
| 748 | |
| 749 | /* Initialize Interrupts. FIXME: Enable temperature |
| 750 | * handling We are enabling both Tx and Rx channel |
| 751 | * interrupts here. Do we need to enable interrupts |
| 752 | * only for the current channel? Anyways we won't get |
| 753 | * the interrupt unless the DMA is activated. |
| 754 | */ |
| 755 | iowrite32(BRIDGE_INT_FPGA, bridge + BRIDGE_INT_MASK_REG); |
| 756 | iowrite32(FPGA_INT_DMA_CORE |
| 757 | | FPGA_INT_PLL_UNLOCKED |
| 758 | | FPGA_INT_TX_FF_EMPTY |
| 759 | | FPGA_INT_RX_FF_EMPTY |
| 760 | | FPGA_INT_TX_FF_OVRFLW |
| 761 | | FPGA_INT_RX_FF_OVRFLW, |
| 762 | fpga + FPGA_INT_MASK_REG); |
| 763 | iowrite32(FPGA_DMA_INT_RX | FPGA_DMA_INT_TX, |
| 764 | fpga + FPGA_DMA_INT_MASK_REG); |
| 765 | } |
| 766 | |
| 767 | if (channel->dir == CHANNEL_DIR_TX) { |
| 768 | /* Flush TX FIFO and output data from cardbus. */ |
Vijay Kumar | dad1740 | 2009-09-21 11:23:57 +0530 | [diff] [blame] | 769 | u32 ctl_val = 0; |
| 770 | |
| 771 | ctl_val |= FPGA_TX_CTL_FIFO_FLUSH; |
| 772 | ctl_val |= FPGA_TX_CTL_OUTPUT_CARDBUS; |
| 773 | if (loopback) |
| 774 | ctl_val |= FPGA_TX_CTL_LOOPBACK; |
| 775 | |
| 776 | iowrite32(ctl_val, fpga + FPGA_TX_CTL_REG); |
Vijay Kumar | ca21999 | 2008-10-29 08:58:37 +0530 | [diff] [blame] | 777 | } else { |
| 778 | /* Flush RX FIFO and output data to cardbus. */ |
Vijay Kumar B | 16fbf4c | 2009-09-21 11:23:54 +0530 | [diff] [blame] | 779 | u32 ctl_val = FPGA_RX_CTL_CONT_CAP | FPGA_RX_CTL_FIFO_FLUSH; |
| 780 | if (synth_rx) |
| 781 | ctl_val |= FPGA_RX_CTL_SYNTH_DATA; |
| 782 | |
| 783 | iowrite32(ctl_val, fpga + FPGA_RX_CTL_REG); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 784 | } |
| 785 | |
| 786 | atomic_inc(&channel->inited); |
| 787 | |
| 788 | return 0; |
| 789 | |
| 790 | out_power_off: |
| 791 | if (usage == 1) |
| 792 | poch_card_power_off(poch_dev); |
| 793 | out_dec_usage: |
| 794 | atomic_dec(&poch_dev->usage); |
| 795 | atomic_inc(&channel->free); |
| 796 | out: |
| 797 | return ret; |
| 798 | } |
| 799 | |
| 800 | static int poch_release(struct inode *inode, struct file *filp) |
| 801 | { |
| 802 | struct channel_info *channel = filp->private_data; |
| 803 | struct poch_dev *poch_dev; |
| 804 | int usage; |
| 805 | |
| 806 | poch_dev = container_of(inode->i_cdev, struct poch_dev, cdev); |
| 807 | |
| 808 | usage = atomic_dec_return(&poch_dev->usage); |
| 809 | if (usage == 0) { |
| 810 | printk(KERN_WARNING "poch_card_power_off\n"); |
| 811 | poch_card_power_off(poch_dev); |
| 812 | } |
| 813 | |
| 814 | atomic_dec(&channel->inited); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 815 | poch_channel_free_groups(channel); |
| 816 | kfree(channel->groups); |
| 817 | atomic_inc(&channel->free); |
| 818 | |
| 819 | return 0; |
| 820 | } |
| 821 | |
| 822 | /* |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 823 | * Map the the group buffers, to user space. |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 824 | */ |
| 825 | static int poch_mmap(struct file *filp, struct vm_area_struct *vma) |
| 826 | { |
| 827 | struct channel_info *channel = filp->private_data; |
| 828 | |
| 829 | unsigned long start; |
| 830 | unsigned long size; |
| 831 | |
| 832 | unsigned long group_pages; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 833 | unsigned long total_group_pages; |
| 834 | |
| 835 | int pg_num; |
| 836 | struct page *pg; |
| 837 | |
| 838 | int i; |
| 839 | int ret; |
| 840 | |
| 841 | printk(KERN_WARNING "poch_mmap\n"); |
| 842 | |
| 843 | if (vma->vm_pgoff) { |
| 844 | printk(KERN_WARNING PFX "page offset: %lu\n", vma->vm_pgoff); |
| 845 | return -EINVAL; |
| 846 | } |
| 847 | |
Vijay Kumar | ea0a337 | 2008-10-29 08:58:34 +0530 | [diff] [blame] | 848 | group_pages = npages(channel->group_size); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 849 | total_group_pages = group_pages * channel->group_count; |
| 850 | |
| 851 | size = vma->vm_end - vma->vm_start; |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 852 | if (size != total_group_pages * PAGE_SIZE) { |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 853 | printk(KERN_WARNING PFX "required %lu bytes\n", size); |
| 854 | return -EINVAL; |
| 855 | } |
| 856 | |
| 857 | start = vma->vm_start; |
| 858 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 859 | for (i = 0; i < channel->group_count; i++) { |
| 860 | pg = channel->groups[i].pg; |
| 861 | for (pg_num = 0; pg_num < group_pages; pg_num++, pg++) { |
| 862 | printk(KERN_DEBUG PFX "%d: group %d: 0x%lx\n", |
| 863 | pg_num, i, start); |
| 864 | ret = vm_insert_page(vma, start, pg); |
| 865 | if (ret) { |
| 866 | printk(KERN_DEBUG PFX |
| 867 | "vm_insert 2 failed at %d\n", pg_num); |
| 868 | return ret; |
| 869 | } |
| 870 | start += PAGE_SIZE; |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | /* |
| 878 | * Check whether there is some group that the user space has not |
| 879 | * consumed yet. When the user space consumes a group, it sets it to |
| 880 | * -1. Cosuming could be reading data in case of RX and filling a |
| 881 | * buffer in case of TX. |
| 882 | */ |
| 883 | static int poch_channel_available(struct channel_info *channel) |
| 884 | { |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 885 | int available = 0; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 886 | |
| 887 | spin_lock_irq(&channel->group_offsets_lock); |
| 888 | |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 889 | if (channel->consumed != channel->transfer) |
| 890 | available = 1; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 891 | |
| 892 | spin_unlock_irq(&channel->group_offsets_lock); |
| 893 | |
Vijay Kumar B | 92d4503 | 2009-09-21 11:23:58 +0530 | [diff] [blame] | 894 | return available; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 895 | } |
| 896 | |
| 897 | static unsigned int poch_poll(struct file *filp, poll_table *pt) |
| 898 | { |
| 899 | struct channel_info *channel = filp->private_data; |
| 900 | unsigned int ret = 0; |
| 901 | |
| 902 | poll_wait(filp, &channel->wq, pt); |
| 903 | |
| 904 | if (poch_channel_available(channel)) { |
| 905 | if (channel->dir == CHANNEL_DIR_RX) |
| 906 | ret = POLLIN | POLLRDNORM; |
| 907 | else |
| 908 | ret = POLLOUT | POLLWRNORM; |
| 909 | } |
| 910 | |
| 911 | return ret; |
| 912 | } |
| 913 | |
| 914 | static int poch_ioctl(struct inode *inode, struct file *filp, |
| 915 | unsigned int cmd, unsigned long arg) |
| 916 | { |
| 917 | struct channel_info *channel = filp->private_data; |
| 918 | void __iomem *fpga = channel->fpga_iomem; |
| 919 | void __iomem *bridge = channel->bridge_iomem; |
| 920 | void __user *argp = (void __user *)arg; |
| 921 | struct vm_area_struct *vms; |
| 922 | struct poch_counters counters; |
| 923 | int ret; |
| 924 | |
| 925 | switch (cmd) { |
| 926 | case POCH_IOC_TRANSFER_START: |
| 927 | switch (channel->chno) { |
| 928 | case CHNO_TX_CHANNEL: |
| 929 | printk(KERN_INFO PFX "ioctl: Tx start\n"); |
| 930 | iowrite32(0x1, fpga + FPGA_TX_TRIGGER_REG); |
| 931 | iowrite32(0x1, fpga + FPGA_TX_ENABLE_REG); |
| 932 | |
| 933 | /* FIXME: Does it make sense to do a DMA GO |
| 934 | * twice, once in Tx and once in Rx. |
| 935 | */ |
| 936 | iowrite32(0x1, bridge + BRIDGE_DMA_GO_REG); |
| 937 | break; |
| 938 | case CHNO_RX_CHANNEL: |
| 939 | printk(KERN_INFO PFX "ioctl: Rx start\n"); |
| 940 | iowrite32(0x1, fpga + FPGA_RX_ARM_REG); |
| 941 | iowrite32(0x1, bridge + BRIDGE_DMA_GO_REG); |
| 942 | break; |
| 943 | } |
| 944 | break; |
| 945 | case POCH_IOC_TRANSFER_STOP: |
| 946 | switch (channel->chno) { |
| 947 | case CHNO_TX_CHANNEL: |
| 948 | printk(KERN_INFO PFX "ioctl: Tx stop\n"); |
| 949 | iowrite32(0x0, fpga + FPGA_TX_ENABLE_REG); |
| 950 | iowrite32(0x0, fpga + FPGA_TX_TRIGGER_REG); |
| 951 | iowrite32(0x0, bridge + BRIDGE_DMA_GO_REG); |
| 952 | break; |
| 953 | case CHNO_RX_CHANNEL: |
| 954 | printk(KERN_INFO PFX "ioctl: Rx stop\n"); |
| 955 | iowrite32(0x0, fpga + FPGA_RX_ARM_REG); |
| 956 | iowrite32(0x0, bridge + BRIDGE_DMA_GO_REG); |
| 957 | break; |
| 958 | } |
| 959 | break; |
Vijay Kumar B | b01faf0 | 2009-09-21 11:23:55 +0530 | [diff] [blame] | 960 | case POCH_IOC_CONSUME: |
| 961 | { |
| 962 | int available; |
| 963 | int nfetch; |
| 964 | unsigned int from; |
| 965 | unsigned int count; |
| 966 | unsigned int i, j; |
| 967 | struct poch_consume consume; |
| 968 | struct poch_consume *uconsume; |
| 969 | |
| 970 | uconsume = argp; |
| 971 | ret = copy_from_user(&consume, uconsume, sizeof(consume)); |
| 972 | if (ret) |
| 973 | return ret; |
| 974 | |
| 975 | spin_lock_irq(&channel->group_offsets_lock); |
| 976 | |
| 977 | channel->consumed += consume.nflush; |
| 978 | channel->consumed %= channel->group_count; |
| 979 | |
| 980 | available = channel->transfer - channel->consumed; |
| 981 | if (available < 0) |
| 982 | available += channel->group_count; |
| 983 | |
| 984 | from = channel->consumed; |
| 985 | |
| 986 | spin_unlock_irq(&channel->group_offsets_lock); |
| 987 | |
| 988 | nfetch = consume.nfetch; |
| 989 | count = min(available, nfetch); |
| 990 | |
| 991 | for (i = 0; i < count; i++) { |
| 992 | j = (from + i) % channel->group_count; |
| 993 | ret = put_user(channel->groups[j].user_offset, |
| 994 | &consume.offsets[i]); |
| 995 | if (ret) |
| 996 | return -EFAULT; |
| 997 | } |
| 998 | |
| 999 | ret = put_user(count, &uconsume->nfetch); |
| 1000 | if (ret) |
| 1001 | return -EFAULT; |
| 1002 | |
| 1003 | break; |
| 1004 | } |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1005 | case POCH_IOC_GET_COUNTERS: |
Roel Kluin | dcbbcef | 2009-01-28 22:14:17 +0100 | [diff] [blame] | 1006 | if (!access_ok(VERIFY_WRITE, argp, sizeof(struct poch_counters))) |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1007 | return -EFAULT; |
| 1008 | |
| 1009 | spin_lock_irq(&channel->counters_lock); |
| 1010 | counters = channel->counters; |
| 1011 | __poch_channel_clear_counters(channel); |
| 1012 | spin_unlock_irq(&channel->counters_lock); |
| 1013 | |
| 1014 | ret = copy_to_user(argp, &counters, |
| 1015 | sizeof(struct poch_counters)); |
| 1016 | if (ret) |
| 1017 | return ret; |
| 1018 | |
| 1019 | break; |
| 1020 | case POCH_IOC_SYNC_GROUP_FOR_USER: |
| 1021 | case POCH_IOC_SYNC_GROUP_FOR_DEVICE: |
| 1022 | vms = find_vma(current->mm, arg); |
| 1023 | if (!vms) |
| 1024 | /* Address not mapped. */ |
| 1025 | return -EINVAL; |
| 1026 | if (vms->vm_file != filp) |
| 1027 | /* Address mapped from different device/file. */ |
| 1028 | return -EINVAL; |
| 1029 | |
| 1030 | flush_cache_range(vms, arg, arg + channel->group_size); |
| 1031 | break; |
| 1032 | } |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | static struct file_operations poch_fops = { |
| 1037 | .owner = THIS_MODULE, |
| 1038 | .open = poch_open, |
| 1039 | .release = poch_release, |
| 1040 | .ioctl = poch_ioctl, |
| 1041 | .poll = poch_poll, |
| 1042 | .mmap = poch_mmap |
| 1043 | }; |
| 1044 | |
| 1045 | static void poch_irq_dma(struct channel_info *channel) |
| 1046 | { |
| 1047 | u32 prev_transfer; |
| 1048 | u32 curr_transfer; |
| 1049 | long groups_done; |
| 1050 | unsigned long i, j; |
| 1051 | struct poch_group_info *groups; |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1052 | u32 curr_group_reg; |
| 1053 | |
| 1054 | if (!atomic_read(&channel->inited)) |
| 1055 | return; |
| 1056 | |
| 1057 | prev_transfer = channel->transfer; |
| 1058 | |
| 1059 | if (channel->chno == CHNO_RX_CHANNEL) |
| 1060 | curr_group_reg = FPGA_RX_CURR_GROUP_REG; |
| 1061 | else |
| 1062 | curr_group_reg = FPGA_TX_CURR_GROUP_REG; |
| 1063 | |
| 1064 | curr_transfer = ioread32(channel->fpga_iomem + curr_group_reg); |
| 1065 | |
| 1066 | groups_done = curr_transfer - prev_transfer; |
| 1067 | /* Check wrap over, and handle it. */ |
| 1068 | if (groups_done <= 0) |
| 1069 | groups_done += channel->group_count; |
| 1070 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1071 | groups = channel->groups; |
| 1072 | |
| 1073 | spin_lock(&channel->group_offsets_lock); |
| 1074 | |
| 1075 | for (i = 0; i < groups_done; i++) { |
| 1076 | j = (prev_transfer + i) % channel->group_count; |
Vijay Kumar B | b01faf0 | 2009-09-21 11:23:55 +0530 | [diff] [blame] | 1077 | |
| 1078 | channel->transfer += 1; |
| 1079 | channel->transfer %= channel->group_count; |
| 1080 | |
| 1081 | if (channel->transfer == channel->consumed) { |
| 1082 | channel->consumed += 1; |
| 1083 | channel->consumed %= channel->group_count; |
| 1084 | } |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1085 | } |
| 1086 | |
| 1087 | spin_unlock(&channel->group_offsets_lock); |
| 1088 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1089 | wake_up_interruptible(&channel->wq); |
| 1090 | } |
| 1091 | |
| 1092 | static irqreturn_t poch_irq_handler(int irq, void *p) |
| 1093 | { |
| 1094 | struct poch_dev *poch_dev = p; |
| 1095 | void __iomem *bridge = poch_dev->bridge_iomem; |
| 1096 | void __iomem *fpga = poch_dev->fpga_iomem; |
| 1097 | struct channel_info *channel_rx = &poch_dev->channels[CHNO_RX_CHANNEL]; |
| 1098 | struct channel_info *channel_tx = &poch_dev->channels[CHNO_TX_CHANNEL]; |
| 1099 | u32 bridge_stat; |
| 1100 | u32 fpga_stat; |
| 1101 | u32 dma_stat; |
| 1102 | |
| 1103 | bridge_stat = ioread32(bridge + BRIDGE_INT_STAT_REG); |
| 1104 | fpga_stat = ioread32(fpga + FPGA_INT_STAT_REG); |
| 1105 | dma_stat = ioread32(fpga + FPGA_DMA_INT_STAT_REG); |
| 1106 | |
| 1107 | ioread32(fpga + FPGA_DMA_INT_STAT_REG); |
| 1108 | ioread32(fpga + FPGA_INT_STAT_REG); |
| 1109 | ioread32(bridge + BRIDGE_INT_STAT_REG); |
| 1110 | |
| 1111 | if (bridge_stat & BRIDGE_INT_FPGA) { |
| 1112 | if (fpga_stat & FPGA_INT_DMA_CORE) { |
| 1113 | if (dma_stat & FPGA_DMA_INT_RX) |
| 1114 | poch_irq_dma(channel_rx); |
| 1115 | if (dma_stat & FPGA_DMA_INT_TX) |
| 1116 | poch_irq_dma(channel_tx); |
| 1117 | } |
| 1118 | if (fpga_stat & FPGA_INT_PLL_UNLOCKED) { |
| 1119 | channel_tx->counters.pll_unlock++; |
| 1120 | channel_rx->counters.pll_unlock++; |
| 1121 | if (printk_ratelimit()) |
| 1122 | printk(KERN_WARNING PFX "PLL unlocked\n"); |
| 1123 | } |
| 1124 | if (fpga_stat & FPGA_INT_TX_FF_EMPTY) |
| 1125 | channel_tx->counters.fifo_empty++; |
| 1126 | if (fpga_stat & FPGA_INT_TX_FF_OVRFLW) |
| 1127 | channel_tx->counters.fifo_overflow++; |
| 1128 | if (fpga_stat & FPGA_INT_RX_FF_EMPTY) |
| 1129 | channel_rx->counters.fifo_empty++; |
| 1130 | if (fpga_stat & FPGA_INT_RX_FF_OVRFLW) |
| 1131 | channel_rx->counters.fifo_overflow++; |
| 1132 | |
| 1133 | /* |
| 1134 | * FIXME: These errors should be notified through the |
| 1135 | * poll interface as POLLERR. |
| 1136 | */ |
| 1137 | |
| 1138 | /* Re-enable interrupts. */ |
| 1139 | iowrite32(BRIDGE_INT_FPGA, bridge + BRIDGE_INT_MASK_REG); |
| 1140 | |
| 1141 | return IRQ_HANDLED; |
| 1142 | } |
| 1143 | |
| 1144 | return IRQ_NONE; |
| 1145 | } |
| 1146 | |
| 1147 | static void poch_class_dev_unregister(struct poch_dev *poch_dev, int id) |
| 1148 | { |
| 1149 | int i, j; |
| 1150 | int nattrs; |
| 1151 | struct channel_info *channel; |
| 1152 | dev_t devno; |
| 1153 | |
| 1154 | if (poch_dev->dev == NULL) |
| 1155 | return; |
| 1156 | |
| 1157 | for (i = 0; i < poch_dev->nchannels; i++) { |
| 1158 | channel = &poch_dev->channels[i]; |
| 1159 | devno = poch_first_dev + (id * poch_dev->nchannels) + i; |
| 1160 | |
| 1161 | if (!channel->dev) |
| 1162 | continue; |
| 1163 | |
| 1164 | nattrs = sizeof(poch_class_attrs)/sizeof(poch_class_attrs[0]); |
| 1165 | for (j = 0; j < nattrs; j++) |
| 1166 | device_remove_file(channel->dev, poch_class_attrs[j]); |
| 1167 | |
| 1168 | device_unregister(channel->dev); |
| 1169 | } |
| 1170 | |
| 1171 | device_unregister(poch_dev->dev); |
| 1172 | } |
| 1173 | |
| 1174 | static int __devinit poch_class_dev_register(struct poch_dev *poch_dev, |
| 1175 | int id) |
| 1176 | { |
| 1177 | struct device *dev = &poch_dev->pci_dev->dev; |
| 1178 | int i, j; |
| 1179 | int nattrs; |
| 1180 | int ret; |
| 1181 | struct channel_info *channel; |
| 1182 | dev_t devno; |
| 1183 | |
| 1184 | poch_dev->dev = device_create(poch_cls, &poch_dev->pci_dev->dev, |
| 1185 | MKDEV(0, 0), NULL, "poch%d", id); |
| 1186 | if (IS_ERR(poch_dev->dev)) { |
| 1187 | dev_err(dev, "error creating parent class device"); |
| 1188 | ret = PTR_ERR(poch_dev->dev); |
| 1189 | poch_dev->dev = NULL; |
| 1190 | return ret; |
| 1191 | } |
| 1192 | |
| 1193 | for (i = 0; i < poch_dev->nchannels; i++) { |
| 1194 | channel = &poch_dev->channels[i]; |
| 1195 | |
| 1196 | devno = poch_first_dev + (id * poch_dev->nchannels) + i; |
| 1197 | channel->dev = device_create(poch_cls, poch_dev->dev, devno, |
| 1198 | NULL, "ch%d", i); |
| 1199 | if (IS_ERR(channel->dev)) { |
| 1200 | dev_err(dev, "error creating channel class device"); |
| 1201 | ret = PTR_ERR(channel->dev); |
| 1202 | channel->dev = NULL; |
| 1203 | poch_class_dev_unregister(poch_dev, id); |
| 1204 | return ret; |
| 1205 | } |
| 1206 | |
| 1207 | dev_set_drvdata(channel->dev, channel); |
| 1208 | nattrs = sizeof(poch_class_attrs)/sizeof(poch_class_attrs[0]); |
| 1209 | for (j = 0; j < nattrs; j++) { |
| 1210 | ret = device_create_file(channel->dev, |
| 1211 | poch_class_attrs[j]); |
| 1212 | if (ret) { |
| 1213 | dev_err(dev, "error creating attribute file"); |
| 1214 | poch_class_dev_unregister(poch_dev, id); |
| 1215 | return ret; |
| 1216 | } |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | return 0; |
| 1221 | } |
| 1222 | |
| 1223 | static int __devinit poch_pci_probe(struct pci_dev *pdev, |
| 1224 | const struct pci_device_id *pci_id) |
| 1225 | { |
| 1226 | struct device *dev = &pdev->dev; |
| 1227 | struct poch_dev *poch_dev; |
| 1228 | struct uio_info *uio; |
| 1229 | int ret; |
| 1230 | int id; |
| 1231 | int i; |
| 1232 | |
| 1233 | poch_dev = kzalloc(sizeof(struct poch_dev), GFP_KERNEL); |
| 1234 | if (!poch_dev) { |
| 1235 | dev_err(dev, "error allocating priv. data memory\n"); |
| 1236 | return -ENOMEM; |
| 1237 | } |
| 1238 | |
| 1239 | poch_dev->pci_dev = pdev; |
| 1240 | uio = &poch_dev->uio; |
| 1241 | |
| 1242 | pci_set_drvdata(pdev, poch_dev); |
| 1243 | |
| 1244 | spin_lock_init(&poch_dev->iomem_lock); |
| 1245 | |
| 1246 | poch_dev->nchannels = POCH_NCHANNELS; |
| 1247 | poch_dev->channels[CHNO_RX_CHANNEL].dir = CHANNEL_DIR_RX; |
| 1248 | poch_dev->channels[CHNO_TX_CHANNEL].dir = CHANNEL_DIR_TX; |
| 1249 | |
| 1250 | for (i = 0; i < poch_dev->nchannels; i++) { |
| 1251 | init_waitqueue_head(&poch_dev->channels[i].wq); |
| 1252 | atomic_set(&poch_dev->channels[i].free, 1); |
| 1253 | atomic_set(&poch_dev->channels[i].inited, 0); |
| 1254 | } |
| 1255 | |
| 1256 | ret = pci_enable_device(pdev); |
| 1257 | if (ret) { |
| 1258 | dev_err(dev, "error enabling device\n"); |
| 1259 | goto out_free; |
| 1260 | } |
| 1261 | |
| 1262 | ret = pci_request_regions(pdev, "poch"); |
| 1263 | if (ret) { |
| 1264 | dev_err(dev, "error requesting resources\n"); |
| 1265 | goto out_disable; |
| 1266 | } |
| 1267 | |
| 1268 | uio->mem[0].addr = pci_resource_start(pdev, 1); |
| 1269 | if (!uio->mem[0].addr) { |
| 1270 | dev_err(dev, "invalid BAR1\n"); |
| 1271 | ret = -ENODEV; |
| 1272 | goto out_release; |
| 1273 | } |
| 1274 | |
| 1275 | uio->mem[0].size = pci_resource_len(pdev, 1); |
| 1276 | uio->mem[0].memtype = UIO_MEM_PHYS; |
| 1277 | |
| 1278 | uio->name = "poch"; |
| 1279 | uio->version = "0.0.1"; |
| 1280 | uio->irq = -1; |
| 1281 | ret = uio_register_device(dev, uio); |
| 1282 | if (ret) { |
| 1283 | dev_err(dev, "error register UIO device: %d\n", ret); |
| 1284 | goto out_release; |
| 1285 | } |
| 1286 | |
| 1287 | poch_dev->bridge_iomem = ioremap(pci_resource_start(pdev, 0), |
| 1288 | pci_resource_len(pdev, 0)); |
| 1289 | if (poch_dev->bridge_iomem == NULL) { |
| 1290 | dev_err(dev, "error mapping bridge (bar0) registers\n"); |
| 1291 | ret = -ENOMEM; |
| 1292 | goto out_uio_unreg; |
| 1293 | } |
| 1294 | |
| 1295 | poch_dev->fpga_iomem = ioremap(pci_resource_start(pdev, 1), |
| 1296 | pci_resource_len(pdev, 1)); |
| 1297 | if (poch_dev->fpga_iomem == NULL) { |
| 1298 | dev_err(dev, "error mapping fpga (bar1) registers\n"); |
| 1299 | ret = -ENOMEM; |
| 1300 | goto out_bar0_unmap; |
| 1301 | } |
| 1302 | |
| 1303 | ret = request_irq(pdev->irq, poch_irq_handler, IRQF_SHARED, |
Kay Sievers | e913397 | 2008-10-30 01:59:32 +0100 | [diff] [blame] | 1304 | dev_name(dev), poch_dev); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1305 | if (ret) { |
| 1306 | dev_err(dev, "error requesting IRQ %u\n", pdev->irq); |
| 1307 | ret = -ENOMEM; |
| 1308 | goto out_bar1_unmap; |
| 1309 | } |
| 1310 | |
| 1311 | if (!idr_pre_get(&poch_ids, GFP_KERNEL)) { |
| 1312 | dev_err(dev, "error allocating memory ids\n"); |
| 1313 | ret = -ENOMEM; |
| 1314 | goto out_free_irq; |
| 1315 | } |
| 1316 | |
| 1317 | idr_get_new(&poch_ids, poch_dev, &id); |
| 1318 | if (id >= MAX_POCH_CARDS) { |
| 1319 | dev_err(dev, "minors exhausted\n"); |
| 1320 | ret = -EBUSY; |
| 1321 | goto out_free_irq; |
| 1322 | } |
| 1323 | |
| 1324 | cdev_init(&poch_dev->cdev, &poch_fops); |
| 1325 | poch_dev->cdev.owner = THIS_MODULE; |
| 1326 | ret = cdev_add(&poch_dev->cdev, |
| 1327 | poch_first_dev + (id * poch_dev->nchannels), |
| 1328 | poch_dev->nchannels); |
| 1329 | if (ret) { |
| 1330 | dev_err(dev, "error register character device\n"); |
| 1331 | goto out_idr_remove; |
| 1332 | } |
| 1333 | |
| 1334 | ret = poch_class_dev_register(poch_dev, id); |
| 1335 | if (ret) |
| 1336 | goto out_cdev_del; |
| 1337 | |
| 1338 | return 0; |
| 1339 | |
| 1340 | out_cdev_del: |
| 1341 | cdev_del(&poch_dev->cdev); |
| 1342 | out_idr_remove: |
| 1343 | idr_remove(&poch_ids, id); |
| 1344 | out_free_irq: |
| 1345 | free_irq(pdev->irq, poch_dev); |
| 1346 | out_bar1_unmap: |
| 1347 | iounmap(poch_dev->fpga_iomem); |
| 1348 | out_bar0_unmap: |
| 1349 | iounmap(poch_dev->bridge_iomem); |
| 1350 | out_uio_unreg: |
| 1351 | uio_unregister_device(uio); |
| 1352 | out_release: |
| 1353 | pci_release_regions(pdev); |
| 1354 | out_disable: |
| 1355 | pci_disable_device(pdev); |
| 1356 | out_free: |
| 1357 | kfree(poch_dev); |
| 1358 | return ret; |
| 1359 | } |
| 1360 | |
| 1361 | /* |
| 1362 | * FIXME: We are yet to handle the hot unplug case. |
| 1363 | */ |
| 1364 | static void poch_pci_remove(struct pci_dev *pdev) |
| 1365 | { |
| 1366 | struct poch_dev *poch_dev = pci_get_drvdata(pdev); |
| 1367 | struct uio_info *uio = &poch_dev->uio; |
| 1368 | unsigned int minor = MINOR(poch_dev->cdev.dev); |
| 1369 | unsigned int id = minor / poch_dev->nchannels; |
| 1370 | |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1371 | poch_class_dev_unregister(poch_dev, id); |
| 1372 | cdev_del(&poch_dev->cdev); |
| 1373 | idr_remove(&poch_ids, id); |
| 1374 | free_irq(pdev->irq, poch_dev); |
Vijay Kumar | 7dadbbc | 2008-10-29 08:58:35 +0530 | [diff] [blame] | 1375 | iounmap(poch_dev->fpga_iomem); |
| 1376 | iounmap(poch_dev->bridge_iomem); |
Vijay Kumar | a14eddd | 2008-10-19 08:58:46 +0530 | [diff] [blame] | 1377 | uio_unregister_device(uio); |
| 1378 | pci_release_regions(pdev); |
| 1379 | pci_disable_device(pdev); |
| 1380 | pci_set_drvdata(pdev, NULL); |
| 1381 | iounmap(uio->mem[0].internal_addr); |
| 1382 | |
| 1383 | kfree(poch_dev); |
| 1384 | } |
| 1385 | |
| 1386 | static const struct pci_device_id poch_pci_ids[] /* __devinitconst */ = { |
| 1387 | { PCI_DEVICE(PCI_VENDOR_ID_RRAPIDS, |
| 1388 | PCI_DEVICE_ID_RRAPIDS_POCKET_CHANGE) }, |
| 1389 | { 0, } |
| 1390 | }; |
| 1391 | |
| 1392 | static struct pci_driver poch_pci_driver = { |
| 1393 | .name = DRV_NAME, |
| 1394 | .id_table = poch_pci_ids, |
| 1395 | .probe = poch_pci_probe, |
| 1396 | .remove = poch_pci_remove, |
| 1397 | }; |
| 1398 | |
| 1399 | static int __init poch_init_module(void) |
| 1400 | { |
| 1401 | int ret = 0; |
| 1402 | |
| 1403 | ret = alloc_chrdev_region(&poch_first_dev, 0, |
| 1404 | MAX_POCH_DEVICES, DRV_NAME); |
| 1405 | if (ret) { |
| 1406 | printk(KERN_ERR PFX "error allocating device no."); |
| 1407 | return ret; |
| 1408 | } |
| 1409 | |
| 1410 | poch_cls = class_create(THIS_MODULE, "pocketchange"); |
| 1411 | if (IS_ERR(poch_cls)) { |
| 1412 | ret = PTR_ERR(poch_cls); |
| 1413 | goto out_unreg_chrdev; |
| 1414 | } |
| 1415 | |
| 1416 | ret = pci_register_driver(&poch_pci_driver); |
| 1417 | if (ret) { |
| 1418 | printk(KERN_ERR PFX "error register PCI device"); |
| 1419 | goto out_class_destroy; |
| 1420 | } |
| 1421 | |
| 1422 | return 0; |
| 1423 | |
| 1424 | out_class_destroy: |
| 1425 | class_destroy(poch_cls); |
| 1426 | |
| 1427 | out_unreg_chrdev: |
| 1428 | unregister_chrdev_region(poch_first_dev, MAX_POCH_DEVICES); |
| 1429 | |
| 1430 | return ret; |
| 1431 | } |
| 1432 | |
| 1433 | static void __exit poch_exit_module(void) |
| 1434 | { |
| 1435 | pci_unregister_driver(&poch_pci_driver); |
| 1436 | class_destroy(poch_cls); |
| 1437 | unregister_chrdev_region(poch_first_dev, MAX_POCH_DEVICES); |
| 1438 | } |
| 1439 | |
| 1440 | module_init(poch_init_module); |
| 1441 | module_exit(poch_exit_module); |
| 1442 | |
| 1443 | MODULE_LICENSE("GPL v2"); |