Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | saa7146.o - driver for generic saa7146-based hardware |
| 3 | |
| 4 | Copyright (C) 1998-2003 Michael Hunold <michael@mihu.de> |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #include <media/saa7146.h> |
| 22 | |
| 23 | LIST_HEAD(saa7146_devices); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 24 | DEFINE_MUTEX(saa7146_devices_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Johannes Stezenbach | c2c62d8 | 2005-05-16 21:54:20 -0700 | [diff] [blame] | 26 | static int saa7146_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | |
Johannes Stezenbach | c2c62d8 | 2005-05-16 21:54:20 -0700 | [diff] [blame] | 28 | unsigned int saa7146_debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Oliver Endriss | 804b445 | 2007-07-12 20:37:50 -0300 | [diff] [blame] | 30 | module_param(saa7146_debug, uint, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | MODULE_PARM_DESC(saa7146_debug, "debug level (default: 0)"); |
| 32 | |
| 33 | #if 0 |
| 34 | static void dump_registers(struct saa7146_dev* dev) |
| 35 | { |
| 36 | int i = 0; |
| 37 | |
| 38 | INFO((" @ %li jiffies:\n",jiffies)); |
| 39 | for(i = 0; i <= 0x148; i+=4) { |
| 40 | printk("0x%03x: 0x%08x\n",i,saa7146_read(dev,i)); |
| 41 | } |
| 42 | } |
| 43 | #endif |
| 44 | |
| 45 | /**************************************************************************** |
| 46 | * gpio and debi helper functions |
| 47 | ****************************************************************************/ |
| 48 | |
| 49 | void saa7146_setgpio(struct saa7146_dev *dev, int port, u32 data) |
| 50 | { |
| 51 | u32 value = 0; |
| 52 | |
| 53 | BUG_ON(port > 3); |
| 54 | |
| 55 | value = saa7146_read(dev, GPIO_CTRL); |
| 56 | value &= ~(0xff << (8*port)); |
| 57 | value |= (data << (8*port)); |
| 58 | saa7146_write(dev, GPIO_CTRL, value); |
| 59 | } |
| 60 | |
| 61 | /* This DEBI code is based on the saa7146 Stradis driver by Nathan Laredo */ |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 62 | static inline int saa7146_wait_for_debi_done_sleep(struct saa7146_dev *dev, |
| 63 | unsigned long us1, unsigned long us2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 65 | unsigned long timeout; |
Oliver Endriss | 25de192 | 2005-07-07 17:58:28 -0700 | [diff] [blame] | 66 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
| 68 | /* wait for registers to be programmed */ |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 69 | timeout = jiffies + usecs_to_jiffies(us1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | while (1) { |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 71 | err = time_after(jiffies, timeout); |
Oliver Endriss | 25de192 | 2005-07-07 17:58:28 -0700 | [diff] [blame] | 72 | if (saa7146_read(dev, MC2) & 2) |
| 73 | break; |
| 74 | if (err) { |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 75 | printk(KERN_ERR "%s: %s timed out while waiting for " |
| 76 | "registers getting programmed\n", |
Harvey Harrison | 536a0b1 | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 77 | dev->name, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | return -ETIMEDOUT; |
| 79 | } |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 80 | msleep(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | } |
| 82 | |
| 83 | /* wait for transfer to complete */ |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 84 | timeout = jiffies + usecs_to_jiffies(us2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | while (1) { |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 86 | err = time_after(jiffies, timeout); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S)) |
| 88 | break; |
| 89 | saa7146_read(dev, MC2); |
Oliver Endriss | 25de192 | 2005-07-07 17:58:28 -0700 | [diff] [blame] | 90 | if (err) { |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 91 | DEB_S(("%s: %s timed out while waiting for transfer " |
Harvey Harrison | 536a0b1 | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 92 | "completion\n", dev->name, __func__)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | return -ETIMEDOUT; |
| 94 | } |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 95 | msleep(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | return 0; |
| 99 | } |
| 100 | |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 101 | static inline int saa7146_wait_for_debi_done_busyloop(struct saa7146_dev *dev, |
| 102 | unsigned long us1, unsigned long us2) |
| 103 | { |
| 104 | unsigned long loops; |
| 105 | |
| 106 | /* wait for registers to be programmed */ |
| 107 | loops = us1; |
| 108 | while (1) { |
| 109 | if (saa7146_read(dev, MC2) & 2) |
| 110 | break; |
| 111 | if (!loops--) { |
| 112 | printk(KERN_ERR "%s: %s timed out while waiting for " |
| 113 | "registers getting programmed\n", |
Harvey Harrison | 536a0b1 | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 114 | dev->name, __func__); |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 115 | return -ETIMEDOUT; |
| 116 | } |
| 117 | udelay(1); |
| 118 | } |
| 119 | |
| 120 | /* wait for transfer to complete */ |
| 121 | loops = us2 / 5; |
| 122 | while (1) { |
| 123 | if (!(saa7146_read(dev, PSR) & SPCI_DEBI_S)) |
| 124 | break; |
| 125 | saa7146_read(dev, MC2); |
| 126 | if (!loops--) { |
| 127 | DEB_S(("%s: %s timed out while waiting for transfer " |
Harvey Harrison | 536a0b1 | 2008-04-08 23:20:00 -0300 | [diff] [blame] | 128 | "completion\n", dev->name, __func__)); |
Oliver Endriss | 26ac14e | 2007-10-31 00:39:48 -0300 | [diff] [blame] | 129 | return -ETIMEDOUT; |
| 130 | } |
| 131 | udelay(5); |
| 132 | } |
| 133 | |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | int saa7146_wait_for_debi_done(struct saa7146_dev *dev, int nobusyloop) |
| 138 | { |
| 139 | if (nobusyloop) |
| 140 | return saa7146_wait_for_debi_done_sleep(dev, 50000, 250000); |
| 141 | else |
| 142 | return saa7146_wait_for_debi_done_busyloop(dev, 50000, 250000); |
| 143 | } |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | /**************************************************************************** |
| 146 | * general helper functions |
| 147 | ****************************************************************************/ |
| 148 | |
Mauro Carvalho Chehab | c1accaa | 2007-08-23 16:37:49 -0300 | [diff] [blame] | 149 | /* this is videobuf_vmalloc_to_sg() from videobuf-dma-sg.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | make sure virt has been allocated with vmalloc_32(), otherwise the BUG() |
| 151 | may be triggered on highmem machines */ |
| 152 | static struct scatterlist* vmalloc_to_sg(unsigned char *virt, int nr_pages) |
| 153 | { |
| 154 | struct scatterlist *sglist; |
| 155 | struct page *pg; |
| 156 | int i; |
| 157 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 158 | sglist = kcalloc(nr_pages, sizeof(struct scatterlist), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | if (NULL == sglist) |
| 160 | return NULL; |
Jens Axboe | 45711f1 | 2007-10-22 21:19:53 +0200 | [diff] [blame] | 161 | sg_init_table(sglist, nr_pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | for (i = 0; i < nr_pages; i++, virt += PAGE_SIZE) { |
| 163 | pg = vmalloc_to_page(virt); |
| 164 | if (NULL == pg) |
| 165 | goto err; |
Eric Sesterhenn | ae24601 | 2006-03-13 13:17:11 -0300 | [diff] [blame] | 166 | BUG_ON(PageHighMem(pg)); |
Jens Axboe | 642f14903 | 2007-10-24 11:20:47 +0200 | [diff] [blame] | 167 | sg_set_page(&sglist[i], pg, PAGE_SIZE, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | return sglist; |
| 170 | |
| 171 | err: |
| 172 | kfree(sglist); |
| 173 | return NULL; |
| 174 | } |
| 175 | |
| 176 | /********************************************************************************/ |
| 177 | /* common page table functions */ |
| 178 | |
Oliver Endriss | 804b445 | 2007-07-12 20:37:50 -0300 | [diff] [blame] | 179 | void *saa7146_vmalloc_build_pgtable(struct pci_dev *pci, long length, struct saa7146_pgtable *pt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
| 181 | int pages = (length+PAGE_SIZE-1)/PAGE_SIZE; |
Oliver Endriss | 804b445 | 2007-07-12 20:37:50 -0300 | [diff] [blame] | 182 | void *mem = vmalloc_32(length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | int slen = 0; |
| 184 | |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 185 | if (NULL == mem) |
| 186 | goto err_null; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 188 | if (!(pt->slist = vmalloc_to_sg(mem, pages))) |
| 189 | goto err_free_mem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 191 | if (saa7146_pgtable_alloc(pci, pt)) |
| 192 | goto err_free_slist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 194 | pt->nents = pages; |
| 195 | slen = pci_map_sg(pci,pt->slist,pt->nents,PCI_DMA_FROMDEVICE); |
| 196 | if (0 == slen) |
| 197 | goto err_free_pgtable; |
| 198 | |
| 199 | if (0 != saa7146_pgtable_build_single(pci, pt, pt->slist, slen)) |
| 200 | goto err_unmap_sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
| 202 | return mem; |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 203 | |
| 204 | err_unmap_sg: |
| 205 | pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE); |
| 206 | err_free_pgtable: |
| 207 | saa7146_pgtable_free(pci, pt); |
| 208 | err_free_slist: |
| 209 | kfree(pt->slist); |
| 210 | pt->slist = NULL; |
| 211 | err_free_mem: |
| 212 | vfree(mem); |
| 213 | err_null: |
| 214 | return NULL; |
| 215 | } |
| 216 | |
Oliver Endriss | 804b445 | 2007-07-12 20:37:50 -0300 | [diff] [blame] | 217 | void saa7146_vfree_destroy_pgtable(struct pci_dev *pci, void *mem, struct saa7146_pgtable *pt) |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 218 | { |
| 219 | pci_unmap_sg(pci, pt->slist, pt->nents, PCI_DMA_FROMDEVICE); |
| 220 | saa7146_pgtable_free(pci, pt); |
| 221 | kfree(pt->slist); |
| 222 | pt->slist = NULL; |
| 223 | vfree(mem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt) |
| 227 | { |
| 228 | if (NULL == pt->cpu) |
| 229 | return; |
| 230 | pci_free_consistent(pci, pt->size, pt->cpu, pt->dma); |
| 231 | pt->cpu = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt) |
| 235 | { |
Mauro Carvalho Chehab | afd1a0c | 2005-12-12 00:37:27 -0800 | [diff] [blame] | 236 | u32 *cpu; |
| 237 | dma_addr_t dma_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | cpu = pci_alloc_consistent(pci, PAGE_SIZE, &dma_addr); |
| 240 | if (NULL == cpu) { |
| 241 | return -ENOMEM; |
| 242 | } |
| 243 | pt->size = PAGE_SIZE; |
| 244 | pt->cpu = cpu; |
| 245 | pt->dma = dma_addr; |
| 246 | |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, |
| 251 | struct scatterlist *list, int sglen ) |
| 252 | { |
| 253 | u32 *ptr, fill; |
| 254 | int nr_pages = 0; |
| 255 | int i,p; |
| 256 | |
| 257 | BUG_ON(0 == sglen); |
| 258 | BUG_ON(list->offset > PAGE_SIZE); |
| 259 | |
| 260 | /* if we have a user buffer, the first page may not be |
| 261 | aligned to a page boundary. */ |
| 262 | pt->offset = list->offset; |
| 263 | |
| 264 | ptr = pt->cpu; |
| 265 | for (i = 0; i < sglen; i++, list++) { |
| 266 | /* |
| 267 | printk("i:%d, adr:0x%08x, len:%d, offset:%d\n", i,sg_dma_address(list), sg_dma_len(list), list->offset); |
| 268 | */ |
| 269 | for (p = 0; p * 4096 < list->length; p++, ptr++) { |
| 270 | *ptr = cpu_to_le32(sg_dma_address(list) + p * 4096); |
| 271 | nr_pages++; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | |
| 276 | /* safety; fill the page table up with the last valid page */ |
| 277 | fill = *(ptr-1); |
| 278 | for(i=nr_pages;i<1024;i++) { |
| 279 | *ptr++ = fill; |
| 280 | } |
| 281 | |
| 282 | /* |
| 283 | ptr = pt->cpu; |
| 284 | printk("offset: %d\n",pt->offset); |
| 285 | for(i=0;i<5;i++) { |
| 286 | printk("ptr1 %d: 0x%08x\n",i,ptr[i]); |
| 287 | } |
| 288 | */ |
| 289 | return 0; |
| 290 | } |
| 291 | |
| 292 | /********************************************************************************/ |
| 293 | /* interrupt handler */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 294 | static irqreturn_t interrupt_hw(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
| 296 | struct saa7146_dev *dev = dev_id; |
Oliver Endriss | 276e49a | 2007-08-09 02:41:16 -0300 | [diff] [blame] | 297 | u32 isr; |
| 298 | u32 ack_isr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | /* read out the interrupt status register */ |
Oliver Endriss | 276e49a | 2007-08-09 02:41:16 -0300 | [diff] [blame] | 301 | ack_isr = isr = saa7146_read(dev, ISR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | /* is this our interrupt? */ |
| 304 | if ( 0 == isr ) { |
| 305 | /* nope, some other device */ |
| 306 | return IRQ_NONE; |
| 307 | } |
| 308 | |
Al Viro | 5fa1247 | 2008-03-29 03:07:38 +0000 | [diff] [blame] | 309 | if (dev->ext) { |
| 310 | if (dev->ext->irq_mask & isr) { |
| 311 | if (dev->ext->irq_func) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | dev->ext->irq_func(dev, &isr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | isr &= ~dev->ext->irq_mask; |
| 314 | } |
| 315 | } |
| 316 | if (0 != (isr & (MASK_27))) { |
| 317 | DEB_INT(("irq: RPS0 (0x%08x).\n",isr)); |
Al Viro | 5fa1247 | 2008-03-29 03:07:38 +0000 | [diff] [blame] | 318 | if (dev->vv_data && dev->vv_callback) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | dev->vv_callback(dev,isr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | isr &= ~MASK_27; |
| 321 | } |
| 322 | if (0 != (isr & (MASK_28))) { |
Al Viro | 5fa1247 | 2008-03-29 03:07:38 +0000 | [diff] [blame] | 323 | if (dev->vv_data && dev->vv_callback) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | dev->vv_callback(dev,isr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | isr &= ~MASK_28; |
| 326 | } |
| 327 | if (0 != (isr & (MASK_16|MASK_17))) { |
Oliver Endriss | 276e49a | 2007-08-09 02:41:16 -0300 | [diff] [blame] | 328 | SAA7146_IER_DISABLE(dev, MASK_16|MASK_17); |
| 329 | /* only wake up if we expect something */ |
| 330 | if (0 != dev->i2c_op) { |
| 331 | dev->i2c_op = 0; |
| 332 | wake_up(&dev->i2c_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } else { |
Oliver Endriss | 276e49a | 2007-08-09 02:41:16 -0300 | [diff] [blame] | 334 | u32 psr = saa7146_read(dev, PSR); |
| 335 | u32 ssr = saa7146_read(dev, SSR); |
| 336 | printk(KERN_WARNING "%s: unexpected i2c irq: isr %08x psr %08x ssr %08x\n", |
| 337 | dev->name, isr, psr, ssr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | } |
| 339 | isr &= ~(MASK_16|MASK_17); |
| 340 | } |
| 341 | if( 0 != isr ) { |
| 342 | ERR(("warning: interrupt enabled, but not handled properly.(0x%08x)\n",isr)); |
| 343 | ERR(("disabling interrupt source(s)!\n")); |
| 344 | SAA7146_IER_DISABLE(dev,isr); |
| 345 | } |
Oliver Endriss | 276e49a | 2007-08-09 02:41:16 -0300 | [diff] [blame] | 346 | saa7146_write(dev, ISR, ack_isr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | return IRQ_HANDLED; |
| 348 | } |
| 349 | |
| 350 | /*********************************************************************************/ |
| 351 | /* configuration-functions */ |
| 352 | |
| 353 | static int saa7146_init_one(struct pci_dev *pci, const struct pci_device_id *ent) |
| 354 | { |
| 355 | struct saa7146_pci_extension_data *pci_ext = (struct saa7146_pci_extension_data *)ent->driver_data; |
| 356 | struct saa7146_extension *ext = pci_ext->ext; |
| 357 | struct saa7146_dev *dev; |
| 358 | int err = -ENOMEM; |
| 359 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 360 | /* clear out mem for sure */ |
| 361 | dev = kzalloc(sizeof(struct saa7146_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | if (!dev) { |
| 363 | ERR(("out of memory.\n")); |
| 364 | goto out; |
| 365 | } |
| 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | DEB_EE(("pci:%p\n",pci)); |
| 368 | |
| 369 | err = pci_enable_device(pci); |
| 370 | if (err < 0) { |
| 371 | ERR(("pci_enable_device() failed.\n")); |
| 372 | goto err_free; |
| 373 | } |
| 374 | |
| 375 | /* enable bus-mastering */ |
| 376 | pci_set_master(pci); |
| 377 | |
| 378 | dev->pci = pci; |
| 379 | |
| 380 | /* get chip-revision; this is needed to enable bug-fixes */ |
| 381 | err = pci_read_config_dword(pci, PCI_CLASS_REVISION, &dev->revision); |
| 382 | if (err < 0) { |
| 383 | ERR(("pci_read_config_dword() failed.\n")); |
| 384 | goto err_disable; |
| 385 | } |
| 386 | dev->revision &= 0xf; |
| 387 | |
Joe Perches | c84e603 | 2008-02-03 17:18:59 +0200 | [diff] [blame] | 388 | /* remap the memory from virtual to physical address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | err = pci_request_region(pci, 0, "saa7146"); |
| 391 | if (err < 0) |
| 392 | goto err_disable; |
| 393 | |
| 394 | dev->mem = ioremap(pci_resource_start(pci, 0), |
| 395 | pci_resource_len(pci, 0)); |
| 396 | if (!dev->mem) { |
| 397 | ERR(("ioremap() failed.\n")); |
| 398 | err = -ENODEV; |
| 399 | goto err_release; |
| 400 | } |
| 401 | |
| 402 | /* we don't do a master reset here anymore, it screws up |
| 403 | some boards that don't have an i2c-eeprom for configuration |
| 404 | values */ |
| 405 | /* |
| 406 | saa7146_write(dev, MC1, MASK_31); |
| 407 | */ |
| 408 | |
| 409 | /* disable all irqs */ |
| 410 | saa7146_write(dev, IER, 0); |
| 411 | |
| 412 | /* shut down all dma transfers and rps tasks */ |
| 413 | saa7146_write(dev, MC1, 0x30ff0000); |
| 414 | |
| 415 | /* clear out any rps-signals pending */ |
| 416 | saa7146_write(dev, MC2, 0xf8000000); |
| 417 | |
| 418 | /* request an interrupt for the saa7146 */ |
Thomas Gleixner | 8076fe3 | 2006-07-01 19:29:37 -0700 | [diff] [blame] | 419 | err = request_irq(pci->irq, interrupt_hw, IRQF_SHARED | IRQF_DISABLED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | dev->name, dev); |
| 421 | if (err < 0) { |
| 422 | ERR(("request_irq() failed.\n")); |
| 423 | goto err_unmap; |
| 424 | } |
| 425 | |
| 426 | err = -ENOMEM; |
| 427 | |
| 428 | /* get memory for various stuff */ |
| 429 | dev->d_rps0.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 430 | &dev->d_rps0.dma_handle); |
| 431 | if (!dev->d_rps0.cpu_addr) |
| 432 | goto err_free_irq; |
| 433 | memset(dev->d_rps0.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 434 | |
| 435 | dev->d_rps1.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 436 | &dev->d_rps1.dma_handle); |
| 437 | if (!dev->d_rps1.cpu_addr) |
| 438 | goto err_free_rps0; |
| 439 | memset(dev->d_rps1.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 440 | |
| 441 | dev->d_i2c.cpu_addr = pci_alloc_consistent(pci, SAA7146_RPS_MEM, |
| 442 | &dev->d_i2c.dma_handle); |
| 443 | if (!dev->d_i2c.cpu_addr) |
| 444 | goto err_free_rps1; |
| 445 | memset(dev->d_i2c.cpu_addr, 0x0, SAA7146_RPS_MEM); |
| 446 | |
| 447 | /* the rest + print status message */ |
| 448 | |
| 449 | /* create a nice device name */ |
| 450 | sprintf(dev->name, "saa7146 (%d)", saa7146_num); |
| 451 | |
| 452 | INFO(("found saa7146 @ mem %p (revision %d, irq %d) (0x%04x,0x%04x).\n", dev->mem, dev->revision, pci->irq, pci->subsystem_vendor, pci->subsystem_device)); |
| 453 | dev->ext = ext; |
| 454 | |
| 455 | pci_set_drvdata(pci, dev); |
| 456 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 457 | mutex_init(&dev->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | spin_lock_init(&dev->int_slock); |
| 459 | spin_lock_init(&dev->slock); |
| 460 | |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 461 | mutex_init(&dev->i2c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | |
| 463 | dev->module = THIS_MODULE; |
| 464 | init_waitqueue_head(&dev->i2c_wq); |
| 465 | |
| 466 | /* set some sane pci arbitrition values */ |
| 467 | saa7146_write(dev, PCI_BT_V1, 0x1c00101f); |
| 468 | |
| 469 | /* TODO: use the status code of the callback */ |
| 470 | |
| 471 | err = -ENODEV; |
| 472 | |
| 473 | if (ext->probe && ext->probe(dev)) { |
| 474 | DEB_D(("ext->probe() failed for %p. skipping device.\n",dev)); |
| 475 | goto err_free_i2c; |
| 476 | } |
| 477 | |
| 478 | if (ext->attach(dev, pci_ext)) { |
| 479 | DEB_D(("ext->attach() failed for %p. skipping device.\n",dev)); |
| 480 | goto err_unprobe; |
| 481 | } |
| 482 | |
| 483 | INIT_LIST_HEAD(&dev->item); |
| 484 | list_add_tail(&dev->item,&saa7146_devices); |
| 485 | saa7146_num++; |
| 486 | |
| 487 | err = 0; |
| 488 | out: |
| 489 | return err; |
| 490 | |
| 491 | err_unprobe: |
| 492 | pci_set_drvdata(pci, NULL); |
| 493 | err_free_i2c: |
| 494 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_i2c.cpu_addr, |
| 495 | dev->d_i2c.dma_handle); |
| 496 | err_free_rps1: |
| 497 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps1.cpu_addr, |
| 498 | dev->d_rps1.dma_handle); |
| 499 | err_free_rps0: |
| 500 | pci_free_consistent(pci, SAA7146_RPS_MEM, dev->d_rps0.cpu_addr, |
| 501 | dev->d_rps0.dma_handle); |
| 502 | err_free_irq: |
| 503 | free_irq(pci->irq, (void *)dev); |
| 504 | err_unmap: |
| 505 | iounmap(dev->mem); |
| 506 | err_release: |
| 507 | pci_release_region(pci, 0); |
| 508 | err_disable: |
| 509 | pci_disable_device(pci); |
| 510 | err_free: |
| 511 | kfree(dev); |
| 512 | goto out; |
| 513 | } |
| 514 | |
| 515 | static void saa7146_remove_one(struct pci_dev *pdev) |
| 516 | { |
| 517 | struct saa7146_dev* dev = pci_get_drvdata(pdev); |
| 518 | struct { |
| 519 | void *addr; |
| 520 | dma_addr_t dma; |
| 521 | } dev_map[] = { |
| 522 | { dev->d_i2c.cpu_addr, dev->d_i2c.dma_handle }, |
| 523 | { dev->d_rps1.cpu_addr, dev->d_rps1.dma_handle }, |
| 524 | { dev->d_rps0.cpu_addr, dev->d_rps0.dma_handle }, |
| 525 | { NULL, 0 } |
| 526 | }, *p; |
| 527 | |
| 528 | DEB_EE(("dev:%p\n",dev)); |
| 529 | |
| 530 | dev->ext->detach(dev); |
| 531 | |
| 532 | /* shut down all video dma transfers */ |
| 533 | saa7146_write(dev, MC1, 0x00ff0000); |
| 534 | |
| 535 | /* disable all irqs, release irq-routine */ |
| 536 | saa7146_write(dev, IER, 0); |
| 537 | |
| 538 | free_irq(pdev->irq, dev); |
| 539 | |
| 540 | for (p = dev_map; p->addr; p++) |
| 541 | pci_free_consistent(pdev, SAA7146_RPS_MEM, p->addr, p->dma); |
| 542 | |
| 543 | iounmap(dev->mem); |
| 544 | pci_release_region(pdev, 0); |
| 545 | list_del(&dev->item); |
| 546 | pci_disable_device(pdev); |
| 547 | kfree(dev); |
| 548 | |
| 549 | saa7146_num--; |
| 550 | } |
| 551 | |
| 552 | /*********************************************************************************/ |
| 553 | /* extension handling functions */ |
| 554 | |
| 555 | int saa7146_register_extension(struct saa7146_extension* ext) |
| 556 | { |
| 557 | DEB_EE(("ext:%p\n",ext)); |
| 558 | |
| 559 | ext->driver.name = ext->name; |
| 560 | ext->driver.id_table = ext->pci_tbl; |
| 561 | ext->driver.probe = saa7146_init_one; |
| 562 | ext->driver.remove = saa7146_remove_one; |
| 563 | |
| 564 | printk("saa7146: register extension '%s'.\n",ext->name); |
Christophe Lucas | 178c6ef | 2005-07-07 17:57:47 -0700 | [diff] [blame] | 565 | return pci_register_driver(&ext->driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | } |
| 567 | |
| 568 | int saa7146_unregister_extension(struct saa7146_extension* ext) |
| 569 | { |
| 570 | DEB_EE(("ext:%p\n",ext)); |
| 571 | printk("saa7146: unregister extension '%s'.\n",ext->name); |
| 572 | pci_unregister_driver(&ext->driver); |
| 573 | return 0; |
| 574 | } |
| 575 | |
| 576 | EXPORT_SYMBOL_GPL(saa7146_register_extension); |
| 577 | EXPORT_SYMBOL_GPL(saa7146_unregister_extension); |
| 578 | |
| 579 | /* misc functions used by extension modules */ |
| 580 | EXPORT_SYMBOL_GPL(saa7146_pgtable_alloc); |
| 581 | EXPORT_SYMBOL_GPL(saa7146_pgtable_free); |
| 582 | EXPORT_SYMBOL_GPL(saa7146_pgtable_build_single); |
| 583 | EXPORT_SYMBOL_GPL(saa7146_vmalloc_build_pgtable); |
Jon Burgess | 87c3019 | 2007-05-03 12:23:44 -0300 | [diff] [blame] | 584 | EXPORT_SYMBOL_GPL(saa7146_vfree_destroy_pgtable); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | EXPORT_SYMBOL_GPL(saa7146_wait_for_debi_done); |
| 586 | |
| 587 | EXPORT_SYMBOL_GPL(saa7146_setgpio); |
| 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | EXPORT_SYMBOL_GPL(saa7146_i2c_adapter_prepare); |
| 590 | |
| 591 | EXPORT_SYMBOL_GPL(saa7146_debug); |
| 592 | EXPORT_SYMBOL_GPL(saa7146_devices); |
| 593 | EXPORT_SYMBOL_GPL(saa7146_devices_lock); |
| 594 | |
| 595 | MODULE_AUTHOR("Michael Hunold <michael@mihu.de>"); |
| 596 | MODULE_DESCRIPTION("driver for generic saa7146-based hardware"); |
| 597 | MODULE_LICENSE("GPL"); |