2 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
4 * flexcop-pci.c - covers the PCI part including DMA transfers.
6 * see flexcop.c for copyright information.
9 #define FC_LOG_PREFIX "flexcop-pci"
10 #include "flexcop-common.h"
12 static int enable_pid_filtering = 0;
13 module_param(enable_pid_filtering, int, 0444);
14 MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1");
16 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
17 #define dprintk(level,args...) \
18 do { if ((debug & level)) printk(args); } while (0)
21 #define dprintk(level,args...)
22 #define DEBSTATUS " (debugging is not enabled)"
25 #define deb_info(args...) dprintk(0x01,args)
26 #define deb_reg(args...) dprintk(0x02,args)
27 #define deb_ts(args...) dprintk(0x04,args)
28 #define deb_irq(args...) dprintk(0x08,args)
31 module_param(debug, int, 0644);
32 MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS);
34 #define DRIVER_VERSION "0.1"
35 #define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver"
36 #define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"
41 #define FC_PCI_INIT 0x01
42 #define FC_PCI_DMA_INIT 0x02
47 /* buffersize (at least for DMA1, need to be % 188 == 0,
48 * this is logic is required */
49 #define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188)
50 #define FC_DEFAULT_DMA2_BUFSIZE (10 * 188)
51 struct flexcop_dma dma[2];
53 int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */
54 u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occured */
58 struct flexcop_device *fc_dev;
61 static int lastwreg,lastwval,lastrreg,lastrval;
63 static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r)
65 struct flexcop_pci *fc_pci = fc->bus_specific;
67 v.raw = readl(fc_pci->io_mem + r);
69 if (lastrreg != r || lastrval != v.raw) {
70 lastrreg = r; lastrval = v.raw;
71 deb_reg("new rd: %3x: %08x\n",r,v.raw);
77 static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v)
79 struct flexcop_pci *fc_pci = fc->bus_specific;
81 if (lastwreg != r || lastwval != v.raw) {
82 lastwreg = r; lastwval = v.raw;
83 deb_reg("new wr: %3x: %08x\n",r,v.raw);
86 writel(v.raw, fc_pci->io_mem + r);
90 /* When PID filtering is turned on, we use the timer IRQ, because small amounts
91 * of data need to be passed to the user space instantly as well. When PID
92 * filtering is turned off, we use the page-change-IRQ */
93 static irqreturn_t flexcop_pci_irq(int irq, void *dev_id, struct pt_regs *regs)
95 struct flexcop_pci *fc_pci = dev_id;
96 struct flexcop_device *fc = fc_pci->fc_dev;
97 flexcop_ibi_value v = fc->read_ibi_reg(fc,irq_20c);
98 irqreturn_t ret = IRQ_HANDLED;
100 spin_lock_irq(&fc_pci->irq_lock);
102 deb_irq("irq: %08x cur_addr: %08x (%d), our addrs. 1: %08x 2: %08x; 0x000: "
103 "%08x, 0x00c: %08x\n",v.raw,
104 fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2,
105 fc_pci->active_dma1_addr,
106 fc_pci->dma[0].dma_addr0,fc_pci->dma[0].dma_addr1,
107 fc->read_ibi_reg(fc,dma1_000).raw,
108 fc->read_ibi_reg(fc,dma1_00c).raw);
111 if (v.irq_20c.DMA1_IRQ_Status == 1) {
112 if (fc_pci->active_dma1_addr == 0)
113 flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188);
115 flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188);
117 deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
118 fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
119 } else if (v.irq_20c.DMA1_Timer_Status == 1) {
120 /* for the timer IRQ we only can use buffer dmx feeding, because we don't have
121 * complete TS packets when reading from the DMA memory */
122 dma_addr_t cur_addr =
123 fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
124 u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
126 /* buffer end was reached, restarted from the beginning
127 * pass the data from last_cur_pos to the buffer end to the demux
129 if (cur_pos < fc_pci->last_dma1_cur_pos) {
130 flexcop_pass_dmx_data(fc_pci->fc_dev,
131 fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
132 (fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos);
133 fc_pci->last_dma1_cur_pos = 0;
136 if (cur_pos > fc_pci->last_dma1_cur_pos) {
137 flexcop_pass_dmx_data(fc_pci->fc_dev,
138 fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
139 cur_pos - fc_pci->last_dma1_cur_pos);
142 fc_pci->last_dma1_cur_pos = cur_pos;
146 spin_unlock_irq(&fc_pci->irq_lock);
148 /* packet count would be ideal for hw filtering, but it isn't working. Either
149 * the data book is wrong, or I'm unable to read it correctly */
151 /* if (v.irq_20c.DMA1_Size_IRQ_Status == 1) { packet counter */
156 static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
158 struct flexcop_pci *fc_pci = fc->bus_specific;
160 flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1);
161 flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1);
162 flexcop_dma_config_timer(fc,FC_DMA_1,1);
164 if (fc_pci->fc_dev->pid_filtering) {
165 fc_pci->last_dma1_cur_pos = 0;
166 flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
168 fc_pci->active_dma1_addr = 0;
169 flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
172 /* flexcop_dma_config_packet_count(fc,FC_DMA_1,0xc0);
173 flexcop_dma_control_packet_irq(fc,FC_DMA_1,1); */
175 deb_irq("irqs enabled\n");
177 if (fc_pci->fc_dev->pid_filtering)
178 flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
180 flexcop_dma_control_size_irq(fc,FC_DMA_1,0);
182 // flexcop_dma_control_packet_irq(fc,FC_DMA_1,0);
183 deb_irq("irqs disabled\n");
189 static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
192 if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
195 if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0)
198 flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
199 flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
201 fc_pci->init_state |= FC_PCI_DMA_INIT;
204 flexcop_dma_free(&fc_pci->dma[0]);
210 static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
212 if (fc_pci->init_state & FC_PCI_DMA_INIT) {
213 flexcop_dma_free(&fc_pci->dma[0]);
214 flexcop_dma_free(&fc_pci->dma[1]);
216 fc_pci->init_state &= ~FC_PCI_DMA_INIT;
219 static int flexcop_pci_init(struct flexcop_pci *fc_pci)
224 pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev);
225 info("card revision %x", card_rev);
227 if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
230 pci_set_master(fc_pci->pdev);
232 /* enable interrupts */
233 // pci_write_config_dword(pdev, 0x6c, 0x8000);
235 if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
236 goto err_pci_disable_device;
238 fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);
240 if (!fc_pci->io_mem) {
241 err("cannot map io memory\n");
243 goto err_pci_release_regions;
246 pci_set_drvdata(fc_pci->pdev, fc_pci);
248 if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_irq,
249 SA_SHIRQ, DRIVER_NAME, fc_pci)) != 0)
250 goto err_pci_iounmap;
252 spin_lock_init(&fc_pci->irq_lock);
254 fc_pci->init_state |= FC_PCI_INIT;
258 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
259 pci_set_drvdata(fc_pci->pdev, NULL);
260 err_pci_release_regions:
261 pci_release_regions(fc_pci->pdev);
262 err_pci_disable_device:
263 pci_disable_device(fc_pci->pdev);
269 static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
271 if (fc_pci->init_state & FC_PCI_INIT) {
272 free_irq(fc_pci->pdev->irq, fc_pci);
273 pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
274 pci_set_drvdata(fc_pci->pdev, NULL);
275 pci_release_regions(fc_pci->pdev);
276 pci_disable_device(fc_pci->pdev);
278 fc_pci->init_state &= ~FC_PCI_INIT;
282 static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
284 struct flexcop_device *fc;
285 struct flexcop_pci *fc_pci;
288 if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
289 err("out of memory\n");
293 /* general flexcop init */
294 fc_pci = fc->bus_specific;
297 fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
298 fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
299 fc->i2c_request = flexcop_i2c_request;
300 fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
302 fc->stream_control = flexcop_pci_stream_control;
304 fc->pid_filtering = enable_pid_filtering;
305 fc->bus_type = FC_PCI;
307 fc->dev = &pdev->dev;
309 /* bus specific part */
311 if ((ret = flexcop_pci_init(fc_pci)) != 0)
315 if ((ret = flexcop_device_initialize(fc)) != 0)
319 if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
324 flexcop_device_exit(fc);
326 flexcop_pci_exit(fc_pci);
328 flexcop_device_kfree(fc);
333 /* in theory every _exit function should be called exactly two times,
334 * here and in the bail-out-part of the _init-function
336 static void flexcop_pci_remove(struct pci_dev *pdev)
338 struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
340 flexcop_pci_dma_exit(fc_pci);
341 flexcop_device_exit(fc_pci->fc_dev);
342 flexcop_pci_exit(fc_pci);
343 flexcop_device_kfree(fc_pci->fc_dev);
346 static struct pci_device_id flexcop_pci_tbl[] = {
347 { PCI_DEVICE(0x13d0, 0x2103) },
348 /* { PCI_DEVICE(0x13d0, 0x2200) }, PCI FlexCopIII ? */
352 MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
354 static struct pci_driver flexcop_pci_driver = {
355 .name = "Technisat/B2C2 FlexCop II/IIb/III PCI",
356 .id_table = flexcop_pci_tbl,
357 .probe = flexcop_pci_probe,
358 .remove = flexcop_pci_remove,
361 static int __init flexcop_pci_module_init(void)
363 return pci_register_driver(&flexcop_pci_driver);
366 static void __exit flexcop_pci_module_exit(void)
368 pci_unregister_driver(&flexcop_pci_driver);
371 module_init(flexcop_pci_module_init);
372 module_exit(flexcop_pci_module_exit);
374 MODULE_AUTHOR(DRIVER_AUTHOR);
375 MODULE_DESCRIPTION(DRIVER_NAME);
376 MODULE_LICENSE("GPL");