1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * CIMax2(R) SP2 driver in conjunction with NetUp Dual DVB-S2 CI card
7 * Copyright (C) 2009 NetUP Inc.
8 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
9 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
14 #include <media/dvb_ca_en50221.h>
16 /* Max transfer size done by I2C transfer functions */
17 #define MAX_XFER_SIZE 64
19 /**** Bit definitions for MC417_RWD and MC417_OEN registers ***
24 bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8
25 +-------+-------+-------+-------+-------+-------+-------+-------+
26 | WR# | RD# | | ACK# | ADHI | ADLO | CS1# | CS0# |
27 +-------+-------+-------+-------+-------+-------+-------+-------+
28 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
29 +-------+-------+-------+-------+-------+-------+-------+-------+
30 | DATA7| DATA6| DATA5| DATA4| DATA3| DATA2| DATA1| DATA0|
31 +-------+-------+-------+-------+-------+-------+-------+-------+
34 #define NETUP_DATA 0x000000ff
35 #define NETUP_WR 0x00008000
36 #define NETUP_RD 0x00004000
37 #define NETUP_ACK 0x00001000
38 #define NETUP_ADHI 0x00000800
39 #define NETUP_ADLO 0x00000400
40 #define NETUP_CS1 0x00000200
41 #define NETUP_CS0 0x00000100
42 #define NETUP_EN_ALL 0x00001000
43 #define NETUP_CTRL_OFF (NETUP_CS1 | NETUP_CS0 | NETUP_WR | NETUP_RD)
44 #define NETUP_CI_CTL 0x04
47 #define NETUP_IRQ_DETAM 0x1
48 #define NETUP_IRQ_IRQAM 0x4
50 static unsigned int ci_dbg;
51 module_param(ci_dbg, int, 0644);
52 MODULE_PARM_DESC(ci_dbg, "Enable CI debugging");
54 static unsigned int ci_irq_enable;
55 module_param(ci_irq_enable, int, 0644);
56 MODULE_PARM_DESC(ci_irq_enable, "Enable IRQ from CAM");
58 #define ci_dbg_print(fmt, args...) \
61 printk(KERN_DEBUG pr_fmt("%s: " fmt), \
65 #define ci_irq_flags() (ci_irq_enable ? NETUP_IRQ_IRQAM : 0)
67 /* stores all private variables for communication with CI */
68 struct netup_ci_state {
69 struct dvb_ca_en50221 ca;
70 struct mutex ca_mutex;
71 struct i2c_adapter *i2c_adap;
74 struct work_struct work;
78 unsigned long next_status_checked_time;
82 static int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
86 struct i2c_msg msg[] = {
100 ret = i2c_transfer(i2c_adap, msg, 2);
103 ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n",
109 ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n",
110 __func__, addr, reg, buf[0]);
115 static int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
119 u8 buffer[MAX_XFER_SIZE];
121 struct i2c_msg msg = {
128 if (1 + len > sizeof(buffer)) {
129 pr_warn("%s: i2c wr reg=%04x: len=%d is too big!\n",
130 KBUILD_MODNAME, reg, len);
135 memcpy(&buffer[1], buf, len);
137 ret = i2c_transfer(i2c_adap, &msg, 1);
140 ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n",
148 static int netup_ci_get_mem(struct cx23885_dev *dev)
151 unsigned long timeout = jiffies + msecs_to_jiffies(1);
154 mem = cx_read(MC417_RWD);
155 if ((mem & NETUP_ACK) == 0)
157 if (time_after(jiffies, timeout))
162 cx_set(MC417_RWD, NETUP_CTRL_OFF);
167 static int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
168 u8 flag, u8 read, int addr, u8 data)
170 struct netup_ci_state *state = en50221->data;
171 struct cx23885_tsport *port = state->priv;
172 struct cx23885_dev *dev = port->dev;
181 if (state->current_ci_flag != flag) {
182 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
190 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
195 state->current_ci_flag = flag;
197 mutex_lock(&dev->gpio_lock);
200 cx_write(MC417_OEN, NETUP_EN_ALL);
201 cx_write(MC417_RWD, NETUP_CTRL_OFF |
202 NETUP_ADLO | (0xff & addr));
203 cx_clear(MC417_RWD, NETUP_ADLO);
204 cx_write(MC417_RWD, NETUP_CTRL_OFF |
205 NETUP_ADHI | (0xff & (addr >> 8)));
206 cx_clear(MC417_RWD, NETUP_ADHI);
208 if (read) { /* data in */
209 cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA);
210 } else /* data out */
211 cx_write(MC417_RWD, NETUP_CTRL_OFF | data);
215 (state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1);
217 cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR);
218 mem = netup_ci_get_mem(dev);
220 mutex_unlock(&dev->gpio_lock);
226 ci_dbg_print("%s: %s: chipaddr=[0x%x] addr=[0x%02x], %s=%x\n", __func__,
227 (read) ? "read" : "write", state->ci_i2c_addr, addr,
228 (flag == NETUP_CI_CTL) ? "ctl" : "mem",
229 (read) ? mem : data);
237 int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
240 return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0);
243 int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
244 int slot, int addr, u8 data)
246 return netup_ci_op_cam(en50221, slot, 0, 0, addr, data);
249 int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
252 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL,
253 NETUP_CI_RD, addr, 0);
256 int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
259 return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data);
262 int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
264 struct netup_ci_state *state = en50221->data;
272 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
281 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
285 dvb_ca_en50221_camready_irq(&state->ca, 0);
291 int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
293 /* not implemented */
297 static int netup_ci_set_irq(struct dvb_ca_en50221 *en50221, u8 irq_mode)
299 struct netup_ci_state *state = en50221->data;
302 if (irq_mode == state->current_irq_mode)
305 ci_dbg_print("%s: chipaddr=[0x%x] setting ci IRQ to [0x%x] \n",
306 __func__, state->ci_i2c_addr, irq_mode);
307 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
313 state->current_irq_mode = irq_mode;
318 int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot)
320 struct netup_ci_state *state = en50221->data;
326 netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
330 return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
335 static void netup_read_ci_status(struct work_struct *work)
337 struct netup_ci_state *state =
338 container_of(work, struct netup_ci_state, work);
342 /* CAM module IRQ processing. fast operation */
343 dvb_ca_en50221_frda_irq(&state->ca, 0);
345 /* CAM module INSERT/REMOVE processing. slow operation because of i2c
347 if (time_after(jiffies, state->next_status_checked_time)
349 ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
352 state->next_status_checked_time = jiffies
353 + msecs_to_jiffies(1000);
358 ci_dbg_print("%s: Slot Status Addr=[0x%04x], Reg=[0x%02x], data=%02x, TS config = %02x\n",
359 __func__, state->ci_i2c_addr, 0, buf[0], buf[0]);
363 state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
364 DVB_CA_EN50221_POLL_CAM_READY;
371 int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status)
373 struct cx23885_tsport *port = NULL;
374 struct netup_ci_state *state = NULL;
376 ci_dbg_print("%s:\n", __func__);
378 if (0 == (pci_status & (PCI_MSK_GPIO0 | PCI_MSK_GPIO1)))
381 if (pci_status & PCI_MSK_GPIO0) {
383 state = port->port_priv;
384 schedule_work(&state->work);
385 ci_dbg_print("%s: Wakeup CI0\n", __func__);
388 if (pci_status & PCI_MSK_GPIO1) {
390 state = port->port_priv;
391 schedule_work(&state->work);
392 ci_dbg_print("%s: Wakeup CI1\n", __func__);
398 int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221,
401 struct netup_ci_state *state = en50221->data;
406 netup_ci_set_irq(en50221, open ? (NETUP_IRQ_DETAM | ci_irq_flags())
409 return state->status;
412 int netup_ci_init(struct cx23885_tsport *port)
414 struct netup_ci_state *state;
415 u8 cimax_init[34] = {
416 0x00, /* module A control*/
417 0x00, /* auto select mask high A */
418 0x00, /* auto select mask low A */
419 0x00, /* auto select pattern high A */
420 0x00, /* auto select pattern low A */
421 0x44, /* memory access time A */
422 0x00, /* invert input A */
425 0x00, /* module B control*/
426 0x00, /* auto select mask high B */
427 0x00, /* auto select mask low B */
428 0x00, /* auto select pattern high B */
429 0x00, /* auto select pattern low B */
430 0x44, /* memory access time B */
431 0x00, /* invert input B */
434 0x00, /* auto select mask high Ext */
435 0x00, /* auto select mask low Ext */
436 0x00, /* auto select pattern high Ext */
437 0x00, /* auto select pattern low Ext */
439 0x02, /* destination - module A */
440 0x01, /* power on (use it like store place) */
442 0x00, /* int status read only */
443 ci_irq_flags() | NETUP_IRQ_DETAM, /* DETAM, IRQAM unmasked */
444 0x05, /* EXTINT=active-high, INT=push-pull */
446 0x04, /* ack active low */
448 0x33, /* serial mode, rising in, rising out, MSB first*/
449 0x31, /* synchronization */
453 ci_dbg_print("%s\n", __func__);
454 state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL);
456 ci_dbg_print("%s: Unable create CI structure!\n", __func__);
461 port->port_priv = state;
465 state->ci_i2c_addr = 0x40;
468 state->ci_i2c_addr = 0x41;
472 state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap;
473 state->ca.owner = THIS_MODULE;
474 state->ca.read_attribute_mem = netup_ci_read_attribute_mem;
475 state->ca.write_attribute_mem = netup_ci_write_attribute_mem;
476 state->ca.read_cam_control = netup_ci_read_cam_ctl;
477 state->ca.write_cam_control = netup_ci_write_cam_ctl;
478 state->ca.slot_reset = netup_ci_slot_reset;
479 state->ca.slot_shutdown = netup_ci_slot_shutdown;
480 state->ca.slot_ts_enable = netup_ci_slot_ts_ctl;
481 state->ca.poll_slot_status = netup_poll_ci_slot_status;
482 state->ca.data = state;
484 state->current_irq_mode = ci_irq_flags() | NETUP_IRQ_DETAM;
486 ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
487 0, &cimax_init[0], 34);
489 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
490 0x1f, &cimax_init[0x18], 1);
492 ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
493 0x18, &cimax_init[0x18], 1);
498 ret = dvb_ca_en50221_init(&port->frontends.adapter,
505 INIT_WORK(&state->work, netup_read_ci_status);
506 schedule_work(&state->work);
508 ci_dbg_print("%s: CI initialized!\n", __func__);
512 ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret);
517 void netup_ci_exit(struct cx23885_tsport *port)
519 struct netup_ci_state *state;
524 state = (struct netup_ci_state *)port->port_priv;
528 if (NULL == state->ca.data)
531 dvb_ca_en50221_release(&state->ca);