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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver4 *5 * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>6 *7 * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual8 * DVB-S2 CI card (cimax2) with following copyrights:9 *10 * Copyright (C) 2009 NetUP Inc.11 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>12 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>13 */14 15#include "sp2_priv.h"16 17static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)18{19 int ret;20 struct i2c_client *client = s->client;21 struct i2c_adapter *adap = client->adapter;22 struct i2c_msg msg[] = {23 {24 .addr = client->addr,25 .flags = 0,26 .buf = ®,27 .len = 128 }, {29 .addr = client->addr,30 .flags = I2C_M_RD,31 .buf = buf,32 .len = len33 }34 };35 36 ret = i2c_transfer(adap, msg, 2);37 38 if (ret != 2) {39 dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",40 reg, ret);41 if (ret < 0)42 return ret;43 else44 return -EIO;45 }46 47 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",48 client->addr, reg, buf[0]);49 50 return 0;51}52 53static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)54{55 int ret;56 u8 buffer[35];57 struct i2c_client *client = s->client;58 struct i2c_adapter *adap = client->adapter;59 struct i2c_msg msg = {60 .addr = client->addr,61 .flags = 0,62 .buf = &buffer[0],63 .len = len + 164 };65 66 if ((len + 1) > sizeof(buffer)) {67 dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",68 reg, len);69 return -EINVAL;70 }71 72 buffer[0] = reg;73 memcpy(&buffer[1], buf, len);74 75 ret = i2c_transfer(adap, &msg, 1);76 77 if (ret != 1) {78 dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",79 reg, ret);80 if (ret < 0)81 return ret;82 else83 return -EIO;84 }85 86 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",87 client->addr, reg, len, buf);88 89 return 0;90}91 92static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,93 u8 read, int addr, u8 data)94{95 struct sp2 *s = en50221->data;96 u8 store;97 int mem, ret;98 int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;99 100 if (slot != 0)101 return -EINVAL;102 103 /*104 * change module access type between IO space and attribute memory105 * when needed106 */107 if (s->module_access_type != acs) {108 ret = sp2_read_i2c(s, 0x00, &store, 1);109 110 if (ret)111 return ret;112 113 store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);114 store |= acs;115 116 ret = sp2_write_i2c(s, 0x00, &store, 1);117 if (ret)118 return ret;119 }120 121 s->module_access_type = acs;122 123 /* implementation of ci_op_cam is device specific */124 if (ci_op_cam) {125 ret = ci_op_cam(s->priv, read, addr, data, &mem);126 } else {127 dev_err(&s->client->dev, "callback not defined");128 return -EINVAL;129 }130 131 if (ret)132 return ret;133 134 dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",135 (read) ? "read" : "write", slot, addr,136 (acs == SP2_CI_ATTR_ACS) ? "attr" : "io",137 (read) ? mem : data);138 139 if (read)140 return mem;141 else142 return 0;143 144}145 146int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,147 int slot, int addr)148{149 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,150 SP2_CI_RD, addr, 0);151}152 153int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,154 int slot, int addr, u8 data)155{156 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,157 SP2_CI_WR, addr, data);158}159 160int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,161 int slot, u8 addr)162{163 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,164 SP2_CI_RD, addr, 0);165}166 167int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,168 int slot, u8 addr, u8 data)169{170 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,171 SP2_CI_WR, addr, data);172}173 174int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)175{176 struct sp2 *s = en50221->data;177 u8 buf;178 int ret;179 180 dev_dbg(&s->client->dev, "slot: %d\n", slot);181 182 if (slot != 0)183 return -EINVAL;184 185 /* RST on */186 buf = SP2_MOD_CTL_RST;187 ret = sp2_write_i2c(s, 0x00, &buf, 1);188 189 if (ret)190 return ret;191 192 usleep_range(500, 600);193 194 /* RST off */195 buf = 0x00;196 ret = sp2_write_i2c(s, 0x00, &buf, 1);197 198 if (ret)199 return ret;200 201 msleep(1000);202 203 return 0;204}205 206int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)207{208 struct sp2 *s = en50221->data;209 210 dev_dbg(&s->client->dev, "slot:%d\n", slot);211 212 /* not implemented */213 return 0;214}215 216int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)217{218 struct sp2 *s = en50221->data;219 u8 buf;220 221 dev_dbg(&s->client->dev, "slot:%d\n", slot);222 223 if (slot != 0)224 return -EINVAL;225 226 sp2_read_i2c(s, 0x00, &buf, 1);227 228 /* disable bypass and enable TS */229 buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);230 return sp2_write_i2c(s, 0, &buf, 1);231}232 233int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,234 int slot, int open)235{236 struct sp2 *s = en50221->data;237 u8 buf[2];238 int ret;239 240 dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);241 242 /*243 * CAM module INSERT/REMOVE processing. Slow operation because of i2c244 * transfers. Throttle read to one per sec.245 */246 if (time_after(jiffies, s->next_status_checked_time)) {247 ret = sp2_read_i2c(s, 0x00, buf, 1);248 s->next_status_checked_time = jiffies + msecs_to_jiffies(1000);249 250 if (ret)251 return 0;252 253 if (buf[0] & SP2_MOD_CTL_DET)254 s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |255 DVB_CA_EN50221_POLL_CAM_READY;256 else257 s->status = 0;258 }259 260 return s->status;261}262 263static int sp2_init(struct sp2 *s)264{265 int ret = 0;266 u8 buf;267 u8 cimax_init[34] = {268 0x00, /* module A control*/269 0x00, /* auto select mask high A */270 0x00, /* auto select mask low A */271 0x00, /* auto select pattern high A */272 0x00, /* auto select pattern low A */273 0x44, /* memory access time A, 600 ns */274 0x00, /* invert input A */275 0x00, /* RFU */276 0x00, /* RFU */277 0x00, /* module B control*/278 0x00, /* auto select mask high B */279 0x00, /* auto select mask low B */280 0x00, /* auto select pattern high B */281 0x00, /* auto select pattern low B */282 0x44, /* memory access time B, 600 ns */283 0x00, /* invert input B */284 0x00, /* RFU */285 0x00, /* RFU */286 0x00, /* auto select mask high Ext */287 0x00, /* auto select mask low Ext */288 0x00, /* auto select pattern high Ext */289 0x00, /* auto select pattern low Ext */290 0x00, /* RFU */291 0x02, /* destination - module A */292 0x01, /* power control reg, VCC power on */293 0x00, /* RFU */294 0x00, /* int status read only */295 0x00, /* Interrupt Mask Register */296 0x05, /* EXTINT=active-high, INT=push-pull */297 0x00, /* USCG1 */298 0x04, /* ack active low */299 0x00, /* LOCK = 0 */300 0x22, /* unknown */301 0x00, /* synchronization? */302 };303 304 dev_dbg(&s->client->dev, "\n");305 306 s->ca.owner = THIS_MODULE;307 s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;308 s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;309 s->ca.read_cam_control = sp2_ci_read_cam_control;310 s->ca.write_cam_control = sp2_ci_write_cam_control;311 s->ca.slot_reset = sp2_ci_slot_reset;312 s->ca.slot_shutdown = sp2_ci_slot_shutdown;313 s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;314 s->ca.poll_slot_status = sp2_ci_poll_slot_status;315 s->ca.data = s;316 s->module_access_type = 0;317 318 /* initialize all regs */319 ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);320 if (ret)321 goto err;322 323 /* lock registers */324 buf = 1;325 ret = sp2_write_i2c(s, 0x1f, &buf, 1);326 if (ret)327 goto err;328 329 /* power on slots */330 ret = sp2_write_i2c(s, 0x18, &buf, 1);331 if (ret)332 goto err;333 334 ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);335 if (ret)336 goto err;337 338 return 0;339 340err:341 dev_dbg(&s->client->dev, "init failed=%d\n", ret);342 return ret;343}344 345static int sp2_exit(struct i2c_client *client)346{347 struct sp2 *s;348 349 dev_dbg(&client->dev, "\n");350 351 if (!client)352 return 0;353 354 s = i2c_get_clientdata(client);355 if (!s)356 return 0;357 358 if (!s->ca.data)359 return 0;360 361 dvb_ca_en50221_release(&s->ca);362 363 return 0;364}365 366static int sp2_probe(struct i2c_client *client)367{368 struct sp2_config *cfg = client->dev.platform_data;369 struct sp2 *s;370 int ret;371 372 dev_dbg(&client->dev, "\n");373 374 s = kzalloc(sizeof(*s), GFP_KERNEL);375 if (!s) {376 ret = -ENOMEM;377 goto err;378 }379 380 s->client = client;381 s->dvb_adap = cfg->dvb_adap;382 s->priv = cfg->priv;383 s->ci_control = cfg->ci_control;384 385 i2c_set_clientdata(client, s);386 387 ret = sp2_init(s);388 if (ret)389 goto err;390 391 dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");392 return 0;393err:394 dev_dbg(&client->dev, "init failed=%d\n", ret);395 kfree(s);396 397 return ret;398}399 400static void sp2_remove(struct i2c_client *client)401{402 struct sp2 *s = i2c_get_clientdata(client);403 404 dev_dbg(&client->dev, "\n");405 sp2_exit(client);406 kfree(s);407}408 409static const struct i2c_device_id sp2_id[] = {410 { "sp2" },411 {}412};413MODULE_DEVICE_TABLE(i2c, sp2_id);414 415static struct i2c_driver sp2_driver = {416 .driver = {417 .name = "sp2",418 },419 .probe = sp2_probe,420 .remove = sp2_remove,421 .id_table = sp2_id,422};423 424module_i2c_driver(sp2_driver);425 426MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");427MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");428MODULE_LICENSE("GPL");429