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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * cx18 I2C functions4 *5 * Derived from ivtv-i2c.c6 *7 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>8 * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net>9 */10 11#include "cx18-driver.h"12#include "cx18-io.h"13#include "cx18-cards.h"14#include "cx18-gpio.h"15#include "cx18-i2c.h"16#include "cx18-irq.h"17 18#define CX18_REG_I2C_1_WR 0xf1500019#define CX18_REG_I2C_1_RD 0xf1500820#define CX18_REG_I2C_2_WR 0xf2510021#define CX18_REG_I2C_2_RD 0xf2510822 23#define SETSCL_BIT 0x000124#define SETSDL_BIT 0x000225#define GETSCL_BIT 0x000426#define GETSDL_BIT 0x000827 28#define CX18_CS5345_I2C_ADDR 0x4c29#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x7030#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x7131 32/* This array should match the CX18_HW_ defines */33static const u8 hw_addrs[] = {34 0, /* CX18_HW_TUNER */35 0, /* CX18_HW_TVEEPROM */36 CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */37 0, /* CX18_HW_DVB */38 0, /* CX18_HW_418_AV */39 0, /* CX18_HW_GPIO_MUX */40 0, /* CX18_HW_GPIO_RESET_CTRL */41 CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_HAUP */42};43 44/* This array should match the CX18_HW_ defines */45/* This might well become a card-specific array */46static const u8 hw_bus[] = {47 1, /* CX18_HW_TUNER */48 0, /* CX18_HW_TVEEPROM */49 0, /* CX18_HW_CS5345 */50 0, /* CX18_HW_DVB */51 0, /* CX18_HW_418_AV */52 0, /* CX18_HW_GPIO_MUX */53 0, /* CX18_HW_GPIO_RESET_CTRL */54 0, /* CX18_HW_Z8F0811_IR_HAUP */55};56 57/* This array should match the CX18_HW_ defines */58static const char * const hw_devicenames[] = {59 "tuner",60 "tveeprom",61 "cs5345",62 "cx23418_DTV",63 "cx23418_AV",64 "gpio_mux",65 "gpio_reset_ctrl",66 "ir_z8f0811_haup",67};68 69static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw,70 const char *type, u8 addr)71{72 struct i2c_board_info info;73 struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data;74 unsigned short addr_list[2] = { addr, I2C_CLIENT_END };75 76 memset(&info, 0, sizeof(struct i2c_board_info));77 strscpy(info.type, type, I2C_NAME_SIZE);78 79 /* Our default information for ir-kbd-i2c.c to use */80 switch (hw) {81 case CX18_HW_Z8F0811_IR_HAUP:82 init_data->ir_codes = RC_MAP_HAUPPAUGE;83 init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR;84 init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE |85 RC_PROTO_BIT_RC6_6A_32;86 init_data->name = cx->card_name;87 info.platform_data = init_data;88 break;89 }90 91 return IS_ERR(i2c_new_scanned_device(adap, &info, addr_list, NULL)) ?92 -1 : 0;93}94 95int cx18_i2c_register(struct cx18 *cx, unsigned idx)96{97 struct v4l2_subdev *sd;98 int bus = hw_bus[idx];99 struct i2c_adapter *adap = &cx->i2c_adap[bus];100 const char *type = hw_devicenames[idx];101 u32 hw = 1 << idx;102 103 if (hw == CX18_HW_TUNER) {104 /* special tuner group handling */105 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,106 adap, type, 0, cx->card_i2c->radio);107 if (sd != NULL)108 sd->grp_id = hw;109 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,110 adap, type, 0, cx->card_i2c->demod);111 if (sd != NULL)112 sd->grp_id = hw;113 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev,114 adap, type, 0, cx->card_i2c->tv);115 if (sd != NULL)116 sd->grp_id = hw;117 return sd != NULL ? 0 : -1;118 }119 120 if (hw == CX18_HW_Z8F0811_IR_HAUP)121 return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]);122 123 /* Is it not an I2C device or one we do not wish to register? */124 if (!hw_addrs[idx])125 return -1;126 127 /* It's an I2C device other than an analog tuner or IR chip */128 sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx],129 NULL);130 if (sd != NULL)131 sd->grp_id = hw;132 return sd != NULL ? 0 : -1;133}134 135/* Find the first member of the subdev group id in hw */136struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw)137{138 struct v4l2_subdev *result = NULL;139 struct v4l2_subdev *sd;140 141 spin_lock(&cx->v4l2_dev.lock);142 v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) {143 if (sd->grp_id == hw) {144 result = sd;145 break;146 }147 }148 spin_unlock(&cx->v4l2_dev.lock);149 return result;150}151 152static void cx18_setscl(void *data, int state)153{154 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;155 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;156 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;157 u32 r = cx18_read_reg(cx, addr);158 159 if (state)160 cx18_write_reg(cx, r | SETSCL_BIT, addr);161 else162 cx18_write_reg(cx, r & ~SETSCL_BIT, addr);163}164 165static void cx18_setsda(void *data, int state)166{167 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;168 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;169 u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR;170 u32 r = cx18_read_reg(cx, addr);171 172 if (state)173 cx18_write_reg(cx, r | SETSDL_BIT, addr);174 else175 cx18_write_reg(cx, r & ~SETSDL_BIT, addr);176}177 178static int cx18_getscl(void *data)179{180 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;181 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;182 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;183 184 return cx18_read_reg(cx, addr) & GETSCL_BIT;185}186 187static int cx18_getsda(void *data)188{189 struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx;190 int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index;191 u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD;192 193 return cx18_read_reg(cx, addr) & GETSDL_BIT;194}195 196/* template for i2c-bit-algo */197static const struct i2c_adapter cx18_i2c_adap_template = {198 .name = "cx18 i2c driver",199 .algo = NULL, /* set by i2c-algo-bit */200 .algo_data = NULL, /* filled from template */201 .owner = THIS_MODULE,202};203 204#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */205#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */206 207static const struct i2c_algo_bit_data cx18_i2c_algo_template = {208 .setsda = cx18_setsda,209 .setscl = cx18_setscl,210 .getsda = cx18_getsda,211 .getscl = cx18_getscl,212 .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/213 .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */214};215 216/* init + register i2c adapter */217int init_cx18_i2c(struct cx18 *cx)218{219 int i, err;220 CX18_DEBUG_I2C("i2c init\n");221 222 for (i = 0; i < 2; i++) {223 /* Setup algorithm for adapter */224 cx->i2c_algo[i] = cx18_i2c_algo_template;225 cx->i2c_algo_cb_data[i].cx = cx;226 cx->i2c_algo_cb_data[i].bus_index = i;227 cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i];228 229 /* Setup adapter */230 cx->i2c_adap[i] = cx18_i2c_adap_template;231 cx->i2c_adap[i].algo_data = &cx->i2c_algo[i];232 sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name),233 " #%d-%d", cx->instance, i);234 i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev);235 cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev;236 }237 238 if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) {239 /* Reset/Unreset I2C hardware block */240 /* Clock select 220MHz */241 cx18_write_reg_expect(cx, 0x10000000, 0xc71004,242 0x00000000, 0x10001000);243 /* Clock Enable */244 cx18_write_reg_expect(cx, 0x10001000, 0xc71024,245 0x00001000, 0x10001000);246 }247 /* courtesy of Steven Toth <stoth@hauppauge.com> */248 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);249 mdelay(10);250 cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0);251 mdelay(10);252 cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0);253 mdelay(10);254 255 /* Set to edge-triggered intrs. */256 cx18_write_reg(cx, 0x00c00000, 0xc730c8);257 /* Clear any stale intrs */258 cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS,259 ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT);260 261 /* Hw I2C1 Clock Freq ~100kHz */262 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR);263 cx18_setscl(&cx->i2c_algo_cb_data[0], 1);264 cx18_setsda(&cx->i2c_algo_cb_data[0], 1);265 266 /* Hw I2C2 Clock Freq ~100kHz */267 cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR);268 cx18_setscl(&cx->i2c_algo_cb_data[1], 1);269 cx18_setsda(&cx->i2c_algo_cb_data[1], 1);270 271 cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL,272 core, reset, (u32) CX18_GPIO_RESET_I2C);273 274 err = i2c_bit_add_bus(&cx->i2c_adap[0]);275 if (err)276 goto err;277 err = i2c_bit_add_bus(&cx->i2c_adap[1]);278 if (err)279 goto err_del_bus_0;280 return 0;281 282 err_del_bus_0:283 i2c_del_adapter(&cx->i2c_adap[0]);284 err:285 return err;286}287 288void exit_cx18_i2c(struct cx18 *cx)289{290 int i;291 CX18_DEBUG_I2C("i2c exit\n");292 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4,293 CX18_REG_I2C_1_WR);294 cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4,295 CX18_REG_I2C_2_WR);296 297 for (i = 0; i < 2; i++) {298 i2c_del_adapter(&cx->i2c_adap[i]);299 }300}301 302/*303 Hauppauge HVR1600 should have:304 32 cx24227305 98 unknown306 a0 eeprom307 c2 tuner308 e? zilog ir309 */310