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309 lines
8.5 KiB
309 lines
8.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* cx18 I2C functions |
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* |
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* Derived from ivtv-i2c.c |
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* |
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* Copyright (C) 2007 Hans Verkuil <[email protected]> |
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* Copyright (C) 2008 Andy Walls <[email protected]> |
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*/ |
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#include "cx18-driver.h" |
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#include "cx18-io.h" |
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#include "cx18-cards.h" |
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#include "cx18-gpio.h" |
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#include "cx18-i2c.h" |
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#include "cx18-irq.h" |
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#define CX18_REG_I2C_1_WR 0xf15000 |
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#define CX18_REG_I2C_1_RD 0xf15008 |
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#define CX18_REG_I2C_2_WR 0xf25100 |
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#define CX18_REG_I2C_2_RD 0xf25108 |
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#define SETSCL_BIT 0x0001 |
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#define SETSDL_BIT 0x0002 |
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#define GETSCL_BIT 0x0004 |
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#define GETSDL_BIT 0x0008 |
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#define CX18_CS5345_I2C_ADDR 0x4c |
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#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70 |
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#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71 |
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/* This array should match the CX18_HW_ defines */ |
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static const u8 hw_addrs[] = { |
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0, /* CX18_HW_TUNER */ |
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0, /* CX18_HW_TVEEPROM */ |
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CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ |
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0, /* CX18_HW_DVB */ |
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0, /* CX18_HW_418_AV */ |
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0, /* CX18_HW_GPIO_MUX */ |
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0, /* CX18_HW_GPIO_RESET_CTRL */ |
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CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_HAUP */ |
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}; |
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/* This array should match the CX18_HW_ defines */ |
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/* This might well become a card-specific array */ |
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static const u8 hw_bus[] = { |
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1, /* CX18_HW_TUNER */ |
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0, /* CX18_HW_TVEEPROM */ |
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0, /* CX18_HW_CS5345 */ |
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0, /* CX18_HW_DVB */ |
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0, /* CX18_HW_418_AV */ |
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0, /* CX18_HW_GPIO_MUX */ |
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0, /* CX18_HW_GPIO_RESET_CTRL */ |
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0, /* CX18_HW_Z8F0811_IR_HAUP */ |
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}; |
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/* This array should match the CX18_HW_ defines */ |
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static const char * const hw_devicenames[] = { |
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"tuner", |
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"tveeprom", |
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"cs5345", |
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"cx23418_DTV", |
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"cx23418_AV", |
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"gpio_mux", |
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"gpio_reset_ctrl", |
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"ir_z8f0811_haup", |
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}; |
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static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, |
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const char *type, u8 addr) |
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{ |
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struct i2c_board_info info; |
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struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; |
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unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; |
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memset(&info, 0, sizeof(struct i2c_board_info)); |
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strscpy(info.type, type, I2C_NAME_SIZE); |
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/* Our default information for ir-kbd-i2c.c to use */ |
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switch (hw) { |
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case CX18_HW_Z8F0811_IR_HAUP: |
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init_data->ir_codes = RC_MAP_HAUPPAUGE; |
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init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; |
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init_data->type = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | |
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RC_PROTO_BIT_RC6_6A_32; |
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init_data->name = cx->card_name; |
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info.platform_data = init_data; |
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break; |
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} |
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return IS_ERR(i2c_new_scanned_device(adap, &info, addr_list, NULL)) ? |
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-1 : 0; |
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} |
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int cx18_i2c_register(struct cx18 *cx, unsigned idx) |
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{ |
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struct v4l2_subdev *sd; |
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int bus = hw_bus[idx]; |
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struct i2c_adapter *adap = &cx->i2c_adap[bus]; |
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const char *type = hw_devicenames[idx]; |
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u32 hw = 1 << idx; |
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if (hw == CX18_HW_TUNER) { |
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/* special tuner group handling */ |
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sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, |
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adap, type, 0, cx->card_i2c->radio); |
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if (sd != NULL) |
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sd->grp_id = hw; |
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sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, |
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adap, type, 0, cx->card_i2c->demod); |
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if (sd != NULL) |
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sd->grp_id = hw; |
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sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, |
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adap, type, 0, cx->card_i2c->tv); |
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if (sd != NULL) |
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sd->grp_id = hw; |
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return sd != NULL ? 0 : -1; |
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} |
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if (hw == CX18_HW_Z8F0811_IR_HAUP) |
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return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); |
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/* Is it not an I2C device or one we do not wish to register? */ |
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if (!hw_addrs[idx]) |
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return -1; |
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/* It's an I2C device other than an analog tuner or IR chip */ |
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sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], |
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NULL); |
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if (sd != NULL) |
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sd->grp_id = hw; |
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return sd != NULL ? 0 : -1; |
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} |
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/* Find the first member of the subdev group id in hw */ |
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struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) |
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{ |
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struct v4l2_subdev *result = NULL; |
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struct v4l2_subdev *sd; |
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spin_lock(&cx->v4l2_dev.lock); |
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v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { |
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if (sd->grp_id == hw) { |
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result = sd; |
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break; |
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} |
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} |
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spin_unlock(&cx->v4l2_dev.lock); |
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return result; |
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} |
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static void cx18_setscl(void *data, int state) |
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{ |
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
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u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; |
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u32 r = cx18_read_reg(cx, addr); |
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if (state) |
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cx18_write_reg(cx, r | SETSCL_BIT, addr); |
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else |
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cx18_write_reg(cx, r & ~SETSCL_BIT, addr); |
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} |
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static void cx18_setsda(void *data, int state) |
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{ |
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
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u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; |
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u32 r = cx18_read_reg(cx, addr); |
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if (state) |
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cx18_write_reg(cx, r | SETSDL_BIT, addr); |
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else |
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cx18_write_reg(cx, r & ~SETSDL_BIT, addr); |
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} |
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static int cx18_getscl(void *data) |
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{ |
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
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u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; |
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return cx18_read_reg(cx, addr) & GETSCL_BIT; |
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} |
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static int cx18_getsda(void *data) |
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{ |
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struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; |
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int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; |
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u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; |
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return cx18_read_reg(cx, addr) & GETSDL_BIT; |
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} |
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/* template for i2c-bit-algo */ |
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static const struct i2c_adapter cx18_i2c_adap_template = { |
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.name = "cx18 i2c driver", |
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.algo = NULL, /* set by i2c-algo-bit */ |
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.algo_data = NULL, /* filled from template */ |
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.owner = THIS_MODULE, |
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}; |
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#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ |
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#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ |
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static const struct i2c_algo_bit_data cx18_i2c_algo_template = { |
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.setsda = cx18_setsda, |
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.setscl = cx18_setscl, |
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.getsda = cx18_getsda, |
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.getscl = cx18_getscl, |
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.udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ |
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.timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ |
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}; |
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/* init + register i2c adapter */ |
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int init_cx18_i2c(struct cx18 *cx) |
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{ |
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int i, err; |
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CX18_DEBUG_I2C("i2c init\n"); |
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for (i = 0; i < 2; i++) { |
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/* Setup algorithm for adapter */ |
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cx->i2c_algo[i] = cx18_i2c_algo_template; |
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cx->i2c_algo_cb_data[i].cx = cx; |
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cx->i2c_algo_cb_data[i].bus_index = i; |
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cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; |
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/* Setup adapter */ |
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cx->i2c_adap[i] = cx18_i2c_adap_template; |
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cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; |
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sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), |
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" #%d-%d", cx->instance, i); |
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i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); |
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cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; |
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} |
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if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { |
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/* Reset/Unreset I2C hardware block */ |
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/* Clock select 220MHz */ |
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cx18_write_reg_expect(cx, 0x10000000, 0xc71004, |
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0x00000000, 0x10001000); |
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/* Clock Enable */ |
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cx18_write_reg_expect(cx, 0x10001000, 0xc71024, |
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0x00001000, 0x10001000); |
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} |
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/* courtesy of Steven Toth <[email protected]> */ |
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cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
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mdelay(10); |
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cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); |
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mdelay(10); |
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cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); |
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mdelay(10); |
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/* Set to edge-triggered intrs. */ |
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cx18_write_reg(cx, 0x00c00000, 0xc730c8); |
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/* Clear any stale intrs */ |
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cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, |
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~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); |
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/* Hw I2C1 Clock Freq ~100kHz */ |
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cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); |
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cx18_setscl(&cx->i2c_algo_cb_data[0], 1); |
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cx18_setsda(&cx->i2c_algo_cb_data[0], 1); |
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/* Hw I2C2 Clock Freq ~100kHz */ |
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cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); |
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cx18_setscl(&cx->i2c_algo_cb_data[1], 1); |
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cx18_setsda(&cx->i2c_algo_cb_data[1], 1); |
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cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, |
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core, reset, (u32) CX18_GPIO_RESET_I2C); |
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err = i2c_bit_add_bus(&cx->i2c_adap[0]); |
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if (err) |
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goto err; |
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err = i2c_bit_add_bus(&cx->i2c_adap[1]); |
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if (err) |
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goto err_del_bus_0; |
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return 0; |
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err_del_bus_0: |
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i2c_del_adapter(&cx->i2c_adap[0]); |
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err: |
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return err; |
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} |
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void exit_cx18_i2c(struct cx18 *cx) |
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{ |
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int i; |
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CX18_DEBUG_I2C("i2c exit\n"); |
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cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, |
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CX18_REG_I2C_1_WR); |
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cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, |
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CX18_REG_I2C_2_WR); |
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for (i = 0; i < 2; i++) { |
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i2c_del_adapter(&cx->i2c_adap[i]); |
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} |
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} |
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/* |
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Hauppauge HVR1600 should have: |
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32 cx24227 |
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98 unknown |
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a0 eeprom |
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c2 tuner |
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e? zilog ir |
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*/
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