diff options
Diffstat (limited to 'drivers/media/pci/cx18/cx18-i2c.c')
| -rw-r--r-- | drivers/media/pci/cx18/cx18-i2c.c | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/drivers/media/pci/cx18/cx18-i2c.c b/drivers/media/pci/cx18/cx18-i2c.c new file mode 100644 index 0000000..4af8cd6 --- /dev/null +++ b/drivers/media/pci/cx18/cx18-i2c.c @@ -0,0 +1,325 @@ +/* + * cx18 I2C functions + * + * Derived from ivtv-i2c.c + * + * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> + * Copyright (C) 2008 Andy Walls <awalls@md.metrocast.net> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307 USA + */ + +#include "cx18-driver.h" +#include "cx18-io.h" +#include "cx18-cards.h" +#include "cx18-gpio.h" +#include "cx18-i2c.h" +#include "cx18-irq.h" + +#define CX18_REG_I2C_1_WR 0xf15000 +#define CX18_REG_I2C_1_RD 0xf15008 +#define CX18_REG_I2C_2_WR 0xf25100 +#define CX18_REG_I2C_2_RD 0xf25108 + +#define SETSCL_BIT 0x0001 +#define SETSDL_BIT 0x0002 +#define GETSCL_BIT 0x0004 +#define GETSDL_BIT 0x0008 + +#define CX18_CS5345_I2C_ADDR 0x4c +#define CX18_Z8F0811_IR_TX_I2C_ADDR 0x70 +#define CX18_Z8F0811_IR_RX_I2C_ADDR 0x71 + +/* This array should match the CX18_HW_ defines */ +static const u8 hw_addrs[] = { + 0, /* CX18_HW_TUNER */ + 0, /* CX18_HW_TVEEPROM */ + CX18_CS5345_I2C_ADDR, /* CX18_HW_CS5345 */ + 0, /* CX18_HW_DVB */ + 0, /* CX18_HW_418_AV */ + 0, /* CX18_HW_GPIO_MUX */ + 0, /* CX18_HW_GPIO_RESET_CTRL */ + CX18_Z8F0811_IR_TX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_TX_HAUP */ + CX18_Z8F0811_IR_RX_I2C_ADDR, /* CX18_HW_Z8F0811_IR_RX_HAUP */ +}; + +/* This array should match the CX18_HW_ defines */ +/* This might well become a card-specific array */ +static const u8 hw_bus[] = { + 1, /* CX18_HW_TUNER */ + 0, /* CX18_HW_TVEEPROM */ + 0, /* CX18_HW_CS5345 */ + 0, /* CX18_HW_DVB */ + 0, /* CX18_HW_418_AV */ + 0, /* CX18_HW_GPIO_MUX */ + 0, /* CX18_HW_GPIO_RESET_CTRL */ + 0, /* CX18_HW_Z8F0811_IR_TX_HAUP */ + 0, /* CX18_HW_Z8F0811_IR_RX_HAUP */ +}; + +/* This array should match the CX18_HW_ defines */ +static const char * const hw_devicenames[] = { + "tuner", + "tveeprom", + "cs5345", + "cx23418_DTV", + "cx23418_AV", + "gpio_mux", + "gpio_reset_ctrl", + "ir_tx_z8f0811_haup", + "ir_rx_z8f0811_haup", +}; + +static int cx18_i2c_new_ir(struct cx18 *cx, struct i2c_adapter *adap, u32 hw, + const char *type, u8 addr) +{ + struct i2c_board_info info; + struct IR_i2c_init_data *init_data = &cx->ir_i2c_init_data; + unsigned short addr_list[2] = { addr, I2C_CLIENT_END }; + + memset(&info, 0, sizeof(struct i2c_board_info)); + strlcpy(info.type, type, I2C_NAME_SIZE); + + /* Our default information for ir-kbd-i2c.c to use */ + switch (hw) { + case CX18_HW_Z8F0811_IR_RX_HAUP: + init_data->ir_codes = RC_MAP_HAUPPAUGE; + init_data->internal_get_key_func = IR_KBD_GET_KEY_HAUP_XVR; + init_data->type = RC_BIT_RC5; + init_data->name = cx->card_name; + info.platform_data = init_data; + break; + } + + return i2c_new_probed_device(adap, &info, addr_list, NULL) == NULL ? + -1 : 0; +} + +int cx18_i2c_register(struct cx18 *cx, unsigned idx) +{ + struct v4l2_subdev *sd; + int bus = hw_bus[idx]; + struct i2c_adapter *adap = &cx->i2c_adap[bus]; + const char *type = hw_devicenames[idx]; + u32 hw = 1 << idx; + + if (hw == CX18_HW_TUNER) { + /* special tuner group handling */ + sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, + adap, type, 0, cx->card_i2c->radio); + if (sd != NULL) + sd->grp_id = hw; + sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, + adap, type, 0, cx->card_i2c->demod); + if (sd != NULL) + sd->grp_id = hw; + sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, + adap, type, 0, cx->card_i2c->tv); + if (sd != NULL) + sd->grp_id = hw; + return sd != NULL ? 0 : -1; + } + + if (hw & CX18_HW_IR_ANY) + return cx18_i2c_new_ir(cx, adap, hw, type, hw_addrs[idx]); + + /* Is it not an I2C device or one we do not wish to register? */ + if (!hw_addrs[idx]) + return -1; + + /* It's an I2C device other than an analog tuner or IR chip */ + sd = v4l2_i2c_new_subdev(&cx->v4l2_dev, adap, type, hw_addrs[idx], + NULL); + if (sd != NULL) + sd->grp_id = hw; + return sd != NULL ? 0 : -1; +} + +/* Find the first member of the subdev group id in hw */ +struct v4l2_subdev *cx18_find_hw(struct cx18 *cx, u32 hw) +{ + struct v4l2_subdev *result = NULL; + struct v4l2_subdev *sd; + + spin_lock(&cx->v4l2_dev.lock); + v4l2_device_for_each_subdev(sd, &cx->v4l2_dev) { + if (sd->grp_id == hw) { + result = sd; + break; + } + } + spin_unlock(&cx->v4l2_dev.lock); + return result; +} + +static void cx18_setscl(void *data, int state) +{ + struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; + int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; + u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; + u32 r = cx18_read_reg(cx, addr); + + if (state) + cx18_write_reg(cx, r | SETSCL_BIT, addr); + else + cx18_write_reg(cx, r & ~SETSCL_BIT, addr); +} + +static void cx18_setsda(void *data, int state) +{ + struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; + int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; + u32 addr = bus_index ? CX18_REG_I2C_2_WR : CX18_REG_I2C_1_WR; + u32 r = cx18_read_reg(cx, addr); + + if (state) + cx18_write_reg(cx, r | SETSDL_BIT, addr); + else + cx18_write_reg(cx, r & ~SETSDL_BIT, addr); +} + +static int cx18_getscl(void *data) +{ + struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; + int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; + u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; + + return cx18_read_reg(cx, addr) & GETSCL_BIT; +} + +static int cx18_getsda(void *data) +{ + struct cx18 *cx = ((struct cx18_i2c_algo_callback_data *)data)->cx; + int bus_index = ((struct cx18_i2c_algo_callback_data *)data)->bus_index; + u32 addr = bus_index ? CX18_REG_I2C_2_RD : CX18_REG_I2C_1_RD; + + return cx18_read_reg(cx, addr) & GETSDL_BIT; +} + +/* template for i2c-bit-algo */ +static struct i2c_adapter cx18_i2c_adap_template = { + .name = "cx18 i2c driver", + .algo = NULL, /* set by i2c-algo-bit */ + .algo_data = NULL, /* filled from template */ + .owner = THIS_MODULE, +}; + +#define CX18_SCL_PERIOD (10) /* usecs. 10 usec is period for a 100 KHz clock */ +#define CX18_ALGO_BIT_TIMEOUT (2) /* seconds */ + +static struct i2c_algo_bit_data cx18_i2c_algo_template = { + .setsda = cx18_setsda, + .setscl = cx18_setscl, + .getsda = cx18_getsda, + .getscl = cx18_getscl, + .udelay = CX18_SCL_PERIOD/2, /* 1/2 clock period in usec*/ + .timeout = CX18_ALGO_BIT_TIMEOUT*HZ /* jiffies */ +}; + +/* init + register i2c adapter */ +int init_cx18_i2c(struct cx18 *cx) +{ + int i, err; + CX18_DEBUG_I2C("i2c init\n"); + + for (i = 0; i < 2; i++) { + /* Setup algorithm for adapter */ + cx->i2c_algo[i] = cx18_i2c_algo_template; + cx->i2c_algo_cb_data[i].cx = cx; + cx->i2c_algo_cb_data[i].bus_index = i; + cx->i2c_algo[i].data = &cx->i2c_algo_cb_data[i]; + + /* Setup adapter */ + cx->i2c_adap[i] = cx18_i2c_adap_template; + cx->i2c_adap[i].algo_data = &cx->i2c_algo[i]; + sprintf(cx->i2c_adap[i].name + strlen(cx->i2c_adap[i].name), + " #%d-%d", cx->instance, i); + i2c_set_adapdata(&cx->i2c_adap[i], &cx->v4l2_dev); + cx->i2c_adap[i].dev.parent = &cx->pci_dev->dev; + } + + if (cx18_read_reg(cx, CX18_REG_I2C_2_WR) != 0x0003c02f) { + /* Reset/Unreset I2C hardware block */ + /* Clock select 220MHz */ + cx18_write_reg_expect(cx, 0x10000000, 0xc71004, + 0x00000000, 0x10001000); + /* Clock Enable */ + cx18_write_reg_expect(cx, 0x10001000, 0xc71024, + 0x00001000, 0x10001000); + } + /* courtesy of Steven Toth <stoth@hauppauge.com> */ + cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); + mdelay(10); + cx18_write_reg_expect(cx, 0x00c000c0, 0xc7001c, 0x000000c0, 0x00c000c0); + mdelay(10); + cx18_write_reg_expect(cx, 0x00c00000, 0xc7001c, 0x00000000, 0x00c000c0); + mdelay(10); + + /* Set to edge-triggered intrs. */ + cx18_write_reg(cx, 0x00c00000, 0xc730c8); + /* Clear any stale intrs */ + cx18_write_reg_expect(cx, HW2_I2C1_INT|HW2_I2C2_INT, HW2_INT_CLR_STATUS, + ~(HW2_I2C1_INT|HW2_I2C2_INT), HW2_I2C1_INT|HW2_I2C2_INT); + + /* Hw I2C1 Clock Freq ~100kHz */ + cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_1_WR); + cx18_setscl(&cx->i2c_algo_cb_data[0], 1); + cx18_setsda(&cx->i2c_algo_cb_data[0], 1); + + /* Hw I2C2 Clock Freq ~100kHz */ + cx18_write_reg(cx, 0x00021c0f & ~4, CX18_REG_I2C_2_WR); + cx18_setscl(&cx->i2c_algo_cb_data[1], 1); + cx18_setsda(&cx->i2c_algo_cb_data[1], 1); + + cx18_call_hw(cx, CX18_HW_GPIO_RESET_CTRL, + core, reset, (u32) CX18_GPIO_RESET_I2C); + + err = i2c_bit_add_bus(&cx->i2c_adap[0]); + if (err) + goto err; + err = i2c_bit_add_bus(&cx->i2c_adap[1]); + if (err) + goto err_del_bus_0; + return 0; + + err_del_bus_0: + i2c_del_adapter(&cx->i2c_adap[0]); + err: + return err; +} + +void exit_cx18_i2c(struct cx18 *cx) +{ + int i; + CX18_DEBUG_I2C("i2c exit\n"); + cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_1_WR) | 4, + CX18_REG_I2C_1_WR); + cx18_write_reg(cx, cx18_read_reg(cx, CX18_REG_I2C_2_WR) | 4, + CX18_REG_I2C_2_WR); + + for (i = 0; i < 2; i++) { + i2c_del_adapter(&cx->i2c_adap[i]); + } +} + +/* + Hauppauge HVR1600 should have: + 32 cx24227 + 98 unknown + a0 eeprom + c2 tuner + e? zilog ir + */ |