/* * cx18 I2C functions * * Derived from ivtv-i2c.c * * Copyright (C) 2007 Hans Verkuil * Copyright (C) 2008 Andy Walls * * 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 /* 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 */ }; /* 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 */ }; /* This array should match the CX18_HW_ defines */ static const char * const hw_modules[] = { "tuner", /* CX18_HW_TUNER */ NULL, /* CX18_HW_TVEEPROM */ "cs5345", /* CX18_HW_CS5345 */ NULL, /* CX18_HW_DVB */ NULL, /* CX18_HW_418_AV */ NULL, /* CX18_HW_GPIO_MUX */ NULL, /* CX18_HW_GPIO_RESET_CTRL */ }; /* 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", }; 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 *mod = hw_modules[idx]; const char *type = hw_devicenames[idx]; u32 hw = 1 << idx; if (idx >= ARRAY_SIZE(hw_addrs)) return -1; if (hw == CX18_HW_TUNER) { /* special tuner group handling */ sd = v4l2_i2c_new_probed_subdev(adap, mod, type, cx->card_i2c->radio); if (sd != NULL) sd->grp_id = hw; sd = v4l2_i2c_new_probed_subdev(adap, mod, type, cx->card_i2c->demod); if (sd != NULL) sd->grp_id = hw; sd = v4l2_i2c_new_probed_subdev(adap, mod, type, cx->card_i2c->tv); if (sd != NULL) sd->grp_id = hw; return sd != NULL ? 0 : -1; } /* 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 */ sd = v4l2_i2c_new_subdev(adap, mod, type, hw_addrs[idx]); 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", .id = I2C_HW_B_CX2341X, .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 algo-bit adapter */ int init_cx18_i2c(struct cx18 *cx) { int i; CX18_DEBUG_I2C("i2c init\n"); for (i = 0; i < 2; i++) { /* Setup algorithm for adapter */ memcpy(&cx->i2c_algo[i], &cx18_i2c_algo_template, sizeof(struct i2c_algo_bit_data)); 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 */ memcpy(&cx->i2c_adap[i], &cx18_i2c_adap_template, sizeof(struct i2c_adapter)); 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 */ 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); return i2c_bit_add_bus(&cx->i2c_adap[0]) || i2c_bit_add_bus(&cx->i2c_adap[1]); } 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 */