--- /dev/null
+/*
+ * 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
+ */
Code Review / kvmfornfv.git / blobdiff