--- /dev/null
+/*
+ * Driver for the Conexant CX23885/7/8 PCIe bridge
+ *
+ * CX23888 Integrated Consumer Infrared Controller
+ *
+ * Copyright (C) 2009 Andy Walls <awalls@radix.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., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+#include "cx23885.h"
+
+#define CX23888_IR_REG_BASE 0x170000
+/*
+ * These CX23888 register offsets have a straightforward one to one mapping
+ * to the CX23885 register offsets of 0x200 through 0x218
+ */
+#define CX23888_IR_CNTRL_REG 0x170000
+#define CX23888_IR_TXCLK_REG 0x170004
+#define CX23888_IR_RXCLK_REG 0x170008
+#define CX23888_IR_CDUTY_REG 0x17000C
+#define CX23888_IR_STATS_REG 0x170010
+#define CX23888_IR_IRQEN_REG 0x170014
+#define CX23888_IR_FILTR_REG 0x170018
+/* This register doesn't follow the pattern; it's 0x23C on a CX23885 */
+#define CX23888_IR_FIFO_REG 0x170040
+
+/* CX23888 unique registers */
+#define CX23888_IR_SEEDP_REG 0x17001C
+#define CX23888_IR_TIMOL_REG 0x170020
+#define CX23888_IR_WAKE0_REG 0x170024
+#define CX23888_IR_WAKE1_REG 0x170028
+#define CX23888_IR_WAKE2_REG 0x17002C
+#define CX23888_IR_MASK0_REG 0x170030
+#define CX23888_IR_MASK1_REG 0x170034
+#define CX23888_IR_MAKS2_REG 0x170038
+#define CX23888_IR_DPIPG_REG 0x17003C
+#define CX23888_IR_LEARN_REG 0x170044
+
+
+struct cx23888_ir_state {
+ struct v4l2_subdev sd;
+ struct cx23885_dev *dev;
+ u32 id;
+ u32 rev;
+};
+
+static inline struct cx23888_ir_state *to_state(struct v4l2_subdev *sd)
+{
+ return v4l2_get_subdevdata(sd);
+}
+
+static int cx23888_ir_write(struct cx23885_dev *dev, u32 addr, u8 value)
+{
+ u32 reg = (addr & ~3);
+ int shift = (addr & 3) * 8;
+ u32 x = cx_read(reg);
+
+ x = (x & ~(0xff << shift)) | ((u32)value << shift);
+ cx_write(reg, x);
+ return 0;
+}
+
+static
+inline int cx23888_ir_write4(struct cx23885_dev *dev, u32 addr, u32 value)
+{
+ cx_write(addr, value);
+ return 0;
+}
+
+static u8 cx23888_ir_read(struct cx23885_dev *dev, u32 addr)
+{
+ u32 x = cx_read((addr & ~3));
+ int shift = (addr & 3) * 8;
+
+ return (x >> shift) & 0xff;
+}
+
+static inline u32 cx23888_ir_read4(struct cx23885_dev *dev, u32 addr)
+{
+ return cx_read(addr);
+}
+
+static int cx23888_ir_and_or(struct cx23885_dev *dev, u32 addr,
+ unsigned and_mask, u8 or_value)
+{
+ return cx23888_ir_write(dev, addr,
+ (cx23888_ir_read(dev, addr) & and_mask) |
+ or_value);
+}
+
+static inline int cx23888_ir_and_or4(struct cx23885_dev *dev, u32 addr,
+ u32 and_mask, u32 or_value)
+{
+ cx_andor(addr, and_mask, or_value);
+ return 0;
+}
+
+static int cx23888_ir_log_status(struct v4l2_subdev *sd)
+{
+ struct cx23888_ir_state *state = to_state(sd);
+ struct cx23885_dev *dev = state->dev;
+ u8 cntrl = cx23888_ir_read(dev, CX23888_IR_CNTRL_REG+1);
+ v4l2_info(sd, "receiver %sabled\n", cntrl & 0x1 ? "en" : "dis");
+ v4l2_info(sd, "transmitter %sabled\n", cntrl & 0x2 ? "en" : "dis");
+ return 0;
+}
+
+static inline int cx23888_ir_dbg_match(const struct v4l2_dbg_match *match)
+{
+ return match->type == V4L2_CHIP_MATCH_HOST && match->addr == 2;
+}
+
+static int cx23888_ir_g_chip_ident(struct v4l2_subdev *sd,
+ struct v4l2_dbg_chip_ident *chip)
+{
+ struct cx23888_ir_state *state = to_state(sd);
+
+ if (cx23888_ir_dbg_match(&chip->match)) {
+ chip->ident = state->id;
+ chip->revision = state->rev;
+ }
+ return 0;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int cx23888_ir_g_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct cx23888_ir_state *state = to_state(sd);
+ u32 addr = CX23888_IR_REG_BASE + (u32) reg->reg;
+
+ if (!cx23888_ir_dbg_match(®->match))
+ return -EINVAL;
+ if ((addr & 0x3) != 0)
+ return -EINVAL;
+ if (addr < CX23888_IR_CNTRL_REG || addr > CX23888_IR_LEARN_REG)
+ return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ reg->size = 4;
+ reg->val = cx23888_ir_read4(state->dev, addr);
+ return 0;
+}
+
+static int cx23888_ir_s_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ struct cx23888_ir_state *state = to_state(sd);
+ u32 addr = CX23888_IR_REG_BASE + (u32) reg->reg;
+
+ if (!cx23888_ir_dbg_match(®->match))
+ return -EINVAL;
+ if ((addr & 0x3) != 0)
+ return -EINVAL;
+ if (addr < CX23888_IR_CNTRL_REG || addr > CX23888_IR_LEARN_REG)
+ return -EINVAL;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ cx23888_ir_write4(state->dev, addr, reg->val);
+ return 0;
+}
+#endif
+
+static const struct v4l2_subdev_core_ops cx23888_ir_core_ops = {
+ .g_chip_ident = cx23888_ir_g_chip_ident,
+ .log_status = cx23888_ir_log_status,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = cx23888_ir_g_register,
+ .s_register = cx23888_ir_s_register,
+#endif
+};
+
+static const struct v4l2_subdev_ops cx23888_ir_controller_ops = {
+ .core = &cx23888_ir_core_ops,
+};
+
+int cx23888_ir_probe(struct cx23885_dev *dev)
+{
+ struct cx23888_ir_state *state;
+ struct v4l2_subdev *sd;
+
+ state = kzalloc(sizeof(struct cx23888_ir_state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+
+ state->dev = dev;
+ state->id = V4L2_IDENT_CX23888_IR;
+ state->rev = 0;
+ sd = &state->sd;
+
+ v4l2_subdev_init(sd, &cx23888_ir_controller_ops);
+ v4l2_set_subdevdata(sd, state);
+ /* FIXME - fix the formatting of dev->v4l2_dev.name and use it */
+ snprintf(sd->name, sizeof(sd->name), "%s/888-ir", dev->name);
+ sd->grp_id = CX23885_HW_888_IR;
+ return v4l2_device_register_subdev(&dev->v4l2_dev, sd);
+}
+
+int cx23888_ir_remove(struct cx23885_dev *dev)
+{
+ struct v4l2_subdev *sd;
+ struct cx23888_ir_state *state;
+
+ sd = cx23885_find_hw(dev, CX23885_HW_888_IR);
+ if (sd == NULL)
+ return -ENODEV;
+
+ /* Disable receiver and transmitter */
+ cx23888_ir_and_or(dev, CX23888_IR_CNTRL_REG+1, 0xfc, 0);
+
+ state = to_state(sd);
+ v4l2_device_unregister_subdev(sd);
+ kfree(state);
+ /* Nothing more to free() as state held the actual v4l2_subdev object */
+ return 0;
+}
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff