new file mode 100644
@@ -0,0 +1,450 @@
+/*
+ * saa7706.c Philips SAA7706H Car Radio DSP driver
+ * Copyright (c) 2009 Intel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-chip-ident.h>
+
+#define DRIVER_NAME "saa7706h"
+
+/* the I2C memory map looks like this
+
+ $1C00 - $FFFF Not Used
+ $2200 - $3FFF Reserved YRAM (DSP2) space
+ $2000 - $21FF YRAM (DSP2)
+ $1FF0 - $1FFF Hardware Registers
+ $1280 - $1FEF Reserved XRAM (DSP2) space
+ $1000 - $127F XRAM (DSP2)
+ $0FFF DSP CONTROL
+ $0A00 - $0FFE Reserved
+ $0980 - $09FF Reserved YRAM (DSP1) space
+ $0800 - $097F YRAM (DSP1)
+ $0200 - $07FF Not Used
+ $0180 - $01FF Reserved XRAM (DSP1) space
+ $0000 - $017F XRAM (DSP1)
+*/
+
+#define SAA7706H_REG_CTRL 0x0fff
+#define SAA7706H_CTRL_BYP_PLL 0x0001
+#define SAA7706H_CTRL_PLL_DIV_MASK 0x003e
+#define SAA7706H_CTRL_PLL3_62975MHZ 0x003e
+#define SAA7706H_CTRL_DSP_TURBO 0x0040
+#define SAA7706H_CTRL_PC_RESET_DSP1 0x0080
+#define SAA7706H_CTRL_PC_RESET_DSP2 0x0100
+#define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600
+#define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000
+#define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800
+#define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000
+#define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000
+
+#define SAA7706H_REG_EVALUATION 0x1ff0
+#define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001
+#define SAA7706H_EVAL_DCS_CLOCK 0x000002
+#define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004
+#define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008
+
+#define SAA7706H_REG_CL_GEN1 0x1ff3
+#define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f
+#define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0
+#define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00
+
+#define SAA7706H_REG_CL_GEN2 0x1ff4
+#define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001
+#define SAA7706H_CL_GEN2_STOP_VCO 0x000002
+#define SAA7706H_CL_GEN2_FRERUN 0x000004
+#define SAA7706H_CL_GEN2_ADAPTIVE 0x000008
+#define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0
+
+#define SAA7706H_REG_CL_GEN4 0x1ff6
+#define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000
+#define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000
+#define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000
+
+#define SAA7706H_REG_SEL 0x1ff7
+#define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007
+#define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031
+#define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0
+#define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00
+#define SAA7706H_SEL_DSP1_SRC_MASK 0x003000
+#define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003
+#define SAA7706H_SEL_SPDIF2 0x020000
+#define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000
+#define SAA7706H_SEL_EN_HOST_IO 0x200000
+
+#define SAA7706H_REG_IAC 0x1ff8
+#define SAA7706H_REG_CLK_SET 0x1ff9
+#define SAA7706H_REG_CLK_COEFF 0x1ffa
+#define SAA7706H_REG_INPUT_SENS 0x1ffb
+#define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f
+#define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0
+#define SAA7706H_INPUT_SENS_FM_MPX 0x01000
+#define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000
+#define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000
+#define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc
+#define SAA7706H_REG_IO_CONF_DSP2 0x1ffd
+#define SAA7706H_REG_STATUS_DSP2 0x1ffe
+#define SAA7706H_REG_PC_DSP2 0x1fff
+
+#define SAA7706H_DSP1_MOD0 0x0800
+#define SAA7706H_DSP1_ROM_VER 0x097f
+#define SAA7706H_DSP2_MPTR0 0x1000
+
+#define SAA7706H_DSP1_MODPNTR 0x0000
+
+#define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e
+#define SAA7706H_DSP2_XMEM_BUSAMP 0x114a
+#define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9
+#define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb
+
+#define SAA7706H_DSP2_YMEM_PVGA 0x212a
+#define SAA7706H_DSP2_YMEM_PVAT1 0x212b
+#define SAA7706H_DSP2_YMEM_PVAT 0x212c
+#define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff
+
+#define SUPPORTED_DSP1_ROM_VER 0x667
+
+struct saa7706h_state {
+ struct v4l2_subdev sd;
+ unsigned muted;
+};
+
+static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct saa7706h_state, sd);
+}
+
+static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len)
+{
+ int err = i2c_master_send(client, data, len);
+ if (err == len)
+ return 0;
+ return err > 0 ? -EIO : err;
+}
+
+static int saa7706h_i2c_transfer(struct i2c_client *client,
+ struct i2c_msg *msgs, int num)
+{
+ int err = i2c_transfer(client->adapter, msgs, num);
+ if (err == num)
+ return 0;
+ return err > 0 ? -EIO : err;
+}
+
+static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[5];
+ int pos = 0;
+
+ buf[pos++] = reg >> 8;
+ buf[pos++] = reg;
+ buf[pos++] = val >> 16;
+ buf[pos++] = val >> 8;
+ buf[pos++] = val;
+
+ return saa7706h_i2c_send(client, buf, pos);
+}
+
+static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
+ int *err)
+{
+ return *err ? *err : saa7706h_set_reg24(sd, reg, val);
+}
+
+static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[4];
+ int pos = 0;
+
+ buf[pos++] = reg >> 8;
+ buf[pos++] = reg;
+ buf[pos++] = val >> 8;
+ buf[pos++] = val;
+
+ return saa7706h_i2c_send(client, buf, pos);
+}
+
+static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
+ int *err)
+{
+ return *err ? *err : saa7706h_set_reg16(sd, reg, val);
+}
+
+static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+ u8 buf[2];
+ int err;
+ u8 regaddr[] = {reg >> 8, reg};
+ struct i2c_msg msg[] = { {client->addr, 0, sizeof(regaddr), regaddr},
+ {client->addr, I2C_M_RD, sizeof(buf), buf} };
+
+ err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
+ if (err)
+ return err;
+
+ return buf[0] << 8 | buf[1];
+}
+
+static int saa7706h_unmute(struct v4l2_subdev *sd)
+{
+ struct saa7706h_state *state = to_state(sd);
+ int err = 0;
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
+ SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
+ SAA7706H_CTRL_PC_RESET_DSP2, &err);
+
+ /* newer versions of the chip requires a small sleep after reset */
+ msleep(1);
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
+ SAA7706H_CTRL_PLL3_62975MHZ, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
+ SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
+ 0x0e22ff, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
+ &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
+ &err);
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
+ &err);
+
+ err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);
+
+ err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
+ &err);
+ if (!err)
+ state->muted = 0;
+ return err;
+}
+
+static int saa7706h_mute(struct v4l2_subdev *sd)
+{
+ struct saa7706h_state *state = to_state(sd);
+ int err;
+
+ err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
+ SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
+ SAA7706H_CTRL_PC_RESET_DSP2);
+ if (!err)
+ state->muted = 1;
+ return err;
+}
+
+static int saa7706h_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
+{
+ switch (qc->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
+ }
+ return -EINVAL;
+}
+
+static int saa7706h_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ struct saa7706h_state *state = to_state(sd);
+
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ ctrl->value = state->muted;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int saa7706h_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
+{
+ switch (ctrl->id) {
+ case V4L2_CID_AUDIO_MUTE:
+ if (ctrl->value)
+ return saa7706h_mute(sd);
+ return saa7706h_unmute(sd);
+ }
+ return -EINVAL;
+}
+
+static int saa7706h_g_chip_ident(struct v4l2_subdev *sd,
+ struct v4l2_dbg_chip_ident *chip)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7706H, 0);
+}
+
+static const struct v4l2_subdev_core_ops saa7706h_core_ops = {
+ .g_chip_ident = saa7706h_g_chip_ident,
+ .queryctrl = saa7706h_queryctrl,
+ .g_ctrl = saa7706h_g_ctrl,
+ .s_ctrl = saa7706h_s_ctrl,
+};
+
+static const struct v4l2_subdev_ops saa7706h_ops = {
+ .core = &saa7706h_core_ops,
+};
+
+/*
+ * Generic i2c probe
+ * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
+ */
+
+static int __devinit saa7706h_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct saa7706h_state *state;
+ struct v4l2_subdev *sd;
+ int err;
+
+ /* Check if the adapter supports the needed features */
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EIO;
+
+ v4l_info(client, "chip found @ 0x%02x (%s)\n",
+ client->addr << 1, client->adapter->name);
+
+ state = kmalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+ sd = &state->sd;
+ v4l2_i2c_subdev_init(sd, client, &saa7706h_ops);
+
+ /* check the rom versions */
+ err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
+ if (err < 0)
+ goto err;
+ if (err != SUPPORTED_DSP1_ROM_VER)
+ v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);
+
+ state->muted = 1;
+
+ /* startup in a muted state */
+ err = saa7706h_mute(sd);
+ if (err)
+ goto err;
+
+ return 0;
+
+err:
+ v4l2_device_unregister_subdev(sd);
+ kfree(to_state(sd));
+
+ printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
+
+ return err;
+}
+
+static int __devexit saa7706h_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+
+ saa7706h_mute(sd);
+ v4l2_device_unregister_subdev(sd);
+ kfree(to_state(sd));
+ return 0;
+}
+
+static const struct i2c_device_id saa7706h_id[] = {
+ {DRIVER_NAME, 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, saa7706h_id);
+
+static struct i2c_driver saa7706h_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = DRIVER_NAME,
+ },
+ .probe = saa7706h_probe,
+ .remove = saa7706h_remove,
+ .id_table = saa7706h_id,
+};
+
+static __init int saa7706h_init(void)
+{
+ return i2c_add_driver(&saa7706h_driver);
+}
+
+static __exit void saa7706h_exit(void)
+{
+ i2c_del_driver(&saa7706h_driver);
+}
+
+module_init(saa7706h_init);
+module_exit(saa7706h_exit);
+
+MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
+MODULE_AUTHOR("Mocean Laboratories");
+MODULE_LICENSE("GPL v2");