432 lines
12 KiB
C
432 lines
12 KiB
C
/*
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* saa7706.c Philips SAA7706H Car Radio DSP driver
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* Copyright (c) 2009 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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#define DRIVER_NAME "saa7706h"
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/* the I2C memory map looks like this
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$1C00 - $FFFF Not Used
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$2200 - $3FFF Reserved YRAM (DSP2) space
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$2000 - $21FF YRAM (DSP2)
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$1FF0 - $1FFF Hardware Registers
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$1280 - $1FEF Reserved XRAM (DSP2) space
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$1000 - $127F XRAM (DSP2)
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$0FFF DSP CONTROL
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$0A00 - $0FFE Reserved
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$0980 - $09FF Reserved YRAM (DSP1) space
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$0800 - $097F YRAM (DSP1)
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$0200 - $07FF Not Used
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$0180 - $01FF Reserved XRAM (DSP1) space
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$0000 - $017F XRAM (DSP1)
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*/
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#define SAA7706H_REG_CTRL 0x0fff
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#define SAA7706H_CTRL_BYP_PLL 0x0001
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#define SAA7706H_CTRL_PLL_DIV_MASK 0x003e
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#define SAA7706H_CTRL_PLL3_62975MHZ 0x003e
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#define SAA7706H_CTRL_DSP_TURBO 0x0040
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#define SAA7706H_CTRL_PC_RESET_DSP1 0x0080
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#define SAA7706H_CTRL_PC_RESET_DSP2 0x0100
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#define SAA7706H_CTRL_DSP1_ROM_EN_MASK 0x0600
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#define SAA7706H_CTRL_DSP1_FUNC_PROM 0x0000
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#define SAA7706H_CTRL_DSP2_ROM_EN_MASK 0x1800
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#define SAA7706H_CTRL_DSP2_FUNC_PROM 0x0000
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#define SAA7706H_CTRL_DIG_SIL_INTERPOL 0x8000
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#define SAA7706H_REG_EVALUATION 0x1ff0
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#define SAA7706H_EVAL_DISABLE_CHARGE_PUMP 0x000001
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#define SAA7706H_EVAL_DCS_CLOCK 0x000002
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#define SAA7706H_EVAL_GNDRC1_ENABLE 0x000004
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#define SAA7706H_EVAL_GNDRC2_ENABLE 0x000008
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#define SAA7706H_REG_CL_GEN1 0x1ff3
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#define SAA7706H_CL_GEN1_MIN_LOOPGAIN_MASK 0x00000f
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#define SAA7706H_CL_GEN1_LOOPGAIN_MASK 0x0000f0
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#define SAA7706H_CL_GEN1_COARSE_RATION 0xffff00
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#define SAA7706H_REG_CL_GEN2 0x1ff4
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#define SAA7706H_CL_GEN2_WSEDGE_FALLING 0x000001
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#define SAA7706H_CL_GEN2_STOP_VCO 0x000002
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#define SAA7706H_CL_GEN2_FRERUN 0x000004
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#define SAA7706H_CL_GEN2_ADAPTIVE 0x000008
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#define SAA7706H_CL_GEN2_FINE_RATIO_MASK 0x0ffff0
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#define SAA7706H_REG_CL_GEN4 0x1ff6
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#define SAA7706H_CL_GEN4_BYPASS_PLL1 0x001000
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#define SAA7706H_CL_GEN4_PLL1_DIV_MASK 0x03e000
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#define SAA7706H_CL_GEN4_DSP1_TURBO 0x040000
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#define SAA7706H_REG_SEL 0x1ff7
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#define SAA7706H_SEL_DSP2_SRCA_MASK 0x000007
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#define SAA7706H_SEL_DSP2_FMTA_MASK 0x000031
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#define SAA7706H_SEL_DSP2_SRCB_MASK 0x0001c0
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#define SAA7706H_SEL_DSP2_FMTB_MASK 0x000e00
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#define SAA7706H_SEL_DSP1_SRC_MASK 0x003000
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#define SAA7706H_SEL_DSP1_FMT_MASK 0x01c003
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#define SAA7706H_SEL_SPDIF2 0x020000
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#define SAA7706H_SEL_HOST_IO_FMT_MASK 0x1c0000
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#define SAA7706H_SEL_EN_HOST_IO 0x200000
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#define SAA7706H_REG_IAC 0x1ff8
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#define SAA7706H_REG_CLK_SET 0x1ff9
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#define SAA7706H_REG_CLK_COEFF 0x1ffa
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#define SAA7706H_REG_INPUT_SENS 0x1ffb
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#define SAA7706H_INPUT_SENS_RDS_VOL_MASK 0x0003f
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#define SAA7706H_INPUT_SENS_FM_VOL_MASK 0x00fc0
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#define SAA7706H_INPUT_SENS_FM_MPX 0x01000
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#define SAA7706H_INPUT_SENS_OFF_FILTER_A_EN 0x02000
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#define SAA7706H_INPUT_SENS_OFF_FILTER_B_EN 0x04000
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#define SAA7706H_REG_PHONE_NAV_AUDIO 0x1ffc
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#define SAA7706H_REG_IO_CONF_DSP2 0x1ffd
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#define SAA7706H_REG_STATUS_DSP2 0x1ffe
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#define SAA7706H_REG_PC_DSP2 0x1fff
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#define SAA7706H_DSP1_MOD0 0x0800
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#define SAA7706H_DSP1_ROM_VER 0x097f
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#define SAA7706H_DSP2_MPTR0 0x1000
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#define SAA7706H_DSP1_MODPNTR 0x0000
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#define SAA7706H_DSP2_XMEM_CONTLLCW 0x113e
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#define SAA7706H_DSP2_XMEM_BUSAMP 0x114a
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#define SAA7706H_DSP2_XMEM_FDACPNTR 0x11f9
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#define SAA7706H_DSP2_XMEM_IIS1PNTR 0x11fb
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#define SAA7706H_DSP2_YMEM_PVGA 0x212a
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#define SAA7706H_DSP2_YMEM_PVAT1 0x212b
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#define SAA7706H_DSP2_YMEM_PVAT 0x212c
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#define SAA7706H_DSP2_YMEM_ROM_VER 0x21ff
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#define SUPPORTED_DSP1_ROM_VER 0x667
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struct saa7706h_state {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler hdl;
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unsigned muted;
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};
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static inline struct saa7706h_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct saa7706h_state, sd);
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}
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static int saa7706h_i2c_send(struct i2c_client *client, const u8 *data, int len)
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{
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int err = i2c_master_send(client, data, len);
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if (err == len)
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return 0;
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return err > 0 ? -EIO : err;
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}
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static int saa7706h_i2c_transfer(struct i2c_client *client,
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struct i2c_msg *msgs, int num)
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{
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int err = i2c_transfer(client->adapter, msgs, num);
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if (err == num)
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return 0;
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return err > 0 ? -EIO : err;
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}
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static int saa7706h_set_reg24(struct v4l2_subdev *sd, u16 reg, u32 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[5];
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int pos = 0;
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buf[pos++] = reg >> 8;
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buf[pos++] = reg;
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buf[pos++] = val >> 16;
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buf[pos++] = val >> 8;
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buf[pos++] = val;
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return saa7706h_i2c_send(client, buf, pos);
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}
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static int saa7706h_set_reg24_err(struct v4l2_subdev *sd, u16 reg, u32 val,
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int *err)
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{
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return *err ? *err : saa7706h_set_reg24(sd, reg, val);
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}
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static int saa7706h_set_reg16(struct v4l2_subdev *sd, u16 reg, u16 val)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[4];
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int pos = 0;
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buf[pos++] = reg >> 8;
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buf[pos++] = reg;
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buf[pos++] = val >> 8;
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buf[pos++] = val;
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return saa7706h_i2c_send(client, buf, pos);
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}
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static int saa7706h_set_reg16_err(struct v4l2_subdev *sd, u16 reg, u16 val,
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int *err)
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{
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return *err ? *err : saa7706h_set_reg16(sd, reg, val);
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}
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static int saa7706h_get_reg16(struct v4l2_subdev *sd, u16 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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u8 buf[2];
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int err;
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u8 regaddr[] = {reg >> 8, reg};
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struct i2c_msg msg[] = {
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{
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.addr = client->addr,
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.len = sizeof(regaddr),
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.buf = regaddr
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},
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{
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = sizeof(buf),
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.buf = buf
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}
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};
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err = saa7706h_i2c_transfer(client, msg, ARRAY_SIZE(msg));
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if (err)
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return err;
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return buf[0] << 8 | buf[1];
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}
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static int saa7706h_unmute(struct v4l2_subdev *sd)
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{
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struct saa7706h_state *state = to_state(sd);
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int err = 0;
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err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
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SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
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SAA7706H_CTRL_PC_RESET_DSP2, &err);
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/* newer versions of the chip requires a small sleep after reset */
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msleep(1);
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err = saa7706h_set_reg16_err(sd, SAA7706H_REG_CTRL,
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SAA7706H_CTRL_PLL3_62975MHZ, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_EVALUATION, 0, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN1, 0x040022, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN2,
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SAA7706H_CL_GEN2_WSEDGE_FALLING, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CL_GEN4, 0x024080, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_SEL, 0x200080, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IAC, 0xf4caed, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_SET, 0x124334, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_CLK_COEFF, 0x004a1a,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_INPUT_SENS, 0x0071c7,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PHONE_NAV_AUDIO,
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0x0e22ff, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_IO_CONF_DSP2, 0x001ff8,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_STATUS_DSP2, 0x080003,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_REG_PC_DSP2, 0x000004, &err);
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err = saa7706h_set_reg16_err(sd, SAA7706H_DSP1_MOD0, 0x0c6c, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_MPTR0, 0x000b4b, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x000600, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP1_MODPNTR, 0x0000c0, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000819,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x00085a,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_BUSAMP, 0x7fffff,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_FDACPNTR, 0x2000cb,
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&err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_IIS1PNTR, 0x2000cb,
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&err);
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err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVGA, 0x0f80, &err);
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err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT1, 0x0800,
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&err);
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err = saa7706h_set_reg16_err(sd, SAA7706H_DSP2_YMEM_PVAT, 0x0800, &err);
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err = saa7706h_set_reg24_err(sd, SAA7706H_DSP2_XMEM_CONTLLCW, 0x000905,
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&err);
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if (!err)
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state->muted = 0;
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return err;
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}
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static int saa7706h_mute(struct v4l2_subdev *sd)
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{
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struct saa7706h_state *state = to_state(sd);
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int err;
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err = saa7706h_set_reg16(sd, SAA7706H_REG_CTRL,
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SAA7706H_CTRL_PLL3_62975MHZ | SAA7706H_CTRL_PC_RESET_DSP1 |
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SAA7706H_CTRL_PC_RESET_DSP2);
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if (!err)
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state->muted = 1;
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return err;
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}
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static int saa7706h_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct saa7706h_state *state =
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container_of(ctrl->handler, struct saa7706h_state, hdl);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (ctrl->val)
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return saa7706h_mute(&state->sd);
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return saa7706h_unmute(&state->sd);
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}
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return -EINVAL;
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}
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static const struct v4l2_ctrl_ops saa7706h_ctrl_ops = {
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.s_ctrl = saa7706h_s_ctrl,
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};
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static const struct v4l2_subdev_ops empty_ops = {};
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int saa7706h_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct saa7706h_state *state;
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struct v4l2_subdev *sd;
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int err;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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v4l_info(client, "chip found @ 0x%02x (%s)\n",
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client->addr << 1, client->adapter->name);
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state = kzalloc(sizeof(struct saa7706h_state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &empty_ops);
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v4l2_ctrl_handler_init(&state->hdl, 4);
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v4l2_ctrl_new_std(&state->hdl, &saa7706h_ctrl_ops,
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V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1);
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sd->ctrl_handler = &state->hdl;
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err = state->hdl.error;
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if (err)
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goto err;
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/* check the rom versions */
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err = saa7706h_get_reg16(sd, SAA7706H_DSP1_ROM_VER);
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if (err < 0)
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goto err;
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if (err != SUPPORTED_DSP1_ROM_VER)
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v4l2_warn(sd, "Unknown DSP1 ROM code version: 0x%x\n", err);
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state->muted = 1;
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/* startup in a muted state */
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err = saa7706h_mute(sd);
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if (err)
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goto err;
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return 0;
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err:
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v4l2_device_unregister_subdev(sd);
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v4l2_ctrl_handler_free(&state->hdl);
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kfree(to_state(sd));
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printk(KERN_ERR DRIVER_NAME ": Failed to probe: %d\n", err);
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return err;
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}
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static int saa7706h_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct saa7706h_state *state = to_state(sd);
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saa7706h_mute(sd);
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v4l2_device_unregister_subdev(sd);
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v4l2_ctrl_handler_free(&state->hdl);
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kfree(to_state(sd));
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return 0;
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}
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static const struct i2c_device_id saa7706h_id[] = {
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{DRIVER_NAME, 0},
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{},
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};
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MODULE_DEVICE_TABLE(i2c, saa7706h_id);
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static struct i2c_driver saa7706h_driver = {
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.driver = {
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.name = DRIVER_NAME,
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},
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.probe = saa7706h_probe,
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.remove = saa7706h_remove,
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.id_table = saa7706h_id,
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};
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module_i2c_driver(saa7706h_driver);
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MODULE_DESCRIPTION("SAA7706H Car Radio DSP driver");
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MODULE_AUTHOR("Mocean Laboratories");
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MODULE_LICENSE("GPL v2");
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