DaVinci: DM646x - platform changes for vpif capture and display drivers

VPIF display changes (Chaithrika)

Add platform device and resource structures. Also define a platform specific
clock setup function that can be accessed by the driver to configure the clock
and CPLD.

VPIF caputure changes (Murali)

1) Modify vpif_subdev_info to add board_info, routing information and
   vpif interface configuration. Remove addr since it is part of
   board_info

2) Add code to setup channel mode and input decoder path for vpif
   capture driver

Also incorporated comments against version v0 of the patch series and
added a spinlock to protect writes to common registers

Tested on DM6467 on channel 0 using TVP514x. Following bootargs used
for drivers:

   vpif_capture.ch0_bufsize=829440 vpif_display.ch2_bufsize=829440

Signed-off-by: Manjunath Hadli <mrh@ti.com>
Signed-off-by: Brijesh Jadav <brijesh.j@ti.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Muralidharan Karicheri <m-karicheri2@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 318 insertions, 1 deletions

diff --git a/arch/arm/mach-davinci/board-dm646x-evm.c b/arch/arm/mach-davinci/board-dm646x-evm.c
index 20547049b489..24e0e13b1492 100644
--- a/arch/arm/mach-davinci/board-dm646x-evm.c
+++ b/arch/arm/mach-davinci/board-dm646x-evm.c
@@ -34,6 +34,8 @@
 #include <linux/i2c/pcf857x.h>
 #include <linux/etherdevice.h>
 
+#include <media/tvp514x.h>
+
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -62,6 +64,30 @@
 #define DM646X_EVM_PHY_MASK             (0x2)
 #define DM646X_EVM_MDIO_FREQUENCY       (2200000) /* PHY bus frequency */
 
+#define VIDCLKCTL_OFFSET        (DAVINCI_SYSTEM_MODULE_BASE + 0x38)
+#define VSCLKDIS_OFFSET         (DAVINCI_SYSTEM_MODULE_BASE + 0x6c)
+#define VCH2CLK_MASK            (BIT_MASK(10) | BIT_MASK(9) | BIT_MASK(8))
+#define VCH2CLK_SYSCLK8         (BIT(9))
+#define VCH2CLK_AUXCLK          (BIT(9) | BIT(8))
+#define VCH3CLK_MASK            (BIT_MASK(14) | BIT_MASK(13) | BIT_MASK(12))
+#define VCH3CLK_SYSCLK8         (BIT(13))
+#define VCH3CLK_AUXCLK          (BIT(14) | BIT(13))
+
+#define VIDCH2CLK               (BIT(10))
+#define VIDCH3CLK               (BIT(11))
+#define VIDCH1CLK               (BIT(4))
+#define TVP7002_INPUT           (BIT(4))
+#define TVP5147_INPUT           (~BIT(4))
+#define VPIF_INPUT_ONE_CHANNEL  (BIT(5))
+#define VPIF_INPUT_TWO_CHANNEL  (~BIT(5))
+#define TVP5147_CH0             "tvp514x-0"
+#define TVP5147_CH1             "tvp514x-1"
+
+static void __iomem *vpif_vidclkctl_reg;
+static void __iomem *vpif_vsclkdis_reg;
+/* spin lock for updating above registers */
+static spinlock_t vpif_reg_lock;
+
 static struct davinci_uart_config uart_config __initdata = {
         .enabled_uarts = (1 << 0),
 };
@@ -287,6 +313,40 @@ static struct snd_platform_data dm646x_evm_snd_data[] = {
         },
 };
 
+static struct i2c_client *cpld_client;
+
+static int cpld_video_probe(struct i2c_client *client,
+                        const struct i2c_device_id *id)
+{
+        cpld_client = client;
+        return 0;
+}
+
+static int __devexit cpld_video_remove(struct i2c_client *client)
+{
+        cpld_client = NULL;
+        return 0;
+}
+
+static const struct i2c_device_id cpld_video_id[] = {
+        { "cpld_video", 0 },
+        { }
+};
+
+static struct i2c_driver cpld_video_driver = {
+        .driver = {
+                .name   = "cpld_video",
+        },
+        .probe          = cpld_video_probe,
+        .remove         = cpld_video_remove,
+        .id_table       = cpld_video_id,
+};
+
+static void evm_init_cpld(void)
+{
+        i2c_add_driver(&cpld_video_driver);
+}
+
 static struct i2c_board_info __initdata i2c_info[] =  {
         {
                 I2C_BOARD_INFO("24c256", 0x50),
@@ -301,7 +361,10 @@ static struct i2c_board_info __initdata i2c_info[] =  {
         },
         {
                 I2C_BOARD_INFO("tlv320aic33", 0x18),
-        }
+        },
+        {
+                I2C_BOARD_INFO("cpld_video", 0x3b),
+        },
 };
 
 static struct davinci_i2c_platform_data i2c_pdata = {
@@ -309,11 +372,265 @@ static struct davinci_i2c_platform_data i2c_pdata = {
         .bus_delay      = 0 /* usec */,
 };
 
+static int set_vpif_clock(int mux_mode, int hd)
+{
+        unsigned long flags;
+        unsigned int value;
+        int val = 0;
+        int err = 0;
+
+        if (!vpif_vidclkctl_reg || !vpif_vsclkdis_reg || !cpld_client)
+                return -ENXIO;
+
+        /* disable the clock */
+        spin_lock_irqsave(&vpif_reg_lock, flags);
+        value = __raw_readl(vpif_vsclkdis_reg);
+        value |= (VIDCH3CLK | VIDCH2CLK);
+        __raw_writel(value, vpif_vsclkdis_reg);
+        spin_unlock_irqrestore(&vpif_reg_lock, flags);
+
+        val = i2c_smbus_read_byte(cpld_client);
+        if (val < 0)
+                return val;
+
+        if (mux_mode == 1)
+                val &= ~0x40;
+        else
+                val |= 0x40;
+
+        err = i2c_smbus_write_byte(cpld_client, val);
+        if (err)
+                return err;
+
+        value = __raw_readl(vpif_vidclkctl_reg);
+        value &= ~(VCH2CLK_MASK);
+        value &= ~(VCH3CLK_MASK);
+
+        if (hd >= 1)
+                value |= (VCH2CLK_SYSCLK8 | VCH3CLK_SYSCLK8);
+        else
+                value |= (VCH2CLK_AUXCLK | VCH3CLK_AUXCLK);
+
+        __raw_writel(value, vpif_vidclkctl_reg);
+
+        spin_lock_irqsave(&vpif_reg_lock, flags);
+        value = __raw_readl(vpif_vsclkdis_reg);
+        /* enable the clock */
+        value &= ~(VIDCH3CLK | VIDCH2CLK);
+        __raw_writel(value, vpif_vsclkdis_reg);
+        spin_unlock_irqrestore(&vpif_reg_lock, flags);
+
+        return 0;
+}
+
+static struct vpif_subdev_info dm646x_vpif_subdev[] = {
+        {
+                .name   = "adv7343",
+                .board_info = {
+                        I2C_BOARD_INFO("adv7343", 0x2a),
+                },
+        },
+        {
+                .name   = "ths7303",
+                .board_info = {
+                        I2C_BOARD_INFO("ths7303", 0x2c),
+                },
+        },
+};
+
+static const char *output[] = {
+        "Composite",
+        "Component",
+        "S-Video",
+};
+
+static struct vpif_display_config dm646x_vpif_display_config = {
+        .set_clock      = set_vpif_clock,
+        .subdevinfo     = dm646x_vpif_subdev,
+        .subdev_count   = ARRAY_SIZE(dm646x_vpif_subdev),
+        .output         = output,
+        .output_count   = ARRAY_SIZE(output),
+        .card_name      = "DM646x EVM",
+};
+
+/**
+ * setup_vpif_input_path()
+ * @channel: channel id (0 - CH0, 1 - CH1)
+ * @sub_dev_name: ptr sub device name
+ *
+ * This will set vpif input to capture data from tvp514x or
+ * tvp7002.
+ */
+static int setup_vpif_input_path(int channel, const char *sub_dev_name)
+{
+        int err = 0;
+        int val;
+
+        /* for channel 1, we don't do anything */
+        if (channel != 0)
+                return 0;
+
+        if (!cpld_client)
+                return -ENXIO;
+
+        val = i2c_smbus_read_byte(cpld_client);
+        if (val < 0)
+                return val;
+
+        if (!strcmp(sub_dev_name, TVP5147_CH0) ||
+            !strcmp(sub_dev_name, TVP5147_CH1))
+                val &= TVP5147_INPUT;
+        else
+                val |= TVP7002_INPUT;
+
+        err = i2c_smbus_write_byte(cpld_client, val);
+        if (err)
+                return err;
+        return 0;
+}
+
+/**
+ * setup_vpif_input_channel_mode()
+ * @mux_mode:  mux mode. 0 - 1 channel or (1) - 2 channel
+ *
+ * This will setup input mode to one channel (TVP7002) or 2 channel (TVP5147)
+ */
+static int setup_vpif_input_channel_mode(int mux_mode)
+{
+        unsigned long flags;
+        int err = 0;
+        int val;
+        u32 value;
+
+        if (!vpif_vsclkdis_reg || !cpld_client)
+                return -ENXIO;
+
+        val = i2c_smbus_read_byte(cpld_client);
+        if (val < 0)
+                return val;
+
+        spin_lock_irqsave(&vpif_reg_lock, flags);
+        value = __raw_readl(vpif_vsclkdis_reg);
+        if (mux_mode) {
+                val &= VPIF_INPUT_TWO_CHANNEL;
+                value |= VIDCH1CLK;
+        } else {
+                val |= VPIF_INPUT_ONE_CHANNEL;
+                value &= ~VIDCH1CLK;
+        }
+        __raw_writel(value, vpif_vsclkdis_reg);
+        spin_unlock_irqrestore(&vpif_reg_lock, flags);
+
+        err = i2c_smbus_write_byte(cpld_client, val);
+        if (err)
+                return err;
+
+        return 0;
+}
+
+static struct tvp514x_platform_data tvp5146_pdata = {
+        .clk_polarity = 0,
+        .hs_polarity = 1,
+        .vs_polarity = 1
+};
+
+#define TVP514X_STD_ALL (V4L2_STD_NTSC | V4L2_STD_PAL)
+
+static struct vpif_subdev_info vpif_capture_sdev_info[] = {
+        {
+                .name   = TVP5147_CH0,
+                .board_info = {
+                        I2C_BOARD_INFO("tvp5146", 0x5d),
+                        .platform_data = &tvp5146_pdata,
+                },
+                .input = INPUT_CVBS_VI2B,
+                .output = OUTPUT_10BIT_422_EMBEDDED_SYNC,
+                .can_route = 1,
+                .vpif_if = {
+                        .if_type = VPIF_IF_BT656,
+                        .hd_pol = 1,
+                        .vd_pol = 1,
+                        .fid_pol = 0,
+                },
+        },
+        {
+                .name   = TVP5147_CH1,
+                .board_info = {
+                        I2C_BOARD_INFO("tvp5146", 0x5c),
+                        .platform_data = &tvp5146_pdata,
+                },
+                .input = INPUT_SVIDEO_VI2C_VI1C,
+                .output = OUTPUT_10BIT_422_EMBEDDED_SYNC,
+                .can_route = 1,
+                .vpif_if = {
+                        .if_type = VPIF_IF_BT656,
+                        .hd_pol = 1,
+                        .vd_pol = 1,
+                        .fid_pol = 0,
+                },
+        },
+};
+
+static const struct vpif_input dm6467_ch0_inputs[] = {
+        {
+                .input = {
+                        .index = 0,
+                        .name = "Composite",
+                        .type = V4L2_INPUT_TYPE_CAMERA,
+                        .std = TVP514X_STD_ALL,
+                },
+                .subdev_name = TVP5147_CH0,
+        },
+};
+
+static const struct vpif_input dm6467_ch1_inputs[] = {
+       {
+                .input = {
+                        .index = 0,
+                        .name = "S-Video",
+                        .type = V4L2_INPUT_TYPE_CAMERA,
+                        .std = TVP514X_STD_ALL,
+                },
+                .subdev_name = TVP5147_CH1,
+        },
+};
+
+static struct vpif_capture_config dm646x_vpif_capture_cfg = {
+        .setup_input_path = setup_vpif_input_path,
+        .setup_input_channel_mode = setup_vpif_input_channel_mode,
+        .subdev_info = vpif_capture_sdev_info,
+        .subdev_count = ARRAY_SIZE(vpif_capture_sdev_info),
+        .chan_config[0] = {
+                .inputs = dm6467_ch0_inputs,
+                .input_count = ARRAY_SIZE(dm6467_ch0_inputs),
+        },
+        .chan_config[1] = {
+                .inputs = dm6467_ch1_inputs,
+                .input_count = ARRAY_SIZE(dm6467_ch1_inputs),
+        },
+};
+
+static void __init evm_init_video(void)
+{
+        vpif_vidclkctl_reg = ioremap(VIDCLKCTL_OFFSET, 4);
+        vpif_vsclkdis_reg = ioremap(VSCLKDIS_OFFSET, 4);
+        if (!vpif_vidclkctl_reg || !vpif_vsclkdis_reg) {
+                pr_err("Can't map VPIF VIDCLKCTL or VSCLKDIS registers\n");
+                return;
+        }
+        spin_lock_init(&vpif_reg_lock);
+
+        dm646x_setup_vpif(&dm646x_vpif_display_config,
+                          &dm646x_vpif_capture_cfg);
+}
+
 static void __init evm_init_i2c(void)
 {
         davinci_init_i2c(&i2c_pdata);
         i2c_add_driver(&dm6467evm_cpld_driver);
         i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
+        evm_init_cpld();
+        evm_init_video();
 }
 
 static void __init davinci_map_io(void)