diff options
Diffstat (limited to 'drivers/media/platform/marvell-ccic/mcam-core.c')
-rw-r--r-- | drivers/media/platform/marvell-ccic/mcam-core.c | 172 |
1 files changed, 130 insertions, 42 deletions
diff --git a/drivers/media/platform/marvell-ccic/mcam-core.c b/drivers/media/platform/marvell-ccic/mcam-core.c index 7dc7d9d91782..f9ac1547d093 100644 --- a/drivers/media/platform/marvell-ccic/mcam-core.c +++ b/drivers/media/platform/marvell-ccic/mcam-core.c @@ -22,6 +22,7 @@ #include <linux/vmalloc.h> #include <linux/io.h> #include <linux/clk.h> +#include <linux/clk-provider.h> #include <linux/videodev2.h> #include <media/v4l2-device.h> #include <media/v4l2-ioctl.h> @@ -303,9 +304,6 @@ static void mcam_enable_mipi(struct mcam_camera *mcam) */ mcam_reg_write(mcam, REG_CSI2_CTRL0, CSI2_C0_MIPI_EN | CSI2_C0_ACT_LANE(mcam->lane)); - mcam_reg_write(mcam, REG_CLKCTRL, - (mcam->mclk_src << 29) | mcam->mclk_div); - mcam->mipi_enabled = true; } } @@ -830,31 +828,6 @@ static void mcam_ctlr_irq_disable(struct mcam_camera *cam) mcam_reg_clear_bit(cam, REG_IRQMASK, FRAMEIRQS); } - - -static void mcam_ctlr_init(struct mcam_camera *cam) -{ - unsigned long flags; - - spin_lock_irqsave(&cam->dev_lock, flags); - /* - * Make sure it's not powered down. - */ - mcam_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); - /* - * Turn off the enable bit. It sure should be off anyway, - * but it's good to be sure. - */ - mcam_reg_clear_bit(cam, REG_CTRL0, C0_ENABLE); - /* - * Clock the sensor appropriately. Controller clock should - * be 48MHz, sensor "typical" value is half that. - */ - mcam_reg_write_mask(cam, REG_CLKCTRL, 2, CLK_DIV_MASK); - spin_unlock_irqrestore(&cam->dev_lock, flags); -} - - /* * Stop the controller, and don't return until we're really sure that no * further DMA is going on. @@ -898,14 +871,15 @@ static int mcam_ctlr_power_up(struct mcam_camera *cam) int ret; spin_lock_irqsave(&cam->dev_lock, flags); - ret = cam->plat_power_up(cam); - if (ret) { - spin_unlock_irqrestore(&cam->dev_lock, flags); - return ret; + if (cam->plat_power_up) { + ret = cam->plat_power_up(cam); + if (ret) { + spin_unlock_irqrestore(&cam->dev_lock, flags); + return ret; + } } mcam_reg_clear_bit(cam, REG_CTRL1, C1_PWRDWN); spin_unlock_irqrestore(&cam->dev_lock, flags); - msleep(5); /* Just to be sure */ return 0; } @@ -920,10 +894,101 @@ static void mcam_ctlr_power_down(struct mcam_camera *cam) * power down routine. */ mcam_reg_set_bit(cam, REG_CTRL1, C1_PWRDWN); - cam->plat_power_down(cam); + if (cam->plat_power_down) + cam->plat_power_down(cam); spin_unlock_irqrestore(&cam->dev_lock, flags); } +/* ---------------------------------------------------------------------- */ +/* + * Controller clocks. + */ +static void mcam_clk_enable(struct mcam_camera *mcam) +{ + unsigned int i; + + for (i = 0; i < NR_MCAM_CLK; i++) { + if (!IS_ERR(mcam->clk[i])) + clk_prepare_enable(mcam->clk[i]); + } +} + +static void mcam_clk_disable(struct mcam_camera *mcam) +{ + int i; + + for (i = NR_MCAM_CLK - 1; i >= 0; i--) { + if (!IS_ERR(mcam->clk[i])) + clk_disable_unprepare(mcam->clk[i]); + } +} + +/* ---------------------------------------------------------------------- */ +/* + * Master sensor clock. + */ +static int mclk_prepare(struct clk_hw *hw) +{ + struct mcam_camera *cam = container_of(hw, struct mcam_camera, mclk_hw); + + clk_prepare(cam->clk[0]); + return 0; +} + +static void mclk_unprepare(struct clk_hw *hw) +{ + struct mcam_camera *cam = container_of(hw, struct mcam_camera, mclk_hw); + + clk_unprepare(cam->clk[0]); +} + +static int mclk_enable(struct clk_hw *hw) +{ + struct mcam_camera *cam = container_of(hw, struct mcam_camera, mclk_hw); + int mclk_src; + int mclk_div; + + /* + * Clock the sensor appropriately. Controller clock should + * be 48MHz, sensor "typical" value is half that. + */ + if (cam->bus_type == V4L2_MBUS_CSI2_DPHY) { + mclk_src = cam->mclk_src; + mclk_div = cam->mclk_div; + } else { + mclk_src = 3; + mclk_div = 2; + } + + clk_enable(cam->clk[0]); + mcam_reg_write(cam, REG_CLKCTRL, (mclk_src << 29) | mclk_div); + mcam_ctlr_power_up(cam); + + return 0; +} + +static void mclk_disable(struct clk_hw *hw) +{ + struct mcam_camera *cam = container_of(hw, struct mcam_camera, mclk_hw); + + mcam_ctlr_power_down(cam); + clk_disable(cam->clk[0]); +} + +static unsigned long mclk_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + return 48000000; +} + +static const struct clk_ops mclk_ops = { + .prepare = mclk_prepare, + .unprepare = mclk_unprepare, + .enable = mclk_enable, + .disable = mclk_disable, + .recalc_rate = mclk_recalc_rate, +}; + /* -------------------------------------------------------------------- */ /* * Communications with the sensor. @@ -948,7 +1013,6 @@ static int mcam_cam_init(struct mcam_camera *cam) ret = __mcam_cam_reset(cam); /* Get/set parameters? */ cam->state = S_IDLE; - mcam_ctlr_power_down(cam); return ret; } @@ -1584,9 +1648,10 @@ static int mcam_v4l_open(struct file *filp) if (ret) goto out; if (v4l2_fh_is_singular_file(filp)) { - ret = mcam_ctlr_power_up(cam); + ret = sensor_call(cam, core, s_power, 1); if (ret) goto out; + mcam_clk_enable(cam); __mcam_cam_reset(cam); mcam_set_config_needed(cam, 1); } @@ -1608,7 +1673,8 @@ static int mcam_v4l_release(struct file *filp) _vb2_fop_release(filp, NULL); if (last_open) { mcam_disable_mipi(cam); - mcam_ctlr_power_down(cam); + sensor_call(cam, core, s_power, 0); + mcam_clk_disable(cam); if (cam->buffer_mode == B_vmalloc && alloc_bufs_at_read) mcam_free_dma_bufs(cam); } @@ -1806,6 +1872,7 @@ static const struct v4l2_async_notifier_operations mccic_notify_ops = { int mccic_register(struct mcam_camera *cam) { + struct clk_init_data mclk_init = { }; int ret; /* @@ -1838,7 +1905,6 @@ int mccic_register(struct mcam_camera *cam) mcam_set_config_needed(cam, 1); cam->pix_format = mcam_def_pix_format; cam->mbus_code = mcam_def_mbus_code; - mcam_ctlr_init(cam); /* * Register sensor notifier. @@ -1858,6 +1924,26 @@ int mccic_register(struct mcam_camera *cam) } /* + * Register sensor master clock. + */ + mclk_init.parent_names = NULL; + mclk_init.num_parents = 0; + mclk_init.ops = &mclk_ops; + mclk_init.name = "mclk"; + + of_property_read_string(cam->dev->of_node, "clock-output-names", + &mclk_init.name); + + cam->mclk_hw.init = &mclk_init; + + cam->mclk = devm_clk_register(cam->dev, &cam->mclk_hw); + if (IS_ERR(cam->mclk)) { + ret = PTR_ERR(cam->mclk); + dev_err(cam->dev, "can't register clock\n"); + goto out; + } + + /* * If so requested, try to get our DMA buffers now. */ if (cam->buffer_mode == B_vmalloc && !alloc_bufs_at_read) { @@ -1884,7 +1970,7 @@ void mccic_shutdown(struct mcam_camera *cam) */ if (!list_empty(&cam->vdev.fh_list)) { cam_warn(cam, "Removing a device with users!\n"); - mcam_ctlr_power_down(cam); + sensor_call(cam, core, s_power, 0); } if (cam->buffer_mode == B_vmalloc) mcam_free_dma_bufs(cam); @@ -1906,7 +1992,8 @@ void mccic_suspend(struct mcam_camera *cam) enum mcam_state cstate = cam->state; mcam_ctlr_stop_dma(cam); - mcam_ctlr_power_down(cam); + sensor_call(cam, core, s_power, 0); + mcam_clk_disable(cam); cam->state = cstate; } mutex_unlock(&cam->s_mutex); @@ -1919,14 +2006,15 @@ int mccic_resume(struct mcam_camera *cam) mutex_lock(&cam->s_mutex); if (!list_empty(&cam->vdev.fh_list)) { - ret = mcam_ctlr_power_up(cam); + mcam_clk_enable(cam); + ret = sensor_call(cam, core, s_power, 1); if (ret) { mutex_unlock(&cam->s_mutex); return ret; } __mcam_cam_reset(cam); } else { - mcam_ctlr_power_down(cam); + sensor_call(cam, core, s_power, 0); } mutex_unlock(&cam->s_mutex); |