#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>
*/
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;
}
}
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.
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;
}
* 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.
ret = __mcam_cam_reset(cam);
/* Get/set parameters? */
cam->state = S_IDLE;
- mcam_ctlr_power_down(cam);
return ret;
}
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);
}
_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);
}
int mccic_register(struct mcam_camera *cam)
{
+ struct clk_init_data mclk_init = { };
int ret;
/*
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.
}
/*
+ * 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) {
*/
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);
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);
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);
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
-#include <linux/gpio.h>
#include <linux/io.h>
-#include <linux/delay.h>
#include <linux/list.h>
#include <linux/pm.h>
#include <linux/clk.h>
static char *mcam_clks[] = {"axi", "func", "phy"};
struct mmp_camera {
- void __iomem *power_regs;
struct platform_device *pdev;
struct mcam_camera mcam;
struct list_head devlist;
return NULL;
}
-
-
-
-/*
- * Power-related registers; this almost certainly belongs
- * somewhere else.
- *
- * ARMADA 610 register manual, sec 7.2.1, p1842.
- */
-#define CPU_SUBSYS_PMU_BASE 0xd4282800
-#define REG_CCIC_DCGCR 0x28 /* CCIC dyn clock gate ctrl reg */
-#define REG_CCIC_CRCR 0x50 /* CCIC clk reset ctrl reg */
-
-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]);
- }
-}
-
-/*
- * Power control.
- */
-static void mmpcam_power_up_ctlr(struct mmp_camera *cam)
-{
- iowrite32(0x3f, cam->power_regs + REG_CCIC_DCGCR);
- iowrite32(0x3805b, cam->power_regs + REG_CCIC_CRCR);
- mdelay(1);
-}
-
-static int mmpcam_power_up(struct mcam_camera *mcam)
-{
- struct mmp_camera *cam = mcam_to_cam(mcam);
- struct mmp_camera_platform_data *pdata;
-
-/*
- * Turn on power and clocks to the controller.
- */
- mmpcam_power_up_ctlr(cam);
- mcam_clk_enable(mcam);
-/*
- * Provide power to the sensor.
- */
- mcam_reg_write(mcam, REG_CLKCTRL, 0x60000002);
- pdata = cam->pdev->dev.platform_data;
- gpio_set_value(pdata->sensor_power_gpio, 1);
- mdelay(5);
- mcam_reg_clear_bit(mcam, REG_CTRL1, 0x10000000);
- gpio_set_value(pdata->sensor_reset_gpio, 0); /* reset is active low */
- mdelay(5);
- gpio_set_value(pdata->sensor_reset_gpio, 1); /* reset is active low */
- mdelay(5);
-
- return 0;
-}
-
-static void mmpcam_power_down(struct mcam_camera *mcam)
-{
- struct mmp_camera *cam = mcam_to_cam(mcam);
- struct mmp_camera_platform_data *pdata;
-/*
- * Turn off clocks and set reset lines
- */
- iowrite32(0, cam->power_regs + REG_CCIC_DCGCR);
- iowrite32(0, cam->power_regs + REG_CCIC_CRCR);
-/*
- * Shut down the sensor.
- */
- pdata = cam->pdev->dev.platform_data;
- gpio_set_value(pdata->sensor_power_gpio, 0);
- gpio_set_value(pdata->sensor_reset_gpio, 0);
-
- mcam_clk_disable(mcam);
-}
-
/*
* calc the dphy register values
* There are three dphy registers being used.
INIT_LIST_HEAD(&cam->devlist);
mcam = &cam->mcam;
- mcam->plat_power_up = mmpcam_power_up;
- mcam->plat_power_down = mmpcam_power_down;
mcam->calc_dphy = mmpcam_calc_dphy;
mcam->dev = &pdev->dev;
pdata = pdev->dev.platform_data;
if (IS_ERR(mcam->regs))
return PTR_ERR(mcam->regs);
mcam->regs_size = resource_size(res);
- /*
- * Power/clock memory is elsewhere; get it too. Perhaps this
- * should really be managed outside of this driver?
- */
- res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- cam->power_regs = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(cam->power_regs))
- return PTR_ERR(cam->power_regs);
- /*
- * Sensor GPIO pins.
- */
- ret = devm_gpio_request(&pdev->dev, pdata->sensor_power_gpio,
- "cam-power");
- if (ret) {
- dev_err(&pdev->dev, "Can't get sensor power gpio %d",
- pdata->sensor_power_gpio);
- return ret;
- }
- gpio_direction_output(pdata->sensor_power_gpio, 0);
- ret = devm_gpio_request(&pdev->dev, pdata->sensor_reset_gpio,
- "cam-reset");
- if (ret) {
- dev_err(&pdev->dev, "Can't get sensor reset gpio %d",
- pdata->sensor_reset_gpio);
- return ret;
- }
- gpio_direction_output(pdata->sensor_reset_gpio, 0);
mcam_init_clk(mcam);
fwnode_handle_put(ep);
/*
- * Power the device up and hand it off to the core.
+ * Register the device with the core.
*/
- ret = mmpcam_power_up(mcam);
- if (ret)
- return ret;
ret = mccic_register(mcam);
if (ret)
- goto out_power_down;
+ return ret;
+
+ /*
+ * Add OF clock provider.
+ */
+ ret = of_clk_add_provider(pdev->dev.of_node, of_clk_src_simple_get,
+ mcam->mclk);
+ if (ret) {
+ dev_err(&pdev->dev, "can't add DT clock provider\n");
+ goto out;
+ }
/*
* Finally, set up our IRQ now that the core is ready to
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
ret = -ENODEV;
- goto out_unregister;
+ goto out;
}
cam->irq = res->start;
ret = devm_request_irq(&pdev->dev, cam->irq, mmpcam_irq, IRQF_SHARED,
return 0;
}
-out_unregister:
+out:
+ fwnode_handle_put(mcam->asd.match.fwnode);
mccic_shutdown(mcam);
-out_power_down:
- mmpcam_power_down(mcam);
+
return ret;
}
mmpcam_remove_device(cam);
mccic_shutdown(mcam);
- mmpcam_power_down(mcam);
return 0;
}
{
struct mmp_camera *cam = mmpcam_find_device(pdev);
- /*
- * Power up unconditionally just in case the core tries to
- * touch a register even if nothing was active before; trust
- * me, it's better this way.
- */
- mmpcam_power_up_ctlr(cam);
return mccic_resume(&cam->mcam);
}
projects / platform / kernel / linux-rpi.git / commitdiff