diff options
author | Sylwester Nawrocki <s.nawrocki@samsung.com> | 2013-03-26 11:20:30 (GMT) |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-03-31 13:42:58 (GMT) |
commit | 02399e35e6bb716ce9636eba006b792362270034 (patch) | |
tree | 24ec7af43a7ee0c310bf6dd64457396875f7d268 /drivers | |
parent | ee12b049104118a58ac13da207a84c867191b17a (diff) | |
download | linux-fsl-qoriq-02399e35e6bb716ce9636eba006b792362270034.tar.xz |
[media] s5p-csis: Add device tree support
This patch support for binding the driver to the MIPI-CSIS
devices instantiated from device tree and parsing the SoC
and board specific properties. The MIPI CSI-2 channel is
determined by the value of reg property placed in csis'
port subnode.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/media/platform/s5p-fimc/mipi-csis.c | 155 | ||||
-rw-r--r-- | drivers/media/platform/s5p-fimc/mipi-csis.h | 1 |
2 files changed, 121 insertions, 35 deletions
diff --git a/drivers/media/platform/s5p-fimc/mipi-csis.c b/drivers/media/platform/s5p-fimc/mipi-csis.c index 981863d..8636bcd 100644 --- a/drivers/media/platform/s5p-fimc/mipi-csis.c +++ b/drivers/media/platform/s5p-fimc/mipi-csis.c @@ -19,14 +19,18 @@ #include <linux/kernel.h> #include <linux/memory.h> #include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_data/mipi-csis.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/videodev2.h> +#include <media/s5p_fimc.h> +#include <media/v4l2-of.h> #include <media/v4l2-subdev.h> -#include <linux/platform_data/mipi-csis.h> + #include "mipi-csis.h" static int debug; @@ -113,6 +117,7 @@ static char *csi_clock_name[] = { [CSIS_CLK_GATE] = "csis", }; #define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name) +#define DEFAULT_SCLK_CSIS_FREQ 166000000UL static const char * const csis_supply_name[] = { "vddcore", /* CSIS Core (1.0V, 1.1V or 1.2V) suppply */ @@ -167,6 +172,11 @@ struct csis_pktbuf { * @clock: CSIS clocks * @irq: requested s5p-mipi-csis irq number * @flags: the state variable for power and streaming control + * @clock_frequency: device bus clock frequency + * @hs_settle: HS-RX settle time + * @num_lanes: number of MIPI-CSI data lanes used + * @max_num_lanes: maximum number of MIPI-CSI data lanes supported + * @wclk_ext: CSI wrapper clock: 0 - bus clock, 1 - external SCLK_CAM * @csis_fmt: current CSIS pixel format * @format: common media bus format for the source and sink pad * @slock: spinlock protecting structure members below @@ -184,6 +194,13 @@ struct csis_state { struct clk *clock[NUM_CSIS_CLOCKS]; int irq; u32 flags; + + u32 clk_frequency; + u32 hs_settle; + u32 num_lanes; + u32 max_num_lanes; + u8 wclk_ext; + const struct csis_pix_format *csis_fmt; struct v4l2_mbus_framefmt format; @@ -273,7 +290,6 @@ static void s5pcsis_reset(struct csis_state *state) static void s5pcsis_system_enable(struct csis_state *state, int on) { - struct s5p_platform_mipi_csis *pdata = state->pdev->dev.platform_data; u32 val, mask; val = s5pcsis_read(state, S5PCSIS_CTRL); @@ -286,7 +302,7 @@ static void s5pcsis_system_enable(struct csis_state *state, int on) val = s5pcsis_read(state, S5PCSIS_DPHYCTRL); val &= ~S5PCSIS_DPHYCTRL_ENABLE; if (on) { - mask = (1 << (pdata->lanes + 1)) - 1; + mask = (1 << (state->num_lanes + 1)) - 1; val |= (mask & S5PCSIS_DPHYCTRL_ENABLE); } s5pcsis_write(state, S5PCSIS_DPHYCTRL, val); @@ -321,15 +337,14 @@ static void s5pcsis_set_hsync_settle(struct csis_state *state, int settle) static void s5pcsis_set_params(struct csis_state *state) { - struct s5p_platform_mipi_csis *pdata = state->pdev->dev.platform_data; u32 val; val = s5pcsis_read(state, S5PCSIS_CONFIG); - val = (val & ~S5PCSIS_CFG_NR_LANE_MASK) | (pdata->lanes - 1); + val = (val & ~S5PCSIS_CFG_NR_LANE_MASK) | (state->num_lanes - 1); s5pcsis_write(state, S5PCSIS_CONFIG, val); __s5pcsis_set_format(state); - s5pcsis_set_hsync_settle(state, pdata->hs_settle); + s5pcsis_set_hsync_settle(state, state->hs_settle); val = s5pcsis_read(state, S5PCSIS_CTRL); if (state->csis_fmt->data_alignment == 32) @@ -338,7 +353,7 @@ static void s5pcsis_set_params(struct csis_state *state) val &= ~S5PCSIS_CTRL_ALIGN_32BIT; val &= ~S5PCSIS_CTRL_WCLK_EXTCLK; - if (pdata->wclk_source) + if (state->wclk_ext) val |= S5PCSIS_CTRL_WCLK_EXTCLK; s5pcsis_write(state, S5PCSIS_CTRL, val); @@ -701,52 +716,111 @@ static irqreturn_t s5pcsis_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +static int s5pcsis_get_platform_data(struct platform_device *pdev, + struct csis_state *state) +{ + struct s5p_platform_mipi_csis *pdata = pdev->dev.platform_data; + + if (pdata == NULL) { + dev_err(&pdev->dev, "Platform data not specified\n"); + return -EINVAL; + } + + state->clk_frequency = pdata->clk_rate; + state->num_lanes = pdata->lanes; + state->hs_settle = pdata->hs_settle; + state->index = max(0, pdev->id); + state->max_num_lanes = state->index ? CSIS1_MAX_LANES : + CSIS0_MAX_LANES; + return 0; +} + +#ifdef CONFIG_OF +static int s5pcsis_parse_dt(struct platform_device *pdev, + struct csis_state *state) +{ + struct device_node *node = pdev->dev.of_node; + struct v4l2_of_endpoint endpoint; + + if (of_property_read_u32(node, "clock-frequency", + &state->clk_frequency)) + state->clk_frequency = DEFAULT_SCLK_CSIS_FREQ; + if (of_property_read_u32(node, "bus-width", + &state->max_num_lanes)) + return -EINVAL; + + node = v4l2_of_get_next_endpoint(node, NULL); + if (!node) { + dev_err(&pdev->dev, "No port node at %s\n", + node->full_name); + return -EINVAL; + } + /* Get port node and validate MIPI-CSI channel id. */ + v4l2_of_parse_endpoint(node, &endpoint); + + state->index = endpoint.port - FIMC_INPUT_MIPI_CSI2_0; + if (state->index < 0 || state->index >= CSIS_MAX_ENTITIES) + return -ENXIO; + + /* Get MIPI CSI-2 bus configration from the endpoint node. */ + of_property_read_u32(node, "samsung,csis-hs-settle", + &state->hs_settle); + state->wclk_ext = of_property_read_bool(node, + "samsung,csis-wclk"); + + state->num_lanes = endpoint.bus.mipi_csi2.num_data_lanes; + + of_node_put(node); + return 0; +} +#else +#define s5pcsis_parse_dt(pdev, state) (-ENOSYS) +#endif + static int s5pcsis_probe(struct platform_device *pdev) { - struct s5p_platform_mipi_csis *pdata; + struct device *dev = &pdev->dev; struct resource *mem_res; struct csis_state *state; int ret = -ENOMEM; int i; - state = devm_kzalloc(&pdev->dev, sizeof(*state), GFP_KERNEL); + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); if (!state) return -ENOMEM; mutex_init(&state->lock); spin_lock_init(&state->slock); - state->pdev = pdev; - state->index = max(0, pdev->id); - pdata = pdev->dev.platform_data; - if (pdata == NULL) { - dev_err(&pdev->dev, "Platform data not fully specified\n"); - return -EINVAL; - } + if (dev->of_node) + ret = s5pcsis_parse_dt(pdev, state); + else + ret = s5pcsis_get_platform_data(pdev, state); + if (ret < 0) + return ret; - if ((state->index == 1 && pdata->lanes > CSIS1_MAX_LANES) || - pdata->lanes > CSIS0_MAX_LANES) { - dev_err(&pdev->dev, "Unsupported number of data lanes: %d\n", - pdata->lanes); + if (state->num_lanes == 0 || state->num_lanes > state->max_num_lanes) { + dev_err(dev, "Unsupported number of data lanes: %d (max. %d)\n", + state->num_lanes, state->max_num_lanes); return -EINVAL; } mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - state->regs = devm_ioremap_resource(&pdev->dev, mem_res); + state->regs = devm_ioremap_resource(dev, mem_res); if (IS_ERR(state->regs)) return PTR_ERR(state->regs); state->irq = platform_get_irq(pdev, 0); if (state->irq < 0) { - dev_err(&pdev->dev, "Failed to get irq\n"); + dev_err(dev, "Failed to get irq\n"); return state->irq; } for (i = 0; i < CSIS_NUM_SUPPLIES; i++) state->supplies[i].supply = csis_supply_name[i]; - ret = devm_regulator_bulk_get(&pdev->dev, CSIS_NUM_SUPPLIES, + ret = devm_regulator_bulk_get(dev, CSIS_NUM_SUPPLIES, state->supplies); if (ret) return ret; @@ -755,11 +829,11 @@ static int s5pcsis_probe(struct platform_device *pdev) if (ret < 0) return ret; - if (pdata->clk_rate) + if (state->clk_frequency) ret = clk_set_rate(state->clock[CSIS_CLK_MUX], - pdata->clk_rate); + state->clk_frequency); else - dev_WARN(&pdev->dev, "No clock frequency specified!\n"); + dev_WARN(dev, "No clock frequency specified!\n"); if (ret < 0) goto e_clkput; @@ -767,16 +841,17 @@ static int s5pcsis_probe(struct platform_device *pdev) if (ret < 0) goto e_clkput; - ret = devm_request_irq(&pdev->dev, state->irq, s5pcsis_irq_handler, - 0, dev_name(&pdev->dev), state); + ret = devm_request_irq(dev, state->irq, s5pcsis_irq_handler, + 0, dev_name(dev), state); if (ret) { - dev_err(&pdev->dev, "Interrupt request failed\n"); + dev_err(dev, "Interrupt request failed\n"); goto e_clkdis; } v4l2_subdev_init(&state->sd, &s5pcsis_subdev_ops); state->sd.owner = THIS_MODULE; - strlcpy(state->sd.name, dev_name(&pdev->dev), sizeof(state->sd.name)); + snprintf(state->sd.name, sizeof(state->sd.name), "%s.%d", + CSIS_SUBDEV_NAME, state->index); state->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; state->csis_fmt = &s5pcsis_formats[0]; @@ -796,10 +871,12 @@ static int s5pcsis_probe(struct platform_device *pdev) /* .. and a pointer to the subdev. */ platform_set_drvdata(pdev, &state->sd); - memcpy(state->events, s5pcsis_events, sizeof(state->events)); + pm_runtime_enable(dev); - pm_runtime_enable(&pdev->dev); + dev_info(&pdev->dev, "lanes: %d, hs_settle: %d, wclk: %d, freq: %u\n", + state->num_lanes, state->hs_settle, state->wclk_ext, + state->clk_frequency); return 0; e_clkdis: @@ -923,13 +1000,21 @@ static const struct dev_pm_ops s5pcsis_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(s5pcsis_suspend, s5pcsis_resume) }; +static const struct of_device_id s5pcsis_of_match[] = { + { .compatible = "samsung,s5pv210-csis" }, + { .compatible = "samsung,exynos4210-csis" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, s5pcsis_of_match); + static struct platform_driver s5pcsis_driver = { .probe = s5pcsis_probe, .remove = s5pcsis_remove, .driver = { - .name = CSIS_DRIVER_NAME, - .owner = THIS_MODULE, - .pm = &s5pcsis_pm_ops, + .of_match_table = s5pcsis_of_match, + .name = CSIS_DRIVER_NAME, + .owner = THIS_MODULE, + .pm = &s5pcsis_pm_ops, }, }; diff --git a/drivers/media/platform/s5p-fimc/mipi-csis.h b/drivers/media/platform/s5p-fimc/mipi-csis.h index 2709286..28c11c4 100644 --- a/drivers/media/platform/s5p-fimc/mipi-csis.h +++ b/drivers/media/platform/s5p-fimc/mipi-csis.h @@ -11,6 +11,7 @@ #define S5P_MIPI_CSIS_H_ #define CSIS_DRIVER_NAME "s5p-mipi-csis" +#define CSIS_SUBDEV_NAME CSIS_DRIVER_NAME #define CSIS_MAX_ENTITIES 2 #define CSIS0_MAX_LANES 4 #define CSIS1_MAX_LANES 2 |