* Samsung S5P/EXYNOS4 SoC series MIPI-CSI receiver driver
*
* Copyright (C) 2011 - 2012 Samsung Electronics Co., Ltd.
- * Sylwester Nawrocki, <s.nawrocki@samsung.com>
+ * Sylwester Nawrocki <s.nawrocki@samsung.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
static int debug;
module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Debug level (0-1)");
+MODULE_PARM_DESC(debug, "Debug level (0-2)");
/* Register map definition */
#define S5PCSIS_CFG_FMT_MASK (0x3f << 2)
#define S5PCSIS_CFG_NR_LANE_MASK 3
-/* Interrupt mask. */
+/* Interrupt mask */
#define S5PCSIS_INTMSK 0x10
-#define S5PCSIS_INTMSK_EN_ALL 0xf000003f
+#define S5PCSIS_INTMSK_EN_ALL 0xf000103f
+#define S5PCSIS_INTMSK_EVEN_BEFORE (1 << 31)
+#define S5PCSIS_INTMSK_EVEN_AFTER (1 << 30)
+#define S5PCSIS_INTMSK_ODD_BEFORE (1 << 29)
+#define S5PCSIS_INTMSK_ODD_AFTER (1 << 28)
+#define S5PCSIS_INTMSK_ERR_SOT_HS (1 << 12)
+#define S5PCSIS_INTMSK_ERR_LOST_FS (1 << 5)
+#define S5PCSIS_INTMSK_ERR_LOST_FE (1 << 4)
+#define S5PCSIS_INTMSK_ERR_OVER (1 << 3)
+#define S5PCSIS_INTMSK_ERR_ECC (1 << 2)
+#define S5PCSIS_INTMSK_ERR_CRC (1 << 1)
+#define S5PCSIS_INTMSK_ERR_UNKNOWN (1 << 0)
+
+/* Interrupt source */
#define S5PCSIS_INTSRC 0x14
+#define S5PCSIS_INTSRC_EVEN_BEFORE (1 << 31)
+#define S5PCSIS_INTSRC_EVEN_AFTER (1 << 30)
+#define S5PCSIS_INTSRC_EVEN (0x3 << 30)
+#define S5PCSIS_INTSRC_ODD_BEFORE (1 << 29)
+#define S5PCSIS_INTSRC_ODD_AFTER (1 << 28)
+#define S5PCSIS_INTSRC_ODD (0x3 << 28)
+#define S5PCSIS_INTSRC_NON_IMAGE_DATA (0xff << 28)
+#define S5PCSIS_INTSRC_ERR_SOT_HS (0xf << 12)
+#define S5PCSIS_INTSRC_ERR_LOST_FS (1 << 5)
+#define S5PCSIS_INTSRC_ERR_LOST_FE (1 << 4)
+#define S5PCSIS_INTSRC_ERR_OVER (1 << 3)
+#define S5PCSIS_INTSRC_ERR_ECC (1 << 2)
+#define S5PCSIS_INTSRC_ERR_CRC (1 << 1)
+#define S5PCSIS_INTSRC_ERR_UNKNOWN (1 << 0)
+#define S5PCSIS_INTSRC_ERRORS 0xf03f
/* Pixel resolution */
#define S5PCSIS_RESOL 0x2c
#define CSIS_MAX_PIX_WIDTH 0xffff
#define CSIS_MAX_PIX_HEIGHT 0xffff
+/* Non-image packet data buffers */
+#define S5PCSIS_PKTDATA_ODD 0x2000
+#define S5PCSIS_PKTDATA_EVEN 0x3000
+#define S5PCSIS_PKTDATA_SIZE SZ_4K
+
enum {
CSIS_CLK_MUX,
CSIS_CLK_GATE,
#define NUM_CSIS_CLOCKS ARRAY_SIZE(csi_clock_name)
static const char * const csis_supply_name[] = {
- "vdd11", /* 1.1V or 1.2V (s5pc100) MIPI CSI suppply */
- "vdd18", /* VDD 1.8V and MIPI CSI PLL supply */
+ "vddcore", /* CSIS Core (1.0V, 1.1V or 1.2V) suppply */
+ "vddio", /* CSIS I/O and PLL (1.8V) supply */
};
#define CSIS_NUM_SUPPLIES ARRAY_SIZE(csis_supply_name)
ST_SUSPENDED = 4,
};
+struct s5pcsis_event {
+ u32 mask;
+ const char * const name;
+ unsigned int counter;
+};
+
+static const struct s5pcsis_event s5pcsis_events[] = {
+ /* Errors */
+ { S5PCSIS_INTSRC_ERR_SOT_HS, "SOT Error" },
+ { S5PCSIS_INTSRC_ERR_LOST_FS, "Lost Frame Start Error" },
+ { S5PCSIS_INTSRC_ERR_LOST_FE, "Lost Frame End Error" },
+ { S5PCSIS_INTSRC_ERR_OVER, "FIFO Overflow Error" },
+ { S5PCSIS_INTSRC_ERR_ECC, "ECC Error" },
+ { S5PCSIS_INTSRC_ERR_CRC, "CRC Error" },
+ { S5PCSIS_INTSRC_ERR_UNKNOWN, "Unknown Error" },
+ /* Non-image data receive events */
+ { S5PCSIS_INTSRC_EVEN_BEFORE, "Non-image data before even frame" },
+ { S5PCSIS_INTSRC_EVEN_AFTER, "Non-image data after even frame" },
+ { S5PCSIS_INTSRC_ODD_BEFORE, "Non-image data before odd frame" },
+ { S5PCSIS_INTSRC_ODD_AFTER, "Non-image data after odd frame" },
+};
+#define S5PCSIS_NUM_EVENTS ARRAY_SIZE(s5pcsis_events)
+
+struct csis_pktbuf {
+ u32 *data;
+ unsigned int len;
+};
+
/**
* struct csis_state - the driver's internal state data structure
* @lock: mutex serializing the subdev and power management operations,
* @sd: v4l2_subdev associated with CSIS device instance
* @pdev: CSIS platform device
* @regs: mmaped I/O registers memory
+ * @supplies: CSIS regulator supplies
* @clock: CSIS clocks
* @irq: requested s5p-mipi-csis irq number
* @flags: the state variable for power and streaming control
* @csis_fmt: current CSIS pixel format
* @format: common media bus format for the source and sink pad
+ * @slock: spinlock protecting structure members below
+ * @pkt_buf: the frame embedded (non-image) data buffer
+ * @events: MIPI-CSIS event (error) counters
*/
struct csis_state {
struct mutex lock;
u32 flags;
const struct csis_pix_format *csis_fmt;
struct v4l2_mbus_framefmt format;
+
+ struct spinlock slock;
+ struct csis_pktbuf pkt_buf;
+ struct s5pcsis_event events[S5PCSIS_NUM_EVENTS];
};
/**
.code = V4L2_MBUS_FMT_JPEG_1X8,
.fmt_reg = S5PCSIS_CFG_FMT_USER(1),
.data_alignment = 32,
- },
+ }, {
+ .code = V4L2_MBUS_FMT_S5C_UYVY_JPEG_1X8,
+ .fmt_reg = S5PCSIS_CFG_FMT_USER(1),
+ .data_alignment = 32,
+ }
};
#define s5pcsis_write(__csis, __r, __v) writel(__v, __csis->regs + __r)
struct v4l2_mbus_framefmt *mf = &state->format;
u32 val;
- v4l2_dbg(1, debug, &state->sd, "fmt: %d, %d x %d\n",
+ v4l2_dbg(1, debug, &state->sd, "fmt: %#x, %d x %d\n",
mf->code, mf->width, mf->height);
/* Color format */
return -ENXIO;
}
-static int s5pcsis_s_power(struct v4l2_subdev *sd, int on)
-{
- struct csis_state *state = sd_to_csis_state(sd);
- struct device *dev = &state->pdev->dev;
-
- if (on)
- return pm_runtime_get_sync(dev);
-
- return pm_runtime_put_sync(dev);
-}
-
static void s5pcsis_start_stream(struct csis_state *state)
{
s5pcsis_reset(state);
s5pcsis_system_enable(state, false);
}
-/* v4l2_subdev operations */
+static void s5pcsis_clear_counters(struct csis_state *state)
+{
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&state->slock, flags);
+ for (i = 0; i < S5PCSIS_NUM_EVENTS; i++)
+ state->events[i].counter = 0;
+ spin_unlock_irqrestore(&state->slock, flags);
+}
+
+static void s5pcsis_log_counters(struct csis_state *state, bool non_errors)
+{
+ int i = non_errors ? S5PCSIS_NUM_EVENTS : S5PCSIS_NUM_EVENTS - 4;
+ unsigned long flags;
+
+ spin_lock_irqsave(&state->slock, flags);
+
+ for (i--; i >= 0; i--)
+ if (state->events[i].counter >= 0)
+ v4l2_info(&state->sd, "%s events: %d\n",
+ state->events[i].name,
+ state->events[i].counter);
+
+ spin_unlock_irqrestore(&state->slock, flags);
+}
+
+/*
+ * V4L2 subdev operations
+ */
+static int s5pcsis_s_power(struct v4l2_subdev *sd, int on)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ struct device *dev = &state->pdev->dev;
+
+ if (on)
+ return pm_runtime_get_sync(dev);
+
+ return pm_runtime_put_sync(dev);
+}
+
static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable)
{
struct csis_state *state = sd_to_csis_state(sd);
__func__, enable, state->flags);
if (enable) {
+ s5pcsis_clear_counters(state);
ret = pm_runtime_get_sync(&state->pdev->dev);
if (ret && ret != 1)
return ret;
}
+
mutex_lock(&state->lock);
if (enable) {
if (state->flags & ST_SUSPENDED) {
} else {
s5pcsis_stop_stream(state);
state->flags &= ~ST_STREAMING;
+ if (debug > 0)
+ s5pcsis_log_counters(state, true);
}
unlock:
mutex_unlock(&state->lock);
return 0;
}
+static int s5pcsis_s_rx_buffer(struct v4l2_subdev *sd, void *buf,
+ unsigned int *size)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+ unsigned long flags;
+
+ *size = min_t(unsigned int, *size, S5PCSIS_PKTDATA_SIZE);
+
+ spin_lock_irqsave(&state->slock, flags);
+ state->pkt_buf.data = buf;
+ state->pkt_buf.len = *size;
+ spin_unlock_irqrestore(&state->slock, flags);
+
+ return 0;
+}
+
+static int s5pcsis_log_status(struct v4l2_subdev *sd)
+{
+ struct csis_state *state = sd_to_csis_state(sd);
+
+ s5pcsis_log_counters(state, true);
+ return 0;
+}
+
static int s5pcsis_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_mbus_framefmt *format = v4l2_subdev_get_try_format(fh, 0);
static struct v4l2_subdev_core_ops s5pcsis_core_ops = {
.s_power = s5pcsis_s_power,
+ .log_status = s5pcsis_log_status,
};
static struct v4l2_subdev_pad_ops s5pcsis_pad_ops = {
};
static struct v4l2_subdev_video_ops s5pcsis_video_ops = {
+ .s_rx_buffer = s5pcsis_s_rx_buffer,
.s_stream = s5pcsis_s_stream,
};
static irqreturn_t s5pcsis_irq_handler(int irq, void *dev_id)
{
struct csis_state *state = dev_id;
- u32 val;
+ struct csis_pktbuf *pktbuf = &state->pkt_buf;
+ unsigned long flags;
+ u32 status;
- /* Just clear the interrupt pending bits. */
- val = s5pcsis_read(state, S5PCSIS_INTSRC);
- s5pcsis_write(state, S5PCSIS_INTSRC, val);
+ status = s5pcsis_read(state, S5PCSIS_INTSRC);
+ spin_lock_irqsave(&state->slock, flags);
+ if ((status & S5PCSIS_INTSRC_NON_IMAGE_DATA) && pktbuf->data) {
+ u32 offset;
+
+ if (status & S5PCSIS_INTSRC_EVEN)
+ offset = S5PCSIS_PKTDATA_EVEN;
+ else
+ offset = S5PCSIS_PKTDATA_ODD;
+
+ memcpy(pktbuf->data, state->regs + offset, pktbuf->len);
+ pktbuf->data = NULL;
+ rmb();
+ }
+
+ /* Update the event/error counters */
+ if ((status & S5PCSIS_INTSRC_ERRORS) || debug) {
+ int i;
+ for (i = 0; i < S5PCSIS_NUM_EVENTS; i++) {
+ if (!(status & state->events[i].mask))
+ continue;
+ state->events[i].counter++;
+ v4l2_dbg(2, debug, &state->sd, "%s: %d\n",
+ state->events[i].name,
+ state->events[i].counter);
+ }
+ v4l2_dbg(2, debug, &state->sd, "status: %08x\n", status);
+ }
+ spin_unlock_irqrestore(&state->slock, flags);
+
+ s5pcsis_write(state, S5PCSIS_INTSRC, status);
return IRQ_HANDLED;
}
return -ENOMEM;
mutex_init(&state->lock);
+ spin_lock_init(&state->slock);
+
state->pdev = pdev;
pdata = pdev->dev.platform_data;
/* .. and a pointer to the subdev. */
platform_set_drvdata(pdev, &state->sd);
+ memcpy(state->events, s5pcsis_events, sizeof(state->events));
+
pm_runtime_enable(&pdev->dev);
return 0;
projects / karo-tx-linux.git / blobdiff