new file mode 100644
@@ -0,0 +1,1127 @@
+/*
+ * camss-ispif.c
+ *
+ * Qualcomm MSM Camera Subsystem - ISPIF Module
+ *
+ * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2015-2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+#include "camss-ispif.h"
+#include "camss.h"
+
+#define MSM_ISPIF_NAME "msm_ispif"
+
+#define ispif_line_array(ptr_line) \
+ ((const struct ispif_line (*)[]) &(ptr_line[-(ptr_line->id)]))
+
+#define to_ispif(ptr_line) \
+ container_of(ispif_line_array(ptr_line), struct ispif_device, ptr_line)
+
+#define ISPIF_RST_CMD_0 0x008
+#define ISPIF_IRQ_GLOBAL_CLEAR_CMD 0x01c
+#define ISPIF_VFE_m_CTRL_0(m) (0x200 + 0x200 * (m))
+#define ISPIF_VFE_m_CTRL_0_PIX0_LINE_BUF_EN (1 << 6)
+#define ISPIF_VFE_m_IRQ_MASK_0(m) (0x208 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE 0x00001249
+#define ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK 0x00001fff
+#define ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE 0x02492000
+#define ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK 0x03ffe000
+#define ISPIF_VFE_m_IRQ_MASK_1(m) (0x20c + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE 0x00001249
+#define ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK 0x00001fff
+#define ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE 0x02492000
+#define ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK 0x03ffe000
+#define ISPIF_VFE_m_IRQ_MASK_2(m) (0x210 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE 0x00001249
+#define ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK 0x00001fff
+#define ISPIF_VFE_m_IRQ_STATUS_0(m) (0x21c + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW (1 << 12)
+#define ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW (1 << 25)
+#define ISPIF_VFE_m_IRQ_STATUS_1(m) (0x220 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW (1 << 12)
+#define ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW (1 << 25)
+#define ISPIF_VFE_m_IRQ_STATUS_2(m) (0x224 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW (1 << 12)
+#define ISPIF_VFE_m_IRQ_CLEAR_0(m) (0x230 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_CLEAR_1(m) (0x234 + 0x200 * (m))
+#define ISPIF_VFE_m_IRQ_CLEAR_2(m) (0x238 + 0x200 * (m))
+#define ISPIF_VFE_m_INTF_INPUT_SEL(m) (0x244 + 0x200 * (m))
+#define ISPIF_VFE_m_INTF_CMD_0(m) (0x248 + 0x200 * (m))
+#define ISPIF_VFE_m_INTF_CMD_1(m) (0x24c + 0x200 * (m))
+#define ISPIF_VFE_m_PIX_INTF_n_CID_MASK(m, n) \
+ (0x254 + 0x200 * (m) + 0x4 * (n))
+#define ISPIF_VFE_m_RDI_INTF_n_CID_MASK(m, n) \
+ (0x264 + 0x200 * (m) + 0x4 * (n))
+#define ISPIF_VFE_m_PIX_INTF_n_STATUS(m, n) \
+ (0x2c0 + 0x200 * (m) + 0x4 * (n))
+#define ISPIF_VFE_m_RDI_INTF_n_STATUS(m, n) \
+ (0x2d0 + 0x200 * (m) + 0x4 * (n))
+
+#define CSI_PIX_CLK_MUX_SEL 0x000
+#define CSI_RDI_CLK_MUX_SEL 0x008
+
+#define ISPIF_TIMEOUT_SLEEP_US 1000
+#define ISPIF_TIMEOUT_ALL_US 1000000
+#define ISPIF_RESET_TIMEOUT_MS 500
+
+enum ispif_intf_cmd {
+ CMD_DISABLE_FRAME_BOUNDARY = 0x0,
+ CMD_ENABLE_FRAME_BOUNDARY = 0x1,
+ CMD_DISABLE_IMMEDIATELY = 0x2,
+ CMD_ALL_DISABLE_IMMEDIATELY = 0xaaaaaaaa,
+ CMD_ALL_NO_CHANGE = 0xffffffff,
+};
+
+static const u32 ispif_formats[] = {
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_VYUY8_2X8,
+ MEDIA_BUS_FMT_YUYV8_2X8,
+ MEDIA_BUS_FMT_YVYU8_2X8,
+ MEDIA_BUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_SGBRG8_1X8,
+ MEDIA_BUS_FMT_SGRBG8_1X8,
+ MEDIA_BUS_FMT_SRGGB8_1X8,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SBGGR12_1X12,
+ MEDIA_BUS_FMT_SGBRG12_1X12,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_SRGGB12_1X12,
+};
+
+/*
+ * ispif_isr - ISPIF module interrupt handler
+ * @irq: Interrupt line
+ * @dev: ISPIF device
+ *
+ * Return IRQ_HANDLED on success
+ */
+static irqreturn_t ispif_isr(int irq, void *dev)
+{
+ struct ispif_device *ispif = dev;
+ u32 value0, value1, value2;
+
+ value0 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_0(0));
+ value1 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_1(0));
+ value2 = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_STATUS_2(0));
+
+ writel_relaxed(value0, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(0));
+ writel_relaxed(value1, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(0));
+ writel_relaxed(value2, ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(0));
+
+ writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
+
+ if ((value0 >> 27) & 0x1)
+ complete(&ispif->reset_complete);
+
+ if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_PIX0_OVERFLOW))
+ dev_err_ratelimited(to_device(ispif), "VFE0 pix0 overflow\n");
+
+ if (unlikely(value0 & ISPIF_VFE_m_IRQ_STATUS_0_RDI0_OVERFLOW))
+ dev_err_ratelimited(to_device(ispif), "VFE0 rdi0 overflow\n");
+
+ if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_PIX1_OVERFLOW))
+ dev_err_ratelimited(to_device(ispif), "VFE0 pix1 overflow\n");
+
+ if (unlikely(value1 & ISPIF_VFE_m_IRQ_STATUS_1_RDI1_OVERFLOW))
+ dev_err_ratelimited(to_device(ispif), "VFE0 rdi1 overflow\n");
+
+ if (unlikely(value2 & ISPIF_VFE_m_IRQ_STATUS_2_RDI2_OVERFLOW))
+ dev_err_ratelimited(to_device(ispif), "VFE0 rdi2 overflow\n");
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * ispif_reset - Trigger reset on ISPIF module and wait to complete
+ * @ispif: ISPIF device
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int ispif_reset(struct ispif_device *ispif)
+{
+ unsigned long time;
+ int ret;
+
+ ret = camss_enable_clocks(ispif->nclocks_for_reset,
+ ispif->clock_for_reset,
+ to_device(ispif));
+ if (ret < 0)
+ return ret;
+
+ reinit_completion(&ispif->reset_complete);
+
+ writel_relaxed(0x000f1fff, ispif->base + ISPIF_RST_CMD_0);
+
+ time = wait_for_completion_timeout(&ispif->reset_complete,
+ msecs_to_jiffies(ISPIF_RESET_TIMEOUT_MS));
+ if (!time) {
+ dev_err(to_device(ispif), "ISPIF reset timeout\n");
+ return -EIO;
+ }
+
+ camss_disable_clocks(ispif->nclocks_for_reset, ispif->clock_for_reset);
+
+ return 0;
+}
+
+/*
+ * ispif_set_power - Power on/off ISPIF module
+ * @sd: ISPIF V4L2 subdevice
+ * @on: Requested power state
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int ispif_set_power(struct v4l2_subdev *sd, int on)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct ispif_device *ispif = to_ispif(line);
+ struct device *dev = to_device(ispif);
+ int ret = 0;
+
+ mutex_lock(&ispif->power_lock);
+
+ if (on) {
+ if (ispif->power_count) {
+ /* Power is already on */
+ ispif->power_count++;
+ goto exit;
+ }
+
+ ret = camss_enable_clocks(ispif->nclocks, ispif->clock, dev);
+ if (ret < 0)
+ goto exit;
+
+ ret = ispif_reset(ispif);
+ if (ret < 0) {
+ camss_disable_clocks(ispif->nclocks, ispif->clock);
+ goto exit;
+ }
+
+ ispif->intf_cmd[line->vfe_id].cmd_0 = CMD_ALL_NO_CHANGE;
+ ispif->intf_cmd[line->vfe_id].cmd_1 = CMD_ALL_NO_CHANGE;
+
+ ispif->power_count++;
+ } else {
+ if (ispif->power_count == 0) {
+ dev_err(dev, "ispif power off on power_count == 0\n");
+ goto exit;
+ } else if (ispif->power_count == 1) {
+ camss_disable_clocks(ispif->nclocks, ispif->clock);
+ }
+
+ ispif->power_count--;
+ }
+
+exit:
+ mutex_unlock(&ispif->power_lock);
+
+ return ret;
+}
+
+/*
+ * ispif_select_clk_mux - Select clock for PIX/RDI interface
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @csid: CSID HW module id
+ * @vfe: VFE HW module id
+ * @enable: enable or disable the selected clock
+ */
+static void ispif_select_clk_mux(struct ispif_device *ispif,
+ enum ispif_intf intf, u8 csid,
+ u8 vfe, u8 enable)
+{
+ u32 val;
+
+ switch (intf) {
+ case PIX0:
+ val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
+ val &= ~(0xf << (vfe * 8));
+ if (enable)
+ val |= (csid << (vfe * 8));
+ writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
+ break;
+
+ case RDI0:
+ val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ val &= ~(0xf << (vfe * 12));
+ if (enable)
+ val |= (csid << (vfe * 12));
+ writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ break;
+
+ case PIX1:
+ val = readl_relaxed(ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
+ val &= ~(0xf << (4 + (vfe * 8)));
+ if (enable)
+ val |= (csid << (4 + (vfe * 8)));
+ writel_relaxed(val, ispif->base_clk_mux + CSI_PIX_CLK_MUX_SEL);
+ break;
+
+ case RDI1:
+ val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ val &= ~(0xf << (4 + (vfe * 12)));
+ if (enable)
+ val |= (csid << (4 + (vfe * 12)));
+ writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ break;
+
+ case RDI2:
+ val = readl_relaxed(ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ val &= ~(0xf << (8 + (vfe * 12)));
+ if (enable)
+ val |= (csid << (8 + (vfe * 12)));
+ writel_relaxed(val, ispif->base_clk_mux + CSI_RDI_CLK_MUX_SEL);
+ break;
+ }
+
+ mb();
+}
+
+/*
+ * ispif_validate_intf_status - Validate current status of PIX/RDI interface
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @vfe: VFE HW module id
+ *
+ * Return 0 when interface is idle or -EBUSY otherwise
+ */
+static int ispif_validate_intf_status(struct ispif_device *ispif,
+ enum ispif_intf intf, u8 vfe)
+{
+ int ret = 0;
+ u32 val = 0;
+
+ switch (intf) {
+ case PIX0:
+ val = readl_relaxed(ispif->base +
+ ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0));
+ break;
+ case RDI0:
+ val = readl_relaxed(ispif->base +
+ ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0));
+ break;
+ case PIX1:
+ val = readl_relaxed(ispif->base +
+ ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1));
+ break;
+ case RDI1:
+ val = readl_relaxed(ispif->base +
+ ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1));
+ break;
+ case RDI2:
+ val = readl_relaxed(ispif->base +
+ ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2));
+ break;
+ }
+
+ if ((val & 0xf) != 0xf) {
+ dev_err(to_device(ispif), "%s: ispif is busy: 0x%x\n",
+ __func__, val);
+ ret = -EBUSY;
+ }
+
+ return ret;
+}
+
+/*
+ * ispif_wait_for_stop - Wait for PIX/RDI interface to stop
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @vfe: VFE HW module id
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int ispif_wait_for_stop(struct ispif_device *ispif,
+ enum ispif_intf intf, u8 vfe)
+{
+ u32 addr = 0;
+ u32 stop_flag = 0;
+ int ret;
+
+ switch (intf) {
+ case PIX0:
+ addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 0);
+ break;
+ case RDI0:
+ addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 0);
+ break;
+ case PIX1:
+ addr = ISPIF_VFE_m_PIX_INTF_n_STATUS(vfe, 1);
+ break;
+ case RDI1:
+ addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 1);
+ break;
+ case RDI2:
+ addr = ISPIF_VFE_m_RDI_INTF_n_STATUS(vfe, 2);
+ break;
+ }
+
+ ret = readl_poll_timeout(ispif->base + addr,
+ stop_flag,
+ (stop_flag & 0xf) == 0xf,
+ ISPIF_TIMEOUT_SLEEP_US,
+ ISPIF_TIMEOUT_ALL_US);
+ if (ret < 0)
+ dev_err(to_device(ispif), "%s: ispif stop timeout\n",
+ __func__);
+
+ return ret;
+}
+
+/*
+ * ispif_select_csid - Select CSID HW module for input from
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @csid: CSID HW module id
+ * @vfe: VFE HW module id
+ * @enable: enable or disable the selected input
+ */
+static void ispif_select_csid(struct ispif_device *ispif, enum ispif_intf intf,
+ u8 csid, u8 vfe, u8 enable)
+{
+ u32 val;
+
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
+ switch (intf) {
+ case PIX0:
+ val &= ~(BIT(1) | BIT(0));
+ if (enable)
+ val |= csid;
+ break;
+ case RDI0:
+ val &= ~(BIT(5) | BIT(4));
+ if (enable)
+ val |= (csid << 4);
+ break;
+ case PIX1:
+ val &= ~(BIT(9) | BIT(8));
+ if (enable)
+ val |= (csid << 8);
+ break;
+ case RDI1:
+ val &= ~(BIT(13) | BIT(12));
+ if (enable)
+ val |= (csid << 12);
+ break;
+ case RDI2:
+ val &= ~(BIT(21) | BIT(20));
+ if (enable)
+ val |= (csid << 20);
+ break;
+ }
+
+ writel(val, ispif->base + ISPIF_VFE_m_INTF_INPUT_SEL(vfe));
+}
+
+/*
+ * ispif_select_cid - Enable/disable desired CID
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @cid: desired CID to enable/disable
+ * @vfe: VFE HW module id
+ * @enable: enable or disable the desired CID
+ */
+static void ispif_select_cid(struct ispif_device *ispif, enum ispif_intf intf,
+ u8 cid, u8 vfe, u8 enable)
+{
+ u32 cid_mask = 1 << cid;
+ u32 addr = 0;
+ u32 val;
+
+ switch (intf) {
+ case PIX0:
+ addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 0);
+ break;
+ case RDI0:
+ addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 0);
+ break;
+ case PIX1:
+ addr = ISPIF_VFE_m_PIX_INTF_n_CID_MASK(vfe, 1);
+ break;
+ case RDI1:
+ addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 1);
+ break;
+ case RDI2:
+ addr = ISPIF_VFE_m_RDI_INTF_n_CID_MASK(vfe, 2);
+ break;
+ }
+
+ val = readl_relaxed(ispif->base + addr);
+ if (enable)
+ val |= cid_mask;
+ else
+ val &= ~cid_mask;
+
+ writel(val, ispif->base + addr);
+}
+
+/*
+ * ispif_config_irq - Enable/disable interrupts for PIX/RDI interface
+ * @ispif: ISPIF device
+ * @intf: VFE interface
+ * @vfe: VFE HW module id
+ * @enable: enable or disable
+ */
+static void ispif_config_irq(struct ispif_device *ispif, enum ispif_intf intf,
+ u8 vfe, u8 enable)
+{
+ u32 val;
+
+ switch (intf) {
+ case PIX0:
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
+ val &= ~ISPIF_VFE_m_IRQ_MASK_0_PIX0_MASK;
+ if (enable)
+ val |= ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE;
+ writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
+ writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_PIX0_ENABLE,
+ ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
+ break;
+ case RDI0:
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
+ val &= ~ISPIF_VFE_m_IRQ_MASK_0_RDI0_MASK;
+ if (enable)
+ val |= ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE;
+ writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_0(vfe));
+ writel_relaxed(ISPIF_VFE_m_IRQ_MASK_0_RDI0_ENABLE,
+ ispif->base + ISPIF_VFE_m_IRQ_CLEAR_0(vfe));
+ break;
+ case PIX1:
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
+ val &= ~ISPIF_VFE_m_IRQ_MASK_1_PIX1_MASK;
+ if (enable)
+ val |= ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE;
+ writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
+ writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_PIX1_ENABLE,
+ ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
+ break;
+ case RDI1:
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
+ val &= ~ISPIF_VFE_m_IRQ_MASK_1_RDI1_MASK;
+ if (enable)
+ val |= ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE;
+ writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_1(vfe));
+ writel_relaxed(ISPIF_VFE_m_IRQ_MASK_1_RDI1_ENABLE,
+ ispif->base + ISPIF_VFE_m_IRQ_CLEAR_1(vfe));
+ break;
+ case RDI2:
+ val = readl_relaxed(ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
+ val &= ~ISPIF_VFE_m_IRQ_MASK_2_RDI2_MASK;
+ if (enable)
+ val |= ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE;
+ writel_relaxed(val, ispif->base + ISPIF_VFE_m_IRQ_MASK_2(vfe));
+ writel_relaxed(ISPIF_VFE_m_IRQ_MASK_2_RDI2_ENABLE,
+ ispif->base + ISPIF_VFE_m_IRQ_CLEAR_2(vfe));
+ break;
+ }
+
+ writel(0x1, ispif->base + ISPIF_IRQ_GLOBAL_CLEAR_CMD);
+}
+
+/*
+ * ispif_set_intf_cmd - Set command to enable/disable interface
+ * @ispif: ISPIF device
+ * @cmd: interface command
+ * @intf: VFE interface
+ * @vfe: VFE HW module id
+ * @vc: virtual channel
+ */
+static void ispif_set_intf_cmd(struct ispif_device *ispif, u8 cmd,
+ enum ispif_intf intf, u8 vfe, u8 vc)
+{
+ u32 *val;
+
+ if (intf == RDI2) {
+ val = &ispif->intf_cmd[vfe].cmd_1;
+ *val &= ~(0x3 << (vc * 2 + 8));
+ *val |= (cmd << (vc * 2 + 8));
+ wmb();
+ writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_1(vfe));
+ wmb();
+ } else {
+ val = &ispif->intf_cmd[vfe].cmd_0;
+ *val &= ~(0x3 << (vc * 2 + intf * 8));
+ *val |= (cmd << (vc * 2 + intf * 8));
+ wmb();
+ writel_relaxed(*val, ispif->base + ISPIF_VFE_m_INTF_CMD_0(vfe));
+ wmb();
+ }
+}
+
+/*
+ * ispif_set_stream - Enable/disable streaming on ISPIF module
+ * @sd: ISPIF V4L2 subdevice
+ * @enable: Requested streaming state
+ *
+ * Main configuration of ISPIF module is also done here.
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int ispif_set_stream(struct v4l2_subdev *sd, int enable)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct ispif_device *ispif = to_ispif(line);
+ enum ispif_intf intf = line->interface;
+ u8 csid = line->csid_id;
+ u8 vfe = line->vfe_id;
+ u8 vc = 0; /* Virtual Channel 0 */
+ u8 cid = vc * 4;
+ int ret;
+
+ if (enable) {
+ if (!media_entity_remote_pad(
+ &line->pads[MSM_ISPIF_PAD_SINK])) {
+ return -ENOLINK;
+ }
+
+ /* Config */
+
+ mutex_lock(&ispif->config_lock);
+ ispif_select_clk_mux(ispif, intf, csid, vfe, 1);
+
+ ret = ispif_validate_intf_status(ispif, intf, vfe);
+ if (ret < 0) {
+ mutex_unlock(&ispif->config_lock);
+ return ret;
+ }
+
+ ispif_select_csid(ispif, intf, csid, vfe, 1);
+ ispif_select_cid(ispif, intf, cid, vfe, 1);
+ ispif_config_irq(ispif, intf, vfe, 1);
+ ispif_set_intf_cmd(ispif, CMD_ENABLE_FRAME_BOUNDARY,
+ intf, vfe, vc);
+ } else {
+ mutex_lock(&ispif->config_lock);
+ ispif_set_intf_cmd(ispif, CMD_DISABLE_FRAME_BOUNDARY,
+ intf, vfe, vc);
+ mutex_unlock(&ispif->config_lock);
+
+ ret = ispif_wait_for_stop(ispif, intf, vfe);
+ if (ret < 0)
+ return ret;
+
+ mutex_lock(&ispif->config_lock);
+ ispif_config_irq(ispif, intf, vfe, 0);
+ ispif_select_cid(ispif, intf, cid, vfe, 0);
+ ispif_select_csid(ispif, intf, csid, vfe, 0);
+ ispif_select_clk_mux(ispif, intf, csid, vfe, 0);
+ }
+
+ mutex_unlock(&ispif->config_lock);
+
+ return 0;
+}
+
+/*
+ * __ispif_get_format - Get pointer to format structure
+ * @ispif: ISPIF line
+ * @cfg: V4L2 subdev pad configuration
+ * @pad: pad from which format is requested
+ * @which: TRY or ACTIVE format
+ *
+ * Return pointer to TRY or ACTIVE format structure
+ */
+static struct v4l2_mbus_framefmt *
+__ispif_get_format(struct ispif_line *line,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad,
+ enum v4l2_subdev_format_whence which)
+{
+ if (which == V4L2_SUBDEV_FORMAT_TRY)
+ return v4l2_subdev_get_try_format(&line->subdev, cfg, pad);
+
+ return &line->fmt[pad];
+}
+
+/*
+ * ispif_try_format - Handle try format by pad subdev method
+ * @ispif: ISPIF line
+ * @cfg: V4L2 subdev pad configuration
+ * @pad: pad on which format is requested
+ * @fmt: pointer to v4l2 format structure
+ * @which: wanted subdev format
+ */
+static void ispif_try_format(struct ispif_line *line,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad,
+ struct v4l2_mbus_framefmt *fmt,
+ enum v4l2_subdev_format_whence which)
+{
+ unsigned int i;
+
+ switch (pad) {
+ case MSM_ISPIF_PAD_SINK:
+ /* Set format on sink pad */
+
+ for (i = 0; i < ARRAY_SIZE(ispif_formats); i++)
+ if (fmt->code == ispif_formats[i])
+ break;
+
+ /* If not found, use UYVY as default */
+ if (i >= ARRAY_SIZE(ispif_formats))
+ fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
+
+ fmt->width = clamp_t(u32, fmt->width, 1, 8191);
+ fmt->height = clamp_t(u32, fmt->height, 1, 8191);
+
+ if (fmt->field == V4L2_FIELD_ANY)
+ fmt->field = V4L2_FIELD_NONE;
+
+ break;
+
+ case MSM_ISPIF_PAD_SRC:
+ /* Set and return a format same as sink pad */
+
+ *fmt = *__ispif_get_format(line, cfg, MSM_ISPIF_PAD_SINK,
+ which);
+
+ break;
+ }
+
+ fmt->colorspace = V4L2_COLORSPACE_SRGB;
+}
+
+/*
+ * ispif_enum_mbus_code - Handle pixel format enumeration
+ * @sd: ISPIF V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @code: pointer to v4l2_subdev_mbus_code_enum structure
+ * return -EINVAL or zero on success
+ */
+static int ispif_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ if (code->pad == MSM_ISPIF_PAD_SINK) {
+ if (code->index >= ARRAY_SIZE(ispif_formats))
+ return -EINVAL;
+
+ code->code = ispif_formats[code->index];
+ } else {
+ if (code->index > 0)
+ return -EINVAL;
+
+ format = __ispif_get_format(line, cfg, MSM_ISPIF_PAD_SINK,
+ code->which);
+
+ code->code = format->code;
+ }
+
+ return 0;
+}
+
+/*
+ * ispif_enum_frame_size - Handle frame size enumeration
+ * @sd: ISPIF V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @fse: pointer to v4l2_subdev_frame_size_enum structure
+ * return -EINVAL or zero on success
+ */
+static int ispif_enum_frame_size(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt format;
+
+ if (fse->index != 0)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = 1;
+ format.height = 1;
+ ispif_try_format(line, cfg, fse->pad, &format, fse->which);
+ fse->min_width = format.width;
+ fse->min_height = format.height;
+
+ if (format.code != fse->code)
+ return -EINVAL;
+
+ format.code = fse->code;
+ format.width = -1;
+ format.height = -1;
+ ispif_try_format(line, cfg, fse->pad, &format, fse->which);
+ fse->max_width = format.width;
+ fse->max_height = format.height;
+
+ return 0;
+}
+
+/*
+ * ispif_get_format - Handle get format by pads subdev method
+ * @sd: ISPIF V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @fmt: pointer to v4l2 subdev format structure
+ *
+ * Return -EINVAL or zero on success
+ */
+static int ispif_get_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ispif_get_format(line, cfg, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ fmt->format = *format;
+
+ return 0;
+}
+
+/*
+ * ispif_set_format - Handle set format by pads subdev method
+ * @sd: ISPIF V4L2 subdevice
+ * @cfg: V4L2 subdev pad configuration
+ * @fmt: pointer to v4l2 subdev format structure
+ *
+ * Return -EINVAL or zero on success
+ */
+static int ispif_set_format(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct ispif_line *line = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *format;
+
+ format = __ispif_get_format(line, cfg, fmt->pad, fmt->which);
+ if (format == NULL)
+ return -EINVAL;
+
+ ispif_try_format(line, cfg, fmt->pad, &fmt->format, fmt->which);
+ *format = fmt->format;
+
+ /* Propagate the format from sink to source */
+ if (fmt->pad == MSM_ISPIF_PAD_SINK) {
+ format = __ispif_get_format(line, cfg, MSM_ISPIF_PAD_SRC,
+ fmt->which);
+
+ *format = fmt->format;
+ ispif_try_format(line, cfg, MSM_ISPIF_PAD_SRC, format,
+ fmt->which);
+ }
+
+ return 0;
+}
+
+/*
+ * ispif_init_formats - Initialize formats on all pads
+ * @sd: ISPIF V4L2 subdevice
+ * @fh: V4L2 subdev file handle
+ *
+ * Initialize all pad formats with default values.
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int ispif_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_subdev_format format = {
+ .pad = MSM_ISPIF_PAD_SINK,
+ .which = fh ? V4L2_SUBDEV_FORMAT_TRY :
+ V4L2_SUBDEV_FORMAT_ACTIVE,
+ .format = {
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .width = 1920,
+ .height = 1080
+ }
+ };
+
+ return ispif_set_format(sd, fh ? fh->pad : NULL, &format);
+}
+
+/*
+ * msm_ispif_subdev_init - Initialize ISPIF device structure and resources
+ * @ispif: ISPIF device
+ * @res: ISPIF module resources table
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+int msm_ispif_subdev_init(struct ispif_device *ispif,
+ const struct resources_ispif *res)
+{
+ struct device *dev = to_device(ispif);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct resource *r;
+ int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(ispif->line); i++)
+ ispif->line[i].id = i;
+
+ mutex_init(&ispif->power_lock);
+ ispif->power_count = 0;
+
+ mutex_init(&ispif->config_lock);
+
+ /* Memory */
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[0]);
+ ispif->base = devm_ioremap_resource(dev, r);
+ if (IS_ERR(ispif->base)) {
+ dev_err(dev, "could not map memory\n");
+ return PTR_ERR(ispif->base);
+ }
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_MEM, res->reg[1]);
+ ispif->base_clk_mux = devm_ioremap_resource(dev, r);
+ if (IS_ERR(ispif->base_clk_mux)) {
+ dev_err(dev, "could not map memory\n");
+ return PTR_ERR(ispif->base_clk_mux);
+ }
+
+ /* Interrupt */
+
+ r = platform_get_resource_byname(pdev, IORESOURCE_IRQ, res->interrupt);
+
+ if (!r) {
+ dev_err(dev, "missing IRQ\n");
+ return -EINVAL;
+ }
+
+ ispif->irq = r->start;
+ snprintf(ispif->irq_name, sizeof(ispif->irq_name), "%s_%s",
+ dev_name(dev), MSM_ISPIF_NAME);
+ ret = devm_request_irq(dev, ispif->irq, ispif_isr,
+ IRQF_TRIGGER_RISING, ispif->irq_name, ispif);
+ if (ret < 0) {
+ dev_err(dev, "request_irq failed: %d\n", ret);
+ return ret;
+ }
+
+ /* Clocks */
+
+ ispif->nclocks = 0;
+ while (res->clock[ispif->nclocks])
+ ispif->nclocks++;
+
+ ispif->clock = devm_kzalloc(dev, ispif->nclocks * sizeof(*ispif->clock),
+ GFP_KERNEL);
+ if (!ispif->clock)
+ return -ENOMEM;
+
+ for (i = 0; i < ispif->nclocks; i++) {
+ ispif->clock[i] = devm_clk_get(dev, res->clock[i]);
+ if (IS_ERR(ispif->clock[i]))
+ return PTR_ERR(ispif->clock[i]);
+ }
+
+ ispif->nclocks_for_reset = 0;
+ while (res->clock_for_reset[ispif->nclocks_for_reset])
+ ispif->nclocks_for_reset++;
+
+ ispif->clock_for_reset = devm_kzalloc(dev, ispif->nclocks_for_reset *
+ sizeof(*ispif->clock_for_reset), GFP_KERNEL);
+ if (!ispif->clock_for_reset)
+ return -ENOMEM;
+
+ for (i = 0; i < ispif->nclocks_for_reset; i++) {
+ ispif->clock_for_reset[i] = devm_clk_get(dev,
+ res->clock_for_reset[i]);
+ if (IS_ERR(ispif->clock_for_reset[i]))
+ return PTR_ERR(ispif->clock_for_reset[i]);
+ }
+
+ init_completion(&ispif->reset_complete);
+
+ return 0;
+}
+
+/*
+ * ispif_get_intf - Get ISPIF interface to use by VFE line id
+ * @line_id: VFE line id that the ISPIF line is connected to
+ *
+ * Return ISPIF interface to use
+ */
+static enum ispif_intf ispif_get_intf(enum vfe_line_id line_id)
+{
+ switch (line_id) {
+ case (VFE_LINE_RDI0):
+ return RDI0;
+ case (VFE_LINE_RDI1):
+ return RDI1;
+ case (VFE_LINE_RDI2):
+ return RDI2;
+ default:
+ return RDI0;
+ }
+}
+
+/*
+ * ispif_link_setup - Setup ISPIF connections
+ * @entity: Pointer to media entity structure
+ * @local: Pointer to local pad
+ * @remote: Pointer to remote pad
+ * @flags: Link flags
+ *
+ * Return 0 on success
+ */
+static int ispif_link_setup(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags)
+{
+ if (flags & MEDIA_LNK_FL_ENABLED) {
+ if (media_entity_remote_pad(local))
+ return -EBUSY;
+
+ if (local->flags & MEDIA_PAD_FL_SINK) {
+ struct v4l2_subdev *sd;
+ struct ispif_line *line;
+
+ sd = media_entity_to_v4l2_subdev(entity);
+ line = v4l2_get_subdevdata(sd);
+
+ msm_csid_get_csid_id(remote->entity, &line->csid_id);
+ } else { /* MEDIA_PAD_FL_SOURCE */
+ struct v4l2_subdev *sd;
+ struct ispif_line *line;
+ enum vfe_line_id id;
+
+ sd = media_entity_to_v4l2_subdev(entity);
+ line = v4l2_get_subdevdata(sd);
+
+ msm_vfe_get_vfe_id(remote->entity, &line->vfe_id);
+ msm_vfe_get_vfe_line_id(remote->entity, &id);
+ line->interface = ispif_get_intf(id);
+ }
+ }
+
+ return 0;
+}
+
+static const struct v4l2_subdev_core_ops ispif_core_ops = {
+ .s_power = ispif_set_power,
+};
+
+static const struct v4l2_subdev_video_ops ispif_video_ops = {
+ .s_stream = ispif_set_stream,
+};
+
+static const struct v4l2_subdev_pad_ops ispif_pad_ops = {
+ .enum_mbus_code = ispif_enum_mbus_code,
+ .enum_frame_size = ispif_enum_frame_size,
+ .get_fmt = ispif_get_format,
+ .set_fmt = ispif_set_format,
+};
+
+static const struct v4l2_subdev_ops ispif_v4l2_ops = {
+ .core = &ispif_core_ops,
+ .video = &ispif_video_ops,
+ .pad = &ispif_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops ispif_v4l2_internal_ops = {
+ .open = ispif_init_formats,
+};
+
+static const struct media_entity_operations ispif_media_ops = {
+ .link_setup = ispif_link_setup,
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/*
+ * msm_ispif_register_entities - Register subdev node for ISPIF module
+ * @ispif: ISPIF device
+ * @v4l2_dev: V4L2 device
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+int msm_ispif_register_entities(struct ispif_device *ispif,
+ struct v4l2_device *v4l2_dev)
+{
+ struct device *dev = to_device(ispif);
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ispif->line); i++) {
+ struct v4l2_subdev *sd = &ispif->line[i].subdev;
+ struct media_pad *pads = ispif->line[i].pads;
+
+ v4l2_subdev_init(sd, &ispif_v4l2_ops);
+ sd->internal_ops = &ispif_v4l2_internal_ops;
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ snprintf(sd->name, ARRAY_SIZE(sd->name), "%s%d",
+ MSM_ISPIF_NAME, i);
+ v4l2_set_subdevdata(sd, &ispif->line[i]);
+
+ ret = ispif_init_formats(sd, NULL);
+ if (ret < 0) {
+ dev_err(dev, "Failed to init format: %d\n", ret);
+ goto error;
+ }
+
+ pads[MSM_ISPIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ pads[MSM_ISPIF_PAD_SRC].flags = MEDIA_PAD_FL_SOURCE;
+
+ sd->entity.function = MEDIA_ENT_F_IO_V4L;
+ sd->entity.ops = &ispif_media_ops;
+ ret = media_entity_pads_init(&sd->entity, MSM_ISPIF_PADS_NUM,
+ pads);
+ if (ret < 0) {
+ dev_err(dev, "Failed to init media entity: %d\n", ret);
+ goto error;
+ }
+
+ ret = v4l2_device_register_subdev(v4l2_dev, sd);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register subdev: %d\n", ret);
+ media_entity_cleanup(&sd->entity);
+ goto error;
+ }
+ }
+
+ return 0;
+
+error:
+ for (i--; i >= 0; i--) {
+ struct v4l2_subdev *sd = &ispif->line[i].subdev;
+
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ }
+
+ return ret;
+}
+
+/*
+ * msm_ispif_unregister_entities - Unregister ISPIF module subdev node
+ * @ispif: ISPIF device
+ */
+void msm_ispif_unregister_entities(struct ispif_device *ispif)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ispif->line); i++) {
+ struct v4l2_subdev *sd = &ispif->line[i].subdev;
+
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ }
+}
new file mode 100644
@@ -0,0 +1,85 @@
+/*
+ * camss-ispif.h
+ *
+ * Qualcomm MSM Camera Subsystem - ISPIF Module
+ *
+ * Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.
+ * Copyright (C) 2015-2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef QC_MSM_CAMSS_ISPIF_H
+#define QC_MSM_CAMSS_ISPIF_H
+
+#include <linux/clk.h>
+#include <media/media-entity.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+/* Number of ISPIF lines - same as number of CSID hardware modules */
+#define MSM_ISPIF_LINE_NUM 2
+
+#define MSM_ISPIF_PAD_SINK 0
+#define MSM_ISPIF_PAD_SRC 1
+#define MSM_ISPIF_PADS_NUM 2
+
+#define MSM_ISPIF_VFE_NUM 1
+
+enum ispif_intf {
+ PIX0,
+ RDI0,
+ PIX1,
+ RDI1,
+ RDI2
+};
+
+struct ispif_intf_cmd_reg {
+ u32 cmd_0;
+ u32 cmd_1;
+};
+
+struct ispif_line {
+ u8 id;
+ u8 csid_id;
+ u8 vfe_id;
+ enum ispif_intf interface;
+ struct v4l2_subdev subdev;
+ struct media_pad pads[MSM_ISPIF_PADS_NUM];
+ struct v4l2_mbus_framefmt fmt[MSM_ISPIF_PADS_NUM];
+};
+
+struct ispif_device {
+ void __iomem *base;
+ void __iomem *base_clk_mux;
+ u32 irq;
+ char irq_name[30];
+ struct clk **clock;
+ int nclocks;
+ struct clk **clock_for_reset;
+ int nclocks_for_reset;
+ struct completion reset_complete;
+ int power_count;
+ struct mutex power_lock;
+ struct ispif_intf_cmd_reg intf_cmd[MSM_ISPIF_VFE_NUM];
+ struct mutex config_lock;
+ struct ispif_line line[MSM_ISPIF_LINE_NUM];
+};
+
+struct resources_ispif;
+
+int msm_ispif_subdev_init(struct ispif_device *ispif,
+ const struct resources_ispif *res);
+
+int msm_ispif_register_entities(struct ispif_device *ispif,
+ struct v4l2_device *v4l2_dev);
+
+void msm_ispif_unregister_entities(struct ispif_device *ispif);
+
+#endif /* QC_MSM_CAMSS_ISPIF_H */
These files control the ISPIF module which handles the routing of the data streams from the CSIDs to the inputs of the VFE. Signed-off-by: Todor Tomov <todor.tomov@linaro.org> --- .../media/platform/qcom/camss-8x16/camss-ispif.c | 1127 ++++++++++++++++++++ .../media/platform/qcom/camss-8x16/camss-ispif.h | 85 ++ 2 files changed, 1212 insertions(+) create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-ispif.c create mode 100644 drivers/media/platform/qcom/camss-8x16/camss-ispif.h -- 2.7.4