--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * camss-vfe-480.c
+ *
+ * Qualcomm MSM Camera Subsystem - VFE (Video Front End) Module v480 (SM8250)
+ *
+ * Copyright (C) 2020-2021 Linaro Ltd.
+ * Copyright (C) 2021 Jonathan Marek
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+
+#include "camss.h"
+#include "camss-vfe.h"
+
+/* VFE 2/3 are lite and have a different register layout */
+#define IS_LITE (vfe->id >= 2 ? 1 : 0)
+
+#define VFE_HW_VERSION (0x00)
+
+#define VFE_GLOBAL_RESET_CMD (IS_LITE ? 0x0c : 0x1c)
+#define GLOBAL_RESET_HW_AND_REG (IS_LITE ? BIT(1) : BIT(0))
+
+#define VFE_REG_UPDATE_CMD (IS_LITE ? 0x20 : 0x34)
+static inline int reg_update_rdi(struct vfe_device *vfe, int n)
+{
+ return IS_LITE ? BIT(n) : BIT(1 + (n));
+}
+
+#define REG_UPDATE_RDI reg_update_rdi
+#define VFE_IRQ_CMD (IS_LITE ? 0x24 : 0x38)
+#define IRQ_CMD_GLOBAL_CLEAR BIT(0)
+
+#define VFE_IRQ_MASK(n) ((IS_LITE ? 0x28 : 0x3c) + (n) * 4)
+#define IRQ_MASK_0_RESET_ACK (IS_LITE ? BIT(17) : BIT(0))
+#define IRQ_MASK_0_BUS_TOP_IRQ (IS_LITE ? BIT(4) : BIT(7))
+#define VFE_IRQ_CLEAR(n) ((IS_LITE ? 0x34 : 0x48) + (n) * 4)
+#define VFE_IRQ_STATUS(n) ((IS_LITE ? 0x40 : 0x54) + (n) * 4)
+
+#define BUS_REG_BASE (IS_LITE ? 0x1a00 : 0xaa00)
+
+#define VFE_BUS_WM_CGC_OVERRIDE (BUS_REG_BASE + 0x08)
+#define WM_CGC_OVERRIDE_ALL (0x3FFFFFF)
+
+#define VFE_BUS_WM_TEST_BUS_CTRL (BUS_REG_BASE + 0xdc)
+
+#define VFE_BUS_IRQ_MASK(n) (BUS_REG_BASE + 0x18 + (n) * 4)
+static inline int bus_irq_mask_0_rdi_rup(struct vfe_device *vfe, int n)
+{
+ return IS_LITE ? BIT(n) : BIT(3 + (n));
+}
+
+#define BUS_IRQ_MASK_0_RDI_RUP bus_irq_mask_0_rdi_rup
+static inline int bus_irq_mask_0_comp_done(struct vfe_device *vfe, int n)
+{
+ return IS_LITE ? BIT(4 + (n)) : BIT(6 + (n));
+}
+
+#define BUS_IRQ_MASK_0_COMP_DONE bus_irq_mask_0_comp_done
+#define VFE_BUS_IRQ_CLEAR(n) (BUS_REG_BASE + 0x20 + (n) * 4)
+#define VFE_BUS_IRQ_STATUS(n) (BUS_REG_BASE + 0x28 + (n) * 4)
+#define VFE_BUS_IRQ_CLEAR_GLOBAL (BUS_REG_BASE + 0x30)
+
+#define VFE_BUS_WM_CFG(n) (BUS_REG_BASE + 0x200 + (n) * 0x100)
+#define WM_CFG_EN (0)
+#define WM_CFG_MODE (16)
+#define MODE_QCOM_PLAIN (0)
+#define MODE_MIPI_RAW (1)
+#define VFE_BUS_WM_IMAGE_ADDR(n) (BUS_REG_BASE + 0x204 + (n) * 0x100)
+#define VFE_BUS_WM_FRAME_INCR(n) (BUS_REG_BASE + 0x208 + (n) * 0x100)
+#define VFE_BUS_WM_IMAGE_CFG_0(n) (BUS_REG_BASE + 0x20c + (n) * 0x100)
+#define WM_IMAGE_CFG_0_DEFAULT_WIDTH (0xFFFF)
+#define VFE_BUS_WM_IMAGE_CFG_1(n) (BUS_REG_BASE + 0x210 + (n) * 0x100)
+#define VFE_BUS_WM_IMAGE_CFG_2(n) (BUS_REG_BASE + 0x214 + (n) * 0x100)
+#define VFE_BUS_WM_PACKER_CFG(n) (BUS_REG_BASE + 0x218 + (n) * 0x100)
+#define VFE_BUS_WM_HEADER_ADDR(n) (BUS_REG_BASE + 0x220 + (n) * 0x100)
+#define VFE_BUS_WM_HEADER_INCR(n) (BUS_REG_BASE + 0x224 + (n) * 0x100)
+#define VFE_BUS_WM_HEADER_CFG(n) (BUS_REG_BASE + 0x228 + (n) * 0x100)
+
+#define VFE_BUS_WM_IRQ_SUBSAMPLE_PERIOD(n) (BUS_REG_BASE + 0x230 + (n) * 0x100)
+#define VFE_BUS_WM_IRQ_SUBSAMPLE_PATTERN(n) (BUS_REG_BASE + 0x234 + (n) * 0x100)
+#define VFE_BUS_WM_FRAMEDROP_PERIOD(n) (BUS_REG_BASE + 0x238 + (n) * 0x100)
+#define VFE_BUS_WM_FRAMEDROP_PATTERN(n) (BUS_REG_BASE + 0x23c + (n) * 0x100)
+
+#define VFE_BUS_WM_SYSTEM_CACHE_CFG(n) (BUS_REG_BASE + 0x260 + (n) * 0x100)
+#define VFE_BUS_WM_BURST_LIMIT(n) (BUS_REG_BASE + 0x264 + (n) * 0x100)
+
+/* for titan 480, each bus client is hardcoded to a specific path
+ * and each bus client is part of a hardcoded "comp group"
+ */
+#define RDI_WM(n) ((IS_LITE ? 0 : 23) + (n))
+#define RDI_COMP_GROUP(n) ((IS_LITE ? 0 : 11) + (n))
+
+static u32 vfe_hw_version(struct vfe_device *vfe)
+{
+ u32 hw_version = readl_relaxed(vfe->base + VFE_HW_VERSION);
+
+ u32 gen = (hw_version >> 28) & 0xF;
+ u32 rev = (hw_version >> 16) & 0xFFF;
+ u32 step = hw_version & 0xFFFF;
+
+ dev_dbg(vfe->camss->dev, "VFE HW Version = %u.%u.%u\n", gen, rev, step);
+
+ return hw_version;
+}
+
+static void vfe_global_reset(struct vfe_device *vfe)
+{
+ writel_relaxed(IRQ_MASK_0_RESET_ACK, vfe->base + VFE_IRQ_MASK(0));
+ writel_relaxed(GLOBAL_RESET_HW_AND_REG, vfe->base + VFE_GLOBAL_RESET_CMD);
+}
+
+static void vfe_wm_start(struct vfe_device *vfe, u8 wm, struct vfe_line *line)
+{
+ struct v4l2_pix_format_mplane *pix =
+ &line->video_out.active_fmt.fmt.pix_mp;
+
+ wm = RDI_WM(wm); /* map to actual WM used (from wm=RDI index) */
+
+ /* no clock gating at bus input */
+ writel_relaxed(WM_CGC_OVERRIDE_ALL, vfe->base + VFE_BUS_WM_CGC_OVERRIDE);
+
+ writel_relaxed(0x0, vfe->base + VFE_BUS_WM_TEST_BUS_CTRL);
+
+ writel_relaxed(pix->plane_fmt[0].bytesperline * pix->height,
+ vfe->base + VFE_BUS_WM_FRAME_INCR(wm));
+ writel_relaxed(0xf, vfe->base + VFE_BUS_WM_BURST_LIMIT(wm));
+ writel_relaxed(WM_IMAGE_CFG_0_DEFAULT_WIDTH,
+ vfe->base + VFE_BUS_WM_IMAGE_CFG_0(wm));
+ writel_relaxed(pix->plane_fmt[0].bytesperline,
+ vfe->base + VFE_BUS_WM_IMAGE_CFG_2(wm));
+ writel_relaxed(0, vfe->base + VFE_BUS_WM_PACKER_CFG(wm));
+
+ /* no dropped frames, one irq per frame */
+ writel_relaxed(0, vfe->base + VFE_BUS_WM_FRAMEDROP_PERIOD(wm));
+ writel_relaxed(1, vfe->base + VFE_BUS_WM_FRAMEDROP_PATTERN(wm));
+ writel_relaxed(0, vfe->base + VFE_BUS_WM_IRQ_SUBSAMPLE_PERIOD(wm));
+ writel_relaxed(1, vfe->base + VFE_BUS_WM_IRQ_SUBSAMPLE_PATTERN(wm));
+
+ writel_relaxed(1 << WM_CFG_EN | MODE_MIPI_RAW << WM_CFG_MODE,
+ vfe->base + VFE_BUS_WM_CFG(wm));
+}
+
+static void vfe_wm_stop(struct vfe_device *vfe, u8 wm)
+{
+ wm = RDI_WM(wm); /* map to actual WM used (from wm=RDI index) */
+ writel_relaxed(0, vfe->base + VFE_BUS_WM_CFG(wm));
+}
+
+static void vfe_wm_update(struct vfe_device *vfe, u8 wm, u32 addr,
+ struct vfe_line *line)
+{
+ wm = RDI_WM(wm); /* map to actual WM used (from wm=RDI index) */
+ writel_relaxed(addr, vfe->base + VFE_BUS_WM_IMAGE_ADDR(wm));
+}
+
+static void vfe_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id)
+{
+ vfe->reg_update |= REG_UPDATE_RDI(vfe, line_id);
+ writel_relaxed(vfe->reg_update, vfe->base + VFE_REG_UPDATE_CMD);
+}
+
+static inline void vfe_reg_update_clear(struct vfe_device *vfe,
+ enum vfe_line_id line_id)
+{
+ vfe->reg_update &= ~REG_UPDATE_RDI(vfe, line_id);
+}
+
+static void vfe_enable_irq_common(struct vfe_device *vfe)
+{
+ /* enable only the IRQs used: rup and comp_done irqs for RDI0 */
+ writel_relaxed(IRQ_MASK_0_RESET_ACK | IRQ_MASK_0_BUS_TOP_IRQ,
+ vfe->base + VFE_IRQ_MASK(0));
+ writel_relaxed(BUS_IRQ_MASK_0_RDI_RUP(vfe, 0) |
+ BUS_IRQ_MASK_0_COMP_DONE(vfe, RDI_COMP_GROUP(0)),
+ vfe->base + VFE_BUS_IRQ_MASK(0));
+}
+
+static void vfe_isr_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id);
+static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm);
+
+/*
+ * vfe_isr - VFE module interrupt handler
+ * @irq: Interrupt line
+ * @dev: VFE device
+ *
+ * Return IRQ_HANDLED on success
+ */
+static irqreturn_t vfe_isr(int irq, void *dev)
+{
+ struct vfe_device *vfe = dev;
+ u32 status;
+
+ status = readl_relaxed(vfe->base + VFE_IRQ_STATUS(0));
+ writel_relaxed(status, vfe->base + VFE_IRQ_CLEAR(0));
+ writel_relaxed(IRQ_CMD_GLOBAL_CLEAR, vfe->base + VFE_IRQ_CMD);
+
+ if (status & IRQ_MASK_0_RESET_ACK)
+ vfe_isr_reset_ack(vfe);
+
+ if (status & IRQ_MASK_0_BUS_TOP_IRQ) {
+ u32 status = readl_relaxed(vfe->base + VFE_BUS_IRQ_STATUS(0));
+
+ writel_relaxed(status, vfe->base + VFE_BUS_IRQ_CLEAR(0));
+ writel_relaxed(1, vfe->base + VFE_BUS_IRQ_CLEAR_GLOBAL);
+
+ if (status & BUS_IRQ_MASK_0_RDI_RUP(vfe, 0))
+ vfe_isr_reg_update(vfe, 0);
+
+ if (status & BUS_IRQ_MASK_0_COMP_DONE(vfe, RDI_COMP_GROUP(0)))
+ vfe_isr_wm_done(vfe, 0);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * vfe_halt - Trigger halt on VFE module and wait to complete
+ * @vfe: VFE device
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int vfe_halt(struct vfe_device *vfe)
+{
+ /* rely on vfe_disable_output() to stop the VFE */
+ return 0;
+}
+
+static int vfe_get_output(struct vfe_line *line)
+{
+ struct vfe_device *vfe = to_vfe(line);
+ struct vfe_output *output;
+ unsigned long flags;
+ int wm_idx;
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+
+ output = &line->output;
+ if (output->state != VFE_OUTPUT_OFF) {
+ dev_err(vfe->camss->dev, "Output is running\n");
+ goto error;
+ }
+
+ output->wm_num = 1;
+
+ wm_idx = vfe_reserve_wm(vfe, line->id);
+ if (wm_idx < 0) {
+ dev_err(vfe->camss->dev, "Can not reserve wm\n");
+ goto error_get_wm;
+ }
+ output->wm_idx[0] = wm_idx;
+
+ output->drop_update_idx = 0;
+
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ return 0;
+
+error_get_wm:
+ vfe_release_wm(vfe, output->wm_idx[0]);
+ output->state = VFE_OUTPUT_OFF;
+error:
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ return -EINVAL;
+}
+
+static int vfe_enable_output(struct vfe_line *line)
+{
+ struct vfe_device *vfe = to_vfe(line);
+ struct vfe_output *output = &line->output;
+ unsigned long flags;
+ unsigned int i;
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+
+ vfe_reg_update_clear(vfe, line->id);
+
+ if (output->state != VFE_OUTPUT_OFF) {
+ dev_err(vfe->camss->dev, "Output is not in reserved state %d\n",
+ output->state);
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+ return -EINVAL;
+ }
+
+ WARN_ON(output->gen2.active_num);
+
+ output->state = VFE_OUTPUT_ON;
+
+ output->sequence = 0;
+ output->wait_reg_update = 0;
+ reinit_completion(&output->reg_update);
+
+ vfe_wm_start(vfe, output->wm_idx[0], line);
+
+ for (i = 0; i < 2; i++) {
+ output->buf[i] = vfe_buf_get_pending(output);
+ if (!output->buf[i])
+ break;
+ output->gen2.active_num++;
+ vfe_wm_update(vfe, output->wm_idx[0], output->buf[i]->addr[0], line);
+ }
+
+ vfe_reg_update(vfe, line->id);
+
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ return 0;
+}
+
+static int vfe_disable_output(struct vfe_line *line)
+{
+ struct vfe_device *vfe = to_vfe(line);
+ struct vfe_output *output = &line->output;
+ unsigned long flags;
+ unsigned int i;
+ bool done;
+ int timeout = 0;
+
+ do {
+ spin_lock_irqsave(&vfe->output_lock, flags);
+ done = !output->gen2.active_num;
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+ usleep_range(10000, 20000);
+
+ if (timeout++ == 100) {
+ dev_err(vfe->camss->dev, "VFE idle timeout - resetting\n");
+ vfe_reset(vfe);
+ output->gen2.active_num = 0;
+ return 0;
+ }
+ } while (!done);
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+ for (i = 0; i < output->wm_num; i++)
+ vfe_wm_stop(vfe, output->wm_idx[i]);
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ return 0;
+}
+
+/*
+ * vfe_enable - Enable streaming on VFE line
+ * @line: VFE line
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int vfe_enable(struct vfe_line *line)
+{
+ struct vfe_device *vfe = to_vfe(line);
+ int ret;
+
+ mutex_lock(&vfe->stream_lock);
+
+ if (!vfe->stream_count)
+ vfe_enable_irq_common(vfe);
+
+ vfe->stream_count++;
+
+ mutex_unlock(&vfe->stream_lock);
+
+ ret = vfe_get_output(line);
+ if (ret < 0)
+ goto error_get_output;
+
+ ret = vfe_enable_output(line);
+ if (ret < 0)
+ goto error_enable_output;
+
+ vfe->was_streaming = 1;
+
+ return 0;
+
+error_enable_output:
+ vfe_put_output(line);
+
+error_get_output:
+ mutex_lock(&vfe->stream_lock);
+
+ vfe->stream_count--;
+
+ mutex_unlock(&vfe->stream_lock);
+
+ return ret;
+}
+
+/*
+ * vfe_disable - Disable streaming on VFE line
+ * @line: VFE line
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int vfe_disable(struct vfe_line *line)
+{
+ struct vfe_device *vfe = to_vfe(line);
+
+ vfe_disable_output(line);
+
+ vfe_put_output(line);
+
+ mutex_lock(&vfe->stream_lock);
+
+ vfe->stream_count--;
+
+ mutex_unlock(&vfe->stream_lock);
+
+ return 0;
+}
+
+/*
+ * vfe_isr_reg_update - Process reg update interrupt
+ * @vfe: VFE Device
+ * @line_id: VFE line
+ */
+static void vfe_isr_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id)
+{
+ struct vfe_output *output;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+ vfe_reg_update_clear(vfe, line_id);
+
+ output = &vfe->line[line_id].output;
+
+ if (output->wait_reg_update) {
+ output->wait_reg_update = 0;
+ complete(&output->reg_update);
+ }
+
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+}
+
+/*
+ * vfe_isr_wm_done - Process write master done interrupt
+ * @vfe: VFE Device
+ * @wm: Write master id
+ */
+static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm)
+{
+ struct vfe_line *line = &vfe->line[vfe->wm_output_map[wm]];
+ struct camss_buffer *ready_buf;
+ struct vfe_output *output;
+ unsigned long flags;
+ u32 index;
+ u64 ts = ktime_get_ns();
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+
+ if (vfe->wm_output_map[wm] == VFE_LINE_NONE) {
+ dev_err_ratelimited(vfe->camss->dev,
+ "Received wm done for unmapped index\n");
+ goto out_unlock;
+ }
+ output = &vfe->line[vfe->wm_output_map[wm]].output;
+
+ ready_buf = output->buf[0];
+ if (!ready_buf) {
+ dev_err_ratelimited(vfe->camss->dev,
+ "Missing ready buf %d!\n", output->state);
+ goto out_unlock;
+ }
+
+ ready_buf->vb.vb2_buf.timestamp = ts;
+ ready_buf->vb.sequence = output->sequence++;
+
+ index = 0;
+ output->buf[0] = output->buf[1];
+ if (output->buf[0])
+ index = 1;
+
+ output->buf[index] = vfe_buf_get_pending(output);
+
+ if (output->buf[index])
+ vfe_wm_update(vfe, output->wm_idx[0], output->buf[index]->addr[0], line);
+ else
+ output->gen2.active_num--;
+
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ vb2_buffer_done(&ready_buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
+
+ return;
+
+out_unlock:
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+}
+
+/*
+ * vfe_pm_domain_off - Disable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+static void vfe_pm_domain_off(struct vfe_device *vfe)
+{
+ /* nop */
+}
+
+/*
+ * vfe_pm_domain_on - Enable power domains specific to this VFE.
+ * @vfe: VFE Device
+ */
+static int vfe_pm_domain_on(struct vfe_device *vfe)
+{
+ return 0;
+}
+
+/*
+ * vfe_queue_buffer - Add empty buffer
+ * @vid: Video device structure
+ * @buf: Buffer to be enqueued
+ *
+ * Add an empty buffer - depending on the current number of buffers it will be
+ * put in pending buffer queue or directly given to the hardware to be filled.
+ *
+ * Return 0 on success or a negative error code otherwise
+ */
+static int vfe_queue_buffer(struct camss_video *vid,
+ struct camss_buffer *buf)
+{
+ struct vfe_line *line = container_of(vid, struct vfe_line, video_out);
+ struct vfe_device *vfe = to_vfe(line);
+ struct vfe_output *output;
+ unsigned long flags;
+
+ output = &line->output;
+
+ spin_lock_irqsave(&vfe->output_lock, flags);
+
+ if (output->state == VFE_OUTPUT_ON && output->gen2.active_num < 2) {
+ output->buf[output->gen2.active_num++] = buf;
+ vfe_wm_update(vfe, output->wm_idx[0], buf->addr[0], line);
+ } else {
+ vfe_buf_add_pending(output, buf);
+ }
+
+ spin_unlock_irqrestore(&vfe->output_lock, flags);
+
+ return 0;
+}
+
+static const struct camss_video_ops vfe_video_ops_480 = {
+ .queue_buffer = vfe_queue_buffer,
+ .flush_buffers = vfe_flush_buffers,
+};
+
+static void vfe_subdev_init(struct device *dev, struct vfe_device *vfe)
+{
+ vfe->video_ops = vfe_video_ops_480;
+ vfe->line_num = 1;
+}
+
+const struct vfe_hw_ops vfe_ops_480 = {
+ .global_reset = vfe_global_reset,
+ .hw_version = vfe_hw_version,
+ .isr = vfe_isr,
+ .pm_domain_off = vfe_pm_domain_off,
+ .pm_domain_on = vfe_pm_domain_on,
+ .subdev_init = vfe_subdev_init,
+ .vfe_disable = vfe_disable,
+ .vfe_enable = vfe_enable,
+ .vfe_halt = vfe_halt,
+};
projects / platform / kernel / linux-rpi.git / commitdiff