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/*
* Copyright (C) 2015 Broadcom
*
* 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
* published by the Free Software Foundation.
*/
#include "linux/component.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
#define HVS_REG(reg) { reg, #reg }
static const struct {
u32 reg;
const char *name;
} hvs_regs[] = {
HVS_REG(SCALER_DISPCTRL),
HVS_REG(SCALER_DISPSTAT),
HVS_REG(SCALER_DISPID),
HVS_REG(SCALER_DISPECTRL),
HVS_REG(SCALER_DISPPROF),
HVS_REG(SCALER_DISPDITHER),
HVS_REG(SCALER_DISPEOLN),
HVS_REG(SCALER_DISPLIST0),
HVS_REG(SCALER_DISPLIST1),
HVS_REG(SCALER_DISPLIST2),
HVS_REG(SCALER_DISPLSTAT),
HVS_REG(SCALER_DISPLACT0),
HVS_REG(SCALER_DISPLACT1),
HVS_REG(SCALER_DISPLACT2),
HVS_REG(SCALER_DISPCTRL0),
HVS_REG(SCALER_DISPBKGND0),
HVS_REG(SCALER_DISPSTAT0),
HVS_REG(SCALER_DISPBASE0),
HVS_REG(SCALER_DISPCTRL1),
HVS_REG(SCALER_DISPBKGND1),
HVS_REG(SCALER_DISPSTAT1),
HVS_REG(SCALER_DISPBASE1),
HVS_REG(SCALER_DISPCTRL2),
HVS_REG(SCALER_DISPBKGND2),
HVS_REG(SCALER_DISPSTAT2),
HVS_REG(SCALER_DISPBASE2),
HVS_REG(SCALER_DISPALPHA2),
};
void
vc4_hvs_dump_state(struct drm_device *dev)
{
struct vc4_dev *vc4 = to_vc4_dev(dev);
int i;
rmb();
for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) {
DRM_INFO("0x%04x (%s): 0x%08x\n",
hvs_regs[i].reg, hvs_regs[i].name,
HVS_READ(hvs_regs[i].reg));
}
DRM_INFO("HVS ctx:\n");
for (i = 0; i < 64; i += 4) {
DRM_INFO("0x%08x (%s): 0x%08x 0x%08x 0x%08x 0x%08x\n",
i * 4, i < HVS_BOOTLOADER_DLIST_END ? "B" : "D",
((uint32_t *)vc4->hvs->dlist)[i + 0],
((uint32_t *)vc4->hvs->dlist)[i + 1],
((uint32_t *)vc4->hvs->dlist)[i + 2],
((uint32_t *)vc4->hvs->dlist)[i + 3]);
}
}
static irqreturn_t vc4_hvs_irq_handler(int irq, void *data)
{
struct vc4_dev *vc4 = data;
u32 stat = HVS_READ(SCALER_DISPSTAT);
u32 irq_bits = stat & (SCALER_DISPSTAT_IRQSCL |
SCALER_DISPSTAT_IRQDISP0 |
SCALER_DISPSTAT_IRQDISP1 |
SCALER_DISPSTAT_IRQDISP2 |
SCALER_DISPSTAT_IRQSLVWR |
SCALER_DISPSTAT_IRQSLVRD);
irqreturn_t ret = IRQ_NONE;
if (irq_bits != 0) {
DRM_ERROR("HVS reported error: SCALER_DISPSTAT = 0x%08x\n",
stat);
/* Mask out whichever of the interrupt enable generated our
* interrupt, so that the error only appears once for this
* type of error
*/
HVS_WRITE(SCALER_DISPCTRL,
HVS_READ(SCALER_DISPCTRL) & ~irq_bits);
ret = IRQ_HANDLED;
}
return ret;
}
#ifdef CONFIG_DEBUG_FS
int vc4_hvs_debugfs_regs(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *) m->private;
struct drm_device *dev = node->minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
int i;
for (i = 0; i < ARRAY_SIZE(hvs_regs); i++) {
seq_printf(m, "%s (0x%04x): 0x%08x\n",
hvs_regs[i].name, hvs_regs[i].reg,
HVS_READ(hvs_regs[i].reg));
}
return 0;
}
#endif
static int vc4_hvs_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = drm->dev_private;
struct vc4_hvs *hvs = NULL;
int ret;
hvs = devm_kzalloc(&pdev->dev, sizeof(*hvs), GFP_KERNEL);
if (!hvs)
return -ENOMEM;
hvs->pdev = pdev;
hvs->regs = vc4_ioremap_regs(pdev, 0);
if (IS_ERR(hvs->regs))
return PTR_ERR(hvs->regs);
hvs->dlist = hvs->regs + SCALER_DLIST_START;
vc4->hvs = hvs;
/* Disable any interrupts set by the firmware. */
HVS_WRITE(SCALER_DISPCTRL, SCALER_DISPCTRL_ENABLE);
/* Clear any previous interrupts. */
HVS_WRITE(SCALER_DISPSTAT, SCALER_DISPSTAT_IRQSCL);
ret = devm_request_irq(dev, platform_get_irq(pdev, 0),
vc4_hvs_irq_handler, 0, "vc4 hvs", vc4);
if (ret)
return ret;
/* Turn on a bunch of interrupts for catching HW setup errors. */
HVS_WRITE(SCALER_DISPCTRL,
SCALER_DISPCTRL_ENABLE |
SCALER_DISPCTRL_DSP0EISLUR |
SCALER_DISPCTRL_DSP1EISLUR |
SCALER_DISPCTRL_DSP2EISLUR |
SCALER_DISPCTRL_SLVRDEIRQ |
SCALER_DISPCTRL_SLVWREIRQ |
SCALER_DISPCTRL_DMAEIRQ |
SCALER_DISPCTRL_DISP0EIRQ |
SCALER_DISPCTRL_DISP1EIRQ |
SCALER_DISPCTRL_DISP2EIRQ);
return 0;
}
static void vc4_hvs_unbind(struct device *dev, struct device *master,
void *data)
{
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = drm->dev_private;
HVS_WRITE(SCALER_DISPCTRL, SCALER_DISPCTRL_ENABLE);
HVS_WRITE(SCALER_DISPSTAT, SCALER_DISPSTAT_IRQSCL);
vc4->hvs = NULL;
}
static const struct component_ops vc4_hvs_ops = {
.bind = vc4_hvs_bind,
.unbind = vc4_hvs_unbind,
};
static int vc4_hvs_dev_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vc4_hvs_ops);
}
static int vc4_hvs_dev_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vc4_hvs_ops);
return 0;
}
static const struct of_device_id vc4_hvs_dt_match[] = {
{ .compatible = "brcm,vc4-hvs" },
{}
};
static struct platform_driver vc4_hvs_driver = {
.probe = vc4_hvs_dev_probe,
.remove = vc4_hvs_dev_remove,
.driver = {
.name = "vc4_hvs",
.of_match_table = vc4_hvs_dt_match,
},
};
void __init vc4_hvs_register(void)
{
platform_driver_register(&vc4_hvs_driver);
}
void __exit vc4_hvs_unregister(void)
{
platform_driver_unregister(&vc4_hvs_driver);
}
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