static void hist_enable(struct ispstat *hist, int enable)
{
if (enable) {
isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,
ISPHIST_PCR_ENABLE);
isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
ISPCTRL_HIST_CLK_EN);
} else {
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,
ISPHIST_PCR_ENABLE);
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_MAIN, ISP_CTRL,
ISPCTRL_HIST_CLK_EN);
}
}
/*
* ispccp2_if_enable - Enable CCP2 interface.
* @ccp2: pointer to ISP CCP2 device
* @enable: enable/disable flag
*/
static void ispccp2_if_enable(struct isp_ccp2_device *ccp2, u8 enable)
{
struct isp_device *isp = to_isp_device(ccp2);
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
int i;
if (enable && ccp2->vdds_csib)
regulator_enable(ccp2->vdds_csib);
/* Enable/Disable all the LCx channels */
for (i = 0; i < CCP2_LCx_CHANS_NUM; i++)
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_CTRL(i),
ISPCCP2_LCx_CTRL_CHAN_EN,
enable ? ISPCCP2_LCx_CTRL_CHAN_EN : 0);
/* Enable/Disable ccp2 interface in ccp2 mode */
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL,
ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN,
enable ? (ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN) : 0);
/* For frame count propagation */
if (pipe->do_propagation) {
/* We may want the Frame Start IRQ from LC0 */
if (enable)
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQENABLE,
ISPCCP2_LC01_IRQSTATUS_LC0_FS_IRQ);
else
isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQENABLE,
ISPCCP2_LC01_IRQSTATUS_LC0_FS_IRQ);
}
if (!enable && ccp2->vdds_csib)
regulator_disable(ccp2->vdds_csib);
}
static int hist_buf_pio(struct ispstat *hist)
{
struct isp_device *isp = hist->isp;
u32 *buf = hist->active_buf->virt_addr;
unsigned int i;
if (!buf) {
dev_dbg(isp->dev, "hist: invalid PIO buffer address\n");
hist_reset_mem(hist);
return STAT_NO_BUF;
}
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
isp_reg_set(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
for (i = hist->buf_size / 16; i > 0; i--) {
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
}
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,
ISPHIST_CNT_CLEAR);
return STAT_BUF_DONE;
}
/*
* hist_reset_mem - clear Histogram memory before start stats engine.
*/
static void hist_reset_mem(struct ispstat *hist)
{
struct isp_device *isp = hist->isp;
struct omap3isp_hist_config *conf = hist->priv;
unsigned int i;
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
/*
* By setting it, the histogram internal buffer is being cleared at the
* same time it's being read. This bit must be cleared afterwards.
*/
isp_reg_set(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
/*
* We'll clear 4 words at each iteration for optimization. It avoids
* 3/4 of the jumps. We also know HIST_MEM_SIZE is divisible by 4.
*/
for (i = OMAP3ISP_HIST_MEM_SIZE / 4; i > 0; i--) {
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
}
isp_reg_clr(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
hist->wait_acc_frames = conf->num_acc_frames;
}
static int hist_buf_dma(struct ispstat *hist)
{
dma_addr_t dma_addr = hist->active_buf->dma_addr;
struct dma_async_tx_descriptor *tx;
struct dma_slave_config cfg;
dma_cookie_t cookie;
int ret;
if (unlikely(!dma_addr)) {
dev_dbg(hist->isp->dev, "hist: invalid DMA buffer address\n");
goto error;
}
isp_reg_writel(hist->isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,
ISPHIST_CNT_CLEAR);
omap3isp_flush(hist->isp);
memset(&cfg, 0, sizeof(cfg));
cfg.src_addr = hist->isp->mmio_hist_base_phys + ISPHIST_DATA;
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
cfg.src_maxburst = hist->buf_size / 4;
ret = dmaengine_slave_config(hist->dma_ch, &cfg);
if (ret < 0) {
dev_dbg(hist->isp->dev,
"hist: DMA slave configuration failed\n");
goto error;
}
tx = dmaengine_prep_slave_single(hist->dma_ch, dma_addr,
hist->buf_size, DMA_DEV_TO_MEM,
DMA_CTRL_ACK);
if (tx == NULL) {
dev_dbg(hist->isp->dev,
"hist: DMA slave preparation failed\n");
goto error;
}
tx->callback = hist_dma_cb;
tx->callback_param = hist;
cookie = tx->tx_submit(tx);
if (dma_submit_error(cookie)) {
dev_dbg(hist->isp->dev, "hist: DMA submission failed\n");
goto error;
}
dma_async_issue_pending(hist->dma_ch);
return STAT_BUF_WAITING_DMA;
error:
hist_reset_mem(hist);
return STAT_NO_BUF;
}
static void hist_enable(struct ispstat *hist, int enable)
{
if (enable) {
isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,
ISPHIST_PCR_ENABLE);
omap3isp_subclk_enable(hist->isp, OMAP3_ISP_SUBCLK_HIST);
} else {
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_PCR,
ISPHIST_PCR_ENABLE);
omap3isp_subclk_disable(hist->isp, OMAP3_ISP_SUBCLK_HIST);
}
}
/*
* csi2_irq_ctx_set - Enables CSI2 Context IRQs.
* @enable: Enable/disable CSI2 Context interrupts
*/
static void csi2_irq_ctx_set(struct isp_device *isp,
struct isp_csi2_device *csi2, int enable)
{
int i;
for (i = 0; i < 8; i++) {
isp_reg_writel(isp, ISPCSI2_CTX_IRQSTATUS_FE_IRQ, csi2->regs1,
ISPCSI2_CTX_IRQSTATUS(i));
if (enable)
isp_reg_set(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
else
isp_reg_clr(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
ISPCSI2_CTX_IRQSTATUS_FE_IRQ);
}
}
/*
* ispccp2_reset - Reset the CCP2
* @ccp2: pointer to ISP CCP2 device
*/
static void ispccp2_reset(struct isp_ccp2_device *ccp2)
{
struct isp_device *isp = to_isp_device(ccp2);
int i = 0;
/* Reset the CSI1/CCP2B and wait for reset to complete */
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSCONFIG,
ISPCCP2_SYSCONFIG_SOFT_RESET);
while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSSTATUS) &
ISPCCP2_SYSSTATUS_RESET_DONE)) {
udelay(10);
if (i++ > 10) { /* try read 10 times */
dev_warn(isp->dev,
"omap3_isp: timeout waiting for ccp2 reset\n");
break;
}
}
}
static void ccp2_reset(struct isp_ccp2_device *ccp2)
{
struct isp_device *isp = to_isp_device(ccp2);
int i = 0;
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSCONFIG,
ISPCCP2_SYSCONFIG_SOFT_RESET);
while (!(isp_reg_readl(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_SYSSTATUS) &
ISPCCP2_SYSSTATUS_RESET_DONE)) {
udelay(10);
if (i++ > 10) {
dev_warn(isp->dev,
"omap3_isp: timeout waiting for ccp2 reset\n");
break;
}
}
}
/*
* isp_csi2_irq_ctx_set - Enables CSI2 Context IRQs.
* @enable: Enable/disable CSI2 Context interrupts
*/
static void isp_csi2_irq_ctx_set(struct isp_device *isp,
struct isp_csi2_device *csi2, int enable)
{
u32 reg = ISPCSI2_CTX_IRQSTATUS_FE_IRQ;
int i;
if (csi2->use_fs_irq)
reg |= ISPCSI2_CTX_IRQSTATUS_FS_IRQ;
for (i = 0; i < 8; i++) {
isp_reg_writel(isp, reg, csi2->regs1,
ISPCSI2_CTX_IRQSTATUS(i));
if (enable)
isp_reg_set(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
reg);
else
isp_reg_clr(isp, csi2->regs1, ISPCSI2_CTX_IRQENABLE(i),
reg);
}
}
static void hist_reset_mem(struct ispstat *hist)
{
struct isp_device *isp = hist->isp;
struct omap3isp_hist_config *conf = hist->priv;
unsigned int i;
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
isp_reg_set(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
for (i = OMAP3ISP_HIST_MEM_SIZE / 4; i > 0; i--) {
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
}
isp_reg_clr(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
hist->wait_acc_frames = conf->num_acc_frames;
}
static int hist_buf_dma(struct ispstat *hist)
{
dma_addr_t dma_addr = hist->active_buf->dma_addr;
if (unlikely(!dma_addr)) {
dev_dbg(hist->isp->dev, "hist: invalid DMA buffer address\n");
hist_reset_mem(hist);
return STAT_NO_BUF;
}
isp_reg_writel(hist->isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
isp_reg_set(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,
ISPHIST_CNT_CLEAR);
omap3isp_flush(hist->isp);
hist->dma_config.dst_start = dma_addr;
hist->dma_config.elem_count = hist->buf_size / sizeof(u32);
omap_set_dma_params(hist->dma_ch, &hist->dma_config);
omap_start_dma(hist->dma_ch);
return STAT_BUF_WAITING_DMA;
}
static int hist_buf_pio(struct ispstat *hist)
{
struct isp_device *isp = hist->isp;
u32 *buf = hist->active_buf->virt_addr;
unsigned int i;
if (!buf) {
dev_dbg(isp->dev, "hist: invalid PIO buffer address\n");
hist_reset_mem(hist);
return STAT_NO_BUF;
}
isp_reg_writel(isp, 0, OMAP3_ISP_IOMEM_HIST, ISPHIST_ADDR);
/*
* By setting it, the histogram internal buffer is being cleared at the
* same time it's being read. This bit must be cleared just after all
* data is acquired.
*/
isp_reg_set(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT, ISPHIST_CNT_CLEAR);
/*
* We'll read 4 times a 4-bytes-word at each iteration for
* optimization. It avoids 3/4 of the jumps. We also know buf_size is
* divisible by 16.
*/
for (i = hist->buf_size / 16; i > 0; i--) {
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
*buf++ = isp_reg_readl(isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_DATA);
}
isp_reg_clr(hist->isp, OMAP3_ISP_IOMEM_HIST, ISPHIST_CNT,
ISPHIST_CNT_CLEAR);
return STAT_BUF_DONE;
}
static void ccp2_if_enable(struct isp_ccp2_device *ccp2, u8 enable)
{
struct isp_device *isp = to_isp_device(ccp2);
struct isp_pipeline *pipe = to_isp_pipeline(&ccp2->subdev.entity);
int i;
if (enable && ccp2->vdds_csib)
regulator_enable(ccp2->vdds_csib);
for (i = 0; i < CCP2_LCx_CHANS_NUM; i++)
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_LCx_CTRL(i),
ISPCCP2_LCx_CTRL_CHAN_EN,
enable ? ISPCCP2_LCx_CTRL_CHAN_EN : 0);
isp_reg_clr_set(isp, OMAP3_ISP_IOMEM_CCP2, ISPCCP2_CTRL,
ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN,
enable ? (ISPCCP2_CTRL_MODE | ISPCCP2_CTRL_IF_EN) : 0);
if (pipe->do_propagation) {
if (enable)
isp_reg_set(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQENABLE,
ISPCCP2_LC01_IRQSTATUS_LC0_FS_IRQ);
else
isp_reg_clr(isp, OMAP3_ISP_IOMEM_CCP2,
ISPCCP2_LC01_IRQENABLE,
ISPCCP2_LC01_IRQSTATUS_LC0_FS_IRQ);
}
if (!enable && ccp2->vdds_csib)
regulator_disable(ccp2->vdds_csib);
}
/*
* omap3isp_csi2_reset - Resets the CSI2 module.
*
* Must be called with the phy lock held.
*
* Returns 0 if successful, or -EBUSY if power command didn't respond.
*/
int omap3isp_csi2_reset(struct isp_csi2_device *csi2)
{
struct isp_device *isp = csi2->isp;
u8 soft_reset_retries = 0;
u32 reg;
int i;
if (!csi2->available)
return -ENODEV;
if (csi2->phy->phy_in_use)
return -EBUSY;
isp_reg_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
ISPCSI2_SYSCONFIG_SOFT_RESET);
do {
reg = isp_reg_readl(isp, csi2->regs1, ISPCSI2_SYSSTATUS) &
ISPCSI2_SYSSTATUS_RESET_DONE;
if (reg == ISPCSI2_SYSSTATUS_RESET_DONE)
break;
soft_reset_retries++;
if (soft_reset_retries < 5)
udelay(100);
} while (soft_reset_retries < 5);
if (soft_reset_retries == 5) {
dev_err(isp->dev, "CSI2: Soft reset try count exceeded!\n");
return -EBUSY;
}
if (isp->revision == ISP_REVISION_15_0)
isp_reg_set(isp, csi2->regs1, ISPCSI2_PHY_CFG,
ISPCSI2_PHY_CFG_RESET_CTRL);
i = 100;
do {
reg = isp_reg_readl(isp, csi2->phy->phy_regs, ISPCSIPHY_REG1)
& ISPCSIPHY_REG1_RESET_DONE_CTRLCLK;
if (reg == ISPCSIPHY_REG1_RESET_DONE_CTRLCLK)
break;
udelay(100);
} while (--i > 0);
if (i == 0) {
dev_err(isp->dev,
"CSI2: Reset for CSI2_96M_FCLK domain Failed!\n");
return -EBUSY;
}
if (isp->autoidle)
isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
ISPCSI2_SYSCONFIG_AUTO_IDLE,
ISPCSI2_SYSCONFIG_MSTANDBY_MODE_SMART |
((isp->revision == ISP_REVISION_15_0) ?
ISPCSI2_SYSCONFIG_AUTO_IDLE : 0));
else
isp_reg_clr_set(isp, csi2->regs1, ISPCSI2_SYSCONFIG,
ISPCSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
ISPCSI2_SYSCONFIG_AUTO_IDLE,
ISPCSI2_SYSCONFIG_MSTANDBY_MODE_NO);
return 0;
}