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path: root/drivers/media/rc/nuvoton-cir.c
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Diffstat (limited to 'drivers/media/rc/nuvoton-cir.c')
-rw-r--r--drivers/media/rc/nuvoton-cir.c137
1 files changed, 14 insertions, 123 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index e8ceb0e2f..00215f343 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -139,11 +139,7 @@ static inline void nvt_cir_reg_write(struct nvt_dev *nvt, u8 val, u8 offset)
/* read val from cir config register */
static u8 nvt_cir_reg_read(struct nvt_dev *nvt, u8 offset)
{
- u8 val;
-
- val = inb(nvt->cir_addr + offset);
-
- return val;
+ return inb(nvt->cir_addr + offset);
}
/* write val to cir wake register */
@@ -156,11 +152,7 @@ static inline void nvt_cir_wake_reg_write(struct nvt_dev *nvt,
/* read val from cir wake config register */
static u8 nvt_cir_wake_reg_read(struct nvt_dev *nvt, u8 offset)
{
- u8 val;
-
- val = inb(nvt->cir_wake_addr + offset);
-
- return val;
+ return inb(nvt->cir_wake_addr + offset);
}
/* don't override io address if one is set already */
@@ -481,18 +473,14 @@ static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
nvt_set_ioaddr(nvt, &nvt->cir_wake_addr);
- nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
-
- nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
- nvt->cir_wake_addr, nvt->cir_wake_irq);
+ nvt_dbg("CIR Wake initialized, base io port address: 0x%lx",
+ nvt->cir_wake_addr);
}
/* clear out the hardware's cir rx fifo */
static void nvt_clear_cir_fifo(struct nvt_dev *nvt)
{
- u8 val;
-
- val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
+ u8 val = nvt_cir_reg_read(nvt, CIR_FIFOCON);
nvt_cir_reg_write(nvt, val | CIR_FIFOCON_RXFIFOCLR, CIR_FIFOCON);
}
@@ -528,7 +516,7 @@ static void nvt_set_cir_iren(struct nvt_dev *nvt)
{
u8 iren;
- iren = CIR_IREN_RTR | CIR_IREN_PE;
+ iren = CIR_IREN_RTR | CIR_IREN_PE | CIR_IREN_RFO;
nvt_cir_reg_write(nvt, iren, CIR_IREN);
}
@@ -567,34 +555,15 @@ static void nvt_cir_regs_init(struct nvt_dev *nvt)
static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
{
- /* set number of bytes needed for wake from s3 (default 65) */
- nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES,
- CIR_WAKE_FIFO_CMP_DEEP);
-
- /* set tolerance/variance allowed per byte during wake compare */
- nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
- CIR_WAKE_FIFO_CMP_TOL);
-
- /* set sample limit count (PE interrupt raised when reached) */
- nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT >> 8, CIR_WAKE_SLCH);
- nvt_cir_wake_reg_write(nvt, CIR_RX_LIMIT_COUNT & 0xff, CIR_WAKE_SLCL);
-
- /* set cir wake fifo rx trigger level (currently 67) */
- nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFOCON_RX_TRIGGER_LEV,
- CIR_WAKE_FIFOCON);
-
/*
- * Enable TX and RX, specific carrier on = low, off = high, and set
- * sample period (currently 50us)
+ * Disable RX, set specific carrier on = low, off = high,
+ * and sample period (currently 50us)
*/
- nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 | CIR_WAKE_IRCON_RXEN |
+ nvt_cir_wake_reg_write(nvt, CIR_WAKE_IRCON_MODE0 |
CIR_WAKE_IRCON_R | CIR_WAKE_IRCON_RXINV |
CIR_WAKE_IRCON_SAMPLE_PERIOD_SEL,
CIR_WAKE_IRCON);
- /* clear cir wake rx fifo */
- nvt_clear_cir_wake_fifo(nvt);
-
/* clear any and all stray interrupts */
nvt_cir_wake_reg_write(nvt, 0xff, CIR_WAKE_IRSTS);
@@ -789,8 +758,6 @@ static void nvt_process_rx_ir_data(struct nvt_dev *nvt)
nvt_dbg_verbose("Processing buffer of len %d", nvt->pkts);
- init_ir_raw_event(&rawir);
-
for (i = 0; i < nvt->pkts; i++) {
sample = nvt->buf[i];
@@ -836,19 +803,10 @@ static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
{
u8 fifocount, val;
unsigned int b_idx;
- bool overrun = false;
int i;
/* Get count of how many bytes to read from RX FIFO */
fifocount = nvt_cir_reg_read(nvt, CIR_RXFCONT);
- /* if we get 0xff, probably means the logical dev is disabled */
- if (fifocount == 0xff)
- return;
- /* watch out for a fifo overrun condition */
- else if (fifocount > RX_BUF_LEN) {
- overrun = true;
- fifocount = RX_BUF_LEN;
- }
nvt_dbg("attempting to fetch %u bytes from hw rx fifo", fifocount);
@@ -870,9 +828,6 @@ static void nvt_get_rx_ir_data(struct nvt_dev *nvt)
nvt_dbg("%s: pkts now %d", __func__, nvt->pkts);
nvt_process_rx_ir_data(nvt);
-
- if (overrun)
- nvt_handle_rx_fifo_overrun(nvt);
}
static void nvt_cir_log_irqs(u8 status, u8 iren)
@@ -908,7 +863,7 @@ static bool nvt_cir_tx_inactive(struct nvt_dev *nvt)
static irqreturn_t nvt_cir_isr(int irq, void *data)
{
struct nvt_dev *nvt = data;
- u8 status, iren, cur_state;
+ u8 status, iren;
unsigned long flags;
nvt_dbg_verbose("%s firing", __func__);
@@ -946,23 +901,15 @@ static irqreturn_t nvt_cir_isr(int irq, void *data)
nvt_cir_log_irqs(status, iren);
- if (status & CIR_IRSTS_RTR) {
- /* FIXME: add code for study/learn mode */
+ if (status & CIR_IRSTS_RFO)
+ nvt_handle_rx_fifo_overrun(nvt);
+
+ else if (status & (CIR_IRSTS_RTR | CIR_IRSTS_PE)) {
/* We only do rx if not tx'ing */
if (nvt_cir_tx_inactive(nvt))
nvt_get_rx_ir_data(nvt);
}
- if (status & CIR_IRSTS_PE) {
- if (nvt_cir_tx_inactive(nvt))
- nvt_get_rx_ir_data(nvt);
-
- cur_state = nvt->study_state;
-
- if (cur_state == ST_STUDY_NONE)
- nvt_clear_cir_fifo(nvt);
- }
-
spin_unlock_irqrestore(&nvt->nvt_lock, flags);
if (status & CIR_IRSTS_TE)
@@ -1004,51 +951,6 @@ static irqreturn_t nvt_cir_isr(int irq, void *data)
return IRQ_HANDLED;
}
-/* Interrupt service routine for CIR Wake */
-static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
-{
- u8 status, iren, val;
- struct nvt_dev *nvt = data;
- unsigned long flags;
-
- nvt_dbg_wake("%s firing", __func__);
-
- spin_lock_irqsave(&nvt->nvt_lock, flags);
-
- status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
- iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
-
- /* IRQ may be shared with CIR, therefore check for each
- * status bit whether the related interrupt source is enabled
- */
- if (!(status & iren)) {
- spin_unlock_irqrestore(&nvt->nvt_lock, flags);
- return IRQ_NONE;
- }
-
- if (status & CIR_WAKE_IRSTS_IR_PENDING)
- nvt_clear_cir_wake_fifo(nvt);
-
- nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
- nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
-
- if ((status & CIR_WAKE_IRSTS_PE) &&
- (nvt->wake_state == ST_WAKE_START)) {
- while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
- val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
- nvt_dbg("setting wake up key: 0x%x", val);
- }
-
- nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
- nvt->wake_state = ST_WAKE_FINISH;
- }
-
- spin_unlock_irqrestore(&nvt->nvt_lock, flags);
-
- nvt_dbg_wake("%s done", __func__);
- return IRQ_HANDLED;
-}
-
static void nvt_disable_cir(struct nvt_dev *nvt)
{
unsigned long flags;
@@ -1152,8 +1054,6 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
nvt->cir_irq = pnp_irq(pdev, 0);
nvt->cir_wake_addr = pnp_port_start(pdev, 1);
- /* irq is always shared between cir and cir wake */
- nvt->cir_wake_irq = nvt->cir_irq;
nvt->cr_efir = CR_EFIR;
nvt->cr_efdr = CR_EFDR;
@@ -1229,11 +1129,6 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
CIR_IOREG_LENGTH, NVT_DRIVER_NAME "-wake"))
goto exit_unregister_device;
- if (devm_request_irq(&pdev->dev, nvt->cir_wake_irq,
- nvt_cir_wake_isr, IRQF_SHARED,
- NVT_DRIVER_NAME "-wake", (void *)nvt))
- goto exit_unregister_device;
-
ret = device_create_file(&rdev->dev, &dev_attr_wakeup_data);
if (ret)
goto exit_unregister_device;
@@ -1284,10 +1179,6 @@ static int nvt_suspend(struct pnp_dev *pdev, pm_message_t state)
spin_lock_irqsave(&nvt->nvt_lock, flags);
- /* zero out misc state tracking */
- nvt->study_state = ST_STUDY_NONE;
- nvt->wake_state = ST_WAKE_NONE;
-
/* disable all CIR interrupts */
nvt_cir_reg_write(nvt, 0, CIR_IREN);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-15 21:05:42 +0000