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V4L/DVB (3726): Fix TT budget-ci 1.1 CI slots
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It turns out the firmware on the TT budget-ci 1.1 slots doesn't generate
interrupts. This patch adds support for this using polling mode on these
slots.

Signed-off-by: Andrew de Quincey <adq_dvb@lidskialf.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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Andrew de Quincey authored and Mauro Carvalho Chehab committed May 12, 2006
1 parent f47f476 commit 96b194c
Showing 1 changed file with 85 additions and 20 deletions.
105 changes: 85 additions & 20 deletions drivers/media/dvb/ttpci/budget-ci.c
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Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,7 @@ struct budget_ci {
struct tasklet_struct msp430_irq_tasklet;
struct tasklet_struct ciintf_irq_tasklet;
int slot_status;
int ci_irq;
struct dvb_ca_en50221 ca;
char ir_dev_name[50];
u8 tuner_pll_address; /* used for philips_tdm1316l configs */
Expand Down Expand Up @@ -276,8 +277,10 @@ static int ciintf_slot_reset(struct dvb_ca_en50221 *ca, int slot)
if (slot != 0)
return -EINVAL;

// trigger on RISING edge during reset so we know when READY is re-asserted
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQHI);
if (budget_ci->ci_irq) {
// trigger on RISING edge during reset so we know when READY is re-asserted
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQHI);
}
budget_ci->slot_status = SLOTSTATUS_RESET;
ttpci_budget_debiwrite(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1, 0, 1, 0);
msleep(1);
Expand Down Expand Up @@ -370,28 +373,80 @@ static void ciintf_interrupt(unsigned long data)
}
}

static int ciintf_poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
{
struct budget_ci *budget_ci = (struct budget_ci *) ca->data;
unsigned int flags;

// ensure we don't get spurious IRQs during initialisation
if (!budget_ci->budget.ci_present)
return -EINVAL;

// read the CAM status
flags = ttpci_budget_debiread(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1, 1, 0);
if (flags & CICONTROL_CAMDETECT) {
// mark it as present if it wasn't before
if (budget_ci->slot_status & SLOTSTATUS_NONE) {
budget_ci->slot_status = SLOTSTATUS_PRESENT;
}

// during a RESET, we check if we can read from IO memory to see when CAM is ready
if (budget_ci->slot_status & SLOTSTATUS_RESET) {
if (ciintf_read_attribute_mem(ca, slot, 0) == 0x1d) {
budget_ci->slot_status = SLOTSTATUS_READY;
}
}
} else {
budget_ci->slot_status = SLOTSTATUS_NONE;
}

if (budget_ci->slot_status != SLOTSTATUS_NONE) {
if (budget_ci->slot_status & SLOTSTATUS_READY) {
return DVB_CA_EN50221_POLL_CAM_PRESENT | DVB_CA_EN50221_POLL_CAM_READY;
}
return DVB_CA_EN50221_POLL_CAM_PRESENT;
}

return 0;
}

static int ciintf_init(struct budget_ci *budget_ci)
{
struct saa7146_dev *saa = budget_ci->budget.dev;
int flags;
int result;
int ci_version;
int ca_flags;

memset(&budget_ci->ca, 0, sizeof(struct dvb_ca_en50221));

// enable DEBI pins
saa7146_write(saa, MC1, saa7146_read(saa, MC1) | (0x800 << 16) | 0x800);

// test if it is there
if ((ttpci_budget_debiread(&budget_ci->budget, DEBICICTL, DEBIADDR_CIVERSION, 1, 1, 0) & 0xa0) != 0xa0) {
ci_version = ttpci_budget_debiread(&budget_ci->budget, DEBICICTL, DEBIADDR_CIVERSION, 1, 1, 0);
if ((ci_version & 0xa0) != 0xa0) {
result = -ENODEV;
goto error;
}

// determine whether a CAM is present or not
flags = ttpci_budget_debiread(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1, 1, 0);
budget_ci->slot_status = SLOTSTATUS_NONE;
if (flags & CICONTROL_CAMDETECT)
budget_ci->slot_status = SLOTSTATUS_PRESENT;

// version 0xa2 of the CI firmware doesn't generate interrupts
if (ci_version == 0xa2) {
ca_flags = 0;
budget_ci->ci_irq = 0;
} else {
ca_flags = DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE |
DVB_CA_EN50221_FLAG_IRQ_FR |
DVB_CA_EN50221_FLAG_IRQ_DA;
budget_ci->ci_irq = 1;
}

// register CI interface
budget_ci->ca.owner = THIS_MODULE;
budget_ci->ca.read_attribute_mem = ciintf_read_attribute_mem;
Expand All @@ -401,23 +456,27 @@ static int ciintf_init(struct budget_ci *budget_ci)
budget_ci->ca.slot_reset = ciintf_slot_reset;
budget_ci->ca.slot_shutdown = ciintf_slot_shutdown;
budget_ci->ca.slot_ts_enable = ciintf_slot_ts_enable;
budget_ci->ca.poll_slot_status = ciintf_poll_slot_status;
budget_ci->ca.data = budget_ci;
if ((result = dvb_ca_en50221_init(&budget_ci->budget.dvb_adapter,
&budget_ci->ca,
DVB_CA_EN50221_FLAG_IRQ_CAMCHANGE |
DVB_CA_EN50221_FLAG_IRQ_FR |
DVB_CA_EN50221_FLAG_IRQ_DA, 1)) != 0) {
ca_flags, 1)) != 0) {
printk("budget_ci: CI interface detected, but initialisation failed.\n");
goto error;
}

// Setup CI slot IRQ
tasklet_init(&budget_ci->ciintf_irq_tasklet, ciintf_interrupt, (unsigned long) budget_ci);
if (budget_ci->slot_status != SLOTSTATUS_NONE) {
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQLO);
} else {
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQHI);
if (budget_ci->ci_irq) {
tasklet_init(&budget_ci->ciintf_irq_tasklet, ciintf_interrupt, (unsigned long) budget_ci);
if (budget_ci->slot_status != SLOTSTATUS_NONE) {
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQLO);
} else {
saa7146_setgpio(saa, 0, SAA7146_GPIO_IRQHI);
}
saa7146_write(saa, IER, saa7146_read(saa, IER) | MASK_03);
}
saa7146_write(saa, IER, saa7146_read(saa, IER) | MASK_03);

// enable interface
ttpci_budget_debiwrite(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1,
CICONTROL_RESET, 1, 0);

Expand All @@ -426,10 +485,12 @@ static int ciintf_init(struct budget_ci *budget_ci)
budget_ci->budget.ci_present = 1;

// forge a fake CI IRQ so the CAM state is setup correctly
flags = DVB_CA_EN50221_CAMCHANGE_REMOVED;
if (budget_ci->slot_status != SLOTSTATUS_NONE)
flags = DVB_CA_EN50221_CAMCHANGE_INSERTED;
dvb_ca_en50221_camchange_irq(&budget_ci->ca, 0, flags);
if (budget_ci->ci_irq) {
flags = DVB_CA_EN50221_CAMCHANGE_REMOVED;
if (budget_ci->slot_status != SLOTSTATUS_NONE)
flags = DVB_CA_EN50221_CAMCHANGE_INSERTED;
dvb_ca_en50221_camchange_irq(&budget_ci->ca, 0, flags);
}

return 0;

Expand All @@ -443,9 +504,13 @@ static void ciintf_deinit(struct budget_ci *budget_ci)
struct saa7146_dev *saa = budget_ci->budget.dev;

// disable CI interrupts
saa7146_write(saa, IER, saa7146_read(saa, IER) & ~MASK_03);
saa7146_setgpio(saa, 0, SAA7146_GPIO_INPUT);
tasklet_kill(&budget_ci->ciintf_irq_tasklet);
if (budget_ci->ci_irq) {
saa7146_write(saa, IER, saa7146_read(saa, IER) & ~MASK_03);
saa7146_setgpio(saa, 0, SAA7146_GPIO_INPUT);
tasklet_kill(&budget_ci->ciintf_irq_tasklet);
}

// reset interface
ttpci_budget_debiwrite(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1, 0, 1, 0);
msleep(1);
ttpci_budget_debiwrite(&budget_ci->budget, DEBICICTL, DEBIADDR_CICONTROL, 1,
Expand Down Expand Up @@ -473,7 +538,7 @@ static void budget_ci_irq(struct saa7146_dev *dev, u32 * isr)
if (*isr & MASK_10)
ttpci_budget_irq10_handler(dev, isr);

if ((*isr & MASK_03) && (budget_ci->budget.ci_present))
if ((*isr & MASK_03) && (budget_ci->budget.ci_present) && (budget_ci->ci_irq))
tasklet_schedule(&budget_ci->ciintf_irq_tasklet);
}

Expand Down

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