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V4L/DVB (6246): GemTek Radio card - Control Word 

Redoes the way the control word is stored and set.
The existing code was a lot more complicated than it needed to be.

Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Reviewed-by: Pekka Seppänen <pexu@kapsi.fi>
This commit is contained in:
Trent Piepho 2007-10-01 00:38:30 -03:00 committed by Mauro Carvalho Chehab
parent 857e594ad5
commit b25be97929
1 changed files with 43 additions and 79 deletions
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122
drivers/media/radio/radio-gemtek.c
View File

@ -106,7 +106,6 @@ module_param(radio_nr, int, 0444);
#define GEMTEK_PLL_OFF 0x07 /* PLL off */
#define BU2614_BUS_SIZE 32 /* BU2614 / BU2614FS bus size */
#define BU2614_NOPS 8 /* Number of supported operations */
#define SHORT_DELAY 5 /* usec */
#define LONG_DELAY 75 /* usec */
@ -114,72 +113,53 @@ module_param(radio_nr, int, 0444);
struct gemtek_device {
unsigned long lastfreq;
int muted;
unsigned long bu2614data[BU2614_NOPS];
u32 bu2614data;
};
enum {
BU2614_VOID,
BU2614_FREQ, /* D0..D15, Frequency data */
BU2614_PORT, /* P0..P2, Output port control data */
BU2614_FMES, /* CT, Frequency measurement beginning data */
BU2614_STDF, /* R0..R2, Standard frequency data */
BU2614_SWIN, /* S, Switch between FMIN / AMIN */
BU2614_SWAL, /* PS, Swallow counter division (AMIN only) */
BU2614_FMUN, /* GT, Frequency measurement time and unlock */
BU2614_TEST /* TS, Test data is input */
};
#define BU2614_FREQ_BITS 16 /* D0..D15, Frequency data */
#define BU2614_PORT_BITS 3 /* P0..P2, Output port control data */
#define BU2614_VOID_BITS 4 /* unused */
#define BU2614_FMES_BITS 1 /* CT, Frequency measurement beginning data */
#define BU2614_STDF_BITS 3 /* R0..R2, Standard frequency data */
#define BU2614_SWIN_BITS 1 /* S, Switch between FMIN / AMIN */
#define BU2614_SWAL_BITS 1 /* PS, Swallow counter division (AMIN only)*/
#define BU2614_VOID2_BITS 1 /* unused */
#define BU2614_FMUN_BITS 1 /* GT, Frequency measurement time & unlock */
#define BU2614_TEST_BITS 1 /* TS, Test data is input */
struct bu2614_op {
int op; /* Operation */
int size; /* Data size */
};
#define BU2614_FREQ_SHIFT 0
#define BU2614_PORT_SHIFT (BU2614_FREQ_BITS + BU2614_FREQ_SHIFT)
#define BU2614_VOID_SHIFT (BU2614_PORT_BITS + BU2614_PORT_SHIFT)
#define BU2614_FMES_SHIFT (BU2614_VOID_BITS + BU2614_VOID_SHIFT)
#define BU2614_STDF_SHIFT (BU2614_FMES_BITS + BU2614_FMES_SHIFT)
#define BU2614_SWIN_SHIFT (BU2614_STDF_BITS + BU2614_STDF_SHIFT)
#define BU2614_SWAL_SHIFT (BU2614_SWIN_BITS + BU2614_SWIN_SHIFT)
#define BU2614_VOID2_SHIFT (BU2614_SWAL_BITS + BU2614_SWAL_SHIFT)
#define BU2614_FMUN_SHIFT (BU2614_VOID2_BITS + BU2614_VOID2_SHIFT)
#define BU2614_TEST_SHIFT (BU2614_FMUN_BITS + BU2614_FMUN_SHIFT)
#define MKMASK(field) (((1<<BU2614_##field##_BITS) - 1) << \
BU2614_##field##_SHIFT)
#define BU2614_PORT_MASK MKMASK(PORT)
#define BU2614_FREQ_MASK MKMASK(FREQ)
#define BU2614_VOID_MASK MKMASK(VOID)
#define BU2614_FMES_MASK MKMASK(FMES)
#define BU2614_STDF_MASK MKMASK(STDF)
#define BU2614_SWIN_MASK MKMASK(SWIN)
#define BU2614_SWAL_MASK MKMASK(SWAL)
#define BU2614_VOID2_MASK MKMASK(VOID2)
#define BU2614_FMUN_MASK MKMASK(FMUN)
#define BU2614_TEST_MASK MKMASK(TEST)
static struct gemtek_device gemtek_unit;
static struct bu2614_op bu2614ops[] = {
{.op = BU2614_FREQ,
.size = 0x10},
{.op = BU2614_PORT,
.size = 0x03},
{.op = BU2614_VOID,
.size = 0x04},
{.op = BU2614_FMES,
.size = 0x01},
{.op = BU2614_STDF,
.size = 0x03},
{.op = BU2614_SWIN,
.size = 0x01},
{.op = BU2614_SWAL,
.size = 0x01},
{.op = BU2614_VOID,
.size = 0x01},
{.op = BU2614_FMUN,
.size = 0x01},
{.op = BU2614_TEST,
.size = 0x01}
};
static spinlock_t lock;
/*
* Set data which will be sent to BU2614FS.
*/
static void gemtek_bu2614_set(struct gemtek_device *dev, int op,
unsigned long data)
{
int i, q;
for (i = 0, q = 0; q < ARRAY_SIZE(dev->bu2614data); ++i) {
if (bu2614ops[i].op == op) {
dev->bu2614data[q] =
data & ((1 << bu2614ops[i].size) - 1);
return;
}
if (bu2614ops[i].op != BU2614_VOID)
++q;
}
}
#define gemtek_bu2614_set(dev, field, data) ((dev)->bu2614data = \
((dev)->bu2614data & ~field##_MASK) | ((data) << field##_SHIFT))
/*
* Transmit settings to BU2614FS over GemTek IC.
@ -197,25 +177,12 @@ static void gemtek_bu2614_transmit(struct gemtek_device *dev)
outb_p(mute | GEMTEK_CE | GEMTEK_DA | GEMTEK_CK, io);
udelay(LONG_DELAY);
for (i = 0, q = 0; q < ARRAY_SIZE(dev->bu2614data); ++i) {
for (bit = 0; bit < bu2614ops[i].size; ++bit) {
if (bu2614ops[i].op != BU2614_VOID &&
dev->bu2614data[q] & (1 << bit)) {
outb_p(mute | GEMTEK_CE | GEMTEK_DA, io);
udelay(SHORT_DELAY);
outb_p(mute | GEMTEK_CE | GEMTEK_DA |
GEMTEK_CK, io);
udelay(SHORT_DELAY);
} else {
outb_p(mute | GEMTEK_CE, io);
udelay(SHORT_DELAY);
outb_p(mute | GEMTEK_CE | GEMTEK_CK, io);
udelay(SHORT_DELAY);
}
}
if (bu2614ops[i].op != BU2614_VOID)
++q;
for (i = 0, q = dev->bu2614data; i < 32; i++, q >>= 1) {
bit = (q & 1) ? GEMTEK_DA : 0;
outb_p(mute | GEMTEK_CE | bit, io);
udelay(SHORT_DELAY);
outb_p(mute | GEMTEK_CE | bit | GEMTEK_CK, io);
udelay(SHORT_DELAY);
}
outb_p(mute | GEMTEK_DA | GEMTEK_CK, io);
@ -612,8 +579,6 @@ static struct video_device gemtek_radio = {
*/
static int __init gemtek_init(void)
{
int i;
printk(KERN_INFO RADIO_BANNER "\n");
spin_lock_init(&lock);
@ -651,8 +616,7 @@ static int __init gemtek_init(void)
/* Set defaults */
gemtek_unit.lastfreq = GEMTEK_LOWFREQ;
for (i = 0; i < ARRAY_SIZE(gemtek_unit.bu2614data); ++i)
gemtek_unit.bu2614data[i] = 0;
gemtek_unit.bu2614data = 0;
if (initmute)
gemtek_mute(&gemtek_unit);