Revert "[media] radio-aimslab: Use LM7000 driver"

This reverts commit bece083a6b2b242c7ab74117640396e1bd851e49.

As requested by Hans Verkuil:
> You accidentally merged the wrong first version of the lm7000 patch series.
>
> These are the correct second version patches:
>
> http://patchwork.linuxtv.org/patch/11689/
> http://patchwork.linuxtv.org/patch/11690/
> http://patchwork.linuxtv.org/patch/11691/
>
> The second version is much simpler and doesn't require the creation of a whole
> new driver.

Requested-by: Hans Verkuil <hverkuil@xs4all.nl>
Cc: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

2 files changed, 45 insertions, 36 deletions

diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index abdf43c0572..5bcce129d71 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -193,14 +193,11 @@ config RADIO_CADET
 
 config RADIO_LM7000
         tristate
-        depends on RADIO_RTRACK
-        default RADIO_RTRACK
 
 config RADIO_RTRACK
         tristate "AIMSlab RadioTrack (aka RadioReveal) support"
         depends on ISA && VIDEO_V4L2
         select RADIO_ISA
-        select RADIO_LM7000
         ---help---
           Choose Y here if you have one of these FM radio cards, and then fill
           in the port address below.
diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c
index 48b72d89dff..98e0c8c2031 100644
--- a/drivers/media/radio/radio-aimslab.c
+++ b/drivers/media/radio/radio-aimslab.c
@@ -37,7 +37,6 @@
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-ctrls.h>
 #include "radio-isa.h"
-#include "lm7000.h"
 
 MODULE_AUTHOR("M. Kirkwood");
 MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
@@ -62,53 +61,66 @@ MODULE_PARM_DESC(radio_nr, "Radio device numbers");
 struct rtrack {
         struct radio_isa_card isa;
         int curvol;
-        struct lm7000 lm;
 };
 
-#define AIMS_BIT_TUN_CE         (1 << 0)
-#define AIMS_BIT_TUN_CLK        (1 << 1)
-#define AIMS_BIT_TUN_DATA       (1 << 2)
-#define AIMS_BIT_VOL_CE         (1 << 3)
-#define AIMS_BIT_TUN_STRQ       (1 << 4)
-/* bit 5 is not connected */
-#define AIMS_BIT_VOL_UP         (1 << 6)        /* active low */
-#define AIMS_BIT_VOL_DN         (1 << 7)        /* active low */
-
-void rtrack_set_pins(struct lm7000 *lm, u8 pins)
+static struct radio_isa_card *rtrack_alloc(void)
 {
-        struct rtrack *rt = container_of(lm, struct rtrack, lm);
-        u8 bits = AIMS_BIT_VOL_DN | AIMS_BIT_VOL_UP | AIMS_BIT_TUN_STRQ;
+        struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL);
 
-        if (!v4l2_ctrl_g_ctrl(rt->isa.mute))
-                bits |= AIMS_BIT_VOL_CE;
+        if (rt)
+                rt->curvol = 0xff;
+        return rt ? &rt->isa : NULL;
+}
 
-        if (pins & LM7000_DATA)
-                bits |= AIMS_BIT_TUN_DATA;
-        if (pins & LM7000_CLK)
-                bits |= AIMS_BIT_TUN_CLK;
-        if (pins & LM7000_CE)
-                bits |= AIMS_BIT_TUN_CE;
+/* The 128+64 on these outb's is to keep the volume stable while tuning.
+ * Without them, the volume _will_ creep up with each frequency change
+ * and bit 4 (+16) is to keep the signal strength meter enabled.
+ */
 
-        outb_p(bits, rt->isa.io);
+static void send_0_byte(struct radio_isa_card *isa, int on)
+{
+        outb_p(128+64+16+on+1, isa->io);        /* wr-enable + data low */
+        outb_p(128+64+16+on+2+1, isa->io);      /* clock */
+        msleep(1);
 }
 
-static struct radio_isa_card *rtrack_alloc(void)
+static void send_1_byte(struct radio_isa_card *isa, int on)
 {
-        struct rtrack *rt = kzalloc(sizeof(struct rtrack), GFP_KERNEL);
-
-        if (rt) {
-                rt->curvol = 0xff;
-                rt->lm.set_pins = rtrack_set_pins;
-        }
-        return rt ? &rt->isa : NULL;
+        outb_p(128+64+16+on+4+1, isa->io);      /* wr-enable+data high */
+        outb_p(128+64+16+on+4+2+1, isa->io);    /* clock */
+        msleep(1);
 }
 
 static int rtrack_s_frequency(struct radio_isa_card *isa, u32 freq)
 {
-        struct rtrack *rt = container_of(isa, struct rtrack, isa);
+        int on = v4l2_ctrl_g_ctrl(isa->mute) ? 0 : 8;
+        int i;
+
+        freq += 171200;                 /* Add 10.7 MHz IF              */
+        freq /= 800;                    /* Convert to 50 kHz units      */
+
+        send_0_byte(isa, on);           /*  0: LSB of frequency         */
+
+        for (i = 0; i < 13; i++)        /*   : frequency bits (1-13)    */
+                if (freq & (1 << i))
+                        send_1_byte(isa, on);
+                else
+                        send_0_byte(isa, on);
+
+        send_0_byte(isa, on);           /* 14: test bit - always 0    */
+        send_0_byte(isa, on);           /* 15: test bit - always 0    */
+
+        send_0_byte(isa, on);           /* 16: band data 0 - always 0 */
+        send_0_byte(isa, on);           /* 17: band data 1 - always 0 */
+        send_0_byte(isa, on);           /* 18: band data 2 - always 0 */
+        send_0_byte(isa, on);           /* 19: time base - always 0   */
 
-        lm7000_set_freq(&rt->lm, freq);
+        send_0_byte(isa, on);           /* 20: spacing (0 = 25 kHz)   */
+        send_1_byte(isa, on);           /* 21: spacing (1 = 25 kHz)   */
+        send_0_byte(isa, on);           /* 22: spacing (0 = 25 kHz)   */
+        send_1_byte(isa, on);           /* 23: AM/FM (FM = 1, always) */
 
+        outb(0xd0 + on, isa->io);       /* volume steady + sigstr */
         return 0;
 }