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

This reverts commit bece083a.

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>

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.

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;
 }