ALSA: emu10k1: move code for entering E-MU card FPGA programming mode

... into snd_emu1010_load_firmware_entry(). This makes it clearer that
these steps belong together tightly, as implied by prior commits.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Message-ID: <20240428093717.3198716-5-oswald.buddenhagen@gmx.de>

include/sound/emu10k1.h

@@ -1843,7 +1843,7 @@ void snd_emu1010_fpga_link_dst_src_write(struct snd_emu10k1 *emu, u32 dst, u32 s
 u32 snd_emu1010_fpga_link_dst_src_read(struct snd_emu10k1 *emu, u32 dst);
 int snd_emu1010_get_raw_rate(struct snd_emu10k1 *emu, u8 src);
 void snd_emu1010_update_clock(struct snd_emu10k1 *emu);
-void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, const struct firmware *fw_entry);
+void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, int dock, const struct firmware *fw_entry);
 unsigned int snd_emu10k1_efx_read(struct snd_emu10k1 *emu, unsigned int pc);
 void snd_emu10k1_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb);
 void snd_emu10k1_intr_disable(struct snd_emu10k1 *emu, unsigned int intrenb);

sound/pci/emu10k1/emu10k1_main.c

@@ -683,7 +683,7 @@ static int snd_emu1010_load_firmware(struct snd_emu10k1 *emu, int dock,
 			return err;
 	}
 
-	snd_emu1010_load_firmware_entry(emu, *fw);
+	snd_emu1010_load_firmware_entry(emu, dock, *fw);
 	return 0;
 }
 
@@ -699,9 +699,6 @@ static void snd_emu1010_load_dock_firmware(struct snd_emu10k1 *emu)
 	msleep(200);
 
 	dev_info(emu->card->dev, "emu1010: Loading Audio Dock Firmware\n");
-	/* Return to Audio Dock programming mode */
-	snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG,
-			       EMU_HANA_FPGA_CONFIG_AUDIODOCK);
 	err = snd_emu1010_load_firmware(emu, 1, &emu->dock_fw);
 	if (err < 0)
 		return;
@@ -820,8 +817,6 @@ static int snd_emu10k1_emu1010_init(struct snd_emu10k1 *emu)
 	snd_emu1010_fpga_lock(emu);
 
 	dev_info(emu->card->dev, "emu1010: Loading Hana Firmware\n");
-	snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG,
-			       EMU_HANA_FPGA_CONFIG_HANA);
 	err = snd_emu1010_load_firmware(emu, 0, &emu->firmware);
 	if (err < 0) {
 		dev_info(emu->card->dev, "emu1010: Loading Firmware failed\n");

sound/pci/emu10k1/io.c

@@ -422,7 +422,7 @@ void snd_emu1010_update_clock(struct snd_emu10k1 *emu)
 	snd_emu1010_fpga_write(emu, EMU_HANA_DOCK_LEDS_2, leds);
 }
 
-void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu,
+void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu, int dock,
 				     const struct firmware *fw_entry)
 {
 	__always_unused u16 write_post;
@@ -440,6 +440,11 @@ void snd_emu1010_load_firmware_entry(struct snd_emu10k1 *emu,
 	// GPO6 -> FPGA CCLK & FPGA input
 	// GPO5 -> FPGA DIN (dual function)
 
+	// If the FPGA is already programmed, return it to programming mode
+	snd_emu1010_fpga_write(emu, EMU_HANA_FPGA_CONFIG,
+			       dock ? EMU_HANA_FPGA_CONFIG_AUDIODOCK :
+				      EMU_HANA_FPGA_CONFIG_HANA);
+
 	// Assert reset line for 100uS
 	outw(0x00, emu->port + A_GPIO);
 	write_post = inw(emu->port + A_GPIO);