ALSA: Echoaudio - Add firmware cache #1

Changes the way the firmware is passed through functions.

When CONFIG_PM is enabled the firmware cannot be released because the
driver will need it again to resume the card. 
With this patch the firmware is passed as an index of the struct
firmware card_fw[] in place of a pointer. That same index is then used
to locate the firmware in the firmware cache.

Signed-off-by: Giuliano Pochini <pochini@shiny.it>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/echoaudio/mona_dsp.c

@@ -33,8 +33,7 @@ static int write_control_reg(struct echoaudio *chip, u32 value, char force);
 static int set_input_clock(struct echoaudio *chip, u16 clock);
 static int set_professional_spdif(struct echoaudio *chip, char prof);
 static int set_digital_mode(struct echoaudio *chip, u8 mode);
-static int load_asic_generic(struct echoaudio *chip, u32 cmd,
-			     const struct firmware *asic);
+static int load_asic_generic(struct echoaudio *chip, u32 cmd, short asic);
 static int check_asic_status(struct echoaudio *chip);
 
 
@@ -64,9 +63,9 @@ static int init_hw(struct echoaudio *chip, u16 device_id, u16 subdevice_id)
 
 	/* Mona comes in both '301 and '361 flavors */
 	if (chip->device_id == DEVICE_ID_56361)
-		chip->dsp_code_to_load = &card_fw[FW_MONA_361_DSP];
+		chip->dsp_code_to_load = FW_MONA_361_DSP;
 	else
-		chip->dsp_code_to_load = &card_fw[FW_MONA_301_DSP];
+		chip->dsp_code_to_load = FW_MONA_301_DSP;
 
 	chip->digital_mode = DIGITAL_MODE_SPDIF_RCA;
 	chip->professional_spdif = FALSE;
@@ -120,7 +119,7 @@ static int load_asic(struct echoaudio *chip)
 {
 	u32 control_reg;
 	int err;
-	const struct firmware *asic;
+	short asic;
 
 	if (chip->asic_loaded)
 		return 0;
@@ -128,9 +127,9 @@ static int load_asic(struct echoaudio *chip)
 	mdelay(10);
 
 	if (chip->device_id == DEVICE_ID_56361)
-		asic = &card_fw[FW_MONA_361_1_ASIC48];
+		asic = FW_MONA_361_1_ASIC48;
 	else
-		asic = &card_fw[FW_MONA_301_1_ASIC48];
+		asic = FW_MONA_301_1_ASIC48;
 
 	err = load_asic_generic(chip, DSP_FNC_LOAD_MONA_PCI_CARD_ASIC, asic);
 	if (err < 0)
@@ -141,7 +140,7 @@ static int load_asic(struct echoaudio *chip)
 
 	/* Do the external one */
 	err = load_asic_generic(chip, DSP_FNC_LOAD_MONA_EXTERNAL_ASIC,
-				&card_fw[FW_MONA_2_ASIC]);
+				FW_MONA_2_ASIC);
 	if (err < 0)
 		return err;
 
@@ -165,22 +164,22 @@ loaded.  This function checks the ASIC needed for the new mode and sees
 if it matches the one already loaded. */
 static int switch_asic(struct echoaudio *chip, char double_speed)
 {
-	const struct firmware *asic;
 	int err;
+	short asic;
 
 	/* Check the clock detect bits to see if this is
 	a single-speed clock or a double-speed clock; load
 	a new ASIC if necessary. */
 	if (chip->device_id == DEVICE_ID_56361) {
 		if (double_speed)
-			asic = &card_fw[FW_MONA_361_1_ASIC96];
+			asic = FW_MONA_361_1_ASIC96;
 		else
-			asic = &card_fw[FW_MONA_361_1_ASIC48];
+			asic = FW_MONA_361_1_ASIC48;
 	} else {
 		if (double_speed)
-			asic = &card_fw[FW_MONA_301_1_ASIC96];
+			asic = FW_MONA_301_1_ASIC96;
 		else
-			asic = &card_fw[FW_MONA_301_1_ASIC48];
+			asic = FW_MONA_301_1_ASIC48;
 	}
 
 	if (asic != chip->asic_code) {
@@ -200,7 +199,7 @@ static int switch_asic(struct echoaudio *chip, char double_speed)
 static int set_sample_rate(struct echoaudio *chip, u32 rate)
 {
 	u32 control_reg, clock;
-	const struct firmware *asic;
+	short asic;
 	char force_write;
 
 	/* Only set the clock for internal mode. */
@@ -218,14 +217,14 @@ static int set_sample_rate(struct echoaudio *chip, u32 rate)
 		if (chip->digital_mode == DIGITAL_MODE_ADAT)
 			return -EINVAL;
 		if (chip->device_id == DEVICE_ID_56361)
-			asic = &card_fw[FW_MONA_361_1_ASIC96];
+			asic = FW_MONA_361_1_ASIC96;
 		else
-			asic = &card_fw[FW_MONA_301_1_ASIC96];
+			asic = FW_MONA_301_1_ASIC96;
 	} else {
 		if (chip->device_id == DEVICE_ID_56361)
-			asic = &card_fw[FW_MONA_361_1_ASIC48];
+			asic = FW_MONA_361_1_ASIC48;
 		else
-			asic = &card_fw[FW_MONA_301_1_ASIC48];
+			asic = FW_MONA_301_1_ASIC48;
 	}
 
 	force_write = 0;
@@ -410,8 +409,8 @@ static int dsp_set_digital_mode(struct echoaudio *chip, u8 mode)
 	case DIGITAL_MODE_ADAT:
 		/* If the current ASIC is the 96KHz ASIC, switch the ASIC
 		   and set to 48 KHz */
-		if (chip->asic_code == &card_fw[FW_MONA_361_1_ASIC96] ||
-		    chip->asic_code == &card_fw[FW_MONA_301_1_ASIC96]) {
+		if (chip->asic_code == FW_MONA_361_1_ASIC96 ||
+		    chip->asic_code == FW_MONA_301_1_ASIC96) {
 			set_sample_rate(chip, 48000);
 		}
 		control_reg |= GML_ADAT_MODE;