2  * C-Media CMI8788 driver - helper functions
16  *  along with this driver; if not, write to the Free Software
17  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
28 u8 oxygen_read8(struct oxygen *chip, unsigned int reg)  in oxygen_read8()  argument
30 	return inb(chip->addr + reg);  in oxygen_read8()
34 u16 oxygen_read16(struct oxygen *chip, unsigned int reg)  in oxygen_read16()  argument
36 	return inw(chip->addr + reg);  in oxygen_read16()
40 u32 oxygen_read32(struct oxygen *chip, unsigned int reg)  in oxygen_read32()  argument
42 	return inl(chip->addr + reg);  in oxygen_read32()
46 void oxygen_write8(struct oxygen *chip, unsigned int reg, u8 value)  in oxygen_write8()  argument
48 	outb(value, chip->addr + reg);  in oxygen_write8()
49 	chip->saved_registers._8[reg] = value;  in oxygen_write8()
53 void oxygen_write16(struct oxygen *chip, unsigned int reg, u16 value)  in oxygen_write16()  argument
55 	outw(value, chip->addr + reg);  in oxygen_write16()
56 	chip->saved_registers._16[reg / 2] = cpu_to_le16(value);  in oxygen_write16()
60 void oxygen_write32(struct oxygen *chip, unsigned int reg, u32 value)  in oxygen_write32()  argument
62 	outl(value, chip->addr + reg);  in oxygen_write32()
63 	chip->saved_registers._32[reg / 4] = cpu_to_le32(value);  in oxygen_write32()
67 void oxygen_write8_masked(struct oxygen *chip, unsigned int reg,  in oxygen_write8_masked()  argument
70 	u8 tmp = inb(chip->addr + reg);  in oxygen_write8_masked()
73 	outb(tmp, chip->addr + reg);  in oxygen_write8_masked()
74 	chip->saved_registers._8[reg] = tmp;  in oxygen_write8_masked()
78 void oxygen_write16_masked(struct oxygen *chip, unsigned int reg,  in oxygen_write16_masked()  argument
81 	u16 tmp = inw(chip->addr + reg);  in oxygen_write16_masked()
84 	outw(tmp, chip->addr + reg);  in oxygen_write16_masked()
85 	chip->saved_registers._16[reg / 2] = cpu_to_le16(tmp);  in oxygen_write16_masked()
89 void oxygen_write32_masked(struct oxygen *chip, unsigned int reg,  in oxygen_write32_masked()  argument
92 	u32 tmp = inl(chip->addr + reg);  in oxygen_write32_masked()
95 	outl(tmp, chip->addr + reg);  in oxygen_write32_masked()
96 	chip->saved_registers._32[reg / 4] = cpu_to_le32(tmp);  in oxygen_write32_masked()
100 static int oxygen_ac97_wait(struct oxygen *chip, unsigned int mask)  in oxygen_ac97_wait()  argument
105 	 * Reading the status register also clears the bits, so we have to save  in oxygen_ac97_wait()
108 	wait_event_timeout(chip->ac97_waitqueue,  in oxygen_ac97_wait()
109 			   ({ status |= oxygen_read8(chip, OXYGEN_AC97_INTERRUPT_STATUS);  in oxygen_ac97_wait()
114 	 * the AC'97 interrupt to be enabled.  in oxygen_ac97_wait()
116 	status |= oxygen_read8(chip, OXYGEN_AC97_INTERRUPT_STATUS);  in oxygen_ac97_wait()
117 	return status & mask ? 0 : -EIO;  in oxygen_ac97_wait()
121  * About 10% of AC'97 register reads or writes fail to complete, but even those
122  * where the controller indicates completion aren't guaranteed to have actually
125  * It's hard to assign blame to either the controller or the codec because both
126  * were made by C-Media ...
129 void oxygen_write_ac97(struct oxygen *chip, unsigned int codec,  in oxygen_write_ac97()  argument
140 	for (count = 5; count > 0; --count) {  in oxygen_write_ac97()
142 		oxygen_write32(chip, OXYGEN_AC97_REGS, reg);  in oxygen_write_ac97()
143 		/* require two "completed" writes, just to be sure */  in oxygen_write_ac97()
144 		if (oxygen_ac97_wait(chip, OXYGEN_AC97_INT_WRITE_DONE) >= 0 &&  in oxygen_write_ac97()
146 			chip->saved_ac97_registers[codec][index / 2] = data;  in oxygen_write_ac97()
154 u16 oxygen_read_ac97(struct oxygen *chip, unsigned int codec,  in oxygen_read_ac97()  argument
164 	for (count = 5; count > 0; --count) {  in oxygen_read_ac97()
166 		oxygen_write32(chip, OXYGEN_AC97_REGS, reg);  in oxygen_read_ac97()
168 		if (oxygen_ac97_wait(chip, OXYGEN_AC97_INT_READ_DONE) >= 0) {  in oxygen_read_ac97()
169 			u16 value = oxygen_read16(chip, OXYGEN_AC97_REGS);  in oxygen_read_ac97()
175 			 * Invert the register value bits to make sure that two  in oxygen_read_ac97()
187 void oxygen_write_ac97_masked(struct oxygen *chip, unsigned int codec,  in oxygen_write_ac97_masked()  argument
190 	u16 value = oxygen_read_ac97(chip, codec, index);  in oxygen_write_ac97_masked()
193 	oxygen_write_ac97(chip, codec, index, value);  in oxygen_write_ac97_masked()
197 void oxygen_write_spi(struct oxygen *chip, u8 control, unsigned int data)  in oxygen_write_spi()  argument
203 	while ((oxygen_read8(chip, OXYGEN_SPI_CONTROL) & OXYGEN_SPI_BUSY)  in oxygen_write_spi()
206 		--count;  in oxygen_write_spi()
209 	oxygen_write8(chip, OXYGEN_SPI_DATA1, data);  in oxygen_write_spi()
210 	oxygen_write8(chip, OXYGEN_SPI_DATA2, data >> 8);  in oxygen_write_spi()
212 		oxygen_write8(chip, OXYGEN_SPI_DATA3, data >> 16);  in oxygen_write_spi()
213 	oxygen_write8(chip, OXYGEN_SPI_CONTROL, control);  in oxygen_write_spi()
217 void oxygen_write_i2c(struct oxygen *chip, u8 device, u8 map, u8 data)  in oxygen_write_i2c()  argument
222 	oxygen_write8(chip, OXYGEN_2WIRE_MAP, map);  in oxygen_write_i2c()
223 	oxygen_write8(chip, OXYGEN_2WIRE_DATA, data);  in oxygen_write_i2c()
224 	oxygen_write8(chip, OXYGEN_2WIRE_CONTROL,  in oxygen_write_i2c()
229 static void _write_uart(struct oxygen *chip, unsigned int port, u8 data)  in _write_uart()  argument
231 	if (oxygen_read8(chip, OXYGEN_MPU401 + 1) & MPU401_TX_FULL)  in _write_uart()
233 	oxygen_write8(chip, OXYGEN_MPU401 + port, data);  in _write_uart()
236 void oxygen_reset_uart(struct oxygen *chip)  in oxygen_reset_uart()  argument
238 	_write_uart(chip, 1, MPU401_RESET);  in oxygen_reset_uart()
240 	_write_uart(chip, 1, MPU401_ENTER_UART);  in oxygen_reset_uart()
244 void oxygen_write_uart(struct oxygen *chip, u8 data)  in oxygen_write_uart()  argument
246 	_write_uart(chip, 0, data);  in oxygen_write_uart()
250 u16 oxygen_read_eeprom(struct oxygen *chip, unsigned int index)  in oxygen_read_eeprom()  argument
254 	oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,  in oxygen_read_eeprom()
258 		if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)  in oxygen_read_eeprom()
262 	return oxygen_read16(chip, OXYGEN_EEPROM_DATA);  in oxygen_read_eeprom()
265 void oxygen_write_eeprom(struct oxygen *chip, unsigned int index, u16 value)  in oxygen_write_eeprom()  argument
269 	oxygen_write16(chip, OXYGEN_EEPROM_DATA, value);  in oxygen_write_eeprom()
270 	oxygen_write8(chip, OXYGEN_EEPROM_CONTROL,  in oxygen_write_eeprom()
274 		if (!(oxygen_read8(chip, OXYGEN_EEPROM_STATUS)  in oxygen_write_eeprom()