diff options
| author | Manuel Lauss <manuel.lauss@googlemail.com> | 2009-11-02 21:21:44 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-02-27 12:53:01 +0100 |
| commit | 05ae3231801df8fdb4e1c0aa4aa6b8d7278eddde (patch) | |
| tree | 365411decb44bf15dcae5da42434c71cecc9acff /arch | |
| parent | 63323ec54a7e922a232c82070727e44eb1a5b43c (diff) | |
MIPS/SOUND: Alchemy: DB1200 AC97+I2S audio support.
Machine driver for DB1200 AC97 and I2S audio systems, intended as a proper
reference asoc machine for Alchemy-based systems. AC97/I2S can be selected
at boot time by setting switch S6.7.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Cc: alsa-devel@alsa-project.org
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/alchemy/devboards/db1200/platform.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/mips/alchemy/devboards/db1200/platform.c b/arch/mips/alchemy/devboards/db1200/platform.c index 5a6ef8deda1..d6b3e64376c 100644 --- a/arch/mips/alchemy/devboards/db1200/platform.c +++ b/arch/mips/alchemy/devboards/db1200/platform.c @@ -399,12 +399,43 @@ static struct platform_device db1200_spi_dev = { .resource = au1200_psc0_res, }; +static struct resource au1200_psc1_res[] = { + [0] = { + .start = PSC1_PHYS_ADDR, + .end = PSC1_PHYS_ADDR + 0x000fffff, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = AU1200_PSC1_INT, + .end = AU1200_PSC1_INT, + .flags = IORESOURCE_IRQ, + }, + [2] = { + .start = DSCR_CMD0_PSC1_TX, + .end = DSCR_CMD0_PSC1_TX, + .flags = IORESOURCE_DMA, + }, + [3] = { + .start = DSCR_CMD0_PSC1_RX, + .end = DSCR_CMD0_PSC1_RX, + .flags = IORESOURCE_DMA, + }, +}; + +static struct platform_device db1200_audio_dev = { + /* name assigned later based on switch setting */ + .id = 1, /* PSC ID */ + .num_resources = ARRAY_SIZE(au1200_psc1_res), + .resource = au1200_psc1_res, +}; + static struct platform_device *db1200_devs[] __initdata = { NULL, /* PSC0, selected by S6.8 */ &db1200_ide_dev, &db1200_eth_dev, &db1200_rtc_dev, &db1200_nand_dev, + &db1200_audio_dev, }; static int __init db1200_dev_init(void) @@ -419,6 +450,7 @@ static int __init db1200_dev_init(void) ARRAY_SIZE(db1200_i2c_devs)); /* SWITCHES: S6.8 I2C/SPI selector (OFF=I2C ON=SPI) + * S6.7 AC97/I2S selector (OFF=AC97 ON=I2S) */ /* NOTE: GPIO215 controls OTG VBUS supply. In SPI mode however @@ -456,6 +488,25 @@ static int __init db1200_dev_init(void) __raw_writel(pfc, (void __iomem *)SYS_PINFUNC); wmb(); + /* Audio: DIP7 selects I2S(0)/AC97(1), but need I2C for I2S! + * so: DIP7=1 || DIP8=0 => AC97, DIP7=0 && DIP8=1 => I2S + */ + sw &= BCSR_SWITCHES_DIP_8 | BCSR_SWITCHES_DIP_7; + if (sw == BCSR_SWITCHES_DIP_8) { + bcsr_mod(BCSR_RESETS, 0, BCSR_RESETS_PSC1MUX); + db1200_audio_dev.name = "au1xpsc_i2s"; + printk(KERN_INFO " S6.7 ON : PSC1 mode I2S\n"); + } else { + bcsr_mod(BCSR_RESETS, BCSR_RESETS_PSC1MUX, 0); + db1200_audio_dev.name = "au1xpsc_ac97"; + printk(KERN_INFO " S6.7 OFF: PSC1 mode AC97\n"); + } + + /* Audio PSC clock is supplied externally. (FIXME: platdata!!) */ + __raw_writel(PSC_SEL_CLK_SERCLK, + (void __iomem *)KSEG1ADDR(PSC1_PHYS_ADDR) + PSC_SEL_OFFSET); + wmb(); + db1x_register_pcmcia_socket(PCMCIA_ATTR_PSEUDO_PHYS, PCMCIA_ATTR_PSEUDO_PHYS + 0x00040000 - 1, PCMCIA_MEM_PSEUDO_PHYS, |