From: Alexander Sverdlin subaparts@yandex.ru
Add support for CS4271 SPI-connected CODEC on EDB93xx boards. Major rework based on code provided by H Hartley Sweeten hsweeten@visionengravers.com. Tested on EDB9302, others (EDB9301, EDB9302A, EDB9307A, EDB0315A) should work.
Signed-off-by: Alexander Sverdlin subaparts@yandex.ru --- arch/arm/mach-ep93xx/edb93xx.c | 117 ++++++++++++++++++++++++++++++++++++++++ 1 files changed, 117 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-ep93xx/edb93xx.c b/arch/arm/mach-ep93xx/edb93xx.c index 4b04316..f20be96 100644 --- a/arch/arm/mach-ep93xx/edb93xx.c +++ b/arch/arm/mach-ep93xx/edb93xx.c @@ -30,12 +30,22 @@ #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/i2c-gpio.h> +#include <linux/spi/spi.h> +#include <linux/delay.h> +#include <mach/ep93xx_spi.h>
#include <mach/hardware.h>
#include <asm/mach-types.h> #include <asm/mach/arch.h>
+#include <sound/cs4271.h> + +#define edb93xx_has_audio() (machine_is_edb9301() || \ + machine_is_edb9302() || \ + machine_is_edb9302a() || \ + machine_is_edb9307a() || \ + machine_is_edb9315a())
static void __init edb93xx_register_flash(void) { @@ -93,6 +103,111 @@ static void __init edb93xx_register_i2c(void)
/************************************************************************* + * EDB93xx SPI peripheral handling + *************************************************************************/ +static int edb93xx_cs4271_hw_setup(struct spi_device *spi) +{ + int gpio_nreset; + int err; + + if (machine_is_edb9301() || machine_is_edb9302()) { + gpio_nreset = EP93XX_GPIO_LINE_EGPIO1; + } else if (machine_is_edb9302a() || machine_is_edb9307a()) { + ep93xx_devcfg_set_bits(EP93XX_SYSCON_DEVCFG_HONIDE); + gpio_nreset = EP93XX_GPIO_LINE_DD2; + } else if (machine_is_edb9315a()) { + gpio_nreset = EP93XX_GPIO_LINE_EGPIO14; + } else { + return -EINVAL; + } + + err = gpio_request(gpio_nreset, spi->modalias); + if (err) + return err; + err = gpio_request(EP93XX_GPIO_LINE_EGPIO6, spi->modalias); + if (err) + return err; + + gpio_direction_output(EP93XX_GPIO_LINE_EGPIO6, 1); + + /* Reset codec */ + gpio_direction_output(gpio_nreset, 0); + udelay(1); + gpio_set_value(gpio_nreset, 1); + /* Give the codec time to wake up */ + udelay(1); + + return 0; +} + +static void edb93xx_cs4271_hw_cleanup(struct spi_device *spi) +{ + int gpio_nreset; + + if (machine_is_edb9301() || machine_is_edb9302()) + gpio_nreset = EP93XX_GPIO_LINE_EGPIO1; + else if (machine_is_edb9302a() || machine_is_edb9307a()) + gpio_nreset = EP93XX_GPIO_LINE_DD2; + else if (machine_is_edb9315a()) + gpio_nreset = EP93XX_GPIO_LINE_EGPIO14; + else + return; + + gpio_set_value(gpio_nreset, 0); + gpio_free(gpio_nreset); + + gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, 1); + gpio_free(EP93XX_GPIO_LINE_EGPIO6); +} + +static void edb93xx_cs4271_hw_cs_control(struct spi_device *spi, int value) +{ + gpio_set_value(EP93XX_GPIO_LINE_EGPIO6, value); +} + +static struct ep93xx_spi_chip_ops edb93xx_cs4271_hw = { + .setup = edb93xx_cs4271_hw_setup, + .cleanup = edb93xx_cs4271_hw_cleanup, + .cs_control = edb93xx_cs4271_hw_cs_control, +}; + +static struct spi_board_info edb93xx_spi_board_info[] __initdata = { + { + .modalias = "cs4271", + .controller_data = &edb93xx_cs4271_hw, + .max_speed_hz = 6000000, + .bus_num = 0, + .chip_select = 0, + .mode = SPI_MODE_3, + }, +}; + +static struct ep93xx_spi_info edb93xx_spi_info = { + .num_chipselect = ARRAY_SIZE(edb93xx_spi_board_info), +}; + +static void __init edb93xx_register_spi(void) +{ + if (edb93xx_has_audio()) { + ep93xx_register_spi(&edb93xx_spi_info, + edb93xx_spi_board_info, + ARRAY_SIZE(edb93xx_spi_board_info)); + } +} + + +/************************************************************************* + * EDB93xx I2S + *************************************************************************/ +static void __init edb93xx_register_i2s(void) +{ + if (edb93xx_has_audio()) { + ep93xx_register_i2s(); + } +} + + +/************************************************************************* * EDB93xx pwm *************************************************************************/ static void __init edb93xx_register_pwm(void) @@ -117,6 +232,8 @@ static void __init edb93xx_init_machine(void) edb93xx_register_flash(); ep93xx_register_eth(&edb93xx_eth_data, 1); edb93xx_register_i2c(); + edb93xx_register_spi(); + edb93xx_register_i2s(); edb93xx_register_pwm(); }