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Apply FS #11423 - Use udelay in AMS driver for FM radio I2C

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27035 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Bertrik Sikken 2010-06-21 21:41:07 +00:00
parent 06b9064205
commit 2062270964
3 changed files with 105 additions and 121 deletions
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101
firmware/target/arm/as3525/fmradio-i2c-as3525.c
View file

@ -28,6 +28,7 @@
*/
#include "as3525.h"
#include "system.h"
#include "generic_i2c.h"
#include "fmradio_i2c.h"
@ -77,85 +78,75 @@
static int fm_i2c_bus;
static void fm_scl_hi(void)
static void fm_scl_dir(bool out)
{
I2C_SCL_GPIO(I2C_SCL_PIN) = 1 << I2C_SCL_PIN;
if (out) {
I2C_SCL_GPIO_DIR |= 1 << I2C_SCL_PIN;
} else {
I2C_SCL_GPIO_DIR &= ~(1 << I2C_SCL_PIN);
}
}
static void fm_scl_lo(void)
static void fm_sda_dir(bool out)
{
I2C_SCL_GPIO(I2C_SCL_PIN) = 0;
if (out) {
I2C_SDA_GPIO_DIR |= 1 << I2C_SDA_PIN;
} else {
I2C_SDA_GPIO_DIR &= ~(1 << I2C_SDA_PIN);
}
}
static void fm_sda_hi(void)
static void fm_scl_out(bool level)
{
I2C_SDA_GPIO(I2C_SDA_PIN) = 1 << I2C_SDA_PIN;
if (level) {
I2C_SCL_GPIO(I2C_SCL_PIN) = 1 << I2C_SCL_PIN;
} else {
I2C_SCL_GPIO(I2C_SCL_PIN) = 0;
}
}
static void fm_sda_lo(void)
static void fm_sda_out(bool level)
{
I2C_SDA_GPIO(I2C_SDA_PIN) = 0;
if (level) {
I2C_SDA_GPIO(I2C_SDA_PIN) = 1 << I2C_SDA_PIN;
} else {
I2C_SDA_GPIO(I2C_SDA_PIN) = 0;
}
}
static void fm_sda_input(void)
{
I2C_SDA_GPIO_DIR &= ~(1 << I2C_SDA_PIN);
}
static void fm_sda_output(void)
{
I2C_SDA_GPIO_DIR |= 1 << I2C_SDA_PIN;
}
static void fm_scl_input(void)
{
I2C_SCL_GPIO_DIR &= ~(1 << I2C_SCL_PIN);
}
static void fm_scl_output(void)
{
I2C_SCL_GPIO_DIR |= 1 << I2C_SCL_PIN;
}
static int fm_sda(void)
{
return I2C_SDA_GPIO(I2C_SDA_PIN);
}
static int fm_scl(void)
static bool fm_scl_in(void)
{
return I2C_SCL_GPIO(I2C_SCL_PIN);
}
/* simple and crude delay, used for all delays in the generic i2c driver */
static void fm_delay(void)
static bool fm_sda_in(void)
{
volatile int i;
return I2C_SDA_GPIO(I2C_SDA_PIN);
}
/* this loop is uncalibrated and could use more sophistication */
for (i = 0; i < 20; i++) {
static void fm_delay(int delay)
{
if (delay != 0) {
udelay(delay);
}
}
/* interface towards the generic i2c driver */
static const struct i2c_interface fm_i2c_interface = {
.scl_hi = fm_scl_hi,
.scl_lo = fm_scl_lo,
.sda_hi = fm_sda_hi,
.sda_lo = fm_sda_lo,
.sda_input = fm_sda_input,
.sda_output = fm_sda_output,
.scl_input = fm_scl_input,
.scl_output = fm_scl_output,
.scl = fm_scl,
.sda = fm_sda,
.scl_out = fm_scl_out,
.scl_dir = fm_scl_dir,
.sda_out = fm_sda_out,
.sda_dir = fm_sda_dir,
.sda_in = fm_sda_in,
.scl_in = fm_scl_in,
.delay = fm_delay,
.delay_hd_sta = fm_delay,
.delay_hd_dat = fm_delay,
.delay_su_dat = fm_delay,
.delay_su_sto = fm_delay,
.delay_su_sta = fm_delay,
.delay_thigh = fm_delay
.delay_hd_sta = 1,
.delay_hd_dat = 0,
.delay_su_dat = 1,
.delay_su_sto = 1,
.delay_su_sta = 1,
.delay_thigh = 2
};
/* initialise i2c for fmradio */