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Commit 2466226c authored by Andrey Filippov's avatar Andrey Filippov
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Implemented spread spectrum control

parent 0ca36687
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Showing with 545 additions and 18 deletions
drivers/misc/si5338.c
View file @ 2466226c
......@@ -35,8 +35,6 @@
#define SYSFS_READONLY 0444
#define SYSFS_WRITEONLY 0222
#define REG5338_PAGE 255
#define REG5338_PAGE_MASK 1
#define REG5338_DEV_CONFIG2 2
......@@ -50,6 +48,16 @@
#define INFREQMAX 710000000LL
#define INFREQDIV 40000000LL /* divide input frequency if above */
#define SPREAD_RATE_MIN 31500 /* 31.5 KHz */
#define SPREAD_RATE_MAX 63000 /* 63 KHz */
#define SPREAD_AMP_MIN 10 /* 0.1% */
#define SPREAD_AMP_MAX 500 /* 5.0% */
#define SPREAD_AMP_DENOM 10000 /* 0.01% amplitude step */
#define SPREAD_RATE_DFLT 31500 /* 31.5 KHz */
#define SPREAD_AMP_DFLT 50 /* 0.5% */
#define MSINT_MIN 8 /* not considering 4,6 */
#define MSINT_MAX 567
......@@ -228,14 +236,66 @@
#define AWE_SOFT_RESET 0xf602
#define AWE_MS0_SSUPP2_07_00 0x11fff
#define AWE_MS0_SSUPP2_14_08 0x1207f
#define AWE_MS0_SSUPP3_07_00 0x121ff /* set them to 0 - default==1 */
#define AWE_MS0_SSUPP3_14_08 0x1227f
#define AWE_MS0_SSUPP1_07_00 0x123ff
#define AWE_MS0_SSUPP1_11_08 0x1240f
#define AWE_MS0_SSUDP1_03_00 0x124f0
#define AWE_MS0_SSUDP1_11_04 0x125ff
#define AWE_MS0_SSDNP2_07_00 0x126ff
#define AWE_MS0_SSDNP2_14_08 0x1277f
#define AWE_MS0_SSDNP3_07_00 0x128ff
#define AWE_MS0_SSDNP3_14_08 0x1297f
#define AWE_MS0_SSDNP1_07_00 0x12aff
#define AWE_MS0_SSDNP1_11_08 0x12b0f
#define AWE_MS1_SSUPP2_07_00 0x12fff
#define AWE_MS1_SSUPP2_14_08 0x1307f
#define AWE_MS1_SSUPP3_07_00 0x131ff
#define AWE_MS1_SSUPP3_14_08 0x1327f
#define AWE_MS1_SSUPP1_07_00 0x133ff
#define AWE_MS1_SSUPP1_11_08 0x1340f
#define AWE_MS1_SSUDP1_03_00 0x134f0
#define AWE_MS1_SSUDP1_11_04 0x135ff
#define AWE_MS1_SSDNP2_07_00 0x136ff
#define AWE_MS1_SSDNP2_14_08 0x1377f
#define AWE_MS1_SSDNP3_07_00 0x138ff
#define AWE_MS1_SSDNP3_14_08 0x1397f
#define AWE_MS1_SSDNP1_07_00 0x13aff
#define AWE_MS1_SSDNP1_11_08 0x13b0f
#define AWE_MS2_SSUPP2_07_00 0x13fff
#define AWE_MS2_SSUPP2_14_08 0x1407f
#define AWE_MS2_SSUPP3_07_00 0x141ff
#define AWE_MS2_SSUPP3_14_08 0x1427f
#define AWE_MS2_SSUPP1_07_00 0x143ff
#define AWE_MS2_SSUPP1_11_08 0x1440f
#define AWE_MS2_SSUDP1_03_00 0x144f0
#define AWE_MS2_SSUDP1_11_04 0x145ff
#define AWE_MS2_SSDNP2_07_00 0x146ff
#define AWE_MS2_SSDNP2_14_08 0x1477f
#define AWE_MS2_SSDNP3_07_00 0x148ff
#define AWE_MS2_SSDNP3_14_08 0x1497f
#define AWE_MS2_SSDNP1_07_00 0x14aff
#define AWE_MS2_SSDNP1_11_08 0x14b0f
#define AWE_MS3_SSUPP2_07_00 0x14fff
#define AWE_MS3_SSUPP2_14_08 0x1507f
#define AWE_MS3_SSUPP3_07_00 0x151ff
#define AWE_MS3_SSUPP3_14_08 0x1527f
#define AWE_MS3_SSUPP1_07_00 0x153ff
#define AWE_MS3_SSUPP1_11_08 0x1540f
#define AWE_MS3_SSUDP1_03_00 0x154f0
#define AWE_MS3_SSUDP1_11_04 0x155ff
#define AWE_MS3_SSDNP2_07_00 0x156ff
#define AWE_MS3_SSDNP2_14_08 0x1577f
#define AWE_MS3_SSDNP3_07_00 0x158ff
#define AWE_MS3_SSDNP3_14_08 0x1597f
#define AWE_MS3_SSDNP1_07_00 0x15aff
#define AWE_MS3_SSDNP1_11_08 0x15b0f
......@@ -259,6 +319,9 @@ struct si5338_data_t {
u64 input_frequency3;
u64 input_frequency4;
u64 input_frequency56;
u32 ss_on_freq_change; /* 0 - disable SS when frequency is changed, 1 - update SS. +2 reset MS after starting SS*/
u32 spread_spectrum_rate[4]; /* in Hz */
u32 spread_spectrum_amp[4]; /* in 0.01% */
// u64 pll_frequency;
int reg_addr; /* used for raw register r/w */
int last_page; /* value of last page accessed (bit 0 of register 255) */
......@@ -364,11 +427,39 @@ static const char *pll_setup_names[]={"pll_freq_fract", "pll_freq_int", "pll_by_
static const char *out_freq_setup_names[]={
"out0_freq_fract", "out1_freq_fract", "out2_freq_fract", "out3_freq_fract",
"out0_freq_int", "out1_freq_int", "out2_freq_int", "out3_freq_int", NULL};
static u32 awe_msx_ssup3[4][3]=
{{AWE_MS0_SSUPP3_07_00,AWE_MS0_SSUPP3_14_08,0},
{AWE_MS1_SSUPP3_07_00,AWE_MS1_SSUPP3_14_08,0},
{AWE_MS2_SSUPP3_07_00,AWE_MS2_SSUPP3_14_08,0},
{AWE_MS3_SSUPP3_07_00,AWE_MS3_SSUPP3_14_08,0}};
static u32 awe_msx_ssup[4][3][3]=
{{{AWE_MS0_SSUPP1_07_00,AWE_MS0_SSUPP1_11_08,0},
{AWE_MS0_SSUPP2_07_00,AWE_MS0_SSUPP2_14_08,0},
{AWE_MS0_SSUPP3_07_00,AWE_MS0_SSUPP3_14_08,0}},
{{AWE_MS1_SSUPP1_07_00,AWE_MS1_SSUPP1_11_08,0},
{AWE_MS1_SSUPP2_07_00,AWE_MS1_SSUPP2_14_08,0},
{AWE_MS1_SSUPP3_07_00,AWE_MS1_SSUPP3_14_08,0}},
{{AWE_MS2_SSUPP1_07_00,AWE_MS2_SSUPP1_11_08,0},
{AWE_MS2_SSUPP2_07_00,AWE_MS2_SSUPP2_14_08,0},
{AWE_MS2_SSUPP3_07_00,AWE_MS2_SSUPP3_14_08,0}},
{{AWE_MS3_SSUPP1_07_00,AWE_MS3_SSUPP1_11_08,0},
{AWE_MS3_SSUPP2_07_00,AWE_MS3_SSUPP2_14_08,0},
{AWE_MS3_SSUPP3_07_00,AWE_MS3_SSUPP3_14_08,0}}};
static u32 awe_msx_ssdn[4][3][3]=
{{{AWE_MS0_SSDNP1_07_00,AWE_MS0_SSDNP1_11_08,0},
{AWE_MS0_SSDNP2_07_00,AWE_MS0_SSDNP2_14_08,0},
{AWE_MS0_SSDNP3_07_00,AWE_MS0_SSDNP3_14_08,0}},
{{AWE_MS1_SSDNP1_07_00,AWE_MS1_SSDNP1_11_08,0},
{AWE_MS1_SSDNP2_07_00,AWE_MS1_SSDNP2_14_08,0},
{AWE_MS1_SSDNP3_07_00,AWE_MS1_SSDNP3_14_08,0}},
{{AWE_MS2_SSDNP1_07_00,AWE_MS2_SSDNP1_11_08,0},
{AWE_MS2_SSDNP2_07_00,AWE_MS2_SSDNP2_14_08,0},
{AWE_MS2_SSDNP3_07_00,AWE_MS2_SSDNP3_14_08,0}},
{{AWE_MS3_SSDNP1_07_00,AWE_MS3_SSDNP1_11_08,0},
{AWE_MS3_SSDNP2_07_00,AWE_MS3_SSDNP2_14_08,0},
{AWE_MS3_SSDNP3_07_00,AWE_MS3_SSDNP3_14_08,0}}};
static u32 awe_msx_ssud[4][3]=
{{AWE_MS0_SSUDP1_03_00,AWE_MS0_SSUDP1_11_04,0},
{AWE_MS1_SSUDP1_03_00,AWE_MS1_SSUDP1_11_04,0},
{AWE_MS2_SSUDP1_03_00,AWE_MS2_SSUDP1_11_04,0},
{AWE_MS3_SSUDP1_03_00,AWE_MS3_SSUDP1_11_04,0}};
static const u32 awe_rdiv_in[]= {AWE_R0DIV_IN, AWE_R1DIV_IN, AWE_R2DIV_IN, AWE_R3DIV_IN};
static const u32 awe_rdiv_k[]= {AWE_R0DIV, AWE_R1DIV, AWE_R2DIV, AWE_R3DIV};
static const u32 awe_drv_fmt[]= {AWE_DRV0_FMT, AWE_DRV1_FMT, AWE_DRV2_FMT, AWE_DRV3_FMT};
......@@ -441,6 +532,15 @@ static ssize_t ms_abc_store(struct device *dev, struct device_attribute *attr, c
static ssize_t ms_powerdown_show (struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t ms_powerdown_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t ms_reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t ss_change_freq_mode_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t ss_change_freq_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t ss_vals_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t ss_vals_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t ss_regs_hex_show(struct device *dev, struct device_attribute *attr, char *buf);
static ssize_t ss_regs_hex_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t pre_init_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static ssize_t post_init_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
......@@ -503,12 +603,24 @@ static int get_out_frequency_txt(struct device *dev, char *buf, int chn);
static ssize_t output_config_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
static int configure_output_driver(struct device *dev, const char * name, int chn);
/* -------------------------------------- */
static int remove_common_factor(u64 * num_denom);
static int _verify_output_channel(struct i2c_client *client,int chn);
static int get_ss_vals(struct device *dev, char * buf, int chn);
static int get_ss_state(struct i2c_client *client, int chn);
static int set_ss_state(struct i2c_client *client, int state, int chn);
static int get_ss_down_rate(struct i2c_client *client, int chn);
static int get_ss_down_amplitude(struct i2c_client *client, int chn);
static int store_ss_down_parameters(struct i2c_client *client, u32 rate, u32 amp, int chn);
static int set_ss_down(struct i2c_client *client, int chn);
static int ss_pre_freq_change(struct i2c_client *client, int chn);
static int ss_post_freq_change(struct i2c_client *client, int chn);
static int calc_ss_down_to_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn);
static int get_ss_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn);
static int set_ss_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn);
static int disable_spread_spectrum(struct i2c_client *client,int chn);
static int enable_spread_spectrum(struct i2c_client *client,int chn);
static int get_drv_powerdown(struct i2c_client *client, int chn);
static int set_drv_powerdown(struct i2c_client *client, int typ, int chn);
static int get_drv_disable(struct i2c_client *client, int chn);
......@@ -538,6 +650,7 @@ static s64 get_output_src_frequency(struct i2c_client *client, u64 *out_freq, in
static int pre_init(struct i2c_client *client, int clear_all);
static int post_init(struct i2c_client *client, int timeout); /*1 in timeout ~ 0.1ms - i2c read register */
static int reset_ms(struct i2c_client *client, int wait_cycles);
static int get_status(struct i2c_client *client);
static int power_up_down_needed_ms(struct i2c_client *client);
static int disable_output(struct i2c_client *client, int chn);
......@@ -680,6 +793,7 @@ static DEVICE_ATTR(ms0_powerdown, SYSFS_PERMISSIONS, ms_powerdown_show, ms_po
static DEVICE_ATTR(ms1_powerdown, SYSFS_PERMISSIONS, ms_powerdown_show, ms_powerdown_store);
static DEVICE_ATTR(ms2_powerdown, SYSFS_PERMISSIONS, ms_powerdown_show, ms_powerdown_store);
static DEVICE_ATTR(ms3_powerdown, SYSFS_PERMISSIONS, ms_powerdown_show, ms_powerdown_store);
static DEVICE_ATTR(ms_reset, SYSFS_PERMISSIONS & SYSFS_WRITEONLY, NULL, ms_reset_store);
static struct attribute *multisynth_attrs[] = {
&dev_attr_ms0_p123.attr,
......@@ -696,6 +810,7 @@ static struct attribute *multisynth_attrs[] = {
&dev_attr_ms1_powerdown.attr,
&dev_attr_ms2_powerdown.attr,
&dev_attr_ms3_powerdown.attr,
&dev_attr_ms_reset.attr,
NULL
};
static const struct attribute_group dev_attr_multisynth_group = {
......@@ -703,6 +818,37 @@ static const struct attribute_group dev_attr_multisynth_group = {
.name = "multiSynth",
};
/* Spread spectrum group */
static DEVICE_ATTR(ss_change_freq_mode, SYSFS_PERMISSIONS, ss_change_freq_mode_show, ss_change_freq_mode_store);
static DEVICE_ATTR(ss0_values, SYSFS_PERMISSIONS, ss_vals_show, ss_vals_store);
static DEVICE_ATTR(ss1_values, SYSFS_PERMISSIONS, ss_vals_show, ss_vals_store);
static DEVICE_ATTR(ss2_values, SYSFS_PERMISSIONS, ss_vals_show, ss_vals_store);
static DEVICE_ATTR(ss3_values, SYSFS_PERMISSIONS, ss_vals_show, ss_vals_store);
static DEVICE_ATTR(ss0_regs_hex, SYSFS_PERMISSIONS, ss_regs_hex_show, ss_regs_hex_store);
static DEVICE_ATTR(ss1_regs_hex, SYSFS_PERMISSIONS, ss_regs_hex_show, ss_regs_hex_store);
static DEVICE_ATTR(ss2_regs_hex, SYSFS_PERMISSIONS, ss_regs_hex_show, ss_regs_hex_store);
static DEVICE_ATTR(ss3_regs_hex, SYSFS_PERMISSIONS, ss_regs_hex_show, ss_regs_hex_store);
static struct attribute *spread_spectrum_attrs[] = {
&dev_attr_ss_change_freq_mode.attr,
&dev_attr_ss0_values.attr,
&dev_attr_ss1_values.attr,
&dev_attr_ss2_values.attr,
&dev_attr_ss3_values.attr,
&dev_attr_ss0_regs_hex.attr,
&dev_attr_ss1_regs_hex.attr,
&dev_attr_ss2_regs_hex.attr,
&dev_attr_ss3_regs_hex.attr,
&dev_attr_ms_reset.attr,
NULL
};
static const struct attribute_group dev_attr_spread_spectrum_group = {
.attrs = spread_spectrum_attrs,
.name = "spread_spectrum",
};
static DEVICE_ATTR(pre_init, SYSFS_PERMISSIONS & SYSFS_WRITEONLY, NULL, pre_init_store);
static DEVICE_ATTR(pre_init_clear, SYSFS_PERMISSIONS & SYSFS_WRITEONLY, NULL, pre_init_store);
static DEVICE_ATTR(post_init, SYSFS_PERMISSIONS & SYSFS_WRITEONLY, NULL, post_init_store);
......@@ -1125,6 +1271,14 @@ static ssize_t output_description_show (struct device *dev, struct device_attrib
buf+=rc;
len+=rc;
//show spread spectum settings
rc=sprintf(buf,", ");
buf+=rc;
len+=rc;
if (((rc=get_ss_vals(dev, buf, i)))<0) return rc;
buf+=rc;
len+=rc;
rc=sprintf(buf,"\n");
buf+=rc;
len+=rc;
......@@ -1228,6 +1382,7 @@ static int si5338_sysfs_register(struct device *dev)
if (((retval = sysfs_create_group(&dev->kobj, &dev_attr_multisynth_group)))<0) return retval;
if (((retval = sysfs_create_group(&dev->kobj, &dev_attr_pll_group)))<0) return retval;
if (((retval = sysfs_create_group(&dev->kobj, &dev_attr_output_group)))<0) return retval;
if (((retval = sysfs_create_group(&dev->kobj, &dev_attr_spread_spectrum_group)))<0) return retval;
#ifdef GENERATE_EXTRA
if (((retval = sysfs_create_group(&dev->kobj, &dev_attr_output_extra_group)))<0) return retval;
#endif
......@@ -1676,6 +1831,124 @@ static ssize_t ms_powerdown_store(struct device *dev, struct device_attribute *a
return count;
}
static ssize_t ms_reset_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
reset_ms(client, 10);
return count;
}
static ssize_t ss_change_freq_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
{
int mode;
struct i2c_client *client = to_i2c_client(dev);
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
mode=clientdata->ss_on_freq_change;
switch (mode) {
case 0: return sprintf(buf, "%d - turn spread spectrum off on frequency change\n",mode);
case 1: return sprintf(buf, "%d - recalculate spread spectrum on frequency change, do not reset MS\n",mode);
case 2: return sprintf(buf, "%d - turn spread spectrum off on frequency change, reset MS when SS is turned on\n",mode);
case 3: return sprintf(buf, "%d - recalculate spread spectrum on frequency change, do not reset MS\n",mode);
default: return sprintf(buf, "%d - invalid mode\n",mode);
}
}
static ssize_t ss_change_freq_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int num_items, mode;
struct i2c_client *client = to_i2c_client(dev);
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
num_items=sscanf(buf, "%d", &mode);
if (num_items && (mode>=0) && (mode<=3)){
clientdata->ss_on_freq_change=mode;
return count;
}
return -EINVAL;
}
static ssize_t ss_vals_show(struct device *dev, struct device_attribute *attr, char *buf)
{
int chn,len;
if (((chn=get_chn_from_name(attr->attr.name)))<0) return chn;
if (((len= get_ss_vals(dev, buf, chn)))<0) return len;
sprintf (buf+len,"\n");
return len+1;
}
static ssize_t ss_vals_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int chn, rc, state, num_items;
u32 rate,amp;
struct i2c_client *client = to_i2c_client(dev);
if (((chn=get_chn_from_name(attr->attr.name)))<0) return chn;
/* get current values */
if (((state= get_ss_state(client, chn)))<0) return state;
if (((rate= get_ss_down_rate(client, chn)))<0) return rate;
if (((amp= get_ss_down_amplitude(client, chn)))<0) return amp;
num_items=sscanf(buf, "%d %d %d", &state, &rate, &amp);
if (num_items>1){
if (((rc= store_ss_down_parameters(client, rate, amp, chn)))<0) return rc;
}
if (num_items>0){
if (state) {
/* calculate and set SS registers */
if (((rc=set_ss_down(client, chn)))<0) return rc;
/* enable SS, optionally reset MS */
if (((rc=enable_spread_spectrum(client, chn)))<0) return rc;
} else {
if (((rc=disable_spread_spectrum(client, chn)))<0) return rc;
}
if (((rc=set_ss_state(client, 1, chn)))<0) return rc;
//static int enable_spread_spectrum(struct i2c_client *client,int chn)
}
return count;
}
static ssize_t ss_regs_hex_show(struct device *dev, struct device_attribute *attr, char *buf)
{
int chn, rc;
u32 regs[7];
u32 *updown_reg, *up_regs, *down_regs;
struct i2c_client *client = to_i2c_client(dev);
updown_reg=&regs[0];
down_regs=&regs[1];
up_regs=&regs[4];
if (((chn=get_chn_from_name(attr->attr.name)))<0) return chn;
if (((rc= get_ss_regs(client, up_regs, down_regs, updown_reg, chn)))<0) return rc;
return sprintf(buf, "updown_par=0x%x down_pars=0x%x 0x%x 0x%x up_pars= 0x%x 0x%x 0x%x\n",
regs[0], regs[1], regs[2], regs[3], regs[4], regs[5], regs[6]);
}
static ssize_t ss_regs_hex_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int chn, rc, num_items;
u32 regs[7];
u32 *updown_reg, *up_regs, *down_regs;
struct i2c_client *client = to_i2c_client(dev);
updown_reg=&regs[0];
down_regs=&regs[1];
up_regs=&regs[4];
if (((chn=get_chn_from_name(attr->attr.name)))<0) return chn;
if (((rc= get_ss_regs(client, up_regs, down_regs, updown_reg, chn)))<0) return rc;
num_items=sscanf(buf, "%x %x %x %x %x %x %x", &regs[0], &regs[1], &regs[2], &regs[3], &regs[4], &regs[5], &regs[6]);
if (num_items>0){
if (num_items<5) up_regs=NULL;
if (num_items<2) down_regs=NULL;
if (((rc= set_ss_regs(client, up_regs, down_regs, updown_reg, chn)))<0) return rc;
}
return count;
}
static ssize_t pre_init_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int rc,clear_all;
......@@ -2311,13 +2584,218 @@ static int _verify_output_channel(struct i2c_client *client,int chn)
return 0;
}
static int get_ss_vals(struct device *dev, char * buf, int chn)
{
int state;
u32 rate,amp;
struct i2c_client *client = to_i2c_client(dev);
if (((state= get_ss_state(client, chn)))<0) return state;
if (((amp= get_ss_down_amplitude(client, chn)))<0) return amp;
if (((rate= get_ss_down_rate(client, chn)))<0) return rate;
return sprintf(buf, "Spread spectrum is %s, down amplitude= %d ( *0.01%%), spread rate= %d Hz", state?"ON":"OFF", amp, rate);
}
static int get_ss_state(struct i2c_client *client, int chn)
{
int rc;
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
return read_field(client, awe_ms_ssmode[chn]);
}
static int set_ss_state(struct i2c_client *client, int state, int chn)
{
int rc;
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
return write_field(client, state , awe_ms_ssmode[chn]);
}
static int get_ss_down_rate(struct i2c_client *client, int chn)
{
int rc;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
return clientdata->spread_spectrum_rate[chn]; /* in Hz */
}
static int get_ss_down_amplitude(struct i2c_client *client, int chn)
{
int rc;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
return clientdata->spread_spectrum_amp[chn];
}
/* store required parameters - they will be needed to recalculate SS registers after MS frequency change */
static int store_ss_down_parameters(struct i2c_client *client, u32 rate, u32 amp, int chn) /* chn 0,1,2,3 */
{
int rc;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
if ((rate < SPREAD_RATE_MIN) || (rate > SPREAD_RATE_MAX)){
dev_err(&client->dev, "Invalid spread spectrum rate %u - should be in [%u,%u]Hz\n",rate,SPREAD_RATE_MIN,SPREAD_AMP_MAX);
return - EINVAL;
}
if ((amp < SPREAD_AMP_MIN) || (amp > SPREAD_AMP_MAX)){
dev_err(&client->dev, "Invalid spread spectrum amplitude %u - should be in [%u,%u] (*0.01%%)\n",amp,SPREAD_AMP_MIN,SPREAD_AMP_MAX);
return - EINVAL;
}
clientdata->spread_spectrum_rate[chn]=rate; /* in Hz */
clientdata->spread_spectrum_amp[chn]=amp; /* in 0.01% */
return 0;
}
/* recalculate and set SS registers, disable SS if invalid */
static int set_ss_down(struct i2c_client *client, int chn) /* chn 0,1,2,3 */
{
int rc;
u32 ssud,ssup[3],ssdn[3];
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
/* calculate spread spectrum registers */
if (((rc=calc_ss_down_to_regs(client, ssup, ssdn, &ssud, chn)))<0) return rc;
if (rc!=0){
return disable_spread_spectrum(client,chn); /* SS parameters were never set*/
}
/* set spread spectrum registers */
if (((rc=set_ss_regs(client, ssup, ssdn, &ssud, chn)))<0) return rc;
#if 0
/* enable spread spectrum mode */
if (((rc=enable_spread_spectrum(client, chn)))<0) return rc;
#endif
return 0;
}
static int ss_pre_freq_change(struct i2c_client *client, int chn) /* chn 0,1,2,3 */
{
int rc;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
if ((clientdata->ss_on_freq_change & 1)==0) {
dev_dbg(&client->dev, "Disabling spread spectrum before changing MS%d divider",chn);
if (((rc=disable_spread_spectrum(client, chn)))<0) return rc;
}
return 0;
}
static int ss_post_freq_change(struct i2c_client *client, int chn) /* chn 0,1,2,3 */
{
int rc, ss_state;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
if (((ss_state=get_ss_state(client,chn)))<0) return ss_state;
if (ss_state){
/* recalculate and set SS registers */
dev_dbg(&client->dev, "Recalculating spread spectrum after changing MS%d divider",chn);
if (((rc=set_ss_down(client,chn)))<0) return rc;
if (clientdata->ss_on_freq_change & 2) {
reset_ms(client, 10);
}
}
return 0;
}
static int calc_ss_down_to_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn) /* chn 0,1,2,3 */
{
int rc;
u32 ssud;
u64 ms_freq, xy[2];
u32 p123[3];
u64 ms[3];
u32 rate, amp;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
rate=clientdata->spread_spectrum_rate[chn]; /* in Hz */
amp=clientdata->spread_spectrum_amp[chn]; /* in 0.01% */
if ((rate==0) || (amp==0)) return 1; /* Should disable SS */
if ((rate < SPREAD_RATE_MIN) || (rate > SPREAD_RATE_MAX)){
dev_err(&client->dev, "*Invalid spread spectrum rate %u - should be in [%u,%u]Hz\n",rate,SPREAD_RATE_MIN,SPREAD_AMP_MAX);
return - EINVAL;
}
if ((amp < SPREAD_AMP_MIN) || (amp > SPREAD_AMP_MAX)){
dev_err(&client->dev, "*Invalid spread spectrum amplitude %u - should be in [%u,%u] (*0.01%%)\n",amp,SPREAD_AMP_MIN,SPREAD_AMP_MAX);
return - EINVAL;
}
if (((rc=get_pll_ms_freq(client, &ms_freq, chn)))<0) return rc;
if (ms_freq==0){
dev_err(&client->dev, "MS%d frequency is not set, can not apply spread spectrum\n",chn);
return - EINVAL;
}
if (((rc=get_ms_p123(client,p123, chn)))<0) return rc;
p123_to_ms(ms,p123);
ssud=(u32) div64_u64(ms_freq,rate << 2);
if (updown_reg) updown_reg[0]= ssud;
if (down_regs){
xy[0]=6400000000LL*(ms[0]*ms[2]+ms[1]);
xy[0]=div64_u64(xy[0],ms[2]);
xy[1]= 100000000LL*(10000-amp)*ssud;
remove_common_factor(xy);
down_regs[0]= (u32) div64_u64(xy[0],xy[1]);
down_regs[2]= (u32)xy[1];
down_regs[1]= (u32)xy[0] - down_regs[2]*down_regs[0];
}
if (up_regs){
up_regs[0]=0;
up_regs[1]=1;
up_regs[2]=0;
}
return 0;
}
static int get_ss_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn) /* chn 0,1,2,3 */
{
int i;
s64 rc;
if (((rc=_verify_output_channel(client,chn)))<0) return (int) rc;
if (up_regs) for (i=0;i<3;i++){
if (((rc=read_multireg64 (client, awe_msx_ssup[chn][i])))<0) return (int) rc;
up_regs[i]= (u32) rc;
}
if (down_regs) for (i=0;i<3;i++){
if (((rc=read_multireg64 (client, awe_msx_ssdn[chn][i])))<0) return (int) rc;
down_regs[i]= (u32) rc;
}
if (updown_reg) {
if (((updown_reg[0]=read_multireg64 (client, awe_msx_ssud[chn])))<0) return (int) updown_reg[0];
}
return 0;
}
static int set_ss_regs(struct i2c_client *client, u32 * up_regs, u32 * down_regs, u32 * updown_reg, int chn) /* chn 0,1,2,3, */
{
int i,rc;
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
if (up_regs) for (i=0;i<3;i++){
if (((rc=write_multireg64 (client, (u64) up_regs[i], awe_msx_ssup[chn][i])))<0) return rc;
}
if (down_regs) for (i=0;i<3;i++){
if (((rc=write_multireg64 (client, (u64) down_regs[i], awe_msx_ssdn[chn][i])))<0) return rc;
}
if (updown_reg) {
if (((rc=write_multireg64 (client, (u64) updown_reg[0], awe_msx_ssud[chn])))<0) return rc;
}
return 0;
}
static int disable_spread_spectrum(struct i2c_client *client,int chn)
{
int rc;
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
/* disable spread spectrum - only this register was changed to 0 from default 1 */
if (((rc=write_multireg64(client, 0 , awe_msx_ssup3[chn])))<0) return rc;
if (((rc=write_field(client, 0 , awe_ms_ssmode[chn])))<0) return rc;
if (((rc=write_multireg64(client, 0 , awe_msx_ssup[chn][2])))<0) return rc;
if (((rc=set_ss_state(client, 0, chn)))<0) return rc;
return 0;
}
static int enable_spread_spectrum(struct i2c_client *client,int chn)
{
int rc;
struct si5338_data_t *clientdata = i2c_get_clientdata(client);
if (((rc=_verify_output_channel(client,chn)))<0) return rc;
if (((rc=set_ss_state(client, 1, chn)))<0) return rc;
if (clientdata->ss_on_freq_change & 2) {
if (((rc=reset_ms(client, 10)))<0) return rc; /* 10 - wait cycles */
}
return 0;
}
......@@ -2855,15 +3333,23 @@ static int post_init(struct i2c_client *client, int timeout) /*1 in timeout ~ 0.
if (((rc=write_field(client, 5, AWE_REG47_72 )))<0) return rc; /* set 47[7:2] to 000101b */
if (((rc=write_field(client, 1, AWE_FCAL_OVRD_EN )))<0) return rc; /* SET PLL to use FCAL values, set FCAL_OVRD_EN=1 */
/* only needed if using down-spread. Won't hurt to do anyway */
if (((rc=write_field(client, 1, AWE_MS_RESET )))<0) return rc; /* SET MS RESET=1 */
for (i=0;i<10;i++) get_status(client); /* wait 1 ms */
if (((rc=write_field(client, 0, AWE_MS_RESET )))<0) return rc; /* SET MS RESET=0 */
if (((rc=reset_ms(client, 10)))<0) return rc;
if (((rc=write_field(client, 0, AWE_OUT_ALL_DIS )))<0) return rc; /* enable all (enabled individually) outputs */
write_field(client, 0, AWE_SOFT_RESET ); /* Not documented - what to do with the soft reset bit - clearing */
if (((rc=power_up_down_needed_ms(client)))<0) return rc;
return 0;
}
static int reset_ms(struct i2c_client *client, int wait_cycles)
{
int i,rc;
dev_dbg(&client->dev, "Resetting MS dividers");
if (((rc=write_field(client, 1, AWE_MS_RESET )))<0) return rc; /* SET MS RESET=1 */
for (i=0;i<wait_cycles;i++) get_status(client); /* wait 1 ms */
if (((rc=write_field(client, 0, AWE_MS_RESET )))<0) return rc; /* SET MS RESET=0 */
return 0;
}
static int get_status(struct i2c_client *client)
{
return read_field(client,AWE_STATUS);
......@@ -3092,13 +3578,20 @@ static int set_ms_p123(struct i2c_client *client,u32 * p123, int chn) /* chn 0,1
else p123[0]=256;
p123[1]=0;
p123[2]=1;
dev_info(&client->dev, "Using high speed divisor option on channel",chn);
dev_info(&client->dev, "Using high speed divisor option on ms%d",chn);
} else hs=0;
if (((rc=write_field(client, hs, awe_ms_hs[chn])))<0) return rc;
/* optionally disable spread spectrum before changing frequency */
if (chn<4){
if (((rc=ss_pre_freq_change(client, chn)))<0) return rc;
}
for (i=0;i<3;i++){
if (((rc=write_multireg64(client, (u64) p123[i], awe_msx[chn][i])))<0) return rc;
}
/* optionally enable spread spectrum after changing frequency, reset MS */
if (chn<4){
if (((rc=ss_post_freq_change(client, chn)))<0) return rc;
}
return 0;
}
......@@ -3852,6 +4345,7 @@ static void si5338_init_of(struct i2c_client *client)
u16 page_reg;
char buf[40];
u64 freq[3];
u32 rate,amp;
struct si5338_setup_data {
u8 page;
u8 reg;
......@@ -3998,6 +4492,34 @@ static void si5338_init_of(struct i2c_client *client)
}
}
}
/* setting spread spectrum parameters */
for (n=0;n<4;n++){
sprintf(buf,"si5338,spread_spectrum_%d",n);
config_data = of_get_property(client->dev.of_node, buf, &len);
if (config_data && (len>0)){
len /= sizeof(*config_data);
rate=get_ss_down_rate(client, n);
amp= get_ss_down_amplitude(client, n);
if (len>1) amp = be32_to_cpup(&config_data[1]);
if (len>2) rate = be32_to_cpup(&config_data[2]);
if (store_ss_down_parameters(client, rate, amp, n)==0){
dev_info(&client->dev,"Set spread spectrum parameters for MS%d, amplitude=%d (*0.01%%), rate=%d Hz, %s\n",
n,amp,rate,config_data[0]?"ON":"OFF");
} else {
dev_err(&client->dev,"Failed to set spread spectrum parameters for MS%d, amplitude=%d (*0.01%%), rate=%d Hz, %s\n",
n,amp,rate,config_data[0]?"ON":"OFF");
continue;
}
if (config_data[0]){ /* enable SS */
if ((set_ss_down(client, n)==0) && /* calculate and set SS registers */
(set_ss_state(client, 1, n)==0)){ // enable SS. Not using enable_spread_spectrum() as we'll reset MS later anyway
dev_info(&client->dev,"Spread spectrum enabled for MS%d\n",n);
} else {
dev_info(&client->dev,"Fail to enable spread spectrum for MS%d\n",n);
}
}
}
}
} else {
dev_info(&client->dev,"Device tree data not found for %s\n",client->name);
}
......@@ -4056,11 +4578,16 @@ static int si5338_i2c_probe(struct i2c_client *client,
clientdata->input_frequency3=0;
clientdata->input_frequency4=0;
clientdata->input_frequency56=0;
clientdata->ss_on_freq_change=0; /* 0 - disable SS when frequency is changed, 1 - update SS. +2 reset MS after starting SS*/
for (i=0;i<4;i++){
clientdata->spread_spectrum_rate[i]=SPREAD_RATE_DFLT; /* 31.5 KHz */
clientdata->spread_spectrum_amp[i]=SPREAD_AMP_DFLT; /* 0.5% */
}
si5338_init_of(client);
return 0;
}
static int si5338_i2c_remove(struct i2c_client *client)
{
return 0;
......
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