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Commit 8635e7a1 authored by Andrey Filippov's avatar Andrey Filippov
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si5338.c: added cached register r/w

parent c6c56bf2
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Showing with 67 additions and 32 deletions
recipes-kernel/linux/linux-xlnx/vsc3304.patch
View file @ 8635e7a1
Index: git/drivers/misc/Kconfig
===================================================================
--- git.orig/drivers/misc/Kconfig 2013-12-03 15:26:18.686938629 -0700
+++ git/drivers/misc/Kconfig 2013-12-03 15:26:21.590938659 -0700
--- git.orig/drivers/misc/Kconfig 2013-12-03 22:30:26.775202584 -0700
+++ git/drivers/misc/Kconfig 2013-12-03 22:30:29.923202617 -0700
@@ -549,6 +549,19 @@
their requirements.
......@@ -24,8 +24,8 @@ Index: git/drivers/misc/Kconfig
source "drivers/misc/eeprom/Kconfig"
Index: git/drivers/misc/Makefile
===================================================================
--- git.orig/drivers/misc/Makefile 2013-12-03 15:26:18.686938629 -0700
+++ git/drivers/misc/Makefile 2013-12-03 15:26:21.590938659 -0700
--- git.orig/drivers/misc/Makefile 2013-12-03 22:30:26.775202584 -0700
+++ git/drivers/misc/Makefile 2013-12-03 22:30:29.923202617 -0700
@@ -55,3 +55,5 @@
obj-$(CONFIG_LATTICE_ECP3_CONFIG) += lattice-ecp3-config.o
obj-$(CONFIG_SRAM) += sram.o
......@@ -35,7 +35,7 @@ Index: git/drivers/misc/Makefile
Index: git/drivers/misc/vsc330x.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ git/drivers/misc/vsc330x.c 2013-12-03 15:26:21.594938659 -0700
+++ git/drivers/misc/vsc330x.c 2013-12-03 22:30:29.927202617 -0700
@@ -0,0 +1,872 @@
+/*!***************************************************************************
+ *! FILE NAME : vsc330x.c
......@@ -912,8 +912,8 @@ Index: git/drivers/misc/vsc330x.c
Index: git/drivers/misc/si5338.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ git/drivers/misc/si5338.c 2013-12-03 22:08:01.215188627 -0700
@@ -0,0 +1,1759 @@
+++ git/drivers/misc/si5338.c 2013-12-04 00:39:19.615282791 -0700
@@ -0,0 +1,1794 @@
+/*!***************************************************************************
+ *! FILE NAME : si5338.c
+ *! DESCRIPTION: control of the Silicon Laboratories SI5338 clock generator
......@@ -957,7 +957,7 @@ Index: git/drivers/misc/si5338.c
+#define REG5338_DEV_CONFIG2 2
+#define REG5338_DEV_CONFIG2_MASK 0x3f
+#define REG5338_DEV_CONFIG2_VAL 38 /* last 2 digits of part number */
+
+#define LAST_REG 347
+
+#define FVCOMIN 2200000000LL
+#define FVCOMAX 2840000000LL
......@@ -1081,6 +1081,23 @@ Index: git/drivers/misc/si5338.c
+#define AWE_MISC_06B 0x0602 /* write 0x0 */
+#define AWE_MISC_28 0x1cc0 /* write 0x0 */
+
+#define CACHE_INIT 1
+#define CACHE_VOLAT 2
+
+struct si5338_cache_t {
+ u8 flags;
+ u8 data;
+};
+struct si5338_data_t {
+ u64 input_frequency;
+// 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) */
+ struct mutex lock;
+ struct si5338_cache_t cache[LAST_REG+1];
+};
+
+
+static void si5338_init_of(struct i2c_client *client);
+
+
......@@ -1337,15 +1354,6 @@ Index: git/drivers/misc/si5338.c
+};
+
+
+struct si5338_data_t {
+ u64 input_frequency;
+ 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) */
+ struct mutex lock;
+};
+
+
+static int si5338_sysfs_register(struct device *dev)
+{
+// struct i2c_client *client = to_i2c_client(dev);
......@@ -1422,10 +1430,10 @@ Index: git/drivers/misc/si5338.c
+
+static ssize_t raw_hex_all_show (struct device *dev, struct device_attribute *attr, char *buf)
+{
+ int low_addr=0,reg,data,rc,high_addr=348,len=0, count=PAGE_SIZE;
+ int low_addr=0,reg,data,rc,len=0, count=PAGE_SIZE;
+ struct i2c_client *client = to_i2c_client(dev);
+// struct si5338_data_t *clientdata= i2c_get_clientdata(client);
+ for (reg=low_addr;reg<high_addr;reg++) if (count>10){
+ for (reg=low_addr;reg<=LAST_REG;reg++) if (count>10){
+ if ((reg & 0xf) ==0){
+ rc=sprintf(buf, "%03x: ",reg);
+ buf+=rc;
......@@ -1437,7 +1445,7 @@ Index: git/drivers/misc/si5338.c
+ buf+=rc;
+ len+=rc;
+ count-=rc;
+ if (((reg & 0xf) == 0xf) || (reg==(high_addr-1))){
+ if (((reg & 0xf) == 0xf) || (reg==LAST_REG)){
+ rc=sprintf(buf, "\n");
+ } else {
+ rc=sprintf(buf, " ");
......@@ -1932,7 +1940,7 @@ Index: git/drivers/misc/si5338.c
+ */
+ u64 d;
+ u64 ms_denom=ms[2], ms_nom=ms[1], ms_int=ms[0];
+ while (ms_denom >= (1<<30)) { /* will not happen with current frequency values specified in integer Hz */
+ while ((ms_denom >= (1<<30))| (((ms_denom | ms_nom) &1) == 0)) {
+ ms_denom >>= 1;
+ ms_nom >>= 1;
+ }
......@@ -2088,8 +2096,8 @@ Index: git/drivers/misc/si5338.c
+ /* use r-divider if the output frequency is too low (less than 5 MHz) */
+ u64 out_int=out_freq[0],out_nom=out_freq[1],out_denom=out_freq[2],
+ pll_out_freq[3], scaled_max,scaled_min,d;
+ s64 pll_freq_scaled, out_freq_scaled,err,best_err=-1,out_div,pll_in_freq,in_div,best_in_div,
+ pll_in_freq_scaled,synth_out_scaled;
+ s64 pll_freq_scaled, out_freq_scaled,err,best_err=-1,center_scaled,center_diff,best_center_diff,
+ out_div,pll_in_freq,in_div,best_in_div, pll_in_freq_scaled,synth_out_scaled;
+ int r_div=1;
+ if (out_denom==0){
+ dev_err(&client->dev, "Denominator should not be 0 in %lld+%lld/%lld\n",
......@@ -2142,29 +2150,34 @@ Index: git/drivers/misc/si5338.c
+ out_int, out_nom,out_denom);
+ return -EINVAL;
+ }
+// pll_out_freq=div64_u64(out_freq_scaled*out_div+(out_denom>>1),out_denom);
+ pll_out_freq[0]=div64_u64(out_freq_scaled*out_div,out_denom);
+ pll_out_freq[1]=(out_freq_scaled*out_div)-pll_out_freq[0]*out_denom;
+ pll_out_freq[2]=out_denom;
+
+ dev_dbg(&client->dev, "PLL output divider by %llu, pll frequency: %llu+%llu/%llu Hz\n",
+ out_div,pll_out_freq[0],pll_out_freq[1],pll_out_freq[2]);
+ return set_pll_freq(client, pll_out_freq, 0);
+ } else { /* if (int_msn_div==0), find the best pair of integer coefficients */
+ } else { /* if (int_msn_div==0), find the best pair of integer coefficients, try closest to the center, if possible */
+ pll_in_freq=get_pll_in_frequency(client);
+ pll_in_freq_scaled=pll_in_freq*out_denom;
+ center_scaled=((FVCOMAX+FVCOMIN)>>1)*out_denom;
+ if (pll_in_freq<0) return (int) pll_in_freq;
+ best_in_div=0;
+ for (out_div=4;out_div<=MSINT_MAX;out_div++) if ((out_div!=5) && (out_div!=7)){
+ pll_freq_scaled=out_freq_scaled*out_div; /* here scaled by denominator */
+ if ((pll_freq_scaled>=scaled_min) && (pll_freq_scaled<=scaled_max)) {
+ in_div=div64_u64(pll_freq_scaled+(pll_in_freq_scaled>>1),pll_in_freq_scaled); // round
+ synth_out_scaled=div64_u64(pll_in_freq_scaled*in_div+ (out_div>>1),out_div);
+ d=pll_in_freq_scaled*in_div; /* actual pll frequency scaled by out_denom */
+ synth_out_scaled=div64_u64(d + (out_div>>1),out_div);
+ center_diff=d-center_scaled;
+ if (center_diff<0) center_diff=-center_diff;
+ err=synth_out_scaled-out_freq_scaled;
+ if (err<0) err=-err;
+ if ((best_in_div==0) || (err < best_err)){
+ if ((best_in_div==0) || (err < best_err) || ((err == best_err) && (center_diff<best_center_diff))){
+ dev_dbg(&client->dev, "synth_out_scaled: %lld center_scaled: %lld out_freq_scaled:%lld err: %lld (%lld) center_diff:%lld(%lld)\n",
+ synth_out_scaled, center_scaled, out_freq_scaled,err,best_err,center_diff,best_center_diff);
+ best_err=err;
+ best_in_div=in_div;
+ best_center_diff=center_diff;
+ }
+ }
+ }
......@@ -2173,15 +2186,15 @@ Index: git/drivers/misc/si5338.c
+ pll_in_freq);
+
+ }
+// pll_out_freq=div64_u64(pll_in_freq_scaled*best_in_div+(out_denom>>1),out_denom);
+ pll_out_freq[0]=div64_u64(pll_in_freq_scaled*best_in_div,out_denom);
+ pll_out_freq[1]=(pll_in_freq_scaled*best_in_div)-pll_out_freq[0]*out_denom;
+ pll_out_freq[2]=out_denom;
+ dev_dbg(&client->dev, "PLL output frequency: %llu+%llu/%llu Hz, MS input divider: %lld, MS output divider: %lld\n",
+ pll_out_freq[0],pll_out_freq[1],pll_out_freq[2], best_in_div, out_div);
+ return set_pll_freq(client, pll_out_freq, 0); /* integer result */
+ return set_pll_freq(client, pll_out_freq, 1); /* integer result */
+ }
+}
+
+static int get_pll_ms_freq(struct i2c_client *client, u64 *out_freq, int chn)
+{
+ int rc;
......@@ -2207,6 +2220,7 @@ Index: git/drivers/misc/si5338.c
+ out_freq[2]=ms[0]*pll_out_freq[2];
+ out_freq[0]=div64_u64(out_freq[1],out_freq[2]);
+ out_freq[1]-=out_freq[0]*out_freq[2];
+ if (out_freq[1]==0) out_freq[2]=1;
+ dev_dbg(&client->dev, "MS%d output frequency: %llu+%llu/%llu Hz\n",chn,out_freq[0],out_freq[1],out_freq[2]);
+ return 0;
+}
......@@ -2235,6 +2249,9 @@ Index: git/drivers/misc/si5338.c
+ out_int+=d;
+ out_nom-=d*out_denom;
+ }
+ if (out_nom==0){
+ out_denom=1;
+ }
+ if (out_int<(FVCOMAX/MSINT_MAX)){
+ while ((r_div < 32) && (out_int<(FVCOMAX/MSINT_MAX))){
+ out_int<<=1;
......@@ -2507,6 +2524,10 @@ Index: git/drivers/misc/si5338.c
+// dev_dbg(&client->dev,"changing page: new=0x%x, was=0x%x\n",val & REG5338_PAGE_MASK,clientdata->last_page);
+ clientdata->last_page=val & REG5338_PAGE_MASK;
+ }
+ if (clientdata && (reg<=LAST_REG) ){
+ clientdata->cache[reg].data= val;
+ clientdata->cache[reg].flags |= CACHE_INIT;
+ }
+ return i2c_smbus_write_byte_data(client, reg, val);
+}
+
......@@ -2532,6 +2553,10 @@ Index: git/drivers/misc/si5338.c
+{
+ int rc,page;
+ struct si5338_data_t *clientdata = i2c_get_clientdata(client);
+ if (clientdata && (reg<=LAST_REG) && (clientdata->cache[reg].flags & CACHE_INIT) && !(clientdata->cache[reg].flags & CACHE_VOLAT)){
+ dev_dbg(&client->dev,"Using cached register: reg=0x%x -> 0x%x\n",reg,(int) clientdata->cache[reg].data);
+ return clientdata->cache[reg].data;
+ }
+ page=(reg >> 8) & REG5338_PAGE_MASK;
+// dev_dbg(&client->dev,"reading i2c device : slave=0x%x, reg=0x%x page=0x%x, last_page=0x%x\n",(int) (client->addr),reg,page,clientdata->last_page);
+ if (clientdata && (reg!=REG5338_PAGE) && (page != clientdata->last_page)) { /* set page if needed */
......@@ -2543,8 +2568,14 @@ Index: git/drivers/misc/si5338.c
+ if (clientdata && (reg==REG5338_PAGE)) {
+ clientdata->last_page= rc & REG5338_PAGE_MASK;
+ }
+ if (clientdata && (reg<=LAST_REG)){
+ clientdata->cache[reg].data= (u8) rc;
+ clientdata->cache[reg].flags |= CACHE_INIT;
+ }
+ return rc;
+}
+//#define CACHE_INIT=1;
+//#define CACHE_VOLAT=2;
+
+static void si5338_init_of(struct i2c_client *client)
+{
......@@ -2621,7 +2652,7 @@ Index: git/drivers/misc/si5338.c
+static int si5338_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int rc=0;
+ int i,rc=0;
+ struct si5338_data_t *clientdata = NULL;
+ /* initialize i2c ... */
+//#define REG5338_DEV_CONFIG2 2
......@@ -2639,13 +2670,17 @@ Index: git/drivers/misc/si5338.c
+ dev_info(&client->dev,
+ "Chip %s is found, driver version %s\n", id->name, DRV_VERSION);
+ clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata), GFP_KERNEL);
+ for (i=0;i<=LAST_REG;i++){
+ clientdata->cache[i].flags=0;
+ clientdata->cache[i].data=0;
+ }
+ i2c_set_clientdata(client, clientdata);
+ if (((rc=read_reg(client, REG5338_PAGE)))<0) return rc; // will set clientdata->last_page
+ si5338_sysfs_register(&client->dev);
+ mutex_init(&clientdata->lock);
+
+ clientdata->input_frequency=0;
+ clientdata->pll_frequency=0;
+// clientdata->pll_frequency=0;
+
+ si5338_init_of(client);
+ return 0;
......
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