blackfin: bf60x: make clock changeable in kernel menuconfig

Add clock changeable support in kernel menuconfig for bf60x.

Signed-off-by: Bob Liu <lliubbo@gmail.com>

arch/blackfin/Kconfig

@@ -435,7 +435,7 @@ config BFIN_KERNEL_CLOCK
 
 config PLL_BYPASS
 	bool "Bypass PLL"
-	depends on BFIN_KERNEL_CLOCK
+	depends on BFIN_KERNEL_CLOCK && (!BF60x)
 	default n
 
 config CLKIN_HALF
@@ -454,7 +454,7 @@ config VCO_MULT
 	default "20" if (BFIN537_STAMP || BFIN527_EZKIT || BFIN527_EZKIT_V2 || BFIN548_EZKIT || BFIN548_BLUETECHNIX_CM || BFIN538_EZKIT)
 	default "22" if BFIN533_BLUETECHNIX_CM
 	default "20" if (BFIN537_BLUETECHNIX_CM_E || BFIN537_BLUETECHNIX_CM_U || BFIN527_BLUETECHNIX_CM || BFIN561_BLUETECHNIX_CM)
-	default "20" if BFIN561_EZKIT
+	default "20" if (BFIN561_EZKIT || BF609)
 	default "16" if (H8606_HVSISTEMAS || BLACKSTAMP || BFIN526_EZBRD || BFIN518F_EZBRD)
 	default "25" if BFIN527_AD7160EVAL
 	help
@@ -486,12 +486,45 @@ config SCLK_DIV
 	int "System Clock Divider"
 	depends on BFIN_KERNEL_CLOCK
 	range 1 15
-	default 5
+	default 4
 	help
-	  This sets the frequency of the system clock (including SDRAM or DDR).
+	  This sets the frequency of the system clock (including SDRAM or DDR) on
+	  !BF60x else it set the clock for system buses and provides the
+	  source from which SCLK0 and SCLK1 are derived.
 	  This can be between 1 and 15
 	  System Clock = (PLL frequency) / (this setting)
 
+config SCLK0_DIV
+	int "System Clock0 Divider"
+	depends on BFIN_KERNEL_CLOCK && BF60x
+	range 1 15
+	default 1
+	help
+	  This sets the frequency of the system clock0 for PVP and all other
+	  peripherals not clocked by SCLK1.
+	  This can be between 1 and 15
+	  System Clock0 = (System Clock) / (this setting)
+
+config SCLK1_DIV
+	int "System Clock1 Divider"
+	depends on BFIN_KERNEL_CLOCK && BF60x
+	range 1 15
+	default 1
+	help
+	  This sets the frequency of the system clock1 (including SPORT, SPI and ACM).
+	  This can be between 1 and 15
+	  System Clock1 = (System Clock) / (this setting)
+
+config DCLK_DIV
+	int "DDR Clock Divider"
+	depends on BFIN_KERNEL_CLOCK && BF60x
+	range 1 15
+	default 2
+	help
+	  This sets the frequency of the DDR memory.
+	  This can be between 1 and 15
+	  DDR Clock = (PLL frequency) / (this setting)
+
 choice
 	prompt "DDR SDRAM Chip Type"
 	depends on BFIN_KERNEL_CLOCK
@@ -507,7 +540,7 @@ endchoice
 
 choice
 	prompt "DDR/SDRAM Timing"
-	depends on BFIN_KERNEL_CLOCK
+	depends on BFIN_KERNEL_CLOCK && !BF60x
 	default BFIN_KERNEL_CLOCK_MEMINIT_CALC
 	help
 	  This option allows you to specify Blackfin SDRAM/DDR Timing parameters
@@ -589,6 +622,7 @@ config MAX_VCO_HZ
 	default 600000000 if BF548
 	default 533333333 if BF549
 	default 600000000 if BF561
+	default 800000000 if BF609
 
 config MIN_VCO_HZ
 	int
@@ -596,6 +630,7 @@ config MIN_VCO_HZ
 
 config MAX_SCLK_HZ
 	int
+	default 200000000 if BF609
 	default 133333333
 
 config MIN_SCLK_HZ

arch/blackfin/include/asm/bfin-global.h

@@ -38,7 +38,7 @@ extern unsigned long get_sclk(void);
 #ifdef CONFIG_BF60x
 extern unsigned long get_sclk0(void);
 extern unsigned long get_sclk1(void);
-extern unsigned long get_dramclk(void);
+extern unsigned long get_dclk(void);
 #endif
 extern unsigned long sclk_to_usecs(unsigned long sclk);
 extern unsigned long usecs_to_sclk(unsigned long usecs);

arch/blackfin/kernel/setup.c

@@ -892,9 +892,6 @@ void __init setup_arch(char **cmdline_p)
 {
 	u32 mmr;
 	unsigned long sclk, cclk;
-#ifdef CONFIG_BF60x
-	struct clk *clk;
-#endif
 
 	native_machine_early_platform_add_devices();
 
@@ -959,24 +956,8 @@ void __init setup_arch(char **cmdline_p)
 					~HYST_NONEGPIO_MASK) | HYST_NONEGPIO);
 #endif
 
-#ifdef CONFIG_BF60x
-	clk = clk_get(NULL, "CCLK");
-	if (!IS_ERR(clk)) {
-		cclk = clk_get_rate(clk);
-		clk_put(clk);
-	} else
-		cclk = 0;
-
-	clk = clk_get(NULL, "SCLK0");
-	if (!IS_ERR(clk)) {
-		sclk = clk_get_rate(clk);
-		clk_put(clk);
-	} else
-		sclk = 0;
-#else
 	cclk = get_cclk();
 	sclk = get_sclk();
-#endif
 
 	if ((ANOMALY_05000273 || ANOMALY_05000274) && (cclk >> 1) < sclk)
 		panic("ANOMALY 05000273 or 05000274: CCLK must be >= 2*SCLK");
@@ -1062,8 +1043,13 @@ void __init setup_arch(char **cmdline_p)
 
 	printk(KERN_INFO "Blackfin Linux support by http://blackfin.uclinux.org/\n");
 
+#ifdef CONFIG_BF60x
+	printk(KERN_INFO "Processor Speed: %lu MHz core clock, %lu MHz SCLk, %lu MHz SCLK0, %lu MHz SCLK1 and %lu MHz DCLK\n",
+		cclk / 1000000, sclk / 1000000, get_sclk0() / 1000000, get_sclk1() / 1000000, get_dclk() / 1000000);
+#else
 	printk(KERN_INFO "Processor Speed: %lu MHz core clock and %lu MHz System Clock\n",
 	       cclk / 1000000, sclk / 1000000);
+#endif
 
 	setup_bootmem_allocator();
 

arch/blackfin/mach-bf609/clock.c

@@ -351,7 +351,7 @@ static struct clk dclk = {
 	.rate       = 500000000,
 	.mask       = CGU0_DIV_DSEL_MASK,
 	.shift       = CGU0_DIV_DSEL_SHIFT,
-	.parent     = &pll_clk,
+	.parent     = &sys_clkin,
 	.ops	    = &sys_clk_ops,
 };
 

arch/blackfin/mach-common/clocks-init.c

@@ -15,10 +15,121 @@
 #include <asm/mem_init.h>
 #include <asm/dpmc.h>
 
+#ifdef CONFIG_BF60x
+#define CSEL_P			0
+#define S0SEL_P			5
+#define SYSSEL_P		8
+#define S1SEL_P			13
+#define DSEL_P			16
+#define OSEL_P			22
+#define ALGN_P			29
+#define UPDT_P			30
+#define LOCK_P			31
+
+#define CGU_CTL_VAL ((CONFIG_VCO_MULT << 8) | CLKIN_HALF)
+#define CGU_DIV_VAL \
+	((CONFIG_CCLK_DIV   << CSEL_P)   | \
+	(CONFIG_SCLK_DIV << SYSSEL_P)   | \
+	(CONFIG_SCLK0_DIV  << S0SEL_P)  | \
+	(CONFIG_SCLK1_DIV  << S1SEL_P)  | \
+	(CONFIG_DCLK_DIV   << DSEL_P))
+
+#define CONFIG_BFIN_DCLK (((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_DCLK_DIV) / 1000000)
+#if ((CONFIG_BFIN_DCLK != 125) && \
+	(CONFIG_BFIN_DCLK != 133) && (CONFIG_BFIN_DCLK != 150) && \
+	(CONFIG_BFIN_DCLK != 166) && (CONFIG_BFIN_DCLK != 200) && \
+	(CONFIG_BFIN_DCLK != 225) && (CONFIG_BFIN_DCLK != 250))
+#error "DCLK must be in (125, 133, 150, 166, 200, 225, 250)MHz"
+#endif
+struct ddr_config {
+	u32 ddr_clk;
+	u32 dmc_ddrctl;
+	u32 dmc_ddrcfg;
+	u32 dmc_ddrtr0;
+	u32 dmc_ddrtr1;
+	u32 dmc_ddrtr2;
+	u32 dmc_ddrmr;
+	u32 dmc_ddrmr1;
+};
+
+struct ddr_config ddr_config_table[] __attribute__((section(".data_l1"))) = {
+	[0] = {
+		.ddr_clk    = 125,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20705212,
+		.dmc_ddrtr1 = 0x201003CF,
+		.dmc_ddrtr2 = 0x00320107,
+		.dmc_ddrmr  = 0x00000422,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[1] = {
+		.ddr_clk    = 133,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20806313,
+		.dmc_ddrtr1 = 0x2013040D,
+		.dmc_ddrtr2 = 0x00320108,
+		.dmc_ddrmr  = 0x00000632,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[2] = {
+		.ddr_clk    = 150,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20A07323,
+		.dmc_ddrtr1 = 0x20160492,
+		.dmc_ddrtr2 = 0x00320209,
+		.dmc_ddrmr  = 0x00000632,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[3] = {
+		.ddr_clk    = 166,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20A07323,
+		.dmc_ddrtr1 = 0x2016050E,
+		.dmc_ddrtr2 = 0x00320209,
+		.dmc_ddrmr  = 0x00000632,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[4] = {
+		.ddr_clk    = 200,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20a07323,
+		.dmc_ddrtr1 = 0x2016050f,
+		.dmc_ddrtr2 = 0x00320509,
+		.dmc_ddrmr  = 0x00000632,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[5] = {
+		.ddr_clk    = 225,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20E0A424,
+		.dmc_ddrtr1 = 0x302006DB,
+		.dmc_ddrtr2 = 0x0032020D,
+		.dmc_ddrmr  = 0x00000842,
+		.dmc_ddrmr1 = 0x4,
+	},
+	[6] = {
+		.ddr_clk    = 250,
+		.dmc_ddrctl = 0x00000904,
+		.dmc_ddrcfg = 0x00000422,
+		.dmc_ddrtr0 = 0x20E0A424,
+		.dmc_ddrtr1 = 0x3020079E,
+		.dmc_ddrtr2 = 0x0032020D,
+		.dmc_ddrmr  = 0x00000842,
+		.dmc_ddrmr1 = 0x4,
+	},
+};
+#else
 #define SDGCTL_WIDTH (1 << 31)	/* SDRAM external data path width */
 #define PLL_CTL_VAL \
 	(((CONFIG_VCO_MULT & 63) << 9) | CLKIN_HALF | \
-	 (PLL_BYPASS << 8) | (ANOMALY_05000305 ? 0 : 0x8000))
+		(PLL_BYPASS << 8) | (ANOMALY_05000305 ? 0 : 0x8000))
+#endif
 
 __attribute__((l1_text))
 static void do_sync(void)
@@ -34,7 +145,43 @@ void init_clocks(void)
 	 * For example, any automatic DMAs left by U-Boot for splash screens.
 	 */
 
-#if 0
+#ifdef CONFIG_BF60x
+	int i, dlldatacycle, dll_ctl;
+	bfin_write32(CGU0_DIV, CGU_DIV_VAL);
+	bfin_write32(CGU0_CTL, CGU_CTL_VAL);
+	while ((bfin_read32(CGU0_STAT) & 0x8) || !(bfin_read32(CGU0_STAT) & 0x4))
+		continue;
+
+	bfin_write32(CGU0_DIV, CGU_DIV_VAL | (1 << UPDT_P));
+	while (bfin_read32(CGU0_STAT) & (1 << 3))
+		continue;
+
+	for (i = 0; i < 7; i++) {
+		if (ddr_config_table[i].ddr_clk == CONFIG_BFIN_DCLK) {
+			bfin_write_DDR0_CFG(ddr_config_table[i].dmc_ddrcfg);
+			bfin_write_DDR0_TR0(ddr_config_table[i].dmc_ddrtr0);
+			bfin_write_DDR0_TR1(ddr_config_table[i].dmc_ddrtr1);
+			bfin_write_DDR0_TR2(ddr_config_table[i].dmc_ddrtr2);
+			bfin_write_DDR0_MR(ddr_config_table[i].dmc_ddrmr);
+			bfin_write_DDR0_EMR1(ddr_config_table[i].dmc_ddrmr1);
+			bfin_write_DDR0_CTL(ddr_config_table[i].dmc_ddrctl);
+			break;
+		}
+	}
+
+	do_sync();
+	while (!(bfin_read_DDR0_STAT() & 0x4))
+		continue;
+
+	dlldatacycle = (bfin_read_DDR0_STAT() & 0x00f00000) >> 20;
+	dll_ctl = bfin_read_DDR0_DLLCTL();
+	dll_ctl &= 0x0ff;
+	bfin_write_DDR0_DLLCTL(dll_ctl | (dlldatacycle << 8));
+
+	do_sync();
+	while (!(bfin_read_DDR0_STAT() & 0x2000))
+		continue;
+#else
 	size_t i;
 	for (i = 0; i < MAX_DMA_CHANNELS; ++i) {
 		struct dma_register *dma = dma_io_base_addr[i];
@@ -92,9 +239,9 @@ void init_clocks(void)
 #ifdef CONFIG_MEM_EBIU_DDRQUE
 	bfin_write_EBIU_DDRQUE(CONFIG_MEM_EBIU_DDRQUE);
 #endif
+#endif
 #endif
 	do_sync();
 	bfin_read16(0);
 
-#endif
 }