DM36x: pll & clock setup

Added a function 'pll_v03_setup' to set up PLLs and clock
dividers on DM365 and DM368.

Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com>
Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

tcl/target/davinci.cfg

@@ -143,6 +143,133 @@ proc pll_v02_setup {pll_addr mult config} {
 	mww $pll_ctrl_addr $pll_ctrl
 }
 
+# PLL version 0x03: tested on dm365
+proc pll_v03_setup {pll_addr mult config} {
+	set pll_ctrl_addr [expr $pll_addr + 0x100]
+	set pll_secctrl_addr [expr $pll_addr + 0x108]
+	set pll_ctrl [mrw $pll_ctrl_addr]
+
+	# 1 - power up the PLL
+	set pll_ctrl [expr $pll_ctrl & ~0x0002]
+	mww $pll_ctrl_addr $pll_ctrl
+
+	# 2 - clear PLLENSRC (bit 5)
+	set pll_ctrl [expr $pll_ctrl & ~0x0020]
+	mww $pll_ctrl_addr $pll_ctrl
+
+	# 2 - clear PLLEN (bit 0) ... enter bypass mode
+	set pll_ctrl [expr $pll_ctrl & ~0x0001]
+	mww $pll_ctrl_addr $pll_ctrl
+
+	# 3 - wait at least 4 refclk cycles
+	sleep 1
+
+	# 4 - set PLLRST (bit 3)
+	set pll_ctrl [expr $pll_ctrl | 0x0008]
+	mww $pll_ctrl_addr $pll_ctrl
+
+	# 5 - wait at least 5 usec
+	sleep 1
+
+	# 6 - clear PLLRST (bit 3)
+	set pll_ctrl [expr $pll_ctrl & ~0x0008]
+	mww $pll_ctrl_addr $pll_ctrl
+
+	# 9 - optional:  write prediv, postdiv, and pllm
+	mww [expr $pll_addr + 0x0110] [expr ($mult / 2) & 0x1ff]
+	if { [dict exists $config prediv] } {
+		set div [dict get $config prediv]
+		set div [expr ($div - 1)]
+		mww [expr $pll_addr + 0x0114] $div
+	}
+	if { [dict exists $config postdiv] } {
+		set div [dict get $config postdiv]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0128] $div
+	}
+
+	# 10 - write start sequence to PLLSECCTL
+	mww $pll_secctrl_addr 0x00470000
+	mww $pll_secctrl_addr 0x00460000
+	mww $pll_secctrl_addr 0x00400000
+	mww $pll_secctrl_addr 0x00410000
+
+	# 11 - optional:  set plldiv1, plldiv2, ...
+	# NOTE:  this assumes some registers have their just-reset values:
+	#	- PLLSTAT.GOSTAT is clear when we enter
+	#	- ALNCTL has everything set
+	set aln 0
+	if { [dict exists $config div1] } {
+		set div [dict get $config div1]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0118] $div
+		set aln [expr $aln | 0x1]
+	}
+	if { [dict exists $config div2] } {
+		set div [dict get $config div2]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x011c] $div
+		set aln [expr $aln | 0x2]
+	}
+	if { [dict exists $config div3] } {
+		set div [dict get $config div3]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0120] $div
+		set aln [expr $aln | 0x4]
+	}
+	if { [dict exists $config div4] } {
+		set div [dict get $config div4]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0160] $div
+		set aln [expr $aln | 0x8]
+	}
+	if { [dict exists $config div5] } {
+		set div [dict get $config div5]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0164] $div
+		set aln [expr $aln | 0x10]
+	}
+	if { [dict exists $config div6] } {
+		set div [dict get $config div6]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0168] $div
+		set aln [expr $aln | 0x20]
+	}
+	if { [dict exists $config div7] } {
+		set div [dict get $config div7]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x016c] $div
+		set aln [expr $aln | 0x40]
+	}
+	if { [dict exists $config div8] } {
+		set div [dict get $config div8]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0170] $div
+		set aln [expr $aln | 0x80]
+	}
+	if { [dict exists $config div9] } {
+		set div [dict get $config div9]
+		set div [expr 0x8000 | ($div - 1)]
+		mww [expr $pll_addr + 0x0174] $div
+		set aln [expr $aln | 0x100]
+	}
+	if {$aln != 0} {
+		# write alingment flags
+		mww [expr $pll_addr + 0x0140] $aln
+		# write pllcmd.GO; poll pllstat.GO
+		mww [expr $pll_addr + 0x0138] 0x01
+		set pllstat [expr $pll_addr + 0x013c]
+		while {[expr [mrw $pllstat] & 0x01] != 0} { sleep 1 }
+	}
+	mww [expr $pll_addr + 0x0138] 0x00
+	set addr [dict get $config ctladdr]
+	while {[expr [mrw $addr] & 0x0e000000] != 0x0e000000} { sleep 1 }
+
+	# 12 - set PLLEN (bit 0) ... leave bypass mode
+	set pll_ctrl [expr $pll_ctrl | 0x0001]
+	mww $pll_ctrl_addr $pll_ctrl
+}
+
 # NOTE:  dm6446 requires EMURSTIE set in MDCTL before certain
 # modules can be enabled.