2 # Utility code for DaVinci-family chips
5 # davinci_pinmux: assigns PINMUX$reg <== $value
6 proc davinci_pinmux {soc reg value} {
7 mww [expr [dict get $soc sysbase] + 4 * $reg] $value
10 # mrw: "memory read word", returns value of $reg
13 ocd_mem2array value 32 $reg 1
17 # mmw: "memory modify word", updates value of $reg
18 # $reg <== ((value & ~$clearbits) | $setbits)
19 proc mmw {reg setbits clearbits} {
21 set new [expr ($old & ~$clearbits) | $setbits]
26 # pll_setup: initialize PLL
27 # - pll_addr ... physical addr of controller
28 # - mult ... pll multiplier
29 # - config ... dict mapping { prediv, postdiv, div[1-9] } to dividers
31 # For PLLs that don't have a given register (e.g. plldiv8), or where a
32 # given divider is non-programmable, caller provides *NO* config mapping.
35 # PLL version 0x02: tested on dm355
36 # REVISIT: On dm6446/dm357 the PLLRST polarity is different.
37 proc pll_v02_setup {pll_addr mult config} {
38 set pll_ctrl_addr [expr $pll_addr + 0x100]
39 set pll_ctrl [mrw $pll_ctrl_addr]
41 # 1 - clear CLKMODE (bit 8) iff using on-chip oscillator
42 # NOTE: this assumes we should clear that bit
43 set pll_ctrl [expr $pll_ctrl & ~0x0100]
44 mww $pll_ctrl_addr $pll_ctrl
46 # 2 - clear PLLENSRC (bit 5)
47 set pll_ctrl [expr $pll_ctrl & ~0x0020]
48 mww $pll_ctrl_addr $pll_ctrl
50 # 3 - clear PLLEN (bit 0) ... enter bypass mode
51 set pll_ctrl [expr $pll_ctrl & ~0x0001]
52 mww $pll_ctrl_addr $pll_ctrl
54 # 4 - wait at least 4 refclk cycles
57 # 5 - set PLLRST (bit 3)
58 set pll_ctrl [expr $pll_ctrl | 0x0008]
59 mww $pll_ctrl_addr $pll_ctrl
61 # 6 - set PLLDIS (bit 4)
62 set pll_ctrl [expr $pll_ctrl | 0x0010]
63 mww $pll_ctrl_addr $pll_ctrl
65 # 7 - clear PLLPWRDN (bit 1)
66 set pll_ctrl [expr $pll_ctrl & ~0x0002]
67 mww $pll_ctrl_addr $pll_ctrl
69 # 8 - clear PLLDIS (bit 4)
70 set pll_ctrl [expr $pll_ctrl & ~0x0010]
71 mww $pll_ctrl_addr $pll_ctrl
73 # 9 - optional: write prediv, postdiv, and pllm
74 # NOTE: for dm355 PLL1, postdiv is controlled via MISC register
75 mww [expr $pll_addr + 0x0110] [expr ($mult - 1) & 0xff]
76 if { [dict exists $config prediv] } {
77 set div [dict get $config prediv]
78 set div [expr 0x8000 | ($div - 1)]
79 mww [expr $pll_addr + 0x0114] $div
81 if { [dict exists $config postdiv] } {
82 set div [dict get $config postdiv]
83 set div [expr 0x8000 | ($div - 1)]
84 mww [expr $pll_addr + 0x0128] $div
87 # 10 - optional: set plldiv1, plldiv2, ...
88 # NOTE: this assumes some registers have their just-reset values:
89 # - PLLSTAT.GOSTAT is clear when we enter
90 # - ALNCTL has everything set
92 if { [dict exists $config div1] } {
93 set div [dict get $config div1]
94 set div [expr 0x8000 | ($div - 1)]
95 mww [expr $pll_addr + 0x0118] $div
98 if { [dict exists $config div2] } {
99 set div [dict get $config div2]
100 set div [expr 0x8000 | ($div - 1)]
101 mww [expr $pll_addr + 0x011c] $div
104 if { [dict exists $config div3] } {
105 set div [dict get $config div3]
106 set div [expr 0x8000 | ($div - 1)]
107 mww [expr $pll_addr + 0x0120] $div
110 if { [dict exists $config div4] } {
111 set div [dict get $config div4]
112 set div [expr 0x8000 | ($div - 1)]
113 mww [expr $pll_addr + 0x0160] $div
116 if { [dict exists $config div5] } {
117 set div [dict get $config div5]
118 set div [expr 0x8000 | ($div - 1)]
119 mww [expr $pll_addr + 0x0164] $div
123 # write pllcmd.GO; poll pllstat.GO
124 mww [expr $pll_addr + 0x0138] 0x01
125 set pllstat [expr $pll_addr + 0x013c]
126 while {[expr [mrw $pllstat] & 0x01] != 0} { sleep 1 }
128 mww [expr $pll_addr + 0x0138] 0x00
130 # 11 - wait at least 5 usec for reset to finish
131 # (assume covered by overheads including JTAG messaging)
133 # 12 - clear PLLRST (bit 3)
134 set pll_ctrl [expr $pll_ctrl & ~0x0008]
135 mww $pll_ctrl_addr $pll_ctrl
137 # 13 - wait at least 8000 refclk cycles for PLL to lock
138 # if we assume 24 MHz (slowest osc), that's 1/3 msec
141 # 14 - set PLLEN (bit 0) ... leave bypass mode
142 set pll_ctrl [expr $pll_ctrl | 0x0001]
143 mww $pll_ctrl_addr $pll_ctrl
146 # PLL version 0x03: tested on dm365
147 proc pll_v03_setup {pll_addr mult config} {
148 set pll_ctrl_addr [expr $pll_addr + 0x100]
149 set pll_secctrl_addr [expr $pll_addr + 0x108]
150 set pll_ctrl [mrw $pll_ctrl_addr]
152 # 1 - power up the PLL
153 set pll_ctrl [expr $pll_ctrl & ~0x0002]
154 mww $pll_ctrl_addr $pll_ctrl
156 # 2 - clear PLLENSRC (bit 5)
157 set pll_ctrl [expr $pll_ctrl & ~0x0020]
158 mww $pll_ctrl_addr $pll_ctrl
160 # 2 - clear PLLEN (bit 0) ... enter bypass mode
161 set pll_ctrl [expr $pll_ctrl & ~0x0001]
162 mww $pll_ctrl_addr $pll_ctrl
164 # 3 - wait at least 4 refclk cycles
167 # 4 - set PLLRST (bit 3)
168 set pll_ctrl [expr $pll_ctrl | 0x0008]
169 mww $pll_ctrl_addr $pll_ctrl
171 # 5 - wait at least 5 usec
174 # 6 - clear PLLRST (bit 3)
175 set pll_ctrl [expr $pll_ctrl & ~0x0008]
176 mww $pll_ctrl_addr $pll_ctrl
178 # 9 - optional: write prediv, postdiv, and pllm
179 mww [expr $pll_addr + 0x0110] [expr ($mult / 2) & 0x1ff]
180 if { [dict exists $config prediv] } {
181 set div [dict get $config prediv]
182 set div [expr ($div - 1)]
183 mww [expr $pll_addr + 0x0114] $div
185 if { [dict exists $config postdiv] } {
186 set div [dict get $config postdiv]
187 set div [expr 0x8000 | ($div - 1)]
188 mww [expr $pll_addr + 0x0128] $div
191 # 10 - write start sequence to PLLSECCTL
192 mww $pll_secctrl_addr 0x00470000
193 mww $pll_secctrl_addr 0x00460000
194 mww $pll_secctrl_addr 0x00400000
195 mww $pll_secctrl_addr 0x00410000
197 # 11 - optional: set plldiv1, plldiv2, ...
198 # NOTE: this assumes some registers have their just-reset values:
199 # - PLLSTAT.GOSTAT is clear when we enter
200 # - ALNCTL has everything set
202 if { [dict exists $config div1] } {
203 set div [dict get $config div1]
204 set div [expr 0x8000 | ($div - 1)]
205 mww [expr $pll_addr + 0x0118] $div
206 set aln [expr $aln | 0x1]
208 if { [dict exists $config div2] } {
209 set div [dict get $config div2]
210 set div [expr 0x8000 | ($div - 1)]
211 mww [expr $pll_addr + 0x011c] $div
212 set aln [expr $aln | 0x2]
214 if { [dict exists $config div3] } {
215 set div [dict get $config div3]
216 set div [expr 0x8000 | ($div - 1)]
217 mww [expr $pll_addr + 0x0120] $div
218 set aln [expr $aln | 0x4]
220 if { [dict exists $config div4] } {
221 set div [dict get $config div4]
222 set div [expr 0x8000 | ($div - 1)]
223 mww [expr $pll_addr + 0x0160] $div
224 set aln [expr $aln | 0x8]
226 if { [dict exists $config div5] } {
227 set div [dict get $config div5]
228 set div [expr 0x8000 | ($div - 1)]
229 mww [expr $pll_addr + 0x0164] $div
230 set aln [expr $aln | 0x10]
232 if { [dict exists $config div6] } {
233 set div [dict get $config div6]
234 set div [expr 0x8000 | ($div - 1)]
235 mww [expr $pll_addr + 0x0168] $div
236 set aln [expr $aln | 0x20]
238 if { [dict exists $config div7] } {
239 set div [dict get $config div7]
240 set div [expr 0x8000 | ($div - 1)]
241 mww [expr $pll_addr + 0x016c] $div
242 set aln [expr $aln | 0x40]
244 if { [dict exists $config div8] } {
245 set div [dict get $config div8]
246 set div [expr 0x8000 | ($div - 1)]
247 mww [expr $pll_addr + 0x0170] $div
248 set aln [expr $aln | 0x80]
250 if { [dict exists $config div9] } {
251 set div [dict get $config div9]
252 set div [expr 0x8000 | ($div - 1)]
253 mww [expr $pll_addr + 0x0174] $div
254 set aln [expr $aln | 0x100]
257 # write alingment flags
258 mww [expr $pll_addr + 0x0140] $aln
259 # write pllcmd.GO; poll pllstat.GO
260 mww [expr $pll_addr + 0x0138] 0x01
261 set pllstat [expr $pll_addr + 0x013c]
262 while {[expr [mrw $pllstat] & 0x01] != 0} { sleep 1 }
264 mww [expr $pll_addr + 0x0138] 0x00
265 set addr [dict get $config ctladdr]
266 while {[expr [mrw $addr] & 0x0e000000] != 0x0e000000} { sleep 1 }
268 # 12 - set PLLEN (bit 0) ... leave bypass mode
269 set pll_ctrl [expr $pll_ctrl | 0x0001]
270 mww $pll_ctrl_addr $pll_ctrl
273 # NOTE: dm6446 requires EMURSTIE set in MDCTL before certain
274 # modules can be enabled.
276 # prepare a non-DSP module to be enabled; finish with psc_go
277 proc psc_enable {module} {
278 set psc_addr 0x01c41000
280 mmw [expr $psc_addr + 0x0a00 + (4 * $module)] 0x03 0x1f
283 # prepare a non-DSP module to be reset; finish with psc_go
284 proc psc_reset {module} {
285 set psc_addr 0x01c41000
287 mmw [expr $psc_addr + 0x0a00 + (4 * $module)] 0x01 0x1f
290 # execute non-DSP PSC transition(s) set up by psc_enable, psc_reset, etc
292 set psc_addr 0x01c41000
293 set ptstat_addr [expr $psc_addr + 0x0128]
295 # just in case PTSTAT.go isn't clear
296 while { [expr [mrw $ptstat_addr] & 0x01] != 0 } { sleep 1 }
298 # write PTCMD.go ... ignoring any DSP power domain
299 mww [expr $psc_addr + 0x0120] 1
301 # wait for PTSTAT.go to clear (again ignoring DSP power domain)
302 while { [expr [mrw $ptstat_addr] & 0x01] != 0 } { sleep 1 }
306 # A reset using only SRST is a "Warm Reset", resetting everything in the
307 # chip except ARM emulation (and everything _outside_ the chip that hooks
308 # up to SRST). But many boards don't expose SRST via their JTAG connectors
309 # (it's not present on TI-14 headers).
311 # From the chip-only perspective, a "Max Reset" is a "Warm" reset ... except
312 # without any board-wide side effects, since it's triggered using JTAG using
313 # either (a) ARM watchdog timer, or (b) ICEpick.
315 proc davinci_wdog_reset {} {
316 set timer2_phys 0x01c21c00
319 # - JTAG communication with the ARM *must* be working OK; this
320 # may imply using adaptive clocking or disabling WFI-in-idle
321 # - current target must be the DaVinci ARM
322 # - that ARM core must be halted
323 # - timer2 clock is still enabled (PSC 29 on most chips)
326 # Part I -- run regardless of being halted via JTAG
328 # NOTE: for now, we assume there's no DSP that could control the
329 # watchdog; or, equivalently, SUSPSRC.TMR2SRC says the watchdog
330 # suspend signal is controlled via ARM emulation suspend.
333 # EMUMGT_CLKSPEED: write FREE bit to run despite emulation halt
334 mww phys [expr $timer2_phys + 0x28] 0x00004000
337 # Part II -- in case watchdog hasn't been set up
340 # TCR: disable, force internal clock source
341 mww phys [expr $timer2_phys + 0x20] 0
343 # TGCR: reset, force to 64-bit wdog mode, un-reset ("initial" state)
344 mww phys [expr $timer2_phys + 0x24] 0
345 mww phys [expr $timer2_phys + 0x24] 0x110b
347 # clear counter (TIM12, TIM34) and period (PRD12, PRD34) registers
348 # so watchdog triggers ASAP
349 mww phys [expr $timer2_phys + 0x10] 0
350 mww phys [expr $timer2_phys + 0x14] 0
351 mww phys [expr $timer2_phys + 0x18] 0
352 mww phys [expr $timer2_phys + 0x1c] 0
354 # WDTCR: put into pre-active state, then active
355 mww phys [expr $timer2_phys + 0x28] 0xa5c64000
356 mww phys [expr $timer2_phys + 0x28] 0xda7e4000
359 # Part III -- it's ready to rumble
362 # WDTCR: write invalid WDKEY to trigger reset
363 mww phys [expr $timer2_phys + 0x28] 0x00004000