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Diffstat (limited to 'board/lubbock/memsetup.S')
| -rw-r--r-- | board/lubbock/memsetup.S | 749 |
1 files changed, 749 insertions, 0 deletions
diff --git a/board/lubbock/memsetup.S b/board/lubbock/memsetup.S new file mode 100644 index 0000000..c027834 --- /dev/null +++ b/board/lubbock/memsetup.S @@ -0,0 +1,749 @@ +/* + * Most of this taken from Redboot hal_platform_setup.h with cleanup + * + * NOTE: I haven't clean this up considerably, just enough to get it + * running. See hal_platform_setup.h for the source. See + * board/cradle/memsetup.S for another PXA250 setup that is + * much cleaner. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <config.h> +#include <version.h> +#include <asm/arch/pxa-regs.h> + +DRAM_SIZE: .long CFG_DRAM_SIZE + +/* wait for coprocessor write complete */ + .macro CPWAIT reg + mrc p15,0,\reg,c2,c0,0 + mov \reg,\reg + sub pc,pc,#4 + .endm + + +.globl memsetup +memsetup: + + mov r10, lr + + /* Set up GPIO pins first */ + + ldr r0, =GPSR0 + ldr r1, =CFG_GPSR0_VAL + str r1, [r0] + + ldr r0, =GPSR1 + ldr r1, =CFG_GPSR1_VAL + str r1, [r0] + + ldr r0, =GPSR2 + ldr r1, =CFG_GPSR2_VAL + str r1, [r0] + + ldr r0, =GPCR0 + ldr r1, =CFG_GPCR0_VAL + str r1, [r0] + + ldr r0, =GPCR1 + ldr r1, =CFG_GPCR1_VAL + str r1, [r0] + + ldr r0, =GPCR2 + ldr r1, =CFG_GPCR2_VAL + str r1, [r0] + + ldr r0, =GPDR0 + ldr r1, =CFG_GPDR0_VAL + str r1, [r0] + + ldr r0, =GPDR1 + ldr r1, =CFG_GPDR1_VAL + str r1, [r0] + + ldr r0, =GPDR2 + ldr r1, =CFG_GPDR2_VAL + str r1, [r0] + + ldr r0, =GAFR0_L + ldr r1, =CFG_GAFR0_L_VAL + str r1, [r0] + + ldr r0, =GAFR0_U + ldr r1, =CFG_GAFR0_U_VAL + str r1, [r0] + + ldr r0, =GAFR1_L + ldr r1, =CFG_GAFR1_L_VAL + str r1, [r0] + + ldr r0, =GAFR1_U + ldr r1, =CFG_GAFR1_U_VAL + str r1, [r0] + + ldr r0, =GAFR2_L + ldr r1, =CFG_GAFR2_L_VAL + str r1, [r0] + + ldr r0, =GAFR2_U + ldr r1, =CFG_GAFR2_U_VAL + str r1, [r0] + + /* enable GPIO pins */ + ldr r0, =PSSR + ldr r1, =CFG_PSSR_VAL + str r1, [r0] + + ldr r3, =MSC1 /* low - bank 2 Lubbock Registers / SRAM */ + ldr r2, =CFG_MSC1_VAL /* high - bank 3 Ethernet Controller */ + str r2, [r3] /* need to set MSC1 before trying to write to the HEX LEDs */ + ldr r2, [r3] /* need to read it back to make sure the value latches (see MSC section of manual) */ + + ldr r1, =LED_BLANK + mov r0, #0xFF + str r0, [r1] /* turn on hex leds */ + +loop: + ldr r0, =0xB0070001 + ldr r1, =_LED + str r0, [r1] /* hex display */ + +/********************************************************************* + Initlialize Memory Controller + The sequence below is based on the recommended init steps detailed + in the EAS, chapter 5 (Chapter 10, Operating Systems Developers Guide) + + + pause for 200 uSecs- allow internal clocks to settle + *Note: only need this if hard reset... doing it anyway for now +*/ + + @ ---- Wait 200 usec + ldr r3, =OSCR @ reset the OS Timer Count to zero + mov r2, #0 + str r2, [r3] + ldr r4, =0x300 @ really 0x2E1 is about 200usec, so 0x300 should be plenty +1: + ldr r2, [r3] + cmp r4, r2 + bgt 1b + +mem_init: + @ get memory controller base address + ldr r1, =MEMC_BASE + +@**************************************************************************** +@ Step 1 +@ + + @ write msc0, read back to ensure data latches + @ + ldr r2, =CFG_MSC0_VAL + str r2, [r1, #MSC0_OFFSET] + ldr r2, [r1, #MSC0_OFFSET] + + @ write msc1 + ldr r2, =CFG_MSC1_VAL + str r2, [r1, #MSC1_OFFSET] + ldr r2, [r1, #MSC1_OFFSET] + + @ write msc2 + ldr r2, =CFG_MSC2_VAL + str r2, [r1, #MSC2_OFFSET] + ldr r2, [r1, #MSC2_OFFSET] + + @ write mecr + ldr r2, =CFG_MECR_VAL + str r2, [r1, #MECR_OFFSET] + + @ write mcmem0 + ldr r2, =CFG_MCMEM0_VAL + str r2, [r1, #MCMEM0_OFFSET] + + @ write mcmem1 + ldr r2, =CFG_MCMEM1_VAL + str r2, [r1, #MCMEM1_OFFSET] + + @ write mcatt0 + ldr r2, =CFG_MCATT0_VAL + str r2, [r1, #MCATT0_OFFSET] + + @ write mcatt1 + ldr r2, =CFG_MCATT1_VAL + str r2, [r1, #MCATT1_OFFSET] + + @ write mcio0 + ldr r2, =CFG_MCIO0_VAL + str r2, [r1, #MCIO0_OFFSET] + + @ write mcio1 + ldr r2, =CFG_MCIO1_VAL + str r2, [r1, #MCIO1_OFFSET] + + @------------------------------------------------------- + @ 3rd bullet, Step 1 + @ + + @ get the mdrefr settings + ldr r3, =CFG_MDREFR_VAL_100 + + @ extract DRI field (we need a valid DRI field) + @ + ldr r2, =0xFFF + + @ valid DRI field in r3 + @ + and r3, r3, r2 + + @ get the reset state of MDREFR + @ + ldr r4, [r1, #MDREFR_OFFSET] + + @ clear the DRI field + @ + bic r4, r4, r2 + + @ insert the valid DRI field loaded above + @ + orr r4, r4, r3 + + @ write back mdrefr + @ + str r4, [r1, #MDREFR_OFFSET] + + @ *Note: preserve the mdrefr value in r4 * + +@**************************************************************************** +@ Step 2 +@ + /* This should be for SRAM, why is it commented out??? */ + + @ fetch sxcnfg value + @ + @ldr r2, =0 + @ write back sxcnfg + @str r2, [r1, #SXCNFG_OFFSET] + +/* @if sxcnfg=0, don't program for synch-static memory */ + @cmp r2, #0 + @beq 1f + + @program sxmrs + @ldr r2, =SXMRS_SETTINGS + @str r2, [r1, #SXMRS_OFFSET] + + +@**************************************************************************** +@ Step 3 +@ + + @ Assumes previous mdrefr value in r4, if not then read current mdrefr + + @ clear the free-running clock bits + @ (clear K0Free, K1Free, K2Free + @ + bic r4, r4, #(0x00800000 | 0x01000000 | 0x02000000) + + @ set K1RUN if bank 0 installed + @ + orr r4, r4, #0x00010000 + + + +#ifdef THIS +@<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!< +@<!<!<!<!<!<!<!<!<!<!<! Begin INSERT 1 <!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!< + @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + @ Lubbock: Allow the user to select the {T/R/M} with predetermined + @ SDCLK. Based on Table 3-1 in PXA250 and PXA210 Dev Man. + @ + @ * = Must set MDREFR.K1DB2 to halve the MemClk for desired SDCLK[1] + @ + @ S25, S26 used to provide all 400 MHz BIN values for Cotulla (0,0 - 1,3) + @ S25, S26 used to provide all 200 MHz BIN values for Sabinal + @ + @ S23: Force the halving of MemClk when deriving SDCLK[1] + @ DOT: no override !DOT: halve (if not already forced half) +/* @ *For certain MemClks, SDCLK's derivation is forced to be halved */ + @ + @ S24: Run/Turbo. + @ DOT: Run mode !DOT: Turbo mode + @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ + + @ + @ Allow the user to control K1DB2 where applicable + @ + @ Get the value of S23: @ 1 = DOT (unity), 0 = !DOT (halve it) + @ + @ DOT: set K1DB2 (SDCLD = MemClk) + @ !DOT: clear K1DB2 (SDCLK = MemClk/2) + @ + @ldr r2, =FPGA_REGS_BASE_PHYSICAL + + bl GET_S23 @ r3, r2 @ get the value of S23 in R0, i put the base adx of fpga in r3 + + cmp r3, #0x0 @ is !DOT? + orreq r4, r4, #0x00020000 @ SDClk[1] = MemClk/2 + bicne r4, r4, #0x00020000 @ SDClk[1] = MemClk + + @ + @ Next, we need to look for S25,S26 selections that necessitate the + @ halving of MemClk to derive SDCLK[1]: (S25,S26)={03-0C, 10-13} + @ Override above S23-based selection accordingly. + @ + ldr r2, =FPGA_REGS_BASE_PHYSICAL + bl GET_S25 @ r0, r2 + @ get the value of S25 in R0, i put the base adx of fpga in r2 + + + + ldr r2, =FPGA_REGS_BASE_PHYSICAL + BL GET_S26 @ r3, r2 + @ get the value of S26 in R1, i put the base adx of fpga in r2 + + orr r0, r0, r3 @ concatenate S25 & S26 vals + and r0, r0, #0xFF + + @ Set K1DB2 for the frequencies that require it + @ + cmp r0, #0x03 + cmpne r0, #0x04 + cmpne r0, #0x05 + cmpne r0, #0x06 + cmpne r0, #0x07 + cmpne r0, #0x08 + cmpne r0, #0x09 + cmpne r0, #0x0A + cmpne r0, #0x0B + cmpne r0, #0x0C + cmpne r0, #0x10 + cmpne r0, #0x11 + cmpne r0, #0x12 + cmpne r0, #0x13 + orreq r4, r4, #0x00020000 @ SDCLK[1] = (MemClk)/2 for 03 - 0C @ 10 - 13 + + @ + @ *Must make MSC0&1 adjustments now for MEMClks > 100MHz. + @ + @ Adjust MSC0 for MemClks > 100 MHz + @ + ldreq r0, [r1, #MSC0_OFFSET] + ldreq r3, =0x7F007F00 + biceq r0, r0, r3 @ clear MSC0[14:12, 11:8] (RRR, RDN) + ldreq r3, =0x46004600 + orreq r0, r0, r3 @ set MSC0[14, 10:9] (doubling RRR, RDN) + streq r0, [r1, #MSC0_OFFSET] + ldreq r0, [r1, #MSC0_OFFSET] @ read it back to ensure that the data latches + + @ + @ Adjust MSC1.LH for MemClks > 100 MHz + @ + ldreq r0, [r1, #MSC1_OFFSET] + ldreq r3, =0x7FF0 + biceq r0, r0, r3 @ clear MSC1[14:12, 11:8, 7:4] (RRR, RDN, RDF) + ldreq r3, =0x4880 + orreq r0, r0, r3 @ set MSC1[14, 11, 7] (doubling RRR, RDN, RDF) + streq r0, [r1, #MSC1_OFFSET] + ldreq r0, [r1, #MSC1_OFFSET] @ read it back to ensure that the data latches + + @ @ + @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ +#endif + +@<!<!<!<!<!<!<!<!<!<!<! End INSERT 1 <!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!< +@<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!<!< + + + @ write back mdrefr + @ + str r4, [r1, #MDREFR_OFFSET] + ldr r4, [r1, #MDREFR_OFFSET] + + @ deassert SLFRSH + @ + bic r4, r4, #0x00400000 + + @ write back mdrefr + @ + str r4, [r1, #MDREFR_OFFSET] + + @ assert E1PIN + @ + orr r4, r4, #0x00008000 + + @ write back mdrefr + @ + str r4, [r1, #MDREFR_OFFSET] + ldr r4, [r1, #MDREFR_OFFSET] + nop + nop + + +@**************************************************************************** +@ Step 4 +@ + + @ fetch platform value of mdcnfg + @ + ldr r2, =CFG_MDCNFG_VAL + + @ disable all sdram banks + @ + bic r2, r2, #(MDCNFG_DE0 | MDCNFG_DE1) + bic r2, r2, #(MDCNFG_DE2 | MDCNFG_DE3) + + @ program banks 0/1 for bus width + @ + bic r2, r2, #MDCNFG_DWID0 @0=32-bit + + + @ write initial value of mdcnfg, w/o enabling sdram banks + @ + str r2, [r1, #MDCNFG_OFFSET] + +@ **************************************************************************** +@ Step 5 +@ + + @ pause for 200 uSecs + @ + ldr r3, =OSCR @reset the OS Timer Count to zero + mov r2, #0 + str r2, [r3] + ldr r4, =0x300 @really 0x2E1 is about 200usec, so 0x300 should be plenty +1: + ldr r2, [r3] + cmp r4, r2 + bgt 1b + + +@**************************************************************************** +@ Step 6 +@ + + mov r0, #0x78 @turn everything off + mcr p15, 0, r0, c1, c0, 0 @(caches off, MMU off, etc.) + + +@ **************************************************************************** +@ Step 7 +@ + @ Access memory *not yet enabled* for CBR refresh cycles (8) + @ - CBR is generated for all banks + + ldr r2, =CFG_DRAM_BASE + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + + +@ **************************************************************************** +@ Step 8: NOP (enable dcache if you wanna... we dont) +@ + + +@ **************************************************************************** +@ Step 9 +@ + + + @get memory controller base address + @ + ldr r1, =MEMC_BASE + + @fetch current mdcnfg value + @ + ldr r3, [r1, #MDCNFG_OFFSET] + + @enable sdram bank 0 if installed (must do for any populated bank) + @ + orr r3, r3, #MDCNFG_DE0 + + @write back mdcnfg, enabling the sdram bank(s) + @ + str r3, [r1, #MDCNFG_OFFSET] + + +@**************************************************************************** +@ Step 10 +@ + + @ write mdmrs + @ + ldr r2, =CFG_MDMRS_VAL + str r2, [r1, #MDMRS_OFFSET] + + +@**************************************************************************** +@ Step 11: Final Step +@ + +@INITINTC + @******************************************************************** + @ Disable (mask) all interrupts at the interrupt controller + @ + + @ clear the interrupt level register (use IRQ, not FIQ) + @ + mov r1, #0 + ldr r2, =ICLR + str r1, [r2] + + @ mask all interrupts at the controller + @ + ldr r2, =ICMR + str r1, [r2] + + +@INITCLKS + @ ******************************************************************** + @ Disable the peripheral clocks, and set the core clock + @ frequency (hard-coding at 398.12MHz for now). + @ + + @ Turn Off ALL on-chip peripheral clocks for re-configuration + @ *Note: See label 'ENABLECLKS' for the re-enabling + @ + ldr r1, =CKEN + mov r2, #0 + str r2, [r1] + + + @ default value in case no valid rotary switch setting is found + ldr r2, =(CCCR_L27 | CCCR_M2 | CCCR_N10) @ DEFAULT: {200/200/100} + + + @... and write the core clock config register + @ + ldr r1, =CCCR + str r2, [r1] + +/* @ enable the 32Khz oscillator for RTC and PowerManager + @ + ldr r1, =OSCC + mov r2, #OSCC_OON + str r2, [r1] + + + @ NOTE: spin here until OSCC.OOK get set, + @ meaning the PLL has settled. + @ +60: + ldr r2, [r1] + ands r2, r2, #1 + beq 60b +*/ + +@OSCC_OON_DONE + + +#ifdef A0_COTULLA + @**************************************************************************** + @ !!! Take care of A0 Errata Sighting #4 -- + @ after a frequency change, the memory controller must be restarted + @ + + @ get memory controller base address + ldr r1, =MEMC_BASE + + @ get the current state of MDREFR + @ + ldr r2, [r1, #MDREFR_OFFSET] + + @ clear E0PIN, E1PIN + @ + bic r3, r2, #(MDREFR_E0PIN | MDREFR_E1PIN) + + @ write MDREFR with E0PIN, E1PIN cleared (disable sdclk[0,1]) + @ + str r3, [r1, #MDREFR_OFFSET] + + @ then write MDREFR with E0PIN, E1PIN set (enable sdclk[0,1]) + @ + str r2, [r1, #MDREFR_OFFSET] + + @ get the current state of MDCNFG + @ + ldr r3, [r1, #MDCNFG_OFFSET] + + @ disable all SDRAM banks + @ + bic r3, r3, #(MDCNFG_DE0 | MDCNFG_DE1) + bic r3, r3, #(MDCNFG_DE2 | MDCNFG_DE3) + + @ write back MDCNFG + @ + ldr r3, [r1, #MDCNFG_OFFSET] + + @ Access memory not yet enabled for CBR refresh cycles (8) + @ - CBR is generated for *all* banks + ldr r2, =CFG_DRAM_BASE + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + str r2, [r2] + + @ fetch current mdcnfg value + @ + ldr r3, [r1, #MDCNFG_OFFSET] + + @ enable sdram bank 0 if installed + @ + orr r3, r3, #MDCNFG_DE0 + + @ write back mdcnfg, enabling the sdram bank(s) + @ + str r3, [r1, #MDCNFG_OFFSET] + + @ write mdmrs + @ + ldr r2, =CFG_MDMRS_VAL + str r2, [r1, #MDMRS_OFFSET] + + + + /* @ errata: don't enable auto power-down */ + @ get current value of mdrefr + @ldr r3, [r1, #MDREFR_OFFSET] + @ enable auto-power down + @orr r3, r3, #MDREFR_APD + @write back mdrefr + @str r3, [r1, #MDREFR_OFFSET] + +#endif A0_Cotulla + + + ldr r0, =0x000C0dE3 + ldr r1, =_LED + str r0, [r1] /* hex display */ + +@ ^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^% +@ ^%^%^%^%^%^%^%^%^% above could be replaced by prememLLI ^%^%^%^%^%^%^%^%^% +@ ^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^%^% + + + /* Save SDRAM size */ + ldr r1, =DRAM_SIZE + str r8, [r1] + + ldr r0, =0xC0DE0006 + ldr r1, =_LED + str r0, [r1] /* hex display */ + + /* Interrupt init */ + /* Mask all interrupts */ + ldr r0, =ICMR /* enable no sources */ + mov r1, #0 + str r1, [r0] + +#define NODEBUG +#ifdef NODEBUG + /*Disable software and data breakpoints */ + mov r0,#0 + mcr p15,0,r0,c14,c8,0 /* ibcr0 */ + mcr p15,0,r0,c14,c9,0 /* ibcr1 */ + mcr p15,0,r0,c14,c4,0 /* dbcon */ + + /*Enable all debug functionality */ + mov r0,#0x80000000 + mcr p14,0,r0,c10,c0,0 /* dcsr */ + +#endif + + ldr r0, =0xBEEF001D + ldr r1, =_LED + str r0, [r1] /* hex display */ + + mov pc, r10 + +@ End memsetup + +@ %%%%%%%%%%% Useful subroutines +GET_S23: + @ This macro will read S23 and return its value in r3 + @ r2 contains the base address of the Lubbock user registers + ldr r2, =FPGA_REGS_BASE_PHYSICAL + + /*@ read S23's value */ + ldr r3, [r2, #USER_SWITCHES_OFFSET] + + @ mask out irrelevant bits + and r3, r3, #0x200 + + @ get bit into position 0 + mov r3, r3, LSR #9 + + mov pc, lr +@ End GET_S23 + + +GET_S24: + @ This macro will read S24 and return its value in r0 + @ r2 contains the base address of the Lubbock user registers + ldr r2, =FPGA_REGS_BASE_PHYSICAL + + /*@ read S24's value */ + ldr r0, [r2, #USER_SWITCHES_OFFSET] + + @ mask out irrelevant bits + and r0, r0, #0x100 + + @ get bit into position 0 + mov r0, r0, LSR #8 + + mov pc, lr +@ End GET_S23 + + +GET_S25: + @ This macro will read rotary S25 and return its value in r0 + @ r2 contains the base address of the Lubbock user registers + @ read the user switches register + ldr r0, [r2, #USER_SWITCHES_OFFSET] + + @ mask out irrelevant bits + and r0, r0, #0xF0 + + mov pc, lr +@ End subroutine + + +GET_S26: + @ This macro will read rotary S26 and return its value in r3 + @ r2 contains the base address of the Lubbock user registers + @ read the user switches register + ldr r3, [r2, #USER_SWITCHES_OFFSET] + + @ mask out irrelevant bits + and r3, r3, #0x0F + + mov pc, lr +@ End subroutine GET_S26 + + |