root/arch/powerpc/boot/dcr.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PPC_BOOT_DCR_H_
#define _PPC_BOOT_DCR_H_

#define mfdcr(rn) \
        ({      \
                unsigned long rval; \
                asm volatile("mfdcr %0,%1" : "=r"(rval) : "i"(rn)); \
                rval; \
        })
#define mtdcr(rn, val) \
        asm volatile("mtdcr %0,%1" : : "i"(rn), "r"(val))
#define mfdcrx(rn) \
        ({      \
                unsigned long rval; \
                asm volatile("mfdcrx %0,%1" : "=r"(rval) : "r"(rn)); \
                rval; \
        })
#define mtdcrx(rn, val) \
        ({      \
                asm volatile("mtdcrx %0,%1" : : "r"(rn), "r" (val)); \
        })

/* 440GP/440GX SDRAM controller DCRs */
#define DCRN_SDRAM0_CFGADDR                             0x010
#define DCRN_SDRAM0_CFGDATA                             0x011

#define SDRAM0_READ(offset) ({\
        mtdcr(DCRN_SDRAM0_CFGADDR, offset); \
        mfdcr(DCRN_SDRAM0_CFGDATA); })
#define SDRAM0_WRITE(offset, data) ({\
        mtdcr(DCRN_SDRAM0_CFGADDR, offset); \
        mtdcr(DCRN_SDRAM0_CFGDATA, data); })

#define         SDRAM0_B0CR                             0x40
#define         SDRAM0_B1CR                             0x44
#define         SDRAM0_B2CR                             0x48
#define         SDRAM0_B3CR                             0x4c

static const unsigned long sdram_bxcr[] = { SDRAM0_B0CR, SDRAM0_B1CR,
                                            SDRAM0_B2CR, SDRAM0_B3CR };

#define                 SDRAM_CONFIG_BANK_ENABLE        0x00000001
#define                 SDRAM_CONFIG_SIZE_MASK          0x000e0000
#define                 SDRAM_CONFIG_BANK_SIZE(reg)     \
        (0x00400000 << ((reg & SDRAM_CONFIG_SIZE_MASK) >> 17))

/* 440GP External Bus Controller (EBC) */
#define DCRN_EBC0_CFGADDR                               0x012
#define DCRN_EBC0_CFGDATA                               0x013
#define   EBC_NUM_BANKS                                   8
#define   EBC_B0CR                                        0x00
#define   EBC_B1CR                                        0x01
#define   EBC_B2CR                                        0x02
#define   EBC_B3CR                                        0x03
#define   EBC_B4CR                                        0x04
#define   EBC_B5CR                                        0x05
#define   EBC_B6CR                                        0x06
#define   EBC_B7CR                                        0x07
#define   EBC_BXCR(n)                                     (n)
#define     EBC_BXCR_BAS                                    0xfff00000
#define     EBC_BXCR_BS                                     0x000e0000
#define     EBC_BXCR_BANK_SIZE(reg) \
        (0x100000 << (((reg) & EBC_BXCR_BS) >> 17))
#define     EBC_BXCR_BU                                     0x00018000
#define       EBC_BXCR_BU_OFF                                 0x00000000
#define       EBC_BXCR_BU_RO                                  0x00008000
#define       EBC_BXCR_BU_WO                                  0x00010000
#define       EBC_BXCR_BU_RW                                  0x00018000
#define     EBC_BXCR_BW                                     0x00006000
#define   EBC_B0AP                                        0x10
#define   EBC_B1AP                                        0x11
#define   EBC_B2AP                                        0x12
#define   EBC_B3AP                                        0x13
#define   EBC_B4AP                                        0x14
#define   EBC_B5AP                                        0x15
#define   EBC_B6AP                                        0x16
#define   EBC_B7AP                                        0x17
#define   EBC_BXAP(n)                                     (0x10+(n))
#define   EBC_BEAR                                        0x20
#define   EBC_BESR                                        0x21
#define   EBC_CFG                                         0x23
#define   EBC_CID                                         0x24

/* 440GP Clock, PM, chip control */
#define DCRN_CPC0_SR                                    0x0b0
#define DCRN_CPC0_ER                                    0x0b1
#define DCRN_CPC0_FR                                    0x0b2
#define DCRN_CPC0_SYS0                                  0x0e0
#define   CPC0_SYS0_TUNE                                  0xffc00000
#define   CPC0_SYS0_FBDV_MASK                             0x003c0000
#define   CPC0_SYS0_FWDVA_MASK                            0x00038000
#define   CPC0_SYS0_FWDVB_MASK                            0x00007000
#define   CPC0_SYS0_OPDV_MASK                             0x00000c00
#define   CPC0_SYS0_EPDV_MASK                             0x00000300
/* Helper macros to compute the actual clock divider values from the
 * encodings in the CPC0 register */
#define   CPC0_SYS0_FBDV(reg) \
                ((((((reg) & CPC0_SYS0_FBDV_MASK) >> 18) - 1) & 0xf) + 1)
#define   CPC0_SYS0_FWDVA(reg) \
                (8 - (((reg) & CPC0_SYS0_FWDVA_MASK) >> 15))
#define   CPC0_SYS0_FWDVB(reg) \
                (8 - (((reg) & CPC0_SYS0_FWDVB_MASK) >> 12))
#define   CPC0_SYS0_OPDV(reg) \
                ((((reg) & CPC0_SYS0_OPDV_MASK) >> 10) + 1)
#define   CPC0_SYS0_EPDV(reg) \
                ((((reg) & CPC0_SYS0_EPDV_MASK) >> 8) + 1)
#define   CPC0_SYS0_EXTSL                                 0x00000080
#define   CPC0_SYS0_RW_MASK                               0x00000060
#define   CPC0_SYS0_RL                                    0x00000010
#define   CPC0_SYS0_ZMIISL_MASK                           0x0000000c
#define   CPC0_SYS0_BYPASS                                0x00000002
#define   CPC0_SYS0_NTO1                                  0x00000001
#define DCRN_CPC0_SYS1                                  0x0e1
#define DCRN_CPC0_CUST0                                 0x0e2
#define DCRN_CPC0_CUST1                                 0x0e3
#define DCRN_CPC0_STRP0                                 0x0e4
#define DCRN_CPC0_STRP1                                 0x0e5
#define DCRN_CPC0_STRP2                                 0x0e6
#define DCRN_CPC0_STRP3                                 0x0e7
#define DCRN_CPC0_GPIO                                  0x0e8
#define DCRN_CPC0_PLB                                   0x0e9
#define DCRN_CPC0_CR1                                   0x0ea
#define DCRN_CPC0_CR0                                   0x0eb
#define   CPC0_CR0_SWE                                    0x80000000
#define   CPC0_CR0_CETE                                   0x40000000
#define   CPC0_CR0_U1FCS                                  0x20000000
#define   CPC0_CR0_U0DTE                                  0x10000000
#define   CPC0_CR0_U0DRE                                  0x08000000
#define   CPC0_CR0_U0DC                                   0x04000000
#define   CPC0_CR0_U1DTE                                  0x02000000
#define   CPC0_CR0_U1DRE                                  0x01000000
#define   CPC0_CR0_U1DC                                   0x00800000
#define   CPC0_CR0_U0EC                                   0x00400000
#define   CPC0_CR0_U1EC                                   0x00200000
#define   CPC0_CR0_UDIV_MASK                              0x001f0000
#define   CPC0_CR0_UDIV(reg) \
                ((((reg) & CPC0_CR0_UDIV_MASK) >> 16) + 1)
#define DCRN_CPC0_MIRQ0                                 0x0ec
#define DCRN_CPC0_MIRQ1                                 0x0ed
#define DCRN_CPC0_JTAGID                                0x0ef

#define DCRN_MAL0_CFG                                   0x180
#define MAL_RESET 0x80000000

/* 440EP Clock/Power-on Reset regs */
#define DCRN_CPR0_ADDR  0xc
#define DCRN_CPR0_DATA  0xd
#define CPR0_PLLD0      0x60
#define CPR0_OPBD0      0xc0
#define CPR0_PERD0      0xe0
#define CPR0_PRIMBD0    0xa0
#define CPR0_SCPID      0x120
#define CPR0_PLLC0      0x40

/* 440GX/405EX Clock Control reg */
#define DCRN_CPR0_CLKUPD                                0x020
#define DCRN_CPR0_PLLC                                  0x040
#define DCRN_CPR0_PLLD                                  0x060
#define DCRN_CPR0_PRIMAD                                0x080
#define DCRN_CPR0_PRIMBD                                0x0a0
#define DCRN_CPR0_OPBD                                  0x0c0
#define DCRN_CPR0_PERD                                  0x0e0
#define DCRN_CPR0_MALD                                  0x100

#define DCRN_SDR0_CONFIG_ADDR   0xe
#define DCRN_SDR0_CONFIG_DATA   0xf

/* SDR read/write helper macros */
#define SDR0_READ(offset) ({\
        mtdcr(DCRN_SDR0_CONFIG_ADDR, offset); \
        mfdcr(DCRN_SDR0_CONFIG_DATA); })
#define SDR0_WRITE(offset, data) ({\
        mtdcr(DCRN_SDR0_CONFIG_ADDR, offset); \
        mtdcr(DCRN_SDR0_CONFIG_DATA, data); })

#define DCRN_SDR0_UART0         0x0120
#define DCRN_SDR0_UART1         0x0121
#define DCRN_SDR0_UART2         0x0122
#define DCRN_SDR0_UART3         0x0123


/* CPRs read/write helper macros - based off include/asm-ppc/ibm44x.h */

#define DCRN_CPR0_CFGADDR                               0xc
#define DCRN_CPR0_CFGDATA                               0xd

#define CPR0_READ(offset) ({\
        mtdcr(DCRN_CPR0_CFGADDR, offset); \
        mfdcr(DCRN_CPR0_CFGDATA); })
#define CPR0_WRITE(offset, data) ({\
        mtdcr(DCRN_CPR0_CFGADDR, offset); \
        mtdcr(DCRN_CPR0_CFGDATA, data); })



#endif  /* _PPC_BOOT_DCR_H_ */