/*

 * Intel XScale PXA255/270 processor support.

 *

 * Copyright (c) 2006 Openedhand Ltd.

 * Written by Andrzej Zaborowski <balrog@zabor.org>

 *

 * This code is licenced under the GPL.

 */

#include "hw.h"

#include "pxa.h"

#include "sysemu.h"

#include "pc.h"

#include "i2c.h"

#include "qemu-timer.h"

#include "qemu-char.h"

static struct {

    target_phys_addr_t io_base;

    int irqn;

} pxa255_serial[] = {

    { 0x40100000, PXA2XX_PIC_FFUART },

    { 0x40200000, PXA2XX_PIC_BTUART },

    { 0x40700000, PXA2XX_PIC_STUART },

    { 0x41600000, PXA25X_PIC_HWUART },

    { 0, 0 }

}, pxa270_serial[] = {

    { 0x40100000, PXA2XX_PIC_FFUART },

    { 0x40200000, PXA2XX_PIC_BTUART },

    { 0x40700000, PXA2XX_PIC_STUART },

    { 0, 0 }

};

typedef struct PXASSPDef {

    target_phys_addr_t io_base;

    int irqn;

} PXASSPDef;

#if 0

static PXASSPDef pxa250_ssp[] = {

    { 0x41000000, PXA2XX_PIC_SSP },

    { 0, 0 }

};

#endif

static PXASSPDef pxa255_ssp[] = {

    { 0x41000000, PXA2XX_PIC_SSP },

    { 0x41400000, PXA25X_PIC_NSSP },

    { 0, 0 }

};

#if 0

static PXASSPDef pxa26x_ssp[] = {

    { 0x41000000, PXA2XX_PIC_SSP },

    { 0x41400000, PXA25X_PIC_NSSP },

    { 0x41500000, PXA26X_PIC_ASSP },

    { 0, 0 }

};

#endif

static PXASSPDef pxa27x_ssp[] = {

    { 0x41000000, PXA2XX_PIC_SSP },

    { 0x41700000, PXA27X_PIC_SSP2 },

    { 0x41900000, PXA2XX_PIC_SSP3 },

    { 0, 0 }

};

#define PMCR	0x00	/* Power Manager Control register */

#define PSSR	0x04	/* Power Manager Sleep Status register */

#define PSPR	0x08	/* Power Manager Scratch-Pad register */

#define PWER	0x0c	/* Power Manager Wake-Up Enable register */

#define PRER	0x10	/* Power Manager Rising-Edge Detect Enable register */

#define PFER	0x14	/* Power Manager Falling-Edge Detect Enable register */

#define PEDR	0x18	/* Power Manager Edge-Detect Status register */

#define PCFR	0x1c	/* Power Manager General Configuration register */

#define PGSR0	0x20	/* Power Manager GPIO Sleep-State register 0 */

#define PGSR1	0x24	/* Power Manager GPIO Sleep-State register 1 */

#define PGSR2	0x28	/* Power Manager GPIO Sleep-State register 2 */

#define PGSR3	0x2c	/* Power Manager GPIO Sleep-State register 3 */

#define RCSR	0x30	/* Reset Controller Status register */

#define PSLR	0x34	/* Power Manager Sleep Configuration register */

#define PTSR	0x38	/* Power Manager Standby Configuration register */

#define PVCR	0x40	/* Power Manager Voltage Change Control register */

#define PUCR	0x4c	/* Power Manager USIM Card Control/Status register */

#define PKWR	0x50	/* Power Manager Keyboard Wake-Up Enable register */

#define PKSR	0x54	/* Power Manager Keyboard Level-Detect Status */

#define PCMD0	0x80	/* Power Manager I2C Command register File 0 */

#define PCMD31	0xfc	/* Power Manager I2C Command register File 31 */

static uint32_t pxa2xx_pm_read(void *opaque, target_phys_addr_t addr)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case PMCR ... PCMD31:

        if (addr & 3)

            goto fail;

        return s->pm_regs[addr >> 2];

    default:

    fail:

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

    return 0;

}

static void pxa2xx_pm_write(void *opaque, target_phys_addr_t addr,

                uint32_t value)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case PMCR:

        s->pm_regs[addr >> 2] &= 0x15 & ~(value & 0x2a);

        s->pm_regs[addr >> 2] |= value & 0x15;

        break;

    case PSSR:	/* Read-clean registers */

    case RCSR:

    case PKSR:

        s->pm_regs[addr >> 2] &= ~value;

        break;

    default:	/* Read-write registers */

        if (addr >= PMCR && addr <= PCMD31 && !(addr & 3)) {

            s->pm_regs[addr >> 2] = value;

            break;

        }

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

}

static CPUReadMemoryFunc *pxa2xx_pm_readfn[] = {

    pxa2xx_pm_read,

    pxa2xx_pm_read,

    pxa2xx_pm_read,

};

static CPUWriteMemoryFunc *pxa2xx_pm_writefn[] = {

    pxa2xx_pm_write,

    pxa2xx_pm_write,

    pxa2xx_pm_write,

};

static void pxa2xx_pm_save(QEMUFile *f, void *opaque)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    int i;

    for (i = 0; i < 0x40; i ++)

        qemu_put_be32s(f, &s->pm_regs[i]);

}

static int pxa2xx_pm_load(QEMUFile *f, void *opaque, int version_id)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    int i;

    for (i = 0; i < 0x40; i ++)

        qemu_get_be32s(f, &s->pm_regs[i]);

    return 0;

}

#define CCCR	0x00	/* Core Clock Configuration register */

#define CKEN	0x04	/* Clock Enable register */

#define OSCC	0x08	/* Oscillator Configuration register */

#define CCSR	0x0c	/* Core Clock Status register */

static uint32_t pxa2xx_cm_read(void *opaque, target_phys_addr_t addr)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case CCCR:

    case CKEN:

    case OSCC:

        return s->cm_regs[addr >> 2];

    case CCSR:

        return s->cm_regs[CCCR >> 2] | (3 << 28);

    default:

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

    return 0;

}

static void pxa2xx_cm_write(void *opaque, target_phys_addr_t addr,

                uint32_t value)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case CCCR:

    case CKEN:

        s->cm_regs[addr >> 2] = value;

        break;

    case OSCC:

        s->cm_regs[addr >> 2] &= ~0x6c;

        s->cm_regs[addr >> 2] |= value & 0x6e;

        if ((value >> 1) & 1)			/* OON */

            s->cm_regs[addr >> 2] |= 1 << 0;	/* Oscillator is now stable */

        break;

    default:

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

}

static CPUReadMemoryFunc *pxa2xx_cm_readfn[] = {

    pxa2xx_cm_read,

    pxa2xx_cm_read,

    pxa2xx_cm_read,

};

static CPUWriteMemoryFunc *pxa2xx_cm_writefn[] = {

    pxa2xx_cm_write,

    pxa2xx_cm_write,

    pxa2xx_cm_write,

};

static void pxa2xx_cm_save(QEMUFile *f, void *opaque)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    int i;

    for (i = 0; i < 4; i ++)

        qemu_put_be32s(f, &s->cm_regs[i]);

    qemu_put_be32s(f, &s->clkcfg);

    qemu_put_be32s(f, &s->pmnc);

}

static int pxa2xx_cm_load(QEMUFile *f, void *opaque, int version_id)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    int i;

    for (i = 0; i < 4; i ++)

        qemu_get_be32s(f, &s->cm_regs[i]);

    qemu_get_be32s(f, &s->clkcfg);

    qemu_get_be32s(f, &s->pmnc);

    return 0;

}

static uint32_t pxa2xx_clkpwr_read(void *opaque, int op2, int reg, int crm)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (reg) {

    case 6:	/* Clock Configuration register */

        return s->clkcfg;

    case 7:	/* Power Mode register */

        return 0;

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

    return 0;

}

static void pxa2xx_clkpwr_write(void *opaque, int op2, int reg, int crm,

                uint32_t value)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    static const char *pwrmode[8] = {

        "Normal", "Idle", "Deep-idle", "Standby",

        "Sleep", "reserved (!)", "reserved (!)", "Deep-sleep",

    };

    switch (reg) {

    case 6:	/* Clock Configuration register */

        s->clkcfg = value & 0xf;

        if (value & 2)

            printf("%s: CPU frequency change attempt\n", __FUNCTION__);

        break;

    case 7:	/* Power Mode register */

        if (value & 8)

            printf("%s: CPU voltage change attempt\n", __FUNCTION__);

        switch (value & 7) {

        case 0:

            /* Do nothing */

            break;

        case 1:

            /* Idle */

            if (!(s->cm_regs[CCCR >> 2] & (1 << 31))) {	/* CPDIS */

                cpu_interrupt(s->env, CPU_INTERRUPT_HALT);

                break;

            }

            /* Fall through.  */

        case 2:

            /* Deep-Idle */

            cpu_interrupt(s->env, CPU_INTERRUPT_HALT);

            s->pm_regs[RCSR >> 2] |= 0x8;	/* Set GPR */

            goto message;

        case 3:

            s->env->uncached_cpsr =

                    ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I;

            s->env->cp15.c1_sys = 0;

            s->env->cp15.c1_coproc = 0;

            s->env->cp15.c2_base0 = 0;

            s->env->cp15.c3 = 0;

            s->pm_regs[PSSR >> 2] |= 0x8;	/* Set STS */

            s->pm_regs[RCSR >> 2] |= 0x8;	/* Set GPR */

            /*

             * The scratch-pad register is almost universally used

             * for storing the return address on suspend.  For the

             * lack of a resuming bootloader, perform a jump

             * directly to that address.

             */

            memset(s->env->regs, 0, 4 * 15);

            s->env->regs[15] = s->pm_regs[PSPR >> 2];

#if 0

            buffer = 0xe59ff000;	/* ldr     pc, [pc, #0] */

            cpu_physical_memory_write(0, &buffer, 4);

            buffer = s->pm_regs[PSPR >> 2];

            cpu_physical_memory_write(8, &buffer, 4);

#endif

            /* Suspend */

            cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HALT);

            goto message;

        default:

        message:

            printf("%s: machine entered %s mode\n", __FUNCTION__,

                            pwrmode[value & 7]);

        }

        break;

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

}

/* Performace Monitoring Registers */

#define CPPMNC		0	/* Performance Monitor Control register */

#define CPCCNT		1	/* Clock Counter register */

#define CPINTEN		4	/* Interrupt Enable register */

#define CPFLAG		5	/* Overflow Flag register */

#define CPEVTSEL	8	/* Event Selection register */

#define CPPMN0		0	/* Performance Count register 0 */

#define CPPMN1		1	/* Performance Count register 1 */

#define CPPMN2		2	/* Performance Count register 2 */

#define CPPMN3		3	/* Performance Count register 3 */

static uint32_t pxa2xx_perf_read(void *opaque, int op2, int reg, int crm)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (reg) {

    case CPPMNC:

        return s->pmnc;

    case CPCCNT:

        if (s->pmnc & 1)

            return qemu_get_clock(vm_clock);

        else

            return 0;

    case CPINTEN:

    case CPFLAG:

    case CPEVTSEL:

        return 0;

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

    return 0;

}

static void pxa2xx_perf_write(void *opaque, int op2, int reg, int crm,

                uint32_t value)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (reg) {

    case CPPMNC:

        s->pmnc = value;

        break;

    case CPCCNT:

    case CPINTEN:

    case CPFLAG:

    case CPEVTSEL:

        break;

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

}

static uint32_t pxa2xx_cp14_read(void *opaque, int op2, int reg, int crm)

{

    switch (crm) {

    case 0:

        return pxa2xx_clkpwr_read(opaque, op2, reg, crm);

    case 1:

        return pxa2xx_perf_read(opaque, op2, reg, crm);

    case 2:

        switch (reg) {

        case CPPMN0:

        case CPPMN1:

        case CPPMN2:

        case CPPMN3:

            return 0;

        }

        /* Fall through */

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

    return 0;

}

static void pxa2xx_cp14_write(void *opaque, int op2, int reg, int crm,

                uint32_t value)

{

    switch (crm) {

    case 0:

        pxa2xx_clkpwr_write(opaque, op2, reg, crm, value);

        break;

    case 1:

        pxa2xx_perf_write(opaque, op2, reg, crm, value);

        break;

    case 2:

        switch (reg) {

        case CPPMN0:

        case CPPMN1:

        case CPPMN2:

        case CPPMN3:

            return;

        }

        /* Fall through */

    default:

        printf("%s: Bad register 0x%x\n", __FUNCTION__, reg);

        break;

    }

}

#define MDCNFG		0x00	/* SDRAM Configuration register */

#define MDREFR		0x04	/* SDRAM Refresh Control register */

#define MSC0		0x08	/* Static Memory Control register 0 */

#define MSC1		0x0c	/* Static Memory Control register 1 */

#define MSC2		0x10	/* Static Memory Control register 2 */

#define MECR		0x14	/* Expansion Memory Bus Config register */

#define SXCNFG		0x1c	/* Synchronous Static Memory Config register */

#define MCMEM0		0x28	/* PC Card Memory Socket 0 Timing register */

#define MCMEM1		0x2c	/* PC Card Memory Socket 1 Timing register */

#define MCATT0		0x30	/* PC Card Attribute Socket 0 register */

#define MCATT1		0x34	/* PC Card Attribute Socket 1 register */

#define MCIO0		0x38	/* PC Card I/O Socket 0 Timing register */

#define MCIO1		0x3c	/* PC Card I/O Socket 1 Timing register */

#define MDMRS		0x40	/* SDRAM Mode Register Set Config register */

#define BOOT_DEF	0x44	/* Boot-time Default Configuration register */

#define ARB_CNTL	0x48	/* Arbiter Control register */

#define BSCNTR0		0x4c	/* Memory Buffer Strength Control register 0 */

#define BSCNTR1		0x50	/* Memory Buffer Strength Control register 1 */

#define LCDBSCNTR	0x54	/* LCD Buffer Strength Control register */

#define MDMRSLP		0x58	/* Low Power SDRAM Mode Set Config register */

#define BSCNTR2		0x5c	/* Memory Buffer Strength Control register 2 */

#define BSCNTR3		0x60	/* Memory Buffer Strength Control register 3 */

#define SA1110		0x64	/* SA-1110 Memory Compatibility register */

static uint32_t pxa2xx_mm_read(void *opaque, target_phys_addr_t addr)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case MDCNFG ... SA1110:

        if ((addr & 3) == 0)

            return s->mm_regs[addr >> 2];

    default:

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

    return 0;

}

static void pxa2xx_mm_write(void *opaque, target_phys_addr_t addr,

                uint32_t value)

{

    struct pxa2xx_state_s *s = (struct pxa2xx_state_s *) opaque;

    switch (addr) {

    case MDCNFG ... SA1110:

        if ((addr & 3) == 0) {

            s->mm_regs[addr >> 2] = value;

            break;

        }

    default:

        printf("%s: Bad register " REG_FMT "\n", __FUNCTION__, addr);

        break;

    }

}

static CPUReadMemoryFunc *pxa2xx_mm_readfn[] = {

    pxa2xx_mm_read,

    pxa2xx_mm_read,

    pxa2xx_mm_read,

};

static CPUWriteMemoryFunc *pxa2xx_mm_writefn[] = {

    pxa2xx_mm_write,

    pxa2xx_mm_write,

    pxa2xx_mm_write,

};