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qemu-e2k/hw/arm/stellaris.c

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/*
* Luminary Micro Stellaris peripherals
*
* Copyright (c) 2006 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GPL.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "hw/ssi/ssi.h"
#include "hw/arm/arm.h"
#include "hw/devices.h"
#include "qemu/timer.h"
#include "hw/i2c/i2c.h"
#include "net/net.h"
#include "hw/boards.h"
#include "exec/address-spaces.h"
#include "sysemu/sysemu.h"
#define GPIO_A 0
#define GPIO_B 1
#define GPIO_C 2
#define GPIO_D 3
#define GPIO_E 4
#define GPIO_F 5
#define GPIO_G 6
#define BP_OLED_I2C 0x01
#define BP_OLED_SSI 0x02
#define BP_GAMEPAD 0x04
#define NUM_IRQ_LINES 64
typedef const struct {
const char *name;
uint32_t did0;
uint32_t did1;
uint32_t dc0;
uint32_t dc1;
uint32_t dc2;
uint32_t dc3;
uint32_t dc4;
uint32_t peripherals;
} stellaris_board_info;
/* General purpose timer module. */
#define TYPE_STELLARIS_GPTM "stellaris-gptm"
#define STELLARIS_GPTM(obj) \
OBJECT_CHECK(gptm_state, (obj), TYPE_STELLARIS_GPTM)
typedef struct gptm_state {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint32_t config;
uint32_t mode[2];
uint32_t control;
uint32_t state;
uint32_t mask;
uint32_t load[2];
uint32_t match[2];
uint32_t prescale[2];
uint32_t match_prescale[2];
uint32_t rtc;
int64_t tick[2];
struct gptm_state *opaque[2];
QEMUTimer *timer[2];
/* The timers have an alternate output used to trigger the ADC. */
qemu_irq trigger;
qemu_irq irq;
} gptm_state;
static void gptm_update_irq(gptm_state *s)
{
int level;
level = (s->state & s->mask) != 0;
qemu_set_irq(s->irq, level);
}
static void gptm_stop(gptm_state *s, int n)
{
timer_del(s->timer[n]);
}
static void gptm_reload(gptm_state *s, int n, int reset)
{
int64_t tick;
if (reset)
tick = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
else
tick = s->tick[n];
if (s->config == 0) {
/* 32-bit CountDown. */
uint32_t count;
count = s->load[0] | (s->load[1] << 16);
tick += (int64_t)count * system_clock_scale;
} else if (s->config == 1) {
/* 32-bit RTC. 1Hz tick. */
tick += get_ticks_per_sec();
} else if (s->mode[n] == 0xa) {
/* PWM mode. Not implemented. */
} else {
hw_error("TODO: 16-bit timer mode 0x%x\n", s->mode[n]);
}
s->tick[n] = tick;
timer_mod(s->timer[n], tick);
}
static void gptm_tick(void *opaque)
{
gptm_state **p = (gptm_state **)opaque;
gptm_state *s;
int n;
s = *p;
n = p - s->opaque;
if (s->config == 0) {
s->state |= 1;
if ((s->control & 0x20)) {
/* Output trigger. */
qemu_irq_pulse(s->trigger);
}
if (s->mode[0] & 1) {
/* One-shot. */
s->control &= ~1;
} else {
/* Periodic. */
gptm_reload(s, 0, 0);
}
} else if (s->config == 1) {
/* RTC. */
uint32_t match;
s->rtc++;
match = s->match[0] | (s->match[1] << 16);
if (s->rtc > match)
s->rtc = 0;
if (s->rtc == 0) {
s->state |= 8;
}
gptm_reload(s, 0, 0);
} else if (s->mode[n] == 0xa) {
/* PWM mode. Not implemented. */
} else {
hw_error("TODO: 16-bit timer mode 0x%x\n", s->mode[n]);
}
gptm_update_irq(s);
}
static uint64_t gptm_read(void *opaque, hwaddr offset,
unsigned size)
{
gptm_state *s = (gptm_state *)opaque;
switch (offset) {
case 0x00: /* CFG */
return s->config;
case 0x04: /* TAMR */
return s->mode[0];
case 0x08: /* TBMR */
return s->mode[1];
case 0x0c: /* CTL */
return s->control;
case 0x18: /* IMR */
return s->mask;
case 0x1c: /* RIS */
return s->state;
case 0x20: /* MIS */
return s->state & s->mask;
case 0x24: /* CR */
return 0;
case 0x28: /* TAILR */
return s->load[0] | ((s->config < 4) ? (s->load[1] << 16) : 0);
case 0x2c: /* TBILR */
return s->load[1];
case 0x30: /* TAMARCHR */
return s->match[0] | ((s->config < 4) ? (s->match[1] << 16) : 0);
case 0x34: /* TBMATCHR */
return s->match[1];
case 0x38: /* TAPR */
return s->prescale[0];
case 0x3c: /* TBPR */
return s->prescale[1];
case 0x40: /* TAPMR */
return s->match_prescale[0];
case 0x44: /* TBPMR */
return s->match_prescale[1];
case 0x48: /* TAR */
if (s->config == 1) {
return s->rtc;
}
qemu_log_mask(LOG_UNIMP,
"GPTM: read of TAR but timer read not supported");
return 0;
case 0x4c: /* TBR */
qemu_log_mask(LOG_UNIMP,
"GPTM: read of TBR but timer read not supported");
return 0;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"GPTM: read at bad offset 0x%x\n", (int)offset);
return 0;
}
}
static void gptm_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
gptm_state *s = (gptm_state *)opaque;
uint32_t oldval;
/* The timers should be disabled before changing the configuration.
We take advantage of this and defer everything until the timer
is enabled. */
switch (offset) {
case 0x00: /* CFG */
s->config = value;
break;
case 0x04: /* TAMR */
s->mode[0] = value;
break;
case 0x08: /* TBMR */
s->mode[1] = value;
break;
case 0x0c: /* CTL */
oldval = s->control;
s->control = value;
/* TODO: Implement pause. */
if ((oldval ^ value) & 1) {
if (value & 1) {
gptm_reload(s, 0, 1);
} else {
gptm_stop(s, 0);
}
}
if (((oldval ^ value) & 0x100) && s->config >= 4) {
if (value & 0x100) {
gptm_reload(s, 1, 1);
} else {
gptm_stop(s, 1);
}
}
break;
case 0x18: /* IMR */
s->mask = value & 0x77;
gptm_update_irq(s);
break;
case 0x24: /* CR */
s->state &= ~value;
break;
case 0x28: /* TAILR */
s->load[0] = value & 0xffff;
if (s->config < 4) {
s->load[1] = value >> 16;
}
break;
case 0x2c: /* TBILR */
s->load[1] = value & 0xffff;
break;
case 0x30: /* TAMARCHR */
s->match[0] = value & 0xffff;
if (s->config < 4) {
s->match[1] = value >> 16;
}
break;
case 0x34: /* TBMATCHR */
s->match[1] = value >> 16;
break;
case 0x38: /* TAPR */
s->prescale[0] = value;
break;
case 0x3c: /* TBPR */
s->prescale[1] = value;
break;
case 0x40: /* TAPMR */
s->match_prescale[0] = value;
break;
case 0x44: /* TBPMR */
s->match_prescale[0] = value;
break;
default:
hw_error("gptm_write: Bad offset 0x%x\n", (int)offset);
}
gptm_update_irq(s);
}
static const MemoryRegionOps gptm_ops = {
.read = gptm_read,
.write = gptm_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_stellaris_gptm = {
.name = "stellaris_gptm",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(config, gptm_state),
VMSTATE_UINT32_ARRAY(mode, gptm_state, 2),
VMSTATE_UINT32(control, gptm_state),
VMSTATE_UINT32(state, gptm_state),
VMSTATE_UINT32(mask, gptm_state),
VMSTATE_UNUSED(8),
VMSTATE_UINT32_ARRAY(load, gptm_state, 2),
VMSTATE_UINT32_ARRAY(match, gptm_state, 2),
VMSTATE_UINT32_ARRAY(prescale, gptm_state, 2),
VMSTATE_UINT32_ARRAY(match_prescale, gptm_state, 2),
VMSTATE_UINT32(rtc, gptm_state),
VMSTATE_INT64_ARRAY(tick, gptm_state, 2),
VMSTATE_TIMER_PTR_ARRAY(timer, gptm_state, 2),
VMSTATE_END_OF_LIST()
}
};
static int stellaris_gptm_init(SysBusDevice *sbd)
{
DeviceState *dev = DEVICE(sbd);
gptm_state *s = STELLARIS_GPTM(dev);
sysbus_init_irq(sbd, &s->irq);
qdev_init_gpio_out(dev, &s->trigger, 1);
memory_region_init_io(&s->iomem, OBJECT(s), &gptm_ops, s,
"gptm", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
s->opaque[0] = s->opaque[1] = s;
s->timer[0] = timer_new_ns(QEMU_CLOCK_VIRTUAL, gptm_tick, &s->opaque[0]);
s->timer[1] = timer_new_ns(QEMU_CLOCK_VIRTUAL, gptm_tick, &s->opaque[1]);
vmstate_register(dev, -1, &vmstate_stellaris_gptm, s);
return 0;
}
/* System controller. */
typedef struct {
MemoryRegion iomem;
uint32_t pborctl;
uint32_t ldopctl;
uint32_t int_status;
uint32_t int_mask;
uint32_t resc;
uint32_t rcc;
uint32_t rcc2;
uint32_t rcgc[3];
uint32_t scgc[3];
uint32_t dcgc[3];
uint32_t clkvclr;
uint32_t ldoarst;
uint32_t user0;
uint32_t user1;
qemu_irq irq;
stellaris_board_info *board;
} ssys_state;
static void ssys_update(ssys_state *s)
{
qemu_set_irq(s->irq, (s->int_status & s->int_mask) != 0);
}
static uint32_t pllcfg_sandstorm[16] = {
0x31c0, /* 1 Mhz */
0x1ae0, /* 1.8432 Mhz */
0x18c0, /* 2 Mhz */
0xd573, /* 2.4576 Mhz */
0x37a6, /* 3.57954 Mhz */
0x1ae2, /* 3.6864 Mhz */
0x0c40, /* 4 Mhz */
0x98bc, /* 4.906 Mhz */
0x935b, /* 4.9152 Mhz */
0x09c0, /* 5 Mhz */
0x4dee, /* 5.12 Mhz */
0x0c41, /* 6 Mhz */
0x75db, /* 6.144 Mhz */
0x1ae6, /* 7.3728 Mhz */
0x0600, /* 8 Mhz */
0x585b /* 8.192 Mhz */
};
static uint32_t pllcfg_fury[16] = {
0x3200, /* 1 Mhz */
0x1b20, /* 1.8432 Mhz */
0x1900, /* 2 Mhz */
0xf42b, /* 2.4576 Mhz */
0x37e3, /* 3.57954 Mhz */
0x1b21, /* 3.6864 Mhz */
0x0c80, /* 4 Mhz */
0x98ee, /* 4.906 Mhz */
0xd5b4, /* 4.9152 Mhz */
0x0a00, /* 5 Mhz */
0x4e27, /* 5.12 Mhz */
0x1902, /* 6 Mhz */
0xec1c, /* 6.144 Mhz */
0x1b23, /* 7.3728 Mhz */
0x0640, /* 8 Mhz */
0xb11c /* 8.192 Mhz */
};
#define DID0_VER_MASK 0x70000000
#define DID0_VER_0 0x00000000
#define DID0_VER_1 0x10000000
#define DID0_CLASS_MASK 0x00FF0000
#define DID0_CLASS_SANDSTORM 0x00000000
#define DID0_CLASS_FURY 0x00010000
static int ssys_board_class(const ssys_state *s)
{
uint32_t did0 = s->board->did0;
switch (did0 & DID0_VER_MASK) {
case DID0_VER_0:
return DID0_CLASS_SANDSTORM;
case DID0_VER_1:
switch (did0 & DID0_CLASS_MASK) {
case DID0_CLASS_SANDSTORM:
case DID0_CLASS_FURY:
return did0 & DID0_CLASS_MASK;
}
/* for unknown classes, fall through */
default:
hw_error("ssys_board_class: Unknown class 0x%08x\n", did0);
}
}
static uint64_t ssys_read(void *opaque, hwaddr offset,
unsigned size)
{
ssys_state *s = (ssys_state *)opaque;
switch (offset) {
case 0x000: /* DID0 */
return s->board->did0;
case 0x004: /* DID1 */
return s->board->did1;
case 0x008: /* DC0 */
return s->board->dc0;
case 0x010: /* DC1 */
return s->board->dc1;
case 0x014: /* DC2 */
return s->board->dc2;
case 0x018: /* DC3 */
return s->board->dc3;
case 0x01c: /* DC4 */
return s->board->dc4;
case 0x030: /* PBORCTL */
return s->pborctl;
case 0x034: /* LDOPCTL */
return s->ldopctl;
case 0x040: /* SRCR0 */
return 0;
case 0x044: /* SRCR1 */
return 0;
case 0x048: /* SRCR2 */
return 0;
case 0x050: /* RIS */
return s->int_status;
case 0x054: /* IMC */
return s->int_mask;
case 0x058: /* MISC */
return s->int_status & s->int_mask;
case 0x05c: /* RESC */
return s->resc;
case 0x060: /* RCC */
return s->rcc;
case 0x064: /* PLLCFG */
{
int xtal;
xtal = (s->rcc >> 6) & 0xf;
switch (ssys_board_class(s)) {
case DID0_CLASS_FURY:
return pllcfg_fury[xtal];
case DID0_CLASS_SANDSTORM:
return pllcfg_sandstorm[xtal];
default:
hw_error("ssys_read: Unhandled class for PLLCFG read.\n");
return 0;
}
}
case 0x070: /* RCC2 */
return s->rcc2;
case 0x100: /* RCGC0 */
return s->rcgc[0];
case 0x104: /* RCGC1 */
return s->rcgc[1];
case 0x108: /* RCGC2 */
return s->rcgc[2];
case 0x110: /* SCGC0 */
return s->scgc[0];
case 0x114: /* SCGC1 */
return s->scgc[1];
case 0x118: /* SCGC2 */
return s->scgc[2];
case 0x120: /* DCGC0 */
return s->dcgc[0];
case 0x124: /* DCGC1 */
return s->dcgc[1];
case 0x128: /* DCGC2 */
return s->dcgc[2];
case 0x150: /* CLKVCLR */
return s->clkvclr;
case 0x160: /* LDOARST */
return s->ldoarst;
case 0x1e0: /* USER0 */
return s->user0;
case 0x1e4: /* USER1 */
return s->user1;
default:
hw_error("ssys_read: Bad offset 0x%x\n", (int)offset);
return 0;
}
}
static bool ssys_use_rcc2(ssys_state *s)
{
return (s->rcc2 >> 31) & 0x1;
}
/*
* Caculate the sys. clock period in ms.
*/
static void ssys_calculate_system_clock(ssys_state *s)
{
if (ssys_use_rcc2(s)) {
system_clock_scale = 5 * (((s->rcc2 >> 23) & 0x3f) + 1);
} else {
system_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1);
}
}
static void ssys_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
ssys_state *s = (ssys_state *)opaque;
switch (offset) {
case 0x030: /* PBORCTL */
s->pborctl = value & 0xffff;
break;
case 0x034: /* LDOPCTL */
s->ldopctl = value & 0x1f;
break;
case 0x040: /* SRCR0 */
case 0x044: /* SRCR1 */
case 0x048: /* SRCR2 */
fprintf(stderr, "Peripheral reset not implemented\n");
break;
case 0x054: /* IMC */
s->int_mask = value & 0x7f;
break;
case 0x058: /* MISC */
s->int_status &= ~value;
break;
case 0x05c: /* RESC */
s->resc = value & 0x3f;
break;
case 0x060: /* RCC */
if ((s->rcc & (1 << 13)) != 0 && (value & (1 << 13)) == 0) {
/* PLL enable. */
s->int_status |= (1 << 6);
}
s->rcc = value;
ssys_calculate_system_clock(s);
break;
case 0x070: /* RCC2 */
if (ssys_board_class(s) == DID0_CLASS_SANDSTORM) {
break;
}
if ((s->rcc2 & (1 << 13)) != 0 && (value & (1 << 13)) == 0) {
/* PLL enable. */
s->int_status |= (1 << 6);
}
s->rcc2 = value;
ssys_calculate_system_clock(s);
break;
case 0x100: /* RCGC0 */
s->rcgc[0] = value;
break;
case 0x104: /* RCGC1 */
s->rcgc[1] = value;
break;
case 0x108: /* RCGC2 */
s->rcgc[2] = value;
break;
case 0x110: /* SCGC0 */
s->scgc[0] = value;
break;
case 0x114: /* SCGC1 */
s->scgc[1] = value;
break;
case 0x118: /* SCGC2 */
s->scgc[2] = value;
break;
case 0x120: /* DCGC0 */
s->dcgc[0] = value;
break;
case 0x124: /* DCGC1 */
s->dcgc[1] = value;
break;
case 0x128: /* DCGC2 */
s->dcgc[2] = value;
break;
case 0x150: /* CLKVCLR */
s->clkvclr = value;
break;
case 0x160: /* LDOARST */
s->ldoarst = value;
break;
default:
hw_error("ssys_write: Bad offset 0x%x\n", (int)offset);
}
ssys_update(s);
}
static const MemoryRegionOps ssys_ops = {
.read = ssys_read,
.write = ssys_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void ssys_reset(void *opaque)
{
ssys_state *s = (ssys_state *)opaque;
s->pborctl = 0x7ffd;
s->rcc = 0x078e3ac0;
if (ssys_board_class(s) == DID0_CLASS_SANDSTORM) {
s->rcc2 = 0;
} else {
s->rcc2 = 0x07802810;
}
s->rcgc[0] = 1;
s->scgc[0] = 1;
s->dcgc[0] = 1;
ssys_calculate_system_clock(s);
}
static int stellaris_sys_post_load(void *opaque, int version_id)
{
ssys_state *s = opaque;
ssys_calculate_system_clock(s);
return 0;
}
static const VMStateDescription vmstate_stellaris_sys = {
.name = "stellaris_sys",
.version_id = 2,
.minimum_version_id = 1,
.post_load = stellaris_sys_post_load,
.fields = (VMStateField[]) {
VMSTATE_UINT32(pborctl, ssys_state),
VMSTATE_UINT32(ldopctl, ssys_state),
VMSTATE_UINT32(int_mask, ssys_state),
VMSTATE_UINT32(int_status, ssys_state),
VMSTATE_UINT32(resc, ssys_state),
VMSTATE_UINT32(rcc, ssys_state),
VMSTATE_UINT32_V(rcc2, ssys_state, 2),
VMSTATE_UINT32_ARRAY(rcgc, ssys_state, 3),
VMSTATE_UINT32_ARRAY(scgc, ssys_state, 3),
VMSTATE_UINT32_ARRAY(dcgc, ssys_state, 3),
VMSTATE_UINT32(clkvclr, ssys_state),
VMSTATE_UINT32(ldoarst, ssys_state),
VMSTATE_END_OF_LIST()
}
};
static int stellaris_sys_init(uint32_t base, qemu_irq irq,
stellaris_board_info * board,
uint8_t *macaddr)
{
ssys_state *s;
s = g_new0(ssys_state, 1);
s->irq = irq;
s->board = board;
/* Most devices come preprogrammed with a MAC address in the user data. */
s->user0 = macaddr[0] | (macaddr[1] << 8) | (macaddr[2] << 16);
s->user1 = macaddr[3] | (macaddr[4] << 8) | (macaddr[5] << 16);
memory_region_init_io(&s->iomem, NULL, &ssys_ops, s, "ssys", 0x00001000);
memory_region_add_subregion(get_system_memory(), base, &s->iomem);
ssys_reset(s);
vmstate_register(NULL, -1, &vmstate_stellaris_sys, s);
return 0;
}
/* I2C controller. */
#define TYPE_STELLARIS_I2C "stellaris-i2c"
#define STELLARIS_I2C(obj) \
OBJECT_CHECK(stellaris_i2c_state, (obj), TYPE_STELLARIS_I2C)
typedef struct {
SysBusDevice parent_obj;
I2CBus *bus;
qemu_irq irq;
MemoryRegion iomem;
uint32_t msa;
uint32_t mcs;
uint32_t mdr;
uint32_t mtpr;
uint32_t mimr;
uint32_t mris;
uint32_t mcr;
} stellaris_i2c_state;
#define STELLARIS_I2C_MCS_BUSY 0x01
#define STELLARIS_I2C_MCS_ERROR 0x02
#define STELLARIS_I2C_MCS_ADRACK 0x04
#define STELLARIS_I2C_MCS_DATACK 0x08
#define STELLARIS_I2C_MCS_ARBLST 0x10
#define STELLARIS_I2C_MCS_IDLE 0x20
#define STELLARIS_I2C_MCS_BUSBSY 0x40
static uint64_t stellaris_i2c_read(void *opaque, hwaddr offset,
unsigned size)
{
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque;
switch (offset) {
case 0x00: /* MSA */
return s->msa;
case 0x04: /* MCS */
/* We don't emulate timing, so the controller is never busy. */
return s->mcs | STELLARIS_I2C_MCS_IDLE;
case 0x08: /* MDR */
return s->mdr;
case 0x0c: /* MTPR */
return s->mtpr;
case 0x10: /* MIMR */
return s->mimr;
case 0x14: /* MRIS */
return s->mris;
case 0x18: /* MMIS */
return s->mris & s->mimr;
case 0x20: /* MCR */
return s->mcr;
default:
hw_error("strllaris_i2c_read: Bad offset 0x%x\n", (int)offset);
return 0;
}
}
static void stellaris_i2c_update(stellaris_i2c_state *s)
{
int level;
level = (s->mris & s->mimr) != 0;
qemu_set_irq(s->irq, level);
}
static void stellaris_i2c_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque;
switch (offset) {
case 0x00: /* MSA */
s->msa = value & 0xff;
break;
case 0x04: /* MCS */
if ((s->mcr & 0x10) == 0) {
/* Disabled. Do nothing. */
break;
}
/* Grab the bus if this is starting a transfer. */
if ((value & 2) && (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) {
if (i2c_start_transfer(s->bus, s->msa >> 1, s->msa & 1)) {
s->mcs |= STELLARIS_I2C_MCS_ARBLST;
} else {
s->mcs &= ~STELLARIS_I2C_MCS_ARBLST;
s->mcs |= STELLARIS_I2C_MCS_BUSBSY;
}
}
/* If we don't have the bus then indicate an error. */
if (!i2c_bus_busy(s->bus)
|| (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) {
s->mcs |= STELLARIS_I2C_MCS_ERROR;
break;
}
s->mcs &= ~STELLARIS_I2C_MCS_ERROR;
if (value & 1) {
/* Transfer a byte. */
/* TODO: Handle errors. */
if (s->msa & 1) {
/* Recv */
s->mdr = i2c_recv(s->bus) & 0xff;
} else {
/* Send */
i2c_send(s->bus, s->mdr);
}
/* Raise an interrupt. */
s->mris |= 1;
}
if (value & 4) {
/* Finish transfer. */
i2c_end_transfer(s->bus);
s->mcs &= ~STELLARIS_I2C_MCS_BUSBSY;
}
break;
case 0x08: /* MDR */
s->mdr = value & 0xff;
break;
case 0x0c: /* MTPR */
s->mtpr = value & 0xff;
break;
case 0x10: /* MIMR */
s->mimr = 1;
break;
case 0x1c: /* MICR */
s->mris &= ~value;
break;
case 0x20: /* MCR */
if (value & 1)
hw_error(
"stellaris_i2c_write: Loopback not implemented\n");
if (value & 0x20)
hw_error(
"stellaris_i2c_write: Slave mode not implemented\n");
s->mcr = value & 0x31;
break;
default:
hw_error("stellaris_i2c_write: Bad offset 0x%x\n",
(int)offset);
}
stellaris_i2c_update(s);
}
static void stellaris_i2c_reset(stellaris_i2c_state *s)
{
if (s->mcs & STELLARIS_I2C_MCS_BUSBSY)
i2c_end_transfer(s->bus);
s->msa = 0;
s->mcs = 0;
s->mdr = 0;
s->mtpr = 1;
s->mimr = 0;
s->mris = 0;
s->mcr = 0;
stellaris_i2c_update(s);
}
static const MemoryRegionOps stellaris_i2c_ops = {
.read = stellaris_i2c_read,
.write = stellaris_i2c_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_stellaris_i2c = {
.name = "stellaris_i2c",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(msa, stellaris_i2c_state),
VMSTATE_UINT32(mcs, stellaris_i2c_state),
VMSTATE_UINT32(mdr, stellaris_i2c_state),
VMSTATE_UINT32(mtpr, stellaris_i2c_state),
VMSTATE_UINT32(mimr, stellaris_i2c_state),
VMSTATE_UINT32(mris, stellaris_i2c_state),
VMSTATE_UINT32(mcr, stellaris_i2c_state),
VMSTATE_END_OF_LIST()
}
};
static int stellaris_i2c_init(SysBusDevice *sbd)
{
DeviceState *dev = DEVICE(sbd);
stellaris_i2c_state *s = STELLARIS_I2C(dev);
I2CBus *bus;
sysbus_init_irq(sbd, &s->irq);
bus = i2c_init_bus(dev, "i2c");
s->bus = bus;
memory_region_init_io(&s->iomem, OBJECT(s), &stellaris_i2c_ops, s,
"i2c", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
/* ??? For now we only implement the master interface. */
stellaris_i2c_reset(s);
vmstate_register(dev, -1, &vmstate_stellaris_i2c, s);
return 0;
}
/* Analogue to Digital Converter. This is only partially implemented,
enough for applications that use a combined ADC and timer tick. */
#define STELLARIS_ADC_EM_CONTROLLER 0
#define STELLARIS_ADC_EM_COMP 1
#define STELLARIS_ADC_EM_EXTERNAL 4
#define STELLARIS_ADC_EM_TIMER 5
#define STELLARIS_ADC_EM_PWM0 6
#define STELLARIS_ADC_EM_PWM1 7
#define STELLARIS_ADC_EM_PWM2 8
#define STELLARIS_ADC_FIFO_EMPTY 0x0100
#define STELLARIS_ADC_FIFO_FULL 0x1000
#define TYPE_STELLARIS_ADC "stellaris-adc"
#define STELLARIS_ADC(obj) \
OBJECT_CHECK(stellaris_adc_state, (obj), TYPE_STELLARIS_ADC)
typedef struct StellarisADCState {
SysBusDevice parent_obj;
MemoryRegion iomem;
uint32_t actss;
uint32_t ris;
uint32_t im;
uint32_t emux;
uint32_t ostat;
uint32_t ustat;
uint32_t sspri;
uint32_t sac;
struct {
uint32_t state;
uint32_t data[16];
} fifo[4];
uint32_t ssmux[4];
uint32_t ssctl[4];
uint32_t noise;
qemu_irq irq[4];
} stellaris_adc_state;
static uint32_t stellaris_adc_fifo_read(stellaris_adc_state *s, int n)
{
int tail;
tail = s->fifo[n].state & 0xf;
if (s->fifo[n].state & STELLARIS_ADC_FIFO_EMPTY) {
s->ustat |= 1 << n;
} else {
s->fifo[n].state = (s->fifo[n].state & ~0xf) | ((tail + 1) & 0xf);
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_FULL;
if (tail + 1 == ((s->fifo[n].state >> 4) & 0xf))
s->fifo[n].state |= STELLARIS_ADC_FIFO_EMPTY;
}
return s->fifo[n].data[tail];
}
static void stellaris_adc_fifo_write(stellaris_adc_state *s, int n,
uint32_t value)
{
int head;
/* TODO: Real hardware has limited size FIFOs. We have a full 16 entry
FIFO fir each sequencer. */
head = (s->fifo[n].state >> 4) & 0xf;
if (s->fifo[n].state & STELLARIS_ADC_FIFO_FULL) {
s->ostat |= 1 << n;
return;
}
s->fifo[n].data[head] = value;
head = (head + 1) & 0xf;
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_EMPTY;
s->fifo[n].state = (s->fifo[n].state & ~0xf0) | (head << 4);
if ((s->fifo[n].state & 0xf) == head)
s->fifo[n].state |= STELLARIS_ADC_FIFO_FULL;
}
static void stellaris_adc_update(stellaris_adc_state *s)
{
int level;
int n;
for (n = 0; n < 4; n++) {
level = (s->ris & s->im & (1 << n)) != 0;
qemu_set_irq(s->irq[n], level);
}
}
static void stellaris_adc_trigger(void *opaque, int irq, int level)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
int n;
for (n = 0; n < 4; n++) {
if ((s->actss & (1 << n)) == 0) {
continue;
}
if (((s->emux >> (n * 4)) & 0xff) != 5) {
continue;
}
/* Some applications use the ADC as a random number source, so introduce
some variation into the signal. */
s->noise = s->noise * 314159 + 1;
/* ??? actual inputs not implemented. Return an arbitrary value. */
stellaris_adc_fifo_write(s, n, 0x200 + ((s->noise >> 16) & 7));
s->ris |= (1 << n);
stellaris_adc_update(s);
}
}
static void stellaris_adc_reset(stellaris_adc_state *s)
{
int n;
for (n = 0; n < 4; n++) {
s->ssmux[n] = 0;
s->ssctl[n] = 0;
s->fifo[n].state = STELLARIS_ADC_FIFO_EMPTY;
}
}
static uint64_t stellaris_adc_read(void *opaque, hwaddr offset,
unsigned size)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
/* TODO: Implement this. */
if (offset >= 0x40 && offset < 0xc0) {
int n;
n = (offset - 0x40) >> 5;
switch (offset & 0x1f) {
case 0x00: /* SSMUX */
return s->ssmux[n];
case 0x04: /* SSCTL */
return s->ssctl[n];
case 0x08: /* SSFIFO */
return stellaris_adc_fifo_read(s, n);
case 0x0c: /* SSFSTAT */
return s->fifo[n].state;
default:
break;
}
}
switch (offset) {
case 0x00: /* ACTSS */
return s->actss;
case 0x04: /* RIS */
return s->ris;
case 0x08: /* IM */
return s->im;
case 0x0c: /* ISC */
return s->ris & s->im;
case 0x10: /* OSTAT */
return s->ostat;
case 0x14: /* EMUX */
return s->emux;
case 0x18: /* USTAT */
return s->ustat;
case 0x20: /* SSPRI */
return s->sspri;
case 0x30: /* SAC */
return s->sac;
default:
hw_error("strllaris_adc_read: Bad offset 0x%x\n",
(int)offset);
return 0;
}
}
static void stellaris_adc_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
stellaris_adc_state *s = (stellaris_adc_state *)opaque;
/* TODO: Implement this. */
if (offset >= 0x40 && offset < 0xc0) {
int n;
n = (offset - 0x40) >> 5;
switch (offset & 0x1f) {
case 0x00: /* SSMUX */
s->ssmux[n] = value & 0x33333333;
return;
case 0x04: /* SSCTL */
if (value != 6) {
hw_error("ADC: Unimplemented sequence %" PRIx64 "\n",
value);
}
s->ssctl[n] = value;
return;
default:
break;
}
}
switch (offset) {
case 0x00: /* ACTSS */
s->actss = value & 0xf;
break;
case 0x08: /* IM */
s->im = value;
break;
case 0x0c: /* ISC */
s->ris &= ~value;
break;
case 0x10: /* OSTAT */
s->ostat &= ~value;
break;
case 0x14: /* EMUX */
s->emux = value;
break;
case 0x18: /* USTAT */
s->ustat &= ~value;
break;
case 0x20: /* SSPRI */
s->sspri = value;
break;
case 0x28: /* PSSI */
hw_error("Not implemented: ADC sample initiate\n");
break;
case 0x30: /* SAC */
s->sac = value;
break;
default:
hw_error("stellaris_adc_write: Bad offset 0x%x\n", (int)offset);
}
stellaris_adc_update(s);
}
static const MemoryRegionOps stellaris_adc_ops = {
.read = stellaris_adc_read,
.write = stellaris_adc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static const VMStateDescription vmstate_stellaris_adc = {
.name = "stellaris_adc",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(actss, stellaris_adc_state),
VMSTATE_UINT32(ris, stellaris_adc_state),
VMSTATE_UINT32(im, stellaris_adc_state),
VMSTATE_UINT32(emux, stellaris_adc_state),
VMSTATE_UINT32(ostat, stellaris_adc_state),
VMSTATE_UINT32(ustat, stellaris_adc_state),
VMSTATE_UINT32(sspri, stellaris_adc_state),
VMSTATE_UINT32(sac, stellaris_adc_state),
VMSTATE_UINT32(fifo[0].state, stellaris_adc_state),
VMSTATE_UINT32_ARRAY(fifo[0].data, stellaris_adc_state, 16),
VMSTATE_UINT32(ssmux[0], stellaris_adc_state),
VMSTATE_UINT32(ssctl[0], stellaris_adc_state),
VMSTATE_UINT32(fifo[1].state, stellaris_adc_state),
VMSTATE_UINT32_ARRAY(fifo[1].data, stellaris_adc_state, 16),
VMSTATE_UINT32(ssmux[1], stellaris_adc_state),
VMSTATE_UINT32(ssctl[1], stellaris_adc_state),
VMSTATE_UINT32(fifo[2].state, stellaris_adc_state),
VMSTATE_UINT32_ARRAY(fifo[2].data, stellaris_adc_state, 16),
VMSTATE_UINT32(ssmux[2], stellaris_adc_state),
VMSTATE_UINT32(ssctl[2], stellaris_adc_state),
VMSTATE_UINT32(fifo[3].state, stellaris_adc_state),
VMSTATE_UINT32_ARRAY(fifo[3].data, stellaris_adc_state, 16),
VMSTATE_UINT32(ssmux[3], stellaris_adc_state),
VMSTATE_UINT32(ssctl[3], stellaris_adc_state),
VMSTATE_UINT32(noise, stellaris_adc_state),
VMSTATE_END_OF_LIST()
}
};
static int stellaris_adc_init(SysBusDevice *sbd)
{
DeviceState *dev = DEVICE(sbd);
stellaris_adc_state *s = STELLARIS_ADC(dev);
int n;
for (n = 0; n < 4; n++) {
sysbus_init_irq(sbd, &s->irq[n]);
}
memory_region_init_io(&s->iomem, OBJECT(s), &stellaris_adc_ops, s,
"adc", 0x1000);
sysbus_init_mmio(sbd, &s->iomem);
stellaris_adc_reset(s);
qdev_init_gpio_in(dev, stellaris_adc_trigger, 1);
vmstate_register(dev, -1, &vmstate_stellaris_adc, s);
return 0;
}
static
void do_sys_reset(void *opaque, int n, int level)
{
if (level) {
qemu_system_reset_request();
}
}
/* Board init. */
static stellaris_board_info stellaris_boards[] = {
{ "LM3S811EVB",
0,
0x0032000e,
0x001f001f, /* dc0 */
0x001132bf,
0x01071013,
0x3f0f01ff,
0x0000001f,
BP_OLED_I2C
},
{ "LM3S6965EVB",
0x10010002,
0x1073402e,
0x00ff007f, /* dc0 */
0x001133ff,
0x030f5317,
0x0f0f87ff,
0x5000007f,
BP_OLED_SSI | BP_GAMEPAD
}
};
static void stellaris_init(const char *kernel_filename, const char *cpu_model,
stellaris_board_info *board)
{
static const int uart_irq[] = {5, 6, 33, 34};
static const int timer_irq[] = {19, 21, 23, 35};
static const uint32_t gpio_addr[7] =
{ 0x40004000, 0x40005000, 0x40006000, 0x40007000,
0x40024000, 0x40025000, 0x40026000};
static const int gpio_irq[7] = {0, 1, 2, 3, 4, 30, 31};
DeviceState *gpio_dev[7], *nvic;
qemu_irq gpio_in[7][8];
qemu_irq gpio_out[7][8];
qemu_irq adc;
int sram_size;
int flash_size;
I2CBus *i2c;
DeviceState *dev;
int i;
int j;
MemoryRegion *sram = g_new(MemoryRegion, 1);
MemoryRegion *flash = g_new(MemoryRegion, 1);
MemoryRegion *system_memory = get_system_memory();
flash_size = (((board->dc0 & 0xffff) + 1) << 1) * 1024;
sram_size = ((board->dc0 >> 18) + 1) * 1024;
/* Flash programming is done via the SCU, so pretend it is ROM. */
memory_region_init_ram(flash, NULL, "stellaris.flash", flash_size,
&error_fatal);
vmstate_register_ram_global(flash);
memory_region_set_readonly(flash, true);
memory_region_add_subregion(system_memory, 0, flash);
memory_region_init_ram(sram, NULL, "stellaris.sram", sram_size,
&error_fatal);
vmstate_register_ram_global(sram);
memory_region_add_subregion(system_memory, 0x20000000, sram);
nvic = armv7m_init(system_memory, flash_size, NUM_IRQ_LINES,
kernel_filename, cpu_model);
qdev_connect_gpio_out_named(nvic, "SYSRESETREQ", 0,
qemu_allocate_irq(&do_sys_reset, NULL, 0));
if (board->dc1 & (1 << 16)) {
dev = sysbus_create_varargs(TYPE_STELLARIS_ADC, 0x40038000,
qdev_get_gpio_in(nvic, 14),
qdev_get_gpio_in(nvic, 15),
qdev_get_gpio_in(nvic, 16),
qdev_get_gpio_in(nvic, 17),
NULL);
adc = qdev_get_gpio_in(dev, 0);
} else {
adc = NULL;
}
for (i = 0; i < 4; i++) {
if (board->dc2 & (0x10000 << i)) {
dev = sysbus_create_simple(TYPE_STELLARIS_GPTM,
0x40030000 + i * 0x1000,
qdev_get_gpio_in(nvic, timer_irq[i]));
/* TODO: This is incorrect, but we get away with it because
the ADC output is only ever pulsed. */
qdev_connect_gpio_out(dev, 0, adc);
}
}
stellaris_sys_init(0x400fe000, qdev_get_gpio_in(nvic, 28),
board, nd_table[0].macaddr.a);
for (i = 0; i < 7; i++) {
if (board->dc4 & (1 << i)) {
gpio_dev[i] = sysbus_create_simple("pl061_luminary", gpio_addr[i],
qdev_get_gpio_in(nvic,
gpio_irq[i]));
for (j = 0; j < 8; j++) {
gpio_in[i][j] = qdev_get_gpio_in(gpio_dev[i], j);
gpio_out[i][j] = NULL;
}
}
}
if (board->dc2 & (1 << 12)) {
dev = sysbus_create_simple(TYPE_STELLARIS_I2C, 0x40020000,
qdev_get_gpio_in(nvic, 8));
i2c = (I2CBus *)qdev_get_child_bus(dev, "i2c");
if (board->peripherals & BP_OLED_I2C) {
i2c_create_slave(i2c, "ssd0303", 0x3d);
}
}
for (i = 0; i < 4; i++) {
if (board->dc2 & (1 << i)) {
sysbus_create_simple("pl011_luminary", 0x4000c000 + i * 0x1000,
qdev_get_gpio_in(nvic, uart_irq[i]));
}
}
if (board->dc2 & (1 << 4)) {
dev = sysbus_create_simple("pl022", 0x40008000,
qdev_get_gpio_in(nvic, 7));
if (board->peripherals & BP_OLED_SSI) {
void *bus;
DeviceState *sddev;
DeviceState *ssddev;
/* Some boards have both an OLED controller and SD card connected to
* the same SSI port, with the SD card chip select connected to a
* GPIO pin. Technically the OLED chip select is connected to the
* SSI Fss pin. We do not bother emulating that as both devices
* should never be selected simultaneously, and our OLED controller
* ignores stray 0xff commands that occur when deselecting the SD
* card.
*/
bus = qdev_get_child_bus(dev, "ssi");
sddev = ssi_create_slave(bus, "ssi-sd");
ssddev = ssi_create_slave(bus, "ssd0323");
gpio_out[GPIO_D][0] = qemu_irq_split(
qdev_get_gpio_in_named(sddev, SSI_GPIO_CS, 0),
qdev_get_gpio_in_named(ssddev, SSI_GPIO_CS, 0));
gpio_out[GPIO_C][7] = qdev_get_gpio_in(ssddev, 0);
/* Make sure the select pin is high. */
qemu_irq_raise(gpio_out[GPIO_D][0]);
}
}
if (board->dc4 & (1 << 28)) {
DeviceState *enet;
qemu_check_nic_model(&nd_table[0], "stellaris");
enet = qdev_create(NULL, "stellaris_enet");
qdev_set_nic_properties(enet, &nd_table[0]);
qdev_init_nofail(enet);
sysbus_mmio_map(SYS_BUS_DEVICE(enet), 0, 0x40048000);
sysbus_connect_irq(SYS_BUS_DEVICE(enet), 0, qdev_get_gpio_in(nvic, 42));
}
if (board->peripherals & BP_GAMEPAD) {
qemu_irq gpad_irq[5];
static const int gpad_keycode[5] = { 0xc8, 0xd0, 0xcb, 0xcd, 0x1d };
gpad_irq[0] = qemu_irq_invert(gpio_in[GPIO_E][0]); /* up */
gpad_irq[1] = qemu_irq_invert(gpio_in[GPIO_E][1]); /* down */
gpad_irq[2] = qemu_irq_invert(gpio_in[GPIO_E][2]); /* left */
gpad_irq[3] = qemu_irq_invert(gpio_in[GPIO_E][3]); /* right */
gpad_irq[4] = qemu_irq_invert(gpio_in[GPIO_F][1]); /* select */
stellaris_gamepad_init(5, gpad_irq, gpad_keycode);
}
for (i = 0; i < 7; i++) {
if (board->dc4 & (1 << i)) {
for (j = 0; j < 8; j++) {
if (gpio_out[i][j]) {
qdev_connect_gpio_out(gpio_dev[i], j, gpio_out[i][j]);
}
}
}
}
}
/* FIXME: Figure out how to generate these from stellaris_boards. */
static void lm3s811evb_init(MachineState *machine)
{
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
stellaris_init(kernel_filename, cpu_model, &stellaris_boards[0]);
}
static void lm3s6965evb_init(MachineState *machine)
{
const char *cpu_model = machine->cpu_model;
const char *kernel_filename = machine->kernel_filename;
stellaris_init(kernel_filename, cpu_model, &stellaris_boards[1]);
}
static void lm3s811evb_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Stellaris LM3S811EVB";
mc->init = lm3s811evb_init;
}
static const TypeInfo lm3s811evb_type = {
.name = MACHINE_TYPE_NAME("lm3s811evb"),
.parent = TYPE_MACHINE,
.class_init = lm3s811evb_class_init,
};
static void lm3s6965evb_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
mc->desc = "Stellaris LM3S6965EVB";
mc->init = lm3s6965evb_init;
}
static const TypeInfo lm3s6965evb_type = {
.name = MACHINE_TYPE_NAME("lm3s6965evb"),
.parent = TYPE_MACHINE,
.class_init = lm3s6965evb_class_init,
};
static void stellaris_machine_init(void)
{
type_register_static(&lm3s811evb_type);
type_register_static(&lm3s6965evb_type);
}
machine_init(stellaris_machine_init)
static void stellaris_i2c_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
sdc->init = stellaris_i2c_init;
}
static const TypeInfo stellaris_i2c_info = {
.name = TYPE_STELLARIS_I2C,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(stellaris_i2c_state),
.class_init = stellaris_i2c_class_init,
};
static void stellaris_gptm_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
sdc->init = stellaris_gptm_init;
}
static const TypeInfo stellaris_gptm_info = {
.name = TYPE_STELLARIS_GPTM,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(gptm_state),
.class_init = stellaris_gptm_class_init,
};
static void stellaris_adc_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
sdc->init = stellaris_adc_init;
}
static const TypeInfo stellaris_adc_info = {
.name = TYPE_STELLARIS_ADC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(stellaris_adc_state),
.class_init = stellaris_adc_class_init,
};
static void stellaris_register_types(void)
{
type_register_static(&stellaris_i2c_info);
type_register_static(&stellaris_gptm_info);
type_register_static(&stellaris_adc_info);
}
type_init(stellaris_register_types)
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