/* * Luminary Micro Stellaris peripherals * * Copyright (c) 2006 CodeSourcery. * Written by Paul Brook * * This code is licensed under the GPL. */ #include "hw/sysbus.h" #include "hw/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" #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 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) { qemu_del_timer(s->timer[n]); } static void gptm_reload(gptm_state *s, int n, int reset) { int64_t tick; if (reset) tick = qemu_get_clock_ns(vm_clock); 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; qemu_mod_timer(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->control == 1) return s->rtc; case 0x4c: /* TBR */ hw_error("TODO: Timer value read\n"); default: hw_error("gptm_read: 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, .minimum_version_id_old = 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_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] = qemu_new_timer_ns(vm_clock, gptm_tick, &s->opaque[0]); s->timer[1] = qemu_new_timer_ns(vm_clock, 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, .minimum_version_id_old = 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 = (ssys_state *)g_malloc0(sizeof(ssys_state)); 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. */ typedef struct { SysBusDevice busdev; i2c_bus *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, .minimum_version_id_old = 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 * dev) { stellaris_i2c_state *s = FROM_SYSBUS(stellaris_i2c_state, dev); i2c_bus *bus; sysbus_init_irq(dev, &s->irq); bus = i2c_init_bus(&dev->qdev, "i2c"); s->bus = bus; memory_region_init_io(&s->iomem, OBJECT(s), &stellaris_i2c_ops, s, "i2c", 0x1000); sysbus_init_mmio(dev, &s->iomem); /* ??? For now we only implement the master interface. */ stellaris_i2c_reset(s); vmstate_register(&dev->qdev, -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 typedef struct { SysBusDevice busdev; 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, .minimum_version_id_old = 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 *dev) { stellaris_adc_state *s = FROM_SYSBUS(stellaris_adc_state, dev); int n; for (n = 0; n < 4; n++) { sysbus_init_irq(dev, &s->irq[n]); } memory_region_init_io(&s->iomem, OBJECT(s), &stellaris_adc_ops, s, "adc", 0x1000); sysbus_init_mmio(dev, &s->iomem); stellaris_adc_reset(s); qdev_init_gpio_in(&dev->qdev, stellaris_adc_trigger, 1); vmstate_register(&dev->qdev, -1, &vmstate_stellaris_adc, s); return 0; } /* 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}; MemoryRegion *address_space_mem = get_system_memory(); qemu_irq *pic; DeviceState *gpio_dev[7]; qemu_irq gpio_in[7][8]; qemu_irq gpio_out[7][8]; qemu_irq adc; int sram_size; int flash_size; i2c_bus *i2c; DeviceState *dev; int i; int j; flash_size = ((board->dc0 & 0xffff) + 1) << 1; sram_size = (board->dc0 >> 18) + 1; pic = armv7m_init(address_space_mem, flash_size, sram_size, kernel_filename, cpu_model); if (board->dc1 & (1 << 16)) { dev = sysbus_create_varargs("stellaris-adc", 0x40038000, pic[14], pic[15], pic[16], pic[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, pic[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, pic[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], pic[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("stellaris-i2c", 0x40020000, pic[8]); i2c = (i2c_bus *)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, pic[uart_irq[i]]); } } if (board->dc2 & (1 << 4)) { dev = sysbus_create_simple("pl022", 0x40008000, pic[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(sddev, 0), qdev_get_gpio_in(ssddev, 0)); gpio_out[GPIO_C][7] = qdev_get_gpio_in(ssddev, 1); /* 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, pic[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(QEMUMachineInitArgs *args) { const char *cpu_model = args->cpu_model; const char *kernel_filename = args->kernel_filename; stellaris_init(kernel_filename, cpu_model, &stellaris_boards[0]); } static void lm3s6965evb_init(QEMUMachineInitArgs *args) { const char *cpu_model = args->cpu_model; const char *kernel_filename = args->kernel_filename; stellaris_init(kernel_filename, cpu_model, &stellaris_boards[1]); } static QEMUMachine lm3s811evb_machine = { .name = "lm3s811evb", .desc = "Stellaris LM3S811EVB", .init = lm3s811evb_init, DEFAULT_MACHINE_OPTIONS, }; static QEMUMachine lm3s6965evb_machine = { .name = "lm3s6965evb", .desc = "Stellaris LM3S6965EVB", .init = lm3s6965evb_init, DEFAULT_MACHINE_OPTIONS, }; static void stellaris_machine_init(void) { qemu_register_machine(&lm3s811evb_machine); qemu_register_machine(&lm3s6965evb_machine); } 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 = "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 = "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)