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/*
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* Luminary Micro Stellaris preipherals
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*
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* Copyright (c) 2006 CodeSourcery.
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* Written by Paul Brook
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*
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* This code is licenced under the GPL.
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*/
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#include "hw.h" |
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#include "arm-misc.h" |
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#include "primecell.h" |
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#include "devices.h" |
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#include "qemu-timer.h" |
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#include "i2c.h" |
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#include "net.h" |
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#include "sd.h" |
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#include "sysemu.h" |
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#include "boards.h" |
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|
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#define GPIO_A 0 |
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#define GPIO_B 1 |
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#define GPIO_C 2 |
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#define GPIO_D 3 |
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#define GPIO_E 4 |
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#define GPIO_F 5 |
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#define GPIO_G 6 |
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|
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#define BP_OLED_I2C 0x01 |
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#define BP_OLED_SSI 0x02 |
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#define BP_GAMEPAD 0x04 |
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|
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typedef const struct { |
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const char *name; |
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uint32_t did0; |
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uint32_t did1; |
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uint32_t dc0; |
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uint32_t dc1; |
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uint32_t dc2; |
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uint32_t dc3; |
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uint32_t dc4; |
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uint32_t peripherals; |
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} stellaris_board_info; |
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|
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/* General purpose timer module. */
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typedef struct gptm_state { |
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uint32_t config; |
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uint32_t mode[2];
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uint32_t control; |
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uint32_t state; |
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uint32_t mask; |
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uint32_t load[2];
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uint32_t match[2];
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uint32_t prescale[2];
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uint32_t match_prescale[2];
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uint32_t rtc; |
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int64_t tick[2];
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struct gptm_state *opaque[2]; |
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uint32_t base; |
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QEMUTimer *timer[2];
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/* The timers have an alternate output used to trigger the ADC. */
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qemu_irq trigger; |
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qemu_irq irq; |
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} gptm_state; |
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static void gptm_update_irq(gptm_state *s) |
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{ |
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int level;
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level = (s->state & s->mask) != 0;
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qemu_set_irq(s->irq, level); |
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} |
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static void gptm_stop(gptm_state *s, int n) |
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{ |
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qemu_del_timer(s->timer[n]); |
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} |
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static void gptm_reload(gptm_state *s, int n, int reset) |
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{ |
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int64_t tick; |
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if (reset)
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tick = qemu_get_clock(vm_clock); |
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else
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tick = s->tick[n]; |
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if (s->config == 0) { |
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/* 32-bit CountDown. */
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uint32_t count; |
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count = s->load[0] | (s->load[1] << 16); |
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tick += (int64_t)count * system_clock_scale; |
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} else if (s->config == 1) { |
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/* 32-bit RTC. 1Hz tick. */
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tick += ticks_per_sec; |
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} else if (s->mode[n] == 0xa) { |
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/* PWM mode. Not implemented. */
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} else {
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cpu_abort(cpu_single_env, "TODO: 16-bit timer mode 0x%x\n",
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s->mode[n]); |
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} |
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s->tick[n] = tick; |
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qemu_mod_timer(s->timer[n], tick); |
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} |
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|
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static void gptm_tick(void *opaque) |
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{ |
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gptm_state **p = (gptm_state **)opaque; |
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gptm_state *s; |
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int n;
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s = *p; |
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n = p - s->opaque; |
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if (s->config == 0) { |
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s->state |= 1;
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if ((s->control & 0x20)) { |
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/* Output trigger. */
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qemu_irq_raise(s->trigger); |
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qemu_irq_lower(s->trigger); |
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} |
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if (s->mode[0] & 1) { |
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/* One-shot. */
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s->control &= ~1;
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} else {
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/* Periodic. */
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gptm_reload(s, 0, 0); |
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} |
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} else if (s->config == 1) { |
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/* RTC. */
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uint32_t match; |
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s->rtc++; |
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match = s->match[0] | (s->match[1] << 16); |
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if (s->rtc > match)
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s->rtc = 0;
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if (s->rtc == 0) { |
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s->state |= 8;
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} |
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gptm_reload(s, 0, 0); |
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} else if (s->mode[n] == 0xa) { |
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/* PWM mode. Not implemented. */
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} else {
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cpu_abort(cpu_single_env, "TODO: 16-bit timer mode 0x%x\n",
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s->mode[n]); |
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} |
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gptm_update_irq(s); |
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} |
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static uint32_t gptm_read(void *opaque, target_phys_addr_t offset) |
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{ |
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gptm_state *s = (gptm_state *)opaque; |
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offset -= s->base; |
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switch (offset) {
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case 0x00: /* CFG */ |
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return s->config;
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case 0x04: /* TAMR */ |
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return s->mode[0]; |
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case 0x08: /* TBMR */ |
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return s->mode[1]; |
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case 0x0c: /* CTL */ |
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return s->control;
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case 0x18: /* IMR */ |
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return s->mask;
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case 0x1c: /* RIS */ |
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return s->state;
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case 0x20: /* MIS */ |
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return s->state & s->mask;
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case 0x24: /* CR */ |
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return 0; |
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case 0x28: /* TAILR */ |
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return s->load[0] | ((s->config < 4) ? (s->load[1] << 16) : 0); |
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case 0x2c: /* TBILR */ |
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return s->load[1]; |
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case 0x30: /* TAMARCHR */ |
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return s->match[0] | ((s->config < 4) ? (s->match[1] << 16) : 0); |
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case 0x34: /* TBMATCHR */ |
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return s->match[1]; |
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case 0x38: /* TAPR */ |
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return s->prescale[0]; |
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case 0x3c: /* TBPR */ |
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return s->prescale[1]; |
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case 0x40: /* TAPMR */ |
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return s->match_prescale[0]; |
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case 0x44: /* TBPMR */ |
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return s->match_prescale[1]; |
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case 0x48: /* TAR */ |
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if (s->control == 1) |
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return s->rtc;
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case 0x4c: /* TBR */ |
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cpu_abort(cpu_single_env, "TODO: Timer value read\n");
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default:
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cpu_abort(cpu_single_env, "gptm_read: Bad offset 0x%x\n", (int)offset); |
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return 0; |
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} |
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} |
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static void gptm_write(void *opaque, target_phys_addr_t offset, uint32_t value) |
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{ |
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gptm_state *s = (gptm_state *)opaque; |
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uint32_t oldval; |
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offset -= s->base; |
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/* The timers should be disabled before changing the configuration.
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We take advantage of this and defer everything until the timer
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is enabled. */
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switch (offset) {
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case 0x00: /* CFG */ |
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s->config = value; |
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break;
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case 0x04: /* TAMR */ |
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s->mode[0] = value;
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break;
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case 0x08: /* TBMR */ |
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s->mode[1] = value;
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break;
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case 0x0c: /* CTL */ |
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oldval = s->control; |
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s->control = value; |
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/* TODO: Implement pause. */
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if ((oldval ^ value) & 1) { |
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if (value & 1) { |
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gptm_reload(s, 0, 1); |
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} else {
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gptm_stop(s, 0);
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} |
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} |
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if (((oldval ^ value) & 0x100) && s->config >= 4) { |
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if (value & 0x100) { |
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gptm_reload(s, 1, 1); |
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} else {
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gptm_stop(s, 1);
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} |
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} |
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break;
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case 0x18: /* IMR */ |
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s->mask = value & 0x77;
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gptm_update_irq(s); |
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break;
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case 0x24: /* CR */ |
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s->state &= ~value; |
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break;
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case 0x28: /* TAILR */ |
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s->load[0] = value & 0xffff; |
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if (s->config < 4) { |
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s->load[1] = value >> 16; |
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} |
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break;
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case 0x2c: /* TBILR */ |
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s->load[1] = value & 0xffff; |
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break;
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case 0x30: /* TAMARCHR */ |
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s->match[0] = value & 0xffff; |
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if (s->config < 4) { |
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s->match[1] = value >> 16; |
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} |
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break;
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case 0x34: /* TBMATCHR */ |
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s->match[1] = value >> 16; |
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break;
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case 0x38: /* TAPR */ |
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s->prescale[0] = value;
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break;
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case 0x3c: /* TBPR */ |
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s->prescale[1] = value;
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break;
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case 0x40: /* TAPMR */ |
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s->match_prescale[0] = value;
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break;
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case 0x44: /* TBPMR */ |
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s->match_prescale[0] = value;
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break;
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default:
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cpu_abort(cpu_single_env, "gptm_write: Bad offset 0x%x\n", (int)offset); |
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} |
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gptm_update_irq(s); |
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} |
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|
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static CPUReadMemoryFunc *gptm_readfn[] = {
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gptm_read, |
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gptm_read, |
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gptm_read |
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}; |
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|
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static CPUWriteMemoryFunc *gptm_writefn[] = {
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gptm_write, |
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gptm_write, |
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gptm_write |
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}; |
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|
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static void stellaris_gptm_init(uint32_t base, qemu_irq irq, qemu_irq trigger) |
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{ |
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int iomemtype;
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gptm_state *s; |
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s = (gptm_state *)qemu_mallocz(sizeof(gptm_state));
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s->base = base; |
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s->irq = irq; |
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s->trigger = trigger; |
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s->opaque[0] = s->opaque[1] = s; |
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iomemtype = cpu_register_io_memory(0, gptm_readfn,
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gptm_writefn, s); |
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cpu_register_physical_memory(base, 0x00001000, iomemtype);
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s->timer[0] = qemu_new_timer(vm_clock, gptm_tick, &s->opaque[0]); |
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s->timer[1] = qemu_new_timer(vm_clock, gptm_tick, &s->opaque[1]); |
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/* ??? Save/restore. */
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} |
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|
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|
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/* System controller. */
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|
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typedef struct { |
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uint32_t base; |
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uint32_t pborctl; |
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uint32_t ldopctl; |
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uint32_t int_status; |
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uint32_t int_mask; |
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uint32_t resc; |
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uint32_t rcc; |
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uint32_t rcgc[3];
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uint32_t scgc[3];
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uint32_t dcgc[3];
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uint32_t clkvclr; |
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uint32_t ldoarst; |
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uint32_t user0; |
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uint32_t user1; |
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qemu_irq irq; |
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stellaris_board_info *board; |
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} ssys_state; |
329 |
|
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static void ssys_update(ssys_state *s) |
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{ |
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qemu_set_irq(s->irq, (s->int_status & s->int_mask) != 0);
|
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} |
334 |
|
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static uint32_t pllcfg_sandstorm[16] = { |
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0x31c0, /* 1 Mhz */ |
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0x1ae0, /* 1.8432 Mhz */ |
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0x18c0, /* 2 Mhz */ |
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0xd573, /* 2.4576 Mhz */ |
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0x37a6, /* 3.57954 Mhz */ |
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0x1ae2, /* 3.6864 Mhz */ |
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0x0c40, /* 4 Mhz */ |
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0x98bc, /* 4.906 Mhz */ |
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0x935b, /* 4.9152 Mhz */ |
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0x09c0, /* 5 Mhz */ |
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0x4dee, /* 5.12 Mhz */ |
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0x0c41, /* 6 Mhz */ |
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0x75db, /* 6.144 Mhz */ |
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0x1ae6, /* 7.3728 Mhz */ |
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0x0600, /* 8 Mhz */ |
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0x585b /* 8.192 Mhz */ |
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}; |
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|
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static uint32_t pllcfg_fury[16] = { |
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0x3200, /* 1 Mhz */ |
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0x1b20, /* 1.8432 Mhz */ |
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0x1900, /* 2 Mhz */ |
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0xf42b, /* 2.4576 Mhz */ |
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0x37e3, /* 3.57954 Mhz */ |
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0x1b21, /* 3.6864 Mhz */ |
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0x0c80, /* 4 Mhz */ |
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0x98ee, /* 4.906 Mhz */ |
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0xd5b4, /* 4.9152 Mhz */ |
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0x0a00, /* 5 Mhz */ |
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0x4e27, /* 5.12 Mhz */ |
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0x1902, /* 6 Mhz */ |
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0xec1c, /* 6.144 Mhz */ |
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0x1b23, /* 7.3728 Mhz */ |
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0x0640, /* 8 Mhz */ |
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0xb11c /* 8.192 Mhz */ |
371 |
}; |
372 |
|
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static uint32_t ssys_read(void *opaque, target_phys_addr_t offset) |
374 |
{ |
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ssys_state *s = (ssys_state *)opaque; |
376 |
|
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offset -= s->base; |
378 |
switch (offset) {
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379 |
case 0x000: /* DID0 */ |
380 |
return s->board->did0;
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381 |
case 0x004: /* DID1 */ |
382 |
return s->board->did1;
|
383 |
case 0x008: /* DC0 */ |
384 |
return s->board->dc0;
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385 |
case 0x010: /* DC1 */ |
386 |
return s->board->dc1;
|
387 |
case 0x014: /* DC2 */ |
388 |
return s->board->dc2;
|
389 |
case 0x018: /* DC3 */ |
390 |
return s->board->dc3;
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391 |
case 0x01c: /* DC4 */ |
392 |
return s->board->dc4;
|
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case 0x030: /* PBORCTL */ |
394 |
return s->pborctl;
|
395 |
case 0x034: /* LDOPCTL */ |
396 |
return s->ldopctl;
|
397 |
case 0x040: /* SRCR0 */ |
398 |
return 0; |
399 |
case 0x044: /* SRCR1 */ |
400 |
return 0; |
401 |
case 0x048: /* SRCR2 */ |
402 |
return 0; |
403 |
case 0x050: /* RIS */ |
404 |
return s->int_status;
|
405 |
case 0x054: /* IMC */ |
406 |
return s->int_mask;
|
407 |
case 0x058: /* MISC */ |
408 |
return s->int_status & s->int_mask;
|
409 |
case 0x05c: /* RESC */ |
410 |
return s->resc;
|
411 |
case 0x060: /* RCC */ |
412 |
return s->rcc;
|
413 |
case 0x064: /* PLLCFG */ |
414 |
{ |
415 |
int xtal;
|
416 |
xtal = (s->rcc >> 6) & 0xf; |
417 |
if (s->board->did0 & (1 << 16)) { |
418 |
return pllcfg_fury[xtal];
|
419 |
} else {
|
420 |
return pllcfg_sandstorm[xtal];
|
421 |
} |
422 |
} |
423 |
case 0x100: /* RCGC0 */ |
424 |
return s->rcgc[0]; |
425 |
case 0x104: /* RCGC1 */ |
426 |
return s->rcgc[1]; |
427 |
case 0x108: /* RCGC2 */ |
428 |
return s->rcgc[2]; |
429 |
case 0x110: /* SCGC0 */ |
430 |
return s->scgc[0]; |
431 |
case 0x114: /* SCGC1 */ |
432 |
return s->scgc[1]; |
433 |
case 0x118: /* SCGC2 */ |
434 |
return s->scgc[2]; |
435 |
case 0x120: /* DCGC0 */ |
436 |
return s->dcgc[0]; |
437 |
case 0x124: /* DCGC1 */ |
438 |
return s->dcgc[1]; |
439 |
case 0x128: /* DCGC2 */ |
440 |
return s->dcgc[2]; |
441 |
case 0x150: /* CLKVCLR */ |
442 |
return s->clkvclr;
|
443 |
case 0x160: /* LDOARST */ |
444 |
return s->ldoarst;
|
445 |
case 0x1e0: /* USER0 */ |
446 |
return s->user0;
|
447 |
case 0x1e4: /* USER1 */ |
448 |
return s->user1;
|
449 |
default:
|
450 |
cpu_abort(cpu_single_env, "ssys_read: Bad offset 0x%x\n", (int)offset); |
451 |
return 0; |
452 |
} |
453 |
} |
454 |
|
455 |
static void ssys_write(void *opaque, target_phys_addr_t offset, uint32_t value) |
456 |
{ |
457 |
ssys_state *s = (ssys_state *)opaque; |
458 |
|
459 |
offset -= s->base; |
460 |
switch (offset) {
|
461 |
case 0x030: /* PBORCTL */ |
462 |
s->pborctl = value & 0xffff;
|
463 |
break;
|
464 |
case 0x034: /* LDOPCTL */ |
465 |
s->ldopctl = value & 0x1f;
|
466 |
break;
|
467 |
case 0x040: /* SRCR0 */ |
468 |
case 0x044: /* SRCR1 */ |
469 |
case 0x048: /* SRCR2 */ |
470 |
fprintf(stderr, "Peripheral reset not implemented\n");
|
471 |
break;
|
472 |
case 0x054: /* IMC */ |
473 |
s->int_mask = value & 0x7f;
|
474 |
break;
|
475 |
case 0x058: /* MISC */ |
476 |
s->int_status &= ~value; |
477 |
break;
|
478 |
case 0x05c: /* RESC */ |
479 |
s->resc = value & 0x3f;
|
480 |
break;
|
481 |
case 0x060: /* RCC */ |
482 |
if ((s->rcc & (1 << 13)) != 0 && (value & (1 << 13)) == 0) { |
483 |
/* PLL enable. */
|
484 |
s->int_status |= (1 << 6); |
485 |
} |
486 |
s->rcc = value; |
487 |
system_clock_scale = 5 * (((s->rcc >> 23) & 0xf) + 1); |
488 |
break;
|
489 |
case 0x100: /* RCGC0 */ |
490 |
s->rcgc[0] = value;
|
491 |
break;
|
492 |
case 0x104: /* RCGC1 */ |
493 |
s->rcgc[1] = value;
|
494 |
break;
|
495 |
case 0x108: /* RCGC2 */ |
496 |
s->rcgc[2] = value;
|
497 |
break;
|
498 |
case 0x110: /* SCGC0 */ |
499 |
s->scgc[0] = value;
|
500 |
break;
|
501 |
case 0x114: /* SCGC1 */ |
502 |
s->scgc[1] = value;
|
503 |
break;
|
504 |
case 0x118: /* SCGC2 */ |
505 |
s->scgc[2] = value;
|
506 |
break;
|
507 |
case 0x120: /* DCGC0 */ |
508 |
s->dcgc[0] = value;
|
509 |
break;
|
510 |
case 0x124: /* DCGC1 */ |
511 |
s->dcgc[1] = value;
|
512 |
break;
|
513 |
case 0x128: /* DCGC2 */ |
514 |
s->dcgc[2] = value;
|
515 |
break;
|
516 |
case 0x150: /* CLKVCLR */ |
517 |
s->clkvclr = value; |
518 |
break;
|
519 |
case 0x160: /* LDOARST */ |
520 |
s->ldoarst = value; |
521 |
break;
|
522 |
default:
|
523 |
cpu_abort(cpu_single_env, "ssys_write: Bad offset 0x%x\n", (int)offset); |
524 |
} |
525 |
ssys_update(s); |
526 |
} |
527 |
|
528 |
static CPUReadMemoryFunc *ssys_readfn[] = {
|
529 |
ssys_read, |
530 |
ssys_read, |
531 |
ssys_read |
532 |
}; |
533 |
|
534 |
static CPUWriteMemoryFunc *ssys_writefn[] = {
|
535 |
ssys_write, |
536 |
ssys_write, |
537 |
ssys_write |
538 |
}; |
539 |
|
540 |
static void ssys_reset(void *opaque) |
541 |
{ |
542 |
ssys_state *s = (ssys_state *)opaque; |
543 |
|
544 |
s->pborctl = 0x7ffd;
|
545 |
s->rcc = 0x078e3ac0;
|
546 |
s->rcgc[0] = 1; |
547 |
s->scgc[0] = 1; |
548 |
s->dcgc[0] = 1; |
549 |
} |
550 |
|
551 |
static void stellaris_sys_init(uint32_t base, qemu_irq irq, |
552 |
stellaris_board_info * board, |
553 |
uint8_t *macaddr) |
554 |
{ |
555 |
int iomemtype;
|
556 |
ssys_state *s; |
557 |
|
558 |
s = (ssys_state *)qemu_mallocz(sizeof(ssys_state));
|
559 |
s->base = base; |
560 |
s->irq = irq; |
561 |
s->board = board; |
562 |
/* Most devices come preprogrammed with a MAC address in the user data. */
|
563 |
s->user0 = macaddr[0] | (macaddr[1] << 8) | (macaddr[2] << 16); |
564 |
s->user1 = macaddr[3] | (macaddr[4] << 8) | (macaddr[5] << 16); |
565 |
|
566 |
iomemtype = cpu_register_io_memory(0, ssys_readfn,
|
567 |
ssys_writefn, s); |
568 |
cpu_register_physical_memory(base, 0x00001000, iomemtype);
|
569 |
ssys_reset(s); |
570 |
/* ??? Save/restore. */
|
571 |
} |
572 |
|
573 |
|
574 |
/* I2C controller. */
|
575 |
|
576 |
typedef struct { |
577 |
i2c_bus *bus; |
578 |
qemu_irq irq; |
579 |
uint32_t base; |
580 |
uint32_t msa; |
581 |
uint32_t mcs; |
582 |
uint32_t mdr; |
583 |
uint32_t mtpr; |
584 |
uint32_t mimr; |
585 |
uint32_t mris; |
586 |
uint32_t mcr; |
587 |
} stellaris_i2c_state; |
588 |
|
589 |
#define STELLARIS_I2C_MCS_BUSY 0x01 |
590 |
#define STELLARIS_I2C_MCS_ERROR 0x02 |
591 |
#define STELLARIS_I2C_MCS_ADRACK 0x04 |
592 |
#define STELLARIS_I2C_MCS_DATACK 0x08 |
593 |
#define STELLARIS_I2C_MCS_ARBLST 0x10 |
594 |
#define STELLARIS_I2C_MCS_IDLE 0x20 |
595 |
#define STELLARIS_I2C_MCS_BUSBSY 0x40 |
596 |
|
597 |
static uint32_t stellaris_i2c_read(void *opaque, target_phys_addr_t offset) |
598 |
{ |
599 |
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque; |
600 |
|
601 |
offset -= s->base; |
602 |
switch (offset) {
|
603 |
case 0x00: /* MSA */ |
604 |
return s->msa;
|
605 |
case 0x04: /* MCS */ |
606 |
/* We don't emulate timing, so the controller is never busy. */
|
607 |
return s->mcs | STELLARIS_I2C_MCS_IDLE;
|
608 |
case 0x08: /* MDR */ |
609 |
return s->mdr;
|
610 |
case 0x0c: /* MTPR */ |
611 |
return s->mtpr;
|
612 |
case 0x10: /* MIMR */ |
613 |
return s->mimr;
|
614 |
case 0x14: /* MRIS */ |
615 |
return s->mris;
|
616 |
case 0x18: /* MMIS */ |
617 |
return s->mris & s->mimr;
|
618 |
case 0x20: /* MCR */ |
619 |
return s->mcr;
|
620 |
default:
|
621 |
cpu_abort(cpu_single_env, "strllaris_i2c_read: Bad offset 0x%x\n",
|
622 |
(int)offset);
|
623 |
return 0; |
624 |
} |
625 |
} |
626 |
|
627 |
static void stellaris_i2c_update(stellaris_i2c_state *s) |
628 |
{ |
629 |
int level;
|
630 |
|
631 |
level = (s->mris & s->mimr) != 0;
|
632 |
qemu_set_irq(s->irq, level); |
633 |
} |
634 |
|
635 |
static void stellaris_i2c_write(void *opaque, target_phys_addr_t offset, |
636 |
uint32_t value) |
637 |
{ |
638 |
stellaris_i2c_state *s = (stellaris_i2c_state *)opaque; |
639 |
|
640 |
offset -= s->base; |
641 |
switch (offset) {
|
642 |
case 0x00: /* MSA */ |
643 |
s->msa = value & 0xff;
|
644 |
break;
|
645 |
case 0x04: /* MCS */ |
646 |
if ((s->mcr & 0x10) == 0) { |
647 |
/* Disabled. Do nothing. */
|
648 |
break;
|
649 |
} |
650 |
/* Grab the bus if this is starting a transfer. */
|
651 |
if ((value & 2) && (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) { |
652 |
if (i2c_start_transfer(s->bus, s->msa >> 1, s->msa & 1)) { |
653 |
s->mcs |= STELLARIS_I2C_MCS_ARBLST; |
654 |
} else {
|
655 |
s->mcs &= ~STELLARIS_I2C_MCS_ARBLST; |
656 |
s->mcs |= STELLARIS_I2C_MCS_BUSBSY; |
657 |
} |
658 |
} |
659 |
/* If we don't have the bus then indicate an error. */
|
660 |
if (!i2c_bus_busy(s->bus)
|
661 |
|| (s->mcs & STELLARIS_I2C_MCS_BUSBSY) == 0) {
|
662 |
s->mcs |= STELLARIS_I2C_MCS_ERROR; |
663 |
break;
|
664 |
} |
665 |
s->mcs &= ~STELLARIS_I2C_MCS_ERROR; |
666 |
if (value & 1) { |
667 |
/* Transfer a byte. */
|
668 |
/* TODO: Handle errors. */
|
669 |
if (s->msa & 1) { |
670 |
/* Recv */
|
671 |
s->mdr = i2c_recv(s->bus) & 0xff;
|
672 |
} else {
|
673 |
/* Send */
|
674 |
i2c_send(s->bus, s->mdr); |
675 |
} |
676 |
/* Raise an interrupt. */
|
677 |
s->mris |= 1;
|
678 |
} |
679 |
if (value & 4) { |
680 |
/* Finish transfer. */
|
681 |
i2c_end_transfer(s->bus); |
682 |
s->mcs &= ~STELLARIS_I2C_MCS_BUSBSY; |
683 |
} |
684 |
break;
|
685 |
case 0x08: /* MDR */ |
686 |
s->mdr = value & 0xff;
|
687 |
break;
|
688 |
case 0x0c: /* MTPR */ |
689 |
s->mtpr = value & 0xff;
|
690 |
break;
|
691 |
case 0x10: /* MIMR */ |
692 |
s->mimr = 1;
|
693 |
break;
|
694 |
case 0x1c: /* MICR */ |
695 |
s->mris &= ~value; |
696 |
break;
|
697 |
case 0x20: /* MCR */ |
698 |
if (value & 1) |
699 |
cpu_abort(cpu_single_env, |
700 |
"stellaris_i2c_write: Loopback not implemented\n");
|
701 |
if (value & 0x20) |
702 |
cpu_abort(cpu_single_env, |
703 |
"stellaris_i2c_write: Slave mode not implemented\n");
|
704 |
s->mcr = value & 0x31;
|
705 |
break;
|
706 |
default:
|
707 |
cpu_abort(cpu_single_env, "stellaris_i2c_write: Bad offset 0x%x\n",
|
708 |
(int)offset);
|
709 |
} |
710 |
stellaris_i2c_update(s); |
711 |
} |
712 |
|
713 |
static void stellaris_i2c_reset(stellaris_i2c_state *s) |
714 |
{ |
715 |
if (s->mcs & STELLARIS_I2C_MCS_BUSBSY)
|
716 |
i2c_end_transfer(s->bus); |
717 |
|
718 |
s->msa = 0;
|
719 |
s->mcs = 0;
|
720 |
s->mdr = 0;
|
721 |
s->mtpr = 1;
|
722 |
s->mimr = 0;
|
723 |
s->mris = 0;
|
724 |
s->mcr = 0;
|
725 |
stellaris_i2c_update(s); |
726 |
} |
727 |
|
728 |
static CPUReadMemoryFunc *stellaris_i2c_readfn[] = {
|
729 |
stellaris_i2c_read, |
730 |
stellaris_i2c_read, |
731 |
stellaris_i2c_read |
732 |
}; |
733 |
|
734 |
static CPUWriteMemoryFunc *stellaris_i2c_writefn[] = {
|
735 |
stellaris_i2c_write, |
736 |
stellaris_i2c_write, |
737 |
stellaris_i2c_write |
738 |
}; |
739 |
|
740 |
static void stellaris_i2c_init(uint32_t base, qemu_irq irq, i2c_bus *bus) |
741 |
{ |
742 |
stellaris_i2c_state *s; |
743 |
int iomemtype;
|
744 |
|
745 |
s = (stellaris_i2c_state *)qemu_mallocz(sizeof(stellaris_i2c_state));
|
746 |
s->base = base; |
747 |
s->irq = irq; |
748 |
s->bus = bus; |
749 |
|
750 |
iomemtype = cpu_register_io_memory(0, stellaris_i2c_readfn,
|
751 |
stellaris_i2c_writefn, s); |
752 |
cpu_register_physical_memory(base, 0x00001000, iomemtype);
|
753 |
/* ??? For now we only implement the master interface. */
|
754 |
stellaris_i2c_reset(s); |
755 |
} |
756 |
|
757 |
/* Analogue to Digital Converter. This is only partially implemented,
|
758 |
enough for applications that use a combined ADC and timer tick. */
|
759 |
|
760 |
#define STELLARIS_ADC_EM_CONTROLLER 0 |
761 |
#define STELLARIS_ADC_EM_COMP 1 |
762 |
#define STELLARIS_ADC_EM_EXTERNAL 4 |
763 |
#define STELLARIS_ADC_EM_TIMER 5 |
764 |
#define STELLARIS_ADC_EM_PWM0 6 |
765 |
#define STELLARIS_ADC_EM_PWM1 7 |
766 |
#define STELLARIS_ADC_EM_PWM2 8 |
767 |
|
768 |
#define STELLARIS_ADC_FIFO_EMPTY 0x0100 |
769 |
#define STELLARIS_ADC_FIFO_FULL 0x1000 |
770 |
|
771 |
typedef struct |
772 |
{ |
773 |
uint32_t base; |
774 |
uint32_t actss; |
775 |
uint32_t ris; |
776 |
uint32_t im; |
777 |
uint32_t emux; |
778 |
uint32_t ostat; |
779 |
uint32_t ustat; |
780 |
uint32_t sspri; |
781 |
uint32_t sac; |
782 |
struct {
|
783 |
uint32_t state; |
784 |
uint32_t data[16];
|
785 |
} fifo[4];
|
786 |
uint32_t ssmux[4];
|
787 |
uint32_t ssctl[4];
|
788 |
qemu_irq irq; |
789 |
} stellaris_adc_state; |
790 |
|
791 |
static uint32_t stellaris_adc_fifo_read(stellaris_adc_state *s, int n) |
792 |
{ |
793 |
int tail;
|
794 |
|
795 |
tail = s->fifo[n].state & 0xf;
|
796 |
if (s->fifo[n].state & STELLARIS_ADC_FIFO_EMPTY) {
|
797 |
s->ustat |= 1 << n;
|
798 |
} else {
|
799 |
s->fifo[n].state = (s->fifo[n].state & ~0xf) | ((tail + 1) & 0xf); |
800 |
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_FULL; |
801 |
if (tail + 1 == ((s->fifo[n].state >> 4) & 0xf)) |
802 |
s->fifo[n].state |= STELLARIS_ADC_FIFO_EMPTY; |
803 |
} |
804 |
return s->fifo[n].data[tail];
|
805 |
} |
806 |
|
807 |
static void stellaris_adc_fifo_write(stellaris_adc_state *s, int n, |
808 |
uint32_t value) |
809 |
{ |
810 |
int head;
|
811 |
|
812 |
head = (s->fifo[n].state >> 4) & 0xf; |
813 |
if (s->fifo[n].state & STELLARIS_ADC_FIFO_FULL) {
|
814 |
s->ostat |= 1 << n;
|
815 |
return;
|
816 |
} |
817 |
s->fifo[n].data[head] = value; |
818 |
head = (head + 1) & 0xf; |
819 |
s->fifo[n].state &= ~STELLARIS_ADC_FIFO_EMPTY; |
820 |
s->fifo[n].state = (s->fifo[n].state & ~0xf0) | (head << 4); |
821 |
if ((s->fifo[n].state & 0xf) == head) |
822 |
s->fifo[n].state |= STELLARIS_ADC_FIFO_FULL; |
823 |
} |
824 |
|
825 |
static void stellaris_adc_update(stellaris_adc_state *s) |
826 |
{ |
827 |
int level;
|
828 |
|
829 |
level = (s->ris & s->im) != 0;
|
830 |
qemu_set_irq(s->irq, level); |
831 |
} |
832 |
|
833 |
static void stellaris_adc_trigger(void *opaque, int irq, int level) |
834 |
{ |
835 |
stellaris_adc_state *s = (stellaris_adc_state *)opaque; |
836 |
/* Some applications use the ADC as a random number source, so introduce
|
837 |
some variation into the signal. */
|
838 |
static uint32_t noise = 0; |
839 |
|
840 |
if ((s->actss & 1) == 0) { |
841 |
return;
|
842 |
} |
843 |
|
844 |
noise = noise * 314159 + 1; |
845 |
/* ??? actual inputs not implemented. Return an arbitrary value. */
|
846 |
stellaris_adc_fifo_write(s, 0, 0x200 + ((noise >> 16) & 7)); |
847 |
s->ris |= 1;
|
848 |
stellaris_adc_update(s); |
849 |
} |
850 |
|
851 |
static void stellaris_adc_reset(stellaris_adc_state *s) |
852 |
{ |
853 |
int n;
|
854 |
|
855 |
for (n = 0; n < 4; n++) { |
856 |
s->ssmux[n] = 0;
|
857 |
s->ssctl[n] = 0;
|
858 |
s->fifo[n].state = STELLARIS_ADC_FIFO_EMPTY; |
859 |
} |
860 |
} |
861 |
|
862 |
static uint32_t stellaris_adc_read(void *opaque, target_phys_addr_t offset) |
863 |
{ |
864 |
stellaris_adc_state *s = (stellaris_adc_state *)opaque; |
865 |
|
866 |
/* TODO: Implement this. */
|
867 |
offset -= s->base; |
868 |
if (offset >= 0x40 && offset < 0xc0) { |
869 |
int n;
|
870 |
n = (offset - 0x40) >> 5; |
871 |
switch (offset & 0x1f) { |
872 |
case 0x00: /* SSMUX */ |
873 |
return s->ssmux[n];
|
874 |
case 0x04: /* SSCTL */ |
875 |
return s->ssctl[n];
|
876 |
case 0x08: /* SSFIFO */ |
877 |
return stellaris_adc_fifo_read(s, n);
|
878 |
case 0x0c: /* SSFSTAT */ |
879 |
return s->fifo[n].state;
|
880 |
default:
|
881 |
break;
|
882 |
} |
883 |
} |
884 |
switch (offset) {
|
885 |
case 0x00: /* ACTSS */ |
886 |
return s->actss;
|
887 |
case 0x04: /* RIS */ |
888 |
return s->ris;
|
889 |
case 0x08: /* IM */ |
890 |
return s->im;
|
891 |
case 0x0c: /* ISC */ |
892 |
return s->ris & s->im;
|
893 |
case 0x10: /* OSTAT */ |
894 |
return s->ostat;
|
895 |
case 0x14: /* EMUX */ |
896 |
return s->emux;
|
897 |
case 0x18: /* USTAT */ |
898 |
return s->ustat;
|
899 |
case 0x20: /* SSPRI */ |
900 |
return s->sspri;
|
901 |
case 0x30: /* SAC */ |
902 |
return s->sac;
|
903 |
default:
|
904 |
cpu_abort(cpu_single_env, "strllaris_adc_read: Bad offset 0x%x\n",
|
905 |
(int)offset);
|
906 |
return 0; |
907 |
} |
908 |
} |
909 |
|
910 |
static void stellaris_adc_write(void *opaque, target_phys_addr_t offset, |
911 |
uint32_t value) |
912 |
{ |
913 |
stellaris_adc_state *s = (stellaris_adc_state *)opaque; |
914 |
|
915 |
/* TODO: Implement this. */
|
916 |
offset -= s->base; |
917 |
if (offset >= 0x40 && offset < 0xc0) { |
918 |
int n;
|
919 |
n = (offset - 0x40) >> 5; |
920 |
switch (offset & 0x1f) { |
921 |
case 0x00: /* SSMUX */ |
922 |
s->ssmux[n] = value & 0x33333333;
|
923 |
return;
|
924 |
case 0x04: /* SSCTL */ |
925 |
if (value != 6) { |
926 |
cpu_abort(cpu_single_env, "ADC: Unimplemented sequence %x\n",
|
927 |
value); |
928 |
} |
929 |
s->ssctl[n] = value; |
930 |
return;
|
931 |
default:
|
932 |
break;
|
933 |
} |
934 |
} |
935 |
switch (offset) {
|
936 |
case 0x00: /* ACTSS */ |
937 |
s->actss = value & 0xf;
|
938 |
if (value & 0xe) { |
939 |
cpu_abort(cpu_single_env, |
940 |
"Not implemented: ADC sequencers 1-3\n");
|
941 |
} |
942 |
break;
|
943 |
case 0x08: /* IM */ |
944 |
s->im = value; |
945 |
break;
|
946 |
case 0x0c: /* ISC */ |
947 |
s->ris &= ~value; |
948 |
break;
|
949 |
case 0x10: /* OSTAT */ |
950 |
s->ostat &= ~value; |
951 |
break;
|
952 |
case 0x14: /* EMUX */ |
953 |
s->emux = value; |
954 |
break;
|
955 |
case 0x18: /* USTAT */ |
956 |
s->ustat &= ~value; |
957 |
break;
|
958 |
case 0x20: /* SSPRI */ |
959 |
s->sspri = value; |
960 |
break;
|
961 |
case 0x28: /* PSSI */ |
962 |
cpu_abort(cpu_single_env, "Not implemented: ADC sample initiate\n");
|
963 |
break;
|
964 |
case 0x30: /* SAC */ |
965 |
s->sac = value; |
966 |
break;
|
967 |
default:
|
968 |
cpu_abort(cpu_single_env, "stellaris_adc_write: Bad offset 0x%x\n",
|
969 |
(int)offset);
|
970 |
} |
971 |
stellaris_adc_update(s); |
972 |
} |
973 |
|
974 |
static CPUReadMemoryFunc *stellaris_adc_readfn[] = {
|
975 |
stellaris_adc_read, |
976 |
stellaris_adc_read, |
977 |
stellaris_adc_read |
978 |
}; |
979 |
|
980 |
static CPUWriteMemoryFunc *stellaris_adc_writefn[] = {
|
981 |
stellaris_adc_write, |
982 |
stellaris_adc_write, |
983 |
stellaris_adc_write |
984 |
}; |
985 |
|
986 |
static qemu_irq stellaris_adc_init(uint32_t base, qemu_irq irq)
|
987 |
{ |
988 |
stellaris_adc_state *s; |
989 |
int iomemtype;
|
990 |
qemu_irq *qi; |
991 |
|
992 |
s = (stellaris_adc_state *)qemu_mallocz(sizeof(stellaris_adc_state));
|
993 |
s->base = base; |
994 |
s->irq = irq; |
995 |
|
996 |
iomemtype = cpu_register_io_memory(0, stellaris_adc_readfn,
|
997 |
stellaris_adc_writefn, s); |
998 |
cpu_register_physical_memory(base, 0x00001000, iomemtype);
|
999 |
stellaris_adc_reset(s); |
1000 |
qi = qemu_allocate_irqs(stellaris_adc_trigger, s, 1);
|
1001 |
return qi[0]; |
1002 |
} |
1003 |
|
1004 |
/* Some boards have both an OLED controller and SD card connected to
|
1005 |
the same SSI port, with the SD card chip select connected to a
|
1006 |
GPIO pin. Technically the OLED chip select is connected to the SSI
|
1007 |
Fss pin. We do not bother emulating that as both devices should
|
1008 |
never be selected simultaneously, and our OLED controller ignores stray
|
1009 |
0xff commands that occur when deselecting the SD card. */
|
1010 |
|
1011 |
typedef struct { |
1012 |
ssi_xfer_cb xfer_cb[2];
|
1013 |
void *opaque[2]; |
1014 |
qemu_irq irq; |
1015 |
int current_dev;
|
1016 |
} stellaris_ssi_bus_state; |
1017 |
|
1018 |
static void stellaris_ssi_bus_select(void *opaque, int irq, int level) |
1019 |
{ |
1020 |
stellaris_ssi_bus_state *s = (stellaris_ssi_bus_state *)opaque; |
1021 |
|
1022 |
s->current_dev = level; |
1023 |
} |
1024 |
|
1025 |
static int stellaris_ssi_bus_xfer(void *opaque, int val) |
1026 |
{ |
1027 |
stellaris_ssi_bus_state *s = (stellaris_ssi_bus_state *)opaque; |
1028 |
|
1029 |
return s->xfer_cb[s->current_dev](s->opaque[s->current_dev], val);
|
1030 |
} |
1031 |
|
1032 |
static void *stellaris_ssi_bus_init(qemu_irq *irqp, |
1033 |
ssi_xfer_cb cb0, void *opaque0,
|
1034 |
ssi_xfer_cb cb1, void *opaque1)
|
1035 |
{ |
1036 |
qemu_irq *qi; |
1037 |
stellaris_ssi_bus_state *s; |
1038 |
|
1039 |
s = (stellaris_ssi_bus_state *)qemu_mallocz(sizeof(stellaris_ssi_bus_state));
|
1040 |
s->xfer_cb[0] = cb0;
|
1041 |
s->opaque[0] = opaque0;
|
1042 |
s->xfer_cb[1] = cb1;
|
1043 |
s->opaque[1] = opaque1;
|
1044 |
qi = qemu_allocate_irqs(stellaris_ssi_bus_select, s, 1);
|
1045 |
*irqp = *qi; |
1046 |
return s;
|
1047 |
} |
1048 |
|
1049 |
/* Board init. */
|
1050 |
static stellaris_board_info stellaris_boards[] = {
|
1051 |
{ "LM3S811EVB",
|
1052 |
0,
|
1053 |
0x0032000e,
|
1054 |
0x001f001f, /* dc0 */ |
1055 |
0x001132bf,
|
1056 |
0x01071013,
|
1057 |
0x3f0f01ff,
|
1058 |
0x0000001f,
|
1059 |
BP_OLED_I2C |
1060 |
}, |
1061 |
{ "LM3S6965EVB",
|
1062 |
0x10010002,
|
1063 |
0x1073402e,
|
1064 |
0x00ff007f, /* dc0 */ |
1065 |
0x001133ff,
|
1066 |
0x030f5317,
|
1067 |
0x0f0f87ff,
|
1068 |
0x5000007f,
|
1069 |
BP_OLED_SSI | BP_GAMEPAD |
1070 |
} |
1071 |
}; |
1072 |
|
1073 |
static void stellaris_init(const char *kernel_filename, const char *cpu_model, |
1074 |
DisplayState *ds, stellaris_board_info *board) |
1075 |
{ |
1076 |
static const int uart_irq[] = {5, 6, 33, 34}; |
1077 |
static const int timer_irq[] = {19, 21, 23, 35}; |
1078 |
static const uint32_t gpio_addr[7] = |
1079 |
{ 0x40004000, 0x40005000, 0x40006000, 0x40007000, |
1080 |
0x40024000, 0x40025000, 0x40026000}; |
1081 |
static const int gpio_irq[7] = {0, 1, 2, 3, 4, 30, 31}; |
1082 |
|
1083 |
qemu_irq *pic; |
1084 |
qemu_irq *gpio_in[5];
|
1085 |
qemu_irq *gpio_out[5];
|
1086 |
qemu_irq adc; |
1087 |
int sram_size;
|
1088 |
int flash_size;
|
1089 |
i2c_bus *i2c; |
1090 |
int i;
|
1091 |
|
1092 |
flash_size = ((board->dc0 & 0xffff) + 1) << 1; |
1093 |
sram_size = (board->dc0 >> 18) + 1; |
1094 |
pic = armv7m_init(flash_size, sram_size, kernel_filename, cpu_model); |
1095 |
|
1096 |
if (board->dc1 & (1 << 16)) { |
1097 |
adc = stellaris_adc_init(0x40038000, pic[14]); |
1098 |
} else {
|
1099 |
adc = NULL;
|
1100 |
} |
1101 |
for (i = 0; i < 4; i++) { |
1102 |
if (board->dc2 & (0x10000 << i)) { |
1103 |
stellaris_gptm_init(0x40030000 + i * 0x1000, |
1104 |
pic[timer_irq[i]], adc); |
1105 |
} |
1106 |
} |
1107 |
|
1108 |
stellaris_sys_init(0x400fe000, pic[28], board, nd_table[0].macaddr); |
1109 |
|
1110 |
for (i = 0; i < 7; i++) { |
1111 |
if (board->dc4 & (1 << i)) { |
1112 |
gpio_in[i] = pl061_init(gpio_addr[i], pic[gpio_irq[i]], |
1113 |
&gpio_out[i]); |
1114 |
} |
1115 |
} |
1116 |
|
1117 |
if (board->dc2 & (1 << 12)) { |
1118 |
i2c = i2c_init_bus(); |
1119 |
stellaris_i2c_init(0x40020000, pic[8], i2c); |
1120 |
if (board->peripherals & BP_OLED_I2C) {
|
1121 |
ssd0303_init(ds, i2c, 0x3d);
|
1122 |
} |
1123 |
} |
1124 |
|
1125 |
for (i = 0; i < 4; i++) { |
1126 |
if (board->dc2 & (1 << i)) { |
1127 |
pl011_init(0x4000c000 + i * 0x1000, pic[uart_irq[i]], |
1128 |
serial_hds[i], PL011_LUMINARY); |
1129 |
} |
1130 |
} |
1131 |
if (board->dc2 & (1 << 4)) { |
1132 |
if (board->peripherals & BP_OLED_SSI) {
|
1133 |
void * oled;
|
1134 |
void * sd;
|
1135 |
void *ssi_bus;
|
1136 |
|
1137 |
oled = ssd0323_init(ds, &gpio_out[GPIO_C][7]);
|
1138 |
sd = ssi_sd_init(sd_bdrv); |
1139 |
|
1140 |
ssi_bus = stellaris_ssi_bus_init(&gpio_out[GPIO_D][0],
|
1141 |
ssi_sd_xfer, sd, |
1142 |
ssd0323_xfer_ssi, oled); |
1143 |
|
1144 |
pl022_init(0x40008000, pic[7], stellaris_ssi_bus_xfer, ssi_bus); |
1145 |
/* Make sure the select pin is high. */
|
1146 |
qemu_irq_raise(gpio_out[GPIO_D][0]);
|
1147 |
} else {
|
1148 |
pl022_init(0x40008000, pic[7], NULL, NULL); |
1149 |
} |
1150 |
} |
1151 |
if (board->dc4 & (1 << 28)) { |
1152 |
/* FIXME: Obey network model. */
|
1153 |
stellaris_enet_init(&nd_table[0], 0x40048000, pic[42]); |
1154 |
} |
1155 |
if (board->peripherals & BP_GAMEPAD) {
|
1156 |
qemu_irq gpad_irq[5];
|
1157 |
static const int gpad_keycode[5] = { 0xc8, 0xd0, 0xcb, 0xcd, 0x1d }; |
1158 |
|
1159 |
gpad_irq[0] = qemu_irq_invert(gpio_in[GPIO_E][0]); /* up */ |
1160 |
gpad_irq[1] = qemu_irq_invert(gpio_in[GPIO_E][1]); /* down */ |
1161 |
gpad_irq[2] = qemu_irq_invert(gpio_in[GPIO_E][2]); /* left */ |
1162 |
gpad_irq[3] = qemu_irq_invert(gpio_in[GPIO_E][3]); /* right */ |
1163 |
gpad_irq[4] = qemu_irq_invert(gpio_in[GPIO_F][1]); /* select */ |
1164 |
|
1165 |
stellaris_gamepad_init(5, gpad_irq, gpad_keycode);
|
1166 |
} |
1167 |
} |
1168 |
|
1169 |
/* FIXME: Figure out how to generate these from stellaris_boards. */
|
1170 |
static void lm3s811evb_init(int ram_size, int vga_ram_size, |
1171 |
const char *boot_device, DisplayState *ds, |
1172 |
const char *kernel_filename, const char *kernel_cmdline, |
1173 |
const char *initrd_filename, const char *cpu_model) |
1174 |
{ |
1175 |
stellaris_init(kernel_filename, cpu_model, ds, &stellaris_boards[0]);
|
1176 |
} |
1177 |
|
1178 |
static void lm3s6965evb_init(int ram_size, int vga_ram_size, |
1179 |
const char *boot_device, DisplayState *ds, |
1180 |
const char *kernel_filename, const char *kernel_cmdline, |
1181 |
const char *initrd_filename, const char *cpu_model) |
1182 |
{ |
1183 |
stellaris_init(kernel_filename, cpu_model, ds, &stellaris_boards[1]);
|
1184 |
} |
1185 |
|
1186 |
QEMUMachine lm3s811evb_machine = { |
1187 |
"lm3s811evb",
|
1188 |
"Stellaris LM3S811EVB",
|
1189 |
lm3s811evb_init, |
1190 |
}; |
1191 |
|
1192 |
QEMUMachine lm3s6965evb_machine = { |
1193 |
"lm3s6965evb",
|
1194 |
"Stellaris LM3S6965EVB",
|
1195 |
lm3s6965evb_init, |
1196 |
}; |